1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/fs/9p/vfs_inode_dotl.c
5 * This file contains vfs inode ops for the 9P2000.L protocol.
7 * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
8 * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
11 #include <linux/module.h>
12 #include <linux/errno.h>
14 #include <linux/file.h>
15 #include <linux/pagemap.h>
16 #include <linux/stat.h>
17 #include <linux/string.h>
18 #include <linux/inet.h>
19 #include <linux/namei.h>
20 #include <linux/idr.h>
21 #include <linux/sched.h>
22 #include <linux/slab.h>
23 #include <linux/xattr.h>
24 #include <linux/posix_acl.h>
25 #include <net/9p/9p.h>
26 #include <net/9p/client.h>
36 v9fs_vfs_mknod_dotl(struct inode
*dir
, struct dentry
*dentry
, umode_t omode
,
40 * v9fs_get_fsgid_for_create - 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
->i_mode
& S_IFMT
) != (st
->st_mode
& S_IFMT
))
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
*, void *);
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 * @dir: directory inode that is being created
215 * @dentry: dentry that is being deleted
216 * @omode: create permissions
221 v9fs_vfs_create_dotl(struct inode
*dir
, struct dentry
*dentry
, umode_t omode
,
224 return v9fs_vfs_mknod_dotl(dir
, dentry
, omode
, 0);
228 v9fs_vfs_atomic_open_dotl(struct inode
*dir
, struct dentry
*dentry
,
229 struct file
*file
, unsigned flags
, umode_t omode
)
234 const unsigned char *name
= NULL
;
237 struct p9_fid
*fid
= NULL
;
238 struct v9fs_inode
*v9inode
;
239 struct p9_fid
*dfid
, *ofid
, *inode_fid
;
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%hx\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 creat %d\n",
288 err
= p9_client_create_dotl(ofid
, name
, v9fs_open_to_dotl_flags(flags
),
291 p9_debug(P9_DEBUG_VFS
, "p9_client_open_dotl failed in creat %d\n",
295 v9fs_invalidate_inode_attr(dir
);
297 /* instantiate inode and assign the unopened fid to the dentry */
298 fid
= p9_client_walk(dfid
, 1, &name
, 1);
301 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
);
333 goto err_clunk_old_fid
;
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
);
341 goto err_clunk_old_fid
;
342 file
->private_data
= ofid
;
343 if (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
)
344 v9fs_cache_inode_set_cookie(inode
, file
);
345 file
->f_mode
|= FMODE_CREATED
;
347 v9fs_put_acl(dacl
, pacl
);
353 p9_client_clunk(fid
);
356 p9_client_clunk(ofid
);
361 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
362 * @dir: inode that is being unlinked
363 * @dentry: dentry that is being unlinked
364 * @omode: mode for new directory
368 static int v9fs_vfs_mkdir_dotl(struct inode
*dir
,
369 struct dentry
*dentry
, umode_t omode
)
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
);
397 gid
= v9fs_get_fsgid_for_create(dir
);
399 /* Update mode based on ACL value */
400 err
= v9fs_acl_mode(dir
, &mode
, &dacl
, &pacl
);
402 p9_debug(P9_DEBUG_VFS
, "Failed to get acl values in mkdir %d\n",
406 name
= dentry
->d_name
.name
;
407 err
= p9_client_mkdir_dotl(dfid
, name
, mode
, gid
, &qid
);
411 fid
= p9_client_walk(dfid
, 1, &name
, 1);
414 p9_debug(P9_DEBUG_VFS
, "p9_client_walk failed %d\n",
420 /* instantiate inode and assign the unopened fid to the dentry */
421 if (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
) {
422 inode
= v9fs_get_new_inode_from_fid(v9ses
, fid
, dir
->i_sb
);
424 err
= PTR_ERR(inode
);
425 p9_debug(P9_DEBUG_VFS
, "inode creation failed %d\n",
429 v9fs_fid_add(dentry
, fid
);
430 v9fs_set_create_acl(inode
, fid
, dacl
, pacl
);
431 d_instantiate(dentry
, inode
);
436 * Not in cached mode. No need to populate
437 * inode with stat. We need to get an inode
438 * so that we can set the acl with dentry
440 inode
= v9fs_get_inode(dir
->i_sb
, mode
, 0);
442 err
= PTR_ERR(inode
);
445 v9fs_set_create_acl(inode
, fid
, dacl
, pacl
);
446 d_instantiate(dentry
, inode
);
449 v9fs_invalidate_inode_attr(dir
);
452 p9_client_clunk(fid
);
453 v9fs_put_acl(dacl
, pacl
);
458 v9fs_vfs_getattr_dotl(const struct path
*path
, struct kstat
*stat
,
459 u32 request_mask
, unsigned int flags
)
461 struct dentry
*dentry
= path
->dentry
;
462 struct v9fs_session_info
*v9ses
;
464 struct p9_stat_dotl
*st
;
466 p9_debug(P9_DEBUG_VFS
, "dentry: %p\n", dentry
);
467 v9ses
= v9fs_dentry2v9ses(dentry
);
468 if (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
) {
469 generic_fillattr(d_inode(dentry
), stat
);
472 fid
= v9fs_fid_lookup(dentry
);
476 /* Ask for all the fields in stat structure. Server will return
477 * whatever it supports
480 st
= p9_client_getattr_dotl(fid
, P9_STATS_ALL
);
484 v9fs_stat2inode_dotl(st
, d_inode(dentry
), 0);
485 generic_fillattr(d_inode(dentry
), stat
);
486 /* Change block size to what the server returned */
487 stat
->blksize
= st
->st_blksize
;
496 #define P9_ATTR_MODE (1 << 0)
497 #define P9_ATTR_UID (1 << 1)
498 #define P9_ATTR_GID (1 << 2)
499 #define P9_ATTR_SIZE (1 << 3)
500 #define P9_ATTR_ATIME (1 << 4)
501 #define P9_ATTR_MTIME (1 << 5)
502 #define P9_ATTR_CTIME (1 << 6)
503 #define P9_ATTR_ATIME_SET (1 << 7)
504 #define P9_ATTR_MTIME_SET (1 << 8)
506 struct dotl_iattr_map
{
511 static int v9fs_mapped_iattr_valid(int iattr_valid
)
514 int p9_iattr_valid
= 0;
515 struct dotl_iattr_map dotl_iattr_map
[] = {
516 { ATTR_MODE
, P9_ATTR_MODE
},
517 { ATTR_UID
, P9_ATTR_UID
},
518 { ATTR_GID
, P9_ATTR_GID
},
519 { ATTR_SIZE
, P9_ATTR_SIZE
},
520 { ATTR_ATIME
, P9_ATTR_ATIME
},
521 { ATTR_MTIME
, P9_ATTR_MTIME
},
522 { ATTR_CTIME
, P9_ATTR_CTIME
},
523 { ATTR_ATIME_SET
, P9_ATTR_ATIME_SET
},
524 { ATTR_MTIME_SET
, P9_ATTR_MTIME_SET
},
526 for (i
= 0; i
< ARRAY_SIZE(dotl_iattr_map
); i
++) {
527 if (iattr_valid
& dotl_iattr_map
[i
].iattr_valid
)
528 p9_iattr_valid
|= dotl_iattr_map
[i
].p9_iattr_valid
;
530 return p9_iattr_valid
;
534 * v9fs_vfs_setattr_dotl - set file metadata
535 * @dentry: file whose metadata to set
536 * @iattr: metadata assignment structure
540 int v9fs_vfs_setattr_dotl(struct dentry
*dentry
, struct iattr
*iattr
)
543 struct p9_fid
*fid
= NULL
;
544 struct p9_iattr_dotl p9attr
;
545 struct inode
*inode
= d_inode(dentry
);
547 p9_debug(P9_DEBUG_VFS
, "\n");
549 retval
= setattr_prepare(dentry
, iattr
);
553 p9attr
.valid
= v9fs_mapped_iattr_valid(iattr
->ia_valid
);
554 p9attr
.mode
= iattr
->ia_mode
;
555 p9attr
.uid
= iattr
->ia_uid
;
556 p9attr
.gid
= iattr
->ia_gid
;
557 p9attr
.size
= iattr
->ia_size
;
558 p9attr
.atime_sec
= iattr
->ia_atime
.tv_sec
;
559 p9attr
.atime_nsec
= iattr
->ia_atime
.tv_nsec
;
560 p9attr
.mtime_sec
= iattr
->ia_mtime
.tv_sec
;
561 p9attr
.mtime_nsec
= iattr
->ia_mtime
.tv_nsec
;
563 if (iattr
->ia_valid
& ATTR_FILE
) {
564 fid
= iattr
->ia_file
->private_data
;
568 fid
= v9fs_fid_lookup(dentry
);
572 /* Write all dirty data */
573 if (S_ISREG(inode
->i_mode
))
574 filemap_write_and_wait(inode
->i_mapping
);
576 retval
= p9_client_setattr(fid
, &p9attr
);
580 if ((iattr
->ia_valid
& ATTR_SIZE
) &&
581 iattr
->ia_size
!= i_size_read(inode
))
582 truncate_setsize(inode
, iattr
->ia_size
);
584 v9fs_invalidate_inode_attr(inode
);
585 setattr_copy(inode
, iattr
);
586 mark_inode_dirty(inode
);
587 if (iattr
->ia_valid
& ATTR_MODE
) {
588 /* We also want to update ACL when we update mode bits */
589 retval
= v9fs_acl_chmod(inode
, fid
);
597 * v9fs_stat2inode_dotl - populate an inode structure with stat info
598 * @stat: stat structure
599 * @inode: inode to populate
600 * @flags: ctrl flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE)
605 v9fs_stat2inode_dotl(struct p9_stat_dotl
*stat
, struct inode
*inode
,
609 struct v9fs_inode
*v9inode
= V9FS_I(inode
);
611 if ((stat
->st_result_mask
& P9_STATS_BASIC
) == P9_STATS_BASIC
) {
612 inode
->i_atime
.tv_sec
= stat
->st_atime_sec
;
613 inode
->i_atime
.tv_nsec
= stat
->st_atime_nsec
;
614 inode
->i_mtime
.tv_sec
= stat
->st_mtime_sec
;
615 inode
->i_mtime
.tv_nsec
= stat
->st_mtime_nsec
;
616 inode
->i_ctime
.tv_sec
= stat
->st_ctime_sec
;
617 inode
->i_ctime
.tv_nsec
= stat
->st_ctime_nsec
;
618 inode
->i_uid
= stat
->st_uid
;
619 inode
->i_gid
= stat
->st_gid
;
620 set_nlink(inode
, stat
->st_nlink
);
622 mode
= stat
->st_mode
& S_IALLUGO
;
623 mode
|= inode
->i_mode
& ~S_IALLUGO
;
624 inode
->i_mode
= mode
;
626 if (!(flags
& V9FS_STAT2INODE_KEEP_ISIZE
))
627 v9fs_i_size_write(inode
, stat
->st_size
);
628 inode
->i_blocks
= stat
->st_blocks
;
630 if (stat
->st_result_mask
& P9_STATS_ATIME
) {
631 inode
->i_atime
.tv_sec
= stat
->st_atime_sec
;
632 inode
->i_atime
.tv_nsec
= stat
->st_atime_nsec
;
634 if (stat
->st_result_mask
& P9_STATS_MTIME
) {
635 inode
->i_mtime
.tv_sec
= stat
->st_mtime_sec
;
636 inode
->i_mtime
.tv_nsec
= stat
->st_mtime_nsec
;
638 if (stat
->st_result_mask
& P9_STATS_CTIME
) {
639 inode
->i_ctime
.tv_sec
= stat
->st_ctime_sec
;
640 inode
->i_ctime
.tv_nsec
= stat
->st_ctime_nsec
;
642 if (stat
->st_result_mask
& P9_STATS_UID
)
643 inode
->i_uid
= stat
->st_uid
;
644 if (stat
->st_result_mask
& P9_STATS_GID
)
645 inode
->i_gid
= stat
->st_gid
;
646 if (stat
->st_result_mask
& P9_STATS_NLINK
)
647 set_nlink(inode
, stat
->st_nlink
);
648 if (stat
->st_result_mask
& P9_STATS_MODE
) {
649 inode
->i_mode
= stat
->st_mode
;
650 if ((S_ISBLK(inode
->i_mode
)) ||
651 (S_ISCHR(inode
->i_mode
)))
652 init_special_inode(inode
, inode
->i_mode
,
655 if (stat
->st_result_mask
& P9_STATS_RDEV
)
656 inode
->i_rdev
= new_decode_dev(stat
->st_rdev
);
657 if (!(flags
& V9FS_STAT2INODE_KEEP_ISIZE
) &&
658 stat
->st_result_mask
& P9_STATS_SIZE
)
659 v9fs_i_size_write(inode
, stat
->st_size
);
660 if (stat
->st_result_mask
& P9_STATS_BLOCKS
)
661 inode
->i_blocks
= stat
->st_blocks
;
663 if (stat
->st_result_mask
& P9_STATS_GEN
)
664 inode
->i_generation
= stat
->st_gen
;
666 /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
667 * because the inode structure does not have fields for them.
669 v9inode
->cache_validity
&= ~V9FS_INO_INVALID_ATTR
;
673 v9fs_vfs_symlink_dotl(struct inode
*dir
, struct dentry
*dentry
,
678 const unsigned char *name
;
682 struct p9_fid
*fid
= NULL
;
683 struct v9fs_session_info
*v9ses
;
685 name
= dentry
->d_name
.name
;
686 p9_debug(P9_DEBUG_VFS
, "%lu,%s,%s\n", dir
->i_ino
, name
, symname
);
687 v9ses
= v9fs_inode2v9ses(dir
);
689 dfid
= v9fs_parent_fid(dentry
);
692 p9_debug(P9_DEBUG_VFS
, "fid lookup failed %d\n", err
);
696 gid
= v9fs_get_fsgid_for_create(dir
);
698 /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
699 err
= p9_client_symlink(dfid
, name
, symname
, gid
, &qid
);
702 p9_debug(P9_DEBUG_VFS
, "p9_client_symlink failed %d\n", err
);
706 v9fs_invalidate_inode_attr(dir
);
707 if (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
) {
708 /* Now walk from the parent so we can get an unopened fid. */
709 fid
= p9_client_walk(dfid
, 1, &name
, 1);
712 p9_debug(P9_DEBUG_VFS
, "p9_client_walk failed %d\n",
718 /* instantiate inode and assign the unopened fid to dentry */
719 inode
= v9fs_get_new_inode_from_fid(v9ses
, fid
, dir
->i_sb
);
721 err
= PTR_ERR(inode
);
722 p9_debug(P9_DEBUG_VFS
, "inode creation failed %d\n",
726 v9fs_fid_add(dentry
, fid
);
727 d_instantiate(dentry
, inode
);
731 /* Not in cached mode. No need to populate inode with stat */
732 inode
= v9fs_get_inode(dir
->i_sb
, S_IFLNK
, 0);
734 err
= PTR_ERR(inode
);
737 d_instantiate(dentry
, inode
);
742 p9_client_clunk(fid
);
748 * v9fs_vfs_link_dotl - create a hardlink for dotl
749 * @old_dentry: dentry for file to link to
750 * @dir: inode destination for new link
751 * @dentry: dentry for link
756 v9fs_vfs_link_dotl(struct dentry
*old_dentry
, struct inode
*dir
,
757 struct dentry
*dentry
)
760 struct p9_fid
*dfid
, *oldfid
;
761 struct v9fs_session_info
*v9ses
;
763 p9_debug(P9_DEBUG_VFS
, "dir ino: %lu, old_name: %pd, new_name: %pd\n",
764 dir
->i_ino
, old_dentry
, dentry
);
766 v9ses
= v9fs_inode2v9ses(dir
);
767 dfid
= v9fs_parent_fid(dentry
);
769 return PTR_ERR(dfid
);
771 oldfid
= v9fs_fid_lookup(old_dentry
);
773 return PTR_ERR(oldfid
);
775 err
= p9_client_link(dfid
, oldfid
, dentry
->d_name
.name
);
778 p9_debug(P9_DEBUG_VFS
, "p9_client_link failed %d\n", err
);
782 v9fs_invalidate_inode_attr(dir
);
783 if (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
) {
784 /* Get the latest stat info from server. */
786 fid
= v9fs_fid_lookup(old_dentry
);
790 v9fs_refresh_inode_dotl(fid
, d_inode(old_dentry
));
792 ihold(d_inode(old_dentry
));
793 d_instantiate(dentry
, d_inode(old_dentry
));
799 * v9fs_vfs_mknod_dotl - create a special file
800 * @dir: inode destination for new link
801 * @dentry: dentry for file
802 * @omode: mode for creation
803 * @rdev: device associated with special file
807 v9fs_vfs_mknod_dotl(struct inode
*dir
, struct dentry
*dentry
, umode_t omode
,
812 const unsigned char *name
;
814 struct v9fs_session_info
*v9ses
;
815 struct p9_fid
*fid
= NULL
, *dfid
= NULL
;
818 struct posix_acl
*dacl
= NULL
, *pacl
= NULL
;
820 p9_debug(P9_DEBUG_VFS
, " %lu,%pd mode: %hx MAJOR: %u MINOR: %u\n",
821 dir
->i_ino
, dentry
, omode
,
822 MAJOR(rdev
), MINOR(rdev
));
824 v9ses
= v9fs_inode2v9ses(dir
);
825 dfid
= v9fs_parent_fid(dentry
);
828 p9_debug(P9_DEBUG_VFS
, "fid lookup failed %d\n", err
);
833 gid
= v9fs_get_fsgid_for_create(dir
);
835 /* Update mode based on ACL value */
836 err
= v9fs_acl_mode(dir
, &mode
, &dacl
, &pacl
);
838 p9_debug(P9_DEBUG_VFS
, "Failed to get acl values in mknod %d\n",
842 name
= dentry
->d_name
.name
;
844 err
= p9_client_mknod_dotl(dfid
, name
, mode
, rdev
, gid
, &qid
);
848 v9fs_invalidate_inode_attr(dir
);
849 fid
= p9_client_walk(dfid
, 1, &name
, 1);
852 p9_debug(P9_DEBUG_VFS
, "p9_client_walk failed %d\n",
858 /* instantiate inode and assign the unopened fid to the dentry */
859 if (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
) {
860 inode
= v9fs_get_new_inode_from_fid(v9ses
, fid
, dir
->i_sb
);
862 err
= PTR_ERR(inode
);
863 p9_debug(P9_DEBUG_VFS
, "inode creation failed %d\n",
867 v9fs_set_create_acl(inode
, fid
, dacl
, pacl
);
868 v9fs_fid_add(dentry
, fid
);
869 d_instantiate(dentry
, inode
);
874 * Not in cached mode. No need to populate inode with stat.
875 * socket syscall returns a fd, so we need instantiate
877 inode
= v9fs_get_inode(dir
->i_sb
, mode
, rdev
);
879 err
= PTR_ERR(inode
);
882 v9fs_set_create_acl(inode
, fid
, dacl
, pacl
);
883 d_instantiate(dentry
, inode
);
887 p9_client_clunk(fid
);
888 v9fs_put_acl(dacl
, pacl
);
893 * v9fs_vfs_get_link_dotl - follow a symlink path
894 * @dentry: dentry for symlink
895 * @inode: inode for symlink
896 * @done: destructor for return value
900 v9fs_vfs_get_link_dotl(struct dentry
*dentry
,
902 struct delayed_call
*done
)
909 return ERR_PTR(-ECHILD
);
911 p9_debug(P9_DEBUG_VFS
, "%pd\n", dentry
);
913 fid
= v9fs_fid_lookup(dentry
);
915 return ERR_CAST(fid
);
916 retval
= p9_client_readlink(fid
, &target
);
918 return ERR_PTR(retval
);
919 set_delayed_call(done
, kfree_link
, target
);
923 int v9fs_refresh_inode_dotl(struct p9_fid
*fid
, struct inode
*inode
)
925 struct p9_stat_dotl
*st
;
926 struct v9fs_session_info
*v9ses
;
929 v9ses
= v9fs_inode2v9ses(inode
);
930 st
= p9_client_getattr_dotl(fid
, P9_STATS_ALL
);
934 * Don't update inode if the file type is different
936 if ((inode
->i_mode
& S_IFMT
) != (st
->st_mode
& S_IFMT
))
940 * We don't want to refresh inode->i_size,
941 * because we may have cached data
943 flags
= (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
) ?
944 V9FS_STAT2INODE_KEEP_ISIZE
: 0;
945 v9fs_stat2inode_dotl(st
, inode
, flags
);
951 const struct inode_operations v9fs_dir_inode_operations_dotl
= {
952 .create
= v9fs_vfs_create_dotl
,
953 .atomic_open
= v9fs_vfs_atomic_open_dotl
,
954 .lookup
= v9fs_vfs_lookup
,
955 .link
= v9fs_vfs_link_dotl
,
956 .symlink
= v9fs_vfs_symlink_dotl
,
957 .unlink
= v9fs_vfs_unlink
,
958 .mkdir
= v9fs_vfs_mkdir_dotl
,
959 .rmdir
= v9fs_vfs_rmdir
,
960 .mknod
= v9fs_vfs_mknod_dotl
,
961 .rename
= v9fs_vfs_rename
,
962 .getattr
= v9fs_vfs_getattr_dotl
,
963 .setattr
= v9fs_vfs_setattr_dotl
,
964 .listxattr
= v9fs_listxattr
,
965 .get_acl
= v9fs_iop_get_acl
,
968 const struct inode_operations v9fs_file_inode_operations_dotl
= {
969 .getattr
= v9fs_vfs_getattr_dotl
,
970 .setattr
= v9fs_vfs_setattr_dotl
,
971 .listxattr
= v9fs_listxattr
,
972 .get_acl
= v9fs_iop_get_acl
,
975 const struct inode_operations v9fs_symlink_inode_operations_dotl
= {
976 .get_link
= v9fs_vfs_get_link_dotl
,
977 .getattr
= v9fs_vfs_getattr_dotl
,
978 .setattr
= v9fs_vfs_setattr_dotl
,
979 .listxattr
= v9fs_listxattr
,