10 Aug, 2010
1 commit
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BFS is a very simple FS and its superblocks contains only static
information and is never changed. However, the BFS code for some
misterious reasons marked its buffer head as dirty from time to
time, but nothing in that buffer was ever changed.This patch removes all the BFS superblock manipulation, simply
because it is not needed. It removes:1. The si_sbh filed from 'struct bfs_sb_info' because it is not
needed. We only need to read the SB once on mount to get the
start of data blocks and the FS size. After this, we can forget
about the SB.
2. All instances of 'mark_buffer_dirty(sbh)' for BFS SB because
it is never changed.
3. The '->sync_fs()' method because there is nothing to sync
(inodes are synched by VFS).
4. The '->write_super()' method, again, because the SB is never
changed.Tested-by: Artem Bityutskiy
Signed-off-by: Artem Bityutskiy
Signed-off-by: Al Viro
27 Jul, 2008
2 commits
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Replace the BKL-based locking scheme used in the bfs driver by a private
filesystem-wide mutex.Signed-off-by: Dmitri Vorobiev
Cc: Tigran Aivazian
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch makes the following cleanups:
o removing an unused variable from bfs_fill_super();
o removing unneeded blank spaces from pointer
definitions.Signed-off-by: Dmitri Vorobiev
Cc: Tigran Aivazian
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
30 Apr, 2008
1 commit
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__FUNCTION__ is gcc-specific, use __func__
Signed-off-by: Harvey Harrison
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
08 Feb, 2008
1 commit
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Stop the BFS filesystem from using iget() and read_inode(). Replace
bfs_read_inode() with bfs_iget(), and call that instead of iget(). bfs_iget()
then uses iget_locked() directly and returns a proper error code instead of an
inode in the event of an error.bfs_fill_super() returns any error incurred when getting the root inode
instead of EINVAL.[kamalesh@linux.vnet.ibm.com: build fix]
Signed-off-by: David Howells
Acked-by: Christoph Hellwig
Signed-off-by: Kamalesh Babulal
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
15 Nov, 2007
1 commit
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I found a few bugs in the BFS driver. Detailed description of the bugs as
well as the steps to reproduce the errors are given in the kernel bugzilla.
Please follow these links for more information:http://bugzilla.kernel.org/show_bug.cgi?id=9363
http://bugzilla.kernel.org/show_bug.cgi?id=9364
http://bugzilla.kernel.org/show_bug.cgi?id=9365
http://bugzilla.kernel.org/show_bug.cgi?id=9366This patch fixes the bugs described above. Besides, the patch introduces
coding style changes to make the BFS driver conform to the requirements
specified for Linux kernel code. Finally, I made a few cosmetic changes
such as removal of trivial debug output.Also, the patch removes the fields `si_lf_ioff' and `si_lf_sblk' of the
in-core superblock structure. These fields are initialized but never
actually used.If you are wondering why I need BFS, here is the answer: I am using this
driver in the context of Linux kernel classes I am teaching in the Moscow
State University and in the International Institute of Information
Technology in Pune, India.Signed-off-by: Dmitri Vorobiev
Cc: Tigran Aivazian
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
13 Feb, 2007
1 commit
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Many struct inode_operations in the kernel can be "const". Marking them const
moves these to the .rodata section, which avoids false sharing with potential
dirty data. In addition it'll catch accidental writes at compile time to
these shared resources.Signed-off-by: Arjan van de Ven
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
29 Jun, 2006
1 commit
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Same as with already do with the file operations: keep them in .rodata and
prevents people from doing runtime patching.Signed-off-by: Christoph Hellwig
Cc: Steven French
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
29 Mar, 2006
1 commit
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This is a conversion to make the various file_operations structs in fs/
const. Basically a regexp job, with a few manual fixupsThe goal is both to increase correctness (harder to accidentally write to
shared datastructures) and reducing the false sharing of cachelines with
things that get dirty in .data (while .rodata is nicely read only and thus
cache clean)Signed-off-by: Arjan van de Ven
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
10 Sep, 2005
1 commit
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* Makes BFS code endianness-clean.
* Fixes some signedness warnings.
* Fixes a problem in fs/bfs/inode.c:164 where inodes not synced to disk
don't get fully marked as clean. Here's how to reproduce it:# mount -o loop -t bfs /bfs.img /mnt
# df -i /mnt
Filesystem Inodes IUsed IFree IUse% Mounted on
/bfs.img 48 1 47 3% /mnt
# df -k /mnt
Filesystem 1K-blocks Used Available Use% Mounted on
/bfs.img 512 5 508 1% /mnt
# cp 60k-archive.zip /mnt/mt.zip
# df -k /mnt
Filesystem 1K-blocks Used Available Use% Mounted on
/bfs.img 512 65 447 13% /mnt
# df -i /mnt
Filesystem Inodes IUsed IFree IUse% Mounted on
/bfs.img 48 2 46 5% /mnt
# rm /mnt/mt.zip
# echo $?
0[If the unlink happens before the buffers flush, the following happens:]
# df -i /mnt
Filesystem Inodes IUsed IFree IUse% Mounted on
/bfs.img 48 2 46 5% /mnt
# df -k /mnt
Filesystem 1K-blocks Used Available Use% Mounted on
/bfs.img 512 65 447 13% /mntfs/bfs/bfs.h | 1
Signed-off-by: Andrew Stribblehill
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Apr, 2005
1 commit
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Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.Let it rip!
