Changes between Version 2 and Version 3 of file_system


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Timestamp:
Jan 11, 2020, 9:21:42 PM (4 years ago)
Author:
alain
Comment:

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  • file_system

    v2 v3  
    77As most POSIX compliant operating systems,  ALMOS-MKH sees the external storage device as an array of clusters, where each clusters can store one page of 4 Kbytes. Each cluster occupies eight  512 bytes physical sectors, and is indexed by a cluster identifier, calledd ''cluster_id''.
    88
    9 To support various File System types, ALMOS-MKH defines a generic Virtual File System API defined in the
    10  [https://www-soc.lip6.fr/trac/almos-mkh/browser/trunk/kernel/fs/vfs.c  almos-mkh/kernel/fs/vfs.c] et [https://www-soc.lip6.fr/trac/almos-mkh/browser/trunk/kernel/fs/vfs.h almos-mkh/kernel/fs/vfs.h] files.
     9To support various File System types, ALMOS-MKH defines a generic Virtual File System API defined in the [https://www-soc.lip6.fr/trac/almos-mkh/browser/trunk/kernel/fs/vfs.c  almos-mkh/kernel/fs/vfs.c], and [https://www-soc.lip6.fr/trac/almos-mkh/browser/trunk/kernel/fs/vfs.h almos-mkh/kernel/fs/vfs.h] files.
    1110
    1211All supported fille systems are supposed to have a hierarchical tree_based structure, where some special ''directory'' files contain ''links''  to other files that can be ''directory'' files, or ''terminal'' files. Therefore, any file X in the file system can be unambiguously defined by a ''pathname'' describing the path from the VFS root to the X file. A ''directory'' file has only on single path name, but a ''terminal'' file can have several ''parent'' directories, defining several path names for one single file.