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0b61f8a4 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
7b718769 NS |
3 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
4 | * All Rights Reserved. | |
1da177e4 LT |
5 | */ |
6 | #ifndef __XFS_LOG_H__ | |
7 | #define __XFS_LOG_H__ | |
8 | ||
89ae379d CH |
9 | struct xfs_cil_ctx; |
10 | ||
fc06c6d0 | 11 | struct xfs_log_vec { |
16924853 | 12 | struct list_head lv_list; /* CIL lv chain ptrs */ |
4eb56069 | 13 | uint32_t lv_order_id; /* chain ordering info */ |
fc06c6d0 DC |
14 | int lv_niovecs; /* number of iovecs in lv */ |
15 | struct xfs_log_iovec *lv_iovecp; /* iovec array */ | |
16 | struct xfs_log_item *lv_item; /* owner */ | |
17 | char *lv_buf; /* formatted buffer */ | |
110dc24a DC |
18 | int lv_bytes; /* accounted space in buffer */ |
19 | int lv_buf_len; /* aligned size of buffer */ | |
7492c5b4 | 20 | int lv_size; /* size of allocated lv */ |
fc06c6d0 DC |
21 | }; |
22 | ||
23 | #define XFS_LOG_VEC_ORDERED (-1) | |
24 | ||
b2c28035 DC |
25 | /* |
26 | * Calculate the log iovec length for a given user buffer length. Intended to be | |
27 | * used by ->iop_size implementations when sizing buffers of arbitrary | |
28 | * alignments. | |
29 | */ | |
30 | static inline int | |
31 | xlog_calc_iovec_len(int len) | |
32 | { | |
33 | return roundup(len, sizeof(uint32_t)); | |
34 | } | |
35 | ||
8d547cf9 DC |
36 | void *xlog_prepare_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec **vecp, |
37 | uint type); | |
1234351c | 38 | |
bde7cff6 | 39 | static inline void |
b2c28035 DC |
40 | xlog_finish_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec *vec, |
41 | int data_len) | |
bde7cff6 | 42 | { |
8d547cf9 | 43 | struct xlog_op_header *oph = vec->i_addr; |
b2c28035 | 44 | int len; |
8d547cf9 | 45 | |
b2c28035 DC |
46 | /* |
47 | * Always round up the length to the correct alignment so callers don't | |
48 | * need to know anything about this log vec layout requirement. This | |
49 | * means we have to zero the area the data to be written does not cover. | |
50 | * This is complicated by fact the payload region is offset into the | |
51 | * logvec region by the opheader that tracks the payload. | |
52 | */ | |
53 | len = xlog_calc_iovec_len(data_len); | |
54 | if (len - data_len != 0) { | |
55 | char *buf = vec->i_addr + sizeof(struct xlog_op_header); | |
56 | ||
57 | memset(buf + data_len, 0, len - data_len); | |
58 | } | |
59 | ||
60 | /* | |
61 | * The opheader tracks aligned payload length, whilst the logvec tracks | |
62 | * the overall region length. | |
63 | */ | |
8d547cf9 DC |
64 | oph->oh_len = cpu_to_be32(len); |
65 | ||
66 | len += sizeof(struct xlog_op_header); | |
3c352bef | 67 | lv->lv_buf_len += len; |
110dc24a | 68 | lv->lv_bytes += len; |
bde7cff6 | 69 | vec->i_len = len; |
b2c28035 DC |
70 | |
71 | /* Catch buffer overruns */ | |
72 | ASSERT((void *)lv->lv_buf + lv->lv_bytes <= (void *)lv + lv->lv_size); | |
bde7cff6 CH |
73 | } |
74 | ||
b2c28035 DC |
75 | /* |
76 | * Copy the amount of data requested by the caller into a new log iovec. | |
77 | */ | |
bde7cff6 CH |
78 | static inline void * |
79 | xlog_copy_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec **vecp, | |
80 | uint type, void *data, int len) | |
81 | { | |
82 | void *buf; | |
83 | ||
84 | buf = xlog_prepare_iovec(lv, vecp, type); | |
85 | memcpy(buf, data, len); | |
86 | xlog_finish_iovec(lv, *vecp, len); | |
87 | return buf; | |
88 | } | |
89 | ||
4183e4f2 DW |
90 | static inline void * |
91 | xlog_copy_from_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec **vecp, | |
92 | const struct xfs_log_iovec *src) | |
93 | { | |
94 | return xlog_copy_iovec(lv, vecp, src->i_type, src->i_addr, src->i_len); | |
95 | } | |
96 | ||
1da177e4 | 97 | /* |
c41564b5 | 98 | * By comparing each component, we don't have to worry about extra |
1da177e4 LT |
99 | * endian issues in treating two 32 bit numbers as one 64 bit number |
100 | */ | |
a1365647 | 101 | static inline xfs_lsn_t _lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2) |
1da177e4 LT |
102 | { |
103 | if (CYCLE_LSN(lsn1) != CYCLE_LSN(lsn2)) | |
104 | return (CYCLE_LSN(lsn1)<CYCLE_LSN(lsn2))? -999 : 999; | |
105 | ||
106 | if (BLOCK_LSN(lsn1) != BLOCK_LSN(lsn2)) | |
107 | return (BLOCK_LSN(lsn1)<BLOCK_LSN(lsn2))? -999 : 999; | |
108 | ||
109 | return 0; | |
110 | } | |
111 | ||
112 | #define XFS_LSN_CMP(x,y) _lsn_cmp(x,y) | |
113 | ||
1da177e4 LT |
114 | /* |
115 | * Flags to xfs_log_force() | |
116 | * | |
117 | * XFS_LOG_SYNC: Synchronous force in-core log to disk | |
1da177e4 LT |
118 | */ |
119 | #define XFS_LOG_SYNC 0x1 | |
1da177e4 | 120 | |
1da177e4 LT |
121 | /* Log manager interfaces */ |
122 | struct xfs_mount; | |
35a8a72f | 123 | struct xlog_in_core; |
cc09c0dc | 124 | struct xlog_ticket; |
43f5efc5 DC |
125 | struct xfs_log_item; |
126 | struct xfs_item_ops; | |
955833cf | 127 | struct xfs_trans; |
0020a190 | 128 | struct xlog; |
35a8a72f | 129 | |
60e5bb78 | 130 | int xfs_log_force(struct xfs_mount *mp, uint flags); |
5f9b4b0d | 131 | int xfs_log_force_seq(struct xfs_mount *mp, xfs_csn_t seq, uint flags, |
656de4ff | 132 | int *log_forced); |
1da177e4 LT |
133 | int xfs_log_mount(struct xfs_mount *mp, |
134 | struct xfs_buftarg *log_target, | |
135 | xfs_daddr_t start_block, | |
136 | int num_bblocks); | |
4249023a | 137 | int xfs_log_mount_finish(struct xfs_mount *mp); |
a7a9250e | 138 | void xfs_log_mount_cancel(struct xfs_mount *); |
09a423a3 | 139 | xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp); |
1c304625 | 140 | xfs_lsn_t xlog_assign_tail_lsn_locked(struct xfs_mount *mp); |
c7610dce DC |
141 | void xfs_log_space_wake(struct xfs_mount *mp); |
142 | int xfs_log_reserve(struct xfs_mount *mp, int length, int count, | |
143 | struct xlog_ticket **ticket, bool permanent); | |
144 | int xfs_log_regrant(struct xfs_mount *mp, struct xlog_ticket *tic); | |
145 | void xfs_log_unmount(struct xfs_mount *mp); | |
50d25484 | 146 | bool xfs_log_writable(struct xfs_mount *mp); |
1da177e4 | 147 | |
71e330b5 | 148 | struct xlog_ticket *xfs_log_ticket_get(struct xlog_ticket *ticket); |
cc09c0dc DC |
149 | void xfs_log_ticket_put(struct xlog_ticket *ticket); |
150 | ||
12e6a0f4 | 151 | void xlog_cil_process_committed(struct list_head *list); |
ccf7c23f | 152 | bool xfs_log_item_in_current_chkpt(struct xfs_log_item *lip); |
71e330b5 | 153 | |
f661f1e0 | 154 | void xfs_log_work_queue(struct xfs_mount *mp); |
303591a0 | 155 | int xfs_log_quiesce(struct xfs_mount *mp); |
9e54ee0f | 156 | void xfs_log_clean(struct xfs_mount *mp); |
a45086e2 | 157 | bool xfs_log_check_lsn(struct xfs_mount *, xfs_lsn_t); |
f661f1e0 | 158 | |
2eb7550d | 159 | bool xlog_force_shutdown(struct xlog *log, uint32_t shutdown_flags); |
ed1575da | 160 | |
f3f36c89 | 161 | int xfs_attr_use_log_assist(struct xfs_mount *mp); |
2b73a2c8 | 162 | |
1da177e4 | 163 | #endif /* __XFS_LOG_H__ */ |