1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
6 #ifndef __XFS_LOG_RECOVER_H__
7 #define __XFS_LOG_RECOVER_H__
10 * Each log item type (XFS_LI_*) gets its own xlog_recover_item_ops to
11 * define how recovery should work for that type of log item.
13 struct xlog_recover_item;
14 struct xfs_defer_op_type;
16 /* Sorting hat for log items as they're read in. */
17 enum xlog_recover_reorder {
18 XLOG_REORDER_BUFFER_LIST,
19 XLOG_REORDER_ITEM_LIST,
20 XLOG_REORDER_INODE_BUFFER_LIST,
21 XLOG_REORDER_CANCEL_LIST,
24 struct xlog_recover_item_ops {
25 uint16_t item_type; /* XFS_LI_* type code. */
28 * Help sort recovered log items into the order required to replay them
29 * correctly. Log item types that always use XLOG_REORDER_ITEM_LIST do
30 * not have to supply a function here. See the comment preceding
31 * xlog_recover_reorder_trans for more details about what the return
34 enum xlog_recover_reorder (*reorder)(struct xlog_recover_item *item);
36 /* Start readahead for pass2, if provided. */
37 void (*ra_pass2)(struct xlog *log, struct xlog_recover_item *item);
39 /* Do whatever work we need to do for pass1, if provided. */
40 int (*commit_pass1)(struct xlog *log, struct xlog_recover_item *item);
43 * This function should do whatever work is needed for pass2 of log
44 * recovery, if provided.
46 * If the recovered item is an intent item, this function should parse
47 * the recovered item to construct an in-core log intent item and
48 * insert it into the AIL. The in-core log intent item should have 1
49 * refcount so that the item is freed either (a) when we commit the
50 * recovered log item for the intent-done item; (b) replay the work and
51 * log a new intent-done item; or (c) recovery fails and we have to
54 * If the recovered item is an intent-done item, this function should
55 * parse the recovered item to find the id of the corresponding intent
56 * log item. Next, it should find the in-core log intent item in the
59 int (*commit_pass2)(struct xlog *log, struct list_head *buffer_list,
60 struct xlog_recover_item *item, xfs_lsn_t lsn);
63 extern const struct xlog_recover_item_ops xlog_icreate_item_ops;
64 extern const struct xlog_recover_item_ops xlog_buf_item_ops;
65 extern const struct xlog_recover_item_ops xlog_inode_item_ops;
66 extern const struct xlog_recover_item_ops xlog_dquot_item_ops;
67 extern const struct xlog_recover_item_ops xlog_quotaoff_item_ops;
68 extern const struct xlog_recover_item_ops xlog_bui_item_ops;
69 extern const struct xlog_recover_item_ops xlog_bud_item_ops;
70 extern const struct xlog_recover_item_ops xlog_efi_item_ops;
71 extern const struct xlog_recover_item_ops xlog_efd_item_ops;
72 extern const struct xlog_recover_item_ops xlog_rui_item_ops;
73 extern const struct xlog_recover_item_ops xlog_rud_item_ops;
74 extern const struct xlog_recover_item_ops xlog_cui_item_ops;
75 extern const struct xlog_recover_item_ops xlog_cud_item_ops;
76 extern const struct xlog_recover_item_ops xlog_attri_item_ops;
77 extern const struct xlog_recover_item_ops xlog_attrd_item_ops;
80 * Macros, structures, prototypes for internal log manager use.
83 #define XLOG_RHASH_BITS 4
84 #define XLOG_RHASH_SIZE 16
85 #define XLOG_RHASH_SHIFT 2
86 #define XLOG_RHASH(tid) \
87 ((((uint32_t)tid)>>XLOG_RHASH_SHIFT) & (XLOG_RHASH_SIZE-1))
89 #define XLOG_MAX_REGIONS_IN_ITEM (XFS_MAX_BLOCKSIZE / XFS_BLF_CHUNK / 2 + 1)
93 * item headers are in ri_buf[0]. Additional buffers follow.
95 struct xlog_recover_item {
96 struct list_head ri_list;
97 int ri_cnt; /* count of regions found */
98 int ri_total; /* total regions */
99 struct xfs_log_iovec *ri_buf; /* ptr to regions buffer */
100 const struct xlog_recover_item_ops *ri_ops;
103 struct xlog_recover {
104 struct hlist_node r_list;
105 xlog_tid_t r_log_tid; /* log's transaction id */
106 xfs_trans_header_t r_theader; /* trans header for partial */
107 int r_state; /* not needed */
108 xfs_lsn_t r_lsn; /* xact lsn */
109 struct list_head r_itemq; /* q for items */
112 #define ITEM_TYPE(i) (*(unsigned short *)(i)->ri_buf[0].i_addr)
114 #define XLOG_RECOVER_CRCPASS 0
115 #define XLOG_RECOVER_PASS1 1
116 #define XLOG_RECOVER_PASS2 2
118 void xlog_buf_readahead(struct xlog *log, xfs_daddr_t blkno, uint len,
119 const struct xfs_buf_ops *ops);
120 bool xlog_is_buffer_cancelled(struct xlog *log, xfs_daddr_t blkno, uint len);
122 int xlog_recover_iget(struct xfs_mount *mp, xfs_ino_t ino,
123 struct xfs_inode **ipp);
124 void xlog_recover_release_intent(struct xlog *log, unsigned short intent_type,
126 int xlog_alloc_buf_cancel_table(struct xlog *log);
127 void xlog_free_buf_cancel_table(struct xlog *log);
130 void xlog_check_buf_cancel_table(struct xlog *log);
132 #define xlog_check_buf_cancel_table(log) do { } while (0)
136 * Transform a regular reservation into one suitable for recovery of a log
139 * Intent recovery only runs a single step of the transaction chain and defers
140 * the rest to a separate transaction. Therefore, we reduce logcount to 1 here
141 * to avoid livelocks if the log grant space is nearly exhausted due to the
142 * recovered intent pinning the tail. Keep the same logflags to avoid tripping
143 * asserts elsewhere. Struct copies abound below.
145 static inline struct xfs_trans_res
146 xlog_recover_resv(const struct xfs_trans_res *r)
148 struct xfs_trans_res ret = {
149 .tr_logres = r->tr_logres,
151 .tr_logflags = r->tr_logflags,
157 struct xfs_defer_pending;
159 void xlog_recover_intent_item(struct xlog *log, struct xfs_log_item *lip,
160 xfs_lsn_t lsn, const struct xfs_defer_op_type *ops);
161 int xlog_recover_finish_intent(struct xfs_trans *tp,
162 struct xfs_defer_pending *dfp);
164 #endif /* __XFS_LOG_RECOVER_H__ */