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TOMOYO Linux Cross Reference
Linux/fs/xfs/xfs_iops.c

Version: ~ [ linux-5.5-rc1 ] ~ [ linux-5.4.2 ] ~ [ linux-5.3.15 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.88 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.158 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.206 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.206 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.78 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
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  1 /*
  2  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
  3  * All Rights Reserved.
  4  *
  5  * This program is free software; you can redistribute it and/or
  6  * modify it under the terms of the GNU General Public License as
  7  * published by the Free Software Foundation.
  8  *
  9  * This program is distributed in the hope that it would be useful,
 10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 12  * GNU General Public License for more details.
 13  *
 14  * You should have received a copy of the GNU General Public License
 15  * along with this program; if not, write the Free Software Foundation,
 16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 17  */
 18 #include "xfs.h"
 19 #include "xfs_fs.h"
 20 #include "xfs_shared.h"
 21 #include "xfs_format.h"
 22 #include "xfs_log_format.h"
 23 #include "xfs_trans_resv.h"
 24 #include "xfs_mount.h"
 25 #include "xfs_da_format.h"
 26 #include "xfs_inode.h"
 27 #include "xfs_bmap.h"
 28 #include "xfs_bmap_util.h"
 29 #include "xfs_acl.h"
 30 #include "xfs_quota.h"
 31 #include "xfs_error.h"
 32 #include "xfs_attr.h"
 33 #include "xfs_trans.h"
 34 #include "xfs_trace.h"
 35 #include "xfs_icache.h"
 36 #include "xfs_symlink.h"
 37 #include "xfs_da_btree.h"
 38 #include "xfs_dir2.h"
 39 #include "xfs_trans_space.h"
 40 #include "xfs_pnfs.h"
 41 #include "xfs_iomap.h"
 42 
 43 #include <linux/capability.h>
 44 #include <linux/xattr.h>
 45 #include <linux/posix_acl.h>
 46 #include <linux/security.h>
 47 #include <linux/iomap.h>
 48 #include <linux/slab.h>
 49 
 50 /*
 51  * Directories have different lock order w.r.t. mmap_sem compared to regular
 52  * files. This is due to readdir potentially triggering page faults on a user
 53  * buffer inside filldir(), and this happens with the ilock on the directory
 54  * held. For regular files, the lock order is the other way around - the
 55  * mmap_sem is taken during the page fault, and then we lock the ilock to do
 56  * block mapping. Hence we need a different class for the directory ilock so
 57  * that lockdep can tell them apart.
 58  */
 59 static struct lock_class_key xfs_nondir_ilock_class;
 60 static struct lock_class_key xfs_dir_ilock_class;
 61 
 62 static int
 63 xfs_initxattrs(
 64         struct inode            *inode,
 65         const struct xattr      *xattr_array,
 66         void                    *fs_info)
 67 {
 68         const struct xattr      *xattr;
 69         struct xfs_inode        *ip = XFS_I(inode);
 70         int                     error = 0;
 71 
 72         for (xattr = xattr_array; xattr->name != NULL; xattr++) {
 73                 error = xfs_attr_set(ip, xattr->name, xattr->value,
 74                                       xattr->value_len, ATTR_SECURE);
 75                 if (error < 0)
 76                         break;
 77         }
 78         return error;
 79 }
 80 
 81 /*
 82  * Hook in SELinux.  This is not quite correct yet, what we really need
 83  * here (as we do for default ACLs) is a mechanism by which creation of
 84  * these attrs can be journalled at inode creation time (along with the
 85  * inode, of course, such that log replay can't cause these to be lost).
 86  */
 87 
 88 STATIC int
 89 xfs_init_security(
 90         struct inode    *inode,
 91         struct inode    *dir,
 92         const struct qstr *qstr)
 93 {
 94         return security_inode_init_security(inode, dir, qstr,
 95                                              &xfs_initxattrs, NULL);
 96 }
 97 
 98 static void
 99 xfs_dentry_to_name(
100         struct xfs_name *namep,
101         struct dentry   *dentry)
102 {
103         namep->name = dentry->d_name.name;
104         namep->len = dentry->d_name.len;
105         namep->type = XFS_DIR3_FT_UNKNOWN;
106 }
107 
108 static int
109 xfs_dentry_mode_to_name(
110         struct xfs_name *namep,
111         struct dentry   *dentry,
112         int             mode)
113 {
114         namep->name = dentry->d_name.name;
115         namep->len = dentry->d_name.len;
116         namep->type = xfs_mode_to_ftype(mode);
117 
118         if (unlikely(namep->type == XFS_DIR3_FT_UNKNOWN))
119                 return -EFSCORRUPTED;
120 
121         return 0;
122 }
123 
124 STATIC void
125 xfs_cleanup_inode(
126         struct inode    *dir,
127         struct inode    *inode,
128         struct dentry   *dentry)
129 {
130         struct xfs_name teardown;
131 
132         /* Oh, the horror.
133          * If we can't add the ACL or we fail in
134          * xfs_init_security we must back out.
135          * ENOSPC can hit here, among other things.
136          */
137         xfs_dentry_to_name(&teardown, dentry);
138 
139         xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
140 }
141 
142 STATIC int
143 xfs_generic_create(
144         struct inode    *dir,
145         struct dentry   *dentry,
146         umode_t         mode,
147         dev_t           rdev,
148         bool            tmpfile)        /* unnamed file */
149 {
150         struct inode    *inode;
151         struct xfs_inode *ip = NULL;
152         struct posix_acl *default_acl, *acl;
153         struct xfs_name name;
154         int             error;
155 
156         /*
157          * Irix uses Missed'em'V split, but doesn't want to see
158          * the upper 5 bits of (14bit) major.
159          */
160         if (S_ISCHR(mode) || S_ISBLK(mode)) {
161                 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
162                         return -EINVAL;
163         } else {
164                 rdev = 0;
165         }
166 
167         error = posix_acl_create(dir, &mode, &default_acl, &acl);
168         if (error)
169                 return error;
170 
171         /* Verify mode is valid also for tmpfile case */
172         error = xfs_dentry_mode_to_name(&name, dentry, mode);
173         if (unlikely(error))
174                 goto out_free_acl;
175 
176         if (!tmpfile) {
177                 error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip);
178         } else {
179                 error = xfs_create_tmpfile(XFS_I(dir), dentry, mode, &ip);
180         }
181         if (unlikely(error))
182                 goto out_free_acl;
183 
184         inode = VFS_I(ip);
185 
186         error = xfs_init_security(inode, dir, &dentry->d_name);
187         if (unlikely(error))
188                 goto out_cleanup_inode;
189 
190 #ifdef CONFIG_XFS_POSIX_ACL
191         if (default_acl) {
192                 error = __xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
193                 if (error)
194                         goto out_cleanup_inode;
195         }
196         if (acl) {
197                 error = __xfs_set_acl(inode, acl, ACL_TYPE_ACCESS);
198                 if (error)
199                         goto out_cleanup_inode;
200         }
201 #endif
202 
203         xfs_setup_iops(ip);
204 
205         if (tmpfile)
206                 d_tmpfile(dentry, inode);
207         else
208                 d_instantiate(dentry, inode);
209 
210         xfs_finish_inode_setup(ip);
211 
212  out_free_acl:
213         if (default_acl)
214                 posix_acl_release(default_acl);
215         if (acl)
216                 posix_acl_release(acl);
217         return error;
218 
219  out_cleanup_inode:
220         xfs_finish_inode_setup(ip);
221         if (!tmpfile)
222                 xfs_cleanup_inode(dir, inode, dentry);
223         iput(inode);
224         goto out_free_acl;
225 }
226 
227 STATIC int
228 xfs_vn_mknod(
229         struct inode    *dir,
230         struct dentry   *dentry,
231         umode_t         mode,
232         dev_t           rdev)
233 {
234         return xfs_generic_create(dir, dentry, mode, rdev, false);
235 }
236 
237 STATIC int
238 xfs_vn_create(
239         struct inode    *dir,
240         struct dentry   *dentry,
241         umode_t         mode,
242         bool            flags)
243 {
244         return xfs_vn_mknod(dir, dentry, mode, 0);
245 }
246 
247 STATIC int
248 xfs_vn_mkdir(
249         struct inode    *dir,
250         struct dentry   *dentry,
251         umode_t         mode)
252 {
253         return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
254 }
255 
256 STATIC struct dentry *
257 xfs_vn_lookup(
258         struct inode    *dir,
259         struct dentry   *dentry,
260         unsigned int flags)
261 {
262         struct xfs_inode *cip;
263         struct xfs_name name;
264         int             error;
265 
266         if (dentry->d_name.len >= MAXNAMELEN)
267                 return ERR_PTR(-ENAMETOOLONG);
268 
269         xfs_dentry_to_name(&name, dentry);
270         error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
271         if (unlikely(error)) {
272                 if (unlikely(error != -ENOENT))
273                         return ERR_PTR(error);
274                 d_add(dentry, NULL);
275                 return NULL;
276         }
277 
278         return d_splice_alias(VFS_I(cip), dentry);
279 }
280 
281 STATIC struct dentry *
282 xfs_vn_ci_lookup(
283         struct inode    *dir,
284         struct dentry   *dentry,
285         unsigned int flags)
286 {
287         struct xfs_inode *ip;
288         struct xfs_name xname;
289         struct xfs_name ci_name;
290         struct qstr     dname;
291         int             error;
292 
293         if (dentry->d_name.len >= MAXNAMELEN)
294                 return ERR_PTR(-ENAMETOOLONG);
295 
296         xfs_dentry_to_name(&xname, dentry);
297         error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
298         if (unlikely(error)) {
299                 if (unlikely(error != -ENOENT))
300                         return ERR_PTR(error);
301                 /*
302                  * call d_add(dentry, NULL) here when d_drop_negative_children
303                  * is called in xfs_vn_mknod (ie. allow negative dentries
304                  * with CI filesystems).
305                  */
306                 return NULL;
307         }
308 
309         /* if exact match, just splice and exit */
310         if (!ci_name.name)
311                 return d_splice_alias(VFS_I(ip), dentry);
312 
313         /* else case-insensitive match... */
314         dname.name = ci_name.name;
315         dname.len = ci_name.len;
316         dentry = d_add_ci(dentry, VFS_I(ip), &dname);
317         kmem_free(ci_name.name);
318         return dentry;
319 }
320 
321 STATIC int
322 xfs_vn_link(
323         struct dentry   *old_dentry,
324         struct inode    *dir,
325         struct dentry   *dentry)
326 {
327         struct inode    *inode = d_inode(old_dentry);
328         struct xfs_name name;
329         int             error;
330 
331         error = xfs_dentry_mode_to_name(&name, dentry, inode->i_mode);
332         if (unlikely(error))
333                 return error;
334 
335         error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
336         if (unlikely(error))
337                 return error;
338 
339         ihold(inode);
340         d_instantiate(dentry, inode);
341         return 0;
342 }
343 
344 STATIC int
345 xfs_vn_unlink(
346         struct inode    *dir,
347         struct dentry   *dentry)
348 {
349         struct xfs_name name;
350         int             error;
351 
352         xfs_dentry_to_name(&name, dentry);
353 
354         error = xfs_remove(XFS_I(dir), &name, XFS_I(d_inode(dentry)));
355         if (error)
356                 return error;
357 
358         /*
359          * With unlink, the VFS makes the dentry "negative": no inode,
360          * but still hashed. This is incompatible with case-insensitive
361          * mode, so invalidate (unhash) the dentry in CI-mode.
362          */
363         if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
364                 d_invalidate(dentry);
365         return 0;
366 }
367 
368 STATIC int
369 xfs_vn_symlink(
370         struct inode    *dir,
371         struct dentry   *dentry,
372         const char      *symname)
373 {
374         struct inode    *inode;
375         struct xfs_inode *cip = NULL;
376         struct xfs_name name;
377         int             error;
378         umode_t         mode;
379 
380         mode = S_IFLNK |
381                 (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO);
382         error = xfs_dentry_mode_to_name(&name, dentry, mode);
383         if (unlikely(error))
384                 goto out;
385 
386         error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip);
387         if (unlikely(error))
388                 goto out;
389 
390         inode = VFS_I(cip);
391 
392         error = xfs_init_security(inode, dir, &dentry->d_name);
393         if (unlikely(error))
394                 goto out_cleanup_inode;
395 
396         xfs_setup_iops(cip);
397 
398         d_instantiate(dentry, inode);
399         xfs_finish_inode_setup(cip);
400         return 0;
401 
402  out_cleanup_inode:
403         xfs_finish_inode_setup(cip);
404         xfs_cleanup_inode(dir, inode, dentry);
405         iput(inode);
406  out:
407         return error;
408 }
409 
410 STATIC int
411 xfs_vn_rename(
412         struct inode    *odir,
413         struct dentry   *odentry,
414         struct inode    *ndir,
415         struct dentry   *ndentry,
416         unsigned int    flags)
417 {
418         struct inode    *new_inode = d_inode(ndentry);
419         int             omode = 0;
420         int             error;
421         struct xfs_name oname;
422         struct xfs_name nname;
423 
424         if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
425                 return -EINVAL;
426 
427         /* if we are exchanging files, we need to set i_mode of both files */
428         if (flags & RENAME_EXCHANGE)
429                 omode = d_inode(ndentry)->i_mode;
430 
431         error = xfs_dentry_mode_to_name(&oname, odentry, omode);
432         if (omode && unlikely(error))
433                 return error;
434 
435         error = xfs_dentry_mode_to_name(&nname, ndentry,
436                                         d_inode(odentry)->i_mode);
437         if (unlikely(error))
438                 return error;
439 
440         return xfs_rename(XFS_I(odir), &oname, XFS_I(d_inode(odentry)),
441                           XFS_I(ndir), &nname,
442                           new_inode ? XFS_I(new_inode) : NULL, flags);
443 }
444 
445 /*
446  * careful here - this function can get called recursively, so
447  * we need to be very careful about how much stack we use.
448  * uio is kmalloced for this reason...
449  */
450 STATIC const char *
451 xfs_vn_get_link(
452         struct dentry           *dentry,
453         struct inode            *inode,
454         struct delayed_call     *done)
455 {
456         char                    *link;
457         int                     error = -ENOMEM;
458 
459         if (!dentry)
460                 return ERR_PTR(-ECHILD);
461 
462         link = kmalloc(XFS_SYMLINK_MAXLEN+1, GFP_KERNEL);
463         if (!link)
464                 goto out_err;
465 
466         error = xfs_readlink(XFS_I(d_inode(dentry)), link);
467         if (unlikely(error))
468                 goto out_kfree;
469 
470         set_delayed_call(done, kfree_link, link);
471         return link;
472 
473  out_kfree:
474         kfree(link);
475  out_err:
476         return ERR_PTR(error);
477 }
478 
479 STATIC const char *
480 xfs_vn_get_link_inline(
481         struct dentry           *dentry,
482         struct inode            *inode,
483         struct delayed_call     *done)
484 {
485         ASSERT(XFS_I(inode)->i_df.if_flags & XFS_IFINLINE);
486         return XFS_I(inode)->i_df.if_u1.if_data;
487 }
488 
489 STATIC int
490 xfs_vn_getattr(
491         const struct path       *path,
492         struct kstat            *stat,
493         u32                     request_mask,
494         unsigned int            query_flags)
495 {
496         struct inode            *inode = d_inode(path->dentry);
497         struct xfs_inode        *ip = XFS_I(inode);
498         struct xfs_mount        *mp = ip->i_mount;
499 
500         trace_xfs_getattr(ip);
501 
502         if (XFS_FORCED_SHUTDOWN(mp))
503                 return -EIO;
504 
505         stat->size = XFS_ISIZE(ip);
506         stat->dev = inode->i_sb->s_dev;
507         stat->mode = inode->i_mode;
508         stat->nlink = inode->i_nlink;
509         stat->uid = inode->i_uid;
510         stat->gid = inode->i_gid;
511         stat->ino = ip->i_ino;
512         stat->atime = inode->i_atime;
513         stat->mtime = inode->i_mtime;
514         stat->ctime = inode->i_ctime;
515         stat->blocks =
516                 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
517 
518         if (ip->i_d.di_version == 3) {
519                 if (request_mask & STATX_BTIME) {
520                         stat->result_mask |= STATX_BTIME;
521                         stat->btime.tv_sec = ip->i_d.di_crtime.t_sec;
522                         stat->btime.tv_nsec = ip->i_d.di_crtime.t_nsec;
523                 }
524         }
525 
526         if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
527                 stat->attributes |= STATX_ATTR_IMMUTABLE;
528         if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
529                 stat->attributes |= STATX_ATTR_APPEND;
530         if (ip->i_d.di_flags & XFS_DIFLAG_NODUMP)
531                 stat->attributes |= STATX_ATTR_NODUMP;
532 
533         switch (inode->i_mode & S_IFMT) {
534         case S_IFBLK:
535         case S_IFCHR:
536                 stat->blksize = BLKDEV_IOSIZE;
537                 stat->rdev = inode->i_rdev;
538                 break;
539         default:
540                 if (XFS_IS_REALTIME_INODE(ip)) {
541                         /*
542                          * If the file blocks are being allocated from a
543                          * realtime volume, then return the inode's realtime
544                          * extent size or the realtime volume's extent size.
545                          */
546                         stat->blksize =
547                                 xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
548                 } else
549                         stat->blksize = xfs_preferred_iosize(mp);
550                 stat->rdev = 0;
551                 break;
552         }
553 
554         return 0;
555 }
556 
557 static void
558 xfs_setattr_mode(
559         struct xfs_inode        *ip,
560         struct iattr            *iattr)
561 {
562         struct inode            *inode = VFS_I(ip);
563         umode_t                 mode = iattr->ia_mode;
564 
565         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
566 
567         inode->i_mode &= S_IFMT;
568         inode->i_mode |= mode & ~S_IFMT;
569 }
570 
571 void
572 xfs_setattr_time(
573         struct xfs_inode        *ip,
574         struct iattr            *iattr)
575 {
576         struct inode            *inode = VFS_I(ip);
577 
578         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
579 
580         if (iattr->ia_valid & ATTR_ATIME)
581                 inode->i_atime = iattr->ia_atime;
582         if (iattr->ia_valid & ATTR_CTIME)
583                 inode->i_ctime = iattr->ia_ctime;
584         if (iattr->ia_valid & ATTR_MTIME)
585                 inode->i_mtime = iattr->ia_mtime;
586 }
587 
588 static int
589 xfs_vn_change_ok(
590         struct dentry   *dentry,
591         struct iattr    *iattr)
592 {
593         struct xfs_mount        *mp = XFS_I(d_inode(dentry))->i_mount;
594 
595         if (mp->m_flags & XFS_MOUNT_RDONLY)
596                 return -EROFS;
597 
598         if (XFS_FORCED_SHUTDOWN(mp))
599                 return -EIO;
600 
601         return setattr_prepare(dentry, iattr);
602 }
603 
604 /*
605  * Set non-size attributes of an inode.
606  *
607  * Caution: The caller of this function is responsible for calling
608  * setattr_prepare() or otherwise verifying the change is fine.
609  */
610 int
611 xfs_setattr_nonsize(
612         struct xfs_inode        *ip,
613         struct iattr            *iattr,
614         int                     flags)
615 {
616         xfs_mount_t             *mp = ip->i_mount;
617         struct inode            *inode = VFS_I(ip);
618         int                     mask = iattr->ia_valid;
619         xfs_trans_t             *tp;
620         int                     error;
621         kuid_t                  uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID;
622         kgid_t                  gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID;
623         struct xfs_dquot        *udqp = NULL, *gdqp = NULL;
624         struct xfs_dquot        *olddquot1 = NULL, *olddquot2 = NULL;
625 
626         ASSERT((mask & ATTR_SIZE) == 0);
627 
628         /*
629          * If disk quotas is on, we make sure that the dquots do exist on disk,
630          * before we start any other transactions. Trying to do this later
631          * is messy. We don't care to take a readlock to look at the ids
632          * in inode here, because we can't hold it across the trans_reserve.
633          * If the IDs do change before we take the ilock, we're covered
634          * because the i_*dquot fields will get updated anyway.
635          */
636         if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) {
637                 uint    qflags = 0;
638 
639                 if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) {
640                         uid = iattr->ia_uid;
641                         qflags |= XFS_QMOPT_UQUOTA;
642                 } else {
643                         uid = inode->i_uid;
644                 }
645                 if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) {
646                         gid = iattr->ia_gid;
647                         qflags |= XFS_QMOPT_GQUOTA;
648                 }  else {
649                         gid = inode->i_gid;
650                 }
651 
652                 /*
653                  * We take a reference when we initialize udqp and gdqp,
654                  * so it is important that we never blindly double trip on
655                  * the same variable. See xfs_create() for an example.
656                  */
657                 ASSERT(udqp == NULL);
658                 ASSERT(gdqp == NULL);
659                 error = xfs_qm_vop_dqalloc(ip, xfs_kuid_to_uid(uid),
660                                            xfs_kgid_to_gid(gid),
661                                            xfs_get_projid(ip),
662                                            qflags, &udqp, &gdqp, NULL);
663                 if (error)
664                         return error;
665         }
666 
667         error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
668         if (error)
669                 goto out_dqrele;
670 
671         xfs_ilock(ip, XFS_ILOCK_EXCL);
672         xfs_trans_ijoin(tp, ip, 0);
673 
674         /*
675          * Change file ownership.  Must be the owner or privileged.
676          */
677         if (mask & (ATTR_UID|ATTR_GID)) {
678                 /*
679                  * These IDs could have changed since we last looked at them.
680                  * But, we're assured that if the ownership did change
681                  * while we didn't have the inode locked, inode's dquot(s)
682                  * would have changed also.
683                  */
684                 iuid = inode->i_uid;
685                 igid = inode->i_gid;
686                 gid = (mask & ATTR_GID) ? iattr->ia_gid : igid;
687                 uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid;
688 
689                 /*
690                  * Do a quota reservation only if uid/gid is actually
691                  * going to change.
692                  */
693                 if (XFS_IS_QUOTA_RUNNING(mp) &&
694                     ((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) ||
695                      (XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) {
696                         ASSERT(tp);
697                         error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
698                                                 NULL, capable(CAP_FOWNER) ?
699                                                 XFS_QMOPT_FORCE_RES : 0);
700                         if (error)      /* out of quota */
701                                 goto out_cancel;
702                 }
703         }
704 
705         /*
706          * Change file ownership.  Must be the owner or privileged.
707          */
708         if (mask & (ATTR_UID|ATTR_GID)) {
709                 /*
710                  * CAP_FSETID overrides the following restrictions:
711                  *
712                  * The set-user-ID and set-group-ID bits of a file will be
713                  * cleared upon successful return from chown()
714                  */
715                 if ((inode->i_mode & (S_ISUID|S_ISGID)) &&
716                     !capable(CAP_FSETID))
717                         inode->i_mode &= ~(S_ISUID|S_ISGID);
718 
719                 /*
720                  * Change the ownerships and register quota modifications
721                  * in the transaction.
722                  */
723                 if (!uid_eq(iuid, uid)) {
724                         if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) {
725                                 ASSERT(mask & ATTR_UID);
726                                 ASSERT(udqp);
727                                 olddquot1 = xfs_qm_vop_chown(tp, ip,
728                                                         &ip->i_udquot, udqp);
729                         }
730                         ip->i_d.di_uid = xfs_kuid_to_uid(uid);
731                         inode->i_uid = uid;
732                 }
733                 if (!gid_eq(igid, gid)) {
734                         if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) {
735                                 ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) ||
736                                        !XFS_IS_PQUOTA_ON(mp));
737                                 ASSERT(mask & ATTR_GID);
738                                 ASSERT(gdqp);
739                                 olddquot2 = xfs_qm_vop_chown(tp, ip,
740                                                         &ip->i_gdquot, gdqp);
741                         }
742                         ip->i_d.di_gid = xfs_kgid_to_gid(gid);
743                         inode->i_gid = gid;
744                 }
745         }
746 
747         if (mask & ATTR_MODE)
748                 xfs_setattr_mode(ip, iattr);
749         if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
750                 xfs_setattr_time(ip, iattr);
751 
752         xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
753 
754         XFS_STATS_INC(mp, xs_ig_attrchg);
755 
756         if (mp->m_flags & XFS_MOUNT_WSYNC)
757                 xfs_trans_set_sync(tp);
758         error = xfs_trans_commit(tp);
759 
760         xfs_iunlock(ip, XFS_ILOCK_EXCL);
761 
762         /*
763          * Release any dquot(s) the inode had kept before chown.
764          */
765         xfs_qm_dqrele(olddquot1);
766         xfs_qm_dqrele(olddquot2);
767         xfs_qm_dqrele(udqp);
768         xfs_qm_dqrele(gdqp);
769 
770         if (error)
771                 return error;
772 
773         /*
774          * XXX(hch): Updating the ACL entries is not atomic vs the i_mode
775          *           update.  We could avoid this with linked transactions
776          *           and passing down the transaction pointer all the way
777          *           to attr_set.  No previous user of the generic
778          *           Posix ACL code seems to care about this issue either.
779          */
780         if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) {
781                 error = posix_acl_chmod(inode, inode->i_mode);
782                 if (error)
783                         return error;
784         }
785 
786         return 0;
787 
788 out_cancel:
789         xfs_trans_cancel(tp);
790 out_dqrele:
791         xfs_qm_dqrele(udqp);
792         xfs_qm_dqrele(gdqp);
793         return error;
794 }
795 
796 int
797 xfs_vn_setattr_nonsize(
798         struct dentry           *dentry,
799         struct iattr            *iattr)
800 {
801         struct xfs_inode        *ip = XFS_I(d_inode(dentry));
802         int error;
803 
804         trace_xfs_setattr(ip);
805 
806         error = xfs_vn_change_ok(dentry, iattr);
807         if (error)
808                 return error;
809         return xfs_setattr_nonsize(ip, iattr, 0);
810 }
811 
812 /*
813  * Truncate file.  Must have write permission and not be a directory.
814  *
815  * Caution: The caller of this function is responsible for calling
816  * setattr_prepare() or otherwise verifying the change is fine.
817  */
818 STATIC int
819 xfs_setattr_size(
820         struct xfs_inode        *ip,
821         struct iattr            *iattr)
822 {
823         struct xfs_mount        *mp = ip->i_mount;
824         struct inode            *inode = VFS_I(ip);
825         xfs_off_t               oldsize, newsize;
826         struct xfs_trans        *tp;
827         int                     error;
828         uint                    lock_flags = 0;
829         bool                    did_zeroing = false;
830 
831         ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
832         ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL));
833         ASSERT(S_ISREG(inode->i_mode));
834         ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET|
835                 ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0);
836 
837         oldsize = inode->i_size;
838         newsize = iattr->ia_size;
839 
840         /*
841          * Short circuit the truncate case for zero length files.
842          */
843         if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) {
844                 if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME)))
845                         return 0;
846 
847                 /*
848                  * Use the regular setattr path to update the timestamps.
849                  */
850                 iattr->ia_valid &= ~ATTR_SIZE;
851                 return xfs_setattr_nonsize(ip, iattr, 0);
852         }
853 
854         /*
855          * Make sure that the dquots are attached to the inode.
856          */
857         error = xfs_qm_dqattach(ip, 0);
858         if (error)
859                 return error;
860 
861         /*
862          * Wait for all direct I/O to complete.
863          */
864         inode_dio_wait(inode);
865 
866         /*
867          * File data changes must be complete before we start the transaction to
868          * modify the inode.  This needs to be done before joining the inode to
869          * the transaction because the inode cannot be unlocked once it is a
870          * part of the transaction.
871          *
872          * Start with zeroing any data beyond EOF that we may expose on file
873          * extension, or zeroing out the rest of the block on a downward
874          * truncate.
875          */
876         if (newsize > oldsize) {
877                 error = xfs_zero_eof(ip, newsize, oldsize, &did_zeroing);
878         } else {
879                 error = iomap_truncate_page(inode, newsize, &did_zeroing,
880                                 &xfs_iomap_ops);
881         }
882 
883         if (error)
884                 return error;
885 
886         /*
887          * We've already locked out new page faults, so now we can safely remove
888          * pages from the page cache knowing they won't get refaulted until we
889          * drop the XFS_MMAP_EXCL lock after the extent manipulations are
890          * complete. The truncate_setsize() call also cleans partial EOF page
891          * PTEs on extending truncates and hence ensures sub-page block size
892          * filesystems are correctly handled, too.
893          *
894          * We have to do all the page cache truncate work outside the
895          * transaction context as the "lock" order is page lock->log space
896          * reservation as defined by extent allocation in the writeback path.
897          * Hence a truncate can fail with ENOMEM from xfs_trans_alloc(), but
898          * having already truncated the in-memory version of the file (i.e. made
899          * user visible changes). There's not much we can do about this, except
900          * to hope that the caller sees ENOMEM and retries the truncate
901          * operation.
902          *
903          * And we update in-core i_size and truncate page cache beyond newsize
904          * before writeback the [di_size, newsize] range, so we're guaranteed
905          * not to write stale data past the new EOF on truncate down.
906          */
907         truncate_setsize(inode, newsize);
908 
909         /*
910          * We are going to log the inode size change in this transaction so
911          * any previous writes that are beyond the on disk EOF and the new
912          * EOF that have not been written out need to be written here.  If we
913          * do not write the data out, we expose ourselves to the null files
914          * problem. Note that this includes any block zeroing we did above;
915          * otherwise those blocks may not be zeroed after a crash.
916          */
917         if (did_zeroing ||
918             (newsize > ip->i_d.di_size && oldsize != ip->i_d.di_size)) {
919                 error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
920                                                 ip->i_d.di_size, newsize - 1);
921                 if (error)
922                         return error;
923         }
924 
925         error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp);
926         if (error)
927                 return error;
928 
929         lock_flags |= XFS_ILOCK_EXCL;
930         xfs_ilock(ip, XFS_ILOCK_EXCL);
931         xfs_trans_ijoin(tp, ip, 0);
932 
933         /*
934          * Only change the c/mtime if we are changing the size or we are
935          * explicitly asked to change it.  This handles the semantic difference
936          * between truncate() and ftruncate() as implemented in the VFS.
937          *
938          * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
939          * special case where we need to update the times despite not having
940          * these flags set.  For all other operations the VFS set these flags
941          * explicitly if it wants a timestamp update.
942          */
943         if (newsize != oldsize &&
944             !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) {
945                 iattr->ia_ctime = iattr->ia_mtime =
946                         current_time(inode);
947                 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
948         }
949 
950         /*
951          * The first thing we do is set the size to new_size permanently on
952          * disk.  This way we don't have to worry about anyone ever being able
953          * to look at the data being freed even in the face of a crash.
954          * What we're getting around here is the case where we free a block, it
955          * is allocated to another file, it is written to, and then we crash.
956          * If the new data gets written to the file but the log buffers
957          * containing the free and reallocation don't, then we'd end up with
958          * garbage in the blocks being freed.  As long as we make the new size
959          * permanent before actually freeing any blocks it doesn't matter if
960          * they get written to.
961          */
962         ip->i_d.di_size = newsize;
963         xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
964 
965         if (newsize <= oldsize) {
966                 error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize);
967                 if (error)
968                         goto out_trans_cancel;
969 
970                 /*
971                  * Truncated "down", so we're removing references to old data
972                  * here - if we delay flushing for a long time, we expose
973                  * ourselves unduly to the notorious NULL files problem.  So,
974                  * we mark this inode and flush it when the file is closed,
975                  * and do not wait the usual (long) time for writeout.
976                  */
977                 xfs_iflags_set(ip, XFS_ITRUNCATED);
978 
979                 /* A truncate down always removes post-EOF blocks. */
980                 xfs_inode_clear_eofblocks_tag(ip);
981         }
982 
983         if (iattr->ia_valid & ATTR_MODE)
984                 xfs_setattr_mode(ip, iattr);
985         if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
986                 xfs_setattr_time(ip, iattr);
987 
988         xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
989 
990         XFS_STATS_INC(mp, xs_ig_attrchg);
991 
992         if (mp->m_flags & XFS_MOUNT_WSYNC)
993                 xfs_trans_set_sync(tp);
994 
995         error = xfs_trans_commit(tp);
996 out_unlock:
997         if (lock_flags)
998                 xfs_iunlock(ip, lock_flags);
999         return error;
1000 
1001 out_trans_cancel:
1002         xfs_trans_cancel(tp);
1003         goto out_unlock;
1004 }
1005 
1006 int
1007 xfs_vn_setattr_size(
1008         struct dentry           *dentry,
1009         struct iattr            *iattr)
1010 {
1011         struct xfs_inode        *ip = XFS_I(d_inode(dentry));
1012         int error;
1013 
1014         trace_xfs_setattr(ip);
1015 
1016         error = xfs_vn_change_ok(dentry, iattr);
1017         if (error)
1018                 return error;
1019         return xfs_setattr_size(ip, iattr);
1020 }
1021 
1022 STATIC int
1023 xfs_vn_setattr(
1024         struct dentry           *dentry,
1025         struct iattr            *iattr)
1026 {
1027         int                     error;
1028 
1029         if (iattr->ia_valid & ATTR_SIZE) {
1030                 struct xfs_inode        *ip = XFS_I(d_inode(dentry));
1031                 uint                    iolock = XFS_IOLOCK_EXCL;
1032 
1033                 error = xfs_break_layouts(d_inode(dentry), &iolock);
1034                 if (error)
1035                         return error;
1036 
1037                 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
1038                 error = xfs_vn_setattr_size(dentry, iattr);
1039                 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL);
1040         } else {
1041                 error = xfs_vn_setattr_nonsize(dentry, iattr);
1042         }
1043 
1044         return error;
1045 }
1046 
1047 STATIC int
1048 xfs_vn_update_time(
1049         struct inode            *inode,
1050         struct timespec         *now,
1051         int                     flags)
1052 {
1053         struct xfs_inode        *ip = XFS_I(inode);
1054         struct xfs_mount        *mp = ip->i_mount;
1055         struct xfs_trans        *tp;
1056         int                     error;
1057 
1058         trace_xfs_update_time(ip);
1059 
1060         error = xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp);
1061         if (error)
1062                 return error;
1063 
1064         xfs_ilock(ip, XFS_ILOCK_EXCL);
1065         if (flags & S_CTIME)
1066                 inode->i_ctime = *now;
1067         if (flags & S_MTIME)
1068                 inode->i_mtime = *now;
1069         if (flags & S_ATIME)
1070                 inode->i_atime = *now;
1071 
1072         xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1073         xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
1074         return xfs_trans_commit(tp);
1075 }
1076 
1077 STATIC int
1078 xfs_vn_fiemap(
1079         struct inode            *inode,
1080         struct fiemap_extent_info *fieinfo,
1081         u64                     start,
1082         u64                     length)
1083 {
1084         int                     error;
1085 
1086         xfs_ilock(XFS_I(inode), XFS_IOLOCK_SHARED);
1087         if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
1088                 fieinfo->fi_flags &= ~FIEMAP_FLAG_XATTR;
1089                 error = iomap_fiemap(inode, fieinfo, start, length,
1090                                 &xfs_xattr_iomap_ops);
1091         } else {
1092                 error = iomap_fiemap(inode, fieinfo, start, length,
1093                                 &xfs_iomap_ops);
1094         }
1095         xfs_iunlock(XFS_I(inode), XFS_IOLOCK_SHARED);
1096 
1097         return error;
1098 }
1099 
1100 STATIC int
1101 xfs_vn_tmpfile(
1102         struct inode    *dir,
1103         struct dentry   *dentry,
1104         umode_t         mode)
1105 {
1106         return xfs_generic_create(dir, dentry, mode, 0, true);
1107 }
1108 
1109 static const struct inode_operations xfs_inode_operations = {
1110         .get_acl                = xfs_get_acl,
1111         .set_acl                = xfs_set_acl,
1112         .getattr                = xfs_vn_getattr,
1113         .setattr                = xfs_vn_setattr,
1114         .listxattr              = xfs_vn_listxattr,
1115         .fiemap                 = xfs_vn_fiemap,
1116         .update_time            = xfs_vn_update_time,
1117 };
1118 
1119 static const struct inode_operations xfs_dir_inode_operations = {
1120         .create                 = xfs_vn_create,
1121         .lookup                 = xfs_vn_lookup,
1122         .link                   = xfs_vn_link,
1123         .unlink                 = xfs_vn_unlink,
1124         .symlink                = xfs_vn_symlink,
1125         .mkdir                  = xfs_vn_mkdir,
1126         /*
1127          * Yes, XFS uses the same method for rmdir and unlink.
1128          *
1129          * There are some subtile differences deeper in the code,
1130          * but we use S_ISDIR to check for those.
1131          */
1132         .rmdir                  = xfs_vn_unlink,
1133         .mknod                  = xfs_vn_mknod,
1134         .rename                 = xfs_vn_rename,
1135         .get_acl                = xfs_get_acl,
1136         .set_acl                = xfs_set_acl,
1137         .getattr                = xfs_vn_getattr,
1138         .setattr                = xfs_vn_setattr,
1139         .listxattr              = xfs_vn_listxattr,
1140         .update_time            = xfs_vn_update_time,
1141         .tmpfile                = xfs_vn_tmpfile,
1142 };
1143 
1144 static const struct inode_operations xfs_dir_ci_inode_operations = {
1145         .create                 = xfs_vn_create,
1146         .lookup                 = xfs_vn_ci_lookup,
1147         .link                   = xfs_vn_link,
1148         .unlink                 = xfs_vn_unlink,
1149         .symlink                = xfs_vn_symlink,
1150         .mkdir                  = xfs_vn_mkdir,
1151         /*
1152          * Yes, XFS uses the same method for rmdir and unlink.
1153          *
1154          * There are some subtile differences deeper in the code,
1155          * but we use S_ISDIR to check for those.
1156          */
1157         .rmdir                  = xfs_vn_unlink,
1158         .mknod                  = xfs_vn_mknod,
1159         .rename                 = xfs_vn_rename,
1160         .get_acl                = xfs_get_acl,
1161         .set_acl                = xfs_set_acl,
1162         .getattr                = xfs_vn_getattr,
1163         .setattr                = xfs_vn_setattr,
1164         .listxattr              = xfs_vn_listxattr,
1165         .update_time            = xfs_vn_update_time,
1166         .tmpfile                = xfs_vn_tmpfile,
1167 };
1168 
1169 static const struct inode_operations xfs_symlink_inode_operations = {
1170         .get_link               = xfs_vn_get_link,
1171         .getattr                = xfs_vn_getattr,
1172         .setattr                = xfs_vn_setattr,
1173         .listxattr              = xfs_vn_listxattr,
1174         .update_time            = xfs_vn_update_time,
1175 };
1176 
1177 static const struct inode_operations xfs_inline_symlink_inode_operations = {
1178         .get_link               = xfs_vn_get_link_inline,
1179         .getattr                = xfs_vn_getattr,
1180         .setattr                = xfs_vn_setattr,
1181         .listxattr              = xfs_vn_listxattr,
1182         .update_time            = xfs_vn_update_time,
1183 };
1184 
1185 STATIC void
1186 xfs_diflags_to_iflags(
1187         struct inode            *inode,
1188         struct xfs_inode        *ip)
1189 {
1190         uint16_t                flags = ip->i_d.di_flags;
1191 
1192         inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC |
1193                             S_NOATIME | S_DAX);
1194 
1195         if (flags & XFS_DIFLAG_IMMUTABLE)
1196                 inode->i_flags |= S_IMMUTABLE;
1197         if (flags & XFS_DIFLAG_APPEND)
1198                 inode->i_flags |= S_APPEND;
1199         if (flags & XFS_DIFLAG_SYNC)
1200                 inode->i_flags |= S_SYNC;
1201         if (flags & XFS_DIFLAG_NOATIME)
1202                 inode->i_flags |= S_NOATIME;
1203         if (S_ISREG(inode->i_mode) &&
1204             ip->i_mount->m_sb.sb_blocksize == PAGE_SIZE &&
1205             !xfs_is_reflink_inode(ip) &&
1206             (ip->i_mount->m_flags & XFS_MOUNT_DAX ||
1207              ip->i_d.di_flags2 & XFS_DIFLAG2_DAX))
1208                 inode->i_flags |= S_DAX;
1209 }
1210 
1211 /*
1212  * Initialize the Linux inode.
1213  *
1214  * When reading existing inodes from disk this is called directly from xfs_iget,
1215  * when creating a new inode it is called from xfs_ialloc after setting up the
1216  * inode. These callers have different criteria for clearing XFS_INEW, so leave
1217  * it up to the caller to deal with unlocking the inode appropriately.
1218  */
1219 void
1220 xfs_setup_inode(
1221         struct xfs_inode        *ip)
1222 {
1223         struct inode            *inode = &ip->i_vnode;
1224         gfp_t                   gfp_mask;
1225 
1226         inode->i_ino = ip->i_ino;
1227         inode->i_state = I_NEW;
1228 
1229         inode_sb_list_add(inode);
1230         /* make the inode look hashed for the writeback code */
1231         hlist_add_fake(&inode->i_hash);
1232 
1233         inode->i_uid    = xfs_uid_to_kuid(ip->i_d.di_uid);
1234         inode->i_gid    = xfs_gid_to_kgid(ip->i_d.di_gid);
1235 
1236         i_size_write(inode, ip->i_d.di_size);
1237         xfs_diflags_to_iflags(inode, ip);
1238 
1239         if (S_ISDIR(inode->i_mode)) {
1240                 lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class);
1241                 ip->d_ops = ip->i_mount->m_dir_inode_ops;
1242         } else {
1243                 ip->d_ops = ip->i_mount->m_nondir_inode_ops;
1244                 lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class);
1245         }
1246 
1247         /*
1248          * Ensure all page cache allocations are done from GFP_NOFS context to
1249          * prevent direct reclaim recursion back into the filesystem and blowing
1250          * stacks or deadlocking.
1251          */
1252         gfp_mask = mapping_gfp_mask(inode->i_mapping);
1253         mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS)));
1254 
1255         /*
1256          * If there is no attribute fork no ACL can exist on this inode,
1257          * and it can't have any file capabilities attached to it either.
1258          */
1259         if (!XFS_IFORK_Q(ip)) {
1260                 inode_has_no_xattr(inode);
1261                 cache_no_acl(inode);
1262         }
1263 }
1264 
1265 void
1266 xfs_setup_iops(
1267         struct xfs_inode        *ip)
1268 {
1269         struct inode            *inode = &ip->i_vnode;
1270 
1271         switch (inode->i_mode & S_IFMT) {
1272         case S_IFREG:
1273                 inode->i_op = &xfs_inode_operations;
1274                 inode->i_fop = &xfs_file_operations;
1275                 inode->i_mapping->a_ops = &xfs_address_space_operations;
1276                 break;
1277         case S_IFDIR:
1278                 if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
1279                         inode->i_op = &xfs_dir_ci_inode_operations;
1280                 else
1281                         inode->i_op = &xfs_dir_inode_operations;
1282                 inode->i_fop = &xfs_dir_file_operations;
1283                 break;
1284         case S_IFLNK:
1285                 if (ip->i_df.if_flags & XFS_IFINLINE)
1286                         inode->i_op = &xfs_inline_symlink_inode_operations;
1287                 else
1288                         inode->i_op = &xfs_symlink_inode_operations;
1289                 break;
1290         default:
1291                 inode->i_op = &xfs_inode_operations;
1292                 init_special_inode(inode, inode->i_mode, inode->i_rdev);
1293                 break;
1294         }
1295 }
1296 

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