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_buf_len; /* size of formatted buffer */
28 int lv_size; /* size of allocated lv */
31 #define XFS_LOG_VEC_ORDERED (-1)
34 xlog_prepare_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec **vecp,
37 struct xfs_log_iovec *vec = *vecp;
40 ASSERT(vec - lv->lv_iovecp < lv->lv_niovecs);
43 vec = &lv->lv_iovecp[0];
47 vec->i_addr = lv->lv_buf + lv->lv_buf_len;
49 ASSERT(IS_ALIGNED((unsigned long)vec->i_addr, sizeof(uint64_t)));
56 xlog_finish_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec *vec, int len)
59 * We need to make sure the next buffer is naturally aligned for the
60 * biggest basic data type we put into it. We already accounted for
61 * this when sizing the buffer.
63 lv->lv_buf_len += round_up(len, sizeof(uint64_t));
68 xlog_copy_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec **vecp,
69 uint type, void *data, int len)
73 buf = xlog_prepare_iovec(lv, vecp, type);
74 memcpy(buf, data, len);
75 xlog_finish_iovec(lv, *vecp, len);
80 * Structure used to pass callback function and the function's argument
83 typedef struct xfs_log_callback {
84 struct xfs_log_callback *cb_next;
85 void (*cb_func)(void *, int);
90 * By comparing each component, we don't have to worry about extra
91 * endian issues in treating two 32 bit numbers as one 64 bit number
93 static inline xfs_lsn_t _lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2)
95 if (CYCLE_LSN(lsn1) != CYCLE_LSN(lsn2))
96 return (CYCLE_LSN(lsn1)<CYCLE_LSN(lsn2))? -999 : 999;
98 if (BLOCK_LSN(lsn1) != BLOCK_LSN(lsn2))
99 return (BLOCK_LSN(lsn1)<BLOCK_LSN(lsn2))? -999 : 999;
104 #define XFS_LSN_CMP(x,y) _lsn_cmp(x,y)
107 * Macros, structures, prototypes for interface to the log manager.
111 * Flags to xfs_log_done()
113 #define XFS_LOG_REL_PERM_RESERV 0x1
116 * Flags to xfs_log_force()
118 * XFS_LOG_SYNC: Synchronous force in-core log to disk
120 #define XFS_LOG_SYNC 0x1
122 /* Log manager interfaces */
129 struct xfs_log_callback;
131 xfs_lsn_t xfs_log_done(struct xfs_mount *mp,
132 struct xlog_ticket *ticket,
133 struct xlog_in_core **iclog,
135 int _xfs_log_force(struct xfs_mount *mp,
138 void xfs_log_force(struct xfs_mount *mp,
140 int _xfs_log_force_lsn(struct xfs_mount *mp,
144 void xfs_log_force_lsn(struct xfs_mount *mp,
147 int xfs_log_mount(struct xfs_mount *mp,
148 struct xfs_buftarg *log_target,
149 xfs_daddr_t start_block,
151 int xfs_log_mount_finish(struct xfs_mount *mp);
152 xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp);
153 xfs_lsn_t xlog_assign_tail_lsn_locked(struct xfs_mount *mp);
154 void xfs_log_space_wake(struct xfs_mount *mp);
155 int xfs_log_notify(struct xfs_mount *mp,
156 struct xlog_in_core *iclog,
157 struct xfs_log_callback *callback_entry);
158 int xfs_log_release_iclog(struct xfs_mount *mp,
159 struct xlog_in_core *iclog);
160 int xfs_log_reserve(struct xfs_mount *mp,
163 struct xlog_ticket **ticket,
167 int xfs_log_regrant(struct xfs_mount *mp, struct xlog_ticket *tic);
168 int xfs_log_unmount_write(struct xfs_mount *mp);
169 void xfs_log_unmount(struct xfs_mount *mp);
170 int xfs_log_force_umount(struct xfs_mount *mp, int logerror);
171 int xfs_log_need_covered(struct xfs_mount *mp);
173 void xlog_iodone(struct xfs_buf *);
175 struct xlog_ticket *xfs_log_ticket_get(struct xlog_ticket *ticket);
176 void xfs_log_ticket_put(struct xlog_ticket *ticket);
178 void xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp,
179 xfs_lsn_t *commit_lsn, int flags);
180 bool xfs_log_item_in_current_chkpt(struct xfs_log_item *lip);
182 void xfs_log_work_queue(struct xfs_mount *mp);
183 void xfs_log_worker(struct work_struct *work);
184 void xfs_log_quiesce(struct xfs_mount *mp);
186 #endif /* __XFS_LOG_H__ */