11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds ** Write ahead logging implementation copyright Chris Mason 2000 31da177e4SLinus Torvalds ** 425985edcSLucas De Marchi ** The background commits make this code very interrelated, and 51da177e4SLinus Torvalds ** overly complex. I need to rethink things a bit....The major players: 61da177e4SLinus Torvalds ** 71da177e4SLinus Torvalds ** journal_begin -- call with the number of blocks you expect to log. 81da177e4SLinus Torvalds ** If the current transaction is too 91da177e4SLinus Torvalds ** old, it will block until the current transaction is 101da177e4SLinus Torvalds ** finished, and then start a new one. 111da177e4SLinus Torvalds ** Usually, your transaction will get joined in with 121da177e4SLinus Torvalds ** previous ones for speed. 131da177e4SLinus Torvalds ** 141da177e4SLinus Torvalds ** journal_join -- same as journal_begin, but won't block on the current 151da177e4SLinus Torvalds ** transaction regardless of age. Don't ever call 161da177e4SLinus Torvalds ** this. Ever. There are only two places it should be 171da177e4SLinus Torvalds ** called from, and they are both inside this file. 181da177e4SLinus Torvalds ** 191da177e4SLinus Torvalds ** journal_mark_dirty -- adds blocks into this transaction. clears any flags 201da177e4SLinus Torvalds ** that might make them get sent to disk 211da177e4SLinus Torvalds ** and then marks them BH_JDirty. Puts the buffer head 221da177e4SLinus Torvalds ** into the current transaction hash. 231da177e4SLinus Torvalds ** 241da177e4SLinus Torvalds ** journal_end -- if the current transaction is batchable, it does nothing 251da177e4SLinus Torvalds ** otherwise, it could do an async/synchronous commit, or 261da177e4SLinus Torvalds ** a full flush of all log and real blocks in the 271da177e4SLinus Torvalds ** transaction. 281da177e4SLinus Torvalds ** 291da177e4SLinus Torvalds ** flush_old_commits -- if the current transaction is too old, it is ended and 301da177e4SLinus Torvalds ** commit blocks are sent to disk. Forces commit blocks 311da177e4SLinus Torvalds ** to disk for all backgrounded commits that have been 321da177e4SLinus Torvalds ** around too long. 331da177e4SLinus Torvalds ** -- Note, if you call this as an immediate flush from 341da177e4SLinus Torvalds ** from within kupdate, it will ignore the immediate flag 351da177e4SLinus Torvalds */ 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds #include <linux/time.h> 386188e10dSMatthew Wilcox #include <linux/semaphore.h> 391da177e4SLinus Torvalds #include <linux/vmalloc.h> 401da177e4SLinus Torvalds #include <linux/reiserfs_fs.h> 411da177e4SLinus Torvalds #include <linux/kernel.h> 421da177e4SLinus Torvalds #include <linux/errno.h> 431da177e4SLinus Torvalds #include <linux/fcntl.h> 441da177e4SLinus Torvalds #include <linux/stat.h> 451da177e4SLinus Torvalds #include <linux/string.h> 461da177e4SLinus Torvalds #include <linux/buffer_head.h> 471da177e4SLinus Torvalds #include <linux/workqueue.h> 481da177e4SLinus Torvalds #include <linux/writeback.h> 491da177e4SLinus Torvalds #include <linux/blkdev.h> 503fcfab16SAndrew Morton #include <linux/backing-dev.h> 5190415deaSJeff Mahoney #include <linux/uaccess.h> 525a0e3ad6STejun Heo #include <linux/slab.h> 5390415deaSJeff Mahoney 5490415deaSJeff Mahoney #include <asm/system.h> 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds /* gets a struct reiserfs_journal_list * from a list head */ 571da177e4SLinus Torvalds #define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \ 581da177e4SLinus Torvalds j_list)) 591da177e4SLinus Torvalds #define JOURNAL_WORK_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \ 601da177e4SLinus Torvalds j_working_list)) 611da177e4SLinus Torvalds 621da177e4SLinus Torvalds /* the number of mounted filesystems. This is used to decide when to 631da177e4SLinus Torvalds ** start and kill the commit workqueue 641da177e4SLinus Torvalds */ 651da177e4SLinus Torvalds static int reiserfs_mounted_fs_count; 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds static struct workqueue_struct *commit_wq; 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds #define JOURNAL_TRANS_HALF 1018 /* must be correct to keep the desc and commit 701da177e4SLinus Torvalds structs at 4k */ 711da177e4SLinus Torvalds #define BUFNR 64 /*read ahead */ 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds /* cnode stat bits. Move these into reiserfs_fs.h */ 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds #define BLOCK_FREED 2 /* this block was freed, and can't be written. */ 761da177e4SLinus Torvalds #define BLOCK_FREED_HOLDER 3 /* this block was freed during this transaction, and can't be written */ 771da177e4SLinus Torvalds 781da177e4SLinus Torvalds #define BLOCK_NEEDS_FLUSH 4 /* used in flush_journal_list */ 791da177e4SLinus Torvalds #define BLOCK_DIRTIED 5 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds /* journal list state bits */ 821da177e4SLinus Torvalds #define LIST_TOUCHED 1 831da177e4SLinus Torvalds #define LIST_DIRTY 2 841da177e4SLinus Torvalds #define LIST_COMMIT_PENDING 4 /* someone will commit this list */ 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds /* flags for do_journal_end */ 871da177e4SLinus Torvalds #define FLUSH_ALL 1 /* flush commit and real blocks */ 881da177e4SLinus Torvalds #define COMMIT_NOW 2 /* end and commit this transaction */ 891da177e4SLinus Torvalds #define WAIT 4 /* wait for the log blocks to hit the disk */ 901da177e4SLinus Torvalds 91bd4c625cSLinus Torvalds static int do_journal_end(struct reiserfs_transaction_handle *, 92bd4c625cSLinus Torvalds struct super_block *, unsigned long nblocks, 93bd4c625cSLinus Torvalds int flags); 94bd4c625cSLinus Torvalds static int flush_journal_list(struct super_block *s, 95bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl, int flushall); 96bd4c625cSLinus Torvalds static int flush_commit_list(struct super_block *s, 97bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl, int flushall); 981da177e4SLinus Torvalds static int can_dirty(struct reiserfs_journal_cnode *cn); 99bd4c625cSLinus Torvalds static int journal_join(struct reiserfs_transaction_handle *th, 100a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks); 1011da177e4SLinus Torvalds static int release_journal_dev(struct super_block *super, 1021da177e4SLinus Torvalds struct reiserfs_journal *journal); 1031da177e4SLinus Torvalds static int dirty_one_transaction(struct super_block *s, 1041da177e4SLinus Torvalds struct reiserfs_journal_list *jl); 105c4028958SDavid Howells static void flush_async_commits(struct work_struct *work); 1061da177e4SLinus Torvalds static void queue_log_writer(struct super_block *s); 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds /* values for join in do_journal_begin_r */ 1091da177e4SLinus Torvalds enum { 1101da177e4SLinus Torvalds JBEGIN_REG = 0, /* regular journal begin */ 1111da177e4SLinus Torvalds JBEGIN_JOIN = 1, /* join the running transaction if at all possible */ 1121da177e4SLinus Torvalds JBEGIN_ABORT = 2, /* called from cleanup code, ignores aborted flag */ 1131da177e4SLinus Torvalds }; 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds static int do_journal_begin_r(struct reiserfs_transaction_handle *th, 116a9dd3643SJeff Mahoney struct super_block *sb, 1171da177e4SLinus Torvalds unsigned long nblocks, int join); 1181da177e4SLinus Torvalds 119a9dd3643SJeff Mahoney static void init_journal_hash(struct super_block *sb) 120bd4c625cSLinus Torvalds { 121a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 122bd4c625cSLinus Torvalds memset(journal->j_hash_table, 0, 123bd4c625cSLinus Torvalds JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)); 1241da177e4SLinus Torvalds } 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds /* 1271da177e4SLinus Torvalds ** clears BH_Dirty and sticks the buffer on the clean list. Called because I can't allow refile_buffer to 1281da177e4SLinus Torvalds ** make schedule happen after I've freed a block. Look at remove_from_transaction and journal_mark_freed for 1291da177e4SLinus Torvalds ** more details. 1301da177e4SLinus Torvalds */ 131bd4c625cSLinus Torvalds static int reiserfs_clean_and_file_buffer(struct buffer_head *bh) 132bd4c625cSLinus Torvalds { 1331da177e4SLinus Torvalds if (bh) { 1341da177e4SLinus Torvalds clear_buffer_dirty(bh); 1351da177e4SLinus Torvalds clear_buffer_journal_test(bh); 1361da177e4SLinus Torvalds } 1371da177e4SLinus Torvalds return 0; 1381da177e4SLinus Torvalds } 1391da177e4SLinus Torvalds 140bd4c625cSLinus Torvalds static struct reiserfs_bitmap_node *allocate_bitmap_node(struct super_block 141a9dd3643SJeff Mahoney *sb) 142bd4c625cSLinus Torvalds { 1431da177e4SLinus Torvalds struct reiserfs_bitmap_node *bn; 1441da177e4SLinus Torvalds static int id; 1451da177e4SLinus Torvalds 146d739b42bSPekka Enberg bn = kmalloc(sizeof(struct reiserfs_bitmap_node), GFP_NOFS); 1471da177e4SLinus Torvalds if (!bn) { 1481da177e4SLinus Torvalds return NULL; 1491da177e4SLinus Torvalds } 150a9dd3643SJeff Mahoney bn->data = kzalloc(sb->s_blocksize, GFP_NOFS); 1511da177e4SLinus Torvalds if (!bn->data) { 152d739b42bSPekka Enberg kfree(bn); 1531da177e4SLinus Torvalds return NULL; 1541da177e4SLinus Torvalds } 1551da177e4SLinus Torvalds bn->id = id++; 1561da177e4SLinus Torvalds INIT_LIST_HEAD(&bn->list); 1571da177e4SLinus Torvalds return bn; 1581da177e4SLinus Torvalds } 1591da177e4SLinus Torvalds 160a9dd3643SJeff Mahoney static struct reiserfs_bitmap_node *get_bitmap_node(struct super_block *sb) 161bd4c625cSLinus Torvalds { 162a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 1631da177e4SLinus Torvalds struct reiserfs_bitmap_node *bn = NULL; 1641da177e4SLinus Torvalds struct list_head *entry = journal->j_bitmap_nodes.next; 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds journal->j_used_bitmap_nodes++; 1671da177e4SLinus Torvalds repeat: 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds if (entry != &journal->j_bitmap_nodes) { 1701da177e4SLinus Torvalds bn = list_entry(entry, struct reiserfs_bitmap_node, list); 1711da177e4SLinus Torvalds list_del(entry); 172a9dd3643SJeff Mahoney memset(bn->data, 0, sb->s_blocksize); 1731da177e4SLinus Torvalds journal->j_free_bitmap_nodes--; 1741da177e4SLinus Torvalds return bn; 1751da177e4SLinus Torvalds } 176a9dd3643SJeff Mahoney bn = allocate_bitmap_node(sb); 1771da177e4SLinus Torvalds if (!bn) { 1781da177e4SLinus Torvalds yield(); 1791da177e4SLinus Torvalds goto repeat; 1801da177e4SLinus Torvalds } 1811da177e4SLinus Torvalds return bn; 1821da177e4SLinus Torvalds } 183a9dd3643SJeff Mahoney static inline void free_bitmap_node(struct super_block *sb, 184bd4c625cSLinus Torvalds struct reiserfs_bitmap_node *bn) 185bd4c625cSLinus Torvalds { 186a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 1871da177e4SLinus Torvalds journal->j_used_bitmap_nodes--; 1881da177e4SLinus Torvalds if (journal->j_free_bitmap_nodes > REISERFS_MAX_BITMAP_NODES) { 189d739b42bSPekka Enberg kfree(bn->data); 190d739b42bSPekka Enberg kfree(bn); 1911da177e4SLinus Torvalds } else { 1921da177e4SLinus Torvalds list_add(&bn->list, &journal->j_bitmap_nodes); 1931da177e4SLinus Torvalds journal->j_free_bitmap_nodes++; 1941da177e4SLinus Torvalds } 1951da177e4SLinus Torvalds } 1961da177e4SLinus Torvalds 197a9dd3643SJeff Mahoney static void allocate_bitmap_nodes(struct super_block *sb) 198bd4c625cSLinus Torvalds { 1991da177e4SLinus Torvalds int i; 200a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 2011da177e4SLinus Torvalds struct reiserfs_bitmap_node *bn = NULL; 2021da177e4SLinus Torvalds for (i = 0; i < REISERFS_MIN_BITMAP_NODES; i++) { 203a9dd3643SJeff Mahoney bn = allocate_bitmap_node(sb); 2041da177e4SLinus Torvalds if (bn) { 2051da177e4SLinus Torvalds list_add(&bn->list, &journal->j_bitmap_nodes); 2061da177e4SLinus Torvalds journal->j_free_bitmap_nodes++; 2071da177e4SLinus Torvalds } else { 2080222e657SJeff Mahoney break; /* this is ok, we'll try again when more are needed */ 2091da177e4SLinus Torvalds } 2101da177e4SLinus Torvalds } 2111da177e4SLinus Torvalds } 2121da177e4SLinus Torvalds 213a9dd3643SJeff Mahoney static int set_bit_in_list_bitmap(struct super_block *sb, 2143ee16670SJeff Mahoney b_blocknr_t block, 215bd4c625cSLinus Torvalds struct reiserfs_list_bitmap *jb) 216bd4c625cSLinus Torvalds { 217a9dd3643SJeff Mahoney unsigned int bmap_nr = block / (sb->s_blocksize << 3); 218a9dd3643SJeff Mahoney unsigned int bit_nr = block % (sb->s_blocksize << 3); 2191da177e4SLinus Torvalds 2201da177e4SLinus Torvalds if (!jb->bitmaps[bmap_nr]) { 221a9dd3643SJeff Mahoney jb->bitmaps[bmap_nr] = get_bitmap_node(sb); 2221da177e4SLinus Torvalds } 2231da177e4SLinus Torvalds set_bit(bit_nr, (unsigned long *)jb->bitmaps[bmap_nr]->data); 2241da177e4SLinus Torvalds return 0; 2251da177e4SLinus Torvalds } 2261da177e4SLinus Torvalds 227a9dd3643SJeff Mahoney static void cleanup_bitmap_list(struct super_block *sb, 228bd4c625cSLinus Torvalds struct reiserfs_list_bitmap *jb) 229bd4c625cSLinus Torvalds { 2301da177e4SLinus Torvalds int i; 2311da177e4SLinus Torvalds if (jb->bitmaps == NULL) 2321da177e4SLinus Torvalds return; 2331da177e4SLinus Torvalds 234a9dd3643SJeff Mahoney for (i = 0; i < reiserfs_bmap_count(sb); i++) { 2351da177e4SLinus Torvalds if (jb->bitmaps[i]) { 236a9dd3643SJeff Mahoney free_bitmap_node(sb, jb->bitmaps[i]); 2371da177e4SLinus Torvalds jb->bitmaps[i] = NULL; 2381da177e4SLinus Torvalds } 2391da177e4SLinus Torvalds } 2401da177e4SLinus Torvalds } 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds /* 2431da177e4SLinus Torvalds ** only call this on FS unmount. 2441da177e4SLinus Torvalds */ 245a9dd3643SJeff Mahoney static int free_list_bitmaps(struct super_block *sb, 246bd4c625cSLinus Torvalds struct reiserfs_list_bitmap *jb_array) 247bd4c625cSLinus Torvalds { 2481da177e4SLinus Torvalds int i; 2491da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb; 2501da177e4SLinus Torvalds for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { 2511da177e4SLinus Torvalds jb = jb_array + i; 2521da177e4SLinus Torvalds jb->journal_list = NULL; 253a9dd3643SJeff Mahoney cleanup_bitmap_list(sb, jb); 2541da177e4SLinus Torvalds vfree(jb->bitmaps); 2551da177e4SLinus Torvalds jb->bitmaps = NULL; 2561da177e4SLinus Torvalds } 2571da177e4SLinus Torvalds return 0; 2581da177e4SLinus Torvalds } 2591da177e4SLinus Torvalds 260a9dd3643SJeff Mahoney static int free_bitmap_nodes(struct super_block *sb) 261bd4c625cSLinus Torvalds { 262a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 2631da177e4SLinus Torvalds struct list_head *next = journal->j_bitmap_nodes.next; 2641da177e4SLinus Torvalds struct reiserfs_bitmap_node *bn; 2651da177e4SLinus Torvalds 2661da177e4SLinus Torvalds while (next != &journal->j_bitmap_nodes) { 2671da177e4SLinus Torvalds bn = list_entry(next, struct reiserfs_bitmap_node, list); 2681da177e4SLinus Torvalds list_del(next); 269d739b42bSPekka Enberg kfree(bn->data); 270d739b42bSPekka Enberg kfree(bn); 2711da177e4SLinus Torvalds next = journal->j_bitmap_nodes.next; 2721da177e4SLinus Torvalds journal->j_free_bitmap_nodes--; 2731da177e4SLinus Torvalds } 2741da177e4SLinus Torvalds 2751da177e4SLinus Torvalds return 0; 2761da177e4SLinus Torvalds } 2771da177e4SLinus Torvalds 2781da177e4SLinus Torvalds /* 2791da177e4SLinus Torvalds ** get memory for JOURNAL_NUM_BITMAPS worth of bitmaps. 2801da177e4SLinus Torvalds ** jb_array is the array to be filled in. 2811da177e4SLinus Torvalds */ 282a9dd3643SJeff Mahoney int reiserfs_allocate_list_bitmaps(struct super_block *sb, 2831da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb_array, 2843ee16670SJeff Mahoney unsigned int bmap_nr) 285bd4c625cSLinus Torvalds { 2861da177e4SLinus Torvalds int i; 2871da177e4SLinus Torvalds int failed = 0; 2881da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb; 2891da177e4SLinus Torvalds int mem = bmap_nr * sizeof(struct reiserfs_bitmap_node *); 2901da177e4SLinus Torvalds 2911da177e4SLinus Torvalds for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { 2921da177e4SLinus Torvalds jb = jb_array + i; 2931da177e4SLinus Torvalds jb->journal_list = NULL; 294558feb08SJoe Perches jb->bitmaps = vzalloc(mem); 2951da177e4SLinus Torvalds if (!jb->bitmaps) { 296a9dd3643SJeff Mahoney reiserfs_warning(sb, "clm-2000", "unable to " 29745b03d5eSJeff Mahoney "allocate bitmaps for journal lists"); 2981da177e4SLinus Torvalds failed = 1; 2991da177e4SLinus Torvalds break; 3001da177e4SLinus Torvalds } 3011da177e4SLinus Torvalds } 3021da177e4SLinus Torvalds if (failed) { 303a9dd3643SJeff Mahoney free_list_bitmaps(sb, jb_array); 3041da177e4SLinus Torvalds return -1; 3051da177e4SLinus Torvalds } 3061da177e4SLinus Torvalds return 0; 3071da177e4SLinus Torvalds } 3081da177e4SLinus Torvalds 3091da177e4SLinus Torvalds /* 3101da177e4SLinus Torvalds ** find an available list bitmap. If you can't find one, flush a commit list 3111da177e4SLinus Torvalds ** and try again 3121da177e4SLinus Torvalds */ 313a9dd3643SJeff Mahoney static struct reiserfs_list_bitmap *get_list_bitmap(struct super_block *sb, 314bd4c625cSLinus Torvalds struct reiserfs_journal_list 315bd4c625cSLinus Torvalds *jl) 316bd4c625cSLinus Torvalds { 3171da177e4SLinus Torvalds int i, j; 318a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 3191da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb = NULL; 3201da177e4SLinus Torvalds 3211da177e4SLinus Torvalds for (j = 0; j < (JOURNAL_NUM_BITMAPS * 3); j++) { 3221da177e4SLinus Torvalds i = journal->j_list_bitmap_index; 3231da177e4SLinus Torvalds journal->j_list_bitmap_index = (i + 1) % JOURNAL_NUM_BITMAPS; 3241da177e4SLinus Torvalds jb = journal->j_list_bitmap + i; 3251da177e4SLinus Torvalds if (journal->j_list_bitmap[i].journal_list) { 326a9dd3643SJeff Mahoney flush_commit_list(sb, 327bd4c625cSLinus Torvalds journal->j_list_bitmap[i]. 328bd4c625cSLinus Torvalds journal_list, 1); 3291da177e4SLinus Torvalds if (!journal->j_list_bitmap[i].journal_list) { 3301da177e4SLinus Torvalds break; 3311da177e4SLinus Torvalds } 3321da177e4SLinus Torvalds } else { 3331da177e4SLinus Torvalds break; 3341da177e4SLinus Torvalds } 3351da177e4SLinus Torvalds } 3361da177e4SLinus Torvalds if (jb->journal_list) { /* double check to make sure if flushed correctly */ 3371da177e4SLinus Torvalds return NULL; 3381da177e4SLinus Torvalds } 3391da177e4SLinus Torvalds jb->journal_list = jl; 3401da177e4SLinus Torvalds return jb; 3411da177e4SLinus Torvalds } 3421da177e4SLinus Torvalds 3431da177e4SLinus Torvalds /* 3441da177e4SLinus Torvalds ** allocates a new chunk of X nodes, and links them all together as a list. 3451da177e4SLinus Torvalds ** Uses the cnode->next and cnode->prev pointers 3461da177e4SLinus Torvalds ** returns NULL on failure 3471da177e4SLinus Torvalds */ 348bd4c625cSLinus Torvalds static struct reiserfs_journal_cnode *allocate_cnodes(int num_cnodes) 349bd4c625cSLinus Torvalds { 3501da177e4SLinus Torvalds struct reiserfs_journal_cnode *head; 3511da177e4SLinus Torvalds int i; 3521da177e4SLinus Torvalds if (num_cnodes <= 0) { 3531da177e4SLinus Torvalds return NULL; 3541da177e4SLinus Torvalds } 355558feb08SJoe Perches head = vzalloc(num_cnodes * sizeof(struct reiserfs_journal_cnode)); 3561da177e4SLinus Torvalds if (!head) { 3571da177e4SLinus Torvalds return NULL; 3581da177e4SLinus Torvalds } 3591da177e4SLinus Torvalds head[0].prev = NULL; 3601da177e4SLinus Torvalds head[0].next = head + 1; 3611da177e4SLinus Torvalds for (i = 1; i < num_cnodes; i++) { 3621da177e4SLinus Torvalds head[i].prev = head + (i - 1); 3631da177e4SLinus Torvalds head[i].next = head + (i + 1); /* if last one, overwrite it after the if */ 3641da177e4SLinus Torvalds } 3651da177e4SLinus Torvalds head[num_cnodes - 1].next = NULL; 3661da177e4SLinus Torvalds return head; 3671da177e4SLinus Torvalds } 3681da177e4SLinus Torvalds 3691da177e4SLinus Torvalds /* 3701da177e4SLinus Torvalds ** pulls a cnode off the free list, or returns NULL on failure 3711da177e4SLinus Torvalds */ 372a9dd3643SJeff Mahoney static struct reiserfs_journal_cnode *get_cnode(struct super_block *sb) 373bd4c625cSLinus Torvalds { 3741da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 375a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 3761da177e4SLinus Torvalds 377a9dd3643SJeff Mahoney reiserfs_check_lock_depth(sb, "get_cnode"); 3781da177e4SLinus Torvalds 3791da177e4SLinus Torvalds if (journal->j_cnode_free <= 0) { 3801da177e4SLinus Torvalds return NULL; 3811da177e4SLinus Torvalds } 3821da177e4SLinus Torvalds journal->j_cnode_used++; 3831da177e4SLinus Torvalds journal->j_cnode_free--; 3841da177e4SLinus Torvalds cn = journal->j_cnode_free_list; 3851da177e4SLinus Torvalds if (!cn) { 3861da177e4SLinus Torvalds return cn; 3871da177e4SLinus Torvalds } 3881da177e4SLinus Torvalds if (cn->next) { 3891da177e4SLinus Torvalds cn->next->prev = NULL; 3901da177e4SLinus Torvalds } 3911da177e4SLinus Torvalds journal->j_cnode_free_list = cn->next; 3921da177e4SLinus Torvalds memset(cn, 0, sizeof(struct reiserfs_journal_cnode)); 3931da177e4SLinus Torvalds return cn; 3941da177e4SLinus Torvalds } 3951da177e4SLinus Torvalds 3961da177e4SLinus Torvalds /* 3971da177e4SLinus Torvalds ** returns a cnode to the free list 3981da177e4SLinus Torvalds */ 399a9dd3643SJeff Mahoney static void free_cnode(struct super_block *sb, 400bd4c625cSLinus Torvalds struct reiserfs_journal_cnode *cn) 401bd4c625cSLinus Torvalds { 402a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 4031da177e4SLinus Torvalds 404a9dd3643SJeff Mahoney reiserfs_check_lock_depth(sb, "free_cnode"); 4051da177e4SLinus Torvalds 4061da177e4SLinus Torvalds journal->j_cnode_used--; 4071da177e4SLinus Torvalds journal->j_cnode_free++; 4081da177e4SLinus Torvalds /* memset(cn, 0, sizeof(struct reiserfs_journal_cnode)) ; */ 4091da177e4SLinus Torvalds cn->next = journal->j_cnode_free_list; 4101da177e4SLinus Torvalds if (journal->j_cnode_free_list) { 4111da177e4SLinus Torvalds journal->j_cnode_free_list->prev = cn; 4121da177e4SLinus Torvalds } 4131da177e4SLinus Torvalds cn->prev = NULL; /* not needed with the memset, but I might kill the memset, and forget to do this */ 4141da177e4SLinus Torvalds journal->j_cnode_free_list = cn; 4151da177e4SLinus Torvalds } 4161da177e4SLinus Torvalds 417bd4c625cSLinus Torvalds static void clear_prepared_bits(struct buffer_head *bh) 418bd4c625cSLinus Torvalds { 4191da177e4SLinus Torvalds clear_buffer_journal_prepared(bh); 4201da177e4SLinus Torvalds clear_buffer_journal_restore_dirty(bh); 4211da177e4SLinus Torvalds } 4221da177e4SLinus Torvalds 4231da177e4SLinus Torvalds /* return a cnode with same dev, block number and size in table, or null if not found */ 424bd4c625cSLinus Torvalds static inline struct reiserfs_journal_cnode *get_journal_hash_dev(struct 425bd4c625cSLinus Torvalds super_block 426bd4c625cSLinus Torvalds *sb, 427bd4c625cSLinus Torvalds struct 428bd4c625cSLinus Torvalds reiserfs_journal_cnode 429bd4c625cSLinus Torvalds **table, 4301da177e4SLinus Torvalds long bl) 4311da177e4SLinus Torvalds { 4321da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 4331da177e4SLinus Torvalds cn = journal_hash(table, sb, bl); 4341da177e4SLinus Torvalds while (cn) { 4351da177e4SLinus Torvalds if (cn->blocknr == bl && cn->sb == sb) 4361da177e4SLinus Torvalds return cn; 4371da177e4SLinus Torvalds cn = cn->hnext; 4381da177e4SLinus Torvalds } 4391da177e4SLinus Torvalds return (struct reiserfs_journal_cnode *)0; 4401da177e4SLinus Torvalds } 4411da177e4SLinus Torvalds 4421da177e4SLinus Torvalds /* 4431da177e4SLinus Torvalds ** this actually means 'can this block be reallocated yet?'. If you set search_all, a block can only be allocated 4441da177e4SLinus Torvalds ** if it is not in the current transaction, was not freed by the current transaction, and has no chance of ever 4451da177e4SLinus Torvalds ** being overwritten by a replay after crashing. 4461da177e4SLinus Torvalds ** 4471da177e4SLinus Torvalds ** If you don't set search_all, a block can only be allocated if it is not in the current transaction. Since deleting 4481da177e4SLinus Torvalds ** a block removes it from the current transaction, this case should never happen. If you don't set search_all, make 4491da177e4SLinus Torvalds ** sure you never write the block without logging it. 4501da177e4SLinus Torvalds ** 4511da177e4SLinus Torvalds ** next_zero_bit is a suggestion about the next block to try for find_forward. 4521da177e4SLinus Torvalds ** when bl is rejected because it is set in a journal list bitmap, we search 4531da177e4SLinus Torvalds ** for the next zero bit in the bitmap that rejected bl. Then, we return that 4541da177e4SLinus Torvalds ** through next_zero_bit for find_forward to try. 4551da177e4SLinus Torvalds ** 4561da177e4SLinus Torvalds ** Just because we return something in next_zero_bit does not mean we won't 4571da177e4SLinus Torvalds ** reject it on the next call to reiserfs_in_journal 4581da177e4SLinus Torvalds ** 4591da177e4SLinus Torvalds */ 460a9dd3643SJeff Mahoney int reiserfs_in_journal(struct super_block *sb, 4613ee16670SJeff Mahoney unsigned int bmap_nr, int bit_nr, int search_all, 462bd4c625cSLinus Torvalds b_blocknr_t * next_zero_bit) 463bd4c625cSLinus Torvalds { 464a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 4651da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 4661da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb; 4671da177e4SLinus Torvalds int i; 4681da177e4SLinus Torvalds unsigned long bl; 4691da177e4SLinus Torvalds 4701da177e4SLinus Torvalds *next_zero_bit = 0; /* always start this at zero. */ 4711da177e4SLinus Torvalds 472a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.in_journal); 4731da177e4SLinus Torvalds /* If we aren't doing a search_all, this is a metablock, and it will be logged before use. 4741da177e4SLinus Torvalds ** if we crash before the transaction that freed it commits, this transaction won't 4751da177e4SLinus Torvalds ** have committed either, and the block will never be written 4761da177e4SLinus Torvalds */ 4771da177e4SLinus Torvalds if (search_all) { 4781da177e4SLinus Torvalds for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { 479a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.in_journal_bitmap); 4801da177e4SLinus Torvalds jb = journal->j_list_bitmap + i; 4811da177e4SLinus Torvalds if (jb->journal_list && jb->bitmaps[bmap_nr] && 482bd4c625cSLinus Torvalds test_bit(bit_nr, 483bd4c625cSLinus Torvalds (unsigned long *)jb->bitmaps[bmap_nr]-> 484bd4c625cSLinus Torvalds data)) { 485bd4c625cSLinus Torvalds *next_zero_bit = 486bd4c625cSLinus Torvalds find_next_zero_bit((unsigned long *) 487bd4c625cSLinus Torvalds (jb->bitmaps[bmap_nr]-> 488bd4c625cSLinus Torvalds data), 489a9dd3643SJeff Mahoney sb->s_blocksize << 3, 490bd4c625cSLinus Torvalds bit_nr + 1); 4911da177e4SLinus Torvalds return 1; 4921da177e4SLinus Torvalds } 4931da177e4SLinus Torvalds } 4941da177e4SLinus Torvalds } 4951da177e4SLinus Torvalds 496a9dd3643SJeff Mahoney bl = bmap_nr * (sb->s_blocksize << 3) + bit_nr; 4971da177e4SLinus Torvalds /* is it in any old transactions? */ 498bd4c625cSLinus Torvalds if (search_all 499bd4c625cSLinus Torvalds && (cn = 500a9dd3643SJeff Mahoney get_journal_hash_dev(sb, journal->j_list_hash_table, bl))) { 5011da177e4SLinus Torvalds return 1; 5021da177e4SLinus Torvalds } 5031da177e4SLinus Torvalds 5041da177e4SLinus Torvalds /* is it in the current transaction. This should never happen */ 505a9dd3643SJeff Mahoney if ((cn = get_journal_hash_dev(sb, journal->j_hash_table, bl))) { 5061da177e4SLinus Torvalds BUG(); 5071da177e4SLinus Torvalds return 1; 5081da177e4SLinus Torvalds } 5091da177e4SLinus Torvalds 510a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.in_journal_reusable); 5111da177e4SLinus Torvalds /* safe for reuse */ 5121da177e4SLinus Torvalds return 0; 5131da177e4SLinus Torvalds } 5141da177e4SLinus Torvalds 5151da177e4SLinus Torvalds /* insert cn into table 5161da177e4SLinus Torvalds */ 517bd4c625cSLinus Torvalds static inline void insert_journal_hash(struct reiserfs_journal_cnode **table, 518bd4c625cSLinus Torvalds struct reiserfs_journal_cnode *cn) 519bd4c625cSLinus Torvalds { 5201da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn_orig; 5211da177e4SLinus Torvalds 5221da177e4SLinus Torvalds cn_orig = journal_hash(table, cn->sb, cn->blocknr); 5231da177e4SLinus Torvalds cn->hnext = cn_orig; 5241da177e4SLinus Torvalds cn->hprev = NULL; 5251da177e4SLinus Torvalds if (cn_orig) { 5261da177e4SLinus Torvalds cn_orig->hprev = cn; 5271da177e4SLinus Torvalds } 5281da177e4SLinus Torvalds journal_hash(table, cn->sb, cn->blocknr) = cn; 5291da177e4SLinus Torvalds } 5301da177e4SLinus Torvalds 5311da177e4SLinus Torvalds /* lock the current transaction */ 532a9dd3643SJeff Mahoney static inline void lock_journal(struct super_block *sb) 533bd4c625cSLinus Torvalds { 534a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.lock_journal); 5358ebc4232SFrederic Weisbecker 5368ebc4232SFrederic Weisbecker reiserfs_mutex_lock_safe(&SB_JOURNAL(sb)->j_mutex, sb); 5371da177e4SLinus Torvalds } 5381da177e4SLinus Torvalds 5391da177e4SLinus Torvalds /* unlock the current transaction */ 540a9dd3643SJeff Mahoney static inline void unlock_journal(struct super_block *sb) 541bd4c625cSLinus Torvalds { 542a9dd3643SJeff Mahoney mutex_unlock(&SB_JOURNAL(sb)->j_mutex); 5431da177e4SLinus Torvalds } 5441da177e4SLinus Torvalds 5451da177e4SLinus Torvalds static inline void get_journal_list(struct reiserfs_journal_list *jl) 5461da177e4SLinus Torvalds { 5471da177e4SLinus Torvalds jl->j_refcount++; 5481da177e4SLinus Torvalds } 5491da177e4SLinus Torvalds 5501da177e4SLinus Torvalds static inline void put_journal_list(struct super_block *s, 5511da177e4SLinus Torvalds struct reiserfs_journal_list *jl) 5521da177e4SLinus Torvalds { 5531da177e4SLinus Torvalds if (jl->j_refcount < 1) { 554c3a9c210SJeff Mahoney reiserfs_panic(s, "journal-2", "trans id %u, refcount at %d", 555bd4c625cSLinus Torvalds jl->j_trans_id, jl->j_refcount); 5561da177e4SLinus Torvalds } 5571da177e4SLinus Torvalds if (--jl->j_refcount == 0) 558d739b42bSPekka Enberg kfree(jl); 5591da177e4SLinus Torvalds } 5601da177e4SLinus Torvalds 5611da177e4SLinus Torvalds /* 5621da177e4SLinus Torvalds ** this used to be much more involved, and I'm keeping it just in case things get ugly again. 5631da177e4SLinus Torvalds ** it gets called by flush_commit_list, and cleans up any data stored about blocks freed during a 5641da177e4SLinus Torvalds ** transaction. 5651da177e4SLinus Torvalds */ 566a9dd3643SJeff Mahoney static void cleanup_freed_for_journal_list(struct super_block *sb, 567bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl) 568bd4c625cSLinus Torvalds { 5691da177e4SLinus Torvalds 5701da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb = jl->j_list_bitmap; 5711da177e4SLinus Torvalds if (jb) { 572a9dd3643SJeff Mahoney cleanup_bitmap_list(sb, jb); 5731da177e4SLinus Torvalds } 5741da177e4SLinus Torvalds jl->j_list_bitmap->journal_list = NULL; 5751da177e4SLinus Torvalds jl->j_list_bitmap = NULL; 5761da177e4SLinus Torvalds } 5771da177e4SLinus Torvalds 5781da177e4SLinus Torvalds static int journal_list_still_alive(struct super_block *s, 579600ed416SJeff Mahoney unsigned int trans_id) 5801da177e4SLinus Torvalds { 5811da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 5821da177e4SLinus Torvalds struct list_head *entry = &journal->j_journal_list; 5831da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 5841da177e4SLinus Torvalds 5851da177e4SLinus Torvalds if (!list_empty(entry)) { 5861da177e4SLinus Torvalds jl = JOURNAL_LIST_ENTRY(entry->next); 5871da177e4SLinus Torvalds if (jl->j_trans_id <= trans_id) { 5881da177e4SLinus Torvalds return 1; 5891da177e4SLinus Torvalds } 5901da177e4SLinus Torvalds } 5911da177e4SLinus Torvalds return 0; 5921da177e4SLinus Torvalds } 5931da177e4SLinus Torvalds 594398c95bdSChris Mason /* 595398c95bdSChris Mason * If page->mapping was null, we failed to truncate this page for 596398c95bdSChris Mason * some reason. Most likely because it was truncated after being 597398c95bdSChris Mason * logged via data=journal. 598398c95bdSChris Mason * 599398c95bdSChris Mason * This does a check to see if the buffer belongs to one of these 600398c95bdSChris Mason * lost pages before doing the final put_bh. If page->mapping was 601398c95bdSChris Mason * null, it tries to free buffers on the page, which should make the 602398c95bdSChris Mason * final page_cache_release drop the page from the lru. 603398c95bdSChris Mason */ 604398c95bdSChris Mason static void release_buffer_page(struct buffer_head *bh) 605398c95bdSChris Mason { 606398c95bdSChris Mason struct page *page = bh->b_page; 607529ae9aaSNick Piggin if (!page->mapping && trylock_page(page)) { 608398c95bdSChris Mason page_cache_get(page); 609398c95bdSChris Mason put_bh(bh); 610398c95bdSChris Mason if (!page->mapping) 611398c95bdSChris Mason try_to_free_buffers(page); 612398c95bdSChris Mason unlock_page(page); 613398c95bdSChris Mason page_cache_release(page); 614398c95bdSChris Mason } else { 615398c95bdSChris Mason put_bh(bh); 616398c95bdSChris Mason } 617398c95bdSChris Mason } 618398c95bdSChris Mason 619bd4c625cSLinus Torvalds static void reiserfs_end_buffer_io_sync(struct buffer_head *bh, int uptodate) 620bd4c625cSLinus Torvalds { 6211da177e4SLinus Torvalds char b[BDEVNAME_SIZE]; 6221da177e4SLinus Torvalds 6231da177e4SLinus Torvalds if (buffer_journaled(bh)) { 62445b03d5eSJeff Mahoney reiserfs_warning(NULL, "clm-2084", 62545b03d5eSJeff Mahoney "pinned buffer %lu:%s sent to disk", 6261da177e4SLinus Torvalds bh->b_blocknr, bdevname(bh->b_bdev, b)); 6271da177e4SLinus Torvalds } 6281da177e4SLinus Torvalds if (uptodate) 6291da177e4SLinus Torvalds set_buffer_uptodate(bh); 6301da177e4SLinus Torvalds else 6311da177e4SLinus Torvalds clear_buffer_uptodate(bh); 632398c95bdSChris Mason 6331da177e4SLinus Torvalds unlock_buffer(bh); 634398c95bdSChris Mason release_buffer_page(bh); 6351da177e4SLinus Torvalds } 6361da177e4SLinus Torvalds 637bd4c625cSLinus Torvalds static void reiserfs_end_ordered_io(struct buffer_head *bh, int uptodate) 638bd4c625cSLinus Torvalds { 6391da177e4SLinus Torvalds if (uptodate) 6401da177e4SLinus Torvalds set_buffer_uptodate(bh); 6411da177e4SLinus Torvalds else 6421da177e4SLinus Torvalds clear_buffer_uptodate(bh); 6431da177e4SLinus Torvalds unlock_buffer(bh); 6441da177e4SLinus Torvalds put_bh(bh); 6451da177e4SLinus Torvalds } 6461da177e4SLinus Torvalds 647bd4c625cSLinus Torvalds static void submit_logged_buffer(struct buffer_head *bh) 648bd4c625cSLinus Torvalds { 6491da177e4SLinus Torvalds get_bh(bh); 6501da177e4SLinus Torvalds bh->b_end_io = reiserfs_end_buffer_io_sync; 6511da177e4SLinus Torvalds clear_buffer_journal_new(bh); 6521da177e4SLinus Torvalds clear_buffer_dirty(bh); 6531da177e4SLinus Torvalds if (!test_clear_buffer_journal_test(bh)) 6541da177e4SLinus Torvalds BUG(); 6551da177e4SLinus Torvalds if (!buffer_uptodate(bh)) 6561da177e4SLinus Torvalds BUG(); 6571da177e4SLinus Torvalds submit_bh(WRITE, bh); 6581da177e4SLinus Torvalds } 6591da177e4SLinus Torvalds 660bd4c625cSLinus Torvalds static void submit_ordered_buffer(struct buffer_head *bh) 661bd4c625cSLinus Torvalds { 6621da177e4SLinus Torvalds get_bh(bh); 6631da177e4SLinus Torvalds bh->b_end_io = reiserfs_end_ordered_io; 6641da177e4SLinus Torvalds clear_buffer_dirty(bh); 6651da177e4SLinus Torvalds if (!buffer_uptodate(bh)) 6661da177e4SLinus Torvalds BUG(); 6671da177e4SLinus Torvalds submit_bh(WRITE, bh); 6681da177e4SLinus Torvalds } 6691da177e4SLinus Torvalds 6701da177e4SLinus Torvalds #define CHUNK_SIZE 32 6711da177e4SLinus Torvalds struct buffer_chunk { 6721da177e4SLinus Torvalds struct buffer_head *bh[CHUNK_SIZE]; 6731da177e4SLinus Torvalds int nr; 6741da177e4SLinus Torvalds }; 6751da177e4SLinus Torvalds 676bd4c625cSLinus Torvalds static void write_chunk(struct buffer_chunk *chunk) 677bd4c625cSLinus Torvalds { 6781da177e4SLinus Torvalds int i; 6791da177e4SLinus Torvalds for (i = 0; i < chunk->nr; i++) { 6801da177e4SLinus Torvalds submit_logged_buffer(chunk->bh[i]); 6811da177e4SLinus Torvalds } 6821da177e4SLinus Torvalds chunk->nr = 0; 6831da177e4SLinus Torvalds } 6841da177e4SLinus Torvalds 685bd4c625cSLinus Torvalds static void write_ordered_chunk(struct buffer_chunk *chunk) 686bd4c625cSLinus Torvalds { 6871da177e4SLinus Torvalds int i; 6881da177e4SLinus Torvalds for (i = 0; i < chunk->nr; i++) { 6891da177e4SLinus Torvalds submit_ordered_buffer(chunk->bh[i]); 6901da177e4SLinus Torvalds } 6911da177e4SLinus Torvalds chunk->nr = 0; 6921da177e4SLinus Torvalds } 6931da177e4SLinus Torvalds 6941da177e4SLinus Torvalds static int add_to_chunk(struct buffer_chunk *chunk, struct buffer_head *bh, 695bd4c625cSLinus Torvalds spinlock_t * lock, void (fn) (struct buffer_chunk *)) 6961da177e4SLinus Torvalds { 6971da177e4SLinus Torvalds int ret = 0; 69814a61442SEric Sesterhenn BUG_ON(chunk->nr >= CHUNK_SIZE); 6991da177e4SLinus Torvalds chunk->bh[chunk->nr++] = bh; 7001da177e4SLinus Torvalds if (chunk->nr >= CHUNK_SIZE) { 7011da177e4SLinus Torvalds ret = 1; 7021da177e4SLinus Torvalds if (lock) 7031da177e4SLinus Torvalds spin_unlock(lock); 7041da177e4SLinus Torvalds fn(chunk); 7051da177e4SLinus Torvalds if (lock) 7061da177e4SLinus Torvalds spin_lock(lock); 7071da177e4SLinus Torvalds } 7081da177e4SLinus Torvalds return ret; 7091da177e4SLinus Torvalds } 7101da177e4SLinus Torvalds 7111da177e4SLinus Torvalds static atomic_t nr_reiserfs_jh = ATOMIC_INIT(0); 712bd4c625cSLinus Torvalds static struct reiserfs_jh *alloc_jh(void) 713bd4c625cSLinus Torvalds { 7141da177e4SLinus Torvalds struct reiserfs_jh *jh; 7151da177e4SLinus Torvalds while (1) { 7161da177e4SLinus Torvalds jh = kmalloc(sizeof(*jh), GFP_NOFS); 7171da177e4SLinus Torvalds if (jh) { 7181da177e4SLinus Torvalds atomic_inc(&nr_reiserfs_jh); 7191da177e4SLinus Torvalds return jh; 7201da177e4SLinus Torvalds } 7211da177e4SLinus Torvalds yield(); 7221da177e4SLinus Torvalds } 7231da177e4SLinus Torvalds } 7241da177e4SLinus Torvalds 7251da177e4SLinus Torvalds /* 7261da177e4SLinus Torvalds * we want to free the jh when the buffer has been written 7271da177e4SLinus Torvalds * and waited on 7281da177e4SLinus Torvalds */ 729bd4c625cSLinus Torvalds void reiserfs_free_jh(struct buffer_head *bh) 730bd4c625cSLinus Torvalds { 7311da177e4SLinus Torvalds struct reiserfs_jh *jh; 7321da177e4SLinus Torvalds 7331da177e4SLinus Torvalds jh = bh->b_private; 7341da177e4SLinus Torvalds if (jh) { 7351da177e4SLinus Torvalds bh->b_private = NULL; 7361da177e4SLinus Torvalds jh->bh = NULL; 7371da177e4SLinus Torvalds list_del_init(&jh->list); 7381da177e4SLinus Torvalds kfree(jh); 7391da177e4SLinus Torvalds if (atomic_read(&nr_reiserfs_jh) <= 0) 7401da177e4SLinus Torvalds BUG(); 7411da177e4SLinus Torvalds atomic_dec(&nr_reiserfs_jh); 7421da177e4SLinus Torvalds put_bh(bh); 7431da177e4SLinus Torvalds } 7441da177e4SLinus Torvalds } 7451da177e4SLinus Torvalds 7461da177e4SLinus Torvalds static inline int __add_jh(struct reiserfs_journal *j, struct buffer_head *bh, 7471da177e4SLinus Torvalds int tail) 7481da177e4SLinus Torvalds { 7491da177e4SLinus Torvalds struct reiserfs_jh *jh; 7501da177e4SLinus Torvalds 7511da177e4SLinus Torvalds if (bh->b_private) { 7521da177e4SLinus Torvalds spin_lock(&j->j_dirty_buffers_lock); 7531da177e4SLinus Torvalds if (!bh->b_private) { 7541da177e4SLinus Torvalds spin_unlock(&j->j_dirty_buffers_lock); 7551da177e4SLinus Torvalds goto no_jh; 7561da177e4SLinus Torvalds } 7571da177e4SLinus Torvalds jh = bh->b_private; 7581da177e4SLinus Torvalds list_del_init(&jh->list); 7591da177e4SLinus Torvalds } else { 7601da177e4SLinus Torvalds no_jh: 7611da177e4SLinus Torvalds get_bh(bh); 7621da177e4SLinus Torvalds jh = alloc_jh(); 7631da177e4SLinus Torvalds spin_lock(&j->j_dirty_buffers_lock); 7641da177e4SLinus Torvalds /* buffer must be locked for __add_jh, should be able to have 7651da177e4SLinus Torvalds * two adds at the same time 7661da177e4SLinus Torvalds */ 76714a61442SEric Sesterhenn BUG_ON(bh->b_private); 7681da177e4SLinus Torvalds jh->bh = bh; 7691da177e4SLinus Torvalds bh->b_private = jh; 7701da177e4SLinus Torvalds } 7711da177e4SLinus Torvalds jh->jl = j->j_current_jl; 7721da177e4SLinus Torvalds if (tail) 7731da177e4SLinus Torvalds list_add_tail(&jh->list, &jh->jl->j_tail_bh_list); 7741da177e4SLinus Torvalds else { 7751da177e4SLinus Torvalds list_add_tail(&jh->list, &jh->jl->j_bh_list); 7761da177e4SLinus Torvalds } 7771da177e4SLinus Torvalds spin_unlock(&j->j_dirty_buffers_lock); 7781da177e4SLinus Torvalds return 0; 7791da177e4SLinus Torvalds } 7801da177e4SLinus Torvalds 781bd4c625cSLinus Torvalds int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh) 782bd4c625cSLinus Torvalds { 7831da177e4SLinus Torvalds return __add_jh(SB_JOURNAL(inode->i_sb), bh, 1); 7841da177e4SLinus Torvalds } 785bd4c625cSLinus Torvalds int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh) 786bd4c625cSLinus Torvalds { 7871da177e4SLinus Torvalds return __add_jh(SB_JOURNAL(inode->i_sb), bh, 0); 7881da177e4SLinus Torvalds } 7891da177e4SLinus Torvalds 7901da177e4SLinus Torvalds #define JH_ENTRY(l) list_entry((l), struct reiserfs_jh, list) 7911da177e4SLinus Torvalds static int write_ordered_buffers(spinlock_t * lock, 7921da177e4SLinus Torvalds struct reiserfs_journal *j, 7931da177e4SLinus Torvalds struct reiserfs_journal_list *jl, 7941da177e4SLinus Torvalds struct list_head *list) 7951da177e4SLinus Torvalds { 7961da177e4SLinus Torvalds struct buffer_head *bh; 7971da177e4SLinus Torvalds struct reiserfs_jh *jh; 7981da177e4SLinus Torvalds int ret = j->j_errno; 7991da177e4SLinus Torvalds struct buffer_chunk chunk; 8001da177e4SLinus Torvalds struct list_head tmp; 8011da177e4SLinus Torvalds INIT_LIST_HEAD(&tmp); 8021da177e4SLinus Torvalds 8031da177e4SLinus Torvalds chunk.nr = 0; 8041da177e4SLinus Torvalds spin_lock(lock); 8051da177e4SLinus Torvalds while (!list_empty(list)) { 8061da177e4SLinus Torvalds jh = JH_ENTRY(list->next); 8071da177e4SLinus Torvalds bh = jh->bh; 8081da177e4SLinus Torvalds get_bh(bh); 809ca5de404SNick Piggin if (!trylock_buffer(bh)) { 8101da177e4SLinus Torvalds if (!buffer_dirty(bh)) { 811f116629dSAkinobu Mita list_move(&jh->list, &tmp); 8121da177e4SLinus Torvalds goto loop_next; 8131da177e4SLinus Torvalds } 8141da177e4SLinus Torvalds spin_unlock(lock); 8151da177e4SLinus Torvalds if (chunk.nr) 8161da177e4SLinus Torvalds write_ordered_chunk(&chunk); 8171da177e4SLinus Torvalds wait_on_buffer(bh); 8181da177e4SLinus Torvalds cond_resched(); 8191da177e4SLinus Torvalds spin_lock(lock); 8201da177e4SLinus Torvalds goto loop_next; 8211da177e4SLinus Torvalds } 8223d4492f8SChris Mason /* in theory, dirty non-uptodate buffers should never get here, 8233d4492f8SChris Mason * but the upper layer io error paths still have a few quirks. 8243d4492f8SChris Mason * Handle them here as gracefully as we can 8253d4492f8SChris Mason */ 8263d4492f8SChris Mason if (!buffer_uptodate(bh) && buffer_dirty(bh)) { 8273d4492f8SChris Mason clear_buffer_dirty(bh); 8283d4492f8SChris Mason ret = -EIO; 8293d4492f8SChris Mason } 8301da177e4SLinus Torvalds if (buffer_dirty(bh)) { 831f116629dSAkinobu Mita list_move(&jh->list, &tmp); 8321da177e4SLinus Torvalds add_to_chunk(&chunk, bh, lock, write_ordered_chunk); 8331da177e4SLinus Torvalds } else { 8341da177e4SLinus Torvalds reiserfs_free_jh(bh); 8351da177e4SLinus Torvalds unlock_buffer(bh); 8361da177e4SLinus Torvalds } 8371da177e4SLinus Torvalds loop_next: 8381da177e4SLinus Torvalds put_bh(bh); 8391da177e4SLinus Torvalds cond_resched_lock(lock); 8401da177e4SLinus Torvalds } 8411da177e4SLinus Torvalds if (chunk.nr) { 8421da177e4SLinus Torvalds spin_unlock(lock); 8431da177e4SLinus Torvalds write_ordered_chunk(&chunk); 8441da177e4SLinus Torvalds spin_lock(lock); 8451da177e4SLinus Torvalds } 8461da177e4SLinus Torvalds while (!list_empty(&tmp)) { 8471da177e4SLinus Torvalds jh = JH_ENTRY(tmp.prev); 8481da177e4SLinus Torvalds bh = jh->bh; 8491da177e4SLinus Torvalds get_bh(bh); 8501da177e4SLinus Torvalds reiserfs_free_jh(bh); 8511da177e4SLinus Torvalds 8521da177e4SLinus Torvalds if (buffer_locked(bh)) { 8531da177e4SLinus Torvalds spin_unlock(lock); 8541da177e4SLinus Torvalds wait_on_buffer(bh); 8551da177e4SLinus Torvalds spin_lock(lock); 8561da177e4SLinus Torvalds } 8571da177e4SLinus Torvalds if (!buffer_uptodate(bh)) { 8581da177e4SLinus Torvalds ret = -EIO; 8591da177e4SLinus Torvalds } 860d62b1b87SChris Mason /* ugly interaction with invalidatepage here. 861d62b1b87SChris Mason * reiserfs_invalidate_page will pin any buffer that has a valid 862d62b1b87SChris Mason * journal head from an older transaction. If someone else sets 863d62b1b87SChris Mason * our buffer dirty after we write it in the first loop, and 864d62b1b87SChris Mason * then someone truncates the page away, nobody will ever write 865d62b1b87SChris Mason * the buffer. We're safe if we write the page one last time 866d62b1b87SChris Mason * after freeing the journal header. 867d62b1b87SChris Mason */ 868d62b1b87SChris Mason if (buffer_dirty(bh) && unlikely(bh->b_page->mapping == NULL)) { 869d62b1b87SChris Mason spin_unlock(lock); 870d62b1b87SChris Mason ll_rw_block(WRITE, 1, &bh); 871d62b1b87SChris Mason spin_lock(lock); 872d62b1b87SChris Mason } 8731da177e4SLinus Torvalds put_bh(bh); 8741da177e4SLinus Torvalds cond_resched_lock(lock); 8751da177e4SLinus Torvalds } 8761da177e4SLinus Torvalds spin_unlock(lock); 8771da177e4SLinus Torvalds return ret; 8781da177e4SLinus Torvalds } 8791da177e4SLinus Torvalds 880bd4c625cSLinus Torvalds static int flush_older_commits(struct super_block *s, 881bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl) 882bd4c625cSLinus Torvalds { 8831da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 8841da177e4SLinus Torvalds struct reiserfs_journal_list *other_jl; 8851da177e4SLinus Torvalds struct reiserfs_journal_list *first_jl; 8861da177e4SLinus Torvalds struct list_head *entry; 887600ed416SJeff Mahoney unsigned int trans_id = jl->j_trans_id; 888600ed416SJeff Mahoney unsigned int other_trans_id; 889600ed416SJeff Mahoney unsigned int first_trans_id; 8901da177e4SLinus Torvalds 8911da177e4SLinus Torvalds find_first: 8921da177e4SLinus Torvalds /* 8931da177e4SLinus Torvalds * first we walk backwards to find the oldest uncommitted transation 8941da177e4SLinus Torvalds */ 8951da177e4SLinus Torvalds first_jl = jl; 8961da177e4SLinus Torvalds entry = jl->j_list.prev; 8971da177e4SLinus Torvalds while (1) { 8981da177e4SLinus Torvalds other_jl = JOURNAL_LIST_ENTRY(entry); 8991da177e4SLinus Torvalds if (entry == &journal->j_journal_list || 9001da177e4SLinus Torvalds atomic_read(&other_jl->j_older_commits_done)) 9011da177e4SLinus Torvalds break; 9021da177e4SLinus Torvalds 9031da177e4SLinus Torvalds first_jl = other_jl; 9041da177e4SLinus Torvalds entry = other_jl->j_list.prev; 9051da177e4SLinus Torvalds } 9061da177e4SLinus Torvalds 9071da177e4SLinus Torvalds /* if we didn't find any older uncommitted transactions, return now */ 9081da177e4SLinus Torvalds if (first_jl == jl) { 9091da177e4SLinus Torvalds return 0; 9101da177e4SLinus Torvalds } 9111da177e4SLinus Torvalds 9121da177e4SLinus Torvalds first_trans_id = first_jl->j_trans_id; 9131da177e4SLinus Torvalds 9141da177e4SLinus Torvalds entry = &first_jl->j_list; 9151da177e4SLinus Torvalds while (1) { 9161da177e4SLinus Torvalds other_jl = JOURNAL_LIST_ENTRY(entry); 9171da177e4SLinus Torvalds other_trans_id = other_jl->j_trans_id; 9181da177e4SLinus Torvalds 9191da177e4SLinus Torvalds if (other_trans_id < trans_id) { 9201da177e4SLinus Torvalds if (atomic_read(&other_jl->j_commit_left) != 0) { 9211da177e4SLinus Torvalds flush_commit_list(s, other_jl, 0); 9221da177e4SLinus Torvalds 9231da177e4SLinus Torvalds /* list we were called with is gone, return */ 9241da177e4SLinus Torvalds if (!journal_list_still_alive(s, trans_id)) 9251da177e4SLinus Torvalds return 1; 9261da177e4SLinus Torvalds 9271da177e4SLinus Torvalds /* the one we just flushed is gone, this means all 9281da177e4SLinus Torvalds * older lists are also gone, so first_jl is no longer 9291da177e4SLinus Torvalds * valid either. Go back to the beginning. 9301da177e4SLinus Torvalds */ 931bd4c625cSLinus Torvalds if (!journal_list_still_alive 932bd4c625cSLinus Torvalds (s, other_trans_id)) { 9331da177e4SLinus Torvalds goto find_first; 9341da177e4SLinus Torvalds } 9351da177e4SLinus Torvalds } 9361da177e4SLinus Torvalds entry = entry->next; 9371da177e4SLinus Torvalds if (entry == &journal->j_journal_list) 9381da177e4SLinus Torvalds return 0; 9391da177e4SLinus Torvalds } else { 9401da177e4SLinus Torvalds return 0; 9411da177e4SLinus Torvalds } 9421da177e4SLinus Torvalds } 9431da177e4SLinus Torvalds return 0; 9441da177e4SLinus Torvalds } 945deba0f49SAdrian Bunk 946deba0f49SAdrian Bunk static int reiserfs_async_progress_wait(struct super_block *s) 947bd4c625cSLinus Torvalds { 9481da177e4SLinus Torvalds struct reiserfs_journal *j = SB_JOURNAL(s); 9498ebc4232SFrederic Weisbecker 9508ebc4232SFrederic Weisbecker if (atomic_read(&j->j_async_throttle)) { 9518ebc4232SFrederic Weisbecker reiserfs_write_unlock(s); 9528aa7e847SJens Axboe congestion_wait(BLK_RW_ASYNC, HZ / 10); 9538ebc4232SFrederic Weisbecker reiserfs_write_lock(s); 9548ebc4232SFrederic Weisbecker } 9558ebc4232SFrederic Weisbecker 9561da177e4SLinus Torvalds return 0; 9571da177e4SLinus Torvalds } 9581da177e4SLinus Torvalds 9591da177e4SLinus Torvalds /* 9601da177e4SLinus Torvalds ** if this journal list still has commit blocks unflushed, send them to disk. 9611da177e4SLinus Torvalds ** 9621da177e4SLinus Torvalds ** log areas must be flushed in order (transaction 2 can't commit before transaction 1) 9631da177e4SLinus Torvalds ** Before the commit block can by written, every other log block must be safely on disk 9641da177e4SLinus Torvalds ** 9651da177e4SLinus Torvalds */ 966bd4c625cSLinus Torvalds static int flush_commit_list(struct super_block *s, 967bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl, int flushall) 968bd4c625cSLinus Torvalds { 9691da177e4SLinus Torvalds int i; 9703ee16670SJeff Mahoney b_blocknr_t bn; 9711da177e4SLinus Torvalds struct buffer_head *tbh = NULL; 972600ed416SJeff Mahoney unsigned int trans_id = jl->j_trans_id; 9731da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 9741da177e4SLinus Torvalds int retval = 0; 975e0e851cfSChris Mason int write_len; 9761da177e4SLinus Torvalds 9771da177e4SLinus Torvalds reiserfs_check_lock_depth(s, "flush_commit_list"); 9781da177e4SLinus Torvalds 9791da177e4SLinus Torvalds if (atomic_read(&jl->j_older_commits_done)) { 9801da177e4SLinus Torvalds return 0; 9811da177e4SLinus Torvalds } 9821da177e4SLinus Torvalds 9831da177e4SLinus Torvalds /* before we can put our commit blocks on disk, we have to make sure everyone older than 9841da177e4SLinus Torvalds ** us is on disk too 9851da177e4SLinus Torvalds */ 9861da177e4SLinus Torvalds BUG_ON(jl->j_len <= 0); 9871da177e4SLinus Torvalds BUG_ON(trans_id == journal->j_trans_id); 9881da177e4SLinus Torvalds 9891da177e4SLinus Torvalds get_journal_list(jl); 9901da177e4SLinus Torvalds if (flushall) { 9911da177e4SLinus Torvalds if (flush_older_commits(s, jl) == 1) { 9921da177e4SLinus Torvalds /* list disappeared during flush_older_commits. return */ 9931da177e4SLinus Torvalds goto put_jl; 9941da177e4SLinus Torvalds } 9951da177e4SLinus Torvalds } 9961da177e4SLinus Torvalds 9971da177e4SLinus Torvalds /* make sure nobody is trying to flush this one at the same time */ 9988ebc4232SFrederic Weisbecker reiserfs_mutex_lock_safe(&jl->j_commit_mutex, s); 9998ebc4232SFrederic Weisbecker 10001da177e4SLinus Torvalds if (!journal_list_still_alive(s, trans_id)) { 100190415deaSJeff Mahoney mutex_unlock(&jl->j_commit_mutex); 10021da177e4SLinus Torvalds goto put_jl; 10031da177e4SLinus Torvalds } 10041da177e4SLinus Torvalds BUG_ON(jl->j_trans_id == 0); 10051da177e4SLinus Torvalds 10061da177e4SLinus Torvalds /* this commit is done, exit */ 10071da177e4SLinus Torvalds if (atomic_read(&(jl->j_commit_left)) <= 0) { 10081da177e4SLinus Torvalds if (flushall) { 10091da177e4SLinus Torvalds atomic_set(&(jl->j_older_commits_done), 1); 10101da177e4SLinus Torvalds } 101190415deaSJeff Mahoney mutex_unlock(&jl->j_commit_mutex); 10121da177e4SLinus Torvalds goto put_jl; 10131da177e4SLinus Torvalds } 10141da177e4SLinus Torvalds 10151da177e4SLinus Torvalds if (!list_empty(&jl->j_bh_list)) { 10163d4492f8SChris Mason int ret; 10178ebc4232SFrederic Weisbecker 10188ebc4232SFrederic Weisbecker /* 10198ebc4232SFrederic Weisbecker * We might sleep in numerous places inside 10208ebc4232SFrederic Weisbecker * write_ordered_buffers. Relax the write lock. 10218ebc4232SFrederic Weisbecker */ 10228ebc4232SFrederic Weisbecker reiserfs_write_unlock(s); 10233d4492f8SChris Mason ret = write_ordered_buffers(&journal->j_dirty_buffers_lock, 10241da177e4SLinus Torvalds journal, jl, &jl->j_bh_list); 10253d4492f8SChris Mason if (ret < 0 && retval == 0) 10263d4492f8SChris Mason retval = ret; 10278ebc4232SFrederic Weisbecker reiserfs_write_lock(s); 10281da177e4SLinus Torvalds } 10291da177e4SLinus Torvalds BUG_ON(!list_empty(&jl->j_bh_list)); 10301da177e4SLinus Torvalds /* 10311da177e4SLinus Torvalds * for the description block and all the log blocks, submit any buffers 1032e0e851cfSChris Mason * that haven't already reached the disk. Try to write at least 256 1033e0e851cfSChris Mason * log blocks. later on, we will only wait on blocks that correspond 1034e0e851cfSChris Mason * to this transaction, but while we're unplugging we might as well 1035e0e851cfSChris Mason * get a chunk of data on there. 10361da177e4SLinus Torvalds */ 10371da177e4SLinus Torvalds atomic_inc(&journal->j_async_throttle); 1038e0e851cfSChris Mason write_len = jl->j_len + 1; 1039e0e851cfSChris Mason if (write_len < 256) 1040e0e851cfSChris Mason write_len = 256; 1041e0e851cfSChris Mason for (i = 0 ; i < write_len ; i++) { 10421da177e4SLinus Torvalds bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + (jl->j_start + i) % 10431da177e4SLinus Torvalds SB_ONDISK_JOURNAL_SIZE(s); 10441da177e4SLinus Torvalds tbh = journal_find_get_block(s, bn); 1045e0e851cfSChris Mason if (tbh) { 10466e3647acSFrederic Weisbecker if (buffer_dirty(tbh)) { 10476e3647acSFrederic Weisbecker reiserfs_write_unlock(s); 1048e0e851cfSChris Mason ll_rw_block(WRITE, 1, &tbh); 10496e3647acSFrederic Weisbecker reiserfs_write_lock(s); 10506e3647acSFrederic Weisbecker } 10511da177e4SLinus Torvalds put_bh(tbh) ; 10521da177e4SLinus Torvalds } 1053e0e851cfSChris Mason } 10541da177e4SLinus Torvalds atomic_dec(&journal->j_async_throttle); 10551da177e4SLinus Torvalds 10561da177e4SLinus Torvalds for (i = 0; i < (jl->j_len + 1); i++) { 10571da177e4SLinus Torvalds bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + 10581da177e4SLinus Torvalds (jl->j_start + i) % SB_ONDISK_JOURNAL_SIZE(s); 10591da177e4SLinus Torvalds tbh = journal_find_get_block(s, bn); 10608ebc4232SFrederic Weisbecker 10618ebc4232SFrederic Weisbecker reiserfs_write_unlock(s); 10621da177e4SLinus Torvalds wait_on_buffer(tbh); 10638ebc4232SFrederic Weisbecker reiserfs_write_lock(s); 10641da177e4SLinus Torvalds // since we're using ll_rw_blk above, it might have skipped over 10651da177e4SLinus Torvalds // a locked buffer. Double check here 10661da177e4SLinus Torvalds // 10678ebc4232SFrederic Weisbecker /* redundant, sync_dirty_buffer() checks */ 10688ebc4232SFrederic Weisbecker if (buffer_dirty(tbh)) { 10698ebc4232SFrederic Weisbecker reiserfs_write_unlock(s); 10701da177e4SLinus Torvalds sync_dirty_buffer(tbh); 10718ebc4232SFrederic Weisbecker reiserfs_write_lock(s); 10728ebc4232SFrederic Weisbecker } 10731da177e4SLinus Torvalds if (unlikely(!buffer_uptodate(tbh))) { 10741da177e4SLinus Torvalds #ifdef CONFIG_REISERFS_CHECK 107545b03d5eSJeff Mahoney reiserfs_warning(s, "journal-601", 107645b03d5eSJeff Mahoney "buffer write failed"); 10771da177e4SLinus Torvalds #endif 10781da177e4SLinus Torvalds retval = -EIO; 10791da177e4SLinus Torvalds } 10801da177e4SLinus Torvalds put_bh(tbh); /* once for journal_find_get_block */ 10811da177e4SLinus Torvalds put_bh(tbh); /* once due to original getblk in do_journal_end */ 10821da177e4SLinus Torvalds atomic_dec(&(jl->j_commit_left)); 10831da177e4SLinus Torvalds } 10841da177e4SLinus Torvalds 10851da177e4SLinus Torvalds BUG_ON(atomic_read(&(jl->j_commit_left)) != 1); 10861da177e4SLinus Torvalds 10875d5e8156SJeff Mahoney /* If there was a write error in the journal - we can't commit 10885d5e8156SJeff Mahoney * this transaction - it will be invalid and, if successful, 1089beb7dd86SRobert P. J. Day * will just end up propagating the write error out to 10905d5e8156SJeff Mahoney * the file system. */ 10915d5e8156SJeff Mahoney if (likely(!retval && !reiserfs_is_journal_aborted (journal))) { 10921da177e4SLinus Torvalds if (buffer_dirty(jl->j_commit_bh)) 10931da177e4SLinus Torvalds BUG(); 10941da177e4SLinus Torvalds mark_buffer_dirty(jl->j_commit_bh) ; 10958ebc4232SFrederic Weisbecker reiserfs_write_unlock(s); 10967cd33ad2SChristoph Hellwig if (reiserfs_barrier_flush(s)) 10977cd33ad2SChristoph Hellwig __sync_dirty_buffer(jl->j_commit_bh, WRITE_FLUSH_FUA); 10987cd33ad2SChristoph Hellwig else 10991da177e4SLinus Torvalds sync_dirty_buffer(jl->j_commit_bh); 11008ebc4232SFrederic Weisbecker reiserfs_write_lock(s); 11015d5e8156SJeff Mahoney } 11021da177e4SLinus Torvalds 11031da177e4SLinus Torvalds /* If there was a write error in the journal - we can't commit this 11041da177e4SLinus Torvalds * transaction - it will be invalid and, if successful, will just end 1105beb7dd86SRobert P. J. Day * up propagating the write error out to the filesystem. */ 11061da177e4SLinus Torvalds if (unlikely(!buffer_uptodate(jl->j_commit_bh))) { 11071da177e4SLinus Torvalds #ifdef CONFIG_REISERFS_CHECK 110845b03d5eSJeff Mahoney reiserfs_warning(s, "journal-615", "buffer write failed"); 11091da177e4SLinus Torvalds #endif 11101da177e4SLinus Torvalds retval = -EIO; 11111da177e4SLinus Torvalds } 11121da177e4SLinus Torvalds bforget(jl->j_commit_bh); 11131da177e4SLinus Torvalds if (journal->j_last_commit_id != 0 && 11141da177e4SLinus Torvalds (jl->j_trans_id - journal->j_last_commit_id) != 1) { 111545b03d5eSJeff Mahoney reiserfs_warning(s, "clm-2200", "last commit %lu, current %lu", 1116bd4c625cSLinus Torvalds journal->j_last_commit_id, jl->j_trans_id); 11171da177e4SLinus Torvalds } 11181da177e4SLinus Torvalds journal->j_last_commit_id = jl->j_trans_id; 11191da177e4SLinus Torvalds 11201da177e4SLinus Torvalds /* now, every commit block is on the disk. It is safe to allow blocks freed during this transaction to be reallocated */ 11211da177e4SLinus Torvalds cleanup_freed_for_journal_list(s, jl); 11221da177e4SLinus Torvalds 11231da177e4SLinus Torvalds retval = retval ? retval : journal->j_errno; 11241da177e4SLinus Torvalds 11251da177e4SLinus Torvalds /* mark the metadata dirty */ 11261da177e4SLinus Torvalds if (!retval) 11271da177e4SLinus Torvalds dirty_one_transaction(s, jl); 11281da177e4SLinus Torvalds atomic_dec(&(jl->j_commit_left)); 11291da177e4SLinus Torvalds 11301da177e4SLinus Torvalds if (flushall) { 11311da177e4SLinus Torvalds atomic_set(&(jl->j_older_commits_done), 1); 11321da177e4SLinus Torvalds } 113390415deaSJeff Mahoney mutex_unlock(&jl->j_commit_mutex); 11341da177e4SLinus Torvalds put_jl: 11351da177e4SLinus Torvalds put_journal_list(s, jl); 11361da177e4SLinus Torvalds 11371da177e4SLinus Torvalds if (retval) 1138bd4c625cSLinus Torvalds reiserfs_abort(s, retval, "Journal write error in %s", 1139fbe5498bSHarvey Harrison __func__); 11401da177e4SLinus Torvalds return retval; 11411da177e4SLinus Torvalds } 11421da177e4SLinus Torvalds 11431da177e4SLinus Torvalds /* 11441da177e4SLinus Torvalds ** flush_journal_list frequently needs to find a newer transaction for a given block. This does that, or 11451da177e4SLinus Torvalds ** returns NULL if it can't find anything 11461da177e4SLinus Torvalds */ 1147bd4c625cSLinus Torvalds static struct reiserfs_journal_list *find_newer_jl_for_cn(struct 1148bd4c625cSLinus Torvalds reiserfs_journal_cnode 1149bd4c625cSLinus Torvalds *cn) 1150bd4c625cSLinus Torvalds { 11511da177e4SLinus Torvalds struct super_block *sb = cn->sb; 11521da177e4SLinus Torvalds b_blocknr_t blocknr = cn->blocknr; 11531da177e4SLinus Torvalds 11541da177e4SLinus Torvalds cn = cn->hprev; 11551da177e4SLinus Torvalds while (cn) { 11561da177e4SLinus Torvalds if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist) { 11571da177e4SLinus Torvalds return cn->jlist; 11581da177e4SLinus Torvalds } 11591da177e4SLinus Torvalds cn = cn->hprev; 11601da177e4SLinus Torvalds } 11611da177e4SLinus Torvalds return NULL; 11621da177e4SLinus Torvalds } 11631da177e4SLinus Torvalds 1164a3172027SChris Mason static int newer_jl_done(struct reiserfs_journal_cnode *cn) 1165a3172027SChris Mason { 1166a3172027SChris Mason struct super_block *sb = cn->sb; 1167a3172027SChris Mason b_blocknr_t blocknr = cn->blocknr; 1168a3172027SChris Mason 1169a3172027SChris Mason cn = cn->hprev; 1170a3172027SChris Mason while (cn) { 1171a3172027SChris Mason if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist && 1172a3172027SChris Mason atomic_read(&cn->jlist->j_commit_left) != 0) 1173a3172027SChris Mason return 0; 1174a3172027SChris Mason cn = cn->hprev; 1175a3172027SChris Mason } 1176a3172027SChris Mason return 1; 1177a3172027SChris Mason } 1178a3172027SChris Mason 1179bd4c625cSLinus Torvalds static void remove_journal_hash(struct super_block *, 1180bd4c625cSLinus Torvalds struct reiserfs_journal_cnode **, 1181bd4c625cSLinus Torvalds struct reiserfs_journal_list *, unsigned long, 1182bd4c625cSLinus Torvalds int); 11831da177e4SLinus Torvalds 11841da177e4SLinus Torvalds /* 11851da177e4SLinus Torvalds ** once all the real blocks have been flushed, it is safe to remove them from the 11861da177e4SLinus Torvalds ** journal list for this transaction. Aside from freeing the cnode, this also allows the 11871da177e4SLinus Torvalds ** block to be reallocated for data blocks if it had been deleted. 11881da177e4SLinus Torvalds */ 1189a9dd3643SJeff Mahoney static void remove_all_from_journal_list(struct super_block *sb, 1190bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl, 1191bd4c625cSLinus Torvalds int debug) 1192bd4c625cSLinus Torvalds { 1193a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 11941da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn, *last; 11951da177e4SLinus Torvalds cn = jl->j_realblock; 11961da177e4SLinus Torvalds 11971da177e4SLinus Torvalds /* which is better, to lock once around the whole loop, or 11981da177e4SLinus Torvalds ** to lock for each call to remove_journal_hash? 11991da177e4SLinus Torvalds */ 12001da177e4SLinus Torvalds while (cn) { 12011da177e4SLinus Torvalds if (cn->blocknr != 0) { 12021da177e4SLinus Torvalds if (debug) { 1203a9dd3643SJeff Mahoney reiserfs_warning(sb, "reiserfs-2201", 1204bd4c625cSLinus Torvalds "block %u, bh is %d, state %ld", 1205bd4c625cSLinus Torvalds cn->blocknr, cn->bh ? 1 : 0, 1206bd4c625cSLinus Torvalds cn->state); 12071da177e4SLinus Torvalds } 12081da177e4SLinus Torvalds cn->state = 0; 1209a9dd3643SJeff Mahoney remove_journal_hash(sb, journal->j_list_hash_table, 1210bd4c625cSLinus Torvalds jl, cn->blocknr, 1); 12111da177e4SLinus Torvalds } 12121da177e4SLinus Torvalds last = cn; 12131da177e4SLinus Torvalds cn = cn->next; 1214a9dd3643SJeff Mahoney free_cnode(sb, last); 12151da177e4SLinus Torvalds } 12161da177e4SLinus Torvalds jl->j_realblock = NULL; 12171da177e4SLinus Torvalds } 12181da177e4SLinus Torvalds 12191da177e4SLinus Torvalds /* 12201da177e4SLinus Torvalds ** if this timestamp is greater than the timestamp we wrote last to the header block, write it to the header block. 12211da177e4SLinus Torvalds ** once this is done, I can safely say the log area for this transaction won't ever be replayed, and I can start 12221da177e4SLinus Torvalds ** releasing blocks in this transaction for reuse as data blocks. 12231da177e4SLinus Torvalds ** called by flush_journal_list, before it calls remove_all_from_journal_list 12241da177e4SLinus Torvalds ** 12251da177e4SLinus Torvalds */ 1226a9dd3643SJeff Mahoney static int _update_journal_header_block(struct super_block *sb, 1227bd4c625cSLinus Torvalds unsigned long offset, 1228600ed416SJeff Mahoney unsigned int trans_id) 1229bd4c625cSLinus Torvalds { 12301da177e4SLinus Torvalds struct reiserfs_journal_header *jh; 1231a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 12321da177e4SLinus Torvalds 12331da177e4SLinus Torvalds if (reiserfs_is_journal_aborted(journal)) 12341da177e4SLinus Torvalds return -EIO; 12351da177e4SLinus Torvalds 12361da177e4SLinus Torvalds if (trans_id >= journal->j_last_flush_trans_id) { 12371da177e4SLinus Torvalds if (buffer_locked((journal->j_header_bh))) { 12388ebc4232SFrederic Weisbecker reiserfs_write_unlock(sb); 12391da177e4SLinus Torvalds wait_on_buffer((journal->j_header_bh)); 12408ebc4232SFrederic Weisbecker reiserfs_write_lock(sb); 12411da177e4SLinus Torvalds if (unlikely(!buffer_uptodate(journal->j_header_bh))) { 12421da177e4SLinus Torvalds #ifdef CONFIG_REISERFS_CHECK 1243a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-699", 124445b03d5eSJeff Mahoney "buffer write failed"); 12451da177e4SLinus Torvalds #endif 12461da177e4SLinus Torvalds return -EIO; 12471da177e4SLinus Torvalds } 12481da177e4SLinus Torvalds } 12491da177e4SLinus Torvalds journal->j_last_flush_trans_id = trans_id; 12501da177e4SLinus Torvalds journal->j_first_unflushed_offset = offset; 1251bd4c625cSLinus Torvalds jh = (struct reiserfs_journal_header *)(journal->j_header_bh-> 1252bd4c625cSLinus Torvalds b_data); 12531da177e4SLinus Torvalds jh->j_last_flush_trans_id = cpu_to_le32(trans_id); 12541da177e4SLinus Torvalds jh->j_first_unflushed_offset = cpu_to_le32(offset); 12551da177e4SLinus Torvalds jh->j_mount_id = cpu_to_le32(journal->j_mount_id); 12561da177e4SLinus Torvalds 12571da177e4SLinus Torvalds set_buffer_dirty(journal->j_header_bh); 12588ebc4232SFrederic Weisbecker reiserfs_write_unlock(sb); 12597cd33ad2SChristoph Hellwig 12607cd33ad2SChristoph Hellwig if (reiserfs_barrier_flush(sb)) 12617cd33ad2SChristoph Hellwig __sync_dirty_buffer(journal->j_header_bh, WRITE_FLUSH_FUA); 12627cd33ad2SChristoph Hellwig else 12631da177e4SLinus Torvalds sync_dirty_buffer(journal->j_header_bh); 12647cd33ad2SChristoph Hellwig 12658ebc4232SFrederic Weisbecker reiserfs_write_lock(sb); 12661da177e4SLinus Torvalds if (!buffer_uptodate(journal->j_header_bh)) { 1267a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-837", 126845b03d5eSJeff Mahoney "IO error during journal replay"); 12691da177e4SLinus Torvalds return -EIO; 12701da177e4SLinus Torvalds } 12711da177e4SLinus Torvalds } 12721da177e4SLinus Torvalds return 0; 12731da177e4SLinus Torvalds } 12741da177e4SLinus Torvalds 1275a9dd3643SJeff Mahoney static int update_journal_header_block(struct super_block *sb, 12761da177e4SLinus Torvalds unsigned long offset, 1277600ed416SJeff Mahoney unsigned int trans_id) 1278bd4c625cSLinus Torvalds { 1279a9dd3643SJeff Mahoney return _update_journal_header_block(sb, offset, trans_id); 12801da177e4SLinus Torvalds } 1281bd4c625cSLinus Torvalds 12821da177e4SLinus Torvalds /* 12831da177e4SLinus Torvalds ** flush any and all journal lists older than you are 12841da177e4SLinus Torvalds ** can only be called from flush_journal_list 12851da177e4SLinus Torvalds */ 1286a9dd3643SJeff Mahoney static int flush_older_journal_lists(struct super_block *sb, 12871da177e4SLinus Torvalds struct reiserfs_journal_list *jl) 12881da177e4SLinus Torvalds { 12891da177e4SLinus Torvalds struct list_head *entry; 12901da177e4SLinus Torvalds struct reiserfs_journal_list *other_jl; 1291a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 1292600ed416SJeff Mahoney unsigned int trans_id = jl->j_trans_id; 12931da177e4SLinus Torvalds 12941da177e4SLinus Torvalds /* we know we are the only ones flushing things, no extra race 12951da177e4SLinus Torvalds * protection is required. 12961da177e4SLinus Torvalds */ 12971da177e4SLinus Torvalds restart: 12981da177e4SLinus Torvalds entry = journal->j_journal_list.next; 12991da177e4SLinus Torvalds /* Did we wrap? */ 13001da177e4SLinus Torvalds if (entry == &journal->j_journal_list) 13011da177e4SLinus Torvalds return 0; 13021da177e4SLinus Torvalds other_jl = JOURNAL_LIST_ENTRY(entry); 13031da177e4SLinus Torvalds if (other_jl->j_trans_id < trans_id) { 13041da177e4SLinus Torvalds BUG_ON(other_jl->j_refcount <= 0); 13051da177e4SLinus Torvalds /* do not flush all */ 1306a9dd3643SJeff Mahoney flush_journal_list(sb, other_jl, 0); 13071da177e4SLinus Torvalds 13081da177e4SLinus Torvalds /* other_jl is now deleted from the list */ 13091da177e4SLinus Torvalds goto restart; 13101da177e4SLinus Torvalds } 13111da177e4SLinus Torvalds return 0; 13121da177e4SLinus Torvalds } 13131da177e4SLinus Torvalds 13141da177e4SLinus Torvalds static void del_from_work_list(struct super_block *s, 1315bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl) 1316bd4c625cSLinus Torvalds { 13171da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 13181da177e4SLinus Torvalds if (!list_empty(&jl->j_working_list)) { 13191da177e4SLinus Torvalds list_del_init(&jl->j_working_list); 13201da177e4SLinus Torvalds journal->j_num_work_lists--; 13211da177e4SLinus Torvalds } 13221da177e4SLinus Torvalds } 13231da177e4SLinus Torvalds 13241da177e4SLinus Torvalds /* flush a journal list, both commit and real blocks 13251da177e4SLinus Torvalds ** 13261da177e4SLinus Torvalds ** always set flushall to 1, unless you are calling from inside 13271da177e4SLinus Torvalds ** flush_journal_list 13281da177e4SLinus Torvalds ** 13291da177e4SLinus Torvalds ** IMPORTANT. This can only be called while there are no journal writers, 13301da177e4SLinus Torvalds ** and the journal is locked. That means it can only be called from 13311da177e4SLinus Torvalds ** do_journal_end, or by journal_release 13321da177e4SLinus Torvalds */ 13331da177e4SLinus Torvalds static int flush_journal_list(struct super_block *s, 1334bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl, int flushall) 1335bd4c625cSLinus Torvalds { 13361da177e4SLinus Torvalds struct reiserfs_journal_list *pjl; 13371da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn, *last; 13381da177e4SLinus Torvalds int count; 13391da177e4SLinus Torvalds int was_jwait = 0; 13401da177e4SLinus Torvalds int was_dirty = 0; 13411da177e4SLinus Torvalds struct buffer_head *saved_bh; 13421da177e4SLinus Torvalds unsigned long j_len_saved = jl->j_len; 13431da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 13441da177e4SLinus Torvalds int err = 0; 13451da177e4SLinus Torvalds 13461da177e4SLinus Torvalds BUG_ON(j_len_saved <= 0); 13471da177e4SLinus Torvalds 13481da177e4SLinus Torvalds if (atomic_read(&journal->j_wcount) != 0) { 134945b03d5eSJeff Mahoney reiserfs_warning(s, "clm-2048", "called with wcount %d", 13501da177e4SLinus Torvalds atomic_read(&journal->j_wcount)); 13511da177e4SLinus Torvalds } 13521da177e4SLinus Torvalds BUG_ON(jl->j_trans_id == 0); 13531da177e4SLinus Torvalds 13541da177e4SLinus Torvalds /* if flushall == 0, the lock is already held */ 13551da177e4SLinus Torvalds if (flushall) { 13568ebc4232SFrederic Weisbecker reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s); 1357afe70259SJeff Mahoney } else if (mutex_trylock(&journal->j_flush_mutex)) { 13581da177e4SLinus Torvalds BUG(); 13591da177e4SLinus Torvalds } 13601da177e4SLinus Torvalds 13611da177e4SLinus Torvalds count = 0; 13621da177e4SLinus Torvalds if (j_len_saved > journal->j_trans_max) { 1363c3a9c210SJeff Mahoney reiserfs_panic(s, "journal-715", "length is %lu, trans id %lu", 1364bd4c625cSLinus Torvalds j_len_saved, jl->j_trans_id); 13651da177e4SLinus Torvalds return 0; 13661da177e4SLinus Torvalds } 13671da177e4SLinus Torvalds 13681da177e4SLinus Torvalds /* if all the work is already done, get out of here */ 13691da177e4SLinus Torvalds if (atomic_read(&(jl->j_nonzerolen)) <= 0 && 13701da177e4SLinus Torvalds atomic_read(&(jl->j_commit_left)) <= 0) { 13711da177e4SLinus Torvalds goto flush_older_and_return; 13721da177e4SLinus Torvalds } 13731da177e4SLinus Torvalds 13741da177e4SLinus Torvalds /* start by putting the commit list on disk. This will also flush 13751da177e4SLinus Torvalds ** the commit lists of any olders transactions 13761da177e4SLinus Torvalds */ 13771da177e4SLinus Torvalds flush_commit_list(s, jl, 1); 13781da177e4SLinus Torvalds 1379bd4c625cSLinus Torvalds if (!(jl->j_state & LIST_DIRTY) 1380bd4c625cSLinus Torvalds && !reiserfs_is_journal_aborted(journal)) 13811da177e4SLinus Torvalds BUG(); 13821da177e4SLinus Torvalds 13831da177e4SLinus Torvalds /* are we done now? */ 13841da177e4SLinus Torvalds if (atomic_read(&(jl->j_nonzerolen)) <= 0 && 13851da177e4SLinus Torvalds atomic_read(&(jl->j_commit_left)) <= 0) { 13861da177e4SLinus Torvalds goto flush_older_and_return; 13871da177e4SLinus Torvalds } 13881da177e4SLinus Torvalds 13891da177e4SLinus Torvalds /* loop through each cnode, see if we need to write it, 13901da177e4SLinus Torvalds ** or wait on a more recent transaction, or just ignore it 13911da177e4SLinus Torvalds */ 13921da177e4SLinus Torvalds if (atomic_read(&(journal->j_wcount)) != 0) { 1393c3a9c210SJeff Mahoney reiserfs_panic(s, "journal-844", "journal list is flushing, " 1394c3a9c210SJeff Mahoney "wcount is not 0"); 13951da177e4SLinus Torvalds } 13961da177e4SLinus Torvalds cn = jl->j_realblock; 13971da177e4SLinus Torvalds while (cn) { 13981da177e4SLinus Torvalds was_jwait = 0; 13991da177e4SLinus Torvalds was_dirty = 0; 14001da177e4SLinus Torvalds saved_bh = NULL; 14011da177e4SLinus Torvalds /* blocknr of 0 is no longer in the hash, ignore it */ 14021da177e4SLinus Torvalds if (cn->blocknr == 0) { 14031da177e4SLinus Torvalds goto free_cnode; 14041da177e4SLinus Torvalds } 14051da177e4SLinus Torvalds 14061da177e4SLinus Torvalds /* This transaction failed commit. Don't write out to the disk */ 14071da177e4SLinus Torvalds if (!(jl->j_state & LIST_DIRTY)) 14081da177e4SLinus Torvalds goto free_cnode; 14091da177e4SLinus Torvalds 14101da177e4SLinus Torvalds pjl = find_newer_jl_for_cn(cn); 14111da177e4SLinus Torvalds /* the order is important here. We check pjl to make sure we 14121da177e4SLinus Torvalds ** don't clear BH_JDirty_wait if we aren't the one writing this 14131da177e4SLinus Torvalds ** block to disk 14141da177e4SLinus Torvalds */ 14151da177e4SLinus Torvalds if (!pjl && cn->bh) { 14161da177e4SLinus Torvalds saved_bh = cn->bh; 14171da177e4SLinus Torvalds 14181da177e4SLinus Torvalds /* we do this to make sure nobody releases the buffer while 14191da177e4SLinus Torvalds ** we are working with it 14201da177e4SLinus Torvalds */ 14211da177e4SLinus Torvalds get_bh(saved_bh); 14221da177e4SLinus Torvalds 14231da177e4SLinus Torvalds if (buffer_journal_dirty(saved_bh)) { 14241da177e4SLinus Torvalds BUG_ON(!can_dirty(cn)); 14251da177e4SLinus Torvalds was_jwait = 1; 14261da177e4SLinus Torvalds was_dirty = 1; 14271da177e4SLinus Torvalds } else if (can_dirty(cn)) { 14281da177e4SLinus Torvalds /* everything with !pjl && jwait should be writable */ 14291da177e4SLinus Torvalds BUG(); 14301da177e4SLinus Torvalds } 14311da177e4SLinus Torvalds } 14321da177e4SLinus Torvalds 14331da177e4SLinus Torvalds /* if someone has this block in a newer transaction, just make 14340779bf2dSMatt LaPlante ** sure they are committed, and don't try writing it to disk 14351da177e4SLinus Torvalds */ 14361da177e4SLinus Torvalds if (pjl) { 14371da177e4SLinus Torvalds if (atomic_read(&pjl->j_commit_left)) 14381da177e4SLinus Torvalds flush_commit_list(s, pjl, 1); 14391da177e4SLinus Torvalds goto free_cnode; 14401da177e4SLinus Torvalds } 14411da177e4SLinus Torvalds 14421da177e4SLinus Torvalds /* bh == NULL when the block got to disk on its own, OR, 14431da177e4SLinus Torvalds ** the block got freed in a future transaction 14441da177e4SLinus Torvalds */ 14451da177e4SLinus Torvalds if (saved_bh == NULL) { 14461da177e4SLinus Torvalds goto free_cnode; 14471da177e4SLinus Torvalds } 14481da177e4SLinus Torvalds 14491da177e4SLinus Torvalds /* this should never happen. kupdate_one_transaction has this list 14501da177e4SLinus Torvalds ** locked while it works, so we should never see a buffer here that 14511da177e4SLinus Torvalds ** is not marked JDirty_wait 14521da177e4SLinus Torvalds */ 14531da177e4SLinus Torvalds if ((!was_jwait) && !buffer_locked(saved_bh)) { 145445b03d5eSJeff Mahoney reiserfs_warning(s, "journal-813", 145545b03d5eSJeff Mahoney "BAD! buffer %llu %cdirty %cjwait, " 14561da177e4SLinus Torvalds "not in a newer tranasction", 1457bd4c625cSLinus Torvalds (unsigned long long)saved_bh-> 1458bd4c625cSLinus Torvalds b_blocknr, was_dirty ? ' ' : '!', 1459bd4c625cSLinus Torvalds was_jwait ? ' ' : '!'); 14601da177e4SLinus Torvalds } 14611da177e4SLinus Torvalds if (was_dirty) { 14621da177e4SLinus Torvalds /* we inc again because saved_bh gets decremented at free_cnode */ 14631da177e4SLinus Torvalds get_bh(saved_bh); 14641da177e4SLinus Torvalds set_bit(BLOCK_NEEDS_FLUSH, &cn->state); 14651da177e4SLinus Torvalds lock_buffer(saved_bh); 14661da177e4SLinus Torvalds BUG_ON(cn->blocknr != saved_bh->b_blocknr); 14671da177e4SLinus Torvalds if (buffer_dirty(saved_bh)) 14681da177e4SLinus Torvalds submit_logged_buffer(saved_bh); 14691da177e4SLinus Torvalds else 14701da177e4SLinus Torvalds unlock_buffer(saved_bh); 14711da177e4SLinus Torvalds count++; 14721da177e4SLinus Torvalds } else { 147345b03d5eSJeff Mahoney reiserfs_warning(s, "clm-2082", 147445b03d5eSJeff Mahoney "Unable to flush buffer %llu in %s", 1475bd4c625cSLinus Torvalds (unsigned long long)saved_bh-> 1476fbe5498bSHarvey Harrison b_blocknr, __func__); 14771da177e4SLinus Torvalds } 14781da177e4SLinus Torvalds free_cnode: 14791da177e4SLinus Torvalds last = cn; 14801da177e4SLinus Torvalds cn = cn->next; 14811da177e4SLinus Torvalds if (saved_bh) { 14821da177e4SLinus Torvalds /* we incremented this to keep others from taking the buffer head away */ 14831da177e4SLinus Torvalds put_bh(saved_bh); 14841da177e4SLinus Torvalds if (atomic_read(&(saved_bh->b_count)) < 0) { 148545b03d5eSJeff Mahoney reiserfs_warning(s, "journal-945", 148645b03d5eSJeff Mahoney "saved_bh->b_count < 0"); 14871da177e4SLinus Torvalds } 14881da177e4SLinus Torvalds } 14891da177e4SLinus Torvalds } 14901da177e4SLinus Torvalds if (count > 0) { 14911da177e4SLinus Torvalds cn = jl->j_realblock; 14921da177e4SLinus Torvalds while (cn) { 14931da177e4SLinus Torvalds if (test_bit(BLOCK_NEEDS_FLUSH, &cn->state)) { 14941da177e4SLinus Torvalds if (!cn->bh) { 1495c3a9c210SJeff Mahoney reiserfs_panic(s, "journal-1011", 1496c3a9c210SJeff Mahoney "cn->bh is NULL"); 14971da177e4SLinus Torvalds } 14988ebc4232SFrederic Weisbecker 14998ebc4232SFrederic Weisbecker reiserfs_write_unlock(s); 15001da177e4SLinus Torvalds wait_on_buffer(cn->bh); 15018ebc4232SFrederic Weisbecker reiserfs_write_lock(s); 15028ebc4232SFrederic Weisbecker 15031da177e4SLinus Torvalds if (!cn->bh) { 1504c3a9c210SJeff Mahoney reiserfs_panic(s, "journal-1012", 1505c3a9c210SJeff Mahoney "cn->bh is NULL"); 15061da177e4SLinus Torvalds } 15071da177e4SLinus Torvalds if (unlikely(!buffer_uptodate(cn->bh))) { 15081da177e4SLinus Torvalds #ifdef CONFIG_REISERFS_CHECK 150945b03d5eSJeff Mahoney reiserfs_warning(s, "journal-949", 151045b03d5eSJeff Mahoney "buffer write failed"); 15111da177e4SLinus Torvalds #endif 15121da177e4SLinus Torvalds err = -EIO; 15131da177e4SLinus Torvalds } 15141da177e4SLinus Torvalds /* note, we must clear the JDirty_wait bit after the up to date 15151da177e4SLinus Torvalds ** check, otherwise we race against our flushpage routine 15161da177e4SLinus Torvalds */ 1517bd4c625cSLinus Torvalds BUG_ON(!test_clear_buffer_journal_dirty 1518bd4c625cSLinus Torvalds (cn->bh)); 15191da177e4SLinus Torvalds 1520398c95bdSChris Mason /* drop one ref for us */ 15211da177e4SLinus Torvalds put_bh(cn->bh); 1522398c95bdSChris Mason /* drop one ref for journal_mark_dirty */ 1523398c95bdSChris Mason release_buffer_page(cn->bh); 15241da177e4SLinus Torvalds } 15251da177e4SLinus Torvalds cn = cn->next; 15261da177e4SLinus Torvalds } 15271da177e4SLinus Torvalds } 15281da177e4SLinus Torvalds 15291da177e4SLinus Torvalds if (err) 1530bd4c625cSLinus Torvalds reiserfs_abort(s, -EIO, 1531bd4c625cSLinus Torvalds "Write error while pushing transaction to disk in %s", 1532fbe5498bSHarvey Harrison __func__); 15331da177e4SLinus Torvalds flush_older_and_return: 15341da177e4SLinus Torvalds 15351da177e4SLinus Torvalds /* before we can update the journal header block, we _must_ flush all 15361da177e4SLinus Torvalds ** real blocks from all older transactions to disk. This is because 15371da177e4SLinus Torvalds ** once the header block is updated, this transaction will not be 15381da177e4SLinus Torvalds ** replayed after a crash 15391da177e4SLinus Torvalds */ 15401da177e4SLinus Torvalds if (flushall) { 15411da177e4SLinus Torvalds flush_older_journal_lists(s, jl); 15421da177e4SLinus Torvalds } 15431da177e4SLinus Torvalds 15441da177e4SLinus Torvalds err = journal->j_errno; 15451da177e4SLinus Torvalds /* before we can remove everything from the hash tables for this 15461da177e4SLinus Torvalds ** transaction, we must make sure it can never be replayed 15471da177e4SLinus Torvalds ** 15481da177e4SLinus Torvalds ** since we are only called from do_journal_end, we know for sure there 15491da177e4SLinus Torvalds ** are no allocations going on while we are flushing journal lists. So, 15501da177e4SLinus Torvalds ** we only need to update the journal header block for the last list 15511da177e4SLinus Torvalds ** being flushed 15521da177e4SLinus Torvalds */ 15531da177e4SLinus Torvalds if (!err && flushall) { 1554bd4c625cSLinus Torvalds err = 1555bd4c625cSLinus Torvalds update_journal_header_block(s, 1556bd4c625cSLinus Torvalds (jl->j_start + jl->j_len + 1557bd4c625cSLinus Torvalds 2) % SB_ONDISK_JOURNAL_SIZE(s), 1558bd4c625cSLinus Torvalds jl->j_trans_id); 15591da177e4SLinus Torvalds if (err) 1560bd4c625cSLinus Torvalds reiserfs_abort(s, -EIO, 1561bd4c625cSLinus Torvalds "Write error while updating journal header in %s", 1562fbe5498bSHarvey Harrison __func__); 15631da177e4SLinus Torvalds } 15641da177e4SLinus Torvalds remove_all_from_journal_list(s, jl, 0); 15651da177e4SLinus Torvalds list_del_init(&jl->j_list); 15661da177e4SLinus Torvalds journal->j_num_lists--; 15671da177e4SLinus Torvalds del_from_work_list(s, jl); 15681da177e4SLinus Torvalds 15691da177e4SLinus Torvalds if (journal->j_last_flush_id != 0 && 15701da177e4SLinus Torvalds (jl->j_trans_id - journal->j_last_flush_id) != 1) { 157145b03d5eSJeff Mahoney reiserfs_warning(s, "clm-2201", "last flush %lu, current %lu", 1572bd4c625cSLinus Torvalds journal->j_last_flush_id, jl->j_trans_id); 15731da177e4SLinus Torvalds } 15741da177e4SLinus Torvalds journal->j_last_flush_id = jl->j_trans_id; 15751da177e4SLinus Torvalds 15761da177e4SLinus Torvalds /* not strictly required since we are freeing the list, but it should 15771da177e4SLinus Torvalds * help find code using dead lists later on 15781da177e4SLinus Torvalds */ 15791da177e4SLinus Torvalds jl->j_len = 0; 15801da177e4SLinus Torvalds atomic_set(&(jl->j_nonzerolen), 0); 15811da177e4SLinus Torvalds jl->j_start = 0; 15821da177e4SLinus Torvalds jl->j_realblock = NULL; 15831da177e4SLinus Torvalds jl->j_commit_bh = NULL; 15841da177e4SLinus Torvalds jl->j_trans_id = 0; 15851da177e4SLinus Torvalds jl->j_state = 0; 15861da177e4SLinus Torvalds put_journal_list(s, jl); 15871da177e4SLinus Torvalds if (flushall) 1588afe70259SJeff Mahoney mutex_unlock(&journal->j_flush_mutex); 15891da177e4SLinus Torvalds return err; 15901da177e4SLinus Torvalds } 15911da177e4SLinus Torvalds 1592a3172027SChris Mason static int test_transaction(struct super_block *s, 1593a3172027SChris Mason struct reiserfs_journal_list *jl) 1594a3172027SChris Mason { 1595a3172027SChris Mason struct reiserfs_journal_cnode *cn; 1596a3172027SChris Mason 1597a3172027SChris Mason if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) 1598a3172027SChris Mason return 1; 1599a3172027SChris Mason 1600a3172027SChris Mason cn = jl->j_realblock; 1601a3172027SChris Mason while (cn) { 1602a3172027SChris Mason /* if the blocknr == 0, this has been cleared from the hash, 1603a3172027SChris Mason ** skip it 1604a3172027SChris Mason */ 1605a3172027SChris Mason if (cn->blocknr == 0) { 1606a3172027SChris Mason goto next; 1607a3172027SChris Mason } 1608a3172027SChris Mason if (cn->bh && !newer_jl_done(cn)) 1609a3172027SChris Mason return 0; 1610a3172027SChris Mason next: 1611a3172027SChris Mason cn = cn->next; 1612a3172027SChris Mason cond_resched(); 1613a3172027SChris Mason } 1614a3172027SChris Mason return 0; 1615a3172027SChris Mason } 1616a3172027SChris Mason 16171da177e4SLinus Torvalds static int write_one_transaction(struct super_block *s, 16181da177e4SLinus Torvalds struct reiserfs_journal_list *jl, 16191da177e4SLinus Torvalds struct buffer_chunk *chunk) 16201da177e4SLinus Torvalds { 16211da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 16221da177e4SLinus Torvalds int ret = 0; 16231da177e4SLinus Torvalds 16241da177e4SLinus Torvalds jl->j_state |= LIST_TOUCHED; 16251da177e4SLinus Torvalds del_from_work_list(s, jl); 16261da177e4SLinus Torvalds if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) { 16271da177e4SLinus Torvalds return 0; 16281da177e4SLinus Torvalds } 16291da177e4SLinus Torvalds 16301da177e4SLinus Torvalds cn = jl->j_realblock; 16311da177e4SLinus Torvalds while (cn) { 16321da177e4SLinus Torvalds /* if the blocknr == 0, this has been cleared from the hash, 16331da177e4SLinus Torvalds ** skip it 16341da177e4SLinus Torvalds */ 16351da177e4SLinus Torvalds if (cn->blocknr == 0) { 16361da177e4SLinus Torvalds goto next; 16371da177e4SLinus Torvalds } 16381da177e4SLinus Torvalds if (cn->bh && can_dirty(cn) && buffer_dirty(cn->bh)) { 16391da177e4SLinus Torvalds struct buffer_head *tmp_bh; 16401da177e4SLinus Torvalds /* we can race against journal_mark_freed when we try 16411da177e4SLinus Torvalds * to lock_buffer(cn->bh), so we have to inc the buffer 16421da177e4SLinus Torvalds * count, and recheck things after locking 16431da177e4SLinus Torvalds */ 16441da177e4SLinus Torvalds tmp_bh = cn->bh; 16451da177e4SLinus Torvalds get_bh(tmp_bh); 16461da177e4SLinus Torvalds lock_buffer(tmp_bh); 16471da177e4SLinus Torvalds if (cn->bh && can_dirty(cn) && buffer_dirty(tmp_bh)) { 16481da177e4SLinus Torvalds if (!buffer_journal_dirty(tmp_bh) || 16491da177e4SLinus Torvalds buffer_journal_prepared(tmp_bh)) 16501da177e4SLinus Torvalds BUG(); 16511da177e4SLinus Torvalds add_to_chunk(chunk, tmp_bh, NULL, write_chunk); 16521da177e4SLinus Torvalds ret++; 16531da177e4SLinus Torvalds } else { 16541da177e4SLinus Torvalds /* note, cn->bh might be null now */ 16551da177e4SLinus Torvalds unlock_buffer(tmp_bh); 16561da177e4SLinus Torvalds } 16571da177e4SLinus Torvalds put_bh(tmp_bh); 16581da177e4SLinus Torvalds } 16591da177e4SLinus Torvalds next: 16601da177e4SLinus Torvalds cn = cn->next; 16611da177e4SLinus Torvalds cond_resched(); 16621da177e4SLinus Torvalds } 16631da177e4SLinus Torvalds return ret; 16641da177e4SLinus Torvalds } 16651da177e4SLinus Torvalds 16661da177e4SLinus Torvalds /* used by flush_commit_list */ 16671da177e4SLinus Torvalds static int dirty_one_transaction(struct super_block *s, 16681da177e4SLinus Torvalds struct reiserfs_journal_list *jl) 16691da177e4SLinus Torvalds { 16701da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 16711da177e4SLinus Torvalds struct reiserfs_journal_list *pjl; 16721da177e4SLinus Torvalds int ret = 0; 16731da177e4SLinus Torvalds 16741da177e4SLinus Torvalds jl->j_state |= LIST_DIRTY; 16751da177e4SLinus Torvalds cn = jl->j_realblock; 16761da177e4SLinus Torvalds while (cn) { 16771da177e4SLinus Torvalds /* look for a more recent transaction that logged this 16781da177e4SLinus Torvalds ** buffer. Only the most recent transaction with a buffer in 16791da177e4SLinus Torvalds ** it is allowed to send that buffer to disk 16801da177e4SLinus Torvalds */ 16811da177e4SLinus Torvalds pjl = find_newer_jl_for_cn(cn); 1682bd4c625cSLinus Torvalds if (!pjl && cn->blocknr && cn->bh 1683bd4c625cSLinus Torvalds && buffer_journal_dirty(cn->bh)) { 16841da177e4SLinus Torvalds BUG_ON(!can_dirty(cn)); 16851da177e4SLinus Torvalds /* if the buffer is prepared, it will either be logged 16861da177e4SLinus Torvalds * or restored. If restored, we need to make sure 16871da177e4SLinus Torvalds * it actually gets marked dirty 16881da177e4SLinus Torvalds */ 16891da177e4SLinus Torvalds clear_buffer_journal_new(cn->bh); 16901da177e4SLinus Torvalds if (buffer_journal_prepared(cn->bh)) { 16911da177e4SLinus Torvalds set_buffer_journal_restore_dirty(cn->bh); 16921da177e4SLinus Torvalds } else { 16931da177e4SLinus Torvalds set_buffer_journal_test(cn->bh); 16941da177e4SLinus Torvalds mark_buffer_dirty(cn->bh); 16951da177e4SLinus Torvalds } 16961da177e4SLinus Torvalds } 16971da177e4SLinus Torvalds cn = cn->next; 16981da177e4SLinus Torvalds } 16991da177e4SLinus Torvalds return ret; 17001da177e4SLinus Torvalds } 17011da177e4SLinus Torvalds 17021da177e4SLinus Torvalds static int kupdate_transactions(struct super_block *s, 17031da177e4SLinus Torvalds struct reiserfs_journal_list *jl, 17041da177e4SLinus Torvalds struct reiserfs_journal_list **next_jl, 1705600ed416SJeff Mahoney unsigned int *next_trans_id, 1706bd4c625cSLinus Torvalds int num_blocks, int num_trans) 1707bd4c625cSLinus Torvalds { 17081da177e4SLinus Torvalds int ret = 0; 17091da177e4SLinus Torvalds int written = 0; 17101da177e4SLinus Torvalds int transactions_flushed = 0; 1711600ed416SJeff Mahoney unsigned int orig_trans_id = jl->j_trans_id; 17121da177e4SLinus Torvalds struct buffer_chunk chunk; 17131da177e4SLinus Torvalds struct list_head *entry; 17141da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 17151da177e4SLinus Torvalds chunk.nr = 0; 17161da177e4SLinus Torvalds 1717a412f9efSFrederic Weisbecker reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s); 17181da177e4SLinus Torvalds if (!journal_list_still_alive(s, orig_trans_id)) { 17191da177e4SLinus Torvalds goto done; 17201da177e4SLinus Torvalds } 17211da177e4SLinus Torvalds 1722afe70259SJeff Mahoney /* we've got j_flush_mutex held, nobody is going to delete any 17231da177e4SLinus Torvalds * of these lists out from underneath us 17241da177e4SLinus Torvalds */ 17251da177e4SLinus Torvalds while ((num_trans && transactions_flushed < num_trans) || 17261da177e4SLinus Torvalds (!num_trans && written < num_blocks)) { 17271da177e4SLinus Torvalds 17281da177e4SLinus Torvalds if (jl->j_len == 0 || (jl->j_state & LIST_TOUCHED) || 1729bd4c625cSLinus Torvalds atomic_read(&jl->j_commit_left) 1730bd4c625cSLinus Torvalds || !(jl->j_state & LIST_DIRTY)) { 17311da177e4SLinus Torvalds del_from_work_list(s, jl); 17321da177e4SLinus Torvalds break; 17331da177e4SLinus Torvalds } 17341da177e4SLinus Torvalds ret = write_one_transaction(s, jl, &chunk); 17351da177e4SLinus Torvalds 17361da177e4SLinus Torvalds if (ret < 0) 17371da177e4SLinus Torvalds goto done; 17381da177e4SLinus Torvalds transactions_flushed++; 17391da177e4SLinus Torvalds written += ret; 17401da177e4SLinus Torvalds entry = jl->j_list.next; 17411da177e4SLinus Torvalds 17421da177e4SLinus Torvalds /* did we wrap? */ 17431da177e4SLinus Torvalds if (entry == &journal->j_journal_list) { 17441da177e4SLinus Torvalds break; 17451da177e4SLinus Torvalds } 17461da177e4SLinus Torvalds jl = JOURNAL_LIST_ENTRY(entry); 17471da177e4SLinus Torvalds 17481da177e4SLinus Torvalds /* don't bother with older transactions */ 17491da177e4SLinus Torvalds if (jl->j_trans_id <= orig_trans_id) 17501da177e4SLinus Torvalds break; 17511da177e4SLinus Torvalds } 17521da177e4SLinus Torvalds if (chunk.nr) { 17531da177e4SLinus Torvalds write_chunk(&chunk); 17541da177e4SLinus Torvalds } 17551da177e4SLinus Torvalds 17561da177e4SLinus Torvalds done: 1757afe70259SJeff Mahoney mutex_unlock(&journal->j_flush_mutex); 17581da177e4SLinus Torvalds return ret; 17591da177e4SLinus Torvalds } 17601da177e4SLinus Torvalds 17611da177e4SLinus Torvalds /* for o_sync and fsync heavy applications, they tend to use 17621da177e4SLinus Torvalds ** all the journa list slots with tiny transactions. These 17631da177e4SLinus Torvalds ** trigger lots and lots of calls to update the header block, which 17641da177e4SLinus Torvalds ** adds seeks and slows things down. 17651da177e4SLinus Torvalds ** 17661da177e4SLinus Torvalds ** This function tries to clear out a large chunk of the journal lists 17671da177e4SLinus Torvalds ** at once, which makes everything faster since only the newest journal 17681da177e4SLinus Torvalds ** list updates the header block 17691da177e4SLinus Torvalds */ 17701da177e4SLinus Torvalds static int flush_used_journal_lists(struct super_block *s, 1771bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl) 1772bd4c625cSLinus Torvalds { 17731da177e4SLinus Torvalds unsigned long len = 0; 17741da177e4SLinus Torvalds unsigned long cur_len; 17751da177e4SLinus Torvalds int ret; 17761da177e4SLinus Torvalds int i; 17771da177e4SLinus Torvalds int limit = 256; 17781da177e4SLinus Torvalds struct reiserfs_journal_list *tjl; 17791da177e4SLinus Torvalds struct reiserfs_journal_list *flush_jl; 1780600ed416SJeff Mahoney unsigned int trans_id; 17811da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 17821da177e4SLinus Torvalds 17831da177e4SLinus Torvalds flush_jl = tjl = jl; 17841da177e4SLinus Torvalds 17851da177e4SLinus Torvalds /* in data logging mode, try harder to flush a lot of blocks */ 17861da177e4SLinus Torvalds if (reiserfs_data_log(s)) 17871da177e4SLinus Torvalds limit = 1024; 17881da177e4SLinus Torvalds /* flush for 256 transactions or limit blocks, whichever comes first */ 17891da177e4SLinus Torvalds for (i = 0; i < 256 && len < limit; i++) { 17901da177e4SLinus Torvalds if (atomic_read(&tjl->j_commit_left) || 17911da177e4SLinus Torvalds tjl->j_trans_id < jl->j_trans_id) { 17921da177e4SLinus Torvalds break; 17931da177e4SLinus Torvalds } 17941da177e4SLinus Torvalds cur_len = atomic_read(&tjl->j_nonzerolen); 17951da177e4SLinus Torvalds if (cur_len > 0) { 17961da177e4SLinus Torvalds tjl->j_state &= ~LIST_TOUCHED; 17971da177e4SLinus Torvalds } 17981da177e4SLinus Torvalds len += cur_len; 17991da177e4SLinus Torvalds flush_jl = tjl; 18001da177e4SLinus Torvalds if (tjl->j_list.next == &journal->j_journal_list) 18011da177e4SLinus Torvalds break; 18021da177e4SLinus Torvalds tjl = JOURNAL_LIST_ENTRY(tjl->j_list.next); 18031da177e4SLinus Torvalds } 18041da177e4SLinus Torvalds /* try to find a group of blocks we can flush across all the 18051da177e4SLinus Torvalds ** transactions, but only bother if we've actually spanned 18061da177e4SLinus Torvalds ** across multiple lists 18071da177e4SLinus Torvalds */ 18081da177e4SLinus Torvalds if (flush_jl != jl) { 18091da177e4SLinus Torvalds ret = kupdate_transactions(s, jl, &tjl, &trans_id, len, i); 18101da177e4SLinus Torvalds } 18111da177e4SLinus Torvalds flush_journal_list(s, flush_jl, 1); 18121da177e4SLinus Torvalds return 0; 18131da177e4SLinus Torvalds } 18141da177e4SLinus Torvalds 18151da177e4SLinus Torvalds /* 18161da177e4SLinus Torvalds ** removes any nodes in table with name block and dev as bh. 18171da177e4SLinus Torvalds ** only touchs the hnext and hprev pointers. 18181da177e4SLinus Torvalds */ 18191da177e4SLinus Torvalds void remove_journal_hash(struct super_block *sb, 18201da177e4SLinus Torvalds struct reiserfs_journal_cnode **table, 18211da177e4SLinus Torvalds struct reiserfs_journal_list *jl, 18221da177e4SLinus Torvalds unsigned long block, int remove_freed) 18231da177e4SLinus Torvalds { 18241da177e4SLinus Torvalds struct reiserfs_journal_cnode *cur; 18251da177e4SLinus Torvalds struct reiserfs_journal_cnode **head; 18261da177e4SLinus Torvalds 18271da177e4SLinus Torvalds head = &(journal_hash(table, sb, block)); 18281da177e4SLinus Torvalds if (!head) { 18291da177e4SLinus Torvalds return; 18301da177e4SLinus Torvalds } 18311da177e4SLinus Torvalds cur = *head; 18321da177e4SLinus Torvalds while (cur) { 1833bd4c625cSLinus Torvalds if (cur->blocknr == block && cur->sb == sb 1834bd4c625cSLinus Torvalds && (jl == NULL || jl == cur->jlist) 1835bd4c625cSLinus Torvalds && (!test_bit(BLOCK_FREED, &cur->state) || remove_freed)) { 18361da177e4SLinus Torvalds if (cur->hnext) { 18371da177e4SLinus Torvalds cur->hnext->hprev = cur->hprev; 18381da177e4SLinus Torvalds } 18391da177e4SLinus Torvalds if (cur->hprev) { 18401da177e4SLinus Torvalds cur->hprev->hnext = cur->hnext; 18411da177e4SLinus Torvalds } else { 18421da177e4SLinus Torvalds *head = cur->hnext; 18431da177e4SLinus Torvalds } 18441da177e4SLinus Torvalds cur->blocknr = 0; 18451da177e4SLinus Torvalds cur->sb = NULL; 18461da177e4SLinus Torvalds cur->state = 0; 18471da177e4SLinus Torvalds if (cur->bh && cur->jlist) /* anybody who clears the cur->bh will also dec the nonzerolen */ 18481da177e4SLinus Torvalds atomic_dec(&(cur->jlist->j_nonzerolen)); 18491da177e4SLinus Torvalds cur->bh = NULL; 18501da177e4SLinus Torvalds cur->jlist = NULL; 18511da177e4SLinus Torvalds } 18521da177e4SLinus Torvalds cur = cur->hnext; 18531da177e4SLinus Torvalds } 18541da177e4SLinus Torvalds } 18551da177e4SLinus Torvalds 1856a9dd3643SJeff Mahoney static void free_journal_ram(struct super_block *sb) 1857bd4c625cSLinus Torvalds { 1858a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 1859d739b42bSPekka Enberg kfree(journal->j_current_jl); 18601da177e4SLinus Torvalds journal->j_num_lists--; 18611da177e4SLinus Torvalds 18621da177e4SLinus Torvalds vfree(journal->j_cnode_free_orig); 1863a9dd3643SJeff Mahoney free_list_bitmaps(sb, journal->j_list_bitmap); 1864a9dd3643SJeff Mahoney free_bitmap_nodes(sb); /* must be after free_list_bitmaps */ 18651da177e4SLinus Torvalds if (journal->j_header_bh) { 18661da177e4SLinus Torvalds brelse(journal->j_header_bh); 18671da177e4SLinus Torvalds } 18681da177e4SLinus Torvalds /* j_header_bh is on the journal dev, make sure not to release the journal 18691da177e4SLinus Torvalds * dev until we brelse j_header_bh 18701da177e4SLinus Torvalds */ 1871a9dd3643SJeff Mahoney release_journal_dev(sb, journal); 18721da177e4SLinus Torvalds vfree(journal); 18731da177e4SLinus Torvalds } 18741da177e4SLinus Torvalds 18751da177e4SLinus Torvalds /* 18761da177e4SLinus Torvalds ** call on unmount. Only set error to 1 if you haven't made your way out 18771da177e4SLinus Torvalds ** of read_super() yet. Any other caller must keep error at 0. 18781da177e4SLinus Torvalds */ 1879bd4c625cSLinus Torvalds static int do_journal_release(struct reiserfs_transaction_handle *th, 1880a9dd3643SJeff Mahoney struct super_block *sb, int error) 1881bd4c625cSLinus Torvalds { 18821da177e4SLinus Torvalds struct reiserfs_transaction_handle myth; 18831da177e4SLinus Torvalds int flushed = 0; 1884a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 18851da177e4SLinus Torvalds 18861da177e4SLinus Torvalds /* we only want to flush out transactions if we were called with error == 0 18871da177e4SLinus Torvalds */ 1888a9dd3643SJeff Mahoney if (!error && !(sb->s_flags & MS_RDONLY)) { 18891da177e4SLinus Torvalds /* end the current trans */ 18901da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 1891a9dd3643SJeff Mahoney do_journal_end(th, sb, 10, FLUSH_ALL); 18921da177e4SLinus Torvalds 18931da177e4SLinus Torvalds /* make sure something gets logged to force our way into the flush code */ 1894a9dd3643SJeff Mahoney if (!journal_join(&myth, sb, 1)) { 1895a9dd3643SJeff Mahoney reiserfs_prepare_for_journal(sb, 1896a9dd3643SJeff Mahoney SB_BUFFER_WITH_SB(sb), 1897bd4c625cSLinus Torvalds 1); 1898a9dd3643SJeff Mahoney journal_mark_dirty(&myth, sb, 1899a9dd3643SJeff Mahoney SB_BUFFER_WITH_SB(sb)); 1900a9dd3643SJeff Mahoney do_journal_end(&myth, sb, 1, FLUSH_ALL); 19011da177e4SLinus Torvalds flushed = 1; 19021da177e4SLinus Torvalds } 19031da177e4SLinus Torvalds } 19041da177e4SLinus Torvalds 19051da177e4SLinus Torvalds /* this also catches errors during the do_journal_end above */ 19061da177e4SLinus Torvalds if (!error && reiserfs_is_journal_aborted(journal)) { 19071da177e4SLinus Torvalds memset(&myth, 0, sizeof(myth)); 1908a9dd3643SJeff Mahoney if (!journal_join_abort(&myth, sb, 1)) { 1909a9dd3643SJeff Mahoney reiserfs_prepare_for_journal(sb, 1910a9dd3643SJeff Mahoney SB_BUFFER_WITH_SB(sb), 1911bd4c625cSLinus Torvalds 1); 1912a9dd3643SJeff Mahoney journal_mark_dirty(&myth, sb, 1913a9dd3643SJeff Mahoney SB_BUFFER_WITH_SB(sb)); 1914a9dd3643SJeff Mahoney do_journal_end(&myth, sb, 1, FLUSH_ALL); 19151da177e4SLinus Torvalds } 19161da177e4SLinus Torvalds } 19171da177e4SLinus Torvalds 19181da177e4SLinus Torvalds reiserfs_mounted_fs_count--; 19191da177e4SLinus Torvalds /* wait for all commits to finish */ 1920a9dd3643SJeff Mahoney cancel_delayed_work(&SB_JOURNAL(sb)->j_work); 19218ebc4232SFrederic Weisbecker 19228ebc4232SFrederic Weisbecker /* 19238ebc4232SFrederic Weisbecker * We must release the write lock here because 19248ebc4232SFrederic Weisbecker * the workqueue job (flush_async_commit) needs this lock 19258ebc4232SFrederic Weisbecker */ 19268ebc4232SFrederic Weisbecker reiserfs_write_unlock(sb); 19271da177e4SLinus Torvalds flush_workqueue(commit_wq); 19288ebc4232SFrederic Weisbecker 19291da177e4SLinus Torvalds if (!reiserfs_mounted_fs_count) { 19301da177e4SLinus Torvalds destroy_workqueue(commit_wq); 19311da177e4SLinus Torvalds commit_wq = NULL; 19321da177e4SLinus Torvalds } 19331da177e4SLinus Torvalds 1934a9dd3643SJeff Mahoney free_journal_ram(sb); 19351da177e4SLinus Torvalds 19360523676dSFrederic Weisbecker reiserfs_write_lock(sb); 19370523676dSFrederic Weisbecker 19381da177e4SLinus Torvalds return 0; 19391da177e4SLinus Torvalds } 19401da177e4SLinus Torvalds 19411da177e4SLinus Torvalds /* 19421da177e4SLinus Torvalds ** call on unmount. flush all journal trans, release all alloc'd ram 19431da177e4SLinus Torvalds */ 1944bd4c625cSLinus Torvalds int journal_release(struct reiserfs_transaction_handle *th, 1945a9dd3643SJeff Mahoney struct super_block *sb) 1946bd4c625cSLinus Torvalds { 1947a9dd3643SJeff Mahoney return do_journal_release(th, sb, 0); 19481da177e4SLinus Torvalds } 1949bd4c625cSLinus Torvalds 19501da177e4SLinus Torvalds /* 19511da177e4SLinus Torvalds ** only call from an error condition inside reiserfs_read_super! 19521da177e4SLinus Torvalds */ 1953bd4c625cSLinus Torvalds int journal_release_error(struct reiserfs_transaction_handle *th, 1954a9dd3643SJeff Mahoney struct super_block *sb) 1955bd4c625cSLinus Torvalds { 1956a9dd3643SJeff Mahoney return do_journal_release(th, sb, 1); 19571da177e4SLinus Torvalds } 19581da177e4SLinus Torvalds 19591da177e4SLinus Torvalds /* compares description block with commit block. returns 1 if they differ, 0 if they are the same */ 1960a9dd3643SJeff Mahoney static int journal_compare_desc_commit(struct super_block *sb, 1961bd4c625cSLinus Torvalds struct reiserfs_journal_desc *desc, 1962bd4c625cSLinus Torvalds struct reiserfs_journal_commit *commit) 1963bd4c625cSLinus Torvalds { 19641da177e4SLinus Torvalds if (get_commit_trans_id(commit) != get_desc_trans_id(desc) || 19651da177e4SLinus Torvalds get_commit_trans_len(commit) != get_desc_trans_len(desc) || 1966a9dd3643SJeff Mahoney get_commit_trans_len(commit) > SB_JOURNAL(sb)->j_trans_max || 1967bd4c625cSLinus Torvalds get_commit_trans_len(commit) <= 0) { 19681da177e4SLinus Torvalds return 1; 19691da177e4SLinus Torvalds } 19701da177e4SLinus Torvalds return 0; 19711da177e4SLinus Torvalds } 1972bd4c625cSLinus Torvalds 19731da177e4SLinus Torvalds /* returns 0 if it did not find a description block 19741da177e4SLinus Torvalds ** returns -1 if it found a corrupt commit block 19751da177e4SLinus Torvalds ** returns 1 if both desc and commit were valid 19761da177e4SLinus Torvalds */ 1977a9dd3643SJeff Mahoney static int journal_transaction_is_valid(struct super_block *sb, 1978bd4c625cSLinus Torvalds struct buffer_head *d_bh, 1979600ed416SJeff Mahoney unsigned int *oldest_invalid_trans_id, 1980bd4c625cSLinus Torvalds unsigned long *newest_mount_id) 1981bd4c625cSLinus Torvalds { 19821da177e4SLinus Torvalds struct reiserfs_journal_desc *desc; 19831da177e4SLinus Torvalds struct reiserfs_journal_commit *commit; 19841da177e4SLinus Torvalds struct buffer_head *c_bh; 19851da177e4SLinus Torvalds unsigned long offset; 19861da177e4SLinus Torvalds 19871da177e4SLinus Torvalds if (!d_bh) 19881da177e4SLinus Torvalds return 0; 19891da177e4SLinus Torvalds 19901da177e4SLinus Torvalds desc = (struct reiserfs_journal_desc *)d_bh->b_data; 1991bd4c625cSLinus Torvalds if (get_desc_trans_len(desc) > 0 1992bd4c625cSLinus Torvalds && !memcmp(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8)) { 1993bd4c625cSLinus Torvalds if (oldest_invalid_trans_id && *oldest_invalid_trans_id 1994bd4c625cSLinus Torvalds && get_desc_trans_id(desc) > *oldest_invalid_trans_id) { 1995a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 1996bd4c625cSLinus Torvalds "journal-986: transaction " 19971da177e4SLinus Torvalds "is valid returning because trans_id %d is greater than " 1998bd4c625cSLinus Torvalds "oldest_invalid %lu", 1999bd4c625cSLinus Torvalds get_desc_trans_id(desc), 20001da177e4SLinus Torvalds *oldest_invalid_trans_id); 20011da177e4SLinus Torvalds return 0; 20021da177e4SLinus Torvalds } 2003bd4c625cSLinus Torvalds if (newest_mount_id 2004bd4c625cSLinus Torvalds && *newest_mount_id > get_desc_mount_id(desc)) { 2005a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2006bd4c625cSLinus Torvalds "journal-1087: transaction " 20071da177e4SLinus Torvalds "is valid returning because mount_id %d is less than " 2008bd4c625cSLinus Torvalds "newest_mount_id %lu", 2009bd4c625cSLinus Torvalds get_desc_mount_id(desc), 20101da177e4SLinus Torvalds *newest_mount_id); 20111da177e4SLinus Torvalds return -1; 20121da177e4SLinus Torvalds } 2013a9dd3643SJeff Mahoney if (get_desc_trans_len(desc) > SB_JOURNAL(sb)->j_trans_max) { 2014a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-2018", 201545b03d5eSJeff Mahoney "Bad transaction length %d " 201645b03d5eSJeff Mahoney "encountered, ignoring transaction", 2017bd4c625cSLinus Torvalds get_desc_trans_len(desc)); 20181da177e4SLinus Torvalds return -1; 20191da177e4SLinus Torvalds } 2020a9dd3643SJeff Mahoney offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb); 20211da177e4SLinus Torvalds 20221da177e4SLinus Torvalds /* ok, we have a journal description block, lets see if the transaction was valid */ 2023bd4c625cSLinus Torvalds c_bh = 2024a9dd3643SJeff Mahoney journal_bread(sb, 2025a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2026bd4c625cSLinus Torvalds ((offset + get_desc_trans_len(desc) + 2027a9dd3643SJeff Mahoney 1) % SB_ONDISK_JOURNAL_SIZE(sb))); 20281da177e4SLinus Torvalds if (!c_bh) 20291da177e4SLinus Torvalds return 0; 20301da177e4SLinus Torvalds commit = (struct reiserfs_journal_commit *)c_bh->b_data; 2031a9dd3643SJeff Mahoney if (journal_compare_desc_commit(sb, desc, commit)) { 2032a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 20331da177e4SLinus Torvalds "journal_transaction_is_valid, commit offset %ld had bad " 20341da177e4SLinus Torvalds "time %d or length %d", 2035bd4c625cSLinus Torvalds c_bh->b_blocknr - 2036a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb), 20371da177e4SLinus Torvalds get_commit_trans_id(commit), 20381da177e4SLinus Torvalds get_commit_trans_len(commit)); 20391da177e4SLinus Torvalds brelse(c_bh); 20401da177e4SLinus Torvalds if (oldest_invalid_trans_id) { 2041bd4c625cSLinus Torvalds *oldest_invalid_trans_id = 2042bd4c625cSLinus Torvalds get_desc_trans_id(desc); 2043a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2044bd4c625cSLinus Torvalds "journal-1004: " 20451da177e4SLinus Torvalds "transaction_is_valid setting oldest invalid trans_id " 2046bd4c625cSLinus Torvalds "to %d", 2047bd4c625cSLinus Torvalds get_desc_trans_id(desc)); 20481da177e4SLinus Torvalds } 20491da177e4SLinus Torvalds return -1; 20501da177e4SLinus Torvalds } 20511da177e4SLinus Torvalds brelse(c_bh); 2052a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2053bd4c625cSLinus Torvalds "journal-1006: found valid " 20541da177e4SLinus Torvalds "transaction start offset %llu, len %d id %d", 2055bd4c625cSLinus Torvalds d_bh->b_blocknr - 2056a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb), 2057bd4c625cSLinus Torvalds get_desc_trans_len(desc), 2058bd4c625cSLinus Torvalds get_desc_trans_id(desc)); 20591da177e4SLinus Torvalds return 1; 20601da177e4SLinus Torvalds } else { 20611da177e4SLinus Torvalds return 0; 20621da177e4SLinus Torvalds } 20631da177e4SLinus Torvalds } 20641da177e4SLinus Torvalds 2065bd4c625cSLinus Torvalds static void brelse_array(struct buffer_head **heads, int num) 2066bd4c625cSLinus Torvalds { 20671da177e4SLinus Torvalds int i; 20681da177e4SLinus Torvalds for (i = 0; i < num; i++) { 20691da177e4SLinus Torvalds brelse(heads[i]); 20701da177e4SLinus Torvalds } 20711da177e4SLinus Torvalds } 20721da177e4SLinus Torvalds 20731da177e4SLinus Torvalds /* 20741da177e4SLinus Torvalds ** given the start, and values for the oldest acceptable transactions, 20751da177e4SLinus Torvalds ** this either reads in a replays a transaction, or returns because the transaction 20761da177e4SLinus Torvalds ** is invalid, or too old. 20771da177e4SLinus Torvalds */ 2078a9dd3643SJeff Mahoney static int journal_read_transaction(struct super_block *sb, 2079bd4c625cSLinus Torvalds unsigned long cur_dblock, 2080bd4c625cSLinus Torvalds unsigned long oldest_start, 2081600ed416SJeff Mahoney unsigned int oldest_trans_id, 2082bd4c625cSLinus Torvalds unsigned long newest_mount_id) 2083bd4c625cSLinus Torvalds { 2084a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 20851da177e4SLinus Torvalds struct reiserfs_journal_desc *desc; 20861da177e4SLinus Torvalds struct reiserfs_journal_commit *commit; 2087600ed416SJeff Mahoney unsigned int trans_id = 0; 20881da177e4SLinus Torvalds struct buffer_head *c_bh; 20891da177e4SLinus Torvalds struct buffer_head *d_bh; 20901da177e4SLinus Torvalds struct buffer_head **log_blocks = NULL; 20911da177e4SLinus Torvalds struct buffer_head **real_blocks = NULL; 2092600ed416SJeff Mahoney unsigned int trans_offset; 20931da177e4SLinus Torvalds int i; 20941da177e4SLinus Torvalds int trans_half; 20951da177e4SLinus Torvalds 2096a9dd3643SJeff Mahoney d_bh = journal_bread(sb, cur_dblock); 20971da177e4SLinus Torvalds if (!d_bh) 20981da177e4SLinus Torvalds return 1; 20991da177e4SLinus Torvalds desc = (struct reiserfs_journal_desc *)d_bh->b_data; 2100a9dd3643SJeff Mahoney trans_offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb); 2101a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1037: " 21021da177e4SLinus Torvalds "journal_read_transaction, offset %llu, len %d mount_id %d", 2103a9dd3643SJeff Mahoney d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb), 21041da177e4SLinus Torvalds get_desc_trans_len(desc), get_desc_mount_id(desc)); 21051da177e4SLinus Torvalds if (get_desc_trans_id(desc) < oldest_trans_id) { 2106a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1039: " 21071da177e4SLinus Torvalds "journal_read_trans skipping because %lu is too old", 2108bd4c625cSLinus Torvalds cur_dblock - 2109a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb)); 21101da177e4SLinus Torvalds brelse(d_bh); 21111da177e4SLinus Torvalds return 1; 21121da177e4SLinus Torvalds } 21131da177e4SLinus Torvalds if (get_desc_mount_id(desc) != newest_mount_id) { 2114a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1146: " 21151da177e4SLinus Torvalds "journal_read_trans skipping because %d is != " 21161da177e4SLinus Torvalds "newest_mount_id %lu", get_desc_mount_id(desc), 21171da177e4SLinus Torvalds newest_mount_id); 21181da177e4SLinus Torvalds brelse(d_bh); 21191da177e4SLinus Torvalds return 1; 21201da177e4SLinus Torvalds } 2121a9dd3643SJeff Mahoney c_bh = journal_bread(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 21221da177e4SLinus Torvalds ((trans_offset + get_desc_trans_len(desc) + 1) % 2123a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb))); 21241da177e4SLinus Torvalds if (!c_bh) { 21251da177e4SLinus Torvalds brelse(d_bh); 21261da177e4SLinus Torvalds return 1; 21271da177e4SLinus Torvalds } 21281da177e4SLinus Torvalds commit = (struct reiserfs_journal_commit *)c_bh->b_data; 2129a9dd3643SJeff Mahoney if (journal_compare_desc_commit(sb, desc, commit)) { 2130a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2131bd4c625cSLinus Torvalds "journal_read_transaction, " 21321da177e4SLinus Torvalds "commit offset %llu had bad time %d or length %d", 2133bd4c625cSLinus Torvalds c_bh->b_blocknr - 2134a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb), 2135bd4c625cSLinus Torvalds get_commit_trans_id(commit), 2136bd4c625cSLinus Torvalds get_commit_trans_len(commit)); 21371da177e4SLinus Torvalds brelse(c_bh); 21381da177e4SLinus Torvalds brelse(d_bh); 21391da177e4SLinus Torvalds return 1; 21401da177e4SLinus Torvalds } 21413f8b5ee3SJeff Mahoney 21423f8b5ee3SJeff Mahoney if (bdev_read_only(sb->s_bdev)) { 21433f8b5ee3SJeff Mahoney reiserfs_warning(sb, "clm-2076", 21443f8b5ee3SJeff Mahoney "device is readonly, unable to replay log"); 21453f8b5ee3SJeff Mahoney brelse(c_bh); 21463f8b5ee3SJeff Mahoney brelse(d_bh); 21473f8b5ee3SJeff Mahoney return -EROFS; 21483f8b5ee3SJeff Mahoney } 21493f8b5ee3SJeff Mahoney 21501da177e4SLinus Torvalds trans_id = get_desc_trans_id(desc); 21511da177e4SLinus Torvalds /* now we know we've got a good transaction, and it was inside the valid time ranges */ 2152d739b42bSPekka Enberg log_blocks = kmalloc(get_desc_trans_len(desc) * 2153d739b42bSPekka Enberg sizeof(struct buffer_head *), GFP_NOFS); 2154d739b42bSPekka Enberg real_blocks = kmalloc(get_desc_trans_len(desc) * 2155d739b42bSPekka Enberg sizeof(struct buffer_head *), GFP_NOFS); 21561da177e4SLinus Torvalds if (!log_blocks || !real_blocks) { 21571da177e4SLinus Torvalds brelse(c_bh); 21581da177e4SLinus Torvalds brelse(d_bh); 2159d739b42bSPekka Enberg kfree(log_blocks); 2160d739b42bSPekka Enberg kfree(real_blocks); 2161a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1169", 216245b03d5eSJeff Mahoney "kmalloc failed, unable to mount FS"); 21631da177e4SLinus Torvalds return -1; 21641da177e4SLinus Torvalds } 21651da177e4SLinus Torvalds /* get all the buffer heads */ 2166a9dd3643SJeff Mahoney trans_half = journal_trans_half(sb->s_blocksize); 21671da177e4SLinus Torvalds for (i = 0; i < get_desc_trans_len(desc); i++) { 2168bd4c625cSLinus Torvalds log_blocks[i] = 2169a9dd3643SJeff Mahoney journal_getblk(sb, 2170a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2171bd4c625cSLinus Torvalds (trans_offset + 1 + 2172a9dd3643SJeff Mahoney i) % SB_ONDISK_JOURNAL_SIZE(sb)); 21731da177e4SLinus Torvalds if (i < trans_half) { 2174bd4c625cSLinus Torvalds real_blocks[i] = 2175a9dd3643SJeff Mahoney sb_getblk(sb, 2176bd4c625cSLinus Torvalds le32_to_cpu(desc->j_realblock[i])); 21771da177e4SLinus Torvalds } else { 2178bd4c625cSLinus Torvalds real_blocks[i] = 2179a9dd3643SJeff Mahoney sb_getblk(sb, 2180bd4c625cSLinus Torvalds le32_to_cpu(commit-> 2181bd4c625cSLinus Torvalds j_realblock[i - trans_half])); 21821da177e4SLinus Torvalds } 2183a9dd3643SJeff Mahoney if (real_blocks[i]->b_blocknr > SB_BLOCK_COUNT(sb)) { 2184a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1207", 218545b03d5eSJeff Mahoney "REPLAY FAILURE fsck required! " 218645b03d5eSJeff Mahoney "Block to replay is outside of " 218745b03d5eSJeff Mahoney "filesystem"); 21881da177e4SLinus Torvalds goto abort_replay; 21891da177e4SLinus Torvalds } 21901da177e4SLinus Torvalds /* make sure we don't try to replay onto log or reserved area */ 2191bd4c625cSLinus Torvalds if (is_block_in_log_or_reserved_area 2192a9dd3643SJeff Mahoney (sb, real_blocks[i]->b_blocknr)) { 2193a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1204", 219445b03d5eSJeff Mahoney "REPLAY FAILURE fsck required! " 219545b03d5eSJeff Mahoney "Trying to replay onto a log block"); 21961da177e4SLinus Torvalds abort_replay: 21971da177e4SLinus Torvalds brelse_array(log_blocks, i); 21981da177e4SLinus Torvalds brelse_array(real_blocks, i); 21991da177e4SLinus Torvalds brelse(c_bh); 22001da177e4SLinus Torvalds brelse(d_bh); 2201d739b42bSPekka Enberg kfree(log_blocks); 2202d739b42bSPekka Enberg kfree(real_blocks); 22031da177e4SLinus Torvalds return -1; 22041da177e4SLinus Torvalds } 22051da177e4SLinus Torvalds } 22061da177e4SLinus Torvalds /* read in the log blocks, memcpy to the corresponding real block */ 22071da177e4SLinus Torvalds ll_rw_block(READ, get_desc_trans_len(desc), log_blocks); 22081da177e4SLinus Torvalds for (i = 0; i < get_desc_trans_len(desc); i++) { 22098ebc4232SFrederic Weisbecker 22108ebc4232SFrederic Weisbecker reiserfs_write_unlock(sb); 22111da177e4SLinus Torvalds wait_on_buffer(log_blocks[i]); 22128ebc4232SFrederic Weisbecker reiserfs_write_lock(sb); 22138ebc4232SFrederic Weisbecker 22141da177e4SLinus Torvalds if (!buffer_uptodate(log_blocks[i])) { 2215a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1212", 221645b03d5eSJeff Mahoney "REPLAY FAILURE fsck required! " 221745b03d5eSJeff Mahoney "buffer write failed"); 2218bd4c625cSLinus Torvalds brelse_array(log_blocks + i, 2219bd4c625cSLinus Torvalds get_desc_trans_len(desc) - i); 22201da177e4SLinus Torvalds brelse_array(real_blocks, get_desc_trans_len(desc)); 22211da177e4SLinus Torvalds brelse(c_bh); 22221da177e4SLinus Torvalds brelse(d_bh); 2223d739b42bSPekka Enberg kfree(log_blocks); 2224d739b42bSPekka Enberg kfree(real_blocks); 22251da177e4SLinus Torvalds return -1; 22261da177e4SLinus Torvalds } 2227bd4c625cSLinus Torvalds memcpy(real_blocks[i]->b_data, log_blocks[i]->b_data, 2228bd4c625cSLinus Torvalds real_blocks[i]->b_size); 22291da177e4SLinus Torvalds set_buffer_uptodate(real_blocks[i]); 22301da177e4SLinus Torvalds brelse(log_blocks[i]); 22311da177e4SLinus Torvalds } 22321da177e4SLinus Torvalds /* flush out the real blocks */ 22331da177e4SLinus Torvalds for (i = 0; i < get_desc_trans_len(desc); i++) { 22341da177e4SLinus Torvalds set_buffer_dirty(real_blocks[i]); 22359cb569d6SChristoph Hellwig write_dirty_buffer(real_blocks[i], WRITE); 22361da177e4SLinus Torvalds } 22371da177e4SLinus Torvalds for (i = 0; i < get_desc_trans_len(desc); i++) { 22381da177e4SLinus Torvalds wait_on_buffer(real_blocks[i]); 22391da177e4SLinus Torvalds if (!buffer_uptodate(real_blocks[i])) { 2240a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1226", 224145b03d5eSJeff Mahoney "REPLAY FAILURE, fsck required! " 224245b03d5eSJeff Mahoney "buffer write failed"); 2243bd4c625cSLinus Torvalds brelse_array(real_blocks + i, 2244bd4c625cSLinus Torvalds get_desc_trans_len(desc) - i); 22451da177e4SLinus Torvalds brelse(c_bh); 22461da177e4SLinus Torvalds brelse(d_bh); 2247d739b42bSPekka Enberg kfree(log_blocks); 2248d739b42bSPekka Enberg kfree(real_blocks); 22491da177e4SLinus Torvalds return -1; 22501da177e4SLinus Torvalds } 22511da177e4SLinus Torvalds brelse(real_blocks[i]); 22521da177e4SLinus Torvalds } 2253bd4c625cSLinus Torvalds cur_dblock = 2254a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2255bd4c625cSLinus Torvalds ((trans_offset + get_desc_trans_len(desc) + 2256a9dd3643SJeff Mahoney 2) % SB_ONDISK_JOURNAL_SIZE(sb)); 2257a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2258bd4c625cSLinus Torvalds "journal-1095: setting journal " "start to offset %ld", 2259a9dd3643SJeff Mahoney cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb)); 22601da177e4SLinus Torvalds 22611da177e4SLinus Torvalds /* init starting values for the first transaction, in case this is the last transaction to be replayed. */ 2262a9dd3643SJeff Mahoney journal->j_start = cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb); 22631da177e4SLinus Torvalds journal->j_last_flush_trans_id = trans_id; 22641da177e4SLinus Torvalds journal->j_trans_id = trans_id + 1; 2265a44c94a7SAlexander Zarochentsev /* check for trans_id overflow */ 2266a44c94a7SAlexander Zarochentsev if (journal->j_trans_id == 0) 2267a44c94a7SAlexander Zarochentsev journal->j_trans_id = 10; 22681da177e4SLinus Torvalds brelse(c_bh); 22691da177e4SLinus Torvalds brelse(d_bh); 2270d739b42bSPekka Enberg kfree(log_blocks); 2271d739b42bSPekka Enberg kfree(real_blocks); 22721da177e4SLinus Torvalds return 0; 22731da177e4SLinus Torvalds } 22741da177e4SLinus Torvalds 22751da177e4SLinus Torvalds /* This function reads blocks starting from block and to max_block of bufsize 22761da177e4SLinus Torvalds size (but no more than BUFNR blocks at a time). This proved to improve 22771da177e4SLinus Torvalds mounting speed on self-rebuilding raid5 arrays at least. 22781da177e4SLinus Torvalds Right now it is only used from journal code. But later we might use it 22791da177e4SLinus Torvalds from other places. 22801da177e4SLinus Torvalds Note: Do not use journal_getblk/sb_getblk functions here! */ 22813ee16670SJeff Mahoney static struct buffer_head *reiserfs_breada(struct block_device *dev, 22823ee16670SJeff Mahoney b_blocknr_t block, int bufsize, 22833ee16670SJeff Mahoney b_blocknr_t max_block) 22841da177e4SLinus Torvalds { 22851da177e4SLinus Torvalds struct buffer_head *bhlist[BUFNR]; 22861da177e4SLinus Torvalds unsigned int blocks = BUFNR; 22871da177e4SLinus Torvalds struct buffer_head *bh; 22881da177e4SLinus Torvalds int i, j; 22891da177e4SLinus Torvalds 22901da177e4SLinus Torvalds bh = __getblk(dev, block, bufsize); 22911da177e4SLinus Torvalds if (buffer_uptodate(bh)) 22921da177e4SLinus Torvalds return (bh); 22931da177e4SLinus Torvalds 22941da177e4SLinus Torvalds if (block + BUFNR > max_block) { 22951da177e4SLinus Torvalds blocks = max_block - block; 22961da177e4SLinus Torvalds } 22971da177e4SLinus Torvalds bhlist[0] = bh; 22981da177e4SLinus Torvalds j = 1; 22991da177e4SLinus Torvalds for (i = 1; i < blocks; i++) { 23001da177e4SLinus Torvalds bh = __getblk(dev, block + i, bufsize); 23011da177e4SLinus Torvalds if (buffer_uptodate(bh)) { 23021da177e4SLinus Torvalds brelse(bh); 23031da177e4SLinus Torvalds break; 2304bd4c625cSLinus Torvalds } else 2305bd4c625cSLinus Torvalds bhlist[j++] = bh; 23061da177e4SLinus Torvalds } 23071da177e4SLinus Torvalds ll_rw_block(READ, j, bhlist); 23081da177e4SLinus Torvalds for (i = 1; i < j; i++) 23091da177e4SLinus Torvalds brelse(bhlist[i]); 23101da177e4SLinus Torvalds bh = bhlist[0]; 23111da177e4SLinus Torvalds wait_on_buffer(bh); 23121da177e4SLinus Torvalds if (buffer_uptodate(bh)) 23131da177e4SLinus Torvalds return bh; 23141da177e4SLinus Torvalds brelse(bh); 23151da177e4SLinus Torvalds return NULL; 23161da177e4SLinus Torvalds } 23171da177e4SLinus Torvalds 23181da177e4SLinus Torvalds /* 23191da177e4SLinus Torvalds ** read and replay the log 23201da177e4SLinus Torvalds ** on a clean unmount, the journal header's next unflushed pointer will be to an invalid 23211da177e4SLinus Torvalds ** transaction. This tests that before finding all the transactions in the log, which makes normal mount times fast. 23221da177e4SLinus Torvalds ** 23231da177e4SLinus Torvalds ** After a crash, this starts with the next unflushed transaction, and replays until it finds one too old, or invalid. 23241da177e4SLinus Torvalds ** 23251da177e4SLinus Torvalds ** On exit, it sets things up so the first transaction will work correctly. 23261da177e4SLinus Torvalds */ 2327a9dd3643SJeff Mahoney static int journal_read(struct super_block *sb) 2328bd4c625cSLinus Torvalds { 2329a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 23301da177e4SLinus Torvalds struct reiserfs_journal_desc *desc; 2331600ed416SJeff Mahoney unsigned int oldest_trans_id = 0; 2332600ed416SJeff Mahoney unsigned int oldest_invalid_trans_id = 0; 23331da177e4SLinus Torvalds time_t start; 23341da177e4SLinus Torvalds unsigned long oldest_start = 0; 23351da177e4SLinus Torvalds unsigned long cur_dblock = 0; 23361da177e4SLinus Torvalds unsigned long newest_mount_id = 9; 23371da177e4SLinus Torvalds struct buffer_head *d_bh; 23381da177e4SLinus Torvalds struct reiserfs_journal_header *jh; 23391da177e4SLinus Torvalds int valid_journal_header = 0; 23401da177e4SLinus Torvalds int replay_count = 0; 23411da177e4SLinus Torvalds int continue_replay = 1; 23421da177e4SLinus Torvalds int ret; 23431da177e4SLinus Torvalds char b[BDEVNAME_SIZE]; 23441da177e4SLinus Torvalds 2345a9dd3643SJeff Mahoney cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(sb); 2346a9dd3643SJeff Mahoney reiserfs_info(sb, "checking transaction log (%s)\n", 23471da177e4SLinus Torvalds bdevname(journal->j_dev_bd, b)); 23481da177e4SLinus Torvalds start = get_seconds(); 23491da177e4SLinus Torvalds 23501da177e4SLinus Torvalds /* step 1, read in the journal header block. Check the transaction it says 23511da177e4SLinus Torvalds ** is the first unflushed, and if that transaction is not valid, 23521da177e4SLinus Torvalds ** replay is done 23531da177e4SLinus Torvalds */ 2354a9dd3643SJeff Mahoney journal->j_header_bh = journal_bread(sb, 2355a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) 2356a9dd3643SJeff Mahoney + SB_ONDISK_JOURNAL_SIZE(sb)); 23571da177e4SLinus Torvalds if (!journal->j_header_bh) { 23581da177e4SLinus Torvalds return 1; 23591da177e4SLinus Torvalds } 23601da177e4SLinus Torvalds jh = (struct reiserfs_journal_header *)(journal->j_header_bh->b_data); 2361c499ec24SVladimir V. Saveliev if (le32_to_cpu(jh->j_first_unflushed_offset) < 2362a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb) 2363bd4c625cSLinus Torvalds && le32_to_cpu(jh->j_last_flush_trans_id) > 0) { 2364bd4c625cSLinus Torvalds oldest_start = 2365a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 23661da177e4SLinus Torvalds le32_to_cpu(jh->j_first_unflushed_offset); 23671da177e4SLinus Torvalds oldest_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) + 1; 23681da177e4SLinus Torvalds newest_mount_id = le32_to_cpu(jh->j_mount_id); 2369a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2370bd4c625cSLinus Torvalds "journal-1153: found in " 23711da177e4SLinus Torvalds "header: first_unflushed_offset %d, last_flushed_trans_id " 23721da177e4SLinus Torvalds "%lu", le32_to_cpu(jh->j_first_unflushed_offset), 23731da177e4SLinus Torvalds le32_to_cpu(jh->j_last_flush_trans_id)); 23741da177e4SLinus Torvalds valid_journal_header = 1; 23751da177e4SLinus Torvalds 23761da177e4SLinus Torvalds /* now, we try to read the first unflushed offset. If it is not valid, 23771da177e4SLinus Torvalds ** there is nothing more we can do, and it makes no sense to read 23781da177e4SLinus Torvalds ** through the whole log. 23791da177e4SLinus Torvalds */ 2380bd4c625cSLinus Torvalds d_bh = 2381a9dd3643SJeff Mahoney journal_bread(sb, 2382a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2383bd4c625cSLinus Torvalds le32_to_cpu(jh->j_first_unflushed_offset)); 2384a9dd3643SJeff Mahoney ret = journal_transaction_is_valid(sb, d_bh, NULL, NULL); 23851da177e4SLinus Torvalds if (!ret) { 23861da177e4SLinus Torvalds continue_replay = 0; 23871da177e4SLinus Torvalds } 23881da177e4SLinus Torvalds brelse(d_bh); 23891da177e4SLinus Torvalds goto start_log_replay; 23901da177e4SLinus Torvalds } 23911da177e4SLinus Torvalds 23921da177e4SLinus Torvalds /* ok, there are transactions that need to be replayed. start with the first log block, find 23931da177e4SLinus Torvalds ** all the valid transactions, and pick out the oldest. 23941da177e4SLinus Torvalds */ 2395bd4c625cSLinus Torvalds while (continue_replay 2396bd4c625cSLinus Torvalds && cur_dblock < 2397a9dd3643SJeff Mahoney (SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2398a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb))) { 23991da177e4SLinus Torvalds /* Note that it is required for blocksize of primary fs device and journal 24001da177e4SLinus Torvalds device to be the same */ 2401bd4c625cSLinus Torvalds d_bh = 2402bd4c625cSLinus Torvalds reiserfs_breada(journal->j_dev_bd, cur_dblock, 2403a9dd3643SJeff Mahoney sb->s_blocksize, 2404a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2405a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb)); 2406bd4c625cSLinus Torvalds ret = 2407a9dd3643SJeff Mahoney journal_transaction_is_valid(sb, d_bh, 2408bd4c625cSLinus Torvalds &oldest_invalid_trans_id, 2409bd4c625cSLinus Torvalds &newest_mount_id); 24101da177e4SLinus Torvalds if (ret == 1) { 24111da177e4SLinus Torvalds desc = (struct reiserfs_journal_desc *)d_bh->b_data; 24121da177e4SLinus Torvalds if (oldest_start == 0) { /* init all oldest_ values */ 24131da177e4SLinus Torvalds oldest_trans_id = get_desc_trans_id(desc); 24141da177e4SLinus Torvalds oldest_start = d_bh->b_blocknr; 24151da177e4SLinus Torvalds newest_mount_id = get_desc_mount_id(desc); 2416a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2417bd4c625cSLinus Torvalds "journal-1179: Setting " 24181da177e4SLinus Torvalds "oldest_start to offset %llu, trans_id %lu", 2419bd4c625cSLinus Torvalds oldest_start - 2420bd4c625cSLinus Torvalds SB_ONDISK_JOURNAL_1st_BLOCK 2421a9dd3643SJeff Mahoney (sb), oldest_trans_id); 24221da177e4SLinus Torvalds } else if (oldest_trans_id > get_desc_trans_id(desc)) { 24231da177e4SLinus Torvalds /* one we just read was older */ 24241da177e4SLinus Torvalds oldest_trans_id = get_desc_trans_id(desc); 24251da177e4SLinus Torvalds oldest_start = d_bh->b_blocknr; 2426a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2427bd4c625cSLinus Torvalds "journal-1180: Resetting " 24281da177e4SLinus Torvalds "oldest_start to offset %lu, trans_id %lu", 2429bd4c625cSLinus Torvalds oldest_start - 2430bd4c625cSLinus Torvalds SB_ONDISK_JOURNAL_1st_BLOCK 2431a9dd3643SJeff Mahoney (sb), oldest_trans_id); 24321da177e4SLinus Torvalds } 24331da177e4SLinus Torvalds if (newest_mount_id < get_desc_mount_id(desc)) { 24341da177e4SLinus Torvalds newest_mount_id = get_desc_mount_id(desc); 2435a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2436bd4c625cSLinus Torvalds "journal-1299: Setting " 2437bd4c625cSLinus Torvalds "newest_mount_id to %d", 2438bd4c625cSLinus Torvalds get_desc_mount_id(desc)); 24391da177e4SLinus Torvalds } 24401da177e4SLinus Torvalds cur_dblock += get_desc_trans_len(desc) + 2; 24411da177e4SLinus Torvalds } else { 24421da177e4SLinus Torvalds cur_dblock++; 24431da177e4SLinus Torvalds } 24441da177e4SLinus Torvalds brelse(d_bh); 24451da177e4SLinus Torvalds } 24461da177e4SLinus Torvalds 24471da177e4SLinus Torvalds start_log_replay: 24481da177e4SLinus Torvalds cur_dblock = oldest_start; 24491da177e4SLinus Torvalds if (oldest_trans_id) { 2450a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2451bd4c625cSLinus Torvalds "journal-1206: Starting replay " 24521da177e4SLinus Torvalds "from offset %llu, trans_id %lu", 2453a9dd3643SJeff Mahoney cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb), 24541da177e4SLinus Torvalds oldest_trans_id); 24551da177e4SLinus Torvalds 24561da177e4SLinus Torvalds } 24571da177e4SLinus Torvalds replay_count = 0; 24581da177e4SLinus Torvalds while (continue_replay && oldest_trans_id > 0) { 2459bd4c625cSLinus Torvalds ret = 2460a9dd3643SJeff Mahoney journal_read_transaction(sb, cur_dblock, oldest_start, 2461bd4c625cSLinus Torvalds oldest_trans_id, newest_mount_id); 24621da177e4SLinus Torvalds if (ret < 0) { 24631da177e4SLinus Torvalds return ret; 24641da177e4SLinus Torvalds } else if (ret != 0) { 24651da177e4SLinus Torvalds break; 24661da177e4SLinus Torvalds } 2467bd4c625cSLinus Torvalds cur_dblock = 2468a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + journal->j_start; 24691da177e4SLinus Torvalds replay_count++; 24701da177e4SLinus Torvalds if (cur_dblock == oldest_start) 24711da177e4SLinus Torvalds break; 24721da177e4SLinus Torvalds } 24731da177e4SLinus Torvalds 24741da177e4SLinus Torvalds if (oldest_trans_id == 0) { 2475a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2476bd4c625cSLinus Torvalds "journal-1225: No valid " "transactions found"); 24771da177e4SLinus Torvalds } 24781da177e4SLinus Torvalds /* j_start does not get set correctly if we don't replay any transactions. 24791da177e4SLinus Torvalds ** if we had a valid journal_header, set j_start to the first unflushed transaction value, 24801da177e4SLinus Torvalds ** copy the trans_id from the header 24811da177e4SLinus Torvalds */ 24821da177e4SLinus Torvalds if (valid_journal_header && replay_count == 0) { 24831da177e4SLinus Torvalds journal->j_start = le32_to_cpu(jh->j_first_unflushed_offset); 2484bd4c625cSLinus Torvalds journal->j_trans_id = 2485bd4c625cSLinus Torvalds le32_to_cpu(jh->j_last_flush_trans_id) + 1; 2486a44c94a7SAlexander Zarochentsev /* check for trans_id overflow */ 2487a44c94a7SAlexander Zarochentsev if (journal->j_trans_id == 0) 2488a44c94a7SAlexander Zarochentsev journal->j_trans_id = 10; 2489bd4c625cSLinus Torvalds journal->j_last_flush_trans_id = 2490bd4c625cSLinus Torvalds le32_to_cpu(jh->j_last_flush_trans_id); 24911da177e4SLinus Torvalds journal->j_mount_id = le32_to_cpu(jh->j_mount_id) + 1; 24921da177e4SLinus Torvalds } else { 24931da177e4SLinus Torvalds journal->j_mount_id = newest_mount_id + 1; 24941da177e4SLinus Torvalds } 2495a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1299: Setting " 24961da177e4SLinus Torvalds "newest_mount_id to %lu", journal->j_mount_id); 24971da177e4SLinus Torvalds journal->j_first_unflushed_offset = journal->j_start; 24981da177e4SLinus Torvalds if (replay_count > 0) { 2499a9dd3643SJeff Mahoney reiserfs_info(sb, 2500bd4c625cSLinus Torvalds "replayed %d transactions in %lu seconds\n", 25011da177e4SLinus Torvalds replay_count, get_seconds() - start); 25021da177e4SLinus Torvalds } 2503a9dd3643SJeff Mahoney if (!bdev_read_only(sb->s_bdev) && 2504a9dd3643SJeff Mahoney _update_journal_header_block(sb, journal->j_start, 2505bd4c625cSLinus Torvalds journal->j_last_flush_trans_id)) { 25061da177e4SLinus Torvalds /* replay failed, caller must call free_journal_ram and abort 25071da177e4SLinus Torvalds ** the mount 25081da177e4SLinus Torvalds */ 25091da177e4SLinus Torvalds return -1; 25101da177e4SLinus Torvalds } 25111da177e4SLinus Torvalds return 0; 25121da177e4SLinus Torvalds } 25131da177e4SLinus Torvalds 25141da177e4SLinus Torvalds static struct reiserfs_journal_list *alloc_journal_list(struct super_block *s) 25151da177e4SLinus Torvalds { 25161da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 25178c777cc4SPekka Enberg jl = kzalloc(sizeof(struct reiserfs_journal_list), 25188c777cc4SPekka Enberg GFP_NOFS | __GFP_NOFAIL); 25191da177e4SLinus Torvalds INIT_LIST_HEAD(&jl->j_list); 25201da177e4SLinus Torvalds INIT_LIST_HEAD(&jl->j_working_list); 25211da177e4SLinus Torvalds INIT_LIST_HEAD(&jl->j_tail_bh_list); 25221da177e4SLinus Torvalds INIT_LIST_HEAD(&jl->j_bh_list); 252390415deaSJeff Mahoney mutex_init(&jl->j_commit_mutex); 25241da177e4SLinus Torvalds SB_JOURNAL(s)->j_num_lists++; 25251da177e4SLinus Torvalds get_journal_list(jl); 25261da177e4SLinus Torvalds return jl; 25271da177e4SLinus Torvalds } 25281da177e4SLinus Torvalds 2529a9dd3643SJeff Mahoney static void journal_list_init(struct super_block *sb) 2530bd4c625cSLinus Torvalds { 2531a9dd3643SJeff Mahoney SB_JOURNAL(sb)->j_current_jl = alloc_journal_list(sb); 25321da177e4SLinus Torvalds } 25331da177e4SLinus Torvalds 25341da177e4SLinus Torvalds static int release_journal_dev(struct super_block *super, 25351da177e4SLinus Torvalds struct reiserfs_journal *journal) 25361da177e4SLinus Torvalds { 25371da177e4SLinus Torvalds int result; 25381da177e4SLinus Torvalds 25391da177e4SLinus Torvalds result = 0; 25401da177e4SLinus Torvalds 254186098fa0SChristoph Hellwig if (journal->j_dev_bd != NULL) { 2542e5eb8caaSAl Viro result = blkdev_put(journal->j_dev_bd, journal->j_dev_mode); 25431da177e4SLinus Torvalds journal->j_dev_bd = NULL; 25441da177e4SLinus Torvalds } 25451da177e4SLinus Torvalds 25461da177e4SLinus Torvalds if (result != 0) { 254745b03d5eSJeff Mahoney reiserfs_warning(super, "sh-457", 254845b03d5eSJeff Mahoney "Cannot release journal device: %i", result); 25491da177e4SLinus Torvalds } 25501da177e4SLinus Torvalds return result; 25511da177e4SLinus Torvalds } 25521da177e4SLinus Torvalds 25531da177e4SLinus Torvalds static int journal_init_dev(struct super_block *super, 25541da177e4SLinus Torvalds struct reiserfs_journal *journal, 25551da177e4SLinus Torvalds const char *jdev_name) 25561da177e4SLinus Torvalds { 25571da177e4SLinus Torvalds int result; 25581da177e4SLinus Torvalds dev_t jdev; 2559e525fd89STejun Heo fmode_t blkdev_mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL; 25601da177e4SLinus Torvalds char b[BDEVNAME_SIZE]; 25611da177e4SLinus Torvalds 25621da177e4SLinus Torvalds result = 0; 25631da177e4SLinus Torvalds 25641da177e4SLinus Torvalds journal->j_dev_bd = NULL; 25651da177e4SLinus Torvalds jdev = SB_ONDISK_JOURNAL_DEVICE(super) ? 25661da177e4SLinus Torvalds new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super)) : super->s_dev; 25671da177e4SLinus Torvalds 25681da177e4SLinus Torvalds if (bdev_read_only(super->s_bdev)) 25691da177e4SLinus Torvalds blkdev_mode = FMODE_READ; 25701da177e4SLinus Torvalds 25711da177e4SLinus Torvalds /* there is no "jdev" option and journal is on separate device */ 25721da177e4SLinus Torvalds if ((!jdev_name || !jdev_name[0])) { 2573e525fd89STejun Heo if (jdev == super->s_dev) 2574e525fd89STejun Heo blkdev_mode &= ~FMODE_EXCL; 2575d4d77629STejun Heo journal->j_dev_bd = blkdev_get_by_dev(jdev, blkdev_mode, 2576d4d77629STejun Heo journal); 2577e5eb8caaSAl Viro journal->j_dev_mode = blkdev_mode; 25781da177e4SLinus Torvalds if (IS_ERR(journal->j_dev_bd)) { 25791da177e4SLinus Torvalds result = PTR_ERR(journal->j_dev_bd); 25801da177e4SLinus Torvalds journal->j_dev_bd = NULL; 258145b03d5eSJeff Mahoney reiserfs_warning(super, "sh-458", 25821da177e4SLinus Torvalds "cannot init journal device '%s': %i", 25831da177e4SLinus Torvalds __bdevname(jdev, b), result); 25841da177e4SLinus Torvalds return result; 2585e525fd89STejun Heo } else if (jdev != super->s_dev) 25861da177e4SLinus Torvalds set_blocksize(journal->j_dev_bd, super->s_blocksize); 258786098fa0SChristoph Hellwig 25881da177e4SLinus Torvalds return 0; 25891da177e4SLinus Torvalds } 25901da177e4SLinus Torvalds 2591e5eb8caaSAl Viro journal->j_dev_mode = blkdev_mode; 2592d4d77629STejun Heo journal->j_dev_bd = blkdev_get_by_path(jdev_name, blkdev_mode, journal); 259386098fa0SChristoph Hellwig if (IS_ERR(journal->j_dev_bd)) { 259486098fa0SChristoph Hellwig result = PTR_ERR(journal->j_dev_bd); 259586098fa0SChristoph Hellwig journal->j_dev_bd = NULL; 259686098fa0SChristoph Hellwig reiserfs_warning(super, 259786098fa0SChristoph Hellwig "journal_init_dev: Cannot open '%s': %i", 259886098fa0SChristoph Hellwig jdev_name, result); 259986098fa0SChristoph Hellwig return result; 260086098fa0SChristoph Hellwig } 260186098fa0SChristoph Hellwig 26021da177e4SLinus Torvalds set_blocksize(journal->j_dev_bd, super->s_blocksize); 2603bd4c625cSLinus Torvalds reiserfs_info(super, 2604bd4c625cSLinus Torvalds "journal_init_dev: journal device: %s\n", 260574f9f974SEdward Shishkin bdevname(journal->j_dev_bd, b)); 260686098fa0SChristoph Hellwig return 0; 26071da177e4SLinus Torvalds } 26081da177e4SLinus Torvalds 2609cf3d0b81SEdward Shishkin /** 2610cf3d0b81SEdward Shishkin * When creating/tuning a file system user can assign some 2611cf3d0b81SEdward Shishkin * journal params within boundaries which depend on the ratio 2612cf3d0b81SEdward Shishkin * blocksize/standard_blocksize. 2613cf3d0b81SEdward Shishkin * 2614cf3d0b81SEdward Shishkin * For blocks >= standard_blocksize transaction size should 2615cf3d0b81SEdward Shishkin * be not less then JOURNAL_TRANS_MIN_DEFAULT, and not more 2616cf3d0b81SEdward Shishkin * then JOURNAL_TRANS_MAX_DEFAULT. 2617cf3d0b81SEdward Shishkin * 2618cf3d0b81SEdward Shishkin * For blocks < standard_blocksize these boundaries should be 2619cf3d0b81SEdward Shishkin * decreased proportionally. 2620cf3d0b81SEdward Shishkin */ 2621cf3d0b81SEdward Shishkin #define REISERFS_STANDARD_BLKSIZE (4096) 2622cf3d0b81SEdward Shishkin 2623a9dd3643SJeff Mahoney static int check_advise_trans_params(struct super_block *sb, 2624cf3d0b81SEdward Shishkin struct reiserfs_journal *journal) 2625cf3d0b81SEdward Shishkin { 2626cf3d0b81SEdward Shishkin if (journal->j_trans_max) { 2627cf3d0b81SEdward Shishkin /* Non-default journal params. 2628cf3d0b81SEdward Shishkin Do sanity check for them. */ 2629cf3d0b81SEdward Shishkin int ratio = 1; 2630a9dd3643SJeff Mahoney if (sb->s_blocksize < REISERFS_STANDARD_BLKSIZE) 2631a9dd3643SJeff Mahoney ratio = REISERFS_STANDARD_BLKSIZE / sb->s_blocksize; 2632cf3d0b81SEdward Shishkin 2633cf3d0b81SEdward Shishkin if (journal->j_trans_max > JOURNAL_TRANS_MAX_DEFAULT / ratio || 2634cf3d0b81SEdward Shishkin journal->j_trans_max < JOURNAL_TRANS_MIN_DEFAULT / ratio || 2635a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb) / journal->j_trans_max < 2636cf3d0b81SEdward Shishkin JOURNAL_MIN_RATIO) { 2637a9dd3643SJeff Mahoney reiserfs_warning(sb, "sh-462", 263845b03d5eSJeff Mahoney "bad transaction max size (%u). " 263945b03d5eSJeff Mahoney "FSCK?", journal->j_trans_max); 2640cf3d0b81SEdward Shishkin return 1; 2641cf3d0b81SEdward Shishkin } 2642cf3d0b81SEdward Shishkin if (journal->j_max_batch != (journal->j_trans_max) * 2643cf3d0b81SEdward Shishkin JOURNAL_MAX_BATCH_DEFAULT/JOURNAL_TRANS_MAX_DEFAULT) { 2644a9dd3643SJeff Mahoney reiserfs_warning(sb, "sh-463", 264545b03d5eSJeff Mahoney "bad transaction max batch (%u). " 264645b03d5eSJeff Mahoney "FSCK?", journal->j_max_batch); 2647cf3d0b81SEdward Shishkin return 1; 2648cf3d0b81SEdward Shishkin } 2649cf3d0b81SEdward Shishkin } else { 2650cf3d0b81SEdward Shishkin /* Default journal params. 2651cf3d0b81SEdward Shishkin The file system was created by old version 2652cf3d0b81SEdward Shishkin of mkreiserfs, so some fields contain zeros, 2653cf3d0b81SEdward Shishkin and we need to advise proper values for them */ 2654a9dd3643SJeff Mahoney if (sb->s_blocksize != REISERFS_STANDARD_BLKSIZE) { 2655a9dd3643SJeff Mahoney reiserfs_warning(sb, "sh-464", "bad blocksize (%u)", 2656a9dd3643SJeff Mahoney sb->s_blocksize); 265745b03d5eSJeff Mahoney return 1; 265845b03d5eSJeff Mahoney } 2659cf3d0b81SEdward Shishkin journal->j_trans_max = JOURNAL_TRANS_MAX_DEFAULT; 2660cf3d0b81SEdward Shishkin journal->j_max_batch = JOURNAL_MAX_BATCH_DEFAULT; 2661cf3d0b81SEdward Shishkin journal->j_max_commit_age = JOURNAL_MAX_COMMIT_AGE; 2662cf3d0b81SEdward Shishkin } 2663cf3d0b81SEdward Shishkin return 0; 2664cf3d0b81SEdward Shishkin } 2665cf3d0b81SEdward Shishkin 26661da177e4SLinus Torvalds /* 26671da177e4SLinus Torvalds ** must be called once on fs mount. calls journal_read for you 26681da177e4SLinus Torvalds */ 2669a9dd3643SJeff Mahoney int journal_init(struct super_block *sb, const char *j_dev_name, 2670bd4c625cSLinus Torvalds int old_format, unsigned int commit_max_age) 2671bd4c625cSLinus Torvalds { 2672a9dd3643SJeff Mahoney int num_cnodes = SB_ONDISK_JOURNAL_SIZE(sb) * 2; 26731da177e4SLinus Torvalds struct buffer_head *bhjh; 26741da177e4SLinus Torvalds struct reiserfs_super_block *rs; 26751da177e4SLinus Torvalds struct reiserfs_journal_header *jh; 26761da177e4SLinus Torvalds struct reiserfs_journal *journal; 26771da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 26781da177e4SLinus Torvalds char b[BDEVNAME_SIZE]; 267998ea3f50SFrederic Weisbecker int ret; 26801da177e4SLinus Torvalds 2681558feb08SJoe Perches journal = SB_JOURNAL(sb) = vzalloc(sizeof(struct reiserfs_journal)); 26821da177e4SLinus Torvalds if (!journal) { 2683a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1256", 268445b03d5eSJeff Mahoney "unable to get memory for journal structure"); 26851da177e4SLinus Torvalds return 1; 26861da177e4SLinus Torvalds } 26871da177e4SLinus Torvalds INIT_LIST_HEAD(&journal->j_bitmap_nodes); 26881da177e4SLinus Torvalds INIT_LIST_HEAD(&journal->j_prealloc_list); 26891da177e4SLinus Torvalds INIT_LIST_HEAD(&journal->j_working_list); 26901da177e4SLinus Torvalds INIT_LIST_HEAD(&journal->j_journal_list); 26911da177e4SLinus Torvalds journal->j_persistent_trans = 0; 269237c69b98SFrederic Weisbecker if (reiserfs_allocate_list_bitmaps(sb, journal->j_list_bitmap, 269337c69b98SFrederic Weisbecker reiserfs_bmap_count(sb))) 26941da177e4SLinus Torvalds goto free_and_return; 269598ea3f50SFrederic Weisbecker 2696a9dd3643SJeff Mahoney allocate_bitmap_nodes(sb); 26971da177e4SLinus Torvalds 26981da177e4SLinus Torvalds /* reserved for journal area support */ 2699a9dd3643SJeff Mahoney SB_JOURNAL_1st_RESERVED_BLOCK(sb) = (old_format ? 2700bd4c625cSLinus Torvalds REISERFS_OLD_DISK_OFFSET_IN_BYTES 2701a9dd3643SJeff Mahoney / sb->s_blocksize + 2702a9dd3643SJeff Mahoney reiserfs_bmap_count(sb) + 2703bd4c625cSLinus Torvalds 1 : 2704bd4c625cSLinus Torvalds REISERFS_DISK_OFFSET_IN_BYTES / 2705a9dd3643SJeff Mahoney sb->s_blocksize + 2); 27061da177e4SLinus Torvalds 270725985edcSLucas De Marchi /* Sanity check to see is the standard journal fitting within first bitmap 27081da177e4SLinus Torvalds (actual for small blocksizes) */ 2709a9dd3643SJeff Mahoney if (!SB_ONDISK_JOURNAL_DEVICE(sb) && 2710a9dd3643SJeff Mahoney (SB_JOURNAL_1st_RESERVED_BLOCK(sb) + 2711a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb) > sb->s_blocksize * 8)) { 2712a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1393", 271345b03d5eSJeff Mahoney "journal does not fit for area addressed " 271445b03d5eSJeff Mahoney "by first of bitmap blocks. It starts at " 27151da177e4SLinus Torvalds "%u and its size is %u. Block size %ld", 2716a9dd3643SJeff Mahoney SB_JOURNAL_1st_RESERVED_BLOCK(sb), 2717a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb), 2718a9dd3643SJeff Mahoney sb->s_blocksize); 27191da177e4SLinus Torvalds goto free_and_return; 27201da177e4SLinus Torvalds } 27211da177e4SLinus Torvalds 2722a9dd3643SJeff Mahoney if (journal_init_dev(sb, journal, j_dev_name) != 0) { 2723a9dd3643SJeff Mahoney reiserfs_warning(sb, "sh-462", 272445b03d5eSJeff Mahoney "unable to initialize jornal device"); 27251da177e4SLinus Torvalds goto free_and_return; 27261da177e4SLinus Torvalds } 27271da177e4SLinus Torvalds 2728a9dd3643SJeff Mahoney rs = SB_DISK_SUPER_BLOCK(sb); 27291da177e4SLinus Torvalds 27301da177e4SLinus Torvalds /* read journal header */ 2731a9dd3643SJeff Mahoney bhjh = journal_bread(sb, 2732a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2733a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb)); 27341da177e4SLinus Torvalds if (!bhjh) { 2735a9dd3643SJeff Mahoney reiserfs_warning(sb, "sh-459", 273645b03d5eSJeff Mahoney "unable to read journal header"); 27371da177e4SLinus Torvalds goto free_and_return; 27381da177e4SLinus Torvalds } 27391da177e4SLinus Torvalds jh = (struct reiserfs_journal_header *)(bhjh->b_data); 27401da177e4SLinus Torvalds 27411da177e4SLinus Torvalds /* make sure that journal matches to the super block */ 2742bd4c625cSLinus Torvalds if (is_reiserfs_jr(rs) 2743bd4c625cSLinus Torvalds && (le32_to_cpu(jh->jh_journal.jp_journal_magic) != 2744bd4c625cSLinus Torvalds sb_jp_journal_magic(rs))) { 2745a9dd3643SJeff Mahoney reiserfs_warning(sb, "sh-460", 274645b03d5eSJeff Mahoney "journal header magic %x (device %s) does " 274745b03d5eSJeff Mahoney "not match to magic found in super block %x", 274845b03d5eSJeff Mahoney jh->jh_journal.jp_journal_magic, 27491da177e4SLinus Torvalds bdevname(journal->j_dev_bd, b), 27501da177e4SLinus Torvalds sb_jp_journal_magic(rs)); 27511da177e4SLinus Torvalds brelse(bhjh); 27521da177e4SLinus Torvalds goto free_and_return; 27531da177e4SLinus Torvalds } 27541da177e4SLinus Torvalds 27551da177e4SLinus Torvalds journal->j_trans_max = le32_to_cpu(jh->jh_journal.jp_journal_trans_max); 27561da177e4SLinus Torvalds journal->j_max_batch = le32_to_cpu(jh->jh_journal.jp_journal_max_batch); 2757bd4c625cSLinus Torvalds journal->j_max_commit_age = 2758bd4c625cSLinus Torvalds le32_to_cpu(jh->jh_journal.jp_journal_max_commit_age); 27591da177e4SLinus Torvalds journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; 27601da177e4SLinus Torvalds 2761a9dd3643SJeff Mahoney if (check_advise_trans_params(sb, journal) != 0) 2762cf3d0b81SEdward Shishkin goto free_and_return; 27631da177e4SLinus Torvalds journal->j_default_max_commit_age = journal->j_max_commit_age; 27641da177e4SLinus Torvalds 27651da177e4SLinus Torvalds if (commit_max_age != 0) { 27661da177e4SLinus Torvalds journal->j_max_commit_age = commit_max_age; 27671da177e4SLinus Torvalds journal->j_max_trans_age = commit_max_age; 27681da177e4SLinus Torvalds } 27691da177e4SLinus Torvalds 2770a9dd3643SJeff Mahoney reiserfs_info(sb, "journal params: device %s, size %u, " 27711da177e4SLinus Torvalds "journal first block %u, max trans len %u, max batch %u, " 27721da177e4SLinus Torvalds "max commit age %u, max trans age %u\n", 27731da177e4SLinus Torvalds bdevname(journal->j_dev_bd, b), 2774a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb), 2775a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb), 27761da177e4SLinus Torvalds journal->j_trans_max, 27771da177e4SLinus Torvalds journal->j_max_batch, 2778bd4c625cSLinus Torvalds journal->j_max_commit_age, journal->j_max_trans_age); 27791da177e4SLinus Torvalds 27801da177e4SLinus Torvalds brelse(bhjh); 27811da177e4SLinus Torvalds 27821da177e4SLinus Torvalds journal->j_list_bitmap_index = 0; 2783a9dd3643SJeff Mahoney journal_list_init(sb); 27841da177e4SLinus Torvalds 2785bd4c625cSLinus Torvalds memset(journal->j_list_hash_table, 0, 2786bd4c625cSLinus Torvalds JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)); 27871da177e4SLinus Torvalds 27881da177e4SLinus Torvalds INIT_LIST_HEAD(&journal->j_dirty_buffers); 27891da177e4SLinus Torvalds spin_lock_init(&journal->j_dirty_buffers_lock); 27901da177e4SLinus Torvalds 27911da177e4SLinus Torvalds journal->j_start = 0; 27921da177e4SLinus Torvalds journal->j_len = 0; 27931da177e4SLinus Torvalds journal->j_len_alloc = 0; 27941da177e4SLinus Torvalds atomic_set(&(journal->j_wcount), 0); 27951da177e4SLinus Torvalds atomic_set(&(journal->j_async_throttle), 0); 27961da177e4SLinus Torvalds journal->j_bcount = 0; 27971da177e4SLinus Torvalds journal->j_trans_start_time = 0; 27981da177e4SLinus Torvalds journal->j_last = NULL; 27991da177e4SLinus Torvalds journal->j_first = NULL; 28001da177e4SLinus Torvalds init_waitqueue_head(&(journal->j_join_wait)); 2801f68215c4SJeff Mahoney mutex_init(&journal->j_mutex); 2802afe70259SJeff Mahoney mutex_init(&journal->j_flush_mutex); 28031da177e4SLinus Torvalds 28041da177e4SLinus Torvalds journal->j_trans_id = 10; 28051da177e4SLinus Torvalds journal->j_mount_id = 10; 28061da177e4SLinus Torvalds journal->j_state = 0; 28071da177e4SLinus Torvalds atomic_set(&(journal->j_jlock), 0); 28081da177e4SLinus Torvalds journal->j_cnode_free_list = allocate_cnodes(num_cnodes); 28091da177e4SLinus Torvalds journal->j_cnode_free_orig = journal->j_cnode_free_list; 28101da177e4SLinus Torvalds journal->j_cnode_free = journal->j_cnode_free_list ? num_cnodes : 0; 28111da177e4SLinus Torvalds journal->j_cnode_used = 0; 28121da177e4SLinus Torvalds journal->j_must_wait = 0; 28131da177e4SLinus Torvalds 2814576f6d79SJeff Mahoney if (journal->j_cnode_free == 0) { 2815a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-2004", "Journal cnode memory " 2816576f6d79SJeff Mahoney "allocation failed (%ld bytes). Journal is " 2817576f6d79SJeff Mahoney "too large for available memory. Usually " 2818576f6d79SJeff Mahoney "this is due to a journal that is too large.", 2819576f6d79SJeff Mahoney sizeof (struct reiserfs_journal_cnode) * num_cnodes); 2820576f6d79SJeff Mahoney goto free_and_return; 2821576f6d79SJeff Mahoney } 2822576f6d79SJeff Mahoney 2823a9dd3643SJeff Mahoney init_journal_hash(sb); 28241da177e4SLinus Torvalds jl = journal->j_current_jl; 282537c69b98SFrederic Weisbecker 282637c69b98SFrederic Weisbecker /* 282737c69b98SFrederic Weisbecker * get_list_bitmap() may call flush_commit_list() which 282837c69b98SFrederic Weisbecker * requires the lock. Calling flush_commit_list() shouldn't happen 282937c69b98SFrederic Weisbecker * this early but I like to be paranoid. 283037c69b98SFrederic Weisbecker */ 283137c69b98SFrederic Weisbecker reiserfs_write_lock(sb); 2832a9dd3643SJeff Mahoney jl->j_list_bitmap = get_list_bitmap(sb, jl); 283337c69b98SFrederic Weisbecker reiserfs_write_unlock(sb); 28341da177e4SLinus Torvalds if (!jl->j_list_bitmap) { 2835a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-2005", 283645b03d5eSJeff Mahoney "get_list_bitmap failed for journal list 0"); 28371da177e4SLinus Torvalds goto free_and_return; 28381da177e4SLinus Torvalds } 283937c69b98SFrederic Weisbecker 284037c69b98SFrederic Weisbecker /* 284137c69b98SFrederic Weisbecker * Journal_read needs to be inspected in order to push down 284237c69b98SFrederic Weisbecker * the lock further inside (or even remove it). 284337c69b98SFrederic Weisbecker */ 284437c69b98SFrederic Weisbecker reiserfs_write_lock(sb); 284537c69b98SFrederic Weisbecker ret = journal_read(sb); 284637c69b98SFrederic Weisbecker reiserfs_write_unlock(sb); 284737c69b98SFrederic Weisbecker if (ret < 0) { 2848a9dd3643SJeff Mahoney reiserfs_warning(sb, "reiserfs-2006", 284945b03d5eSJeff Mahoney "Replay Failure, unable to mount"); 28501da177e4SLinus Torvalds goto free_and_return; 28511da177e4SLinus Torvalds } 28521da177e4SLinus Torvalds 28531da177e4SLinus Torvalds reiserfs_mounted_fs_count++; 285437c69b98SFrederic Weisbecker if (reiserfs_mounted_fs_count <= 1) 285528aadf51STejun Heo commit_wq = alloc_workqueue("reiserfs", WQ_MEM_RECLAIM, 0); 28561da177e4SLinus Torvalds 2857c4028958SDavid Howells INIT_DELAYED_WORK(&journal->j_work, flush_async_commits); 2858a9dd3643SJeff Mahoney journal->j_work_sb = sb; 28591da177e4SLinus Torvalds return 0; 28601da177e4SLinus Torvalds free_and_return: 2861a9dd3643SJeff Mahoney free_journal_ram(sb); 28621da177e4SLinus Torvalds return 1; 28631da177e4SLinus Torvalds } 28641da177e4SLinus Torvalds 28651da177e4SLinus Torvalds /* 28661da177e4SLinus Torvalds ** test for a polite end of the current transaction. Used by file_write, and should 28671da177e4SLinus Torvalds ** be used by delete to make sure they don't write more than can fit inside a single 28681da177e4SLinus Torvalds ** transaction 28691da177e4SLinus Torvalds */ 2870bd4c625cSLinus Torvalds int journal_transaction_should_end(struct reiserfs_transaction_handle *th, 2871bd4c625cSLinus Torvalds int new_alloc) 2872bd4c625cSLinus Torvalds { 28731da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(th->t_super); 28741da177e4SLinus Torvalds time_t now = get_seconds(); 28751da177e4SLinus Torvalds /* cannot restart while nested */ 28761da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 28771da177e4SLinus Torvalds if (th->t_refcount > 1) 28781da177e4SLinus Torvalds return 0; 28791da177e4SLinus Torvalds if (journal->j_must_wait > 0 || 28801da177e4SLinus Torvalds (journal->j_len_alloc + new_alloc) >= journal->j_max_batch || 28811da177e4SLinus Torvalds atomic_read(&(journal->j_jlock)) || 28821da177e4SLinus Torvalds (now - journal->j_trans_start_time) > journal->j_max_trans_age || 28831da177e4SLinus Torvalds journal->j_cnode_free < (journal->j_trans_max * 3)) { 28841da177e4SLinus Torvalds return 1; 28851da177e4SLinus Torvalds } 2886b18c1c6eSDavidlohr Bueso 28876ae1ea44SChris Mason journal->j_len_alloc += new_alloc; 28886ae1ea44SChris Mason th->t_blocks_allocated += new_alloc ; 28891da177e4SLinus Torvalds return 0; 28901da177e4SLinus Torvalds } 28911da177e4SLinus Torvalds 2892b18c1c6eSDavidlohr Bueso /* this must be called inside a transaction 28931da177e4SLinus Torvalds */ 2894bd4c625cSLinus Torvalds void reiserfs_block_writes(struct reiserfs_transaction_handle *th) 2895bd4c625cSLinus Torvalds { 28961da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(th->t_super); 28971da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 28981da177e4SLinus Torvalds journal->j_must_wait = 1; 28991da177e4SLinus Torvalds set_bit(J_WRITERS_BLOCKED, &journal->j_state); 29001da177e4SLinus Torvalds return; 29011da177e4SLinus Torvalds } 29021da177e4SLinus Torvalds 2903b18c1c6eSDavidlohr Bueso /* this must be called without a transaction started 29041da177e4SLinus Torvalds */ 2905bd4c625cSLinus Torvalds void reiserfs_allow_writes(struct super_block *s) 2906bd4c625cSLinus Torvalds { 29071da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 29081da177e4SLinus Torvalds clear_bit(J_WRITERS_BLOCKED, &journal->j_state); 29091da177e4SLinus Torvalds wake_up(&journal->j_join_wait); 29101da177e4SLinus Torvalds } 29111da177e4SLinus Torvalds 2912b18c1c6eSDavidlohr Bueso /* this must be called without a transaction started 29131da177e4SLinus Torvalds */ 2914bd4c625cSLinus Torvalds void reiserfs_wait_on_write_block(struct super_block *s) 2915bd4c625cSLinus Torvalds { 29161da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 29171da177e4SLinus Torvalds wait_event(journal->j_join_wait, 29181da177e4SLinus Torvalds !test_bit(J_WRITERS_BLOCKED, &journal->j_state)); 29191da177e4SLinus Torvalds } 29201da177e4SLinus Torvalds 2921bd4c625cSLinus Torvalds static void queue_log_writer(struct super_block *s) 2922bd4c625cSLinus Torvalds { 29231da177e4SLinus Torvalds wait_queue_t wait; 29241da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 29251da177e4SLinus Torvalds set_bit(J_WRITERS_QUEUED, &journal->j_state); 29261da177e4SLinus Torvalds 29271da177e4SLinus Torvalds /* 29281da177e4SLinus Torvalds * we don't want to use wait_event here because 29291da177e4SLinus Torvalds * we only want to wait once. 29301da177e4SLinus Torvalds */ 29311da177e4SLinus Torvalds init_waitqueue_entry(&wait, current); 29321da177e4SLinus Torvalds add_wait_queue(&journal->j_join_wait, &wait); 29331da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 29348ebc4232SFrederic Weisbecker if (test_bit(J_WRITERS_QUEUED, &journal->j_state)) { 29358ebc4232SFrederic Weisbecker reiserfs_write_unlock(s); 29361da177e4SLinus Torvalds schedule(); 29378ebc4232SFrederic Weisbecker reiserfs_write_lock(s); 29388ebc4232SFrederic Weisbecker } 29395ab2f7e0SMilind Arun Choudhary __set_current_state(TASK_RUNNING); 29401da177e4SLinus Torvalds remove_wait_queue(&journal->j_join_wait, &wait); 29411da177e4SLinus Torvalds } 29421da177e4SLinus Torvalds 2943bd4c625cSLinus Torvalds static void wake_queued_writers(struct super_block *s) 2944bd4c625cSLinus Torvalds { 29451da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 29461da177e4SLinus Torvalds if (test_and_clear_bit(J_WRITERS_QUEUED, &journal->j_state)) 29471da177e4SLinus Torvalds wake_up(&journal->j_join_wait); 29481da177e4SLinus Torvalds } 29491da177e4SLinus Torvalds 2950600ed416SJeff Mahoney static void let_transaction_grow(struct super_block *sb, unsigned int trans_id) 29511da177e4SLinus Torvalds { 29521da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(sb); 29531da177e4SLinus Torvalds unsigned long bcount = journal->j_bcount; 29541da177e4SLinus Torvalds while (1) { 29558ebc4232SFrederic Weisbecker reiserfs_write_unlock(sb); 2956041e0e3bSNishanth Aravamudan schedule_timeout_uninterruptible(1); 29578ebc4232SFrederic Weisbecker reiserfs_write_lock(sb); 29581da177e4SLinus Torvalds journal->j_current_jl->j_state |= LIST_COMMIT_PENDING; 29591da177e4SLinus Torvalds while ((atomic_read(&journal->j_wcount) > 0 || 29601da177e4SLinus Torvalds atomic_read(&journal->j_jlock)) && 29611da177e4SLinus Torvalds journal->j_trans_id == trans_id) { 29621da177e4SLinus Torvalds queue_log_writer(sb); 29631da177e4SLinus Torvalds } 29641da177e4SLinus Torvalds if (journal->j_trans_id != trans_id) 29651da177e4SLinus Torvalds break; 29661da177e4SLinus Torvalds if (bcount == journal->j_bcount) 29671da177e4SLinus Torvalds break; 29681da177e4SLinus Torvalds bcount = journal->j_bcount; 29691da177e4SLinus Torvalds } 29701da177e4SLinus Torvalds } 29711da177e4SLinus Torvalds 29721da177e4SLinus Torvalds /* join == true if you must join an existing transaction. 29731da177e4SLinus Torvalds ** join == false if you can deal with waiting for others to finish 29741da177e4SLinus Torvalds ** 29751da177e4SLinus Torvalds ** this will block until the transaction is joinable. send the number of blocks you 29761da177e4SLinus Torvalds ** expect to use in nblocks. 29771da177e4SLinus Torvalds */ 2978bd4c625cSLinus Torvalds static int do_journal_begin_r(struct reiserfs_transaction_handle *th, 2979a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks, 2980bd4c625cSLinus Torvalds int join) 2981bd4c625cSLinus Torvalds { 29821da177e4SLinus Torvalds time_t now = get_seconds(); 2983600ed416SJeff Mahoney unsigned int old_trans_id; 2984a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 29851da177e4SLinus Torvalds struct reiserfs_transaction_handle myth; 29861da177e4SLinus Torvalds int sched_count = 0; 29871da177e4SLinus Torvalds int retval; 29881da177e4SLinus Torvalds 2989a9dd3643SJeff Mahoney reiserfs_check_lock_depth(sb, "journal_begin"); 299014a61442SEric Sesterhenn BUG_ON(nblocks > journal->j_trans_max); 29911da177e4SLinus Torvalds 2992a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.journal_being); 29931da177e4SLinus Torvalds /* set here for journal_join */ 29941da177e4SLinus Torvalds th->t_refcount = 1; 2995a9dd3643SJeff Mahoney th->t_super = sb; 29961da177e4SLinus Torvalds 29971da177e4SLinus Torvalds relock: 2998a9dd3643SJeff Mahoney lock_journal(sb); 29991da177e4SLinus Torvalds if (join != JBEGIN_ABORT && reiserfs_is_journal_aborted(journal)) { 3000a9dd3643SJeff Mahoney unlock_journal(sb); 30011da177e4SLinus Torvalds retval = journal->j_errno; 30021da177e4SLinus Torvalds goto out_fail; 30031da177e4SLinus Torvalds } 30041da177e4SLinus Torvalds journal->j_bcount++; 30051da177e4SLinus Torvalds 30061da177e4SLinus Torvalds if (test_bit(J_WRITERS_BLOCKED, &journal->j_state)) { 3007a9dd3643SJeff Mahoney unlock_journal(sb); 30088ebc4232SFrederic Weisbecker reiserfs_write_unlock(sb); 3009a9dd3643SJeff Mahoney reiserfs_wait_on_write_block(sb); 30108ebc4232SFrederic Weisbecker reiserfs_write_lock(sb); 3011a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.journal_relock_writers); 30121da177e4SLinus Torvalds goto relock; 30131da177e4SLinus Torvalds } 30141da177e4SLinus Torvalds now = get_seconds(); 30151da177e4SLinus Torvalds 30161da177e4SLinus Torvalds /* if there is no room in the journal OR 30171da177e4SLinus Torvalds ** if this transaction is too old, and we weren't called joinable, wait for it to finish before beginning 30181da177e4SLinus Torvalds ** we don't sleep if there aren't other writers 30191da177e4SLinus Torvalds */ 30201da177e4SLinus Torvalds 30211da177e4SLinus Torvalds if ((!join && journal->j_must_wait > 0) || 3022bd4c625cSLinus Torvalds (!join 3023bd4c625cSLinus Torvalds && (journal->j_len_alloc + nblocks + 2) >= journal->j_max_batch) 3024bd4c625cSLinus Torvalds || (!join && atomic_read(&journal->j_wcount) > 0 3025bd4c625cSLinus Torvalds && journal->j_trans_start_time > 0 3026bd4c625cSLinus Torvalds && (now - journal->j_trans_start_time) > 3027bd4c625cSLinus Torvalds journal->j_max_trans_age) || (!join 3028bd4c625cSLinus Torvalds && atomic_read(&journal->j_jlock)) 3029bd4c625cSLinus Torvalds || (!join && journal->j_cnode_free < (journal->j_trans_max * 3))) { 30301da177e4SLinus Torvalds 30311da177e4SLinus Torvalds old_trans_id = journal->j_trans_id; 3032a9dd3643SJeff Mahoney unlock_journal(sb); /* allow others to finish this transaction */ 30331da177e4SLinus Torvalds 30341da177e4SLinus Torvalds if (!join && (journal->j_len_alloc + nblocks + 2) >= 30351da177e4SLinus Torvalds journal->j_max_batch && 3036bd4c625cSLinus Torvalds ((journal->j_len + nblocks + 2) * 100) < 3037bd4c625cSLinus Torvalds (journal->j_len_alloc * 75)) { 30381da177e4SLinus Torvalds if (atomic_read(&journal->j_wcount) > 10) { 30391da177e4SLinus Torvalds sched_count++; 3040a9dd3643SJeff Mahoney queue_log_writer(sb); 30411da177e4SLinus Torvalds goto relock; 30421da177e4SLinus Torvalds } 30431da177e4SLinus Torvalds } 30441da177e4SLinus Torvalds /* don't mess with joining the transaction if all we have to do is 30451da177e4SLinus Torvalds * wait for someone else to do a commit 30461da177e4SLinus Torvalds */ 30471da177e4SLinus Torvalds if (atomic_read(&journal->j_jlock)) { 30481da177e4SLinus Torvalds while (journal->j_trans_id == old_trans_id && 30491da177e4SLinus Torvalds atomic_read(&journal->j_jlock)) { 3050a9dd3643SJeff Mahoney queue_log_writer(sb); 30511da177e4SLinus Torvalds } 30521da177e4SLinus Torvalds goto relock; 30531da177e4SLinus Torvalds } 3054a9dd3643SJeff Mahoney retval = journal_join(&myth, sb, 1); 30551da177e4SLinus Torvalds if (retval) 30561da177e4SLinus Torvalds goto out_fail; 30571da177e4SLinus Torvalds 30581da177e4SLinus Torvalds /* someone might have ended the transaction while we joined */ 30591da177e4SLinus Torvalds if (old_trans_id != journal->j_trans_id) { 3060a9dd3643SJeff Mahoney retval = do_journal_end(&myth, sb, 1, 0); 30611da177e4SLinus Torvalds } else { 3062a9dd3643SJeff Mahoney retval = do_journal_end(&myth, sb, 1, COMMIT_NOW); 30631da177e4SLinus Torvalds } 30641da177e4SLinus Torvalds 30651da177e4SLinus Torvalds if (retval) 30661da177e4SLinus Torvalds goto out_fail; 30671da177e4SLinus Torvalds 3068a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.journal_relock_wcount); 30691da177e4SLinus Torvalds goto relock; 30701da177e4SLinus Torvalds } 30711da177e4SLinus Torvalds /* we are the first writer, set trans_id */ 30721da177e4SLinus Torvalds if (journal->j_trans_start_time == 0) { 30731da177e4SLinus Torvalds journal->j_trans_start_time = get_seconds(); 30741da177e4SLinus Torvalds } 30751da177e4SLinus Torvalds atomic_inc(&(journal->j_wcount)); 30761da177e4SLinus Torvalds journal->j_len_alloc += nblocks; 30771da177e4SLinus Torvalds th->t_blocks_logged = 0; 30781da177e4SLinus Torvalds th->t_blocks_allocated = nblocks; 30791da177e4SLinus Torvalds th->t_trans_id = journal->j_trans_id; 3080a9dd3643SJeff Mahoney unlock_journal(sb); 30811da177e4SLinus Torvalds INIT_LIST_HEAD(&th->t_list); 30821da177e4SLinus Torvalds return 0; 30831da177e4SLinus Torvalds 30841da177e4SLinus Torvalds out_fail: 30851da177e4SLinus Torvalds memset(th, 0, sizeof(*th)); 30861da177e4SLinus Torvalds /* Re-set th->t_super, so we can properly keep track of how many 30871da177e4SLinus Torvalds * persistent transactions there are. We need to do this so if this 30881da177e4SLinus Torvalds * call is part of a failed restart_transaction, we can free it later */ 3089a9dd3643SJeff Mahoney th->t_super = sb; 30901da177e4SLinus Torvalds return retval; 30911da177e4SLinus Torvalds } 30921da177e4SLinus Torvalds 3093bd4c625cSLinus Torvalds struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct 3094bd4c625cSLinus Torvalds super_block 3095bd4c625cSLinus Torvalds *s, 3096bd4c625cSLinus Torvalds int nblocks) 3097bd4c625cSLinus Torvalds { 30981da177e4SLinus Torvalds int ret; 30991da177e4SLinus Torvalds struct reiserfs_transaction_handle *th; 31001da177e4SLinus Torvalds 31011da177e4SLinus Torvalds /* if we're nesting into an existing transaction. It will be 31021da177e4SLinus Torvalds ** persistent on its own 31031da177e4SLinus Torvalds */ 31041da177e4SLinus Torvalds if (reiserfs_transaction_running(s)) { 31051da177e4SLinus Torvalds th = current->journal_info; 31061da177e4SLinus Torvalds th->t_refcount++; 310714a61442SEric Sesterhenn BUG_ON(th->t_refcount < 2); 310814a61442SEric Sesterhenn 31091da177e4SLinus Torvalds return th; 31101da177e4SLinus Torvalds } 3111d739b42bSPekka Enberg th = kmalloc(sizeof(struct reiserfs_transaction_handle), GFP_NOFS); 31121da177e4SLinus Torvalds if (!th) 31131da177e4SLinus Torvalds return NULL; 31141da177e4SLinus Torvalds ret = journal_begin(th, s, nblocks); 31151da177e4SLinus Torvalds if (ret) { 3116d739b42bSPekka Enberg kfree(th); 31171da177e4SLinus Torvalds return NULL; 31181da177e4SLinus Torvalds } 31191da177e4SLinus Torvalds 31201da177e4SLinus Torvalds SB_JOURNAL(s)->j_persistent_trans++; 31211da177e4SLinus Torvalds return th; 31221da177e4SLinus Torvalds } 31231da177e4SLinus Torvalds 3124bd4c625cSLinus Torvalds int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *th) 3125bd4c625cSLinus Torvalds { 31261da177e4SLinus Torvalds struct super_block *s = th->t_super; 31271da177e4SLinus Torvalds int ret = 0; 31281da177e4SLinus Torvalds if (th->t_trans_id) 31291da177e4SLinus Torvalds ret = journal_end(th, th->t_super, th->t_blocks_allocated); 31301da177e4SLinus Torvalds else 31311da177e4SLinus Torvalds ret = -EIO; 31321da177e4SLinus Torvalds if (th->t_refcount == 0) { 31331da177e4SLinus Torvalds SB_JOURNAL(s)->j_persistent_trans--; 3134d739b42bSPekka Enberg kfree(th); 31351da177e4SLinus Torvalds } 31361da177e4SLinus Torvalds return ret; 31371da177e4SLinus Torvalds } 31381da177e4SLinus Torvalds 3139bd4c625cSLinus Torvalds static int journal_join(struct reiserfs_transaction_handle *th, 3140a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks) 3141bd4c625cSLinus Torvalds { 31421da177e4SLinus Torvalds struct reiserfs_transaction_handle *cur_th = current->journal_info; 31431da177e4SLinus Torvalds 31441da177e4SLinus Torvalds /* this keeps do_journal_end from NULLing out the current->journal_info 31451da177e4SLinus Torvalds ** pointer 31461da177e4SLinus Torvalds */ 31471da177e4SLinus Torvalds th->t_handle_save = cur_th; 314814a61442SEric Sesterhenn BUG_ON(cur_th && cur_th->t_refcount > 1); 3149a9dd3643SJeff Mahoney return do_journal_begin_r(th, sb, nblocks, JBEGIN_JOIN); 31501da177e4SLinus Torvalds } 31511da177e4SLinus Torvalds 3152bd4c625cSLinus Torvalds int journal_join_abort(struct reiserfs_transaction_handle *th, 3153a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks) 3154bd4c625cSLinus Torvalds { 31551da177e4SLinus Torvalds struct reiserfs_transaction_handle *cur_th = current->journal_info; 31561da177e4SLinus Torvalds 31571da177e4SLinus Torvalds /* this keeps do_journal_end from NULLing out the current->journal_info 31581da177e4SLinus Torvalds ** pointer 31591da177e4SLinus Torvalds */ 31601da177e4SLinus Torvalds th->t_handle_save = cur_th; 316114a61442SEric Sesterhenn BUG_ON(cur_th && cur_th->t_refcount > 1); 3162a9dd3643SJeff Mahoney return do_journal_begin_r(th, sb, nblocks, JBEGIN_ABORT); 31631da177e4SLinus Torvalds } 31641da177e4SLinus Torvalds 3165bd4c625cSLinus Torvalds int journal_begin(struct reiserfs_transaction_handle *th, 3166a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks) 3167bd4c625cSLinus Torvalds { 31681da177e4SLinus Torvalds struct reiserfs_transaction_handle *cur_th = current->journal_info; 31691da177e4SLinus Torvalds int ret; 31701da177e4SLinus Torvalds 31711da177e4SLinus Torvalds th->t_handle_save = NULL; 31721da177e4SLinus Torvalds if (cur_th) { 31731da177e4SLinus Torvalds /* we are nesting into the current transaction */ 3174a9dd3643SJeff Mahoney if (cur_th->t_super == sb) { 31751da177e4SLinus Torvalds BUG_ON(!cur_th->t_refcount); 31761da177e4SLinus Torvalds cur_th->t_refcount++; 31771da177e4SLinus Torvalds memcpy(th, cur_th, sizeof(*th)); 31781da177e4SLinus Torvalds if (th->t_refcount <= 1) 3179a9dd3643SJeff Mahoney reiserfs_warning(sb, "reiserfs-2005", 318045b03d5eSJeff Mahoney "BAD: refcount <= 1, but " 318145b03d5eSJeff Mahoney "journal_info != 0"); 31821da177e4SLinus Torvalds return 0; 31831da177e4SLinus Torvalds } else { 31841da177e4SLinus Torvalds /* we've ended up with a handle from a different filesystem. 31851da177e4SLinus Torvalds ** save it and restore on journal_end. This should never 31861da177e4SLinus Torvalds ** really happen... 31871da177e4SLinus Torvalds */ 3188a9dd3643SJeff Mahoney reiserfs_warning(sb, "clm-2100", 318945b03d5eSJeff Mahoney "nesting info a different FS"); 31901da177e4SLinus Torvalds th->t_handle_save = current->journal_info; 31911da177e4SLinus Torvalds current->journal_info = th; 31921da177e4SLinus Torvalds } 31931da177e4SLinus Torvalds } else { 31941da177e4SLinus Torvalds current->journal_info = th; 31951da177e4SLinus Torvalds } 3196a9dd3643SJeff Mahoney ret = do_journal_begin_r(th, sb, nblocks, JBEGIN_REG); 319714a61442SEric Sesterhenn BUG_ON(current->journal_info != th); 31981da177e4SLinus Torvalds 31991da177e4SLinus Torvalds /* I guess this boils down to being the reciprocal of clm-2100 above. 32001da177e4SLinus Torvalds * If do_journal_begin_r fails, we need to put it back, since journal_end 32011da177e4SLinus Torvalds * won't be called to do it. */ 32021da177e4SLinus Torvalds if (ret) 32031da177e4SLinus Torvalds current->journal_info = th->t_handle_save; 32041da177e4SLinus Torvalds else 32051da177e4SLinus Torvalds BUG_ON(!th->t_refcount); 32061da177e4SLinus Torvalds 32071da177e4SLinus Torvalds return ret; 32081da177e4SLinus Torvalds } 32091da177e4SLinus Torvalds 32101da177e4SLinus Torvalds /* 32111da177e4SLinus Torvalds ** puts bh into the current transaction. If it was already there, reorders removes the 32121da177e4SLinus Torvalds ** old pointers from the hash, and puts new ones in (to make sure replay happen in the right order). 32131da177e4SLinus Torvalds ** 32141da177e4SLinus Torvalds ** if it was dirty, cleans and files onto the clean list. I can't let it be dirty again until the 32151da177e4SLinus Torvalds ** transaction is committed. 32161da177e4SLinus Torvalds ** 32171da177e4SLinus Torvalds ** if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len. 32181da177e4SLinus Torvalds */ 3219bd4c625cSLinus Torvalds int journal_mark_dirty(struct reiserfs_transaction_handle *th, 3220a9dd3643SJeff Mahoney struct super_block *sb, struct buffer_head *bh) 3221bd4c625cSLinus Torvalds { 3222a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 32231da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn = NULL; 32241da177e4SLinus Torvalds int count_already_incd = 0; 32251da177e4SLinus Torvalds int prepared = 0; 32261da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 32271da177e4SLinus Torvalds 3228a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.mark_dirty); 32291da177e4SLinus Torvalds if (th->t_trans_id != journal->j_trans_id) { 3230c3a9c210SJeff Mahoney reiserfs_panic(th->t_super, "journal-1577", 3231c3a9c210SJeff Mahoney "handle trans id %ld != current trans id %ld", 32321da177e4SLinus Torvalds th->t_trans_id, journal->j_trans_id); 32331da177e4SLinus Torvalds } 32341da177e4SLinus Torvalds 3235a9dd3643SJeff Mahoney sb->s_dirt = 1; 32361da177e4SLinus Torvalds 32371da177e4SLinus Torvalds prepared = test_clear_buffer_journal_prepared(bh); 32381da177e4SLinus Torvalds clear_buffer_journal_restore_dirty(bh); 32391da177e4SLinus Torvalds /* already in this transaction, we are done */ 32401da177e4SLinus Torvalds if (buffer_journaled(bh)) { 3241a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.mark_dirty_already); 32421da177e4SLinus Torvalds return 0; 32431da177e4SLinus Torvalds } 32441da177e4SLinus Torvalds 32451da177e4SLinus Torvalds /* this must be turned into a panic instead of a warning. We can't allow 32461da177e4SLinus Torvalds ** a dirty or journal_dirty or locked buffer to be logged, as some changes 32471da177e4SLinus Torvalds ** could get to disk too early. NOT GOOD. 32481da177e4SLinus Torvalds */ 32491da177e4SLinus Torvalds if (!prepared || buffer_dirty(bh)) { 3250a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1777", 325145b03d5eSJeff Mahoney "buffer %llu bad state " 32521da177e4SLinus Torvalds "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT", 3253bd4c625cSLinus Torvalds (unsigned long long)bh->b_blocknr, 3254bd4c625cSLinus Torvalds prepared ? ' ' : '!', 32551da177e4SLinus Torvalds buffer_locked(bh) ? ' ' : '!', 32561da177e4SLinus Torvalds buffer_dirty(bh) ? ' ' : '!', 32571da177e4SLinus Torvalds buffer_journal_dirty(bh) ? ' ' : '!'); 32581da177e4SLinus Torvalds } 32591da177e4SLinus Torvalds 32601da177e4SLinus Torvalds if (atomic_read(&(journal->j_wcount)) <= 0) { 3261a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1409", 326245b03d5eSJeff Mahoney "returning because j_wcount was %d", 3263bd4c625cSLinus Torvalds atomic_read(&(journal->j_wcount))); 32641da177e4SLinus Torvalds return 1; 32651da177e4SLinus Torvalds } 32661da177e4SLinus Torvalds /* this error means I've screwed up, and we've overflowed the transaction. 32671da177e4SLinus Torvalds ** Nothing can be done here, except make the FS readonly or panic. 32681da177e4SLinus Torvalds */ 32691da177e4SLinus Torvalds if (journal->j_len >= journal->j_trans_max) { 3270c3a9c210SJeff Mahoney reiserfs_panic(th->t_super, "journal-1413", 3271c3a9c210SJeff Mahoney "j_len (%lu) is too big", 3272bd4c625cSLinus Torvalds journal->j_len); 32731da177e4SLinus Torvalds } 32741da177e4SLinus Torvalds 32751da177e4SLinus Torvalds if (buffer_journal_dirty(bh)) { 32761da177e4SLinus Torvalds count_already_incd = 1; 3277a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.mark_dirty_notjournal); 32781da177e4SLinus Torvalds clear_buffer_journal_dirty(bh); 32791da177e4SLinus Torvalds } 32801da177e4SLinus Torvalds 32811da177e4SLinus Torvalds if (journal->j_len > journal->j_len_alloc) { 32821da177e4SLinus Torvalds journal->j_len_alloc = journal->j_len + JOURNAL_PER_BALANCE_CNT; 32831da177e4SLinus Torvalds } 32841da177e4SLinus Torvalds 32851da177e4SLinus Torvalds set_buffer_journaled(bh); 32861da177e4SLinus Torvalds 32871da177e4SLinus Torvalds /* now put this guy on the end */ 32881da177e4SLinus Torvalds if (!cn) { 3289a9dd3643SJeff Mahoney cn = get_cnode(sb); 32901da177e4SLinus Torvalds if (!cn) { 3291a9dd3643SJeff Mahoney reiserfs_panic(sb, "journal-4", "get_cnode failed!"); 32921da177e4SLinus Torvalds } 32931da177e4SLinus Torvalds 32941da177e4SLinus Torvalds if (th->t_blocks_logged == th->t_blocks_allocated) { 32951da177e4SLinus Torvalds th->t_blocks_allocated += JOURNAL_PER_BALANCE_CNT; 32961da177e4SLinus Torvalds journal->j_len_alloc += JOURNAL_PER_BALANCE_CNT; 32971da177e4SLinus Torvalds } 32981da177e4SLinus Torvalds th->t_blocks_logged++; 32991da177e4SLinus Torvalds journal->j_len++; 33001da177e4SLinus Torvalds 33011da177e4SLinus Torvalds cn->bh = bh; 33021da177e4SLinus Torvalds cn->blocknr = bh->b_blocknr; 3303a9dd3643SJeff Mahoney cn->sb = sb; 33041da177e4SLinus Torvalds cn->jlist = NULL; 33051da177e4SLinus Torvalds insert_journal_hash(journal->j_hash_table, cn); 33061da177e4SLinus Torvalds if (!count_already_incd) { 33071da177e4SLinus Torvalds get_bh(bh); 33081da177e4SLinus Torvalds } 33091da177e4SLinus Torvalds } 33101da177e4SLinus Torvalds cn->next = NULL; 33111da177e4SLinus Torvalds cn->prev = journal->j_last; 33121da177e4SLinus Torvalds cn->bh = bh; 33131da177e4SLinus Torvalds if (journal->j_last) { 33141da177e4SLinus Torvalds journal->j_last->next = cn; 33151da177e4SLinus Torvalds journal->j_last = cn; 33161da177e4SLinus Torvalds } else { 33171da177e4SLinus Torvalds journal->j_first = cn; 33181da177e4SLinus Torvalds journal->j_last = cn; 33191da177e4SLinus Torvalds } 33201da177e4SLinus Torvalds return 0; 33211da177e4SLinus Torvalds } 33221da177e4SLinus Torvalds 3323bd4c625cSLinus Torvalds int journal_end(struct reiserfs_transaction_handle *th, 3324a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks) 3325bd4c625cSLinus Torvalds { 33261da177e4SLinus Torvalds if (!current->journal_info && th->t_refcount > 1) 3327a9dd3643SJeff Mahoney reiserfs_warning(sb, "REISER-NESTING", 332845b03d5eSJeff Mahoney "th NULL, refcount %d", th->t_refcount); 33291da177e4SLinus Torvalds 33301da177e4SLinus Torvalds if (!th->t_trans_id) { 33311da177e4SLinus Torvalds WARN_ON(1); 33321da177e4SLinus Torvalds return -EIO; 33331da177e4SLinus Torvalds } 33341da177e4SLinus Torvalds 33351da177e4SLinus Torvalds th->t_refcount--; 33361da177e4SLinus Torvalds if (th->t_refcount > 0) { 3337bd4c625cSLinus Torvalds struct reiserfs_transaction_handle *cur_th = 3338bd4c625cSLinus Torvalds current->journal_info; 33391da177e4SLinus Torvalds 33401da177e4SLinus Torvalds /* we aren't allowed to close a nested transaction on a different 33411da177e4SLinus Torvalds ** filesystem from the one in the task struct 33421da177e4SLinus Torvalds */ 334314a61442SEric Sesterhenn BUG_ON(cur_th->t_super != th->t_super); 33441da177e4SLinus Torvalds 33451da177e4SLinus Torvalds if (th != cur_th) { 33461da177e4SLinus Torvalds memcpy(current->journal_info, th, sizeof(*th)); 33471da177e4SLinus Torvalds th->t_trans_id = 0; 33481da177e4SLinus Torvalds } 33491da177e4SLinus Torvalds return 0; 33501da177e4SLinus Torvalds } else { 3351a9dd3643SJeff Mahoney return do_journal_end(th, sb, nblocks, 0); 33521da177e4SLinus Torvalds } 33531da177e4SLinus Torvalds } 33541da177e4SLinus Torvalds 33551da177e4SLinus Torvalds /* removes from the current transaction, relsing and descrementing any counters. 33561da177e4SLinus Torvalds ** also files the removed buffer directly onto the clean list 33571da177e4SLinus Torvalds ** 33581da177e4SLinus Torvalds ** called by journal_mark_freed when a block has been deleted 33591da177e4SLinus Torvalds ** 33601da177e4SLinus Torvalds ** returns 1 if it cleaned and relsed the buffer. 0 otherwise 33611da177e4SLinus Torvalds */ 3362a9dd3643SJeff Mahoney static int remove_from_transaction(struct super_block *sb, 3363bd4c625cSLinus Torvalds b_blocknr_t blocknr, int already_cleaned) 3364bd4c625cSLinus Torvalds { 33651da177e4SLinus Torvalds struct buffer_head *bh; 33661da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 3367a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 33681da177e4SLinus Torvalds int ret = 0; 33691da177e4SLinus Torvalds 3370a9dd3643SJeff Mahoney cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr); 33711da177e4SLinus Torvalds if (!cn || !cn->bh) { 33721da177e4SLinus Torvalds return ret; 33731da177e4SLinus Torvalds } 33741da177e4SLinus Torvalds bh = cn->bh; 33751da177e4SLinus Torvalds if (cn->prev) { 33761da177e4SLinus Torvalds cn->prev->next = cn->next; 33771da177e4SLinus Torvalds } 33781da177e4SLinus Torvalds if (cn->next) { 33791da177e4SLinus Torvalds cn->next->prev = cn->prev; 33801da177e4SLinus Torvalds } 33811da177e4SLinus Torvalds if (cn == journal->j_first) { 33821da177e4SLinus Torvalds journal->j_first = cn->next; 33831da177e4SLinus Torvalds } 33841da177e4SLinus Torvalds if (cn == journal->j_last) { 33851da177e4SLinus Torvalds journal->j_last = cn->prev; 33861da177e4SLinus Torvalds } 33871da177e4SLinus Torvalds if (bh) 3388a9dd3643SJeff Mahoney remove_journal_hash(sb, journal->j_hash_table, NULL, 3389bd4c625cSLinus Torvalds bh->b_blocknr, 0); 33901da177e4SLinus Torvalds clear_buffer_journaled(bh); /* don't log this one */ 33911da177e4SLinus Torvalds 33921da177e4SLinus Torvalds if (!already_cleaned) { 33931da177e4SLinus Torvalds clear_buffer_journal_dirty(bh); 33941da177e4SLinus Torvalds clear_buffer_dirty(bh); 33951da177e4SLinus Torvalds clear_buffer_journal_test(bh); 33961da177e4SLinus Torvalds put_bh(bh); 33971da177e4SLinus Torvalds if (atomic_read(&(bh->b_count)) < 0) { 3398a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1752", 339945b03d5eSJeff Mahoney "b_count < 0"); 34001da177e4SLinus Torvalds } 34011da177e4SLinus Torvalds ret = 1; 34021da177e4SLinus Torvalds } 34031da177e4SLinus Torvalds journal->j_len--; 34041da177e4SLinus Torvalds journal->j_len_alloc--; 3405a9dd3643SJeff Mahoney free_cnode(sb, cn); 34061da177e4SLinus Torvalds return ret; 34071da177e4SLinus Torvalds } 34081da177e4SLinus Torvalds 34091da177e4SLinus Torvalds /* 34101da177e4SLinus Torvalds ** for any cnode in a journal list, it can only be dirtied of all the 34110779bf2dSMatt LaPlante ** transactions that include it are committed to disk. 34121da177e4SLinus Torvalds ** this checks through each transaction, and returns 1 if you are allowed to dirty, 34131da177e4SLinus Torvalds ** and 0 if you aren't 34141da177e4SLinus Torvalds ** 34151da177e4SLinus Torvalds ** it is called by dirty_journal_list, which is called after flush_commit_list has gotten all the log 34161da177e4SLinus Torvalds ** blocks for a given transaction on disk 34171da177e4SLinus Torvalds ** 34181da177e4SLinus Torvalds */ 3419bd4c625cSLinus Torvalds static int can_dirty(struct reiserfs_journal_cnode *cn) 3420bd4c625cSLinus Torvalds { 34211da177e4SLinus Torvalds struct super_block *sb = cn->sb; 34221da177e4SLinus Torvalds b_blocknr_t blocknr = cn->blocknr; 34231da177e4SLinus Torvalds struct reiserfs_journal_cnode *cur = cn->hprev; 34241da177e4SLinus Torvalds int can_dirty = 1; 34251da177e4SLinus Torvalds 34261da177e4SLinus Torvalds /* first test hprev. These are all newer than cn, so any node here 34271da177e4SLinus Torvalds ** with the same block number and dev means this node can't be sent 34281da177e4SLinus Torvalds ** to disk right now. 34291da177e4SLinus Torvalds */ 34301da177e4SLinus Torvalds while (cur && can_dirty) { 34311da177e4SLinus Torvalds if (cur->jlist && cur->bh && cur->blocknr && cur->sb == sb && 34321da177e4SLinus Torvalds cur->blocknr == blocknr) { 34331da177e4SLinus Torvalds can_dirty = 0; 34341da177e4SLinus Torvalds } 34351da177e4SLinus Torvalds cur = cur->hprev; 34361da177e4SLinus Torvalds } 34371da177e4SLinus Torvalds /* then test hnext. These are all older than cn. As long as they 34381da177e4SLinus Torvalds ** are committed to the log, it is safe to write cn to disk 34391da177e4SLinus Torvalds */ 34401da177e4SLinus Torvalds cur = cn->hnext; 34411da177e4SLinus Torvalds while (cur && can_dirty) { 34421da177e4SLinus Torvalds if (cur->jlist && cur->jlist->j_len > 0 && 34431da177e4SLinus Torvalds atomic_read(&(cur->jlist->j_commit_left)) > 0 && cur->bh && 34441da177e4SLinus Torvalds cur->blocknr && cur->sb == sb && cur->blocknr == blocknr) { 34451da177e4SLinus Torvalds can_dirty = 0; 34461da177e4SLinus Torvalds } 34471da177e4SLinus Torvalds cur = cur->hnext; 34481da177e4SLinus Torvalds } 34491da177e4SLinus Torvalds return can_dirty; 34501da177e4SLinus Torvalds } 34511da177e4SLinus Torvalds 34521da177e4SLinus Torvalds /* syncs the commit blocks, but does not force the real buffers to disk 34530779bf2dSMatt LaPlante ** will wait until the current transaction is done/committed before returning 34541da177e4SLinus Torvalds */ 3455bd4c625cSLinus Torvalds int journal_end_sync(struct reiserfs_transaction_handle *th, 3456a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks) 3457bd4c625cSLinus Torvalds { 3458a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 34591da177e4SLinus Torvalds 34601da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 34611da177e4SLinus Torvalds /* you can sync while nested, very, very bad */ 346214a61442SEric Sesterhenn BUG_ON(th->t_refcount > 1); 34631da177e4SLinus Torvalds if (journal->j_len == 0) { 3464a9dd3643SJeff Mahoney reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), 3465bd4c625cSLinus Torvalds 1); 3466a9dd3643SJeff Mahoney journal_mark_dirty(th, sb, SB_BUFFER_WITH_SB(sb)); 34671da177e4SLinus Torvalds } 3468a9dd3643SJeff Mahoney return do_journal_end(th, sb, nblocks, COMMIT_NOW | WAIT); 34691da177e4SLinus Torvalds } 34701da177e4SLinus Torvalds 34711da177e4SLinus Torvalds /* 34721da177e4SLinus Torvalds ** writeback the pending async commits to disk 34731da177e4SLinus Torvalds */ 3474c4028958SDavid Howells static void flush_async_commits(struct work_struct *work) 3475bd4c625cSLinus Torvalds { 3476c4028958SDavid Howells struct reiserfs_journal *journal = 3477c4028958SDavid Howells container_of(work, struct reiserfs_journal, j_work.work); 3478a9dd3643SJeff Mahoney struct super_block *sb = journal->j_work_sb; 34791da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 34801da177e4SLinus Torvalds struct list_head *entry; 34811da177e4SLinus Torvalds 34828ebc4232SFrederic Weisbecker reiserfs_write_lock(sb); 34831da177e4SLinus Torvalds if (!list_empty(&journal->j_journal_list)) { 34841da177e4SLinus Torvalds /* last entry is the youngest, commit it and you get everything */ 34851da177e4SLinus Torvalds entry = journal->j_journal_list.prev; 34861da177e4SLinus Torvalds jl = JOURNAL_LIST_ENTRY(entry); 3487a9dd3643SJeff Mahoney flush_commit_list(sb, jl, 1); 34881da177e4SLinus Torvalds } 34898ebc4232SFrederic Weisbecker reiserfs_write_unlock(sb); 34901da177e4SLinus Torvalds } 34911da177e4SLinus Torvalds 34921da177e4SLinus Torvalds /* 34931da177e4SLinus Torvalds ** flushes any old transactions to disk 34941da177e4SLinus Torvalds ** ends the current transaction if it is too old 34951da177e4SLinus Torvalds */ 3496a9dd3643SJeff Mahoney int reiserfs_flush_old_commits(struct super_block *sb) 3497bd4c625cSLinus Torvalds { 34981da177e4SLinus Torvalds time_t now; 34991da177e4SLinus Torvalds struct reiserfs_transaction_handle th; 3500a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 35011da177e4SLinus Torvalds 35021da177e4SLinus Torvalds now = get_seconds(); 35031da177e4SLinus Torvalds /* safety check so we don't flush while we are replaying the log during 35041da177e4SLinus Torvalds * mount 35051da177e4SLinus Torvalds */ 35061da177e4SLinus Torvalds if (list_empty(&journal->j_journal_list)) { 35071da177e4SLinus Torvalds return 0; 35081da177e4SLinus Torvalds } 35091da177e4SLinus Torvalds 35101da177e4SLinus Torvalds /* check the current transaction. If there are no writers, and it is 35111da177e4SLinus Torvalds * too old, finish it, and force the commit blocks to disk 35121da177e4SLinus Torvalds */ 35131da177e4SLinus Torvalds if (atomic_read(&journal->j_wcount) <= 0 && 35141da177e4SLinus Torvalds journal->j_trans_start_time > 0 && 35151da177e4SLinus Torvalds journal->j_len > 0 && 3516bd4c625cSLinus Torvalds (now - journal->j_trans_start_time) > journal->j_max_trans_age) { 3517a9dd3643SJeff Mahoney if (!journal_join(&th, sb, 1)) { 3518a9dd3643SJeff Mahoney reiserfs_prepare_for_journal(sb, 3519a9dd3643SJeff Mahoney SB_BUFFER_WITH_SB(sb), 3520bd4c625cSLinus Torvalds 1); 3521a9dd3643SJeff Mahoney journal_mark_dirty(&th, sb, 3522a9dd3643SJeff Mahoney SB_BUFFER_WITH_SB(sb)); 35231da177e4SLinus Torvalds 35241da177e4SLinus Torvalds /* we're only being called from kreiserfsd, it makes no sense to do 35251da177e4SLinus Torvalds ** an async commit so that kreiserfsd can do it later 35261da177e4SLinus Torvalds */ 3527a9dd3643SJeff Mahoney do_journal_end(&th, sb, 1, COMMIT_NOW | WAIT); 35281da177e4SLinus Torvalds } 35291da177e4SLinus Torvalds } 3530a9dd3643SJeff Mahoney return sb->s_dirt; 35311da177e4SLinus Torvalds } 35321da177e4SLinus Torvalds 35331da177e4SLinus Torvalds /* 35341da177e4SLinus Torvalds ** returns 0 if do_journal_end should return right away, returns 1 if do_journal_end should finish the commit 35351da177e4SLinus Torvalds ** 35361da177e4SLinus Torvalds ** if the current transaction is too old, but still has writers, this will wait on j_join_wait until all 35371da177e4SLinus Torvalds ** the writers are done. By the time it wakes up, the transaction it was called has already ended, so it just 35381da177e4SLinus Torvalds ** flushes the commit list and returns 0. 35391da177e4SLinus Torvalds ** 35401da177e4SLinus Torvalds ** Won't batch when flush or commit_now is set. Also won't batch when others are waiting on j_join_wait. 35411da177e4SLinus Torvalds ** 35421da177e4SLinus Torvalds ** Note, we can't allow the journal_end to proceed while there are still writers in the log. 35431da177e4SLinus Torvalds */ 3544bd4c625cSLinus Torvalds static int check_journal_end(struct reiserfs_transaction_handle *th, 3545a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks, 3546bd4c625cSLinus Torvalds int flags) 3547bd4c625cSLinus Torvalds { 35481da177e4SLinus Torvalds 35491da177e4SLinus Torvalds time_t now; 35501da177e4SLinus Torvalds int flush = flags & FLUSH_ALL; 35511da177e4SLinus Torvalds int commit_now = flags & COMMIT_NOW; 35521da177e4SLinus Torvalds int wait_on_commit = flags & WAIT; 35531da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 3554a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 35551da177e4SLinus Torvalds 35561da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 35571da177e4SLinus Torvalds 35581da177e4SLinus Torvalds if (th->t_trans_id != journal->j_trans_id) { 3559c3a9c210SJeff Mahoney reiserfs_panic(th->t_super, "journal-1577", 3560c3a9c210SJeff Mahoney "handle trans id %ld != current trans id %ld", 35611da177e4SLinus Torvalds th->t_trans_id, journal->j_trans_id); 35621da177e4SLinus Torvalds } 35631da177e4SLinus Torvalds 35641da177e4SLinus Torvalds journal->j_len_alloc -= (th->t_blocks_allocated - th->t_blocks_logged); 35651da177e4SLinus Torvalds if (atomic_read(&(journal->j_wcount)) > 0) { /* <= 0 is allowed. unmounting might not call begin */ 35661da177e4SLinus Torvalds atomic_dec(&(journal->j_wcount)); 35671da177e4SLinus Torvalds } 35681da177e4SLinus Torvalds 35691da177e4SLinus Torvalds /* BUG, deal with case where j_len is 0, but people previously freed blocks need to be released 35701da177e4SLinus Torvalds ** will be dealt with by next transaction that actually writes something, but should be taken 35711da177e4SLinus Torvalds ** care of in this trans 35721da177e4SLinus Torvalds */ 357314a61442SEric Sesterhenn BUG_ON(journal->j_len == 0); 357414a61442SEric Sesterhenn 35751da177e4SLinus Torvalds /* if wcount > 0, and we are called to with flush or commit_now, 35761da177e4SLinus Torvalds ** we wait on j_join_wait. We will wake up when the last writer has 35771da177e4SLinus Torvalds ** finished the transaction, and started it on its way to the disk. 35781da177e4SLinus Torvalds ** Then, we flush the commit or journal list, and just return 0 35791da177e4SLinus Torvalds ** because the rest of journal end was already done for this transaction. 35801da177e4SLinus Torvalds */ 35811da177e4SLinus Torvalds if (atomic_read(&(journal->j_wcount)) > 0) { 35821da177e4SLinus Torvalds if (flush || commit_now) { 35831da177e4SLinus Torvalds unsigned trans_id; 35841da177e4SLinus Torvalds 35851da177e4SLinus Torvalds jl = journal->j_current_jl; 35861da177e4SLinus Torvalds trans_id = jl->j_trans_id; 35871da177e4SLinus Torvalds if (wait_on_commit) 35881da177e4SLinus Torvalds jl->j_state |= LIST_COMMIT_PENDING; 35891da177e4SLinus Torvalds atomic_set(&(journal->j_jlock), 1); 35901da177e4SLinus Torvalds if (flush) { 35911da177e4SLinus Torvalds journal->j_next_full_flush = 1; 35921da177e4SLinus Torvalds } 3593a9dd3643SJeff Mahoney unlock_journal(sb); 35941da177e4SLinus Torvalds 35951da177e4SLinus Torvalds /* sleep while the current transaction is still j_jlocked */ 35961da177e4SLinus Torvalds while (journal->j_trans_id == trans_id) { 35971da177e4SLinus Torvalds if (atomic_read(&journal->j_jlock)) { 3598a9dd3643SJeff Mahoney queue_log_writer(sb); 35991da177e4SLinus Torvalds } else { 3600a9dd3643SJeff Mahoney lock_journal(sb); 36011da177e4SLinus Torvalds if (journal->j_trans_id == trans_id) { 3602bd4c625cSLinus Torvalds atomic_set(&(journal->j_jlock), 3603bd4c625cSLinus Torvalds 1); 36041da177e4SLinus Torvalds } 3605a9dd3643SJeff Mahoney unlock_journal(sb); 36061da177e4SLinus Torvalds } 36071da177e4SLinus Torvalds } 360814a61442SEric Sesterhenn BUG_ON(journal->j_trans_id == trans_id); 360914a61442SEric Sesterhenn 3610bd4c625cSLinus Torvalds if (commit_now 3611a9dd3643SJeff Mahoney && journal_list_still_alive(sb, trans_id) 3612bd4c625cSLinus Torvalds && wait_on_commit) { 3613a9dd3643SJeff Mahoney flush_commit_list(sb, jl, 1); 36141da177e4SLinus Torvalds } 36151da177e4SLinus Torvalds return 0; 36161da177e4SLinus Torvalds } 3617a9dd3643SJeff Mahoney unlock_journal(sb); 36181da177e4SLinus Torvalds return 0; 36191da177e4SLinus Torvalds } 36201da177e4SLinus Torvalds 36211da177e4SLinus Torvalds /* deal with old transactions where we are the last writers */ 36221da177e4SLinus Torvalds now = get_seconds(); 36231da177e4SLinus Torvalds if ((now - journal->j_trans_start_time) > journal->j_max_trans_age) { 36241da177e4SLinus Torvalds commit_now = 1; 36251da177e4SLinus Torvalds journal->j_next_async_flush = 1; 36261da177e4SLinus Torvalds } 36271da177e4SLinus Torvalds /* don't batch when someone is waiting on j_join_wait */ 36281da177e4SLinus Torvalds /* don't batch when syncing the commit or flushing the whole trans */ 3629bd4c625cSLinus Torvalds if (!(journal->j_must_wait > 0) && !(atomic_read(&(journal->j_jlock))) 3630bd4c625cSLinus Torvalds && !flush && !commit_now && (journal->j_len < journal->j_max_batch) 3631bd4c625cSLinus Torvalds && journal->j_len_alloc < journal->j_max_batch 3632bd4c625cSLinus Torvalds && journal->j_cnode_free > (journal->j_trans_max * 3)) { 36331da177e4SLinus Torvalds journal->j_bcount++; 3634a9dd3643SJeff Mahoney unlock_journal(sb); 36351da177e4SLinus Torvalds return 0; 36361da177e4SLinus Torvalds } 36371da177e4SLinus Torvalds 3638a9dd3643SJeff Mahoney if (journal->j_start > SB_ONDISK_JOURNAL_SIZE(sb)) { 3639a9dd3643SJeff Mahoney reiserfs_panic(sb, "journal-003", 3640c3a9c210SJeff Mahoney "j_start (%ld) is too high", 3641bd4c625cSLinus Torvalds journal->j_start); 36421da177e4SLinus Torvalds } 36431da177e4SLinus Torvalds return 1; 36441da177e4SLinus Torvalds } 36451da177e4SLinus Torvalds 36461da177e4SLinus Torvalds /* 36471da177e4SLinus Torvalds ** Does all the work that makes deleting blocks safe. 36481da177e4SLinus Torvalds ** when deleting a block mark BH_JNew, just remove it from the current transaction, clean it's buffer_head and move on. 36491da177e4SLinus Torvalds ** 36501da177e4SLinus Torvalds ** otherwise: 36511da177e4SLinus Torvalds ** set a bit for the block in the journal bitmap. That will prevent it from being allocated for unformatted nodes 36521da177e4SLinus Torvalds ** before this transaction has finished. 36531da177e4SLinus Torvalds ** 36541da177e4SLinus Torvalds ** mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers. That will prevent any old transactions with 36551da177e4SLinus Torvalds ** this block from trying to flush to the real location. Since we aren't removing the cnode from the journal_list_hash, 36561da177e4SLinus Torvalds ** the block can't be reallocated yet. 36571da177e4SLinus Torvalds ** 36581da177e4SLinus Torvalds ** Then remove it from the current transaction, decrementing any counters and filing it on the clean list. 36591da177e4SLinus Torvalds */ 3660bd4c625cSLinus Torvalds int journal_mark_freed(struct reiserfs_transaction_handle *th, 3661a9dd3643SJeff Mahoney struct super_block *sb, b_blocknr_t blocknr) 3662bd4c625cSLinus Torvalds { 3663a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 36641da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn = NULL; 36651da177e4SLinus Torvalds struct buffer_head *bh = NULL; 36661da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb = NULL; 36671da177e4SLinus Torvalds int cleaned = 0; 36681da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 36691da177e4SLinus Torvalds 3670a9dd3643SJeff Mahoney cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr); 36711da177e4SLinus Torvalds if (cn && cn->bh) { 36721da177e4SLinus Torvalds bh = cn->bh; 36731da177e4SLinus Torvalds get_bh(bh); 36741da177e4SLinus Torvalds } 36751da177e4SLinus Torvalds /* if it is journal new, we just remove it from this transaction */ 36761da177e4SLinus Torvalds if (bh && buffer_journal_new(bh)) { 36771da177e4SLinus Torvalds clear_buffer_journal_new(bh); 36781da177e4SLinus Torvalds clear_prepared_bits(bh); 36791da177e4SLinus Torvalds reiserfs_clean_and_file_buffer(bh); 3680a9dd3643SJeff Mahoney cleaned = remove_from_transaction(sb, blocknr, cleaned); 36811da177e4SLinus Torvalds } else { 36821da177e4SLinus Torvalds /* set the bit for this block in the journal bitmap for this transaction */ 36831da177e4SLinus Torvalds jb = journal->j_current_jl->j_list_bitmap; 36841da177e4SLinus Torvalds if (!jb) { 3685a9dd3643SJeff Mahoney reiserfs_panic(sb, "journal-1702", 3686c3a9c210SJeff Mahoney "journal_list_bitmap is NULL"); 36871da177e4SLinus Torvalds } 3688a9dd3643SJeff Mahoney set_bit_in_list_bitmap(sb, blocknr, jb); 36891da177e4SLinus Torvalds 36901da177e4SLinus Torvalds /* Note, the entire while loop is not allowed to schedule. */ 36911da177e4SLinus Torvalds 36921da177e4SLinus Torvalds if (bh) { 36931da177e4SLinus Torvalds clear_prepared_bits(bh); 36941da177e4SLinus Torvalds reiserfs_clean_and_file_buffer(bh); 36951da177e4SLinus Torvalds } 3696a9dd3643SJeff Mahoney cleaned = remove_from_transaction(sb, blocknr, cleaned); 36971da177e4SLinus Torvalds 36981da177e4SLinus Torvalds /* find all older transactions with this block, make sure they don't try to write it out */ 3699a9dd3643SJeff Mahoney cn = get_journal_hash_dev(sb, journal->j_list_hash_table, 3700bd4c625cSLinus Torvalds blocknr); 37011da177e4SLinus Torvalds while (cn) { 3702a9dd3643SJeff Mahoney if (sb == cn->sb && blocknr == cn->blocknr) { 37031da177e4SLinus Torvalds set_bit(BLOCK_FREED, &cn->state); 37041da177e4SLinus Torvalds if (cn->bh) { 37051da177e4SLinus Torvalds if (!cleaned) { 37061da177e4SLinus Torvalds /* remove_from_transaction will brelse the buffer if it was 37071da177e4SLinus Torvalds ** in the current trans 37081da177e4SLinus Torvalds */ 3709bd4c625cSLinus Torvalds clear_buffer_journal_dirty(cn-> 3710bd4c625cSLinus Torvalds bh); 37111da177e4SLinus Torvalds clear_buffer_dirty(cn->bh); 3712bd4c625cSLinus Torvalds clear_buffer_journal_test(cn-> 3713bd4c625cSLinus Torvalds bh); 37141da177e4SLinus Torvalds cleaned = 1; 37151da177e4SLinus Torvalds put_bh(cn->bh); 3716bd4c625cSLinus Torvalds if (atomic_read 3717bd4c625cSLinus Torvalds (&(cn->bh->b_count)) < 0) { 3718a9dd3643SJeff Mahoney reiserfs_warning(sb, 371945b03d5eSJeff Mahoney "journal-2138", 372045b03d5eSJeff Mahoney "cn->bh->b_count < 0"); 37211da177e4SLinus Torvalds } 37221da177e4SLinus Torvalds } 37231da177e4SLinus Torvalds if (cn->jlist) { /* since we are clearing the bh, we MUST dec nonzerolen */ 3724bd4c625cSLinus Torvalds atomic_dec(& 3725bd4c625cSLinus Torvalds (cn->jlist-> 3726bd4c625cSLinus Torvalds j_nonzerolen)); 37271da177e4SLinus Torvalds } 37281da177e4SLinus Torvalds cn->bh = NULL; 37291da177e4SLinus Torvalds } 37301da177e4SLinus Torvalds } 37311da177e4SLinus Torvalds cn = cn->hnext; 37321da177e4SLinus Torvalds } 37331da177e4SLinus Torvalds } 37341da177e4SLinus Torvalds 3735398c95bdSChris Mason if (bh) 3736398c95bdSChris Mason release_buffer_page(bh); /* get_hash grabs the buffer */ 37371da177e4SLinus Torvalds return 0; 37381da177e4SLinus Torvalds } 37391da177e4SLinus Torvalds 3740bd4c625cSLinus Torvalds void reiserfs_update_inode_transaction(struct inode *inode) 3741bd4c625cSLinus Torvalds { 37421da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(inode->i_sb); 37431da177e4SLinus Torvalds REISERFS_I(inode)->i_jl = journal->j_current_jl; 37441da177e4SLinus Torvalds REISERFS_I(inode)->i_trans_id = journal->j_trans_id; 37451da177e4SLinus Torvalds } 37461da177e4SLinus Torvalds 37471da177e4SLinus Torvalds /* 37481da177e4SLinus Torvalds * returns -1 on error, 0 if no commits/barriers were done and 1 37491da177e4SLinus Torvalds * if a transaction was actually committed and the barrier was done 37501da177e4SLinus Torvalds */ 37511da177e4SLinus Torvalds static int __commit_trans_jl(struct inode *inode, unsigned long id, 37521da177e4SLinus Torvalds struct reiserfs_journal_list *jl) 37531da177e4SLinus Torvalds { 37541da177e4SLinus Torvalds struct reiserfs_transaction_handle th; 37551da177e4SLinus Torvalds struct super_block *sb = inode->i_sb; 37561da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(sb); 37571da177e4SLinus Torvalds int ret = 0; 37581da177e4SLinus Torvalds 37591da177e4SLinus Torvalds /* is it from the current transaction, or from an unknown transaction? */ 37601da177e4SLinus Torvalds if (id == journal->j_trans_id) { 37611da177e4SLinus Torvalds jl = journal->j_current_jl; 37621da177e4SLinus Torvalds /* try to let other writers come in and grow this transaction */ 37631da177e4SLinus Torvalds let_transaction_grow(sb, id); 37641da177e4SLinus Torvalds if (journal->j_trans_id != id) { 37651da177e4SLinus Torvalds goto flush_commit_only; 37661da177e4SLinus Torvalds } 37671da177e4SLinus Torvalds 37681da177e4SLinus Torvalds ret = journal_begin(&th, sb, 1); 37691da177e4SLinus Torvalds if (ret) 37701da177e4SLinus Torvalds return ret; 37711da177e4SLinus Torvalds 37721da177e4SLinus Torvalds /* someone might have ended this transaction while we joined */ 37731da177e4SLinus Torvalds if (journal->j_trans_id != id) { 3774bd4c625cSLinus Torvalds reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), 3775bd4c625cSLinus Torvalds 1); 37761da177e4SLinus Torvalds journal_mark_dirty(&th, sb, SB_BUFFER_WITH_SB(sb)); 37771da177e4SLinus Torvalds ret = journal_end(&th, sb, 1); 37781da177e4SLinus Torvalds goto flush_commit_only; 37791da177e4SLinus Torvalds } 37801da177e4SLinus Torvalds 37811da177e4SLinus Torvalds ret = journal_end_sync(&th, sb, 1); 37821da177e4SLinus Torvalds if (!ret) 37831da177e4SLinus Torvalds ret = 1; 37841da177e4SLinus Torvalds 37851da177e4SLinus Torvalds } else { 37861da177e4SLinus Torvalds /* this gets tricky, we have to make sure the journal list in 37871da177e4SLinus Torvalds * the inode still exists. We know the list is still around 37881da177e4SLinus Torvalds * if we've got a larger transaction id than the oldest list 37891da177e4SLinus Torvalds */ 37901da177e4SLinus Torvalds flush_commit_only: 37911da177e4SLinus Torvalds if (journal_list_still_alive(inode->i_sb, id)) { 37921da177e4SLinus Torvalds /* 37931da177e4SLinus Torvalds * we only set ret to 1 when we know for sure 37941da177e4SLinus Torvalds * the barrier hasn't been started yet on the commit 37951da177e4SLinus Torvalds * block. 37961da177e4SLinus Torvalds */ 37971da177e4SLinus Torvalds if (atomic_read(&jl->j_commit_left) > 1) 37981da177e4SLinus Torvalds ret = 1; 37991da177e4SLinus Torvalds flush_commit_list(sb, jl, 1); 38001da177e4SLinus Torvalds if (journal->j_errno) 38011da177e4SLinus Torvalds ret = journal->j_errno; 38021da177e4SLinus Torvalds } 38031da177e4SLinus Torvalds } 38041da177e4SLinus Torvalds /* otherwise the list is gone, and long since committed */ 38051da177e4SLinus Torvalds return ret; 38061da177e4SLinus Torvalds } 38071da177e4SLinus Torvalds 3808bd4c625cSLinus Torvalds int reiserfs_commit_for_inode(struct inode *inode) 3809bd4c625cSLinus Torvalds { 3810600ed416SJeff Mahoney unsigned int id = REISERFS_I(inode)->i_trans_id; 38111da177e4SLinus Torvalds struct reiserfs_journal_list *jl = REISERFS_I(inode)->i_jl; 38121da177e4SLinus Torvalds 38131da177e4SLinus Torvalds /* for the whole inode, assume unset id means it was 38141da177e4SLinus Torvalds * changed in the current transaction. More conservative 38151da177e4SLinus Torvalds */ 38161da177e4SLinus Torvalds if (!id || !jl) { 38171da177e4SLinus Torvalds reiserfs_update_inode_transaction(inode); 38181da177e4SLinus Torvalds id = REISERFS_I(inode)->i_trans_id; 38191da177e4SLinus Torvalds /* jl will be updated in __commit_trans_jl */ 38201da177e4SLinus Torvalds } 38211da177e4SLinus Torvalds 38221da177e4SLinus Torvalds return __commit_trans_jl(inode, id, jl); 38231da177e4SLinus Torvalds } 38241da177e4SLinus Torvalds 3825a9dd3643SJeff Mahoney void reiserfs_restore_prepared_buffer(struct super_block *sb, 3826bd4c625cSLinus Torvalds struct buffer_head *bh) 3827bd4c625cSLinus Torvalds { 3828a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 3829a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.restore_prepared); 38301da177e4SLinus Torvalds if (!bh) { 38311da177e4SLinus Torvalds return; 38321da177e4SLinus Torvalds } 38331da177e4SLinus Torvalds if (test_clear_buffer_journal_restore_dirty(bh) && 38341da177e4SLinus Torvalds buffer_journal_dirty(bh)) { 38351da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 3836a9dd3643SJeff Mahoney cn = get_journal_hash_dev(sb, 38371da177e4SLinus Torvalds journal->j_list_hash_table, 38381da177e4SLinus Torvalds bh->b_blocknr); 38391da177e4SLinus Torvalds if (cn && can_dirty(cn)) { 38401da177e4SLinus Torvalds set_buffer_journal_test(bh); 38411da177e4SLinus Torvalds mark_buffer_dirty(bh); 38421da177e4SLinus Torvalds } 38431da177e4SLinus Torvalds } 38441da177e4SLinus Torvalds clear_buffer_journal_prepared(bh); 38451da177e4SLinus Torvalds } 38461da177e4SLinus Torvalds 38471da177e4SLinus Torvalds extern struct tree_balance *cur_tb; 38481da177e4SLinus Torvalds /* 38491da177e4SLinus Torvalds ** before we can change a metadata block, we have to make sure it won't 38501da177e4SLinus Torvalds ** be written to disk while we are altering it. So, we must: 38511da177e4SLinus Torvalds ** clean it 38521da177e4SLinus Torvalds ** wait on it. 38531da177e4SLinus Torvalds ** 38541da177e4SLinus Torvalds */ 3855a9dd3643SJeff Mahoney int reiserfs_prepare_for_journal(struct super_block *sb, 3856bd4c625cSLinus Torvalds struct buffer_head *bh, int wait) 3857bd4c625cSLinus Torvalds { 3858a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.prepare); 38591da177e4SLinus Torvalds 3860ca5de404SNick Piggin if (!trylock_buffer(bh)) { 38611da177e4SLinus Torvalds if (!wait) 38621da177e4SLinus Torvalds return 0; 38631da177e4SLinus Torvalds lock_buffer(bh); 38641da177e4SLinus Torvalds } 38651da177e4SLinus Torvalds set_buffer_journal_prepared(bh); 38661da177e4SLinus Torvalds if (test_clear_buffer_dirty(bh) && buffer_journal_dirty(bh)) { 38671da177e4SLinus Torvalds clear_buffer_journal_test(bh); 38681da177e4SLinus Torvalds set_buffer_journal_restore_dirty(bh); 38691da177e4SLinus Torvalds } 38701da177e4SLinus Torvalds unlock_buffer(bh); 38711da177e4SLinus Torvalds return 1; 38721da177e4SLinus Torvalds } 38731da177e4SLinus Torvalds 3874bd4c625cSLinus Torvalds static void flush_old_journal_lists(struct super_block *s) 3875bd4c625cSLinus Torvalds { 38761da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 38771da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 38781da177e4SLinus Torvalds struct list_head *entry; 38791da177e4SLinus Torvalds time_t now = get_seconds(); 38801da177e4SLinus Torvalds 38811da177e4SLinus Torvalds while (!list_empty(&journal->j_journal_list)) { 38821da177e4SLinus Torvalds entry = journal->j_journal_list.next; 38831da177e4SLinus Torvalds jl = JOURNAL_LIST_ENTRY(entry); 38841da177e4SLinus Torvalds /* this check should always be run, to send old lists to disk */ 3885a3172027SChris Mason if (jl->j_timestamp < (now - (JOURNAL_MAX_TRANS_AGE * 4)) && 3886a3172027SChris Mason atomic_read(&jl->j_commit_left) == 0 && 3887a3172027SChris Mason test_transaction(s, jl)) { 38881da177e4SLinus Torvalds flush_used_journal_lists(s, jl); 38891da177e4SLinus Torvalds } else { 38901da177e4SLinus Torvalds break; 38911da177e4SLinus Torvalds } 38921da177e4SLinus Torvalds } 38931da177e4SLinus Torvalds } 38941da177e4SLinus Torvalds 38951da177e4SLinus Torvalds /* 38961da177e4SLinus Torvalds ** long and ugly. If flush, will not return until all commit 38971da177e4SLinus Torvalds ** blocks and all real buffers in the trans are on disk. 38981da177e4SLinus Torvalds ** If no_async, won't return until all commit blocks are on disk. 38991da177e4SLinus Torvalds ** 39001da177e4SLinus Torvalds ** keep reading, there are comments as you go along 39011da177e4SLinus Torvalds ** 39021da177e4SLinus Torvalds ** If the journal is aborted, we just clean up. Things like flushing 39031da177e4SLinus Torvalds ** journal lists, etc just won't happen. 39041da177e4SLinus Torvalds */ 3905bd4c625cSLinus Torvalds static int do_journal_end(struct reiserfs_transaction_handle *th, 3906a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks, 3907bd4c625cSLinus Torvalds int flags) 3908bd4c625cSLinus Torvalds { 3909a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 39101da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn, *next, *jl_cn; 39111da177e4SLinus Torvalds struct reiserfs_journal_cnode *last_cn = NULL; 39121da177e4SLinus Torvalds struct reiserfs_journal_desc *desc; 39131da177e4SLinus Torvalds struct reiserfs_journal_commit *commit; 39141da177e4SLinus Torvalds struct buffer_head *c_bh; /* commit bh */ 39151da177e4SLinus Torvalds struct buffer_head *d_bh; /* desc bh */ 39161da177e4SLinus Torvalds int cur_write_start = 0; /* start index of current log write */ 39171da177e4SLinus Torvalds int old_start; 39181da177e4SLinus Torvalds int i; 3919a44c94a7SAlexander Zarochentsev int flush; 3920a44c94a7SAlexander Zarochentsev int wait_on_commit; 39211da177e4SLinus Torvalds struct reiserfs_journal_list *jl, *temp_jl; 39221da177e4SLinus Torvalds struct list_head *entry, *safe; 39231da177e4SLinus Torvalds unsigned long jindex; 3924600ed416SJeff Mahoney unsigned int commit_trans_id; 39251da177e4SLinus Torvalds int trans_half; 39261da177e4SLinus Torvalds 39271da177e4SLinus Torvalds BUG_ON(th->t_refcount > 1); 39281da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 39291da177e4SLinus Torvalds 3930a44c94a7SAlexander Zarochentsev /* protect flush_older_commits from doing mistakes if the 3931a44c94a7SAlexander Zarochentsev transaction ID counter gets overflowed. */ 3932600ed416SJeff Mahoney if (th->t_trans_id == ~0U) 3933a44c94a7SAlexander Zarochentsev flags |= FLUSH_ALL | COMMIT_NOW | WAIT; 3934a44c94a7SAlexander Zarochentsev flush = flags & FLUSH_ALL; 3935a44c94a7SAlexander Zarochentsev wait_on_commit = flags & WAIT; 3936a44c94a7SAlexander Zarochentsev 39371da177e4SLinus Torvalds current->journal_info = th->t_handle_save; 3938a9dd3643SJeff Mahoney reiserfs_check_lock_depth(sb, "journal end"); 39391da177e4SLinus Torvalds if (journal->j_len == 0) { 3940a9dd3643SJeff Mahoney reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), 3941bd4c625cSLinus Torvalds 1); 3942a9dd3643SJeff Mahoney journal_mark_dirty(th, sb, SB_BUFFER_WITH_SB(sb)); 39431da177e4SLinus Torvalds } 39441da177e4SLinus Torvalds 3945a9dd3643SJeff Mahoney lock_journal(sb); 39461da177e4SLinus Torvalds if (journal->j_next_full_flush) { 39471da177e4SLinus Torvalds flags |= FLUSH_ALL; 39481da177e4SLinus Torvalds flush = 1; 39491da177e4SLinus Torvalds } 39501da177e4SLinus Torvalds if (journal->j_next_async_flush) { 39511da177e4SLinus Torvalds flags |= COMMIT_NOW | WAIT; 39521da177e4SLinus Torvalds wait_on_commit = 1; 39531da177e4SLinus Torvalds } 39541da177e4SLinus Torvalds 39551da177e4SLinus Torvalds /* check_journal_end locks the journal, and unlocks if it does not return 1 39561da177e4SLinus Torvalds ** it tells us if we should continue with the journal_end, or just return 39571da177e4SLinus Torvalds */ 3958a9dd3643SJeff Mahoney if (!check_journal_end(th, sb, nblocks, flags)) { 3959a9dd3643SJeff Mahoney sb->s_dirt = 1; 3960a9dd3643SJeff Mahoney wake_queued_writers(sb); 3961a9dd3643SJeff Mahoney reiserfs_async_progress_wait(sb); 39621da177e4SLinus Torvalds goto out; 39631da177e4SLinus Torvalds } 39641da177e4SLinus Torvalds 39651da177e4SLinus Torvalds /* check_journal_end might set these, check again */ 39661da177e4SLinus Torvalds if (journal->j_next_full_flush) { 39671da177e4SLinus Torvalds flush = 1; 39681da177e4SLinus Torvalds } 39691da177e4SLinus Torvalds 39701da177e4SLinus Torvalds /* 39711da177e4SLinus Torvalds ** j must wait means we have to flush the log blocks, and the real blocks for 39721da177e4SLinus Torvalds ** this transaction 39731da177e4SLinus Torvalds */ 39741da177e4SLinus Torvalds if (journal->j_must_wait > 0) { 39751da177e4SLinus Torvalds flush = 1; 39761da177e4SLinus Torvalds } 39771da177e4SLinus Torvalds #ifdef REISERFS_PREALLOCATE 3978ef43bc4fSJan Kara /* quota ops might need to nest, setup the journal_info pointer for them 3979ef43bc4fSJan Kara * and raise the refcount so that it is > 0. */ 39801da177e4SLinus Torvalds current->journal_info = th; 3981ef43bc4fSJan Kara th->t_refcount++; 39821da177e4SLinus Torvalds reiserfs_discard_all_prealloc(th); /* it should not involve new blocks into 39831da177e4SLinus Torvalds * the transaction */ 3984ef43bc4fSJan Kara th->t_refcount--; 39851da177e4SLinus Torvalds current->journal_info = th->t_handle_save; 39861da177e4SLinus Torvalds #endif 39871da177e4SLinus Torvalds 39881da177e4SLinus Torvalds /* setup description block */ 3989bd4c625cSLinus Torvalds d_bh = 3990a9dd3643SJeff Mahoney journal_getblk(sb, 3991a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 3992bd4c625cSLinus Torvalds journal->j_start); 39931da177e4SLinus Torvalds set_buffer_uptodate(d_bh); 39941da177e4SLinus Torvalds desc = (struct reiserfs_journal_desc *)(d_bh)->b_data; 39951da177e4SLinus Torvalds memset(d_bh->b_data, 0, d_bh->b_size); 39961da177e4SLinus Torvalds memcpy(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8); 39971da177e4SLinus Torvalds set_desc_trans_id(desc, journal->j_trans_id); 39981da177e4SLinus Torvalds 39991da177e4SLinus Torvalds /* setup commit block. Don't write (keep it clean too) this one until after everyone else is written */ 4000a9dd3643SJeff Mahoney c_bh = journal_getblk(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 4001bd4c625cSLinus Torvalds ((journal->j_start + journal->j_len + 4002a9dd3643SJeff Mahoney 1) % SB_ONDISK_JOURNAL_SIZE(sb))); 40031da177e4SLinus Torvalds commit = (struct reiserfs_journal_commit *)c_bh->b_data; 40041da177e4SLinus Torvalds memset(c_bh->b_data, 0, c_bh->b_size); 40051da177e4SLinus Torvalds set_commit_trans_id(commit, journal->j_trans_id); 40061da177e4SLinus Torvalds set_buffer_uptodate(c_bh); 40071da177e4SLinus Torvalds 40081da177e4SLinus Torvalds /* init this journal list */ 40091da177e4SLinus Torvalds jl = journal->j_current_jl; 40101da177e4SLinus Torvalds 40111da177e4SLinus Torvalds /* we lock the commit before doing anything because 40121da177e4SLinus Torvalds * we want to make sure nobody tries to run flush_commit_list until 40131da177e4SLinus Torvalds * the new transaction is fully setup, and we've already flushed the 40141da177e4SLinus Torvalds * ordered bh list 40151da177e4SLinus Torvalds */ 40168ebc4232SFrederic Weisbecker reiserfs_mutex_lock_safe(&jl->j_commit_mutex, sb); 40171da177e4SLinus Torvalds 40181da177e4SLinus Torvalds /* save the transaction id in case we need to commit it later */ 40191da177e4SLinus Torvalds commit_trans_id = jl->j_trans_id; 40201da177e4SLinus Torvalds 40211da177e4SLinus Torvalds atomic_set(&jl->j_older_commits_done, 0); 40221da177e4SLinus Torvalds jl->j_trans_id = journal->j_trans_id; 40231da177e4SLinus Torvalds jl->j_timestamp = journal->j_trans_start_time; 40241da177e4SLinus Torvalds jl->j_commit_bh = c_bh; 40251da177e4SLinus Torvalds jl->j_start = journal->j_start; 40261da177e4SLinus Torvalds jl->j_len = journal->j_len; 40271da177e4SLinus Torvalds atomic_set(&jl->j_nonzerolen, journal->j_len); 40281da177e4SLinus Torvalds atomic_set(&jl->j_commit_left, journal->j_len + 2); 40291da177e4SLinus Torvalds jl->j_realblock = NULL; 40301da177e4SLinus Torvalds 40311da177e4SLinus Torvalds /* The ENTIRE FOR LOOP MUST not cause schedule to occur. 40321da177e4SLinus Torvalds ** for each real block, add it to the journal list hash, 40331da177e4SLinus Torvalds ** copy into real block index array in the commit or desc block 40341da177e4SLinus Torvalds */ 4035a9dd3643SJeff Mahoney trans_half = journal_trans_half(sb->s_blocksize); 40361da177e4SLinus Torvalds for (i = 0, cn = journal->j_first; cn; cn = cn->next, i++) { 40371da177e4SLinus Torvalds if (buffer_journaled(cn->bh)) { 4038a9dd3643SJeff Mahoney jl_cn = get_cnode(sb); 40391da177e4SLinus Torvalds if (!jl_cn) { 4040a9dd3643SJeff Mahoney reiserfs_panic(sb, "journal-1676", 4041c3a9c210SJeff Mahoney "get_cnode returned NULL"); 40421da177e4SLinus Torvalds } 40431da177e4SLinus Torvalds if (i == 0) { 40441da177e4SLinus Torvalds jl->j_realblock = jl_cn; 40451da177e4SLinus Torvalds } 40461da177e4SLinus Torvalds jl_cn->prev = last_cn; 40471da177e4SLinus Torvalds jl_cn->next = NULL; 40481da177e4SLinus Torvalds if (last_cn) { 40491da177e4SLinus Torvalds last_cn->next = jl_cn; 40501da177e4SLinus Torvalds } 40511da177e4SLinus Torvalds last_cn = jl_cn; 40521da177e4SLinus Torvalds /* make sure the block we are trying to log is not a block 40531da177e4SLinus Torvalds of journal or reserved area */ 40541da177e4SLinus Torvalds 4055bd4c625cSLinus Torvalds if (is_block_in_log_or_reserved_area 4056a9dd3643SJeff Mahoney (sb, cn->bh->b_blocknr)) { 4057a9dd3643SJeff Mahoney reiserfs_panic(sb, "journal-2332", 4058c3a9c210SJeff Mahoney "Trying to log block %lu, " 4059c3a9c210SJeff Mahoney "which is a log block", 4060bd4c625cSLinus Torvalds cn->bh->b_blocknr); 40611da177e4SLinus Torvalds } 40621da177e4SLinus Torvalds jl_cn->blocknr = cn->bh->b_blocknr; 40631da177e4SLinus Torvalds jl_cn->state = 0; 4064a9dd3643SJeff Mahoney jl_cn->sb = sb; 40651da177e4SLinus Torvalds jl_cn->bh = cn->bh; 40661da177e4SLinus Torvalds jl_cn->jlist = jl; 40671da177e4SLinus Torvalds insert_journal_hash(journal->j_list_hash_table, jl_cn); 40681da177e4SLinus Torvalds if (i < trans_half) { 4069bd4c625cSLinus Torvalds desc->j_realblock[i] = 4070bd4c625cSLinus Torvalds cpu_to_le32(cn->bh->b_blocknr); 40711da177e4SLinus Torvalds } else { 4072bd4c625cSLinus Torvalds commit->j_realblock[i - trans_half] = 4073bd4c625cSLinus Torvalds cpu_to_le32(cn->bh->b_blocknr); 40741da177e4SLinus Torvalds } 40751da177e4SLinus Torvalds } else { 40761da177e4SLinus Torvalds i--; 40771da177e4SLinus Torvalds } 40781da177e4SLinus Torvalds } 40791da177e4SLinus Torvalds set_desc_trans_len(desc, journal->j_len); 40801da177e4SLinus Torvalds set_desc_mount_id(desc, journal->j_mount_id); 40811da177e4SLinus Torvalds set_desc_trans_id(desc, journal->j_trans_id); 40821da177e4SLinus Torvalds set_commit_trans_len(commit, journal->j_len); 40831da177e4SLinus Torvalds 40841da177e4SLinus Torvalds /* special check in case all buffers in the journal were marked for not logging */ 408514a61442SEric Sesterhenn BUG_ON(journal->j_len == 0); 40861da177e4SLinus Torvalds 40871da177e4SLinus Torvalds /* we're about to dirty all the log blocks, mark the description block 40881da177e4SLinus Torvalds * dirty now too. Don't mark the commit block dirty until all the 40891da177e4SLinus Torvalds * others are on disk 40901da177e4SLinus Torvalds */ 40911da177e4SLinus Torvalds mark_buffer_dirty(d_bh); 40921da177e4SLinus Torvalds 40931da177e4SLinus Torvalds /* first data block is j_start + 1, so add one to cur_write_start wherever you use it */ 40941da177e4SLinus Torvalds cur_write_start = journal->j_start; 40951da177e4SLinus Torvalds cn = journal->j_first; 40961da177e4SLinus Torvalds jindex = 1; /* start at one so we don't get the desc again */ 40971da177e4SLinus Torvalds while (cn) { 40981da177e4SLinus Torvalds clear_buffer_journal_new(cn->bh); 40991da177e4SLinus Torvalds /* copy all the real blocks into log area. dirty log blocks */ 41001da177e4SLinus Torvalds if (buffer_journaled(cn->bh)) { 41011da177e4SLinus Torvalds struct buffer_head *tmp_bh; 41021da177e4SLinus Torvalds char *addr; 41031da177e4SLinus Torvalds struct page *page; 4104bd4c625cSLinus Torvalds tmp_bh = 4105a9dd3643SJeff Mahoney journal_getblk(sb, 4106a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 4107bd4c625cSLinus Torvalds ((cur_write_start + 4108bd4c625cSLinus Torvalds jindex) % 4109a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb))); 41101da177e4SLinus Torvalds set_buffer_uptodate(tmp_bh); 41111da177e4SLinus Torvalds page = cn->bh->b_page; 41121da177e4SLinus Torvalds addr = kmap(page); 4113bd4c625cSLinus Torvalds memcpy(tmp_bh->b_data, 4114bd4c625cSLinus Torvalds addr + offset_in_page(cn->bh->b_data), 41151da177e4SLinus Torvalds cn->bh->b_size); 41161da177e4SLinus Torvalds kunmap(page); 41171da177e4SLinus Torvalds mark_buffer_dirty(tmp_bh); 41181da177e4SLinus Torvalds jindex++; 41191da177e4SLinus Torvalds set_buffer_journal_dirty(cn->bh); 41201da177e4SLinus Torvalds clear_buffer_journaled(cn->bh); 41211da177e4SLinus Torvalds } else { 41221da177e4SLinus Torvalds /* JDirty cleared sometime during transaction. don't log this one */ 4123a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-2048", 412445b03d5eSJeff Mahoney "BAD, buffer in journal hash, " 412545b03d5eSJeff Mahoney "but not JDirty!"); 41261da177e4SLinus Torvalds brelse(cn->bh); 41271da177e4SLinus Torvalds } 41281da177e4SLinus Torvalds next = cn->next; 4129a9dd3643SJeff Mahoney free_cnode(sb, cn); 41301da177e4SLinus Torvalds cn = next; 4131e6950a4dSFrederic Weisbecker reiserfs_write_unlock(sb); 41321da177e4SLinus Torvalds cond_resched(); 4133e6950a4dSFrederic Weisbecker reiserfs_write_lock(sb); 41341da177e4SLinus Torvalds } 41351da177e4SLinus Torvalds 41361da177e4SLinus Torvalds /* we are done with both the c_bh and d_bh, but 41371da177e4SLinus Torvalds ** c_bh must be written after all other commit blocks, 41381da177e4SLinus Torvalds ** so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1. 41391da177e4SLinus Torvalds */ 41401da177e4SLinus Torvalds 4141a9dd3643SJeff Mahoney journal->j_current_jl = alloc_journal_list(sb); 41421da177e4SLinus Torvalds 41431da177e4SLinus Torvalds /* now it is safe to insert this transaction on the main list */ 41441da177e4SLinus Torvalds list_add_tail(&jl->j_list, &journal->j_journal_list); 41451da177e4SLinus Torvalds list_add_tail(&jl->j_working_list, &journal->j_working_list); 41461da177e4SLinus Torvalds journal->j_num_work_lists++; 41471da177e4SLinus Torvalds 41481da177e4SLinus Torvalds /* reset journal values for the next transaction */ 41491da177e4SLinus Torvalds old_start = journal->j_start; 4150bd4c625cSLinus Torvalds journal->j_start = 4151bd4c625cSLinus Torvalds (journal->j_start + journal->j_len + 4152a9dd3643SJeff Mahoney 2) % SB_ONDISK_JOURNAL_SIZE(sb); 41531da177e4SLinus Torvalds atomic_set(&(journal->j_wcount), 0); 41541da177e4SLinus Torvalds journal->j_bcount = 0; 41551da177e4SLinus Torvalds journal->j_last = NULL; 41561da177e4SLinus Torvalds journal->j_first = NULL; 41571da177e4SLinus Torvalds journal->j_len = 0; 41581da177e4SLinus Torvalds journal->j_trans_start_time = 0; 4159a44c94a7SAlexander Zarochentsev /* check for trans_id overflow */ 4160a44c94a7SAlexander Zarochentsev if (++journal->j_trans_id == 0) 4161a44c94a7SAlexander Zarochentsev journal->j_trans_id = 10; 41621da177e4SLinus Torvalds journal->j_current_jl->j_trans_id = journal->j_trans_id; 41631da177e4SLinus Torvalds journal->j_must_wait = 0; 41641da177e4SLinus Torvalds journal->j_len_alloc = 0; 41651da177e4SLinus Torvalds journal->j_next_full_flush = 0; 41661da177e4SLinus Torvalds journal->j_next_async_flush = 0; 4167a9dd3643SJeff Mahoney init_journal_hash(sb); 41681da177e4SLinus Torvalds 41691da177e4SLinus Torvalds // make sure reiserfs_add_jh sees the new current_jl before we 41701da177e4SLinus Torvalds // write out the tails 41711da177e4SLinus Torvalds smp_mb(); 41721da177e4SLinus Torvalds 41731da177e4SLinus Torvalds /* tail conversion targets have to hit the disk before we end the 41741da177e4SLinus Torvalds * transaction. Otherwise a later transaction might repack the tail 41751da177e4SLinus Torvalds * before this transaction commits, leaving the data block unflushed and 41761da177e4SLinus Torvalds * clean, if we crash before the later transaction commits, the data block 41771da177e4SLinus Torvalds * is lost. 41781da177e4SLinus Torvalds */ 41791da177e4SLinus Torvalds if (!list_empty(&jl->j_tail_bh_list)) { 41808ebc4232SFrederic Weisbecker reiserfs_write_unlock(sb); 41811da177e4SLinus Torvalds write_ordered_buffers(&journal->j_dirty_buffers_lock, 41821da177e4SLinus Torvalds journal, jl, &jl->j_tail_bh_list); 41838ebc4232SFrederic Weisbecker reiserfs_write_lock(sb); 41841da177e4SLinus Torvalds } 418514a61442SEric Sesterhenn BUG_ON(!list_empty(&jl->j_tail_bh_list)); 418690415deaSJeff Mahoney mutex_unlock(&jl->j_commit_mutex); 41871da177e4SLinus Torvalds 41881da177e4SLinus Torvalds /* honor the flush wishes from the caller, simple commits can 41891da177e4SLinus Torvalds ** be done outside the journal lock, they are done below 41901da177e4SLinus Torvalds ** 41911da177e4SLinus Torvalds ** if we don't flush the commit list right now, we put it into 41921da177e4SLinus Torvalds ** the work queue so the people waiting on the async progress work 41931da177e4SLinus Torvalds ** queue don't wait for this proc to flush journal lists and such. 41941da177e4SLinus Torvalds */ 41951da177e4SLinus Torvalds if (flush) { 4196a9dd3643SJeff Mahoney flush_commit_list(sb, jl, 1); 4197a9dd3643SJeff Mahoney flush_journal_list(sb, jl, 1); 41981da177e4SLinus Torvalds } else if (!(jl->j_state & LIST_COMMIT_PENDING)) 41991da177e4SLinus Torvalds queue_delayed_work(commit_wq, &journal->j_work, HZ / 10); 42001da177e4SLinus Torvalds 42011da177e4SLinus Torvalds /* if the next transaction has any chance of wrapping, flush 42021da177e4SLinus Torvalds ** transactions that might get overwritten. If any journal lists are very 42031da177e4SLinus Torvalds ** old flush them as well. 42041da177e4SLinus Torvalds */ 42051da177e4SLinus Torvalds first_jl: 42061da177e4SLinus Torvalds list_for_each_safe(entry, safe, &journal->j_journal_list) { 42071da177e4SLinus Torvalds temp_jl = JOURNAL_LIST_ENTRY(entry); 42081da177e4SLinus Torvalds if (journal->j_start <= temp_jl->j_start) { 42091da177e4SLinus Torvalds if ((journal->j_start + journal->j_trans_max + 1) >= 4210bd4c625cSLinus Torvalds temp_jl->j_start) { 4211a9dd3643SJeff Mahoney flush_used_journal_lists(sb, temp_jl); 42121da177e4SLinus Torvalds goto first_jl; 42131da177e4SLinus Torvalds } else if ((journal->j_start + 42141da177e4SLinus Torvalds journal->j_trans_max + 1) < 4215a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb)) { 42161da177e4SLinus Torvalds /* if we don't cross into the next transaction and we don't 42171da177e4SLinus Torvalds * wrap, there is no way we can overlap any later transactions 42181da177e4SLinus Torvalds * break now 42191da177e4SLinus Torvalds */ 42201da177e4SLinus Torvalds break; 42211da177e4SLinus Torvalds } 42221da177e4SLinus Torvalds } else if ((journal->j_start + 42231da177e4SLinus Torvalds journal->j_trans_max + 1) > 4224a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb)) { 42251da177e4SLinus Torvalds if (((journal->j_start + journal->j_trans_max + 1) % 4226a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb)) >= 4227bd4c625cSLinus Torvalds temp_jl->j_start) { 4228a9dd3643SJeff Mahoney flush_used_journal_lists(sb, temp_jl); 42291da177e4SLinus Torvalds goto first_jl; 42301da177e4SLinus Torvalds } else { 42311da177e4SLinus Torvalds /* we don't overlap anything from out start to the end of the 42321da177e4SLinus Torvalds * log, and our wrapped portion doesn't overlap anything at 42331da177e4SLinus Torvalds * the start of the log. We can break 42341da177e4SLinus Torvalds */ 42351da177e4SLinus Torvalds break; 42361da177e4SLinus Torvalds } 42371da177e4SLinus Torvalds } 42381da177e4SLinus Torvalds } 4239a9dd3643SJeff Mahoney flush_old_journal_lists(sb); 42401da177e4SLinus Torvalds 4241bd4c625cSLinus Torvalds journal->j_current_jl->j_list_bitmap = 4242a9dd3643SJeff Mahoney get_list_bitmap(sb, journal->j_current_jl); 42431da177e4SLinus Torvalds 42441da177e4SLinus Torvalds if (!(journal->j_current_jl->j_list_bitmap)) { 4245a9dd3643SJeff Mahoney reiserfs_panic(sb, "journal-1996", 4246c3a9c210SJeff Mahoney "could not get a list bitmap"); 42471da177e4SLinus Torvalds } 42481da177e4SLinus Torvalds 42491da177e4SLinus Torvalds atomic_set(&(journal->j_jlock), 0); 4250a9dd3643SJeff Mahoney unlock_journal(sb); 42511da177e4SLinus Torvalds /* wake up any body waiting to join. */ 42521da177e4SLinus Torvalds clear_bit(J_WRITERS_QUEUED, &journal->j_state); 42531da177e4SLinus Torvalds wake_up(&(journal->j_join_wait)); 42541da177e4SLinus Torvalds 42551da177e4SLinus Torvalds if (!flush && wait_on_commit && 4256a9dd3643SJeff Mahoney journal_list_still_alive(sb, commit_trans_id)) { 4257a9dd3643SJeff Mahoney flush_commit_list(sb, jl, 1); 42581da177e4SLinus Torvalds } 42591da177e4SLinus Torvalds out: 4260a9dd3643SJeff Mahoney reiserfs_check_lock_depth(sb, "journal end2"); 42611da177e4SLinus Torvalds 42621da177e4SLinus Torvalds memset(th, 0, sizeof(*th)); 42631da177e4SLinus Torvalds /* Re-set th->t_super, so we can properly keep track of how many 42641da177e4SLinus Torvalds * persistent transactions there are. We need to do this so if this 42651da177e4SLinus Torvalds * call is part of a failed restart_transaction, we can free it later */ 4266a9dd3643SJeff Mahoney th->t_super = sb; 42671da177e4SLinus Torvalds 42681da177e4SLinus Torvalds return journal->j_errno; 42691da177e4SLinus Torvalds } 42701da177e4SLinus Torvalds 427132e8b106SJeff Mahoney /* Send the file system read only and refuse new transactions */ 427232e8b106SJeff Mahoney void reiserfs_abort_journal(struct super_block *sb, int errno) 42731da177e4SLinus Torvalds { 42741da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(sb); 42751da177e4SLinus Torvalds if (test_bit(J_ABORTED, &journal->j_state)) 42761da177e4SLinus Torvalds return; 42771da177e4SLinus Torvalds 427832e8b106SJeff Mahoney if (!journal->j_errno) 427932e8b106SJeff Mahoney journal->j_errno = errno; 42801da177e4SLinus Torvalds 42811da177e4SLinus Torvalds sb->s_flags |= MS_RDONLY; 42821da177e4SLinus Torvalds set_bit(J_ABORTED, &journal->j_state); 42831da177e4SLinus Torvalds 42841da177e4SLinus Torvalds #ifdef CONFIG_REISERFS_CHECK 42851da177e4SLinus Torvalds dump_stack(); 42861da177e4SLinus Torvalds #endif 42871da177e4SLinus Torvalds } 4288