1 // SPDX-License-Identifier: GPL-2.0-only
3 * This file contains vfs inode ops for the 9P2000.L protocol.
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 v9fs_cache_inode_set_cookie(inode, file);
348 v9fs_open_fid_add(inode, ofid);
349 file->f_mode |= FMODE_CREATED;
351 v9fs_put_acl(dacl, pacl);
357 p9_client_clunk(fid);
360 p9_client_clunk(ofid);
365 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
366 * @mnt_userns: The user namespace of the mount
367 * @dir: inode that is being unlinked
368 * @dentry: dentry that is being unlinked
369 * @omode: mode for new directory
373 static int v9fs_vfs_mkdir_dotl(struct user_namespace *mnt_userns,
374 struct inode *dir, struct dentry *dentry,
378 struct v9fs_session_info *v9ses;
379 struct p9_fid *fid = NULL, *dfid = NULL;
381 const unsigned char *name;
385 struct posix_acl *dacl = NULL, *pacl = NULL;
387 p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
389 v9ses = v9fs_inode2v9ses(dir);
392 if (dir->i_mode & S_ISGID)
395 dfid = v9fs_parent_fid(dentry);
398 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
403 gid = v9fs_get_fsgid_for_create(dir);
405 /* Update mode based on ACL value */
406 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
408 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n",
412 name = dentry->d_name.name;
413 err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
416 fid = p9_client_walk(dfid, 1, &name, 1);
419 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
425 /* instantiate inode and assign the unopened fid to the dentry */
426 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
427 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
429 err = PTR_ERR(inode);
430 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
434 v9fs_fid_add(dentry, fid);
435 v9fs_set_create_acl(inode, fid, dacl, pacl);
436 d_instantiate(dentry, inode);
441 * Not in cached mode. No need to populate
442 * inode with stat. We need to get an inode
443 * so that we can set the acl with dentry
445 inode = v9fs_get_inode(dir->i_sb, mode, 0);
447 err = PTR_ERR(inode);
450 v9fs_set_create_acl(inode, fid, dacl, pacl);
451 d_instantiate(dentry, inode);
454 v9fs_invalidate_inode_attr(dir);
457 p9_client_clunk(fid);
458 v9fs_put_acl(dacl, pacl);
459 p9_client_clunk(dfid);
464 v9fs_vfs_getattr_dotl(struct user_namespace *mnt_userns,
465 const struct path *path, struct kstat *stat,
466 u32 request_mask, unsigned int flags)
468 struct dentry *dentry = path->dentry;
469 struct v9fs_session_info *v9ses;
471 struct p9_stat_dotl *st;
473 p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
474 v9ses = v9fs_dentry2v9ses(dentry);
475 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
476 generic_fillattr(&init_user_ns, d_inode(dentry), stat);
479 fid = v9fs_fid_lookup(dentry);
483 /* Ask for all the fields in stat structure. Server will return
484 * whatever it supports
487 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
488 p9_client_clunk(fid);
492 v9fs_stat2inode_dotl(st, d_inode(dentry), 0);
493 generic_fillattr(&init_user_ns, d_inode(dentry), stat);
494 /* Change block size to what the server returned */
495 stat->blksize = st->st_blksize;
504 #define P9_ATTR_MODE (1 << 0)
505 #define P9_ATTR_UID (1 << 1)
506 #define P9_ATTR_GID (1 << 2)
507 #define P9_ATTR_SIZE (1 << 3)
508 #define P9_ATTR_ATIME (1 << 4)
509 #define P9_ATTR_MTIME (1 << 5)
510 #define P9_ATTR_CTIME (1 << 6)
511 #define P9_ATTR_ATIME_SET (1 << 7)
512 #define P9_ATTR_MTIME_SET (1 << 8)
514 struct dotl_iattr_map {
519 static int v9fs_mapped_iattr_valid(int iattr_valid)
522 int p9_iattr_valid = 0;
523 struct dotl_iattr_map dotl_iattr_map[] = {
524 { ATTR_MODE, P9_ATTR_MODE },
525 { ATTR_UID, P9_ATTR_UID },
526 { ATTR_GID, P9_ATTR_GID },
527 { ATTR_SIZE, P9_ATTR_SIZE },
528 { ATTR_ATIME, P9_ATTR_ATIME },
529 { ATTR_MTIME, P9_ATTR_MTIME },
530 { ATTR_CTIME, P9_ATTR_CTIME },
531 { ATTR_ATIME_SET, P9_ATTR_ATIME_SET },
532 { ATTR_MTIME_SET, P9_ATTR_MTIME_SET },
534 for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) {
535 if (iattr_valid & dotl_iattr_map[i].iattr_valid)
536 p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid;
538 return p9_iattr_valid;
542 * v9fs_vfs_setattr_dotl - set file metadata
543 * @mnt_userns: The user namespace of the mount
544 * @dentry: file whose metadata to set
545 * @iattr: metadata assignment structure
549 int v9fs_vfs_setattr_dotl(struct user_namespace *mnt_userns,
550 struct dentry *dentry, struct iattr *iattr)
552 int retval, use_dentry = 0;
553 struct p9_fid *fid = NULL;
554 struct p9_iattr_dotl p9attr;
555 struct inode *inode = d_inode(dentry);
557 p9_debug(P9_DEBUG_VFS, "\n");
559 retval = setattr_prepare(&init_user_ns, dentry, iattr);
563 p9attr.valid = v9fs_mapped_iattr_valid(iattr->ia_valid);
564 p9attr.mode = iattr->ia_mode;
565 p9attr.uid = iattr->ia_uid;
566 p9attr.gid = iattr->ia_gid;
567 p9attr.size = iattr->ia_size;
568 p9attr.atime_sec = iattr->ia_atime.tv_sec;
569 p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
570 p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
571 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);
591 p9_client_clunk(fid);
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);
607 p9_client_clunk(fid);
612 p9_client_clunk(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",
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);
748 /* Not in cached mode. No need to populate inode with stat */
749 inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0);
751 err = PTR_ERR(inode);
754 d_instantiate(dentry, inode);
759 p9_client_clunk(fid);
761 p9_client_clunk(dfid);
766 * v9fs_vfs_link_dotl - create a hardlink for dotl
767 * @old_dentry: dentry for file to link to
768 * @dir: inode destination for new link
769 * @dentry: dentry for link
774 v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
775 struct dentry *dentry)
778 struct p9_fid *dfid, *oldfid;
779 struct v9fs_session_info *v9ses;
781 p9_debug(P9_DEBUG_VFS, "dir ino: %lu, old_name: %pd, new_name: %pd\n",
782 dir->i_ino, old_dentry, dentry);
784 v9ses = v9fs_inode2v9ses(dir);
785 dfid = v9fs_parent_fid(dentry);
787 return PTR_ERR(dfid);
789 oldfid = v9fs_fid_lookup(old_dentry);
790 if (IS_ERR(oldfid)) {
791 p9_client_clunk(dfid);
792 return PTR_ERR(oldfid);
795 err = p9_client_link(dfid, oldfid, dentry->d_name.name);
797 p9_client_clunk(dfid);
798 p9_client_clunk(oldfid);
800 p9_debug(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
804 v9fs_invalidate_inode_attr(dir);
805 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
806 /* Get the latest stat info from server. */
809 fid = v9fs_fid_lookup(old_dentry);
813 v9fs_refresh_inode_dotl(fid, d_inode(old_dentry));
814 p9_client_clunk(fid);
816 ihold(d_inode(old_dentry));
817 d_instantiate(dentry, d_inode(old_dentry));
823 * v9fs_vfs_mknod_dotl - create a special file
824 * @mnt_userns: The user namespace of the mount
825 * @dir: inode destination for new link
826 * @dentry: dentry for file
827 * @omode: mode for creation
828 * @rdev: device associated with special file
832 v9fs_vfs_mknod_dotl(struct user_namespace *mnt_userns, struct inode *dir,
833 struct dentry *dentry, umode_t omode, dev_t rdev)
837 const unsigned char *name;
839 struct v9fs_session_info *v9ses;
840 struct p9_fid *fid = NULL, *dfid = NULL;
843 struct posix_acl *dacl = NULL, *pacl = NULL;
845 p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n",
846 dir->i_ino, dentry, omode,
847 MAJOR(rdev), MINOR(rdev));
849 v9ses = v9fs_inode2v9ses(dir);
850 dfid = v9fs_parent_fid(dentry);
853 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
858 gid = v9fs_get_fsgid_for_create(dir);
860 /* Update mode based on ACL value */
861 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
863 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mknod %d\n",
867 name = dentry->d_name.name;
869 err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
873 v9fs_invalidate_inode_attr(dir);
874 fid = p9_client_walk(dfid, 1, &name, 1);
877 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
883 /* instantiate inode and assign the unopened fid to the dentry */
884 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
885 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
887 err = PTR_ERR(inode);
888 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
892 v9fs_set_create_acl(inode, fid, dacl, pacl);
893 v9fs_fid_add(dentry, fid);
894 d_instantiate(dentry, inode);
899 * Not in cached mode. No need to populate inode with stat.
900 * socket syscall returns a fd, so we need instantiate
902 inode = v9fs_get_inode(dir->i_sb, mode, rdev);
904 err = PTR_ERR(inode);
907 v9fs_set_create_acl(inode, fid, dacl, pacl);
908 d_instantiate(dentry, inode);
912 p9_client_clunk(fid);
913 v9fs_put_acl(dacl, pacl);
914 p9_client_clunk(dfid);
920 * v9fs_vfs_get_link_dotl - follow a symlink path
921 * @dentry: dentry for symlink
922 * @inode: inode for symlink
923 * @done: destructor for return value
927 v9fs_vfs_get_link_dotl(struct dentry *dentry,
929 struct delayed_call *done)
936 return ERR_PTR(-ECHILD);
938 p9_debug(P9_DEBUG_VFS, "%pd\n", dentry);
940 fid = v9fs_fid_lookup(dentry);
942 return ERR_CAST(fid);
943 retval = p9_client_readlink(fid, &target);
944 p9_client_clunk(fid);
946 return ERR_PTR(retval);
947 set_delayed_call(done, kfree_link, target);
951 int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
953 struct p9_stat_dotl *st;
954 struct v9fs_session_info *v9ses;
957 v9ses = v9fs_inode2v9ses(inode);
958 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
962 * Don't update inode if the file type is different
964 if (inode_wrong_type(inode, st->st_mode))
968 * We don't want to refresh inode->i_size,
969 * because we may have cached data
971 flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ?
972 V9FS_STAT2INODE_KEEP_ISIZE : 0;
973 v9fs_stat2inode_dotl(st, inode, flags);
979 const struct inode_operations v9fs_dir_inode_operations_dotl = {
980 .create = v9fs_vfs_create_dotl,
981 .atomic_open = v9fs_vfs_atomic_open_dotl,
982 .lookup = v9fs_vfs_lookup,
983 .link = v9fs_vfs_link_dotl,
984 .symlink = v9fs_vfs_symlink_dotl,
985 .unlink = v9fs_vfs_unlink,
986 .mkdir = v9fs_vfs_mkdir_dotl,
987 .rmdir = v9fs_vfs_rmdir,
988 .mknod = v9fs_vfs_mknod_dotl,
989 .rename = v9fs_vfs_rename,
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_file_inode_operations_dotl = {
997 .getattr = v9fs_vfs_getattr_dotl,
998 .setattr = v9fs_vfs_setattr_dotl,
999 .listxattr = v9fs_listxattr,
1000 .get_acl = v9fs_iop_get_acl,
1003 const struct inode_operations v9fs_symlink_inode_operations_dotl = {
1004 .get_link = v9fs_vfs_get_link_dotl,
1005 .getattr = v9fs_vfs_getattr_dotl,
1006 .setattr = v9fs_vfs_setattr_dotl,
1007 .listxattr = v9fs_listxattr,