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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/fs/affs/Changes
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
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-(Note: I consider version numbers as cheap. That means
-that I do not like numbers like 0.1 and the like for
-things that can be used since quite some time. But
-then, 3.1 doesn't mean 'perfectly stable', too.)
-
-Known bugs:
------------
-
-- Doesn't work on the alpha. The only 64/32-bit
- problem that I'm aware of (pointer/int conversion
- in readdir()) gives compiler warnings but is
- apparently not causing the failure, as directory
- reads basically work (but all files are of size 0).
- Alas, I've got no alpha to debug. :-(
-
-- The partition checker (drivers/block/genhd.c)
- doesn't work with devices which have 256 byte
- blocks (some very old SCSI drives).
-
-- The feature to automatically make the fs clean
- might leave a trashed file system with the
- bitmap flag set valid.
-
-- When a file is truncated to a size that is not
- a multiple of the blocksize, the rest of the
- last allocated block is not cleared. Well,
- this fs never claimed to be Posix conformant.
-
-Please direct bug reports to: zippel@linux-m68k.org
-
-Version 3.20
-------------
-- kill kernel lock
-- fix for a possible bitmap corruption
-
-Version 3.19
-------------
-
-- sizeof changes from Kernel Janitor Project
-- several bug fixes found with fsx
-
-Version 3.18
-------------
-
-- change to global min macro + warning fixes
-- add module tags
-
-Version 3.17
-------------
-
-- locking fixes
-- wrong sign in __affs_hash_dentry
-- remove unnecessary check in affs_new_inode
-- enable international mode for dircache fs
-
-Version 3.16
-------------
-
-- use mark_buffer_dirty_inode instead of mark_buffer_dirty.
-- introduce affs_lock_{link|dir|ext}.
-
-Version 3.15
-------------
-
-- disable link to directories until we can properly support them.
-- locking fixes for link creation/removal.
-
-Version 3.14
-------------
-
-- correctly cut off long file names for compares
-- correctly initialize s_last_bmap
-
-Version 3.13
-------------
-
-Major cleanup for 2.4 [Roman Zippel]
-- new extended block handling
-- new bitmap allocation functions
-- locking should be safe for the future
-- cleanup of some interfaces
-
-Version 3.12
-------------
-
-more 2.4 fixes: [Roman Zippel]
-- s_lock changes
-- increased getblock mess
-- clear meta blocks
-
-Version 3.11
-------------
-
-- Converted to use 2.3.x page cache [Dave Jones <dave@powertweak.com>]
-- Corruption in truncate() bugfix [Ken Tyler <kent@werple.net.au>]
-
-Version 3.10
-------------
-
-- Changed partition checker to allow devices
- with physical blocks != 512 bytes.
-
-- The partition checker now also ignores the
- word at 0xd0 that Windows likes to write to.
-
-Version 3.9
------------
-
-- Moved cleanup from release_file() to put_inode().
- This makes the first one obsolete.
-
-- truncate() zeroes the unused remainder of a
- partially used last block when a file is truncated.
- It also marks the inode dirty now (which is not
- really necessary as notify_change() will do
- it anyway).
-
-- Added a few comments, fixed some typos (and
- introduced some new ones), made the debug messages
- more consistent. Changed a bad example in the
- doc file (affs.txt).
-
-- Sets the NOEXEC flag in read_super() for old file
- systems, since you can't run programs on them.
-
-Version 3.8
------------
-Bill Hawes kindly reviewed the affs and sent me the
-patches he did. They're marked (BH). Thanks, Bill!
-
-- Cleanup of error handling in read_super().
- Didn't release all resources in case of an
- error. (BH)
-
-- put_inode() releases the ext cache only if it's
- no longer needed. (BH)
-
-- One set of dentry callbacks is enough. (BH)
-
-- Cleanup of error handling in namei.c. (BH)
-
-- Cleanup of error handling in file.c. (BH)
-
-- The original blocksize of the device is
- restored when the fs is unmounted. (BH)
-
-- getblock() did not invalidate the key cache
- when it allocated a new block.
-
-- Removed some unnecessary locks as Bill
- suggested.
-
-- Simplified match_name(), changed all hashing
- and case insensitive name comparisons to use
- uppercase. This makes the tolower() routines
- obsolete.
-
-- Added mount option 'mufs' to force muFS
- uid/gid interpretation.
-
-- File mode changes were not updated on disk.
- This was fixed before, but somehow got lost.
-
-Version 3.7
------------
-
-- Added dentry callbacks to allow the dcache to
- operate case insensitive and length ignorant
- like the affs itself.
-
-- getblock() didn't update the lastblock field in the
- inode if the fs was not an OFS. This bug only shows
- up if a file was enlarged via truncate() and there
- was not enough space.
-
-- Remove some more superfluous code left over from
- the old link days ...
-
-- Fixed some oversights which were in patch 2.1.78.
-
-- Fixed a few typos.
-
-Version 3.6
------------
-
-- dentry changes. (Thanks to Jes Sorensen for his help.)
-
-- Fixed bug in balloc(): Superblock was not set dirty after
- the bitmap was changed, so the bitmap wasn't sync'd.
-
-- Fixed nasty bug in find_new_zone(): If the current
- zone number was zero, the loop didn't terminate,
- causing a solid lock-up.
-
-- Removed support for old-style directory reads.
-
-- Fixed bug in add_entry(): When doing a sorted insert,
- the pointer to the next entry in the hash chain wasn't
- correctly byte-swapped. Since most of the users of the
- affs use it on a 68k, they didn't notice. But why did
- I not find this during my tests?
-
-- Fixed some oversights (version wasn't updated on some
- directory changes).
-
-- Handling of hard links rewritten. To the VFS
- they appear now as normal Unix links. They are
- now resolved only once in lookup(). The backside
- is that unlink(), rename() and rmdir() have to
- be smart about them, but the result is worth the
- effort. This also led to some code cleanup.
-
-- Changed name type to unsigned char; the test for
- invalid filenames didn't work correctly.
- (Thanks to Michael Krause for pointing at this.)
-
-- Changed mapping of executable flag.
-
-- Changed all network byte-order macros to the
- recommended ones.
-
-- Added a remount function, so attempts to remount
- a dircache filesystem or one with errors read/write
- can be trapped. Previously, ro remounts didn't
- flush the super block, and rw remounts didn't
- create allocation zones ...
-
-- Call shrink_dcache_parent() in rmdir().
- (Thanks to Bill Hawes.)
-
-- Permission checks in unlink().
-
-- Allow mounting of volumes with superfluous
- bitmap pointers read only, also allows them
- to be remounted read/write.
-
-- Owner/Group defaults now to the fs user (i.e.
- the one that mounted it) instead of root. This
- obsoletes the mount options uid and gid.
-
-- Argument to volume option could overflow the
- name buffer. It is now silently truncated to
- 30 characters. (Damn it! This kind of bug
- is too embarrassing.)
-
-- Split inode.c into 2 files, the superblock
- routines desperately wanted their own file.
-
-- truncate() didn't allocate an extension block
- cache. If a file was extended by means of
- truncate(), this led to an Oops.
-
-- fsuser is now checked last.
-
-- rename() will not ignore changes in filename
- casing any more (though mv(1) still won't allow
- you to do "mv oldname OldName").
-
-Version 3.5
------------
-
-- Extension block caches are now allocated on
- demand instead of when a file is opened, as
- files can be read and written without opening
- them (e. g. the loopback device does this).
-
-- Removed an unused function.
-
-Version 3.4
------------
-
-- Hash chains are now sorted by block numbers.
- (Thanks to Kars de Jong for finding this.)
-- Removed all unnecessary external symbols.
-
-Version 3.3
------------
-
-- Tried to make all types 'correct' and consistent.
-- Errors and warnings are now reported via a
- function. They are all prefixed by a severity
- and have the same appearance:
- "AFFS: <function>: <error message>"
- (There's one exception to this, as in that function
- is no pointer to the super block available.)
-- The filesystem is remounted read-only after an
- error.
-- The names of newly created filesystem objects are
- now checked for validity.
-- Minor cleanups in comments.
-- Added this Changes file. At last!
-
-Version 3.2
------------
-
-- Extension block cache: Reading/writing of huge files
- (several MB) is much faster (of course the added
- overhead slows down opening, but this is hardly
- noticeable).
-- The same get_block()-routine can now be used for
- both OFS and FFS.
-- The super block is now searched in the block that
- was calculated and in the one following. This
- should remedy the round-off error introduced by
- the 1-k blocks that Linux uses.
-- Minor changes to adhere to the new VFS interface.
-- The number of used blocks is now also calculated
- if the filesystem is mounted read-only.
-- Prefixed some constants with AFFS_ to avoid name
- clashes.
-- Removed 'EXPERIMENTAL' status.
-
-Version 3.1
------------
-
-- Fixed a nasty bug which didn't allow read-only
- mounts.
-- Allow dir-cache filesystems to be mounted
- read only.
-- OFS support.
-- Several other changes I just cannot remember
- any more.
-
-Version 3.0
------------
-
-- Almost complete rewrite for the new VFS
- interface in Linux 1.3.
-- Write support.
-- Support for hard and symbolic links.
-- Lots of things I remember even less ...
-
-Version 2.0
------------
-
-- Fixed a few things to get it compiled.
-- Automatic root block calculation.
-- Partition checker for genhd.c
-
-========================================
-
-Let's just call Ray Burr's original affs
-'Version 1.0'.