power: tps80031: battery-charger: register as mfd sub device
[linux-2.6.git] / include / linux / jbd.h
index 4527375..e6a5e34 100644 (file)
 #include <linux/bit_spinlock.h>
 #include <linux/mutex.h>
 #include <linux/timer.h>
-
-#include <asm/semaphore.h>
-#endif
+#include <linux/lockdep.h>
+#include <linux/slab.h>
 
 #define journal_oom_retry 1
 
 /*
- * Define JBD_PARANIOD_IOFAIL to cause a kernel BUG() if ext3 finds
+ * Define JBD_PARANOID_IOFAIL to cause a kernel BUG() if ext3 finds
  * certain classes of error which can occur due to failed IOs.  Under
  * normal use we want ext3 to continue after such errors, because
  * hardware _can_ fail, but for debugging purposes when running tests on
  * CONFIG_JBD_DEBUG is on.
  */
 #define JBD_EXPENSIVE_CHECKING
-extern int journal_enable_debug;
+extern u8 journal_enable_debug;
 
 #define jbd_debug(n, f, a...)                                          \
        do {                                                            \
                if ((n) <= journal_enable_debug) {                      \
                        printk (KERN_DEBUG "(%s, %d): %s: ",            \
-                               __FILE__, __LINE__, __FUNCTION__);      \
+                               __FILE__, __LINE__, __func__);  \
                        printk (f, ## a);                               \
                }                                                       \
        } while (0)
@@ -71,18 +70,18 @@ extern int journal_enable_debug;
 #define jbd_debug(f, a...)     /**/
 #endif
 
-extern void * __jbd_kmalloc (const char *where, size_t size, gfp_t flags, int retry);
-extern void * jbd_slab_alloc(size_t size, gfp_t flags);
-extern void jbd_slab_free(void *ptr, size_t size);
+static inline void *jbd_alloc(size_t size, gfp_t flags)
+{
+       return (void *)__get_free_pages(flags, get_order(size));
+}
 
-#define jbd_kmalloc(size, flags) \
-       __jbd_kmalloc(__FUNCTION__, (size), (flags), journal_oom_retry)
-#define jbd_rep_kmalloc(size, flags) \
-       __jbd_kmalloc(__FUNCTION__, (size), (flags), 1)
+static inline void jbd_free(void *ptr, size_t size)
+{
+       free_pages((unsigned long)ptr, get_order(size));
+};
 
 #define JFS_MIN_JOURNAL_BLOCKS 1024
 
-#ifdef __KERNEL__
 
 /**
  * typedef handle_t - The handle_t type represents a single atomic update being performed by some process.
@@ -246,35 +245,10 @@ typedef struct journal_superblock_s
 #include <linux/fs.h>
 #include <linux/sched.h>
 
-#define JBD_ASSERTIONS
-#ifdef JBD_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)
-
-#if defined(CONFIG_BUFFER_DEBUG)
-void buffer_assertion_failure(struct buffer_head *bh);
-#define J_ASSERT_BH(bh, expr)                                          \
-       do {                                                            \
-               if (!(expr))                                            \
-                       buffer_assertion_failure(bh);                   \
-               J_ASSERT(expr);                                         \
-       } while (0)
-#define J_ASSERT_JH(jh, expr)  J_ASSERT_BH(jh2bh(jh), expr)
-#else
+#define J_ASSERT(assert)       BUG_ON(!(assert))
+
 #define J_ASSERT_BH(bh, expr)  J_ASSERT(expr)
 #define J_ASSERT_JH(jh, expr)  J_ASSERT(expr)
-#endif
-
-#else
-#define J_ASSERT(assert)       do { } while (0)
-#endif         /* JBD_ASSERTIONS */
 
 #if defined(JBD_PARANOID_IOFAIL)
 #define J_EXPECT(expr, why...)         J_ASSERT(expr)
@@ -362,8 +336,7 @@ static inline void jbd_unlock_bh_journal_head(struct buffer_head *bh)
 struct jbd_revoke_table_s;
 
 /**
- * struct handle_s - The handle_s type is the concrete type associated with
- *     handle_t.
+ * struct handle_s - this is the concrete type associated with handle_t.
  * @h_transaction: Which compound transaction is this update a part of?
  * @h_buffer_credits: Number of remaining buffers we are allowed to dirty.
  * @h_ref: Reference count on this handle
@@ -371,12 +344,8 @@ struct jbd_revoke_table_s;
  * @h_sync: flag for sync-on-close
  * @h_jdata: flag to force data journaling
  * @h_aborted: flag indicating fatal error on handle
- **/
-
-/* Docbook can't yet cope with the bit fields, but will leave the documentation
- * in so it can be fixed later.
+ * @h_lockdep_map: lockdep info for debugging lock problems
  */
-
 struct handle_s
 {
        /* Which compound transaction is this update a part of? */
@@ -396,6 +365,10 @@ 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
 };
 
 
@@ -446,22 +419,24 @@ struct transaction_s
        /*
         * Transaction's current state
         * [no locking - only kjournald alters this]
+        * [j_list_lock] guards transition of a transaction into T_FINISHED
+        * state and subsequent call of __journal_drop_transaction()
         * FIXME: needs barriers
         * KLUDGE: [use j_state_lock]
         */
        enum {
                T_RUNNING,
                T_LOCKED,
-               T_RUNDOWN,
                T_FLUSH,
                T_COMMIT,
+               T_COMMIT_RECORD,
                T_FINISHED
        }                       t_state;
 
        /*
         * Where in the log does this transaction's commit start? [no locking]
         */
-       unsigned long           t_log_start;
+       unsigned int            t_log_start;
 
        /* Number of buffers on the t_buffers list [j_list_lock] */
        int                     t_nr_buffers;
@@ -558,15 +533,24 @@ struct transaction_s
        unsigned long           t_expires;
 
        /*
+        * When this transaction started, in nanoseconds [no locking]
+        */
+       ktime_t                 t_start_time;
+
+       /*
         * How many handles used this transaction? [t_handle_lock]
         */
        int t_handle_count;
 
+       /*
+        * This transaction is being forced and some process is
+        * waiting for it to finish.
+        */
+       unsigned int t_synchronous_commit:1;
 };
 
 /**
- * struct journal_s - The journal_s type is the concrete type associated with
- *     journal_t.
+ * struct journal_s - this is the concrete type associated with journal_t.
  * @j_flags:  General journaling state flags
  * @j_errno:  Is there an outstanding uncleared error on the journal (from a
  *     prior abort)?
@@ -625,6 +609,8 @@ 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_average_commit_time: the average amount of time in nanoseconds it
+ *     takes to commit a transaction to the disk.
  * @j_private: An opaque pointer to fs-private information.
  */
 
@@ -705,26 +691,26 @@ struct journal_s
         * Journal head: identifies the first unused block in the journal.
         * [j_state_lock]
         */
-       unsigned long           j_head;
+       unsigned int            j_head;
 
        /*
         * Journal tail: identifies the oldest still-used block in the journal.
         * [j_state_lock]
         */
-       unsigned long           j_tail;
+       unsigned int            j_tail;
 
        /*
         * Journal free: how many free blocks are there in the journal?
         * [j_state_lock]
         */
-       unsigned long           j_free;
+       unsigned int            j_free;
 
        /*
         * Journal start and end: the block numbers of the first usable block
         * and one beyond the last usable block in the journal. [j_state_lock]
         */
-       unsigned long           j_first;
-       unsigned long           j_last;
+       unsigned int            j_first;
+       unsigned int            j_last;
 
        /*
         * Device, blocksize and starting block offset for the location where we
@@ -732,7 +718,7 @@ struct journal_s
         */
        struct block_device     *j_dev;
        int                     j_blocksize;
-       unsigned long           j_blk_offset;
+       unsigned int            j_blk_offset;
 
        /*
         * Device which holds the client fs.  For internal journal this will be
@@ -814,9 +800,19 @@ struct journal_s
        struct buffer_head      **j_wbuf;
        int                     j_wbufsize;
 
+       /*
+        * this is the pid of the last person to run a synchronous operation
+        * through the journal.
+        */
        pid_t                   j_last_sync_writer;
 
        /*
+        * the average amount of time in nanoseconds it takes to commit a
+        * transaction to the disk.  [j_state_lock]
+        */
+       u64                     j_average_commit_time;
+
+       /*
         * An opaque pointer to fs-private information.  ext3 puts its
         * superblock pointer here
         */
@@ -832,6 +828,9 @@ struct journal_s
 #define JFS_FLUSHED    0x008   /* The journal superblock has been flushed */
 #define JFS_LOADED     0x010   /* The journal superblock has been loaded */
 #define JFS_BARRIER    0x020   /* Use IDE barriers */
+#define JFS_ABORT_ON_SYNCDATA_ERR      0x040  /* Abort the journal on file
+                                               * data write error in ordered
+                                               * mode */
 
 /*
  * Function declarations for the journaling transaction and buffer
@@ -850,7 +849,7 @@ extern void __journal_clean_data_list(transaction_t *transaction);
 
 /* Log buffer allocation */
 extern struct journal_head * journal_get_descriptor_buffer(journal_t *);
-int journal_next_log_block(journal_t *, unsigned long *);
+int journal_next_log_block(journal_t *, unsigned int *);
 
 /* Commit management */
 extern void journal_commit_transaction(journal_t *);
@@ -865,7 +864,7 @@ extern int
 journal_write_metadata_buffer(transaction_t      *transaction,
                              struct journal_head  *jh_in,
                              struct journal_head **jh_out,
-                             unsigned long        blocknr);
+                             unsigned int blocknr);
 
 /* Transaction locking */
 extern void            __wait_on_journal (journal_t *);
@@ -924,17 +923,16 @@ extern int           journal_set_features
                   (journal_t *, unsigned long, unsigned long, unsigned long);
 extern int        journal_create     (journal_t *);
 extern int        journal_load       (journal_t *journal);
-extern void       journal_destroy    (journal_t *);
+extern int        journal_destroy    (journal_t *);
 extern int        journal_recover    (journal_t *journal);
 extern int        journal_wipe       (journal_t *, int);
 extern int        journal_skip_recovery        (journal_t *);
 extern void       journal_update_superblock    (journal_t *, int);
-extern void       __journal_abort_hard (journal_t *);
 extern void       journal_abort      (journal_t *, int);
 extern int        journal_errno      (journal_t *);
 extern void       journal_ack_err    (journal_t *);
 extern int        journal_clear_err  (journal_t *);
-extern int        journal_bmap(journal_t *, unsigned long, unsigned long *);
+extern int        journal_bmap(journal_t *, unsigned int, unsigned int *);
 extern int        journal_force_commit(journal_t *);
 
 /*
@@ -942,7 +940,6 @@ extern int     journal_force_commit(journal_t *);
  */
 struct journal_head *journal_add_journal_head(struct buffer_head *bh);
 struct journal_head *journal_grab_journal_head(struct buffer_head *bh);
-void journal_remove_journal_head(struct buffer_head *bh);
 void journal_put_journal_head(struct journal_head *jh);
 
 /*
@@ -968,13 +965,14 @@ extern int           journal_init_revoke_caches(void);
 
 extern void       journal_destroy_revoke(journal_t *);
 extern int        journal_revoke (handle_t *,
-                               unsigned long, struct buffer_head *);
+                               unsigned int, struct buffer_head *);
 extern int        journal_cancel_revoke(handle_t *, struct journal_head *);
-extern void       journal_write_revoke_records(journal_t *, transaction_t *);
+extern void       journal_write_revoke_records(journal_t *,
+                                               transaction_t *, int);
 
 /* Recovery revoke support */
-extern int     journal_set_revoke(journal_t *, unsigned long, tid_t);
-extern int     journal_test_revoke(journal_t *, unsigned long, tid_t);
+extern int     journal_set_revoke(journal_t *, unsigned int, tid_t);
+extern int     journal_test_revoke(journal_t *, unsigned int, tid_t);
 extern void    journal_clear_revoke(journal_t *);
 extern void    journal_switch_revoke_table(journal_t *journal);
 
@@ -992,6 +990,7 @@ int journal_start_commit(journal_t *journal, tid_t *tid);
 int journal_force_commit_nested(journal_t *journal);
 int log_wait_commit(journal_t *journal, tid_t tid);
 int log_do_checkpoint(journal_t *journal);
+int journal_trans_will_send_data_barrier(journal_t *journal, tid_t tid);
 
 void __log_wait_for_space(journal_t *journal);
 extern void    __journal_drop_transaction(journal_t *, transaction_t *);
@@ -1001,7 +1000,7 @@ extern int        cleanup_journal_tail(journal_t *);
 
 #define jbd_ENOSYS() \
 do {                                                                      \
-       printk (KERN_ERR "JBD unimplemented function %s\n", __FUNCTION__); \
+       printk (KERN_ERR "JBD unimplemented function %s\n", __func__); \
        current->state = TASK_UNINTERRUPTIBLE;                             \
        schedule();                                                        \
 } while (1)