1 /* 2 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 3 * Copyright (c) 2013 Red Hat, Inc. 4 * All Rights Reserved. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it would be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 18 */ 19 #ifndef __XFS_SHARED_H__ 20 #define __XFS_SHARED_H__ 21 22 /* 23 * Definitions shared between kernel and userspace that don't fit into any other 24 * header file that is shared with userspace. 25 */ 26 struct xfs_ifork; 27 struct xfs_buf; 28 struct xfs_buf_ops; 29 struct xfs_mount; 30 struct xfs_trans; 31 struct xfs_inode; 32 33 /* 34 * Buffer verifier operations are widely used, including userspace tools 35 */ 36 extern const struct xfs_buf_ops xfs_agf_buf_ops; 37 extern const struct xfs_buf_ops xfs_agi_buf_ops; 38 extern const struct xfs_buf_ops xfs_agf_buf_ops; 39 extern const struct xfs_buf_ops xfs_agfl_buf_ops; 40 extern const struct xfs_buf_ops xfs_allocbt_buf_ops; 41 extern const struct xfs_buf_ops xfs_attr3_leaf_buf_ops; 42 extern const struct xfs_buf_ops xfs_attr3_rmt_buf_ops; 43 extern const struct xfs_buf_ops xfs_bmbt_buf_ops; 44 extern const struct xfs_buf_ops xfs_da3_node_buf_ops; 45 extern const struct xfs_buf_ops xfs_dquot_buf_ops; 46 extern const struct xfs_buf_ops xfs_symlink_buf_ops; 47 extern const struct xfs_buf_ops xfs_agi_buf_ops; 48 extern const struct xfs_buf_ops xfs_inobt_buf_ops; 49 extern const struct xfs_buf_ops xfs_inode_buf_ops; 50 extern const struct xfs_buf_ops xfs_inode_buf_ra_ops; 51 extern const struct xfs_buf_ops xfs_dquot_buf_ops; 52 extern const struct xfs_buf_ops xfs_sb_buf_ops; 53 extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops; 54 extern const struct xfs_buf_ops xfs_symlink_buf_ops; 55 56 /* 57 * Transaction types. Used to distinguish types of buffers. These never reach 58 * the log. 59 */ 60 #define XFS_TRANS_SETATTR_NOT_SIZE 1 61 #define XFS_TRANS_SETATTR_SIZE 2 62 #define XFS_TRANS_INACTIVE 3 63 #define XFS_TRANS_CREATE 4 64 #define XFS_TRANS_CREATE_TRUNC 5 65 #define XFS_TRANS_TRUNCATE_FILE 6 66 #define XFS_TRANS_REMOVE 7 67 #define XFS_TRANS_LINK 8 68 #define XFS_TRANS_RENAME 9 69 #define XFS_TRANS_MKDIR 10 70 #define XFS_TRANS_RMDIR 11 71 #define XFS_TRANS_SYMLINK 12 72 #define XFS_TRANS_SET_DMATTRS 13 73 #define XFS_TRANS_GROWFS 14 74 #define XFS_TRANS_STRAT_WRITE 15 75 #define XFS_TRANS_DIOSTRAT 16 76 /* 17 was XFS_TRANS_WRITE_SYNC */ 77 #define XFS_TRANS_WRITEID 18 78 #define XFS_TRANS_ADDAFORK 19 79 #define XFS_TRANS_ATTRINVAL 20 80 #define XFS_TRANS_ATRUNCATE 21 81 #define XFS_TRANS_ATTR_SET 22 82 #define XFS_TRANS_ATTR_RM 23 83 #define XFS_TRANS_ATTR_FLAG 24 84 #define XFS_TRANS_CLEAR_AGI_BUCKET 25 85 #define XFS_TRANS_SB_CHANGE 26 86 /* 87 * Dummy entries since we use the transaction type to index into the 88 * trans_type[] in xlog_recover_print_trans_head() 89 */ 90 #define XFS_TRANS_DUMMY1 27 91 #define XFS_TRANS_DUMMY2 28 92 #define XFS_TRANS_QM_QUOTAOFF 29 93 #define XFS_TRANS_QM_DQALLOC 30 94 #define XFS_TRANS_QM_SETQLIM 31 95 #define XFS_TRANS_QM_DQCLUSTER 32 96 #define XFS_TRANS_QM_QINOCREATE 33 97 #define XFS_TRANS_QM_QUOTAOFF_END 34 98 #define XFS_TRANS_FSYNC_TS 35 99 #define XFS_TRANS_GROWFSRT_ALLOC 36 100 #define XFS_TRANS_GROWFSRT_ZERO 37 101 #define XFS_TRANS_GROWFSRT_FREE 38 102 #define XFS_TRANS_SWAPEXT 39 103 #define XFS_TRANS_CHECKPOINT 40 104 #define XFS_TRANS_ICREATE 41 105 #define XFS_TRANS_CREATE_TMPFILE 42 106 #define XFS_TRANS_TYPE_MAX 43 107 /* new transaction types need to be reflected in xfs_logprint(8) */ 108 109 #define XFS_TRANS_TYPES \ 110 { XFS_TRANS_SETATTR_NOT_SIZE, "SETATTR_NOT_SIZE" }, \ 111 { XFS_TRANS_SETATTR_SIZE, "SETATTR_SIZE" }, \ 112 { XFS_TRANS_INACTIVE, "INACTIVE" }, \ 113 { XFS_TRANS_CREATE, "CREATE" }, \ 114 { XFS_TRANS_CREATE_TRUNC, "CREATE_TRUNC" }, \ 115 { XFS_TRANS_TRUNCATE_FILE, "TRUNCATE_FILE" }, \ 116 { XFS_TRANS_REMOVE, "REMOVE" }, \ 117 { XFS_TRANS_LINK, "LINK" }, \ 118 { XFS_TRANS_RENAME, "RENAME" }, \ 119 { XFS_TRANS_MKDIR, "MKDIR" }, \ 120 { XFS_TRANS_RMDIR, "RMDIR" }, \ 121 { XFS_TRANS_SYMLINK, "SYMLINK" }, \ 122 { XFS_TRANS_SET_DMATTRS, "SET_DMATTRS" }, \ 123 { XFS_TRANS_GROWFS, "GROWFS" }, \ 124 { XFS_TRANS_STRAT_WRITE, "STRAT_WRITE" }, \ 125 { XFS_TRANS_DIOSTRAT, "DIOSTRAT" }, \ 126 { XFS_TRANS_WRITEID, "WRITEID" }, \ 127 { XFS_TRANS_ADDAFORK, "ADDAFORK" }, \ 128 { XFS_TRANS_ATTRINVAL, "ATTRINVAL" }, \ 129 { XFS_TRANS_ATRUNCATE, "ATRUNCATE" }, \ 130 { XFS_TRANS_ATTR_SET, "ATTR_SET" }, \ 131 { XFS_TRANS_ATTR_RM, "ATTR_RM" }, \ 132 { XFS_TRANS_ATTR_FLAG, "ATTR_FLAG" }, \ 133 { XFS_TRANS_CLEAR_AGI_BUCKET, "CLEAR_AGI_BUCKET" }, \ 134 { XFS_TRANS_SB_CHANGE, "SBCHANGE" }, \ 135 { XFS_TRANS_DUMMY1, "DUMMY1" }, \ 136 { XFS_TRANS_DUMMY2, "DUMMY2" }, \ 137 { XFS_TRANS_QM_QUOTAOFF, "QM_QUOTAOFF" }, \ 138 { XFS_TRANS_QM_DQALLOC, "QM_DQALLOC" }, \ 139 { XFS_TRANS_QM_SETQLIM, "QM_SETQLIM" }, \ 140 { XFS_TRANS_QM_DQCLUSTER, "QM_DQCLUSTER" }, \ 141 { XFS_TRANS_QM_QINOCREATE, "QM_QINOCREATE" }, \ 142 { XFS_TRANS_QM_QUOTAOFF_END, "QM_QOFF_END" }, \ 143 { XFS_TRANS_FSYNC_TS, "FSYNC_TS" }, \ 144 { XFS_TRANS_GROWFSRT_ALLOC, "GROWFSRT_ALLOC" }, \ 145 { XFS_TRANS_GROWFSRT_ZERO, "GROWFSRT_ZERO" }, \ 146 { XFS_TRANS_GROWFSRT_FREE, "GROWFSRT_FREE" }, \ 147 { XFS_TRANS_SWAPEXT, "SWAPEXT" }, \ 148 { XFS_TRANS_CHECKPOINT, "CHECKPOINT" }, \ 149 { XFS_TRANS_ICREATE, "ICREATE" }, \ 150 { XFS_TRANS_CREATE_TMPFILE, "CREATE_TMPFILE" }, \ 151 { XLOG_UNMOUNT_REC_TYPE, "UNMOUNT" } 152 153 /* 154 * This structure is used to track log items associated with 155 * a transaction. It points to the log item and keeps some 156 * flags to track the state of the log item. It also tracks 157 * the amount of space needed to log the item it describes 158 * once we get to commit processing (see xfs_trans_commit()). 159 */ 160 struct xfs_log_item_desc { 161 struct xfs_log_item *lid_item; 162 struct list_head lid_trans; 163 unsigned char lid_flags; 164 }; 165 166 #define XFS_LID_DIRTY 0x1 167 168 /* log size calculation functions */ 169 int xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes); 170 int xfs_log_calc_minimum_size(struct xfs_mount *); 171 172 173 /* 174 * Values for t_flags. 175 */ 176 #define XFS_TRANS_DIRTY 0x01 /* something needs to be logged */ 177 #define XFS_TRANS_SB_DIRTY 0x02 /* superblock is modified */ 178 #define XFS_TRANS_PERM_LOG_RES 0x04 /* xact took a permanent log res */ 179 #define XFS_TRANS_SYNC 0x08 /* make commit synchronous */ 180 #define XFS_TRANS_DQ_DIRTY 0x10 /* at least one dquot in trx dirty */ 181 #define XFS_TRANS_RESERVE 0x20 /* OK to use reserved data blocks */ 182 #define XFS_TRANS_FREEZE_PROT 0x40 /* Transaction has elevated writer 183 count in superblock */ 184 /* 185 * Field values for xfs_trans_mod_sb. 186 */ 187 #define XFS_TRANS_SB_ICOUNT 0x00000001 188 #define XFS_TRANS_SB_IFREE 0x00000002 189 #define XFS_TRANS_SB_FDBLOCKS 0x00000004 190 #define XFS_TRANS_SB_RES_FDBLOCKS 0x00000008 191 #define XFS_TRANS_SB_FREXTENTS 0x00000010 192 #define XFS_TRANS_SB_RES_FREXTENTS 0x00000020 193 #define XFS_TRANS_SB_DBLOCKS 0x00000040 194 #define XFS_TRANS_SB_AGCOUNT 0x00000080 195 #define XFS_TRANS_SB_IMAXPCT 0x00000100 196 #define XFS_TRANS_SB_REXTSIZE 0x00000200 197 #define XFS_TRANS_SB_RBMBLOCKS 0x00000400 198 #define XFS_TRANS_SB_RBLOCKS 0x00000800 199 #define XFS_TRANS_SB_REXTENTS 0x00001000 200 #define XFS_TRANS_SB_REXTSLOG 0x00002000 201 202 /* 203 * Here we centralize the specification of XFS meta-data buffer reference count 204 * values. This determines how hard the buffer cache tries to hold onto the 205 * buffer. 206 */ 207 #define XFS_AGF_REF 4 208 #define XFS_AGI_REF 4 209 #define XFS_AGFL_REF 3 210 #define XFS_INO_BTREE_REF 3 211 #define XFS_ALLOC_BTREE_REF 2 212 #define XFS_BMAP_BTREE_REF 2 213 #define XFS_DIR_BTREE_REF 2 214 #define XFS_INO_REF 2 215 #define XFS_ATTR_BTREE_REF 1 216 #define XFS_DQUOT_REF 1 217 218 /* 219 * Flags for xfs_trans_ichgtime(). 220 */ 221 #define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */ 222 #define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */ 223 #define XFS_ICHGTIME_CREATE 0x4 /* inode create timestamp */ 224 225 226 /* 227 * Symlink decoding/encoding functions 228 */ 229 int xfs_symlink_blocks(struct xfs_mount *mp, int pathlen); 230 int xfs_symlink_hdr_set(struct xfs_mount *mp, xfs_ino_t ino, uint32_t offset, 231 uint32_t size, struct xfs_buf *bp); 232 bool xfs_symlink_hdr_ok(xfs_ino_t ino, uint32_t offset, 233 uint32_t size, struct xfs_buf *bp); 234 void xfs_symlink_local_to_remote(struct xfs_trans *tp, struct xfs_buf *bp, 235 struct xfs_inode *ip, struct xfs_ifork *ifp); 236 237 #endif /* __XFS_SHARED_H__ */ 238