lwn.git/fs/btrfs/ioctl.c, branch v3.10.4

btrfs: don't stop searching after encountering the wrong item

2013-05-18T01:40:10+00:00

The search ioctl skips items that are too large for a result buffer, but inline items of a certain size occuring before any search result is found would trigger an overflow and stop the search entirely. Bug: https://bugzilla.kernel.org/show_bug.cgi?id=57641 Cc: stable@vger.kernel.org Signed-off-by: Gabriel de Perthuis Signed-off-by: Josef Bacik

btrfs: read entire device info under lock

2013-05-06T19:55:25+00:00

There's a theoretical possibility of reading stale (or even more theoretically, freed) data from DEV_INFO ioctl when the device would disappear between an early mutex unlock and data being copied from the device structure. Signed-off-by: David Sterba Signed-off-by: Josef Bacik

btrfs: make static code static & remove dead code

2013-05-06T19:55:23+00:00

Big patch, but all it does is add statics to functions which are in fact static, then remove the associated dead-code fallout. removed functions: btrfs_iref_to_path() __btrfs_lookup_delayed_deletion_item() __btrfs_search_delayed_insertion_item() __btrfs_search_delayed_deletion_item() find_eb_for_page() btrfs_find_block_group() range_straddles_pages() extent_range_uptodate() btrfs_file_extent_length() btrfs_scrub_cancel_devid() btrfs_start_transaction_lflush() btrfs_print_tree() is left because it is used for debugging. btrfs_start_transaction_lflush() and btrfs_reada_detach() are left for symmetry. ulist.c functions are left, another patch will take care of those. Signed-off-by: Eric Sandeen Signed-off-by: Josef Bacik

Btrfs: rescan for qgroups

2013-05-06T19:55:19+00:00

If qgroup tracking is out of sync, a rescan operation can be started. It iterates the complete extent tree and recalculates all qgroup tracking data. This is an expensive operation and should not be used unless required. A filesystem under rescan can still be umounted. The rescan continues on the next mount. Status information is provided with a separate ioctl while a rescan operation is in progress. Signed-off-by: Jan Schmidt Signed-off-by: Josef Bacik

Btrfs: return error when we specify wrong start to defrag

2013-05-06T19:54:55+00:00

We need such a sanity check for wrong start when we defrag a file, otherwise, even with a wrong start that's larger than file size, we can end up changing not only inode's force compress flag but also FS's incompat flags. Signed-off-by: Liu Bo Reviewed-by: David Sterba Signed-off-by: Josef Bacik

Btrfs: use tree_root to avoid edquot when disabling quota

2013-05-06T19:54:41+00:00

Steps to reproduce: mkfs.btrfs mount btrfs quota enable btrfs sub create /subv btrfs qgroup limit 10K /subv btrfs quota disable /subv It is wrong for qgroup to reserve when disabling quota, so just use tree_root to avoid edquot when disabling quota. Signed-off-by: Wang Shilong Signed-off-by: Josef Bacik

Btrfs: creating the subvolume qgroup automatically when enabling quota

2013-05-06T19:54:37+00:00

Creating the subvolume/snapshots(including root subvolume) qgroup auotomatically when enabling quota. Signed-off-by: Wang Shilong Reviewed-by: Miao Xie Signed-off-by: Josef Bacik

btrfs: make subvol creation/deletion killable in the early stages

2013-05-06T19:54:26+00:00

The subvolume ioctls block on the parent directory mutex that can be held by other concurrent snapshot activity for a long time. Give the user at least some chance to get out of this situation by allowing to send a kill signal. Signed-off-by: David Sterba Signed-off-by: Josef Bacik

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs

2013-03-09T01:33:20+00:00

Pull btrfs fixes from Chris Mason: "These are scattered fixes and one performance improvement. The biggest functional change is in how we throttle metadata changes. The new code bumps our average file creation rate up by ~13% in fs_mark, and lowers CPU usage. Stefan bisected out a regression in our allocation code that made balance loop on extents larger than 256MB." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: Btrfs: improve the delayed inode throttling Btrfs: fix a mismerge in btrfs_balance() Btrfs: enforce min_bytes parameter during extent allocation Btrfs: allow running defrag in parallel to administrative tasks Btrfs: avoid deadlock on transaction waiting list Btrfs: do not BUG_ON on aborted situation Btrfs: do not BUG_ON in prepare_to_reloc Btrfs: free all recorded tree blocks on error Btrfs: build up error handling for merge_reloc_roots Btrfs: check for NULL pointer in updating reloc roots Btrfs: fix unclosed transaction handler when the async transaction commitment fails Btrfs: fix wrong handle at error path of create_snapshot() when the commit fails Btrfs: use set_nlink if our i_nlink is 0

Btrfs: allow running defrag in parallel to administrative tasks

2013-03-04T21:33:24+00:00

Commit 5ac00add added a testnset mutex and code that disallows running administrative tasks in parallel. It is prevented that the device add/delete/balance/replace/resize operations are started in parallel. By mistake, the defragmentation operation was included in the check for mutually exclusiveness as well. This is fixed with this commit. Signed-off-by: Stefan Behrens Signed-off-by: Josef Bacik