2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
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.
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.
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
18 #ifndef __XFS_VNODE_H__
19 #define __XFS_VNODE_H__
23 struct attrlist_cursor_kern;
25 typedef struct inode bhv_vnode_t;
28 * Return values for xfs_inactive. A return value of
29 * VN_INACTIVE_NOCACHE implies that the file system behavior
30 * has disassociated its state and bhv_desc_t from the vnode.
32 #define VN_INACTIVE_CACHE 0
33 #define VN_INACTIVE_NOCACHE 1
36 * Flags for read/write calls - same values as IRIX
38 #define IO_ISAIO 0x00001 /* don't wait for completion */
39 #define IO_ISDIRECT 0x00004 /* bypass page cache */
40 #define IO_INVIS 0x00020 /* don't update inode timestamps */
43 * Flags for xfs_inode_flush
45 #define FLUSH_SYNC 1 /* wait for flush to complete */
48 * Flush/Invalidate options for vop_toss/flush/flushinval_pages.
50 #define FI_NONE 0 /* none */
51 #define FI_REMAPF 1 /* Do a remapf prior to the operation */
52 #define FI_REMAPF_LOCKED 2 /* Do a remapf prior to the operation.
53 Prevent VM access to the pages until
54 the operation completes. */
57 extern void vn_init(void);
60 * Yeah, these don't take vnode anymore at all, all this should be
61 * cleaned up at some point.
63 extern void vn_iowait(struct xfs_inode *ip);
64 extern void vn_iowake(struct xfs_inode *ip);
65 extern void vn_ioerror(struct xfs_inode *ip, int error, char *f, int l);
67 static inline int vn_count(bhv_vnode_t *vp)
69 return atomic_read(&vp->i_count);
73 * Vnode reference counting functions (and macros for compatibility).
75 extern bhv_vnode_t *vn_hold(bhv_vnode_t *);
77 #if defined(XFS_INODE_TRACE)
80 xfs_itrace_hold(XFS_I(vp), __FILE__, __LINE__, (inst_t *)__return_address))
82 (xfs_itrace_rele(XFS_I(vp), __FILE__, __LINE__, (inst_t *)__return_address), \
85 #define VN_HOLD(vp) ((void)vn_hold(vp))
86 #define VN_RELE(vp) (iput(vp))
89 static inline bhv_vnode_t *vn_grab(bhv_vnode_t *vp)
95 * Dealing with bad inodes
97 static inline int VN_BAD(bhv_vnode_t *vp)
99 return is_bad_inode(vp);
103 * Extracting atime values in various formats
105 static inline void vn_atime_to_bstime(bhv_vnode_t *vp, xfs_bstime_t *bs_atime)
107 bs_atime->tv_sec = vp->i_atime.tv_sec;
108 bs_atime->tv_nsec = vp->i_atime.tv_nsec;
111 static inline void vn_atime_to_timespec(bhv_vnode_t *vp, struct timespec *ts)
116 static inline void vn_atime_to_time_t(bhv_vnode_t *vp, time_t *tt)
118 *tt = vp->i_atime.tv_sec;
122 * Some useful predicates.
124 #define VN_MAPPED(vp) mapping_mapped(vp->i_mapping)
125 #define VN_CACHED(vp) (vp->i_mapping->nrpages)
126 #define VN_DIRTY(vp) mapping_tagged(vp->i_mapping, \
131 * Tracking vnode activity.
133 #if defined(XFS_INODE_TRACE)
135 #define INODE_TRACE_SIZE 16 /* number of trace entries */
136 #define INODE_KTRACE_ENTRY 1
137 #define INODE_KTRACE_EXIT 2
138 #define INODE_KTRACE_HOLD 3
139 #define INODE_KTRACE_REF 4
140 #define INODE_KTRACE_RELE 5
142 extern void _xfs_itrace_entry(struct xfs_inode *, const char *, inst_t *);
143 extern void _xfs_itrace_exit(struct xfs_inode *, const char *, inst_t *);
144 extern void xfs_itrace_hold(struct xfs_inode *, char *, int, inst_t *);
145 extern void _xfs_itrace_ref(struct xfs_inode *, char *, int, inst_t *);
146 extern void xfs_itrace_rele(struct xfs_inode *, char *, int, inst_t *);
147 #define xfs_itrace_entry(ip) \
148 _xfs_itrace_entry(ip, __func__, (inst_t *)__return_address)
149 #define xfs_itrace_exit(ip) \
150 _xfs_itrace_exit(ip, __func__, (inst_t *)__return_address)
151 #define xfs_itrace_exit_tag(ip, tag) \
152 _xfs_itrace_exit(ip, tag, (inst_t *)__return_address)
153 #define xfs_itrace_ref(ip) \
154 _xfs_itrace_ref(ip, __FILE__, __LINE__, (inst_t *)__return_address)
157 #define xfs_itrace_entry(a)
158 #define xfs_itrace_exit(a)
159 #define xfs_itrace_exit_tag(a, b)
160 #define xfs_itrace_hold(a, b, c, d)
161 #define xfs_itrace_ref(a)
162 #define xfs_itrace_rele(a, b, c, d)
165 #endif /* __XFS_VNODE_H__ */