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 mnt_idmap *idmap, 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 * @idmap: 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 mnt_idmap *idmap, struct inode *dir,
223 struct dentry *dentry, umode_t omode, bool excl)
225 return v9fs_vfs_mknod_dotl(idmap, 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 int p9_omode = v9fs_open_to_dotl_flags(flags);
236 const unsigned char *name = NULL;
239 struct p9_fid *fid = NULL;
240 struct p9_fid *dfid = NULL, *ofid = 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 create %d\n",
290 if ((v9ses->cache & CACHE_WRITEBACK) && (p9_omode & P9_OWRITE)) {
291 p9_omode = (p9_omode & ~P9_OWRITE) | P9_ORDWR;
292 p9_debug(P9_DEBUG_CACHE,
293 "write-only file with writeback enabled, creating w/ O_RDWR\n");
295 err = p9_client_create_dotl(ofid, name, p9_omode, mode, gid, &qid);
297 p9_debug(P9_DEBUG_VFS, "p9_client_open_dotl failed in create %d\n",
301 v9fs_invalidate_inode_attr(dir);
303 /* instantiate inode and assign the unopened fid to the dentry */
304 fid = p9_client_walk(dfid, 1, &name, 1);
307 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
310 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
312 err = PTR_ERR(inode);
313 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err);
316 /* Now set the ACL based on the default value */
317 v9fs_set_create_acl(inode, fid, dacl, pacl);
319 v9fs_fid_add(dentry, &fid);
320 d_instantiate(dentry, inode);
322 /* Since we are opening a file, assign the open fid to the file */
323 err = finish_open(file, dentry, generic_file_open);
326 file->private_data = ofid;
327 #ifdef CONFIG_9P_FSCACHE
328 if (v9ses->cache & CACHE_FSCACHE) {
329 struct v9fs_inode *v9inode = V9FS_I(inode);
330 fscache_use_cookie(v9fs_inode_cookie(v9inode),
331 file->f_mode & FMODE_WRITE);
334 v9fs_fid_add_modes(ofid, v9ses->flags, v9ses->cache, flags);
335 v9fs_open_fid_add(inode, &ofid);
336 file->f_mode |= FMODE_CREATED;
341 v9fs_put_acl(dacl, pacl);
347 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
348 * @idmap: The idmap of the mount
349 * @dir: inode that is being unlinked
350 * @dentry: dentry that is being unlinked
351 * @omode: mode for new directory
355 static int v9fs_vfs_mkdir_dotl(struct mnt_idmap *idmap,
356 struct inode *dir, struct dentry *dentry,
360 struct v9fs_session_info *v9ses;
361 struct p9_fid *fid = NULL, *dfid = NULL;
363 const unsigned char *name;
367 struct posix_acl *dacl = NULL, *pacl = NULL;
369 p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
371 v9ses = v9fs_inode2v9ses(dir);
374 if (dir->i_mode & S_ISGID)
377 dfid = v9fs_parent_fid(dentry);
380 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
384 gid = v9fs_get_fsgid_for_create(dir);
386 /* Update mode based on ACL value */
387 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
389 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n",
393 name = dentry->d_name.name;
394 err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
397 fid = p9_client_walk(dfid, 1, &name, 1);
400 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
405 /* instantiate inode and assign the unopened fid to the dentry */
406 if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) {
407 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
409 err = PTR_ERR(inode);
410 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
414 v9fs_fid_add(dentry, &fid);
415 v9fs_set_create_acl(inode, fid, dacl, pacl);
416 d_instantiate(dentry, inode);
420 * Not in cached mode. No need to populate
421 * inode with stat. We need to get an inode
422 * so that we can set the acl with dentry
424 inode = v9fs_get_inode(dir->i_sb, mode, 0);
426 err = PTR_ERR(inode);
429 v9fs_set_create_acl(inode, fid, dacl, pacl);
430 d_instantiate(dentry, inode);
433 v9fs_invalidate_inode_attr(dir);
436 v9fs_put_acl(dacl, pacl);
442 v9fs_vfs_getattr_dotl(struct mnt_idmap *idmap,
443 const struct path *path, struct kstat *stat,
444 u32 request_mask, unsigned int flags)
446 struct dentry *dentry = path->dentry;
447 struct v9fs_session_info *v9ses;
449 struct inode *inode = d_inode(dentry);
450 struct p9_stat_dotl *st;
452 p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
453 v9ses = v9fs_dentry2v9ses(dentry);
454 if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) {
455 generic_fillattr(&nop_mnt_idmap, inode, stat);
457 } else if (v9ses->cache) {
458 if (S_ISREG(inode->i_mode)) {
459 int retval = filemap_fdatawrite(inode->i_mapping);
462 p9_debug(P9_DEBUG_ERROR,
463 "flushing writeback during getattr returned %d\n", retval);
466 fid = v9fs_fid_lookup(dentry);
470 /* Ask for all the fields in stat structure. Server will return
471 * whatever it supports
474 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
479 v9fs_stat2inode_dotl(st, d_inode(dentry), 0);
480 generic_fillattr(&nop_mnt_idmap, d_inode(dentry), stat);
481 /* Change block size to what the server returned */
482 stat->blksize = st->st_blksize;
491 #define P9_ATTR_MODE (1 << 0)
492 #define P9_ATTR_UID (1 << 1)
493 #define P9_ATTR_GID (1 << 2)
494 #define P9_ATTR_SIZE (1 << 3)
495 #define P9_ATTR_ATIME (1 << 4)
496 #define P9_ATTR_MTIME (1 << 5)
497 #define P9_ATTR_CTIME (1 << 6)
498 #define P9_ATTR_ATIME_SET (1 << 7)
499 #define P9_ATTR_MTIME_SET (1 << 8)
501 struct dotl_iattr_map {
506 static int v9fs_mapped_iattr_valid(int iattr_valid)
509 int p9_iattr_valid = 0;
510 struct dotl_iattr_map dotl_iattr_map[] = {
511 { ATTR_MODE, P9_ATTR_MODE },
512 { ATTR_UID, P9_ATTR_UID },
513 { ATTR_GID, P9_ATTR_GID },
514 { ATTR_SIZE, P9_ATTR_SIZE },
515 { ATTR_ATIME, P9_ATTR_ATIME },
516 { ATTR_MTIME, P9_ATTR_MTIME },
517 { ATTR_CTIME, P9_ATTR_CTIME },
518 { ATTR_ATIME_SET, P9_ATTR_ATIME_SET },
519 { ATTR_MTIME_SET, P9_ATTR_MTIME_SET },
521 for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) {
522 if (iattr_valid & dotl_iattr_map[i].iattr_valid)
523 p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid;
525 return p9_iattr_valid;
529 * v9fs_vfs_setattr_dotl - set file metadata
530 * @idmap: idmap of the mount
531 * @dentry: file whose metadata to set
532 * @iattr: metadata assignment structure
536 int v9fs_vfs_setattr_dotl(struct mnt_idmap *idmap,
537 struct dentry *dentry, struct iattr *iattr)
539 int retval, use_dentry = 0;
540 struct inode *inode = d_inode(dentry);
541 struct v9fs_session_info __maybe_unused *v9ses;
542 struct p9_fid *fid = NULL;
543 struct p9_iattr_dotl p9attr = {
548 p9_debug(P9_DEBUG_VFS, "\n");
550 retval = setattr_prepare(&nop_mnt_idmap, dentry, iattr);
554 v9ses = v9fs_dentry2v9ses(dentry);
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 retval = filemap_fdatawrite(inode->i_mapping);
589 p9_debug(P9_DEBUG_ERROR,
590 "Flushing file prior to setattr failed: %d\n", retval);
593 retval = p9_client_setattr(fid, &p9attr);
600 if ((iattr->ia_valid & ATTR_SIZE) && iattr->ia_size !=
601 i_size_read(inode)) {
602 truncate_setsize(inode, iattr->ia_size);
603 truncate_pagecache(inode, iattr->ia_size);
605 #ifdef CONFIG_9P_FSCACHE
606 if (v9ses->cache & CACHE_FSCACHE)
607 fscache_resize_cookie(v9fs_inode_cookie(V9FS_I(inode)),
612 v9fs_invalidate_inode_attr(inode);
613 setattr_copy(&nop_mnt_idmap, inode, iattr);
614 mark_inode_dirty(inode);
615 if (iattr->ia_valid & ATTR_MODE) {
616 /* We also want to update ACL when we update mode bits */
617 retval = v9fs_acl_chmod(inode, fid);
631 * v9fs_stat2inode_dotl - populate an inode structure with stat info
632 * @stat: stat structure
633 * @inode: inode to populate
634 * @flags: ctrl flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE)
639 v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode,
643 struct v9fs_inode *v9inode = V9FS_I(inode);
645 if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
646 inode->i_atime.tv_sec = stat->st_atime_sec;
647 inode->i_atime.tv_nsec = stat->st_atime_nsec;
648 inode->i_mtime.tv_sec = stat->st_mtime_sec;
649 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
650 inode->i_ctime.tv_sec = stat->st_ctime_sec;
651 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
652 inode->i_uid = stat->st_uid;
653 inode->i_gid = stat->st_gid;
654 set_nlink(inode, stat->st_nlink);
656 mode = stat->st_mode & S_IALLUGO;
657 mode |= inode->i_mode & ~S_IALLUGO;
658 inode->i_mode = mode;
660 if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE))
661 v9fs_i_size_write(inode, stat->st_size);
662 inode->i_blocks = stat->st_blocks;
664 if (stat->st_result_mask & P9_STATS_ATIME) {
665 inode->i_atime.tv_sec = stat->st_atime_sec;
666 inode->i_atime.tv_nsec = stat->st_atime_nsec;
668 if (stat->st_result_mask & P9_STATS_MTIME) {
669 inode->i_mtime.tv_sec = stat->st_mtime_sec;
670 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
672 if (stat->st_result_mask & P9_STATS_CTIME) {
673 inode->i_ctime.tv_sec = stat->st_ctime_sec;
674 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
676 if (stat->st_result_mask & P9_STATS_UID)
677 inode->i_uid = stat->st_uid;
678 if (stat->st_result_mask & P9_STATS_GID)
679 inode->i_gid = stat->st_gid;
680 if (stat->st_result_mask & P9_STATS_NLINK)
681 set_nlink(inode, stat->st_nlink);
682 if (stat->st_result_mask & P9_STATS_MODE) {
683 mode = stat->st_mode & S_IALLUGO;
684 mode |= inode->i_mode & ~S_IALLUGO;
685 inode->i_mode = mode;
687 if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE) &&
688 stat->st_result_mask & P9_STATS_SIZE)
689 v9fs_i_size_write(inode, stat->st_size);
690 if (stat->st_result_mask & P9_STATS_BLOCKS)
691 inode->i_blocks = stat->st_blocks;
693 if (stat->st_result_mask & P9_STATS_GEN)
694 inode->i_generation = stat->st_gen;
696 /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
697 * because the inode structure does not have fields for them.
699 v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
703 v9fs_vfs_symlink_dotl(struct mnt_idmap *idmap, struct inode *dir,
704 struct dentry *dentry, const char *symname)
708 const unsigned char *name;
712 struct p9_fid *fid = NULL;
713 struct v9fs_session_info *v9ses;
715 name = dentry->d_name.name;
716 p9_debug(P9_DEBUG_VFS, "%lu,%s,%s\n", dir->i_ino, name, symname);
717 v9ses = v9fs_inode2v9ses(dir);
719 dfid = v9fs_parent_fid(dentry);
722 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
726 gid = v9fs_get_fsgid_for_create(dir);
728 /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
729 err = p9_client_symlink(dfid, name, symname, gid, &qid);
732 p9_debug(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
736 v9fs_invalidate_inode_attr(dir);
737 if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) {
738 /* Now walk from the parent so we can get an unopened fid. */
739 fid = p9_client_walk(dfid, 1, &name, 1);
742 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);
759 /* Not in cached mode. No need to populate inode with stat */
760 inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0);
762 err = PTR_ERR(inode);
765 d_instantiate(dentry, inode);
775 * v9fs_vfs_link_dotl - create a hardlink for dotl
776 * @old_dentry: dentry for file to link to
777 * @dir: inode destination for new link
778 * @dentry: dentry for link
783 v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
784 struct dentry *dentry)
787 struct p9_fid *dfid, *oldfid;
788 struct v9fs_session_info *v9ses;
790 p9_debug(P9_DEBUG_VFS, "dir ino: %lu, old_name: %pd, new_name: %pd\n",
791 dir->i_ino, old_dentry, dentry);
793 v9ses = v9fs_inode2v9ses(dir);
794 dfid = v9fs_parent_fid(dentry);
796 return PTR_ERR(dfid);
798 oldfid = v9fs_fid_lookup(old_dentry);
799 if (IS_ERR(oldfid)) {
801 return PTR_ERR(oldfid);
804 err = p9_client_link(dfid, oldfid, dentry->d_name.name);
809 p9_debug(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
813 v9fs_invalidate_inode_attr(dir);
814 if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) {
815 /* Get the latest stat info from server. */
818 fid = v9fs_fid_lookup(old_dentry);
822 v9fs_refresh_inode_dotl(fid, d_inode(old_dentry));
825 ihold(d_inode(old_dentry));
826 d_instantiate(dentry, d_inode(old_dentry));
832 * v9fs_vfs_mknod_dotl - create a special file
833 * @idmap: The idmap of the mount
834 * @dir: inode destination for new link
835 * @dentry: dentry for file
836 * @omode: mode for creation
837 * @rdev: device associated with special file
841 v9fs_vfs_mknod_dotl(struct mnt_idmap *idmap, struct inode *dir,
842 struct dentry *dentry, umode_t omode, dev_t rdev)
846 const unsigned char *name;
848 struct v9fs_session_info *v9ses;
849 struct p9_fid *fid = NULL, *dfid = NULL;
852 struct posix_acl *dacl = NULL, *pacl = NULL;
854 p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n",
855 dir->i_ino, dentry, omode,
856 MAJOR(rdev), MINOR(rdev));
858 v9ses = v9fs_inode2v9ses(dir);
859 dfid = v9fs_parent_fid(dentry);
862 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
866 gid = v9fs_get_fsgid_for_create(dir);
868 /* Update mode based on ACL value */
869 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
871 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mknod %d\n",
875 name = dentry->d_name.name;
877 err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
881 v9fs_invalidate_inode_attr(dir);
882 fid = p9_client_walk(dfid, 1, &name, 1);
885 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
890 /* instantiate inode and assign the unopened fid to the dentry */
891 if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) {
892 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
894 err = PTR_ERR(inode);
895 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
899 v9fs_set_create_acl(inode, fid, dacl, pacl);
900 v9fs_fid_add(dentry, &fid);
901 d_instantiate(dentry, inode);
905 * Not in cached mode. No need to populate inode with stat.
906 * socket syscall returns a fd, so we need instantiate
908 inode = v9fs_get_inode(dir->i_sb, mode, rdev);
910 err = PTR_ERR(inode);
913 v9fs_set_create_acl(inode, fid, dacl, pacl);
914 d_instantiate(dentry, inode);
918 v9fs_put_acl(dacl, pacl);
925 * v9fs_vfs_get_link_dotl - follow a symlink path
926 * @dentry: dentry for symlink
927 * @inode: inode for symlink
928 * @done: destructor for return value
932 v9fs_vfs_get_link_dotl(struct dentry *dentry,
934 struct delayed_call *done)
941 return ERR_PTR(-ECHILD);
943 p9_debug(P9_DEBUG_VFS, "%pd\n", dentry);
945 fid = v9fs_fid_lookup(dentry);
947 return ERR_CAST(fid);
948 retval = p9_client_readlink(fid, &target);
951 return ERR_PTR(retval);
952 set_delayed_call(done, kfree_link, target);
956 int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
958 struct p9_stat_dotl *st;
959 struct v9fs_session_info *v9ses;
962 v9ses = v9fs_inode2v9ses(inode);
963 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
967 * Don't update inode if the file type is different
969 if (inode_wrong_type(inode, st->st_mode))
973 * We don't want to refresh inode->i_size,
974 * because we may have cached data
976 flags = (v9ses->cache & CACHE_LOOSE) ?
977 V9FS_STAT2INODE_KEEP_ISIZE : 0;
978 v9fs_stat2inode_dotl(st, inode, flags);
984 const struct inode_operations v9fs_dir_inode_operations_dotl = {
985 .create = v9fs_vfs_create_dotl,
986 .atomic_open = v9fs_vfs_atomic_open_dotl,
987 .lookup = v9fs_vfs_lookup,
988 .link = v9fs_vfs_link_dotl,
989 .symlink = v9fs_vfs_symlink_dotl,
990 .unlink = v9fs_vfs_unlink,
991 .mkdir = v9fs_vfs_mkdir_dotl,
992 .rmdir = v9fs_vfs_rmdir,
993 .mknod = v9fs_vfs_mknod_dotl,
994 .rename = v9fs_vfs_rename,
995 .getattr = v9fs_vfs_getattr_dotl,
996 .setattr = v9fs_vfs_setattr_dotl,
997 .listxattr = v9fs_listxattr,
998 .get_inode_acl = v9fs_iop_get_inode_acl,
999 .get_acl = v9fs_iop_get_acl,
1000 .set_acl = v9fs_iop_set_acl,
1003 const struct inode_operations v9fs_file_inode_operations_dotl = {
1004 .getattr = v9fs_vfs_getattr_dotl,
1005 .setattr = v9fs_vfs_setattr_dotl,
1006 .listxattr = v9fs_listxattr,
1007 .get_inode_acl = v9fs_iop_get_inode_acl,
1008 .get_acl = v9fs_iop_get_acl,
1009 .set_acl = v9fs_iop_set_acl,
1012 const struct inode_operations v9fs_symlink_inode_operations_dotl = {
1013 .get_link = v9fs_vfs_get_link_dotl,
1014 .getattr = v9fs_vfs_getattr_dotl,
1015 .setattr = v9fs_vfs_setattr_dotl,
1016 .listxattr = v9fs_listxattr,