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> 40f466c6fdSAl Viro #include "reiserfs.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 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds /* gets a struct reiserfs_journal_list * from a list head */ 561da177e4SLinus Torvalds #define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \ 571da177e4SLinus Torvalds j_list)) 581da177e4SLinus Torvalds #define JOURNAL_WORK_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \ 591da177e4SLinus Torvalds j_working_list)) 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds /* the number of mounted filesystems. This is used to decide when to 621da177e4SLinus Torvalds ** start and kill the commit workqueue 631da177e4SLinus Torvalds */ 641da177e4SLinus Torvalds static int reiserfs_mounted_fs_count; 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds static struct workqueue_struct *commit_wq; 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds #define JOURNAL_TRANS_HALF 1018 /* must be correct to keep the desc and commit 691da177e4SLinus Torvalds structs at 4k */ 701da177e4SLinus Torvalds #define BUFNR 64 /*read ahead */ 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds /* cnode stat bits. Move these into reiserfs_fs.h */ 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds #define BLOCK_FREED 2 /* this block was freed, and can't be written. */ 751da177e4SLinus Torvalds #define BLOCK_FREED_HOLDER 3 /* this block was freed during this transaction, and can't be written */ 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds #define BLOCK_NEEDS_FLUSH 4 /* used in flush_journal_list */ 781da177e4SLinus Torvalds #define BLOCK_DIRTIED 5 791da177e4SLinus Torvalds 801da177e4SLinus Torvalds /* journal list state bits */ 811da177e4SLinus Torvalds #define LIST_TOUCHED 1 821da177e4SLinus Torvalds #define LIST_DIRTY 2 831da177e4SLinus Torvalds #define LIST_COMMIT_PENDING 4 /* someone will commit this list */ 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds /* flags for do_journal_end */ 861da177e4SLinus Torvalds #define FLUSH_ALL 1 /* flush commit and real blocks */ 871da177e4SLinus Torvalds #define COMMIT_NOW 2 /* end and commit this transaction */ 881da177e4SLinus Torvalds #define WAIT 4 /* wait for the log blocks to hit the disk */ 891da177e4SLinus Torvalds 90bd4c625cSLinus Torvalds static int do_journal_end(struct reiserfs_transaction_handle *, 91bd4c625cSLinus Torvalds struct super_block *, unsigned long nblocks, 92bd4c625cSLinus Torvalds int flags); 93bd4c625cSLinus Torvalds static int flush_journal_list(struct super_block *s, 94bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl, int flushall); 95bd4c625cSLinus Torvalds static int flush_commit_list(struct super_block *s, 96bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl, int flushall); 971da177e4SLinus Torvalds static int can_dirty(struct reiserfs_journal_cnode *cn); 98bd4c625cSLinus Torvalds static int journal_join(struct reiserfs_transaction_handle *th, 99a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks); 1001da177e4SLinus Torvalds static int release_journal_dev(struct super_block *super, 1011da177e4SLinus Torvalds struct reiserfs_journal *journal); 1021da177e4SLinus Torvalds static int dirty_one_transaction(struct super_block *s, 1031da177e4SLinus Torvalds struct reiserfs_journal_list *jl); 104c4028958SDavid Howells static void flush_async_commits(struct work_struct *work); 1051da177e4SLinus Torvalds static void queue_log_writer(struct super_block *s); 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds /* values for join in do_journal_begin_r */ 1081da177e4SLinus Torvalds enum { 1091da177e4SLinus Torvalds JBEGIN_REG = 0, /* regular journal begin */ 1101da177e4SLinus Torvalds JBEGIN_JOIN = 1, /* join the running transaction if at all possible */ 1111da177e4SLinus Torvalds JBEGIN_ABORT = 2, /* called from cleanup code, ignores aborted flag */ 1121da177e4SLinus Torvalds }; 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds static int do_journal_begin_r(struct reiserfs_transaction_handle *th, 115a9dd3643SJeff Mahoney struct super_block *sb, 1161da177e4SLinus Torvalds unsigned long nblocks, int join); 1171da177e4SLinus Torvalds 118a9dd3643SJeff Mahoney static void init_journal_hash(struct super_block *sb) 119bd4c625cSLinus Torvalds { 120a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 121bd4c625cSLinus Torvalds memset(journal->j_hash_table, 0, 122bd4c625cSLinus Torvalds JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)); 1231da177e4SLinus Torvalds } 1241da177e4SLinus Torvalds 1251da177e4SLinus Torvalds /* 1261da177e4SLinus Torvalds ** clears BH_Dirty and sticks the buffer on the clean list. Called because I can't allow refile_buffer to 1271da177e4SLinus Torvalds ** make schedule happen after I've freed a block. Look at remove_from_transaction and journal_mark_freed for 1281da177e4SLinus Torvalds ** more details. 1291da177e4SLinus Torvalds */ 130bd4c625cSLinus Torvalds static int reiserfs_clean_and_file_buffer(struct buffer_head *bh) 131bd4c625cSLinus Torvalds { 1321da177e4SLinus Torvalds if (bh) { 1331da177e4SLinus Torvalds clear_buffer_dirty(bh); 1341da177e4SLinus Torvalds clear_buffer_journal_test(bh); 1351da177e4SLinus Torvalds } 1361da177e4SLinus Torvalds return 0; 1371da177e4SLinus Torvalds } 1381da177e4SLinus Torvalds 139bd4c625cSLinus Torvalds static struct reiserfs_bitmap_node *allocate_bitmap_node(struct super_block 140a9dd3643SJeff Mahoney *sb) 141bd4c625cSLinus Torvalds { 1421da177e4SLinus Torvalds struct reiserfs_bitmap_node *bn; 1431da177e4SLinus Torvalds static int id; 1441da177e4SLinus Torvalds 145d739b42bSPekka Enberg bn = kmalloc(sizeof(struct reiserfs_bitmap_node), GFP_NOFS); 1461da177e4SLinus Torvalds if (!bn) { 1471da177e4SLinus Torvalds return NULL; 1481da177e4SLinus Torvalds } 149a9dd3643SJeff Mahoney bn->data = kzalloc(sb->s_blocksize, GFP_NOFS); 1501da177e4SLinus Torvalds if (!bn->data) { 151d739b42bSPekka Enberg kfree(bn); 1521da177e4SLinus Torvalds return NULL; 1531da177e4SLinus Torvalds } 1541da177e4SLinus Torvalds bn->id = id++; 1551da177e4SLinus Torvalds INIT_LIST_HEAD(&bn->list); 1561da177e4SLinus Torvalds return bn; 1571da177e4SLinus Torvalds } 1581da177e4SLinus Torvalds 159a9dd3643SJeff Mahoney static struct reiserfs_bitmap_node *get_bitmap_node(struct super_block *sb) 160bd4c625cSLinus Torvalds { 161a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 1621da177e4SLinus Torvalds struct reiserfs_bitmap_node *bn = NULL; 1631da177e4SLinus Torvalds struct list_head *entry = journal->j_bitmap_nodes.next; 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds journal->j_used_bitmap_nodes++; 1661da177e4SLinus Torvalds repeat: 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds if (entry != &journal->j_bitmap_nodes) { 1691da177e4SLinus Torvalds bn = list_entry(entry, struct reiserfs_bitmap_node, list); 1701da177e4SLinus Torvalds list_del(entry); 171a9dd3643SJeff Mahoney memset(bn->data, 0, sb->s_blocksize); 1721da177e4SLinus Torvalds journal->j_free_bitmap_nodes--; 1731da177e4SLinus Torvalds return bn; 1741da177e4SLinus Torvalds } 175a9dd3643SJeff Mahoney bn = allocate_bitmap_node(sb); 1761da177e4SLinus Torvalds if (!bn) { 1771da177e4SLinus Torvalds yield(); 1781da177e4SLinus Torvalds goto repeat; 1791da177e4SLinus Torvalds } 1801da177e4SLinus Torvalds return bn; 1811da177e4SLinus Torvalds } 182a9dd3643SJeff Mahoney static inline void free_bitmap_node(struct super_block *sb, 183bd4c625cSLinus Torvalds struct reiserfs_bitmap_node *bn) 184bd4c625cSLinus Torvalds { 185a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 1861da177e4SLinus Torvalds journal->j_used_bitmap_nodes--; 1871da177e4SLinus Torvalds if (journal->j_free_bitmap_nodes > REISERFS_MAX_BITMAP_NODES) { 188d739b42bSPekka Enberg kfree(bn->data); 189d739b42bSPekka Enberg kfree(bn); 1901da177e4SLinus Torvalds } else { 1911da177e4SLinus Torvalds list_add(&bn->list, &journal->j_bitmap_nodes); 1921da177e4SLinus Torvalds journal->j_free_bitmap_nodes++; 1931da177e4SLinus Torvalds } 1941da177e4SLinus Torvalds } 1951da177e4SLinus Torvalds 196a9dd3643SJeff Mahoney static void allocate_bitmap_nodes(struct super_block *sb) 197bd4c625cSLinus Torvalds { 1981da177e4SLinus Torvalds int i; 199a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 2001da177e4SLinus Torvalds struct reiserfs_bitmap_node *bn = NULL; 2011da177e4SLinus Torvalds for (i = 0; i < REISERFS_MIN_BITMAP_NODES; i++) { 202a9dd3643SJeff Mahoney bn = allocate_bitmap_node(sb); 2031da177e4SLinus Torvalds if (bn) { 2041da177e4SLinus Torvalds list_add(&bn->list, &journal->j_bitmap_nodes); 2051da177e4SLinus Torvalds journal->j_free_bitmap_nodes++; 2061da177e4SLinus Torvalds } else { 2070222e657SJeff Mahoney break; /* this is ok, we'll try again when more are needed */ 2081da177e4SLinus Torvalds } 2091da177e4SLinus Torvalds } 2101da177e4SLinus Torvalds } 2111da177e4SLinus Torvalds 212a9dd3643SJeff Mahoney static int set_bit_in_list_bitmap(struct super_block *sb, 2133ee16670SJeff Mahoney b_blocknr_t block, 214bd4c625cSLinus Torvalds struct reiserfs_list_bitmap *jb) 215bd4c625cSLinus Torvalds { 216a9dd3643SJeff Mahoney unsigned int bmap_nr = block / (sb->s_blocksize << 3); 217a9dd3643SJeff Mahoney unsigned int bit_nr = block % (sb->s_blocksize << 3); 2181da177e4SLinus Torvalds 2191da177e4SLinus Torvalds if (!jb->bitmaps[bmap_nr]) { 220a9dd3643SJeff Mahoney jb->bitmaps[bmap_nr] = get_bitmap_node(sb); 2211da177e4SLinus Torvalds } 2221da177e4SLinus Torvalds set_bit(bit_nr, (unsigned long *)jb->bitmaps[bmap_nr]->data); 2231da177e4SLinus Torvalds return 0; 2241da177e4SLinus Torvalds } 2251da177e4SLinus Torvalds 226a9dd3643SJeff Mahoney static void cleanup_bitmap_list(struct super_block *sb, 227bd4c625cSLinus Torvalds struct reiserfs_list_bitmap *jb) 228bd4c625cSLinus Torvalds { 2291da177e4SLinus Torvalds int i; 2301da177e4SLinus Torvalds if (jb->bitmaps == NULL) 2311da177e4SLinus Torvalds return; 2321da177e4SLinus Torvalds 233a9dd3643SJeff Mahoney for (i = 0; i < reiserfs_bmap_count(sb); i++) { 2341da177e4SLinus Torvalds if (jb->bitmaps[i]) { 235a9dd3643SJeff Mahoney free_bitmap_node(sb, jb->bitmaps[i]); 2361da177e4SLinus Torvalds jb->bitmaps[i] = NULL; 2371da177e4SLinus Torvalds } 2381da177e4SLinus Torvalds } 2391da177e4SLinus Torvalds } 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds /* 2421da177e4SLinus Torvalds ** only call this on FS unmount. 2431da177e4SLinus Torvalds */ 244a9dd3643SJeff Mahoney static int free_list_bitmaps(struct super_block *sb, 245bd4c625cSLinus Torvalds struct reiserfs_list_bitmap *jb_array) 246bd4c625cSLinus Torvalds { 2471da177e4SLinus Torvalds int i; 2481da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb; 2491da177e4SLinus Torvalds for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { 2501da177e4SLinus Torvalds jb = jb_array + i; 2511da177e4SLinus Torvalds jb->journal_list = NULL; 252a9dd3643SJeff Mahoney cleanup_bitmap_list(sb, jb); 2531da177e4SLinus Torvalds vfree(jb->bitmaps); 2541da177e4SLinus Torvalds jb->bitmaps = NULL; 2551da177e4SLinus Torvalds } 2561da177e4SLinus Torvalds return 0; 2571da177e4SLinus Torvalds } 2581da177e4SLinus Torvalds 259a9dd3643SJeff Mahoney static int free_bitmap_nodes(struct super_block *sb) 260bd4c625cSLinus Torvalds { 261a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 2621da177e4SLinus Torvalds struct list_head *next = journal->j_bitmap_nodes.next; 2631da177e4SLinus Torvalds struct reiserfs_bitmap_node *bn; 2641da177e4SLinus Torvalds 2651da177e4SLinus Torvalds while (next != &journal->j_bitmap_nodes) { 2661da177e4SLinus Torvalds bn = list_entry(next, struct reiserfs_bitmap_node, list); 2671da177e4SLinus Torvalds list_del(next); 268d739b42bSPekka Enberg kfree(bn->data); 269d739b42bSPekka Enberg kfree(bn); 2701da177e4SLinus Torvalds next = journal->j_bitmap_nodes.next; 2711da177e4SLinus Torvalds journal->j_free_bitmap_nodes--; 2721da177e4SLinus Torvalds } 2731da177e4SLinus Torvalds 2741da177e4SLinus Torvalds return 0; 2751da177e4SLinus Torvalds } 2761da177e4SLinus Torvalds 2771da177e4SLinus Torvalds /* 2781da177e4SLinus Torvalds ** get memory for JOURNAL_NUM_BITMAPS worth of bitmaps. 2791da177e4SLinus Torvalds ** jb_array is the array to be filled in. 2801da177e4SLinus Torvalds */ 281a9dd3643SJeff Mahoney int reiserfs_allocate_list_bitmaps(struct super_block *sb, 2821da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb_array, 2833ee16670SJeff Mahoney unsigned int bmap_nr) 284bd4c625cSLinus Torvalds { 2851da177e4SLinus Torvalds int i; 2861da177e4SLinus Torvalds int failed = 0; 2871da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb; 2881da177e4SLinus Torvalds int mem = bmap_nr * sizeof(struct reiserfs_bitmap_node *); 2891da177e4SLinus Torvalds 2901da177e4SLinus Torvalds for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { 2911da177e4SLinus Torvalds jb = jb_array + i; 2921da177e4SLinus Torvalds jb->journal_list = NULL; 293558feb08SJoe Perches jb->bitmaps = vzalloc(mem); 2941da177e4SLinus Torvalds if (!jb->bitmaps) { 295a9dd3643SJeff Mahoney reiserfs_warning(sb, "clm-2000", "unable to " 29645b03d5eSJeff Mahoney "allocate bitmaps for journal lists"); 2971da177e4SLinus Torvalds failed = 1; 2981da177e4SLinus Torvalds break; 2991da177e4SLinus Torvalds } 3001da177e4SLinus Torvalds } 3011da177e4SLinus Torvalds if (failed) { 302a9dd3643SJeff Mahoney free_list_bitmaps(sb, jb_array); 3031da177e4SLinus Torvalds return -1; 3041da177e4SLinus Torvalds } 3051da177e4SLinus Torvalds return 0; 3061da177e4SLinus Torvalds } 3071da177e4SLinus Torvalds 3081da177e4SLinus Torvalds /* 3091da177e4SLinus Torvalds ** find an available list bitmap. If you can't find one, flush a commit list 3101da177e4SLinus Torvalds ** and try again 3111da177e4SLinus Torvalds */ 312a9dd3643SJeff Mahoney static struct reiserfs_list_bitmap *get_list_bitmap(struct super_block *sb, 313bd4c625cSLinus Torvalds struct reiserfs_journal_list 314bd4c625cSLinus Torvalds *jl) 315bd4c625cSLinus Torvalds { 3161da177e4SLinus Torvalds int i, j; 317a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 3181da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb = NULL; 3191da177e4SLinus Torvalds 3201da177e4SLinus Torvalds for (j = 0; j < (JOURNAL_NUM_BITMAPS * 3); j++) { 3211da177e4SLinus Torvalds i = journal->j_list_bitmap_index; 3221da177e4SLinus Torvalds journal->j_list_bitmap_index = (i + 1) % JOURNAL_NUM_BITMAPS; 3231da177e4SLinus Torvalds jb = journal->j_list_bitmap + i; 3241da177e4SLinus Torvalds if (journal->j_list_bitmap[i].journal_list) { 325a9dd3643SJeff Mahoney flush_commit_list(sb, 326bd4c625cSLinus Torvalds journal->j_list_bitmap[i]. 327bd4c625cSLinus Torvalds journal_list, 1); 3281da177e4SLinus Torvalds if (!journal->j_list_bitmap[i].journal_list) { 3291da177e4SLinus Torvalds break; 3301da177e4SLinus Torvalds } 3311da177e4SLinus Torvalds } else { 3321da177e4SLinus Torvalds break; 3331da177e4SLinus Torvalds } 3341da177e4SLinus Torvalds } 3351da177e4SLinus Torvalds if (jb->journal_list) { /* double check to make sure if flushed correctly */ 3361da177e4SLinus Torvalds return NULL; 3371da177e4SLinus Torvalds } 3381da177e4SLinus Torvalds jb->journal_list = jl; 3391da177e4SLinus Torvalds return jb; 3401da177e4SLinus Torvalds } 3411da177e4SLinus Torvalds 3421da177e4SLinus Torvalds /* 3431da177e4SLinus Torvalds ** allocates a new chunk of X nodes, and links them all together as a list. 3441da177e4SLinus Torvalds ** Uses the cnode->next and cnode->prev pointers 3451da177e4SLinus Torvalds ** returns NULL on failure 3461da177e4SLinus Torvalds */ 347bd4c625cSLinus Torvalds static struct reiserfs_journal_cnode *allocate_cnodes(int num_cnodes) 348bd4c625cSLinus Torvalds { 3491da177e4SLinus Torvalds struct reiserfs_journal_cnode *head; 3501da177e4SLinus Torvalds int i; 3511da177e4SLinus Torvalds if (num_cnodes <= 0) { 3521da177e4SLinus Torvalds return NULL; 3531da177e4SLinus Torvalds } 354558feb08SJoe Perches head = vzalloc(num_cnodes * sizeof(struct reiserfs_journal_cnode)); 3551da177e4SLinus Torvalds if (!head) { 3561da177e4SLinus Torvalds return NULL; 3571da177e4SLinus Torvalds } 3581da177e4SLinus Torvalds head[0].prev = NULL; 3591da177e4SLinus Torvalds head[0].next = head + 1; 3601da177e4SLinus Torvalds for (i = 1; i < num_cnodes; i++) { 3611da177e4SLinus Torvalds head[i].prev = head + (i - 1); 3621da177e4SLinus Torvalds head[i].next = head + (i + 1); /* if last one, overwrite it after the if */ 3631da177e4SLinus Torvalds } 3641da177e4SLinus Torvalds head[num_cnodes - 1].next = NULL; 3651da177e4SLinus Torvalds return head; 3661da177e4SLinus Torvalds } 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds /* 3691da177e4SLinus Torvalds ** pulls a cnode off the free list, or returns NULL on failure 3701da177e4SLinus Torvalds */ 371a9dd3643SJeff Mahoney static struct reiserfs_journal_cnode *get_cnode(struct super_block *sb) 372bd4c625cSLinus Torvalds { 3731da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 374a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 3751da177e4SLinus Torvalds 376a9dd3643SJeff Mahoney reiserfs_check_lock_depth(sb, "get_cnode"); 3771da177e4SLinus Torvalds 3781da177e4SLinus Torvalds if (journal->j_cnode_free <= 0) { 3791da177e4SLinus Torvalds return NULL; 3801da177e4SLinus Torvalds } 3811da177e4SLinus Torvalds journal->j_cnode_used++; 3821da177e4SLinus Torvalds journal->j_cnode_free--; 3831da177e4SLinus Torvalds cn = journal->j_cnode_free_list; 3841da177e4SLinus Torvalds if (!cn) { 3851da177e4SLinus Torvalds return cn; 3861da177e4SLinus Torvalds } 3871da177e4SLinus Torvalds if (cn->next) { 3881da177e4SLinus Torvalds cn->next->prev = NULL; 3891da177e4SLinus Torvalds } 3901da177e4SLinus Torvalds journal->j_cnode_free_list = cn->next; 3911da177e4SLinus Torvalds memset(cn, 0, sizeof(struct reiserfs_journal_cnode)); 3921da177e4SLinus Torvalds return cn; 3931da177e4SLinus Torvalds } 3941da177e4SLinus Torvalds 3951da177e4SLinus Torvalds /* 3961da177e4SLinus Torvalds ** returns a cnode to the free list 3971da177e4SLinus Torvalds */ 398a9dd3643SJeff Mahoney static void free_cnode(struct super_block *sb, 399bd4c625cSLinus Torvalds struct reiserfs_journal_cnode *cn) 400bd4c625cSLinus Torvalds { 401a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 4021da177e4SLinus Torvalds 403a9dd3643SJeff Mahoney reiserfs_check_lock_depth(sb, "free_cnode"); 4041da177e4SLinus Torvalds 4051da177e4SLinus Torvalds journal->j_cnode_used--; 4061da177e4SLinus Torvalds journal->j_cnode_free++; 4071da177e4SLinus Torvalds /* memset(cn, 0, sizeof(struct reiserfs_journal_cnode)) ; */ 4081da177e4SLinus Torvalds cn->next = journal->j_cnode_free_list; 4091da177e4SLinus Torvalds if (journal->j_cnode_free_list) { 4101da177e4SLinus Torvalds journal->j_cnode_free_list->prev = cn; 4111da177e4SLinus Torvalds } 4121da177e4SLinus Torvalds cn->prev = NULL; /* not needed with the memset, but I might kill the memset, and forget to do this */ 4131da177e4SLinus Torvalds journal->j_cnode_free_list = cn; 4141da177e4SLinus Torvalds } 4151da177e4SLinus Torvalds 416bd4c625cSLinus Torvalds static void clear_prepared_bits(struct buffer_head *bh) 417bd4c625cSLinus Torvalds { 4181da177e4SLinus Torvalds clear_buffer_journal_prepared(bh); 4191da177e4SLinus Torvalds clear_buffer_journal_restore_dirty(bh); 4201da177e4SLinus Torvalds } 4211da177e4SLinus Torvalds 4221da177e4SLinus Torvalds /* return a cnode with same dev, block number and size in table, or null if not found */ 423bd4c625cSLinus Torvalds static inline struct reiserfs_journal_cnode *get_journal_hash_dev(struct 424bd4c625cSLinus Torvalds super_block 425bd4c625cSLinus Torvalds *sb, 426bd4c625cSLinus Torvalds struct 427bd4c625cSLinus Torvalds reiserfs_journal_cnode 428bd4c625cSLinus Torvalds **table, 4291da177e4SLinus Torvalds long bl) 4301da177e4SLinus Torvalds { 4311da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 4321da177e4SLinus Torvalds cn = journal_hash(table, sb, bl); 4331da177e4SLinus Torvalds while (cn) { 4341da177e4SLinus Torvalds if (cn->blocknr == bl && cn->sb == sb) 4351da177e4SLinus Torvalds return cn; 4361da177e4SLinus Torvalds cn = cn->hnext; 4371da177e4SLinus Torvalds } 4381da177e4SLinus Torvalds return (struct reiserfs_journal_cnode *)0; 4391da177e4SLinus Torvalds } 4401da177e4SLinus Torvalds 4411da177e4SLinus Torvalds /* 4421da177e4SLinus Torvalds ** this actually means 'can this block be reallocated yet?'. If you set search_all, a block can only be allocated 4431da177e4SLinus Torvalds ** if it is not in the current transaction, was not freed by the current transaction, and has no chance of ever 4441da177e4SLinus Torvalds ** being overwritten by a replay after crashing. 4451da177e4SLinus Torvalds ** 4461da177e4SLinus Torvalds ** If you don't set search_all, a block can only be allocated if it is not in the current transaction. Since deleting 4471da177e4SLinus Torvalds ** a block removes it from the current transaction, this case should never happen. If you don't set search_all, make 4481da177e4SLinus Torvalds ** sure you never write the block without logging it. 4491da177e4SLinus Torvalds ** 4501da177e4SLinus Torvalds ** next_zero_bit is a suggestion about the next block to try for find_forward. 4511da177e4SLinus Torvalds ** when bl is rejected because it is set in a journal list bitmap, we search 4521da177e4SLinus Torvalds ** for the next zero bit in the bitmap that rejected bl. Then, we return that 4531da177e4SLinus Torvalds ** through next_zero_bit for find_forward to try. 4541da177e4SLinus Torvalds ** 4551da177e4SLinus Torvalds ** Just because we return something in next_zero_bit does not mean we won't 4561da177e4SLinus Torvalds ** reject it on the next call to reiserfs_in_journal 4571da177e4SLinus Torvalds ** 4581da177e4SLinus Torvalds */ 459a9dd3643SJeff Mahoney int reiserfs_in_journal(struct super_block *sb, 4603ee16670SJeff Mahoney unsigned int bmap_nr, int bit_nr, int search_all, 461bd4c625cSLinus Torvalds b_blocknr_t * next_zero_bit) 462bd4c625cSLinus Torvalds { 463a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 4641da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 4651da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb; 4661da177e4SLinus Torvalds int i; 4671da177e4SLinus Torvalds unsigned long bl; 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds *next_zero_bit = 0; /* always start this at zero. */ 4701da177e4SLinus Torvalds 471a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.in_journal); 4721da177e4SLinus Torvalds /* If we aren't doing a search_all, this is a metablock, and it will be logged before use. 4731da177e4SLinus Torvalds ** if we crash before the transaction that freed it commits, this transaction won't 4741da177e4SLinus Torvalds ** have committed either, and the block will never be written 4751da177e4SLinus Torvalds */ 4761da177e4SLinus Torvalds if (search_all) { 4771da177e4SLinus Torvalds for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { 478a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.in_journal_bitmap); 4791da177e4SLinus Torvalds jb = journal->j_list_bitmap + i; 4801da177e4SLinus Torvalds if (jb->journal_list && jb->bitmaps[bmap_nr] && 481bd4c625cSLinus Torvalds test_bit(bit_nr, 482bd4c625cSLinus Torvalds (unsigned long *)jb->bitmaps[bmap_nr]-> 483bd4c625cSLinus Torvalds data)) { 484bd4c625cSLinus Torvalds *next_zero_bit = 485bd4c625cSLinus Torvalds find_next_zero_bit((unsigned long *) 486bd4c625cSLinus Torvalds (jb->bitmaps[bmap_nr]-> 487bd4c625cSLinus Torvalds data), 488a9dd3643SJeff Mahoney sb->s_blocksize << 3, 489bd4c625cSLinus Torvalds bit_nr + 1); 4901da177e4SLinus Torvalds return 1; 4911da177e4SLinus Torvalds } 4921da177e4SLinus Torvalds } 4931da177e4SLinus Torvalds } 4941da177e4SLinus Torvalds 495a9dd3643SJeff Mahoney bl = bmap_nr * (sb->s_blocksize << 3) + bit_nr; 4961da177e4SLinus Torvalds /* is it in any old transactions? */ 497bd4c625cSLinus Torvalds if (search_all 498bd4c625cSLinus Torvalds && (cn = 499a9dd3643SJeff Mahoney get_journal_hash_dev(sb, journal->j_list_hash_table, bl))) { 5001da177e4SLinus Torvalds return 1; 5011da177e4SLinus Torvalds } 5021da177e4SLinus Torvalds 5031da177e4SLinus Torvalds /* is it in the current transaction. This should never happen */ 504a9dd3643SJeff Mahoney if ((cn = get_journal_hash_dev(sb, journal->j_hash_table, bl))) { 5051da177e4SLinus Torvalds BUG(); 5061da177e4SLinus Torvalds return 1; 5071da177e4SLinus Torvalds } 5081da177e4SLinus Torvalds 509a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.in_journal_reusable); 5101da177e4SLinus Torvalds /* safe for reuse */ 5111da177e4SLinus Torvalds return 0; 5121da177e4SLinus Torvalds } 5131da177e4SLinus Torvalds 5141da177e4SLinus Torvalds /* insert cn into table 5151da177e4SLinus Torvalds */ 516bd4c625cSLinus Torvalds static inline void insert_journal_hash(struct reiserfs_journal_cnode **table, 517bd4c625cSLinus Torvalds struct reiserfs_journal_cnode *cn) 518bd4c625cSLinus Torvalds { 5191da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn_orig; 5201da177e4SLinus Torvalds 5211da177e4SLinus Torvalds cn_orig = journal_hash(table, cn->sb, cn->blocknr); 5221da177e4SLinus Torvalds cn->hnext = cn_orig; 5231da177e4SLinus Torvalds cn->hprev = NULL; 5241da177e4SLinus Torvalds if (cn_orig) { 5251da177e4SLinus Torvalds cn_orig->hprev = cn; 5261da177e4SLinus Torvalds } 5271da177e4SLinus Torvalds journal_hash(table, cn->sb, cn->blocknr) = cn; 5281da177e4SLinus Torvalds } 5291da177e4SLinus Torvalds 5301da177e4SLinus Torvalds /* lock the current transaction */ 531a9dd3643SJeff Mahoney static inline void lock_journal(struct super_block *sb) 532bd4c625cSLinus Torvalds { 533a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.lock_journal); 5348ebc4232SFrederic Weisbecker 5358ebc4232SFrederic Weisbecker reiserfs_mutex_lock_safe(&SB_JOURNAL(sb)->j_mutex, sb); 5361da177e4SLinus Torvalds } 5371da177e4SLinus Torvalds 5381da177e4SLinus Torvalds /* unlock the current transaction */ 539a9dd3643SJeff Mahoney static inline void unlock_journal(struct super_block *sb) 540bd4c625cSLinus Torvalds { 541a9dd3643SJeff Mahoney mutex_unlock(&SB_JOURNAL(sb)->j_mutex); 5421da177e4SLinus Torvalds } 5431da177e4SLinus Torvalds 5441da177e4SLinus Torvalds static inline void get_journal_list(struct reiserfs_journal_list *jl) 5451da177e4SLinus Torvalds { 5461da177e4SLinus Torvalds jl->j_refcount++; 5471da177e4SLinus Torvalds } 5481da177e4SLinus Torvalds 5491da177e4SLinus Torvalds static inline void put_journal_list(struct super_block *s, 5501da177e4SLinus Torvalds struct reiserfs_journal_list *jl) 5511da177e4SLinus Torvalds { 5521da177e4SLinus Torvalds if (jl->j_refcount < 1) { 553c3a9c210SJeff Mahoney reiserfs_panic(s, "journal-2", "trans id %u, refcount at %d", 554bd4c625cSLinus Torvalds jl->j_trans_id, jl->j_refcount); 5551da177e4SLinus Torvalds } 5561da177e4SLinus Torvalds if (--jl->j_refcount == 0) 557d739b42bSPekka Enberg kfree(jl); 5581da177e4SLinus Torvalds } 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds /* 5611da177e4SLinus Torvalds ** this used to be much more involved, and I'm keeping it just in case things get ugly again. 5621da177e4SLinus Torvalds ** it gets called by flush_commit_list, and cleans up any data stored about blocks freed during a 5631da177e4SLinus Torvalds ** transaction. 5641da177e4SLinus Torvalds */ 565a9dd3643SJeff Mahoney static void cleanup_freed_for_journal_list(struct super_block *sb, 566bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl) 567bd4c625cSLinus Torvalds { 5681da177e4SLinus Torvalds 5691da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb = jl->j_list_bitmap; 5701da177e4SLinus Torvalds if (jb) { 571a9dd3643SJeff Mahoney cleanup_bitmap_list(sb, jb); 5721da177e4SLinus Torvalds } 5731da177e4SLinus Torvalds jl->j_list_bitmap->journal_list = NULL; 5741da177e4SLinus Torvalds jl->j_list_bitmap = NULL; 5751da177e4SLinus Torvalds } 5761da177e4SLinus Torvalds 5771da177e4SLinus Torvalds static int journal_list_still_alive(struct super_block *s, 578600ed416SJeff Mahoney unsigned int trans_id) 5791da177e4SLinus Torvalds { 5801da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 5811da177e4SLinus Torvalds struct list_head *entry = &journal->j_journal_list; 5821da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 5831da177e4SLinus Torvalds 5841da177e4SLinus Torvalds if (!list_empty(entry)) { 5851da177e4SLinus Torvalds jl = JOURNAL_LIST_ENTRY(entry->next); 5861da177e4SLinus Torvalds if (jl->j_trans_id <= trans_id) { 5871da177e4SLinus Torvalds return 1; 5881da177e4SLinus Torvalds } 5891da177e4SLinus Torvalds } 5901da177e4SLinus Torvalds return 0; 5911da177e4SLinus Torvalds } 5921da177e4SLinus Torvalds 593398c95bdSChris Mason /* 594398c95bdSChris Mason * If page->mapping was null, we failed to truncate this page for 595398c95bdSChris Mason * some reason. Most likely because it was truncated after being 596398c95bdSChris Mason * logged via data=journal. 597398c95bdSChris Mason * 598398c95bdSChris Mason * This does a check to see if the buffer belongs to one of these 599398c95bdSChris Mason * lost pages before doing the final put_bh. If page->mapping was 600398c95bdSChris Mason * null, it tries to free buffers on the page, which should make the 601398c95bdSChris Mason * final page_cache_release drop the page from the lru. 602398c95bdSChris Mason */ 603398c95bdSChris Mason static void release_buffer_page(struct buffer_head *bh) 604398c95bdSChris Mason { 605398c95bdSChris Mason struct page *page = bh->b_page; 606529ae9aaSNick Piggin if (!page->mapping && trylock_page(page)) { 607398c95bdSChris Mason page_cache_get(page); 608398c95bdSChris Mason put_bh(bh); 609398c95bdSChris Mason if (!page->mapping) 610398c95bdSChris Mason try_to_free_buffers(page); 611398c95bdSChris Mason unlock_page(page); 612398c95bdSChris Mason page_cache_release(page); 613398c95bdSChris Mason } else { 614398c95bdSChris Mason put_bh(bh); 615398c95bdSChris Mason } 616398c95bdSChris Mason } 617398c95bdSChris Mason 618bd4c625cSLinus Torvalds static void reiserfs_end_buffer_io_sync(struct buffer_head *bh, int uptodate) 619bd4c625cSLinus Torvalds { 6201da177e4SLinus Torvalds char b[BDEVNAME_SIZE]; 6211da177e4SLinus Torvalds 6221da177e4SLinus Torvalds if (buffer_journaled(bh)) { 62345b03d5eSJeff Mahoney reiserfs_warning(NULL, "clm-2084", 62445b03d5eSJeff Mahoney "pinned buffer %lu:%s sent to disk", 6251da177e4SLinus Torvalds bh->b_blocknr, bdevname(bh->b_bdev, b)); 6261da177e4SLinus Torvalds } 6271da177e4SLinus Torvalds if (uptodate) 6281da177e4SLinus Torvalds set_buffer_uptodate(bh); 6291da177e4SLinus Torvalds else 6301da177e4SLinus Torvalds clear_buffer_uptodate(bh); 631398c95bdSChris Mason 6321da177e4SLinus Torvalds unlock_buffer(bh); 633398c95bdSChris Mason release_buffer_page(bh); 6341da177e4SLinus Torvalds } 6351da177e4SLinus Torvalds 636bd4c625cSLinus Torvalds static void reiserfs_end_ordered_io(struct buffer_head *bh, int uptodate) 637bd4c625cSLinus Torvalds { 6381da177e4SLinus Torvalds if (uptodate) 6391da177e4SLinus Torvalds set_buffer_uptodate(bh); 6401da177e4SLinus Torvalds else 6411da177e4SLinus Torvalds clear_buffer_uptodate(bh); 6421da177e4SLinus Torvalds unlock_buffer(bh); 6431da177e4SLinus Torvalds put_bh(bh); 6441da177e4SLinus Torvalds } 6451da177e4SLinus Torvalds 646bd4c625cSLinus Torvalds static void submit_logged_buffer(struct buffer_head *bh) 647bd4c625cSLinus Torvalds { 6481da177e4SLinus Torvalds get_bh(bh); 6491da177e4SLinus Torvalds bh->b_end_io = reiserfs_end_buffer_io_sync; 6501da177e4SLinus Torvalds clear_buffer_journal_new(bh); 6511da177e4SLinus Torvalds clear_buffer_dirty(bh); 6521da177e4SLinus Torvalds if (!test_clear_buffer_journal_test(bh)) 6531da177e4SLinus Torvalds BUG(); 6541da177e4SLinus Torvalds if (!buffer_uptodate(bh)) 6551da177e4SLinus Torvalds BUG(); 6561da177e4SLinus Torvalds submit_bh(WRITE, bh); 6571da177e4SLinus Torvalds } 6581da177e4SLinus Torvalds 659bd4c625cSLinus Torvalds static void submit_ordered_buffer(struct buffer_head *bh) 660bd4c625cSLinus Torvalds { 6611da177e4SLinus Torvalds get_bh(bh); 6621da177e4SLinus Torvalds bh->b_end_io = reiserfs_end_ordered_io; 6631da177e4SLinus Torvalds clear_buffer_dirty(bh); 6641da177e4SLinus Torvalds if (!buffer_uptodate(bh)) 6651da177e4SLinus Torvalds BUG(); 6661da177e4SLinus Torvalds submit_bh(WRITE, bh); 6671da177e4SLinus Torvalds } 6681da177e4SLinus Torvalds 6691da177e4SLinus Torvalds #define CHUNK_SIZE 32 6701da177e4SLinus Torvalds struct buffer_chunk { 6711da177e4SLinus Torvalds struct buffer_head *bh[CHUNK_SIZE]; 6721da177e4SLinus Torvalds int nr; 6731da177e4SLinus Torvalds }; 6741da177e4SLinus Torvalds 675bd4c625cSLinus Torvalds static void write_chunk(struct buffer_chunk *chunk) 676bd4c625cSLinus Torvalds { 6771da177e4SLinus Torvalds int i; 6781da177e4SLinus Torvalds for (i = 0; i < chunk->nr; i++) { 6791da177e4SLinus Torvalds submit_logged_buffer(chunk->bh[i]); 6801da177e4SLinus Torvalds } 6811da177e4SLinus Torvalds chunk->nr = 0; 6821da177e4SLinus Torvalds } 6831da177e4SLinus Torvalds 684bd4c625cSLinus Torvalds static void write_ordered_chunk(struct buffer_chunk *chunk) 685bd4c625cSLinus Torvalds { 6861da177e4SLinus Torvalds int i; 6871da177e4SLinus Torvalds for (i = 0; i < chunk->nr; i++) { 6881da177e4SLinus Torvalds submit_ordered_buffer(chunk->bh[i]); 6891da177e4SLinus Torvalds } 6901da177e4SLinus Torvalds chunk->nr = 0; 6911da177e4SLinus Torvalds } 6921da177e4SLinus Torvalds 6931da177e4SLinus Torvalds static int add_to_chunk(struct buffer_chunk *chunk, struct buffer_head *bh, 694bd4c625cSLinus Torvalds spinlock_t * lock, void (fn) (struct buffer_chunk *)) 6951da177e4SLinus Torvalds { 6961da177e4SLinus Torvalds int ret = 0; 69714a61442SEric Sesterhenn BUG_ON(chunk->nr >= CHUNK_SIZE); 6981da177e4SLinus Torvalds chunk->bh[chunk->nr++] = bh; 6991da177e4SLinus Torvalds if (chunk->nr >= CHUNK_SIZE) { 7001da177e4SLinus Torvalds ret = 1; 7011da177e4SLinus Torvalds if (lock) 7021da177e4SLinus Torvalds spin_unlock(lock); 7031da177e4SLinus Torvalds fn(chunk); 7041da177e4SLinus Torvalds if (lock) 7051da177e4SLinus Torvalds spin_lock(lock); 7061da177e4SLinus Torvalds } 7071da177e4SLinus Torvalds return ret; 7081da177e4SLinus Torvalds } 7091da177e4SLinus Torvalds 7101da177e4SLinus Torvalds static atomic_t nr_reiserfs_jh = ATOMIC_INIT(0); 711bd4c625cSLinus Torvalds static struct reiserfs_jh *alloc_jh(void) 712bd4c625cSLinus Torvalds { 7131da177e4SLinus Torvalds struct reiserfs_jh *jh; 7141da177e4SLinus Torvalds while (1) { 7151da177e4SLinus Torvalds jh = kmalloc(sizeof(*jh), GFP_NOFS); 7161da177e4SLinus Torvalds if (jh) { 7171da177e4SLinus Torvalds atomic_inc(&nr_reiserfs_jh); 7181da177e4SLinus Torvalds return jh; 7191da177e4SLinus Torvalds } 7201da177e4SLinus Torvalds yield(); 7211da177e4SLinus Torvalds } 7221da177e4SLinus Torvalds } 7231da177e4SLinus Torvalds 7241da177e4SLinus Torvalds /* 7251da177e4SLinus Torvalds * we want to free the jh when the buffer has been written 7261da177e4SLinus Torvalds * and waited on 7271da177e4SLinus Torvalds */ 728bd4c625cSLinus Torvalds void reiserfs_free_jh(struct buffer_head *bh) 729bd4c625cSLinus Torvalds { 7301da177e4SLinus Torvalds struct reiserfs_jh *jh; 7311da177e4SLinus Torvalds 7321da177e4SLinus Torvalds jh = bh->b_private; 7331da177e4SLinus Torvalds if (jh) { 7341da177e4SLinus Torvalds bh->b_private = NULL; 7351da177e4SLinus Torvalds jh->bh = NULL; 7361da177e4SLinus Torvalds list_del_init(&jh->list); 7371da177e4SLinus Torvalds kfree(jh); 7381da177e4SLinus Torvalds if (atomic_read(&nr_reiserfs_jh) <= 0) 7391da177e4SLinus Torvalds BUG(); 7401da177e4SLinus Torvalds atomic_dec(&nr_reiserfs_jh); 7411da177e4SLinus Torvalds put_bh(bh); 7421da177e4SLinus Torvalds } 7431da177e4SLinus Torvalds } 7441da177e4SLinus Torvalds 7451da177e4SLinus Torvalds static inline int __add_jh(struct reiserfs_journal *j, struct buffer_head *bh, 7461da177e4SLinus Torvalds int tail) 7471da177e4SLinus Torvalds { 7481da177e4SLinus Torvalds struct reiserfs_jh *jh; 7491da177e4SLinus Torvalds 7501da177e4SLinus Torvalds if (bh->b_private) { 7511da177e4SLinus Torvalds spin_lock(&j->j_dirty_buffers_lock); 7521da177e4SLinus Torvalds if (!bh->b_private) { 7531da177e4SLinus Torvalds spin_unlock(&j->j_dirty_buffers_lock); 7541da177e4SLinus Torvalds goto no_jh; 7551da177e4SLinus Torvalds } 7561da177e4SLinus Torvalds jh = bh->b_private; 7571da177e4SLinus Torvalds list_del_init(&jh->list); 7581da177e4SLinus Torvalds } else { 7591da177e4SLinus Torvalds no_jh: 7601da177e4SLinus Torvalds get_bh(bh); 7611da177e4SLinus Torvalds jh = alloc_jh(); 7621da177e4SLinus Torvalds spin_lock(&j->j_dirty_buffers_lock); 7631da177e4SLinus Torvalds /* buffer must be locked for __add_jh, should be able to have 7641da177e4SLinus Torvalds * two adds at the same time 7651da177e4SLinus Torvalds */ 76614a61442SEric Sesterhenn BUG_ON(bh->b_private); 7671da177e4SLinus Torvalds jh->bh = bh; 7681da177e4SLinus Torvalds bh->b_private = jh; 7691da177e4SLinus Torvalds } 7701da177e4SLinus Torvalds jh->jl = j->j_current_jl; 7711da177e4SLinus Torvalds if (tail) 7721da177e4SLinus Torvalds list_add_tail(&jh->list, &jh->jl->j_tail_bh_list); 7731da177e4SLinus Torvalds else { 7741da177e4SLinus Torvalds list_add_tail(&jh->list, &jh->jl->j_bh_list); 7751da177e4SLinus Torvalds } 7761da177e4SLinus Torvalds spin_unlock(&j->j_dirty_buffers_lock); 7771da177e4SLinus Torvalds return 0; 7781da177e4SLinus Torvalds } 7791da177e4SLinus Torvalds 780bd4c625cSLinus Torvalds int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh) 781bd4c625cSLinus Torvalds { 7821da177e4SLinus Torvalds return __add_jh(SB_JOURNAL(inode->i_sb), bh, 1); 7831da177e4SLinus Torvalds } 784bd4c625cSLinus Torvalds int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh) 785bd4c625cSLinus Torvalds { 7861da177e4SLinus Torvalds return __add_jh(SB_JOURNAL(inode->i_sb), bh, 0); 7871da177e4SLinus Torvalds } 7881da177e4SLinus Torvalds 7891da177e4SLinus Torvalds #define JH_ENTRY(l) list_entry((l), struct reiserfs_jh, list) 7901da177e4SLinus Torvalds static int write_ordered_buffers(spinlock_t * lock, 7911da177e4SLinus Torvalds struct reiserfs_journal *j, 7921da177e4SLinus Torvalds struct reiserfs_journal_list *jl, 7931da177e4SLinus Torvalds struct list_head *list) 7941da177e4SLinus Torvalds { 7951da177e4SLinus Torvalds struct buffer_head *bh; 7961da177e4SLinus Torvalds struct reiserfs_jh *jh; 7971da177e4SLinus Torvalds int ret = j->j_errno; 7981da177e4SLinus Torvalds struct buffer_chunk chunk; 7991da177e4SLinus Torvalds struct list_head tmp; 8001da177e4SLinus Torvalds INIT_LIST_HEAD(&tmp); 8011da177e4SLinus Torvalds 8021da177e4SLinus Torvalds chunk.nr = 0; 8031da177e4SLinus Torvalds spin_lock(lock); 8041da177e4SLinus Torvalds while (!list_empty(list)) { 8051da177e4SLinus Torvalds jh = JH_ENTRY(list->next); 8061da177e4SLinus Torvalds bh = jh->bh; 8071da177e4SLinus Torvalds get_bh(bh); 808ca5de404SNick Piggin if (!trylock_buffer(bh)) { 8091da177e4SLinus Torvalds if (!buffer_dirty(bh)) { 810f116629dSAkinobu Mita list_move(&jh->list, &tmp); 8111da177e4SLinus Torvalds goto loop_next; 8121da177e4SLinus Torvalds } 8131da177e4SLinus Torvalds spin_unlock(lock); 8141da177e4SLinus Torvalds if (chunk.nr) 8151da177e4SLinus Torvalds write_ordered_chunk(&chunk); 8161da177e4SLinus Torvalds wait_on_buffer(bh); 8171da177e4SLinus Torvalds cond_resched(); 8181da177e4SLinus Torvalds spin_lock(lock); 8191da177e4SLinus Torvalds goto loop_next; 8201da177e4SLinus Torvalds } 8213d4492f8SChris Mason /* in theory, dirty non-uptodate buffers should never get here, 8223d4492f8SChris Mason * but the upper layer io error paths still have a few quirks. 8233d4492f8SChris Mason * Handle them here as gracefully as we can 8243d4492f8SChris Mason */ 8253d4492f8SChris Mason if (!buffer_uptodate(bh) && buffer_dirty(bh)) { 8263d4492f8SChris Mason clear_buffer_dirty(bh); 8273d4492f8SChris Mason ret = -EIO; 8283d4492f8SChris Mason } 8291da177e4SLinus Torvalds if (buffer_dirty(bh)) { 830f116629dSAkinobu Mita list_move(&jh->list, &tmp); 8311da177e4SLinus Torvalds add_to_chunk(&chunk, bh, lock, write_ordered_chunk); 8321da177e4SLinus Torvalds } else { 8331da177e4SLinus Torvalds reiserfs_free_jh(bh); 8341da177e4SLinus Torvalds unlock_buffer(bh); 8351da177e4SLinus Torvalds } 8361da177e4SLinus Torvalds loop_next: 8371da177e4SLinus Torvalds put_bh(bh); 8381da177e4SLinus Torvalds cond_resched_lock(lock); 8391da177e4SLinus Torvalds } 8401da177e4SLinus Torvalds if (chunk.nr) { 8411da177e4SLinus Torvalds spin_unlock(lock); 8421da177e4SLinus Torvalds write_ordered_chunk(&chunk); 8431da177e4SLinus Torvalds spin_lock(lock); 8441da177e4SLinus Torvalds } 8451da177e4SLinus Torvalds while (!list_empty(&tmp)) { 8461da177e4SLinus Torvalds jh = JH_ENTRY(tmp.prev); 8471da177e4SLinus Torvalds bh = jh->bh; 8481da177e4SLinus Torvalds get_bh(bh); 8491da177e4SLinus Torvalds reiserfs_free_jh(bh); 8501da177e4SLinus Torvalds 8511da177e4SLinus Torvalds if (buffer_locked(bh)) { 8521da177e4SLinus Torvalds spin_unlock(lock); 8531da177e4SLinus Torvalds wait_on_buffer(bh); 8541da177e4SLinus Torvalds spin_lock(lock); 8551da177e4SLinus Torvalds } 8561da177e4SLinus Torvalds if (!buffer_uptodate(bh)) { 8571da177e4SLinus Torvalds ret = -EIO; 8581da177e4SLinus Torvalds } 859d62b1b87SChris Mason /* ugly interaction with invalidatepage here. 860d62b1b87SChris Mason * reiserfs_invalidate_page will pin any buffer that has a valid 861d62b1b87SChris Mason * journal head from an older transaction. If someone else sets 862d62b1b87SChris Mason * our buffer dirty after we write it in the first loop, and 863d62b1b87SChris Mason * then someone truncates the page away, nobody will ever write 864d62b1b87SChris Mason * the buffer. We're safe if we write the page one last time 865d62b1b87SChris Mason * after freeing the journal header. 866d62b1b87SChris Mason */ 867d62b1b87SChris Mason if (buffer_dirty(bh) && unlikely(bh->b_page->mapping == NULL)) { 868d62b1b87SChris Mason spin_unlock(lock); 869d62b1b87SChris Mason ll_rw_block(WRITE, 1, &bh); 870d62b1b87SChris Mason spin_lock(lock); 871d62b1b87SChris Mason } 8721da177e4SLinus Torvalds put_bh(bh); 8731da177e4SLinus Torvalds cond_resched_lock(lock); 8741da177e4SLinus Torvalds } 8751da177e4SLinus Torvalds spin_unlock(lock); 8761da177e4SLinus Torvalds return ret; 8771da177e4SLinus Torvalds } 8781da177e4SLinus Torvalds 879bd4c625cSLinus Torvalds static int flush_older_commits(struct super_block *s, 880bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl) 881bd4c625cSLinus Torvalds { 8821da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 8831da177e4SLinus Torvalds struct reiserfs_journal_list *other_jl; 8841da177e4SLinus Torvalds struct reiserfs_journal_list *first_jl; 8851da177e4SLinus Torvalds struct list_head *entry; 886600ed416SJeff Mahoney unsigned int trans_id = jl->j_trans_id; 887600ed416SJeff Mahoney unsigned int other_trans_id; 888600ed416SJeff Mahoney unsigned int first_trans_id; 8891da177e4SLinus Torvalds 8901da177e4SLinus Torvalds find_first: 8911da177e4SLinus Torvalds /* 8921da177e4SLinus Torvalds * first we walk backwards to find the oldest uncommitted transation 8931da177e4SLinus Torvalds */ 8941da177e4SLinus Torvalds first_jl = jl; 8951da177e4SLinus Torvalds entry = jl->j_list.prev; 8961da177e4SLinus Torvalds while (1) { 8971da177e4SLinus Torvalds other_jl = JOURNAL_LIST_ENTRY(entry); 8981da177e4SLinus Torvalds if (entry == &journal->j_journal_list || 8991da177e4SLinus Torvalds atomic_read(&other_jl->j_older_commits_done)) 9001da177e4SLinus Torvalds break; 9011da177e4SLinus Torvalds 9021da177e4SLinus Torvalds first_jl = other_jl; 9031da177e4SLinus Torvalds entry = other_jl->j_list.prev; 9041da177e4SLinus Torvalds } 9051da177e4SLinus Torvalds 9061da177e4SLinus Torvalds /* if we didn't find any older uncommitted transactions, return now */ 9071da177e4SLinus Torvalds if (first_jl == jl) { 9081da177e4SLinus Torvalds return 0; 9091da177e4SLinus Torvalds } 9101da177e4SLinus Torvalds 9111da177e4SLinus Torvalds first_trans_id = first_jl->j_trans_id; 9121da177e4SLinus Torvalds 9131da177e4SLinus Torvalds entry = &first_jl->j_list; 9141da177e4SLinus Torvalds while (1) { 9151da177e4SLinus Torvalds other_jl = JOURNAL_LIST_ENTRY(entry); 9161da177e4SLinus Torvalds other_trans_id = other_jl->j_trans_id; 9171da177e4SLinus Torvalds 9181da177e4SLinus Torvalds if (other_trans_id < trans_id) { 9191da177e4SLinus Torvalds if (atomic_read(&other_jl->j_commit_left) != 0) { 9201da177e4SLinus Torvalds flush_commit_list(s, other_jl, 0); 9211da177e4SLinus Torvalds 9221da177e4SLinus Torvalds /* list we were called with is gone, return */ 9231da177e4SLinus Torvalds if (!journal_list_still_alive(s, trans_id)) 9241da177e4SLinus Torvalds return 1; 9251da177e4SLinus Torvalds 9261da177e4SLinus Torvalds /* the one we just flushed is gone, this means all 9271da177e4SLinus Torvalds * older lists are also gone, so first_jl is no longer 9281da177e4SLinus Torvalds * valid either. Go back to the beginning. 9291da177e4SLinus Torvalds */ 930bd4c625cSLinus Torvalds if (!journal_list_still_alive 931bd4c625cSLinus Torvalds (s, other_trans_id)) { 9321da177e4SLinus Torvalds goto find_first; 9331da177e4SLinus Torvalds } 9341da177e4SLinus Torvalds } 9351da177e4SLinus Torvalds entry = entry->next; 9361da177e4SLinus Torvalds if (entry == &journal->j_journal_list) 9371da177e4SLinus Torvalds return 0; 9381da177e4SLinus Torvalds } else { 9391da177e4SLinus Torvalds return 0; 9401da177e4SLinus Torvalds } 9411da177e4SLinus Torvalds } 9421da177e4SLinus Torvalds return 0; 9431da177e4SLinus Torvalds } 944deba0f49SAdrian Bunk 945deba0f49SAdrian Bunk static int reiserfs_async_progress_wait(struct super_block *s) 946bd4c625cSLinus Torvalds { 9471da177e4SLinus Torvalds struct reiserfs_journal *j = SB_JOURNAL(s); 9488ebc4232SFrederic Weisbecker 9498ebc4232SFrederic Weisbecker if (atomic_read(&j->j_async_throttle)) { 9508ebc4232SFrederic Weisbecker reiserfs_write_unlock(s); 9518aa7e847SJens Axboe congestion_wait(BLK_RW_ASYNC, HZ / 10); 9528ebc4232SFrederic Weisbecker reiserfs_write_lock(s); 9538ebc4232SFrederic Weisbecker } 9548ebc4232SFrederic Weisbecker 9551da177e4SLinus Torvalds return 0; 9561da177e4SLinus Torvalds } 9571da177e4SLinus Torvalds 9581da177e4SLinus Torvalds /* 9591da177e4SLinus Torvalds ** if this journal list still has commit blocks unflushed, send them to disk. 9601da177e4SLinus Torvalds ** 9611da177e4SLinus Torvalds ** log areas must be flushed in order (transaction 2 can't commit before transaction 1) 9621da177e4SLinus Torvalds ** Before the commit block can by written, every other log block must be safely on disk 9631da177e4SLinus Torvalds ** 9641da177e4SLinus Torvalds */ 965bd4c625cSLinus Torvalds static int flush_commit_list(struct super_block *s, 966bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl, int flushall) 967bd4c625cSLinus Torvalds { 9681da177e4SLinus Torvalds int i; 9693ee16670SJeff Mahoney b_blocknr_t bn; 9701da177e4SLinus Torvalds struct buffer_head *tbh = NULL; 971600ed416SJeff Mahoney unsigned int trans_id = jl->j_trans_id; 9721da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 9731da177e4SLinus Torvalds int retval = 0; 974e0e851cfSChris Mason int write_len; 9751da177e4SLinus Torvalds 9761da177e4SLinus Torvalds reiserfs_check_lock_depth(s, "flush_commit_list"); 9771da177e4SLinus Torvalds 9781da177e4SLinus Torvalds if (atomic_read(&jl->j_older_commits_done)) { 9791da177e4SLinus Torvalds return 0; 9801da177e4SLinus Torvalds } 9811da177e4SLinus Torvalds 9821da177e4SLinus Torvalds /* before we can put our commit blocks on disk, we have to make sure everyone older than 9831da177e4SLinus Torvalds ** us is on disk too 9841da177e4SLinus Torvalds */ 9851da177e4SLinus Torvalds BUG_ON(jl->j_len <= 0); 9861da177e4SLinus Torvalds BUG_ON(trans_id == journal->j_trans_id); 9871da177e4SLinus Torvalds 9881da177e4SLinus Torvalds get_journal_list(jl); 9891da177e4SLinus Torvalds if (flushall) { 9901da177e4SLinus Torvalds if (flush_older_commits(s, jl) == 1) { 9911da177e4SLinus Torvalds /* list disappeared during flush_older_commits. return */ 9921da177e4SLinus Torvalds goto put_jl; 9931da177e4SLinus Torvalds } 9941da177e4SLinus Torvalds } 9951da177e4SLinus Torvalds 9961da177e4SLinus Torvalds /* make sure nobody is trying to flush this one at the same time */ 9978ebc4232SFrederic Weisbecker reiserfs_mutex_lock_safe(&jl->j_commit_mutex, s); 9988ebc4232SFrederic Weisbecker 9991da177e4SLinus Torvalds if (!journal_list_still_alive(s, trans_id)) { 100090415deaSJeff Mahoney mutex_unlock(&jl->j_commit_mutex); 10011da177e4SLinus Torvalds goto put_jl; 10021da177e4SLinus Torvalds } 10031da177e4SLinus Torvalds BUG_ON(jl->j_trans_id == 0); 10041da177e4SLinus Torvalds 10051da177e4SLinus Torvalds /* this commit is done, exit */ 10061da177e4SLinus Torvalds if (atomic_read(&(jl->j_commit_left)) <= 0) { 10071da177e4SLinus Torvalds if (flushall) { 10081da177e4SLinus Torvalds atomic_set(&(jl->j_older_commits_done), 1); 10091da177e4SLinus Torvalds } 101090415deaSJeff Mahoney mutex_unlock(&jl->j_commit_mutex); 10111da177e4SLinus Torvalds goto put_jl; 10121da177e4SLinus Torvalds } 10131da177e4SLinus Torvalds 10141da177e4SLinus Torvalds if (!list_empty(&jl->j_bh_list)) { 10153d4492f8SChris Mason int ret; 10168ebc4232SFrederic Weisbecker 10178ebc4232SFrederic Weisbecker /* 10188ebc4232SFrederic Weisbecker * We might sleep in numerous places inside 10198ebc4232SFrederic Weisbecker * write_ordered_buffers. Relax the write lock. 10208ebc4232SFrederic Weisbecker */ 10218ebc4232SFrederic Weisbecker reiserfs_write_unlock(s); 10223d4492f8SChris Mason ret = write_ordered_buffers(&journal->j_dirty_buffers_lock, 10231da177e4SLinus Torvalds journal, jl, &jl->j_bh_list); 10243d4492f8SChris Mason if (ret < 0 && retval == 0) 10253d4492f8SChris Mason retval = ret; 10268ebc4232SFrederic Weisbecker reiserfs_write_lock(s); 10271da177e4SLinus Torvalds } 10281da177e4SLinus Torvalds BUG_ON(!list_empty(&jl->j_bh_list)); 10291da177e4SLinus Torvalds /* 10301da177e4SLinus Torvalds * for the description block and all the log blocks, submit any buffers 1031e0e851cfSChris Mason * that haven't already reached the disk. Try to write at least 256 1032e0e851cfSChris Mason * log blocks. later on, we will only wait on blocks that correspond 1033e0e851cfSChris Mason * to this transaction, but while we're unplugging we might as well 1034e0e851cfSChris Mason * get a chunk of data on there. 10351da177e4SLinus Torvalds */ 10361da177e4SLinus Torvalds atomic_inc(&journal->j_async_throttle); 1037e0e851cfSChris Mason write_len = jl->j_len + 1; 1038e0e851cfSChris Mason if (write_len < 256) 1039e0e851cfSChris Mason write_len = 256; 1040e0e851cfSChris Mason for (i = 0 ; i < write_len ; i++) { 10411da177e4SLinus Torvalds bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + (jl->j_start + i) % 10421da177e4SLinus Torvalds SB_ONDISK_JOURNAL_SIZE(s); 10431da177e4SLinus Torvalds tbh = journal_find_get_block(s, bn); 1044e0e851cfSChris Mason if (tbh) { 10456e3647acSFrederic Weisbecker if (buffer_dirty(tbh)) { 10466e3647acSFrederic Weisbecker reiserfs_write_unlock(s); 1047e0e851cfSChris Mason ll_rw_block(WRITE, 1, &tbh); 10486e3647acSFrederic Weisbecker reiserfs_write_lock(s); 10496e3647acSFrederic Weisbecker } 10501da177e4SLinus Torvalds put_bh(tbh) ; 10511da177e4SLinus Torvalds } 1052e0e851cfSChris Mason } 10531da177e4SLinus Torvalds atomic_dec(&journal->j_async_throttle); 10541da177e4SLinus Torvalds 10551da177e4SLinus Torvalds for (i = 0; i < (jl->j_len + 1); i++) { 10561da177e4SLinus Torvalds bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + 10571da177e4SLinus Torvalds (jl->j_start + i) % SB_ONDISK_JOURNAL_SIZE(s); 10581da177e4SLinus Torvalds tbh = journal_find_get_block(s, bn); 10598ebc4232SFrederic Weisbecker 10608ebc4232SFrederic Weisbecker reiserfs_write_unlock(s); 10611da177e4SLinus Torvalds wait_on_buffer(tbh); 10628ebc4232SFrederic Weisbecker reiserfs_write_lock(s); 10631da177e4SLinus Torvalds // since we're using ll_rw_blk above, it might have skipped over 10641da177e4SLinus Torvalds // a locked buffer. Double check here 10651da177e4SLinus Torvalds // 10668ebc4232SFrederic Weisbecker /* redundant, sync_dirty_buffer() checks */ 10678ebc4232SFrederic Weisbecker if (buffer_dirty(tbh)) { 10688ebc4232SFrederic Weisbecker reiserfs_write_unlock(s); 10691da177e4SLinus Torvalds sync_dirty_buffer(tbh); 10708ebc4232SFrederic Weisbecker reiserfs_write_lock(s); 10718ebc4232SFrederic Weisbecker } 10721da177e4SLinus Torvalds if (unlikely(!buffer_uptodate(tbh))) { 10731da177e4SLinus Torvalds #ifdef CONFIG_REISERFS_CHECK 107445b03d5eSJeff Mahoney reiserfs_warning(s, "journal-601", 107545b03d5eSJeff Mahoney "buffer write failed"); 10761da177e4SLinus Torvalds #endif 10771da177e4SLinus Torvalds retval = -EIO; 10781da177e4SLinus Torvalds } 10791da177e4SLinus Torvalds put_bh(tbh); /* once for journal_find_get_block */ 10801da177e4SLinus Torvalds put_bh(tbh); /* once due to original getblk in do_journal_end */ 10811da177e4SLinus Torvalds atomic_dec(&(jl->j_commit_left)); 10821da177e4SLinus Torvalds } 10831da177e4SLinus Torvalds 10841da177e4SLinus Torvalds BUG_ON(atomic_read(&(jl->j_commit_left)) != 1); 10851da177e4SLinus Torvalds 10865d5e8156SJeff Mahoney /* If there was a write error in the journal - we can't commit 10875d5e8156SJeff Mahoney * this transaction - it will be invalid and, if successful, 1088beb7dd86SRobert P. J. Day * will just end up propagating the write error out to 10895d5e8156SJeff Mahoney * the file system. */ 10905d5e8156SJeff Mahoney if (likely(!retval && !reiserfs_is_journal_aborted (journal))) { 10911da177e4SLinus Torvalds if (buffer_dirty(jl->j_commit_bh)) 10921da177e4SLinus Torvalds BUG(); 10931da177e4SLinus Torvalds mark_buffer_dirty(jl->j_commit_bh) ; 10948ebc4232SFrederic Weisbecker reiserfs_write_unlock(s); 10957cd33ad2SChristoph Hellwig if (reiserfs_barrier_flush(s)) 10967cd33ad2SChristoph Hellwig __sync_dirty_buffer(jl->j_commit_bh, WRITE_FLUSH_FUA); 10977cd33ad2SChristoph Hellwig else 10981da177e4SLinus Torvalds sync_dirty_buffer(jl->j_commit_bh); 10998ebc4232SFrederic Weisbecker reiserfs_write_lock(s); 11005d5e8156SJeff Mahoney } 11011da177e4SLinus Torvalds 11021da177e4SLinus Torvalds /* If there was a write error in the journal - we can't commit this 11031da177e4SLinus Torvalds * transaction - it will be invalid and, if successful, will just end 1104beb7dd86SRobert P. J. Day * up propagating the write error out to the filesystem. */ 11051da177e4SLinus Torvalds if (unlikely(!buffer_uptodate(jl->j_commit_bh))) { 11061da177e4SLinus Torvalds #ifdef CONFIG_REISERFS_CHECK 110745b03d5eSJeff Mahoney reiserfs_warning(s, "journal-615", "buffer write failed"); 11081da177e4SLinus Torvalds #endif 11091da177e4SLinus Torvalds retval = -EIO; 11101da177e4SLinus Torvalds } 11111da177e4SLinus Torvalds bforget(jl->j_commit_bh); 11121da177e4SLinus Torvalds if (journal->j_last_commit_id != 0 && 11131da177e4SLinus Torvalds (jl->j_trans_id - journal->j_last_commit_id) != 1) { 111445b03d5eSJeff Mahoney reiserfs_warning(s, "clm-2200", "last commit %lu, current %lu", 1115bd4c625cSLinus Torvalds journal->j_last_commit_id, jl->j_trans_id); 11161da177e4SLinus Torvalds } 11171da177e4SLinus Torvalds journal->j_last_commit_id = jl->j_trans_id; 11181da177e4SLinus Torvalds 11191da177e4SLinus Torvalds /* now, every commit block is on the disk. It is safe to allow blocks freed during this transaction to be reallocated */ 11201da177e4SLinus Torvalds cleanup_freed_for_journal_list(s, jl); 11211da177e4SLinus Torvalds 11221da177e4SLinus Torvalds retval = retval ? retval : journal->j_errno; 11231da177e4SLinus Torvalds 11241da177e4SLinus Torvalds /* mark the metadata dirty */ 11251da177e4SLinus Torvalds if (!retval) 11261da177e4SLinus Torvalds dirty_one_transaction(s, jl); 11271da177e4SLinus Torvalds atomic_dec(&(jl->j_commit_left)); 11281da177e4SLinus Torvalds 11291da177e4SLinus Torvalds if (flushall) { 11301da177e4SLinus Torvalds atomic_set(&(jl->j_older_commits_done), 1); 11311da177e4SLinus Torvalds } 113290415deaSJeff Mahoney mutex_unlock(&jl->j_commit_mutex); 11331da177e4SLinus Torvalds put_jl: 11341da177e4SLinus Torvalds put_journal_list(s, jl); 11351da177e4SLinus Torvalds 11361da177e4SLinus Torvalds if (retval) 1137bd4c625cSLinus Torvalds reiserfs_abort(s, retval, "Journal write error in %s", 1138fbe5498bSHarvey Harrison __func__); 11391da177e4SLinus Torvalds return retval; 11401da177e4SLinus Torvalds } 11411da177e4SLinus Torvalds 11421da177e4SLinus Torvalds /* 11431da177e4SLinus Torvalds ** flush_journal_list frequently needs to find a newer transaction for a given block. This does that, or 11441da177e4SLinus Torvalds ** returns NULL if it can't find anything 11451da177e4SLinus Torvalds */ 1146bd4c625cSLinus Torvalds static struct reiserfs_journal_list *find_newer_jl_for_cn(struct 1147bd4c625cSLinus Torvalds reiserfs_journal_cnode 1148bd4c625cSLinus Torvalds *cn) 1149bd4c625cSLinus Torvalds { 11501da177e4SLinus Torvalds struct super_block *sb = cn->sb; 11511da177e4SLinus Torvalds b_blocknr_t blocknr = cn->blocknr; 11521da177e4SLinus Torvalds 11531da177e4SLinus Torvalds cn = cn->hprev; 11541da177e4SLinus Torvalds while (cn) { 11551da177e4SLinus Torvalds if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist) { 11561da177e4SLinus Torvalds return cn->jlist; 11571da177e4SLinus Torvalds } 11581da177e4SLinus Torvalds cn = cn->hprev; 11591da177e4SLinus Torvalds } 11601da177e4SLinus Torvalds return NULL; 11611da177e4SLinus Torvalds } 11621da177e4SLinus Torvalds 1163a3172027SChris Mason static int newer_jl_done(struct reiserfs_journal_cnode *cn) 1164a3172027SChris Mason { 1165a3172027SChris Mason struct super_block *sb = cn->sb; 1166a3172027SChris Mason b_blocknr_t blocknr = cn->blocknr; 1167a3172027SChris Mason 1168a3172027SChris Mason cn = cn->hprev; 1169a3172027SChris Mason while (cn) { 1170a3172027SChris Mason if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist && 1171a3172027SChris Mason atomic_read(&cn->jlist->j_commit_left) != 0) 1172a3172027SChris Mason return 0; 1173a3172027SChris Mason cn = cn->hprev; 1174a3172027SChris Mason } 1175a3172027SChris Mason return 1; 1176a3172027SChris Mason } 1177a3172027SChris Mason 1178bd4c625cSLinus Torvalds static void remove_journal_hash(struct super_block *, 1179bd4c625cSLinus Torvalds struct reiserfs_journal_cnode **, 1180bd4c625cSLinus Torvalds struct reiserfs_journal_list *, unsigned long, 1181bd4c625cSLinus Torvalds int); 11821da177e4SLinus Torvalds 11831da177e4SLinus Torvalds /* 11841da177e4SLinus Torvalds ** once all the real blocks have been flushed, it is safe to remove them from the 11851da177e4SLinus Torvalds ** journal list for this transaction. Aside from freeing the cnode, this also allows the 11861da177e4SLinus Torvalds ** block to be reallocated for data blocks if it had been deleted. 11871da177e4SLinus Torvalds */ 1188a9dd3643SJeff Mahoney static void remove_all_from_journal_list(struct super_block *sb, 1189bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl, 1190bd4c625cSLinus Torvalds int debug) 1191bd4c625cSLinus Torvalds { 1192a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 11931da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn, *last; 11941da177e4SLinus Torvalds cn = jl->j_realblock; 11951da177e4SLinus Torvalds 11961da177e4SLinus Torvalds /* which is better, to lock once around the whole loop, or 11971da177e4SLinus Torvalds ** to lock for each call to remove_journal_hash? 11981da177e4SLinus Torvalds */ 11991da177e4SLinus Torvalds while (cn) { 12001da177e4SLinus Torvalds if (cn->blocknr != 0) { 12011da177e4SLinus Torvalds if (debug) { 1202a9dd3643SJeff Mahoney reiserfs_warning(sb, "reiserfs-2201", 1203bd4c625cSLinus Torvalds "block %u, bh is %d, state %ld", 1204bd4c625cSLinus Torvalds cn->blocknr, cn->bh ? 1 : 0, 1205bd4c625cSLinus Torvalds cn->state); 12061da177e4SLinus Torvalds } 12071da177e4SLinus Torvalds cn->state = 0; 1208a9dd3643SJeff Mahoney remove_journal_hash(sb, journal->j_list_hash_table, 1209bd4c625cSLinus Torvalds jl, cn->blocknr, 1); 12101da177e4SLinus Torvalds } 12111da177e4SLinus Torvalds last = cn; 12121da177e4SLinus Torvalds cn = cn->next; 1213a9dd3643SJeff Mahoney free_cnode(sb, last); 12141da177e4SLinus Torvalds } 12151da177e4SLinus Torvalds jl->j_realblock = NULL; 12161da177e4SLinus Torvalds } 12171da177e4SLinus Torvalds 12181da177e4SLinus Torvalds /* 12191da177e4SLinus Torvalds ** if this timestamp is greater than the timestamp we wrote last to the header block, write it to the header block. 12201da177e4SLinus Torvalds ** once this is done, I can safely say the log area for this transaction won't ever be replayed, and I can start 12211da177e4SLinus Torvalds ** releasing blocks in this transaction for reuse as data blocks. 12221da177e4SLinus Torvalds ** called by flush_journal_list, before it calls remove_all_from_journal_list 12231da177e4SLinus Torvalds ** 12241da177e4SLinus Torvalds */ 1225a9dd3643SJeff Mahoney static int _update_journal_header_block(struct super_block *sb, 1226bd4c625cSLinus Torvalds unsigned long offset, 1227600ed416SJeff Mahoney unsigned int trans_id) 1228bd4c625cSLinus Torvalds { 12291da177e4SLinus Torvalds struct reiserfs_journal_header *jh; 1230a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 12311da177e4SLinus Torvalds 12321da177e4SLinus Torvalds if (reiserfs_is_journal_aborted(journal)) 12331da177e4SLinus Torvalds return -EIO; 12341da177e4SLinus Torvalds 12351da177e4SLinus Torvalds if (trans_id >= journal->j_last_flush_trans_id) { 12361da177e4SLinus Torvalds if (buffer_locked((journal->j_header_bh))) { 12378ebc4232SFrederic Weisbecker reiserfs_write_unlock(sb); 12381da177e4SLinus Torvalds wait_on_buffer((journal->j_header_bh)); 12398ebc4232SFrederic Weisbecker reiserfs_write_lock(sb); 12401da177e4SLinus Torvalds if (unlikely(!buffer_uptodate(journal->j_header_bh))) { 12411da177e4SLinus Torvalds #ifdef CONFIG_REISERFS_CHECK 1242a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-699", 124345b03d5eSJeff Mahoney "buffer write failed"); 12441da177e4SLinus Torvalds #endif 12451da177e4SLinus Torvalds return -EIO; 12461da177e4SLinus Torvalds } 12471da177e4SLinus Torvalds } 12481da177e4SLinus Torvalds journal->j_last_flush_trans_id = trans_id; 12491da177e4SLinus Torvalds journal->j_first_unflushed_offset = offset; 1250bd4c625cSLinus Torvalds jh = (struct reiserfs_journal_header *)(journal->j_header_bh-> 1251bd4c625cSLinus Torvalds b_data); 12521da177e4SLinus Torvalds jh->j_last_flush_trans_id = cpu_to_le32(trans_id); 12531da177e4SLinus Torvalds jh->j_first_unflushed_offset = cpu_to_le32(offset); 12541da177e4SLinus Torvalds jh->j_mount_id = cpu_to_le32(journal->j_mount_id); 12551da177e4SLinus Torvalds 12561da177e4SLinus Torvalds set_buffer_dirty(journal->j_header_bh); 12578ebc4232SFrederic Weisbecker reiserfs_write_unlock(sb); 12587cd33ad2SChristoph Hellwig 12597cd33ad2SChristoph Hellwig if (reiserfs_barrier_flush(sb)) 12607cd33ad2SChristoph Hellwig __sync_dirty_buffer(journal->j_header_bh, WRITE_FLUSH_FUA); 12617cd33ad2SChristoph Hellwig else 12621da177e4SLinus Torvalds sync_dirty_buffer(journal->j_header_bh); 12637cd33ad2SChristoph Hellwig 12648ebc4232SFrederic Weisbecker reiserfs_write_lock(sb); 12651da177e4SLinus Torvalds if (!buffer_uptodate(journal->j_header_bh)) { 1266a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-837", 126745b03d5eSJeff Mahoney "IO error during journal replay"); 12681da177e4SLinus Torvalds return -EIO; 12691da177e4SLinus Torvalds } 12701da177e4SLinus Torvalds } 12711da177e4SLinus Torvalds return 0; 12721da177e4SLinus Torvalds } 12731da177e4SLinus Torvalds 1274a9dd3643SJeff Mahoney static int update_journal_header_block(struct super_block *sb, 12751da177e4SLinus Torvalds unsigned long offset, 1276600ed416SJeff Mahoney unsigned int trans_id) 1277bd4c625cSLinus Torvalds { 1278a9dd3643SJeff Mahoney return _update_journal_header_block(sb, offset, trans_id); 12791da177e4SLinus Torvalds } 1280bd4c625cSLinus Torvalds 12811da177e4SLinus Torvalds /* 12821da177e4SLinus Torvalds ** flush any and all journal lists older than you are 12831da177e4SLinus Torvalds ** can only be called from flush_journal_list 12841da177e4SLinus Torvalds */ 1285a9dd3643SJeff Mahoney static int flush_older_journal_lists(struct super_block *sb, 12861da177e4SLinus Torvalds struct reiserfs_journal_list *jl) 12871da177e4SLinus Torvalds { 12881da177e4SLinus Torvalds struct list_head *entry; 12891da177e4SLinus Torvalds struct reiserfs_journal_list *other_jl; 1290a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 1291600ed416SJeff Mahoney unsigned int trans_id = jl->j_trans_id; 12921da177e4SLinus Torvalds 12931da177e4SLinus Torvalds /* we know we are the only ones flushing things, no extra race 12941da177e4SLinus Torvalds * protection is required. 12951da177e4SLinus Torvalds */ 12961da177e4SLinus Torvalds restart: 12971da177e4SLinus Torvalds entry = journal->j_journal_list.next; 12981da177e4SLinus Torvalds /* Did we wrap? */ 12991da177e4SLinus Torvalds if (entry == &journal->j_journal_list) 13001da177e4SLinus Torvalds return 0; 13011da177e4SLinus Torvalds other_jl = JOURNAL_LIST_ENTRY(entry); 13021da177e4SLinus Torvalds if (other_jl->j_trans_id < trans_id) { 13031da177e4SLinus Torvalds BUG_ON(other_jl->j_refcount <= 0); 13041da177e4SLinus Torvalds /* do not flush all */ 1305a9dd3643SJeff Mahoney flush_journal_list(sb, other_jl, 0); 13061da177e4SLinus Torvalds 13071da177e4SLinus Torvalds /* other_jl is now deleted from the list */ 13081da177e4SLinus Torvalds goto restart; 13091da177e4SLinus Torvalds } 13101da177e4SLinus Torvalds return 0; 13111da177e4SLinus Torvalds } 13121da177e4SLinus Torvalds 13131da177e4SLinus Torvalds static void del_from_work_list(struct super_block *s, 1314bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl) 1315bd4c625cSLinus Torvalds { 13161da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 13171da177e4SLinus Torvalds if (!list_empty(&jl->j_working_list)) { 13181da177e4SLinus Torvalds list_del_init(&jl->j_working_list); 13191da177e4SLinus Torvalds journal->j_num_work_lists--; 13201da177e4SLinus Torvalds } 13211da177e4SLinus Torvalds } 13221da177e4SLinus Torvalds 13231da177e4SLinus Torvalds /* flush a journal list, both commit and real blocks 13241da177e4SLinus Torvalds ** 13251da177e4SLinus Torvalds ** always set flushall to 1, unless you are calling from inside 13261da177e4SLinus Torvalds ** flush_journal_list 13271da177e4SLinus Torvalds ** 13281da177e4SLinus Torvalds ** IMPORTANT. This can only be called while there are no journal writers, 13291da177e4SLinus Torvalds ** and the journal is locked. That means it can only be called from 13301da177e4SLinus Torvalds ** do_journal_end, or by journal_release 13311da177e4SLinus Torvalds */ 13321da177e4SLinus Torvalds static int flush_journal_list(struct super_block *s, 1333bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl, int flushall) 1334bd4c625cSLinus Torvalds { 13351da177e4SLinus Torvalds struct reiserfs_journal_list *pjl; 13361da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn, *last; 13371da177e4SLinus Torvalds int count; 13381da177e4SLinus Torvalds int was_jwait = 0; 13391da177e4SLinus Torvalds int was_dirty = 0; 13401da177e4SLinus Torvalds struct buffer_head *saved_bh; 13411da177e4SLinus Torvalds unsigned long j_len_saved = jl->j_len; 13421da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 13431da177e4SLinus Torvalds int err = 0; 13441da177e4SLinus Torvalds 13451da177e4SLinus Torvalds BUG_ON(j_len_saved <= 0); 13461da177e4SLinus Torvalds 13471da177e4SLinus Torvalds if (atomic_read(&journal->j_wcount) != 0) { 134845b03d5eSJeff Mahoney reiserfs_warning(s, "clm-2048", "called with wcount %d", 13491da177e4SLinus Torvalds atomic_read(&journal->j_wcount)); 13501da177e4SLinus Torvalds } 13511da177e4SLinus Torvalds BUG_ON(jl->j_trans_id == 0); 13521da177e4SLinus Torvalds 13531da177e4SLinus Torvalds /* if flushall == 0, the lock is already held */ 13541da177e4SLinus Torvalds if (flushall) { 13558ebc4232SFrederic Weisbecker reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s); 1356afe70259SJeff Mahoney } else if (mutex_trylock(&journal->j_flush_mutex)) { 13571da177e4SLinus Torvalds BUG(); 13581da177e4SLinus Torvalds } 13591da177e4SLinus Torvalds 13601da177e4SLinus Torvalds count = 0; 13611da177e4SLinus Torvalds if (j_len_saved > journal->j_trans_max) { 1362c3a9c210SJeff Mahoney reiserfs_panic(s, "journal-715", "length is %lu, trans id %lu", 1363bd4c625cSLinus Torvalds j_len_saved, jl->j_trans_id); 13641da177e4SLinus Torvalds return 0; 13651da177e4SLinus Torvalds } 13661da177e4SLinus Torvalds 13671da177e4SLinus Torvalds /* if all the work is already done, get out of here */ 13681da177e4SLinus Torvalds if (atomic_read(&(jl->j_nonzerolen)) <= 0 && 13691da177e4SLinus Torvalds atomic_read(&(jl->j_commit_left)) <= 0) { 13701da177e4SLinus Torvalds goto flush_older_and_return; 13711da177e4SLinus Torvalds } 13721da177e4SLinus Torvalds 13731da177e4SLinus Torvalds /* start by putting the commit list on disk. This will also flush 13741da177e4SLinus Torvalds ** the commit lists of any olders transactions 13751da177e4SLinus Torvalds */ 13761da177e4SLinus Torvalds flush_commit_list(s, jl, 1); 13771da177e4SLinus Torvalds 1378bd4c625cSLinus Torvalds if (!(jl->j_state & LIST_DIRTY) 1379bd4c625cSLinus Torvalds && !reiserfs_is_journal_aborted(journal)) 13801da177e4SLinus Torvalds BUG(); 13811da177e4SLinus Torvalds 13821da177e4SLinus Torvalds /* are we done now? */ 13831da177e4SLinus Torvalds if (atomic_read(&(jl->j_nonzerolen)) <= 0 && 13841da177e4SLinus Torvalds atomic_read(&(jl->j_commit_left)) <= 0) { 13851da177e4SLinus Torvalds goto flush_older_and_return; 13861da177e4SLinus Torvalds } 13871da177e4SLinus Torvalds 13881da177e4SLinus Torvalds /* loop through each cnode, see if we need to write it, 13891da177e4SLinus Torvalds ** or wait on a more recent transaction, or just ignore it 13901da177e4SLinus Torvalds */ 13911da177e4SLinus Torvalds if (atomic_read(&(journal->j_wcount)) != 0) { 1392c3a9c210SJeff Mahoney reiserfs_panic(s, "journal-844", "journal list is flushing, " 1393c3a9c210SJeff Mahoney "wcount is not 0"); 13941da177e4SLinus Torvalds } 13951da177e4SLinus Torvalds cn = jl->j_realblock; 13961da177e4SLinus Torvalds while (cn) { 13971da177e4SLinus Torvalds was_jwait = 0; 13981da177e4SLinus Torvalds was_dirty = 0; 13991da177e4SLinus Torvalds saved_bh = NULL; 14001da177e4SLinus Torvalds /* blocknr of 0 is no longer in the hash, ignore it */ 14011da177e4SLinus Torvalds if (cn->blocknr == 0) { 14021da177e4SLinus Torvalds goto free_cnode; 14031da177e4SLinus Torvalds } 14041da177e4SLinus Torvalds 14051da177e4SLinus Torvalds /* This transaction failed commit. Don't write out to the disk */ 14061da177e4SLinus Torvalds if (!(jl->j_state & LIST_DIRTY)) 14071da177e4SLinus Torvalds goto free_cnode; 14081da177e4SLinus Torvalds 14091da177e4SLinus Torvalds pjl = find_newer_jl_for_cn(cn); 14101da177e4SLinus Torvalds /* the order is important here. We check pjl to make sure we 14111da177e4SLinus Torvalds ** don't clear BH_JDirty_wait if we aren't the one writing this 14121da177e4SLinus Torvalds ** block to disk 14131da177e4SLinus Torvalds */ 14141da177e4SLinus Torvalds if (!pjl && cn->bh) { 14151da177e4SLinus Torvalds saved_bh = cn->bh; 14161da177e4SLinus Torvalds 14171da177e4SLinus Torvalds /* we do this to make sure nobody releases the buffer while 14181da177e4SLinus Torvalds ** we are working with it 14191da177e4SLinus Torvalds */ 14201da177e4SLinus Torvalds get_bh(saved_bh); 14211da177e4SLinus Torvalds 14221da177e4SLinus Torvalds if (buffer_journal_dirty(saved_bh)) { 14231da177e4SLinus Torvalds BUG_ON(!can_dirty(cn)); 14241da177e4SLinus Torvalds was_jwait = 1; 14251da177e4SLinus Torvalds was_dirty = 1; 14261da177e4SLinus Torvalds } else if (can_dirty(cn)) { 14271da177e4SLinus Torvalds /* everything with !pjl && jwait should be writable */ 14281da177e4SLinus Torvalds BUG(); 14291da177e4SLinus Torvalds } 14301da177e4SLinus Torvalds } 14311da177e4SLinus Torvalds 14321da177e4SLinus Torvalds /* if someone has this block in a newer transaction, just make 14330779bf2dSMatt LaPlante ** sure they are committed, and don't try writing it to disk 14341da177e4SLinus Torvalds */ 14351da177e4SLinus Torvalds if (pjl) { 14361da177e4SLinus Torvalds if (atomic_read(&pjl->j_commit_left)) 14371da177e4SLinus Torvalds flush_commit_list(s, pjl, 1); 14381da177e4SLinus Torvalds goto free_cnode; 14391da177e4SLinus Torvalds } 14401da177e4SLinus Torvalds 14411da177e4SLinus Torvalds /* bh == NULL when the block got to disk on its own, OR, 14421da177e4SLinus Torvalds ** the block got freed in a future transaction 14431da177e4SLinus Torvalds */ 14441da177e4SLinus Torvalds if (saved_bh == NULL) { 14451da177e4SLinus Torvalds goto free_cnode; 14461da177e4SLinus Torvalds } 14471da177e4SLinus Torvalds 14481da177e4SLinus Torvalds /* this should never happen. kupdate_one_transaction has this list 14491da177e4SLinus Torvalds ** locked while it works, so we should never see a buffer here that 14501da177e4SLinus Torvalds ** is not marked JDirty_wait 14511da177e4SLinus Torvalds */ 14521da177e4SLinus Torvalds if ((!was_jwait) && !buffer_locked(saved_bh)) { 145345b03d5eSJeff Mahoney reiserfs_warning(s, "journal-813", 145445b03d5eSJeff Mahoney "BAD! buffer %llu %cdirty %cjwait, " 14551da177e4SLinus Torvalds "not in a newer tranasction", 1456bd4c625cSLinus Torvalds (unsigned long long)saved_bh-> 1457bd4c625cSLinus Torvalds b_blocknr, was_dirty ? ' ' : '!', 1458bd4c625cSLinus Torvalds was_jwait ? ' ' : '!'); 14591da177e4SLinus Torvalds } 14601da177e4SLinus Torvalds if (was_dirty) { 14611da177e4SLinus Torvalds /* we inc again because saved_bh gets decremented at free_cnode */ 14621da177e4SLinus Torvalds get_bh(saved_bh); 14631da177e4SLinus Torvalds set_bit(BLOCK_NEEDS_FLUSH, &cn->state); 14641da177e4SLinus Torvalds lock_buffer(saved_bh); 14651da177e4SLinus Torvalds BUG_ON(cn->blocknr != saved_bh->b_blocknr); 14661da177e4SLinus Torvalds if (buffer_dirty(saved_bh)) 14671da177e4SLinus Torvalds submit_logged_buffer(saved_bh); 14681da177e4SLinus Torvalds else 14691da177e4SLinus Torvalds unlock_buffer(saved_bh); 14701da177e4SLinus Torvalds count++; 14711da177e4SLinus Torvalds } else { 147245b03d5eSJeff Mahoney reiserfs_warning(s, "clm-2082", 147345b03d5eSJeff Mahoney "Unable to flush buffer %llu in %s", 1474bd4c625cSLinus Torvalds (unsigned long long)saved_bh-> 1475fbe5498bSHarvey Harrison b_blocknr, __func__); 14761da177e4SLinus Torvalds } 14771da177e4SLinus Torvalds free_cnode: 14781da177e4SLinus Torvalds last = cn; 14791da177e4SLinus Torvalds cn = cn->next; 14801da177e4SLinus Torvalds if (saved_bh) { 14811da177e4SLinus Torvalds /* we incremented this to keep others from taking the buffer head away */ 14821da177e4SLinus Torvalds put_bh(saved_bh); 14831da177e4SLinus Torvalds if (atomic_read(&(saved_bh->b_count)) < 0) { 148445b03d5eSJeff Mahoney reiserfs_warning(s, "journal-945", 148545b03d5eSJeff Mahoney "saved_bh->b_count < 0"); 14861da177e4SLinus Torvalds } 14871da177e4SLinus Torvalds } 14881da177e4SLinus Torvalds } 14891da177e4SLinus Torvalds if (count > 0) { 14901da177e4SLinus Torvalds cn = jl->j_realblock; 14911da177e4SLinus Torvalds while (cn) { 14921da177e4SLinus Torvalds if (test_bit(BLOCK_NEEDS_FLUSH, &cn->state)) { 14931da177e4SLinus Torvalds if (!cn->bh) { 1494c3a9c210SJeff Mahoney reiserfs_panic(s, "journal-1011", 1495c3a9c210SJeff Mahoney "cn->bh is NULL"); 14961da177e4SLinus Torvalds } 14978ebc4232SFrederic Weisbecker 14988ebc4232SFrederic Weisbecker reiserfs_write_unlock(s); 14991da177e4SLinus Torvalds wait_on_buffer(cn->bh); 15008ebc4232SFrederic Weisbecker reiserfs_write_lock(s); 15018ebc4232SFrederic Weisbecker 15021da177e4SLinus Torvalds if (!cn->bh) { 1503c3a9c210SJeff Mahoney reiserfs_panic(s, "journal-1012", 1504c3a9c210SJeff Mahoney "cn->bh is NULL"); 15051da177e4SLinus Torvalds } 15061da177e4SLinus Torvalds if (unlikely(!buffer_uptodate(cn->bh))) { 15071da177e4SLinus Torvalds #ifdef CONFIG_REISERFS_CHECK 150845b03d5eSJeff Mahoney reiserfs_warning(s, "journal-949", 150945b03d5eSJeff Mahoney "buffer write failed"); 15101da177e4SLinus Torvalds #endif 15111da177e4SLinus Torvalds err = -EIO; 15121da177e4SLinus Torvalds } 15131da177e4SLinus Torvalds /* note, we must clear the JDirty_wait bit after the up to date 15141da177e4SLinus Torvalds ** check, otherwise we race against our flushpage routine 15151da177e4SLinus Torvalds */ 1516bd4c625cSLinus Torvalds BUG_ON(!test_clear_buffer_journal_dirty 1517bd4c625cSLinus Torvalds (cn->bh)); 15181da177e4SLinus Torvalds 1519398c95bdSChris Mason /* drop one ref for us */ 15201da177e4SLinus Torvalds put_bh(cn->bh); 1521398c95bdSChris Mason /* drop one ref for journal_mark_dirty */ 1522398c95bdSChris Mason release_buffer_page(cn->bh); 15231da177e4SLinus Torvalds } 15241da177e4SLinus Torvalds cn = cn->next; 15251da177e4SLinus Torvalds } 15261da177e4SLinus Torvalds } 15271da177e4SLinus Torvalds 15281da177e4SLinus Torvalds if (err) 1529bd4c625cSLinus Torvalds reiserfs_abort(s, -EIO, 1530bd4c625cSLinus Torvalds "Write error while pushing transaction to disk in %s", 1531fbe5498bSHarvey Harrison __func__); 15321da177e4SLinus Torvalds flush_older_and_return: 15331da177e4SLinus Torvalds 15341da177e4SLinus Torvalds /* before we can update the journal header block, we _must_ flush all 15351da177e4SLinus Torvalds ** real blocks from all older transactions to disk. This is because 15361da177e4SLinus Torvalds ** once the header block is updated, this transaction will not be 15371da177e4SLinus Torvalds ** replayed after a crash 15381da177e4SLinus Torvalds */ 15391da177e4SLinus Torvalds if (flushall) { 15401da177e4SLinus Torvalds flush_older_journal_lists(s, jl); 15411da177e4SLinus Torvalds } 15421da177e4SLinus Torvalds 15431da177e4SLinus Torvalds err = journal->j_errno; 15441da177e4SLinus Torvalds /* before we can remove everything from the hash tables for this 15451da177e4SLinus Torvalds ** transaction, we must make sure it can never be replayed 15461da177e4SLinus Torvalds ** 15471da177e4SLinus Torvalds ** since we are only called from do_journal_end, we know for sure there 15481da177e4SLinus Torvalds ** are no allocations going on while we are flushing journal lists. So, 15491da177e4SLinus Torvalds ** we only need to update the journal header block for the last list 15501da177e4SLinus Torvalds ** being flushed 15511da177e4SLinus Torvalds */ 15521da177e4SLinus Torvalds if (!err && flushall) { 1553bd4c625cSLinus Torvalds err = 1554bd4c625cSLinus Torvalds update_journal_header_block(s, 1555bd4c625cSLinus Torvalds (jl->j_start + jl->j_len + 1556bd4c625cSLinus Torvalds 2) % SB_ONDISK_JOURNAL_SIZE(s), 1557bd4c625cSLinus Torvalds jl->j_trans_id); 15581da177e4SLinus Torvalds if (err) 1559bd4c625cSLinus Torvalds reiserfs_abort(s, -EIO, 1560bd4c625cSLinus Torvalds "Write error while updating journal header in %s", 1561fbe5498bSHarvey Harrison __func__); 15621da177e4SLinus Torvalds } 15631da177e4SLinus Torvalds remove_all_from_journal_list(s, jl, 0); 15641da177e4SLinus Torvalds list_del_init(&jl->j_list); 15651da177e4SLinus Torvalds journal->j_num_lists--; 15661da177e4SLinus Torvalds del_from_work_list(s, jl); 15671da177e4SLinus Torvalds 15681da177e4SLinus Torvalds if (journal->j_last_flush_id != 0 && 15691da177e4SLinus Torvalds (jl->j_trans_id - journal->j_last_flush_id) != 1) { 157045b03d5eSJeff Mahoney reiserfs_warning(s, "clm-2201", "last flush %lu, current %lu", 1571bd4c625cSLinus Torvalds journal->j_last_flush_id, jl->j_trans_id); 15721da177e4SLinus Torvalds } 15731da177e4SLinus Torvalds journal->j_last_flush_id = jl->j_trans_id; 15741da177e4SLinus Torvalds 15751da177e4SLinus Torvalds /* not strictly required since we are freeing the list, but it should 15761da177e4SLinus Torvalds * help find code using dead lists later on 15771da177e4SLinus Torvalds */ 15781da177e4SLinus Torvalds jl->j_len = 0; 15791da177e4SLinus Torvalds atomic_set(&(jl->j_nonzerolen), 0); 15801da177e4SLinus Torvalds jl->j_start = 0; 15811da177e4SLinus Torvalds jl->j_realblock = NULL; 15821da177e4SLinus Torvalds jl->j_commit_bh = NULL; 15831da177e4SLinus Torvalds jl->j_trans_id = 0; 15841da177e4SLinus Torvalds jl->j_state = 0; 15851da177e4SLinus Torvalds put_journal_list(s, jl); 15861da177e4SLinus Torvalds if (flushall) 1587afe70259SJeff Mahoney mutex_unlock(&journal->j_flush_mutex); 15881da177e4SLinus Torvalds return err; 15891da177e4SLinus Torvalds } 15901da177e4SLinus Torvalds 1591a3172027SChris Mason static int test_transaction(struct super_block *s, 1592a3172027SChris Mason struct reiserfs_journal_list *jl) 1593a3172027SChris Mason { 1594a3172027SChris Mason struct reiserfs_journal_cnode *cn; 1595a3172027SChris Mason 1596a3172027SChris Mason if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) 1597a3172027SChris Mason return 1; 1598a3172027SChris Mason 1599a3172027SChris Mason cn = jl->j_realblock; 1600a3172027SChris Mason while (cn) { 1601a3172027SChris Mason /* if the blocknr == 0, this has been cleared from the hash, 1602a3172027SChris Mason ** skip it 1603a3172027SChris Mason */ 1604a3172027SChris Mason if (cn->blocknr == 0) { 1605a3172027SChris Mason goto next; 1606a3172027SChris Mason } 1607a3172027SChris Mason if (cn->bh && !newer_jl_done(cn)) 1608a3172027SChris Mason return 0; 1609a3172027SChris Mason next: 1610a3172027SChris Mason cn = cn->next; 1611a3172027SChris Mason cond_resched(); 1612a3172027SChris Mason } 1613a3172027SChris Mason return 0; 1614a3172027SChris Mason } 1615a3172027SChris Mason 16161da177e4SLinus Torvalds static int write_one_transaction(struct super_block *s, 16171da177e4SLinus Torvalds struct reiserfs_journal_list *jl, 16181da177e4SLinus Torvalds struct buffer_chunk *chunk) 16191da177e4SLinus Torvalds { 16201da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 16211da177e4SLinus Torvalds int ret = 0; 16221da177e4SLinus Torvalds 16231da177e4SLinus Torvalds jl->j_state |= LIST_TOUCHED; 16241da177e4SLinus Torvalds del_from_work_list(s, jl); 16251da177e4SLinus Torvalds if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) { 16261da177e4SLinus Torvalds return 0; 16271da177e4SLinus Torvalds } 16281da177e4SLinus Torvalds 16291da177e4SLinus Torvalds cn = jl->j_realblock; 16301da177e4SLinus Torvalds while (cn) { 16311da177e4SLinus Torvalds /* if the blocknr == 0, this has been cleared from the hash, 16321da177e4SLinus Torvalds ** skip it 16331da177e4SLinus Torvalds */ 16341da177e4SLinus Torvalds if (cn->blocknr == 0) { 16351da177e4SLinus Torvalds goto next; 16361da177e4SLinus Torvalds } 16371da177e4SLinus Torvalds if (cn->bh && can_dirty(cn) && buffer_dirty(cn->bh)) { 16381da177e4SLinus Torvalds struct buffer_head *tmp_bh; 16391da177e4SLinus Torvalds /* we can race against journal_mark_freed when we try 16401da177e4SLinus Torvalds * to lock_buffer(cn->bh), so we have to inc the buffer 16411da177e4SLinus Torvalds * count, and recheck things after locking 16421da177e4SLinus Torvalds */ 16431da177e4SLinus Torvalds tmp_bh = cn->bh; 16441da177e4SLinus Torvalds get_bh(tmp_bh); 16451da177e4SLinus Torvalds lock_buffer(tmp_bh); 16461da177e4SLinus Torvalds if (cn->bh && can_dirty(cn) && buffer_dirty(tmp_bh)) { 16471da177e4SLinus Torvalds if (!buffer_journal_dirty(tmp_bh) || 16481da177e4SLinus Torvalds buffer_journal_prepared(tmp_bh)) 16491da177e4SLinus Torvalds BUG(); 16501da177e4SLinus Torvalds add_to_chunk(chunk, tmp_bh, NULL, write_chunk); 16511da177e4SLinus Torvalds ret++; 16521da177e4SLinus Torvalds } else { 16531da177e4SLinus Torvalds /* note, cn->bh might be null now */ 16541da177e4SLinus Torvalds unlock_buffer(tmp_bh); 16551da177e4SLinus Torvalds } 16561da177e4SLinus Torvalds put_bh(tmp_bh); 16571da177e4SLinus Torvalds } 16581da177e4SLinus Torvalds next: 16591da177e4SLinus Torvalds cn = cn->next; 16601da177e4SLinus Torvalds cond_resched(); 16611da177e4SLinus Torvalds } 16621da177e4SLinus Torvalds return ret; 16631da177e4SLinus Torvalds } 16641da177e4SLinus Torvalds 16651da177e4SLinus Torvalds /* used by flush_commit_list */ 16661da177e4SLinus Torvalds static int dirty_one_transaction(struct super_block *s, 16671da177e4SLinus Torvalds struct reiserfs_journal_list *jl) 16681da177e4SLinus Torvalds { 16691da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 16701da177e4SLinus Torvalds struct reiserfs_journal_list *pjl; 16711da177e4SLinus Torvalds int ret = 0; 16721da177e4SLinus Torvalds 16731da177e4SLinus Torvalds jl->j_state |= LIST_DIRTY; 16741da177e4SLinus Torvalds cn = jl->j_realblock; 16751da177e4SLinus Torvalds while (cn) { 16761da177e4SLinus Torvalds /* look for a more recent transaction that logged this 16771da177e4SLinus Torvalds ** buffer. Only the most recent transaction with a buffer in 16781da177e4SLinus Torvalds ** it is allowed to send that buffer to disk 16791da177e4SLinus Torvalds */ 16801da177e4SLinus Torvalds pjl = find_newer_jl_for_cn(cn); 1681bd4c625cSLinus Torvalds if (!pjl && cn->blocknr && cn->bh 1682bd4c625cSLinus Torvalds && buffer_journal_dirty(cn->bh)) { 16831da177e4SLinus Torvalds BUG_ON(!can_dirty(cn)); 16841da177e4SLinus Torvalds /* if the buffer is prepared, it will either be logged 16851da177e4SLinus Torvalds * or restored. If restored, we need to make sure 16861da177e4SLinus Torvalds * it actually gets marked dirty 16871da177e4SLinus Torvalds */ 16881da177e4SLinus Torvalds clear_buffer_journal_new(cn->bh); 16891da177e4SLinus Torvalds if (buffer_journal_prepared(cn->bh)) { 16901da177e4SLinus Torvalds set_buffer_journal_restore_dirty(cn->bh); 16911da177e4SLinus Torvalds } else { 16921da177e4SLinus Torvalds set_buffer_journal_test(cn->bh); 16931da177e4SLinus Torvalds mark_buffer_dirty(cn->bh); 16941da177e4SLinus Torvalds } 16951da177e4SLinus Torvalds } 16961da177e4SLinus Torvalds cn = cn->next; 16971da177e4SLinus Torvalds } 16981da177e4SLinus Torvalds return ret; 16991da177e4SLinus Torvalds } 17001da177e4SLinus Torvalds 17011da177e4SLinus Torvalds static int kupdate_transactions(struct super_block *s, 17021da177e4SLinus Torvalds struct reiserfs_journal_list *jl, 17031da177e4SLinus Torvalds struct reiserfs_journal_list **next_jl, 1704600ed416SJeff Mahoney unsigned int *next_trans_id, 1705bd4c625cSLinus Torvalds int num_blocks, int num_trans) 1706bd4c625cSLinus Torvalds { 17071da177e4SLinus Torvalds int ret = 0; 17081da177e4SLinus Torvalds int written = 0; 17091da177e4SLinus Torvalds int transactions_flushed = 0; 1710600ed416SJeff Mahoney unsigned int orig_trans_id = jl->j_trans_id; 17111da177e4SLinus Torvalds struct buffer_chunk chunk; 17121da177e4SLinus Torvalds struct list_head *entry; 17131da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 17141da177e4SLinus Torvalds chunk.nr = 0; 17151da177e4SLinus Torvalds 1716a412f9efSFrederic Weisbecker reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s); 17171da177e4SLinus Torvalds if (!journal_list_still_alive(s, orig_trans_id)) { 17181da177e4SLinus Torvalds goto done; 17191da177e4SLinus Torvalds } 17201da177e4SLinus Torvalds 1721afe70259SJeff Mahoney /* we've got j_flush_mutex held, nobody is going to delete any 17221da177e4SLinus Torvalds * of these lists out from underneath us 17231da177e4SLinus Torvalds */ 17241da177e4SLinus Torvalds while ((num_trans && transactions_flushed < num_trans) || 17251da177e4SLinus Torvalds (!num_trans && written < num_blocks)) { 17261da177e4SLinus Torvalds 17271da177e4SLinus Torvalds if (jl->j_len == 0 || (jl->j_state & LIST_TOUCHED) || 1728bd4c625cSLinus Torvalds atomic_read(&jl->j_commit_left) 1729bd4c625cSLinus Torvalds || !(jl->j_state & LIST_DIRTY)) { 17301da177e4SLinus Torvalds del_from_work_list(s, jl); 17311da177e4SLinus Torvalds break; 17321da177e4SLinus Torvalds } 17331da177e4SLinus Torvalds ret = write_one_transaction(s, jl, &chunk); 17341da177e4SLinus Torvalds 17351da177e4SLinus Torvalds if (ret < 0) 17361da177e4SLinus Torvalds goto done; 17371da177e4SLinus Torvalds transactions_flushed++; 17381da177e4SLinus Torvalds written += ret; 17391da177e4SLinus Torvalds entry = jl->j_list.next; 17401da177e4SLinus Torvalds 17411da177e4SLinus Torvalds /* did we wrap? */ 17421da177e4SLinus Torvalds if (entry == &journal->j_journal_list) { 17431da177e4SLinus Torvalds break; 17441da177e4SLinus Torvalds } 17451da177e4SLinus Torvalds jl = JOURNAL_LIST_ENTRY(entry); 17461da177e4SLinus Torvalds 17471da177e4SLinus Torvalds /* don't bother with older transactions */ 17481da177e4SLinus Torvalds if (jl->j_trans_id <= orig_trans_id) 17491da177e4SLinus Torvalds break; 17501da177e4SLinus Torvalds } 17511da177e4SLinus Torvalds if (chunk.nr) { 17521da177e4SLinus Torvalds write_chunk(&chunk); 17531da177e4SLinus Torvalds } 17541da177e4SLinus Torvalds 17551da177e4SLinus Torvalds done: 1756afe70259SJeff Mahoney mutex_unlock(&journal->j_flush_mutex); 17571da177e4SLinus Torvalds return ret; 17581da177e4SLinus Torvalds } 17591da177e4SLinus Torvalds 17601da177e4SLinus Torvalds /* for o_sync and fsync heavy applications, they tend to use 17611da177e4SLinus Torvalds ** all the journa list slots with tiny transactions. These 17621da177e4SLinus Torvalds ** trigger lots and lots of calls to update the header block, which 17631da177e4SLinus Torvalds ** adds seeks and slows things down. 17641da177e4SLinus Torvalds ** 17651da177e4SLinus Torvalds ** This function tries to clear out a large chunk of the journal lists 17661da177e4SLinus Torvalds ** at once, which makes everything faster since only the newest journal 17671da177e4SLinus Torvalds ** list updates the header block 17681da177e4SLinus Torvalds */ 17691da177e4SLinus Torvalds static int flush_used_journal_lists(struct super_block *s, 1770bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl) 1771bd4c625cSLinus Torvalds { 17721da177e4SLinus Torvalds unsigned long len = 0; 17731da177e4SLinus Torvalds unsigned long cur_len; 17741da177e4SLinus Torvalds int ret; 17751da177e4SLinus Torvalds int i; 17761da177e4SLinus Torvalds int limit = 256; 17771da177e4SLinus Torvalds struct reiserfs_journal_list *tjl; 17781da177e4SLinus Torvalds struct reiserfs_journal_list *flush_jl; 1779600ed416SJeff Mahoney unsigned int trans_id; 17801da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 17811da177e4SLinus Torvalds 17821da177e4SLinus Torvalds flush_jl = tjl = jl; 17831da177e4SLinus Torvalds 17841da177e4SLinus Torvalds /* in data logging mode, try harder to flush a lot of blocks */ 17851da177e4SLinus Torvalds if (reiserfs_data_log(s)) 17861da177e4SLinus Torvalds limit = 1024; 17871da177e4SLinus Torvalds /* flush for 256 transactions or limit blocks, whichever comes first */ 17881da177e4SLinus Torvalds for (i = 0; i < 256 && len < limit; i++) { 17891da177e4SLinus Torvalds if (atomic_read(&tjl->j_commit_left) || 17901da177e4SLinus Torvalds tjl->j_trans_id < jl->j_trans_id) { 17911da177e4SLinus Torvalds break; 17921da177e4SLinus Torvalds } 17931da177e4SLinus Torvalds cur_len = atomic_read(&tjl->j_nonzerolen); 17941da177e4SLinus Torvalds if (cur_len > 0) { 17951da177e4SLinus Torvalds tjl->j_state &= ~LIST_TOUCHED; 17961da177e4SLinus Torvalds } 17971da177e4SLinus Torvalds len += cur_len; 17981da177e4SLinus Torvalds flush_jl = tjl; 17991da177e4SLinus Torvalds if (tjl->j_list.next == &journal->j_journal_list) 18001da177e4SLinus Torvalds break; 18011da177e4SLinus Torvalds tjl = JOURNAL_LIST_ENTRY(tjl->j_list.next); 18021da177e4SLinus Torvalds } 18031da177e4SLinus Torvalds /* try to find a group of blocks we can flush across all the 18041da177e4SLinus Torvalds ** transactions, but only bother if we've actually spanned 18051da177e4SLinus Torvalds ** across multiple lists 18061da177e4SLinus Torvalds */ 18071da177e4SLinus Torvalds if (flush_jl != jl) { 18081da177e4SLinus Torvalds ret = kupdate_transactions(s, jl, &tjl, &trans_id, len, i); 18091da177e4SLinus Torvalds } 18101da177e4SLinus Torvalds flush_journal_list(s, flush_jl, 1); 18111da177e4SLinus Torvalds return 0; 18121da177e4SLinus Torvalds } 18131da177e4SLinus Torvalds 18141da177e4SLinus Torvalds /* 18151da177e4SLinus Torvalds ** removes any nodes in table with name block and dev as bh. 18161da177e4SLinus Torvalds ** only touchs the hnext and hprev pointers. 18171da177e4SLinus Torvalds */ 18181da177e4SLinus Torvalds void remove_journal_hash(struct super_block *sb, 18191da177e4SLinus Torvalds struct reiserfs_journal_cnode **table, 18201da177e4SLinus Torvalds struct reiserfs_journal_list *jl, 18211da177e4SLinus Torvalds unsigned long block, int remove_freed) 18221da177e4SLinus Torvalds { 18231da177e4SLinus Torvalds struct reiserfs_journal_cnode *cur; 18241da177e4SLinus Torvalds struct reiserfs_journal_cnode **head; 18251da177e4SLinus Torvalds 18261da177e4SLinus Torvalds head = &(journal_hash(table, sb, block)); 18271da177e4SLinus Torvalds if (!head) { 18281da177e4SLinus Torvalds return; 18291da177e4SLinus Torvalds } 18301da177e4SLinus Torvalds cur = *head; 18311da177e4SLinus Torvalds while (cur) { 1832bd4c625cSLinus Torvalds if (cur->blocknr == block && cur->sb == sb 1833bd4c625cSLinus Torvalds && (jl == NULL || jl == cur->jlist) 1834bd4c625cSLinus Torvalds && (!test_bit(BLOCK_FREED, &cur->state) || remove_freed)) { 18351da177e4SLinus Torvalds if (cur->hnext) { 18361da177e4SLinus Torvalds cur->hnext->hprev = cur->hprev; 18371da177e4SLinus Torvalds } 18381da177e4SLinus Torvalds if (cur->hprev) { 18391da177e4SLinus Torvalds cur->hprev->hnext = cur->hnext; 18401da177e4SLinus Torvalds } else { 18411da177e4SLinus Torvalds *head = cur->hnext; 18421da177e4SLinus Torvalds } 18431da177e4SLinus Torvalds cur->blocknr = 0; 18441da177e4SLinus Torvalds cur->sb = NULL; 18451da177e4SLinus Torvalds cur->state = 0; 18461da177e4SLinus Torvalds if (cur->bh && cur->jlist) /* anybody who clears the cur->bh will also dec the nonzerolen */ 18471da177e4SLinus Torvalds atomic_dec(&(cur->jlist->j_nonzerolen)); 18481da177e4SLinus Torvalds cur->bh = NULL; 18491da177e4SLinus Torvalds cur->jlist = NULL; 18501da177e4SLinus Torvalds } 18511da177e4SLinus Torvalds cur = cur->hnext; 18521da177e4SLinus Torvalds } 18531da177e4SLinus Torvalds } 18541da177e4SLinus Torvalds 1855a9dd3643SJeff Mahoney static void free_journal_ram(struct super_block *sb) 1856bd4c625cSLinus Torvalds { 1857a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 1858d739b42bSPekka Enberg kfree(journal->j_current_jl); 18591da177e4SLinus Torvalds journal->j_num_lists--; 18601da177e4SLinus Torvalds 18611da177e4SLinus Torvalds vfree(journal->j_cnode_free_orig); 1862a9dd3643SJeff Mahoney free_list_bitmaps(sb, journal->j_list_bitmap); 1863a9dd3643SJeff Mahoney free_bitmap_nodes(sb); /* must be after free_list_bitmaps */ 18641da177e4SLinus Torvalds if (journal->j_header_bh) { 18651da177e4SLinus Torvalds brelse(journal->j_header_bh); 18661da177e4SLinus Torvalds } 18671da177e4SLinus Torvalds /* j_header_bh is on the journal dev, make sure not to release the journal 18681da177e4SLinus Torvalds * dev until we brelse j_header_bh 18691da177e4SLinus Torvalds */ 1870a9dd3643SJeff Mahoney release_journal_dev(sb, journal); 18711da177e4SLinus Torvalds vfree(journal); 18721da177e4SLinus Torvalds } 18731da177e4SLinus Torvalds 18741da177e4SLinus Torvalds /* 18751da177e4SLinus Torvalds ** call on unmount. Only set error to 1 if you haven't made your way out 18761da177e4SLinus Torvalds ** of read_super() yet. Any other caller must keep error at 0. 18771da177e4SLinus Torvalds */ 1878bd4c625cSLinus Torvalds static int do_journal_release(struct reiserfs_transaction_handle *th, 1879a9dd3643SJeff Mahoney struct super_block *sb, int error) 1880bd4c625cSLinus Torvalds { 18811da177e4SLinus Torvalds struct reiserfs_transaction_handle myth; 18821da177e4SLinus Torvalds int flushed = 0; 1883a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 18841da177e4SLinus Torvalds 18851da177e4SLinus Torvalds /* we only want to flush out transactions if we were called with error == 0 18861da177e4SLinus Torvalds */ 1887a9dd3643SJeff Mahoney if (!error && !(sb->s_flags & MS_RDONLY)) { 18881da177e4SLinus Torvalds /* end the current trans */ 18891da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 1890a9dd3643SJeff Mahoney do_journal_end(th, sb, 10, FLUSH_ALL); 18911da177e4SLinus Torvalds 18921da177e4SLinus Torvalds /* make sure something gets logged to force our way into the flush code */ 1893a9dd3643SJeff Mahoney if (!journal_join(&myth, sb, 1)) { 1894a9dd3643SJeff Mahoney reiserfs_prepare_for_journal(sb, 1895a9dd3643SJeff Mahoney SB_BUFFER_WITH_SB(sb), 1896bd4c625cSLinus Torvalds 1); 1897a9dd3643SJeff Mahoney journal_mark_dirty(&myth, sb, 1898a9dd3643SJeff Mahoney SB_BUFFER_WITH_SB(sb)); 1899a9dd3643SJeff Mahoney do_journal_end(&myth, sb, 1, FLUSH_ALL); 19001da177e4SLinus Torvalds flushed = 1; 19011da177e4SLinus Torvalds } 19021da177e4SLinus Torvalds } 19031da177e4SLinus Torvalds 19041da177e4SLinus Torvalds /* this also catches errors during the do_journal_end above */ 19051da177e4SLinus Torvalds if (!error && reiserfs_is_journal_aborted(journal)) { 19061da177e4SLinus Torvalds memset(&myth, 0, sizeof(myth)); 1907a9dd3643SJeff Mahoney if (!journal_join_abort(&myth, sb, 1)) { 1908a9dd3643SJeff Mahoney reiserfs_prepare_for_journal(sb, 1909a9dd3643SJeff Mahoney SB_BUFFER_WITH_SB(sb), 1910bd4c625cSLinus Torvalds 1); 1911a9dd3643SJeff Mahoney journal_mark_dirty(&myth, sb, 1912a9dd3643SJeff Mahoney SB_BUFFER_WITH_SB(sb)); 1913a9dd3643SJeff Mahoney do_journal_end(&myth, sb, 1, FLUSH_ALL); 19141da177e4SLinus Torvalds } 19151da177e4SLinus Torvalds } 19161da177e4SLinus Torvalds 19171da177e4SLinus Torvalds reiserfs_mounted_fs_count--; 19181da177e4SLinus Torvalds /* wait for all commits to finish */ 1919a9dd3643SJeff Mahoney cancel_delayed_work(&SB_JOURNAL(sb)->j_work); 19208ebc4232SFrederic Weisbecker 19218ebc4232SFrederic Weisbecker /* 19228ebc4232SFrederic Weisbecker * We must release the write lock here because 19238ebc4232SFrederic Weisbecker * the workqueue job (flush_async_commit) needs this lock 19248ebc4232SFrederic Weisbecker */ 19258ebc4232SFrederic Weisbecker reiserfs_write_unlock(sb); 19261da177e4SLinus Torvalds flush_workqueue(commit_wq); 19278ebc4232SFrederic Weisbecker 19281da177e4SLinus Torvalds if (!reiserfs_mounted_fs_count) { 19291da177e4SLinus Torvalds destroy_workqueue(commit_wq); 19301da177e4SLinus Torvalds commit_wq = NULL; 19311da177e4SLinus Torvalds } 19321da177e4SLinus Torvalds 1933a9dd3643SJeff Mahoney free_journal_ram(sb); 19341da177e4SLinus Torvalds 19350523676dSFrederic Weisbecker reiserfs_write_lock(sb); 19360523676dSFrederic Weisbecker 19371da177e4SLinus Torvalds return 0; 19381da177e4SLinus Torvalds } 19391da177e4SLinus Torvalds 19401da177e4SLinus Torvalds /* 19411da177e4SLinus Torvalds ** call on unmount. flush all journal trans, release all alloc'd ram 19421da177e4SLinus Torvalds */ 1943bd4c625cSLinus Torvalds int journal_release(struct reiserfs_transaction_handle *th, 1944a9dd3643SJeff Mahoney struct super_block *sb) 1945bd4c625cSLinus Torvalds { 1946a9dd3643SJeff Mahoney return do_journal_release(th, sb, 0); 19471da177e4SLinus Torvalds } 1948bd4c625cSLinus Torvalds 19491da177e4SLinus Torvalds /* 19501da177e4SLinus Torvalds ** only call from an error condition inside reiserfs_read_super! 19511da177e4SLinus Torvalds */ 1952bd4c625cSLinus Torvalds int journal_release_error(struct reiserfs_transaction_handle *th, 1953a9dd3643SJeff Mahoney struct super_block *sb) 1954bd4c625cSLinus Torvalds { 1955a9dd3643SJeff Mahoney return do_journal_release(th, sb, 1); 19561da177e4SLinus Torvalds } 19571da177e4SLinus Torvalds 19581da177e4SLinus Torvalds /* compares description block with commit block. returns 1 if they differ, 0 if they are the same */ 1959a9dd3643SJeff Mahoney static int journal_compare_desc_commit(struct super_block *sb, 1960bd4c625cSLinus Torvalds struct reiserfs_journal_desc *desc, 1961bd4c625cSLinus Torvalds struct reiserfs_journal_commit *commit) 1962bd4c625cSLinus Torvalds { 19631da177e4SLinus Torvalds if (get_commit_trans_id(commit) != get_desc_trans_id(desc) || 19641da177e4SLinus Torvalds get_commit_trans_len(commit) != get_desc_trans_len(desc) || 1965a9dd3643SJeff Mahoney get_commit_trans_len(commit) > SB_JOURNAL(sb)->j_trans_max || 1966bd4c625cSLinus Torvalds get_commit_trans_len(commit) <= 0) { 19671da177e4SLinus Torvalds return 1; 19681da177e4SLinus Torvalds } 19691da177e4SLinus Torvalds return 0; 19701da177e4SLinus Torvalds } 1971bd4c625cSLinus Torvalds 19721da177e4SLinus Torvalds /* returns 0 if it did not find a description block 19731da177e4SLinus Torvalds ** returns -1 if it found a corrupt commit block 19741da177e4SLinus Torvalds ** returns 1 if both desc and commit were valid 19751da177e4SLinus Torvalds */ 1976a9dd3643SJeff Mahoney static int journal_transaction_is_valid(struct super_block *sb, 1977bd4c625cSLinus Torvalds struct buffer_head *d_bh, 1978600ed416SJeff Mahoney unsigned int *oldest_invalid_trans_id, 1979bd4c625cSLinus Torvalds unsigned long *newest_mount_id) 1980bd4c625cSLinus Torvalds { 19811da177e4SLinus Torvalds struct reiserfs_journal_desc *desc; 19821da177e4SLinus Torvalds struct reiserfs_journal_commit *commit; 19831da177e4SLinus Torvalds struct buffer_head *c_bh; 19841da177e4SLinus Torvalds unsigned long offset; 19851da177e4SLinus Torvalds 19861da177e4SLinus Torvalds if (!d_bh) 19871da177e4SLinus Torvalds return 0; 19881da177e4SLinus Torvalds 19891da177e4SLinus Torvalds desc = (struct reiserfs_journal_desc *)d_bh->b_data; 1990bd4c625cSLinus Torvalds if (get_desc_trans_len(desc) > 0 1991bd4c625cSLinus Torvalds && !memcmp(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8)) { 1992bd4c625cSLinus Torvalds if (oldest_invalid_trans_id && *oldest_invalid_trans_id 1993bd4c625cSLinus Torvalds && get_desc_trans_id(desc) > *oldest_invalid_trans_id) { 1994a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 1995bd4c625cSLinus Torvalds "journal-986: transaction " 19961da177e4SLinus Torvalds "is valid returning because trans_id %d is greater than " 1997bd4c625cSLinus Torvalds "oldest_invalid %lu", 1998bd4c625cSLinus Torvalds get_desc_trans_id(desc), 19991da177e4SLinus Torvalds *oldest_invalid_trans_id); 20001da177e4SLinus Torvalds return 0; 20011da177e4SLinus Torvalds } 2002bd4c625cSLinus Torvalds if (newest_mount_id 2003bd4c625cSLinus Torvalds && *newest_mount_id > get_desc_mount_id(desc)) { 2004a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2005bd4c625cSLinus Torvalds "journal-1087: transaction " 20061da177e4SLinus Torvalds "is valid returning because mount_id %d is less than " 2007bd4c625cSLinus Torvalds "newest_mount_id %lu", 2008bd4c625cSLinus Torvalds get_desc_mount_id(desc), 20091da177e4SLinus Torvalds *newest_mount_id); 20101da177e4SLinus Torvalds return -1; 20111da177e4SLinus Torvalds } 2012a9dd3643SJeff Mahoney if (get_desc_trans_len(desc) > SB_JOURNAL(sb)->j_trans_max) { 2013a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-2018", 201445b03d5eSJeff Mahoney "Bad transaction length %d " 201545b03d5eSJeff Mahoney "encountered, ignoring transaction", 2016bd4c625cSLinus Torvalds get_desc_trans_len(desc)); 20171da177e4SLinus Torvalds return -1; 20181da177e4SLinus Torvalds } 2019a9dd3643SJeff Mahoney offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb); 20201da177e4SLinus Torvalds 20211da177e4SLinus Torvalds /* ok, we have a journal description block, lets see if the transaction was valid */ 2022bd4c625cSLinus Torvalds c_bh = 2023a9dd3643SJeff Mahoney journal_bread(sb, 2024a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2025bd4c625cSLinus Torvalds ((offset + get_desc_trans_len(desc) + 2026a9dd3643SJeff Mahoney 1) % SB_ONDISK_JOURNAL_SIZE(sb))); 20271da177e4SLinus Torvalds if (!c_bh) 20281da177e4SLinus Torvalds return 0; 20291da177e4SLinus Torvalds commit = (struct reiserfs_journal_commit *)c_bh->b_data; 2030a9dd3643SJeff Mahoney if (journal_compare_desc_commit(sb, desc, commit)) { 2031a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 20321da177e4SLinus Torvalds "journal_transaction_is_valid, commit offset %ld had bad " 20331da177e4SLinus Torvalds "time %d or length %d", 2034bd4c625cSLinus Torvalds c_bh->b_blocknr - 2035a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb), 20361da177e4SLinus Torvalds get_commit_trans_id(commit), 20371da177e4SLinus Torvalds get_commit_trans_len(commit)); 20381da177e4SLinus Torvalds brelse(c_bh); 20391da177e4SLinus Torvalds if (oldest_invalid_trans_id) { 2040bd4c625cSLinus Torvalds *oldest_invalid_trans_id = 2041bd4c625cSLinus Torvalds get_desc_trans_id(desc); 2042a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2043bd4c625cSLinus Torvalds "journal-1004: " 20441da177e4SLinus Torvalds "transaction_is_valid setting oldest invalid trans_id " 2045bd4c625cSLinus Torvalds "to %d", 2046bd4c625cSLinus Torvalds get_desc_trans_id(desc)); 20471da177e4SLinus Torvalds } 20481da177e4SLinus Torvalds return -1; 20491da177e4SLinus Torvalds } 20501da177e4SLinus Torvalds brelse(c_bh); 2051a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2052bd4c625cSLinus Torvalds "journal-1006: found valid " 20531da177e4SLinus Torvalds "transaction start offset %llu, len %d id %d", 2054bd4c625cSLinus Torvalds d_bh->b_blocknr - 2055a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb), 2056bd4c625cSLinus Torvalds get_desc_trans_len(desc), 2057bd4c625cSLinus Torvalds get_desc_trans_id(desc)); 20581da177e4SLinus Torvalds return 1; 20591da177e4SLinus Torvalds } else { 20601da177e4SLinus Torvalds return 0; 20611da177e4SLinus Torvalds } 20621da177e4SLinus Torvalds } 20631da177e4SLinus Torvalds 2064bd4c625cSLinus Torvalds static void brelse_array(struct buffer_head **heads, int num) 2065bd4c625cSLinus Torvalds { 20661da177e4SLinus Torvalds int i; 20671da177e4SLinus Torvalds for (i = 0; i < num; i++) { 20681da177e4SLinus Torvalds brelse(heads[i]); 20691da177e4SLinus Torvalds } 20701da177e4SLinus Torvalds } 20711da177e4SLinus Torvalds 20721da177e4SLinus Torvalds /* 20731da177e4SLinus Torvalds ** given the start, and values for the oldest acceptable transactions, 20741da177e4SLinus Torvalds ** this either reads in a replays a transaction, or returns because the transaction 20751da177e4SLinus Torvalds ** is invalid, or too old. 20761da177e4SLinus Torvalds */ 2077a9dd3643SJeff Mahoney static int journal_read_transaction(struct super_block *sb, 2078bd4c625cSLinus Torvalds unsigned long cur_dblock, 2079bd4c625cSLinus Torvalds unsigned long oldest_start, 2080600ed416SJeff Mahoney unsigned int oldest_trans_id, 2081bd4c625cSLinus Torvalds unsigned long newest_mount_id) 2082bd4c625cSLinus Torvalds { 2083a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 20841da177e4SLinus Torvalds struct reiserfs_journal_desc *desc; 20851da177e4SLinus Torvalds struct reiserfs_journal_commit *commit; 2086600ed416SJeff Mahoney unsigned int trans_id = 0; 20871da177e4SLinus Torvalds struct buffer_head *c_bh; 20881da177e4SLinus Torvalds struct buffer_head *d_bh; 20891da177e4SLinus Torvalds struct buffer_head **log_blocks = NULL; 20901da177e4SLinus Torvalds struct buffer_head **real_blocks = NULL; 2091600ed416SJeff Mahoney unsigned int trans_offset; 20921da177e4SLinus Torvalds int i; 20931da177e4SLinus Torvalds int trans_half; 20941da177e4SLinus Torvalds 2095a9dd3643SJeff Mahoney d_bh = journal_bread(sb, cur_dblock); 20961da177e4SLinus Torvalds if (!d_bh) 20971da177e4SLinus Torvalds return 1; 20981da177e4SLinus Torvalds desc = (struct reiserfs_journal_desc *)d_bh->b_data; 2099a9dd3643SJeff Mahoney trans_offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb); 2100a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1037: " 21011da177e4SLinus Torvalds "journal_read_transaction, offset %llu, len %d mount_id %d", 2102a9dd3643SJeff Mahoney d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb), 21031da177e4SLinus Torvalds get_desc_trans_len(desc), get_desc_mount_id(desc)); 21041da177e4SLinus Torvalds if (get_desc_trans_id(desc) < oldest_trans_id) { 2105a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1039: " 21061da177e4SLinus Torvalds "journal_read_trans skipping because %lu is too old", 2107bd4c625cSLinus Torvalds cur_dblock - 2108a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb)); 21091da177e4SLinus Torvalds brelse(d_bh); 21101da177e4SLinus Torvalds return 1; 21111da177e4SLinus Torvalds } 21121da177e4SLinus Torvalds if (get_desc_mount_id(desc) != newest_mount_id) { 2113a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1146: " 21141da177e4SLinus Torvalds "journal_read_trans skipping because %d is != " 21151da177e4SLinus Torvalds "newest_mount_id %lu", get_desc_mount_id(desc), 21161da177e4SLinus Torvalds newest_mount_id); 21171da177e4SLinus Torvalds brelse(d_bh); 21181da177e4SLinus Torvalds return 1; 21191da177e4SLinus Torvalds } 2120a9dd3643SJeff Mahoney c_bh = journal_bread(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 21211da177e4SLinus Torvalds ((trans_offset + get_desc_trans_len(desc) + 1) % 2122a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb))); 21231da177e4SLinus Torvalds if (!c_bh) { 21241da177e4SLinus Torvalds brelse(d_bh); 21251da177e4SLinus Torvalds return 1; 21261da177e4SLinus Torvalds } 21271da177e4SLinus Torvalds commit = (struct reiserfs_journal_commit *)c_bh->b_data; 2128a9dd3643SJeff Mahoney if (journal_compare_desc_commit(sb, desc, commit)) { 2129a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2130bd4c625cSLinus Torvalds "journal_read_transaction, " 21311da177e4SLinus Torvalds "commit offset %llu had bad time %d or length %d", 2132bd4c625cSLinus Torvalds c_bh->b_blocknr - 2133a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb), 2134bd4c625cSLinus Torvalds get_commit_trans_id(commit), 2135bd4c625cSLinus Torvalds get_commit_trans_len(commit)); 21361da177e4SLinus Torvalds brelse(c_bh); 21371da177e4SLinus Torvalds brelse(d_bh); 21381da177e4SLinus Torvalds return 1; 21391da177e4SLinus Torvalds } 21403f8b5ee3SJeff Mahoney 21413f8b5ee3SJeff Mahoney if (bdev_read_only(sb->s_bdev)) { 21423f8b5ee3SJeff Mahoney reiserfs_warning(sb, "clm-2076", 21433f8b5ee3SJeff Mahoney "device is readonly, unable to replay log"); 21443f8b5ee3SJeff Mahoney brelse(c_bh); 21453f8b5ee3SJeff Mahoney brelse(d_bh); 21463f8b5ee3SJeff Mahoney return -EROFS; 21473f8b5ee3SJeff Mahoney } 21483f8b5ee3SJeff Mahoney 21491da177e4SLinus Torvalds trans_id = get_desc_trans_id(desc); 21501da177e4SLinus Torvalds /* now we know we've got a good transaction, and it was inside the valid time ranges */ 2151d739b42bSPekka Enberg log_blocks = kmalloc(get_desc_trans_len(desc) * 2152d739b42bSPekka Enberg sizeof(struct buffer_head *), GFP_NOFS); 2153d739b42bSPekka Enberg real_blocks = kmalloc(get_desc_trans_len(desc) * 2154d739b42bSPekka Enberg sizeof(struct buffer_head *), GFP_NOFS); 21551da177e4SLinus Torvalds if (!log_blocks || !real_blocks) { 21561da177e4SLinus Torvalds brelse(c_bh); 21571da177e4SLinus Torvalds brelse(d_bh); 2158d739b42bSPekka Enberg kfree(log_blocks); 2159d739b42bSPekka Enberg kfree(real_blocks); 2160a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1169", 216145b03d5eSJeff Mahoney "kmalloc failed, unable to mount FS"); 21621da177e4SLinus Torvalds return -1; 21631da177e4SLinus Torvalds } 21641da177e4SLinus Torvalds /* get all the buffer heads */ 2165a9dd3643SJeff Mahoney trans_half = journal_trans_half(sb->s_blocksize); 21661da177e4SLinus Torvalds for (i = 0; i < get_desc_trans_len(desc); i++) { 2167bd4c625cSLinus Torvalds log_blocks[i] = 2168a9dd3643SJeff Mahoney journal_getblk(sb, 2169a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2170bd4c625cSLinus Torvalds (trans_offset + 1 + 2171a9dd3643SJeff Mahoney i) % SB_ONDISK_JOURNAL_SIZE(sb)); 21721da177e4SLinus Torvalds if (i < trans_half) { 2173bd4c625cSLinus Torvalds real_blocks[i] = 2174a9dd3643SJeff Mahoney sb_getblk(sb, 2175bd4c625cSLinus Torvalds le32_to_cpu(desc->j_realblock[i])); 21761da177e4SLinus Torvalds } else { 2177bd4c625cSLinus Torvalds real_blocks[i] = 2178a9dd3643SJeff Mahoney sb_getblk(sb, 2179bd4c625cSLinus Torvalds le32_to_cpu(commit-> 2180bd4c625cSLinus Torvalds j_realblock[i - trans_half])); 21811da177e4SLinus Torvalds } 2182a9dd3643SJeff Mahoney if (real_blocks[i]->b_blocknr > SB_BLOCK_COUNT(sb)) { 2183a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1207", 218445b03d5eSJeff Mahoney "REPLAY FAILURE fsck required! " 218545b03d5eSJeff Mahoney "Block to replay is outside of " 218645b03d5eSJeff Mahoney "filesystem"); 21871da177e4SLinus Torvalds goto abort_replay; 21881da177e4SLinus Torvalds } 21891da177e4SLinus Torvalds /* make sure we don't try to replay onto log or reserved area */ 2190bd4c625cSLinus Torvalds if (is_block_in_log_or_reserved_area 2191a9dd3643SJeff Mahoney (sb, real_blocks[i]->b_blocknr)) { 2192a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1204", 219345b03d5eSJeff Mahoney "REPLAY FAILURE fsck required! " 219445b03d5eSJeff Mahoney "Trying to replay onto a log block"); 21951da177e4SLinus Torvalds abort_replay: 21961da177e4SLinus Torvalds brelse_array(log_blocks, i); 21971da177e4SLinus Torvalds brelse_array(real_blocks, i); 21981da177e4SLinus Torvalds brelse(c_bh); 21991da177e4SLinus Torvalds brelse(d_bh); 2200d739b42bSPekka Enberg kfree(log_blocks); 2201d739b42bSPekka Enberg kfree(real_blocks); 22021da177e4SLinus Torvalds return -1; 22031da177e4SLinus Torvalds } 22041da177e4SLinus Torvalds } 22051da177e4SLinus Torvalds /* read in the log blocks, memcpy to the corresponding real block */ 22061da177e4SLinus Torvalds ll_rw_block(READ, get_desc_trans_len(desc), log_blocks); 22071da177e4SLinus Torvalds for (i = 0; i < get_desc_trans_len(desc); i++) { 22088ebc4232SFrederic Weisbecker 22098ebc4232SFrederic Weisbecker reiserfs_write_unlock(sb); 22101da177e4SLinus Torvalds wait_on_buffer(log_blocks[i]); 22118ebc4232SFrederic Weisbecker reiserfs_write_lock(sb); 22128ebc4232SFrederic Weisbecker 22131da177e4SLinus Torvalds if (!buffer_uptodate(log_blocks[i])) { 2214a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1212", 221545b03d5eSJeff Mahoney "REPLAY FAILURE fsck required! " 221645b03d5eSJeff Mahoney "buffer write failed"); 2217bd4c625cSLinus Torvalds brelse_array(log_blocks + i, 2218bd4c625cSLinus Torvalds get_desc_trans_len(desc) - i); 22191da177e4SLinus Torvalds brelse_array(real_blocks, get_desc_trans_len(desc)); 22201da177e4SLinus Torvalds brelse(c_bh); 22211da177e4SLinus Torvalds brelse(d_bh); 2222d739b42bSPekka Enberg kfree(log_blocks); 2223d739b42bSPekka Enberg kfree(real_blocks); 22241da177e4SLinus Torvalds return -1; 22251da177e4SLinus Torvalds } 2226bd4c625cSLinus Torvalds memcpy(real_blocks[i]->b_data, log_blocks[i]->b_data, 2227bd4c625cSLinus Torvalds real_blocks[i]->b_size); 22281da177e4SLinus Torvalds set_buffer_uptodate(real_blocks[i]); 22291da177e4SLinus Torvalds brelse(log_blocks[i]); 22301da177e4SLinus Torvalds } 22311da177e4SLinus Torvalds /* flush out the real blocks */ 22321da177e4SLinus Torvalds for (i = 0; i < get_desc_trans_len(desc); i++) { 22331da177e4SLinus Torvalds set_buffer_dirty(real_blocks[i]); 22349cb569d6SChristoph Hellwig write_dirty_buffer(real_blocks[i], WRITE); 22351da177e4SLinus Torvalds } 22361da177e4SLinus Torvalds for (i = 0; i < get_desc_trans_len(desc); i++) { 22371da177e4SLinus Torvalds wait_on_buffer(real_blocks[i]); 22381da177e4SLinus Torvalds if (!buffer_uptodate(real_blocks[i])) { 2239a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1226", 224045b03d5eSJeff Mahoney "REPLAY FAILURE, fsck required! " 224145b03d5eSJeff Mahoney "buffer write failed"); 2242bd4c625cSLinus Torvalds brelse_array(real_blocks + i, 2243bd4c625cSLinus Torvalds get_desc_trans_len(desc) - i); 22441da177e4SLinus Torvalds brelse(c_bh); 22451da177e4SLinus Torvalds brelse(d_bh); 2246d739b42bSPekka Enberg kfree(log_blocks); 2247d739b42bSPekka Enberg kfree(real_blocks); 22481da177e4SLinus Torvalds return -1; 22491da177e4SLinus Torvalds } 22501da177e4SLinus Torvalds brelse(real_blocks[i]); 22511da177e4SLinus Torvalds } 2252bd4c625cSLinus Torvalds cur_dblock = 2253a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2254bd4c625cSLinus Torvalds ((trans_offset + get_desc_trans_len(desc) + 2255a9dd3643SJeff Mahoney 2) % SB_ONDISK_JOURNAL_SIZE(sb)); 2256a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2257bd4c625cSLinus Torvalds "journal-1095: setting journal " "start to offset %ld", 2258a9dd3643SJeff Mahoney cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb)); 22591da177e4SLinus Torvalds 22601da177e4SLinus Torvalds /* init starting values for the first transaction, in case this is the last transaction to be replayed. */ 2261a9dd3643SJeff Mahoney journal->j_start = cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb); 22621da177e4SLinus Torvalds journal->j_last_flush_trans_id = trans_id; 22631da177e4SLinus Torvalds journal->j_trans_id = trans_id + 1; 2264a44c94a7SAlexander Zarochentsev /* check for trans_id overflow */ 2265a44c94a7SAlexander Zarochentsev if (journal->j_trans_id == 0) 2266a44c94a7SAlexander Zarochentsev journal->j_trans_id = 10; 22671da177e4SLinus Torvalds brelse(c_bh); 22681da177e4SLinus Torvalds brelse(d_bh); 2269d739b42bSPekka Enberg kfree(log_blocks); 2270d739b42bSPekka Enberg kfree(real_blocks); 22711da177e4SLinus Torvalds return 0; 22721da177e4SLinus Torvalds } 22731da177e4SLinus Torvalds 22741da177e4SLinus Torvalds /* This function reads blocks starting from block and to max_block of bufsize 22751da177e4SLinus Torvalds size (but no more than BUFNR blocks at a time). This proved to improve 22761da177e4SLinus Torvalds mounting speed on self-rebuilding raid5 arrays at least. 22771da177e4SLinus Torvalds Right now it is only used from journal code. But later we might use it 22781da177e4SLinus Torvalds from other places. 22791da177e4SLinus Torvalds Note: Do not use journal_getblk/sb_getblk functions here! */ 22803ee16670SJeff Mahoney static struct buffer_head *reiserfs_breada(struct block_device *dev, 22813ee16670SJeff Mahoney b_blocknr_t block, int bufsize, 22823ee16670SJeff Mahoney b_blocknr_t max_block) 22831da177e4SLinus Torvalds { 22841da177e4SLinus Torvalds struct buffer_head *bhlist[BUFNR]; 22851da177e4SLinus Torvalds unsigned int blocks = BUFNR; 22861da177e4SLinus Torvalds struct buffer_head *bh; 22871da177e4SLinus Torvalds int i, j; 22881da177e4SLinus Torvalds 22891da177e4SLinus Torvalds bh = __getblk(dev, block, bufsize); 22901da177e4SLinus Torvalds if (buffer_uptodate(bh)) 22911da177e4SLinus Torvalds return (bh); 22921da177e4SLinus Torvalds 22931da177e4SLinus Torvalds if (block + BUFNR > max_block) { 22941da177e4SLinus Torvalds blocks = max_block - block; 22951da177e4SLinus Torvalds } 22961da177e4SLinus Torvalds bhlist[0] = bh; 22971da177e4SLinus Torvalds j = 1; 22981da177e4SLinus Torvalds for (i = 1; i < blocks; i++) { 22991da177e4SLinus Torvalds bh = __getblk(dev, block + i, bufsize); 23001da177e4SLinus Torvalds if (buffer_uptodate(bh)) { 23011da177e4SLinus Torvalds brelse(bh); 23021da177e4SLinus Torvalds break; 2303bd4c625cSLinus Torvalds } else 2304bd4c625cSLinus Torvalds bhlist[j++] = bh; 23051da177e4SLinus Torvalds } 23061da177e4SLinus Torvalds ll_rw_block(READ, j, bhlist); 23071da177e4SLinus Torvalds for (i = 1; i < j; i++) 23081da177e4SLinus Torvalds brelse(bhlist[i]); 23091da177e4SLinus Torvalds bh = bhlist[0]; 23101da177e4SLinus Torvalds wait_on_buffer(bh); 23111da177e4SLinus Torvalds if (buffer_uptodate(bh)) 23121da177e4SLinus Torvalds return bh; 23131da177e4SLinus Torvalds brelse(bh); 23141da177e4SLinus Torvalds return NULL; 23151da177e4SLinus Torvalds } 23161da177e4SLinus Torvalds 23171da177e4SLinus Torvalds /* 23181da177e4SLinus Torvalds ** read and replay the log 23191da177e4SLinus Torvalds ** on a clean unmount, the journal header's next unflushed pointer will be to an invalid 23201da177e4SLinus Torvalds ** transaction. This tests that before finding all the transactions in the log, which makes normal mount times fast. 23211da177e4SLinus Torvalds ** 23221da177e4SLinus Torvalds ** After a crash, this starts with the next unflushed transaction, and replays until it finds one too old, or invalid. 23231da177e4SLinus Torvalds ** 23241da177e4SLinus Torvalds ** On exit, it sets things up so the first transaction will work correctly. 23251da177e4SLinus Torvalds */ 2326a9dd3643SJeff Mahoney static int journal_read(struct super_block *sb) 2327bd4c625cSLinus Torvalds { 2328a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 23291da177e4SLinus Torvalds struct reiserfs_journal_desc *desc; 2330600ed416SJeff Mahoney unsigned int oldest_trans_id = 0; 2331600ed416SJeff Mahoney unsigned int oldest_invalid_trans_id = 0; 23321da177e4SLinus Torvalds time_t start; 23331da177e4SLinus Torvalds unsigned long oldest_start = 0; 23341da177e4SLinus Torvalds unsigned long cur_dblock = 0; 23351da177e4SLinus Torvalds unsigned long newest_mount_id = 9; 23361da177e4SLinus Torvalds struct buffer_head *d_bh; 23371da177e4SLinus Torvalds struct reiserfs_journal_header *jh; 23381da177e4SLinus Torvalds int valid_journal_header = 0; 23391da177e4SLinus Torvalds int replay_count = 0; 23401da177e4SLinus Torvalds int continue_replay = 1; 23411da177e4SLinus Torvalds int ret; 23421da177e4SLinus Torvalds char b[BDEVNAME_SIZE]; 23431da177e4SLinus Torvalds 2344a9dd3643SJeff Mahoney cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(sb); 2345a9dd3643SJeff Mahoney reiserfs_info(sb, "checking transaction log (%s)\n", 23461da177e4SLinus Torvalds bdevname(journal->j_dev_bd, b)); 23471da177e4SLinus Torvalds start = get_seconds(); 23481da177e4SLinus Torvalds 23491da177e4SLinus Torvalds /* step 1, read in the journal header block. Check the transaction it says 23501da177e4SLinus Torvalds ** is the first unflushed, and if that transaction is not valid, 23511da177e4SLinus Torvalds ** replay is done 23521da177e4SLinus Torvalds */ 2353a9dd3643SJeff Mahoney journal->j_header_bh = journal_bread(sb, 2354a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) 2355a9dd3643SJeff Mahoney + SB_ONDISK_JOURNAL_SIZE(sb)); 23561da177e4SLinus Torvalds if (!journal->j_header_bh) { 23571da177e4SLinus Torvalds return 1; 23581da177e4SLinus Torvalds } 23591da177e4SLinus Torvalds jh = (struct reiserfs_journal_header *)(journal->j_header_bh->b_data); 2360c499ec24SVladimir V. Saveliev if (le32_to_cpu(jh->j_first_unflushed_offset) < 2361a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb) 2362bd4c625cSLinus Torvalds && le32_to_cpu(jh->j_last_flush_trans_id) > 0) { 2363bd4c625cSLinus Torvalds oldest_start = 2364a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 23651da177e4SLinus Torvalds le32_to_cpu(jh->j_first_unflushed_offset); 23661da177e4SLinus Torvalds oldest_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) + 1; 23671da177e4SLinus Torvalds newest_mount_id = le32_to_cpu(jh->j_mount_id); 2368a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2369bd4c625cSLinus Torvalds "journal-1153: found in " 23701da177e4SLinus Torvalds "header: first_unflushed_offset %d, last_flushed_trans_id " 23711da177e4SLinus Torvalds "%lu", le32_to_cpu(jh->j_first_unflushed_offset), 23721da177e4SLinus Torvalds le32_to_cpu(jh->j_last_flush_trans_id)); 23731da177e4SLinus Torvalds valid_journal_header = 1; 23741da177e4SLinus Torvalds 23751da177e4SLinus Torvalds /* now, we try to read the first unflushed offset. If it is not valid, 23761da177e4SLinus Torvalds ** there is nothing more we can do, and it makes no sense to read 23771da177e4SLinus Torvalds ** through the whole log. 23781da177e4SLinus Torvalds */ 2379bd4c625cSLinus Torvalds d_bh = 2380a9dd3643SJeff Mahoney journal_bread(sb, 2381a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2382bd4c625cSLinus Torvalds le32_to_cpu(jh->j_first_unflushed_offset)); 2383a9dd3643SJeff Mahoney ret = journal_transaction_is_valid(sb, d_bh, NULL, NULL); 23841da177e4SLinus Torvalds if (!ret) { 23851da177e4SLinus Torvalds continue_replay = 0; 23861da177e4SLinus Torvalds } 23871da177e4SLinus Torvalds brelse(d_bh); 23881da177e4SLinus Torvalds goto start_log_replay; 23891da177e4SLinus Torvalds } 23901da177e4SLinus Torvalds 23911da177e4SLinus Torvalds /* ok, there are transactions that need to be replayed. start with the first log block, find 23921da177e4SLinus Torvalds ** all the valid transactions, and pick out the oldest. 23931da177e4SLinus Torvalds */ 2394bd4c625cSLinus Torvalds while (continue_replay 2395bd4c625cSLinus Torvalds && cur_dblock < 2396a9dd3643SJeff Mahoney (SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2397a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb))) { 23981da177e4SLinus Torvalds /* Note that it is required for blocksize of primary fs device and journal 23991da177e4SLinus Torvalds device to be the same */ 2400bd4c625cSLinus Torvalds d_bh = 2401bd4c625cSLinus Torvalds reiserfs_breada(journal->j_dev_bd, cur_dblock, 2402a9dd3643SJeff Mahoney sb->s_blocksize, 2403a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2404a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb)); 2405bd4c625cSLinus Torvalds ret = 2406a9dd3643SJeff Mahoney journal_transaction_is_valid(sb, d_bh, 2407bd4c625cSLinus Torvalds &oldest_invalid_trans_id, 2408bd4c625cSLinus Torvalds &newest_mount_id); 24091da177e4SLinus Torvalds if (ret == 1) { 24101da177e4SLinus Torvalds desc = (struct reiserfs_journal_desc *)d_bh->b_data; 24111da177e4SLinus Torvalds if (oldest_start == 0) { /* init all oldest_ values */ 24121da177e4SLinus Torvalds oldest_trans_id = get_desc_trans_id(desc); 24131da177e4SLinus Torvalds oldest_start = d_bh->b_blocknr; 24141da177e4SLinus Torvalds newest_mount_id = get_desc_mount_id(desc); 2415a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2416bd4c625cSLinus Torvalds "journal-1179: Setting " 24171da177e4SLinus Torvalds "oldest_start to offset %llu, trans_id %lu", 2418bd4c625cSLinus Torvalds oldest_start - 2419bd4c625cSLinus Torvalds SB_ONDISK_JOURNAL_1st_BLOCK 2420a9dd3643SJeff Mahoney (sb), oldest_trans_id); 24211da177e4SLinus Torvalds } else if (oldest_trans_id > get_desc_trans_id(desc)) { 24221da177e4SLinus Torvalds /* one we just read was older */ 24231da177e4SLinus Torvalds oldest_trans_id = get_desc_trans_id(desc); 24241da177e4SLinus Torvalds oldest_start = d_bh->b_blocknr; 2425a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2426bd4c625cSLinus Torvalds "journal-1180: Resetting " 24271da177e4SLinus Torvalds "oldest_start to offset %lu, trans_id %lu", 2428bd4c625cSLinus Torvalds oldest_start - 2429bd4c625cSLinus Torvalds SB_ONDISK_JOURNAL_1st_BLOCK 2430a9dd3643SJeff Mahoney (sb), oldest_trans_id); 24311da177e4SLinus Torvalds } 24321da177e4SLinus Torvalds if (newest_mount_id < get_desc_mount_id(desc)) { 24331da177e4SLinus Torvalds newest_mount_id = get_desc_mount_id(desc); 2434a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2435bd4c625cSLinus Torvalds "journal-1299: Setting " 2436bd4c625cSLinus Torvalds "newest_mount_id to %d", 2437bd4c625cSLinus Torvalds get_desc_mount_id(desc)); 24381da177e4SLinus Torvalds } 24391da177e4SLinus Torvalds cur_dblock += get_desc_trans_len(desc) + 2; 24401da177e4SLinus Torvalds } else { 24411da177e4SLinus Torvalds cur_dblock++; 24421da177e4SLinus Torvalds } 24431da177e4SLinus Torvalds brelse(d_bh); 24441da177e4SLinus Torvalds } 24451da177e4SLinus Torvalds 24461da177e4SLinus Torvalds start_log_replay: 24471da177e4SLinus Torvalds cur_dblock = oldest_start; 24481da177e4SLinus Torvalds if (oldest_trans_id) { 2449a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2450bd4c625cSLinus Torvalds "journal-1206: Starting replay " 24511da177e4SLinus Torvalds "from offset %llu, trans_id %lu", 2452a9dd3643SJeff Mahoney cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb), 24531da177e4SLinus Torvalds oldest_trans_id); 24541da177e4SLinus Torvalds 24551da177e4SLinus Torvalds } 24561da177e4SLinus Torvalds replay_count = 0; 24571da177e4SLinus Torvalds while (continue_replay && oldest_trans_id > 0) { 2458bd4c625cSLinus Torvalds ret = 2459a9dd3643SJeff Mahoney journal_read_transaction(sb, cur_dblock, oldest_start, 2460bd4c625cSLinus Torvalds oldest_trans_id, newest_mount_id); 24611da177e4SLinus Torvalds if (ret < 0) { 24621da177e4SLinus Torvalds return ret; 24631da177e4SLinus Torvalds } else if (ret != 0) { 24641da177e4SLinus Torvalds break; 24651da177e4SLinus Torvalds } 2466bd4c625cSLinus Torvalds cur_dblock = 2467a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + journal->j_start; 24681da177e4SLinus Torvalds replay_count++; 24691da177e4SLinus Torvalds if (cur_dblock == oldest_start) 24701da177e4SLinus Torvalds break; 24711da177e4SLinus Torvalds } 24721da177e4SLinus Torvalds 24731da177e4SLinus Torvalds if (oldest_trans_id == 0) { 2474a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2475bd4c625cSLinus Torvalds "journal-1225: No valid " "transactions found"); 24761da177e4SLinus Torvalds } 24771da177e4SLinus Torvalds /* j_start does not get set correctly if we don't replay any transactions. 24781da177e4SLinus Torvalds ** if we had a valid journal_header, set j_start to the first unflushed transaction value, 24791da177e4SLinus Torvalds ** copy the trans_id from the header 24801da177e4SLinus Torvalds */ 24811da177e4SLinus Torvalds if (valid_journal_header && replay_count == 0) { 24821da177e4SLinus Torvalds journal->j_start = le32_to_cpu(jh->j_first_unflushed_offset); 2483bd4c625cSLinus Torvalds journal->j_trans_id = 2484bd4c625cSLinus Torvalds le32_to_cpu(jh->j_last_flush_trans_id) + 1; 2485a44c94a7SAlexander Zarochentsev /* check for trans_id overflow */ 2486a44c94a7SAlexander Zarochentsev if (journal->j_trans_id == 0) 2487a44c94a7SAlexander Zarochentsev journal->j_trans_id = 10; 2488bd4c625cSLinus Torvalds journal->j_last_flush_trans_id = 2489bd4c625cSLinus Torvalds le32_to_cpu(jh->j_last_flush_trans_id); 24901da177e4SLinus Torvalds journal->j_mount_id = le32_to_cpu(jh->j_mount_id) + 1; 24911da177e4SLinus Torvalds } else { 24921da177e4SLinus Torvalds journal->j_mount_id = newest_mount_id + 1; 24931da177e4SLinus Torvalds } 2494a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1299: Setting " 24951da177e4SLinus Torvalds "newest_mount_id to %lu", journal->j_mount_id); 24961da177e4SLinus Torvalds journal->j_first_unflushed_offset = journal->j_start; 24971da177e4SLinus Torvalds if (replay_count > 0) { 2498a9dd3643SJeff Mahoney reiserfs_info(sb, 2499bd4c625cSLinus Torvalds "replayed %d transactions in %lu seconds\n", 25001da177e4SLinus Torvalds replay_count, get_seconds() - start); 25011da177e4SLinus Torvalds } 2502a9dd3643SJeff Mahoney if (!bdev_read_only(sb->s_bdev) && 2503a9dd3643SJeff Mahoney _update_journal_header_block(sb, journal->j_start, 2504bd4c625cSLinus Torvalds journal->j_last_flush_trans_id)) { 25051da177e4SLinus Torvalds /* replay failed, caller must call free_journal_ram and abort 25061da177e4SLinus Torvalds ** the mount 25071da177e4SLinus Torvalds */ 25081da177e4SLinus Torvalds return -1; 25091da177e4SLinus Torvalds } 25101da177e4SLinus Torvalds return 0; 25111da177e4SLinus Torvalds } 25121da177e4SLinus Torvalds 25131da177e4SLinus Torvalds static struct reiserfs_journal_list *alloc_journal_list(struct super_block *s) 25141da177e4SLinus Torvalds { 25151da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 25168c777cc4SPekka Enberg jl = kzalloc(sizeof(struct reiserfs_journal_list), 25178c777cc4SPekka Enberg GFP_NOFS | __GFP_NOFAIL); 25181da177e4SLinus Torvalds INIT_LIST_HEAD(&jl->j_list); 25191da177e4SLinus Torvalds INIT_LIST_HEAD(&jl->j_working_list); 25201da177e4SLinus Torvalds INIT_LIST_HEAD(&jl->j_tail_bh_list); 25211da177e4SLinus Torvalds INIT_LIST_HEAD(&jl->j_bh_list); 252290415deaSJeff Mahoney mutex_init(&jl->j_commit_mutex); 25231da177e4SLinus Torvalds SB_JOURNAL(s)->j_num_lists++; 25241da177e4SLinus Torvalds get_journal_list(jl); 25251da177e4SLinus Torvalds return jl; 25261da177e4SLinus Torvalds } 25271da177e4SLinus Torvalds 2528a9dd3643SJeff Mahoney static void journal_list_init(struct super_block *sb) 2529bd4c625cSLinus Torvalds { 2530a9dd3643SJeff Mahoney SB_JOURNAL(sb)->j_current_jl = alloc_journal_list(sb); 25311da177e4SLinus Torvalds } 25321da177e4SLinus Torvalds 25331da177e4SLinus Torvalds static int release_journal_dev(struct super_block *super, 25341da177e4SLinus Torvalds struct reiserfs_journal *journal) 25351da177e4SLinus Torvalds { 25361da177e4SLinus Torvalds int result; 25371da177e4SLinus Torvalds 25381da177e4SLinus Torvalds result = 0; 25391da177e4SLinus Torvalds 254086098fa0SChristoph Hellwig if (journal->j_dev_bd != NULL) { 2541e5eb8caaSAl Viro result = blkdev_put(journal->j_dev_bd, journal->j_dev_mode); 25421da177e4SLinus Torvalds journal->j_dev_bd = NULL; 25431da177e4SLinus Torvalds } 25441da177e4SLinus Torvalds 25451da177e4SLinus Torvalds if (result != 0) { 254645b03d5eSJeff Mahoney reiserfs_warning(super, "sh-457", 254745b03d5eSJeff Mahoney "Cannot release journal device: %i", result); 25481da177e4SLinus Torvalds } 25491da177e4SLinus Torvalds return result; 25501da177e4SLinus Torvalds } 25511da177e4SLinus Torvalds 25521da177e4SLinus Torvalds static int journal_init_dev(struct super_block *super, 25531da177e4SLinus Torvalds struct reiserfs_journal *journal, 25541da177e4SLinus Torvalds const char *jdev_name) 25551da177e4SLinus Torvalds { 25561da177e4SLinus Torvalds int result; 25571da177e4SLinus Torvalds dev_t jdev; 2558e525fd89STejun Heo fmode_t blkdev_mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL; 25591da177e4SLinus Torvalds char b[BDEVNAME_SIZE]; 25601da177e4SLinus Torvalds 25611da177e4SLinus Torvalds result = 0; 25621da177e4SLinus Torvalds 25631da177e4SLinus Torvalds journal->j_dev_bd = NULL; 25641da177e4SLinus Torvalds jdev = SB_ONDISK_JOURNAL_DEVICE(super) ? 25651da177e4SLinus Torvalds new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super)) : super->s_dev; 25661da177e4SLinus Torvalds 25671da177e4SLinus Torvalds if (bdev_read_only(super->s_bdev)) 25681da177e4SLinus Torvalds blkdev_mode = FMODE_READ; 25691da177e4SLinus Torvalds 25701da177e4SLinus Torvalds /* there is no "jdev" option and journal is on separate device */ 25711da177e4SLinus Torvalds if ((!jdev_name || !jdev_name[0])) { 2572e525fd89STejun Heo if (jdev == super->s_dev) 2573e525fd89STejun Heo blkdev_mode &= ~FMODE_EXCL; 2574d4d77629STejun Heo journal->j_dev_bd = blkdev_get_by_dev(jdev, blkdev_mode, 2575d4d77629STejun Heo journal); 2576e5eb8caaSAl Viro journal->j_dev_mode = blkdev_mode; 25771da177e4SLinus Torvalds if (IS_ERR(journal->j_dev_bd)) { 25781da177e4SLinus Torvalds result = PTR_ERR(journal->j_dev_bd); 25791da177e4SLinus Torvalds journal->j_dev_bd = NULL; 258045b03d5eSJeff Mahoney reiserfs_warning(super, "sh-458", 25811da177e4SLinus Torvalds "cannot init journal device '%s': %i", 25821da177e4SLinus Torvalds __bdevname(jdev, b), result); 25831da177e4SLinus Torvalds return result; 2584e525fd89STejun Heo } else if (jdev != super->s_dev) 25851da177e4SLinus Torvalds set_blocksize(journal->j_dev_bd, super->s_blocksize); 258686098fa0SChristoph Hellwig 25871da177e4SLinus Torvalds return 0; 25881da177e4SLinus Torvalds } 25891da177e4SLinus Torvalds 2590e5eb8caaSAl Viro journal->j_dev_mode = blkdev_mode; 2591d4d77629STejun Heo journal->j_dev_bd = blkdev_get_by_path(jdev_name, blkdev_mode, journal); 259286098fa0SChristoph Hellwig if (IS_ERR(journal->j_dev_bd)) { 259386098fa0SChristoph Hellwig result = PTR_ERR(journal->j_dev_bd); 259486098fa0SChristoph Hellwig journal->j_dev_bd = NULL; 259586098fa0SChristoph Hellwig reiserfs_warning(super, 259686098fa0SChristoph Hellwig "journal_init_dev: Cannot open '%s': %i", 259786098fa0SChristoph Hellwig jdev_name, result); 259886098fa0SChristoph Hellwig return result; 259986098fa0SChristoph Hellwig } 260086098fa0SChristoph Hellwig 26011da177e4SLinus Torvalds set_blocksize(journal->j_dev_bd, super->s_blocksize); 2602bd4c625cSLinus Torvalds reiserfs_info(super, 2603bd4c625cSLinus Torvalds "journal_init_dev: journal device: %s\n", 260474f9f974SEdward Shishkin bdevname(journal->j_dev_bd, b)); 260586098fa0SChristoph Hellwig return 0; 26061da177e4SLinus Torvalds } 26071da177e4SLinus Torvalds 2608cf3d0b81SEdward Shishkin /** 2609cf3d0b81SEdward Shishkin * When creating/tuning a file system user can assign some 2610cf3d0b81SEdward Shishkin * journal params within boundaries which depend on the ratio 2611cf3d0b81SEdward Shishkin * blocksize/standard_blocksize. 2612cf3d0b81SEdward Shishkin * 2613cf3d0b81SEdward Shishkin * For blocks >= standard_blocksize transaction size should 2614cf3d0b81SEdward Shishkin * be not less then JOURNAL_TRANS_MIN_DEFAULT, and not more 2615cf3d0b81SEdward Shishkin * then JOURNAL_TRANS_MAX_DEFAULT. 2616cf3d0b81SEdward Shishkin * 2617cf3d0b81SEdward Shishkin * For blocks < standard_blocksize these boundaries should be 2618cf3d0b81SEdward Shishkin * decreased proportionally. 2619cf3d0b81SEdward Shishkin */ 2620cf3d0b81SEdward Shishkin #define REISERFS_STANDARD_BLKSIZE (4096) 2621cf3d0b81SEdward Shishkin 2622a9dd3643SJeff Mahoney static int check_advise_trans_params(struct super_block *sb, 2623cf3d0b81SEdward Shishkin struct reiserfs_journal *journal) 2624cf3d0b81SEdward Shishkin { 2625cf3d0b81SEdward Shishkin if (journal->j_trans_max) { 2626cf3d0b81SEdward Shishkin /* Non-default journal params. 2627cf3d0b81SEdward Shishkin Do sanity check for them. */ 2628cf3d0b81SEdward Shishkin int ratio = 1; 2629a9dd3643SJeff Mahoney if (sb->s_blocksize < REISERFS_STANDARD_BLKSIZE) 2630a9dd3643SJeff Mahoney ratio = REISERFS_STANDARD_BLKSIZE / sb->s_blocksize; 2631cf3d0b81SEdward Shishkin 2632cf3d0b81SEdward Shishkin if (journal->j_trans_max > JOURNAL_TRANS_MAX_DEFAULT / ratio || 2633cf3d0b81SEdward Shishkin journal->j_trans_max < JOURNAL_TRANS_MIN_DEFAULT / ratio || 2634a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb) / journal->j_trans_max < 2635cf3d0b81SEdward Shishkin JOURNAL_MIN_RATIO) { 2636a9dd3643SJeff Mahoney reiserfs_warning(sb, "sh-462", 263745b03d5eSJeff Mahoney "bad transaction max size (%u). " 263845b03d5eSJeff Mahoney "FSCK?", journal->j_trans_max); 2639cf3d0b81SEdward Shishkin return 1; 2640cf3d0b81SEdward Shishkin } 2641cf3d0b81SEdward Shishkin if (journal->j_max_batch != (journal->j_trans_max) * 2642cf3d0b81SEdward Shishkin JOURNAL_MAX_BATCH_DEFAULT/JOURNAL_TRANS_MAX_DEFAULT) { 2643a9dd3643SJeff Mahoney reiserfs_warning(sb, "sh-463", 264445b03d5eSJeff Mahoney "bad transaction max batch (%u). " 264545b03d5eSJeff Mahoney "FSCK?", journal->j_max_batch); 2646cf3d0b81SEdward Shishkin return 1; 2647cf3d0b81SEdward Shishkin } 2648cf3d0b81SEdward Shishkin } else { 2649cf3d0b81SEdward Shishkin /* Default journal params. 2650cf3d0b81SEdward Shishkin The file system was created by old version 2651cf3d0b81SEdward Shishkin of mkreiserfs, so some fields contain zeros, 2652cf3d0b81SEdward Shishkin and we need to advise proper values for them */ 2653a9dd3643SJeff Mahoney if (sb->s_blocksize != REISERFS_STANDARD_BLKSIZE) { 2654a9dd3643SJeff Mahoney reiserfs_warning(sb, "sh-464", "bad blocksize (%u)", 2655a9dd3643SJeff Mahoney sb->s_blocksize); 265645b03d5eSJeff Mahoney return 1; 265745b03d5eSJeff Mahoney } 2658cf3d0b81SEdward Shishkin journal->j_trans_max = JOURNAL_TRANS_MAX_DEFAULT; 2659cf3d0b81SEdward Shishkin journal->j_max_batch = JOURNAL_MAX_BATCH_DEFAULT; 2660cf3d0b81SEdward Shishkin journal->j_max_commit_age = JOURNAL_MAX_COMMIT_AGE; 2661cf3d0b81SEdward Shishkin } 2662cf3d0b81SEdward Shishkin return 0; 2663cf3d0b81SEdward Shishkin } 2664cf3d0b81SEdward Shishkin 26651da177e4SLinus Torvalds /* 26661da177e4SLinus Torvalds ** must be called once on fs mount. calls journal_read for you 26671da177e4SLinus Torvalds */ 2668a9dd3643SJeff Mahoney int journal_init(struct super_block *sb, const char *j_dev_name, 2669bd4c625cSLinus Torvalds int old_format, unsigned int commit_max_age) 2670bd4c625cSLinus Torvalds { 2671a9dd3643SJeff Mahoney int num_cnodes = SB_ONDISK_JOURNAL_SIZE(sb) * 2; 26721da177e4SLinus Torvalds struct buffer_head *bhjh; 26731da177e4SLinus Torvalds struct reiserfs_super_block *rs; 26741da177e4SLinus Torvalds struct reiserfs_journal_header *jh; 26751da177e4SLinus Torvalds struct reiserfs_journal *journal; 26761da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 26771da177e4SLinus Torvalds char b[BDEVNAME_SIZE]; 267898ea3f50SFrederic Weisbecker int ret; 26791da177e4SLinus Torvalds 2680558feb08SJoe Perches journal = SB_JOURNAL(sb) = vzalloc(sizeof(struct reiserfs_journal)); 26811da177e4SLinus Torvalds if (!journal) { 2682a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1256", 268345b03d5eSJeff Mahoney "unable to get memory for journal structure"); 26841da177e4SLinus Torvalds return 1; 26851da177e4SLinus Torvalds } 26861da177e4SLinus Torvalds INIT_LIST_HEAD(&journal->j_bitmap_nodes); 26871da177e4SLinus Torvalds INIT_LIST_HEAD(&journal->j_prealloc_list); 26881da177e4SLinus Torvalds INIT_LIST_HEAD(&journal->j_working_list); 26891da177e4SLinus Torvalds INIT_LIST_HEAD(&journal->j_journal_list); 26901da177e4SLinus Torvalds journal->j_persistent_trans = 0; 269137c69b98SFrederic Weisbecker if (reiserfs_allocate_list_bitmaps(sb, journal->j_list_bitmap, 269237c69b98SFrederic Weisbecker reiserfs_bmap_count(sb))) 26931da177e4SLinus Torvalds goto free_and_return; 269498ea3f50SFrederic Weisbecker 2695a9dd3643SJeff Mahoney allocate_bitmap_nodes(sb); 26961da177e4SLinus Torvalds 26971da177e4SLinus Torvalds /* reserved for journal area support */ 2698a9dd3643SJeff Mahoney SB_JOURNAL_1st_RESERVED_BLOCK(sb) = (old_format ? 2699bd4c625cSLinus Torvalds REISERFS_OLD_DISK_OFFSET_IN_BYTES 2700a9dd3643SJeff Mahoney / sb->s_blocksize + 2701a9dd3643SJeff Mahoney reiserfs_bmap_count(sb) + 2702bd4c625cSLinus Torvalds 1 : 2703bd4c625cSLinus Torvalds REISERFS_DISK_OFFSET_IN_BYTES / 2704a9dd3643SJeff Mahoney sb->s_blocksize + 2); 27051da177e4SLinus Torvalds 270625985edcSLucas De Marchi /* Sanity check to see is the standard journal fitting within first bitmap 27071da177e4SLinus Torvalds (actual for small blocksizes) */ 2708a9dd3643SJeff Mahoney if (!SB_ONDISK_JOURNAL_DEVICE(sb) && 2709a9dd3643SJeff Mahoney (SB_JOURNAL_1st_RESERVED_BLOCK(sb) + 2710a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb) > sb->s_blocksize * 8)) { 2711a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1393", 271245b03d5eSJeff Mahoney "journal does not fit for area addressed " 271345b03d5eSJeff Mahoney "by first of bitmap blocks. It starts at " 27141da177e4SLinus Torvalds "%u and its size is %u. Block size %ld", 2715a9dd3643SJeff Mahoney SB_JOURNAL_1st_RESERVED_BLOCK(sb), 2716a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb), 2717a9dd3643SJeff Mahoney sb->s_blocksize); 27181da177e4SLinus Torvalds goto free_and_return; 27191da177e4SLinus Torvalds } 27201da177e4SLinus Torvalds 2721a9dd3643SJeff Mahoney if (journal_init_dev(sb, journal, j_dev_name) != 0) { 2722a9dd3643SJeff Mahoney reiserfs_warning(sb, "sh-462", 272345b03d5eSJeff Mahoney "unable to initialize jornal device"); 27241da177e4SLinus Torvalds goto free_and_return; 27251da177e4SLinus Torvalds } 27261da177e4SLinus Torvalds 2727a9dd3643SJeff Mahoney rs = SB_DISK_SUPER_BLOCK(sb); 27281da177e4SLinus Torvalds 27291da177e4SLinus Torvalds /* read journal header */ 2730a9dd3643SJeff Mahoney bhjh = journal_bread(sb, 2731a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2732a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb)); 27331da177e4SLinus Torvalds if (!bhjh) { 2734a9dd3643SJeff Mahoney reiserfs_warning(sb, "sh-459", 273545b03d5eSJeff Mahoney "unable to read journal header"); 27361da177e4SLinus Torvalds goto free_and_return; 27371da177e4SLinus Torvalds } 27381da177e4SLinus Torvalds jh = (struct reiserfs_journal_header *)(bhjh->b_data); 27391da177e4SLinus Torvalds 27401da177e4SLinus Torvalds /* make sure that journal matches to the super block */ 2741bd4c625cSLinus Torvalds if (is_reiserfs_jr(rs) 2742bd4c625cSLinus Torvalds && (le32_to_cpu(jh->jh_journal.jp_journal_magic) != 2743bd4c625cSLinus Torvalds sb_jp_journal_magic(rs))) { 2744a9dd3643SJeff Mahoney reiserfs_warning(sb, "sh-460", 274545b03d5eSJeff Mahoney "journal header magic %x (device %s) does " 274645b03d5eSJeff Mahoney "not match to magic found in super block %x", 274745b03d5eSJeff Mahoney jh->jh_journal.jp_journal_magic, 27481da177e4SLinus Torvalds bdevname(journal->j_dev_bd, b), 27491da177e4SLinus Torvalds sb_jp_journal_magic(rs)); 27501da177e4SLinus Torvalds brelse(bhjh); 27511da177e4SLinus Torvalds goto free_and_return; 27521da177e4SLinus Torvalds } 27531da177e4SLinus Torvalds 27541da177e4SLinus Torvalds journal->j_trans_max = le32_to_cpu(jh->jh_journal.jp_journal_trans_max); 27551da177e4SLinus Torvalds journal->j_max_batch = le32_to_cpu(jh->jh_journal.jp_journal_max_batch); 2756bd4c625cSLinus Torvalds journal->j_max_commit_age = 2757bd4c625cSLinus Torvalds le32_to_cpu(jh->jh_journal.jp_journal_max_commit_age); 27581da177e4SLinus Torvalds journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; 27591da177e4SLinus Torvalds 2760a9dd3643SJeff Mahoney if (check_advise_trans_params(sb, journal) != 0) 2761cf3d0b81SEdward Shishkin goto free_and_return; 27621da177e4SLinus Torvalds journal->j_default_max_commit_age = journal->j_max_commit_age; 27631da177e4SLinus Torvalds 27641da177e4SLinus Torvalds if (commit_max_age != 0) { 27651da177e4SLinus Torvalds journal->j_max_commit_age = commit_max_age; 27661da177e4SLinus Torvalds journal->j_max_trans_age = commit_max_age; 27671da177e4SLinus Torvalds } 27681da177e4SLinus Torvalds 2769a9dd3643SJeff Mahoney reiserfs_info(sb, "journal params: device %s, size %u, " 27701da177e4SLinus Torvalds "journal first block %u, max trans len %u, max batch %u, " 27711da177e4SLinus Torvalds "max commit age %u, max trans age %u\n", 27721da177e4SLinus Torvalds bdevname(journal->j_dev_bd, b), 2773a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb), 2774a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb), 27751da177e4SLinus Torvalds journal->j_trans_max, 27761da177e4SLinus Torvalds journal->j_max_batch, 2777bd4c625cSLinus Torvalds journal->j_max_commit_age, journal->j_max_trans_age); 27781da177e4SLinus Torvalds 27791da177e4SLinus Torvalds brelse(bhjh); 27801da177e4SLinus Torvalds 27811da177e4SLinus Torvalds journal->j_list_bitmap_index = 0; 2782a9dd3643SJeff Mahoney journal_list_init(sb); 27831da177e4SLinus Torvalds 2784bd4c625cSLinus Torvalds memset(journal->j_list_hash_table, 0, 2785bd4c625cSLinus Torvalds JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)); 27861da177e4SLinus Torvalds 27871da177e4SLinus Torvalds INIT_LIST_HEAD(&journal->j_dirty_buffers); 27881da177e4SLinus Torvalds spin_lock_init(&journal->j_dirty_buffers_lock); 27891da177e4SLinus Torvalds 27901da177e4SLinus Torvalds journal->j_start = 0; 27911da177e4SLinus Torvalds journal->j_len = 0; 27921da177e4SLinus Torvalds journal->j_len_alloc = 0; 27931da177e4SLinus Torvalds atomic_set(&(journal->j_wcount), 0); 27941da177e4SLinus Torvalds atomic_set(&(journal->j_async_throttle), 0); 27951da177e4SLinus Torvalds journal->j_bcount = 0; 27961da177e4SLinus Torvalds journal->j_trans_start_time = 0; 27971da177e4SLinus Torvalds journal->j_last = NULL; 27981da177e4SLinus Torvalds journal->j_first = NULL; 27991da177e4SLinus Torvalds init_waitqueue_head(&(journal->j_join_wait)); 2800f68215c4SJeff Mahoney mutex_init(&journal->j_mutex); 2801afe70259SJeff Mahoney mutex_init(&journal->j_flush_mutex); 28021da177e4SLinus Torvalds 28031da177e4SLinus Torvalds journal->j_trans_id = 10; 28041da177e4SLinus Torvalds journal->j_mount_id = 10; 28051da177e4SLinus Torvalds journal->j_state = 0; 28061da177e4SLinus Torvalds atomic_set(&(journal->j_jlock), 0); 28071da177e4SLinus Torvalds journal->j_cnode_free_list = allocate_cnodes(num_cnodes); 28081da177e4SLinus Torvalds journal->j_cnode_free_orig = journal->j_cnode_free_list; 28091da177e4SLinus Torvalds journal->j_cnode_free = journal->j_cnode_free_list ? num_cnodes : 0; 28101da177e4SLinus Torvalds journal->j_cnode_used = 0; 28111da177e4SLinus Torvalds journal->j_must_wait = 0; 28121da177e4SLinus Torvalds 2813576f6d79SJeff Mahoney if (journal->j_cnode_free == 0) { 2814a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-2004", "Journal cnode memory " 2815576f6d79SJeff Mahoney "allocation failed (%ld bytes). Journal is " 2816576f6d79SJeff Mahoney "too large for available memory. Usually " 2817576f6d79SJeff Mahoney "this is due to a journal that is too large.", 2818576f6d79SJeff Mahoney sizeof (struct reiserfs_journal_cnode) * num_cnodes); 2819576f6d79SJeff Mahoney goto free_and_return; 2820576f6d79SJeff Mahoney } 2821576f6d79SJeff Mahoney 2822a9dd3643SJeff Mahoney init_journal_hash(sb); 28231da177e4SLinus Torvalds jl = journal->j_current_jl; 282437c69b98SFrederic Weisbecker 282537c69b98SFrederic Weisbecker /* 282637c69b98SFrederic Weisbecker * get_list_bitmap() may call flush_commit_list() which 282737c69b98SFrederic Weisbecker * requires the lock. Calling flush_commit_list() shouldn't happen 282837c69b98SFrederic Weisbecker * this early but I like to be paranoid. 282937c69b98SFrederic Weisbecker */ 283037c69b98SFrederic Weisbecker reiserfs_write_lock(sb); 2831a9dd3643SJeff Mahoney jl->j_list_bitmap = get_list_bitmap(sb, jl); 283237c69b98SFrederic Weisbecker reiserfs_write_unlock(sb); 28331da177e4SLinus Torvalds if (!jl->j_list_bitmap) { 2834a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-2005", 283545b03d5eSJeff Mahoney "get_list_bitmap failed for journal list 0"); 28361da177e4SLinus Torvalds goto free_and_return; 28371da177e4SLinus Torvalds } 283837c69b98SFrederic Weisbecker 283937c69b98SFrederic Weisbecker /* 284037c69b98SFrederic Weisbecker * Journal_read needs to be inspected in order to push down 284137c69b98SFrederic Weisbecker * the lock further inside (or even remove it). 284237c69b98SFrederic Weisbecker */ 284337c69b98SFrederic Weisbecker reiserfs_write_lock(sb); 284437c69b98SFrederic Weisbecker ret = journal_read(sb); 284537c69b98SFrederic Weisbecker reiserfs_write_unlock(sb); 284637c69b98SFrederic Weisbecker if (ret < 0) { 2847a9dd3643SJeff Mahoney reiserfs_warning(sb, "reiserfs-2006", 284845b03d5eSJeff Mahoney "Replay Failure, unable to mount"); 28491da177e4SLinus Torvalds goto free_and_return; 28501da177e4SLinus Torvalds } 28511da177e4SLinus Torvalds 28521da177e4SLinus Torvalds reiserfs_mounted_fs_count++; 285337c69b98SFrederic Weisbecker if (reiserfs_mounted_fs_count <= 1) 285428aadf51STejun Heo commit_wq = alloc_workqueue("reiserfs", WQ_MEM_RECLAIM, 0); 28551da177e4SLinus Torvalds 2856c4028958SDavid Howells INIT_DELAYED_WORK(&journal->j_work, flush_async_commits); 2857a9dd3643SJeff Mahoney journal->j_work_sb = sb; 28581da177e4SLinus Torvalds return 0; 28591da177e4SLinus Torvalds free_and_return: 2860a9dd3643SJeff Mahoney free_journal_ram(sb); 28611da177e4SLinus Torvalds return 1; 28621da177e4SLinus Torvalds } 28631da177e4SLinus Torvalds 28641da177e4SLinus Torvalds /* 28651da177e4SLinus Torvalds ** test for a polite end of the current transaction. Used by file_write, and should 28661da177e4SLinus Torvalds ** be used by delete to make sure they don't write more than can fit inside a single 28671da177e4SLinus Torvalds ** transaction 28681da177e4SLinus Torvalds */ 2869bd4c625cSLinus Torvalds int journal_transaction_should_end(struct reiserfs_transaction_handle *th, 2870bd4c625cSLinus Torvalds int new_alloc) 2871bd4c625cSLinus Torvalds { 28721da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(th->t_super); 28731da177e4SLinus Torvalds time_t now = get_seconds(); 28741da177e4SLinus Torvalds /* cannot restart while nested */ 28751da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 28761da177e4SLinus Torvalds if (th->t_refcount > 1) 28771da177e4SLinus Torvalds return 0; 28781da177e4SLinus Torvalds if (journal->j_must_wait > 0 || 28791da177e4SLinus Torvalds (journal->j_len_alloc + new_alloc) >= journal->j_max_batch || 28801da177e4SLinus Torvalds atomic_read(&(journal->j_jlock)) || 28811da177e4SLinus Torvalds (now - journal->j_trans_start_time) > journal->j_max_trans_age || 28821da177e4SLinus Torvalds journal->j_cnode_free < (journal->j_trans_max * 3)) { 28831da177e4SLinus Torvalds return 1; 28841da177e4SLinus Torvalds } 2885b18c1c6eSDavidlohr Bueso 28866ae1ea44SChris Mason journal->j_len_alloc += new_alloc; 28876ae1ea44SChris Mason th->t_blocks_allocated += new_alloc ; 28881da177e4SLinus Torvalds return 0; 28891da177e4SLinus Torvalds } 28901da177e4SLinus Torvalds 2891b18c1c6eSDavidlohr Bueso /* this must be called inside a transaction 28921da177e4SLinus Torvalds */ 2893bd4c625cSLinus Torvalds void reiserfs_block_writes(struct reiserfs_transaction_handle *th) 2894bd4c625cSLinus Torvalds { 28951da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(th->t_super); 28961da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 28971da177e4SLinus Torvalds journal->j_must_wait = 1; 28981da177e4SLinus Torvalds set_bit(J_WRITERS_BLOCKED, &journal->j_state); 28991da177e4SLinus Torvalds return; 29001da177e4SLinus Torvalds } 29011da177e4SLinus Torvalds 2902b18c1c6eSDavidlohr Bueso /* this must be called without a transaction started 29031da177e4SLinus Torvalds */ 2904bd4c625cSLinus Torvalds void reiserfs_allow_writes(struct super_block *s) 2905bd4c625cSLinus Torvalds { 29061da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 29071da177e4SLinus Torvalds clear_bit(J_WRITERS_BLOCKED, &journal->j_state); 29081da177e4SLinus Torvalds wake_up(&journal->j_join_wait); 29091da177e4SLinus Torvalds } 29101da177e4SLinus Torvalds 2911b18c1c6eSDavidlohr Bueso /* this must be called without a transaction started 29121da177e4SLinus Torvalds */ 2913bd4c625cSLinus Torvalds void reiserfs_wait_on_write_block(struct super_block *s) 2914bd4c625cSLinus Torvalds { 29151da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 29161da177e4SLinus Torvalds wait_event(journal->j_join_wait, 29171da177e4SLinus Torvalds !test_bit(J_WRITERS_BLOCKED, &journal->j_state)); 29181da177e4SLinus Torvalds } 29191da177e4SLinus Torvalds 2920bd4c625cSLinus Torvalds static void queue_log_writer(struct super_block *s) 2921bd4c625cSLinus Torvalds { 29221da177e4SLinus Torvalds wait_queue_t wait; 29231da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 29241da177e4SLinus Torvalds set_bit(J_WRITERS_QUEUED, &journal->j_state); 29251da177e4SLinus Torvalds 29261da177e4SLinus Torvalds /* 29271da177e4SLinus Torvalds * we don't want to use wait_event here because 29281da177e4SLinus Torvalds * we only want to wait once. 29291da177e4SLinus Torvalds */ 29301da177e4SLinus Torvalds init_waitqueue_entry(&wait, current); 29311da177e4SLinus Torvalds add_wait_queue(&journal->j_join_wait, &wait); 29321da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 29338ebc4232SFrederic Weisbecker if (test_bit(J_WRITERS_QUEUED, &journal->j_state)) { 29348ebc4232SFrederic Weisbecker reiserfs_write_unlock(s); 29351da177e4SLinus Torvalds schedule(); 29368ebc4232SFrederic Weisbecker reiserfs_write_lock(s); 29378ebc4232SFrederic Weisbecker } 29385ab2f7e0SMilind Arun Choudhary __set_current_state(TASK_RUNNING); 29391da177e4SLinus Torvalds remove_wait_queue(&journal->j_join_wait, &wait); 29401da177e4SLinus Torvalds } 29411da177e4SLinus Torvalds 2942bd4c625cSLinus Torvalds static void wake_queued_writers(struct super_block *s) 2943bd4c625cSLinus Torvalds { 29441da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 29451da177e4SLinus Torvalds if (test_and_clear_bit(J_WRITERS_QUEUED, &journal->j_state)) 29461da177e4SLinus Torvalds wake_up(&journal->j_join_wait); 29471da177e4SLinus Torvalds } 29481da177e4SLinus Torvalds 2949600ed416SJeff Mahoney static void let_transaction_grow(struct super_block *sb, unsigned int trans_id) 29501da177e4SLinus Torvalds { 29511da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(sb); 29521da177e4SLinus Torvalds unsigned long bcount = journal->j_bcount; 29531da177e4SLinus Torvalds while (1) { 29548ebc4232SFrederic Weisbecker reiserfs_write_unlock(sb); 2955041e0e3bSNishanth Aravamudan schedule_timeout_uninterruptible(1); 29568ebc4232SFrederic Weisbecker reiserfs_write_lock(sb); 29571da177e4SLinus Torvalds journal->j_current_jl->j_state |= LIST_COMMIT_PENDING; 29581da177e4SLinus Torvalds while ((atomic_read(&journal->j_wcount) > 0 || 29591da177e4SLinus Torvalds atomic_read(&journal->j_jlock)) && 29601da177e4SLinus Torvalds journal->j_trans_id == trans_id) { 29611da177e4SLinus Torvalds queue_log_writer(sb); 29621da177e4SLinus Torvalds } 29631da177e4SLinus Torvalds if (journal->j_trans_id != trans_id) 29641da177e4SLinus Torvalds break; 29651da177e4SLinus Torvalds if (bcount == journal->j_bcount) 29661da177e4SLinus Torvalds break; 29671da177e4SLinus Torvalds bcount = journal->j_bcount; 29681da177e4SLinus Torvalds } 29691da177e4SLinus Torvalds } 29701da177e4SLinus Torvalds 29711da177e4SLinus Torvalds /* join == true if you must join an existing transaction. 29721da177e4SLinus Torvalds ** join == false if you can deal with waiting for others to finish 29731da177e4SLinus Torvalds ** 29741da177e4SLinus Torvalds ** this will block until the transaction is joinable. send the number of blocks you 29751da177e4SLinus Torvalds ** expect to use in nblocks. 29761da177e4SLinus Torvalds */ 2977bd4c625cSLinus Torvalds static int do_journal_begin_r(struct reiserfs_transaction_handle *th, 2978a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks, 2979bd4c625cSLinus Torvalds int join) 2980bd4c625cSLinus Torvalds { 29811da177e4SLinus Torvalds time_t now = get_seconds(); 2982600ed416SJeff Mahoney unsigned int old_trans_id; 2983a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 29841da177e4SLinus Torvalds struct reiserfs_transaction_handle myth; 29851da177e4SLinus Torvalds int sched_count = 0; 29861da177e4SLinus Torvalds int retval; 29871da177e4SLinus Torvalds 2988a9dd3643SJeff Mahoney reiserfs_check_lock_depth(sb, "journal_begin"); 298914a61442SEric Sesterhenn BUG_ON(nblocks > journal->j_trans_max); 29901da177e4SLinus Torvalds 2991a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.journal_being); 29921da177e4SLinus Torvalds /* set here for journal_join */ 29931da177e4SLinus Torvalds th->t_refcount = 1; 2994a9dd3643SJeff Mahoney th->t_super = sb; 29951da177e4SLinus Torvalds 29961da177e4SLinus Torvalds relock: 2997a9dd3643SJeff Mahoney lock_journal(sb); 29981da177e4SLinus Torvalds if (join != JBEGIN_ABORT && reiserfs_is_journal_aborted(journal)) { 2999a9dd3643SJeff Mahoney unlock_journal(sb); 30001da177e4SLinus Torvalds retval = journal->j_errno; 30011da177e4SLinus Torvalds goto out_fail; 30021da177e4SLinus Torvalds } 30031da177e4SLinus Torvalds journal->j_bcount++; 30041da177e4SLinus Torvalds 30051da177e4SLinus Torvalds if (test_bit(J_WRITERS_BLOCKED, &journal->j_state)) { 3006a9dd3643SJeff Mahoney unlock_journal(sb); 30078ebc4232SFrederic Weisbecker reiserfs_write_unlock(sb); 3008a9dd3643SJeff Mahoney reiserfs_wait_on_write_block(sb); 30098ebc4232SFrederic Weisbecker reiserfs_write_lock(sb); 3010a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.journal_relock_writers); 30111da177e4SLinus Torvalds goto relock; 30121da177e4SLinus Torvalds } 30131da177e4SLinus Torvalds now = get_seconds(); 30141da177e4SLinus Torvalds 30151da177e4SLinus Torvalds /* if there is no room in the journal OR 30161da177e4SLinus Torvalds ** if this transaction is too old, and we weren't called joinable, wait for it to finish before beginning 30171da177e4SLinus Torvalds ** we don't sleep if there aren't other writers 30181da177e4SLinus Torvalds */ 30191da177e4SLinus Torvalds 30201da177e4SLinus Torvalds if ((!join && journal->j_must_wait > 0) || 3021bd4c625cSLinus Torvalds (!join 3022bd4c625cSLinus Torvalds && (journal->j_len_alloc + nblocks + 2) >= journal->j_max_batch) 3023bd4c625cSLinus Torvalds || (!join && atomic_read(&journal->j_wcount) > 0 3024bd4c625cSLinus Torvalds && journal->j_trans_start_time > 0 3025bd4c625cSLinus Torvalds && (now - journal->j_trans_start_time) > 3026bd4c625cSLinus Torvalds journal->j_max_trans_age) || (!join 3027bd4c625cSLinus Torvalds && atomic_read(&journal->j_jlock)) 3028bd4c625cSLinus Torvalds || (!join && journal->j_cnode_free < (journal->j_trans_max * 3))) { 30291da177e4SLinus Torvalds 30301da177e4SLinus Torvalds old_trans_id = journal->j_trans_id; 3031a9dd3643SJeff Mahoney unlock_journal(sb); /* allow others to finish this transaction */ 30321da177e4SLinus Torvalds 30331da177e4SLinus Torvalds if (!join && (journal->j_len_alloc + nblocks + 2) >= 30341da177e4SLinus Torvalds journal->j_max_batch && 3035bd4c625cSLinus Torvalds ((journal->j_len + nblocks + 2) * 100) < 3036bd4c625cSLinus Torvalds (journal->j_len_alloc * 75)) { 30371da177e4SLinus Torvalds if (atomic_read(&journal->j_wcount) > 10) { 30381da177e4SLinus Torvalds sched_count++; 3039a9dd3643SJeff Mahoney queue_log_writer(sb); 30401da177e4SLinus Torvalds goto relock; 30411da177e4SLinus Torvalds } 30421da177e4SLinus Torvalds } 30431da177e4SLinus Torvalds /* don't mess with joining the transaction if all we have to do is 30441da177e4SLinus Torvalds * wait for someone else to do a commit 30451da177e4SLinus Torvalds */ 30461da177e4SLinus Torvalds if (atomic_read(&journal->j_jlock)) { 30471da177e4SLinus Torvalds while (journal->j_trans_id == old_trans_id && 30481da177e4SLinus Torvalds atomic_read(&journal->j_jlock)) { 3049a9dd3643SJeff Mahoney queue_log_writer(sb); 30501da177e4SLinus Torvalds } 30511da177e4SLinus Torvalds goto relock; 30521da177e4SLinus Torvalds } 3053a9dd3643SJeff Mahoney retval = journal_join(&myth, sb, 1); 30541da177e4SLinus Torvalds if (retval) 30551da177e4SLinus Torvalds goto out_fail; 30561da177e4SLinus Torvalds 30571da177e4SLinus Torvalds /* someone might have ended the transaction while we joined */ 30581da177e4SLinus Torvalds if (old_trans_id != journal->j_trans_id) { 3059a9dd3643SJeff Mahoney retval = do_journal_end(&myth, sb, 1, 0); 30601da177e4SLinus Torvalds } else { 3061a9dd3643SJeff Mahoney retval = do_journal_end(&myth, sb, 1, COMMIT_NOW); 30621da177e4SLinus Torvalds } 30631da177e4SLinus Torvalds 30641da177e4SLinus Torvalds if (retval) 30651da177e4SLinus Torvalds goto out_fail; 30661da177e4SLinus Torvalds 3067a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.journal_relock_wcount); 30681da177e4SLinus Torvalds goto relock; 30691da177e4SLinus Torvalds } 30701da177e4SLinus Torvalds /* we are the first writer, set trans_id */ 30711da177e4SLinus Torvalds if (journal->j_trans_start_time == 0) { 30721da177e4SLinus Torvalds journal->j_trans_start_time = get_seconds(); 30731da177e4SLinus Torvalds } 30741da177e4SLinus Torvalds atomic_inc(&(journal->j_wcount)); 30751da177e4SLinus Torvalds journal->j_len_alloc += nblocks; 30761da177e4SLinus Torvalds th->t_blocks_logged = 0; 30771da177e4SLinus Torvalds th->t_blocks_allocated = nblocks; 30781da177e4SLinus Torvalds th->t_trans_id = journal->j_trans_id; 3079a9dd3643SJeff Mahoney unlock_journal(sb); 30801da177e4SLinus Torvalds INIT_LIST_HEAD(&th->t_list); 30811da177e4SLinus Torvalds return 0; 30821da177e4SLinus Torvalds 30831da177e4SLinus Torvalds out_fail: 30841da177e4SLinus Torvalds memset(th, 0, sizeof(*th)); 30851da177e4SLinus Torvalds /* Re-set th->t_super, so we can properly keep track of how many 30861da177e4SLinus Torvalds * persistent transactions there are. We need to do this so if this 30871da177e4SLinus Torvalds * call is part of a failed restart_transaction, we can free it later */ 3088a9dd3643SJeff Mahoney th->t_super = sb; 30891da177e4SLinus Torvalds return retval; 30901da177e4SLinus Torvalds } 30911da177e4SLinus Torvalds 3092bd4c625cSLinus Torvalds struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct 3093bd4c625cSLinus Torvalds super_block 3094bd4c625cSLinus Torvalds *s, 3095bd4c625cSLinus Torvalds int nblocks) 3096bd4c625cSLinus Torvalds { 30971da177e4SLinus Torvalds int ret; 30981da177e4SLinus Torvalds struct reiserfs_transaction_handle *th; 30991da177e4SLinus Torvalds 31001da177e4SLinus Torvalds /* if we're nesting into an existing transaction. It will be 31011da177e4SLinus Torvalds ** persistent on its own 31021da177e4SLinus Torvalds */ 31031da177e4SLinus Torvalds if (reiserfs_transaction_running(s)) { 31041da177e4SLinus Torvalds th = current->journal_info; 31051da177e4SLinus Torvalds th->t_refcount++; 310614a61442SEric Sesterhenn BUG_ON(th->t_refcount < 2); 310714a61442SEric Sesterhenn 31081da177e4SLinus Torvalds return th; 31091da177e4SLinus Torvalds } 3110d739b42bSPekka Enberg th = kmalloc(sizeof(struct reiserfs_transaction_handle), GFP_NOFS); 31111da177e4SLinus Torvalds if (!th) 31121da177e4SLinus Torvalds return NULL; 31131da177e4SLinus Torvalds ret = journal_begin(th, s, nblocks); 31141da177e4SLinus Torvalds if (ret) { 3115d739b42bSPekka Enberg kfree(th); 31161da177e4SLinus Torvalds return NULL; 31171da177e4SLinus Torvalds } 31181da177e4SLinus Torvalds 31191da177e4SLinus Torvalds SB_JOURNAL(s)->j_persistent_trans++; 31201da177e4SLinus Torvalds return th; 31211da177e4SLinus Torvalds } 31221da177e4SLinus Torvalds 3123bd4c625cSLinus Torvalds int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *th) 3124bd4c625cSLinus Torvalds { 31251da177e4SLinus Torvalds struct super_block *s = th->t_super; 31261da177e4SLinus Torvalds int ret = 0; 31271da177e4SLinus Torvalds if (th->t_trans_id) 31281da177e4SLinus Torvalds ret = journal_end(th, th->t_super, th->t_blocks_allocated); 31291da177e4SLinus Torvalds else 31301da177e4SLinus Torvalds ret = -EIO; 31311da177e4SLinus Torvalds if (th->t_refcount == 0) { 31321da177e4SLinus Torvalds SB_JOURNAL(s)->j_persistent_trans--; 3133d739b42bSPekka Enberg kfree(th); 31341da177e4SLinus Torvalds } 31351da177e4SLinus Torvalds return ret; 31361da177e4SLinus Torvalds } 31371da177e4SLinus Torvalds 3138bd4c625cSLinus Torvalds static int journal_join(struct reiserfs_transaction_handle *th, 3139a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks) 3140bd4c625cSLinus Torvalds { 31411da177e4SLinus Torvalds struct reiserfs_transaction_handle *cur_th = current->journal_info; 31421da177e4SLinus Torvalds 31431da177e4SLinus Torvalds /* this keeps do_journal_end from NULLing out the current->journal_info 31441da177e4SLinus Torvalds ** pointer 31451da177e4SLinus Torvalds */ 31461da177e4SLinus Torvalds th->t_handle_save = cur_th; 314714a61442SEric Sesterhenn BUG_ON(cur_th && cur_th->t_refcount > 1); 3148a9dd3643SJeff Mahoney return do_journal_begin_r(th, sb, nblocks, JBEGIN_JOIN); 31491da177e4SLinus Torvalds } 31501da177e4SLinus Torvalds 3151bd4c625cSLinus Torvalds int journal_join_abort(struct reiserfs_transaction_handle *th, 3152a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks) 3153bd4c625cSLinus Torvalds { 31541da177e4SLinus Torvalds struct reiserfs_transaction_handle *cur_th = current->journal_info; 31551da177e4SLinus Torvalds 31561da177e4SLinus Torvalds /* this keeps do_journal_end from NULLing out the current->journal_info 31571da177e4SLinus Torvalds ** pointer 31581da177e4SLinus Torvalds */ 31591da177e4SLinus Torvalds th->t_handle_save = cur_th; 316014a61442SEric Sesterhenn BUG_ON(cur_th && cur_th->t_refcount > 1); 3161a9dd3643SJeff Mahoney return do_journal_begin_r(th, sb, nblocks, JBEGIN_ABORT); 31621da177e4SLinus Torvalds } 31631da177e4SLinus Torvalds 3164bd4c625cSLinus Torvalds int journal_begin(struct reiserfs_transaction_handle *th, 3165a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks) 3166bd4c625cSLinus Torvalds { 31671da177e4SLinus Torvalds struct reiserfs_transaction_handle *cur_th = current->journal_info; 31681da177e4SLinus Torvalds int ret; 31691da177e4SLinus Torvalds 31701da177e4SLinus Torvalds th->t_handle_save = NULL; 31711da177e4SLinus Torvalds if (cur_th) { 31721da177e4SLinus Torvalds /* we are nesting into the current transaction */ 3173a9dd3643SJeff Mahoney if (cur_th->t_super == sb) { 31741da177e4SLinus Torvalds BUG_ON(!cur_th->t_refcount); 31751da177e4SLinus Torvalds cur_th->t_refcount++; 31761da177e4SLinus Torvalds memcpy(th, cur_th, sizeof(*th)); 31771da177e4SLinus Torvalds if (th->t_refcount <= 1) 3178a9dd3643SJeff Mahoney reiserfs_warning(sb, "reiserfs-2005", 317945b03d5eSJeff Mahoney "BAD: refcount <= 1, but " 318045b03d5eSJeff Mahoney "journal_info != 0"); 31811da177e4SLinus Torvalds return 0; 31821da177e4SLinus Torvalds } else { 31831da177e4SLinus Torvalds /* we've ended up with a handle from a different filesystem. 31841da177e4SLinus Torvalds ** save it and restore on journal_end. This should never 31851da177e4SLinus Torvalds ** really happen... 31861da177e4SLinus Torvalds */ 3187a9dd3643SJeff Mahoney reiserfs_warning(sb, "clm-2100", 318845b03d5eSJeff Mahoney "nesting info a different FS"); 31891da177e4SLinus Torvalds th->t_handle_save = current->journal_info; 31901da177e4SLinus Torvalds current->journal_info = th; 31911da177e4SLinus Torvalds } 31921da177e4SLinus Torvalds } else { 31931da177e4SLinus Torvalds current->journal_info = th; 31941da177e4SLinus Torvalds } 3195a9dd3643SJeff Mahoney ret = do_journal_begin_r(th, sb, nblocks, JBEGIN_REG); 319614a61442SEric Sesterhenn BUG_ON(current->journal_info != th); 31971da177e4SLinus Torvalds 31981da177e4SLinus Torvalds /* I guess this boils down to being the reciprocal of clm-2100 above. 31991da177e4SLinus Torvalds * If do_journal_begin_r fails, we need to put it back, since journal_end 32001da177e4SLinus Torvalds * won't be called to do it. */ 32011da177e4SLinus Torvalds if (ret) 32021da177e4SLinus Torvalds current->journal_info = th->t_handle_save; 32031da177e4SLinus Torvalds else 32041da177e4SLinus Torvalds BUG_ON(!th->t_refcount); 32051da177e4SLinus Torvalds 32061da177e4SLinus Torvalds return ret; 32071da177e4SLinus Torvalds } 32081da177e4SLinus Torvalds 32091da177e4SLinus Torvalds /* 32101da177e4SLinus Torvalds ** puts bh into the current transaction. If it was already there, reorders removes the 32111da177e4SLinus Torvalds ** old pointers from the hash, and puts new ones in (to make sure replay happen in the right order). 32121da177e4SLinus Torvalds ** 32131da177e4SLinus Torvalds ** if it was dirty, cleans and files onto the clean list. I can't let it be dirty again until the 32141da177e4SLinus Torvalds ** transaction is committed. 32151da177e4SLinus Torvalds ** 32161da177e4SLinus Torvalds ** if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len. 32171da177e4SLinus Torvalds */ 3218bd4c625cSLinus Torvalds int journal_mark_dirty(struct reiserfs_transaction_handle *th, 3219a9dd3643SJeff Mahoney struct super_block *sb, struct buffer_head *bh) 3220bd4c625cSLinus Torvalds { 3221a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 32221da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn = NULL; 32231da177e4SLinus Torvalds int count_already_incd = 0; 32241da177e4SLinus Torvalds int prepared = 0; 32251da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 32261da177e4SLinus Torvalds 3227a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.mark_dirty); 32281da177e4SLinus Torvalds if (th->t_trans_id != journal->j_trans_id) { 3229c3a9c210SJeff Mahoney reiserfs_panic(th->t_super, "journal-1577", 3230c3a9c210SJeff Mahoney "handle trans id %ld != current trans id %ld", 32311da177e4SLinus Torvalds th->t_trans_id, journal->j_trans_id); 32321da177e4SLinus Torvalds } 32331da177e4SLinus Torvalds 3234a9dd3643SJeff Mahoney sb->s_dirt = 1; 32351da177e4SLinus Torvalds 32361da177e4SLinus Torvalds prepared = test_clear_buffer_journal_prepared(bh); 32371da177e4SLinus Torvalds clear_buffer_journal_restore_dirty(bh); 32381da177e4SLinus Torvalds /* already in this transaction, we are done */ 32391da177e4SLinus Torvalds if (buffer_journaled(bh)) { 3240a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.mark_dirty_already); 32411da177e4SLinus Torvalds return 0; 32421da177e4SLinus Torvalds } 32431da177e4SLinus Torvalds 32441da177e4SLinus Torvalds /* this must be turned into a panic instead of a warning. We can't allow 32451da177e4SLinus Torvalds ** a dirty or journal_dirty or locked buffer to be logged, as some changes 32461da177e4SLinus Torvalds ** could get to disk too early. NOT GOOD. 32471da177e4SLinus Torvalds */ 32481da177e4SLinus Torvalds if (!prepared || buffer_dirty(bh)) { 3249a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1777", 325045b03d5eSJeff Mahoney "buffer %llu bad state " 32511da177e4SLinus Torvalds "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT", 3252bd4c625cSLinus Torvalds (unsigned long long)bh->b_blocknr, 3253bd4c625cSLinus Torvalds prepared ? ' ' : '!', 32541da177e4SLinus Torvalds buffer_locked(bh) ? ' ' : '!', 32551da177e4SLinus Torvalds buffer_dirty(bh) ? ' ' : '!', 32561da177e4SLinus Torvalds buffer_journal_dirty(bh) ? ' ' : '!'); 32571da177e4SLinus Torvalds } 32581da177e4SLinus Torvalds 32591da177e4SLinus Torvalds if (atomic_read(&(journal->j_wcount)) <= 0) { 3260a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1409", 326145b03d5eSJeff Mahoney "returning because j_wcount was %d", 3262bd4c625cSLinus Torvalds atomic_read(&(journal->j_wcount))); 32631da177e4SLinus Torvalds return 1; 32641da177e4SLinus Torvalds } 32651da177e4SLinus Torvalds /* this error means I've screwed up, and we've overflowed the transaction. 32661da177e4SLinus Torvalds ** Nothing can be done here, except make the FS readonly or panic. 32671da177e4SLinus Torvalds */ 32681da177e4SLinus Torvalds if (journal->j_len >= journal->j_trans_max) { 3269c3a9c210SJeff Mahoney reiserfs_panic(th->t_super, "journal-1413", 3270c3a9c210SJeff Mahoney "j_len (%lu) is too big", 3271bd4c625cSLinus Torvalds journal->j_len); 32721da177e4SLinus Torvalds } 32731da177e4SLinus Torvalds 32741da177e4SLinus Torvalds if (buffer_journal_dirty(bh)) { 32751da177e4SLinus Torvalds count_already_incd = 1; 3276a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.mark_dirty_notjournal); 32771da177e4SLinus Torvalds clear_buffer_journal_dirty(bh); 32781da177e4SLinus Torvalds } 32791da177e4SLinus Torvalds 32801da177e4SLinus Torvalds if (journal->j_len > journal->j_len_alloc) { 32811da177e4SLinus Torvalds journal->j_len_alloc = journal->j_len + JOURNAL_PER_BALANCE_CNT; 32821da177e4SLinus Torvalds } 32831da177e4SLinus Torvalds 32841da177e4SLinus Torvalds set_buffer_journaled(bh); 32851da177e4SLinus Torvalds 32861da177e4SLinus Torvalds /* now put this guy on the end */ 32871da177e4SLinus Torvalds if (!cn) { 3288a9dd3643SJeff Mahoney cn = get_cnode(sb); 32891da177e4SLinus Torvalds if (!cn) { 3290a9dd3643SJeff Mahoney reiserfs_panic(sb, "journal-4", "get_cnode failed!"); 32911da177e4SLinus Torvalds } 32921da177e4SLinus Torvalds 32931da177e4SLinus Torvalds if (th->t_blocks_logged == th->t_blocks_allocated) { 32941da177e4SLinus Torvalds th->t_blocks_allocated += JOURNAL_PER_BALANCE_CNT; 32951da177e4SLinus Torvalds journal->j_len_alloc += JOURNAL_PER_BALANCE_CNT; 32961da177e4SLinus Torvalds } 32971da177e4SLinus Torvalds th->t_blocks_logged++; 32981da177e4SLinus Torvalds journal->j_len++; 32991da177e4SLinus Torvalds 33001da177e4SLinus Torvalds cn->bh = bh; 33011da177e4SLinus Torvalds cn->blocknr = bh->b_blocknr; 3302a9dd3643SJeff Mahoney cn->sb = sb; 33031da177e4SLinus Torvalds cn->jlist = NULL; 33041da177e4SLinus Torvalds insert_journal_hash(journal->j_hash_table, cn); 33051da177e4SLinus Torvalds if (!count_already_incd) { 33061da177e4SLinus Torvalds get_bh(bh); 33071da177e4SLinus Torvalds } 33081da177e4SLinus Torvalds } 33091da177e4SLinus Torvalds cn->next = NULL; 33101da177e4SLinus Torvalds cn->prev = journal->j_last; 33111da177e4SLinus Torvalds cn->bh = bh; 33121da177e4SLinus Torvalds if (journal->j_last) { 33131da177e4SLinus Torvalds journal->j_last->next = cn; 33141da177e4SLinus Torvalds journal->j_last = cn; 33151da177e4SLinus Torvalds } else { 33161da177e4SLinus Torvalds journal->j_first = cn; 33171da177e4SLinus Torvalds journal->j_last = cn; 33181da177e4SLinus Torvalds } 33191da177e4SLinus Torvalds return 0; 33201da177e4SLinus Torvalds } 33211da177e4SLinus Torvalds 3322bd4c625cSLinus Torvalds int journal_end(struct reiserfs_transaction_handle *th, 3323a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks) 3324bd4c625cSLinus Torvalds { 33251da177e4SLinus Torvalds if (!current->journal_info && th->t_refcount > 1) 3326a9dd3643SJeff Mahoney reiserfs_warning(sb, "REISER-NESTING", 332745b03d5eSJeff Mahoney "th NULL, refcount %d", th->t_refcount); 33281da177e4SLinus Torvalds 33291da177e4SLinus Torvalds if (!th->t_trans_id) { 33301da177e4SLinus Torvalds WARN_ON(1); 33311da177e4SLinus Torvalds return -EIO; 33321da177e4SLinus Torvalds } 33331da177e4SLinus Torvalds 33341da177e4SLinus Torvalds th->t_refcount--; 33351da177e4SLinus Torvalds if (th->t_refcount > 0) { 3336bd4c625cSLinus Torvalds struct reiserfs_transaction_handle *cur_th = 3337bd4c625cSLinus Torvalds current->journal_info; 33381da177e4SLinus Torvalds 33391da177e4SLinus Torvalds /* we aren't allowed to close a nested transaction on a different 33401da177e4SLinus Torvalds ** filesystem from the one in the task struct 33411da177e4SLinus Torvalds */ 334214a61442SEric Sesterhenn BUG_ON(cur_th->t_super != th->t_super); 33431da177e4SLinus Torvalds 33441da177e4SLinus Torvalds if (th != cur_th) { 33451da177e4SLinus Torvalds memcpy(current->journal_info, th, sizeof(*th)); 33461da177e4SLinus Torvalds th->t_trans_id = 0; 33471da177e4SLinus Torvalds } 33481da177e4SLinus Torvalds return 0; 33491da177e4SLinus Torvalds } else { 3350a9dd3643SJeff Mahoney return do_journal_end(th, sb, nblocks, 0); 33511da177e4SLinus Torvalds } 33521da177e4SLinus Torvalds } 33531da177e4SLinus Torvalds 33541da177e4SLinus Torvalds /* removes from the current transaction, relsing and descrementing any counters. 33551da177e4SLinus Torvalds ** also files the removed buffer directly onto the clean list 33561da177e4SLinus Torvalds ** 33571da177e4SLinus Torvalds ** called by journal_mark_freed when a block has been deleted 33581da177e4SLinus Torvalds ** 33591da177e4SLinus Torvalds ** returns 1 if it cleaned and relsed the buffer. 0 otherwise 33601da177e4SLinus Torvalds */ 3361a9dd3643SJeff Mahoney static int remove_from_transaction(struct super_block *sb, 3362bd4c625cSLinus Torvalds b_blocknr_t blocknr, int already_cleaned) 3363bd4c625cSLinus Torvalds { 33641da177e4SLinus Torvalds struct buffer_head *bh; 33651da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 3366a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 33671da177e4SLinus Torvalds int ret = 0; 33681da177e4SLinus Torvalds 3369a9dd3643SJeff Mahoney cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr); 33701da177e4SLinus Torvalds if (!cn || !cn->bh) { 33711da177e4SLinus Torvalds return ret; 33721da177e4SLinus Torvalds } 33731da177e4SLinus Torvalds bh = cn->bh; 33741da177e4SLinus Torvalds if (cn->prev) { 33751da177e4SLinus Torvalds cn->prev->next = cn->next; 33761da177e4SLinus Torvalds } 33771da177e4SLinus Torvalds if (cn->next) { 33781da177e4SLinus Torvalds cn->next->prev = cn->prev; 33791da177e4SLinus Torvalds } 33801da177e4SLinus Torvalds if (cn == journal->j_first) { 33811da177e4SLinus Torvalds journal->j_first = cn->next; 33821da177e4SLinus Torvalds } 33831da177e4SLinus Torvalds if (cn == journal->j_last) { 33841da177e4SLinus Torvalds journal->j_last = cn->prev; 33851da177e4SLinus Torvalds } 33861da177e4SLinus Torvalds if (bh) 3387a9dd3643SJeff Mahoney remove_journal_hash(sb, journal->j_hash_table, NULL, 3388bd4c625cSLinus Torvalds bh->b_blocknr, 0); 33891da177e4SLinus Torvalds clear_buffer_journaled(bh); /* don't log this one */ 33901da177e4SLinus Torvalds 33911da177e4SLinus Torvalds if (!already_cleaned) { 33921da177e4SLinus Torvalds clear_buffer_journal_dirty(bh); 33931da177e4SLinus Torvalds clear_buffer_dirty(bh); 33941da177e4SLinus Torvalds clear_buffer_journal_test(bh); 33951da177e4SLinus Torvalds put_bh(bh); 33961da177e4SLinus Torvalds if (atomic_read(&(bh->b_count)) < 0) { 3397a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1752", 339845b03d5eSJeff Mahoney "b_count < 0"); 33991da177e4SLinus Torvalds } 34001da177e4SLinus Torvalds ret = 1; 34011da177e4SLinus Torvalds } 34021da177e4SLinus Torvalds journal->j_len--; 34031da177e4SLinus Torvalds journal->j_len_alloc--; 3404a9dd3643SJeff Mahoney free_cnode(sb, cn); 34051da177e4SLinus Torvalds return ret; 34061da177e4SLinus Torvalds } 34071da177e4SLinus Torvalds 34081da177e4SLinus Torvalds /* 34091da177e4SLinus Torvalds ** for any cnode in a journal list, it can only be dirtied of all the 34100779bf2dSMatt LaPlante ** transactions that include it are committed to disk. 34111da177e4SLinus Torvalds ** this checks through each transaction, and returns 1 if you are allowed to dirty, 34121da177e4SLinus Torvalds ** and 0 if you aren't 34131da177e4SLinus Torvalds ** 34141da177e4SLinus Torvalds ** it is called by dirty_journal_list, which is called after flush_commit_list has gotten all the log 34151da177e4SLinus Torvalds ** blocks for a given transaction on disk 34161da177e4SLinus Torvalds ** 34171da177e4SLinus Torvalds */ 3418bd4c625cSLinus Torvalds static int can_dirty(struct reiserfs_journal_cnode *cn) 3419bd4c625cSLinus Torvalds { 34201da177e4SLinus Torvalds struct super_block *sb = cn->sb; 34211da177e4SLinus Torvalds b_blocknr_t blocknr = cn->blocknr; 34221da177e4SLinus Torvalds struct reiserfs_journal_cnode *cur = cn->hprev; 34231da177e4SLinus Torvalds int can_dirty = 1; 34241da177e4SLinus Torvalds 34251da177e4SLinus Torvalds /* first test hprev. These are all newer than cn, so any node here 34261da177e4SLinus Torvalds ** with the same block number and dev means this node can't be sent 34271da177e4SLinus Torvalds ** to disk right now. 34281da177e4SLinus Torvalds */ 34291da177e4SLinus Torvalds while (cur && can_dirty) { 34301da177e4SLinus Torvalds if (cur->jlist && cur->bh && cur->blocknr && cur->sb == sb && 34311da177e4SLinus Torvalds cur->blocknr == blocknr) { 34321da177e4SLinus Torvalds can_dirty = 0; 34331da177e4SLinus Torvalds } 34341da177e4SLinus Torvalds cur = cur->hprev; 34351da177e4SLinus Torvalds } 34361da177e4SLinus Torvalds /* then test hnext. These are all older than cn. As long as they 34371da177e4SLinus Torvalds ** are committed to the log, it is safe to write cn to disk 34381da177e4SLinus Torvalds */ 34391da177e4SLinus Torvalds cur = cn->hnext; 34401da177e4SLinus Torvalds while (cur && can_dirty) { 34411da177e4SLinus Torvalds if (cur->jlist && cur->jlist->j_len > 0 && 34421da177e4SLinus Torvalds atomic_read(&(cur->jlist->j_commit_left)) > 0 && cur->bh && 34431da177e4SLinus Torvalds cur->blocknr && cur->sb == sb && cur->blocknr == blocknr) { 34441da177e4SLinus Torvalds can_dirty = 0; 34451da177e4SLinus Torvalds } 34461da177e4SLinus Torvalds cur = cur->hnext; 34471da177e4SLinus Torvalds } 34481da177e4SLinus Torvalds return can_dirty; 34491da177e4SLinus Torvalds } 34501da177e4SLinus Torvalds 34511da177e4SLinus Torvalds /* syncs the commit blocks, but does not force the real buffers to disk 34520779bf2dSMatt LaPlante ** will wait until the current transaction is done/committed before returning 34531da177e4SLinus Torvalds */ 3454bd4c625cSLinus Torvalds int journal_end_sync(struct reiserfs_transaction_handle *th, 3455a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks) 3456bd4c625cSLinus Torvalds { 3457a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 34581da177e4SLinus Torvalds 34591da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 34601da177e4SLinus Torvalds /* you can sync while nested, very, very bad */ 346114a61442SEric Sesterhenn BUG_ON(th->t_refcount > 1); 34621da177e4SLinus Torvalds if (journal->j_len == 0) { 3463a9dd3643SJeff Mahoney reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), 3464bd4c625cSLinus Torvalds 1); 3465a9dd3643SJeff Mahoney journal_mark_dirty(th, sb, SB_BUFFER_WITH_SB(sb)); 34661da177e4SLinus Torvalds } 3467a9dd3643SJeff Mahoney return do_journal_end(th, sb, nblocks, COMMIT_NOW | WAIT); 34681da177e4SLinus Torvalds } 34691da177e4SLinus Torvalds 34701da177e4SLinus Torvalds /* 34711da177e4SLinus Torvalds ** writeback the pending async commits to disk 34721da177e4SLinus Torvalds */ 3473c4028958SDavid Howells static void flush_async_commits(struct work_struct *work) 3474bd4c625cSLinus Torvalds { 3475c4028958SDavid Howells struct reiserfs_journal *journal = 3476c4028958SDavid Howells container_of(work, struct reiserfs_journal, j_work.work); 3477a9dd3643SJeff Mahoney struct super_block *sb = journal->j_work_sb; 34781da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 34791da177e4SLinus Torvalds struct list_head *entry; 34801da177e4SLinus Torvalds 34818ebc4232SFrederic Weisbecker reiserfs_write_lock(sb); 34821da177e4SLinus Torvalds if (!list_empty(&journal->j_journal_list)) { 34831da177e4SLinus Torvalds /* last entry is the youngest, commit it and you get everything */ 34841da177e4SLinus Torvalds entry = journal->j_journal_list.prev; 34851da177e4SLinus Torvalds jl = JOURNAL_LIST_ENTRY(entry); 3486a9dd3643SJeff Mahoney flush_commit_list(sb, jl, 1); 34871da177e4SLinus Torvalds } 34888ebc4232SFrederic Weisbecker reiserfs_write_unlock(sb); 34891da177e4SLinus Torvalds } 34901da177e4SLinus Torvalds 34911da177e4SLinus Torvalds /* 34921da177e4SLinus Torvalds ** flushes any old transactions to disk 34931da177e4SLinus Torvalds ** ends the current transaction if it is too old 34941da177e4SLinus Torvalds */ 349525729b0eSArtem Bityutskiy void reiserfs_flush_old_commits(struct super_block *sb) 3496bd4c625cSLinus Torvalds { 34971da177e4SLinus Torvalds time_t now; 34981da177e4SLinus Torvalds struct reiserfs_transaction_handle th; 3499a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 35001da177e4SLinus Torvalds 35011da177e4SLinus Torvalds now = get_seconds(); 35021da177e4SLinus Torvalds /* safety check so we don't flush while we are replaying the log during 35031da177e4SLinus Torvalds * mount 35041da177e4SLinus Torvalds */ 350525729b0eSArtem Bityutskiy if (list_empty(&journal->j_journal_list)) 350625729b0eSArtem Bityutskiy return; 35071da177e4SLinus Torvalds 35081da177e4SLinus Torvalds /* check the current transaction. If there are no writers, and it is 35091da177e4SLinus Torvalds * too old, finish it, and force the commit blocks to disk 35101da177e4SLinus Torvalds */ 35111da177e4SLinus Torvalds if (atomic_read(&journal->j_wcount) <= 0 && 35121da177e4SLinus Torvalds journal->j_trans_start_time > 0 && 35131da177e4SLinus Torvalds journal->j_len > 0 && 3514bd4c625cSLinus Torvalds (now - journal->j_trans_start_time) > journal->j_max_trans_age) { 3515a9dd3643SJeff Mahoney if (!journal_join(&th, sb, 1)) { 3516a9dd3643SJeff Mahoney reiserfs_prepare_for_journal(sb, 3517a9dd3643SJeff Mahoney SB_BUFFER_WITH_SB(sb), 3518bd4c625cSLinus Torvalds 1); 3519a9dd3643SJeff Mahoney journal_mark_dirty(&th, sb, 3520a9dd3643SJeff Mahoney SB_BUFFER_WITH_SB(sb)); 35211da177e4SLinus Torvalds 35221da177e4SLinus Torvalds /* we're only being called from kreiserfsd, it makes no sense to do 35231da177e4SLinus Torvalds ** an async commit so that kreiserfsd can do it later 35241da177e4SLinus Torvalds */ 3525a9dd3643SJeff Mahoney do_journal_end(&th, sb, 1, COMMIT_NOW | WAIT); 35261da177e4SLinus Torvalds } 35271da177e4SLinus Torvalds } 35281da177e4SLinus Torvalds } 35291da177e4SLinus Torvalds 35301da177e4SLinus Torvalds /* 35311da177e4SLinus Torvalds ** returns 0 if do_journal_end should return right away, returns 1 if do_journal_end should finish the commit 35321da177e4SLinus Torvalds ** 35331da177e4SLinus Torvalds ** if the current transaction is too old, but still has writers, this will wait on j_join_wait until all 35341da177e4SLinus Torvalds ** the writers are done. By the time it wakes up, the transaction it was called has already ended, so it just 35351da177e4SLinus Torvalds ** flushes the commit list and returns 0. 35361da177e4SLinus Torvalds ** 35371da177e4SLinus Torvalds ** Won't batch when flush or commit_now is set. Also won't batch when others are waiting on j_join_wait. 35381da177e4SLinus Torvalds ** 35391da177e4SLinus Torvalds ** Note, we can't allow the journal_end to proceed while there are still writers in the log. 35401da177e4SLinus Torvalds */ 3541bd4c625cSLinus Torvalds static int check_journal_end(struct reiserfs_transaction_handle *th, 3542a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks, 3543bd4c625cSLinus Torvalds int flags) 3544bd4c625cSLinus Torvalds { 35451da177e4SLinus Torvalds 35461da177e4SLinus Torvalds time_t now; 35471da177e4SLinus Torvalds int flush = flags & FLUSH_ALL; 35481da177e4SLinus Torvalds int commit_now = flags & COMMIT_NOW; 35491da177e4SLinus Torvalds int wait_on_commit = flags & WAIT; 35501da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 3551a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 35521da177e4SLinus Torvalds 35531da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 35541da177e4SLinus Torvalds 35551da177e4SLinus Torvalds if (th->t_trans_id != journal->j_trans_id) { 3556c3a9c210SJeff Mahoney reiserfs_panic(th->t_super, "journal-1577", 3557c3a9c210SJeff Mahoney "handle trans id %ld != current trans id %ld", 35581da177e4SLinus Torvalds th->t_trans_id, journal->j_trans_id); 35591da177e4SLinus Torvalds } 35601da177e4SLinus Torvalds 35611da177e4SLinus Torvalds journal->j_len_alloc -= (th->t_blocks_allocated - th->t_blocks_logged); 35621da177e4SLinus Torvalds if (atomic_read(&(journal->j_wcount)) > 0) { /* <= 0 is allowed. unmounting might not call begin */ 35631da177e4SLinus Torvalds atomic_dec(&(journal->j_wcount)); 35641da177e4SLinus Torvalds } 35651da177e4SLinus Torvalds 35661da177e4SLinus Torvalds /* BUG, deal with case where j_len is 0, but people previously freed blocks need to be released 35671da177e4SLinus Torvalds ** will be dealt with by next transaction that actually writes something, but should be taken 35681da177e4SLinus Torvalds ** care of in this trans 35691da177e4SLinus Torvalds */ 357014a61442SEric Sesterhenn BUG_ON(journal->j_len == 0); 357114a61442SEric Sesterhenn 35721da177e4SLinus Torvalds /* if wcount > 0, and we are called to with flush or commit_now, 35731da177e4SLinus Torvalds ** we wait on j_join_wait. We will wake up when the last writer has 35741da177e4SLinus Torvalds ** finished the transaction, and started it on its way to the disk. 35751da177e4SLinus Torvalds ** Then, we flush the commit or journal list, and just return 0 35761da177e4SLinus Torvalds ** because the rest of journal end was already done for this transaction. 35771da177e4SLinus Torvalds */ 35781da177e4SLinus Torvalds if (atomic_read(&(journal->j_wcount)) > 0) { 35791da177e4SLinus Torvalds if (flush || commit_now) { 35801da177e4SLinus Torvalds unsigned trans_id; 35811da177e4SLinus Torvalds 35821da177e4SLinus Torvalds jl = journal->j_current_jl; 35831da177e4SLinus Torvalds trans_id = jl->j_trans_id; 35841da177e4SLinus Torvalds if (wait_on_commit) 35851da177e4SLinus Torvalds jl->j_state |= LIST_COMMIT_PENDING; 35861da177e4SLinus Torvalds atomic_set(&(journal->j_jlock), 1); 35871da177e4SLinus Torvalds if (flush) { 35881da177e4SLinus Torvalds journal->j_next_full_flush = 1; 35891da177e4SLinus Torvalds } 3590a9dd3643SJeff Mahoney unlock_journal(sb); 35911da177e4SLinus Torvalds 35921da177e4SLinus Torvalds /* sleep while the current transaction is still j_jlocked */ 35931da177e4SLinus Torvalds while (journal->j_trans_id == trans_id) { 35941da177e4SLinus Torvalds if (atomic_read(&journal->j_jlock)) { 3595a9dd3643SJeff Mahoney queue_log_writer(sb); 35961da177e4SLinus Torvalds } else { 3597a9dd3643SJeff Mahoney lock_journal(sb); 35981da177e4SLinus Torvalds if (journal->j_trans_id == trans_id) { 3599bd4c625cSLinus Torvalds atomic_set(&(journal->j_jlock), 3600bd4c625cSLinus Torvalds 1); 36011da177e4SLinus Torvalds } 3602a9dd3643SJeff Mahoney unlock_journal(sb); 36031da177e4SLinus Torvalds } 36041da177e4SLinus Torvalds } 360514a61442SEric Sesterhenn BUG_ON(journal->j_trans_id == trans_id); 360614a61442SEric Sesterhenn 3607bd4c625cSLinus Torvalds if (commit_now 3608a9dd3643SJeff Mahoney && journal_list_still_alive(sb, trans_id) 3609bd4c625cSLinus Torvalds && wait_on_commit) { 3610a9dd3643SJeff Mahoney flush_commit_list(sb, jl, 1); 36111da177e4SLinus Torvalds } 36121da177e4SLinus Torvalds return 0; 36131da177e4SLinus Torvalds } 3614a9dd3643SJeff Mahoney unlock_journal(sb); 36151da177e4SLinus Torvalds return 0; 36161da177e4SLinus Torvalds } 36171da177e4SLinus Torvalds 36181da177e4SLinus Torvalds /* deal with old transactions where we are the last writers */ 36191da177e4SLinus Torvalds now = get_seconds(); 36201da177e4SLinus Torvalds if ((now - journal->j_trans_start_time) > journal->j_max_trans_age) { 36211da177e4SLinus Torvalds commit_now = 1; 36221da177e4SLinus Torvalds journal->j_next_async_flush = 1; 36231da177e4SLinus Torvalds } 36241da177e4SLinus Torvalds /* don't batch when someone is waiting on j_join_wait */ 36251da177e4SLinus Torvalds /* don't batch when syncing the commit or flushing the whole trans */ 3626bd4c625cSLinus Torvalds if (!(journal->j_must_wait > 0) && !(atomic_read(&(journal->j_jlock))) 3627bd4c625cSLinus Torvalds && !flush && !commit_now && (journal->j_len < journal->j_max_batch) 3628bd4c625cSLinus Torvalds && journal->j_len_alloc < journal->j_max_batch 3629bd4c625cSLinus Torvalds && journal->j_cnode_free > (journal->j_trans_max * 3)) { 36301da177e4SLinus Torvalds journal->j_bcount++; 3631a9dd3643SJeff Mahoney unlock_journal(sb); 36321da177e4SLinus Torvalds return 0; 36331da177e4SLinus Torvalds } 36341da177e4SLinus Torvalds 3635a9dd3643SJeff Mahoney if (journal->j_start > SB_ONDISK_JOURNAL_SIZE(sb)) { 3636a9dd3643SJeff Mahoney reiserfs_panic(sb, "journal-003", 3637c3a9c210SJeff Mahoney "j_start (%ld) is too high", 3638bd4c625cSLinus Torvalds journal->j_start); 36391da177e4SLinus Torvalds } 36401da177e4SLinus Torvalds return 1; 36411da177e4SLinus Torvalds } 36421da177e4SLinus Torvalds 36431da177e4SLinus Torvalds /* 36441da177e4SLinus Torvalds ** Does all the work that makes deleting blocks safe. 36451da177e4SLinus Torvalds ** when deleting a block mark BH_JNew, just remove it from the current transaction, clean it's buffer_head and move on. 36461da177e4SLinus Torvalds ** 36471da177e4SLinus Torvalds ** otherwise: 36481da177e4SLinus Torvalds ** set a bit for the block in the journal bitmap. That will prevent it from being allocated for unformatted nodes 36491da177e4SLinus Torvalds ** before this transaction has finished. 36501da177e4SLinus Torvalds ** 36511da177e4SLinus Torvalds ** mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers. That will prevent any old transactions with 36521da177e4SLinus Torvalds ** this block from trying to flush to the real location. Since we aren't removing the cnode from the journal_list_hash, 36531da177e4SLinus Torvalds ** the block can't be reallocated yet. 36541da177e4SLinus Torvalds ** 36551da177e4SLinus Torvalds ** Then remove it from the current transaction, decrementing any counters and filing it on the clean list. 36561da177e4SLinus Torvalds */ 3657bd4c625cSLinus Torvalds int journal_mark_freed(struct reiserfs_transaction_handle *th, 3658a9dd3643SJeff Mahoney struct super_block *sb, b_blocknr_t blocknr) 3659bd4c625cSLinus Torvalds { 3660a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 36611da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn = NULL; 36621da177e4SLinus Torvalds struct buffer_head *bh = NULL; 36631da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb = NULL; 36641da177e4SLinus Torvalds int cleaned = 0; 36651da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 36661da177e4SLinus Torvalds 3667a9dd3643SJeff Mahoney cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr); 36681da177e4SLinus Torvalds if (cn && cn->bh) { 36691da177e4SLinus Torvalds bh = cn->bh; 36701da177e4SLinus Torvalds get_bh(bh); 36711da177e4SLinus Torvalds } 36721da177e4SLinus Torvalds /* if it is journal new, we just remove it from this transaction */ 36731da177e4SLinus Torvalds if (bh && buffer_journal_new(bh)) { 36741da177e4SLinus Torvalds clear_buffer_journal_new(bh); 36751da177e4SLinus Torvalds clear_prepared_bits(bh); 36761da177e4SLinus Torvalds reiserfs_clean_and_file_buffer(bh); 3677a9dd3643SJeff Mahoney cleaned = remove_from_transaction(sb, blocknr, cleaned); 36781da177e4SLinus Torvalds } else { 36791da177e4SLinus Torvalds /* set the bit for this block in the journal bitmap for this transaction */ 36801da177e4SLinus Torvalds jb = journal->j_current_jl->j_list_bitmap; 36811da177e4SLinus Torvalds if (!jb) { 3682a9dd3643SJeff Mahoney reiserfs_panic(sb, "journal-1702", 3683c3a9c210SJeff Mahoney "journal_list_bitmap is NULL"); 36841da177e4SLinus Torvalds } 3685a9dd3643SJeff Mahoney set_bit_in_list_bitmap(sb, blocknr, jb); 36861da177e4SLinus Torvalds 36871da177e4SLinus Torvalds /* Note, the entire while loop is not allowed to schedule. */ 36881da177e4SLinus Torvalds 36891da177e4SLinus Torvalds if (bh) { 36901da177e4SLinus Torvalds clear_prepared_bits(bh); 36911da177e4SLinus Torvalds reiserfs_clean_and_file_buffer(bh); 36921da177e4SLinus Torvalds } 3693a9dd3643SJeff Mahoney cleaned = remove_from_transaction(sb, blocknr, cleaned); 36941da177e4SLinus Torvalds 36951da177e4SLinus Torvalds /* find all older transactions with this block, make sure they don't try to write it out */ 3696a9dd3643SJeff Mahoney cn = get_journal_hash_dev(sb, journal->j_list_hash_table, 3697bd4c625cSLinus Torvalds blocknr); 36981da177e4SLinus Torvalds while (cn) { 3699a9dd3643SJeff Mahoney if (sb == cn->sb && blocknr == cn->blocknr) { 37001da177e4SLinus Torvalds set_bit(BLOCK_FREED, &cn->state); 37011da177e4SLinus Torvalds if (cn->bh) { 37021da177e4SLinus Torvalds if (!cleaned) { 37031da177e4SLinus Torvalds /* remove_from_transaction will brelse the buffer if it was 37041da177e4SLinus Torvalds ** in the current trans 37051da177e4SLinus Torvalds */ 3706bd4c625cSLinus Torvalds clear_buffer_journal_dirty(cn-> 3707bd4c625cSLinus Torvalds bh); 37081da177e4SLinus Torvalds clear_buffer_dirty(cn->bh); 3709bd4c625cSLinus Torvalds clear_buffer_journal_test(cn-> 3710bd4c625cSLinus Torvalds bh); 37111da177e4SLinus Torvalds cleaned = 1; 37121da177e4SLinus Torvalds put_bh(cn->bh); 3713bd4c625cSLinus Torvalds if (atomic_read 3714bd4c625cSLinus Torvalds (&(cn->bh->b_count)) < 0) { 3715a9dd3643SJeff Mahoney reiserfs_warning(sb, 371645b03d5eSJeff Mahoney "journal-2138", 371745b03d5eSJeff Mahoney "cn->bh->b_count < 0"); 37181da177e4SLinus Torvalds } 37191da177e4SLinus Torvalds } 37201da177e4SLinus Torvalds if (cn->jlist) { /* since we are clearing the bh, we MUST dec nonzerolen */ 3721bd4c625cSLinus Torvalds atomic_dec(& 3722bd4c625cSLinus Torvalds (cn->jlist-> 3723bd4c625cSLinus Torvalds j_nonzerolen)); 37241da177e4SLinus Torvalds } 37251da177e4SLinus Torvalds cn->bh = NULL; 37261da177e4SLinus Torvalds } 37271da177e4SLinus Torvalds } 37281da177e4SLinus Torvalds cn = cn->hnext; 37291da177e4SLinus Torvalds } 37301da177e4SLinus Torvalds } 37311da177e4SLinus Torvalds 3732398c95bdSChris Mason if (bh) 3733398c95bdSChris Mason release_buffer_page(bh); /* get_hash grabs the buffer */ 37341da177e4SLinus Torvalds return 0; 37351da177e4SLinus Torvalds } 37361da177e4SLinus Torvalds 3737bd4c625cSLinus Torvalds void reiserfs_update_inode_transaction(struct inode *inode) 3738bd4c625cSLinus Torvalds { 37391da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(inode->i_sb); 37401da177e4SLinus Torvalds REISERFS_I(inode)->i_jl = journal->j_current_jl; 37411da177e4SLinus Torvalds REISERFS_I(inode)->i_trans_id = journal->j_trans_id; 37421da177e4SLinus Torvalds } 37431da177e4SLinus Torvalds 37441da177e4SLinus Torvalds /* 37451da177e4SLinus Torvalds * returns -1 on error, 0 if no commits/barriers were done and 1 37461da177e4SLinus Torvalds * if a transaction was actually committed and the barrier was done 37471da177e4SLinus Torvalds */ 37481da177e4SLinus Torvalds static int __commit_trans_jl(struct inode *inode, unsigned long id, 37491da177e4SLinus Torvalds struct reiserfs_journal_list *jl) 37501da177e4SLinus Torvalds { 37511da177e4SLinus Torvalds struct reiserfs_transaction_handle th; 37521da177e4SLinus Torvalds struct super_block *sb = inode->i_sb; 37531da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(sb); 37541da177e4SLinus Torvalds int ret = 0; 37551da177e4SLinus Torvalds 37561da177e4SLinus Torvalds /* is it from the current transaction, or from an unknown transaction? */ 37571da177e4SLinus Torvalds if (id == journal->j_trans_id) { 37581da177e4SLinus Torvalds jl = journal->j_current_jl; 37591da177e4SLinus Torvalds /* try to let other writers come in and grow this transaction */ 37601da177e4SLinus Torvalds let_transaction_grow(sb, id); 37611da177e4SLinus Torvalds if (journal->j_trans_id != id) { 37621da177e4SLinus Torvalds goto flush_commit_only; 37631da177e4SLinus Torvalds } 37641da177e4SLinus Torvalds 37651da177e4SLinus Torvalds ret = journal_begin(&th, sb, 1); 37661da177e4SLinus Torvalds if (ret) 37671da177e4SLinus Torvalds return ret; 37681da177e4SLinus Torvalds 37691da177e4SLinus Torvalds /* someone might have ended this transaction while we joined */ 37701da177e4SLinus Torvalds if (journal->j_trans_id != id) { 3771bd4c625cSLinus Torvalds reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), 3772bd4c625cSLinus Torvalds 1); 37731da177e4SLinus Torvalds journal_mark_dirty(&th, sb, SB_BUFFER_WITH_SB(sb)); 37741da177e4SLinus Torvalds ret = journal_end(&th, sb, 1); 37751da177e4SLinus Torvalds goto flush_commit_only; 37761da177e4SLinus Torvalds } 37771da177e4SLinus Torvalds 37781da177e4SLinus Torvalds ret = journal_end_sync(&th, sb, 1); 37791da177e4SLinus Torvalds if (!ret) 37801da177e4SLinus Torvalds ret = 1; 37811da177e4SLinus Torvalds 37821da177e4SLinus Torvalds } else { 37831da177e4SLinus Torvalds /* this gets tricky, we have to make sure the journal list in 37841da177e4SLinus Torvalds * the inode still exists. We know the list is still around 37851da177e4SLinus Torvalds * if we've got a larger transaction id than the oldest list 37861da177e4SLinus Torvalds */ 37871da177e4SLinus Torvalds flush_commit_only: 37881da177e4SLinus Torvalds if (journal_list_still_alive(inode->i_sb, id)) { 37891da177e4SLinus Torvalds /* 37901da177e4SLinus Torvalds * we only set ret to 1 when we know for sure 37911da177e4SLinus Torvalds * the barrier hasn't been started yet on the commit 37921da177e4SLinus Torvalds * block. 37931da177e4SLinus Torvalds */ 37941da177e4SLinus Torvalds if (atomic_read(&jl->j_commit_left) > 1) 37951da177e4SLinus Torvalds ret = 1; 37961da177e4SLinus Torvalds flush_commit_list(sb, jl, 1); 37971da177e4SLinus Torvalds if (journal->j_errno) 37981da177e4SLinus Torvalds ret = journal->j_errno; 37991da177e4SLinus Torvalds } 38001da177e4SLinus Torvalds } 38011da177e4SLinus Torvalds /* otherwise the list is gone, and long since committed */ 38021da177e4SLinus Torvalds return ret; 38031da177e4SLinus Torvalds } 38041da177e4SLinus Torvalds 3805bd4c625cSLinus Torvalds int reiserfs_commit_for_inode(struct inode *inode) 3806bd4c625cSLinus Torvalds { 3807600ed416SJeff Mahoney unsigned int id = REISERFS_I(inode)->i_trans_id; 38081da177e4SLinus Torvalds struct reiserfs_journal_list *jl = REISERFS_I(inode)->i_jl; 38091da177e4SLinus Torvalds 38101da177e4SLinus Torvalds /* for the whole inode, assume unset id means it was 38111da177e4SLinus Torvalds * changed in the current transaction. More conservative 38121da177e4SLinus Torvalds */ 38131da177e4SLinus Torvalds if (!id || !jl) { 38141da177e4SLinus Torvalds reiserfs_update_inode_transaction(inode); 38151da177e4SLinus Torvalds id = REISERFS_I(inode)->i_trans_id; 38161da177e4SLinus Torvalds /* jl will be updated in __commit_trans_jl */ 38171da177e4SLinus Torvalds } 38181da177e4SLinus Torvalds 38191da177e4SLinus Torvalds return __commit_trans_jl(inode, id, jl); 38201da177e4SLinus Torvalds } 38211da177e4SLinus Torvalds 3822a9dd3643SJeff Mahoney void reiserfs_restore_prepared_buffer(struct super_block *sb, 3823bd4c625cSLinus Torvalds struct buffer_head *bh) 3824bd4c625cSLinus Torvalds { 3825a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 3826a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.restore_prepared); 38271da177e4SLinus Torvalds if (!bh) { 38281da177e4SLinus Torvalds return; 38291da177e4SLinus Torvalds } 38301da177e4SLinus Torvalds if (test_clear_buffer_journal_restore_dirty(bh) && 38311da177e4SLinus Torvalds buffer_journal_dirty(bh)) { 38321da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 3833a9dd3643SJeff Mahoney cn = get_journal_hash_dev(sb, 38341da177e4SLinus Torvalds journal->j_list_hash_table, 38351da177e4SLinus Torvalds bh->b_blocknr); 38361da177e4SLinus Torvalds if (cn && can_dirty(cn)) { 38371da177e4SLinus Torvalds set_buffer_journal_test(bh); 38381da177e4SLinus Torvalds mark_buffer_dirty(bh); 38391da177e4SLinus Torvalds } 38401da177e4SLinus Torvalds } 38411da177e4SLinus Torvalds clear_buffer_journal_prepared(bh); 38421da177e4SLinus Torvalds } 38431da177e4SLinus Torvalds 38441da177e4SLinus Torvalds extern struct tree_balance *cur_tb; 38451da177e4SLinus Torvalds /* 38461da177e4SLinus Torvalds ** before we can change a metadata block, we have to make sure it won't 38471da177e4SLinus Torvalds ** be written to disk while we are altering it. So, we must: 38481da177e4SLinus Torvalds ** clean it 38491da177e4SLinus Torvalds ** wait on it. 38501da177e4SLinus Torvalds ** 38511da177e4SLinus Torvalds */ 3852a9dd3643SJeff Mahoney int reiserfs_prepare_for_journal(struct super_block *sb, 3853bd4c625cSLinus Torvalds struct buffer_head *bh, int wait) 3854bd4c625cSLinus Torvalds { 3855a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.prepare); 38561da177e4SLinus Torvalds 3857ca5de404SNick Piggin if (!trylock_buffer(bh)) { 38581da177e4SLinus Torvalds if (!wait) 38591da177e4SLinus Torvalds return 0; 38601da177e4SLinus Torvalds lock_buffer(bh); 38611da177e4SLinus Torvalds } 38621da177e4SLinus Torvalds set_buffer_journal_prepared(bh); 38631da177e4SLinus Torvalds if (test_clear_buffer_dirty(bh) && buffer_journal_dirty(bh)) { 38641da177e4SLinus Torvalds clear_buffer_journal_test(bh); 38651da177e4SLinus Torvalds set_buffer_journal_restore_dirty(bh); 38661da177e4SLinus Torvalds } 38671da177e4SLinus Torvalds unlock_buffer(bh); 38681da177e4SLinus Torvalds return 1; 38691da177e4SLinus Torvalds } 38701da177e4SLinus Torvalds 3871bd4c625cSLinus Torvalds static void flush_old_journal_lists(struct super_block *s) 3872bd4c625cSLinus Torvalds { 38731da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 38741da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 38751da177e4SLinus Torvalds struct list_head *entry; 38761da177e4SLinus Torvalds time_t now = get_seconds(); 38771da177e4SLinus Torvalds 38781da177e4SLinus Torvalds while (!list_empty(&journal->j_journal_list)) { 38791da177e4SLinus Torvalds entry = journal->j_journal_list.next; 38801da177e4SLinus Torvalds jl = JOURNAL_LIST_ENTRY(entry); 38811da177e4SLinus Torvalds /* this check should always be run, to send old lists to disk */ 3882a3172027SChris Mason if (jl->j_timestamp < (now - (JOURNAL_MAX_TRANS_AGE * 4)) && 3883a3172027SChris Mason atomic_read(&jl->j_commit_left) == 0 && 3884a3172027SChris Mason test_transaction(s, jl)) { 38851da177e4SLinus Torvalds flush_used_journal_lists(s, jl); 38861da177e4SLinus Torvalds } else { 38871da177e4SLinus Torvalds break; 38881da177e4SLinus Torvalds } 38891da177e4SLinus Torvalds } 38901da177e4SLinus Torvalds } 38911da177e4SLinus Torvalds 38921da177e4SLinus Torvalds /* 38931da177e4SLinus Torvalds ** long and ugly. If flush, will not return until all commit 38941da177e4SLinus Torvalds ** blocks and all real buffers in the trans are on disk. 38951da177e4SLinus Torvalds ** If no_async, won't return until all commit blocks are on disk. 38961da177e4SLinus Torvalds ** 38971da177e4SLinus Torvalds ** keep reading, there are comments as you go along 38981da177e4SLinus Torvalds ** 38991da177e4SLinus Torvalds ** If the journal is aborted, we just clean up. Things like flushing 39001da177e4SLinus Torvalds ** journal lists, etc just won't happen. 39011da177e4SLinus Torvalds */ 3902bd4c625cSLinus Torvalds static int do_journal_end(struct reiserfs_transaction_handle *th, 3903a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks, 3904bd4c625cSLinus Torvalds int flags) 3905bd4c625cSLinus Torvalds { 3906a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 39071da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn, *next, *jl_cn; 39081da177e4SLinus Torvalds struct reiserfs_journal_cnode *last_cn = NULL; 39091da177e4SLinus Torvalds struct reiserfs_journal_desc *desc; 39101da177e4SLinus Torvalds struct reiserfs_journal_commit *commit; 39111da177e4SLinus Torvalds struct buffer_head *c_bh; /* commit bh */ 39121da177e4SLinus Torvalds struct buffer_head *d_bh; /* desc bh */ 39131da177e4SLinus Torvalds int cur_write_start = 0; /* start index of current log write */ 39141da177e4SLinus Torvalds int old_start; 39151da177e4SLinus Torvalds int i; 3916a44c94a7SAlexander Zarochentsev int flush; 3917a44c94a7SAlexander Zarochentsev int wait_on_commit; 39181da177e4SLinus Torvalds struct reiserfs_journal_list *jl, *temp_jl; 39191da177e4SLinus Torvalds struct list_head *entry, *safe; 39201da177e4SLinus Torvalds unsigned long jindex; 3921600ed416SJeff Mahoney unsigned int commit_trans_id; 39221da177e4SLinus Torvalds int trans_half; 39231da177e4SLinus Torvalds 39241da177e4SLinus Torvalds BUG_ON(th->t_refcount > 1); 39251da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 39261da177e4SLinus Torvalds 3927a44c94a7SAlexander Zarochentsev /* protect flush_older_commits from doing mistakes if the 3928a44c94a7SAlexander Zarochentsev transaction ID counter gets overflowed. */ 3929600ed416SJeff Mahoney if (th->t_trans_id == ~0U) 3930a44c94a7SAlexander Zarochentsev flags |= FLUSH_ALL | COMMIT_NOW | WAIT; 3931a44c94a7SAlexander Zarochentsev flush = flags & FLUSH_ALL; 3932a44c94a7SAlexander Zarochentsev wait_on_commit = flags & WAIT; 3933a44c94a7SAlexander Zarochentsev 39341da177e4SLinus Torvalds current->journal_info = th->t_handle_save; 3935a9dd3643SJeff Mahoney reiserfs_check_lock_depth(sb, "journal end"); 39361da177e4SLinus Torvalds if (journal->j_len == 0) { 3937a9dd3643SJeff Mahoney reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), 3938bd4c625cSLinus Torvalds 1); 3939a9dd3643SJeff Mahoney journal_mark_dirty(th, sb, SB_BUFFER_WITH_SB(sb)); 39401da177e4SLinus Torvalds } 39411da177e4SLinus Torvalds 3942a9dd3643SJeff Mahoney lock_journal(sb); 39431da177e4SLinus Torvalds if (journal->j_next_full_flush) { 39441da177e4SLinus Torvalds flags |= FLUSH_ALL; 39451da177e4SLinus Torvalds flush = 1; 39461da177e4SLinus Torvalds } 39471da177e4SLinus Torvalds if (journal->j_next_async_flush) { 39481da177e4SLinus Torvalds flags |= COMMIT_NOW | WAIT; 39491da177e4SLinus Torvalds wait_on_commit = 1; 39501da177e4SLinus Torvalds } 39511da177e4SLinus Torvalds 39521da177e4SLinus Torvalds /* check_journal_end locks the journal, and unlocks if it does not return 1 39531da177e4SLinus Torvalds ** it tells us if we should continue with the journal_end, or just return 39541da177e4SLinus Torvalds */ 3955a9dd3643SJeff Mahoney if (!check_journal_end(th, sb, nblocks, flags)) { 3956a9dd3643SJeff Mahoney sb->s_dirt = 1; 3957a9dd3643SJeff Mahoney wake_queued_writers(sb); 3958a9dd3643SJeff Mahoney reiserfs_async_progress_wait(sb); 39591da177e4SLinus Torvalds goto out; 39601da177e4SLinus Torvalds } 39611da177e4SLinus Torvalds 39621da177e4SLinus Torvalds /* check_journal_end might set these, check again */ 39631da177e4SLinus Torvalds if (journal->j_next_full_flush) { 39641da177e4SLinus Torvalds flush = 1; 39651da177e4SLinus Torvalds } 39661da177e4SLinus Torvalds 39671da177e4SLinus Torvalds /* 39681da177e4SLinus Torvalds ** j must wait means we have to flush the log blocks, and the real blocks for 39691da177e4SLinus Torvalds ** this transaction 39701da177e4SLinus Torvalds */ 39711da177e4SLinus Torvalds if (journal->j_must_wait > 0) { 39721da177e4SLinus Torvalds flush = 1; 39731da177e4SLinus Torvalds } 39741da177e4SLinus Torvalds #ifdef REISERFS_PREALLOCATE 3975ef43bc4fSJan Kara /* quota ops might need to nest, setup the journal_info pointer for them 3976ef43bc4fSJan Kara * and raise the refcount so that it is > 0. */ 39771da177e4SLinus Torvalds current->journal_info = th; 3978ef43bc4fSJan Kara th->t_refcount++; 39791da177e4SLinus Torvalds reiserfs_discard_all_prealloc(th); /* it should not involve new blocks into 39801da177e4SLinus Torvalds * the transaction */ 3981ef43bc4fSJan Kara th->t_refcount--; 39821da177e4SLinus Torvalds current->journal_info = th->t_handle_save; 39831da177e4SLinus Torvalds #endif 39841da177e4SLinus Torvalds 39851da177e4SLinus Torvalds /* setup description block */ 3986bd4c625cSLinus Torvalds d_bh = 3987a9dd3643SJeff Mahoney journal_getblk(sb, 3988a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 3989bd4c625cSLinus Torvalds journal->j_start); 39901da177e4SLinus Torvalds set_buffer_uptodate(d_bh); 39911da177e4SLinus Torvalds desc = (struct reiserfs_journal_desc *)(d_bh)->b_data; 39921da177e4SLinus Torvalds memset(d_bh->b_data, 0, d_bh->b_size); 39931da177e4SLinus Torvalds memcpy(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8); 39941da177e4SLinus Torvalds set_desc_trans_id(desc, journal->j_trans_id); 39951da177e4SLinus Torvalds 39961da177e4SLinus Torvalds /* setup commit block. Don't write (keep it clean too) this one until after everyone else is written */ 3997a9dd3643SJeff Mahoney c_bh = journal_getblk(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 3998bd4c625cSLinus Torvalds ((journal->j_start + journal->j_len + 3999a9dd3643SJeff Mahoney 1) % SB_ONDISK_JOURNAL_SIZE(sb))); 40001da177e4SLinus Torvalds commit = (struct reiserfs_journal_commit *)c_bh->b_data; 40011da177e4SLinus Torvalds memset(c_bh->b_data, 0, c_bh->b_size); 40021da177e4SLinus Torvalds set_commit_trans_id(commit, journal->j_trans_id); 40031da177e4SLinus Torvalds set_buffer_uptodate(c_bh); 40041da177e4SLinus Torvalds 40051da177e4SLinus Torvalds /* init this journal list */ 40061da177e4SLinus Torvalds jl = journal->j_current_jl; 40071da177e4SLinus Torvalds 40081da177e4SLinus Torvalds /* we lock the commit before doing anything because 40091da177e4SLinus Torvalds * we want to make sure nobody tries to run flush_commit_list until 40101da177e4SLinus Torvalds * the new transaction is fully setup, and we've already flushed the 40111da177e4SLinus Torvalds * ordered bh list 40121da177e4SLinus Torvalds */ 40138ebc4232SFrederic Weisbecker reiserfs_mutex_lock_safe(&jl->j_commit_mutex, sb); 40141da177e4SLinus Torvalds 40151da177e4SLinus Torvalds /* save the transaction id in case we need to commit it later */ 40161da177e4SLinus Torvalds commit_trans_id = jl->j_trans_id; 40171da177e4SLinus Torvalds 40181da177e4SLinus Torvalds atomic_set(&jl->j_older_commits_done, 0); 40191da177e4SLinus Torvalds jl->j_trans_id = journal->j_trans_id; 40201da177e4SLinus Torvalds jl->j_timestamp = journal->j_trans_start_time; 40211da177e4SLinus Torvalds jl->j_commit_bh = c_bh; 40221da177e4SLinus Torvalds jl->j_start = journal->j_start; 40231da177e4SLinus Torvalds jl->j_len = journal->j_len; 40241da177e4SLinus Torvalds atomic_set(&jl->j_nonzerolen, journal->j_len); 40251da177e4SLinus Torvalds atomic_set(&jl->j_commit_left, journal->j_len + 2); 40261da177e4SLinus Torvalds jl->j_realblock = NULL; 40271da177e4SLinus Torvalds 40281da177e4SLinus Torvalds /* The ENTIRE FOR LOOP MUST not cause schedule to occur. 40291da177e4SLinus Torvalds ** for each real block, add it to the journal list hash, 40301da177e4SLinus Torvalds ** copy into real block index array in the commit or desc block 40311da177e4SLinus Torvalds */ 4032a9dd3643SJeff Mahoney trans_half = journal_trans_half(sb->s_blocksize); 40331da177e4SLinus Torvalds for (i = 0, cn = journal->j_first; cn; cn = cn->next, i++) { 40341da177e4SLinus Torvalds if (buffer_journaled(cn->bh)) { 4035a9dd3643SJeff Mahoney jl_cn = get_cnode(sb); 40361da177e4SLinus Torvalds if (!jl_cn) { 4037a9dd3643SJeff Mahoney reiserfs_panic(sb, "journal-1676", 4038c3a9c210SJeff Mahoney "get_cnode returned NULL"); 40391da177e4SLinus Torvalds } 40401da177e4SLinus Torvalds if (i == 0) { 40411da177e4SLinus Torvalds jl->j_realblock = jl_cn; 40421da177e4SLinus Torvalds } 40431da177e4SLinus Torvalds jl_cn->prev = last_cn; 40441da177e4SLinus Torvalds jl_cn->next = NULL; 40451da177e4SLinus Torvalds if (last_cn) { 40461da177e4SLinus Torvalds last_cn->next = jl_cn; 40471da177e4SLinus Torvalds } 40481da177e4SLinus Torvalds last_cn = jl_cn; 40491da177e4SLinus Torvalds /* make sure the block we are trying to log is not a block 40501da177e4SLinus Torvalds of journal or reserved area */ 40511da177e4SLinus Torvalds 4052bd4c625cSLinus Torvalds if (is_block_in_log_or_reserved_area 4053a9dd3643SJeff Mahoney (sb, cn->bh->b_blocknr)) { 4054a9dd3643SJeff Mahoney reiserfs_panic(sb, "journal-2332", 4055c3a9c210SJeff Mahoney "Trying to log block %lu, " 4056c3a9c210SJeff Mahoney "which is a log block", 4057bd4c625cSLinus Torvalds cn->bh->b_blocknr); 40581da177e4SLinus Torvalds } 40591da177e4SLinus Torvalds jl_cn->blocknr = cn->bh->b_blocknr; 40601da177e4SLinus Torvalds jl_cn->state = 0; 4061a9dd3643SJeff Mahoney jl_cn->sb = sb; 40621da177e4SLinus Torvalds jl_cn->bh = cn->bh; 40631da177e4SLinus Torvalds jl_cn->jlist = jl; 40641da177e4SLinus Torvalds insert_journal_hash(journal->j_list_hash_table, jl_cn); 40651da177e4SLinus Torvalds if (i < trans_half) { 4066bd4c625cSLinus Torvalds desc->j_realblock[i] = 4067bd4c625cSLinus Torvalds cpu_to_le32(cn->bh->b_blocknr); 40681da177e4SLinus Torvalds } else { 4069bd4c625cSLinus Torvalds commit->j_realblock[i - trans_half] = 4070bd4c625cSLinus Torvalds cpu_to_le32(cn->bh->b_blocknr); 40711da177e4SLinus Torvalds } 40721da177e4SLinus Torvalds } else { 40731da177e4SLinus Torvalds i--; 40741da177e4SLinus Torvalds } 40751da177e4SLinus Torvalds } 40761da177e4SLinus Torvalds set_desc_trans_len(desc, journal->j_len); 40771da177e4SLinus Torvalds set_desc_mount_id(desc, journal->j_mount_id); 40781da177e4SLinus Torvalds set_desc_trans_id(desc, journal->j_trans_id); 40791da177e4SLinus Torvalds set_commit_trans_len(commit, journal->j_len); 40801da177e4SLinus Torvalds 40811da177e4SLinus Torvalds /* special check in case all buffers in the journal were marked for not logging */ 408214a61442SEric Sesterhenn BUG_ON(journal->j_len == 0); 40831da177e4SLinus Torvalds 40841da177e4SLinus Torvalds /* we're about to dirty all the log blocks, mark the description block 40851da177e4SLinus Torvalds * dirty now too. Don't mark the commit block dirty until all the 40861da177e4SLinus Torvalds * others are on disk 40871da177e4SLinus Torvalds */ 40881da177e4SLinus Torvalds mark_buffer_dirty(d_bh); 40891da177e4SLinus Torvalds 40901da177e4SLinus Torvalds /* first data block is j_start + 1, so add one to cur_write_start wherever you use it */ 40911da177e4SLinus Torvalds cur_write_start = journal->j_start; 40921da177e4SLinus Torvalds cn = journal->j_first; 40931da177e4SLinus Torvalds jindex = 1; /* start at one so we don't get the desc again */ 40941da177e4SLinus Torvalds while (cn) { 40951da177e4SLinus Torvalds clear_buffer_journal_new(cn->bh); 40961da177e4SLinus Torvalds /* copy all the real blocks into log area. dirty log blocks */ 40971da177e4SLinus Torvalds if (buffer_journaled(cn->bh)) { 40981da177e4SLinus Torvalds struct buffer_head *tmp_bh; 40991da177e4SLinus Torvalds char *addr; 41001da177e4SLinus Torvalds struct page *page; 4101bd4c625cSLinus Torvalds tmp_bh = 4102a9dd3643SJeff Mahoney journal_getblk(sb, 4103a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 4104bd4c625cSLinus Torvalds ((cur_write_start + 4105bd4c625cSLinus Torvalds jindex) % 4106a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb))); 41071da177e4SLinus Torvalds set_buffer_uptodate(tmp_bh); 41081da177e4SLinus Torvalds page = cn->bh->b_page; 41091da177e4SLinus Torvalds addr = kmap(page); 4110bd4c625cSLinus Torvalds memcpy(tmp_bh->b_data, 4111bd4c625cSLinus Torvalds addr + offset_in_page(cn->bh->b_data), 41121da177e4SLinus Torvalds cn->bh->b_size); 41131da177e4SLinus Torvalds kunmap(page); 41141da177e4SLinus Torvalds mark_buffer_dirty(tmp_bh); 41151da177e4SLinus Torvalds jindex++; 41161da177e4SLinus Torvalds set_buffer_journal_dirty(cn->bh); 41171da177e4SLinus Torvalds clear_buffer_journaled(cn->bh); 41181da177e4SLinus Torvalds } else { 41191da177e4SLinus Torvalds /* JDirty cleared sometime during transaction. don't log this one */ 4120a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-2048", 412145b03d5eSJeff Mahoney "BAD, buffer in journal hash, " 412245b03d5eSJeff Mahoney "but not JDirty!"); 41231da177e4SLinus Torvalds brelse(cn->bh); 41241da177e4SLinus Torvalds } 41251da177e4SLinus Torvalds next = cn->next; 4126a9dd3643SJeff Mahoney free_cnode(sb, cn); 41271da177e4SLinus Torvalds cn = next; 4128e6950a4dSFrederic Weisbecker reiserfs_write_unlock(sb); 41291da177e4SLinus Torvalds cond_resched(); 4130e6950a4dSFrederic Weisbecker reiserfs_write_lock(sb); 41311da177e4SLinus Torvalds } 41321da177e4SLinus Torvalds 41331da177e4SLinus Torvalds /* we are done with both the c_bh and d_bh, but 41341da177e4SLinus Torvalds ** c_bh must be written after all other commit blocks, 41351da177e4SLinus Torvalds ** so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1. 41361da177e4SLinus Torvalds */ 41371da177e4SLinus Torvalds 4138a9dd3643SJeff Mahoney journal->j_current_jl = alloc_journal_list(sb); 41391da177e4SLinus Torvalds 41401da177e4SLinus Torvalds /* now it is safe to insert this transaction on the main list */ 41411da177e4SLinus Torvalds list_add_tail(&jl->j_list, &journal->j_journal_list); 41421da177e4SLinus Torvalds list_add_tail(&jl->j_working_list, &journal->j_working_list); 41431da177e4SLinus Torvalds journal->j_num_work_lists++; 41441da177e4SLinus Torvalds 41451da177e4SLinus Torvalds /* reset journal values for the next transaction */ 41461da177e4SLinus Torvalds old_start = journal->j_start; 4147bd4c625cSLinus Torvalds journal->j_start = 4148bd4c625cSLinus Torvalds (journal->j_start + journal->j_len + 4149a9dd3643SJeff Mahoney 2) % SB_ONDISK_JOURNAL_SIZE(sb); 41501da177e4SLinus Torvalds atomic_set(&(journal->j_wcount), 0); 41511da177e4SLinus Torvalds journal->j_bcount = 0; 41521da177e4SLinus Torvalds journal->j_last = NULL; 41531da177e4SLinus Torvalds journal->j_first = NULL; 41541da177e4SLinus Torvalds journal->j_len = 0; 41551da177e4SLinus Torvalds journal->j_trans_start_time = 0; 4156a44c94a7SAlexander Zarochentsev /* check for trans_id overflow */ 4157a44c94a7SAlexander Zarochentsev if (++journal->j_trans_id == 0) 4158a44c94a7SAlexander Zarochentsev journal->j_trans_id = 10; 41591da177e4SLinus Torvalds journal->j_current_jl->j_trans_id = journal->j_trans_id; 41601da177e4SLinus Torvalds journal->j_must_wait = 0; 41611da177e4SLinus Torvalds journal->j_len_alloc = 0; 41621da177e4SLinus Torvalds journal->j_next_full_flush = 0; 41631da177e4SLinus Torvalds journal->j_next_async_flush = 0; 4164a9dd3643SJeff Mahoney init_journal_hash(sb); 41651da177e4SLinus Torvalds 41661da177e4SLinus Torvalds // make sure reiserfs_add_jh sees the new current_jl before we 41671da177e4SLinus Torvalds // write out the tails 41681da177e4SLinus Torvalds smp_mb(); 41691da177e4SLinus Torvalds 41701da177e4SLinus Torvalds /* tail conversion targets have to hit the disk before we end the 41711da177e4SLinus Torvalds * transaction. Otherwise a later transaction might repack the tail 41721da177e4SLinus Torvalds * before this transaction commits, leaving the data block unflushed and 41731da177e4SLinus Torvalds * clean, if we crash before the later transaction commits, the data block 41741da177e4SLinus Torvalds * is lost. 41751da177e4SLinus Torvalds */ 41761da177e4SLinus Torvalds if (!list_empty(&jl->j_tail_bh_list)) { 41778ebc4232SFrederic Weisbecker reiserfs_write_unlock(sb); 41781da177e4SLinus Torvalds write_ordered_buffers(&journal->j_dirty_buffers_lock, 41791da177e4SLinus Torvalds journal, jl, &jl->j_tail_bh_list); 41808ebc4232SFrederic Weisbecker reiserfs_write_lock(sb); 41811da177e4SLinus Torvalds } 418214a61442SEric Sesterhenn BUG_ON(!list_empty(&jl->j_tail_bh_list)); 418390415deaSJeff Mahoney mutex_unlock(&jl->j_commit_mutex); 41841da177e4SLinus Torvalds 41851da177e4SLinus Torvalds /* honor the flush wishes from the caller, simple commits can 41861da177e4SLinus Torvalds ** be done outside the journal lock, they are done below 41871da177e4SLinus Torvalds ** 41881da177e4SLinus Torvalds ** if we don't flush the commit list right now, we put it into 41891da177e4SLinus Torvalds ** the work queue so the people waiting on the async progress work 41901da177e4SLinus Torvalds ** queue don't wait for this proc to flush journal lists and such. 41911da177e4SLinus Torvalds */ 41921da177e4SLinus Torvalds if (flush) { 4193a9dd3643SJeff Mahoney flush_commit_list(sb, jl, 1); 4194a9dd3643SJeff Mahoney flush_journal_list(sb, jl, 1); 41951da177e4SLinus Torvalds } else if (!(jl->j_state & LIST_COMMIT_PENDING)) 41961da177e4SLinus Torvalds queue_delayed_work(commit_wq, &journal->j_work, HZ / 10); 41971da177e4SLinus Torvalds 41981da177e4SLinus Torvalds /* if the next transaction has any chance of wrapping, flush 41991da177e4SLinus Torvalds ** transactions that might get overwritten. If any journal lists are very 42001da177e4SLinus Torvalds ** old flush them as well. 42011da177e4SLinus Torvalds */ 42021da177e4SLinus Torvalds first_jl: 42031da177e4SLinus Torvalds list_for_each_safe(entry, safe, &journal->j_journal_list) { 42041da177e4SLinus Torvalds temp_jl = JOURNAL_LIST_ENTRY(entry); 42051da177e4SLinus Torvalds if (journal->j_start <= temp_jl->j_start) { 42061da177e4SLinus Torvalds if ((journal->j_start + journal->j_trans_max + 1) >= 4207bd4c625cSLinus Torvalds temp_jl->j_start) { 4208a9dd3643SJeff Mahoney flush_used_journal_lists(sb, temp_jl); 42091da177e4SLinus Torvalds goto first_jl; 42101da177e4SLinus Torvalds } else if ((journal->j_start + 42111da177e4SLinus Torvalds journal->j_trans_max + 1) < 4212a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb)) { 42131da177e4SLinus Torvalds /* if we don't cross into the next transaction and we don't 42141da177e4SLinus Torvalds * wrap, there is no way we can overlap any later transactions 42151da177e4SLinus Torvalds * break now 42161da177e4SLinus Torvalds */ 42171da177e4SLinus Torvalds break; 42181da177e4SLinus Torvalds } 42191da177e4SLinus Torvalds } else if ((journal->j_start + 42201da177e4SLinus Torvalds journal->j_trans_max + 1) > 4221a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb)) { 42221da177e4SLinus Torvalds if (((journal->j_start + journal->j_trans_max + 1) % 4223a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb)) >= 4224bd4c625cSLinus Torvalds temp_jl->j_start) { 4225a9dd3643SJeff Mahoney flush_used_journal_lists(sb, temp_jl); 42261da177e4SLinus Torvalds goto first_jl; 42271da177e4SLinus Torvalds } else { 42281da177e4SLinus Torvalds /* we don't overlap anything from out start to the end of the 42291da177e4SLinus Torvalds * log, and our wrapped portion doesn't overlap anything at 42301da177e4SLinus Torvalds * the start of the log. We can break 42311da177e4SLinus Torvalds */ 42321da177e4SLinus Torvalds break; 42331da177e4SLinus Torvalds } 42341da177e4SLinus Torvalds } 42351da177e4SLinus Torvalds } 4236a9dd3643SJeff Mahoney flush_old_journal_lists(sb); 42371da177e4SLinus Torvalds 4238bd4c625cSLinus Torvalds journal->j_current_jl->j_list_bitmap = 4239a9dd3643SJeff Mahoney get_list_bitmap(sb, journal->j_current_jl); 42401da177e4SLinus Torvalds 42411da177e4SLinus Torvalds if (!(journal->j_current_jl->j_list_bitmap)) { 4242a9dd3643SJeff Mahoney reiserfs_panic(sb, "journal-1996", 4243c3a9c210SJeff Mahoney "could not get a list bitmap"); 42441da177e4SLinus Torvalds } 42451da177e4SLinus Torvalds 42461da177e4SLinus Torvalds atomic_set(&(journal->j_jlock), 0); 4247a9dd3643SJeff Mahoney unlock_journal(sb); 42481da177e4SLinus Torvalds /* wake up any body waiting to join. */ 42491da177e4SLinus Torvalds clear_bit(J_WRITERS_QUEUED, &journal->j_state); 42501da177e4SLinus Torvalds wake_up(&(journal->j_join_wait)); 42511da177e4SLinus Torvalds 42521da177e4SLinus Torvalds if (!flush && wait_on_commit && 4253a9dd3643SJeff Mahoney journal_list_still_alive(sb, commit_trans_id)) { 4254a9dd3643SJeff Mahoney flush_commit_list(sb, jl, 1); 42551da177e4SLinus Torvalds } 42561da177e4SLinus Torvalds out: 4257a9dd3643SJeff Mahoney reiserfs_check_lock_depth(sb, "journal end2"); 42581da177e4SLinus Torvalds 42591da177e4SLinus Torvalds memset(th, 0, sizeof(*th)); 42601da177e4SLinus Torvalds /* Re-set th->t_super, so we can properly keep track of how many 42611da177e4SLinus Torvalds * persistent transactions there are. We need to do this so if this 42621da177e4SLinus Torvalds * call is part of a failed restart_transaction, we can free it later */ 4263a9dd3643SJeff Mahoney th->t_super = sb; 42641da177e4SLinus Torvalds 42651da177e4SLinus Torvalds return journal->j_errno; 42661da177e4SLinus Torvalds } 42671da177e4SLinus Torvalds 426832e8b106SJeff Mahoney /* Send the file system read only and refuse new transactions */ 426932e8b106SJeff Mahoney void reiserfs_abort_journal(struct super_block *sb, int errno) 42701da177e4SLinus Torvalds { 42711da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(sb); 42721da177e4SLinus Torvalds if (test_bit(J_ABORTED, &journal->j_state)) 42731da177e4SLinus Torvalds return; 42741da177e4SLinus Torvalds 427532e8b106SJeff Mahoney if (!journal->j_errno) 427632e8b106SJeff Mahoney journal->j_errno = errno; 42771da177e4SLinus Torvalds 42781da177e4SLinus Torvalds sb->s_flags |= MS_RDONLY; 42791da177e4SLinus Torvalds set_bit(J_ABORTED, &journal->j_state); 42801da177e4SLinus Torvalds 42811da177e4SLinus Torvalds #ifdef CONFIG_REISERFS_CHECK 42821da177e4SLinus Torvalds dump_stack(); 42831da177e4SLinus Torvalds #endif 42841da177e4SLinus Torvalds } 4285