2021-06-18 08:31:49 +03:00
|
|
|
// SPDX-License-Identifier: LGPL-2.1
|
2005-04-17 02:20:36 +04:00
|
|
|
/*
|
|
|
|
*
|
|
|
|
* vfs operations that deal with dentries
|
2007-06-05 22:30:44 +04:00
|
|
|
*
|
2009-02-20 07:32:45 +03:00
|
|
|
* Copyright (C) International Business Machines Corp., 2002,2009
|
2005-04-17 02:20:36 +04:00
|
|
|
* Author(s): Steve French (sfrench@us.ibm.com)
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
#include <linux/fs.h>
|
|
|
|
#include <linux/stat.h>
|
|
|
|
#include <linux/slab.h>
|
|
|
|
#include <linux/namei.h>
|
2009-09-21 14:47:50 +04:00
|
|
|
#include <linux/mount.h>
|
2010-06-16 21:40:16 +04:00
|
|
|
#include <linux/file.h>
|
2005-04-17 02:20:36 +04:00
|
|
|
#include "cifsfs.h"
|
|
|
|
#include "cifspdu.h"
|
|
|
|
#include "cifsglob.h"
|
|
|
|
#include "cifsproto.h"
|
|
|
|
#include "cifs_debug.h"
|
|
|
|
#include "cifs_fs_sb.h"
|
2013-09-05 16:38:11 +04:00
|
|
|
#include "cifs_unicode.h"
|
2020-12-10 08:07:12 +03:00
|
|
|
#include "fs_context.h"
|
2021-04-29 08:18:43 +03:00
|
|
|
#include "cifs_ioctl.h"
|
cifs: Support fscache indexing rewrite
Change the cifs filesystem to take account of the changes to fscache's
indexing rewrite and reenable caching in cifs.
The following changes have been made:
(1) The fscache_netfs struct is no more, and there's no need to register
the filesystem as a whole.
(2) The session cookie is now an fscache_volume cookie, allocated with
fscache_acquire_volume(). That takes three parameters: a string
representing the "volume" in the index, a string naming the cache to
use (or NULL) and a u64 that conveys coherency metadata for the
volume.
For cifs, I've made it render the volume name string as:
"cifs,<ipaddress>,<sharename>"
where the sharename has '/' characters replaced with ';'.
This probably needs rethinking a bit as the total name could exceed
the maximum filename component length.
Further, the coherency data is currently just set to 0. It needs
something else doing with it - I wonder if it would suffice simply to
sum the resource_id, vol_create_time and vol_serial_number or maybe
hash them.
(3) The fscache_cookie_def is no more and needed information is passed
directly to fscache_acquire_cookie(). The cache no longer calls back
into the filesystem, but rather metadata changes are indicated at
other times.
fscache_acquire_cookie() is passed the same keying and coherency
information as before.
(4) The functions to set/reset cookies are removed and
fscache_use_cookie() and fscache_unuse_cookie() are used instead.
fscache_use_cookie() is passed a flag to indicate if the cookie is
opened for writing. fscache_unuse_cookie() is passed updates for the
metadata if we changed it (ie. if the file was opened for writing).
These are called when the file is opened or closed.
(5) cifs_setattr_*() are made to call fscache_resize() to change the size
of the cache object.
(6) The functions to read and write data are stubbed out pending a
conversion to use netfslib.
Changes
=======
ver #8:
- Abstract cache invalidation into a helper function.
- Fix some checkpatch warnings[3].
ver #7:
- Removed the accidentally added-back call to get the super cookie in
cifs_root_iget().
- Fixed the right call to cifs_fscache_get_super_cookie() to take account
of the "-o fsc" mount flag.
ver #6:
- Moved the change of gfpflags_allow_blocking() to current_is_kswapd() for
cifs here.
- Fixed one of the error paths in cifs_atomic_open() to jump around the
call to use the cookie.
- Fixed an additional successful return in the middle of cifs_open() to
use the cookie on the way out.
- Only get a volume cookie (and thus inode cookies) when "-o fsc" is
supplied to mount.
ver #5:
- Fixed a couple of bits of cookie handling[2]:
- The cookie should be released in cifs_evict_inode(), not
cifsFileInfo_put_final(). The cookie needs to persist beyond file
closure so that writepages will be able to write to it.
- fscache_use_cookie() needs to be called in cifs_atomic_open() as it is
for cifs_open().
ver #4:
- Fixed the use of sizeof with memset.
- tcon->vol_create_time is __le64 so doesn't need cpu_to_le64().
ver #3:
- Canonicalise the cifs coherency data to make the cache portable.
- Set volume coherency data.
ver #2:
- Use gfpflags_allow_blocking() rather than using flag directly.
- Upgraded to -rc4 to allow for upstream changes[1].
- fscache_acquire_volume() now returns errors.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Jeff Layton <jlayton@kernel.org>
cc: Steve French <smfrench@gmail.com>
cc: Shyam Prasad N <nspmangalore@gmail.com>
cc: linux-cifs@vger.kernel.org
cc: linux-cachefs@redhat.com
Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=23b55d673d7527b093cd97b7c217c82e70cd1af0 [1]
Link: https://lore.kernel.org/r/3419813.1641592362@warthog.procyon.org.uk/ [2]
Link: https://lore.kernel.org/r/CAH2r5muTanw9pJqzAHd01d9A8keeChkzGsCEH6=0rHutVLAF-A@mail.gmail.com/ [3]
Link: https://lore.kernel.org/r/163819671009.215744.11230627184193298714.stgit@warthog.procyon.org.uk/ # v1
Link: https://lore.kernel.org/r/163906982979.143852.10672081929614953210.stgit@warthog.procyon.org.uk/ # v2
Link: https://lore.kernel.org/r/163967187187.1823006.247415138444991444.stgit@warthog.procyon.org.uk/ # v3
Link: https://lore.kernel.org/r/164021579335.640689.2681324337038770579.stgit@warthog.procyon.org.uk/ # v4
Link: https://lore.kernel.org/r/3462849.1641593783@warthog.procyon.org.uk/ # v5
Link: https://lore.kernel.org/r/1318953.1642024578@warthog.procyon.org.uk/ # v6
Signed-off-by: Steve French <stfrench@microsoft.com>
2020-11-17 18:56:59 +03:00
|
|
|
#include "fscache.h"
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2007-02-27 08:35:17 +03:00
|
|
|
static void
|
2005-04-17 02:20:36 +04:00
|
|
|
renew_parental_timestamps(struct dentry *direntry)
|
|
|
|
{
|
2007-06-05 22:30:44 +04:00
|
|
|
/* BB check if there is a way to get the kernel to do this or if we
|
|
|
|
really need this */
|
2005-04-17 02:20:36 +04:00
|
|
|
do {
|
2016-09-16 13:44:21 +03:00
|
|
|
cifs_set_time(direntry, jiffies);
|
2005-04-17 02:20:36 +04:00
|
|
|
direntry = direntry->d_parent;
|
2007-06-05 22:30:44 +04:00
|
|
|
} while (!IS_ROOT(direntry));
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|
|
|
|
|
2012-11-29 08:34:41 +04:00
|
|
|
char *
|
2020-12-10 08:07:12 +03:00
|
|
|
cifs_build_path_to_root(struct smb3_fs_context *ctx, struct cifs_sb_info *cifs_sb,
|
2016-12-15 10:01:19 +03:00
|
|
|
struct cifs_tcon *tcon, int add_treename)
|
2012-11-29 08:34:41 +04:00
|
|
|
{
|
2020-12-10 08:07:12 +03:00
|
|
|
int pplen = ctx->prepath ? strlen(ctx->prepath) + 1 : 0;
|
2012-11-29 08:34:41 +04:00
|
|
|
int dfsplen;
|
|
|
|
char *full_path = NULL;
|
|
|
|
|
|
|
|
/* if no prefix path, simply set path to the root of share to "" */
|
|
|
|
if (pplen == 0) {
|
|
|
|
full_path = kzalloc(1, GFP_KERNEL);
|
|
|
|
return full_path;
|
|
|
|
}
|
|
|
|
|
2016-12-15 10:01:19 +03:00
|
|
|
if (add_treename)
|
2022-09-21 22:05:53 +03:00
|
|
|
dfsplen = strnlen(tcon->tree_name, MAX_TREE_SIZE + 1);
|
2012-11-29 08:34:41 +04:00
|
|
|
else
|
|
|
|
dfsplen = 0;
|
|
|
|
|
|
|
|
full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL);
|
|
|
|
if (full_path == NULL)
|
|
|
|
return full_path;
|
|
|
|
|
|
|
|
if (dfsplen)
|
2022-09-21 22:05:53 +03:00
|
|
|
memcpy(full_path, tcon->tree_name, dfsplen);
|
2012-12-10 15:10:45 +04:00
|
|
|
full_path[dfsplen] = CIFS_DIR_SEP(cifs_sb);
|
2020-12-10 08:07:12 +03:00
|
|
|
memcpy(full_path + dfsplen + 1, ctx->prepath, pplen);
|
2012-11-29 08:34:41 +04:00
|
|
|
convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
|
|
|
|
return full_path;
|
|
|
|
}
|
|
|
|
|
2005-04-17 02:20:36 +04:00
|
|
|
/* Note: caller must free return buffer */
|
2021-03-18 22:47:35 +03:00
|
|
|
const char *
|
2021-03-06 01:36:04 +03:00
|
|
|
build_path_from_dentry(struct dentry *direntry, void *page)
|
2017-02-13 18:14:17 +03:00
|
|
|
{
|
|
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
|
|
|
|
struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
|
|
|
|
bool prefix = tcon->Flags & SMB_SHARE_IS_IN_DFS;
|
|
|
|
|
2021-03-06 01:36:04 +03:00
|
|
|
return build_path_from_dentry_optional_prefix(direntry, page,
|
2017-02-13 18:14:17 +03:00
|
|
|
prefix);
|
|
|
|
}
|
|
|
|
|
2022-12-18 20:37:32 +03:00
|
|
|
char *__build_path_from_dentry_optional_prefix(struct dentry *direntry, void *page,
|
|
|
|
const char *tree, int tree_len,
|
|
|
|
bool prefix)
|
2005-04-17 02:20:36 +04:00
|
|
|
{
|
2008-05-15 05:50:56 +04:00
|
|
|
int dfsplen;
|
2016-05-25 20:59:09 +03:00
|
|
|
int pplen = 0;
|
2010-09-21 03:01:35 +04:00
|
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
|
2021-03-06 05:53:48 +03:00
|
|
|
char dirsep = CIFS_DIR_SEP(cifs_sb);
|
|
|
|
char *s;
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2021-03-06 01:36:04 +03:00
|
|
|
if (unlikely(!page))
|
|
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
|
2017-02-13 18:14:17 +03:00
|
|
|
if (prefix)
|
2022-12-18 20:37:32 +03:00
|
|
|
dfsplen = strnlen(tree, tree_len + 1);
|
2008-05-15 05:50:56 +04:00
|
|
|
else
|
|
|
|
dfsplen = 0;
|
2016-05-25 20:59:09 +03:00
|
|
|
|
|
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
|
|
|
|
pplen = cifs_sb->prepath ? strlen(cifs_sb->prepath) + 1 : 0;
|
|
|
|
|
2021-08-10 09:33:55 +03:00
|
|
|
s = dentry_path_raw(direntry, page, PATH_MAX);
|
2021-03-06 05:53:48 +03:00
|
|
|
if (IS_ERR(s))
|
|
|
|
return s;
|
|
|
|
if (!s[1]) // for root we want "", not "/"
|
|
|
|
s++;
|
|
|
|
if (s < (char *)page + pplen + dfsplen)
|
2021-03-06 01:36:04 +03:00
|
|
|
return ERR_PTR(-ENAMETOOLONG);
|
2016-05-25 20:59:09 +03:00
|
|
|
if (pplen) {
|
|
|
|
cifs_dbg(FYI, "using cifs_sb prepath <%s>\n", cifs_sb->prepath);
|
2021-03-06 05:53:48 +03:00
|
|
|
s -= pplen;
|
|
|
|
memcpy(s + 1, cifs_sb->prepath, pplen - 1);
|
|
|
|
*s = '/';
|
2016-05-25 20:59:09 +03:00
|
|
|
}
|
2021-03-06 05:53:48 +03:00
|
|
|
if (dirsep != '/') {
|
|
|
|
/* BB test paths to Windows with '/' in the midst of prepath */
|
|
|
|
char *p;
|
2016-05-25 20:59:09 +03:00
|
|
|
|
2021-03-06 05:53:48 +03:00
|
|
|
for (p = s; *p; p++)
|
|
|
|
if (*p == '/')
|
|
|
|
*p = dirsep;
|
|
|
|
}
|
2008-05-15 05:50:56 +04:00
|
|
|
if (dfsplen) {
|
2021-03-06 05:53:48 +03:00
|
|
|
s -= dfsplen;
|
2022-12-18 20:37:32 +03:00
|
|
|
memcpy(s, tree, dfsplen);
|
2008-05-15 05:50:56 +04:00
|
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
|
|
|
|
int i;
|
|
|
|
for (i = 0; i < dfsplen; i++) {
|
2021-03-06 05:53:48 +03:00
|
|
|
if (s[i] == '\\')
|
|
|
|
s[i] = '/';
|
2008-05-15 05:50:56 +04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2021-03-06 05:53:48 +03:00
|
|
|
return s;
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|
|
|
|
|
2022-12-18 20:37:32 +03:00
|
|
|
char *build_path_from_dentry_optional_prefix(struct dentry *direntry, void *page,
|
|
|
|
bool prefix)
|
|
|
|
{
|
|
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
|
|
|
|
struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
|
|
|
|
|
|
|
|
return __build_path_from_dentry_optional_prefix(direntry, page, tcon->tree_name,
|
|
|
|
MAX_TREE_SIZE, prefix);
|
|
|
|
}
|
|
|
|
|
2012-06-05 17:10:23 +04:00
|
|
|
/*
|
2017-08-23 07:48:14 +03:00
|
|
|
* Don't allow path components longer than the server max.
|
2012-06-05 17:10:23 +04:00
|
|
|
* Don't allow the separator character in a path component.
|
|
|
|
* The VFS will not allow "/", but "\" is allowed by posix.
|
|
|
|
*/
|
|
|
|
static int
|
2017-08-23 07:48:14 +03:00
|
|
|
check_name(struct dentry *direntry, struct cifs_tcon *tcon)
|
2012-06-05 17:10:23 +04:00
|
|
|
{
|
|
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
|
|
|
|
int i;
|
|
|
|
|
2017-10-30 05:28:03 +03:00
|
|
|
if (unlikely(tcon->fsAttrInfo.MaxPathNameComponentLength &&
|
|
|
|
direntry->d_name.len >
|
2017-08-28 00:56:08 +03:00
|
|
|
le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength)))
|
2017-08-23 07:48:14 +03:00
|
|
|
return -ENAMETOOLONG;
|
|
|
|
|
2012-06-05 17:10:23 +04:00
|
|
|
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) {
|
|
|
|
for (i = 0; i < direntry->d_name.len; i++) {
|
|
|
|
if (direntry->d_name.name[i] == '\\') {
|
2013-05-05 07:12:25 +04:00
|
|
|
cifs_dbg(FYI, "Invalid file name\n");
|
2012-06-05 17:10:23 +04:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2006-06-01 02:40:51 +04:00
|
|
|
/* Inode operations in similar order to how they appear in Linux file fs.h */
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2022-10-04 00:43:50 +03:00
|
|
|
static int cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid,
|
|
|
|
struct tcon_link *tlink, unsigned int oflags, umode_t mode, __u32 *oplock,
|
|
|
|
struct cifs_fid *fid, struct cifs_open_info_data *buf)
|
2005-04-17 02:20:36 +04:00
|
|
|
{
|
|
|
|
int rc = -ENOENT;
|
2008-05-10 02:28:02 +04:00
|
|
|
int create_options = CREATE_NOT_DIR;
|
2012-09-19 03:20:27 +04:00
|
|
|
int desired_access;
|
2012-06-05 17:10:23 +04:00
|
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
|
|
|
|
struct cifs_tcon *tcon = tlink_tcon(tlink);
|
2021-03-06 01:36:04 +03:00
|
|
|
const char *full_path;
|
|
|
|
void *page = alloc_dentry_path();
|
2005-04-17 02:20:36 +04:00
|
|
|
struct inode *newinode = NULL;
|
2012-06-05 17:10:23 +04:00
|
|
|
int disposition;
|
2012-09-19 03:20:27 +04:00
|
|
|
struct TCP_Server_Info *server = tcon->ses->server;
|
2013-07-05 12:00:30 +04:00
|
|
|
struct cifs_open_parms oparms;
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2012-06-05 17:10:23 +04:00
|
|
|
*oplock = 0;
|
2012-03-20 13:55:09 +04:00
|
|
|
if (tcon->ses->server->oplocks)
|
2012-06-05 17:10:23 +04:00
|
|
|
*oplock = REQ_OPLOCK;
|
2009-02-20 07:32:45 +03:00
|
|
|
|
2021-03-06 01:36:04 +03:00
|
|
|
full_path = build_path_from_dentry(direntry, page);
|
|
|
|
if (IS_ERR(full_path)) {
|
|
|
|
free_dentry_path(page);
|
|
|
|
return PTR_ERR(full_path);
|
|
|
|
}
|
2010-09-30 03:51:11 +04:00
|
|
|
|
2022-08-01 19:17:46 +03:00
|
|
|
#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
|
2012-07-13 13:58:14 +04:00
|
|
|
if (tcon->unix_ext && cap_unix(tcon->ses) && !tcon->broken_posix_open &&
|
2009-02-20 07:32:45 +03:00
|
|
|
(CIFS_UNIX_POSIX_PATH_OPS_CAP &
|
|
|
|
le64_to_cpu(tcon->fsUnixInfo.Capability))) {
|
2012-09-19 03:20:27 +04:00
|
|
|
rc = cifs_posix_open(full_path, &newinode, inode->i_sb, mode,
|
|
|
|
oflags, oplock, &fid->netfid, xid);
|
2012-06-05 17:10:23 +04:00
|
|
|
switch (rc) {
|
|
|
|
case 0:
|
|
|
|
if (newinode == NULL) {
|
|
|
|
/* query inode info */
|
2009-05-08 07:04:30 +04:00
|
|
|
goto cifs_create_get_file_info;
|
2012-06-05 17:10:23 +04:00
|
|
|
}
|
|
|
|
|
2016-07-07 23:28:27 +03:00
|
|
|
if (S_ISDIR(newinode->i_mode)) {
|
|
|
|
CIFSSMBClose(xid, tcon, fid->netfid);
|
|
|
|
iput(newinode);
|
|
|
|
rc = -EISDIR;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2012-06-05 17:10:23 +04:00
|
|
|
if (!S_ISREG(newinode->i_mode)) {
|
|
|
|
/*
|
|
|
|
* The server may allow us to open things like
|
|
|
|
* FIFOs, but the client isn't set up to deal
|
|
|
|
* with that. If it's not a regular file, just
|
|
|
|
* close it and proceed as if it were a normal
|
|
|
|
* lookup.
|
|
|
|
*/
|
2012-09-19 03:20:27 +04:00
|
|
|
CIFSSMBClose(xid, tcon, fid->netfid);
|
2012-06-05 17:10:23 +04:00
|
|
|
goto cifs_create_get_file_info;
|
|
|
|
}
|
|
|
|
/* success, no need to query */
|
|
|
|
goto cifs_create_set_dentry;
|
|
|
|
|
|
|
|
case -ENOENT:
|
|
|
|
goto cifs_create_get_file_info;
|
|
|
|
|
|
|
|
case -EIO:
|
|
|
|
case -EINVAL:
|
|
|
|
/*
|
|
|
|
* EIO could indicate that (posix open) operation is not
|
|
|
|
* supported, despite what server claimed in capability
|
|
|
|
* negotiation.
|
|
|
|
*
|
|
|
|
* POSIX open in samba versions 3.3.1 and earlier could
|
|
|
|
* incorrectly fail with invalid parameter.
|
|
|
|
*/
|
|
|
|
tcon->broken_posix_open = true;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case -EREMOTE:
|
|
|
|
case -EOPNOTSUPP:
|
|
|
|
/*
|
|
|
|
* EREMOTE indicates DFS junction, which is not handled
|
|
|
|
* in posix open. If either that or op not supported
|
|
|
|
* returned, follow the normal lookup.
|
|
|
|
*/
|
|
|
|
break;
|
2005-09-07 02:18:26 +04:00
|
|
|
|
2012-06-05 17:10:23 +04:00
|
|
|
default:
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* fallthrough to retry, using older open call, this is case
|
|
|
|
* where server does not support this SMB level, and falsely
|
|
|
|
* claims capability (also get here for DFS case which should be
|
|
|
|
* rare for path not covered on files)
|
|
|
|
*/
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|
2022-08-01 19:17:46 +03:00
|
|
|
#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2012-09-19 03:20:27 +04:00
|
|
|
desired_access = 0;
|
2012-06-05 17:10:23 +04:00
|
|
|
if (OPEN_FMODE(oflags) & FMODE_READ)
|
2012-09-19 03:20:27 +04:00
|
|
|
desired_access |= GENERIC_READ; /* is this too little? */
|
2012-06-05 17:10:23 +04:00
|
|
|
if (OPEN_FMODE(oflags) & FMODE_WRITE)
|
2012-09-19 03:20:27 +04:00
|
|
|
desired_access |= GENERIC_WRITE;
|
2012-06-05 17:10:23 +04:00
|
|
|
|
|
|
|
disposition = FILE_OVERWRITE_IF;
|
|
|
|
if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
|
|
|
|
disposition = FILE_CREATE;
|
|
|
|
else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC))
|
|
|
|
disposition = FILE_OVERWRITE_IF;
|
|
|
|
else if ((oflags & O_CREAT) == O_CREAT)
|
|
|
|
disposition = FILE_OPEN_IF;
|
|
|
|
else
|
2013-05-05 07:12:25 +04:00
|
|
|
cifs_dbg(FYI, "Create flag not set in create function\n");
|
2012-06-05 17:10:23 +04:00
|
|
|
|
2012-09-19 03:20:27 +04:00
|
|
|
/*
|
|
|
|
* BB add processing to set equivalent of mode - e.g. via CreateX with
|
|
|
|
* ACLs
|
|
|
|
*/
|
|
|
|
|
|
|
|
if (!server->ops->open) {
|
|
|
|
rc = -ENOSYS;
|
|
|
|
goto out;
|
|
|
|
}
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2008-05-10 02:28:02 +04:00
|
|
|
/*
|
|
|
|
* if we're not using unix extensions, see if we need to set
|
|
|
|
* ATTR_READONLY on the create call
|
|
|
|
*/
|
2009-01-19 05:38:35 +03:00
|
|
|
if (!tcon->unix_ext && (mode & S_IWUGO) == 0)
|
2008-05-10 02:28:02 +04:00
|
|
|
create_options |= CREATE_OPTION_READONLY;
|
|
|
|
|
2023-01-11 14:37:58 +03:00
|
|
|
oparms = (struct cifs_open_parms) {
|
|
|
|
.tcon = tcon,
|
|
|
|
.cifs_sb = cifs_sb,
|
|
|
|
.desired_access = desired_access,
|
|
|
|
.create_options = cifs_create_options(cifs_sb, create_options),
|
|
|
|
.disposition = disposition,
|
|
|
|
.path = full_path,
|
|
|
|
.fid = fid,
|
|
|
|
.mode = mode,
|
|
|
|
};
|
2013-07-05 12:00:30 +04:00
|
|
|
rc = server->ops->open(xid, &oparms, oplock, buf);
|
2005-04-17 02:20:36 +04:00
|
|
|
if (rc) {
|
2013-05-05 07:12:25 +04:00
|
|
|
cifs_dbg(FYI, "cifs_create returned 0x%x\n", rc);
|
2012-06-05 17:10:23 +04:00
|
|
|
goto out;
|
2009-02-20 07:32:45 +03:00
|
|
|
}
|
|
|
|
|
2022-08-01 19:17:46 +03:00
|
|
|
#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
|
2012-09-19 03:20:27 +04:00
|
|
|
/*
|
|
|
|
* If Open reported that we actually created a file then we now have to
|
|
|
|
* set the mode if possible.
|
|
|
|
*/
|
2012-06-05 17:10:23 +04:00
|
|
|
if ((tcon->unix_ext) && (*oplock & CIFS_CREATE_ACTION)) {
|
2009-02-20 07:32:45 +03:00
|
|
|
struct cifs_unix_set_info_args args = {
|
2008-08-02 15:26:12 +04:00
|
|
|
.mode = mode,
|
|
|
|
.ctime = NO_CHANGE_64,
|
|
|
|
.atime = NO_CHANGE_64,
|
|
|
|
.mtime = NO_CHANGE_64,
|
|
|
|
.device = 0,
|
2009-02-20 07:32:45 +03:00
|
|
|
};
|
|
|
|
|
|
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
|
2013-02-06 12:57:56 +04:00
|
|
|
args.uid = current_fsuid();
|
2009-02-20 07:32:45 +03:00
|
|
|
if (inode->i_mode & S_ISGID)
|
2013-02-06 12:57:56 +04:00
|
|
|
args.gid = inode->i_gid;
|
2009-02-20 07:32:45 +03:00
|
|
|
else
|
2013-02-06 12:57:56 +04:00
|
|
|
args.gid = current_fsgid();
|
2007-06-08 18:55:14 +04:00
|
|
|
} else {
|
2013-02-06 12:57:56 +04:00
|
|
|
args.uid = INVALID_UID; /* no change */
|
|
|
|
args.gid = INVALID_GID; /* no change */
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|
2012-09-19 03:20:27 +04:00
|
|
|
CIFSSMBUnixSetFileInfo(xid, tcon, &args, fid->netfid,
|
|
|
|
current->tgid);
|
2009-02-20 07:32:45 +03:00
|
|
|
} else {
|
2012-09-19 03:20:27 +04:00
|
|
|
/*
|
|
|
|
* BB implement mode setting via Windows security
|
|
|
|
* descriptors e.g.
|
|
|
|
*/
|
2009-02-20 07:32:45 +03:00
|
|
|
/* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/
|
|
|
|
|
|
|
|
/* Could set r/o dos attribute if mode & 0222 == 0 */
|
|
|
|
}
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2009-02-20 07:32:45 +03:00
|
|
|
cifs_create_get_file_info:
|
|
|
|
/* server might mask mode so we have to query for it */
|
|
|
|
if (tcon->unix_ext)
|
2012-09-19 03:20:27 +04:00
|
|
|
rc = cifs_get_inode_info_unix(&newinode, full_path, inode->i_sb,
|
|
|
|
xid);
|
2009-02-20 07:32:45 +03:00
|
|
|
else {
|
2022-08-01 19:17:46 +03:00
|
|
|
#else
|
|
|
|
{
|
|
|
|
#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
|
2020-06-12 06:43:01 +03:00
|
|
|
/* TODO: Add support for calling POSIX query info here, but passing in fid */
|
2022-10-04 00:43:50 +03:00
|
|
|
rc = cifs_get_inode_info(&newinode, full_path, buf, inode->i_sb, xid, fid);
|
2009-02-20 07:32:45 +03:00
|
|
|
if (newinode) {
|
2012-09-19 17:22:44 +04:00
|
|
|
if (server->ops->set_lease_key)
|
|
|
|
server->ops->set_lease_key(newinode, fid);
|
2021-02-11 23:04:35 +03:00
|
|
|
if ((*oplock & CIFS_CREATE_ACTION) && S_ISREG(newinode->i_mode)) {
|
|
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
|
|
|
|
newinode->i_mode = mode;
|
|
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
|
|
|
|
newinode->i_uid = current_fsuid();
|
|
|
|
if (inode->i_mode & S_ISGID)
|
|
|
|
newinode->i_gid = inode->i_gid;
|
|
|
|
else
|
|
|
|
newinode->i_gid = current_fsgid();
|
|
|
|
}
|
2005-11-30 07:20:10 +03:00
|
|
|
}
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|
2009-02-20 07:32:45 +03:00
|
|
|
}
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2022-08-01 19:17:46 +03:00
|
|
|
#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
|
2009-02-20 07:32:45 +03:00
|
|
|
cifs_create_set_dentry:
|
2022-08-01 19:17:46 +03:00
|
|
|
#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
|
2012-06-05 17:10:23 +04:00
|
|
|
if (rc != 0) {
|
2013-05-05 07:12:25 +04:00
|
|
|
cifs_dbg(FYI, "Create worked, get_inode_info failed rc = %d\n",
|
|
|
|
rc);
|
2016-07-07 23:28:27 +03:00
|
|
|
goto out_err;
|
2012-06-05 17:10:23 +04:00
|
|
|
}
|
2016-07-07 23:28:27 +03:00
|
|
|
|
2021-06-23 03:53:08 +03:00
|
|
|
if (newinode)
|
|
|
|
if (S_ISDIR(newinode->i_mode)) {
|
|
|
|
rc = -EISDIR;
|
|
|
|
goto out_err;
|
|
|
|
}
|
2016-07-07 23:28:27 +03:00
|
|
|
|
2012-06-05 17:10:23 +04:00
|
|
|
d_drop(direntry);
|
|
|
|
d_add(direntry, newinode);
|
2009-02-20 07:32:45 +03:00
|
|
|
|
2012-06-05 17:10:23 +04:00
|
|
|
out:
|
2021-03-06 01:36:04 +03:00
|
|
|
free_dentry_path(page);
|
2012-06-05 17:10:23 +04:00
|
|
|
return rc;
|
2016-07-07 23:28:27 +03:00
|
|
|
|
|
|
|
out_err:
|
|
|
|
if (server->ops->close)
|
|
|
|
server->ops->close(xid, tcon, fid);
|
|
|
|
if (newinode)
|
|
|
|
iput(newinode);
|
|
|
|
goto out;
|
2012-06-05 17:10:23 +04:00
|
|
|
}
|
2010-06-16 21:40:16 +04:00
|
|
|
|
2012-06-22 12:39:14 +04:00
|
|
|
int
|
2012-06-05 17:10:23 +04:00
|
|
|
cifs_atomic_open(struct inode *inode, struct dentry *direntry,
|
2018-06-08 20:32:02 +03:00
|
|
|
struct file *file, unsigned oflags, umode_t mode)
|
2012-06-05 17:10:23 +04:00
|
|
|
{
|
|
|
|
int rc;
|
2012-06-20 11:21:16 +04:00
|
|
|
unsigned int xid;
|
2012-06-05 17:10:23 +04:00
|
|
|
struct tcon_link *tlink;
|
|
|
|
struct cifs_tcon *tcon;
|
2012-09-19 03:20:27 +04:00
|
|
|
struct TCP_Server_Info *server;
|
2022-10-15 03:18:32 +03:00
|
|
|
struct cifs_fid fid = {};
|
2012-09-19 17:22:45 +04:00
|
|
|
struct cifs_pending_open open;
|
2012-06-05 17:10:23 +04:00
|
|
|
__u32 oplock;
|
2012-09-19 03:20:26 +04:00
|
|
|
struct cifsFileInfo *file_info;
|
2022-10-04 00:43:50 +03:00
|
|
|
struct cifs_open_info_data buf = {};
|
2012-06-05 17:10:23 +04:00
|
|
|
|
2021-04-29 08:18:43 +03:00
|
|
|
if (unlikely(cifs_forced_shutdown(CIFS_SB(inode->i_sb))))
|
|
|
|
return -EIO;
|
|
|
|
|
2012-09-19 03:20:26 +04:00
|
|
|
/*
|
|
|
|
* Posix open is only called (at lookup time) for file create now. For
|
2012-06-05 17:10:23 +04:00
|
|
|
* opens (rather than creates), because we do not know if it is a file
|
|
|
|
* or directory yet, and current Samba no longer allows us to do posix
|
|
|
|
* open on dirs, we could end up wasting an open call on what turns out
|
|
|
|
* to be a dir. For file opens, we wait to call posix open till
|
|
|
|
* cifs_open. It could be added to atomic_open in the future but the
|
|
|
|
* performance tradeoff of the extra network request when EISDIR or
|
|
|
|
* EACCES is returned would have to be weighed against the 50% reduction
|
|
|
|
* in network traffic in the other paths.
|
|
|
|
*/
|
|
|
|
if (!(oflags & O_CREAT)) {
|
2012-11-05 15:39:32 +04:00
|
|
|
struct dentry *res;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Check for hashed negative dentry. We have already revalidated
|
|
|
|
* the dentry and it is fine. No need to perform another lookup.
|
|
|
|
*/
|
2016-07-05 16:44:53 +03:00
|
|
|
if (!d_in_lookup(direntry))
|
2012-11-05 15:39:32 +04:00
|
|
|
return -ENOENT;
|
|
|
|
|
|
|
|
res = cifs_lookup(inode, direntry, 0);
|
2012-06-05 17:10:23 +04:00
|
|
|
if (IS_ERR(res))
|
2012-06-22 12:39:14 +04:00
|
|
|
return PTR_ERR(res);
|
2012-06-05 17:10:23 +04:00
|
|
|
|
2012-06-10 14:48:09 +04:00
|
|
|
return finish_no_open(file, res);
|
2012-06-05 17:10:23 +04:00
|
|
|
}
|
|
|
|
|
2012-06-20 11:21:16 +04:00
|
|
|
xid = get_xid();
|
2012-06-05 17:10:23 +04:00
|
|
|
|
2014-08-20 04:25:34 +04:00
|
|
|
cifs_dbg(FYI, "parent inode = 0x%p name is: %pd and dentry = 0x%p\n",
|
|
|
|
inode, direntry, direntry);
|
2012-06-05 17:10:23 +04:00
|
|
|
|
|
|
|
tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb));
|
2013-04-04 10:16:21 +04:00
|
|
|
if (IS_ERR(tlink)) {
|
|
|
|
rc = PTR_ERR(tlink);
|
2012-06-20 11:21:16 +04:00
|
|
|
goto out_free_xid;
|
2013-04-04 10:16:21 +04:00
|
|
|
}
|
2012-06-05 17:10:23 +04:00
|
|
|
|
|
|
|
tcon = tlink_tcon(tlink);
|
2017-08-23 07:48:14 +03:00
|
|
|
|
|
|
|
rc = check_name(direntry, tcon);
|
|
|
|
if (rc)
|
2017-10-30 05:28:03 +03:00
|
|
|
goto out;
|
2017-08-23 07:48:14 +03:00
|
|
|
|
2012-09-19 03:20:27 +04:00
|
|
|
server = tcon->ses->server;
|
2012-06-05 17:10:23 +04:00
|
|
|
|
2012-09-19 17:22:44 +04:00
|
|
|
if (server->ops->new_lease_key)
|
|
|
|
server->ops->new_lease_key(&fid);
|
|
|
|
|
2012-09-19 17:22:45 +04:00
|
|
|
cifs_add_pending_open(&fid, tlink, &open);
|
|
|
|
|
2012-06-05 17:10:23 +04:00
|
|
|
rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode,
|
2022-10-04 00:43:50 +03:00
|
|
|
&oplock, &fid, &buf);
|
2012-09-19 17:22:45 +04:00
|
|
|
if (rc) {
|
|
|
|
cifs_del_pending_open(&open);
|
2012-06-05 17:10:23 +04:00
|
|
|
goto out;
|
2012-09-19 17:22:45 +04:00
|
|
|
}
|
2012-06-05 17:10:23 +04:00
|
|
|
|
2013-12-12 02:29:53 +04:00
|
|
|
if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
|
2018-06-08 20:22:02 +03:00
|
|
|
file->f_mode |= FMODE_CREATED;
|
2013-12-12 02:29:53 +04:00
|
|
|
|
2018-06-08 18:44:56 +03:00
|
|
|
rc = finish_open(file, direntry, generic_file_open);
|
2012-06-22 12:40:19 +04:00
|
|
|
if (rc) {
|
2012-09-19 03:20:27 +04:00
|
|
|
if (server->ops->close)
|
|
|
|
server->ops->close(xid, tcon, &fid);
|
2012-09-19 17:22:45 +04:00
|
|
|
cifs_del_pending_open(&open);
|
2012-06-05 17:10:23 +04:00
|
|
|
goto out;
|
2007-06-05 22:30:44 +04:00
|
|
|
}
|
2010-06-16 21:40:16 +04:00
|
|
|
|
2014-08-22 09:22:51 +04:00
|
|
|
if (file->f_flags & O_DIRECT &&
|
|
|
|
CIFS_SB(inode->i_sb)->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) {
|
|
|
|
if (CIFS_SB(inode->i_sb)->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
|
|
|
|
file->f_op = &cifs_file_direct_nobrl_ops;
|
|
|
|
else
|
|
|
|
file->f_op = &cifs_file_direct_ops;
|
|
|
|
}
|
|
|
|
|
2022-10-04 00:43:50 +03:00
|
|
|
file_info = cifs_new_fileinfo(&fid, file, tlink, oplock, buf.symlink_target);
|
2012-09-19 03:20:26 +04:00
|
|
|
if (file_info == NULL) {
|
2012-09-19 03:20:27 +04:00
|
|
|
if (server->ops->close)
|
|
|
|
server->ops->close(xid, tcon, &fid);
|
2012-09-19 17:22:45 +04:00
|
|
|
cifs_del_pending_open(&open);
|
2012-06-22 12:39:14 +04:00
|
|
|
rc = -ENOMEM;
|
cifs: Support fscache indexing rewrite
Change the cifs filesystem to take account of the changes to fscache's
indexing rewrite and reenable caching in cifs.
The following changes have been made:
(1) The fscache_netfs struct is no more, and there's no need to register
the filesystem as a whole.
(2) The session cookie is now an fscache_volume cookie, allocated with
fscache_acquire_volume(). That takes three parameters: a string
representing the "volume" in the index, a string naming the cache to
use (or NULL) and a u64 that conveys coherency metadata for the
volume.
For cifs, I've made it render the volume name string as:
"cifs,<ipaddress>,<sharename>"
where the sharename has '/' characters replaced with ';'.
This probably needs rethinking a bit as the total name could exceed
the maximum filename component length.
Further, the coherency data is currently just set to 0. It needs
something else doing with it - I wonder if it would suffice simply to
sum the resource_id, vol_create_time and vol_serial_number or maybe
hash them.
(3) The fscache_cookie_def is no more and needed information is passed
directly to fscache_acquire_cookie(). The cache no longer calls back
into the filesystem, but rather metadata changes are indicated at
other times.
fscache_acquire_cookie() is passed the same keying and coherency
information as before.
(4) The functions to set/reset cookies are removed and
fscache_use_cookie() and fscache_unuse_cookie() are used instead.
fscache_use_cookie() is passed a flag to indicate if the cookie is
opened for writing. fscache_unuse_cookie() is passed updates for the
metadata if we changed it (ie. if the file was opened for writing).
These are called when the file is opened or closed.
(5) cifs_setattr_*() are made to call fscache_resize() to change the size
of the cache object.
(6) The functions to read and write data are stubbed out pending a
conversion to use netfslib.
Changes
=======
ver #8:
- Abstract cache invalidation into a helper function.
- Fix some checkpatch warnings[3].
ver #7:
- Removed the accidentally added-back call to get the super cookie in
cifs_root_iget().
- Fixed the right call to cifs_fscache_get_super_cookie() to take account
of the "-o fsc" mount flag.
ver #6:
- Moved the change of gfpflags_allow_blocking() to current_is_kswapd() for
cifs here.
- Fixed one of the error paths in cifs_atomic_open() to jump around the
call to use the cookie.
- Fixed an additional successful return in the middle of cifs_open() to
use the cookie on the way out.
- Only get a volume cookie (and thus inode cookies) when "-o fsc" is
supplied to mount.
ver #5:
- Fixed a couple of bits of cookie handling[2]:
- The cookie should be released in cifs_evict_inode(), not
cifsFileInfo_put_final(). The cookie needs to persist beyond file
closure so that writepages will be able to write to it.
- fscache_use_cookie() needs to be called in cifs_atomic_open() as it is
for cifs_open().
ver #4:
- Fixed the use of sizeof with memset.
- tcon->vol_create_time is __le64 so doesn't need cpu_to_le64().
ver #3:
- Canonicalise the cifs coherency data to make the cache portable.
- Set volume coherency data.
ver #2:
- Use gfpflags_allow_blocking() rather than using flag directly.
- Upgraded to -rc4 to allow for upstream changes[1].
- fscache_acquire_volume() now returns errors.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Jeff Layton <jlayton@kernel.org>
cc: Steve French <smfrench@gmail.com>
cc: Shyam Prasad N <nspmangalore@gmail.com>
cc: linux-cifs@vger.kernel.org
cc: linux-cachefs@redhat.com
Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=23b55d673d7527b093cd97b7c217c82e70cd1af0 [1]
Link: https://lore.kernel.org/r/3419813.1641592362@warthog.procyon.org.uk/ [2]
Link: https://lore.kernel.org/r/CAH2r5muTanw9pJqzAHd01d9A8keeChkzGsCEH6=0rHutVLAF-A@mail.gmail.com/ [3]
Link: https://lore.kernel.org/r/163819671009.215744.11230627184193298714.stgit@warthog.procyon.org.uk/ # v1
Link: https://lore.kernel.org/r/163906982979.143852.10672081929614953210.stgit@warthog.procyon.org.uk/ # v2
Link: https://lore.kernel.org/r/163967187187.1823006.247415138444991444.stgit@warthog.procyon.org.uk/ # v3
Link: https://lore.kernel.org/r/164021579335.640689.2681324337038770579.stgit@warthog.procyon.org.uk/ # v4
Link: https://lore.kernel.org/r/3462849.1641593783@warthog.procyon.org.uk/ # v5
Link: https://lore.kernel.org/r/1318953.1642024578@warthog.procyon.org.uk/ # v6
Signed-off-by: Steve French <stfrench@microsoft.com>
2020-11-17 18:56:59 +03:00
|
|
|
goto out;
|
2012-06-05 17:10:23 +04:00
|
|
|
}
|
|
|
|
|
cifs: Support fscache indexing rewrite
Change the cifs filesystem to take account of the changes to fscache's
indexing rewrite and reenable caching in cifs.
The following changes have been made:
(1) The fscache_netfs struct is no more, and there's no need to register
the filesystem as a whole.
(2) The session cookie is now an fscache_volume cookie, allocated with
fscache_acquire_volume(). That takes three parameters: a string
representing the "volume" in the index, a string naming the cache to
use (or NULL) and a u64 that conveys coherency metadata for the
volume.
For cifs, I've made it render the volume name string as:
"cifs,<ipaddress>,<sharename>"
where the sharename has '/' characters replaced with ';'.
This probably needs rethinking a bit as the total name could exceed
the maximum filename component length.
Further, the coherency data is currently just set to 0. It needs
something else doing with it - I wonder if it would suffice simply to
sum the resource_id, vol_create_time and vol_serial_number or maybe
hash them.
(3) The fscache_cookie_def is no more and needed information is passed
directly to fscache_acquire_cookie(). The cache no longer calls back
into the filesystem, but rather metadata changes are indicated at
other times.
fscache_acquire_cookie() is passed the same keying and coherency
information as before.
(4) The functions to set/reset cookies are removed and
fscache_use_cookie() and fscache_unuse_cookie() are used instead.
fscache_use_cookie() is passed a flag to indicate if the cookie is
opened for writing. fscache_unuse_cookie() is passed updates for the
metadata if we changed it (ie. if the file was opened for writing).
These are called when the file is opened or closed.
(5) cifs_setattr_*() are made to call fscache_resize() to change the size
of the cache object.
(6) The functions to read and write data are stubbed out pending a
conversion to use netfslib.
Changes
=======
ver #8:
- Abstract cache invalidation into a helper function.
- Fix some checkpatch warnings[3].
ver #7:
- Removed the accidentally added-back call to get the super cookie in
cifs_root_iget().
- Fixed the right call to cifs_fscache_get_super_cookie() to take account
of the "-o fsc" mount flag.
ver #6:
- Moved the change of gfpflags_allow_blocking() to current_is_kswapd() for
cifs here.
- Fixed one of the error paths in cifs_atomic_open() to jump around the
call to use the cookie.
- Fixed an additional successful return in the middle of cifs_open() to
use the cookie on the way out.
- Only get a volume cookie (and thus inode cookies) when "-o fsc" is
supplied to mount.
ver #5:
- Fixed a couple of bits of cookie handling[2]:
- The cookie should be released in cifs_evict_inode(), not
cifsFileInfo_put_final(). The cookie needs to persist beyond file
closure so that writepages will be able to write to it.
- fscache_use_cookie() needs to be called in cifs_atomic_open() as it is
for cifs_open().
ver #4:
- Fixed the use of sizeof with memset.
- tcon->vol_create_time is __le64 so doesn't need cpu_to_le64().
ver #3:
- Canonicalise the cifs coherency data to make the cache portable.
- Set volume coherency data.
ver #2:
- Use gfpflags_allow_blocking() rather than using flag directly.
- Upgraded to -rc4 to allow for upstream changes[1].
- fscache_acquire_volume() now returns errors.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Jeff Layton <jlayton@kernel.org>
cc: Steve French <smfrench@gmail.com>
cc: Shyam Prasad N <nspmangalore@gmail.com>
cc: linux-cifs@vger.kernel.org
cc: linux-cachefs@redhat.com
Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=23b55d673d7527b093cd97b7c217c82e70cd1af0 [1]
Link: https://lore.kernel.org/r/3419813.1641592362@warthog.procyon.org.uk/ [2]
Link: https://lore.kernel.org/r/CAH2r5muTanw9pJqzAHd01d9A8keeChkzGsCEH6=0rHutVLAF-A@mail.gmail.com/ [3]
Link: https://lore.kernel.org/r/163819671009.215744.11230627184193298714.stgit@warthog.procyon.org.uk/ # v1
Link: https://lore.kernel.org/r/163906982979.143852.10672081929614953210.stgit@warthog.procyon.org.uk/ # v2
Link: https://lore.kernel.org/r/163967187187.1823006.247415138444991444.stgit@warthog.procyon.org.uk/ # v3
Link: https://lore.kernel.org/r/164021579335.640689.2681324337038770579.stgit@warthog.procyon.org.uk/ # v4
Link: https://lore.kernel.org/r/3462849.1641593783@warthog.procyon.org.uk/ # v5
Link: https://lore.kernel.org/r/1318953.1642024578@warthog.procyon.org.uk/ # v6
Signed-off-by: Steve French <stfrench@microsoft.com>
2020-11-17 18:56:59 +03:00
|
|
|
fscache_use_cookie(cifs_inode_cookie(file_inode(file)),
|
|
|
|
file->f_mode & FMODE_WRITE);
|
|
|
|
|
2012-06-05 17:10:23 +04:00
|
|
|
out:
|
|
|
|
cifs_put_tlink(tlink);
|
2012-06-20 11:21:16 +04:00
|
|
|
out_free_xid:
|
|
|
|
free_xid(xid);
|
2022-10-04 00:43:50 +03:00
|
|
|
cifs_free_open_info(&buf);
|
2012-06-22 12:39:14 +04:00
|
|
|
return rc;
|
2012-06-05 17:10:23 +04:00
|
|
|
}
|
|
|
|
|
2023-01-13 14:49:13 +03:00
|
|
|
int cifs_create(struct mnt_idmap *idmap, struct inode *inode,
|
2021-01-21 16:19:43 +03:00
|
|
|
struct dentry *direntry, umode_t mode, bool excl)
|
2012-06-05 17:10:23 +04:00
|
|
|
{
|
|
|
|
int rc;
|
2012-06-20 11:21:16 +04:00
|
|
|
unsigned int xid = get_xid();
|
2012-06-05 17:10:23 +04:00
|
|
|
/*
|
|
|
|
* BB below access is probably too much for mknod to request
|
|
|
|
* but we have to do query and setpathinfo so requesting
|
|
|
|
* less could fail (unless we want to request getatr and setatr
|
|
|
|
* permissions (only). At least for POSIX we do not have to
|
|
|
|
* request so much.
|
|
|
|
*/
|
|
|
|
unsigned oflags = O_EXCL | O_CREAT | O_RDWR;
|
|
|
|
struct tcon_link *tlink;
|
2012-09-19 03:20:27 +04:00
|
|
|
struct cifs_tcon *tcon;
|
|
|
|
struct TCP_Server_Info *server;
|
|
|
|
struct cifs_fid fid;
|
2012-06-05 17:10:23 +04:00
|
|
|
__u32 oplock;
|
2022-10-04 00:43:50 +03:00
|
|
|
struct cifs_open_info_data buf = {};
|
2012-06-05 17:10:23 +04:00
|
|
|
|
2014-08-20 04:25:34 +04:00
|
|
|
cifs_dbg(FYI, "cifs_create parent inode = 0x%p name is: %pd and dentry = 0x%p\n",
|
|
|
|
inode, direntry, direntry);
|
2012-06-05 17:10:23 +04:00
|
|
|
|
2022-10-17 17:45:21 +03:00
|
|
|
if (unlikely(cifs_forced_shutdown(CIFS_SB(inode->i_sb)))) {
|
|
|
|
rc = -EIO;
|
|
|
|
goto out_free_xid;
|
|
|
|
}
|
2021-04-29 08:18:43 +03:00
|
|
|
|
2012-06-05 17:10:23 +04:00
|
|
|
tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb));
|
|
|
|
rc = PTR_ERR(tlink);
|
|
|
|
if (IS_ERR(tlink))
|
2012-06-20 11:21:16 +04:00
|
|
|
goto out_free_xid;
|
2012-06-05 17:10:23 +04:00
|
|
|
|
2012-09-19 03:20:27 +04:00
|
|
|
tcon = tlink_tcon(tlink);
|
|
|
|
server = tcon->ses->server;
|
2012-09-19 17:22:44 +04:00
|
|
|
|
|
|
|
if (server->ops->new_lease_key)
|
|
|
|
server->ops->new_lease_key(&fid);
|
|
|
|
|
2022-10-04 00:43:50 +03:00
|
|
|
rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode, &oplock, &fid, &buf);
|
2012-09-19 03:20:27 +04:00
|
|
|
if (!rc && server->ops->close)
|
|
|
|
server->ops->close(xid, tcon, &fid);
|
2012-06-05 17:10:23 +04:00
|
|
|
|
2022-10-04 00:43:50 +03:00
|
|
|
cifs_free_open_info(&buf);
|
2010-09-30 03:51:11 +04:00
|
|
|
cifs_put_tlink(tlink);
|
2012-06-20 11:21:16 +04:00
|
|
|
out_free_xid:
|
|
|
|
free_xid(xid);
|
2005-04-17 02:20:36 +04:00
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
2023-01-13 14:49:16 +03:00
|
|
|
int cifs_mknod(struct mnt_idmap *idmap, struct inode *inode,
|
2021-01-21 16:19:43 +03:00
|
|
|
struct dentry *direntry, umode_t mode, dev_t device_number)
|
2005-04-17 02:20:36 +04:00
|
|
|
{
|
|
|
|
int rc = -EPERM;
|
2012-06-20 11:21:16 +04:00
|
|
|
unsigned int xid;
|
2005-04-17 02:20:36 +04:00
|
|
|
struct cifs_sb_info *cifs_sb;
|
2010-09-30 03:51:11 +04:00
|
|
|
struct tcon_link *tlink;
|
2014-01-16 15:53:34 +04:00
|
|
|
struct cifs_tcon *tcon;
|
2021-03-06 01:36:04 +03:00
|
|
|
const char *full_path;
|
|
|
|
void *page;
|
2005-04-17 02:20:36 +04:00
|
|
|
|
|
|
|
if (!old_valid_dev(device_number))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
cifs_sb = CIFS_SB(inode->i_sb);
|
2021-04-29 08:18:43 +03:00
|
|
|
if (unlikely(cifs_forced_shutdown(cifs_sb)))
|
|
|
|
return -EIO;
|
|
|
|
|
2010-09-30 03:51:11 +04:00
|
|
|
tlink = cifs_sb_tlink(cifs_sb);
|
|
|
|
if (IS_ERR(tlink))
|
|
|
|
return PTR_ERR(tlink);
|
|
|
|
|
2021-03-06 01:36:04 +03:00
|
|
|
page = alloc_dentry_path();
|
2014-01-16 15:53:34 +04:00
|
|
|
tcon = tlink_tcon(tlink);
|
2012-06-20 11:21:16 +04:00
|
|
|
xid = get_xid();
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2021-03-06 01:36:04 +03:00
|
|
|
full_path = build_path_from_dentry(direntry, page);
|
|
|
|
if (IS_ERR(full_path)) {
|
|
|
|
rc = PTR_ERR(full_path);
|
2010-08-05 21:58:22 +04:00
|
|
|
goto mknod_out;
|
|
|
|
}
|
|
|
|
|
2019-03-14 08:29:17 +03:00
|
|
|
rc = tcon->ses->server->ops->make_node(xid, inode, direntry, tcon,
|
|
|
|
full_path, mode,
|
|
|
|
device_number);
|
2010-08-05 21:58:22 +04:00
|
|
|
|
|
|
|
mknod_out:
|
2021-03-06 01:36:04 +03:00
|
|
|
free_dentry_path(page);
|
2012-06-20 11:21:16 +04:00
|
|
|
free_xid(xid);
|
2010-09-30 03:51:11 +04:00
|
|
|
cifs_put_tlink(tlink);
|
2005-04-17 02:20:36 +04:00
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
struct dentry *
|
2007-06-05 22:30:44 +04:00
|
|
|
cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
|
2012-06-11 01:13:09 +04:00
|
|
|
unsigned int flags)
|
2005-04-17 02:20:36 +04:00
|
|
|
{
|
2012-06-20 11:21:16 +04:00
|
|
|
unsigned int xid;
|
2005-04-17 02:20:36 +04:00
|
|
|
int rc = 0; /* to get around spurious gcc warning, set to zero here */
|
|
|
|
struct cifs_sb_info *cifs_sb;
|
2010-09-30 03:51:11 +04:00
|
|
|
struct tcon_link *tlink;
|
2011-05-27 08:34:02 +04:00
|
|
|
struct cifs_tcon *pTcon;
|
2005-04-17 02:20:36 +04:00
|
|
|
struct inode *newInode = NULL;
|
2021-03-06 01:36:04 +03:00
|
|
|
const char *full_path;
|
|
|
|
void *page;
|
2021-06-15 19:42:56 +03:00
|
|
|
int retry_count = 0;
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2012-06-20 11:21:16 +04:00
|
|
|
xid = get_xid();
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2014-08-20 04:25:34 +04:00
|
|
|
cifs_dbg(FYI, "parent inode = 0x%p name is: %pd and dentry = 0x%p\n",
|
|
|
|
parent_dir_inode, direntry, direntry);
|
2005-04-17 02:20:36 +04:00
|
|
|
|
|
|
|
/* check whether path exists */
|
|
|
|
|
|
|
|
cifs_sb = CIFS_SB(parent_dir_inode->i_sb);
|
2010-09-30 03:51:11 +04:00
|
|
|
tlink = cifs_sb_tlink(cifs_sb);
|
|
|
|
if (IS_ERR(tlink)) {
|
2012-06-20 11:21:16 +04:00
|
|
|
free_xid(xid);
|
2018-05-15 04:42:29 +03:00
|
|
|
return ERR_CAST(tlink);
|
2010-09-30 03:51:11 +04:00
|
|
|
}
|
|
|
|
pTcon = tlink_tcon(tlink);
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2017-08-23 07:48:14 +03:00
|
|
|
rc = check_name(direntry, pTcon);
|
2018-05-15 04:42:29 +03:00
|
|
|
if (unlikely(rc)) {
|
|
|
|
cifs_put_tlink(tlink);
|
|
|
|
free_xid(xid);
|
|
|
|
return ERR_PTR(rc);
|
|
|
|
}
|
2009-07-05 19:01:02 +04:00
|
|
|
|
2005-04-17 02:20:36 +04:00
|
|
|
/* can not grab the rename sem here since it would
|
|
|
|
deadlock in the cases (beginning of sys_rename itself)
|
|
|
|
in which we already have the sb rename sem */
|
2021-03-06 01:36:04 +03:00
|
|
|
page = alloc_dentry_path();
|
|
|
|
full_path = build_path_from_dentry(direntry, page);
|
|
|
|
if (IS_ERR(full_path)) {
|
2018-05-15 04:42:29 +03:00
|
|
|
cifs_put_tlink(tlink);
|
|
|
|
free_xid(xid);
|
2021-03-06 01:36:04 +03:00
|
|
|
free_dentry_path(page);
|
|
|
|
return ERR_CAST(full_path);
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|
|
|
|
|
2015-03-18 01:25:59 +03:00
|
|
|
if (d_really_is_positive(direntry)) {
|
2013-05-05 07:12:25 +04:00
|
|
|
cifs_dbg(FYI, "non-NULL inode in lookup\n");
|
2005-04-17 02:20:36 +04:00
|
|
|
} else {
|
2013-05-05 07:12:25 +04:00
|
|
|
cifs_dbg(FYI, "NULL inode in lookup\n");
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|
2013-05-05 07:12:25 +04:00
|
|
|
cifs_dbg(FYI, "Full path: %s inode = 0x%p\n",
|
2015-03-18 01:25:59 +03:00
|
|
|
full_path, d_inode(direntry));
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2021-06-15 19:42:56 +03:00
|
|
|
again:
|
2020-06-12 06:28:49 +03:00
|
|
|
if (pTcon->posix_extensions)
|
|
|
|
rc = smb311_posix_get_inode_info(&newInode, full_path, parent_dir_inode->i_sb, xid);
|
|
|
|
else if (pTcon->unix_ext) {
|
2012-06-05 17:10:23 +04:00
|
|
|
rc = cifs_get_inode_info_unix(&newInode, full_path,
|
|
|
|
parent_dir_inode->i_sb, xid);
|
|
|
|
} else {
|
2005-04-17 02:20:36 +04:00
|
|
|
rc = cifs_get_inode_info(&newInode, full_path, NULL,
|
2009-04-09 05:14:32 +04:00
|
|
|
parent_dir_inode->i_sb, xid, NULL);
|
2012-06-05 17:10:23 +04:00
|
|
|
}
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2018-05-15 04:26:32 +03:00
|
|
|
if (rc == 0) {
|
2007-06-05 22:30:44 +04:00
|
|
|
/* since paths are not looked up by component - the parent
|
2005-11-28 19:16:13 +03:00
|
|
|
directories are presumed to be good here */
|
2005-04-17 02:20:36 +04:00
|
|
|
renew_parental_timestamps(direntry);
|
2021-06-15 19:42:56 +03:00
|
|
|
} else if (rc == -EAGAIN && retry_count++ < 10) {
|
|
|
|
goto again;
|
2005-04-17 02:20:36 +04:00
|
|
|
} else if (rc == -ENOENT) {
|
2016-09-16 13:44:21 +03:00
|
|
|
cifs_set_time(direntry, jiffies);
|
2018-05-15 04:42:29 +03:00
|
|
|
newInode = NULL;
|
|
|
|
} else {
|
|
|
|
if (rc != -EACCES) {
|
|
|
|
cifs_dbg(FYI, "Unexpected lookup error %d\n", rc);
|
|
|
|
/* We special case check for Access Denied - since that
|
|
|
|
is a common return code */
|
|
|
|
}
|
|
|
|
newInode = ERR_PTR(rc);
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|
2021-03-06 01:36:04 +03:00
|
|
|
free_dentry_path(page);
|
2010-09-30 03:51:11 +04:00
|
|
|
cifs_put_tlink(tlink);
|
2012-06-20 11:21:16 +04:00
|
|
|
free_xid(xid);
|
2018-05-15 04:42:29 +03:00
|
|
|
return d_splice_alias(newInode, direntry);
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2012-06-11 00:03:43 +04:00
|
|
|
cifs_d_revalidate(struct dentry *direntry, unsigned int flags)
|
2005-04-17 02:20:36 +04:00
|
|
|
{
|
2019-09-30 20:06:20 +03:00
|
|
|
struct inode *inode;
|
2021-02-05 17:42:48 +03:00
|
|
|
int rc;
|
2019-09-30 20:06:20 +03:00
|
|
|
|
2012-06-11 00:03:43 +04:00
|
|
|
if (flags & LOOKUP_RCU)
|
2011-01-07 09:49:57 +03:00
|
|
|
return -ECHILD;
|
|
|
|
|
2015-03-18 01:25:59 +03:00
|
|
|
if (d_really_is_positive(direntry)) {
|
2019-09-30 20:06:20 +03:00
|
|
|
inode = d_inode(direntry);
|
|
|
|
if ((flags & LOOKUP_REVAL) && !CIFS_CACHE_READ(CIFS_I(inode)))
|
|
|
|
CIFS_I(inode)->time = 0; /* force reval */
|
|
|
|
|
2021-02-05 17:42:48 +03:00
|
|
|
rc = cifs_revalidate_dentry(direntry);
|
|
|
|
if (rc) {
|
|
|
|
cifs_dbg(FYI, "cifs_revalidate_dentry failed with rc=%d", rc);
|
|
|
|
switch (rc) {
|
|
|
|
case -ENOENT:
|
|
|
|
case -ESTALE:
|
|
|
|
/*
|
|
|
|
* Those errors mean the dentry is invalid
|
|
|
|
* (file was deleted or recreated)
|
|
|
|
*/
|
|
|
|
return 0;
|
|
|
|
default:
|
|
|
|
/*
|
|
|
|
* Otherwise some unexpected error happened
|
|
|
|
* report it as-is to VFS layer
|
|
|
|
*/
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
}
|
2011-10-18 12:58:50 +04:00
|
|
|
else {
|
|
|
|
/*
|
2012-05-02 15:19:09 +04:00
|
|
|
* If the inode wasn't known to be a dfs entry when
|
|
|
|
* the dentry was instantiated, such as when created
|
|
|
|
* via ->readdir(), it needs to be set now since the
|
|
|
|
* attributes will have been updated by
|
|
|
|
* cifs_revalidate_dentry().
|
2011-10-18 12:58:50 +04:00
|
|
|
*/
|
2019-09-30 20:06:20 +03:00
|
|
|
if (IS_AUTOMOUNT(inode) &&
|
2012-05-02 15:19:09 +04:00
|
|
|
!(direntry->d_flags & DCACHE_NEED_AUTOMOUNT)) {
|
|
|
|
spin_lock(&direntry->d_lock);
|
|
|
|
direntry->d_flags |= DCACHE_NEED_AUTOMOUNT;
|
|
|
|
spin_unlock(&direntry->d_lock);
|
|
|
|
}
|
|
|
|
|
2010-11-11 10:42:16 +03:00
|
|
|
return 1;
|
2011-10-18 12:58:50 +04:00
|
|
|
}
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|
|
|
|
|
2010-11-11 10:42:16 +03:00
|
|
|
/*
|
|
|
|
* This may be nfsd (or something), anyway, we can't see the
|
|
|
|
* intent of this. So, since this can be for creation, drop it.
|
|
|
|
*/
|
2012-06-11 00:03:43 +04:00
|
|
|
if (!flags)
|
2010-11-11 10:42:16 +03:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Drop the negative dentry, in order to make sure to use the
|
|
|
|
* case sensitive name which is specified by user if this is
|
|
|
|
* for creation.
|
|
|
|
*/
|
2012-06-11 00:03:43 +04:00
|
|
|
if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
|
2011-06-26 05:37:18 +04:00
|
|
|
return 0;
|
2010-11-11 10:42:16 +03:00
|
|
|
|
2016-09-16 13:44:21 +03:00
|
|
|
if (time_after(jiffies, cifs_get_time(direntry) + HZ) || !lookupCacheEnabled)
|
2010-11-11 10:42:16 +03:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
return 1;
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
/* static int cifs_d_delete(struct dentry *direntry)
|
|
|
|
{
|
|
|
|
int rc = 0;
|
|
|
|
|
2014-08-20 04:25:34 +04:00
|
|
|
cifs_dbg(FYI, "In cifs d_delete, name = %pd\n", direntry);
|
2005-04-17 02:20:36 +04:00
|
|
|
|
|
|
|
return rc;
|
|
|
|
} */
|
|
|
|
|
2009-02-20 08:57:07 +03:00
|
|
|
const struct dentry_operations cifs_dentry_ops = {
|
2005-04-17 02:20:36 +04:00
|
|
|
.d_revalidate = cifs_d_revalidate,
|
2011-01-14 21:45:47 +03:00
|
|
|
.d_automount = cifs_dfs_d_automount,
|
2007-06-05 22:30:44 +04:00
|
|
|
/* d_delete: cifs_d_delete, */ /* not needed except for debugging */
|
2005-04-17 02:20:36 +04:00
|
|
|
};
|
2005-08-23 07:09:43 +04:00
|
|
|
|
2013-05-22 02:22:44 +04:00
|
|
|
static int cifs_ci_hash(const struct dentry *dentry, struct qstr *q)
|
2005-08-23 07:09:43 +04:00
|
|
|
{
|
2011-01-07 09:49:28 +03:00
|
|
|
struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls;
|
2005-08-23 07:09:43 +04:00
|
|
|
unsigned long hash;
|
2013-09-05 16:38:11 +04:00
|
|
|
wchar_t c;
|
|
|
|
int i, charlen;
|
2005-08-23 07:09:43 +04:00
|
|
|
|
2016-06-10 17:51:30 +03:00
|
|
|
hash = init_name_hash(dentry);
|
2013-09-05 16:38:11 +04:00
|
|
|
for (i = 0; i < q->len; i += charlen) {
|
|
|
|
charlen = codepage->char2uni(&q->name[i], q->len - i, &c);
|
|
|
|
/* error out if we can't convert the character */
|
|
|
|
if (unlikely(charlen < 0))
|
|
|
|
return charlen;
|
|
|
|
hash = partial_name_hash(cifs_toupper(c), hash);
|
|
|
|
}
|
2005-08-23 07:09:43 +04:00
|
|
|
q->hash = end_name_hash(hash);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2016-07-31 23:37:25 +03:00
|
|
|
static int cifs_ci_compare(const struct dentry *dentry,
|
2011-01-07 09:49:27 +03:00
|
|
|
unsigned int len, const char *str, const struct qstr *name)
|
2005-08-23 07:09:43 +04:00
|
|
|
{
|
2016-07-30 01:23:59 +03:00
|
|
|
struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls;
|
2013-09-05 16:38:11 +04:00
|
|
|
wchar_t c1, c2;
|
|
|
|
int i, l1, l2;
|
2005-08-23 07:09:43 +04:00
|
|
|
|
2013-09-05 16:38:11 +04:00
|
|
|
/*
|
|
|
|
* We make the assumption here that uppercase characters in the local
|
|
|
|
* codepage are always the same length as their lowercase counterparts.
|
|
|
|
*
|
|
|
|
* If that's ever not the case, then this will fail to match it.
|
|
|
|
*/
|
|
|
|
if (name->len != len)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
for (i = 0; i < len; i += l1) {
|
|
|
|
/* Convert characters in both strings to UTF-16. */
|
|
|
|
l1 = codepage->char2uni(&str[i], len - i, &c1);
|
|
|
|
l2 = codepage->char2uni(&name->name[i], name->len - i, &c2);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If we can't convert either character, just declare it to
|
|
|
|
* be 1 byte long and compare the original byte.
|
|
|
|
*/
|
|
|
|
if (unlikely(l1 < 0 && l2 < 0)) {
|
|
|
|
if (str[i] != name->name[i])
|
|
|
|
return 1;
|
|
|
|
l1 = 1;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Here, we again ass|u|me that upper/lowercase versions of
|
|
|
|
* a character are the same length in the local NLS.
|
|
|
|
*/
|
|
|
|
if (l1 != l2)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
/* Now compare uppercase versions of these characters */
|
|
|
|
if (cifs_toupper(c1) != cifs_toupper(c2))
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
2005-08-23 07:09:43 +04:00
|
|
|
}
|
|
|
|
|
2009-02-20 08:57:07 +03:00
|
|
|
const struct dentry_operations cifs_ci_dentry_ops = {
|
2005-08-23 07:09:43 +04:00
|
|
|
.d_revalidate = cifs_d_revalidate,
|
|
|
|
.d_hash = cifs_ci_hash,
|
|
|
|
.d_compare = cifs_ci_compare,
|
2011-01-14 21:45:47 +03:00
|
|
|
.d_automount = cifs_dfs_d_automount,
|
2005-08-23 07:09:43 +04:00
|
|
|
};
|