Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | ** Write ahead logging implementation copyright Chris Mason 2000 |
| 3 | ** |
| 4 | ** The background commits make this code very interelated, and |
| 5 | ** overly complex. I need to rethink things a bit....The major players: |
| 6 | ** |
| 7 | ** journal_begin -- call with the number of blocks you expect to log. |
| 8 | ** If the current transaction is too |
| 9 | ** old, it will block until the current transaction is |
| 10 | ** finished, and then start a new one. |
| 11 | ** Usually, your transaction will get joined in with |
| 12 | ** previous ones for speed. |
| 13 | ** |
| 14 | ** journal_join -- same as journal_begin, but won't block on the current |
| 15 | ** transaction regardless of age. Don't ever call |
| 16 | ** this. Ever. There are only two places it should be |
| 17 | ** called from, and they are both inside this file. |
| 18 | ** |
| 19 | ** journal_mark_dirty -- adds blocks into this transaction. clears any flags |
| 20 | ** that might make them get sent to disk |
| 21 | ** and then marks them BH_JDirty. Puts the buffer head |
| 22 | ** into the current transaction hash. |
| 23 | ** |
| 24 | ** journal_end -- if the current transaction is batchable, it does nothing |
| 25 | ** otherwise, it could do an async/synchronous commit, or |
| 26 | ** a full flush of all log and real blocks in the |
| 27 | ** transaction. |
| 28 | ** |
| 29 | ** flush_old_commits -- if the current transaction is too old, it is ended and |
| 30 | ** commit blocks are sent to disk. Forces commit blocks |
| 31 | ** to disk for all backgrounded commits that have been |
| 32 | ** around too long. |
| 33 | ** -- Note, if you call this as an immediate flush from |
| 34 | ** from within kupdate, it will ignore the immediate flag |
| 35 | */ |
| 36 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <linux/time.h> |
Matthew Wilcox | 6188e10 | 2008-04-18 22:21:05 -0400 | [diff] [blame] | 38 | #include <linux/semaphore.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <linux/vmalloc.h> |
| 40 | #include <linux/reiserfs_fs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <linux/kernel.h> |
| 42 | #include <linux/errno.h> |
| 43 | #include <linux/fcntl.h> |
| 44 | #include <linux/stat.h> |
| 45 | #include <linux/string.h> |
| 46 | #include <linux/smp_lock.h> |
| 47 | #include <linux/buffer_head.h> |
| 48 | #include <linux/workqueue.h> |
| 49 | #include <linux/writeback.h> |
| 50 | #include <linux/blkdev.h> |
Andrew Morton | 3fcfab1 | 2006-10-19 23:28:16 -0700 | [diff] [blame] | 51 | #include <linux/backing-dev.h> |
Jeff Mahoney | 90415de | 2008-07-25 01:46:40 -0700 | [diff] [blame] | 52 | #include <linux/uaccess.h> |
| 53 | |
| 54 | #include <asm/system.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | /* gets a struct reiserfs_journal_list * from a list head */ |
| 57 | #define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \ |
| 58 | j_list)) |
| 59 | #define JOURNAL_WORK_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \ |
| 60 | j_working_list)) |
| 61 | |
| 62 | /* the number of mounted filesystems. This is used to decide when to |
| 63 | ** start and kill the commit workqueue |
| 64 | */ |
| 65 | static int reiserfs_mounted_fs_count; |
| 66 | |
| 67 | static struct workqueue_struct *commit_wq; |
| 68 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 69 | #define JOURNAL_TRANS_HALF 1018 /* must be correct to keep the desc and commit |
| 70 | structs at 4k */ |
| 71 | #define BUFNR 64 /*read ahead */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
| 73 | /* cnode stat bits. Move these into reiserfs_fs.h */ |
| 74 | |
| 75 | #define BLOCK_FREED 2 /* this block was freed, and can't be written. */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 76 | #define BLOCK_FREED_HOLDER 3 /* this block was freed during this transaction, and can't be written */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
| 78 | #define BLOCK_NEEDS_FLUSH 4 /* used in flush_journal_list */ |
| 79 | #define BLOCK_DIRTIED 5 |
| 80 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | /* journal list state bits */ |
| 82 | #define LIST_TOUCHED 1 |
| 83 | #define LIST_DIRTY 2 |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 84 | #define LIST_COMMIT_PENDING 4 /* someone will commit this list */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | |
| 86 | /* flags for do_journal_end */ |
| 87 | #define FLUSH_ALL 1 /* flush commit and real blocks */ |
| 88 | #define COMMIT_NOW 2 /* end and commit this transaction */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 89 | #define WAIT 4 /* wait for the log blocks to hit the disk */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 91 | static int do_journal_end(struct reiserfs_transaction_handle *, |
| 92 | struct super_block *, unsigned long nblocks, |
| 93 | int flags); |
| 94 | static int flush_journal_list(struct super_block *s, |
| 95 | struct reiserfs_journal_list *jl, int flushall); |
| 96 | static int flush_commit_list(struct super_block *s, |
| 97 | struct reiserfs_journal_list *jl, int flushall); |
| 98 | static int can_dirty(struct reiserfs_journal_cnode *cn); |
| 99 | static int journal_join(struct reiserfs_transaction_handle *th, |
| 100 | struct super_block *p_s_sb, unsigned long nblocks); |
| 101 | static int release_journal_dev(struct super_block *super, |
| 102 | struct reiserfs_journal *journal); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | static int dirty_one_transaction(struct super_block *s, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 104 | struct reiserfs_journal_list *jl); |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 105 | static void flush_async_commits(struct work_struct *work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | static void queue_log_writer(struct super_block *s); |
| 107 | |
| 108 | /* values for join in do_journal_begin_r */ |
| 109 | enum { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 110 | JBEGIN_REG = 0, /* regular journal begin */ |
| 111 | JBEGIN_JOIN = 1, /* join the running transaction if at all possible */ |
| 112 | JBEGIN_ABORT = 2, /* called from cleanup code, ignores aborted flag */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | }; |
| 114 | |
| 115 | static int do_journal_begin_r(struct reiserfs_transaction_handle *th, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 116 | struct super_block *p_s_sb, |
| 117 | unsigned long nblocks, int join); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 119 | static void init_journal_hash(struct super_block *p_s_sb) |
| 120 | { |
| 121 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
| 122 | memset(journal->j_hash_table, 0, |
| 123 | JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | /* |
| 127 | ** clears BH_Dirty and sticks the buffer on the clean list. Called because I can't allow refile_buffer to |
| 128 | ** make schedule happen after I've freed a block. Look at remove_from_transaction and journal_mark_freed for |
| 129 | ** more details. |
| 130 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 131 | static int reiserfs_clean_and_file_buffer(struct buffer_head *bh) |
| 132 | { |
| 133 | if (bh) { |
| 134 | clear_buffer_dirty(bh); |
| 135 | clear_buffer_journal_test(bh); |
| 136 | } |
| 137 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | } |
| 139 | |
| 140 | static void disable_barrier(struct super_block *s) |
| 141 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 142 | REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_BARRIER_FLUSH); |
| 143 | printk("reiserfs: disabling flush barriers on %s\n", |
| 144 | reiserfs_bdevname(s)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | } |
| 146 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 147 | static struct reiserfs_bitmap_node *allocate_bitmap_node(struct super_block |
| 148 | *p_s_sb) |
| 149 | { |
| 150 | struct reiserfs_bitmap_node *bn; |
| 151 | static int id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | |
Pekka Enberg | d739b42 | 2006-02-01 03:06:43 -0800 | [diff] [blame] | 153 | bn = kmalloc(sizeof(struct reiserfs_bitmap_node), GFP_NOFS); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 154 | if (!bn) { |
| 155 | return NULL; |
| 156 | } |
Pekka Enberg | d739b42 | 2006-02-01 03:06:43 -0800 | [diff] [blame] | 157 | bn->data = kzalloc(p_s_sb->s_blocksize, GFP_NOFS); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 158 | if (!bn->data) { |
Pekka Enberg | d739b42 | 2006-02-01 03:06:43 -0800 | [diff] [blame] | 159 | kfree(bn); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 160 | return NULL; |
| 161 | } |
| 162 | bn->id = id++; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 163 | INIT_LIST_HEAD(&bn->list); |
| 164 | return bn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | } |
| 166 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 167 | static struct reiserfs_bitmap_node *get_bitmap_node(struct super_block *p_s_sb) |
| 168 | { |
| 169 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
| 170 | struct reiserfs_bitmap_node *bn = NULL; |
| 171 | struct list_head *entry = journal->j_bitmap_nodes.next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 173 | journal->j_used_bitmap_nodes++; |
| 174 | repeat: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 176 | if (entry != &journal->j_bitmap_nodes) { |
| 177 | bn = list_entry(entry, struct reiserfs_bitmap_node, list); |
| 178 | list_del(entry); |
| 179 | memset(bn->data, 0, p_s_sb->s_blocksize); |
| 180 | journal->j_free_bitmap_nodes--; |
| 181 | return bn; |
| 182 | } |
| 183 | bn = allocate_bitmap_node(p_s_sb); |
| 184 | if (!bn) { |
| 185 | yield(); |
| 186 | goto repeat; |
| 187 | } |
| 188 | return bn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | } |
| 190 | static inline void free_bitmap_node(struct super_block *p_s_sb, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 191 | struct reiserfs_bitmap_node *bn) |
| 192 | { |
| 193 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
| 194 | journal->j_used_bitmap_nodes--; |
| 195 | if (journal->j_free_bitmap_nodes > REISERFS_MAX_BITMAP_NODES) { |
Pekka Enberg | d739b42 | 2006-02-01 03:06:43 -0800 | [diff] [blame] | 196 | kfree(bn->data); |
| 197 | kfree(bn); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 198 | } else { |
| 199 | list_add(&bn->list, &journal->j_bitmap_nodes); |
| 200 | journal->j_free_bitmap_nodes++; |
| 201 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | } |
| 203 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 204 | static void allocate_bitmap_nodes(struct super_block *p_s_sb) |
| 205 | { |
| 206 | int i; |
| 207 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
| 208 | struct reiserfs_bitmap_node *bn = NULL; |
| 209 | for (i = 0; i < REISERFS_MIN_BITMAP_NODES; i++) { |
| 210 | bn = allocate_bitmap_node(p_s_sb); |
| 211 | if (bn) { |
| 212 | list_add(&bn->list, &journal->j_bitmap_nodes); |
| 213 | journal->j_free_bitmap_nodes++; |
| 214 | } else { |
| 215 | break; // this is ok, we'll try again when more are needed |
| 216 | } |
| 217 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | } |
| 219 | |
Jeff Mahoney | 3ee1667 | 2007-10-18 23:39:25 -0700 | [diff] [blame] | 220 | static int set_bit_in_list_bitmap(struct super_block *p_s_sb, |
| 221 | b_blocknr_t block, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 222 | struct reiserfs_list_bitmap *jb) |
| 223 | { |
Jeff Mahoney | 3ee1667 | 2007-10-18 23:39:25 -0700 | [diff] [blame] | 224 | unsigned int bmap_nr = block / (p_s_sb->s_blocksize << 3); |
| 225 | unsigned int bit_nr = block % (p_s_sb->s_blocksize << 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 227 | if (!jb->bitmaps[bmap_nr]) { |
| 228 | jb->bitmaps[bmap_nr] = get_bitmap_node(p_s_sb); |
| 229 | } |
| 230 | set_bit(bit_nr, (unsigned long *)jb->bitmaps[bmap_nr]->data); |
| 231 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | } |
| 233 | |
| 234 | static void cleanup_bitmap_list(struct super_block *p_s_sb, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 235 | struct reiserfs_list_bitmap *jb) |
| 236 | { |
| 237 | int i; |
| 238 | if (jb->bitmaps == NULL) |
| 239 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | |
Jeff Mahoney | cb680c1 | 2007-10-18 23:39:27 -0700 | [diff] [blame] | 241 | for (i = 0; i < reiserfs_bmap_count(p_s_sb); i++) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 242 | if (jb->bitmaps[i]) { |
| 243 | free_bitmap_node(p_s_sb, jb->bitmaps[i]); |
| 244 | jb->bitmaps[i] = NULL; |
| 245 | } |
| 246 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | } |
| 248 | |
| 249 | /* |
| 250 | ** only call this on FS unmount. |
| 251 | */ |
| 252 | static int free_list_bitmaps(struct super_block *p_s_sb, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 253 | struct reiserfs_list_bitmap *jb_array) |
| 254 | { |
| 255 | int i; |
| 256 | struct reiserfs_list_bitmap *jb; |
| 257 | for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { |
| 258 | jb = jb_array + i; |
| 259 | jb->journal_list = NULL; |
| 260 | cleanup_bitmap_list(p_s_sb, jb); |
| 261 | vfree(jb->bitmaps); |
| 262 | jb->bitmaps = NULL; |
| 263 | } |
| 264 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | } |
| 266 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 267 | static int free_bitmap_nodes(struct super_block *p_s_sb) |
| 268 | { |
| 269 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
| 270 | struct list_head *next = journal->j_bitmap_nodes.next; |
| 271 | struct reiserfs_bitmap_node *bn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 273 | while (next != &journal->j_bitmap_nodes) { |
| 274 | bn = list_entry(next, struct reiserfs_bitmap_node, list); |
| 275 | list_del(next); |
Pekka Enberg | d739b42 | 2006-02-01 03:06:43 -0800 | [diff] [blame] | 276 | kfree(bn->data); |
| 277 | kfree(bn); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 278 | next = journal->j_bitmap_nodes.next; |
| 279 | journal->j_free_bitmap_nodes--; |
| 280 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 282 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | } |
| 284 | |
| 285 | /* |
| 286 | ** get memory for JOURNAL_NUM_BITMAPS worth of bitmaps. |
| 287 | ** jb_array is the array to be filled in. |
| 288 | */ |
| 289 | int reiserfs_allocate_list_bitmaps(struct super_block *p_s_sb, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 290 | struct reiserfs_list_bitmap *jb_array, |
Jeff Mahoney | 3ee1667 | 2007-10-18 23:39:25 -0700 | [diff] [blame] | 291 | unsigned int bmap_nr) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 292 | { |
| 293 | int i; |
| 294 | int failed = 0; |
| 295 | struct reiserfs_list_bitmap *jb; |
| 296 | int mem = bmap_nr * sizeof(struct reiserfs_bitmap_node *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 298 | for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { |
| 299 | jb = jb_array + i; |
| 300 | jb->journal_list = NULL; |
| 301 | jb->bitmaps = vmalloc(mem); |
| 302 | if (!jb->bitmaps) { |
| 303 | reiserfs_warning(p_s_sb, |
| 304 | "clm-2000, unable to allocate bitmaps for journal lists"); |
| 305 | failed = 1; |
| 306 | break; |
| 307 | } |
| 308 | memset(jb->bitmaps, 0, mem); |
| 309 | } |
| 310 | if (failed) { |
| 311 | free_list_bitmaps(p_s_sb, jb_array); |
| 312 | return -1; |
| 313 | } |
| 314 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | } |
| 316 | |
| 317 | /* |
| 318 | ** find an available list bitmap. If you can't find one, flush a commit list |
| 319 | ** and try again |
| 320 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 321 | static struct reiserfs_list_bitmap *get_list_bitmap(struct super_block *p_s_sb, |
| 322 | struct reiserfs_journal_list |
| 323 | *jl) |
| 324 | { |
| 325 | int i, j; |
| 326 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
| 327 | struct reiserfs_list_bitmap *jb = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 329 | for (j = 0; j < (JOURNAL_NUM_BITMAPS * 3); j++) { |
| 330 | i = journal->j_list_bitmap_index; |
| 331 | journal->j_list_bitmap_index = (i + 1) % JOURNAL_NUM_BITMAPS; |
| 332 | jb = journal->j_list_bitmap + i; |
| 333 | if (journal->j_list_bitmap[i].journal_list) { |
| 334 | flush_commit_list(p_s_sb, |
| 335 | journal->j_list_bitmap[i]. |
| 336 | journal_list, 1); |
| 337 | if (!journal->j_list_bitmap[i].journal_list) { |
| 338 | break; |
| 339 | } |
| 340 | } else { |
| 341 | break; |
| 342 | } |
| 343 | } |
| 344 | if (jb->journal_list) { /* double check to make sure if flushed correctly */ |
| 345 | return NULL; |
| 346 | } |
| 347 | jb->journal_list = jl; |
| 348 | return jb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | } |
| 350 | |
| 351 | /* |
| 352 | ** allocates a new chunk of X nodes, and links them all together as a list. |
| 353 | ** Uses the cnode->next and cnode->prev pointers |
| 354 | ** returns NULL on failure |
| 355 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 356 | static struct reiserfs_journal_cnode *allocate_cnodes(int num_cnodes) |
| 357 | { |
| 358 | struct reiserfs_journal_cnode *head; |
| 359 | int i; |
| 360 | if (num_cnodes <= 0) { |
| 361 | return NULL; |
| 362 | } |
| 363 | head = vmalloc(num_cnodes * sizeof(struct reiserfs_journal_cnode)); |
| 364 | if (!head) { |
| 365 | return NULL; |
| 366 | } |
| 367 | memset(head, 0, num_cnodes * sizeof(struct reiserfs_journal_cnode)); |
| 368 | head[0].prev = NULL; |
| 369 | head[0].next = head + 1; |
| 370 | for (i = 1; i < num_cnodes; i++) { |
| 371 | head[i].prev = head + (i - 1); |
| 372 | head[i].next = head + (i + 1); /* if last one, overwrite it after the if */ |
| 373 | } |
| 374 | head[num_cnodes - 1].next = NULL; |
| 375 | return head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | } |
| 377 | |
| 378 | /* |
| 379 | ** pulls a cnode off the free list, or returns NULL on failure |
| 380 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 381 | static struct reiserfs_journal_cnode *get_cnode(struct super_block *p_s_sb) |
| 382 | { |
| 383 | struct reiserfs_journal_cnode *cn; |
| 384 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 386 | reiserfs_check_lock_depth(p_s_sb, "get_cnode"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 388 | if (journal->j_cnode_free <= 0) { |
| 389 | return NULL; |
| 390 | } |
| 391 | journal->j_cnode_used++; |
| 392 | journal->j_cnode_free--; |
| 393 | cn = journal->j_cnode_free_list; |
| 394 | if (!cn) { |
| 395 | return cn; |
| 396 | } |
| 397 | if (cn->next) { |
| 398 | cn->next->prev = NULL; |
| 399 | } |
| 400 | journal->j_cnode_free_list = cn->next; |
| 401 | memset(cn, 0, sizeof(struct reiserfs_journal_cnode)); |
| 402 | return cn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | } |
| 404 | |
| 405 | /* |
| 406 | ** returns a cnode to the free list |
| 407 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 408 | static void free_cnode(struct super_block *p_s_sb, |
| 409 | struct reiserfs_journal_cnode *cn) |
| 410 | { |
| 411 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 413 | reiserfs_check_lock_depth(p_s_sb, "free_cnode"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 415 | journal->j_cnode_used--; |
| 416 | journal->j_cnode_free++; |
| 417 | /* memset(cn, 0, sizeof(struct reiserfs_journal_cnode)) ; */ |
| 418 | cn->next = journal->j_cnode_free_list; |
| 419 | if (journal->j_cnode_free_list) { |
| 420 | journal->j_cnode_free_list->prev = cn; |
| 421 | } |
| 422 | cn->prev = NULL; /* not needed with the memset, but I might kill the memset, and forget to do this */ |
| 423 | journal->j_cnode_free_list = cn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | } |
| 425 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 426 | static void clear_prepared_bits(struct buffer_head *bh) |
| 427 | { |
| 428 | clear_buffer_journal_prepared(bh); |
| 429 | clear_buffer_journal_restore_dirty(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | } |
| 431 | |
| 432 | /* utility function to force a BUG if it is called without the big |
| 433 | ** kernel lock held. caller is the string printed just before calling BUG() |
| 434 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 435 | void reiserfs_check_lock_depth(struct super_block *sb, char *caller) |
| 436 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | #ifdef CONFIG_SMP |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 438 | if (current->lock_depth < 0) { |
| 439 | reiserfs_panic(sb, "%s called without kernel lock held", |
| 440 | caller); |
| 441 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | #else |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 443 | ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | #endif |
| 445 | } |
| 446 | |
| 447 | /* return a cnode with same dev, block number and size in table, or null if not found */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 448 | static inline struct reiserfs_journal_cnode *get_journal_hash_dev(struct |
| 449 | super_block |
| 450 | *sb, |
| 451 | struct |
| 452 | reiserfs_journal_cnode |
| 453 | **table, |
| 454 | long bl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 456 | struct reiserfs_journal_cnode *cn; |
| 457 | cn = journal_hash(table, sb, bl); |
| 458 | while (cn) { |
| 459 | if (cn->blocknr == bl && cn->sb == sb) |
| 460 | return cn; |
| 461 | cn = cn->hnext; |
| 462 | } |
| 463 | return (struct reiserfs_journal_cnode *)0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | /* |
| 467 | ** this actually means 'can this block be reallocated yet?'. If you set search_all, a block can only be allocated |
| 468 | ** if it is not in the current transaction, was not freed by the current transaction, and has no chance of ever |
| 469 | ** being overwritten by a replay after crashing. |
| 470 | ** |
| 471 | ** If you don't set search_all, a block can only be allocated if it is not in the current transaction. Since deleting |
| 472 | ** a block removes it from the current transaction, this case should never happen. If you don't set search_all, make |
| 473 | ** sure you never write the block without logging it. |
| 474 | ** |
| 475 | ** next_zero_bit is a suggestion about the next block to try for find_forward. |
| 476 | ** when bl is rejected because it is set in a journal list bitmap, we search |
| 477 | ** for the next zero bit in the bitmap that rejected bl. Then, we return that |
| 478 | ** through next_zero_bit for find_forward to try. |
| 479 | ** |
| 480 | ** Just because we return something in next_zero_bit does not mean we won't |
| 481 | ** reject it on the next call to reiserfs_in_journal |
| 482 | ** |
| 483 | */ |
| 484 | int reiserfs_in_journal(struct super_block *p_s_sb, |
Jeff Mahoney | 3ee1667 | 2007-10-18 23:39:25 -0700 | [diff] [blame] | 485 | unsigned int bmap_nr, int bit_nr, int search_all, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 486 | b_blocknr_t * next_zero_bit) |
| 487 | { |
| 488 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
| 489 | struct reiserfs_journal_cnode *cn; |
| 490 | struct reiserfs_list_bitmap *jb; |
| 491 | int i; |
| 492 | unsigned long bl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 494 | *next_zero_bit = 0; /* always start this at zero. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 496 | PROC_INFO_INC(p_s_sb, journal.in_journal); |
| 497 | /* If we aren't doing a search_all, this is a metablock, and it will be logged before use. |
| 498 | ** if we crash before the transaction that freed it commits, this transaction won't |
| 499 | ** have committed either, and the block will never be written |
| 500 | */ |
| 501 | if (search_all) { |
| 502 | for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { |
| 503 | PROC_INFO_INC(p_s_sb, journal.in_journal_bitmap); |
| 504 | jb = journal->j_list_bitmap + i; |
| 505 | if (jb->journal_list && jb->bitmaps[bmap_nr] && |
| 506 | test_bit(bit_nr, |
| 507 | (unsigned long *)jb->bitmaps[bmap_nr]-> |
| 508 | data)) { |
| 509 | *next_zero_bit = |
| 510 | find_next_zero_bit((unsigned long *) |
| 511 | (jb->bitmaps[bmap_nr]-> |
| 512 | data), |
| 513 | p_s_sb->s_blocksize << 3, |
| 514 | bit_nr + 1); |
| 515 | return 1; |
| 516 | } |
| 517 | } |
| 518 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 520 | bl = bmap_nr * (p_s_sb->s_blocksize << 3) + bit_nr; |
| 521 | /* is it in any old transactions? */ |
| 522 | if (search_all |
| 523 | && (cn = |
| 524 | get_journal_hash_dev(p_s_sb, journal->j_list_hash_table, bl))) { |
| 525 | return 1; |
| 526 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 528 | /* is it in the current transaction. This should never happen */ |
| 529 | if ((cn = get_journal_hash_dev(p_s_sb, journal->j_hash_table, bl))) { |
| 530 | BUG(); |
| 531 | return 1; |
| 532 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 534 | PROC_INFO_INC(p_s_sb, journal.in_journal_reusable); |
| 535 | /* safe for reuse */ |
| 536 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | } |
| 538 | |
| 539 | /* insert cn into table |
| 540 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 541 | static inline void insert_journal_hash(struct reiserfs_journal_cnode **table, |
| 542 | struct reiserfs_journal_cnode *cn) |
| 543 | { |
| 544 | struct reiserfs_journal_cnode *cn_orig; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 546 | cn_orig = journal_hash(table, cn->sb, cn->blocknr); |
| 547 | cn->hnext = cn_orig; |
| 548 | cn->hprev = NULL; |
| 549 | if (cn_orig) { |
| 550 | cn_orig->hprev = cn; |
| 551 | } |
| 552 | journal_hash(table, cn->sb, cn->blocknr) = cn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | } |
| 554 | |
| 555 | /* lock the current transaction */ |
Jesper Juhl | 77933d7 | 2005-07-27 11:46:09 -0700 | [diff] [blame] | 556 | static inline void lock_journal(struct super_block *p_s_sb) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 557 | { |
| 558 | PROC_INFO_INC(p_s_sb, journal.lock_journal); |
Jeff Mahoney | f68215c | 2008-07-25 01:46:38 -0700 | [diff] [blame] | 559 | mutex_lock(&SB_JOURNAL(p_s_sb)->j_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | } |
| 561 | |
| 562 | /* unlock the current transaction */ |
Jesper Juhl | 77933d7 | 2005-07-27 11:46:09 -0700 | [diff] [blame] | 563 | static inline void unlock_journal(struct super_block *p_s_sb) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 564 | { |
Jeff Mahoney | f68215c | 2008-07-25 01:46:38 -0700 | [diff] [blame] | 565 | mutex_unlock(&SB_JOURNAL(p_s_sb)->j_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | } |
| 567 | |
| 568 | static inline void get_journal_list(struct reiserfs_journal_list *jl) |
| 569 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 570 | jl->j_refcount++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | } |
| 572 | |
| 573 | static inline void put_journal_list(struct super_block *s, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 574 | struct reiserfs_journal_list *jl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 576 | if (jl->j_refcount < 1) { |
| 577 | reiserfs_panic(s, "trans id %lu, refcount at %d", |
| 578 | jl->j_trans_id, jl->j_refcount); |
| 579 | } |
| 580 | if (--jl->j_refcount == 0) |
Pekka Enberg | d739b42 | 2006-02-01 03:06:43 -0800 | [diff] [blame] | 581 | kfree(jl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | } |
| 583 | |
| 584 | /* |
| 585 | ** this used to be much more involved, and I'm keeping it just in case things get ugly again. |
| 586 | ** it gets called by flush_commit_list, and cleans up any data stored about blocks freed during a |
| 587 | ** transaction. |
| 588 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 589 | static void cleanup_freed_for_journal_list(struct super_block *p_s_sb, |
| 590 | struct reiserfs_journal_list *jl) |
| 591 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 593 | struct reiserfs_list_bitmap *jb = jl->j_list_bitmap; |
| 594 | if (jb) { |
| 595 | cleanup_bitmap_list(p_s_sb, jb); |
| 596 | } |
| 597 | jl->j_list_bitmap->journal_list = NULL; |
| 598 | jl->j_list_bitmap = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | } |
| 600 | |
| 601 | static int journal_list_still_alive(struct super_block *s, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 602 | unsigned long trans_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 604 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
| 605 | struct list_head *entry = &journal->j_journal_list; |
| 606 | struct reiserfs_journal_list *jl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 608 | if (!list_empty(entry)) { |
| 609 | jl = JOURNAL_LIST_ENTRY(entry->next); |
| 610 | if (jl->j_trans_id <= trans_id) { |
| 611 | return 1; |
| 612 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 614 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | } |
| 616 | |
Chris Mason | 398c95b | 2007-10-16 23:29:44 -0700 | [diff] [blame] | 617 | /* |
| 618 | * If page->mapping was null, we failed to truncate this page for |
| 619 | * some reason. Most likely because it was truncated after being |
| 620 | * logged via data=journal. |
| 621 | * |
| 622 | * This does a check to see if the buffer belongs to one of these |
| 623 | * lost pages before doing the final put_bh. If page->mapping was |
| 624 | * null, it tries to free buffers on the page, which should make the |
| 625 | * final page_cache_release drop the page from the lru. |
| 626 | */ |
| 627 | static void release_buffer_page(struct buffer_head *bh) |
| 628 | { |
| 629 | struct page *page = bh->b_page; |
| 630 | if (!page->mapping && !TestSetPageLocked(page)) { |
| 631 | page_cache_get(page); |
| 632 | put_bh(bh); |
| 633 | if (!page->mapping) |
| 634 | try_to_free_buffers(page); |
| 635 | unlock_page(page); |
| 636 | page_cache_release(page); |
| 637 | } else { |
| 638 | put_bh(bh); |
| 639 | } |
| 640 | } |
| 641 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 642 | static void reiserfs_end_buffer_io_sync(struct buffer_head *bh, int uptodate) |
| 643 | { |
| 644 | char b[BDEVNAME_SIZE]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 646 | if (buffer_journaled(bh)) { |
| 647 | reiserfs_warning(NULL, |
| 648 | "clm-2084: pinned buffer %lu:%s sent to disk", |
| 649 | bh->b_blocknr, bdevname(bh->b_bdev, b)); |
| 650 | } |
| 651 | if (uptodate) |
| 652 | set_buffer_uptodate(bh); |
| 653 | else |
| 654 | clear_buffer_uptodate(bh); |
Chris Mason | 398c95b | 2007-10-16 23:29:44 -0700 | [diff] [blame] | 655 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 656 | unlock_buffer(bh); |
Chris Mason | 398c95b | 2007-10-16 23:29:44 -0700 | [diff] [blame] | 657 | release_buffer_page(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | } |
| 659 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 660 | static void reiserfs_end_ordered_io(struct buffer_head *bh, int uptodate) |
| 661 | { |
| 662 | if (uptodate) |
| 663 | set_buffer_uptodate(bh); |
| 664 | else |
| 665 | clear_buffer_uptodate(bh); |
| 666 | unlock_buffer(bh); |
| 667 | put_bh(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | } |
| 669 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 670 | static void submit_logged_buffer(struct buffer_head *bh) |
| 671 | { |
| 672 | get_bh(bh); |
| 673 | bh->b_end_io = reiserfs_end_buffer_io_sync; |
| 674 | clear_buffer_journal_new(bh); |
| 675 | clear_buffer_dirty(bh); |
| 676 | if (!test_clear_buffer_journal_test(bh)) |
| 677 | BUG(); |
| 678 | if (!buffer_uptodate(bh)) |
| 679 | BUG(); |
| 680 | submit_bh(WRITE, bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | } |
| 682 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 683 | static void submit_ordered_buffer(struct buffer_head *bh) |
| 684 | { |
| 685 | get_bh(bh); |
| 686 | bh->b_end_io = reiserfs_end_ordered_io; |
| 687 | clear_buffer_dirty(bh); |
| 688 | if (!buffer_uptodate(bh)) |
| 689 | BUG(); |
| 690 | submit_bh(WRITE, bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | } |
| 692 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 693 | static int submit_barrier_buffer(struct buffer_head *bh) |
| 694 | { |
| 695 | get_bh(bh); |
| 696 | bh->b_end_io = reiserfs_end_ordered_io; |
| 697 | clear_buffer_dirty(bh); |
| 698 | if (!buffer_uptodate(bh)) |
| 699 | BUG(); |
| 700 | return submit_bh(WRITE_BARRIER, bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | } |
| 702 | |
| 703 | static void check_barrier_completion(struct super_block *s, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 704 | struct buffer_head *bh) |
| 705 | { |
| 706 | if (buffer_eopnotsupp(bh)) { |
| 707 | clear_buffer_eopnotsupp(bh); |
| 708 | disable_barrier(s); |
| 709 | set_buffer_uptodate(bh); |
| 710 | set_buffer_dirty(bh); |
| 711 | sync_dirty_buffer(bh); |
| 712 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | } |
| 714 | |
| 715 | #define CHUNK_SIZE 32 |
| 716 | struct buffer_chunk { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 717 | struct buffer_head *bh[CHUNK_SIZE]; |
| 718 | int nr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | }; |
| 720 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 721 | static void write_chunk(struct buffer_chunk *chunk) |
| 722 | { |
| 723 | int i; |
| 724 | get_fs_excl(); |
| 725 | for (i = 0; i < chunk->nr; i++) { |
| 726 | submit_logged_buffer(chunk->bh[i]); |
| 727 | } |
| 728 | chunk->nr = 0; |
| 729 | put_fs_excl(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | } |
| 731 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 732 | static void write_ordered_chunk(struct buffer_chunk *chunk) |
| 733 | { |
| 734 | int i; |
| 735 | get_fs_excl(); |
| 736 | for (i = 0; i < chunk->nr; i++) { |
| 737 | submit_ordered_buffer(chunk->bh[i]); |
| 738 | } |
| 739 | chunk->nr = 0; |
| 740 | put_fs_excl(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | } |
| 742 | |
| 743 | static int add_to_chunk(struct buffer_chunk *chunk, struct buffer_head *bh, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 744 | spinlock_t * lock, void (fn) (struct buffer_chunk *)) |
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 | int ret = 0; |
Eric Sesterhenn | 14a6144 | 2006-10-03 23:36:38 +0200 | [diff] [blame] | 747 | BUG_ON(chunk->nr >= CHUNK_SIZE); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 748 | chunk->bh[chunk->nr++] = bh; |
| 749 | if (chunk->nr >= CHUNK_SIZE) { |
| 750 | ret = 1; |
| 751 | if (lock) |
| 752 | spin_unlock(lock); |
| 753 | fn(chunk); |
| 754 | if (lock) |
| 755 | spin_lock(lock); |
| 756 | } |
| 757 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | } |
| 759 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | static atomic_t nr_reiserfs_jh = ATOMIC_INIT(0); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 761 | static struct reiserfs_jh *alloc_jh(void) |
| 762 | { |
| 763 | struct reiserfs_jh *jh; |
| 764 | while (1) { |
| 765 | jh = kmalloc(sizeof(*jh), GFP_NOFS); |
| 766 | if (jh) { |
| 767 | atomic_inc(&nr_reiserfs_jh); |
| 768 | return jh; |
| 769 | } |
| 770 | yield(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | } |
| 773 | |
| 774 | /* |
| 775 | * we want to free the jh when the buffer has been written |
| 776 | * and waited on |
| 777 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 778 | void reiserfs_free_jh(struct buffer_head *bh) |
| 779 | { |
| 780 | struct reiserfs_jh *jh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 782 | jh = bh->b_private; |
| 783 | if (jh) { |
| 784 | bh->b_private = NULL; |
| 785 | jh->bh = NULL; |
| 786 | list_del_init(&jh->list); |
| 787 | kfree(jh); |
| 788 | if (atomic_read(&nr_reiserfs_jh) <= 0) |
| 789 | BUG(); |
| 790 | atomic_dec(&nr_reiserfs_jh); |
| 791 | put_bh(bh); |
| 792 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | } |
| 794 | |
| 795 | static inline int __add_jh(struct reiserfs_journal *j, struct buffer_head *bh, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 796 | int tail) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 798 | struct reiserfs_jh *jh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 800 | if (bh->b_private) { |
| 801 | spin_lock(&j->j_dirty_buffers_lock); |
| 802 | if (!bh->b_private) { |
| 803 | spin_unlock(&j->j_dirty_buffers_lock); |
| 804 | goto no_jh; |
| 805 | } |
| 806 | jh = bh->b_private; |
| 807 | list_del_init(&jh->list); |
| 808 | } else { |
| 809 | no_jh: |
| 810 | get_bh(bh); |
| 811 | jh = alloc_jh(); |
| 812 | spin_lock(&j->j_dirty_buffers_lock); |
| 813 | /* buffer must be locked for __add_jh, should be able to have |
| 814 | * two adds at the same time |
| 815 | */ |
Eric Sesterhenn | 14a6144 | 2006-10-03 23:36:38 +0200 | [diff] [blame] | 816 | BUG_ON(bh->b_private); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 817 | jh->bh = bh; |
| 818 | bh->b_private = jh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 820 | jh->jl = j->j_current_jl; |
| 821 | if (tail) |
| 822 | list_add_tail(&jh->list, &jh->jl->j_tail_bh_list); |
| 823 | else { |
| 824 | list_add_tail(&jh->list, &jh->jl->j_bh_list); |
| 825 | } |
| 826 | spin_unlock(&j->j_dirty_buffers_lock); |
| 827 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | } |
| 829 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 830 | int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh) |
| 831 | { |
| 832 | return __add_jh(SB_JOURNAL(inode->i_sb), bh, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 834 | int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh) |
| 835 | { |
| 836 | return __add_jh(SB_JOURNAL(inode->i_sb), bh, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | } |
| 838 | |
| 839 | #define JH_ENTRY(l) list_entry((l), struct reiserfs_jh, list) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 840 | static int write_ordered_buffers(spinlock_t * lock, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | struct reiserfs_journal *j, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 842 | struct reiserfs_journal_list *jl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | struct list_head *list) |
| 844 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 845 | struct buffer_head *bh; |
| 846 | struct reiserfs_jh *jh; |
| 847 | int ret = j->j_errno; |
| 848 | struct buffer_chunk chunk; |
| 849 | struct list_head tmp; |
| 850 | INIT_LIST_HEAD(&tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 852 | chunk.nr = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | spin_lock(lock); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 854 | while (!list_empty(list)) { |
| 855 | jh = JH_ENTRY(list->next); |
| 856 | bh = jh->bh; |
| 857 | get_bh(bh); |
| 858 | if (test_set_buffer_locked(bh)) { |
| 859 | if (!buffer_dirty(bh)) { |
Akinobu Mita | f116629 | 2006-06-26 00:24:46 -0700 | [diff] [blame] | 860 | list_move(&jh->list, &tmp); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 861 | goto loop_next; |
| 862 | } |
| 863 | spin_unlock(lock); |
| 864 | if (chunk.nr) |
| 865 | write_ordered_chunk(&chunk); |
| 866 | wait_on_buffer(bh); |
| 867 | cond_resched(); |
| 868 | spin_lock(lock); |
| 869 | goto loop_next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | } |
Chris Mason | 3d4492f | 2006-02-01 03:06:49 -0800 | [diff] [blame] | 871 | /* in theory, dirty non-uptodate buffers should never get here, |
| 872 | * but the upper layer io error paths still have a few quirks. |
| 873 | * Handle them here as gracefully as we can |
| 874 | */ |
| 875 | if (!buffer_uptodate(bh) && buffer_dirty(bh)) { |
| 876 | clear_buffer_dirty(bh); |
| 877 | ret = -EIO; |
| 878 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 879 | if (buffer_dirty(bh)) { |
Akinobu Mita | f116629 | 2006-06-26 00:24:46 -0700 | [diff] [blame] | 880 | list_move(&jh->list, &tmp); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 881 | add_to_chunk(&chunk, bh, lock, write_ordered_chunk); |
| 882 | } else { |
| 883 | reiserfs_free_jh(bh); |
| 884 | unlock_buffer(bh); |
| 885 | } |
| 886 | loop_next: |
| 887 | put_bh(bh); |
| 888 | cond_resched_lock(lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 890 | if (chunk.nr) { |
| 891 | spin_unlock(lock); |
| 892 | write_ordered_chunk(&chunk); |
| 893 | spin_lock(lock); |
| 894 | } |
| 895 | while (!list_empty(&tmp)) { |
| 896 | jh = JH_ENTRY(tmp.prev); |
| 897 | bh = jh->bh; |
| 898 | get_bh(bh); |
| 899 | reiserfs_free_jh(bh); |
| 900 | |
| 901 | if (buffer_locked(bh)) { |
| 902 | spin_unlock(lock); |
| 903 | wait_on_buffer(bh); |
| 904 | spin_lock(lock); |
| 905 | } |
| 906 | if (!buffer_uptodate(bh)) { |
| 907 | ret = -EIO; |
| 908 | } |
Chris Mason | d62b1b8 | 2006-02-01 03:06:47 -0800 | [diff] [blame] | 909 | /* ugly interaction with invalidatepage here. |
| 910 | * reiserfs_invalidate_page will pin any buffer that has a valid |
| 911 | * journal head from an older transaction. If someone else sets |
| 912 | * our buffer dirty after we write it in the first loop, and |
| 913 | * then someone truncates the page away, nobody will ever write |
| 914 | * the buffer. We're safe if we write the page one last time |
| 915 | * after freeing the journal header. |
| 916 | */ |
| 917 | if (buffer_dirty(bh) && unlikely(bh->b_page->mapping == NULL)) { |
| 918 | spin_unlock(lock); |
| 919 | ll_rw_block(WRITE, 1, &bh); |
| 920 | spin_lock(lock); |
| 921 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 922 | put_bh(bh); |
| 923 | cond_resched_lock(lock); |
| 924 | } |
| 925 | spin_unlock(lock); |
| 926 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 928 | |
| 929 | static int flush_older_commits(struct super_block *s, |
| 930 | struct reiserfs_journal_list *jl) |
| 931 | { |
| 932 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
| 933 | struct reiserfs_journal_list *other_jl; |
| 934 | struct reiserfs_journal_list *first_jl; |
| 935 | struct list_head *entry; |
| 936 | unsigned long trans_id = jl->j_trans_id; |
| 937 | unsigned long other_trans_id; |
| 938 | unsigned long first_trans_id; |
| 939 | |
| 940 | find_first: |
| 941 | /* |
| 942 | * first we walk backwards to find the oldest uncommitted transation |
| 943 | */ |
| 944 | first_jl = jl; |
| 945 | entry = jl->j_list.prev; |
| 946 | while (1) { |
| 947 | other_jl = JOURNAL_LIST_ENTRY(entry); |
| 948 | if (entry == &journal->j_journal_list || |
| 949 | atomic_read(&other_jl->j_older_commits_done)) |
| 950 | break; |
| 951 | |
| 952 | first_jl = other_jl; |
| 953 | entry = other_jl->j_list.prev; |
| 954 | } |
| 955 | |
| 956 | /* if we didn't find any older uncommitted transactions, return now */ |
| 957 | if (first_jl == jl) { |
| 958 | return 0; |
| 959 | } |
| 960 | |
| 961 | first_trans_id = first_jl->j_trans_id; |
| 962 | |
| 963 | entry = &first_jl->j_list; |
| 964 | while (1) { |
| 965 | other_jl = JOURNAL_LIST_ENTRY(entry); |
| 966 | other_trans_id = other_jl->j_trans_id; |
| 967 | |
| 968 | if (other_trans_id < trans_id) { |
| 969 | if (atomic_read(&other_jl->j_commit_left) != 0) { |
| 970 | flush_commit_list(s, other_jl, 0); |
| 971 | |
| 972 | /* list we were called with is gone, return */ |
| 973 | if (!journal_list_still_alive(s, trans_id)) |
| 974 | return 1; |
| 975 | |
| 976 | /* the one we just flushed is gone, this means all |
| 977 | * older lists are also gone, so first_jl is no longer |
| 978 | * valid either. Go back to the beginning. |
| 979 | */ |
| 980 | if (!journal_list_still_alive |
| 981 | (s, other_trans_id)) { |
| 982 | goto find_first; |
| 983 | } |
| 984 | } |
| 985 | entry = entry->next; |
| 986 | if (entry == &journal->j_journal_list) |
| 987 | return 0; |
| 988 | } else { |
| 989 | return 0; |
| 990 | } |
| 991 | } |
| 992 | return 0; |
| 993 | } |
Adrian Bunk | deba0f4 | 2007-10-16 23:26:03 -0700 | [diff] [blame] | 994 | |
| 995 | static int reiserfs_async_progress_wait(struct super_block *s) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 996 | { |
| 997 | DEFINE_WAIT(wait); |
| 998 | struct reiserfs_journal *j = SB_JOURNAL(s); |
| 999 | if (atomic_read(&j->j_async_throttle)) |
Andrew Morton | 3fcfab1 | 2006-10-19 23:28:16 -0700 | [diff] [blame] | 1000 | congestion_wait(WRITE, HZ / 10); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1001 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | } |
| 1003 | |
| 1004 | /* |
| 1005 | ** if this journal list still has commit blocks unflushed, send them to disk. |
| 1006 | ** |
| 1007 | ** log areas must be flushed in order (transaction 2 can't commit before transaction 1) |
| 1008 | ** Before the commit block can by written, every other log block must be safely on disk |
| 1009 | ** |
| 1010 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1011 | static int flush_commit_list(struct super_block *s, |
| 1012 | struct reiserfs_journal_list *jl, int flushall) |
| 1013 | { |
| 1014 | int i; |
Jeff Mahoney | 3ee1667 | 2007-10-18 23:39:25 -0700 | [diff] [blame] | 1015 | b_blocknr_t bn; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1016 | struct buffer_head *tbh = NULL; |
| 1017 | unsigned long trans_id = jl->j_trans_id; |
| 1018 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
| 1019 | int barrier = 0; |
| 1020 | int retval = 0; |
Chris Mason | e0e851c | 2006-02-01 03:06:49 -0800 | [diff] [blame] | 1021 | int write_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1023 | reiserfs_check_lock_depth(s, "flush_commit_list"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1025 | if (atomic_read(&jl->j_older_commits_done)) { |
| 1026 | return 0; |
| 1027 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1029 | get_fs_excl(); |
Jens Axboe | 22e2c50 | 2005-06-27 10:55:12 +0200 | [diff] [blame] | 1030 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1031 | /* before we can put our commit blocks on disk, we have to make sure everyone older than |
| 1032 | ** us is on disk too |
| 1033 | */ |
| 1034 | BUG_ON(jl->j_len <= 0); |
| 1035 | BUG_ON(trans_id == journal->j_trans_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1037 | get_journal_list(jl); |
| 1038 | if (flushall) { |
| 1039 | if (flush_older_commits(s, jl) == 1) { |
| 1040 | /* list disappeared during flush_older_commits. return */ |
| 1041 | goto put_jl; |
| 1042 | } |
| 1043 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1045 | /* make sure nobody is trying to flush this one at the same time */ |
Jeff Mahoney | 90415de | 2008-07-25 01:46:40 -0700 | [diff] [blame] | 1046 | mutex_lock(&jl->j_commit_mutex); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1047 | if (!journal_list_still_alive(s, trans_id)) { |
Jeff Mahoney | 90415de | 2008-07-25 01:46:40 -0700 | [diff] [blame] | 1048 | mutex_unlock(&jl->j_commit_mutex); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1049 | goto put_jl; |
| 1050 | } |
| 1051 | BUG_ON(jl->j_trans_id == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1053 | /* this commit is done, exit */ |
| 1054 | if (atomic_read(&(jl->j_commit_left)) <= 0) { |
| 1055 | if (flushall) { |
| 1056 | atomic_set(&(jl->j_older_commits_done), 1); |
| 1057 | } |
Jeff Mahoney | 90415de | 2008-07-25 01:46:40 -0700 | [diff] [blame] | 1058 | mutex_unlock(&jl->j_commit_mutex); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1059 | goto put_jl; |
| 1060 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1062 | if (!list_empty(&jl->j_bh_list)) { |
Chris Mason | 3d4492f | 2006-02-01 03:06:49 -0800 | [diff] [blame] | 1063 | int ret; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1064 | unlock_kernel(); |
Chris Mason | 3d4492f | 2006-02-01 03:06:49 -0800 | [diff] [blame] | 1065 | ret = write_ordered_buffers(&journal->j_dirty_buffers_lock, |
| 1066 | journal, jl, &jl->j_bh_list); |
| 1067 | if (ret < 0 && retval == 0) |
| 1068 | retval = ret; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1069 | lock_kernel(); |
| 1070 | } |
| 1071 | BUG_ON(!list_empty(&jl->j_bh_list)); |
| 1072 | /* |
| 1073 | * for the description block and all the log blocks, submit any buffers |
Chris Mason | e0e851c | 2006-02-01 03:06:49 -0800 | [diff] [blame] | 1074 | * that haven't already reached the disk. Try to write at least 256 |
| 1075 | * log blocks. later on, we will only wait on blocks that correspond |
| 1076 | * to this transaction, but while we're unplugging we might as well |
| 1077 | * get a chunk of data on there. |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1078 | */ |
| 1079 | atomic_inc(&journal->j_async_throttle); |
Chris Mason | e0e851c | 2006-02-01 03:06:49 -0800 | [diff] [blame] | 1080 | write_len = jl->j_len + 1; |
| 1081 | if (write_len < 256) |
| 1082 | write_len = 256; |
| 1083 | for (i = 0 ; i < write_len ; i++) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1084 | bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + (jl->j_start + i) % |
| 1085 | SB_ONDISK_JOURNAL_SIZE(s); |
| 1086 | tbh = journal_find_get_block(s, bn); |
Chris Mason | e0e851c | 2006-02-01 03:06:49 -0800 | [diff] [blame] | 1087 | if (tbh) { |
| 1088 | if (buffer_dirty(tbh)) |
| 1089 | ll_rw_block(WRITE, 1, &tbh) ; |
| 1090 | put_bh(tbh) ; |
| 1091 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1092 | } |
| 1093 | atomic_dec(&journal->j_async_throttle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | |
Jeff Mahoney | 5d5e8156 | 2005-12-14 14:38:36 -0500 | [diff] [blame] | 1095 | /* We're skipping the commit if there's an error */ |
| 1096 | if (retval || reiserfs_is_journal_aborted(journal)) |
| 1097 | barrier = 0; |
| 1098 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1099 | /* wait on everything written so far before writing the commit |
| 1100 | * if we are in barrier mode, send the commit down now |
| 1101 | */ |
| 1102 | barrier = reiserfs_barrier_flush(s); |
| 1103 | if (barrier) { |
| 1104 | int ret; |
| 1105 | lock_buffer(jl->j_commit_bh); |
| 1106 | ret = submit_barrier_buffer(jl->j_commit_bh); |
| 1107 | if (ret == -EOPNOTSUPP) { |
| 1108 | set_buffer_uptodate(jl->j_commit_bh); |
| 1109 | disable_barrier(s); |
| 1110 | barrier = 0; |
| 1111 | } |
| 1112 | } |
| 1113 | for (i = 0; i < (jl->j_len + 1); i++) { |
| 1114 | bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + |
| 1115 | (jl->j_start + i) % SB_ONDISK_JOURNAL_SIZE(s); |
| 1116 | tbh = journal_find_get_block(s, bn); |
| 1117 | wait_on_buffer(tbh); |
| 1118 | // since we're using ll_rw_blk above, it might have skipped over |
| 1119 | // a locked buffer. Double check here |
| 1120 | // |
| 1121 | if (buffer_dirty(tbh)) /* redundant, sync_dirty_buffer() checks */ |
| 1122 | sync_dirty_buffer(tbh); |
| 1123 | if (unlikely(!buffer_uptodate(tbh))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | #ifdef CONFIG_REISERFS_CHECK |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1125 | reiserfs_warning(s, "journal-601, buffer write failed"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | #endif |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1127 | retval = -EIO; |
| 1128 | } |
| 1129 | put_bh(tbh); /* once for journal_find_get_block */ |
| 1130 | put_bh(tbh); /* once due to original getblk in do_journal_end */ |
| 1131 | atomic_dec(&(jl->j_commit_left)); |
| 1132 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1134 | BUG_ON(atomic_read(&(jl->j_commit_left)) != 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1136 | if (!barrier) { |
Jeff Mahoney | 5d5e8156 | 2005-12-14 14:38:36 -0500 | [diff] [blame] | 1137 | /* If there was a write error in the journal - we can't commit |
| 1138 | * this transaction - it will be invalid and, if successful, |
Robert P. J. Day | beb7dd8 | 2007-05-09 07:14:03 +0200 | [diff] [blame] | 1139 | * will just end up propagating the write error out to |
Jeff Mahoney | 5d5e8156 | 2005-12-14 14:38:36 -0500 | [diff] [blame] | 1140 | * the file system. */ |
| 1141 | if (likely(!retval && !reiserfs_is_journal_aborted (journal))) { |
| 1142 | if (buffer_dirty(jl->j_commit_bh)) |
| 1143 | BUG(); |
| 1144 | mark_buffer_dirty(jl->j_commit_bh) ; |
| 1145 | sync_dirty_buffer(jl->j_commit_bh) ; |
| 1146 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1147 | } else |
| 1148 | wait_on_buffer(jl->j_commit_bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1150 | check_barrier_completion(s, jl->j_commit_bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1152 | /* If there was a write error in the journal - we can't commit this |
| 1153 | * transaction - it will be invalid and, if successful, will just end |
Robert P. J. Day | beb7dd8 | 2007-05-09 07:14:03 +0200 | [diff] [blame] | 1154 | * up propagating the write error out to the filesystem. */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1155 | if (unlikely(!buffer_uptodate(jl->j_commit_bh))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | #ifdef CONFIG_REISERFS_CHECK |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1157 | reiserfs_warning(s, "journal-615: buffer write failed"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | #endif |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1159 | retval = -EIO; |
| 1160 | } |
| 1161 | bforget(jl->j_commit_bh); |
| 1162 | if (journal->j_last_commit_id != 0 && |
| 1163 | (jl->j_trans_id - journal->j_last_commit_id) != 1) { |
| 1164 | reiserfs_warning(s, "clm-2200: last commit %lu, current %lu", |
| 1165 | journal->j_last_commit_id, jl->j_trans_id); |
| 1166 | } |
| 1167 | journal->j_last_commit_id = jl->j_trans_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1168 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1169 | /* now, every commit block is on the disk. It is safe to allow blocks freed during this transaction to be reallocated */ |
| 1170 | cleanup_freed_for_journal_list(s, jl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1172 | retval = retval ? retval : journal->j_errno; |
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 | /* mark the metadata dirty */ |
| 1175 | if (!retval) |
| 1176 | dirty_one_transaction(s, jl); |
| 1177 | atomic_dec(&(jl->j_commit_left)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1179 | if (flushall) { |
| 1180 | atomic_set(&(jl->j_older_commits_done), 1); |
| 1181 | } |
Jeff Mahoney | 90415de | 2008-07-25 01:46:40 -0700 | [diff] [blame] | 1182 | mutex_unlock(&jl->j_commit_mutex); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1183 | put_jl: |
| 1184 | put_journal_list(s, jl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1186 | if (retval) |
| 1187 | reiserfs_abort(s, retval, "Journal write error in %s", |
Harvey Harrison | fbe5498 | 2008-04-28 02:16:22 -0700 | [diff] [blame] | 1188 | __func__); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1189 | put_fs_excl(); |
| 1190 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | } |
| 1192 | |
| 1193 | /* |
| 1194 | ** flush_journal_list frequently needs to find a newer transaction for a given block. This does that, or |
| 1195 | ** returns NULL if it can't find anything |
| 1196 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1197 | static struct reiserfs_journal_list *find_newer_jl_for_cn(struct |
| 1198 | reiserfs_journal_cnode |
| 1199 | *cn) |
| 1200 | { |
| 1201 | struct super_block *sb = cn->sb; |
| 1202 | b_blocknr_t blocknr = cn->blocknr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1204 | cn = cn->hprev; |
| 1205 | while (cn) { |
| 1206 | if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist) { |
| 1207 | return cn->jlist; |
| 1208 | } |
| 1209 | cn = cn->hprev; |
| 1210 | } |
| 1211 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | } |
| 1213 | |
Chris Mason | a317202 | 2006-09-29 01:59:56 -0700 | [diff] [blame] | 1214 | static int newer_jl_done(struct reiserfs_journal_cnode *cn) |
| 1215 | { |
| 1216 | struct super_block *sb = cn->sb; |
| 1217 | b_blocknr_t blocknr = cn->blocknr; |
| 1218 | |
| 1219 | cn = cn->hprev; |
| 1220 | while (cn) { |
| 1221 | if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist && |
| 1222 | atomic_read(&cn->jlist->j_commit_left) != 0) |
| 1223 | return 0; |
| 1224 | cn = cn->hprev; |
| 1225 | } |
| 1226 | return 1; |
| 1227 | } |
| 1228 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1229 | static void remove_journal_hash(struct super_block *, |
| 1230 | struct reiserfs_journal_cnode **, |
| 1231 | struct reiserfs_journal_list *, unsigned long, |
| 1232 | int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | |
| 1234 | /* |
| 1235 | ** once all the real blocks have been flushed, it is safe to remove them from the |
| 1236 | ** journal list for this transaction. Aside from freeing the cnode, this also allows the |
| 1237 | ** block to be reallocated for data blocks if it had been deleted. |
| 1238 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1239 | static void remove_all_from_journal_list(struct super_block *p_s_sb, |
| 1240 | struct reiserfs_journal_list *jl, |
| 1241 | int debug) |
| 1242 | { |
| 1243 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
| 1244 | struct reiserfs_journal_cnode *cn, *last; |
| 1245 | cn = jl->j_realblock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1247 | /* which is better, to lock once around the whole loop, or |
| 1248 | ** to lock for each call to remove_journal_hash? |
| 1249 | */ |
| 1250 | while (cn) { |
| 1251 | if (cn->blocknr != 0) { |
| 1252 | if (debug) { |
| 1253 | reiserfs_warning(p_s_sb, |
| 1254 | "block %u, bh is %d, state %ld", |
| 1255 | cn->blocknr, cn->bh ? 1 : 0, |
| 1256 | cn->state); |
| 1257 | } |
| 1258 | cn->state = 0; |
| 1259 | remove_journal_hash(p_s_sb, journal->j_list_hash_table, |
| 1260 | jl, cn->blocknr, 1); |
| 1261 | } |
| 1262 | last = cn; |
| 1263 | cn = cn->next; |
| 1264 | free_cnode(p_s_sb, last); |
| 1265 | } |
| 1266 | jl->j_realblock = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | } |
| 1268 | |
| 1269 | /* |
| 1270 | ** if this timestamp is greater than the timestamp we wrote last to the header block, write it to the header block. |
| 1271 | ** once this is done, I can safely say the log area for this transaction won't ever be replayed, and I can start |
| 1272 | ** releasing blocks in this transaction for reuse as data blocks. |
| 1273 | ** called by flush_journal_list, before it calls remove_all_from_journal_list |
| 1274 | ** |
| 1275 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1276 | static int _update_journal_header_block(struct super_block *p_s_sb, |
| 1277 | unsigned long offset, |
| 1278 | unsigned long trans_id) |
| 1279 | { |
| 1280 | struct reiserfs_journal_header *jh; |
| 1281 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1283 | if (reiserfs_is_journal_aborted(journal)) |
| 1284 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1286 | if (trans_id >= journal->j_last_flush_trans_id) { |
| 1287 | if (buffer_locked((journal->j_header_bh))) { |
| 1288 | wait_on_buffer((journal->j_header_bh)); |
| 1289 | if (unlikely(!buffer_uptodate(journal->j_header_bh))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | #ifdef CONFIG_REISERFS_CHECK |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1291 | reiserfs_warning(p_s_sb, |
| 1292 | "journal-699: buffer write failed"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | #endif |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1294 | return -EIO; |
| 1295 | } |
| 1296 | } |
| 1297 | journal->j_last_flush_trans_id = trans_id; |
| 1298 | journal->j_first_unflushed_offset = offset; |
| 1299 | jh = (struct reiserfs_journal_header *)(journal->j_header_bh-> |
| 1300 | b_data); |
| 1301 | jh->j_last_flush_trans_id = cpu_to_le32(trans_id); |
| 1302 | jh->j_first_unflushed_offset = cpu_to_le32(offset); |
| 1303 | jh->j_mount_id = cpu_to_le32(journal->j_mount_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1305 | if (reiserfs_barrier_flush(p_s_sb)) { |
| 1306 | int ret; |
| 1307 | lock_buffer(journal->j_header_bh); |
| 1308 | ret = submit_barrier_buffer(journal->j_header_bh); |
| 1309 | if (ret == -EOPNOTSUPP) { |
| 1310 | set_buffer_uptodate(journal->j_header_bh); |
| 1311 | disable_barrier(p_s_sb); |
| 1312 | goto sync; |
| 1313 | } |
| 1314 | wait_on_buffer(journal->j_header_bh); |
| 1315 | check_barrier_completion(p_s_sb, journal->j_header_bh); |
| 1316 | } else { |
| 1317 | sync: |
| 1318 | set_buffer_dirty(journal->j_header_bh); |
| 1319 | sync_dirty_buffer(journal->j_header_bh); |
| 1320 | } |
| 1321 | if (!buffer_uptodate(journal->j_header_bh)) { |
| 1322 | reiserfs_warning(p_s_sb, |
| 1323 | "journal-837: IO error during journal replay"); |
| 1324 | return -EIO; |
| 1325 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1327 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | } |
| 1329 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1330 | static int update_journal_header_block(struct super_block *p_s_sb, |
| 1331 | unsigned long offset, |
| 1332 | unsigned long trans_id) |
| 1333 | { |
| 1334 | return _update_journal_header_block(p_s_sb, offset, trans_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1336 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | /* |
| 1338 | ** flush any and all journal lists older than you are |
| 1339 | ** can only be called from flush_journal_list |
| 1340 | */ |
| 1341 | static int flush_older_journal_lists(struct super_block *p_s_sb, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1342 | struct reiserfs_journal_list *jl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1344 | struct list_head *entry; |
| 1345 | struct reiserfs_journal_list *other_jl; |
| 1346 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
| 1347 | unsigned long trans_id = jl->j_trans_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1349 | /* we know we are the only ones flushing things, no extra race |
| 1350 | * protection is required. |
| 1351 | */ |
| 1352 | restart: |
| 1353 | entry = journal->j_journal_list.next; |
| 1354 | /* Did we wrap? */ |
| 1355 | if (entry == &journal->j_journal_list) |
| 1356 | return 0; |
| 1357 | other_jl = JOURNAL_LIST_ENTRY(entry); |
| 1358 | if (other_jl->j_trans_id < trans_id) { |
| 1359 | BUG_ON(other_jl->j_refcount <= 0); |
| 1360 | /* do not flush all */ |
| 1361 | flush_journal_list(p_s_sb, other_jl, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1363 | /* other_jl is now deleted from the list */ |
| 1364 | goto restart; |
| 1365 | } |
| 1366 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | } |
| 1368 | |
| 1369 | static void del_from_work_list(struct super_block *s, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1370 | struct reiserfs_journal_list *jl) |
| 1371 | { |
| 1372 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
| 1373 | if (!list_empty(&jl->j_working_list)) { |
| 1374 | list_del_init(&jl->j_working_list); |
| 1375 | journal->j_num_work_lists--; |
| 1376 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1377 | } |
| 1378 | |
| 1379 | /* flush a journal list, both commit and real blocks |
| 1380 | ** |
| 1381 | ** always set flushall to 1, unless you are calling from inside |
| 1382 | ** flush_journal_list |
| 1383 | ** |
| 1384 | ** IMPORTANT. This can only be called while there are no journal writers, |
| 1385 | ** and the journal is locked. That means it can only be called from |
| 1386 | ** do_journal_end, or by journal_release |
| 1387 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1388 | static int flush_journal_list(struct super_block *s, |
| 1389 | struct reiserfs_journal_list *jl, int flushall) |
| 1390 | { |
| 1391 | struct reiserfs_journal_list *pjl; |
| 1392 | struct reiserfs_journal_cnode *cn, *last; |
| 1393 | int count; |
| 1394 | int was_jwait = 0; |
| 1395 | int was_dirty = 0; |
| 1396 | struct buffer_head *saved_bh; |
| 1397 | unsigned long j_len_saved = jl->j_len; |
| 1398 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
| 1399 | int err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1401 | BUG_ON(j_len_saved <= 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1402 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1403 | if (atomic_read(&journal->j_wcount) != 0) { |
| 1404 | reiserfs_warning(s, |
| 1405 | "clm-2048: flush_journal_list called with wcount %d", |
| 1406 | atomic_read(&journal->j_wcount)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1408 | BUG_ON(jl->j_trans_id == 0); |
| 1409 | |
| 1410 | /* if flushall == 0, the lock is already held */ |
| 1411 | if (flushall) { |
Jeff Mahoney | afe7025 | 2008-07-25 01:46:39 -0700 | [diff] [blame] | 1412 | mutex_lock(&journal->j_flush_mutex); |
| 1413 | } else if (mutex_trylock(&journal->j_flush_mutex)) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1414 | BUG(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1415 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1416 | |
| 1417 | count = 0; |
| 1418 | if (j_len_saved > journal->j_trans_max) { |
| 1419 | reiserfs_panic(s, |
| 1420 | "journal-715: flush_journal_list, length is %lu, trans id %lu\n", |
| 1421 | j_len_saved, jl->j_trans_id); |
| 1422 | return 0; |
| 1423 | } |
| 1424 | |
| 1425 | get_fs_excl(); |
| 1426 | |
| 1427 | /* if all the work is already done, get out of here */ |
| 1428 | if (atomic_read(&(jl->j_nonzerolen)) <= 0 && |
| 1429 | atomic_read(&(jl->j_commit_left)) <= 0) { |
| 1430 | goto flush_older_and_return; |
| 1431 | } |
| 1432 | |
| 1433 | /* start by putting the commit list on disk. This will also flush |
| 1434 | ** the commit lists of any olders transactions |
| 1435 | */ |
| 1436 | flush_commit_list(s, jl, 1); |
| 1437 | |
| 1438 | if (!(jl->j_state & LIST_DIRTY) |
| 1439 | && !reiserfs_is_journal_aborted(journal)) |
| 1440 | BUG(); |
| 1441 | |
| 1442 | /* are we done now? */ |
| 1443 | if (atomic_read(&(jl->j_nonzerolen)) <= 0 && |
| 1444 | atomic_read(&(jl->j_commit_left)) <= 0) { |
| 1445 | goto flush_older_and_return; |
| 1446 | } |
| 1447 | |
| 1448 | /* loop through each cnode, see if we need to write it, |
| 1449 | ** or wait on a more recent transaction, or just ignore it |
| 1450 | */ |
| 1451 | if (atomic_read(&(journal->j_wcount)) != 0) { |
| 1452 | reiserfs_panic(s, |
| 1453 | "journal-844: panic journal list is flushing, wcount is not 0\n"); |
| 1454 | } |
| 1455 | cn = jl->j_realblock; |
| 1456 | while (cn) { |
| 1457 | was_jwait = 0; |
| 1458 | was_dirty = 0; |
| 1459 | saved_bh = NULL; |
| 1460 | /* blocknr of 0 is no longer in the hash, ignore it */ |
| 1461 | if (cn->blocknr == 0) { |
| 1462 | goto free_cnode; |
| 1463 | } |
| 1464 | |
| 1465 | /* This transaction failed commit. Don't write out to the disk */ |
| 1466 | if (!(jl->j_state & LIST_DIRTY)) |
| 1467 | goto free_cnode; |
| 1468 | |
| 1469 | pjl = find_newer_jl_for_cn(cn); |
| 1470 | /* the order is important here. We check pjl to make sure we |
| 1471 | ** don't clear BH_JDirty_wait if we aren't the one writing this |
| 1472 | ** block to disk |
| 1473 | */ |
| 1474 | if (!pjl && cn->bh) { |
| 1475 | saved_bh = cn->bh; |
| 1476 | |
| 1477 | /* we do this to make sure nobody releases the buffer while |
| 1478 | ** we are working with it |
| 1479 | */ |
| 1480 | get_bh(saved_bh); |
| 1481 | |
| 1482 | if (buffer_journal_dirty(saved_bh)) { |
| 1483 | BUG_ON(!can_dirty(cn)); |
| 1484 | was_jwait = 1; |
| 1485 | was_dirty = 1; |
| 1486 | } else if (can_dirty(cn)) { |
| 1487 | /* everything with !pjl && jwait should be writable */ |
| 1488 | BUG(); |
| 1489 | } |
| 1490 | } |
| 1491 | |
| 1492 | /* if someone has this block in a newer transaction, just make |
Matt LaPlante | 0779bf2 | 2006-11-30 05:24:39 +0100 | [diff] [blame] | 1493 | ** sure they are committed, and don't try writing it to disk |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1494 | */ |
| 1495 | if (pjl) { |
| 1496 | if (atomic_read(&pjl->j_commit_left)) |
| 1497 | flush_commit_list(s, pjl, 1); |
| 1498 | goto free_cnode; |
| 1499 | } |
| 1500 | |
| 1501 | /* bh == NULL when the block got to disk on its own, OR, |
| 1502 | ** the block got freed in a future transaction |
| 1503 | */ |
| 1504 | if (saved_bh == NULL) { |
| 1505 | goto free_cnode; |
| 1506 | } |
| 1507 | |
| 1508 | /* this should never happen. kupdate_one_transaction has this list |
| 1509 | ** locked while it works, so we should never see a buffer here that |
| 1510 | ** is not marked JDirty_wait |
| 1511 | */ |
| 1512 | if ((!was_jwait) && !buffer_locked(saved_bh)) { |
| 1513 | reiserfs_warning(s, |
| 1514 | "journal-813: BAD! buffer %llu %cdirty %cjwait, " |
| 1515 | "not in a newer tranasction", |
| 1516 | (unsigned long long)saved_bh-> |
| 1517 | b_blocknr, was_dirty ? ' ' : '!', |
| 1518 | was_jwait ? ' ' : '!'); |
| 1519 | } |
| 1520 | if (was_dirty) { |
| 1521 | /* we inc again because saved_bh gets decremented at free_cnode */ |
| 1522 | get_bh(saved_bh); |
| 1523 | set_bit(BLOCK_NEEDS_FLUSH, &cn->state); |
| 1524 | lock_buffer(saved_bh); |
| 1525 | BUG_ON(cn->blocknr != saved_bh->b_blocknr); |
| 1526 | if (buffer_dirty(saved_bh)) |
| 1527 | submit_logged_buffer(saved_bh); |
| 1528 | else |
| 1529 | unlock_buffer(saved_bh); |
| 1530 | count++; |
| 1531 | } else { |
| 1532 | reiserfs_warning(s, |
| 1533 | "clm-2082: Unable to flush buffer %llu in %s", |
| 1534 | (unsigned long long)saved_bh-> |
Harvey Harrison | fbe5498 | 2008-04-28 02:16:22 -0700 | [diff] [blame] | 1535 | b_blocknr, __func__); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1536 | } |
| 1537 | free_cnode: |
| 1538 | last = cn; |
| 1539 | cn = cn->next; |
| 1540 | if (saved_bh) { |
| 1541 | /* we incremented this to keep others from taking the buffer head away */ |
| 1542 | put_bh(saved_bh); |
| 1543 | if (atomic_read(&(saved_bh->b_count)) < 0) { |
| 1544 | reiserfs_warning(s, |
| 1545 | "journal-945: saved_bh->b_count < 0"); |
| 1546 | } |
| 1547 | } |
| 1548 | } |
| 1549 | if (count > 0) { |
| 1550 | cn = jl->j_realblock; |
| 1551 | while (cn) { |
| 1552 | if (test_bit(BLOCK_NEEDS_FLUSH, &cn->state)) { |
| 1553 | if (!cn->bh) { |
| 1554 | reiserfs_panic(s, |
| 1555 | "journal-1011: cn->bh is NULL\n"); |
| 1556 | } |
| 1557 | wait_on_buffer(cn->bh); |
| 1558 | if (!cn->bh) { |
| 1559 | reiserfs_panic(s, |
| 1560 | "journal-1012: cn->bh is NULL\n"); |
| 1561 | } |
| 1562 | if (unlikely(!buffer_uptodate(cn->bh))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1563 | #ifdef CONFIG_REISERFS_CHECK |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1564 | reiserfs_warning(s, |
| 1565 | "journal-949: buffer write failed\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1566 | #endif |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1567 | err = -EIO; |
| 1568 | } |
| 1569 | /* note, we must clear the JDirty_wait bit after the up to date |
| 1570 | ** check, otherwise we race against our flushpage routine |
| 1571 | */ |
| 1572 | BUG_ON(!test_clear_buffer_journal_dirty |
| 1573 | (cn->bh)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1574 | |
Chris Mason | 398c95b | 2007-10-16 23:29:44 -0700 | [diff] [blame] | 1575 | /* drop one ref for us */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1576 | put_bh(cn->bh); |
Chris Mason | 398c95b | 2007-10-16 23:29:44 -0700 | [diff] [blame] | 1577 | /* drop one ref for journal_mark_dirty */ |
| 1578 | release_buffer_page(cn->bh); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1579 | } |
| 1580 | cn = cn->next; |
| 1581 | } |
| 1582 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1583 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1584 | if (err) |
| 1585 | reiserfs_abort(s, -EIO, |
| 1586 | "Write error while pushing transaction to disk in %s", |
Harvey Harrison | fbe5498 | 2008-04-28 02:16:22 -0700 | [diff] [blame] | 1587 | __func__); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1588 | flush_older_and_return: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1590 | /* before we can update the journal header block, we _must_ flush all |
| 1591 | ** real blocks from all older transactions to disk. This is because |
| 1592 | ** once the header block is updated, this transaction will not be |
| 1593 | ** replayed after a crash |
| 1594 | */ |
| 1595 | if (flushall) { |
| 1596 | flush_older_journal_lists(s, jl); |
| 1597 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1598 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1599 | err = journal->j_errno; |
| 1600 | /* before we can remove everything from the hash tables for this |
| 1601 | ** transaction, we must make sure it can never be replayed |
| 1602 | ** |
| 1603 | ** since we are only called from do_journal_end, we know for sure there |
| 1604 | ** are no allocations going on while we are flushing journal lists. So, |
| 1605 | ** we only need to update the journal header block for the last list |
| 1606 | ** being flushed |
| 1607 | */ |
| 1608 | if (!err && flushall) { |
| 1609 | err = |
| 1610 | update_journal_header_block(s, |
| 1611 | (jl->j_start + jl->j_len + |
| 1612 | 2) % SB_ONDISK_JOURNAL_SIZE(s), |
| 1613 | jl->j_trans_id); |
| 1614 | if (err) |
| 1615 | reiserfs_abort(s, -EIO, |
| 1616 | "Write error while updating journal header in %s", |
Harvey Harrison | fbe5498 | 2008-04-28 02:16:22 -0700 | [diff] [blame] | 1617 | __func__); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1618 | } |
| 1619 | remove_all_from_journal_list(s, jl, 0); |
| 1620 | list_del_init(&jl->j_list); |
| 1621 | journal->j_num_lists--; |
| 1622 | del_from_work_list(s, jl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1623 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1624 | if (journal->j_last_flush_id != 0 && |
| 1625 | (jl->j_trans_id - journal->j_last_flush_id) != 1) { |
| 1626 | reiserfs_warning(s, "clm-2201: last flush %lu, current %lu", |
| 1627 | journal->j_last_flush_id, jl->j_trans_id); |
| 1628 | } |
| 1629 | journal->j_last_flush_id = jl->j_trans_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1631 | /* not strictly required since we are freeing the list, but it should |
| 1632 | * help find code using dead lists later on |
| 1633 | */ |
| 1634 | jl->j_len = 0; |
| 1635 | atomic_set(&(jl->j_nonzerolen), 0); |
| 1636 | jl->j_start = 0; |
| 1637 | jl->j_realblock = NULL; |
| 1638 | jl->j_commit_bh = NULL; |
| 1639 | jl->j_trans_id = 0; |
| 1640 | jl->j_state = 0; |
| 1641 | put_journal_list(s, jl); |
| 1642 | if (flushall) |
Jeff Mahoney | afe7025 | 2008-07-25 01:46:39 -0700 | [diff] [blame] | 1643 | mutex_unlock(&journal->j_flush_mutex); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1644 | put_fs_excl(); |
| 1645 | return err; |
| 1646 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | |
Chris Mason | a317202 | 2006-09-29 01:59:56 -0700 | [diff] [blame] | 1648 | static int test_transaction(struct super_block *s, |
| 1649 | struct reiserfs_journal_list *jl) |
| 1650 | { |
| 1651 | struct reiserfs_journal_cnode *cn; |
| 1652 | |
| 1653 | if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) |
| 1654 | return 1; |
| 1655 | |
| 1656 | cn = jl->j_realblock; |
| 1657 | while (cn) { |
| 1658 | /* if the blocknr == 0, this has been cleared from the hash, |
| 1659 | ** skip it |
| 1660 | */ |
| 1661 | if (cn->blocknr == 0) { |
| 1662 | goto next; |
| 1663 | } |
| 1664 | if (cn->bh && !newer_jl_done(cn)) |
| 1665 | return 0; |
| 1666 | next: |
| 1667 | cn = cn->next; |
| 1668 | cond_resched(); |
| 1669 | } |
| 1670 | return 0; |
| 1671 | } |
| 1672 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1673 | static int write_one_transaction(struct super_block *s, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1674 | struct reiserfs_journal_list *jl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1675 | struct buffer_chunk *chunk) |
| 1676 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1677 | struct reiserfs_journal_cnode *cn; |
| 1678 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1679 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1680 | jl->j_state |= LIST_TOUCHED; |
| 1681 | del_from_work_list(s, jl); |
| 1682 | if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) { |
| 1683 | return 0; |
| 1684 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1685 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1686 | cn = jl->j_realblock; |
| 1687 | while (cn) { |
| 1688 | /* if the blocknr == 0, this has been cleared from the hash, |
| 1689 | ** skip it |
| 1690 | */ |
| 1691 | if (cn->blocknr == 0) { |
| 1692 | goto next; |
| 1693 | } |
| 1694 | if (cn->bh && can_dirty(cn) && buffer_dirty(cn->bh)) { |
| 1695 | struct buffer_head *tmp_bh; |
| 1696 | /* we can race against journal_mark_freed when we try |
| 1697 | * to lock_buffer(cn->bh), so we have to inc the buffer |
| 1698 | * count, and recheck things after locking |
| 1699 | */ |
| 1700 | tmp_bh = cn->bh; |
| 1701 | get_bh(tmp_bh); |
| 1702 | lock_buffer(tmp_bh); |
| 1703 | if (cn->bh && can_dirty(cn) && buffer_dirty(tmp_bh)) { |
| 1704 | if (!buffer_journal_dirty(tmp_bh) || |
| 1705 | buffer_journal_prepared(tmp_bh)) |
| 1706 | BUG(); |
| 1707 | add_to_chunk(chunk, tmp_bh, NULL, write_chunk); |
| 1708 | ret++; |
| 1709 | } else { |
| 1710 | /* note, cn->bh might be null now */ |
| 1711 | unlock_buffer(tmp_bh); |
| 1712 | } |
| 1713 | put_bh(tmp_bh); |
| 1714 | } |
| 1715 | next: |
| 1716 | cn = cn->next; |
| 1717 | cond_resched(); |
| 1718 | } |
| 1719 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1720 | } |
| 1721 | |
| 1722 | /* used by flush_commit_list */ |
| 1723 | static int dirty_one_transaction(struct super_block *s, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1724 | struct reiserfs_journal_list *jl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1725 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1726 | struct reiserfs_journal_cnode *cn; |
| 1727 | struct reiserfs_journal_list *pjl; |
| 1728 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1730 | jl->j_state |= LIST_DIRTY; |
| 1731 | cn = jl->j_realblock; |
| 1732 | while (cn) { |
| 1733 | /* look for a more recent transaction that logged this |
| 1734 | ** buffer. Only the most recent transaction with a buffer in |
| 1735 | ** it is allowed to send that buffer to disk |
| 1736 | */ |
| 1737 | pjl = find_newer_jl_for_cn(cn); |
| 1738 | if (!pjl && cn->blocknr && cn->bh |
| 1739 | && buffer_journal_dirty(cn->bh)) { |
| 1740 | BUG_ON(!can_dirty(cn)); |
| 1741 | /* if the buffer is prepared, it will either be logged |
| 1742 | * or restored. If restored, we need to make sure |
| 1743 | * it actually gets marked dirty |
| 1744 | */ |
| 1745 | clear_buffer_journal_new(cn->bh); |
| 1746 | if (buffer_journal_prepared(cn->bh)) { |
| 1747 | set_buffer_journal_restore_dirty(cn->bh); |
| 1748 | } else { |
| 1749 | set_buffer_journal_test(cn->bh); |
| 1750 | mark_buffer_dirty(cn->bh); |
| 1751 | } |
| 1752 | } |
| 1753 | cn = cn->next; |
| 1754 | } |
| 1755 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1756 | } |
| 1757 | |
| 1758 | static int kupdate_transactions(struct super_block *s, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1759 | struct reiserfs_journal_list *jl, |
| 1760 | struct reiserfs_journal_list **next_jl, |
| 1761 | unsigned long *next_trans_id, |
| 1762 | int num_blocks, int num_trans) |
| 1763 | { |
| 1764 | int ret = 0; |
| 1765 | int written = 0; |
| 1766 | int transactions_flushed = 0; |
| 1767 | unsigned long orig_trans_id = jl->j_trans_id; |
| 1768 | struct buffer_chunk chunk; |
| 1769 | struct list_head *entry; |
| 1770 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
| 1771 | chunk.nr = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | |
Jeff Mahoney | afe7025 | 2008-07-25 01:46:39 -0700 | [diff] [blame] | 1773 | mutex_lock(&journal->j_flush_mutex); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1774 | if (!journal_list_still_alive(s, orig_trans_id)) { |
| 1775 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1776 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1777 | |
Jeff Mahoney | afe7025 | 2008-07-25 01:46:39 -0700 | [diff] [blame] | 1778 | /* we've got j_flush_mutex held, nobody is going to delete any |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1779 | * of these lists out from underneath us |
| 1780 | */ |
| 1781 | while ((num_trans && transactions_flushed < num_trans) || |
| 1782 | (!num_trans && written < num_blocks)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1783 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1784 | if (jl->j_len == 0 || (jl->j_state & LIST_TOUCHED) || |
| 1785 | atomic_read(&jl->j_commit_left) |
| 1786 | || !(jl->j_state & LIST_DIRTY)) { |
| 1787 | del_from_work_list(s, jl); |
| 1788 | break; |
| 1789 | } |
| 1790 | ret = write_one_transaction(s, jl, &chunk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1791 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1792 | if (ret < 0) |
| 1793 | goto done; |
| 1794 | transactions_flushed++; |
| 1795 | written += ret; |
| 1796 | entry = jl->j_list.next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1797 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1798 | /* did we wrap? */ |
| 1799 | if (entry == &journal->j_journal_list) { |
| 1800 | break; |
| 1801 | } |
| 1802 | jl = JOURNAL_LIST_ENTRY(entry); |
| 1803 | |
| 1804 | /* don't bother with older transactions */ |
| 1805 | if (jl->j_trans_id <= orig_trans_id) |
| 1806 | break; |
| 1807 | } |
| 1808 | if (chunk.nr) { |
| 1809 | write_chunk(&chunk); |
| 1810 | } |
| 1811 | |
| 1812 | done: |
Jeff Mahoney | afe7025 | 2008-07-25 01:46:39 -0700 | [diff] [blame] | 1813 | mutex_unlock(&journal->j_flush_mutex); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1814 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1815 | } |
| 1816 | |
| 1817 | /* for o_sync and fsync heavy applications, they tend to use |
| 1818 | ** all the journa list slots with tiny transactions. These |
| 1819 | ** trigger lots and lots of calls to update the header block, which |
| 1820 | ** adds seeks and slows things down. |
| 1821 | ** |
| 1822 | ** This function tries to clear out a large chunk of the journal lists |
| 1823 | ** at once, which makes everything faster since only the newest journal |
| 1824 | ** list updates the header block |
| 1825 | */ |
| 1826 | static int flush_used_journal_lists(struct super_block *s, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1827 | struct reiserfs_journal_list *jl) |
| 1828 | { |
| 1829 | unsigned long len = 0; |
| 1830 | unsigned long cur_len; |
| 1831 | int ret; |
| 1832 | int i; |
| 1833 | int limit = 256; |
| 1834 | struct reiserfs_journal_list *tjl; |
| 1835 | struct reiserfs_journal_list *flush_jl; |
| 1836 | unsigned long trans_id; |
| 1837 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1838 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1839 | flush_jl = tjl = jl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1840 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1841 | /* in data logging mode, try harder to flush a lot of blocks */ |
| 1842 | if (reiserfs_data_log(s)) |
| 1843 | limit = 1024; |
| 1844 | /* flush for 256 transactions or limit blocks, whichever comes first */ |
| 1845 | for (i = 0; i < 256 && len < limit; i++) { |
| 1846 | if (atomic_read(&tjl->j_commit_left) || |
| 1847 | tjl->j_trans_id < jl->j_trans_id) { |
| 1848 | break; |
| 1849 | } |
| 1850 | cur_len = atomic_read(&tjl->j_nonzerolen); |
| 1851 | if (cur_len > 0) { |
| 1852 | tjl->j_state &= ~LIST_TOUCHED; |
| 1853 | } |
| 1854 | len += cur_len; |
| 1855 | flush_jl = tjl; |
| 1856 | if (tjl->j_list.next == &journal->j_journal_list) |
| 1857 | break; |
| 1858 | tjl = JOURNAL_LIST_ENTRY(tjl->j_list.next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1859 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1860 | /* try to find a group of blocks we can flush across all the |
| 1861 | ** transactions, but only bother if we've actually spanned |
| 1862 | ** across multiple lists |
| 1863 | */ |
| 1864 | if (flush_jl != jl) { |
| 1865 | ret = kupdate_transactions(s, jl, &tjl, &trans_id, len, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1867 | flush_journal_list(s, flush_jl, 1); |
| 1868 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1869 | } |
| 1870 | |
| 1871 | /* |
| 1872 | ** removes any nodes in table with name block and dev as bh. |
| 1873 | ** only touchs the hnext and hprev pointers. |
| 1874 | */ |
| 1875 | void remove_journal_hash(struct super_block *sb, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1876 | struct reiserfs_journal_cnode **table, |
| 1877 | struct reiserfs_journal_list *jl, |
| 1878 | unsigned long block, int remove_freed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1879 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1880 | struct reiserfs_journal_cnode *cur; |
| 1881 | struct reiserfs_journal_cnode **head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1883 | head = &(journal_hash(table, sb, block)); |
| 1884 | if (!head) { |
| 1885 | return; |
| 1886 | } |
| 1887 | cur = *head; |
| 1888 | while (cur) { |
| 1889 | if (cur->blocknr == block && cur->sb == sb |
| 1890 | && (jl == NULL || jl == cur->jlist) |
| 1891 | && (!test_bit(BLOCK_FREED, &cur->state) || remove_freed)) { |
| 1892 | if (cur->hnext) { |
| 1893 | cur->hnext->hprev = cur->hprev; |
| 1894 | } |
| 1895 | if (cur->hprev) { |
| 1896 | cur->hprev->hnext = cur->hnext; |
| 1897 | } else { |
| 1898 | *head = cur->hnext; |
| 1899 | } |
| 1900 | cur->blocknr = 0; |
| 1901 | cur->sb = NULL; |
| 1902 | cur->state = 0; |
| 1903 | if (cur->bh && cur->jlist) /* anybody who clears the cur->bh will also dec the nonzerolen */ |
| 1904 | atomic_dec(&(cur->jlist->j_nonzerolen)); |
| 1905 | cur->bh = NULL; |
| 1906 | cur->jlist = NULL; |
| 1907 | } |
| 1908 | cur = cur->hnext; |
| 1909 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1910 | } |
| 1911 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1912 | static void free_journal_ram(struct super_block *p_s_sb) |
| 1913 | { |
| 1914 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
Pekka Enberg | d739b42 | 2006-02-01 03:06:43 -0800 | [diff] [blame] | 1915 | kfree(journal->j_current_jl); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1916 | journal->j_num_lists--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1917 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1918 | vfree(journal->j_cnode_free_orig); |
| 1919 | free_list_bitmaps(p_s_sb, journal->j_list_bitmap); |
| 1920 | free_bitmap_nodes(p_s_sb); /* must be after free_list_bitmaps */ |
| 1921 | if (journal->j_header_bh) { |
| 1922 | brelse(journal->j_header_bh); |
| 1923 | } |
| 1924 | /* j_header_bh is on the journal dev, make sure not to release the journal |
| 1925 | * dev until we brelse j_header_bh |
| 1926 | */ |
| 1927 | release_journal_dev(p_s_sb, journal); |
| 1928 | vfree(journal); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1929 | } |
| 1930 | |
| 1931 | /* |
| 1932 | ** call on unmount. Only set error to 1 if you haven't made your way out |
| 1933 | ** of read_super() yet. Any other caller must keep error at 0. |
| 1934 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1935 | static int do_journal_release(struct reiserfs_transaction_handle *th, |
| 1936 | struct super_block *p_s_sb, int error) |
| 1937 | { |
| 1938 | struct reiserfs_transaction_handle myth; |
| 1939 | int flushed = 0; |
| 1940 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1941 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1942 | /* we only want to flush out transactions if we were called with error == 0 |
| 1943 | */ |
| 1944 | if (!error && !(p_s_sb->s_flags & MS_RDONLY)) { |
| 1945 | /* end the current trans */ |
| 1946 | BUG_ON(!th->t_trans_id); |
| 1947 | do_journal_end(th, p_s_sb, 10, FLUSH_ALL); |
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 | /* make sure something gets logged to force our way into the flush code */ |
| 1950 | if (!journal_join(&myth, p_s_sb, 1)) { |
| 1951 | reiserfs_prepare_for_journal(p_s_sb, |
| 1952 | SB_BUFFER_WITH_SB(p_s_sb), |
| 1953 | 1); |
| 1954 | journal_mark_dirty(&myth, p_s_sb, |
| 1955 | SB_BUFFER_WITH_SB(p_s_sb)); |
| 1956 | do_journal_end(&myth, p_s_sb, 1, FLUSH_ALL); |
| 1957 | flushed = 1; |
| 1958 | } |
| 1959 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1960 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1961 | /* this also catches errors during the do_journal_end above */ |
| 1962 | if (!error && reiserfs_is_journal_aborted(journal)) { |
| 1963 | memset(&myth, 0, sizeof(myth)); |
| 1964 | if (!journal_join_abort(&myth, p_s_sb, 1)) { |
| 1965 | reiserfs_prepare_for_journal(p_s_sb, |
| 1966 | SB_BUFFER_WITH_SB(p_s_sb), |
| 1967 | 1); |
| 1968 | journal_mark_dirty(&myth, p_s_sb, |
| 1969 | SB_BUFFER_WITH_SB(p_s_sb)); |
| 1970 | do_journal_end(&myth, p_s_sb, 1, FLUSH_ALL); |
| 1971 | } |
| 1972 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1973 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1974 | reiserfs_mounted_fs_count--; |
| 1975 | /* wait for all commits to finish */ |
| 1976 | cancel_delayed_work(&SB_JOURNAL(p_s_sb)->j_work); |
| 1977 | flush_workqueue(commit_wq); |
| 1978 | if (!reiserfs_mounted_fs_count) { |
| 1979 | destroy_workqueue(commit_wq); |
| 1980 | commit_wq = NULL; |
| 1981 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1982 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1983 | free_journal_ram(p_s_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1984 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1985 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1986 | } |
| 1987 | |
| 1988 | /* |
| 1989 | ** call on unmount. flush all journal trans, release all alloc'd ram |
| 1990 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1991 | int journal_release(struct reiserfs_transaction_handle *th, |
| 1992 | struct super_block *p_s_sb) |
| 1993 | { |
| 1994 | return do_journal_release(th, p_s_sb, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1995 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1996 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1997 | /* |
| 1998 | ** only call from an error condition inside reiserfs_read_super! |
| 1999 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2000 | int journal_release_error(struct reiserfs_transaction_handle *th, |
| 2001 | struct super_block *p_s_sb) |
| 2002 | { |
| 2003 | return do_journal_release(th, p_s_sb, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2004 | } |
| 2005 | |
| 2006 | /* compares description block with commit block. returns 1 if they differ, 0 if they are the same */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2007 | static int journal_compare_desc_commit(struct super_block *p_s_sb, |
| 2008 | struct reiserfs_journal_desc *desc, |
| 2009 | struct reiserfs_journal_commit *commit) |
| 2010 | { |
| 2011 | if (get_commit_trans_id(commit) != get_desc_trans_id(desc) || |
| 2012 | get_commit_trans_len(commit) != get_desc_trans_len(desc) || |
| 2013 | get_commit_trans_len(commit) > SB_JOURNAL(p_s_sb)->j_trans_max || |
| 2014 | get_commit_trans_len(commit) <= 0) { |
| 2015 | return 1; |
| 2016 | } |
| 2017 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2018 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2019 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2020 | /* returns 0 if it did not find a description block |
| 2021 | ** returns -1 if it found a corrupt commit block |
| 2022 | ** returns 1 if both desc and commit were valid |
| 2023 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2024 | static int journal_transaction_is_valid(struct super_block *p_s_sb, |
| 2025 | struct buffer_head *d_bh, |
| 2026 | unsigned long *oldest_invalid_trans_id, |
| 2027 | unsigned long *newest_mount_id) |
| 2028 | { |
| 2029 | struct reiserfs_journal_desc *desc; |
| 2030 | struct reiserfs_journal_commit *commit; |
| 2031 | struct buffer_head *c_bh; |
| 2032 | unsigned long offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2033 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2034 | if (!d_bh) |
| 2035 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2036 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2037 | desc = (struct reiserfs_journal_desc *)d_bh->b_data; |
| 2038 | if (get_desc_trans_len(desc) > 0 |
| 2039 | && !memcmp(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8)) { |
| 2040 | if (oldest_invalid_trans_id && *oldest_invalid_trans_id |
| 2041 | && get_desc_trans_id(desc) > *oldest_invalid_trans_id) { |
| 2042 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, |
| 2043 | "journal-986: transaction " |
| 2044 | "is valid returning because trans_id %d is greater than " |
| 2045 | "oldest_invalid %lu", |
| 2046 | get_desc_trans_id(desc), |
| 2047 | *oldest_invalid_trans_id); |
| 2048 | return 0; |
| 2049 | } |
| 2050 | if (newest_mount_id |
| 2051 | && *newest_mount_id > get_desc_mount_id(desc)) { |
| 2052 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, |
| 2053 | "journal-1087: transaction " |
| 2054 | "is valid returning because mount_id %d is less than " |
| 2055 | "newest_mount_id %lu", |
| 2056 | get_desc_mount_id(desc), |
| 2057 | *newest_mount_id); |
| 2058 | return -1; |
| 2059 | } |
| 2060 | if (get_desc_trans_len(desc) > SB_JOURNAL(p_s_sb)->j_trans_max) { |
| 2061 | reiserfs_warning(p_s_sb, |
| 2062 | "journal-2018: Bad transaction length %d encountered, ignoring transaction", |
| 2063 | get_desc_trans_len(desc)); |
| 2064 | return -1; |
| 2065 | } |
| 2066 | offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2067 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2068 | /* ok, we have a journal description block, lets see if the transaction was valid */ |
| 2069 | c_bh = |
| 2070 | journal_bread(p_s_sb, |
| 2071 | SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + |
| 2072 | ((offset + get_desc_trans_len(desc) + |
| 2073 | 1) % SB_ONDISK_JOURNAL_SIZE(p_s_sb))); |
| 2074 | if (!c_bh) |
| 2075 | return 0; |
| 2076 | commit = (struct reiserfs_journal_commit *)c_bh->b_data; |
| 2077 | if (journal_compare_desc_commit(p_s_sb, desc, commit)) { |
| 2078 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, |
| 2079 | "journal_transaction_is_valid, commit offset %ld had bad " |
| 2080 | "time %d or length %d", |
| 2081 | c_bh->b_blocknr - |
| 2082 | SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), |
| 2083 | get_commit_trans_id(commit), |
| 2084 | get_commit_trans_len(commit)); |
| 2085 | brelse(c_bh); |
| 2086 | if (oldest_invalid_trans_id) { |
| 2087 | *oldest_invalid_trans_id = |
| 2088 | get_desc_trans_id(desc); |
| 2089 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, |
| 2090 | "journal-1004: " |
| 2091 | "transaction_is_valid setting oldest invalid trans_id " |
| 2092 | "to %d", |
| 2093 | get_desc_trans_id(desc)); |
| 2094 | } |
| 2095 | return -1; |
| 2096 | } |
| 2097 | brelse(c_bh); |
| 2098 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, |
| 2099 | "journal-1006: found valid " |
| 2100 | "transaction start offset %llu, len %d id %d", |
| 2101 | d_bh->b_blocknr - |
| 2102 | SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), |
| 2103 | get_desc_trans_len(desc), |
| 2104 | get_desc_trans_id(desc)); |
| 2105 | return 1; |
| 2106 | } else { |
| 2107 | return 0; |
| 2108 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2109 | } |
| 2110 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2111 | static void brelse_array(struct buffer_head **heads, int num) |
| 2112 | { |
| 2113 | int i; |
| 2114 | for (i = 0; i < num; i++) { |
| 2115 | brelse(heads[i]); |
| 2116 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2117 | } |
| 2118 | |
| 2119 | /* |
| 2120 | ** given the start, and values for the oldest acceptable transactions, |
| 2121 | ** this either reads in a replays a transaction, or returns because the transaction |
| 2122 | ** is invalid, or too old. |
| 2123 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2124 | static int journal_read_transaction(struct super_block *p_s_sb, |
| 2125 | unsigned long cur_dblock, |
| 2126 | unsigned long oldest_start, |
| 2127 | unsigned long oldest_trans_id, |
| 2128 | unsigned long newest_mount_id) |
| 2129 | { |
| 2130 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
| 2131 | struct reiserfs_journal_desc *desc; |
| 2132 | struct reiserfs_journal_commit *commit; |
| 2133 | unsigned long trans_id = 0; |
| 2134 | struct buffer_head *c_bh; |
| 2135 | struct buffer_head *d_bh; |
| 2136 | struct buffer_head **log_blocks = NULL; |
| 2137 | struct buffer_head **real_blocks = NULL; |
| 2138 | unsigned long trans_offset; |
| 2139 | int i; |
| 2140 | int trans_half; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2141 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2142 | d_bh = journal_bread(p_s_sb, cur_dblock); |
| 2143 | if (!d_bh) |
| 2144 | return 1; |
| 2145 | desc = (struct reiserfs_journal_desc *)d_bh->b_data; |
| 2146 | trans_offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb); |
| 2147 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1037: " |
| 2148 | "journal_read_transaction, offset %llu, len %d mount_id %d", |
| 2149 | d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), |
| 2150 | get_desc_trans_len(desc), get_desc_mount_id(desc)); |
| 2151 | if (get_desc_trans_id(desc) < oldest_trans_id) { |
| 2152 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1039: " |
| 2153 | "journal_read_trans skipping because %lu is too old", |
| 2154 | cur_dblock - |
| 2155 | SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb)); |
| 2156 | brelse(d_bh); |
| 2157 | return 1; |
| 2158 | } |
| 2159 | if (get_desc_mount_id(desc) != newest_mount_id) { |
| 2160 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1146: " |
| 2161 | "journal_read_trans skipping because %d is != " |
| 2162 | "newest_mount_id %lu", get_desc_mount_id(desc), |
| 2163 | newest_mount_id); |
| 2164 | brelse(d_bh); |
| 2165 | return 1; |
| 2166 | } |
| 2167 | c_bh = journal_bread(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + |
| 2168 | ((trans_offset + get_desc_trans_len(desc) + 1) % |
| 2169 | SB_ONDISK_JOURNAL_SIZE(p_s_sb))); |
| 2170 | if (!c_bh) { |
| 2171 | brelse(d_bh); |
| 2172 | return 1; |
| 2173 | } |
| 2174 | commit = (struct reiserfs_journal_commit *)c_bh->b_data; |
| 2175 | if (journal_compare_desc_commit(p_s_sb, desc, commit)) { |
| 2176 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, |
| 2177 | "journal_read_transaction, " |
| 2178 | "commit offset %llu had bad time %d or length %d", |
| 2179 | c_bh->b_blocknr - |
| 2180 | SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), |
| 2181 | get_commit_trans_id(commit), |
| 2182 | get_commit_trans_len(commit)); |
| 2183 | brelse(c_bh); |
| 2184 | brelse(d_bh); |
| 2185 | return 1; |
| 2186 | } |
| 2187 | trans_id = get_desc_trans_id(desc); |
| 2188 | /* now we know we've got a good transaction, and it was inside the valid time ranges */ |
Pekka Enberg | d739b42 | 2006-02-01 03:06:43 -0800 | [diff] [blame] | 2189 | log_blocks = kmalloc(get_desc_trans_len(desc) * |
| 2190 | sizeof(struct buffer_head *), GFP_NOFS); |
| 2191 | real_blocks = kmalloc(get_desc_trans_len(desc) * |
| 2192 | sizeof(struct buffer_head *), GFP_NOFS); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2193 | if (!log_blocks || !real_blocks) { |
| 2194 | brelse(c_bh); |
| 2195 | brelse(d_bh); |
Pekka Enberg | d739b42 | 2006-02-01 03:06:43 -0800 | [diff] [blame] | 2196 | kfree(log_blocks); |
| 2197 | kfree(real_blocks); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2198 | reiserfs_warning(p_s_sb, |
| 2199 | "journal-1169: kmalloc failed, unable to mount FS"); |
| 2200 | return -1; |
| 2201 | } |
| 2202 | /* get all the buffer heads */ |
| 2203 | trans_half = journal_trans_half(p_s_sb->s_blocksize); |
| 2204 | for (i = 0; i < get_desc_trans_len(desc); i++) { |
| 2205 | log_blocks[i] = |
| 2206 | journal_getblk(p_s_sb, |
| 2207 | SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + |
| 2208 | (trans_offset + 1 + |
| 2209 | i) % SB_ONDISK_JOURNAL_SIZE(p_s_sb)); |
| 2210 | if (i < trans_half) { |
| 2211 | real_blocks[i] = |
| 2212 | sb_getblk(p_s_sb, |
| 2213 | le32_to_cpu(desc->j_realblock[i])); |
| 2214 | } else { |
| 2215 | real_blocks[i] = |
| 2216 | sb_getblk(p_s_sb, |
| 2217 | le32_to_cpu(commit-> |
| 2218 | j_realblock[i - trans_half])); |
| 2219 | } |
| 2220 | if (real_blocks[i]->b_blocknr > SB_BLOCK_COUNT(p_s_sb)) { |
| 2221 | reiserfs_warning(p_s_sb, |
| 2222 | "journal-1207: REPLAY FAILURE fsck required! Block to replay is outside of filesystem"); |
| 2223 | goto abort_replay; |
| 2224 | } |
| 2225 | /* make sure we don't try to replay onto log or reserved area */ |
| 2226 | if (is_block_in_log_or_reserved_area |
| 2227 | (p_s_sb, real_blocks[i]->b_blocknr)) { |
| 2228 | reiserfs_warning(p_s_sb, |
| 2229 | "journal-1204: REPLAY FAILURE fsck required! Trying to replay onto a log block"); |
| 2230 | abort_replay: |
| 2231 | brelse_array(log_blocks, i); |
| 2232 | brelse_array(real_blocks, i); |
| 2233 | brelse(c_bh); |
| 2234 | brelse(d_bh); |
Pekka Enberg | d739b42 | 2006-02-01 03:06:43 -0800 | [diff] [blame] | 2235 | kfree(log_blocks); |
| 2236 | kfree(real_blocks); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2237 | return -1; |
| 2238 | } |
| 2239 | } |
| 2240 | /* read in the log blocks, memcpy to the corresponding real block */ |
| 2241 | ll_rw_block(READ, get_desc_trans_len(desc), log_blocks); |
| 2242 | for (i = 0; i < get_desc_trans_len(desc); i++) { |
| 2243 | wait_on_buffer(log_blocks[i]); |
| 2244 | if (!buffer_uptodate(log_blocks[i])) { |
| 2245 | reiserfs_warning(p_s_sb, |
| 2246 | "journal-1212: REPLAY FAILURE fsck required! buffer write failed"); |
| 2247 | brelse_array(log_blocks + i, |
| 2248 | get_desc_trans_len(desc) - i); |
| 2249 | brelse_array(real_blocks, get_desc_trans_len(desc)); |
| 2250 | brelse(c_bh); |
| 2251 | brelse(d_bh); |
Pekka Enberg | d739b42 | 2006-02-01 03:06:43 -0800 | [diff] [blame] | 2252 | kfree(log_blocks); |
| 2253 | kfree(real_blocks); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2254 | return -1; |
| 2255 | } |
| 2256 | memcpy(real_blocks[i]->b_data, log_blocks[i]->b_data, |
| 2257 | real_blocks[i]->b_size); |
| 2258 | set_buffer_uptodate(real_blocks[i]); |
| 2259 | brelse(log_blocks[i]); |
| 2260 | } |
| 2261 | /* flush out the real blocks */ |
| 2262 | for (i = 0; i < get_desc_trans_len(desc); i++) { |
| 2263 | set_buffer_dirty(real_blocks[i]); |
Jan Kara | 53778ff | 2005-09-06 15:19:14 -0700 | [diff] [blame] | 2264 | ll_rw_block(SWRITE, 1, real_blocks + i); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2265 | } |
| 2266 | for (i = 0; i < get_desc_trans_len(desc); i++) { |
| 2267 | wait_on_buffer(real_blocks[i]); |
| 2268 | if (!buffer_uptodate(real_blocks[i])) { |
| 2269 | reiserfs_warning(p_s_sb, |
| 2270 | "journal-1226: REPLAY FAILURE, fsck required! buffer write failed"); |
| 2271 | brelse_array(real_blocks + i, |
| 2272 | get_desc_trans_len(desc) - i); |
| 2273 | brelse(c_bh); |
| 2274 | brelse(d_bh); |
Pekka Enberg | d739b42 | 2006-02-01 03:06:43 -0800 | [diff] [blame] | 2275 | kfree(log_blocks); |
| 2276 | kfree(real_blocks); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2277 | return -1; |
| 2278 | } |
| 2279 | brelse(real_blocks[i]); |
| 2280 | } |
| 2281 | cur_dblock = |
| 2282 | SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + |
| 2283 | ((trans_offset + get_desc_trans_len(desc) + |
| 2284 | 2) % SB_ONDISK_JOURNAL_SIZE(p_s_sb)); |
| 2285 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, |
| 2286 | "journal-1095: setting journal " "start to offset %ld", |
| 2287 | cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb)); |
| 2288 | |
| 2289 | /* init starting values for the first transaction, in case this is the last transaction to be replayed. */ |
| 2290 | journal->j_start = cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb); |
| 2291 | journal->j_last_flush_trans_id = trans_id; |
| 2292 | journal->j_trans_id = trans_id + 1; |
Alexander Zarochentsev | a44c94a | 2006-03-25 03:06:59 -0800 | [diff] [blame] | 2293 | /* check for trans_id overflow */ |
| 2294 | if (journal->j_trans_id == 0) |
| 2295 | journal->j_trans_id = 10; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2296 | brelse(c_bh); |
| 2297 | brelse(d_bh); |
Pekka Enberg | d739b42 | 2006-02-01 03:06:43 -0800 | [diff] [blame] | 2298 | kfree(log_blocks); |
| 2299 | kfree(real_blocks); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2300 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2301 | } |
| 2302 | |
| 2303 | /* This function reads blocks starting from block and to max_block of bufsize |
| 2304 | size (but no more than BUFNR blocks at a time). This proved to improve |
| 2305 | mounting speed on self-rebuilding raid5 arrays at least. |
| 2306 | Right now it is only used from journal code. But later we might use it |
| 2307 | from other places. |
| 2308 | Note: Do not use journal_getblk/sb_getblk functions here! */ |
Jeff Mahoney | 3ee1667 | 2007-10-18 23:39:25 -0700 | [diff] [blame] | 2309 | static struct buffer_head *reiserfs_breada(struct block_device *dev, |
| 2310 | b_blocknr_t block, int bufsize, |
| 2311 | b_blocknr_t max_block) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2312 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2313 | struct buffer_head *bhlist[BUFNR]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2314 | unsigned int blocks = BUFNR; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2315 | struct buffer_head *bh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2316 | int i, j; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2317 | |
| 2318 | bh = __getblk(dev, block, bufsize); |
| 2319 | if (buffer_uptodate(bh)) |
| 2320 | return (bh); |
| 2321 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2322 | if (block + BUFNR > max_block) { |
| 2323 | blocks = max_block - block; |
| 2324 | } |
| 2325 | bhlist[0] = bh; |
| 2326 | j = 1; |
| 2327 | for (i = 1; i < blocks; i++) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2328 | bh = __getblk(dev, block + i, bufsize); |
| 2329 | if (buffer_uptodate(bh)) { |
| 2330 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2331 | break; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2332 | } else |
| 2333 | bhlist[j++] = bh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2334 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2335 | ll_rw_block(READ, j, bhlist); |
| 2336 | for (i = 1; i < j; i++) |
| 2337 | brelse(bhlist[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2338 | bh = bhlist[0]; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2339 | wait_on_buffer(bh); |
| 2340 | if (buffer_uptodate(bh)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2341 | return bh; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2342 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2343 | return NULL; |
| 2344 | } |
| 2345 | |
| 2346 | /* |
| 2347 | ** read and replay the log |
| 2348 | ** on a clean unmount, the journal header's next unflushed pointer will be to an invalid |
| 2349 | ** transaction. This tests that before finding all the transactions in the log, which makes normal mount times fast. |
| 2350 | ** |
| 2351 | ** After a crash, this starts with the next unflushed transaction, and replays until it finds one too old, or invalid. |
| 2352 | ** |
| 2353 | ** On exit, it sets things up so the first transaction will work correctly. |
| 2354 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2355 | static int journal_read(struct super_block *p_s_sb) |
| 2356 | { |
| 2357 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
| 2358 | struct reiserfs_journal_desc *desc; |
| 2359 | unsigned long oldest_trans_id = 0; |
| 2360 | unsigned long oldest_invalid_trans_id = 0; |
| 2361 | time_t start; |
| 2362 | unsigned long oldest_start = 0; |
| 2363 | unsigned long cur_dblock = 0; |
| 2364 | unsigned long newest_mount_id = 9; |
| 2365 | struct buffer_head *d_bh; |
| 2366 | struct reiserfs_journal_header *jh; |
| 2367 | int valid_journal_header = 0; |
| 2368 | int replay_count = 0; |
| 2369 | int continue_replay = 1; |
| 2370 | int ret; |
| 2371 | char b[BDEVNAME_SIZE]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2372 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2373 | cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb); |
| 2374 | reiserfs_info(p_s_sb, "checking transaction log (%s)\n", |
| 2375 | bdevname(journal->j_dev_bd, b)); |
| 2376 | start = get_seconds(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2377 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2378 | /* step 1, read in the journal header block. Check the transaction it says |
| 2379 | ** is the first unflushed, and if that transaction is not valid, |
| 2380 | ** replay is done |
| 2381 | */ |
| 2382 | journal->j_header_bh = journal_bread(p_s_sb, |
| 2383 | SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) |
| 2384 | + SB_ONDISK_JOURNAL_SIZE(p_s_sb)); |
| 2385 | if (!journal->j_header_bh) { |
| 2386 | return 1; |
| 2387 | } |
| 2388 | jh = (struct reiserfs_journal_header *)(journal->j_header_bh->b_data); |
Vladimir V. Saveliev | c499ec2 | 2006-03-02 02:54:39 -0800 | [diff] [blame] | 2389 | if (le32_to_cpu(jh->j_first_unflushed_offset) < |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2390 | SB_ONDISK_JOURNAL_SIZE(p_s_sb) |
| 2391 | && le32_to_cpu(jh->j_last_flush_trans_id) > 0) { |
| 2392 | oldest_start = |
| 2393 | SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + |
| 2394 | le32_to_cpu(jh->j_first_unflushed_offset); |
| 2395 | oldest_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) + 1; |
| 2396 | newest_mount_id = le32_to_cpu(jh->j_mount_id); |
| 2397 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, |
| 2398 | "journal-1153: found in " |
| 2399 | "header: first_unflushed_offset %d, last_flushed_trans_id " |
| 2400 | "%lu", le32_to_cpu(jh->j_first_unflushed_offset), |
| 2401 | le32_to_cpu(jh->j_last_flush_trans_id)); |
| 2402 | valid_journal_header = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2403 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2404 | /* now, we try to read the first unflushed offset. If it is not valid, |
| 2405 | ** there is nothing more we can do, and it makes no sense to read |
| 2406 | ** through the whole log. |
| 2407 | */ |
| 2408 | d_bh = |
| 2409 | journal_bread(p_s_sb, |
| 2410 | SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + |
| 2411 | le32_to_cpu(jh->j_first_unflushed_offset)); |
| 2412 | ret = journal_transaction_is_valid(p_s_sb, d_bh, NULL, NULL); |
| 2413 | if (!ret) { |
| 2414 | continue_replay = 0; |
| 2415 | } |
| 2416 | brelse(d_bh); |
| 2417 | goto start_log_replay; |
| 2418 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2419 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2420 | if (continue_replay && bdev_read_only(p_s_sb->s_bdev)) { |
| 2421 | reiserfs_warning(p_s_sb, |
| 2422 | "clm-2076: device is readonly, unable to replay log"); |
| 2423 | return -1; |
| 2424 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2425 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2426 | /* ok, there are transactions that need to be replayed. start with the first log block, find |
| 2427 | ** all the valid transactions, and pick out the oldest. |
| 2428 | */ |
| 2429 | while (continue_replay |
| 2430 | && cur_dblock < |
| 2431 | (SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + |
| 2432 | SB_ONDISK_JOURNAL_SIZE(p_s_sb))) { |
| 2433 | /* Note that it is required for blocksize of primary fs device and journal |
| 2434 | device to be the same */ |
| 2435 | d_bh = |
| 2436 | reiserfs_breada(journal->j_dev_bd, cur_dblock, |
| 2437 | p_s_sb->s_blocksize, |
| 2438 | SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + |
| 2439 | SB_ONDISK_JOURNAL_SIZE(p_s_sb)); |
| 2440 | ret = |
| 2441 | journal_transaction_is_valid(p_s_sb, d_bh, |
| 2442 | &oldest_invalid_trans_id, |
| 2443 | &newest_mount_id); |
| 2444 | if (ret == 1) { |
| 2445 | desc = (struct reiserfs_journal_desc *)d_bh->b_data; |
| 2446 | if (oldest_start == 0) { /* init all oldest_ values */ |
| 2447 | oldest_trans_id = get_desc_trans_id(desc); |
| 2448 | oldest_start = d_bh->b_blocknr; |
| 2449 | newest_mount_id = get_desc_mount_id(desc); |
| 2450 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, |
| 2451 | "journal-1179: Setting " |
| 2452 | "oldest_start to offset %llu, trans_id %lu", |
| 2453 | oldest_start - |
| 2454 | SB_ONDISK_JOURNAL_1st_BLOCK |
| 2455 | (p_s_sb), oldest_trans_id); |
| 2456 | } else if (oldest_trans_id > get_desc_trans_id(desc)) { |
| 2457 | /* one we just read was older */ |
| 2458 | oldest_trans_id = get_desc_trans_id(desc); |
| 2459 | oldest_start = d_bh->b_blocknr; |
| 2460 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, |
| 2461 | "journal-1180: Resetting " |
| 2462 | "oldest_start to offset %lu, trans_id %lu", |
| 2463 | oldest_start - |
| 2464 | SB_ONDISK_JOURNAL_1st_BLOCK |
| 2465 | (p_s_sb), oldest_trans_id); |
| 2466 | } |
| 2467 | if (newest_mount_id < get_desc_mount_id(desc)) { |
| 2468 | newest_mount_id = get_desc_mount_id(desc); |
| 2469 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, |
| 2470 | "journal-1299: Setting " |
| 2471 | "newest_mount_id to %d", |
| 2472 | get_desc_mount_id(desc)); |
| 2473 | } |
| 2474 | cur_dblock += get_desc_trans_len(desc) + 2; |
| 2475 | } else { |
| 2476 | cur_dblock++; |
| 2477 | } |
| 2478 | brelse(d_bh); |
| 2479 | } |
| 2480 | |
| 2481 | start_log_replay: |
| 2482 | cur_dblock = oldest_start; |
| 2483 | if (oldest_trans_id) { |
| 2484 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, |
| 2485 | "journal-1206: Starting replay " |
| 2486 | "from offset %llu, trans_id %lu", |
| 2487 | cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), |
| 2488 | oldest_trans_id); |
| 2489 | |
| 2490 | } |
| 2491 | replay_count = 0; |
| 2492 | while (continue_replay && oldest_trans_id > 0) { |
| 2493 | ret = |
| 2494 | journal_read_transaction(p_s_sb, cur_dblock, oldest_start, |
| 2495 | oldest_trans_id, newest_mount_id); |
| 2496 | if (ret < 0) { |
| 2497 | return ret; |
| 2498 | } else if (ret != 0) { |
| 2499 | break; |
| 2500 | } |
| 2501 | cur_dblock = |
| 2502 | SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + journal->j_start; |
| 2503 | replay_count++; |
| 2504 | if (cur_dblock == oldest_start) |
| 2505 | break; |
| 2506 | } |
| 2507 | |
| 2508 | if (oldest_trans_id == 0) { |
| 2509 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, |
| 2510 | "journal-1225: No valid " "transactions found"); |
| 2511 | } |
| 2512 | /* j_start does not get set correctly if we don't replay any transactions. |
| 2513 | ** if we had a valid journal_header, set j_start to the first unflushed transaction value, |
| 2514 | ** copy the trans_id from the header |
| 2515 | */ |
| 2516 | if (valid_journal_header && replay_count == 0) { |
| 2517 | journal->j_start = le32_to_cpu(jh->j_first_unflushed_offset); |
| 2518 | journal->j_trans_id = |
| 2519 | le32_to_cpu(jh->j_last_flush_trans_id) + 1; |
Alexander Zarochentsev | a44c94a | 2006-03-25 03:06:59 -0800 | [diff] [blame] | 2520 | /* check for trans_id overflow */ |
| 2521 | if (journal->j_trans_id == 0) |
| 2522 | journal->j_trans_id = 10; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2523 | journal->j_last_flush_trans_id = |
| 2524 | le32_to_cpu(jh->j_last_flush_trans_id); |
| 2525 | journal->j_mount_id = le32_to_cpu(jh->j_mount_id) + 1; |
| 2526 | } else { |
| 2527 | journal->j_mount_id = newest_mount_id + 1; |
| 2528 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2529 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1299: Setting " |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2530 | "newest_mount_id to %lu", journal->j_mount_id); |
| 2531 | journal->j_first_unflushed_offset = journal->j_start; |
| 2532 | if (replay_count > 0) { |
| 2533 | reiserfs_info(p_s_sb, |
| 2534 | "replayed %d transactions in %lu seconds\n", |
| 2535 | replay_count, get_seconds() - start); |
| 2536 | } |
| 2537 | if (!bdev_read_only(p_s_sb->s_bdev) && |
| 2538 | _update_journal_header_block(p_s_sb, journal->j_start, |
| 2539 | journal->j_last_flush_trans_id)) { |
| 2540 | /* replay failed, caller must call free_journal_ram and abort |
| 2541 | ** the mount |
| 2542 | */ |
| 2543 | return -1; |
| 2544 | } |
| 2545 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2546 | } |
| 2547 | |
| 2548 | static struct reiserfs_journal_list *alloc_journal_list(struct super_block *s) |
| 2549 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2550 | struct reiserfs_journal_list *jl; |
Pekka Enberg | 8c777cc | 2006-02-01 03:06:43 -0800 | [diff] [blame] | 2551 | jl = kzalloc(sizeof(struct reiserfs_journal_list), |
| 2552 | GFP_NOFS | __GFP_NOFAIL); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2553 | INIT_LIST_HEAD(&jl->j_list); |
| 2554 | INIT_LIST_HEAD(&jl->j_working_list); |
| 2555 | INIT_LIST_HEAD(&jl->j_tail_bh_list); |
| 2556 | INIT_LIST_HEAD(&jl->j_bh_list); |
Jeff Mahoney | 90415de | 2008-07-25 01:46:40 -0700 | [diff] [blame] | 2557 | mutex_init(&jl->j_commit_mutex); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2558 | SB_JOURNAL(s)->j_num_lists++; |
| 2559 | get_journal_list(jl); |
| 2560 | return jl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2561 | } |
| 2562 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2563 | static void journal_list_init(struct super_block *p_s_sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2564 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2565 | SB_JOURNAL(p_s_sb)->j_current_jl = alloc_journal_list(p_s_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2566 | } |
| 2567 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2568 | static int release_journal_dev(struct super_block *super, |
| 2569 | struct reiserfs_journal *journal) |
| 2570 | { |
| 2571 | int result; |
| 2572 | |
| 2573 | result = 0; |
| 2574 | |
Christoph Hellwig | 86098fa | 2008-04-30 00:54:46 -0700 | [diff] [blame] | 2575 | if (journal->j_dev_bd != NULL) { |
| 2576 | if (journal->j_dev_bd->bd_dev != super->s_dev) |
| 2577 | bd_release(journal->j_dev_bd); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2578 | result = blkdev_put(journal->j_dev_bd); |
| 2579 | journal->j_dev_bd = NULL; |
| 2580 | } |
| 2581 | |
| 2582 | if (result != 0) { |
| 2583 | reiserfs_warning(super, |
| 2584 | "sh-457: release_journal_dev: Cannot release journal device: %i", |
| 2585 | result); |
| 2586 | } |
| 2587 | return result; |
| 2588 | } |
| 2589 | |
| 2590 | static int journal_init_dev(struct super_block *super, |
| 2591 | struct reiserfs_journal *journal, |
| 2592 | const char *jdev_name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2593 | { |
| 2594 | int result; |
| 2595 | dev_t jdev; |
| 2596 | int blkdev_mode = FMODE_READ | FMODE_WRITE; |
| 2597 | char b[BDEVNAME_SIZE]; |
| 2598 | |
| 2599 | result = 0; |
| 2600 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2601 | journal->j_dev_bd = NULL; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2602 | jdev = SB_ONDISK_JOURNAL_DEVICE(super) ? |
| 2603 | new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super)) : super->s_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2604 | |
| 2605 | if (bdev_read_only(super->s_bdev)) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2606 | blkdev_mode = FMODE_READ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2607 | |
| 2608 | /* there is no "jdev" option and journal is on separate device */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2609 | if ((!jdev_name || !jdev_name[0])) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2610 | journal->j_dev_bd = open_by_devnum(jdev, blkdev_mode); |
| 2611 | if (IS_ERR(journal->j_dev_bd)) { |
| 2612 | result = PTR_ERR(journal->j_dev_bd); |
| 2613 | journal->j_dev_bd = NULL; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2614 | reiserfs_warning(super, "sh-458: journal_init_dev: " |
| 2615 | "cannot init journal device '%s': %i", |
| 2616 | __bdevname(jdev, b), result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2617 | return result; |
Christoph Hellwig | 86098fa | 2008-04-30 00:54:46 -0700 | [diff] [blame] | 2618 | } else if (jdev != super->s_dev) { |
| 2619 | result = bd_claim(journal->j_dev_bd, journal); |
| 2620 | if (result) { |
| 2621 | blkdev_put(journal->j_dev_bd); |
| 2622 | return result; |
| 2623 | } |
| 2624 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2625 | set_blocksize(journal->j_dev_bd, super->s_blocksize); |
Christoph Hellwig | 86098fa | 2008-04-30 00:54:46 -0700 | [diff] [blame] | 2626 | } |
| 2627 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2628 | return 0; |
| 2629 | } |
| 2630 | |
Christoph Hellwig | 86098fa | 2008-04-30 00:54:46 -0700 | [diff] [blame] | 2631 | journal->j_dev_bd = open_bdev_excl(jdev_name, 0, journal); |
| 2632 | if (IS_ERR(journal->j_dev_bd)) { |
| 2633 | result = PTR_ERR(journal->j_dev_bd); |
| 2634 | journal->j_dev_bd = NULL; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2635 | reiserfs_warning(super, |
| 2636 | "journal_init_dev: Cannot open '%s': %i", |
| 2637 | jdev_name, result); |
Christoph Hellwig | 86098fa | 2008-04-30 00:54:46 -0700 | [diff] [blame] | 2638 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2639 | } |
Christoph Hellwig | 86098fa | 2008-04-30 00:54:46 -0700 | [diff] [blame] | 2640 | |
| 2641 | set_blocksize(journal->j_dev_bd, super->s_blocksize); |
| 2642 | reiserfs_info(super, |
| 2643 | "journal_init_dev: journal device: %s\n", |
| 2644 | bdevname(journal->j_dev_bd, b)); |
| 2645 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2646 | } |
| 2647 | |
Edward Shishkin | cf3d0b8 | 2007-10-16 23:30:30 -0700 | [diff] [blame] | 2648 | /** |
| 2649 | * When creating/tuning a file system user can assign some |
| 2650 | * journal params within boundaries which depend on the ratio |
| 2651 | * blocksize/standard_blocksize. |
| 2652 | * |
| 2653 | * For blocks >= standard_blocksize transaction size should |
| 2654 | * be not less then JOURNAL_TRANS_MIN_DEFAULT, and not more |
| 2655 | * then JOURNAL_TRANS_MAX_DEFAULT. |
| 2656 | * |
| 2657 | * For blocks < standard_blocksize these boundaries should be |
| 2658 | * decreased proportionally. |
| 2659 | */ |
| 2660 | #define REISERFS_STANDARD_BLKSIZE (4096) |
| 2661 | |
| 2662 | static int check_advise_trans_params(struct super_block *p_s_sb, |
| 2663 | struct reiserfs_journal *journal) |
| 2664 | { |
| 2665 | if (journal->j_trans_max) { |
| 2666 | /* Non-default journal params. |
| 2667 | Do sanity check for them. */ |
| 2668 | int ratio = 1; |
| 2669 | if (p_s_sb->s_blocksize < REISERFS_STANDARD_BLKSIZE) |
| 2670 | ratio = REISERFS_STANDARD_BLKSIZE / p_s_sb->s_blocksize; |
| 2671 | |
| 2672 | if (journal->j_trans_max > JOURNAL_TRANS_MAX_DEFAULT / ratio || |
| 2673 | journal->j_trans_max < JOURNAL_TRANS_MIN_DEFAULT / ratio || |
| 2674 | SB_ONDISK_JOURNAL_SIZE(p_s_sb) / journal->j_trans_max < |
| 2675 | JOURNAL_MIN_RATIO) { |
| 2676 | reiserfs_warning(p_s_sb, |
| 2677 | "sh-462: bad transaction max size (%u). FSCK?", |
| 2678 | journal->j_trans_max); |
| 2679 | return 1; |
| 2680 | } |
| 2681 | if (journal->j_max_batch != (journal->j_trans_max) * |
| 2682 | JOURNAL_MAX_BATCH_DEFAULT/JOURNAL_TRANS_MAX_DEFAULT) { |
| 2683 | reiserfs_warning(p_s_sb, |
| 2684 | "sh-463: bad transaction max batch (%u). FSCK?", |
| 2685 | journal->j_max_batch); |
| 2686 | return 1; |
| 2687 | } |
| 2688 | } else { |
| 2689 | /* Default journal params. |
| 2690 | The file system was created by old version |
| 2691 | of mkreiserfs, so some fields contain zeros, |
| 2692 | and we need to advise proper values for them */ |
| 2693 | if (p_s_sb->s_blocksize != REISERFS_STANDARD_BLKSIZE) |
| 2694 | reiserfs_panic(p_s_sb, "sh-464: bad blocksize (%u)", |
| 2695 | p_s_sb->s_blocksize); |
| 2696 | journal->j_trans_max = JOURNAL_TRANS_MAX_DEFAULT; |
| 2697 | journal->j_max_batch = JOURNAL_MAX_BATCH_DEFAULT; |
| 2698 | journal->j_max_commit_age = JOURNAL_MAX_COMMIT_AGE; |
| 2699 | } |
| 2700 | return 0; |
| 2701 | } |
| 2702 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2703 | /* |
| 2704 | ** must be called once on fs mount. calls journal_read for you |
| 2705 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2706 | int journal_init(struct super_block *p_s_sb, const char *j_dev_name, |
| 2707 | int old_format, unsigned int commit_max_age) |
| 2708 | { |
| 2709 | int num_cnodes = SB_ONDISK_JOURNAL_SIZE(p_s_sb) * 2; |
| 2710 | struct buffer_head *bhjh; |
| 2711 | struct reiserfs_super_block *rs; |
| 2712 | struct reiserfs_journal_header *jh; |
| 2713 | struct reiserfs_journal *journal; |
| 2714 | struct reiserfs_journal_list *jl; |
| 2715 | char b[BDEVNAME_SIZE]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2716 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2717 | journal = SB_JOURNAL(p_s_sb) = vmalloc(sizeof(struct reiserfs_journal)); |
| 2718 | if (!journal) { |
| 2719 | reiserfs_warning(p_s_sb, |
| 2720 | "journal-1256: unable to get memory for journal structure"); |
| 2721 | return 1; |
| 2722 | } |
| 2723 | memset(journal, 0, sizeof(struct reiserfs_journal)); |
| 2724 | INIT_LIST_HEAD(&journal->j_bitmap_nodes); |
| 2725 | INIT_LIST_HEAD(&journal->j_prealloc_list); |
| 2726 | INIT_LIST_HEAD(&journal->j_working_list); |
| 2727 | INIT_LIST_HEAD(&journal->j_journal_list); |
| 2728 | journal->j_persistent_trans = 0; |
| 2729 | if (reiserfs_allocate_list_bitmaps(p_s_sb, |
| 2730 | journal->j_list_bitmap, |
Jeff Mahoney | cb680c1 | 2007-10-18 23:39:27 -0700 | [diff] [blame] | 2731 | reiserfs_bmap_count(p_s_sb))) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2732 | goto free_and_return; |
| 2733 | allocate_bitmap_nodes(p_s_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2734 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2735 | /* reserved for journal area support */ |
| 2736 | SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb) = (old_format ? |
| 2737 | REISERFS_OLD_DISK_OFFSET_IN_BYTES |
| 2738 | / p_s_sb->s_blocksize + |
Jeff Mahoney | cb680c1 | 2007-10-18 23:39:27 -0700 | [diff] [blame] | 2739 | reiserfs_bmap_count(p_s_sb) + |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2740 | 1 : |
| 2741 | REISERFS_DISK_OFFSET_IN_BYTES / |
| 2742 | p_s_sb->s_blocksize + 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2743 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2744 | /* Sanity check to see is the standard journal fitting withing first bitmap |
| 2745 | (actual for small blocksizes) */ |
| 2746 | if (!SB_ONDISK_JOURNAL_DEVICE(p_s_sb) && |
| 2747 | (SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb) + |
| 2748 | SB_ONDISK_JOURNAL_SIZE(p_s_sb) > p_s_sb->s_blocksize * 8)) { |
| 2749 | reiserfs_warning(p_s_sb, |
| 2750 | "journal-1393: journal does not fit for area " |
| 2751 | "addressed by first of bitmap blocks. It starts at " |
| 2752 | "%u and its size is %u. Block size %ld", |
| 2753 | SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb), |
| 2754 | SB_ONDISK_JOURNAL_SIZE(p_s_sb), |
| 2755 | p_s_sb->s_blocksize); |
| 2756 | goto free_and_return; |
| 2757 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2758 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2759 | if (journal_init_dev(p_s_sb, journal, j_dev_name) != 0) { |
| 2760 | reiserfs_warning(p_s_sb, |
| 2761 | "sh-462: unable to initialize jornal device"); |
| 2762 | goto free_and_return; |
| 2763 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2764 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2765 | rs = SB_DISK_SUPER_BLOCK(p_s_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2766 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2767 | /* read journal header */ |
| 2768 | bhjh = journal_bread(p_s_sb, |
| 2769 | SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + |
| 2770 | SB_ONDISK_JOURNAL_SIZE(p_s_sb)); |
| 2771 | if (!bhjh) { |
| 2772 | reiserfs_warning(p_s_sb, |
| 2773 | "sh-459: unable to read journal header"); |
| 2774 | goto free_and_return; |
| 2775 | } |
| 2776 | jh = (struct reiserfs_journal_header *)(bhjh->b_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2777 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2778 | /* make sure that journal matches to the super block */ |
| 2779 | if (is_reiserfs_jr(rs) |
| 2780 | && (le32_to_cpu(jh->jh_journal.jp_journal_magic) != |
| 2781 | sb_jp_journal_magic(rs))) { |
| 2782 | reiserfs_warning(p_s_sb, |
| 2783 | "sh-460: journal header magic %x " |
| 2784 | "(device %s) does not match to magic found in super " |
| 2785 | "block %x", jh->jh_journal.jp_journal_magic, |
| 2786 | bdevname(journal->j_dev_bd, b), |
| 2787 | sb_jp_journal_magic(rs)); |
| 2788 | brelse(bhjh); |
| 2789 | goto free_and_return; |
| 2790 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2791 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2792 | journal->j_trans_max = le32_to_cpu(jh->jh_journal.jp_journal_trans_max); |
| 2793 | journal->j_max_batch = le32_to_cpu(jh->jh_journal.jp_journal_max_batch); |
| 2794 | journal->j_max_commit_age = |
| 2795 | le32_to_cpu(jh->jh_journal.jp_journal_max_commit_age); |
| 2796 | journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2797 | |
Edward Shishkin | cf3d0b8 | 2007-10-16 23:30:30 -0700 | [diff] [blame] | 2798 | if (check_advise_trans_params(p_s_sb, journal) != 0) |
| 2799 | goto free_and_return; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2800 | journal->j_default_max_commit_age = journal->j_max_commit_age; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2801 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2802 | if (commit_max_age != 0) { |
| 2803 | journal->j_max_commit_age = commit_max_age; |
| 2804 | journal->j_max_trans_age = commit_max_age; |
| 2805 | } |
| 2806 | |
| 2807 | reiserfs_info(p_s_sb, "journal params: device %s, size %u, " |
| 2808 | "journal first block %u, max trans len %u, max batch %u, " |
| 2809 | "max commit age %u, max trans age %u\n", |
| 2810 | bdevname(journal->j_dev_bd, b), |
| 2811 | SB_ONDISK_JOURNAL_SIZE(p_s_sb), |
| 2812 | SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), |
| 2813 | journal->j_trans_max, |
| 2814 | journal->j_max_batch, |
| 2815 | journal->j_max_commit_age, journal->j_max_trans_age); |
| 2816 | |
| 2817 | brelse(bhjh); |
| 2818 | |
| 2819 | journal->j_list_bitmap_index = 0; |
| 2820 | journal_list_init(p_s_sb); |
| 2821 | |
| 2822 | memset(journal->j_list_hash_table, 0, |
| 2823 | JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)); |
| 2824 | |
| 2825 | INIT_LIST_HEAD(&journal->j_dirty_buffers); |
| 2826 | spin_lock_init(&journal->j_dirty_buffers_lock); |
| 2827 | |
| 2828 | journal->j_start = 0; |
| 2829 | journal->j_len = 0; |
| 2830 | journal->j_len_alloc = 0; |
| 2831 | atomic_set(&(journal->j_wcount), 0); |
| 2832 | atomic_set(&(journal->j_async_throttle), 0); |
| 2833 | journal->j_bcount = 0; |
| 2834 | journal->j_trans_start_time = 0; |
| 2835 | journal->j_last = NULL; |
| 2836 | journal->j_first = NULL; |
| 2837 | init_waitqueue_head(&(journal->j_join_wait)); |
Jeff Mahoney | f68215c | 2008-07-25 01:46:38 -0700 | [diff] [blame] | 2838 | mutex_init(&journal->j_mutex); |
Jeff Mahoney | afe7025 | 2008-07-25 01:46:39 -0700 | [diff] [blame] | 2839 | mutex_init(&journal->j_flush_mutex); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2840 | |
| 2841 | journal->j_trans_id = 10; |
| 2842 | journal->j_mount_id = 10; |
| 2843 | journal->j_state = 0; |
| 2844 | atomic_set(&(journal->j_jlock), 0); |
| 2845 | journal->j_cnode_free_list = allocate_cnodes(num_cnodes); |
| 2846 | journal->j_cnode_free_orig = journal->j_cnode_free_list; |
| 2847 | journal->j_cnode_free = journal->j_cnode_free_list ? num_cnodes : 0; |
| 2848 | journal->j_cnode_used = 0; |
| 2849 | journal->j_must_wait = 0; |
| 2850 | |
Jeff Mahoney | 576f6d7 | 2005-11-29 19:34:39 -0800 | [diff] [blame] | 2851 | if (journal->j_cnode_free == 0) { |
| 2852 | reiserfs_warning(p_s_sb, "journal-2004: Journal cnode memory " |
| 2853 | "allocation failed (%ld bytes). Journal is " |
| 2854 | "too large for available memory. Usually " |
| 2855 | "this is due to a journal that is too large.", |
| 2856 | sizeof (struct reiserfs_journal_cnode) * num_cnodes); |
| 2857 | goto free_and_return; |
| 2858 | } |
| 2859 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2860 | init_journal_hash(p_s_sb); |
| 2861 | jl = journal->j_current_jl; |
| 2862 | jl->j_list_bitmap = get_list_bitmap(p_s_sb, jl); |
| 2863 | if (!jl->j_list_bitmap) { |
| 2864 | reiserfs_warning(p_s_sb, |
| 2865 | "journal-2005, get_list_bitmap failed for journal list 0"); |
| 2866 | goto free_and_return; |
| 2867 | } |
| 2868 | if (journal_read(p_s_sb) < 0) { |
| 2869 | reiserfs_warning(p_s_sb, "Replay Failure, unable to mount"); |
| 2870 | goto free_and_return; |
| 2871 | } |
| 2872 | |
| 2873 | reiserfs_mounted_fs_count++; |
| 2874 | if (reiserfs_mounted_fs_count <= 1) |
| 2875 | commit_wq = create_workqueue("reiserfs"); |
| 2876 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2877 | INIT_DELAYED_WORK(&journal->j_work, flush_async_commits); |
| 2878 | journal->j_work_sb = p_s_sb; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2879 | return 0; |
| 2880 | free_and_return: |
| 2881 | free_journal_ram(p_s_sb); |
| 2882 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2883 | } |
| 2884 | |
| 2885 | /* |
| 2886 | ** test for a polite end of the current transaction. Used by file_write, and should |
| 2887 | ** be used by delete to make sure they don't write more than can fit inside a single |
| 2888 | ** transaction |
| 2889 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2890 | int journal_transaction_should_end(struct reiserfs_transaction_handle *th, |
| 2891 | int new_alloc) |
| 2892 | { |
| 2893 | struct reiserfs_journal *journal = SB_JOURNAL(th->t_super); |
| 2894 | time_t now = get_seconds(); |
| 2895 | /* cannot restart while nested */ |
| 2896 | BUG_ON(!th->t_trans_id); |
| 2897 | if (th->t_refcount > 1) |
| 2898 | return 0; |
| 2899 | if (journal->j_must_wait > 0 || |
| 2900 | (journal->j_len_alloc + new_alloc) >= journal->j_max_batch || |
| 2901 | atomic_read(&(journal->j_jlock)) || |
| 2902 | (now - journal->j_trans_start_time) > journal->j_max_trans_age || |
| 2903 | journal->j_cnode_free < (journal->j_trans_max * 3)) { |
| 2904 | return 1; |
| 2905 | } |
Chris Mason | 6ae1ea4 | 2006-02-01 03:06:50 -0800 | [diff] [blame] | 2906 | /* protected by the BKL here */ |
| 2907 | journal->j_len_alloc += new_alloc; |
| 2908 | th->t_blocks_allocated += new_alloc ; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2909 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2910 | } |
| 2911 | |
| 2912 | /* this must be called inside a transaction, and requires the |
| 2913 | ** kernel_lock to be held |
| 2914 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2915 | void reiserfs_block_writes(struct reiserfs_transaction_handle *th) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2916 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2917 | struct reiserfs_journal *journal = SB_JOURNAL(th->t_super); |
| 2918 | BUG_ON(!th->t_trans_id); |
| 2919 | journal->j_must_wait = 1; |
| 2920 | set_bit(J_WRITERS_BLOCKED, &journal->j_state); |
| 2921 | return; |
| 2922 | } |
| 2923 | |
| 2924 | /* this must be called without a transaction started, and does not |
| 2925 | ** require BKL |
| 2926 | */ |
| 2927 | void reiserfs_allow_writes(struct super_block *s) |
| 2928 | { |
| 2929 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
| 2930 | clear_bit(J_WRITERS_BLOCKED, &journal->j_state); |
| 2931 | wake_up(&journal->j_join_wait); |
| 2932 | } |
| 2933 | |
| 2934 | /* this must be called without a transaction started, and does not |
| 2935 | ** require BKL |
| 2936 | */ |
| 2937 | void reiserfs_wait_on_write_block(struct super_block *s) |
| 2938 | { |
| 2939 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
| 2940 | wait_event(journal->j_join_wait, |
| 2941 | !test_bit(J_WRITERS_BLOCKED, &journal->j_state)); |
| 2942 | } |
| 2943 | |
| 2944 | static void queue_log_writer(struct super_block *s) |
| 2945 | { |
| 2946 | wait_queue_t wait; |
| 2947 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
| 2948 | set_bit(J_WRITERS_QUEUED, &journal->j_state); |
| 2949 | |
| 2950 | /* |
| 2951 | * we don't want to use wait_event here because |
| 2952 | * we only want to wait once. |
| 2953 | */ |
| 2954 | init_waitqueue_entry(&wait, current); |
| 2955 | add_wait_queue(&journal->j_join_wait, &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2956 | set_current_state(TASK_UNINTERRUPTIBLE); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2957 | if (test_bit(J_WRITERS_QUEUED, &journal->j_state)) |
| 2958 | schedule(); |
Milind Arun Choudhary | 5ab2f7e | 2007-05-08 00:30:51 -0700 | [diff] [blame] | 2959 | __set_current_state(TASK_RUNNING); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2960 | remove_wait_queue(&journal->j_join_wait, &wait); |
| 2961 | } |
| 2962 | |
| 2963 | static void wake_queued_writers(struct super_block *s) |
| 2964 | { |
| 2965 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
| 2966 | if (test_and_clear_bit(J_WRITERS_QUEUED, &journal->j_state)) |
| 2967 | wake_up(&journal->j_join_wait); |
| 2968 | } |
| 2969 | |
| 2970 | static void let_transaction_grow(struct super_block *sb, unsigned long trans_id) |
| 2971 | { |
| 2972 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
| 2973 | unsigned long bcount = journal->j_bcount; |
| 2974 | while (1) { |
Nishanth Aravamudan | 041e0e3 | 2005-09-10 00:27:23 -0700 | [diff] [blame] | 2975 | schedule_timeout_uninterruptible(1); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2976 | journal->j_current_jl->j_state |= LIST_COMMIT_PENDING; |
| 2977 | while ((atomic_read(&journal->j_wcount) > 0 || |
| 2978 | atomic_read(&journal->j_jlock)) && |
| 2979 | journal->j_trans_id == trans_id) { |
| 2980 | queue_log_writer(sb); |
| 2981 | } |
| 2982 | if (journal->j_trans_id != trans_id) |
| 2983 | break; |
| 2984 | if (bcount == journal->j_bcount) |
| 2985 | break; |
| 2986 | bcount = journal->j_bcount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2987 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2988 | } |
| 2989 | |
| 2990 | /* join == true if you must join an existing transaction. |
| 2991 | ** join == false if you can deal with waiting for others to finish |
| 2992 | ** |
| 2993 | ** this will block until the transaction is joinable. send the number of blocks you |
| 2994 | ** expect to use in nblocks. |
| 2995 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2996 | static int do_journal_begin_r(struct reiserfs_transaction_handle *th, |
| 2997 | struct super_block *p_s_sb, unsigned long nblocks, |
| 2998 | int join) |
| 2999 | { |
| 3000 | time_t now = get_seconds(); |
| 3001 | int old_trans_id; |
| 3002 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
| 3003 | struct reiserfs_transaction_handle myth; |
| 3004 | int sched_count = 0; |
| 3005 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3006 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3007 | reiserfs_check_lock_depth(p_s_sb, "journal_begin"); |
Eric Sesterhenn | 14a6144 | 2006-10-03 23:36:38 +0200 | [diff] [blame] | 3008 | BUG_ON(nblocks > journal->j_trans_max); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3009 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3010 | PROC_INFO_INC(p_s_sb, journal.journal_being); |
| 3011 | /* set here for journal_join */ |
| 3012 | th->t_refcount = 1; |
| 3013 | th->t_super = p_s_sb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3014 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3015 | relock: |
| 3016 | lock_journal(p_s_sb); |
| 3017 | if (join != JBEGIN_ABORT && reiserfs_is_journal_aborted(journal)) { |
| 3018 | unlock_journal(p_s_sb); |
| 3019 | retval = journal->j_errno; |
| 3020 | goto out_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3021 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3022 | journal->j_bcount++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3023 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3024 | if (test_bit(J_WRITERS_BLOCKED, &journal->j_state)) { |
| 3025 | unlock_journal(p_s_sb); |
| 3026 | reiserfs_wait_on_write_block(p_s_sb); |
| 3027 | PROC_INFO_INC(p_s_sb, journal.journal_relock_writers); |
| 3028 | goto relock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3029 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3030 | now = get_seconds(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3031 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3032 | /* if there is no room in the journal OR |
| 3033 | ** if this transaction is too old, and we weren't called joinable, wait for it to finish before beginning |
| 3034 | ** we don't sleep if there aren't other writers |
| 3035 | */ |
| 3036 | |
| 3037 | if ((!join && journal->j_must_wait > 0) || |
| 3038 | (!join |
| 3039 | && (journal->j_len_alloc + nblocks + 2) >= journal->j_max_batch) |
| 3040 | || (!join && atomic_read(&journal->j_wcount) > 0 |
| 3041 | && journal->j_trans_start_time > 0 |
| 3042 | && (now - journal->j_trans_start_time) > |
| 3043 | journal->j_max_trans_age) || (!join |
| 3044 | && atomic_read(&journal->j_jlock)) |
| 3045 | || (!join && journal->j_cnode_free < (journal->j_trans_max * 3))) { |
| 3046 | |
| 3047 | old_trans_id = journal->j_trans_id; |
| 3048 | unlock_journal(p_s_sb); /* allow others to finish this transaction */ |
| 3049 | |
| 3050 | if (!join && (journal->j_len_alloc + nblocks + 2) >= |
| 3051 | journal->j_max_batch && |
| 3052 | ((journal->j_len + nblocks + 2) * 100) < |
| 3053 | (journal->j_len_alloc * 75)) { |
| 3054 | if (atomic_read(&journal->j_wcount) > 10) { |
| 3055 | sched_count++; |
| 3056 | queue_log_writer(p_s_sb); |
| 3057 | goto relock; |
| 3058 | } |
| 3059 | } |
| 3060 | /* don't mess with joining the transaction if all we have to do is |
| 3061 | * wait for someone else to do a commit |
| 3062 | */ |
| 3063 | if (atomic_read(&journal->j_jlock)) { |
| 3064 | while (journal->j_trans_id == old_trans_id && |
| 3065 | atomic_read(&journal->j_jlock)) { |
| 3066 | queue_log_writer(p_s_sb); |
| 3067 | } |
| 3068 | goto relock; |
| 3069 | } |
| 3070 | retval = journal_join(&myth, p_s_sb, 1); |
| 3071 | if (retval) |
| 3072 | goto out_fail; |
| 3073 | |
| 3074 | /* someone might have ended the transaction while we joined */ |
| 3075 | if (old_trans_id != journal->j_trans_id) { |
| 3076 | retval = do_journal_end(&myth, p_s_sb, 1, 0); |
| 3077 | } else { |
| 3078 | retval = do_journal_end(&myth, p_s_sb, 1, COMMIT_NOW); |
| 3079 | } |
| 3080 | |
| 3081 | if (retval) |
| 3082 | goto out_fail; |
| 3083 | |
| 3084 | PROC_INFO_INC(p_s_sb, journal.journal_relock_wcount); |
| 3085 | goto relock; |
| 3086 | } |
| 3087 | /* we are the first writer, set trans_id */ |
| 3088 | if (journal->j_trans_start_time == 0) { |
| 3089 | journal->j_trans_start_time = get_seconds(); |
| 3090 | } |
| 3091 | atomic_inc(&(journal->j_wcount)); |
| 3092 | journal->j_len_alloc += nblocks; |
| 3093 | th->t_blocks_logged = 0; |
| 3094 | th->t_blocks_allocated = nblocks; |
| 3095 | th->t_trans_id = journal->j_trans_id; |
| 3096 | unlock_journal(p_s_sb); |
| 3097 | INIT_LIST_HEAD(&th->t_list); |
| 3098 | get_fs_excl(); |
| 3099 | return 0; |
| 3100 | |
| 3101 | out_fail: |
| 3102 | memset(th, 0, sizeof(*th)); |
| 3103 | /* Re-set th->t_super, so we can properly keep track of how many |
| 3104 | * persistent transactions there are. We need to do this so if this |
| 3105 | * call is part of a failed restart_transaction, we can free it later */ |
| 3106 | th->t_super = p_s_sb; |
| 3107 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3108 | } |
| 3109 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3110 | struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct |
| 3111 | super_block |
| 3112 | *s, |
| 3113 | int nblocks) |
| 3114 | { |
| 3115 | int ret; |
| 3116 | struct reiserfs_transaction_handle *th; |
| 3117 | |
| 3118 | /* if we're nesting into an existing transaction. It will be |
| 3119 | ** persistent on its own |
| 3120 | */ |
| 3121 | if (reiserfs_transaction_running(s)) { |
| 3122 | th = current->journal_info; |
| 3123 | th->t_refcount++; |
Eric Sesterhenn | 14a6144 | 2006-10-03 23:36:38 +0200 | [diff] [blame] | 3124 | BUG_ON(th->t_refcount < 2); |
| 3125 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3126 | return th; |
| 3127 | } |
Pekka Enberg | d739b42 | 2006-02-01 03:06:43 -0800 | [diff] [blame] | 3128 | th = kmalloc(sizeof(struct reiserfs_transaction_handle), GFP_NOFS); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3129 | if (!th) |
| 3130 | return NULL; |
| 3131 | ret = journal_begin(th, s, nblocks); |
| 3132 | if (ret) { |
Pekka Enberg | d739b42 | 2006-02-01 03:06:43 -0800 | [diff] [blame] | 3133 | kfree(th); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3134 | return NULL; |
| 3135 | } |
| 3136 | |
| 3137 | SB_JOURNAL(s)->j_persistent_trans++; |
| 3138 | return th; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3139 | } |
| 3140 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3141 | int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *th) |
| 3142 | { |
| 3143 | struct super_block *s = th->t_super; |
| 3144 | int ret = 0; |
| 3145 | if (th->t_trans_id) |
| 3146 | ret = journal_end(th, th->t_super, th->t_blocks_allocated); |
| 3147 | else |
| 3148 | ret = -EIO; |
| 3149 | if (th->t_refcount == 0) { |
| 3150 | SB_JOURNAL(s)->j_persistent_trans--; |
Pekka Enberg | d739b42 | 2006-02-01 03:06:43 -0800 | [diff] [blame] | 3151 | kfree(th); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3152 | } |
| 3153 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3154 | } |
| 3155 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3156 | static int journal_join(struct reiserfs_transaction_handle *th, |
| 3157 | struct super_block *p_s_sb, unsigned long nblocks) |
| 3158 | { |
| 3159 | struct reiserfs_transaction_handle *cur_th = current->journal_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3160 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3161 | /* this keeps do_journal_end from NULLing out the current->journal_info |
| 3162 | ** pointer |
| 3163 | */ |
| 3164 | th->t_handle_save = cur_th; |
Eric Sesterhenn | 14a6144 | 2006-10-03 23:36:38 +0200 | [diff] [blame] | 3165 | BUG_ON(cur_th && cur_th->t_refcount > 1); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3166 | return do_journal_begin_r(th, p_s_sb, nblocks, JBEGIN_JOIN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3167 | } |
| 3168 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3169 | int journal_join_abort(struct reiserfs_transaction_handle *th, |
| 3170 | struct super_block *p_s_sb, unsigned long nblocks) |
| 3171 | { |
| 3172 | struct reiserfs_transaction_handle *cur_th = current->journal_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3173 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3174 | /* this keeps do_journal_end from NULLing out the current->journal_info |
| 3175 | ** pointer |
| 3176 | */ |
| 3177 | th->t_handle_save = cur_th; |
Eric Sesterhenn | 14a6144 | 2006-10-03 23:36:38 +0200 | [diff] [blame] | 3178 | BUG_ON(cur_th && cur_th->t_refcount > 1); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3179 | return do_journal_begin_r(th, p_s_sb, nblocks, JBEGIN_ABORT); |
| 3180 | } |
| 3181 | |
| 3182 | int journal_begin(struct reiserfs_transaction_handle *th, |
| 3183 | struct super_block *p_s_sb, unsigned long nblocks) |
| 3184 | { |
| 3185 | struct reiserfs_transaction_handle *cur_th = current->journal_info; |
| 3186 | int ret; |
| 3187 | |
| 3188 | th->t_handle_save = NULL; |
| 3189 | if (cur_th) { |
| 3190 | /* we are nesting into the current transaction */ |
| 3191 | if (cur_th->t_super == p_s_sb) { |
| 3192 | BUG_ON(!cur_th->t_refcount); |
| 3193 | cur_th->t_refcount++; |
| 3194 | memcpy(th, cur_th, sizeof(*th)); |
| 3195 | if (th->t_refcount <= 1) |
| 3196 | reiserfs_warning(p_s_sb, |
| 3197 | "BAD: refcount <= 1, but journal_info != 0"); |
| 3198 | return 0; |
| 3199 | } else { |
| 3200 | /* we've ended up with a handle from a different filesystem. |
| 3201 | ** save it and restore on journal_end. This should never |
| 3202 | ** really happen... |
| 3203 | */ |
| 3204 | reiserfs_warning(p_s_sb, |
| 3205 | "clm-2100: nesting info a different FS"); |
| 3206 | th->t_handle_save = current->journal_info; |
| 3207 | current->journal_info = th; |
| 3208 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3209 | } else { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3210 | current->journal_info = th; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3211 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3212 | ret = do_journal_begin_r(th, p_s_sb, nblocks, JBEGIN_REG); |
Eric Sesterhenn | 14a6144 | 2006-10-03 23:36:38 +0200 | [diff] [blame] | 3213 | BUG_ON(current->journal_info != th); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3214 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3215 | /* I guess this boils down to being the reciprocal of clm-2100 above. |
| 3216 | * If do_journal_begin_r fails, we need to put it back, since journal_end |
| 3217 | * won't be called to do it. */ |
| 3218 | if (ret) |
| 3219 | current->journal_info = th->t_handle_save; |
| 3220 | else |
| 3221 | BUG_ON(!th->t_refcount); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3222 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3223 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3224 | } |
| 3225 | |
| 3226 | /* |
| 3227 | ** puts bh into the current transaction. If it was already there, reorders removes the |
| 3228 | ** old pointers from the hash, and puts new ones in (to make sure replay happen in the right order). |
| 3229 | ** |
| 3230 | ** if it was dirty, cleans and files onto the clean list. I can't let it be dirty again until the |
| 3231 | ** transaction is committed. |
| 3232 | ** |
| 3233 | ** if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len. |
| 3234 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3235 | int journal_mark_dirty(struct reiserfs_transaction_handle *th, |
| 3236 | struct super_block *p_s_sb, struct buffer_head *bh) |
| 3237 | { |
| 3238 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
| 3239 | struct reiserfs_journal_cnode *cn = NULL; |
| 3240 | int count_already_incd = 0; |
| 3241 | int prepared = 0; |
| 3242 | BUG_ON(!th->t_trans_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3243 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3244 | PROC_INFO_INC(p_s_sb, journal.mark_dirty); |
| 3245 | if (th->t_trans_id != journal->j_trans_id) { |
| 3246 | reiserfs_panic(th->t_super, |
| 3247 | "journal-1577: handle trans id %ld != current trans id %ld\n", |
| 3248 | th->t_trans_id, journal->j_trans_id); |
| 3249 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3250 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3251 | p_s_sb->s_dirt = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3252 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3253 | prepared = test_clear_buffer_journal_prepared(bh); |
| 3254 | clear_buffer_journal_restore_dirty(bh); |
| 3255 | /* already in this transaction, we are done */ |
| 3256 | if (buffer_journaled(bh)) { |
| 3257 | PROC_INFO_INC(p_s_sb, journal.mark_dirty_already); |
| 3258 | return 0; |
| 3259 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3260 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3261 | /* this must be turned into a panic instead of a warning. We can't allow |
| 3262 | ** a dirty or journal_dirty or locked buffer to be logged, as some changes |
| 3263 | ** could get to disk too early. NOT GOOD. |
| 3264 | */ |
| 3265 | if (!prepared || buffer_dirty(bh)) { |
| 3266 | reiserfs_warning(p_s_sb, "journal-1777: buffer %llu bad state " |
| 3267 | "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT", |
| 3268 | (unsigned long long)bh->b_blocknr, |
| 3269 | prepared ? ' ' : '!', |
| 3270 | buffer_locked(bh) ? ' ' : '!', |
| 3271 | buffer_dirty(bh) ? ' ' : '!', |
| 3272 | buffer_journal_dirty(bh) ? ' ' : '!'); |
| 3273 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3274 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3275 | if (atomic_read(&(journal->j_wcount)) <= 0) { |
| 3276 | reiserfs_warning(p_s_sb, |
| 3277 | "journal-1409: journal_mark_dirty returning because j_wcount was %d", |
| 3278 | atomic_read(&(journal->j_wcount))); |
| 3279 | return 1; |
| 3280 | } |
| 3281 | /* this error means I've screwed up, and we've overflowed the transaction. |
| 3282 | ** Nothing can be done here, except make the FS readonly or panic. |
| 3283 | */ |
| 3284 | if (journal->j_len >= journal->j_trans_max) { |
| 3285 | reiserfs_panic(th->t_super, |
| 3286 | "journal-1413: journal_mark_dirty: j_len (%lu) is too big\n", |
| 3287 | journal->j_len); |
| 3288 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3289 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3290 | if (buffer_journal_dirty(bh)) { |
| 3291 | count_already_incd = 1; |
| 3292 | PROC_INFO_INC(p_s_sb, journal.mark_dirty_notjournal); |
| 3293 | clear_buffer_journal_dirty(bh); |
| 3294 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3295 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3296 | if (journal->j_len > journal->j_len_alloc) { |
| 3297 | journal->j_len_alloc = journal->j_len + JOURNAL_PER_BALANCE_CNT; |
| 3298 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3299 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3300 | set_buffer_journaled(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3301 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3302 | /* now put this guy on the end */ |
| 3303 | if (!cn) { |
| 3304 | cn = get_cnode(p_s_sb); |
| 3305 | if (!cn) { |
| 3306 | reiserfs_panic(p_s_sb, "get_cnode failed!\n"); |
| 3307 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3308 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3309 | if (th->t_blocks_logged == th->t_blocks_allocated) { |
| 3310 | th->t_blocks_allocated += JOURNAL_PER_BALANCE_CNT; |
| 3311 | journal->j_len_alloc += JOURNAL_PER_BALANCE_CNT; |
| 3312 | } |
| 3313 | th->t_blocks_logged++; |
| 3314 | journal->j_len++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3315 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3316 | cn->bh = bh; |
| 3317 | cn->blocknr = bh->b_blocknr; |
| 3318 | cn->sb = p_s_sb; |
| 3319 | cn->jlist = NULL; |
| 3320 | insert_journal_hash(journal->j_hash_table, cn); |
| 3321 | if (!count_already_incd) { |
| 3322 | get_bh(bh); |
| 3323 | } |
| 3324 | } |
| 3325 | cn->next = NULL; |
| 3326 | cn->prev = journal->j_last; |
| 3327 | cn->bh = bh; |
| 3328 | if (journal->j_last) { |
| 3329 | journal->j_last->next = cn; |
| 3330 | journal->j_last = cn; |
| 3331 | } else { |
| 3332 | journal->j_first = cn; |
| 3333 | journal->j_last = cn; |
| 3334 | } |
| 3335 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3336 | } |
| 3337 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3338 | int journal_end(struct reiserfs_transaction_handle *th, |
| 3339 | struct super_block *p_s_sb, unsigned long nblocks) |
| 3340 | { |
| 3341 | if (!current->journal_info && th->t_refcount > 1) |
| 3342 | reiserfs_warning(p_s_sb, "REISER-NESTING: th NULL, refcount %d", |
| 3343 | th->t_refcount); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3344 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3345 | if (!th->t_trans_id) { |
| 3346 | WARN_ON(1); |
| 3347 | return -EIO; |
| 3348 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3349 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3350 | th->t_refcount--; |
| 3351 | if (th->t_refcount > 0) { |
| 3352 | struct reiserfs_transaction_handle *cur_th = |
| 3353 | current->journal_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3354 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3355 | /* we aren't allowed to close a nested transaction on a different |
| 3356 | ** filesystem from the one in the task struct |
| 3357 | */ |
Eric Sesterhenn | 14a6144 | 2006-10-03 23:36:38 +0200 | [diff] [blame] | 3358 | BUG_ON(cur_th->t_super != th->t_super); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3359 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3360 | if (th != cur_th) { |
| 3361 | memcpy(current->journal_info, th, sizeof(*th)); |
| 3362 | th->t_trans_id = 0; |
| 3363 | } |
| 3364 | return 0; |
| 3365 | } else { |
| 3366 | return do_journal_end(th, p_s_sb, nblocks, 0); |
| 3367 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3368 | } |
| 3369 | |
| 3370 | /* removes from the current transaction, relsing and descrementing any counters. |
| 3371 | ** also files the removed buffer directly onto the clean list |
| 3372 | ** |
| 3373 | ** called by journal_mark_freed when a block has been deleted |
| 3374 | ** |
| 3375 | ** returns 1 if it cleaned and relsed the buffer. 0 otherwise |
| 3376 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3377 | static int remove_from_transaction(struct super_block *p_s_sb, |
| 3378 | b_blocknr_t blocknr, int already_cleaned) |
| 3379 | { |
| 3380 | struct buffer_head *bh; |
| 3381 | struct reiserfs_journal_cnode *cn; |
| 3382 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
| 3383 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3384 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3385 | cn = get_journal_hash_dev(p_s_sb, journal->j_hash_table, blocknr); |
| 3386 | if (!cn || !cn->bh) { |
| 3387 | return ret; |
| 3388 | } |
| 3389 | bh = cn->bh; |
| 3390 | if (cn->prev) { |
| 3391 | cn->prev->next = cn->next; |
| 3392 | } |
| 3393 | if (cn->next) { |
| 3394 | cn->next->prev = cn->prev; |
| 3395 | } |
| 3396 | if (cn == journal->j_first) { |
| 3397 | journal->j_first = cn->next; |
| 3398 | } |
| 3399 | if (cn == journal->j_last) { |
| 3400 | journal->j_last = cn->prev; |
| 3401 | } |
| 3402 | if (bh) |
| 3403 | remove_journal_hash(p_s_sb, journal->j_hash_table, NULL, |
| 3404 | bh->b_blocknr, 0); |
| 3405 | clear_buffer_journaled(bh); /* don't log this one */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3406 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3407 | if (!already_cleaned) { |
| 3408 | clear_buffer_journal_dirty(bh); |
| 3409 | clear_buffer_dirty(bh); |
| 3410 | clear_buffer_journal_test(bh); |
| 3411 | put_bh(bh); |
| 3412 | if (atomic_read(&(bh->b_count)) < 0) { |
| 3413 | reiserfs_warning(p_s_sb, |
| 3414 | "journal-1752: remove from trans, b_count < 0"); |
| 3415 | } |
| 3416 | ret = 1; |
| 3417 | } |
| 3418 | journal->j_len--; |
| 3419 | journal->j_len_alloc--; |
| 3420 | free_cnode(p_s_sb, cn); |
| 3421 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3422 | } |
| 3423 | |
| 3424 | /* |
| 3425 | ** for any cnode in a journal list, it can only be dirtied of all the |
Matt LaPlante | 0779bf2 | 2006-11-30 05:24:39 +0100 | [diff] [blame] | 3426 | ** transactions that include it are committed to disk. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3427 | ** this checks through each transaction, and returns 1 if you are allowed to dirty, |
| 3428 | ** and 0 if you aren't |
| 3429 | ** |
| 3430 | ** it is called by dirty_journal_list, which is called after flush_commit_list has gotten all the log |
| 3431 | ** blocks for a given transaction on disk |
| 3432 | ** |
| 3433 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3434 | static int can_dirty(struct reiserfs_journal_cnode *cn) |
| 3435 | { |
| 3436 | struct super_block *sb = cn->sb; |
| 3437 | b_blocknr_t blocknr = cn->blocknr; |
| 3438 | struct reiserfs_journal_cnode *cur = cn->hprev; |
| 3439 | int can_dirty = 1; |
| 3440 | |
| 3441 | /* first test hprev. These are all newer than cn, so any node here |
| 3442 | ** with the same block number and dev means this node can't be sent |
| 3443 | ** to disk right now. |
| 3444 | */ |
| 3445 | while (cur && can_dirty) { |
| 3446 | if (cur->jlist && cur->bh && cur->blocknr && cur->sb == sb && |
| 3447 | cur->blocknr == blocknr) { |
| 3448 | can_dirty = 0; |
| 3449 | } |
| 3450 | cur = cur->hprev; |
| 3451 | } |
| 3452 | /* then test hnext. These are all older than cn. As long as they |
| 3453 | ** are committed to the log, it is safe to write cn to disk |
| 3454 | */ |
| 3455 | cur = cn->hnext; |
| 3456 | while (cur && can_dirty) { |
| 3457 | if (cur->jlist && cur->jlist->j_len > 0 && |
| 3458 | atomic_read(&(cur->jlist->j_commit_left)) > 0 && cur->bh && |
| 3459 | cur->blocknr && cur->sb == sb && cur->blocknr == blocknr) { |
| 3460 | can_dirty = 0; |
| 3461 | } |
| 3462 | cur = cur->hnext; |
| 3463 | } |
| 3464 | return can_dirty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3465 | } |
| 3466 | |
| 3467 | /* syncs the commit blocks, but does not force the real buffers to disk |
Matt LaPlante | 0779bf2 | 2006-11-30 05:24:39 +0100 | [diff] [blame] | 3468 | ** will wait until the current transaction is done/committed before returning |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3469 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3470 | int journal_end_sync(struct reiserfs_transaction_handle *th, |
| 3471 | struct super_block *p_s_sb, unsigned long nblocks) |
| 3472 | { |
| 3473 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3474 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3475 | BUG_ON(!th->t_trans_id); |
| 3476 | /* you can sync while nested, very, very bad */ |
Eric Sesterhenn | 14a6144 | 2006-10-03 23:36:38 +0200 | [diff] [blame] | 3477 | BUG_ON(th->t_refcount > 1); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3478 | if (journal->j_len == 0) { |
| 3479 | reiserfs_prepare_for_journal(p_s_sb, SB_BUFFER_WITH_SB(p_s_sb), |
| 3480 | 1); |
| 3481 | journal_mark_dirty(th, p_s_sb, SB_BUFFER_WITH_SB(p_s_sb)); |
| 3482 | } |
| 3483 | return do_journal_end(th, p_s_sb, nblocks, COMMIT_NOW | WAIT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3484 | } |
| 3485 | |
| 3486 | /* |
| 3487 | ** writeback the pending async commits to disk |
| 3488 | */ |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 3489 | static void flush_async_commits(struct work_struct *work) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3490 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 3491 | struct reiserfs_journal *journal = |
| 3492 | container_of(work, struct reiserfs_journal, j_work.work); |
| 3493 | struct super_block *p_s_sb = journal->j_work_sb; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3494 | struct reiserfs_journal_list *jl; |
| 3495 | struct list_head *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3496 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3497 | lock_kernel(); |
| 3498 | if (!list_empty(&journal->j_journal_list)) { |
| 3499 | /* last entry is the youngest, commit it and you get everything */ |
| 3500 | entry = journal->j_journal_list.prev; |
| 3501 | jl = JOURNAL_LIST_ENTRY(entry); |
| 3502 | flush_commit_list(p_s_sb, jl, 1); |
| 3503 | } |
| 3504 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3505 | } |
| 3506 | |
| 3507 | /* |
| 3508 | ** flushes any old transactions to disk |
| 3509 | ** ends the current transaction if it is too old |
| 3510 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3511 | int reiserfs_flush_old_commits(struct super_block *p_s_sb) |
| 3512 | { |
| 3513 | time_t now; |
| 3514 | struct reiserfs_transaction_handle th; |
| 3515 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3516 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3517 | now = get_seconds(); |
| 3518 | /* safety check so we don't flush while we are replaying the log during |
| 3519 | * mount |
| 3520 | */ |
| 3521 | if (list_empty(&journal->j_journal_list)) { |
| 3522 | return 0; |
| 3523 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3524 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3525 | /* check the current transaction. If there are no writers, and it is |
| 3526 | * too old, finish it, and force the commit blocks to disk |
| 3527 | */ |
| 3528 | if (atomic_read(&journal->j_wcount) <= 0 && |
| 3529 | journal->j_trans_start_time > 0 && |
| 3530 | journal->j_len > 0 && |
| 3531 | (now - journal->j_trans_start_time) > journal->j_max_trans_age) { |
| 3532 | if (!journal_join(&th, p_s_sb, 1)) { |
| 3533 | reiserfs_prepare_for_journal(p_s_sb, |
| 3534 | SB_BUFFER_WITH_SB(p_s_sb), |
| 3535 | 1); |
| 3536 | journal_mark_dirty(&th, p_s_sb, |
| 3537 | SB_BUFFER_WITH_SB(p_s_sb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3538 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3539 | /* we're only being called from kreiserfsd, it makes no sense to do |
| 3540 | ** an async commit so that kreiserfsd can do it later |
| 3541 | */ |
| 3542 | do_journal_end(&th, p_s_sb, 1, COMMIT_NOW | WAIT); |
| 3543 | } |
| 3544 | } |
| 3545 | return p_s_sb->s_dirt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3546 | } |
| 3547 | |
| 3548 | /* |
| 3549 | ** returns 0 if do_journal_end should return right away, returns 1 if do_journal_end should finish the commit |
| 3550 | ** |
| 3551 | ** if the current transaction is too old, but still has writers, this will wait on j_join_wait until all |
| 3552 | ** the writers are done. By the time it wakes up, the transaction it was called has already ended, so it just |
| 3553 | ** flushes the commit list and returns 0. |
| 3554 | ** |
| 3555 | ** Won't batch when flush or commit_now is set. Also won't batch when others are waiting on j_join_wait. |
| 3556 | ** |
| 3557 | ** Note, we can't allow the journal_end to proceed while there are still writers in the log. |
| 3558 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3559 | static int check_journal_end(struct reiserfs_transaction_handle *th, |
| 3560 | struct super_block *p_s_sb, unsigned long nblocks, |
| 3561 | int flags) |
| 3562 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3563 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3564 | time_t now; |
| 3565 | int flush = flags & FLUSH_ALL; |
| 3566 | int commit_now = flags & COMMIT_NOW; |
| 3567 | int wait_on_commit = flags & WAIT; |
| 3568 | struct reiserfs_journal_list *jl; |
| 3569 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3570 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3571 | BUG_ON(!th->t_trans_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3572 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3573 | if (th->t_trans_id != journal->j_trans_id) { |
| 3574 | reiserfs_panic(th->t_super, |
| 3575 | "journal-1577: handle trans id %ld != current trans id %ld\n", |
| 3576 | th->t_trans_id, journal->j_trans_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3577 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3578 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3579 | journal->j_len_alloc -= (th->t_blocks_allocated - th->t_blocks_logged); |
| 3580 | if (atomic_read(&(journal->j_wcount)) > 0) { /* <= 0 is allowed. unmounting might not call begin */ |
| 3581 | atomic_dec(&(journal->j_wcount)); |
| 3582 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3583 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3584 | /* BUG, deal with case where j_len is 0, but people previously freed blocks need to be released |
| 3585 | ** will be dealt with by next transaction that actually writes something, but should be taken |
| 3586 | ** care of in this trans |
| 3587 | */ |
Eric Sesterhenn | 14a6144 | 2006-10-03 23:36:38 +0200 | [diff] [blame] | 3588 | BUG_ON(journal->j_len == 0); |
| 3589 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3590 | /* if wcount > 0, and we are called to with flush or commit_now, |
| 3591 | ** we wait on j_join_wait. We will wake up when the last writer has |
| 3592 | ** finished the transaction, and started it on its way to the disk. |
| 3593 | ** Then, we flush the commit or journal list, and just return 0 |
| 3594 | ** because the rest of journal end was already done for this transaction. |
| 3595 | */ |
| 3596 | if (atomic_read(&(journal->j_wcount)) > 0) { |
| 3597 | if (flush || commit_now) { |
| 3598 | unsigned trans_id; |
| 3599 | |
| 3600 | jl = journal->j_current_jl; |
| 3601 | trans_id = jl->j_trans_id; |
| 3602 | if (wait_on_commit) |
| 3603 | jl->j_state |= LIST_COMMIT_PENDING; |
| 3604 | atomic_set(&(journal->j_jlock), 1); |
| 3605 | if (flush) { |
| 3606 | journal->j_next_full_flush = 1; |
| 3607 | } |
| 3608 | unlock_journal(p_s_sb); |
| 3609 | |
| 3610 | /* sleep while the current transaction is still j_jlocked */ |
| 3611 | while (journal->j_trans_id == trans_id) { |
| 3612 | if (atomic_read(&journal->j_jlock)) { |
| 3613 | queue_log_writer(p_s_sb); |
| 3614 | } else { |
| 3615 | lock_journal(p_s_sb); |
| 3616 | if (journal->j_trans_id == trans_id) { |
| 3617 | atomic_set(&(journal->j_jlock), |
| 3618 | 1); |
| 3619 | } |
| 3620 | unlock_journal(p_s_sb); |
| 3621 | } |
| 3622 | } |
Eric Sesterhenn | 14a6144 | 2006-10-03 23:36:38 +0200 | [diff] [blame] | 3623 | BUG_ON(journal->j_trans_id == trans_id); |
| 3624 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3625 | if (commit_now |
| 3626 | && journal_list_still_alive(p_s_sb, trans_id) |
| 3627 | && wait_on_commit) { |
| 3628 | flush_commit_list(p_s_sb, jl, 1); |
| 3629 | } |
| 3630 | return 0; |
| 3631 | } |
| 3632 | unlock_journal(p_s_sb); |
| 3633 | return 0; |
| 3634 | } |
| 3635 | |
| 3636 | /* deal with old transactions where we are the last writers */ |
| 3637 | now = get_seconds(); |
| 3638 | if ((now - journal->j_trans_start_time) > journal->j_max_trans_age) { |
| 3639 | commit_now = 1; |
| 3640 | journal->j_next_async_flush = 1; |
| 3641 | } |
| 3642 | /* don't batch when someone is waiting on j_join_wait */ |
| 3643 | /* don't batch when syncing the commit or flushing the whole trans */ |
| 3644 | if (!(journal->j_must_wait > 0) && !(atomic_read(&(journal->j_jlock))) |
| 3645 | && !flush && !commit_now && (journal->j_len < journal->j_max_batch) |
| 3646 | && journal->j_len_alloc < journal->j_max_batch |
| 3647 | && journal->j_cnode_free > (journal->j_trans_max * 3)) { |
| 3648 | journal->j_bcount++; |
| 3649 | unlock_journal(p_s_sb); |
| 3650 | return 0; |
| 3651 | } |
| 3652 | |
| 3653 | if (journal->j_start > SB_ONDISK_JOURNAL_SIZE(p_s_sb)) { |
| 3654 | reiserfs_panic(p_s_sb, |
| 3655 | "journal-003: journal_end: j_start (%ld) is too high\n", |
| 3656 | journal->j_start); |
| 3657 | } |
| 3658 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3659 | } |
| 3660 | |
| 3661 | /* |
| 3662 | ** Does all the work that makes deleting blocks safe. |
| 3663 | ** when deleting a block mark BH_JNew, just remove it from the current transaction, clean it's buffer_head and move on. |
| 3664 | ** |
| 3665 | ** otherwise: |
| 3666 | ** set a bit for the block in the journal bitmap. That will prevent it from being allocated for unformatted nodes |
| 3667 | ** before this transaction has finished. |
| 3668 | ** |
| 3669 | ** mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers. That will prevent any old transactions with |
| 3670 | ** this block from trying to flush to the real location. Since we aren't removing the cnode from the journal_list_hash, |
| 3671 | ** the block can't be reallocated yet. |
| 3672 | ** |
| 3673 | ** Then remove it from the current transaction, decrementing any counters and filing it on the clean list. |
| 3674 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3675 | int journal_mark_freed(struct reiserfs_transaction_handle *th, |
| 3676 | struct super_block *p_s_sb, b_blocknr_t blocknr) |
| 3677 | { |
| 3678 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
| 3679 | struct reiserfs_journal_cnode *cn = NULL; |
| 3680 | struct buffer_head *bh = NULL; |
| 3681 | struct reiserfs_list_bitmap *jb = NULL; |
| 3682 | int cleaned = 0; |
| 3683 | BUG_ON(!th->t_trans_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3684 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3685 | cn = get_journal_hash_dev(p_s_sb, journal->j_hash_table, blocknr); |
| 3686 | if (cn && cn->bh) { |
| 3687 | bh = cn->bh; |
| 3688 | get_bh(bh); |
| 3689 | } |
| 3690 | /* if it is journal new, we just remove it from this transaction */ |
| 3691 | if (bh && buffer_journal_new(bh)) { |
| 3692 | clear_buffer_journal_new(bh); |
| 3693 | clear_prepared_bits(bh); |
| 3694 | reiserfs_clean_and_file_buffer(bh); |
| 3695 | cleaned = remove_from_transaction(p_s_sb, blocknr, cleaned); |
| 3696 | } else { |
| 3697 | /* set the bit for this block in the journal bitmap for this transaction */ |
| 3698 | jb = journal->j_current_jl->j_list_bitmap; |
| 3699 | if (!jb) { |
| 3700 | reiserfs_panic(p_s_sb, |
| 3701 | "journal-1702: journal_mark_freed, journal_list_bitmap is NULL\n"); |
| 3702 | } |
| 3703 | set_bit_in_list_bitmap(p_s_sb, blocknr, jb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3704 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3705 | /* Note, the entire while loop is not allowed to schedule. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3706 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3707 | if (bh) { |
| 3708 | clear_prepared_bits(bh); |
| 3709 | reiserfs_clean_and_file_buffer(bh); |
| 3710 | } |
| 3711 | cleaned = remove_from_transaction(p_s_sb, blocknr, cleaned); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3712 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3713 | /* find all older transactions with this block, make sure they don't try to write it out */ |
| 3714 | cn = get_journal_hash_dev(p_s_sb, journal->j_list_hash_table, |
| 3715 | blocknr); |
| 3716 | while (cn) { |
| 3717 | if (p_s_sb == cn->sb && blocknr == cn->blocknr) { |
| 3718 | set_bit(BLOCK_FREED, &cn->state); |
| 3719 | if (cn->bh) { |
| 3720 | if (!cleaned) { |
| 3721 | /* remove_from_transaction will brelse the buffer if it was |
| 3722 | ** in the current trans |
| 3723 | */ |
| 3724 | clear_buffer_journal_dirty(cn-> |
| 3725 | bh); |
| 3726 | clear_buffer_dirty(cn->bh); |
| 3727 | clear_buffer_journal_test(cn-> |
| 3728 | bh); |
| 3729 | cleaned = 1; |
| 3730 | put_bh(cn->bh); |
| 3731 | if (atomic_read |
| 3732 | (&(cn->bh->b_count)) < 0) { |
| 3733 | reiserfs_warning(p_s_sb, |
| 3734 | "journal-2138: cn->bh->b_count < 0"); |
| 3735 | } |
| 3736 | } |
| 3737 | if (cn->jlist) { /* since we are clearing the bh, we MUST dec nonzerolen */ |
| 3738 | atomic_dec(& |
| 3739 | (cn->jlist-> |
| 3740 | j_nonzerolen)); |
| 3741 | } |
| 3742 | cn->bh = NULL; |
| 3743 | } |
| 3744 | } |
| 3745 | cn = cn->hnext; |
| 3746 | } |
| 3747 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3748 | |
Chris Mason | 398c95b | 2007-10-16 23:29:44 -0700 | [diff] [blame] | 3749 | if (bh) |
| 3750 | release_buffer_page(bh); /* get_hash grabs the buffer */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3751 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3752 | } |
| 3753 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3754 | void reiserfs_update_inode_transaction(struct inode *inode) |
| 3755 | { |
| 3756 | struct reiserfs_journal *journal = SB_JOURNAL(inode->i_sb); |
| 3757 | REISERFS_I(inode)->i_jl = journal->j_current_jl; |
| 3758 | REISERFS_I(inode)->i_trans_id = journal->j_trans_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3759 | } |
| 3760 | |
| 3761 | /* |
| 3762 | * returns -1 on error, 0 if no commits/barriers were done and 1 |
| 3763 | * if a transaction was actually committed and the barrier was done |
| 3764 | */ |
| 3765 | static int __commit_trans_jl(struct inode *inode, unsigned long id, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3766 | struct reiserfs_journal_list *jl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3767 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3768 | struct reiserfs_transaction_handle th; |
| 3769 | struct super_block *sb = inode->i_sb; |
| 3770 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
| 3771 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3772 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3773 | /* is it from the current transaction, or from an unknown transaction? */ |
| 3774 | if (id == journal->j_trans_id) { |
| 3775 | jl = journal->j_current_jl; |
| 3776 | /* try to let other writers come in and grow this transaction */ |
| 3777 | let_transaction_grow(sb, id); |
| 3778 | if (journal->j_trans_id != id) { |
| 3779 | goto flush_commit_only; |
| 3780 | } |
| 3781 | |
| 3782 | ret = journal_begin(&th, sb, 1); |
| 3783 | if (ret) |
| 3784 | return ret; |
| 3785 | |
| 3786 | /* someone might have ended this transaction while we joined */ |
| 3787 | if (journal->j_trans_id != id) { |
| 3788 | reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), |
| 3789 | 1); |
| 3790 | journal_mark_dirty(&th, sb, SB_BUFFER_WITH_SB(sb)); |
| 3791 | ret = journal_end(&th, sb, 1); |
| 3792 | goto flush_commit_only; |
| 3793 | } |
| 3794 | |
| 3795 | ret = journal_end_sync(&th, sb, 1); |
| 3796 | if (!ret) |
| 3797 | ret = 1; |
| 3798 | |
| 3799 | } else { |
| 3800 | /* this gets tricky, we have to make sure the journal list in |
| 3801 | * the inode still exists. We know the list is still around |
| 3802 | * if we've got a larger transaction id than the oldest list |
| 3803 | */ |
| 3804 | flush_commit_only: |
| 3805 | if (journal_list_still_alive(inode->i_sb, id)) { |
| 3806 | /* |
| 3807 | * we only set ret to 1 when we know for sure |
| 3808 | * the barrier hasn't been started yet on the commit |
| 3809 | * block. |
| 3810 | */ |
| 3811 | if (atomic_read(&jl->j_commit_left) > 1) |
| 3812 | ret = 1; |
| 3813 | flush_commit_list(sb, jl, 1); |
| 3814 | if (journal->j_errno) |
| 3815 | ret = journal->j_errno; |
| 3816 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3817 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3818 | /* otherwise the list is gone, and long since committed */ |
| 3819 | return ret; |
| 3820 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3821 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3822 | int reiserfs_commit_for_inode(struct inode *inode) |
| 3823 | { |
| 3824 | unsigned long id = REISERFS_I(inode)->i_trans_id; |
| 3825 | struct reiserfs_journal_list *jl = REISERFS_I(inode)->i_jl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3826 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3827 | /* for the whole inode, assume unset id means it was |
| 3828 | * changed in the current transaction. More conservative |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3829 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3830 | if (!id || !jl) { |
| 3831 | reiserfs_update_inode_transaction(inode); |
| 3832 | id = REISERFS_I(inode)->i_trans_id; |
| 3833 | /* jl will be updated in __commit_trans_jl */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3834 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3835 | |
| 3836 | return __commit_trans_jl(inode, id, jl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3837 | } |
| 3838 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3839 | void reiserfs_restore_prepared_buffer(struct super_block *p_s_sb, |
| 3840 | struct buffer_head *bh) |
| 3841 | { |
| 3842 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
| 3843 | PROC_INFO_INC(p_s_sb, journal.restore_prepared); |
| 3844 | if (!bh) { |
| 3845 | return; |
| 3846 | } |
| 3847 | if (test_clear_buffer_journal_restore_dirty(bh) && |
| 3848 | buffer_journal_dirty(bh)) { |
| 3849 | struct reiserfs_journal_cnode *cn; |
| 3850 | cn = get_journal_hash_dev(p_s_sb, |
| 3851 | journal->j_list_hash_table, |
| 3852 | bh->b_blocknr); |
| 3853 | if (cn && can_dirty(cn)) { |
| 3854 | set_buffer_journal_test(bh); |
| 3855 | mark_buffer_dirty(bh); |
| 3856 | } |
| 3857 | } |
| 3858 | clear_buffer_journal_prepared(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3859 | } |
| 3860 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3861 | extern struct tree_balance *cur_tb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3862 | /* |
| 3863 | ** before we can change a metadata block, we have to make sure it won't |
| 3864 | ** be written to disk while we are altering it. So, we must: |
| 3865 | ** clean it |
| 3866 | ** wait on it. |
| 3867 | ** |
| 3868 | */ |
| 3869 | int reiserfs_prepare_for_journal(struct super_block *p_s_sb, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3870 | struct buffer_head *bh, int wait) |
| 3871 | { |
| 3872 | PROC_INFO_INC(p_s_sb, journal.prepare); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3873 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3874 | if (test_set_buffer_locked(bh)) { |
| 3875 | if (!wait) |
| 3876 | return 0; |
| 3877 | lock_buffer(bh); |
| 3878 | } |
| 3879 | set_buffer_journal_prepared(bh); |
| 3880 | if (test_clear_buffer_dirty(bh) && buffer_journal_dirty(bh)) { |
| 3881 | clear_buffer_journal_test(bh); |
| 3882 | set_buffer_journal_restore_dirty(bh); |
| 3883 | } |
| 3884 | unlock_buffer(bh); |
| 3885 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3886 | } |
| 3887 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3888 | static void flush_old_journal_lists(struct super_block *s) |
| 3889 | { |
| 3890 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
| 3891 | struct reiserfs_journal_list *jl; |
| 3892 | struct list_head *entry; |
| 3893 | time_t now = get_seconds(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3894 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3895 | while (!list_empty(&journal->j_journal_list)) { |
| 3896 | entry = journal->j_journal_list.next; |
| 3897 | jl = JOURNAL_LIST_ENTRY(entry); |
| 3898 | /* this check should always be run, to send old lists to disk */ |
Chris Mason | a317202 | 2006-09-29 01:59:56 -0700 | [diff] [blame] | 3899 | if (jl->j_timestamp < (now - (JOURNAL_MAX_TRANS_AGE * 4)) && |
| 3900 | atomic_read(&jl->j_commit_left) == 0 && |
| 3901 | test_transaction(s, jl)) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3902 | flush_used_journal_lists(s, jl); |
| 3903 | } else { |
| 3904 | break; |
| 3905 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3906 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3907 | } |
| 3908 | |
| 3909 | /* |
| 3910 | ** long and ugly. If flush, will not return until all commit |
| 3911 | ** blocks and all real buffers in the trans are on disk. |
| 3912 | ** If no_async, won't return until all commit blocks are on disk. |
| 3913 | ** |
| 3914 | ** keep reading, there are comments as you go along |
| 3915 | ** |
| 3916 | ** If the journal is aborted, we just clean up. Things like flushing |
| 3917 | ** journal lists, etc just won't happen. |
| 3918 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3919 | static int do_journal_end(struct reiserfs_transaction_handle *th, |
| 3920 | struct super_block *p_s_sb, unsigned long nblocks, |
| 3921 | int flags) |
| 3922 | { |
| 3923 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); |
| 3924 | struct reiserfs_journal_cnode *cn, *next, *jl_cn; |
| 3925 | struct reiserfs_journal_cnode *last_cn = NULL; |
| 3926 | struct reiserfs_journal_desc *desc; |
| 3927 | struct reiserfs_journal_commit *commit; |
| 3928 | struct buffer_head *c_bh; /* commit bh */ |
| 3929 | struct buffer_head *d_bh; /* desc bh */ |
| 3930 | int cur_write_start = 0; /* start index of current log write */ |
| 3931 | int old_start; |
| 3932 | int i; |
Alexander Zarochentsev | a44c94a | 2006-03-25 03:06:59 -0800 | [diff] [blame] | 3933 | int flush; |
| 3934 | int wait_on_commit; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3935 | struct reiserfs_journal_list *jl, *temp_jl; |
| 3936 | struct list_head *entry, *safe; |
| 3937 | unsigned long jindex; |
| 3938 | unsigned long commit_trans_id; |
| 3939 | int trans_half; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3940 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3941 | BUG_ON(th->t_refcount > 1); |
| 3942 | BUG_ON(!th->t_trans_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3943 | |
Alexander Zarochentsev | a44c94a | 2006-03-25 03:06:59 -0800 | [diff] [blame] | 3944 | /* protect flush_older_commits from doing mistakes if the |
| 3945 | transaction ID counter gets overflowed. */ |
| 3946 | if (th->t_trans_id == ~0UL) |
| 3947 | flags |= FLUSH_ALL | COMMIT_NOW | WAIT; |
| 3948 | flush = flags & FLUSH_ALL; |
| 3949 | wait_on_commit = flags & WAIT; |
| 3950 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3951 | put_fs_excl(); |
| 3952 | current->journal_info = th->t_handle_save; |
| 3953 | reiserfs_check_lock_depth(p_s_sb, "journal end"); |
| 3954 | if (journal->j_len == 0) { |
| 3955 | reiserfs_prepare_for_journal(p_s_sb, SB_BUFFER_WITH_SB(p_s_sb), |
| 3956 | 1); |
| 3957 | journal_mark_dirty(th, p_s_sb, SB_BUFFER_WITH_SB(p_s_sb)); |
| 3958 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3959 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3960 | lock_journal(p_s_sb); |
| 3961 | if (journal->j_next_full_flush) { |
| 3962 | flags |= FLUSH_ALL; |
| 3963 | flush = 1; |
| 3964 | } |
| 3965 | if (journal->j_next_async_flush) { |
| 3966 | flags |= COMMIT_NOW | WAIT; |
| 3967 | wait_on_commit = 1; |
| 3968 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3969 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3970 | /* check_journal_end locks the journal, and unlocks if it does not return 1 |
| 3971 | ** it tells us if we should continue with the journal_end, or just return |
| 3972 | */ |
| 3973 | if (!check_journal_end(th, p_s_sb, nblocks, flags)) { |
| 3974 | p_s_sb->s_dirt = 1; |
| 3975 | wake_queued_writers(p_s_sb); |
| 3976 | reiserfs_async_progress_wait(p_s_sb); |
| 3977 | goto out; |
| 3978 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3979 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3980 | /* check_journal_end might set these, check again */ |
| 3981 | if (journal->j_next_full_flush) { |
| 3982 | flush = 1; |
| 3983 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3984 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3985 | /* |
| 3986 | ** j must wait means we have to flush the log blocks, and the real blocks for |
| 3987 | ** this transaction |
| 3988 | */ |
| 3989 | if (journal->j_must_wait > 0) { |
| 3990 | flush = 1; |
| 3991 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3992 | #ifdef REISERFS_PREALLOCATE |
Jan Kara | ef43bc4 | 2006-01-11 12:17:40 -0800 | [diff] [blame] | 3993 | /* quota ops might need to nest, setup the journal_info pointer for them |
| 3994 | * and raise the refcount so that it is > 0. */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3995 | current->journal_info = th; |
Jan Kara | ef43bc4 | 2006-01-11 12:17:40 -0800 | [diff] [blame] | 3996 | th->t_refcount++; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3997 | reiserfs_discard_all_prealloc(th); /* it should not involve new blocks into |
| 3998 | * the transaction */ |
Jan Kara | ef43bc4 | 2006-01-11 12:17:40 -0800 | [diff] [blame] | 3999 | th->t_refcount--; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4000 | current->journal_info = th->t_handle_save; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4001 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4002 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4003 | /* setup description block */ |
| 4004 | d_bh = |
| 4005 | journal_getblk(p_s_sb, |
| 4006 | SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + |
| 4007 | journal->j_start); |
| 4008 | set_buffer_uptodate(d_bh); |
| 4009 | desc = (struct reiserfs_journal_desc *)(d_bh)->b_data; |
| 4010 | memset(d_bh->b_data, 0, d_bh->b_size); |
| 4011 | memcpy(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8); |
| 4012 | set_desc_trans_id(desc, journal->j_trans_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4013 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4014 | /* setup commit block. Don't write (keep it clean too) this one until after everyone else is written */ |
| 4015 | c_bh = journal_getblk(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + |
| 4016 | ((journal->j_start + journal->j_len + |
| 4017 | 1) % SB_ONDISK_JOURNAL_SIZE(p_s_sb))); |
| 4018 | commit = (struct reiserfs_journal_commit *)c_bh->b_data; |
| 4019 | memset(c_bh->b_data, 0, c_bh->b_size); |
| 4020 | set_commit_trans_id(commit, journal->j_trans_id); |
| 4021 | set_buffer_uptodate(c_bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4022 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4023 | /* init this journal list */ |
| 4024 | jl = journal->j_current_jl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4025 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4026 | /* we lock the commit before doing anything because |
| 4027 | * we want to make sure nobody tries to run flush_commit_list until |
| 4028 | * the new transaction is fully setup, and we've already flushed the |
| 4029 | * ordered bh list |
| 4030 | */ |
Jeff Mahoney | 90415de | 2008-07-25 01:46:40 -0700 | [diff] [blame] | 4031 | mutex_lock(&jl->j_commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4032 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4033 | /* save the transaction id in case we need to commit it later */ |
| 4034 | commit_trans_id = jl->j_trans_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4035 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4036 | atomic_set(&jl->j_older_commits_done, 0); |
| 4037 | jl->j_trans_id = journal->j_trans_id; |
| 4038 | jl->j_timestamp = journal->j_trans_start_time; |
| 4039 | jl->j_commit_bh = c_bh; |
| 4040 | jl->j_start = journal->j_start; |
| 4041 | jl->j_len = journal->j_len; |
| 4042 | atomic_set(&jl->j_nonzerolen, journal->j_len); |
| 4043 | atomic_set(&jl->j_commit_left, journal->j_len + 2); |
| 4044 | jl->j_realblock = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4045 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4046 | /* The ENTIRE FOR LOOP MUST not cause schedule to occur. |
| 4047 | ** for each real block, add it to the journal list hash, |
| 4048 | ** copy into real block index array in the commit or desc block |
| 4049 | */ |
| 4050 | trans_half = journal_trans_half(p_s_sb->s_blocksize); |
| 4051 | for (i = 0, cn = journal->j_first; cn; cn = cn->next, i++) { |
| 4052 | if (buffer_journaled(cn->bh)) { |
| 4053 | jl_cn = get_cnode(p_s_sb); |
| 4054 | if (!jl_cn) { |
| 4055 | reiserfs_panic(p_s_sb, |
| 4056 | "journal-1676, get_cnode returned NULL\n"); |
| 4057 | } |
| 4058 | if (i == 0) { |
| 4059 | jl->j_realblock = jl_cn; |
| 4060 | } |
| 4061 | jl_cn->prev = last_cn; |
| 4062 | jl_cn->next = NULL; |
| 4063 | if (last_cn) { |
| 4064 | last_cn->next = jl_cn; |
| 4065 | } |
| 4066 | last_cn = jl_cn; |
| 4067 | /* make sure the block we are trying to log is not a block |
| 4068 | of journal or reserved area */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4069 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4070 | if (is_block_in_log_or_reserved_area |
| 4071 | (p_s_sb, cn->bh->b_blocknr)) { |
| 4072 | reiserfs_panic(p_s_sb, |
| 4073 | "journal-2332: Trying to log block %lu, which is a log block\n", |
| 4074 | cn->bh->b_blocknr); |
| 4075 | } |
| 4076 | jl_cn->blocknr = cn->bh->b_blocknr; |
| 4077 | jl_cn->state = 0; |
| 4078 | jl_cn->sb = p_s_sb; |
| 4079 | jl_cn->bh = cn->bh; |
| 4080 | jl_cn->jlist = jl; |
| 4081 | insert_journal_hash(journal->j_list_hash_table, jl_cn); |
| 4082 | if (i < trans_half) { |
| 4083 | desc->j_realblock[i] = |
| 4084 | cpu_to_le32(cn->bh->b_blocknr); |
| 4085 | } else { |
| 4086 | commit->j_realblock[i - trans_half] = |
| 4087 | cpu_to_le32(cn->bh->b_blocknr); |
| 4088 | } |
| 4089 | } else { |
| 4090 | i--; |
| 4091 | } |
| 4092 | } |
| 4093 | set_desc_trans_len(desc, journal->j_len); |
| 4094 | set_desc_mount_id(desc, journal->j_mount_id); |
| 4095 | set_desc_trans_id(desc, journal->j_trans_id); |
| 4096 | set_commit_trans_len(commit, journal->j_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4097 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4098 | /* special check in case all buffers in the journal were marked for not logging */ |
Eric Sesterhenn | 14a6144 | 2006-10-03 23:36:38 +0200 | [diff] [blame] | 4099 | BUG_ON(journal->j_len == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4100 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4101 | /* we're about to dirty all the log blocks, mark the description block |
| 4102 | * dirty now too. Don't mark the commit block dirty until all the |
| 4103 | * others are on disk |
| 4104 | */ |
| 4105 | mark_buffer_dirty(d_bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4106 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4107 | /* first data block is j_start + 1, so add one to cur_write_start wherever you use it */ |
| 4108 | cur_write_start = journal->j_start; |
| 4109 | cn = journal->j_first; |
| 4110 | jindex = 1; /* start at one so we don't get the desc again */ |
| 4111 | while (cn) { |
| 4112 | clear_buffer_journal_new(cn->bh); |
| 4113 | /* copy all the real blocks into log area. dirty log blocks */ |
| 4114 | if (buffer_journaled(cn->bh)) { |
| 4115 | struct buffer_head *tmp_bh; |
| 4116 | char *addr; |
| 4117 | struct page *page; |
| 4118 | tmp_bh = |
| 4119 | journal_getblk(p_s_sb, |
| 4120 | SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + |
| 4121 | ((cur_write_start + |
| 4122 | jindex) % |
| 4123 | SB_ONDISK_JOURNAL_SIZE(p_s_sb))); |
| 4124 | set_buffer_uptodate(tmp_bh); |
| 4125 | page = cn->bh->b_page; |
| 4126 | addr = kmap(page); |
| 4127 | memcpy(tmp_bh->b_data, |
| 4128 | addr + offset_in_page(cn->bh->b_data), |
| 4129 | cn->bh->b_size); |
| 4130 | kunmap(page); |
| 4131 | mark_buffer_dirty(tmp_bh); |
| 4132 | jindex++; |
| 4133 | set_buffer_journal_dirty(cn->bh); |
| 4134 | clear_buffer_journaled(cn->bh); |
| 4135 | } else { |
| 4136 | /* JDirty cleared sometime during transaction. don't log this one */ |
| 4137 | reiserfs_warning(p_s_sb, |
| 4138 | "journal-2048: do_journal_end: BAD, buffer in journal hash, but not JDirty!"); |
| 4139 | brelse(cn->bh); |
| 4140 | } |
| 4141 | next = cn->next; |
| 4142 | free_cnode(p_s_sb, cn); |
| 4143 | cn = next; |
| 4144 | cond_resched(); |
| 4145 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4146 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4147 | /* we are done with both the c_bh and d_bh, but |
| 4148 | ** c_bh must be written after all other commit blocks, |
| 4149 | ** so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1. |
| 4150 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4151 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4152 | journal->j_current_jl = alloc_journal_list(p_s_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4153 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4154 | /* now it is safe to insert this transaction on the main list */ |
| 4155 | list_add_tail(&jl->j_list, &journal->j_journal_list); |
| 4156 | list_add_tail(&jl->j_working_list, &journal->j_working_list); |
| 4157 | journal->j_num_work_lists++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4158 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4159 | /* reset journal values for the next transaction */ |
| 4160 | old_start = journal->j_start; |
| 4161 | journal->j_start = |
| 4162 | (journal->j_start + journal->j_len + |
| 4163 | 2) % SB_ONDISK_JOURNAL_SIZE(p_s_sb); |
| 4164 | atomic_set(&(journal->j_wcount), 0); |
| 4165 | journal->j_bcount = 0; |
| 4166 | journal->j_last = NULL; |
| 4167 | journal->j_first = NULL; |
| 4168 | journal->j_len = 0; |
| 4169 | journal->j_trans_start_time = 0; |
Alexander Zarochentsev | a44c94a | 2006-03-25 03:06:59 -0800 | [diff] [blame] | 4170 | /* check for trans_id overflow */ |
| 4171 | if (++journal->j_trans_id == 0) |
| 4172 | journal->j_trans_id = 10; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4173 | journal->j_current_jl->j_trans_id = journal->j_trans_id; |
| 4174 | journal->j_must_wait = 0; |
| 4175 | journal->j_len_alloc = 0; |
| 4176 | journal->j_next_full_flush = 0; |
| 4177 | journal->j_next_async_flush = 0; |
| 4178 | init_journal_hash(p_s_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4179 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4180 | // make sure reiserfs_add_jh sees the new current_jl before we |
| 4181 | // write out the tails |
| 4182 | smp_mb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4183 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4184 | /* tail conversion targets have to hit the disk before we end the |
| 4185 | * transaction. Otherwise a later transaction might repack the tail |
| 4186 | * before this transaction commits, leaving the data block unflushed and |
| 4187 | * clean, if we crash before the later transaction commits, the data block |
| 4188 | * is lost. |
| 4189 | */ |
| 4190 | if (!list_empty(&jl->j_tail_bh_list)) { |
| 4191 | unlock_kernel(); |
| 4192 | write_ordered_buffers(&journal->j_dirty_buffers_lock, |
| 4193 | journal, jl, &jl->j_tail_bh_list); |
| 4194 | lock_kernel(); |
| 4195 | } |
Eric Sesterhenn | 14a6144 | 2006-10-03 23:36:38 +0200 | [diff] [blame] | 4196 | BUG_ON(!list_empty(&jl->j_tail_bh_list)); |
Jeff Mahoney | 90415de | 2008-07-25 01:46:40 -0700 | [diff] [blame] | 4197 | mutex_unlock(&jl->j_commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4198 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4199 | /* honor the flush wishes from the caller, simple commits can |
| 4200 | ** be done outside the journal lock, they are done below |
| 4201 | ** |
| 4202 | ** if we don't flush the commit list right now, we put it into |
| 4203 | ** the work queue so the people waiting on the async progress work |
| 4204 | ** queue don't wait for this proc to flush journal lists and such. |
| 4205 | */ |
| 4206 | if (flush) { |
| 4207 | flush_commit_list(p_s_sb, jl, 1); |
| 4208 | flush_journal_list(p_s_sb, jl, 1); |
| 4209 | } else if (!(jl->j_state & LIST_COMMIT_PENDING)) |
| 4210 | queue_delayed_work(commit_wq, &journal->j_work, HZ / 10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4211 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4212 | /* if the next transaction has any chance of wrapping, flush |
| 4213 | ** transactions that might get overwritten. If any journal lists are very |
| 4214 | ** old flush them as well. |
| 4215 | */ |
| 4216 | first_jl: |
| 4217 | list_for_each_safe(entry, safe, &journal->j_journal_list) { |
| 4218 | temp_jl = JOURNAL_LIST_ENTRY(entry); |
| 4219 | if (journal->j_start <= temp_jl->j_start) { |
| 4220 | if ((journal->j_start + journal->j_trans_max + 1) >= |
| 4221 | temp_jl->j_start) { |
| 4222 | flush_used_journal_lists(p_s_sb, temp_jl); |
| 4223 | goto first_jl; |
| 4224 | } else if ((journal->j_start + |
| 4225 | journal->j_trans_max + 1) < |
| 4226 | SB_ONDISK_JOURNAL_SIZE(p_s_sb)) { |
| 4227 | /* if we don't cross into the next transaction and we don't |
| 4228 | * wrap, there is no way we can overlap any later transactions |
| 4229 | * break now |
| 4230 | */ |
| 4231 | break; |
| 4232 | } |
| 4233 | } else if ((journal->j_start + |
| 4234 | journal->j_trans_max + 1) > |
| 4235 | SB_ONDISK_JOURNAL_SIZE(p_s_sb)) { |
| 4236 | if (((journal->j_start + journal->j_trans_max + 1) % |
| 4237 | SB_ONDISK_JOURNAL_SIZE(p_s_sb)) >= |
| 4238 | temp_jl->j_start) { |
| 4239 | flush_used_journal_lists(p_s_sb, temp_jl); |
| 4240 | goto first_jl; |
| 4241 | } else { |
| 4242 | /* we don't overlap anything from out start to the end of the |
| 4243 | * log, and our wrapped portion doesn't overlap anything at |
| 4244 | * the start of the log. We can break |
| 4245 | */ |
| 4246 | break; |
| 4247 | } |
| 4248 | } |
| 4249 | } |
| 4250 | flush_old_journal_lists(p_s_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4251 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4252 | journal->j_current_jl->j_list_bitmap = |
| 4253 | get_list_bitmap(p_s_sb, journal->j_current_jl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4254 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4255 | if (!(journal->j_current_jl->j_list_bitmap)) { |
| 4256 | reiserfs_panic(p_s_sb, |
| 4257 | "journal-1996: do_journal_end, could not get a list bitmap\n"); |
| 4258 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4259 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4260 | atomic_set(&(journal->j_jlock), 0); |
| 4261 | unlock_journal(p_s_sb); |
| 4262 | /* wake up any body waiting to join. */ |
| 4263 | clear_bit(J_WRITERS_QUEUED, &journal->j_state); |
| 4264 | wake_up(&(journal->j_join_wait)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4265 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4266 | if (!flush && wait_on_commit && |
| 4267 | journal_list_still_alive(p_s_sb, commit_trans_id)) { |
| 4268 | flush_commit_list(p_s_sb, jl, 1); |
| 4269 | } |
| 4270 | out: |
| 4271 | reiserfs_check_lock_depth(p_s_sb, "journal end2"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4272 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4273 | memset(th, 0, sizeof(*th)); |
| 4274 | /* Re-set th->t_super, so we can properly keep track of how many |
| 4275 | * persistent transactions there are. We need to do this so if this |
| 4276 | * call is part of a failed restart_transaction, we can free it later */ |
| 4277 | th->t_super = p_s_sb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4278 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4279 | return journal->j_errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4280 | } |
| 4281 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4282 | static void __reiserfs_journal_abort_hard(struct super_block *sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4283 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4284 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
| 4285 | if (test_bit(J_ABORTED, &journal->j_state)) |
| 4286 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4287 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4288 | printk(KERN_CRIT "REISERFS: Aborting journal for filesystem on %s\n", |
| 4289 | reiserfs_bdevname(sb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4290 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4291 | sb->s_flags |= MS_RDONLY; |
| 4292 | set_bit(J_ABORTED, &journal->j_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4293 | |
| 4294 | #ifdef CONFIG_REISERFS_CHECK |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4295 | dump_stack(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4296 | #endif |
| 4297 | } |
| 4298 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4299 | static void __reiserfs_journal_abort_soft(struct super_block *sb, int errno) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4300 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4301 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
| 4302 | if (test_bit(J_ABORTED, &journal->j_state)) |
| 4303 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4304 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4305 | if (!journal->j_errno) |
| 4306 | journal->j_errno = errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4307 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4308 | __reiserfs_journal_abort_hard(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4309 | } |
| 4310 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 4311 | void reiserfs_journal_abort(struct super_block *sb, int errno) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4312 | { |
Harvey Harrison | e13601b | 2008-04-28 02:16:21 -0700 | [diff] [blame] | 4313 | __reiserfs_journal_abort_soft(sb, errno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4314 | } |