From c500767e1b60241bae4e1ee7bd2b7839287fd5c2 Mon Sep 17 00:00:00 2001 From: Theodore Ts'o Date: Mon, 18 Dec 2000 02:45:32 +0000 Subject: [PATCH] .del-jfs.h~fa6593e8: Remove unneeded file. --- e2fsck/jfs.h | 574 ----------------------------------------------------------- 1 file changed, 574 deletions(-) delete mode 100644 e2fsck/jfs.h diff --git a/e2fsck/jfs.h b/e2fsck/jfs.h deleted file mode 100644 index ba67b62..0000000 --- a/e2fsck/jfs.h +++ /dev/null @@ -1,574 +0,0 @@ -/* - * linux/include/linux/jfs.h - * - * Written by Stephen C. Tweedie , 1998 - * - * Copyright 1998 Red Hat corp --- All Rights Reserved - * - * This file is part of the Linux kernel and is made available under - * the terms of the GNU General Public License, version 2, or at your - * option, any later version, incorporated herein by reference. - * - * Definitions for transaction data structures for the buffer cache - * filesystem journaling support. - */ - -#ifndef _LINUX_JFS_H -#define _LINUX_JFS_H - -#ifndef __KERNEL__ -#include "jfs_compat.h" -#endif - -/* - * Debug code - */ - -/* #define JFS_DEBUG */ - -#ifdef JFS_DEBUG -extern int journal_enable_debug; - -#define jfs_debug(n, f, a...) \ - do { \ - if ((n) <= journal_enable_debug) { \ - printk (KERN_DEBUG "JFS DEBUG: (%s, %d): %s: ", \ - __FILE__, __LINE__, __FUNCTION__); \ - printk (f, ## a); \ - } \ - } while (0) -#else -#define jfs_debug(f, a...) /**/ -#endif - -#define JFS_MIN_JOURNAL_BLOCKS 1024 - -/* - * Internal structures used by the logging mechanism: - */ - -#define JFS_MAGIC_NUMBER 0xc03b3998U /* The first 4 bytes of /dev/random! */ - - -/* - * On-disk structures - */ - -/* - * Descriptor block types: - */ - -#define JFS_DESCRIPTOR_BLOCK 1 -#define JFS_COMMIT_BLOCK 2 -#define JFS_SUPERBLOCK_V1 3 -#define JFS_SUPERBLOCK_V2 4 - -/* - * Standard header for all descriptor blocks: - */ -typedef struct journal_header_s -{ - __u32 h_magic; - __u32 h_blocktype; - __u32 h_sequence; -} journal_header_t; - - -/* - * The block tag: used to describe a single buffer in the journal - */ -typedef struct journal_block_tag_s -{ - __u32 t_blocknr; /* The on-disk block number */ - __u32 t_flags; /* See below */ -} journal_block_tag_t; - -/* Definitions for the journal tag flags word: */ -#define JFS_FLAG_ESCAPE 1 /* on-disk block is escaped */ -#define JFS_FLAG_SAME_UUID 2 /* block has same uuid as previous */ -#define JFS_FLAG_DELETED 4 /* block deleted by this transaction */ -#define JFS_FLAG_LAST_TAG 8 /* last tag in this descriptor block */ - - -/* - * The journal superblock. All fields are in big-endian byte order. - */ -typedef struct journal_superblock_s -{ -/* 0x0000 */ - journal_header_t s_header; - -/* 0x000C */ - /* Static information describing the journal */ - __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 */ - __u32 s_start; /* blocknr of start of log */ - -/* 0x0020 */ - /* Error value, as set by journal_abort(). */ - __s32 s_errno; - -/* 0x0024 */ - /* Remaining fields are only valid in a version-2 superblock */ - __u32 s_feature_compat; /* compatible feature set */ - __u32 s_feature_incompat; /* incompatible feature set */ - __u32 s_feature_ro_compat; /* readonly-compatible feature set */ -/* 0x0030 */ - __u8 s_uuid[16]; /* 128-bit uuid for journal */ - -/* 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]; - -/* 0x0100 */ - __u8 s_users[16*48]; /* 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)))) -#define JFS_HAS_RO_COMPAT_FEATURE(j,mask) \ - ((j)->j_format_version >= 2 && \ - ((j)->j_superblock->s_feature_ro_compat & 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)))) - -#define JFS_FEATURE_INCOMPAT_REVOKE 0x00000001 - -#ifdef __KERNEL__ - -#include - - -#define J_ASSERT(assert) \ - do { if (!(assert)) { \ - printk (KERN_CRIT \ - "Assertion failure in %s() at %s line %d: " \ - "\"%s\"\n", \ - __FUNCTION__, __FILE__, __LINE__, # assert); \ - * ((char *) 0) = 0; \ - } } while (0) - - - -/* 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; - - /* Flags */ - unsigned int h_sync : 1; /* sync-on-close */ - unsigned int h_jdata : 1; /* force data journaling */ -}; - - -/* 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 */ - 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 buffer_head * t_reserved_list; - - /* Doubly-linked circular list of all metadata buffers owned by this - transaction */ - struct buffer_head * t_buffers; - - /* Doubly-linked circular list of all data buffers still to be - flushed before this transaction can be committed */ - struct buffer_head * t_datalist; - - /* Doubly-linked circular list of all forget buffers (superceded - buffers which we can un-checkpoint once this transaction - commits) */ - struct buffer_head * t_forget; - - /* Doubly-linked circular list of all buffers still to be - flushed before this transaction can be checkpointed */ - struct buffer_head * t_checkpoint_list; - - /* Doubly-linked circular list of temporary buffers currently - undergoing IO in the log */ - struct buffer_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 buffer_head * t_shadow_list; - - /* Doubly-linked circular list of control buffers being written - to the log. */ - struct buffer_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; - - /* Wait queue to wait for updates to complete */ - struct wait_queue * t_wait; - - /* Forward and backward links for the circular list of all - * transactions awaiting checkpoint */ - transaction_t *t_cpnext, *t_cpprev; - - /* When will the transaction expire (become due for commit), in - * jiffies ? */ - unsigned long t_expires; -}; - - -/* 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; - - /* 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. */ - transaction_t * j_checkpoint_transactions; - - /* Wait queue for locking of the journal structure. */ - struct wait_queue * j_wait_lock; - - /* Wait queue for waiting for a locked transaction to start - committing */ - struct wait_queue * j_wait_transaction_locked; - - /* Wait queue for waiting for checkpointing to complete */ - struct wait_queue * j_wait_logspace; - - /* Wait queue for waiting for commit to complete */ - struct wait_queue * j_wait_done_commit; - - /* Wait queue to trigger checkpointing */ - struct wait_queue * j_wait_checkpoint; - - /* Wait queue to trigger commit */ - struct wait_queue * j_wait_commit; - - /* Semaphore for locking against concurrent checkpoints */ - struct semaphore j_checkpoint_sem; - - /* Journal running state: */ - /* The lock flag is *NEVER* touched from interrupts. */ - unsigned int j_locked : 1; - - /* 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; - - /* 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; -}; - -/* - * Journal flag definitions - */ -#define JFS_UNMOUNT 1 /* Journal thread is being destroyed */ -#define JFS_SYNC 2 /* Perform synchronous transaction commits */ -#define JFS_ABORT 4 /* Journaling has been aborted for errors. */ -#define JFS_ACK_ERR 8 /* The errno in the sb has been acked */ - -/* - * Journaling internal variables/parameters - */ - -extern int journal_flush_nr_buffers; - - -/* - * Function declarations for the journaling transaction and buffer - * management - */ - -/* Filing buffers */ -extern void journal_unfile_buffer(struct buffer_head *); -extern void journal_refile_buffer(struct buffer_head *); -extern void journal_file_buffer(struct buffer_head *, transaction_t *, int); -extern void journal_clean_data_list(transaction_t *transaction); - -/* Log buffer allocation */ -extern struct buffer_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 */ -extern void journal_remove_checkpoint(struct buffer_head *); -extern void journal_insert_checkpoint(struct buffer_head *, transaction_t *); - -/* Buffer IO */ -extern int -journal_write_metadata_buffer(transaction_t *transaction, - struct buffer_head *bh_in, - struct buffer_head **bh_out, - int blocknr); - -/* Create and destroy transactions */ -extern transaction_t * get_transaction (journal_t *); -extern void put_transaction (transaction_t *); - -/* Notify state transitions (called by the log writer thread): */ -extern int set_transaction_state (transaction_t *, int); - - -/* Transaction locking */ -extern void __wait_on_journal (journal_t *); - -/* Journal locking. In 2.2, we assume that the kernel lock is already - * held. */ -static inline void lock_journal (journal_t * journal) -{ -#ifdef __SMP__ - J_ASSERT(current->lock_depth >= 0); -#endif - if (journal->j_locked) - __wait_on_journal(journal); - journal->j_locked = 1; -} - -static inline int try_lock_journal (journal_t * journal) -{ - if (journal->j_locked) - return 1; - journal->j_locked = 1; - return 0; -} - -static inline void unlock_journal (journal_t * journal) -{ - J_ASSERT (journal->j_locked); - journal->j_locked = 0; - wake_up(&journal->j_wait_lock); -} - -/* This function is gross, but unfortunately we need it as long as - * existing filesystems want to guard against races by testing - * bh->b_count. @@@ Remove this? We no longer abuse b_count so badly! - */ - -static inline int journal_is_buffer_shared(struct buffer_head *bh) -{ - int count = bh->b_count; - J_ASSERT (count >= 1); - return (count > 1); -} - -/* 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 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 *); -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_stop (handle_t *); -extern int journal_flush (journal_t *); -extern int journal_revoke (handle_t *, int); - -extern journal_t * journal_init_dev (kdev_t, 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_features (journal_t *, unsigned long, unsigned long, unsigned long); -extern int journal_create (journal_t *); -extern int journal_load (journal_t *); -extern void journal_release (journal_t *); -extern int journal_recover (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 *); - - -/* 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 void log_start_commit (journal_t *, transaction_t *); -extern void log_wait_commit (journal_t *, tid_t); -extern int log_do_checkpoint (journal_t *, int); - -extern void log_wait_for_space(journal_t *, int nblocks); -extern void journal_drop_transaction(journal_t *, transaction_t *); - - -/* Debugging code only: */ - -#define jfs_ENOSYS() \ -do { \ - printk (KERN_ERR "JFS unimplemented function " __FUNCTION__); \ - current->state = TASK_UNINTERRUPTIBLE; \ - schedule(); \ -} while (1) - -#endif /* __KERNEL__ */ -#endif /* _LINUX_JFS_H */ -- 1.8.3.1