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2011-04-05Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-2.6-block * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-2.6-block: ide: always ensure that blk_delay_queue() is called if we have pending IO block: fix request sorting at unplug dm: improve block integrity support fs: export empty_aops ide: ide_requeue_and_plug() reinstate "always plug" behaviour blk-throttle: don't call xchg on bool ufs: remove unessecary blk_flush_plug block: make the flush insertion use the tail of the dispatch list block: get rid of elv_insert() interface block: dump request state on seeing a corrupted request completion
2011-04-05inotify: fix double free/corruption of stuct userEric Paris
On an error path in inotify_init1 a normal user can trigger a double free of struct user. This is a regression introduced by a2ae4cc9a16e ("inotify: stop kernel memory leak on file creation failure"). We fix this by making sure that if a group exists the user reference is dropped when the group is cleaned up. We should not explictly drop the reference on error and also drop the reference when the group is cleaned up. The new lifetime rules are that an inotify group lives from inotify_new_group to the last fsnotify_put_group. Since the struct user and inotify_devs are directly tied to this lifetime they are only changed/updated in those two locations. We get rid of all special casing of struct user or user->inotify_devs. Signed-off-by: Eric Paris <eparis@redhat.com> Cc: stable@kernel.org (2.6.37 and up) Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-04-05fs: export empty_aopsJens Axboe
With the ->sync_page() hook gone, we have a few users that add their own static address_space_operations without any functions defined. fs/inode.c already has an empty_aops that it uses for init purposes. Lets export that and use it in the places where an otherwise empty aops was defined. Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2011-04-05ufs: remove unessecary blk_flush_plugChristoph Hellwig
We already flush the per-process plugging list when context switching, so a blk_flush_plug call just before a yield() is not needed. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2011-04-05Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: Btrfs: don't warn in btrfs_add_orphan Btrfs: fix free space cache when there are pinned extents and clusters V2 Btrfs: Fix uninitialized root flags for subvolumes btrfs: clear __GFP_FS flag in the space cache inode Btrfs: fix memory leak in start_transaction() Btrfs: fix memory leak in btrfs_ioctl_start_sync() Btrfs: fix subvol_sem leak in btrfs_rename() Btrfs: Fix oops for defrag with compression turned on Btrfs: fix /proc/mounts info. Btrfs: fix compiler warning in file.c
2011-04-05Btrfs: don't warn in btrfs_add_orphanJosef Bacik
When I moved the orphan adding to btrfs_truncate I missed the fact that during orphan cleanup we just add the orphan items to the orphan list without going through btrfs_orphan_add, which results in lots of warnings on mount if you have any orphan items that need to be truncated. Just remove this warning since it's ok, this will allow all of the normal space accounting take place. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-04-05Btrfs: fix free space cache when there are pinned extents and clusters V2Josef Bacik
I noticed a huge problem with the free space cache that was presenting as an early ENOSPC. Turns out when writing the free space cache out I forgot to take into account pinned extents and more importantly clusters. This would result in us leaking free space everytime we unmounted the filesystem and remounted it. I fix this by making sure to check and see if the current block group has a cluster and writing out any entries that are in the cluster to the cache, as well as writing any pinned extents we currently have to the cache since those will be available for us to use the next time the fs mounts. This patch also adds a check to the end of load_free_space_cache to make sure we got the right amount of free space cache, and if not make sure to clear the cache and re-cache the old fashioned way. Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-04-05Btrfs: Fix uninitialized root flags for subvolumesLi Zefan
root_item->flags and root_item->byte_limit are not initialized when a subvolume is created. This bug is not revealed until we added readonly snapshot support - now you mount a btrfs filesystem and you may find the subvolumes in it are readonly. To work around this problem, we steal a bit from root_item->inode_item->flags, and use it to indicate if those fields have been properly initialized. When we read a tree root from disk, we check if the bit is set, and if not we'll set the flag and initialize the two fields of the root item. Reported-by: Andreas Philipp <philipp.andreas@gmail.com> Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Tested-by: Andreas Philipp <philipp.andreas@gmail.com> cc: stable@kernel.org Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-04-05btrfs: clear __GFP_FS flag in the space cache inodeMiao Xie
the object id of the space cache inode's key is allocated from the relative root, just like the regular file. So we can't identify space cache inode by checking the object id of the inode's key, and we have to clear __GFP_FS flag at the time we look up the space cache inode. Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-04-05Btrfs: fix memory leak in start_transaction()Yoshinori Sano
Free btrfs_trans_handle when join_transaction() fails in start_transaction() Signed-off-by: Yoshinori Sano <yoshinori.sano@gmail.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-04-05Btrfs: fix memory leak in btrfs_ioctl_start_sync()Tsutomu Itoh
Call btrfs_end_transaction() if btrfs_commit_transaction_async() fails. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-04-05Btrfs: fix subvol_sem leak in btrfs_rename()Johann Lombardi
btrfs_rename() does not release the subvol_sem if the transaction failed to start. Signed-off-by: Johann Lombardi <johann@whamcloud.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-04-05Btrfs: Fix oops for defrag with compression turned onLi Zefan
When we defrag a file, whose size can be fit into an inline extent, with compression enabled, the compress type is set to be fs_info->compress_type, which is 0 if the btrfs filesystem is mounted without compress option. This leads to oops. Reported-by: Daniel Blueman <daniel.blueman@gmail.com> Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-04-05Btrfs: fix /proc/mounts info.Tsutomu Itoh
Some mount options are not displayed by /proc/mounts. This patch displays the option such as compress_type by /proc/mounts. Ex. [before] $ mount | grep sdc2 /dev/sdc2 on /test12 type btrfs (rw,space_cache,compress=lzo) $ cat /proc/mounts | grep sdc2 /dev/sdc2 /test12 btrfs rw,relatime,compress 0 0 [after] $ mount | grep sdc2 /dev/sdc2 on /test12 type btrfs (rw,space_cache,compress=lzo) $ cat /proc/mounts | grep sdc2 /dev/sdc2 /test12 btrfs rw,relatime,compress=lzo,space_cache 0 0 Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-04-05Btrfs: fix compiler warning in file.cTsutomu Itoh
While compiling Btrfs, I got following messages: CC [M] fs/btrfs/file.o fs/btrfs/file.c: In function '__btrfs_buffered_write': fs/btrfs/file.c:909: warning: 'ret' may be used uninitialized in this function CC [M] fs/btrfs/tree-defrag.o This patch fixes compiler warning. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-03-30Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2: nilfs2: fix whitespace coding style issues nilfs2: fix oops due to a bad aops initialization nilfs2: fix data loss in mmap page write for hole blocks
2011-03-30Merge git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-clientLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: libceph: Create a new key type "ceph". libceph: Get secret from the kernel keys api when mounting with key=NAME. ceph: Move secret key parsing earlier. libceph: fix null dereference when unregistering linger requests ceph: unlock on error in ceph_osdc_start_request() ceph: fix possible NULL pointer dereference ceph: flush msgr_wq during mds_client shutdown
2011-03-30nilfs2: fix whitespace coding style issuesNicolas Kaiser
Fixes whitespace coding style issues. Signed-off-by: Nicolas Kaiser <nikai@nikai.net> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2011-03-30nilfs2: fix oops due to a bad aops initializationRyusuke Konishi
Nilfs in 2.6.39-rc1 hit the following oops: BUG: unable to handle kernel NULL pointer dereference at 0000000000000048 IP: [<ffffffff810ac235>] try_to_release_page+0x2a/0x3d PGD 234cb6067 PUD 234c72067 PMD 0 Oops: 0000 [#1] SMP <snip> Process truncate (pid: 10995, threadinfo ffff8802353c2000, task ffff880234cfa000) Stack: ffff8802333c77b8 ffffffff810b64b0 0000000000003802 ffffffffa0052cca 0000000000000000 ffff8802353c3b58 0000000000000000 ffff8802353c3b58 0000000000000001 0000000000000000 ffffea0007b92308 ffffea0007b92308 Call Trace: [<ffffffff810b64b0>] ? invalidate_inode_pages2_range+0x15f/0x273 [<ffffffffa0052cca>] ? nilfs_palloc_get_block+0x2d/0xaf [nilfs2] [<ffffffff810589e7>] ? bit_waitqueue+0x14/0xa1 [<ffffffff81058ab1>] ? wake_up_bit+0x10/0x20 [<ffffffffa00433fd>] ? nilfs_forget_buffer+0x66/0x7a [nilfs2] [<ffffffffa00467b8>] ? nilfs_btree_concat_left+0x5c/0x77 [nilfs2] [<ffffffffa00471fc>] ? nilfs_btree_delete+0x395/0x3cf [nilfs2] [<ffffffffa00449a3>] ? nilfs_bmap_do_delete+0x6e/0x79 [nilfs2] [<ffffffffa0045845>] ? nilfs_btree_last_key+0x14b/0x15e [nilfs2] [<ffffffffa00449dd>] ? nilfs_bmap_truncate+0x2f/0x83 [nilfs2] [<ffffffffa0044ab2>] ? nilfs_bmap_last_key+0x35/0x62 [nilfs2] [<ffffffffa003e99b>] ? nilfs_truncate_bmap+0x6b/0xc7 [nilfs2] [<ffffffffa003ee4a>] ? nilfs_truncate+0x79/0xe4 [nilfs2] [<ffffffff810b6c00>] ? vmtruncate+0x33/0x3b [<ffffffffa003e8f1>] ? nilfs_setattr+0x4d/0x8c [nilfs2] [<ffffffff81026106>] ? do_page_fault+0x31b/0x356 [<ffffffff810f9d61>] ? notify_change+0x17d/0x262 [<ffffffff810e5046>] ? do_truncate+0x65/0x80 [<ffffffff810e52af>] ? sys_ftruncate+0xf1/0xf6 [<ffffffff8132c012>] ? system_call_fastpath+0x16/0x1b Code: c3 48 83 ec 08 48 8b 17 48 8b 47 18 80 e2 01 75 04 0f 0b eb fe 48 8b 17 80 e6 20 74 05 31 c0 41 59 c3 48 85 c0 74 11 48 8b 40 58 8b 40 48 48 85 c0 74 04 41 58 ff e0 59 e9 b1 b5 05 00 41 54 RIP [<ffffffff810ac235>] try_to_release_page+0x2a/0x3d RSP <ffff8802353c3b08> CR2: 0000000000000048 This oops was brought in by the change "block: remove per-queue plugging" (commit: 7eaceaccab5f40bb). It initializes mapping->a_ops with a NULL pointer for some pages in nilfs (e.g. btree node pages), but mm code doesn't NULL pointer checks against mapping->a_ops. (the check is done for each callback function) This corrects the aops initialization and fixes the oops. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Acked-by: Jens Axboe <jaxboe@fusionio.com>
2011-03-30nilfs2: fix data loss in mmap page write for hole blocksRyusuke Konishi
From the result of a function test of mmap, mmap write to shared pages turned out to be broken for hole blocks. It doesn't write out filled blocks and the data will be lost after umount. This is due to a bug that the target file is not queued for log writer when filling hole blocks. Also, nilfs_page_mkwrite function exits normal code path even after successfully filled hole blocks due to a change of block_page_mkwrite function; just after nilfs was merged into the mainline, block_page_mkwrite() started to return VM_FAULT_LOCKED instead of zero by the patch "mm: close page_mkwrite races" (commit: b827e496c893de0c). The current nilfs_page_mkwrite() is not handling this value properly. This corrects nilfs_page_mkwrite() and will resolve the data loss problem in mmap write. [This should be applied to every kernel since 2.6.30 but a fix is needed for 2.6.37 and prior kernels] Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Tested-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: stable <stable@kernel.org> [2.6.38]
2011-03-29ceph: Move secret key parsing earlier.Tommi Virtanen
This makes the base64 logic be contained in mount option parsing, and prepares us for replacing the homebew key management with the kernel key retention service. Signed-off-by: Tommi Virtanen <tommi.virtanen@dreamhost.com> Signed-off-by: Sage Weil <sage@newdream.net>
2011-03-29fs: don't use igrab() while holding i_lockDave Chinner
Fix the incorrect use of igrab() inside the i_lock in NFS and Ceph‥ If we are already holding the i_lock, we have a reference to the inode so we can safely use ihold() to gain an extra reference. This avoids hangs due to lock recursion on the i_lock now that the inode_lock is gone and igrab() uses the i_lock itself. Signed-off-by: Dave Chinner <dchinner@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: linux-fsdevel@vger.kernel.org Cc: Ryan Mallon <ryan@bluewatersys.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-28Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfsLinus Torvalds
* 'for-linus' of git://oss.sgi.com/xfs/xfs: xfs: stop using the page cache to back the buffer cache xfs: register the inode cache shrinker before quotachecks xfs: xfs_trans_read_buf() should return an error on failure xfs: introduce inode cluster buffer trylocks for xfs_iflush vmap: flush vmap aliases when mapping fails xfs: preallocation transactions do not need to be synchronous Fix up trivial conflicts in fs/xfs/linux-2.6/xfs_buf.c due to plug removal.
2011-03-28Merge branch 'for-linus' of ↵Linus Torvalds
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: write lock requested keys eCryptfs: move ecryptfs_find_auth_tok_for_sig() call before mutex_lock eCryptfs: verify authentication tokens before their use eCryptfs: modified size of keysig in the ecryptfs_key_sig structure eCryptfs: removed num_global_auth_toks from ecryptfs_mount_crypt_stat eCryptfs: ecryptfs_keyring_auth_tok_for_sig() bug fix eCryptfs: Unlock page in write_begin error path ecryptfs: modify write path to encrypt page in writepage eCryptfs: Remove ECRYPTFS_NEW_FILE crypt stat flag eCryptfs: Remove unnecessary grow_file() function
2011-03-28Merge branch 'for-linus-unmerged' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable * 'for-linus-unmerged' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: (45 commits) Btrfs: fix __btrfs_map_block on 32 bit machines btrfs: fix possible deadlock by clearing __GFP_FS flag btrfs: check link counter overflow in link(2) btrfs: don't mess with i_nlink of unlocked inode in rename() Btrfs: check return value of btrfs_alloc_path() Btrfs: fix OOPS of empty filesystem after balance Btrfs: fix memory leak of empty filesystem after balance Btrfs: fix return value of setflags ioctl Btrfs: fix uncheck memory allocations btrfs: make inode ref log recovery faster Btrfs: add btrfs_trim_fs() to handle FITRIM Btrfs: adjust btrfs_discard_extent() return errors and trimmed bytes Btrfs: make btrfs_map_block() return entire free extent for each device of RAID0/1/10/DUP Btrfs: make update_reserved_bytes() public btrfs: return EXDEV when linking from different subvolumes Btrfs: Per file/directory controls for COW and compression Btrfs: add datacow flag in inode flag btrfs: use GFP_NOFS instead of GFP_KERNEL Btrfs: check return value of read_tree_block() btrfs: properly access unaligned checksum buffer ... Fix up trivial conflicts in fs/btrfs/volumes.c due to plug removal in the block layer.
2011-03-28Merge branch 'upstream-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2 * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2: (39 commits) Treat writes as new when holes span across page boundaries fs,ocfs2: Move o2net_get_func_run_time under CONFIG_OCFS2_FS_STATS. ocfs2/dlm: Move kmalloc() outside the spinlock ocfs2: Make the left masklogs compat. ocfs2: Remove masklog ML_AIO. ocfs2: Remove masklog ML_UPTODATE. ocfs2: Remove masklog ML_BH_IO. ocfs2: Remove masklog ML_JOURNAL. ocfs2: Remove masklog ML_EXPORT. ocfs2: Remove masklog ML_DCACHE. ocfs2: Remove masklog ML_NAMEI. ocfs2: Remove mlog(0) from fs/ocfs2/dir.c ocfs2: remove NAMEI from symlink.c ocfs2: Remove masklog ML_QUOTA. ocfs2: Remove mlog(0) from quota_local.c. ocfs2: Remove masklog ML_RESERVATIONS. ocfs2: Remove masklog ML_XATTR. ocfs2: Remove masklog ML_SUPER. ocfs2: Remove mlog(0) from fs/ocfs2/heartbeat.c ocfs2: Remove mlog(0) from fs/ocfs2/slot_map.c ... Fix up trivial conflict in fs/ocfs2/super.c
2011-03-28Treat writes as new when holes span across page boundariesGoldwyn Rodrigues
When a hole spans across page boundaries, the next write forces a read of the block. This could end up reading existing garbage data from the disk in ocfs2_map_page_blocks. This leads to non-zero holes. In order to avoid this, mark the writes as new when the holes span across page boundaries. Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.de> Signed-off-by: jlbec <jlbec@evilplan.org>
2011-03-28Merge branch 'mlog_replace_for_39' of git://repo.or.cz/taoma-kernel into ↵Joel Becker
ocfs2-merge-window-fix
2011-03-28fs,ocfs2: Move o2net_get_func_run_time under CONFIG_OCFS2_FS_STATS.Rakib Mullick
When CONFIG_DEBUG_FS=y and CONFIG_OCFS2_FS_STATS=n, we get the following warning: fs/ocfs2/cluster/tcp.c:213:16: warning: ‘o2net_get_func_run_time’ defined but not used Since o2net_get_func_run_time is only called from o2net_update_recv_stats, so move it under CONFIG_OCFS2_FS_STATS. Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com> Signed-off-by: jlbec <jlbec@evilplan.org>
2011-03-28Merge branch 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6Linus Torvalds
* 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: NFS: Ensure that rpc_release_resources_task() can be called twice. NFS: Don't leak RPC clients in NFSv4 secinfo negotiation NFS: Fix a hang in the writeback path
2011-03-28Btrfs: fix __btrfs_map_block on 32 bit machinesChris Mason
Recent changes for discard support didn't compile, this fixes them not to try and % 64 bit numbers. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-03-28btrfs: fix possible deadlock by clearing __GFP_FS flagMiao Xie
Using the GFP_HIGHUSER_MOVABLE flag to allocate the metadata's page may cause deadlock. Task1 open() ... btrfs_search_slot() ... btrfs_cow_block() ... alloc_page() wait for reclaiming shrink_slab() ... shrink_icache_memory() ... btrfs_evict_inode() ... btrfs_search_slot() If the path is locked by task1, the deadlock happens. So the btree's page cache is different with the file's page cache, it can not allocate pages by GFP_HIGHUSER_MOVABLE flag, we must clear __GFP_FS flag in GFP_HIGHUSER_MOVABLE flag. Reported-by: Itaru Kitayama <kitayama@cl.bb4u.ne.jp> Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-03-28btrfs: check link counter overflow in link(2)Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-03-28btrfs: don't mess with i_nlink of unlocked inode in rename()Al Viro
old_inode is not locked; it's not safe to play with its link count. Instead of bumping it and calling btrfs_unlink_inode(), add a variant of the latter that does not do btrfs_drop_nlink()/ btrfs_update_inode(), call it instead of btrfs_inc_nlink()/ btrfs_unlink_inode() and do btrfs_update_inode() ourselves. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-03-28Btrfs: check return value of btrfs_alloc_path()Tsutomu Itoh
Adding the check on the return value of btrfs_alloc_path() to several places. And, some of callers are modified by this change. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-03-28Btrfs: fix OOPS of empty filesystem after balanceliubo
btrfs will remove unused block groups after balance. When a empty filesystem is balanced, the block group with tag "DATA" may be dropped, and after umount and mount again, it will not find "DATA" space_info and lead to OOPS. So we initial the necessary space_infos(DATA, SYSTEM, METADATA) to avoid OOPS. Reported-by: Daniel J Blueman <daniel.blueman@gmail.com> Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-03-28Btrfs: fix memory leak of empty filesystem after balanceliubo
After Josef's patch(commit 3c14874acc71180553fb5aba528e3cf57c5b958b), btrfs will exclude super bytes when reading block groups(by marking a extent state UPTODATE). However, these bytes do not get freed while balance remove unused block groups, and we won't process those removed ones any more, when we do umount and unload the btrfs module, btrfs hits a memory leak. This patch add the missing free operation. Reproduce steps: $ mkfs.btrfs disk $ mount disk /mnt/btrfs -o loop $ btrfs filesystem balance /mnt/btrfs $ umount /mnt/btrfs $ rmmod btrfs Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-03-28Btrfs: fix return value of setflags ioctlliubo
setflags ioctl should return error when any checks fail. Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com> Reviewed-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-03-28Btrfs: fix uncheck memory allocationsYoshinori Sano
To make Btrfs code more robust, several return value checks where memory allocation can fail are introduced. I use BUG_ON where I don't know how to handle the error properly, which increases the number of using the notorious BUG_ON, though. Signed-off-by: Yoshinori Sano <yoshinori.sano@gmail.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-03-28btrfs: make inode ref log recovery fasterliubo
When we recover from crash via write-ahead log tree and process the inode refs, for each btrfs_inode_ref item, we will 1) check if we already have a perfect match in fs/file tree, if we have, then we're done. 2) search the corresponding back reference in fs/file tree, and check all the names in this back reference to see if they are also in the log to avoid conflict corners. 3) recover the logged inode refs to fs/file tree. In current btrfs, however, - for 2)'s check, once is enough, since the checked back reference will remain unchanged after processing all the inode refs belonged to the key. - it has no need to do another 1) between 2) and 3). I've made a small test to show how it improves, $dd if=/dev/zero of=foobar bs=4K count=1 $sync $make 100 hard links continuously, like ln foobar link_i $fsync foobar $echo b > /proc/sysrq-trigger after reboot $time mount DEV PATH without patch: real 0m0.285s user 0m0.001s sys 0m0.009s with patch: real 0m0.123s user 0m0.000s sys 0m0.010s Changelog v1->v2: - fix double free - pointed by David Sterba Changelog v2->v3: - adjust free order Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-03-28Btrfs: add btrfs_trim_fs() to handle FITRIMLi Dongyang
We take an free extent out from allocator, trim it, then put it back, but before we trim the block group, we should make sure the block group is cached, so plus a little change to make cache_block_group() run without a transaction. Signed-off-by: Li Dongyang <lidongyang@novell.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-03-28Btrfs: adjust btrfs_discard_extent() return errors and trimmed bytesLi Dongyang
Callers of btrfs_discard_extent() should check if we are mounted with -o discard, as we want to make fitrim to work even the fs is not mounted with -o discard. Also we should use REQ_DISCARD to map the free extent to get a full mapping, last we only return errors if 1. the error is not a EOPNOTSUPP 2. no device supports discard Signed-off-by: Li Dongyang <lidongyang@novell.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-03-28Btrfs: make btrfs_map_block() return entire free extent for each device of ↵Li Dongyang
RAID0/1/10/DUP btrfs_map_block() will only return a single stripe length, but we want the full extent be mapped to each disk when we are trimming the extent, so we add length to btrfs_bio_stripe and fill it if we are mapping for REQ_DISCARD. Signed-off-by: Li Dongyang <lidongyang@novell.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-03-28Btrfs: make update_reserved_bytes() publicLi Dongyang
Make the function public as we should update the reserved extents calculations after taking out an extent for trimming. Signed-off-by: Li Dongyang <lidongyang@novell.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-03-28btrfs: return EXDEV when linking from different subvolumesMark Fasheh
btrfs_link returns EPERM if a cross-subvolume link is attempted. However, in this case I believe EXDEV to be the more appropriate value. >From the link(2) man page: EXDEV oldpath and newpath are not on the same mounted file system. (Linux permits a file system to be mounted at multiple points, but link() does not work across different mount points, even if the same file system is mounted on both.) This matters because an application may have different behaviors based on return codes. Signed-off-by: Mark Fasheh <mfasheh@suse.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-03-28Btrfs: Per file/directory controls for COW and compressionLiu Bo
Data compression and data cow are controlled across the entire FS by mount options right now. ioctls are needed to set this on a per file or per directory basis. This has been proposed previously, but VFS developers wanted us to use generic ioctls rather than btrfs-specific ones. According to Chris's comment, there should be just one true compression method(probably LZO) stored in the super. However, before this, we would wait for that one method is stable enough to be adopted into the super. So I list it as a long term goal, and just store it in ram today. After applying this patch, we can use the generic "FS_IOC_SETFLAGS" ioctl to control file and directory's datacow and compression attribute. NOTE: - The compression type is selected by such rules: If we mount btrfs with compress options, ie, zlib/lzo, the type is it. Otherwise, we'll use the default compress type (zlib today). v1->v2: - rebase to the latest btrfs. v2->v3: - fix a problem, i.e. when a file is set NOCOW via mount option, then this NOCOW will be screwed by inheritance from parent directory. Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-03-28btrfs: use GFP_NOFS instead of GFP_KERNELMiao Xie
In the filesystem context, we must allocate memory by GFP_NOFS, or we may start another filesystem operation and make kswap thread hang up. Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-03-28Btrfs: check return value of read_tree_block()Tsutomu Itoh
This patch is checking return value of read_tree_block(), and if it is NULL, error processing. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-03-28btrfs: properly access unaligned checksum bufferDavid Sterba
On Fri, Mar 18, 2011 at 11:56:53AM -0400, Chris Mason wrote: > Thanks for fielding this one. Does put_unaligned_le32 optimize away on > platforms with efficient access? It would be great if we didn't need > the #ifdef. (quicktest: assembly output is same for put_unaligned_le32 and direct assignment on my x86_64) I was originally following examples in Documentation/unaligned-memory-access.txt. From other code it seems to me that the define CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS is intended for larger portions of code. Macros/wrappers for {put,get}_unaligned* are chosen via arch/<arch>/include/asm/unaligned.h accordingly, therefore it's safe to use put_unaligned_le32 without the ifdef. dave Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-03-28Btrfs: cleanup some BUG_ON()Tsutomu Itoh
This patch changes some BUG_ON() to the error return. (but, most callers still use BUG_ON()) Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
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