diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-08-02 10:56:34 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-08-02 10:56:34 -0700 |
commit | 410fc4ce8a373a3c35c73ac2c7c29f2bac6400bf (patch) | |
tree | 8a9e2e29f13a3ba93689f4afb951d64ffc10c9d5 /fs/ecryptfs/main.c | |
parent | 630103ea2c286de3e7ea9ae6b1035d91ef051413 (diff) | |
parent | 5f5b331d5c21228a6519dcb793fc1629646c51a6 (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/main.c')
-rw-r--r-- | fs/ecryptfs/main.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c index 1c0b3b6b75c6..2768138eefee 100644 --- a/fs/ecryptfs/main.c +++ b/fs/ecryptfs/main.c @@ -279,6 +279,7 @@ static int ecryptfs_parse_options(struct ecryptfs_sb_info *sbi, char *options, char *fnek_src; char *cipher_key_bytes_src; char *fn_cipher_key_bytes_src; + u8 cipher_code; *check_ruid = 0; @@ -420,6 +421,18 @@ static int ecryptfs_parse_options(struct ecryptfs_sb_info *sbi, char *options, && !fn_cipher_key_bytes_set) mount_crypt_stat->global_default_fn_cipher_key_bytes = mount_crypt_stat->global_default_cipher_key_size; + + cipher_code = ecryptfs_code_for_cipher_string( + mount_crypt_stat->global_default_cipher_name, + mount_crypt_stat->global_default_cipher_key_size); + if (!cipher_code) { + ecryptfs_printk(KERN_ERR, + "eCryptfs doesn't support cipher: %s", + mount_crypt_stat->global_default_cipher_name); + rc = -EINVAL; + goto out; + } + mutex_lock(&key_tfm_list_mutex); if (!ecryptfs_tfm_exists(mount_crypt_stat->global_default_cipher_name, NULL)) { @@ -540,6 +553,15 @@ static struct dentry *ecryptfs_mount(struct file_system_type *fs_type, int flags } ecryptfs_set_superblock_lower(s, path.dentry->d_sb); + + /** + * Set the POSIX ACL flag based on whether they're enabled in the lower + * mount. Force a read-only eCryptfs mount if the lower mount is ro. + * Allow a ro eCryptfs mount even when the lower mount is rw. + */ + s->s_flags = flags & ~MS_POSIXACL; + s->s_flags |= path.dentry->d_sb->s_flags & (MS_RDONLY | MS_POSIXACL); + s->s_maxbytes = path.dentry->d_sb->s_maxbytes; s->s_blocksize = path.dentry->d_sb->s_blocksize; s->s_magic = ECRYPTFS_SUPER_MAGIC; |