docs: filesystems: convert hpfs.txt to ReST
- Add a SPDX header; - Adjust document and section titles; - Some whitespace fixes and new line breaks; - Mark literal blocks as such; - Add table markups; - Add it to filesystems/index.rst. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/581019c3120938118aa55ba28902b62083c3f37a.1581955849.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Mauro Carvalho Chehab
Jonathan Corbet
Родитель
5040a0acc8
Коммит
a1ef4bcd16
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@ -1,13 +1,21 @@
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.. SPDX-License-Identifier: GPL-2.0
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====================
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Read/Write HPFS 2.09
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====================
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1998-2004, Mikulas Patocka
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email: mikulas@artax.karlin.mff.cuni.cz
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homepage: http://artax.karlin.mff.cuni.cz/~mikulas/vyplody/hpfs/index-e.cgi
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:email: mikulas@artax.karlin.mff.cuni.cz
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:homepage: http://artax.karlin.mff.cuni.cz/~mikulas/vyplody/hpfs/index-e.cgi
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CREDITS:
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Credits
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=======
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Chris Smith, 1993, original read-only HPFS, some code and hpfs structures file
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is taken from it
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Jacques Gelinas, MSDos mmap, Inspired by fs/nfs/mmap.c (Jon Tombs 15 Aug 1993)
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Werner Almesberger, 1992, 1993, MSDos option parser & CR/LF conversion
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Mount options
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@ -50,6 +58,7 @@ timeshift=(-)nnn (default 0)
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File names
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==========
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As in OS/2, filenames are case insensitive. However, shell thinks that names
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are case sensitive, so for example when you create a file FOO, you can use
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@ -64,6 +73,7 @@ access it under names 'a.', 'a..', 'a . . . ' etc.
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Extended attributes
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===================
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On HPFS partitions, OS/2 can associate to each file a special information called
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extended attributes. Extended attributes are pairs of (key,value) where key is
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@ -88,6 +98,7 @@ values doesn't work.
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Symlinks
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========
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You can do symlinks on HPFS partition, symlinks are achieved by setting extended
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attribute named "SYMLINK" with symlink value. Like on ext2, you can chown and
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@ -101,6 +112,7 @@ to analyze or change OS2SYS.INI.
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Codepages
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=========
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HPFS can contain several uppercasing tables for several codepages and each
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file has a pointer to codepage its name is in. However OS/2 was created in
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@ -128,6 +140,7 @@ this codepage - if you don't try to do what I described above :-)
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Known bugs
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==========
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HPFS386 on OS/2 server is not supported. HPFS386 installed on normal OS/2 client
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should work. If you have OS/2 server, use only read-only mode. I don't know how
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@ -152,7 +165,8 @@ would result in directory tree splitting, that takes disk space. Workaround is
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to delete other files that are leaf (probability that the file is non-leaf is
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about 1/50) or to truncate file first to make some space.
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You encounter this problem only if you have many directories so that
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preallocated directory band is full i.e.
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preallocated directory band is full i.e.::
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number_of_directories / size_of_filesystem_in_mb > 4.
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You can't delete open directories.
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@ -174,6 +188,7 @@ anybody know what does it mean?
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What does "unbalanced tree" message mean?
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=========================================
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Old versions of this driver created sometimes unbalanced dnode trees. OS/2
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chkdsk doesn't scream if the tree is unbalanced (and sometimes creates
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@ -187,6 +202,7 @@ whole created by this driver, it is BUG - let me know about it.
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Bugs in OS/2
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============
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When you have two (or more) lost directories pointing each to other, chkdsk
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locks up when repairing filesystem.
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@ -199,98 +215,139 @@ File names like "a .b" are marked as 'long' by OS/2 but chkdsk "corrects" it and
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marks them as short (and writes "minor fs error corrected"). This bug is not in
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HPFS386.
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Codepage bugs described above.
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Codepage bugs described above
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=============================
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If you don't install fixpacks, there are many, many more...
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History
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=======
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0.90 First public release
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0.91 Fixed bug that caused shooting to memory when write_inode was called on
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open inode (rarely happened)
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0.92 Fixed a little memory leak in freeing directory inodes
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0.93 Fixed bug that locked up the machine when there were too many filenames
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with first 15 characters same
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Fixed write_file to zero file when writing behind file end
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0.94 Fixed a little memory leak when trying to delete busy file or directory
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0.95 Fixed a bug that i_hpfs_parent_dir was not updated when moving files
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1.90 First version for 2.1.1xx kernels
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1.91 Fixed a bug that chk_sectors failed when sectors were at the end of disk
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Fixed a race-condition when write_inode is called while deleting file
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Fixed a bug that could possibly happen (with very low probability) when
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using 0xff in filenames
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Rewritten locking to avoid race-conditions
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Mount option 'eas' now works
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Fsync no longer returns error
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Files beginning with '.' are marked hidden
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Remount support added
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Alloc is not so slow when filesystem becomes full
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Atimes are no more updated because it slows down operation
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Code cleanup (removed all commented debug prints)
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1.92 Corrected a bug when sync was called just before closing file
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1.93 Modified, so that it works with kernels >= 2.1.131, I don't know if it
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works with previous versions
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Fixed a possible problem with disks > 64G (but I don't have one, so I can't
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test it)
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Fixed a file overflow at 2G
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Added new option 'timeshift'
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Changed behaviour on HPFS386: It is now possible to operate on HPFS386 in
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read-only mode
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Fixed a bug that slowed down alloc and prevented allocating 100% space
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(this bug was not destructive)
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1.94 Added workaround for one bug in Linux
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Fixed one buffer leak
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Fixed some incompatibilities with large extended attributes (but it's still
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not 100% ok, I have no info on it and OS/2 doesn't want to create them)
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Rewritten allocation
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Fixed a bug with i_blocks (du sometimes didn't display correct values)
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Directories have no longer archive attribute set (some programs don't like
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it)
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Fixed a bug that it set badly one flag in large anode tree (it was not
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destructive)
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1.95 Fixed one buffer leak, that could happen on corrupted filesystem
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Fixed one bug in allocation in 1.94
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1.96 Added workaround for one bug in OS/2 (HPFS locked up, HPFS386 reported
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error sometimes when opening directories in PMSHELL)
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Fixed a possible bitmap race
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Fixed possible problem on large disks
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You can now delete open files
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Fixed a nondestructive race in rename
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1.97 Support for HPFS v3 (on large partitions)
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Fixed a bug that it didn't allow creation of files > 128M (it should be 2G)
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====== =========================================================================
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0.90 First public release
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0.91 Fixed bug that caused shooting to memory when write_inode was called on
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open inode (rarely happened)
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0.92 Fixed a little memory leak in freeing directory inodes
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0.93 Fixed bug that locked up the machine when there were too many filenames
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with first 15 characters same
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Fixed write_file to zero file when writing behind file end
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0.94 Fixed a little memory leak when trying to delete busy file or directory
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0.95 Fixed a bug that i_hpfs_parent_dir was not updated when moving files
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1.90 First version for 2.1.1xx kernels
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1.91 Fixed a bug that chk_sectors failed when sectors were at the end of disk
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Fixed a race-condition when write_inode is called while deleting file
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Fixed a bug that could possibly happen (with very low probability) when
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using 0xff in filenames.
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Rewritten locking to avoid race-conditions
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Mount option 'eas' now works
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Fsync no longer returns error
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Files beginning with '.' are marked hidden
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Remount support added
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Alloc is not so slow when filesystem becomes full
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Atimes are no more updated because it slows down operation
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Code cleanup (removed all commented debug prints)
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1.92 Corrected a bug when sync was called just before closing file
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1.93 Modified, so that it works with kernels >= 2.1.131, I don't know if it
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works with previous versions
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Fixed a possible problem with disks > 64G (but I don't have one, so I can't
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test it)
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Fixed a file overflow at 2G
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Added new option 'timeshift'
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Changed behaviour on HPFS386: It is now possible to operate on HPFS386 in
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read-only mode
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Fixed a bug that slowed down alloc and prevented allocating 100% space
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(this bug was not destructive)
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1.94 Added workaround for one bug in Linux
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Fixed one buffer leak
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Fixed some incompatibilities with large extended attributes (but it's still
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not 100% ok, I have no info on it and OS/2 doesn't want to create them)
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Rewritten allocation
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Fixed a bug with i_blocks (du sometimes didn't display correct values)
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Directories have no longer archive attribute set (some programs don't like
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it)
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Fixed a bug that it set badly one flag in large anode tree (it was not
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destructive)
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1.95 Fixed one buffer leak, that could happen on corrupted filesystem
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Fixed one bug in allocation in 1.94
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1.96 Added workaround for one bug in OS/2 (HPFS locked up, HPFS386 reported
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error sometimes when opening directories in PMSHELL)
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Fixed a possible bitmap race
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Fixed possible problem on large disks
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You can now delete open files
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Fixed a nondestructive race in rename
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1.97 Support for HPFS v3 (on large partitions)
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ZFixed a bug that it didn't allow creation of files > 128M
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(it should be 2G)
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1.97.1 Changed names of global symbols
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Fixed a bug when chmoding or chowning root directory
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1.98 Fixed a deadlock when using old_readdir
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Better directory handling; workaround for "unbalanced tree" bug in OS/2
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1.99 Corrected a possible problem when there's not enough space while deleting
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file
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Now it tries to truncate the file if there's not enough space when deleting
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Removed a lot of redundant code
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2.00 Fixed a bug in rename (it was there since 1.96)
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Better anti-fragmentation strategy
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2.01 Fixed problem with directory listing over NFS
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Directory lseek now checks for proper parameters
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Fixed race-condition in buffer code - it is in all filesystems in Linux;
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when reading device (cat /dev/hda) while creating files on it, files
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could be damaged
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2.02 Workaround for bug in breada in Linux. breada could cause accesses beyond
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end of partition
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2.03 Char, block devices and pipes are correctly created
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Fixed non-crashing race in unlink (Alexander Viro)
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Now it works with Japanese version of OS/2
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2.04 Fixed error when ftruncate used to extend file
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2.05 Fixed crash when got mount parameters without =
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Fixed crash when allocation of anode failed due to full disk
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Fixed some crashes when block io or inode allocation failed
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2.06 Fixed some crash on corrupted disk structures
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Better allocation strategy
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Reschedule points added so that it doesn't lock CPU long time
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It should work in read-only mode on Warp Server
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2.07 More fixes for Warp Server. Now it really works
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2.08 Creating new files is not so slow on large disks
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An attempt to sync deleted file does not generate filesystem error
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2.09 Fixed error on extremely fragmented files
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1.98 Fixed a deadlock when using old_readdir
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Better directory handling; workaround for "unbalanced tree" bug in OS/2
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1.99 Corrected a possible problem when there's not enough space while deleting
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file
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Now it tries to truncate the file if there's not enough space when
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deleting
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vim: set textwidth=80:
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Removed a lot of redundant code
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2.00 Fixed a bug in rename (it was there since 1.96)
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Better anti-fragmentation strategy
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2.01 Fixed problem with directory listing over NFS
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Directory lseek now checks for proper parameters
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Fixed race-condition in buffer code - it is in all filesystems in Linux;
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when reading device (cat /dev/hda) while creating files on it, files
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could be damaged
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2.02 Workaround for bug in breada in Linux. breada could cause accesses beyond
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end of partition
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2.03 Char, block devices and pipes are correctly created
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Fixed non-crashing race in unlink (Alexander Viro)
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Now it works with Japanese version of OS/2
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2.04 Fixed error when ftruncate used to extend file
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2.05 Fixed crash when got mount parameters without =
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Fixed crash when allocation of anode failed due to full disk
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Fixed some crashes when block io or inode allocation failed
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2.06 Fixed some crash on corrupted disk structures
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Better allocation strategy
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Reschedule points added so that it doesn't lock CPU long time
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It should work in read-only mode on Warp Server
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2.07 More fixes for Warp Server. Now it really works
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2.08 Creating new files is not so slow on large disks
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An attempt to sync deleted file does not generate filesystem error
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2.09 Fixed error on extremely fragmented files
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====== =========================================================================
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@ -69,6 +69,7 @@ Documentation for filesystem implementations.
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gfs2-uevents
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hfs
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hfsplus
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hpfs
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fuse
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overlayfs
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virtiofs
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