| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #include <linux/reiserfs_fs.h> |
| 2 | #include <linux/errno.h> |
| 3 | #include <linux/fs.h> |
| 4 | #include <linux/pagemap.h> |
| 5 | #include <linux/xattr.h> |
| 6 | #include <linux/reiserfs_xattr.h> |
| 7 | #include <asm/uaccess.h> |
| 8 | |
| 9 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL |
| 10 | # include <linux/reiserfs_acl.h> |
| 11 | #endif |
| 12 | |
| 13 | #define XATTR_USER_PREFIX "user." |
| 14 | |
| 15 | static int |
| 16 | user_get (struct inode *inode, const char *name, void *buffer, size_t size) |
| 17 | { |
| 18 | |
| 19 | int error; |
| 20 | |
| 21 | if (strlen(name) < sizeof(XATTR_USER_PREFIX)) |
| 22 | return -EINVAL; |
| 23 | |
| 24 | if (!reiserfs_xattrs_user (inode->i_sb)) |
| 25 | return -EOPNOTSUPP; |
| 26 | |
| 27 | error = reiserfs_permission_locked (inode, MAY_READ, NULL); |
| 28 | if (error) |
| 29 | return error; |
| 30 | |
| 31 | return reiserfs_xattr_get (inode, name, buffer, size); |
| 32 | } |
| 33 | |
| 34 | static int |
| 35 | user_set (struct inode *inode, const char *name, const void *buffer, |
| 36 | size_t size, int flags) |
| 37 | { |
| 38 | |
| 39 | int error; |
| 40 | |
| 41 | if (strlen(name) < sizeof(XATTR_USER_PREFIX)) |
| 42 | return -EINVAL; |
| 43 | |
| 44 | if (!reiserfs_xattrs_user (inode->i_sb)) |
| 45 | return -EOPNOTSUPP; |
| 46 | |
| 47 | if (!S_ISREG (inode->i_mode) && |
| 48 | (!S_ISDIR (inode->i_mode) || inode->i_mode & S_ISVTX)) |
| 49 | return -EPERM; |
| 50 | |
| 51 | error = reiserfs_permission_locked (inode, MAY_WRITE, NULL); |
| 52 | if (error) |
| 53 | return error; |
| 54 | |
| 55 | return reiserfs_xattr_set (inode, name, buffer, size, flags); |
| 56 | } |
| 57 | |
| 58 | static int |
| 59 | user_del (struct inode *inode, const char *name) |
| 60 | { |
| 61 | int error; |
| 62 | |
| 63 | if (strlen(name) < sizeof(XATTR_USER_PREFIX)) |
| 64 | return -EINVAL; |
| 65 | |
| 66 | if (!reiserfs_xattrs_user (inode->i_sb)) |
| 67 | return -EOPNOTSUPP; |
| 68 | |
| 69 | if (!S_ISREG (inode->i_mode) && |
| 70 | (!S_ISDIR (inode->i_mode) || inode->i_mode & S_ISVTX)) |
| 71 | return -EPERM; |
| 72 | |
| 73 | error = reiserfs_permission_locked (inode, MAY_WRITE, NULL); |
| 74 | if (error) |
| 75 | return error; |
| 76 | |
| 77 | return 0; |
| 78 | } |
| 79 | |
| 80 | static int |
| 81 | user_list (struct inode *inode, const char *name, int namelen, char *out) |
| 82 | { |
| 83 | int len = namelen; |
| 84 | if (!reiserfs_xattrs_user (inode->i_sb)) |
| 85 | return 0; |
| 86 | |
| 87 | if (out) |
| 88 | memcpy (out, name, len); |
| 89 | |
| 90 | return len; |
| 91 | } |
| 92 | |
| 93 | struct reiserfs_xattr_handler user_handler = { |
| 94 | .prefix = XATTR_USER_PREFIX, |
| 95 | .get = user_get, |
| 96 | .set = user_set, |
| 97 | .del = user_del, |
| 98 | .list = user_list, |
| 99 | }; |