1 // SPDX-License-Identifier: LGPL-2.1
4 * Copyright (C) International Business Machines Corp., 2002,2010
9 #include <linux/stat.h>
10 #include <linux/slab.h>
11 #include <linux/pagemap.h>
12 #include <linux/freezer.h>
13 #include <linux/sched/signal.h>
14 #include <linux/wait_bit.h>
15 #include <linux/fiemap.h>
16 #include <asm/div64.h>
20 #include "cifsproto.h"
21 #include "smb2proto.h"
22 #include "cifs_debug.h"
23 #include "cifs_fs_sb.h"
24 #include "cifs_unicode.h"
26 #include "fs_context.h"
27 #include "cifs_ioctl.h"
29 static void cifs_set_ops(struct inode *inode)
31 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
33 switch (inode->i_mode & S_IFMT) {
35 inode->i_op = &cifs_file_inode_ops;
36 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
37 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
38 inode->i_fop = &cifs_file_direct_nobrl_ops;
40 inode->i_fop = &cifs_file_direct_ops;
41 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) {
42 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
43 inode->i_fop = &cifs_file_strict_nobrl_ops;
45 inode->i_fop = &cifs_file_strict_ops;
46 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
47 inode->i_fop = &cifs_file_nobrl_ops;
48 else { /* not direct, send byte range locks */
49 inode->i_fop = &cifs_file_ops;
52 /* check if server can support readahead */
53 if (cifs_sb_master_tcon(cifs_sb)->ses->server->max_read <
54 PAGE_SIZE + MAX_CIFS_HDR_SIZE)
55 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
57 inode->i_data.a_ops = &cifs_addr_ops;
60 #ifdef CONFIG_CIFS_DFS_UPCALL
61 if (IS_AUTOMOUNT(inode)) {
62 inode->i_op = &cifs_dfs_referral_inode_operations;
64 #else /* NO DFS support, treat as a directory */
67 inode->i_op = &cifs_dir_inode_ops;
68 inode->i_fop = &cifs_dir_ops;
72 inode->i_op = &cifs_symlink_inode_ops;
75 init_special_inode(inode, inode->i_mode, inode->i_rdev);
80 /* check inode attributes against fattr. If they don't match, tag the
81 * inode for cache invalidation
84 cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr)
86 struct cifs_fscache_inode_coherency_data cd;
87 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
89 cifs_dbg(FYI, "%s: revalidating inode %llu\n",
90 __func__, cifs_i->uniqueid);
92 if (inode->i_state & I_NEW) {
93 cifs_dbg(FYI, "%s: inode %llu is new\n",
94 __func__, cifs_i->uniqueid);
98 /* don't bother with revalidation if we have an oplock */
99 if (CIFS_CACHE_READ(cifs_i)) {
100 cifs_dbg(FYI, "%s: inode %llu is oplocked\n",
101 __func__, cifs_i->uniqueid);
105 /* revalidate if mtime or size have changed */
106 fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode);
107 if (timespec64_equal(&inode->i_mtime, &fattr->cf_mtime) &&
108 cifs_i->server_eof == fattr->cf_eof) {
109 cifs_dbg(FYI, "%s: inode %llu is unchanged\n",
110 __func__, cifs_i->uniqueid);
114 cifs_dbg(FYI, "%s: invalidating inode %llu mapping\n",
115 __func__, cifs_i->uniqueid);
116 set_bit(CIFS_INO_INVALID_MAPPING, &cifs_i->flags);
117 /* Invalidate fscache cookie */
118 cifs_fscache_fill_coherency(&cifs_i->netfs.inode, &cd);
119 fscache_invalidate(cifs_inode_cookie(inode), &cd, i_size_read(inode), 0);
123 * copy nlink to the inode, unless it wasn't provided. Provide
124 * sane values if we don't have an existing one and none was provided
127 cifs_nlink_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
130 * if we're in a situation where we can't trust what we
131 * got from the server (readdir, some non-unix cases)
132 * fake reasonable values
134 if (fattr->cf_flags & CIFS_FATTR_UNKNOWN_NLINK) {
135 /* only provide fake values on a new inode */
136 if (inode->i_state & I_NEW) {
137 if (fattr->cf_cifsattrs & ATTR_DIRECTORY)
145 /* we trust the server, so update it */
146 set_nlink(inode, fattr->cf_nlink);
149 /* populate an inode with info from a cifs_fattr struct */
151 cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
153 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
154 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
156 if (!(inode->i_state & I_NEW) &&
157 unlikely(inode_wrong_type(inode, fattr->cf_mode))) {
158 CIFS_I(inode)->time = 0; /* force reval */
162 cifs_revalidate_cache(inode, fattr);
164 spin_lock(&inode->i_lock);
165 fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode);
166 fattr->cf_atime = timestamp_truncate(fattr->cf_atime, inode);
167 fattr->cf_ctime = timestamp_truncate(fattr->cf_ctime, inode);
168 /* we do not want atime to be less than mtime, it broke some apps */
169 if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime) < 0)
170 inode->i_atime = fattr->cf_mtime;
172 inode->i_atime = fattr->cf_atime;
173 inode->i_mtime = fattr->cf_mtime;
174 inode->i_ctime = fattr->cf_ctime;
175 inode->i_rdev = fattr->cf_rdev;
176 cifs_nlink_fattr_to_inode(inode, fattr);
177 inode->i_uid = fattr->cf_uid;
178 inode->i_gid = fattr->cf_gid;
180 /* if dynperm is set, don't clobber existing mode */
181 if (inode->i_state & I_NEW ||
182 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM))
183 inode->i_mode = fattr->cf_mode;
185 cifs_i->cifsAttrs = fattr->cf_cifsattrs;
187 if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)
190 cifs_i->time = jiffies;
192 if (fattr->cf_flags & CIFS_FATTR_DELETE_PENDING)
193 set_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
195 clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
197 cifs_i->server_eof = fattr->cf_eof;
199 * Can't safely change the file size here if the client is writing to
200 * it due to potential races.
202 if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) {
203 i_size_write(inode, fattr->cf_eof);
206 * i_blocks is not related to (i_size / i_blksize),
207 * but instead 512 byte (2**9) size is required for
208 * calculating num blocks.
210 inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9;
212 spin_unlock(&inode->i_lock);
214 if (fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL)
215 inode->i_flags |= S_AUTOMOUNT;
216 if (inode->i_state & I_NEW)
222 cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr)
224 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
226 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
229 fattr->cf_uniqueid = iunique(sb, ROOT_I);
232 /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */
234 cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info,
235 struct cifs_sb_info *cifs_sb)
237 memset(fattr, 0, sizeof(*fattr));
238 fattr->cf_uniqueid = le64_to_cpu(info->UniqueId);
239 fattr->cf_bytes = le64_to_cpu(info->NumOfBytes);
240 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
242 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
243 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime);
244 fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange);
245 /* old POSIX extensions don't get create time */
247 fattr->cf_mode = le64_to_cpu(info->Permissions);
250 * Since we set the inode type below we need to mask off
251 * to avoid strange results if bits set above.
253 fattr->cf_mode &= ~S_IFMT;
254 switch (le32_to_cpu(info->Type)) {
256 fattr->cf_mode |= S_IFREG;
257 fattr->cf_dtype = DT_REG;
260 fattr->cf_mode |= S_IFLNK;
261 fattr->cf_dtype = DT_LNK;
264 fattr->cf_mode |= S_IFDIR;
265 fattr->cf_dtype = DT_DIR;
268 fattr->cf_mode |= S_IFCHR;
269 fattr->cf_dtype = DT_CHR;
270 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
271 le64_to_cpu(info->DevMinor) & MINORMASK);
274 fattr->cf_mode |= S_IFBLK;
275 fattr->cf_dtype = DT_BLK;
276 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
277 le64_to_cpu(info->DevMinor) & MINORMASK);
280 fattr->cf_mode |= S_IFIFO;
281 fattr->cf_dtype = DT_FIFO;
284 fattr->cf_mode |= S_IFSOCK;
285 fattr->cf_dtype = DT_SOCK;
288 /* safest to call it a file if we do not know */
289 fattr->cf_mode |= S_IFREG;
290 fattr->cf_dtype = DT_REG;
291 cifs_dbg(FYI, "unknown type %d\n", le32_to_cpu(info->Type));
295 fattr->cf_uid = cifs_sb->ctx->linux_uid;
296 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) {
297 u64 id = le64_to_cpu(info->Uid);
298 if (id < ((uid_t)-1)) {
299 kuid_t uid = make_kuid(&init_user_ns, id);
305 fattr->cf_gid = cifs_sb->ctx->linux_gid;
306 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) {
307 u64 id = le64_to_cpu(info->Gid);
308 if (id < ((gid_t)-1)) {
309 kgid_t gid = make_kgid(&init_user_ns, id);
315 fattr->cf_nlink = le64_to_cpu(info->Nlinks);
319 * Fill a cifs_fattr struct with fake inode info.
321 * Needed to setup cifs_fattr data for the directory which is the
322 * junction to the new submount (ie to setup the fake directory
323 * which represents a DFS referral).
326 cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb)
328 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
330 cifs_dbg(FYI, "creating fake fattr for DFS referral\n");
332 memset(fattr, 0, sizeof(*fattr));
333 fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU;
334 fattr->cf_uid = cifs_sb->ctx->linux_uid;
335 fattr->cf_gid = cifs_sb->ctx->linux_gid;
336 ktime_get_coarse_real_ts64(&fattr->cf_mtime);
337 fattr->cf_atime = fattr->cf_ctime = fattr->cf_mtime;
339 fattr->cf_flags = CIFS_FATTR_DFS_REFERRAL;
343 cifs_get_file_info_unix(struct file *filp)
347 FILE_UNIX_BASIC_INFO find_data;
348 struct cifs_fattr fattr;
349 struct inode *inode = file_inode(filp);
350 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
351 struct cifsFileInfo *cfile = filp->private_data;
352 struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
355 rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data);
357 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
358 } else if (rc == -EREMOTE) {
359 cifs_create_dfs_fattr(&fattr, inode->i_sb);
362 goto cifs_gfiunix_out;
364 rc = cifs_fattr_to_inode(inode, &fattr);
371 int cifs_get_inode_info_unix(struct inode **pinode,
372 const unsigned char *full_path,
373 struct super_block *sb, unsigned int xid)
376 FILE_UNIX_BASIC_INFO find_data;
377 struct cifs_fattr fattr;
378 struct cifs_tcon *tcon;
379 struct tcon_link *tlink;
380 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
382 cifs_dbg(FYI, "Getting info on %s\n", full_path);
384 tlink = cifs_sb_tlink(cifs_sb);
386 return PTR_ERR(tlink);
387 tcon = tlink_tcon(tlink);
389 /* could have done a find first instead but this returns more info */
390 rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data,
391 cifs_sb->local_nls, cifs_remap(cifs_sb));
392 cifs_put_tlink(tlink);
395 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
396 } else if (rc == -EREMOTE) {
397 cifs_create_dfs_fattr(&fattr, sb);
403 /* check for Minshall+French symlinks */
404 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
405 int tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
408 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
411 if (*pinode == NULL) {
413 cifs_fill_uniqueid(sb, &fattr);
414 *pinode = cifs_iget(sb, &fattr);
418 /* we already have inode, update it */
420 /* if uniqueid is different, return error */
421 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
422 CIFS_I(*pinode)->uniqueid != fattr.cf_uniqueid)) {
423 CIFS_I(*pinode)->time = 0; /* force reval */
428 /* if filetype is different, return error */
429 rc = cifs_fattr_to_inode(*pinode, &fattr);
437 cifs_sfu_type(struct cifs_fattr *fattr, const char *path,
438 struct cifs_sb_info *cifs_sb, unsigned int xid)
442 struct tcon_link *tlink;
443 struct cifs_tcon *tcon;
445 struct cifs_open_parms oparms;
446 struct cifs_io_parms io_parms = {0};
448 unsigned int bytes_read;
450 int buf_type = CIFS_NO_BUFFER;
454 fattr->cf_mode &= ~S_IFMT;
456 if (fattr->cf_eof == 0) {
457 fattr->cf_mode |= S_IFIFO;
458 fattr->cf_dtype = DT_FIFO;
460 } else if (fattr->cf_eof < 8) {
461 fattr->cf_mode |= S_IFREG;
462 fattr->cf_dtype = DT_REG;
463 return -EINVAL; /* EOPNOTSUPP? */
466 tlink = cifs_sb_tlink(cifs_sb);
468 return PTR_ERR(tlink);
469 tcon = tlink_tcon(tlink);
472 oparms.cifs_sb = cifs_sb;
473 oparms.desired_access = GENERIC_READ;
474 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
475 oparms.disposition = FILE_OPEN;
478 oparms.reconnect = false;
480 if (tcon->ses->server->oplocks)
484 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, NULL);
486 cifs_dbg(FYI, "check sfu type of %s, open rc = %d\n", path, rc);
487 cifs_put_tlink(tlink);
492 io_parms.netfid = fid.netfid;
493 io_parms.pid = current->tgid;
494 io_parms.tcon = tcon;
496 io_parms.length = 24;
498 rc = tcon->ses->server->ops->sync_read(xid, &fid, &io_parms,
499 &bytes_read, &pbuf, &buf_type);
500 if ((rc == 0) && (bytes_read >= 8)) {
501 if (memcmp("IntxBLK", pbuf, 8) == 0) {
502 cifs_dbg(FYI, "Block device\n");
503 fattr->cf_mode |= S_IFBLK;
504 fattr->cf_dtype = DT_BLK;
505 if (bytes_read == 24) {
506 /* we have enough to decode dev num */
507 __u64 mjr; /* major */
508 __u64 mnr; /* minor */
509 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
510 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
511 fattr->cf_rdev = MKDEV(mjr, mnr);
513 } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
514 cifs_dbg(FYI, "Char device\n");
515 fattr->cf_mode |= S_IFCHR;
516 fattr->cf_dtype = DT_CHR;
517 if (bytes_read == 24) {
518 /* we have enough to decode dev num */
519 __u64 mjr; /* major */
520 __u64 mnr; /* minor */
521 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
522 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
523 fattr->cf_rdev = MKDEV(mjr, mnr);
525 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
526 cifs_dbg(FYI, "Symlink\n");
527 fattr->cf_mode |= S_IFLNK;
528 fattr->cf_dtype = DT_LNK;
530 fattr->cf_mode |= S_IFREG; /* file? */
531 fattr->cf_dtype = DT_REG;
535 fattr->cf_mode |= S_IFREG; /* then it is a file */
536 fattr->cf_dtype = DT_REG;
537 rc = -EOPNOTSUPP; /* or some unknown SFU type */
540 tcon->ses->server->ops->close(xid, tcon, &fid);
541 cifs_put_tlink(tlink);
545 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
548 * Fetch mode bits as provided by SFU.
550 * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ?
552 static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path,
553 struct cifs_sb_info *cifs_sb, unsigned int xid)
555 #ifdef CONFIG_CIFS_XATTR
559 struct tcon_link *tlink;
560 struct cifs_tcon *tcon;
562 tlink = cifs_sb_tlink(cifs_sb);
564 return PTR_ERR(tlink);
565 tcon = tlink_tcon(tlink);
567 if (tcon->ses->server->ops->query_all_EAs == NULL) {
568 cifs_put_tlink(tlink);
572 rc = tcon->ses->server->ops->query_all_EAs(xid, tcon, path,
573 "SETFILEBITS", ea_value, 4 /* size of buf */,
575 cifs_put_tlink(tlink);
579 mode = le32_to_cpu(*((__le32 *)ea_value));
580 fattr->cf_mode &= ~SFBITS_MASK;
581 cifs_dbg(FYI, "special bits 0%o org mode 0%o\n",
582 mode, fattr->cf_mode);
583 fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode;
584 cifs_dbg(FYI, "special mode bits 0%o\n", mode);
593 /* Fill a cifs_fattr struct with info from POSIX info struct */
595 smb311_posix_info_to_fattr(struct cifs_fattr *fattr, struct smb311_posix_qinfo *info,
596 struct super_block *sb, bool adjust_tz, bool symlink)
598 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
599 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
601 memset(fattr, 0, sizeof(*fattr));
603 /* no fattr->flags to set */
604 fattr->cf_cifsattrs = le32_to_cpu(info->DosAttributes);
605 fattr->cf_uniqueid = le64_to_cpu(info->Inode);
607 if (info->LastAccessTime)
608 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
610 ktime_get_coarse_real_ts64(&fattr->cf_atime);
612 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
613 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
616 fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj;
617 fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj;
620 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
621 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
622 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
624 fattr->cf_nlink = le32_to_cpu(info->HardLinks);
625 fattr->cf_mode = (umode_t) le32_to_cpu(info->Mode);
626 /* The srv fs device id is overridden on network mount so setting rdev isn't needed here */
627 /* fattr->cf_rdev = le32_to_cpu(info->DeviceId); */
630 fattr->cf_mode |= S_IFLNK;
631 fattr->cf_dtype = DT_LNK;
632 } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
633 fattr->cf_mode |= S_IFDIR;
634 fattr->cf_dtype = DT_DIR;
636 fattr->cf_mode |= S_IFREG;
637 fattr->cf_dtype = DT_REG;
639 /* else if reparse point ... TODO: add support for FIFO and blk dev; special file types */
641 fattr->cf_uid = cifs_sb->ctx->linux_uid; /* TODO: map uid and gid from SID */
642 fattr->cf_gid = cifs_sb->ctx->linux_gid;
644 cifs_dbg(FYI, "POSIX query info: mode 0x%x uniqueid 0x%llx nlink %d\n",
645 fattr->cf_mode, fattr->cf_uniqueid, fattr->cf_nlink);
649 /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */
651 cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info,
652 struct super_block *sb, bool adjust_tz,
653 bool symlink, u32 reparse_tag)
655 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
656 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
658 memset(fattr, 0, sizeof(*fattr));
659 fattr->cf_cifsattrs = le32_to_cpu(info->Attributes);
660 if (info->DeletePending)
661 fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING;
663 if (info->LastAccessTime)
664 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
666 ktime_get_coarse_real_ts64(&fattr->cf_atime);
668 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
669 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
672 fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj;
673 fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj;
676 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
677 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
678 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
680 fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks);
681 if (reparse_tag == IO_REPARSE_TAG_LX_SYMLINK) {
682 fattr->cf_mode |= S_IFLNK | cifs_sb->ctx->file_mode;
683 fattr->cf_dtype = DT_LNK;
684 } else if (reparse_tag == IO_REPARSE_TAG_LX_FIFO) {
685 fattr->cf_mode |= S_IFIFO | cifs_sb->ctx->file_mode;
686 fattr->cf_dtype = DT_FIFO;
687 } else if (reparse_tag == IO_REPARSE_TAG_AF_UNIX) {
688 fattr->cf_mode |= S_IFSOCK | cifs_sb->ctx->file_mode;
689 fattr->cf_dtype = DT_SOCK;
690 } else if (reparse_tag == IO_REPARSE_TAG_LX_CHR) {
691 fattr->cf_mode |= S_IFCHR | cifs_sb->ctx->file_mode;
692 fattr->cf_dtype = DT_CHR;
693 } else if (reparse_tag == IO_REPARSE_TAG_LX_BLK) {
694 fattr->cf_mode |= S_IFBLK | cifs_sb->ctx->file_mode;
695 fattr->cf_dtype = DT_BLK;
696 } else if (symlink) { /* TODO add more reparse tag checks */
697 fattr->cf_mode = S_IFLNK;
698 fattr->cf_dtype = DT_LNK;
699 } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
700 fattr->cf_mode = S_IFDIR | cifs_sb->ctx->dir_mode;
701 fattr->cf_dtype = DT_DIR;
703 * Server can return wrong NumberOfLinks value for directories
704 * when Unix extensions are disabled - fake it.
707 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
709 fattr->cf_mode = S_IFREG | cifs_sb->ctx->file_mode;
710 fattr->cf_dtype = DT_REG;
712 /* clear write bits if ATTR_READONLY is set */
713 if (fattr->cf_cifsattrs & ATTR_READONLY)
714 fattr->cf_mode &= ~(S_IWUGO);
717 * Don't accept zero nlink from non-unix servers unless
718 * delete is pending. Instead mark it as unknown.
720 if ((fattr->cf_nlink < 1) && !tcon->unix_ext &&
721 !info->DeletePending) {
722 cifs_dbg(VFS, "bogus file nlink value %u\n",
724 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
728 fattr->cf_uid = cifs_sb->ctx->linux_uid;
729 fattr->cf_gid = cifs_sb->ctx->linux_gid;
733 cifs_get_file_info(struct file *filp)
737 FILE_ALL_INFO find_data;
738 struct cifs_fattr fattr;
739 struct inode *inode = file_inode(filp);
740 struct cifsFileInfo *cfile = filp->private_data;
741 struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
742 struct TCP_Server_Info *server = tcon->ses->server;
744 if (!server->ops->query_file_info)
748 rc = server->ops->query_file_info(xid, tcon, &cfile->fid, &find_data);
751 /* TODO: add support to query reparse tag */
752 cifs_all_info_to_fattr(&fattr, &find_data, inode->i_sb, false,
753 false, 0 /* no reparse tag */);
756 cifs_create_dfs_fattr(&fattr, inode->i_sb);
762 * FIXME: legacy server -- fall back to path-based call?
763 * for now, just skip revalidating and mark inode for
767 CIFS_I(inode)->time = 0;
774 * don't bother with SFU junk here -- just mark inode as needing
777 fattr.cf_uniqueid = CIFS_I(inode)->uniqueid;
778 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
779 /* if filetype is different, return error */
780 rc = cifs_fattr_to_inode(inode, &fattr);
786 /* Simple function to return a 64 bit hash of string. Rarely called */
787 static __u64 simple_hashstr(const char *str)
789 const __u64 hash_mult = 1125899906842597ULL; /* a big enough prime */
793 hash = (hash + (__u64) *str++) * hash_mult;
799 * cifs_backup_query_path_info - SMB1 fallback code to get ino
801 * Fallback code to get file metadata when we don't have access to
802 * full_path (EACCES) and have backup creds.
804 * @xid: transaction id used to identify original request in logs
805 * @tcon: information about the server share we have mounted
806 * @sb: the superblock stores info such as disk space available
807 * @full_path: name of the file we are getting the metadata for
808 * @resp_buf: will be set to cifs resp buf and needs to be freed with
809 * cifs_buf_release() when done with @data
810 * @data: will be set to search info result buffer
813 cifs_backup_query_path_info(int xid,
814 struct cifs_tcon *tcon,
815 struct super_block *sb,
816 const char *full_path,
818 FILE_ALL_INFO **data)
820 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
821 struct cifs_search_info info = {0};
826 info.endOfSearch = false;
828 info.info_level = SMB_FIND_FILE_UNIX;
829 else if ((tcon->ses->capabilities &
830 tcon->ses->server->vals->cap_nt_find) == 0)
831 info.info_level = SMB_FIND_FILE_INFO_STANDARD;
832 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
833 info.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
834 else /* no srvino useful for fallback to some netapp */
835 info.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
837 flags = CIFS_SEARCH_CLOSE_ALWAYS |
838 CIFS_SEARCH_CLOSE_AT_END |
839 CIFS_SEARCH_BACKUP_SEARCH;
841 rc = CIFSFindFirst(xid, tcon, full_path,
842 cifs_sb, NULL, flags, &info, false);
846 *resp_buf = (void *)info.ntwrk_buf_start;
847 *data = (FILE_ALL_INFO *)info.srch_entries_start;
852 cifs_set_fattr_ino(int xid,
853 struct cifs_tcon *tcon,
854 struct super_block *sb,
855 struct inode **inode,
856 const char *full_path,
858 struct cifs_fattr *fattr)
860 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
861 struct TCP_Server_Info *server = tcon->ses->server;
864 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
866 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
868 fattr->cf_uniqueid = iunique(sb, ROOT_I);
873 * If we have an inode pass a NULL tcon to ensure we don't
874 * make a round trip to the server. This only works for SMB2+.
876 rc = server->ops->get_srv_inum(xid,
877 *inode ? NULL : tcon,
883 * If that fails reuse existing ino or generate one
884 * and disable server ones
887 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
889 fattr->cf_uniqueid = iunique(sb, ROOT_I);
890 cifs_autodisable_serverino(cifs_sb);
895 /* If no errors, check for zero root inode (invalid) */
896 if (fattr->cf_uniqueid == 0 && strlen(full_path) == 0) {
897 cifs_dbg(FYI, "Invalid (0) inodenum\n");
900 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
902 /* make an ino by hashing the UNC */
903 fattr->cf_flags |= CIFS_FATTR_FAKE_ROOT_INO;
904 fattr->cf_uniqueid = simple_hashstr(tcon->treeName);
909 static inline bool is_inode_cache_good(struct inode *ino)
911 return ino && CIFS_CACHE_READ(CIFS_I(ino)) && CIFS_I(ino)->time != 0;
915 cifs_get_inode_info(struct inode **inode,
916 const char *full_path,
917 FILE_ALL_INFO *in_data,
918 struct super_block *sb, int xid,
919 const struct cifs_fid *fid)
922 struct cifs_tcon *tcon;
923 struct TCP_Server_Info *server;
924 struct tcon_link *tlink;
925 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
926 bool adjust_tz = false;
927 struct cifs_fattr fattr = {0};
928 bool is_reparse_point = false;
929 FILE_ALL_INFO *data = in_data;
930 FILE_ALL_INFO *tmp_data = NULL;
931 void *smb1_backup_rsp_buf = NULL;
934 __u32 reparse_tag = 0;
936 tlink = cifs_sb_tlink(cifs_sb);
938 return PTR_ERR(tlink);
939 tcon = tlink_tcon(tlink);
940 server = tcon->ses->server;
943 * 1. Fetch file metadata if not provided (data)
947 if (is_inode_cache_good(*inode)) {
948 cifs_dbg(FYI, "No need to revalidate cached inode sizes\n");
951 tmp_data = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
956 rc = server->ops->query_path_info(xid, tcon, cifs_sb,
958 &adjust_tz, &is_reparse_point);
959 #ifdef CONFIG_CIFS_DFS_UPCALL
960 if (rc == -ENOENT && is_tcon_dfs(tcon))
961 rc = cifs_dfs_query_info_nonascii_quirk(xid, tcon,
969 * 2. Convert it to internal cifs metadata (fattr)
975 * If the file is a reparse point, it is more complicated
976 * since we have to check if its reparse tag matches a known
977 * special file type e.g. symlink or fifo or char etc.
979 if ((le32_to_cpu(data->Attributes) & ATTR_REPARSE) &&
980 server->ops->query_reparse_tag) {
981 rc = server->ops->query_reparse_tag(xid, tcon, cifs_sb,
982 full_path, &reparse_tag);
983 cifs_dbg(FYI, "reparse tag 0x%x\n", reparse_tag);
985 cifs_all_info_to_fattr(&fattr, data, sb, adjust_tz,
986 is_reparse_point, reparse_tag);
989 /* DFS link, no metadata available on this server */
990 cifs_create_dfs_fattr(&fattr, sb);
995 * perm errors, try again with backup flags if possible
997 * For SMB2 and later the backup intent flag
998 * is already sent if needed on open and there
999 * is no path based FindFirst operation to use
1002 if (backup_cred(cifs_sb) && is_smb1_server(server)) {
1003 /* for easier reading */
1004 FILE_DIRECTORY_INFO *fdi;
1005 SEARCH_ID_FULL_DIR_INFO *si;
1007 rc = cifs_backup_query_path_info(xid, tcon, sb,
1009 &smb1_backup_rsp_buf,
1014 fdi = (FILE_DIRECTORY_INFO *)data;
1015 si = (SEARCH_ID_FULL_DIR_INFO *)data;
1017 cifs_dir_info_to_fattr(&fattr, fdi, cifs_sb);
1018 fattr.cf_uniqueid = le64_to_cpu(si->UniqueId);
1019 /* uniqueid set, skip get inum step */
1020 goto handle_mnt_opt;
1022 /* nothing we can do, bail out */
1027 cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc);
1032 * 3. Get or update inode number (fattr.cf_uniqueid)
1035 cifs_set_fattr_ino(xid, tcon, sb, inode, full_path, data, &fattr);
1038 * 4. Tweak fattr based on mount options
1042 /* query for SFU type info if supported and needed */
1043 if (fattr.cf_cifsattrs & ATTR_SYSTEM &&
1044 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
1045 tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid);
1047 cifs_dbg(FYI, "cifs_sfu_type failed: %d\n", tmprc);
1050 /* fill in 0777 bits from ACL */
1051 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) {
1052 rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, true,
1057 cifs_dbg(FYI, "%s: Get mode from SID failed. rc=%d\n",
1061 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
1062 rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, false,
1067 cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n",
1073 /* fill in remaining high mode bits e.g. SUID, VTX */
1074 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
1075 cifs_sfu_mode(&fattr, full_path, cifs_sb, xid);
1077 /* check for Minshall+French symlinks */
1078 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
1079 tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
1082 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
1086 * 5. Update inode with final fattr data
1090 *inode = cifs_iget(sb, &fattr);
1094 /* we already have inode, update it */
1096 /* if uniqueid is different, return error */
1097 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
1098 CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) {
1099 CIFS_I(*inode)->time = 0; /* force reval */
1103 /* if filetype is different, return error */
1104 rc = cifs_fattr_to_inode(*inode, &fattr);
1107 cifs_buf_release(smb1_backup_rsp_buf);
1108 cifs_put_tlink(tlink);
1114 smb311_posix_get_inode_info(struct inode **inode,
1115 const char *full_path,
1116 struct super_block *sb, unsigned int xid)
1118 struct cifs_tcon *tcon;
1119 struct tcon_link *tlink;
1120 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1121 bool adjust_tz = false;
1122 struct cifs_fattr fattr = {0};
1123 bool symlink = false;
1124 struct smb311_posix_qinfo *data = NULL;
1128 tlink = cifs_sb_tlink(cifs_sb);
1130 return PTR_ERR(tlink);
1131 tcon = tlink_tcon(tlink);
1134 * 1. Fetch file metadata
1137 if (is_inode_cache_good(*inode)) {
1138 cifs_dbg(FYI, "No need to revalidate cached inode sizes\n");
1141 data = kmalloc(sizeof(struct smb311_posix_qinfo), GFP_KERNEL);
1147 rc = smb311_posix_query_path_info(xid, tcon, cifs_sb,
1149 &adjust_tz, &symlink);
1152 * 2. Convert it to internal cifs metadata (fattr)
1157 smb311_posix_info_to_fattr(&fattr, data, sb, adjust_tz, symlink);
1160 /* DFS link, no metadata available on this server */
1161 cifs_create_dfs_fattr(&fattr, sb);
1166 * For SMB2 and later the backup intent flag
1167 * is already sent if needed on open and there
1168 * is no path based FindFirst operation to use
1169 * to retry with so nothing we can do, bail out
1173 cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc);
1179 * 3. Tweak fattr based on mount options
1182 /* check for Minshall+French symlinks */
1183 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
1184 tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
1187 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
1191 * 4. Update inode with final fattr data
1195 *inode = cifs_iget(sb, &fattr);
1199 /* we already have inode, update it */
1201 /* if uniqueid is different, return error */
1202 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
1203 CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) {
1204 CIFS_I(*inode)->time = 0; /* force reval */
1209 /* if filetype is different, return error */
1210 rc = cifs_fattr_to_inode(*inode, &fattr);
1213 cifs_put_tlink(tlink);
1219 static const struct inode_operations cifs_ipc_inode_ops = {
1220 .lookup = cifs_lookup,
1224 cifs_find_inode(struct inode *inode, void *opaque)
1226 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
1228 /* don't match inode with different uniqueid */
1229 if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid)
1232 /* use createtime like an i_generation field */
1233 if (CIFS_I(inode)->createtime != fattr->cf_createtime)
1236 /* don't match inode of different type */
1237 if (inode_wrong_type(inode, fattr->cf_mode))
1240 /* if it's not a directory or has no dentries, then flag it */
1241 if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry))
1242 fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
1248 cifs_init_inode(struct inode *inode, void *opaque)
1250 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
1252 CIFS_I(inode)->uniqueid = fattr->cf_uniqueid;
1253 CIFS_I(inode)->createtime = fattr->cf_createtime;
1258 * walk dentry list for an inode and report whether it has aliases that
1259 * are hashed. We use this to determine if a directory inode can actually
1263 inode_has_hashed_dentries(struct inode *inode)
1265 struct dentry *dentry;
1267 spin_lock(&inode->i_lock);
1268 hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
1269 if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
1270 spin_unlock(&inode->i_lock);
1274 spin_unlock(&inode->i_lock);
1278 /* Given fattrs, get a corresponding inode */
1280 cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
1283 struct inode *inode;
1286 cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid);
1288 /* hash down to 32-bits on 32-bit arch */
1289 hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
1291 inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr);
1293 /* was there a potentially problematic inode collision? */
1294 if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) {
1295 fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION;
1297 if (inode_has_hashed_dentries(inode)) {
1298 cifs_autodisable_serverino(CIFS_SB(sb));
1300 fattr->cf_uniqueid = iunique(sb, ROOT_I);
1301 goto retry_iget5_locked;
1305 /* can't fail - see cifs_find_inode() */
1306 cifs_fattr_to_inode(inode, fattr);
1307 if (sb->s_flags & SB_NOATIME)
1308 inode->i_flags |= S_NOATIME | S_NOCMTIME;
1309 if (inode->i_state & I_NEW) {
1310 inode->i_ino = hash;
1311 cifs_fscache_get_inode_cookie(inode);
1312 unlock_new_inode(inode);
1319 /* gets root inode */
1320 struct inode *cifs_root_iget(struct super_block *sb)
1323 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1324 struct inode *inode = NULL;
1326 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
1330 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
1331 && cifs_sb->prepath) {
1332 len = strlen(cifs_sb->prepath);
1333 path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL);
1335 return ERR_PTR(-ENOMEM);
1337 memcpy(path+1, cifs_sb->prepath, len);
1339 path = kstrdup("", GFP_KERNEL);
1341 return ERR_PTR(-ENOMEM);
1345 if (tcon->unix_ext) {
1346 rc = cifs_get_inode_info_unix(&inode, path, sb, xid);
1347 /* some servers mistakenly claim POSIX support */
1348 if (rc != -EOPNOTSUPP)
1350 cifs_dbg(VFS, "server does not support POSIX extensions\n");
1351 tcon->unix_ext = false;
1354 convert_delimiter(path, CIFS_DIR_SEP(cifs_sb));
1355 if (tcon->posix_extensions)
1356 rc = smb311_posix_get_inode_info(&inode, path, sb, xid);
1358 rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL);
1362 inode = ERR_PTR(rc);
1366 if (rc && tcon->pipe) {
1367 cifs_dbg(FYI, "ipc connection - fake read inode\n");
1368 spin_lock(&inode->i_lock);
1369 inode->i_mode |= S_IFDIR;
1370 set_nlink(inode, 2);
1371 inode->i_op = &cifs_ipc_inode_ops;
1372 inode->i_fop = &simple_dir_operations;
1373 inode->i_uid = cifs_sb->ctx->linux_uid;
1374 inode->i_gid = cifs_sb->ctx->linux_gid;
1375 spin_unlock(&inode->i_lock);
1378 inode = ERR_PTR(rc);
1388 cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid,
1389 const char *full_path, __u32 dosattr)
1391 bool set_time = false;
1392 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1393 struct TCP_Server_Info *server;
1394 FILE_BASIC_INFO info_buf;
1399 server = cifs_sb_master_tcon(cifs_sb)->ses->server;
1400 if (!server->ops->set_file_info)
1405 if (attrs->ia_valid & ATTR_ATIME) {
1407 info_buf.LastAccessTime =
1408 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1410 info_buf.LastAccessTime = 0;
1412 if (attrs->ia_valid & ATTR_MTIME) {
1414 info_buf.LastWriteTime =
1415 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1417 info_buf.LastWriteTime = 0;
1420 * Samba throws this field away, but windows may actually use it.
1421 * Do not set ctime unless other time stamps are changed explicitly
1422 * (i.e. by utimes()) since we would then have a mix of client and
1425 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1426 cifs_dbg(FYI, "CIFS - CTIME changed\n");
1427 info_buf.ChangeTime =
1428 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1430 info_buf.ChangeTime = 0;
1432 info_buf.CreationTime = 0; /* don't change */
1433 info_buf.Attributes = cpu_to_le32(dosattr);
1435 return server->ops->set_file_info(inode, full_path, &info_buf, xid);
1439 * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
1440 * and rename it to a random name that hopefully won't conflict with
1444 cifs_rename_pending_delete(const char *full_path, struct dentry *dentry,
1445 const unsigned int xid)
1449 struct cifs_fid fid;
1450 struct cifs_open_parms oparms;
1451 struct inode *inode = d_inode(dentry);
1452 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1453 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1454 struct tcon_link *tlink;
1455 struct cifs_tcon *tcon;
1456 __u32 dosattr, origattr;
1457 FILE_BASIC_INFO *info_buf = NULL;
1459 tlink = cifs_sb_tlink(cifs_sb);
1461 return PTR_ERR(tlink);
1462 tcon = tlink_tcon(tlink);
1465 * We cannot rename the file if the server doesn't support
1466 * CAP_INFOLEVEL_PASSTHRU
1468 if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) {
1474 oparms.cifs_sb = cifs_sb;
1475 oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES;
1476 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
1477 oparms.disposition = FILE_OPEN;
1478 oparms.path = full_path;
1480 oparms.reconnect = false;
1482 rc = CIFS_open(xid, &oparms, &oplock, NULL);
1486 origattr = cifsInode->cifsAttrs;
1488 origattr |= ATTR_NORMAL;
1490 dosattr = origattr & ~ATTR_READONLY;
1492 dosattr |= ATTR_NORMAL;
1493 dosattr |= ATTR_HIDDEN;
1495 /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
1496 if (dosattr != origattr) {
1497 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
1498 if (info_buf == NULL) {
1502 info_buf->Attributes = cpu_to_le32(dosattr);
1503 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1505 /* although we would like to mark the file hidden
1506 if that fails we will still try to rename it */
1508 cifsInode->cifsAttrs = dosattr;
1510 dosattr = origattr; /* since not able to change them */
1513 /* rename the file */
1514 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL,
1516 cifs_remap(cifs_sb));
1522 /* try to set DELETE_ON_CLOSE */
1523 if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) {
1524 rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid,
1527 * some samba versions return -ENOENT when we try to set the
1528 * file disposition here. Likely a samba bug, but work around
1529 * it for now. This means that some cifsXXX files may hang
1530 * around after they shouldn't.
1532 * BB: remove this hack after more servers have the fix
1540 set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags);
1544 CIFSSMBClose(xid, tcon, fid.netfid);
1547 cifs_put_tlink(tlink);
1551 * reset everything back to the original state. Don't bother
1552 * dealing with errors here since we can't do anything about
1556 CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name,
1557 cifs_sb->local_nls, cifs_remap(cifs_sb));
1559 if (dosattr != origattr) {
1560 info_buf->Attributes = cpu_to_le32(origattr);
1561 if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1563 cifsInode->cifsAttrs = origattr;
1569 /* copied from fs/nfs/dir.c with small changes */
1571 cifs_drop_nlink(struct inode *inode)
1573 spin_lock(&inode->i_lock);
1574 if (inode->i_nlink > 0)
1576 spin_unlock(&inode->i_lock);
1580 * If d_inode(dentry) is null (usually meaning the cached dentry
1581 * is a negative dentry) then we would attempt a standard SMB delete, but
1582 * if that fails we can not attempt the fall back mechanisms on EACCES
1583 * but will return the EACCES to the caller. Note that the VFS does not call
1584 * unlink on negative dentries currently.
1586 int cifs_unlink(struct inode *dir, struct dentry *dentry)
1590 const char *full_path;
1592 struct inode *inode = d_inode(dentry);
1593 struct cifsInodeInfo *cifs_inode;
1594 struct super_block *sb = dir->i_sb;
1595 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1596 struct tcon_link *tlink;
1597 struct cifs_tcon *tcon;
1598 struct TCP_Server_Info *server;
1599 struct iattr *attrs = NULL;
1600 __u32 dosattr = 0, origattr = 0;
1602 cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry);
1604 if (unlikely(cifs_forced_shutdown(cifs_sb)))
1607 tlink = cifs_sb_tlink(cifs_sb);
1609 return PTR_ERR(tlink);
1610 tcon = tlink_tcon(tlink);
1611 server = tcon->ses->server;
1614 page = alloc_dentry_path();
1616 if (tcon->nodelete) {
1621 /* Unlink can be called from rename so we can not take the
1622 * sb->s_vfs_rename_mutex here */
1623 full_path = build_path_from_dentry(dentry, page);
1624 if (IS_ERR(full_path)) {
1625 rc = PTR_ERR(full_path);
1629 cifs_close_deferred_file_under_dentry(tcon, full_path);
1630 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1631 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1632 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
1633 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
1634 cifs_remap(cifs_sb));
1635 cifs_dbg(FYI, "posix del rc %d\n", rc);
1636 if ((rc == 0) || (rc == -ENOENT))
1637 goto psx_del_no_retry;
1641 if (!server->ops->unlink) {
1643 goto psx_del_no_retry;
1646 rc = server->ops->unlink(xid, tcon, full_path, cifs_sb);
1651 cifs_drop_nlink(inode);
1652 } else if (rc == -ENOENT) {
1654 } else if (rc == -EBUSY) {
1655 if (server->ops->rename_pending_delete) {
1656 rc = server->ops->rename_pending_delete(full_path,
1659 cifs_drop_nlink(inode);
1661 } else if ((rc == -EACCES) && (dosattr == 0) && inode) {
1662 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
1663 if (attrs == NULL) {
1668 /* try to reset dos attributes */
1669 cifs_inode = CIFS_I(inode);
1670 origattr = cifs_inode->cifsAttrs;
1672 origattr |= ATTR_NORMAL;
1673 dosattr = origattr & ~ATTR_READONLY;
1675 dosattr |= ATTR_NORMAL;
1676 dosattr |= ATTR_HIDDEN;
1678 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1682 goto retry_std_delete;
1685 /* undo the setattr if we errored out and it's needed */
1686 if (rc != 0 && dosattr != 0)
1687 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
1691 cifs_inode = CIFS_I(inode);
1692 cifs_inode->time = 0; /* will force revalidate to get info
1694 inode->i_ctime = current_time(inode);
1696 dir->i_ctime = dir->i_mtime = current_time(dir);
1697 cifs_inode = CIFS_I(dir);
1698 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
1700 free_dentry_path(page);
1703 cifs_put_tlink(tlink);
1708 cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode,
1709 const char *full_path, struct cifs_sb_info *cifs_sb,
1710 struct cifs_tcon *tcon, const unsigned int xid)
1713 struct inode *inode = NULL;
1715 if (tcon->posix_extensions)
1716 rc = smb311_posix_get_inode_info(&inode, full_path, parent->i_sb, xid);
1717 else if (tcon->unix_ext)
1718 rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb,
1721 rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb,
1727 if (!S_ISDIR(inode->i_mode)) {
1729 * mkdir succeeded, but another client has managed to remove the
1730 * sucker and replace it with non-directory. Return success,
1731 * but don't leave the child in dcache.
1738 * setting nlink not necessary except in cases where we failed to get it
1739 * from the server or was set bogus. Also, since this is a brand new
1740 * inode, no need to grab the i_lock before setting the i_nlink.
1742 if (inode->i_nlink < 2)
1743 set_nlink(inode, 2);
1744 mode &= ~current_umask();
1745 /* must turn on setgid bit if parent dir has it */
1746 if (parent->i_mode & S_ISGID)
1749 if (tcon->unix_ext) {
1750 struct cifs_unix_set_info_args args = {
1752 .ctime = NO_CHANGE_64,
1753 .atime = NO_CHANGE_64,
1754 .mtime = NO_CHANGE_64,
1757 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1758 args.uid = current_fsuid();
1759 if (parent->i_mode & S_ISGID)
1760 args.gid = parent->i_gid;
1762 args.gid = current_fsgid();
1764 args.uid = INVALID_UID; /* no change */
1765 args.gid = INVALID_GID; /* no change */
1767 CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
1769 cifs_remap(cifs_sb));
1771 struct TCP_Server_Info *server = tcon->ses->server;
1772 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1773 (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo)
1774 server->ops->mkdir_setinfo(inode, full_path, cifs_sb,
1776 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
1777 inode->i_mode = (mode | S_IFDIR);
1779 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1780 inode->i_uid = current_fsuid();
1781 if (inode->i_mode & S_ISGID)
1782 inode->i_gid = parent->i_gid;
1784 inode->i_gid = current_fsgid();
1787 d_instantiate(dentry, inode);
1792 cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode,
1793 const char *full_path, struct cifs_sb_info *cifs_sb,
1794 struct cifs_tcon *tcon, const unsigned int xid)
1798 FILE_UNIX_BASIC_INFO *info = NULL;
1799 struct inode *newinode = NULL;
1800 struct cifs_fattr fattr;
1802 info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1805 goto posix_mkdir_out;
1808 mode &= ~current_umask();
1809 rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode,
1810 NULL /* netfid */, info, &oplock, full_path,
1811 cifs_sb->local_nls, cifs_remap(cifs_sb));
1812 if (rc == -EOPNOTSUPP)
1813 goto posix_mkdir_out;
1815 cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc);
1817 goto posix_mkdir_out;
1820 if (info->Type == cpu_to_le32(-1))
1821 /* no return info, go query for it */
1822 goto posix_mkdir_get_info;
1824 * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if
1825 * need to set uid/gid.
1828 cifs_unix_basic_to_fattr(&fattr, info, cifs_sb);
1829 cifs_fill_uniqueid(inode->i_sb, &fattr);
1830 newinode = cifs_iget(inode->i_sb, &fattr);
1832 goto posix_mkdir_get_info;
1834 d_instantiate(dentry, newinode);
1836 #ifdef CONFIG_CIFS_DEBUG2
1837 cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n",
1838 dentry, dentry, newinode);
1840 if (newinode->i_nlink != 2)
1841 cifs_dbg(FYI, "unexpected number of links %d\n",
1848 posix_mkdir_get_info:
1849 rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon,
1851 goto posix_mkdir_out;
1854 int cifs_mkdir(struct user_namespace *mnt_userns, struct inode *inode,
1855 struct dentry *direntry, umode_t mode)
1859 struct cifs_sb_info *cifs_sb;
1860 struct tcon_link *tlink;
1861 struct cifs_tcon *tcon;
1862 struct TCP_Server_Info *server;
1863 const char *full_path;
1866 cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n",
1869 cifs_sb = CIFS_SB(inode->i_sb);
1870 if (unlikely(cifs_forced_shutdown(cifs_sb)))
1872 tlink = cifs_sb_tlink(cifs_sb);
1874 return PTR_ERR(tlink);
1875 tcon = tlink_tcon(tlink);
1879 page = alloc_dentry_path();
1880 full_path = build_path_from_dentry(direntry, page);
1881 if (IS_ERR(full_path)) {
1882 rc = PTR_ERR(full_path);
1886 server = tcon->ses->server;
1888 if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) {
1889 rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path,
1891 d_drop(direntry); /* for time being always refresh inode info */
1895 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1896 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1897 rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb,
1899 if (rc != -EOPNOTSUPP)
1903 if (!server->ops->mkdir) {
1908 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1909 rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb);
1911 cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc);
1916 /* TODO: skip this for smb2/smb3 */
1917 rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon,
1921 * Force revalidate to get parent dir info when needed since cached
1922 * attributes are invalid now.
1924 CIFS_I(inode)->time = 0;
1925 free_dentry_path(page);
1927 cifs_put_tlink(tlink);
1931 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1935 struct cifs_sb_info *cifs_sb;
1936 struct tcon_link *tlink;
1937 struct cifs_tcon *tcon;
1938 struct TCP_Server_Info *server;
1939 const char *full_path;
1940 void *page = alloc_dentry_path();
1941 struct cifsInodeInfo *cifsInode;
1943 cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode);
1947 full_path = build_path_from_dentry(direntry, page);
1948 if (IS_ERR(full_path)) {
1949 rc = PTR_ERR(full_path);
1953 cifs_sb = CIFS_SB(inode->i_sb);
1954 if (unlikely(cifs_forced_shutdown(cifs_sb))) {
1959 tlink = cifs_sb_tlink(cifs_sb);
1960 if (IS_ERR(tlink)) {
1961 rc = PTR_ERR(tlink);
1964 tcon = tlink_tcon(tlink);
1965 server = tcon->ses->server;
1967 if (!server->ops->rmdir) {
1969 cifs_put_tlink(tlink);
1973 if (tcon->nodelete) {
1975 cifs_put_tlink(tlink);
1979 rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb);
1980 cifs_put_tlink(tlink);
1983 spin_lock(&d_inode(direntry)->i_lock);
1984 i_size_write(d_inode(direntry), 0);
1985 clear_nlink(d_inode(direntry));
1986 spin_unlock(&d_inode(direntry)->i_lock);
1989 cifsInode = CIFS_I(d_inode(direntry));
1990 /* force revalidate to go get info when needed */
1991 cifsInode->time = 0;
1993 cifsInode = CIFS_I(inode);
1995 * Force revalidate to get parent dir info when needed since cached
1996 * attributes are invalid now.
1998 cifsInode->time = 0;
2000 d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime =
2001 current_time(inode);
2004 free_dentry_path(page);
2010 cifs_do_rename(const unsigned int xid, struct dentry *from_dentry,
2011 const char *from_path, struct dentry *to_dentry,
2012 const char *to_path)
2014 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
2015 struct tcon_link *tlink;
2016 struct cifs_tcon *tcon;
2017 struct TCP_Server_Info *server;
2018 struct cifs_fid fid;
2019 struct cifs_open_parms oparms;
2022 tlink = cifs_sb_tlink(cifs_sb);
2024 return PTR_ERR(tlink);
2025 tcon = tlink_tcon(tlink);
2026 server = tcon->ses->server;
2028 if (!server->ops->rename)
2031 /* try path-based rename first */
2032 rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb);
2035 * Don't bother with rename by filehandle unless file is busy and
2036 * source. Note that cross directory moves do not work with
2037 * rename by filehandle to various Windows servers.
2039 if (rc == 0 || rc != -EBUSY)
2040 goto do_rename_exit;
2042 /* Don't fall back to using SMB on SMB 2+ mount */
2043 if (server->vals->protocol_id != 0)
2044 goto do_rename_exit;
2046 /* open-file renames don't work across directories */
2047 if (to_dentry->d_parent != from_dentry->d_parent)
2048 goto do_rename_exit;
2051 oparms.cifs_sb = cifs_sb;
2052 /* open the file to be renamed -- we need DELETE perms */
2053 oparms.desired_access = DELETE;
2054 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
2055 oparms.disposition = FILE_OPEN;
2056 oparms.path = from_path;
2058 oparms.reconnect = false;
2060 rc = CIFS_open(xid, &oparms, &oplock, NULL);
2062 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid,
2063 (const char *) to_dentry->d_name.name,
2064 cifs_sb->local_nls, cifs_remap(cifs_sb));
2065 CIFSSMBClose(xid, tcon, fid.netfid);
2069 d_move(from_dentry, to_dentry);
2070 cifs_put_tlink(tlink);
2075 cifs_rename2(struct user_namespace *mnt_userns, struct inode *source_dir,
2076 struct dentry *source_dentry, struct inode *target_dir,
2077 struct dentry *target_dentry, unsigned int flags)
2079 const char *from_name, *to_name;
2080 void *page1, *page2;
2081 struct cifs_sb_info *cifs_sb;
2082 struct tcon_link *tlink;
2083 struct cifs_tcon *tcon;
2084 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
2085 FILE_UNIX_BASIC_INFO *info_buf_target;
2088 int retry_count = 0;
2090 if (flags & ~RENAME_NOREPLACE)
2093 cifs_sb = CIFS_SB(source_dir->i_sb);
2094 if (unlikely(cifs_forced_shutdown(cifs_sb)))
2097 tlink = cifs_sb_tlink(cifs_sb);
2099 return PTR_ERR(tlink);
2100 tcon = tlink_tcon(tlink);
2102 page1 = alloc_dentry_path();
2103 page2 = alloc_dentry_path();
2106 from_name = build_path_from_dentry(source_dentry, page1);
2107 if (IS_ERR(from_name)) {
2108 rc = PTR_ERR(from_name);
2109 goto cifs_rename_exit;
2112 to_name = build_path_from_dentry(target_dentry, page2);
2113 if (IS_ERR(to_name)) {
2114 rc = PTR_ERR(to_name);
2115 goto cifs_rename_exit;
2118 cifs_close_deferred_file_under_dentry(tcon, from_name);
2119 if (d_inode(target_dentry) != NULL)
2120 cifs_close_deferred_file_under_dentry(tcon, to_name);
2122 rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
2125 if (rc == -EACCES) {
2126 while (retry_count < 3) {
2127 cifs_close_all_deferred_files(tcon);
2128 rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
2137 * No-replace is the natural behavior for CIFS, so skip unlink hacks.
2139 if (flags & RENAME_NOREPLACE)
2140 goto cifs_rename_exit;
2142 if (rc == -EEXIST && tcon->unix_ext) {
2144 * Are src and dst hardlinks of same inode? We can only tell
2145 * with unix extensions enabled.
2148 kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO),
2150 if (info_buf_source == NULL) {
2152 goto cifs_rename_exit;
2155 info_buf_target = info_buf_source + 1;
2156 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name,
2159 cifs_remap(cifs_sb));
2163 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name,
2166 cifs_remap(cifs_sb));
2168 if (tmprc == 0 && (info_buf_source->UniqueId ==
2169 info_buf_target->UniqueId)) {
2170 /* same file, POSIX says that this is a noop */
2172 goto cifs_rename_exit;
2176 * else ... BB we could add the same check for Windows by
2177 * checking the UniqueId via FILE_INTERNAL_INFO
2181 /* Try unlinking the target dentry if it's not negative */
2182 if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) {
2183 if (d_is_dir(target_dentry))
2184 tmprc = cifs_rmdir(target_dir, target_dentry);
2186 tmprc = cifs_unlink(target_dir, target_dentry);
2188 goto cifs_rename_exit;
2189 rc = cifs_do_rename(xid, source_dentry, from_name,
2190 target_dentry, to_name);
2193 /* force revalidate to go get info when needed */
2194 CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0;
2196 source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime =
2197 target_dir->i_mtime = current_time(source_dir);
2200 kfree(info_buf_source);
2201 free_dentry_path(page2);
2202 free_dentry_path(page1);
2204 cifs_put_tlink(tlink);
2209 cifs_dentry_needs_reval(struct dentry *dentry)
2211 struct inode *inode = d_inode(dentry);
2212 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2213 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2214 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2215 struct cached_fid *cfid = NULL;
2217 if (cifs_i->time == 0)
2220 if (CIFS_CACHE_READ(cifs_i))
2223 if (!lookupCacheEnabled)
2226 if (!open_cached_dir_by_dentry(tcon, dentry->d_parent, &cfid)) {
2227 mutex_lock(&cfid->fid_mutex);
2228 if (cfid->time && cifs_i->time > cfid->time) {
2229 mutex_unlock(&cfid->fid_mutex);
2230 close_cached_dir(cfid);
2233 mutex_unlock(&cfid->fid_mutex);
2234 close_cached_dir(cfid);
2237 * depending on inode type, check if attribute caching disabled for
2238 * files or directories
2240 if (S_ISDIR(inode->i_mode)) {
2241 if (!cifs_sb->ctx->acdirmax)
2243 if (!time_in_range(jiffies, cifs_i->time,
2244 cifs_i->time + cifs_sb->ctx->acdirmax))
2247 if (!cifs_sb->ctx->acregmax)
2249 if (!time_in_range(jiffies, cifs_i->time,
2250 cifs_i->time + cifs_sb->ctx->acregmax))
2254 /* hardlinked files w/ noserverino get "special" treatment */
2255 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
2256 S_ISREG(inode->i_mode) && inode->i_nlink != 1)
2263 * Zap the cache. Called when invalid_mapping flag is set.
2266 cifs_invalidate_mapping(struct inode *inode)
2270 if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
2271 rc = invalidate_inode_pages2(inode->i_mapping);
2273 cifs_dbg(VFS, "%s: Could not invalidate inode %p\n",
2281 * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks
2283 * @key: currently unused
2284 * @mode: the task state to sleep in
2287 cifs_wait_bit_killable(struct wait_bit_key *key, int mode)
2289 freezable_schedule_unsafe();
2290 if (signal_pending_state(mode, current))
2291 return -ERESTARTSYS;
2296 cifs_revalidate_mapping(struct inode *inode)
2299 unsigned long *flags = &CIFS_I(inode)->flags;
2300 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2302 /* swapfiles are not supposed to be shared */
2303 if (IS_SWAPFILE(inode))
2306 rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable,
2311 if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) {
2312 /* for cache=singleclient, do not invalidate */
2313 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE)
2314 goto skip_invalidate;
2316 rc = cifs_invalidate_mapping(inode);
2318 set_bit(CIFS_INO_INVALID_MAPPING, flags);
2322 clear_bit_unlock(CIFS_INO_LOCK, flags);
2323 smp_mb__after_atomic();
2324 wake_up_bit(flags, CIFS_INO_LOCK);
2330 cifs_zap_mapping(struct inode *inode)
2332 set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags);
2333 return cifs_revalidate_mapping(inode);
2336 int cifs_revalidate_file_attr(struct file *filp)
2339 struct dentry *dentry = file_dentry(filp);
2340 struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
2342 if (!cifs_dentry_needs_reval(dentry))
2345 if (tlink_tcon(cfile->tlink)->unix_ext)
2346 rc = cifs_get_file_info_unix(filp);
2348 rc = cifs_get_file_info(filp);
2353 int cifs_revalidate_dentry_attr(struct dentry *dentry)
2357 struct inode *inode = d_inode(dentry);
2358 struct super_block *sb = dentry->d_sb;
2359 const char *full_path;
2366 if (!cifs_dentry_needs_reval(dentry))
2371 page = alloc_dentry_path();
2372 full_path = build_path_from_dentry(dentry, page);
2373 if (IS_ERR(full_path)) {
2374 rc = PTR_ERR(full_path);
2378 cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n",
2379 full_path, inode, inode->i_count.counter,
2380 dentry, cifs_get_time(dentry), jiffies);
2383 if (cifs_sb_master_tcon(CIFS_SB(sb))->posix_extensions)
2384 rc = smb311_posix_get_inode_info(&inode, full_path, sb, xid);
2385 else if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
2386 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
2388 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
2390 if (rc == -EAGAIN && count++ < 10)
2393 free_dentry_path(page);
2399 int cifs_revalidate_file(struct file *filp)
2402 struct inode *inode = file_inode(filp);
2404 rc = cifs_revalidate_file_attr(filp);
2408 return cifs_revalidate_mapping(inode);
2411 /* revalidate a dentry's inode attributes */
2412 int cifs_revalidate_dentry(struct dentry *dentry)
2415 struct inode *inode = d_inode(dentry);
2417 rc = cifs_revalidate_dentry_attr(dentry);
2421 return cifs_revalidate_mapping(inode);
2424 int cifs_getattr(struct user_namespace *mnt_userns, const struct path *path,
2425 struct kstat *stat, u32 request_mask, unsigned int flags)
2427 struct dentry *dentry = path->dentry;
2428 struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
2429 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2430 struct inode *inode = d_inode(dentry);
2433 if (unlikely(cifs_forced_shutdown(CIFS_SB(inode->i_sb))))
2437 * We need to be sure that all dirty pages are written and the server
2438 * has actual ctime, mtime and file length.
2440 if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_SIZE | STATX_BLOCKS)) &&
2441 !CIFS_CACHE_READ(CIFS_I(inode)) &&
2442 inode->i_mapping && inode->i_mapping->nrpages != 0) {
2443 rc = filemap_fdatawait(inode->i_mapping);
2445 mapping_set_error(inode->i_mapping, rc);
2450 if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_FORCE_SYNC)
2451 CIFS_I(inode)->time = 0; /* force revalidate */
2454 * If the caller doesn't require syncing, only sync if
2455 * necessary (e.g. due to earlier truncate or setattr
2456 * invalidating the cached metadata)
2458 if (((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) ||
2459 (CIFS_I(inode)->time == 0)) {
2460 rc = cifs_revalidate_dentry_attr(dentry);
2465 generic_fillattr(&init_user_ns, inode, stat);
2466 stat->blksize = cifs_sb->ctx->bsize;
2467 stat->ino = CIFS_I(inode)->uniqueid;
2469 /* old CIFS Unix Extensions doesn't return create time */
2470 if (CIFS_I(inode)->createtime) {
2471 stat->result_mask |= STATX_BTIME;
2473 cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime));
2476 stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED);
2477 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED)
2478 stat->attributes |= STATX_ATTR_COMPRESSED;
2479 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED)
2480 stat->attributes |= STATX_ATTR_ENCRYPTED;
2483 * If on a multiuser mount without unix extensions or cifsacl being
2484 * enabled, and the admin hasn't overridden them, set the ownership
2485 * to the fsuid/fsgid of the current process.
2487 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) &&
2488 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
2490 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID))
2491 stat->uid = current_fsuid();
2492 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID))
2493 stat->gid = current_fsgid();
2498 int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start,
2501 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2502 struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->netfs.inode.i_sb);
2503 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2504 struct TCP_Server_Info *server = tcon->ses->server;
2505 struct cifsFileInfo *cfile;
2508 if (unlikely(cifs_forced_shutdown(cifs_sb)))
2512 * We need to be sure that all dirty pages are written as they
2513 * might fill holes on the server.
2515 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
2516 inode->i_mapping->nrpages != 0) {
2517 rc = filemap_fdatawait(inode->i_mapping);
2519 mapping_set_error(inode->i_mapping, rc);
2524 cfile = find_readable_file(cifs_i, false);
2528 if (server->ops->fiemap) {
2529 rc = server->ops->fiemap(tcon, cfile, fei, start, len);
2530 cifsFileInfo_put(cfile);
2534 cifsFileInfo_put(cfile);
2538 int cifs_truncate_page(struct address_space *mapping, loff_t from)
2540 pgoff_t index = from >> PAGE_SHIFT;
2541 unsigned offset = from & (PAGE_SIZE - 1);
2545 page = grab_cache_page(mapping, index);
2549 zero_user_segment(page, offset, PAGE_SIZE);
2555 void cifs_setsize(struct inode *inode, loff_t offset)
2557 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2559 spin_lock(&inode->i_lock);
2560 i_size_write(inode, offset);
2561 spin_unlock(&inode->i_lock);
2563 /* Cached inode must be refreshed on truncate */
2565 truncate_pagecache(inode, offset);
2569 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
2570 unsigned int xid, const char *full_path)
2573 struct cifsFileInfo *open_file;
2574 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2575 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2576 struct tcon_link *tlink = NULL;
2577 struct cifs_tcon *tcon = NULL;
2578 struct TCP_Server_Info *server;
2581 * To avoid spurious oplock breaks from server, in the case of
2582 * inodes that we already have open, avoid doing path based
2583 * setting of file size if we can do it by handle.
2584 * This keeps our caching token (oplock) and avoids timeouts
2585 * when the local oplock break takes longer to flush
2586 * writebehind data than the SMB timeout for the SetPathInfo
2587 * request would allow
2589 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2591 tcon = tlink_tcon(open_file->tlink);
2592 server = tcon->ses->server;
2593 if (server->ops->set_file_size)
2594 rc = server->ops->set_file_size(xid, tcon, open_file,
2595 attrs->ia_size, false);
2598 cifsFileInfo_put(open_file);
2599 cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc);
2607 tlink = cifs_sb_tlink(cifs_sb);
2609 return PTR_ERR(tlink);
2610 tcon = tlink_tcon(tlink);
2611 server = tcon->ses->server;
2615 * Set file size by pathname rather than by handle either because no
2616 * valid, writeable file handle for it was found or because there was
2617 * an error setting it by handle.
2619 if (server->ops->set_path_size)
2620 rc = server->ops->set_path_size(xid, tcon, full_path,
2621 attrs->ia_size, cifs_sb, false);
2624 cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc);
2627 cifs_put_tlink(tlink);
2631 cifsInode->server_eof = attrs->ia_size;
2632 cifs_setsize(inode, attrs->ia_size);
2634 * i_blocks is not related to (i_size / i_blksize), but instead
2635 * 512 byte (2**9) size is required for calculating num blocks.
2636 * Until we can query the server for actual allocation size,
2637 * this is best estimate we have for blocks allocated for a file
2638 * Number of blocks must be rounded up so size 1 is not 0 blocks
2640 inode->i_blocks = (512 - 1 + attrs->ia_size) >> 9;
2643 * The man page of truncate says if the size changed,
2644 * then the st_ctime and st_mtime fields for the file
2647 attrs->ia_ctime = attrs->ia_mtime = current_time(inode);
2648 attrs->ia_valid |= ATTR_CTIME | ATTR_MTIME;
2650 cifs_truncate_page(inode->i_mapping, inode->i_size);
2657 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
2661 const char *full_path;
2662 void *page = alloc_dentry_path();
2663 struct inode *inode = d_inode(direntry);
2664 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2665 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2666 struct tcon_link *tlink;
2667 struct cifs_tcon *pTcon;
2668 struct cifs_unix_set_info_args *args = NULL;
2669 struct cifsFileInfo *open_file;
2671 cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n",
2672 direntry, attrs->ia_valid);
2676 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2677 attrs->ia_valid |= ATTR_FORCE;
2679 rc = setattr_prepare(&init_user_ns, direntry, attrs);
2683 full_path = build_path_from_dentry(direntry, page);
2684 if (IS_ERR(full_path)) {
2685 rc = PTR_ERR(full_path);
2690 * Attempt to flush data before changing attributes. We need to do
2691 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2692 * ownership or mode then we may also need to do this. Here, we take
2693 * the safe way out and just do the flush on all setattr requests. If
2694 * the flush returns error, store it to report later and continue.
2696 * BB: This should be smarter. Why bother flushing pages that
2697 * will be truncated anyway? Also, should we error out here if
2698 * the flush returns error?
2700 rc = filemap_write_and_wait(inode->i_mapping);
2701 if (is_interrupt_error(rc)) {
2706 mapping_set_error(inode->i_mapping, rc);
2709 if (attrs->ia_valid & ATTR_SIZE) {
2710 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2715 /* skip mode change if it's just for clearing setuid/setgid */
2716 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2717 attrs->ia_valid &= ~ATTR_MODE;
2719 args = kmalloc(sizeof(*args), GFP_KERNEL);
2725 /* set up the struct */
2726 if (attrs->ia_valid & ATTR_MODE)
2727 args->mode = attrs->ia_mode;
2729 args->mode = NO_CHANGE_64;
2731 if (attrs->ia_valid & ATTR_UID)
2732 args->uid = attrs->ia_uid;
2734 args->uid = INVALID_UID; /* no change */
2736 if (attrs->ia_valid & ATTR_GID)
2737 args->gid = attrs->ia_gid;
2739 args->gid = INVALID_GID; /* no change */
2741 if (attrs->ia_valid & ATTR_ATIME)
2742 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
2744 args->atime = NO_CHANGE_64;
2746 if (attrs->ia_valid & ATTR_MTIME)
2747 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
2749 args->mtime = NO_CHANGE_64;
2751 if (attrs->ia_valid & ATTR_CTIME)
2752 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
2754 args->ctime = NO_CHANGE_64;
2757 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2759 u16 nfid = open_file->fid.netfid;
2760 u32 npid = open_file->pid;
2761 pTcon = tlink_tcon(open_file->tlink);
2762 rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
2763 cifsFileInfo_put(open_file);
2765 tlink = cifs_sb_tlink(cifs_sb);
2766 if (IS_ERR(tlink)) {
2767 rc = PTR_ERR(tlink);
2770 pTcon = tlink_tcon(tlink);
2771 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
2773 cifs_remap(cifs_sb));
2774 cifs_put_tlink(tlink);
2780 if ((attrs->ia_valid & ATTR_SIZE) &&
2781 attrs->ia_size != i_size_read(inode)) {
2782 truncate_setsize(inode, attrs->ia_size);
2783 fscache_resize_cookie(cifs_inode_cookie(inode), attrs->ia_size);
2786 setattr_copy(&init_user_ns, inode, attrs);
2787 mark_inode_dirty(inode);
2789 /* force revalidate when any of these times are set since some
2790 of the fs types (eg ext3, fat) do not have fine enough
2791 time granularity to match protocol, and we do not have a
2792 a way (yet) to query the server fs's time granularity (and
2793 whether it rounds times down).
2795 if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))
2796 cifsInode->time = 0;
2799 free_dentry_path(page);
2805 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
2808 kuid_t uid = INVALID_UID;
2809 kgid_t gid = INVALID_GID;
2810 struct inode *inode = d_inode(direntry);
2811 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2812 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2813 struct cifsFileInfo *wfile;
2814 struct cifs_tcon *tcon;
2815 const char *full_path;
2816 void *page = alloc_dentry_path();
2819 __u64 mode = NO_CHANGE_64;
2823 cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n",
2824 direntry, attrs->ia_valid);
2826 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2827 attrs->ia_valid |= ATTR_FORCE;
2829 rc = setattr_prepare(&init_user_ns, direntry, attrs);
2831 goto cifs_setattr_exit;
2833 full_path = build_path_from_dentry(direntry, page);
2834 if (IS_ERR(full_path)) {
2835 rc = PTR_ERR(full_path);
2836 goto cifs_setattr_exit;
2840 * Attempt to flush data before changing attributes. We need to do
2841 * this for ATTR_SIZE and ATTR_MTIME. If the flush of the data
2842 * returns error, store it to report later and continue.
2844 * BB: This should be smarter. Why bother flushing pages that
2845 * will be truncated anyway? Also, should we error out here if
2846 * the flush returns error? Do we need to check for ATTR_MTIME_SET flag?
2848 if (attrs->ia_valid & (ATTR_MTIME | ATTR_SIZE | ATTR_CTIME)) {
2849 rc = filemap_write_and_wait(inode->i_mapping);
2850 if (is_interrupt_error(rc)) {
2852 goto cifs_setattr_exit;
2854 mapping_set_error(inode->i_mapping, rc);
2859 if ((attrs->ia_valid & ATTR_MTIME) &&
2860 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) {
2861 rc = cifs_get_writable_file(cifsInode, FIND_WR_ANY, &wfile);
2863 tcon = tlink_tcon(wfile->tlink);
2864 rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid);
2865 cifsFileInfo_put(wfile);
2867 goto cifs_setattr_exit;
2868 } else if (rc != -EBADF)
2869 goto cifs_setattr_exit;
2874 if (attrs->ia_valid & ATTR_SIZE) {
2875 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2877 goto cifs_setattr_exit;
2880 if (attrs->ia_valid & ATTR_UID)
2881 uid = attrs->ia_uid;
2883 if (attrs->ia_valid & ATTR_GID)
2884 gid = attrs->ia_gid;
2886 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2887 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2888 if (uid_valid(uid) || gid_valid(gid)) {
2889 mode = NO_CHANGE_64;
2890 rc = id_mode_to_cifs_acl(inode, full_path, &mode,
2893 cifs_dbg(FYI, "%s: Setting id failed with error: %d\n",
2895 goto cifs_setattr_exit;
2899 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
2900 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
2902 /* skip mode change if it's just for clearing setuid/setgid */
2903 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2904 attrs->ia_valid &= ~ATTR_MODE;
2906 if (attrs->ia_valid & ATTR_MODE) {
2907 mode = attrs->ia_mode;
2909 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2910 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2911 rc = id_mode_to_cifs_acl(inode, full_path, &mode,
2912 INVALID_UID, INVALID_GID);
2914 cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n",
2916 goto cifs_setattr_exit;
2920 * In case of CIFS_MOUNT_CIFS_ACL, we cannot support all modes.
2921 * Pick up the actual mode bits that were set.
2923 if (mode != attrs->ia_mode)
2924 attrs->ia_mode = mode;
2926 if (((mode & S_IWUGO) == 0) &&
2927 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
2929 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
2931 /* fix up mode if we're not using dynperm */
2932 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
2933 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
2934 } else if ((mode & S_IWUGO) &&
2935 (cifsInode->cifsAttrs & ATTR_READONLY)) {
2937 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
2938 /* Attributes of 0 are ignored */
2940 dosattr |= ATTR_NORMAL;
2942 /* reset local inode permissions to normal */
2943 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2944 attrs->ia_mode &= ~(S_IALLUGO);
2945 if (S_ISDIR(inode->i_mode))
2947 cifs_sb->ctx->dir_mode;
2950 cifs_sb->ctx->file_mode;
2952 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2953 /* ignore mode change - ATTR_READONLY hasn't changed */
2954 attrs->ia_valid &= ~ATTR_MODE;
2958 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
2959 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
2960 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
2961 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
2963 /* Even if error on time set, no sense failing the call if
2964 the server would set the time to a reasonable value anyway,
2965 and this check ensures that we are not being called from
2966 sys_utimes in which case we ought to fail the call back to
2967 the user when the server rejects the call */
2968 if ((rc) && (attrs->ia_valid &
2969 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
2973 /* do not need local check to inode_check_ok since the server does
2976 goto cifs_setattr_exit;
2978 if ((attrs->ia_valid & ATTR_SIZE) &&
2979 attrs->ia_size != i_size_read(inode)) {
2980 truncate_setsize(inode, attrs->ia_size);
2981 fscache_resize_cookie(cifs_inode_cookie(inode), attrs->ia_size);
2984 setattr_copy(&init_user_ns, inode, attrs);
2985 mark_inode_dirty(inode);
2989 free_dentry_path(page);
2994 cifs_setattr(struct user_namespace *mnt_userns, struct dentry *direntry,
2995 struct iattr *attrs)
2997 struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
2998 struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb);
2999 int rc, retries = 0;
3001 if (unlikely(cifs_forced_shutdown(cifs_sb)))
3005 if (pTcon->unix_ext)
3006 rc = cifs_setattr_unix(direntry, attrs);
3008 rc = cifs_setattr_nounix(direntry, attrs);
3010 } while (is_retryable_error(rc) && retries < 2);
3012 /* BB: add cifs_setattr_legacy for really old servers */