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   1 /*
   2  *  linux/fs/9p/vfs_inode.c
   3  *
   4  * This file contains vfs inode ops for the 9P2000 protocol.
   5  *
   6  *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
   7  *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to:
  21  *  Free Software Foundation
  22  *  51 Franklin Street, Fifth Floor
  23  *  Boston, MA  02111-1301  USA
  24  *
  25  */
  26
  27 #include <linux/module.h>
  28 #include <linux/errno.h>
  29 #include <linux/fs.h>
  30 #include <linux/file.h>
  31 #include <linux/pagemap.h>
  32 #include <linux/stat.h>
  33 #include <linux/string.h>
  34 #include <linux/smp_lock.h>
  35 #include <linux/inet.h>
  36 #include <linux/namei.h>
  37 #include <linux/idr.h>
  38
  39 #include "debug.h"
  40 #include "v9fs.h"
  41 #include "9p.h"
  42 #include "v9fs_vfs.h"
  43 #include "conv.h"
  44 #include "fid.h"
  45
  46 static struct inode_operations v9fs_dir_inode_operations;
  47 static struct inode_operations v9fs_dir_inode_operations_ext;
  48 static struct inode_operations v9fs_file_inode_operations;
  49 static struct inode_operations v9fs_symlink_inode_operations;
  50
  51 /**
  52  * unixmode2p9mode - convert unix mode bits to plan 9
  53  * @v9ses: v9fs session information
  54  * @mode: mode to convert
  55  *
  56  */
  57
  58 static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
  59 {
  60         int res;
  61         res = mode & 0777;
  62         if (S_ISDIR(mode))
  63                 res |= V9FS_DMDIR;
  64         if (v9ses->extended) {
  65                 if (S_ISLNK(mode))
  66                         res |= V9FS_DMSYMLINK;
  67                 if (v9ses->nodev == 0) {
  68                         if (S_ISSOCK(mode))
  69                                 res |= V9FS_DMSOCKET;
  70                         if (S_ISFIFO(mode))
  71                                 res |= V9FS_DMNAMEDPIPE;
  72                         if (S_ISBLK(mode))
  73                                 res |= V9FS_DMDEVICE;
  74                         if (S_ISCHR(mode))
  75                                 res |= V9FS_DMDEVICE;
  76                 }
  77
  78                 if ((mode & S_ISUID) == S_ISUID)
  79                         res |= V9FS_DMSETUID;
  80                 if ((mode & S_ISGID) == S_ISGID)
  81                         res |= V9FS_DMSETGID;
  82                 if ((mode & V9FS_DMLINK))
  83                         res |= V9FS_DMLINK;
  84         }
  85
  86         return res;
  87 }
  88
  89 /**
  90  * p9mode2unixmode- convert plan9 mode bits to unix mode bits
  91  * @v9ses: v9fs session information
  92  * @mode: mode to convert
  93  *
  94  */
  95
  96 static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
  97 {
  98         int res;
  99
 100         res = mode & 0777;
 101
 102         if ((mode & V9FS_DMDIR) == V9FS_DMDIR)
 103                 res |= S_IFDIR;
 104         else if ((mode & V9FS_DMSYMLINK) && (v9ses->extended))
 105                 res |= S_IFLNK;
 106         else if ((mode & V9FS_DMSOCKET) && (v9ses->extended)
 107                  && (v9ses->nodev == 0))
 108                 res |= S_IFSOCK;
 109         else if ((mode & V9FS_DMNAMEDPIPE) && (v9ses->extended)
 110                  && (v9ses->nodev == 0))
 111                 res |= S_IFIFO;
 112         else if ((mode & V9FS_DMDEVICE) && (v9ses->extended)
 113                  && (v9ses->nodev == 0))
 114                 res |= S_IFBLK;
 115         else
 116                 res |= S_IFREG;
 117
 118         if (v9ses->extended) {
 119                 if ((mode & V9FS_DMSETUID) == V9FS_DMSETUID)
 120                         res |= S_ISUID;
 121
 122                 if ((mode & V9FS_DMSETGID) == V9FS_DMSETGID)
 123                         res |= S_ISGID;
 124         }
 125
 126         return res;
 127 }
 128
 129 /**
 130  * v9fs_blank_mistat - helper function to setup a 9P stat structure
 131  * @v9ses: 9P session info (for determining extended mode)
 132  * @mistat: structure to initialize
 133  *
 134  */
 135
 136 static void
 137 v9fs_blank_mistat(struct v9fs_session_info *v9ses, struct v9fs_stat *mistat)
 138 {
 139         mistat->type = ~0;
 140         mistat->dev = ~0;
 141         mistat->qid.type = ~0;
 142         mistat->qid.version = ~0;
 143         *((long long *)&mistat->qid.path) = ~0;
 144         mistat->mode = ~0;
 145         mistat->atime = ~0;
 146         mistat->mtime = ~0;
 147         mistat->length = ~0;
 148         mistat->name = mistat->data;
 149         mistat->uid = mistat->data;
 150         mistat->gid = mistat->data;
 151         mistat->muid = mistat->data;
 152         if (v9ses->extended) {
 153                 mistat->n_uid = ~0;
 154                 mistat->n_gid = ~0;
 155                 mistat->n_muid = ~0;
 156                 mistat->extension = mistat->data;
 157         }
 158         *mistat->data = 0;
 159 }
 160
 161 /**
 162  * v9fs_mistat2unix - convert mistat to unix stat
 163  * @mistat: Plan 9 metadata (mistat) structure
 164  * @buf: unix metadata (stat) structure to populate
 165  * @sb: superblock
 166  *
 167  */
 168
 169 static void
 170 v9fs_mistat2unix(struct v9fs_stat *mistat, struct stat *buf,
 171                  struct super_block *sb)
 172 {
 173         struct v9fs_session_info *v9ses = sb ? sb->s_fs_info : NULL;
 174
 175         buf->st_nlink = 1;
 176
 177         buf->st_atime = mistat->atime;
 178         buf->st_mtime = mistat->mtime;
 179         buf->st_ctime = mistat->mtime;
 180
 181         buf->st_uid = (unsigned short)-1;
 182         buf->st_gid = (unsigned short)-1;
 183
 184         if (v9ses && v9ses->extended) {
 185                 /* TODO: string to uid mapping via user-space daemon */
 186                 if (mistat->n_uid != -1)
 187                         sscanf(mistat->uid, "%x", (unsigned int *)&buf->st_uid);
 188
 189                 if (mistat->n_gid != -1)
 190                         sscanf(mistat->gid, "%x", (unsigned int *)&buf->st_gid);
 191         }
 192
 193         if (buf->st_uid == (unsigned short)-1)
 194                 buf->st_uid = v9ses->uid;
 195         if (buf->st_gid == (unsigned short)-1)
 196                 buf->st_gid = v9ses->gid;
 197
 198         buf->st_mode = p9mode2unixmode(v9ses, mistat->mode);
 199         if ((S_ISBLK(buf->st_mode)) || (S_ISCHR(buf->st_mode))) {
 200                 char type = 0;
 201                 int major = -1;
 202                 int minor = -1;
 203                 sscanf(mistat->extension, "%c %u %u", &type, &major, &minor);
 204                 switch (type) {
 205                 case 'c':
 206                         buf->st_mode &= ~S_IFBLK;
 207                         buf->st_mode |= S_IFCHR;
 208                         break;
 209                 case 'b':
 210                         break;
 211                 default:
 212                         dprintk(DEBUG_ERROR, "Unknown special type %c (%s)\n",
 213                                 type, mistat->extension);
 214                 };
 215                 buf->st_rdev = MKDEV(major, minor);
 216         } else
 217                 buf->st_rdev = 0;
 218
 219         buf->st_size = mistat->length;
 220
 221         buf->st_blksize = sb->s_blocksize;
 222         buf->st_blocks =
 223             (buf->st_size + buf->st_blksize - 1) >> sb->s_blocksize_bits;
 224 }
 225
 226 /**
 227  * v9fs_get_inode - helper function to setup an inode
 228  * @sb: superblock
 229  * @mode: mode to setup inode with
 230  *
 231  */
 232
 233 struct inode *v9fs_get_inode(struct super_block *sb, int mode)
 234 {
 235         struct inode *inode = NULL;
 236         struct v9fs_session_info *v9ses = sb->s_fs_info;
 237
 238         dprintk(DEBUG_VFS, "super block: %p mode: %o\n", sb, mode);
 239
 240         inode = new_inode(sb);
 241         if (inode) {
 242                 inode->i_mode = mode;
 243                 inode->i_uid = current->fsuid;
 244                 inode->i_gid = current->fsgid;
 245                 inode->i_blksize = sb->s_blocksize;
 246                 inode->i_blocks = 0;
 247                 inode->i_rdev = 0;
 248                 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 249
 250                 switch (mode & S_IFMT) {
 251                 case S_IFIFO:
 252                 case S_IFBLK:
 253                 case S_IFCHR:
 254                 case S_IFSOCK:
 255                         if(!v9ses->extended) {
 256                                 dprintk(DEBUG_ERROR, "special files without extended mode\n");
 257                                 return ERR_PTR(-EINVAL);
 258                         }
 259                         init_special_inode(inode, inode->i_mode,
 260                                            inode->i_rdev);
 261                         break;
 262                 case S_IFREG:
 263                         inode->i_op = &v9fs_file_inode_operations;
 264                         inode->i_fop = &v9fs_file_operations;
 265                         break;
 266                 case S_IFLNK:
 267                         if(!v9ses->extended) {
 268                                 dprintk(DEBUG_ERROR, "extended modes used w/o 9P2000.u\n");
 269                                 return ERR_PTR(-EINVAL);
 270                         }
 271                         inode->i_op = &v9fs_symlink_inode_operations;
 272                         break;
 273                 case S_IFDIR:
 274                         inode->i_nlink++;
 275                         if(v9ses->extended)
 276                                 inode->i_op = &v9fs_dir_inode_operations_ext;
 277                         else
 278                                 inode->i_op = &v9fs_dir_inode_operations;
 279                         inode->i_fop = &v9fs_dir_operations;
 280                         break;
 281                 default:
 282                         dprintk(DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n",
 283                                 mode, mode & S_IFMT);
 284                         return ERR_PTR(-EINVAL);
 285                 }
 286         } else {
 287                 eprintk(KERN_WARNING, "Problem allocating inode\n");
 288                 return ERR_PTR(-ENOMEM);
 289         }
 290         return inode;
 291 }
 292
 293 /**
 294  * v9fs_create - helper function to create files and directories
 295  * @dir: directory inode file is being created in
 296  * @file_dentry: dentry file is being created in
 297  * @perm: permissions file is being created with
 298  * @open_mode: resulting open mode for file
 299  *
 300  */
 301
 302 static int
 303 v9fs_create(struct inode *dir,
 304             struct dentry *file_dentry,
 305             unsigned int perm, unsigned int open_mode)
 306 {
 307         struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
 308         struct super_block *sb = dir->i_sb;
 309         struct v9fs_fid *dirfid =
 310             v9fs_fid_lookup(file_dentry->d_parent);
 311         struct v9fs_fid *fid = NULL;
 312         struct inode *file_inode = NULL;
 313         struct v9fs_fcall *fcall = NULL;
 314         struct v9fs_qid qid;
 315         struct stat newstat;
 316         int dirfidnum = -1;
 317         long newfid = -1;
 318         int result = 0;
 319         unsigned int iounit = 0;
 320         int wfidno = -1;
 321
 322         perm = unixmode2p9mode(v9ses, perm);
 323
 324         dprintk(DEBUG_VFS, "dir: %p dentry: %p perm: %o mode: %o\n", dir,
 325                 file_dentry, perm, open_mode);
 326
 327         if (!dirfid)
 328                 return -EBADF;
 329
 330         dirfidnum = dirfid->fid;
 331         if (dirfidnum < 0) {
 332                 dprintk(DEBUG_ERROR, "No fid for the directory #%lu\n",
 333                         dir->i_ino);
 334                 return -EBADF;
 335         }
 336
 337         if (file_dentry->d_inode) {
 338                 dprintk(DEBUG_ERROR,
 339                         "Odd. There is an inode for dir %lu, name :%s:\n",
 340                         dir->i_ino, file_dentry->d_name.name);
 341                 return -EEXIST;
 342         }
 343
 344         newfid = v9fs_get_idpool(&v9ses->fidpool);
 345         if (newfid < 0) {
 346                 eprintk(KERN_WARNING, "no free fids available\n");
 347                 return -ENOSPC;
 348         }
 349
 350         result = v9fs_t_walk(v9ses, dirfidnum, newfid, NULL, &fcall);
 351         if (result < 0) {
 352                 dprintk(DEBUG_ERROR, "clone error: %s\n", FCALL_ERROR(fcall));
 353                 v9fs_put_idpool(newfid, &v9ses->fidpool);
 354                 newfid = -1;
 355                 goto CleanUpFid;
 356         }
 357
 358         kfree(fcall);
 359
 360         result = v9fs_t_create(v9ses, newfid, (char *)file_dentry->d_name.name,
 361                                perm, open_mode, &fcall);
 362         if (result < 0) {
 363                 dprintk(DEBUG_ERROR, "create fails: %s(%d)\n",
 364                         FCALL_ERROR(fcall), result);
 365
 366                 goto CleanUpFid;
 367         }
 368
 369         iounit = fcall->params.rcreate.iounit;
 370         qid = fcall->params.rcreate.qid;
 371         kfree(fcall);
 372
 373         fid = v9fs_fid_create(file_dentry, v9ses, newfid, 1);
 374         dprintk(DEBUG_VFS, "fid %p %d\n", fid, fid->fidcreate);
 375         if (!fid) {
 376                 result = -ENOMEM;
 377                 goto CleanUpFid;
 378         }
 379
 380         fid->qid = qid;
 381         fid->iounit = iounit;
 382
 383         /* walk to the newly created file and put the fid in the dentry */
 384         wfidno = v9fs_get_idpool(&v9ses->fidpool);
 385         if (newfid < 0) {
 386                 eprintk(KERN_WARNING, "no free fids available\n");
 387                 return -ENOSPC;
 388         }
 389
 390         result = v9fs_t_walk(v9ses, dirfidnum, wfidno,
 391                 (char *) file_dentry->d_name.name, NULL);
 392         if (result < 0) {
 393                 dprintk(DEBUG_ERROR, "clone error: %s\n", FCALL_ERROR(fcall));
 394                 v9fs_put_idpool(wfidno, &v9ses->fidpool);
 395                 wfidno = -1;
 396                 goto CleanUpFid;
 397         }
 398
 399         if (!v9fs_fid_create(file_dentry, v9ses, wfidno, 0)) {
 400                 if (!v9fs_t_clunk(v9ses, newfid, &fcall)) {
 401                         v9fs_put_idpool(wfidno, &v9ses->fidpool);
 402                 }
 403
 404                 goto CleanUpFid;
 405         }
 406
 407         if ((perm & V9FS_DMSYMLINK) || (perm & V9FS_DMLINK) ||
 408             (perm & V9FS_DMNAMEDPIPE) || (perm & V9FS_DMSOCKET) ||
 409             (perm & V9FS_DMDEVICE))
 410                 return 0;
 411
 412         result = v9fs_t_stat(v9ses, newfid, &fcall);
 413         if (result < 0) {
 414                 dprintk(DEBUG_ERROR, "stat error: %s(%d)\n", FCALL_ERROR(fcall),
 415                         result);
 416                 goto CleanUpFid;
 417         }
 418
 419         v9fs_mistat2unix(fcall->params.rstat.stat, &newstat, sb);
 420
 421         file_inode = v9fs_get_inode(sb, newstat.st_mode);
 422         if ((!file_inode) || IS_ERR(file_inode)) {
 423                 dprintk(DEBUG_ERROR, "create inode failed\n");
 424                 result = -EBADF;
 425                 goto CleanUpFid;
 426         }
 427
 428         v9fs_mistat2inode(fcall->params.rstat.stat, file_inode, sb);
 429         kfree(fcall);
 430         fcall = NULL;
 431         file_dentry->d_op = &v9fs_dentry_operations;
 432         d_instantiate(file_dentry, file_inode);
 433
 434         if (perm & V9FS_DMDIR) {
 435                 if (!v9fs_t_clunk(v9ses, newfid, &fcall))
 436                         v9fs_put_idpool(newfid, &v9ses->fidpool);
 437                 else
 438                         dprintk(DEBUG_ERROR, "clunk for mkdir failed: %s\n",
 439                                 FCALL_ERROR(fcall));
 440                 kfree(fcall);
 441                 fid->fidopen = 0;
 442                 fid->fidcreate = 0;
 443                 d_drop(file_dentry);
 444         }
 445
 446         return 0;
 447
 448       CleanUpFid:
 449         kfree(fcall);
 450
 451         if (newfid >= 0) {
 452                 if (!v9fs_t_clunk(v9ses, newfid, &fcall))
 453                         v9fs_put_idpool(newfid, &v9ses->fidpool);
 454                 else
 455                         dprintk(DEBUG_ERROR, "clunk failed: %s\n",
 456                                 FCALL_ERROR(fcall));
 457
 458                 kfree(fcall);
 459         }
 460         if (wfidno >= 0) {
 461                 if (!v9fs_t_clunk(v9ses, wfidno, &fcall))
 462                         v9fs_put_idpool(wfidno, &v9ses->fidpool);
 463                 else
 464                         dprintk(DEBUG_ERROR, "clunk failed: %s\n",
 465                                 FCALL_ERROR(fcall));
 466
 467                 kfree(fcall);
 468         }
 469         return result;
 470 }
 471
 472 /**
 473  * v9fs_remove - helper function to remove files and directories
 474  * @dir: directory inode that is being deleted
 475  * @file:  dentry that is being deleted
 476  * @rmdir: removing a directory
 477  *
 478  */
 479
 480 static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
 481 {
 482         struct v9fs_fcall *fcall = NULL;
 483         struct super_block *sb = NULL;
 484         struct v9fs_session_info *v9ses = NULL;
 485         struct v9fs_fid *v9fid = NULL;
 486         struct inode *file_inode = NULL;
 487         int fid = -1;
 488         int result = 0;
 489
 490         dprintk(DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file,
 491                 rmdir);
 492
 493         file_inode = file->d_inode;
 494         sb = file_inode->i_sb;
 495         v9ses = v9fs_inode2v9ses(file_inode);
 496         v9fid = v9fs_fid_lookup(file);
 497
 498         if (!v9fid) {
 499                 dprintk(DEBUG_ERROR,
 500                         "no v9fs_fid\n");
 501                 return -EBADF;
 502         }
 503
 504         fid = v9fid->fid;
 505         if (fid < 0) {
 506                 dprintk(DEBUG_ERROR, "inode #%lu, no fid!\n",
 507                         file_inode->i_ino);
 508                 return -EBADF;
 509         }
 510
 511         result = v9fs_t_remove(v9ses, fid, &fcall);
 512         if (result < 0)
 513                 dprintk(DEBUG_ERROR, "remove of file fails: %s(%d)\n",
 514                         FCALL_ERROR(fcall), result);
 515         else {
 516                 v9fs_put_idpool(fid, &v9ses->fidpool);
 517                 v9fs_fid_destroy(v9fid);
 518         }
 519
 520         kfree(fcall);
 521         return result;
 522 }
 523
 524 /**
 525  * v9fs_vfs_create - VFS hook to create files
 526  * @inode: directory inode that is being deleted
 527  * @dentry:  dentry that is being deleted
 528  * @perm: create permissions
 529  * @nd: path information
 530  *
 531  */
 532
 533 static int
 534 v9fs_vfs_create(struct inode *inode, struct dentry *dentry, int perm,
 535                 struct nameidata *nd)
 536 {
 537         return v9fs_create(inode, dentry, perm, O_RDWR);
 538 }
 539
 540 /**
 541  * v9fs_vfs_mkdir - VFS mkdir hook to create a directory
 542  * @inode:  inode that is being unlinked
 543  * @dentry: dentry that is being unlinked
 544  * @mode: mode for new directory
 545  *
 546  */
 547
 548 static int v9fs_vfs_mkdir(struct inode *inode, struct dentry *dentry, int mode)
 549 {
 550         return v9fs_create(inode, dentry, mode | S_IFDIR, O_RDONLY);
 551 }
 552
 553 /**
 554  * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
 555  * @dir:  inode that is being walked from
 556  * @dentry: dentry that is being walked to?
 557  * @nameidata: path data
 558  *
 559  */
 560
 561 static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
 562                                       struct nameidata *nameidata)
 563 {
 564         struct super_block *sb;
 565         struct v9fs_session_info *v9ses;
 566         struct v9fs_fid *dirfid;
 567         struct v9fs_fid *fid;
 568         struct inode *inode;
 569         struct v9fs_fcall *fcall = NULL;
 570         struct stat newstat;
 571         int dirfidnum = -1;
 572         int newfid = -1;
 573         int result = 0;
 574
 575         dprintk(DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
 576                 dir, dentry->d_iname, dentry, nameidata);
 577
 578         sb = dir->i_sb;
 579         v9ses = v9fs_inode2v9ses(dir);
 580         dirfid = v9fs_fid_lookup(dentry->d_parent);
 581
 582         if (!dirfid) {
 583                 dprintk(DEBUG_ERROR, "no dirfid\n");
 584                 return ERR_PTR(-EINVAL);
 585         }
 586
 587         dirfidnum = dirfid->fid;
 588
 589         if (dirfidnum < 0) {
 590                 dprintk(DEBUG_ERROR, "no dirfid for inode %p, #%lu\n",
 591                         dir, dir->i_ino);
 592                 return ERR_PTR(-EBADF);
 593         }
 594
 595         newfid = v9fs_get_idpool(&v9ses->fidpool);
 596         if (newfid < 0) {
 597                 eprintk(KERN_WARNING, "newfid fails!\n");
 598                 return ERR_PTR(-ENOSPC);
 599         }
 600
 601         result =
 602             v9fs_t_walk(v9ses, dirfidnum, newfid, (char *)dentry->d_name.name,
 603                         NULL);
 604         if (result < 0) {
 605                 v9fs_put_idpool(newfid, &v9ses->fidpool);
 606                 if (result == -ENOENT) {
 607                         d_add(dentry, NULL);
 608                         dprintk(DEBUG_VFS,
 609                                 "Return negative dentry %p count %d\n",
 610                                 dentry, atomic_read(&dentry->d_count));
 611                         return NULL;
 612                 }
 613                 dprintk(DEBUG_ERROR, "walk error:%d\n", result);
 614                 goto FreeFcall;
 615         }
 616
 617         result = v9fs_t_stat(v9ses, newfid, &fcall);
 618         if (result < 0) {
 619                 dprintk(DEBUG_ERROR, "stat error\n");
 620                 goto FreeFcall;
 621         }
 622
 623         v9fs_mistat2unix(fcall->params.rstat.stat, &newstat, sb);
 624         inode = v9fs_get_inode(sb, newstat.st_mode);
 625
 626         if (IS_ERR(inode) && (PTR_ERR(inode) == -ENOSPC)) {
 627                 eprintk(KERN_WARNING, "inode alloc failes, returns %ld\n",
 628                         PTR_ERR(inode));
 629
 630                 result = -ENOSPC;
 631                 goto FreeFcall;
 632         }
 633
 634         inode->i_ino = v9fs_qid2ino(&fcall->params.rstat.stat->qid);
 635
 636         fid = v9fs_fid_create(dentry, v9ses, newfid, 0);
 637         if (fid == NULL) {
 638                 dprintk(DEBUG_ERROR, "couldn't insert\n");
 639                 result = -ENOMEM;
 640                 goto FreeFcall;
 641         }
 642
 643         fid->qid = fcall->params.rstat.stat->qid;
 644
 645         dentry->d_op = &v9fs_dentry_operations;
 646         v9fs_mistat2inode(fcall->params.rstat.stat, inode, inode->i_sb);
 647
 648         d_add(dentry, inode);
 649         kfree(fcall);
 650
 651         return NULL;
 652
 653       FreeFcall:
 654         kfree(fcall);
 655         return ERR_PTR(result);
 656 }
 657
 658 /**
 659  * v9fs_vfs_unlink - VFS unlink hook to delete an inode
 660  * @i:  inode that is being unlinked
 661  * @d: dentry that is being unlinked
 662  *
 663  */
 664
 665 static int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
 666 {
 667         return v9fs_remove(i, d, 0);
 668 }
 669
 670 /**
 671  * v9fs_vfs_rmdir - VFS unlink hook to delete a directory
 672  * @i:  inode that is being unlinked
 673  * @d: dentry that is being unlinked
 674  *
 675  */
 676
 677 static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
 678 {
 679         return v9fs_remove(i, d, 1);
 680 }
 681
 682 /**
 683  * v9fs_vfs_rename - VFS hook to rename an inode
 684  * @old_dir:  old dir inode
 685  * @old_dentry: old dentry
 686  * @new_dir: new dir inode
 687  * @new_dentry: new dentry
 688  *
 689  */
 690
 691 static int
 692 v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 693                 struct inode *new_dir, struct dentry *new_dentry)
 694 {
 695         struct inode *old_inode = old_dentry->d_inode;
 696         struct v9fs_session_info *v9ses = v9fs_inode2v9ses(old_inode);
 697         struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry);
 698         struct v9fs_fid *olddirfid =
 699             v9fs_fid_lookup(old_dentry->d_parent);
 700         struct v9fs_fid *newdirfid =
 701             v9fs_fid_lookup(new_dentry->d_parent);
 702         struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
 703         struct v9fs_fcall *fcall = NULL;
 704         int fid = -1;
 705         int olddirfidnum = -1;
 706         int newdirfidnum = -1;
 707         int retval = 0;
 708
 709         dprintk(DEBUG_VFS, "\n");
 710
 711         if (!mistat)
 712                 return -ENOMEM;
 713
 714         if ((!oldfid) || (!olddirfid) || (!newdirfid)) {
 715                 dprintk(DEBUG_ERROR, "problem with arguments\n");
 716                 return -EBADF;
 717         }
 718
 719         /* 9P can only handle file rename in the same directory */
 720         if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) {
 721                 dprintk(DEBUG_ERROR, "old dir and new dir are different\n");
 722                 retval = -EPERM;
 723                 goto FreeFcallnBail;
 724         }
 725
 726         fid = oldfid->fid;
 727         olddirfidnum = olddirfid->fid;
 728         newdirfidnum = newdirfid->fid;
 729
 730         if (fid < 0) {
 731                 dprintk(DEBUG_ERROR, "no fid for old file #%lu\n",
 732                         old_inode->i_ino);
 733                 retval = -EBADF;
 734                 goto FreeFcallnBail;
 735         }
 736
 737         v9fs_blank_mistat(v9ses, mistat);
 738
 739         strcpy(mistat->data + 1, v9ses->name);
 740         mistat->name = mistat->data + 1 + strlen(v9ses->name);
 741
 742         if (new_dentry->d_name.len >
 743             (v9ses->maxdata - strlen(v9ses->name) - sizeof(struct v9fs_stat))) {
 744                 dprintk(DEBUG_ERROR, "new name too long\n");
 745                 goto FreeFcallnBail;
 746         }
 747
 748         strcpy(mistat->name, new_dentry->d_name.name);
 749         retval = v9fs_t_wstat(v9ses, fid, mistat, &fcall);
 750
 751       FreeFcallnBail:
 752         kfree(mistat);
 753
 754         if (retval < 0)
 755                 dprintk(DEBUG_ERROR, "v9fs_t_wstat error: %s\n",
 756                         FCALL_ERROR(fcall));
 757
 758         kfree(fcall);
 759         return retval;
 760 }
 761
 762 /**
 763  * v9fs_vfs_getattr - retreive file metadata
 764  * @mnt - mount information
 765  * @dentry - file to get attributes on
 766  * @stat - metadata structure to populate
 767  *
 768  */
 769
 770 static int
 771 v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
 772                  struct kstat *stat)
 773 {
 774         struct v9fs_fcall *fcall = NULL;
 775         struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
 776         struct v9fs_fid *fid = v9fs_fid_lookup(dentry);
 777         int err = -EPERM;
 778
 779         dprintk(DEBUG_VFS, "dentry: %p\n", dentry);
 780         if (!fid) {
 781                 dprintk(DEBUG_ERROR,
 782                         "couldn't find fid associated with dentry\n");
 783                 return -EBADF;
 784         }
 785
 786         err = v9fs_t_stat(v9ses, fid->fid, &fcall);
 787
 788         if (err < 0)
 789                 dprintk(DEBUG_ERROR, "stat error\n");
 790         else {
 791                 v9fs_mistat2inode(fcall->params.rstat.stat, dentry->d_inode,
 792                                   dentry->d_inode->i_sb);
 793                 generic_fillattr(dentry->d_inode, stat);
 794         }
 795
 796         kfree(fcall);
 797         return err;
 798 }
 799
 800 /**
 801  * v9fs_vfs_setattr - set file metadata
 802  * @dentry: file whose metadata to set
 803  * @iattr: metadata assignment structure
 804  *
 805  */
 806
 807 static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
 808 {
 809         struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
 810         struct v9fs_fid *fid = v9fs_fid_lookup(dentry);
 811         struct v9fs_fcall *fcall = NULL;
 812         struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
 813         int res = -EPERM;
 814
 815         dprintk(DEBUG_VFS, "\n");
 816
 817         if (!mistat)
 818                 return -ENOMEM;
 819
 820         if (!fid) {
 821                 dprintk(DEBUG_ERROR,
 822                         "Couldn't find fid associated with dentry\n");
 823                 return -EBADF;
 824         }
 825
 826         v9fs_blank_mistat(v9ses, mistat);
 827         if (iattr->ia_valid & ATTR_MODE)
 828                 mistat->mode = unixmode2p9mode(v9ses, iattr->ia_mode);
 829
 830         if (iattr->ia_valid & ATTR_MTIME)
 831                 mistat->mtime = iattr->ia_mtime.tv_sec;
 832
 833         if (iattr->ia_valid & ATTR_ATIME)
 834                 mistat->atime = iattr->ia_atime.tv_sec;
 835
 836         if (iattr->ia_valid & ATTR_SIZE)
 837                 mistat->length = iattr->ia_size;
 838
 839         if (v9ses->extended) {
 840                 char *ptr = mistat->data+1;
 841
 842                 if (iattr->ia_valid & ATTR_UID) {
 843                         mistat->uid = ptr;
 844                         ptr += 1+sprintf(ptr, "%08x", iattr->ia_uid);
 845                         mistat->n_uid = iattr->ia_uid;
 846                 }
 847
 848                 if (iattr->ia_valid & ATTR_GID) {
 849                         mistat->gid = ptr;
 850                         ptr += 1+sprintf(ptr, "%08x", iattr->ia_gid);
 851                         mistat->n_gid = iattr->ia_gid;
 852                 }
 853         }
 854
 855         res = v9fs_t_wstat(v9ses, fid->fid, mistat, &fcall);
 856
 857         if (res < 0)
 858                 dprintk(DEBUG_ERROR, "wstat error: %s\n", FCALL_ERROR(fcall));
 859
 860         kfree(mistat);
 861         kfree(fcall);
 862
 863         if (res >= 0)
 864                 res = inode_setattr(dentry->d_inode, iattr);
 865
 866         return res;
 867 }
 868
 869 /**
 870  * v9fs_mistat2inode - populate an inode structure with mistat info
 871  * @mistat: Plan 9 metadata (mistat) structure
 872  * @inode: inode to populate
 873  * @sb: superblock of filesystem
 874  *
 875  */
 876
 877 void
 878 v9fs_mistat2inode(struct v9fs_stat *mistat, struct inode *inode,
 879                   struct super_block *sb)
 880 {
 881         struct v9fs_session_info *v9ses = sb->s_fs_info;
 882
 883         inode->i_nlink = 1;
 884
 885         inode->i_atime.tv_sec = mistat->atime;
 886         inode->i_mtime.tv_sec = mistat->mtime;
 887         inode->i_ctime.tv_sec = mistat->mtime;
 888
 889         inode->i_uid = -1;
 890         inode->i_gid = -1;
 891
 892         if (v9ses->extended) {
 893                 /* TODO: string to uid mapping via user-space daemon */
 894                 inode->i_uid = mistat->n_uid;
 895                 inode->i_gid = mistat->n_gid;
 896
 897                 if (mistat->n_uid == -1)
 898                         sscanf(mistat->uid, "%x", &inode->i_uid);
 899
 900                 if (mistat->n_gid == -1)
 901                         sscanf(mistat->gid, "%x", &inode->i_gid);
 902         }
 903
 904         if (inode->i_uid == -1)
 905                 inode->i_uid = v9ses->uid;
 906         if (inode->i_gid == -1)
 907                 inode->i_gid = v9ses->gid;
 908
 909         inode->i_mode = p9mode2unixmode(v9ses, mistat->mode);
 910         if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) {
 911                 char type = 0;
 912                 int major = -1;
 913                 int minor = -1;
 914                 sscanf(mistat->extension, "%c %u %u", &type, &major, &minor);
 915                 switch (type) {
 916                 case 'c':
 917                         inode->i_mode &= ~S_IFBLK;
 918                         inode->i_mode |= S_IFCHR;
 919                         break;
 920                 case 'b':
 921                         break;
 922                 default:
 923                         dprintk(DEBUG_ERROR, "Unknown special type %c (%s)\n",
 924                                 type, mistat->extension);
 925                 };
 926                 inode->i_rdev = MKDEV(major, minor);
 927         } else
 928                 inode->i_rdev = 0;
 929
 930         inode->i_size = mistat->length;
 931
 932         inode->i_blksize = sb->s_blocksize;
 933         inode->i_blocks =
 934             (inode->i_size + inode->i_blksize - 1) >> sb->s_blocksize_bits;
 935 }
 936
 937 /**
 938  * v9fs_qid2ino - convert qid into inode number
 939  * @qid: qid to hash
 940  *
 941  * BUG: potential for inode number collisions?
 942  */
 943
 944 ino_t v9fs_qid2ino(struct v9fs_qid *qid)
 945 {
 946         u64 path = qid->path + 2;
 947         ino_t i = 0;
 948
 949         if (sizeof(ino_t) == sizeof(path))
 950                 memcpy(&i, &path, sizeof(ino_t));
 951         else
 952                 i = (ino_t) (path ^ (path >> 32));
 953
 954         return i;
 955 }
 956
 957 /**
 958  * v9fs_vfs_symlink - helper function to create symlinks
 959  * @dir: directory inode containing symlink
 960  * @dentry: dentry for symlink
 961  * @symname: symlink data
 962  *
 963  * See 9P2000.u RFC for more information
 964  *
 965  */
 966
 967 static int
 968 v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
 969 {
 970         int retval = -EPERM;
 971         struct v9fs_fid *newfid;
 972         struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
 973         struct v9fs_fcall *fcall = NULL;
 974         struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
 975
 976         dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
 977                 symname);
 978
 979         if (!mistat)
 980                 return -ENOMEM;
 981
 982         if (!v9ses->extended) {
 983                 dprintk(DEBUG_ERROR, "not extended\n");
 984                 goto FreeFcall;
 985         }
 986
 987         /* issue a create */
 988         retval = v9fs_create(dir, dentry, S_IFLNK, 0);
 989         if (retval != 0)
 990                 goto FreeFcall;
 991
 992         newfid = v9fs_fid_lookup(dentry);
 993
 994         /* issue a twstat */
 995         v9fs_blank_mistat(v9ses, mistat);
 996         strcpy(mistat->data + 1, symname);
 997         mistat->extension = mistat->data + 1;
 998         retval = v9fs_t_wstat(v9ses, newfid->fid, mistat, &fcall);
 999         if (retval < 0) {
1000                 dprintk(DEBUG_ERROR, "v9fs_t_wstat error: %s\n",
1001                         FCALL_ERROR(fcall));
1002                 goto FreeFcall;
1003         }
1004
1005         kfree(fcall);
1006
1007         if (v9fs_t_clunk(v9ses, newfid->fid, &fcall)) {
1008                 dprintk(DEBUG_ERROR, "clunk for symlink failed: %s\n",
1009                         FCALL_ERROR(fcall));
1010                 goto FreeFcall;
1011         }
1012
1013         d_drop(dentry);         /* FID - will this also clunk? */
1014
1015       FreeFcall:
1016         kfree(mistat);
1017         kfree(fcall);
1018
1019         return retval;
1020 }
1021
1022 /**
1023  * v9fs_readlink - read a symlink's location (internal version)
1024  * @dentry: dentry for symlink
1025  * @buffer: buffer to load symlink location into
1026  * @buflen: length of buffer
1027  *
1028  */
1029
1030 static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
1031 {
1032         int retval = -EPERM;
1033
1034         struct v9fs_fcall *fcall = NULL;
1035         struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
1036         struct v9fs_fid *fid = v9fs_fid_lookup(dentry);
1037
1038         if (!fid) {
1039                 dprintk(DEBUG_ERROR, "could not resolve fid from dentry\n");
1040                 retval = -EBADF;
1041                 goto FreeFcall;
1042         }
1043
1044         if (!v9ses->extended) {
1045                 retval = -EBADF;
1046                 dprintk(DEBUG_ERROR, "not extended\n");
1047                 goto FreeFcall;
1048         }
1049
1050         dprintk(DEBUG_VFS, " %s\n", dentry->d_name.name);
1051         retval = v9fs_t_stat(v9ses, fid->fid, &fcall);
1052
1053         if (retval < 0) {
1054                 dprintk(DEBUG_ERROR, "stat error\n");
1055                 goto FreeFcall;
1056         }
1057
1058         if (!fcall)
1059                 return -EIO;
1060
1061         if (!(fcall->params.rstat.stat->mode & V9FS_DMSYMLINK)) {
1062                 retval = -EINVAL;
1063                 goto FreeFcall;
1064         }
1065
1066         /* copy extension buffer into buffer */
1067         if (strlen(fcall->params.rstat.stat->extension) < buflen)
1068                 buflen = strlen(fcall->params.rstat.stat->extension);
1069
1070         memcpy(buffer, fcall->params.rstat.stat->extension, buflen + 1);
1071
1072         retval = buflen;
1073
1074       FreeFcall:
1075         kfree(fcall);
1076
1077         return retval;
1078 }
1079
1080 /**
1081  * v9fs_vfs_readlink - read a symlink's location
1082  * @dentry: dentry for symlink
1083  * @buf: buffer to load symlink location into
1084  * @buflen: length of buffer
1085  *
1086  */
1087
1088 static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer,
1089                              int buflen)
1090 {
1091         int retval;
1092         int ret;
1093         char *link = __getname();
1094
1095         if (buflen > PATH_MAX)
1096                 buflen = PATH_MAX;
1097
1098         dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
1099
1100         retval = v9fs_readlink(dentry, link, buflen);
1101
1102         if (retval > 0) {
1103                 if ((ret = copy_to_user(buffer, link, retval)) != 0) {
1104                         dprintk(DEBUG_ERROR, "problem copying to user: %d\n",
1105                                 ret);
1106                         retval = ret;
1107                 }
1108         }
1109
1110         __putname(link);
1111         return retval;
1112 }
1113
1114 /**
1115  * v9fs_vfs_follow_link - follow a symlink path
1116  * @dentry: dentry for symlink
1117  * @nd: nameidata
1118  *
1119  */
1120
1121 static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
1122 {
1123         int len = 0;
1124         char *link = __getname();
1125
1126         dprintk(DEBUG_VFS, "%s n", dentry->d_name.name);
1127
1128         if (!link)
1129                 link = ERR_PTR(-ENOMEM);
1130         else {
1131                 len = v9fs_readlink(dentry, link, strlen(link));
1132
1133                 if (len < 0) {
1134                         __putname(link);
1135                         link = ERR_PTR(len);
1136                 } else
1137                         link[len] = 0;
1138         }
1139         nd_set_link(nd, link);
1140
1141         return NULL;
1142 }
1143
1144 /**
1145  * v9fs_vfs_put_link - release a symlink path
1146  * @dentry: dentry for symlink
1147  * @nd: nameidata
1148  *
1149  */
1150
1151 static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
1152 {
1153         char *s = nd_get_link(nd);
1154
1155         dprintk(DEBUG_VFS, " %s %s\n", dentry->d_name.name, s);
1156         if (!IS_ERR(s))
1157                 __putname(s);
1158 }
1159
1160 /**
1161  * v9fs_vfs_link - create a hardlink
1162  * @old_dentry: dentry for file to link to
1163  * @dir: inode destination for new link
1164  * @dentry: dentry for link
1165  *
1166  */
1167
1168 /* XXX - lots of code dup'd from symlink and creates,
1169  * figure out a better reuse strategy
1170  */
1171
1172 static int
1173 v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
1174               struct dentry *dentry)
1175 {
1176         int retval = -EPERM;
1177         struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
1178         struct v9fs_fcall *fcall = NULL;
1179         struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
1180         struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry);
1181         struct v9fs_fid *newfid = NULL;
1182         char *symname = __getname();
1183
1184         dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
1185                 old_dentry->d_name.name);
1186
1187         if (!v9ses->extended) {
1188                 dprintk(DEBUG_ERROR, "not extended\n");
1189                 goto FreeMem;
1190         }
1191
1192         /* get fid of old_dentry */
1193         sprintf(symname, "hardlink(%d)\n", oldfid->fid);
1194
1195         /* issue a create */
1196         retval = v9fs_create(dir, dentry, V9FS_DMLINK, 0);
1197         if (retval != 0)
1198                 goto FreeMem;
1199
1200         newfid = v9fs_fid_lookup(dentry);
1201         if (!newfid) {
1202                 dprintk(DEBUG_ERROR, "couldn't resolve fid from dentry\n");
1203                 goto FreeMem;
1204         }
1205
1206         /* issue a twstat */
1207         v9fs_blank_mistat(v9ses, mistat);
1208         strcpy(mistat->data + 1, symname);
1209         mistat->extension = mistat->data + 1;
1210         retval = v9fs_t_wstat(v9ses, newfid->fid, mistat, &fcall);
1211         if (retval < 0) {
1212                 dprintk(DEBUG_ERROR, "v9fs_t_wstat error: %s\n",
1213                         FCALL_ERROR(fcall));
1214                 goto FreeMem;
1215         }
1216
1217         kfree(fcall);
1218
1219         if (v9fs_t_clunk(v9ses, newfid->fid, &fcall)) {
1220                 dprintk(DEBUG_ERROR, "clunk for symlink failed: %s\n",
1221                         FCALL_ERROR(fcall));
1222                 goto FreeMem;
1223         }
1224
1225         d_drop(dentry);         /* FID - will this also clunk? */
1226
1227         kfree(fcall);
1228         fcall = NULL;
1229
1230       FreeMem:
1231         kfree(mistat);
1232         kfree(fcall);
1233         __putname(symname);
1234         return retval;
1235 }
1236
1237 /**
1238  * v9fs_vfs_mknod - create a special file
1239  * @dir: inode destination for new link
1240  * @dentry: dentry for file
1241  * @mode: mode for creation
1242  * @dev_t: device associated with special file
1243  *
1244  */
1245
1246 static int
1247 v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
1248 {
1249         int retval = -EPERM;
1250         struct v9fs_fid *newfid;
1251         struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
1252         struct v9fs_fcall *fcall = NULL;
1253         struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
1254         char *symname = __getname();
1255
1256         dprintk(DEBUG_VFS, " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
1257                 dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
1258
1259         if (!mistat)
1260                 return -ENOMEM;
1261
1262         if (!new_valid_dev(rdev)) {
1263                 retval = -EINVAL;
1264                 goto FreeMem;
1265         }
1266
1267         if (!v9ses->extended) {
1268                 dprintk(DEBUG_ERROR, "not extended\n");
1269                 goto FreeMem;
1270         }
1271
1272         /* issue a create */
1273         retval = v9fs_create(dir, dentry, mode, 0);
1274
1275         if (retval != 0)
1276                 goto FreeMem;
1277
1278         newfid = v9fs_fid_lookup(dentry);
1279         if (!newfid) {
1280                 dprintk(DEBUG_ERROR, "coudn't resove fid from dentry\n");
1281                 retval = -EINVAL;
1282                 goto FreeMem;
1283         }
1284
1285         /* build extension */
1286         if (S_ISBLK(mode))
1287                 sprintf(symname, "b %u %u", MAJOR(rdev), MINOR(rdev));
1288         else if (S_ISCHR(mode))
1289                 sprintf(symname, "c %u %u", MAJOR(rdev), MINOR(rdev));
1290         else if (S_ISFIFO(mode))
1291                 ;       /* DO NOTHING */
1292         else {
1293                 retval = -EINVAL;
1294                 goto FreeMem;
1295         }
1296
1297         if (!S_ISFIFO(mode)) {
1298                 /* issue a twstat */
1299                 v9fs_blank_mistat(v9ses, mistat);
1300                 strcpy(mistat->data + 1, symname);
1301                 mistat->extension = mistat->data + 1;
1302                 retval = v9fs_t_wstat(v9ses, newfid->fid, mistat, &fcall);
1303                 if (retval < 0) {
1304                         dprintk(DEBUG_ERROR, "v9fs_t_wstat error: %s\n",
1305                                 FCALL_ERROR(fcall));
1306                         goto FreeMem;
1307                 }
1308         }
1309
1310         /* need to update dcache so we show up */
1311         kfree(fcall);
1312
1313         if (v9fs_t_clunk(v9ses, newfid->fid, &fcall)) {
1314                 dprintk(DEBUG_ERROR, "clunk for symlink failed: %s\n",
1315                         FCALL_ERROR(fcall));
1316                 goto FreeMem;
1317         }
1318
1319         d_drop(dentry);         /* FID - will this also clunk? */
1320
1321       FreeMem:
1322         kfree(mistat);
1323         kfree(fcall);
1324         __putname(symname);
1325
1326         return retval;
1327 }
1328
1329 static struct inode_operations v9fs_dir_inode_operations_ext = {
1330         .create = v9fs_vfs_create,
1331         .lookup = v9fs_vfs_lookup,
1332         .symlink = v9fs_vfs_symlink,
1333         .link = v9fs_vfs_link,
1334         .unlink = v9fs_vfs_unlink,
1335         .mkdir = v9fs_vfs_mkdir,
1336         .rmdir = v9fs_vfs_rmdir,
1337         .mknod = v9fs_vfs_mknod,
1338         .rename = v9fs_vfs_rename,
1339         .readlink = v9fs_vfs_readlink,
1340         .getattr = v9fs_vfs_getattr,
1341         .setattr = v9fs_vfs_setattr,
1342 };
1343
1344 static struct inode_operations v9fs_dir_inode_operations = {
1345         .create = v9fs_vfs_create,
1346         .lookup = v9fs_vfs_lookup,
1347         .unlink = v9fs_vfs_unlink,
1348         .mkdir = v9fs_vfs_mkdir,
1349         .rmdir = v9fs_vfs_rmdir,
1350         .mknod = v9fs_vfs_mknod,
1351         .rename = v9fs_vfs_rename,
1352         .getattr = v9fs_vfs_getattr,
1353         .setattr = v9fs_vfs_setattr,
1354 };
1355
1356 static struct inode_operations v9fs_file_inode_operations = {
1357         .getattr = v9fs_vfs_getattr,
1358         .setattr = v9fs_vfs_setattr,
1359 };
1360
1361 static struct inode_operations v9fs_symlink_inode_operations = {
1362         .readlink = v9fs_vfs_readlink,
1363         .follow_link = v9fs_vfs_follow_link,
1364         .put_link = v9fs_vfs_put_link,
1365         .getattr = v9fs_vfs_getattr,
1366         .setattr = v9fs_vfs_setattr,
1367 };