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
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_bytes
; /* accounted space in buffer */
28 int lv_buf_len
; /* aligned size of buffer */
29 int lv_size
; /* size of allocated lv */
32 #define XFS_LOG_VEC_ORDERED (-1)
35 xlog_prepare_iovec(struct xfs_log_vec
*lv
, struct xfs_log_iovec
**vecp
,
38 struct xfs_log_iovec
*vec
= *vecp
;
41 ASSERT(vec
- lv
->lv_iovecp
< lv
->lv_niovecs
);
44 vec
= &lv
->lv_iovecp
[0];
48 vec
->i_addr
= lv
->lv_buf
+ lv
->lv_buf_len
;
50 ASSERT(IS_ALIGNED((unsigned long)vec
->i_addr
, sizeof(uint64_t)));
57 * We need to make sure the next buffer is naturally aligned for the biggest
58 * basic data type we put into it. We already accounted for this padding when
61 * However, this padding does not get written into the log, and hence we have to
62 * track the space used by the log vectors separately to prevent log space hangs
63 * due to inaccurate accounting (i.e. a leak) of the used log space through the
67 xlog_finish_iovec(struct xfs_log_vec
*lv
, struct xfs_log_iovec
*vec
, int len
)
69 lv
->lv_buf_len
+= round_up(len
, sizeof(uint64_t));
75 xlog_copy_iovec(struct xfs_log_vec
*lv
, struct xfs_log_iovec
**vecp
,
76 uint type
, void *data
, int len
)
80 buf
= xlog_prepare_iovec(lv
, vecp
, type
);
81 memcpy(buf
, data
, len
);
82 xlog_finish_iovec(lv
, *vecp
, len
);
87 * Structure used to pass callback function and the function's argument
90 typedef struct xfs_log_callback
{
91 struct xfs_log_callback
*cb_next
;
92 void (*cb_func
)(void *, int);
97 * By comparing each component, we don't have to worry about extra
98 * endian issues in treating two 32 bit numbers as one 64 bit number
100 static inline xfs_lsn_t
_lsn_cmp(xfs_lsn_t lsn1
, xfs_lsn_t lsn2
)
102 if (CYCLE_LSN(lsn1
) != CYCLE_LSN(lsn2
))
103 return (CYCLE_LSN(lsn1
)<CYCLE_LSN(lsn2
))? -999 : 999;
105 if (BLOCK_LSN(lsn1
) != BLOCK_LSN(lsn2
))
106 return (BLOCK_LSN(lsn1
)<BLOCK_LSN(lsn2
))? -999 : 999;
111 #define XFS_LSN_CMP(x,y) _lsn_cmp(x,y)
114 * Flags to xfs_log_force()
116 * XFS_LOG_SYNC: Synchronous force in-core log to disk
118 #define XFS_LOG_SYNC 0x1
120 /* Log manager interfaces */
128 xfs_lsn_t
xfs_log_done(struct xfs_mount
*mp
,
129 struct xlog_ticket
*ticket
,
130 struct xlog_in_core
**iclog
,
132 int _xfs_log_force(struct xfs_mount
*mp
,
135 void xfs_log_force(struct xfs_mount
*mp
,
137 int _xfs_log_force_lsn(struct xfs_mount
*mp
,
141 void xfs_log_force_lsn(struct xfs_mount
*mp
,
144 int xfs_log_mount(struct xfs_mount
*mp
,
145 struct xfs_buftarg
*log_target
,
146 xfs_daddr_t start_block
,
148 int xfs_log_mount_finish(struct xfs_mount
*mp
);
149 int xfs_log_mount_cancel(struct xfs_mount
*);
150 xfs_lsn_t
xlog_assign_tail_lsn(struct xfs_mount
*mp
);
151 xfs_lsn_t
xlog_assign_tail_lsn_locked(struct xfs_mount
*mp
);
152 void xfs_log_space_wake(struct xfs_mount
*mp
);
153 int xfs_log_notify(struct xfs_mount
*mp
,
154 struct xlog_in_core
*iclog
,
155 struct xfs_log_callback
*callback_entry
);
156 int xfs_log_release_iclog(struct xfs_mount
*mp
,
157 struct xlog_in_core
*iclog
);
158 int xfs_log_reserve(struct xfs_mount
*mp
,
161 struct xlog_ticket
**ticket
,
164 int xfs_log_regrant(struct xfs_mount
*mp
, struct xlog_ticket
*tic
);
165 void xfs_log_unmount(struct xfs_mount
*mp
);
166 int xfs_log_force_umount(struct xfs_mount
*mp
, int logerror
);
168 struct xlog_ticket
*xfs_log_ticket_get(struct xlog_ticket
*ticket
);
169 void xfs_log_ticket_put(struct xlog_ticket
*ticket
);
171 void xfs_log_commit_cil(struct xfs_mount
*mp
, struct xfs_trans
*tp
,
172 xfs_lsn_t
*commit_lsn
, bool regrant
);
173 bool xfs_log_item_in_current_chkpt(struct xfs_log_item
*lip
);
175 void xfs_log_work_queue(struct xfs_mount
*mp
);
176 void xfs_log_quiesce(struct xfs_mount
*mp
);
177 bool xfs_log_check_lsn(struct xfs_mount
*, xfs_lsn_t
);
179 #endif /* __XFS_LOG_H__ */