Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README |
| 3 | * |
| 4 | * Trivial changes by Alan Cox to add the LFS fixes |
| 5 | * |
| 6 | * Trivial Changes: |
| 7 | * Rights granted to Hans Reiser to redistribute under other terms providing |
| 8 | * he accepts all liability including but not limited to patent, fitness |
| 9 | * for purpose, and direct or indirect claims arising from failure to perform. |
| 10 | * |
| 11 | * NO WARRANTY |
| 12 | */ |
| 13 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/module.h> |
| 15 | #include <linux/vmalloc.h> |
| 16 | #include <linux/time.h> |
| 17 | #include <asm/uaccess.h> |
| 18 | #include <linux/reiserfs_fs.h> |
| 19 | #include <linux/reiserfs_acl.h> |
| 20 | #include <linux/reiserfs_xattr.h> |
| 21 | #include <linux/smp_lock.h> |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/blkdev.h> |
| 24 | #include <linux/buffer_head.h> |
| 25 | #include <linux/vfs.h> |
| 26 | #include <linux/namespace.h> |
| 27 | #include <linux/mount.h> |
| 28 | #include <linux/namei.h> |
| 29 | #include <linux/quotaops.h> |
| 30 | |
| 31 | struct file_system_type reiserfs_fs_type; |
| 32 | |
| 33 | static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING; |
| 34 | static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING; |
| 35 | static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING; |
| 36 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 37 | int is_reiserfs_3_5(struct reiserfs_super_block *rs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 39 | return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string, |
| 40 | strlen(reiserfs_3_5_magic_string)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | } |
| 42 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 43 | int is_reiserfs_3_6(struct reiserfs_super_block *rs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 45 | return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string, |
| 46 | strlen(reiserfs_3_6_magic_string)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | } |
| 48 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 49 | int is_reiserfs_jr(struct reiserfs_super_block *rs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 51 | return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string, |
| 52 | strlen(reiserfs_jr_magic_string)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | } |
| 54 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 55 | static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 57 | return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) || |
| 58 | is_reiserfs_jr(rs)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | } |
| 60 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 61 | static int reiserfs_remount(struct super_block *s, int *flags, char *data); |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 62 | static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 64 | static int reiserfs_sync_fs(struct super_block *s, int wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 66 | if (!(s->s_flags & MS_RDONLY)) { |
| 67 | struct reiserfs_transaction_handle th; |
| 68 | reiserfs_write_lock(s); |
| 69 | if (!journal_begin(&th, s, 1)) |
| 70 | if (!journal_end_sync(&th, s, 1)) |
| 71 | reiserfs_flush_old_commits(s); |
| 72 | s->s_dirt = 0; /* Even if it's not true. |
| 73 | * We'll loop forever in sync_supers otherwise */ |
| 74 | reiserfs_write_unlock(s); |
| 75 | } else { |
| 76 | s->s_dirt = 0; |
| 77 | } |
| 78 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | } |
| 80 | |
| 81 | static void reiserfs_write_super(struct super_block *s) |
| 82 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 83 | reiserfs_sync_fs(s, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | } |
| 85 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 86 | static void reiserfs_write_super_lockfs(struct super_block *s) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 88 | struct reiserfs_transaction_handle th; |
| 89 | reiserfs_write_lock(s); |
| 90 | if (!(s->s_flags & MS_RDONLY)) { |
| 91 | int err = journal_begin(&th, s, 1); |
| 92 | if (err) { |
| 93 | reiserfs_block_writes(&th); |
| 94 | } else { |
| 95 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), |
| 96 | 1); |
| 97 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); |
| 98 | reiserfs_block_writes(&th); |
| 99 | journal_end_sync(&th, s, 1); |
| 100 | } |
| 101 | } |
| 102 | s->s_dirt = 0; |
| 103 | reiserfs_write_unlock(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | } |
| 105 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 106 | static void reiserfs_unlockfs(struct super_block *s) |
| 107 | { |
| 108 | reiserfs_allow_writes(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | } |
| 110 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 111 | extern const struct in_core_key MAX_IN_CORE_KEY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | |
| 113 | /* this is used to delete "save link" when there are no items of a |
| 114 | file it points to. It can either happen if unlink is completed but |
| 115 | "save unlink" removal, or if file has both unlink and truncate |
| 116 | pending and as unlink completes first (because key of "save link" |
| 117 | protecting unlink is bigger that a key lf "save link" which |
| 118 | protects truncate), so there left no items to make truncate |
| 119 | completion on */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 120 | static int remove_save_link_only(struct super_block *s, |
| 121 | struct reiserfs_key *key, int oid_free) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 123 | struct reiserfs_transaction_handle th; |
| 124 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 126 | /* we are going to do one balancing */ |
| 127 | err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT); |
| 128 | if (err) |
| 129 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 131 | reiserfs_delete_solid_item(&th, NULL, key); |
| 132 | if (oid_free) |
| 133 | /* removals are protected by direct items */ |
| 134 | reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid)); |
| 135 | |
| 136 | return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | #ifdef CONFIG_QUOTA |
| 140 | static int reiserfs_quota_on_mount(struct super_block *, int); |
| 141 | #endif |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 142 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | /* look for uncompleted unlinks and truncates and complete them */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 144 | static int finish_unfinished(struct super_block *s) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 146 | INITIALIZE_PATH(path); |
| 147 | struct cpu_key max_cpu_key, obj_key; |
| 148 | struct reiserfs_key save_link_key; |
| 149 | int retval = 0; |
| 150 | struct item_head *ih; |
| 151 | struct buffer_head *bh; |
| 152 | int item_pos; |
| 153 | char *item; |
| 154 | int done; |
| 155 | struct inode *inode; |
| 156 | int truncate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | #ifdef CONFIG_QUOTA |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 158 | int i; |
| 159 | int ms_active_set; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | #endif |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 161 | |
| 162 | /* compose key to look for "save" links */ |
| 163 | max_cpu_key.version = KEY_FORMAT_3_5; |
| 164 | max_cpu_key.on_disk_key.k_dir_id = ~0U; |
| 165 | max_cpu_key.on_disk_key.k_objectid = ~0U; |
| 166 | set_cpu_key_k_offset(&max_cpu_key, ~0U); |
| 167 | max_cpu_key.key_length = 3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | |
| 169 | #ifdef CONFIG_QUOTA |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 170 | /* Needed for iput() to work correctly and not trash data */ |
| 171 | if (s->s_flags & MS_ACTIVE) { |
| 172 | ms_active_set = 0; |
| 173 | } else { |
| 174 | ms_active_set = 1; |
| 175 | s->s_flags |= MS_ACTIVE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 177 | /* Turn on quotas so that they are updated correctly */ |
| 178 | for (i = 0; i < MAXQUOTAS; i++) { |
| 179 | if (REISERFS_SB(s)->s_qf_names[i]) { |
| 180 | int ret = reiserfs_quota_on_mount(s, i); |
| 181 | if (ret < 0) |
| 182 | reiserfs_warning(s, |
| 183 | "reiserfs: cannot turn on journalled quota: error %d", |
| 184 | ret); |
| 185 | } |
| 186 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 189 | done = 0; |
| 190 | REISERFS_SB(s)->s_is_unlinked_ok = 1; |
| 191 | while (!retval) { |
| 192 | retval = search_item(s, &max_cpu_key, &path); |
| 193 | if (retval != ITEM_NOT_FOUND) { |
| 194 | reiserfs_warning(s, |
| 195 | "vs-2140: finish_unfinished: search_by_key returned %d", |
| 196 | retval); |
| 197 | break; |
| 198 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 200 | bh = get_last_bh(&path); |
| 201 | item_pos = get_item_pos(&path); |
| 202 | if (item_pos != B_NR_ITEMS(bh)) { |
| 203 | reiserfs_warning(s, |
| 204 | "vs-2060: finish_unfinished: wrong position found"); |
| 205 | break; |
| 206 | } |
| 207 | item_pos--; |
| 208 | ih = B_N_PITEM_HEAD(bh, item_pos); |
| 209 | |
| 210 | if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID) |
| 211 | /* there are no "save" links anymore */ |
| 212 | break; |
| 213 | |
| 214 | save_link_key = ih->ih_key; |
| 215 | if (is_indirect_le_ih(ih)) |
| 216 | truncate = 1; |
| 217 | else |
| 218 | truncate = 0; |
| 219 | |
| 220 | /* reiserfs_iget needs k_dirid and k_objectid only */ |
| 221 | item = B_I_PITEM(bh, ih); |
| 222 | obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item); |
| 223 | obj_key.on_disk_key.k_objectid = |
| 224 | le32_to_cpu(ih->ih_key.k_objectid); |
| 225 | obj_key.on_disk_key.k_offset = 0; |
| 226 | obj_key.on_disk_key.k_type = 0; |
| 227 | |
| 228 | pathrelse(&path); |
| 229 | |
| 230 | inode = reiserfs_iget(s, &obj_key); |
| 231 | if (!inode) { |
| 232 | /* the unlink almost completed, it just did not manage to remove |
| 233 | "save" link and release objectid */ |
| 234 | reiserfs_warning(s, |
| 235 | "vs-2180: finish_unfinished: iget failed for %K", |
| 236 | &obj_key); |
| 237 | retval = remove_save_link_only(s, &save_link_key, 1); |
| 238 | continue; |
| 239 | } |
| 240 | |
| 241 | if (!truncate && inode->i_nlink) { |
| 242 | /* file is not unlinked */ |
| 243 | reiserfs_warning(s, |
| 244 | "vs-2185: finish_unfinished: file %K is not unlinked", |
| 245 | &obj_key); |
| 246 | retval = remove_save_link_only(s, &save_link_key, 0); |
| 247 | continue; |
| 248 | } |
| 249 | DQUOT_INIT(inode); |
| 250 | |
| 251 | if (truncate && S_ISDIR(inode->i_mode)) { |
| 252 | /* We got a truncate request for a dir which is impossible. |
| 253 | The only imaginable way is to execute unfinished truncate request |
| 254 | then boot into old kernel, remove the file and create dir with |
| 255 | the same key. */ |
| 256 | reiserfs_warning(s, |
| 257 | "green-2101: impossible truncate on a directory %k. Please report", |
| 258 | INODE_PKEY(inode)); |
| 259 | retval = remove_save_link_only(s, &save_link_key, 0); |
| 260 | truncate = 0; |
| 261 | iput(inode); |
| 262 | continue; |
| 263 | } |
| 264 | |
| 265 | if (truncate) { |
| 266 | REISERFS_I(inode)->i_flags |= |
| 267 | i_link_saved_truncate_mask; |
| 268 | /* not completed truncate found. New size was committed together |
| 269 | with "save" link */ |
| 270 | reiserfs_info(s, "Truncating %k to %Ld ..", |
| 271 | INODE_PKEY(inode), inode->i_size); |
| 272 | reiserfs_truncate_file(inode, |
| 273 | 0 |
| 274 | /*don't update modification time */ |
| 275 | ); |
| 276 | retval = remove_save_link(inode, truncate); |
| 277 | } else { |
| 278 | REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; |
| 279 | /* not completed unlink (rmdir) found */ |
| 280 | reiserfs_info(s, "Removing %k..", INODE_PKEY(inode)); |
| 281 | /* removal gets completed in iput */ |
| 282 | retval = 0; |
| 283 | } |
| 284 | |
| 285 | iput(inode); |
| 286 | printk("done\n"); |
| 287 | done++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 289 | REISERFS_SB(s)->s_is_unlinked_ok = 0; |
| 290 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | #ifdef CONFIG_QUOTA |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 292 | /* Turn quotas off */ |
| 293 | for (i = 0; i < MAXQUOTAS; i++) { |
| 294 | if (sb_dqopt(s)->files[i]) |
| 295 | vfs_quota_off_mount(s, i); |
| 296 | } |
| 297 | if (ms_active_set) |
| 298 | /* Restore the flag back */ |
| 299 | s->s_flags &= ~MS_ACTIVE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | #endif |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 301 | pathrelse(&path); |
| 302 | if (done) |
| 303 | reiserfs_info(s, "There were %d uncompleted unlinks/truncates. " |
| 304 | "Completed\n", done); |
| 305 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 307 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | /* to protect file being unlinked from getting lost we "safe" link files |
| 309 | being unlinked. This link will be deleted in the same transaction with last |
| 310 | item of file. mounting the filesytem we scan all these links and remove |
| 311 | files which almost got lost */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 312 | void add_save_link(struct reiserfs_transaction_handle *th, |
| 313 | struct inode *inode, int truncate) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 315 | INITIALIZE_PATH(path); |
| 316 | int retval; |
| 317 | struct cpu_key key; |
| 318 | struct item_head ih; |
| 319 | __le32 link; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 321 | BUG_ON(!th->t_trans_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 323 | /* file can only get one "save link" of each kind */ |
| 324 | RFALSE(truncate && |
| 325 | (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask), |
| 326 | "saved link already exists for truncated inode %lx", |
| 327 | (long)inode->i_ino); |
| 328 | RFALSE(!truncate && |
| 329 | (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask), |
| 330 | "saved link already exists for unlinked inode %lx", |
| 331 | (long)inode->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 333 | /* setup key of "save" link */ |
| 334 | key.version = KEY_FORMAT_3_5; |
| 335 | key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID; |
| 336 | key.on_disk_key.k_objectid = inode->i_ino; |
| 337 | if (!truncate) { |
| 338 | /* unlink, rmdir, rename */ |
| 339 | set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize); |
| 340 | set_cpu_key_k_type(&key, TYPE_DIRECT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 342 | /* item head of "safe" link */ |
| 343 | make_le_item_head(&ih, &key, key.version, |
| 344 | 1 + inode->i_sb->s_blocksize, TYPE_DIRECT, |
| 345 | 4 /*length */ , 0xffff /*free space */ ); |
| 346 | } else { |
| 347 | /* truncate */ |
| 348 | if (S_ISDIR(inode->i_mode)) |
| 349 | reiserfs_warning(inode->i_sb, |
| 350 | "green-2102: Adding a truncate savelink for a directory %k! Please report", |
| 351 | INODE_PKEY(inode)); |
| 352 | set_cpu_key_k_offset(&key, 1); |
| 353 | set_cpu_key_k_type(&key, TYPE_INDIRECT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 355 | /* item head of "safe" link */ |
| 356 | make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT, |
| 357 | 4 /*length */ , 0 /*free space */ ); |
| 358 | } |
| 359 | key.key_length = 3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 361 | /* look for its place in the tree */ |
| 362 | retval = search_item(inode->i_sb, &key, &path); |
| 363 | if (retval != ITEM_NOT_FOUND) { |
| 364 | if (retval != -ENOSPC) |
| 365 | reiserfs_warning(inode->i_sb, "vs-2100: add_save_link:" |
| 366 | "search_by_key (%K) returned %d", &key, |
| 367 | retval); |
| 368 | pathrelse(&path); |
| 369 | return; |
| 370 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 372 | /* body of "save" link */ |
| 373 | link = INODE_PKEY(inode)->k_dir_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 375 | /* put "save" link inot tree, don't charge quota to anyone */ |
| 376 | retval = |
| 377 | reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link); |
| 378 | if (retval) { |
| 379 | if (retval != -ENOSPC) |
| 380 | reiserfs_warning(inode->i_sb, |
| 381 | "vs-2120: add_save_link: insert_item returned %d", |
| 382 | retval); |
| 383 | } else { |
| 384 | if (truncate) |
| 385 | REISERFS_I(inode)->i_flags |= |
| 386 | i_link_saved_truncate_mask; |
| 387 | else |
| 388 | REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; |
| 389 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | } |
| 391 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | /* this opens transaction unlike add_save_link */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 393 | int remove_save_link(struct inode *inode, int truncate) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 395 | struct reiserfs_transaction_handle th; |
| 396 | struct reiserfs_key key; |
| 397 | int err; |
| 398 | |
| 399 | /* we are going to do one balancing only */ |
| 400 | err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); |
| 401 | if (err) |
| 402 | return err; |
| 403 | |
| 404 | /* setup key of "save" link */ |
| 405 | key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID); |
| 406 | key.k_objectid = INODE_PKEY(inode)->k_objectid; |
| 407 | if (!truncate) { |
| 408 | /* unlink, rmdir, rename */ |
| 409 | set_le_key_k_offset(KEY_FORMAT_3_5, &key, |
| 410 | 1 + inode->i_sb->s_blocksize); |
| 411 | set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT); |
| 412 | } else { |
| 413 | /* truncate */ |
| 414 | set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1); |
| 415 | set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT); |
| 416 | } |
| 417 | |
| 418 | if ((truncate && |
| 419 | (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) || |
| 420 | (!truncate && |
| 421 | (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask))) |
| 422 | /* don't take quota bytes from anywhere */ |
| 423 | reiserfs_delete_solid_item(&th, NULL, &key); |
| 424 | if (!truncate) { |
| 425 | reiserfs_release_objectid(&th, inode->i_ino); |
| 426 | REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask; |
| 427 | } else |
| 428 | REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask; |
| 429 | |
| 430 | return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | } |
| 432 | |
David Howells | edc666e | 2006-10-11 01:22:14 -0700 | [diff] [blame] | 433 | static void reiserfs_kill_sb(struct super_block *s) |
| 434 | { |
| 435 | if (REISERFS_SB(s)) { |
| 436 | if (REISERFS_SB(s)->xattr_root) { |
| 437 | d_invalidate(REISERFS_SB(s)->xattr_root); |
| 438 | dput(REISERFS_SB(s)->xattr_root); |
| 439 | REISERFS_SB(s)->xattr_root = NULL; |
| 440 | } |
| 441 | |
| 442 | if (REISERFS_SB(s)->priv_root) { |
| 443 | d_invalidate(REISERFS_SB(s)->priv_root); |
| 444 | dput(REISERFS_SB(s)->priv_root); |
| 445 | REISERFS_SB(s)->priv_root = NULL; |
| 446 | } |
| 447 | } |
| 448 | |
| 449 | kill_block_super(s); |
| 450 | } |
| 451 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 452 | static void reiserfs_put_super(struct super_block *s) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 454 | struct reiserfs_transaction_handle th; |
| 455 | th.t_trans_id = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 457 | /* change file system state to current state if it was mounted with read-write permissions */ |
| 458 | if (!(s->s_flags & MS_RDONLY)) { |
| 459 | if (!journal_begin(&th, s, 10)) { |
| 460 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), |
| 461 | 1); |
| 462 | set_sb_umount_state(SB_DISK_SUPER_BLOCK(s), |
| 463 | REISERFS_SB(s)->s_mount_state); |
| 464 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); |
| 465 | } |
| 466 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 468 | /* note, journal_release checks for readonly mount, and can decide not |
| 469 | ** to do a journal_end |
| 470 | */ |
| 471 | journal_release(&th, s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | |
Jeff Mahoney | 5065227 | 2006-09-30 23:28:44 -0700 | [diff] [blame] | 473 | reiserfs_free_bitmap_cache(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 475 | brelse(SB_BUFFER_WITH_SB(s)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 477 | print_statistics(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 479 | if (REISERFS_SB(s)->reserved_blocks != 0) { |
| 480 | reiserfs_warning(s, |
| 481 | "green-2005: reiserfs_put_super: reserved blocks left %d", |
| 482 | REISERFS_SB(s)->reserved_blocks); |
| 483 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 485 | reiserfs_proc_info_done(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 487 | kfree(s->s_fs_info); |
| 488 | s->s_fs_info = NULL; |
| 489 | |
| 490 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | } |
| 492 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 493 | static kmem_cache_t *reiserfs_inode_cachep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | |
| 495 | static struct inode *reiserfs_alloc_inode(struct super_block *sb) |
| 496 | { |
| 497 | struct reiserfs_inode_info *ei; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 498 | ei = (struct reiserfs_inode_info *) |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame^] | 499 | kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | if (!ei) |
| 501 | return NULL; |
| 502 | return &ei->vfs_inode; |
| 503 | } |
| 504 | |
| 505 | static void reiserfs_destroy_inode(struct inode *inode) |
| 506 | { |
| 507 | kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode)); |
| 508 | } |
| 509 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 510 | static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 512 | struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 514 | if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) == |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | SLAB_CTOR_CONSTRUCTOR) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 516 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | inode_init_once(&ei->vfs_inode); |
Alexey Dobriyan | cfe1467 | 2006-09-29 02:00:00 -0700 | [diff] [blame] | 518 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | ei->i_acl_access = NULL; |
| 520 | ei->i_acl_default = NULL; |
Alexey Dobriyan | cfe1467 | 2006-09-29 02:00:00 -0700 | [diff] [blame] | 521 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | } |
| 523 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 524 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | static int init_inodecache(void) |
| 526 | { |
| 527 | reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache", |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 528 | sizeof(struct |
| 529 | reiserfs_inode_info), |
Paul Jackson | fffb60f | 2006-03-24 03:16:06 -0800 | [diff] [blame] | 530 | 0, (SLAB_RECLAIM_ACCOUNT| |
| 531 | SLAB_MEM_SPREAD), |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 532 | init_once, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | if (reiserfs_inode_cachep == NULL) |
| 534 | return -ENOMEM; |
| 535 | return 0; |
| 536 | } |
| 537 | |
| 538 | static void destroy_inodecache(void) |
| 539 | { |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 540 | kmem_cache_destroy(reiserfs_inode_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | } |
| 542 | |
| 543 | /* we don't mark inodes dirty, we just log them */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 544 | static void reiserfs_dirty_inode(struct inode *inode) |
| 545 | { |
| 546 | struct reiserfs_transaction_handle th; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 548 | int err = 0; |
| 549 | if (inode->i_sb->s_flags & MS_RDONLY) { |
| 550 | reiserfs_warning(inode->i_sb, |
| 551 | "clm-6006: writing inode %lu on readonly FS", |
| 552 | inode->i_ino); |
| 553 | return; |
| 554 | } |
| 555 | reiserfs_write_lock(inode->i_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 557 | /* this is really only used for atime updates, so they don't have |
| 558 | ** to be included in O_SYNC or fsync |
| 559 | */ |
| 560 | err = journal_begin(&th, inode->i_sb, 1); |
| 561 | if (err) { |
| 562 | reiserfs_write_unlock(inode->i_sb); |
| 563 | return; |
| 564 | } |
| 565 | reiserfs_update_sd(&th, inode); |
| 566 | journal_end(&th, inode->i_sb, 1); |
| 567 | reiserfs_write_unlock(inode->i_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | } |
| 569 | |
Alexey Dobriyan | cfe1467 | 2006-09-29 02:00:00 -0700 | [diff] [blame] | 570 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 571 | static void reiserfs_clear_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 573 | struct posix_acl *acl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 575 | acl = REISERFS_I(inode)->i_acl_access; |
| 576 | if (acl && !IS_ERR(acl)) |
| 577 | posix_acl_release(acl); |
| 578 | REISERFS_I(inode)->i_acl_access = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 580 | acl = REISERFS_I(inode)->i_acl_default; |
| 581 | if (acl && !IS_ERR(acl)) |
| 582 | posix_acl_release(acl); |
| 583 | REISERFS_I(inode)->i_acl_default = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | } |
Alexey Dobriyan | cfe1467 | 2006-09-29 02:00:00 -0700 | [diff] [blame] | 585 | #else |
| 586 | #define reiserfs_clear_inode NULL |
| 587 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | |
| 589 | #ifdef CONFIG_QUOTA |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 590 | static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, |
| 591 | size_t, loff_t); |
| 592 | static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, |
| 593 | loff_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | #endif |
| 595 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 596 | static struct super_operations reiserfs_sops = { |
| 597 | .alloc_inode = reiserfs_alloc_inode, |
| 598 | .destroy_inode = reiserfs_destroy_inode, |
| 599 | .write_inode = reiserfs_write_inode, |
| 600 | .dirty_inode = reiserfs_dirty_inode, |
| 601 | .delete_inode = reiserfs_delete_inode, |
| 602 | .clear_inode = reiserfs_clear_inode, |
| 603 | .put_super = reiserfs_put_super, |
| 604 | .write_super = reiserfs_write_super, |
| 605 | .sync_fs = reiserfs_sync_fs, |
| 606 | .write_super_lockfs = reiserfs_write_super_lockfs, |
| 607 | .unlockfs = reiserfs_unlockfs, |
| 608 | .statfs = reiserfs_statfs, |
| 609 | .remount_fs = reiserfs_remount, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | #ifdef CONFIG_QUOTA |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 611 | .quota_read = reiserfs_quota_read, |
| 612 | .quota_write = reiserfs_quota_write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | #endif |
| 614 | }; |
| 615 | |
| 616 | #ifdef CONFIG_QUOTA |
| 617 | #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") |
| 618 | |
| 619 | static int reiserfs_dquot_initialize(struct inode *, int); |
| 620 | static int reiserfs_dquot_drop(struct inode *); |
| 621 | static int reiserfs_write_dquot(struct dquot *); |
| 622 | static int reiserfs_acquire_dquot(struct dquot *); |
| 623 | static int reiserfs_release_dquot(struct dquot *); |
| 624 | static int reiserfs_mark_dquot_dirty(struct dquot *); |
| 625 | static int reiserfs_write_info(struct super_block *, int); |
| 626 | static int reiserfs_quota_on(struct super_block *, int, int, char *); |
| 627 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 628 | static struct dquot_operations reiserfs_quota_operations = { |
| 629 | .initialize = reiserfs_dquot_initialize, |
| 630 | .drop = reiserfs_dquot_drop, |
| 631 | .alloc_space = dquot_alloc_space, |
| 632 | .alloc_inode = dquot_alloc_inode, |
| 633 | .free_space = dquot_free_space, |
| 634 | .free_inode = dquot_free_inode, |
| 635 | .transfer = dquot_transfer, |
| 636 | .write_dquot = reiserfs_write_dquot, |
| 637 | .acquire_dquot = reiserfs_acquire_dquot, |
| 638 | .release_dquot = reiserfs_release_dquot, |
| 639 | .mark_dirty = reiserfs_mark_dquot_dirty, |
| 640 | .write_info = reiserfs_write_info, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | }; |
| 642 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 643 | static struct quotactl_ops reiserfs_qctl_operations = { |
| 644 | .quota_on = reiserfs_quota_on, |
| 645 | .quota_off = vfs_quota_off, |
| 646 | .quota_sync = vfs_quota_sync, |
| 647 | .get_info = vfs_get_dqinfo, |
| 648 | .set_info = vfs_set_dqinfo, |
| 649 | .get_dqblk = vfs_get_dqblk, |
| 650 | .set_dqblk = vfs_set_dqblk, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | }; |
| 652 | #endif |
| 653 | |
| 654 | static struct export_operations reiserfs_export_ops = { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 655 | .encode_fh = reiserfs_encode_fh, |
| 656 | .decode_fh = reiserfs_decode_fh, |
| 657 | .get_parent = reiserfs_get_parent, |
| 658 | .get_dentry = reiserfs_get_dentry, |
| 659 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | |
| 661 | /* this struct is used in reiserfs_getopt () for containing the value for those |
| 662 | mount options that have values rather than being toggles. */ |
| 663 | typedef struct { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 664 | char *value; |
| 665 | int setmask; /* bitmask which is to set on mount_options bitmask when this |
| 666 | value is found, 0 is no bits are to be changed. */ |
| 667 | int clrmask; /* bitmask which is to clear on mount_options bitmask when this |
| 668 | value is found, 0 is no bits are to be changed. This is |
| 669 | applied BEFORE setmask */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | } arg_desc_t; |
| 671 | |
| 672 | /* Set this bit in arg_required to allow empty arguments */ |
| 673 | #define REISERFS_OPT_ALLOWEMPTY 31 |
| 674 | |
| 675 | /* this struct is used in reiserfs_getopt() for describing the set of reiserfs |
| 676 | mount options */ |
| 677 | typedef struct { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 678 | char *option_name; |
| 679 | int arg_required; /* 0 if argument is not required, not 0 otherwise */ |
| 680 | const arg_desc_t *values; /* list of values accepted by an option */ |
| 681 | int setmask; /* bitmask which is to set on mount_options bitmask when this |
| 682 | value is found, 0 is no bits are to be changed. */ |
| 683 | int clrmask; /* bitmask which is to clear on mount_options bitmask when this |
| 684 | value is found, 0 is no bits are to be changed. This is |
| 685 | applied BEFORE setmask */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | } opt_desc_t; |
| 687 | |
| 688 | /* possible values for -o data= */ |
| 689 | static const arg_desc_t logging_mode[] = { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 690 | {"ordered", 1 << REISERFS_DATA_ORDERED, |
| 691 | (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)}, |
| 692 | {"journal", 1 << REISERFS_DATA_LOG, |
| 693 | (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)}, |
| 694 | {"writeback", 1 << REISERFS_DATA_WRITEBACK, |
| 695 | (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)}, |
Vladimir V. Saveliev | cd02b96 | 2006-03-25 03:07:15 -0800 | [diff] [blame] | 696 | {.value = NULL} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | }; |
| 698 | |
| 699 | /* possible values for -o barrier= */ |
| 700 | static const arg_desc_t barrier_mode[] = { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 701 | {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH}, |
| 702 | {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE}, |
Vladimir V. Saveliev | cd02b96 | 2006-03-25 03:07:15 -0800 | [diff] [blame] | 703 | {.value = NULL} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | }; |
| 705 | |
| 706 | /* possible values for "-o block-allocator=" and bits which are to be set in |
| 707 | s_mount_opt of reiserfs specific part of in-core super block */ |
| 708 | static const arg_desc_t balloc[] = { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 709 | {"noborder", 1 << REISERFS_NO_BORDER, 0}, |
| 710 | {"border", 0, 1 << REISERFS_NO_BORDER}, |
| 711 | {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0}, |
| 712 | {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0}, |
| 713 | {"test4", 1 << REISERFS_TEST4, 0}, |
| 714 | {"notest4", 0, 1 << REISERFS_TEST4}, |
| 715 | {NULL, 0, 0} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | }; |
| 717 | |
| 718 | static const arg_desc_t tails[] = { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 719 | {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL}, |
| 720 | {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, |
| 721 | {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL}, |
| 722 | {NULL, 0, 0} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | }; |
| 724 | |
| 725 | static const arg_desc_t error_actions[] = { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 726 | {"panic", 1 << REISERFS_ERROR_PANIC, |
| 727 | (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)}, |
| 728 | {"ro-remount", 1 << REISERFS_ERROR_RO, |
| 729 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 731 | {"continue", 1 << REISERFS_ERROR_CONTINUE, |
| 732 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | #endif |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 734 | {NULL, 0, 0}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | }; |
| 736 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | /* proceed only one option from a list *cur - string containing of mount options |
| 738 | opts - array of options which are accepted |
| 739 | opt_arg - if option is found and requires an argument and if it is specifed |
| 740 | in the input - pointer to the argument is stored here |
| 741 | bit_flags - if option requires to set a certain bit - it is set here |
| 742 | return -1 if unknown option is found, opt->arg_required otherwise */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 743 | static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts, |
| 744 | char **opt_arg, unsigned long *bit_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 746 | char *p; |
| 747 | /* foo=bar, |
| 748 | ^ ^ ^ |
| 749 | | | +-- option_end |
| 750 | | +-- arg_start |
| 751 | +-- option_start |
| 752 | */ |
| 753 | const opt_desc_t *opt; |
| 754 | const arg_desc_t *arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 756 | p = *cur; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 758 | /* assume argument cannot contain commas */ |
| 759 | *cur = strchr(p, ','); |
| 760 | if (*cur) { |
| 761 | *(*cur) = '\0'; |
| 762 | (*cur)++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 765 | if (!strncmp(p, "alloc=", 6)) { |
| 766 | /* Ugly special case, probably we should redo options parser so that |
| 767 | it can understand several arguments for some options, also so that |
| 768 | it can fill several bitfields with option values. */ |
| 769 | if (reiserfs_parse_alloc_options(s, p + 6)) { |
| 770 | return -1; |
| 771 | } else { |
| 772 | return 0; |
| 773 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 775 | |
| 776 | /* for every option in the list */ |
| 777 | for (opt = opts; opt->option_name; opt++) { |
| 778 | if (!strncmp(p, opt->option_name, strlen(opt->option_name))) { |
| 779 | if (bit_flags) { |
| 780 | if (opt->clrmask == |
| 781 | (1 << REISERFS_UNSUPPORTED_OPT)) |
| 782 | reiserfs_warning(s, "%s not supported.", |
| 783 | p); |
| 784 | else |
| 785 | *bit_flags &= ~opt->clrmask; |
| 786 | if (opt->setmask == |
| 787 | (1 << REISERFS_UNSUPPORTED_OPT)) |
| 788 | reiserfs_warning(s, "%s not supported.", |
| 789 | p); |
| 790 | else |
| 791 | *bit_flags |= opt->setmask; |
| 792 | } |
| 793 | break; |
| 794 | } |
| 795 | } |
| 796 | if (!opt->option_name) { |
| 797 | reiserfs_warning(s, "unknown mount option \"%s\"", p); |
| 798 | return -1; |
| 799 | } |
| 800 | |
| 801 | p += strlen(opt->option_name); |
| 802 | switch (*p) { |
| 803 | case '=': |
| 804 | if (!opt->arg_required) { |
| 805 | reiserfs_warning(s, |
| 806 | "the option \"%s\" does not require an argument", |
| 807 | opt->option_name); |
| 808 | return -1; |
| 809 | } |
| 810 | break; |
| 811 | |
| 812 | case 0: |
| 813 | if (opt->arg_required) { |
| 814 | reiserfs_warning(s, |
| 815 | "the option \"%s\" requires an argument", |
| 816 | opt->option_name); |
| 817 | return -1; |
| 818 | } |
| 819 | break; |
| 820 | default: |
| 821 | reiserfs_warning(s, "head of option \"%s\" is only correct", |
| 822 | opt->option_name); |
| 823 | return -1; |
| 824 | } |
| 825 | |
| 826 | /* move to the argument, or to next option if argument is not required */ |
| 827 | p++; |
| 828 | |
| 829 | if (opt->arg_required |
| 830 | && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY)) |
| 831 | && !strlen(p)) { |
| 832 | /* this catches "option=," if not allowed */ |
| 833 | reiserfs_warning(s, "empty argument for \"%s\"", |
| 834 | opt->option_name); |
| 835 | return -1; |
| 836 | } |
| 837 | |
| 838 | if (!opt->values) { |
| 839 | /* *=NULLopt_arg contains pointer to argument */ |
| 840 | *opt_arg = p; |
| 841 | return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY); |
| 842 | } |
| 843 | |
| 844 | /* values possible for this option are listed in opt->values */ |
| 845 | for (arg = opt->values; arg->value; arg++) { |
| 846 | if (!strcmp(p, arg->value)) { |
| 847 | if (bit_flags) { |
| 848 | *bit_flags &= ~arg->clrmask; |
| 849 | *bit_flags |= arg->setmask; |
| 850 | } |
| 851 | return opt->arg_required; |
| 852 | } |
| 853 | } |
| 854 | |
| 855 | reiserfs_warning(s, "bad value \"%s\" for option \"%s\"", p, |
| 856 | opt->option_name); |
| 857 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | } |
| 859 | |
| 860 | /* returns 0 if something is wrong in option string, 1 - otherwise */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 861 | static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */ |
| 862 | unsigned long *mount_options, |
| 863 | /* after the parsing phase, contains the |
| 864 | collection of bitflags defining what |
| 865 | mount options were selected. */ |
| 866 | unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */ |
| 867 | char **jdev_name, |
| 868 | unsigned int *commit_max_age) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 870 | int c; |
| 871 | char *arg = NULL; |
| 872 | char *pos; |
| 873 | opt_desc_t opts[] = { |
| 874 | /* Compatibility stuff, so that -o notail for old setups still work */ |
| 875 | {"tails",.arg_required = 't',.values = tails}, |
| 876 | {"notail",.clrmask = |
| 877 | (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, |
| 878 | {"conv",.setmask = 1 << REISERFS_CONVERT}, |
| 879 | {"attrs",.setmask = 1 << REISERFS_ATTRS}, |
| 880 | {"noattrs",.clrmask = 1 << REISERFS_ATTRS}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | #ifdef CONFIG_REISERFS_FS_XATTR |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 882 | {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER}, |
| 883 | {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | #else |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 885 | {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
| 886 | {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | #endif |
| 888 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 889 | {"acl",.setmask = 1 << REISERFS_POSIXACL}, |
| 890 | {"noacl",.clrmask = 1 << REISERFS_POSIXACL}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | #else |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 892 | {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
| 893 | {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | #endif |
Vladimir V. Saveliev | cd02b96 | 2006-03-25 03:07:15 -0800 | [diff] [blame] | 895 | {.option_name = "nolog"}, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 896 | {"replayonly",.setmask = 1 << REPLAYONLY}, |
| 897 | {"block-allocator",.arg_required = 'a',.values = balloc}, |
| 898 | {"data",.arg_required = 'd',.values = logging_mode}, |
| 899 | {"barrier",.arg_required = 'b',.values = barrier_mode}, |
| 900 | {"resize",.arg_required = 'r',.values = NULL}, |
| 901 | {"jdev",.arg_required = 'j',.values = NULL}, |
| 902 | {"nolargeio",.arg_required = 'w',.values = NULL}, |
| 903 | {"commit",.arg_required = 'c',.values = NULL}, |
| 904 | {"usrquota",.setmask = 1 << REISERFS_QUOTA}, |
| 905 | {"grpquota",.setmask = 1 << REISERFS_QUOTA}, |
| 906 | {"noquota",.clrmask = 1 << REISERFS_QUOTA}, |
| 907 | {"errors",.arg_required = 'e',.values = error_actions}, |
| 908 | {"usrjquota",.arg_required = |
| 909 | 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, |
| 910 | {"grpjquota",.arg_required = |
| 911 | 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, |
| 912 | {"jqfmt",.arg_required = 'f',.values = NULL}, |
Vladimir V. Saveliev | cd02b96 | 2006-03-25 03:07:15 -0800 | [diff] [blame] | 913 | {.option_name = NULL} |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 914 | }; |
| 915 | |
| 916 | *blocks = 0; |
| 917 | if (!options || !*options) |
| 918 | /* use default configuration: create tails, journaling on, no |
| 919 | conversion to newest format */ |
| 920 | return 1; |
| 921 | |
| 922 | for (pos = options; pos;) { |
| 923 | c = reiserfs_getopt(s, &pos, opts, &arg, mount_options); |
| 924 | if (c == -1) |
| 925 | /* wrong option is given */ |
| 926 | return 0; |
| 927 | |
| 928 | if (c == 'r') { |
| 929 | char *p; |
| 930 | |
| 931 | p = NULL; |
| 932 | /* "resize=NNN" or "resize=auto" */ |
| 933 | |
| 934 | if (!strcmp(arg, "auto")) { |
| 935 | /* From JFS code, to auto-get the size. */ |
| 936 | *blocks = |
| 937 | s->s_bdev->bd_inode->i_size >> s-> |
| 938 | s_blocksize_bits; |
| 939 | } else { |
| 940 | *blocks = simple_strtoul(arg, &p, 0); |
| 941 | if (*p != '\0') { |
| 942 | /* NNN does not look like a number */ |
| 943 | reiserfs_warning(s, |
| 944 | "reiserfs_parse_options: bad value %s", |
| 945 | arg); |
| 946 | return 0; |
| 947 | } |
| 948 | } |
| 949 | } |
| 950 | |
| 951 | if (c == 'c') { |
| 952 | char *p = NULL; |
| 953 | unsigned long val = simple_strtoul(arg, &p, 0); |
| 954 | /* commit=NNN (time in seconds) */ |
| 955 | if (*p != '\0' || val >= (unsigned int)-1) { |
| 956 | reiserfs_warning(s, |
| 957 | "reiserfs_parse_options: bad value %s", |
| 958 | arg); |
| 959 | return 0; |
| 960 | } |
| 961 | *commit_max_age = (unsigned int)val; |
| 962 | } |
| 963 | |
| 964 | if (c == 'w') { |
Adrian Bunk | 36b756f | 2006-09-27 01:50:50 -0700 | [diff] [blame] | 965 | reiserfs_warning(s, "reiserfs: nolargeio option is no longer supported"); |
| 966 | return 0; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 967 | } |
| 968 | |
| 969 | if (c == 'j') { |
| 970 | if (arg && *arg && jdev_name) { |
| 971 | if (*jdev_name) { //Hm, already assigned? |
| 972 | reiserfs_warning(s, |
| 973 | "reiserfs_parse_options: journal device was already specified to be %s", |
| 974 | *jdev_name); |
| 975 | return 0; |
| 976 | } |
| 977 | *jdev_name = arg; |
| 978 | } |
| 979 | } |
| 980 | #ifdef CONFIG_QUOTA |
| 981 | if (c == 'u' || c == 'g') { |
| 982 | int qtype = c == 'u' ? USRQUOTA : GRPQUOTA; |
| 983 | |
| 984 | if (sb_any_quota_enabled(s)) { |
| 985 | reiserfs_warning(s, |
| 986 | "reiserfs_parse_options: cannot change journalled quota options when quota turned on."); |
| 987 | return 0; |
| 988 | } |
| 989 | if (*arg) { /* Some filename specified? */ |
| 990 | if (REISERFS_SB(s)->s_qf_names[qtype] |
| 991 | && strcmp(REISERFS_SB(s)->s_qf_names[qtype], |
| 992 | arg)) { |
| 993 | reiserfs_warning(s, |
| 994 | "reiserfs_parse_options: %s quota file already specified.", |
| 995 | QTYPE2NAME(qtype)); |
| 996 | return 0; |
| 997 | } |
| 998 | if (strchr(arg, '/')) { |
| 999 | reiserfs_warning(s, |
| 1000 | "reiserfs_parse_options: quotafile must be on filesystem root."); |
| 1001 | return 0; |
| 1002 | } |
| 1003 | REISERFS_SB(s)->s_qf_names[qtype] = |
| 1004 | kmalloc(strlen(arg) + 1, GFP_KERNEL); |
| 1005 | if (!REISERFS_SB(s)->s_qf_names[qtype]) { |
| 1006 | reiserfs_warning(s, |
| 1007 | "reiserfs_parse_options: not enough memory for storing quotafile name."); |
| 1008 | return 0; |
| 1009 | } |
| 1010 | strcpy(REISERFS_SB(s)->s_qf_names[qtype], arg); |
| 1011 | *mount_options |= 1 << REISERFS_QUOTA; |
| 1012 | } else { |
James Lamanna | 833d304 | 2005-10-30 15:00:16 -0800 | [diff] [blame] | 1013 | kfree(REISERFS_SB(s)->s_qf_names[qtype]); |
| 1014 | REISERFS_SB(s)->s_qf_names[qtype] = NULL; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1015 | } |
| 1016 | } |
| 1017 | if (c == 'f') { |
| 1018 | if (!strcmp(arg, "vfsold")) |
| 1019 | REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_OLD; |
| 1020 | else if (!strcmp(arg, "vfsv0")) |
| 1021 | REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_V0; |
| 1022 | else { |
| 1023 | reiserfs_warning(s, |
| 1024 | "reiserfs_parse_options: unknown quota format specified."); |
| 1025 | return 0; |
| 1026 | } |
| 1027 | } |
| 1028 | #else |
| 1029 | if (c == 'u' || c == 'g' || c == 'f') { |
| 1030 | reiserfs_warning(s, |
| 1031 | "reiserfs_parse_options: journalled quota options not supported."); |
| 1032 | return 0; |
| 1033 | } |
| 1034 | #endif |
| 1035 | } |
| 1036 | |
| 1037 | #ifdef CONFIG_QUOTA |
| 1038 | if (!REISERFS_SB(s)->s_jquota_fmt |
| 1039 | && (REISERFS_SB(s)->s_qf_names[USRQUOTA] |
| 1040 | || REISERFS_SB(s)->s_qf_names[GRPQUOTA])) { |
| 1041 | reiserfs_warning(s, |
| 1042 | "reiserfs_parse_options: journalled quota format not specified."); |
| 1043 | return 0; |
| 1044 | } |
| 1045 | /* This checking is not precise wrt the quota type but for our purposes it is sufficient */ |
| 1046 | if (!(*mount_options & (1 << REISERFS_QUOTA)) |
| 1047 | && sb_any_quota_enabled(s)) { |
| 1048 | reiserfs_warning(s, |
| 1049 | "reiserfs_parse_options: quota options must be present when quota is turned on."); |
| 1050 | return 0; |
| 1051 | } |
| 1052 | #endif |
| 1053 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | } |
| 1056 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1057 | static void switch_data_mode(struct super_block *s, unsigned long mode) |
| 1058 | { |
| 1059 | REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) | |
| 1060 | (1 << REISERFS_DATA_ORDERED) | |
| 1061 | (1 << REISERFS_DATA_WRITEBACK)); |
| 1062 | REISERFS_SB(s)->s_mount_opt |= (1 << mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | } |
| 1064 | |
| 1065 | static void handle_data_mode(struct super_block *s, unsigned long mount_options) |
| 1066 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1067 | if (mount_options & (1 << REISERFS_DATA_LOG)) { |
| 1068 | if (!reiserfs_data_log(s)) { |
| 1069 | switch_data_mode(s, REISERFS_DATA_LOG); |
| 1070 | reiserfs_info(s, "switching to journaled data mode\n"); |
| 1071 | } |
| 1072 | } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) { |
| 1073 | if (!reiserfs_data_ordered(s)) { |
| 1074 | switch_data_mode(s, REISERFS_DATA_ORDERED); |
| 1075 | reiserfs_info(s, "switching to ordered data mode\n"); |
| 1076 | } |
| 1077 | } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) { |
| 1078 | if (!reiserfs_data_writeback(s)) { |
| 1079 | switch_data_mode(s, REISERFS_DATA_WRITEBACK); |
| 1080 | reiserfs_info(s, "switching to writeback data mode\n"); |
| 1081 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | } |
| 1084 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1085 | static void handle_barrier_mode(struct super_block *s, unsigned long bits) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1087 | int flush = (1 << REISERFS_BARRIER_FLUSH); |
| 1088 | int none = (1 << REISERFS_BARRIER_NONE); |
| 1089 | int all_barrier = flush | none; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1091 | if (bits & all_barrier) { |
| 1092 | REISERFS_SB(s)->s_mount_opt &= ~all_barrier; |
| 1093 | if (bits & flush) { |
| 1094 | REISERFS_SB(s)->s_mount_opt |= flush; |
| 1095 | printk("reiserfs: enabling write barrier flush mode\n"); |
| 1096 | } else if (bits & none) { |
| 1097 | REISERFS_SB(s)->s_mount_opt |= none; |
| 1098 | printk("reiserfs: write barriers turned off\n"); |
| 1099 | } |
| 1100 | } |
| 1101 | } |
| 1102 | |
| 1103 | static void handle_attrs(struct super_block *s) |
| 1104 | { |
| 1105 | struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s); |
| 1106 | |
| 1107 | if (reiserfs_attrs(s)) { |
| 1108 | if (old_format_only(s)) { |
| 1109 | reiserfs_warning(s, |
| 1110 | "reiserfs: cannot support attributes on 3.5.x disk format"); |
| 1111 | REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | return; |
| 1113 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1114 | if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) { |
| 1115 | reiserfs_warning(s, |
| 1116 | "reiserfs: cannot support attributes until flag is set in super-block"); |
| 1117 | REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | } |
| 1119 | } |
| 1120 | } |
| 1121 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1122 | static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1124 | struct reiserfs_super_block *rs; |
| 1125 | struct reiserfs_transaction_handle th; |
| 1126 | unsigned long blocks; |
| 1127 | unsigned long mount_options = REISERFS_SB(s)->s_mount_opt; |
| 1128 | unsigned long safe_mask = 0; |
| 1129 | unsigned int commit_max_age = (unsigned int)-1; |
| 1130 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
| 1131 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | #ifdef CONFIG_QUOTA |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1133 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | #endif |
| 1135 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1136 | rs = SB_DISK_SUPER_BLOCK(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1138 | if (!reiserfs_parse_options |
| 1139 | (s, arg, &mount_options, &blocks, NULL, &commit_max_age)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | #ifdef CONFIG_QUOTA |
James Lamanna | 833d304 | 2005-10-30 15:00:16 -0800 | [diff] [blame] | 1141 | for (i = 0; i < MAXQUOTAS; i++) { |
| 1142 | kfree(REISERFS_SB(s)->s_qf_names[i]); |
| 1143 | REISERFS_SB(s)->s_qf_names[i] = NULL; |
| 1144 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1145 | #endif |
| 1146 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1149 | handle_attrs(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1151 | /* Add options that are safe here */ |
| 1152 | safe_mask |= 1 << REISERFS_SMALLTAIL; |
| 1153 | safe_mask |= 1 << REISERFS_LARGETAIL; |
| 1154 | safe_mask |= 1 << REISERFS_NO_BORDER; |
| 1155 | safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION; |
| 1156 | safe_mask |= 1 << REISERFS_HASHED_RELOCATION; |
| 1157 | safe_mask |= 1 << REISERFS_TEST4; |
| 1158 | safe_mask |= 1 << REISERFS_ATTRS; |
| 1159 | safe_mask |= 1 << REISERFS_XATTRS_USER; |
| 1160 | safe_mask |= 1 << REISERFS_POSIXACL; |
| 1161 | safe_mask |= 1 << REISERFS_BARRIER_FLUSH; |
| 1162 | safe_mask |= 1 << REISERFS_BARRIER_NONE; |
| 1163 | safe_mask |= 1 << REISERFS_ERROR_RO; |
| 1164 | safe_mask |= 1 << REISERFS_ERROR_CONTINUE; |
| 1165 | safe_mask |= 1 << REISERFS_ERROR_PANIC; |
| 1166 | safe_mask |= 1 << REISERFS_QUOTA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1168 | /* Update the bitmask, taking care to keep |
| 1169 | * the bits we're not allowed to change here */ |
| 1170 | REISERFS_SB(s)->s_mount_opt = |
| 1171 | (REISERFS_SB(s)-> |
| 1172 | s_mount_opt & ~safe_mask) | (mount_options & safe_mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1174 | if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) { |
| 1175 | journal->j_max_commit_age = commit_max_age; |
| 1176 | journal->j_max_trans_age = commit_max_age; |
| 1177 | } else if (commit_max_age == 0) { |
| 1178 | /* 0 means restore defaults. */ |
| 1179 | journal->j_max_commit_age = journal->j_default_max_commit_age; |
| 1180 | journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; |
| 1181 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1183 | if (blocks) { |
| 1184 | int rc = reiserfs_resize(s, blocks); |
| 1185 | if (rc != 0) |
| 1186 | return rc; |
| 1187 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1189 | if (*mount_flags & MS_RDONLY) { |
| 1190 | reiserfs_xattr_init(s, *mount_flags); |
| 1191 | /* remount read-only */ |
| 1192 | if (s->s_flags & MS_RDONLY) |
| 1193 | /* it is read-only already */ |
| 1194 | return 0; |
| 1195 | /* try to remount file system with read-only permissions */ |
| 1196 | if (sb_umount_state(rs) == REISERFS_VALID_FS |
| 1197 | || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) { |
| 1198 | return 0; |
| 1199 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1201 | err = journal_begin(&th, s, 10); |
| 1202 | if (err) |
| 1203 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1205 | /* Mounting a rw partition read-only. */ |
| 1206 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); |
| 1207 | set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state); |
| 1208 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); |
| 1209 | } else { |
| 1210 | /* remount read-write */ |
| 1211 | if (!(s->s_flags & MS_RDONLY)) { |
| 1212 | reiserfs_xattr_init(s, *mount_flags); |
| 1213 | return 0; /* We are read-write already */ |
| 1214 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1216 | if (reiserfs_is_journal_aborted(journal)) |
| 1217 | return journal->j_errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1219 | handle_data_mode(s, mount_options); |
| 1220 | handle_barrier_mode(s, mount_options); |
| 1221 | REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); |
| 1222 | s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */ |
| 1223 | err = journal_begin(&th, s, 10); |
| 1224 | if (err) |
| 1225 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1227 | /* Mount a partition which is read-only, read-write */ |
| 1228 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); |
| 1229 | REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); |
| 1230 | s->s_flags &= ~MS_RDONLY; |
| 1231 | set_sb_umount_state(rs, REISERFS_ERROR_FS); |
| 1232 | /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */ |
| 1233 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); |
| 1234 | REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS; |
| 1235 | } |
| 1236 | /* this will force a full flush of all journal lists */ |
| 1237 | SB_JOURNAL(s)->j_must_wait = 1; |
| 1238 | err = journal_end(&th, s, 10); |
| 1239 | if (err) |
| 1240 | return err; |
| 1241 | s->s_dirt = 0; |
| 1242 | |
| 1243 | if (!(*mount_flags & MS_RDONLY)) { |
| 1244 | finish_unfinished(s); |
| 1245 | reiserfs_xattr_init(s, *mount_flags); |
| 1246 | } |
| 1247 | |
| 1248 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | } |
| 1250 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1251 | static int read_super_block(struct super_block *s, int offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1253 | struct buffer_head *bh; |
| 1254 | struct reiserfs_super_block *rs; |
| 1255 | int fs_blocksize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1257 | bh = sb_bread(s, offset / s->s_blocksize); |
| 1258 | if (!bh) { |
| 1259 | reiserfs_warning(s, "sh-2006: read_super_block: " |
| 1260 | "bread failed (dev %s, block %lu, size %lu)", |
| 1261 | reiserfs_bdevname(s), offset / s->s_blocksize, |
| 1262 | s->s_blocksize); |
| 1263 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1266 | rs = (struct reiserfs_super_block *)bh->b_data; |
| 1267 | if (!is_any_reiserfs_magic_string(rs)) { |
| 1268 | brelse(bh); |
| 1269 | return 1; |
| 1270 | } |
| 1271 | // |
| 1272 | // ok, reiserfs signature (old or new) found in at the given offset |
| 1273 | // |
| 1274 | fs_blocksize = sb_blocksize(rs); |
| 1275 | brelse(bh); |
| 1276 | sb_set_blocksize(s, fs_blocksize); |
| 1277 | |
| 1278 | bh = sb_bread(s, offset / s->s_blocksize); |
| 1279 | if (!bh) { |
| 1280 | reiserfs_warning(s, "sh-2007: read_super_block: " |
| 1281 | "bread failed (dev %s, block %lu, size %lu)\n", |
| 1282 | reiserfs_bdevname(s), offset / s->s_blocksize, |
| 1283 | s->s_blocksize); |
| 1284 | return 1; |
| 1285 | } |
| 1286 | |
| 1287 | rs = (struct reiserfs_super_block *)bh->b_data; |
| 1288 | if (sb_blocksize(rs) != s->s_blocksize) { |
| 1289 | reiserfs_warning(s, "sh-2011: read_super_block: " |
| 1290 | "can't find a reiserfs filesystem on (dev %s, block %Lu, size %lu)\n", |
| 1291 | reiserfs_bdevname(s), |
| 1292 | (unsigned long long)bh->b_blocknr, |
| 1293 | s->s_blocksize); |
| 1294 | brelse(bh); |
| 1295 | return 1; |
| 1296 | } |
| 1297 | |
| 1298 | if (rs->s_v1.s_root_block == cpu_to_le32(-1)) { |
| 1299 | brelse(bh); |
| 1300 | reiserfs_warning(s, |
| 1301 | "Unfinished reiserfsck --rebuild-tree run detected. Please run\n" |
| 1302 | "reiserfsck --rebuild-tree and wait for a completion. If that fails\n" |
| 1303 | "get newer reiserfsprogs package"); |
| 1304 | return 1; |
| 1305 | } |
| 1306 | |
| 1307 | SB_BUFFER_WITH_SB(s) = bh; |
| 1308 | SB_DISK_SUPER_BLOCK(s) = rs; |
| 1309 | |
| 1310 | if (is_reiserfs_jr(rs)) { |
| 1311 | /* magic is of non-standard journal filesystem, look at s_version to |
| 1312 | find which format is in use */ |
| 1313 | if (sb_version(rs) == REISERFS_VERSION_2) |
| 1314 | reiserfs_warning(s, |
| 1315 | "read_super_block: found reiserfs format \"3.6\"" |
| 1316 | " with non-standard journal"); |
| 1317 | else if (sb_version(rs) == REISERFS_VERSION_1) |
| 1318 | reiserfs_warning(s, |
| 1319 | "read_super_block: found reiserfs format \"3.5\"" |
| 1320 | " with non-standard journal"); |
| 1321 | else { |
| 1322 | reiserfs_warning(s, |
| 1323 | "sh-2012: read_super_block: found unknown " |
| 1324 | "format \"%u\" of reiserfs with non-standard magic", |
| 1325 | sb_version(rs)); |
| 1326 | return 1; |
| 1327 | } |
| 1328 | } else |
| 1329 | /* s_version of standard format may contain incorrect information, |
| 1330 | so we just look at the magic string */ |
| 1331 | reiserfs_info(s, |
| 1332 | "found reiserfs format \"%s\" with standard journal\n", |
| 1333 | is_reiserfs_3_5(rs) ? "3.5" : "3.6"); |
| 1334 | |
| 1335 | s->s_op = &reiserfs_sops; |
| 1336 | s->s_export_op = &reiserfs_export_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | #ifdef CONFIG_QUOTA |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1338 | s->s_qcop = &reiserfs_qctl_operations; |
| 1339 | s->dq_op = &reiserfs_quota_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | #endif |
| 1341 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1342 | /* new format is limited by the 32 bit wide i_blocks field, want to |
| 1343 | ** be one full block below that. |
| 1344 | */ |
| 1345 | s->s_maxbytes = (512LL << 32) - s->s_blocksize; |
| 1346 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1347 | } |
| 1348 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | /* after journal replay, reread all bitmap and super blocks */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1350 | static int reread_meta_blocks(struct super_block *s) |
| 1351 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1352 | ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s))); |
| 1353 | wait_on_buffer(SB_BUFFER_WITH_SB(s)); |
| 1354 | if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) { |
| 1355 | reiserfs_warning(s, |
| 1356 | "reread_meta_blocks, error reading the super"); |
| 1357 | return 1; |
| 1358 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1360 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | } |
| 1362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | ///////////////////////////////////////////////////// |
| 1364 | // hash detection stuff |
| 1365 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | // if root directory is empty - we set default - Yura's - hash and |
| 1367 | // warn about it |
| 1368 | // FIXME: we look for only one name in a directory. If tea and yura |
| 1369 | // bith have the same value - we ask user to send report to the |
| 1370 | // mailing list |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1371 | static __u32 find_hash_out(struct super_block *s) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1373 | int retval; |
| 1374 | struct inode *inode; |
| 1375 | struct cpu_key key; |
| 1376 | INITIALIZE_PATH(path); |
| 1377 | struct reiserfs_dir_entry de; |
| 1378 | __u32 hash = DEFAULT_HASH; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1380 | inode = s->s_root->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1382 | do { // Some serious "goto"-hater was there ;) |
| 1383 | u32 teahash, r5hash, yurahash; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1384 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1385 | make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3); |
| 1386 | retval = search_by_entry_key(s, &key, &path, &de); |
| 1387 | if (retval == IO_ERROR) { |
| 1388 | pathrelse(&path); |
| 1389 | return UNSET_HASH; |
| 1390 | } |
| 1391 | if (retval == NAME_NOT_FOUND) |
| 1392 | de.de_entry_num--; |
| 1393 | set_de_name_and_namelen(&de); |
| 1394 | if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) { |
| 1395 | /* allow override in this case */ |
| 1396 | if (reiserfs_rupasov_hash(s)) { |
| 1397 | hash = YURA_HASH; |
| 1398 | } |
| 1399 | reiserfs_warning(s, "FS seems to be empty, autodetect " |
| 1400 | "is using the default hash"); |
| 1401 | break; |
| 1402 | } |
| 1403 | r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen)); |
| 1404 | teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen)); |
| 1405 | yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen)); |
| 1406 | if (((teahash == r5hash) |
| 1407 | && |
| 1408 | (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) |
| 1409 | == r5hash)) || ((teahash == yurahash) |
| 1410 | && (yurahash == |
| 1411 | GET_HASH_VALUE(deh_offset |
| 1412 | (& |
| 1413 | (de. |
| 1414 | de_deh[de. |
| 1415 | de_entry_num]))))) |
| 1416 | || ((r5hash == yurahash) |
| 1417 | && (yurahash == |
| 1418 | GET_HASH_VALUE(deh_offset |
| 1419 | (&(de.de_deh[de.de_entry_num])))))) { |
| 1420 | reiserfs_warning(s, |
| 1421 | "Unable to automatically detect hash function. " |
| 1422 | "Please mount with -o hash={tea,rupasov,r5}", |
| 1423 | reiserfs_bdevname(s)); |
| 1424 | hash = UNSET_HASH; |
| 1425 | break; |
| 1426 | } |
| 1427 | if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) == |
| 1428 | yurahash) |
| 1429 | hash = YURA_HASH; |
| 1430 | else if (GET_HASH_VALUE |
| 1431 | (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash) |
| 1432 | hash = TEA_HASH; |
| 1433 | else if (GET_HASH_VALUE |
| 1434 | (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash) |
| 1435 | hash = R5_HASH; |
| 1436 | else { |
| 1437 | reiserfs_warning(s, "Unrecognised hash function"); |
| 1438 | hash = UNSET_HASH; |
| 1439 | } |
| 1440 | } while (0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1442 | pathrelse(&path); |
| 1443 | return hash; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | } |
| 1445 | |
| 1446 | // finds out which hash names are sorted with |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1447 | static int what_hash(struct super_block *s) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1449 | __u32 code; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1451 | code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1453 | /* reiserfs_hash_detect() == true if any of the hash mount options |
| 1454 | ** were used. We must check them to make sure the user isn't |
| 1455 | ** using a bad hash value |
| 1456 | */ |
| 1457 | if (code == UNSET_HASH || reiserfs_hash_detect(s)) |
| 1458 | code = find_hash_out(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1460 | if (code != UNSET_HASH && reiserfs_hash_detect(s)) { |
| 1461 | /* detection has found the hash, and we must check against the |
| 1462 | ** mount options |
| 1463 | */ |
| 1464 | if (reiserfs_rupasov_hash(s) && code != YURA_HASH) { |
| 1465 | reiserfs_warning(s, "Error, %s hash detected, " |
| 1466 | "unable to force rupasov hash", |
| 1467 | reiserfs_hashname(code)); |
| 1468 | code = UNSET_HASH; |
| 1469 | } else if (reiserfs_tea_hash(s) && code != TEA_HASH) { |
| 1470 | reiserfs_warning(s, "Error, %s hash detected, " |
| 1471 | "unable to force tea hash", |
| 1472 | reiserfs_hashname(code)); |
| 1473 | code = UNSET_HASH; |
| 1474 | } else if (reiserfs_r5_hash(s) && code != R5_HASH) { |
| 1475 | reiserfs_warning(s, "Error, %s hash detected, " |
| 1476 | "unable to force r5 hash", |
| 1477 | reiserfs_hashname(code)); |
| 1478 | code = UNSET_HASH; |
| 1479 | } |
| 1480 | } else { |
| 1481 | /* find_hash_out was not called or could not determine the hash */ |
| 1482 | if (reiserfs_rupasov_hash(s)) { |
| 1483 | code = YURA_HASH; |
| 1484 | } else if (reiserfs_tea_hash(s)) { |
| 1485 | code = TEA_HASH; |
| 1486 | } else if (reiserfs_r5_hash(s)) { |
| 1487 | code = R5_HASH; |
| 1488 | } |
| 1489 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1491 | /* if we are mounted RW, and we have a new valid hash code, update |
| 1492 | ** the super |
| 1493 | */ |
| 1494 | if (code != UNSET_HASH && |
| 1495 | !(s->s_flags & MS_RDONLY) && |
| 1496 | code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) { |
| 1497 | set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code); |
| 1498 | } |
| 1499 | return code; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | } |
| 1501 | |
| 1502 | // return pointer to appropriate function |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1503 | static hashf_t hash_function(struct super_block *s) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1504 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1505 | switch (what_hash(s)) { |
| 1506 | case TEA_HASH: |
| 1507 | reiserfs_info(s, "Using tea hash to sort names\n"); |
| 1508 | return keyed_hash; |
| 1509 | case YURA_HASH: |
| 1510 | reiserfs_info(s, "Using rupasov hash to sort names\n"); |
| 1511 | return yura_hash; |
| 1512 | case R5_HASH: |
| 1513 | reiserfs_info(s, "Using r5 hash to sort names\n"); |
| 1514 | return r5_hash; |
| 1515 | } |
| 1516 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | } |
| 1518 | |
| 1519 | // this is used to set up correct value for old partitions |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1520 | static int function2code(hashf_t func) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1522 | if (func == keyed_hash) |
| 1523 | return TEA_HASH; |
| 1524 | if (func == yura_hash) |
| 1525 | return YURA_HASH; |
| 1526 | if (func == r5_hash) |
| 1527 | return R5_HASH; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1528 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1529 | BUG(); // should never happen |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1530 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1531 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | } |
| 1533 | |
| 1534 | #define SWARN(silent, s, ...) \ |
| 1535 | if (!(silent)) \ |
| 1536 | reiserfs_warning (s, __VA_ARGS__) |
| 1537 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1538 | static int reiserfs_fill_super(struct super_block *s, void *data, int silent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1539 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1540 | struct inode *root_inode; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1541 | struct reiserfs_transaction_handle th; |
| 1542 | int old_format = 0; |
| 1543 | unsigned long blocks; |
| 1544 | unsigned int commit_max_age = 0; |
| 1545 | int jinit_done = 0; |
| 1546 | struct reiserfs_iget_args args; |
| 1547 | struct reiserfs_super_block *rs; |
| 1548 | char *jdev_name; |
| 1549 | struct reiserfs_sb_info *sbi; |
| 1550 | int errval = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1551 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1552 | sbi = kmalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL); |
| 1553 | if (!sbi) { |
| 1554 | errval = -ENOMEM; |
| 1555 | goto error; |
| 1556 | } |
| 1557 | s->s_fs_info = sbi; |
| 1558 | memset(sbi, 0, sizeof(struct reiserfs_sb_info)); |
| 1559 | /* Set default values for options: non-aggressive tails, RO on errors */ |
| 1560 | REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL); |
| 1561 | REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO); |
| 1562 | /* no preallocation minimum, be smart in |
| 1563 | reiserfs_file_write instead */ |
| 1564 | REISERFS_SB(s)->s_alloc_options.preallocmin = 0; |
| 1565 | /* Preallocate by 16 blocks (17-1) at once */ |
| 1566 | REISERFS_SB(s)->s_alloc_options.preallocsize = 17; |
| 1567 | /* Initialize the rwsem for xattr dir */ |
| 1568 | init_rwsem(&REISERFS_SB(s)->xattr_dir_sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1570 | /* setup default block allocator options */ |
| 1571 | reiserfs_init_alloc_options(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1573 | jdev_name = NULL; |
| 1574 | if (reiserfs_parse_options |
| 1575 | (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name, |
| 1576 | &commit_max_age) == 0) { |
| 1577 | goto error; |
| 1578 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1580 | if (blocks) { |
| 1581 | SWARN(silent, s, "jmacd-7: reiserfs_fill_super: resize option " |
| 1582 | "for remount only"); |
| 1583 | goto error; |
| 1584 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1585 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1586 | /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */ |
| 1587 | if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES)) |
| 1588 | old_format = 1; |
| 1589 | /* try new format (64-th 1k block), which can contain reiserfs super block */ |
| 1590 | else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) { |
| 1591 | SWARN(silent, s, |
| 1592 | "sh-2021: reiserfs_fill_super: can not find reiserfs on %s", |
| 1593 | reiserfs_bdevname(s)); |
| 1594 | goto error; |
| 1595 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1596 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1597 | rs = SB_DISK_SUPER_BLOCK(s); |
| 1598 | /* Let's do basic sanity check to verify that underlying device is not |
| 1599 | smaller than the filesystem. If the check fails then abort and scream, |
| 1600 | because bad stuff will happen otherwise. */ |
| 1601 | if (s->s_bdev && s->s_bdev->bd_inode |
| 1602 | && i_size_read(s->s_bdev->bd_inode) < |
| 1603 | sb_block_count(rs) * sb_blocksize(rs)) { |
| 1604 | SWARN(silent, s, |
| 1605 | "Filesystem on %s cannot be mounted because it is bigger than the device", |
| 1606 | reiserfs_bdevname(s)); |
| 1607 | SWARN(silent, s, |
| 1608 | "You may need to run fsck or increase size of your LVM partition"); |
| 1609 | SWARN(silent, s, |
| 1610 | "Or may be you forgot to reboot after fdisk when it told you to"); |
| 1611 | goto error; |
| 1612 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1613 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1614 | sbi->s_mount_state = SB_REISERFS_STATE(s); |
| 1615 | sbi->s_mount_state = REISERFS_VALID_FS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1616 | |
Jeff Mahoney | 6f01046 | 2006-09-30 23:28:43 -0700 | [diff] [blame] | 1617 | if ((errval = reiserfs_init_bitmap_cache(s))) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1618 | SWARN(silent, s, |
| 1619 | "jmacd-8: reiserfs_fill_super: unable to read bitmap"); |
| 1620 | goto error; |
| 1621 | } |
Jeff Mahoney | d2c89a4 | 2006-11-02 22:07:20 -0800 | [diff] [blame] | 1622 | errval = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1623 | #ifdef CONFIG_REISERFS_CHECK |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1624 | SWARN(silent, s, "CONFIG_REISERFS_CHECK is set ON"); |
| 1625 | SWARN(silent, s, "- it is slow mode for debugging."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1626 | #endif |
| 1627 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1628 | /* make data=ordered the default */ |
| 1629 | if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) && |
| 1630 | !reiserfs_data_writeback(s)) { |
| 1631 | REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | } |
| 1633 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1634 | if (reiserfs_data_log(s)) { |
| 1635 | reiserfs_info(s, "using journaled data mode\n"); |
| 1636 | } else if (reiserfs_data_ordered(s)) { |
| 1637 | reiserfs_info(s, "using ordered data mode\n"); |
| 1638 | } else { |
| 1639 | reiserfs_info(s, "using writeback data mode\n"); |
| 1640 | } |
| 1641 | if (reiserfs_barrier_flush(s)) { |
| 1642 | printk("reiserfs: using flush barriers\n"); |
| 1643 | } |
| 1644 | // set_device_ro(s->s_dev, 1) ; |
| 1645 | if (journal_init(s, jdev_name, old_format, commit_max_age)) { |
| 1646 | SWARN(silent, s, |
| 1647 | "sh-2022: reiserfs_fill_super: unable to initialize journal space"); |
| 1648 | goto error; |
| 1649 | } else { |
| 1650 | jinit_done = 1; /* once this is set, journal_release must be called |
| 1651 | ** if we error out of the mount |
| 1652 | */ |
| 1653 | } |
| 1654 | if (reread_meta_blocks(s)) { |
| 1655 | SWARN(silent, s, |
| 1656 | "jmacd-9: reiserfs_fill_super: unable to reread meta blocks after journal init"); |
| 1657 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | } |
| 1659 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1660 | if (replay_only(s)) |
| 1661 | goto error; |
| 1662 | |
| 1663 | if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) { |
| 1664 | SWARN(silent, s, |
| 1665 | "clm-7000: Detected readonly device, marking FS readonly"); |
| 1666 | s->s_flags |= MS_RDONLY; |
| 1667 | } |
| 1668 | args.objectid = REISERFS_ROOT_OBJECTID; |
| 1669 | args.dirid = REISERFS_ROOT_PARENT_OBJECTID; |
| 1670 | root_inode = |
| 1671 | iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, |
| 1672 | reiserfs_init_locked_inode, (void *)(&args)); |
| 1673 | if (!root_inode) { |
| 1674 | SWARN(silent, s, |
| 1675 | "jmacd-10: reiserfs_fill_super: get root inode failed"); |
| 1676 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1677 | } |
| 1678 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1679 | if (root_inode->i_state & I_NEW) { |
| 1680 | reiserfs_read_locked_inode(root_inode, &args); |
| 1681 | unlock_new_inode(root_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1682 | } |
| 1683 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1684 | s->s_root = d_alloc_root(root_inode); |
| 1685 | if (!s->s_root) { |
| 1686 | iput(root_inode); |
| 1687 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1688 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1689 | // define and initialize hash function |
| 1690 | sbi->s_hash_function = hash_function(s); |
| 1691 | if (sbi->s_hash_function == NULL) { |
| 1692 | dput(s->s_root); |
| 1693 | s->s_root = NULL; |
| 1694 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1696 | |
| 1697 | if (is_reiserfs_3_5(rs) |
| 1698 | || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1)) |
| 1699 | set_bit(REISERFS_3_5, &(sbi->s_properties)); |
Jeff Mahoney | e1fabd3 | 2006-09-30 23:28:40 -0700 | [diff] [blame] | 1700 | else if (old_format) |
| 1701 | set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties)); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1702 | else |
| 1703 | set_bit(REISERFS_3_6, &(sbi->s_properties)); |
| 1704 | |
| 1705 | if (!(s->s_flags & MS_RDONLY)) { |
| 1706 | |
| 1707 | errval = journal_begin(&th, s, 1); |
| 1708 | if (errval) { |
| 1709 | dput(s->s_root); |
| 1710 | s->s_root = NULL; |
| 1711 | goto error; |
| 1712 | } |
| 1713 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); |
| 1714 | |
| 1715 | set_sb_umount_state(rs, REISERFS_ERROR_FS); |
| 1716 | set_sb_fs_state(rs, 0); |
| 1717 | |
| 1718 | if (old_format_only(s)) { |
| 1719 | /* filesystem of format 3.5 either with standard or non-standard |
| 1720 | journal */ |
| 1721 | if (convert_reiserfs(s)) { |
| 1722 | /* and -o conv is given */ |
| 1723 | if (!silent) |
| 1724 | reiserfs_info(s, |
| 1725 | "converting 3.5 filesystem to the 3.6 format"); |
| 1726 | |
| 1727 | if (is_reiserfs_3_5(rs)) |
| 1728 | /* put magic string of 3.6 format. 2.2 will not be able to |
| 1729 | mount this filesystem anymore */ |
| 1730 | memcpy(rs->s_v1.s_magic, |
| 1731 | reiserfs_3_6_magic_string, |
| 1732 | sizeof |
| 1733 | (reiserfs_3_6_magic_string)); |
| 1734 | |
| 1735 | set_sb_version(rs, REISERFS_VERSION_2); |
| 1736 | reiserfs_convert_objectid_map_v1(s); |
| 1737 | set_bit(REISERFS_3_6, &(sbi->s_properties)); |
| 1738 | clear_bit(REISERFS_3_5, &(sbi->s_properties)); |
| 1739 | } else if (!silent) { |
| 1740 | reiserfs_info(s, "using 3.5.x disk format\n"); |
| 1741 | } |
| 1742 | } |
| 1743 | |
| 1744 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); |
| 1745 | errval = journal_end(&th, s, 1); |
| 1746 | if (errval) { |
| 1747 | dput(s->s_root); |
| 1748 | s->s_root = NULL; |
| 1749 | goto error; |
| 1750 | } |
| 1751 | |
| 1752 | if ((errval = reiserfs_xattr_init(s, s->s_flags))) { |
| 1753 | dput(s->s_root); |
| 1754 | s->s_root = NULL; |
| 1755 | goto error; |
| 1756 | } |
| 1757 | |
| 1758 | /* look for files which were to be removed in previous session */ |
| 1759 | finish_unfinished(s); |
| 1760 | } else { |
| 1761 | if (old_format_only(s) && !silent) { |
| 1762 | reiserfs_info(s, "using 3.5.x disk format\n"); |
| 1763 | } |
| 1764 | |
| 1765 | if ((errval = reiserfs_xattr_init(s, s->s_flags))) { |
| 1766 | dput(s->s_root); |
| 1767 | s->s_root = NULL; |
| 1768 | goto error; |
| 1769 | } |
| 1770 | } |
| 1771 | // mark hash in super block: it could be unset. overwrite should be ok |
| 1772 | set_sb_hash_function_code(rs, function2code(sbi->s_hash_function)); |
| 1773 | |
| 1774 | handle_attrs(s); |
| 1775 | |
| 1776 | reiserfs_proc_info_init(s); |
| 1777 | |
| 1778 | init_waitqueue_head(&(sbi->s_wait)); |
| 1779 | spin_lock_init(&sbi->bitmap_lock); |
| 1780 | |
| 1781 | return (0); |
| 1782 | |
| 1783 | error: |
| 1784 | if (jinit_done) { /* kill the commit thread, free journal ram */ |
| 1785 | journal_release_error(NULL, s); |
| 1786 | } |
Jeff Mahoney | 5065227 | 2006-09-30 23:28:44 -0700 | [diff] [blame] | 1787 | |
| 1788 | reiserfs_free_bitmap_cache(s); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1789 | if (SB_BUFFER_WITH_SB(s)) |
| 1790 | brelse(SB_BUFFER_WITH_SB(s)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1791 | #ifdef CONFIG_QUOTA |
Jeff Mahoney | 5065227 | 2006-09-30 23:28:44 -0700 | [diff] [blame] | 1792 | { |
| 1793 | int j; |
| 1794 | for (j = 0; j < MAXQUOTAS; j++) { |
| 1795 | kfree(sbi->s_qf_names[j]); |
| 1796 | sbi->s_qf_names[j] = NULL; |
| 1797 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1798 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1799 | #endif |
James Lamanna | 833d304 | 2005-10-30 15:00:16 -0800 | [diff] [blame] | 1800 | kfree(sbi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1801 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1802 | s->s_fs_info = NULL; |
| 1803 | return errval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1804 | } |
| 1805 | |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 1806 | static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1807 | { |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 1808 | struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1809 | |
| 1810 | buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize)); |
| 1811 | buf->f_bfree = sb_free_blocks(rs); |
| 1812 | buf->f_bavail = buf->f_bfree; |
| 1813 | buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1; |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 1814 | buf->f_bsize = dentry->d_sb->s_blocksize; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1815 | /* changed to accommodate gcc folks. */ |
| 1816 | buf->f_type = REISERFS_SUPER_MAGIC; |
| 1817 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1818 | } |
| 1819 | |
| 1820 | #ifdef CONFIG_QUOTA |
| 1821 | static int reiserfs_dquot_initialize(struct inode *inode, int type) |
| 1822 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1823 | struct reiserfs_transaction_handle th; |
| 1824 | int ret, err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1825 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1826 | /* We may create quota structure so we need to reserve enough blocks */ |
| 1827 | reiserfs_write_lock(inode->i_sb); |
| 1828 | ret = |
| 1829 | journal_begin(&th, inode->i_sb, |
| 1830 | 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb)); |
| 1831 | if (ret) |
| 1832 | goto out; |
| 1833 | ret = dquot_initialize(inode, type); |
| 1834 | err = |
| 1835 | journal_end(&th, inode->i_sb, |
| 1836 | 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb)); |
| 1837 | if (!ret && err) |
| 1838 | ret = err; |
| 1839 | out: |
| 1840 | reiserfs_write_unlock(inode->i_sb); |
| 1841 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1842 | } |
| 1843 | |
| 1844 | static int reiserfs_dquot_drop(struct inode *inode) |
| 1845 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1846 | struct reiserfs_transaction_handle th; |
| 1847 | int ret, err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1849 | /* We may delete quota structure so we need to reserve enough blocks */ |
| 1850 | reiserfs_write_lock(inode->i_sb); |
| 1851 | ret = |
| 1852 | journal_begin(&th, inode->i_sb, |
| 1853 | 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb)); |
| 1854 | if (ret) |
| 1855 | goto out; |
| 1856 | ret = dquot_drop(inode); |
| 1857 | err = |
| 1858 | journal_end(&th, inode->i_sb, |
| 1859 | 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb)); |
| 1860 | if (!ret && err) |
| 1861 | ret = err; |
| 1862 | out: |
| 1863 | reiserfs_write_unlock(inode->i_sb); |
| 1864 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1865 | } |
| 1866 | |
| 1867 | static int reiserfs_write_dquot(struct dquot *dquot) |
| 1868 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1869 | struct reiserfs_transaction_handle th; |
| 1870 | int ret, err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1871 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1872 | reiserfs_write_lock(dquot->dq_sb); |
| 1873 | ret = |
| 1874 | journal_begin(&th, dquot->dq_sb, |
| 1875 | REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
| 1876 | if (ret) |
| 1877 | goto out; |
| 1878 | ret = dquot_commit(dquot); |
| 1879 | err = |
| 1880 | journal_end(&th, dquot->dq_sb, |
| 1881 | REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
| 1882 | if (!ret && err) |
| 1883 | ret = err; |
| 1884 | out: |
| 1885 | reiserfs_write_unlock(dquot->dq_sb); |
| 1886 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1887 | } |
| 1888 | |
| 1889 | static int reiserfs_acquire_dquot(struct dquot *dquot) |
| 1890 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1891 | struct reiserfs_transaction_handle th; |
| 1892 | int ret, err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1893 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1894 | reiserfs_write_lock(dquot->dq_sb); |
| 1895 | ret = |
| 1896 | journal_begin(&th, dquot->dq_sb, |
| 1897 | REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
| 1898 | if (ret) |
| 1899 | goto out; |
| 1900 | ret = dquot_acquire(dquot); |
| 1901 | err = |
| 1902 | journal_end(&th, dquot->dq_sb, |
| 1903 | REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
| 1904 | if (!ret && err) |
| 1905 | ret = err; |
| 1906 | out: |
| 1907 | reiserfs_write_unlock(dquot->dq_sb); |
| 1908 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | } |
| 1910 | |
| 1911 | static int reiserfs_release_dquot(struct dquot *dquot) |
| 1912 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1913 | struct reiserfs_transaction_handle th; |
| 1914 | int ret, err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1915 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1916 | reiserfs_write_lock(dquot->dq_sb); |
| 1917 | ret = |
| 1918 | journal_begin(&th, dquot->dq_sb, |
| 1919 | REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
| 1920 | if (ret) |
| 1921 | goto out; |
| 1922 | ret = dquot_release(dquot); |
| 1923 | err = |
| 1924 | journal_end(&th, dquot->dq_sb, |
| 1925 | REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
| 1926 | if (!ret && err) |
| 1927 | ret = err; |
| 1928 | out: |
| 1929 | reiserfs_write_unlock(dquot->dq_sb); |
| 1930 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1931 | } |
| 1932 | |
| 1933 | static int reiserfs_mark_dquot_dirty(struct dquot *dquot) |
| 1934 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1935 | /* Are we journalling quotas? */ |
| 1936 | if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
| 1937 | REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { |
| 1938 | dquot_mark_dquot_dirty(dquot); |
| 1939 | return reiserfs_write_dquot(dquot); |
| 1940 | } else |
| 1941 | return dquot_mark_dquot_dirty(dquot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1942 | } |
| 1943 | |
| 1944 | static int reiserfs_write_info(struct super_block *sb, int type) |
| 1945 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1946 | struct reiserfs_transaction_handle th; |
| 1947 | int ret, err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1948 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1949 | /* Data block + inode block */ |
| 1950 | reiserfs_write_lock(sb); |
| 1951 | ret = journal_begin(&th, sb, 2); |
| 1952 | if (ret) |
| 1953 | goto out; |
| 1954 | ret = dquot_commit_info(sb, type); |
| 1955 | err = journal_end(&th, sb, 2); |
| 1956 | if (!ret && err) |
| 1957 | ret = err; |
| 1958 | out: |
| 1959 | reiserfs_write_unlock(sb); |
| 1960 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1961 | } |
| 1962 | |
| 1963 | /* |
Christoph Hellwig | 84de856 | 2005-06-23 00:09:16 -0700 | [diff] [blame] | 1964 | * Turn on quotas during mount time - we need to find the quota file and such... |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1965 | */ |
| 1966 | static int reiserfs_quota_on_mount(struct super_block *sb, int type) |
| 1967 | { |
Christoph Hellwig | 84de856 | 2005-06-23 00:09:16 -0700 | [diff] [blame] | 1968 | return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type], |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1969 | REISERFS_SB(sb)->s_jquota_fmt, type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1970 | } |
| 1971 | |
| 1972 | /* |
| 1973 | * Standard function to be called on quota_on |
| 1974 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1975 | static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, |
| 1976 | char *path) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1977 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1978 | int err; |
| 1979 | struct nameidata nd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1980 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1981 | if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA))) |
| 1982 | return -EINVAL; |
| 1983 | err = path_lookup(path, LOOKUP_FOLLOW, &nd); |
| 1984 | if (err) |
| 1985 | return err; |
| 1986 | /* Quotafile not on the same filesystem? */ |
| 1987 | if (nd.mnt->mnt_sb != sb) { |
| 1988 | path_release(&nd); |
| 1989 | return -EXDEV; |
| 1990 | } |
| 1991 | /* We must not pack tails for quota files on reiserfs for quota IO to work */ |
| 1992 | if (!REISERFS_I(nd.dentry->d_inode)->i_flags & i_nopack_mask) { |
| 1993 | reiserfs_warning(sb, |
| 1994 | "reiserfs: Quota file must have tail packing disabled."); |
| 1995 | path_release(&nd); |
| 1996 | return -EINVAL; |
| 1997 | } |
| 1998 | /* Not journalling quota? No more tests needed... */ |
| 1999 | if (!REISERFS_SB(sb)->s_qf_names[USRQUOTA] && |
| 2000 | !REISERFS_SB(sb)->s_qf_names[GRPQUOTA]) { |
| 2001 | path_release(&nd); |
| 2002 | return vfs_quota_on(sb, type, format_id, path); |
| 2003 | } |
| 2004 | /* Quotafile not of fs root? */ |
| 2005 | if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode) |
| 2006 | reiserfs_warning(sb, |
| 2007 | "reiserfs: Quota file not on filesystem root. " |
| 2008 | "Journalled quota will not work."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2009 | path_release(&nd); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2010 | return vfs_quota_on(sb, type, format_id, path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2011 | } |
| 2012 | |
| 2013 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
| 2014 | * acquiring the locks... As quota files are never truncated and quota code |
| 2015 | * itself serializes the operations (and noone else should touch the files) |
| 2016 | * we don't have to be afraid of races */ |
| 2017 | static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data, |
| 2018 | size_t len, loff_t off) |
| 2019 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2020 | struct inode *inode = sb_dqopt(sb)->files[type]; |
| 2021 | unsigned long blk = off >> sb->s_blocksize_bits; |
| 2022 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; |
| 2023 | size_t toread; |
| 2024 | struct buffer_head tmp_bh, *bh; |
| 2025 | loff_t i_size = i_size_read(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2026 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2027 | if (off > i_size) |
| 2028 | return 0; |
| 2029 | if (off + len > i_size) |
| 2030 | len = i_size - off; |
| 2031 | toread = len; |
| 2032 | while (toread > 0) { |
| 2033 | tocopy = |
| 2034 | sb->s_blocksize - offset < |
| 2035 | toread ? sb->s_blocksize - offset : toread; |
| 2036 | tmp_bh.b_state = 0; |
| 2037 | /* Quota files are without tails so we can safely use this function */ |
| 2038 | reiserfs_write_lock(sb); |
| 2039 | err = reiserfs_get_block(inode, blk, &tmp_bh, 0); |
| 2040 | reiserfs_write_unlock(sb); |
| 2041 | if (err) |
| 2042 | return err; |
| 2043 | if (!buffer_mapped(&tmp_bh)) /* A hole? */ |
| 2044 | memset(data, 0, tocopy); |
| 2045 | else { |
| 2046 | bh = sb_bread(sb, tmp_bh.b_blocknr); |
| 2047 | if (!bh) |
| 2048 | return -EIO; |
| 2049 | memcpy(data, bh->b_data + offset, tocopy); |
| 2050 | brelse(bh); |
| 2051 | } |
| 2052 | offset = 0; |
| 2053 | toread -= tocopy; |
| 2054 | data += tocopy; |
| 2055 | blk++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2056 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2057 | return len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | } |
| 2059 | |
| 2060 | /* Write to quotafile (we know the transaction is already started and has |
| 2061 | * enough credits) */ |
| 2062 | static ssize_t reiserfs_quota_write(struct super_block *sb, int type, |
| 2063 | const char *data, size_t len, loff_t off) |
| 2064 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2065 | struct inode *inode = sb_dqopt(sb)->files[type]; |
| 2066 | unsigned long blk = off >> sb->s_blocksize_bits; |
| 2067 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; |
| 2068 | int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL; |
| 2069 | size_t towrite = len; |
| 2070 | struct buffer_head tmp_bh, *bh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2071 | |
Arjan van de Ven | 5c81a41 | 2006-07-03 00:25:20 -0700 | [diff] [blame] | 2072 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2073 | while (towrite > 0) { |
| 2074 | tocopy = sb->s_blocksize - offset < towrite ? |
| 2075 | sb->s_blocksize - offset : towrite; |
| 2076 | tmp_bh.b_state = 0; |
| 2077 | err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE); |
| 2078 | if (err) |
| 2079 | goto out; |
| 2080 | if (offset || tocopy != sb->s_blocksize) |
| 2081 | bh = sb_bread(sb, tmp_bh.b_blocknr); |
| 2082 | else |
| 2083 | bh = sb_getblk(sb, tmp_bh.b_blocknr); |
| 2084 | if (!bh) { |
| 2085 | err = -EIO; |
| 2086 | goto out; |
| 2087 | } |
| 2088 | lock_buffer(bh); |
| 2089 | memcpy(bh->b_data + offset, data, tocopy); |
| 2090 | flush_dcache_page(bh->b_page); |
| 2091 | set_buffer_uptodate(bh); |
| 2092 | unlock_buffer(bh); |
| 2093 | reiserfs_prepare_for_journal(sb, bh, 1); |
| 2094 | journal_mark_dirty(current->journal_info, sb, bh); |
| 2095 | if (!journal_quota) |
| 2096 | reiserfs_add_ordered_list(inode, bh); |
| 2097 | brelse(bh); |
| 2098 | offset = 0; |
| 2099 | towrite -= tocopy; |
| 2100 | data += tocopy; |
| 2101 | blk++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2102 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2103 | out: |
| 2104 | if (len == towrite) |
| 2105 | return err; |
| 2106 | if (inode->i_size < off + len - towrite) |
| 2107 | i_size_write(inode, off + len - towrite); |
| 2108 | inode->i_version++; |
| 2109 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 2110 | mark_inode_dirty(inode); |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 2111 | mutex_unlock(&inode->i_mutex); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2112 | return len - towrite; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2113 | } |
| 2114 | |
| 2115 | #endif |
| 2116 | |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 2117 | static int get_super_block(struct file_system_type *fs_type, |
| 2118 | int flags, const char *dev_name, |
| 2119 | void *data, struct vfsmount *mnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2120 | { |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 2121 | return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super, |
| 2122 | mnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2123 | } |
| 2124 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2125 | static int __init init_reiserfs_fs(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2126 | { |
| 2127 | int ret; |
| 2128 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2129 | if ((ret = init_inodecache())) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2130 | return ret; |
| 2131 | } |
| 2132 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2133 | if ((ret = reiserfs_xattr_register_handlers())) |
| 2134 | goto failed_reiserfs_xattr_register_handlers; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2135 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2136 | reiserfs_proc_info_global_init(); |
| 2137 | reiserfs_proc_register_global("version", |
| 2138 | reiserfs_global_version_in_proc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2139 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2140 | ret = register_filesystem(&reiserfs_fs_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2141 | |
| 2142 | if (ret == 0) { |
| 2143 | return 0; |
| 2144 | } |
| 2145 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2146 | reiserfs_xattr_unregister_handlers(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2147 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2148 | failed_reiserfs_xattr_register_handlers: |
| 2149 | reiserfs_proc_unregister_global("version"); |
| 2150 | reiserfs_proc_info_global_done(); |
| 2151 | destroy_inodecache(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2152 | |
| 2153 | return ret; |
| 2154 | } |
| 2155 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2156 | static void __exit exit_reiserfs_fs(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2157 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2158 | reiserfs_xattr_unregister_handlers(); |
| 2159 | reiserfs_proc_unregister_global("version"); |
| 2160 | reiserfs_proc_info_global_done(); |
| 2161 | unregister_filesystem(&reiserfs_fs_type); |
| 2162 | destroy_inodecache(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2163 | } |
| 2164 | |
| 2165 | struct file_system_type reiserfs_fs_type = { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2166 | .owner = THIS_MODULE, |
| 2167 | .name = "reiserfs", |
| 2168 | .get_sb = get_super_block, |
David Howells | edc666e | 2006-10-11 01:22:14 -0700 | [diff] [blame] | 2169 | .kill_sb = reiserfs_kill_sb, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2170 | .fs_flags = FS_REQUIRES_DEV, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2171 | }; |
| 2172 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2173 | MODULE_DESCRIPTION("ReiserFS journaled filesystem"); |
| 2174 | MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>"); |
| 2175 | MODULE_LICENSE("GPL"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2176 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2177 | module_init(init_reiserfs_fs); |
| 2178 | module_exit(exit_reiserfs_fs); |