linux.git/fs/ufs/ialloc.c, branch v4.8

fs/ufs: restore s_lock mutex

2015-06-16T06:07:38+00:00

Commit 0244756edc4b98c ("ufs: sb mutex merge + mutex_destroy") generated
deadlocks in read/write mode on mkdir.

This patch partially reverts it keeping fixes by Andrew Morton and
mutex_destroy()

[AV: fixed a missing bit in ufs_remount()]

Signed-off-by: Fabian Frederick 
Reported-by: Ian Campbell 
Suggested-by: Jan Kara 
Cc: Ian Campbell 
Cc: Evgeniy Dushistov 
Cc: Alexey Khoroshilov 
Cc: Roger Pau Monne 
Cc: Ian Jackson 
Cc: Al Viro 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Al Viro

ufs: deal with nfsd/iget races

2014-09-27T01:17:52+00:00

Signed-off-by: Al Viro

ufs: sb mutex merge + mutex_destroy

2014-06-06T23:08:18+00:00

Commit 788257d6101d ("ufs: remove the BKL") replaced BKL with mutex
protection using functions lock_ufs, unlock_ufs and struct mutex 'mutex'
in sb_info.

Commit b6963327e052 ("ufs: drop lock/unlock super") removed lock/unlock
super and added struct mutex 's_lock' in sb_info.

Those 2 mutexes are generally locked/unlocked at the same time except in
allocation (balloc, ialloc).

This patch merges the 2 mutexes and propagates first commit solution.
It also adds mutex destruction before kfree during ufs_fill_super
failure and ufs_put_super.

[akpm@linux-foundation.org: avoid ifdefs, return -EROFS not -EINVAL]
Signed-off-by: Fabian Frederick 
Cc: Evgeniy Dushistov 
Cc: "Chen, Jet" 
Cc: Wu Fengguang 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fs/ufs: remove unused ufs_super_block_first pointer

2014-04-07T23:36:16+00:00

Remove occurences of unused pointers to struct ufs_super_block_first
that were acquired via ubh_get_usb_first().

Detected by Coverity: CID 139929 - CID 139936, CID 139940.

Signed-off-by: Christian Engelmayer 
Cc: Evgeniy Dushistov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ufs: drop lock/unlock super

2012-10-10T03:33:39+00:00

Removed lock/unlock super. Added a new private s_lock mutex.

Signed-off-by: Marco Stornelli 
Signed-off-by: Al Viro

fs/ufs: get rid of write_super

2012-07-22T19:58:16+00:00

This patch makes UFS stop using the VFS '->write_super()' method along with
the 's_dirt' superblock flag, because they are on their way out.

The way we implement this is that we schedule a delay job instead relying on
's_dirt' and '->write_super()'.

The whole "superblock write-out" VFS infrastructure is served by the
'sync_supers()' kernel thread, which wakes up every 5 (by default) seconds and
writes out all dirty superblocks using the '->write_super()' call-back.  But the
problem with this thread is that it wastes power by waking up the system every
5 seconds, even if there are no diry superblocks, or there are no client
file-systems which would need this (e.g., btrfs does not use
'->write_super()'). So we want to kill it completely and thus, we need to make
file-systems to stop using the '->write_super()' VFS service, and then remove
it together with the kernel thread.

Tested using fsstress from the LTP project.

Signed-off-by: Artem Bityutskiy 
Signed-off-by: Al Viro

ufs: propagate umode_t

2012-01-04T03:54:59+00:00

Signed-off-by: Al Viro

filesystems: add missing nlink wrappers

2011-11-02T11:53:43+00:00

Replace direct i_nlink updates with the respective updater function
(inc_nlink, drop_nlink, clear_nlink, inode_dec_link_count).

Signed-off-by: Miklos Szeredi

remove SWRITE* I/O types

2010-08-18T05:09:01+00:00

These flags aren't real I/O types, but tell ll_rw_block to always
lock the buffer instead of giving up on a failed trylock.

Instead add a new write_dirty_buffer helper that implements this semantic
and use it from the existing SWRITE* callers.  Note that the ll_rw_block
code had a bug where it didn't promote WRITE_SYNC_PLUG properly, which
this patch fixes.

In the ufs code clean up the helper that used to call ll_rw_block
to mirror sync_dirty_buffer, which is the function it implements for
compound buffers.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Al Viro

switch ufs to ->evict_inode()

2010-08-09T20:48:02+00:00

Signed-off-by: Al Viro