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__
25 struct attrlist_cursor_kern;
27 typedef struct dentry bhv_vname_t;
28 typedef __u64 bhv_vnumber_t;
30 typedef struct bhv_vnode {
31 bhv_vnumber_t v_number; /* in-core vnode number */
32 atomic_t v_iocount; /* outstanding I/O count */
33 #ifdef XFS_VNODE_TRACE
34 struct ktrace *v_trace; /* trace header structure */
36 struct inode v_inode; /* Linux inode */
37 /* inode MUST be last */
40 #define VN_ISLNK(vp) S_ISLNK((vp)->v_inode.i_mode)
41 #define VN_ISREG(vp) S_ISREG((vp)->v_inode.i_mode)
42 #define VN_ISDIR(vp) S_ISDIR((vp)->v_inode.i_mode)
43 #define VN_ISCHR(vp) S_ISCHR((vp)->v_inode.i_mode)
44 #define VN_ISBLK(vp) S_ISBLK((vp)->v_inode.i_mode)
47 * Vnode to Linux inode mapping.
49 static inline struct bhv_vnode *vn_from_inode(struct inode *inode)
51 return container_of(inode, bhv_vnode_t, v_inode);
53 static inline struct inode *vn_to_inode(struct bhv_vnode *vnode)
55 return &vnode->v_inode;
59 * Values for the vop_rwlock/rwunlock flags parameter.
61 typedef enum bhv_vrwlock {
71 * Return values for xfs_inactive. A return value of
72 * VN_INACTIVE_NOCACHE implies that the file system behavior
73 * has disassociated its state and bhv_desc_t from the vnode.
75 #define VN_INACTIVE_CACHE 0
76 #define VN_INACTIVE_NOCACHE 1
79 * Flags for read/write calls - same values as IRIX
81 #define IO_ISAIO 0x00001 /* don't wait for completion */
82 #define IO_ISDIRECT 0x00004 /* bypass page cache */
83 #define IO_INVIS 0x00020 /* don't update inode timestamps */
86 * Flags for vop_iflush call
88 #define FLUSH_SYNC 1 /* wait for flush to complete */
89 #define FLUSH_INODE 2 /* flush the inode itself */
90 #define FLUSH_LOG 4 /* force the last log entry for
91 * this inode out to disk */
94 * Flush/Invalidate options for vop_toss/flush/flushinval_pages.
96 #define FI_NONE 0 /* none */
97 #define FI_REMAPF 1 /* Do a remapf prior to the operation */
98 #define FI_REMAPF_LOCKED 2 /* Do a remapf prior to the operation.
99 Prevent VM access to the pages until
100 the operation completes. */
103 * Vnode attributes. va_mask indicates those attributes the caller
104 * wants to set or extract.
106 typedef struct bhv_vattr {
107 int va_mask; /* bit-mask of attributes present */
108 mode_t va_mode; /* file access mode and type */
109 xfs_nlink_t va_nlink; /* number of references to file */
110 uid_t va_uid; /* owner user id */
111 gid_t va_gid; /* owner group id */
112 xfs_ino_t va_nodeid; /* file id */
113 xfs_off_t va_size; /* file size in bytes */
114 u_long va_blocksize; /* blocksize preferred for i/o */
115 struct timespec va_atime; /* time of last access */
116 struct timespec va_mtime; /* time of last modification */
117 struct timespec va_ctime; /* time file changed */
118 u_int va_gen; /* generation number of file */
119 xfs_dev_t va_rdev; /* device the special file represents */
120 __int64_t va_nblocks; /* number of blocks allocated */
121 u_long va_xflags; /* random extended file flags */
122 u_long va_extsize; /* file extent size */
123 u_long va_nextents; /* number of extents in file */
124 u_long va_anextents; /* number of attr extents in file */
125 prid_t va_projid; /* project id */
129 * setattr or getattr attributes
131 #define XFS_AT_TYPE 0x00000001
132 #define XFS_AT_MODE 0x00000002
133 #define XFS_AT_UID 0x00000004
134 #define XFS_AT_GID 0x00000008
135 #define XFS_AT_FSID 0x00000010
136 #define XFS_AT_NODEID 0x00000020
137 #define XFS_AT_NLINK 0x00000040
138 #define XFS_AT_SIZE 0x00000080
139 #define XFS_AT_ATIME 0x00000100
140 #define XFS_AT_MTIME 0x00000200
141 #define XFS_AT_CTIME 0x00000400
142 #define XFS_AT_RDEV 0x00000800
143 #define XFS_AT_BLKSIZE 0x00001000
144 #define XFS_AT_NBLOCKS 0x00002000
145 #define XFS_AT_VCODE 0x00004000
146 #define XFS_AT_MAC 0x00008000
147 #define XFS_AT_UPDATIME 0x00010000
148 #define XFS_AT_UPDMTIME 0x00020000
149 #define XFS_AT_UPDCTIME 0x00040000
150 #define XFS_AT_ACL 0x00080000
151 #define XFS_AT_CAP 0x00100000
152 #define XFS_AT_INF 0x00200000
153 #define XFS_AT_XFLAGS 0x00400000
154 #define XFS_AT_EXTSIZE 0x00800000
155 #define XFS_AT_NEXTENTS 0x01000000
156 #define XFS_AT_ANEXTENTS 0x02000000
157 #define XFS_AT_PROJID 0x04000000
158 #define XFS_AT_SIZE_NOPERM 0x08000000
159 #define XFS_AT_GENCOUNT 0x10000000
161 #define XFS_AT_ALL (XFS_AT_TYPE|XFS_AT_MODE|XFS_AT_UID|XFS_AT_GID|\
162 XFS_AT_FSID|XFS_AT_NODEID|XFS_AT_NLINK|XFS_AT_SIZE|\
163 XFS_AT_ATIME|XFS_AT_MTIME|XFS_AT_CTIME|XFS_AT_RDEV|\
164 XFS_AT_BLKSIZE|XFS_AT_NBLOCKS|XFS_AT_VCODE|XFS_AT_MAC|\
165 XFS_AT_ACL|XFS_AT_CAP|XFS_AT_INF|XFS_AT_XFLAGS|XFS_AT_EXTSIZE|\
166 XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|XFS_AT_PROJID|XFS_AT_GENCOUNT)
168 #define XFS_AT_STAT (XFS_AT_TYPE|XFS_AT_MODE|XFS_AT_UID|XFS_AT_GID|\
169 XFS_AT_FSID|XFS_AT_NODEID|XFS_AT_NLINK|XFS_AT_SIZE|\
170 XFS_AT_ATIME|XFS_AT_MTIME|XFS_AT_CTIME|XFS_AT_RDEV|\
171 XFS_AT_BLKSIZE|XFS_AT_NBLOCKS|XFS_AT_PROJID)
173 #define XFS_AT_TIMES (XFS_AT_ATIME|XFS_AT_MTIME|XFS_AT_CTIME)
175 #define XFS_AT_UPDTIMES (XFS_AT_UPDATIME|XFS_AT_UPDMTIME|XFS_AT_UPDCTIME)
177 #define XFS_AT_NOSET (XFS_AT_NLINK|XFS_AT_RDEV|XFS_AT_FSID|XFS_AT_NODEID|\
178 XFS_AT_TYPE|XFS_AT_BLKSIZE|XFS_AT_NBLOCKS|XFS_AT_VCODE|\
179 XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|XFS_AT_GENCOUNT)
184 #define VSUID S_ISUID /* set user id on execution */
185 #define VSGID S_ISGID /* set group id on execution */
186 #define VSVTX S_ISVTX /* save swapped text even after use */
187 #define VREAD S_IRUSR /* read, write, execute permissions */
188 #define VWRITE S_IWUSR
189 #define VEXEC S_IXUSR
191 #define MODEMASK S_IALLUGO /* mode bits plus permission bits */
194 * Check whether mandatory file locking is enabled.
196 #define MANDLOCK(vp, mode) \
197 (VN_ISREG(vp) && ((mode) & (VSGID|(VEXEC>>3))) == VSGID)
199 extern void vn_init(void);
200 extern bhv_vnode_t *vn_initialize(struct inode *);
201 extern int vn_revalidate(struct bhv_vnode *);
202 extern int __vn_revalidate(struct bhv_vnode *, bhv_vattr_t *);
203 extern void vn_revalidate_core(struct bhv_vnode *, bhv_vattr_t *);
205 extern void vn_iowait(struct bhv_vnode *vp);
206 extern void vn_iowake(struct bhv_vnode *vp);
208 extern void vn_ioerror(struct bhv_vnode *vp, int error, char *f, int l);
210 static inline int vn_count(struct bhv_vnode *vp)
212 return atomic_read(&vn_to_inode(vp)->i_count);
216 * Vnode reference counting functions (and macros for compatibility).
218 extern bhv_vnode_t *vn_hold(struct bhv_vnode *);
220 #if defined(XFS_VNODE_TRACE)
221 #define VN_HOLD(vp) \
222 ((void)vn_hold(vp), \
223 vn_trace_hold(vp, __FILE__, __LINE__, (inst_t *)__return_address))
224 #define VN_RELE(vp) \
225 (vn_trace_rele(vp, __FILE__, __LINE__, (inst_t *)__return_address), \
226 iput(vn_to_inode(vp)))
228 #define VN_HOLD(vp) ((void)vn_hold(vp))
229 #define VN_RELE(vp) (iput(vn_to_inode(vp)))
232 static inline struct bhv_vnode *vn_grab(struct bhv_vnode *vp)
234 struct inode *inode = igrab(vn_to_inode(vp));
235 return inode ? vn_from_inode(inode) : NULL;
239 * Vname handling macros.
241 #define VNAME(dentry) ((char *) (dentry)->d_name.name)
242 #define VNAMELEN(dentry) ((dentry)->d_name.len)
243 #define VNAME_TO_VNODE(dentry) (vn_from_inode((dentry)->d_inode))
246 * Dealing with bad inodes
248 static inline void vn_mark_bad(struct bhv_vnode *vp)
250 make_bad_inode(vn_to_inode(vp));
253 static inline int VN_BAD(struct bhv_vnode *vp)
255 return is_bad_inode(vn_to_inode(vp));
259 * Extracting atime values in various formats
261 static inline void vn_atime_to_bstime(bhv_vnode_t *vp, xfs_bstime_t *bs_atime)
263 bs_atime->tv_sec = vp->v_inode.i_atime.tv_sec;
264 bs_atime->tv_nsec = vp->v_inode.i_atime.tv_nsec;
267 static inline void vn_atime_to_timespec(bhv_vnode_t *vp, struct timespec *ts)
269 *ts = vp->v_inode.i_atime;
272 static inline void vn_atime_to_time_t(bhv_vnode_t *vp, time_t *tt)
274 *tt = vp->v_inode.i_atime.tv_sec;
278 * Some useful predicates.
280 #define VN_MAPPED(vp) mapping_mapped(vn_to_inode(vp)->i_mapping)
281 #define VN_CACHED(vp) (vn_to_inode(vp)->i_mapping->nrpages)
282 #define VN_DIRTY(vp) mapping_tagged(vn_to_inode(vp)->i_mapping, \
286 * Flags to vop_setattr/getattr.
288 #define ATTR_UTIME 0x01 /* non-default utime(2) request */
289 #define ATTR_DMI 0x08 /* invocation from a DMI function */
290 #define ATTR_LAZY 0x80 /* set/get attributes lazily */
291 #define ATTR_NONBLOCK 0x100 /* return EAGAIN if operation would block */
292 #define ATTR_NOLOCK 0x200 /* Don't grab any conflicting locks */
293 #define ATTR_NOSIZETOK 0x400 /* Don't get the SIZE token */
296 * Flags to vop_fsync/reclaim.
298 #define FSYNC_NOWAIT 0 /* asynchronous flush */
299 #define FSYNC_WAIT 0x1 /* synchronous fsync or forced reclaim */
300 #define FSYNC_INVAL 0x2 /* flush and invalidate cached data */
301 #define FSYNC_DATA 0x4 /* synchronous fsync of data only */
304 * Tracking vnode activity.
306 #if defined(XFS_VNODE_TRACE)
308 #define VNODE_TRACE_SIZE 16 /* number of trace entries */
309 #define VNODE_KTRACE_ENTRY 1
310 #define VNODE_KTRACE_EXIT 2
311 #define VNODE_KTRACE_HOLD 3
312 #define VNODE_KTRACE_REF 4
313 #define VNODE_KTRACE_RELE 5
315 extern void vn_trace_entry(struct bhv_vnode *, const char *, inst_t *);
316 extern void vn_trace_exit(struct bhv_vnode *, const char *, inst_t *);
317 extern void vn_trace_hold(struct bhv_vnode *, char *, int, inst_t *);
318 extern void vn_trace_ref(struct bhv_vnode *, char *, int, inst_t *);
319 extern void vn_trace_rele(struct bhv_vnode *, char *, int, inst_t *);
321 #define VN_TRACE(vp) \
322 vn_trace_ref(vp, __FILE__, __LINE__, (inst_t *)__return_address)
324 #define vn_trace_entry(a,b,c)
325 #define vn_trace_exit(a,b,c)
326 #define vn_trace_hold(a,b,c,d)
327 #define vn_trace_ref(a,b,c,d)
328 #define vn_trace_rele(a,b,c,d)
332 #endif /* __XFS_VNODE_H__ */