| Commit message (Collapse) | Author | Age | Files | Lines |
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* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
writeback: simplify the write back thread queue
writeback: split writeback_inodes_wb
writeback: remove writeback_inodes_wbc
fs-writeback: fix kernel-doc warnings
splice: check f_mode for seekable file
splice: direct_splice_actor() should not use pos in sd
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First remove items from work_list as soon as we start working on them. This
means we don't have to track any pending or visited state and can get
rid of all the RCU magic freeing the work items - we can simply free
them once the operation has finished. Second use a real completion for
tracking synchronous requests - if the caller sets the completion pointer
we complete it, otherwise use it as a boolean indicator that we can free
the work item directly. Third unify struct wb_writeback_args and struct
bdi_work into a single data structure, wb_writeback_work. Previous we
set all parameters into a struct wb_writeback_args, copied it into
struct bdi_work, copied it again on the stack to use it there. Instead
of just allocate one structure dynamically or on the stack and use it
all the way through the stack.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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The case where we have a superblock doesn't require a loop here as we scan
over all inodes in writeback_sb_inodes. Split it out into a separate helper
to make the code simpler. This also allows to get rid of the sb member in
struct writeback_control, which was rather out of place there.
Also update the comments in writeback_sb_inodes that explain the handling
of inodes from wrong superblocks.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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This was just an odd wrapper around writeback_inodes_wb. Removing this
also allows to get rid of the bdi member of struct writeback_control
which was rather out of place there.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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Fix kernel-doc to match the function's changed args.
Warning(fs/fs-writeback.c:190): No description found for parameter 'args'
Warning(fs/fs-writeback.c:190): Excess function parameter 'sb' description in 'bdi_queue_work_onstack'
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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check f_mode for seekable file
As a seekable file is allowed without a llseek function, so the old way isn't
work any more.
Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
----
fs/splice.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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direct_splice_actor() shouldn't use sd->pos, as sd->pos is for file reading,
file->f_pos should be used instead.
Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
----
fs/splice.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
ceph: fix crush device 'out' threshold to 1.0, not 0.1
ceph: fix caps usage accounting for import (non-reserved) case
ceph: only release clean, unused caps with mds requests
ceph: fix crush CHOOSE_LEAF when type is already a leaf
ceph: fix crush recursion
ceph: fix caps debugfs entry
ceph: delay umount until all mds requests drop inode+dentry refs
ceph: handle splice_dentry/d_materialize_unique error in readdir_prepopulate
ceph: fix crush map update decoding
ceph: fix message memory leak, uninitialized variable
ceph: fix map handler error path
ceph: some endianity fixes
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Fix a typo that made any OSD weighted between 0.1 and 1.0 effectively
weighted as 1.0 (fully in).
Signed-off-by: Sage Weil <sage@newdream.net>
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We need to increase the total and used counters when allocating a new cap
in the non-reserved (cap import) case.
Signed-off-by: Sage Weil <sage@newdream.net>
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We can drop caps with an mds request. Ensure we only drop unused AND
clean caps, since the MDS doesn't support cap writeback in that context,
nor do we track it. If caps are dirty, and the MDS needs them back, we
it will revoke and we will flush in the normal fashion.
This fixes a possibly loss of metadata.
Signed-off-by: Sage Weil <sage@newdream.net>
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We may not recurse for CHOOSE_LEAF if we start with a leaf node. When
that happens, the out2 vector needs to be filled in with the result.
Signed-off-by: Sage Weil <sage@newdream.net>
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There was a longstanding problem with recursion through intervening
bucket types on complex hierarchies.
Signed-off-by: Sage Weil <sage@newdream.net>
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The ceph client structure was not set correctly.
Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
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This fixes a race between handle_reply finishing an mds request, signalling
completion, and then dropping the request structing and its dentry+inode
refs, and pre_umount function waiting for requests to finish before
letting the vfs tear down the dcache. If umount was delayed waiting for
mds requests, we could race and BUG in shrink_dcache_for_umount_subtree
because of a slow dput.
This delays umount until the msgr queue flushes, which means handle_reply
will exit and will have dropped the ceph_mds_request struct. I'm assuming
the VFS has already ensured that its calls have all completed and those
request refs have thus been dropped as well (I haven't seen that race, at
least).
Signed-off-by: Sage Weil <sage@newdream.net>
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Handle a splice_dentry failure (due to a d_materialize_unique error)
without crashing. (Also, report the error code.)
Signed-off-by: Sage Weil <sage@newdream.net>
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If the incremental osdmap has a new crush map, advance the position after
decoding so that we can parse the rest of the osdmap properly.
Signed-off-by: Sage Weil <sage@newdream.net>
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We need to properly initialize skip, as not all alloc_msg op instances
set it.
Also, BUG if someone says skip but also allocates a message.
Signed-off-by: Sage Weil <sage@newdream.net>
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Don't leak message if we receive an unexpected message type.
Signed-off-by: Sage Weil <sage@newdream.net>
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Fix some problems that came up with sparse.
Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
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* 'for-linus' of git://oss.sgi.com/xfs/xfs:
xfs: remove block number from inode lookup code
xfs: rename XFS_IGET_BULKSTAT to XFS_IGET_UNTRUSTED
xfs: validate untrusted inode numbers during lookup
xfs: always use iget in bulkstat
xfs: prevent swapext from operating on write-only files
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The block number comes from bulkstat based inode lookups to shortcut
the mapping calculations. We ar enot able to trust anything from
bulkstat, so drop the block number as well so that the correct
lookups and mappings are always done.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
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Inode numbers may come from somewhere external to the filesystem
(e.g. file handles, bulkstat information) and so are inherently
untrusted. Rename the flag we use for these lookups to make it
obvious we are doing a lookup of an untrusted inode number and need
to verify it completely before trying to read it from disk.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
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When we decode a handle or do a bulkstat lookup, we are using an
inode number we cannot trust to be valid. If we are deleting inode
chunks from disk (default noikeep mode), then we cannot trust the on
disk inode buffer for any given inode number to correctly reflect
whether the inode has been unlinked as the di_mode nor the
generation number may have been updated on disk.
This is due to the fact that when we delete an inode chunk, we do
not write the clusters back to disk when they are removed - instead
we mark them stale to avoid them being written back potentially over
the top of something that has been subsequently allocated at that
location. The result is that we can have locations of disk that look
like they contain valid inodes but in reality do not. Hence we
cannot simply convert the inode number to a block number and read
the location from disk to determine if the inode is valid or not.
As a result, and XFS_IGET_BULKSTAT lookup needs to actually look the
inode up in the inode allocation btree to determine if the inode
number is valid or not.
It should be noted even on ikeep filesystems, there is the
possibility that blocks on disk may look like valid inode clusters.
e.g. if there are filesystem images hosted on the filesystem. Hence
even for ikeep filesystems we really need to validate that the inode
number is valid before issuing the inode buffer read.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
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The non-coherent bulkstat versionsthat look directly at the inode
buffers causes various problems with performance optimizations that
make increased use of just logging inodes. This patch makes bulkstat
always use iget, which should be fast enough for normal use with the
radix-tree based inode cache introduced a while ago.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
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This patch prevents user "foo" from using the SWAPEXT ioctl to swap
a write-only file owned by user "bar" into a file owned by "foo" and
subsequently reading it. It does so by checking that the file
descriptors passed to the ioctl are also opened for reading.
Signed-off-by: Dan Rosenberg <dan.j.rosenberg@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
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Fix a lockdep-splat-causing regression introduced by commit 989a2979205d
("fasync: RCU and fine grained locking").
kill_fasync() can be called from both process and hard-irq context, so
fa_lock must be taken with IRQs disabled.
Addresses https://bugzilla.kernel.org/show_bug.cgi?id=16230
Reported-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Reported-by: Dominik Brodowski <linux@dominikbrodowski.net>
Tested-by: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Maciej Rutecki <maciej.rutecki@gmail.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: "David S. Miller" <davem@davemloft.net>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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A call to sysv_write_inode() in sysv_new_inode() to its new interface that
replaced wait flag with writeback structure. This was broken by
a9185b41a4f84971b930c519f0c63bd450c4810d ("pass writeback_control to
->write_inode").
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: <stable@kernel.org> [2.6.34.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The recent commit 1f0ce8b3dd667dca7 ("mm: Move ARCH_SLAB_MINALIGN and
ARCH_KMALLOC_MINALIGN to <linux/slab_def.h>") which moved the
ARCH_SLAB_MINALIGN default into the global header inadvertently broke FLAT
for a bunch of systems. Blackfin systems now fail on any FLAT exec with:
Unable to read code+data+bss, errno 14 When your /init is a FLAT binary,
obviously this can be annoying ;).
This stems from the alignment usage in the FLAT loader. The behavior
before was that FLAT would default to ARCH_SLAB_MINALIGN only if it was
defined, and this was only defined by arches when they wanted a larger
alignment value. Otherwise it'd default to pointer alignment. Arguably,
this is kind of hokey that the FLAT is semi-abusing defines it shouldn't.
So let's merge the two alignment requirements so the floor is never 0.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: David McCullough <davidm@snapgear.com>
Cc: Greg Ungerer <gerg@uclinux.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: David Howells <dhowells@redhat.com>
Cc: David Woodhouse <David.Woodhouse@intel.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Add support to the NOMMU /proc/pid/maps file to show which mapping is the stack
of the original thread after execve. This is largely based on the MMU code.
Subsidiary thread stacks are not indicated.
For FDPIC, we now get:
root:/> cat /proc/self/maps
02064000-02067ccc rw-p 0004d000 00:01 22 /bin/busybox
0206e000-0206f35c rw-p 00006000 00:01 295 /lib/ld-uClibc.so.0
025f0000-025f6f0c r-xs 00000000 00:01 295 /lib/ld-uClibc.so.0
02680000-026ba6b0 r-xs 00000000 00:01 297 /lib/libc.so.0
02700000-0274d384 r-xs 00000000 00:01 22 /bin/busybox
02816000-02817000 rw-p 00000000 00:00 0
02848000-0284c0d8 rw-p 00000000 00:00 0
02860000-02880000 rw-p 00000000 00:00 0 [stack]
The semi-downside here is that for FLAT, we get:
root:/> cat /proc/155/maps
029f0000-029f9000 rwxp 00000000 00:00 0 [stack]
The reason being that FLAT combines a whole lot of stuff into one map
(including the stack). But this isn't any worse than the current output
(which is nothing), so screw it.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Greg Ungerer <gerg@snapgear.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
block: Don't count_vm_events for discard bio in submit_bio.
cfq: fix recursive call in cfq_blkiocg_update_completion_stats()
cfq-iosched: Fixed boot warning with BLK_CGROUP=y and CFQ_GROUP_IOSCHED=n
cfq: Don't allow queue merges for queues that have no process references
block: fix DISCARD_BARRIER requests
cciss: set SCSI max cmd len to 16, as default is wrong
cpqarray: fix two more wrong section type
cpqarray: fix wrong __init type on pci probe function
drbd: Fixed a race between disk-attach and unexpected state changes
writeback: fix pin_sb_for_writeback
writeback: add missing requeue_io in writeback_inodes_wb
writeback: simplify and split bdi_start_writeback
writeback: simplify wakeup_flusher_threads
writeback: fix writeback_inodes_wb from writeback_inodes_sb
writeback: enforce s_umount locking in writeback_inodes_sb
writeback: queue work on stack in writeback_inodes_sb
writeback: fix writeback completion notifications
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We need to check for s_instances to make sure we don't bother working
against a filesystem that is beeing unmounted, and we need to call
put_super to make sure a superblock is freed when we race against
umount. Also no need to keep sb_lock after we got a reference on it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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In "writeback: fix writeback_inodes_wb from writeback_inodes_sb" I
accidentally removed the requeue_io if we need to skip a superblock
because we can't pin it. Add it back, otherwise we're getting spurious
lockups after multiple xfstests runs.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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bdi_start_writeback now never gets a superblock passed, so we can just remove
that case. And to further untangle the code and flatten the call stack
split it into two trivial helpers for it's two callers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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bdi_writeback_all only has one caller, so fold it to simplify the code and
flatten the call stack.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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When we call writeback_inodes_wb from writeback_inodes_sb we always have
s_umount held, which currently makes the whole operation a no-op.
But if we are called to write out inodes for a specific superblock we always
have s_umount held, so replace the incorrect logic checking for WB_SYNC_ALL
which only worked by coincidence with the proper check for an explicit
superblock argument.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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Make sure that not only sync_filesystem but all callers of writeback_inodes_sb
have the superblock protected against remount. As-is this disables all
functionality for these callers, but the next patch relies on this locking to
fix writeback_inodes_sb for sync_filesystem.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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If we want to rely on s_umount in the caller we need to wait for completion
of the I/O submission before returning to the caller. Refactor
bdi_sync_writeback into a bdi_queue_work_onstack helper and use it for this
case.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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The code dealing with bdi_work->state and completion of a bdi_work is a
major mess currently. This patch makes sure we directly use one set of
flags to deal with it, and use it consistently, which means:
- always notify about completion from the rcu callback. We only ever
wait for it from on-stack callers, so this simplification does not
even cause a theoretical slowdown currently. It also makes sure we
don't miss out on the notification if we ever add other callers to
wait for it.
- make earlier completion notification depending on the on-stack
allocation, not the sync mode. If we introduce new callers that
want to do WB_SYNC_NONE writeback from on-stack callers this will
be nessecary.
Also rename bdi_wait_on_work_clear to bdi_wait_on_work_done and inline
a few small functions into their only caller to make the code
understandable.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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list_for_each_entry_safe is not suitable to protect against concurrent
modification of the list. 6754af6 introduced a race in sb walking.
list_for_each_entry can use the trick of pinning the current entry in
the list before we drop and retake the lock because it subsequently
follows cur->next. However list_for_each_entry_safe saves n=cur->next
for following before entering the loop body, so when the lock is
dropped, n may be deleted.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: John Stultz <johnstul@us.ibm.com>
Cc: Frank Mayhar <fmayhar@google.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Implicit slab.h inclusion via percpu.h is about to go away. Make sure
gfp.h or slab.h is included as necessary.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
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* 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6:
NFSv4: Fix an embarassing typo in encode_attrs()
NFSv4: Ensure that /proc/self/mountinfo displays the minor version number
NFSv4.1: Ensure that we initialise the session when following a referral
SUNRPC: Fix a re-entrancy bug in xs_tcp_read_calldir()
nfs4 use mandatory attribute file type in nfs4_get_root
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Apparently, we have never been able to set the atime correctly from the
NFSv4 client.
Reported-by: 小倉一夫 <ka-ogura@bd6.so-net.ne.jp>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@kernel.org
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Currently, we do not display the minor version mount parameter in the
/proc mount info.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@kernel.org
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Put the code that is common to both the referral and ordinary mount cases
into a common helper routine.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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S_ISDIR(fsinfo.fattr->mode) checks the file type rather than the mode bits,
so we should be checking for the NFS_ATTR_FATTR_TYPE fattr property.
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@kernel.org
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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: update ctime when changing the file's permission by setfacl
ext2: update ctime when changing the file's permission by setfacl
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ext3 didn't update the ctime of the file when its permission was changed.
Steps to reproduce:
# touch aaa
# stat -c %Z aaa
1275289822
# setfacl -m 'u::x,g::x,o::x' aaa
# stat -c %Z aaa
1275289822 <- unchanged
But, according to the spec of the ctime, ext3 must update it.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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ext2 didn't update the ctime of the file when its permission was changed.
Steps to reproduce:
# touch aaa
# stat -c %Z aaa
1275289822
# setfacl -m 'u::x,g::x,o::x' aaa
# stat -c %Z aaa
1275289822 <- unchanged
But, according to the spec of the ctime, ext2 must update it.
Port of ext3 patch by Miao Xie <miaox@cn.fujitsu.com>.
Signed-off-by: Jan Kara <jack@suse.cz>
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