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_rmapbt_buf_ops; 42 extern const struct xfs_buf_ops xfs_attr3_leaf_buf_ops; 43 extern const struct xfs_buf_ops xfs_attr3_rmt_buf_ops; 44 extern const struct xfs_buf_ops xfs_bmbt_buf_ops; 45 extern const struct xfs_buf_ops xfs_da3_node_buf_ops; 46 extern const struct xfs_buf_ops xfs_dquot_buf_ops; 47 extern const struct xfs_buf_ops xfs_symlink_buf_ops; 48 extern const struct xfs_buf_ops xfs_agi_buf_ops; 49 extern const struct xfs_buf_ops xfs_inobt_buf_ops; 50 extern const struct xfs_buf_ops xfs_inode_buf_ops; 51 extern const struct xfs_buf_ops xfs_inode_buf_ra_ops; 52 extern const struct xfs_buf_ops xfs_dquot_buf_ops; 53 extern const struct xfs_buf_ops xfs_dquot_buf_ra_ops; 54 extern const struct xfs_buf_ops xfs_sb_buf_ops; 55 extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops; 56 extern const struct xfs_buf_ops xfs_symlink_buf_ops; 57 extern const struct xfs_buf_ops xfs_rtbuf_ops; 58 59 /* 60 * This structure is used to track log items associated with 61 * a transaction. It points to the log item and keeps some 62 * flags to track the state of the log item. It also tracks 63 * the amount of space needed to log the item it describes 64 * once we get to commit processing (see xfs_trans_commit()). 65 */ 66 struct xfs_log_item_desc { 67 struct xfs_log_item *lid_item; 68 struct list_head lid_trans; 69 unsigned char lid_flags; 70 }; 71 72 #define XFS_LID_DIRTY 0x1 73 74 /* log size calculation functions */ 75 int xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes); 76 int xfs_log_calc_minimum_size(struct xfs_mount *); 77 78 79 /* 80 * Values for t_flags. 81 */ 82 #define XFS_TRANS_DIRTY 0x01 /* something needs to be logged */ 83 #define XFS_TRANS_SB_DIRTY 0x02 /* superblock is modified */ 84 #define XFS_TRANS_PERM_LOG_RES 0x04 /* xact took a permanent log res */ 85 #define XFS_TRANS_SYNC 0x08 /* make commit synchronous */ 86 #define XFS_TRANS_DQ_DIRTY 0x10 /* at least one dquot in trx dirty */ 87 #define XFS_TRANS_RESERVE 0x20 /* OK to use reserved data blocks */ 88 #define XFS_TRANS_NO_WRITECOUNT 0x40 /* do not elevate SB writecount */ 89 #define XFS_TRANS_NOFS 0x80 /* pass KM_NOFS to kmem_alloc */ 90 91 /* 92 * Field values for xfs_trans_mod_sb. 93 */ 94 #define XFS_TRANS_SB_ICOUNT 0x00000001 95 #define XFS_TRANS_SB_IFREE 0x00000002 96 #define XFS_TRANS_SB_FDBLOCKS 0x00000004 97 #define XFS_TRANS_SB_RES_FDBLOCKS 0x00000008 98 #define XFS_TRANS_SB_FREXTENTS 0x00000010 99 #define XFS_TRANS_SB_RES_FREXTENTS 0x00000020 100 #define XFS_TRANS_SB_DBLOCKS 0x00000040 101 #define XFS_TRANS_SB_AGCOUNT 0x00000080 102 #define XFS_TRANS_SB_IMAXPCT 0x00000100 103 #define XFS_TRANS_SB_REXTSIZE 0x00000200 104 #define XFS_TRANS_SB_RBMBLOCKS 0x00000400 105 #define XFS_TRANS_SB_RBLOCKS 0x00000800 106 #define XFS_TRANS_SB_REXTENTS 0x00001000 107 #define XFS_TRANS_SB_REXTSLOG 0x00002000 108 109 /* 110 * Here we centralize the specification of XFS meta-data buffer reference count 111 * values. This determines how hard the buffer cache tries to hold onto the 112 * buffer. 113 */ 114 #define XFS_AGF_REF 4 115 #define XFS_AGI_REF 4 116 #define XFS_AGFL_REF 3 117 #define XFS_INO_BTREE_REF 3 118 #define XFS_ALLOC_BTREE_REF 2 119 #define XFS_BMAP_BTREE_REF 2 120 #define XFS_RMAP_BTREE_REF 2 121 #define XFS_DIR_BTREE_REF 2 122 #define XFS_INO_REF 2 123 #define XFS_ATTR_BTREE_REF 1 124 #define XFS_DQUOT_REF 1 125 126 /* 127 * Flags for xfs_trans_ichgtime(). 128 */ 129 #define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */ 130 #define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */ 131 #define XFS_ICHGTIME_CREATE 0x4 /* inode create timestamp */ 132 133 134 /* 135 * Symlink decoding/encoding functions 136 */ 137 int xfs_symlink_blocks(struct xfs_mount *mp, int pathlen); 138 int xfs_symlink_hdr_set(struct xfs_mount *mp, xfs_ino_t ino, uint32_t offset, 139 uint32_t size, struct xfs_buf *bp); 140 bool xfs_symlink_hdr_ok(xfs_ino_t ino, uint32_t offset, 141 uint32_t size, struct xfs_buf *bp); 142 void xfs_symlink_local_to_remote(struct xfs_trans *tp, struct xfs_buf *bp, 143 struct xfs_inode *ip, struct xfs_ifork *ifp); 144 145 #endif /* __XFS_SHARED_H__ */ 146