diff options
Diffstat (limited to 'fs/xfs/xfs_log.h')
| -rw-r--r-- | fs/xfs/xfs_log.h | 277 |
1 files changed, 126 insertions, 151 deletions
diff --git a/fs/xfs/xfs_log.h b/fs/xfs/xfs_log.h index 18961119fc6..84e0deb95ab 100644 --- a/fs/xfs/xfs_log.h +++ b/fs/xfs/xfs_log.h @@ -1,56 +1,103 @@ /* - * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved. + * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. + * All Rights Reserved. * - * This program is free software; you can redistribute it and/or modify it - * under the terms of version 2 of the GNU General Public License as + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation. * - * This program is distributed in the hope that it would be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. * - * Further, this software is distributed without any warranty that it is - * free of the rightful claim of any third person regarding infringement - * or the like. Any license provided herein, whether implied or - * otherwise, applies only to this software file. Patent licenses, if - * any, provided herein do not apply to combinations of this program with - * other software, or any other product whatsoever. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write the Free Software Foundation, Inc., 59 - * Temple Place - Suite 330, Boston MA 02111-1307, USA. - * - * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, - * Mountain View, CA 94043, or: - * - * http://www.sgi.com - * - * For further information regarding this notice, see: - * - * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ + * You should have received a copy of the GNU General Public License + * along with this program; if not, write the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef __XFS_LOG_H__ #define __XFS_LOG_H__ -/* get lsn fields */ +struct xfs_log_vec { + struct xfs_log_vec *lv_next; /* next lv in build list */ + int lv_niovecs; /* number of iovecs in lv */ + struct xfs_log_iovec *lv_iovecp; /* iovec array */ + struct xfs_log_item *lv_item; /* owner */ + char *lv_buf; /* formatted buffer */ + int lv_bytes; /* accounted space in buffer */ + int lv_buf_len; /* aligned size of buffer */ + int lv_size; /* size of allocated lv */ +}; + +#define XFS_LOG_VEC_ORDERED (-1) + +static inline void * +xlog_prepare_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec **vecp, + uint type) +{ + struct xfs_log_iovec *vec = *vecp; + + if (vec) { + ASSERT(vec - lv->lv_iovecp < lv->lv_niovecs); + vec++; + } else { + vec = &lv->lv_iovecp[0]; + } -#define CYCLE_LSN(lsn) ((uint)((lsn)>>32)) -#define BLOCK_LSN(lsn) ((uint)(lsn)) -/* this is used in a spot where we might otherwise double-endian-flip */ -#define CYCLE_LSN_DISK(lsn) (((uint *)&(lsn))[0]) + vec->i_type = type; + vec->i_addr = lv->lv_buf + lv->lv_buf_len; + + ASSERT(IS_ALIGNED((unsigned long)vec->i_addr, sizeof(uint64_t))); + + *vecp = vec; + return vec->i_addr; +} -#ifdef __KERNEL__ /* - * By comparing each compnent, we don't have to worry about extra + * We need to make sure the next buffer is naturally aligned for the biggest + * basic data type we put into it. We already accounted for this padding when + * sizing the buffer. + * + * However, this padding does not get written into the log, and hence we have to + * track the space used by the log vectors separately to prevent log space hangs + * due to inaccurate accounting (i.e. a leak) of the used log space through the + * CIL context ticket. + */ +static inline void +xlog_finish_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec *vec, int len) +{ + lv->lv_buf_len += round_up(len, sizeof(uint64_t)); + lv->lv_bytes += len; + vec->i_len = len; +} + +static inline void * +xlog_copy_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec **vecp, + uint type, void *data, int len) +{ + void *buf; + + buf = xlog_prepare_iovec(lv, vecp, type); + memcpy(buf, data, len); + xlog_finish_iovec(lv, *vecp, len); + return buf; +} + +/* + * Structure used to pass callback function and the function's argument + * to the log manager. + */ +typedef struct xfs_log_callback { + struct xfs_log_callback *cb_next; + void (*cb_func)(void *, int); + void *cb_arg; +} xfs_log_callback_t; + +/* + * By comparing each component, we don't have to worry about extra * endian issues in treating two 32 bit numbers as one 64 bit number */ -static -#if defined(__GNUC__) && (__GNUC__ == 2) && ( (__GNUC_MINOR__ == 95) || (__GNUC_MINOR__ == 96)) -__attribute__((unused)) /* gcc 2.95, 2.96 miscompile this when inlined */ -#else -__inline__ -#endif -xfs_lsn_t _lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2) +static inline xfs_lsn_t _lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2) { if (CYCLE_LSN(lsn1) != CYCLE_LSN(lsn2)) return (CYCLE_LSN(lsn1)<CYCLE_LSN(lsn2))? -999 : 999; @@ -68,151 +115,79 @@ xfs_lsn_t _lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2) */ /* - * Flags to xfs_log_mount - */ -#define XFS_LOG_RECOVER 0x1 - -/* * Flags to xfs_log_done() */ #define XFS_LOG_REL_PERM_RESERV 0x1 - -/* - * Flags to xfs_log_reserve() - * - * XFS_LOG_SLEEP: If space is not available, sleep (default) - * XFS_LOG_NOSLEEP: If space is not available, return error - * XFS_LOG_PERM_RESERV: Permanent reservation. When writes are - * performed against this type of reservation, the reservation - * is not decreased. Long running transactions should use this. - */ -#define XFS_LOG_SLEEP 0x0 -#define XFS_LOG_NOSLEEP 0x1 -#define XFS_LOG_PERM_RESERV 0x2 -#define XFS_LOG_RESV_ALL (XFS_LOG_NOSLEEP|XFS_LOG_PERM_RESERV) - - /* * Flags to xfs_log_force() * * XFS_LOG_SYNC: Synchronous force in-core log to disk - * XFS_LOG_FORCE: Start in-core log write now. - * XFS_LOG_URGE: Start write within some window of time. - * - * Note: Either XFS_LOG_FORCE or XFS_LOG_URGE must be set. */ #define XFS_LOG_SYNC 0x1 -#define XFS_LOG_FORCE 0x2 -#define XFS_LOG_URGE 0x4 - -#endif /* __KERNEL__ */ - - -/* Log Clients */ -#define XFS_TRANSACTION 0x69 -#define XFS_VOLUME 0x2 -#define XFS_LOG 0xaa - - -/* Region types for iovec's i_type */ -#if defined(XFS_LOG_RES_DEBUG) -#define XLOG_REG_TYPE_BFORMAT 1 -#define XLOG_REG_TYPE_BCHUNK 2 -#define XLOG_REG_TYPE_EFI_FORMAT 3 -#define XLOG_REG_TYPE_EFD_FORMAT 4 -#define XLOG_REG_TYPE_IFORMAT 5 -#define XLOG_REG_TYPE_ICORE 6 -#define XLOG_REG_TYPE_IEXT 7 -#define XLOG_REG_TYPE_IBROOT 8 -#define XLOG_REG_TYPE_ILOCAL 9 -#define XLOG_REG_TYPE_IATTR_EXT 10 -#define XLOG_REG_TYPE_IATTR_BROOT 11 -#define XLOG_REG_TYPE_IATTR_LOCAL 12 -#define XLOG_REG_TYPE_QFORMAT 13 -#define XLOG_REG_TYPE_DQUOT 14 -#define XLOG_REG_TYPE_QUOTAOFF 15 -#define XLOG_REG_TYPE_LRHEADER 16 -#define XLOG_REG_TYPE_UNMOUNT 17 -#define XLOG_REG_TYPE_COMMIT 18 -#define XLOG_REG_TYPE_TRANSHDR 19 -#define XLOG_REG_TYPE_MAX 19 -#endif - -#if defined(XFS_LOG_RES_DEBUG) -#define XLOG_VEC_SET_TYPE(vecp, t) ((vecp)->i_type = (t)) -#else -#define XLOG_VEC_SET_TYPE(vecp, t) -#endif - - -typedef struct xfs_log_iovec { - xfs_caddr_t i_addr; /* beginning address of region */ - int i_len; /* length in bytes of region */ -#if defined(XFS_LOG_RES_DEBUG) - uint i_type; /* type of region */ -#endif -} xfs_log_iovec_t; - -typedef void* xfs_log_ticket_t; -/* - * Structure used to pass callback function and the function's argument - * to the log manager. - */ -typedef struct xfs_log_callback { - struct xfs_log_callback *cb_next; - void (*cb_func)(void *, int); - void *cb_arg; -} xfs_log_callback_t; - - -#ifdef __KERNEL__ /* Log manager interfaces */ struct xfs_mount; +struct xlog_in_core; +struct xlog_ticket; +struct xfs_log_item; +struct xfs_item_ops; +struct xfs_trans; +struct xfs_log_callback; + xfs_lsn_t xfs_log_done(struct xfs_mount *mp, - xfs_log_ticket_t ticket, - void **iclog, + struct xlog_ticket *ticket, + struct xlog_in_core **iclog, uint flags); -int xfs_log_force(struct xfs_mount *mp, - xfs_lsn_t lsn, - uint flags); +int _xfs_log_force(struct xfs_mount *mp, + uint flags, + int *log_forced); +void xfs_log_force(struct xfs_mount *mp, + uint flags); +int _xfs_log_force_lsn(struct xfs_mount *mp, + xfs_lsn_t lsn, + uint flags, + int *log_forced); +void xfs_log_force_lsn(struct xfs_mount *mp, + xfs_lsn_t lsn, + uint flags); int xfs_log_mount(struct xfs_mount *mp, struct xfs_buftarg *log_target, xfs_daddr_t start_block, int num_bblocks); -int xfs_log_mount_finish(struct xfs_mount *mp, int); -void xfs_log_move_tail(struct xfs_mount *mp, - xfs_lsn_t tail_lsn); +int xfs_log_mount_finish(struct xfs_mount *mp); +xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp); +xfs_lsn_t xlog_assign_tail_lsn_locked(struct xfs_mount *mp); +void xfs_log_space_wake(struct xfs_mount *mp); int xfs_log_notify(struct xfs_mount *mp, - void *iclog, - xfs_log_callback_t *callback_entry); + struct xlog_in_core *iclog, + struct xfs_log_callback *callback_entry); int xfs_log_release_iclog(struct xfs_mount *mp, - void *iclog_hndl); + struct xlog_in_core *iclog); int xfs_log_reserve(struct xfs_mount *mp, int length, int count, - xfs_log_ticket_t *ticket, + struct xlog_ticket **ticket, __uint8_t clientid, - uint flags, + bool permanent, uint t_type); -int xfs_log_write(struct xfs_mount *mp, - xfs_log_iovec_t region[], - int nentries, - xfs_log_ticket_t ticket, - xfs_lsn_t *start_lsn); -int xfs_log_unmount(struct xfs_mount *mp); +int xfs_log_regrant(struct xfs_mount *mp, struct xlog_ticket *tic); int xfs_log_unmount_write(struct xfs_mount *mp); -void xfs_log_unmount_dealloc(struct xfs_mount *mp); +void xfs_log_unmount(struct xfs_mount *mp); int xfs_log_force_umount(struct xfs_mount *mp, int logerror); int xfs_log_need_covered(struct xfs_mount *mp); void xlog_iodone(struct xfs_buf *); -#endif - +struct xlog_ticket *xfs_log_ticket_get(struct xlog_ticket *ticket); +void xfs_log_ticket_put(struct xlog_ticket *ticket); -extern int xlog_debug; /* set to 1 to enable real log */ +void xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp, + xfs_lsn_t *commit_lsn, int flags); +bool xfs_log_item_in_current_chkpt(struct xfs_log_item *lip); +void xfs_log_work_queue(struct xfs_mount *mp); +void xfs_log_worker(struct work_struct *work); +void xfs_log_quiesce(struct xfs_mount *mp); #endif /* __XFS_LOG_H__ */ |