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 /* get lsn fields */ 22 #define CYCLE_LSN(lsn) ((uint)((lsn)>>32)) 23 #define BLOCK_LSN(lsn) ((uint)(lsn)) 24 25 /* this is used in a spot where we might otherwise double-endian-flip */ 26 #define CYCLE_LSN_DISK(lsn) (((__be32 *)&(lsn))[0]) 27 28 #ifdef __KERNEL__ 29 /* 30 * By comparing each component, we don't have to worry about extra 31 * endian issues in treating two 32 bit numbers as one 64 bit number 32 */ 33 static inline xfs_lsn_t _lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2) 34 { 35 if (CYCLE_LSN(lsn1) != CYCLE_LSN(lsn2)) 36 return (CYCLE_LSN(lsn1)<CYCLE_LSN(lsn2))? -999 : 999; 37 38 if (BLOCK_LSN(lsn1) != BLOCK_LSN(lsn2)) 39 return (BLOCK_LSN(lsn1)<BLOCK_LSN(lsn2))? -999 : 999; 40 41 return 0; 42 } 43 44 #define XFS_LSN_CMP(x,y) _lsn_cmp(x,y) 45 46 /* 47 * Macros, structures, prototypes for interface to the log manager. 48 */ 49 50 /* 51 * Flags to xfs_log_done() 52 */ 53 #define XFS_LOG_REL_PERM_RESERV 0x1 54 55 /* 56 * Flags to xfs_log_force() 57 * 58 * XFS_LOG_SYNC: Synchronous force in-core log to disk 59 */ 60 #define XFS_LOG_SYNC 0x1 61 62 #endif /* __KERNEL__ */ 63 64 65 /* Log Clients */ 66 #define XFS_TRANSACTION 0x69 67 #define XFS_VOLUME 0x2 68 #define XFS_LOG 0xaa 69 70 71 /* Region types for iovec's i_type */ 72 #define XLOG_REG_TYPE_BFORMAT 1 73 #define XLOG_REG_TYPE_BCHUNK 2 74 #define XLOG_REG_TYPE_EFI_FORMAT 3 75 #define XLOG_REG_TYPE_EFD_FORMAT 4 76 #define XLOG_REG_TYPE_IFORMAT 5 77 #define XLOG_REG_TYPE_ICORE 6 78 #define XLOG_REG_TYPE_IEXT 7 79 #define XLOG_REG_TYPE_IBROOT 8 80 #define XLOG_REG_TYPE_ILOCAL 9 81 #define XLOG_REG_TYPE_IATTR_EXT 10 82 #define XLOG_REG_TYPE_IATTR_BROOT 11 83 #define XLOG_REG_TYPE_IATTR_LOCAL 12 84 #define XLOG_REG_TYPE_QFORMAT 13 85 #define XLOG_REG_TYPE_DQUOT 14 86 #define XLOG_REG_TYPE_QUOTAOFF 15 87 #define XLOG_REG_TYPE_LRHEADER 16 88 #define XLOG_REG_TYPE_UNMOUNT 17 89 #define XLOG_REG_TYPE_COMMIT 18 90 #define XLOG_REG_TYPE_TRANSHDR 19 91 #define XLOG_REG_TYPE_MAX 19 92 93 typedef struct xfs_log_iovec { 94 void *i_addr; /* beginning address of region */ 95 int i_len; /* length in bytes of region */ 96 uint i_type; /* type of region */ 97 } xfs_log_iovec_t; 98 99 struct xfs_log_vec { 100 struct xfs_log_vec *lv_next; /* next lv in build list */ 101 int lv_niovecs; /* number of iovecs in lv */ 102 struct xfs_log_iovec *lv_iovecp; /* iovec array */ 103 struct xfs_log_item *lv_item; /* owner */ 104 char *lv_buf; /* formatted buffer */ 105 int lv_buf_len; /* size of formatted buffer */ 106 }; 107 108 /* 109 * Structure used to pass callback function and the function's argument 110 * to the log manager. 111 */ 112 typedef struct xfs_log_callback { 113 struct xfs_log_callback *cb_next; 114 void (*cb_func)(void *, int); 115 void *cb_arg; 116 } xfs_log_callback_t; 117 118 119 #ifdef __KERNEL__ 120 /* Log manager interfaces */ 121 struct xfs_mount; 122 struct xlog_in_core; 123 struct xlog_ticket; 124 struct xfs_log_item; 125 struct xfs_item_ops; 126 struct xfs_trans; 127 128 void xfs_log_item_init(struct xfs_mount *mp, 129 struct xfs_log_item *item, 130 int type, 131 const struct xfs_item_ops *ops); 132 133 xfs_lsn_t xfs_log_done(struct xfs_mount *mp, 134 struct xlog_ticket *ticket, 135 struct xlog_in_core **iclog, 136 uint flags); 137 int _xfs_log_force(struct xfs_mount *mp, 138 uint flags, 139 int *log_forced); 140 void xfs_log_force(struct xfs_mount *mp, 141 uint flags); 142 int _xfs_log_force_lsn(struct xfs_mount *mp, 143 xfs_lsn_t lsn, 144 uint flags, 145 int *log_forced); 146 void xfs_log_force_lsn(struct xfs_mount *mp, 147 xfs_lsn_t lsn, 148 uint flags); 149 int xfs_log_mount(struct xfs_mount *mp, 150 struct xfs_buftarg *log_target, 151 xfs_daddr_t start_block, 152 int num_bblocks); 153 int xfs_log_mount_finish(struct xfs_mount *mp); 154 xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp); 155 xfs_lsn_t xlog_assign_tail_lsn_locked(struct xfs_mount *mp); 156 void xfs_log_space_wake(struct xfs_mount *mp); 157 int xfs_log_notify(struct xfs_mount *mp, 158 struct xlog_in_core *iclog, 159 xfs_log_callback_t *callback_entry); 160 int xfs_log_release_iclog(struct xfs_mount *mp, 161 struct xlog_in_core *iclog); 162 int xfs_log_reserve(struct xfs_mount *mp, 163 int length, 164 int count, 165 struct xlog_ticket **ticket, 166 __uint8_t clientid, 167 bool permanent, 168 uint t_type); 169 int xfs_log_regrant(struct xfs_mount *mp, struct xlog_ticket *tic); 170 int xfs_log_unmount_write(struct xfs_mount *mp); 171 void xfs_log_unmount(struct xfs_mount *mp); 172 int xfs_log_force_umount(struct xfs_mount *mp, int logerror); 173 int xfs_log_need_covered(struct xfs_mount *mp); 174 175 void xlog_iodone(struct xfs_buf *); 176 177 struct xlog_ticket *xfs_log_ticket_get(struct xlog_ticket *ticket); 178 void xfs_log_ticket_put(struct xlog_ticket *ticket); 179 180 int xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp, 181 xfs_lsn_t *commit_lsn, int flags); 182 bool xfs_log_item_in_current_chkpt(struct xfs_log_item *lip); 183 184 void xfs_log_work_queue(struct xfs_mount *mp); 185 void xfs_log_worker(struct work_struct *work); 186 void xfs_log_quiesce(struct xfs_mount *mp); 187 188 #endif 189 #endif /* __XFS_LOG_H__ */ 190