11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds ** Write ahead logging implementation copyright Chris Mason 2000 31da177e4SLinus Torvalds ** 41da177e4SLinus Torvalds ** The background commits make this code very interelated, 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/config.h> 381da177e4SLinus Torvalds #include <asm/uaccess.h> 391da177e4SLinus Torvalds #include <asm/system.h> 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds #include <linux/time.h> 421da177e4SLinus Torvalds #include <asm/semaphore.h> 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds #include <linux/vmalloc.h> 451da177e4SLinus Torvalds #include <linux/reiserfs_fs.h> 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds #include <linux/kernel.h> 481da177e4SLinus Torvalds #include <linux/errno.h> 491da177e4SLinus Torvalds #include <linux/fcntl.h> 501da177e4SLinus Torvalds #include <linux/stat.h> 511da177e4SLinus Torvalds #include <linux/string.h> 521da177e4SLinus Torvalds #include <linux/smp_lock.h> 531da177e4SLinus Torvalds #include <linux/buffer_head.h> 541da177e4SLinus Torvalds #include <linux/workqueue.h> 551da177e4SLinus Torvalds #include <linux/writeback.h> 561da177e4SLinus Torvalds #include <linux/blkdev.h> 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds /* gets a struct reiserfs_journal_list * from a list head */ 601da177e4SLinus Torvalds #define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \ 611da177e4SLinus Torvalds j_list)) 621da177e4SLinus Torvalds #define JOURNAL_WORK_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \ 631da177e4SLinus Torvalds j_working_list)) 641da177e4SLinus Torvalds 651da177e4SLinus Torvalds /* the number of mounted filesystems. This is used to decide when to 661da177e4SLinus Torvalds ** start and kill the commit workqueue 671da177e4SLinus Torvalds */ 681da177e4SLinus Torvalds static int reiserfs_mounted_fs_count; 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds static struct workqueue_struct *commit_wq; 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds #define JOURNAL_TRANS_HALF 1018 /* must be correct to keep the desc and commit 731da177e4SLinus Torvalds structs at 4k */ 741da177e4SLinus Torvalds #define BUFNR 64 /*read ahead */ 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds /* cnode stat bits. Move these into reiserfs_fs.h */ 771da177e4SLinus Torvalds 781da177e4SLinus Torvalds #define BLOCK_FREED 2 /* this block was freed, and can't be written. */ 791da177e4SLinus Torvalds #define BLOCK_FREED_HOLDER 3 /* this block was freed during this transaction, and can't be written */ 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds #define BLOCK_NEEDS_FLUSH 4 /* used in flush_journal_list */ 821da177e4SLinus Torvalds #define BLOCK_DIRTIED 5 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds /* journal list state bits */ 861da177e4SLinus Torvalds #define LIST_TOUCHED 1 871da177e4SLinus Torvalds #define LIST_DIRTY 2 881da177e4SLinus Torvalds #define LIST_COMMIT_PENDING 4 /* someone will commit this list */ 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds /* flags for do_journal_end */ 911da177e4SLinus Torvalds #define FLUSH_ALL 1 /* flush commit and real blocks */ 921da177e4SLinus Torvalds #define COMMIT_NOW 2 /* end and commit this transaction */ 931da177e4SLinus Torvalds #define WAIT 4 /* wait for the log blocks to hit the disk*/ 941da177e4SLinus Torvalds 951da177e4SLinus Torvalds static int do_journal_end(struct reiserfs_transaction_handle *,struct super_block *,unsigned long nblocks,int flags) ; 961da177e4SLinus Torvalds static int flush_journal_list(struct super_block *s, struct reiserfs_journal_list *jl, int flushall) ; 971da177e4SLinus Torvalds static int flush_commit_list(struct super_block *s, struct reiserfs_journal_list *jl, int flushall) ; 981da177e4SLinus Torvalds static int can_dirty(struct reiserfs_journal_cnode *cn) ; 991da177e4SLinus Torvalds static int journal_join(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, unsigned long nblocks); 1001da177e4SLinus Torvalds static int release_journal_dev( struct super_block *super, 1011da177e4SLinus Torvalds struct reiserfs_journal *journal ); 1021da177e4SLinus Torvalds static int dirty_one_transaction(struct super_block *s, 1031da177e4SLinus Torvalds struct reiserfs_journal_list *jl); 1041da177e4SLinus Torvalds static void flush_async_commits(void *p); 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, 1151da177e4SLinus Torvalds struct super_block * p_s_sb, 1161da177e4SLinus Torvalds unsigned long nblocks,int join); 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds static void init_journal_hash(struct super_block *p_s_sb) { 1191da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 1201da177e4SLinus Torvalds memset(journal->j_hash_table, 0, JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)) ; 1211da177e4SLinus Torvalds } 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds /* 1241da177e4SLinus Torvalds ** clears BH_Dirty and sticks the buffer on the clean list. Called because I can't allow refile_buffer to 1251da177e4SLinus Torvalds ** make schedule happen after I've freed a block. Look at remove_from_transaction and journal_mark_freed for 1261da177e4SLinus Torvalds ** more details. 1271da177e4SLinus Torvalds */ 1281da177e4SLinus Torvalds static int reiserfs_clean_and_file_buffer(struct buffer_head *bh) { 1291da177e4SLinus Torvalds if (bh) { 1301da177e4SLinus Torvalds clear_buffer_dirty(bh); 1311da177e4SLinus Torvalds clear_buffer_journal_test(bh); 1321da177e4SLinus Torvalds } 1331da177e4SLinus Torvalds return 0 ; 1341da177e4SLinus Torvalds } 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds static void disable_barrier(struct super_block *s) 1371da177e4SLinus Torvalds { 1381da177e4SLinus Torvalds REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_BARRIER_FLUSH); 1391da177e4SLinus Torvalds printk("reiserfs: disabling flush barriers on %s\n", reiserfs_bdevname(s)); 1401da177e4SLinus Torvalds } 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds static struct reiserfs_bitmap_node * 1431da177e4SLinus Torvalds allocate_bitmap_node(struct super_block *p_s_sb) { 1441da177e4SLinus Torvalds struct reiserfs_bitmap_node *bn ; 1451da177e4SLinus Torvalds static int id; 1461da177e4SLinus Torvalds 1471da177e4SLinus Torvalds bn = reiserfs_kmalloc(sizeof(struct reiserfs_bitmap_node), GFP_NOFS, p_s_sb) ; 1481da177e4SLinus Torvalds if (!bn) { 1491da177e4SLinus Torvalds return NULL ; 1501da177e4SLinus Torvalds } 1511da177e4SLinus Torvalds bn->data = reiserfs_kmalloc(p_s_sb->s_blocksize, GFP_NOFS, p_s_sb) ; 1521da177e4SLinus Torvalds if (!bn->data) { 1531da177e4SLinus Torvalds reiserfs_kfree(bn, sizeof(struct reiserfs_bitmap_node), p_s_sb) ; 1541da177e4SLinus Torvalds return NULL ; 1551da177e4SLinus Torvalds } 1561da177e4SLinus Torvalds bn->id = id++ ; 1571da177e4SLinus Torvalds memset(bn->data, 0, p_s_sb->s_blocksize) ; 1581da177e4SLinus Torvalds INIT_LIST_HEAD(&bn->list) ; 1591da177e4SLinus Torvalds return bn ; 1601da177e4SLinus Torvalds } 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvalds static struct reiserfs_bitmap_node * 1631da177e4SLinus Torvalds get_bitmap_node(struct super_block *p_s_sb) { 1641da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 1651da177e4SLinus Torvalds struct reiserfs_bitmap_node *bn = NULL; 1661da177e4SLinus Torvalds struct list_head *entry = journal->j_bitmap_nodes.next ; 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds journal->j_used_bitmap_nodes++ ; 1691da177e4SLinus Torvalds repeat: 1701da177e4SLinus Torvalds 1711da177e4SLinus Torvalds if(entry != &journal->j_bitmap_nodes) { 1721da177e4SLinus Torvalds bn = list_entry(entry, struct reiserfs_bitmap_node, list) ; 1731da177e4SLinus Torvalds list_del(entry) ; 1741da177e4SLinus Torvalds memset(bn->data, 0, p_s_sb->s_blocksize) ; 1751da177e4SLinus Torvalds journal->j_free_bitmap_nodes-- ; 1761da177e4SLinus Torvalds return bn ; 1771da177e4SLinus Torvalds } 1781da177e4SLinus Torvalds bn = allocate_bitmap_node(p_s_sb) ; 1791da177e4SLinus Torvalds if (!bn) { 1801da177e4SLinus Torvalds yield(); 1811da177e4SLinus Torvalds goto repeat ; 1821da177e4SLinus Torvalds } 1831da177e4SLinus Torvalds return bn ; 1841da177e4SLinus Torvalds } 1851da177e4SLinus Torvalds static inline void free_bitmap_node(struct super_block *p_s_sb, 1861da177e4SLinus Torvalds struct reiserfs_bitmap_node *bn) { 1871da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 1881da177e4SLinus Torvalds journal->j_used_bitmap_nodes-- ; 1891da177e4SLinus Torvalds if (journal->j_free_bitmap_nodes > REISERFS_MAX_BITMAP_NODES) { 1901da177e4SLinus Torvalds reiserfs_kfree(bn->data, p_s_sb->s_blocksize, p_s_sb) ; 1911da177e4SLinus Torvalds reiserfs_kfree(bn, sizeof(struct reiserfs_bitmap_node), p_s_sb) ; 1921da177e4SLinus Torvalds } else { 1931da177e4SLinus Torvalds list_add(&bn->list, &journal->j_bitmap_nodes) ; 1941da177e4SLinus Torvalds journal->j_free_bitmap_nodes++ ; 1951da177e4SLinus Torvalds } 1961da177e4SLinus Torvalds } 1971da177e4SLinus Torvalds 1981da177e4SLinus Torvalds static void allocate_bitmap_nodes(struct super_block *p_s_sb) { 1991da177e4SLinus Torvalds int i ; 2001da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 2011da177e4SLinus Torvalds struct reiserfs_bitmap_node *bn = NULL ; 2021da177e4SLinus Torvalds for (i = 0 ; i < REISERFS_MIN_BITMAP_NODES ; i++) { 2031da177e4SLinus Torvalds bn = allocate_bitmap_node(p_s_sb) ; 2041da177e4SLinus Torvalds if (bn) { 2051da177e4SLinus Torvalds list_add(&bn->list, &journal->j_bitmap_nodes) ; 2061da177e4SLinus Torvalds journal->j_free_bitmap_nodes++ ; 2071da177e4SLinus Torvalds } else { 2081da177e4SLinus Torvalds break ; // this is ok, we'll try again when more are needed 2091da177e4SLinus Torvalds } 2101da177e4SLinus Torvalds } 2111da177e4SLinus Torvalds } 2121da177e4SLinus Torvalds 2131da177e4SLinus Torvalds static int set_bit_in_list_bitmap(struct super_block *p_s_sb, int block, 2141da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb) { 2151da177e4SLinus Torvalds int bmap_nr = block / (p_s_sb->s_blocksize << 3) ; 2161da177e4SLinus Torvalds int bit_nr = block % (p_s_sb->s_blocksize << 3) ; 2171da177e4SLinus Torvalds 2181da177e4SLinus Torvalds if (!jb->bitmaps[bmap_nr]) { 2191da177e4SLinus Torvalds jb->bitmaps[bmap_nr] = get_bitmap_node(p_s_sb) ; 2201da177e4SLinus Torvalds } 2211da177e4SLinus Torvalds set_bit(bit_nr, (unsigned long *)jb->bitmaps[bmap_nr]->data) ; 2221da177e4SLinus Torvalds return 0 ; 2231da177e4SLinus Torvalds } 2241da177e4SLinus Torvalds 2251da177e4SLinus Torvalds static void cleanup_bitmap_list(struct super_block *p_s_sb, 2261da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb) { 2271da177e4SLinus Torvalds int i; 2281da177e4SLinus Torvalds if (jb->bitmaps == NULL) 2291da177e4SLinus Torvalds return; 2301da177e4SLinus Torvalds 2311da177e4SLinus Torvalds for (i = 0 ; i < SB_BMAP_NR(p_s_sb) ; i++) { 2321da177e4SLinus Torvalds if (jb->bitmaps[i]) { 2331da177e4SLinus Torvalds free_bitmap_node(p_s_sb, jb->bitmaps[i]) ; 2341da177e4SLinus Torvalds jb->bitmaps[i] = NULL ; 2351da177e4SLinus Torvalds } 2361da177e4SLinus Torvalds } 2371da177e4SLinus Torvalds } 2381da177e4SLinus Torvalds 2391da177e4SLinus Torvalds /* 2401da177e4SLinus Torvalds ** only call this on FS unmount. 2411da177e4SLinus Torvalds */ 2421da177e4SLinus Torvalds static int free_list_bitmaps(struct super_block *p_s_sb, 2431da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb_array) { 2441da177e4SLinus Torvalds int i ; 2451da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb ; 2461da177e4SLinus Torvalds for (i = 0 ; i < JOURNAL_NUM_BITMAPS ; i++) { 2471da177e4SLinus Torvalds jb = jb_array + i ; 2481da177e4SLinus Torvalds jb->journal_list = NULL ; 2491da177e4SLinus Torvalds cleanup_bitmap_list(p_s_sb, jb) ; 2501da177e4SLinus Torvalds vfree(jb->bitmaps) ; 2511da177e4SLinus Torvalds jb->bitmaps = NULL ; 2521da177e4SLinus Torvalds } 2531da177e4SLinus Torvalds return 0; 2541da177e4SLinus Torvalds } 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds static int free_bitmap_nodes(struct super_block *p_s_sb) { 2571da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 2581da177e4SLinus Torvalds struct list_head *next = journal->j_bitmap_nodes.next ; 2591da177e4SLinus Torvalds struct reiserfs_bitmap_node *bn ; 2601da177e4SLinus Torvalds 2611da177e4SLinus Torvalds while(next != &journal->j_bitmap_nodes) { 2621da177e4SLinus Torvalds bn = list_entry(next, struct reiserfs_bitmap_node, list) ; 2631da177e4SLinus Torvalds list_del(next) ; 2641da177e4SLinus Torvalds reiserfs_kfree(bn->data, p_s_sb->s_blocksize, p_s_sb) ; 2651da177e4SLinus Torvalds reiserfs_kfree(bn, sizeof(struct reiserfs_bitmap_node), p_s_sb) ; 2661da177e4SLinus Torvalds next = journal->j_bitmap_nodes.next ; 2671da177e4SLinus Torvalds journal->j_free_bitmap_nodes-- ; 2681da177e4SLinus Torvalds } 2691da177e4SLinus Torvalds 2701da177e4SLinus Torvalds return 0 ; 2711da177e4SLinus Torvalds } 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds /* 2741da177e4SLinus Torvalds ** get memory for JOURNAL_NUM_BITMAPS worth of bitmaps. 2751da177e4SLinus Torvalds ** jb_array is the array to be filled in. 2761da177e4SLinus Torvalds */ 2771da177e4SLinus Torvalds int reiserfs_allocate_list_bitmaps(struct super_block *p_s_sb, 2781da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb_array, 2791da177e4SLinus Torvalds int bmap_nr) { 2801da177e4SLinus Torvalds int i ; 2811da177e4SLinus Torvalds int failed = 0 ; 2821da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb ; 2831da177e4SLinus Torvalds int mem = bmap_nr * sizeof(struct reiserfs_bitmap_node *) ; 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds for (i = 0 ; i < JOURNAL_NUM_BITMAPS ; i++) { 2861da177e4SLinus Torvalds jb = jb_array + i ; 2871da177e4SLinus Torvalds jb->journal_list = NULL ; 2881da177e4SLinus Torvalds jb->bitmaps = vmalloc( mem ) ; 2891da177e4SLinus Torvalds if (!jb->bitmaps) { 2901da177e4SLinus Torvalds reiserfs_warning(p_s_sb, "clm-2000, unable to allocate bitmaps for journal lists") ; 2911da177e4SLinus Torvalds failed = 1; 2921da177e4SLinus Torvalds break ; 2931da177e4SLinus Torvalds } 2941da177e4SLinus Torvalds memset(jb->bitmaps, 0, mem) ; 2951da177e4SLinus Torvalds } 2961da177e4SLinus Torvalds if (failed) { 2971da177e4SLinus Torvalds free_list_bitmaps(p_s_sb, jb_array) ; 2981da177e4SLinus Torvalds return -1 ; 2991da177e4SLinus Torvalds } 3001da177e4SLinus Torvalds return 0 ; 3011da177e4SLinus Torvalds } 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds /* 3041da177e4SLinus Torvalds ** find an available list bitmap. If you can't find one, flush a commit list 3051da177e4SLinus Torvalds ** and try again 3061da177e4SLinus Torvalds */ 3071da177e4SLinus Torvalds static struct reiserfs_list_bitmap * 3081da177e4SLinus Torvalds get_list_bitmap(struct super_block *p_s_sb, struct reiserfs_journal_list *jl) { 3091da177e4SLinus Torvalds int i,j ; 3101da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 3111da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb = NULL ; 3121da177e4SLinus Torvalds 3131da177e4SLinus Torvalds for (j = 0 ; j < (JOURNAL_NUM_BITMAPS * 3) ; j++) { 3141da177e4SLinus Torvalds i = journal->j_list_bitmap_index ; 3151da177e4SLinus Torvalds journal->j_list_bitmap_index = (i + 1) % JOURNAL_NUM_BITMAPS ; 3161da177e4SLinus Torvalds jb = journal->j_list_bitmap + i ; 3171da177e4SLinus Torvalds if (journal->j_list_bitmap[i].journal_list) { 3181da177e4SLinus Torvalds flush_commit_list(p_s_sb, journal->j_list_bitmap[i].journal_list, 1) ; 3191da177e4SLinus Torvalds if (!journal->j_list_bitmap[i].journal_list) { 3201da177e4SLinus Torvalds break ; 3211da177e4SLinus Torvalds } 3221da177e4SLinus Torvalds } else { 3231da177e4SLinus Torvalds break ; 3241da177e4SLinus Torvalds } 3251da177e4SLinus Torvalds } 3261da177e4SLinus Torvalds if (jb->journal_list) { /* double check to make sure if flushed correctly */ 3271da177e4SLinus Torvalds return NULL ; 3281da177e4SLinus Torvalds } 3291da177e4SLinus Torvalds jb->journal_list = jl ; 3301da177e4SLinus Torvalds return jb ; 3311da177e4SLinus Torvalds } 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvalds /* 3341da177e4SLinus Torvalds ** allocates a new chunk of X nodes, and links them all together as a list. 3351da177e4SLinus Torvalds ** Uses the cnode->next and cnode->prev pointers 3361da177e4SLinus Torvalds ** returns NULL on failure 3371da177e4SLinus Torvalds */ 3381da177e4SLinus Torvalds static struct reiserfs_journal_cnode *allocate_cnodes(int num_cnodes) { 3391da177e4SLinus Torvalds struct reiserfs_journal_cnode *head ; 3401da177e4SLinus Torvalds int i ; 3411da177e4SLinus Torvalds if (num_cnodes <= 0) { 3421da177e4SLinus Torvalds return NULL ; 3431da177e4SLinus Torvalds } 3441da177e4SLinus Torvalds head = vmalloc(num_cnodes * sizeof(struct reiserfs_journal_cnode)) ; 3451da177e4SLinus Torvalds if (!head) { 3461da177e4SLinus Torvalds return NULL ; 3471da177e4SLinus Torvalds } 3481da177e4SLinus Torvalds memset(head, 0, num_cnodes * sizeof(struct reiserfs_journal_cnode)) ; 3491da177e4SLinus Torvalds head[0].prev = NULL ; 3501da177e4SLinus Torvalds head[0].next = head + 1 ; 3511da177e4SLinus Torvalds for (i = 1 ; i < num_cnodes; i++) { 3521da177e4SLinus Torvalds head[i].prev = head + (i - 1) ; 3531da177e4SLinus Torvalds head[i].next = head + (i + 1) ; /* if last one, overwrite it after the if */ 3541da177e4SLinus Torvalds } 3551da177e4SLinus Torvalds head[num_cnodes -1].next = NULL ; 3561da177e4SLinus Torvalds return head ; 3571da177e4SLinus Torvalds } 3581da177e4SLinus Torvalds 3591da177e4SLinus Torvalds /* 3601da177e4SLinus Torvalds ** pulls a cnode off the free list, or returns NULL on failure 3611da177e4SLinus Torvalds */ 3621da177e4SLinus Torvalds static struct reiserfs_journal_cnode *get_cnode(struct super_block *p_s_sb) { 3631da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn ; 3641da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 3651da177e4SLinus Torvalds 3661da177e4SLinus Torvalds reiserfs_check_lock_depth(p_s_sb, "get_cnode") ; 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds if (journal->j_cnode_free <= 0) { 3691da177e4SLinus Torvalds return NULL ; 3701da177e4SLinus Torvalds } 3711da177e4SLinus Torvalds journal->j_cnode_used++ ; 3721da177e4SLinus Torvalds journal->j_cnode_free-- ; 3731da177e4SLinus Torvalds cn = journal->j_cnode_free_list ; 3741da177e4SLinus Torvalds if (!cn) { 3751da177e4SLinus Torvalds return cn ; 3761da177e4SLinus Torvalds } 3771da177e4SLinus Torvalds if (cn->next) { 3781da177e4SLinus Torvalds cn->next->prev = NULL ; 3791da177e4SLinus Torvalds } 3801da177e4SLinus Torvalds journal->j_cnode_free_list = cn->next ; 3811da177e4SLinus Torvalds memset(cn, 0, sizeof(struct reiserfs_journal_cnode)) ; 3821da177e4SLinus Torvalds return cn ; 3831da177e4SLinus Torvalds } 3841da177e4SLinus Torvalds 3851da177e4SLinus Torvalds /* 3861da177e4SLinus Torvalds ** returns a cnode to the free list 3871da177e4SLinus Torvalds */ 3881da177e4SLinus Torvalds static void free_cnode(struct super_block *p_s_sb, struct reiserfs_journal_cnode *cn) { 3891da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 3901da177e4SLinus Torvalds 3911da177e4SLinus Torvalds reiserfs_check_lock_depth(p_s_sb, "free_cnode") ; 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds journal->j_cnode_used-- ; 3941da177e4SLinus Torvalds journal->j_cnode_free++ ; 3951da177e4SLinus Torvalds /* memset(cn, 0, sizeof(struct reiserfs_journal_cnode)) ; */ 3961da177e4SLinus Torvalds cn->next = journal->j_cnode_free_list ; 3971da177e4SLinus Torvalds if (journal->j_cnode_free_list) { 3981da177e4SLinus Torvalds journal->j_cnode_free_list->prev = cn ; 3991da177e4SLinus Torvalds } 4001da177e4SLinus Torvalds cn->prev = NULL ; /* not needed with the memset, but I might kill the memset, and forget to do this */ 4011da177e4SLinus Torvalds journal->j_cnode_free_list = cn ; 4021da177e4SLinus Torvalds } 4031da177e4SLinus Torvalds 4041da177e4SLinus Torvalds static void clear_prepared_bits(struct buffer_head *bh) { 4051da177e4SLinus Torvalds clear_buffer_journal_prepared (bh); 4061da177e4SLinus Torvalds clear_buffer_journal_restore_dirty (bh); 4071da177e4SLinus Torvalds } 4081da177e4SLinus Torvalds 4091da177e4SLinus Torvalds /* utility function to force a BUG if it is called without the big 4101da177e4SLinus Torvalds ** kernel lock held. caller is the string printed just before calling BUG() 4111da177e4SLinus Torvalds */ 4121da177e4SLinus Torvalds void reiserfs_check_lock_depth(struct super_block *sb, char *caller) { 4131da177e4SLinus Torvalds #ifdef CONFIG_SMP 4141da177e4SLinus Torvalds if (current->lock_depth < 0) { 4151da177e4SLinus Torvalds reiserfs_panic (sb, "%s called without kernel lock held", caller) ; 4161da177e4SLinus Torvalds } 4171da177e4SLinus Torvalds #else 4181da177e4SLinus Torvalds ; 4191da177e4SLinus Torvalds #endif 4201da177e4SLinus Torvalds } 4211da177e4SLinus Torvalds 4221da177e4SLinus Torvalds /* return a cnode with same dev, block number and size in table, or null if not found */ 4231da177e4SLinus Torvalds static inline struct reiserfs_journal_cnode * 4241da177e4SLinus Torvalds get_journal_hash_dev(struct super_block *sb, 4251da177e4SLinus Torvalds struct reiserfs_journal_cnode **table, 4261da177e4SLinus Torvalds long bl) 4271da177e4SLinus Torvalds { 4281da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn ; 4291da177e4SLinus Torvalds cn = journal_hash(table, sb, bl) ; 4301da177e4SLinus Torvalds while(cn) { 4311da177e4SLinus Torvalds if (cn->blocknr == bl && cn->sb == sb) 4321da177e4SLinus Torvalds return cn ; 4331da177e4SLinus Torvalds cn = cn->hnext ; 4341da177e4SLinus Torvalds } 4351da177e4SLinus Torvalds return (struct reiserfs_journal_cnode *)0 ; 4361da177e4SLinus Torvalds } 4371da177e4SLinus Torvalds 4381da177e4SLinus Torvalds /* 4391da177e4SLinus Torvalds ** this actually means 'can this block be reallocated yet?'. If you set search_all, a block can only be allocated 4401da177e4SLinus Torvalds ** if it is not in the current transaction, was not freed by the current transaction, and has no chance of ever 4411da177e4SLinus Torvalds ** being overwritten by a replay after crashing. 4421da177e4SLinus Torvalds ** 4431da177e4SLinus Torvalds ** If you don't set search_all, a block can only be allocated if it is not in the current transaction. Since deleting 4441da177e4SLinus Torvalds ** a block removes it from the current transaction, this case should never happen. If you don't set search_all, make 4451da177e4SLinus Torvalds ** sure you never write the block without logging it. 4461da177e4SLinus Torvalds ** 4471da177e4SLinus Torvalds ** next_zero_bit is a suggestion about the next block to try for find_forward. 4481da177e4SLinus Torvalds ** when bl is rejected because it is set in a journal list bitmap, we search 4491da177e4SLinus Torvalds ** for the next zero bit in the bitmap that rejected bl. Then, we return that 4501da177e4SLinus Torvalds ** through next_zero_bit for find_forward to try. 4511da177e4SLinus Torvalds ** 4521da177e4SLinus Torvalds ** Just because we return something in next_zero_bit does not mean we won't 4531da177e4SLinus Torvalds ** reject it on the next call to reiserfs_in_journal 4541da177e4SLinus Torvalds ** 4551da177e4SLinus Torvalds */ 4561da177e4SLinus Torvalds int reiserfs_in_journal(struct super_block *p_s_sb, 4571da177e4SLinus Torvalds int bmap_nr, int bit_nr, int search_all, 4581da177e4SLinus Torvalds b_blocknr_t *next_zero_bit) { 4591da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 4601da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn ; 4611da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb ; 4621da177e4SLinus Torvalds int i ; 4631da177e4SLinus Torvalds unsigned long bl; 4641da177e4SLinus Torvalds 4651da177e4SLinus Torvalds *next_zero_bit = 0 ; /* always start this at zero. */ 4661da177e4SLinus Torvalds 4671da177e4SLinus Torvalds PROC_INFO_INC( p_s_sb, journal.in_journal ); 4681da177e4SLinus Torvalds /* If we aren't doing a search_all, this is a metablock, and it will be logged before use. 4691da177e4SLinus Torvalds ** if we crash before the transaction that freed it commits, this transaction won't 4701da177e4SLinus Torvalds ** have committed either, and the block will never be written 4711da177e4SLinus Torvalds */ 4721da177e4SLinus Torvalds if (search_all) { 4731da177e4SLinus Torvalds for (i = 0 ; i < JOURNAL_NUM_BITMAPS ; i++) { 4741da177e4SLinus Torvalds PROC_INFO_INC( p_s_sb, journal.in_journal_bitmap ); 4751da177e4SLinus Torvalds jb = journal->j_list_bitmap + i ; 4761da177e4SLinus Torvalds if (jb->journal_list && jb->bitmaps[bmap_nr] && 4771da177e4SLinus Torvalds test_bit(bit_nr, (unsigned long *)jb->bitmaps[bmap_nr]->data)) { 4781da177e4SLinus Torvalds *next_zero_bit = find_next_zero_bit((unsigned long *) 4791da177e4SLinus Torvalds (jb->bitmaps[bmap_nr]->data), 4801da177e4SLinus Torvalds p_s_sb->s_blocksize << 3, bit_nr+1) ; 4811da177e4SLinus Torvalds return 1 ; 4821da177e4SLinus Torvalds } 4831da177e4SLinus Torvalds } 4841da177e4SLinus Torvalds } 4851da177e4SLinus Torvalds 4861da177e4SLinus Torvalds bl = bmap_nr * (p_s_sb->s_blocksize << 3) + bit_nr; 4871da177e4SLinus Torvalds /* is it in any old transactions? */ 4881da177e4SLinus Torvalds if (search_all && (cn = get_journal_hash_dev(p_s_sb, journal->j_list_hash_table, bl))) { 4891da177e4SLinus Torvalds return 1; 4901da177e4SLinus Torvalds } 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvalds /* is it in the current transaction. This should never happen */ 4931da177e4SLinus Torvalds if ((cn = get_journal_hash_dev(p_s_sb, journal->j_hash_table, bl))) { 4941da177e4SLinus Torvalds BUG(); 4951da177e4SLinus Torvalds return 1; 4961da177e4SLinus Torvalds } 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvalds PROC_INFO_INC( p_s_sb, journal.in_journal_reusable ); 4991da177e4SLinus Torvalds /* safe for reuse */ 5001da177e4SLinus Torvalds return 0 ; 5011da177e4SLinus Torvalds } 5021da177e4SLinus Torvalds 5031da177e4SLinus Torvalds /* insert cn into table 5041da177e4SLinus Torvalds */ 5051da177e4SLinus Torvalds static inline void insert_journal_hash(struct reiserfs_journal_cnode **table, struct reiserfs_journal_cnode *cn) { 5061da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn_orig ; 5071da177e4SLinus Torvalds 5081da177e4SLinus Torvalds cn_orig = journal_hash(table, cn->sb, cn->blocknr) ; 5091da177e4SLinus Torvalds cn->hnext = cn_orig ; 5101da177e4SLinus Torvalds cn->hprev = NULL ; 5111da177e4SLinus Torvalds if (cn_orig) { 5121da177e4SLinus Torvalds cn_orig->hprev = cn ; 5131da177e4SLinus Torvalds } 5141da177e4SLinus Torvalds journal_hash(table, cn->sb, cn->blocknr) = cn ; 5151da177e4SLinus Torvalds } 5161da177e4SLinus Torvalds 5171da177e4SLinus Torvalds /* lock the current transaction */ 5181da177e4SLinus Torvalds inline static void lock_journal(struct super_block *p_s_sb) { 5191da177e4SLinus Torvalds PROC_INFO_INC( p_s_sb, journal.lock_journal ); 5201da177e4SLinus Torvalds down(&SB_JOURNAL(p_s_sb)->j_lock); 5211da177e4SLinus Torvalds } 5221da177e4SLinus Torvalds 5231da177e4SLinus Torvalds /* unlock the current transaction */ 5241da177e4SLinus Torvalds inline static void unlock_journal(struct super_block *p_s_sb) { 5251da177e4SLinus Torvalds up(&SB_JOURNAL(p_s_sb)->j_lock); 5261da177e4SLinus Torvalds } 5271da177e4SLinus Torvalds 5281da177e4SLinus Torvalds static inline void get_journal_list(struct reiserfs_journal_list *jl) 5291da177e4SLinus Torvalds { 5301da177e4SLinus Torvalds jl->j_refcount++; 5311da177e4SLinus Torvalds } 5321da177e4SLinus Torvalds 5331da177e4SLinus Torvalds static inline void put_journal_list(struct super_block *s, 5341da177e4SLinus Torvalds struct reiserfs_journal_list *jl) 5351da177e4SLinus Torvalds { 5361da177e4SLinus Torvalds if (jl->j_refcount < 1) { 5371da177e4SLinus Torvalds reiserfs_panic (s, "trans id %lu, refcount at %d", jl->j_trans_id, 5381da177e4SLinus Torvalds jl->j_refcount); 5391da177e4SLinus Torvalds } 5401da177e4SLinus Torvalds if (--jl->j_refcount == 0) 5411da177e4SLinus Torvalds reiserfs_kfree(jl, sizeof(struct reiserfs_journal_list), s); 5421da177e4SLinus Torvalds } 5431da177e4SLinus Torvalds 5441da177e4SLinus Torvalds /* 5451da177e4SLinus Torvalds ** this used to be much more involved, and I'm keeping it just in case things get ugly again. 5461da177e4SLinus Torvalds ** it gets called by flush_commit_list, and cleans up any data stored about blocks freed during a 5471da177e4SLinus Torvalds ** transaction. 5481da177e4SLinus Torvalds */ 5491da177e4SLinus Torvalds static void cleanup_freed_for_journal_list(struct super_block *p_s_sb, struct reiserfs_journal_list *jl) { 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb = jl->j_list_bitmap ; 5521da177e4SLinus Torvalds if (jb) { 5531da177e4SLinus Torvalds cleanup_bitmap_list(p_s_sb, jb) ; 5541da177e4SLinus Torvalds } 5551da177e4SLinus Torvalds jl->j_list_bitmap->journal_list = NULL ; 5561da177e4SLinus Torvalds jl->j_list_bitmap = NULL ; 5571da177e4SLinus Torvalds } 5581da177e4SLinus Torvalds 5591da177e4SLinus Torvalds static int journal_list_still_alive(struct super_block *s, 5601da177e4SLinus Torvalds unsigned long trans_id) 5611da177e4SLinus Torvalds { 5621da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (s); 5631da177e4SLinus Torvalds struct list_head *entry = &journal->j_journal_list; 5641da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 5651da177e4SLinus Torvalds 5661da177e4SLinus Torvalds if (!list_empty(entry)) { 5671da177e4SLinus Torvalds jl = JOURNAL_LIST_ENTRY(entry->next); 5681da177e4SLinus Torvalds if (jl->j_trans_id <= trans_id) { 5691da177e4SLinus Torvalds return 1; 5701da177e4SLinus Torvalds } 5711da177e4SLinus Torvalds } 5721da177e4SLinus Torvalds return 0; 5731da177e4SLinus Torvalds } 5741da177e4SLinus Torvalds 5751da177e4SLinus Torvalds static void reiserfs_end_buffer_io_sync(struct buffer_head *bh, int uptodate) { 5761da177e4SLinus Torvalds char b[BDEVNAME_SIZE]; 5771da177e4SLinus Torvalds 5781da177e4SLinus Torvalds if (buffer_journaled(bh)) { 5791da177e4SLinus Torvalds reiserfs_warning(NULL, "clm-2084: pinned buffer %lu:%s sent to disk", 5801da177e4SLinus Torvalds bh->b_blocknr, bdevname(bh->b_bdev, b)) ; 5811da177e4SLinus Torvalds } 5821da177e4SLinus Torvalds if (uptodate) 5831da177e4SLinus Torvalds set_buffer_uptodate(bh) ; 5841da177e4SLinus Torvalds else 5851da177e4SLinus Torvalds clear_buffer_uptodate(bh) ; 5861da177e4SLinus Torvalds unlock_buffer(bh) ; 5871da177e4SLinus Torvalds put_bh(bh) ; 5881da177e4SLinus Torvalds } 5891da177e4SLinus Torvalds 5901da177e4SLinus Torvalds static void reiserfs_end_ordered_io(struct buffer_head *bh, int uptodate) { 5911da177e4SLinus Torvalds if (uptodate) 5921da177e4SLinus Torvalds set_buffer_uptodate(bh) ; 5931da177e4SLinus Torvalds else 5941da177e4SLinus Torvalds clear_buffer_uptodate(bh) ; 5951da177e4SLinus Torvalds unlock_buffer(bh) ; 5961da177e4SLinus Torvalds put_bh(bh) ; 5971da177e4SLinus Torvalds } 5981da177e4SLinus Torvalds 5991da177e4SLinus Torvalds static void submit_logged_buffer(struct buffer_head *bh) { 6001da177e4SLinus Torvalds get_bh(bh) ; 6011da177e4SLinus Torvalds bh->b_end_io = reiserfs_end_buffer_io_sync ; 6021da177e4SLinus Torvalds clear_buffer_journal_new (bh); 6031da177e4SLinus Torvalds clear_buffer_dirty(bh) ; 6041da177e4SLinus Torvalds if (!test_clear_buffer_journal_test (bh)) 6051da177e4SLinus Torvalds BUG(); 6061da177e4SLinus Torvalds if (!buffer_uptodate(bh)) 6071da177e4SLinus Torvalds BUG(); 6081da177e4SLinus Torvalds submit_bh(WRITE, bh) ; 6091da177e4SLinus Torvalds } 6101da177e4SLinus Torvalds 6111da177e4SLinus Torvalds static void submit_ordered_buffer(struct buffer_head *bh) { 6121da177e4SLinus Torvalds get_bh(bh) ; 6131da177e4SLinus Torvalds bh->b_end_io = reiserfs_end_ordered_io; 6141da177e4SLinus Torvalds clear_buffer_dirty(bh) ; 6151da177e4SLinus Torvalds if (!buffer_uptodate(bh)) 6161da177e4SLinus Torvalds BUG(); 6171da177e4SLinus Torvalds submit_bh(WRITE, bh) ; 6181da177e4SLinus Torvalds } 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds static int submit_barrier_buffer(struct buffer_head *bh) { 6211da177e4SLinus Torvalds get_bh(bh) ; 6221da177e4SLinus Torvalds bh->b_end_io = reiserfs_end_ordered_io; 6231da177e4SLinus Torvalds clear_buffer_dirty(bh) ; 6241da177e4SLinus Torvalds if (!buffer_uptodate(bh)) 6251da177e4SLinus Torvalds BUG(); 6261da177e4SLinus Torvalds return submit_bh(WRITE_BARRIER, bh) ; 6271da177e4SLinus Torvalds } 6281da177e4SLinus Torvalds 6291da177e4SLinus Torvalds static void check_barrier_completion(struct super_block *s, 6301da177e4SLinus Torvalds struct buffer_head *bh) { 6311da177e4SLinus Torvalds if (buffer_eopnotsupp(bh)) { 6321da177e4SLinus Torvalds clear_buffer_eopnotsupp(bh); 6331da177e4SLinus Torvalds disable_barrier(s); 6341da177e4SLinus Torvalds set_buffer_uptodate(bh); 6351da177e4SLinus Torvalds set_buffer_dirty(bh); 6361da177e4SLinus Torvalds sync_dirty_buffer(bh); 6371da177e4SLinus Torvalds } 6381da177e4SLinus Torvalds } 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds #define CHUNK_SIZE 32 6411da177e4SLinus Torvalds struct buffer_chunk { 6421da177e4SLinus Torvalds struct buffer_head *bh[CHUNK_SIZE]; 6431da177e4SLinus Torvalds int nr; 6441da177e4SLinus Torvalds }; 6451da177e4SLinus Torvalds 6461da177e4SLinus Torvalds static void write_chunk(struct buffer_chunk *chunk) { 6471da177e4SLinus Torvalds int i; 6481da177e4SLinus Torvalds for (i = 0; i < chunk->nr ; i++) { 6491da177e4SLinus Torvalds submit_logged_buffer(chunk->bh[i]) ; 6501da177e4SLinus Torvalds } 6511da177e4SLinus Torvalds chunk->nr = 0; 6521da177e4SLinus Torvalds } 6531da177e4SLinus Torvalds 6541da177e4SLinus Torvalds static void write_ordered_chunk(struct buffer_chunk *chunk) { 6551da177e4SLinus Torvalds int i; 6561da177e4SLinus Torvalds for (i = 0; i < chunk->nr ; i++) { 6571da177e4SLinus Torvalds submit_ordered_buffer(chunk->bh[i]) ; 6581da177e4SLinus Torvalds } 6591da177e4SLinus Torvalds chunk->nr = 0; 6601da177e4SLinus Torvalds } 6611da177e4SLinus Torvalds 6621da177e4SLinus Torvalds static int add_to_chunk(struct buffer_chunk *chunk, struct buffer_head *bh, 6631da177e4SLinus Torvalds spinlock_t *lock, 6641da177e4SLinus Torvalds void (fn)(struct buffer_chunk *)) 6651da177e4SLinus Torvalds { 6661da177e4SLinus Torvalds int ret = 0; 6671da177e4SLinus Torvalds if (chunk->nr >= CHUNK_SIZE) 6681da177e4SLinus Torvalds BUG(); 6691da177e4SLinus Torvalds chunk->bh[chunk->nr++] = bh; 6701da177e4SLinus Torvalds if (chunk->nr >= CHUNK_SIZE) { 6711da177e4SLinus Torvalds ret = 1; 6721da177e4SLinus Torvalds if (lock) 6731da177e4SLinus Torvalds spin_unlock(lock); 6741da177e4SLinus Torvalds fn(chunk); 6751da177e4SLinus Torvalds if (lock) 6761da177e4SLinus Torvalds spin_lock(lock); 6771da177e4SLinus Torvalds } 6781da177e4SLinus Torvalds return ret; 6791da177e4SLinus Torvalds } 6801da177e4SLinus Torvalds 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvalds static atomic_t nr_reiserfs_jh = ATOMIC_INIT(0); 6831da177e4SLinus Torvalds static struct reiserfs_jh *alloc_jh(void) { 6841da177e4SLinus Torvalds struct reiserfs_jh *jh; 6851da177e4SLinus Torvalds while(1) { 6861da177e4SLinus Torvalds jh = kmalloc(sizeof(*jh), GFP_NOFS); 6871da177e4SLinus Torvalds if (jh) { 6881da177e4SLinus Torvalds atomic_inc(&nr_reiserfs_jh); 6891da177e4SLinus Torvalds return jh; 6901da177e4SLinus Torvalds } 6911da177e4SLinus Torvalds yield(); 6921da177e4SLinus Torvalds } 6931da177e4SLinus Torvalds } 6941da177e4SLinus Torvalds 6951da177e4SLinus Torvalds /* 6961da177e4SLinus Torvalds * we want to free the jh when the buffer has been written 6971da177e4SLinus Torvalds * and waited on 6981da177e4SLinus Torvalds */ 6991da177e4SLinus Torvalds void reiserfs_free_jh(struct buffer_head *bh) { 7001da177e4SLinus Torvalds struct reiserfs_jh *jh; 7011da177e4SLinus Torvalds 7021da177e4SLinus Torvalds jh = bh->b_private; 7031da177e4SLinus Torvalds if (jh) { 7041da177e4SLinus Torvalds bh->b_private = NULL; 7051da177e4SLinus Torvalds jh->bh = NULL; 7061da177e4SLinus Torvalds list_del_init(&jh->list); 7071da177e4SLinus Torvalds kfree(jh); 7081da177e4SLinus Torvalds if (atomic_read(&nr_reiserfs_jh) <= 0) 7091da177e4SLinus Torvalds BUG(); 7101da177e4SLinus Torvalds atomic_dec(&nr_reiserfs_jh); 7111da177e4SLinus Torvalds put_bh(bh); 7121da177e4SLinus Torvalds } 7131da177e4SLinus Torvalds } 7141da177e4SLinus Torvalds 7151da177e4SLinus Torvalds static inline int __add_jh(struct reiserfs_journal *j, struct buffer_head *bh, 7161da177e4SLinus Torvalds int tail) 7171da177e4SLinus Torvalds { 7181da177e4SLinus Torvalds struct reiserfs_jh *jh; 7191da177e4SLinus Torvalds 7201da177e4SLinus Torvalds if (bh->b_private) { 7211da177e4SLinus Torvalds spin_lock(&j->j_dirty_buffers_lock); 7221da177e4SLinus Torvalds if (!bh->b_private) { 7231da177e4SLinus Torvalds spin_unlock(&j->j_dirty_buffers_lock); 7241da177e4SLinus Torvalds goto no_jh; 7251da177e4SLinus Torvalds } 7261da177e4SLinus Torvalds jh = bh->b_private; 7271da177e4SLinus Torvalds list_del_init(&jh->list); 7281da177e4SLinus Torvalds } else { 7291da177e4SLinus Torvalds no_jh: 7301da177e4SLinus Torvalds get_bh(bh); 7311da177e4SLinus Torvalds jh = alloc_jh(); 7321da177e4SLinus Torvalds spin_lock(&j->j_dirty_buffers_lock); 7331da177e4SLinus Torvalds /* buffer must be locked for __add_jh, should be able to have 7341da177e4SLinus Torvalds * two adds at the same time 7351da177e4SLinus Torvalds */ 7361da177e4SLinus Torvalds if (bh->b_private) 7371da177e4SLinus Torvalds BUG(); 7381da177e4SLinus Torvalds jh->bh = bh; 7391da177e4SLinus Torvalds bh->b_private = jh; 7401da177e4SLinus Torvalds } 7411da177e4SLinus Torvalds jh->jl = j->j_current_jl; 7421da177e4SLinus Torvalds if (tail) 7431da177e4SLinus Torvalds list_add_tail(&jh->list, &jh->jl->j_tail_bh_list); 7441da177e4SLinus Torvalds else { 7451da177e4SLinus Torvalds list_add_tail(&jh->list, &jh->jl->j_bh_list); 7461da177e4SLinus Torvalds } 7471da177e4SLinus Torvalds spin_unlock(&j->j_dirty_buffers_lock); 7481da177e4SLinus Torvalds return 0; 7491da177e4SLinus Torvalds } 7501da177e4SLinus Torvalds 7511da177e4SLinus Torvalds int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh) { 7521da177e4SLinus Torvalds return __add_jh(SB_JOURNAL(inode->i_sb), bh, 1); 7531da177e4SLinus Torvalds } 7541da177e4SLinus Torvalds int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh) { 7551da177e4SLinus Torvalds return __add_jh(SB_JOURNAL(inode->i_sb), bh, 0); 7561da177e4SLinus Torvalds } 7571da177e4SLinus Torvalds 7581da177e4SLinus Torvalds #define JH_ENTRY(l) list_entry((l), struct reiserfs_jh, list) 7591da177e4SLinus Torvalds static int write_ordered_buffers(spinlock_t *lock, 7601da177e4SLinus Torvalds struct reiserfs_journal *j, 7611da177e4SLinus Torvalds struct reiserfs_journal_list *jl, 7621da177e4SLinus Torvalds struct list_head *list) 7631da177e4SLinus Torvalds { 7641da177e4SLinus Torvalds struct buffer_head *bh; 7651da177e4SLinus Torvalds struct reiserfs_jh *jh; 7661da177e4SLinus Torvalds int ret = j->j_errno; 7671da177e4SLinus Torvalds struct buffer_chunk chunk; 7681da177e4SLinus Torvalds struct list_head tmp; 7691da177e4SLinus Torvalds INIT_LIST_HEAD(&tmp); 7701da177e4SLinus Torvalds 7711da177e4SLinus Torvalds chunk.nr = 0; 7721da177e4SLinus Torvalds spin_lock(lock); 7731da177e4SLinus Torvalds while(!list_empty(list)) { 7741da177e4SLinus Torvalds jh = JH_ENTRY(list->next); 7751da177e4SLinus Torvalds bh = jh->bh; 7761da177e4SLinus Torvalds get_bh(bh); 7771da177e4SLinus Torvalds if (test_set_buffer_locked(bh)) { 7781da177e4SLinus Torvalds if (!buffer_dirty(bh)) { 7791da177e4SLinus Torvalds list_del_init(&jh->list); 7801da177e4SLinus Torvalds list_add(&jh->list, &tmp); 7811da177e4SLinus Torvalds goto loop_next; 7821da177e4SLinus Torvalds } 7831da177e4SLinus Torvalds spin_unlock(lock); 7841da177e4SLinus Torvalds if (chunk.nr) 7851da177e4SLinus Torvalds write_ordered_chunk(&chunk); 7861da177e4SLinus Torvalds wait_on_buffer(bh); 7871da177e4SLinus Torvalds cond_resched(); 7881da177e4SLinus Torvalds spin_lock(lock); 7891da177e4SLinus Torvalds goto loop_next; 7901da177e4SLinus Torvalds } 7911da177e4SLinus Torvalds if (buffer_dirty(bh)) { 7921da177e4SLinus Torvalds list_del_init(&jh->list); 7931da177e4SLinus Torvalds list_add(&jh->list, &tmp); 7941da177e4SLinus Torvalds add_to_chunk(&chunk, bh, lock, write_ordered_chunk); 7951da177e4SLinus Torvalds } else { 7961da177e4SLinus Torvalds reiserfs_free_jh(bh); 7971da177e4SLinus Torvalds unlock_buffer(bh); 7981da177e4SLinus Torvalds } 7991da177e4SLinus Torvalds loop_next: 8001da177e4SLinus Torvalds put_bh(bh); 8011da177e4SLinus Torvalds cond_resched_lock(lock); 8021da177e4SLinus Torvalds } 8031da177e4SLinus Torvalds if (chunk.nr) { 8041da177e4SLinus Torvalds spin_unlock(lock); 8051da177e4SLinus Torvalds write_ordered_chunk(&chunk); 8061da177e4SLinus Torvalds spin_lock(lock); 8071da177e4SLinus Torvalds } 8081da177e4SLinus Torvalds while(!list_empty(&tmp)) { 8091da177e4SLinus Torvalds jh = JH_ENTRY(tmp.prev); 8101da177e4SLinus Torvalds bh = jh->bh; 8111da177e4SLinus Torvalds get_bh(bh); 8121da177e4SLinus Torvalds reiserfs_free_jh(bh); 8131da177e4SLinus Torvalds 8141da177e4SLinus Torvalds if (buffer_locked(bh)) { 8151da177e4SLinus Torvalds spin_unlock(lock); 8161da177e4SLinus Torvalds wait_on_buffer(bh); 8171da177e4SLinus Torvalds spin_lock(lock); 8181da177e4SLinus Torvalds } 8191da177e4SLinus Torvalds if (!buffer_uptodate(bh)) { 8201da177e4SLinus Torvalds ret = -EIO; 8211da177e4SLinus Torvalds } 8221da177e4SLinus Torvalds put_bh(bh); 8231da177e4SLinus Torvalds cond_resched_lock(lock); 8241da177e4SLinus Torvalds } 8251da177e4SLinus Torvalds spin_unlock(lock); 8261da177e4SLinus Torvalds return ret; 8271da177e4SLinus Torvalds } 8281da177e4SLinus Torvalds 8291da177e4SLinus Torvalds static int flush_older_commits(struct super_block *s, struct reiserfs_journal_list *jl) { 8301da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (s); 8311da177e4SLinus Torvalds struct reiserfs_journal_list *other_jl; 8321da177e4SLinus Torvalds struct reiserfs_journal_list *first_jl; 8331da177e4SLinus Torvalds struct list_head *entry; 8341da177e4SLinus Torvalds unsigned long trans_id = jl->j_trans_id; 8351da177e4SLinus Torvalds unsigned long other_trans_id; 8361da177e4SLinus Torvalds unsigned long first_trans_id; 8371da177e4SLinus Torvalds 8381da177e4SLinus Torvalds find_first: 8391da177e4SLinus Torvalds /* 8401da177e4SLinus Torvalds * first we walk backwards to find the oldest uncommitted transation 8411da177e4SLinus Torvalds */ 8421da177e4SLinus Torvalds first_jl = jl; 8431da177e4SLinus Torvalds entry = jl->j_list.prev; 8441da177e4SLinus Torvalds while(1) { 8451da177e4SLinus Torvalds other_jl = JOURNAL_LIST_ENTRY(entry); 8461da177e4SLinus Torvalds if (entry == &journal->j_journal_list || 8471da177e4SLinus Torvalds atomic_read(&other_jl->j_older_commits_done)) 8481da177e4SLinus Torvalds break; 8491da177e4SLinus Torvalds 8501da177e4SLinus Torvalds first_jl = other_jl; 8511da177e4SLinus Torvalds entry = other_jl->j_list.prev; 8521da177e4SLinus Torvalds } 8531da177e4SLinus Torvalds 8541da177e4SLinus Torvalds /* if we didn't find any older uncommitted transactions, return now */ 8551da177e4SLinus Torvalds if (first_jl == jl) { 8561da177e4SLinus Torvalds return 0; 8571da177e4SLinus Torvalds } 8581da177e4SLinus Torvalds 8591da177e4SLinus Torvalds first_trans_id = first_jl->j_trans_id; 8601da177e4SLinus Torvalds 8611da177e4SLinus Torvalds entry = &first_jl->j_list; 8621da177e4SLinus Torvalds while(1) { 8631da177e4SLinus Torvalds other_jl = JOURNAL_LIST_ENTRY(entry); 8641da177e4SLinus Torvalds other_trans_id = other_jl->j_trans_id; 8651da177e4SLinus Torvalds 8661da177e4SLinus Torvalds if (other_trans_id < trans_id) { 8671da177e4SLinus Torvalds if (atomic_read(&other_jl->j_commit_left) != 0) { 8681da177e4SLinus Torvalds flush_commit_list(s, other_jl, 0); 8691da177e4SLinus Torvalds 8701da177e4SLinus Torvalds /* list we were called with is gone, return */ 8711da177e4SLinus Torvalds if (!journal_list_still_alive(s, trans_id)) 8721da177e4SLinus Torvalds return 1; 8731da177e4SLinus Torvalds 8741da177e4SLinus Torvalds /* the one we just flushed is gone, this means all 8751da177e4SLinus Torvalds * older lists are also gone, so first_jl is no longer 8761da177e4SLinus Torvalds * valid either. Go back to the beginning. 8771da177e4SLinus Torvalds */ 8781da177e4SLinus Torvalds if (!journal_list_still_alive(s, other_trans_id)) { 8791da177e4SLinus Torvalds goto find_first; 8801da177e4SLinus Torvalds } 8811da177e4SLinus Torvalds } 8821da177e4SLinus Torvalds entry = entry->next; 8831da177e4SLinus Torvalds if (entry == &journal->j_journal_list) 8841da177e4SLinus Torvalds return 0; 8851da177e4SLinus Torvalds } else { 8861da177e4SLinus Torvalds return 0; 8871da177e4SLinus Torvalds } 8881da177e4SLinus Torvalds } 8891da177e4SLinus Torvalds return 0; 8901da177e4SLinus Torvalds } 8911da177e4SLinus Torvalds int reiserfs_async_progress_wait(struct super_block *s) { 8921da177e4SLinus Torvalds DEFINE_WAIT(wait); 8931da177e4SLinus Torvalds struct reiserfs_journal *j = SB_JOURNAL(s); 8941da177e4SLinus Torvalds if (atomic_read(&j->j_async_throttle)) 8951da177e4SLinus Torvalds blk_congestion_wait(WRITE, HZ/10); 8961da177e4SLinus Torvalds return 0; 8971da177e4SLinus Torvalds } 8981da177e4SLinus Torvalds 8991da177e4SLinus Torvalds /* 9001da177e4SLinus Torvalds ** if this journal list still has commit blocks unflushed, send them to disk. 9011da177e4SLinus Torvalds ** 9021da177e4SLinus Torvalds ** log areas must be flushed in order (transaction 2 can't commit before transaction 1) 9031da177e4SLinus Torvalds ** Before the commit block can by written, every other log block must be safely on disk 9041da177e4SLinus Torvalds ** 9051da177e4SLinus Torvalds */ 9061da177e4SLinus Torvalds static int flush_commit_list(struct super_block *s, struct reiserfs_journal_list *jl, int flushall) { 9071da177e4SLinus Torvalds int i; 9081da177e4SLinus Torvalds int bn ; 9091da177e4SLinus Torvalds struct buffer_head *tbh = NULL ; 9101da177e4SLinus Torvalds unsigned long trans_id = jl->j_trans_id; 9111da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (s); 9121da177e4SLinus Torvalds int barrier = 0; 9131da177e4SLinus Torvalds int retval = 0; 9141da177e4SLinus Torvalds 9151da177e4SLinus Torvalds reiserfs_check_lock_depth(s, "flush_commit_list") ; 9161da177e4SLinus Torvalds 9171da177e4SLinus Torvalds if (atomic_read(&jl->j_older_commits_done)) { 9181da177e4SLinus Torvalds return 0 ; 9191da177e4SLinus Torvalds } 9201da177e4SLinus Torvalds 9211da177e4SLinus Torvalds /* before we can put our commit blocks on disk, we have to make sure everyone older than 9221da177e4SLinus Torvalds ** us is on disk too 9231da177e4SLinus Torvalds */ 9241da177e4SLinus Torvalds BUG_ON (jl->j_len <= 0); 9251da177e4SLinus Torvalds BUG_ON (trans_id == journal->j_trans_id); 9261da177e4SLinus Torvalds 9271da177e4SLinus Torvalds get_journal_list(jl); 9281da177e4SLinus Torvalds if (flushall) { 9291da177e4SLinus Torvalds if (flush_older_commits(s, jl) == 1) { 9301da177e4SLinus Torvalds /* list disappeared during flush_older_commits. return */ 9311da177e4SLinus Torvalds goto put_jl; 9321da177e4SLinus Torvalds } 9331da177e4SLinus Torvalds } 9341da177e4SLinus Torvalds 9351da177e4SLinus Torvalds /* make sure nobody is trying to flush this one at the same time */ 9361da177e4SLinus Torvalds down(&jl->j_commit_lock); 9371da177e4SLinus Torvalds if (!journal_list_still_alive(s, trans_id)) { 9381da177e4SLinus Torvalds up(&jl->j_commit_lock); 9391da177e4SLinus Torvalds goto put_jl; 9401da177e4SLinus Torvalds } 9411da177e4SLinus Torvalds BUG_ON (jl->j_trans_id == 0); 9421da177e4SLinus Torvalds 9431da177e4SLinus Torvalds /* this commit is done, exit */ 9441da177e4SLinus Torvalds if (atomic_read(&(jl->j_commit_left)) <= 0) { 9451da177e4SLinus Torvalds if (flushall) { 9461da177e4SLinus Torvalds atomic_set(&(jl->j_older_commits_done), 1) ; 9471da177e4SLinus Torvalds } 9481da177e4SLinus Torvalds up(&jl->j_commit_lock); 9491da177e4SLinus Torvalds goto put_jl; 9501da177e4SLinus Torvalds } 9511da177e4SLinus Torvalds 9521da177e4SLinus Torvalds if (!list_empty(&jl->j_bh_list)) { 9531da177e4SLinus Torvalds unlock_kernel(); 9541da177e4SLinus Torvalds write_ordered_buffers(&journal->j_dirty_buffers_lock, 9551da177e4SLinus Torvalds journal, jl, &jl->j_bh_list); 9561da177e4SLinus Torvalds lock_kernel(); 9571da177e4SLinus Torvalds } 9581da177e4SLinus Torvalds BUG_ON (!list_empty(&jl->j_bh_list)); 9591da177e4SLinus Torvalds /* 9601da177e4SLinus Torvalds * for the description block and all the log blocks, submit any buffers 9611da177e4SLinus Torvalds * that haven't already reached the disk 9621da177e4SLinus Torvalds */ 9631da177e4SLinus Torvalds atomic_inc(&journal->j_async_throttle); 9641da177e4SLinus Torvalds for (i = 0 ; i < (jl->j_len + 1) ; i++) { 9651da177e4SLinus Torvalds bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + (jl->j_start+i) % 9661da177e4SLinus Torvalds SB_ONDISK_JOURNAL_SIZE(s); 9671da177e4SLinus Torvalds tbh = journal_find_get_block(s, bn) ; 9681da177e4SLinus Torvalds if (buffer_dirty(tbh)) /* redundant, ll_rw_block() checks */ 9691da177e4SLinus Torvalds ll_rw_block(WRITE, 1, &tbh) ; 9701da177e4SLinus Torvalds put_bh(tbh) ; 9711da177e4SLinus Torvalds } 9721da177e4SLinus Torvalds atomic_dec(&journal->j_async_throttle); 9731da177e4SLinus Torvalds 9741da177e4SLinus Torvalds /* wait on everything written so far before writing the commit 9751da177e4SLinus Torvalds * if we are in barrier mode, send the commit down now 9761da177e4SLinus Torvalds */ 9771da177e4SLinus Torvalds barrier = reiserfs_barrier_flush(s); 9781da177e4SLinus Torvalds if (barrier) { 9791da177e4SLinus Torvalds int ret; 9801da177e4SLinus Torvalds lock_buffer(jl->j_commit_bh); 9811da177e4SLinus Torvalds ret = submit_barrier_buffer(jl->j_commit_bh); 9821da177e4SLinus Torvalds if (ret == -EOPNOTSUPP) { 9831da177e4SLinus Torvalds set_buffer_uptodate(jl->j_commit_bh); 9841da177e4SLinus Torvalds disable_barrier(s); 9851da177e4SLinus Torvalds barrier = 0; 9861da177e4SLinus Torvalds } 9871da177e4SLinus Torvalds } 9881da177e4SLinus Torvalds for (i = 0 ; i < (jl->j_len + 1) ; i++) { 9891da177e4SLinus Torvalds bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + 9901da177e4SLinus Torvalds (jl->j_start + i) % SB_ONDISK_JOURNAL_SIZE(s) ; 9911da177e4SLinus Torvalds tbh = journal_find_get_block(s, bn) ; 9921da177e4SLinus Torvalds wait_on_buffer(tbh) ; 9931da177e4SLinus Torvalds // since we're using ll_rw_blk above, it might have skipped over 9941da177e4SLinus Torvalds // a locked buffer. Double check here 9951da177e4SLinus Torvalds // 9961da177e4SLinus Torvalds if (buffer_dirty(tbh)) /* redundant, sync_dirty_buffer() checks */ 9971da177e4SLinus Torvalds sync_dirty_buffer(tbh); 9981da177e4SLinus Torvalds if (unlikely (!buffer_uptodate(tbh))) { 9991da177e4SLinus Torvalds #ifdef CONFIG_REISERFS_CHECK 10001da177e4SLinus Torvalds reiserfs_warning(s, "journal-601, buffer write failed") ; 10011da177e4SLinus Torvalds #endif 10021da177e4SLinus Torvalds retval = -EIO; 10031da177e4SLinus Torvalds } 10041da177e4SLinus Torvalds put_bh(tbh) ; /* once for journal_find_get_block */ 10051da177e4SLinus Torvalds put_bh(tbh) ; /* once due to original getblk in do_journal_end */ 10061da177e4SLinus Torvalds atomic_dec(&(jl->j_commit_left)) ; 10071da177e4SLinus Torvalds } 10081da177e4SLinus Torvalds 10091da177e4SLinus Torvalds BUG_ON (atomic_read(&(jl->j_commit_left)) != 1); 10101da177e4SLinus Torvalds 10111da177e4SLinus Torvalds if (!barrier) { 10121da177e4SLinus Torvalds if (buffer_dirty(jl->j_commit_bh)) 10131da177e4SLinus Torvalds BUG(); 10141da177e4SLinus Torvalds mark_buffer_dirty(jl->j_commit_bh) ; 10151da177e4SLinus Torvalds sync_dirty_buffer(jl->j_commit_bh) ; 10161da177e4SLinus Torvalds } else 10171da177e4SLinus Torvalds wait_on_buffer(jl->j_commit_bh); 10181da177e4SLinus Torvalds 10191da177e4SLinus Torvalds check_barrier_completion(s, jl->j_commit_bh); 10201da177e4SLinus Torvalds 10211da177e4SLinus Torvalds /* If there was a write error in the journal - we can't commit this 10221da177e4SLinus Torvalds * transaction - it will be invalid and, if successful, will just end 10231da177e4SLinus Torvalds * up propogating the write error out to the filesystem. */ 10241da177e4SLinus Torvalds if (unlikely (!buffer_uptodate(jl->j_commit_bh))) { 10251da177e4SLinus Torvalds #ifdef CONFIG_REISERFS_CHECK 10261da177e4SLinus Torvalds reiserfs_warning(s, "journal-615: buffer write failed") ; 10271da177e4SLinus Torvalds #endif 10281da177e4SLinus Torvalds retval = -EIO; 10291da177e4SLinus Torvalds } 10301da177e4SLinus Torvalds bforget(jl->j_commit_bh) ; 10311da177e4SLinus Torvalds if (journal->j_last_commit_id != 0 && 10321da177e4SLinus Torvalds (jl->j_trans_id - journal->j_last_commit_id) != 1) { 10331da177e4SLinus Torvalds reiserfs_warning(s, "clm-2200: last commit %lu, current %lu", 10341da177e4SLinus Torvalds journal->j_last_commit_id, 10351da177e4SLinus Torvalds jl->j_trans_id); 10361da177e4SLinus Torvalds } 10371da177e4SLinus Torvalds journal->j_last_commit_id = jl->j_trans_id; 10381da177e4SLinus Torvalds 10391da177e4SLinus Torvalds /* now, every commit block is on the disk. It is safe to allow blocks freed during this transaction to be reallocated */ 10401da177e4SLinus Torvalds cleanup_freed_for_journal_list(s, jl) ; 10411da177e4SLinus Torvalds 10421da177e4SLinus Torvalds retval = retval ? retval : journal->j_errno; 10431da177e4SLinus Torvalds 10441da177e4SLinus Torvalds /* mark the metadata dirty */ 10451da177e4SLinus Torvalds if (!retval) 10461da177e4SLinus Torvalds dirty_one_transaction(s, jl); 10471da177e4SLinus Torvalds atomic_dec(&(jl->j_commit_left)) ; 10481da177e4SLinus Torvalds 10491da177e4SLinus Torvalds if (flushall) { 10501da177e4SLinus Torvalds atomic_set(&(jl->j_older_commits_done), 1) ; 10511da177e4SLinus Torvalds } 10521da177e4SLinus Torvalds up(&jl->j_commit_lock); 10531da177e4SLinus Torvalds put_jl: 10541da177e4SLinus Torvalds put_journal_list(s, jl); 10551da177e4SLinus Torvalds 10561da177e4SLinus Torvalds if (retval) 10571da177e4SLinus Torvalds reiserfs_abort (s, retval, "Journal write error in %s", __FUNCTION__); 10581da177e4SLinus Torvalds return retval; 10591da177e4SLinus Torvalds } 10601da177e4SLinus Torvalds 10611da177e4SLinus Torvalds /* 10621da177e4SLinus Torvalds ** flush_journal_list frequently needs to find a newer transaction for a given block. This does that, or 10631da177e4SLinus Torvalds ** returns NULL if it can't find anything 10641da177e4SLinus Torvalds */ 10651da177e4SLinus Torvalds static struct reiserfs_journal_list *find_newer_jl_for_cn(struct reiserfs_journal_cnode *cn) { 10661da177e4SLinus Torvalds struct super_block *sb = cn->sb; 10671da177e4SLinus Torvalds b_blocknr_t blocknr = cn->blocknr ; 10681da177e4SLinus Torvalds 10691da177e4SLinus Torvalds cn = cn->hprev ; 10701da177e4SLinus Torvalds while(cn) { 10711da177e4SLinus Torvalds if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist) { 10721da177e4SLinus Torvalds return cn->jlist ; 10731da177e4SLinus Torvalds } 10741da177e4SLinus Torvalds cn = cn->hprev ; 10751da177e4SLinus Torvalds } 10761da177e4SLinus Torvalds return NULL ; 10771da177e4SLinus Torvalds } 10781da177e4SLinus Torvalds 10791da177e4SLinus Torvalds static void remove_journal_hash(struct super_block *, struct reiserfs_journal_cnode **, 10801da177e4SLinus Torvalds struct reiserfs_journal_list *, unsigned long, int); 10811da177e4SLinus Torvalds 10821da177e4SLinus Torvalds /* 10831da177e4SLinus Torvalds ** once all the real blocks have been flushed, it is safe to remove them from the 10841da177e4SLinus Torvalds ** journal list for this transaction. Aside from freeing the cnode, this also allows the 10851da177e4SLinus Torvalds ** block to be reallocated for data blocks if it had been deleted. 10861da177e4SLinus Torvalds */ 10871da177e4SLinus Torvalds static void remove_all_from_journal_list(struct super_block *p_s_sb, struct reiserfs_journal_list *jl, int debug) { 10881da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 10891da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn, *last ; 10901da177e4SLinus Torvalds cn = jl->j_realblock ; 10911da177e4SLinus Torvalds 10921da177e4SLinus Torvalds /* which is better, to lock once around the whole loop, or 10931da177e4SLinus Torvalds ** to lock for each call to remove_journal_hash? 10941da177e4SLinus Torvalds */ 10951da177e4SLinus Torvalds while(cn) { 10961da177e4SLinus Torvalds if (cn->blocknr != 0) { 10971da177e4SLinus Torvalds if (debug) { 10981da177e4SLinus Torvalds reiserfs_warning (p_s_sb, "block %u, bh is %d, state %ld", cn->blocknr, 10991da177e4SLinus Torvalds cn->bh ? 1: 0, cn->state) ; 11001da177e4SLinus Torvalds } 11011da177e4SLinus Torvalds cn->state = 0 ; 11021da177e4SLinus Torvalds remove_journal_hash(p_s_sb, journal->j_list_hash_table, jl, cn->blocknr, 1) ; 11031da177e4SLinus Torvalds } 11041da177e4SLinus Torvalds last = cn ; 11051da177e4SLinus Torvalds cn = cn->next ; 11061da177e4SLinus Torvalds free_cnode(p_s_sb, last) ; 11071da177e4SLinus Torvalds } 11081da177e4SLinus Torvalds jl->j_realblock = NULL ; 11091da177e4SLinus Torvalds } 11101da177e4SLinus Torvalds 11111da177e4SLinus Torvalds /* 11121da177e4SLinus Torvalds ** if this timestamp is greater than the timestamp we wrote last to the header block, write it to the header block. 11131da177e4SLinus Torvalds ** once this is done, I can safely say the log area for this transaction won't ever be replayed, and I can start 11141da177e4SLinus Torvalds ** releasing blocks in this transaction for reuse as data blocks. 11151da177e4SLinus Torvalds ** called by flush_journal_list, before it calls remove_all_from_journal_list 11161da177e4SLinus Torvalds ** 11171da177e4SLinus Torvalds */ 11181da177e4SLinus Torvalds static int _update_journal_header_block(struct super_block *p_s_sb, unsigned long offset, unsigned long trans_id) { 11191da177e4SLinus Torvalds struct reiserfs_journal_header *jh ; 11201da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 11211da177e4SLinus Torvalds 11221da177e4SLinus Torvalds if (reiserfs_is_journal_aborted (journal)) 11231da177e4SLinus Torvalds return -EIO; 11241da177e4SLinus Torvalds 11251da177e4SLinus Torvalds if (trans_id >= journal->j_last_flush_trans_id) { 11261da177e4SLinus Torvalds if (buffer_locked((journal->j_header_bh))) { 11271da177e4SLinus Torvalds wait_on_buffer((journal->j_header_bh)) ; 11281da177e4SLinus Torvalds if (unlikely (!buffer_uptodate(journal->j_header_bh))) { 11291da177e4SLinus Torvalds #ifdef CONFIG_REISERFS_CHECK 11301da177e4SLinus Torvalds reiserfs_warning (p_s_sb, "journal-699: buffer write failed") ; 11311da177e4SLinus Torvalds #endif 11321da177e4SLinus Torvalds return -EIO; 11331da177e4SLinus Torvalds } 11341da177e4SLinus Torvalds } 11351da177e4SLinus Torvalds journal->j_last_flush_trans_id = trans_id ; 11361da177e4SLinus Torvalds journal->j_first_unflushed_offset = offset ; 11371da177e4SLinus Torvalds jh = (struct reiserfs_journal_header *)(journal->j_header_bh->b_data) ; 11381da177e4SLinus Torvalds jh->j_last_flush_trans_id = cpu_to_le32(trans_id) ; 11391da177e4SLinus Torvalds jh->j_first_unflushed_offset = cpu_to_le32(offset) ; 11401da177e4SLinus Torvalds jh->j_mount_id = cpu_to_le32(journal->j_mount_id) ; 11411da177e4SLinus Torvalds 11421da177e4SLinus Torvalds if (reiserfs_barrier_flush(p_s_sb)) { 11431da177e4SLinus Torvalds int ret; 11441da177e4SLinus Torvalds lock_buffer(journal->j_header_bh); 11451da177e4SLinus Torvalds ret = submit_barrier_buffer(journal->j_header_bh); 11461da177e4SLinus Torvalds if (ret == -EOPNOTSUPP) { 11471da177e4SLinus Torvalds set_buffer_uptodate(journal->j_header_bh); 11481da177e4SLinus Torvalds disable_barrier(p_s_sb); 11491da177e4SLinus Torvalds goto sync; 11501da177e4SLinus Torvalds } 11511da177e4SLinus Torvalds wait_on_buffer(journal->j_header_bh); 11521da177e4SLinus Torvalds check_barrier_completion(p_s_sb, journal->j_header_bh); 11531da177e4SLinus Torvalds } else { 11541da177e4SLinus Torvalds sync: 11551da177e4SLinus Torvalds set_buffer_dirty(journal->j_header_bh) ; 11561da177e4SLinus Torvalds sync_dirty_buffer(journal->j_header_bh) ; 11571da177e4SLinus Torvalds } 11581da177e4SLinus Torvalds if (!buffer_uptodate(journal->j_header_bh)) { 11591da177e4SLinus Torvalds reiserfs_warning (p_s_sb, "journal-837: IO error during journal replay"); 11601da177e4SLinus Torvalds return -EIO ; 11611da177e4SLinus Torvalds } 11621da177e4SLinus Torvalds } 11631da177e4SLinus Torvalds return 0 ; 11641da177e4SLinus Torvalds } 11651da177e4SLinus Torvalds 11661da177e4SLinus Torvalds static int update_journal_header_block(struct super_block *p_s_sb, 11671da177e4SLinus Torvalds unsigned long offset, 11681da177e4SLinus Torvalds unsigned long trans_id) { 11691da177e4SLinus Torvalds return _update_journal_header_block(p_s_sb, offset, trans_id); 11701da177e4SLinus Torvalds } 11711da177e4SLinus Torvalds /* 11721da177e4SLinus Torvalds ** flush any and all journal lists older than you are 11731da177e4SLinus Torvalds ** can only be called from flush_journal_list 11741da177e4SLinus Torvalds */ 11751da177e4SLinus Torvalds static int flush_older_journal_lists(struct super_block *p_s_sb, 11761da177e4SLinus Torvalds struct reiserfs_journal_list *jl) 11771da177e4SLinus Torvalds { 11781da177e4SLinus Torvalds struct list_head *entry; 11791da177e4SLinus Torvalds struct reiserfs_journal_list *other_jl ; 11801da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 11811da177e4SLinus Torvalds unsigned long trans_id = jl->j_trans_id; 11821da177e4SLinus Torvalds 11831da177e4SLinus Torvalds /* we know we are the only ones flushing things, no extra race 11841da177e4SLinus Torvalds * protection is required. 11851da177e4SLinus Torvalds */ 11861da177e4SLinus Torvalds restart: 11871da177e4SLinus Torvalds entry = journal->j_journal_list.next; 11881da177e4SLinus Torvalds /* Did we wrap? */ 11891da177e4SLinus Torvalds if (entry == &journal->j_journal_list) 11901da177e4SLinus Torvalds return 0; 11911da177e4SLinus Torvalds other_jl = JOURNAL_LIST_ENTRY(entry); 11921da177e4SLinus Torvalds if (other_jl->j_trans_id < trans_id) { 11931da177e4SLinus Torvalds BUG_ON (other_jl->j_refcount <= 0); 11941da177e4SLinus Torvalds /* do not flush all */ 11951da177e4SLinus Torvalds flush_journal_list(p_s_sb, other_jl, 0) ; 11961da177e4SLinus Torvalds 11971da177e4SLinus Torvalds /* other_jl is now deleted from the list */ 11981da177e4SLinus Torvalds goto restart; 11991da177e4SLinus Torvalds } 12001da177e4SLinus Torvalds return 0 ; 12011da177e4SLinus Torvalds } 12021da177e4SLinus Torvalds 12031da177e4SLinus Torvalds static void del_from_work_list(struct super_block *s, 12041da177e4SLinus Torvalds struct reiserfs_journal_list *jl) { 12051da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (s); 12061da177e4SLinus Torvalds if (!list_empty(&jl->j_working_list)) { 12071da177e4SLinus Torvalds list_del_init(&jl->j_working_list); 12081da177e4SLinus Torvalds journal->j_num_work_lists--; 12091da177e4SLinus Torvalds } 12101da177e4SLinus Torvalds } 12111da177e4SLinus Torvalds 12121da177e4SLinus Torvalds /* flush a journal list, both commit and real blocks 12131da177e4SLinus Torvalds ** 12141da177e4SLinus Torvalds ** always set flushall to 1, unless you are calling from inside 12151da177e4SLinus Torvalds ** flush_journal_list 12161da177e4SLinus Torvalds ** 12171da177e4SLinus Torvalds ** IMPORTANT. This can only be called while there are no journal writers, 12181da177e4SLinus Torvalds ** and the journal is locked. That means it can only be called from 12191da177e4SLinus Torvalds ** do_journal_end, or by journal_release 12201da177e4SLinus Torvalds */ 12211da177e4SLinus Torvalds static int flush_journal_list(struct super_block *s, 12221da177e4SLinus Torvalds struct reiserfs_journal_list *jl, int flushall) { 12231da177e4SLinus Torvalds struct reiserfs_journal_list *pjl ; 12241da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn, *last ; 12251da177e4SLinus Torvalds int count ; 12261da177e4SLinus Torvalds int was_jwait = 0 ; 12271da177e4SLinus Torvalds int was_dirty = 0 ; 12281da177e4SLinus Torvalds struct buffer_head *saved_bh ; 12291da177e4SLinus Torvalds unsigned long j_len_saved = jl->j_len ; 12301da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (s); 12311da177e4SLinus Torvalds int err = 0; 12321da177e4SLinus Torvalds 12331da177e4SLinus Torvalds BUG_ON (j_len_saved <= 0); 12341da177e4SLinus Torvalds 12351da177e4SLinus Torvalds if (atomic_read(&journal->j_wcount) != 0) { 12361da177e4SLinus Torvalds reiserfs_warning(s, "clm-2048: flush_journal_list called with wcount %d", 12371da177e4SLinus Torvalds atomic_read(&journal->j_wcount)) ; 12381da177e4SLinus Torvalds } 12391da177e4SLinus Torvalds BUG_ON (jl->j_trans_id == 0); 12401da177e4SLinus Torvalds 12411da177e4SLinus Torvalds /* if flushall == 0, the lock is already held */ 12421da177e4SLinus Torvalds if (flushall) { 12431da177e4SLinus Torvalds down(&journal->j_flush_sem); 12441da177e4SLinus Torvalds } else if (!down_trylock(&journal->j_flush_sem)) { 12451da177e4SLinus Torvalds BUG(); 12461da177e4SLinus Torvalds } 12471da177e4SLinus Torvalds 12481da177e4SLinus Torvalds count = 0 ; 12491da177e4SLinus Torvalds if (j_len_saved > journal->j_trans_max) { 12501da177e4SLinus Torvalds reiserfs_panic(s, "journal-715: flush_journal_list, length is %lu, trans id %lu\n", j_len_saved, jl->j_trans_id); 12511da177e4SLinus Torvalds return 0 ; 12521da177e4SLinus Torvalds } 12531da177e4SLinus Torvalds 12541da177e4SLinus Torvalds /* if all the work is already done, get out of here */ 12551da177e4SLinus Torvalds if (atomic_read(&(jl->j_nonzerolen)) <= 0 && 12561da177e4SLinus Torvalds atomic_read(&(jl->j_commit_left)) <= 0) { 12571da177e4SLinus Torvalds goto flush_older_and_return ; 12581da177e4SLinus Torvalds } 12591da177e4SLinus Torvalds 12601da177e4SLinus Torvalds /* start by putting the commit list on disk. This will also flush 12611da177e4SLinus Torvalds ** the commit lists of any olders transactions 12621da177e4SLinus Torvalds */ 12631da177e4SLinus Torvalds flush_commit_list(s, jl, 1) ; 12641da177e4SLinus Torvalds 12651da177e4SLinus Torvalds if (!(jl->j_state & LIST_DIRTY) && !reiserfs_is_journal_aborted (journal)) 12661da177e4SLinus Torvalds BUG(); 12671da177e4SLinus Torvalds 12681da177e4SLinus Torvalds /* are we done now? */ 12691da177e4SLinus Torvalds if (atomic_read(&(jl->j_nonzerolen)) <= 0 && 12701da177e4SLinus Torvalds atomic_read(&(jl->j_commit_left)) <= 0) { 12711da177e4SLinus Torvalds goto flush_older_and_return ; 12721da177e4SLinus Torvalds } 12731da177e4SLinus Torvalds 12741da177e4SLinus Torvalds /* loop through each cnode, see if we need to write it, 12751da177e4SLinus Torvalds ** or wait on a more recent transaction, or just ignore it 12761da177e4SLinus Torvalds */ 12771da177e4SLinus Torvalds if (atomic_read(&(journal->j_wcount)) != 0) { 12781da177e4SLinus Torvalds reiserfs_panic(s, "journal-844: panic journal list is flushing, wcount is not 0\n") ; 12791da177e4SLinus Torvalds } 12801da177e4SLinus Torvalds cn = jl->j_realblock ; 12811da177e4SLinus Torvalds while(cn) { 12821da177e4SLinus Torvalds was_jwait = 0 ; 12831da177e4SLinus Torvalds was_dirty = 0 ; 12841da177e4SLinus Torvalds saved_bh = NULL ; 12851da177e4SLinus Torvalds /* blocknr of 0 is no longer in the hash, ignore it */ 12861da177e4SLinus Torvalds if (cn->blocknr == 0) { 12871da177e4SLinus Torvalds goto free_cnode ; 12881da177e4SLinus Torvalds } 12891da177e4SLinus Torvalds 12901da177e4SLinus Torvalds /* This transaction failed commit. Don't write out to the disk */ 12911da177e4SLinus Torvalds if (!(jl->j_state & LIST_DIRTY)) 12921da177e4SLinus Torvalds goto free_cnode; 12931da177e4SLinus Torvalds 12941da177e4SLinus Torvalds pjl = find_newer_jl_for_cn(cn) ; 12951da177e4SLinus Torvalds /* the order is important here. We check pjl to make sure we 12961da177e4SLinus Torvalds ** don't clear BH_JDirty_wait if we aren't the one writing this 12971da177e4SLinus Torvalds ** block to disk 12981da177e4SLinus Torvalds */ 12991da177e4SLinus Torvalds if (!pjl && cn->bh) { 13001da177e4SLinus Torvalds saved_bh = cn->bh ; 13011da177e4SLinus Torvalds 13021da177e4SLinus Torvalds /* we do this to make sure nobody releases the buffer while 13031da177e4SLinus Torvalds ** we are working with it 13041da177e4SLinus Torvalds */ 13051da177e4SLinus Torvalds get_bh(saved_bh) ; 13061da177e4SLinus Torvalds 13071da177e4SLinus Torvalds if (buffer_journal_dirty(saved_bh)) { 13081da177e4SLinus Torvalds BUG_ON (!can_dirty (cn)); 13091da177e4SLinus Torvalds was_jwait = 1 ; 13101da177e4SLinus Torvalds was_dirty = 1 ; 13111da177e4SLinus Torvalds } else if (can_dirty(cn)) { 13121da177e4SLinus Torvalds /* everything with !pjl && jwait should be writable */ 13131da177e4SLinus Torvalds BUG(); 13141da177e4SLinus Torvalds } 13151da177e4SLinus Torvalds } 13161da177e4SLinus Torvalds 13171da177e4SLinus Torvalds /* if someone has this block in a newer transaction, just make 13181da177e4SLinus Torvalds ** sure they are commited, and don't try writing it to disk 13191da177e4SLinus Torvalds */ 13201da177e4SLinus Torvalds if (pjl) { 13211da177e4SLinus Torvalds if (atomic_read(&pjl->j_commit_left)) 13221da177e4SLinus Torvalds flush_commit_list(s, pjl, 1) ; 13231da177e4SLinus Torvalds goto free_cnode ; 13241da177e4SLinus Torvalds } 13251da177e4SLinus Torvalds 13261da177e4SLinus Torvalds /* bh == NULL when the block got to disk on its own, OR, 13271da177e4SLinus Torvalds ** the block got freed in a future transaction 13281da177e4SLinus Torvalds */ 13291da177e4SLinus Torvalds if (saved_bh == NULL) { 13301da177e4SLinus Torvalds goto free_cnode ; 13311da177e4SLinus Torvalds } 13321da177e4SLinus Torvalds 13331da177e4SLinus Torvalds /* this should never happen. kupdate_one_transaction has this list 13341da177e4SLinus Torvalds ** locked while it works, so we should never see a buffer here that 13351da177e4SLinus Torvalds ** is not marked JDirty_wait 13361da177e4SLinus Torvalds */ 13371da177e4SLinus Torvalds if ((!was_jwait) && !buffer_locked(saved_bh)) { 13381da177e4SLinus Torvalds reiserfs_warning (s, "journal-813: BAD! buffer %llu %cdirty %cjwait, " 13391da177e4SLinus Torvalds "not in a newer tranasction", 13401da177e4SLinus Torvalds (unsigned long long)saved_bh->b_blocknr, 13411da177e4SLinus Torvalds was_dirty ? ' ' : '!', was_jwait ? ' ' : '!') ; 13421da177e4SLinus Torvalds } 13431da177e4SLinus Torvalds if (was_dirty) { 13441da177e4SLinus Torvalds /* we inc again because saved_bh gets decremented at free_cnode */ 13451da177e4SLinus Torvalds get_bh(saved_bh) ; 13461da177e4SLinus Torvalds set_bit(BLOCK_NEEDS_FLUSH, &cn->state) ; 13471da177e4SLinus Torvalds lock_buffer(saved_bh); 13481da177e4SLinus Torvalds BUG_ON (cn->blocknr != saved_bh->b_blocknr); 13491da177e4SLinus Torvalds if (buffer_dirty(saved_bh)) 13501da177e4SLinus Torvalds submit_logged_buffer(saved_bh) ; 13511da177e4SLinus Torvalds else 13521da177e4SLinus Torvalds unlock_buffer(saved_bh); 13531da177e4SLinus Torvalds count++ ; 13541da177e4SLinus Torvalds } else { 13551da177e4SLinus Torvalds reiserfs_warning (s, "clm-2082: Unable to flush buffer %llu in %s", 13561da177e4SLinus Torvalds (unsigned long long)saved_bh->b_blocknr, __FUNCTION__); 13571da177e4SLinus Torvalds } 13581da177e4SLinus Torvalds free_cnode: 13591da177e4SLinus Torvalds last = cn ; 13601da177e4SLinus Torvalds cn = cn->next ; 13611da177e4SLinus Torvalds if (saved_bh) { 13621da177e4SLinus Torvalds /* we incremented this to keep others from taking the buffer head away */ 13631da177e4SLinus Torvalds put_bh(saved_bh) ; 13641da177e4SLinus Torvalds if (atomic_read(&(saved_bh->b_count)) < 0) { 13651da177e4SLinus Torvalds reiserfs_warning (s, "journal-945: saved_bh->b_count < 0"); 13661da177e4SLinus Torvalds } 13671da177e4SLinus Torvalds } 13681da177e4SLinus Torvalds } 13691da177e4SLinus Torvalds if (count > 0) { 13701da177e4SLinus Torvalds cn = jl->j_realblock ; 13711da177e4SLinus Torvalds while(cn) { 13721da177e4SLinus Torvalds if (test_bit(BLOCK_NEEDS_FLUSH, &cn->state)) { 13731da177e4SLinus Torvalds if (!cn->bh) { 13741da177e4SLinus Torvalds reiserfs_panic(s, "journal-1011: cn->bh is NULL\n") ; 13751da177e4SLinus Torvalds } 13761da177e4SLinus Torvalds wait_on_buffer(cn->bh) ; 13771da177e4SLinus Torvalds if (!cn->bh) { 13781da177e4SLinus Torvalds reiserfs_panic(s, "journal-1012: cn->bh is NULL\n") ; 13791da177e4SLinus Torvalds } 13801da177e4SLinus Torvalds if (unlikely (!buffer_uptodate(cn->bh))) { 13811da177e4SLinus Torvalds #ifdef CONFIG_REISERFS_CHECK 13821da177e4SLinus Torvalds reiserfs_warning(s, "journal-949: buffer write failed\n") ; 13831da177e4SLinus Torvalds #endif 13841da177e4SLinus Torvalds err = -EIO; 13851da177e4SLinus Torvalds } 13861da177e4SLinus Torvalds /* note, we must clear the JDirty_wait bit after the up to date 13871da177e4SLinus Torvalds ** check, otherwise we race against our flushpage routine 13881da177e4SLinus Torvalds */ 13891da177e4SLinus Torvalds BUG_ON (!test_clear_buffer_journal_dirty (cn->bh)); 13901da177e4SLinus Torvalds 13911da177e4SLinus Torvalds /* undo the inc from journal_mark_dirty */ 13921da177e4SLinus Torvalds put_bh(cn->bh) ; 13931da177e4SLinus Torvalds brelse(cn->bh) ; 13941da177e4SLinus Torvalds } 13951da177e4SLinus Torvalds cn = cn->next ; 13961da177e4SLinus Torvalds } 13971da177e4SLinus Torvalds } 13981da177e4SLinus Torvalds 13991da177e4SLinus Torvalds if (err) 14001da177e4SLinus Torvalds reiserfs_abort (s, -EIO, "Write error while pushing transaction to disk in %s", __FUNCTION__); 14011da177e4SLinus Torvalds flush_older_and_return: 14021da177e4SLinus Torvalds 14031da177e4SLinus Torvalds 14041da177e4SLinus Torvalds /* before we can update the journal header block, we _must_ flush all 14051da177e4SLinus Torvalds ** real blocks from all older transactions to disk. This is because 14061da177e4SLinus Torvalds ** once the header block is updated, this transaction will not be 14071da177e4SLinus Torvalds ** replayed after a crash 14081da177e4SLinus Torvalds */ 14091da177e4SLinus Torvalds if (flushall) { 14101da177e4SLinus Torvalds flush_older_journal_lists(s, jl); 14111da177e4SLinus Torvalds } 14121da177e4SLinus Torvalds 14131da177e4SLinus Torvalds err = journal->j_errno; 14141da177e4SLinus Torvalds /* before we can remove everything from the hash tables for this 14151da177e4SLinus Torvalds ** transaction, we must make sure it can never be replayed 14161da177e4SLinus Torvalds ** 14171da177e4SLinus Torvalds ** since we are only called from do_journal_end, we know for sure there 14181da177e4SLinus Torvalds ** are no allocations going on while we are flushing journal lists. So, 14191da177e4SLinus Torvalds ** we only need to update the journal header block for the last list 14201da177e4SLinus Torvalds ** being flushed 14211da177e4SLinus Torvalds */ 14221da177e4SLinus Torvalds if (!err && flushall) { 14231da177e4SLinus Torvalds err = update_journal_header_block(s, (jl->j_start + jl->j_len + 2) % SB_ONDISK_JOURNAL_SIZE(s), jl->j_trans_id) ; 14241da177e4SLinus Torvalds if (err) 14251da177e4SLinus Torvalds reiserfs_abort (s, -EIO, "Write error while updating journal header in %s", __FUNCTION__); 14261da177e4SLinus Torvalds } 14271da177e4SLinus Torvalds remove_all_from_journal_list(s, jl, 0) ; 14281da177e4SLinus Torvalds list_del_init(&jl->j_list); 14291da177e4SLinus Torvalds journal->j_num_lists--; 14301da177e4SLinus Torvalds del_from_work_list(s, jl); 14311da177e4SLinus Torvalds 14321da177e4SLinus Torvalds if (journal->j_last_flush_id != 0 && 14331da177e4SLinus Torvalds (jl->j_trans_id - journal->j_last_flush_id) != 1) { 14341da177e4SLinus Torvalds reiserfs_warning(s, "clm-2201: last flush %lu, current %lu", 14351da177e4SLinus Torvalds journal->j_last_flush_id, 14361da177e4SLinus Torvalds jl->j_trans_id); 14371da177e4SLinus Torvalds } 14381da177e4SLinus Torvalds journal->j_last_flush_id = jl->j_trans_id; 14391da177e4SLinus Torvalds 14401da177e4SLinus Torvalds /* not strictly required since we are freeing the list, but it should 14411da177e4SLinus Torvalds * help find code using dead lists later on 14421da177e4SLinus Torvalds */ 14431da177e4SLinus Torvalds jl->j_len = 0 ; 14441da177e4SLinus Torvalds atomic_set(&(jl->j_nonzerolen), 0) ; 14451da177e4SLinus Torvalds jl->j_start = 0 ; 14461da177e4SLinus Torvalds jl->j_realblock = NULL ; 14471da177e4SLinus Torvalds jl->j_commit_bh = NULL ; 14481da177e4SLinus Torvalds jl->j_trans_id = 0 ; 14491da177e4SLinus Torvalds jl->j_state = 0; 14501da177e4SLinus Torvalds put_journal_list(s, jl); 14511da177e4SLinus Torvalds if (flushall) 14521da177e4SLinus Torvalds up(&journal->j_flush_sem); 14531da177e4SLinus Torvalds return err ; 14541da177e4SLinus Torvalds } 14551da177e4SLinus Torvalds 14561da177e4SLinus Torvalds static int write_one_transaction(struct super_block *s, 14571da177e4SLinus Torvalds struct reiserfs_journal_list *jl, 14581da177e4SLinus Torvalds struct buffer_chunk *chunk) 14591da177e4SLinus Torvalds { 14601da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 14611da177e4SLinus Torvalds int ret = 0 ; 14621da177e4SLinus Torvalds 14631da177e4SLinus Torvalds jl->j_state |= LIST_TOUCHED; 14641da177e4SLinus Torvalds del_from_work_list(s, jl); 14651da177e4SLinus Torvalds if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) { 14661da177e4SLinus Torvalds return 0; 14671da177e4SLinus Torvalds } 14681da177e4SLinus Torvalds 14691da177e4SLinus Torvalds cn = jl->j_realblock ; 14701da177e4SLinus Torvalds while(cn) { 14711da177e4SLinus Torvalds /* if the blocknr == 0, this has been cleared from the hash, 14721da177e4SLinus Torvalds ** skip it 14731da177e4SLinus Torvalds */ 14741da177e4SLinus Torvalds if (cn->blocknr == 0) { 14751da177e4SLinus Torvalds goto next ; 14761da177e4SLinus Torvalds } 14771da177e4SLinus Torvalds if (cn->bh && can_dirty(cn) && buffer_dirty(cn->bh)) { 14781da177e4SLinus Torvalds struct buffer_head *tmp_bh; 14791da177e4SLinus Torvalds /* we can race against journal_mark_freed when we try 14801da177e4SLinus Torvalds * to lock_buffer(cn->bh), so we have to inc the buffer 14811da177e4SLinus Torvalds * count, and recheck things after locking 14821da177e4SLinus Torvalds */ 14831da177e4SLinus Torvalds tmp_bh = cn->bh; 14841da177e4SLinus Torvalds get_bh(tmp_bh); 14851da177e4SLinus Torvalds lock_buffer(tmp_bh); 14861da177e4SLinus Torvalds if (cn->bh && can_dirty(cn) && buffer_dirty(tmp_bh)) { 14871da177e4SLinus Torvalds if (!buffer_journal_dirty(tmp_bh) || 14881da177e4SLinus Torvalds buffer_journal_prepared(tmp_bh)) 14891da177e4SLinus Torvalds BUG(); 14901da177e4SLinus Torvalds add_to_chunk(chunk, tmp_bh, NULL, write_chunk); 14911da177e4SLinus Torvalds ret++; 14921da177e4SLinus Torvalds } else { 14931da177e4SLinus Torvalds /* note, cn->bh might be null now */ 14941da177e4SLinus Torvalds unlock_buffer(tmp_bh); 14951da177e4SLinus Torvalds } 14961da177e4SLinus Torvalds put_bh(tmp_bh); 14971da177e4SLinus Torvalds } 14981da177e4SLinus Torvalds next: 14991da177e4SLinus Torvalds cn = cn->next ; 15001da177e4SLinus Torvalds cond_resched(); 15011da177e4SLinus Torvalds } 15021da177e4SLinus Torvalds return ret ; 15031da177e4SLinus Torvalds } 15041da177e4SLinus Torvalds 15051da177e4SLinus Torvalds /* used by flush_commit_list */ 15061da177e4SLinus Torvalds static int dirty_one_transaction(struct super_block *s, 15071da177e4SLinus Torvalds struct reiserfs_journal_list *jl) 15081da177e4SLinus Torvalds { 15091da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 15101da177e4SLinus Torvalds struct reiserfs_journal_list *pjl; 15111da177e4SLinus Torvalds int ret = 0 ; 15121da177e4SLinus Torvalds 15131da177e4SLinus Torvalds jl->j_state |= LIST_DIRTY; 15141da177e4SLinus Torvalds cn = jl->j_realblock ; 15151da177e4SLinus Torvalds while(cn) { 15161da177e4SLinus Torvalds /* look for a more recent transaction that logged this 15171da177e4SLinus Torvalds ** buffer. Only the most recent transaction with a buffer in 15181da177e4SLinus Torvalds ** it is allowed to send that buffer to disk 15191da177e4SLinus Torvalds */ 15201da177e4SLinus Torvalds pjl = find_newer_jl_for_cn(cn) ; 15211da177e4SLinus Torvalds if (!pjl && cn->blocknr && cn->bh && buffer_journal_dirty(cn->bh)) 15221da177e4SLinus Torvalds { 15231da177e4SLinus Torvalds BUG_ON (!can_dirty(cn)); 15241da177e4SLinus Torvalds /* if the buffer is prepared, it will either be logged 15251da177e4SLinus Torvalds * or restored. If restored, we need to make sure 15261da177e4SLinus Torvalds * it actually gets marked dirty 15271da177e4SLinus Torvalds */ 15281da177e4SLinus Torvalds clear_buffer_journal_new (cn->bh); 15291da177e4SLinus Torvalds if (buffer_journal_prepared (cn->bh)) { 15301da177e4SLinus Torvalds set_buffer_journal_restore_dirty (cn->bh); 15311da177e4SLinus Torvalds } else { 15321da177e4SLinus Torvalds set_buffer_journal_test (cn->bh); 15331da177e4SLinus Torvalds mark_buffer_dirty(cn->bh); 15341da177e4SLinus Torvalds } 15351da177e4SLinus Torvalds } 15361da177e4SLinus Torvalds cn = cn->next ; 15371da177e4SLinus Torvalds } 15381da177e4SLinus Torvalds return ret ; 15391da177e4SLinus Torvalds } 15401da177e4SLinus Torvalds 15411da177e4SLinus Torvalds static int kupdate_transactions(struct super_block *s, 15421da177e4SLinus Torvalds struct reiserfs_journal_list *jl, 15431da177e4SLinus Torvalds struct reiserfs_journal_list **next_jl, 15441da177e4SLinus Torvalds unsigned long *next_trans_id, 15451da177e4SLinus Torvalds int num_blocks, 15461da177e4SLinus Torvalds int num_trans) { 15471da177e4SLinus Torvalds int ret = 0; 15481da177e4SLinus Torvalds int written = 0 ; 15491da177e4SLinus Torvalds int transactions_flushed = 0; 15501da177e4SLinus Torvalds unsigned long orig_trans_id = jl->j_trans_id; 15511da177e4SLinus Torvalds struct buffer_chunk chunk; 15521da177e4SLinus Torvalds struct list_head *entry; 15531da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (s); 15541da177e4SLinus Torvalds chunk.nr = 0; 15551da177e4SLinus Torvalds 15561da177e4SLinus Torvalds down(&journal->j_flush_sem); 15571da177e4SLinus Torvalds if (!journal_list_still_alive(s, orig_trans_id)) { 15581da177e4SLinus Torvalds goto done; 15591da177e4SLinus Torvalds } 15601da177e4SLinus Torvalds 15611da177e4SLinus Torvalds /* we've got j_flush_sem held, nobody is going to delete any 15621da177e4SLinus Torvalds * of these lists out from underneath us 15631da177e4SLinus Torvalds */ 15641da177e4SLinus Torvalds while((num_trans && transactions_flushed < num_trans) || 15651da177e4SLinus Torvalds (!num_trans && written < num_blocks)) { 15661da177e4SLinus Torvalds 15671da177e4SLinus Torvalds if (jl->j_len == 0 || (jl->j_state & LIST_TOUCHED) || 15681da177e4SLinus Torvalds atomic_read(&jl->j_commit_left) || !(jl->j_state & LIST_DIRTY)) 15691da177e4SLinus Torvalds { 15701da177e4SLinus Torvalds del_from_work_list(s, jl); 15711da177e4SLinus Torvalds break; 15721da177e4SLinus Torvalds } 15731da177e4SLinus Torvalds ret = write_one_transaction(s, jl, &chunk); 15741da177e4SLinus Torvalds 15751da177e4SLinus Torvalds if (ret < 0) 15761da177e4SLinus Torvalds goto done; 15771da177e4SLinus Torvalds transactions_flushed++; 15781da177e4SLinus Torvalds written += ret; 15791da177e4SLinus Torvalds entry = jl->j_list.next; 15801da177e4SLinus Torvalds 15811da177e4SLinus Torvalds /* did we wrap? */ 15821da177e4SLinus Torvalds if (entry == &journal->j_journal_list) { 15831da177e4SLinus Torvalds break; 15841da177e4SLinus Torvalds } 15851da177e4SLinus Torvalds jl = JOURNAL_LIST_ENTRY(entry); 15861da177e4SLinus Torvalds 15871da177e4SLinus Torvalds /* don't bother with older transactions */ 15881da177e4SLinus Torvalds if (jl->j_trans_id <= orig_trans_id) 15891da177e4SLinus Torvalds break; 15901da177e4SLinus Torvalds } 15911da177e4SLinus Torvalds if (chunk.nr) { 15921da177e4SLinus Torvalds write_chunk(&chunk); 15931da177e4SLinus Torvalds } 15941da177e4SLinus Torvalds 15951da177e4SLinus Torvalds done: 15961da177e4SLinus Torvalds up(&journal->j_flush_sem); 15971da177e4SLinus Torvalds return ret; 15981da177e4SLinus Torvalds } 15991da177e4SLinus Torvalds 16001da177e4SLinus Torvalds /* for o_sync and fsync heavy applications, they tend to use 16011da177e4SLinus Torvalds ** all the journa list slots with tiny transactions. These 16021da177e4SLinus Torvalds ** trigger lots and lots of calls to update the header block, which 16031da177e4SLinus Torvalds ** adds seeks and slows things down. 16041da177e4SLinus Torvalds ** 16051da177e4SLinus Torvalds ** This function tries to clear out a large chunk of the journal lists 16061da177e4SLinus Torvalds ** at once, which makes everything faster since only the newest journal 16071da177e4SLinus Torvalds ** list updates the header block 16081da177e4SLinus Torvalds */ 16091da177e4SLinus Torvalds static int flush_used_journal_lists(struct super_block *s, 16101da177e4SLinus Torvalds struct reiserfs_journal_list *jl) { 16111da177e4SLinus Torvalds unsigned long len = 0; 16121da177e4SLinus Torvalds unsigned long cur_len; 16131da177e4SLinus Torvalds int ret; 16141da177e4SLinus Torvalds int i; 16151da177e4SLinus Torvalds int limit = 256; 16161da177e4SLinus Torvalds struct reiserfs_journal_list *tjl; 16171da177e4SLinus Torvalds struct reiserfs_journal_list *flush_jl; 16181da177e4SLinus Torvalds unsigned long trans_id; 16191da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (s); 16201da177e4SLinus Torvalds 16211da177e4SLinus Torvalds flush_jl = tjl = jl; 16221da177e4SLinus Torvalds 16231da177e4SLinus Torvalds /* in data logging mode, try harder to flush a lot of blocks */ 16241da177e4SLinus Torvalds if (reiserfs_data_log(s)) 16251da177e4SLinus Torvalds limit = 1024; 16261da177e4SLinus Torvalds /* flush for 256 transactions or limit blocks, whichever comes first */ 16271da177e4SLinus Torvalds for(i = 0 ; i < 256 && len < limit ; i++) { 16281da177e4SLinus Torvalds if (atomic_read(&tjl->j_commit_left) || 16291da177e4SLinus Torvalds tjl->j_trans_id < jl->j_trans_id) { 16301da177e4SLinus Torvalds break; 16311da177e4SLinus Torvalds } 16321da177e4SLinus Torvalds cur_len = atomic_read(&tjl->j_nonzerolen); 16331da177e4SLinus Torvalds if (cur_len > 0) { 16341da177e4SLinus Torvalds tjl->j_state &= ~LIST_TOUCHED; 16351da177e4SLinus Torvalds } 16361da177e4SLinus Torvalds len += cur_len; 16371da177e4SLinus Torvalds flush_jl = tjl; 16381da177e4SLinus Torvalds if (tjl->j_list.next == &journal->j_journal_list) 16391da177e4SLinus Torvalds break; 16401da177e4SLinus Torvalds tjl = JOURNAL_LIST_ENTRY(tjl->j_list.next); 16411da177e4SLinus Torvalds } 16421da177e4SLinus Torvalds /* try to find a group of blocks we can flush across all the 16431da177e4SLinus Torvalds ** transactions, but only bother if we've actually spanned 16441da177e4SLinus Torvalds ** across multiple lists 16451da177e4SLinus Torvalds */ 16461da177e4SLinus Torvalds if (flush_jl != jl) { 16471da177e4SLinus Torvalds ret = kupdate_transactions(s, jl, &tjl, &trans_id, len, i); 16481da177e4SLinus Torvalds } 16491da177e4SLinus Torvalds flush_journal_list(s, flush_jl, 1); 16501da177e4SLinus Torvalds return 0; 16511da177e4SLinus Torvalds } 16521da177e4SLinus Torvalds 16531da177e4SLinus Torvalds /* 16541da177e4SLinus Torvalds ** removes any nodes in table with name block and dev as bh. 16551da177e4SLinus Torvalds ** only touchs the hnext and hprev pointers. 16561da177e4SLinus Torvalds */ 16571da177e4SLinus Torvalds void remove_journal_hash(struct super_block *sb, 16581da177e4SLinus Torvalds struct reiserfs_journal_cnode **table, 16591da177e4SLinus Torvalds struct reiserfs_journal_list *jl, 16601da177e4SLinus Torvalds unsigned long block, int remove_freed) 16611da177e4SLinus Torvalds { 16621da177e4SLinus Torvalds struct reiserfs_journal_cnode *cur ; 16631da177e4SLinus Torvalds struct reiserfs_journal_cnode **head ; 16641da177e4SLinus Torvalds 16651da177e4SLinus Torvalds head= &(journal_hash(table, sb, block)) ; 16661da177e4SLinus Torvalds if (!head) { 16671da177e4SLinus Torvalds return ; 16681da177e4SLinus Torvalds } 16691da177e4SLinus Torvalds cur = *head ; 16701da177e4SLinus Torvalds while(cur) { 16711da177e4SLinus Torvalds if (cur->blocknr == block && cur->sb == sb && (jl == NULL || jl == cur->jlist) && 16721da177e4SLinus Torvalds (!test_bit(BLOCK_FREED, &cur->state) || remove_freed)) { 16731da177e4SLinus Torvalds if (cur->hnext) { 16741da177e4SLinus Torvalds cur->hnext->hprev = cur->hprev ; 16751da177e4SLinus Torvalds } 16761da177e4SLinus Torvalds if (cur->hprev) { 16771da177e4SLinus Torvalds cur->hprev->hnext = cur->hnext ; 16781da177e4SLinus Torvalds } else { 16791da177e4SLinus Torvalds *head = cur->hnext ; 16801da177e4SLinus Torvalds } 16811da177e4SLinus Torvalds cur->blocknr = 0 ; 16821da177e4SLinus Torvalds cur->sb = NULL ; 16831da177e4SLinus Torvalds cur->state = 0 ; 16841da177e4SLinus Torvalds if (cur->bh && cur->jlist) /* anybody who clears the cur->bh will also dec the nonzerolen */ 16851da177e4SLinus Torvalds atomic_dec(&(cur->jlist->j_nonzerolen)) ; 16861da177e4SLinus Torvalds cur->bh = NULL ; 16871da177e4SLinus Torvalds cur->jlist = NULL ; 16881da177e4SLinus Torvalds } 16891da177e4SLinus Torvalds cur = cur->hnext ; 16901da177e4SLinus Torvalds } 16911da177e4SLinus Torvalds } 16921da177e4SLinus Torvalds 16931da177e4SLinus Torvalds static void free_journal_ram(struct super_block *p_s_sb) { 16941da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); 16951da177e4SLinus Torvalds reiserfs_kfree(journal->j_current_jl, 16961da177e4SLinus Torvalds sizeof(struct reiserfs_journal_list), p_s_sb); 16971da177e4SLinus Torvalds journal->j_num_lists--; 16981da177e4SLinus Torvalds 16991da177e4SLinus Torvalds vfree(journal->j_cnode_free_orig) ; 17001da177e4SLinus Torvalds free_list_bitmaps(p_s_sb, journal->j_list_bitmap) ; 17011da177e4SLinus Torvalds free_bitmap_nodes(p_s_sb) ; /* must be after free_list_bitmaps */ 17021da177e4SLinus Torvalds if (journal->j_header_bh) { 17031da177e4SLinus Torvalds brelse(journal->j_header_bh) ; 17041da177e4SLinus Torvalds } 17051da177e4SLinus Torvalds /* j_header_bh is on the journal dev, make sure not to release the journal 17061da177e4SLinus Torvalds * dev until we brelse j_header_bh 17071da177e4SLinus Torvalds */ 17081da177e4SLinus Torvalds release_journal_dev(p_s_sb, journal); 17091da177e4SLinus Torvalds vfree(journal) ; 17101da177e4SLinus Torvalds } 17111da177e4SLinus Torvalds 17121da177e4SLinus Torvalds /* 17131da177e4SLinus Torvalds ** call on unmount. Only set error to 1 if you haven't made your way out 17141da177e4SLinus Torvalds ** of read_super() yet. Any other caller must keep error at 0. 17151da177e4SLinus Torvalds */ 17161da177e4SLinus Torvalds static int do_journal_release(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, int error) { 17171da177e4SLinus Torvalds struct reiserfs_transaction_handle myth ; 17181da177e4SLinus Torvalds int flushed = 0; 17191da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); 17201da177e4SLinus Torvalds 17211da177e4SLinus Torvalds /* we only want to flush out transactions if we were called with error == 0 17221da177e4SLinus Torvalds */ 17231da177e4SLinus Torvalds if (!error && !(p_s_sb->s_flags & MS_RDONLY)) { 17241da177e4SLinus Torvalds /* end the current trans */ 17251da177e4SLinus Torvalds BUG_ON (!th->t_trans_id); 17261da177e4SLinus Torvalds do_journal_end(th, p_s_sb,10, FLUSH_ALL) ; 17271da177e4SLinus Torvalds 17281da177e4SLinus Torvalds /* make sure something gets logged to force our way into the flush code */ 17291da177e4SLinus Torvalds if (!journal_join(&myth, p_s_sb, 1)) { 17301da177e4SLinus Torvalds reiserfs_prepare_for_journal(p_s_sb, SB_BUFFER_WITH_SB(p_s_sb), 1) ; 17311da177e4SLinus Torvalds journal_mark_dirty(&myth, p_s_sb, SB_BUFFER_WITH_SB(p_s_sb)) ; 17321da177e4SLinus Torvalds do_journal_end(&myth, p_s_sb,1, FLUSH_ALL) ; 17331da177e4SLinus Torvalds flushed = 1; 17341da177e4SLinus Torvalds } 17351da177e4SLinus Torvalds } 17361da177e4SLinus Torvalds 17371da177e4SLinus Torvalds /* this also catches errors during the do_journal_end above */ 17381da177e4SLinus Torvalds if (!error && reiserfs_is_journal_aborted(journal)) { 17391da177e4SLinus Torvalds memset(&myth, 0, sizeof(myth)); 17401da177e4SLinus Torvalds if (!journal_join_abort(&myth, p_s_sb, 1)) { 17411da177e4SLinus Torvalds reiserfs_prepare_for_journal(p_s_sb, SB_BUFFER_WITH_SB(p_s_sb), 1) ; 17421da177e4SLinus Torvalds journal_mark_dirty(&myth, p_s_sb, SB_BUFFER_WITH_SB(p_s_sb)) ; 17431da177e4SLinus Torvalds do_journal_end(&myth, p_s_sb, 1, FLUSH_ALL) ; 17441da177e4SLinus Torvalds } 17451da177e4SLinus Torvalds } 17461da177e4SLinus Torvalds 17471da177e4SLinus Torvalds reiserfs_mounted_fs_count-- ; 17481da177e4SLinus Torvalds /* wait for all commits to finish */ 17491da177e4SLinus Torvalds cancel_delayed_work(&SB_JOURNAL(p_s_sb)->j_work); 17501da177e4SLinus Torvalds flush_workqueue(commit_wq); 17511da177e4SLinus Torvalds if (!reiserfs_mounted_fs_count) { 17521da177e4SLinus Torvalds destroy_workqueue(commit_wq); 17531da177e4SLinus Torvalds commit_wq = NULL; 17541da177e4SLinus Torvalds } 17551da177e4SLinus Torvalds 17561da177e4SLinus Torvalds free_journal_ram(p_s_sb) ; 17571da177e4SLinus Torvalds 17581da177e4SLinus Torvalds return 0 ; 17591da177e4SLinus Torvalds } 17601da177e4SLinus Torvalds 17611da177e4SLinus Torvalds /* 17621da177e4SLinus Torvalds ** call on unmount. flush all journal trans, release all alloc'd ram 17631da177e4SLinus Torvalds */ 17641da177e4SLinus Torvalds int journal_release(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb) { 17651da177e4SLinus Torvalds return do_journal_release(th, p_s_sb, 0) ; 17661da177e4SLinus Torvalds } 17671da177e4SLinus Torvalds /* 17681da177e4SLinus Torvalds ** only call from an error condition inside reiserfs_read_super! 17691da177e4SLinus Torvalds */ 17701da177e4SLinus Torvalds int journal_release_error(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb) { 17711da177e4SLinus Torvalds return do_journal_release(th, p_s_sb, 1) ; 17721da177e4SLinus Torvalds } 17731da177e4SLinus Torvalds 17741da177e4SLinus Torvalds /* compares description block with commit block. returns 1 if they differ, 0 if they are the same */ 17751da177e4SLinus Torvalds static int journal_compare_desc_commit(struct super_block *p_s_sb, struct reiserfs_journal_desc *desc, 17761da177e4SLinus Torvalds struct reiserfs_journal_commit *commit) { 17771da177e4SLinus Torvalds if (get_commit_trans_id (commit) != get_desc_trans_id (desc) || 17781da177e4SLinus Torvalds get_commit_trans_len (commit) != get_desc_trans_len (desc) || 17791da177e4SLinus Torvalds get_commit_trans_len (commit) > SB_JOURNAL(p_s_sb)->j_trans_max || 17801da177e4SLinus Torvalds get_commit_trans_len (commit) <= 0 17811da177e4SLinus Torvalds ) { 17821da177e4SLinus Torvalds return 1 ; 17831da177e4SLinus Torvalds } 17841da177e4SLinus Torvalds return 0 ; 17851da177e4SLinus Torvalds } 17861da177e4SLinus Torvalds /* returns 0 if it did not find a description block 17871da177e4SLinus Torvalds ** returns -1 if it found a corrupt commit block 17881da177e4SLinus Torvalds ** returns 1 if both desc and commit were valid 17891da177e4SLinus Torvalds */ 17901da177e4SLinus Torvalds static int journal_transaction_is_valid(struct super_block *p_s_sb, struct buffer_head *d_bh, unsigned long *oldest_invalid_trans_id, unsigned long *newest_mount_id) { 17911da177e4SLinus Torvalds struct reiserfs_journal_desc *desc ; 17921da177e4SLinus Torvalds struct reiserfs_journal_commit *commit ; 17931da177e4SLinus Torvalds struct buffer_head *c_bh ; 17941da177e4SLinus Torvalds unsigned long offset ; 17951da177e4SLinus Torvalds 17961da177e4SLinus Torvalds if (!d_bh) 17971da177e4SLinus Torvalds return 0 ; 17981da177e4SLinus Torvalds 17991da177e4SLinus Torvalds desc = (struct reiserfs_journal_desc *)d_bh->b_data ; 18001da177e4SLinus Torvalds if (get_desc_trans_len(desc) > 0 && !memcmp(get_journal_desc_magic (d_bh), JOURNAL_DESC_MAGIC, 8)) { 18011da177e4SLinus Torvalds if (oldest_invalid_trans_id && *oldest_invalid_trans_id && get_desc_trans_id(desc) > *oldest_invalid_trans_id) { 18021da177e4SLinus Torvalds reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-986: transaction " 18031da177e4SLinus Torvalds "is valid returning because trans_id %d is greater than " 18041da177e4SLinus Torvalds "oldest_invalid %lu", get_desc_trans_id(desc), 18051da177e4SLinus Torvalds *oldest_invalid_trans_id); 18061da177e4SLinus Torvalds return 0 ; 18071da177e4SLinus Torvalds } 18081da177e4SLinus Torvalds if (newest_mount_id && *newest_mount_id > get_desc_mount_id (desc)) { 18091da177e4SLinus Torvalds reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1087: transaction " 18101da177e4SLinus Torvalds "is valid returning because mount_id %d is less than " 18111da177e4SLinus Torvalds "newest_mount_id %lu", get_desc_mount_id (desc), 18121da177e4SLinus Torvalds *newest_mount_id) ; 18131da177e4SLinus Torvalds return -1 ; 18141da177e4SLinus Torvalds } 18151da177e4SLinus Torvalds if ( get_desc_trans_len(desc) > SB_JOURNAL(p_s_sb)->j_trans_max ) { 18161da177e4SLinus Torvalds reiserfs_warning(p_s_sb, "journal-2018: Bad transaction length %d encountered, ignoring transaction", get_desc_trans_len(desc)); 18171da177e4SLinus Torvalds return -1 ; 18181da177e4SLinus Torvalds } 18191da177e4SLinus Torvalds offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) ; 18201da177e4SLinus Torvalds 18211da177e4SLinus Torvalds /* ok, we have a journal description block, lets see if the transaction was valid */ 18221da177e4SLinus Torvalds c_bh = journal_bread(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + 18231da177e4SLinus Torvalds ((offset + get_desc_trans_len(desc) + 1) % SB_ONDISK_JOURNAL_SIZE(p_s_sb))) ; 18241da177e4SLinus Torvalds if (!c_bh) 18251da177e4SLinus Torvalds return 0 ; 18261da177e4SLinus Torvalds commit = (struct reiserfs_journal_commit *)c_bh->b_data ; 18271da177e4SLinus Torvalds if (journal_compare_desc_commit(p_s_sb, desc, commit)) { 18281da177e4SLinus Torvalds reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, 18291da177e4SLinus Torvalds "journal_transaction_is_valid, commit offset %ld had bad " 18301da177e4SLinus Torvalds "time %d or length %d", 18311da177e4SLinus Torvalds c_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), 18321da177e4SLinus Torvalds get_commit_trans_id (commit), 18331da177e4SLinus Torvalds get_commit_trans_len(commit)); 18341da177e4SLinus Torvalds brelse(c_bh) ; 18351da177e4SLinus Torvalds if (oldest_invalid_trans_id) { 18361da177e4SLinus Torvalds *oldest_invalid_trans_id = get_desc_trans_id(desc) ; 18371da177e4SLinus Torvalds reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1004: " 18381da177e4SLinus Torvalds "transaction_is_valid setting oldest invalid trans_id " 18391da177e4SLinus Torvalds "to %d", get_desc_trans_id(desc)) ; 18401da177e4SLinus Torvalds } 18411da177e4SLinus Torvalds return -1; 18421da177e4SLinus Torvalds } 18431da177e4SLinus Torvalds brelse(c_bh) ; 18441da177e4SLinus Torvalds reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1006: found valid " 18451da177e4SLinus Torvalds "transaction start offset %llu, len %d id %d", 18461da177e4SLinus Torvalds d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), 18471da177e4SLinus Torvalds get_desc_trans_len(desc), get_desc_trans_id(desc)) ; 18481da177e4SLinus Torvalds return 1 ; 18491da177e4SLinus Torvalds } else { 18501da177e4SLinus Torvalds return 0 ; 18511da177e4SLinus Torvalds } 18521da177e4SLinus Torvalds } 18531da177e4SLinus Torvalds 18541da177e4SLinus Torvalds static void brelse_array(struct buffer_head **heads, int num) { 18551da177e4SLinus Torvalds int i ; 18561da177e4SLinus Torvalds for (i = 0 ; i < num ; i++) { 18571da177e4SLinus Torvalds brelse(heads[i]) ; 18581da177e4SLinus Torvalds } 18591da177e4SLinus Torvalds } 18601da177e4SLinus Torvalds 18611da177e4SLinus Torvalds /* 18621da177e4SLinus Torvalds ** given the start, and values for the oldest acceptable transactions, 18631da177e4SLinus Torvalds ** this either reads in a replays a transaction, or returns because the transaction 18641da177e4SLinus Torvalds ** is invalid, or too old. 18651da177e4SLinus Torvalds */ 18661da177e4SLinus Torvalds static int journal_read_transaction(struct super_block *p_s_sb, unsigned long cur_dblock, unsigned long oldest_start, 18671da177e4SLinus Torvalds unsigned long oldest_trans_id, unsigned long newest_mount_id) { 18681da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 18691da177e4SLinus Torvalds struct reiserfs_journal_desc *desc ; 18701da177e4SLinus Torvalds struct reiserfs_journal_commit *commit ; 18711da177e4SLinus Torvalds unsigned long trans_id = 0 ; 18721da177e4SLinus Torvalds struct buffer_head *c_bh ; 18731da177e4SLinus Torvalds struct buffer_head *d_bh ; 18741da177e4SLinus Torvalds struct buffer_head **log_blocks = NULL ; 18751da177e4SLinus Torvalds struct buffer_head **real_blocks = NULL ; 18761da177e4SLinus Torvalds unsigned long trans_offset ; 18771da177e4SLinus Torvalds int i; 18781da177e4SLinus Torvalds int trans_half; 18791da177e4SLinus Torvalds 18801da177e4SLinus Torvalds d_bh = journal_bread(p_s_sb, cur_dblock) ; 18811da177e4SLinus Torvalds if (!d_bh) 18821da177e4SLinus Torvalds return 1 ; 18831da177e4SLinus Torvalds desc = (struct reiserfs_journal_desc *)d_bh->b_data ; 18841da177e4SLinus Torvalds trans_offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) ; 18851da177e4SLinus Torvalds reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1037: " 18861da177e4SLinus Torvalds "journal_read_transaction, offset %llu, len %d mount_id %d", 18871da177e4SLinus Torvalds d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), 18881da177e4SLinus Torvalds get_desc_trans_len(desc), get_desc_mount_id(desc)) ; 18891da177e4SLinus Torvalds if (get_desc_trans_id(desc) < oldest_trans_id) { 18901da177e4SLinus Torvalds reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1039: " 18911da177e4SLinus Torvalds "journal_read_trans skipping because %lu is too old", 18921da177e4SLinus Torvalds cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb)) ; 18931da177e4SLinus Torvalds brelse(d_bh) ; 18941da177e4SLinus Torvalds return 1 ; 18951da177e4SLinus Torvalds } 18961da177e4SLinus Torvalds if (get_desc_mount_id(desc) != newest_mount_id) { 18971da177e4SLinus Torvalds reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1146: " 18981da177e4SLinus Torvalds "journal_read_trans skipping because %d is != " 18991da177e4SLinus Torvalds "newest_mount_id %lu", get_desc_mount_id(desc), 19001da177e4SLinus Torvalds newest_mount_id) ; 19011da177e4SLinus Torvalds brelse(d_bh) ; 19021da177e4SLinus Torvalds return 1 ; 19031da177e4SLinus Torvalds } 19041da177e4SLinus Torvalds c_bh = journal_bread(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + 19051da177e4SLinus Torvalds ((trans_offset + get_desc_trans_len(desc) + 1) % 19061da177e4SLinus Torvalds SB_ONDISK_JOURNAL_SIZE(p_s_sb))) ; 19071da177e4SLinus Torvalds if (!c_bh) { 19081da177e4SLinus Torvalds brelse(d_bh) ; 19091da177e4SLinus Torvalds return 1 ; 19101da177e4SLinus Torvalds } 19111da177e4SLinus Torvalds commit = (struct reiserfs_journal_commit *)c_bh->b_data ; 19121da177e4SLinus Torvalds if (journal_compare_desc_commit(p_s_sb, desc, commit)) { 19131da177e4SLinus Torvalds reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal_read_transaction, " 19141da177e4SLinus Torvalds "commit offset %llu had bad time %d or length %d", 19151da177e4SLinus Torvalds c_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), 19161da177e4SLinus Torvalds get_commit_trans_id(commit), get_commit_trans_len(commit)); 19171da177e4SLinus Torvalds brelse(c_bh) ; 19181da177e4SLinus Torvalds brelse(d_bh) ; 19191da177e4SLinus Torvalds return 1; 19201da177e4SLinus Torvalds } 19211da177e4SLinus Torvalds trans_id = get_desc_trans_id(desc) ; 19221da177e4SLinus Torvalds /* now we know we've got a good transaction, and it was inside the valid time ranges */ 19231da177e4SLinus Torvalds log_blocks = reiserfs_kmalloc(get_desc_trans_len(desc) * sizeof(struct buffer_head *), GFP_NOFS, p_s_sb) ; 19241da177e4SLinus Torvalds real_blocks = reiserfs_kmalloc(get_desc_trans_len(desc) * sizeof(struct buffer_head *), GFP_NOFS, p_s_sb) ; 19251da177e4SLinus Torvalds if (!log_blocks || !real_blocks) { 19261da177e4SLinus Torvalds brelse(c_bh) ; 19271da177e4SLinus Torvalds brelse(d_bh) ; 19281da177e4SLinus Torvalds reiserfs_kfree(log_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ; 19291da177e4SLinus Torvalds reiserfs_kfree(real_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ; 19301da177e4SLinus Torvalds reiserfs_warning(p_s_sb, "journal-1169: kmalloc failed, unable to mount FS") ; 19311da177e4SLinus Torvalds return -1 ; 19321da177e4SLinus Torvalds } 19331da177e4SLinus Torvalds /* get all the buffer heads */ 19341da177e4SLinus Torvalds trans_half = journal_trans_half (p_s_sb->s_blocksize) ; 19351da177e4SLinus Torvalds for(i = 0 ; i < get_desc_trans_len(desc) ; i++) { 19361da177e4SLinus Torvalds log_blocks[i] = journal_getblk(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + (trans_offset + 1 + i) % SB_ONDISK_JOURNAL_SIZE(p_s_sb)); 19371da177e4SLinus Torvalds if (i < trans_half) { 19381da177e4SLinus Torvalds real_blocks[i] = sb_getblk(p_s_sb, le32_to_cpu(desc->j_realblock[i])) ; 19391da177e4SLinus Torvalds } else { 19401da177e4SLinus Torvalds real_blocks[i] = sb_getblk(p_s_sb, le32_to_cpu(commit->j_realblock[i - trans_half])) ; 19411da177e4SLinus Torvalds } 19421da177e4SLinus Torvalds if ( real_blocks[i]->b_blocknr > SB_BLOCK_COUNT(p_s_sb) ) { 19431da177e4SLinus Torvalds reiserfs_warning(p_s_sb, "journal-1207: REPLAY FAILURE fsck required! Block to replay is outside of filesystem"); 19441da177e4SLinus Torvalds goto abort_replay; 19451da177e4SLinus Torvalds } 19461da177e4SLinus Torvalds /* make sure we don't try to replay onto log or reserved area */ 19471da177e4SLinus Torvalds if (is_block_in_log_or_reserved_area(p_s_sb, real_blocks[i]->b_blocknr)) { 19481da177e4SLinus Torvalds reiserfs_warning(p_s_sb, "journal-1204: REPLAY FAILURE fsck required! Trying to replay onto a log block") ; 19491da177e4SLinus Torvalds abort_replay: 19501da177e4SLinus Torvalds brelse_array(log_blocks, i) ; 19511da177e4SLinus Torvalds brelse_array(real_blocks, i) ; 19521da177e4SLinus Torvalds brelse(c_bh) ; 19531da177e4SLinus Torvalds brelse(d_bh) ; 19541da177e4SLinus Torvalds reiserfs_kfree(log_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ; 19551da177e4SLinus Torvalds reiserfs_kfree(real_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ; 19561da177e4SLinus Torvalds return -1 ; 19571da177e4SLinus Torvalds } 19581da177e4SLinus Torvalds } 19591da177e4SLinus Torvalds /* read in the log blocks, memcpy to the corresponding real block */ 19601da177e4SLinus Torvalds ll_rw_block(READ, get_desc_trans_len(desc), log_blocks) ; 19611da177e4SLinus Torvalds for (i = 0 ; i < get_desc_trans_len(desc) ; i++) { 19621da177e4SLinus Torvalds wait_on_buffer(log_blocks[i]) ; 19631da177e4SLinus Torvalds if (!buffer_uptodate(log_blocks[i])) { 19641da177e4SLinus Torvalds reiserfs_warning(p_s_sb, "journal-1212: REPLAY FAILURE fsck required! buffer write failed") ; 19651da177e4SLinus Torvalds brelse_array(log_blocks + i, get_desc_trans_len(desc) - i) ; 19661da177e4SLinus Torvalds brelse_array(real_blocks, get_desc_trans_len(desc)) ; 19671da177e4SLinus Torvalds brelse(c_bh) ; 19681da177e4SLinus Torvalds brelse(d_bh) ; 19691da177e4SLinus Torvalds reiserfs_kfree(log_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ; 19701da177e4SLinus Torvalds reiserfs_kfree(real_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ; 19711da177e4SLinus Torvalds return -1 ; 19721da177e4SLinus Torvalds } 19731da177e4SLinus Torvalds memcpy(real_blocks[i]->b_data, log_blocks[i]->b_data, real_blocks[i]->b_size) ; 19741da177e4SLinus Torvalds set_buffer_uptodate(real_blocks[i]) ; 19751da177e4SLinus Torvalds brelse(log_blocks[i]) ; 19761da177e4SLinus Torvalds } 19771da177e4SLinus Torvalds /* flush out the real blocks */ 19781da177e4SLinus Torvalds for (i = 0 ; i < get_desc_trans_len(desc) ; i++) { 19791da177e4SLinus Torvalds set_buffer_dirty(real_blocks[i]) ; 19801da177e4SLinus Torvalds ll_rw_block(WRITE, 1, real_blocks + i) ; 19811da177e4SLinus Torvalds } 19821da177e4SLinus Torvalds for (i = 0 ; i < get_desc_trans_len(desc) ; i++) { 19831da177e4SLinus Torvalds wait_on_buffer(real_blocks[i]) ; 19841da177e4SLinus Torvalds if (!buffer_uptodate(real_blocks[i])) { 19851da177e4SLinus Torvalds reiserfs_warning(p_s_sb, "journal-1226: REPLAY FAILURE, fsck required! buffer write failed") ; 19861da177e4SLinus Torvalds brelse_array(real_blocks + i, get_desc_trans_len(desc) - i) ; 19871da177e4SLinus Torvalds brelse(c_bh) ; 19881da177e4SLinus Torvalds brelse(d_bh) ; 19891da177e4SLinus Torvalds reiserfs_kfree(log_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ; 19901da177e4SLinus Torvalds reiserfs_kfree(real_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ; 19911da177e4SLinus Torvalds return -1 ; 19921da177e4SLinus Torvalds } 19931da177e4SLinus Torvalds brelse(real_blocks[i]) ; 19941da177e4SLinus Torvalds } 19951da177e4SLinus Torvalds cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + ((trans_offset + get_desc_trans_len(desc) + 2) % SB_ONDISK_JOURNAL_SIZE(p_s_sb)) ; 19961da177e4SLinus Torvalds reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1095: setting journal " 19971da177e4SLinus Torvalds "start to offset %ld", 19981da177e4SLinus Torvalds cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb)) ; 19991da177e4SLinus Torvalds 20001da177e4SLinus Torvalds /* init starting values for the first transaction, in case this is the last transaction to be replayed. */ 20011da177e4SLinus Torvalds journal->j_start = cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) ; 20021da177e4SLinus Torvalds journal->j_last_flush_trans_id = trans_id ; 20031da177e4SLinus Torvalds journal->j_trans_id = trans_id + 1; 20041da177e4SLinus Torvalds brelse(c_bh) ; 20051da177e4SLinus Torvalds brelse(d_bh) ; 20061da177e4SLinus Torvalds reiserfs_kfree(log_blocks, le32_to_cpu(desc->j_len) * sizeof(struct buffer_head *), p_s_sb) ; 20071da177e4SLinus Torvalds reiserfs_kfree(real_blocks, le32_to_cpu(desc->j_len) * sizeof(struct buffer_head *), p_s_sb) ; 20081da177e4SLinus Torvalds return 0 ; 20091da177e4SLinus Torvalds } 20101da177e4SLinus Torvalds 20111da177e4SLinus Torvalds /* This function reads blocks starting from block and to max_block of bufsize 20121da177e4SLinus Torvalds size (but no more than BUFNR blocks at a time). This proved to improve 20131da177e4SLinus Torvalds mounting speed on self-rebuilding raid5 arrays at least. 20141da177e4SLinus Torvalds Right now it is only used from journal code. But later we might use it 20151da177e4SLinus Torvalds from other places. 20161da177e4SLinus Torvalds Note: Do not use journal_getblk/sb_getblk functions here! */ 20171da177e4SLinus Torvalds static struct buffer_head * reiserfs_breada (struct block_device *dev, int block, int bufsize, 20181da177e4SLinus Torvalds unsigned int max_block) 20191da177e4SLinus Torvalds { 20201da177e4SLinus Torvalds struct buffer_head * bhlist[BUFNR]; 20211da177e4SLinus Torvalds unsigned int blocks = BUFNR; 20221da177e4SLinus Torvalds struct buffer_head * bh; 20231da177e4SLinus Torvalds int i, j; 20241da177e4SLinus Torvalds 20251da177e4SLinus Torvalds bh = __getblk (dev, block, bufsize ); 20261da177e4SLinus Torvalds if (buffer_uptodate (bh)) 20271da177e4SLinus Torvalds return (bh); 20281da177e4SLinus Torvalds 20291da177e4SLinus Torvalds if (block + BUFNR > max_block) { 20301da177e4SLinus Torvalds blocks = max_block - block; 20311da177e4SLinus Torvalds } 20321da177e4SLinus Torvalds bhlist[0] = bh; 20331da177e4SLinus Torvalds j = 1; 20341da177e4SLinus Torvalds for (i = 1; i < blocks; i++) { 20351da177e4SLinus Torvalds bh = __getblk (dev, block + i, bufsize); 20361da177e4SLinus Torvalds if (buffer_uptodate (bh)) { 20371da177e4SLinus Torvalds brelse (bh); 20381da177e4SLinus Torvalds break; 20391da177e4SLinus Torvalds } 20401da177e4SLinus Torvalds else bhlist[j++] = bh; 20411da177e4SLinus Torvalds } 20421da177e4SLinus Torvalds ll_rw_block (READ, j, bhlist); 20431da177e4SLinus Torvalds for(i = 1; i < j; i++) 20441da177e4SLinus Torvalds brelse (bhlist[i]); 20451da177e4SLinus Torvalds bh = bhlist[0]; 20461da177e4SLinus Torvalds wait_on_buffer (bh); 20471da177e4SLinus Torvalds if (buffer_uptodate (bh)) 20481da177e4SLinus Torvalds return bh; 20491da177e4SLinus Torvalds brelse (bh); 20501da177e4SLinus Torvalds return NULL; 20511da177e4SLinus Torvalds } 20521da177e4SLinus Torvalds 20531da177e4SLinus Torvalds /* 20541da177e4SLinus Torvalds ** read and replay the log 20551da177e4SLinus Torvalds ** on a clean unmount, the journal header's next unflushed pointer will be to an invalid 20561da177e4SLinus Torvalds ** transaction. This tests that before finding all the transactions in the log, which makes normal mount times fast. 20571da177e4SLinus Torvalds ** 20581da177e4SLinus Torvalds ** After a crash, this starts with the next unflushed transaction, and replays until it finds one too old, or invalid. 20591da177e4SLinus Torvalds ** 20601da177e4SLinus Torvalds ** On exit, it sets things up so the first transaction will work correctly. 20611da177e4SLinus Torvalds */ 20621da177e4SLinus Torvalds static int journal_read(struct super_block *p_s_sb) { 20631da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 20641da177e4SLinus Torvalds struct reiserfs_journal_desc *desc ; 20651da177e4SLinus Torvalds unsigned long oldest_trans_id = 0; 20661da177e4SLinus Torvalds unsigned long oldest_invalid_trans_id = 0 ; 20671da177e4SLinus Torvalds time_t start ; 20681da177e4SLinus Torvalds unsigned long oldest_start = 0; 20691da177e4SLinus Torvalds unsigned long cur_dblock = 0 ; 20701da177e4SLinus Torvalds unsigned long newest_mount_id = 9 ; 20711da177e4SLinus Torvalds struct buffer_head *d_bh ; 20721da177e4SLinus Torvalds struct reiserfs_journal_header *jh ; 20731da177e4SLinus Torvalds int valid_journal_header = 0 ; 20741da177e4SLinus Torvalds int replay_count = 0 ; 20751da177e4SLinus Torvalds int continue_replay = 1 ; 20761da177e4SLinus Torvalds int ret ; 20771da177e4SLinus Torvalds char b[BDEVNAME_SIZE]; 20781da177e4SLinus Torvalds 20791da177e4SLinus Torvalds cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) ; 20801da177e4SLinus Torvalds reiserfs_info (p_s_sb, "checking transaction log (%s)\n", 20811da177e4SLinus Torvalds bdevname(journal->j_dev_bd, b)); 20821da177e4SLinus Torvalds start = get_seconds(); 20831da177e4SLinus Torvalds 20841da177e4SLinus Torvalds /* step 1, read in the journal header block. Check the transaction it says 20851da177e4SLinus Torvalds ** is the first unflushed, and if that transaction is not valid, 20861da177e4SLinus Torvalds ** replay is done 20871da177e4SLinus Torvalds */ 20881da177e4SLinus Torvalds journal->j_header_bh = journal_bread(p_s_sb, 20891da177e4SLinus Torvalds SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + 20901da177e4SLinus Torvalds SB_ONDISK_JOURNAL_SIZE(p_s_sb)); 20911da177e4SLinus Torvalds if (!journal->j_header_bh) { 20921da177e4SLinus Torvalds return 1 ; 20931da177e4SLinus Torvalds } 20941da177e4SLinus Torvalds jh = (struct reiserfs_journal_header *)(journal->j_header_bh->b_data) ; 20951da177e4SLinus Torvalds if (le32_to_cpu(jh->j_first_unflushed_offset) >= 0 && 20961da177e4SLinus Torvalds le32_to_cpu(jh->j_first_unflushed_offset) < SB_ONDISK_JOURNAL_SIZE(p_s_sb) && 20971da177e4SLinus Torvalds le32_to_cpu(jh->j_last_flush_trans_id) > 0) { 20981da177e4SLinus Torvalds oldest_start = SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + 20991da177e4SLinus Torvalds le32_to_cpu(jh->j_first_unflushed_offset) ; 21001da177e4SLinus Torvalds oldest_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) + 1; 21011da177e4SLinus Torvalds newest_mount_id = le32_to_cpu(jh->j_mount_id); 21021da177e4SLinus Torvalds reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1153: found in " 21031da177e4SLinus Torvalds "header: first_unflushed_offset %d, last_flushed_trans_id " 21041da177e4SLinus Torvalds "%lu", le32_to_cpu(jh->j_first_unflushed_offset), 21051da177e4SLinus Torvalds le32_to_cpu(jh->j_last_flush_trans_id)) ; 21061da177e4SLinus Torvalds valid_journal_header = 1 ; 21071da177e4SLinus Torvalds 21081da177e4SLinus Torvalds /* now, we try to read the first unflushed offset. If it is not valid, 21091da177e4SLinus Torvalds ** there is nothing more we can do, and it makes no sense to read 21101da177e4SLinus Torvalds ** through the whole log. 21111da177e4SLinus Torvalds */ 21121da177e4SLinus Torvalds d_bh = journal_bread(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + le32_to_cpu(jh->j_first_unflushed_offset)) ; 21131da177e4SLinus Torvalds ret = journal_transaction_is_valid(p_s_sb, d_bh, NULL, NULL) ; 21141da177e4SLinus Torvalds if (!ret) { 21151da177e4SLinus Torvalds continue_replay = 0 ; 21161da177e4SLinus Torvalds } 21171da177e4SLinus Torvalds brelse(d_bh) ; 21181da177e4SLinus Torvalds goto start_log_replay; 21191da177e4SLinus Torvalds } 21201da177e4SLinus Torvalds 21211da177e4SLinus Torvalds if (continue_replay && bdev_read_only(p_s_sb->s_bdev)) { 21221da177e4SLinus Torvalds reiserfs_warning (p_s_sb, 21231da177e4SLinus Torvalds "clm-2076: device is readonly, unable to replay log") ; 21241da177e4SLinus Torvalds return -1 ; 21251da177e4SLinus Torvalds } 21261da177e4SLinus Torvalds 21271da177e4SLinus Torvalds /* ok, there are transactions that need to be replayed. start with the first log block, find 21281da177e4SLinus Torvalds ** all the valid transactions, and pick out the oldest. 21291da177e4SLinus Torvalds */ 21301da177e4SLinus Torvalds while(continue_replay && cur_dblock < (SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + SB_ONDISK_JOURNAL_SIZE(p_s_sb))) { 21311da177e4SLinus Torvalds /* Note that it is required for blocksize of primary fs device and journal 21321da177e4SLinus Torvalds device to be the same */ 21331da177e4SLinus Torvalds d_bh = reiserfs_breada(journal->j_dev_bd, cur_dblock, p_s_sb->s_blocksize, 21341da177e4SLinus Torvalds SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + SB_ONDISK_JOURNAL_SIZE(p_s_sb)) ; 21351da177e4SLinus Torvalds ret = journal_transaction_is_valid(p_s_sb, d_bh, &oldest_invalid_trans_id, &newest_mount_id) ; 21361da177e4SLinus Torvalds if (ret == 1) { 21371da177e4SLinus Torvalds desc = (struct reiserfs_journal_desc *)d_bh->b_data ; 21381da177e4SLinus Torvalds if (oldest_start == 0) { /* init all oldest_ values */ 21391da177e4SLinus Torvalds oldest_trans_id = get_desc_trans_id(desc) ; 21401da177e4SLinus Torvalds oldest_start = d_bh->b_blocknr ; 21411da177e4SLinus Torvalds newest_mount_id = get_desc_mount_id(desc) ; 21421da177e4SLinus Torvalds reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1179: Setting " 21431da177e4SLinus Torvalds "oldest_start to offset %llu, trans_id %lu", 21441da177e4SLinus Torvalds oldest_start - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), 21451da177e4SLinus Torvalds oldest_trans_id) ; 21461da177e4SLinus Torvalds } else if (oldest_trans_id > get_desc_trans_id(desc)) { 21471da177e4SLinus Torvalds /* one we just read was older */ 21481da177e4SLinus Torvalds oldest_trans_id = get_desc_trans_id(desc) ; 21491da177e4SLinus Torvalds oldest_start = d_bh->b_blocknr ; 21501da177e4SLinus Torvalds reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1180: Resetting " 21511da177e4SLinus Torvalds "oldest_start to offset %lu, trans_id %lu", 21521da177e4SLinus Torvalds oldest_start - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), 21531da177e4SLinus Torvalds oldest_trans_id) ; 21541da177e4SLinus Torvalds } 21551da177e4SLinus Torvalds if (newest_mount_id < get_desc_mount_id(desc)) { 21561da177e4SLinus Torvalds newest_mount_id = get_desc_mount_id(desc) ; 21571da177e4SLinus Torvalds reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1299: Setting " 21581da177e4SLinus Torvalds "newest_mount_id to %d", get_desc_mount_id(desc)); 21591da177e4SLinus Torvalds } 21601da177e4SLinus Torvalds cur_dblock += get_desc_trans_len(desc) + 2 ; 21611da177e4SLinus Torvalds } else { 21621da177e4SLinus Torvalds cur_dblock++ ; 21631da177e4SLinus Torvalds } 21641da177e4SLinus Torvalds brelse(d_bh) ; 21651da177e4SLinus Torvalds } 21661da177e4SLinus Torvalds 21671da177e4SLinus Torvalds start_log_replay: 21681da177e4SLinus Torvalds cur_dblock = oldest_start ; 21691da177e4SLinus Torvalds if (oldest_trans_id) { 21701da177e4SLinus Torvalds reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1206: Starting replay " 21711da177e4SLinus Torvalds "from offset %llu, trans_id %lu", 21721da177e4SLinus Torvalds cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), 21731da177e4SLinus Torvalds oldest_trans_id) ; 21741da177e4SLinus Torvalds 21751da177e4SLinus Torvalds } 21761da177e4SLinus Torvalds replay_count = 0 ; 21771da177e4SLinus Torvalds while(continue_replay && oldest_trans_id > 0) { 21781da177e4SLinus Torvalds ret = journal_read_transaction(p_s_sb, cur_dblock, oldest_start, oldest_trans_id, newest_mount_id) ; 21791da177e4SLinus Torvalds if (ret < 0) { 21801da177e4SLinus Torvalds return ret ; 21811da177e4SLinus Torvalds } else if (ret != 0) { 21821da177e4SLinus Torvalds break ; 21831da177e4SLinus Torvalds } 21841da177e4SLinus Torvalds cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + journal->j_start ; 21851da177e4SLinus Torvalds replay_count++ ; 21861da177e4SLinus Torvalds if (cur_dblock == oldest_start) 21871da177e4SLinus Torvalds break; 21881da177e4SLinus Torvalds } 21891da177e4SLinus Torvalds 21901da177e4SLinus Torvalds if (oldest_trans_id == 0) { 21911da177e4SLinus Torvalds reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1225: No valid " 21921da177e4SLinus Torvalds "transactions found") ; 21931da177e4SLinus Torvalds } 21941da177e4SLinus Torvalds /* j_start does not get set correctly if we don't replay any transactions. 21951da177e4SLinus Torvalds ** if we had a valid journal_header, set j_start to the first unflushed transaction value, 21961da177e4SLinus Torvalds ** copy the trans_id from the header 21971da177e4SLinus Torvalds */ 21981da177e4SLinus Torvalds if (valid_journal_header && replay_count == 0) { 21991da177e4SLinus Torvalds journal->j_start = le32_to_cpu(jh->j_first_unflushed_offset) ; 22001da177e4SLinus Torvalds journal->j_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) + 1; 22011da177e4SLinus Torvalds journal->j_last_flush_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) ; 22021da177e4SLinus Torvalds journal->j_mount_id = le32_to_cpu(jh->j_mount_id) + 1; 22031da177e4SLinus Torvalds } else { 22041da177e4SLinus Torvalds journal->j_mount_id = newest_mount_id + 1 ; 22051da177e4SLinus Torvalds } 22061da177e4SLinus Torvalds reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1299: Setting " 22071da177e4SLinus Torvalds "newest_mount_id to %lu", journal->j_mount_id) ; 22081da177e4SLinus Torvalds journal->j_first_unflushed_offset = journal->j_start ; 22091da177e4SLinus Torvalds if (replay_count > 0) { 22101da177e4SLinus Torvalds reiserfs_info (p_s_sb, "replayed %d transactions in %lu seconds\n", 22111da177e4SLinus Torvalds replay_count, get_seconds() - start) ; 22121da177e4SLinus Torvalds } 22131da177e4SLinus Torvalds if (!bdev_read_only(p_s_sb->s_bdev) && 22141da177e4SLinus Torvalds _update_journal_header_block(p_s_sb, journal->j_start, 22151da177e4SLinus Torvalds journal->j_last_flush_trans_id)) 22161da177e4SLinus Torvalds { 22171da177e4SLinus Torvalds /* replay failed, caller must call free_journal_ram and abort 22181da177e4SLinus Torvalds ** the mount 22191da177e4SLinus Torvalds */ 22201da177e4SLinus Torvalds return -1 ; 22211da177e4SLinus Torvalds } 22221da177e4SLinus Torvalds return 0 ; 22231da177e4SLinus Torvalds } 22241da177e4SLinus Torvalds 22251da177e4SLinus Torvalds static struct reiserfs_journal_list *alloc_journal_list(struct super_block *s) 22261da177e4SLinus Torvalds { 22271da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 22281da177e4SLinus Torvalds retry: 22291da177e4SLinus Torvalds jl = reiserfs_kmalloc(sizeof(struct reiserfs_journal_list), GFP_NOFS, s); 22301da177e4SLinus Torvalds if (!jl) { 22311da177e4SLinus Torvalds yield(); 22321da177e4SLinus Torvalds goto retry; 22331da177e4SLinus Torvalds } 22341da177e4SLinus Torvalds memset(jl, 0, sizeof(*jl)); 22351da177e4SLinus Torvalds INIT_LIST_HEAD(&jl->j_list); 22361da177e4SLinus Torvalds INIT_LIST_HEAD(&jl->j_working_list); 22371da177e4SLinus Torvalds INIT_LIST_HEAD(&jl->j_tail_bh_list); 22381da177e4SLinus Torvalds INIT_LIST_HEAD(&jl->j_bh_list); 22391da177e4SLinus Torvalds sema_init(&jl->j_commit_lock, 1); 22401da177e4SLinus Torvalds SB_JOURNAL(s)->j_num_lists++; 22411da177e4SLinus Torvalds get_journal_list(jl); 22421da177e4SLinus Torvalds return jl; 22431da177e4SLinus Torvalds } 22441da177e4SLinus Torvalds 22451da177e4SLinus Torvalds static void journal_list_init(struct super_block *p_s_sb) { 22461da177e4SLinus Torvalds SB_JOURNAL(p_s_sb)->j_current_jl = alloc_journal_list(p_s_sb); 22471da177e4SLinus Torvalds } 22481da177e4SLinus Torvalds 22491da177e4SLinus Torvalds static int release_journal_dev( struct super_block *super, 22501da177e4SLinus Torvalds struct reiserfs_journal *journal ) 22511da177e4SLinus Torvalds { 22521da177e4SLinus Torvalds int result; 22531da177e4SLinus Torvalds 22541da177e4SLinus Torvalds result = 0; 22551da177e4SLinus Torvalds 22561da177e4SLinus Torvalds if( journal -> j_dev_file != NULL ) { 22571da177e4SLinus Torvalds result = filp_close( journal -> j_dev_file, NULL ); 22581da177e4SLinus Torvalds journal -> j_dev_file = NULL; 22591da177e4SLinus Torvalds journal -> j_dev_bd = NULL; 22601da177e4SLinus Torvalds } else if( journal -> j_dev_bd != NULL ) { 22611da177e4SLinus Torvalds result = blkdev_put( journal -> j_dev_bd ); 22621da177e4SLinus Torvalds journal -> j_dev_bd = NULL; 22631da177e4SLinus Torvalds } 22641da177e4SLinus Torvalds 22651da177e4SLinus Torvalds if( result != 0 ) { 22661da177e4SLinus Torvalds reiserfs_warning(super, "sh-457: release_journal_dev: Cannot release journal device: %i", result ); 22671da177e4SLinus Torvalds } 22681da177e4SLinus Torvalds return result; 22691da177e4SLinus Torvalds } 22701da177e4SLinus Torvalds 22711da177e4SLinus Torvalds static int journal_init_dev( struct super_block *super, 22721da177e4SLinus Torvalds struct reiserfs_journal *journal, 22731da177e4SLinus Torvalds const char *jdev_name ) 22741da177e4SLinus Torvalds { 22751da177e4SLinus Torvalds int result; 22761da177e4SLinus Torvalds dev_t jdev; 22771da177e4SLinus Torvalds int blkdev_mode = FMODE_READ | FMODE_WRITE; 22781da177e4SLinus Torvalds char b[BDEVNAME_SIZE]; 22791da177e4SLinus Torvalds 22801da177e4SLinus Torvalds result = 0; 22811da177e4SLinus Torvalds 22821da177e4SLinus Torvalds journal -> j_dev_bd = NULL; 22831da177e4SLinus Torvalds journal -> j_dev_file = NULL; 22841da177e4SLinus Torvalds jdev = SB_ONDISK_JOURNAL_DEVICE( super ) ? 22851da177e4SLinus Torvalds new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super)) : super->s_dev; 22861da177e4SLinus Torvalds 22871da177e4SLinus Torvalds if (bdev_read_only(super->s_bdev)) 22881da177e4SLinus Torvalds blkdev_mode = FMODE_READ; 22891da177e4SLinus Torvalds 22901da177e4SLinus Torvalds /* there is no "jdev" option and journal is on separate device */ 22911da177e4SLinus Torvalds if( ( !jdev_name || !jdev_name[ 0 ] ) ) { 22921da177e4SLinus Torvalds journal->j_dev_bd = open_by_devnum(jdev, blkdev_mode); 22931da177e4SLinus Torvalds if (IS_ERR(journal->j_dev_bd)) { 22941da177e4SLinus Torvalds result = PTR_ERR(journal->j_dev_bd); 22951da177e4SLinus Torvalds journal->j_dev_bd = NULL; 22961da177e4SLinus Torvalds reiserfs_warning (super, "sh-458: journal_init_dev: " 22971da177e4SLinus Torvalds "cannot init journal device '%s': %i", 22981da177e4SLinus Torvalds __bdevname(jdev, b), result ); 22991da177e4SLinus Torvalds return result; 23001da177e4SLinus Torvalds } else if (jdev != super->s_dev) 23011da177e4SLinus Torvalds set_blocksize(journal->j_dev_bd, super->s_blocksize); 23021da177e4SLinus Torvalds return 0; 23031da177e4SLinus Torvalds } 23041da177e4SLinus Torvalds 23051da177e4SLinus Torvalds journal -> j_dev_file = filp_open( jdev_name, 0, 0 ); 23061da177e4SLinus Torvalds if( !IS_ERR( journal -> j_dev_file ) ) { 23071da177e4SLinus Torvalds struct inode *jdev_inode = journal->j_dev_file->f_mapping->host; 23081da177e4SLinus Torvalds if( !S_ISBLK( jdev_inode -> i_mode ) ) { 23091da177e4SLinus Torvalds reiserfs_warning (super, "journal_init_dev: '%s' is " 23101da177e4SLinus Torvalds "not a block device", jdev_name ); 23111da177e4SLinus Torvalds result = -ENOTBLK; 23121da177e4SLinus Torvalds } else { 23131da177e4SLinus Torvalds /* ok */ 23141da177e4SLinus Torvalds journal->j_dev_bd = I_BDEV(jdev_inode); 23151da177e4SLinus Torvalds set_blocksize(journal->j_dev_bd, super->s_blocksize); 23161da177e4SLinus Torvalds } 23171da177e4SLinus Torvalds } else { 23181da177e4SLinus Torvalds result = PTR_ERR( journal -> j_dev_file ); 23191da177e4SLinus Torvalds journal -> j_dev_file = NULL; 23201da177e4SLinus Torvalds reiserfs_warning (super, 23211da177e4SLinus Torvalds "journal_init_dev: Cannot open '%s': %i", 23221da177e4SLinus Torvalds jdev_name, result ); 23231da177e4SLinus Torvalds } 23241da177e4SLinus Torvalds if( result != 0 ) { 23251da177e4SLinus Torvalds release_journal_dev( super, journal ); 23261da177e4SLinus Torvalds } 23271da177e4SLinus Torvalds reiserfs_info(super, "journal_init_dev: journal device: %s\n", 23281da177e4SLinus Torvalds bdevname(journal->j_dev_bd, b)); 23291da177e4SLinus Torvalds return result; 23301da177e4SLinus Torvalds } 23311da177e4SLinus Torvalds 23321da177e4SLinus Torvalds /* 23331da177e4SLinus Torvalds ** must be called once on fs mount. calls journal_read for you 23341da177e4SLinus Torvalds */ 23351da177e4SLinus Torvalds int journal_init(struct super_block *p_s_sb, const char * j_dev_name, int old_format, unsigned int commit_max_age) { 23361da177e4SLinus Torvalds int num_cnodes = SB_ONDISK_JOURNAL_SIZE(p_s_sb) * 2 ; 23371da177e4SLinus Torvalds struct buffer_head *bhjh; 23381da177e4SLinus Torvalds struct reiserfs_super_block * rs; 23391da177e4SLinus Torvalds struct reiserfs_journal_header *jh; 23401da177e4SLinus Torvalds struct reiserfs_journal *journal; 23411da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 23421da177e4SLinus Torvalds char b[BDEVNAME_SIZE]; 23431da177e4SLinus Torvalds 23441da177e4SLinus Torvalds journal = SB_JOURNAL(p_s_sb) = vmalloc(sizeof (struct reiserfs_journal)) ; 23451da177e4SLinus Torvalds if (!journal) { 23461da177e4SLinus Torvalds reiserfs_warning (p_s_sb, "journal-1256: unable to get memory for journal structure") ; 23471da177e4SLinus Torvalds return 1 ; 23481da177e4SLinus Torvalds } 23491da177e4SLinus Torvalds memset(journal, 0, sizeof(struct reiserfs_journal)) ; 23501da177e4SLinus Torvalds INIT_LIST_HEAD(&journal->j_bitmap_nodes) ; 23511da177e4SLinus Torvalds INIT_LIST_HEAD (&journal->j_prealloc_list); 23521da177e4SLinus Torvalds INIT_LIST_HEAD(&journal->j_working_list); 23531da177e4SLinus Torvalds INIT_LIST_HEAD(&journal->j_journal_list); 23541da177e4SLinus Torvalds journal->j_persistent_trans = 0; 23551da177e4SLinus Torvalds if (reiserfs_allocate_list_bitmaps(p_s_sb, 23561da177e4SLinus Torvalds journal->j_list_bitmap, 23571da177e4SLinus Torvalds SB_BMAP_NR(p_s_sb))) 23581da177e4SLinus Torvalds goto free_and_return ; 23591da177e4SLinus Torvalds allocate_bitmap_nodes(p_s_sb) ; 23601da177e4SLinus Torvalds 23611da177e4SLinus Torvalds /* reserved for journal area support */ 23621da177e4SLinus Torvalds SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb) = (old_format ? 23631da177e4SLinus Torvalds REISERFS_OLD_DISK_OFFSET_IN_BYTES / p_s_sb->s_blocksize + 23641da177e4SLinus Torvalds SB_BMAP_NR(p_s_sb) + 1 : 23651da177e4SLinus Torvalds REISERFS_DISK_OFFSET_IN_BYTES / p_s_sb->s_blocksize + 2); 23661da177e4SLinus Torvalds 23671da177e4SLinus Torvalds /* Sanity check to see is the standard journal fitting withing first bitmap 23681da177e4SLinus Torvalds (actual for small blocksizes) */ 23691da177e4SLinus Torvalds if ( !SB_ONDISK_JOURNAL_DEVICE( p_s_sb ) && 23701da177e4SLinus Torvalds (SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb) + SB_ONDISK_JOURNAL_SIZE(p_s_sb) > p_s_sb->s_blocksize * 8) ) { 23711da177e4SLinus Torvalds reiserfs_warning (p_s_sb, "journal-1393: journal does not fit for area " 23721da177e4SLinus Torvalds "addressed by first of bitmap blocks. It starts at " 23731da177e4SLinus Torvalds "%u and its size is %u. Block size %ld", 23741da177e4SLinus Torvalds SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb), 23751da177e4SLinus Torvalds SB_ONDISK_JOURNAL_SIZE(p_s_sb), p_s_sb->s_blocksize); 23761da177e4SLinus Torvalds goto free_and_return; 23771da177e4SLinus Torvalds } 23781da177e4SLinus Torvalds 23791da177e4SLinus Torvalds if( journal_init_dev( p_s_sb, journal, j_dev_name ) != 0 ) { 23801da177e4SLinus Torvalds reiserfs_warning (p_s_sb, "sh-462: unable to initialize jornal device"); 23811da177e4SLinus Torvalds goto free_and_return; 23821da177e4SLinus Torvalds } 23831da177e4SLinus Torvalds 23841da177e4SLinus Torvalds rs = SB_DISK_SUPER_BLOCK(p_s_sb); 23851da177e4SLinus Torvalds 23861da177e4SLinus Torvalds /* read journal header */ 23871da177e4SLinus Torvalds bhjh = journal_bread(p_s_sb, 23881da177e4SLinus Torvalds SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + SB_ONDISK_JOURNAL_SIZE(p_s_sb)); 23891da177e4SLinus Torvalds if (!bhjh) { 23901da177e4SLinus Torvalds reiserfs_warning (p_s_sb, "sh-459: unable to read journal header"); 23911da177e4SLinus Torvalds goto free_and_return; 23921da177e4SLinus Torvalds } 23931da177e4SLinus Torvalds jh = (struct reiserfs_journal_header *)(bhjh->b_data); 23941da177e4SLinus Torvalds 23951da177e4SLinus Torvalds /* make sure that journal matches to the super block */ 23961da177e4SLinus Torvalds if (is_reiserfs_jr(rs) && (jh->jh_journal.jp_journal_magic != sb_jp_journal_magic(rs))) { 23971da177e4SLinus Torvalds reiserfs_warning (p_s_sb, "sh-460: journal header magic %x " 23981da177e4SLinus Torvalds "(device %s) does not match to magic found in super " 23991da177e4SLinus Torvalds "block %x", 24001da177e4SLinus Torvalds jh->jh_journal.jp_journal_magic, 24011da177e4SLinus Torvalds bdevname( journal->j_dev_bd, b), 24021da177e4SLinus Torvalds sb_jp_journal_magic(rs)); 24031da177e4SLinus Torvalds brelse (bhjh); 24041da177e4SLinus Torvalds goto free_and_return; 24051da177e4SLinus Torvalds } 24061da177e4SLinus Torvalds 24071da177e4SLinus Torvalds journal->j_trans_max = le32_to_cpu (jh->jh_journal.jp_journal_trans_max); 24081da177e4SLinus Torvalds journal->j_max_batch = le32_to_cpu (jh->jh_journal.jp_journal_max_batch); 24091da177e4SLinus Torvalds journal->j_max_commit_age = le32_to_cpu (jh->jh_journal.jp_journal_max_commit_age); 24101da177e4SLinus Torvalds journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; 24111da177e4SLinus Torvalds 24121da177e4SLinus Torvalds if (journal->j_trans_max) { 24131da177e4SLinus Torvalds /* make sure these parameters are available, assign it if they are not */ 24141da177e4SLinus Torvalds __u32 initial = journal->j_trans_max; 24151da177e4SLinus Torvalds __u32 ratio = 1; 24161da177e4SLinus Torvalds 24171da177e4SLinus Torvalds if (p_s_sb->s_blocksize < 4096) 24181da177e4SLinus Torvalds ratio = 4096 / p_s_sb->s_blocksize; 24191da177e4SLinus Torvalds 24201da177e4SLinus Torvalds if (SB_ONDISK_JOURNAL_SIZE(p_s_sb)/journal->j_trans_max < JOURNAL_MIN_RATIO) 24211da177e4SLinus Torvalds journal->j_trans_max = SB_ONDISK_JOURNAL_SIZE(p_s_sb) / JOURNAL_MIN_RATIO; 24221da177e4SLinus Torvalds if (journal->j_trans_max > JOURNAL_TRANS_MAX_DEFAULT / ratio) 24231da177e4SLinus Torvalds journal->j_trans_max = JOURNAL_TRANS_MAX_DEFAULT / ratio; 24241da177e4SLinus Torvalds if (journal->j_trans_max < JOURNAL_TRANS_MIN_DEFAULT / ratio) 24251da177e4SLinus Torvalds journal->j_trans_max = JOURNAL_TRANS_MIN_DEFAULT / ratio; 24261da177e4SLinus Torvalds 24271da177e4SLinus Torvalds if (journal->j_trans_max != initial) 24281da177e4SLinus Torvalds reiserfs_warning (p_s_sb, "sh-461: journal_init: wrong transaction max size (%u). Changed to %u", 24291da177e4SLinus Torvalds initial, journal->j_trans_max); 24301da177e4SLinus Torvalds 24311da177e4SLinus Torvalds journal->j_max_batch = journal->j_trans_max* 24321da177e4SLinus Torvalds JOURNAL_MAX_BATCH_DEFAULT/JOURNAL_TRANS_MAX_DEFAULT; 24331da177e4SLinus Torvalds } 24341da177e4SLinus Torvalds 24351da177e4SLinus Torvalds if (!journal->j_trans_max) { 24361da177e4SLinus Torvalds /*we have the file system was created by old version of mkreiserfs 24371da177e4SLinus Torvalds so this field contains zero value */ 24381da177e4SLinus Torvalds journal->j_trans_max = JOURNAL_TRANS_MAX_DEFAULT ; 24391da177e4SLinus Torvalds journal->j_max_batch = JOURNAL_MAX_BATCH_DEFAULT ; 24401da177e4SLinus Torvalds journal->j_max_commit_age = JOURNAL_MAX_COMMIT_AGE ; 24411da177e4SLinus Torvalds 24421da177e4SLinus Torvalds /* for blocksize >= 4096 - max transaction size is 1024. For block size < 4096 24431da177e4SLinus Torvalds trans max size is decreased proportionally */ 24441da177e4SLinus Torvalds if (p_s_sb->s_blocksize < 4096) { 24451da177e4SLinus Torvalds journal->j_trans_max /= (4096 / p_s_sb->s_blocksize) ; 24461da177e4SLinus Torvalds journal->j_max_batch = (journal->j_trans_max) * 9 / 10 ; 24471da177e4SLinus Torvalds } 24481da177e4SLinus Torvalds } 24491da177e4SLinus Torvalds 24501da177e4SLinus Torvalds journal->j_default_max_commit_age = journal->j_max_commit_age; 24511da177e4SLinus Torvalds 24521da177e4SLinus Torvalds if (commit_max_age != 0) { 24531da177e4SLinus Torvalds journal->j_max_commit_age = commit_max_age; 24541da177e4SLinus Torvalds journal->j_max_trans_age = commit_max_age; 24551da177e4SLinus Torvalds } 24561da177e4SLinus Torvalds 24571da177e4SLinus Torvalds reiserfs_info (p_s_sb, "journal params: device %s, size %u, " 24581da177e4SLinus Torvalds "journal first block %u, max trans len %u, max batch %u, " 24591da177e4SLinus Torvalds "max commit age %u, max trans age %u\n", 24601da177e4SLinus Torvalds bdevname( journal->j_dev_bd, b), 24611da177e4SLinus Torvalds SB_ONDISK_JOURNAL_SIZE(p_s_sb), 24621da177e4SLinus Torvalds SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), 24631da177e4SLinus Torvalds journal->j_trans_max, 24641da177e4SLinus Torvalds journal->j_max_batch, 24651da177e4SLinus Torvalds journal->j_max_commit_age, 24661da177e4SLinus Torvalds journal->j_max_trans_age); 24671da177e4SLinus Torvalds 24681da177e4SLinus Torvalds brelse (bhjh); 24691da177e4SLinus Torvalds 24701da177e4SLinus Torvalds journal->j_list_bitmap_index = 0 ; 24711da177e4SLinus Torvalds journal_list_init(p_s_sb) ; 24721da177e4SLinus Torvalds 24731da177e4SLinus Torvalds memset(journal->j_list_hash_table, 0, JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)) ; 24741da177e4SLinus Torvalds 24751da177e4SLinus Torvalds INIT_LIST_HEAD(&journal->j_dirty_buffers) ; 24761da177e4SLinus Torvalds spin_lock_init(&journal->j_dirty_buffers_lock) ; 24771da177e4SLinus Torvalds 24781da177e4SLinus Torvalds journal->j_start = 0 ; 24791da177e4SLinus Torvalds journal->j_len = 0 ; 24801da177e4SLinus Torvalds journal->j_len_alloc = 0 ; 24811da177e4SLinus Torvalds atomic_set(&(journal->j_wcount), 0) ; 24821da177e4SLinus Torvalds atomic_set(&(journal->j_async_throttle), 0) ; 24831da177e4SLinus Torvalds journal->j_bcount = 0 ; 24841da177e4SLinus Torvalds journal->j_trans_start_time = 0 ; 24851da177e4SLinus Torvalds journal->j_last = NULL ; 24861da177e4SLinus Torvalds journal->j_first = NULL ; 24871da177e4SLinus Torvalds init_waitqueue_head(&(journal->j_join_wait)) ; 24881da177e4SLinus Torvalds sema_init(&journal->j_lock, 1); 24891da177e4SLinus Torvalds sema_init(&journal->j_flush_sem, 1); 24901da177e4SLinus Torvalds 24911da177e4SLinus Torvalds journal->j_trans_id = 10 ; 24921da177e4SLinus Torvalds journal->j_mount_id = 10 ; 24931da177e4SLinus Torvalds journal->j_state = 0 ; 24941da177e4SLinus Torvalds atomic_set(&(journal->j_jlock), 0) ; 24951da177e4SLinus Torvalds journal->j_cnode_free_list = allocate_cnodes(num_cnodes) ; 24961da177e4SLinus Torvalds journal->j_cnode_free_orig = journal->j_cnode_free_list ; 24971da177e4SLinus Torvalds journal->j_cnode_free = journal->j_cnode_free_list ? num_cnodes : 0 ; 24981da177e4SLinus Torvalds journal->j_cnode_used = 0 ; 24991da177e4SLinus Torvalds journal->j_must_wait = 0 ; 25001da177e4SLinus Torvalds 25011da177e4SLinus Torvalds init_journal_hash(p_s_sb) ; 25021da177e4SLinus Torvalds jl = journal->j_current_jl; 25031da177e4SLinus Torvalds jl->j_list_bitmap = get_list_bitmap(p_s_sb, jl); 25041da177e4SLinus Torvalds if (!jl->j_list_bitmap) { 25051da177e4SLinus Torvalds reiserfs_warning(p_s_sb, "journal-2005, get_list_bitmap failed for journal list 0") ; 25061da177e4SLinus Torvalds goto free_and_return; 25071da177e4SLinus Torvalds } 25081da177e4SLinus Torvalds if (journal_read(p_s_sb) < 0) { 25091da177e4SLinus Torvalds reiserfs_warning(p_s_sb, "Replay Failure, unable to mount") ; 25101da177e4SLinus Torvalds goto free_and_return; 25111da177e4SLinus Torvalds } 25121da177e4SLinus Torvalds 25131da177e4SLinus Torvalds reiserfs_mounted_fs_count++ ; 25141da177e4SLinus Torvalds if (reiserfs_mounted_fs_count <= 1) 25151da177e4SLinus Torvalds commit_wq = create_workqueue("reiserfs"); 25161da177e4SLinus Torvalds 25171da177e4SLinus Torvalds INIT_WORK(&journal->j_work, flush_async_commits, p_s_sb); 25181da177e4SLinus Torvalds return 0 ; 25191da177e4SLinus Torvalds free_and_return: 25201da177e4SLinus Torvalds free_journal_ram(p_s_sb); 25211da177e4SLinus Torvalds return 1; 25221da177e4SLinus Torvalds } 25231da177e4SLinus Torvalds 25241da177e4SLinus Torvalds /* 25251da177e4SLinus Torvalds ** test for a polite end of the current transaction. Used by file_write, and should 25261da177e4SLinus Torvalds ** be used by delete to make sure they don't write more than can fit inside a single 25271da177e4SLinus Torvalds ** transaction 25281da177e4SLinus Torvalds */ 25291da177e4SLinus Torvalds int journal_transaction_should_end(struct reiserfs_transaction_handle *th, int new_alloc) { 25301da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (th->t_super); 25311da177e4SLinus Torvalds time_t now = get_seconds() ; 25321da177e4SLinus Torvalds /* cannot restart while nested */ 25331da177e4SLinus Torvalds BUG_ON (!th->t_trans_id); 25341da177e4SLinus Torvalds if (th->t_refcount > 1) 25351da177e4SLinus Torvalds return 0 ; 25361da177e4SLinus Torvalds if ( journal->j_must_wait > 0 || 25371da177e4SLinus Torvalds (journal->j_len_alloc + new_alloc) >= journal->j_max_batch || 25381da177e4SLinus Torvalds atomic_read(&(journal->j_jlock)) || 25391da177e4SLinus Torvalds (now - journal->j_trans_start_time) > journal->j_max_trans_age || 25401da177e4SLinus Torvalds journal->j_cnode_free < (journal->j_trans_max * 3)) { 25411da177e4SLinus Torvalds return 1 ; 25421da177e4SLinus Torvalds } 25431da177e4SLinus Torvalds return 0 ; 25441da177e4SLinus Torvalds } 25451da177e4SLinus Torvalds 25461da177e4SLinus Torvalds /* this must be called inside a transaction, and requires the 25471da177e4SLinus Torvalds ** kernel_lock to be held 25481da177e4SLinus Torvalds */ 25491da177e4SLinus Torvalds void reiserfs_block_writes(struct reiserfs_transaction_handle *th) { 25501da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (th->t_super); 25511da177e4SLinus Torvalds BUG_ON (!th->t_trans_id); 25521da177e4SLinus Torvalds journal->j_must_wait = 1 ; 25531da177e4SLinus Torvalds set_bit(J_WRITERS_BLOCKED, &journal->j_state) ; 25541da177e4SLinus Torvalds return ; 25551da177e4SLinus Torvalds } 25561da177e4SLinus Torvalds 25571da177e4SLinus Torvalds /* this must be called without a transaction started, and does not 25581da177e4SLinus Torvalds ** require BKL 25591da177e4SLinus Torvalds */ 25601da177e4SLinus Torvalds void reiserfs_allow_writes(struct super_block *s) { 25611da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (s); 25621da177e4SLinus Torvalds clear_bit(J_WRITERS_BLOCKED, &journal->j_state) ; 25631da177e4SLinus Torvalds wake_up(&journal->j_join_wait) ; 25641da177e4SLinus Torvalds } 25651da177e4SLinus Torvalds 25661da177e4SLinus Torvalds /* this must be called without a transaction started, and does not 25671da177e4SLinus Torvalds ** require BKL 25681da177e4SLinus Torvalds */ 25691da177e4SLinus Torvalds void reiserfs_wait_on_write_block(struct super_block *s) { 25701da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (s); 25711da177e4SLinus Torvalds wait_event(journal->j_join_wait, 25721da177e4SLinus Torvalds !test_bit(J_WRITERS_BLOCKED, &journal->j_state)) ; 25731da177e4SLinus Torvalds } 25741da177e4SLinus Torvalds 25751da177e4SLinus Torvalds static void queue_log_writer(struct super_block *s) { 25761da177e4SLinus Torvalds wait_queue_t wait; 25771da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (s); 25781da177e4SLinus Torvalds set_bit(J_WRITERS_QUEUED, &journal->j_state); 25791da177e4SLinus Torvalds 25801da177e4SLinus Torvalds /* 25811da177e4SLinus Torvalds * we don't want to use wait_event here because 25821da177e4SLinus Torvalds * we only want to wait once. 25831da177e4SLinus Torvalds */ 25841da177e4SLinus Torvalds init_waitqueue_entry(&wait, current); 25851da177e4SLinus Torvalds add_wait_queue(&journal->j_join_wait, &wait); 25861da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 25871da177e4SLinus Torvalds if (test_bit(J_WRITERS_QUEUED, &journal->j_state)) 25881da177e4SLinus Torvalds schedule(); 25891da177e4SLinus Torvalds current->state = TASK_RUNNING; 25901da177e4SLinus Torvalds remove_wait_queue(&journal->j_join_wait, &wait); 25911da177e4SLinus Torvalds } 25921da177e4SLinus Torvalds 25931da177e4SLinus Torvalds static void wake_queued_writers(struct super_block *s) { 25941da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (s); 25951da177e4SLinus Torvalds if (test_and_clear_bit(J_WRITERS_QUEUED, &journal->j_state)) 25961da177e4SLinus Torvalds wake_up(&journal->j_join_wait); 25971da177e4SLinus Torvalds } 25981da177e4SLinus Torvalds 25991da177e4SLinus Torvalds static void let_transaction_grow(struct super_block *sb, 26001da177e4SLinus Torvalds unsigned long trans_id) 26011da177e4SLinus Torvalds { 26021da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (sb); 26031da177e4SLinus Torvalds unsigned long bcount = journal->j_bcount; 26041da177e4SLinus Torvalds while(1) { 26051da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 26061da177e4SLinus Torvalds schedule_timeout(1); 26071da177e4SLinus Torvalds journal->j_current_jl->j_state |= LIST_COMMIT_PENDING; 26081da177e4SLinus Torvalds while ((atomic_read(&journal->j_wcount) > 0 || 26091da177e4SLinus Torvalds atomic_read(&journal->j_jlock)) && 26101da177e4SLinus Torvalds journal->j_trans_id == trans_id) { 26111da177e4SLinus Torvalds queue_log_writer(sb); 26121da177e4SLinus Torvalds } 26131da177e4SLinus Torvalds if (journal->j_trans_id != trans_id) 26141da177e4SLinus Torvalds break; 26151da177e4SLinus Torvalds if (bcount == journal->j_bcount) 26161da177e4SLinus Torvalds break; 26171da177e4SLinus Torvalds bcount = journal->j_bcount; 26181da177e4SLinus Torvalds } 26191da177e4SLinus Torvalds } 26201da177e4SLinus Torvalds 26211da177e4SLinus Torvalds /* join == true if you must join an existing transaction. 26221da177e4SLinus Torvalds ** join == false if you can deal with waiting for others to finish 26231da177e4SLinus Torvalds ** 26241da177e4SLinus Torvalds ** this will block until the transaction is joinable. send the number of blocks you 26251da177e4SLinus Torvalds ** expect to use in nblocks. 26261da177e4SLinus Torvalds */ 26271da177e4SLinus Torvalds static int do_journal_begin_r(struct reiserfs_transaction_handle *th, struct super_block * p_s_sb,unsigned long nblocks,int join) { 26281da177e4SLinus Torvalds time_t now = get_seconds() ; 26291da177e4SLinus Torvalds int old_trans_id ; 26301da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); 26311da177e4SLinus Torvalds struct reiserfs_transaction_handle myth; 26321da177e4SLinus Torvalds int sched_count = 0; 26331da177e4SLinus Torvalds int retval; 26341da177e4SLinus Torvalds 26351da177e4SLinus Torvalds reiserfs_check_lock_depth(p_s_sb, "journal_begin") ; 26361da177e4SLinus Torvalds 26371da177e4SLinus Torvalds PROC_INFO_INC( p_s_sb, journal.journal_being ); 26381da177e4SLinus Torvalds /* set here for journal_join */ 26391da177e4SLinus Torvalds th->t_refcount = 1; 26401da177e4SLinus Torvalds th->t_super = p_s_sb ; 26411da177e4SLinus Torvalds 26421da177e4SLinus Torvalds relock: 26431da177e4SLinus Torvalds lock_journal(p_s_sb) ; 26441da177e4SLinus Torvalds if (join != JBEGIN_ABORT && reiserfs_is_journal_aborted (journal)) { 26451da177e4SLinus Torvalds unlock_journal (p_s_sb); 26461da177e4SLinus Torvalds retval = journal->j_errno; 26471da177e4SLinus Torvalds goto out_fail; 26481da177e4SLinus Torvalds } 26491da177e4SLinus Torvalds journal->j_bcount++; 26501da177e4SLinus Torvalds 26511da177e4SLinus Torvalds if (test_bit(J_WRITERS_BLOCKED, &journal->j_state)) { 26521da177e4SLinus Torvalds unlock_journal(p_s_sb) ; 26531da177e4SLinus Torvalds reiserfs_wait_on_write_block(p_s_sb) ; 26541da177e4SLinus Torvalds PROC_INFO_INC( p_s_sb, journal.journal_relock_writers ); 26551da177e4SLinus Torvalds goto relock ; 26561da177e4SLinus Torvalds } 26571da177e4SLinus Torvalds now = get_seconds(); 26581da177e4SLinus Torvalds 26591da177e4SLinus Torvalds /* if there is no room in the journal OR 26601da177e4SLinus Torvalds ** if this transaction is too old, and we weren't called joinable, wait for it to finish before beginning 26611da177e4SLinus Torvalds ** we don't sleep if there aren't other writers 26621da177e4SLinus Torvalds */ 26631da177e4SLinus Torvalds 26641da177e4SLinus Torvalds if ( (!join && journal->j_must_wait > 0) || 26651da177e4SLinus Torvalds ( !join && (journal->j_len_alloc + nblocks + 2) >= journal->j_max_batch) || 26661da177e4SLinus Torvalds (!join && atomic_read(&journal->j_wcount) > 0 && journal->j_trans_start_time > 0 && 26671da177e4SLinus Torvalds (now - journal->j_trans_start_time) > journal->j_max_trans_age) || 26681da177e4SLinus Torvalds (!join && atomic_read(&journal->j_jlock)) || 26691da177e4SLinus Torvalds (!join && journal->j_cnode_free < (journal->j_trans_max * 3))) { 26701da177e4SLinus Torvalds 26711da177e4SLinus Torvalds old_trans_id = journal->j_trans_id; 26721da177e4SLinus Torvalds unlock_journal(p_s_sb) ; /* allow others to finish this transaction */ 26731da177e4SLinus Torvalds 26741da177e4SLinus Torvalds if (!join && (journal->j_len_alloc + nblocks + 2) >= 26751da177e4SLinus Torvalds journal->j_max_batch && 26761da177e4SLinus Torvalds ((journal->j_len + nblocks + 2) * 100) < (journal->j_len_alloc * 75)) 26771da177e4SLinus Torvalds { 26781da177e4SLinus Torvalds if (atomic_read(&journal->j_wcount) > 10) { 26791da177e4SLinus Torvalds sched_count++; 26801da177e4SLinus Torvalds queue_log_writer(p_s_sb); 26811da177e4SLinus Torvalds goto relock; 26821da177e4SLinus Torvalds } 26831da177e4SLinus Torvalds } 26841da177e4SLinus Torvalds /* don't mess with joining the transaction if all we have to do is 26851da177e4SLinus Torvalds * wait for someone else to do a commit 26861da177e4SLinus Torvalds */ 26871da177e4SLinus Torvalds if (atomic_read(&journal->j_jlock)) { 26881da177e4SLinus Torvalds while (journal->j_trans_id == old_trans_id && 26891da177e4SLinus Torvalds atomic_read(&journal->j_jlock)) { 26901da177e4SLinus Torvalds queue_log_writer(p_s_sb); 26911da177e4SLinus Torvalds } 26921da177e4SLinus Torvalds goto relock; 26931da177e4SLinus Torvalds } 26941da177e4SLinus Torvalds retval = journal_join(&myth, p_s_sb, 1) ; 26951da177e4SLinus Torvalds if (retval) 26961da177e4SLinus Torvalds goto out_fail; 26971da177e4SLinus Torvalds 26981da177e4SLinus Torvalds /* someone might have ended the transaction while we joined */ 26991da177e4SLinus Torvalds if (old_trans_id != journal->j_trans_id) { 27001da177e4SLinus Torvalds retval = do_journal_end(&myth, p_s_sb, 1, 0) ; 27011da177e4SLinus Torvalds } else { 27021da177e4SLinus Torvalds retval = do_journal_end(&myth, p_s_sb, 1, COMMIT_NOW) ; 27031da177e4SLinus Torvalds } 27041da177e4SLinus Torvalds 27051da177e4SLinus Torvalds if (retval) 27061da177e4SLinus Torvalds goto out_fail; 27071da177e4SLinus Torvalds 27081da177e4SLinus Torvalds PROC_INFO_INC( p_s_sb, journal.journal_relock_wcount ); 27091da177e4SLinus Torvalds goto relock ; 27101da177e4SLinus Torvalds } 27111da177e4SLinus Torvalds /* we are the first writer, set trans_id */ 27121da177e4SLinus Torvalds if (journal->j_trans_start_time == 0) { 27131da177e4SLinus Torvalds journal->j_trans_start_time = get_seconds(); 27141da177e4SLinus Torvalds } 27151da177e4SLinus Torvalds atomic_inc(&(journal->j_wcount)) ; 27161da177e4SLinus Torvalds journal->j_len_alloc += nblocks ; 27171da177e4SLinus Torvalds th->t_blocks_logged = 0 ; 27181da177e4SLinus Torvalds th->t_blocks_allocated = nblocks ; 27191da177e4SLinus Torvalds th->t_trans_id = journal->j_trans_id ; 27201da177e4SLinus Torvalds unlock_journal(p_s_sb) ; 27211da177e4SLinus Torvalds INIT_LIST_HEAD (&th->t_list); 27221da177e4SLinus Torvalds return 0 ; 27231da177e4SLinus Torvalds 27241da177e4SLinus Torvalds out_fail: 27251da177e4SLinus Torvalds memset (th, 0, sizeof (*th)); 27261da177e4SLinus Torvalds /* Re-set th->t_super, so we can properly keep track of how many 27271da177e4SLinus Torvalds * persistent transactions there are. We need to do this so if this 27281da177e4SLinus Torvalds * call is part of a failed restart_transaction, we can free it later */ 27291da177e4SLinus Torvalds th->t_super = p_s_sb; 27301da177e4SLinus Torvalds return retval; 27311da177e4SLinus Torvalds } 27321da177e4SLinus Torvalds 27331da177e4SLinus Torvalds struct reiserfs_transaction_handle * 27341da177e4SLinus Torvalds reiserfs_persistent_transaction(struct super_block *s, int nblocks) { 27351da177e4SLinus Torvalds int ret ; 27361da177e4SLinus Torvalds struct reiserfs_transaction_handle *th ; 27371da177e4SLinus Torvalds 27381da177e4SLinus Torvalds /* if we're nesting into an existing transaction. It will be 27391da177e4SLinus Torvalds ** persistent on its own 27401da177e4SLinus Torvalds */ 27411da177e4SLinus Torvalds if (reiserfs_transaction_running(s)) { 27421da177e4SLinus Torvalds th = current->journal_info ; 27431da177e4SLinus Torvalds th->t_refcount++ ; 27441da177e4SLinus Torvalds if (th->t_refcount < 2) { 27451da177e4SLinus Torvalds BUG() ; 27461da177e4SLinus Torvalds } 27471da177e4SLinus Torvalds return th ; 27481da177e4SLinus Torvalds } 27491da177e4SLinus Torvalds th = reiserfs_kmalloc(sizeof(struct reiserfs_transaction_handle), GFP_NOFS, s) ; 27501da177e4SLinus Torvalds if (!th) 27511da177e4SLinus Torvalds return NULL; 27521da177e4SLinus Torvalds ret = journal_begin(th, s, nblocks) ; 27531da177e4SLinus Torvalds if (ret) { 27541da177e4SLinus Torvalds reiserfs_kfree(th, sizeof(struct reiserfs_transaction_handle), s) ; 27551da177e4SLinus Torvalds return NULL; 27561da177e4SLinus Torvalds } 27571da177e4SLinus Torvalds 27581da177e4SLinus Torvalds SB_JOURNAL(s)->j_persistent_trans++; 27591da177e4SLinus Torvalds return th ; 27601da177e4SLinus Torvalds } 27611da177e4SLinus Torvalds 27621da177e4SLinus Torvalds int 27631da177e4SLinus Torvalds reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *th) { 27641da177e4SLinus Torvalds struct super_block *s = th->t_super; 27651da177e4SLinus Torvalds int ret = 0; 27661da177e4SLinus Torvalds if (th->t_trans_id) 27671da177e4SLinus Torvalds ret = journal_end(th, th->t_super, th->t_blocks_allocated); 27681da177e4SLinus Torvalds else 27691da177e4SLinus Torvalds ret = -EIO; 27701da177e4SLinus Torvalds if (th->t_refcount == 0) { 27711da177e4SLinus Torvalds SB_JOURNAL(s)->j_persistent_trans--; 27721da177e4SLinus Torvalds reiserfs_kfree(th, sizeof(struct reiserfs_transaction_handle), s) ; 27731da177e4SLinus Torvalds } 27741da177e4SLinus Torvalds return ret; 27751da177e4SLinus Torvalds } 27761da177e4SLinus Torvalds 27771da177e4SLinus Torvalds static int journal_join(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, unsigned long nblocks) { 27781da177e4SLinus Torvalds struct reiserfs_transaction_handle *cur_th = current->journal_info; 27791da177e4SLinus Torvalds 27801da177e4SLinus Torvalds /* this keeps do_journal_end from NULLing out the current->journal_info 27811da177e4SLinus Torvalds ** pointer 27821da177e4SLinus Torvalds */ 27831da177e4SLinus Torvalds th->t_handle_save = cur_th ; 27841da177e4SLinus Torvalds if (cur_th && cur_th->t_refcount > 1) { 27851da177e4SLinus Torvalds BUG() ; 27861da177e4SLinus Torvalds } 27871da177e4SLinus Torvalds return do_journal_begin_r(th, p_s_sb, nblocks, JBEGIN_JOIN) ; 27881da177e4SLinus Torvalds } 27891da177e4SLinus Torvalds 27901da177e4SLinus Torvalds int journal_join_abort(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, unsigned long nblocks) { 27911da177e4SLinus Torvalds struct reiserfs_transaction_handle *cur_th = current->journal_info; 27921da177e4SLinus Torvalds 27931da177e4SLinus Torvalds /* this keeps do_journal_end from NULLing out the current->journal_info 27941da177e4SLinus Torvalds ** pointer 27951da177e4SLinus Torvalds */ 27961da177e4SLinus Torvalds th->t_handle_save = cur_th ; 27971da177e4SLinus Torvalds if (cur_th && cur_th->t_refcount > 1) { 27981da177e4SLinus Torvalds BUG() ; 27991da177e4SLinus Torvalds } 28001da177e4SLinus Torvalds return do_journal_begin_r(th, p_s_sb, nblocks, JBEGIN_ABORT) ; 28011da177e4SLinus Torvalds } 28021da177e4SLinus Torvalds 28031da177e4SLinus Torvalds int journal_begin(struct reiserfs_transaction_handle *th, struct super_block * p_s_sb, unsigned long nblocks) { 28041da177e4SLinus Torvalds struct reiserfs_transaction_handle *cur_th = current->journal_info ; 28051da177e4SLinus Torvalds int ret ; 28061da177e4SLinus Torvalds 28071da177e4SLinus Torvalds th->t_handle_save = NULL ; 28081da177e4SLinus Torvalds if (cur_th) { 28091da177e4SLinus Torvalds /* we are nesting into the current transaction */ 28101da177e4SLinus Torvalds if (cur_th->t_super == p_s_sb) { 28111da177e4SLinus Torvalds BUG_ON (!cur_th->t_refcount); 28121da177e4SLinus Torvalds cur_th->t_refcount++ ; 28131da177e4SLinus Torvalds memcpy(th, cur_th, sizeof(*th)); 28141da177e4SLinus Torvalds if (th->t_refcount <= 1) 28151da177e4SLinus Torvalds reiserfs_warning (p_s_sb, "BAD: refcount <= 1, but journal_info != 0"); 28161da177e4SLinus Torvalds return 0; 28171da177e4SLinus Torvalds } else { 28181da177e4SLinus Torvalds /* we've ended up with a handle from a different filesystem. 28191da177e4SLinus Torvalds ** save it and restore on journal_end. This should never 28201da177e4SLinus Torvalds ** really happen... 28211da177e4SLinus Torvalds */ 28221da177e4SLinus Torvalds reiserfs_warning(p_s_sb, "clm-2100: nesting info a different FS") ; 28231da177e4SLinus Torvalds th->t_handle_save = current->journal_info ; 28241da177e4SLinus Torvalds current->journal_info = th; 28251da177e4SLinus Torvalds } 28261da177e4SLinus Torvalds } else { 28271da177e4SLinus Torvalds current->journal_info = th; 28281da177e4SLinus Torvalds } 28291da177e4SLinus Torvalds ret = do_journal_begin_r(th, p_s_sb, nblocks, JBEGIN_REG) ; 28301da177e4SLinus Torvalds if (current->journal_info != th) 28311da177e4SLinus Torvalds BUG() ; 28321da177e4SLinus Torvalds 28331da177e4SLinus Torvalds /* I guess this boils down to being the reciprocal of clm-2100 above. 28341da177e4SLinus Torvalds * If do_journal_begin_r fails, we need to put it back, since journal_end 28351da177e4SLinus Torvalds * won't be called to do it. */ 28361da177e4SLinus Torvalds if (ret) 28371da177e4SLinus Torvalds current->journal_info = th->t_handle_save; 28381da177e4SLinus Torvalds else 28391da177e4SLinus Torvalds BUG_ON (!th->t_refcount); 28401da177e4SLinus Torvalds 28411da177e4SLinus Torvalds return ret ; 28421da177e4SLinus Torvalds } 28431da177e4SLinus Torvalds 28441da177e4SLinus Torvalds /* 28451da177e4SLinus Torvalds ** puts bh into the current transaction. If it was already there, reorders removes the 28461da177e4SLinus Torvalds ** old pointers from the hash, and puts new ones in (to make sure replay happen in the right order). 28471da177e4SLinus Torvalds ** 28481da177e4SLinus Torvalds ** if it was dirty, cleans and files onto the clean list. I can't let it be dirty again until the 28491da177e4SLinus Torvalds ** transaction is committed. 28501da177e4SLinus Torvalds ** 28511da177e4SLinus Torvalds ** if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len. 28521da177e4SLinus Torvalds */ 28531da177e4SLinus Torvalds int journal_mark_dirty(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, struct buffer_head *bh) { 28541da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 28551da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn = NULL; 28561da177e4SLinus Torvalds int count_already_incd = 0 ; 28571da177e4SLinus Torvalds int prepared = 0 ; 28581da177e4SLinus Torvalds BUG_ON (!th->t_trans_id); 28591da177e4SLinus Torvalds 28601da177e4SLinus Torvalds PROC_INFO_INC( p_s_sb, journal.mark_dirty ); 28611da177e4SLinus Torvalds if (th->t_trans_id != journal->j_trans_id) { 28621da177e4SLinus Torvalds reiserfs_panic(th->t_super, "journal-1577: handle trans id %ld != current trans id %ld\n", 28631da177e4SLinus Torvalds th->t_trans_id, journal->j_trans_id); 28641da177e4SLinus Torvalds } 28651da177e4SLinus Torvalds 28661da177e4SLinus Torvalds p_s_sb->s_dirt = 1; 28671da177e4SLinus Torvalds 28681da177e4SLinus Torvalds prepared = test_clear_buffer_journal_prepared (bh); 28691da177e4SLinus Torvalds clear_buffer_journal_restore_dirty (bh); 28701da177e4SLinus Torvalds /* already in this transaction, we are done */ 28711da177e4SLinus Torvalds if (buffer_journaled(bh)) { 28721da177e4SLinus Torvalds PROC_INFO_INC( p_s_sb, journal.mark_dirty_already ); 28731da177e4SLinus Torvalds return 0 ; 28741da177e4SLinus Torvalds } 28751da177e4SLinus Torvalds 28761da177e4SLinus Torvalds /* this must be turned into a panic instead of a warning. We can't allow 28771da177e4SLinus Torvalds ** a dirty or journal_dirty or locked buffer to be logged, as some changes 28781da177e4SLinus Torvalds ** could get to disk too early. NOT GOOD. 28791da177e4SLinus Torvalds */ 28801da177e4SLinus Torvalds if (!prepared || buffer_dirty(bh)) { 28811da177e4SLinus Torvalds reiserfs_warning (p_s_sb, "journal-1777: buffer %llu bad state " 28821da177e4SLinus Torvalds "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT", 28831da177e4SLinus Torvalds (unsigned long long)bh->b_blocknr, prepared ? ' ' : '!', 28841da177e4SLinus Torvalds buffer_locked(bh) ? ' ' : '!', 28851da177e4SLinus Torvalds buffer_dirty(bh) ? ' ' : '!', 28861da177e4SLinus Torvalds buffer_journal_dirty(bh) ? ' ' : '!') ; 28871da177e4SLinus Torvalds } 28881da177e4SLinus Torvalds 28891da177e4SLinus Torvalds if (atomic_read(&(journal->j_wcount)) <= 0) { 28901da177e4SLinus Torvalds reiserfs_warning (p_s_sb, "journal-1409: journal_mark_dirty returning because j_wcount was %d", atomic_read(&(journal->j_wcount))) ; 28911da177e4SLinus Torvalds return 1 ; 28921da177e4SLinus Torvalds } 28931da177e4SLinus Torvalds /* this error means I've screwed up, and we've overflowed the transaction. 28941da177e4SLinus Torvalds ** Nothing can be done here, except make the FS readonly or panic. 28951da177e4SLinus Torvalds */ 28961da177e4SLinus Torvalds if (journal->j_len >= journal->j_trans_max) { 28971da177e4SLinus Torvalds reiserfs_panic(th->t_super, "journal-1413: journal_mark_dirty: j_len (%lu) is too big\n", journal->j_len) ; 28981da177e4SLinus Torvalds } 28991da177e4SLinus Torvalds 29001da177e4SLinus Torvalds if (buffer_journal_dirty(bh)) { 29011da177e4SLinus Torvalds count_already_incd = 1 ; 29021da177e4SLinus Torvalds PROC_INFO_INC( p_s_sb, journal.mark_dirty_notjournal ); 29031da177e4SLinus Torvalds clear_buffer_journal_dirty (bh); 29041da177e4SLinus Torvalds } 29051da177e4SLinus Torvalds 29061da177e4SLinus Torvalds if (journal->j_len > journal->j_len_alloc) { 29071da177e4SLinus Torvalds journal->j_len_alloc = journal->j_len + JOURNAL_PER_BALANCE_CNT ; 29081da177e4SLinus Torvalds } 29091da177e4SLinus Torvalds 29101da177e4SLinus Torvalds set_buffer_journaled (bh); 29111da177e4SLinus Torvalds 29121da177e4SLinus Torvalds /* now put this guy on the end */ 29131da177e4SLinus Torvalds if (!cn) { 29141da177e4SLinus Torvalds cn = get_cnode(p_s_sb) ; 29151da177e4SLinus Torvalds if (!cn) { 29161da177e4SLinus Torvalds reiserfs_panic(p_s_sb, "get_cnode failed!\n"); 29171da177e4SLinus Torvalds } 29181da177e4SLinus Torvalds 29191da177e4SLinus Torvalds if (th->t_blocks_logged == th->t_blocks_allocated) { 29201da177e4SLinus Torvalds th->t_blocks_allocated += JOURNAL_PER_BALANCE_CNT ; 29211da177e4SLinus Torvalds journal->j_len_alloc += JOURNAL_PER_BALANCE_CNT ; 29221da177e4SLinus Torvalds } 29231da177e4SLinus Torvalds th->t_blocks_logged++ ; 29241da177e4SLinus Torvalds journal->j_len++ ; 29251da177e4SLinus Torvalds 29261da177e4SLinus Torvalds cn->bh = bh ; 29271da177e4SLinus Torvalds cn->blocknr = bh->b_blocknr ; 29281da177e4SLinus Torvalds cn->sb = p_s_sb; 29291da177e4SLinus Torvalds cn->jlist = NULL ; 29301da177e4SLinus Torvalds insert_journal_hash(journal->j_hash_table, cn) ; 29311da177e4SLinus Torvalds if (!count_already_incd) { 29321da177e4SLinus Torvalds get_bh(bh) ; 29331da177e4SLinus Torvalds } 29341da177e4SLinus Torvalds } 29351da177e4SLinus Torvalds cn->next = NULL ; 29361da177e4SLinus Torvalds cn->prev = journal->j_last ; 29371da177e4SLinus Torvalds cn->bh = bh ; 29381da177e4SLinus Torvalds if (journal->j_last) { 29391da177e4SLinus Torvalds journal->j_last->next = cn ; 29401da177e4SLinus Torvalds journal->j_last = cn ; 29411da177e4SLinus Torvalds } else { 29421da177e4SLinus Torvalds journal->j_first = cn ; 29431da177e4SLinus Torvalds journal->j_last = cn ; 29441da177e4SLinus Torvalds } 29451da177e4SLinus Torvalds return 0 ; 29461da177e4SLinus Torvalds } 29471da177e4SLinus Torvalds 29481da177e4SLinus Torvalds int journal_end(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, unsigned long nblocks) { 29491da177e4SLinus Torvalds if (!current->journal_info && th->t_refcount > 1) 29501da177e4SLinus Torvalds reiserfs_warning (p_s_sb, "REISER-NESTING: th NULL, refcount %d", 29511da177e4SLinus Torvalds th->t_refcount); 29521da177e4SLinus Torvalds 29531da177e4SLinus Torvalds if (!th->t_trans_id) { 29541da177e4SLinus Torvalds WARN_ON (1); 29551da177e4SLinus Torvalds return -EIO; 29561da177e4SLinus Torvalds } 29571da177e4SLinus Torvalds 29581da177e4SLinus Torvalds th->t_refcount--; 29591da177e4SLinus Torvalds if (th->t_refcount > 0) { 29601da177e4SLinus Torvalds struct reiserfs_transaction_handle *cur_th = current->journal_info ; 29611da177e4SLinus Torvalds 29621da177e4SLinus Torvalds /* we aren't allowed to close a nested transaction on a different 29631da177e4SLinus Torvalds ** filesystem from the one in the task struct 29641da177e4SLinus Torvalds */ 29651da177e4SLinus Torvalds if (cur_th->t_super != th->t_super) 29661da177e4SLinus Torvalds BUG() ; 29671da177e4SLinus Torvalds 29681da177e4SLinus Torvalds if (th != cur_th) { 29691da177e4SLinus Torvalds memcpy(current->journal_info, th, sizeof(*th)); 29701da177e4SLinus Torvalds th->t_trans_id = 0; 29711da177e4SLinus Torvalds } 29721da177e4SLinus Torvalds return 0; 29731da177e4SLinus Torvalds } else { 29741da177e4SLinus Torvalds return do_journal_end(th, p_s_sb, nblocks, 0) ; 29751da177e4SLinus Torvalds } 29761da177e4SLinus Torvalds } 29771da177e4SLinus Torvalds 29781da177e4SLinus Torvalds /* removes from the current transaction, relsing and descrementing any counters. 29791da177e4SLinus Torvalds ** also files the removed buffer directly onto the clean list 29801da177e4SLinus Torvalds ** 29811da177e4SLinus Torvalds ** called by journal_mark_freed when a block has been deleted 29821da177e4SLinus Torvalds ** 29831da177e4SLinus Torvalds ** returns 1 if it cleaned and relsed the buffer. 0 otherwise 29841da177e4SLinus Torvalds */ 29851da177e4SLinus Torvalds static int remove_from_transaction(struct super_block *p_s_sb, b_blocknr_t blocknr, int already_cleaned) { 29861da177e4SLinus Torvalds struct buffer_head *bh ; 29871da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn ; 29881da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 29891da177e4SLinus Torvalds int ret = 0; 29901da177e4SLinus Torvalds 29911da177e4SLinus Torvalds cn = get_journal_hash_dev(p_s_sb, journal->j_hash_table, blocknr) ; 29921da177e4SLinus Torvalds if (!cn || !cn->bh) { 29931da177e4SLinus Torvalds return ret ; 29941da177e4SLinus Torvalds } 29951da177e4SLinus Torvalds bh = cn->bh ; 29961da177e4SLinus Torvalds if (cn->prev) { 29971da177e4SLinus Torvalds cn->prev->next = cn->next ; 29981da177e4SLinus Torvalds } 29991da177e4SLinus Torvalds if (cn->next) { 30001da177e4SLinus Torvalds cn->next->prev = cn->prev ; 30011da177e4SLinus Torvalds } 30021da177e4SLinus Torvalds if (cn == journal->j_first) { 30031da177e4SLinus Torvalds journal->j_first = cn->next ; 30041da177e4SLinus Torvalds } 30051da177e4SLinus Torvalds if (cn == journal->j_last) { 30061da177e4SLinus Torvalds journal->j_last = cn->prev ; 30071da177e4SLinus Torvalds } 30081da177e4SLinus Torvalds if (bh) 30091da177e4SLinus Torvalds remove_journal_hash(p_s_sb, journal->j_hash_table, NULL, bh->b_blocknr, 0) ; 30101da177e4SLinus Torvalds clear_buffer_journaled (bh); /* don't log this one */ 30111da177e4SLinus Torvalds 30121da177e4SLinus Torvalds if (!already_cleaned) { 30131da177e4SLinus Torvalds clear_buffer_journal_dirty (bh); 30141da177e4SLinus Torvalds clear_buffer_dirty(bh); 30151da177e4SLinus Torvalds clear_buffer_journal_test (bh); 30161da177e4SLinus Torvalds put_bh(bh) ; 30171da177e4SLinus Torvalds if (atomic_read(&(bh->b_count)) < 0) { 30181da177e4SLinus Torvalds reiserfs_warning (p_s_sb, "journal-1752: remove from trans, b_count < 0"); 30191da177e4SLinus Torvalds } 30201da177e4SLinus Torvalds ret = 1 ; 30211da177e4SLinus Torvalds } 30221da177e4SLinus Torvalds journal->j_len-- ; 30231da177e4SLinus Torvalds journal->j_len_alloc-- ; 30241da177e4SLinus Torvalds free_cnode(p_s_sb, cn) ; 30251da177e4SLinus Torvalds return ret ; 30261da177e4SLinus Torvalds } 30271da177e4SLinus Torvalds 30281da177e4SLinus Torvalds /* 30291da177e4SLinus Torvalds ** for any cnode in a journal list, it can only be dirtied of all the 30301da177e4SLinus Torvalds ** transactions that include it are commited to disk. 30311da177e4SLinus Torvalds ** this checks through each transaction, and returns 1 if you are allowed to dirty, 30321da177e4SLinus Torvalds ** and 0 if you aren't 30331da177e4SLinus Torvalds ** 30341da177e4SLinus Torvalds ** it is called by dirty_journal_list, which is called after flush_commit_list has gotten all the log 30351da177e4SLinus Torvalds ** blocks for a given transaction on disk 30361da177e4SLinus Torvalds ** 30371da177e4SLinus Torvalds */ 30381da177e4SLinus Torvalds static int can_dirty(struct reiserfs_journal_cnode *cn) { 30391da177e4SLinus Torvalds struct super_block *sb = cn->sb; 30401da177e4SLinus Torvalds b_blocknr_t blocknr = cn->blocknr ; 30411da177e4SLinus Torvalds struct reiserfs_journal_cnode *cur = cn->hprev ; 30421da177e4SLinus Torvalds int can_dirty = 1 ; 30431da177e4SLinus Torvalds 30441da177e4SLinus Torvalds /* first test hprev. These are all newer than cn, so any node here 30451da177e4SLinus Torvalds ** with the same block number and dev means this node can't be sent 30461da177e4SLinus Torvalds ** to disk right now. 30471da177e4SLinus Torvalds */ 30481da177e4SLinus Torvalds while(cur && can_dirty) { 30491da177e4SLinus Torvalds if (cur->jlist && cur->bh && cur->blocknr && cur->sb == sb && 30501da177e4SLinus Torvalds cur->blocknr == blocknr) { 30511da177e4SLinus Torvalds can_dirty = 0 ; 30521da177e4SLinus Torvalds } 30531da177e4SLinus Torvalds cur = cur->hprev ; 30541da177e4SLinus Torvalds } 30551da177e4SLinus Torvalds /* then test hnext. These are all older than cn. As long as they 30561da177e4SLinus Torvalds ** are committed to the log, it is safe to write cn to disk 30571da177e4SLinus Torvalds */ 30581da177e4SLinus Torvalds cur = cn->hnext ; 30591da177e4SLinus Torvalds while(cur && can_dirty) { 30601da177e4SLinus Torvalds if (cur->jlist && cur->jlist->j_len > 0 && 30611da177e4SLinus Torvalds atomic_read(&(cur->jlist->j_commit_left)) > 0 && cur->bh && 30621da177e4SLinus Torvalds cur->blocknr && cur->sb == sb && cur->blocknr == blocknr) { 30631da177e4SLinus Torvalds can_dirty = 0 ; 30641da177e4SLinus Torvalds } 30651da177e4SLinus Torvalds cur = cur->hnext ; 30661da177e4SLinus Torvalds } 30671da177e4SLinus Torvalds return can_dirty ; 30681da177e4SLinus Torvalds } 30691da177e4SLinus Torvalds 30701da177e4SLinus Torvalds /* syncs the commit blocks, but does not force the real buffers to disk 30711da177e4SLinus Torvalds ** will wait until the current transaction is done/commited before returning 30721da177e4SLinus Torvalds */ 30731da177e4SLinus Torvalds int journal_end_sync(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, unsigned long nblocks) { 30741da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 30751da177e4SLinus Torvalds 30761da177e4SLinus Torvalds BUG_ON (!th->t_trans_id); 30771da177e4SLinus Torvalds /* you can sync while nested, very, very bad */ 30781da177e4SLinus Torvalds if (th->t_refcount > 1) { 30791da177e4SLinus Torvalds BUG() ; 30801da177e4SLinus Torvalds } 30811da177e4SLinus Torvalds if (journal->j_len == 0) { 30821da177e4SLinus Torvalds reiserfs_prepare_for_journal(p_s_sb, SB_BUFFER_WITH_SB(p_s_sb), 1) ; 30831da177e4SLinus Torvalds journal_mark_dirty(th, p_s_sb, SB_BUFFER_WITH_SB(p_s_sb)) ; 30841da177e4SLinus Torvalds } 30851da177e4SLinus Torvalds return do_journal_end(th, p_s_sb, nblocks, COMMIT_NOW | WAIT) ; 30861da177e4SLinus Torvalds } 30871da177e4SLinus Torvalds 30881da177e4SLinus Torvalds /* 30891da177e4SLinus Torvalds ** writeback the pending async commits to disk 30901da177e4SLinus Torvalds */ 30911da177e4SLinus Torvalds static void flush_async_commits(void *p) { 30921da177e4SLinus Torvalds struct super_block *p_s_sb = p; 30931da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 30941da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 30951da177e4SLinus Torvalds struct list_head *entry; 30961da177e4SLinus Torvalds 30971da177e4SLinus Torvalds lock_kernel(); 30981da177e4SLinus Torvalds if (!list_empty(&journal->j_journal_list)) { 30991da177e4SLinus Torvalds /* last entry is the youngest, commit it and you get everything */ 31001da177e4SLinus Torvalds entry = journal->j_journal_list.prev; 31011da177e4SLinus Torvalds jl = JOURNAL_LIST_ENTRY(entry); 31021da177e4SLinus Torvalds flush_commit_list(p_s_sb, jl, 1); 31031da177e4SLinus Torvalds } 31041da177e4SLinus Torvalds unlock_kernel(); 31051da177e4SLinus Torvalds /* 31061da177e4SLinus Torvalds * this is a little racey, but there's no harm in missing 31071da177e4SLinus Torvalds * the filemap_fdata_write 31081da177e4SLinus Torvalds */ 31091da177e4SLinus Torvalds if (!atomic_read(&journal->j_async_throttle) && !reiserfs_is_journal_aborted (journal)) { 31101da177e4SLinus Torvalds atomic_inc(&journal->j_async_throttle); 31111da177e4SLinus Torvalds filemap_fdatawrite(p_s_sb->s_bdev->bd_inode->i_mapping); 31121da177e4SLinus Torvalds atomic_dec(&journal->j_async_throttle); 31131da177e4SLinus Torvalds } 31141da177e4SLinus Torvalds } 31151da177e4SLinus Torvalds 31161da177e4SLinus Torvalds /* 31171da177e4SLinus Torvalds ** flushes any old transactions to disk 31181da177e4SLinus Torvalds ** ends the current transaction if it is too old 31191da177e4SLinus Torvalds */ 31201da177e4SLinus Torvalds int reiserfs_flush_old_commits(struct super_block *p_s_sb) { 31211da177e4SLinus Torvalds time_t now ; 31221da177e4SLinus Torvalds struct reiserfs_transaction_handle th ; 31231da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 31241da177e4SLinus Torvalds 31251da177e4SLinus Torvalds now = get_seconds(); 31261da177e4SLinus Torvalds /* safety check so we don't flush while we are replaying the log during 31271da177e4SLinus Torvalds * mount 31281da177e4SLinus Torvalds */ 31291da177e4SLinus Torvalds if (list_empty(&journal->j_journal_list)) { 31301da177e4SLinus Torvalds return 0 ; 31311da177e4SLinus Torvalds } 31321da177e4SLinus Torvalds 31331da177e4SLinus Torvalds /* check the current transaction. If there are no writers, and it is 31341da177e4SLinus Torvalds * too old, finish it, and force the commit blocks to disk 31351da177e4SLinus Torvalds */ 31361da177e4SLinus Torvalds if (atomic_read(&journal->j_wcount) <= 0 && 31371da177e4SLinus Torvalds journal->j_trans_start_time > 0 && 31381da177e4SLinus Torvalds journal->j_len > 0 && 31391da177e4SLinus Torvalds (now - journal->j_trans_start_time) > journal->j_max_trans_age) 31401da177e4SLinus Torvalds { 31411da177e4SLinus Torvalds if (!journal_join(&th, p_s_sb, 1)) { 31421da177e4SLinus Torvalds reiserfs_prepare_for_journal(p_s_sb, SB_BUFFER_WITH_SB(p_s_sb), 1) ; 31431da177e4SLinus Torvalds journal_mark_dirty(&th, p_s_sb, SB_BUFFER_WITH_SB(p_s_sb)) ; 31441da177e4SLinus Torvalds 31451da177e4SLinus Torvalds /* we're only being called from kreiserfsd, it makes no sense to do 31461da177e4SLinus Torvalds ** an async commit so that kreiserfsd can do it later 31471da177e4SLinus Torvalds */ 31481da177e4SLinus Torvalds do_journal_end(&th, p_s_sb,1, COMMIT_NOW | WAIT) ; 31491da177e4SLinus Torvalds } 31501da177e4SLinus Torvalds } 31511da177e4SLinus Torvalds return p_s_sb->s_dirt; 31521da177e4SLinus Torvalds } 31531da177e4SLinus Torvalds 31541da177e4SLinus Torvalds /* 31551da177e4SLinus Torvalds ** returns 0 if do_journal_end should return right away, returns 1 if do_journal_end should finish the commit 31561da177e4SLinus Torvalds ** 31571da177e4SLinus Torvalds ** if the current transaction is too old, but still has writers, this will wait on j_join_wait until all 31581da177e4SLinus Torvalds ** the writers are done. By the time it wakes up, the transaction it was called has already ended, so it just 31591da177e4SLinus Torvalds ** flushes the commit list and returns 0. 31601da177e4SLinus Torvalds ** 31611da177e4SLinus Torvalds ** Won't batch when flush or commit_now is set. Also won't batch when others are waiting on j_join_wait. 31621da177e4SLinus Torvalds ** 31631da177e4SLinus Torvalds ** Note, we can't allow the journal_end to proceed while there are still writers in the log. 31641da177e4SLinus Torvalds */ 31651da177e4SLinus Torvalds static int check_journal_end(struct reiserfs_transaction_handle *th, struct super_block * p_s_sb, 31661da177e4SLinus Torvalds unsigned long nblocks, int flags) { 31671da177e4SLinus Torvalds 31681da177e4SLinus Torvalds time_t now ; 31691da177e4SLinus Torvalds int flush = flags & FLUSH_ALL ; 31701da177e4SLinus Torvalds int commit_now = flags & COMMIT_NOW ; 31711da177e4SLinus Torvalds int wait_on_commit = flags & WAIT ; 31721da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 31731da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 31741da177e4SLinus Torvalds 31751da177e4SLinus Torvalds BUG_ON (!th->t_trans_id); 31761da177e4SLinus Torvalds 31771da177e4SLinus Torvalds if (th->t_trans_id != journal->j_trans_id) { 31781da177e4SLinus Torvalds reiserfs_panic(th->t_super, "journal-1577: handle trans id %ld != current trans id %ld\n", 31791da177e4SLinus Torvalds th->t_trans_id, journal->j_trans_id); 31801da177e4SLinus Torvalds } 31811da177e4SLinus Torvalds 31821da177e4SLinus Torvalds journal->j_len_alloc -= (th->t_blocks_allocated - th->t_blocks_logged) ; 31831da177e4SLinus Torvalds if (atomic_read(&(journal->j_wcount)) > 0) { /* <= 0 is allowed. unmounting might not call begin */ 31841da177e4SLinus Torvalds atomic_dec(&(journal->j_wcount)) ; 31851da177e4SLinus Torvalds } 31861da177e4SLinus Torvalds 31871da177e4SLinus Torvalds /* BUG, deal with case where j_len is 0, but people previously freed blocks need to be released 31881da177e4SLinus Torvalds ** will be dealt with by next transaction that actually writes something, but should be taken 31891da177e4SLinus Torvalds ** care of in this trans 31901da177e4SLinus Torvalds */ 31911da177e4SLinus Torvalds if (journal->j_len == 0) { 31921da177e4SLinus Torvalds BUG(); 31931da177e4SLinus Torvalds } 31941da177e4SLinus Torvalds /* if wcount > 0, and we are called to with flush or commit_now, 31951da177e4SLinus Torvalds ** we wait on j_join_wait. We will wake up when the last writer has 31961da177e4SLinus Torvalds ** finished the transaction, and started it on its way to the disk. 31971da177e4SLinus Torvalds ** Then, we flush the commit or journal list, and just return 0 31981da177e4SLinus Torvalds ** because the rest of journal end was already done for this transaction. 31991da177e4SLinus Torvalds */ 32001da177e4SLinus Torvalds if (atomic_read(&(journal->j_wcount)) > 0) { 32011da177e4SLinus Torvalds if (flush || commit_now) { 32021da177e4SLinus Torvalds unsigned trans_id ; 32031da177e4SLinus Torvalds 32041da177e4SLinus Torvalds jl = journal->j_current_jl; 32051da177e4SLinus Torvalds trans_id = jl->j_trans_id; 32061da177e4SLinus Torvalds if (wait_on_commit) 32071da177e4SLinus Torvalds jl->j_state |= LIST_COMMIT_PENDING; 32081da177e4SLinus Torvalds atomic_set(&(journal->j_jlock), 1) ; 32091da177e4SLinus Torvalds if (flush) { 32101da177e4SLinus Torvalds journal->j_next_full_flush = 1 ; 32111da177e4SLinus Torvalds } 32121da177e4SLinus Torvalds unlock_journal(p_s_sb) ; 32131da177e4SLinus Torvalds 32141da177e4SLinus Torvalds /* sleep while the current transaction is still j_jlocked */ 32151da177e4SLinus Torvalds while(journal->j_trans_id == trans_id) { 32161da177e4SLinus Torvalds if (atomic_read(&journal->j_jlock)) { 32171da177e4SLinus Torvalds queue_log_writer(p_s_sb); 32181da177e4SLinus Torvalds } else { 32191da177e4SLinus Torvalds lock_journal(p_s_sb); 32201da177e4SLinus Torvalds if (journal->j_trans_id == trans_id) { 32211da177e4SLinus Torvalds atomic_set(&(journal->j_jlock), 1) ; 32221da177e4SLinus Torvalds } 32231da177e4SLinus Torvalds unlock_journal(p_s_sb); 32241da177e4SLinus Torvalds } 32251da177e4SLinus Torvalds } 32261da177e4SLinus Torvalds if (journal->j_trans_id == trans_id) { 32271da177e4SLinus Torvalds BUG(); 32281da177e4SLinus Torvalds } 32291da177e4SLinus Torvalds if (commit_now && journal_list_still_alive(p_s_sb, trans_id) && 32301da177e4SLinus Torvalds wait_on_commit) 32311da177e4SLinus Torvalds { 32321da177e4SLinus Torvalds flush_commit_list(p_s_sb, jl, 1) ; 32331da177e4SLinus Torvalds } 32341da177e4SLinus Torvalds return 0 ; 32351da177e4SLinus Torvalds } 32361da177e4SLinus Torvalds unlock_journal(p_s_sb) ; 32371da177e4SLinus Torvalds return 0 ; 32381da177e4SLinus Torvalds } 32391da177e4SLinus Torvalds 32401da177e4SLinus Torvalds /* deal with old transactions where we are the last writers */ 32411da177e4SLinus Torvalds now = get_seconds(); 32421da177e4SLinus Torvalds if ((now - journal->j_trans_start_time) > journal->j_max_trans_age) { 32431da177e4SLinus Torvalds commit_now = 1 ; 32441da177e4SLinus Torvalds journal->j_next_async_flush = 1 ; 32451da177e4SLinus Torvalds } 32461da177e4SLinus Torvalds /* don't batch when someone is waiting on j_join_wait */ 32471da177e4SLinus Torvalds /* don't batch when syncing the commit or flushing the whole trans */ 32481da177e4SLinus Torvalds if (!(journal->j_must_wait > 0) && !(atomic_read(&(journal->j_jlock))) && !flush && !commit_now && 32491da177e4SLinus Torvalds (journal->j_len < journal->j_max_batch) && 32501da177e4SLinus Torvalds journal->j_len_alloc < journal->j_max_batch && journal->j_cnode_free > (journal->j_trans_max * 3)) { 32511da177e4SLinus Torvalds journal->j_bcount++ ; 32521da177e4SLinus Torvalds unlock_journal(p_s_sb) ; 32531da177e4SLinus Torvalds return 0 ; 32541da177e4SLinus Torvalds } 32551da177e4SLinus Torvalds 32561da177e4SLinus Torvalds if (journal->j_start > SB_ONDISK_JOURNAL_SIZE(p_s_sb)) { 32571da177e4SLinus Torvalds reiserfs_panic(p_s_sb, "journal-003: journal_end: j_start (%ld) is too high\n", journal->j_start) ; 32581da177e4SLinus Torvalds } 32591da177e4SLinus Torvalds return 1 ; 32601da177e4SLinus Torvalds } 32611da177e4SLinus Torvalds 32621da177e4SLinus Torvalds /* 32631da177e4SLinus Torvalds ** Does all the work that makes deleting blocks safe. 32641da177e4SLinus Torvalds ** when deleting a block mark BH_JNew, just remove it from the current transaction, clean it's buffer_head and move on. 32651da177e4SLinus Torvalds ** 32661da177e4SLinus Torvalds ** otherwise: 32671da177e4SLinus Torvalds ** set a bit for the block in the journal bitmap. That will prevent it from being allocated for unformatted nodes 32681da177e4SLinus Torvalds ** before this transaction has finished. 32691da177e4SLinus Torvalds ** 32701da177e4SLinus Torvalds ** mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers. That will prevent any old transactions with 32711da177e4SLinus Torvalds ** this block from trying to flush to the real location. Since we aren't removing the cnode from the journal_list_hash, 32721da177e4SLinus Torvalds ** the block can't be reallocated yet. 32731da177e4SLinus Torvalds ** 32741da177e4SLinus Torvalds ** Then remove it from the current transaction, decrementing any counters and filing it on the clean list. 32751da177e4SLinus Torvalds */ 32761da177e4SLinus Torvalds int journal_mark_freed(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, b_blocknr_t blocknr) { 32771da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 32781da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn = NULL ; 32791da177e4SLinus Torvalds struct buffer_head *bh = NULL ; 32801da177e4SLinus Torvalds struct reiserfs_list_bitmap *jb = NULL ; 32811da177e4SLinus Torvalds int cleaned = 0 ; 32821da177e4SLinus Torvalds BUG_ON (!th->t_trans_id); 32831da177e4SLinus Torvalds 32841da177e4SLinus Torvalds cn = get_journal_hash_dev(p_s_sb, journal->j_hash_table, blocknr); 32851da177e4SLinus Torvalds if (cn && cn->bh) { 32861da177e4SLinus Torvalds bh = cn->bh ; 32871da177e4SLinus Torvalds get_bh(bh) ; 32881da177e4SLinus Torvalds } 32891da177e4SLinus Torvalds /* if it is journal new, we just remove it from this transaction */ 32901da177e4SLinus Torvalds if (bh && buffer_journal_new(bh)) { 32911da177e4SLinus Torvalds clear_buffer_journal_new (bh); 32921da177e4SLinus Torvalds clear_prepared_bits(bh) ; 32931da177e4SLinus Torvalds reiserfs_clean_and_file_buffer(bh) ; 32941da177e4SLinus Torvalds cleaned = remove_from_transaction(p_s_sb, blocknr, cleaned) ; 32951da177e4SLinus Torvalds } else { 32961da177e4SLinus Torvalds /* set the bit for this block in the journal bitmap for this transaction */ 32971da177e4SLinus Torvalds jb = journal->j_current_jl->j_list_bitmap; 32981da177e4SLinus Torvalds if (!jb) { 32991da177e4SLinus Torvalds reiserfs_panic(p_s_sb, "journal-1702: journal_mark_freed, journal_list_bitmap is NULL\n") ; 33001da177e4SLinus Torvalds } 33011da177e4SLinus Torvalds set_bit_in_list_bitmap(p_s_sb, blocknr, jb) ; 33021da177e4SLinus Torvalds 33031da177e4SLinus Torvalds /* Note, the entire while loop is not allowed to schedule. */ 33041da177e4SLinus Torvalds 33051da177e4SLinus Torvalds if (bh) { 33061da177e4SLinus Torvalds clear_prepared_bits(bh) ; 33071da177e4SLinus Torvalds reiserfs_clean_and_file_buffer(bh) ; 33081da177e4SLinus Torvalds } 33091da177e4SLinus Torvalds cleaned = remove_from_transaction(p_s_sb, blocknr, cleaned) ; 33101da177e4SLinus Torvalds 33111da177e4SLinus Torvalds /* find all older transactions with this block, make sure they don't try to write it out */ 33121da177e4SLinus Torvalds cn = get_journal_hash_dev(p_s_sb,journal->j_list_hash_table, blocknr) ; 33131da177e4SLinus Torvalds while (cn) { 33141da177e4SLinus Torvalds if (p_s_sb == cn->sb && blocknr == cn->blocknr) { 33151da177e4SLinus Torvalds set_bit(BLOCK_FREED, &cn->state) ; 33161da177e4SLinus Torvalds if (cn->bh) { 33171da177e4SLinus Torvalds if (!cleaned) { 33181da177e4SLinus Torvalds /* remove_from_transaction will brelse the buffer if it was 33191da177e4SLinus Torvalds ** in the current trans 33201da177e4SLinus Torvalds */ 33211da177e4SLinus Torvalds clear_buffer_journal_dirty (cn->bh); 33221da177e4SLinus Torvalds clear_buffer_dirty(cn->bh); 33231da177e4SLinus Torvalds clear_buffer_journal_test(cn->bh); 33241da177e4SLinus Torvalds cleaned = 1 ; 33251da177e4SLinus Torvalds put_bh(cn->bh) ; 33261da177e4SLinus Torvalds if (atomic_read(&(cn->bh->b_count)) < 0) { 33271da177e4SLinus Torvalds reiserfs_warning (p_s_sb, "journal-2138: cn->bh->b_count < 0"); 33281da177e4SLinus Torvalds } 33291da177e4SLinus Torvalds } 33301da177e4SLinus Torvalds if (cn->jlist) { /* since we are clearing the bh, we MUST dec nonzerolen */ 33311da177e4SLinus Torvalds atomic_dec(&(cn->jlist->j_nonzerolen)) ; 33321da177e4SLinus Torvalds } 33331da177e4SLinus Torvalds cn->bh = NULL ; 33341da177e4SLinus Torvalds } 33351da177e4SLinus Torvalds } 33361da177e4SLinus Torvalds cn = cn->hnext ; 33371da177e4SLinus Torvalds } 33381da177e4SLinus Torvalds } 33391da177e4SLinus Torvalds 33401da177e4SLinus Torvalds if (bh) { 33411da177e4SLinus Torvalds put_bh(bh) ; /* get_hash grabs the buffer */ 33421da177e4SLinus Torvalds if (atomic_read(&(bh->b_count)) < 0) { 33431da177e4SLinus Torvalds reiserfs_warning (p_s_sb, "journal-2165: bh->b_count < 0"); 33441da177e4SLinus Torvalds } 33451da177e4SLinus Torvalds } 33461da177e4SLinus Torvalds return 0 ; 33471da177e4SLinus Torvalds } 33481da177e4SLinus Torvalds 33491da177e4SLinus Torvalds void reiserfs_update_inode_transaction(struct inode *inode) { 33501da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (inode->i_sb); 33511da177e4SLinus Torvalds REISERFS_I(inode)->i_jl = journal->j_current_jl; 33521da177e4SLinus Torvalds REISERFS_I(inode)->i_trans_id = journal->j_trans_id ; 33531da177e4SLinus Torvalds } 33541da177e4SLinus Torvalds 33551da177e4SLinus Torvalds /* 33561da177e4SLinus Torvalds * returns -1 on error, 0 if no commits/barriers were done and 1 33571da177e4SLinus Torvalds * if a transaction was actually committed and the barrier was done 33581da177e4SLinus Torvalds */ 33591da177e4SLinus Torvalds static int __commit_trans_jl(struct inode *inode, unsigned long id, 33601da177e4SLinus Torvalds struct reiserfs_journal_list *jl) 33611da177e4SLinus Torvalds { 33621da177e4SLinus Torvalds struct reiserfs_transaction_handle th ; 33631da177e4SLinus Torvalds struct super_block *sb = inode->i_sb ; 33641da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (sb); 33651da177e4SLinus Torvalds int ret = 0; 33661da177e4SLinus Torvalds 33671da177e4SLinus Torvalds /* is it from the current transaction, or from an unknown transaction? */ 33681da177e4SLinus Torvalds if (id == journal->j_trans_id) { 33691da177e4SLinus Torvalds jl = journal->j_current_jl; 33701da177e4SLinus Torvalds /* try to let other writers come in and grow this transaction */ 33711da177e4SLinus Torvalds let_transaction_grow(sb, id); 33721da177e4SLinus Torvalds if (journal->j_trans_id != id) { 33731da177e4SLinus Torvalds goto flush_commit_only; 33741da177e4SLinus Torvalds } 33751da177e4SLinus Torvalds 33761da177e4SLinus Torvalds ret = journal_begin(&th, sb, 1) ; 33771da177e4SLinus Torvalds if (ret) 33781da177e4SLinus Torvalds return ret; 33791da177e4SLinus Torvalds 33801da177e4SLinus Torvalds /* someone might have ended this transaction while we joined */ 33811da177e4SLinus Torvalds if (journal->j_trans_id != id) { 33821da177e4SLinus Torvalds reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), 1) ; 33831da177e4SLinus Torvalds journal_mark_dirty(&th, sb, SB_BUFFER_WITH_SB(sb)) ; 33841da177e4SLinus Torvalds ret = journal_end(&th, sb, 1) ; 33851da177e4SLinus Torvalds goto flush_commit_only; 33861da177e4SLinus Torvalds } 33871da177e4SLinus Torvalds 33881da177e4SLinus Torvalds ret = journal_end_sync(&th, sb, 1) ; 33891da177e4SLinus Torvalds if (!ret) 33901da177e4SLinus Torvalds ret = 1; 33911da177e4SLinus Torvalds 33921da177e4SLinus Torvalds } else { 33931da177e4SLinus Torvalds /* this gets tricky, we have to make sure the journal list in 33941da177e4SLinus Torvalds * the inode still exists. We know the list is still around 33951da177e4SLinus Torvalds * if we've got a larger transaction id than the oldest list 33961da177e4SLinus Torvalds */ 33971da177e4SLinus Torvalds flush_commit_only: 33981da177e4SLinus Torvalds if (journal_list_still_alive(inode->i_sb, id)) { 33991da177e4SLinus Torvalds /* 34001da177e4SLinus Torvalds * we only set ret to 1 when we know for sure 34011da177e4SLinus Torvalds * the barrier hasn't been started yet on the commit 34021da177e4SLinus Torvalds * block. 34031da177e4SLinus Torvalds */ 34041da177e4SLinus Torvalds if (atomic_read(&jl->j_commit_left) > 1) 34051da177e4SLinus Torvalds ret = 1; 34061da177e4SLinus Torvalds flush_commit_list(sb, jl, 1) ; 34071da177e4SLinus Torvalds if (journal->j_errno) 34081da177e4SLinus Torvalds ret = journal->j_errno; 34091da177e4SLinus Torvalds } 34101da177e4SLinus Torvalds } 34111da177e4SLinus Torvalds /* otherwise the list is gone, and long since committed */ 34121da177e4SLinus Torvalds return ret; 34131da177e4SLinus Torvalds } 34141da177e4SLinus Torvalds 34151da177e4SLinus Torvalds int reiserfs_commit_for_inode(struct inode *inode) { 34161da177e4SLinus Torvalds unsigned long id = REISERFS_I(inode)->i_trans_id; 34171da177e4SLinus Torvalds struct reiserfs_journal_list *jl = REISERFS_I(inode)->i_jl; 34181da177e4SLinus Torvalds 34191da177e4SLinus Torvalds /* for the whole inode, assume unset id means it was 34201da177e4SLinus Torvalds * changed in the current transaction. More conservative 34211da177e4SLinus Torvalds */ 34221da177e4SLinus Torvalds if (!id || !jl) { 34231da177e4SLinus Torvalds reiserfs_update_inode_transaction(inode) ; 34241da177e4SLinus Torvalds id = REISERFS_I(inode)->i_trans_id; 34251da177e4SLinus Torvalds /* jl will be updated in __commit_trans_jl */ 34261da177e4SLinus Torvalds } 34271da177e4SLinus Torvalds 34281da177e4SLinus Torvalds return __commit_trans_jl(inode, id, jl); 34291da177e4SLinus Torvalds } 34301da177e4SLinus Torvalds 34311da177e4SLinus Torvalds void reiserfs_restore_prepared_buffer(struct super_block *p_s_sb, 34321da177e4SLinus Torvalds struct buffer_head *bh) { 34331da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 34341da177e4SLinus Torvalds PROC_INFO_INC( p_s_sb, journal.restore_prepared ); 34351da177e4SLinus Torvalds if (!bh) { 34361da177e4SLinus Torvalds return ; 34371da177e4SLinus Torvalds } 34381da177e4SLinus Torvalds if (test_clear_buffer_journal_restore_dirty (bh) && 34391da177e4SLinus Torvalds buffer_journal_dirty(bh)) { 34401da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn; 34411da177e4SLinus Torvalds cn = get_journal_hash_dev(p_s_sb, 34421da177e4SLinus Torvalds journal->j_list_hash_table, 34431da177e4SLinus Torvalds bh->b_blocknr); 34441da177e4SLinus Torvalds if (cn && can_dirty(cn)) { 34451da177e4SLinus Torvalds set_buffer_journal_test (bh); 34461da177e4SLinus Torvalds mark_buffer_dirty(bh); 34471da177e4SLinus Torvalds } 34481da177e4SLinus Torvalds } 34491da177e4SLinus Torvalds clear_buffer_journal_prepared (bh); 34501da177e4SLinus Torvalds } 34511da177e4SLinus Torvalds 34521da177e4SLinus Torvalds extern struct tree_balance *cur_tb ; 34531da177e4SLinus Torvalds /* 34541da177e4SLinus Torvalds ** before we can change a metadata block, we have to make sure it won't 34551da177e4SLinus Torvalds ** be written to disk while we are altering it. So, we must: 34561da177e4SLinus Torvalds ** clean it 34571da177e4SLinus Torvalds ** wait on it. 34581da177e4SLinus Torvalds ** 34591da177e4SLinus Torvalds */ 34601da177e4SLinus Torvalds int reiserfs_prepare_for_journal(struct super_block *p_s_sb, 34611da177e4SLinus Torvalds struct buffer_head *bh, int wait) { 34621da177e4SLinus Torvalds PROC_INFO_INC( p_s_sb, journal.prepare ); 34631da177e4SLinus Torvalds 34641da177e4SLinus Torvalds if (test_set_buffer_locked(bh)) { 34651da177e4SLinus Torvalds if (!wait) 34661da177e4SLinus Torvalds return 0; 34671da177e4SLinus Torvalds lock_buffer(bh); 34681da177e4SLinus Torvalds } 34691da177e4SLinus Torvalds set_buffer_journal_prepared (bh); 34701da177e4SLinus Torvalds if (test_clear_buffer_dirty(bh) && buffer_journal_dirty(bh)) { 34711da177e4SLinus Torvalds clear_buffer_journal_test (bh); 34721da177e4SLinus Torvalds set_buffer_journal_restore_dirty (bh); 34731da177e4SLinus Torvalds } 34741da177e4SLinus Torvalds unlock_buffer(bh); 34751da177e4SLinus Torvalds return 1; 34761da177e4SLinus Torvalds } 34771da177e4SLinus Torvalds 34781da177e4SLinus Torvalds static void flush_old_journal_lists(struct super_block *s) { 34791da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (s); 34801da177e4SLinus Torvalds struct reiserfs_journal_list *jl; 34811da177e4SLinus Torvalds struct list_head *entry; 34821da177e4SLinus Torvalds time_t now = get_seconds(); 34831da177e4SLinus Torvalds 34841da177e4SLinus Torvalds while(!list_empty(&journal->j_journal_list)) { 34851da177e4SLinus Torvalds entry = journal->j_journal_list.next; 34861da177e4SLinus Torvalds jl = JOURNAL_LIST_ENTRY(entry); 34871da177e4SLinus Torvalds /* this check should always be run, to send old lists to disk */ 34881da177e4SLinus Torvalds if (jl->j_timestamp < (now - (JOURNAL_MAX_TRANS_AGE * 4))) { 34891da177e4SLinus Torvalds flush_used_journal_lists(s, jl); 34901da177e4SLinus Torvalds } else { 34911da177e4SLinus Torvalds break; 34921da177e4SLinus Torvalds } 34931da177e4SLinus Torvalds } 34941da177e4SLinus Torvalds } 34951da177e4SLinus Torvalds 34961da177e4SLinus Torvalds /* 34971da177e4SLinus Torvalds ** long and ugly. If flush, will not return until all commit 34981da177e4SLinus Torvalds ** blocks and all real buffers in the trans are on disk. 34991da177e4SLinus Torvalds ** If no_async, won't return until all commit blocks are on disk. 35001da177e4SLinus Torvalds ** 35011da177e4SLinus Torvalds ** keep reading, there are comments as you go along 35021da177e4SLinus Torvalds ** 35031da177e4SLinus Torvalds ** If the journal is aborted, we just clean up. Things like flushing 35041da177e4SLinus Torvalds ** journal lists, etc just won't happen. 35051da177e4SLinus Torvalds */ 35061da177e4SLinus Torvalds static int do_journal_end(struct reiserfs_transaction_handle *th, struct super_block * p_s_sb, unsigned long nblocks, 35071da177e4SLinus Torvalds int flags) { 35081da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); 35091da177e4SLinus Torvalds struct reiserfs_journal_cnode *cn, *next, *jl_cn; 35101da177e4SLinus Torvalds struct reiserfs_journal_cnode *last_cn = NULL; 35111da177e4SLinus Torvalds struct reiserfs_journal_desc *desc ; 35121da177e4SLinus Torvalds struct reiserfs_journal_commit *commit ; 35131da177e4SLinus Torvalds struct buffer_head *c_bh ; /* commit bh */ 35141da177e4SLinus Torvalds struct buffer_head *d_bh ; /* desc bh */ 35151da177e4SLinus Torvalds int cur_write_start = 0 ; /* start index of current log write */ 35161da177e4SLinus Torvalds int old_start ; 35171da177e4SLinus Torvalds int i ; 35181da177e4SLinus Torvalds int flush = flags & FLUSH_ALL ; 35191da177e4SLinus Torvalds int wait_on_commit = flags & WAIT ; 35201da177e4SLinus Torvalds struct reiserfs_journal_list *jl, *temp_jl; 35211da177e4SLinus Torvalds struct list_head *entry, *safe; 35221da177e4SLinus Torvalds unsigned long jindex; 35231da177e4SLinus Torvalds unsigned long commit_trans_id; 35241da177e4SLinus Torvalds int trans_half; 35251da177e4SLinus Torvalds 35261da177e4SLinus Torvalds BUG_ON (th->t_refcount > 1); 35271da177e4SLinus Torvalds BUG_ON (!th->t_trans_id); 35281da177e4SLinus Torvalds 35291da177e4SLinus Torvalds current->journal_info = th->t_handle_save; 35301da177e4SLinus Torvalds reiserfs_check_lock_depth(p_s_sb, "journal end"); 35311da177e4SLinus Torvalds if (journal->j_len == 0) { 35321da177e4SLinus Torvalds reiserfs_prepare_for_journal(p_s_sb, SB_BUFFER_WITH_SB(p_s_sb), 1) ; 35331da177e4SLinus Torvalds journal_mark_dirty(th, p_s_sb, SB_BUFFER_WITH_SB(p_s_sb)) ; 35341da177e4SLinus Torvalds } 35351da177e4SLinus Torvalds 35361da177e4SLinus Torvalds lock_journal(p_s_sb) ; 35371da177e4SLinus Torvalds if (journal->j_next_full_flush) { 35381da177e4SLinus Torvalds flags |= FLUSH_ALL ; 35391da177e4SLinus Torvalds flush = 1 ; 35401da177e4SLinus Torvalds } 35411da177e4SLinus Torvalds if (journal->j_next_async_flush) { 35421da177e4SLinus Torvalds flags |= COMMIT_NOW | WAIT; 35431da177e4SLinus Torvalds wait_on_commit = 1; 35441da177e4SLinus Torvalds } 35451da177e4SLinus Torvalds 35461da177e4SLinus Torvalds /* check_journal_end locks the journal, and unlocks if it does not return 1 35471da177e4SLinus Torvalds ** it tells us if we should continue with the journal_end, or just return 35481da177e4SLinus Torvalds */ 35491da177e4SLinus Torvalds if (!check_journal_end(th, p_s_sb, nblocks, flags)) { 35501da177e4SLinus Torvalds p_s_sb->s_dirt = 1; 35511da177e4SLinus Torvalds wake_queued_writers(p_s_sb); 35521da177e4SLinus Torvalds reiserfs_async_progress_wait(p_s_sb); 35531da177e4SLinus Torvalds goto out ; 35541da177e4SLinus Torvalds } 35551da177e4SLinus Torvalds 35561da177e4SLinus Torvalds /* check_journal_end might set these, check again */ 35571da177e4SLinus Torvalds if (journal->j_next_full_flush) { 35581da177e4SLinus Torvalds flush = 1 ; 35591da177e4SLinus Torvalds } 35601da177e4SLinus Torvalds 35611da177e4SLinus Torvalds /* 35621da177e4SLinus Torvalds ** j must wait means we have to flush the log blocks, and the real blocks for 35631da177e4SLinus Torvalds ** this transaction 35641da177e4SLinus Torvalds */ 35651da177e4SLinus Torvalds if (journal->j_must_wait > 0) { 35661da177e4SLinus Torvalds flush = 1 ; 35671da177e4SLinus Torvalds } 35681da177e4SLinus Torvalds 35691da177e4SLinus Torvalds #ifdef REISERFS_PREALLOCATE 35701da177e4SLinus Torvalds /* quota ops might need to nest, setup the journal_info pointer for them */ 35711da177e4SLinus Torvalds current->journal_info = th ; 35721da177e4SLinus Torvalds reiserfs_discard_all_prealloc(th); /* it should not involve new blocks into 35731da177e4SLinus Torvalds * the transaction */ 35741da177e4SLinus Torvalds current->journal_info = th->t_handle_save ; 35751da177e4SLinus Torvalds #endif 35761da177e4SLinus Torvalds 35771da177e4SLinus Torvalds /* setup description block */ 35781da177e4SLinus Torvalds d_bh = journal_getblk(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + journal->j_start) ; 35791da177e4SLinus Torvalds set_buffer_uptodate(d_bh); 35801da177e4SLinus Torvalds desc = (struct reiserfs_journal_desc *)(d_bh)->b_data ; 35811da177e4SLinus Torvalds memset(d_bh->b_data, 0, d_bh->b_size) ; 35821da177e4SLinus Torvalds memcpy(get_journal_desc_magic (d_bh), JOURNAL_DESC_MAGIC, 8) ; 35831da177e4SLinus Torvalds set_desc_trans_id(desc, journal->j_trans_id) ; 35841da177e4SLinus Torvalds 35851da177e4SLinus Torvalds /* setup commit block. Don't write (keep it clean too) this one until after everyone else is written */ 35861da177e4SLinus Torvalds c_bh = journal_getblk(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + 35871da177e4SLinus Torvalds ((journal->j_start + journal->j_len + 1) % SB_ONDISK_JOURNAL_SIZE(p_s_sb))) ; 35881da177e4SLinus Torvalds commit = (struct reiserfs_journal_commit *)c_bh->b_data ; 35891da177e4SLinus Torvalds memset(c_bh->b_data, 0, c_bh->b_size) ; 35901da177e4SLinus Torvalds set_commit_trans_id(commit, journal->j_trans_id) ; 35911da177e4SLinus Torvalds set_buffer_uptodate(c_bh) ; 35921da177e4SLinus Torvalds 35931da177e4SLinus Torvalds /* init this journal list */ 35941da177e4SLinus Torvalds jl = journal->j_current_jl; 35951da177e4SLinus Torvalds 35961da177e4SLinus Torvalds /* we lock the commit before doing anything because 35971da177e4SLinus Torvalds * we want to make sure nobody tries to run flush_commit_list until 35981da177e4SLinus Torvalds * the new transaction is fully setup, and we've already flushed the 35991da177e4SLinus Torvalds * ordered bh list 36001da177e4SLinus Torvalds */ 36011da177e4SLinus Torvalds down(&jl->j_commit_lock); 36021da177e4SLinus Torvalds 36031da177e4SLinus Torvalds /* save the transaction id in case we need to commit it later */ 36041da177e4SLinus Torvalds commit_trans_id = jl->j_trans_id; 36051da177e4SLinus Torvalds 36061da177e4SLinus Torvalds atomic_set(&jl->j_older_commits_done, 0) ; 36071da177e4SLinus Torvalds jl->j_trans_id = journal->j_trans_id ; 36081da177e4SLinus Torvalds jl->j_timestamp = journal->j_trans_start_time ; 36091da177e4SLinus Torvalds jl->j_commit_bh = c_bh ; 36101da177e4SLinus Torvalds jl->j_start = journal->j_start ; 36111da177e4SLinus Torvalds jl->j_len = journal->j_len ; 36121da177e4SLinus Torvalds atomic_set(&jl->j_nonzerolen, journal->j_len) ; 36131da177e4SLinus Torvalds atomic_set(&jl->j_commit_left, journal->j_len + 2); 36141da177e4SLinus Torvalds jl->j_realblock = NULL ; 36151da177e4SLinus Torvalds 36161da177e4SLinus Torvalds /* The ENTIRE FOR LOOP MUST not cause schedule to occur. 36171da177e4SLinus Torvalds ** for each real block, add it to the journal list hash, 36181da177e4SLinus Torvalds ** copy into real block index array in the commit or desc block 36191da177e4SLinus Torvalds */ 36201da177e4SLinus Torvalds trans_half = journal_trans_half(p_s_sb->s_blocksize); 36211da177e4SLinus Torvalds for (i = 0, cn = journal->j_first ; cn ; cn = cn->next, i++) { 36221da177e4SLinus Torvalds if (buffer_journaled (cn->bh)) { 36231da177e4SLinus Torvalds jl_cn = get_cnode(p_s_sb) ; 36241da177e4SLinus Torvalds if (!jl_cn) { 36251da177e4SLinus Torvalds reiserfs_panic(p_s_sb, "journal-1676, get_cnode returned NULL\n") ; 36261da177e4SLinus Torvalds } 36271da177e4SLinus Torvalds if (i == 0) { 36281da177e4SLinus Torvalds jl->j_realblock = jl_cn ; 36291da177e4SLinus Torvalds } 36301da177e4SLinus Torvalds jl_cn->prev = last_cn ; 36311da177e4SLinus Torvalds jl_cn->next = NULL ; 36321da177e4SLinus Torvalds if (last_cn) { 36331da177e4SLinus Torvalds last_cn->next = jl_cn ; 36341da177e4SLinus Torvalds } 36351da177e4SLinus Torvalds last_cn = jl_cn ; 36361da177e4SLinus Torvalds /* make sure the block we are trying to log is not a block 36371da177e4SLinus Torvalds of journal or reserved area */ 36381da177e4SLinus Torvalds 36391da177e4SLinus Torvalds if (is_block_in_log_or_reserved_area(p_s_sb, cn->bh->b_blocknr)) { 36401da177e4SLinus Torvalds reiserfs_panic(p_s_sb, "journal-2332: Trying to log block %lu, which is a log block\n", cn->bh->b_blocknr) ; 36411da177e4SLinus Torvalds } 36421da177e4SLinus Torvalds jl_cn->blocknr = cn->bh->b_blocknr ; 36431da177e4SLinus Torvalds jl_cn->state = 0 ; 36441da177e4SLinus Torvalds jl_cn->sb = p_s_sb; 36451da177e4SLinus Torvalds jl_cn->bh = cn->bh ; 36461da177e4SLinus Torvalds jl_cn->jlist = jl; 36471da177e4SLinus Torvalds insert_journal_hash(journal->j_list_hash_table, jl_cn) ; 36481da177e4SLinus Torvalds if (i < trans_half) { 36491da177e4SLinus Torvalds desc->j_realblock[i] = cpu_to_le32(cn->bh->b_blocknr) ; 36501da177e4SLinus Torvalds } else { 36511da177e4SLinus Torvalds commit->j_realblock[i - trans_half] = cpu_to_le32(cn->bh->b_blocknr) ; 36521da177e4SLinus Torvalds } 36531da177e4SLinus Torvalds } else { 36541da177e4SLinus Torvalds i-- ; 36551da177e4SLinus Torvalds } 36561da177e4SLinus Torvalds } 36571da177e4SLinus Torvalds set_desc_trans_len(desc, journal->j_len) ; 36581da177e4SLinus Torvalds set_desc_mount_id(desc, journal->j_mount_id) ; 36591da177e4SLinus Torvalds set_desc_trans_id(desc, journal->j_trans_id) ; 36601da177e4SLinus Torvalds set_commit_trans_len(commit, journal->j_len); 36611da177e4SLinus Torvalds 36621da177e4SLinus Torvalds /* special check in case all buffers in the journal were marked for not logging */ 36631da177e4SLinus Torvalds if (journal->j_len == 0) { 36641da177e4SLinus Torvalds BUG(); 36651da177e4SLinus Torvalds } 36661da177e4SLinus Torvalds 36671da177e4SLinus Torvalds /* we're about to dirty all the log blocks, mark the description block 36681da177e4SLinus Torvalds * dirty now too. Don't mark the commit block dirty until all the 36691da177e4SLinus Torvalds * others are on disk 36701da177e4SLinus Torvalds */ 36711da177e4SLinus Torvalds mark_buffer_dirty(d_bh); 36721da177e4SLinus Torvalds 36731da177e4SLinus Torvalds /* first data block is j_start + 1, so add one to cur_write_start wherever you use it */ 36741da177e4SLinus Torvalds cur_write_start = journal->j_start ; 36751da177e4SLinus Torvalds cn = journal->j_first ; 36761da177e4SLinus Torvalds jindex = 1 ; /* start at one so we don't get the desc again */ 36771da177e4SLinus Torvalds while(cn) { 36781da177e4SLinus Torvalds clear_buffer_journal_new (cn->bh); 36791da177e4SLinus Torvalds /* copy all the real blocks into log area. dirty log blocks */ 36801da177e4SLinus Torvalds if (buffer_journaled (cn->bh)) { 36811da177e4SLinus Torvalds struct buffer_head *tmp_bh ; 36821da177e4SLinus Torvalds char *addr; 36831da177e4SLinus Torvalds struct page *page; 36841da177e4SLinus Torvalds tmp_bh = journal_getblk(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + 36851da177e4SLinus Torvalds ((cur_write_start + jindex) % SB_ONDISK_JOURNAL_SIZE(p_s_sb))) ; 36861da177e4SLinus Torvalds set_buffer_uptodate(tmp_bh); 36871da177e4SLinus Torvalds page = cn->bh->b_page; 36881da177e4SLinus Torvalds addr = kmap(page); 36891da177e4SLinus Torvalds memcpy(tmp_bh->b_data, addr + offset_in_page(cn->bh->b_data), 36901da177e4SLinus Torvalds cn->bh->b_size); 36911da177e4SLinus Torvalds kunmap(page); 36921da177e4SLinus Torvalds mark_buffer_dirty(tmp_bh); 36931da177e4SLinus Torvalds jindex++ ; 36941da177e4SLinus Torvalds set_buffer_journal_dirty (cn->bh); 36951da177e4SLinus Torvalds clear_buffer_journaled (cn->bh); 36961da177e4SLinus Torvalds } else { 36971da177e4SLinus Torvalds /* JDirty cleared sometime during transaction. don't log this one */ 36981da177e4SLinus Torvalds reiserfs_warning(p_s_sb, "journal-2048: do_journal_end: BAD, buffer in journal hash, but not JDirty!") ; 36991da177e4SLinus Torvalds brelse(cn->bh) ; 37001da177e4SLinus Torvalds } 37011da177e4SLinus Torvalds next = cn->next ; 37021da177e4SLinus Torvalds free_cnode(p_s_sb, cn) ; 37031da177e4SLinus Torvalds cn = next ; 37041da177e4SLinus Torvalds cond_resched(); 37051da177e4SLinus Torvalds } 37061da177e4SLinus Torvalds 37071da177e4SLinus Torvalds /* we are done with both the c_bh and d_bh, but 37081da177e4SLinus Torvalds ** c_bh must be written after all other commit blocks, 37091da177e4SLinus Torvalds ** so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1. 37101da177e4SLinus Torvalds */ 37111da177e4SLinus Torvalds 37121da177e4SLinus Torvalds journal->j_current_jl = alloc_journal_list(p_s_sb); 37131da177e4SLinus Torvalds 37141da177e4SLinus Torvalds /* now it is safe to insert this transaction on the main list */ 37151da177e4SLinus Torvalds list_add_tail(&jl->j_list, &journal->j_journal_list); 37161da177e4SLinus Torvalds list_add_tail(&jl->j_working_list, &journal->j_working_list); 37171da177e4SLinus Torvalds journal->j_num_work_lists++; 37181da177e4SLinus Torvalds 37191da177e4SLinus Torvalds /* reset journal values for the next transaction */ 37201da177e4SLinus Torvalds old_start = journal->j_start ; 37211da177e4SLinus Torvalds journal->j_start = (journal->j_start + journal->j_len + 2) % SB_ONDISK_JOURNAL_SIZE(p_s_sb); 37221da177e4SLinus Torvalds atomic_set(&(journal->j_wcount), 0) ; 37231da177e4SLinus Torvalds journal->j_bcount = 0 ; 37241da177e4SLinus Torvalds journal->j_last = NULL ; 37251da177e4SLinus Torvalds journal->j_first = NULL ; 37261da177e4SLinus Torvalds journal->j_len = 0 ; 37271da177e4SLinus Torvalds journal->j_trans_start_time = 0 ; 37281da177e4SLinus Torvalds journal->j_trans_id++ ; 37291da177e4SLinus Torvalds journal->j_current_jl->j_trans_id = journal->j_trans_id; 37301da177e4SLinus Torvalds journal->j_must_wait = 0 ; 37311da177e4SLinus Torvalds journal->j_len_alloc = 0 ; 37321da177e4SLinus Torvalds journal->j_next_full_flush = 0 ; 37331da177e4SLinus Torvalds journal->j_next_async_flush = 0 ; 37341da177e4SLinus Torvalds init_journal_hash(p_s_sb) ; 37351da177e4SLinus Torvalds 37361da177e4SLinus Torvalds // make sure reiserfs_add_jh sees the new current_jl before we 37371da177e4SLinus Torvalds // write out the tails 37381da177e4SLinus Torvalds smp_mb(); 37391da177e4SLinus Torvalds 37401da177e4SLinus Torvalds /* tail conversion targets have to hit the disk before we end the 37411da177e4SLinus Torvalds * transaction. Otherwise a later transaction might repack the tail 37421da177e4SLinus Torvalds * before this transaction commits, leaving the data block unflushed and 37431da177e4SLinus Torvalds * clean, if we crash before the later transaction commits, the data block 37441da177e4SLinus Torvalds * is lost. 37451da177e4SLinus Torvalds */ 37461da177e4SLinus Torvalds if (!list_empty(&jl->j_tail_bh_list)) { 37471da177e4SLinus Torvalds unlock_kernel(); 37481da177e4SLinus Torvalds write_ordered_buffers(&journal->j_dirty_buffers_lock, 37491da177e4SLinus Torvalds journal, jl, &jl->j_tail_bh_list); 37501da177e4SLinus Torvalds lock_kernel(); 37511da177e4SLinus Torvalds } 37521da177e4SLinus Torvalds if (!list_empty(&jl->j_tail_bh_list)) 37531da177e4SLinus Torvalds BUG(); 37541da177e4SLinus Torvalds up(&jl->j_commit_lock); 37551da177e4SLinus Torvalds 37561da177e4SLinus Torvalds /* honor the flush wishes from the caller, simple commits can 37571da177e4SLinus Torvalds ** be done outside the journal lock, they are done below 37581da177e4SLinus Torvalds ** 37591da177e4SLinus Torvalds ** if we don't flush the commit list right now, we put it into 37601da177e4SLinus Torvalds ** the work queue so the people waiting on the async progress work 37611da177e4SLinus Torvalds ** queue don't wait for this proc to flush journal lists and such. 37621da177e4SLinus Torvalds */ 37631da177e4SLinus Torvalds if (flush) { 37641da177e4SLinus Torvalds flush_commit_list(p_s_sb, jl, 1) ; 37651da177e4SLinus Torvalds flush_journal_list(p_s_sb, jl, 1) ; 37661da177e4SLinus Torvalds } else if (!(jl->j_state & LIST_COMMIT_PENDING)) 37671da177e4SLinus Torvalds queue_delayed_work(commit_wq, &journal->j_work, HZ/10); 37681da177e4SLinus Torvalds 37691da177e4SLinus Torvalds 37701da177e4SLinus Torvalds /* if the next transaction has any chance of wrapping, flush 37711da177e4SLinus Torvalds ** transactions that might get overwritten. If any journal lists are very 37721da177e4SLinus Torvalds ** old flush them as well. 37731da177e4SLinus Torvalds */ 37741da177e4SLinus Torvalds first_jl: 37751da177e4SLinus Torvalds list_for_each_safe(entry, safe, &journal->j_journal_list) { 37761da177e4SLinus Torvalds temp_jl = JOURNAL_LIST_ENTRY(entry); 37771da177e4SLinus Torvalds if (journal->j_start <= temp_jl->j_start) { 37781da177e4SLinus Torvalds if ((journal->j_start + journal->j_trans_max + 1) >= 37791da177e4SLinus Torvalds temp_jl->j_start) 37801da177e4SLinus Torvalds { 37811da177e4SLinus Torvalds flush_used_journal_lists(p_s_sb, temp_jl); 37821da177e4SLinus Torvalds goto first_jl; 37831da177e4SLinus Torvalds } else if ((journal->j_start + 37841da177e4SLinus Torvalds journal->j_trans_max + 1) < 37851da177e4SLinus Torvalds SB_ONDISK_JOURNAL_SIZE(p_s_sb)) 37861da177e4SLinus Torvalds { 37871da177e4SLinus Torvalds /* if we don't cross into the next transaction and we don't 37881da177e4SLinus Torvalds * wrap, there is no way we can overlap any later transactions 37891da177e4SLinus Torvalds * break now 37901da177e4SLinus Torvalds */ 37911da177e4SLinus Torvalds break; 37921da177e4SLinus Torvalds } 37931da177e4SLinus Torvalds } else if ((journal->j_start + 37941da177e4SLinus Torvalds journal->j_trans_max + 1) > 37951da177e4SLinus Torvalds SB_ONDISK_JOURNAL_SIZE(p_s_sb)) 37961da177e4SLinus Torvalds { 37971da177e4SLinus Torvalds if (((journal->j_start + journal->j_trans_max + 1) % 37981da177e4SLinus Torvalds SB_ONDISK_JOURNAL_SIZE(p_s_sb)) >= temp_jl->j_start) 37991da177e4SLinus Torvalds { 38001da177e4SLinus Torvalds flush_used_journal_lists(p_s_sb, temp_jl); 38011da177e4SLinus Torvalds goto first_jl; 38021da177e4SLinus Torvalds } else { 38031da177e4SLinus Torvalds /* we don't overlap anything from out start to the end of the 38041da177e4SLinus Torvalds * log, and our wrapped portion doesn't overlap anything at 38051da177e4SLinus Torvalds * the start of the log. We can break 38061da177e4SLinus Torvalds */ 38071da177e4SLinus Torvalds break; 38081da177e4SLinus Torvalds } 38091da177e4SLinus Torvalds } 38101da177e4SLinus Torvalds } 38111da177e4SLinus Torvalds flush_old_journal_lists(p_s_sb); 38121da177e4SLinus Torvalds 38131da177e4SLinus Torvalds journal->j_current_jl->j_list_bitmap = get_list_bitmap(p_s_sb, journal->j_current_jl) ; 38141da177e4SLinus Torvalds 38151da177e4SLinus Torvalds if (!(journal->j_current_jl->j_list_bitmap)) { 38161da177e4SLinus Torvalds reiserfs_panic(p_s_sb, "journal-1996: do_journal_end, could not get a list bitmap\n") ; 38171da177e4SLinus Torvalds } 38181da177e4SLinus Torvalds 38191da177e4SLinus Torvalds atomic_set(&(journal->j_jlock), 0) ; 38201da177e4SLinus Torvalds unlock_journal(p_s_sb) ; 38211da177e4SLinus Torvalds /* wake up any body waiting to join. */ 38221da177e4SLinus Torvalds clear_bit(J_WRITERS_QUEUED, &journal->j_state); 38231da177e4SLinus Torvalds wake_up(&(journal->j_join_wait)) ; 38241da177e4SLinus Torvalds 38251da177e4SLinus Torvalds if (!flush && wait_on_commit && 38261da177e4SLinus Torvalds journal_list_still_alive(p_s_sb, commit_trans_id)) { 38271da177e4SLinus Torvalds flush_commit_list(p_s_sb, jl, 1) ; 38281da177e4SLinus Torvalds } 38291da177e4SLinus Torvalds out: 38301da177e4SLinus Torvalds reiserfs_check_lock_depth(p_s_sb, "journal end2"); 38311da177e4SLinus Torvalds 38321da177e4SLinus Torvalds memset (th, 0, sizeof (*th)); 38331da177e4SLinus Torvalds /* Re-set th->t_super, so we can properly keep track of how many 38341da177e4SLinus Torvalds * persistent transactions there are. We need to do this so if this 38351da177e4SLinus Torvalds * call is part of a failed restart_transaction, we can free it later */ 38361da177e4SLinus Torvalds th->t_super = p_s_sb; 38371da177e4SLinus Torvalds 38381da177e4SLinus Torvalds return journal->j_errno; 38391da177e4SLinus Torvalds } 38401da177e4SLinus Torvalds 38411da177e4SLinus Torvalds static void 38421da177e4SLinus Torvalds __reiserfs_journal_abort_hard (struct super_block *sb) 38431da177e4SLinus Torvalds { 38441da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (sb); 38451da177e4SLinus Torvalds if (test_bit (J_ABORTED, &journal->j_state)) 38461da177e4SLinus Torvalds return; 38471da177e4SLinus Torvalds 38481da177e4SLinus Torvalds printk (KERN_CRIT "REISERFS: Aborting journal for filesystem on %s\n", 38491da177e4SLinus Torvalds reiserfs_bdevname (sb)); 38501da177e4SLinus Torvalds 38511da177e4SLinus Torvalds sb->s_flags |= MS_RDONLY; 38521da177e4SLinus Torvalds set_bit (J_ABORTED, &journal->j_state); 38531da177e4SLinus Torvalds 38541da177e4SLinus Torvalds #ifdef CONFIG_REISERFS_CHECK 38551da177e4SLinus Torvalds dump_stack(); 38561da177e4SLinus Torvalds #endif 38571da177e4SLinus Torvalds } 38581da177e4SLinus Torvalds 38591da177e4SLinus Torvalds static void 38601da177e4SLinus Torvalds __reiserfs_journal_abort_soft (struct super_block *sb, int errno) 38611da177e4SLinus Torvalds { 38621da177e4SLinus Torvalds struct reiserfs_journal *journal = SB_JOURNAL (sb); 38631da177e4SLinus Torvalds if (test_bit (J_ABORTED, &journal->j_state)) 38641da177e4SLinus Torvalds return; 38651da177e4SLinus Torvalds 38661da177e4SLinus Torvalds if (!journal->j_errno) 38671da177e4SLinus Torvalds journal->j_errno = errno; 38681da177e4SLinus Torvalds 38691da177e4SLinus Torvalds __reiserfs_journal_abort_hard (sb); 38701da177e4SLinus Torvalds } 38711da177e4SLinus Torvalds 38721da177e4SLinus Torvalds void 38731da177e4SLinus Torvalds reiserfs_journal_abort (struct super_block *sb, int errno) 38741da177e4SLinus Torvalds { 38751da177e4SLinus Torvalds return __reiserfs_journal_abort_soft (sb, errno); 38761da177e4SLinus Torvalds } 3877