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authorLinus Torvalds <torvalds@linux-foundation.org>2012-08-02 10:56:34 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-08-02 10:56:34 -0700
commit410fc4ce8a373a3c35c73ac2c7c29f2bac6400bf (patch)
tree8a9e2e29f13a3ba93689f4afb951d64ffc10c9d5 /fs/ecryptfs/inode.c
parent630103ea2c286de3e7ea9ae6b1035d91ef051413 (diff)
parent5f5b331d5c21228a6519dcb793fc1629646c51a6 (diff)
Merge tag 'ecryptfs-3.6-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs
Pull ecryptfs fixes from Tyler Hicks: - Fixes a bug when the lower filesystem mount options include 'acl', but the eCryptfs mount options do not - Cleanups in the messaging code - Better handling of empty files in the lower filesystem to improve usability. Failed file creations are now cleaned up and empty lower files are converted into eCryptfs during open(). - The write-through cache changes are being reverted due to bugs that are not easy to fix. Stability outweighs the performance enhancements here. - Improvement to the mount code to catch unsupported ciphers specified in the mount options * tag 'ecryptfs-3.6-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs: eCryptfs: check for eCryptfs cipher support at mount eCryptfs: Revert to a writethrough cache model eCryptfs: Initialize empty lower files when opening them eCryptfs: Unlink lower inode when ecryptfs_create() fails eCryptfs: Make all miscdev functions use daemon ptr in file private_data eCryptfs: Remove unused messaging declarations and function eCryptfs: Copy up POSIX ACL and read-only flags from lower mount
Diffstat (limited to 'fs/ecryptfs/inode.c')
-rw-r--r--fs/ecryptfs/inode.c65
1 files changed, 34 insertions, 31 deletions
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index c3ca12c33ca..534b129ea67 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -143,6 +143,31 @@ static int ecryptfs_interpose(struct dentry *lower_dentry,
return 0;
}
+static int ecryptfs_do_unlink(struct inode *dir, struct dentry *dentry,
+ struct inode *inode)
+{
+ struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
+ struct inode *lower_dir_inode = ecryptfs_inode_to_lower(dir);
+ struct dentry *lower_dir_dentry;
+ int rc;
+
+ dget(lower_dentry);
+ lower_dir_dentry = lock_parent(lower_dentry);
+ rc = vfs_unlink(lower_dir_inode, lower_dentry);
+ if (rc) {
+ printk(KERN_ERR "Error in vfs_unlink; rc = [%d]\n", rc);
+ goto out_unlock;
+ }
+ fsstack_copy_attr_times(dir, lower_dir_inode);
+ set_nlink(inode, ecryptfs_inode_to_lower(inode)->i_nlink);
+ inode->i_ctime = dir->i_ctime;
+ d_drop(dentry);
+out_unlock:
+ unlock_dir(lower_dir_dentry);
+ dput(lower_dentry);
+ return rc;
+}
+
/**
* ecryptfs_do_create
* @directory_inode: inode of the new file's dentry's parent in ecryptfs
@@ -182,8 +207,10 @@ ecryptfs_do_create(struct inode *directory_inode,
}
inode = __ecryptfs_get_inode(lower_dentry->d_inode,
directory_inode->i_sb);
- if (IS_ERR(inode))
+ if (IS_ERR(inode)) {
+ vfs_unlink(lower_dir_dentry->d_inode, lower_dentry);
goto out_lock;
+ }
fsstack_copy_attr_times(directory_inode, lower_dir_dentry->d_inode);
fsstack_copy_inode_size(directory_inode, lower_dir_dentry->d_inode);
out_lock:
@@ -200,8 +227,8 @@ out:
*
* Returns zero on success
*/
-static int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry,
- struct inode *ecryptfs_inode)
+int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry,
+ struct inode *ecryptfs_inode)
{
struct ecryptfs_crypt_stat *crypt_stat =
&ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat;
@@ -264,7 +291,9 @@ ecryptfs_create(struct inode *directory_inode, struct dentry *ecryptfs_dentry,
* that this on disk file is prepared to be an ecryptfs file */
rc = ecryptfs_initialize_file(ecryptfs_dentry, ecryptfs_inode);
if (rc) {
- drop_nlink(ecryptfs_inode);
+ ecryptfs_do_unlink(directory_inode, ecryptfs_dentry,
+ ecryptfs_inode);
+ make_bad_inode(ecryptfs_inode);
unlock_new_inode(ecryptfs_inode);
iput(ecryptfs_inode);
goto out;
@@ -466,27 +495,7 @@ out_lock:
static int ecryptfs_unlink(struct inode *dir, struct dentry *dentry)
{
- int rc = 0;
- struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
- struct inode *lower_dir_inode = ecryptfs_inode_to_lower(dir);
- struct dentry *lower_dir_dentry;
-
- dget(lower_dentry);
- lower_dir_dentry = lock_parent(lower_dentry);
- rc = vfs_unlink(lower_dir_inode, lower_dentry);
- if (rc) {
- printk(KERN_ERR "Error in vfs_unlink; rc = [%d]\n", rc);
- goto out_unlock;
- }
- fsstack_copy_attr_times(dir, lower_dir_inode);
- set_nlink(dentry->d_inode,
- ecryptfs_inode_to_lower(dentry->d_inode)->i_nlink);
- dentry->d_inode->i_ctime = dir->i_ctime;
- d_drop(dentry);
-out_unlock:
- unlock_dir(lower_dir_dentry);
- dput(lower_dentry);
- return rc;
+ return ecryptfs_do_unlink(dir, dentry, dentry->d_inode);
}
static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry,
@@ -961,12 +970,6 @@ static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia)
goto out;
}
- if (S_ISREG(inode->i_mode)) {
- rc = filemap_write_and_wait(inode->i_mapping);
- if (rc)
- goto out;
- fsstack_copy_attr_all(inode, lower_inode);
- }
memcpy(&lower_ia, ia, sizeof(lower_ia));
if (ia->ia_valid & ATTR_FILE)
lower_ia.ia_file = ecryptfs_file_to_lower(ia->ia_file);