1 /* 2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #ifndef __XFS_LOG_H__ 19 #define __XFS_LOG_H__ 20 21 #include "xfs_log_format.h" 22 23 struct xfs_log_vec { 24 struct xfs_log_vec *lv_next; /* next lv in build list */ 25 int lv_niovecs; /* number of iovecs in lv */ 26 struct xfs_log_iovec *lv_iovecp; /* iovec array */ 27 struct xfs_log_item *lv_item; /* owner */ 28 char *lv_buf; /* formatted buffer */ 29 int lv_buf_len; /* size of formatted buffer */ 30 int lv_size; /* size of allocated lv */ 31 }; 32 33 #define XFS_LOG_VEC_ORDERED (-1) 34 35 /* 36 * Structure used to pass callback function and the function's argument 37 * to the log manager. 38 */ 39 typedef struct xfs_log_callback { 40 struct xfs_log_callback *cb_next; 41 void (*cb_func)(void *, int); 42 void *cb_arg; 43 } xfs_log_callback_t; 44 45 /* 46 * By comparing each component, we don't have to worry about extra 47 * endian issues in treating two 32 bit numbers as one 64 bit number 48 */ 49 static inline xfs_lsn_t _lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2) 50 { 51 if (CYCLE_LSN(lsn1) != CYCLE_LSN(lsn2)) 52 return (CYCLE_LSN(lsn1)<CYCLE_LSN(lsn2))? -999 : 999; 53 54 if (BLOCK_LSN(lsn1) != BLOCK_LSN(lsn2)) 55 return (BLOCK_LSN(lsn1)<BLOCK_LSN(lsn2))? -999 : 999; 56 57 return 0; 58 } 59 60 #define XFS_LSN_CMP(x,y) _lsn_cmp(x,y) 61 62 /* 63 * Macros, structures, prototypes for interface to the log manager. 64 */ 65 66 /* 67 * Flags to xfs_log_done() 68 */ 69 #define XFS_LOG_REL_PERM_RESERV 0x1 70 71 /* 72 * Flags to xfs_log_force() 73 * 74 * XFS_LOG_SYNC: Synchronous force in-core log to disk 75 */ 76 #define XFS_LOG_SYNC 0x1 77 78 /* Log manager interfaces */ 79 struct xfs_mount; 80 struct xlog_in_core; 81 struct xlog_ticket; 82 struct xfs_log_item; 83 struct xfs_item_ops; 84 struct xfs_trans; 85 86 void xfs_log_item_init(struct xfs_mount *mp, 87 struct xfs_log_item *item, 88 int type, 89 const struct xfs_item_ops *ops); 90 91 xfs_lsn_t xfs_log_done(struct xfs_mount *mp, 92 struct xlog_ticket *ticket, 93 struct xlog_in_core **iclog, 94 uint flags); 95 int _xfs_log_force(struct xfs_mount *mp, 96 uint flags, 97 int *log_forced); 98 void xfs_log_force(struct xfs_mount *mp, 99 uint flags); 100 int _xfs_log_force_lsn(struct xfs_mount *mp, 101 xfs_lsn_t lsn, 102 uint flags, 103 int *log_forced); 104 void xfs_log_force_lsn(struct xfs_mount *mp, 105 xfs_lsn_t lsn, 106 uint flags); 107 int xfs_log_mount(struct xfs_mount *mp, 108 struct xfs_buftarg *log_target, 109 xfs_daddr_t start_block, 110 int num_bblocks); 111 int xfs_log_mount_finish(struct xfs_mount *mp); 112 xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp); 113 xfs_lsn_t xlog_assign_tail_lsn_locked(struct xfs_mount *mp); 114 void xfs_log_space_wake(struct xfs_mount *mp); 115 int xfs_log_notify(struct xfs_mount *mp, 116 struct xlog_in_core *iclog, 117 xfs_log_callback_t *callback_entry); 118 int xfs_log_release_iclog(struct xfs_mount *mp, 119 struct xlog_in_core *iclog); 120 int xfs_log_reserve(struct xfs_mount *mp, 121 int length, 122 int count, 123 struct xlog_ticket **ticket, 124 __uint8_t clientid, 125 bool permanent, 126 uint t_type); 127 int xfs_log_regrant(struct xfs_mount *mp, struct xlog_ticket *tic); 128 int xfs_log_unmount_write(struct xfs_mount *mp); 129 void xfs_log_unmount(struct xfs_mount *mp); 130 int xfs_log_force_umount(struct xfs_mount *mp, int logerror); 131 int xfs_log_need_covered(struct xfs_mount *mp); 132 133 void xlog_iodone(struct xfs_buf *); 134 135 struct xlog_ticket *xfs_log_ticket_get(struct xlog_ticket *ticket); 136 void xfs_log_ticket_put(struct xlog_ticket *ticket); 137 138 int xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp, 139 xfs_lsn_t *commit_lsn, int flags); 140 bool xfs_log_item_in_current_chkpt(struct xfs_log_item *lip); 141 142 void xfs_log_work_queue(struct xfs_mount *mp); 143 void xfs_log_worker(struct work_struct *work); 144 void xfs_log_quiesce(struct xfs_mount *mp); 145 146 #endif /* __XFS_LOG_H__ */ 147