diff options
| author | Yan | 2008-01-14 19:26:08 +0100 |
|---|---|---|
| committer | Chris Mason | 2008-09-25 17:03:59 +0200 |
| commit | fdebe2bd70047e057827cba85ba31b2545e31900 (patch) | |
| tree | 7daee1b3fc0060d4ae84925a6f8358b4ff95d7b4 /fs/btrfs/inode.c | |
| parent | Btrfs: Implement ACLs setting and getting (diff) | |
| download | kernel-qcow2-linux-fdebe2bd70047e057827cba85ba31b2545e31900.tar.gz kernel-qcow2-linux-fdebe2bd70047e057827cba85ba31b2545e31900.tar.xz kernel-qcow2-linux-fdebe2bd70047e057827cba85ba31b2545e31900.zip | |
Btrfs: Add readonly inode flag
This patch adds readonly inode flag support. A file with this flag
can't be modified, but can be deleted.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/inode.c')
| -rw-r--r-- | fs/btrfs/inode.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index fba0478a95f4..fd0e0d80333b 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -2850,6 +2850,13 @@ out_fail: btrfs_throttle(root); return err; } +static int btrfs_permission(struct inode *inode, int mask, + struct nameidata *nd) +{ + if (btrfs_test_flag(inode, READONLY) && (mask & MAY_WRITE)) + return -EACCES; + return generic_permission(inode, mask, NULL); +} static struct inode_operations btrfs_dir_inode_operations = { .lookup = btrfs_lookup, @@ -2866,12 +2873,12 @@ static struct inode_operations btrfs_dir_inode_operations = { .getxattr = generic_getxattr, .listxattr = btrfs_listxattr, .removexattr = generic_removexattr, + .permission = btrfs_permission, }; - static struct inode_operations btrfs_dir_ro_inode_operations = { .lookup = btrfs_lookup, + .permission = btrfs_permission, }; - static struct file_operations btrfs_dir_file_operations = { .llseek = generic_file_llseek, .read = generic_read_dir, @@ -2916,15 +2923,16 @@ static struct inode_operations btrfs_file_inode_operations = { .getxattr = generic_getxattr, .listxattr = btrfs_listxattr, .removexattr = generic_removexattr, + .permission = btrfs_permission, }; - static struct inode_operations btrfs_special_inode_operations = { .getattr = btrfs_getattr, .setattr = btrfs_setattr, + .permission = btrfs_permission, }; - static struct inode_operations btrfs_symlink_inode_operations = { .readlink = generic_readlink, .follow_link = page_follow_link_light, .put_link = page_put_link, + .permission = btrfs_permission, }; |