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Commit e65187e6 authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Theodore Ts'o
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ext4: Enable extent format for symlinks. 



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: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: default avatarMingming Cao <cmm@us.ibm.com>
Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
parent 95c3889c

fs/ext4/ialloc.c

+2 −2
Original line number Diff line number Diff line
@@ -750,8 +750,8 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode * dir, int mode) 
		goto fail_free_drop;

	}

	if (test_opt(sb, EXTENTS)) {

		/* set extent flag only for directory and file */

		if (S_ISDIR(mode) || S_ISREG(mode)) {

		/* set extent flag only for diretory, file and normal symlink*/

		if (S_ISDIR(mode) || S_ISREG(mode) || S_ISLNK(mode)) {

			EXT4_I(inode)->i_flags |= EXT4_EXTENTS_FL;

			ext4_ext_tree_init(handle, inode);

			err = ext4_update_incompat_feature(handle, sb,

fs/ext4/namei.c

+2 −0
Original line number Diff line number Diff line
@@ -2217,6 +2217,8 @@ static int ext4_symlink (struct inode * dir, 
			goto out_stop;

		}

	} else {

		/* clear the extent format for fast symlink */

		EXT4_I(inode)->i_flags &= ~EXT4_EXTENTS_FL;

		inode->i_op = &ext4_fast_symlink_inode_operations;

		memcpy((char*)&EXT4_I(inode)->i_data,symname,l);

		inode->i_size = l-1;