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 struct xfs_log_vec { 22 struct xfs_log_vec *lv_next; /* next lv in build list */ 23 int lv_niovecs; /* number of iovecs in lv */ 24 struct xfs_log_iovec *lv_iovecp; /* iovec array */ 25 struct xfs_log_item *lv_item; /* owner */ 26 char *lv_buf; /* formatted buffer */ 27 int lv_buf_len; /* size of formatted buffer */ 28 int lv_size; /* size of allocated lv */ 29 }; 30 31 #define XFS_LOG_VEC_ORDERED (-1) 32 33 /* 34 * Structure used to pass callback function and the function's argument 35 * to the log manager. 36 */ 37 typedef struct xfs_log_callback { 38 struct xfs_log_callback *cb_next; 39 void (*cb_func)(void *, int); 40 void *cb_arg; 41 } xfs_log_callback_t; 42 43 /* 44 * By comparing each component, we don't have to worry about extra 45 * endian issues in treating two 32 bit numbers as one 64 bit number 46 */ 47 static inline xfs_lsn_t _lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2) 48 { 49 if (CYCLE_LSN(lsn1) != CYCLE_LSN(lsn2)) 50 return (CYCLE_LSN(lsn1)<CYCLE_LSN(lsn2))? -999 : 999; 51 52 if (BLOCK_LSN(lsn1) != BLOCK_LSN(lsn2)) 53 return (BLOCK_LSN(lsn1)<BLOCK_LSN(lsn2))? -999 : 999; 54 55 return 0; 56 } 57 58 #define XFS_LSN_CMP(x,y) _lsn_cmp(x,y) 59 60 /* 61 * Macros, structures, prototypes for interface to the log manager. 62 */ 63 64 /* 65 * Flags to xfs_log_done() 66 */ 67 #define XFS_LOG_REL_PERM_RESERV 0x1 68 69 /* 70 * Flags to xfs_log_force() 71 * 72 * XFS_LOG_SYNC: Synchronous force in-core log to disk 73 */ 74 #define XFS_LOG_SYNC 0x1 75 76 /* Log manager interfaces */ 77 struct xfs_mount; 78 struct xlog_in_core; 79 struct xlog_ticket; 80 struct xfs_log_item; 81 struct xfs_item_ops; 82 struct xfs_trans; 83 struct xfs_log_callback; 84 85 xfs_lsn_t xfs_log_done(struct xfs_mount *mp, 86 struct xlog_ticket *ticket, 87 struct xlog_in_core **iclog, 88 uint flags); 89 int _xfs_log_force(struct xfs_mount *mp, 90 uint flags, 91 int *log_forced); 92 void xfs_log_force(struct xfs_mount *mp, 93 uint flags); 94 int _xfs_log_force_lsn(struct xfs_mount *mp, 95 xfs_lsn_t lsn, 96 uint flags, 97 int *log_forced); 98 void xfs_log_force_lsn(struct xfs_mount *mp, 99 xfs_lsn_t lsn, 100 uint flags); 101 int xfs_log_mount(struct xfs_mount *mp, 102 struct xfs_buftarg *log_target, 103 xfs_daddr_t start_block, 104 int num_bblocks); 105 int xfs_log_mount_finish(struct xfs_mount *mp); 106 xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp); 107 xfs_lsn_t xlog_assign_tail_lsn_locked(struct xfs_mount *mp); 108 void xfs_log_space_wake(struct xfs_mount *mp); 109 int xfs_log_notify(struct xfs_mount *mp, 110 struct xlog_in_core *iclog, 111 struct xfs_log_callback *callback_entry); 112 int xfs_log_release_iclog(struct xfs_mount *mp, 113 struct xlog_in_core *iclog); 114 int xfs_log_reserve(struct xfs_mount *mp, 115 int length, 116 int count, 117 struct xlog_ticket **ticket, 118 __uint8_t clientid, 119 bool permanent, 120 uint t_type); 121 int xfs_log_regrant(struct xfs_mount *mp, struct xlog_ticket *tic); 122 int xfs_log_unmount_write(struct xfs_mount *mp); 123 void xfs_log_unmount(struct xfs_mount *mp); 124 int xfs_log_force_umount(struct xfs_mount *mp, int logerror); 125 int xfs_log_need_covered(struct xfs_mount *mp); 126 127 void xlog_iodone(struct xfs_buf *); 128 129 struct xlog_ticket *xfs_log_ticket_get(struct xlog_ticket *ticket); 130 void xfs_log_ticket_put(struct xlog_ticket *ticket); 131 132 int xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp, 133 xfs_lsn_t *commit_lsn, int flags); 134 bool xfs_log_item_in_current_chkpt(struct xfs_log_item *lip); 135 136 void xfs_log_work_queue(struct xfs_mount *mp); 137 void xfs_log_worker(struct work_struct *work); 138 void xfs_log_quiesce(struct xfs_mount *mp); 139 140 #endif /* __XFS_LOG_H__ */ 141