2 * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it would be useful, but
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12 * Further, this software is distributed without any warranty that it is
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15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
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20 * with this program; if not, write the Free Software Foundation, Inc., 59
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32 * Portions Copyright (c) 1989, 1993
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59 #ifndef __XFS_VNODE_H__
60 #define __XFS_VNODE_H__
66 struct attrlist_cursor_kern;
69 * Vnode types. VNON means no type.
71 enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VFIFO, VBAD, VSOCK };
73 typedef xfs_ino_t vnumber_t;
74 typedef struct dentry vname_t;
75 typedef bhv_head_t vn_bhv_head_t;
78 * MP locking protocols:
79 * v_flag, v_vfsp VN_LOCK/VN_UNLOCK
80 * v_type read-only or fs-dependent
82 typedef struct vnode {
83 __u32 v_flag; /* vnode flags (see below) */
84 enum vtype v_type; /* vnode type */
85 struct vfs *v_vfsp; /* ptr to containing VFS */
86 vnumber_t v_number; /* in-core vnode number */
87 vn_bhv_head_t v_bh; /* behavior head */
88 spinlock_t v_lock; /* VN_LOCK/VN_UNLOCK */
89 struct inode v_inode; /* Linux inode */
90 #ifdef XFS_VNODE_TRACE
91 struct ktrace *v_trace; /* trace header structure */
95 #define v_fbhv v_bh.bh_first /* first behavior */
96 #define v_fops v_bh.bh_first->bd_ops /* first behavior ops */
98 #define VNODE_POSITION_BASE BHV_POSITION_BASE /* chain bottom */
99 #define VNODE_POSITION_TOP BHV_POSITION_TOP /* chain top */
100 #define VNODE_POSITION_INVALID BHV_POSITION_INVALID /* invalid pos. num */
103 VN_BHV_UNKNOWN, /* not specified */
104 VN_BHV_XFS, /* xfs */
105 VN_BHV_DM, /* data migration */
106 VN_BHV_QM, /* quota manager */
107 VN_BHV_IO, /* IO path */
108 VN_BHV_END /* housekeeping end-of-range */
111 #define VNODE_POSITION_XFS (VNODE_POSITION_BASE)
112 #define VNODE_POSITION_DM (VNODE_POSITION_BASE+10)
113 #define VNODE_POSITION_QM (VNODE_POSITION_BASE+20)
114 #define VNODE_POSITION_IO (VNODE_POSITION_BASE+30)
117 * Macros for dealing with the behavior descriptor inside of the vnode.
119 #define BHV_TO_VNODE(bdp) ((vnode_t *)BHV_VOBJ(bdp))
120 #define BHV_TO_VNODE_NULL(bdp) ((vnode_t *)BHV_VOBJNULL(bdp))
122 #define VN_BHV_HEAD(vp) ((bhv_head_t *)(&((vp)->v_bh)))
123 #define vn_bhv_head_init(bhp,name) bhv_head_init(bhp,name)
124 #define vn_bhv_remove(bhp,bdp) bhv_remove(bhp,bdp)
125 #define vn_bhv_lookup(bhp,ops) bhv_lookup(bhp,ops)
126 #define vn_bhv_lookup_unlocked(bhp,ops) bhv_lookup_unlocked(bhp,ops)
129 * Vnode to Linux inode mapping.
131 #define LINVFS_GET_VP(inode) ((vnode_t *)list_entry(inode, vnode_t, v_inode))
132 #define LINVFS_GET_IP(vp) (&(vp)->v_inode)
135 * Convert between vnode types and inode formats (since POSIX.1
136 * defines mode word of stat structure in terms of inode formats).
138 extern enum vtype iftovt_tab[];
139 extern u_short vttoif_tab[];
140 #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12])
141 #define VTTOIF(indx) (vttoif_tab[(int)(indx)])
142 #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
148 #define VINACT 0x1 /* vnode is being inactivated */
149 #define VRECLM 0x2 /* vnode is being reclaimed */
150 #define VWAIT 0x4 /* waiting for VINACT/VRECLM to end */
151 #define VMODIFIED 0x8 /* XFS inode state possibly differs */
152 /* to the Linux inode state. */
155 * Values for the VOP_RWLOCK and VOP_RWUNLOCK flags parameter.
157 typedef enum vrwlock {
161 VRWLOCK_WRITE_DIRECT,
167 * Return values for VOP_INACTIVE. A return value of
168 * VN_INACTIVE_NOCACHE implies that the file system behavior
169 * has disassociated its state and bhv_desc_t from the vnode.
171 #define VN_INACTIVE_CACHE 0
172 #define VN_INACTIVE_NOCACHE 1
175 * Values for the cmd code given to VOP_VNODE_CHANGE.
177 typedef enum vchange {
178 VCHANGE_FLAGS_FRLOCKS = 0,
179 VCHANGE_FLAGS_ENF_LOCKING = 1,
180 VCHANGE_FLAGS_TRUNCATED = 2,
181 VCHANGE_FLAGS_PAGE_DIRTY = 3,
182 VCHANGE_FLAGS_IOEXCL_COUNT = 4
186 typedef int (*vop_open_t)(bhv_desc_t *, struct cred *);
187 typedef ssize_t (*vop_read_t)(bhv_desc_t *, struct file *, char *,
188 size_t, loff_t *, int, struct cred *);
189 typedef ssize_t (*vop_write_t)(bhv_desc_t *, struct file *, const char *,
190 size_t, loff_t *, int, struct cred *);
191 typedef int (*vop_ioctl_t)(bhv_desc_t *, struct inode *, struct file *,
192 int, unsigned int, unsigned long);
193 typedef int (*vop_getattr_t)(bhv_desc_t *, struct vattr *, int,
195 typedef int (*vop_setattr_t)(bhv_desc_t *, struct vattr *, int,
197 typedef int (*vop_access_t)(bhv_desc_t *, int, struct cred *);
198 typedef int (*vop_lookup_t)(bhv_desc_t *, vname_t *, vnode_t **,
199 int, vnode_t *, struct cred *);
200 typedef int (*vop_create_t)(bhv_desc_t *, vname_t *, struct vattr *,
201 vnode_t **, struct cred *);
202 typedef int (*vop_remove_t)(bhv_desc_t *, vname_t *, struct cred *);
203 typedef int (*vop_link_t)(bhv_desc_t *, vnode_t *, vname_t *,
205 typedef int (*vop_rename_t)(bhv_desc_t *, vname_t *, vnode_t *, vname_t *,
207 typedef int (*vop_mkdir_t)(bhv_desc_t *, vname_t *, struct vattr *,
208 vnode_t **, struct cred *);
209 typedef int (*vop_rmdir_t)(bhv_desc_t *, vname_t *, struct cred *);
210 typedef int (*vop_readdir_t)(bhv_desc_t *, struct uio *, struct cred *,
212 typedef int (*vop_symlink_t)(bhv_desc_t *, vname_t *, struct vattr *,
213 char *, vnode_t **, struct cred *);
214 typedef int (*vop_readlink_t)(bhv_desc_t *, struct uio *, int,
216 typedef int (*vop_fsync_t)(bhv_desc_t *, int, struct cred *,
217 xfs_off_t, xfs_off_t);
218 typedef int (*vop_inactive_t)(bhv_desc_t *, struct cred *);
219 typedef int (*vop_fid2_t)(bhv_desc_t *, struct fid *);
220 typedef int (*vop_release_t)(bhv_desc_t *);
221 typedef int (*vop_rwlock_t)(bhv_desc_t *, vrwlock_t);
222 typedef void (*vop_rwunlock_t)(bhv_desc_t *, vrwlock_t);
223 typedef int (*vop_frlock_t)(bhv_desc_t *, int, struct file_lock *,int,
224 xfs_off_t, struct cred *);
225 typedef int (*vop_bmap_t)(bhv_desc_t *, xfs_off_t, ssize_t, int,
226 struct xfs_iomap *, int *);
227 typedef int (*vop_reclaim_t)(bhv_desc_t *);
228 typedef int (*vop_attr_get_t)(bhv_desc_t *, char *, char *, int *, int,
230 typedef int (*vop_attr_set_t)(bhv_desc_t *, char *, char *, int, int,
232 typedef int (*vop_attr_remove_t)(bhv_desc_t *, char *, int, struct cred *);
233 typedef int (*vop_attr_list_t)(bhv_desc_t *, char *, int, int,
234 struct attrlist_cursor_kern *, struct cred *);
235 typedef void (*vop_link_removed_t)(bhv_desc_t *, vnode_t *, int);
236 typedef void (*vop_vnode_change_t)(bhv_desc_t *, vchange_t, __psint_t);
237 typedef void (*vop_ptossvp_t)(bhv_desc_t *, xfs_off_t, xfs_off_t, int);
238 typedef void (*vop_pflushinvalvp_t)(bhv_desc_t *, xfs_off_t, xfs_off_t, int);
239 typedef int (*vop_pflushvp_t)(bhv_desc_t *, xfs_off_t, xfs_off_t,
241 typedef int (*vop_iflush_t)(bhv_desc_t *, int);
244 typedef struct vnodeops {
245 bhv_position_t vn_position; /* position within behavior chain */
248 vop_write_t vop_write;
249 vop_ioctl_t vop_ioctl;
250 vop_getattr_t vop_getattr;
251 vop_setattr_t vop_setattr;
252 vop_access_t vop_access;
253 vop_lookup_t vop_lookup;
254 vop_create_t vop_create;
255 vop_remove_t vop_remove;
257 vop_rename_t vop_rename;
258 vop_mkdir_t vop_mkdir;
259 vop_rmdir_t vop_rmdir;
260 vop_readdir_t vop_readdir;
261 vop_symlink_t vop_symlink;
262 vop_readlink_t vop_readlink;
263 vop_fsync_t vop_fsync;
264 vop_inactive_t vop_inactive;
266 vop_rwlock_t vop_rwlock;
267 vop_rwunlock_t vop_rwunlock;
268 vop_frlock_t vop_frlock;
270 vop_reclaim_t vop_reclaim;
271 vop_attr_get_t vop_attr_get;
272 vop_attr_set_t vop_attr_set;
273 vop_attr_remove_t vop_attr_remove;
274 vop_attr_list_t vop_attr_list;
275 vop_link_removed_t vop_link_removed;
276 vop_vnode_change_t vop_vnode_change;
277 vop_ptossvp_t vop_tosspages;
278 vop_pflushinvalvp_t vop_flushinval_pages;
279 vop_pflushvp_t vop_flush_pages;
280 vop_release_t vop_release;
281 vop_iflush_t vop_iflush;
287 #define _VOP_(op, vp) (*((vnodeops_t *)(vp)->v_fops)->op)
289 #define VOP_READ(vp,file,buf,size,offset,ioflags,cr,rv) \
290 rv = _VOP_(vop_read, vp)((vp)->v_fbhv,file,buf,size,offset,ioflags,cr)
291 #define VOP_WRITE(vp,file,buf,size,offset,ioflags,cr,rv) \
292 rv = _VOP_(vop_write, vp)((vp)->v_fbhv,file,buf,size,offset,ioflags,cr)
293 #define VOP_BMAP(vp,of,sz,rw,b,n,rv) \
294 rv = _VOP_(vop_bmap, vp)((vp)->v_fbhv,of,sz,rw,b,n)
295 #define VOP_OPEN(vp, cr, rv) \
296 rv = _VOP_(vop_open, vp)((vp)->v_fbhv, cr)
297 #define VOP_GETATTR(vp, vap, f, cr, rv) \
298 rv = _VOP_(vop_getattr, vp)((vp)->v_fbhv, vap, f, cr)
299 #define VOP_SETATTR(vp, vap, f, cr, rv) \
300 rv = _VOP_(vop_setattr, vp)((vp)->v_fbhv, vap, f, cr)
301 #define VOP_ACCESS(vp, mode, cr, rv) \
302 rv = _VOP_(vop_access, vp)((vp)->v_fbhv, mode, cr)
303 #define VOP_LOOKUP(vp,d,vpp,f,rdir,cr,rv) \
304 rv = _VOP_(vop_lookup, vp)((vp)->v_fbhv,d,vpp,f,rdir,cr)
305 #define VOP_CREATE(dvp,d,vap,vpp,cr,rv) \
306 rv = _VOP_(vop_create, dvp)((dvp)->v_fbhv,d,vap,vpp,cr)
307 #define VOP_REMOVE(dvp,d,cr,rv) \
308 rv = _VOP_(vop_remove, dvp)((dvp)->v_fbhv,d,cr)
309 #define VOP_LINK(tdvp,fvp,d,cr,rv) \
310 rv = _VOP_(vop_link, tdvp)((tdvp)->v_fbhv,fvp,d,cr)
311 #define VOP_RENAME(fvp,fnm,tdvp,tnm,cr,rv) \
312 rv = _VOP_(vop_rename, fvp)((fvp)->v_fbhv,fnm,tdvp,tnm,cr)
313 #define VOP_MKDIR(dp,d,vap,vpp,cr,rv) \
314 rv = _VOP_(vop_mkdir, dp)((dp)->v_fbhv,d,vap,vpp,cr)
315 #define VOP_RMDIR(dp,d,cr,rv) \
316 rv = _VOP_(vop_rmdir, dp)((dp)->v_fbhv,d,cr)
317 #define VOP_READDIR(vp,uiop,cr,eofp,rv) \
318 rv = _VOP_(vop_readdir, vp)((vp)->v_fbhv,uiop,cr,eofp)
319 #define VOP_SYMLINK(dvp,d,vap,tnm,vpp,cr,rv) \
320 rv = _VOP_(vop_symlink, dvp) ((dvp)->v_fbhv,d,vap,tnm,vpp,cr)
321 #define VOP_READLINK(vp,uiop,fl,cr,rv) \
322 rv = _VOP_(vop_readlink, vp)((vp)->v_fbhv,uiop,fl,cr)
323 #define VOP_FSYNC(vp,f,cr,b,e,rv) \
324 rv = _VOP_(vop_fsync, vp)((vp)->v_fbhv,f,cr,b,e)
325 #define VOP_INACTIVE(vp, cr, rv) \
326 rv = _VOP_(vop_inactive, vp)((vp)->v_fbhv, cr)
327 #define VOP_RELEASE(vp, rv) \
328 rv = _VOP_(vop_release, vp)((vp)->v_fbhv)
329 #define VOP_FID2(vp, fidp, rv) \
330 rv = _VOP_(vop_fid2, vp)((vp)->v_fbhv, fidp)
331 #define VOP_RWLOCK(vp,i) \
332 (void)_VOP_(vop_rwlock, vp)((vp)->v_fbhv, i)
333 #define VOP_RWLOCK_TRY(vp,i) \
334 _VOP_(vop_rwlock, vp)((vp)->v_fbhv, i)
335 #define VOP_RWUNLOCK(vp,i) \
336 (void)_VOP_(vop_rwunlock, vp)((vp)->v_fbhv, i)
337 #define VOP_FRLOCK(vp,c,fl,flags,offset,fr,rv) \
338 rv = _VOP_(vop_frlock, vp)((vp)->v_fbhv,c,fl,flags,offset,fr)
339 #define VOP_RECLAIM(vp, rv) \
340 rv = _VOP_(vop_reclaim, vp)((vp)->v_fbhv)
341 #define VOP_ATTR_GET(vp, name, val, vallenp, fl, cred, rv) \
342 rv = _VOP_(vop_attr_get, vp)((vp)->v_fbhv,name,val,vallenp,fl,cred)
343 #define VOP_ATTR_SET(vp, name, val, vallen, fl, cred, rv) \
344 rv = _VOP_(vop_attr_set, vp)((vp)->v_fbhv,name,val,vallen,fl,cred)
345 #define VOP_ATTR_REMOVE(vp, name, flags, cred, rv) \
346 rv = _VOP_(vop_attr_remove, vp)((vp)->v_fbhv,name,flags,cred)
347 #define VOP_ATTR_LIST(vp, buf, buflen, fl, cursor, cred, rv) \
348 rv = _VOP_(vop_attr_list, vp)((vp)->v_fbhv,buf,buflen,fl,cursor,cred)
349 #define VOP_LINK_REMOVED(vp, dvp, linkzero) \
350 (void)_VOP_(vop_link_removed, vp)((vp)->v_fbhv, dvp, linkzero)
351 #define VOP_VNODE_CHANGE(vp, cmd, val) \
352 (void)_VOP_(vop_vnode_change, vp)((vp)->v_fbhv,cmd,val)
354 * These are page cache functions that now go thru VOPs.
355 * 'last' parameter is unused and left in for IRIX compatibility
357 #define VOP_TOSS_PAGES(vp, first, last, fiopt) \
358 _VOP_(vop_tosspages, vp)((vp)->v_fbhv,first, last, fiopt)
360 * 'last' parameter is unused and left in for IRIX compatibility
362 #define VOP_FLUSHINVAL_PAGES(vp, first, last, fiopt) \
363 _VOP_(vop_flushinval_pages, vp)((vp)->v_fbhv,first,last,fiopt)
365 * 'last' parameter is unused and left in for IRIX compatibility
367 #define VOP_FLUSH_PAGES(vp, first, last, flags, fiopt, rv) \
368 rv = _VOP_(vop_flush_pages, vp)((vp)->v_fbhv,first,last,flags,fiopt)
369 #define VOP_IOCTL(vp, inode, filp, fl, cmd, arg, rv) \
370 rv = _VOP_(vop_ioctl, vp)((vp)->v_fbhv,inode,filp,fl,cmd,arg)
371 #define VOP_IFLUSH(vp, flags, rv) \
372 rv = _VOP_(vop_iflush, vp)((vp)->v_fbhv, flags)
375 * Flags for read/write calls - same values as IRIX
377 #define IO_ISDIRECT 0x00004 /* bypass page cache */
378 #define IO_INVIS 0x00020 /* don't update inode timestamps */
379 #define IO_ISLOCKED 0x00800 /* don't do inode locking */
382 * Flags for VOP_IFLUSH call
384 #define FLUSH_SYNC 1 /* wait for flush to complete */
385 #define FLUSH_INODE 2 /* flush the inode itself */
386 #define FLUSH_LOG 4 /* force the last log entry for
387 * this inode out to disk */
390 * Flush/Invalidate options for VOP_TOSS_PAGES, VOP_FLUSHINVAL_PAGES and
393 #define FI_NONE 0 /* none */
394 #define FI_REMAPF 1 /* Do a remapf prior to the operation */
395 #define FI_REMAPF_LOCKED 2 /* Do a remapf prior to the operation.
396 Prevent VM access to the pages until
397 the operation completes. */
400 * Vnode attributes. va_mask indicates those attributes the caller
401 * wants to set or extract.
403 typedef struct vattr {
404 int va_mask; /* bit-mask of attributes present */
405 enum vtype va_type; /* vnode type (for create) */
406 mode_t va_mode; /* file access mode and type */
407 nlink_t va_nlink; /* number of references to file */
408 uid_t va_uid; /* owner user id */
409 gid_t va_gid; /* owner group id */
410 xfs_ino_t va_nodeid; /* file id */
411 xfs_off_t va_size; /* file size in bytes */
412 u_long va_blocksize; /* blocksize preferred for i/o */
413 struct timespec va_atime; /* time of last access */
414 struct timespec va_mtime; /* time of last modification */
415 struct timespec va_ctime; /* time file changed */
416 u_int va_gen; /* generation number of file */
417 xfs_dev_t va_rdev; /* device the special file represents */
418 __int64_t va_nblocks; /* number of blocks allocated */
419 u_long va_xflags; /* random extended file flags */
420 u_long va_extsize; /* file extent size */
421 u_long va_nextents; /* number of extents in file */
422 u_long va_anextents; /* number of attr extents in file */
423 int va_projid; /* project id */
427 * setattr or getattr attributes
429 #define XFS_AT_TYPE 0x00000001
430 #define XFS_AT_MODE 0x00000002
431 #define XFS_AT_UID 0x00000004
432 #define XFS_AT_GID 0x00000008
433 #define XFS_AT_FSID 0x00000010
434 #define XFS_AT_NODEID 0x00000020
435 #define XFS_AT_NLINK 0x00000040
436 #define XFS_AT_SIZE 0x00000080
437 #define XFS_AT_ATIME 0x00000100
438 #define XFS_AT_MTIME 0x00000200
439 #define XFS_AT_CTIME 0x00000400
440 #define XFS_AT_RDEV 0x00000800
441 #define XFS_AT_BLKSIZE 0x00001000
442 #define XFS_AT_NBLOCKS 0x00002000
443 #define XFS_AT_VCODE 0x00004000
444 #define XFS_AT_MAC 0x00008000
445 #define XFS_AT_UPDATIME 0x00010000
446 #define XFS_AT_UPDMTIME 0x00020000
447 #define XFS_AT_UPDCTIME 0x00040000
448 #define XFS_AT_ACL 0x00080000
449 #define XFS_AT_CAP 0x00100000
450 #define XFS_AT_INF 0x00200000
451 #define XFS_AT_XFLAGS 0x00400000
452 #define XFS_AT_EXTSIZE 0x00800000
453 #define XFS_AT_NEXTENTS 0x01000000
454 #define XFS_AT_ANEXTENTS 0x02000000
455 #define XFS_AT_PROJID 0x04000000
456 #define XFS_AT_SIZE_NOPERM 0x08000000
457 #define XFS_AT_GENCOUNT 0x10000000
459 #define XFS_AT_ALL (XFS_AT_TYPE|XFS_AT_MODE|XFS_AT_UID|XFS_AT_GID|\
460 XFS_AT_FSID|XFS_AT_NODEID|XFS_AT_NLINK|XFS_AT_SIZE|\
461 XFS_AT_ATIME|XFS_AT_MTIME|XFS_AT_CTIME|XFS_AT_RDEV|\
462 XFS_AT_BLKSIZE|XFS_AT_NBLOCKS|XFS_AT_VCODE|XFS_AT_MAC|\
463 XFS_AT_ACL|XFS_AT_CAP|XFS_AT_INF|XFS_AT_XFLAGS|XFS_AT_EXTSIZE|\
464 XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|XFS_AT_PROJID|XFS_AT_GENCOUNT)
466 #define XFS_AT_STAT (XFS_AT_TYPE|XFS_AT_MODE|XFS_AT_UID|XFS_AT_GID|\
467 XFS_AT_FSID|XFS_AT_NODEID|XFS_AT_NLINK|XFS_AT_SIZE|\
468 XFS_AT_ATIME|XFS_AT_MTIME|XFS_AT_CTIME|XFS_AT_RDEV|\
469 XFS_AT_BLKSIZE|XFS_AT_NBLOCKS|XFS_AT_PROJID)
471 #define XFS_AT_TIMES (XFS_AT_ATIME|XFS_AT_MTIME|XFS_AT_CTIME)
473 #define XFS_AT_UPDTIMES (XFS_AT_UPDATIME|XFS_AT_UPDMTIME|XFS_AT_UPDCTIME)
475 #define XFS_AT_NOSET (XFS_AT_NLINK|XFS_AT_RDEV|XFS_AT_FSID|XFS_AT_NODEID|\
476 XFS_AT_TYPE|XFS_AT_BLKSIZE|XFS_AT_NBLOCKS|XFS_AT_VCODE|\
477 XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|XFS_AT_GENCOUNT)
482 #define VSUID S_ISUID /* set user id on execution */
483 #define VSGID S_ISGID /* set group id on execution */
484 #define VSVTX S_ISVTX /* save swapped text even after use */
485 #define VREAD S_IRUSR /* read, write, execute permissions */
486 #define VWRITE S_IWUSR
487 #define VEXEC S_IXUSR
489 #define MODEMASK S_IALLUGO /* mode bits plus permission bits */
492 * Check whether mandatory file locking is enabled.
494 #define MANDLOCK(vp, mode) \
495 ((vp)->v_type == VREG && ((mode) & (VSGID|(VEXEC>>3))) == VSGID)
497 extern void vn_init(void);
498 extern int vn_wait(struct vnode *);
499 extern vnode_t *vn_initialize(struct inode *);
502 * Acquiring and invalidating vnodes:
504 * if (vn_get(vp, version, 0))
506 * vn_purge(vp, version);
508 * vn_get and vn_purge must be called with vmap_t arguments, sampled
509 * while a lock that the vnode's VOP_RECLAIM function acquires is
510 * held, to ensure that the vnode sampled with the lock held isn't
511 * recycled (VOP_RECLAIMed) or deallocated between the release of the lock
512 * and the subsequent vn_get or vn_purge.
516 * vnode_map structures _must_ match vn_epoch and vnode structure sizes.
518 typedef struct vnode_map {
520 vnumber_t v_number; /* in-core vnode number */
521 xfs_ino_t v_ino; /* inode # */
524 #define VMAP(vp, vmap) {(vmap).v_vfsp = (vp)->v_vfsp, \
525 (vmap).v_number = (vp)->v_number, \
526 (vmap).v_ino = (vp)->v_inode.i_ino; }
528 extern void vn_purge(struct vnode *, vmap_t *);
529 extern vnode_t *vn_get(struct vnode *, vmap_t *);
530 extern int vn_revalidate(struct vnode *);
531 extern void vn_revalidate_core(struct vnode *, vattr_t *);
532 extern void vn_remove(struct vnode *);
534 static inline int vn_count(struct vnode *vp)
536 return atomic_read(&LINVFS_GET_IP(vp)->i_count);
540 * Vnode reference counting functions (and macros for compatibility).
542 extern vnode_t *vn_hold(struct vnode *);
543 extern void vn_rele(struct vnode *);
545 #if defined(XFS_VNODE_TRACE)
546 #define VN_HOLD(vp) \
547 ((void)vn_hold(vp), \
548 vn_trace_hold(vp, __FILE__, __LINE__, (inst_t *)__return_address))
549 #define VN_RELE(vp) \
550 (vn_trace_rele(vp, __FILE__, __LINE__, (inst_t *)__return_address), \
551 iput(LINVFS_GET_IP(vp)))
553 #define VN_HOLD(vp) ((void)vn_hold(vp))
554 #define VN_RELE(vp) (iput(LINVFS_GET_IP(vp)))
558 * Vname handling macros.
560 #define VNAME(dentry) ((char *) (dentry)->d_name.name)
561 #define VNAMELEN(dentry) ((dentry)->d_name.len)
562 #define VNAME_TO_VNODE(dentry) (LINVFS_GET_VP((dentry)->d_inode))
565 * Vnode spinlock manipulation.
567 #define VN_LOCK(vp) mutex_spinlock(&(vp)->v_lock)
568 #define VN_UNLOCK(vp, s) mutex_spinunlock(&(vp)->v_lock, s)
569 #define VN_FLAGSET(vp,b) vn_flagset(vp,b)
570 #define VN_FLAGCLR(vp,b) vn_flagclr(vp,b)
572 static __inline__ void vn_flagset(struct vnode *vp, uint flag)
574 spin_lock(&vp->v_lock);
576 spin_unlock(&vp->v_lock);
579 static __inline__ void vn_flagclr(struct vnode *vp, uint flag)
581 spin_lock(&vp->v_lock);
583 spin_unlock(&vp->v_lock);
587 * Update modify/access/change times on the vnode
589 #define VN_MTIMESET(vp, tvp) \
590 (LINVFS_GET_IP(vp)->i_mtime = (__int32_t)(tvp)->tv_sec)
591 #define VN_ATIMESET(vp, tvp) \
592 (LINVFS_GET_IP(vp)->i_atime = (__int32_t)(tvp)->tv_sec)
593 #define VN_CTIMESET(vp, tvp) \
594 (LINVFS_GET_IP(vp)->i_ctime = (__int32_t)(tvp)->tv_sec)
597 * Dealing with bad inodes
599 static inline void vn_mark_bad(struct vnode *vp)
601 struct inode *inode = LINVFS_GET_IP(vp);
603 remove_inode_hash(inode);
604 make_bad_inode(inode);
607 static inline int VN_BAD(struct vnode *vp)
609 return is_bad_inode(LINVFS_GET_IP(vp));
614 * Some useful predicates.
616 #define VN_MAPPED(vp) ((LINVFS_GET_IP(vp)->i_mapping->i_mmap != NULL) || \
617 (LINVFS_GET_IP(vp)->i_mapping->i_mmap_shared != NULL))
618 #define VN_CACHED(vp) (LINVFS_GET_IP(vp)->i_mapping->nrpages)
619 #define VN_DIRTY(vp) (!list_empty(&(LINVFS_GET_IP(vp)->i_dirty_data_buffers)))
620 #define VMODIFY(vp) VN_FLAGSET(vp, VMODIFIED)
621 #define VUNMODIFY(vp) VN_FLAGCLR(vp, VMODIFIED)
624 * Flags to VOP_SETATTR/VOP_GETATTR.
626 #define ATTR_UTIME 0x01 /* non-default utime(2) request */
627 #define ATTR_DMI 0x08 /* invocation from a DMI function */
628 #define ATTR_LAZY 0x80 /* set/get attributes lazily */
629 #define ATTR_NONBLOCK 0x100 /* return EAGAIN if operation would block */
632 * Flags to VOP_FSYNC and VOP_RECLAIM.
634 #define FSYNC_NOWAIT 0 /* asynchronous flush */
635 #define FSYNC_WAIT 0x1 /* synchronous fsync or forced reclaim */
636 #define FSYNC_INVAL 0x2 /* flush and invalidate cached data */
637 #define FSYNC_DATA 0x4 /* synchronous fsync of data only */
640 * Tracking vnode activity.
642 #if defined(XFS_VNODE_TRACE)
644 #define VNODE_TRACE_SIZE 16 /* number of trace entries */
645 #define VNODE_KTRACE_ENTRY 1
646 #define VNODE_KTRACE_EXIT 2
647 #define VNODE_KTRACE_HOLD 3
648 #define VNODE_KTRACE_REF 4
649 #define VNODE_KTRACE_RELE 5
651 extern void vn_trace_entry(struct vnode *, char *, inst_t *);
652 extern void vn_trace_exit(struct vnode *, char *, inst_t *);
653 extern void vn_trace_hold(struct vnode *, char *, int, inst_t *);
654 extern void vn_trace_ref(struct vnode *, char *, int, inst_t *);
655 extern void vn_trace_rele(struct vnode *, char *, int, inst_t *);
657 #define VN_TRACE(vp) \
658 vn_trace_ref(vp, __FILE__, __LINE__, (inst_t *)__return_address)
660 #define vn_trace_entry(a,b,c)
661 #define vn_trace_exit(a,b,c)
662 #define vn_trace_hold(a,b,c,d)
663 #define vn_trace_ref(a,b,c,d)
664 #define vn_trace_rele(a,b,c,d)
668 #endif /* __XFS_VNODE_H__ */