| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/hfs/attr.c |
| 3 | * |
| 4 | * (C) 2003 Ardis Technologies <roman@ardistech.com> |
| 5 | * |
| 6 | * Export hfs data via xattr |
| 7 | */ |
| 8 | |
| 9 | |
| 10 | #include <linux/fs.h> |
| 11 | #include <linux/xattr.h> |
| 12 | |
| 13 | #include "hfs_fs.h" |
| 14 | #include "btree.h" |
| 15 | |
| 16 | int hfs_setxattr(struct dentry *dentry, const char *name, |
| 17 | const void *value, size_t size, int flags) |
| 18 | { |
| 19 | struct inode *inode = dentry->d_inode; |
| 20 | struct hfs_find_data fd; |
| 21 | hfs_cat_rec rec; |
| 22 | struct hfs_cat_file *file; |
| 23 | int res; |
| 24 | |
| 25 | if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode)) |
| 26 | return -EOPNOTSUPP; |
| 27 | |
| 28 | res = hfs_find_init(HFS_SB(inode->i_sb)->cat_tree, &fd); |
| 29 | if (res) |
| 30 | return res; |
| 31 | fd.search_key->cat = HFS_I(inode)->cat_key; |
| 32 | res = hfs_brec_find(&fd); |
| 33 | if (res) |
| 34 | goto out; |
| 35 | hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, |
| 36 | sizeof(struct hfs_cat_file)); |
| 37 | file = &rec.file; |
| 38 | |
| 39 | if (!strcmp(name, "hfs.type")) { |
| 40 | if (size == 4) |
| 41 | memcpy(&file->UsrWds.fdType, value, 4); |
| 42 | else |
| 43 | res = -ERANGE; |
| 44 | } else if (!strcmp(name, "hfs.creator")) { |
| 45 | if (size == 4) |
| 46 | memcpy(&file->UsrWds.fdCreator, value, 4); |
| 47 | else |
| 48 | res = -ERANGE; |
| 49 | } else |
| 50 | res = -EOPNOTSUPP; |
| 51 | if (!res) |
| 52 | hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, |
| 53 | sizeof(struct hfs_cat_file)); |
| 54 | out: |
| 55 | hfs_find_exit(&fd); |
| 56 | return res; |
| 57 | } |
| 58 | |
| 59 | ssize_t hfs_getxattr(struct dentry *dentry, const char *name, |
| 60 | void *value, size_t size) |
| 61 | { |
| 62 | struct inode *inode = dentry->d_inode; |
| 63 | struct hfs_find_data fd; |
| 64 | hfs_cat_rec rec; |
| 65 | struct hfs_cat_file *file; |
| 66 | ssize_t res = 0; |
| 67 | |
| 68 | if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode)) |
| 69 | return -EOPNOTSUPP; |
| 70 | |
| 71 | if (size) { |
| 72 | res = hfs_find_init(HFS_SB(inode->i_sb)->cat_tree, &fd); |
| 73 | if (res) |
| 74 | return res; |
| 75 | fd.search_key->cat = HFS_I(inode)->cat_key; |
| 76 | res = hfs_brec_find(&fd); |
| 77 | if (res) |
| 78 | goto out; |
| 79 | hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, |
| 80 | sizeof(struct hfs_cat_file)); |
| 81 | } |
| 82 | file = &rec.file; |
| 83 | |
| 84 | if (!strcmp(name, "hfs.type")) { |
| 85 | if (size >= 4) { |
| 86 | memcpy(value, &file->UsrWds.fdType, 4); |
| 87 | res = 4; |
| 88 | } else |
| 89 | res = size ? -ERANGE : 4; |
| 90 | } else if (!strcmp(name, "hfs.creator")) { |
| 91 | if (size >= 4) { |
| 92 | memcpy(value, &file->UsrWds.fdCreator, 4); |
| 93 | res = 4; |
| 94 | } else |
| 95 | res = size ? -ERANGE : 4; |
| 96 | } else |
| 97 | res = -ENODATA; |
| 98 | out: |
| 99 | if (size) |
| 100 | hfs_find_exit(&fd); |
| 101 | return res; |
| 102 | } |
| 103 | |
| 104 | #define HFS_ATTRLIST_SIZE (sizeof("hfs.creator")+sizeof("hfs.type")) |
| 105 | |
| 106 | ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size) |
| 107 | { |
| 108 | struct inode *inode = dentry->d_inode; |
| 109 | |
| 110 | if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode)) |
| 111 | return -EOPNOTSUPP; |
| 112 | |
| 113 | if (!buffer || !size) |
| 114 | return HFS_ATTRLIST_SIZE; |
| 115 | if (size < HFS_ATTRLIST_SIZE) |
| 116 | return -ERANGE; |
| 117 | strcpy(buffer, "hfs.type"); |
| 118 | strcpy(buffer + sizeof("hfs.type"), "hfs.creator"); |
| 119 | |
| 120 | return HFS_ATTRLIST_SIZE; |
| 121 | } |