1 // SPDX-License-Identifier: GPL-2.0-only
3 * This file contains vfs inode ops for the 9P2000.L protocol.
5 * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
6 * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
9 #include <linux/module.h>
10 #include <linux/errno.h>
12 #include <linux/file.h>
13 #include <linux/pagemap.h>
14 #include <linux/stat.h>
15 #include <linux/string.h>
16 #include <linux/inet.h>
17 #include <linux/namei.h>
18 #include <linux/idr.h>
19 #include <linux/sched.h>
20 #include <linux/slab.h>
21 #include <linux/xattr.h>
22 #include <linux/posix_acl.h>
23 #include <net/9p/9p.h>
24 #include <net/9p/client.h>
34 v9fs_vfs_mknod_dotl(struct user_namespace *mnt_userns, struct inode *dir,
35 struct dentry *dentry, umode_t omode, dev_t rdev);
38 * v9fs_get_fsgid_for_create - Helper function to get the gid for a new object
39 * @dir_inode: The directory inode
41 * Helper function to get the gid for creating a
42 * new file system object. This checks the S_ISGID to determine the owning
43 * group of the new file system object.
46 static kgid_t v9fs_get_fsgid_for_create(struct inode *dir_inode)
48 BUG_ON(dir_inode == NULL);
50 if (dir_inode->i_mode & S_ISGID) {
51 /* set_gid bit is set.*/
52 return dir_inode->i_gid;
54 return current_fsgid();
57 static int v9fs_test_inode_dotl(struct inode *inode, void *data)
59 struct v9fs_inode *v9inode = V9FS_I(inode);
60 struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
62 /* don't match inode of different type */
63 if (inode_wrong_type(inode, st->st_mode))
66 if (inode->i_generation != st->st_gen)
69 /* compare qid details */
70 if (memcmp(&v9inode->qid.version,
71 &st->qid.version, sizeof(v9inode->qid.version)))
74 if (v9inode->qid.type != st->qid.type)
77 if (v9inode->qid.path != st->qid.path)
82 /* Always get a new inode */
83 static int v9fs_test_new_inode_dotl(struct inode *inode, void *data)
88 static int v9fs_set_inode_dotl(struct inode *inode, void *data)
90 struct v9fs_inode *v9inode = V9FS_I(inode);
91 struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
93 memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
94 inode->i_generation = st->st_gen;
98 static struct inode *v9fs_qid_iget_dotl(struct super_block *sb,
101 struct p9_stat_dotl *st,
107 struct v9fs_session_info *v9ses = sb->s_fs_info;
108 int (*test)(struct inode *inode, void *data);
111 test = v9fs_test_new_inode_dotl;
113 test = v9fs_test_inode_dotl;
115 i_ino = v9fs_qid2ino(qid);
116 inode = iget5_locked(sb, i_ino, test, v9fs_set_inode_dotl, st);
118 return ERR_PTR(-ENOMEM);
119 if (!(inode->i_state & I_NEW))
122 * initialize the inode with the stat info
123 * FIXME!! we may need support for stale inodes
126 inode->i_ino = i_ino;
127 retval = v9fs_init_inode(v9ses, inode,
128 st->st_mode, new_decode_dev(st->st_rdev));
132 v9fs_stat2inode_dotl(st, inode, 0);
133 v9fs_cache_inode_get_cookie(inode);
134 retval = v9fs_get_acl(inode, fid);
138 unlock_new_inode(inode);
142 return ERR_PTR(retval);
147 v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
148 struct super_block *sb, int new)
150 struct p9_stat_dotl *st;
151 struct inode *inode = NULL;
153 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN);
157 inode = v9fs_qid_iget_dotl(sb, &st->qid, fid, st, new);
162 struct dotl_openflag_map {
167 static int v9fs_mapped_dotl_flags(int flags)
171 struct dotl_openflag_map dotl_oflag_map[] = {
172 { O_CREAT, P9_DOTL_CREATE },
173 { O_EXCL, P9_DOTL_EXCL },
174 { O_NOCTTY, P9_DOTL_NOCTTY },
175 { O_APPEND, P9_DOTL_APPEND },
176 { O_NONBLOCK, P9_DOTL_NONBLOCK },
177 { O_DSYNC, P9_DOTL_DSYNC },
178 { FASYNC, P9_DOTL_FASYNC },
179 { O_DIRECT, P9_DOTL_DIRECT },
180 { O_LARGEFILE, P9_DOTL_LARGEFILE },
181 { O_DIRECTORY, P9_DOTL_DIRECTORY },
182 { O_NOFOLLOW, P9_DOTL_NOFOLLOW },
183 { O_NOATIME, P9_DOTL_NOATIME },
184 { O_CLOEXEC, P9_DOTL_CLOEXEC },
185 { O_SYNC, P9_DOTL_SYNC},
187 for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) {
188 if (flags & dotl_oflag_map[i].open_flag)
189 rflags |= dotl_oflag_map[i].dotl_flag;
195 * v9fs_open_to_dotl_flags- convert Linux specific open flags to
197 * @flags: flags to convert
199 int v9fs_open_to_dotl_flags(int flags)
204 * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY
205 * and P9_DOTL_NOACCESS
207 rflags |= flags & O_ACCMODE;
208 rflags |= v9fs_mapped_dotl_flags(flags);
214 * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
215 * @mnt_userns: The user namespace of the mount
216 * @dir: directory inode that is being created
217 * @dentry: dentry that is being deleted
218 * @omode: create permissions
219 * @excl: True if the file must not yet exist
223 v9fs_vfs_create_dotl(struct user_namespace *mnt_userns, struct inode *dir,
224 struct dentry *dentry, umode_t omode, bool excl)
226 return v9fs_vfs_mknod_dotl(mnt_userns, dir, dentry, omode, 0);
230 v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
231 struct file *file, unsigned int flags, umode_t omode)
236 const unsigned char *name = NULL;
239 struct p9_fid *fid = NULL;
240 struct v9fs_inode *v9inode;
241 struct p9_fid *dfid, *ofid, *inode_fid;
242 struct v9fs_session_info *v9ses;
243 struct posix_acl *pacl = NULL, *dacl = NULL;
244 struct dentry *res = NULL;
246 if (d_in_lookup(dentry)) {
247 res = v9fs_vfs_lookup(dir, dentry, 0);
256 if (!(flags & O_CREAT) || d_really_is_positive(dentry))
257 return finish_no_open(file, res);
259 v9ses = v9fs_inode2v9ses(dir);
261 name = dentry->d_name.name;
262 p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%x\n",
265 dfid = v9fs_parent_fid(dentry);
268 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
272 /* clone a fid to use for creation */
273 ofid = clone_fid(dfid);
276 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
280 gid = v9fs_get_fsgid_for_create(dir);
283 /* Update mode based on ACL value */
284 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
286 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in creat %d\n",
290 err = p9_client_create_dotl(ofid, name, v9fs_open_to_dotl_flags(flags),
293 p9_debug(P9_DEBUG_VFS, "p9_client_open_dotl failed in creat %d\n",
297 v9fs_invalidate_inode_attr(dir);
299 /* instantiate inode and assign the unopened fid to the dentry */
300 fid = p9_client_walk(dfid, 1, &name, 1);
301 p9_client_clunk(dfid);
304 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
308 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
310 err = PTR_ERR(inode);
311 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err);
314 /* Now set the ACL based on the default value */
315 v9fs_set_create_acl(inode, fid, dacl, pacl);
317 v9fs_fid_add(dentry, fid);
318 d_instantiate(dentry, inode);
320 v9inode = V9FS_I(inode);
321 mutex_lock(&v9inode->v_mutex);
322 if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) &&
323 !v9inode->writeback_fid &&
324 ((flags & O_ACCMODE) != O_RDONLY)) {
326 * clone a fid and add it to writeback_fid
327 * we do it during open time instead of
328 * page dirty time via write_begin/page_mkwrite
329 * because we want write after unlink usecase
332 inode_fid = v9fs_writeback_fid(dentry);
333 if (IS_ERR(inode_fid)) {
334 err = PTR_ERR(inode_fid);
335 mutex_unlock(&v9inode->v_mutex);
336 goto err_clunk_old_fid;
338 v9inode->writeback_fid = (void *) inode_fid;
340 mutex_unlock(&v9inode->v_mutex);
341 /* Since we are opening a file, assign the open fid to the file */
342 err = finish_open(file, dentry, generic_file_open);
344 goto err_clunk_old_fid;
345 file->private_data = ofid;
346 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
347 fscache_use_cookie(v9fs_inode_cookie(v9inode),
348 file->f_mode & FMODE_WRITE);
349 v9fs_open_fid_add(inode, ofid);
350 file->f_mode |= FMODE_CREATED;
352 v9fs_put_acl(dacl, pacl);
358 p9_client_clunk(fid);
361 p9_client_clunk(ofid);
366 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
367 * @mnt_userns: The user namespace of the mount
368 * @dir: inode that is being unlinked
369 * @dentry: dentry that is being unlinked
370 * @omode: mode for new directory
374 static int v9fs_vfs_mkdir_dotl(struct user_namespace *mnt_userns,
375 struct inode *dir, struct dentry *dentry,
379 struct v9fs_session_info *v9ses;
380 struct p9_fid *fid = NULL, *dfid = NULL;
382 const unsigned char *name;
386 struct posix_acl *dacl = NULL, *pacl = NULL;
388 p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
390 v9ses = v9fs_inode2v9ses(dir);
393 if (dir->i_mode & S_ISGID)
396 dfid = v9fs_parent_fid(dentry);
399 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
404 gid = v9fs_get_fsgid_for_create(dir);
406 /* Update mode based on ACL value */
407 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
409 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n",
413 name = dentry->d_name.name;
414 err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
417 fid = p9_client_walk(dfid, 1, &name, 1);
420 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
426 /* instantiate inode and assign the unopened fid to the dentry */
427 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
428 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
430 err = PTR_ERR(inode);
431 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
435 v9fs_fid_add(dentry, fid);
436 v9fs_set_create_acl(inode, fid, dacl, pacl);
437 d_instantiate(dentry, inode);
442 * Not in cached mode. No need to populate
443 * inode with stat. We need to get an inode
444 * so that we can set the acl with dentry
446 inode = v9fs_get_inode(dir->i_sb, mode, 0);
448 err = PTR_ERR(inode);
451 v9fs_set_create_acl(inode, fid, dacl, pacl);
452 d_instantiate(dentry, inode);
455 v9fs_invalidate_inode_attr(dir);
458 p9_client_clunk(fid);
459 v9fs_put_acl(dacl, pacl);
460 p9_client_clunk(dfid);
465 v9fs_vfs_getattr_dotl(struct user_namespace *mnt_userns,
466 const struct path *path, struct kstat *stat,
467 u32 request_mask, unsigned int flags)
469 struct dentry *dentry = path->dentry;
470 struct v9fs_session_info *v9ses;
472 struct p9_stat_dotl *st;
474 p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
475 v9ses = v9fs_dentry2v9ses(dentry);
476 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
477 generic_fillattr(&init_user_ns, d_inode(dentry), stat);
480 fid = v9fs_fid_lookup(dentry);
484 /* Ask for all the fields in stat structure. Server will return
485 * whatever it supports
488 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
489 p9_client_clunk(fid);
493 v9fs_stat2inode_dotl(st, d_inode(dentry), 0);
494 generic_fillattr(&init_user_ns, d_inode(dentry), stat);
495 /* Change block size to what the server returned */
496 stat->blksize = st->st_blksize;
505 #define P9_ATTR_MODE (1 << 0)
506 #define P9_ATTR_UID (1 << 1)
507 #define P9_ATTR_GID (1 << 2)
508 #define P9_ATTR_SIZE (1 << 3)
509 #define P9_ATTR_ATIME (1 << 4)
510 #define P9_ATTR_MTIME (1 << 5)
511 #define P9_ATTR_CTIME (1 << 6)
512 #define P9_ATTR_ATIME_SET (1 << 7)
513 #define P9_ATTR_MTIME_SET (1 << 8)
515 struct dotl_iattr_map {
520 static int v9fs_mapped_iattr_valid(int iattr_valid)
523 int p9_iattr_valid = 0;
524 struct dotl_iattr_map dotl_iattr_map[] = {
525 { ATTR_MODE, P9_ATTR_MODE },
526 { ATTR_UID, P9_ATTR_UID },
527 { ATTR_GID, P9_ATTR_GID },
528 { ATTR_SIZE, P9_ATTR_SIZE },
529 { ATTR_ATIME, P9_ATTR_ATIME },
530 { ATTR_MTIME, P9_ATTR_MTIME },
531 { ATTR_CTIME, P9_ATTR_CTIME },
532 { ATTR_ATIME_SET, P9_ATTR_ATIME_SET },
533 { ATTR_MTIME_SET, P9_ATTR_MTIME_SET },
535 for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) {
536 if (iattr_valid & dotl_iattr_map[i].iattr_valid)
537 p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid;
539 return p9_iattr_valid;
543 * v9fs_vfs_setattr_dotl - set file metadata
544 * @mnt_userns: The user namespace of the mount
545 * @dentry: file whose metadata to set
546 * @iattr: metadata assignment structure
550 int v9fs_vfs_setattr_dotl(struct user_namespace *mnt_userns,
551 struct dentry *dentry, struct iattr *iattr)
553 int retval, use_dentry = 0;
554 struct p9_fid *fid = NULL;
555 struct p9_iattr_dotl p9attr = {
559 struct inode *inode = d_inode(dentry);
561 p9_debug(P9_DEBUG_VFS, "\n");
563 retval = setattr_prepare(&init_user_ns, dentry, iattr);
567 p9attr.valid = v9fs_mapped_iattr_valid(iattr->ia_valid);
568 if (iattr->ia_valid & ATTR_MODE)
569 p9attr.mode = iattr->ia_mode;
570 if (iattr->ia_valid & ATTR_UID)
571 p9attr.uid = iattr->ia_uid;
572 if (iattr->ia_valid & ATTR_GID)
573 p9attr.gid = iattr->ia_gid;
574 if (iattr->ia_valid & ATTR_SIZE)
575 p9attr.size = iattr->ia_size;
576 if (iattr->ia_valid & ATTR_ATIME_SET) {
577 p9attr.atime_sec = iattr->ia_atime.tv_sec;
578 p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
580 if (iattr->ia_valid & ATTR_MTIME_SET) {
581 p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
582 p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
585 if (iattr->ia_valid & ATTR_FILE) {
586 fid = iattr->ia_file->private_data;
590 fid = v9fs_fid_lookup(dentry);
596 /* Write all dirty data */
597 if (S_ISREG(inode->i_mode))
598 filemap_write_and_wait(inode->i_mapping);
600 retval = p9_client_setattr(fid, &p9attr);
603 p9_client_clunk(fid);
607 if ((iattr->ia_valid & ATTR_SIZE) &&
608 iattr->ia_size != i_size_read(inode))
609 truncate_setsize(inode, iattr->ia_size);
611 v9fs_invalidate_inode_attr(inode);
612 setattr_copy(&init_user_ns, inode, iattr);
613 mark_inode_dirty(inode);
614 if (iattr->ia_valid & ATTR_MODE) {
615 /* We also want to update ACL when we update mode bits */
616 retval = v9fs_acl_chmod(inode, fid);
619 p9_client_clunk(fid);
624 p9_client_clunk(fid);
630 * v9fs_stat2inode_dotl - populate an inode structure with stat info
631 * @stat: stat structure
632 * @inode: inode to populate
633 * @flags: ctrl flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE)
638 v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode,
642 struct v9fs_inode *v9inode = V9FS_I(inode);
644 if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
645 inode->i_atime.tv_sec = stat->st_atime_sec;
646 inode->i_atime.tv_nsec = stat->st_atime_nsec;
647 inode->i_mtime.tv_sec = stat->st_mtime_sec;
648 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
649 inode->i_ctime.tv_sec = stat->st_ctime_sec;
650 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
651 inode->i_uid = stat->st_uid;
652 inode->i_gid = stat->st_gid;
653 set_nlink(inode, stat->st_nlink);
655 mode = stat->st_mode & S_IALLUGO;
656 mode |= inode->i_mode & ~S_IALLUGO;
657 inode->i_mode = mode;
659 if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE))
660 v9fs_i_size_write(inode, stat->st_size);
661 inode->i_blocks = stat->st_blocks;
663 if (stat->st_result_mask & P9_STATS_ATIME) {
664 inode->i_atime.tv_sec = stat->st_atime_sec;
665 inode->i_atime.tv_nsec = stat->st_atime_nsec;
667 if (stat->st_result_mask & P9_STATS_MTIME) {
668 inode->i_mtime.tv_sec = stat->st_mtime_sec;
669 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
671 if (stat->st_result_mask & P9_STATS_CTIME) {
672 inode->i_ctime.tv_sec = stat->st_ctime_sec;
673 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
675 if (stat->st_result_mask & P9_STATS_UID)
676 inode->i_uid = stat->st_uid;
677 if (stat->st_result_mask & P9_STATS_GID)
678 inode->i_gid = stat->st_gid;
679 if (stat->st_result_mask & P9_STATS_NLINK)
680 set_nlink(inode, stat->st_nlink);
681 if (stat->st_result_mask & P9_STATS_MODE) {
682 mode = stat->st_mode & S_IALLUGO;
683 mode |= inode->i_mode & ~S_IALLUGO;
684 inode->i_mode = mode;
686 if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE) &&
687 stat->st_result_mask & P9_STATS_SIZE)
688 v9fs_i_size_write(inode, stat->st_size);
689 if (stat->st_result_mask & P9_STATS_BLOCKS)
690 inode->i_blocks = stat->st_blocks;
692 if (stat->st_result_mask & P9_STATS_GEN)
693 inode->i_generation = stat->st_gen;
695 /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
696 * because the inode structure does not have fields for them.
698 v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
702 v9fs_vfs_symlink_dotl(struct user_namespace *mnt_userns, struct inode *dir,
703 struct dentry *dentry, const char *symname)
707 const unsigned char *name;
711 struct p9_fid *fid = NULL;
712 struct v9fs_session_info *v9ses;
714 name = dentry->d_name.name;
715 p9_debug(P9_DEBUG_VFS, "%lu,%s,%s\n", dir->i_ino, name, symname);
716 v9ses = v9fs_inode2v9ses(dir);
718 dfid = v9fs_parent_fid(dentry);
721 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
725 gid = v9fs_get_fsgid_for_create(dir);
727 /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
728 err = p9_client_symlink(dfid, name, symname, gid, &qid);
731 p9_debug(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
735 v9fs_invalidate_inode_attr(dir);
736 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
737 /* Now walk from the parent so we can get an unopened fid. */
738 fid = p9_client_walk(dfid, 1, &name, 1);
741 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
747 /* instantiate inode and assign the unopened fid to dentry */
748 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
750 err = PTR_ERR(inode);
751 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
755 v9fs_fid_add(dentry, fid);
756 d_instantiate(dentry, inode);
760 /* Not in cached mode. No need to populate inode with stat */
761 inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0);
763 err = PTR_ERR(inode);
766 d_instantiate(dentry, inode);
771 p9_client_clunk(fid);
773 p9_client_clunk(dfid);
778 * v9fs_vfs_link_dotl - create a hardlink for dotl
779 * @old_dentry: dentry for file to link to
780 * @dir: inode destination for new link
781 * @dentry: dentry for link
786 v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
787 struct dentry *dentry)
790 struct p9_fid *dfid, *oldfid;
791 struct v9fs_session_info *v9ses;
793 p9_debug(P9_DEBUG_VFS, "dir ino: %lu, old_name: %pd, new_name: %pd\n",
794 dir->i_ino, old_dentry, dentry);
796 v9ses = v9fs_inode2v9ses(dir);
797 dfid = v9fs_parent_fid(dentry);
799 return PTR_ERR(dfid);
801 oldfid = v9fs_fid_lookup(old_dentry);
802 if (IS_ERR(oldfid)) {
803 p9_client_clunk(dfid);
804 return PTR_ERR(oldfid);
807 err = p9_client_link(dfid, oldfid, dentry->d_name.name);
809 p9_client_clunk(dfid);
810 p9_client_clunk(oldfid);
812 p9_debug(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
816 v9fs_invalidate_inode_attr(dir);
817 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
818 /* Get the latest stat info from server. */
821 fid = v9fs_fid_lookup(old_dentry);
825 v9fs_refresh_inode_dotl(fid, d_inode(old_dentry));
826 p9_client_clunk(fid);
828 ihold(d_inode(old_dentry));
829 d_instantiate(dentry, d_inode(old_dentry));
835 * v9fs_vfs_mknod_dotl - create a special file
836 * @mnt_userns: The user namespace of the mount
837 * @dir: inode destination for new link
838 * @dentry: dentry for file
839 * @omode: mode for creation
840 * @rdev: device associated with special file
844 v9fs_vfs_mknod_dotl(struct user_namespace *mnt_userns, struct inode *dir,
845 struct dentry *dentry, umode_t omode, dev_t rdev)
849 const unsigned char *name;
851 struct v9fs_session_info *v9ses;
852 struct p9_fid *fid = NULL, *dfid = NULL;
855 struct posix_acl *dacl = NULL, *pacl = NULL;
857 p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n",
858 dir->i_ino, dentry, omode,
859 MAJOR(rdev), MINOR(rdev));
861 v9ses = v9fs_inode2v9ses(dir);
862 dfid = v9fs_parent_fid(dentry);
865 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
870 gid = v9fs_get_fsgid_for_create(dir);
872 /* Update mode based on ACL value */
873 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
875 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mknod %d\n",
879 name = dentry->d_name.name;
881 err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
885 v9fs_invalidate_inode_attr(dir);
886 fid = p9_client_walk(dfid, 1, &name, 1);
889 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
895 /* instantiate inode and assign the unopened fid to the dentry */
896 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
897 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
899 err = PTR_ERR(inode);
900 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
904 v9fs_set_create_acl(inode, fid, dacl, pacl);
905 v9fs_fid_add(dentry, fid);
906 d_instantiate(dentry, inode);
911 * Not in cached mode. No need to populate inode with stat.
912 * socket syscall returns a fd, so we need instantiate
914 inode = v9fs_get_inode(dir->i_sb, mode, rdev);
916 err = PTR_ERR(inode);
919 v9fs_set_create_acl(inode, fid, dacl, pacl);
920 d_instantiate(dentry, inode);
924 p9_client_clunk(fid);
925 v9fs_put_acl(dacl, pacl);
926 p9_client_clunk(dfid);
932 * v9fs_vfs_get_link_dotl - follow a symlink path
933 * @dentry: dentry for symlink
934 * @inode: inode for symlink
935 * @done: destructor for return value
939 v9fs_vfs_get_link_dotl(struct dentry *dentry,
941 struct delayed_call *done)
948 return ERR_PTR(-ECHILD);
950 p9_debug(P9_DEBUG_VFS, "%pd\n", dentry);
952 fid = v9fs_fid_lookup(dentry);
954 return ERR_CAST(fid);
955 retval = p9_client_readlink(fid, &target);
956 p9_client_clunk(fid);
958 return ERR_PTR(retval);
959 set_delayed_call(done, kfree_link, target);
963 int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
965 struct p9_stat_dotl *st;
966 struct v9fs_session_info *v9ses;
969 v9ses = v9fs_inode2v9ses(inode);
970 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
974 * Don't update inode if the file type is different
976 if (inode_wrong_type(inode, st->st_mode))
980 * We don't want to refresh inode->i_size,
981 * because we may have cached data
983 flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ?
984 V9FS_STAT2INODE_KEEP_ISIZE : 0;
985 v9fs_stat2inode_dotl(st, inode, flags);
991 const struct inode_operations v9fs_dir_inode_operations_dotl = {
992 .create = v9fs_vfs_create_dotl,
993 .atomic_open = v9fs_vfs_atomic_open_dotl,
994 .lookup = v9fs_vfs_lookup,
995 .link = v9fs_vfs_link_dotl,
996 .symlink = v9fs_vfs_symlink_dotl,
997 .unlink = v9fs_vfs_unlink,
998 .mkdir = v9fs_vfs_mkdir_dotl,
999 .rmdir = v9fs_vfs_rmdir,
1000 .mknod = v9fs_vfs_mknod_dotl,
1001 .rename = v9fs_vfs_rename,
1002 .getattr = v9fs_vfs_getattr_dotl,
1003 .setattr = v9fs_vfs_setattr_dotl,
1004 .listxattr = v9fs_listxattr,
1005 .get_acl = v9fs_iop_get_acl,
1008 const struct inode_operations v9fs_file_inode_operations_dotl = {
1009 .getattr = v9fs_vfs_getattr_dotl,
1010 .setattr = v9fs_vfs_setattr_dotl,
1011 .listxattr = v9fs_listxattr,
1012 .get_acl = v9fs_iop_get_acl,
1015 const struct inode_operations v9fs_symlink_inode_operations_dotl = {
1016 .get_link = v9fs_vfs_get_link_dotl,
1017 .getattr = v9fs_vfs_getattr_dotl,
1018 .setattr = v9fs_vfs_setattr_dotl,
1019 .listxattr = v9fs_listxattr,