linux-toradex.git/include/linux/ext4_fs.h, branch v2.6.25-rc2

ext4: Add new "development flag" to the ext4 filesystem

2008-02-10T06:11:44+00:00

This flag is simply a generic "this is a crash/burn test filesystem"
marker.  If it is set, then filesystem code which is "in development"
will be allowed to mount the filesystem.  Filesystem code which is not
considered ready for prime-time will check for this flag, and if it is
not set, it will refuse to touch the filesystem.

As we start rolling ext4 out to distro's like Fedora, et. al, this makes
it less likely that a user might accidentally start using ext4 on a
production filesystem; a bad thing, since that will essentially make it
be unfsckable until e2fsprogs catches up.

Signed-off-by: Theodore Tso 
Signed-off-by: Mingming Cao

iget: stop EXT4 from using iget() and read_inode()

2008-02-07T16:42:27+00:00

Stop the EXT4 filesystem from using iget() and read_inode().  Replace
ext4_read_inode() with ext4_iget(), and call that instead of iget().
ext4_iget() then uses iget_locked() directly and returns a proper error code
instead of an inode in the event of an error.

ext4_fill_super() returns any error incurred when getting the root inode
instead of EINVAL.

Signed-off-by: David Howells 
Acked-by: "Theodore Ts'o" 
Acked-by: Jan Kara 
Cc: 
Acked-by: Christoph Hellwig 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ext4: Add multi block allocator for ext4

2008-01-29T05:19:52+00:00

Signed-off-by: Alex Tomas 
Signed-off-by: Andreas Dilger 
Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Eric Sandeen 
Signed-off-by: "Theodore Ts'o"

ext4: Add ext4_find_next_bit()

2008-01-29T04:58:27+00:00

This function is used by the ext4 multi block allocator patches.

Also add generic_find_next_le_bit

Signed-off-by: Aneesh Kumar K.V 
Cc: 
Signed-off-by: Andrew Morton

ext4: Add EXT4_IOC_MIGRATE ioctl

2008-01-29T04:58:26+00:00

The below patch add ioctl for migrating ext3 indirect block mapped inode
to ext4 extent mapped inode.

Signed-off-by: Aneesh Kumar K.V

ext4: Add inode version support in ext4

2008-01-29T04:58:27+00:00

This patch adds 64-bit inode version support to ext4. The lower 32 bits
are stored in the osd1.linux1.l_i_version field while the high 32 bits
are stored in the i_version_hi field newly created in the ext4_inode.
This field is incremented in case the ext4_inode is large enough. A
i_version mount option has been added to enable the feature.

Signed-off-by: Mingming Cao 
Signed-off-by: Andreas Dilger 
Signed-off-by: Kalpak Shah 
Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Jean Noel Cordenner

ext4: Add the journal checksum feature

2008-01-29T04:58:27+00:00

The journal checksum feature adds two new flags i.e
JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT and JBD2_FEATURE_COMPAT_CHECKSUM.

JBD2_FEATURE_CHECKSUM flag indicates that the commit block contains the
checksum for the blocks described by the descriptor blocks.
Due to checksums, writing of the commit record no longer needs to be
synchronous. Now commit record can be sent to disk without waiting for
descriptor blocks to be written to disk. This behavior is controlled
using JBD2_FEATURE_ASYNC_COMMIT flag. Older kernels/e2fsck should not be
able to recover the journal with _ASYNC_COMMIT hence it is made
incompat.
The commit header has been extended to hold the checksum along with the
type of the checksum.

For recovery in pass scan checksums are verified to ensure the sanity
and completeness(in case of _ASYNC_COMMIT) of every transaction.

Signed-off-by: Andreas Dilger 
Signed-off-by: Girish Shilamkar 
Signed-off-by: Dave Kleikamp 
Signed-off-by: Mingming Cao

ext4: Convert truncate_mutex to read write semaphore.

2008-01-29T04:58:26+00:00

We are currently taking the truncate_mutex for every read. This would have
performance impact on large CPU configuration. Convert the lock to read write
semaphore and take read lock when we are trying to read the file.

Signed-off-by: Aneesh Kumar K.V

ext4: Make ext4_get_blocks_wrap take the truncate_mutex early.

2008-01-29T04:58:27+00:00

When doing a migrate from ext3 to ext4 inode we need to make sure the test
for inode type and walking inode data happens inside  lock. To make this
happen move truncate_mutex early before checking the i_flags.


This actually should enable us to remove the verify_chain().

Signed-off-by: Aneesh Kumar K.V

ext4: sync up block group descriptor with e2fsprogs.

2008-01-29T04:58:27+00:00

This patch extends bg_itable_unused of ext4 group descriptor
from 16bit into 32bit. In order to add bg_itable_unused_hi into
struct ext4_group_desc, some extra fields which are already introduced into
e2fsprogs are also added in for consistency.

Signed-off-by: Coly Li 
Cc: Andreas Dilger 
Signed-off-by: Mingming Cao