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); 1004385bab1SAl Viro static void 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)) { 950278f6679SJeff Mahoney int depth; 951278f6679SJeff Mahoney 952278f6679SJeff Mahoney depth = reiserfs_write_unlock_nested(s); 9538aa7e847SJens Axboe congestion_wait(BLK_RW_ASYNC, HZ / 10); 954278f6679SJeff Mahoney reiserfs_write_lock_nested(s, depth); 9558ebc4232SFrederic Weisbecker } 9568ebc4232SFrederic Weisbecker 9571da177e4SLinus Torvalds return 0; 9581da177e4SLinus Torvalds } 9591da177e4SLinus Torvalds 9601da177e4SLinus Torvalds /* 9611da177e4SLinus Torvalds ** if this journal list still has commit blocks unflushed, send them to disk. 9621da177e4SLinus Torvalds ** 9631da177e4SLinus Torvalds ** log areas must be flushed in order (transaction 2 can't commit before transaction 1) 9641da177e4SLinus Torvalds ** Before the commit block can by written, every other log block must be safely on disk 9651da177e4SLinus Torvalds ** 9661da177e4SLinus Torvalds */ 967bd4c625cSLinus Torvalds static int flush_commit_list(struct super_block *s, 968bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl, int flushall) 969bd4c625cSLinus Torvalds { 9701da177e4SLinus Torvalds int i; 9713ee16670SJeff Mahoney b_blocknr_t bn; 9721da177e4SLinus Torvalds struct buffer_head *tbh = NULL; 973600ed416SJeff Mahoney unsigned int trans_id = jl->j_trans_id; 9741da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 9751da177e4SLinus Torvalds int retval = 0; 976e0e851cfSChris Mason int write_len; 977278f6679SJeff Mahoney int depth; 9781da177e4SLinus Torvalds 9791da177e4SLinus Torvalds reiserfs_check_lock_depth(s, "flush_commit_list"); 9801da177e4SLinus Torvalds 9811da177e4SLinus Torvalds if (atomic_read(&jl->j_older_commits_done)) { 9821da177e4SLinus Torvalds return 0; 9831da177e4SLinus Torvalds } 9841da177e4SLinus Torvalds 9851da177e4SLinus Torvalds /* before we can put our commit blocks on disk, we have to make sure everyone older than 9861da177e4SLinus Torvalds ** us is on disk too 9871da177e4SLinus Torvalds */ 9881da177e4SLinus Torvalds BUG_ON(jl->j_len <= 0); 9891da177e4SLinus Torvalds BUG_ON(trans_id == journal->j_trans_id); 9901da177e4SLinus Torvalds 9911da177e4SLinus Torvalds get_journal_list(jl); 9921da177e4SLinus Torvalds if (flushall) { 9931da177e4SLinus Torvalds if (flush_older_commits(s, jl) == 1) { 9941da177e4SLinus Torvalds /* list disappeared during flush_older_commits. return */ 9951da177e4SLinus Torvalds goto put_jl; 9961da177e4SLinus Torvalds } 9971da177e4SLinus Torvalds } 9981da177e4SLinus Torvalds 9991da177e4SLinus Torvalds /* make sure nobody is trying to flush this one at the same time */ 10008ebc4232SFrederic Weisbecker reiserfs_mutex_lock_safe(&jl->j_commit_mutex, s); 10018ebc4232SFrederic Weisbecker 10021da177e4SLinus Torvalds if (!journal_list_still_alive(s, trans_id)) { 100390415deaSJeff Mahoney mutex_unlock(&jl->j_commit_mutex); 10041da177e4SLinus Torvalds goto put_jl; 10051da177e4SLinus Torvalds } 10061da177e4SLinus Torvalds BUG_ON(jl->j_trans_id == 0); 10071da177e4SLinus Torvalds 10081da177e4SLinus Torvalds /* this commit is done, exit */ 10091da177e4SLinus Torvalds if (atomic_read(&(jl->j_commit_left)) <= 0) { 10101da177e4SLinus Torvalds if (flushall) { 10111da177e4SLinus Torvalds atomic_set(&(jl->j_older_commits_done), 1); 10121da177e4SLinus Torvalds } 101390415deaSJeff Mahoney mutex_unlock(&jl->j_commit_mutex); 10141da177e4SLinus Torvalds goto put_jl; 10151da177e4SLinus Torvalds } 10161da177e4SLinus Torvalds 10171da177e4SLinus Torvalds if (!list_empty(&jl->j_bh_list)) { 10183d4492f8SChris Mason int ret; 10198ebc4232SFrederic Weisbecker 10208ebc4232SFrederic Weisbecker /* 10218ebc4232SFrederic Weisbecker * We might sleep in numerous places inside 10228ebc4232SFrederic Weisbecker * write_ordered_buffers. Relax the write lock. 10238ebc4232SFrederic Weisbecker */ 1024278f6679SJeff Mahoney depth = reiserfs_write_unlock_nested(s); 10253d4492f8SChris Mason ret = write_ordered_buffers(&journal->j_dirty_buffers_lock, 10261da177e4SLinus Torvalds journal, jl, &jl->j_bh_list); 10273d4492f8SChris Mason if (ret < 0 && retval == 0) 10283d4492f8SChris Mason retval = ret; 1029278f6679SJeff Mahoney reiserfs_write_lock_nested(s, depth); 10301da177e4SLinus Torvalds } 10311da177e4SLinus Torvalds BUG_ON(!list_empty(&jl->j_bh_list)); 10321da177e4SLinus Torvalds /* 10331da177e4SLinus Torvalds * for the description block and all the log blocks, submit any buffers 1034e0e851cfSChris Mason * that haven't already reached the disk. Try to write at least 256 1035e0e851cfSChris Mason * log blocks. later on, we will only wait on blocks that correspond 1036e0e851cfSChris Mason * to this transaction, but while we're unplugging we might as well 1037e0e851cfSChris Mason * get a chunk of data on there. 10381da177e4SLinus Torvalds */ 10391da177e4SLinus Torvalds atomic_inc(&journal->j_async_throttle); 1040e0e851cfSChris Mason write_len = jl->j_len + 1; 1041e0e851cfSChris Mason if (write_len < 256) 1042e0e851cfSChris Mason write_len = 256; 1043e0e851cfSChris Mason for (i = 0 ; i < write_len ; i++) { 10441da177e4SLinus Torvalds bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + (jl->j_start + i) % 10451da177e4SLinus Torvalds SB_ONDISK_JOURNAL_SIZE(s); 10461da177e4SLinus Torvalds tbh = journal_find_get_block(s, bn); 1047e0e851cfSChris Mason if (tbh) { 10486e3647acSFrederic Weisbecker if (buffer_dirty(tbh)) { 1049278f6679SJeff Mahoney depth = reiserfs_write_unlock_nested(s); 1050e0e851cfSChris Mason ll_rw_block(WRITE, 1, &tbh); 1051278f6679SJeff Mahoney reiserfs_write_lock_nested(s, depth); 10526e3647acSFrederic Weisbecker } 10531da177e4SLinus Torvalds put_bh(tbh) ; 10541da177e4SLinus Torvalds } 1055e0e851cfSChris Mason } 10561da177e4SLinus Torvalds atomic_dec(&journal->j_async_throttle); 10571da177e4SLinus Torvalds 10581da177e4SLinus Torvalds for (i = 0; i < (jl->j_len + 1); i++) { 10591da177e4SLinus Torvalds bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + 10601da177e4SLinus Torvalds (jl->j_start + i) % SB_ONDISK_JOURNAL_SIZE(s); 10611da177e4SLinus Torvalds tbh = journal_find_get_block(s, bn); 10628ebc4232SFrederic Weisbecker 1063278f6679SJeff Mahoney depth = reiserfs_write_unlock_nested(s); 1064278f6679SJeff Mahoney __wait_on_buffer(tbh); 1065278f6679SJeff Mahoney reiserfs_write_lock_nested(s, depth); 10661da177e4SLinus Torvalds // since we're using ll_rw_blk above, it might have skipped over 10671da177e4SLinus Torvalds // a locked buffer. Double check here 10681da177e4SLinus Torvalds // 10698ebc4232SFrederic Weisbecker /* redundant, sync_dirty_buffer() checks */ 10708ebc4232SFrederic Weisbecker if (buffer_dirty(tbh)) { 1071278f6679SJeff Mahoney depth = reiserfs_write_unlock_nested(s); 10721da177e4SLinus Torvalds sync_dirty_buffer(tbh); 1073278f6679SJeff Mahoney reiserfs_write_lock_nested(s, depth); 10748ebc4232SFrederic Weisbecker } 10751da177e4SLinus Torvalds if (unlikely(!buffer_uptodate(tbh))) { 10761da177e4SLinus Torvalds #ifdef CONFIG_REISERFS_CHECK 107745b03d5eSJeff Mahoney reiserfs_warning(s, "journal-601", 107845b03d5eSJeff Mahoney "buffer write failed"); 10791da177e4SLinus Torvalds #endif 10801da177e4SLinus Torvalds retval = -EIO; 10811da177e4SLinus Torvalds } 10821da177e4SLinus Torvalds put_bh(tbh); /* once for journal_find_get_block */ 10831da177e4SLinus Torvalds put_bh(tbh); /* once due to original getblk in do_journal_end */ 10841da177e4SLinus Torvalds atomic_dec(&(jl->j_commit_left)); 10851da177e4SLinus Torvalds } 10861da177e4SLinus Torvalds 10871da177e4SLinus Torvalds BUG_ON(atomic_read(&(jl->j_commit_left)) != 1); 10881da177e4SLinus Torvalds 10895d5e8156SJeff Mahoney /* If there was a write error in the journal - we can't commit 10905d5e8156SJeff Mahoney * this transaction - it will be invalid and, if successful, 1091beb7dd86SRobert P. J. Day * will just end up propagating the write error out to 10925d5e8156SJeff Mahoney * the file system. */ 10935d5e8156SJeff Mahoney if (likely(!retval && !reiserfs_is_journal_aborted (journal))) { 10941da177e4SLinus Torvalds if (buffer_dirty(jl->j_commit_bh)) 10951da177e4SLinus Torvalds BUG(); 10961da177e4SLinus Torvalds mark_buffer_dirty(jl->j_commit_bh) ; 1097278f6679SJeff Mahoney depth = reiserfs_write_unlock_nested(s); 10987cd33ad2SChristoph Hellwig if (reiserfs_barrier_flush(s)) 10997cd33ad2SChristoph Hellwig __sync_dirty_buffer(jl->j_commit_bh, WRITE_FLUSH_FUA); 11007cd33ad2SChristoph Hellwig else 11011da177e4SLinus Torvalds sync_dirty_buffer(jl->j_commit_bh); 1102278f6679SJeff Mahoney reiserfs_write_lock_nested(s, depth); 11035d5e8156SJeff Mahoney } 11041da177e4SLinus Torvalds 11051da177e4SLinus Torvalds /* If there was a write error in the journal - we can't commit this 11061da177e4SLinus Torvalds * transaction - it will be invalid and, if successful, will just end 1107beb7dd86SRobert P. J. Day * up propagating the write error out to the filesystem. */ 11081da177e4SLinus Torvalds if (unlikely(!buffer_uptodate(jl->j_commit_bh))) { 11091da177e4SLinus Torvalds #ifdef CONFIG_REISERFS_CHECK 111045b03d5eSJeff Mahoney reiserfs_warning(s, "journal-615", "buffer write failed"); 11111da177e4SLinus Torvalds #endif 11121da177e4SLinus Torvalds retval = -EIO; 11131da177e4SLinus Torvalds } 11141da177e4SLinus Torvalds bforget(jl->j_commit_bh); 11151da177e4SLinus Torvalds if (journal->j_last_commit_id != 0 && 11161da177e4SLinus Torvalds (jl->j_trans_id - journal->j_last_commit_id) != 1) { 111745b03d5eSJeff Mahoney reiserfs_warning(s, "clm-2200", "last commit %lu, current %lu", 1118bd4c625cSLinus Torvalds journal->j_last_commit_id, jl->j_trans_id); 11191da177e4SLinus Torvalds } 11201da177e4SLinus Torvalds journal->j_last_commit_id = jl->j_trans_id; 11211da177e4SLinus Torvalds 11221da177e4SLinus Torvalds /* now, every commit block is on the disk. It is safe to allow blocks freed during this transaction to be reallocated */ 11231da177e4SLinus Torvalds cleanup_freed_for_journal_list(s, jl); 11241da177e4SLinus Torvalds 11251da177e4SLinus Torvalds retval = retval ? retval : journal->j_errno; 11261da177e4SLinus Torvalds 11271da177e4SLinus Torvalds /* mark the metadata dirty */ 11281da177e4SLinus Torvalds if (!retval) 11291da177e4SLinus Torvalds dirty_one_transaction(s, jl); 11301da177e4SLinus Torvalds atomic_dec(&(jl->j_commit_left)); 11311da177e4SLinus Torvalds 11321da177e4SLinus Torvalds if (flushall) { 11331da177e4SLinus Torvalds atomic_set(&(jl->j_older_commits_done), 1); 11341da177e4SLinus Torvalds } 113590415deaSJeff Mahoney mutex_unlock(&jl->j_commit_mutex); 11361da177e4SLinus Torvalds put_jl: 11371da177e4SLinus Torvalds put_journal_list(s, jl); 11381da177e4SLinus Torvalds 11391da177e4SLinus Torvalds if (retval) 1140bd4c625cSLinus Torvalds reiserfs_abort(s, retval, "Journal write error in %s", 1141fbe5498bSHarvey Harrison __func__); 11421da177e4SLinus Torvalds return retval; 11431da177e4SLinus Torvalds } 11441da177e4SLinus Torvalds 11451da177e4SLinus Torvalds /* 11461da177e4SLinus Torvalds ** flush_journal_list frequently needs to find a newer transaction for a given block. This does that, or 11471da177e4SLinus Torvalds ** returns NULL if it can't find anything 11481da177e4SLinus Torvalds */ 1149bd4c625cSLinus Torvalds static struct reiserfs_journal_list *find_newer_jl_for_cn(struct 1150bd4c625cSLinus Torvalds reiserfs_journal_cnode 1151bd4c625cSLinus Torvalds *cn) 1152bd4c625cSLinus Torvalds { 11531da177e4SLinus Torvalds struct super_block *sb = cn->sb; 11541da177e4SLinus Torvalds b_blocknr_t blocknr = cn->blocknr; 11551da177e4SLinus Torvalds 11561da177e4SLinus Torvalds cn = cn->hprev; 11571da177e4SLinus Torvalds while (cn) { 11581da177e4SLinus Torvalds if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist) { 11591da177e4SLinus Torvalds return cn->jlist; 11601da177e4SLinus Torvalds } 11611da177e4SLinus Torvalds cn = cn->hprev; 11621da177e4SLinus Torvalds } 11631da177e4SLinus Torvalds return NULL; 11641da177e4SLinus Torvalds } 11651da177e4SLinus Torvalds 1166a3172027SChris Mason static int newer_jl_done(struct reiserfs_journal_cnode *cn) 1167a3172027SChris Mason { 1168a3172027SChris Mason struct super_block *sb = cn->sb; 1169a3172027SChris Mason b_blocknr_t blocknr = cn->blocknr; 1170a3172027SChris Mason 1171a3172027SChris Mason cn = cn->hprev; 1172a3172027SChris Mason while (cn) { 1173a3172027SChris Mason if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist && 1174a3172027SChris Mason atomic_read(&cn->jlist->j_commit_left) != 0) 1175a3172027SChris Mason return 0; 1176a3172027SChris Mason cn = cn->hprev; 1177a3172027SChris Mason } 1178a3172027SChris Mason return 1; 1179a3172027SChris Mason } 1180a3172027SChris Mason 1181bd4c625cSLinus Torvalds static void remove_journal_hash(struct super_block *, 1182bd4c625cSLinus Torvalds struct reiserfs_journal_cnode **, 1183bd4c625cSLinus Torvalds struct reiserfs_journal_list *, unsigned long, 1184bd4c625cSLinus Torvalds int); 11851da177e4SLinus Torvalds 11861da177e4SLinus Torvalds /* 11871da177e4SLinus Torvalds ** once all the real blocks have been flushed, it is safe to remove them from the 11881da177e4SLinus Torvalds ** journal list for this transaction. Aside from freeing the cnode, this also allows the 11891da177e4SLinus Torvalds ** block to be reallocated for data blocks if it had been deleted. 11901da177e4SLinus Torvalds */ 1191a9dd3643SJeff Mahoney static void remove_all_from_journal_list(struct super_block *sb, 1192bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl, 1193bd4c625cSLinus Torvalds int debug) 1194bd4c625cSLinus Torvalds { 1195a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 11961da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn, *last; 11971da177e4SLinus Torvalds cn = jl->j_realblock; 11981da177e4SLinus Torvalds 11991da177e4SLinus Torvalds /* which is better, to lock once around the whole loop, or 12001da177e4SLinus Torvalds ** to lock for each call to remove_journal_hash? 12011da177e4SLinus Torvalds */ 12021da177e4SLinus Torvalds while (cn) { 12031da177e4SLinus Torvalds if (cn->blocknr != 0) { 12041da177e4SLinus Torvalds if (debug) { 1205a9dd3643SJeff Mahoney reiserfs_warning(sb, "reiserfs-2201", 1206bd4c625cSLinus Torvalds "block %u, bh is %d, state %ld", 1207bd4c625cSLinus Torvalds cn->blocknr, cn->bh ? 1 : 0, 1208bd4c625cSLinus Torvalds cn->state); 12091da177e4SLinus Torvalds } 12101da177e4SLinus Torvalds cn->state = 0; 1211a9dd3643SJeff Mahoney remove_journal_hash(sb, journal->j_list_hash_table, 1212bd4c625cSLinus Torvalds jl, cn->blocknr, 1); 12131da177e4SLinus Torvalds } 12141da177e4SLinus Torvalds last = cn; 12151da177e4SLinus Torvalds cn = cn->next; 1216a9dd3643SJeff Mahoney free_cnode(sb, last); 12171da177e4SLinus Torvalds } 12181da177e4SLinus Torvalds jl->j_realblock = NULL; 12191da177e4SLinus Torvalds } 12201da177e4SLinus Torvalds 12211da177e4SLinus Torvalds /* 12221da177e4SLinus Torvalds ** if this timestamp is greater than the timestamp we wrote last to the header block, write it to the header block. 12231da177e4SLinus Torvalds ** once this is done, I can safely say the log area for this transaction won't ever be replayed, and I can start 12241da177e4SLinus Torvalds ** releasing blocks in this transaction for reuse as data blocks. 12251da177e4SLinus Torvalds ** called by flush_journal_list, before it calls remove_all_from_journal_list 12261da177e4SLinus Torvalds ** 12271da177e4SLinus Torvalds */ 1228a9dd3643SJeff Mahoney static int _update_journal_header_block(struct super_block *sb, 1229bd4c625cSLinus Torvalds unsigned long offset, 1230600ed416SJeff Mahoney unsigned int trans_id) 1231bd4c625cSLinus Torvalds { 12321da177e4SLinus Torvalds struct reiserfs_journal_header *jh; 1233a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 1234278f6679SJeff Mahoney int depth; 12351da177e4SLinus Torvalds 12361da177e4SLinus Torvalds if (reiserfs_is_journal_aborted(journal)) 12371da177e4SLinus Torvalds return -EIO; 12381da177e4SLinus Torvalds 12391da177e4SLinus Torvalds if (trans_id >= journal->j_last_flush_trans_id) { 12401da177e4SLinus Torvalds if (buffer_locked((journal->j_header_bh))) { 1241278f6679SJeff Mahoney depth = reiserfs_write_unlock_nested(sb); 1242278f6679SJeff Mahoney __wait_on_buffer(journal->j_header_bh); 1243278f6679SJeff Mahoney reiserfs_write_lock_nested(sb, depth); 12441da177e4SLinus Torvalds if (unlikely(!buffer_uptodate(journal->j_header_bh))) { 12451da177e4SLinus Torvalds #ifdef CONFIG_REISERFS_CHECK 1246a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-699", 124745b03d5eSJeff Mahoney "buffer write failed"); 12481da177e4SLinus Torvalds #endif 12491da177e4SLinus Torvalds return -EIO; 12501da177e4SLinus Torvalds } 12511da177e4SLinus Torvalds } 12521da177e4SLinus Torvalds journal->j_last_flush_trans_id = trans_id; 12531da177e4SLinus Torvalds journal->j_first_unflushed_offset = offset; 1254bd4c625cSLinus Torvalds jh = (struct reiserfs_journal_header *)(journal->j_header_bh-> 1255bd4c625cSLinus Torvalds b_data); 12561da177e4SLinus Torvalds jh->j_last_flush_trans_id = cpu_to_le32(trans_id); 12571da177e4SLinus Torvalds jh->j_first_unflushed_offset = cpu_to_le32(offset); 12581da177e4SLinus Torvalds jh->j_mount_id = cpu_to_le32(journal->j_mount_id); 12591da177e4SLinus Torvalds 12601da177e4SLinus Torvalds set_buffer_dirty(journal->j_header_bh); 1261278f6679SJeff Mahoney depth = reiserfs_write_unlock_nested(sb); 12627cd33ad2SChristoph Hellwig 12637cd33ad2SChristoph Hellwig if (reiserfs_barrier_flush(sb)) 12647cd33ad2SChristoph Hellwig __sync_dirty_buffer(journal->j_header_bh, WRITE_FLUSH_FUA); 12657cd33ad2SChristoph Hellwig else 12661da177e4SLinus Torvalds sync_dirty_buffer(journal->j_header_bh); 12677cd33ad2SChristoph Hellwig 1268278f6679SJeff Mahoney reiserfs_write_lock_nested(sb, depth); 12691da177e4SLinus Torvalds if (!buffer_uptodate(journal->j_header_bh)) { 1270a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-837", 127145b03d5eSJeff Mahoney "IO error during journal replay"); 12721da177e4SLinus Torvalds return -EIO; 12731da177e4SLinus Torvalds } 12741da177e4SLinus Torvalds } 12751da177e4SLinus Torvalds return 0; 12761da177e4SLinus Torvalds } 12771da177e4SLinus Torvalds 1278a9dd3643SJeff Mahoney static int update_journal_header_block(struct super_block *sb, 12791da177e4SLinus Torvalds unsigned long offset, 1280600ed416SJeff Mahoney unsigned int trans_id) 1281bd4c625cSLinus Torvalds { 1282a9dd3643SJeff Mahoney return _update_journal_header_block(sb, offset, trans_id); 12831da177e4SLinus Torvalds } 1284bd4c625cSLinus Torvalds 12851da177e4SLinus Torvalds /* 12861da177e4SLinus Torvalds ** flush any and all journal lists older than you are 12871da177e4SLinus Torvalds ** can only be called from flush_journal_list 12881da177e4SLinus Torvalds */ 1289a9dd3643SJeff Mahoney static int flush_older_journal_lists(struct super_block *sb, 12901da177e4SLinus Torvalds struct reiserfs_journal_list *jl) 12911da177e4SLinus Torvalds { 12921da177e4SLinus Torvalds struct list_head *entry; 12931da177e4SLinus Torvalds struct reiserfs_journal_list *other_jl; 1294a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 1295600ed416SJeff Mahoney unsigned int trans_id = jl->j_trans_id; 12961da177e4SLinus Torvalds 12971da177e4SLinus Torvalds /* we know we are the only ones flushing things, no extra race 12981da177e4SLinus Torvalds * protection is required. 12991da177e4SLinus Torvalds */ 13001da177e4SLinus Torvalds restart: 13011da177e4SLinus Torvalds entry = journal->j_journal_list.next; 13021da177e4SLinus Torvalds /* Did we wrap? */ 13031da177e4SLinus Torvalds if (entry == &journal->j_journal_list) 13041da177e4SLinus Torvalds return 0; 13051da177e4SLinus Torvalds other_jl = JOURNAL_LIST_ENTRY(entry); 13061da177e4SLinus Torvalds if (other_jl->j_trans_id < trans_id) { 13071da177e4SLinus Torvalds BUG_ON(other_jl->j_refcount <= 0); 13081da177e4SLinus Torvalds /* do not flush all */ 1309a9dd3643SJeff Mahoney flush_journal_list(sb, other_jl, 0); 13101da177e4SLinus Torvalds 13111da177e4SLinus Torvalds /* other_jl is now deleted from the list */ 13121da177e4SLinus Torvalds goto restart; 13131da177e4SLinus Torvalds } 13141da177e4SLinus Torvalds return 0; 13151da177e4SLinus Torvalds } 13161da177e4SLinus Torvalds 13171da177e4SLinus Torvalds static void del_from_work_list(struct super_block *s, 1318bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl) 1319bd4c625cSLinus Torvalds { 13201da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 13211da177e4SLinus Torvalds if (!list_empty(&jl->j_working_list)) { 13221da177e4SLinus Torvalds list_del_init(&jl->j_working_list); 13231da177e4SLinus Torvalds journal->j_num_work_lists--; 13241da177e4SLinus Torvalds } 13251da177e4SLinus Torvalds } 13261da177e4SLinus Torvalds 13271da177e4SLinus Torvalds /* flush a journal list, both commit and real blocks 13281da177e4SLinus Torvalds ** 13291da177e4SLinus Torvalds ** always set flushall to 1, unless you are calling from inside 13301da177e4SLinus Torvalds ** flush_journal_list 13311da177e4SLinus Torvalds ** 13321da177e4SLinus Torvalds ** IMPORTANT. This can only be called while there are no journal writers, 13331da177e4SLinus Torvalds ** and the journal is locked. That means it can only be called from 13341da177e4SLinus Torvalds ** do_journal_end, or by journal_release 13351da177e4SLinus Torvalds */ 13361da177e4SLinus Torvalds static int flush_journal_list(struct super_block *s, 1337bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl, int flushall) 1338bd4c625cSLinus Torvalds { 13391da177e4SLinus Torvalds struct reiserfs_journal_list *pjl; 13401da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn, *last; 13411da177e4SLinus Torvalds int count; 13421da177e4SLinus Torvalds int was_jwait = 0; 13431da177e4SLinus Torvalds int was_dirty = 0; 13441da177e4SLinus Torvalds struct buffer_head *saved_bh; 13451da177e4SLinus Torvalds unsigned long j_len_saved = jl->j_len; 13461da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 13471da177e4SLinus Torvalds int err = 0; 1348278f6679SJeff Mahoney int depth; 13491da177e4SLinus Torvalds 13501da177e4SLinus Torvalds BUG_ON(j_len_saved <= 0); 13511da177e4SLinus Torvalds 13521da177e4SLinus Torvalds if (atomic_read(&journal->j_wcount) != 0) { 135345b03d5eSJeff Mahoney reiserfs_warning(s, "clm-2048", "called with wcount %d", 13541da177e4SLinus Torvalds atomic_read(&journal->j_wcount)); 13551da177e4SLinus Torvalds } 13561da177e4SLinus Torvalds BUG_ON(jl->j_trans_id == 0); 13571da177e4SLinus Torvalds 13581da177e4SLinus Torvalds /* if flushall == 0, the lock is already held */ 13591da177e4SLinus Torvalds if (flushall) { 13608ebc4232SFrederic Weisbecker reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s); 1361afe70259SJeff Mahoney } else if (mutex_trylock(&journal->j_flush_mutex)) { 13621da177e4SLinus Torvalds BUG(); 13631da177e4SLinus Torvalds } 13641da177e4SLinus Torvalds 13651da177e4SLinus Torvalds count = 0; 13661da177e4SLinus Torvalds if (j_len_saved > journal->j_trans_max) { 1367c3a9c210SJeff Mahoney reiserfs_panic(s, "journal-715", "length is %lu, trans id %lu", 1368bd4c625cSLinus Torvalds j_len_saved, jl->j_trans_id); 13691da177e4SLinus Torvalds return 0; 13701da177e4SLinus Torvalds } 13711da177e4SLinus Torvalds 13721da177e4SLinus Torvalds /* if all the work is already done, get out of here */ 13731da177e4SLinus Torvalds if (atomic_read(&(jl->j_nonzerolen)) <= 0 && 13741da177e4SLinus Torvalds atomic_read(&(jl->j_commit_left)) <= 0) { 13751da177e4SLinus Torvalds goto flush_older_and_return; 13761da177e4SLinus Torvalds } 13771da177e4SLinus Torvalds 13781da177e4SLinus Torvalds /* start by putting the commit list on disk. This will also flush 13791da177e4SLinus Torvalds ** the commit lists of any olders transactions 13801da177e4SLinus Torvalds */ 13811da177e4SLinus Torvalds flush_commit_list(s, jl, 1); 13821da177e4SLinus Torvalds 1383bd4c625cSLinus Torvalds if (!(jl->j_state & LIST_DIRTY) 1384bd4c625cSLinus Torvalds && !reiserfs_is_journal_aborted(journal)) 13851da177e4SLinus Torvalds BUG(); 13861da177e4SLinus Torvalds 13871da177e4SLinus Torvalds /* are we done now? */ 13881da177e4SLinus Torvalds if (atomic_read(&(jl->j_nonzerolen)) <= 0 && 13891da177e4SLinus Torvalds atomic_read(&(jl->j_commit_left)) <= 0) { 13901da177e4SLinus Torvalds goto flush_older_and_return; 13911da177e4SLinus Torvalds } 13921da177e4SLinus Torvalds 13931da177e4SLinus Torvalds /* loop through each cnode, see if we need to write it, 13941da177e4SLinus Torvalds ** or wait on a more recent transaction, or just ignore it 13951da177e4SLinus Torvalds */ 13961da177e4SLinus Torvalds if (atomic_read(&(journal->j_wcount)) != 0) { 1397c3a9c210SJeff Mahoney reiserfs_panic(s, "journal-844", "journal list is flushing, " 1398c3a9c210SJeff Mahoney "wcount is not 0"); 13991da177e4SLinus Torvalds } 14001da177e4SLinus Torvalds cn = jl->j_realblock; 14011da177e4SLinus Torvalds while (cn) { 14021da177e4SLinus Torvalds was_jwait = 0; 14031da177e4SLinus Torvalds was_dirty = 0; 14041da177e4SLinus Torvalds saved_bh = NULL; 14051da177e4SLinus Torvalds /* blocknr of 0 is no longer in the hash, ignore it */ 14061da177e4SLinus Torvalds if (cn->blocknr == 0) { 14071da177e4SLinus Torvalds goto free_cnode; 14081da177e4SLinus Torvalds } 14091da177e4SLinus Torvalds 14101da177e4SLinus Torvalds /* This transaction failed commit. Don't write out to the disk */ 14111da177e4SLinus Torvalds if (!(jl->j_state & LIST_DIRTY)) 14121da177e4SLinus Torvalds goto free_cnode; 14131da177e4SLinus Torvalds 14141da177e4SLinus Torvalds pjl = find_newer_jl_for_cn(cn); 14151da177e4SLinus Torvalds /* the order is important here. We check pjl to make sure we 14161da177e4SLinus Torvalds ** don't clear BH_JDirty_wait if we aren't the one writing this 14171da177e4SLinus Torvalds ** block to disk 14181da177e4SLinus Torvalds */ 14191da177e4SLinus Torvalds if (!pjl && cn->bh) { 14201da177e4SLinus Torvalds saved_bh = cn->bh; 14211da177e4SLinus Torvalds 14221da177e4SLinus Torvalds /* we do this to make sure nobody releases the buffer while 14231da177e4SLinus Torvalds ** we are working with it 14241da177e4SLinus Torvalds */ 14251da177e4SLinus Torvalds get_bh(saved_bh); 14261da177e4SLinus Torvalds 14271da177e4SLinus Torvalds if (buffer_journal_dirty(saved_bh)) { 14281da177e4SLinus Torvalds BUG_ON(!can_dirty(cn)); 14291da177e4SLinus Torvalds was_jwait = 1; 14301da177e4SLinus Torvalds was_dirty = 1; 14311da177e4SLinus Torvalds } else if (can_dirty(cn)) { 14321da177e4SLinus Torvalds /* everything with !pjl && jwait should be writable */ 14331da177e4SLinus Torvalds BUG(); 14341da177e4SLinus Torvalds } 14351da177e4SLinus Torvalds } 14361da177e4SLinus Torvalds 14371da177e4SLinus Torvalds /* if someone has this block in a newer transaction, just make 14380779bf2dSMatt LaPlante ** sure they are committed, and don't try writing it to disk 14391da177e4SLinus Torvalds */ 14401da177e4SLinus Torvalds if (pjl) { 14411da177e4SLinus Torvalds if (atomic_read(&pjl->j_commit_left)) 14421da177e4SLinus Torvalds flush_commit_list(s, pjl, 1); 14431da177e4SLinus Torvalds goto free_cnode; 14441da177e4SLinus Torvalds } 14451da177e4SLinus Torvalds 14461da177e4SLinus Torvalds /* bh == NULL when the block got to disk on its own, OR, 14471da177e4SLinus Torvalds ** the block got freed in a future transaction 14481da177e4SLinus Torvalds */ 14491da177e4SLinus Torvalds if (saved_bh == NULL) { 14501da177e4SLinus Torvalds goto free_cnode; 14511da177e4SLinus Torvalds } 14521da177e4SLinus Torvalds 14531da177e4SLinus Torvalds /* this should never happen. kupdate_one_transaction has this list 14541da177e4SLinus Torvalds ** locked while it works, so we should never see a buffer here that 14551da177e4SLinus Torvalds ** is not marked JDirty_wait 14561da177e4SLinus Torvalds */ 14571da177e4SLinus Torvalds if ((!was_jwait) && !buffer_locked(saved_bh)) { 145845b03d5eSJeff Mahoney reiserfs_warning(s, "journal-813", 145945b03d5eSJeff Mahoney "BAD! buffer %llu %cdirty %cjwait, " 14601da177e4SLinus Torvalds "not in a newer tranasction", 1461bd4c625cSLinus Torvalds (unsigned long long)saved_bh-> 1462bd4c625cSLinus Torvalds b_blocknr, was_dirty ? ' ' : '!', 1463bd4c625cSLinus Torvalds was_jwait ? ' ' : '!'); 14641da177e4SLinus Torvalds } 14651da177e4SLinus Torvalds if (was_dirty) { 14661da177e4SLinus Torvalds /* we inc again because saved_bh gets decremented at free_cnode */ 14671da177e4SLinus Torvalds get_bh(saved_bh); 14681da177e4SLinus Torvalds set_bit(BLOCK_NEEDS_FLUSH, &cn->state); 14691da177e4SLinus Torvalds lock_buffer(saved_bh); 14701da177e4SLinus Torvalds BUG_ON(cn->blocknr != saved_bh->b_blocknr); 14711da177e4SLinus Torvalds if (buffer_dirty(saved_bh)) 14721da177e4SLinus Torvalds submit_logged_buffer(saved_bh); 14731da177e4SLinus Torvalds else 14741da177e4SLinus Torvalds unlock_buffer(saved_bh); 14751da177e4SLinus Torvalds count++; 14761da177e4SLinus Torvalds } else { 147745b03d5eSJeff Mahoney reiserfs_warning(s, "clm-2082", 147845b03d5eSJeff Mahoney "Unable to flush buffer %llu in %s", 1479bd4c625cSLinus Torvalds (unsigned long long)saved_bh-> 1480fbe5498bSHarvey Harrison b_blocknr, __func__); 14811da177e4SLinus Torvalds } 14821da177e4SLinus Torvalds free_cnode: 14831da177e4SLinus Torvalds last = cn; 14841da177e4SLinus Torvalds cn = cn->next; 14851da177e4SLinus Torvalds if (saved_bh) { 14861da177e4SLinus Torvalds /* we incremented this to keep others from taking the buffer head away */ 14871da177e4SLinus Torvalds put_bh(saved_bh); 14881da177e4SLinus Torvalds if (atomic_read(&(saved_bh->b_count)) < 0) { 148945b03d5eSJeff Mahoney reiserfs_warning(s, "journal-945", 149045b03d5eSJeff Mahoney "saved_bh->b_count < 0"); 14911da177e4SLinus Torvalds } 14921da177e4SLinus Torvalds } 14931da177e4SLinus Torvalds } 14941da177e4SLinus Torvalds if (count > 0) { 14951da177e4SLinus Torvalds cn = jl->j_realblock; 14961da177e4SLinus Torvalds while (cn) { 14971da177e4SLinus Torvalds if (test_bit(BLOCK_NEEDS_FLUSH, &cn->state)) { 14981da177e4SLinus Torvalds if (!cn->bh) { 1499c3a9c210SJeff Mahoney reiserfs_panic(s, "journal-1011", 1500c3a9c210SJeff Mahoney "cn->bh is NULL"); 15011da177e4SLinus Torvalds } 15028ebc4232SFrederic Weisbecker 1503278f6679SJeff Mahoney depth = reiserfs_write_unlock_nested(s); 1504278f6679SJeff Mahoney __wait_on_buffer(cn->bh); 1505278f6679SJeff Mahoney reiserfs_write_lock_nested(s, depth); 15068ebc4232SFrederic Weisbecker 15071da177e4SLinus Torvalds if (!cn->bh) { 1508c3a9c210SJeff Mahoney reiserfs_panic(s, "journal-1012", 1509c3a9c210SJeff Mahoney "cn->bh is NULL"); 15101da177e4SLinus Torvalds } 15111da177e4SLinus Torvalds if (unlikely(!buffer_uptodate(cn->bh))) { 15121da177e4SLinus Torvalds #ifdef CONFIG_REISERFS_CHECK 151345b03d5eSJeff Mahoney reiserfs_warning(s, "journal-949", 151445b03d5eSJeff Mahoney "buffer write failed"); 15151da177e4SLinus Torvalds #endif 15161da177e4SLinus Torvalds err = -EIO; 15171da177e4SLinus Torvalds } 15181da177e4SLinus Torvalds /* note, we must clear the JDirty_wait bit after the up to date 15191da177e4SLinus Torvalds ** check, otherwise we race against our flushpage routine 15201da177e4SLinus Torvalds */ 1521bd4c625cSLinus Torvalds BUG_ON(!test_clear_buffer_journal_dirty 1522bd4c625cSLinus Torvalds (cn->bh)); 15231da177e4SLinus Torvalds 1524398c95bdSChris Mason /* drop one ref for us */ 15251da177e4SLinus Torvalds put_bh(cn->bh); 1526398c95bdSChris Mason /* drop one ref for journal_mark_dirty */ 1527398c95bdSChris Mason release_buffer_page(cn->bh); 15281da177e4SLinus Torvalds } 15291da177e4SLinus Torvalds cn = cn->next; 15301da177e4SLinus Torvalds } 15311da177e4SLinus Torvalds } 15321da177e4SLinus Torvalds 15331da177e4SLinus Torvalds if (err) 1534bd4c625cSLinus Torvalds reiserfs_abort(s, -EIO, 1535bd4c625cSLinus Torvalds "Write error while pushing transaction to disk in %s", 1536fbe5498bSHarvey Harrison __func__); 15371da177e4SLinus Torvalds flush_older_and_return: 15381da177e4SLinus Torvalds 15391da177e4SLinus Torvalds /* before we can update the journal header block, we _must_ flush all 15401da177e4SLinus Torvalds ** real blocks from all older transactions to disk. This is because 15411da177e4SLinus Torvalds ** once the header block is updated, this transaction will not be 15421da177e4SLinus Torvalds ** replayed after a crash 15431da177e4SLinus Torvalds */ 15441da177e4SLinus Torvalds if (flushall) { 15451da177e4SLinus Torvalds flush_older_journal_lists(s, jl); 15461da177e4SLinus Torvalds } 15471da177e4SLinus Torvalds 15481da177e4SLinus Torvalds err = journal->j_errno; 15491da177e4SLinus Torvalds /* before we can remove everything from the hash tables for this 15501da177e4SLinus Torvalds ** transaction, we must make sure it can never be replayed 15511da177e4SLinus Torvalds ** 15521da177e4SLinus Torvalds ** since we are only called from do_journal_end, we know for sure there 15531da177e4SLinus Torvalds ** are no allocations going on while we are flushing journal lists. So, 15541da177e4SLinus Torvalds ** we only need to update the journal header block for the last list 15551da177e4SLinus Torvalds ** being flushed 15561da177e4SLinus Torvalds */ 15571da177e4SLinus Torvalds if (!err && flushall) { 1558bd4c625cSLinus Torvalds err = 1559bd4c625cSLinus Torvalds update_journal_header_block(s, 1560bd4c625cSLinus Torvalds (jl->j_start + jl->j_len + 1561bd4c625cSLinus Torvalds 2) % SB_ONDISK_JOURNAL_SIZE(s), 1562bd4c625cSLinus Torvalds jl->j_trans_id); 15631da177e4SLinus Torvalds if (err) 1564bd4c625cSLinus Torvalds reiserfs_abort(s, -EIO, 1565bd4c625cSLinus Torvalds "Write error while updating journal header in %s", 1566fbe5498bSHarvey Harrison __func__); 15671da177e4SLinus Torvalds } 15681da177e4SLinus Torvalds remove_all_from_journal_list(s, jl, 0); 15691da177e4SLinus Torvalds list_del_init(&jl->j_list); 15701da177e4SLinus Torvalds journal->j_num_lists--; 15711da177e4SLinus Torvalds del_from_work_list(s, jl); 15721da177e4SLinus Torvalds 15731da177e4SLinus Torvalds if (journal->j_last_flush_id != 0 && 15741da177e4SLinus Torvalds (jl->j_trans_id - journal->j_last_flush_id) != 1) { 157545b03d5eSJeff Mahoney reiserfs_warning(s, "clm-2201", "last flush %lu, current %lu", 1576bd4c625cSLinus Torvalds journal->j_last_flush_id, jl->j_trans_id); 15771da177e4SLinus Torvalds } 15781da177e4SLinus Torvalds journal->j_last_flush_id = jl->j_trans_id; 15791da177e4SLinus Torvalds 15801da177e4SLinus Torvalds /* not strictly required since we are freeing the list, but it should 15811da177e4SLinus Torvalds * help find code using dead lists later on 15821da177e4SLinus Torvalds */ 15831da177e4SLinus Torvalds jl->j_len = 0; 15841da177e4SLinus Torvalds atomic_set(&(jl->j_nonzerolen), 0); 15851da177e4SLinus Torvalds jl->j_start = 0; 15861da177e4SLinus Torvalds jl->j_realblock = NULL; 15871da177e4SLinus Torvalds jl->j_commit_bh = NULL; 15881da177e4SLinus Torvalds jl->j_trans_id = 0; 15891da177e4SLinus Torvalds jl->j_state = 0; 15901da177e4SLinus Torvalds put_journal_list(s, jl); 15911da177e4SLinus Torvalds if (flushall) 1592afe70259SJeff Mahoney mutex_unlock(&journal->j_flush_mutex); 15931da177e4SLinus Torvalds return err; 15941da177e4SLinus Torvalds } 15951da177e4SLinus Torvalds 1596a3172027SChris Mason static int test_transaction(struct super_block *s, 1597a3172027SChris Mason struct reiserfs_journal_list *jl) 1598a3172027SChris Mason { 1599a3172027SChris Mason struct reiserfs_journal_cnode *cn; 1600a3172027SChris Mason 1601a3172027SChris Mason if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) 1602a3172027SChris Mason return 1; 1603a3172027SChris Mason 1604a3172027SChris Mason cn = jl->j_realblock; 1605a3172027SChris Mason while (cn) { 1606a3172027SChris Mason /* if the blocknr == 0, this has been cleared from the hash, 1607a3172027SChris Mason ** skip it 1608a3172027SChris Mason */ 1609a3172027SChris Mason if (cn->blocknr == 0) { 1610a3172027SChris Mason goto next; 1611a3172027SChris Mason } 1612a3172027SChris Mason if (cn->bh && !newer_jl_done(cn)) 1613a3172027SChris Mason return 0; 1614a3172027SChris Mason next: 1615a3172027SChris Mason cn = cn->next; 1616a3172027SChris Mason cond_resched(); 1617a3172027SChris Mason } 1618a3172027SChris Mason return 0; 1619a3172027SChris Mason } 1620a3172027SChris Mason 16211da177e4SLinus Torvalds static int write_one_transaction(struct super_block *s, 16221da177e4SLinus Torvalds struct reiserfs_journal_list *jl, 16231da177e4SLinus Torvalds struct buffer_chunk *chunk) 16241da177e4SLinus Torvalds { 16251da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 16261da177e4SLinus Torvalds int ret = 0; 16271da177e4SLinus Torvalds 16281da177e4SLinus Torvalds jl->j_state |= LIST_TOUCHED; 16291da177e4SLinus Torvalds del_from_work_list(s, jl); 16301da177e4SLinus Torvalds if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) { 16311da177e4SLinus Torvalds return 0; 16321da177e4SLinus Torvalds } 16331da177e4SLinus Torvalds 16341da177e4SLinus Torvalds cn = jl->j_realblock; 16351da177e4SLinus Torvalds while (cn) { 16361da177e4SLinus Torvalds /* if the blocknr == 0, this has been cleared from the hash, 16371da177e4SLinus Torvalds ** skip it 16381da177e4SLinus Torvalds */ 16391da177e4SLinus Torvalds if (cn->blocknr == 0) { 16401da177e4SLinus Torvalds goto next; 16411da177e4SLinus Torvalds } 16421da177e4SLinus Torvalds if (cn->bh && can_dirty(cn) && buffer_dirty(cn->bh)) { 16431da177e4SLinus Torvalds struct buffer_head *tmp_bh; 16441da177e4SLinus Torvalds /* we can race against journal_mark_freed when we try 16451da177e4SLinus Torvalds * to lock_buffer(cn->bh), so we have to inc the buffer 16461da177e4SLinus Torvalds * count, and recheck things after locking 16471da177e4SLinus Torvalds */ 16481da177e4SLinus Torvalds tmp_bh = cn->bh; 16491da177e4SLinus Torvalds get_bh(tmp_bh); 16501da177e4SLinus Torvalds lock_buffer(tmp_bh); 16511da177e4SLinus Torvalds if (cn->bh && can_dirty(cn) && buffer_dirty(tmp_bh)) { 16521da177e4SLinus Torvalds if (!buffer_journal_dirty(tmp_bh) || 16531da177e4SLinus Torvalds buffer_journal_prepared(tmp_bh)) 16541da177e4SLinus Torvalds BUG(); 16551da177e4SLinus Torvalds add_to_chunk(chunk, tmp_bh, NULL, write_chunk); 16561da177e4SLinus Torvalds ret++; 16571da177e4SLinus Torvalds } else { 16581da177e4SLinus Torvalds /* note, cn->bh might be null now */ 16591da177e4SLinus Torvalds unlock_buffer(tmp_bh); 16601da177e4SLinus Torvalds } 16611da177e4SLinus Torvalds put_bh(tmp_bh); 16621da177e4SLinus Torvalds } 16631da177e4SLinus Torvalds next: 16641da177e4SLinus Torvalds cn = cn->next; 16651da177e4SLinus Torvalds cond_resched(); 16661da177e4SLinus Torvalds } 16671da177e4SLinus Torvalds return ret; 16681da177e4SLinus Torvalds } 16691da177e4SLinus Torvalds 16701da177e4SLinus Torvalds /* used by flush_commit_list */ 16711da177e4SLinus Torvalds static int dirty_one_transaction(struct super_block *s, 16721da177e4SLinus Torvalds struct reiserfs_journal_list *jl) 16731da177e4SLinus Torvalds { 16741da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 16751da177e4SLinus Torvalds struct reiserfs_journal_list *pjl; 16761da177e4SLinus Torvalds int ret = 0; 16771da177e4SLinus Torvalds 16781da177e4SLinus Torvalds jl->j_state |= LIST_DIRTY; 16791da177e4SLinus Torvalds cn = jl->j_realblock; 16801da177e4SLinus Torvalds while (cn) { 16811da177e4SLinus Torvalds /* look for a more recent transaction that logged this 16821da177e4SLinus Torvalds ** buffer. Only the most recent transaction with a buffer in 16831da177e4SLinus Torvalds ** it is allowed to send that buffer to disk 16841da177e4SLinus Torvalds */ 16851da177e4SLinus Torvalds pjl = find_newer_jl_for_cn(cn); 1686bd4c625cSLinus Torvalds if (!pjl && cn->blocknr && cn->bh 1687bd4c625cSLinus Torvalds && buffer_journal_dirty(cn->bh)) { 16881da177e4SLinus Torvalds BUG_ON(!can_dirty(cn)); 16891da177e4SLinus Torvalds /* if the buffer is prepared, it will either be logged 16901da177e4SLinus Torvalds * or restored. If restored, we need to make sure 16911da177e4SLinus Torvalds * it actually gets marked dirty 16921da177e4SLinus Torvalds */ 16931da177e4SLinus Torvalds clear_buffer_journal_new(cn->bh); 16941da177e4SLinus Torvalds if (buffer_journal_prepared(cn->bh)) { 16951da177e4SLinus Torvalds set_buffer_journal_restore_dirty(cn->bh); 16961da177e4SLinus Torvalds } else { 16971da177e4SLinus Torvalds set_buffer_journal_test(cn->bh); 16981da177e4SLinus Torvalds mark_buffer_dirty(cn->bh); 16991da177e4SLinus Torvalds } 17001da177e4SLinus Torvalds } 17011da177e4SLinus Torvalds cn = cn->next; 17021da177e4SLinus Torvalds } 17031da177e4SLinus Torvalds return ret; 17041da177e4SLinus Torvalds } 17051da177e4SLinus Torvalds 17061da177e4SLinus Torvalds static int kupdate_transactions(struct super_block *s, 17071da177e4SLinus Torvalds struct reiserfs_journal_list *jl, 17081da177e4SLinus Torvalds struct reiserfs_journal_list **next_jl, 1709600ed416SJeff Mahoney unsigned int *next_trans_id, 1710bd4c625cSLinus Torvalds int num_blocks, int num_trans) 1711bd4c625cSLinus Torvalds { 17121da177e4SLinus Torvalds int ret = 0; 17131da177e4SLinus Torvalds int written = 0; 17141da177e4SLinus Torvalds int transactions_flushed = 0; 1715600ed416SJeff Mahoney unsigned int orig_trans_id = jl->j_trans_id; 17161da177e4SLinus Torvalds struct buffer_chunk chunk; 17171da177e4SLinus Torvalds struct list_head *entry; 17181da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 17191da177e4SLinus Torvalds chunk.nr = 0; 17201da177e4SLinus Torvalds 1721a412f9efSFrederic Weisbecker reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s); 17221da177e4SLinus Torvalds if (!journal_list_still_alive(s, orig_trans_id)) { 17231da177e4SLinus Torvalds goto done; 17241da177e4SLinus Torvalds } 17251da177e4SLinus Torvalds 1726afe70259SJeff Mahoney /* we've got j_flush_mutex held, nobody is going to delete any 17271da177e4SLinus Torvalds * of these lists out from underneath us 17281da177e4SLinus Torvalds */ 17291da177e4SLinus Torvalds while ((num_trans && transactions_flushed < num_trans) || 17301da177e4SLinus Torvalds (!num_trans && written < num_blocks)) { 17311da177e4SLinus Torvalds 17321da177e4SLinus Torvalds if (jl->j_len == 0 || (jl->j_state & LIST_TOUCHED) || 1733bd4c625cSLinus Torvalds atomic_read(&jl->j_commit_left) 1734bd4c625cSLinus Torvalds || !(jl->j_state & LIST_DIRTY)) { 17351da177e4SLinus Torvalds del_from_work_list(s, jl); 17361da177e4SLinus Torvalds break; 17371da177e4SLinus Torvalds } 17381da177e4SLinus Torvalds ret = write_one_transaction(s, jl, &chunk); 17391da177e4SLinus Torvalds 17401da177e4SLinus Torvalds if (ret < 0) 17411da177e4SLinus Torvalds goto done; 17421da177e4SLinus Torvalds transactions_flushed++; 17431da177e4SLinus Torvalds written += ret; 17441da177e4SLinus Torvalds entry = jl->j_list.next; 17451da177e4SLinus Torvalds 17461da177e4SLinus Torvalds /* did we wrap? */ 17471da177e4SLinus Torvalds if (entry == &journal->j_journal_list) { 17481da177e4SLinus Torvalds break; 17491da177e4SLinus Torvalds } 17501da177e4SLinus Torvalds jl = JOURNAL_LIST_ENTRY(entry); 17511da177e4SLinus Torvalds 17521da177e4SLinus Torvalds /* don't bother with older transactions */ 17531da177e4SLinus Torvalds if (jl->j_trans_id <= orig_trans_id) 17541da177e4SLinus Torvalds break; 17551da177e4SLinus Torvalds } 17561da177e4SLinus Torvalds if (chunk.nr) { 17571da177e4SLinus Torvalds write_chunk(&chunk); 17581da177e4SLinus Torvalds } 17591da177e4SLinus Torvalds 17601da177e4SLinus Torvalds done: 1761afe70259SJeff Mahoney mutex_unlock(&journal->j_flush_mutex); 17621da177e4SLinus Torvalds return ret; 17631da177e4SLinus Torvalds } 17641da177e4SLinus Torvalds 17651da177e4SLinus Torvalds /* for o_sync and fsync heavy applications, they tend to use 17661da177e4SLinus Torvalds ** all the journa list slots with tiny transactions. These 17671da177e4SLinus Torvalds ** trigger lots and lots of calls to update the header block, which 17681da177e4SLinus Torvalds ** adds seeks and slows things down. 17691da177e4SLinus Torvalds ** 17701da177e4SLinus Torvalds ** This function tries to clear out a large chunk of the journal lists 17711da177e4SLinus Torvalds ** at once, which makes everything faster since only the newest journal 17721da177e4SLinus Torvalds ** list updates the header block 17731da177e4SLinus Torvalds */ 17741da177e4SLinus Torvalds static int flush_used_journal_lists(struct super_block *s, 1775bd4c625cSLinus Torvalds struct reiserfs_journal_list *jl) 1776bd4c625cSLinus Torvalds { 17771da177e4SLinus Torvalds unsigned long len = 0; 17781da177e4SLinus Torvalds unsigned long cur_len; 17791da177e4SLinus Torvalds int ret; 17801da177e4SLinus Torvalds int i; 17811da177e4SLinus Torvalds int limit = 256; 17821da177e4SLinus Torvalds struct reiserfs_journal_list *tjl; 17831da177e4SLinus Torvalds struct reiserfs_journal_list *flush_jl; 1784600ed416SJeff Mahoney unsigned int trans_id; 17851da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 17861da177e4SLinus Torvalds 17871da177e4SLinus Torvalds flush_jl = tjl = jl; 17881da177e4SLinus Torvalds 17891da177e4SLinus Torvalds /* in data logging mode, try harder to flush a lot of blocks */ 17901da177e4SLinus Torvalds if (reiserfs_data_log(s)) 17911da177e4SLinus Torvalds limit = 1024; 17921da177e4SLinus Torvalds /* flush for 256 transactions or limit blocks, whichever comes first */ 17931da177e4SLinus Torvalds for (i = 0; i < 256 && len < limit; i++) { 17941da177e4SLinus Torvalds if (atomic_read(&tjl->j_commit_left) || 17951da177e4SLinus Torvalds tjl->j_trans_id < jl->j_trans_id) { 17961da177e4SLinus Torvalds break; 17971da177e4SLinus Torvalds } 17981da177e4SLinus Torvalds cur_len = atomic_read(&tjl->j_nonzerolen); 17991da177e4SLinus Torvalds if (cur_len > 0) { 18001da177e4SLinus Torvalds tjl->j_state &= ~LIST_TOUCHED; 18011da177e4SLinus Torvalds } 18021da177e4SLinus Torvalds len += cur_len; 18031da177e4SLinus Torvalds flush_jl = tjl; 18041da177e4SLinus Torvalds if (tjl->j_list.next == &journal->j_journal_list) 18051da177e4SLinus Torvalds break; 18061da177e4SLinus Torvalds tjl = JOURNAL_LIST_ENTRY(tjl->j_list.next); 18071da177e4SLinus Torvalds } 18081da177e4SLinus Torvalds /* try to find a group of blocks we can flush across all the 18091da177e4SLinus Torvalds ** transactions, but only bother if we've actually spanned 18101da177e4SLinus Torvalds ** across multiple lists 18111da177e4SLinus Torvalds */ 18121da177e4SLinus Torvalds if (flush_jl != jl) { 18131da177e4SLinus Torvalds ret = kupdate_transactions(s, jl, &tjl, &trans_id, len, i); 18141da177e4SLinus Torvalds } 18151da177e4SLinus Torvalds flush_journal_list(s, flush_jl, 1); 18161da177e4SLinus Torvalds return 0; 18171da177e4SLinus Torvalds } 18181da177e4SLinus Torvalds 18191da177e4SLinus Torvalds /* 18201da177e4SLinus Torvalds ** removes any nodes in table with name block and dev as bh. 18211da177e4SLinus Torvalds ** only touchs the hnext and hprev pointers. 18221da177e4SLinus Torvalds */ 18231da177e4SLinus Torvalds void remove_journal_hash(struct super_block *sb, 18241da177e4SLinus Torvalds struct reiserfs_journal_cnode **table, 18251da177e4SLinus Torvalds struct reiserfs_journal_list *jl, 18261da177e4SLinus Torvalds unsigned long block, int remove_freed) 18271da177e4SLinus Torvalds { 18281da177e4SLinus Torvalds struct reiserfs_journal_cnode *cur; 18291da177e4SLinus Torvalds struct reiserfs_journal_cnode **head; 18301da177e4SLinus Torvalds 18311da177e4SLinus Torvalds head = &(journal_hash(table, sb, block)); 18321da177e4SLinus Torvalds if (!head) { 18331da177e4SLinus Torvalds return; 18341da177e4SLinus Torvalds } 18351da177e4SLinus Torvalds cur = *head; 18361da177e4SLinus Torvalds while (cur) { 1837bd4c625cSLinus Torvalds if (cur->blocknr == block && cur->sb == sb 1838bd4c625cSLinus Torvalds && (jl == NULL || jl == cur->jlist) 1839bd4c625cSLinus Torvalds && (!test_bit(BLOCK_FREED, &cur->state) || remove_freed)) { 18401da177e4SLinus Torvalds if (cur->hnext) { 18411da177e4SLinus Torvalds cur->hnext->hprev = cur->hprev; 18421da177e4SLinus Torvalds } 18431da177e4SLinus Torvalds if (cur->hprev) { 18441da177e4SLinus Torvalds cur->hprev->hnext = cur->hnext; 18451da177e4SLinus Torvalds } else { 18461da177e4SLinus Torvalds *head = cur->hnext; 18471da177e4SLinus Torvalds } 18481da177e4SLinus Torvalds cur->blocknr = 0; 18491da177e4SLinus Torvalds cur->sb = NULL; 18501da177e4SLinus Torvalds cur->state = 0; 18511da177e4SLinus Torvalds if (cur->bh && cur->jlist) /* anybody who clears the cur->bh will also dec the nonzerolen */ 18521da177e4SLinus Torvalds atomic_dec(&(cur->jlist->j_nonzerolen)); 18531da177e4SLinus Torvalds cur->bh = NULL; 18541da177e4SLinus Torvalds cur->jlist = NULL; 18551da177e4SLinus Torvalds } 18561da177e4SLinus Torvalds cur = cur->hnext; 18571da177e4SLinus Torvalds } 18581da177e4SLinus Torvalds } 18591da177e4SLinus Torvalds 1860a9dd3643SJeff Mahoney static void free_journal_ram(struct super_block *sb) 1861bd4c625cSLinus Torvalds { 1862a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 1863d739b42bSPekka Enberg kfree(journal->j_current_jl); 18641da177e4SLinus Torvalds journal->j_num_lists--; 18651da177e4SLinus Torvalds 18661da177e4SLinus Torvalds vfree(journal->j_cnode_free_orig); 1867a9dd3643SJeff Mahoney free_list_bitmaps(sb, journal->j_list_bitmap); 1868a9dd3643SJeff Mahoney free_bitmap_nodes(sb); /* must be after free_list_bitmaps */ 18691da177e4SLinus Torvalds if (journal->j_header_bh) { 18701da177e4SLinus Torvalds brelse(journal->j_header_bh); 18711da177e4SLinus Torvalds } 18721da177e4SLinus Torvalds /* j_header_bh is on the journal dev, make sure not to release the journal 18731da177e4SLinus Torvalds * dev until we brelse j_header_bh 18741da177e4SLinus Torvalds */ 1875a9dd3643SJeff Mahoney release_journal_dev(sb, journal); 18761da177e4SLinus Torvalds vfree(journal); 18771da177e4SLinus Torvalds } 18781da177e4SLinus Torvalds 18791da177e4SLinus Torvalds /* 18801da177e4SLinus Torvalds ** call on unmount. Only set error to 1 if you haven't made your way out 18811da177e4SLinus Torvalds ** of read_super() yet. Any other caller must keep error at 0. 18821da177e4SLinus Torvalds */ 1883bd4c625cSLinus Torvalds static int do_journal_release(struct reiserfs_transaction_handle *th, 1884a9dd3643SJeff Mahoney struct super_block *sb, int error) 1885bd4c625cSLinus Torvalds { 18861da177e4SLinus Torvalds struct reiserfs_transaction_handle myth; 18871da177e4SLinus Torvalds int flushed = 0; 1888a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 18891da177e4SLinus Torvalds 18901da177e4SLinus Torvalds /* we only want to flush out transactions if we were called with error == 0 18911da177e4SLinus Torvalds */ 1892a9dd3643SJeff Mahoney if (!error && !(sb->s_flags & MS_RDONLY)) { 18931da177e4SLinus Torvalds /* end the current trans */ 18941da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 1895a9dd3643SJeff Mahoney do_journal_end(th, sb, 10, FLUSH_ALL); 18961da177e4SLinus Torvalds 18971da177e4SLinus Torvalds /* make sure something gets logged to force our way into the flush code */ 1898a9dd3643SJeff Mahoney if (!journal_join(&myth, sb, 1)) { 1899a9dd3643SJeff Mahoney reiserfs_prepare_for_journal(sb, 1900a9dd3643SJeff Mahoney SB_BUFFER_WITH_SB(sb), 1901bd4c625cSLinus Torvalds 1); 1902a9dd3643SJeff Mahoney journal_mark_dirty(&myth, sb, 1903a9dd3643SJeff Mahoney SB_BUFFER_WITH_SB(sb)); 1904a9dd3643SJeff Mahoney do_journal_end(&myth, sb, 1, FLUSH_ALL); 19051da177e4SLinus Torvalds flushed = 1; 19061da177e4SLinus Torvalds } 19071da177e4SLinus Torvalds } 19081da177e4SLinus Torvalds 19091da177e4SLinus Torvalds /* this also catches errors during the do_journal_end above */ 19101da177e4SLinus Torvalds if (!error && reiserfs_is_journal_aborted(journal)) { 19111da177e4SLinus Torvalds memset(&myth, 0, sizeof(myth)); 1912a9dd3643SJeff Mahoney if (!journal_join_abort(&myth, sb, 1)) { 1913a9dd3643SJeff Mahoney reiserfs_prepare_for_journal(sb, 1914a9dd3643SJeff Mahoney SB_BUFFER_WITH_SB(sb), 1915bd4c625cSLinus Torvalds 1); 1916a9dd3643SJeff Mahoney journal_mark_dirty(&myth, sb, 1917a9dd3643SJeff Mahoney SB_BUFFER_WITH_SB(sb)); 1918a9dd3643SJeff Mahoney do_journal_end(&myth, sb, 1, FLUSH_ALL); 19191da177e4SLinus Torvalds } 19201da177e4SLinus Torvalds } 19211da177e4SLinus Torvalds 19221da177e4SLinus Torvalds reiserfs_mounted_fs_count--; 19231da177e4SLinus Torvalds /* wait for all commits to finish */ 1924a9dd3643SJeff Mahoney cancel_delayed_work(&SB_JOURNAL(sb)->j_work); 19258ebc4232SFrederic Weisbecker 19268ebc4232SFrederic Weisbecker /* 19278ebc4232SFrederic Weisbecker * We must release the write lock here because 19288ebc4232SFrederic Weisbecker * the workqueue job (flush_async_commit) needs this lock 19298ebc4232SFrederic Weisbecker */ 19308ebc4232SFrederic Weisbecker reiserfs_write_unlock(sb); 1931033369d1SArtem Bityutskiy 1932033369d1SArtem Bityutskiy cancel_delayed_work_sync(&REISERFS_SB(sb)->old_work); 19331da177e4SLinus Torvalds flush_workqueue(commit_wq); 19348ebc4232SFrederic Weisbecker 19351da177e4SLinus Torvalds if (!reiserfs_mounted_fs_count) { 19361da177e4SLinus Torvalds destroy_workqueue(commit_wq); 19371da177e4SLinus Torvalds commit_wq = NULL; 19381da177e4SLinus Torvalds } 19391da177e4SLinus Torvalds 1940a9dd3643SJeff Mahoney free_journal_ram(sb); 19411da177e4SLinus Torvalds 19420523676dSFrederic Weisbecker reiserfs_write_lock(sb); 19430523676dSFrederic Weisbecker 19441da177e4SLinus Torvalds return 0; 19451da177e4SLinus Torvalds } 19461da177e4SLinus Torvalds 19471da177e4SLinus Torvalds /* 19481da177e4SLinus Torvalds ** call on unmount. flush all journal trans, release all alloc'd ram 19491da177e4SLinus Torvalds */ 1950bd4c625cSLinus Torvalds int journal_release(struct reiserfs_transaction_handle *th, 1951a9dd3643SJeff Mahoney struct super_block *sb) 1952bd4c625cSLinus Torvalds { 1953a9dd3643SJeff Mahoney return do_journal_release(th, sb, 0); 19541da177e4SLinus Torvalds } 1955bd4c625cSLinus Torvalds 19561da177e4SLinus Torvalds /* 19571da177e4SLinus Torvalds ** only call from an error condition inside reiserfs_read_super! 19581da177e4SLinus Torvalds */ 1959bd4c625cSLinus Torvalds int journal_release_error(struct reiserfs_transaction_handle *th, 1960a9dd3643SJeff Mahoney struct super_block *sb) 1961bd4c625cSLinus Torvalds { 1962a9dd3643SJeff Mahoney return do_journal_release(th, sb, 1); 19631da177e4SLinus Torvalds } 19641da177e4SLinus Torvalds 19651da177e4SLinus Torvalds /* compares description block with commit block. returns 1 if they differ, 0 if they are the same */ 1966a9dd3643SJeff Mahoney static int journal_compare_desc_commit(struct super_block *sb, 1967bd4c625cSLinus Torvalds struct reiserfs_journal_desc *desc, 1968bd4c625cSLinus Torvalds struct reiserfs_journal_commit *commit) 1969bd4c625cSLinus Torvalds { 19701da177e4SLinus Torvalds if (get_commit_trans_id(commit) != get_desc_trans_id(desc) || 19711da177e4SLinus Torvalds get_commit_trans_len(commit) != get_desc_trans_len(desc) || 1972a9dd3643SJeff Mahoney get_commit_trans_len(commit) > SB_JOURNAL(sb)->j_trans_max || 1973bd4c625cSLinus Torvalds get_commit_trans_len(commit) <= 0) { 19741da177e4SLinus Torvalds return 1; 19751da177e4SLinus Torvalds } 19761da177e4SLinus Torvalds return 0; 19771da177e4SLinus Torvalds } 1978bd4c625cSLinus Torvalds 19791da177e4SLinus Torvalds /* returns 0 if it did not find a description block 19801da177e4SLinus Torvalds ** returns -1 if it found a corrupt commit block 19811da177e4SLinus Torvalds ** returns 1 if both desc and commit were valid 1982278f6679SJeff Mahoney ** NOTE: only called during fs mount 19831da177e4SLinus Torvalds */ 1984a9dd3643SJeff Mahoney static int journal_transaction_is_valid(struct super_block *sb, 1985bd4c625cSLinus Torvalds struct buffer_head *d_bh, 1986600ed416SJeff Mahoney unsigned int *oldest_invalid_trans_id, 1987bd4c625cSLinus Torvalds unsigned long *newest_mount_id) 1988bd4c625cSLinus Torvalds { 19891da177e4SLinus Torvalds struct reiserfs_journal_desc *desc; 19901da177e4SLinus Torvalds struct reiserfs_journal_commit *commit; 19911da177e4SLinus Torvalds struct buffer_head *c_bh; 19921da177e4SLinus Torvalds unsigned long offset; 19931da177e4SLinus Torvalds 19941da177e4SLinus Torvalds if (!d_bh) 19951da177e4SLinus Torvalds return 0; 19961da177e4SLinus Torvalds 19971da177e4SLinus Torvalds desc = (struct reiserfs_journal_desc *)d_bh->b_data; 1998bd4c625cSLinus Torvalds if (get_desc_trans_len(desc) > 0 1999bd4c625cSLinus Torvalds && !memcmp(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8)) { 2000bd4c625cSLinus Torvalds if (oldest_invalid_trans_id && *oldest_invalid_trans_id 2001bd4c625cSLinus Torvalds && get_desc_trans_id(desc) > *oldest_invalid_trans_id) { 2002a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2003bd4c625cSLinus Torvalds "journal-986: transaction " 20041da177e4SLinus Torvalds "is valid returning because trans_id %d is greater than " 2005bd4c625cSLinus Torvalds "oldest_invalid %lu", 2006bd4c625cSLinus Torvalds get_desc_trans_id(desc), 20071da177e4SLinus Torvalds *oldest_invalid_trans_id); 20081da177e4SLinus Torvalds return 0; 20091da177e4SLinus Torvalds } 2010bd4c625cSLinus Torvalds if (newest_mount_id 2011bd4c625cSLinus Torvalds && *newest_mount_id > get_desc_mount_id(desc)) { 2012a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2013bd4c625cSLinus Torvalds "journal-1087: transaction " 20141da177e4SLinus Torvalds "is valid returning because mount_id %d is less than " 2015bd4c625cSLinus Torvalds "newest_mount_id %lu", 2016bd4c625cSLinus Torvalds get_desc_mount_id(desc), 20171da177e4SLinus Torvalds *newest_mount_id); 20181da177e4SLinus Torvalds return -1; 20191da177e4SLinus Torvalds } 2020a9dd3643SJeff Mahoney if (get_desc_trans_len(desc) > SB_JOURNAL(sb)->j_trans_max) { 2021a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-2018", 202245b03d5eSJeff Mahoney "Bad transaction length %d " 202345b03d5eSJeff Mahoney "encountered, ignoring transaction", 2024bd4c625cSLinus Torvalds get_desc_trans_len(desc)); 20251da177e4SLinus Torvalds return -1; 20261da177e4SLinus Torvalds } 2027a9dd3643SJeff Mahoney offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb); 20281da177e4SLinus Torvalds 20291da177e4SLinus Torvalds /* ok, we have a journal description block, lets see if the transaction was valid */ 2030bd4c625cSLinus Torvalds c_bh = 2031a9dd3643SJeff Mahoney journal_bread(sb, 2032a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2033bd4c625cSLinus Torvalds ((offset + get_desc_trans_len(desc) + 2034a9dd3643SJeff Mahoney 1) % SB_ONDISK_JOURNAL_SIZE(sb))); 20351da177e4SLinus Torvalds if (!c_bh) 20361da177e4SLinus Torvalds return 0; 20371da177e4SLinus Torvalds commit = (struct reiserfs_journal_commit *)c_bh->b_data; 2038a9dd3643SJeff Mahoney if (journal_compare_desc_commit(sb, desc, commit)) { 2039a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 20401da177e4SLinus Torvalds "journal_transaction_is_valid, commit offset %ld had bad " 20411da177e4SLinus Torvalds "time %d or length %d", 2042bd4c625cSLinus Torvalds c_bh->b_blocknr - 2043a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb), 20441da177e4SLinus Torvalds get_commit_trans_id(commit), 20451da177e4SLinus Torvalds get_commit_trans_len(commit)); 20461da177e4SLinus Torvalds brelse(c_bh); 20471da177e4SLinus Torvalds if (oldest_invalid_trans_id) { 2048bd4c625cSLinus Torvalds *oldest_invalid_trans_id = 2049bd4c625cSLinus Torvalds get_desc_trans_id(desc); 2050a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2051bd4c625cSLinus Torvalds "journal-1004: " 20521da177e4SLinus Torvalds "transaction_is_valid setting oldest invalid trans_id " 2053bd4c625cSLinus Torvalds "to %d", 2054bd4c625cSLinus Torvalds get_desc_trans_id(desc)); 20551da177e4SLinus Torvalds } 20561da177e4SLinus Torvalds return -1; 20571da177e4SLinus Torvalds } 20581da177e4SLinus Torvalds brelse(c_bh); 2059a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2060bd4c625cSLinus Torvalds "journal-1006: found valid " 20611da177e4SLinus Torvalds "transaction start offset %llu, len %d id %d", 2062bd4c625cSLinus Torvalds d_bh->b_blocknr - 2063a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb), 2064bd4c625cSLinus Torvalds get_desc_trans_len(desc), 2065bd4c625cSLinus Torvalds get_desc_trans_id(desc)); 20661da177e4SLinus Torvalds return 1; 20671da177e4SLinus Torvalds } else { 20681da177e4SLinus Torvalds return 0; 20691da177e4SLinus Torvalds } 20701da177e4SLinus Torvalds } 20711da177e4SLinus Torvalds 2072bd4c625cSLinus Torvalds static void brelse_array(struct buffer_head **heads, int num) 2073bd4c625cSLinus Torvalds { 20741da177e4SLinus Torvalds int i; 20751da177e4SLinus Torvalds for (i = 0; i < num; i++) { 20761da177e4SLinus Torvalds brelse(heads[i]); 20771da177e4SLinus Torvalds } 20781da177e4SLinus Torvalds } 20791da177e4SLinus Torvalds 20801da177e4SLinus Torvalds /* 20811da177e4SLinus Torvalds ** given the start, and values for the oldest acceptable transactions, 2082278f6679SJeff Mahoney ** this either reads in a replays a transaction, or returns because the 2083278f6679SJeff Mahoney ** transaction is invalid, or too old. 2084278f6679SJeff Mahoney ** NOTE: only called during fs mount 20851da177e4SLinus Torvalds */ 2086a9dd3643SJeff Mahoney static int journal_read_transaction(struct super_block *sb, 2087bd4c625cSLinus Torvalds unsigned long cur_dblock, 2088bd4c625cSLinus Torvalds unsigned long oldest_start, 2089600ed416SJeff Mahoney unsigned int oldest_trans_id, 2090bd4c625cSLinus Torvalds unsigned long newest_mount_id) 2091bd4c625cSLinus Torvalds { 2092a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 20931da177e4SLinus Torvalds struct reiserfs_journal_desc *desc; 20941da177e4SLinus Torvalds struct reiserfs_journal_commit *commit; 2095600ed416SJeff Mahoney unsigned int trans_id = 0; 20961da177e4SLinus Torvalds struct buffer_head *c_bh; 20971da177e4SLinus Torvalds struct buffer_head *d_bh; 20981da177e4SLinus Torvalds struct buffer_head **log_blocks = NULL; 20991da177e4SLinus Torvalds struct buffer_head **real_blocks = NULL; 2100600ed416SJeff Mahoney unsigned int trans_offset; 21011da177e4SLinus Torvalds int i; 21021da177e4SLinus Torvalds int trans_half; 21031da177e4SLinus Torvalds 2104a9dd3643SJeff Mahoney d_bh = journal_bread(sb, cur_dblock); 21051da177e4SLinus Torvalds if (!d_bh) 21061da177e4SLinus Torvalds return 1; 21071da177e4SLinus Torvalds desc = (struct reiserfs_journal_desc *)d_bh->b_data; 2108a9dd3643SJeff Mahoney trans_offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb); 2109a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1037: " 21101da177e4SLinus Torvalds "journal_read_transaction, offset %llu, len %d mount_id %d", 2111a9dd3643SJeff Mahoney d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb), 21121da177e4SLinus Torvalds get_desc_trans_len(desc), get_desc_mount_id(desc)); 21131da177e4SLinus Torvalds if (get_desc_trans_id(desc) < oldest_trans_id) { 2114a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1039: " 21151da177e4SLinus Torvalds "journal_read_trans skipping because %lu is too old", 2116bd4c625cSLinus Torvalds cur_dblock - 2117a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb)); 21181da177e4SLinus Torvalds brelse(d_bh); 21191da177e4SLinus Torvalds return 1; 21201da177e4SLinus Torvalds } 21211da177e4SLinus Torvalds if (get_desc_mount_id(desc) != newest_mount_id) { 2122a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1146: " 21231da177e4SLinus Torvalds "journal_read_trans skipping because %d is != " 21241da177e4SLinus Torvalds "newest_mount_id %lu", get_desc_mount_id(desc), 21251da177e4SLinus Torvalds newest_mount_id); 21261da177e4SLinus Torvalds brelse(d_bh); 21271da177e4SLinus Torvalds return 1; 21281da177e4SLinus Torvalds } 2129a9dd3643SJeff Mahoney c_bh = journal_bread(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 21301da177e4SLinus Torvalds ((trans_offset + get_desc_trans_len(desc) + 1) % 2131a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb))); 21321da177e4SLinus Torvalds if (!c_bh) { 21331da177e4SLinus Torvalds brelse(d_bh); 21341da177e4SLinus Torvalds return 1; 21351da177e4SLinus Torvalds } 21361da177e4SLinus Torvalds commit = (struct reiserfs_journal_commit *)c_bh->b_data; 2137a9dd3643SJeff Mahoney if (journal_compare_desc_commit(sb, desc, commit)) { 2138a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2139bd4c625cSLinus Torvalds "journal_read_transaction, " 21401da177e4SLinus Torvalds "commit offset %llu had bad time %d or length %d", 2141bd4c625cSLinus Torvalds c_bh->b_blocknr - 2142a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb), 2143bd4c625cSLinus Torvalds get_commit_trans_id(commit), 2144bd4c625cSLinus Torvalds get_commit_trans_len(commit)); 21451da177e4SLinus Torvalds brelse(c_bh); 21461da177e4SLinus Torvalds brelse(d_bh); 21471da177e4SLinus Torvalds return 1; 21481da177e4SLinus Torvalds } 21493f8b5ee3SJeff Mahoney 21503f8b5ee3SJeff Mahoney if (bdev_read_only(sb->s_bdev)) { 21513f8b5ee3SJeff Mahoney reiserfs_warning(sb, "clm-2076", 21523f8b5ee3SJeff Mahoney "device is readonly, unable to replay log"); 21533f8b5ee3SJeff Mahoney brelse(c_bh); 21543f8b5ee3SJeff Mahoney brelse(d_bh); 21553f8b5ee3SJeff Mahoney return -EROFS; 21563f8b5ee3SJeff Mahoney } 21573f8b5ee3SJeff Mahoney 21581da177e4SLinus Torvalds trans_id = get_desc_trans_id(desc); 21591da177e4SLinus Torvalds /* now we know we've got a good transaction, and it was inside the valid time ranges */ 2160d739b42bSPekka Enberg log_blocks = kmalloc(get_desc_trans_len(desc) * 2161d739b42bSPekka Enberg sizeof(struct buffer_head *), GFP_NOFS); 2162d739b42bSPekka Enberg real_blocks = kmalloc(get_desc_trans_len(desc) * 2163d739b42bSPekka Enberg sizeof(struct buffer_head *), GFP_NOFS); 21641da177e4SLinus Torvalds if (!log_blocks || !real_blocks) { 21651da177e4SLinus Torvalds brelse(c_bh); 21661da177e4SLinus Torvalds brelse(d_bh); 2167d739b42bSPekka Enberg kfree(log_blocks); 2168d739b42bSPekka Enberg kfree(real_blocks); 2169a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1169", 217045b03d5eSJeff Mahoney "kmalloc failed, unable to mount FS"); 21711da177e4SLinus Torvalds return -1; 21721da177e4SLinus Torvalds } 21731da177e4SLinus Torvalds /* get all the buffer heads */ 2174a9dd3643SJeff Mahoney trans_half = journal_trans_half(sb->s_blocksize); 21751da177e4SLinus Torvalds for (i = 0; i < get_desc_trans_len(desc); i++) { 2176bd4c625cSLinus Torvalds log_blocks[i] = 2177a9dd3643SJeff Mahoney journal_getblk(sb, 2178a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2179bd4c625cSLinus Torvalds (trans_offset + 1 + 2180a9dd3643SJeff Mahoney i) % SB_ONDISK_JOURNAL_SIZE(sb)); 21811da177e4SLinus Torvalds if (i < trans_half) { 2182bd4c625cSLinus Torvalds real_blocks[i] = 2183a9dd3643SJeff Mahoney sb_getblk(sb, 2184bd4c625cSLinus Torvalds le32_to_cpu(desc->j_realblock[i])); 21851da177e4SLinus Torvalds } else { 2186bd4c625cSLinus Torvalds real_blocks[i] = 2187a9dd3643SJeff Mahoney sb_getblk(sb, 2188bd4c625cSLinus Torvalds le32_to_cpu(commit-> 2189bd4c625cSLinus Torvalds j_realblock[i - trans_half])); 21901da177e4SLinus Torvalds } 2191a9dd3643SJeff Mahoney if (real_blocks[i]->b_blocknr > SB_BLOCK_COUNT(sb)) { 2192a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1207", 219345b03d5eSJeff Mahoney "REPLAY FAILURE fsck required! " 219445b03d5eSJeff Mahoney "Block to replay is outside of " 219545b03d5eSJeff Mahoney "filesystem"); 21961da177e4SLinus Torvalds goto abort_replay; 21971da177e4SLinus Torvalds } 21981da177e4SLinus Torvalds /* make sure we don't try to replay onto log or reserved area */ 2199bd4c625cSLinus Torvalds if (is_block_in_log_or_reserved_area 2200a9dd3643SJeff Mahoney (sb, real_blocks[i]->b_blocknr)) { 2201a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1204", 220245b03d5eSJeff Mahoney "REPLAY FAILURE fsck required! " 220345b03d5eSJeff Mahoney "Trying to replay onto a log block"); 22041da177e4SLinus Torvalds abort_replay: 22051da177e4SLinus Torvalds brelse_array(log_blocks, i); 22061da177e4SLinus Torvalds brelse_array(real_blocks, i); 22071da177e4SLinus Torvalds brelse(c_bh); 22081da177e4SLinus Torvalds brelse(d_bh); 2209d739b42bSPekka Enberg kfree(log_blocks); 2210d739b42bSPekka Enberg kfree(real_blocks); 22111da177e4SLinus Torvalds return -1; 22121da177e4SLinus Torvalds } 22131da177e4SLinus Torvalds } 22141da177e4SLinus Torvalds /* read in the log blocks, memcpy to the corresponding real block */ 22151da177e4SLinus Torvalds ll_rw_block(READ, get_desc_trans_len(desc), log_blocks); 22161da177e4SLinus Torvalds for (i = 0; i < get_desc_trans_len(desc); i++) { 22178ebc4232SFrederic Weisbecker 22181da177e4SLinus Torvalds wait_on_buffer(log_blocks[i]); 22191da177e4SLinus Torvalds if (!buffer_uptodate(log_blocks[i])) { 2220a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1212", 222145b03d5eSJeff Mahoney "REPLAY FAILURE fsck required! " 222245b03d5eSJeff Mahoney "buffer write failed"); 2223bd4c625cSLinus Torvalds brelse_array(log_blocks + i, 2224bd4c625cSLinus Torvalds get_desc_trans_len(desc) - i); 22251da177e4SLinus Torvalds brelse_array(real_blocks, get_desc_trans_len(desc)); 22261da177e4SLinus Torvalds brelse(c_bh); 22271da177e4SLinus Torvalds brelse(d_bh); 2228d739b42bSPekka Enberg kfree(log_blocks); 2229d739b42bSPekka Enberg kfree(real_blocks); 22301da177e4SLinus Torvalds return -1; 22311da177e4SLinus Torvalds } 2232bd4c625cSLinus Torvalds memcpy(real_blocks[i]->b_data, log_blocks[i]->b_data, 2233bd4c625cSLinus Torvalds real_blocks[i]->b_size); 22341da177e4SLinus Torvalds set_buffer_uptodate(real_blocks[i]); 22351da177e4SLinus Torvalds brelse(log_blocks[i]); 22361da177e4SLinus Torvalds } 22371da177e4SLinus Torvalds /* flush out the real blocks */ 22381da177e4SLinus Torvalds for (i = 0; i < get_desc_trans_len(desc); i++) { 22391da177e4SLinus Torvalds set_buffer_dirty(real_blocks[i]); 22409cb569d6SChristoph Hellwig write_dirty_buffer(real_blocks[i], WRITE); 22411da177e4SLinus Torvalds } 22421da177e4SLinus Torvalds for (i = 0; i < get_desc_trans_len(desc); i++) { 22431da177e4SLinus Torvalds wait_on_buffer(real_blocks[i]); 22441da177e4SLinus Torvalds if (!buffer_uptodate(real_blocks[i])) { 2245a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1226", 224645b03d5eSJeff Mahoney "REPLAY FAILURE, fsck required! " 224745b03d5eSJeff Mahoney "buffer write failed"); 2248bd4c625cSLinus Torvalds brelse_array(real_blocks + i, 2249bd4c625cSLinus Torvalds get_desc_trans_len(desc) - i); 22501da177e4SLinus Torvalds brelse(c_bh); 22511da177e4SLinus Torvalds brelse(d_bh); 2252d739b42bSPekka Enberg kfree(log_blocks); 2253d739b42bSPekka Enberg kfree(real_blocks); 22541da177e4SLinus Torvalds return -1; 22551da177e4SLinus Torvalds } 22561da177e4SLinus Torvalds brelse(real_blocks[i]); 22571da177e4SLinus Torvalds } 2258bd4c625cSLinus Torvalds cur_dblock = 2259a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2260bd4c625cSLinus Torvalds ((trans_offset + get_desc_trans_len(desc) + 2261a9dd3643SJeff Mahoney 2) % SB_ONDISK_JOURNAL_SIZE(sb)); 2262a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2263bd4c625cSLinus Torvalds "journal-1095: setting journal " "start to offset %ld", 2264a9dd3643SJeff Mahoney cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb)); 22651da177e4SLinus Torvalds 22661da177e4SLinus Torvalds /* init starting values for the first transaction, in case this is the last transaction to be replayed. */ 2267a9dd3643SJeff Mahoney journal->j_start = cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb); 22681da177e4SLinus Torvalds journal->j_last_flush_trans_id = trans_id; 22691da177e4SLinus Torvalds journal->j_trans_id = trans_id + 1; 2270a44c94a7SAlexander Zarochentsev /* check for trans_id overflow */ 2271a44c94a7SAlexander Zarochentsev if (journal->j_trans_id == 0) 2272a44c94a7SAlexander Zarochentsev journal->j_trans_id = 10; 22731da177e4SLinus Torvalds brelse(c_bh); 22741da177e4SLinus Torvalds brelse(d_bh); 2275d739b42bSPekka Enberg kfree(log_blocks); 2276d739b42bSPekka Enberg kfree(real_blocks); 22771da177e4SLinus Torvalds return 0; 22781da177e4SLinus Torvalds } 22791da177e4SLinus Torvalds 22801da177e4SLinus Torvalds /* This function reads blocks starting from block and to max_block of bufsize 22811da177e4SLinus Torvalds size (but no more than BUFNR blocks at a time). This proved to improve 22821da177e4SLinus Torvalds mounting speed on self-rebuilding raid5 arrays at least. 22831da177e4SLinus Torvalds Right now it is only used from journal code. But later we might use it 22841da177e4SLinus Torvalds from other places. 22851da177e4SLinus Torvalds Note: Do not use journal_getblk/sb_getblk functions here! */ 22863ee16670SJeff Mahoney static struct buffer_head *reiserfs_breada(struct block_device *dev, 22873ee16670SJeff Mahoney b_blocknr_t block, int bufsize, 22883ee16670SJeff Mahoney b_blocknr_t max_block) 22891da177e4SLinus Torvalds { 22901da177e4SLinus Torvalds struct buffer_head *bhlist[BUFNR]; 22911da177e4SLinus Torvalds unsigned int blocks = BUFNR; 22921da177e4SLinus Torvalds struct buffer_head *bh; 22931da177e4SLinus Torvalds int i, j; 22941da177e4SLinus Torvalds 22951da177e4SLinus Torvalds bh = __getblk(dev, block, bufsize); 22961da177e4SLinus Torvalds if (buffer_uptodate(bh)) 22971da177e4SLinus Torvalds return (bh); 22981da177e4SLinus Torvalds 22991da177e4SLinus Torvalds if (block + BUFNR > max_block) { 23001da177e4SLinus Torvalds blocks = max_block - block; 23011da177e4SLinus Torvalds } 23021da177e4SLinus Torvalds bhlist[0] = bh; 23031da177e4SLinus Torvalds j = 1; 23041da177e4SLinus Torvalds for (i = 1; i < blocks; i++) { 23051da177e4SLinus Torvalds bh = __getblk(dev, block + i, bufsize); 23061da177e4SLinus Torvalds if (buffer_uptodate(bh)) { 23071da177e4SLinus Torvalds brelse(bh); 23081da177e4SLinus Torvalds break; 2309bd4c625cSLinus Torvalds } else 2310bd4c625cSLinus Torvalds bhlist[j++] = bh; 23111da177e4SLinus Torvalds } 23121da177e4SLinus Torvalds ll_rw_block(READ, j, bhlist); 23131da177e4SLinus Torvalds for (i = 1; i < j; i++) 23141da177e4SLinus Torvalds brelse(bhlist[i]); 23151da177e4SLinus Torvalds bh = bhlist[0]; 23161da177e4SLinus Torvalds wait_on_buffer(bh); 23171da177e4SLinus Torvalds if (buffer_uptodate(bh)) 23181da177e4SLinus Torvalds return bh; 23191da177e4SLinus Torvalds brelse(bh); 23201da177e4SLinus Torvalds return NULL; 23211da177e4SLinus Torvalds } 23221da177e4SLinus Torvalds 23231da177e4SLinus Torvalds /* 23241da177e4SLinus Torvalds ** read and replay the log 2325278f6679SJeff Mahoney ** on a clean unmount, the journal header's next unflushed pointer will 2326278f6679SJeff Mahoney ** be to an invalid transaction. This tests that before finding all the 2327278f6679SJeff Mahoney ** transactions in the log, which makes normal mount times fast. 2328278f6679SJeff Mahoney ** After a crash, this starts with the next unflushed transaction, and 2329278f6679SJeff Mahoney ** replays until it finds one too old, or invalid. 23301da177e4SLinus Torvalds ** On exit, it sets things up so the first transaction will work correctly. 2331278f6679SJeff Mahoney ** NOTE: only called during fs mount 23321da177e4SLinus Torvalds */ 2333a9dd3643SJeff Mahoney static int journal_read(struct super_block *sb) 2334bd4c625cSLinus Torvalds { 2335a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 23361da177e4SLinus Torvalds struct reiserfs_journal_desc *desc; 2337600ed416SJeff Mahoney unsigned int oldest_trans_id = 0; 2338600ed416SJeff Mahoney unsigned int oldest_invalid_trans_id = 0; 23391da177e4SLinus Torvalds time_t start; 23401da177e4SLinus Torvalds unsigned long oldest_start = 0; 23411da177e4SLinus Torvalds unsigned long cur_dblock = 0; 23421da177e4SLinus Torvalds unsigned long newest_mount_id = 9; 23431da177e4SLinus Torvalds struct buffer_head *d_bh; 23441da177e4SLinus Torvalds struct reiserfs_journal_header *jh; 23451da177e4SLinus Torvalds int valid_journal_header = 0; 23461da177e4SLinus Torvalds int replay_count = 0; 23471da177e4SLinus Torvalds int continue_replay = 1; 23481da177e4SLinus Torvalds int ret; 23491da177e4SLinus Torvalds char b[BDEVNAME_SIZE]; 23501da177e4SLinus Torvalds 2351a9dd3643SJeff Mahoney cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(sb); 2352a9dd3643SJeff Mahoney reiserfs_info(sb, "checking transaction log (%s)\n", 23531da177e4SLinus Torvalds bdevname(journal->j_dev_bd, b)); 23541da177e4SLinus Torvalds start = get_seconds(); 23551da177e4SLinus Torvalds 23561da177e4SLinus Torvalds /* step 1, read in the journal header block. Check the transaction it says 23571da177e4SLinus Torvalds ** is the first unflushed, and if that transaction is not valid, 23581da177e4SLinus Torvalds ** replay is done 23591da177e4SLinus Torvalds */ 2360a9dd3643SJeff Mahoney journal->j_header_bh = journal_bread(sb, 2361a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) 2362a9dd3643SJeff Mahoney + SB_ONDISK_JOURNAL_SIZE(sb)); 23631da177e4SLinus Torvalds if (!journal->j_header_bh) { 23641da177e4SLinus Torvalds return 1; 23651da177e4SLinus Torvalds } 23661da177e4SLinus Torvalds jh = (struct reiserfs_journal_header *)(journal->j_header_bh->b_data); 2367c499ec24SVladimir V. Saveliev if (le32_to_cpu(jh->j_first_unflushed_offset) < 2368a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb) 2369bd4c625cSLinus Torvalds && le32_to_cpu(jh->j_last_flush_trans_id) > 0) { 2370bd4c625cSLinus Torvalds oldest_start = 2371a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 23721da177e4SLinus Torvalds le32_to_cpu(jh->j_first_unflushed_offset); 23731da177e4SLinus Torvalds oldest_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) + 1; 23741da177e4SLinus Torvalds newest_mount_id = le32_to_cpu(jh->j_mount_id); 2375a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2376bd4c625cSLinus Torvalds "journal-1153: found in " 23771da177e4SLinus Torvalds "header: first_unflushed_offset %d, last_flushed_trans_id " 23781da177e4SLinus Torvalds "%lu", le32_to_cpu(jh->j_first_unflushed_offset), 23791da177e4SLinus Torvalds le32_to_cpu(jh->j_last_flush_trans_id)); 23801da177e4SLinus Torvalds valid_journal_header = 1; 23811da177e4SLinus Torvalds 23821da177e4SLinus Torvalds /* now, we try to read the first unflushed offset. If it is not valid, 23831da177e4SLinus Torvalds ** there is nothing more we can do, and it makes no sense to read 23841da177e4SLinus Torvalds ** through the whole log. 23851da177e4SLinus Torvalds */ 2386bd4c625cSLinus Torvalds d_bh = 2387a9dd3643SJeff Mahoney journal_bread(sb, 2388a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2389bd4c625cSLinus Torvalds le32_to_cpu(jh->j_first_unflushed_offset)); 2390a9dd3643SJeff Mahoney ret = journal_transaction_is_valid(sb, d_bh, NULL, NULL); 23911da177e4SLinus Torvalds if (!ret) { 23921da177e4SLinus Torvalds continue_replay = 0; 23931da177e4SLinus Torvalds } 23941da177e4SLinus Torvalds brelse(d_bh); 23951da177e4SLinus Torvalds goto start_log_replay; 23961da177e4SLinus Torvalds } 23971da177e4SLinus Torvalds 23981da177e4SLinus Torvalds /* ok, there are transactions that need to be replayed. start with the first log block, find 23991da177e4SLinus Torvalds ** all the valid transactions, and pick out the oldest. 24001da177e4SLinus Torvalds */ 2401bd4c625cSLinus Torvalds while (continue_replay 2402bd4c625cSLinus Torvalds && cur_dblock < 2403a9dd3643SJeff Mahoney (SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2404a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb))) { 24051da177e4SLinus Torvalds /* Note that it is required for blocksize of primary fs device and journal 24061da177e4SLinus Torvalds device to be the same */ 2407bd4c625cSLinus Torvalds d_bh = 2408bd4c625cSLinus Torvalds reiserfs_breada(journal->j_dev_bd, cur_dblock, 2409a9dd3643SJeff Mahoney sb->s_blocksize, 2410a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2411a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb)); 2412bd4c625cSLinus Torvalds ret = 2413a9dd3643SJeff Mahoney journal_transaction_is_valid(sb, d_bh, 2414bd4c625cSLinus Torvalds &oldest_invalid_trans_id, 2415bd4c625cSLinus Torvalds &newest_mount_id); 24161da177e4SLinus Torvalds if (ret == 1) { 24171da177e4SLinus Torvalds desc = (struct reiserfs_journal_desc *)d_bh->b_data; 24181da177e4SLinus Torvalds if (oldest_start == 0) { /* init all oldest_ values */ 24191da177e4SLinus Torvalds oldest_trans_id = get_desc_trans_id(desc); 24201da177e4SLinus Torvalds oldest_start = d_bh->b_blocknr; 24211da177e4SLinus Torvalds newest_mount_id = get_desc_mount_id(desc); 2422a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2423bd4c625cSLinus Torvalds "journal-1179: Setting " 24241da177e4SLinus Torvalds "oldest_start to offset %llu, trans_id %lu", 2425bd4c625cSLinus Torvalds oldest_start - 2426bd4c625cSLinus Torvalds SB_ONDISK_JOURNAL_1st_BLOCK 2427a9dd3643SJeff Mahoney (sb), oldest_trans_id); 24281da177e4SLinus Torvalds } else if (oldest_trans_id > get_desc_trans_id(desc)) { 24291da177e4SLinus Torvalds /* one we just read was older */ 24301da177e4SLinus Torvalds oldest_trans_id = get_desc_trans_id(desc); 24311da177e4SLinus Torvalds oldest_start = d_bh->b_blocknr; 2432a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2433bd4c625cSLinus Torvalds "journal-1180: Resetting " 24341da177e4SLinus Torvalds "oldest_start to offset %lu, trans_id %lu", 2435bd4c625cSLinus Torvalds oldest_start - 2436bd4c625cSLinus Torvalds SB_ONDISK_JOURNAL_1st_BLOCK 2437a9dd3643SJeff Mahoney (sb), oldest_trans_id); 24381da177e4SLinus Torvalds } 24391da177e4SLinus Torvalds if (newest_mount_id < get_desc_mount_id(desc)) { 24401da177e4SLinus Torvalds newest_mount_id = get_desc_mount_id(desc); 2441a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2442bd4c625cSLinus Torvalds "journal-1299: Setting " 2443bd4c625cSLinus Torvalds "newest_mount_id to %d", 2444bd4c625cSLinus Torvalds get_desc_mount_id(desc)); 24451da177e4SLinus Torvalds } 24461da177e4SLinus Torvalds cur_dblock += get_desc_trans_len(desc) + 2; 24471da177e4SLinus Torvalds } else { 24481da177e4SLinus Torvalds cur_dblock++; 24491da177e4SLinus Torvalds } 24501da177e4SLinus Torvalds brelse(d_bh); 24511da177e4SLinus Torvalds } 24521da177e4SLinus Torvalds 24531da177e4SLinus Torvalds start_log_replay: 24541da177e4SLinus Torvalds cur_dblock = oldest_start; 24551da177e4SLinus Torvalds if (oldest_trans_id) { 2456a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2457bd4c625cSLinus Torvalds "journal-1206: Starting replay " 24581da177e4SLinus Torvalds "from offset %llu, trans_id %lu", 2459a9dd3643SJeff Mahoney cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb), 24601da177e4SLinus Torvalds oldest_trans_id); 24611da177e4SLinus Torvalds 24621da177e4SLinus Torvalds } 24631da177e4SLinus Torvalds replay_count = 0; 24641da177e4SLinus Torvalds while (continue_replay && oldest_trans_id > 0) { 2465bd4c625cSLinus Torvalds ret = 2466a9dd3643SJeff Mahoney journal_read_transaction(sb, cur_dblock, oldest_start, 2467bd4c625cSLinus Torvalds oldest_trans_id, newest_mount_id); 24681da177e4SLinus Torvalds if (ret < 0) { 24691da177e4SLinus Torvalds return ret; 24701da177e4SLinus Torvalds } else if (ret != 0) { 24711da177e4SLinus Torvalds break; 24721da177e4SLinus Torvalds } 2473bd4c625cSLinus Torvalds cur_dblock = 2474a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + journal->j_start; 24751da177e4SLinus Torvalds replay_count++; 24761da177e4SLinus Torvalds if (cur_dblock == oldest_start) 24771da177e4SLinus Torvalds break; 24781da177e4SLinus Torvalds } 24791da177e4SLinus Torvalds 24801da177e4SLinus Torvalds if (oldest_trans_id == 0) { 2481a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, 2482bd4c625cSLinus Torvalds "journal-1225: No valid " "transactions found"); 24831da177e4SLinus Torvalds } 24841da177e4SLinus Torvalds /* j_start does not get set correctly if we don't replay any transactions. 24851da177e4SLinus Torvalds ** if we had a valid journal_header, set j_start to the first unflushed transaction value, 24861da177e4SLinus Torvalds ** copy the trans_id from the header 24871da177e4SLinus Torvalds */ 24881da177e4SLinus Torvalds if (valid_journal_header && replay_count == 0) { 24891da177e4SLinus Torvalds journal->j_start = le32_to_cpu(jh->j_first_unflushed_offset); 2490bd4c625cSLinus Torvalds journal->j_trans_id = 2491bd4c625cSLinus Torvalds le32_to_cpu(jh->j_last_flush_trans_id) + 1; 2492a44c94a7SAlexander Zarochentsev /* check for trans_id overflow */ 2493a44c94a7SAlexander Zarochentsev if (journal->j_trans_id == 0) 2494a44c94a7SAlexander Zarochentsev journal->j_trans_id = 10; 2495bd4c625cSLinus Torvalds journal->j_last_flush_trans_id = 2496bd4c625cSLinus Torvalds le32_to_cpu(jh->j_last_flush_trans_id); 24971da177e4SLinus Torvalds journal->j_mount_id = le32_to_cpu(jh->j_mount_id) + 1; 24981da177e4SLinus Torvalds } else { 24991da177e4SLinus Torvalds journal->j_mount_id = newest_mount_id + 1; 25001da177e4SLinus Torvalds } 2501a9dd3643SJeff Mahoney reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1299: Setting " 25021da177e4SLinus Torvalds "newest_mount_id to %lu", journal->j_mount_id); 25031da177e4SLinus Torvalds journal->j_first_unflushed_offset = journal->j_start; 25041da177e4SLinus Torvalds if (replay_count > 0) { 2505a9dd3643SJeff Mahoney reiserfs_info(sb, 2506bd4c625cSLinus Torvalds "replayed %d transactions in %lu seconds\n", 25071da177e4SLinus Torvalds replay_count, get_seconds() - start); 25081da177e4SLinus Torvalds } 2509278f6679SJeff Mahoney /* needed to satisfy the locking in _update_journal_header_block */ 2510278f6679SJeff Mahoney reiserfs_write_lock(sb); 2511a9dd3643SJeff Mahoney if (!bdev_read_only(sb->s_bdev) && 2512a9dd3643SJeff Mahoney _update_journal_header_block(sb, journal->j_start, 2513bd4c625cSLinus Torvalds journal->j_last_flush_trans_id)) { 2514278f6679SJeff Mahoney reiserfs_write_unlock(sb); 25151da177e4SLinus Torvalds /* replay failed, caller must call free_journal_ram and abort 25161da177e4SLinus Torvalds ** the mount 25171da177e4SLinus Torvalds */ 25181da177e4SLinus Torvalds return -1; 25191da177e4SLinus Torvalds } 2520278f6679SJeff Mahoney reiserfs_write_unlock(sb); 25211da177e4SLinus Torvalds return 0; 25221da177e4SLinus Torvalds } 25231da177e4SLinus Torvalds 25241da177e4SLinus Torvalds static struct reiserfs_journal_list *alloc_journal_list(struct super_block *s) 25251da177e4SLinus Torvalds { 25261da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 25278c777cc4SPekka Enberg jl = kzalloc(sizeof(struct reiserfs_journal_list), 25288c777cc4SPekka Enberg GFP_NOFS | __GFP_NOFAIL); 25291da177e4SLinus Torvalds INIT_LIST_HEAD(&jl->j_list); 25301da177e4SLinus Torvalds INIT_LIST_HEAD(&jl->j_working_list); 25311da177e4SLinus Torvalds INIT_LIST_HEAD(&jl->j_tail_bh_list); 25321da177e4SLinus Torvalds INIT_LIST_HEAD(&jl->j_bh_list); 253390415deaSJeff Mahoney mutex_init(&jl->j_commit_mutex); 25341da177e4SLinus Torvalds SB_JOURNAL(s)->j_num_lists++; 25351da177e4SLinus Torvalds get_journal_list(jl); 25361da177e4SLinus Torvalds return jl; 25371da177e4SLinus Torvalds } 25381da177e4SLinus Torvalds 2539a9dd3643SJeff Mahoney static void journal_list_init(struct super_block *sb) 2540bd4c625cSLinus Torvalds { 2541a9dd3643SJeff Mahoney SB_JOURNAL(sb)->j_current_jl = alloc_journal_list(sb); 25421da177e4SLinus Torvalds } 25431da177e4SLinus Torvalds 25444385bab1SAl Viro static void release_journal_dev(struct super_block *super, 25451da177e4SLinus Torvalds struct reiserfs_journal *journal) 25461da177e4SLinus Torvalds { 254786098fa0SChristoph Hellwig if (journal->j_dev_bd != NULL) { 25484385bab1SAl Viro blkdev_put(journal->j_dev_bd, journal->j_dev_mode); 25491da177e4SLinus Torvalds journal->j_dev_bd = NULL; 25501da177e4SLinus Torvalds } 25511da177e4SLinus Torvalds } 25521da177e4SLinus Torvalds 25531da177e4SLinus Torvalds static int journal_init_dev(struct super_block *super, 25541da177e4SLinus Torvalds struct reiserfs_journal *journal, 25551da177e4SLinus Torvalds const char *jdev_name) 25561da177e4SLinus Torvalds { 25571da177e4SLinus Torvalds int result; 25581da177e4SLinus Torvalds dev_t jdev; 2559e525fd89STejun Heo fmode_t blkdev_mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL; 25601da177e4SLinus Torvalds char b[BDEVNAME_SIZE]; 25611da177e4SLinus Torvalds 25621da177e4SLinus Torvalds result = 0; 25631da177e4SLinus Torvalds 25641da177e4SLinus Torvalds journal->j_dev_bd = NULL; 25651da177e4SLinus Torvalds jdev = SB_ONDISK_JOURNAL_DEVICE(super) ? 25661da177e4SLinus Torvalds new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super)) : super->s_dev; 25671da177e4SLinus Torvalds 25681da177e4SLinus Torvalds if (bdev_read_only(super->s_bdev)) 25691da177e4SLinus Torvalds blkdev_mode = FMODE_READ; 25701da177e4SLinus Torvalds 25711da177e4SLinus Torvalds /* there is no "jdev" option and journal is on separate device */ 25721da177e4SLinus Torvalds if ((!jdev_name || !jdev_name[0])) { 2573e525fd89STejun Heo if (jdev == super->s_dev) 2574e525fd89STejun Heo blkdev_mode &= ~FMODE_EXCL; 2575d4d77629STejun Heo journal->j_dev_bd = blkdev_get_by_dev(jdev, blkdev_mode, 2576d4d77629STejun Heo journal); 2577e5eb8caaSAl Viro journal->j_dev_mode = blkdev_mode; 25781da177e4SLinus Torvalds if (IS_ERR(journal->j_dev_bd)) { 25791da177e4SLinus Torvalds result = PTR_ERR(journal->j_dev_bd); 25801da177e4SLinus Torvalds journal->j_dev_bd = NULL; 258145b03d5eSJeff Mahoney reiserfs_warning(super, "sh-458", 25821da177e4SLinus Torvalds "cannot init journal device '%s': %i", 25831da177e4SLinus Torvalds __bdevname(jdev, b), result); 25841da177e4SLinus Torvalds return result; 2585e525fd89STejun Heo } else if (jdev != super->s_dev) 25861da177e4SLinus Torvalds set_blocksize(journal->j_dev_bd, super->s_blocksize); 258786098fa0SChristoph Hellwig 25881da177e4SLinus Torvalds return 0; 25891da177e4SLinus Torvalds } 25901da177e4SLinus Torvalds 2591e5eb8caaSAl Viro journal->j_dev_mode = blkdev_mode; 2592d4d77629STejun Heo journal->j_dev_bd = blkdev_get_by_path(jdev_name, blkdev_mode, journal); 259386098fa0SChristoph Hellwig if (IS_ERR(journal->j_dev_bd)) { 259486098fa0SChristoph Hellwig result = PTR_ERR(journal->j_dev_bd); 259586098fa0SChristoph Hellwig journal->j_dev_bd = NULL; 259686098fa0SChristoph Hellwig reiserfs_warning(super, 259786098fa0SChristoph Hellwig "journal_init_dev: Cannot open '%s': %i", 259886098fa0SChristoph Hellwig jdev_name, result); 259986098fa0SChristoph Hellwig return result; 260086098fa0SChristoph Hellwig } 260186098fa0SChristoph Hellwig 26021da177e4SLinus Torvalds set_blocksize(journal->j_dev_bd, super->s_blocksize); 2603bd4c625cSLinus Torvalds reiserfs_info(super, 2604bd4c625cSLinus Torvalds "journal_init_dev: journal device: %s\n", 260574f9f974SEdward Shishkin bdevname(journal->j_dev_bd, b)); 260686098fa0SChristoph Hellwig return 0; 26071da177e4SLinus Torvalds } 26081da177e4SLinus Torvalds 2609cf3d0b81SEdward Shishkin /** 2610cf3d0b81SEdward Shishkin * When creating/tuning a file system user can assign some 2611cf3d0b81SEdward Shishkin * journal params within boundaries which depend on the ratio 2612cf3d0b81SEdward Shishkin * blocksize/standard_blocksize. 2613cf3d0b81SEdward Shishkin * 2614cf3d0b81SEdward Shishkin * For blocks >= standard_blocksize transaction size should 2615cf3d0b81SEdward Shishkin * be not less then JOURNAL_TRANS_MIN_DEFAULT, and not more 2616cf3d0b81SEdward Shishkin * then JOURNAL_TRANS_MAX_DEFAULT. 2617cf3d0b81SEdward Shishkin * 2618cf3d0b81SEdward Shishkin * For blocks < standard_blocksize these boundaries should be 2619cf3d0b81SEdward Shishkin * decreased proportionally. 2620cf3d0b81SEdward Shishkin */ 2621cf3d0b81SEdward Shishkin #define REISERFS_STANDARD_BLKSIZE (4096) 2622cf3d0b81SEdward Shishkin 2623a9dd3643SJeff Mahoney static int check_advise_trans_params(struct super_block *sb, 2624cf3d0b81SEdward Shishkin struct reiserfs_journal *journal) 2625cf3d0b81SEdward Shishkin { 2626cf3d0b81SEdward Shishkin if (journal->j_trans_max) { 2627cf3d0b81SEdward Shishkin /* Non-default journal params. 2628cf3d0b81SEdward Shishkin Do sanity check for them. */ 2629cf3d0b81SEdward Shishkin int ratio = 1; 2630a9dd3643SJeff Mahoney if (sb->s_blocksize < REISERFS_STANDARD_BLKSIZE) 2631a9dd3643SJeff Mahoney ratio = REISERFS_STANDARD_BLKSIZE / sb->s_blocksize; 2632cf3d0b81SEdward Shishkin 2633cf3d0b81SEdward Shishkin if (journal->j_trans_max > JOURNAL_TRANS_MAX_DEFAULT / ratio || 2634cf3d0b81SEdward Shishkin journal->j_trans_max < JOURNAL_TRANS_MIN_DEFAULT / ratio || 2635a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb) / journal->j_trans_max < 2636cf3d0b81SEdward Shishkin JOURNAL_MIN_RATIO) { 2637a9dd3643SJeff Mahoney reiserfs_warning(sb, "sh-462", 263845b03d5eSJeff Mahoney "bad transaction max size (%u). " 263945b03d5eSJeff Mahoney "FSCK?", journal->j_trans_max); 2640cf3d0b81SEdward Shishkin return 1; 2641cf3d0b81SEdward Shishkin } 2642cf3d0b81SEdward Shishkin if (journal->j_max_batch != (journal->j_trans_max) * 2643cf3d0b81SEdward Shishkin JOURNAL_MAX_BATCH_DEFAULT/JOURNAL_TRANS_MAX_DEFAULT) { 2644a9dd3643SJeff Mahoney reiserfs_warning(sb, "sh-463", 264545b03d5eSJeff Mahoney "bad transaction max batch (%u). " 264645b03d5eSJeff Mahoney "FSCK?", journal->j_max_batch); 2647cf3d0b81SEdward Shishkin return 1; 2648cf3d0b81SEdward Shishkin } 2649cf3d0b81SEdward Shishkin } else { 2650cf3d0b81SEdward Shishkin /* Default journal params. 2651cf3d0b81SEdward Shishkin The file system was created by old version 2652cf3d0b81SEdward Shishkin of mkreiserfs, so some fields contain zeros, 2653cf3d0b81SEdward Shishkin and we need to advise proper values for them */ 2654a9dd3643SJeff Mahoney if (sb->s_blocksize != REISERFS_STANDARD_BLKSIZE) { 2655a9dd3643SJeff Mahoney reiserfs_warning(sb, "sh-464", "bad blocksize (%u)", 2656a9dd3643SJeff Mahoney sb->s_blocksize); 265745b03d5eSJeff Mahoney return 1; 265845b03d5eSJeff Mahoney } 2659cf3d0b81SEdward Shishkin journal->j_trans_max = JOURNAL_TRANS_MAX_DEFAULT; 2660cf3d0b81SEdward Shishkin journal->j_max_batch = JOURNAL_MAX_BATCH_DEFAULT; 2661cf3d0b81SEdward Shishkin journal->j_max_commit_age = JOURNAL_MAX_COMMIT_AGE; 2662cf3d0b81SEdward Shishkin } 2663cf3d0b81SEdward Shishkin return 0; 2664cf3d0b81SEdward Shishkin } 2665cf3d0b81SEdward Shishkin 26661da177e4SLinus Torvalds /* 26671da177e4SLinus Torvalds ** must be called once on fs mount. calls journal_read for you 26681da177e4SLinus Torvalds */ 2669a9dd3643SJeff Mahoney int journal_init(struct super_block *sb, const char *j_dev_name, 2670bd4c625cSLinus Torvalds int old_format, unsigned int commit_max_age) 2671bd4c625cSLinus Torvalds { 2672a9dd3643SJeff Mahoney int num_cnodes = SB_ONDISK_JOURNAL_SIZE(sb) * 2; 26731da177e4SLinus Torvalds struct buffer_head *bhjh; 26741da177e4SLinus Torvalds struct reiserfs_super_block *rs; 26751da177e4SLinus Torvalds struct reiserfs_journal_header *jh; 26761da177e4SLinus Torvalds struct reiserfs_journal *journal; 26771da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 26781da177e4SLinus Torvalds char b[BDEVNAME_SIZE]; 267998ea3f50SFrederic Weisbecker int ret; 26801da177e4SLinus Torvalds 2681558feb08SJoe Perches journal = SB_JOURNAL(sb) = vzalloc(sizeof(struct reiserfs_journal)); 26821da177e4SLinus Torvalds if (!journal) { 2683a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1256", 268445b03d5eSJeff Mahoney "unable to get memory for journal structure"); 26851da177e4SLinus Torvalds return 1; 26861da177e4SLinus Torvalds } 26871da177e4SLinus Torvalds INIT_LIST_HEAD(&journal->j_bitmap_nodes); 26881da177e4SLinus Torvalds INIT_LIST_HEAD(&journal->j_prealloc_list); 26891da177e4SLinus Torvalds INIT_LIST_HEAD(&journal->j_working_list); 26901da177e4SLinus Torvalds INIT_LIST_HEAD(&journal->j_journal_list); 26911da177e4SLinus Torvalds journal->j_persistent_trans = 0; 269237c69b98SFrederic Weisbecker if (reiserfs_allocate_list_bitmaps(sb, journal->j_list_bitmap, 269337c69b98SFrederic Weisbecker reiserfs_bmap_count(sb))) 26941da177e4SLinus Torvalds goto free_and_return; 269598ea3f50SFrederic Weisbecker 2696a9dd3643SJeff Mahoney allocate_bitmap_nodes(sb); 26971da177e4SLinus Torvalds 26981da177e4SLinus Torvalds /* reserved for journal area support */ 2699a9dd3643SJeff Mahoney SB_JOURNAL_1st_RESERVED_BLOCK(sb) = (old_format ? 2700bd4c625cSLinus Torvalds REISERFS_OLD_DISK_OFFSET_IN_BYTES 2701a9dd3643SJeff Mahoney / sb->s_blocksize + 2702a9dd3643SJeff Mahoney reiserfs_bmap_count(sb) + 2703bd4c625cSLinus Torvalds 1 : 2704bd4c625cSLinus Torvalds REISERFS_DISK_OFFSET_IN_BYTES / 2705a9dd3643SJeff Mahoney sb->s_blocksize + 2); 27061da177e4SLinus Torvalds 270725985edcSLucas De Marchi /* Sanity check to see is the standard journal fitting within first bitmap 27081da177e4SLinus Torvalds (actual for small blocksizes) */ 2709a9dd3643SJeff Mahoney if (!SB_ONDISK_JOURNAL_DEVICE(sb) && 2710a9dd3643SJeff Mahoney (SB_JOURNAL_1st_RESERVED_BLOCK(sb) + 2711a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb) > sb->s_blocksize * 8)) { 2712a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1393", 271345b03d5eSJeff Mahoney "journal does not fit for area addressed " 271445b03d5eSJeff Mahoney "by first of bitmap blocks. It starts at " 27151da177e4SLinus Torvalds "%u and its size is %u. Block size %ld", 2716a9dd3643SJeff Mahoney SB_JOURNAL_1st_RESERVED_BLOCK(sb), 2717a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb), 2718a9dd3643SJeff Mahoney sb->s_blocksize); 27191da177e4SLinus Torvalds goto free_and_return; 27201da177e4SLinus Torvalds } 27211da177e4SLinus Torvalds 2722a9dd3643SJeff Mahoney if (journal_init_dev(sb, journal, j_dev_name) != 0) { 2723a9dd3643SJeff Mahoney reiserfs_warning(sb, "sh-462", 272445b03d5eSJeff Mahoney "unable to initialize jornal device"); 27251da177e4SLinus Torvalds goto free_and_return; 27261da177e4SLinus Torvalds } 27271da177e4SLinus Torvalds 2728a9dd3643SJeff Mahoney rs = SB_DISK_SUPER_BLOCK(sb); 27291da177e4SLinus Torvalds 27301da177e4SLinus Torvalds /* read journal header */ 2731a9dd3643SJeff Mahoney bhjh = journal_bread(sb, 2732a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 2733a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb)); 27341da177e4SLinus Torvalds if (!bhjh) { 2735a9dd3643SJeff Mahoney reiserfs_warning(sb, "sh-459", 273645b03d5eSJeff Mahoney "unable to read journal header"); 27371da177e4SLinus Torvalds goto free_and_return; 27381da177e4SLinus Torvalds } 27391da177e4SLinus Torvalds jh = (struct reiserfs_journal_header *)(bhjh->b_data); 27401da177e4SLinus Torvalds 27411da177e4SLinus Torvalds /* make sure that journal matches to the super block */ 2742bd4c625cSLinus Torvalds if (is_reiserfs_jr(rs) 2743bd4c625cSLinus Torvalds && (le32_to_cpu(jh->jh_journal.jp_journal_magic) != 2744bd4c625cSLinus Torvalds sb_jp_journal_magic(rs))) { 2745a9dd3643SJeff Mahoney reiserfs_warning(sb, "sh-460", 274645b03d5eSJeff Mahoney "journal header magic %x (device %s) does " 274745b03d5eSJeff Mahoney "not match to magic found in super block %x", 274845b03d5eSJeff Mahoney jh->jh_journal.jp_journal_magic, 27491da177e4SLinus Torvalds bdevname(journal->j_dev_bd, b), 27501da177e4SLinus Torvalds sb_jp_journal_magic(rs)); 27511da177e4SLinus Torvalds brelse(bhjh); 27521da177e4SLinus Torvalds goto free_and_return; 27531da177e4SLinus Torvalds } 27541da177e4SLinus Torvalds 27551da177e4SLinus Torvalds journal->j_trans_max = le32_to_cpu(jh->jh_journal.jp_journal_trans_max); 27561da177e4SLinus Torvalds journal->j_max_batch = le32_to_cpu(jh->jh_journal.jp_journal_max_batch); 2757bd4c625cSLinus Torvalds journal->j_max_commit_age = 2758bd4c625cSLinus Torvalds le32_to_cpu(jh->jh_journal.jp_journal_max_commit_age); 27591da177e4SLinus Torvalds journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; 27601da177e4SLinus Torvalds 2761a9dd3643SJeff Mahoney if (check_advise_trans_params(sb, journal) != 0) 2762cf3d0b81SEdward Shishkin goto free_and_return; 27631da177e4SLinus Torvalds journal->j_default_max_commit_age = journal->j_max_commit_age; 27641da177e4SLinus Torvalds 27651da177e4SLinus Torvalds if (commit_max_age != 0) { 27661da177e4SLinus Torvalds journal->j_max_commit_age = commit_max_age; 27671da177e4SLinus Torvalds journal->j_max_trans_age = commit_max_age; 27681da177e4SLinus Torvalds } 27691da177e4SLinus Torvalds 2770a9dd3643SJeff Mahoney reiserfs_info(sb, "journal params: device %s, size %u, " 27711da177e4SLinus Torvalds "journal first block %u, max trans len %u, max batch %u, " 27721da177e4SLinus Torvalds "max commit age %u, max trans age %u\n", 27731da177e4SLinus Torvalds bdevname(journal->j_dev_bd, b), 2774a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb), 2775a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb), 27761da177e4SLinus Torvalds journal->j_trans_max, 27771da177e4SLinus Torvalds journal->j_max_batch, 2778bd4c625cSLinus Torvalds journal->j_max_commit_age, journal->j_max_trans_age); 27791da177e4SLinus Torvalds 27801da177e4SLinus Torvalds brelse(bhjh); 27811da177e4SLinus Torvalds 27821da177e4SLinus Torvalds journal->j_list_bitmap_index = 0; 2783a9dd3643SJeff Mahoney journal_list_init(sb); 27841da177e4SLinus Torvalds 2785bd4c625cSLinus Torvalds memset(journal->j_list_hash_table, 0, 2786bd4c625cSLinus Torvalds JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)); 27871da177e4SLinus Torvalds 27881da177e4SLinus Torvalds INIT_LIST_HEAD(&journal->j_dirty_buffers); 27891da177e4SLinus Torvalds spin_lock_init(&journal->j_dirty_buffers_lock); 27901da177e4SLinus Torvalds 27911da177e4SLinus Torvalds journal->j_start = 0; 27921da177e4SLinus Torvalds journal->j_len = 0; 27931da177e4SLinus Torvalds journal->j_len_alloc = 0; 27941da177e4SLinus Torvalds atomic_set(&(journal->j_wcount), 0); 27951da177e4SLinus Torvalds atomic_set(&(journal->j_async_throttle), 0); 27961da177e4SLinus Torvalds journal->j_bcount = 0; 27971da177e4SLinus Torvalds journal->j_trans_start_time = 0; 27981da177e4SLinus Torvalds journal->j_last = NULL; 27991da177e4SLinus Torvalds journal->j_first = NULL; 28001da177e4SLinus Torvalds init_waitqueue_head(&(journal->j_join_wait)); 2801f68215c4SJeff Mahoney mutex_init(&journal->j_mutex); 2802afe70259SJeff Mahoney mutex_init(&journal->j_flush_mutex); 28031da177e4SLinus Torvalds 28041da177e4SLinus Torvalds journal->j_trans_id = 10; 28051da177e4SLinus Torvalds journal->j_mount_id = 10; 28061da177e4SLinus Torvalds journal->j_state = 0; 28071da177e4SLinus Torvalds atomic_set(&(journal->j_jlock), 0); 28081da177e4SLinus Torvalds journal->j_cnode_free_list = allocate_cnodes(num_cnodes); 28091da177e4SLinus Torvalds journal->j_cnode_free_orig = journal->j_cnode_free_list; 28101da177e4SLinus Torvalds journal->j_cnode_free = journal->j_cnode_free_list ? num_cnodes : 0; 28111da177e4SLinus Torvalds journal->j_cnode_used = 0; 28121da177e4SLinus Torvalds journal->j_must_wait = 0; 28131da177e4SLinus Torvalds 2814576f6d79SJeff Mahoney if (journal->j_cnode_free == 0) { 2815a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-2004", "Journal cnode memory " 2816576f6d79SJeff Mahoney "allocation failed (%ld bytes). Journal is " 2817576f6d79SJeff Mahoney "too large for available memory. Usually " 2818576f6d79SJeff Mahoney "this is due to a journal that is too large.", 2819576f6d79SJeff Mahoney sizeof (struct reiserfs_journal_cnode) * num_cnodes); 2820576f6d79SJeff Mahoney goto free_and_return; 2821576f6d79SJeff Mahoney } 2822576f6d79SJeff Mahoney 2823a9dd3643SJeff Mahoney init_journal_hash(sb); 28241da177e4SLinus Torvalds jl = journal->j_current_jl; 282537c69b98SFrederic Weisbecker 282637c69b98SFrederic Weisbecker /* 282737c69b98SFrederic Weisbecker * get_list_bitmap() may call flush_commit_list() which 282837c69b98SFrederic Weisbecker * requires the lock. Calling flush_commit_list() shouldn't happen 282937c69b98SFrederic Weisbecker * this early but I like to be paranoid. 283037c69b98SFrederic Weisbecker */ 283137c69b98SFrederic Weisbecker reiserfs_write_lock(sb); 2832a9dd3643SJeff Mahoney jl->j_list_bitmap = get_list_bitmap(sb, jl); 283337c69b98SFrederic Weisbecker reiserfs_write_unlock(sb); 28341da177e4SLinus Torvalds if (!jl->j_list_bitmap) { 2835a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-2005", 283645b03d5eSJeff Mahoney "get_list_bitmap failed for journal list 0"); 28371da177e4SLinus Torvalds goto free_and_return; 28381da177e4SLinus Torvalds } 283937c69b98SFrederic Weisbecker 284037c69b98SFrederic Weisbecker ret = journal_read(sb); 284137c69b98SFrederic Weisbecker if (ret < 0) { 2842a9dd3643SJeff Mahoney reiserfs_warning(sb, "reiserfs-2006", 284345b03d5eSJeff Mahoney "Replay Failure, unable to mount"); 28441da177e4SLinus Torvalds goto free_and_return; 28451da177e4SLinus Torvalds } 28461da177e4SLinus Torvalds 28471da177e4SLinus Torvalds reiserfs_mounted_fs_count++; 284837c69b98SFrederic Weisbecker if (reiserfs_mounted_fs_count <= 1) 284928aadf51STejun Heo commit_wq = alloc_workqueue("reiserfs", WQ_MEM_RECLAIM, 0); 28501da177e4SLinus Torvalds 2851c4028958SDavid Howells INIT_DELAYED_WORK(&journal->j_work, flush_async_commits); 2852a9dd3643SJeff Mahoney journal->j_work_sb = sb; 28531da177e4SLinus Torvalds return 0; 28541da177e4SLinus Torvalds free_and_return: 2855a9dd3643SJeff Mahoney free_journal_ram(sb); 28561da177e4SLinus Torvalds return 1; 28571da177e4SLinus Torvalds } 28581da177e4SLinus Torvalds 28591da177e4SLinus Torvalds /* 28601da177e4SLinus Torvalds ** test for a polite end of the current transaction. Used by file_write, and should 28611da177e4SLinus Torvalds ** be used by delete to make sure they don't write more than can fit inside a single 28621da177e4SLinus Torvalds ** transaction 28631da177e4SLinus Torvalds */ 2864bd4c625cSLinus Torvalds int journal_transaction_should_end(struct reiserfs_transaction_handle *th, 2865bd4c625cSLinus Torvalds int new_alloc) 2866bd4c625cSLinus Torvalds { 28671da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(th->t_super); 28681da177e4SLinus Torvalds time_t now = get_seconds(); 28691da177e4SLinus Torvalds /* cannot restart while nested */ 28701da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 28711da177e4SLinus Torvalds if (th->t_refcount > 1) 28721da177e4SLinus Torvalds return 0; 28731da177e4SLinus Torvalds if (journal->j_must_wait > 0 || 28741da177e4SLinus Torvalds (journal->j_len_alloc + new_alloc) >= journal->j_max_batch || 28751da177e4SLinus Torvalds atomic_read(&(journal->j_jlock)) || 28761da177e4SLinus Torvalds (now - journal->j_trans_start_time) > journal->j_max_trans_age || 28771da177e4SLinus Torvalds journal->j_cnode_free < (journal->j_trans_max * 3)) { 28781da177e4SLinus Torvalds return 1; 28791da177e4SLinus Torvalds } 2880b18c1c6eSDavidlohr Bueso 28816ae1ea44SChris Mason journal->j_len_alloc += new_alloc; 28826ae1ea44SChris Mason th->t_blocks_allocated += new_alloc ; 28831da177e4SLinus Torvalds return 0; 28841da177e4SLinus Torvalds } 28851da177e4SLinus Torvalds 2886b18c1c6eSDavidlohr Bueso /* this must be called inside a transaction 28871da177e4SLinus Torvalds */ 2888bd4c625cSLinus Torvalds void reiserfs_block_writes(struct reiserfs_transaction_handle *th) 2889bd4c625cSLinus Torvalds { 28901da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(th->t_super); 28911da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 28921da177e4SLinus Torvalds journal->j_must_wait = 1; 28931da177e4SLinus Torvalds set_bit(J_WRITERS_BLOCKED, &journal->j_state); 28941da177e4SLinus Torvalds return; 28951da177e4SLinus Torvalds } 28961da177e4SLinus Torvalds 2897b18c1c6eSDavidlohr Bueso /* this must be called without a transaction started 28981da177e4SLinus Torvalds */ 2899bd4c625cSLinus Torvalds void reiserfs_allow_writes(struct super_block *s) 2900bd4c625cSLinus Torvalds { 29011da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 29021da177e4SLinus Torvalds clear_bit(J_WRITERS_BLOCKED, &journal->j_state); 29031da177e4SLinus Torvalds wake_up(&journal->j_join_wait); 29041da177e4SLinus Torvalds } 29051da177e4SLinus Torvalds 2906b18c1c6eSDavidlohr Bueso /* this must be called without a transaction started 29071da177e4SLinus Torvalds */ 2908bd4c625cSLinus Torvalds void reiserfs_wait_on_write_block(struct super_block *s) 2909bd4c625cSLinus Torvalds { 29101da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 29111da177e4SLinus Torvalds wait_event(journal->j_join_wait, 29121da177e4SLinus Torvalds !test_bit(J_WRITERS_BLOCKED, &journal->j_state)); 29131da177e4SLinus Torvalds } 29141da177e4SLinus Torvalds 2915bd4c625cSLinus Torvalds static void queue_log_writer(struct super_block *s) 2916bd4c625cSLinus Torvalds { 29171da177e4SLinus Torvalds wait_queue_t wait; 29181da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 29191da177e4SLinus Torvalds set_bit(J_WRITERS_QUEUED, &journal->j_state); 29201da177e4SLinus Torvalds 29211da177e4SLinus Torvalds /* 29221da177e4SLinus Torvalds * we don't want to use wait_event here because 29231da177e4SLinus Torvalds * we only want to wait once. 29241da177e4SLinus Torvalds */ 29251da177e4SLinus Torvalds init_waitqueue_entry(&wait, current); 29261da177e4SLinus Torvalds add_wait_queue(&journal->j_join_wait, &wait); 29271da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 29288ebc4232SFrederic Weisbecker if (test_bit(J_WRITERS_QUEUED, &journal->j_state)) { 2929278f6679SJeff Mahoney int depth = reiserfs_write_unlock_nested(s); 29301da177e4SLinus Torvalds schedule(); 2931278f6679SJeff Mahoney reiserfs_write_lock_nested(s, depth); 29328ebc4232SFrederic Weisbecker } 29335ab2f7e0SMilind Arun Choudhary __set_current_state(TASK_RUNNING); 29341da177e4SLinus Torvalds remove_wait_queue(&journal->j_join_wait, &wait); 29351da177e4SLinus Torvalds } 29361da177e4SLinus Torvalds 2937bd4c625cSLinus Torvalds static void wake_queued_writers(struct super_block *s) 2938bd4c625cSLinus Torvalds { 29391da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(s); 29401da177e4SLinus Torvalds if (test_and_clear_bit(J_WRITERS_QUEUED, &journal->j_state)) 29411da177e4SLinus Torvalds wake_up(&journal->j_join_wait); 29421da177e4SLinus Torvalds } 29431da177e4SLinus Torvalds 2944600ed416SJeff Mahoney static void let_transaction_grow(struct super_block *sb, unsigned int trans_id) 29451da177e4SLinus Torvalds { 29461da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(sb); 29471da177e4SLinus Torvalds unsigned long bcount = journal->j_bcount; 29481da177e4SLinus Torvalds while (1) { 2949278f6679SJeff Mahoney int depth; 2950278f6679SJeff Mahoney 2951278f6679SJeff Mahoney depth = reiserfs_write_unlock_nested(sb); 2952041e0e3bSNishanth Aravamudan schedule_timeout_uninterruptible(1); 2953278f6679SJeff Mahoney reiserfs_write_lock_nested(sb, depth); 2954278f6679SJeff Mahoney 29551da177e4SLinus Torvalds journal->j_current_jl->j_state |= LIST_COMMIT_PENDING; 29561da177e4SLinus Torvalds while ((atomic_read(&journal->j_wcount) > 0 || 29571da177e4SLinus Torvalds atomic_read(&journal->j_jlock)) && 29581da177e4SLinus Torvalds journal->j_trans_id == trans_id) { 29591da177e4SLinus Torvalds queue_log_writer(sb); 29601da177e4SLinus Torvalds } 29611da177e4SLinus Torvalds if (journal->j_trans_id != trans_id) 29621da177e4SLinus Torvalds break; 29631da177e4SLinus Torvalds if (bcount == journal->j_bcount) 29641da177e4SLinus Torvalds break; 29651da177e4SLinus Torvalds bcount = journal->j_bcount; 29661da177e4SLinus Torvalds } 29671da177e4SLinus Torvalds } 29681da177e4SLinus Torvalds 29691da177e4SLinus Torvalds /* join == true if you must join an existing transaction. 29701da177e4SLinus Torvalds ** join == false if you can deal with waiting for others to finish 29711da177e4SLinus Torvalds ** 29721da177e4SLinus Torvalds ** this will block until the transaction is joinable. send the number of blocks you 29731da177e4SLinus Torvalds ** expect to use in nblocks. 29741da177e4SLinus Torvalds */ 2975bd4c625cSLinus Torvalds static int do_journal_begin_r(struct reiserfs_transaction_handle *th, 2976a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks, 2977bd4c625cSLinus Torvalds int join) 2978bd4c625cSLinus Torvalds { 29791da177e4SLinus Torvalds time_t now = get_seconds(); 2980600ed416SJeff Mahoney unsigned int old_trans_id; 2981a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 29821da177e4SLinus Torvalds struct reiserfs_transaction_handle myth; 29831da177e4SLinus Torvalds int sched_count = 0; 29841da177e4SLinus Torvalds int retval; 2985278f6679SJeff Mahoney int depth; 29861da177e4SLinus Torvalds 2987a9dd3643SJeff Mahoney reiserfs_check_lock_depth(sb, "journal_begin"); 298814a61442SEric Sesterhenn BUG_ON(nblocks > journal->j_trans_max); 29891da177e4SLinus Torvalds 2990a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.journal_being); 29911da177e4SLinus Torvalds /* set here for journal_join */ 29921da177e4SLinus Torvalds th->t_refcount = 1; 2993a9dd3643SJeff Mahoney th->t_super = sb; 29941da177e4SLinus Torvalds 29951da177e4SLinus Torvalds relock: 2996a9dd3643SJeff Mahoney lock_journal(sb); 29971da177e4SLinus Torvalds if (join != JBEGIN_ABORT && reiserfs_is_journal_aborted(journal)) { 2998a9dd3643SJeff Mahoney unlock_journal(sb); 29991da177e4SLinus Torvalds retval = journal->j_errno; 30001da177e4SLinus Torvalds goto out_fail; 30011da177e4SLinus Torvalds } 30021da177e4SLinus Torvalds journal->j_bcount++; 30031da177e4SLinus Torvalds 30041da177e4SLinus Torvalds if (test_bit(J_WRITERS_BLOCKED, &journal->j_state)) { 3005a9dd3643SJeff Mahoney unlock_journal(sb); 3006278f6679SJeff Mahoney depth = reiserfs_write_unlock_nested(sb); 3007a9dd3643SJeff Mahoney reiserfs_wait_on_write_block(sb); 3008278f6679SJeff Mahoney reiserfs_write_lock_nested(sb, depth); 3009a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.journal_relock_writers); 30101da177e4SLinus Torvalds goto relock; 30111da177e4SLinus Torvalds } 30121da177e4SLinus Torvalds now = get_seconds(); 30131da177e4SLinus Torvalds 30141da177e4SLinus Torvalds /* if there is no room in the journal OR 30151da177e4SLinus Torvalds ** if this transaction is too old, and we weren't called joinable, wait for it to finish before beginning 30161da177e4SLinus Torvalds ** we don't sleep if there aren't other writers 30171da177e4SLinus Torvalds */ 30181da177e4SLinus Torvalds 30191da177e4SLinus Torvalds if ((!join && journal->j_must_wait > 0) || 3020bd4c625cSLinus Torvalds (!join 3021bd4c625cSLinus Torvalds && (journal->j_len_alloc + nblocks + 2) >= journal->j_max_batch) 3022bd4c625cSLinus Torvalds || (!join && atomic_read(&journal->j_wcount) > 0 3023bd4c625cSLinus Torvalds && journal->j_trans_start_time > 0 3024bd4c625cSLinus Torvalds && (now - journal->j_trans_start_time) > 3025bd4c625cSLinus Torvalds journal->j_max_trans_age) || (!join 3026bd4c625cSLinus Torvalds && atomic_read(&journal->j_jlock)) 3027bd4c625cSLinus Torvalds || (!join && journal->j_cnode_free < (journal->j_trans_max * 3))) { 30281da177e4SLinus Torvalds 30291da177e4SLinus Torvalds old_trans_id = journal->j_trans_id; 3030a9dd3643SJeff Mahoney unlock_journal(sb); /* allow others to finish this transaction */ 30311da177e4SLinus Torvalds 30321da177e4SLinus Torvalds if (!join && (journal->j_len_alloc + nblocks + 2) >= 30331da177e4SLinus Torvalds journal->j_max_batch && 3034bd4c625cSLinus Torvalds ((journal->j_len + nblocks + 2) * 100) < 3035bd4c625cSLinus Torvalds (journal->j_len_alloc * 75)) { 30361da177e4SLinus Torvalds if (atomic_read(&journal->j_wcount) > 10) { 30371da177e4SLinus Torvalds sched_count++; 3038a9dd3643SJeff Mahoney queue_log_writer(sb); 30391da177e4SLinus Torvalds goto relock; 30401da177e4SLinus Torvalds } 30411da177e4SLinus Torvalds } 30421da177e4SLinus Torvalds /* don't mess with joining the transaction if all we have to do is 30431da177e4SLinus Torvalds * wait for someone else to do a commit 30441da177e4SLinus Torvalds */ 30451da177e4SLinus Torvalds if (atomic_read(&journal->j_jlock)) { 30461da177e4SLinus Torvalds while (journal->j_trans_id == old_trans_id && 30471da177e4SLinus Torvalds atomic_read(&journal->j_jlock)) { 3048a9dd3643SJeff Mahoney queue_log_writer(sb); 30491da177e4SLinus Torvalds } 30501da177e4SLinus Torvalds goto relock; 30511da177e4SLinus Torvalds } 3052a9dd3643SJeff Mahoney retval = journal_join(&myth, sb, 1); 30531da177e4SLinus Torvalds if (retval) 30541da177e4SLinus Torvalds goto out_fail; 30551da177e4SLinus Torvalds 30561da177e4SLinus Torvalds /* someone might have ended the transaction while we joined */ 30571da177e4SLinus Torvalds if (old_trans_id != journal->j_trans_id) { 3058a9dd3643SJeff Mahoney retval = do_journal_end(&myth, sb, 1, 0); 30591da177e4SLinus Torvalds } else { 3060a9dd3643SJeff Mahoney retval = do_journal_end(&myth, sb, 1, COMMIT_NOW); 30611da177e4SLinus Torvalds } 30621da177e4SLinus Torvalds 30631da177e4SLinus Torvalds if (retval) 30641da177e4SLinus Torvalds goto out_fail; 30651da177e4SLinus Torvalds 3066a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.journal_relock_wcount); 30671da177e4SLinus Torvalds goto relock; 30681da177e4SLinus Torvalds } 30691da177e4SLinus Torvalds /* we are the first writer, set trans_id */ 30701da177e4SLinus Torvalds if (journal->j_trans_start_time == 0) { 30711da177e4SLinus Torvalds journal->j_trans_start_time = get_seconds(); 30721da177e4SLinus Torvalds } 30731da177e4SLinus Torvalds atomic_inc(&(journal->j_wcount)); 30741da177e4SLinus Torvalds journal->j_len_alloc += nblocks; 30751da177e4SLinus Torvalds th->t_blocks_logged = 0; 30761da177e4SLinus Torvalds th->t_blocks_allocated = nblocks; 30771da177e4SLinus Torvalds th->t_trans_id = journal->j_trans_id; 3078a9dd3643SJeff Mahoney unlock_journal(sb); 30791da177e4SLinus Torvalds INIT_LIST_HEAD(&th->t_list); 30801da177e4SLinus Torvalds return 0; 30811da177e4SLinus Torvalds 30821da177e4SLinus Torvalds out_fail: 30831da177e4SLinus Torvalds memset(th, 0, sizeof(*th)); 30841da177e4SLinus Torvalds /* Re-set th->t_super, so we can properly keep track of how many 30851da177e4SLinus Torvalds * persistent transactions there are. We need to do this so if this 30861da177e4SLinus Torvalds * call is part of a failed restart_transaction, we can free it later */ 3087a9dd3643SJeff Mahoney th->t_super = sb; 30881da177e4SLinus Torvalds return retval; 30891da177e4SLinus Torvalds } 30901da177e4SLinus Torvalds 3091bd4c625cSLinus Torvalds struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct 3092bd4c625cSLinus Torvalds super_block 3093bd4c625cSLinus Torvalds *s, 3094bd4c625cSLinus Torvalds int nblocks) 3095bd4c625cSLinus Torvalds { 30961da177e4SLinus Torvalds int ret; 30971da177e4SLinus Torvalds struct reiserfs_transaction_handle *th; 30981da177e4SLinus Torvalds 30991da177e4SLinus Torvalds /* if we're nesting into an existing transaction. It will be 31001da177e4SLinus Torvalds ** persistent on its own 31011da177e4SLinus Torvalds */ 31021da177e4SLinus Torvalds if (reiserfs_transaction_running(s)) { 31031da177e4SLinus Torvalds th = current->journal_info; 31041da177e4SLinus Torvalds th->t_refcount++; 310514a61442SEric Sesterhenn BUG_ON(th->t_refcount < 2); 310614a61442SEric Sesterhenn 31071da177e4SLinus Torvalds return th; 31081da177e4SLinus Torvalds } 3109d739b42bSPekka Enberg th = kmalloc(sizeof(struct reiserfs_transaction_handle), GFP_NOFS); 31101da177e4SLinus Torvalds if (!th) 31111da177e4SLinus Torvalds return NULL; 31121da177e4SLinus Torvalds ret = journal_begin(th, s, nblocks); 31131da177e4SLinus Torvalds if (ret) { 3114d739b42bSPekka Enberg kfree(th); 31151da177e4SLinus Torvalds return NULL; 31161da177e4SLinus Torvalds } 31171da177e4SLinus Torvalds 31181da177e4SLinus Torvalds SB_JOURNAL(s)->j_persistent_trans++; 31191da177e4SLinus Torvalds return th; 31201da177e4SLinus Torvalds } 31211da177e4SLinus Torvalds 3122bd4c625cSLinus Torvalds int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *th) 3123bd4c625cSLinus Torvalds { 31241da177e4SLinus Torvalds struct super_block *s = th->t_super; 31251da177e4SLinus Torvalds int ret = 0; 31261da177e4SLinus Torvalds if (th->t_trans_id) 31271da177e4SLinus Torvalds ret = journal_end(th, th->t_super, th->t_blocks_allocated); 31281da177e4SLinus Torvalds else 31291da177e4SLinus Torvalds ret = -EIO; 31301da177e4SLinus Torvalds if (th->t_refcount == 0) { 31311da177e4SLinus Torvalds SB_JOURNAL(s)->j_persistent_trans--; 3132d739b42bSPekka Enberg kfree(th); 31331da177e4SLinus Torvalds } 31341da177e4SLinus Torvalds return ret; 31351da177e4SLinus Torvalds } 31361da177e4SLinus Torvalds 3137bd4c625cSLinus Torvalds static int journal_join(struct reiserfs_transaction_handle *th, 3138a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks) 3139bd4c625cSLinus Torvalds { 31401da177e4SLinus Torvalds struct reiserfs_transaction_handle *cur_th = current->journal_info; 31411da177e4SLinus Torvalds 31421da177e4SLinus Torvalds /* this keeps do_journal_end from NULLing out the current->journal_info 31431da177e4SLinus Torvalds ** pointer 31441da177e4SLinus Torvalds */ 31451da177e4SLinus Torvalds th->t_handle_save = cur_th; 314614a61442SEric Sesterhenn BUG_ON(cur_th && cur_th->t_refcount > 1); 3147a9dd3643SJeff Mahoney return do_journal_begin_r(th, sb, nblocks, JBEGIN_JOIN); 31481da177e4SLinus Torvalds } 31491da177e4SLinus Torvalds 3150bd4c625cSLinus Torvalds int journal_join_abort(struct reiserfs_transaction_handle *th, 3151a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks) 3152bd4c625cSLinus Torvalds { 31531da177e4SLinus Torvalds struct reiserfs_transaction_handle *cur_th = current->journal_info; 31541da177e4SLinus Torvalds 31551da177e4SLinus Torvalds /* this keeps do_journal_end from NULLing out the current->journal_info 31561da177e4SLinus Torvalds ** pointer 31571da177e4SLinus Torvalds */ 31581da177e4SLinus Torvalds th->t_handle_save = cur_th; 315914a61442SEric Sesterhenn BUG_ON(cur_th && cur_th->t_refcount > 1); 3160a9dd3643SJeff Mahoney return do_journal_begin_r(th, sb, nblocks, JBEGIN_ABORT); 31611da177e4SLinus Torvalds } 31621da177e4SLinus Torvalds 3163bd4c625cSLinus Torvalds int journal_begin(struct reiserfs_transaction_handle *th, 3164a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks) 3165bd4c625cSLinus Torvalds { 31661da177e4SLinus Torvalds struct reiserfs_transaction_handle *cur_th = current->journal_info; 31671da177e4SLinus Torvalds int ret; 31681da177e4SLinus Torvalds 31691da177e4SLinus Torvalds th->t_handle_save = NULL; 31701da177e4SLinus Torvalds if (cur_th) { 31711da177e4SLinus Torvalds /* we are nesting into the current transaction */ 3172a9dd3643SJeff Mahoney if (cur_th->t_super == sb) { 31731da177e4SLinus Torvalds BUG_ON(!cur_th->t_refcount); 31741da177e4SLinus Torvalds cur_th->t_refcount++; 31751da177e4SLinus Torvalds memcpy(th, cur_th, sizeof(*th)); 31761da177e4SLinus Torvalds if (th->t_refcount <= 1) 3177a9dd3643SJeff Mahoney reiserfs_warning(sb, "reiserfs-2005", 317845b03d5eSJeff Mahoney "BAD: refcount <= 1, but " 317945b03d5eSJeff Mahoney "journal_info != 0"); 31801da177e4SLinus Torvalds return 0; 31811da177e4SLinus Torvalds } else { 31821da177e4SLinus Torvalds /* we've ended up with a handle from a different filesystem. 31831da177e4SLinus Torvalds ** save it and restore on journal_end. This should never 31841da177e4SLinus Torvalds ** really happen... 31851da177e4SLinus Torvalds */ 3186a9dd3643SJeff Mahoney reiserfs_warning(sb, "clm-2100", 318745b03d5eSJeff Mahoney "nesting info a different FS"); 31881da177e4SLinus Torvalds th->t_handle_save = current->journal_info; 31891da177e4SLinus Torvalds current->journal_info = th; 31901da177e4SLinus Torvalds } 31911da177e4SLinus Torvalds } else { 31921da177e4SLinus Torvalds current->journal_info = th; 31931da177e4SLinus Torvalds } 3194a9dd3643SJeff Mahoney ret = do_journal_begin_r(th, sb, nblocks, JBEGIN_REG); 319514a61442SEric Sesterhenn BUG_ON(current->journal_info != th); 31961da177e4SLinus Torvalds 31971da177e4SLinus Torvalds /* I guess this boils down to being the reciprocal of clm-2100 above. 31981da177e4SLinus Torvalds * If do_journal_begin_r fails, we need to put it back, since journal_end 31991da177e4SLinus Torvalds * won't be called to do it. */ 32001da177e4SLinus Torvalds if (ret) 32011da177e4SLinus Torvalds current->journal_info = th->t_handle_save; 32021da177e4SLinus Torvalds else 32031da177e4SLinus Torvalds BUG_ON(!th->t_refcount); 32041da177e4SLinus Torvalds 32051da177e4SLinus Torvalds return ret; 32061da177e4SLinus Torvalds } 32071da177e4SLinus Torvalds 32081da177e4SLinus Torvalds /* 32091da177e4SLinus Torvalds ** puts bh into the current transaction. If it was already there, reorders removes the 32101da177e4SLinus Torvalds ** old pointers from the hash, and puts new ones in (to make sure replay happen in the right order). 32111da177e4SLinus Torvalds ** 32121da177e4SLinus Torvalds ** if it was dirty, cleans and files onto the clean list. I can't let it be dirty again until the 32131da177e4SLinus Torvalds ** transaction is committed. 32141da177e4SLinus Torvalds ** 32151da177e4SLinus Torvalds ** if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len. 32161da177e4SLinus Torvalds */ 3217bd4c625cSLinus Torvalds int journal_mark_dirty(struct reiserfs_transaction_handle *th, 3218a9dd3643SJeff Mahoney struct super_block *sb, struct buffer_head *bh) 3219bd4c625cSLinus Torvalds { 3220a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 32211da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn = NULL; 32221da177e4SLinus Torvalds int count_already_incd = 0; 32231da177e4SLinus Torvalds int prepared = 0; 32241da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 32251da177e4SLinus Torvalds 3226a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.mark_dirty); 32271da177e4SLinus Torvalds if (th->t_trans_id != journal->j_trans_id) { 3228c3a9c210SJeff Mahoney reiserfs_panic(th->t_super, "journal-1577", 3229c3a9c210SJeff Mahoney "handle trans id %ld != current trans id %ld", 32301da177e4SLinus Torvalds th->t_trans_id, journal->j_trans_id); 32311da177e4SLinus Torvalds } 32321da177e4SLinus Torvalds 32331da177e4SLinus Torvalds prepared = test_clear_buffer_journal_prepared(bh); 32341da177e4SLinus Torvalds clear_buffer_journal_restore_dirty(bh); 32351da177e4SLinus Torvalds /* already in this transaction, we are done */ 32361da177e4SLinus Torvalds if (buffer_journaled(bh)) { 3237a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.mark_dirty_already); 32381da177e4SLinus Torvalds return 0; 32391da177e4SLinus Torvalds } 32401da177e4SLinus Torvalds 32411da177e4SLinus Torvalds /* this must be turned into a panic instead of a warning. We can't allow 32421da177e4SLinus Torvalds ** a dirty or journal_dirty or locked buffer to be logged, as some changes 32431da177e4SLinus Torvalds ** could get to disk too early. NOT GOOD. 32441da177e4SLinus Torvalds */ 32451da177e4SLinus Torvalds if (!prepared || buffer_dirty(bh)) { 3246a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1777", 324745b03d5eSJeff Mahoney "buffer %llu bad state " 32481da177e4SLinus Torvalds "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT", 3249bd4c625cSLinus Torvalds (unsigned long long)bh->b_blocknr, 3250bd4c625cSLinus Torvalds prepared ? ' ' : '!', 32511da177e4SLinus Torvalds buffer_locked(bh) ? ' ' : '!', 32521da177e4SLinus Torvalds buffer_dirty(bh) ? ' ' : '!', 32531da177e4SLinus Torvalds buffer_journal_dirty(bh) ? ' ' : '!'); 32541da177e4SLinus Torvalds } 32551da177e4SLinus Torvalds 32561da177e4SLinus Torvalds if (atomic_read(&(journal->j_wcount)) <= 0) { 3257a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1409", 325845b03d5eSJeff Mahoney "returning because j_wcount was %d", 3259bd4c625cSLinus Torvalds atomic_read(&(journal->j_wcount))); 32601da177e4SLinus Torvalds return 1; 32611da177e4SLinus Torvalds } 32621da177e4SLinus Torvalds /* this error means I've screwed up, and we've overflowed the transaction. 32631da177e4SLinus Torvalds ** Nothing can be done here, except make the FS readonly or panic. 32641da177e4SLinus Torvalds */ 32651da177e4SLinus Torvalds if (journal->j_len >= journal->j_trans_max) { 3266c3a9c210SJeff Mahoney reiserfs_panic(th->t_super, "journal-1413", 3267c3a9c210SJeff Mahoney "j_len (%lu) is too big", 3268bd4c625cSLinus Torvalds journal->j_len); 32691da177e4SLinus Torvalds } 32701da177e4SLinus Torvalds 32711da177e4SLinus Torvalds if (buffer_journal_dirty(bh)) { 32721da177e4SLinus Torvalds count_already_incd = 1; 3273a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.mark_dirty_notjournal); 32741da177e4SLinus Torvalds clear_buffer_journal_dirty(bh); 32751da177e4SLinus Torvalds } 32761da177e4SLinus Torvalds 32771da177e4SLinus Torvalds if (journal->j_len > journal->j_len_alloc) { 32781da177e4SLinus Torvalds journal->j_len_alloc = journal->j_len + JOURNAL_PER_BALANCE_CNT; 32791da177e4SLinus Torvalds } 32801da177e4SLinus Torvalds 32811da177e4SLinus Torvalds set_buffer_journaled(bh); 32821da177e4SLinus Torvalds 32831da177e4SLinus Torvalds /* now put this guy on the end */ 32841da177e4SLinus Torvalds if (!cn) { 3285a9dd3643SJeff Mahoney cn = get_cnode(sb); 32861da177e4SLinus Torvalds if (!cn) { 3287a9dd3643SJeff Mahoney reiserfs_panic(sb, "journal-4", "get_cnode failed!"); 32881da177e4SLinus Torvalds } 32891da177e4SLinus Torvalds 32901da177e4SLinus Torvalds if (th->t_blocks_logged == th->t_blocks_allocated) { 32911da177e4SLinus Torvalds th->t_blocks_allocated += JOURNAL_PER_BALANCE_CNT; 32921da177e4SLinus Torvalds journal->j_len_alloc += JOURNAL_PER_BALANCE_CNT; 32931da177e4SLinus Torvalds } 32941da177e4SLinus Torvalds th->t_blocks_logged++; 32951da177e4SLinus Torvalds journal->j_len++; 32961da177e4SLinus Torvalds 32971da177e4SLinus Torvalds cn->bh = bh; 32981da177e4SLinus Torvalds cn->blocknr = bh->b_blocknr; 3299a9dd3643SJeff Mahoney cn->sb = sb; 33001da177e4SLinus Torvalds cn->jlist = NULL; 33011da177e4SLinus Torvalds insert_journal_hash(journal->j_hash_table, cn); 33021da177e4SLinus Torvalds if (!count_already_incd) { 33031da177e4SLinus Torvalds get_bh(bh); 33041da177e4SLinus Torvalds } 33051da177e4SLinus Torvalds } 33061da177e4SLinus Torvalds cn->next = NULL; 33071da177e4SLinus Torvalds cn->prev = journal->j_last; 33081da177e4SLinus Torvalds cn->bh = bh; 33091da177e4SLinus Torvalds if (journal->j_last) { 33101da177e4SLinus Torvalds journal->j_last->next = cn; 33111da177e4SLinus Torvalds journal->j_last = cn; 33121da177e4SLinus Torvalds } else { 33131da177e4SLinus Torvalds journal->j_first = cn; 33141da177e4SLinus Torvalds journal->j_last = cn; 33151da177e4SLinus Torvalds } 3316033369d1SArtem Bityutskiy reiserfs_schedule_old_flush(sb); 33171da177e4SLinus Torvalds return 0; 33181da177e4SLinus Torvalds } 33191da177e4SLinus Torvalds 3320bd4c625cSLinus Torvalds int journal_end(struct reiserfs_transaction_handle *th, 3321a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks) 3322bd4c625cSLinus Torvalds { 33231da177e4SLinus Torvalds if (!current->journal_info && th->t_refcount > 1) 3324a9dd3643SJeff Mahoney reiserfs_warning(sb, "REISER-NESTING", 332545b03d5eSJeff Mahoney "th NULL, refcount %d", th->t_refcount); 33261da177e4SLinus Torvalds 33271da177e4SLinus Torvalds if (!th->t_trans_id) { 33281da177e4SLinus Torvalds WARN_ON(1); 33291da177e4SLinus Torvalds return -EIO; 33301da177e4SLinus Torvalds } 33311da177e4SLinus Torvalds 33321da177e4SLinus Torvalds th->t_refcount--; 33331da177e4SLinus Torvalds if (th->t_refcount > 0) { 3334bd4c625cSLinus Torvalds struct reiserfs_transaction_handle *cur_th = 3335bd4c625cSLinus Torvalds current->journal_info; 33361da177e4SLinus Torvalds 33371da177e4SLinus Torvalds /* we aren't allowed to close a nested transaction on a different 33381da177e4SLinus Torvalds ** filesystem from the one in the task struct 33391da177e4SLinus Torvalds */ 334014a61442SEric Sesterhenn BUG_ON(cur_th->t_super != th->t_super); 33411da177e4SLinus Torvalds 33421da177e4SLinus Torvalds if (th != cur_th) { 33431da177e4SLinus Torvalds memcpy(current->journal_info, th, sizeof(*th)); 33441da177e4SLinus Torvalds th->t_trans_id = 0; 33451da177e4SLinus Torvalds } 33461da177e4SLinus Torvalds return 0; 33471da177e4SLinus Torvalds } else { 3348a9dd3643SJeff Mahoney return do_journal_end(th, sb, nblocks, 0); 33491da177e4SLinus Torvalds } 33501da177e4SLinus Torvalds } 33511da177e4SLinus Torvalds 33521da177e4SLinus Torvalds /* removes from the current transaction, relsing and descrementing any counters. 33531da177e4SLinus Torvalds ** also files the removed buffer directly onto the clean list 33541da177e4SLinus Torvalds ** 33551da177e4SLinus Torvalds ** called by journal_mark_freed when a block has been deleted 33561da177e4SLinus Torvalds ** 33571da177e4SLinus Torvalds ** returns 1 if it cleaned and relsed the buffer. 0 otherwise 33581da177e4SLinus Torvalds */ 3359a9dd3643SJeff Mahoney static int remove_from_transaction(struct super_block *sb, 3360bd4c625cSLinus Torvalds b_blocknr_t blocknr, int already_cleaned) 3361bd4c625cSLinus Torvalds { 33621da177e4SLinus Torvalds struct buffer_head *bh; 33631da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 3364a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 33651da177e4SLinus Torvalds int ret = 0; 33661da177e4SLinus Torvalds 3367a9dd3643SJeff Mahoney cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr); 33681da177e4SLinus Torvalds if (!cn || !cn->bh) { 33691da177e4SLinus Torvalds return ret; 33701da177e4SLinus Torvalds } 33711da177e4SLinus Torvalds bh = cn->bh; 33721da177e4SLinus Torvalds if (cn->prev) { 33731da177e4SLinus Torvalds cn->prev->next = cn->next; 33741da177e4SLinus Torvalds } 33751da177e4SLinus Torvalds if (cn->next) { 33761da177e4SLinus Torvalds cn->next->prev = cn->prev; 33771da177e4SLinus Torvalds } 33781da177e4SLinus Torvalds if (cn == journal->j_first) { 33791da177e4SLinus Torvalds journal->j_first = cn->next; 33801da177e4SLinus Torvalds } 33811da177e4SLinus Torvalds if (cn == journal->j_last) { 33821da177e4SLinus Torvalds journal->j_last = cn->prev; 33831da177e4SLinus Torvalds } 33841da177e4SLinus Torvalds if (bh) 3385a9dd3643SJeff Mahoney remove_journal_hash(sb, journal->j_hash_table, NULL, 3386bd4c625cSLinus Torvalds bh->b_blocknr, 0); 33871da177e4SLinus Torvalds clear_buffer_journaled(bh); /* don't log this one */ 33881da177e4SLinus Torvalds 33891da177e4SLinus Torvalds if (!already_cleaned) { 33901da177e4SLinus Torvalds clear_buffer_journal_dirty(bh); 33911da177e4SLinus Torvalds clear_buffer_dirty(bh); 33921da177e4SLinus Torvalds clear_buffer_journal_test(bh); 33931da177e4SLinus Torvalds put_bh(bh); 33941da177e4SLinus Torvalds if (atomic_read(&(bh->b_count)) < 0) { 3395a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-1752", 339645b03d5eSJeff Mahoney "b_count < 0"); 33971da177e4SLinus Torvalds } 33981da177e4SLinus Torvalds ret = 1; 33991da177e4SLinus Torvalds } 34001da177e4SLinus Torvalds journal->j_len--; 34011da177e4SLinus Torvalds journal->j_len_alloc--; 3402a9dd3643SJeff Mahoney free_cnode(sb, cn); 34031da177e4SLinus Torvalds return ret; 34041da177e4SLinus Torvalds } 34051da177e4SLinus Torvalds 34061da177e4SLinus Torvalds /* 34071da177e4SLinus Torvalds ** for any cnode in a journal list, it can only be dirtied of all the 34080779bf2dSMatt LaPlante ** transactions that include it are committed to disk. 34091da177e4SLinus Torvalds ** this checks through each transaction, and returns 1 if you are allowed to dirty, 34101da177e4SLinus Torvalds ** and 0 if you aren't 34111da177e4SLinus Torvalds ** 34121da177e4SLinus Torvalds ** it is called by dirty_journal_list, which is called after flush_commit_list has gotten all the log 34131da177e4SLinus Torvalds ** blocks for a given transaction on disk 34141da177e4SLinus Torvalds ** 34151da177e4SLinus Torvalds */ 3416bd4c625cSLinus Torvalds static int can_dirty(struct reiserfs_journal_cnode *cn) 3417bd4c625cSLinus Torvalds { 34181da177e4SLinus Torvalds struct super_block *sb = cn->sb; 34191da177e4SLinus Torvalds b_blocknr_t blocknr = cn->blocknr; 34201da177e4SLinus Torvalds struct reiserfs_journal_cnode *cur = cn->hprev; 34211da177e4SLinus Torvalds int can_dirty = 1; 34221da177e4SLinus Torvalds 34231da177e4SLinus Torvalds /* first test hprev. These are all newer than cn, so any node here 34241da177e4SLinus Torvalds ** with the same block number and dev means this node can't be sent 34251da177e4SLinus Torvalds ** to disk right now. 34261da177e4SLinus Torvalds */ 34271da177e4SLinus Torvalds while (cur && can_dirty) { 34281da177e4SLinus Torvalds if (cur->jlist && cur->bh && cur->blocknr && cur->sb == sb && 34291da177e4SLinus Torvalds cur->blocknr == blocknr) { 34301da177e4SLinus Torvalds can_dirty = 0; 34311da177e4SLinus Torvalds } 34321da177e4SLinus Torvalds cur = cur->hprev; 34331da177e4SLinus Torvalds } 34341da177e4SLinus Torvalds /* then test hnext. These are all older than cn. As long as they 34351da177e4SLinus Torvalds ** are committed to the log, it is safe to write cn to disk 34361da177e4SLinus Torvalds */ 34371da177e4SLinus Torvalds cur = cn->hnext; 34381da177e4SLinus Torvalds while (cur && can_dirty) { 34391da177e4SLinus Torvalds if (cur->jlist && cur->jlist->j_len > 0 && 34401da177e4SLinus Torvalds atomic_read(&(cur->jlist->j_commit_left)) > 0 && cur->bh && 34411da177e4SLinus Torvalds cur->blocknr && cur->sb == sb && cur->blocknr == blocknr) { 34421da177e4SLinus Torvalds can_dirty = 0; 34431da177e4SLinus Torvalds } 34441da177e4SLinus Torvalds cur = cur->hnext; 34451da177e4SLinus Torvalds } 34461da177e4SLinus Torvalds return can_dirty; 34471da177e4SLinus Torvalds } 34481da177e4SLinus Torvalds 34491da177e4SLinus Torvalds /* syncs the commit blocks, but does not force the real buffers to disk 34500779bf2dSMatt LaPlante ** will wait until the current transaction is done/committed before returning 34511da177e4SLinus Torvalds */ 3452bd4c625cSLinus Torvalds int journal_end_sync(struct reiserfs_transaction_handle *th, 3453a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks) 3454bd4c625cSLinus Torvalds { 3455a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 34561da177e4SLinus Torvalds 34571da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 34581da177e4SLinus Torvalds /* you can sync while nested, very, very bad */ 345914a61442SEric Sesterhenn BUG_ON(th->t_refcount > 1); 34601da177e4SLinus Torvalds if (journal->j_len == 0) { 3461a9dd3643SJeff Mahoney reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), 3462bd4c625cSLinus Torvalds 1); 3463a9dd3643SJeff Mahoney journal_mark_dirty(th, sb, SB_BUFFER_WITH_SB(sb)); 34641da177e4SLinus Torvalds } 3465a9dd3643SJeff Mahoney return do_journal_end(th, sb, nblocks, COMMIT_NOW | WAIT); 34661da177e4SLinus Torvalds } 34671da177e4SLinus Torvalds 34681da177e4SLinus Torvalds /* 34691da177e4SLinus Torvalds ** writeback the pending async commits to disk 34701da177e4SLinus Torvalds */ 3471c4028958SDavid Howells static void flush_async_commits(struct work_struct *work) 3472bd4c625cSLinus Torvalds { 3473c4028958SDavid Howells struct reiserfs_journal *journal = 3474c4028958SDavid Howells container_of(work, struct reiserfs_journal, j_work.work); 3475a9dd3643SJeff Mahoney struct super_block *sb = journal->j_work_sb; 34761da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 34771da177e4SLinus Torvalds struct list_head *entry; 34781da177e4SLinus Torvalds 34798ebc4232SFrederic Weisbecker reiserfs_write_lock(sb); 34801da177e4SLinus Torvalds if (!list_empty(&journal->j_journal_list)) { 34811da177e4SLinus Torvalds /* last entry is the youngest, commit it and you get everything */ 34821da177e4SLinus Torvalds entry = journal->j_journal_list.prev; 34831da177e4SLinus Torvalds jl = JOURNAL_LIST_ENTRY(entry); 3484a9dd3643SJeff Mahoney flush_commit_list(sb, jl, 1); 34851da177e4SLinus Torvalds } 34868ebc4232SFrederic Weisbecker reiserfs_write_unlock(sb); 34871da177e4SLinus Torvalds } 34881da177e4SLinus Torvalds 34891da177e4SLinus Torvalds /* 34901da177e4SLinus Torvalds ** flushes any old transactions to disk 34911da177e4SLinus Torvalds ** ends the current transaction if it is too old 34921da177e4SLinus Torvalds */ 349325729b0eSArtem Bityutskiy void reiserfs_flush_old_commits(struct super_block *sb) 3494bd4c625cSLinus Torvalds { 34951da177e4SLinus Torvalds time_t now; 34961da177e4SLinus Torvalds struct reiserfs_transaction_handle th; 3497a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 34981da177e4SLinus Torvalds 34991da177e4SLinus Torvalds now = get_seconds(); 35001da177e4SLinus Torvalds /* safety check so we don't flush while we are replaying the log during 35011da177e4SLinus Torvalds * mount 35021da177e4SLinus Torvalds */ 350325729b0eSArtem Bityutskiy if (list_empty(&journal->j_journal_list)) 350425729b0eSArtem Bityutskiy return; 35051da177e4SLinus Torvalds 35061da177e4SLinus Torvalds /* check the current transaction. If there are no writers, and it is 35071da177e4SLinus Torvalds * too old, finish it, and force the commit blocks to disk 35081da177e4SLinus Torvalds */ 35091da177e4SLinus Torvalds if (atomic_read(&journal->j_wcount) <= 0 && 35101da177e4SLinus Torvalds journal->j_trans_start_time > 0 && 35111da177e4SLinus Torvalds journal->j_len > 0 && 3512bd4c625cSLinus Torvalds (now - journal->j_trans_start_time) > journal->j_max_trans_age) { 3513a9dd3643SJeff Mahoney if (!journal_join(&th, sb, 1)) { 3514a9dd3643SJeff Mahoney reiserfs_prepare_for_journal(sb, 3515a9dd3643SJeff Mahoney SB_BUFFER_WITH_SB(sb), 3516bd4c625cSLinus Torvalds 1); 3517a9dd3643SJeff Mahoney journal_mark_dirty(&th, sb, 3518a9dd3643SJeff Mahoney SB_BUFFER_WITH_SB(sb)); 35191da177e4SLinus Torvalds 35201da177e4SLinus Torvalds /* we're only being called from kreiserfsd, it makes no sense to do 35211da177e4SLinus Torvalds ** an async commit so that kreiserfsd can do it later 35221da177e4SLinus Torvalds */ 3523a9dd3643SJeff Mahoney do_journal_end(&th, sb, 1, COMMIT_NOW | WAIT); 35241da177e4SLinus Torvalds } 35251da177e4SLinus Torvalds } 35261da177e4SLinus Torvalds } 35271da177e4SLinus Torvalds 35281da177e4SLinus Torvalds /* 35291da177e4SLinus Torvalds ** returns 0 if do_journal_end should return right away, returns 1 if do_journal_end should finish the commit 35301da177e4SLinus Torvalds ** 35311da177e4SLinus Torvalds ** if the current transaction is too old, but still has writers, this will wait on j_join_wait until all 35321da177e4SLinus Torvalds ** the writers are done. By the time it wakes up, the transaction it was called has already ended, so it just 35331da177e4SLinus Torvalds ** flushes the commit list and returns 0. 35341da177e4SLinus Torvalds ** 35351da177e4SLinus Torvalds ** Won't batch when flush or commit_now is set. Also won't batch when others are waiting on j_join_wait. 35361da177e4SLinus Torvalds ** 35371da177e4SLinus Torvalds ** Note, we can't allow the journal_end to proceed while there are still writers in the log. 35381da177e4SLinus Torvalds */ 3539bd4c625cSLinus Torvalds static int check_journal_end(struct reiserfs_transaction_handle *th, 3540a9dd3643SJeff Mahoney struct super_block *sb, unsigned long nblocks, 3541bd4c625cSLinus Torvalds int flags) 3542bd4c625cSLinus Torvalds { 35431da177e4SLinus Torvalds 35441da177e4SLinus Torvalds time_t now; 35451da177e4SLinus Torvalds int flush = flags & FLUSH_ALL; 35461da177e4SLinus Torvalds int commit_now = flags & COMMIT_NOW; 35471da177e4SLinus Torvalds int wait_on_commit = flags & WAIT; 35481da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 3549a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 35501da177e4SLinus Torvalds 35511da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 35521da177e4SLinus Torvalds 35531da177e4SLinus Torvalds if (th->t_trans_id != journal->j_trans_id) { 3554c3a9c210SJeff Mahoney reiserfs_panic(th->t_super, "journal-1577", 3555c3a9c210SJeff Mahoney "handle trans id %ld != current trans id %ld", 35561da177e4SLinus Torvalds th->t_trans_id, journal->j_trans_id); 35571da177e4SLinus Torvalds } 35581da177e4SLinus Torvalds 35591da177e4SLinus Torvalds journal->j_len_alloc -= (th->t_blocks_allocated - th->t_blocks_logged); 35601da177e4SLinus Torvalds if (atomic_read(&(journal->j_wcount)) > 0) { /* <= 0 is allowed. unmounting might not call begin */ 35611da177e4SLinus Torvalds atomic_dec(&(journal->j_wcount)); 35621da177e4SLinus Torvalds } 35631da177e4SLinus Torvalds 35641da177e4SLinus Torvalds /* BUG, deal with case where j_len is 0, but people previously freed blocks need to be released 35651da177e4SLinus Torvalds ** will be dealt with by next transaction that actually writes something, but should be taken 35661da177e4SLinus Torvalds ** care of in this trans 35671da177e4SLinus Torvalds */ 356814a61442SEric Sesterhenn BUG_ON(journal->j_len == 0); 356914a61442SEric Sesterhenn 35701da177e4SLinus Torvalds /* if wcount > 0, and we are called to with flush or commit_now, 35711da177e4SLinus Torvalds ** we wait on j_join_wait. We will wake up when the last writer has 35721da177e4SLinus Torvalds ** finished the transaction, and started it on its way to the disk. 35731da177e4SLinus Torvalds ** Then, we flush the commit or journal list, and just return 0 35741da177e4SLinus Torvalds ** because the rest of journal end was already done for this transaction. 35751da177e4SLinus Torvalds */ 35761da177e4SLinus Torvalds if (atomic_read(&(journal->j_wcount)) > 0) { 35771da177e4SLinus Torvalds if (flush || commit_now) { 35781da177e4SLinus Torvalds unsigned trans_id; 35791da177e4SLinus Torvalds 35801da177e4SLinus Torvalds jl = journal->j_current_jl; 35811da177e4SLinus Torvalds trans_id = jl->j_trans_id; 35821da177e4SLinus Torvalds if (wait_on_commit) 35831da177e4SLinus Torvalds jl->j_state |= LIST_COMMIT_PENDING; 35841da177e4SLinus Torvalds atomic_set(&(journal->j_jlock), 1); 35851da177e4SLinus Torvalds if (flush) { 35861da177e4SLinus Torvalds journal->j_next_full_flush = 1; 35871da177e4SLinus Torvalds } 3588a9dd3643SJeff Mahoney unlock_journal(sb); 35891da177e4SLinus Torvalds 35901da177e4SLinus Torvalds /* sleep while the current transaction is still j_jlocked */ 35911da177e4SLinus Torvalds while (journal->j_trans_id == trans_id) { 35921da177e4SLinus Torvalds if (atomic_read(&journal->j_jlock)) { 3593a9dd3643SJeff Mahoney queue_log_writer(sb); 35941da177e4SLinus Torvalds } else { 3595a9dd3643SJeff Mahoney lock_journal(sb); 35961da177e4SLinus Torvalds if (journal->j_trans_id == trans_id) { 3597bd4c625cSLinus Torvalds atomic_set(&(journal->j_jlock), 3598bd4c625cSLinus Torvalds 1); 35991da177e4SLinus Torvalds } 3600a9dd3643SJeff Mahoney unlock_journal(sb); 36011da177e4SLinus Torvalds } 36021da177e4SLinus Torvalds } 360314a61442SEric Sesterhenn BUG_ON(journal->j_trans_id == trans_id); 360414a61442SEric Sesterhenn 3605bd4c625cSLinus Torvalds if (commit_now 3606a9dd3643SJeff Mahoney && journal_list_still_alive(sb, trans_id) 3607bd4c625cSLinus Torvalds && wait_on_commit) { 3608a9dd3643SJeff Mahoney flush_commit_list(sb, jl, 1); 36091da177e4SLinus Torvalds } 36101da177e4SLinus Torvalds return 0; 36111da177e4SLinus Torvalds } 3612a9dd3643SJeff Mahoney unlock_journal(sb); 36131da177e4SLinus Torvalds return 0; 36141da177e4SLinus Torvalds } 36151da177e4SLinus Torvalds 36161da177e4SLinus Torvalds /* deal with old transactions where we are the last writers */ 36171da177e4SLinus Torvalds now = get_seconds(); 36181da177e4SLinus Torvalds if ((now - journal->j_trans_start_time) > journal->j_max_trans_age) { 36191da177e4SLinus Torvalds commit_now = 1; 36201da177e4SLinus Torvalds journal->j_next_async_flush = 1; 36211da177e4SLinus Torvalds } 36221da177e4SLinus Torvalds /* don't batch when someone is waiting on j_join_wait */ 36231da177e4SLinus Torvalds /* don't batch when syncing the commit or flushing the whole trans */ 3624bd4c625cSLinus Torvalds if (!(journal->j_must_wait > 0) && !(atomic_read(&(journal->j_jlock))) 3625bd4c625cSLinus Torvalds && !flush && !commit_now && (journal->j_len < journal->j_max_batch) 3626bd4c625cSLinus Torvalds && journal->j_len_alloc < journal->j_max_batch 3627bd4c625cSLinus Torvalds && journal->j_cnode_free > (journal->j_trans_max * 3)) { 36281da177e4SLinus Torvalds journal->j_bcount++; 3629a9dd3643SJeff Mahoney unlock_journal(sb); 36301da177e4SLinus Torvalds return 0; 36311da177e4SLinus Torvalds } 36321da177e4SLinus Torvalds 3633a9dd3643SJeff Mahoney if (journal->j_start > SB_ONDISK_JOURNAL_SIZE(sb)) { 3634a9dd3643SJeff Mahoney reiserfs_panic(sb, "journal-003", 3635c3a9c210SJeff Mahoney "j_start (%ld) is too high", 3636bd4c625cSLinus Torvalds journal->j_start); 36371da177e4SLinus Torvalds } 36381da177e4SLinus Torvalds return 1; 36391da177e4SLinus Torvalds } 36401da177e4SLinus Torvalds 36411da177e4SLinus Torvalds /* 36421da177e4SLinus Torvalds ** Does all the work that makes deleting blocks safe. 36431da177e4SLinus Torvalds ** when deleting a block mark BH_JNew, just remove it from the current transaction, clean it's buffer_head and move on. 36441da177e4SLinus Torvalds ** 36451da177e4SLinus Torvalds ** otherwise: 36461da177e4SLinus Torvalds ** set a bit for the block in the journal bitmap. That will prevent it from being allocated for unformatted nodes 36471da177e4SLinus Torvalds ** before this transaction has finished. 36481da177e4SLinus Torvalds ** 36491da177e4SLinus Torvalds ** mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers. That will prevent any old transactions with 36501da177e4SLinus Torvalds ** this block from trying to flush to the real location. Since we aren't removing the cnode from the journal_list_hash, 36511da177e4SLinus Torvalds ** the block can't be reallocated yet. 36521da177e4SLinus Torvalds ** 36531da177e4SLinus Torvalds ** Then remove it from the current transaction, decrementing any counters and filing it on the clean list. 36541da177e4SLinus Torvalds */ 3655bd4c625cSLinus Torvalds int journal_mark_freed(struct reiserfs_transaction_handle *th, 3656a9dd3643SJeff Mahoney struct super_block *sb, b_blocknr_t blocknr) 3657bd4c625cSLinus Torvalds { 3658a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 36591da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn = NULL; 36601da177e4SLinus Torvalds struct buffer_head *bh = NULL; 36611da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb = NULL; 36621da177e4SLinus Torvalds int cleaned = 0; 36631da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 36641da177e4SLinus Torvalds 3665a9dd3643SJeff Mahoney cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr); 36661da177e4SLinus Torvalds if (cn && cn->bh) { 36671da177e4SLinus Torvalds bh = cn->bh; 36681da177e4SLinus Torvalds get_bh(bh); 36691da177e4SLinus Torvalds } 36701da177e4SLinus Torvalds /* if it is journal new, we just remove it from this transaction */ 36711da177e4SLinus Torvalds if (bh && buffer_journal_new(bh)) { 36721da177e4SLinus Torvalds clear_buffer_journal_new(bh); 36731da177e4SLinus Torvalds clear_prepared_bits(bh); 36741da177e4SLinus Torvalds reiserfs_clean_and_file_buffer(bh); 3675a9dd3643SJeff Mahoney cleaned = remove_from_transaction(sb, blocknr, cleaned); 36761da177e4SLinus Torvalds } else { 36771da177e4SLinus Torvalds /* set the bit for this block in the journal bitmap for this transaction */ 36781da177e4SLinus Torvalds jb = journal->j_current_jl->j_list_bitmap; 36791da177e4SLinus Torvalds if (!jb) { 3680a9dd3643SJeff Mahoney reiserfs_panic(sb, "journal-1702", 3681c3a9c210SJeff Mahoney "journal_list_bitmap is NULL"); 36821da177e4SLinus Torvalds } 3683a9dd3643SJeff Mahoney set_bit_in_list_bitmap(sb, blocknr, jb); 36841da177e4SLinus Torvalds 36851da177e4SLinus Torvalds /* Note, the entire while loop is not allowed to schedule. */ 36861da177e4SLinus Torvalds 36871da177e4SLinus Torvalds if (bh) { 36881da177e4SLinus Torvalds clear_prepared_bits(bh); 36891da177e4SLinus Torvalds reiserfs_clean_and_file_buffer(bh); 36901da177e4SLinus Torvalds } 3691a9dd3643SJeff Mahoney cleaned = remove_from_transaction(sb, blocknr, cleaned); 36921da177e4SLinus Torvalds 36931da177e4SLinus Torvalds /* find all older transactions with this block, make sure they don't try to write it out */ 3694a9dd3643SJeff Mahoney cn = get_journal_hash_dev(sb, journal->j_list_hash_table, 3695bd4c625cSLinus Torvalds blocknr); 36961da177e4SLinus Torvalds while (cn) { 3697a9dd3643SJeff Mahoney if (sb == cn->sb && blocknr == cn->blocknr) { 36981da177e4SLinus Torvalds set_bit(BLOCK_FREED, &cn->state); 36991da177e4SLinus Torvalds if (cn->bh) { 37001da177e4SLinus Torvalds if (!cleaned) { 37011da177e4SLinus Torvalds /* remove_from_transaction will brelse the buffer if it was 37021da177e4SLinus Torvalds ** in the current trans 37031da177e4SLinus Torvalds */ 3704bd4c625cSLinus Torvalds clear_buffer_journal_dirty(cn-> 3705bd4c625cSLinus Torvalds bh); 37061da177e4SLinus Torvalds clear_buffer_dirty(cn->bh); 3707bd4c625cSLinus Torvalds clear_buffer_journal_test(cn-> 3708bd4c625cSLinus Torvalds bh); 37091da177e4SLinus Torvalds cleaned = 1; 37101da177e4SLinus Torvalds put_bh(cn->bh); 3711bd4c625cSLinus Torvalds if (atomic_read 3712bd4c625cSLinus Torvalds (&(cn->bh->b_count)) < 0) { 3713a9dd3643SJeff Mahoney reiserfs_warning(sb, 371445b03d5eSJeff Mahoney "journal-2138", 371545b03d5eSJeff Mahoney "cn->bh->b_count < 0"); 37161da177e4SLinus Torvalds } 37171da177e4SLinus Torvalds } 37181da177e4SLinus Torvalds if (cn->jlist) { /* since we are clearing the bh, we MUST dec nonzerolen */ 3719bd4c625cSLinus Torvalds atomic_dec(& 3720bd4c625cSLinus Torvalds (cn->jlist-> 3721bd4c625cSLinus Torvalds j_nonzerolen)); 37221da177e4SLinus Torvalds } 37231da177e4SLinus Torvalds cn->bh = NULL; 37241da177e4SLinus Torvalds } 37251da177e4SLinus Torvalds } 37261da177e4SLinus Torvalds cn = cn->hnext; 37271da177e4SLinus Torvalds } 37281da177e4SLinus Torvalds } 37291da177e4SLinus Torvalds 3730398c95bdSChris Mason if (bh) 3731398c95bdSChris Mason release_buffer_page(bh); /* get_hash grabs the buffer */ 37321da177e4SLinus Torvalds return 0; 37331da177e4SLinus Torvalds } 37341da177e4SLinus Torvalds 3735bd4c625cSLinus Torvalds void reiserfs_update_inode_transaction(struct inode *inode) 3736bd4c625cSLinus Torvalds { 37371da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(inode->i_sb); 37381da177e4SLinus Torvalds REISERFS_I(inode)->i_jl = journal->j_current_jl; 37391da177e4SLinus Torvalds REISERFS_I(inode)->i_trans_id = journal->j_trans_id; 37401da177e4SLinus Torvalds } 37411da177e4SLinus Torvalds 37421da177e4SLinus Torvalds /* 37431da177e4SLinus Torvalds * returns -1 on error, 0 if no commits/barriers were done and 1 37441da177e4SLinus Torvalds * if a transaction was actually committed and the barrier was done 37451da177e4SLinus Torvalds */ 37461da177e4SLinus Torvalds static int __commit_trans_jl(struct inode *inode, unsigned long id, 37471da177e4SLinus Torvalds struct reiserfs_journal_list *jl) 37481da177e4SLinus Torvalds { 37491da177e4SLinus Torvalds struct reiserfs_transaction_handle th; 37501da177e4SLinus Torvalds struct super_block *sb = inode->i_sb; 37511da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(sb); 37521da177e4SLinus Torvalds int ret = 0; 37531da177e4SLinus Torvalds 37541da177e4SLinus Torvalds /* is it from the current transaction, or from an unknown transaction? */ 37551da177e4SLinus Torvalds if (id == journal->j_trans_id) { 37561da177e4SLinus Torvalds jl = journal->j_current_jl; 37571da177e4SLinus Torvalds /* try to let other writers come in and grow this transaction */ 37581da177e4SLinus Torvalds let_transaction_grow(sb, id); 37591da177e4SLinus Torvalds if (journal->j_trans_id != id) { 37601da177e4SLinus Torvalds goto flush_commit_only; 37611da177e4SLinus Torvalds } 37621da177e4SLinus Torvalds 37631da177e4SLinus Torvalds ret = journal_begin(&th, sb, 1); 37641da177e4SLinus Torvalds if (ret) 37651da177e4SLinus Torvalds return ret; 37661da177e4SLinus Torvalds 37671da177e4SLinus Torvalds /* someone might have ended this transaction while we joined */ 37681da177e4SLinus Torvalds if (journal->j_trans_id != id) { 3769bd4c625cSLinus Torvalds reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), 3770bd4c625cSLinus Torvalds 1); 37711da177e4SLinus Torvalds journal_mark_dirty(&th, sb, SB_BUFFER_WITH_SB(sb)); 37721da177e4SLinus Torvalds ret = journal_end(&th, sb, 1); 37731da177e4SLinus Torvalds goto flush_commit_only; 37741da177e4SLinus Torvalds } 37751da177e4SLinus Torvalds 37761da177e4SLinus Torvalds ret = journal_end_sync(&th, sb, 1); 37771da177e4SLinus Torvalds if (!ret) 37781da177e4SLinus Torvalds ret = 1; 37791da177e4SLinus Torvalds 37801da177e4SLinus Torvalds } else { 37811da177e4SLinus Torvalds /* this gets tricky, we have to make sure the journal list in 37821da177e4SLinus Torvalds * the inode still exists. We know the list is still around 37831da177e4SLinus Torvalds * if we've got a larger transaction id than the oldest list 37841da177e4SLinus Torvalds */ 37851da177e4SLinus Torvalds flush_commit_only: 37861da177e4SLinus Torvalds if (journal_list_still_alive(inode->i_sb, id)) { 37871da177e4SLinus Torvalds /* 37881da177e4SLinus Torvalds * we only set ret to 1 when we know for sure 37891da177e4SLinus Torvalds * the barrier hasn't been started yet on the commit 37901da177e4SLinus Torvalds * block. 37911da177e4SLinus Torvalds */ 37921da177e4SLinus Torvalds if (atomic_read(&jl->j_commit_left) > 1) 37931da177e4SLinus Torvalds ret = 1; 37941da177e4SLinus Torvalds flush_commit_list(sb, jl, 1); 37951da177e4SLinus Torvalds if (journal->j_errno) 37961da177e4SLinus Torvalds ret = journal->j_errno; 37971da177e4SLinus Torvalds } 37981da177e4SLinus Torvalds } 37991da177e4SLinus Torvalds /* otherwise the list is gone, and long since committed */ 38001da177e4SLinus Torvalds return ret; 38011da177e4SLinus Torvalds } 38021da177e4SLinus Torvalds 3803bd4c625cSLinus Torvalds int reiserfs_commit_for_inode(struct inode *inode) 3804bd4c625cSLinus Torvalds { 3805600ed416SJeff Mahoney unsigned int id = REISERFS_I(inode)->i_trans_id; 38061da177e4SLinus Torvalds struct reiserfs_journal_list *jl = REISERFS_I(inode)->i_jl; 38071da177e4SLinus Torvalds 38081da177e4SLinus Torvalds /* for the whole inode, assume unset id means it was 38091da177e4SLinus Torvalds * changed in the current transaction. More conservative 38101da177e4SLinus Torvalds */ 38111da177e4SLinus Torvalds if (!id || !jl) { 38121da177e4SLinus Torvalds reiserfs_update_inode_transaction(inode); 38131da177e4SLinus Torvalds id = REISERFS_I(inode)->i_trans_id; 38141da177e4SLinus Torvalds /* jl will be updated in __commit_trans_jl */ 38151da177e4SLinus Torvalds } 38161da177e4SLinus Torvalds 38171da177e4SLinus Torvalds return __commit_trans_jl(inode, id, jl); 38181da177e4SLinus Torvalds } 38191da177e4SLinus Torvalds 3820a9dd3643SJeff Mahoney void reiserfs_restore_prepared_buffer(struct super_block *sb, 3821bd4c625cSLinus Torvalds struct buffer_head *bh) 3822bd4c625cSLinus Torvalds { 3823a9dd3643SJeff Mahoney struct reiserfs_journal *journal = SB_JOURNAL(sb); 3824a9dd3643SJeff Mahoney PROC_INFO_INC(sb, journal.restore_prepared); 38251da177e4SLinus Torvalds if (!bh) { 38261da177e4SLinus Torvalds return; 38271da177e4SLinus Torvalds } 38281da177e4SLinus Torvalds if (test_clear_buffer_journal_restore_dirty(bh) && 38291da177e4SLinus Torvalds buffer_journal_dirty(bh)) { 38301da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 3831278f6679SJeff Mahoney reiserfs_write_lock(sb); 3832a9dd3643SJeff Mahoney cn = get_journal_hash_dev(sb, 38331da177e4SLinus Torvalds journal->j_list_hash_table, 38341da177e4SLinus Torvalds bh->b_blocknr); 38351da177e4SLinus Torvalds if (cn && can_dirty(cn)) { 38361da177e4SLinus Torvalds set_buffer_journal_test(bh); 38371da177e4SLinus Torvalds mark_buffer_dirty(bh); 38381da177e4SLinus Torvalds } 3839278f6679SJeff Mahoney reiserfs_write_unlock(sb); 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; 3923278f6679SJeff Mahoney int depth; 39241da177e4SLinus Torvalds 39251da177e4SLinus Torvalds BUG_ON(th->t_refcount > 1); 39261da177e4SLinus Torvalds BUG_ON(!th->t_trans_id); 39271da177e4SLinus Torvalds 3928a44c94a7SAlexander Zarochentsev /* protect flush_older_commits from doing mistakes if the 3929a44c94a7SAlexander Zarochentsev transaction ID counter gets overflowed. */ 3930600ed416SJeff Mahoney if (th->t_trans_id == ~0U) 3931a44c94a7SAlexander Zarochentsev flags |= FLUSH_ALL | COMMIT_NOW | WAIT; 3932a44c94a7SAlexander Zarochentsev flush = flags & FLUSH_ALL; 3933a44c94a7SAlexander Zarochentsev wait_on_commit = flags & WAIT; 3934a44c94a7SAlexander Zarochentsev 39351da177e4SLinus Torvalds current->journal_info = th->t_handle_save; 3936a9dd3643SJeff Mahoney reiserfs_check_lock_depth(sb, "journal end"); 39371da177e4SLinus Torvalds if (journal->j_len == 0) { 3938a9dd3643SJeff Mahoney reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), 3939bd4c625cSLinus Torvalds 1); 3940a9dd3643SJeff Mahoney journal_mark_dirty(th, sb, SB_BUFFER_WITH_SB(sb)); 39411da177e4SLinus Torvalds } 39421da177e4SLinus Torvalds 3943a9dd3643SJeff Mahoney lock_journal(sb); 39441da177e4SLinus Torvalds if (journal->j_next_full_flush) { 39451da177e4SLinus Torvalds flags |= FLUSH_ALL; 39461da177e4SLinus Torvalds flush = 1; 39471da177e4SLinus Torvalds } 39481da177e4SLinus Torvalds if (journal->j_next_async_flush) { 39491da177e4SLinus Torvalds flags |= COMMIT_NOW | WAIT; 39501da177e4SLinus Torvalds wait_on_commit = 1; 39511da177e4SLinus Torvalds } 39521da177e4SLinus Torvalds 39531da177e4SLinus Torvalds /* check_journal_end locks the journal, and unlocks if it does not return 1 39541da177e4SLinus Torvalds ** it tells us if we should continue with the journal_end, or just return 39551da177e4SLinus Torvalds */ 3956a9dd3643SJeff Mahoney if (!check_journal_end(th, sb, nblocks, flags)) { 3957033369d1SArtem Bityutskiy reiserfs_schedule_old_flush(sb); 3958a9dd3643SJeff Mahoney wake_queued_writers(sb); 3959a9dd3643SJeff Mahoney reiserfs_async_progress_wait(sb); 39601da177e4SLinus Torvalds goto out; 39611da177e4SLinus Torvalds } 39621da177e4SLinus Torvalds 39631da177e4SLinus Torvalds /* check_journal_end might set these, check again */ 39641da177e4SLinus Torvalds if (journal->j_next_full_flush) { 39651da177e4SLinus Torvalds flush = 1; 39661da177e4SLinus Torvalds } 39671da177e4SLinus Torvalds 39681da177e4SLinus Torvalds /* 39691da177e4SLinus Torvalds ** j must wait means we have to flush the log blocks, and the real blocks for 39701da177e4SLinus Torvalds ** this transaction 39711da177e4SLinus Torvalds */ 39721da177e4SLinus Torvalds if (journal->j_must_wait > 0) { 39731da177e4SLinus Torvalds flush = 1; 39741da177e4SLinus Torvalds } 39751da177e4SLinus Torvalds #ifdef REISERFS_PREALLOCATE 3976ef43bc4fSJan Kara /* quota ops might need to nest, setup the journal_info pointer for them 3977ef43bc4fSJan Kara * and raise the refcount so that it is > 0. */ 39781da177e4SLinus Torvalds current->journal_info = th; 3979ef43bc4fSJan Kara th->t_refcount++; 39801da177e4SLinus Torvalds reiserfs_discard_all_prealloc(th); /* it should not involve new blocks into 39811da177e4SLinus Torvalds * the transaction */ 3982ef43bc4fSJan Kara th->t_refcount--; 39831da177e4SLinus Torvalds current->journal_info = th->t_handle_save; 39841da177e4SLinus Torvalds #endif 39851da177e4SLinus Torvalds 39861da177e4SLinus Torvalds /* setup description block */ 3987bd4c625cSLinus Torvalds d_bh = 3988a9dd3643SJeff Mahoney journal_getblk(sb, 3989a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 3990bd4c625cSLinus Torvalds journal->j_start); 39911da177e4SLinus Torvalds set_buffer_uptodate(d_bh); 39921da177e4SLinus Torvalds desc = (struct reiserfs_journal_desc *)(d_bh)->b_data; 39931da177e4SLinus Torvalds memset(d_bh->b_data, 0, d_bh->b_size); 39941da177e4SLinus Torvalds memcpy(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8); 39951da177e4SLinus Torvalds set_desc_trans_id(desc, journal->j_trans_id); 39961da177e4SLinus Torvalds 39971da177e4SLinus Torvalds /* setup commit block. Don't write (keep it clean too) this one until after everyone else is written */ 3998a9dd3643SJeff Mahoney c_bh = journal_getblk(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 3999bd4c625cSLinus Torvalds ((journal->j_start + journal->j_len + 4000a9dd3643SJeff Mahoney 1) % SB_ONDISK_JOURNAL_SIZE(sb))); 40011da177e4SLinus Torvalds commit = (struct reiserfs_journal_commit *)c_bh->b_data; 40021da177e4SLinus Torvalds memset(c_bh->b_data, 0, c_bh->b_size); 40031da177e4SLinus Torvalds set_commit_trans_id(commit, journal->j_trans_id); 40041da177e4SLinus Torvalds set_buffer_uptodate(c_bh); 40051da177e4SLinus Torvalds 40061da177e4SLinus Torvalds /* init this journal list */ 40071da177e4SLinus Torvalds jl = journal->j_current_jl; 40081da177e4SLinus Torvalds 40091da177e4SLinus Torvalds /* we lock the commit before doing anything because 40101da177e4SLinus Torvalds * we want to make sure nobody tries to run flush_commit_list until 40111da177e4SLinus Torvalds * the new transaction is fully setup, and we've already flushed the 40121da177e4SLinus Torvalds * ordered bh list 40131da177e4SLinus Torvalds */ 40148ebc4232SFrederic Weisbecker reiserfs_mutex_lock_safe(&jl->j_commit_mutex, sb); 40151da177e4SLinus Torvalds 40161da177e4SLinus Torvalds /* save the transaction id in case we need to commit it later */ 40171da177e4SLinus Torvalds commit_trans_id = jl->j_trans_id; 40181da177e4SLinus Torvalds 40191da177e4SLinus Torvalds atomic_set(&jl->j_older_commits_done, 0); 40201da177e4SLinus Torvalds jl->j_trans_id = journal->j_trans_id; 40211da177e4SLinus Torvalds jl->j_timestamp = journal->j_trans_start_time; 40221da177e4SLinus Torvalds jl->j_commit_bh = c_bh; 40231da177e4SLinus Torvalds jl->j_start = journal->j_start; 40241da177e4SLinus Torvalds jl->j_len = journal->j_len; 40251da177e4SLinus Torvalds atomic_set(&jl->j_nonzerolen, journal->j_len); 40261da177e4SLinus Torvalds atomic_set(&jl->j_commit_left, journal->j_len + 2); 40271da177e4SLinus Torvalds jl->j_realblock = NULL; 40281da177e4SLinus Torvalds 40291da177e4SLinus Torvalds /* The ENTIRE FOR LOOP MUST not cause schedule to occur. 40301da177e4SLinus Torvalds ** for each real block, add it to the journal list hash, 40311da177e4SLinus Torvalds ** copy into real block index array in the commit or desc block 40321da177e4SLinus Torvalds */ 4033a9dd3643SJeff Mahoney trans_half = journal_trans_half(sb->s_blocksize); 40341da177e4SLinus Torvalds for (i = 0, cn = journal->j_first; cn; cn = cn->next, i++) { 40351da177e4SLinus Torvalds if (buffer_journaled(cn->bh)) { 4036a9dd3643SJeff Mahoney jl_cn = get_cnode(sb); 40371da177e4SLinus Torvalds if (!jl_cn) { 4038a9dd3643SJeff Mahoney reiserfs_panic(sb, "journal-1676", 4039c3a9c210SJeff Mahoney "get_cnode returned NULL"); 40401da177e4SLinus Torvalds } 40411da177e4SLinus Torvalds if (i == 0) { 40421da177e4SLinus Torvalds jl->j_realblock = jl_cn; 40431da177e4SLinus Torvalds } 40441da177e4SLinus Torvalds jl_cn->prev = last_cn; 40451da177e4SLinus Torvalds jl_cn->next = NULL; 40461da177e4SLinus Torvalds if (last_cn) { 40471da177e4SLinus Torvalds last_cn->next = jl_cn; 40481da177e4SLinus Torvalds } 40491da177e4SLinus Torvalds last_cn = jl_cn; 40501da177e4SLinus Torvalds /* make sure the block we are trying to log is not a block 40511da177e4SLinus Torvalds of journal or reserved area */ 40521da177e4SLinus Torvalds 4053bd4c625cSLinus Torvalds if (is_block_in_log_or_reserved_area 4054a9dd3643SJeff Mahoney (sb, cn->bh->b_blocknr)) { 4055a9dd3643SJeff Mahoney reiserfs_panic(sb, "journal-2332", 4056c3a9c210SJeff Mahoney "Trying to log block %lu, " 4057c3a9c210SJeff Mahoney "which is a log block", 4058bd4c625cSLinus Torvalds cn->bh->b_blocknr); 40591da177e4SLinus Torvalds } 40601da177e4SLinus Torvalds jl_cn->blocknr = cn->bh->b_blocknr; 40611da177e4SLinus Torvalds jl_cn->state = 0; 4062a9dd3643SJeff Mahoney jl_cn->sb = sb; 40631da177e4SLinus Torvalds jl_cn->bh = cn->bh; 40641da177e4SLinus Torvalds jl_cn->jlist = jl; 40651da177e4SLinus Torvalds insert_journal_hash(journal->j_list_hash_table, jl_cn); 40661da177e4SLinus Torvalds if (i < trans_half) { 4067bd4c625cSLinus Torvalds desc->j_realblock[i] = 4068bd4c625cSLinus Torvalds cpu_to_le32(cn->bh->b_blocknr); 40691da177e4SLinus Torvalds } else { 4070bd4c625cSLinus Torvalds commit->j_realblock[i - trans_half] = 4071bd4c625cSLinus Torvalds cpu_to_le32(cn->bh->b_blocknr); 40721da177e4SLinus Torvalds } 40731da177e4SLinus Torvalds } else { 40741da177e4SLinus Torvalds i--; 40751da177e4SLinus Torvalds } 40761da177e4SLinus Torvalds } 40771da177e4SLinus Torvalds set_desc_trans_len(desc, journal->j_len); 40781da177e4SLinus Torvalds set_desc_mount_id(desc, journal->j_mount_id); 40791da177e4SLinus Torvalds set_desc_trans_id(desc, journal->j_trans_id); 40801da177e4SLinus Torvalds set_commit_trans_len(commit, journal->j_len); 40811da177e4SLinus Torvalds 40821da177e4SLinus Torvalds /* special check in case all buffers in the journal were marked for not logging */ 408314a61442SEric Sesterhenn BUG_ON(journal->j_len == 0); 40841da177e4SLinus Torvalds 40851da177e4SLinus Torvalds /* we're about to dirty all the log blocks, mark the description block 40861da177e4SLinus Torvalds * dirty now too. Don't mark the commit block dirty until all the 40871da177e4SLinus Torvalds * others are on disk 40881da177e4SLinus Torvalds */ 40891da177e4SLinus Torvalds mark_buffer_dirty(d_bh); 40901da177e4SLinus Torvalds 40911da177e4SLinus Torvalds /* first data block is j_start + 1, so add one to cur_write_start wherever you use it */ 40921da177e4SLinus Torvalds cur_write_start = journal->j_start; 40931da177e4SLinus Torvalds cn = journal->j_first; 40941da177e4SLinus Torvalds jindex = 1; /* start at one so we don't get the desc again */ 40951da177e4SLinus Torvalds while (cn) { 40961da177e4SLinus Torvalds clear_buffer_journal_new(cn->bh); 40971da177e4SLinus Torvalds /* copy all the real blocks into log area. dirty log blocks */ 40981da177e4SLinus Torvalds if (buffer_journaled(cn->bh)) { 40991da177e4SLinus Torvalds struct buffer_head *tmp_bh; 41001da177e4SLinus Torvalds char *addr; 41011da177e4SLinus Torvalds struct page *page; 4102bd4c625cSLinus Torvalds tmp_bh = 4103a9dd3643SJeff Mahoney journal_getblk(sb, 4104a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_1st_BLOCK(sb) + 4105bd4c625cSLinus Torvalds ((cur_write_start + 4106bd4c625cSLinus Torvalds jindex) % 4107a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb))); 41081da177e4SLinus Torvalds set_buffer_uptodate(tmp_bh); 41091da177e4SLinus Torvalds page = cn->bh->b_page; 41101da177e4SLinus Torvalds addr = kmap(page); 4111bd4c625cSLinus Torvalds memcpy(tmp_bh->b_data, 4112bd4c625cSLinus Torvalds addr + offset_in_page(cn->bh->b_data), 41131da177e4SLinus Torvalds cn->bh->b_size); 41141da177e4SLinus Torvalds kunmap(page); 41151da177e4SLinus Torvalds mark_buffer_dirty(tmp_bh); 41161da177e4SLinus Torvalds jindex++; 41171da177e4SLinus Torvalds set_buffer_journal_dirty(cn->bh); 41181da177e4SLinus Torvalds clear_buffer_journaled(cn->bh); 41191da177e4SLinus Torvalds } else { 41201da177e4SLinus Torvalds /* JDirty cleared sometime during transaction. don't log this one */ 4121a9dd3643SJeff Mahoney reiserfs_warning(sb, "journal-2048", 412245b03d5eSJeff Mahoney "BAD, buffer in journal hash, " 412345b03d5eSJeff Mahoney "but not JDirty!"); 41241da177e4SLinus Torvalds brelse(cn->bh); 41251da177e4SLinus Torvalds } 41261da177e4SLinus Torvalds next = cn->next; 4127a9dd3643SJeff Mahoney free_cnode(sb, cn); 41281da177e4SLinus Torvalds cn = next; 4129278f6679SJeff Mahoney reiserfs_cond_resched(sb); 41301da177e4SLinus Torvalds } 41311da177e4SLinus Torvalds 41321da177e4SLinus Torvalds /* we are done with both the c_bh and d_bh, but 41331da177e4SLinus Torvalds ** c_bh must be written after all other commit blocks, 41341da177e4SLinus Torvalds ** so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1. 41351da177e4SLinus Torvalds */ 41361da177e4SLinus Torvalds 4137a9dd3643SJeff Mahoney journal->j_current_jl = alloc_journal_list(sb); 41381da177e4SLinus Torvalds 41391da177e4SLinus Torvalds /* now it is safe to insert this transaction on the main list */ 41401da177e4SLinus Torvalds list_add_tail(&jl->j_list, &journal->j_journal_list); 41411da177e4SLinus Torvalds list_add_tail(&jl->j_working_list, &journal->j_working_list); 41421da177e4SLinus Torvalds journal->j_num_work_lists++; 41431da177e4SLinus Torvalds 41441da177e4SLinus Torvalds /* reset journal values for the next transaction */ 41451da177e4SLinus Torvalds old_start = journal->j_start; 4146bd4c625cSLinus Torvalds journal->j_start = 4147bd4c625cSLinus Torvalds (journal->j_start + journal->j_len + 4148a9dd3643SJeff Mahoney 2) % SB_ONDISK_JOURNAL_SIZE(sb); 41491da177e4SLinus Torvalds atomic_set(&(journal->j_wcount), 0); 41501da177e4SLinus Torvalds journal->j_bcount = 0; 41511da177e4SLinus Torvalds journal->j_last = NULL; 41521da177e4SLinus Torvalds journal->j_first = NULL; 41531da177e4SLinus Torvalds journal->j_len = 0; 41541da177e4SLinus Torvalds journal->j_trans_start_time = 0; 4155a44c94a7SAlexander Zarochentsev /* check for trans_id overflow */ 4156a44c94a7SAlexander Zarochentsev if (++journal->j_trans_id == 0) 4157a44c94a7SAlexander Zarochentsev journal->j_trans_id = 10; 41581da177e4SLinus Torvalds journal->j_current_jl->j_trans_id = journal->j_trans_id; 41591da177e4SLinus Torvalds journal->j_must_wait = 0; 41601da177e4SLinus Torvalds journal->j_len_alloc = 0; 41611da177e4SLinus Torvalds journal->j_next_full_flush = 0; 41621da177e4SLinus Torvalds journal->j_next_async_flush = 0; 4163a9dd3643SJeff Mahoney init_journal_hash(sb); 41641da177e4SLinus Torvalds 41651da177e4SLinus Torvalds // make sure reiserfs_add_jh sees the new current_jl before we 41661da177e4SLinus Torvalds // write out the tails 41671da177e4SLinus Torvalds smp_mb(); 41681da177e4SLinus Torvalds 41691da177e4SLinus Torvalds /* tail conversion targets have to hit the disk before we end the 41701da177e4SLinus Torvalds * transaction. Otherwise a later transaction might repack the tail 41711da177e4SLinus Torvalds * before this transaction commits, leaving the data block unflushed and 41721da177e4SLinus Torvalds * clean, if we crash before the later transaction commits, the data block 41731da177e4SLinus Torvalds * is lost. 41741da177e4SLinus Torvalds */ 41751da177e4SLinus Torvalds if (!list_empty(&jl->j_tail_bh_list)) { 4176278f6679SJeff Mahoney depth = reiserfs_write_unlock_nested(sb); 41771da177e4SLinus Torvalds write_ordered_buffers(&journal->j_dirty_buffers_lock, 41781da177e4SLinus Torvalds journal, jl, &jl->j_tail_bh_list); 4179278f6679SJeff Mahoney reiserfs_write_lock_nested(sb, depth); 41801da177e4SLinus Torvalds } 418114a61442SEric Sesterhenn BUG_ON(!list_empty(&jl->j_tail_bh_list)); 418290415deaSJeff Mahoney mutex_unlock(&jl->j_commit_mutex); 41831da177e4SLinus Torvalds 41841da177e4SLinus Torvalds /* honor the flush wishes from the caller, simple commits can 41851da177e4SLinus Torvalds ** be done outside the journal lock, they are done below 41861da177e4SLinus Torvalds ** 41871da177e4SLinus Torvalds ** if we don't flush the commit list right now, we put it into 41881da177e4SLinus Torvalds ** the work queue so the people waiting on the async progress work 41891da177e4SLinus Torvalds ** queue don't wait for this proc to flush journal lists and such. 41901da177e4SLinus Torvalds */ 41911da177e4SLinus Torvalds if (flush) { 4192a9dd3643SJeff Mahoney flush_commit_list(sb, jl, 1); 4193a9dd3643SJeff Mahoney flush_journal_list(sb, jl, 1); 41941da177e4SLinus Torvalds } else if (!(jl->j_state & LIST_COMMIT_PENDING)) 41951da177e4SLinus Torvalds queue_delayed_work(commit_wq, &journal->j_work, HZ / 10); 41961da177e4SLinus Torvalds 41971da177e4SLinus Torvalds /* if the next transaction has any chance of wrapping, flush 41981da177e4SLinus Torvalds ** transactions that might get overwritten. If any journal lists are very 41991da177e4SLinus Torvalds ** old flush them as well. 42001da177e4SLinus Torvalds */ 42011da177e4SLinus Torvalds first_jl: 42021da177e4SLinus Torvalds list_for_each_safe(entry, safe, &journal->j_journal_list) { 42031da177e4SLinus Torvalds temp_jl = JOURNAL_LIST_ENTRY(entry); 42041da177e4SLinus Torvalds if (journal->j_start <= temp_jl->j_start) { 42051da177e4SLinus Torvalds if ((journal->j_start + journal->j_trans_max + 1) >= 4206bd4c625cSLinus Torvalds temp_jl->j_start) { 4207a9dd3643SJeff Mahoney flush_used_journal_lists(sb, temp_jl); 42081da177e4SLinus Torvalds goto first_jl; 42091da177e4SLinus Torvalds } else if ((journal->j_start + 42101da177e4SLinus Torvalds journal->j_trans_max + 1) < 4211a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb)) { 42121da177e4SLinus Torvalds /* if we don't cross into the next transaction and we don't 42131da177e4SLinus Torvalds * wrap, there is no way we can overlap any later transactions 42141da177e4SLinus Torvalds * break now 42151da177e4SLinus Torvalds */ 42161da177e4SLinus Torvalds break; 42171da177e4SLinus Torvalds } 42181da177e4SLinus Torvalds } else if ((journal->j_start + 42191da177e4SLinus Torvalds journal->j_trans_max + 1) > 4220a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb)) { 42211da177e4SLinus Torvalds if (((journal->j_start + journal->j_trans_max + 1) % 4222a9dd3643SJeff Mahoney SB_ONDISK_JOURNAL_SIZE(sb)) >= 4223bd4c625cSLinus Torvalds temp_jl->j_start) { 4224a9dd3643SJeff Mahoney flush_used_journal_lists(sb, temp_jl); 42251da177e4SLinus Torvalds goto first_jl; 42261da177e4SLinus Torvalds } else { 42271da177e4SLinus Torvalds /* we don't overlap anything from out start to the end of the 42281da177e4SLinus Torvalds * log, and our wrapped portion doesn't overlap anything at 42291da177e4SLinus Torvalds * the start of the log. We can break 42301da177e4SLinus Torvalds */ 42311da177e4SLinus Torvalds break; 42321da177e4SLinus Torvalds } 42331da177e4SLinus Torvalds } 42341da177e4SLinus Torvalds } 4235a9dd3643SJeff Mahoney flush_old_journal_lists(sb); 42361da177e4SLinus Torvalds 4237bd4c625cSLinus Torvalds journal->j_current_jl->j_list_bitmap = 4238a9dd3643SJeff Mahoney get_list_bitmap(sb, journal->j_current_jl); 42391da177e4SLinus Torvalds 42401da177e4SLinus Torvalds if (!(journal->j_current_jl->j_list_bitmap)) { 4241a9dd3643SJeff Mahoney reiserfs_panic(sb, "journal-1996", 4242c3a9c210SJeff Mahoney "could not get a list bitmap"); 42431da177e4SLinus Torvalds } 42441da177e4SLinus Torvalds 42451da177e4SLinus Torvalds atomic_set(&(journal->j_jlock), 0); 4246a9dd3643SJeff Mahoney unlock_journal(sb); 42471da177e4SLinus Torvalds /* wake up any body waiting to join. */ 42481da177e4SLinus Torvalds clear_bit(J_WRITERS_QUEUED, &journal->j_state); 42491da177e4SLinus Torvalds wake_up(&(journal->j_join_wait)); 42501da177e4SLinus Torvalds 42511da177e4SLinus Torvalds if (!flush && wait_on_commit && 4252a9dd3643SJeff Mahoney journal_list_still_alive(sb, commit_trans_id)) { 4253a9dd3643SJeff Mahoney flush_commit_list(sb, jl, 1); 42541da177e4SLinus Torvalds } 42551da177e4SLinus Torvalds out: 4256a9dd3643SJeff Mahoney reiserfs_check_lock_depth(sb, "journal end2"); 42571da177e4SLinus Torvalds 42581da177e4SLinus Torvalds memset(th, 0, sizeof(*th)); 42591da177e4SLinus Torvalds /* Re-set th->t_super, so we can properly keep track of how many 42601da177e4SLinus Torvalds * persistent transactions there are. We need to do this so if this 42611da177e4SLinus Torvalds * call is part of a failed restart_transaction, we can free it later */ 4262a9dd3643SJeff Mahoney th->t_super = sb; 42631da177e4SLinus Torvalds 42641da177e4SLinus Torvalds return journal->j_errno; 42651da177e4SLinus Torvalds } 42661da177e4SLinus Torvalds 426732e8b106SJeff Mahoney /* Send the file system read only and refuse new transactions */ 426832e8b106SJeff Mahoney void reiserfs_abort_journal(struct super_block *sb, int errno) 42691da177e4SLinus Torvalds { 42701da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(sb); 42711da177e4SLinus Torvalds if (test_bit(J_ABORTED, &journal->j_state)) 42721da177e4SLinus Torvalds return; 42731da177e4SLinus Torvalds 427432e8b106SJeff Mahoney if (!journal->j_errno) 427532e8b106SJeff Mahoney journal->j_errno = errno; 42761da177e4SLinus Torvalds 42771da177e4SLinus Torvalds sb->s_flags |= MS_RDONLY; 42781da177e4SLinus Torvalds set_bit(J_ABORTED, &journal->j_state); 42791da177e4SLinus Torvalds 42801da177e4SLinus Torvalds #ifdef CONFIG_REISERFS_CHECK 42811da177e4SLinus Torvalds dump_stack(); 42821da177e4SLinus Torvalds #endif 42831da177e4SLinus Torvalds } 4284