linux/fs/ext4, branch v3.19

Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

2015-01-06T22:05:40Z

Pull ext4 bugfixes from Ted Ts'o: "Revert a potential seek_data/hole regression which shows up when using ext4 to handle ext3 file systems, plus two minor bug fixes" * tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext4: remove spurious KERN_INFO from ext4_warning call Revert "ext4: fix suboptimal seek_{data,hole} extents traversial" ext4: prevent online resize with backup superblock

ext4: remove spurious KERN_INFO from ext4_warning call

2015-01-02T20:31:14Z

Signed-off-by: Jakub Wilk Signed-off-by: Theodore Ts'o

Revert "ext4: fix suboptimal seek_{data,hole} extents traversial"

2015-01-02T20:16:00Z

This reverts commit 14516bb7bb6ffbd49f35389f9ece3b2045ba5815. This was causing regression test failures with generic/285 with an ext3 filesystem using CONFIG_EXT4_USE_FOR_EXT23. Signed-off-by: Theodore Ts'o

ext4: prevent online resize with backup superblock

2014-12-27T04:58:21Z

Prevent BUG or corrupted file systems after the following: mkfs.ext4 /dev/vdc 100M mount -t ext4 -o sb=40961 /dev/vdc /vdc resize2fs /dev/vdc We previously prevented online resizing using the old resize ioctl. Move the code to ext4_resize_begin(), so the check applies for all of the resize ioctl's. Reported-by: Maxim Malkov Signed-off-by: Theodore Ts'o

move_extent_per_page(): get rid of unused w_flags

2014-12-17T11:43:56Z

... and comparing get_fs() with KERNEL_DS used only to initialize that Signed-off-by: Al Viro

Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

2014-12-12T17:28:03Z

Pull ext4 updates from Ted Ts'o: "Lots of bugs fixes, including Zheng and Jan's extent status shrinker fixes, which should improve CPU utilization and potential soft lockups under heavy memory pressure, and Eric Whitney's bigalloc fixes" * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (26 commits) ext4: ext4_da_convert_inline_data_to_extent drop locked page after error ext4: fix suboptimal seek_{data,hole} extents traversial ext4: ext4_inline_data_fiemap should respect callers argument ext4: prevent fsreentrance deadlock for inline_data ext4: forbid journal_async_commit in data=ordered mode jbd2: remove unnecessary NULL check before iput() ext4: Remove an unnecessary check for NULL before iput() ext4: remove unneeded code in ext4_unlink ext4: don't count external journal blocks as overhead ext4: remove never taken branch from ext4_ext_shift_path_extents() ext4: create nojournal_checksum mount option ext4: update comments regarding ext4_delete_inode() ext4: cleanup GFP flags inside resize path ext4: introduce aging to extent status tree ext4: cleanup flag definitions for extent status tree ext4: limit number of scanned extents in status tree shrinker ext4: move handling of list of shrinkable inodes into extent status code ext4: change LRU to round-robin in extent status tree shrinker ext4: cache extent hole in extent status tree for ext4_da_map_blocks() ext4: fix block reservation for bigalloc filesystems ...

ext4: ext4_da_convert_inline_data_to_extent drop locked page after error

2014-12-06T02:37:15Z

Testcase: xfstests generic/270 MKFS_OPTIONS="-q -I 256 -O inline_data,64bit" Call Trace: [] lock_page+0x35/0x39 -------> DEADLOCK [] pagecache_get_page+0x65/0x15a [] truncate_inode_pages_range+0x1db/0x45c [] ? ext4_da_get_block_prep+0x439/0x4b6 [] ? __block_write_begin+0x284/0x29c [] ? ext4_change_inode_journal_flag+0x16b/0x16b [] truncate_inode_pages+0x12/0x14 [] ext4_truncate_failed_write+0x19/0x25 [] ext4_da_write_inline_data_begin+0x196/0x31c [] ext4_da_write_begin+0x189/0x302 [] ? trace_hardirqs_on+0xd/0xf [] ? read_seqcount_begin.clone.1+0x9f/0xcc [] generic_perform_write+0xc7/0x1c6 [] ? mark_held_locks+0x59/0x77 [] __generic_file_write_iter+0x17f/0x1c5 [] ext4_file_write_iter+0x2a5/0x354 [] ? file_start_write+0x2a/0x2c [] ? bad_area_nosemaphore+0x13/0x15 [] new_sync_write+0x8a/0xb2 [] vfs_write+0xb5/0x14d [] SyS_write+0x5c/0x8c [] system_call_fastpath+0x12/0x17 Signed-off-by: Dmitry Monakhov Signed-off-by: Theodore Ts'o

ext4: fix suboptimal seek_{data,hole} extents traversial

2014-12-02T23:08:53Z

It is ridiculous practice to scan inode block by block, this technique applicable only for old indirect files. This takes significant amount of time for really large files. Let's reuse ext4_fiemap which already traverse inode-tree in most optimal meaner. TESTCASE: ftruncate64(fd, 0); ftruncate64(fd, 1ULL << 40); /* lseek will spin very long time */ lseek64(fd, 0, SEEK_DATA); lseek64(fd, 0, SEEK_HOLE); Original report: https://lkml.org/lkml/2014/10/16/620 Signed-off-by: Dmitry Monakhov Signed-off-by: Theodore Ts'o

ext4: ext4_inline_data_fiemap should respect callers argument

2014-12-02T21:11:20Z

Currently ext4_inline_data_fiemap ignores requested arguments (start and len) which may lead endless loop if start != 0. Also fix incorrect extent length determination. Signed-off-by: Dmitry Monakhov Signed-off-by: Theodore Ts'o

ext4: prevent fsreentrance deadlock for inline_data

2014-12-02T21:09:50Z

ext4_da_convert_inline_data_to_extent() invokes grab_cache_page_write_begin(). grab_cache_page_write_begin performs memory allocation, so fs-reentrance should be prohibited because we are inside journal transaction. Signed-off-by: Dmitry Monakhov Signed-off-by: Theodore Ts'o