Add support for smb3 alias/fstype in mount.cifs.c

As we will slowly move towards smb3 filesystem,
supporting through "mount -t smb3" is important.

Signed-off-by: Kenneth D'souza <kdsouza@redhat.com>
---
 Makefile.am    |  4 ++++
 mount.cifs.c   |  8 +++++++-
 mount.cifs.rst | 12 +++++++++---
 3 files changed, 20 insertions(+), 4 deletions(-)

ср, 13 нояб. 2019 г. в 09:01, Kenneth D'souza <kdsouza@redhat.com>:
>
> As we will slowly move towards smb3 filesystem,
> supporting through "mount -t smb3" is important.
>
> Signed-off-by: Kenneth D'souza <kdsouza@redhat.com>
> ---
>  Makefile.am    |  4 ++++
>  mount.cifs.c   |  8 +++++++-
>  mount.cifs.rst | 12 +++++++++---
>  3 files changed, 20 insertions(+), 4 deletions(-)
>
> diff --git a/Makefile.am b/Makefile.am
> index 8291b99..1af2573 100644
> --- a/Makefile.am
> +++ b/Makefile.am
> @@ -111,3 +111,7 @@ CLEANFILES += $(rst_man_pages)
>  endif
>
>  SUBDIRS = contrib
> +
> +install-exec-hook:
> +       (cd $(ROOTSBINDIR) && ln -sf mount.cifs mount.smb3)
> +       (cd $(man8dir) && ln -sf mount.cifs.8 mount.smb3.8)
> diff --git a/mount.cifs.c b/mount.cifs.c
> index 6935fe1..0ed9d0a 100644
> --- a/mount.cifs.c
> +++ b/mount.cifs.c
> @@ -192,7 +192,7 @@ struct parsed_mount_info {
>  };
>
>  static const char *thisprogram;
> -static const char *cifs_fstype = "cifs";
> +static const char *cifs_fstype;
>
>  static int parse_unc(const char *unc_name, struct parsed_mount_info *parsed_info);
>
> @@ -1986,6 +1986,12 @@ int main(int argc, char **argv)
>         if (thisprogram == NULL)
>                 thisprogram = "mount.cifs";
>
> +       if(strcmp(thisprogram, "mount.cifs") == 0)
> +               cifs_fstype = "cifs";
> +
> +        if(strcmp(thisprogram, "mount.smb3") == 0)
> +              cifs_fstype = "smb3";
> +
>         /* allocate parsed_info as shared anonymous memory range */
>         parsed_info = mmap((void *)0, sizeof(*parsed_info), PROT_READ | PROT_WRITE,
>                            MAP_ANONYMOUS | MAP_SHARED, -1, 0);
> diff --git a/mount.cifs.rst b/mount.cifs.rst
> index ee5086c..67ec629 100644
> --- a/mount.cifs.rst
> +++ b/mount.cifs.rst
> @@ -1,6 +1,6 @@
> -==========
> -mount.cifs
> -==========
> +=====================
> +mount.cifs mount.smb3
> +=====================
>
>  --------------------------------------------------
>  mount using the Common Internet File System (CIFS)
> @@ -23,6 +23,12 @@ protocol and is supported by most Windows servers, Azure (cloud storage),
>  Macs and many other commercial servers and Network Attached Storage
>  appliances as well as by the popular Open Source server Samba.
>
> +``mount.smb3`` mounts only SMB3 filesystem. It is usually invoked
> +indirectly by the mount(8) command when using the "-t smb3" option.
> +The ``smb3`` filesystem type was added in kernel-4.18 and above.
> +It works in a similar fashion as mount.cifs except it passes filesystem
> +type as smb3.
> +
>  The mount.cifs utility attaches the UNC name (exported network
>  resource) specified as service (using ``//server/share`` syntax, where
>  "server" is the server name or IP address and "share" is the name of
> --
> 2.21.0
>

Merged, thanks.
--
Best regards,
Pavel Shilovsky