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 /* kernel only transaction subsystem defines */ 22 23 struct xfs_buf; 24 struct xfs_buftarg; 25 struct xfs_efd_log_item; 26 struct xfs_efi_log_item; 27 struct xfs_inode; 28 struct xfs_item_ops; 29 struct xfs_log_iovec; 30 struct xfs_log_item_desc; 31 struct xfs_mount; 32 struct xfs_trans; 33 struct xfs_trans_res; 34 struct xfs_dquot_acct; 35 struct xfs_busy_extent; 36 37 typedef struct xfs_log_item { 38 struct list_head li_ail; /* AIL pointers */ 39 xfs_lsn_t li_lsn; /* last on-disk lsn */ 40 struct xfs_log_item_desc *li_desc; /* ptr to current desc*/ 41 struct xfs_mount *li_mountp; /* ptr to fs mount */ 42 struct xfs_ail *li_ailp; /* ptr to AIL */ 43 uint li_type; /* item type */ 44 uint li_flags; /* misc flags */ 45 struct xfs_log_item *li_bio_list; /* buffer item list */ 46 void (*li_cb)(struct xfs_buf *, 47 struct xfs_log_item *); 48 /* buffer item iodone */ 49 /* callback func */ 50 const struct xfs_item_ops *li_ops; /* function list */ 51 52 /* delayed logging */ 53 struct list_head li_cil; /* CIL pointers */ 54 struct xfs_log_vec *li_lv; /* active log vector */ 55 xfs_lsn_t li_seq; /* CIL commit seq */ 56 } xfs_log_item_t; 57 58 #define XFS_LI_IN_AIL 0x1 59 #define XFS_LI_ABORTED 0x2 60 61 #define XFS_LI_FLAGS \ 62 { XFS_LI_IN_AIL, "IN_AIL" }, \ 63 { XFS_LI_ABORTED, "ABORTED" } 64 65 struct xfs_item_ops { 66 void (*iop_size)(xfs_log_item_t *, int *, int *); 67 void (*iop_format)(xfs_log_item_t *, struct xfs_log_vec *); 68 void (*iop_pin)(xfs_log_item_t *); 69 void (*iop_unpin)(xfs_log_item_t *, int remove); 70 uint (*iop_push)(struct xfs_log_item *, struct list_head *); 71 void (*iop_unlock)(xfs_log_item_t *); 72 xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t); 73 void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t); 74 }; 75 76 void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item, 77 int type, const struct xfs_item_ops *ops); 78 79 /* 80 * Return values for the iop_push() routines. 81 */ 82 #define XFS_ITEM_SUCCESS 0 83 #define XFS_ITEM_PINNED 1 84 #define XFS_ITEM_LOCKED 2 85 #define XFS_ITEM_FLUSHING 3 86 87 88 /* 89 * This is the structure maintained for every active transaction. 90 */ 91 typedef struct xfs_trans { 92 unsigned int t_magic; /* magic number */ 93 unsigned int t_log_res; /* amt of log space resvd */ 94 unsigned int t_log_count; /* count for perm log res */ 95 unsigned int t_blk_res; /* # of blocks resvd */ 96 unsigned int t_blk_res_used; /* # of resvd blocks used */ 97 unsigned int t_rtx_res; /* # of rt extents resvd */ 98 unsigned int t_rtx_res_used; /* # of resvd rt extents used */ 99 struct xlog_ticket *t_ticket; /* log mgr ticket */ 100 xfs_lsn_t t_lsn; /* log seq num of start of 101 * transaction. */ 102 xfs_lsn_t t_commit_lsn; /* log seq num of end of 103 * transaction. */ 104 struct xfs_mount *t_mountp; /* ptr to fs mount struct */ 105 struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */ 106 unsigned int t_flags; /* misc flags */ 107 int64_t t_icount_delta; /* superblock icount change */ 108 int64_t t_ifree_delta; /* superblock ifree change */ 109 int64_t t_fdblocks_delta; /* superblock fdblocks chg */ 110 int64_t t_res_fdblocks_delta; /* on-disk only chg */ 111 int64_t t_frextents_delta;/* superblock freextents chg*/ 112 int64_t t_res_frextents_delta; /* on-disk only chg */ 113 #if defined(DEBUG) || defined(XFS_WARN) 114 int64_t t_ag_freeblks_delta; /* debugging counter */ 115 int64_t t_ag_flist_delta; /* debugging counter */ 116 int64_t t_ag_btree_delta; /* debugging counter */ 117 #endif 118 int64_t t_dblocks_delta;/* superblock dblocks change */ 119 int64_t t_agcount_delta;/* superblock agcount change */ 120 int64_t t_imaxpct_delta;/* superblock imaxpct change */ 121 int64_t t_rextsize_delta;/* superblock rextsize chg */ 122 int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */ 123 int64_t t_rblocks_delta;/* superblock rblocks change */ 124 int64_t t_rextents_delta;/* superblocks rextents chg */ 125 int64_t t_rextslog_delta;/* superblocks rextslog chg */ 126 struct list_head t_items; /* log item descriptors */ 127 struct list_head t_busy; /* list of busy extents */ 128 unsigned long t_pflags; /* saved process flags state */ 129 } xfs_trans_t; 130 131 /* 132 * XFS transaction mechanism exported interfaces that are 133 * actually macros. 134 */ 135 #define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC) 136 137 #if defined(DEBUG) || defined(XFS_WARN) 138 #define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d) 139 #define xfs_trans_agflist_delta(tp, d) ((tp)->t_ag_flist_delta += (int64_t)d) 140 #define xfs_trans_agbtree_delta(tp, d) ((tp)->t_ag_btree_delta += (int64_t)d) 141 #else 142 #define xfs_trans_agblocks_delta(tp, d) 143 #define xfs_trans_agflist_delta(tp, d) 144 #define xfs_trans_agbtree_delta(tp, d) 145 #endif 146 147 /* 148 * XFS transaction mechanism exported interfaces. 149 */ 150 int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp, 151 uint blocks, uint rtextents, uint flags, 152 struct xfs_trans **tpp); 153 void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t); 154 155 struct xfs_buf *xfs_trans_get_buf_map(struct xfs_trans *tp, 156 struct xfs_buftarg *target, 157 struct xfs_buf_map *map, int nmaps, 158 uint flags); 159 160 static inline struct xfs_buf * 161 xfs_trans_get_buf( 162 struct xfs_trans *tp, 163 struct xfs_buftarg *target, 164 xfs_daddr_t blkno, 165 int numblks, 166 uint flags) 167 { 168 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 169 return xfs_trans_get_buf_map(tp, target, &map, 1, flags); 170 } 171 172 int xfs_trans_read_buf_map(struct xfs_mount *mp, 173 struct xfs_trans *tp, 174 struct xfs_buftarg *target, 175 struct xfs_buf_map *map, int nmaps, 176 xfs_buf_flags_t flags, 177 struct xfs_buf **bpp, 178 const struct xfs_buf_ops *ops); 179 180 static inline int 181 xfs_trans_read_buf( 182 struct xfs_mount *mp, 183 struct xfs_trans *tp, 184 struct xfs_buftarg *target, 185 xfs_daddr_t blkno, 186 int numblks, 187 xfs_buf_flags_t flags, 188 struct xfs_buf **bpp, 189 const struct xfs_buf_ops *ops) 190 { 191 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 192 return xfs_trans_read_buf_map(mp, tp, target, &map, 1, 193 flags, bpp, ops); 194 } 195 196 struct xfs_buf *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int); 197 198 void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *); 199 void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *); 200 void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *); 201 void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *); 202 void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *); 203 void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *); 204 void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *); 205 void xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *); 206 void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint); 207 void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *); 208 void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int); 209 void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint); 210 void xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint); 211 void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); 212 struct xfs_efi_log_item *xfs_trans_get_efi(xfs_trans_t *, uint); 213 void xfs_trans_log_efi_extent(xfs_trans_t *, 214 struct xfs_efi_log_item *, 215 xfs_fsblock_t, 216 xfs_extlen_t); 217 struct xfs_efd_log_item *xfs_trans_get_efd(xfs_trans_t *, 218 struct xfs_efi_log_item *, 219 uint); 220 int xfs_trans_free_extent(struct xfs_trans *, 221 struct xfs_efd_log_item *, xfs_fsblock_t, 222 xfs_extlen_t); 223 int xfs_trans_commit(struct xfs_trans *); 224 int __xfs_trans_roll(struct xfs_trans **, struct xfs_inode *, int *); 225 int xfs_trans_roll(struct xfs_trans **, struct xfs_inode *); 226 void xfs_trans_cancel(xfs_trans_t *); 227 int xfs_trans_ail_init(struct xfs_mount *); 228 void xfs_trans_ail_destroy(struct xfs_mount *); 229 230 void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *, 231 enum xfs_blft); 232 void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp, 233 struct xfs_buf *src_bp); 234 235 extern kmem_zone_t *xfs_trans_zone; 236 extern kmem_zone_t *xfs_log_item_desc_zone; 237 238 #endif /* __XFS_TRANS_H__ */ 239