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/sched.h>
19 #include <linux/slab.h>
20 #include <linux/xattr.h>
21 #include <linux/posix_acl.h>
22 #include <net/9p/9p.h>
23 #include <net/9p/client.h>
33 v9fs_vfs_mknod_dotl(struct user_namespace *mnt_userns, struct inode *dir,
34 struct dentry *dentry, umode_t omode, dev_t rdev);
37 * v9fs_get_fsgid_for_create - Helper function to get the gid for a new object
38 * @dir_inode: The directory inode
40 * Helper function to get the gid for creating a
41 * new file system object. This checks the S_ISGID to determine the owning
42 * group of the new file system object.
45 static kgid_t v9fs_get_fsgid_for_create(struct inode *dir_inode)
47 BUG_ON(dir_inode == NULL);
49 if (dir_inode->i_mode & S_ISGID) {
50 /* set_gid bit is set.*/
51 return dir_inode->i_gid;
53 return current_fsgid();
56 static int v9fs_test_inode_dotl(struct inode *inode, void *data)
58 struct v9fs_inode *v9inode = V9FS_I(inode);
59 struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
61 /* don't match inode of different type */
62 if (inode_wrong_type(inode, st->st_mode))
65 if (inode->i_generation != st->st_gen)
68 /* compare qid details */
69 if (memcmp(&v9inode->qid.version,
70 &st->qid.version, sizeof(v9inode->qid.version)))
73 if (v9inode->qid.type != st->qid.type)
76 if (v9inode->qid.path != st->qid.path)
81 /* Always get a new inode */
82 static int v9fs_test_new_inode_dotl(struct inode *inode, void *data)
87 static int v9fs_set_inode_dotl(struct inode *inode, void *data)
89 struct v9fs_inode *v9inode = V9FS_I(inode);
90 struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
92 memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
93 inode->i_generation = st->st_gen;
97 static struct inode *v9fs_qid_iget_dotl(struct super_block *sb,
100 struct p9_stat_dotl *st,
106 struct v9fs_session_info *v9ses = sb->s_fs_info;
107 int (*test)(struct inode *inode, void *data);
110 test = v9fs_test_new_inode_dotl;
112 test = v9fs_test_inode_dotl;
114 i_ino = v9fs_qid2ino(qid);
115 inode = iget5_locked(sb, i_ino, test, v9fs_set_inode_dotl, st);
117 return ERR_PTR(-ENOMEM);
118 if (!(inode->i_state & I_NEW))
121 * initialize the inode with the stat info
122 * FIXME!! we may need support for stale inodes
125 inode->i_ino = i_ino;
126 retval = v9fs_init_inode(v9ses, inode,
127 st->st_mode, new_decode_dev(st->st_rdev));
131 v9fs_stat2inode_dotl(st, inode, 0);
132 v9fs_cache_inode_get_cookie(inode);
133 retval = v9fs_get_acl(inode, fid);
137 unlock_new_inode(inode);
141 return ERR_PTR(retval);
146 v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
147 struct super_block *sb, int new)
149 struct p9_stat_dotl *st;
150 struct inode *inode = NULL;
152 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN);
156 inode = v9fs_qid_iget_dotl(sb, &st->qid, fid, st, new);
161 struct dotl_openflag_map {
166 static int v9fs_mapped_dotl_flags(int flags)
170 struct dotl_openflag_map dotl_oflag_map[] = {
171 { O_CREAT, P9_DOTL_CREATE },
172 { O_EXCL, P9_DOTL_EXCL },
173 { O_NOCTTY, P9_DOTL_NOCTTY },
174 { O_APPEND, P9_DOTL_APPEND },
175 { O_NONBLOCK, P9_DOTL_NONBLOCK },
176 { O_DSYNC, P9_DOTL_DSYNC },
177 { FASYNC, P9_DOTL_FASYNC },
178 { O_DIRECT, P9_DOTL_DIRECT },
179 { O_LARGEFILE, P9_DOTL_LARGEFILE },
180 { O_DIRECTORY, P9_DOTL_DIRECTORY },
181 { O_NOFOLLOW, P9_DOTL_NOFOLLOW },
182 { O_NOATIME, P9_DOTL_NOATIME },
183 { O_CLOEXEC, P9_DOTL_CLOEXEC },
184 { O_SYNC, P9_DOTL_SYNC},
186 for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) {
187 if (flags & dotl_oflag_map[i].open_flag)
188 rflags |= dotl_oflag_map[i].dotl_flag;
194 * v9fs_open_to_dotl_flags- convert Linux specific open flags to
196 * @flags: flags to convert
198 int v9fs_open_to_dotl_flags(int flags)
203 * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY
204 * and P9_DOTL_NOACCESS
206 rflags |= flags & O_ACCMODE;
207 rflags |= v9fs_mapped_dotl_flags(flags);
213 * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
214 * @mnt_userns: The user namespace of the mount
215 * @dir: directory inode that is being created
216 * @dentry: dentry that is being deleted
217 * @omode: create permissions
218 * @excl: True if the file must not yet exist
222 v9fs_vfs_create_dotl(struct user_namespace *mnt_userns, struct inode *dir,
223 struct dentry *dentry, umode_t omode, bool excl)
225 return v9fs_vfs_mknod_dotl(mnt_userns, dir, dentry, omode, 0);
229 v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
230 struct file *file, unsigned int flags, umode_t omode)
235 const unsigned char *name = NULL;
238 struct p9_fid *fid = NULL;
239 struct v9fs_inode *v9inode;
240 struct p9_fid *dfid = NULL, *ofid = NULL, *inode_fid = NULL;
241 struct v9fs_session_info *v9ses;
242 struct posix_acl *pacl = NULL, *dacl = NULL;
243 struct dentry *res = NULL;
245 if (d_in_lookup(dentry)) {
246 res = v9fs_vfs_lookup(dir, dentry, 0);
255 if (!(flags & O_CREAT) || d_really_is_positive(dentry))
256 return finish_no_open(file, res);
258 v9ses = v9fs_inode2v9ses(dir);
260 name = dentry->d_name.name;
261 p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%x\n",
264 dfid = v9fs_parent_fid(dentry);
267 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
271 /* clone a fid to use for creation */
272 ofid = clone_fid(dfid);
275 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
279 gid = v9fs_get_fsgid_for_create(dir);
282 /* Update mode based on ACL value */
283 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
285 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in creat %d\n",
289 err = p9_client_create_dotl(ofid, name, v9fs_open_to_dotl_flags(flags),
292 p9_debug(P9_DEBUG_VFS, "p9_client_open_dotl failed in creat %d\n",
296 v9fs_invalidate_inode_attr(dir);
298 /* instantiate inode and assign the unopened fid to the dentry */
299 fid = p9_client_walk(dfid, 1, &name, 1);
302 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
305 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
307 err = PTR_ERR(inode);
308 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err);
311 /* Now set the ACL based on the default value */
312 v9fs_set_create_acl(inode, fid, dacl, pacl);
314 v9fs_fid_add(dentry, &fid);
315 d_instantiate(dentry, inode);
317 v9inode = V9FS_I(inode);
318 mutex_lock(&v9inode->v_mutex);
319 if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) &&
320 !v9inode->writeback_fid &&
321 ((flags & O_ACCMODE) != O_RDONLY)) {
323 * clone a fid and add it to writeback_fid
324 * we do it during open time instead of
325 * page dirty time via write_begin/page_mkwrite
326 * because we want write after unlink usecase
329 inode_fid = v9fs_writeback_fid(dentry);
330 if (IS_ERR(inode_fid)) {
331 err = PTR_ERR(inode_fid);
332 mutex_unlock(&v9inode->v_mutex);
335 v9inode->writeback_fid = (void *) inode_fid;
337 mutex_unlock(&v9inode->v_mutex);
338 /* Since we are opening a file, assign the open fid to the file */
339 err = finish_open(file, dentry, generic_file_open);
342 file->private_data = ofid;
343 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
344 fscache_use_cookie(v9fs_inode_cookie(v9inode),
345 file->f_mode & FMODE_WRITE);
346 v9fs_open_fid_add(inode, &ofid);
347 file->f_mode |= FMODE_CREATED;
352 v9fs_put_acl(dacl, pacl);
358 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
359 * @mnt_userns: The user namespace of the mount
360 * @dir: inode that is being unlinked
361 * @dentry: dentry that is being unlinked
362 * @omode: mode for new directory
366 static int v9fs_vfs_mkdir_dotl(struct user_namespace *mnt_userns,
367 struct inode *dir, struct dentry *dentry,
371 struct v9fs_session_info *v9ses;
372 struct p9_fid *fid = NULL, *dfid = NULL;
374 const unsigned char *name;
378 struct posix_acl *dacl = NULL, *pacl = NULL;
380 p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
382 v9ses = v9fs_inode2v9ses(dir);
385 if (dir->i_mode & S_ISGID)
388 dfid = v9fs_parent_fid(dentry);
391 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
395 gid = v9fs_get_fsgid_for_create(dir);
397 /* Update mode based on ACL value */
398 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
400 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n",
404 name = dentry->d_name.name;
405 err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
408 fid = p9_client_walk(dfid, 1, &name, 1);
411 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
416 /* instantiate inode and assign the unopened fid to the dentry */
417 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
418 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
420 err = PTR_ERR(inode);
421 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
425 v9fs_fid_add(dentry, &fid);
426 v9fs_set_create_acl(inode, fid, dacl, pacl);
427 d_instantiate(dentry, inode);
431 * Not in cached mode. No need to populate
432 * inode with stat. We need to get an inode
433 * so that we can set the acl with dentry
435 inode = v9fs_get_inode(dir->i_sb, mode, 0);
437 err = PTR_ERR(inode);
440 v9fs_set_create_acl(inode, fid, dacl, pacl);
441 d_instantiate(dentry, inode);
444 v9fs_invalidate_inode_attr(dir);
447 v9fs_put_acl(dacl, pacl);
453 v9fs_vfs_getattr_dotl(struct user_namespace *mnt_userns,
454 const struct path *path, struct kstat *stat,
455 u32 request_mask, unsigned int flags)
457 struct dentry *dentry = path->dentry;
458 struct v9fs_session_info *v9ses;
460 struct p9_stat_dotl *st;
462 p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
463 v9ses = v9fs_dentry2v9ses(dentry);
464 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
465 generic_fillattr(&init_user_ns, d_inode(dentry), stat);
468 fid = v9fs_fid_lookup(dentry);
472 /* Ask for all the fields in stat structure. Server will return
473 * whatever it supports
476 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
481 v9fs_stat2inode_dotl(st, d_inode(dentry), 0);
482 generic_fillattr(&init_user_ns, d_inode(dentry), stat);
483 /* Change block size to what the server returned */
484 stat->blksize = st->st_blksize;
493 #define P9_ATTR_MODE (1 << 0)
494 #define P9_ATTR_UID (1 << 1)
495 #define P9_ATTR_GID (1 << 2)
496 #define P9_ATTR_SIZE (1 << 3)
497 #define P9_ATTR_ATIME (1 << 4)
498 #define P9_ATTR_MTIME (1 << 5)
499 #define P9_ATTR_CTIME (1 << 6)
500 #define P9_ATTR_ATIME_SET (1 << 7)
501 #define P9_ATTR_MTIME_SET (1 << 8)
503 struct dotl_iattr_map {
508 static int v9fs_mapped_iattr_valid(int iattr_valid)
511 int p9_iattr_valid = 0;
512 struct dotl_iattr_map dotl_iattr_map[] = {
513 { ATTR_MODE, P9_ATTR_MODE },
514 { ATTR_UID, P9_ATTR_UID },
515 { ATTR_GID, P9_ATTR_GID },
516 { ATTR_SIZE, P9_ATTR_SIZE },
517 { ATTR_ATIME, P9_ATTR_ATIME },
518 { ATTR_MTIME, P9_ATTR_MTIME },
519 { ATTR_CTIME, P9_ATTR_CTIME },
520 { ATTR_ATIME_SET, P9_ATTR_ATIME_SET },
521 { ATTR_MTIME_SET, P9_ATTR_MTIME_SET },
523 for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) {
524 if (iattr_valid & dotl_iattr_map[i].iattr_valid)
525 p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid;
527 return p9_iattr_valid;
531 * v9fs_vfs_setattr_dotl - set file metadata
532 * @mnt_userns: The user namespace of the mount
533 * @dentry: file whose metadata to set
534 * @iattr: metadata assignment structure
538 int v9fs_vfs_setattr_dotl(struct user_namespace *mnt_userns,
539 struct dentry *dentry, struct iattr *iattr)
541 int retval, use_dentry = 0;
542 struct p9_fid *fid = NULL;
543 struct p9_iattr_dotl p9attr = {
547 struct inode *inode = d_inode(dentry);
549 p9_debug(P9_DEBUG_VFS, "\n");
551 retval = setattr_prepare(&init_user_ns, dentry, iattr);
555 p9attr.valid = v9fs_mapped_iattr_valid(iattr->ia_valid);
556 if (iattr->ia_valid & ATTR_MODE)
557 p9attr.mode = iattr->ia_mode;
558 if (iattr->ia_valid & ATTR_UID)
559 p9attr.uid = iattr->ia_uid;
560 if (iattr->ia_valid & ATTR_GID)
561 p9attr.gid = iattr->ia_gid;
562 if (iattr->ia_valid & ATTR_SIZE)
563 p9attr.size = iattr->ia_size;
564 if (iattr->ia_valid & ATTR_ATIME_SET) {
565 p9attr.atime_sec = iattr->ia_atime.tv_sec;
566 p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
568 if (iattr->ia_valid & ATTR_MTIME_SET) {
569 p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
570 p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
573 if (iattr->ia_valid & ATTR_FILE) {
574 fid = iattr->ia_file->private_data;
578 fid = v9fs_fid_lookup(dentry);
584 /* Write all dirty data */
585 if (S_ISREG(inode->i_mode))
586 filemap_write_and_wait(inode->i_mapping);
588 retval = p9_client_setattr(fid, &p9attr);
595 if ((iattr->ia_valid & ATTR_SIZE) &&
596 iattr->ia_size != i_size_read(inode))
597 truncate_setsize(inode, iattr->ia_size);
599 v9fs_invalidate_inode_attr(inode);
600 setattr_copy(&init_user_ns, inode, iattr);
601 mark_inode_dirty(inode);
602 if (iattr->ia_valid & ATTR_MODE) {
603 /* We also want to update ACL when we update mode bits */
604 retval = v9fs_acl_chmod(inode, fid);
618 * v9fs_stat2inode_dotl - populate an inode structure with stat info
619 * @stat: stat structure
620 * @inode: inode to populate
621 * @flags: ctrl flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE)
626 v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode,
630 struct v9fs_inode *v9inode = V9FS_I(inode);
632 if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
633 inode->i_atime.tv_sec = stat->st_atime_sec;
634 inode->i_atime.tv_nsec = stat->st_atime_nsec;
635 inode->i_mtime.tv_sec = stat->st_mtime_sec;
636 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
637 inode->i_ctime.tv_sec = stat->st_ctime_sec;
638 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
639 inode->i_uid = stat->st_uid;
640 inode->i_gid = stat->st_gid;
641 set_nlink(inode, stat->st_nlink);
643 mode = stat->st_mode & S_IALLUGO;
644 mode |= inode->i_mode & ~S_IALLUGO;
645 inode->i_mode = mode;
647 if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE))
648 v9fs_i_size_write(inode, stat->st_size);
649 inode->i_blocks = stat->st_blocks;
651 if (stat->st_result_mask & P9_STATS_ATIME) {
652 inode->i_atime.tv_sec = stat->st_atime_sec;
653 inode->i_atime.tv_nsec = stat->st_atime_nsec;
655 if (stat->st_result_mask & P9_STATS_MTIME) {
656 inode->i_mtime.tv_sec = stat->st_mtime_sec;
657 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
659 if (stat->st_result_mask & P9_STATS_CTIME) {
660 inode->i_ctime.tv_sec = stat->st_ctime_sec;
661 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
663 if (stat->st_result_mask & P9_STATS_UID)
664 inode->i_uid = stat->st_uid;
665 if (stat->st_result_mask & P9_STATS_GID)
666 inode->i_gid = stat->st_gid;
667 if (stat->st_result_mask & P9_STATS_NLINK)
668 set_nlink(inode, stat->st_nlink);
669 if (stat->st_result_mask & P9_STATS_MODE) {
670 mode = stat->st_mode & S_IALLUGO;
671 mode |= inode->i_mode & ~S_IALLUGO;
672 inode->i_mode = mode;
674 if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE) &&
675 stat->st_result_mask & P9_STATS_SIZE)
676 v9fs_i_size_write(inode, stat->st_size);
677 if (stat->st_result_mask & P9_STATS_BLOCKS)
678 inode->i_blocks = stat->st_blocks;
680 if (stat->st_result_mask & P9_STATS_GEN)
681 inode->i_generation = stat->st_gen;
683 /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
684 * because the inode structure does not have fields for them.
686 v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
690 v9fs_vfs_symlink_dotl(struct user_namespace *mnt_userns, struct inode *dir,
691 struct dentry *dentry, const char *symname)
695 const unsigned char *name;
699 struct p9_fid *fid = NULL;
700 struct v9fs_session_info *v9ses;
702 name = dentry->d_name.name;
703 p9_debug(P9_DEBUG_VFS, "%lu,%s,%s\n", dir->i_ino, name, symname);
704 v9ses = v9fs_inode2v9ses(dir);
706 dfid = v9fs_parent_fid(dentry);
709 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
713 gid = v9fs_get_fsgid_for_create(dir);
715 /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
716 err = p9_client_symlink(dfid, name, symname, gid, &qid);
719 p9_debug(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
723 v9fs_invalidate_inode_attr(dir);
724 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
725 /* Now walk from the parent so we can get an unopened fid. */
726 fid = p9_client_walk(dfid, 1, &name, 1);
729 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
734 /* instantiate inode and assign the unopened fid to dentry */
735 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
737 err = PTR_ERR(inode);
738 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
742 v9fs_fid_add(dentry, &fid);
743 d_instantiate(dentry, inode);
746 /* Not in cached mode. No need to populate inode with stat */
747 inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0);
749 err = PTR_ERR(inode);
752 d_instantiate(dentry, inode);
762 * v9fs_vfs_link_dotl - create a hardlink for dotl
763 * @old_dentry: dentry for file to link to
764 * @dir: inode destination for new link
765 * @dentry: dentry for link
770 v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
771 struct dentry *dentry)
774 struct p9_fid *dfid, *oldfid;
775 struct v9fs_session_info *v9ses;
777 p9_debug(P9_DEBUG_VFS, "dir ino: %lu, old_name: %pd, new_name: %pd\n",
778 dir->i_ino, old_dentry, dentry);
780 v9ses = v9fs_inode2v9ses(dir);
781 dfid = v9fs_parent_fid(dentry);
783 return PTR_ERR(dfid);
785 oldfid = v9fs_fid_lookup(old_dentry);
786 if (IS_ERR(oldfid)) {
788 return PTR_ERR(oldfid);
791 err = p9_client_link(dfid, oldfid, dentry->d_name.name);
796 p9_debug(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
800 v9fs_invalidate_inode_attr(dir);
801 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
802 /* Get the latest stat info from server. */
805 fid = v9fs_fid_lookup(old_dentry);
809 v9fs_refresh_inode_dotl(fid, d_inode(old_dentry));
812 ihold(d_inode(old_dentry));
813 d_instantiate(dentry, d_inode(old_dentry));
819 * v9fs_vfs_mknod_dotl - create a special file
820 * @mnt_userns: The user namespace of the mount
821 * @dir: inode destination for new link
822 * @dentry: dentry for file
823 * @omode: mode for creation
824 * @rdev: device associated with special file
828 v9fs_vfs_mknod_dotl(struct user_namespace *mnt_userns, struct inode *dir,
829 struct dentry *dentry, umode_t omode, dev_t rdev)
833 const unsigned char *name;
835 struct v9fs_session_info *v9ses;
836 struct p9_fid *fid = NULL, *dfid = NULL;
839 struct posix_acl *dacl = NULL, *pacl = NULL;
841 p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n",
842 dir->i_ino, dentry, omode,
843 MAJOR(rdev), MINOR(rdev));
845 v9ses = v9fs_inode2v9ses(dir);
846 dfid = v9fs_parent_fid(dentry);
849 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
853 gid = v9fs_get_fsgid_for_create(dir);
855 /* Update mode based on ACL value */
856 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
858 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mknod %d\n",
862 name = dentry->d_name.name;
864 err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
868 v9fs_invalidate_inode_attr(dir);
869 fid = p9_client_walk(dfid, 1, &name, 1);
872 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
877 /* instantiate inode and assign the unopened fid to the dentry */
878 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
879 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
881 err = PTR_ERR(inode);
882 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
886 v9fs_set_create_acl(inode, fid, dacl, pacl);
887 v9fs_fid_add(dentry, &fid);
888 d_instantiate(dentry, inode);
892 * Not in cached mode. No need to populate inode with stat.
893 * socket syscall returns a fd, so we need instantiate
895 inode = v9fs_get_inode(dir->i_sb, mode, rdev);
897 err = PTR_ERR(inode);
900 v9fs_set_create_acl(inode, fid, dacl, pacl);
901 d_instantiate(dentry, inode);
905 v9fs_put_acl(dacl, pacl);
912 * v9fs_vfs_get_link_dotl - follow a symlink path
913 * @dentry: dentry for symlink
914 * @inode: inode for symlink
915 * @done: destructor for return value
919 v9fs_vfs_get_link_dotl(struct dentry *dentry,
921 struct delayed_call *done)
928 return ERR_PTR(-ECHILD);
930 p9_debug(P9_DEBUG_VFS, "%pd\n", dentry);
932 fid = v9fs_fid_lookup(dentry);
934 return ERR_CAST(fid);
935 retval = p9_client_readlink(fid, &target);
938 return ERR_PTR(retval);
939 set_delayed_call(done, kfree_link, target);
943 int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
945 struct p9_stat_dotl *st;
946 struct v9fs_session_info *v9ses;
949 v9ses = v9fs_inode2v9ses(inode);
950 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
954 * Don't update inode if the file type is different
956 if (inode_wrong_type(inode, st->st_mode))
960 * We don't want to refresh inode->i_size,
961 * because we may have cached data
963 flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ?
964 V9FS_STAT2INODE_KEEP_ISIZE : 0;
965 v9fs_stat2inode_dotl(st, inode, flags);
971 const struct inode_operations v9fs_dir_inode_operations_dotl = {
972 .create = v9fs_vfs_create_dotl,
973 .atomic_open = v9fs_vfs_atomic_open_dotl,
974 .lookup = v9fs_vfs_lookup,
975 .link = v9fs_vfs_link_dotl,
976 .symlink = v9fs_vfs_symlink_dotl,
977 .unlink = v9fs_vfs_unlink,
978 .mkdir = v9fs_vfs_mkdir_dotl,
979 .rmdir = v9fs_vfs_rmdir,
980 .mknod = v9fs_vfs_mknod_dotl,
981 .rename = v9fs_vfs_rename,
982 .getattr = v9fs_vfs_getattr_dotl,
983 .setattr = v9fs_vfs_setattr_dotl,
984 .listxattr = v9fs_listxattr,
985 .get_inode_acl = v9fs_iop_get_inode_acl,
986 .get_acl = v9fs_iop_get_acl,
987 .set_acl = v9fs_iop_set_acl,
990 const struct inode_operations v9fs_file_inode_operations_dotl = {
991 .getattr = v9fs_vfs_getattr_dotl,
992 .setattr = v9fs_vfs_setattr_dotl,
993 .listxattr = v9fs_listxattr,
994 .get_inode_acl = v9fs_iop_get_inode_acl,
995 .get_acl = v9fs_iop_get_acl,
996 .set_acl = v9fs_iop_set_acl,
999 const struct inode_operations v9fs_symlink_inode_operations_dotl = {
1000 .get_link = v9fs_vfs_get_link_dotl,
1001 .getattr = v9fs_vfs_getattr_dotl,
1002 .setattr = v9fs_vfs_setattr_dotl,
1003 .listxattr = v9fs_listxattr,