| 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 | |
| 23 | #define CYCLE_LSN(lsn) ((uint)((lsn)>>32)) |
| 24 | #define BLOCK_LSN(lsn) ((uint)(lsn)) |
| 25 | |
| 26 | /* this is used in a spot where we might otherwise double-endian-flip */ |
| 27 | #define CYCLE_LSN_DISK(lsn) (((__be32 *)&(lsn))[0]) |
| 28 | |
| 29 | #ifdef __KERNEL__ |
| 30 | /* |
| 31 | * By comparing each component, we don't have to worry about extra |
| 32 | * endian issues in treating two 32 bit numbers as one 64 bit number |
| 33 | */ |
| 34 | static inline xfs_lsn_t _lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2) |
| 35 | { |
| 36 | if (CYCLE_LSN(lsn1) != CYCLE_LSN(lsn2)) |
| 37 | return (CYCLE_LSN(lsn1)<CYCLE_LSN(lsn2))? -999 : 999; |
| 38 | |
| 39 | if (BLOCK_LSN(lsn1) != BLOCK_LSN(lsn2)) |
| 40 | return (BLOCK_LSN(lsn1)<BLOCK_LSN(lsn2))? -999 : 999; |
| 41 | |
| 42 | return 0; |
| 43 | } |
| 44 | |
| 45 | #define XFS_LSN_CMP(x,y) _lsn_cmp(x,y) |
| 46 | |
| 47 | /* |
| 48 | * Macros, structures, prototypes for interface to the log manager. |
| 49 | */ |
| 50 | |
| 51 | /* |
| 52 | * Flags to xfs_log_done() |
| 53 | */ |
| 54 | #define XFS_LOG_REL_PERM_RESERV 0x1 |
| 55 | |
| 56 | /* |
| 57 | * Flags to xfs_log_reserve() |
| 58 | * |
| 59 | * XFS_LOG_SLEEP: If space is not available, sleep (default) |
| 60 | * XFS_LOG_NOSLEEP: If space is not available, return error |
| 61 | * XFS_LOG_PERM_RESERV: Permanent reservation. When writes are |
| 62 | * performed against this type of reservation, the reservation |
| 63 | * is not decreased. Long running transactions should use this. |
| 64 | */ |
| 65 | #define XFS_LOG_SLEEP 0x0 |
| 66 | #define XFS_LOG_NOSLEEP 0x1 |
| 67 | #define XFS_LOG_PERM_RESERV 0x2 |
| 68 | |
| 69 | /* |
| 70 | * Flags to xfs_log_force() |
| 71 | * |
| 72 | * XFS_LOG_SYNC: Synchronous force in-core log to disk |
| 73 | * XFS_LOG_FORCE: Start in-core log write now. |
| 74 | * XFS_LOG_URGE: Start write within some window of time. |
| 75 | * |
| 76 | * Note: Either XFS_LOG_FORCE or XFS_LOG_URGE must be set. |
| 77 | */ |
| 78 | #define XFS_LOG_SYNC 0x1 |
| 79 | #define XFS_LOG_FORCE 0x2 |
| 80 | #define XFS_LOG_URGE 0x4 |
| 81 | |
| 82 | #endif /* __KERNEL__ */ |
| 83 | |
| 84 | |
| 85 | /* Log Clients */ |
| 86 | #define XFS_TRANSACTION 0x69 |
| 87 | #define XFS_VOLUME 0x2 |
| 88 | #define XFS_LOG 0xaa |
| 89 | |
| 90 | |
| 91 | /* Region types for iovec's i_type */ |
| 92 | #define XLOG_REG_TYPE_BFORMAT 1 |
| 93 | #define XLOG_REG_TYPE_BCHUNK 2 |
| 94 | #define XLOG_REG_TYPE_EFI_FORMAT 3 |
| 95 | #define XLOG_REG_TYPE_EFD_FORMAT 4 |
| 96 | #define XLOG_REG_TYPE_IFORMAT 5 |
| 97 | #define XLOG_REG_TYPE_ICORE 6 |
| 98 | #define XLOG_REG_TYPE_IEXT 7 |
| 99 | #define XLOG_REG_TYPE_IBROOT 8 |
| 100 | #define XLOG_REG_TYPE_ILOCAL 9 |
| 101 | #define XLOG_REG_TYPE_IATTR_EXT 10 |
| 102 | #define XLOG_REG_TYPE_IATTR_BROOT 11 |
| 103 | #define XLOG_REG_TYPE_IATTR_LOCAL 12 |
| 104 | #define XLOG_REG_TYPE_QFORMAT 13 |
| 105 | #define XLOG_REG_TYPE_DQUOT 14 |
| 106 | #define XLOG_REG_TYPE_QUOTAOFF 15 |
| 107 | #define XLOG_REG_TYPE_LRHEADER 16 |
| 108 | #define XLOG_REG_TYPE_UNMOUNT 17 |
| 109 | #define XLOG_REG_TYPE_COMMIT 18 |
| 110 | #define XLOG_REG_TYPE_TRANSHDR 19 |
| 111 | #define XLOG_REG_TYPE_MAX 19 |
| 112 | |
| 113 | #define XLOG_VEC_SET_TYPE(vecp, t) ((vecp)->i_type = (t)) |
| 114 | |
| 115 | typedef struct xfs_log_iovec { |
| 116 | xfs_caddr_t i_addr; /* beginning address of region */ |
| 117 | int i_len; /* length in bytes of region */ |
| 118 | uint i_type; /* type of region */ |
| 119 | } xfs_log_iovec_t; |
| 120 | |
| 121 | typedef void* xfs_log_ticket_t; |
| 122 | |
| 123 | /* |
| 124 | * Structure used to pass callback function and the function's argument |
| 125 | * to the log manager. |
| 126 | */ |
| 127 | typedef struct xfs_log_callback { |
| 128 | struct xfs_log_callback *cb_next; |
| 129 | void (*cb_func)(void *, int); |
| 130 | void *cb_arg; |
| 131 | } xfs_log_callback_t; |
| 132 | |
| 133 | |
| 134 | #ifdef __KERNEL__ |
| 135 | /* Log manager interfaces */ |
| 136 | struct xfs_mount; |
| 137 | struct xlog_ticket; |
| 138 | xfs_lsn_t xfs_log_done(struct xfs_mount *mp, |
| 139 | xfs_log_ticket_t ticket, |
| 140 | void **iclog, |
| 141 | uint flags); |
| 142 | int _xfs_log_force(struct xfs_mount *mp, |
| 143 | xfs_lsn_t lsn, |
| 144 | uint flags, |
| 145 | int *log_forced); |
| 146 | void xfs_log_force(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 | void xfs_log_move_tail(struct xfs_mount *mp, |
| 155 | xfs_lsn_t tail_lsn); |
| 156 | int xfs_log_notify(struct xfs_mount *mp, |
| 157 | void *iclog, |
| 158 | xfs_log_callback_t *callback_entry); |
| 159 | int xfs_log_release_iclog(struct xfs_mount *mp, |
| 160 | void *iclog_hndl); |
| 161 | int xfs_log_reserve(struct xfs_mount *mp, |
| 162 | int length, |
| 163 | int count, |
| 164 | xfs_log_ticket_t *ticket, |
| 165 | __uint8_t clientid, |
| 166 | uint flags, |
| 167 | uint t_type); |
| 168 | int xfs_log_write(struct xfs_mount *mp, |
| 169 | xfs_log_iovec_t region[], |
| 170 | int nentries, |
| 171 | xfs_log_ticket_t ticket, |
| 172 | xfs_lsn_t *start_lsn); |
| 173 | int xfs_log_unmount_write(struct xfs_mount *mp); |
| 174 | void xfs_log_unmount(struct xfs_mount *mp); |
| 175 | int xfs_log_force_umount(struct xfs_mount *mp, int logerror); |
| 176 | int xfs_log_need_covered(struct xfs_mount *mp); |
| 177 | |
| 178 | void xlog_iodone(struct xfs_buf *); |
| 179 | |
| 180 | struct xlog_ticket * xfs_log_ticket_get(struct xlog_ticket *ticket); |
| 181 | void xfs_log_ticket_put(struct xlog_ticket *ticket); |
| 182 | |
| 183 | #endif |
| 184 | |
| 185 | |
| 186 | extern int xlog_debug; /* set to 1 to enable real log */ |
| 187 | |
| 188 | |
| 189 | #endif /* __XFS_LOG_H__ */ |