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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
18#ifndef __XFS_VNODE_H__
19#define __XFS_VNODE_H__
20
Christoph Hellwig2b5decd2008-11-28 14:23:36 +110021#include "xfs_fs.h"
22
Linus Torvalds1da177e2005-04-16 15:20:36 -070023struct file;
Christoph Hellwig2b5decd2008-11-28 14:23:36 +110024struct xfs_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070025struct xfs_iomap;
26struct attrlist_cursor_kern;
27
Linus Torvalds1da177e2005-04-16 15:20:36 -070028/*
Christoph Hellwig739bfb22007-08-29 10:58:01 +100029 * Return values for xfs_inactive. A return value of
Linus Torvalds1da177e2005-04-16 15:20:36 -070030 * VN_INACTIVE_NOCACHE implies that the file system behavior
31 * has disassociated its state and bhv_desc_t from the vnode.
32 */
33#define VN_INACTIVE_CACHE 0
34#define VN_INACTIVE_NOCACHE 1
35
36/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 * Flags for read/write calls - same values as IRIX
38 */
39#define IO_ISAIO 0x00001 /* don't wait for completion */
40#define IO_ISDIRECT 0x00004 /* bypass page cache */
41#define IO_INVIS 0x00020 /* don't update inode timestamps */
42
43/*
David Chinnera3f74ff2008-03-06 13:43:42 +110044 * Flags for xfs_inode_flush
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 */
46#define FLUSH_SYNC 1 /* wait for flush to complete */
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
48/*
Nathan Scott67fcaa72006-06-09 17:00:52 +100049 * Flush/Invalidate options for vop_toss/flush/flushinval_pages.
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 */
51#define FI_NONE 0 /* none */
52#define FI_REMAPF 1 /* Do a remapf prior to the operation */
53#define FI_REMAPF_LOCKED 2 /* Do a remapf prior to the operation.
54 Prevent VM access to the pages until
55 the operation completes. */
56
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
Linus Torvalds1da177e2005-04-16 15:20:36 -070058extern void vn_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
Christoph Hellwigb677c212007-08-29 11:46:28 +100060/*
61 * Yeah, these don't take vnode anymore at all, all this should be
62 * cleaned up at some point.
63 */
64extern void vn_iowait(struct xfs_inode *ip);
65extern void vn_iowake(struct xfs_inode *ip);
66extern void vn_ioerror(struct xfs_inode *ip, int error, char *f, int l);
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
Christoph Hellwig5ec7f8c2008-08-13 16:22:40 +100068static inline int vn_count(struct inode *vp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070069{
Christoph Hellwig863890c2008-08-13 16:12:05 +100070 return atomic_read(&vp->i_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -070071}
72
Christoph Hellwig907f49a2008-08-13 16:13:45 +100073#define IHOLD(ip) \
74do { \
75 ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \
76 atomic_inc(&(VFS_I(ip)->i_count)); \
77 xfs_itrace_hold((ip), __FILE__, __LINE__, (inst_t *)__return_address); \
78} while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
Christoph Hellwig907f49a2008-08-13 16:13:45 +100080#define IRELE(ip) \
81do { \
82 xfs_itrace_rele((ip), __FILE__, __LINE__, (inst_t *)__return_address); \
83 iput(VFS_I(ip)); \
84} while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070085
86/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 * Dealing with bad inodes
88 */
Christoph Hellwig5ec7f8c2008-08-13 16:22:40 +100089static inline int VN_BAD(struct inode *vp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070090{
Christoph Hellwig863890c2008-08-13 16:12:05 +100091 return is_bad_inode(vp);
Linus Torvalds1da177e2005-04-16 15:20:36 -070092}
93
94/*
Nathan Scottca5ccbf2006-01-11 21:03:04 +110095 * Extracting atime values in various formats
96 */
Christoph Hellwig5ec7f8c2008-08-13 16:22:40 +100097static inline void vn_atime_to_bstime(struct inode *vp, xfs_bstime_t *bs_atime)
Nathan Scottca5ccbf2006-01-11 21:03:04 +110098{
Christoph Hellwig0a74cd12007-08-29 11:53:12 +100099 bs_atime->tv_sec = vp->i_atime.tv_sec;
100 bs_atime->tv_nsec = vp->i_atime.tv_nsec;
Nathan Scottca5ccbf2006-01-11 21:03:04 +1100101}
102
Christoph Hellwig5ec7f8c2008-08-13 16:22:40 +1000103static inline void vn_atime_to_timespec(struct inode *vp, struct timespec *ts)
Nathan Scottca5ccbf2006-01-11 21:03:04 +1100104{
Christoph Hellwig0a74cd12007-08-29 11:53:12 +1000105 *ts = vp->i_atime;
Nathan Scottca5ccbf2006-01-11 21:03:04 +1100106}
107
Christoph Hellwig5ec7f8c2008-08-13 16:22:40 +1000108static inline void vn_atime_to_time_t(struct inode *vp, time_t *tt)
Nathan Scottca5ccbf2006-01-11 21:03:04 +1100109{
Christoph Hellwig0a74cd12007-08-29 11:53:12 +1000110 *tt = vp->i_atime.tv_sec;
Nathan Scottca5ccbf2006-01-11 21:03:04 +1100111}
112
113/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 * Some useful predicates.
115 */
Christoph Hellwig863890c2008-08-13 16:12:05 +1000116#define VN_MAPPED(vp) mapping_mapped(vp->i_mapping)
117#define VN_CACHED(vp) (vp->i_mapping->nrpages)
118#define VN_DIRTY(vp) mapping_tagged(vp->i_mapping, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 PAGECACHE_TAG_DIRTY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
122/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 * Tracking vnode activity.
124 */
Lachlan McIlroycf441ee2008-02-07 16:42:19 +1100125#if defined(XFS_INODE_TRACE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
Lachlan McIlroycf441ee2008-02-07 16:42:19 +1100127#define INODE_TRACE_SIZE 16 /* number of trace entries */
128#define INODE_KTRACE_ENTRY 1
129#define INODE_KTRACE_EXIT 2
130#define INODE_KTRACE_HOLD 3
131#define INODE_KTRACE_REF 4
132#define INODE_KTRACE_RELE 5
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
Lachlan McIlroycf441ee2008-02-07 16:42:19 +1100134extern void _xfs_itrace_entry(struct xfs_inode *, const char *, inst_t *);
135extern void _xfs_itrace_exit(struct xfs_inode *, const char *, inst_t *);
136extern void xfs_itrace_hold(struct xfs_inode *, char *, int, inst_t *);
137extern void _xfs_itrace_ref(struct xfs_inode *, char *, int, inst_t *);
138extern void xfs_itrace_rele(struct xfs_inode *, char *, int, inst_t *);
139#define xfs_itrace_entry(ip) \
Harvey Harrison34a622b2008-04-10 12:19:21 +1000140 _xfs_itrace_entry(ip, __func__, (inst_t *)__return_address)
Lachlan McIlroycf441ee2008-02-07 16:42:19 +1100141#define xfs_itrace_exit(ip) \
Harvey Harrison34a622b2008-04-10 12:19:21 +1000142 _xfs_itrace_exit(ip, __func__, (inst_t *)__return_address)
Lachlan McIlroy15947f22007-09-17 13:11:58 +1000143#define xfs_itrace_exit_tag(ip, tag) \
144 _xfs_itrace_exit(ip, tag, (inst_t *)__return_address)
Lachlan McIlroycf441ee2008-02-07 16:42:19 +1100145#define xfs_itrace_ref(ip) \
146 _xfs_itrace_ref(ip, __FILE__, __LINE__, (inst_t *)__return_address)
147
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148#else
Lachlan McIlroycf441ee2008-02-07 16:42:19 +1100149#define xfs_itrace_entry(a)
150#define xfs_itrace_exit(a)
Lachlan McIlroy15947f22007-09-17 13:11:58 +1000151#define xfs_itrace_exit_tag(a, b)
Lachlan McIlroycf441ee2008-02-07 16:42:19 +1100152#define xfs_itrace_hold(a, b, c, d)
153#define xfs_itrace_ref(a)
154#define xfs_itrace_rele(a, b, c, d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155#endif
156
157#endif /* __XFS_VNODE_H__ */