This patch enables optional (via Kconfig, specifying vers=2.0 on
mount) support for testing SMB2.02 dialect
diff --git a/fs/cifs/Kconfig b/fs/cifs/Kconfig
index 2075ddf..461e2f5 100644
--- a/fs/cifs/Kconfig
+++ b/fs/cifs/Kconfig
@@ -172,6 +172,21 @@ config CIFS_SMB2
Unless you are a developer or tester, say N.
+config CIFS_SMB20_DIALECT
+ bool "Support for original SMB2.0 dialect (EXPERIMENTAL)"
+ depends on CIFS && CIFS_SMB2
+
+ help
+ This enables experimental support for the original SMB2.02 dialect.
+ This could be helpful for developers testing against the earliest
+ SMB2 capable servers such as Windows Vista, Samba Version 3.6
+ and Windows 2008. Without this selection enabled, only the
+ more recent SMB2.1 and SMB3 dialects are enabled. Since SMB2.1
+ and SMB3 dialects are better than the original SMB2 dialect for
+ more recent servers (such as Windows 2008R2, Windows 7, and Samba 4),
+ and earlier servers support the cifs protocol well, unless you are a
+ developer or tester, say N.
+
config CIFS_FSCACHE
bool "Provide CIFS client caching support"
depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index f5af252..3763624 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -178,6 +178,7 @@ struct smb_rqst {
enum smb_version {
Smb_1 = 1,
+ Smb_20,
Smb_21,
Smb_30,
};
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 5c670b9..8a17cf2 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -274,6 +274,7 @@ static const match_table_t cifs_cacheflavor_tokens = {
static const match_table_t cifs_smb_version_tokens = {
{ Smb_1, SMB1_VERSION_STRING },
+ { Smb_20, SMB20_VERSION_STRING},
{ Smb_21, SMB21_VERSION_STRING },
{ Smb_30, SMB30_VERSION_STRING },
};
@@ -1074,6 +1075,11 @@ cifs_parse_smb_version(char *value, struct smb_vol *vol)
vol->vals = &smb1_values;
break;
#ifdef CONFIG_CIFS_SMB2
+#ifdef CONFIG_CIFS_SMB20_DIALECT
+ case Smb_20:
+ vol->ops = &smb21_operations; /* currently identical with 2.1 */
+ vol->vals = &smb20_values;
+#endif /* CIFS_SMB20_DIALECT */
case Smb_21:
vol->ops = &smb21_operations;
vol->vals = &smb21_values;
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 4d9dbe0..3dd47dc 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -643,6 +643,25 @@ struct smb_version_operations smb21_operations = {
.new_lease_key = smb2_new_lease_key,
};
+#ifdef CONFIG_CIFS_SMB20_DIALECT
+struct smb_version_values smb20_values = {
+ .version_string = SMB20_VERSION_STRING,
+ .protocol_id = SMB20_PROT_ID,
+ .req_capabilities = 0, /* MBZ */
+ .large_lock_type = 0,
+ .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
+ .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
+ .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
+ .header_size = sizeof(struct smb2_hdr),
+ .max_header_size = MAX_SMB2_HDR_SIZE,
+ .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
+ .lock_cmd = SMB2_LOCK,
+ .cap_unix = 0,
+ .cap_nt_find = SMB2_NT_FIND,
+ .cap_large_files = SMB2_LARGE_FILES,
+};
+#endif /* CONFIG_CIFS_SMB2_DIALECT */
+
struct smb_version_values smb21_values = {
.version_string = SMB21_VERSION_STRING,
.protocol_id = SMB21_PROT_ID,
--
Thanks,
Steve
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