1 /* 2 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #ifndef __XFS_TRANS_H__ 19 #define __XFS_TRANS_H__ 20 21 struct xfs_log_item; 22 23 #include "xfs_trans_resv.h" 24 25 /* kernel only transaction subsystem defines */ 26 27 struct xfs_buf; 28 struct xfs_buftarg; 29 struct xfs_efd_log_item; 30 struct xfs_efi_log_item; 31 struct xfs_inode; 32 struct xfs_item_ops; 33 struct xfs_log_iovec; 34 struct xfs_log_item_desc; 35 struct xfs_mount; 36 struct xfs_trans; 37 struct xfs_trans_res; 38 struct xfs_dquot_acct; 39 struct xfs_busy_extent; 40 41 typedef struct xfs_log_item { 42 struct list_head li_ail; /* AIL pointers */ 43 xfs_lsn_t li_lsn; /* last on-disk lsn */ 44 struct xfs_log_item_desc *li_desc; /* ptr to current desc*/ 45 struct xfs_mount *li_mountp; /* ptr to fs mount */ 46 struct xfs_ail *li_ailp; /* ptr to AIL */ 47 uint li_type; /* item type */ 48 uint li_flags; /* misc flags */ 49 struct xfs_log_item *li_bio_list; /* buffer item list */ 50 void (*li_cb)(struct xfs_buf *, 51 struct xfs_log_item *); 52 /* buffer item iodone */ 53 /* callback func */ 54 const struct xfs_item_ops *li_ops; /* function list */ 55 56 /* delayed logging */ 57 struct list_head li_cil; /* CIL pointers */ 58 struct xfs_log_vec *li_lv; /* active log vector */ 59 xfs_lsn_t li_seq; /* CIL commit seq */ 60 } xfs_log_item_t; 61 62 #define XFS_LI_IN_AIL 0x1 63 #define XFS_LI_ABORTED 0x2 64 65 #define XFS_LI_FLAGS \ 66 { XFS_LI_IN_AIL, "IN_AIL" }, \ 67 { XFS_LI_ABORTED, "ABORTED" } 68 69 struct xfs_item_ops { 70 void (*iop_size)(xfs_log_item_t *, int *, int *); 71 void (*iop_format)(xfs_log_item_t *, struct xfs_log_iovec *); 72 void (*iop_pin)(xfs_log_item_t *); 73 void (*iop_unpin)(xfs_log_item_t *, int remove); 74 uint (*iop_push)(struct xfs_log_item *, struct list_head *); 75 void (*iop_unlock)(xfs_log_item_t *); 76 xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t); 77 void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t); 78 }; 79 80 /* 81 * Return values for the iop_push() routines. 82 */ 83 #define XFS_ITEM_SUCCESS 0 84 #define XFS_ITEM_PINNED 1 85 #define XFS_ITEM_LOCKED 2 86 #define XFS_ITEM_FLUSHING 3 87 88 /* 89 * This is the type of function which can be given to xfs_trans_callback() 90 * to be called upon the transaction's commit to disk. 91 */ 92 typedef void (*xfs_trans_callback_t)(struct xfs_trans *, void *); 93 94 /* 95 * This is the structure maintained for every active transaction. 96 */ 97 typedef struct xfs_trans { 98 unsigned int t_magic; /* magic number */ 99 xfs_log_callback_t t_logcb; /* log callback struct */ 100 unsigned int t_type; /* transaction type */ 101 unsigned int t_log_res; /* amt of log space resvd */ 102 unsigned int t_log_count; /* count for perm log res */ 103 unsigned int t_blk_res; /* # of blocks resvd */ 104 unsigned int t_blk_res_used; /* # of resvd blocks used */ 105 unsigned int t_rtx_res; /* # of rt extents resvd */ 106 unsigned int t_rtx_res_used; /* # of resvd rt extents used */ 107 struct xlog_ticket *t_ticket; /* log mgr ticket */ 108 xfs_lsn_t t_lsn; /* log seq num of start of 109 * transaction. */ 110 xfs_lsn_t t_commit_lsn; /* log seq num of end of 111 * transaction. */ 112 struct xfs_mount *t_mountp; /* ptr to fs mount struct */ 113 struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */ 114 unsigned int t_flags; /* misc flags */ 115 int64_t t_icount_delta; /* superblock icount change */ 116 int64_t t_ifree_delta; /* superblock ifree change */ 117 int64_t t_fdblocks_delta; /* superblock fdblocks chg */ 118 int64_t t_res_fdblocks_delta; /* on-disk only chg */ 119 int64_t t_frextents_delta;/* superblock freextents chg*/ 120 int64_t t_res_frextents_delta; /* on-disk only chg */ 121 #if defined(DEBUG) || defined(XFS_WARN) 122 int64_t t_ag_freeblks_delta; /* debugging counter */ 123 int64_t t_ag_flist_delta; /* debugging counter */ 124 int64_t t_ag_btree_delta; /* debugging counter */ 125 #endif 126 int64_t t_dblocks_delta;/* superblock dblocks change */ 127 int64_t t_agcount_delta;/* superblock agcount change */ 128 int64_t t_imaxpct_delta;/* superblock imaxpct change */ 129 int64_t t_rextsize_delta;/* superblock rextsize chg */ 130 int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */ 131 int64_t t_rblocks_delta;/* superblock rblocks change */ 132 int64_t t_rextents_delta;/* superblocks rextents chg */ 133 int64_t t_rextslog_delta;/* superblocks rextslog chg */ 134 struct list_head t_items; /* log item descriptors */ 135 xfs_trans_header_t t_header; /* header for in-log trans */ 136 struct list_head t_busy; /* list of busy extents */ 137 unsigned long t_pflags; /* saved process flags state */ 138 } xfs_trans_t; 139 140 /* 141 * XFS transaction mechanism exported interfaces that are 142 * actually macros. 143 */ 144 #define xfs_trans_get_log_res(tp) ((tp)->t_log_res) 145 #define xfs_trans_get_log_count(tp) ((tp)->t_log_count) 146 #define xfs_trans_get_block_res(tp) ((tp)->t_blk_res) 147 #define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC) 148 149 #if defined(DEBUG) || defined(XFS_WARN) 150 #define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d) 151 #define xfs_trans_agflist_delta(tp, d) ((tp)->t_ag_flist_delta += (int64_t)d) 152 #define xfs_trans_agbtree_delta(tp, d) ((tp)->t_ag_btree_delta += (int64_t)d) 153 #else 154 #define xfs_trans_agblocks_delta(tp, d) 155 #define xfs_trans_agflist_delta(tp, d) 156 #define xfs_trans_agbtree_delta(tp, d) 157 #endif 158 159 /* 160 * XFS transaction mechanism exported interfaces. 161 */ 162 xfs_trans_t *xfs_trans_alloc(struct xfs_mount *, uint); 163 xfs_trans_t *_xfs_trans_alloc(struct xfs_mount *, uint, xfs_km_flags_t); 164 xfs_trans_t *xfs_trans_dup(xfs_trans_t *); 165 int xfs_trans_reserve(struct xfs_trans *, struct xfs_trans_res *, 166 uint, uint); 167 void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t); 168 169 struct xfs_buf *xfs_trans_get_buf_map(struct xfs_trans *tp, 170 struct xfs_buftarg *target, 171 struct xfs_buf_map *map, int nmaps, 172 uint flags); 173 174 static inline struct xfs_buf * 175 xfs_trans_get_buf( 176 struct xfs_trans *tp, 177 struct xfs_buftarg *target, 178 xfs_daddr_t blkno, 179 int numblks, 180 uint flags) 181 { 182 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 183 return xfs_trans_get_buf_map(tp, target, &map, 1, flags); 184 } 185 186 int xfs_trans_read_buf_map(struct xfs_mount *mp, 187 struct xfs_trans *tp, 188 struct xfs_buftarg *target, 189 struct xfs_buf_map *map, int nmaps, 190 xfs_buf_flags_t flags, 191 struct xfs_buf **bpp, 192 const struct xfs_buf_ops *ops); 193 194 static inline int 195 xfs_trans_read_buf( 196 struct xfs_mount *mp, 197 struct xfs_trans *tp, 198 struct xfs_buftarg *target, 199 xfs_daddr_t blkno, 200 int numblks, 201 xfs_buf_flags_t flags, 202 struct xfs_buf **bpp, 203 const struct xfs_buf_ops *ops) 204 { 205 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 206 return xfs_trans_read_buf_map(mp, tp, target, &map, 1, 207 flags, bpp, ops); 208 } 209 210 struct xfs_buf *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int); 211 212 void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *); 213 void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *); 214 void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *); 215 void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *); 216 void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *); 217 void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *); 218 void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *); 219 void xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *); 220 void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint); 221 void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *); 222 void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int); 223 void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint); 224 void xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint); 225 void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); 226 struct xfs_efi_log_item *xfs_trans_get_efi(xfs_trans_t *, uint); 227 void xfs_efi_release(struct xfs_efi_log_item *, uint); 228 void xfs_trans_log_efi_extent(xfs_trans_t *, 229 struct xfs_efi_log_item *, 230 xfs_fsblock_t, 231 xfs_extlen_t); 232 struct xfs_efd_log_item *xfs_trans_get_efd(xfs_trans_t *, 233 struct xfs_efi_log_item *, 234 uint); 235 void xfs_trans_log_efd_extent(xfs_trans_t *, 236 struct xfs_efd_log_item *, 237 xfs_fsblock_t, 238 xfs_extlen_t); 239 int xfs_trans_commit(xfs_trans_t *, uint flags); 240 void xfs_trans_cancel(xfs_trans_t *, int); 241 int xfs_trans_ail_init(struct xfs_mount *); 242 void xfs_trans_ail_destroy(struct xfs_mount *); 243 244 extern kmem_zone_t *xfs_trans_zone; 245 extern kmem_zone_t *xfs_log_item_desc_zone; 246 247 #endif /* __XFS_TRANS_H__ */ 248