1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2000,2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #ifndef __XFS_LOG_RECOVER_H__ 7 #define __XFS_LOG_RECOVER_H__ 8 9 /* 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. 12 */ 13 struct xlog_recover_item; 14 15 /* Sorting hat for log items as they're read in. */ 16 enum xlog_recover_reorder { 17 XLOG_REORDER_BUFFER_LIST, 18 XLOG_REORDER_ITEM_LIST, 19 XLOG_REORDER_INODE_BUFFER_LIST, 20 XLOG_REORDER_CANCEL_LIST, 21 }; 22 23 struct xlog_recover_item_ops { 24 uint16_t item_type; /* XFS_LI_* type code. */ 25 26 /* 27 * Help sort recovered log items into the order required to replay them 28 * correctly. Log item types that always use XLOG_REORDER_ITEM_LIST do 29 * not have to supply a function here. See the comment preceding 30 * xlog_recover_reorder_trans for more details about what the return 31 * values mean. 32 */ 33 enum xlog_recover_reorder (*reorder)(struct xlog_recover_item *item); 34 35 /* Start readahead for pass2, if provided. */ 36 void (*ra_pass2)(struct xlog *log, struct xlog_recover_item *item); 37 38 /* Do whatever work we need to do for pass1, if provided. */ 39 int (*commit_pass1)(struct xlog *log, struct xlog_recover_item *item); 40 41 /* 42 * This function should do whatever work is needed for pass2 of log 43 * recovery, if provided. 44 * 45 * If the recovered item is an intent item, this function should parse 46 * the recovered item to construct an in-core log intent item and 47 * insert it into the AIL. The in-core log intent item should have 1 48 * refcount so that the item is freed either (a) when we commit the 49 * recovered log item for the intent-done item; (b) replay the work and 50 * log a new intent-done item; or (c) recovery fails and we have to 51 * abort. 52 * 53 * If the recovered item is an intent-done item, this function should 54 * parse the recovered item to find the id of the corresponding intent 55 * log item. Next, it should find the in-core log intent item in the 56 * AIL and release it. 57 */ 58 int (*commit_pass2)(struct xlog *log, struct list_head *buffer_list, 59 struct xlog_recover_item *item, xfs_lsn_t lsn); 60 }; 61 62 extern const struct xlog_recover_item_ops xlog_icreate_item_ops; 63 extern const struct xlog_recover_item_ops xlog_buf_item_ops; 64 extern const struct xlog_recover_item_ops xlog_inode_item_ops; 65 extern const struct xlog_recover_item_ops xlog_dquot_item_ops; 66 extern const struct xlog_recover_item_ops xlog_quotaoff_item_ops; 67 extern const struct xlog_recover_item_ops xlog_bui_item_ops; 68 extern const struct xlog_recover_item_ops xlog_bud_item_ops; 69 extern const struct xlog_recover_item_ops xlog_efi_item_ops; 70 extern const struct xlog_recover_item_ops xlog_efd_item_ops; 71 extern const struct xlog_recover_item_ops xlog_rui_item_ops; 72 extern const struct xlog_recover_item_ops xlog_rud_item_ops; 73 extern const struct xlog_recover_item_ops xlog_cui_item_ops; 74 extern const struct xlog_recover_item_ops xlog_cud_item_ops; 75 extern const struct xlog_recover_item_ops xlog_attri_item_ops; 76 extern const struct xlog_recover_item_ops xlog_attrd_item_ops; 77 78 /* 79 * Macros, structures, prototypes for internal log manager use. 80 */ 81 82 #define XLOG_RHASH_BITS 4 83 #define XLOG_RHASH_SIZE 16 84 #define XLOG_RHASH_SHIFT 2 85 #define XLOG_RHASH(tid) \ 86 ((((uint32_t)tid)>>XLOG_RHASH_SHIFT) & (XLOG_RHASH_SIZE-1)) 87 88 #define XLOG_MAX_REGIONS_IN_ITEM (XFS_MAX_BLOCKSIZE / XFS_BLF_CHUNK / 2 + 1) 89 90 91 /* 92 * item headers are in ri_buf[0]. Additional buffers follow. 93 */ 94 struct xlog_recover_item { 95 struct list_head ri_list; 96 int ri_cnt; /* count of regions found */ 97 int ri_total; /* total regions */ 98 struct xfs_log_iovec *ri_buf; /* ptr to regions buffer */ 99 const struct xlog_recover_item_ops *ri_ops; 100 }; 101 102 struct xlog_recover { 103 struct hlist_node r_list; 104 xlog_tid_t r_log_tid; /* log's transaction id */ 105 xfs_trans_header_t r_theader; /* trans header for partial */ 106 int r_state; /* not needed */ 107 xfs_lsn_t r_lsn; /* xact lsn */ 108 struct list_head r_itemq; /* q for items */ 109 }; 110 111 #define ITEM_TYPE(i) (*(unsigned short *)(i)->ri_buf[0].i_addr) 112 113 #define XLOG_RECOVER_CRCPASS 0 114 #define XLOG_RECOVER_PASS1 1 115 #define XLOG_RECOVER_PASS2 2 116 117 void xlog_buf_readahead(struct xlog *log, xfs_daddr_t blkno, uint len, 118 const struct xfs_buf_ops *ops); 119 bool xlog_is_buffer_cancelled(struct xlog *log, xfs_daddr_t blkno, uint len); 120 121 int xlog_recover_iget(struct xfs_mount *mp, xfs_ino_t ino, 122 struct xfs_inode **ipp); 123 void xlog_recover_release_intent(struct xlog *log, unsigned short intent_type, 124 uint64_t intent_id); 125 int xlog_alloc_buf_cancel_table(struct xlog *log); 126 void xlog_free_buf_cancel_table(struct xlog *log); 127 128 #ifdef DEBUG 129 void xlog_check_buf_cancel_table(struct xlog *log); 130 #else 131 #define xlog_check_buf_cancel_table(log) do { } while (0) 132 #endif 133 134 /* 135 * Transform a regular reservation into one suitable for recovery of a log 136 * intent item. 137 * 138 * Intent recovery only runs a single step of the transaction chain and defers 139 * the rest to a separate transaction. Therefore, we reduce logcount to 1 here 140 * to avoid livelocks if the log grant space is nearly exhausted due to the 141 * recovered intent pinning the tail. Keep the same logflags to avoid tripping 142 * asserts elsewhere. Struct copies abound below. 143 */ 144 static inline struct xfs_trans_res xlog_recover_resv(const struct xfs_trans_res * r)145 xlog_recover_resv(const struct xfs_trans_res *r) 146 { 147 struct xfs_trans_res ret = { 148 .tr_logres = r->tr_logres, 149 .tr_logcount = 1, 150 .tr_logflags = r->tr_logflags, 151 }; 152 153 return ret; 154 } 155 156 void xlog_recover_intent_item(struct xlog *log, struct xfs_log_item *lip, 157 xfs_lsn_t lsn, unsigned int dfp_type); 158 void xlog_recover_transfer_intent(struct xfs_trans *tp, 159 struct xfs_defer_pending *dfp); 160 161 #endif /* __XFS_LOG_RECOVER_H__ */ 162