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ext4 crypto: add symlink encryption

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Signed-off-by: Uday Savagaonkar <savagaon@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o
2015-04-16 01:55:00 -04:00
parent 4461471107
commit f348c25232
5 changed files with 184 additions and 23 deletions
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5
fs/ext4/inode.c
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@@ -139,7 +139,7 @@ static int ext4_meta_trans_blocks(struct inode *inode, int lblocks,
/*
* Test whether an inode is a fast symlink.
*/
static int ext4_inode_is_fast_symlink(struct inode *inode)
int ext4_inode_is_fast_symlink(struct inode *inode)
{
int ea_blocks = EXT4_I(inode)->i_file_acl ?
EXT4_CLUSTER_SIZE(inode->i_sb) >> 9 : 0;
@@ -4215,7 +4215,8 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
inode->i_op = &ext4_dir_inode_operations;
inode->i_fop = &ext4_dir_operations;
} else if (S_ISLNK(inode->i_mode)) {
if (ext4_inode_is_fast_symlink(inode)) {
if (ext4_inode_is_fast_symlink(inode) &&
!ext4_encrypted_inode(inode)) {
inode->i_op = &ext4_fast_symlink_inode_operations;
nd_terminate_link(ei->i_data, inode->i_size,
sizeof(ei->i_data) - 1);