Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/hfsplus/ioctl.c |
| 3 | * |
| 4 | * Copyright (C) 2003 |
| 5 | * Ethan Benson <erbenson@alaska.net> |
| 6 | * partially derived from linux/fs/ext2/ioctl.c |
| 7 | * Copyright (C) 1993, 1994, 1995 |
| 8 | * Remy Card (card@masi.ibp.fr) |
| 9 | * Laboratoire MASI - Institut Blaise Pascal |
| 10 | * Universite Pierre et Marie Curie (Paris VI) |
| 11 | * |
| 12 | * hfsplus ioctls |
| 13 | */ |
| 14 | |
Randy Dunlap | 16f7e0f | 2006-01-11 12:17:46 -0800 | [diff] [blame] | 15 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/fs.h> |
| 17 | #include <linux/sched.h> |
| 18 | #include <linux/xattr.h> |
| 19 | #include <asm/uaccess.h> |
| 20 | #include "hfsplus_fs.h" |
| 21 | |
| 22 | int hfsplus_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, |
| 23 | unsigned long arg) |
| 24 | { |
| 25 | unsigned int flags; |
| 26 | |
| 27 | switch (cmd) { |
| 28 | case HFSPLUS_IOC_EXT2_GETFLAGS: |
| 29 | flags = 0; |
| 30 | if (HFSPLUS_I(inode).rootflags & HFSPLUS_FLG_IMMUTABLE) |
David Howells | 3669567 | 2006-08-29 19:06:16 +0100 | [diff] [blame^] | 31 | flags |= FS_IMMUTABLE_FL; /* EXT2_IMMUTABLE_FL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | if (HFSPLUS_I(inode).rootflags & HFSPLUS_FLG_APPEND) |
David Howells | 3669567 | 2006-08-29 19:06:16 +0100 | [diff] [blame^] | 33 | flags |= FS_APPEND_FL; /* EXT2_APPEND_FL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | if (HFSPLUS_I(inode).userflags & HFSPLUS_FLG_NODUMP) |
David Howells | 3669567 | 2006-08-29 19:06:16 +0100 | [diff] [blame^] | 35 | flags |= FS_NODUMP_FL; /* EXT2_NODUMP_FL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | return put_user(flags, (int __user *)arg); |
| 37 | case HFSPLUS_IOC_EXT2_SETFLAGS: { |
| 38 | if (IS_RDONLY(inode)) |
| 39 | return -EROFS; |
| 40 | |
| 41 | if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER)) |
| 42 | return -EACCES; |
| 43 | |
| 44 | if (get_user(flags, (int __user *)arg)) |
| 45 | return -EFAULT; |
| 46 | |
David Howells | 3669567 | 2006-08-29 19:06:16 +0100 | [diff] [blame^] | 47 | if (flags & (FS_IMMUTABLE_FL|FS_APPEND_FL) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | HFSPLUS_I(inode).rootflags & (HFSPLUS_FLG_IMMUTABLE|HFSPLUS_FLG_APPEND)) { |
| 49 | if (!capable(CAP_LINUX_IMMUTABLE)) |
| 50 | return -EPERM; |
| 51 | } |
| 52 | |
| 53 | /* don't silently ignore unsupported ext2 flags */ |
David Howells | 3669567 | 2006-08-29 19:06:16 +0100 | [diff] [blame^] | 54 | if (flags & ~(FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NODUMP_FL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | return -EOPNOTSUPP; |
| 56 | |
David Howells | 3669567 | 2006-08-29 19:06:16 +0100 | [diff] [blame^] | 57 | if (flags & FS_IMMUTABLE_FL) { /* EXT2_IMMUTABLE_FL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | inode->i_flags |= S_IMMUTABLE; |
| 59 | HFSPLUS_I(inode).rootflags |= HFSPLUS_FLG_IMMUTABLE; |
| 60 | } else { |
| 61 | inode->i_flags &= ~S_IMMUTABLE; |
| 62 | HFSPLUS_I(inode).rootflags &= ~HFSPLUS_FLG_IMMUTABLE; |
| 63 | } |
David Howells | 3669567 | 2006-08-29 19:06:16 +0100 | [diff] [blame^] | 64 | if (flags & FS_APPEND_FL) { /* EXT2_APPEND_FL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | inode->i_flags |= S_APPEND; |
| 66 | HFSPLUS_I(inode).rootflags |= HFSPLUS_FLG_APPEND; |
| 67 | } else { |
| 68 | inode->i_flags &= ~S_APPEND; |
| 69 | HFSPLUS_I(inode).rootflags &= ~HFSPLUS_FLG_APPEND; |
| 70 | } |
David Howells | 3669567 | 2006-08-29 19:06:16 +0100 | [diff] [blame^] | 71 | if (flags & FS_NODUMP_FL) /* EXT2_NODUMP_FL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | HFSPLUS_I(inode).userflags |= HFSPLUS_FLG_NODUMP; |
| 73 | else |
| 74 | HFSPLUS_I(inode).userflags &= ~HFSPLUS_FLG_NODUMP; |
| 75 | |
| 76 | inode->i_ctime = CURRENT_TIME_SEC; |
| 77 | mark_inode_dirty(inode); |
| 78 | return 0; |
| 79 | } |
| 80 | default: |
| 81 | return -ENOTTY; |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | int hfsplus_setxattr(struct dentry *dentry, const char *name, |
| 86 | const void *value, size_t size, int flags) |
| 87 | { |
| 88 | struct inode *inode = dentry->d_inode; |
| 89 | struct hfs_find_data fd; |
| 90 | hfsplus_cat_entry entry; |
| 91 | struct hfsplus_cat_file *file; |
| 92 | int res; |
| 93 | |
| 94 | if (!S_ISREG(inode->i_mode) || HFSPLUS_IS_RSRC(inode)) |
| 95 | return -EOPNOTSUPP; |
| 96 | |
| 97 | res = hfs_find_init(HFSPLUS_SB(inode->i_sb).cat_tree, &fd); |
| 98 | if (res) |
| 99 | return res; |
| 100 | res = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); |
| 101 | if (res) |
| 102 | goto out; |
| 103 | hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, |
| 104 | sizeof(struct hfsplus_cat_file)); |
| 105 | file = &entry.file; |
| 106 | |
| 107 | if (!strcmp(name, "hfs.type")) { |
| 108 | if (size == 4) |
| 109 | memcpy(&file->user_info.fdType, value, 4); |
| 110 | else |
| 111 | res = -ERANGE; |
| 112 | } else if (!strcmp(name, "hfs.creator")) { |
| 113 | if (size == 4) |
| 114 | memcpy(&file->user_info.fdCreator, value, 4); |
| 115 | else |
| 116 | res = -ERANGE; |
| 117 | } else |
| 118 | res = -EOPNOTSUPP; |
| 119 | if (!res) |
| 120 | hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, |
| 121 | sizeof(struct hfsplus_cat_file)); |
| 122 | out: |
| 123 | hfs_find_exit(&fd); |
| 124 | return res; |
| 125 | } |
| 126 | |
| 127 | ssize_t hfsplus_getxattr(struct dentry *dentry, const char *name, |
| 128 | void *value, size_t size) |
| 129 | { |
| 130 | struct inode *inode = dentry->d_inode; |
| 131 | struct hfs_find_data fd; |
| 132 | hfsplus_cat_entry entry; |
| 133 | struct hfsplus_cat_file *file; |
| 134 | ssize_t res = 0; |
| 135 | |
| 136 | if (!S_ISREG(inode->i_mode) || HFSPLUS_IS_RSRC(inode)) |
| 137 | return -EOPNOTSUPP; |
| 138 | |
| 139 | if (size) { |
| 140 | res = hfs_find_init(HFSPLUS_SB(inode->i_sb).cat_tree, &fd); |
| 141 | if (res) |
| 142 | return res; |
| 143 | res = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); |
| 144 | if (res) |
| 145 | goto out; |
| 146 | hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, |
| 147 | sizeof(struct hfsplus_cat_file)); |
| 148 | } |
| 149 | file = &entry.file; |
| 150 | |
| 151 | if (!strcmp(name, "hfs.type")) { |
| 152 | if (size >= 4) { |
| 153 | memcpy(value, &file->user_info.fdType, 4); |
| 154 | res = 4; |
| 155 | } else |
| 156 | res = size ? -ERANGE : 4; |
| 157 | } else if (!strcmp(name, "hfs.creator")) { |
| 158 | if (size >= 4) { |
| 159 | memcpy(value, &file->user_info.fdCreator, 4); |
| 160 | res = 4; |
| 161 | } else |
| 162 | res = size ? -ERANGE : 4; |
| 163 | } else |
| 164 | res = -ENODATA; |
| 165 | out: |
| 166 | if (size) |
| 167 | hfs_find_exit(&fd); |
| 168 | return res; |
| 169 | } |
| 170 | |
| 171 | #define HFSPLUS_ATTRLIST_SIZE (sizeof("hfs.creator")+sizeof("hfs.type")) |
| 172 | |
| 173 | ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size) |
| 174 | { |
| 175 | struct inode *inode = dentry->d_inode; |
| 176 | |
| 177 | if (!S_ISREG(inode->i_mode) || HFSPLUS_IS_RSRC(inode)) |
| 178 | return -EOPNOTSUPP; |
| 179 | |
| 180 | if (!buffer || !size) |
| 181 | return HFSPLUS_ATTRLIST_SIZE; |
| 182 | if (size < HFSPLUS_ATTRLIST_SIZE) |
| 183 | return -ERANGE; |
| 184 | strcpy(buffer, "hfs.type"); |
| 185 | strcpy(buffer + sizeof("hfs.type"), "hfs.creator"); |
| 186 | |
| 187 | return HFSPLUS_ATTRLIST_SIZE; |
| 188 | } |