| Commit message (Collapse) | Author | Age | Files | Lines |
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A user reported that although his root ext4 filesystem was mounting
fine, other filesystems would not mount, with the:
"Filesystem with huge files cannot be mounted RDWR without CONFIG_LBDAF"
error on his 32-bit box built without CONFIG_LBDAF. This is because
the test at mount time for this situation was not being re-checked
on remount, and the normal boot process makes an ro->rw transition,
so this was being missed.
Refactor to make a common helper function to test the filesystem
features against the type of mount request (RO vs. RW) so that we
stay consistent.
Addresses Red-Hat-Bugzilla: #517650
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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While reading through some of the mballoc code it seems that a couple
spots in the size normalization function could be streamlined.
The test for non-overlapping PAs can be or'd for the start & end
conditions, and the tests for adjacent PAs can be else-if'd -
it's essentially independently testing:
if (A + B <= C)
...
if (A > C)
...
These cannot both be true so it seems like the else-if might
be slightly more efficient and/or informative.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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ext4_mb_update_group_info is only called in one place, and it's
extremely simple. There's no reason to have it in a separate function
in a separate file as far as I can tell, it just obfuscates what's
really going on.
Perhaps it was intended to keep the grp->bb_* manipulation local to
mballoc.c but we're already accessing other grp-> fields in balloc.c
directly so this seems ok.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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ext4 will happily mount a > 16T filesystem on a 32-bit box, but
this is not safe; writes to the block device will wrap past 16T
and the page cache can't index past 16T (232 index * 4k pages).
Adding another test to the existing "too many sectors" test
should do the trick.
Add a comment, a relevant return value, and fix the reference
to the CONFIG_LBD(AF) option as well.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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During truncate we are sometimes forced to start a new transaction as
the amount of blocks to be journaled is both quite large and hard to
predict. So far we restarted a transaction while holding i_data_sem
and that violates lock ordering because i_data_sem ranks below a
transaction start (and it can lead to a real deadlock with
ext4_get_blocks() mapping blocks in some page while having a
transaction open).
We fix the problem by dropping the i_data_sem before restarting the
transaction and acquire it afterwards. It's slightly subtle that this
works:
1) By the time ext4_truncate() is called, all the page cache for the
truncated part of the file is dropped so get_block() should not be
called on it (we only have to invalidate extent cache after we
reacquire i_data_sem because some extent from not-truncated part could
extend also into the part we are going to truncate).
2) Writes, migrate or defrag hold i_mutex so they are stopped for all
the time of the truncate.
This bug has been found and analyzed by Theodore Tso <tytso@mit.edu>.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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lockdep annotation for a transaction start has been at the end of
jbd2_journal_start(). But a transaction is also started from
jbd2_journal_restart(). Move the lockdep annotation to start_this_handle()
which covers both cases.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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ext4_ext_show_leaf() will display the leaf extents when extent
debugging is enabled.
Printing out the unwritten bit is useful for debugging unwritten
extent, allow us to see the unwritten extents vs written extents,
after the unwritten extents are splitted or converted.
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
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When EXT_DEBUG is enabled I received the following compile warning on
PPC64:
CC [M] fs/ext4/inode.o
CC [M] fs/ext4/extents.o
fs/ext4/extents.c: In function ‘ext4_ext_rm_leaf’:
fs/ext4/extents.c:2097: warning: format ‘%lu’ expects type ‘long unsigned int’, but argument 2 has type ‘ext4_lblk_t’
fs/ext4/extents.c: In function ‘ext4_ext_get_blocks’:
fs/ext4/extents.c:2789: warning: format ‘%u’ expects type ‘unsigned int’, but argument 4 has type ‘long unsigned int’
fs/ext4/extents.c:2852: warning: format ‘%lu’ expects type ‘long unsigned int’, but argument 3 has type ‘ext4_lblk_t’
fs/ext4/extents.c:2953: warning: format ‘%lu’ expects type ‘long unsigned int’, but argument 4 has type ‘unsigned int’
CC [M] fs/ext4/migrate.o
The patch fixes compile warning.
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Index: linux-2.6.31-rc4/fs/ext4/extents.c
===================================================================
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Currently the group preallocation code tries to find a large (512)
free block from which to do per-cpu group allocation for small files.
The problem with this scheme is that it leaves the filesystem horribly
fragmented. In the worst case, if the filesystem is unmounted and
remounted (after a system shutdown, for example) we forget the fact
that wee were using a particular (now-partially filled) 512 block
extent. So the next time we try to allocate space for a small file,
we will find *another* completely free 512 block chunk to allocate
small files. Given that there are 32,768 blocks in a block group,
after 64 iterations of "mount, write one 4k file in a directory,
unmount", the block group will have 64 files, each separated by 511
blocks, and the block group will no longer have any free 512
completely free chunks of blocks for group preallocation space.
So if we try to allocate blocks for a file that has been closed, such
that we know the final size of the file, and the filesystem is not
busy, avoid using group preallocation.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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The logic around sbi->s_mb_last_group and sbi->s_mb_last_start was all
screwed up. These fields were getting unconditionally all the time,
set even when stream allocation had not taken place, and if they were
being used when the file was smaller than s_mb_stream_request, which
is when the allocation should _not_ be doing stream allocation.
Fix this by determining whether or not we stream allocation should
take place once, in ext4_mb_group_or_file(), and setting a flag which
gets used in ext4_mb_regular_allocator() and ext4_mb_use_best_found().
This simplifies the code and assures that we are consistently using
(or not using) the stream allocation logic.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Displaying the flags in base 16 makes it easier to see which flags
have been set.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Allow mballoc debugging to be enabled at run-time instead of just at
compile time.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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move_extent_par_page calls a_ops->write_begin() to increase journal
handler's reference count. However, if either mext_replace_branches()
or ext4_get_block fails, the increased reference count isn't
decreased. This will cause a later attempt to umount of the fs to hang
forever. The patch addresses the issue by calling ext4_journal_stop()
if page is not NULL (which means a_ops->write_end() isn't invoked).
Signed-off-by: Peng Tao <bergwolf@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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fix jiffie rounding in jbd commit timer setup code. Rounding down
could cause the timer to be fired before the corresponding transaction
has expired. That transaction can stay not committed forever if no
new transaction is created or expicit sync/umount happens.
Signed-off-by: Alex Zhuravlev (Tomas) <alex.zhuravlev@sun.com>
Signed-off-by: Andreas Dilger <adilger@sun.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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unsigned i_block cannot be less than 0.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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When compiling with EXT4FS_DEBUG on, gcc will complain with following warnings:
linux-2.6/fs/ext4/ialloc.c: In function ‘ext4_count_free_inodes’:
linux-2.6/fs/ext4/ialloc.c:1192: warning: format ‘%lu’ expects type
‘long unsigned int’, but argument 2 has type ‘ext4_group_t’
So add a type cast to suppress it.
Signed-off-by: Peng Tao <bergwolf@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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When MB_DEBUG is enabled, we get some compile warnings because
ext4_group_t is unsigned int. This patch fixes them.
Signed-off-by Akira Fujita <a-fujita@rs.jp.nec.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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After the patch I posted last week regarding buffer head ref leaks in
no-journal mode, I looked at all the code that uses buffer heads and
searched for more potential leaks.
The patch below fixes the issues I found; these can occur even when a
journal is present.
The change to inode.c fixes a double release if
ext4_journal_get_create_access() fails.
The changes to namei.c are more complicated. add_dirent_to_buf() will
release the input buffer head EXCEPT when it returns -ENOSPC. There are
some callers of this routine that don't always do the brelse() in the event
that -ENOSPC is returned. Unfortunately, to put this fix into ext4_add_entry()
required capturing the return value of make_indexed_dir() and
add_dirent_to_buf().
Signed-off-by: Curt Wohlgemuth <curtw@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Due to on disk corruption, it can happen that journal is too short. Fail
to load it in such case so that we don't oops somewhere later.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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We need to check to make sure a journal is present before checking the
journal flags in ext4_decode_error().
Signed-off-by: Eric Sesterhenn <eric.sesterhenn@lsexperts.de>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Signed-off-by: Manish Katiyar <mkatiyar@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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The allocation of the ext4_group_info array was moved to a new
function ext4_mb_add_group_info() in commit 5f21b0e6 so that online
resize would use a common (and correct) codepath. Unfortunately, the
call to the new ext4_mb_add_group_info() function was added without
removing the code which originally allocated the array. This caused a
memory leak each time an ext4 filesystem was mounted.
The fix is simple; remove the code that did the original allocation,
since it is no longer needed.
Reported-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
fuse: add fusectl interface to max_background
fuse: limit user-specified values of max background requests
fuse: use drop_nlink() instead of direct nlink manipulation
fuse: document protocol version negotiation
fuse: make the number of max background requests and congestion threshold tunable
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Make the max_background and congestion_threshold parameters of a FUSE
mount tunable at runtime by adding the respective knobs to its directory
within the fusectl filesystem.
Signed-off-by: Csaba Henk <csaba@gluster.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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An untrusted user could DoS the system if s/he were allowed to accumulate an
arbitrary number of pending background requests by setting the above limits
to extremely high values in INIT. This patch excludes this possibility by
imposing global upper limits on the possible values of per-mount "max
background requests" and "congestion threshold" parameters for unprivileged
FUSE filesystems.
These global limits are implemented as module parameters.
Signed-off-by: Csaba Henk <csaba@gluster.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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drop_nlink() is the API function to decrease the link count of an inode.
However, at a place the control filesystem used the decrement operator
on i_nlink directly. Fix this.
Cc: Anand Avati <avati@gluster.com>
Signed-off-by: Csaba Henk <csaba@gluster.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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tunable
The practical values for these limits depend on the design of the
filesystem server so let userspace set them at initialization time.
Signed-off-by: Csaba Henk <csaba@gluster.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm:
dlm: use kernel_sendpage
dlm: fix connection close handling
dlm: fix double-release of socket in error exit path
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Using kernel_sendpage() is cleaner and safer than following
sock->ops ourselves.
Signed-off-by: Paolo Bonzini <bonzini@gnu.org>
Signed-off-by: David Teigland <teigland@redhat.com>
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Closing a connection to a node can create problems if there are
outstanding messages for that node. The problems include dlm_send
spinning attempting to reconnect, or BUG from tcp_connect_to_sock()
attempting to use a partially closed connection.
To cleanly close a connection, we now first attempt to send any pending
messages, cancel any remaining workqueue work, and flag the connection
as closed to avoid reconnect attempts.
Signed-off-by: Lars Marowsky-Bree <lmb@suse.de>
Signed-off-by: Christine Caulfield <ccaulfie@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
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The last correction to the tcp_connect_to_sock error exit path,
commit a89d63a159b1ba5833be2bef00adf8ad8caac8be, can free an already
freed socket, due to collision with a previous (incomplete) attempt
to fix the same issue, commit 311f6fc77c51926dbdfbeab0a5d88d70f01fa3f4.
Signed-off-by: Casey Dahlin <cdahlin@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6:
ext3: Flush disk caches on fsync when needed
ext3: Add locking to ext3_do_update_inode
ext3: Fix possible deadlock between ext3_truncate() and ext3_get_blocks()
jbd: Annotate transaction start also for journal_restart()
jbd: Journal block numbers can ever be only 32-bit use unsigned int for them
ext3: Update MAINTAINERS for ext3 and JBD
JBD: round commit timer up to avoid uncommitted transaction
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In case we fsync() a file and inode is not dirty, we don't force a transaction
to disk and hence don't flush disk caches. Thus file data could be just in disk
caches and not on persistent storage. Fix the problem by flushing disk caches
if we didn't force a transaction commit.
Signed-off-by: Jan Kara <jack@suse.cz>
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I've been struggling with this off and on while I've been testing the
data=guarded work. The symptom is corrupted orphan lists and inodes
with the wrong i_size stored on disk. I was convinced the
data=guarded code was just missing a call to ext3_mark_inode_dirty, but
tracing showed the i_disksize I was sending to ext3_mark_inode_dirty
wasn't actually making it to the drive.
ext3_mark_inode_dirty can be called without locks held (atime updates
and a few others), so the data=guarded code uses locks while updating
the in-memory inode, and then calls ext3_mark_inode_dirty
without any locks held.
But, ext3_mark_inode_dirty has no internal locking to make sure that
only one CPU is updating the buffer head at a time. Generally this
works out ok because everyone that changes the inode then calls
ext3_mark_inode_dirty themselves. Even though it races, eventually
someone updates the buffer heads and things move on.
But there is still a risk of the wrong values getting in, and the
data=guarded code seems to hit the race very often.
Since everyone that changes the inode also logs it, it should be
possible to fix this with some memory barriers. I'll leave that as an
exercise to the reader and lock the buffer head instead.
It it probably a good idea to have a different patch series for lockless
bit flipping on the ext3 i_state field. ext3_do_update_inode &= clears
EXT3_STATE_NEW without any locks held.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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During truncate we are sometimes forced to start a new transaction as the
amount of blocks to be journaled is both quite large and hard to predict. So
far we restarted a transaction while holding truncate_mutex and that violates
lock ordering because truncate_mutex ranks below transaction start (and it
can lead to a real deadlock with ext3_get_blocks() allocating new blocks
from ext3_writepage()).
Luckily, the problem is easy to fix: We just drop the truncate_mutex before
restarting the transaction and acquire it afterwards. We are safe to do this as
by the time ext3_truncate() is called, all the page cache for the truncated
part of the file is dropped and so writepage() cannot come and allocate new
blocks in the part of the file we are truncating. The rest of writers is
stopped by us holding i_mutex.
Signed-off-by: Jan Kara <jack@suse.cz>
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lockdep annotation for a transaction start has been at the end of
journal_start(). But a transaction is also started from journal_restart(). Move
the lockdep annotation to start_this_handle() which covers both cases.
Signed-off-by: Jan Kara <jack@suse.cz>
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It does not make sense to store block number for journal as unsigned long
since they can be only 32-bit (because of on-disk format limitation). So
change in-memory structures and variables to use unsigned int instead.
Signed-off-by: Jan Kara <jack@suse.cz>
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Fix jiffie rounding in jbd commit timer setup code. Rounding down could cause
the timer to be fired before the corresponding transaction has expired. That
transaction can stay not committed forever if no new transaction is created or
explicit sync/umount happens.
Signed-off-by: Andreas Dilger <adilger@sun.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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* 'for-linus' of git://oss.sgi.com/xfs/xfs: (39 commits)
xfs: includecheck fix for fs/xfs/xfs_iops.c
xfs: switch to seq_file
xfs: Record new maintainer information
xfs: use correct log reservation when handling ENOSPC in xfs_create
xfs: xfs_showargs() reports group *and* project quotas enabled
xfs: un-static xfs_inobt_lookup
xfs: actually enable the swapext compat handler
xfs: simplify xfs_trans_iget
xfs: merge fsync and O_SYNC handling
xfs: speed up free inode search
xfs: rationalize xfs_inobt_lookup*
xfs: untangle xfs_dialloc
xfs: factor out debug checks from xfs_dialloc and xfs_difree
xfs: improve xfs_inobt_update prototype
xfs: improve xfs_inobt_get_rec prototype
xfs: factor out inode initialisation
fs/xfs: Correct redundant test
xfs: remove XFS_INO64_OFFSET
un-static xfs_read_agf
xfs: add more statics & drop some unused functions
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Conflicts:
fs/xfs/linux-2.6/xfs_lrw.c
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fix the following 'make includecheck' warning:
fs/xfs/linux-2.6/xfs_iops.c: xfs_acl.h is included more than once.
Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Reviewed-by: Alex Elder <aelder@sgi.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
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create_proc_read_entry() is getting deprecated.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Alex Elder <aelder@sgi.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
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We added the ENOSPC handling patch in xfs_create just after it got mered
with xfs_mkdir. Change the log reservation to the variable for either
the create or mkdir value so it does the right thing if get here for creating
a directory.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
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If you enable group or project quotas on an XFS file system, then the
mount table presented through /proc/self/mounts erroneously shows
that both options are in effect for the file system. The root of
the problem is some bad logic in the xfs_showargs() function, which
is used to format the file system type-specific options in effect
for a file system.
The problem originated in this GIT commit:
Move platform specific mount option parse out of core XFS code
Date: 11/22/07
Author: Dave Chinner
SHA1 ID: a67d7c5f5d25d0b13a4dfb182697135b014fa478
For XFS quotas, project and group quota management are mutually
exclusive--only one can be in effect at a time. There are two
parts to managing quotas: aggregating usage information; and
enforcing limits. It is possible to have a quota in effect
(aggregating usage) but not enforced.
These features are recorded on an XFS mount point using these flags:
XFS_PQUOTA_ACCT - Project quotas are aggregated
XFS_GQUOTA_ACCT - Group quotas are aggregated
XFS_OQUOTA_ENFD - Project/group quotas are enforced
The code in error is in fs/xfs/linux-2.6/xfs_super.c:
if (mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
seq_puts(m, "," MNTOPT_PRJQUOTA);
else if (mp->m_qflags & XFS_PQUOTA_ACCT)
seq_puts(m, "," MNTOPT_PQUOTANOENF);
if (mp->m_qflags & (XFS_GQUOTA_ACCT|XFS_OQUOTA_ENFD))
seq_puts(m, "," MNTOPT_GRPQUOTA);
else if (mp->m_qflags & XFS_GQUOTA_ACCT)
seq_puts(m, "," MNTOPT_GQUOTANOENF);
The problem is that XFS_OQUOTA_ENFD will be set in mp->m_qflags
if either group or project quotas are enforced, and as a result
both MNTOPT_PRJQUOTA and MNTOPT_GRPQUOTA will be shown as mount
options.
Signed-off-by: Alex Elder <aelder@sgi.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Felix Blyakher <felixb@sgi.com>
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xfs_inobt_lookup is also used in xfs_itable.c, remove the STATIC modifier
from it's declaration to fix non-debug builds.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Felix Blyakher <felixb@sgi.com>
Signed-off-by: Felix Blyakher <felixb@sgi.com>
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Fix a small typo in the compat ioctl handler that cause the swapext
compat handler to never be called.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Torsten Kaiser <just.for.lkml@googlemail.com>
Tested-by: Torsten Kaiser <just.for.lkml@googlemail.com>
Reviewed-by: Eric Sandeen <sandeen@sandeen.net>
Reviewed-by: Felix Blyakher <felixb@sgi.com>
Signed-off-by: Felix Blyakher <felixb@sgi.com>
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xfs_trans_iget is a wrapper for xfs_iget that adds the inode to the
transaction after it is read. Except when the inode already is in the
inode cache, in which case it returns the existing locked inode with
increment lock recursion counts.
Now, no one in the tree every decrements these lock recursion counts,
so any user of this gets a potential double unlock when both the original
owner of the inode and the xfs_trans_iget caller unlock it. When looking
back in a git bisect in the historic XFS tree there was only one place
that decremented these counts, xfs_trans_iput. Introduced in commit
ca25df7a840f426eb566d52667b6950b92bb84b5 by Adam Sweeney in 1993,
and removed in commit 19f899a3ab155ff6a49c0c79b06f2f61059afaf3 by
Steve Lord in 2003. And as long as it didn't slip through git bisects
cracks never actually used in that time frame.
A quick audit of the callers of xfs_trans_iget shows that no caller
really relies on this behaviour fortunately - xfs_ialloc allows this
inode from disk so it must not be there before, and all the RT allocator
routines only every add each RT bitmap inode once.
In addition to removing lots of code and reducing the size of the inode
item this patch also avoids the double inode cache lookup in each
create/mkdir/mknod transaction.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alex Elder <aelder@sgi.com>
Signed-off-by: Felix Blyakher <felixb@sgi.com>
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The guarantees for O_SYNC are exactly the same as the ones we need to
make for an fsync call (and given that Linux O_SYNC is O_DSYNC the
equivalent is fdadatasync, but we treat both the same in XFS), except
with a range data writeout. Jan Kara has started unifying these two
path for filesystems using the generic helpers, and I've started to
look at XFS.
The actual transaction commited by xfs_fsync and xfs_write_sync_logforce
has a different transaction number, but actually is exactly the same.
We'll only use the fsync transaction going forward. One major difference
is that xfs_write_sync_logforce never issues a cache flush unless we
commit a transaction causing that as a side-effect, which is an obvious
bug in the O_SYNC handling. Second all the locking and i_update_size
vs i_update_core changes from 978b7237123d007b9fa983af6e0e2fa8f97f9934
never made it to xfs_write_sync_logforce, so we add them back.
To make xfs_fsync easily usable from the O_SYNC path, the filemap_fdatawait
call is moved up to xfs_file_fsync, so that we don't wait on the whole
file after we already waited for our portion in xfs_write.
We'll also use a plain call to filemap_write_and_wait_range instead
of the previous sync_page_rang which did it in two steps including
an half-hearted inode write out that doesn't help us.
Once we're done with this also remove the now useless i_update_size
tracking.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Felix Blyakher <felixb@sgi.com>
Signed-off-by: Felix Blyakher <felixb@sgi.com>
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