fs/xfs/linux-2.6/xfs_vnode.h

   1 /*
   2  * Copyright (c) 2000-2005 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   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.
   7  *
   8  * This program is distributed in the hope that it would be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * Further, this software is distributed without any warranty that it is
  13  * free of the rightful claim of any third person regarding infringement
  14  * or the like.  Any license provided herein, whether implied or
  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.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22  *
  23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  24  * Mountain View, CA  94043, or:
  25  *
  26  * http://www.sgi.com
  27  *
  28  * For further information regarding this notice, see:
  29  *
  30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  31  *
  32  * Portions Copyright (c) 1989, 1993
  33  *      The Regents of the University of California.  All rights reserved.
  34  *
  35  * Redistribution and use in source and binary forms, with or without
  36  * modification, are permitted provided that the following conditions
  37  * are met:
  38  * 1. Redistributions of source code must retain the above copyright
  39  *    notice, this list of conditions and the following disclaimer.
  40  * 2. Redistributions in binary form must reproduce the above copyright
  41  *    notice, this list of conditions and the following disclaimer in the
  42  *    documentation and/or other materials provided with the distribution.
  43  * 3. Neither the name of the University nor the names of its contributors
  44  *    may be used to endorse or promote products derived from this software
  45  *    without specific prior written permission.
  46  *
  47  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  48  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  49  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  50  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  51  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  52  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  53  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  54  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  55  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  56  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  57  * SUCH DAMAGE.
  58  */
  59 #ifndef __XFS_VNODE_H__
  60 #define __XFS_VNODE_H__
  61
  62 struct uio;
  63 struct file;
  64 struct vattr;
  65 struct xfs_iomap;
  66 struct attrlist_cursor_kern;
  67
  68
  69 typedef xfs_ino_t vnumber_t;
  70 typedef struct dentry vname_t;
  71 typedef bhv_head_t vn_bhv_head_t;
  72
  73 /*
  74  * MP locking protocols:
  75  *      v_flag, v_vfsp                          VN_LOCK/VN_UNLOCK
  76  */
  77 typedef struct vnode {
  78         __u32           v_flag;                 /* vnode flags (see below) */
  79         struct vfs      *v_vfsp;                /* ptr to containing VFS */
  80         vnumber_t       v_number;               /* in-core vnode number */
  81         vn_bhv_head_t   v_bh;                   /* behavior head */
  82         spinlock_t      v_lock;                 /* VN_LOCK/VN_UNLOCK */
  83         atomic_t        v_iocount;              /* outstanding I/O count */
  84 #ifdef XFS_VNODE_TRACE
  85         struct ktrace   *v_trace;               /* trace header structure    */
  86 #endif
  87         struct inode    v_inode;                /* Linux inode */
  88         /* inode MUST be last */
  89 } vnode_t;
  90
  91 #define VN_ISLNK(vp)    S_ISLNK((vp)->v_inode.i_mode)
  92 #define VN_ISREG(vp)    S_ISREG((vp)->v_inode.i_mode)
  93 #define VN_ISDIR(vp)    S_ISDIR((vp)->v_inode.i_mode)
  94 #define VN_ISCHR(vp)    S_ISCHR((vp)->v_inode.i_mode)
  95 #define VN_ISBLK(vp)    S_ISBLK((vp)->v_inode.i_mode)
  96
  97 #define v_fbhv                  v_bh.bh_first          /* first behavior */
  98 #define v_fops                  v_bh.bh_first->bd_ops  /* first behavior ops */
  99
 100 #define VNODE_POSITION_BASE     BHV_POSITION_BASE       /* chain bottom */
 101 #define VNODE_POSITION_TOP      BHV_POSITION_TOP        /* chain top */
 102 #define VNODE_POSITION_INVALID  BHV_POSITION_INVALID    /* invalid pos. num */
 103
 104 typedef enum {
 105         VN_BHV_UNKNOWN,         /* not specified */
 106         VN_BHV_XFS,             /* xfs */
 107         VN_BHV_DM,              /* data migration */
 108         VN_BHV_QM,              /* quota manager */
 109         VN_BHV_IO,              /* IO path */
 110         VN_BHV_END              /* housekeeping end-of-range */
 111 } vn_bhv_t;
 112
 113 #define VNODE_POSITION_XFS      (VNODE_POSITION_BASE)
 114 #define VNODE_POSITION_DM       (VNODE_POSITION_BASE+10)
 115 #define VNODE_POSITION_QM       (VNODE_POSITION_BASE+20)
 116 #define VNODE_POSITION_IO       (VNODE_POSITION_BASE+30)
 117
 118 /*
 119  * Macros for dealing with the behavior descriptor inside of the vnode.
 120  */
 121 #define BHV_TO_VNODE(bdp)       ((vnode_t *)BHV_VOBJ(bdp))
 122 #define BHV_TO_VNODE_NULL(bdp)  ((vnode_t *)BHV_VOBJNULL(bdp))
 123
 124 #define VN_BHV_HEAD(vp)                 ((bhv_head_t *)(&((vp)->v_bh)))
 125 #define vn_bhv_head_init(bhp,name)      bhv_head_init(bhp,name)
 126 #define vn_bhv_remove(bhp,bdp)          bhv_remove(bhp,bdp)
 127 #define vn_bhv_lookup(bhp,ops)          bhv_lookup(bhp,ops)
 128 #define vn_bhv_lookup_unlocked(bhp,ops) bhv_lookup_unlocked(bhp,ops)
 129
 130 /*
 131  * Vnode to Linux inode mapping.
 132  */
 133 #define LINVFS_GET_VP(inode)    ((vnode_t *)list_entry(inode, vnode_t, v_inode))
 134 #define LINVFS_GET_IP(vp)       (&(vp)->v_inode)
 135
 136 /*
 137  * Vnode flags.
 138  */
 139 #define VMODIFIED              0x8      /* XFS inode state possibly differs */
 140                                         /* to the Linux inode state.    */
 141
 142 /*
 143  * Values for the VOP_RWLOCK and VOP_RWUNLOCK flags parameter.
 144  */
 145 typedef enum vrwlock {
 146         VRWLOCK_NONE,
 147         VRWLOCK_READ,
 148         VRWLOCK_WRITE,
 149         VRWLOCK_WRITE_DIRECT,
 150         VRWLOCK_TRY_READ,
 151         VRWLOCK_TRY_WRITE
 152 } vrwlock_t;
 153
 154 /*
 155  * Return values for VOP_INACTIVE.  A return value of
 156  * VN_INACTIVE_NOCACHE implies that the file system behavior
 157  * has disassociated its state and bhv_desc_t from the vnode.
 158  */
 159 #define VN_INACTIVE_CACHE       0
 160 #define VN_INACTIVE_NOCACHE     1
 161
 162 /*
 163  * Values for the cmd code given to VOP_VNODE_CHANGE.
 164  */
 165 typedef enum vchange {
 166         VCHANGE_FLAGS_FRLOCKS           = 0,
 167         VCHANGE_FLAGS_ENF_LOCKING       = 1,
 168         VCHANGE_FLAGS_TRUNCATED         = 2,
 169         VCHANGE_FLAGS_PAGE_DIRTY        = 3,
 170         VCHANGE_FLAGS_IOEXCL_COUNT      = 4
 171 } vchange_t;
 172
 173
 174 typedef int     (*vop_open_t)(bhv_desc_t *, struct cred *);
 175 typedef ssize_t (*vop_read_t)(bhv_desc_t *, struct kiocb *,
 176                                 const struct iovec *, unsigned int,
 177                                 loff_t *, int, struct cred *);
 178 typedef ssize_t (*vop_write_t)(bhv_desc_t *, struct kiocb *,
 179                                 const struct iovec *, unsigned int,
 180                                 loff_t *, int, struct cred *);
 181 typedef ssize_t (*vop_sendfile_t)(bhv_desc_t *, struct file *,
 182                                 loff_t *, int, size_t, read_actor_t,
 183                                 void *, struct cred *);
 184 typedef int     (*vop_ioctl_t)(bhv_desc_t *, struct inode *, struct file *,
 185                                 int, unsigned int, void __user *);
 186 typedef int     (*vop_getattr_t)(bhv_desc_t *, struct vattr *, int,
 187                                 struct cred *);
 188 typedef int     (*vop_setattr_t)(bhv_desc_t *, struct vattr *, int,
 189                                 struct cred *);
 190 typedef int     (*vop_access_t)(bhv_desc_t *, int, struct cred *);
 191 typedef int     (*vop_lookup_t)(bhv_desc_t *, vname_t *, vnode_t **,
 192                                 int, vnode_t *, struct cred *);
 193 typedef int     (*vop_create_t)(bhv_desc_t *, vname_t *, struct vattr *,
 194                                 vnode_t **, struct cred *);
 195 typedef int     (*vop_remove_t)(bhv_desc_t *, vname_t *, struct cred *);
 196 typedef int     (*vop_link_t)(bhv_desc_t *, vnode_t *, vname_t *,
 197                                 struct cred *);
 198 typedef int     (*vop_rename_t)(bhv_desc_t *, vname_t *, vnode_t *, vname_t *,
 199                                 struct cred *);
 200 typedef int     (*vop_mkdir_t)(bhv_desc_t *, vname_t *, struct vattr *,
 201                                 vnode_t **, struct cred *);
 202 typedef int     (*vop_rmdir_t)(bhv_desc_t *, vname_t *, struct cred *);
 203 typedef int     (*vop_readdir_t)(bhv_desc_t *, struct uio *, struct cred *,
 204                                 int *);
 205 typedef int     (*vop_symlink_t)(bhv_desc_t *, vname_t *, struct vattr *,
 206                                 char *, vnode_t **, struct cred *);
 207 typedef int     (*vop_readlink_t)(bhv_desc_t *, struct uio *, int,
 208                                 struct cred *);
 209 typedef int     (*vop_fsync_t)(bhv_desc_t *, int, struct cred *,
 210                                 xfs_off_t, xfs_off_t);
 211 typedef int     (*vop_inactive_t)(bhv_desc_t *, struct cred *);
 212 typedef int     (*vop_fid2_t)(bhv_desc_t *, struct fid *);
 213 typedef int     (*vop_release_t)(bhv_desc_t *);
 214 typedef int     (*vop_rwlock_t)(bhv_desc_t *, vrwlock_t);
 215 typedef void    (*vop_rwunlock_t)(bhv_desc_t *, vrwlock_t);
 216 typedef int     (*vop_bmap_t)(bhv_desc_t *, xfs_off_t, ssize_t, int,
 217                                 struct xfs_iomap *, int *);
 218 typedef int     (*vop_reclaim_t)(bhv_desc_t *);
 219 typedef int     (*vop_attr_get_t)(bhv_desc_t *, const char *, char *, int *,
 220                                 int, struct cred *);
 221 typedef int     (*vop_attr_set_t)(bhv_desc_t *, const char *, char *, int,
 222                                 int, struct cred *);
 223 typedef int     (*vop_attr_remove_t)(bhv_desc_t *, const char *,
 224                                 int, struct cred *);
 225 typedef int     (*vop_attr_list_t)(bhv_desc_t *, char *, int, int,
 226                                 struct attrlist_cursor_kern *, struct cred *);
 227 typedef void    (*vop_link_removed_t)(bhv_desc_t *, vnode_t *, int);
 228 typedef void    (*vop_vnode_change_t)(bhv_desc_t *, vchange_t, __psint_t);
 229 typedef void    (*vop_ptossvp_t)(bhv_desc_t *, xfs_off_t, xfs_off_t, int);
 230 typedef void    (*vop_pflushinvalvp_t)(bhv_desc_t *, xfs_off_t, xfs_off_t, int);
 231 typedef int     (*vop_pflushvp_t)(bhv_desc_t *, xfs_off_t, xfs_off_t,
 232                                 uint64_t, int);
 233 typedef int     (*vop_iflush_t)(bhv_desc_t *, int);
 234
 235
 236 typedef struct vnodeops {
 237         bhv_position_t  vn_position;    /* position within behavior chain */
 238         vop_open_t              vop_open;
 239         vop_read_t              vop_read;
 240         vop_write_t             vop_write;
 241         vop_sendfile_t          vop_sendfile;
 242         vop_ioctl_t             vop_ioctl;
 243         vop_getattr_t           vop_getattr;
 244         vop_setattr_t           vop_setattr;
 245         vop_access_t            vop_access;
 246         vop_lookup_t            vop_lookup;
 247         vop_create_t            vop_create;
 248         vop_remove_t            vop_remove;
 249         vop_link_t              vop_link;
 250         vop_rename_t            vop_rename;
 251         vop_mkdir_t             vop_mkdir;
 252         vop_rmdir_t             vop_rmdir;
 253         vop_readdir_t           vop_readdir;
 254         vop_symlink_t           vop_symlink;
 255         vop_readlink_t          vop_readlink;
 256         vop_fsync_t             vop_fsync;
 257         vop_inactive_t          vop_inactive;
 258         vop_fid2_t              vop_fid2;
 259         vop_rwlock_t            vop_rwlock;
 260         vop_rwunlock_t          vop_rwunlock;
 261         vop_bmap_t              vop_bmap;
 262         vop_reclaim_t           vop_reclaim;
 263         vop_attr_get_t          vop_attr_get;
 264         vop_attr_set_t          vop_attr_set;
 265         vop_attr_remove_t       vop_attr_remove;
 266         vop_attr_list_t         vop_attr_list;
 267         vop_link_removed_t      vop_link_removed;
 268         vop_vnode_change_t      vop_vnode_change;
 269         vop_ptossvp_t           vop_tosspages;
 270         vop_pflushinvalvp_t     vop_flushinval_pages;
 271         vop_pflushvp_t          vop_flush_pages;
 272         vop_release_t           vop_release;
 273         vop_iflush_t            vop_iflush;
 274 } vnodeops_t;
 275
 276 /*
 277  * VOP's.
 278  */
 279 #define _VOP_(op, vp)   (*((vnodeops_t *)(vp)->v_fops)->op)
 280
 281 #define VOP_READ(vp,file,iov,segs,offset,ioflags,cr,rv)                 \
 282         rv = _VOP_(vop_read, vp)((vp)->v_fbhv,file,iov,segs,offset,ioflags,cr)
 283 #define VOP_WRITE(vp,file,iov,segs,offset,ioflags,cr,rv)                \
 284         rv = _VOP_(vop_write, vp)((vp)->v_fbhv,file,iov,segs,offset,ioflags,cr)
 285 #define VOP_SENDFILE(vp,f,off,ioflags,cnt,act,targ,cr,rv)               \
 286         rv = _VOP_(vop_sendfile, vp)((vp)->v_fbhv,f,off,ioflags,cnt,act,targ,cr)
 287 #define VOP_BMAP(vp,of,sz,rw,b,n,rv)                                    \
 288         rv = _VOP_(vop_bmap, vp)((vp)->v_fbhv,of,sz,rw,b,n)
 289 #define VOP_OPEN(vp, cr, rv)                                            \
 290         rv = _VOP_(vop_open, vp)((vp)->v_fbhv, cr)
 291 #define VOP_GETATTR(vp, vap, f, cr, rv)                                 \
 292         rv = _VOP_(vop_getattr, vp)((vp)->v_fbhv, vap, f, cr)
 293 #define VOP_SETATTR(vp, vap, f, cr, rv)                                 \
 294         rv = _VOP_(vop_setattr, vp)((vp)->v_fbhv, vap, f, cr)
 295 #define VOP_ACCESS(vp, mode, cr, rv)                                    \
 296         rv = _VOP_(vop_access, vp)((vp)->v_fbhv, mode, cr)
 297 #define VOP_LOOKUP(vp,d,vpp,f,rdir,cr,rv)                               \
 298         rv = _VOP_(vop_lookup, vp)((vp)->v_fbhv,d,vpp,f,rdir,cr)
 299 #define VOP_CREATE(dvp,d,vap,vpp,cr,rv)                                 \
 300         rv = _VOP_(vop_create, dvp)((dvp)->v_fbhv,d,vap,vpp,cr)
 301 #define VOP_REMOVE(dvp,d,cr,rv)                                         \
 302         rv = _VOP_(vop_remove, dvp)((dvp)->v_fbhv,d,cr)
 303 #define VOP_LINK(tdvp,fvp,d,cr,rv)                                      \
 304         rv = _VOP_(vop_link, tdvp)((tdvp)->v_fbhv,fvp,d,cr)
 305 #define VOP_RENAME(fvp,fnm,tdvp,tnm,cr,rv)                              \
 306         rv = _VOP_(vop_rename, fvp)((fvp)->v_fbhv,fnm,tdvp,tnm,cr)
 307 #define VOP_MKDIR(dp,d,vap,vpp,cr,rv)                                   \
 308         rv = _VOP_(vop_mkdir, dp)((dp)->v_fbhv,d,vap,vpp,cr)
 309 #define VOP_RMDIR(dp,d,cr,rv)                                           \
 310         rv = _VOP_(vop_rmdir, dp)((dp)->v_fbhv,d,cr)
 311 #define VOP_READDIR(vp,uiop,cr,eofp,rv)                                 \
 312         rv = _VOP_(vop_readdir, vp)((vp)->v_fbhv,uiop,cr,eofp)
 313 #define VOP_SYMLINK(dvp,d,vap,tnm,vpp,cr,rv)                            \
 314         rv = _VOP_(vop_symlink, dvp) ((dvp)->v_fbhv,d,vap,tnm,vpp,cr)
 315 #define VOP_READLINK(vp,uiop,fl,cr,rv)                                  \
 316         rv = _VOP_(vop_readlink, vp)((vp)->v_fbhv,uiop,fl,cr)
 317 #define VOP_FSYNC(vp,f,cr,b,e,rv)                                       \
 318         rv = _VOP_(vop_fsync, vp)((vp)->v_fbhv,f,cr,b,e)
 319 #define VOP_INACTIVE(vp, cr, rv)                                        \
 320         rv = _VOP_(vop_inactive, vp)((vp)->v_fbhv, cr)
 321 #define VOP_RELEASE(vp, rv)                                             \
 322         rv = _VOP_(vop_release, vp)((vp)->v_fbhv)
 323 #define VOP_FID2(vp, fidp, rv)                                          \
 324         rv = _VOP_(vop_fid2, vp)((vp)->v_fbhv, fidp)
 325 #define VOP_RWLOCK(vp,i)                                                \
 326         (void)_VOP_(vop_rwlock, vp)((vp)->v_fbhv, i)
 327 #define VOP_RWLOCK_TRY(vp,i)                                            \
 328         _VOP_(vop_rwlock, vp)((vp)->v_fbhv, i)
 329 #define VOP_RWUNLOCK(vp,i)                                              \
 330         (void)_VOP_(vop_rwunlock, vp)((vp)->v_fbhv, i)
 331 #define VOP_FRLOCK(vp,c,fl,flags,offset,fr,rv)                          \
 332         rv = _VOP_(vop_frlock, vp)((vp)->v_fbhv,c,fl,flags,offset,fr)
 333 #define VOP_RECLAIM(vp, rv)                                             \
 334         rv = _VOP_(vop_reclaim, vp)((vp)->v_fbhv)
 335 #define VOP_ATTR_GET(vp, name, val, vallenp, fl, cred, rv)              \
 336         rv = _VOP_(vop_attr_get, vp)((vp)->v_fbhv,name,val,vallenp,fl,cred)
 337 #define VOP_ATTR_SET(vp, name, val, vallen, fl, cred, rv)               \
 338         rv = _VOP_(vop_attr_set, vp)((vp)->v_fbhv,name,val,vallen,fl,cred)
 339 #define VOP_ATTR_REMOVE(vp, name, flags, cred, rv)                      \
 340         rv = _VOP_(vop_attr_remove, vp)((vp)->v_fbhv,name,flags,cred)
 341 #define VOP_ATTR_LIST(vp, buf, buflen, fl, cursor, cred, rv)            \
 342         rv = _VOP_(vop_attr_list, vp)((vp)->v_fbhv,buf,buflen,fl,cursor,cred)
 343 #define VOP_LINK_REMOVED(vp, dvp, linkzero)                             \
 344         (void)_VOP_(vop_link_removed, vp)((vp)->v_fbhv, dvp, linkzero)
 345 #define VOP_VNODE_CHANGE(vp, cmd, val)                                  \
 346         (void)_VOP_(vop_vnode_change, vp)((vp)->v_fbhv,cmd,val)
 347 /*
 348  * These are page cache functions that now go thru VOPs.
 349  * 'last' parameter is unused and left in for IRIX compatibility
 350  */
 351 #define VOP_TOSS_PAGES(vp, first, last, fiopt)                          \
 352         _VOP_(vop_tosspages, vp)((vp)->v_fbhv,first, last, fiopt)
 353 /*
 354  * 'last' parameter is unused and left in for IRIX compatibility
 355  */
 356 #define VOP_FLUSHINVAL_PAGES(vp, first, last, fiopt)                    \
 357         _VOP_(vop_flushinval_pages, vp)((vp)->v_fbhv,first,last,fiopt)
 358 /*
 359  * 'last' parameter is unused and left in for IRIX compatibility
 360  */
 361 #define VOP_FLUSH_PAGES(vp, first, last, flags, fiopt, rv)              \
 362         rv = _VOP_(vop_flush_pages, vp)((vp)->v_fbhv,first,last,flags,fiopt)
 363 #define VOP_IOCTL(vp, inode, filp, fl, cmd, arg, rv)                    \
 364         rv = _VOP_(vop_ioctl, vp)((vp)->v_fbhv,inode,filp,fl,cmd,arg)
 365 #define VOP_IFLUSH(vp, flags, rv)                                       \
 366         rv = _VOP_(vop_iflush, vp)((vp)->v_fbhv, flags)
 367
 368 /*
 369  * Flags for read/write calls - same values as IRIX
 370  */
 371 #define IO_ISAIO        0x00001         /* don't wait for completion */
 372 #define IO_ISDIRECT     0x00004         /* bypass page cache */
 373 #define IO_INVIS        0x00020         /* don't update inode timestamps */
 374
 375 /*
 376  * Flags for VOP_IFLUSH call
 377  */
 378 #define FLUSH_SYNC              1       /* wait for flush to complete   */
 379 #define FLUSH_INODE             2       /* flush the inode itself       */
 380 #define FLUSH_LOG               4       /* force the last log entry for
 381                                          * this inode out to disk       */
 382
 383 /*
 384  * Flush/Invalidate options for VOP_TOSS_PAGES, VOP_FLUSHINVAL_PAGES and
 385  *      VOP_FLUSH_PAGES.
 386  */
 387 #define FI_NONE                 0       /* none */
 388 #define FI_REMAPF               1       /* Do a remapf prior to the operation */
 389 #define FI_REMAPF_LOCKED        2       /* Do a remapf prior to the operation.
 390                                            Prevent VM access to the pages until
 391                                            the operation completes. */
 392
 393 /*
 394  * Vnode attributes.  va_mask indicates those attributes the caller
 395  * wants to set or extract.
 396  */
 397 typedef struct vattr {
 398         int             va_mask;        /* bit-mask of attributes present */
 399         mode_t          va_mode;        /* file access mode and type */
 400         xfs_nlink_t     va_nlink;       /* number of references to file */
 401         uid_t           va_uid;         /* owner user id */
 402         gid_t           va_gid;         /* owner group id */
 403         xfs_ino_t       va_nodeid;      /* file id */
 404         xfs_off_t       va_size;        /* file size in bytes */
 405         u_long          va_blocksize;   /* blocksize preferred for i/o */
 406         struct timespec va_atime;       /* time of last access */
 407         struct timespec va_mtime;       /* time of last modification */
 408         struct timespec va_ctime;       /* time file changed */
 409         u_int           va_gen;         /* generation number of file */
 410         xfs_dev_t       va_rdev;        /* device the special file represents */
 411         __int64_t       va_nblocks;     /* number of blocks allocated */
 412         u_long          va_xflags;      /* random extended file flags */
 413         u_long          va_extsize;     /* file extent size */
 414         u_long          va_nextents;    /* number of extents in file */
 415         u_long          va_anextents;   /* number of attr extents in file */
 416         prid_t          va_projid;      /* project id */
 417 } vattr_t;
 418
 419 /*
 420  * setattr or getattr attributes
 421  */
 422 #define XFS_AT_TYPE             0x00000001
 423 #define XFS_AT_MODE             0x00000002
 424 #define XFS_AT_UID              0x00000004
 425 #define XFS_AT_GID              0x00000008
 426 #define XFS_AT_FSID             0x00000010
 427 #define XFS_AT_NODEID           0x00000020
 428 #define XFS_AT_NLINK            0x00000040
 429 #define XFS_AT_SIZE             0x00000080
 430 #define XFS_AT_ATIME            0x00000100
 431 #define XFS_AT_MTIME            0x00000200
 432 #define XFS_AT_CTIME            0x00000400
 433 #define XFS_AT_RDEV             0x00000800
 434 #define XFS_AT_BLKSIZE          0x00001000
 435 #define XFS_AT_NBLOCKS          0x00002000
 436 #define XFS_AT_VCODE            0x00004000
 437 #define XFS_AT_MAC              0x00008000
 438 #define XFS_AT_UPDATIME         0x00010000
 439 #define XFS_AT_UPDMTIME         0x00020000
 440 #define XFS_AT_UPDCTIME         0x00040000
 441 #define XFS_AT_ACL              0x00080000
 442 #define XFS_AT_CAP              0x00100000
 443 #define XFS_AT_INF              0x00200000
 444 #define XFS_AT_XFLAGS           0x00400000
 445 #define XFS_AT_EXTSIZE          0x00800000
 446 #define XFS_AT_NEXTENTS         0x01000000
 447 #define XFS_AT_ANEXTENTS        0x02000000
 448 #define XFS_AT_PROJID           0x04000000
 449 #define XFS_AT_SIZE_NOPERM      0x08000000
 450 #define XFS_AT_GENCOUNT         0x10000000
 451
 452 #define XFS_AT_ALL      (XFS_AT_TYPE|XFS_AT_MODE|XFS_AT_UID|XFS_AT_GID|\
 453                 XFS_AT_FSID|XFS_AT_NODEID|XFS_AT_NLINK|XFS_AT_SIZE|\
 454                 XFS_AT_ATIME|XFS_AT_MTIME|XFS_AT_CTIME|XFS_AT_RDEV|\
 455                 XFS_AT_BLKSIZE|XFS_AT_NBLOCKS|XFS_AT_VCODE|XFS_AT_MAC|\
 456                 XFS_AT_ACL|XFS_AT_CAP|XFS_AT_INF|XFS_AT_XFLAGS|XFS_AT_EXTSIZE|\
 457                 XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|XFS_AT_PROJID|XFS_AT_GENCOUNT)
 458
 459 #define XFS_AT_STAT     (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_PROJID)
 463
 464 #define XFS_AT_TIMES    (XFS_AT_ATIME|XFS_AT_MTIME|XFS_AT_CTIME)
 465
 466 #define XFS_AT_UPDTIMES (XFS_AT_UPDATIME|XFS_AT_UPDMTIME|XFS_AT_UPDCTIME)
 467
 468 #define XFS_AT_NOSET    (XFS_AT_NLINK|XFS_AT_RDEV|XFS_AT_FSID|XFS_AT_NODEID|\
 469                 XFS_AT_TYPE|XFS_AT_BLKSIZE|XFS_AT_NBLOCKS|XFS_AT_VCODE|\
 470                 XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|XFS_AT_GENCOUNT)
 471
 472 /*
 473  *  Modes.
 474  */
 475 #define VSUID   S_ISUID         /* set user id on execution */
 476 #define VSGID   S_ISGID         /* set group id on execution */
 477 #define VSVTX   S_ISVTX         /* save swapped text even after use */
 478 #define VREAD   S_IRUSR         /* read, write, execute permissions */
 479 #define VWRITE  S_IWUSR
 480 #define VEXEC   S_IXUSR
 481
 482 #define MODEMASK S_IALLUGO      /* mode bits plus permission bits */
 483
 484 /*
 485  * Check whether mandatory file locking is enabled.
 486  */
 487 #define MANDLOCK(vp, mode)      \
 488         (VN_ISREG(vp) && ((mode) & (VSGID|(VEXEC>>3))) == VSGID)
 489
 490 extern void     vn_init(void);
 491 extern vnode_t  *vn_initialize(struct inode *);
 492
 493 /*
 494  * vnode_map structures _must_ match vn_epoch and vnode structure sizes.
 495  */
 496 typedef struct vnode_map {
 497         vfs_t           *v_vfsp;
 498         vnumber_t       v_number;               /* in-core vnode number */
 499         xfs_ino_t       v_ino;                  /* inode #      */
 500 } vmap_t;
 501
 502 #define VMAP(vp, vmap)  {(vmap).v_vfsp   = (vp)->v_vfsp,        \
 503                          (vmap).v_number = (vp)->v_number,      \
 504                          (vmap).v_ino    = (vp)->v_inode.i_ino; }
 505
 506 extern int      vn_revalidate(struct vnode *);
 507 extern void     vn_revalidate_core(struct vnode *, vattr_t *);
 508
 509 extern void     vn_iowait(struct vnode *vp);
 510 extern void     vn_iowake(struct vnode *vp);
 511
 512 static inline int vn_count(struct vnode *vp)
 513 {
 514         return atomic_read(&LINVFS_GET_IP(vp)->i_count);
 515 }
 516
 517 /*
 518  * Vnode reference counting functions (and macros for compatibility).
 519  */
 520 extern vnode_t  *vn_hold(struct vnode *);
 521
 522 #if defined(XFS_VNODE_TRACE)
 523 #define VN_HOLD(vp)             \
 524         ((void)vn_hold(vp),     \
 525           vn_trace_hold(vp, __FILE__, __LINE__, (inst_t *)__return_address))
 526 #define VN_RELE(vp)             \
 527           (vn_trace_rele(vp, __FILE__, __LINE__, (inst_t *)__return_address), \
 528            iput(LINVFS_GET_IP(vp)))
 529 #else
 530 #define VN_HOLD(vp)             ((void)vn_hold(vp))
 531 #define VN_RELE(vp)             (iput(LINVFS_GET_IP(vp)))
 532 #endif
 533
 534 static inline struct vnode *vn_grab(struct vnode *vp)
 535 {
 536         struct inode *inode = igrab(LINVFS_GET_IP(vp));
 537         return inode ? LINVFS_GET_VP(inode) : NULL;
 538 }
 539
 540 /*
 541  * Vname handling macros.
 542  */
 543 #define VNAME(dentry)           ((char *) (dentry)->d_name.name)
 544 #define VNAMELEN(dentry)        ((dentry)->d_name.len)
 545 #define VNAME_TO_VNODE(dentry)  (LINVFS_GET_VP((dentry)->d_inode))
 546
 547 /*
 548  * Vnode spinlock manipulation.
 549  */
 550 #define VN_LOCK(vp)             mutex_spinlock(&(vp)->v_lock)
 551 #define VN_UNLOCK(vp, s)        mutex_spinunlock(&(vp)->v_lock, s)
 552 #define VN_FLAGSET(vp,b)        vn_flagset(vp,b)
 553 #define VN_FLAGCLR(vp,b)        vn_flagclr(vp,b)
 554
 555 static __inline__ void vn_flagset(struct vnode *vp, uint flag)
 556 {
 557         spin_lock(&vp->v_lock);
 558         vp->v_flag |= flag;
 559         spin_unlock(&vp->v_lock);
 560 }
 561
 562 static __inline__ void vn_flagclr(struct vnode *vp, uint flag)
 563 {
 564         spin_lock(&vp->v_lock);
 565         vp->v_flag &= ~flag;
 566         spin_unlock(&vp->v_lock);
 567 }
 568
 569 /*
 570  * Dealing with bad inodes
 571  */
 572 static inline void vn_mark_bad(struct vnode *vp)
 573 {
 574         make_bad_inode(LINVFS_GET_IP(vp));
 575 }
 576
 577 static inline int VN_BAD(struct vnode *vp)
 578 {
 579         return is_bad_inode(LINVFS_GET_IP(vp));
 580 }
 581
 582 /*
 583  * Some useful predicates.
 584  */
 585 #define VN_MAPPED(vp)   mapping_mapped(LINVFS_GET_IP(vp)->i_mapping)
 586 #define VN_CACHED(vp)   (LINVFS_GET_IP(vp)->i_mapping->nrpages)
 587 #define VN_DIRTY(vp)    mapping_tagged(LINVFS_GET_IP(vp)->i_mapping, \
 588                                         PAGECACHE_TAG_DIRTY)
 589 #define VMODIFY(vp)     VN_FLAGSET(vp, VMODIFIED)
 590 #define VUNMODIFY(vp)   VN_FLAGCLR(vp, VMODIFIED)
 591
 592 /*
 593  * Flags to VOP_SETATTR/VOP_GETATTR.
 594  */
 595 #define ATTR_UTIME      0x01    /* non-default utime(2) request */
 596 #define ATTR_DMI        0x08    /* invocation from a DMI function */
 597 #define ATTR_LAZY       0x80    /* set/get attributes lazily */
 598 #define ATTR_NONBLOCK   0x100   /* return EAGAIN if operation would block */
 599 #define ATTR_NOLOCK     0x200   /* Don't grab any conflicting locks */
 600
 601 /*
 602  * Flags to VOP_FSYNC and VOP_RECLAIM.
 603  */
 604 #define FSYNC_NOWAIT    0       /* asynchronous flush */
 605 #define FSYNC_WAIT      0x1     /* synchronous fsync or forced reclaim */
 606 #define FSYNC_INVAL     0x2     /* flush and invalidate cached data */
 607 #define FSYNC_DATA      0x4     /* synchronous fsync of data only */
 608
 609 /*
 610  * Tracking vnode activity.
 611  */
 612 #if defined(XFS_VNODE_TRACE)
 613
 614 #define VNODE_TRACE_SIZE        16              /* number of trace entries */
 615 #define VNODE_KTRACE_ENTRY      1
 616 #define VNODE_KTRACE_EXIT       2
 617 #define VNODE_KTRACE_HOLD       3
 618 #define VNODE_KTRACE_REF        4
 619 #define VNODE_KTRACE_RELE       5
 620
 621 extern void vn_trace_entry(struct vnode *, const char *, inst_t *);
 622 extern void vn_trace_exit(struct vnode *, const char *, inst_t *);
 623 extern void vn_trace_hold(struct vnode *, char *, int, inst_t *);
 624 extern void vn_trace_ref(struct vnode *, char *, int, inst_t *);
 625 extern void vn_trace_rele(struct vnode *, char *, int, inst_t *);
 626
 627 #define VN_TRACE(vp)            \
 628         vn_trace_ref(vp, __FILE__, __LINE__, (inst_t *)__return_address)
 629 #else
 630 #define vn_trace_entry(a,b,c)
 631 #define vn_trace_exit(a,b,c)
 632 #define vn_trace_hold(a,b,c,d)
 633 #define vn_trace_ref(a,b,c,d)
 634 #define vn_trace_rele(a,b,c,d)
 635 #define VN_TRACE(vp)
 636 #endif
 637
 638 #endif  /* __XFS_VNODE_H__ */