diff options
Diffstat (limited to 'fs/ecryptfs/inode.c')
-rw-r--r-- | fs/ecryptfs/inode.c | 104 |
1 files changed, 48 insertions, 56 deletions
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c index a07441a0a878..534b129ea676 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 @@ -173,7 +198,7 @@ ecryptfs_do_create(struct inode *directory_inode, inode = ERR_CAST(lower_dir_dentry); goto out; } - rc = vfs_create(lower_dir_dentry->d_inode, lower_dentry, mode, NULL); + rc = vfs_create(lower_dir_dentry->d_inode, lower_dentry, mode, true); if (rc) { printk(KERN_ERR "%s: Failure to create dentry in lower fs; " "rc = [%d]\n", __func__, rc); @@ -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; @@ -240,7 +267,6 @@ out: * @dir: The inode of the directory in which to create the file. * @dentry: The eCryptfs dentry * @mode: The mode of the new file. - * @nd: nameidata * * Creates a new file. * @@ -248,7 +274,7 @@ out: */ static int ecryptfs_create(struct inode *directory_inode, struct dentry *ecryptfs_dentry, - umode_t mode, struct nameidata *nd) + umode_t mode, bool excl) { struct inode *ecryptfs_inode; int rc; @@ -265,13 +291,15 @@ 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; } - d_instantiate(ecryptfs_dentry, ecryptfs_inode); unlock_new_inode(ecryptfs_inode); + d_instantiate(ecryptfs_dentry, ecryptfs_inode); out: return rc; } @@ -319,21 +347,20 @@ static int ecryptfs_lookup_interpose(struct dentry *dentry, struct vfsmount *lower_mnt; int rc = 0; - lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(dentry->d_parent)); - fsstack_copy_attr_atime(dir_inode, lower_dentry->d_parent->d_inode); - BUG_ON(!lower_dentry->d_count); - dentry_info = kmem_cache_alloc(ecryptfs_dentry_info_cache, GFP_KERNEL); - ecryptfs_set_dentry_private(dentry, dentry_info); if (!dentry_info) { printk(KERN_ERR "%s: Out of memory whilst attempting " "to allocate ecryptfs_dentry_info struct\n", __func__); dput(lower_dentry); - mntput(lower_mnt); - d_drop(dentry); return -ENOMEM; } + + lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(dentry->d_parent)); + fsstack_copy_attr_atime(dir_inode, lower_dentry->d_parent->d_inode); + BUG_ON(!lower_dentry->d_count); + + ecryptfs_set_dentry_private(dentry, dentry_info); ecryptfs_set_dentry_lower(dentry, lower_dentry); ecryptfs_set_dentry_lower_mnt(dentry, lower_mnt); @@ -374,7 +401,7 @@ static int ecryptfs_lookup_interpose(struct dentry *dentry, */ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode, struct dentry *ecryptfs_dentry, - struct nameidata *ecryptfs_nd) + unsigned int flags) { char *encrypted_and_encoded_name = NULL; size_t encrypted_and_encoded_name_size; @@ -382,12 +409,6 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode, struct dentry *lower_dir_dentry, *lower_dentry; int rc = 0; - if ((ecryptfs_dentry->d_name.len == 1 - && !strcmp(ecryptfs_dentry->d_name.name, ".")) - || (ecryptfs_dentry->d_name.len == 2 - && !strcmp(ecryptfs_dentry->d_name.name, ".."))) { - goto out_d_drop; - } lower_dir_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry->d_parent); mutex_lock(&lower_dir_dentry->d_inode->i_mutex); lower_dentry = lookup_one_len(ecryptfs_dentry->d_name.name, @@ -398,8 +419,8 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode, rc = PTR_ERR(lower_dentry); ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_len() returned " "[%d] on lower_dentry = [%s]\n", __func__, rc, - encrypted_and_encoded_name); - goto out_d_drop; + ecryptfs_dentry->d_name.name); + goto out; } if (lower_dentry->d_inode) goto interpose; @@ -416,7 +437,7 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode, if (rc) { printk(KERN_ERR "%s: Error attempting to encrypt and encode " "filename; rc = [%d]\n", __func__, rc); - goto out_d_drop; + goto out; } mutex_lock(&lower_dir_dentry->d_inode->i_mutex); lower_dentry = lookup_one_len(encrypted_and_encoded_name, @@ -428,14 +449,11 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode, ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_len() returned " "[%d] on lower_dentry = [%s]\n", __func__, rc, encrypted_and_encoded_name); - goto out_d_drop; + goto out; } interpose: rc = ecryptfs_lookup_interpose(ecryptfs_dentry, lower_dentry, ecryptfs_dir_inode); - goto out; -out_d_drop: - d_drop(ecryptfs_dentry); out: kfree(encrypted_and_encoded_name); return ERR_PTR(rc); @@ -477,27 +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, @@ -972,12 +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); |