2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
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.
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.
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
23 #define CYCLE_LSN(lsn) ((uint)((lsn)>>32))
24 #define BLOCK_LSN(lsn) ((uint)(lsn))
25 /* this is used in a spot where we might otherwise double-endian-flip */
26 #define CYCLE_LSN_DISK(lsn) (((uint *)&(lsn))[0])
30 * By comparing each compnent, we don't have to worry about extra
31 * endian issues in treating two 32 bit numbers as one 64 bit number
33 static inline xfs_lsn_t _lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2)
35 if (CYCLE_LSN(lsn1) != CYCLE_LSN(lsn2))
36 return (CYCLE_LSN(lsn1)<CYCLE_LSN(lsn2))? -999 : 999;
38 if (BLOCK_LSN(lsn1) != BLOCK_LSN(lsn2))
39 return (BLOCK_LSN(lsn1)<BLOCK_LSN(lsn2))? -999 : 999;
44 #define XFS_LSN_CMP(x,y) _lsn_cmp(x,y)
47 * Macros, structures, prototypes for interface to the log manager.
51 * Flags to xfs_log_mount
53 #define XFS_LOG_RECOVER 0x1
56 * Flags to xfs_log_done()
58 #define XFS_LOG_REL_PERM_RESERV 0x1
62 * Flags to xfs_log_reserve()
64 * XFS_LOG_SLEEP: If space is not available, sleep (default)
65 * XFS_LOG_NOSLEEP: If space is not available, return error
66 * XFS_LOG_PERM_RESERV: Permanent reservation. When writes are
67 * performed against this type of reservation, the reservation
68 * is not decreased. Long running transactions should use this.
70 #define XFS_LOG_SLEEP 0x0
71 #define XFS_LOG_NOSLEEP 0x1
72 #define XFS_LOG_PERM_RESERV 0x2
73 #define XFS_LOG_RESV_ALL (XFS_LOG_NOSLEEP|XFS_LOG_PERM_RESERV)
77 * Flags to xfs_log_force()
79 * XFS_LOG_SYNC: Synchronous force in-core log to disk
80 * XFS_LOG_FORCE: Start in-core log write now.
81 * XFS_LOG_URGE: Start write within some window of time.
83 * Note: Either XFS_LOG_FORCE or XFS_LOG_URGE must be set.
85 #define XFS_LOG_SYNC 0x1
86 #define XFS_LOG_FORCE 0x2
87 #define XFS_LOG_URGE 0x4
89 #endif /* __KERNEL__ */
93 #define XFS_TRANSACTION 0x69
94 #define XFS_VOLUME 0x2
98 /* Region types for iovec's i_type */
99 #define XLOG_REG_TYPE_BFORMAT 1
100 #define XLOG_REG_TYPE_BCHUNK 2
101 #define XLOG_REG_TYPE_EFI_FORMAT 3
102 #define XLOG_REG_TYPE_EFD_FORMAT 4
103 #define XLOG_REG_TYPE_IFORMAT 5
104 #define XLOG_REG_TYPE_ICORE 6
105 #define XLOG_REG_TYPE_IEXT 7
106 #define XLOG_REG_TYPE_IBROOT 8
107 #define XLOG_REG_TYPE_ILOCAL 9
108 #define XLOG_REG_TYPE_IATTR_EXT 10
109 #define XLOG_REG_TYPE_IATTR_BROOT 11
110 #define XLOG_REG_TYPE_IATTR_LOCAL 12
111 #define XLOG_REG_TYPE_QFORMAT 13
112 #define XLOG_REG_TYPE_DQUOT 14
113 #define XLOG_REG_TYPE_QUOTAOFF 15
114 #define XLOG_REG_TYPE_LRHEADER 16
115 #define XLOG_REG_TYPE_UNMOUNT 17
116 #define XLOG_REG_TYPE_COMMIT 18
117 #define XLOG_REG_TYPE_TRANSHDR 19
118 #define XLOG_REG_TYPE_MAX 19
120 #define XLOG_VEC_SET_TYPE(vecp, t) ((vecp)->i_type = (t))
122 typedef struct xfs_log_iovec {
123 xfs_caddr_t i_addr; /* beginning address of region */
124 int i_len; /* length in bytes of region */
125 uint i_type; /* type of region */
128 typedef void* xfs_log_ticket_t;
131 * Structure used to pass callback function and the function's argument
132 * to the log manager.
134 typedef struct xfs_log_callback {
135 struct xfs_log_callback *cb_next;
136 void (*cb_func)(void *, int);
138 } xfs_log_callback_t;
142 /* Log manager interfaces */
144 xfs_lsn_t xfs_log_done(struct xfs_mount *mp,
145 xfs_log_ticket_t ticket,
148 int _xfs_log_force(struct xfs_mount *mp,
152 #define xfs_log_force(mp, lsn, flags) \
153 _xfs_log_force(mp, lsn, flags, NULL);
154 int xfs_log_mount(struct xfs_mount *mp,
155 struct xfs_buftarg *log_target,
156 xfs_daddr_t start_block,
158 int xfs_log_mount_finish(struct xfs_mount *mp, int);
159 void xfs_log_move_tail(struct xfs_mount *mp,
161 int xfs_log_notify(struct xfs_mount *mp,
163 xfs_log_callback_t *callback_entry);
164 int xfs_log_release_iclog(struct xfs_mount *mp,
166 int xfs_log_reserve(struct xfs_mount *mp,
169 xfs_log_ticket_t *ticket,
173 int xfs_log_write(struct xfs_mount *mp,
174 xfs_log_iovec_t region[],
176 xfs_log_ticket_t ticket,
177 xfs_lsn_t *start_lsn);
178 int xfs_log_unmount(struct xfs_mount *mp);
179 int xfs_log_unmount_write(struct xfs_mount *mp);
180 void xfs_log_unmount_dealloc(struct xfs_mount *mp);
181 int xfs_log_force_umount(struct xfs_mount *mp, int logerror);
182 int xfs_log_need_covered(struct xfs_mount *mp);
184 void xlog_iodone(struct xfs_buf *);
189 extern int xlog_debug; /* set to 1 to enable real log */
192 #endif /* __XFS_LOG_H__ */