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ext4: Enable extent format for symlinks.

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This patch enables extent-formatted normal symlinks.  Using extents
format allows a symlink to refer to a block number larger than 2^32
on large filesystems.  We still don't enable extent format for fast
symlinks, which are contained in the inode itself.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Aneesh Kumar K.V 2008-04-29 08:11:12 -04:00 • committed by Theodore Ts'o
parent 95c3889cb8
commit e65187e6d0
2 changed files with 4 additions and 2 deletions
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4
fs/ext4/ialloc.c
View file

@ -750,8 +750,8 @@ got:
goto fail_free_drop; goto fail_free_drop;
} }
if (test_opt(sb, EXTENTS)) { if (test_opt(sb, EXTENTS)) {
/* set extent flag only for directory and file */ /* set extent flag only for diretory, file and normal symlink*/
if (S_ISDIR(mode) || S_ISREG(mode)) { if (S_ISDIR(mode) || S_ISREG(mode) || S_ISLNK(mode)) {
EXT4_I(inode)->i_flags |= EXT4_EXTENTS_FL; EXT4_I(inode)->i_flags |= EXT4_EXTENTS_FL;
ext4_ext_tree_init(handle, inode); ext4_ext_tree_init(handle, inode);
err = ext4_update_incompat_feature(handle, sb, err = ext4_update_incompat_feature(handle, sb,

2
fs/ext4/namei.c
View file

@ -2217,6 +2217,8 @@ retry:
goto out_stop; goto out_stop;
} }
} else { } else {
/* clear the extent format for fast symlink */
EXT4_I(inode)->i_flags &= ~EXT4_EXTENTS_FL;
inode->i_op = &ext4_fast_symlink_inode_operations; inode->i_op = &ext4_fast_symlink_inode_operations;
memcpy((char*)&EXT4_I(inode)->i_data,symname,l); memcpy((char*)&EXT4_I(inode)->i_data,symname,l);
inode->i_size = l-1; inode->i_size = l-1;