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 = NULL, *ofid = NULL, *inode_fid = NULL;
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);
303 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
306 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
308 err = PTR_ERR(inode);
309 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err);
312 /* Now set the ACL based on the default value */
313 v9fs_set_create_acl(inode, fid, dacl, pacl);
315 v9fs_fid_add(dentry, &fid);
316 d_instantiate(dentry, inode);
318 v9inode = V9FS_I(inode);
319 mutex_lock(&v9inode->v_mutex);
320 if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) &&
321 !v9inode->writeback_fid &&
322 ((flags & O_ACCMODE) != O_RDONLY)) {
324 * clone a fid and add it to writeback_fid
325 * we do it during open time instead of
326 * page dirty time via write_begin/page_mkwrite
327 * because we want write after unlink usecase
330 inode_fid = v9fs_writeback_fid(dentry);
331 if (IS_ERR(inode_fid)) {
332 err = PTR_ERR(inode_fid);
333 mutex_unlock(&v9inode->v_mutex);
336 v9inode->writeback_fid = (void *) inode_fid;
338 mutex_unlock(&v9inode->v_mutex);
339 /* Since we are opening a file, assign the open fid to the file */
340 err = finish_open(file, dentry, generic_file_open);
343 file->private_data = ofid;
344 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
345 fscache_use_cookie(v9fs_inode_cookie(v9inode),
346 file->f_mode & FMODE_WRITE);
347 v9fs_open_fid_add(inode, &ofid);
348 file->f_mode |= FMODE_CREATED;
353 v9fs_put_acl(dacl, pacl);
359 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
360 * @mnt_userns: The user namespace of the mount
361 * @dir: inode that is being unlinked
362 * @dentry: dentry that is being unlinked
363 * @omode: mode for new directory
367 static int v9fs_vfs_mkdir_dotl(struct user_namespace *mnt_userns,
368 struct inode *dir, struct dentry *dentry,
372 struct v9fs_session_info *v9ses;
373 struct p9_fid *fid = NULL, *dfid = NULL;
375 const unsigned char *name;
379 struct posix_acl *dacl = NULL, *pacl = NULL;
381 p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
383 v9ses = v9fs_inode2v9ses(dir);
386 if (dir->i_mode & S_ISGID)
389 dfid = v9fs_parent_fid(dentry);
392 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
396 gid = v9fs_get_fsgid_for_create(dir);
398 /* Update mode based on ACL value */
399 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
401 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n",
405 name = dentry->d_name.name;
406 err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
409 fid = p9_client_walk(dfid, 1, &name, 1);
412 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
417 /* instantiate inode and assign the unopened fid to the dentry */
418 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
419 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
421 err = PTR_ERR(inode);
422 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
426 v9fs_fid_add(dentry, &fid);
427 v9fs_set_create_acl(inode, fid, dacl, pacl);
428 d_instantiate(dentry, inode);
432 * Not in cached mode. No need to populate
433 * inode with stat. We need to get an inode
434 * so that we can set the acl with dentry
436 inode = v9fs_get_inode(dir->i_sb, mode, 0);
438 err = PTR_ERR(inode);
441 v9fs_set_create_acl(inode, fid, dacl, pacl);
442 d_instantiate(dentry, inode);
445 v9fs_invalidate_inode_attr(dir);
448 v9fs_put_acl(dacl, pacl);
454 v9fs_vfs_getattr_dotl(struct user_namespace *mnt_userns,
455 const struct path *path, struct kstat *stat,
456 u32 request_mask, unsigned int flags)
458 struct dentry *dentry = path->dentry;
459 struct v9fs_session_info *v9ses;
461 struct p9_stat_dotl *st;
463 p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
464 v9ses = v9fs_dentry2v9ses(dentry);
465 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
466 generic_fillattr(&init_user_ns, d_inode(dentry), stat);
469 fid = v9fs_fid_lookup(dentry);
473 /* Ask for all the fields in stat structure. Server will return
474 * whatever it supports
477 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
482 v9fs_stat2inode_dotl(st, d_inode(dentry), 0);
483 generic_fillattr(&init_user_ns, d_inode(dentry), stat);
484 /* Change block size to what the server returned */
485 stat->blksize = st->st_blksize;
494 #define P9_ATTR_MODE (1 << 0)
495 #define P9_ATTR_UID (1 << 1)
496 #define P9_ATTR_GID (1 << 2)
497 #define P9_ATTR_SIZE (1 << 3)
498 #define P9_ATTR_ATIME (1 << 4)
499 #define P9_ATTR_MTIME (1 << 5)
500 #define P9_ATTR_CTIME (1 << 6)
501 #define P9_ATTR_ATIME_SET (1 << 7)
502 #define P9_ATTR_MTIME_SET (1 << 8)
504 struct dotl_iattr_map {
509 static int v9fs_mapped_iattr_valid(int iattr_valid)
512 int p9_iattr_valid = 0;
513 struct dotl_iattr_map dotl_iattr_map[] = {
514 { ATTR_MODE, P9_ATTR_MODE },
515 { ATTR_UID, P9_ATTR_UID },
516 { ATTR_GID, P9_ATTR_GID },
517 { ATTR_SIZE, P9_ATTR_SIZE },
518 { ATTR_ATIME, P9_ATTR_ATIME },
519 { ATTR_MTIME, P9_ATTR_MTIME },
520 { ATTR_CTIME, P9_ATTR_CTIME },
521 { ATTR_ATIME_SET, P9_ATTR_ATIME_SET },
522 { ATTR_MTIME_SET, P9_ATTR_MTIME_SET },
524 for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) {
525 if (iattr_valid & dotl_iattr_map[i].iattr_valid)
526 p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid;
528 return p9_iattr_valid;
532 * v9fs_vfs_setattr_dotl - set file metadata
533 * @mnt_userns: The user namespace of the mount
534 * @dentry: file whose metadata to set
535 * @iattr: metadata assignment structure
539 int v9fs_vfs_setattr_dotl(struct user_namespace *mnt_userns,
540 struct dentry *dentry, struct iattr *iattr)
542 int retval, use_dentry = 0;
543 struct p9_fid *fid = NULL;
544 struct p9_iattr_dotl p9attr = {
548 struct inode *inode = d_inode(dentry);
550 p9_debug(P9_DEBUG_VFS, "\n");
552 retval = setattr_prepare(&init_user_ns, dentry, iattr);
556 p9attr.valid = v9fs_mapped_iattr_valid(iattr->ia_valid);
557 if (iattr->ia_valid & ATTR_MODE)
558 p9attr.mode = iattr->ia_mode;
559 if (iattr->ia_valid & ATTR_UID)
560 p9attr.uid = iattr->ia_uid;
561 if (iattr->ia_valid & ATTR_GID)
562 p9attr.gid = iattr->ia_gid;
563 if (iattr->ia_valid & ATTR_SIZE)
564 p9attr.size = iattr->ia_size;
565 if (iattr->ia_valid & ATTR_ATIME_SET) {
566 p9attr.atime_sec = iattr->ia_atime.tv_sec;
567 p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
569 if (iattr->ia_valid & ATTR_MTIME_SET) {
570 p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
571 p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
574 if (iattr->ia_valid & ATTR_FILE) {
575 fid = iattr->ia_file->private_data;
579 fid = v9fs_fid_lookup(dentry);
585 /* Write all dirty data */
586 if (S_ISREG(inode->i_mode))
587 filemap_write_and_wait(inode->i_mapping);
589 retval = p9_client_setattr(fid, &p9attr);
596 if ((iattr->ia_valid & ATTR_SIZE) &&
597 iattr->ia_size != i_size_read(inode))
598 truncate_setsize(inode, iattr->ia_size);
600 v9fs_invalidate_inode_attr(inode);
601 setattr_copy(&init_user_ns, inode, iattr);
602 mark_inode_dirty(inode);
603 if (iattr->ia_valid & ATTR_MODE) {
604 /* We also want to update ACL when we update mode bits */
605 retval = v9fs_acl_chmod(inode, fid);
619 * v9fs_stat2inode_dotl - populate an inode structure with stat info
620 * @stat: stat structure
621 * @inode: inode to populate
622 * @flags: ctrl flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE)
627 v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode,
631 struct v9fs_inode *v9inode = V9FS_I(inode);
633 if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
634 inode->i_atime.tv_sec = stat->st_atime_sec;
635 inode->i_atime.tv_nsec = stat->st_atime_nsec;
636 inode->i_mtime.tv_sec = stat->st_mtime_sec;
637 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
638 inode->i_ctime.tv_sec = stat->st_ctime_sec;
639 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
640 inode->i_uid = stat->st_uid;
641 inode->i_gid = stat->st_gid;
642 set_nlink(inode, stat->st_nlink);
644 mode = stat->st_mode & S_IALLUGO;
645 mode |= inode->i_mode & ~S_IALLUGO;
646 inode->i_mode = mode;
648 if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE))
649 v9fs_i_size_write(inode, stat->st_size);
650 inode->i_blocks = stat->st_blocks;
652 if (stat->st_result_mask & P9_STATS_ATIME) {
653 inode->i_atime.tv_sec = stat->st_atime_sec;
654 inode->i_atime.tv_nsec = stat->st_atime_nsec;
656 if (stat->st_result_mask & P9_STATS_MTIME) {
657 inode->i_mtime.tv_sec = stat->st_mtime_sec;
658 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
660 if (stat->st_result_mask & P9_STATS_CTIME) {
661 inode->i_ctime.tv_sec = stat->st_ctime_sec;
662 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
664 if (stat->st_result_mask & P9_STATS_UID)
665 inode->i_uid = stat->st_uid;
666 if (stat->st_result_mask & P9_STATS_GID)
667 inode->i_gid = stat->st_gid;
668 if (stat->st_result_mask & P9_STATS_NLINK)
669 set_nlink(inode, stat->st_nlink);
670 if (stat->st_result_mask & P9_STATS_MODE) {
671 mode = stat->st_mode & S_IALLUGO;
672 mode |= inode->i_mode & ~S_IALLUGO;
673 inode->i_mode = mode;
675 if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE) &&
676 stat->st_result_mask & P9_STATS_SIZE)
677 v9fs_i_size_write(inode, stat->st_size);
678 if (stat->st_result_mask & P9_STATS_BLOCKS)
679 inode->i_blocks = stat->st_blocks;
681 if (stat->st_result_mask & P9_STATS_GEN)
682 inode->i_generation = stat->st_gen;
684 /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
685 * because the inode structure does not have fields for them.
687 v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
691 v9fs_vfs_symlink_dotl(struct user_namespace *mnt_userns, struct inode *dir,
692 struct dentry *dentry, const char *symname)
696 const unsigned char *name;
700 struct p9_fid *fid = NULL;
701 struct v9fs_session_info *v9ses;
703 name = dentry->d_name.name;
704 p9_debug(P9_DEBUG_VFS, "%lu,%s,%s\n", dir->i_ino, name, symname);
705 v9ses = v9fs_inode2v9ses(dir);
707 dfid = v9fs_parent_fid(dentry);
710 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
714 gid = v9fs_get_fsgid_for_create(dir);
716 /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
717 err = p9_client_symlink(dfid, name, symname, gid, &qid);
720 p9_debug(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
724 v9fs_invalidate_inode_attr(dir);
725 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
726 /* Now walk from the parent so we can get an unopened fid. */
727 fid = p9_client_walk(dfid, 1, &name, 1);
730 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
735 /* instantiate inode and assign the unopened fid to dentry */
736 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
738 err = PTR_ERR(inode);
739 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
743 v9fs_fid_add(dentry, &fid);
744 d_instantiate(dentry, inode);
747 /* Not in cached mode. No need to populate inode with stat */
748 inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0);
750 err = PTR_ERR(inode);
753 d_instantiate(dentry, inode);
763 * v9fs_vfs_link_dotl - create a hardlink for dotl
764 * @old_dentry: dentry for file to link to
765 * @dir: inode destination for new link
766 * @dentry: dentry for link
771 v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
772 struct dentry *dentry)
775 struct p9_fid *dfid, *oldfid;
776 struct v9fs_session_info *v9ses;
778 p9_debug(P9_DEBUG_VFS, "dir ino: %lu, old_name: %pd, new_name: %pd\n",
779 dir->i_ino, old_dentry, dentry);
781 v9ses = v9fs_inode2v9ses(dir);
782 dfid = v9fs_parent_fid(dentry);
784 return PTR_ERR(dfid);
786 oldfid = v9fs_fid_lookup(old_dentry);
787 if (IS_ERR(oldfid)) {
789 return PTR_ERR(oldfid);
792 err = p9_client_link(dfid, oldfid, dentry->d_name.name);
797 p9_debug(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
801 v9fs_invalidate_inode_attr(dir);
802 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
803 /* Get the latest stat info from server. */
806 fid = v9fs_fid_lookup(old_dentry);
810 v9fs_refresh_inode_dotl(fid, d_inode(old_dentry));
813 ihold(d_inode(old_dentry));
814 d_instantiate(dentry, d_inode(old_dentry));
820 * v9fs_vfs_mknod_dotl - create a special file
821 * @mnt_userns: The user namespace of the mount
822 * @dir: inode destination for new link
823 * @dentry: dentry for file
824 * @omode: mode for creation
825 * @rdev: device associated with special file
829 v9fs_vfs_mknod_dotl(struct user_namespace *mnt_userns, struct inode *dir,
830 struct dentry *dentry, umode_t omode, dev_t rdev)
834 const unsigned char *name;
836 struct v9fs_session_info *v9ses;
837 struct p9_fid *fid = NULL, *dfid = NULL;
840 struct posix_acl *dacl = NULL, *pacl = NULL;
842 p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n",
843 dir->i_ino, dentry, omode,
844 MAJOR(rdev), MINOR(rdev));
846 v9ses = v9fs_inode2v9ses(dir);
847 dfid = v9fs_parent_fid(dentry);
850 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
854 gid = v9fs_get_fsgid_for_create(dir);
856 /* Update mode based on ACL value */
857 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
859 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mknod %d\n",
863 name = dentry->d_name.name;
865 err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
869 v9fs_invalidate_inode_attr(dir);
870 fid = p9_client_walk(dfid, 1, &name, 1);
873 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
878 /* instantiate inode and assign the unopened fid to the dentry */
879 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
880 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
882 err = PTR_ERR(inode);
883 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
887 v9fs_set_create_acl(inode, fid, dacl, pacl);
888 v9fs_fid_add(dentry, &fid);
889 d_instantiate(dentry, inode);
893 * Not in cached mode. No need to populate inode with stat.
894 * socket syscall returns a fd, so we need instantiate
896 inode = v9fs_get_inode(dir->i_sb, mode, rdev);
898 err = PTR_ERR(inode);
901 v9fs_set_create_acl(inode, fid, dacl, pacl);
902 d_instantiate(dentry, inode);
906 v9fs_put_acl(dacl, pacl);
913 * v9fs_vfs_get_link_dotl - follow a symlink path
914 * @dentry: dentry for symlink
915 * @inode: inode for symlink
916 * @done: destructor for return value
920 v9fs_vfs_get_link_dotl(struct dentry *dentry,
922 struct delayed_call *done)
929 return ERR_PTR(-ECHILD);
931 p9_debug(P9_DEBUG_VFS, "%pd\n", dentry);
933 fid = v9fs_fid_lookup(dentry);
935 return ERR_CAST(fid);
936 retval = p9_client_readlink(fid, &target);
939 return ERR_PTR(retval);
940 set_delayed_call(done, kfree_link, target);
944 int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
946 struct p9_stat_dotl *st;
947 struct v9fs_session_info *v9ses;
950 v9ses = v9fs_inode2v9ses(inode);
951 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
955 * Don't update inode if the file type is different
957 if (inode_wrong_type(inode, st->st_mode))
961 * We don't want to refresh inode->i_size,
962 * because we may have cached data
964 flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ?
965 V9FS_STAT2INODE_KEEP_ISIZE : 0;
966 v9fs_stat2inode_dotl(st, inode, flags);
972 const struct inode_operations v9fs_dir_inode_operations_dotl = {
973 .create = v9fs_vfs_create_dotl,
974 .atomic_open = v9fs_vfs_atomic_open_dotl,
975 .lookup = v9fs_vfs_lookup,
976 .link = v9fs_vfs_link_dotl,
977 .symlink = v9fs_vfs_symlink_dotl,
978 .unlink = v9fs_vfs_unlink,
979 .mkdir = v9fs_vfs_mkdir_dotl,
980 .rmdir = v9fs_vfs_rmdir,
981 .mknod = v9fs_vfs_mknod_dotl,
982 .rename = v9fs_vfs_rename,
983 .getattr = v9fs_vfs_getattr_dotl,
984 .setattr = v9fs_vfs_setattr_dotl,
985 .listxattr = v9fs_listxattr,
986 .get_acl = v9fs_iop_get_acl,
989 const struct inode_operations v9fs_file_inode_operations_dotl = {
990 .getattr = v9fs_vfs_getattr_dotl,
991 .setattr = v9fs_vfs_setattr_dotl,
992 .listxattr = v9fs_listxattr,
993 .get_acl = v9fs_iop_get_acl,
996 const struct inode_operations v9fs_symlink_inode_operations_dotl = {
997 .get_link = v9fs_vfs_get_link_dotl,
998 .getattr = v9fs_vfs_getattr_dotl,
999 .setattr = v9fs_vfs_setattr_dotl,
1000 .listxattr = v9fs_listxattr,