1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
12 struct xfs_log_vec *lv_next; /* next lv in build list */
13 int lv_niovecs; /* number of iovecs in lv */
14 struct xfs_log_iovec *lv_iovecp; /* iovec array */
15 struct xfs_log_item *lv_item; /* owner */
16 char *lv_buf; /* formatted buffer */
17 int lv_bytes; /* accounted space in buffer */
18 int lv_buf_len; /* aligned size of buffer */
19 int lv_size; /* size of allocated lv */
22 #define XFS_LOG_VEC_ORDERED (-1)
25 xlog_prepare_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec **vecp,
28 struct xfs_log_iovec *vec = *vecp;
31 ASSERT(vec - lv->lv_iovecp < lv->lv_niovecs);
34 vec = &lv->lv_iovecp[0];
38 vec->i_addr = lv->lv_buf + lv->lv_buf_len;
40 ASSERT(IS_ALIGNED((unsigned long)vec->i_addr, sizeof(uint64_t)));
47 * We need to make sure the next buffer is naturally aligned for the biggest
48 * basic data type we put into it. We already accounted for this padding when
51 * However, this padding does not get written into the log, and hence we have to
52 * track the space used by the log vectors separately to prevent log space hangs
53 * due to inaccurate accounting (i.e. a leak) of the used log space through the
57 xlog_finish_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec *vec, int len)
59 lv->lv_buf_len += round_up(len, sizeof(uint64_t));
65 xlog_copy_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec **vecp,
66 uint type, void *data, int len)
70 buf = xlog_prepare_iovec(lv, vecp, type);
71 memcpy(buf, data, len);
72 xlog_finish_iovec(lv, *vecp, len);
77 * By comparing each component, we don't have to worry about extra
78 * endian issues in treating two 32 bit numbers as one 64 bit number
80 static inline xfs_lsn_t _lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2)
82 if (CYCLE_LSN(lsn1) != CYCLE_LSN(lsn2))
83 return (CYCLE_LSN(lsn1)<CYCLE_LSN(lsn2))? -999 : 999;
85 if (BLOCK_LSN(lsn1) != BLOCK_LSN(lsn2))
86 return (BLOCK_LSN(lsn1)<BLOCK_LSN(lsn2))? -999 : 999;
91 #define XFS_LSN_CMP(x,y) _lsn_cmp(x,y)
94 * Flags to xfs_log_force()
96 * XFS_LOG_SYNC: Synchronous force in-core log to disk
98 #define XFS_LOG_SYNC 0x1
100 /* Log manager interfaces */
109 int xfs_log_force(struct xfs_mount *mp, uint flags);
110 int xfs_log_force_seq(struct xfs_mount *mp, xfs_csn_t seq, uint flags,
112 int xfs_log_mount(struct xfs_mount *mp,
113 struct xfs_buftarg *log_target,
114 xfs_daddr_t start_block,
116 int xfs_log_mount_finish(struct xfs_mount *mp);
117 void xfs_log_mount_cancel(struct xfs_mount *);
118 xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp);
119 xfs_lsn_t xlog_assign_tail_lsn_locked(struct xfs_mount *mp);
120 void xfs_log_space_wake(struct xfs_mount *mp);
121 int xfs_log_reserve(struct xfs_mount *mp,
124 struct xlog_ticket **ticket,
127 int xfs_log_regrant(struct xfs_mount *mp, struct xlog_ticket *tic);
128 void xfs_log_unmount(struct xfs_mount *mp);
129 bool xfs_log_writable(struct xfs_mount *mp);
131 struct xlog_ticket *xfs_log_ticket_get(struct xlog_ticket *ticket);
132 void xfs_log_ticket_put(struct xlog_ticket *ticket);
134 void xlog_cil_process_committed(struct list_head *list);
135 bool xfs_log_item_in_current_chkpt(struct xfs_log_item *lip);
137 void xfs_log_work_queue(struct xfs_mount *mp);
138 int xfs_log_quiesce(struct xfs_mount *mp);
139 void xfs_log_clean(struct xfs_mount *mp);
140 bool xfs_log_check_lsn(struct xfs_mount *, xfs_lsn_t);
142 xfs_lsn_t xlog_grant_push_threshold(struct xlog *log, int need_bytes);
143 bool xlog_force_shutdown(struct xlog *log, int shutdown_flags);
145 void xlog_use_incompat_feat(struct xlog *log);
146 void xlog_drop_incompat_feat(struct xlog *log);
148 #endif /* __XFS_LOG_H__ */