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/namei.h>
17 #include <linux/sched.h>
18 #include <linux/slab.h>
19 #include <linux/xattr.h>
20 #include <linux/posix_acl.h>
21 #include <net/9p/9p.h>
22 #include <net/9p/client.h>
32 v9fs_vfs_mknod_dotl(struct mnt_idmap *idmap, struct inode *dir,
33 struct dentry *dentry, umode_t omode, dev_t rdev);
36 * v9fs_get_fsgid_for_create - Helper function to get the gid for a new object
37 * @dir_inode: The directory inode
39 * Helper function to get the gid for creating a
40 * new file system object. This checks the S_ISGID to determine the owning
41 * group of the new file system object.
44 static kgid_t v9fs_get_fsgid_for_create(struct inode *dir_inode)
46 BUG_ON(dir_inode == NULL);
48 if (dir_inode->i_mode & S_ISGID) {
49 /* set_gid bit is set.*/
50 return dir_inode->i_gid;
52 return current_fsgid();
55 static int v9fs_test_inode_dotl(struct inode *inode, void *data)
57 struct v9fs_inode *v9inode = V9FS_I(inode);
58 struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
60 /* don't match inode of different type */
61 if (inode_wrong_type(inode, st->st_mode))
64 if (inode->i_generation != st->st_gen)
67 /* compare qid details */
68 if (memcmp(&v9inode->qid.version,
69 &st->qid.version, sizeof(v9inode->qid.version)))
72 if (v9inode->qid.type != st->qid.type)
75 if (v9inode->qid.path != st->qid.path)
80 /* Always get a new inode */
81 static int v9fs_test_new_inode_dotl(struct inode *inode, void *data)
86 static int v9fs_set_inode_dotl(struct inode *inode, void *data)
88 struct v9fs_inode *v9inode = V9FS_I(inode);
89 struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
91 memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
92 inode->i_generation = st->st_gen;
96 static struct inode *v9fs_qid_iget_dotl(struct super_block *sb,
99 struct p9_stat_dotl *st,
105 struct v9fs_session_info *v9ses = sb->s_fs_info;
106 int (*test)(struct inode *inode, void *data);
109 test = v9fs_test_new_inode_dotl;
111 test = v9fs_test_inode_dotl;
113 i_ino = v9fs_qid2ino(qid);
114 inode = iget5_locked(sb, i_ino, test, v9fs_set_inode_dotl, st);
116 return ERR_PTR(-ENOMEM);
117 if (!(inode->i_state & I_NEW))
120 * initialize the inode with the stat info
121 * FIXME!! we may need support for stale inodes
124 inode->i_ino = i_ino;
125 retval = v9fs_init_inode(v9ses, inode,
126 st->st_mode, new_decode_dev(st->st_rdev));
130 v9fs_stat2inode_dotl(st, inode, 0);
131 v9fs_cache_inode_get_cookie(inode);
132 retval = v9fs_get_acl(inode, fid);
136 unlock_new_inode(inode);
140 return ERR_PTR(retval);
145 v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
146 struct super_block *sb, int new)
148 struct p9_stat_dotl *st;
149 struct inode *inode = NULL;
151 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN);
155 inode = v9fs_qid_iget_dotl(sb, &st->qid, fid, st, new);
160 struct dotl_openflag_map {
165 static int v9fs_mapped_dotl_flags(int flags)
169 struct dotl_openflag_map dotl_oflag_map[] = {
170 { O_CREAT, P9_DOTL_CREATE },
171 { O_EXCL, P9_DOTL_EXCL },
172 { O_NOCTTY, P9_DOTL_NOCTTY },
173 { O_APPEND, P9_DOTL_APPEND },
174 { O_NONBLOCK, P9_DOTL_NONBLOCK },
175 { O_DSYNC, P9_DOTL_DSYNC },
176 { FASYNC, P9_DOTL_FASYNC },
177 { O_DIRECT, P9_DOTL_DIRECT },
178 { O_LARGEFILE, P9_DOTL_LARGEFILE },
179 { O_DIRECTORY, P9_DOTL_DIRECTORY },
180 { O_NOFOLLOW, P9_DOTL_NOFOLLOW },
181 { O_NOATIME, P9_DOTL_NOATIME },
182 { O_CLOEXEC, P9_DOTL_CLOEXEC },
183 { O_SYNC, P9_DOTL_SYNC},
185 for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) {
186 if (flags & dotl_oflag_map[i].open_flag)
187 rflags |= dotl_oflag_map[i].dotl_flag;
193 * v9fs_open_to_dotl_flags- convert Linux specific open flags to
195 * @flags: flags to convert
197 int v9fs_open_to_dotl_flags(int flags)
202 * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY
203 * and P9_DOTL_NOACCESS
205 rflags |= flags & O_ACCMODE;
206 rflags |= v9fs_mapped_dotl_flags(flags);
212 * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
213 * @idmap: The user namespace of the mount
214 * @dir: directory inode that is being created
215 * @dentry: dentry that is being deleted
216 * @omode: create permissions
217 * @excl: True if the file must not yet exist
221 v9fs_vfs_create_dotl(struct mnt_idmap *idmap, struct inode *dir,
222 struct dentry *dentry, umode_t omode, bool excl)
224 return v9fs_vfs_mknod_dotl(idmap, dir, dentry, omode, 0);
228 v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
229 struct file *file, unsigned int flags, umode_t omode)
234 int p9_omode = v9fs_open_to_dotl_flags(flags);
235 const unsigned char *name = NULL;
238 struct p9_fid *fid = NULL;
239 struct p9_fid *dfid = NULL, *ofid = NULL;
240 struct v9fs_session_info *v9ses;
241 struct posix_acl *pacl = NULL, *dacl = NULL;
242 struct dentry *res = NULL;
244 if (d_in_lookup(dentry)) {
245 res = v9fs_vfs_lookup(dir, dentry, 0);
254 if (!(flags & O_CREAT) || d_really_is_positive(dentry))
255 return finish_no_open(file, res);
257 v9ses = v9fs_inode2v9ses(dir);
259 name = dentry->d_name.name;
260 p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%x\n",
263 dfid = v9fs_parent_fid(dentry);
266 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
270 /* clone a fid to use for creation */
271 ofid = clone_fid(dfid);
274 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
278 gid = v9fs_get_fsgid_for_create(dir);
281 /* Update mode based on ACL value */
282 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
284 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in create %d\n",
289 if ((v9ses->cache & CACHE_WRITEBACK) && (p9_omode & P9_OWRITE)) {
290 p9_omode = (p9_omode & ~P9_OWRITE) | P9_ORDWR;
291 p9_debug(P9_DEBUG_CACHE,
292 "write-only file with writeback enabled, creating w/ O_RDWR\n");
294 err = p9_client_create_dotl(ofid, name, p9_omode, mode, gid, &qid);
296 p9_debug(P9_DEBUG_VFS, "p9_client_open_dotl failed in create %d\n",
300 v9fs_invalidate_inode_attr(dir);
302 /* instantiate inode and assign the unopened fid to the dentry */
303 fid = p9_client_walk(dfid, 1, &name, 1);
306 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
309 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
311 err = PTR_ERR(inode);
312 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err);
315 /* Now set the ACL based on the default value */
316 v9fs_set_create_acl(inode, fid, dacl, pacl);
318 v9fs_fid_add(dentry, &fid);
319 d_instantiate(dentry, inode);
321 /* Since we are opening a file, assign the open fid to the file */
322 err = finish_open(file, dentry, generic_file_open);
325 file->private_data = ofid;
326 #ifdef CONFIG_9P_FSCACHE
327 if (v9ses->cache & CACHE_FSCACHE) {
328 struct v9fs_inode *v9inode = V9FS_I(inode);
329 fscache_use_cookie(v9fs_inode_cookie(v9inode),
330 file->f_mode & FMODE_WRITE);
333 v9fs_fid_add_modes(ofid, v9ses->flags, v9ses->cache, flags);
334 v9fs_open_fid_add(inode, &ofid);
335 file->f_mode |= FMODE_CREATED;
340 v9fs_put_acl(dacl, pacl);
346 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
347 * @idmap: The idmap of the mount
348 * @dir: inode that is being unlinked
349 * @dentry: dentry that is being unlinked
350 * @omode: mode for new directory
354 static int v9fs_vfs_mkdir_dotl(struct mnt_idmap *idmap,
355 struct inode *dir, struct dentry *dentry,
359 struct v9fs_session_info *v9ses;
360 struct p9_fid *fid = NULL, *dfid = NULL;
362 const unsigned char *name;
366 struct posix_acl *dacl = NULL, *pacl = NULL;
368 p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
370 v9ses = v9fs_inode2v9ses(dir);
373 if (dir->i_mode & S_ISGID)
376 dfid = v9fs_parent_fid(dentry);
379 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
383 gid = v9fs_get_fsgid_for_create(dir);
385 /* Update mode based on ACL value */
386 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
388 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n",
392 name = dentry->d_name.name;
393 err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
396 fid = p9_client_walk(dfid, 1, &name, 1);
399 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
404 /* instantiate inode and assign the unopened fid to the dentry */
405 if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) {
406 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
408 err = PTR_ERR(inode);
409 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
413 v9fs_fid_add(dentry, &fid);
414 v9fs_set_create_acl(inode, fid, dacl, pacl);
415 d_instantiate(dentry, inode);
419 * Not in cached mode. No need to populate
420 * inode with stat. We need to get an inode
421 * so that we can set the acl with dentry
423 inode = v9fs_get_inode(dir->i_sb, mode, 0);
425 err = PTR_ERR(inode);
428 v9fs_set_create_acl(inode, fid, dacl, pacl);
429 d_instantiate(dentry, inode);
432 v9fs_invalidate_inode_attr(dir);
435 v9fs_put_acl(dacl, pacl);
441 v9fs_vfs_getattr_dotl(struct mnt_idmap *idmap,
442 const struct path *path, struct kstat *stat,
443 u32 request_mask, unsigned int flags)
445 struct dentry *dentry = path->dentry;
446 struct v9fs_session_info *v9ses;
448 struct inode *inode = d_inode(dentry);
449 struct p9_stat_dotl *st;
451 p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
452 v9ses = v9fs_dentry2v9ses(dentry);
453 if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) {
454 generic_fillattr(&nop_mnt_idmap, inode, stat);
456 } else if (v9ses->cache) {
457 if (S_ISREG(inode->i_mode)) {
458 int retval = filemap_fdatawrite(inode->i_mapping);
461 p9_debug(P9_DEBUG_ERROR,
462 "flushing writeback during getattr returned %d\n", retval);
465 fid = v9fs_fid_lookup(dentry);
469 /* Ask for all the fields in stat structure. Server will return
470 * whatever it supports
473 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
478 v9fs_stat2inode_dotl(st, d_inode(dentry), 0);
479 generic_fillattr(&nop_mnt_idmap, d_inode(dentry), stat);
480 /* Change block size to what the server returned */
481 stat->blksize = st->st_blksize;
490 #define P9_ATTR_MODE (1 << 0)
491 #define P9_ATTR_UID (1 << 1)
492 #define P9_ATTR_GID (1 << 2)
493 #define P9_ATTR_SIZE (1 << 3)
494 #define P9_ATTR_ATIME (1 << 4)
495 #define P9_ATTR_MTIME (1 << 5)
496 #define P9_ATTR_CTIME (1 << 6)
497 #define P9_ATTR_ATIME_SET (1 << 7)
498 #define P9_ATTR_MTIME_SET (1 << 8)
500 struct dotl_iattr_map {
505 static int v9fs_mapped_iattr_valid(int iattr_valid)
508 int p9_iattr_valid = 0;
509 struct dotl_iattr_map dotl_iattr_map[] = {
510 { ATTR_MODE, P9_ATTR_MODE },
511 { ATTR_UID, P9_ATTR_UID },
512 { ATTR_GID, P9_ATTR_GID },
513 { ATTR_SIZE, P9_ATTR_SIZE },
514 { ATTR_ATIME, P9_ATTR_ATIME },
515 { ATTR_MTIME, P9_ATTR_MTIME },
516 { ATTR_CTIME, P9_ATTR_CTIME },
517 { ATTR_ATIME_SET, P9_ATTR_ATIME_SET },
518 { ATTR_MTIME_SET, P9_ATTR_MTIME_SET },
520 for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) {
521 if (iattr_valid & dotl_iattr_map[i].iattr_valid)
522 p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid;
524 return p9_iattr_valid;
528 * v9fs_vfs_setattr_dotl - set file metadata
529 * @idmap: idmap of the mount
530 * @dentry: file whose metadata to set
531 * @iattr: metadata assignment structure
535 int v9fs_vfs_setattr_dotl(struct mnt_idmap *idmap,
536 struct dentry *dentry, struct iattr *iattr)
538 int retval, use_dentry = 0;
539 struct inode *inode = d_inode(dentry);
540 struct v9fs_session_info __maybe_unused *v9ses;
541 struct p9_fid *fid = NULL;
542 struct p9_iattr_dotl p9attr = {
547 p9_debug(P9_DEBUG_VFS, "\n");
549 retval = setattr_prepare(&nop_mnt_idmap, dentry, iattr);
553 v9ses = v9fs_dentry2v9ses(dentry);
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 retval = filemap_fdatawrite(inode->i_mapping);
588 p9_debug(P9_DEBUG_ERROR,
589 "Flushing file prior to setattr failed: %d\n", retval);
592 retval = p9_client_setattr(fid, &p9attr);
599 if ((iattr->ia_valid & ATTR_SIZE) && iattr->ia_size !=
600 i_size_read(inode)) {
601 truncate_setsize(inode, iattr->ia_size);
602 truncate_pagecache(inode, iattr->ia_size);
604 #ifdef CONFIG_9P_FSCACHE
605 if (v9ses->cache & CACHE_FSCACHE)
606 fscache_resize_cookie(v9fs_inode_cookie(V9FS_I(inode)),
611 v9fs_invalidate_inode_attr(inode);
612 setattr_copy(&nop_mnt_idmap, 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);
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 mnt_idmap *idmap, 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_META|CACHE_LOOSE)) {
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",
746 /* instantiate inode and assign the unopened fid to dentry */
747 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
749 err = PTR_ERR(inode);
750 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
754 v9fs_fid_add(dentry, &fid);
755 d_instantiate(dentry, inode);
758 /* Not in cached mode. No need to populate inode with stat */
759 inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0);
761 err = PTR_ERR(inode);
764 d_instantiate(dentry, inode);
774 * v9fs_vfs_link_dotl - create a hardlink for dotl
775 * @old_dentry: dentry for file to link to
776 * @dir: inode destination for new link
777 * @dentry: dentry for link
782 v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
783 struct dentry *dentry)
786 struct p9_fid *dfid, *oldfid;
787 struct v9fs_session_info *v9ses;
789 p9_debug(P9_DEBUG_VFS, "dir ino: %lu, old_name: %pd, new_name: %pd\n",
790 dir->i_ino, old_dentry, dentry);
792 v9ses = v9fs_inode2v9ses(dir);
793 dfid = v9fs_parent_fid(dentry);
795 return PTR_ERR(dfid);
797 oldfid = v9fs_fid_lookup(old_dentry);
798 if (IS_ERR(oldfid)) {
800 return PTR_ERR(oldfid);
803 err = p9_client_link(dfid, oldfid, dentry->d_name.name);
808 p9_debug(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
812 v9fs_invalidate_inode_attr(dir);
813 if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) {
814 /* Get the latest stat info from server. */
817 fid = v9fs_fid_lookup(old_dentry);
821 v9fs_refresh_inode_dotl(fid, d_inode(old_dentry));
824 ihold(d_inode(old_dentry));
825 d_instantiate(dentry, d_inode(old_dentry));
831 * v9fs_vfs_mknod_dotl - create a special file
832 * @idmap: The idmap of the mount
833 * @dir: inode destination for new link
834 * @dentry: dentry for file
835 * @omode: mode for creation
836 * @rdev: device associated with special file
840 v9fs_vfs_mknod_dotl(struct mnt_idmap *idmap, struct inode *dir,
841 struct dentry *dentry, umode_t omode, dev_t rdev)
845 const unsigned char *name;
847 struct v9fs_session_info *v9ses;
848 struct p9_fid *fid = NULL, *dfid = NULL;
851 struct posix_acl *dacl = NULL, *pacl = NULL;
853 p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n",
854 dir->i_ino, dentry, omode,
855 MAJOR(rdev), MINOR(rdev));
857 v9ses = v9fs_inode2v9ses(dir);
858 dfid = v9fs_parent_fid(dentry);
861 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
865 gid = v9fs_get_fsgid_for_create(dir);
867 /* Update mode based on ACL value */
868 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
870 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mknod %d\n",
874 name = dentry->d_name.name;
876 err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
880 v9fs_invalidate_inode_attr(dir);
881 fid = p9_client_walk(dfid, 1, &name, 1);
884 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
889 /* instantiate inode and assign the unopened fid to the dentry */
890 if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) {
891 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
893 err = PTR_ERR(inode);
894 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
898 v9fs_set_create_acl(inode, fid, dacl, pacl);
899 v9fs_fid_add(dentry, &fid);
900 d_instantiate(dentry, inode);
904 * Not in cached mode. No need to populate inode with stat.
905 * socket syscall returns a fd, so we need instantiate
907 inode = v9fs_get_inode(dir->i_sb, mode, rdev);
909 err = PTR_ERR(inode);
912 v9fs_set_create_acl(inode, fid, dacl, pacl);
913 d_instantiate(dentry, inode);
917 v9fs_put_acl(dacl, pacl);
924 * v9fs_vfs_get_link_dotl - follow a symlink path
925 * @dentry: dentry for symlink
926 * @inode: inode for symlink
927 * @done: destructor for return value
931 v9fs_vfs_get_link_dotl(struct dentry *dentry,
933 struct delayed_call *done)
940 return ERR_PTR(-ECHILD);
942 p9_debug(P9_DEBUG_VFS, "%pd\n", dentry);
944 fid = v9fs_fid_lookup(dentry);
946 return ERR_CAST(fid);
947 retval = p9_client_readlink(fid, &target);
950 return ERR_PTR(retval);
951 set_delayed_call(done, kfree_link, target);
955 int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
957 struct p9_stat_dotl *st;
958 struct v9fs_session_info *v9ses;
961 v9ses = v9fs_inode2v9ses(inode);
962 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
966 * Don't update inode if the file type is different
968 if (inode_wrong_type(inode, st->st_mode))
972 * We don't want to refresh inode->i_size,
973 * because we may have cached data
975 flags = (v9ses->cache & CACHE_LOOSE) ?
976 V9FS_STAT2INODE_KEEP_ISIZE : 0;
977 v9fs_stat2inode_dotl(st, inode, flags);
983 const struct inode_operations v9fs_dir_inode_operations_dotl = {
984 .create = v9fs_vfs_create_dotl,
985 .atomic_open = v9fs_vfs_atomic_open_dotl,
986 .lookup = v9fs_vfs_lookup,
987 .link = v9fs_vfs_link_dotl,
988 .symlink = v9fs_vfs_symlink_dotl,
989 .unlink = v9fs_vfs_unlink,
990 .mkdir = v9fs_vfs_mkdir_dotl,
991 .rmdir = v9fs_vfs_rmdir,
992 .mknod = v9fs_vfs_mknod_dotl,
993 .rename = v9fs_vfs_rename,
994 .getattr = v9fs_vfs_getattr_dotl,
995 .setattr = v9fs_vfs_setattr_dotl,
996 .listxattr = v9fs_listxattr,
997 .get_inode_acl = v9fs_iop_get_inode_acl,
998 .get_acl = v9fs_iop_get_acl,
999 .set_acl = v9fs_iop_set_acl,
1002 const struct inode_operations v9fs_file_inode_operations_dotl = {
1003 .getattr = v9fs_vfs_getattr_dotl,
1004 .setattr = v9fs_vfs_setattr_dotl,
1005 .listxattr = v9fs_listxattr,
1006 .get_inode_acl = v9fs_iop_get_inode_acl,
1007 .get_acl = v9fs_iop_get_acl,
1008 .set_acl = v9fs_iop_set_acl,
1011 const struct inode_operations v9fs_symlink_inode_operations_dotl = {
1012 .get_link = v9fs_vfs_get_link_dotl,
1013 .getattr = v9fs_vfs_getattr_dotl,
1014 .setattr = v9fs_vfs_setattr_dotl,
1015 .listxattr = v9fs_listxattr,