Commit graph

19326 commits

Author SHA1 Message Date
Linus Torvalds
30c0f6a049 Merge branch 'for-linus' of git://git.infradead.org/users/eparis/notify
* 'for-linus' of git://git.infradead.org/users/eparis/notify:
  fsnotify: drop two useless bools in the fnsotify main loop
  fsnotify: fix list walk order
  fanotify: Return EPERM when a process is not privileged
  fanotify: resize pid and reorder structure
  fanotify: drop duplicate pr_debug statement
  fanotify: flush outstanding perm requests on group destroy
  fsnotify: fix ignored mask handling between inode and vfsmount marks
  fanotify: add MAINTAINERS entry
  fsnotify: reset used_inode and used_vfsmount on each pass
  fanotify: do not dereference inode_mark when it is unset
2010-08-28 14:11:04 -07:00
Linus Torvalds
e933424c48 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ecryptfs/ecryptfs-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ecryptfs/ecryptfs-2.6:
  eCryptfs: Fix encrypted file name lookup regression
  ecryptfs: properly mark init functions
  fs/ecryptfs: Return -ENOMEM on memory allocation failure
2010-08-28 14:10:43 -07:00
Linus Torvalds
997396a73a Merge branch 'for-linus' of 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 get_ticket_handler() error handling
  ceph: don't BUG on ENOMEM during mds reconnect
  ceph: ceph_mdsc_build_path() returns an ERR_PTR
  ceph: Fix warnings
  ceph: ceph_get_inode() returns an ERR_PTR
  ceph: initialize fields on new dentry_infos
  ceph: maintain i_head_snapc when any caps are dirty, not just for data
  ceph: fix osd request lru adjustment when sending request
  ceph: don't improperly set dir complete when holding EXCL cap
  mm: exporting account_page_dirty
  ceph: direct requests in snapped namespace based on nonsnap parent
  ceph: queue cap snap writeback for realm children on snap update
  ceph: include dirty xattrs state in snapped caps
  ceph: fix xattr cap writeback
  ceph: fix multiple mds session shutdown
2010-08-28 14:07:20 -07:00
Linus Torvalds
2547d1d20f Merge branch 'for-2.6.36' of git://linux-nfs.org/~bfields/linux
* 'for-2.6.36' of git://linux-nfs.org/~bfields/linux:
  nfsd: fix NULL dereference in nfsd_statfs()
  nfsd4: fix downgrade/lock logic
  nfsd4: typo fix in find_any_file
  nfsd4: bad BUG() in preprocess_stateid_op
2010-08-28 14:05:55 -07:00
Eric Paris
92b4678efa fsnotify: drop two useless bools in the fnsotify main loop
The fsnotify main loop has 2 bools which indicated if we processed the
inode or vfsmount mark in that particular pass through the loop.  These
bool can we replaced with the inode_group and vfsmount_group variables
and actually make the code a little easier to understand.

Signed-off-by: Eric Paris <eparis@redhat.com>
2010-08-27 21:42:11 -04:00
Eric Paris
f72adfd540 fsnotify: fix list walk order
Marks were stored on the inode and vfsmonut mark list in order from
highest memory address to lowest memory address.  The code to walk those
lists thought they were in order from lowest to highest with
unpredictable results when trying to match up marks from each.  It was
possible that extra events would be sent to userspace when inode
marks ignoring events wouldn't get matched with the vfsmount marks.

This problem only affected fanotify when using both vfsmount and inode
marks simultaneously.

Signed-off-by: Eric Paris <eparis@redhat.com>
2010-08-27 21:41:26 -04:00
Andreas Gruenbacher
a2f13ad0ba fanotify: Return EPERM when a process is not privileged
The appropriate error code when privileged operations are denied is
EPERM, not EACCES.

Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Eric Paris <paris@paris.rdu.redhat.com>
2010-08-27 19:59:42 -04:00
Tyler Hicks
93c3fe40c2 eCryptfs: Fix encrypted file name lookup regression
Fixes a regression caused by 21edad3220

When file name encryption was enabled, ecryptfs_lookup() failed to use
the encrypted and encoded version of the upper, plaintext, file name
when performing a lookup in the lower file system. This made it
impossible to lookup existing encrypted file names and any newly created
files would have plaintext file names in the lower file system.

https://bugs.launchpad.net/ecryptfs/+bug/623087

Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
2010-08-27 10:50:53 -05:00
Jerome Marchand
7371a38201 ecryptfs: properly mark init functions
Some ecryptfs init functions are not prefixed by __init and thus not
freed after initialization. This patch saved about 1kB in ecryptfs
module.

Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
2010-08-27 10:50:52 -05:00
Julia Lawall
f137f15072 fs/ecryptfs: Return -ENOMEM on memory allocation failure
In this code, 0 is returned on memory allocation failure, even though other
failures return -ENOMEM or other similar values.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression ret;
expression x,e1,e2,e3;
@@

ret = 0
... when != ret = e1
*x = \(kmalloc\|kcalloc\|kzalloc\)(...)
... when != ret = e2
if (x == NULL) { ... when != ret = e3
  return ret;
}
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
2010-08-27 10:50:52 -05:00
Takashi Iwai
f6360efb83 nfsd: fix NULL dereference in nfsd_statfs()
The commit ebabe9a900
    pass a struct path to vfs_statfs
introduced the struct path initialization, and this seems to trigger
an Oops on my machine.

fh_dentry field may be NULL and set later in fh_verify(), thus the
initialization of path must be after fh_verify().

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-08-26 13:23:16 -04:00
J. Bruce Fields
f632265d0f Merge commit 'v2.6.36-rc1' into HEAD 2010-08-26 13:22:27 -04:00
J. Bruce Fields
7d94784293 nfsd4: fix downgrade/lock logic
If we already had a RW open for a file, and get a readonly open, we were
piggybacking on the existing RW open.  That's inconsistent with the
downgrade logic which blows away the RW open assuming you'll still have
a readonly open.

Also, make sure there is a readonly or writeonly open available for
locking, again to prevent bad behavior in downgrade cases when any RW
open may be lost.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-08-26 13:22:02 -04:00
J. Bruce Fields
18608ad49c nfsd4: typo fix in find_any_file
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-08-26 13:21:09 -04:00
J. Bruce Fields
30c0e1ef0a nfsd4: bad BUG() in preprocess_stateid_op
It's OK for this function to return without setting filp--we do it in
the special-stateid case.

And there's a legitimate case where we can hit this, since we do permit
reads on write-only stateid's.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-08-26 13:20:51 -04:00
Suresh Jayaraman
f0138a79d7 Cannot allocate memory error on mount
On 08/26/2010 01:56 AM, joe hefner wrote:
> On a recent Fedora (13), I am seeing a mount failure message that I can not explain. I have a Windows Server 2003ýa with a share set up for access only for a specific username (say userfoo). If I try to mount it from Linux,ýusing userfoo and the correct password all is well. If I try with a bad password or with some other username (userbar), it fails with "Permission denied" as expected. If I try to mount as username = administrator, and give the correct administrator password, I would also expect "Permission denied", but I see "Cannot allocate memory" instead.

> ýfs/cifs/netmisc.c: Mapping smb error code 5 to POSIX err -13
> ýfs/cifs/cifssmb.c: Send error in QPathInfo = -13
> ýCIFS VFS: cifs_read_super: get root inode failed

Looks like the commit 0b8f18e3 assumed that cifs_get_inode_info() and
friends fail only due to memory allocation error when the inode is NULL
which is not the case if CIFSSMBQPathInfo() fails and returns an error.
Fix this by propagating the actual error code back.

Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-08-26 16:53:27 +00:00
Dan Carpenter
b545787dbb ceph: fix get_ticket_handler() error handling
get_ticket_handler() returns a valid pointer or it returns
ERR_PTR(-ENOMEM) if kzalloc() fails.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-26 09:26:50 -07:00
Sage Weil
e072f8aa35 ceph: don't BUG on ENOMEM during mds reconnect
We are in a position to return an error; do that instead.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-26 09:26:37 -07:00
Dan Carpenter
f44c3890d9 ceph: ceph_mdsc_build_path() returns an ERR_PTR
ceph_mdsc_build_path() returns an ERR_PTR but this code is set up to
handle NULL returns.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-26 09:24:28 -07:00
Steve French
c89e5198b2 [CIFS] Eliminate unused variable warning
CC: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-08-26 02:11:54 +00:00
Alan Cox
ad8453ab0a ceph: Fix warnings
Just scrubbing some warnings so I can see real problem ones in the build
noise. For 32bit we need to coax gcc politely into believing we really
honestly intend to the casts. Using (u64)(unsigned long) means we cast from
a pointer to a type of the right size and then extend it. This stops the
warning spew.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-25 12:02:14 -07:00
Dan Carpenter
ac1f12ef56 ceph: ceph_get_inode() returns an ERR_PTR
ceph_get_inode() returns an ERR_PTR and it doesn't return a NULL.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-25 12:01:54 -07:00
Linus Torvalds
37822188ef Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
  Eliminate sparse warning - bad constant expression
  cifs: check for NULL session password
  missing changes during ntlmv2/ntlmssp auth and sign
  [CIFS] Fix ntlmv2 auth with ntlmssp
  cifs: correction of unicode header files
  cifs: fix NULL pointer dereference in cifs_find_smb_ses
  cifs: consolidate error handling in several functions
  cifs: clean up error handling in cifs_mknod
2010-08-25 09:57:59 -07:00
Sage Weil
36e21687e6 ceph: initialize fields on new dentry_infos
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-24 16:24:19 -07:00
Sage Weil
7d8cb26d7d ceph: maintain i_head_snapc when any caps are dirty, not just for data
We used to use i_head_snapc to keep track of which snapc the current epoch
of dirty data was dirtied under.  It is used by queue_cap_snap to set up
the cap_snap.  However, since we queue cap snaps for any dirty caps, not
just for dirty file data, we need to keep a valid i_head_snapc anytime
we have dirty|flushing caps.  This fixes a NULL pointer deref in
queue_cap_snap when writing back dirty caps without data (e.g.,
snaptest-authwb.sh).

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-24 16:24:18 -07:00
shirishpargaonkar@gmail.com
2d20ca8358 Eliminate sparse warning - bad constant expression
Eliminiate sparse warning during usage of crypto_shash_* APIs
       error: bad constant expression

Allocate memory for shash descriptors once, so that we do not kmalloc/kfree it
for every signature generation (shash descriptor for md5 hash).

From ed7538619817777decc44b5660b52268077b74f3 Mon Sep 17 00:00:00 2001
From: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Date: Tue, 24 Aug 2010 11:47:43 -0500
Subject: [PATCH] eliminate sparse warnings during crypto_shash_* APis usage

Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-08-24 18:12:52 +00:00
Christoph Hellwig
b5420f2359 xfs: do not discard page cache data on EAGAIN
If xfs_map_blocks returns EAGAIN because of lock contention we must redirty the
page and not disard the pagecache content and return an error from writepage.
We used to do this correctly, but the logic got lost during the recent
reshuffle of the writepage code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Mike Gao <ygao.linux@gmail.com>
Tested-by: Mike Gao <ygao.linux@gmail.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
2010-08-24 11:47:51 +10:00
Dave Chinner
3b93c7aaef xfs: don't do memory allocation under the CIL context lock
Formatting items requires memory allocation when using delayed
logging. Currently that memory allocation is done while holding the
CIL context lock in read mode. This means that if memory allocation
takes some time (e.g. enters reclaim), we cannot push on the CIL
until the allocation(s) required by formatting complete. This can
stall CIL pushes for some time, and once a push is stalled so are
all new transaction commits.

Fix this splitting the item formatting into two steps. The first
step which does the allocation and memcpy() into the allocated
buffer is now done outside the CIL context lock, and only the CIL
insert is done inside the CIL context lock. This avoids the stall
issue.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2010-08-24 11:45:53 +10:00
Dave Chinner
a44f13edf0 xfs: Reduce log force overhead for delayed logging
Delayed logging adds some serialisation to the log force process to
ensure that it does not deference a bad commit context structure
when determining if a CIL push is necessary or not. It does this by
grabing the CIL context lock exclusively, then dropping it before
pushing the CIL if necessary. This causes serialisation of all log
forces and pushes regardless of whether a force is necessary or not.
As a result fsync heavy workloads (like dbench) can be significantly
slower with delayed logging than without.

To avoid this penalty, copy the current sequence from the context to
the CIL structure when they are swapped. This allows us to do
unlocked checks on the current sequence without having to worry
about dereferencing context structures that may have already been
freed. Hence we can remove the CIL context locking in the forcing
code and only call into the push code if the current context matches
the sequence we need to force.

By passing the sequence into the push code, we can check the
sequence again once we have the CIL lock held exclusive and abort if
the sequence has already been pushed. This avoids a lock round-trip
and unnecessary CIL pushes when we have racing push calls.

The result is that the regression in dbench performance goes away -
this change improves dbench performance on a ramdisk from ~2100MB/s
to ~2500MB/s. This compares favourably to not using delayed logging
which retuns ~2500MB/s for the same workload.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2010-08-24 11:40:03 +10:00
Dave Chinner
1a387d3be2 xfs: dummy transactions should not dirty VFS state
When we  need to cover the log, we issue dummy transactions to ensure
the current log tail is on disk. Unfortunately we currently use the
root inode in the dummy transaction, and the act of committing the
transaction dirties the inode at the VFS level.

As a result, the VFS writeback of the dirty inode will prevent the
filesystem from idling long enough for the log covering state
machine to complete. The state machine gets stuck in a loop issuing
new dummy transactions to cover the log and never makes progress.

To avoid this problem, the dummy transactions should not cause
externally visible state changes. To ensure this occurs, make sure
that dummy transactions log an unchanging field in the superblock as
it's state is never propagated outside the filesystem. This allows
the log covering state machine to complete successfully and the
filesystem now correctly enters a fully idle state about 90s after
the last modification was made.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2010-08-24 11:46:31 +10:00
Stuart Brodsky
2fe33661fc xfs: ensure f_ffree returned by statfs() is non-negative
Because of delayed updates to sb_icount field in the super block, it
is possible to allocate over maxicount number of inodes.  This
causes the arithmetic to calculate a negative number of free inodes
in user commands like df or stat -f.

Since maxicount is a somewhat arbitrary number, a slight over
allocation is not critical but user commands should be displayed as
0 or greater and never go negative.  To do this the value in the
stats buffer f_ffree is capped to never go negative.

[ Modified to use max_t as per Christoph's comment. ]

Signed-off-by: Stu Brodsky <sbrodsky@sgi.com>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
2010-08-24 11:46:05 +10:00
Dave Chinner
efceab1d56 xfs: handle negative wbc->nr_to_write during sync writeback
During data integrity (WB_SYNC_ALL) writeback, wbc->nr_to_write will
go negative on inodes with more than 1024 dirty pages due to
implementation details of write_cache_pages(). Currently XFS will
abort page clustering in writeback once nr_to_write drops below
zero, and so for data integrity writeback we will do very
inefficient page at a time allocation and IO submission for inodes
with large numbers of dirty pages.

Fix this by only aborting the page clustering code when
wbc->nr_to_write is negative and the sync mode is WB_SYNC_NONE.

Cc: <stable@kernel.org>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2010-08-24 11:44:56 +10:00
Dave Chinner
4536f2ad8b xfs: fix untrusted inode number lookup
Commit 7124fe0a5b ("xfs: validate untrusted inode
numbers during lookup") changes the inode lookup code to do btree lookups for
untrusted inode numbers. This change made an invalid assumption about the
alignment of inodes and hence incorrectly calculated the first inode in the
cluster. As a result, some inode numbers were being incorrectly considered
invalid when they were actually valid.

The issue was not picked up by the xfstests suite because it always runs fsr
and dump (the two utilities that utilise the bulkstat interface) on cache hot
inodes and hence the lookup code in the cold cache path was not sufficiently
exercised to uncover this intermittent problem.

Fix the issue by relaxing the btree lookup criteria and then checking if the
record returned contains the inode number we are lookup for. If it we get an
incorrect record, then the inode number is invalid.

Cc: <stable@kernel.org>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2010-08-24 11:42:30 +10:00
Dave Chinner
5b3eed756c xfs: ensure we mark all inodes in a freed cluster XFS_ISTALE
Under heavy load parallel metadata loads (e.g. dbench), we can fail
to mark all the inodes in a cluster being freed as XFS_ISTALE as we
skip inodes we cannot get the XFS_ILOCK_EXCL or the flush lock on.
When this happens and the inode cluster buffer has already been
marked stale and freed, inode reclaim can try to write the inode out
as it is dirty and not marked stale. This can result in writing th
metadata to an freed extent, or in the case it has already
been overwritten trigger a magic number check failure and return an
EUCLEAN error such as:

Filesystem "ram0": inode 0x442ba1 background reclaim flush failed with 117

Fix this by ensuring that we hoover up all in memory inodes in the
cluster and mark them XFS_ISTALE when freeing the cluster.

Cc: <stable@kernel.org>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2010-08-24 11:42:41 +10:00
Dave Chinner
d17c701ce6 xfs: unlock items before allowing the CIL to commit
When we commit a transaction using delayed logging, we need to
unlock the items in the transaciton before we unlock the CIL context
and allow it to be checkpointed. If we unlock them after we release
the CIl context lock, the CIL can checkpoint and complete before
we free the log items. This breaks stale buffer item unlock and
unpin processing as there is an implicit assumption that the unlock
will occur before the unpin.

Also, some log items need to store the LSN of the transaction commit
in the item (inodes and EFIs) and so can race with other transaction
completions if we don't prevent the CIL from checkpointing before
the unlock occurs.

Cc: <stable@kernel.org>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2010-08-24 11:42:52 +10:00
Jeff Layton
24e6cf92fd cifs: check for NULL session password
It's possible for a cifsSesInfo struct to have a NULL password, so we
need to check for that prior to running strncmp on it.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-08-23 17:38:31 +00:00
Shirish Pargaonkar
3ec6bbcdb4 missing changes during ntlmv2/ntlmssp auth and sign
Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-08-23 17:38:24 +00:00
Henry C Chang
07a27e226d ceph: fix osd request lru adjustment when sending request
Fix argument order.  We want to move the item to the end of the list, not
change the position of the head.

Signed-off-by: Henry C Chang <henry_c_chang@tcloudcomputing.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-22 21:34:27 -07:00
Sage Weil
124514918b ceph: don't improperly set dir complete when holding EXCL cap
If we hold the EXCL cap, we cannot trust the dir stats from the MDS (num
files, subdirs) and must not incorrectly conclude that the directory is
empty.  If we do, we get can bad results from lookup (bad ENOENT) and
bad readdir results.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-22 21:33:32 -07:00
Tvrtko Ursulin
ff8d6e9831 fanotify: drop duplicate pr_debug statement
This reminded me... you have two pr_debugs in fanotify_should_send_event
which output redundant information. Maybe you intended it like that so
it is selectable how much log spam you want, or if not you may want to
apply this patch.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@sophos.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
2010-08-22 20:30:12 -04:00
Eric Paris
2eebf582c9 fanotify: flush outstanding perm requests on group destroy
When an fanotify listener is closing it may cause a deadlock between the
listener and the original task doing an fs operation.  If the original task
is waiting for a permissions response it will be holding the srcu lock.  The
listener cannot clean up and exit until after that srcu lock is syncronized.
Thus deadlock.  The fix introduced here is to stop accepting new permissions
events when a listener is shutting down and to grant permission for all
outstanding events.  Thus the original task will eventually release the srcu
lock and the listener can complete shutdown.

Reported-by: Andreas Gruenbacher <agruen@suse.de>
Cc: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Eric Paris <eparis@redhat.com>
2010-08-22 20:28:16 -04:00
Eric Paris
84e1ab4d87 fsnotify: fix ignored mask handling between inode and vfsmount marks
The interesting 2 list lockstep walking didn't quite work out if the inode
marks only had ignores and the vfsmount list requested events.  The code to
shortcut list traversal would not run the inode list since it didn't have real
event requests.  This code forces inode list traversal when a vfsmount mark
matches the event type.  Maybe we could add an i_fsnotify_ignored_mask field
to struct inode to get the shortcut back, but it doesn't seem worth it to grow
struct inode again.

I bet with the recent changes to lock the way we do now it would actually not
be a major perf hit to just drop i_fsnotify_mark_mask altogether.  But that is
for another day.

Signed-off-by: Eric Paris <eparis@redhat.com>
2010-08-22 20:09:41 -04:00
Eric Paris
5f3f259fa8 fsnotify: reset used_inode and used_vfsmount on each pass
The fsnotify main loop has 2 booleans which tell if a particular mark was
sent to the listeners or if it should be processed in the next pass.  The
problem is that the booleans were not reset on each traversal of the loop.
So marks could get skipped even when they were not sent to the notifiers.

Reported-by: Tvrtko Ursulin <tvrtko.ursulin@sophos.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
2010-08-22 20:09:41 -04:00
Eric Paris
faa9560ae7 fanotify: do not dereference inode_mark when it is unset
The fanotify code is supposed to get the group from the mark.  It accidentally
only used the inode_mark.  If the vfsmount_mark was set but not the inode_mark
it would deref the NULL inode_mark.  Get the group from the correct place.

Reported-by: Tvrtko Ursulin <tvrtko.ursulin@sophos.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
2010-08-22 20:09:41 -04:00
Michael Rubin
679ceace84 mm: exporting account_page_dirty
This allows code outside of the mm core to safely manipulate page state
and not worry about the other accounting. Not using these routines means
that some code will lose track of the accounting and we get bugs. This
has happened once already.

Signed-off-by: Michael Rubin <mrubin@google.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-22 15:16:51 -07:00
Sage Weil
eb6bb1c5bd ceph: direct requests in snapped namespace based on nonsnap parent
When making a request in the virtual snapdir or a snapped portion of the
namespace, we should choose the MDS based on the first nonsnap parent (and
its caps).  If that is not the best place, we will get forward hints to
find the right MDS in the cluster.  This fixes ESTALE errors when using
the .snap directory and namespace with multiple MDSs.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-22 15:16:48 -07:00
Sage Weil
ed32604448 ceph: queue cap snap writeback for realm children on snap update
When a realm is updated, we need to queue writeback on inodes in that
realm _and_ its children.  Otherwise, if the inode gets cowed on the
server, we can get a hang later due to out-of-sync cap/snap state.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-22 15:16:47 -07:00
Sage Weil
4a625be472 ceph: include dirty xattrs state in snapped caps
When we snapshot dirty metadata that needs to be written back to the MDS,
include dirty xattr metadata.  Make the capsnap reference the encoded
xattr blob so that it will be written back in the FLUSHSNAP op.

Also fix the capsnap creation guard to include dirty auth or file bits,
not just tests specific to dirty file data or file writes in progress
(this fixes auth metadata writeback).

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-22 15:16:46 -07:00
Sage Weil
082afec92d ceph: fix xattr cap writeback
We should include the xattr metadata blob in the cap update message any
time we are flushing dirty state, NOT just when we are also dropping the
cap.  This fixes async xattr writeback.

Also, clean up the code slightly to avoid duplicating the bit test.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-22 15:16:41 -07:00
Sage Weil
f3c60c5918 ceph: fix multiple mds session shutdown
The use of a completion when waiting for session shutdown during umount is
inappropriate, given the complexity of the condition.  For multiple MDS's,
this resulted in the umount thread spinning, often preventing the session
close message from being processed in some cases.

Switch to a waitqueue and defined a condition helper.  This cleans things
up nicely.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-22 15:04:43 -07:00