2012/10/10 Steve French <smfrench@xxxxxxxxx>:
> 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
What's a problem with a non-experimental support of SMB2.0 dialect? In
this case we don't need to add new Kconfig option.
--
Best regards,
Pavel Shilovsky.
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