diff options
| -rw-r--r-- | fs/btrfs/ioctl.c | 3 | ||||
| -rw-r--r-- | fs/btrfs/props.c | 23 | ||||
| -rw-r--r-- | fs/btrfs/props.h | 1 | ||||
| -rw-r--r-- | fs/btrfs/xattr.c | 5 |
4 files changed, 26 insertions, 6 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 7755b503b348..3f9263ddeff8 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -284,6 +284,7 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg) binode->flags &= ~BTRFS_INODE_COMPRESS; binode->flags |= BTRFS_INODE_NOCOMPRESS; + /* set no-compression no need to validate prop here */ ret = btrfs_set_prop_trans(inode, "btrfs.compression", NULL, 0, 0); if (ret && ret != -ENODATA) @@ -299,6 +300,7 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg) binode->flags |= BTRFS_INODE_COMPRESS; binode->flags &= ~BTRFS_INODE_NOCOMPRESS; + /* compress_type is already validated during mount options */ comp = btrfs_compress_type2str(fs_info->compress_type); if (!comp || comp[0] == 0) comp = btrfs_compress_type2str(BTRFS_COMPRESS_ZLIB); @@ -309,6 +311,7 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg) goto out_drop; } else { + /* reset prop, no need of validate prop here */ ret = btrfs_set_prop_trans(inode, "btrfs.compression", NULL, 0, 0); if (ret && ret != -ENODATA) diff --git a/fs/btrfs/props.c b/fs/btrfs/props.c index 44b7bf647ab3..e356dd2a0f73 100644 --- a/fs/btrfs/props.c +++ b/fs/btrfs/props.c @@ -55,6 +55,23 @@ find_prop_handler(const char *name, return NULL; } +int btrfs_validate_prop(const char *name, const char *value, size_t value_len) +{ + const struct prop_handler *handler; + + if (strlen(name) <= XATTR_BTRFS_PREFIX_LEN) + return -EINVAL; + + handler = find_prop_handler(name, NULL); + if (!handler) + return -EINVAL; + + if (value_len == 0) + return 0; + + return handler->validate(value, value_len); +} + static int btrfs_set_prop(struct btrfs_trans_handle *trans, struct inode *inode, const char *name, const char *value, size_t value_len, int flags) @@ -62,9 +79,6 @@ static int btrfs_set_prop(struct btrfs_trans_handle *trans, struct inode *inode, const struct prop_handler *handler; int ret; - if (strlen(name) <= XATTR_BTRFS_PREFIX_LEN) - return -EINVAL; - handler = find_prop_handler(name, NULL); if (!handler) return -EINVAL; @@ -85,9 +99,6 @@ static int btrfs_set_prop(struct btrfs_trans_handle *trans, struct inode *inode, return ret; } - ret = handler->validate(value, value_len); - if (ret) - return ret; if (trans) ret = btrfs_setxattr(trans, inode, handler->xattr_name, value, value_len, flags); diff --git a/fs/btrfs/props.h b/fs/btrfs/props.h index b1a6b233b774..01d2c1899bc7 100644 --- a/fs/btrfs/props.h +++ b/fs/btrfs/props.h @@ -12,6 +12,7 @@ void __init btrfs_props_init(void); int btrfs_set_prop_trans(struct inode *inode, const char *name, const char *value, size_t value_len, int flags); +int btrfs_validate_prop(const char *name, const char *value, size_t value_len); int btrfs_load_inode_props(struct inode *inode, struct btrfs_path *path); diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c index cb45c02cdc44..09db8f5f08fe 100644 --- a/fs/btrfs/xattr.c +++ b/fs/btrfs/xattr.c @@ -371,7 +371,12 @@ static int btrfs_xattr_handler_set_prop(const struct xattr_handler *handler, const char *name, const void *value, size_t size, int flags) { + int ret; + name = xattr_full_name(handler, name); + ret = btrfs_validate_prop(name, value, size); + if (ret) + return ret; return btrfs_set_prop_trans(inode, name, value, size, flags); } |