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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - fs/xfs/xfs_log.h
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__ */