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18#ifndef __XFS_LOG_H__
19#define __XFS_LOG_H__
20
21struct xfs_log_vec {
22 struct xfs_log_vec *lv_next;
23 int lv_niovecs;
24 struct xfs_log_iovec *lv_iovecp;
25 struct xfs_log_item *lv_item;
26 char *lv_buf;
27 int lv_bytes;
28 int lv_buf_len;
29 int lv_size;
30};
31
32#define XFS_LOG_VEC_ORDERED (-1)
33
34static inline void *
35xlog_prepare_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec **vecp,
36 uint type)
37{
38 struct xfs_log_iovec *vec = *vecp;
39
40 if (vec) {
41 ASSERT(vec - lv->lv_iovecp < lv->lv_niovecs);
42 vec++;
43 } else {
44 vec = &lv->lv_iovecp[0];
45 }
46
47 vec->i_type = type;
48 vec->i_addr = lv->lv_buf + lv->lv_buf_len;
49
50 ASSERT(IS_ALIGNED((unsigned long)vec->i_addr, sizeof(uint64_t)));
51
52 *vecp = vec;
53 return vec->i_addr;
54}
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64
65
66static inline void
67xlog_finish_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec *vec, int len)
68{
69 lv->lv_buf_len += round_up(len, sizeof(uint64_t));
70 lv->lv_bytes += len;
71 vec->i_len = len;
72}
73
74static inline void *
75xlog_copy_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec **vecp,
76 uint type, void *data, int len)
77{
78 void *buf;
79
80 buf = xlog_prepare_iovec(lv, vecp, type);
81 memcpy(buf, data, len);
82 xlog_finish_iovec(lv, *vecp, len);
83 return buf;
84}
85
86
87
88
89
90typedef struct xfs_log_callback {
91 struct xfs_log_callback *cb_next;
92 void (*cb_func)(void *, int);
93 void *cb_arg;
94} xfs_log_callback_t;
95
96
97
98
99
100static inline xfs_lsn_t _lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2)
101{
102 if (CYCLE_LSN(lsn1) != CYCLE_LSN(lsn2))
103 return (CYCLE_LSN(lsn1)<CYCLE_LSN(lsn2))? -999 : 999;
104
105 if (BLOCK_LSN(lsn1) != BLOCK_LSN(lsn2))
106 return (BLOCK_LSN(lsn1)<BLOCK_LSN(lsn2))? -999 : 999;
107
108 return 0;
109}
110
111#define XFS_LSN_CMP(x,y) _lsn_cmp(x,y)
112
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117
118#define XFS_LOG_SYNC 0x1
119
120
121struct xfs_mount;
122struct xlog_in_core;
123struct xlog_ticket;
124struct xfs_log_item;
125struct xfs_item_ops;
126struct xfs_trans;
127
128xfs_lsn_t xfs_log_done(struct xfs_mount *mp,
129 struct xlog_ticket *ticket,
130 struct xlog_in_core **iclog,
131 bool regrant);
132int _xfs_log_force(struct xfs_mount *mp,
133 uint flags,
134 int *log_forced);
135void xfs_log_force(struct xfs_mount *mp,
136 uint flags);
137int _xfs_log_force_lsn(struct xfs_mount *mp,
138 xfs_lsn_t lsn,
139 uint flags,
140 int *log_forced);
141void xfs_log_force_lsn(struct xfs_mount *mp,
142 xfs_lsn_t lsn,
143 uint flags);
144int xfs_log_mount(struct xfs_mount *mp,
145 struct xfs_buftarg *log_target,
146 xfs_daddr_t start_block,
147 int num_bblocks);
148int xfs_log_mount_finish(struct xfs_mount *mp);
149int xfs_log_mount_cancel(struct xfs_mount *);
150xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp);
151xfs_lsn_t xlog_assign_tail_lsn_locked(struct xfs_mount *mp);
152void xfs_log_space_wake(struct xfs_mount *mp);
153int xfs_log_notify(struct xfs_mount *mp,
154 struct xlog_in_core *iclog,
155 struct xfs_log_callback *callback_entry);
156int xfs_log_release_iclog(struct xfs_mount *mp,
157 struct xlog_in_core *iclog);
158int xfs_log_reserve(struct xfs_mount *mp,
159 int length,
160 int count,
161 struct xlog_ticket **ticket,
162 uint8_t clientid,
163 bool permanent);
164int xfs_log_regrant(struct xfs_mount *mp, struct xlog_ticket *tic);
165void xfs_log_unmount(struct xfs_mount *mp);
166int xfs_log_force_umount(struct xfs_mount *mp, int logerror);
167
168struct xlog_ticket *xfs_log_ticket_get(struct xlog_ticket *ticket);
169void xfs_log_ticket_put(struct xlog_ticket *ticket);
170
171void xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp,
172 xfs_lsn_t *commit_lsn, bool regrant);
173bool xfs_log_item_in_current_chkpt(struct xfs_log_item *lip);
174
175void xfs_log_work_queue(struct xfs_mount *mp);
176void xfs_log_quiesce(struct xfs_mount *mp);
177bool xfs_log_check_lsn(struct xfs_mount *, xfs_lsn_t);
178
179#endif
180