[PATCH 1/2] cifs: Move string length definitions to uapi
scott.lovenberg at gmail.com
scott.lovenberg at gmail.com
Thu Jul 25 11:35:20 MDT 2013
From: Scott Lovenberg <scott.lovenberg at gmail.com>
The string lengths for username, domainname, password and share have
been moved into their own header file in uapi so the mount helper can
use autoconf to define the size of the string lengths instead of
trying to keep the two in sync manually. The names have also been
changed to be more easily understood, using the "CIFS" prefix and "LEN"
suffix rather than "SIZE" which could be confusing.
Signed-off-by: Scott Lovenberg <scott.lovenberg at gmail.com>
---
fs/cifs/AUTHORS | 2 ++
fs/cifs/cifsencrypt.c | 2 +-
fs/cifs/cifsglob.h | 7 ++-----
fs/cifs/connect.c | 20 ++++++++++----------
fs/cifs/sess.c | 16 ++++++++--------
include/uapi/linux/cifs/cifs_mount.h | 25 +++++++++++++++++++++++++
6 files changed, 48 insertions(+), 24 deletions(-)
create mode 100644 include/uapi/linux/cifs/cifs_mount.h
diff --git a/fs/cifs/AUTHORS b/fs/cifs/AUTHORS
index ea940b1..6804e2d 100644
--- a/fs/cifs/AUTHORS
+++ b/fs/cifs/AUTHORS
@@ -39,6 +39,8 @@ Shaggy (Dave Kleikamp) for innumerable small fs suggestions and some good cleanu
Gunter Kukkukk (testing and suggestions for support of old servers)
Igor Mammedov (DFS support)
Jeff Layton (many, many fixes, as well as great work on the cifs Kerberos code)
+Scott Lovenberg
+
Test case and Bug Report contributors
-------------------------------------
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index bb84d7c..194f9cc 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -421,7 +421,7 @@ find_domain_name(struct cifs_ses *ses, const struct nls_table *nls_cp)
if (blobptr + attrsize > blobend)
break;
if (type == NTLMSSP_AV_NB_DOMAIN_NAME) {
- if (!attrsize || attrsize >= MAX_DOMAINNAME_SIZE)
+ if (!attrsize || attrsize >= CIFS_MAX_DOMAINNAME_LEN)
break;
if (!ses->domainName) {
ses->domainName =
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 64bb4c5..b07b122 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -28,6 +28,7 @@
#include "cifsacl.h"
#include <crypto/internal/hash.h>
#include <linux/scatterlist.h>
+#include <uapi/linux/cifs/cifs_mount.h>
#ifdef CONFIG_CIFS_SMB2
#include "smb2pdu.h"
#endif
@@ -41,12 +42,8 @@
#define MAX_SES_INFO 2
#define MAX_TCON_INFO 4
-#define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
+#define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + CIFS_MAX_SHARE_LEN + 1)
#define MAX_SERVER_SIZE 15
-#define MAX_SHARE_SIZE 80
-#define MAX_DOMAINNAME_SIZE 256 /* maximum fully qualified domain name (FQDN) */
-#define MAX_USERNAME_SIZE 256 /* reasonable maximum for current servers */
-#define MAX_PASSWORD_SIZE 512 /* max for windows seems to be 256 wide chars */
#define CIFS_MIN_RCV_POOL 4
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 3f9dcf7..20ac9d4 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1575,8 +1575,8 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
if (string == NULL)
goto out_nomem;
- if (strnlen(string, MAX_USERNAME_SIZE) >
- MAX_USERNAME_SIZE) {
+ if (strnlen(string, CIFS_MAX_USERNAME_LEN) >
+ CIFS_MAX_USERNAME_LEN) {
printk(KERN_WARNING "CIFS: username too long\n");
goto cifs_parse_mount_err;
}
@@ -1675,8 +1675,8 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
if (string == NULL)
goto out_nomem;
- if (strnlen(string, MAX_DOMAINNAME_SIZE)
- == MAX_DOMAINNAME_SIZE) {
+ if (strnlen(string, CIFS_MAX_DOMAINNAME_LEN)
+ == CIFS_MAX_DOMAINNAME_LEN) {
printk(KERN_WARNING "CIFS: domain name too"
" long\n");
goto cifs_parse_mount_err;
@@ -2221,13 +2221,13 @@ static int match_session(struct cifs_ses *ses, struct smb_vol *vol)
/* anything else takes username/password */
if (strncmp(ses->user_name,
vol->username ? vol->username : "",
- MAX_USERNAME_SIZE))
+ CIFS_MAX_USERNAME_LEN))
return 0;
if (strlen(vol->username) != 0 &&
ses->password != NULL &&
strncmp(ses->password,
vol->password ? vol->password : "",
- MAX_PASSWORD_SIZE))
+ CIFS_MAX_PASSWORD_LEN))
return 0;
}
return 1;
@@ -2277,8 +2277,8 @@ cifs_put_smb_ses(struct cifs_ses *ses)
#ifdef CONFIG_KEYS
-/* strlen("cifs:a:") + MAX_DOMAINNAME_SIZE + 1 */
-#define CIFSCREDS_DESC_SIZE (7 + MAX_DOMAINNAME_SIZE + 1)
+/* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */
+#define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1)
/* Populate username and pw fields from keyring if possible */
static int
@@ -2352,7 +2352,7 @@ cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
}
len = delim - payload;
- if (len > MAX_USERNAME_SIZE || len <= 0) {
+ if (len > CIFS_MAX_USERNAME_LEN || len <= 0) {
cifs_dbg(FYI, "Bad value from username search (len=%zd)\n",
len);
rc = -EINVAL;
@@ -2369,7 +2369,7 @@ cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username);
len = key->datalen - (len + 1);
- if (len > MAX_PASSWORD_SIZE || len <= 0) {
+ if (len > CIFS_MAX_PASSWORD_LEN || len <= 0) {
cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len);
rc = -EINVAL;
kfree(vol->username);
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index 57b1537..a0a62db 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -197,7 +197,7 @@ static void unicode_domain_string(char **pbcc_area, struct cifs_ses *ses,
bytes_ret = 0;
} else
bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, ses->domainName,
- MAX_DOMAINNAME_SIZE, nls_cp);
+ CIFS_MAX_DOMAINNAME_LEN, nls_cp);
bcc_ptr += 2 * bytes_ret;
bcc_ptr += 2; /* account for null terminator */
@@ -226,7 +226,7 @@ static void unicode_ssetup_strings(char **pbcc_area, struct cifs_ses *ses,
*(bcc_ptr+1) = 0;
} else {
bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, ses->user_name,
- MAX_USERNAME_SIZE, nls_cp);
+ CIFS_MAX_USERNAME_LEN, nls_cp);
}
bcc_ptr += 2 * bytes_ret;
bcc_ptr += 2; /* account for null termination */
@@ -246,8 +246,8 @@ static void ascii_ssetup_strings(char **pbcc_area, struct cifs_ses *ses,
/* BB what about null user mounts - check that we do this BB */
/* copy user */
if (ses->user_name != NULL) {
- strncpy(bcc_ptr, ses->user_name, MAX_USERNAME_SIZE);
- bcc_ptr += strnlen(ses->user_name, MAX_USERNAME_SIZE);
+ strncpy(bcc_ptr, ses->user_name, CIFS_MAX_USERNAME_LEN);
+ bcc_ptr += strnlen(ses->user_name, CIFS_MAX_USERNAME_LEN);
}
/* else null user mount */
*bcc_ptr = 0;
@@ -255,8 +255,8 @@ static void ascii_ssetup_strings(char **pbcc_area, struct cifs_ses *ses,
/* copy domain */
if (ses->domainName != NULL) {
- strncpy(bcc_ptr, ses->domainName, MAX_DOMAINNAME_SIZE);
- bcc_ptr += strnlen(ses->domainName, MAX_DOMAINNAME_SIZE);
+ strncpy(bcc_ptr, ses->domainName, CIFS_MAX_DOMAINNAME_LEN);
+ bcc_ptr += strnlen(ses->domainName, CIFS_MAX_DOMAINNAME_LEN);
} /* else we will send a null domain name
so the server will default to its own domain */
*bcc_ptr = 0;
@@ -501,7 +501,7 @@ int build_ntlmssp_auth_blob(unsigned char *pbuffer,
} else {
int len;
len = cifs_strtoUTF16((__le16 *)tmp, ses->domainName,
- MAX_USERNAME_SIZE, nls_cp);
+ CIFS_MAX_USERNAME_LEN, nls_cp);
len *= 2; /* unicode is 2 bytes each */
sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
sec_blob->DomainName.Length = cpu_to_le16(len);
@@ -517,7 +517,7 @@ int build_ntlmssp_auth_blob(unsigned char *pbuffer,
} else {
int len;
len = cifs_strtoUTF16((__le16 *)tmp, ses->user_name,
- MAX_USERNAME_SIZE, nls_cp);
+ CIFS_MAX_USERNAME_LEN, nls_cp);
len *= 2; /* unicode is 2 bytes each */
sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
sec_blob->UserName.Length = cpu_to_le16(len);
diff --git a/include/uapi/linux/cifs/cifs_mount.h b/include/uapi/linux/cifs/cifs_mount.h
new file mode 100644
index 0000000..1485781
--- /dev/null
+++ b/include/uapi/linux/cifs/cifs_mount.h
@@ -0,0 +1,25 @@
+/*
+ * include/uapi/linux/cifs/cifs_mount.h
+ *
+ * Author(s): Scott Lovenberg (scott.lovenberg at gmail.com)
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU Lesser General Public License for more details.
+ */
+#ifndef _CIFS_MOUNT_H
+#define _CIFS_MOUNT_H
+
+/* Max string lengths for cifs mounting options. */
+#define CIFS_MAX_DOMAINNAME_LEN 256 /* max fully qualified domain name */
+#define CIFS_MAX_USERNAME_LEN 256 /* reasonable max for current servers */
+#define CIFS_MAX_PASSWORD_LEN 512 /* Windows max seems to be 256 wide chars */
+#define CIFS_MAX_SHARE_LEN 80
+
+#endif /* _CIFS_MOUNT_H */
--
1.8.1.4
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