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2011-06-25jbd: Add fixed tracepointsLukas Czerner3-0/+19
This commit adds fixed tracepoint for jbd. It has been based on fixed tracepoints for jbd2, however there are missing those for collecting statistics, since I think that it will require more intrusive patch so I should have its own commit, if someone decide that it is needed. Also there are new tracepoints in __journal_drop_transaction() and journal_update_superblock(). The list of jbd tracepoints: jbd_checkpoint jbd_start_commit jbd_commit_locking jbd_commit_flushing jbd_commit_logging jbd_drop_transaction jbd_end_commit jbd_do_submit_data jbd_cleanup_journal_tail jbd_update_superblock_end Signed-off-by: Lukas Czerner <lczerner@redhat.com> Cc: Jan Kara <jack@suse.cz> Signed-off-by: Jan Kara <jack@suse.cz>
2011-06-25ext3: Add fixed tracepointsLukas Czerner6-16/+82
This commit adds fixed tracepoints to the ext3 code. It is based on ext4 tracepoints, however due to the differences of both file systems, there are some tracepoints missing (those for delaloc and for multi-block allocator) and there are some ext3 specific as well (for reservation windows). Here is a list: ext3_free_inode ext3_request_inode ext3_allocate_inode ext3_evict_inode ext3_drop_inode ext3_mark_inode_dirty ext3_write_begin ext3_ordered_write_end ext3_writeback_write_end ext3_journalled_write_end ext3_ordered_writepage ext3_writeback_writepage ext3_journalled_writepage ext3_readpage ext3_releasepage ext3_invalidatepage ext3_discard_blocks ext3_request_blocks ext3_allocate_blocks ext3_free_blocks ext3_sync_file_enter ext3_sync_file_exit ext3_sync_fs ext3_rsv_window_add ext3_discard_reservation ext3_alloc_new_reservation ext3_reserved ext3_forget ext3_read_block_bitmap ext3_direct_IO_enter ext3_direct_IO_exit ext3_unlink_enter ext3_unlink_exit ext3_truncate_enter ext3_truncate_exit ext3_get_blocks_enter ext3_get_blocks_exit ext3_load_inode Signed-off-by: Lukas Czerner <lczerner@redhat.com> Cc: Jan Kara <jack@suse.cz> Signed-off-by: Jan Kara <jack@suse.cz>
2011-06-24Merge branch 'for-linus' of git://git.kernel.dk/linux-blockLinus Torvalds1-1/+13
* 'for-linus' of git://git.kernel.dk/linux-block: block: add REQ_SECURE to REQ_COMMON_MASK block: use the passed in @bdev when claiming if partno is zero block: Add __attribute__((format(printf...) and fix fallout block: make disk_block_events() properly wait for work cancellation block: remove non-syncing __disk_block_events() and fold it into disk_block_events() block: don't use non-syncing event blocking in disk_check_events() cfq-iosched: fix locking around ioc->ioc_data assignment
2011-06-24Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6Linus Torvalds1-14/+25
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: cifs: fix wsize negotiation to respect max buffer size and active signing (try #4) CIFS: Fix problem with 3.0-rc1 null user mount failure
2011-06-24Remove unneeded version.h includes from fs/Jesper Juhl2-2/+0
It was pointed out by 'make versioncheck' that some includes of linux/version.h were not needed in fs/ (fs/btrfs/ctree.h and fs/omfs/file.c). This patch removes them. Signed-off-by: Jesper Juhl <jj@chaosbits.net> Acked-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-06-23cifs: fix wsize negotiation to respect max buffer size and active signing (try #4)Jeff Layton1-13/+20
Hopefully last version. Base signing check on CAP_UNIX instead of tcon->unix_ext, also clean up the comments a bit more. According to Hongwei Sun's blog posting here: http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx CAP_LARGE_WRITEX is ignored when signing is active. Also, the maximum size for a write without CAP_LARGE_WRITEX should be the maxBuf that the server sent in the NEGOTIATE request. Fix the wsize negotiation to take this into account. While we're at it, alter the other wsize definitions to use sizeof(WRITE_REQ) to allow for slightly larger amounts of data to potentially be written per request. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-06-22Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy/jfs-2.6Linus Torvalds4-12/+11
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy/jfs-2.6: jfs: agstart field must be 64 bits JFS: Don't save agno in the inode jfs: Update agstart when resizing volume jfs: old_agsize should be 64 bits in jfs_extendfs
2011-06-22CIFS: Fix problem with 3.0-rc1 null user mount failurePavel Shilovsky1-1/+5
Figured it out: it was broken by b946845a9dc523c759cae2b6a0f6827486c3221a commit - "cifs: cifs_parse_mount_options: do not tokenize mount options in-place". So, as a quick fix I suggest to apply this patch. [PATCH] CIFS: Fix kfree() with constant string in a null user case Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-06-21Merge branch 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6Linus Torvalds12-61/+127
* 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: NFS: Fix decode_secinfo_maxsz NFSv4.1: Fix an off-by-one error in pnfs_generic_pg_test NFSv4.1: Fix some issues with pnfs_generic_pg_test NFSv4.1: file layout must consider pg_bsize for coalescing pnfs-obj: No longer needed to take an extra ref at add_device SUNRPC: Ensure the RPC client only quits on fatal signals NFSv4: Fix a readdir regression nfs4.1: mark layout as bad on error path in _pnfs_return_layout nfs4.1: prevent race that allowed use of freed layout in _pnfs_return_layout NFSv4.1: need to put_layout_hdr on _pnfs_return_layout error path NFS: (d)printks should use %zd for ssize_t arguments NFSv4.1: fix break condition in pnfs_find_lseg nfs4.1: fix several problems with _pnfs_return_layout NFSv4.1: allow zero fh array in filelayout decode layout NFSv4.1: allow nfs_fhget to succeed with mounted on fileid NFSv4.1: Fix a refcounting issue in the pNFS device id cache NFSv4.1: deprecate headerpadsz in CREATE_SESSION NFS41: do not update isize if inode needs layoutcommit NLM: Don't hang forever on NLM unlock requests NFS: fix umount of pnfs filesystems
2011-06-21Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4Linus Torvalds10-160/+147
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: jbd2: Fix oops in jbd2_journal_remove_journal_head() jbd2: Remove obsolete parameters in the comments for some jbd2 functions ext4: fixed tracepoints cleanup ext4: use FIEMAP_EXTENT_LAST flag for last extent in fiemap ext4: Fix max file size and logical block counting of extent format file ext4: correct comments for ext4_free_blocks()
2011-06-21NFS: Fix decode_secinfo_maxszBryan Schumaker1-1/+1
I initially did the calculation in bytes, and not words Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-06-21NFSv4.1: Fix an off-by-one error in pnfs_generic_pg_testTrond Myklebust1-5/+16
And document what is going on there... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-06-21NFSv4.1: Fix some issues with pnfs_generic_pg_testTrond Myklebust2-5/+10
1. If the intention is to coalesce requests 'prev' and 'req' then we have to ensure at least that we have a layout starting at req_offset(prev). 2. If we're only requesting a minimal layout of length desc->pg_count, we need to test the length actually returned by the server before we allow the coalescing to occur. 3. We need to deal correctly with (pgio->lseg == NULL) 4. Fixup the test guarding the pnfs_update_layout. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-06-20Merge branch 'for-2.6.40' of git://linux-nfs.org/~bfields/linuxLinus Torvalds3-20/+19
* 'for-2.6.40' of git://linux-nfs.org/~bfields/linux: nfsd4: fix break_lease flags on nfsd open nfsd: link returns nfserr_delay when breaking lease nfsd: v4 support requires CRYPTO nfsd: fix dependency of nfsd on auth_rpcgss
2011-06-20Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6Linus Torvalds10-36/+5
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: devcgroup_inode_permission: take "is it a device node" checks to inlined wrapper fix comment in generic_permission() kill obsolete comment for follow_down() proc_sys_permission() is OK in RCU mode reiserfs_permission() doesn't need to bail out in RCU mode proc_fd_permission() is doesn't need to bail out in RCU mode nilfs2_permission() doesn't need to bail out in RCU mode logfs doesn't need ->permission() at all coda_ioctl_permission() is safe in RCU mode cifs_permission() doesn't need to bail out in RCU mode bad_inode_permission() is safe from RCU mode ubifs: dereferencing an ERR_PTR in ubifs_mount()
2011-06-20jfs: agstart field must be 64 bitsDave Kleikamp1-1/+1
The previous patch added the agstart field to jfs_ip, but declared it a long. We need to make sure its 64 bits on every platform. Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
2011-06-20NFSv4.1: file layout must consider pg_bsize for coalescingBenny Halevy2-3/+6
Otherwise we end up overflowing the rpc buffer size on the receive end. Signed-off-by: Benny Halevy <benny@tonian.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-06-20Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstableLinus Torvalds11-189/+174
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: Btrfs: avoid delayed metadata items during commits btrfs: fix uninitialized return value btrfs: fix wrong reservation when doing delayed inode operations btrfs: Remove unused sysfs code btrfs: fix dereference of ERR_PTR value Btrfs: fix relocation races Btrfs: set no_trans_join after trying to expand the transaction Btrfs: protect the pending_snapshots list with trans_lock Btrfs: fix path leakage on subvol deletion Btrfs: drop the delalloc_bytes check in shrink_delalloc Btrfs: check the return value from set_anon_super
2011-06-20JFS: Don't save agno in the inodeDave Kleikamp3-9/+9
Resizing the file system can result in an in-memory inode being remapped to a different aggregate group (AG). A cached AG number can cause problems when trying to free or allocate inodes. Instead, save the IAG's agstart address and calculate the agno when we need it. Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
2011-06-20jfs: Update agstart when resizing volumeDave Kleikamp1-2/+1
A comment indicates that the IAG's agstart does not need to be updated since it will always point to a block in the same aggregate group, but jfs_fsck isn't so forgiving and reports it as an error. I'm fixing this in jfsutils as well, so either a new kernel or new utilities will be sufficient to fix the problem. Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
2011-06-20jfs: old_agsize should be 64 bits in jfs_extendfsDave Kleikamp1-1/+1
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
2011-06-20fix comment in generic_permission()Al Viro1-1/+2
CAP_DAC_OVERRIDE is enough for MAY_EXEC on directory, even if no exec bits are set. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20kill obsolete comment for follow_down()Al Viro1-3/+0
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20proc_sys_permission() is OK in RCU modeAl Viro1-3/+0
nothing blocking there, since all instances of sysctl ->permissions() method are non-blocking - both of them, that is. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20reiserfs_permission() doesn't need to bail out in RCU modeAl Viro1-2/+0
nothing blocking other than generic_permission() (and check_acl callback does bail out in RCU mode). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20proc_fd_permission() is doesn't need to bail out in RCU modeAl Viro1-5/+1
nothing blocking except generic_permission() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20nilfs2_permission() doesn't need to bail out in RCU modeAl Viro1-6/+1
Nothing blocking except for generic_permission(). Which will DTRT. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20logfs doesn't need ->permission() at allAl Viro1-8/+0
... and never did, what with its ->permission() being what we do by default when ->permission is NULL... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20coda_ioctl_permission() is safe in RCU modeAl Viro1-2/+0
return (mask & MAY_EXEC) ? -EACCES : 0; is non-blocking... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20cifs_permission() doesn't need to bail out in RCU modeAl Viro1-3/+0
nothing potentially blocking except generic_permission(), which will DTRT Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20bad_inode_permission() is safe from RCU modeAl Viro1-3/+0
return -EIO; is *not* a blocking operation, thank you very much. Nick, what the hell have you been smoking? Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20ubifs: dereferencing an ERR_PTR in ubifs_mount()Dan Carpenter1-0/+1
d251ed271d5 "ubifs: fix sget races" left out the goto from this error path so the static checkers complain that we're dereferencing "sb" when it's an ERR_PTR. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20nfsd4: fix break_lease flags on nfsd openJ. Bruce Fields1-6/+9
Thanks to Casey Bodley for pointing out that on a read open we pass 0, instead of O_RDONLY, to break_lease, with the result that a read open is treated like a write open for the purposes of lease breaking! Reported-by: Casey Bodley <cbodley@citi.umich.edu> Cc: stable@kernel.org Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2011-06-19pnfs-obj: No longer needed to take an extra ref at add_deviceBoaz Harrosh1-1/+0
Andy's last device_cache patches, already take an extra reference on the newly inserted device_id. So we can remove it from obj-io. Without this patch the device_ids are leaked. Andy's patches are not in Linus tree yet. So I'm not sure if they are scheduled for this Kernel or the next. This patch should be added as part of these. CC: Andy Adamson <andros@netapp.com> Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-06-19Merge branches 'perf-urgent-for-linus', 'sched-urgent-for-linus', 'timers-urgent-for-linus' and 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tipLinus Torvalds1-1/+4
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: tools/perf: Fix static build of perf tool tracing: Fix regression in printk_formats file * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: generic-ipi: Fix kexec boot crash by initializing call_single_queue before enabling interrupts * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: clocksource: Make watchdog robust vs. interruption timerfd: Fix wakeup of processes when timer is cancelled on clock change * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, MAINTAINERS: Add x86 MCE people x86, efi: Do not reserve boot services regions within reserved areas
2011-06-18isofs: fix bh leak in isofs_fill_super() error caseLinus Torvalds1-1/+2
In isofs_fill_super(), when an iso_primary_descriptor is found, it is kept in pri_bh. The error cases don't properly release it. Fix it. Reported-and-tested-by: 김원석 <stanley.will.kim@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-06-17Btrfs: avoid delayed metadata items during commitsChris Mason3-10/+28
Snapshot creation has two phases. One is the initial snapshot setup, and the second is done during commit, while nobody is allowed to modify the root we are snapshotting. The delayed metadata insertion code can break that rule, it does a delayed inode update on the inode of the parent of the snapshot, and delayed directory item insertion. This makes sure to run the pending delayed operations before we record the snapshot root, which avoids corruptions. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-06-17btrfs: fix uninitialized return valueDavid Sterba1-3/+3
When allocation fails in btrfs_read_fs_root_no_name, ret is not set although it is returned, holding a garbage value. Signed-off-by: David Sterba <dsterba@suse.cz> Reviewed-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-06-17btrfs: fix wrong reservation when doing delayed inode operationsMiao Xie2-6/+20
We have migrated the space for the delayed inode items from trans_block_rsv to global_block_rsv, but we forgot to set trans->block_rsv to global_block_rsv when we doing delayed inode operations, and the following Oops happened: [ 9792.654889] ------------[ cut here ]------------ [ 9792.654898] WARNING: at fs/btrfs/extent-tree.c:5681 btrfs_alloc_free_block+0xca/0x27c [btrfs]() [ 9792.654899] Hardware name: To Be Filled By O.E.M. [ 9792.654900] Modules linked in: btrfs zlib_deflate libcrc32c ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables arc4 rt61pci rt2x00pci rt2x00lib snd_hda_codec_hdmi mac80211 snd_hda_codec_realtek cfg80211 snd_hda_intel edac_core snd_seq rfkill pcspkr serio_raw snd_hda_codec eeprom_93cx6 edac_mce_amd sp5100_tco i2c_piix4 k10temp snd_hwdep snd_seq_device snd_pcm floppy r8169 xhci_hcd mii snd_timer snd soundcore snd_page_alloc ipv6 firewire_ohci pata_acpi ata_generic firewire_core pata_via crc_itu_t radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core [last unloaded: scsi_wait_scan] [ 9792.654919] Pid: 2762, comm: rm Tainted: G W 2.6.39+ #1 [ 9792.654920] Call Trace: [ 9792.654922] [<ffffffff81053c4a>] warn_slowpath_common+0x83/0x9b [ 9792.654925] [<ffffffff81053c7c>] warn_slowpath_null+0x1a/0x1c [ 9792.654933] [<ffffffffa038e747>] btrfs_alloc_free_block+0xca/0x27c [btrfs] [ 9792.654945] [<ffffffffa03b8562>] ? map_extent_buffer+0x6e/0xa8 [btrfs] [ 9792.654953] [<ffffffffa038189b>] __btrfs_cow_block+0xfc/0x30c [btrfs] [ 9792.654963] [<ffffffffa0396aa6>] ? btrfs_buffer_uptodate+0x47/0x58 [btrfs] [ 9792.654970] [<ffffffffa0382e48>] ? read_block_for_search+0x94/0x368 [btrfs] [ 9792.654978] [<ffffffffa0381ba9>] btrfs_cow_block+0xfe/0x146 [btrfs] [ 9792.654986] [<ffffffffa03848b0>] btrfs_search_slot+0x14d/0x4b6 [btrfs] [ 9792.654997] [<ffffffffa03b8562>] ? map_extent_buffer+0x6e/0xa8 [btrfs] [ 9792.655022] [<ffffffffa03938e8>] btrfs_lookup_inode+0x2f/0x8f [btrfs] [ 9792.655025] [<ffffffff8147afac>] ? _cond_resched+0xe/0x22 [ 9792.655027] [<ffffffff8147b892>] ? mutex_lock+0x29/0x50 [ 9792.655039] [<ffffffffa03d41b1>] btrfs_update_delayed_inode+0x72/0x137 [btrfs] [ 9792.655051] [<ffffffffa03d4ea2>] btrfs_run_delayed_items+0x90/0xdb [btrfs] [ 9792.655062] [<ffffffffa039a69b>] btrfs_commit_transaction+0x228/0x654 [btrfs] [ 9792.655064] [<ffffffff8106e8da>] ? remove_wait_queue+0x3a/0x3a [ 9792.655075] [<ffffffffa03a2fa5>] btrfs_evict_inode+0x14d/0x202 [btrfs] [ 9792.655077] [<ffffffff81132bd6>] evict+0x71/0x111 [ 9792.655079] [<ffffffff81132de0>] iput+0x12a/0x132 [ 9792.655081] [<ffffffff8112aa3a>] do_unlinkat+0x106/0x155 [ 9792.655083] [<ffffffff81127b83>] ? path_put+0x1f/0x23 [ 9792.655085] [<ffffffff8109c53c>] ? audit_syscall_entry+0x145/0x171 [ 9792.655087] [<ffffffff81128410>] ? putname+0x34/0x36 [ 9792.655090] [<ffffffff8112b441>] sys_unlinkat+0x29/0x2b [ 9792.655092] [<ffffffff81482c42>] system_call_fastpath+0x16/0x1b [ 9792.655093] ---[ end trace 02b696eb02b3f768 ]--- This patch fix it by setting the reservation of the transaction handle to the correct one. Reported-by: Josef Bacik <josef@redhat.com> Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-06-17btrfs: Remove unused sysfs codeMaarten Lankhorst3-148/+0
Removes code no longer used. The sysfs file itself is kept, because the btrfs developers expressed interest in putting new entries to sysfs. Signed-off-by: Maarten Lankhorst <m.b.lankhorst@gmail.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-06-17btrfs: fix dereference of ERR_PTR valueDavid Sterba1-1/+1
smatch reports: btrfs_recover_log_trees error: 'wc.replay_dest' dereferencing possible ERR_PTR() Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-06-17Merge branch 'for-chris' of git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-work into for-linusChris Mason3-3/+14
Conflicts: fs/btrfs/transaction.c Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-06-17Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfsLinus Torvalds4-96/+42
* 'for-linus' of git://oss.sgi.com/xfs/xfs: xfs: make log devices with write back caches work xfs: fix ->mknod() return value on xfs_get_acl() failure
2011-06-17Btrfs: fix relocation racesChris Mason4-13/+105
The recent commit to get rid of our trans_mutex introduced some races with block group relocation. The problem is that relocation needs to do some record keeping about each root, and it was relying on the transaction mutex to coordinate things in subtle ways. This fix adds a mutex just for the relocation code and makes sure it doesn't have a big impact on normal operations. The race is really fixed in btrfs_record_root_in_trans, which is where we step back and wait for the relocation code to finish accounting setup. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-06-17KEYS/DNS: Fix ____call_usermodehelper() to not lose the session keyringDavid Howells1-1/+1
____call_usermodehelper() now erases any credentials set by the subprocess_inf::init() function. The problem is that commit 17f60a7da150 ("capabilites: allow the application of capability limits to usermode helpers") creates and commits new credentials with prepare_kernel_cred() after the call to the init() function. This wipes all keyrings after umh_keys_init() is called. The best way to deal with this is to put the init() call just prior to the commit_creds() call, and pass the cred pointer to init(). That means that umh_keys_init() and suchlike can modify the credentials _before_ they are published and potentially in use by the rest of the system. This prevents request_key() from working as it is prevented from passing the session keyring it set up with the authorisation token to /sbin/request-key, and so the latter can't assume the authority to instantiate the key. This causes the in-kernel DNS resolver to fail with ENOKEY unconditionally. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Eric Paris <eparis@redhat.com> Tested-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-06-16Merge git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/linux-2.6-nsfdLinus Torvalds1-3/+6
* git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/linux-2.6-nsfd: proc: Fix Oops on stat of /proc/<zombie pid>/ns/net
2011-06-16NFSv4: Fix a readdir regressionTrond Myklebust1-7/+7
Commit 7ebb9315 (NFS: use secinfo when crossing mountpoints) introduces a regression when decoding an NFSv4 readdir entry that sets the rdattr_error field. By treating the resulting value as if it is a decoding error, the current code may cause us to skip valid readdir entries. Reported-by: Andy Adamson <andros@netapp.com> Cc: stable@kernel.org [2.6.39] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-06-16Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6Linus Torvalds11-168/+167
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: AFS: Use i_generation not i_version for the vnode uniquifier AFS: Set s_id in the superblock to the volume name vfs: Fix data corruption after failed write in __block_write_begin() afs: afs_fill_page reads too much, or wrong data VFS: Fix vfsmount overput on simultaneous automount fix wrong iput on d_inode introduced by e6bc45d65d Delay struct net freeing while there's a sysfs instance refering to it afs: fix sget() races, close leak on umount ubifs: fix sget races ubifs: split allocation of ubifs_info into a separate function fix leak in proc_set_super()
2011-06-16xfs: make log devices with write back caches workChristoph Hellwig3-95/+41
There's no reason not to support cache flushing on external log devices. The only thing this really requires is flushing the data device first both in fsync and log commits. A side effect is that we also have to remove the barrier write test during mount, which has been superflous since the new FLUSH+FUA code anyway. Also use the chance to flush the RT subvolume write cache before the fsync commit, which is required for correct semantics. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2011-06-16AFS: Use i_generation not i_version for the vnode uniquifierDavid Howells3-10/+11
Store the AFS vnode uniquifier in the i_generation field, not the i_version field of the inode struct. i_version can then be given the AFS data version number. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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