X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lib%2Fext2fs%2Fkernel-jbd.h;h=a7507b57b94511ba81f98fcd879752df41423731;hb=9db53e3fec3413572a2240bd374e76353fab9cbe;hp=4d97b7f9137776f2ea23f65cbd3e13de80c8da20;hpb=ed78c021c3b111d8ab9a51aef5d5156e3004083f;p=tools%2Fe2fsprogs.git diff --git a/lib/ext2fs/kernel-jbd.h b/lib/ext2fs/kernel-jbd.h index 4d97b7f..a7507b5 100644 --- a/lib/ext2fs/kernel-jbd.h +++ b/lib/ext2fs/kernel-jbd.h @@ -1,6 +1,6 @@ /* * linux/include/linux/jbd.h - * + * * Written by Stephen C. Tweedie * * Copyright 1998-2000 Red Hat, Inc --- All Rights Reserved @@ -16,19 +16,9 @@ #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 -#include -#include -#endif #ifndef __GNUC__ #define __FUNCTION__ "" @@ -56,10 +46,22 @@ extern int journal_enable_debug; } 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 #endif #else #define jbd_debug(x) /* AIX doesn't do STDC */ @@ -73,11 +75,6 @@ extern void * __jbd_kmalloc (char *where, size_t size, int flags, int retry); #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: */ @@ -88,7 +85,7 @@ typedef struct journal_s journal_t; /* Journal control structure */ * On-disk structures */ -/* +/* * Descriptor block types: */ @@ -108,19 +105,74 @@ typedef struct journal_header_s __u32 h_sequence; } journal_header_t; +/* + * Checksum types. + */ +#define JBD2_CRC32_CHKSUM 1 +#define JBD2_MD5_CHKSUM 2 +#define JBD2_SHA1_CHKSUM 3 +#define JBD2_CRC32C_CHKSUM 4 + +#define JBD2_CRC32_CHKSUM_SIZE 4 -/* - * The block tag: used to describe a single buffer in the journal +#define JBD2_CHECKSUM_BYTES (32 / sizeof(__u32)) +/* + * Commit block header for storing transactional checksums: + * + * NOTE: If FEATURE_COMPAT_CHECKSUM (checksum v1) is set, the h_chksum* + * fields are used to store a checksum of the descriptor and data blocks. + * + * If FEATURE_INCOMPAT_CSUM_V2 (checksum v2) is set, then the h_chksum + * field is used to store crc32c(uuid+commit_block). Each journal metadata + * block gets its own checksum, and data block checksums are stored in + * journal_block_tag (in the descriptor). The other h_chksum* fields are + * not used. + * + * 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. */ -typedef struct journal_block_tag_s +struct commit_header { + __u32 h_magic; + __u32 h_blocktype; + __u32 h_sequence; + unsigned char h_chksum_type; + unsigned char h_chksum_size; + unsigned char h_padding[2]; + __u32 h_chksum[JBD2_CHECKSUM_BYTES]; + __u64 h_commit_sec; + __u32 h_commit_nsec; +}; + +/* + * 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 */ + __u16 t_checksum; /* truncated crc32c(uuid+seq+block) */ + __u16 t_flags; /* See below */ + __u32 t_blocknr_high; /* most-significant high 32bits. */ } journal_block_tag_t; -/* +/* Tail of descriptor block, for checksumming */ +struct journal_block_tail { + __be32 t_checksum; +}; + +/* * The revoke descriptor: used on disk to describe a series of blocks to - * be revoked from the log + * be revoked from the log */ typedef struct journal_revoke_header_s { @@ -128,6 +180,10 @@ typedef struct journal_revoke_header_s int r_count; /* Count of bytes used in the block */ } journal_revoke_header_t; +/* Tail of revoke block, for checksumming */ +struct journal_revoke_tail { + __be32 r_checksum; +}; /* Definitions for the journal tag flags word: */ #define JFS_FLAG_ESCAPE 1 /* on-disk block is escaped */ @@ -136,6 +192,9 @@ typedef struct journal_revoke_header_s #define JFS_FLAG_LAST_TAG 8 /* last tag in this descriptor block */ +#define UUID_SIZE 16 +#define JFS_USERS_MAX 48 +#define JFS_USERS_SIZE (UUID_SIZE * JFS_USERS_MAX) /* * The journal superblock. All fields are in big-endian byte order. */ @@ -149,7 +208,7 @@ typedef struct journal_superblock_s __u32 s_blocksize; /* journal device blocksize */ __u32 s_maxlen; /* total blocks in journal file */ __u32 s_first; /* first block of log information */ - + /* 0x0018 */ /* Dynamic information describing the current state of the log */ __u32 s_sequence; /* first commit ID expected in log */ @@ -169,645 +228,215 @@ typedef struct journal_superblock_s /* 0x0040 */ __u32 s_nr_users; /* Nr of filesystems sharing log */ - + __u32 s_dynsuper; /* Blocknr of dynamic superblock copy*/ - + /* 0x0048 */ __u32 s_max_transaction; /* Limit of journal blocks per trans.*/ __u32 s_max_trans_data; /* Limit of data blocks per trans. */ /* 0x0050 */ - __u32 s_padding[44]; + __u8 s_checksum_type; /* checksum type */ + __u8 s_padding2[3]; + __u32 s_padding[42]; + __u32 s_checksum; /* crc32c(superblock) */ /* 0x0100 */ - __u8 s_users[16*48]; /* ids of all fs'es sharing the log */ + __u8 s_users[JFS_USERS_SIZE]; /* ids of all fs'es sharing the log */ + /* 0x0400 */ } journal_superblock_t; #define JFS_HAS_COMPAT_FEATURE(j,mask) \ ((j)->j_format_version >= 2 && \ - ((j)->j_superblock->s_feature_compat & cpu_to_be32((mask)))) + ((j)->j_superblock->s_feature_compat & ext2fs_cpu_to_be32((mask)))) #define JFS_HAS_RO_COMPAT_FEATURE(j,mask) \ ((j)->j_format_version >= 2 && \ - ((j)->j_superblock->s_feature_ro_compat & cpu_to_be32((mask)))) + ((j)->j_superblock->s_feature_ro_compat & ext2fs_cpu_to_be32((mask)))) #define JFS_HAS_INCOMPAT_FEATURE(j,mask) \ ((j)->j_format_version >= 2 && \ - ((j)->j_superblock->s_feature_incompat & cpu_to_be32((mask)))) + ((j)->j_superblock->s_feature_incompat & ext2fs_cpu_to_be32((mask)))) -#define JFS_FEATURE_INCOMPAT_REVOKE 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_ROCOMPAT_FEATURES 0 -#define JFS_KNOWN_INCOMPAT_FEATURES JFS_FEATURE_INCOMPAT_REVOKE - -#ifdef __KERNEL__ - -#include -#include - -#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) +#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_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 +#if (__STDC_VERSION__ >= 199901L) +#define _INLINE_ extern inline #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); +#define _INLINE_ inline +#endif +#else /* !E2FSCK_INCLUDE_INLINE FUNCS */ +#if (__STDC_VERSION__ >= 199901L) +#define _INLINE_ inline +#else /* not C99 */ +#ifdef __GNUC__ +#define _INLINE_ extern __inline__ +#else /* For Watcom C */ +#define _INLINE_ extern inline +#endif /* __GNUC__ */ +#endif /* __STDC_VERSION__ >= 199901L */ +#endif /* INCLUDE_INLINE_FUNCS */ + +/* 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; - -/* 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 */ -}; - +#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); -/* 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. - */ +#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); -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; -}; +#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); +#endif /* (defined(E2FSCK_INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS)) */ -/* 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. */ +JFS_FEATURE_COMPAT_FUNCS(checksum, CHECKSUM) -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; - - /* Link all journals together - system-wide */ - struct list_head j_all_journals; - - /* The revoke table: maintains the list of revoked blocks in the - current transaction. */ - struct jbd_revoke_table_s *j_revoke; -}; - -/* - * 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 */ - -/* - * Function declarations for the journaling transaction and buffer - * management - */ - -/* 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) +_INLINE_ size_t journal_tag_bytes(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) -{ - return current->journal_info; -} + size_t sz; -/* The journaling code user interface: - * - * Create and destroy handles - * Register buffer modifications against the current transaction. - */ - -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); - -/* - * 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. - */ - -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_csum3(journal)) + return sizeof(journal_block_tag3_t); -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 *); + sz = sizeof(journal_block_tag_t); -/* Reduce journal memory usage by flushing */ -extern void shrink_journal_memory(void); + if (jfs_has_feature_csum2(journal)) + sz += sizeof(__u16); -/* Debugging code only: */ + if (jfs_has_feature_64bit(journal)) + return sz; -#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, 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); - -extern void journal_destroy_revoke(journal_t *); -#endif /* __KERNEL__ */ - /* 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); @@ -826,85 +455,7 @@ extern int journal_blocks_per_page(struct inode *inode); #define BJ_LogCtl 7 /* Buffer contains log descriptors */ #define BJ_Reserved 8 /* Buffer is reserved for access by journal */ #define BJ_Types 9 - -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 +extern int jbd_blocks_per_page(struct inode *inode); -#endif /* defined(__KERNEL__) && !defined(CONFIG_JBD) */ #endif /* _LINUX_JBD_H */