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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}
55
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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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116
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;
127struct xfs_log_callback;
128
129xfs_lsn_t xfs_log_done(struct xfs_mount *mp,
130 struct xlog_ticket *ticket,
131 struct xlog_in_core **iclog,
132 bool regrant);
133int _xfs_log_force(struct xfs_mount *mp,
134 uint flags,
135 int *log_forced);
136void xfs_log_force(struct xfs_mount *mp,
137 uint flags);
138int _xfs_log_force_lsn(struct xfs_mount *mp,
139 xfs_lsn_t lsn,
140 uint flags,
141 int *log_forced);
142void xfs_log_force_lsn(struct xfs_mount *mp,
143 xfs_lsn_t lsn,
144 uint flags);
145int xfs_log_mount(struct xfs_mount *mp,
146 struct xfs_buftarg *log_target,
147 xfs_daddr_t start_block,
148 int num_bblocks);
149int xfs_log_mount_finish(struct xfs_mount *mp);
150int xfs_log_mount_cancel(struct xfs_mount *);
151xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp);
152xfs_lsn_t xlog_assign_tail_lsn_locked(struct xfs_mount *mp);
153void xfs_log_space_wake(struct xfs_mount *mp);
154int xfs_log_notify(struct xfs_mount *mp,
155 struct xlog_in_core *iclog,
156 struct xfs_log_callback *callback_entry);
157int xfs_log_release_iclog(struct xfs_mount *mp,
158 struct xlog_in_core *iclog);
159int xfs_log_reserve(struct xfs_mount *mp,
160 int length,
161 int count,
162 struct xlog_ticket **ticket,
163 __uint8_t clientid,
164 bool permanent,
165 uint t_type);
166int xfs_log_regrant(struct xfs_mount *mp, struct xlog_ticket *tic);
167int xfs_log_unmount_write(struct xfs_mount *mp);
168void xfs_log_unmount(struct xfs_mount *mp);
169int xfs_log_force_umount(struct xfs_mount *mp, int logerror);
170int xfs_log_need_covered(struct xfs_mount *mp);
171
172void xlog_iodone(struct xfs_buf *);
173
174struct xlog_ticket *xfs_log_ticket_get(struct xlog_ticket *ticket);
175void xfs_log_ticket_put(struct xlog_ticket *ticket);
176
177void xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp,
178 xfs_lsn_t *commit_lsn, bool regrant);
179bool xfs_log_item_in_current_chkpt(struct xfs_log_item *lip);
180
181void xfs_log_work_queue(struct xfs_mount *mp);
182void xfs_log_worker(struct work_struct *work);
183void xfs_log_quiesce(struct xfs_mount *mp);
184bool xfs_log_check_lsn(struct xfs_mount *, xfs_lsn_t);
185
186#endif
187