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  1. 25 1月, 2010 2 次提交
  3. 07 12月, 2009 1 次提交
    • T
      ext4: Use slab allocator for sub-page sized allocations · d2eecb03
      由 Theodore Ts'o 提交于 
      Now that the SLUB seems to be fixed so that it respects the requested
alignment, use kmem_cache_alloc() to allocator if the block size of
the buffer heads to be allocated is less than the page size.
Previously, we were using 16k page on a Power system for each buffer,
even when the file system was using 1k or 4k block size.
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
      d2eecb03
  5. 01 1月, 2010 1 次提交
  7. 23 12月, 2009 1 次提交
  9. 23 1月, 2010 1 次提交
    • T
      ext4: Add block validity check when truncating indirect block mapped inodes · 1f2acb60
      由 Theodore Ts'o 提交于 
      Add checks to ext4_free_branches() to make sure a block number found
in an indirect block are valid before trying to free it.  If a bad
block number is found, stop freeing the indirect block immediately,
since the file system is corrupt and we will need to run fsck anyway.
This also avoids spamming the logs, and specifically avoids
driver-level "attempt to access beyond end of device" errors obscure
what is really going on.

If you get *really*, *really*, *really* unlucky, without this patch, a
supposed indirect block containing garbage might contain a reference
to a primary block group descriptor, in which case
ext4_free_branches() could end up zero'ing out a block group
descriptor block, and if then one of the block bitmaps for a block
group described by that bg descriptor block is not in memory, and is
read in by ext4_read_block_bitmap().  This function calls
ext4_valid_block_bitmap(), which assumes that bg_inode_table() was
validated at mount time and hasn't been modified since.  Since this
assumption is no longer valid, it's possible for the value
(ext4_inode_table(sb, desc) - group_first_block) to go negative, which
will cause ext4_find_next_zero_bit() to trigger a kernel GPF.

Addresses-Google-Bug: #2220436
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
      1f2acb60
  11. 16 2月, 2010 1 次提交
    • E
      ext4: Fix optional-arg mount options · 15121c18
      由 Eric Sandeen 提交于 
      We have 2 mount options, "barrier" and "auto_da_alloc" which may or
may not take a 1/0 argument.  This causes the ext4 superblock mount
code to subtract uninitialized pointers and pass the result to
kmalloc, which results in very noisy failures.

Per Ted's suggestion, initialize the args struct so that
we know whether match_token() found an argument for the
option, and skip match_int() if not.

Also, return error (0) from parse_options if we thought
we found an argument, but match_int() Fails.
Reported-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NEric Sandeen <sandeen@redhat.com>
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
      15121c18
  13. 05 2月, 2010 1 次提交
  15. 13 2月, 2010 8 次提交
  17. 12 2月, 2010 24 次提交