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Subject[PATCH V3 01/21] ext4: Move extra inode read to a new function.
Date
From: Tao Ma <boyu.mt@taobao.com>

Currently, in ext4_iget we do a simple check to see whether
there does exist some information starting from the end
of i_extra_size. With inline data added, this procedure
is more complicated. So move it to a new function named
ext4_iget_extra_inode.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
---
fs/ext4/inode.c | 19 ++++++++++++-------
1 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index fffec40..dc55c1f 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3762,6 +3762,16 @@ static blkcnt_t ext4_inode_blocks(struct ext4_inode *raw_inode,
}
}

+static inline void ext4_iget_extra_inode(struct inode *inode,
+ struct ext4_inode *raw_inode,
+ struct ext4_inode_info *ei)
+{
+ __le32 *magic = (void *)raw_inode +
+ EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize;
+ if (*magic == cpu_to_le32(EXT4_XATTR_MAGIC))
+ ext4_set_inode_state(inode, EXT4_STATE_XATTR);
+}
+
struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
{
struct ext4_iloc iloc;
@@ -3872,13 +3882,8 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
/* The extra space is currently unused. Use it. */
ei->i_extra_isize = sizeof(struct ext4_inode) -
EXT4_GOOD_OLD_INODE_SIZE;
- } else {
- __le32 *magic = (void *)raw_inode +
- EXT4_GOOD_OLD_INODE_SIZE +
- ei->i_extra_isize;
- if (*magic == cpu_to_le32(EXT4_XATTR_MAGIC))
- ext4_set_inode_state(inode, EXT4_STATE_XATTR);
- }
+ } else
+ ext4_iget_extra_inode(inode, raw_inode, ei);
} else
ei->i_extra_isize = 0;

--
1.7.0.4


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