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authorMichael Halcrow <mhalcrow@us.ibm.com>2007-10-16 04:28:09 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 12:43:12 -0400
commit4981e081cfe2c3f4abcfa3924ebd999cdbed4914 (patch)
tree066d56ba49195eb0e733236fef4bb98f2d5f0114 /fs/ecryptfs/super.c
parent0216f7f7921759211e48e8b940eae29f0fe43902 (diff)
eCryptfs: set up and destroy persistent lower file
This patch sets up and destroys the persistent lower file for each eCryptfs inode. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ecryptfs/super.c')
-rw-r--r--fs/ecryptfs/super.c22
1 files changed, 19 insertions, 3 deletions
diff --git a/fs/ecryptfs/super.c b/fs/ecryptfs/super.c
index 18d77f8aa7cd..b97e2106f670 100644
--- a/fs/ecryptfs/super.c
+++ b/fs/ecryptfs/super.c
@@ -27,6 +27,7 @@
27#include <linux/mount.h> 27#include <linux/mount.h>
28#include <linux/key.h> 28#include <linux/key.h>
29#include <linux/seq_file.h> 29#include <linux/seq_file.h>
30#include <linux/file.h>
30#include <linux/crypto.h> 31#include <linux/crypto.h>
31#include "ecryptfs_kernel.h" 32#include "ecryptfs_kernel.h"
32 33
@@ -63,9 +64,10 @@ out:
63 * ecryptfs_destroy_inode 64 * ecryptfs_destroy_inode
64 * @inode: The ecryptfs inode 65 * @inode: The ecryptfs inode
65 * 66 *
66 * This is used during the final destruction of the inode. 67 * This is used during the final destruction of the inode. All
67 * All allocation of memory related to the inode, including allocated 68 * allocation of memory related to the inode, including allocated
68 * memory in the crypt_stat struct, will be released here. 69 * memory in the crypt_stat struct, will be released here. This
70 * function also fput()'s the persistent file for the lower inode.
69 * There should be no chance that this deallocation will be missed. 71 * There should be no chance that this deallocation will be missed.
70 */ 72 */
71static void ecryptfs_destroy_inode(struct inode *inode) 73static void ecryptfs_destroy_inode(struct inode *inode)
@@ -73,6 +75,20 @@ static void ecryptfs_destroy_inode(struct inode *inode)
73 struct ecryptfs_inode_info *inode_info; 75 struct ecryptfs_inode_info *inode_info;
74 76
75 inode_info = ecryptfs_inode_to_private(inode); 77 inode_info = ecryptfs_inode_to_private(inode);
78 mutex_lock(&inode_info->lower_file_mutex);
79 if (inode_info->lower_file) {
80 struct dentry *lower_dentry =
81 inode_info->lower_file->f_dentry;
82
83 BUG_ON(!lower_dentry);
84 if (lower_dentry->d_inode) {
85 fput(inode_info->lower_file);
86 inode_info->lower_file = NULL;
87 d_drop(lower_dentry);
88 d_delete(lower_dentry);
89 }
90 }
91 mutex_unlock(&inode_info->lower_file_mutex);
76 ecryptfs_destroy_crypt_stat(&inode_info->crypt_stat); 92 ecryptfs_destroy_crypt_stat(&inode_info->crypt_stat);
77 kmem_cache_free(ecryptfs_inode_info_cache, inode_info); 93 kmem_cache_free(ecryptfs_inode_info_cache, inode_info);
78} 94}