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* merged 3.0.101 tagWolfgang Wiedmeyer2015-10-221-1/+1
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* hfsplus: fix overflow in sector calculations in hfsplus_submit_bioJanne Kalliomäki2012-06-221-1/+1
| | | | | | | | | | | | | | | commit a6dc8c04218eb752ff79cdc24a995cf51866caed upstream. The variable io_size was unsigned int, which caused the wrong sector number to be calculated after aligning it. This then caused mount to fail with big volumes, as backup volume header information was searched from a wrong sector. Signed-off-by: Janne Kalliomäki <janne@tuxera.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* hfsplus: Fix potential buffer overflowsGreg Kroah-Hartman2012-05-072-0/+15
| | | | | | | | | | | | | | | | | | | | | | | | | commit 6f24f892871acc47b40dd594c63606a17c714f77 upstream. Commit ec81aecb2966 ("hfs: fix a potential buffer overflow") fixed a few potential buffer overflows in the hfs filesystem. But as Timo Warns pointed out, these changes also need to be made on the hfsplus filesystem as well. Reported-by: Timo Warns <warns@pre-sense.de> Acked-by: WANG Cong <amwang@redhat.com> Cc: Alexey Khoroshilov <khoroshilov@ispras.ru> Cc: Miklos Szeredi <mszeredi@suse.cz> Cc: Sage Weil <sage@newdream.net> Cc: Eugene Teo <eteo@redhat.com> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Dave Anderson <anderson@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* hfsplus: Fix kfree of wrong pointers in hfsplus_fill_super() error pathSeth Forshee2011-10-252-4/+4
| | | | | | | | | | | | | | | | | | commit f588c960fcaa6fa8bf82930bb819c9aca4eb9347 upstream. Commit 6596528e391a ("hfsplus: ensure bio requests are not smaller than the hardware sectors") changed the pointers used for volume header allocations but failed to free the correct pointers in the error path path of hfsplus_fill_super() and hfsplus_read_wrapper. The second hunk came from a separate patch by Pavel Ivanov. Reported-by: Pavel Ivanov <paivanof@gmail.com> Signed-off-by: Seth Forshee <seth.forshee@canonical.com> Signed-off-by: Christoph Hellwig <hch@tuxera.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* hfsplus: ensure bio requests are not smaller than the hardware sectorsSeth Forshee2011-10-254-42/+101
| | | | | | | | | | | | | | | commit 6596528e391ad978a6a120142cba97a1d7324cb6 upstream. Currently all bio requests are 512 bytes, which may fail for media whose physical sector size is larger than this. Ensure these requests are not smaller than the block device logical block size. BugLink: http://bugs.launchpad.net/bugs/734883 Signed-off-by: Seth Forshee <seth.forshee@canonical.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Josh Boyer <jwboyer@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* hfsplus: Fix double iput of the same inode in hfsplus_fill_super()Alexey Khoroshilov2011-06-301-1/+1
| | | | | | | | | | | There is a misprint in resource deallocation code on error path in hfsplus_fill_super(): the sbi->alloc_file inode is iput twice, while the root inode in not iput at all. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Signed-off-by: Christoph Hellwig <hch@lst.de>
* hfsplus: add missing call to bio_put()Seth Forshee2011-06-301-2/+5
| | | | | | | | | hfsplus leaks bio objects by failing to call bio_put() on the bios it allocates. Add the missing call to fix the leak. Signed-off-by: Seth Forshee <seth.forshee@canonical.com> Cc: <stable@kernel.org> # .38.x, .39.x Signed-off-by: Christoph Hellwig <hch@lst.de>
* hfsplus: remove unnecessary dentry_unhash on rmdir, dir renameSage Weil2011-05-281-6/+2
| | | | | | | hfsplus does not have problems with references to unlinked directories. Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: push dentry_unhash on rename_dir into file systemsSage Weil2011-05-261-2/+4
| | | | | | | | | | Only a few file systems need this. Start by pushing it down into each rename method (except gfs2 and xfs) so that it can be dealt with on a per-fs basis. Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: push dentry_unhash on rmdir into file systemsSage Weil2011-05-261-0/+2
| | | | | | | | | | | | Only a few file systems need this. Start by pushing it down into each fs rmdir method (except gfs2 and xfs) so it can be dealt with on a per-fs basis. This does not change behavior for any in-tree file systems. Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds2011-03-241-2/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block: (65 commits) Documentation/iostats.txt: bit-size reference etc. cfq-iosched: removing unnecessary think time checking cfq-iosched: Don't clear queue stats when preempt. blk-throttle: Reset group slice when limits are changed blk-cgroup: Only give unaccounted_time under debug cfq-iosched: Don't set active queue in preempt block: fix non-atomic access to genhd inflight structures block: attempt to merge with existing requests on plug flush block: NULL dereference on error path in __blkdev_get() cfq-iosched: Don't update group weights when on service tree fs: assign sb->s_bdi to default_backing_dev_info if the bdi is going away block: Require subsystems to explicitly allocate bio_set integrity mempool jbd2: finish conversion from WRITE_SYNC_PLUG to WRITE_SYNC and explicit plugging jbd: finish conversion from WRITE_SYNC_PLUG to WRITE_SYNC and explicit plugging fs: make fsync_buffers_list() plug mm: make generic_writepages() use plugging blk-cgroup: Add unaccounted time to timeslice_used. block: fixup plugging stubs for !CONFIG_BLOCK block: remove obsolete comments for blkdev_issue_zeroout. blktrace: Use rq->cmd_flags directly in blk_add_trace_rq. ... Fix up conflicts in fs/{aio.c,super.c}
| * block: remove per-queue pluggingJens Axboe2011-03-101-2/+0
| | | | | | | | | | | | | | | | Code has been converted over to the new explicit on-stack plugging, and delay users have been converted to use the new API for that. So lets kill off the old plugging along with aops->sync_page(). Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* | userns: rename is_owner_or_cap to inode_owner_or_capableSerge E. Hallyn2011-03-231-1/+1
|/ | | | | | | | | | | | | And give it a kernel-doc comment. [akpm@linux-foundation.org: btrfs changed in linux-next] Signed-off-by: Serge E. Hallyn <serge.hallyn@canonical.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Daniel Lezcano <daniel.lezcano@free.fr> Acked-by: David Howells <dhowells@redhat.com> Cc: James Morris <jmorris@namei.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* hfsplus: fix up a comparism in hfsplus_file_extendChristoph Hellwig2011-02-031-2/+2
| | | | | | | | | | | | Revert an incorrect hunk from commit b2837fcf4994e699a4def002e26f274d95b387c1, "hfsplus: %L-to-%ll, macro correction, and remove unneeded braces" revert a pointless change of comparism operation argument order, which turned out to not even be equivalent. Reported-by: Joe Perches <joe@perches.com> Signed-off-by: Christoph Hellwig <hch@tuxera.com>
* hfsplus: fix two memory leaks in wrapper.cChuck Ebbert2011-02-031-2/+2
| | | | | Signed-Off-By: Chuck Ebbert <cebbert@redhat.com> Signed-off-by: Christoph Hellwig <hch@tuxera.com>
* hfsplus: do not leak buffer on errorChuck Ebbert2011-02-031-2/+2
| | | | | Signed-Off-By: Chuck Ebbert <cebbert@redhat.com> Signed-off-by: Christoph Hellwig <hch@tuxera.com>
* hfsplus: fix failed mount handlingChristoph Hellwig2011-02-031-45/+61
| | | | | | | | | | | Currently the error handling in hfsplus_fill_super is a mess, and can lead to accessing fields in the superblock that haven't been even set up yet. Fix this by making sure we do not set up sb->s_root until we have the mount fully set up, and before that do proper step by step unwinding instead of using hfsplus_put_super as a big hammer. Reported-by: Dan Williams <dcbw@redhat.com> Signed-off-by: Christoph Hellwig <hch@tuxera.com>
* switch hfsplusAl Viro2011-01-122-2/+1
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge branch 'for-next' of ↵Linus Torvalds2011-01-0717-400/+701
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/hch/hfsplus * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/hch/hfsplus: hfsplus: %L-to-%ll, macro correction, and remove unneeded braces hfsplus: spaces/indentation clean-up hfsplus: C99 comments clean-up hfsplus: over 80 character lines clean-up hfsplus: fix an artifact in ioctl flag checking hfsplus: flush disk caches in sync and fsync hfsplus: optimize fsync hfsplus: split up inode flags hfsplus: write up fsync for directories hfsplus: simplify fsync hfsplus: avoid useless work in hfsplus_sync_fs hfsplus: make sure sync writes out all metadata hfsplus: use raw bio access for partition tables hfsplus: use raw bio access for the volume headers hfsplus: always use hfsplus_sync_fs to write the volume header hfsplus: silence a few debug printks hfsplus: fix option parsing during remount Fix up conflicts due to VFS changes in fs/hfsplus/{hfsplus_fs.h,unicode.c}
| * hfsplus: %L-to-%ll, macro correction, and remove unneeded bracesAnton Salikhmetov2010-12-163-14/+14
| | | | | | | | | | | | | | | | | | | | Clean-up based on checkpatch.pl report against unnecessary braces (`{' and `}'), non-standard format option %Lu (%llu recommended) as well as one trailing statement in a macro definition which should have been on the next line. Signed-off-by: Anton Salikhmetov <alexo@tuxera.com> Signed-off-by: Christoph Hellwig <hch@tuxera.com>
| * hfsplus: spaces/indentation clean-upAnton Salikhmetov2010-12-164-14/+14
| | | | | | | | | | | | | | Fix incorrect spaces and indentation reported by checkpatch.pl. Signed-off-by: Anton Salikhmetov <alexo@tuxera.com> Signed-off-by: Christoph Hellwig <hch@tuxera.com>
| * hfsplus: C99 comments clean-upAnton Salikhmetov2010-12-163-13/+16
| | | | | | | | | | | | | | | | Match coding style restriction against C99 comments where checkpatch.pl reported errors about their usage. Signed-off-by: Anton Salikhmetov <alexo@tuxera.com> Signed-off-by: Christoph Hellwig <hch@tuxera.com>
| * hfsplus: over 80 character lines clean-upAnton Salikhmetov2010-12-1616-123/+260
| | | | | | | | | | | | | | | | Match coding style line length limitation where checkpatch.pl reported over-80-character-line warnings. Signed-off-by: Anton Salikhmetov <alexo@tuxera.com> Signed-off-by: Christoph Hellwig <hch@tuxera.com>
| * hfsplus: fix an artifact in ioctl flag checkingAnton Salikhmetov2010-12-161-1/+1
| | | | | | | | | | | | | | | | Fix a flag checking artifact in hfsplus_ioctl_getflags() routine found while doing clean-up against assignments inside `if's. Signed-off-by: Anton Salikhmetov <alexo@tuxera.com> Signed-off-by: Christoph Hellwig <hch@tuxera.com>
| * hfsplus: flush disk caches in sync and fsyncChristoph Hellwig2010-11-234-0/+21
| | | | | | | | | | | | | | | | | | | | Flush the disk cache in fsync and sync to make sure data actually is on disk on completion of these system calls. There is a nobarrier mount option to disable this behaviour. It's slightly misnamed now that barrier actually are gone, but it matches the name used by all major filesystems. Signed-off-by: Christoph Hellwig <hch@tuxera.com>
| * hfsplus: optimize fsyncChristoph Hellwig2010-11-236-32/+78
| | | | | | | | | | | | | | | | | | | | Avoid doing unessecary work in fsync. Do nothing unless the inode was marked dirty, and only write the various metadata inodes out if they contain any dirty state from this inode. This is archived by adding three new dirty bits to the hfsplus-specific inode which are set in the correct places. Signed-off-by: Christoph Hellwig <hch@tuxera.com>
| * hfsplus: split up inode flagsChristoph Hellwig2010-11-234-19/+29
| | | | | | | | | | | | | | | | | | Split the flags field in the hfsplus inode into an extent_state flag that is locked by the extent_lock, and a new flags field that uses atomic bitops. The second will grow more flags in the next patch. Signed-off-by: Christoph Hellwig <hch@tuxera.com>
| * hfsplus: write up fsync for directoriesChristoph Hellwig2010-11-233-1/+3
| | | | | | | | | | | | | | | | fsync is supposed to not just work on regular files, but also on directories. Fortunately enough hfsplus_file_fsync works just fine for directories, so we can just wire it up. Signed-off-by: Christoph Hellwig <hch@tuxera.com>
| * hfsplus: simplify fsyncChristoph Hellwig2010-11-231-21/+20
| | | | | | | | | | | | | | | | | | | | Remove lots of code we don't need from fsync, we just need to call ->write_inode on the inode if it's dirty, for which sync_inode_metadata is a lot more efficient than write_inode_now, and we need to write out the various metadata inodes, which we now do explicitly instead of by calling ->sync_fs. Signed-off-by: Christoph Hellwig <hch@tuxera.com>
| * hfsplus: avoid useless work in hfsplus_sync_fsChristoph Hellwig2010-11-231-0/+3
| | | | | | | | | | | | | | | | There is no reason to write out the metadata inodes or volume headers during a non-blocking sync, as we are almost guaranteed to dirty them again during the inode writeouts. Signed-off-by: Christoph Hellwig <hch@tuxera.com>
| * hfsplus: make sure sync writes out all metadataChristoph Hellwig2010-11-231-1/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | hfsplus stores all metadata except for the volume headers in special inodes. While these are marked hashed and periodically written out by the flusher threads, we can't rely on that for sync. For the case of a data integrity sync the VM has life-lock avoidance code that avoids writing inodes again that are redirtied during the sync, which is something that can happen easily for hfsplus. So make sure we explicitly write out the metadata inodes at the beginning of hfsplus_sync_fs. Signed-off-by: Christoph Hellwig <hch@tuxera.com>
| * hfsplus: use raw bio access for partition tablesChristoph Hellwig2010-11-232-70/+71
| | | | | | | | | | | | | | | | Switch the hfsplus partition table reding for cdroms to use our bio helpers. Again we don't rely on any caching in the buffer_heads, and this gets rid of the last buffer_head use in hfsplus. Signed-off-by: Christoph Hellwig <hch@tuxera.com>
| * hfsplus: use raw bio access for the volume headersChristoph Hellwig2010-11-233-88/+131
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The hfsplus backup volume header is located two blocks from the end of the device. In case of device sizes that are not 4k aligned this means we can't access it using buffer_heads when using the default 4k block size. Switch to using raw bios to read/write all buffer headers. We were not relying on any caching behaviour of the buffer heads anyway. Additionally always read in the backup volume header during mount to verify that we can actually read it. Signed-off-by: Christoph Hellwig <hch@tuxera.com>
| * hfsplus: always use hfsplus_sync_fs to write the volume headerChristoph Hellwig2010-11-231-6/+3
| | | | | | | | | | | | | | | | | | Remove opencoded writing of the volume header in hfsplus_fill_super and hfsplus_put_super and offload it to hfsplus_sync_fs. In the put_super case this means we only write the superblock once instead of twice. Signed-off-by: Christoph Hellwig <hch@tuxera.com>
| * hfsplus: silence a few debug printksChristoph Hellwig2010-11-234-5/+3
| | | | | | | | | | | | | | Turn a few noisy debug printks that show up during xfstests into complied out debug print statements. Signed-off-by: Christoph Hellwig <hch@tuxera.com>
| * hfsplus: fix option parsing during remountChristoph Hellwig2010-11-073-5/+30
| | | | | | | | | | | | | | | | | | | | | | | | hfsplus only actually uses the force option during remount, but it uses the full option parser with a fake superblock to do so. This means remount will fail if any nls option is set (which happens frequently with older mount tools), even if it is the same. Fix this by adding a simpler version of the parser that only parses the force option for remount. Signed-off-by: Christoph Hellwig <hch@tuxera.com>
* | fs: dcache reduce branches in lookup pathNick Piggin2011-01-072-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Reduce some branches and memory accesses in dcache lookup by adding dentry flags to indicate common d_ops are set, rather than having to check them. This saves a pointer memory access (dentry->d_op) in common path lookup situations, and saves another pointer load and branch in cases where we have d_op but not the particular operation. Patched with: git grep -E '[.>]([[:space:]])*d_op([[:space:]])*=' | xargs sed -e 's/\([^\t ]*\)->d_op = \(.*\);/d_set_d_op(\1, \2);/' -e 's/\([^\t ]*\)\.d_op = \(.*\);/d_set_d_op(\&\1, \2);/' -i Signed-off-by: Nick Piggin <npiggin@kernel.dk>
* | fs: icache RCU free inodesNick Piggin2011-01-071-1/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | RCU free the struct inode. This will allow: - Subsequent store-free path walking patch. The inode must be consulted for permissions when walking, so an RCU inode reference is a must. - sb_inode_list_lock to be moved inside i_lock because sb list walkers who want to take i_lock no longer need to take sb_inode_list_lock to walk the list in the first place. This will simplify and optimize locking. - Could remove some nested trylock loops in dcache code - Could potentially simplify things a bit in VM land. Do not need to take the page lock to follow page->mapping. The downsides of this is the performance cost of using RCU. In a simple creat/unlink microbenchmark, performance drops by about 10% due to inability to reuse cache-hot slab objects. As iterations increase and RCU freeing starts kicking over, this increases to about 20%. In cases where inode lifetimes are longer (ie. many inodes may be allocated during the average life span of a single inode), a lot of this cache reuse is not applicable, so the regression caused by this patch is smaller. The cache-hot regression could largely be avoided by using SLAB_DESTROY_BY_RCU, however this adds some complexity to list walking and store-free path walking, so I prefer to implement this at a later date, if it is shown to be a win in real situations. I haven't found a regression in any non-micro benchmark so I doubt it will be a problem. Signed-off-by: Nick Piggin <npiggin@kernel.dk>
* | fs: change d_hash for rcu-walkNick Piggin2011-01-072-2/+4
| | | | | | | | | | | | | | | | | | Change d_hash so it may be called from lock-free RCU lookups. See similar patch for d_compare for details. For in-tree filesystems, this is just a mechanical change. Signed-off-by: Nick Piggin <npiggin@kernel.dk>
* | fs: change d_compare for rcu-walkNick Piggin2011-01-072-7/+13
|/ | | | | | | | | | | | | Change d_compare so it may be called from lock-free RCU lookups. This does put significant restrictions on what may be done from the callback, however there don't seem to have been any problems with in-tree fses. If some strange use case pops up that _really_ cannot cope with the rcu-walk rules, we can just add new rcu-unaware callbacks, which would cause name lookup to drop out of rcu-walk mode. For in-tree filesystems, this is just a mechanical change. Signed-off-by: Nick Piggin <npiggin@kernel.dk>
* new helper: mount_bdev()Al Viro2010-10-291-6/+4
| | | | | | ... and switch of the obvious get_sb_bdev() users to ->mount() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge branch 'for-next' of ↵Linus Torvalds2010-10-282-2/+4
|\ | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/hch/hfsplus * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/hch/hfsplus: hfsplus: free space correcly for files unlinked while open hfsplus: fix double lock typo in ioctl
| * hfsplus: free space correcly for files unlinked while openChristoph Hellwig2010-10-271-1/+3
| | | | | | | | | | | | | | | | hfsplus_delete_inode only truncates away all block allocations if i_nlink is zero. Make sure we properly drop the unlink count even when doing the rename hack for open but unlinked files. Signed-off-by: Christoph Hellwig <hch@tuxera.com>
| * hfsplus: fix double lock typo in ioctlDan Carpenter2010-10-251-1/+1
| | | | | | | | | | | | | | This was supposed to be a mutex_unlock() instead of a mutex_lock(). Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Christoph Hellwig <hch@tuxera.com>
* | new helper: ihold()Al Viro2010-10-251-1/+1
| | | | | | | | | | | | Clones an existing reference to inode; caller must already hold one. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | list.h: new helper - hlist_add_fake()Al Viro2010-10-251-1/+1
|/ | | | | | | | | | Make node look as if it was on hlist, with hlist_del() working correctly. Usable without any locking... Convert a couple of places where we want to do that to inode->i_hash. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* hfsplus: fix getxattr return valueChristoph Hellwig2010-10-151-1/+1
| | | | | | | | We need to support -EOPNOTSUPP for attributes that are not supported to match other filesystems and allow userspace to detect if Posix ACLs are supported or not. setxattr already gets this right. Signed-off-by: Christoph Hellwig <hch@tuxera.com>
* hfsplus: remove the unused hfsplus_kmap/hfsplus_kunmap helpersChristoph Hellwig2010-10-141-8/+0
| | | | Signed-off-by: Christoph Hellwig <hch@tuxera.com>
* hfsplus: create correct initial catalog entries for device filesChristoph Hellwig2010-10-144-32/+18
| | | | | | | | | | | | | | Make sure the initial insertation of the catalog entry already contains the device number by calling init_special_inode early and setting writing out the dev field of the on-disk permission structure. The latter is facilitated by sharing the almost identical hfsplus_set_perms helpers between initial catalog entry creating and ->write_inode. Unless we crashed just after mknod this bug was harmless as the inode is marked dirty at the end of hfsplus_mknod, and hfsplus_write_inode will update the catalog entry to contain the correct value. Signed-off-by: Christoph Hellwig <hch@tuxera.com>
* hfsplus: remove superflous rootflags field in hfsplus_inode_infoChristoph Hellwig2010-10-144-17/+12
| | | | | | | The rootflags field in hfsplus_inode_info only caches the immutable and append-only flags in the VFS inode, so we can easily get rid of it. Signed-off-by: Christoph Hellwig <hch@tuxera.com>
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