[1] | 1 | /* |
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| 2 | * vfs.c - Virtual File System implementation. |
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| 3 | * |
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| 4 | * Author Mohamed Lamine Karaoui (2015) |
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[623] | 5 | * Alain Greiner (2016,2017,2018,2019) |
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[1] | 6 | * |
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| 7 | * Copyright (c) UPMC Sorbonne Universites |
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| 8 | * |
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| 9 | * This file is part of ALMOS-MKH. |
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| 10 | * |
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| 11 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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| 12 | * under the terms of the GNU General Public License as published by |
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| 13 | * the Free Software Foundation; version 2.0 of the License. |
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| 14 | * |
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| 15 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 18 | * General Public License for more details. |
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| 19 | * |
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| 20 | * You should have received a copy of the GNU General Public License |
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| 21 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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| 22 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 23 | */ |
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| 24 | |
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[14] | 25 | #include <kernel_config.h> |
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[457] | 26 | #include <hal_kernel_types.h> |
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[1] | 27 | #include <hal_atomic.h> |
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| 28 | #include <hal_special.h> |
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| 29 | #include <printk.h> |
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| 30 | #include <list.h> |
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| 31 | #include <xlist.h> |
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| 32 | #include <slist.h> |
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| 33 | #include <xhtab.h> |
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[430] | 34 | #include <string.h> |
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[23] | 35 | #include <rpc.h> |
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[1] | 36 | #include <errno.h> |
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| 37 | #include <kmem.h> |
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| 38 | #include <mapper.h> |
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| 39 | #include <thread.h> |
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[337] | 40 | #include <chdev.h> |
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[1] | 41 | #include <process.h> |
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[568] | 42 | #include <cluster.h> |
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[23] | 43 | #include <vfs.h> |
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[1] | 44 | #include <fatfs.h> |
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| 45 | #include <ramfs.h> |
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[23] | 46 | #include <devfs.h> |
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| 47 | #include <syscalls.h> |
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[1] | 48 | |
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| 49 | ////////////////////////////////////////////////////////////////////////////////////////// |
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[50] | 50 | // Extern variables |
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[1] | 51 | ////////////////////////////////////////////////////////////////////////////////////////// |
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| 52 | |
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[337] | 53 | extern vfs_ctx_t fs_context[FS_TYPES_NR]; // allocated in kernel_init.c |
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| 54 | extern chdev_directory_t chdev_dir; // allocated in kernel_init.c |
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[568] | 55 | extern char * lock_type_str[]; // allocated in kernel_init.c |
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[50] | 56 | |
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[602] | 57 | /////////////////////////////////////////////////////////////////////////////////////////// |
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| 58 | // VFS Context related functions |
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[1] | 59 | ////////////////////////////////////////////////////////////////////////////////////////// |
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| 60 | |
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[188] | 61 | //////////////////////////////////////// |
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| 62 | void vfs_ctx_init( vfs_fs_type_t type, |
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| 63 | uint32_t attr, |
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| 64 | uint32_t total_clusters, |
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| 65 | uint32_t cluster_size, |
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| 66 | xptr_t vfs_root_xp, |
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| 67 | void * extend ) |
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| 68 | { |
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| 69 | vfs_ctx_t * vfs_ctx = &fs_context[type]; |
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| 70 | |
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| 71 | vfs_ctx->type = type; |
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| 72 | vfs_ctx->attr = attr; |
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| 73 | vfs_ctx->total_clusters = total_clusters; |
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| 74 | vfs_ctx->cluster_size = cluster_size; |
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| 75 | vfs_ctx->vfs_root_xp = vfs_root_xp; |
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| 76 | vfs_ctx->extend = extend; |
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| 77 | |
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[568] | 78 | busylock_init( &vfs_ctx->lock , LOCK_VFS_CTX ); |
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[188] | 79 | |
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| 80 | bitmap_init( vfs_ctx->bitmap , BITMAP_SIZE(CONFIG_VFS_MAX_INODES) ); |
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| 81 | } |
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| 82 | |
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[23] | 83 | //////////////////////////////////////////// |
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[1] | 84 | error_t vfs_ctx_inum_alloc( vfs_ctx_t * ctx, |
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| 85 | uint32_t * inum ) |
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| 86 | { |
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| 87 | // get lock on inum allocator |
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[568] | 88 | busylock_acquire( &ctx->lock ); |
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[1] | 89 | |
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| 90 | // get lid from local inum allocator |
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[23] | 91 | uint32_t lid = bitmap_ffc( ctx->bitmap , CONFIG_VFS_MAX_INODES ); |
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[1] | 92 | |
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[473] | 93 | if( lid == 0xFFFFFFFF ) // no more free slot => error |
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[1] | 94 | { |
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| 95 | // release lock |
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[568] | 96 | busylock_release( &ctx->lock ); |
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[1] | 97 | |
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| 98 | // return error |
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| 99 | return 1; |
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| 100 | } |
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| 101 | else // found => return inum |
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| 102 | { |
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| 103 | // set slot allocated |
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[23] | 104 | bitmap_set( ctx->bitmap , lid ); |
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[1] | 105 | |
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| 106 | // release lock |
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[568] | 107 | busylock_release( &ctx->lock ); |
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[1] | 108 | |
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| 109 | // return inum |
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| 110 | *inum = (((uint32_t)local_cxy) << 16) | (lid & 0xFFFF); |
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| 111 | return 0; |
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| 112 | } |
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| 113 | } |
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| 114 | |
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| 115 | //////////////////////////////////////////// |
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| 116 | void vfs_ctx_inum_release( vfs_ctx_t * ctx, |
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| 117 | uint32_t inum ) |
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| 118 | { |
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[23] | 119 | bitmap_clear( ctx->bitmap , inum & 0xFFFF ); |
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[1] | 120 | } |
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| 121 | |
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| 122 | ////////////////////////////////////////////////////////////////////////////////////////// |
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[602] | 123 | // VFS inode descriptor related functions |
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[1] | 124 | ////////////////////////////////////////////////////////////////////////////////////////// |
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| 125 | |
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[598] | 126 | const char * vfs_inode_type_str( vfs_inode_type_t type ) |
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[188] | 127 | { |
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[598] | 128 | switch ( type ) |
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| 129 | { |
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| 130 | case INODE_TYPE_FILE: return "FILE"; |
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| 131 | case INODE_TYPE_DIR: return "DIR "; |
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| 132 | case INODE_TYPE_FIFO: return "FIFO"; |
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| 133 | case INODE_TYPE_PIPE: return "PIPE"; |
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| 134 | case INODE_TYPE_SOCK: return "SOCK"; |
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| 135 | case INODE_TYPE_DEV: return "DEV "; |
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[611] | 136 | case INODE_TYPE_BLK: return "BLK "; |
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[598] | 137 | case INODE_TYPE_SYML: return "SYML"; |
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| 138 | default: return "undefined"; |
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[527] | 139 | } |
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[188] | 140 | } |
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| 141 | |
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[610] | 142 | //////////////////////////////////////////////////// |
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| 143 | error_t vfs_inode_create( vfs_fs_type_t fs_type, |
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[23] | 144 | uint32_t attr, |
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| 145 | uint32_t rights, |
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| 146 | uid_t uid, |
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| 147 | gid_t gid, |
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| 148 | xptr_t * inode_xp ) |
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[1] | 149 | { |
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| 150 | mapper_t * mapper; // associated mapper( to be allocated) |
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| 151 | vfs_inode_t * inode; // inode descriptor (to be allocated) |
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| 152 | uint32_t inum; // inode identifier (to be allocated) |
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| 153 | vfs_ctx_t * ctx; // file system context |
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| 154 | kmem_req_t req; // request to kernel memory allocator |
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| 155 | error_t error; |
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| 156 | |
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[438] | 157 | #if DEBUG_VFS_INODE_CREATE |
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[568] | 158 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; |
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| 159 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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| 160 | cxy_t dentry_cxy = GET_CXY( dentry_xp ); |
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| 161 | vfs_dentry_t * dentry_ptr = GET_PTR( dentry_xp ); |
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| 162 | thread_t * this = CURRENT_THREAD; |
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| 163 | if( dentry_xp != XPTR_NULL ) hal_remote_strcpy( XPTR( local_cxy , name ), |
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| 164 | XPTR( dentry_cxy , dentry_ptr->name ) ); |
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| 165 | else strcpy( name , "/" ); |
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[438] | 166 | if( DEBUG_VFS_INODE_CREATE < cycle ) |
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[598] | 167 | printk("\n[%s] thread[%x,%x] enter for <%s> / cycle %d\n", |
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| 168 | __FUNCTION__, this->process->pid, this->trdid, name, cycle ); |
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[433] | 169 | #endif |
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[279] | 170 | |
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[23] | 171 | // check fs type and get pointer on context |
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| 172 | if ( fs_type == FS_TYPE_FATFS ) ctx = &fs_context[FS_TYPE_FATFS]; |
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| 173 | else if( fs_type == FS_TYPE_RAMFS ) ctx = &fs_context[FS_TYPE_RAMFS]; |
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| 174 | else if( fs_type == FS_TYPE_DEVFS ) ctx = &fs_context[FS_TYPE_DEVFS]; |
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[1] | 175 | else |
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| 176 | { |
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| 177 | ctx = NULL; |
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[492] | 178 | assert( false , "illegal file system type = %d\n" , fs_type ); |
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[1] | 179 | } |
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| 180 | |
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| 181 | // allocate inum |
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| 182 | error = vfs_ctx_inum_alloc( ctx , &inum ); |
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| 183 | |
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| 184 | if( error ) |
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| 185 | { |
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| 186 | printk("\n[ERROR] in %s : cannot allocate inum\n", __FUNCTION__ ); |
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| 187 | return ENOMEM; |
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| 188 | } |
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| 189 | |
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| 190 | // allocate memory for mapper |
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[246] | 191 | mapper = mapper_create( fs_type ); |
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[1] | 192 | |
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| 193 | if( mapper == NULL ) |
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| 194 | { |
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| 195 | printk("\n[ERROR] in %s : cannot allocate mapper\n", __FUNCTION__ ); |
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| 196 | vfs_ctx_inum_release( ctx , inum ); |
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| 197 | return ENOMEM; |
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| 198 | } |
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| 199 | |
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[23] | 200 | // allocate memory for VFS inode descriptor |
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[1] | 201 | req.type = KMEM_VFS_INODE; |
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| 202 | req.size = sizeof(vfs_inode_t); |
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| 203 | req.flags = AF_KERNEL | AF_ZERO; |
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| 204 | inode = (vfs_inode_t *)kmem_alloc( &req ); |
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| 205 | |
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| 206 | if( inode == NULL ) |
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| 207 | { |
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| 208 | printk("\n[ERROR] in %s : cannot allocate inode descriptor\n", __FUNCTION__ ); |
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| 209 | vfs_ctx_inum_release( ctx , inum ); |
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| 210 | mapper_destroy( mapper ); |
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[610] | 211 | return -1; |
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[1] | 212 | } |
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| 213 | |
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| 214 | // initialize inode descriptor |
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[623] | 215 | inode->type = INODE_TYPE_FILE; // default value |
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[1] | 216 | inode->inum = inum; |
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| 217 | inode->attr = attr; |
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[23] | 218 | inode->rights = rights; |
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[1] | 219 | inode->uid = uid; |
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| 220 | inode->gid = gid; |
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| 221 | inode->ctx = ctx; |
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[246] | 222 | inode->mapper = mapper; |
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[602] | 223 | inode->extend = NULL; |
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[610] | 224 | inode->links = 0; |
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[1] | 225 | |
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[246] | 226 | // initialise inode field in mapper |
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| 227 | mapper->inode = inode; |
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| 228 | |
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[610] | 229 | // initialize chidren dentries xhtab |
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[204] | 230 | xhtab_init( &inode->children , XHTAB_DENTRY_TYPE ); |
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[1] | 231 | |
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[610] | 232 | // initialize parents dentries xlist |
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| 233 | xlist_root_init( XPTR( local_cxy , &inode->parents ) ); |
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| 234 | |
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| 235 | // initialize lock protecting size |
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| 236 | remote_rwlock_init( XPTR( local_cxy , &inode->size_lock ), LOCK_VFS_SIZE ); |
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[1] | 237 | |
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[610] | 238 | // initialise lock protecting inode tree traversal |
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| 239 | remote_rwlock_init( XPTR( local_cxy , &inode->main_lock ), LOCK_VFS_MAIN ); |
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[568] | 240 | |
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[610] | 241 | // return extended pointer on inode |
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| 242 | *inode_xp = XPTR( local_cxy , inode ); |
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| 243 | |
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[438] | 244 | #if DEBUG_VFS_INODE_CREATE |
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[568] | 245 | cycle = (uint32_t)hal_get_cycles(); |
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[438] | 246 | if( DEBUG_VFS_INODE_CREATE < cycle ) |
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[598] | 247 | printk("\n[%s] thread[%x,%x] exit for <%s> / inode [%x,%x] / cycle %d\n", |
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| 248 | __FUNCTION__, this->process->pid, this->trdid, name, local_cxy, inode, cycle ); |
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[433] | 249 | #endif |
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[401] | 250 | |
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[1] | 251 | return 0; |
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| 252 | |
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| 253 | } // end vfs_inode_create() |
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| 254 | |
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[602] | 255 | ///////////////////////////////////////////// |
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| 256 | void vfs_inode_destroy( vfs_inode_t * inode ) |
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[1] | 257 | { |
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| 258 | // release memory allocated for mapper |
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| 259 | mapper_destroy( inode->mapper ); |
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| 260 | |
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| 261 | // release memory allocate for inode descriptor |
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| 262 | kmem_req_t req; |
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| 263 | req.ptr = inode; |
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| 264 | req.type = KMEM_VFS_INODE; |
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| 265 | kmem_free( &req ); |
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| 266 | |
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| 267 | } // end vfs_inode_destroy() |
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| 268 | |
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| 269 | ////////////////////////////////////////////// |
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| 270 | uint32_t vfs_inode_get_size( xptr_t inode_xp ) |
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| 271 | { |
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| 272 | // get inode cluster and local pointer |
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| 273 | cxy_t cxy = GET_CXY( inode_xp ); |
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[473] | 274 | vfs_inode_t * ptr = GET_PTR( inode_xp ); |
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[1] | 275 | |
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[623] | 276 | // build extended pointers on lock & size |
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| 277 | xptr_t lock_xp = XPTR( cxy , &ptr->size_lock ); |
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| 278 | xptr_t size_xp = XPTR( cxy , &ptr->size ); |
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| 279 | |
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| 280 | // take lock in read mode |
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| 281 | remote_rwlock_rd_acquire( lock_xp ); |
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| 282 | |
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[1] | 283 | // get size |
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[623] | 284 | uint32_t size = hal_remote_l32( size_xp ); |
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| 285 | |
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| 286 | // release lock from read mode |
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| 287 | remote_rwlock_rd_release( lock_xp ); |
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| 288 | |
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[1] | 289 | return size; |
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| 290 | } |
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| 291 | |
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[623] | 292 | /////////////////////////////////////////////// |
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| 293 | void vfs_inode_update_size( xptr_t inode_xp, |
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| 294 | uint32_t size ) |
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[1] | 295 | { |
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| 296 | // get inode cluster and local pointer |
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| 297 | cxy_t cxy = GET_CXY( inode_xp ); |
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[473] | 298 | vfs_inode_t * ptr = GET_PTR( inode_xp ); |
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[1] | 299 | |
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[623] | 300 | // build extended pointers on lock & size |
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| 301 | xptr_t lock_xp = XPTR( cxy , &ptr->size_lock ); |
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| 302 | xptr_t size_xp = XPTR( cxy , &ptr->size ); |
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| 303 | |
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| 304 | // take lock in write mode |
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| 305 | remote_rwlock_wr_acquire( lock_xp ); |
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| 306 | |
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| 307 | // get current size |
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| 308 | uint32_t current_size = hal_remote_l32( size_xp ); |
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| 309 | |
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| 310 | // set size if required |
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| 311 | if( current_size < size ) hal_remote_s32( size_xp , size ); |
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| 312 | |
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| 313 | // release lock from write mode |
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| 314 | remote_rwlock_wr_release( lock_xp ); |
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[1] | 315 | } |
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| 316 | |
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[101] | 317 | //////////////////////////////////////// |
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| 318 | void vfs_inode_unlock( xptr_t inode_xp ) |
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[1] | 319 | { |
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| 320 | // get inode cluster and local pointer |
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| 321 | cxy_t cxy = GET_CXY( inode_xp ); |
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[473] | 322 | vfs_inode_t * ptr = GET_PTR( inode_xp ); |
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[1] | 323 | |
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| 324 | // release the main lock |
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[568] | 325 | remote_busylock_release( XPTR( cxy , &ptr->main_lock ) ); |
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[1] | 326 | } |
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| 327 | |
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[101] | 328 | ////////////////////////////////////// |
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| 329 | void vfs_inode_lock( xptr_t inode_xp ) |
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[1] | 330 | { |
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| 331 | // get inode cluster and local pointer |
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| 332 | cxy_t cxy = GET_CXY( inode_xp ); |
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[473] | 333 | vfs_inode_t * ptr = GET_PTR( inode_xp ); |
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[1] | 334 | |
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| 335 | // get the main lock |
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[568] | 336 | remote_busylock_acquire( XPTR( cxy , &ptr->main_lock ) ); |
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[1] | 337 | } |
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| 338 | |
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[610] | 339 | /////////////////////////////////////////// |
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| 340 | void vfs_inode_get_name( xptr_t inode_xp, |
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| 341 | char * name ) |
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[101] | 342 | { |
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[610] | 343 | cxy_t inode_cxy; // inode cluster identifier |
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| 344 | vfs_inode_t * inode_ptr; // local pointer on inode |
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| 345 | xptr_t parents_root_xp; // extended pointer on inode parents root |
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[204] | 346 | |
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| 347 | // get inode cluster and local pointer |
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| 348 | inode_cxy = GET_CXY( inode_xp ); |
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[473] | 349 | inode_ptr = GET_PTR( inode_xp ); |
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[204] | 350 | |
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[610] | 351 | // build extended pointer on parents dentries root |
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| 352 | parents_root_xp = XPTR( inode_cxy , &inode_ptr->parents ); |
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[204] | 353 | |
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[610] | 354 | // check VFS root |
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| 355 | if( xlist_is_empty( parents_root_xp ) ) // inode is the VFS root |
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[204] | 356 | { |
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| 357 | strcpy( name , "/" ); |
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| 358 | } |
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[610] | 359 | else // not the VFS root |
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[204] | 360 | { |
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[610] | 361 | xptr_t dentry_xp; |
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| 362 | cxy_t dentry_cxy; |
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| 363 | vfs_dentry_t * dentry_ptr; |
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| 364 | |
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| 365 | // get first name in list of parents |
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| 366 | dentry_xp = XLIST_FIRST( parents_root_xp , vfs_dentry_t , parents ); |
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[204] | 367 | dentry_cxy = GET_CXY( dentry_xp ); |
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[473] | 368 | dentry_ptr = GET_PTR( dentry_xp ); |
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[204] | 369 | |
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| 370 | hal_remote_strcpy( XPTR( local_cxy , name ) , |
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[610] | 371 | XPTR( dentry_cxy , dentry_ptr->name ) ); |
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[204] | 372 | } |
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[610] | 373 | |
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[409] | 374 | } // end vfs_inode_get_name() |
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[204] | 375 | |
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[602] | 376 | /////////////////////////////////////////////////////// |
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| 377 | error_t vfs_inode_load_all_pages( vfs_inode_t * inode ) |
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| 378 | { |
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| 379 | |
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| 380 | assert( (inode != NULL) , "inode pointer is NULL\n" ); |
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| 381 | |
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| 382 | uint32_t page_id; |
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| 383 | xptr_t page_xp; |
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| 384 | |
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| 385 | mapper_t * mapper = inode->mapper; |
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| 386 | uint32_t size = inode->size; |
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| 387 | |
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| 388 | assert( (mapper != NULL) , "mapper pointer is NULL\n" ); |
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| 389 | |
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| 390 | #if DEBUG_VFS_INODE_LOAD_ALL |
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| 391 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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| 392 | thread_t * this = CURRENT_THREAD; |
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| 393 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; |
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| 394 | vfs_inode_get_name( XPTR( local_cxy , inode ) , name ); |
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| 395 | if( DEBUG_VFS_INODE_LOAD_ALL < cycle ) |
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| 396 | printk("\n[%s] thread[%x,%x] enter for <%s> in cluster %x / cycle %d\n", |
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| 397 | __FUNCTION__, this->process->pid, this->trdid, name, local_cxy, cycle ); |
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| 398 | #endif |
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| 399 | |
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| 400 | // compute number of pages |
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| 401 | uint32_t npages = size >> CONFIG_PPM_PAGE_SHIFT; |
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| 402 | if( (size & CONFIG_PPM_PAGE_MASK) || (size == 0) ) npages++; |
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| 403 | |
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| 404 | // loop on pages |
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| 405 | for( page_id = 0 ; page_id < npages ; page_id ++ ) |
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| 406 | { |
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| 407 | // If the mage is missing, this function allocates the missing page, |
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| 408 | // and load the page from IOC device into mapper |
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| 409 | page_xp = mapper_remote_get_page( XPTR( local_cxy , mapper ), page_id ); |
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| 410 | |
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| 411 | if( page_xp == XPTR_NULL ) return -1; |
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| 412 | } |
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| 413 | |
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| 414 | #if DEBUG_VFS_INODE_LOAD_ALL |
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| 415 | cycle = (uint32_t)hal_get_cycles(); |
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| 416 | if( DEBUG_VFS_INODE_LOAD_ALL < cycle ) |
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| 417 | printk("\n[%s] thread[%x,%x] exit for <%x> in cluster %x / cycle %d\n", |
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| 418 | __FUNCTION__, this->process->pid, this->trdid, name, local_cxy, cycle ); |
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| 419 | #endif |
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| 420 | |
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| 421 | return 0; |
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| 422 | |
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| 423 | } // end vfs_inode_load_all_pages() |
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| 424 | |
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[204] | 425 | //////////////////////////////////////////////////////////////////////////////////////////// |
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[602] | 426 | // VFS dentry descriptor related functions |
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[1] | 427 | ////////////////////////////////////////////////////////////////////////////////////////// |
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| 428 | |
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[23] | 429 | /////////////////////////////////////////////////// |
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| 430 | error_t vfs_dentry_create( vfs_fs_type_t fs_type, |
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| 431 | char * name, |
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| 432 | xptr_t * dentry_xp ) |
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[1] | 433 | { |
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| 434 | vfs_ctx_t * ctx; // context descriptor |
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| 435 | vfs_dentry_t * dentry; // dentry descriptor (to be allocated) |
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| 436 | kmem_req_t req; // request to kernel memory allocator |
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| 437 | |
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[438] | 438 | #if DEBUG_VFS_DENTRY_CREATE |
---|
[598] | 439 | thread_t * this = CURRENT_THREAD; |
---|
[433] | 440 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 441 | if( DEBUG_VFS_DENTRY_CREATE < cycle ) |
---|
[614] | 442 | printk("\n[%s] thread[%x,%x] enter for <%s> / cycle %d\n", |
---|
| 443 | __FUNCTION__, this->process->pid, this->trdid, name, cycle ); |
---|
[433] | 444 | #endif |
---|
[296] | 445 | |
---|
[188] | 446 | // get pointer on context |
---|
[23] | 447 | if ( fs_type == FS_TYPE_FATFS ) ctx = &fs_context[FS_TYPE_FATFS]; |
---|
| 448 | else if( fs_type == FS_TYPE_RAMFS ) ctx = &fs_context[FS_TYPE_RAMFS]; |
---|
| 449 | else if( fs_type == FS_TYPE_DEVFS ) ctx = &fs_context[FS_TYPE_DEVFS]; |
---|
[459] | 450 | else |
---|
[1] | 451 | { |
---|
| 452 | ctx = NULL; |
---|
[610] | 453 | return -1; |
---|
[1] | 454 | } |
---|
| 455 | |
---|
| 456 | // get name length |
---|
| 457 | uint32_t length = strlen( name ); |
---|
| 458 | |
---|
[459] | 459 | if( length >= CONFIG_VFS_MAX_NAME_LENGTH ) return EINVAL; |
---|
[437] | 460 | |
---|
[1] | 461 | // allocate memory for dentry descriptor |
---|
| 462 | req.type = KMEM_VFS_DENTRY; |
---|
| 463 | req.size = sizeof(vfs_dentry_t); |
---|
| 464 | req.flags = AF_KERNEL | AF_ZERO; |
---|
| 465 | dentry = (vfs_dentry_t *)kmem_alloc( &req ); |
---|
| 466 | |
---|
[610] | 467 | if( dentry == NULL ) |
---|
| 468 | { |
---|
| 469 | printk("\n[ERROR] in %s : cannot allocate dentry descriptor\n", |
---|
| 470 | __FUNCTION__ ); |
---|
| 471 | return -1; |
---|
| 472 | } |
---|
[437] | 473 | |
---|
[1] | 474 | // initialize dentry descriptor |
---|
| 475 | dentry->ctx = ctx; |
---|
| 476 | dentry->length = length; |
---|
[602] | 477 | dentry->extend = NULL; |
---|
[1] | 478 | strcpy( dentry->name , name ); |
---|
| 479 | |
---|
[23] | 480 | // return extended pointer on dentry |
---|
[1] | 481 | *dentry_xp = XPTR( local_cxy , dentry ); |
---|
| 482 | |
---|
[438] | 483 | #if DEBUG_VFS_DENTRY_CREATE |
---|
[433] | 484 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 485 | if( DEBUG_VFS_DENTRY_CREATE < cycle ) |
---|
[602] | 486 | printk("\n[%s] thread[%x,%x] exit for <%s> / dentry [%x,%x] / cycle %d\n", |
---|
| 487 | __FUNCTION__, this->process->pid, this->trdid, name, local_cxy, dentry, cycle ); |
---|
[433] | 488 | #endif |
---|
[296] | 489 | |
---|
[1] | 490 | return 0; |
---|
| 491 | |
---|
| 492 | } // end vfs_dentry_create() |
---|
| 493 | |
---|
[602] | 494 | //////////////////////////////////////////////// |
---|
| 495 | void vfs_dentry_destroy( vfs_dentry_t * dentry ) |
---|
[1] | 496 | { |
---|
[459] | 497 | // release memory allocated to dentry |
---|
[1] | 498 | kmem_req_t req; |
---|
| 499 | req.ptr = dentry; |
---|
| 500 | req.type = KMEM_VFS_DENTRY; |
---|
| 501 | kmem_free( &req ); |
---|
[459] | 502 | |
---|
[602] | 503 | } // end vfs_dentry_destroy() |
---|
| 504 | |
---|
| 505 | |
---|
[1] | 506 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
[602] | 507 | // VFS file descriptor related functions |
---|
[1] | 508 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 509 | |
---|
[23] | 510 | ///////////////////////////////////////////// |
---|
| 511 | error_t vfs_file_create( vfs_inode_t * inode, |
---|
| 512 | uint32_t attr, |
---|
| 513 | xptr_t * file_xp ) |
---|
| 514 | { |
---|
| 515 | vfs_file_t * file; |
---|
| 516 | kmem_req_t req; |
---|
| 517 | |
---|
[568] | 518 | #if DEBUG_VFS_FILE_CREATE |
---|
[598] | 519 | thread_t * this = CURRENT_THREAD; |
---|
[568] | 520 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
| 521 | if( DEBUG_VFS_OPEN < cycle ) |
---|
[598] | 522 | printk("\n[%s] thread[%x,%x] enter for inode %x in cluster %x / cycle %d\n", |
---|
| 523 | __FUNCTION__, this->process->pid, this->trdid, inode, local_cxy, cycle ); |
---|
[568] | 524 | #endif |
---|
| 525 | |
---|
[23] | 526 | // allocate memory for new file descriptor |
---|
| 527 | req.type = KMEM_VFS_FILE; |
---|
| 528 | req.size = sizeof(vfs_file_t); |
---|
| 529 | req.flags = AF_KERNEL | AF_ZERO; |
---|
| 530 | file = (vfs_file_t *)kmem_alloc( &req ); |
---|
| 531 | |
---|
| 532 | if( file == NULL ) return ENOMEM; |
---|
| 533 | |
---|
| 534 | // initializes new file descriptor |
---|
| 535 | file->gc = 0; |
---|
| 536 | file->type = inode->type; |
---|
| 537 | file->attr = attr; |
---|
| 538 | file->offset = 0; |
---|
[337] | 539 | file->refcount = 1; |
---|
[23] | 540 | file->inode = inode; |
---|
| 541 | file->ctx = inode->ctx; |
---|
| 542 | file->mapper = inode->mapper; |
---|
| 543 | |
---|
[568] | 544 | remote_rwlock_init( XPTR( local_cxy , &file->lock ), LOCK_VFS_FILE ); |
---|
[23] | 545 | |
---|
| 546 | *file_xp = XPTR( local_cxy , file ); |
---|
[459] | 547 | |
---|
[568] | 548 | #if DEBUG_VFS_FILE_CREATE |
---|
| 549 | cycle = (uint32_t)hal_get_cycles(); |
---|
[459] | 550 | if( DEBUG_VFS_OPEN < cycle ) |
---|
[598] | 551 | printk("\n[%s] thread[%x,%x] created file %x in cluster %x / cycle %d\n", |
---|
| 552 | __FUNCTION__, this->process->pid, this->trdid, file, local_cxy, cycle ); |
---|
[459] | 553 | #endif |
---|
| 554 | |
---|
[23] | 555 | return 0; |
---|
| 556 | |
---|
| 557 | } // end vfs_file_create() |
---|
| 558 | |
---|
| 559 | /////////////////////////////////////////// |
---|
| 560 | void vfs_file_destroy( vfs_file_t * file ) |
---|
| 561 | { |
---|
| 562 | |
---|
[610] | 563 | // check refcount |
---|
[623] | 564 | // assert( (file->refcount == 0) , "refcount non zero\n" ); |
---|
[610] | 565 | |
---|
[23] | 566 | kmem_req_t req; |
---|
| 567 | req.ptr = file; |
---|
| 568 | req.type = KMEM_VFS_FILE; |
---|
| 569 | kmem_free( &req ); |
---|
| 570 | |
---|
[459] | 571 | #if DEBUG_VFS_CLOSE |
---|
[623] | 572 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 573 | vfs_file_get_name( XPTR( local_cxy , file ) , name ); |
---|
[598] | 574 | thread_t * this = CURRENT_THREAD; |
---|
[459] | 575 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
| 576 | if( DEBUG_VFS_CLOSE < cycle ) |
---|
[623] | 577 | printk("\n[%s] thread[%x,%x] deleted file <%s> in cluster %x / cycle %d\n", |
---|
| 578 | __FUNCTION__, this->process->pid, this->trdid, name, local_cxy, cycle ); |
---|
[459] | 579 | #endif |
---|
| 580 | |
---|
[23] | 581 | } // end vfs_file_destroy() |
---|
| 582 | |
---|
| 583 | |
---|
[1] | 584 | //////////////////////////////////////// |
---|
| 585 | void vfs_file_count_up( xptr_t file_xp ) |
---|
| 586 | { |
---|
| 587 | // get file cluster and local pointer |
---|
| 588 | cxy_t file_cxy = GET_CXY( file_xp ); |
---|
[459] | 589 | vfs_file_t * file_ptr = GET_PTR( file_xp ); |
---|
[1] | 590 | |
---|
| 591 | // atomically increment count |
---|
| 592 | hal_remote_atomic_add( XPTR( file_cxy , &file_ptr->refcount ) , 1 ); |
---|
| 593 | } |
---|
| 594 | |
---|
| 595 | ////////////////////////////////////////// |
---|
| 596 | void vfs_file_count_down( xptr_t file_xp ) |
---|
| 597 | { |
---|
| 598 | // get file cluster and local pointer |
---|
| 599 | cxy_t file_cxy = GET_CXY( file_xp ); |
---|
[459] | 600 | vfs_file_t * file_ptr = GET_PTR( file_xp ); |
---|
[1] | 601 | |
---|
| 602 | // atomically decrement count |
---|
| 603 | hal_remote_atomic_add( XPTR( file_cxy , &file_ptr->refcount ) , -1 ); |
---|
| 604 | } |
---|
| 605 | |
---|
[623] | 606 | /////////////////////////////////////// |
---|
| 607 | void vfs_file_get_name( xptr_t file_xp, |
---|
| 608 | char * name ) |
---|
| 609 | { |
---|
| 610 | // get cluster and local pointer on remote file |
---|
| 611 | vfs_file_t * file_ptr = GET_PTR( file_xp ); |
---|
| 612 | cxy_t file_cxy = GET_CXY( file_xp ); |
---|
| 613 | |
---|
| 614 | // get pointers on remote inode |
---|
| 615 | vfs_inode_t * inode_ptr = hal_remote_lpt( XPTR( file_cxy , &file_ptr->inode ) ); |
---|
| 616 | xptr_t inode_xp = XPTR( file_cxy , inode_ptr ); |
---|
| 617 | |
---|
| 618 | // call the relevant function |
---|
| 619 | vfs_inode_get_name( inode_xp , name ); |
---|
| 620 | } |
---|
| 621 | |
---|
| 622 | |
---|
[23] | 623 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
[602] | 624 | // "syscalls" API related functions |
---|
[23] | 625 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 626 | |
---|
[407] | 627 | ////////////////////////////////////// |
---|
[610] | 628 | error_t vfs_open( xptr_t root_xp, |
---|
[407] | 629 | char * path, |
---|
[610] | 630 | xptr_t process_xp, |
---|
[407] | 631 | uint32_t flags, |
---|
| 632 | uint32_t mode, |
---|
| 633 | xptr_t * new_file_xp, |
---|
| 634 | uint32_t * new_file_id ) |
---|
[1] | 635 | { |
---|
[610] | 636 | error_t error; |
---|
| 637 | xptr_t inode_xp; // extended pointer on target inode |
---|
| 638 | cxy_t inode_cxy; // inode cluster identifier |
---|
| 639 | vfs_inode_t * inode_ptr; // inode local pointer |
---|
| 640 | uint32_t file_attr; // file descriptor attributes |
---|
| 641 | uint32_t lookup_mode; // lookup working mode |
---|
| 642 | xptr_t file_xp; // extended pointer on created file descriptor |
---|
| 643 | uint32_t file_id; // created file descriptor index in reference fd_array |
---|
| 644 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
| 645 | vfs_inode_t * vfs_root_ptr; // local pointer on VFS root inode |
---|
| 646 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
| 647 | xptr_t lock_xp; // extended pointer on Inode Tree lock |
---|
[1] | 648 | |
---|
[602] | 649 | if( mode != 0 ) |
---|
| 650 | { |
---|
| 651 | printk("\n[ERROR] in %s : the mode parameter is not supported yet\n" ); |
---|
| 652 | return -1; |
---|
| 653 | } |
---|
| 654 | |
---|
[610] | 655 | thread_t * this = CURRENT_THREAD; |
---|
| 656 | process_t * process = this->process; |
---|
| 657 | |
---|
[438] | 658 | #if DEBUG_VFS_OPEN |
---|
[433] | 659 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 660 | if( DEBUG_VFS_OPEN < cycle ) |
---|
[610] | 661 | printk("\n[%s] thread[%x,%x] enter for <%s> / root_inode (%x,%x) / cycle %d\n", |
---|
| 662 | __FUNCTION__, process->pid, this->trdid, path, GET_CXY(root_xp), GET_PTR(root_xp), cycle ); |
---|
[433] | 663 | #endif |
---|
[101] | 664 | |
---|
[23] | 665 | // compute lookup working mode |
---|
| 666 | lookup_mode = VFS_LOOKUP_OPEN; |
---|
| 667 | if( (flags & O_DIR ) ) lookup_mode |= VFS_LOOKUP_DIR; |
---|
| 668 | if( (flags & O_CREAT ) ) lookup_mode |= VFS_LOOKUP_CREATE; |
---|
| 669 | if( (flags & O_EXCL ) ) lookup_mode |= VFS_LOOKUP_EXCL; |
---|
| 670 | |
---|
| 671 | // compute attributes for the created file |
---|
| 672 | file_attr = 0; |
---|
[407] | 673 | if( (flags & O_RDONLY ) == 0 ) file_attr |= FD_ATTR_WRITE_ENABLE; |
---|
| 674 | if( (flags & O_WRONLY ) == 0 ) file_attr |= FD_ATTR_READ_ENABLE; |
---|
[23] | 675 | if( (flags & O_SYNC ) ) file_attr |= FD_ATTR_SYNC; |
---|
| 676 | if( (flags & O_APPEND ) ) file_attr |= FD_ATTR_APPEND; |
---|
| 677 | if( (flags & O_CLOEXEC) ) file_attr |= FD_ATTR_CLOSE_EXEC; |
---|
[1] | 678 | |
---|
[610] | 679 | // build extended pointer on lock protecting Inode Tree |
---|
| 680 | vfs_root_xp = process->vfs_root_xp; |
---|
| 681 | vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
| 682 | vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
| 683 | lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
| 684 | |
---|
| 685 | // take lock protecting Inode Tree in read mode |
---|
| 686 | remote_rwlock_rd_acquire( lock_xp ); |
---|
| 687 | |
---|
[23] | 688 | // get extended pointer on target inode |
---|
[610] | 689 | error = vfs_lookup( root_xp, |
---|
| 690 | path, |
---|
| 691 | lookup_mode, |
---|
| 692 | &inode_xp, |
---|
| 693 | NULL ); |
---|
[23] | 694 | |
---|
[610] | 695 | // release lock protecting Inode Tree |
---|
| 696 | remote_rwlock_rd_release( lock_xp ); |
---|
[23] | 697 | |
---|
[610] | 698 | if( error ) |
---|
| 699 | { |
---|
| 700 | printk("\n[ERROR] in %s : cannot get inode <%s>\n", |
---|
| 701 | __FUNCTION__ , path ); |
---|
| 702 | return -1; |
---|
| 703 | } |
---|
| 704 | |
---|
[23] | 705 | // get target inode cluster and local pointer |
---|
| 706 | inode_cxy = GET_CXY( inode_xp ); |
---|
[473] | 707 | inode_ptr = GET_PTR( inode_xp ); |
---|
[23] | 708 | |
---|
[610] | 709 | #if (DEBUG_VFS_OPEN & 1) |
---|
| 710 | cycle = (uint32_t)hal_get_cycles(); |
---|
| 711 | if( DEBUG_VFS_OPEN < cycle ) |
---|
| 712 | printk("\n[%s] thread[%x,%x] found inode(%x,%x) for <%s>\n", |
---|
| 713 | __FUNCTION__, process->pid, this->trdid, inode_cxy, inode_ptr, path ); |
---|
| 714 | #endif |
---|
| 715 | |
---|
[23] | 716 | // create a new file descriptor in cluster containing inode |
---|
| 717 | if( inode_cxy == local_cxy ) // target cluster is local |
---|
[1] | 718 | { |
---|
[23] | 719 | error = vfs_file_create( inode_ptr , file_attr , &file_xp ); |
---|
[1] | 720 | } |
---|
[23] | 721 | else // target cluster is remote |
---|
| 722 | { |
---|
| 723 | rpc_vfs_file_create_client( inode_cxy , inode_ptr , file_attr , &file_xp , &error ); |
---|
| 724 | } |
---|
[1] | 725 | |
---|
[23] | 726 | if( error ) return error; |
---|
[1] | 727 | |
---|
[610] | 728 | #if (DEBUG_VFS_OPEN & 1) |
---|
| 729 | cycle = (uint32_t)hal_get_cycles(); |
---|
| 730 | if( DEBUG_VFS_OPEN < cycle ) |
---|
| 731 | printk("\n[%s] thread[%x,%x] created file descriptor (%x,%x) for <%s>\n", |
---|
| 732 | __FUNCTION__, process->pid, this->trdid, GET_CXY(file_xp), GET_PTR(file_xp), path ); |
---|
| 733 | #endif |
---|
| 734 | |
---|
[407] | 735 | // allocate and register a new file descriptor index in reference process |
---|
[610] | 736 | error = process_fd_register( process_xp , file_xp , &file_id ); |
---|
[1] | 737 | |
---|
[23] | 738 | if( error ) return error; |
---|
[1] | 739 | |
---|
[438] | 740 | #if DEBUG_VFS_OPEN |
---|
[433] | 741 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 742 | if( DEBUG_VFS_OPEN < cycle ) |
---|
[610] | 743 | printk("\n[%s] thread[%x,%x] exit for <%s> / fdid %d / cluster %x / cycle %d\n", |
---|
| 744 | __FUNCTION__, process->pid, this->trdid, path, file_id, GET_CXY( file_xp ), cycle ); |
---|
[433] | 745 | #endif |
---|
[238] | 746 | |
---|
[23] | 747 | // success |
---|
| 748 | *new_file_xp = file_xp; |
---|
| 749 | *new_file_id = file_id; |
---|
| 750 | return 0; |
---|
[1] | 751 | |
---|
[23] | 752 | } // end vfs_open() |
---|
| 753 | |
---|
[407] | 754 | ////////////////////////////////////// |
---|
| 755 | int vfs_user_move( bool_t to_buffer, |
---|
| 756 | xptr_t file_xp, |
---|
| 757 | void * buffer, |
---|
| 758 | uint32_t size ) |
---|
[23] | 759 | { |
---|
| 760 | cxy_t file_cxy; // remote file descriptor cluster |
---|
| 761 | vfs_file_t * file_ptr; // remote file descriptor local pointer |
---|
| 762 | vfs_inode_type_t inode_type; |
---|
| 763 | uint32_t file_offset; // current offset in file |
---|
| 764 | mapper_t * mapper; |
---|
| 765 | error_t error; |
---|
| 766 | |
---|
[602] | 767 | // check argument |
---|
| 768 | assert( (file_xp != XPTR_NULL), "file_xp == XPTR_NULL\n" ); |
---|
| 769 | |
---|
[23] | 770 | // get cluster and local pointer on remote file descriptor |
---|
| 771 | file_cxy = GET_CXY( file_xp ); |
---|
[473] | 772 | file_ptr = GET_PTR( file_xp ); |
---|
[23] | 773 | |
---|
| 774 | // get inode type from remote file descriptor |
---|
[568] | 775 | inode_type = hal_remote_l32( XPTR( file_cxy , &file_ptr->type ) ); |
---|
[23] | 776 | |
---|
[602] | 777 | // check inode type |
---|
| 778 | assert( (inode_type == INODE_TYPE_FILE), "inode type is not INODE_TYPE_FILE" ); |
---|
[23] | 779 | |
---|
[407] | 780 | // get mapper pointer and file offset from file descriptor |
---|
[568] | 781 | file_offset = hal_remote_l32( XPTR( file_cxy , &file_ptr->offset ) ); |
---|
[407] | 782 | mapper = (mapper_t *)hal_remote_lpt( XPTR( file_cxy , &file_ptr->mapper ) ); |
---|
[23] | 783 | |
---|
[407] | 784 | // move data between mapper and buffer |
---|
[610] | 785 | error = mapper_move_user( XPTR( file_cxy , mapper ), |
---|
| 786 | to_buffer, |
---|
| 787 | file_offset, |
---|
| 788 | buffer, |
---|
| 789 | size ); |
---|
[407] | 790 | |
---|
[602] | 791 | // update file offset in file descriptor |
---|
| 792 | hal_remote_atomic_add( XPTR( file_cxy , &file_ptr->offset ) , size ); |
---|
[407] | 793 | |
---|
[602] | 794 | if( error ) |
---|
| 795 | { |
---|
| 796 | return -1; |
---|
| 797 | } |
---|
| 798 | |
---|
| 799 | return size; |
---|
| 800 | |
---|
[313] | 801 | } // end vfs_user_move() |
---|
[23] | 802 | |
---|
[317] | 803 | //////////////////////////////////////////// |
---|
| 804 | error_t vfs_kernel_move( bool_t to_buffer, |
---|
| 805 | xptr_t file_xp, |
---|
| 806 | xptr_t buffer_xp, |
---|
| 807 | uint32_t size ) |
---|
| 808 | { |
---|
| 809 | cxy_t file_cxy; // remote file descriptor cluster |
---|
| 810 | vfs_file_t * file_ptr; // remote file descriptor local pointer |
---|
[602] | 811 | vfs_inode_type_t inode_type; // remote file type |
---|
[317] | 812 | uint32_t file_offset; // current offset in file |
---|
[602] | 813 | mapper_t * mapper_ptr; // remote mapper local pointer |
---|
| 814 | xptr_t mapper_xp; // remote mapper extended pointer |
---|
[317] | 815 | error_t error; |
---|
| 816 | |
---|
[602] | 817 | // check argument |
---|
| 818 | assert( (file_xp != XPTR_NULL) , "file_xp == XPTR_NULL\n" ); |
---|
| 819 | |
---|
[317] | 820 | // get cluster and local pointer on remote file descriptor |
---|
| 821 | file_cxy = GET_CXY( file_xp ); |
---|
[473] | 822 | file_ptr = GET_PTR( file_xp ); |
---|
[317] | 823 | |
---|
| 824 | // get inode type from remote file descriptor |
---|
[568] | 825 | inode_type = hal_remote_l32( XPTR( file_cxy , &file_ptr->type ) ); |
---|
[610] | 826 | |
---|
[317] | 827 | // action depends on inode type |
---|
| 828 | if( inode_type == INODE_TYPE_FILE ) |
---|
| 829 | { |
---|
[602] | 830 | // get mapper pointers and file offset from file descriptor |
---|
[568] | 831 | file_offset = hal_remote_l32( XPTR( file_cxy , &file_ptr->offset ) ); |
---|
[602] | 832 | mapper_ptr = hal_remote_lpt( XPTR( file_cxy , &file_ptr->mapper ) ); |
---|
| 833 | mapper_xp = XPTR( file_cxy , mapper_ptr ); |
---|
[317] | 834 | |
---|
| 835 | // move data between mapper and buffer |
---|
[602] | 836 | error = mapper_move_kernel( mapper_xp, |
---|
| 837 | to_buffer, |
---|
| 838 | file_offset, |
---|
| 839 | buffer_xp, |
---|
| 840 | size ); |
---|
[317] | 841 | if( error ) return -1; |
---|
| 842 | } |
---|
| 843 | else |
---|
| 844 | { |
---|
| 845 | printk("\n[ERROR] in %s : inode is not a file", __FUNCTION__ ); |
---|
| 846 | return -1; |
---|
| 847 | } |
---|
[602] | 848 | |
---|
| 849 | return 0; |
---|
| 850 | |
---|
[317] | 851 | } // end vfs_kernel_move() |
---|
| 852 | |
---|
[23] | 853 | ////////////////////////////////////// |
---|
| 854 | error_t vfs_lseek( xptr_t file_xp, |
---|
| 855 | uint32_t offset, |
---|
| 856 | uint32_t whence, |
---|
| 857 | uint32_t * new_offset ) |
---|
| 858 | { |
---|
[266] | 859 | xptr_t offset_xp; |
---|
| 860 | xptr_t lock_xp; |
---|
[602] | 861 | xptr_t size_xp; |
---|
[266] | 862 | cxy_t file_cxy; |
---|
| 863 | vfs_file_t * file_ptr; |
---|
| 864 | vfs_inode_t * inode_ptr; |
---|
| 865 | uint32_t new; |
---|
| 866 | |
---|
[602] | 867 | // check argument |
---|
| 868 | assert( (file_xp != XPTR_NULL) , "file_xp == XPTR_NULL\n" ); |
---|
[266] | 869 | |
---|
| 870 | // get cluster and local pointer on remote file descriptor |
---|
| 871 | file_cxy = GET_CXY( file_xp ); |
---|
[473] | 872 | file_ptr = GET_PTR( file_xp ); |
---|
[266] | 873 | |
---|
[602] | 874 | // get local pointer on remote inode |
---|
| 875 | inode_ptr = (vfs_inode_t *)hal_remote_lpt( XPTR( file_cxy , &file_ptr->inode ) ); |
---|
| 876 | |
---|
| 877 | // build extended pointers on lock, offset and size |
---|
[266] | 878 | offset_xp = XPTR( file_cxy , &file_ptr->offset ); |
---|
| 879 | lock_xp = XPTR( file_cxy , &file_ptr->lock ); |
---|
[602] | 880 | size_xp = XPTR( file_cxy , &inode_ptr->size ); |
---|
[266] | 881 | |
---|
| 882 | // take file descriptor lock |
---|
[568] | 883 | remote_rwlock_wr_acquire( lock_xp ); |
---|
[266] | 884 | |
---|
| 885 | if ( whence == SEEK_CUR ) // new = current + offset |
---|
| 886 | { |
---|
[568] | 887 | new = hal_remote_l32( offset_xp ) + offset; |
---|
[266] | 888 | } |
---|
| 889 | else if ( whence == SEEK_SET ) // new = offset |
---|
| 890 | { |
---|
| 891 | new = offset; |
---|
| 892 | } |
---|
| 893 | else if ( whence == SEEK_END ) // new = size + offset |
---|
| 894 | { |
---|
[602] | 895 | new = hal_remote_l32( size_xp ) + offset; |
---|
[266] | 896 | } |
---|
| 897 | else |
---|
| 898 | { |
---|
| 899 | printk("\n[ERROR] in %s : illegal whence value\n", __FUNCTION__ ); |
---|
[568] | 900 | remote_rwlock_wr_release( lock_xp ); |
---|
[266] | 901 | return -1; |
---|
| 902 | } |
---|
| 903 | |
---|
[602] | 904 | #if DEBUG_VFS_LSEEK |
---|
| 905 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
| 906 | thread_t * this = CURRENT_THREAD; |
---|
| 907 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 908 | vfs_inode_get_name( XPTR( file_cxy , inode_ptr ) , name ); |
---|
| 909 | if( cycle > DEBUG_VFS_LSEEK ) |
---|
| 910 | printk("\n[%s] thread[%x,%x] for <%s> / new offset %d / cycle %d\n", |
---|
| 911 | __FUNCTION__ , this->process->pid, this->trdid, name, new, cycle ); |
---|
| 912 | #endif |
---|
| 913 | |
---|
[266] | 914 | // set new offset |
---|
[568] | 915 | hal_remote_s32( offset_xp , new ); |
---|
[266] | 916 | |
---|
| 917 | // release file descriptor lock |
---|
[568] | 918 | remote_rwlock_wr_release( lock_xp ); |
---|
[266] | 919 | |
---|
| 920 | // success |
---|
[602] | 921 | if ( new_offset != NULL ) *new_offset = new; |
---|
[1] | 922 | return 0; |
---|
| 923 | |
---|
[23] | 924 | } // vfs_lseek() |
---|
| 925 | |
---|
[623] | 926 | //////////////////////////////////// |
---|
[23] | 927 | error_t vfs_close( xptr_t file_xp, |
---|
| 928 | uint32_t file_id ) |
---|
[1] | 929 | { |
---|
[623] | 930 | cxy_t file_cxy; // cluster containing the file descriptor. |
---|
| 931 | vfs_file_t * file_ptr; // local ponter on file descriptor |
---|
| 932 | cxy_t owner_cxy; // process owner cluster |
---|
| 933 | pid_t pid; // process identifier |
---|
| 934 | lpid_t lpid; // process local index |
---|
| 935 | xptr_t root_xp; // root of xlist (processes , or dentries) |
---|
| 936 | xptr_t lock_xp; // lock protecting the xlist |
---|
| 937 | xptr_t iter_xp; // iterator on xlist |
---|
| 938 | mapper_t * mapper_ptr; // local pointer on associated mapper |
---|
| 939 | xptr_t mapper_xp; // extended pointer on mapper |
---|
| 940 | vfs_inode_t * inode_ptr; // local pointer on associated inode |
---|
| 941 | xptr_t inode_xp; // extended pointer on inode |
---|
| 942 | uint32_t size; // current file size (from inode descriptor) |
---|
| 943 | error_t error; |
---|
[459] | 944 | |
---|
[623] | 945 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; // file name |
---|
[23] | 946 | |
---|
[623] | 947 | // check argument |
---|
| 948 | assert( (file_xp != XPTR_NULL) , "file_xp is XPTR_NULL\n" ); |
---|
| 949 | |
---|
[23] | 950 | thread_t * this = CURRENT_THREAD; |
---|
| 951 | process_t * process = this->process; |
---|
[623] | 952 | cluster_t * cluster = LOCAL_CLUSTER; |
---|
[23] | 953 | |
---|
[623] | 954 | // get file name |
---|
| 955 | vfs_file_get_name( file_xp , name ); |
---|
| 956 | |
---|
[459] | 957 | #if DEBUG_VFS_CLOSE |
---|
| 958 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
| 959 | if( DEBUG_VFS_CLOSE < cycle ) |
---|
[623] | 960 | printk("\n[%s] thread[%x,%x] enter for <%s> / cycle %d\n", |
---|
| 961 | __FUNCTION__, process->pid, this->trdid, name, cycle ); |
---|
[459] | 962 | #endif |
---|
[1] | 963 | |
---|
[623] | 964 | // get cluster and local pointer on remote file descriptor |
---|
| 965 | file_cxy = GET_CXY( file_xp ); |
---|
| 966 | file_ptr = GET_PTR( file_xp ); |
---|
[23] | 967 | |
---|
[623] | 968 | //////// 1) update all dirty pages from mapper to device |
---|
[23] | 969 | |
---|
[623] | 970 | // get pointers on mapper associated to file |
---|
| 971 | mapper_ptr = hal_remote_lpt( XPTR( file_cxy , &file_ptr->mapper ) ); |
---|
| 972 | mapper_xp = XPTR( file_cxy , mapper_ptr ); |
---|
[23] | 973 | |
---|
[623] | 974 | // copy all dirty pages from mapper to device |
---|
| 975 | if( file_cxy == local_cxy ) |
---|
| 976 | { |
---|
| 977 | error = mapper_sync( mapper_ptr ); |
---|
| 978 | } |
---|
| 979 | else |
---|
| 980 | { |
---|
| 981 | rpc_mapper_sync_client( file_cxy, |
---|
| 982 | mapper_ptr, |
---|
| 983 | &error ); |
---|
| 984 | } |
---|
[459] | 985 | |
---|
[623] | 986 | if( error ) |
---|
| 987 | { |
---|
| 988 | printk("\n[ERROR] in %s : cannot synchronise dirty pages for <%s>\n", |
---|
| 989 | __FUNCTION__, name ); |
---|
| 990 | return -1; |
---|
| 991 | } |
---|
[23] | 992 | |
---|
[623] | 993 | #if DEBUG_VFS_CLOSE |
---|
| 994 | if( DEBUG_VFS_CLOSE < cycle ) |
---|
| 995 | printk("\n[%s] thread[%x,%x] synchronised mapper of <%s> to device\n", |
---|
| 996 | __FUNCTION__, process->pid, this->trdid, name ); |
---|
| 997 | #endif |
---|
| 998 | |
---|
| 999 | //////// 2) update file size in all parent directory mapper(s) and on device |
---|
| 1000 | |
---|
| 1001 | // get pointers on remote inode |
---|
| 1002 | inode_ptr = hal_remote_lpt( XPTR( file_cxy , &file_ptr->inode ) ); |
---|
| 1003 | inode_xp = XPTR( file_cxy , inode_ptr ); |
---|
| 1004 | |
---|
| 1005 | // get file size from remote inode |
---|
| 1006 | size = hal_remote_l32( XPTR( file_cxy , &inode_ptr->size ) ); |
---|
| 1007 | |
---|
| 1008 | // get root of list of parents dentry |
---|
| 1009 | root_xp = XPTR( file_cxy , &inode_ptr->parents ); |
---|
| 1010 | |
---|
| 1011 | // loop on all parents |
---|
[23] | 1012 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
[1] | 1013 | { |
---|
[623] | 1014 | // get pointers on parent directory dentry |
---|
| 1015 | xptr_t parent_dentry_xp = XLIST_ELEMENT( iter_xp , vfs_dentry_t , parents ); |
---|
| 1016 | cxy_t parent_cxy = GET_CXY( parent_dentry_xp ); |
---|
| 1017 | vfs_dentry_t * parent_dentry_ptr = GET_PTR( parent_dentry_xp ); |
---|
[1] | 1018 | |
---|
[623] | 1019 | // get local pointer on parent directory inode |
---|
| 1020 | vfs_inode_t * parent_inode_ptr = hal_remote_lpt( XPTR( parent_cxy, |
---|
| 1021 | &parent_dentry_ptr->parent ) ); |
---|
| 1022 | |
---|
| 1023 | // get local pointer on parent directory mapper |
---|
| 1024 | mapper_t * parent_mapper_ptr = hal_remote_lpt( XPTR( parent_cxy, |
---|
| 1025 | &parent_inode_ptr->mapper ) ); |
---|
| 1026 | |
---|
| 1027 | // update dentry size in parent directory mapper |
---|
| 1028 | if( parent_cxy == local_cxy ) |
---|
| 1029 | { |
---|
| 1030 | error = vfs_fs_update_dentry( parent_inode_ptr, |
---|
| 1031 | parent_dentry_ptr, |
---|
| 1032 | size ); |
---|
| 1033 | } |
---|
| 1034 | else |
---|
| 1035 | { |
---|
| 1036 | rpc_vfs_fs_update_dentry_client( parent_cxy, |
---|
| 1037 | parent_inode_ptr, |
---|
| 1038 | parent_dentry_ptr, |
---|
| 1039 | size, |
---|
| 1040 | &error ); |
---|
| 1041 | } |
---|
| 1042 | |
---|
| 1043 | if( error ) |
---|
| 1044 | { |
---|
| 1045 | printk("\n[ERROR] in %s : cannot update size in parent\n", |
---|
| 1046 | __FUNCTION__ ); |
---|
| 1047 | return -1; |
---|
| 1048 | } |
---|
| 1049 | |
---|
| 1050 | #if DEBUG_VFS_CLOSE |
---|
| 1051 | char parent_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 1052 | vfs_inode_get_name( XPTR( parent_cxy , parent_inode_ptr ) , parent_name ); |
---|
[459] | 1053 | if( DEBUG_VFS_CLOSE < cycle ) |
---|
[623] | 1054 | printk("\n[%s] thread[%x,%x] updated size of <%s> in parent <%s>\n", |
---|
| 1055 | __FUNCTION__, process->pid, this->trdid, name, parent_name ); |
---|
[459] | 1056 | #endif |
---|
[23] | 1057 | |
---|
[623] | 1058 | // copy all dirty pages from parent mapper to device |
---|
| 1059 | if( parent_cxy == local_cxy ) |
---|
| 1060 | { |
---|
| 1061 | error = mapper_sync( parent_mapper_ptr ); |
---|
| 1062 | } |
---|
| 1063 | else |
---|
| 1064 | { |
---|
| 1065 | rpc_mapper_sync_client( parent_cxy, |
---|
| 1066 | parent_mapper_ptr, |
---|
| 1067 | &error ); |
---|
| 1068 | } |
---|
[459] | 1069 | |
---|
[623] | 1070 | if( error ) |
---|
| 1071 | { |
---|
| 1072 | printk("\n[ERROR] in %s : cannot synchronise parent mapper to device\n", |
---|
| 1073 | __FUNCTION__ ); |
---|
| 1074 | return -1; |
---|
| 1075 | } |
---|
[459] | 1076 | |
---|
[623] | 1077 | #if DEBUG_VFS_CLOSE |
---|
| 1078 | if( DEBUG_VFS_CLOSE < cycle ) |
---|
| 1079 | printk("\n[%s] thread[%x,%x] synchonized mapper of parent <%s> to device\n", |
---|
| 1080 | __FUNCTION__, process->pid, this->trdid, parent_name ); |
---|
| 1081 | #endif |
---|
[459] | 1082 | |
---|
[623] | 1083 | } |
---|
| 1084 | |
---|
| 1085 | //////// 3) loop on the process copies to reset all fd_array[file_id] entries |
---|
| 1086 | |
---|
| 1087 | // get owner process cluster and lpid |
---|
| 1088 | pid = process->pid; |
---|
| 1089 | owner_cxy = CXY_FROM_PID( pid ); |
---|
| 1090 | lpid = LPID_FROM_PID( pid ); |
---|
| 1091 | |
---|
| 1092 | // get extended pointers on copies root and lock |
---|
| 1093 | root_xp = XPTR( owner_cxy , &cluster->pmgr.copies_root[lpid] ); |
---|
| 1094 | lock_xp = XPTR( owner_cxy , &cluster->pmgr.copies_lock[lpid] ); |
---|
| 1095 | |
---|
| 1096 | // take the lock protecting the list of copies |
---|
| 1097 | remote_queuelock_acquire( lock_xp ); |
---|
| 1098 | |
---|
| 1099 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
| 1100 | { |
---|
| 1101 | xptr_t process_xp = XLIST_ELEMENT( iter_xp , process_t , copies_list ); |
---|
| 1102 | cxy_t process_cxy = GET_CXY( process_xp ); |
---|
| 1103 | process_t * process_ptr = GET_PTR( process_xp ); |
---|
| 1104 | |
---|
| 1105 | xptr_t entry_xp = XPTR( process_cxy , &process_ptr->fd_array.array[file_id] ); |
---|
[568] | 1106 | hal_remote_s64( entry_xp , XPTR_NULL ); |
---|
[459] | 1107 | vfs_file_count_down( file_xp ); |
---|
[124] | 1108 | hal_fence(); |
---|
[23] | 1109 | } |
---|
| 1110 | |
---|
[459] | 1111 | // release the lock protecting the list of copies |
---|
[568] | 1112 | remote_queuelock_release( lock_xp ); |
---|
[459] | 1113 | |
---|
[623] | 1114 | #if DEBUG_VFS_CLOSE |
---|
[459] | 1115 | if( DEBUG_VFS_CLOSE < cycle ) |
---|
[623] | 1116 | printk("\n[%s] thread[%x,%x] reset all fd-array copies for <%x>\n", |
---|
| 1117 | __FUNCTION__, process->pid, this->trdid, name ); |
---|
[459] | 1118 | #endif |
---|
| 1119 | |
---|
[623] | 1120 | //////// 4) release memory allocated to file descriptor in remote cluster |
---|
[459] | 1121 | |
---|
[23] | 1122 | if( file_cxy == local_cxy ) // file cluster is local |
---|
[1] | 1123 | { |
---|
[23] | 1124 | vfs_file_destroy( file_ptr ); |
---|
| 1125 | } |
---|
| 1126 | else // file cluster is local |
---|
| 1127 | { |
---|
| 1128 | rpc_vfs_file_destroy_client( file_cxy , file_ptr ); |
---|
| 1129 | } |
---|
[1] | 1130 | |
---|
[459] | 1131 | #if DEBUG_VFS_CLOSE |
---|
| 1132 | cycle = (uint32_t)hal_get_cycles(); |
---|
| 1133 | if( DEBUG_VFS_CLOSE < cycle ) |
---|
[623] | 1134 | printk("\n[%s] thread[%x,%x] exit / <%s> closed / cycle %d\n", |
---|
| 1135 | __FUNCTION__, process->pid, this->trdid, name, cycle ); |
---|
[459] | 1136 | #endif |
---|
| 1137 | |
---|
[23] | 1138 | return 0; |
---|
[1] | 1139 | |
---|
[23] | 1140 | } // end vfs_close() |
---|
[1] | 1141 | |
---|
| 1142 | //////////////////////////////////// |
---|
[610] | 1143 | error_t vfs_mkdir( xptr_t root_xp, |
---|
| 1144 | char * path, |
---|
| 1145 | uint32_t rights ) |
---|
| 1146 | { |
---|
| 1147 | error_t error; |
---|
| 1148 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
| 1149 | vfs_inode_t * vfs_root_ptr; // local pointer on VFS root inode |
---|
| 1150 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
| 1151 | xptr_t lock_xp; // extended pointer on lock protecting Inode Tree |
---|
[611] | 1152 | xptr_t inode_xp; // extended pointer on new directory inode |
---|
| 1153 | vfs_inode_t * inode_ptr; // local pointer on new directory inode |
---|
| 1154 | cxy_t inode_cxy; // new directory inode cluster identifier |
---|
[610] | 1155 | xptr_t dentry_xp; // extended pointer on new dentry |
---|
[611] | 1156 | vfs_dentry_t * dentry_ptr; // new dentry local pointer |
---|
| 1157 | xptr_t parent_xp; // extended pointer on parent inode |
---|
| 1158 | vfs_inode_t * parent_ptr; // local pointer on parent inode |
---|
| 1159 | cxy_t parent_cxy; // parent inode cluster identifier |
---|
| 1160 | vfs_ctx_t * parent_ctx_ptr; // local pointer on parent inode context |
---|
| 1161 | uint32_t parent_fs_type; // parent inode file system type |
---|
[610] | 1162 | |
---|
| 1163 | xptr_t parents_root_xp; // extended pointer on parents field in inode (root) |
---|
| 1164 | xptr_t parents_entry_xp; // extended pointer on parents field in dentry |
---|
| 1165 | xptr_t children_xhtab_xp; // extended pointer on children field in inode (root) |
---|
| 1166 | xptr_t children_entry_xp; // extended pointer on children field in dentry |
---|
| 1167 | |
---|
| 1168 | char last_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 1169 | |
---|
| 1170 | thread_t * this = CURRENT_THREAD; |
---|
| 1171 | process_t * process = this->process; |
---|
| 1172 | |
---|
| 1173 | #if DEBUG_VFS_MKDIR |
---|
| 1174 | char root_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 1175 | vfs_inode_get_name( root_xp , root_name ); |
---|
| 1176 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
| 1177 | if( DEBUG_VFS_MKDIR < cycle ) |
---|
| 1178 | printk("\n[%s] thread[%x,%x] enter / root <%s> / path <%s> / cycle %d\n", |
---|
| 1179 | __FUNCTION__, process->pid, this->trdid, root_name, path, cycle ); |
---|
| 1180 | #endif |
---|
| 1181 | |
---|
| 1182 | // build extended pointer on lock protecting Inode Tree (in VFS root inode) |
---|
| 1183 | vfs_root_xp = process->vfs_root_xp; |
---|
| 1184 | vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
| 1185 | vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
| 1186 | lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
| 1187 | |
---|
| 1188 | // take the lock protecting Inode Tree in write mode |
---|
| 1189 | remote_rwlock_wr_acquire( lock_xp ); |
---|
| 1190 | |
---|
| 1191 | // 1. get pointers on parent inode |
---|
| 1192 | error = vfs_lookup( root_xp, |
---|
| 1193 | path, |
---|
| 1194 | VFS_LOOKUP_DIR | VFS_LOOKUP_PARENT, |
---|
| 1195 | &parent_xp, |
---|
| 1196 | last_name ); |
---|
| 1197 | if( error ) |
---|
| 1198 | { |
---|
| 1199 | remote_rwlock_wr_release( lock_xp ); |
---|
| 1200 | printk("\n[ERROR] in %s : cannot get parent inode for <%s>\n", |
---|
| 1201 | __FUNCTION__, path ); |
---|
| 1202 | return -1; |
---|
| 1203 | } |
---|
| 1204 | |
---|
| 1205 | // get parent inode cluster and local pointer |
---|
| 1206 | parent_cxy = GET_CXY( parent_xp ); |
---|
| 1207 | parent_ptr = GET_PTR( parent_xp ); |
---|
| 1208 | |
---|
| 1209 | #if( DEBUG_VFS_MKDIR & 1 ) |
---|
| 1210 | if( DEBUG_VFS_MKDIR < cycle ) |
---|
| 1211 | printk("\n[%s] thread[%x,%x] get parent inode (%x,%x) for <%s>\n", |
---|
| 1212 | __FUNCTION__, process->pid, this->trdid, parent_cxy, parent_ptr, path ); |
---|
| 1213 | #endif |
---|
| 1214 | |
---|
| 1215 | // get parent inode context, and FS type |
---|
| 1216 | parent_ctx_ptr = hal_remote_lpt( XPTR( parent_cxy , &parent_ptr->ctx ) ); |
---|
| 1217 | parent_fs_type = hal_remote_l32( XPTR( parent_cxy , &parent_ctx_ptr->type ) ); |
---|
| 1218 | |
---|
| 1219 | // 2. create one new dentry in parent cluster |
---|
| 1220 | if( parent_cxy == local_cxy ) |
---|
| 1221 | { |
---|
| 1222 | error = vfs_dentry_create( parent_fs_type, |
---|
| 1223 | last_name, |
---|
| 1224 | &dentry_xp ); |
---|
| 1225 | } |
---|
| 1226 | else |
---|
| 1227 | { |
---|
| 1228 | rpc_vfs_dentry_create_client( parent_cxy, |
---|
| 1229 | parent_fs_type, |
---|
| 1230 | last_name, |
---|
| 1231 | &dentry_xp, |
---|
| 1232 | &error ); |
---|
| 1233 | } |
---|
| 1234 | |
---|
| 1235 | if( error ) |
---|
| 1236 | { |
---|
| 1237 | remote_rwlock_wr_release( lock_xp ); |
---|
| 1238 | printk("\n[ERROR] in %s : cannot create new dentry in cluster %x for <%s>\n", |
---|
| 1239 | __FUNCTION__, parent_cxy, path ); |
---|
| 1240 | return -1; |
---|
| 1241 | } |
---|
| 1242 | |
---|
| 1243 | // get local pointer on dentry |
---|
| 1244 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
| 1245 | |
---|
| 1246 | #if( DEBUG_VFS_MKDIR & 1 ) |
---|
| 1247 | if( DEBUG_VFS_MKDIR < cycle ) |
---|
| 1248 | printk("\n[%s] thread[%x,%x] created new dentry (%x,%x) for <%s>\n", |
---|
| 1249 | __FUNCTION__, process->pid, this->trdid, parent_cxy, dentry_ptr, path ); |
---|
| 1250 | #endif |
---|
| 1251 | |
---|
[611] | 1252 | // 3. create new directory inode |
---|
[610] | 1253 | // TODO : define attr / uid / gid |
---|
| 1254 | uint32_t attr = 0; |
---|
| 1255 | uint32_t uid = 0; |
---|
| 1256 | uint32_t gid = 0; |
---|
| 1257 | |
---|
| 1258 | // select a target cluster for new inode |
---|
| 1259 | inode_cxy = cluster_random_select(); |
---|
| 1260 | |
---|
[611] | 1261 | if( inode_cxy == local_cxy ) // target cluster is local |
---|
[610] | 1262 | { |
---|
| 1263 | error = vfs_inode_create( parent_fs_type, |
---|
| 1264 | attr, |
---|
| 1265 | rights, |
---|
| 1266 | uid, |
---|
| 1267 | gid, |
---|
| 1268 | &inode_xp ); |
---|
| 1269 | } |
---|
[611] | 1270 | else // target cluster is remote |
---|
[610] | 1271 | { |
---|
| 1272 | rpc_vfs_inode_create_client( inode_cxy, |
---|
| 1273 | parent_fs_type, |
---|
| 1274 | attr, |
---|
| 1275 | rights, |
---|
| 1276 | uid, |
---|
| 1277 | gid, |
---|
| 1278 | &inode_xp, |
---|
| 1279 | &error ); |
---|
| 1280 | } |
---|
| 1281 | |
---|
| 1282 | if( error ) |
---|
| 1283 | { |
---|
[611] | 1284 | remote_rwlock_wr_release( lock_xp ); |
---|
[610] | 1285 | printk("\n[ERROR] in %s : cannot create new inode in cluster %x for <%s>\n", |
---|
| 1286 | __FUNCTION__ , inode_cxy , path ); |
---|
| 1287 | if( parent_cxy == local_cxy ) vfs_dentry_destroy( dentry_ptr ); |
---|
| 1288 | else rpc_vfs_dentry_destroy_client( parent_cxy , dentry_ptr ); |
---|
| 1289 | return -1; |
---|
| 1290 | } |
---|
| 1291 | |
---|
| 1292 | // get new inode local pointer |
---|
| 1293 | inode_ptr = GET_PTR( inode_xp ); |
---|
[623] | 1294 | |
---|
| 1295 | // update inode "type" field |
---|
| 1296 | hal_remote_s32( XPTR( inode_cxy , &inode_ptr->type ) , INODE_TYPE_DIR ); |
---|
[610] | 1297 | |
---|
| 1298 | #if(DEBUG_VFS_MKDIR & 1) |
---|
| 1299 | if( DEBUG_VFS_MKDIR < cycle ) |
---|
| 1300 | printk("\n[%s] thread[%x,%x] created new inode (%x,%x) for <%s>\n", |
---|
| 1301 | __FUNCTION__ , process->pid, this->trdid, inode_cxy, inode_ptr, path ); |
---|
| 1302 | #endif |
---|
| 1303 | |
---|
| 1304 | // 4. register dentry in new inode list of parents |
---|
| 1305 | parents_root_xp = XPTR( inode_cxy , &inode_ptr->parents ); |
---|
| 1306 | parents_entry_xp = XPTR( parent_cxy , &dentry_ptr->parents ); |
---|
| 1307 | xlist_add_first( parents_root_xp , parents_entry_xp ); |
---|
| 1308 | hal_remote_atomic_add( XPTR( inode_cxy , &inode_ptr->links ) , 1 ); |
---|
| 1309 | |
---|
| 1310 | // 5. register dentry in parent inode |
---|
| 1311 | children_xhtab_xp = XPTR( parent_cxy , &parent_ptr->children ); |
---|
| 1312 | children_entry_xp = XPTR( parent_cxy , &dentry_ptr->children ); |
---|
| 1313 | xhtab_insert( children_xhtab_xp , last_name , children_entry_xp ); |
---|
| 1314 | |
---|
| 1315 | // 6. update "parent" and "child_xp" fields in dentry |
---|
| 1316 | hal_remote_s64( XPTR( parent_cxy , &dentry_ptr->child_xp ) , inode_xp ); |
---|
| 1317 | hal_remote_spt( XPTR( parent_cxy , &dentry_ptr->parent ) , parent_ptr ); |
---|
| 1318 | |
---|
| 1319 | #if(DEBUG_VFS_MKDIR & 1) |
---|
| 1320 | if( DEBUG_VFS_MKDIR < cycle ) |
---|
| 1321 | printk("\n[%s] thread[%x,%x] updated Inode Tree for <%s>\n", |
---|
| 1322 | __FUNCTION__, process->pid, this->trdid, path ); |
---|
| 1323 | #endif |
---|
| 1324 | |
---|
[611] | 1325 | // 7. create the two special dentries <.> and <..> in new directory |
---|
| 1326 | // both the new directory mapper, and the Inode Tree are updated |
---|
| 1327 | error = vfs_add_special_dentries( inode_xp, |
---|
| 1328 | parent_xp ); |
---|
| 1329 | |
---|
| 1330 | if( error ) |
---|
| 1331 | { |
---|
| 1332 | remote_rwlock_wr_release( lock_xp ); |
---|
| 1333 | printk("\n[ERROR] in %s : cannot create new inode in cluster %x for <%s>\n", |
---|
| 1334 | __FUNCTION__ , inode_cxy , path ); |
---|
| 1335 | if( parent_cxy == local_cxy ) vfs_dentry_destroy( dentry_ptr ); |
---|
| 1336 | else rpc_vfs_dentry_destroy_client( parent_cxy , dentry_ptr ); |
---|
| 1337 | return -1; |
---|
| 1338 | } |
---|
| 1339 | |
---|
[610] | 1340 | // release the lock protecting Inode Tree |
---|
| 1341 | remote_rwlock_wr_release( lock_xp ); |
---|
| 1342 | |
---|
[611] | 1343 | // 8. update parent directory mapper |
---|
[610] | 1344 | // and synchronize the parent directory on IOC device |
---|
| 1345 | if (parent_cxy == local_cxy) |
---|
| 1346 | { |
---|
| 1347 | error = vfs_fs_add_dentry( parent_ptr, |
---|
| 1348 | dentry_ptr ); |
---|
| 1349 | } |
---|
| 1350 | else |
---|
| 1351 | { |
---|
| 1352 | rpc_vfs_fs_add_dentry_client( parent_cxy, |
---|
| 1353 | parent_ptr, |
---|
| 1354 | dentry_ptr, |
---|
| 1355 | &error ); |
---|
| 1356 | } |
---|
| 1357 | |
---|
| 1358 | if( error ) |
---|
| 1359 | { |
---|
| 1360 | printk("\n[ERROR] in %s : cannot update parent directory for <%s>\n", |
---|
| 1361 | __FUNCTION__, path ); |
---|
| 1362 | return -1; |
---|
| 1363 | } |
---|
| 1364 | |
---|
| 1365 | #if(DEBUG_VFS_MKDIR & 1) |
---|
| 1366 | if( DEBUG_VFS_MKDIR < cycle ) |
---|
| 1367 | printk("\n[%s] thread[%x,%x] updated parent dir (mapper and IOC) for <%s>\n", |
---|
| 1368 | __FUNCTION__, process->pid, this->trdid, path ); |
---|
| 1369 | #endif |
---|
| 1370 | |
---|
| 1371 | return 0; |
---|
| 1372 | |
---|
| 1373 | } // end vfs_mkdir() |
---|
| 1374 | |
---|
| 1375 | /////////////////////////////////////// |
---|
| 1376 | error_t vfs_link( xptr_t old_root_xp, |
---|
| 1377 | char * old_path, |
---|
| 1378 | xptr_t new_root_xp, |
---|
| 1379 | char * new_path ) |
---|
| 1380 | { |
---|
| 1381 | error_t error; |
---|
| 1382 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
| 1383 | vfs_inode_t * vfs_root_ptr; // local pointer on VFS root inode |
---|
| 1384 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
| 1385 | xptr_t lock_xp; // extended pointer on lock protecting Inode Tree |
---|
| 1386 | xptr_t inode_xp; // extended pointer on target inode |
---|
| 1387 | vfs_inode_t * inode_ptr; // local pointer on target inode |
---|
| 1388 | cxy_t inode_cxy; // target inode cluster identifier |
---|
| 1389 | uint32_t inode_type; // target inode type |
---|
| 1390 | vfs_ctx_t * inode_ctx_ptr; // local pointer on target inode context |
---|
| 1391 | uint32_t inode_fs_type; // target inode file system type |
---|
| 1392 | xptr_t dentry_xp; // extended pointer on new dentry |
---|
| 1393 | vfs_dentry_t * dentry_ptr; // target dentry local pointer |
---|
| 1394 | xptr_t new_parent_xp; // extended pointer on new parent inode |
---|
| 1395 | vfs_inode_t * new_parent_ptr; // local pointer on new parent inode |
---|
| 1396 | cxy_t new_parent_cxy; // new parent inode cluster identifier |
---|
| 1397 | |
---|
| 1398 | xptr_t parents_root_xp; // extended pointer on parents field in inode (root) |
---|
| 1399 | xptr_t parents_entry_xp; // extended pointer on parents field in dentry |
---|
| 1400 | xptr_t children_xhtab_xp; // extended pointer on children field in inode (root) |
---|
| 1401 | xptr_t children_entry_xp; // extended pointer on children field in dentry |
---|
| 1402 | |
---|
| 1403 | char new_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 1404 | |
---|
| 1405 | thread_t * this = CURRENT_THREAD; |
---|
| 1406 | process_t * process = this->process; |
---|
| 1407 | |
---|
| 1408 | #if DEBUG_VFS_LINK |
---|
| 1409 | char old_root_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 1410 | char new_root_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 1411 | vfs_inode_get_name( old_root_xp , old_root_name ); |
---|
| 1412 | vfs_inode_get_name( new_root_xp , new_root_name ); |
---|
| 1413 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
| 1414 | if( DEBUG_VFS_LINK < cycle ) |
---|
| 1415 | printk("\n[%s] thread[%x,%x] enter / old_root <%s> / old_path <%s> / " |
---|
| 1416 | "new_root <%s> / new_path <%s> / cycle %d\n", |
---|
| 1417 | __FUNCTION__, process->pid, this->trdid, |
---|
| 1418 | old_root_name, old_path, new_root_name, new_path, cycle ); |
---|
| 1419 | #endif |
---|
| 1420 | |
---|
| 1421 | // build extended pointer on lock protecting Inode Tree (in VFS root inode) |
---|
| 1422 | vfs_root_xp = process->vfs_root_xp; |
---|
| 1423 | vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
| 1424 | vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
| 1425 | lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
| 1426 | |
---|
| 1427 | // take the lock protecting Inode Tree in write mode |
---|
| 1428 | remote_rwlock_wr_acquire( lock_xp ); |
---|
| 1429 | |
---|
| 1430 | // get extended pointer on target inode |
---|
| 1431 | error = vfs_lookup( old_root_xp, |
---|
| 1432 | old_path, |
---|
| 1433 | 0, |
---|
| 1434 | &inode_xp, |
---|
| 1435 | NULL ); |
---|
| 1436 | if( error ) |
---|
| 1437 | { |
---|
| 1438 | remote_rwlock_wr_release( lock_xp ); |
---|
| 1439 | printk("\n[ERROR] in %s : cannot get target inode for <%s>\n", |
---|
| 1440 | __FUNCTION__, old_path ); |
---|
| 1441 | return -1; |
---|
| 1442 | } |
---|
| 1443 | |
---|
| 1444 | #if( DEBUG_VFS_LINK & 1 ) |
---|
| 1445 | if( DEBUG_VFS_LINK < cycle ) |
---|
| 1446 | printk("\n[%s] thread[%x,%x] get child inode (%x,%x) for <%s>\n", |
---|
| 1447 | __FUNCTION__, process->pid, this->trdid, |
---|
| 1448 | GET_CXY(inode_xp), GET_PTR(inode_xp), old_path, cycle ); |
---|
| 1449 | #endif |
---|
| 1450 | |
---|
| 1451 | // get extended pointer on parent inode in new path |
---|
| 1452 | error = vfs_lookup( new_root_xp, |
---|
| 1453 | new_path, |
---|
| 1454 | VFS_LOOKUP_PARENT, |
---|
| 1455 | &new_parent_xp, |
---|
| 1456 | new_name ); |
---|
| 1457 | if( error ) |
---|
| 1458 | { |
---|
| 1459 | remote_rwlock_wr_release( lock_xp ); |
---|
| 1460 | printk("\n[ERROR] in %s : cannot get parent inode for <%s>\n", |
---|
| 1461 | __FUNCTION__, new_path ); |
---|
| 1462 | return -1; |
---|
| 1463 | } |
---|
| 1464 | |
---|
| 1465 | #if( DEBUG_VFS_LINK & 1 ) |
---|
| 1466 | if( DEBUG_VFS_LINK < cycle ) |
---|
| 1467 | printk("\n[%s] thread[%x,%x] get parent inode (%x,%x) for <%s>\n", |
---|
| 1468 | __FUNCTION__, process->pid, this->trdid, |
---|
| 1469 | GET_CXY(new_parent_xp), GET_PTR(new_parent_xp), new_path ); |
---|
| 1470 | #endif |
---|
| 1471 | |
---|
| 1472 | // get target inode cluster and local pointer |
---|
| 1473 | inode_cxy = GET_CXY( inode_xp ); |
---|
| 1474 | inode_ptr = GET_PTR( inode_xp ); |
---|
| 1475 | |
---|
| 1476 | // get target inode type, context, and FS type |
---|
| 1477 | inode_type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) ); |
---|
| 1478 | inode_ctx_ptr = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->ctx ) ); |
---|
| 1479 | inode_fs_type = hal_remote_l32( XPTR( inode_cxy , &inode_ctx_ptr->type ) ); |
---|
| 1480 | |
---|
| 1481 | // get new parent inode cluster an local pointer |
---|
| 1482 | new_parent_ptr = GET_PTR( new_parent_xp ); |
---|
| 1483 | new_parent_cxy = GET_CXY( new_parent_xp ); |
---|
| 1484 | |
---|
| 1485 | /////////////////////////////////////////////////////////////////////// |
---|
| 1486 | if( (inode_type == INODE_TYPE_FILE) || (inode_type == INODE_TYPE_DIR) ) |
---|
| 1487 | { |
---|
| 1488 | // 1. create one new dentry |
---|
| 1489 | if( new_parent_cxy == local_cxy ) |
---|
| 1490 | { |
---|
| 1491 | error = vfs_dentry_create( inode_fs_type, |
---|
| 1492 | new_name, |
---|
| 1493 | &dentry_xp ); |
---|
| 1494 | } |
---|
| 1495 | else |
---|
| 1496 | { |
---|
| 1497 | rpc_vfs_dentry_create_client( new_parent_cxy, |
---|
| 1498 | inode_fs_type, |
---|
| 1499 | new_name, |
---|
| 1500 | &dentry_xp, |
---|
| 1501 | &error ); |
---|
| 1502 | } |
---|
| 1503 | |
---|
| 1504 | if( error ) |
---|
| 1505 | { |
---|
| 1506 | remote_rwlock_wr_release( lock_xp ); |
---|
| 1507 | printk("\n[ERROR] in %s : cannot create new dentry for <%s>\n", |
---|
| 1508 | __FUNCTION__, new_path ); |
---|
| 1509 | return -1; |
---|
| 1510 | } |
---|
| 1511 | |
---|
| 1512 | // get local pointer on dentry |
---|
| 1513 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
| 1514 | |
---|
| 1515 | // 2. register dentry in target inode |
---|
| 1516 | parents_root_xp = XPTR( inode_cxy , &inode_ptr->parents ); |
---|
| 1517 | parents_entry_xp = XPTR( new_parent_cxy , &dentry_ptr->parents ); |
---|
| 1518 | xlist_add_first( parents_root_xp , parents_entry_xp ); |
---|
| 1519 | hal_remote_atomic_add( XPTR( inode_cxy , &inode_ptr->links ) , 1 ); |
---|
| 1520 | |
---|
| 1521 | // 3. register dentry in parent inode |
---|
| 1522 | children_xhtab_xp = XPTR( new_parent_cxy , &new_parent_ptr->children ); |
---|
| 1523 | children_entry_xp = XPTR( new_parent_cxy , &dentry_ptr->children ); |
---|
| 1524 | xhtab_insert( children_xhtab_xp , new_name , children_entry_xp ); |
---|
| 1525 | |
---|
| 1526 | // 4. update "parent" and "child_xp" fields in dentry |
---|
| 1527 | hal_remote_s64( XPTR( new_parent_cxy , &dentry_ptr->child_xp ) , inode_xp ); |
---|
| 1528 | hal_remote_spt( XPTR( new_parent_cxy , &dentry_ptr->parent ) , new_parent_ptr ); |
---|
| 1529 | |
---|
| 1530 | #if(DEBUG_VFS_LINK & 1) |
---|
| 1531 | if( DEBUG_VFS_LINK < cycle ) |
---|
| 1532 | printk("\n[%s] thread[%x,%x] updated Inode Tree / old <%s> / new <%s>\n", |
---|
| 1533 | __FUNCTION__, process->pid, this->trdid, old_path, new_path ); |
---|
| 1534 | vfs_display( new_parent_xp ); |
---|
| 1535 | #endif |
---|
| 1536 | |
---|
| 1537 | // release the lock protecting Inode Tree |
---|
| 1538 | remote_rwlock_wr_release( lock_xp ); |
---|
| 1539 | |
---|
| 1540 | // 5. update new parent directory mapper in Inode Tree |
---|
| 1541 | // and synchronize the parent directory on IOC device |
---|
| 1542 | if (new_parent_cxy == local_cxy) |
---|
| 1543 | { |
---|
| 1544 | error = vfs_fs_add_dentry( new_parent_ptr, |
---|
| 1545 | dentry_ptr ); |
---|
| 1546 | } |
---|
| 1547 | else |
---|
| 1548 | { |
---|
| 1549 | rpc_vfs_fs_add_dentry_client( new_parent_cxy, |
---|
| 1550 | new_parent_ptr, |
---|
| 1551 | dentry_ptr, |
---|
| 1552 | &error ); |
---|
| 1553 | } |
---|
| 1554 | if( error ) |
---|
| 1555 | { |
---|
| 1556 | printk("\n[ERROR] in %s : cannot update new parent directory for <%s>\n", |
---|
| 1557 | __FUNCTION__, new_path ); |
---|
| 1558 | return -1; |
---|
| 1559 | } |
---|
| 1560 | |
---|
| 1561 | #if(DEBUG_VFS_LINK & 1) |
---|
| 1562 | if( DEBUG_VFS_LINK < cycle ) |
---|
| 1563 | printk("\n[%s] thread[%x,%x] updated new parent dir (mapper and IOC) / old <%s> / new <%s>\n", |
---|
| 1564 | __FUNCTION__, process->pid, this->trdid, old_path, new_path ); |
---|
| 1565 | #endif |
---|
| 1566 | return 0; |
---|
| 1567 | } |
---|
| 1568 | else |
---|
| 1569 | { |
---|
| 1570 | // release the lock protecting Inode Tree |
---|
| 1571 | remote_rwlock_wr_release( lock_xp ); |
---|
| 1572 | |
---|
| 1573 | printk("\n[ERROR] in %s : unsupported inode type %s\n", |
---|
| 1574 | __FUNCTION__ , vfs_inode_type_str( inode_type ) ); |
---|
| 1575 | return -1; |
---|
| 1576 | } |
---|
| 1577 | |
---|
| 1578 | } // end vfs_link() |
---|
| 1579 | |
---|
| 1580 | ///////////////////////////////////// |
---|
| 1581 | error_t vfs_unlink( xptr_t root_xp, |
---|
[23] | 1582 | char * path ) |
---|
[1] | 1583 | { |
---|
[602] | 1584 | error_t error; |
---|
[610] | 1585 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
| 1586 | vfs_inode_t * vfs_root_ptr; // local_pointer on VFS root inode |
---|
| 1587 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
| 1588 | xptr_t lock_xp; // extended pointer on lock protecting Inode Tree |
---|
| 1589 | xptr_t parent_xp; // extended pointer on target inode |
---|
| 1590 | cxy_t parent_cxy; // target inode cluster identifier |
---|
| 1591 | vfs_inode_t * parent_ptr; // target inode local pointer |
---|
[602] | 1592 | xptr_t inode_xp; // extended pointer on target inode |
---|
| 1593 | cxy_t inode_cxy; // target inode cluster identifier |
---|
| 1594 | vfs_inode_t * inode_ptr; // target inode local pointer |
---|
[610] | 1595 | uint32_t inode_links; // target inode links count |
---|
| 1596 | vfs_inode_type_t inode_type; // target inode type |
---|
| 1597 | uint32_t inode_children; // target inode number of children |
---|
| 1598 | xptr_t dentry_xp; // extended pointer on dentry to unlink |
---|
| 1599 | vfs_dentry_t * dentry_ptr; // local pointer on dentry to unlink |
---|
[623] | 1600 | vfs_ctx_t * ctx_ptr; // local pointer on FS context |
---|
| 1601 | vfs_fs_type_t fs_type; // File system type |
---|
[1] | 1602 | |
---|
[610] | 1603 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; // name of link to remove |
---|
| 1604 | |
---|
| 1605 | thread_t * this = CURRENT_THREAD; |
---|
| 1606 | process_t * process = this->process; |
---|
| 1607 | |
---|
[602] | 1608 | #if DEBUG_VFS_UNLINK |
---|
| 1609 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[610] | 1610 | char root_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 1611 | vfs_inode_get_name( root_xp , root_name ); |
---|
[602] | 1612 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
[623] | 1613 | printk("\n[%s] thread[%x,%x] : enter for root <%s> / path <%s> / cycle %d\n", |
---|
[610] | 1614 | __FUNCTION__, process->pid, this->trdid, root_name, path, cycle ); |
---|
[602] | 1615 | #endif |
---|
| 1616 | |
---|
[610] | 1617 | // build extended pointer on lock protecting Inode Tree (in VFS root inode) |
---|
| 1618 | vfs_root_xp = process->vfs_root_xp; |
---|
| 1619 | vfs_root_ptr = GET_PTR( root_xp ); |
---|
| 1620 | vfs_root_cxy = GET_CXY( root_xp ); |
---|
| 1621 | lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
[602] | 1622 | |
---|
[610] | 1623 | // take the lock protecting Inode Tree |
---|
| 1624 | remote_rwlock_wr_acquire( lock_xp ); |
---|
[602] | 1625 | |
---|
[610] | 1626 | // get extended pointer on parent inode |
---|
| 1627 | error = vfs_lookup( root_xp, |
---|
| 1628 | path, |
---|
| 1629 | VFS_LOOKUP_PARENT, |
---|
| 1630 | &parent_xp, |
---|
| 1631 | name ); |
---|
| 1632 | if( error ) |
---|
| 1633 | { |
---|
| 1634 | remote_rwlock_wr_release( lock_xp ); |
---|
| 1635 | printk("\n[ERROR] in %s : cannot get parent inode for <%s> in <%s>\n", |
---|
| 1636 | __FUNCTION__, name, path ); |
---|
| 1637 | return -1; |
---|
| 1638 | } |
---|
| 1639 | |
---|
| 1640 | // get parent inode cluster and local pointer |
---|
| 1641 | parent_cxy = GET_CXY( parent_xp ); |
---|
| 1642 | parent_ptr = GET_PTR( parent_xp ); |
---|
| 1643 | |
---|
| 1644 | #if( DEBUG_VFS_UNLINK & 1 ) |
---|
| 1645 | char parent_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 1646 | vfs_inode_get_name( parent_xp , parent_name ); |
---|
| 1647 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
[623] | 1648 | printk("\n[%s] thread[%x,%x] : parent inode <%s> is (%x,%x)\n", |
---|
[610] | 1649 | __FUNCTION__, process->pid, this->trdid, parent_name, parent_cxy, parent_ptr ); |
---|
| 1650 | #endif |
---|
| 1651 | |
---|
| 1652 | // build extended pointer on parent inode "children" xhtab |
---|
| 1653 | xptr_t children_xp = XPTR( parent_cxy , &parent_ptr->children ); |
---|
| 1654 | |
---|
[623] | 1655 | // try to get extended pointer on dentry from Inode Tree |
---|
[610] | 1656 | dentry_xp = xhtab_lookup( children_xp , name ); |
---|
| 1657 | |
---|
[623] | 1658 | // when dentry not found in Inode Tree, try to get it from inode tree |
---|
| 1659 | |
---|
| 1660 | if( dentry_xp == XPTR_NULL ) // miss target dentry in Inode Tree |
---|
[610] | 1661 | { |
---|
| 1662 | |
---|
| 1663 | #if( DEBUG_VFS_UNLINK & 1 ) |
---|
| 1664 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
[623] | 1665 | printk("\n[%s] thread[%x,%x] : inode <%s> not found => scan parent mapper\n", |
---|
| 1666 | __FUNCTION__, process->pid, this->trdid, name ); |
---|
[610] | 1667 | #endif |
---|
[623] | 1668 | // get parent inode FS type |
---|
| 1669 | ctx_ptr = hal_remote_lpt( XPTR( parent_cxy , &parent_ptr->ctx ) ); |
---|
| 1670 | fs_type = hal_remote_l32( XPTR( parent_cxy , &ctx_ptr->type ) ); |
---|
[610] | 1671 | |
---|
[623] | 1672 | // select a cluster for new inode |
---|
| 1673 | inode_cxy = cluster_random_select(); |
---|
| 1674 | |
---|
| 1675 | // speculatively insert a new child dentry/inode couple in inode tree |
---|
| 1676 | error = vfs_add_child_in_parent( inode_cxy, |
---|
| 1677 | fs_type, |
---|
| 1678 | parent_xp, |
---|
| 1679 | name, |
---|
| 1680 | &dentry_xp, |
---|
| 1681 | &inode_xp ); |
---|
| 1682 | if( error ) |
---|
| 1683 | { |
---|
| 1684 | printk("\n[ERROR] in %s : cannot create inode <%s> in path <%s>\n", |
---|
| 1685 | __FUNCTION__ , name, path ); |
---|
| 1686 | |
---|
| 1687 | vfs_remove_child_from_parent( dentry_xp ); |
---|
| 1688 | return -1; |
---|
| 1689 | } |
---|
| 1690 | |
---|
| 1691 | // get local pointers on new dentry and new inode descriptors |
---|
| 1692 | inode_ptr = GET_PTR( inode_xp ); |
---|
| 1693 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
| 1694 | |
---|
| 1695 | // scan parent mapper to find the missing dentry, and complete |
---|
| 1696 | // initialisation of new dentry and new inode descriptors In Inode Tree |
---|
| 1697 | if( parent_cxy == local_cxy ) |
---|
| 1698 | { |
---|
| 1699 | error = vfs_fs_new_dentry( parent_ptr, |
---|
| 1700 | name, |
---|
| 1701 | inode_xp ); |
---|
| 1702 | } |
---|
| 1703 | else |
---|
| 1704 | { |
---|
| 1705 | rpc_vfs_fs_new_dentry_client( parent_cxy, |
---|
| 1706 | parent_ptr, |
---|
| 1707 | name, |
---|
| 1708 | inode_xp, |
---|
| 1709 | &error ); |
---|
| 1710 | } |
---|
| 1711 | |
---|
| 1712 | if ( error ) // dentry not found in parent mapper |
---|
| 1713 | { |
---|
| 1714 | printk("\n[ERROR] in %s : cannot get dentry <%s> in path <%s>\n", |
---|
| 1715 | __FUNCTION__ , name, path ); |
---|
| 1716 | return -1; |
---|
| 1717 | } |
---|
| 1718 | |
---|
| 1719 | #if (DEBUG_VFS_UNLINK & 1) |
---|
| 1720 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
| 1721 | printk("\n[%s] thread[%x,%x] : created missing inode & dentry <%s> in cluster %x\n", |
---|
| 1722 | __FUNCTION__, process->pid, this->trdid, name, inode_cxy ); |
---|
| 1723 | #endif |
---|
| 1724 | |
---|
| 1725 | } |
---|
| 1726 | else // found target dentry in Inode Tree |
---|
| 1727 | { |
---|
| 1728 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
| 1729 | |
---|
| 1730 | // get pointer on target inode from dentry |
---|
| 1731 | inode_xp = hal_remote_l64( XPTR( parent_cxy , &dentry_ptr->child_xp ) ); |
---|
| 1732 | inode_cxy = GET_CXY( inode_xp ); |
---|
| 1733 | inode_ptr = GET_PTR( inode_xp ); |
---|
| 1734 | } |
---|
| 1735 | |
---|
| 1736 | // At this point the Inode Tree contains the target dentry and child inode |
---|
| 1737 | // we can safely remove this dentry from both the parent mapper, and the Inode Tree. |
---|
| 1738 | |
---|
[610] | 1739 | #if( DEBUG_VFS_UNLINK & 1 ) |
---|
| 1740 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
[623] | 1741 | printk("\n[%s] thread[%x,%x] : dentry (%x,%x) / inode (%x,%x)\n", |
---|
| 1742 | __FUNCTION__, process->pid, this->trdid, parent_cxy, dentry_ptr, inode_cxy, inode_ptr ); |
---|
[610] | 1743 | #endif |
---|
[602] | 1744 | |
---|
[610] | 1745 | // get target inode "type" and "links" |
---|
| 1746 | inode_type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) ); |
---|
| 1747 | inode_links = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->links ) ); |
---|
[602] | 1748 | |
---|
[610] | 1749 | /////////////////////////////////////////////////////////////////////// |
---|
| 1750 | if( (inode_type == INODE_TYPE_FILE) || (inode_type == INODE_TYPE_DIR) ) |
---|
[602] | 1751 | { |
---|
[623] | 1752 | |
---|
| 1753 | #if( DEBUG_VFS_UNLINK & 1 ) |
---|
| 1754 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
| 1755 | printk("\n[%s] thread[%x,%x] : unlink inode <%s> / type %s / %d links\n", |
---|
| 1756 | __FUNCTION__, process->pid, this->trdid, name, vfs_inode_type_str(inode_type), inode_links ); |
---|
| 1757 | #endif |
---|
| 1758 | |
---|
[610] | 1759 | // 1. Release clusters allocated to target inode |
---|
| 1760 | // and synchronize the FAT on IOC device if last link. |
---|
| 1761 | if( inode_links == 1 ) |
---|
[602] | 1762 | { |
---|
[610] | 1763 | // build extended pointer on target inode "children" number |
---|
| 1764 | xptr_t inode_children_xp = XPTR( inode_cxy , &inode_ptr->children.items ); |
---|
[602] | 1765 | |
---|
[623] | 1766 | printk("\n@@@ in %s : children_xp = (%x,%x)\n", |
---|
| 1767 | __FUNCTION__, inode_cxy, &inode_ptr->children.items ); |
---|
| 1768 | |
---|
[610] | 1769 | // get target inode number of children |
---|
| 1770 | inode_children = hal_remote_l32( inode_children_xp ); |
---|
| 1771 | |
---|
| 1772 | // check no children |
---|
| 1773 | if( inode_children != 0 ) |
---|
| 1774 | { |
---|
| 1775 | remote_rwlock_wr_release( lock_xp ); |
---|
| 1776 | printk("\n[ERROR] in %s : cannot remove <%s> inode that has children\n", |
---|
| 1777 | __FUNCTION__, path ); |
---|
| 1778 | return -1; |
---|
| 1779 | } |
---|
| 1780 | |
---|
| 1781 | // release clusters on IOC device |
---|
| 1782 | error = vfs_fs_release_inode( inode_xp ); |
---|
| 1783 | |
---|
| 1784 | if( error ) |
---|
| 1785 | { |
---|
| 1786 | remote_rwlock_wr_release( lock_xp ); |
---|
| 1787 | printk("\n[ERROR] in %s : cannot update FAT mapper to remove <%s> inode\n", |
---|
| 1788 | __FUNCTION__ , path ); |
---|
| 1789 | return -1; |
---|
| 1790 | } |
---|
| 1791 | |
---|
[602] | 1792 | #if(DEBUG_VFS_UNLINK & 1) |
---|
| 1793 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
| 1794 | printk("\n[%s] thread[%x,%x] removed <%s> inode from FAT (mapper and IOC device)\n", |
---|
[610] | 1795 | __FUNCTION__, process->pid, this->trdid, path ); |
---|
[602] | 1796 | #endif |
---|
[610] | 1797 | } |
---|
[602] | 1798 | |
---|
[610] | 1799 | // 2. update parent directory mapper |
---|
| 1800 | // and synchronize the parent directory on IOC device |
---|
| 1801 | if (parent_cxy == local_cxy) |
---|
[602] | 1802 | { |
---|
[610] | 1803 | error = vfs_fs_remove_dentry( parent_ptr, |
---|
[602] | 1804 | dentry_ptr ); |
---|
| 1805 | } |
---|
[610] | 1806 | else |
---|
[602] | 1807 | { |
---|
[610] | 1808 | rpc_vfs_fs_remove_dentry_client( parent_cxy, |
---|
| 1809 | parent_ptr, |
---|
[602] | 1810 | dentry_ptr, |
---|
| 1811 | &error ); |
---|
| 1812 | } |
---|
[610] | 1813 | |
---|
[602] | 1814 | if( error ) |
---|
| 1815 | { |
---|
[610] | 1816 | remote_rwlock_wr_release( lock_xp ); |
---|
| 1817 | printk("\n[ERROR] in %s : cannot update dentry on device for <%s>\n", |
---|
| 1818 | __FUNCTION__ , path ); |
---|
[602] | 1819 | return -1; |
---|
| 1820 | } |
---|
| 1821 | |
---|
| 1822 | #if(DEBUG_VFS_UNLINK & 1) |
---|
| 1823 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
| 1824 | printk("\n[%s] thread[%x,%x] removed <%s> inode from parent dir (mapper and IOC device)\n", |
---|
[610] | 1825 | __FUNCTION__, process->pid, this->trdid, path ); |
---|
[602] | 1826 | #endif |
---|
[610] | 1827 | // 3. remove dentry from Inode Tree (and associated chils inode when last link) |
---|
| 1828 | vfs_remove_child_from_parent( dentry_xp ); |
---|
[602] | 1829 | |
---|
[610] | 1830 | // release the lock protecting Inode Tree |
---|
| 1831 | remote_rwlock_wr_release( lock_xp ); |
---|
| 1832 | |
---|
[602] | 1833 | #if DEBUG_VFS_UNLINK |
---|
| 1834 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
| 1835 | printk("\n[%s] thread[%x,%x] exit / removed <%s> inode from Inode Tree / cycle %d\n", |
---|
[610] | 1836 | __FUNCTION__, process->pid, this->trdid, path, cycle ); |
---|
[602] | 1837 | #endif |
---|
| 1838 | return 0; |
---|
| 1839 | } |
---|
| 1840 | else |
---|
| 1841 | { |
---|
[610] | 1842 | remote_rwlock_wr_release( lock_xp ); |
---|
| 1843 | printk("\n[ERROR] in %s : unsupported inode type %s\n", |
---|
| 1844 | __FUNCTION__ , vfs_inode_type_str( inode_type ) ); |
---|
[602] | 1845 | return -1; |
---|
| 1846 | } |
---|
| 1847 | |
---|
| 1848 | } // end vfs_unlink() |
---|
| 1849 | |
---|
[611] | 1850 | //////////////////////////////////////////////// |
---|
| 1851 | error_t vfs_stat( xptr_t root_inode_xp, |
---|
| 1852 | char * path, |
---|
| 1853 | struct stat * st ) |
---|
[1] | 1854 | { |
---|
[610] | 1855 | error_t error; |
---|
| 1856 | xptr_t inode_xp; // extended pointer on target inode |
---|
| 1857 | vfs_inode_t * inode_ptr; // local pointer on target inode |
---|
| 1858 | cxy_t inode_cxy; // target inode cluster identifier |
---|
| 1859 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
| 1860 | vfs_inode_t * vfs_root_ptr; // local_pointer on VFS root inode |
---|
| 1861 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
| 1862 | xptr_t lock_xp; // extended pointer on lock protecting Inode Tree |
---|
| 1863 | |
---|
| 1864 | thread_t * this = CURRENT_THREAD; |
---|
| 1865 | process_t * process = this->process; |
---|
| 1866 | |
---|
| 1867 | // build extended pointer on lock protecting Inode Tree (in VFS root inode) |
---|
| 1868 | vfs_root_xp = process->vfs_root_xp; |
---|
| 1869 | vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
| 1870 | vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
| 1871 | lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
| 1872 | |
---|
| 1873 | // get the lock protecting Inode Tree in read mode |
---|
| 1874 | remote_rwlock_rd_acquire( lock_xp ); |
---|
| 1875 | |
---|
| 1876 | // get extended pointer on target inode |
---|
| 1877 | error = vfs_lookup( root_inode_xp, |
---|
| 1878 | path, |
---|
| 1879 | 0, |
---|
| 1880 | &inode_xp, |
---|
| 1881 | NULL ); |
---|
| 1882 | |
---|
| 1883 | // release the lock protecting Inode Tree |
---|
| 1884 | remote_rwlock_rd_release( lock_xp ); |
---|
| 1885 | |
---|
| 1886 | if( error ) |
---|
| 1887 | { |
---|
| 1888 | printk("\n[ERROR] in %s : cannot found inode <%s>\n", |
---|
| 1889 | __FUNCTION__ , path ); |
---|
| 1890 | return -1; |
---|
| 1891 | } |
---|
| 1892 | |
---|
[598] | 1893 | // get cluster and local pointer on inode descriptor |
---|
[610] | 1894 | inode_ptr = GET_PTR( inode_xp ); |
---|
| 1895 | inode_cxy = GET_CXY( inode_xp ); |
---|
[598] | 1896 | |
---|
| 1897 | // get relevant infos from inode descriptor |
---|
| 1898 | uint32_t inum = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->inum ) ); |
---|
| 1899 | uint32_t size = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->size ) ); |
---|
| 1900 | uint32_t uid = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->uid ) ); |
---|
| 1901 | uint32_t gid = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->gid ) ); |
---|
| 1902 | uint32_t type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) ); |
---|
| 1903 | uint32_t rights = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->rights ) ); |
---|
| 1904 | |
---|
| 1905 | // set stat structure fields |
---|
| 1906 | st->st_ino = inum; |
---|
| 1907 | st->st_gid = gid; |
---|
| 1908 | st->st_uid = uid; |
---|
| 1909 | st->st_size = size; |
---|
| 1910 | st->st_mode = (type << 16) | rights; |
---|
| 1911 | |
---|
| 1912 | #if DEBUG_VFS_STAT |
---|
| 1913 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
| 1914 | if( DEBUG_VFS_STAT < cycle ) |
---|
| 1915 | printk("\n[%s] thread[%x,%x] set stat %x for inode %x in cluster %x / cycle %d\n" |
---|
| 1916 | " %s / inum %d / size %d\n", |
---|
[610] | 1917 | __FUNCTION__, process->pid, this->trdid, st, inode_ptr, inode_cxy, cycle, |
---|
[598] | 1918 | vfs_inode_type_str( type ), inum, size ); |
---|
| 1919 | #endif |
---|
| 1920 | |
---|
[1] | 1921 | return 0; |
---|
| 1922 | |
---|
[602] | 1923 | } // end vfs_stat() |
---|
| 1924 | |
---|
[23] | 1925 | //////////////////////////////////// |
---|
[610] | 1926 | error_t vfs_chdir( xptr_t root_xp, |
---|
[23] | 1927 | char * path ) |
---|
[1] | 1928 | { |
---|
[23] | 1929 | error_t error; |
---|
[610] | 1930 | xptr_t inode_xp; // extended pointer on target inode |
---|
| 1931 | cxy_t inode_cxy; // target inode cluster identifier |
---|
| 1932 | vfs_inode_t * inode_ptr; // target inode local pointer |
---|
| 1933 | vfs_inode_type_t inode_type; // target inode type |
---|
| 1934 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
| 1935 | vfs_inode_t * vfs_root_ptr; // local_pointer on VFS root inode |
---|
| 1936 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
| 1937 | xptr_t main_lock_xp; // extended pointer on lock protecting Inode Tree |
---|
| 1938 | xptr_t ref_xp; // extended pointer on reference process |
---|
| 1939 | process_t * ref_ptr; // local pointer on reference process |
---|
| 1940 | cxy_t ref_cxy; // reference process cluster |
---|
| 1941 | xptr_t cwd_lock_xp; // extended pointer on lock protecting CWD change |
---|
| 1942 | xptr_t cwd_xp_xp; // extended pointer on cwd_xp in reference process |
---|
[23] | 1943 | |
---|
[610] | 1944 | thread_t * this = CURRENT_THREAD; |
---|
| 1945 | process_t * process = this->process; |
---|
[23] | 1946 | |
---|
[610] | 1947 | #if DEBUG_VFS_CHDIR |
---|
| 1948 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
| 1949 | if( DEBUG_VFS_CHDIR < cycle ) |
---|
| 1950 | printk("\n[%s] thread[%x,%x] enter for path <%s> / cycle %d\n", |
---|
| 1951 | __FUNCTION__, process->pid, this->trdid, path, cycle ); |
---|
| 1952 | #endif |
---|
| 1953 | |
---|
| 1954 | // build extended pointer on lock protecting Inode Tree (in VFS root inode) |
---|
| 1955 | vfs_root_xp = process->vfs_root_xp; |
---|
| 1956 | vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
| 1957 | vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
| 1958 | main_lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
| 1959 | |
---|
| 1960 | // take lock protecting Inode Tree in read mode |
---|
| 1961 | remote_rwlock_rd_acquire( main_lock_xp ); |
---|
| 1962 | |
---|
[23] | 1963 | // get extended pointer on target inode |
---|
[610] | 1964 | error = vfs_lookup( root_xp, |
---|
| 1965 | path, |
---|
| 1966 | VFS_LOOKUP_DIR, |
---|
| 1967 | &inode_xp, |
---|
| 1968 | NULL ); |
---|
[23] | 1969 | |
---|
[610] | 1970 | // release lock protecting Inode Tree in read mode |
---|
| 1971 | remote_rwlock_rd_release( main_lock_xp ); |
---|
[23] | 1972 | |
---|
[610] | 1973 | if( error ) |
---|
| 1974 | { |
---|
| 1975 | printk("\n[ERROR] in %s : <%s> not found\n", |
---|
| 1976 | __FUNCTION__, path ); |
---|
| 1977 | return -1; |
---|
| 1978 | } |
---|
| 1979 | |
---|
| 1980 | // get inode type from remote file |
---|
[23] | 1981 | inode_cxy = GET_CXY( inode_xp ); |
---|
[473] | 1982 | inode_ptr = GET_PTR( inode_xp ); |
---|
[568] | 1983 | inode_type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) ); |
---|
[23] | 1984 | |
---|
| 1985 | if( inode_type != INODE_TYPE_DIR ) |
---|
| 1986 | { |
---|
[610] | 1987 | printk("\n[ERROR] in %s : <%s> is not a directory\n", |
---|
| 1988 | __FUNCTION__, path ); |
---|
[23] | 1989 | return -1; |
---|
| 1990 | } |
---|
| 1991 | |
---|
[610] | 1992 | // build extended pointer on cwd_lock and cwd_xp |
---|
| 1993 | ref_xp = process->ref_xp; |
---|
| 1994 | ref_ptr = GET_PTR( ref_xp ); |
---|
| 1995 | ref_cxy = GET_CXY( ref_xp ); |
---|
| 1996 | cwd_lock_xp = XPTR( ref_cxy , &ref_ptr->cwd_lock ); |
---|
| 1997 | cwd_xp_xp = XPTR( ref_cxy , &ref_ptr->cwd_xp ); |
---|
[568] | 1998 | |
---|
[610] | 1999 | // take lock protecting CWD changes |
---|
| 2000 | remote_busylock_acquire( cwd_lock_xp ); |
---|
[568] | 2001 | |
---|
[610] | 2002 | // update cwd_xp field in reference process descriptor |
---|
| 2003 | hal_remote_s64( cwd_xp_xp , inode_xp ); |
---|
| 2004 | |
---|
| 2005 | // release lock protecting CWD changes |
---|
| 2006 | remote_busylock_release( cwd_lock_xp ); |
---|
| 2007 | |
---|
| 2008 | #if DEBUG_VFS_CHDIR |
---|
| 2009 | cycle = (uint32_t)hal_get_cycles(); |
---|
| 2010 | if( DEBUG_VFS_CHDIR < cycle ) |
---|
| 2011 | printk("\n[%s] thread[%x,%x] exit : inode (%x,%x) / &cwd_xp (%x,%x) / cycle %d\n", |
---|
| 2012 | __FUNCTION__, process->pid, this->trdid, inode_cxy, inode_ptr, |
---|
| 2013 | GET_CXY(cwd_xp_xp), GET_PTR(cwd_xp_xp), cycle ); |
---|
| 2014 | #endif |
---|
| 2015 | |
---|
[1] | 2016 | return 0; |
---|
| 2017 | |
---|
[610] | 2018 | } // end vfs_chdir() |
---|
| 2019 | |
---|
[23] | 2020 | /////////////////////////////////// |
---|
| 2021 | error_t vfs_chmod( xptr_t cwd_xp, |
---|
| 2022 | char * path, |
---|
| 2023 | uint32_t rights ) |
---|
[1] | 2024 | { |
---|
[23] | 2025 | error_t error; |
---|
| 2026 | xptr_t inode_xp; // extended pointer on target inode |
---|
| 2027 | cxy_t inode_cxy; // inode cluster identifier |
---|
| 2028 | vfs_inode_t * inode_ptr; // inode local pointer |
---|
| 2029 | vfs_inode_type_t inode_type; // target inode type |
---|
| 2030 | |
---|
| 2031 | // set lookup working mode |
---|
[473] | 2032 | assert( (rights == 0), __FUNCTION__, |
---|
| 2033 | "access rights non implemented yet\n" ); |
---|
[23] | 2034 | |
---|
| 2035 | // get extended pointer on target inode |
---|
[610] | 2036 | error = vfs_lookup( cwd_xp, |
---|
| 2037 | path, |
---|
| 2038 | 0, |
---|
| 2039 | &inode_xp, |
---|
| 2040 | NULL ); |
---|
[23] | 2041 | |
---|
| 2042 | if( error ) return error; |
---|
| 2043 | |
---|
| 2044 | // get inode cluster and local pointer |
---|
| 2045 | inode_cxy = GET_CXY( inode_xp ); |
---|
[473] | 2046 | inode_ptr = GET_PTR( inode_xp ); |
---|
[23] | 2047 | |
---|
| 2048 | // get inode type from remote inode |
---|
[568] | 2049 | inode_type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) ); |
---|
[23] | 2050 | |
---|
[610] | 2051 | // TODO implement this function |
---|
| 2052 | |
---|
| 2053 | assert( false , "not implemented\n" ); |
---|
| 2054 | |
---|
[1] | 2055 | return 0; |
---|
| 2056 | } |
---|
| 2057 | |
---|
[23] | 2058 | /////////////////////////////////// |
---|
| 2059 | error_t vfs_mkfifo( xptr_t cwd_xp, |
---|
| 2060 | char * path, |
---|
| 2061 | uint32_t rights ) |
---|
| 2062 | { |
---|
[492] | 2063 | assert( false , "not implemented cwd_xp: %x, path <%s>, rights %x\n", |
---|
| 2064 | cwd_xp, path, rights ); |
---|
[23] | 2065 | return 0; |
---|
| 2066 | } |
---|
[1] | 2067 | |
---|
| 2068 | |
---|
| 2069 | |
---|
[188] | 2070 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
[602] | 2071 | // Distributed Inode Tree access related functions |
---|
[1] | 2072 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 2073 | |
---|
[188] | 2074 | ////////////////////////////////////////////////////////////////////////// |
---|
| 2075 | // This static function is called by the vfs_display() function. |
---|
[337] | 2076 | // that is supposed to take the TXT0 lock. |
---|
[188] | 2077 | ////////////////////////////////////////////////////////////////////////// |
---|
| 2078 | static void vfs_recursive_display( xptr_t inode_xp, |
---|
| 2079 | xptr_t name_xp, |
---|
| 2080 | uint32_t indent ) |
---|
| 2081 | { |
---|
| 2082 | cxy_t inode_cxy; |
---|
| 2083 | vfs_inode_t * inode_ptr; |
---|
| 2084 | vfs_inode_type_t inode_type; |
---|
[598] | 2085 | uint32_t inode_size; |
---|
| 2086 | uint32_t inode_inum; |
---|
| 2087 | uint32_t inode_attr; |
---|
| 2088 | uint32_t inode_dirty; |
---|
[204] | 2089 | xptr_t children_xp; // extended pointer on children xhtab |
---|
[188] | 2090 | |
---|
[204] | 2091 | xptr_t child_dentry_xp; |
---|
| 2092 | cxy_t child_dentry_cxy; |
---|
| 2093 | vfs_dentry_t * child_dentry_ptr; |
---|
| 2094 | xptr_t child_inode_xp; |
---|
| 2095 | xptr_t child_dentry_name_xp; |
---|
[598] | 2096 | mapper_t * mapper_ptr; |
---|
[188] | 2097 | |
---|
| 2098 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 2099 | |
---|
| 2100 | char * indent_str[] = { "", // level 0 |
---|
| 2101 | " ", // level 1 |
---|
| 2102 | " ", // level 2 |
---|
| 2103 | " ", // level 3 |
---|
| 2104 | " ", // level 4 |
---|
| 2105 | " ", // level 5 |
---|
| 2106 | " ", // level 6 |
---|
| 2107 | " ", // level 7 |
---|
| 2108 | " ", // level 8 |
---|
| 2109 | " ", // level 9 |
---|
| 2110 | " ", // level 10 |
---|
| 2111 | " ", // level 11 |
---|
| 2112 | " ", // level 12 |
---|
| 2113 | " ", // level 13 |
---|
| 2114 | " ", // level 14 |
---|
| 2115 | " " }; // level 15 |
---|
| 2116 | |
---|
[598] | 2117 | assert( (inode_xp != XPTR_NULL) , "inode_xp cannot be NULL\n" ); |
---|
| 2118 | assert( (name_xp != XPTR_NULL) , "name_xp cannot be NULL\n" ); |
---|
| 2119 | assert( (indent < 16) , "depth cannot be larger than 15\n" ); |
---|
[188] | 2120 | |
---|
[610] | 2121 | // get current inode cluster and local pointer |
---|
[188] | 2122 | inode_cxy = GET_CXY( inode_xp ); |
---|
[473] | 2123 | inode_ptr = GET_PTR( inode_xp ); |
---|
[188] | 2124 | |
---|
[598] | 2125 | // get inode type, size, attr, mapper, and inum |
---|
| 2126 | inode_type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) ); |
---|
| 2127 | inode_size = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->size ) ); |
---|
| 2128 | inode_inum = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->inum ) ); |
---|
| 2129 | inode_attr = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->attr ) ); |
---|
| 2130 | mapper_ptr = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->mapper ) ); |
---|
[188] | 2131 | |
---|
| 2132 | // make a local copy of node name |
---|
| 2133 | hal_remote_strcpy( XPTR( local_cxy , name ) , name_xp ); |
---|
| 2134 | |
---|
[598] | 2135 | // compute dirty |
---|
| 2136 | inode_dirty = ((inode_attr & INODE_ATTR_DIRTY) != 0); |
---|
| 2137 | |
---|
[188] | 2138 | // display inode |
---|
[614] | 2139 | nolock_printk("%s<%s> : %s / inum %d / %d bytes / dirty %d / cxy %x / inode %x / mapper %x\n", |
---|
| 2140 | indent_str[indent], name, vfs_inode_type_str( inode_type ), |
---|
[598] | 2141 | inode_inum, inode_size, inode_dirty, inode_cxy, inode_ptr, mapper_ptr ); |
---|
[188] | 2142 | |
---|
[611] | 2143 | // scan directory entries when current inode is a directory |
---|
| 2144 | // don't scan the the "." and ".." directories to break loops |
---|
| 2145 | if( (inode_type == INODE_TYPE_DIR) && |
---|
| 2146 | (strcmp( name , "." ) != 0) && |
---|
| 2147 | (strcmp( name , ".." ) != 0) ) |
---|
[188] | 2148 | { |
---|
| 2149 | // get extended pointer on directory entries xhtab |
---|
[204] | 2150 | children_xp = XPTR( inode_cxy , &inode_ptr->children ); |
---|
[188] | 2151 | |
---|
| 2152 | // get xhtab lock |
---|
[568] | 2153 | xhtab_lock( children_xp ); |
---|
[188] | 2154 | |
---|
| 2155 | // get first dentry from xhtab |
---|
[204] | 2156 | child_dentry_xp = xhtab_get_first( children_xp ); |
---|
[188] | 2157 | |
---|
[204] | 2158 | while( child_dentry_xp != XPTR_NULL ) |
---|
[188] | 2159 | { |
---|
| 2160 | // get dentry cluster and local pointer |
---|
[204] | 2161 | child_dentry_cxy = GET_CXY( child_dentry_xp ); |
---|
[473] | 2162 | child_dentry_ptr = GET_PTR( child_dentry_xp ); |
---|
[188] | 2163 | |
---|
| 2164 | // get extended pointer on child inode |
---|
[568] | 2165 | child_inode_xp = hal_remote_l64( XPTR( child_dentry_cxy, |
---|
[204] | 2166 | &child_dentry_ptr->child_xp ) ); |
---|
[188] | 2167 | |
---|
| 2168 | // get extended pointer on dentry name |
---|
[204] | 2169 | child_dentry_name_xp = XPTR( child_dentry_cxy , &child_dentry_ptr->name ); |
---|
[188] | 2170 | |
---|
[568] | 2171 | // recursive call on inode display |
---|
[204] | 2172 | vfs_recursive_display( child_inode_xp, |
---|
| 2173 | child_dentry_name_xp, |
---|
| 2174 | indent+1 ); |
---|
[188] | 2175 | |
---|
| 2176 | // get next dentry |
---|
[204] | 2177 | child_dentry_xp = xhtab_get_next( children_xp ); |
---|
[188] | 2178 | } |
---|
| 2179 | |
---|
| 2180 | // release xhtab lock |
---|
[568] | 2181 | xhtab_unlock( children_xp ); |
---|
[188] | 2182 | } |
---|
| 2183 | } // end vfs_recursive_display() |
---|
| 2184 | |
---|
| 2185 | /////////////////////////////////// |
---|
| 2186 | void vfs_display( xptr_t inode_xp ) |
---|
| 2187 | { |
---|
[204] | 2188 | xptr_t name_xp; |
---|
[188] | 2189 | xptr_t dentry_xp; |
---|
| 2190 | cxy_t dentry_cxy; |
---|
| 2191 | vfs_dentry_t * dentry_ptr; |
---|
[610] | 2192 | xptr_t parents_root_xp; // root of parent dentries xlist |
---|
[188] | 2193 | |
---|
| 2194 | // get target inode cluster and local pointer |
---|
| 2195 | cxy_t inode_cxy = GET_CXY( inode_xp ); |
---|
[473] | 2196 | vfs_inode_t * inode_ptr = GET_PTR( inode_xp ); |
---|
[188] | 2197 | |
---|
[610] | 2198 | // build extended pointer on parents dentries root |
---|
| 2199 | parents_root_xp = XPTR( inode_cxy , &inode_ptr->parents ); |
---|
[188] | 2200 | |
---|
[610] | 2201 | // check VFS root |
---|
| 2202 | if( xlist_is_empty( parents_root_xp ) ) // inode is the VFS root |
---|
[188] | 2203 | { |
---|
| 2204 | // build extended pointer on root name |
---|
| 2205 | name_xp = XPTR( local_cxy , "/" ); |
---|
| 2206 | } |
---|
| 2207 | else |
---|
| 2208 | { |
---|
[610] | 2209 | // get first parent dentry cluster and pointers |
---|
| 2210 | dentry_xp = XLIST_FIRST( parents_root_xp , vfs_dentry_t , parents ); |
---|
[188] | 2211 | dentry_cxy = GET_CXY( dentry_xp ); |
---|
[473] | 2212 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
[188] | 2213 | |
---|
| 2214 | // get extended pointer on dentry name |
---|
| 2215 | name_xp = XPTR( dentry_cxy , &dentry_ptr->name ); |
---|
| 2216 | } |
---|
| 2217 | |
---|
[337] | 2218 | // get pointers on TXT0 chdev |
---|
[407] | 2219 | xptr_t txt0_xp = chdev_dir.txt_tx[0]; |
---|
[337] | 2220 | cxy_t txt0_cxy = GET_CXY( txt0_xp ); |
---|
| 2221 | chdev_t * txt0_ptr = GET_PTR( txt0_xp ); |
---|
| 2222 | |
---|
| 2223 | // get extended pointer on remote TXT0 chdev lock |
---|
| 2224 | xptr_t lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock ); |
---|
| 2225 | |
---|
| 2226 | // get TXT0 lock in busy waiting mode |
---|
[568] | 2227 | remote_busylock_acquire( lock_xp ); |
---|
[337] | 2228 | |
---|
[188] | 2229 | // print header |
---|
[401] | 2230 | nolock_printk("\n***** file system state\n\n"); |
---|
[188] | 2231 | |
---|
| 2232 | // call recursive function |
---|
[473] | 2233 | vfs_recursive_display( inode_xp , name_xp , 0 ); |
---|
[188] | 2234 | |
---|
[337] | 2235 | // release lock |
---|
[568] | 2236 | remote_busylock_release( lock_xp ); |
---|
[337] | 2237 | |
---|
[204] | 2238 | } // end vfs_display() |
---|
[188] | 2239 | |
---|
[602] | 2240 | /* |
---|
[1] | 2241 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
[602] | 2242 | // This static function is used by the vfs_lookup() function. |
---|
[1] | 2243 | // It takes an extended pointer on a remote inode (parent directory inode), |
---|
| 2244 | // and check access_rights violation for the calling thread. |
---|
| 2245 | // It can be used by any thread running in any cluster. |
---|
| 2246 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 2247 | // @ inode_xp : extended pointer on inode. |
---|
| 2248 | // @ client_uid : client thread user ID |
---|
| 2249 | // @ client_gid : client thread group ID |
---|
| 2250 | // @ return true if access rights are violated. |
---|
| 2251 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
[602] | 2252 | static bool_t vfs_access_denied( xptr_t inode_xp, |
---|
[1] | 2253 | uint32_t client_uid, |
---|
| 2254 | uint32_t client_gid ) |
---|
| 2255 | { |
---|
| 2256 | // get found inode cluster and local pointer |
---|
| 2257 | cxy_t inode_cxy = GET_CXY( inode_xp ); |
---|
[473] | 2258 | vfs_inode_t * inode_ptr = GET_PTR( inode_xp ); |
---|
[1] | 2259 | |
---|
| 2260 | // get inode access mode, UID, and GID |
---|
[568] | 2261 | // TODO uint32_t mode = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->mode ) ); |
---|
| 2262 | uid_t uid = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->uid ) ); |
---|
| 2263 | gid_t gid = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->gid ) ); |
---|
[1] | 2264 | |
---|
| 2265 | // FIXME : me must use mode |
---|
| 2266 | if( (uid == client_uid) || (gid == client_gid) ) return false; |
---|
| 2267 | else return true; |
---|
| 2268 | } |
---|
[602] | 2269 | */ |
---|
[1] | 2270 | |
---|
| 2271 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 2272 | // This static function is used by the vfs_lookup() function. |
---|
[204] | 2273 | // It takes an extended pointer on a remote parent directory inode, a directory |
---|
[1] | 2274 | // entry name, and returns an extended pointer on the child inode. |
---|
| 2275 | // It can be used by any thread running in any cluster. |
---|
| 2276 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 2277 | // @ parent_xp : extended pointer on parent inode in remote cluster. |
---|
| 2278 | // @ name : dentry name |
---|
| 2279 | // @ child_xp : [out] buffer for extended pointer on child inode. |
---|
| 2280 | // @ return true if success / return false if not found. |
---|
| 2281 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 2282 | static bool_t vfs_get_child( xptr_t parent_xp, |
---|
| 2283 | char * name, |
---|
| 2284 | xptr_t * child_xp ) |
---|
| 2285 | { |
---|
[610] | 2286 | xptr_t xhtab_xp; // extended pointer on hash table for children dentries |
---|
| 2287 | xptr_t dentry_xp; // extended pointer on children dentry |
---|
| 2288 | cxy_t dentry_cxy; |
---|
| 2289 | vfs_dentry_t * dentry_ptr; |
---|
[1] | 2290 | |
---|
| 2291 | // get parent inode cluster and local pointer |
---|
| 2292 | cxy_t parent_cxy = GET_CXY( parent_xp ); |
---|
[473] | 2293 | vfs_inode_t * parent_ptr = GET_PTR( parent_xp ); |
---|
[1] | 2294 | |
---|
| 2295 | // get extended pointer on hash table of children directory entries |
---|
| 2296 | xhtab_xp = XPTR( parent_cxy , &parent_ptr->children ); |
---|
| 2297 | |
---|
[610] | 2298 | // get pointers on matching dentry |
---|
| 2299 | dentry_xp = xhtab_lookup( xhtab_xp , name ); |
---|
| 2300 | dentry_cxy = GET_CXY( dentry_xp ); |
---|
| 2301 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
[1] | 2302 | |
---|
[610] | 2303 | if( dentry_xp == XPTR_NULL ) |
---|
| 2304 | { |
---|
| 2305 | return false; |
---|
| 2306 | } |
---|
| 2307 | else |
---|
| 2308 | { |
---|
| 2309 | *child_xp = (xptr_t)hal_remote_l64( XPTR( dentry_cxy , &dentry_ptr->child_xp ) ); |
---|
| 2310 | return true; |
---|
| 2311 | } |
---|
[1] | 2312 | |
---|
[204] | 2313 | } // end vfs_get_child() |
---|
| 2314 | |
---|
[1] | 2315 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 2316 | // This static function is used by the vfs_lookup() function. |
---|
| 2317 | // It takes the <current> pointer on a buffer containing a complete pathname, and return |
---|
| 2318 | // in the <name> buffer, allocated by the caller, a single name in the path. |
---|
| 2319 | // It return also in the <next> pointer the next character to analyse in the path. |
---|
| 2320 | // Finally it returns a <last> boolean, that is true when the returned <name> is the |
---|
| 2321 | // last name in the path. The names are supposed to be separated by one or several '/' |
---|
| 2322 | // characters, that are not written in the <name> buffer. |
---|
[610] | 2323 | // |
---|
| 2324 | // WARNING: the leading characters '/' in the path are skiped before analysis. |
---|
| 2325 | // The path "/" identifies the VFS root, and is therefore anaysed as an empty |
---|
| 2326 | // string. This empty string is dignaled by the (-1) return value. |
---|
[1] | 2327 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 2328 | // @ current : pointer on first character to analyse in buffer containing the path. |
---|
| 2329 | // @ name : [out] pointer on buffer allocated by the caller for the returned name. |
---|
| 2330 | // @ next : [out] pointer on next character to analyse in buffer containing the path. |
---|
| 2331 | // @ last : [out] true if the returned name is the last (NUL character found). |
---|
[610] | 2332 | // @ return 0 if success / return -1 if string empty (first chracter is NUL). |
---|
[1] | 2333 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 2334 | static error_t vfs_get_name_from_path( char * current, |
---|
| 2335 | char * name, |
---|
| 2336 | char ** next, |
---|
| 2337 | bool_t * last ) |
---|
| 2338 | { |
---|
| 2339 | char * ptr = current; |
---|
| 2340 | |
---|
| 2341 | // skip leading '/' characters |
---|
| 2342 | while( *ptr == '/' ) ptr++; |
---|
| 2343 | |
---|
[610] | 2344 | // signal empty string |
---|
| 2345 | if( *ptr == 0 ) |
---|
| 2346 | { |
---|
| 2347 | *last = true; |
---|
| 2348 | return -1; |
---|
| 2349 | } |
---|
[1] | 2350 | |
---|
| 2351 | // copy all characters in name until NUL or '/' |
---|
| 2352 | while( (*ptr != 0) && (*ptr !='/') ) *(name++) = *(ptr++); |
---|
| 2353 | |
---|
[204] | 2354 | // set NUL terminating character in name buffer |
---|
| 2355 | *(name++) = 0; |
---|
| 2356 | |
---|
[1] | 2357 | // return last an next |
---|
| 2358 | if( *ptr == 0 ) // last found character is NUL => last name in path |
---|
| 2359 | { |
---|
| 2360 | *last = true; |
---|
| 2361 | } |
---|
| 2362 | else // last found character is '/' => skip it |
---|
| 2363 | { |
---|
| 2364 | *last = false; |
---|
| 2365 | *next = ptr + 1; |
---|
| 2366 | } |
---|
| 2367 | |
---|
| 2368 | return 0; |
---|
[204] | 2369 | |
---|
| 2370 | } // end vfs_get name_from_path() |
---|
[188] | 2371 | |
---|
[610] | 2372 | /////////////////////////////////////////////// |
---|
| 2373 | error_t vfs_lookup( xptr_t root_xp, |
---|
[23] | 2374 | char * pathname, |
---|
[610] | 2375 | uint32_t lookup_mode, |
---|
| 2376 | xptr_t * inode_xp, |
---|
| 2377 | char * last_name ) |
---|
[1] | 2378 | { |
---|
[101] | 2379 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; // one name in path |
---|
[1] | 2380 | |
---|
[23] | 2381 | xptr_t parent_xp; // extended pointer on parent inode |
---|
| 2382 | cxy_t parent_cxy; // cluster for parent inode |
---|
| 2383 | vfs_inode_t * parent_ptr; // local pointer on parent inode |
---|
[602] | 2384 | xptr_t dentry_xp; // extended pointer on dentry |
---|
[23] | 2385 | xptr_t child_xp; // extended pointer on child inode |
---|
| 2386 | cxy_t child_cxy; // cluster for child inode |
---|
[602] | 2387 | vfs_inode_t * child_ptr; // local pointer on child inode |
---|
[23] | 2388 | vfs_fs_type_t fs_type; // File system type |
---|
| 2389 | vfs_ctx_t * ctx_ptr; // local pointer on FS context |
---|
| 2390 | char * current; // current pointer on path |
---|
| 2391 | char * next; // next value for current pointer |
---|
| 2392 | bool_t last; // true when the name is the last in path |
---|
| 2393 | bool_t found; // true when a child has been found |
---|
[459] | 2394 | bool_t dir; // searched inode is a directory |
---|
| 2395 | bool_t create; // searched inode must be created if not found |
---|
| 2396 | bool_t excl; // searched inode must not exist |
---|
[610] | 2397 | bool_t par; // searched inode is the parent |
---|
[23] | 2398 | thread_t * this; // pointer on calling thread descriptor |
---|
| 2399 | process_t * process; // pointer on calling process descriptor |
---|
| 2400 | error_t error; |
---|
[1] | 2401 | |
---|
| 2402 | this = CURRENT_THREAD; |
---|
| 2403 | process = this->process; |
---|
| 2404 | |
---|
[610] | 2405 | // check pathname / root_xp consistency |
---|
| 2406 | assert( ((pathname[0] != '/') || (root_xp == process->vfs_root_xp)), |
---|
| 2407 | "root inode must be VFS root for path <%s>\n", pathname ); |
---|
| 2408 | |
---|
[438] | 2409 | #if DEBUG_VFS_LOOKUP |
---|
[433] | 2410 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[610] | 2411 | char root_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 2412 | vfs_inode_get_name( root_xp , root_name ); |
---|
[438] | 2413 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
[610] | 2414 | printk("\n[%s] thread[%x,%x] enter / root <%s> / path <%s> / mode %x / cycle %d\n", |
---|
| 2415 | __FUNCTION__, process->pid, this->trdid, root_name, pathname, lookup_mode, cycle ); |
---|
[433] | 2416 | #endif |
---|
[380] | 2417 | |
---|
[459] | 2418 | // compute lookup flags |
---|
[610] | 2419 | dir = (lookup_mode & VFS_LOOKUP_DIR) == VFS_LOOKUP_DIR; |
---|
| 2420 | create = (lookup_mode & VFS_LOOKUP_CREATE) == VFS_LOOKUP_CREATE; |
---|
| 2421 | excl = (lookup_mode & VFS_LOOKUP_EXCL) == VFS_LOOKUP_EXCL; |
---|
| 2422 | par = (lookup_mode & VFS_LOOKUP_PARENT) == VFS_LOOKUP_PARENT; |
---|
[1] | 2423 | |
---|
[610] | 2424 | // initialise loop variables |
---|
| 2425 | parent_xp = root_xp; |
---|
| 2426 | current = pathname; |
---|
| 2427 | next = NULL; |
---|
| 2428 | last = false; |
---|
| 2429 | child_xp = XPTR_NULL; |
---|
[1] | 2430 | |
---|
[610] | 2431 | // loop on nodes in pathname |
---|
| 2432 | // load from device if one node in path not found in Inode Tree |
---|
[401] | 2433 | // exit loop when last name found (i.e. last == true) |
---|
[610] | 2434 | while( 1 ) |
---|
[1] | 2435 | { |
---|
[610] | 2436 | // get parent inode cluster and local pointer |
---|
| 2437 | parent_cxy = GET_CXY( parent_xp ); |
---|
| 2438 | parent_ptr = GET_PTR( parent_xp ); |
---|
[1] | 2439 | |
---|
[610] | 2440 | // get one "name" from path, and "last" flag |
---|
| 2441 | error = vfs_get_name_from_path( current , name , &next , &last ); |
---|
| 2442 | |
---|
[611] | 2443 | // handle VFS root case |
---|
[610] | 2444 | if ( error ) |
---|
| 2445 | { |
---|
| 2446 | |
---|
| 2447 | #if DEBUG_VFS_LOOKUP |
---|
| 2448 | cycle = (uint32_t)hal_get_cycles(); |
---|
| 2449 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
| 2450 | printk("\n[%s] thread[%x,%x] exit / parent inode(%x,%x) / <%s> / cycle %d\n", |
---|
| 2451 | __FUNCTION__ , process->pid, this->trdid, parent_cxy, parent_ptr, pathname, cycle ); |
---|
| 2452 | #endif |
---|
| 2453 | *inode_xp = process->vfs_root_xp; |
---|
| 2454 | break; |
---|
| 2455 | } |
---|
| 2456 | |
---|
[438] | 2457 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
| 2458 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
[602] | 2459 | printk("\n[%s] thread[%x,%x] look for <%s> in <%s> / last = %d\n", |
---|
| 2460 | __FUNCTION__, process->pid, this->trdid, name, pathname, last ); |
---|
[433] | 2461 | #endif |
---|
[101] | 2462 | |
---|
[610] | 2463 | // search the child dentry matching name in parent inode |
---|
[1] | 2464 | found = vfs_get_child( parent_xp, |
---|
| 2465 | name, |
---|
| 2466 | &child_xp ); |
---|
| 2467 | |
---|
[611] | 2468 | // get child inode local pointer and cluster |
---|
| 2469 | child_ptr = GET_PTR( child_xp ); |
---|
| 2470 | child_cxy = GET_CXY( child_xp ); |
---|
| 2471 | |
---|
[610] | 2472 | // analyse found & last, depending on lookup_mode |
---|
| 2473 | if( found == false ) // not found in Inode Tree |
---|
[1] | 2474 | { |
---|
[610] | 2475 | // when a inode is not found in the Inode Tree: |
---|
| 2476 | // - if (last and par) the Inode Tree is not modified |
---|
| 2477 | // - else we speculatively introduce a new (dentry/inode) in inode tree, |
---|
| 2478 | // and scan the parent directory mapper to initialise it. |
---|
| 2479 | // . if it is not found in the parent mapper: |
---|
| 2480 | // - if(last and create), a brand new file or directory is created |
---|
| 2481 | // - else, an error is reported |
---|
| 2482 | // . if it is found in parent mapper: |
---|
| 2483 | // - if( last and excl ), an error is reported |
---|
| 2484 | // - else the new child (inode & dentry) is initialised in Inode Tree |
---|
| 2485 | // - if the child is a directory, the child mapper is loaded from device |
---|
[101] | 2486 | |
---|
[610] | 2487 | if( last && par ) // does nothing |
---|
| 2488 | { |
---|
| 2489 | |
---|
[438] | 2490 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
| 2491 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
[610] | 2492 | printk("\n[%s] thread[%x,%x] child not found but only parent requested in <%s>\n", |
---|
| 2493 | __FUNCTION__, process->pid, this->trdid, pathname ); |
---|
| 2494 | #endif |
---|
| 2495 | } |
---|
| 2496 | else // try to get it from parent mapper |
---|
| 2497 | { |
---|
| 2498 | |
---|
| 2499 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
| 2500 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
| 2501 | printk("\n[%s] thread[%x,%x] miss <%s> inode in Inode Tree => build from parent mapper\n", |
---|
[602] | 2502 | __FUNCTION__, process->pid, this->trdid, name ); |
---|
[433] | 2503 | #endif |
---|
[610] | 2504 | // get parent inode FS type |
---|
| 2505 | ctx_ptr = hal_remote_lpt( XPTR( parent_cxy,&parent_ptr->ctx ) ); |
---|
| 2506 | fs_type = hal_remote_l32( XPTR( parent_cxy , &ctx_ptr->type ) ); |
---|
[407] | 2507 | |
---|
[610] | 2508 | // select a cluster for new inode |
---|
| 2509 | child_cxy = cluster_random_select(); |
---|
[602] | 2510 | |
---|
[611] | 2511 | // insert a new child dentry/inode couple in inode tree |
---|
[610] | 2512 | error = vfs_add_child_in_parent( child_cxy, |
---|
| 2513 | fs_type, |
---|
| 2514 | parent_xp, |
---|
| 2515 | name, |
---|
| 2516 | &dentry_xp, |
---|
| 2517 | &child_xp ); |
---|
| 2518 | if( error ) |
---|
| 2519 | { |
---|
| 2520 | printk("\n[ERROR] in %s : cannot create inode <%s> in path <%s>\n", |
---|
| 2521 | __FUNCTION__ , name, pathname ); |
---|
| 2522 | return -1; |
---|
| 2523 | } |
---|
[238] | 2524 | |
---|
[610] | 2525 | // get child inode local pointer |
---|
| 2526 | child_ptr = GET_PTR( child_xp ); |
---|
[459] | 2527 | |
---|
| 2528 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
| 2529 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
[602] | 2530 | printk("\n[%s] thread[%x,%x] created missing inode <%s> in cluster %x\n", |
---|
| 2531 | __FUNCTION__, process->pid, this->trdid, name, child_cxy ); |
---|
[459] | 2532 | #endif |
---|
[610] | 2533 | // scan parent mapper to find the missing dentry, and complete |
---|
[611] | 2534 | // the initialisation of dentry and child inode descriptors |
---|
[610] | 2535 | if( parent_cxy == local_cxy ) |
---|
| 2536 | { |
---|
[623] | 2537 | error = vfs_fs_new_dentry( parent_ptr, |
---|
[610] | 2538 | name, |
---|
| 2539 | child_xp ); |
---|
| 2540 | } |
---|
| 2541 | else |
---|
| 2542 | { |
---|
[623] | 2543 | rpc_vfs_fs_new_dentry_client( parent_cxy, |
---|
[610] | 2544 | parent_ptr, |
---|
| 2545 | name, |
---|
| 2546 | child_xp, |
---|
| 2547 | &error ); |
---|
| 2548 | } |
---|
[238] | 2549 | |
---|
[610] | 2550 | if ( error ) // child not found in parent mapper |
---|
[459] | 2551 | { |
---|
[610] | 2552 | if ( last && create ) // add a brand new dentry in parent |
---|
[602] | 2553 | { |
---|
[612] | 2554 | error = vfs_new_dentry_init( parent_xp, |
---|
| 2555 | dentry_xp, |
---|
| 2556 | child_xp ); |
---|
[610] | 2557 | if ( error ) |
---|
| 2558 | { |
---|
| 2559 | printk("\n[ERROR] in %s : cannot init inode <%s> in path <%s>\n", |
---|
| 2560 | __FUNCTION__, name, pathname ); |
---|
| 2561 | vfs_remove_child_from_parent( dentry_xp ); |
---|
| 2562 | return -1; |
---|
| 2563 | } |
---|
[1] | 2564 | |
---|
[459] | 2565 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
| 2566 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
[610] | 2567 | printk("\n[%s] thread[%x,%x] child <%s> not found in parent mapper => create it\n", |
---|
[602] | 2568 | __FUNCTION__, process->pid, this->trdid, name ); |
---|
[459] | 2569 | #endif |
---|
[610] | 2570 | } |
---|
| 2571 | else // not last or not create => error |
---|
| 2572 | { |
---|
| 2573 | printk("\n[ERROR] in %s : <%s> node not found in parent for <%s>\n", |
---|
| 2574 | __FUNCTION__ , name , pathname ); |
---|
| 2575 | vfs_remove_child_from_parent( dentry_xp ); |
---|
| 2576 | return -1; |
---|
| 2577 | } |
---|
[238] | 2578 | } |
---|
[610] | 2579 | else // child has been found in parent mapper |
---|
[459] | 2580 | { |
---|
[610] | 2581 | // check the excl |
---|
| 2582 | if( last && create && excl ) |
---|
[459] | 2583 | { |
---|
[610] | 2584 | printk("\n[ERROR] in %s : node already exist <%s>\n", |
---|
| 2585 | __FUNCTION__, name ); |
---|
| 2586 | return -1; |
---|
[459] | 2587 | } |
---|
[610] | 2588 | |
---|
| 2589 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
| 2590 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
| 2591 | printk("\n[%s] thread[%x,%x] initialised inode <%s> from parent mapper\n", |
---|
| 2592 | __FUNCTION__, process->pid, this->trdid, name ); |
---|
| 2593 | #endif |
---|
| 2594 | // load child mapper from device if child is a directory (prefetch) |
---|
| 2595 | uint32_t type = hal_remote_l32( XPTR( child_cxy , &child_ptr->type ) ); |
---|
| 2596 | if( type == INODE_TYPE_DIR ) |
---|
[459] | 2597 | { |
---|
[610] | 2598 | if( child_cxy == local_cxy ) |
---|
| 2599 | { |
---|
| 2600 | error = vfs_inode_load_all_pages( child_ptr ); |
---|
| 2601 | } |
---|
| 2602 | else |
---|
| 2603 | { |
---|
| 2604 | rpc_vfs_inode_load_all_pages_client( child_cxy, |
---|
| 2605 | child_ptr, |
---|
| 2606 | &error ); |
---|
| 2607 | } |
---|
| 2608 | if ( error ) |
---|
| 2609 | { |
---|
| 2610 | printk("\n[ERROR] in %s : cannot load <%s> from device\n", |
---|
| 2611 | __FUNCTION__ , name ); |
---|
| 2612 | vfs_remove_child_from_parent( dentry_xp ); |
---|
| 2613 | return -1; |
---|
| 2614 | } |
---|
[238] | 2615 | |
---|
[438] | 2616 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
| 2617 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
[610] | 2618 | printk("\n[%s] thread[%x,%x] loaded directory mapper for <%s> from IOC\n", |
---|
| 2619 | __FUNCTION__ , process->pid, this->trdid, name ); |
---|
[433] | 2620 | #endif |
---|
[610] | 2621 | } |
---|
[459] | 2622 | } |
---|
| 2623 | } |
---|
[1] | 2624 | } |
---|
[610] | 2625 | else // child directly found in inode tree |
---|
[459] | 2626 | { |
---|
| 2627 | |
---|
[438] | 2628 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
| 2629 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
[610] | 2630 | printk("\n[%s] thread[%x,%x] found <%s> in Inode Tree / inode (%x,%x)\n", |
---|
[611] | 2631 | __FUNCTION__, process->pid, this->trdid, name, child_cxy, child_ptr ); |
---|
[433] | 2632 | #endif |
---|
[610] | 2633 | // check the excl flag |
---|
| 2634 | if( last && create && excl ) |
---|
[459] | 2635 | { |
---|
[610] | 2636 | printk("\n[ERROR] in %s : node <%s> already exist\n", |
---|
| 2637 | __FUNCTION__, name ); |
---|
| 2638 | return -1; |
---|
[459] | 2639 | } |
---|
| 2640 | } |
---|
| 2641 | |
---|
[380] | 2642 | // TODO check access rights here [AG] |
---|
[23] | 2643 | // error = vfs_access_denied( child_xp, |
---|
| 2644 | // client_uid, |
---|
| 2645 | // client_gid ); |
---|
| 2646 | // if( error ) |
---|
| 2647 | // { |
---|
[441] | 2648 | // printk("\n[ERROR] in %s : thread %x / permission denied for %s\n", |
---|
| 2649 | // __FUNCTION__ , this , name ); |
---|
[23] | 2650 | // return EACCES; |
---|
| 2651 | // } |
---|
[1] | 2652 | |
---|
[238] | 2653 | // take lock on child inode and release lock on parent |
---|
[610] | 2654 | // vfs_inode_lock( child_xp ); |
---|
| 2655 | // vfs_inode_unlock( parent_xp ); |
---|
[1] | 2656 | |
---|
[610] | 2657 | // exit when last |
---|
| 2658 | if ( last ) // last inode in path => return relevant info |
---|
| 2659 | { |
---|
| 2660 | if ( par ) // return parent inode and child name |
---|
| 2661 | { |
---|
[1] | 2662 | |
---|
[610] | 2663 | #if DEBUG_VFS_LOOKUP |
---|
| 2664 | cycle = (uint32_t)hal_get_cycles(); |
---|
| 2665 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
| 2666 | printk("\n[%s] thread[%x,%x] exit / parent inode(%x,%x) / <%s> / cycle %d\n", |
---|
| 2667 | __FUNCTION__ , process->pid, this->trdid, parent_cxy, parent_ptr, pathname, cycle ); |
---|
| 2668 | #endif |
---|
| 2669 | *inode_xp = parent_xp; |
---|
| 2670 | strcpy( last_name , name ); |
---|
| 2671 | break; |
---|
| 2672 | } |
---|
| 2673 | else // return child inode name |
---|
| 2674 | { |
---|
[1] | 2675 | |
---|
[438] | 2676 | #if DEBUG_VFS_LOOKUP |
---|
[433] | 2677 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 2678 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
[610] | 2679 | printk("\n[%s] thread[%x,%x] exit / child inode (%x,%x) / <%s> / cycle %d\n", |
---|
| 2680 | __FUNCTION__ , process->pid, this->trdid, child_cxy, child_ptr, pathname, cycle ); |
---|
[433] | 2681 | #endif |
---|
[610] | 2682 | *inode_xp = child_xp; |
---|
| 2683 | break; |
---|
| 2684 | } |
---|
| 2685 | } |
---|
| 2686 | else // not the last inode in path => update loop variables |
---|
| 2687 | { |
---|
| 2688 | parent_xp = child_xp; |
---|
| 2689 | current = next; |
---|
| 2690 | } |
---|
| 2691 | } |
---|
[1] | 2692 | |
---|
| 2693 | return 0; |
---|
| 2694 | |
---|
| 2695 | } // end vfs_lookup() |
---|
| 2696 | |
---|
[612] | 2697 | //////////////////////////////////////////////// |
---|
| 2698 | error_t vfs_new_dentry_init( xptr_t parent_xp, |
---|
| 2699 | xptr_t dentry_xp, |
---|
| 2700 | xptr_t child_xp ) |
---|
[602] | 2701 | { |
---|
| 2702 | error_t error; |
---|
| 2703 | uint32_t cluster; |
---|
| 2704 | uint32_t child_type; |
---|
| 2705 | uint32_t child_size; |
---|
| 2706 | |
---|
| 2707 | #if DEBUG_VFS_NEW_CHILD_INIT |
---|
| 2708 | char parent_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 2709 | char child_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 2710 | vfs_inode_get_name( parent_xp , parent_name ); |
---|
| 2711 | vfs_inode_get_name( child_xp , child_name ); |
---|
| 2712 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
| 2713 | thread_t * this = CURRENT_THREAD; |
---|
| 2714 | if( DEBUG_VFS_NEW_CHILD_INIT < cycle ) |
---|
| 2715 | printk("\n[%s] thread[%x,%x] enter / parent <%s> / child <%s> / cycle %d\n", |
---|
| 2716 | __FUNCTION__ , this->process->pid, this->trdid, parent_name, child_name, cycle ); |
---|
| 2717 | #endif |
---|
| 2718 | |
---|
| 2719 | // get parent inode cluster and local pointer |
---|
| 2720 | cxy_t parent_cxy = GET_CXY( parent_xp ); |
---|
| 2721 | vfs_inode_t * parent_ptr = GET_PTR( parent_xp ); |
---|
| 2722 | |
---|
| 2723 | // get dentry local pointer |
---|
| 2724 | vfs_dentry_t * dentry_ptr = GET_PTR( dentry_xp ); |
---|
| 2725 | |
---|
| 2726 | // get child inode cluster and local pointer |
---|
| 2727 | cxy_t child_cxy = GET_CXY( child_xp ); |
---|
| 2728 | vfs_inode_t * child_ptr = GET_PTR( child_xp ); |
---|
| 2729 | |
---|
| 2730 | // 1. allocate one free cluster to child inode |
---|
| 2731 | // depending on the child inode FS type |
---|
| 2732 | vfs_ctx_t * ctx = hal_remote_lpt( XPTR( child_cxy , &child_ptr->ctx ) ); |
---|
| 2733 | |
---|
| 2734 | error = vfs_fs_cluster_alloc( ctx->type, |
---|
| 2735 | &cluster ); |
---|
| 2736 | if ( error ) |
---|
| 2737 | { |
---|
| 2738 | printk("\n[ERROR] in %s : cannot find a free VFS cluster\n", |
---|
| 2739 | __FUNCTION__ ); |
---|
| 2740 | return -1; |
---|
| 2741 | } |
---|
| 2742 | |
---|
| 2743 | #if( DEBUG_VFS_NEW_CHILD_INIT & 1) |
---|
| 2744 | if( DEBUG_VFS_NEW_CHILD_INIT < cycle ) |
---|
| 2745 | printk("\n[%s] thread[%x,%x] allocated one FAT cluster to <%s>\n", |
---|
| 2746 | __FUNCTION__ , this->process->pid, this->trdid, child_name ); |
---|
| 2747 | #endif |
---|
| 2748 | |
---|
| 2749 | // 2. update the child inode descriptor |
---|
| 2750 | child_type = hal_remote_l32( XPTR( child_cxy , &child_ptr->type ) ); |
---|
| 2751 | child_size = (child_type == INODE_TYPE_DIR) ? 4096 : 0; |
---|
| 2752 | |
---|
| 2753 | hal_remote_s32( XPTR( child_cxy , &child_ptr->size ) , child_size ); |
---|
| 2754 | hal_remote_spt( XPTR( child_cxy , &child_ptr->extend ) , (void*)(intptr_t)cluster ); |
---|
| 2755 | |
---|
| 2756 | // 3. update the parent inode mapper, and |
---|
| 2757 | // update the dentry extension if required |
---|
| 2758 | if( local_cxy == parent_cxy ) |
---|
| 2759 | { |
---|
| 2760 | error = vfs_fs_add_dentry( parent_ptr, |
---|
| 2761 | dentry_ptr ); |
---|
| 2762 | } |
---|
| 2763 | else |
---|
| 2764 | { |
---|
| 2765 | rpc_vfs_fs_add_dentry_client( parent_cxy, |
---|
| 2766 | parent_ptr, |
---|
| 2767 | dentry_ptr, |
---|
| 2768 | &error ); |
---|
| 2769 | } |
---|
| 2770 | if ( error ) |
---|
| 2771 | { |
---|
| 2772 | printk("\n[ERROR] in %s : cannot register child in parent directory\n", |
---|
| 2773 | __FUNCTION__ ); |
---|
| 2774 | return -1; |
---|
| 2775 | } |
---|
| 2776 | |
---|
| 2777 | #if DEBUG_VFS_NEW_CHILD_INIT |
---|
| 2778 | cycle = (uint32_t)hal_get_cycles(); |
---|
| 2779 | if( DEBUG_VFS_NEW_CHILD_INIT < cycle ) |
---|
[610] | 2780 | printk("\n[%s] thread[%x,%x] exit / parent <%s> / child <%s> / cycle %d\n", |
---|
[602] | 2781 | __FUNCTION__ , this->process->pid, this->trdid, parent_name, child_name, cycle ); |
---|
| 2782 | #endif |
---|
| 2783 | |
---|
| 2784 | return 0; |
---|
| 2785 | |
---|
[612] | 2786 | } // end vfs_new_dentry_init() |
---|
[602] | 2787 | |
---|
[611] | 2788 | /////////////////////////////////////////////////// |
---|
| 2789 | error_t vfs_add_special_dentries( xptr_t child_xp, |
---|
| 2790 | xptr_t parent_xp ) |
---|
| 2791 | { |
---|
| 2792 | error_t error; |
---|
| 2793 | vfs_inode_t * child_ptr; // local pointer on child inode directory |
---|
| 2794 | cxy_t child_cxy; // child inode directory cluster identifier |
---|
| 2795 | vfs_inode_t * parent_ptr; // local pointer on parent inode directory |
---|
| 2796 | cxy_t parent_cxy; // parent inode directory cluster identifier |
---|
| 2797 | vfs_ctx_t * ctx_ptr; // local pointer on child inode FS context |
---|
| 2798 | vfs_fs_type_t fs_type; // FS type of child inode |
---|
| 2799 | xptr_t dentry_xp; // extended pointer on dentry (used for . and ..) |
---|
| 2800 | vfs_dentry_t * dentry_ptr; // local pointer on dentry (used for . and ..) |
---|
| 2801 | |
---|
[612] | 2802 | // xptr_t parents_root_xp; // extended pointer on inode "parents" field |
---|
| 2803 | // xptr_t parents_entry_xp; // extended pointer on dentry "parents" field |
---|
[611] | 2804 | xptr_t children_xhtab_xp; // extended pointer on inode "children" field |
---|
| 2805 | xptr_t children_entry_xp; // extended pointer on dentry "children" field |
---|
| 2806 | |
---|
| 2807 | #if DEBUG_VFS_ADD_SPECIAL |
---|
| 2808 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
| 2809 | thread_t * this = CURRENT_THREAD; |
---|
| 2810 | char child_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 2811 | char parent_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 2812 | vfs_inode_get_name( child_xp , child_name ); |
---|
| 2813 | vfs_inode_get_name( parent_xp , parent_name ); |
---|
| 2814 | if( DEBUG_VFS_ADD_SPECIAL < cycle ) |
---|
[612] | 2815 | printk("\n[%s] thread[%x,%x] enter for child <%s> in parent <%s> / cycle %d\n", |
---|
[611] | 2816 | __FUNCTION__, this->process->pid, this->trdid, child_name, parent_name, cycle ); |
---|
| 2817 | #endif |
---|
| 2818 | |
---|
| 2819 | // get new directory cluster and local pointer |
---|
| 2820 | child_cxy = GET_CXY( child_xp ); |
---|
| 2821 | child_ptr = GET_PTR( child_xp ); |
---|
| 2822 | |
---|
| 2823 | // get parent directory cluster and local pointer |
---|
| 2824 | parent_cxy = GET_CXY( parent_xp ); |
---|
| 2825 | parent_ptr = GET_PTR( parent_xp ); |
---|
| 2826 | |
---|
| 2827 | // get child inode FS type |
---|
| 2828 | ctx_ptr = hal_remote_lpt( XPTR( child_cxy , &child_ptr->ctx ) ); |
---|
| 2829 | fs_type = hal_remote_l32( XPTR( child_cxy , &ctx_ptr->type ) ); |
---|
| 2830 | |
---|
| 2831 | //////////////////////////// create <.> |
---|
| 2832 | if( child_cxy == local_cxy ) |
---|
| 2833 | { |
---|
| 2834 | error = vfs_dentry_create( fs_type, |
---|
| 2835 | ".", |
---|
| 2836 | &dentry_xp ); |
---|
| 2837 | } |
---|
| 2838 | else |
---|
| 2839 | { |
---|
| 2840 | rpc_vfs_dentry_create_client( child_cxy, |
---|
| 2841 | fs_type, |
---|
| 2842 | ".", |
---|
| 2843 | &dentry_xp, |
---|
| 2844 | &error ); |
---|
| 2845 | } |
---|
| 2846 | if( error ) |
---|
| 2847 | { |
---|
| 2848 | printk("\n[ERROR] in %s : cannot create dentry <.> in cluster %x\n", |
---|
| 2849 | __FUNCTION__ , child_cxy ); |
---|
| 2850 | return -1; |
---|
| 2851 | } |
---|
| 2852 | |
---|
| 2853 | // get <.> dentry local pointer |
---|
| 2854 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
| 2855 | |
---|
| 2856 | #if(DEBUG_VFS_ADD_SPECIAL & 1) |
---|
| 2857 | if( DEBUG_VFS_ADD_SPECIAL < cycle ) |
---|
| 2858 | printk("\n[%s] thread[%x,%x] created dentry <.> (%x,%x)\n", |
---|
| 2859 | __FUNCTION__, this->process->pid, this->trdid, child_cxy, dentry_ptr ); |
---|
| 2860 | #endif |
---|
| 2861 | |
---|
| 2862 | // register <.> dentry in child inode xhtab of children |
---|
| 2863 | children_xhtab_xp = XPTR( child_cxy , &child_ptr->children ); |
---|
| 2864 | children_entry_xp = XPTR( child_cxy , &dentry_ptr->children ); |
---|
| 2865 | error = xhtab_insert( children_xhtab_xp , "." , children_entry_xp ); |
---|
| 2866 | if( error ) |
---|
| 2867 | { |
---|
| 2868 | printk("\n[ERROR] in %s : cannot register dentry <.> in xhtab\n", |
---|
| 2869 | __FUNCTION__ ); |
---|
| 2870 | return -1; |
---|
| 2871 | } |
---|
| 2872 | |
---|
[612] | 2873 | |
---|
| 2874 | // don't register <.> dentry in child_inode xlist of parents |
---|
| 2875 | // parents_root_xp = XPTR( child_cxy , &child_ptr->parents ); |
---|
| 2876 | // parents_entry_xp = XPTR( child_cxy , &dentry_ptr->parents ); |
---|
| 2877 | // xlist_add_first( parents_root_xp , parents_entry_xp ); |
---|
| 2878 | // hal_remote_atomic_add( XPTR( child_cxy , &child_ptr->links ) , 1 ); |
---|
[611] | 2879 | |
---|
| 2880 | // update "parent" and "child_xp" fields in <.> dentry |
---|
| 2881 | hal_remote_s64( XPTR( child_cxy , &dentry_ptr->child_xp ) , child_xp ); |
---|
| 2882 | hal_remote_spt( XPTR( child_cxy , &dentry_ptr->parent ) , child_ptr ); |
---|
| 2883 | |
---|
| 2884 | #if(DEBUG_VFS_ADD_SPECIAL & 1) |
---|
| 2885 | if( DEBUG_VFS_ADD_SPECIAL < cycle ) |
---|
| 2886 | printk("\n[%s] thread[%x,%x] linked dentry <.> to parent and child inodes\n", |
---|
| 2887 | __FUNCTION__, this->process->pid, this->trdid ); |
---|
| 2888 | #endif |
---|
| 2889 | |
---|
| 2890 | // introduce <.> dentry into child directory mapper |
---|
| 2891 | if( child_cxy == local_cxy ) |
---|
| 2892 | { |
---|
| 2893 | error = vfs_fs_add_dentry( child_ptr, |
---|
| 2894 | dentry_ptr ); |
---|
| 2895 | } |
---|
| 2896 | else |
---|
| 2897 | { |
---|
| 2898 | rpc_vfs_fs_add_dentry_client( child_cxy, |
---|
| 2899 | child_ptr, |
---|
| 2900 | dentry_ptr, |
---|
| 2901 | &error ); |
---|
| 2902 | } |
---|
| 2903 | if( error ) |
---|
| 2904 | { |
---|
| 2905 | printk("\n[ERROR] in %s : cannot introduce dentry <..> in mapper %x\n", |
---|
| 2906 | __FUNCTION__ ); |
---|
| 2907 | return -1; |
---|
| 2908 | } |
---|
| 2909 | |
---|
| 2910 | #if(DEBUG_VFS_ADD_SPECIAL & 1) |
---|
| 2911 | if( DEBUG_VFS_ADD_SPECIAL < cycle ) |
---|
| 2912 | printk("\n[%s] thread[%x,%x] registered dentry <.> in child mapper\n", |
---|
| 2913 | __FUNCTION__, this->process->pid, this->trdid ); |
---|
| 2914 | #endif |
---|
| 2915 | |
---|
| 2916 | ///////////////////////////// create <..> dentry |
---|
| 2917 | if( child_cxy == local_cxy ) |
---|
| 2918 | { |
---|
| 2919 | error = vfs_dentry_create( fs_type, |
---|
| 2920 | "..", |
---|
| 2921 | &dentry_xp ); |
---|
| 2922 | } |
---|
| 2923 | else |
---|
| 2924 | { |
---|
| 2925 | rpc_vfs_dentry_create_client( child_cxy, |
---|
| 2926 | fs_type, |
---|
| 2927 | "..", |
---|
| 2928 | &dentry_xp, |
---|
| 2929 | &error ); |
---|
| 2930 | } |
---|
| 2931 | if( error ) |
---|
| 2932 | { |
---|
| 2933 | printk("\n[ERROR] in %s : cannot create dentry <..> in cluster %x\n", |
---|
| 2934 | __FUNCTION__ , child_cxy ); |
---|
| 2935 | return -1; |
---|
| 2936 | } |
---|
| 2937 | |
---|
| 2938 | // get <..> dentry local pointer |
---|
| 2939 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
| 2940 | |
---|
| 2941 | #if(DEBUG_VFS_ADD_SPECIAL & 1) |
---|
| 2942 | if( DEBUG_VFS_ADD_SPECIAL < cycle ) |
---|
| 2943 | printk("\n[%s] thread[%x,%x] created dentry <..> (%x,%x)\n", |
---|
| 2944 | __FUNCTION__, this->process->pid, this->trdid, child_cxy, dentry_ptr ); |
---|
| 2945 | #endif |
---|
| 2946 | |
---|
| 2947 | // register <..> dentry in child_inode xhtab of children |
---|
| 2948 | children_xhtab_xp = XPTR( child_cxy , &child_ptr->children ); |
---|
| 2949 | children_entry_xp = XPTR( child_cxy , &dentry_ptr->children ); |
---|
| 2950 | error = xhtab_insert( children_xhtab_xp , ".." , children_entry_xp ); |
---|
| 2951 | if( error ) |
---|
| 2952 | { |
---|
| 2953 | printk("\n[ERROR] in %s : cannot register dentry <..> in xhtab\n", |
---|
| 2954 | __FUNCTION__ ); |
---|
| 2955 | return -1; |
---|
| 2956 | } |
---|
| 2957 | |
---|
[612] | 2958 | // don't register <..> dentry in parent_inode xlist of parents |
---|
| 2959 | // parents_root_xp = XPTR( parent_cxy , &parent_ptr->parents ); |
---|
| 2960 | // parents_entry_xp = XPTR( child_cxy , &dentry_ptr->parents ); |
---|
| 2961 | // xlist_add_first( parents_root_xp , parents_entry_xp ); |
---|
| 2962 | // hal_remote_atomic_add( XPTR( parent_cxy , &parent_ptr->links ) , 1 ); |
---|
[611] | 2963 | |
---|
| 2964 | // update "parent" and "child_xp" fields in <..> dentry |
---|
| 2965 | hal_remote_s64( XPTR( child_cxy , &dentry_ptr->child_xp ) , parent_xp ); |
---|
| 2966 | hal_remote_spt( XPTR( child_cxy , &dentry_ptr->parent ) , child_ptr ); |
---|
| 2967 | |
---|
| 2968 | #if(DEBUG_VFS_ADD_SPECIAL & 1) |
---|
| 2969 | if( DEBUG_VFS_ADD_SPECIAL < cycle ) |
---|
| 2970 | printk("\n[%s] thread[%x,%x] linked dentry <..> to parent and child inodes\n", |
---|
| 2971 | __FUNCTION__, this->process->pid, this->trdid ); |
---|
| 2972 | #endif |
---|
| 2973 | |
---|
| 2974 | // introduce <..> dentry into child directory mapper |
---|
| 2975 | if( child_cxy == local_cxy ) |
---|
| 2976 | { |
---|
| 2977 | error = vfs_fs_add_dentry( child_ptr, |
---|
| 2978 | dentry_ptr ); |
---|
| 2979 | } |
---|
| 2980 | else |
---|
| 2981 | { |
---|
| 2982 | rpc_vfs_fs_add_dentry_client( child_cxy, |
---|
| 2983 | child_ptr, |
---|
| 2984 | dentry_ptr, |
---|
| 2985 | &error ); |
---|
| 2986 | } |
---|
| 2987 | if( error ) |
---|
| 2988 | { |
---|
| 2989 | printk("\n[ERROR] in %s : cannot introduce dentry <..> in mapper %x\n", |
---|
| 2990 | __FUNCTION__ ); |
---|
| 2991 | return -1; |
---|
| 2992 | } |
---|
| 2993 | |
---|
| 2994 | #if(DEBUG_VFS_ADD_SPECIAL & 1) |
---|
| 2995 | if( DEBUG_VFS_ADD_SPECIAL < cycle ) |
---|
| 2996 | printk("\n[%s] thread[%x,%x] registered dentry <..> in child mapper\n", |
---|
| 2997 | __FUNCTION__, this->process->pid, this->trdid ); |
---|
| 2998 | #endif |
---|
| 2999 | |
---|
| 3000 | #if DEBUG_VFS_ADD_SPECIAL |
---|
| 3001 | cycle = (uint32_t)hal_get_cycles(); |
---|
| 3002 | if( DEBUG_VFS_ADD_SPECIAL < cycle ) |
---|
[612] | 3003 | printk("\n[%s] thread[%x,%x] exit for child <%s> in parent <%s> / cycle %d\n", |
---|
| 3004 | __FUNCTION__, this->process->pid, this->trdid, child_name, parent_name, cycle ); |
---|
[611] | 3005 | #endif |
---|
| 3006 | |
---|
| 3007 | return 0; |
---|
| 3008 | |
---|
| 3009 | } // end vfs_add_special_dentries() |
---|
| 3010 | |
---|
[610] | 3011 | ////////////////////////////////////////// |
---|
| 3012 | error_t vfs_get_path( xptr_t inode_xp, |
---|
| 3013 | char * buffer, |
---|
| 3014 | char ** first, |
---|
| 3015 | uint32_t max_size ) |
---|
[1] | 3016 | { |
---|
[610] | 3017 | xptr_t dentry_xp; // extended pointer on current dentry |
---|
| 3018 | vfs_dentry_t * dentry_ptr; // local pointer on current dentry |
---|
| 3019 | cxy_t dentry_cxy; // current dentry cluster identifier |
---|
| 3020 | xptr_t name_xp; // extended pointer on current dentry name |
---|
| 3021 | uint32_t length; // length of current dentry name |
---|
| 3022 | int32_t index; // slot index in buffer |
---|
| 3023 | xptr_t current_xp; // extended pointer on current inode |
---|
| 3024 | vfs_inode_t * current_ptr; // local pointer on current inode |
---|
| 3025 | cxy_t current_cxy; // current inode cluster identifier |
---|
| 3026 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
| 3027 | vfs_inode_t * vfs_root_ptr; // local pointer on VFS root inode |
---|
| 3028 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
| 3029 | xptr_t lock_xp; // extended pointer on Inode Tree lock |
---|
| 3030 | xptr_t parents_root_xp; // extended pointer on current inode parents root |
---|
| 3031 | bool_t found; // condition to exit the while loop |
---|
[1] | 3032 | |
---|
[610] | 3033 | thread_t * this = CURRENT_THREAD; |
---|
| 3034 | process_t * process = this->process; |
---|
[1] | 3035 | |
---|
[610] | 3036 | #if DEBUG_VFS_GET_PATH |
---|
| 3037 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
| 3038 | if( DEBUG_VFS_GET_PATH < cycle ) |
---|
| 3039 | printk("\n[%s] thread[%x,%x] enter : inode (%x,%x) / cycle %d\n", |
---|
| 3040 | __FUNCTION__ , process->pid, this->trdid, |
---|
| 3041 | GET_CXY( inode_xp ), GET_PTR( inode_xp ), cycle ); |
---|
| 3042 | #endif |
---|
| 3043 | |
---|
| 3044 | // set the NUL character in buffer / initialise buffer index |
---|
[1] | 3045 | buffer[max_size - 1] = 0; |
---|
[610] | 3046 | index = (int32_t)(max_size - 1); |
---|
[1] | 3047 | |
---|
| 3048 | // initialize current inode |
---|
[610] | 3049 | current_xp = inode_xp; |
---|
[1] | 3050 | |
---|
[610] | 3051 | // build extended pointer on lock protecting Inode Tree |
---|
| 3052 | vfs_root_xp = process->vfs_root_xp; |
---|
| 3053 | vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
| 3054 | vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
| 3055 | lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
| 3056 | |
---|
| 3057 | // take lock protecting Inode Tree in read mode |
---|
| 3058 | remote_rwlock_rd_acquire( lock_xp ); |
---|
| 3059 | |
---|
| 3060 | // traverse Inode Tree from target inode to VFS root |
---|
| 3061 | // selecting always the first parent dentry |
---|
| 3062 | // the buffer is written in "reverse order" (from target inode to root) |
---|
| 3063 | // exit the while loop when the VFS root has been found |
---|
[1] | 3064 | do |
---|
| 3065 | { |
---|
[610] | 3066 | // get current inode cluster and local pointer |
---|
| 3067 | current_cxy = GET_CXY( current_xp ); |
---|
| 3068 | current_ptr = GET_PTR( current_xp ); |
---|
[1] | 3069 | |
---|
[610] | 3070 | // build extended pointer on parents dentries root |
---|
| 3071 | parents_root_xp = XPTR( current_cxy , ¤t_ptr->parents ); |
---|
[1] | 3072 | |
---|
[610] | 3073 | // compute exit condition <=> current inode is VFS root |
---|
| 3074 | found = xlist_is_empty( parents_root_xp ); |
---|
[1] | 3075 | |
---|
[610] | 3076 | if( found ) // parent is the VFS root |
---|
| 3077 | { |
---|
| 3078 | if( index == (int32_t)(max_size - 1) ) |
---|
| 3079 | { |
---|
| 3080 | // update index |
---|
| 3081 | index--; |
---|
| 3082 | |
---|
| 3083 | // set separator |
---|
| 3084 | buffer[index] = '/'; |
---|
[1] | 3085 | |
---|
[610] | 3086 | // check buffer overflow |
---|
| 3087 | assert( (index >= 0) , "kernel buffer too small\n" ); |
---|
[1] | 3088 | |
---|
[610] | 3089 | } |
---|
| 3090 | } |
---|
| 3091 | else // not the VFS root |
---|
[1] | 3092 | { |
---|
[610] | 3093 | // get first parent dentry cluster and pointers |
---|
| 3094 | dentry_xp = XLIST_FIRST( parents_root_xp , vfs_dentry_t , parents ); |
---|
| 3095 | dentry_cxy = GET_CXY( dentry_xp ); |
---|
| 3096 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
[1] | 3097 | |
---|
[610] | 3098 | // get extended pointer on dentry name and name length |
---|
| 3099 | name_xp = XPTR( dentry_cxy , dentry_ptr->name ); |
---|
| 3100 | length = hal_remote_l32( XPTR( dentry_cxy , &dentry_ptr->length ) ); |
---|
[1] | 3101 | |
---|
[610] | 3102 | #if (DEBUG_VFS_GET_PATH & 1) |
---|
| 3103 | char debug_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 3104 | hal_remote_strcpy( XPTR( local_cxy , debug_name ) , name_xp ); |
---|
| 3105 | if( DEBUG_VFS_GET_PATH < cycle ) |
---|
| 3106 | printk("\n[%s] thread(%x,%s) get current dentry <%s> in cluster %x\n", |
---|
| 3107 | __FUNCTION__ , process->pid, this->trdid, debug_name, current_cxy ); |
---|
| 3108 | #endif |
---|
| 3109 | // update index |
---|
| 3110 | index -= (length + 1); |
---|
| 3111 | |
---|
| 3112 | // check buffer overflow |
---|
| 3113 | assert( (index >= 0) , "kernel buffer too small\n" ); |
---|
| 3114 | |
---|
| 3115 | // update pathname |
---|
| 3116 | hal_remote_memcpy( XPTR( local_cxy , &buffer[index + 1] ) , |
---|
| 3117 | name_xp , length ); |
---|
| 3118 | |
---|
| 3119 | // set separator |
---|
| 3120 | buffer[index] = '/'; |
---|
| 3121 | |
---|
| 3122 | // get extended pointer on parent inode |
---|
| 3123 | current_xp = XPTR( dentry_cxy , |
---|
| 3124 | hal_remote_lpt( XPTR( dentry_cxy , &dentry_ptr->parent ) ) ); |
---|
| 3125 | } |
---|
[1] | 3126 | } |
---|
[610] | 3127 | while( found == false ); |
---|
[1] | 3128 | |
---|
[610] | 3129 | // release lock protecting Inode Tree in read mode |
---|
| 3130 | remote_rwlock_rd_release( lock_xp ); |
---|
| 3131 | |
---|
| 3132 | #if DEBUG_VFS_GET_PATH |
---|
| 3133 | cycle = (uint32_t)hal_get_cycles(); |
---|
| 3134 | if( DEBUG_VFS_GET_PATH < cycle ) |
---|
| 3135 | printk("\n[%s] thread[%x,%x] exit : path <%s> / cycle %d\n", |
---|
| 3136 | __FUNCTION__ , process->pid, this->trdid, &buffer[index], cycle ); |
---|
| 3137 | #endif |
---|
| 3138 | |
---|
| 3139 | // return pointer on first character in buffer |
---|
| 3140 | *first = &buffer[index]; |
---|
[1] | 3141 | return 0; |
---|
| 3142 | |
---|
| 3143 | } // end vfs_get_path() |
---|
| 3144 | |
---|
[188] | 3145 | |
---|
[602] | 3146 | //////////////////////////////////////////////////////////////////// |
---|
[610] | 3147 | error_t vfs_add_child_in_parent( cxy_t child_cxy, |
---|
[23] | 3148 | vfs_fs_type_t fs_type, |
---|
[602] | 3149 | xptr_t parent_inode_xp, |
---|
[23] | 3150 | char * name, |
---|
[610] | 3151 | xptr_t * child_dentry_xp, |
---|
[602] | 3152 | xptr_t * child_inode_xp ) |
---|
[1] | 3153 | { |
---|
[610] | 3154 | error_t error; |
---|
| 3155 | cxy_t parent_cxy; // parent inode cluster identifier |
---|
| 3156 | vfs_inode_t * parent_inode_ptr; // parent inode local pointer |
---|
| 3157 | xptr_t new_dentry_xp; // extended pointer on created dentry |
---|
| 3158 | vfs_dentry_t * new_dentry_ptr; // created dentry local pointer |
---|
| 3159 | xptr_t new_inode_xp; // extended pointer on created child inode |
---|
| 3160 | vfs_inode_t * new_inode_ptr; // local pointer on created child inode |
---|
[1] | 3161 | |
---|
[610] | 3162 | xptr_t parents_root_xp; // extended pointer on child inode "parents" field |
---|
| 3163 | xptr_t parents_entry_xp; // extended pointer on child dentry "parents" field |
---|
| 3164 | xptr_t children_xhtab_xp; // extended pointer on parent inode "children" field |
---|
| 3165 | xptr_t children_entry_xp; // extended pointer on child dentry "children" field |
---|
| 3166 | |
---|
| 3167 | // get parent inode cluster and pointer |
---|
| 3168 | parent_cxy = GET_CXY( parent_inode_xp ); |
---|
[602] | 3169 | parent_inode_ptr = GET_PTR( parent_inode_xp ); |
---|
[1] | 3170 | |
---|
[438] | 3171 | #if DEBUG_VFS_ADD_CHILD |
---|
[602] | 3172 | char parent_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 3173 | vfs_inode_get_name( parent_inode_xp , parent_name ); |
---|
[433] | 3174 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[568] | 3175 | thread_t * this = CURRENT_THREAD; |
---|
[438] | 3176 | if( DEBUG_VFS_ADD_CHILD < cycle ) |
---|
[610] | 3177 | printk("\n[%s] thread[%x,%x] enter / child <%s> / parent <%s> / cycle %d\n", |
---|
| 3178 | __FUNCTION__, this->process->pid, this->trdid, name, |
---|
| 3179 | parent_name, (uint32_t)hal_get_cycles() ); |
---|
[433] | 3180 | #endif |
---|
[279] | 3181 | |
---|
[610] | 3182 | // 1. create dentry in parent cluster |
---|
| 3183 | if( parent_cxy == local_cxy ) // parent cluster is local |
---|
[1] | 3184 | { |
---|
[23] | 3185 | error = vfs_dentry_create( fs_type, |
---|
[1] | 3186 | name, |
---|
[602] | 3187 | &new_dentry_xp ); |
---|
[1] | 3188 | } |
---|
[610] | 3189 | else // parent cluster is remote |
---|
[1] | 3190 | { |
---|
[610] | 3191 | rpc_vfs_dentry_create_client( parent_cxy, |
---|
[23] | 3192 | fs_type, |
---|
[1] | 3193 | name, |
---|
[602] | 3194 | &new_dentry_xp, |
---|
[1] | 3195 | &error ); |
---|
| 3196 | } |
---|
| 3197 | |
---|
| 3198 | if( error ) |
---|
| 3199 | { |
---|
[437] | 3200 | printk("\n[ERROR] in %s : cannot create dentry <%s> in cluster %x\n", |
---|
[610] | 3201 | __FUNCTION__ , name , parent_cxy ); |
---|
[602] | 3202 | return -1; |
---|
[1] | 3203 | } |
---|
| 3204 | |
---|
[602] | 3205 | // get dentry local pointer |
---|
| 3206 | new_dentry_ptr = GET_PTR( new_dentry_xp ); |
---|
| 3207 | |
---|
[568] | 3208 | #if(DEBUG_VFS_ADD_CHILD & 1) |
---|
| 3209 | if( DEBUG_VFS_ADD_CHILD < cycle ) |
---|
[610] | 3210 | printk("\n[%s] thread[%x,%x] / dentry <%s> created (%x,%x)\n", |
---|
| 3211 | __FUNCTION__, this->process->pid, this->trdid, name, parent_cxy, new_dentry_ptr ); |
---|
[568] | 3212 | #endif |
---|
| 3213 | |
---|
[610] | 3214 | // 2. create child inode in child cluster |
---|
| 3215 | // TODO : define attr / mode / uid / gid |
---|
[1] | 3216 | uint32_t attr = 0; |
---|
| 3217 | uint32_t mode = 0; |
---|
| 3218 | uint32_t uid = 0; |
---|
| 3219 | uint32_t gid = 0; |
---|
| 3220 | |
---|
[610] | 3221 | if( child_cxy == local_cxy ) // child cluster is local |
---|
[1] | 3222 | { |
---|
[610] | 3223 | error = vfs_inode_create( fs_type, |
---|
[1] | 3224 | attr, |
---|
| 3225 | mode, |
---|
| 3226 | uid, |
---|
| 3227 | gid, |
---|
[602] | 3228 | &new_inode_xp ); |
---|
[1] | 3229 | } |
---|
| 3230 | else // child cluster is remote |
---|
| 3231 | { |
---|
[610] | 3232 | rpc_vfs_inode_create_client( child_cxy, |
---|
[23] | 3233 | fs_type, |
---|
[1] | 3234 | attr, |
---|
| 3235 | mode, |
---|
| 3236 | uid, |
---|
| 3237 | gid, |
---|
[602] | 3238 | &new_inode_xp, |
---|
[1] | 3239 | &error ); |
---|
| 3240 | } |
---|
| 3241 | |
---|
| 3242 | if( error ) |
---|
| 3243 | { |
---|
| 3244 | printk("\n[ERROR] in %s : cannot create inode in cluster %x\n", |
---|
[610] | 3245 | __FUNCTION__ , child_cxy ); |
---|
[1] | 3246 | |
---|
[610] | 3247 | if( parent_cxy == local_cxy ) vfs_dentry_destroy( new_dentry_ptr ); |
---|
| 3248 | else rpc_vfs_dentry_destroy_client( parent_cxy , new_dentry_ptr ); |
---|
[602] | 3249 | return -1; |
---|
[1] | 3250 | } |
---|
| 3251 | |
---|
[610] | 3252 | // get new inode local pointer |
---|
| 3253 | new_inode_ptr = GET_PTR( new_inode_xp ); |
---|
| 3254 | |
---|
[568] | 3255 | #if(DEBUG_VFS_ADD_CHILD & 1) |
---|
| 3256 | if( DEBUG_VFS_ADD_CHILD < cycle ) |
---|
[610] | 3257 | printk("\n[%s] thread[%x,%x] / inode <%s> created (%x,%x)\n", |
---|
| 3258 | __FUNCTION__ , this->process->pid, this->trdid, name , child_cxy, new_inode_ptr ); |
---|
[568] | 3259 | #endif |
---|
| 3260 | |
---|
[610] | 3261 | // 3. register new_dentry in new_inode xlist of parents |
---|
| 3262 | parents_root_xp = XPTR( child_cxy , &new_inode_ptr->parents ); |
---|
| 3263 | parents_entry_xp = XPTR( parent_cxy, &new_dentry_ptr->parents ); |
---|
| 3264 | xlist_add_first( parents_root_xp , parents_entry_xp ); |
---|
| 3265 | hal_remote_atomic_add( XPTR( child_cxy , &new_inode_ptr->links ) , 1 ); |
---|
[204] | 3266 | |
---|
[610] | 3267 | #if(DEBUG_VFS_ADD_CHILD & 1) |
---|
[611] | 3268 | if( DEBUG_VFS_ADD_CHILD < cycle ) |
---|
[610] | 3269 | printk("\n[%s] thread[%x,%x] / dentry (%x,%x) registered in child inode (%x,%x)\n", |
---|
| 3270 | __FUNCTION__, this->process->pid, this->trdid, |
---|
| 3271 | parent_cxy, new_dentry_ptr, child_cxy, new_inode_ptr ); |
---|
| 3272 | #endif |
---|
| 3273 | |
---|
[611] | 3274 | // register new_dentry in parent_inode xhtab of children |
---|
[610] | 3275 | children_xhtab_xp = XPTR( parent_cxy , &parent_inode_ptr->children ); |
---|
| 3276 | children_entry_xp = XPTR( parent_cxy , &new_dentry_ptr->children ); |
---|
| 3277 | xhtab_insert( children_xhtab_xp , name , children_entry_xp ); |
---|
| 3278 | |
---|
| 3279 | #if(DEBUG_VFS_ADD_CHILD & 1) |
---|
| 3280 | if( DEBUG_VFS_ADD_CHILD < cycle ) |
---|
| 3281 | printk("\n[%s] thread[%x,%x] / dentry (%x,%x) registered in parent inode (%x,%x)\n", |
---|
| 3282 | __FUNCTION__, this->process->pid, this->trdid, |
---|
| 3283 | parent_cxy, new_dentry_ptr, parent_cxy, parent_inode_ptr ); |
---|
| 3284 | #endif |
---|
| 3285 | |
---|
[611] | 3286 | // update "parent" and "child_xp" fields in new_dentry |
---|
[610] | 3287 | hal_remote_s64( XPTR( parent_cxy , &new_dentry_ptr->child_xp ) , new_inode_xp ); |
---|
| 3288 | hal_remote_spt( XPTR( parent_cxy , &new_dentry_ptr->parent ) , parent_inode_ptr ); |
---|
| 3289 | |
---|
[438] | 3290 | #if DEBUG_VFS_ADD_CHILD |
---|
[433] | 3291 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 3292 | if( DEBUG_VFS_ADD_CHILD < cycle ) |
---|
[598] | 3293 | printk("\n[%s] thread[%x,%x] exit for <%s> / cycle %d\n", |
---|
| 3294 | __FUNCTION__, this->process->pid, this->trdid, name, (uint32_t)hal_get_cycles() ); |
---|
[433] | 3295 | #endif |
---|
[296] | 3296 | |
---|
[602] | 3297 | // return extended pointer on dentry & child inode |
---|
[610] | 3298 | *child_dentry_xp = new_dentry_xp; |
---|
| 3299 | *child_inode_xp = new_inode_xp; |
---|
[1] | 3300 | return 0; |
---|
| 3301 | |
---|
| 3302 | } // end vfs_add_child_in_parent() |
---|
| 3303 | |
---|
[610] | 3304 | ///////////////////////////////////////////////////// |
---|
| 3305 | void vfs_remove_child_from_parent( xptr_t dentry_xp ) |
---|
[459] | 3306 | { |
---|
[610] | 3307 | cxy_t parent_cxy; // parent inode cluster identifier |
---|
| 3308 | cxy_t child_cxy; // child inode cluster identifier |
---|
| 3309 | vfs_dentry_t * dentry_ptr; // local pointer on dentry |
---|
| 3310 | xptr_t child_inode_xp; // extended pointer on child inode |
---|
| 3311 | vfs_inode_t * child_inode_ptr; // local pointer on child inode |
---|
| 3312 | vfs_inode_t * parent_inode_ptr; // local pointer on parent inode |
---|
| 3313 | uint32_t links; // number of child inode parents |
---|
| 3314 | |
---|
| 3315 | char dentry_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
[459] | 3316 | |
---|
[610] | 3317 | // get parent cluster and dentry local pointer |
---|
| 3318 | parent_cxy = GET_CXY( dentry_xp ); |
---|
[459] | 3319 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
| 3320 | |
---|
[610] | 3321 | // get a local copy of dentry name |
---|
| 3322 | hal_remote_strcpy( XPTR( local_cxy , dentry_name ), |
---|
| 3323 | XPTR( parent_cxy , &dentry_ptr->name ) ); |
---|
[459] | 3324 | |
---|
[610] | 3325 | // get parent_inode local pointer |
---|
| 3326 | parent_inode_ptr = hal_remote_lpt( XPTR( parent_cxy , &dentry_ptr->parent ) ); |
---|
| 3327 | |
---|
| 3328 | // get child cluster and child_inode pointers |
---|
| 3329 | child_inode_xp = hal_remote_l64( XPTR( parent_cxy , &dentry_ptr->child_xp ) ); |
---|
| 3330 | child_cxy = GET_CXY( child_inode_xp ); |
---|
| 3331 | child_inode_ptr = GET_PTR( child_inode_xp ); |
---|
[602] | 3332 | |
---|
[610] | 3333 | // remove dentry from parent_inode |
---|
| 3334 | xhtab_remove( XPTR( parent_cxy , &parent_inode_ptr->children ), |
---|
| 3335 | dentry_name, |
---|
| 3336 | XPTR( parent_cxy , &dentry_ptr->children ) ); |
---|
[602] | 3337 | |
---|
[610] | 3338 | // remove dentry from child_inode |
---|
| 3339 | xlist_unlink( XPTR( parent_cxy , &dentry_ptr->parents ) ); |
---|
| 3340 | links = hal_remote_atomic_add( XPTR( child_cxy , &child_inode_ptr->links ) , -1 ); |
---|
| 3341 | |
---|
| 3342 | // delete dentry descriptor |
---|
| 3343 | if( parent_cxy == local_cxy ) |
---|
[459] | 3344 | { |
---|
[602] | 3345 | vfs_dentry_destroy( dentry_ptr ); |
---|
[459] | 3346 | } |
---|
| 3347 | else |
---|
| 3348 | { |
---|
[610] | 3349 | rpc_vfs_dentry_destroy_client( parent_cxy, |
---|
[602] | 3350 | dentry_ptr ); |
---|
[459] | 3351 | } |
---|
| 3352 | |
---|
[610] | 3353 | // delete child_inode descriptor if last link |
---|
| 3354 | if( links == 1 ) |
---|
[459] | 3355 | { |
---|
[610] | 3356 | if( child_cxy == local_cxy ) |
---|
| 3357 | { |
---|
| 3358 | vfs_inode_destroy( child_inode_ptr ); |
---|
| 3359 | } |
---|
| 3360 | else |
---|
| 3361 | { |
---|
| 3362 | rpc_vfs_inode_destroy_client( child_cxy , child_inode_ptr ); |
---|
| 3363 | } |
---|
[459] | 3364 | } |
---|
| 3365 | |
---|
| 3366 | } // end vfs_remove_child_from_parent() |
---|
| 3367 | |
---|
[612] | 3368 | |
---|
| 3369 | |
---|
| 3370 | |
---|
[23] | 3371 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
[602] | 3372 | // API used by VFS to access a specific FS |
---|
[23] | 3373 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 3374 | |
---|
[614] | 3375 | ////////////////////////////////////////////// |
---|
| 3376 | error_t vfs_fs_move_page( xptr_t page_xp, |
---|
| 3377 | cmd_type_t cmd_type ) |
---|
[23] | 3378 | { |
---|
[204] | 3379 | error_t error = 0; |
---|
[23] | 3380 | |
---|
[602] | 3381 | assert( (page_xp != XPTR_NULL) , "page pointer is NULL\n" ); |
---|
[23] | 3382 | |
---|
[602] | 3383 | page_t * page_ptr = GET_PTR( page_xp ); |
---|
| 3384 | cxy_t page_cxy = GET_CXY( page_xp ); |
---|
[23] | 3385 | |
---|
[602] | 3386 | // get local pointer on page mapper |
---|
| 3387 | mapper_t * mapper = hal_remote_lpt( XPTR( page_cxy , &page_ptr->mapper ) ); |
---|
[23] | 3388 | |
---|
[602] | 3389 | assert( (mapper != NULL) , "no mapper for page\n" ); |
---|
[246] | 3390 | |
---|
[23] | 3391 | // get FS type |
---|
[602] | 3392 | vfs_fs_type_t fs_type = hal_remote_l32( XPTR( page_cxy , &mapper->type ) ); |
---|
[23] | 3393 | |
---|
[238] | 3394 | // call relevant FS function |
---|
[23] | 3395 | if( fs_type == FS_TYPE_FATFS ) |
---|
| 3396 | { |
---|
[614] | 3397 | error = fatfs_move_page( page_xp , cmd_type ); |
---|
[602] | 3398 | } |
---|
| 3399 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
| 3400 | { |
---|
| 3401 | assert( false , "should not be called for RAMFS\n" ); |
---|
| 3402 | } |
---|
| 3403 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
| 3404 | { |
---|
| 3405 | assert( false , "should not be called for DEVFS\n" ); |
---|
| 3406 | } |
---|
| 3407 | else |
---|
| 3408 | { |
---|
| 3409 | assert( false , "undefined file system type\n" ); |
---|
| 3410 | } |
---|
[568] | 3411 | |
---|
[602] | 3412 | return error; |
---|
[568] | 3413 | |
---|
[602] | 3414 | } // end vfs_fs_move_page() |
---|
| 3415 | |
---|
| 3416 | //////////////////////////////////////////////// |
---|
| 3417 | error_t vfs_fs_add_dentry( vfs_inode_t * inode, |
---|
| 3418 | vfs_dentry_t * dentry ) |
---|
| 3419 | { |
---|
| 3420 | error_t error = 0; |
---|
| 3421 | |
---|
| 3422 | assert( (inode != NULL) , "inode pointer is NULL\n" ); |
---|
| 3423 | assert( (dentry != NULL) , "dentry pointer is NULL\n" ); |
---|
| 3424 | |
---|
| 3425 | mapper_t * mapper = inode->mapper; |
---|
| 3426 | |
---|
| 3427 | assert( (mapper != NULL) , "mapper pointer is NULL\n" ); |
---|
| 3428 | |
---|
| 3429 | // get FS type |
---|
| 3430 | vfs_fs_type_t fs_type = mapper->type; |
---|
| 3431 | |
---|
| 3432 | // call relevant FS function |
---|
| 3433 | if( fs_type == FS_TYPE_FATFS ) |
---|
| 3434 | { |
---|
| 3435 | error = fatfs_add_dentry( inode , dentry ); |
---|
[23] | 3436 | } |
---|
| 3437 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
| 3438 | { |
---|
[612] | 3439 | error = 0; // does nothing for RAMFS |
---|
[23] | 3440 | } |
---|
| 3441 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
| 3442 | { |
---|
[612] | 3443 | error = 0; // does nothing for DEVFS |
---|
[23] | 3444 | } |
---|
| 3445 | else |
---|
| 3446 | { |
---|
[492] | 3447 | assert( false , "undefined file system type\n" ); |
---|
[23] | 3448 | } |
---|
| 3449 | |
---|
| 3450 | return error; |
---|
| 3451 | |
---|
[602] | 3452 | } // end vfs_fs_add_dentry() |
---|
[23] | 3453 | |
---|
[602] | 3454 | /////////////////////////////////////////////////// |
---|
| 3455 | error_t vfs_fs_remove_dentry( vfs_inode_t * inode, |
---|
| 3456 | vfs_dentry_t * dentry ) |
---|
[23] | 3457 | { |
---|
[602] | 3458 | error_t error = 0; |
---|
[23] | 3459 | |
---|
[602] | 3460 | assert( (inode != NULL) , "inode pointer is NULL\n" ); |
---|
| 3461 | assert( (dentry != NULL) , "dentry pointer is NULL\n" ); |
---|
[23] | 3462 | |
---|
[238] | 3463 | mapper_t * mapper = inode->mapper; |
---|
[23] | 3464 | |
---|
[598] | 3465 | assert( (mapper != NULL) , "mapper pointer is NULL\n" ); |
---|
[23] | 3466 | |
---|
[602] | 3467 | // get FS type |
---|
| 3468 | vfs_fs_type_t fs_type = mapper->type; |
---|
[401] | 3469 | |
---|
[602] | 3470 | // call relevant FS function |
---|
| 3471 | if( fs_type == FS_TYPE_FATFS ) |
---|
| 3472 | { |
---|
| 3473 | error = fatfs_remove_dentry( inode , dentry ); |
---|
| 3474 | } |
---|
| 3475 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
| 3476 | { |
---|
[612] | 3477 | error = 0; // does nothing for RAMFS |
---|
[602] | 3478 | } |
---|
| 3479 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
| 3480 | { |
---|
[612] | 3481 | error = 0; // does nothing for DEVFS |
---|
[602] | 3482 | } |
---|
| 3483 | else |
---|
| 3484 | { |
---|
| 3485 | assert( false , "undefined file system type\n" ); |
---|
| 3486 | } |
---|
[238] | 3487 | |
---|
[602] | 3488 | return error; |
---|
| 3489 | |
---|
| 3490 | } // end vfs_fs_remove_dentry() |
---|
| 3491 | |
---|
| 3492 | //////////////////////////////////////////////// |
---|
[623] | 3493 | error_t vfs_fs_new_dentry( vfs_inode_t * parent, |
---|
[602] | 3494 | char * name, |
---|
| 3495 | xptr_t child_xp ) |
---|
| 3496 | { |
---|
| 3497 | error_t error = 0; |
---|
| 3498 | |
---|
| 3499 | // check arguments |
---|
| 3500 | assert( (parent != NULL) , "parent pointer is NULL\n"); |
---|
| 3501 | assert( (child_xp != XPTR_NULL) , "child pointer is NULL\n"); |
---|
| 3502 | |
---|
| 3503 | // get parent inode FS type |
---|
| 3504 | vfs_fs_type_t fs_type = parent->ctx->type; |
---|
| 3505 | |
---|
| 3506 | // call relevant FS function |
---|
| 3507 | if( fs_type == FS_TYPE_FATFS ) |
---|
[23] | 3508 | { |
---|
[623] | 3509 | error = fatfs_new_dentry( parent , name , child_xp ); |
---|
[602] | 3510 | } |
---|
| 3511 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
| 3512 | { |
---|
| 3513 | assert( false , "should not be called for RAMFS\n" ); |
---|
| 3514 | } |
---|
| 3515 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
| 3516 | { |
---|
| 3517 | assert( false , "should not be called for DEVFS\n" ); |
---|
| 3518 | } |
---|
| 3519 | else |
---|
| 3520 | { |
---|
| 3521 | assert( false , "undefined file system type\n" ); |
---|
| 3522 | } |
---|
[23] | 3523 | |
---|
[602] | 3524 | return error; |
---|
| 3525 | |
---|
[623] | 3526 | } // end vfs_fs_new_dentry() |
---|
[602] | 3527 | |
---|
[612] | 3528 | /////////////////////////////////////////////////// |
---|
[623] | 3529 | error_t vfs_fs_update_dentry( vfs_inode_t * inode, |
---|
| 3530 | vfs_dentry_t * dentry, |
---|
| 3531 | uint32_t size ) |
---|
| 3532 | { |
---|
| 3533 | error_t error = 0; |
---|
| 3534 | |
---|
| 3535 | // check arguments |
---|
| 3536 | assert( (inode != NULL) , "inode pointer is NULL\n"); |
---|
| 3537 | assert( (dentry != NULL) , "dentry pointer is NULL\n"); |
---|
| 3538 | |
---|
| 3539 | // get parent inode FS type |
---|
| 3540 | vfs_fs_type_t fs_type = inode->ctx->type; |
---|
| 3541 | |
---|
| 3542 | // call relevant FS function |
---|
| 3543 | if( fs_type == FS_TYPE_FATFS ) |
---|
| 3544 | { |
---|
| 3545 | error = fatfs_update_dentry( inode , dentry , size ); |
---|
| 3546 | } |
---|
| 3547 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
| 3548 | { |
---|
| 3549 | assert( false , "should not be called for RAMFS\n" ); |
---|
| 3550 | } |
---|
| 3551 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
| 3552 | { |
---|
| 3553 | assert( false , "should not be called for DEVFS\n" ); |
---|
| 3554 | } |
---|
| 3555 | else |
---|
| 3556 | { |
---|
| 3557 | assert( false , "undefined file system type\n" ); |
---|
| 3558 | } |
---|
| 3559 | |
---|
| 3560 | return error; |
---|
| 3561 | |
---|
| 3562 | } // end vfs_fs_update_dentry() |
---|
| 3563 | |
---|
| 3564 | /////////////////////////////////////////////////// |
---|
[612] | 3565 | error_t vfs_fs_get_user_dir( vfs_inode_t * inode, |
---|
| 3566 | struct dirent * array, |
---|
| 3567 | uint32_t max_dirent, |
---|
| 3568 | uint32_t min_dentry, |
---|
| 3569 | bool_t detailed, |
---|
| 3570 | uint32_t * entries, |
---|
| 3571 | bool_t * done ) |
---|
| 3572 | { |
---|
| 3573 | error_t error = 0; |
---|
| 3574 | |
---|
| 3575 | // check arguments |
---|
| 3576 | assert( (inode != NULL) , "parent pointer is NULL\n"); |
---|
| 3577 | assert( (array != NULL) , "child pointer is NULL\n"); |
---|
| 3578 | assert( (detailed == false) , "detailed argument not supported\n"); |
---|
| 3579 | |
---|
| 3580 | // check inode type |
---|
| 3581 | if( inode->type != INODE_TYPE_DIR ) |
---|
| 3582 | { |
---|
| 3583 | printk("\n[ERROR] in %s : target inode is not a directory\n", |
---|
| 3584 | __FUNCTION__ ); |
---|
| 3585 | return -1; |
---|
| 3586 | } |
---|
| 3587 | |
---|
| 3588 | // get parent inode FS type |
---|
| 3589 | vfs_fs_type_t fs_type = inode->ctx->type; |
---|
| 3590 | |
---|
| 3591 | // call relevant FS function |
---|
| 3592 | if( fs_type == FS_TYPE_FATFS ) |
---|
| 3593 | { |
---|
| 3594 | error = fatfs_get_user_dir( inode, |
---|
| 3595 | array, |
---|
| 3596 | max_dirent, |
---|
| 3597 | min_dentry, |
---|
| 3598 | detailed, |
---|
| 3599 | entries, |
---|
| 3600 | done ); |
---|
| 3601 | } |
---|
| 3602 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
| 3603 | { |
---|
| 3604 | assert( false , "should not be called for RAMFS\n" ); |
---|
| 3605 | } |
---|
| 3606 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
| 3607 | { |
---|
| 3608 | error = devfs_get_user_dir( inode, |
---|
| 3609 | array, |
---|
| 3610 | max_dirent, |
---|
| 3611 | min_dentry, |
---|
| 3612 | detailed, |
---|
| 3613 | entries, |
---|
| 3614 | done ); |
---|
| 3615 | } |
---|
| 3616 | else |
---|
| 3617 | { |
---|
| 3618 | assert( false , "undefined file system type\n" ); |
---|
| 3619 | } |
---|
| 3620 | |
---|
| 3621 | return error; |
---|
| 3622 | |
---|
| 3623 | } // end vfs_fs_get_user_dir() |
---|
| 3624 | |
---|
[610] | 3625 | //////////////////////////////////////////////// |
---|
| 3626 | error_t vfs_fs_sync_inode( vfs_inode_t * inode ) |
---|
| 3627 | { |
---|
| 3628 | error_t error = 0; |
---|
| 3629 | |
---|
| 3630 | // check arguments |
---|
| 3631 | assert( (inode != NULL) , "inode pointer is NULL\n"); |
---|
| 3632 | |
---|
| 3633 | // get inode FS type |
---|
| 3634 | vfs_fs_type_t fs_type = inode->ctx->type; |
---|
| 3635 | |
---|
| 3636 | // call relevant FS function |
---|
| 3637 | if( fs_type == FS_TYPE_FATFS ) |
---|
| 3638 | { |
---|
| 3639 | error = fatfs_sync_inode( inode ); |
---|
| 3640 | } |
---|
| 3641 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
| 3642 | { |
---|
| 3643 | assert( false , "should not be called for RAMFS\n" ); |
---|
| 3644 | } |
---|
| 3645 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
| 3646 | { |
---|
| 3647 | assert( false , "should not be called for DEVFS\n" ); |
---|
| 3648 | } |
---|
| 3649 | else |
---|
| 3650 | { |
---|
| 3651 | assert( false , "undefined file system type\n" ); |
---|
| 3652 | } |
---|
| 3653 | |
---|
| 3654 | return error; |
---|
| 3655 | |
---|
| 3656 | } // end vfs_fs_sync_inode() |
---|
| 3657 | |
---|
| 3658 | //////////////////////////////////////////////// |
---|
| 3659 | error_t vfs_fs_sync_fat( vfs_fs_type_t fs_type ) |
---|
| 3660 | { |
---|
| 3661 | error_t error = 0; |
---|
| 3662 | |
---|
| 3663 | // call relevant FS function |
---|
| 3664 | if( fs_type == FS_TYPE_FATFS ) |
---|
| 3665 | { |
---|
| 3666 | error = fatfs_sync_fat(); |
---|
| 3667 | } |
---|
| 3668 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
| 3669 | { |
---|
| 3670 | assert( false , "should not be called for RAMFS\n" ); |
---|
| 3671 | } |
---|
| 3672 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
| 3673 | { |
---|
| 3674 | assert( false , "should not be called for DEVFS\n" ); |
---|
| 3675 | } |
---|
| 3676 | else |
---|
| 3677 | { |
---|
| 3678 | assert( false , "undefined file system type\n" ); |
---|
| 3679 | } |
---|
| 3680 | |
---|
| 3681 | return error; |
---|
| 3682 | |
---|
| 3683 | } // end vfs_fs_sync_fat() |
---|
| 3684 | |
---|
| 3685 | ////////////////////////////////////////////////////// |
---|
| 3686 | error_t vfs_fs_sync_free_info( vfs_fs_type_t fs_type ) |
---|
| 3687 | { |
---|
| 3688 | error_t error = 0; |
---|
| 3689 | |
---|
| 3690 | // call relevant FS function |
---|
| 3691 | if( fs_type == FS_TYPE_FATFS ) |
---|
| 3692 | { |
---|
| 3693 | error = fatfs_sync_free_info(); |
---|
| 3694 | } |
---|
| 3695 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
| 3696 | { |
---|
| 3697 | assert( false , "should not be called for RAMFS\n" ); |
---|
| 3698 | } |
---|
| 3699 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
| 3700 | { |
---|
| 3701 | assert( false , "should not be called for DEVFS\n" ); |
---|
| 3702 | } |
---|
| 3703 | else |
---|
| 3704 | { |
---|
| 3705 | assert( false , "undefined file system type\n" ); |
---|
| 3706 | } |
---|
| 3707 | |
---|
| 3708 | return error; |
---|
| 3709 | |
---|
| 3710 | } // end vfs_fs_sync_fat() |
---|
| 3711 | |
---|
[602] | 3712 | ///////////////////////////////////////////////// |
---|
| 3713 | error_t vfs_fs_cluster_alloc( uint32_t fs_type, |
---|
| 3714 | uint32_t * cluster ) |
---|
| 3715 | { |
---|
| 3716 | error_t error = 0; |
---|
| 3717 | |
---|
| 3718 | // call relevant FS function |
---|
| 3719 | if( fs_type == FS_TYPE_FATFS ) |
---|
| 3720 | { |
---|
| 3721 | error = fatfs_cluster_alloc( cluster ); |
---|
[23] | 3722 | } |
---|
[602] | 3723 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
| 3724 | { |
---|
| 3725 | assert( false , "should not be called for RAMFS\n" ); |
---|
| 3726 | } |
---|
| 3727 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
| 3728 | { |
---|
| 3729 | assert( false , "should not be called for DEVFS\n" ); |
---|
| 3730 | } |
---|
| 3731 | else |
---|
| 3732 | { |
---|
| 3733 | assert( false , "undefined file system type\n" ); |
---|
| 3734 | } |
---|
[23] | 3735 | |
---|
[602] | 3736 | return error; |
---|
[401] | 3737 | |
---|
[602] | 3738 | } // end vfs_fs_alloc_cluster() |
---|
[23] | 3739 | |
---|
[602] | 3740 | //////////////////////////////////////////////// |
---|
| 3741 | error_t vfs_fs_release_inode( xptr_t inode_xp ) |
---|
| 3742 | { |
---|
| 3743 | error_t error = 0; |
---|
[23] | 3744 | |
---|
[602] | 3745 | assert( (inode_xp != XPTR_NULL) , "inode pointer is NULL\n") |
---|
| 3746 | |
---|
| 3747 | vfs_inode_t * inode_ptr = GET_PTR( inode_xp ); |
---|
| 3748 | cxy_t inode_cxy = GET_CXY( inode_xp ); |
---|
| 3749 | |
---|
| 3750 | // get local pointer on page mapper |
---|
| 3751 | mapper_t * mapper = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->mapper ) ); |
---|
| 3752 | |
---|
| 3753 | assert( (mapper != NULL) , "mapper pointer is NULL\n") |
---|
| 3754 | |
---|
| 3755 | // get FS type from mapper |
---|
| 3756 | vfs_fs_type_t fs_type = hal_remote_l32( XPTR( inode_cxy , &mapper->type ) ); |
---|
| 3757 | |
---|
| 3758 | // call relevant FS function |
---|
| 3759 | if( fs_type == FS_TYPE_FATFS ) |
---|
| 3760 | { |
---|
| 3761 | error = fatfs_release_inode( inode_xp ); |
---|
| 3762 | } |
---|
| 3763 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
| 3764 | { |
---|
| 3765 | assert( false , "should not be called for RAMFS\n" ); |
---|
| 3766 | } |
---|
| 3767 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
| 3768 | { |
---|
| 3769 | assert( false , "should not be called for DEVFS\n" ); |
---|
| 3770 | } |
---|
| 3771 | else |
---|
| 3772 | { |
---|
| 3773 | assert( false , "undefined file system type\n" ); |
---|
| 3774 | } |
---|
| 3775 | |
---|
| 3776 | return error; |
---|
| 3777 | |
---|
| 3778 | } // end vfs_fs_release_inode() |
---|
| 3779 | |
---|
| 3780 | |
---|