diff options
Diffstat (limited to 'include/linux/jbd2.h')
| -rw-r--r-- | include/linux/jbd2.h | 309 |
1 files changed, 173 insertions, 136 deletions
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h index fb3d71ad6eea..43b9297fe8a7 100644 --- a/include/linux/jbd2.h +++ b/include/linux/jbd2.h @@ -28,7 +28,7 @@ #include <linux/slab.h> #include <linux/bit_spinlock.h> #include <linux/blkdev.h> -#include <crypto/hash.h> +#include <linux/crc32c.h> #endif #define journal_oom_retry 1 @@ -54,20 +54,20 @@ * CONFIG_JBD2_DEBUG is on. */ #define JBD2_EXPENSIVE_CHECKING -extern ushort jbd2_journal_enable_debug; void __jbd2_debug(int level, const char *file, const char *func, unsigned int line, const char *fmt, ...); -#define jbd_debug(n, fmt, a...) \ +#define jbd2_debug(n, fmt, a...) \ __jbd2_debug((n), __FILE__, __func__, __LINE__, (fmt), ##a) #else -#define jbd_debug(n, fmt, a...) /**/ +#define jbd2_debug(n, fmt, a...) no_printk(fmt, ##a) #endif extern void *jbd2_alloc(size_t size, gfp_t flags); extern void jbd2_free(void *ptr, size_t size); #define JBD2_MIN_JOURNAL_BLOCKS 1024 +#define JBD2_DEFAULT_FAST_COMMIT_BLOCKS 256 #ifdef __KERNEL__ @@ -263,7 +263,12 @@ typedef struct journal_superblock_s /* 0x0050 */ __u8 s_checksum_type; /* checksum type */ __u8 s_padding2[3]; - __u32 s_padding[42]; +/* 0x0054 */ + __be32 s_num_fc_blks; /* Number of fast commit blocks */ + __be32 s_head; /* blocknr of head of log, only uptodate + * while the filesystem is clean */ +/* 0x005C */ + __u32 s_padding[40]; __be32 s_checksum; /* crc32c(superblock) */ /* 0x0100 */ @@ -271,17 +276,6 @@ typedef struct journal_superblock_s /* 0x0400 */ } journal_superblock_t; -/* Use the jbd2_{has,set,clear}_feature_* helpers; these will be removed */ -#define JBD2_HAS_COMPAT_FEATURE(j,mask) \ - ((j)->j_format_version >= 2 && \ - ((j)->j_superblock->s_feature_compat & cpu_to_be32((mask)))) -#define JBD2_HAS_RO_COMPAT_FEATURE(j,mask) \ - ((j)->j_format_version >= 2 && \ - ((j)->j_superblock->s_feature_ro_compat & cpu_to_be32((mask)))) -#define JBD2_HAS_INCOMPAT_FEATURE(j,mask) \ - ((j)->j_format_version >= 2 && \ - ((j)->j_superblock->s_feature_incompat & cpu_to_be32((mask)))) - #define JBD2_FEATURE_COMPAT_CHECKSUM 0x00000001 #define JBD2_FEATURE_INCOMPAT_REVOKE 0x00000001 @@ -397,7 +391,7 @@ static inline void jbd_unlock_bh_journal_head(struct buffer_head *bh) #define JI_WAIT_DATA (1 << __JI_WAIT_DATA) /** - * struct jbd_inode - The jbd_inode type is the structure linking inodes in + * struct jbd2_inode - The jbd_inode type is the structure linking inodes in * ordered mode present in a transaction so that we can sync them during commit. */ struct jbd2_inode { @@ -465,7 +459,6 @@ struct jbd2_revoke_table_s; * @h_ref: Reference count on this handle. * @h_err: Field for caller's use to track errors through large fs operations. * @h_sync: Flag for sync-on-close. - * @h_jdata: Flag to force data journaling. * @h_reserved: Flag for handle for reserved credits. * @h_aborted: Flag indicating fatal error on handle. * @h_type: For handle statistics. @@ -497,7 +490,6 @@ struct jbd2_journal_handle /* Flags [no locking] */ unsigned int h_sync: 1; - unsigned int h_jdata: 1; unsigned int h_reserved: 1; unsigned int h_aborted: 1; unsigned int h_type: 8; @@ -534,6 +526,7 @@ struct transaction_chp_stats_s { * The transaction keeps track of all of the buffers modified by a * running transaction, and all of the buffers committed but not yet * flushed to home for finished transactions. + * (Locking Documentation improved by LockDoc) */ /* @@ -549,9 +542,6 @@ struct transaction_chp_stats_s { * ->j_list_lock * * j_state_lock - * ->t_handle_lock - * - * j_state_lock * ->j_list_lock (journal_unmap_buffer) * */ @@ -589,18 +579,22 @@ struct transaction_s */ unsigned long t_log_start; - /* Number of buffers on the t_buffers list [j_list_lock] */ + /* + * Number of buffers on the t_buffers list [j_list_lock, no locks + * needed for jbd2 thread] + */ int t_nr_buffers; /* * Doubly-linked circular list of all buffers reserved but not yet - * modified by this transaction [j_list_lock] + * modified by this transaction [j_list_lock, no locks needed fo + * jbd2 thread] */ struct journal_head *t_reserved_list; /* * Doubly-linked circular list of all metadata buffers owned by this - * transaction [j_list_lock] + * transaction [j_list_lock, no locks needed for jbd2 thread] */ struct journal_head *t_buffers; @@ -618,15 +612,11 @@ struct transaction_s struct journal_head *t_checkpoint_list; /* - * Doubly-linked circular list of all buffers submitted for IO while - * checkpointing. [j_list_lock] - */ - struct journal_head *t_checkpoint_io_list; - - /* - * Doubly-linked circular list of metadata buffers being shadowed by log - * IO. The IO buffers on the iobuf list and the shadow buffers on this - * list match each other one for one at all times. [j_list_lock] + * Doubly-linked circular list of metadata buffers being + * shadowed by log IO. The IO buffers on the iobuf list and + * the shadow buffers on this list match each other one for + * one at all times. [j_list_lock, no locks needed for jbd2 + * thread] */ struct journal_head *t_shadow_list; @@ -639,11 +629,6 @@ struct transaction_s struct list_head t_inode_list; /* - * Protects info related to handles - */ - spinlock_t t_handle_lock; - - /* * Longest time some handle had to wait for running transaction */ unsigned long t_max_wait; @@ -654,12 +639,12 @@ struct transaction_s unsigned long t_start; /* - * When commit was requested + * When commit was requested [j_state_lock] */ unsigned long t_requested; /* - * Checkpointing stats [j_checkpoint_sem] + * Checkpointing stats [j_list_lock] */ struct transaction_chp_stats_s t_chp_stats; @@ -713,12 +698,6 @@ struct transaction_s /* Disk flush needs to be sent to fs partition [no locking] */ int t_need_data_flush; - - /* - * For use by the filesystem to store fs-specific data - * structures associated with the transaction - */ - struct list_head t_private_list; }; struct transaction_run_stats_s { @@ -763,7 +742,8 @@ enum passtype {PASS_SCAN, PASS_REVOKE, PASS_REPLAY}; struct journal_s { /** - * @j_flags: General journaling state flags [j_state_lock] + * @j_flags: General journaling state flags [j_state_lock, + * no lock for quick racy checks] */ unsigned long j_flags; @@ -791,11 +771,6 @@ struct journal_s journal_superblock_t *j_superblock; /** - * @j_format_version: Version of the superblock format. - */ - int j_format_version; - - /** * @j_state_lock: Protect the various scalars in the journal. */ rwlock_t j_state_lock; @@ -803,7 +778,8 @@ struct journal_s /** * @j_barrier_count: * - * Number of processes waiting to create a barrier lock [j_state_lock] + * Number of processes waiting to create a barrier lock [j_state_lock, + * no lock for quick racy checks] */ int j_barrier_count; @@ -816,7 +792,8 @@ struct journal_s * @j_running_transaction: * * Transactions: The current running transaction... - * [j_state_lock] [caller holding open handle] + * [j_state_lock, no lock for quick racy checks] [caller holding + * open handle] */ transaction_t *j_running_transaction; @@ -891,6 +868,29 @@ struct journal_s struct buffer_head *j_chkpt_bhs[JBD2_NR_BATCH]; /** + * @j_shrinker: + * + * Journal head shrinker, reclaim buffer's journal head which + * has been written back. + */ + struct shrinker *j_shrinker; + + /** + * @j_checkpoint_jh_count: + * + * Number of journal buffers on the checkpoint list. [j_list_lock] + */ + struct percpu_counter j_checkpoint_jh_count; + + /** + * @j_shrink_transaction: + * + * Record next transaction will shrink on the checkpoint list. + * [j_list_lock] + */ + transaction_t *j_shrink_transaction; + + /** * @j_head: * * Journal head: identifies the first unused block in the journal. @@ -941,8 +941,9 @@ struct journal_s /** * @j_fc_off: * - * Number of fast commit blocks currently allocated. - * [j_state_lock]. + * Number of fast commit blocks currently allocated. Accessed only + * during fast commit. Currently only process can do fast commit, so + * this field is not protected by any lock. */ unsigned long j_fc_off; @@ -985,9 +986,16 @@ struct journal_s struct block_device *j_fs_dev; /** - * @j_maxlen: Total maximum capacity of the journal region on disk. + * @j_fs_dev_wb_err: + * + * Records the errseq of the client fs's backing block device. + */ + errseq_t j_fs_dev_wb_err; + + /** + * @j_total_len: Total maximum capacity of the journal region on disk. */ - unsigned int j_maxlen; + unsigned int j_total_len; /** * @j_reserved_credits: @@ -1027,7 +1035,7 @@ struct journal_s * @j_commit_sequence: * * Sequence number of the most recently committed transaction - * [j_state_lock]. + * [j_state_lock, no lock for quick racy checks] */ tid_t j_commit_sequence; @@ -1035,7 +1043,7 @@ struct journal_s * @j_commit_request: * * Sequence number of the most recent transaction wanting commit - * [j_state_lock] + * [j_state_lock, no lock for quick racy checks] */ tid_t j_commit_request; @@ -1070,6 +1078,13 @@ struct journal_s int j_revoke_records_per_block; /** + * @j_transaction_overhead_buffers: + * + * Number of blocks each transaction needs for its own bookkeeping + */ + int j_transaction_overhead_buffers; + + /** * @j_commit_interval: * * What is the maximum transaction lifetime before we begin a commit? @@ -1105,8 +1120,9 @@ struct journal_s struct buffer_head **j_wbuf; /** - * @j_fc_wbuf: Array of fast commit bhs for - * jbd2_journal_commit_transaction. + * @j_fc_wbuf: Array of fast commit bhs for fast commit. Accessed only + * during a fast commit. Currently only process can do fast commit, so + * this field is not protected by any lock. */ struct buffer_head **j_fc_wbuf; @@ -1218,13 +1234,6 @@ struct journal_s void *j_private; /** - * @j_chksum_driver: - * - * Reference to checksum algorithm driver via cryptoapi. - */ - struct crypto_shash *j_chksum_driver; - - /** * @j_csum_seed: * * Precomputed journal UUID checksum for seeding other checksums. @@ -1251,9 +1260,9 @@ struct journal_s * Clean-up after fast commit or full commit. JBD2 calls this function * after every commit operation. */ - void (*j_fc_cleanup_callback)(struct journal_s *journal, int); + void (*j_fc_cleanup_callback)(struct journal_s *journal, int full, tid_t tid); - /* + /** * @j_fc_replay_callback: * * File-system specific function that performs replay of a fast @@ -1268,6 +1277,14 @@ struct journal_s struct buffer_head *bh, enum passtype pass, int off, tid_t expected_commit_id); + + /** + * @j_bmap: + * + * Bmap function that should be used instead of the generic + * VFS bmap function. + */ + int (*j_bmap)(struct journal_s *journal, sector_t *block); }; #define jbd2_might_wait_for_commit(j) \ @@ -1276,11 +1293,22 @@ struct journal_s rwsem_release(&j->j_trans_commit_map, _THIS_IP_); \ } while (0) +/* + * We can support any known requested features iff the + * superblock is not in version 1. Otherwise we fail to support any + * extended sb features. + */ +static inline bool jbd2_format_support_feature(journal_t *j) +{ + return j->j_superblock->s_header.h_blocktype != + cpu_to_be32(JBD2_SUPERBLOCK_V1); +} + /* journal feature predicate functions */ #define JBD2_FEATURE_COMPAT_FUNCS(name, flagname) \ static inline bool jbd2_has_feature_##name(journal_t *j) \ { \ - return ((j)->j_format_version >= 2 && \ + return (jbd2_format_support_feature(j) && \ ((j)->j_superblock->s_feature_compat & \ cpu_to_be32(JBD2_FEATURE_COMPAT_##flagname)) != 0); \ } \ @@ -1298,7 +1326,7 @@ static inline void jbd2_clear_feature_##name(journal_t *j) \ #define JBD2_FEATURE_RO_COMPAT_FUNCS(name, flagname) \ static inline bool jbd2_has_feature_##name(journal_t *j) \ { \ - return ((j)->j_format_version >= 2 && \ + return (jbd2_format_support_feature(j) && \ ((j)->j_superblock->s_feature_ro_compat & \ cpu_to_be32(JBD2_FEATURE_RO_COMPAT_##flagname)) != 0); \ } \ @@ -1316,7 +1344,7 @@ static inline void jbd2_clear_feature_##name(journal_t *j) \ #define JBD2_FEATURE_INCOMPAT_FUNCS(name, flagname) \ static inline bool jbd2_has_feature_##name(journal_t *j) \ { \ - return ((j)->j_format_version >= 2 && \ + return (jbd2_format_support_feature(j) && \ ((j)->j_superblock->s_feature_incompat & \ cpu_to_be32(JBD2_FEATURE_INCOMPAT_##flagname)) != 0); \ } \ @@ -1340,6 +1368,9 @@ JBD2_FEATURE_INCOMPAT_FUNCS(csum2, CSUM_V2) JBD2_FEATURE_INCOMPAT_FUNCS(csum3, CSUM_V3) JBD2_FEATURE_INCOMPAT_FUNCS(fast_commit, FAST_COMMIT) +/* Journal high priority write IO operation flags */ +#define JBD2_JOURNAL_REQ_FLAGS (REQ_META | REQ_SYNC | REQ_IDLE) + /* * Journal flag definitions */ @@ -1349,11 +1380,15 @@ JBD2_FEATURE_INCOMPAT_FUNCS(fast_commit, FAST_COMMIT) #define JBD2_FLUSHED 0x008 /* The journal superblock has been flushed */ #define JBD2_LOADED 0x010 /* The journal superblock has been loaded */ #define JBD2_BARRIER 0x020 /* Use IDE barriers */ -#define JBD2_ABORT_ON_SYNCDATA_ERR 0x040 /* Abort the journal on file - * data write error in ordered - * mode */ +#define JBD2_CYCLE_RECORD 0x080 /* Journal cycled record log on + * clean and empty filesystem + * logging area */ #define JBD2_FAST_COMMIT_ONGOING 0x100 /* Fast commit is ongoing */ #define JBD2_FULL_COMMIT_ONGOING 0x200 /* Full commit is ongoing */ +#define JBD2_JOURNAL_FLUSH_DISCARD 0x0001 +#define JBD2_JOURNAL_FLUSH_ZEROOUT 0x0002 +#define JBD2_JOURNAL_FLUSH_VALID (JBD2_JOURNAL_FLUSH_DISCARD | \ + JBD2_JOURNAL_FLUSH_ZEROOUT) /* * Function declarations for the journaling transaction and buffer @@ -1361,13 +1396,10 @@ JBD2_FEATURE_INCOMPAT_FUNCS(fast_commit, FAST_COMMIT) */ /* Filing buffers */ -extern void jbd2_journal_unfile_buffer(journal_t *, struct journal_head *); extern bool __jbd2_journal_refile_buffer(struct journal_head *); extern void jbd2_journal_refile_buffer(journal_t *, struct journal_head *); extern void __jbd2_journal_file_buffer(struct journal_head *, transaction_t *, int); -extern void __journal_free_buffer(struct journal_head *bh); extern void jbd2_journal_file_buffer(struct journal_head *, transaction_t *, int); -extern void __journal_clean_data_list(transaction_t *transaction); static inline void jbd2_file_log_bh(struct list_head *head, struct buffer_head *bh) { list_add_tail(&bh->b_assoc_buffers, head); @@ -1390,8 +1422,12 @@ void jbd2_update_log_tail(journal_t *journal, tid_t tid, unsigned long block); extern void jbd2_journal_commit_transaction(journal_t *); /* Checkpoint list management */ -void __jbd2_journal_clean_checkpoint_list(journal_t *journal, bool destroy); +enum jbd2_shrink_type {JBD2_SHRINK_DESTROY, JBD2_SHRINK_BUSY_STOP, JBD2_SHRINK_BUSY_SKIP}; + +void __jbd2_journal_clean_checkpoint_list(journal_t *journal, enum jbd2_shrink_type type); +unsigned long jbd2_journal_shrink_checkpoint_list(journal_t *journal, unsigned long *nr_to_scan); int __jbd2_journal_remove_checkpoint(struct journal_head *); +int jbd2_journal_try_remove_checkpoint(struct journal_head *jh); void jbd2_journal_destroy_checkpoint(journal_t *journal); void __jbd2_journal_insert_checkpoint(struct journal_head *, transaction_t *); @@ -1431,9 +1467,6 @@ extern int jbd2_journal_write_metadata_buffer(transaction_t *transaction, struct buffer_head **bh_out, sector_t blocknr); -/* Transaction locking */ -extern void __wait_on_journal (journal_t *); - /* Transaction cache support */ extern void jbd2_journal_destroy_transaction_cache(void); extern int __init jbd2_journal_init_transaction_cache(void); @@ -1480,14 +1513,16 @@ void jbd2_journal_set_triggers(struct buffer_head *, struct jbd2_buffer_trigger_type *type); extern int jbd2_journal_dirty_metadata (handle_t *, struct buffer_head *); extern int jbd2_journal_forget (handle_t *, struct buffer_head *); -extern int jbd2_journal_invalidatepage(journal_t *, - struct page *, unsigned int, unsigned int); -extern int jbd2_journal_try_to_free_buffers(journal_t *journal, struct page *page); +int jbd2_journal_invalidate_folio(journal_t *, struct folio *, + size_t offset, size_t length); +bool jbd2_journal_try_to_free_buffers(journal_t *journal, struct folio *folio); extern int jbd2_journal_stop(handle_t *); -extern int jbd2_journal_flush (journal_t *); +extern int jbd2_journal_flush(journal_t *journal, unsigned int flags); extern void jbd2_journal_lock_updates (journal_t *); extern void jbd2_journal_unlock_updates (journal_t *); +void jbd2_journal_wait_updates(journal_t *); + extern journal_t * jbd2_journal_init_dev(struct block_device *bdev, struct block_device *fs_dev, unsigned long long start, int len, int bsize); @@ -1508,7 +1543,7 @@ extern int jbd2_journal_wipe (journal_t *, int); extern int jbd2_journal_skip_recovery (journal_t *); extern void jbd2_journal_update_sb_errno(journal_t *); extern int jbd2_journal_update_sb_log_tail (journal_t *, tid_t, - unsigned long, int); + unsigned long, blk_opf_t); extern void jbd2_journal_abort (journal_t *, int); extern int jbd2_journal_errno (journal_t *); extern void jbd2_journal_ack_err (journal_t *); @@ -1522,8 +1557,6 @@ extern int jbd2_journal_inode_ranged_write(handle_t *handle, extern int jbd2_journal_inode_ranged_wait(handle_t *handle, struct jbd2_inode *inode, loff_t start_byte, loff_t length); -extern int jbd2_journal_submit_inode_data_buffers( - struct jbd2_inode *jinode); extern int jbd2_journal_finish_inode_data_buffers( struct jbd2_inode *jinode); extern int jbd2_journal_begin_ordered_truncate(journal_t *journal, @@ -1543,10 +1576,13 @@ void jbd2_journal_put_journal_head(struct journal_head *jh); */ extern struct kmem_cache *jbd2_handle_cache; -static inline handle_t *jbd2_alloc_handle(gfp_t gfp_flags) -{ - return kmem_cache_zalloc(jbd2_handle_cache, gfp_flags); -} +/* + * This specialized allocator has to be a macro for its allocations to be + * accounted separately (to have a separate alloc_tag). The typecast is + * intentional to enforce typesafety. + */ +#define jbd2_alloc_handle(_gfp_flags) \ + ((handle_t *)kmem_cache_zalloc(jbd2_handle_cache, _gfp_flags)) static inline void jbd2_free_handle(handle_t *handle) { @@ -1559,10 +1595,13 @@ static inline void jbd2_free_handle(handle_t *handle) */ extern struct kmem_cache *jbd2_inode_cache; -static inline struct jbd2_inode *jbd2_alloc_inode(gfp_t gfp_flags) -{ - return kmem_cache_alloc(jbd2_inode_cache, gfp_flags); -} +/* + * This specialized allocator has to be a macro for its allocations to be + * accounted separately (to have a separate alloc_tag). The typecast is + * intentional to enforce typesafety. + */ +#define jbd2_alloc_inode(_gfp_flags) \ + ((struct jbd2_inode *)kmem_cache_alloc(jbd2_inode_cache, _gfp_flags)) static inline void jbd2_free_inode(struct jbd2_inode *jinode) { @@ -1576,10 +1615,12 @@ extern void jbd2_journal_destroy_revoke_record_cache(void); extern void jbd2_journal_destroy_revoke_table_cache(void); extern int __init jbd2_journal_init_revoke_record_cache(void); extern int __init jbd2_journal_init_revoke_table_cache(void); +struct jbd2_revoke_table_s *jbd2_journal_init_revoke_table(int hash_size); +void jbd2_journal_destroy_revoke_table(struct jbd2_revoke_table_s *table); extern void jbd2_journal_destroy_revoke(journal_t *); extern int jbd2_journal_revoke (handle_t *, unsigned long long, struct buffer_head *); -extern int jbd2_journal_cancel_revoke(handle_t *, struct journal_head *); +extern void jbd2_journal_cancel_revoke(handle_t *, struct journal_head *); extern void jbd2_journal_write_revoke_records(transaction_t *transaction, struct list_head *log_bufs); @@ -1598,7 +1639,6 @@ extern void jbd2_clear_buffer_revoked_flags(journal_t *journal); */ int jbd2_log_start_commit(journal_t *journal, tid_t tid); -int __jbd2_log_start_commit(journal_t *journal, tid_t tid); int jbd2_journal_start_commit(journal_t *journal, tid_t *tid); int jbd2_log_wait_commit(journal_t *journal, tid_t tid); int jbd2_transaction_committed(journal_t *journal, tid_t tid); @@ -1611,15 +1651,14 @@ extern void __jbd2_journal_drop_transaction(journal_t *, transaction_t *); extern int jbd2_cleanup_journal_tail(journal_t *); /* Fast commit related APIs */ -int jbd2_fc_init(journal_t *journal, int num_fc_blks); int jbd2_fc_begin_commit(journal_t *journal, tid_t tid); int jbd2_fc_end_commit(journal_t *journal); -int jbd2_fc_end_commit_fallback(journal_t *journal, tid_t tid); +int jbd2_fc_end_commit_fallback(journal_t *journal); int jbd2_fc_get_buf(journal_t *journal, struct buffer_head **bh_out); -int jbd2_submit_inode_data(struct jbd2_inode *jinode); +int jbd2_submit_inode_data(journal_t *journal, struct jbd2_inode *jinode); int jbd2_wait_inode_data(journal_t *journal, struct jbd2_inode *jinode); int jbd2_fc_wait_bufs(journal_t *journal, int num_blks); -int jbd2_fc_release_bufs(journal_t *journal); +void jbd2_fc_release_bufs(journal_t *journal); /* * is_journal_abort @@ -1648,6 +1687,25 @@ static inline void jbd2_journal_abort_handle(handle_t *handle) handle->h_aborted = 1; } +static inline void jbd2_init_fs_dev_write_error(journal_t *journal) +{ + struct address_space *mapping = journal->j_fs_dev->bd_mapping; + + /* + * Save the original wb_err value of client fs's bdev mapping which + * could be used to detect the client fs's metadata async write error. + */ + errseq_check_and_advance(&mapping->wb_err, &journal->j_fs_dev_wb_err); +} + +static inline int jbd2_check_fs_dev_write_error(journal_t *journal) +{ + struct address_space *mapping = journal->j_fs_dev->bd_mapping; + + return errseq_check(&mapping->wb_err, + READ_ONCE(journal->j_fs_dev_wb_err)); +} + #endif /* __KERNEL__ */ /* Comparison functions for transaction IDs: perform comparisons using @@ -1665,20 +1723,20 @@ static inline int tid_geq(tid_t x, tid_t y) return (difference >= 0); } -extern int jbd2_journal_blocks_per_page(struct inode *inode); +extern int jbd2_journal_blocks_per_folio(struct inode *inode); extern size_t journal_tag_bytes(journal_t *journal); -static inline bool jbd2_journal_has_csum_v2or3_feature(journal_t *j) +static inline int jbd2_journal_has_csum_v2or3(journal_t *journal) { - return jbd2_has_feature_csum2(j) || jbd2_has_feature_csum3(j); + return jbd2_has_feature_csum2(journal) || + jbd2_has_feature_csum3(journal); } -static inline int jbd2_journal_has_csum_v2or3(journal_t *journal) +static inline int jbd2_journal_get_num_fc_blks(journal_superblock_t *jsb) { - WARN_ON_ONCE(jbd2_journal_has_csum_v2or3_feature(journal) && - journal->j_chksum_driver == NULL); + int num_fc_blocks = be32_to_cpu(jsb->s_num_fc_blks); - return journal->j_chksum_driver != NULL; + return num_fc_blocks ? num_fc_blocks : JBD2_DEFAULT_FAST_COMMIT_BLOCKS; } /* @@ -1708,30 +1766,9 @@ static inline unsigned long jbd2_log_space_left(journal_t *journal) #define BJ_Reserved 4 /* Buffer is reserved for access by journal */ #define BJ_Types 5 -extern int jbd_blocks_per_page(struct inode *inode); - -/* JBD uses a CRC32 checksum */ -#define JBD_MAX_CHECKSUM_SIZE 4 - -static inline u32 jbd2_chksum(journal_t *journal, u32 crc, - const void *address, unsigned int length) +static inline u32 jbd2_chksum(u32 crc, const void *address, unsigned int length) { - struct { - struct shash_desc shash; - char ctx[JBD_MAX_CHECKSUM_SIZE]; - } desc; - int err; - - BUG_ON(crypto_shash_descsize(journal->j_chksum_driver) > - JBD_MAX_CHECKSUM_SIZE); - - desc.shash.tfm = journal->j_chksum_driver; - *(u32 *)desc.ctx = crc; - - err = crypto_shash_update(&desc.shash, address, length); - BUG_ON(err); - - return *(u32 *)desc.ctx; + return crc32c(crc, address, length); } /* Return most recent uncommitted transaction */ |