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ext4: let ext4_rename handle inline dir

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In case we rename a directory, ext4_rename has to read the dir block
and change its dotdot's information.  The old ext4_rename encapsulated
the dir_block read into itself.  So this patch adds a new function
ext4_get_first_dir_block() which gets the dir buffer information so
the ext4_rename can handle it properly.  As it will also change the
parent inode number, we return the parent_de so that ext4_rename() can
handle it more easily.

ext4_find_entry is also changed so that the caller(rename) can tell
whether the found entry is an inlined one or not and journaling the
corresponding buffer head.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Tao Ma
2012-12-10 14:06:01 -05:00
committed by Theodore Ts'o
parent 61f86638d8
commit 32f7f22c0b
3 changed files with 100 additions and 35 deletions
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fs/ext4/inline.c
+15
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@@ -1424,6 +1424,21 @@ out:
return ret;
}
struct buffer_head *ext4_get_first_inline_block(struct inode *inode,
struct ext4_dir_entry_2 **parent_de,
int *retval)
{
struct ext4_iloc iloc;
*retval = ext4_get_inode_loc(inode, &iloc);
if (*retval)
return NULL;
*parent_de = (struct ext4_dir_entry_2 *)ext4_raw_inode(&iloc)->i_block;
return iloc.bh;
}
/*
* Try to create the inline data for the new dir.
* If it succeeds, return 0, otherwise return the error.