| /* |
| * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| * Copyright (c) 2013 Red Hat, Inc. |
| * All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it would be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| #ifndef __XFS_SHARED_H__ |
| #define __XFS_SHARED_H__ |
| |
| /* |
| * Definitions shared between kernel and userspace that don't fit into any other |
| * header file that is shared with userspace. |
| */ |
| struct xfs_ifork; |
| struct xfs_buf; |
| struct xfs_buf_ops; |
| struct xfs_mount; |
| struct xfs_trans; |
| struct xfs_inode; |
| |
| /* |
| * Buffer verifier operations are widely used, including userspace tools |
| */ |
| extern const struct xfs_buf_ops xfs_agf_buf_ops; |
| extern const struct xfs_buf_ops xfs_agi_buf_ops; |
| extern const struct xfs_buf_ops xfs_agf_buf_ops; |
| extern const struct xfs_buf_ops xfs_agfl_buf_ops; |
| extern const struct xfs_buf_ops xfs_allocbt_buf_ops; |
| extern const struct xfs_buf_ops xfs_rmapbt_buf_ops; |
| extern const struct xfs_buf_ops xfs_refcountbt_buf_ops; |
| extern const struct xfs_buf_ops xfs_attr3_leaf_buf_ops; |
| extern const struct xfs_buf_ops xfs_attr3_rmt_buf_ops; |
| extern const struct xfs_buf_ops xfs_bmbt_buf_ops; |
| extern const struct xfs_buf_ops xfs_da3_node_buf_ops; |
| extern const struct xfs_buf_ops xfs_dquot_buf_ops; |
| extern const struct xfs_buf_ops xfs_symlink_buf_ops; |
| extern const struct xfs_buf_ops xfs_agi_buf_ops; |
| extern const struct xfs_buf_ops xfs_inobt_buf_ops; |
| extern const struct xfs_buf_ops xfs_inode_buf_ops; |
| extern const struct xfs_buf_ops xfs_inode_buf_ra_ops; |
| extern const struct xfs_buf_ops xfs_dquot_buf_ops; |
| extern const struct xfs_buf_ops xfs_dquot_buf_ra_ops; |
| extern const struct xfs_buf_ops xfs_sb_buf_ops; |
| extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops; |
| extern const struct xfs_buf_ops xfs_symlink_buf_ops; |
| extern const struct xfs_buf_ops xfs_rtbuf_ops; |
| |
| /* |
| * This structure is used to track log items associated with |
| * a transaction. It points to the log item and keeps some |
| * flags to track the state of the log item. It also tracks |
| * the amount of space needed to log the item it describes |
| * once we get to commit processing (see xfs_trans_commit()). |
| */ |
| struct xfs_log_item_desc { |
| struct xfs_log_item *lid_item; |
| struct list_head lid_trans; |
| unsigned char lid_flags; |
| }; |
| |
| #define XFS_LID_DIRTY 0x1 |
| |
| /* log size calculation functions */ |
| int xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes); |
| int xfs_log_calc_minimum_size(struct xfs_mount *); |
| |
| |
| /* |
| * Values for t_flags. |
| */ |
| #define XFS_TRANS_DIRTY 0x01 /* something needs to be logged */ |
| #define XFS_TRANS_SB_DIRTY 0x02 /* superblock is modified */ |
| #define XFS_TRANS_PERM_LOG_RES 0x04 /* xact took a permanent log res */ |
| #define XFS_TRANS_SYNC 0x08 /* make commit synchronous */ |
| #define XFS_TRANS_DQ_DIRTY 0x10 /* at least one dquot in trx dirty */ |
| #define XFS_TRANS_RESERVE 0x20 /* OK to use reserved data blocks */ |
| #define XFS_TRANS_NO_WRITECOUNT 0x40 /* do not elevate SB writecount */ |
| #define XFS_TRANS_NOFS 0x80 /* pass KM_NOFS to kmem_alloc */ |
| |
| /* |
| * Field values for xfs_trans_mod_sb. |
| */ |
| #define XFS_TRANS_SB_ICOUNT 0x00000001 |
| #define XFS_TRANS_SB_IFREE 0x00000002 |
| #define XFS_TRANS_SB_FDBLOCKS 0x00000004 |
| #define XFS_TRANS_SB_RES_FDBLOCKS 0x00000008 |
| #define XFS_TRANS_SB_FREXTENTS 0x00000010 |
| #define XFS_TRANS_SB_RES_FREXTENTS 0x00000020 |
| #define XFS_TRANS_SB_DBLOCKS 0x00000040 |
| #define XFS_TRANS_SB_AGCOUNT 0x00000080 |
| #define XFS_TRANS_SB_IMAXPCT 0x00000100 |
| #define XFS_TRANS_SB_REXTSIZE 0x00000200 |
| #define XFS_TRANS_SB_RBMBLOCKS 0x00000400 |
| #define XFS_TRANS_SB_RBLOCKS 0x00000800 |
| #define XFS_TRANS_SB_REXTENTS 0x00001000 |
| #define XFS_TRANS_SB_REXTSLOG 0x00002000 |
| |
| /* |
| * Here we centralize the specification of XFS meta-data buffer reference count |
| * values. This determines how hard the buffer cache tries to hold onto the |
| * buffer. |
| */ |
| #define XFS_AGF_REF 4 |
| #define XFS_AGI_REF 4 |
| #define XFS_AGFL_REF 3 |
| #define XFS_INO_BTREE_REF 3 |
| #define XFS_ALLOC_BTREE_REF 2 |
| #define XFS_BMAP_BTREE_REF 2 |
| #define XFS_RMAP_BTREE_REF 2 |
| #define XFS_DIR_BTREE_REF 2 |
| #define XFS_INO_REF 2 |
| #define XFS_ATTR_BTREE_REF 1 |
| #define XFS_DQUOT_REF 1 |
| #define XFS_REFC_BTREE_REF 1 |
| |
| /* |
| * Flags for xfs_trans_ichgtime(). |
| */ |
| #define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */ |
| #define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */ |
| #define XFS_ICHGTIME_CREATE 0x4 /* inode create timestamp */ |
| |
| |
| /* |
| * Symlink decoding/encoding functions |
| */ |
| int xfs_symlink_blocks(struct xfs_mount *mp, int pathlen); |
| int xfs_symlink_hdr_set(struct xfs_mount *mp, xfs_ino_t ino, uint32_t offset, |
| uint32_t size, struct xfs_buf *bp); |
| bool xfs_symlink_hdr_ok(xfs_ino_t ino, uint32_t offset, |
| uint32_t size, struct xfs_buf *bp); |
| void xfs_symlink_local_to_remote(struct xfs_trans *tp, struct xfs_buf *bp, |
| struct xfs_inode *ip, struct xfs_ifork *ifp); |
| |
| #endif /* __XFS_SHARED_H__ */ |
