diff options
Diffstat (limited to 'include/linux/jbd2.h')
| -rw-r--r-- | include/linux/jbd2.h | 135 |
1 files changed, 116 insertions, 19 deletions
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h index 06ef1145705..2cbf6fdb179 100644 --- a/include/linux/jbd2.h +++ b/include/linux/jbd2.h @@ -149,6 +149,28 @@ typedef struct journal_header_s __be32 h_sequence; } journal_header_t; +/* + * Checksum types. + */ +#define JBD2_CRC32_CHKSUM 1 +#define JBD2_MD5_CHKSUM 2 +#define JBD2_SHA1_CHKSUM 3 + +#define JBD2_CRC32_CHKSUM_SIZE 4 + +#define JBD2_CHECKSUM_BYTES (32 / sizeof(u32)) +/* + * Commit block header for storing transactional checksums: + */ +struct commit_header { + __be32 h_magic; + __be32 h_blocktype; + __be32 h_sequence; + unsigned char h_chksum_type; + unsigned char h_chksum_size; + unsigned char h_padding[2]; + __be32 h_chksum[JBD2_CHECKSUM_BYTES]; +}; /* * The block tag: used to describe a single buffer in the journal. @@ -242,31 +264,25 @@ typedef struct journal_superblock_s ((j)->j_format_version >= 2 && \ ((j)->j_superblock->s_feature_incompat & cpu_to_be32((mask)))) -#define JBD2_FEATURE_INCOMPAT_REVOKE 0x00000001 -#define JBD2_FEATURE_INCOMPAT_64BIT 0x00000002 +#define JBD2_FEATURE_COMPAT_CHECKSUM 0x00000001 + +#define JBD2_FEATURE_INCOMPAT_REVOKE 0x00000001 +#define JBD2_FEATURE_INCOMPAT_64BIT 0x00000002 +#define JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT 0x00000004 /* Features known to this kernel version: */ -#define JBD2_KNOWN_COMPAT_FEATURES 0 +#define JBD2_KNOWN_COMPAT_FEATURES JBD2_FEATURE_COMPAT_CHECKSUM #define JBD2_KNOWN_ROCOMPAT_FEATURES 0 #define JBD2_KNOWN_INCOMPAT_FEATURES (JBD2_FEATURE_INCOMPAT_REVOKE | \ - JBD2_FEATURE_INCOMPAT_64BIT) + JBD2_FEATURE_INCOMPAT_64BIT | \ + JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT) #ifdef __KERNEL__ #include <linux/fs.h> #include <linux/sched.h> -#define JBD2_ASSERTIONS -#ifdef JBD2_ASSERTIONS -#define J_ASSERT(assert) \ -do { \ - if (!(assert)) { \ - printk (KERN_EMERG \ - "Assertion failure in %s() at %s:%d: \"%s\"\n", \ - __FUNCTION__, __FILE__, __LINE__, # assert); \ - BUG(); \ - } \ -} while (0) +#define J_ASSERT(assert) BUG_ON(!(assert)) #if defined(CONFIG_BUFFER_DEBUG) void buffer_assertion_failure(struct buffer_head *bh); @@ -282,10 +298,6 @@ void buffer_assertion_failure(struct buffer_head *bh); #define J_ASSERT_JH(jh, expr) J_ASSERT(expr) #endif -#else -#define J_ASSERT(assert) do { } while (0) -#endif /* JBD2_ASSERTIONS */ - #if defined(JBD2_PARANOID_IOFAIL) #define J_EXPECT(expr, why...) J_ASSERT(expr) #define J_EXPECT_BH(bh, expr, why...) J_ASSERT_BH(bh, expr) @@ -406,9 +418,23 @@ struct handle_s unsigned int h_sync: 1; /* sync-on-close */ unsigned int h_jdata: 1; /* force data journaling */ unsigned int h_aborted: 1; /* fatal error on handle */ + +#ifdef CONFIG_DEBUG_LOCK_ALLOC + struct lockdep_map h_lockdep_map; +#endif }; +/* + * Some stats for checkpoint phase + */ +struct transaction_chp_stats_s { + unsigned long cs_chp_time; + unsigned long cs_forced_to_close; + unsigned long cs_written; + unsigned long cs_dropped; +}; + /* The transaction_t type is the guts of the journaling mechanism. It * tracks a compound transaction through its various states: * @@ -456,6 +482,8 @@ struct transaction_s /* * Transaction's current state * [no locking - only kjournald2 alters this] + * [j_list_lock] guards transition of a transaction into T_FINISHED + * state and subsequent call of __jbd2_journal_drop_transaction() * FIXME: needs barriers * KLUDGE: [use j_state_lock] */ @@ -544,6 +572,21 @@ struct transaction_s spinlock_t t_handle_lock; /* + * Longest time some handle had to wait for running transaction + */ + unsigned long t_max_wait; + + /* + * When transaction started + */ + unsigned long t_start; + + /* + * Checkpointing stats [j_checkpoint_sem] + */ + struct transaction_chp_stats_s t_chp_stats; + + /* * Number of outstanding updates running on this transaction * [t_handle_lock] */ @@ -574,6 +617,39 @@ struct transaction_s }; +struct transaction_run_stats_s { + unsigned long rs_wait; + unsigned long rs_running; + unsigned long rs_locked; + unsigned long rs_flushing; + unsigned long rs_logging; + + unsigned long rs_handle_count; + unsigned long rs_blocks; + unsigned long rs_blocks_logged; +}; + +struct transaction_stats_s { + int ts_type; + unsigned long ts_tid; + union { + struct transaction_run_stats_s run; + struct transaction_chp_stats_s chp; + } u; +}; + +#define JBD2_STATS_RUN 1 +#define JBD2_STATS_CHECKPOINT 2 + +static inline unsigned long +jbd2_time_diff(unsigned long start, unsigned long end) +{ + if (end >= start) + return end - start; + + return end + (MAX_JIFFY_OFFSET - start); +} + /** * struct journal_s - The journal_s type is the concrete type associated with * journal_t. @@ -635,6 +711,12 @@ struct transaction_s * @j_wbufsize: maximum number of buffer_heads allowed in j_wbuf, the * number that will fit in j_blocksize * @j_last_sync_writer: most recent pid which did a synchronous write + * @j_history: Buffer storing the transactions statistics history + * @j_history_max: Maximum number of transactions in the statistics history + * @j_history_cur: Current number of transactions in the statistics history + * @j_history_lock: Protect the transactions statistics history + * @j_proc_entry: procfs entry for the jbd statistics directory + * @j_stats: Overall statistics * @j_private: An opaque pointer to fs-private information. */ @@ -827,6 +909,19 @@ struct journal_s pid_t j_last_sync_writer; /* + * Journal statistics + */ + struct transaction_stats_s *j_history; + int j_history_max; + int j_history_cur; + /* + * Protect the transactions statistics history + */ + spinlock_t j_history_lock; + struct proc_dir_entry *j_proc_entry; + struct transaction_stats_s j_stats; + + /* * An opaque pointer to fs-private information. ext3 puts its * superblock pointer here */ @@ -932,6 +1027,8 @@ extern int jbd2_journal_check_available_features (journal_t *, unsigned long, unsigned long, unsigned long); extern int jbd2_journal_set_features (journal_t *, unsigned long, unsigned long, unsigned long); +extern void jbd2_journal_clear_features + (journal_t *, unsigned long, unsigned long, unsigned long); extern int jbd2_journal_create (journal_t *); extern int jbd2_journal_load (journal_t *journal); extern void jbd2_journal_destroy (journal_t *); |