linux/fs/ext4/ialloc.c, branch v3.5

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

2012-06-01T17:12:15Z

Pull Ext4 updates from Theodore Ts'o: "The major new feature added in this update is Darrick J Wong's metadata checksum feature, which adds crc32 checksums to ext4's metadata fields. There is also the usual set of cleanups and bug fixes." * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (44 commits) ext4: hole-punch use truncate_pagecache_range jbd2: use kmem_cache_zalloc wrapper instead of flag ext4: remove mb_groups before tearing down the buddy_cache ext4: add ext4_mb_unload_buddy in the error path ext4: don't trash state flags in EXT4_IOC_SETFLAGS ext4: let getattr report the right blocks in delalloc+bigalloc ext4: add missing save_error_info() to ext4_error() ext4: add debugging trigger for ext4_error() ext4: protect group inode free counting with group lock ext4: use consistent ssize_t type in ext4_file_write() ext4: fix format flag in ext4_ext_binsearch_idx() ext4: cleanup in ext4_discard_allocated_blocks() ext4: return ENOMEM when mounts fail due to lack of memory ext4: remove redundundant "(char *) bh->b_data" casts ext4: disallow hard-linked directory in ext4_lookup ext4: fix potential integer overflow in alloc_flex_gd() ext4: remove needs_recovery in ext4_mb_init() ext4: force ro mount if ext4_setup_super() fails ext4: fix potential NULL dereference in ext4_free_inodes_counts() ext4/jbd2: add metadata checksumming to the list of supported features ...

ext4: protect group inode free counting with group lock

2012-05-28T22:20:59Z

Now when we set the group inode free count, we don't have a proper group lock so that multiple threads may decrease the inode free count at the same time. And e2fsck will complain something like: Free inodes count wrong for group #1 (1, counted=0). Fix? no Free inodes count wrong for group #2 (3, counted=0). Fix? no Directories count wrong for group #2 (780, counted=779). Fix? no Free inodes count wrong for group #3 (2272, counted=2273). Fix? no So this patch try to protect it with the ext4_lock_group. btw, it is found by xfstests test case 269 and the volume is mkfsed with the parameter "-O ^resize_inode,^uninit_bg,extent,meta_bg,flex_bg,ext_attr" and I have run it 100 times and the error in e2fsck doesn't show up again. Signed-off-by: Tao Ma Signed-off-by: "Theodore Ts'o"

ext4: fix potential NULL dereference in ext4_free_inodes_counts()

2012-05-28T18:16:57Z

The ext4_get_group_desc() function returns NULL on error, and ext4_free_inodes_count() function dereferences it without checking. There is a check on the next line, but it's too late. Reviewed-by: Jan Kara Signed-off-by: Dan Carpenter Signed-off-by: "Theodore Ts'o" Cc: stable@kernel.org

userns: Convert ext4 to user kuid/kgid where appropriate

2012-05-15T21:59:27Z

Acked-by: Serge Hallyn Signed-off-by: Eric W. Biederman

ext4: make block group checksums use metadata_csum algorithm

2012-04-29T22:45:10Z

metadata_csum supersedes uninit_bg. Convert the ROCOMPAT uninit_bg flag check to a helper function that covers both, and make the checksum calculation algorithm use either crc16 or the metadata_csum chosen algorithm depending on which flag is set. Print a warning if we try to mount a filesystem with both feature flags set. Signed-off-by: Darrick J. Wong Signed-off-by: "Theodore Ts'o"

ext4: calculate and verify block bitmap checksum

2012-04-29T22:35:10Z

Compute and verify the checksum of the block bitmap; this checksum is stored in the block group descriptor. Signed-off-by: Darrick J. Wong Signed-off-by: "Theodore Ts'o"

ext4: calculate and verify checksums for inode bitmaps

2012-04-29T22:33:10Z

Compute and verify the checksum of the inode bitmap; the checkum is stored in the block group descriptor. Signed-off-by: Darrick J. Wong Signed-off-by: "Theodore Ts'o"

ext4: calculate and verify inode checksums

2012-04-29T22:31:10Z

This patch introduces to ext4 the ability to calculate and verify inode checksums. This requires the use of a new ro compatibility flag and some accompanying e2fsprogs patches to provide the relevant features in tune2fs and e2fsck. The inode generation changes have been integrated into this patch. Signed-off-by: Darrick J. Wong Signed-off-by: "Theodore Ts'o"

ext4: change some printk() calls to use ext4_msg() instead

2012-03-20T03:41:49Z

Signed-off-by: "Theodore Ts'o"

ext4: remove trailing newlines from ext4_msg() and ext4_error() messages

2012-03-20T03:13:43Z

The functions ext4_msg() and ext4_error() already tack on a trailing newline, so remove the unnecessary extra newline. Signed-off-by: "Theodore Ts'o"