diff options
Diffstat (limited to 'fs/reiserfs/xattr_trusted.c')
-rw-r--r-- | fs/reiserfs/xattr_trusted.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/fs/reiserfs/xattr_trusted.c b/fs/reiserfs/xattr_trusted.c new file mode 100644 index 0000000..4376219 --- /dev/null +++ b/fs/reiserfs/xattr_trusted.c @@ -0,0 +1,81 @@ +#include <linux/reiserfs_fs.h> +#include <linux/errno.h> +#include <linux/fs.h> +#include <linux/pagemap.h> +#include <linux/xattr.h> +#include <linux/reiserfs_xattr.h> +#include <asm/uaccess.h> + +#define XATTR_TRUSTED_PREFIX "trusted." + +static int +trusted_get (struct inode *inode, const char *name, void *buffer, size_t size) +{ + if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX)) + return -EINVAL; + + if (!reiserfs_xattrs (inode->i_sb)) + return -EOPNOTSUPP; + + if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode))) + return -EPERM; + + return reiserfs_xattr_get (inode, name, buffer, size); +} + +static int +trusted_set (struct inode *inode, const char *name, const void *buffer, + size_t size, int flags) +{ + if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX)) + return -EINVAL; + + if (!reiserfs_xattrs (inode->i_sb)) + return -EOPNOTSUPP; + + if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode))) + return -EPERM; + + return reiserfs_xattr_set (inode, name, buffer, size, flags); +} + +static int +trusted_del (struct inode *inode, const char *name) +{ + if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX)) + return -EINVAL; + + if (!reiserfs_xattrs (inode->i_sb)) + return -EOPNOTSUPP; + + if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode))) + return -EPERM; + + return 0; +} + +static int +trusted_list (struct inode *inode, const char *name, int namelen, char *out) +{ + int len = namelen; + + if (!reiserfs_xattrs (inode->i_sb)) + return 0; + + if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode))) + return 0; + + if (out) + memcpy (out, name, len); + + return len; +} + + +struct reiserfs_xattr_handler trusted_handler = { + .prefix = XATTR_TRUSTED_PREFIX, + .get = trusted_get, + .set = trusted_set, + .del = trusted_del, + .list = trusted_list, +}; |