linux-toradex.git/fs/gfs2, branch v3.10.41

GFS2: Increase i_writecount during gfs2_setattr_chown

2014-01-25T16:27:11+00:00

commit 62e96cf81988101fe9e086b2877307b6adda5197 upstream.

This patch calls get_write_access in function gfs2_setattr_chown,
which merely increases inode->i_writecount for the duration of the
function. That will ensure that any file closes won't delete the
inode's multi-block reservation while the function is running.
It also ensures that a multi-block reservation exists when needed
for quota change operations during the chown.

Signed-off-by: Bob Peterson 
Signed-off-by: Steven Whitehouse 
Signed-off-by: Greg Kroah-Hartman

GFS2: Fix incorrect invalidation for DIO/buffered I/O

2014-01-09T20:24:24+00:00

commit dfd11184d894cd0a92397b25cac18831a1a6a5bc upstream.

In patch 209806aba9d540dde3db0a5ce72307f85f33468f we allowed
local deferred locks to be granted against a cached exclusive
lock. That opened up a corner case which this patch now
fixes.

The solution to the problem is to check whether we have cached
pages each time we do direct I/O and if so to unmap, flush
and invalidate those pages. Since the glock state machine
normally does that for us, mostly the code will be a no-op.

Signed-off-by: Steven Whitehouse 
Signed-off-by: Greg Kroah-Hartman

GFS2: don't hold s_umount over blkdev_put

2014-01-09T20:24:24+00:00

commit dfe5b9ad83a63180f358b27d1018649a27b394a9 upstream.

This is a GFS2 version of Tejun's patch:
4f331f01b9c43bf001d3ffee578a97a1e0633eac
vfs: don't hold s_umount over close_bdev_exclusive() call

In this case its blkdev_put itself that is the issue and this
patch uses the same solution of dropping and retaking s_umount.

Reported-by: Tejun Heo 
Reported-by: Al Viro 
Signed-off-by: Steven Whitehouse 
Signed-off-by: Greg Kroah-Hartman

GFS2: Don't cache iopen glocks

2013-06-03T15:40:22+00:00

This patch makes GFS2 immediately reclaim/delete all iopen glocks
as soon as they're dequeued. This allows deleters to get an
EXclusive lock on iopen so files are deleted properly instead of
being set as unlinked.

Signed-off-by: Bob Peterson 
Signed-off-by: Steven Whitehouse

GFS2: Fall back to vmalloc if kmalloc fails for dir hash tables

2013-06-03T15:39:44+00:00

This version has one more correction: the vmalloc calls are replaced
by __vmalloc calls to preserve the GFP_NOFS flag.

When GFS2's directory management code allocates buffers for a
directory hash table, if it can't get the memory it needs, it
currently gives a bad return code. Rather than giving an error,
this patch allows it to use virtual memory rather than kernel
memory for the hash table. This should make it possible for
directories to function properly, even when kernel memory becomes
very fragmented.

Signed-off-by: Bob Peterson 
Signed-off-by: Steven Whitehouse

GFS2: Increase i_writecount during gfs2_setattr_size

2013-06-03T15:38:58+00:00

This patch calls get_write_access in a few functions. This
merely increases inode->i_writecount for the duration of the function.
That will ensure that any file closes won't delete the inode's
multi-block reservation while the function is running.

Signed-off-by: Bob Peterson 
Signed-off-by: Steven Whitehouse

GFS2: Set log descriptor type for jdata blocks

2013-06-03T15:38:39+00:00

This patch sets the log descriptor type according to whether the
journal commit is for (journaled) data or metadata. This was
recently broken when the functions to process data and metadata
log ops were combined.

Signed-off-by: Bob Peterson 
Signed-off-by: Steven Whitehouse

GFS2: Fix typo in gfs2_log_end_write loop

2013-05-24T12:48:09+00:00

There was a missing _all in this loop iterator

Signed-off-by: Steven Whitehouse

GFS2: fix DLM depends to fix build errors

2013-05-24T12:47:53+00:00

Fix build errors by correcting DLM dependencies in GFS2.
Build errors happen when CONFIG_GFS2_FS_LOCKING_DLM=y and CONFIG_DLM=m:

fs/built-in.o: In function `gfs2_lock':
file.c:(.text+0xc7abd): undefined reference to `dlm_posix_get'
file.c:(.text+0xc7ad0): undefined reference to `dlm_posix_unlock'
file.c:(.text+0xc7ad9): undefined reference to `dlm_posix_lock'
fs/built-in.o: In function `gdlm_unmount':
lock_dlm.c:(.text+0xd6e5b): undefined reference to `dlm_release_lockspace'
fs/built-in.o: In function `sync_unlock':
lock_dlm.c:(.text+0xd6e9e): undefined reference to `dlm_unlock'
fs/built-in.o: In function `sync_lock':
lock_dlm.c:(.text+0xd6fb6): undefined reference to `dlm_lock'
fs/built-in.o: In function `gdlm_put_lock':
lock_dlm.c:(.text+0xd7238): undefined reference to `dlm_unlock'
fs/built-in.o: In function `gdlm_mount':
lock_dlm.c:(.text+0xd753e): undefined reference to `dlm_new_lockspace'
lock_dlm.c:(.text+0xd79d3): undefined reference to `dlm_release_lockspace'
fs/built-in.o: In function `gdlm_lock':
lock_dlm.c:(.text+0xd8179): undefined reference to `dlm_lock'
fs/built-in.o: In function `gdlm_cancel':
lock_dlm.c:(.text+0xd6b22): undefined reference to `dlm_unlock'

Signed-off-by: Randy Dunlap 
Signed-off-by: Steven Whitehouse

GFS2: Use single-block reservations for directories

2013-05-24T12:47:32+00:00

This patch changes the multi-block allocation code, such that
directory inodes only get a single block reserved in the bitmap.
That way, the bitmaps are more tightly packed together, and there
are fewer spans of free blocks for in-use block reservations.
This means it takes less time to find a free span of blocks in the
bitmap, which speeds things up. This increases the performance of
some workloads by almost 2X. In Nate's mockup.py script (which does
(1) create dir, (2) create dir in dir, (3) create file in that dir)
the test executes in 23 steps rather than 43 steps, a 47%
performance improvement.

Signed-off-by: Bob Peterson 
Signed-off-by: Steven Whitehouse