#include <asm/processor.h>
#include <linux/inet.h>
#include <linux/module.h>
+#include <keys/user-type.h>
#include <net/ipv6.h>
#include "cifspdu.h"
#include "cifsglob.h"
}
}
- if (vol->multiuser && !(vol->secFlg & CIFSSEC_MAY_KRB5)) {
- cERROR(1, "Multiuser mounts currently require krb5 "
- "authentication!");
+#ifndef CONFIG_KEYS
+ /* Muliuser mounts require CONFIG_KEYS support */
+ if (vol->multiuser) {
+ cERROR(1, "Multiuser mounts require kernels with "
+ "CONFIG_KEYS enabled.");
goto cifs_parse_mount_err;
}
+#endif
if (vol->UNCip == NULL)
vol->UNCip = &vol->UNC[2];
return 0;
break;
default:
+ /* NULL username means anonymous session */
+ if (ses->user_name == NULL) {
+ if (!vol->nullauth)
+ return 0;
+ break;
+ }
+
/* anything else takes username/password */
- if (ses->user_name == NULL)
- return 0;
- if (strncmp(ses->user_name, vol->username,
+ if (strncmp(ses->user_name,
+ vol->username ? vol->username : "",
MAX_USERNAME_SIZE))
return 0;
if (strlen(vol->username) != 0 &&
cifs_put_tcp_session(server);
}
+#ifdef CONFIG_KEYS
+
+/* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */
+#define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1)
+
+/* Populate username and pw fields from keyring if possible */
+static int
+cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
+{
+ int rc = 0;
+ char *desc, *delim, *payload;
+ ssize_t len;
+ struct key *key;
+ struct TCP_Server_Info *server = ses->server;
+ struct sockaddr_in *sa;
+ struct sockaddr_in6 *sa6;
+ struct user_key_payload *upayload;
+
+ desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL);
+ if (!desc)
+ return -ENOMEM;
+
+ /* try to find an address key first */
+ switch (server->dstaddr.ss_family) {
+ case AF_INET:
+ sa = (struct sockaddr_in *)&server->dstaddr;
+ sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr);
+ break;
+ case AF_INET6:
+ sa6 = (struct sockaddr_in6 *)&server->dstaddr;
+ sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr);
+ break;
+ default:
+ cFYI(1, "Bad ss_family (%hu)", server->dstaddr.ss_family);
+ rc = -EINVAL;
+ goto out_err;
+ }
+
+ cFYI(1, "%s: desc=%s", __func__, desc);
+ key = request_key(&key_type_logon, desc, "");
+ if (IS_ERR(key)) {
+ if (!ses->domainName) {
+ cFYI(1, "domainName is NULL");
+ rc = PTR_ERR(key);
+ goto out_err;
+ }
+
+ /* didn't work, try to find a domain key */
+ sprintf(desc, "cifs:d:%s", ses->domainName);
+ cFYI(1, "%s: desc=%s", __func__, desc);
+ key = request_key(&key_type_logon, desc, "");
+ if (IS_ERR(key)) {
+ rc = PTR_ERR(key);
+ goto out_err;
+ }
+ }
+
+ down_read(&key->sem);
+ upayload = key->payload.data;
+ if (IS_ERR_OR_NULL(upayload)) {
+ rc = PTR_ERR(key);
+ goto out_key_put;
+ }
+
+ /* find first : in payload */
+ payload = (char *)upayload->data;
+ delim = strnchr(payload, upayload->datalen, ':');
+ cFYI(1, "payload=%s", payload);
+ if (!delim) {
+ cFYI(1, "Unable to find ':' in payload (datalen=%d)",
+ upayload->datalen);
+ rc = -EINVAL;
+ goto out_key_put;
+ }
+
+ len = delim - payload;
+ if (len > MAX_USERNAME_SIZE || len <= 0) {
+ cFYI(1, "Bad value from username search (len=%ld)", len);
+ rc = -EINVAL;
+ goto out_key_put;
+ }
+
+ vol->username = kstrndup(payload, len, GFP_KERNEL);
+ if (!vol->username) {
+ cFYI(1, "Unable to allocate %ld bytes for username", len);
+ rc = -ENOMEM;
+ goto out_key_put;
+ }
+ cFYI(1, "%s: username=%s", __func__, vol->username);
+
+ len = key->datalen - (len + 1);
+ if (len > MAX_PASSWORD_SIZE || len <= 0) {
+ cFYI(1, "Bad len for password search (len=%ld)", len);
+ rc = -EINVAL;
+ kfree(vol->username);
+ vol->username = NULL;
+ goto out_key_put;
+ }
+
+ ++delim;
+ vol->password = kstrndup(delim, len, GFP_KERNEL);
+ if (!vol->password) {
+ cFYI(1, "Unable to allocate %ld bytes for password", len);
+ rc = -ENOMEM;
+ kfree(vol->username);
+ vol->username = NULL;
+ goto out_key_put;
+ }
+
+out_key_put:
+ up_read(&key->sem);
+ key_put(key);
+out_err:
+ kfree(desc);
+ cFYI(1, "%s: returning %d", __func__, rc);
+ return rc;
+}
+#else /* ! CONFIG_KEYS */
+static inline int
+cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)),
+ struct cifs_ses *ses __attribute__((unused)))
+{
+ return -ENOSYS;
+}
+#endif /* CONFIG_KEYS */
+
static bool warned_on_ntlm; /* globals init to false automatically */
static struct cifs_ses *
#define CIFS_DEFAULT_IOSIZE (1024 * 1024)
/*
- * Windows only supports a max of 60k reads. Default to that when posix
- * extensions aren't in force.
+ * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
+ * those values when posix extensions aren't in force. In actuality here, we
+ * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
+ * to be ok with the extra byte even though Windows doesn't send writes that
+ * are that large.
+ *
+ * Citation:
+ *
+ * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
*/
#define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
+#define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
static unsigned int
cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info)
{
__u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
struct TCP_Server_Info *server = tcon->ses->server;
- unsigned int wsize = pvolume_info->wsize ? pvolume_info->wsize :
- CIFS_DEFAULT_IOSIZE;
+ unsigned int wsize;
+
+ /* start with specified wsize, or default */
+ if (pvolume_info->wsize)
+ wsize = pvolume_info->wsize;
+ else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
+ wsize = CIFS_DEFAULT_IOSIZE;
+ else
+ wsize = CIFS_DEFAULT_NON_POSIX_WSIZE;
/* can server support 24-bit write sizes? (via UNIX extensions) */
if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
return -EINVAL;
if (volume_info->nullauth) {
- cFYI(1, "null user");
- volume_info->username = kzalloc(1, GFP_KERNEL);
- if (volume_info->username == NULL)
- return -ENOMEM;
+ cFYI(1, "Anonymous login");
+ kfree(volume_info->username);
+ volume_info->username = NULL;
} else if (volume_info->username) {
/* BB fixme parse for domain name here */
cFYI(1, "Username: %s", volume_info->username);
if (ses->capabilities & CAP_UNICODE) {
smb_buffer->Flags2 |= SMBFLG2_UNICODE;
length =
- cifs_strtoUCS((__le16 *) bcc_ptr, tree,
+ cifs_strtoUTF16((__le16 *) bcc_ptr, tree,
6 /* max utf8 char length in bytes */ *
(/* server len*/ + 256 /* share len */), nls_codepage);
bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
/* mostly informational -- no need to fail on error here */
kfree(tcon->nativeFileSystem);
- tcon->nativeFileSystem = cifs_strndup_from_ucs(bcc_ptr,
+ tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr,
bytes_left, is_unicode,
nls_codepage);
return rc;
}
+static int
+cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses)
+{
+ switch (ses->server->secType) {
+ case Kerberos:
+ vol->secFlg = CIFSSEC_MUST_KRB5;
+ return 0;
+ case NTLMv2:
+ vol->secFlg = CIFSSEC_MUST_NTLMV2;
+ break;
+ case NTLM:
+ vol->secFlg = CIFSSEC_MUST_NTLM;
+ break;
+ case RawNTLMSSP:
+ vol->secFlg = CIFSSEC_MUST_NTLMSSP;
+ break;
+ case LANMAN:
+ vol->secFlg = CIFSSEC_MUST_LANMAN;
+ break;
+ }
+
+ return cifs_set_cifscreds(vol, ses);
+}
+
static struct cifs_tcon *
cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid)
{
+ int rc;
struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb);
struct cifs_ses *ses;
struct cifs_tcon *tcon = NULL;
struct smb_vol *vol_info;
- char username[28]; /* big enough for "krb50x" + hex of ULONG_MAX 6+16 */
- /* We used to have this as MAX_USERNAME which is */
- /* way too big now (256 instead of 32) */
vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL);
if (vol_info == NULL) {
goto out;
}
- snprintf(username, sizeof(username), "krb50x%x", fsuid);
- vol_info->username = username;
vol_info->local_nls = cifs_sb->local_nls;
vol_info->linux_uid = fsuid;
vol_info->cred_uid = fsuid;
vol_info->local_lease = master_tcon->local_lease;
vol_info->no_linux_ext = !master_tcon->unix_ext;
- /* FIXME: allow for other secFlg settings */
- vol_info->secFlg = CIFSSEC_MUST_KRB5;
+ rc = cifs_set_vol_auth(vol_info, master_tcon->ses);
+ if (rc) {
+ tcon = ERR_PTR(rc);
+ goto out;
+ }
/* get a reference for the same TCP session */
spin_lock(&cifs_tcp_ses_lock);
if (ses->capabilities & CAP_UNIX)
reset_cifs_unix_caps(0, tcon, NULL, vol_info);
out:
+ kfree(vol_info->username);
+ kfree(vol_info->password);
kfree(vol_info);
return tcon;
projects / karo-tx-linux.git / blobdiff