linux-toradex.git/include/linux/f2fs_fs.h, branch v3.12-rc7

f2fs: support the inline xattrs

2013-08-26T11:15:23+00:00

0. modified inode structure
--------------------------------------
metadata (e.g., i_mtime, i_ctime, etc)
--------------------------------------
direct pointers [0 ~ 873]

inline xattrs (200 bytes by default)

indirect pointers [0 ~ 4]
--------------------------------------
node footer
--------------------------------------

1. setxattr flow
 - read_all_xattrs copies all the xattrs from inline and xattr node block.
 - handle xattr entries
 - write_all_xattrs copies modified xattrs into inline and xattr node block.

2. getxattr flow
 - read_all_xattrs copies all the xattrs from inline and xattr node block.
 - check target entries

3. Usage
 # mount -t f2fs -o inline_xattr $DEV $MNT

 Once mounted with the inline_xattr option, f2fs marks all the newly created
 files to reserve an amount of inline xattr space explicitly inside the inode
 block. Without the mount option, f2fs will not touch any existing files and
 newly created files as well.

Signed-off-by: Jaegeuk Kim

f2fs: reserve the xattr space dynamically

2013-08-26T11:15:01+00:00

This patch enables the number of direct pointers inside on-disk inode block to
be changed dynamically according to the size of inline xattr space.

The number of direct pointers, ADDRS_PER_INODE, can be changed only if the file
has inline xattr flag.

The number of direct pointers that will be used by inline xattrs is defined as
F2FS_INLINE_XATTR_ADDRS.
Current patch assigns F2FS_INLINE_XATTR_ADDRS to 0 temporarily.

Signed-off-by: Jaegeuk Kim

f2fs: add flags for inline xattrs

2013-08-26T11:02:12+00:00

This patch adds basic inode flags for inline xattrs, F2FS_INLINE_XATTR,
and add a mount option, inline_xattr, which is enabled when xattr is set.

If the mount option is enabled, all the files are marked with the inline_xattrs
flag.

Signed-off-by: Jaegeuk Kim

f2fs: align data types between on-disk and in-memory block addresses

2013-05-28T06:03:04+00:00

The on-disk block address is defined as __le32, but in-memory block address,
block_t, does as u64.

Let's synchronize them to 32 bits.

Reported-by: Dan Carpenter 
Signed-off-by: Jaegeuk Kim

f2fs: align f2fs maximum name length to linux based filesystem

2013-03-18T12:00:35+00:00

The maximum filename length supported in linux is 255 characters.
So let's follow that.

Signed-off-by: Namjae Jeon 
Signed-off-by: Amit Sahrawat 
Signed-off-by: Jaegeuk Kim

f2fs: introduce accessor to retrieve number of dentry slots

2012-12-11T04:43:45+00:00

Simplify code by providing the accessor macro to retrieve the
number of dentry slots for a given filename length.

Signed-off-by: Namjae Jeon 
Signed-off-by: Amit Sahrawat

f2fs: fix endian conversion bugs reported by sparse

2012-12-11T04:43:42+00:00

This patch should resolve the bugs reported by the sparse tool.
Initial reports were written by "kbuild test robot" managed by fengguang.wu.

In my local machines, I've tested also by running:
> make C=2 CF="-D__CHECK_ENDIAN__"

Accordingly, I've found lots of warnings and bugs related to the endian
conversion. And I've fixed all at this moment.

Signed-off-by: Jaegeuk Kim

f2fs: add on-disk layout

2012-12-11T04:43:40+00:00

This adds a header file describing the on-disk layout of f2fs.

Signed-off-by: Changman Lee 
Signed-off-by: Chul Lee 
Signed-off-by: Jaegeuk Kim