[Ocfs2-devel] [PATCH] Adding ocfs support to blkid

[Mark Fasheh <mark.fasheh@oracle.com>]

Could we call it "ocfs" instead of "ocfs2" below? We will likely be bumping
up the version number in the header for ocfs version 2 when it's released.
	--Mark

On Wed, Feb 04, 2004 at 12:38:12AM -0800, Rusty Lynch wrote:
> The following patch adds ocfs support to blkid.
> 
>     --rusty
> 
> # This is a BitKeeper generated patch for the following project:
> # Project Name: Ext2 filesystem utilities
> # This patch format is intended for GNU patch command version 2.5 or higher.
> # This patch includes the following deltas:
> #	           ChangeSet	1.1327  -> 1.1328 
> #	   lib/blkid/probe.c	1.15    -> 1.16   
> #	   lib/blkid/probe.h	1.9     -> 1.10   
> #
> # The following is the BitKeeper ChangeSet Log
> # --------------------------------------------
> # 04/02/03	rusty@stratocaster.com	1.1328
> # Adding support for the Oracle Cluster File System (ocfs)
> # --------------------------------------------
> #
> diff -Nru a/lib/blkid/probe.c b/lib/blkid/probe.c
> --- a/lib/blkid/probe.c	Wed Feb  4 00:21:03 2004
> +++ b/lib/blkid/probe.c	Wed Feb  4 00:21:03 2004
> @@ -312,6 +312,36 @@
>  	return 1;
>  }
>  
> +static int probe_ocfs(int fd __BLKID_ATTR((unused)), 
> +		      blkid_cache cache __BLKID_ATTR((unused)), 
> +		      blkid_dev dev,
> +		      struct blkid_magic *id __BLKID_ATTR((unused)), 
> +		      unsigned char *buf)
> +{
> +	struct ocfs_volume_header ovh;
> +	struct ocfs_volume_label ovl;
> +	
> +	if (lseek(fd, 0, SEEK_SET) != 0)
> +		return -1;
> +
> +	if (read(fd, (char *) &ovh, sizeof(ovh)) != sizeof(ovh))
> +		return -1;
> +
> +	if (strncmp(ovh.signature, OCFS_MAGIC, sizeof(OCFS_MAGIC)) != 0)
> +		return -1;
> +
> +	if (lseek(fd, 512, SEEK_SET) != 512)
> +		return -1;
> +
> +	if (read(fd, (char *) &ovl, sizeof(ovl)) != sizeof(ovl)) 
> +		return -1;
> +
> +	blkid_set_tag(dev, "LABEL", ovl.label, ocfslabellen(ovl));
> +	blkid_set_tag(dev, "MOUNT", ovh.mount, ocfsmountlen(ovh));
> +	set_uuid(dev, ovl.vol_id);
> +	return 0;
> +}
> +
>  /*
>   * BLKID_BLK_OFFS is at least as large as the highest bim_kboff defined
>   * in the type_array table below + bim_kbalign.
> @@ -371,6 +401,7 @@
>    { "swap",	 0, 0x1ff6, 10, "SWAPSPACE2",		0 },
>    { "swap",	 0, 0x3ff6, 10, "SWAP-SPACE",		0 },
>    { "swap",	 0, 0x3ff6, 10, "SWAPSPACE2",		0 },
> +  { "ocfs2",	 0,	 8,  9,	 "OracleCFS",  probe_ocfs },
>    {   NULL,	 0,	 0,  0, NULL,			NULL }
>  };
>  
> diff -Nru a/lib/blkid/probe.h b/lib/blkid/probe.h
> --- a/lib/blkid/probe.h	Wed Feb  4 00:21:03 2004
> +++ b/lib/blkid/probe.h	Wed Feb  4 00:21:03 2004
> @@ -209,6 +209,27 @@
>  	__u32	h_blksize;
>  };
>  
> +struct ocfs_volume_header {
> +	u_char	minor_version[4];
> +	u_char	major_version[4];
> +	u_char	signature[128];
> +	u_char  mount[128];
> +	u_char  mount_len[2];
> +};
> +
> +struct ocfs_volume_label {
> +	u_char	disk_lock[48];
> +	u_char	label[64];	
> +	u_char	label_len[2];
> +	u_char  vol_id[16];
> +	u_char  vol_id_len[2];
> +};
> +
> +#define ocfslabellen(o)	((uint)o.label_len[0] + (((uint) o.label_len[1]) << 8))
> +#define ocfsmountlen(o)	((uint)o.mount_len[0] + (((uint) o.mount_len[1])<<8))
> +
> +#define OCFS_MAGIC "OracleCFS"
> +
>  #define ISODCL(from, to) (to - from + 1)
>  struct iso_volume_descriptor {
>  	char type[ISODCL(1,1)]; /* 711 */
> _______________________________________________
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--
Mark Fasheh
Software Developer, Oracle Corp
mark.fasheh@oracle.com