#ifndef _LINUX_JBD_H
#define _LINUX_JBD_H
-#if defined(CONFIG_JBD) || defined(CONFIG_JBD_MODULE) || !defined(__KERNEL__)
-
-/* Allow this file to be included directly into e2fsprogs */
-#ifndef __KERNEL__
#include "jfs_compat.h"
#define JFS_DEBUG
#define jfs_debug jbd_debug
-#else
-
-#include <linux/journal-head.h>
-#include <linux/stddef.h>
-#include <asm/semaphore.h>
-#endif
#ifndef __GNUC__
#define __FUNCTION__ ""
} while (0)
#else
#ifdef __GNUC__
+#if defined(__KERNEL__) || !defined(CONFIG_JBD_DEBUG)
#define jbd_debug(f, a...) /**/
#else
+extern int journal_enable_debug;
+#define jbd_debug(n, f, a...) \
+ do { \
+ if ((n) <= journal_enable_debug) { \
+ printf("(%s, %d): %s: ", \
+ __FILE__, __LINE__, __func__); \
+ printf(f, ## a); \
+ } \
+ } while (0)
+#endif /*__KERNEL__ */
+#else
#define jbd_debug(f, ...) /**/
#endif
#endif
#define JFS_MIN_JOURNAL_BLOCKS 1024
-#ifdef __KERNEL__
-typedef struct handle_s handle_t; /* Atomic operation type */
-typedef struct journal_s journal_t; /* Journal control structure */
-#endif
-
/*
* Internal structures used by the logging mechanism:
*/
* journal_block_tag (in the descriptor). The other h_chksum* fields are
* not used.
*
- * Checksum v1 and v2 are mutually exclusive features.
+ * If FEATURE_INCOMPAT_CSUM_V3 is set, the descriptor block uses
+ * journal_block_tag3_t to store a full 32-bit checksum. Everything else
+ * is the same as v2.
+ *
+ * Checksum v1, v2, and v3 are mutually exclusive features.
*/
struct commit_header {
__u32 h_magic;
/*
* The block tag: used to describe a single buffer in the journal
*/
+typedef struct journal_block_tag3_s
+{
+ __u32 t_blocknr; /* The on-disk block number */
+ __u32 t_flags; /* See below */
+ __u32 t_blocknr_high; /* most-significant high 32bits. */
+ __u32 t_checksum; /* crc32c(uuid+seq+block) */
+} journal_block_tag3_t;
+
typedef struct journal_block_tag_s
{
__u32 t_blocknr; /* The on-disk block number */
__u32 t_blocknr_high; /* most-significant high 32bits. */
} journal_block_tag_t;
-#define JBD_TAG_SIZE64 (sizeof(journal_block_tag_t))
-#define JBD_TAG_SIZE32 (8)
-
/* Tail of descriptor block, for checksumming */
struct journal_block_tail {
- __u32 t_checksum;
+ __be32 t_checksum;
};
/*
/* Tail of revoke block, for checksumming */
struct journal_revoke_tail {
- __u32 r_checksum;
+ __be32 r_checksum;
};
/* Definitions for the journal tag flags word: */
((j)->j_format_version >= 2 && \
((j)->j_superblock->s_feature_incompat & ext2fs_cpu_to_be32((mask))))
-#define JFS_FEATURE_COMPAT_CHECKSUM 0x00000001
+#define JFS_FEATURE_COMPAT_CHECKSUM 0x00000001
#define JFS_FEATURE_INCOMPAT_REVOKE 0x00000001
#define JFS_FEATURE_INCOMPAT_64BIT 0x00000002
#define JFS_FEATURE_INCOMPAT_ASYNC_COMMIT 0x00000004
#define JFS_FEATURE_INCOMPAT_CSUM_V2 0x00000008
+#define JFS_FEATURE_INCOMPAT_CSUM_V3 0x00000010
/* Features known to this kernel version: */
#define JFS_KNOWN_COMPAT_FEATURES 0
#define JFS_KNOWN_INCOMPAT_FEATURES (JFS_FEATURE_INCOMPAT_REVOKE|\
JFS_FEATURE_INCOMPAT_ASYNC_COMMIT|\
JFS_FEATURE_INCOMPAT_64BIT|\
- JFS_FEATURE_INCOMPAT_CSUM_V2)
+ JFS_FEATURE_INCOMPAT_CSUM_V2|\
+ JFS_FEATURE_INCOMPAT_CSUM_V3)
+
+#ifdef NO_INLINE_FUNCS
+extern size_t journal_tag_bytes(journal_t *journal);
+extern int journal_has_csum_v2or3(journal_t *journal);
+extern int tid_gt(tid_t x, tid_t y) EXT2FS_ATTR((unused));
+extern int tid_geq(tid_t x, tid_t y) EXT2FS_ATTR((unused));
+#endif
#if (defined(E2FSCK_INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS))
#ifdef E2FSCK_INCLUDE_INLINE_FUNCS
#endif /* __STDC_VERSION__ >= 199901L */
#endif /* INCLUDE_INLINE_FUNCS */
-/*
- * helper functions to deal with 32 or 64bit block numbers.
- */
-_INLINE_ size_t journal_tag_bytes(journal_t *journal)
-{
- journal_block_tag_t tag;
- size_t x = 0;
-
- if (JFS_HAS_INCOMPAT_FEATURE(journal, JFS_FEATURE_INCOMPAT_CSUM_V2))
- x += sizeof(tag.t_checksum);
-
- if (JFS_HAS_INCOMPAT_FEATURE(journal, JFS_FEATURE_INCOMPAT_64BIT))
- return x + JBD_TAG_SIZE64;
- else
- return x + JBD_TAG_SIZE32;
-}
-#undef _INLINE_
-#endif
-
-#ifdef __KERNEL__
-
-#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_BH(bh, expr) J_ASSERT(expr)
-#define J_ASSERT_JH(jh, expr) J_ASSERT(expr)
-#endif
-
-#else
-#define J_ASSERT(assert)
-#endif /* JBD_ASSERTIONS */
-
-enum jbd_state_bits {
- BH_JWrite
- = BH_PrivateStart, /* 1 if being written to log (@@@ DEBUGGING) */
- BH_Freed, /* 1 if buffer has been freed (truncated) */
- BH_Revoked, /* 1 if buffer has been revoked from the log */
- BH_RevokeValid, /* 1 if buffer revoked flag is valid */
- BH_JBDDirty, /* 1 if buffer is dirty but journaled */
-};
-
-/* Return true if the buffer is one which JBD is managing */
-static inline int buffer_jbd(struct buffer_head *bh)
-{
- return __buffer_state(bh, JBD);
+/* journal feature predicate functions */
+#define JFS_FEATURE_COMPAT_FUNCS(name, flagname) \
+_INLINE_ int jfs_has_feature_##name(journal_t *j); \
+_INLINE_ int jfs_has_feature_##name(journal_t *j) \
+{ \
+ return ((j)->j_format_version >= 2 && \
+ ((j)->j_superblock->s_feature_compat & \
+ ext2fs_cpu_to_be32(JFS_FEATURE_COMPAT_##flagname)) != 0); \
+} \
+_INLINE_ void jfs_set_feature_##name(journal_t *j); \
+_INLINE_ void jfs_set_feature_##name(journal_t *j) \
+{ \
+ (j)->j_superblock->s_feature_compat |= \
+ ext2fs_cpu_to_be32(JFS_FEATURE_COMPAT_##flagname); \
+} \
+_INLINE_ void jfs_clear_feature_##name(journal_t *j); \
+_INLINE_ void jfs_clear_feature_##name(journal_t *j) \
+{ \
+ (j)->j_superblock->s_feature_compat &= \
+ ~ext2fs_cpu_to_be32(JFS_FEATURE_COMPAT_##flagname); \
}
-static inline struct buffer_head *jh2bh(struct journal_head *jh)
-{
- return jh->b_bh;
+#define JFS_FEATURE_RO_COMPAT_FUNCS(name, flagname) \
+_INLINE_ int jfs_has_feature_##name(journal_t *j); \
+_INLINE_ int jfs_has_feature_##name(journal_t *j) \
+{ \
+ return ((j)->j_format_version >= 2 && \
+ ((j)->j_superblock->s_feature_ro_compat & \
+ ext2fs_cpu_to_be32(JFS_FEATURE_RO_COMPAT_##flagname)) != 0); \
+} \
+_INLINE_ void jfs_set_feature_##name(journal_t *j); \
+_INLINE_ void jfs_set_feature_##name(journal_t *j) \
+{ \
+ (j)->j_superblock->s_feature_ro_compat |= \
+ ext2fs_cpu_to_be32(JFS_FEATURE_RO_COMPAT_##flagname); \
+} \
+_INLINE_ void jfs_clear_feature_##name(journal_t *j); \
+_INLINE_ void jfs_clear_feature_##name(journal_t *j) \
+{ \
+ (j)->j_superblock->s_feature_ro_compat &= \
+ ~ext2fs_cpu_to_be32(JFS_FEATURE_RO_COMPAT_##flagname); \
}
-static inline struct journal_head *bh2jh(struct buffer_head *bh)
-{
- return bh->b_private;
+#define JFS_FEATURE_INCOMPAT_FUNCS(name, flagname) \
+_INLINE_ int jfs_has_feature_##name(journal_t *j); \
+_INLINE_ int jfs_has_feature_##name(journal_t *j) \
+{ \
+ return ((j)->j_format_version >= 2 && \
+ ((j)->j_superblock->s_feature_incompat & \
+ ext2fs_cpu_to_be32(JFS_FEATURE_INCOMPAT_##flagname)) != 0); \
+} \
+_INLINE_ void jfs_set_feature_##name(journal_t *j); \
+_INLINE_ void jfs_set_feature_##name(journal_t *j) \
+{ \
+ (j)->j_superblock->s_feature_incompat |= \
+ ext2fs_cpu_to_be32(JFS_FEATURE_INCOMPAT_##flagname); \
+} \
+_INLINE_ void jfs_clear_feature_##name(journal_t *j); \
+_INLINE_ void jfs_clear_feature_##name(journal_t *j) \
+{ \
+ (j)->j_superblock->s_feature_incompat &= \
+ ~ext2fs_cpu_to_be32(JFS_FEATURE_INCOMPAT_##flagname); \
}
-struct jbd_revoke_table_s;
-struct jbd2_revoke_table_s;
-
-/* The handle_t type represents a single atomic update being performed
- * by some process. All filesystem modifications made by the process go
- * through this handle. Recursive operations (such as quota operations)
- * are gathered into a single update.
- *
- * The buffer credits field is used to account for journaled buffers
- * being modified by the running process. To ensure that there is
- * enough log space for all outstanding operations, we need to limit the
- * number of outstanding buffers possible at any time. When the
- * operation completes, any buffer credits not used are credited back to
- * the transaction, so that at all times we know how many buffers the
- * outstanding updates on a transaction might possibly touch. */
-
-struct handle_s
-{
- /* Which compound transaction is this update a part of? */
- transaction_t * h_transaction;
-
- /* Number of remaining buffers we are allowed to dirty: */
- int h_buffer_credits;
-
- /* Reference count on this handle */
- int h_ref;
-
- /* Field for caller's use to track errors through large fs
- operations */
- int h_err;
-
- /* Flags */
- 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 */
-};
-
-
-/* The transaction_t type is the guts of the journaling mechanism. It
- * tracks a compound transaction through its various states:
- *
- * RUNNING: accepting new updates
- * LOCKED: Updates still running but we don't accept new ones
- * RUNDOWN: Updates are tidying up but have finished requesting
- * new buffers to modify (state not used for now)
- * FLUSH: All updates complete, but we are still writing to disk
- * COMMIT: All data on disk, writing commit record
- * FINISHED: We still have to keep the transaction for checkpointing.
- *
- * 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.
- */
-
-struct transaction_s
-{
- /* Pointer to the journal for this transaction. */
- journal_t * t_journal;
-
- /* Sequence number for this transaction */
- tid_t t_tid;
-
- /* Transaction's current state */
- enum {
- T_RUNNING,
- T_LOCKED,
- T_RUNDOWN,
- T_FLUSH,
- T_COMMIT,
- T_FINISHED
- } t_state;
-
- /* Where in the log does this transaction's commit start? */
- unsigned long t_log_start;
-
- /* Doubly-linked circular list of all inodes owned by this
- transaction */ /* AKPM: unused */
- struct inode * t_ilist;
-
- /* Number of buffers on the t_buffers list */
- int t_nr_buffers;
-
- /* Doubly-linked circular list of all buffers reserved but not
- yet modified by this transaction */
- struct journal_head * t_reserved_list;
-
- /* Doubly-linked circular list of all metadata buffers owned by this
- transaction */
- struct journal_head * t_buffers;
-
- /*
- * Doubly-linked circular list of all data buffers still to be
- * flushed before this transaction can be committed.
- * Protected by journal_datalist_lock.
- */
- struct journal_head * t_sync_datalist;
-
- /*
- * Doubly-linked circular list of all writepage data buffers
- * still to be written before this transaction can be committed.
- * Protected by journal_datalist_lock.
- */
- struct journal_head * t_async_datalist;
-
- /* Doubly-linked circular list of all forget buffers (superceded
- buffers which we can un-checkpoint once this transaction
- commits) */
- struct journal_head * t_forget;
-
- /*
- * Doubly-linked circular list of all buffers still to be
- * flushed before this transaction can be checkpointed.
- */
- /* Protected by journal_datalist_lock */
- struct journal_head * t_checkpoint_list;
-
- /* Doubly-linked circular list of temporary buffers currently
- undergoing IO in the log */
- struct journal_head * t_iobuf_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. */
- struct journal_head * t_shadow_list;
-
- /* Doubly-linked circular list of control buffers being written
- to the log. */
- struct journal_head * t_log_list;
-
- /* Number of outstanding updates running on this transaction */
- int t_updates;
-
- /* Number of buffers reserved for use by all handles in this
- * transaction handle but not yet modified. */
- int t_outstanding_credits;
-
- /*
- * Forward and backward links for the circular list of all
- * transactions awaiting checkpoint.
- */
- /* Protected by journal_datalist_lock */
- transaction_t *t_cpnext, *t_cpprev;
-
- /* When will the transaction expire (become due for commit), in
- * jiffies ? */
- unsigned long t_expires;
-
- /* How many handles used this transaction? */
- int t_handle_count;
-};
-
-
-/* The journal_t maintains all of the journaling state information for a
- * single filesystem. It is linked to from the fs superblock structure.
- *
- * We use the journal_t to keep track of all outstanding transaction
- * activity on the filesystem, and to manage the state of the log
- * writing process. */
-
-struct journal_s
-{
- /* General journaling state flags */
- unsigned long j_flags;
-
- /* Is there an outstanding uncleared error on the journal (from
- * a prior abort)? */
- int j_errno;
-
- /* The superblock buffer */
- struct buffer_head * j_sb_buffer;
- journal_superblock_t * j_superblock;
-
- /* Version of the superblock format */
- int j_format_version;
-
- /* Number of processes waiting to create a barrier lock */
- int j_barrier_count;
-
- /* The barrier lock itself */
- struct semaphore j_barrier;
-
- /* Transactions: The current running transaction... */
- transaction_t * j_running_transaction;
-
- /* ... the transaction we are pushing to disk ... */
- transaction_t * j_committing_transaction;
-
- /* ... and a linked circular list of all transactions waiting
- * for checkpointing. */
- /* Protected by journal_datalist_lock */
- transaction_t * j_checkpoint_transactions;
-
- /* Wait queue for waiting for a locked transaction to start
- committing, or for a barrier lock to be released */
- wait_queue_head_t j_wait_transaction_locked;
-
- /* Wait queue for waiting for checkpointing to complete */
- wait_queue_head_t j_wait_logspace;
-
- /* Wait queue for waiting for commit to complete */
- wait_queue_head_t j_wait_done_commit;
-
- /* Wait queue to trigger checkpointing */
- wait_queue_head_t j_wait_checkpoint;
-
- /* Wait queue to trigger commit */
- wait_queue_head_t j_wait_commit;
-
- /* Wait queue to wait for updates to complete */
- wait_queue_head_t j_wait_updates;
-
- /* Semaphore for locking against concurrent checkpoints */
- struct semaphore j_checkpoint_sem;
-
- /* The main journal lock, used by lock_journal() */
- struct semaphore j_sem;
-
- /* Journal head: identifies the first unused block in the journal. */
- unsigned long j_head;
-
- /* Journal tail: identifies the oldest still-used block in the
- * journal. */
- unsigned long j_tail;
-
- /* Journal free: how many free blocks are there in the journal? */
- unsigned long j_free;
-
- /* Journal start and end: the block numbers of the first usable
- * block and one beyond the last usable block in the journal. */
- unsigned long j_first, j_last;
-
- /* Device, blocksize and starting block offset for the location
- * where we store the journal. */
- kdev_t j_dev;
- int j_blocksize;
- unsigned int j_blk_offset;
-
- /* Device which holds the client fs. For internal journal this
- * will be equal to j_dev. */
- kdev_t j_fs_dev;
-
- /* Total maximum capacity of the journal region on disk. */
- unsigned int j_maxlen;
-
- /* Optional inode where we store the journal. If present, all
- * journal block numbers are mapped into this inode via
- * bmap(). */
- struct inode * j_inode;
-
- /* Sequence number of the oldest transaction in the log */
- tid_t j_tail_sequence;
- /* Sequence number of the next transaction to grant */
- tid_t j_transaction_sequence;
- /* Sequence number of the most recently committed transaction */
- tid_t j_commit_sequence;
- /* Sequence number of the most recent transaction wanting commit */
- tid_t j_commit_request;
-
- /* Journal uuid: identifies the object (filesystem, LVM volume
- * etc) backed by this journal. This will eventually be
- * replaced by an array of uuids, allowing us to index multiple
- * devices within a single journal and to perform atomic updates
- * across them. */
-
- __u8 j_uuid[16];
-
- /* Pointer to the current commit thread for this journal */
- struct task_struct * j_task;
-
- /* Maximum number of metadata buffers to allow in a single
- * compound commit transaction */
- int j_max_transaction_buffers;
-
- /* What is the maximum transaction lifetime before we begin a
- * commit? */
- unsigned long j_commit_interval;
-
- /* The timer used to wakeup the commit thread: */
- struct timer_list * j_commit_timer;
- int j_commit_timer_active;
+#else
+#define JFS_FEATURE_COMPAT_FUNCS(name, flagname) \
+extern int jfs_has_feature_##name(journal_t *j); \
+extern void jfs_set_feature_##name(journal_t *j); \
+extern void jfs_clear_feature_##name(journal_t *j);
- /* Link all journals together - system-wide */
- struct list_head j_all_journals;
+#define JFS_FEATURE_RO_COMPAT_FUNCS(name, flagname) \
+extern int jfs_has_feature_##name(journal_t *j); \
+extern void jfs_set_feature_##name(journal_t *j); \
+extern void jfs_clear_feature_##name(journal_t *j);
- /* The revoke table: maintains the list of revoked blocks in the
- current transaction. */
- struct jbd_revoke_table_s *j_revoke;
+#define JFS_FEATURE_INCOMPAT_FUNCS(name, flagname) \
+extern int jfs_has_feature_##name(journal_t *j); \
+extern void jfs_set_feature_##name(journal_t *j); \
+extern void jfs_clear_feature_##name(journal_t *j);
- /* Failed journal commit ID */
- unsigned int j_failed_commit;
-};
-
-/*
- * Journal flag definitions
- */
-#define JFS_UNMOUNT 0x001 /* Journal thread is being destroyed */
-#define JFS_ABORT 0x002 /* Journaling has been aborted for errors. */
-#define JFS_ACK_ERR 0x004 /* The errno in the sb has been acked */
-#define JFS_FLUSHED 0x008 /* The journal superblock has been flushed */
-#define JFS_LOADED 0x010 /* The journal superblock has been loaded */
+#endif /* (defined(E2FSCK_INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS)) */
-/*
- * Function declarations for the journaling transaction and buffer
- * management
- */
+JFS_FEATURE_COMPAT_FUNCS(checksum, CHECKSUM)
-/* Filing buffers */
-extern void __journal_unfile_buffer(struct journal_head *);
-extern void journal_unfile_buffer(struct journal_head *);
-extern void __journal_refile_buffer(struct journal_head *);
-extern void journal_refile_buffer(struct journal_head *);
-extern void __journal_file_buffer(struct journal_head *, transaction_t *, int);
-extern void __journal_free_buffer(struct journal_head *bh);
-extern void journal_file_buffer(struct journal_head *, transaction_t *, int);
-extern void __journal_clean_data_list(transaction_t *transaction);
-
-/* Log buffer allocation */
-extern struct journal_head * journal_get_descriptor_buffer(journal_t *);
-extern unsigned long journal_next_log_block(journal_t *);
-
-/* Commit management */
-extern void journal_commit_transaction(journal_t *);
-
-/* Checkpoint list management */
-int __journal_clean_checkpoint_list(journal_t *journal);
-extern void journal_remove_checkpoint(struct journal_head *);
-extern void __journal_remove_checkpoint(struct journal_head *);
-extern void journal_insert_checkpoint(struct journal_head *, transaction_t *);
-extern void __journal_insert_checkpoint(struct journal_head *,transaction_t *);
-
-/* Buffer IO */
-extern int
-journal_write_metadata_buffer(transaction_t *transaction,
- struct journal_head *jh_in,
- struct journal_head **jh_out,
- int blocknr);
-
-/* Transaction locking */
-extern void __wait_on_journal (journal_t *);
+JFS_FEATURE_INCOMPAT_FUNCS(revoke, REVOKE)
+JFS_FEATURE_INCOMPAT_FUNCS(64bit, 64BIT)
+JFS_FEATURE_INCOMPAT_FUNCS(async_commit, ASYNC_COMMIT)
+JFS_FEATURE_INCOMPAT_FUNCS(csum2, CSUM_V2)
+JFS_FEATURE_INCOMPAT_FUNCS(csum3, CSUM_V3)
+#if (defined(E2FSCK_INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS))
/*
- * Journal locking.
- *
- * We need to lock the journal during transaction state changes so that
- * nobody ever tries to take a handle on the running transaction while
- * we are in the middle of moving it to the commit phase.
- *
- * Note that the locking is completely interrupt unsafe. We never touch
- * journal structures from interrupts.
- *
- * In 2.2, the BKL was required for lock_journal. This is no longer
- * the case.
+ * helper functions to deal with 32 or 64bit block numbers.
*/
-
-static inline void lock_journal(journal_t *journal)
-{
- down(&journal->j_sem);
-}
-
-/* This returns zero if we acquired the semaphore */
-static inline int try_lock_journal(journal_t * journal)
-{
- return down_trylock(&journal->j_sem);
-}
-
-static inline void unlock_journal(journal_t * journal)
-{
- up(&journal->j_sem);
-}
-
-
-static inline handle_t *journal_current_handle(void)
+_INLINE_ size_t journal_tag_bytes(journal_t *journal)
{
- return current->journal_info;
-}
-
-/* The journaling code user interface:
- *
- * Create and destroy handles
- * Register buffer modifications against the current transaction.
- */
+ size_t sz;
-extern handle_t *journal_start(journal_t *, int nblocks);
-extern handle_t *journal_try_start(journal_t *, int nblocks);
-extern int journal_restart (handle_t *, int nblocks);
-extern int journal_extend (handle_t *, int nblocks);
-extern int journal_get_write_access (handle_t *, struct buffer_head *);
-extern int journal_get_create_access (handle_t *, struct buffer_head *);
-extern int journal_get_undo_access (handle_t *, struct buffer_head *);
-extern int journal_dirty_data (handle_t *,
- struct buffer_head *, int async);
-extern int journal_dirty_metadata (handle_t *, struct buffer_head *);
-extern void journal_release_buffer (handle_t *, struct buffer_head *);
-extern void journal_forget (handle_t *, struct buffer_head *);
-extern void journal_sync_buffer (struct buffer_head *);
-extern int journal_flushpage(journal_t *, struct page *, unsigned long);
-extern int journal_try_to_free_buffers(journal_t *, struct page *, int);
-extern int journal_stop(handle_t *);
-extern int journal_flush (journal_t *);
-
-extern void journal_lock_updates (journal_t *);
-extern void journal_unlock_updates (journal_t *);
-
-extern journal_t * journal_init_dev(kdev_t dev, kdev_t fs_dev,
- int start, int len, int bsize);
-extern journal_t * journal_init_inode (struct inode *);
-extern int journal_update_format (journal_t *);
-extern int journal_check_used_features
- (journal_t *, unsigned long, unsigned long, unsigned long);
-extern int journal_check_available_features
- (journal_t *, unsigned long, unsigned long, unsigned long);
-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_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 (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 unsigned long journal_bmap(journal_t *journal, unsigned long blocknr);
-extern int journal_force_commit(journal_t *journal);
+ if (jfs_has_feature_csum3(journal))
+ return sizeof(journal_block_tag3_t);
-/*
- * journal_head management
- */
-extern struct journal_head
- *journal_add_journal_head(struct buffer_head *bh);
-extern void journal_remove_journal_head(struct buffer_head *bh);
-extern void __journal_remove_journal_head(struct buffer_head *bh);
-extern void journal_unlock_journal_head(struct journal_head *jh);
-
-/* Primary revoke support */
-#define JOURNAL_REVOKE_DEFAULT_HASH 256
-extern int journal_init_revoke(journal_t *, int);
-extern void journal_destroy_revoke_caches(void);
-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 *);
-extern int journal_cancel_revoke(handle_t *, struct journal_head *);
-extern void journal_write_revoke_records(journal_t *, transaction_t *);
-
-/* 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 void journal_clear_revoke(journal_t *);
-extern void journal_brelse_array(struct buffer_head *b[], int n);
-
-/* The log thread user interface:
- *
- * Request space in the current transaction, and force transaction commit
- * transitions on demand.
- */
+ sz = sizeof(journal_block_tag_t);
-extern int log_space_left (journal_t *); /* Called with journal locked */
-extern tid_t log_start_commit (journal_t *, transaction_t *);
-extern void log_wait_commit (journal_t *, tid_t);
-extern int log_do_checkpoint (journal_t *, int);
+ if (jfs_has_feature_csum2(journal))
+ sz += sizeof(__u16);
-extern void log_wait_for_space(journal_t *, int nblocks);
-extern void __journal_drop_transaction(journal_t *, transaction_t *);
-extern int cleanup_journal_tail(journal_t *);
+ if (jfs_has_feature_64bit(journal))
+ return sz;
-/* Reduce journal memory usage by flushing */
-extern void shrink_journal_memory(void);
-
-/* Debugging code only: */
-
-#define jbd_ENOSYS() \
-do { \
- printk (KERN_ERR "JBD unimplemented function " __FUNCTION__); \
- current->state = TASK_UNINTERRUPTIBLE; \
- schedule(); \
-} while (1)
-
-/*
- * is_journal_abort
- *
- * Simple test wrapper function to test the JFS_ABORT state flag. This
- * bit, when set, indicates that we have had a fatal error somewhere,
- * either inside the journaling layer or indicated to us by the client
- * (eg. ext3), and that we and should not commit any further
- * transactions.
- */
-
-static inline int is_journal_aborted(journal_t *journal)
-{
- return journal->j_flags & JFS_ABORT;
+ return sz - sizeof(__u32);
}
-static inline int is_handle_aborted(handle_t *handle)
+_INLINE_ int journal_has_csum_v2or3(journal_t *journal)
{
- if (handle->h_aborted)
+ if (jfs_has_feature_csum2(journal) || jfs_has_feature_csum3(journal))
return 1;
- return is_journal_aborted(handle->h_transaction->t_journal);
-}
-static inline void journal_abort_handle(handle_t *handle)
-{
- handle->h_aborted = 1;
+ return 0;
}
-/* Not all architectures define BUG() */
-#ifndef BUG
-#define BUG() do { \
- printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
- * ((char *) 0) = 0; \
- } while (0)
-#endif /* BUG */
-
-#else
-
-extern int journal_recover (journal_t *journal);
-extern int journal_skip_recovery (journal_t *);
-
-/* Primary revoke support */
-extern int journal_init_revoke(journal_t *, int);
-extern void journal_destroy_revoke_caches(void);
-extern int journal_init_revoke_caches(void);
-
-/* Recovery revoke support */
-extern int journal_set_revoke(journal_t *, unsigned long long, tid_t);
-extern int journal_test_revoke(journal_t *, unsigned long long, tid_t);
-extern void journal_clear_revoke(journal_t *);
-extern void journal_brelse_array(struct buffer_head *b[], int n);
-
-extern void journal_destroy_revoke(journal_t *);
-#endif /* __KERNEL__ */
-
-static inline int tid_gt(tid_t x, tid_t y) EXT2FS_ATTR((unused));
-static inline int tid_geq(tid_t x, tid_t y) EXT2FS_ATTR((unused));
-
/* Comparison functions for transaction IDs: perform comparisons using
* modulo arithmetic so that they work over sequence number wraps. */
-static inline int tid_gt(tid_t x, tid_t y)
+_INLINE_ int tid_gt(tid_t x, tid_t y)
{
int difference = (x - y);
return (difference > 0);
}
-static inline int tid_geq(tid_t x, tid_t y)
+_INLINE_ int tid_geq(tid_t x, tid_t y)
{
int difference = (x - y);
return (difference >= 0);
}
+#endif /* (defined(E2FSCK_INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS)) */
+
+#undef _INLINE_
extern int journal_blocks_per_page(struct inode *inode);
extern int jbd_blocks_per_page(struct inode *inode);
-#ifdef __KERNEL__
-
-extern spinlock_t jh_splice_lock;
-/*
- * Once `expr1' has been found true, take jh_splice_lock
- * and then reevaluate everything.
- */
-#define SPLICE_LOCK(expr1, expr2) \
- ({ \
- int ret = (expr1); \
- if (ret) { \
- spin_lock(&jh_splice_lock); \
- ret = (expr1) && (expr2); \
- spin_unlock(&jh_splice_lock); \
- } \
- ret; \
- })
-
-/*
- * A number of buffer state predicates. They test for
- * buffer_jbd() because they are used in core kernel code.
- *
- * These will be racy on SMP unless we're *sure* that the
- * buffer won't be detached from the journalling system
- * in parallel.
- */
-
-/* Return true if the buffer is on journal list `list' */
-static inline int buffer_jlist_eq(struct buffer_head *bh, int list)
-{
- return SPLICE_LOCK(buffer_jbd(bh), bh2jh(bh)->b_jlist == list);
-}
-
-/* Return true if this bufer is dirty wrt the journal */
-static inline int buffer_jdirty(struct buffer_head *bh)
-{
- return buffer_jbd(bh) && __buffer_state(bh, JBDDirty);
-}
-
-/* Return true if it's a data buffer which journalling is managing */
-static inline int buffer_jbd_data(struct buffer_head *bh)
-{
- return SPLICE_LOCK(buffer_jbd(bh),
- bh2jh(bh)->b_jlist == BJ_SyncData ||
- bh2jh(bh)->b_jlist == BJ_AsyncData);
-}
-
-#ifdef CONFIG_SMP
-#define assert_spin_locked(lock) J_ASSERT(spin_is_locked(lock))
-#else
-#define assert_spin_locked(lock) do {} while(0)
-#endif
-
-#define buffer_trace_init(bh) do {} while (0)
-#define print_buffer_fields(bh) do {} while (0)
-#define print_buffer_trace(bh) do {} while (0)
-#define BUFFER_TRACE(bh, info) do {} while (0)
-#define BUFFER_TRACE2(bh, bh2, info) do {} while (0)
-#define JBUFFER_TRACE(jh, info) do {} while (0)
-
-#endif /* __KERNEL__ */
-
-#endif /* CONFIG_JBD || CONFIG_JBD_MODULE || !__KERNEL__ */
-
-/*
- * Compatibility no-ops which allow the kernel to compile without CONFIG_JBD
- * go here.
- */
-
-#if defined(__KERNEL__) && !(defined(CONFIG_JBD) || defined(CONFIG_JBD_MODULE))
-
-#define J_ASSERT(expr) do {} while (0)
-#define J_ASSERT_BH(bh, expr) do {} while (0)
-#define buffer_jbd(bh) 0
-#define buffer_jlist_eq(bh, val) 0
-#define journal_buffer_journal_lru(bh) 0
-
-#endif /* defined(__KERNEL__) && !defined(CONFIG_JBD) */
#endif /* _LINUX_JBD_H */
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff