mount -tcoda /dev/cfs0 /mnt no longer works in -test9 and newer?

mount -tcoda /dev/cfs0 /mnt no longer works in -test9 and newer?

[Pavel Machek]

Hi!

It complains

coda_read_super: Bad mount data
coda_read_super: device index: 0

and will not mount. What do I need to mount coda?
								Pavel
-- 
I'm pavel@ucw.cz. "In my country we have almost anarchy and I don't care."
Panos Katsaloulis describing me w.r.t. patents at discuss@linmodems.org
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Re: mount -tcoda /dev/cfs0 /mnt no longer works in -test9 and newer?

[Jan Harkes]

On Mon, Nov 06, 2000 at 10:35:39AM +0100, Pavel Machek wrote:
> Hi!
> 
> It complains
> 
> coda_read_super: Bad mount data
> coda_read_super: device index: 0
> 
> and will not mount. What do I need to mount coda?
> 								Pavel

Miklos Szeredi sent a patch to support multiple mountpoints/coda
devices. However, the code falls back on the default device (cfs0)
when the mountdata is incorrect. So the problem must be unrelated
to the "Bad mount data" error message.

The code to mount with the correct mountdata looks like this:

      #include <linux/coda.h>

      muxfd = open("/dev/cfs0", O_RDWR);

      struct coda_mount_data mountdata;
      mountdata.version = CODA_MOUNT_VERSION;
      mountdata.fd = muxfd

      error = mount("coda", "/coda", "coda",  MS_MGC_VAL,
		    (void *)&mountdata);

Jan

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Re: mount -tcoda /dev/cfs0 /mnt no longer works in -test9 and newer?

[Pavel Machek]

[-- Attachment #1: muttWbQtHE --]
[-- Type: text/plain, Size: 1317 bytes --]

Hi!

> > It complains
> > 
> > coda_read_super: Bad mount data
> > coda_read_super: device index: 0
> > 
> > and will not mount. What do I need to mount coda?
> > 								Pavel
> 
> Miklos Szeredi sent a patch to support multiple mountpoints/coda
> devices. However, the code falls back on the default device (cfs0)
> when the mountdata is incorrect. So the problem must be unrelated
> to the "Bad mount data" error message.
> 
> The code to mount with the correct mountdata looks like this:
> 
>       #include <linux/coda.h>
> 
>       muxfd = open("/dev/cfs0", O_RDWR);
> 
>       struct coda_mount_data mountdata;
>       mountdata.version = CODA_MOUNT_VERSION;
>       mountdata.fd = muxfd
> 
>       error = mount("coda", "/coda", "coda",  MS_MGC_VAL,
> 		    (void *)&mountdata);

This does not work:

open("/dev/cfs0", O_RDWR)               = -1 ENODEV (No such device)
mount("coda", "/mnt", "coda", 0xc0ed0000, 0xbffffc04coda_read_super:
Bad file
coda_read_super: device index: 0
coda_read_super: No pseudo device
) = -1 EINVAL (Invalid argument)
_exit(-1)                               = ?

:-(. [I attached full source to my mount utility.]
								Pavel
-- 
I'm pavel@ucw.cz. "In my country we have almost anarchy and I don't care."
Panos Katsaloulis describing me w.r.t. patents at discuss@linmodems.org

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: mount.c --]
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#include <dirent.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <signal.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#ifdef SOLARIS
#include <sys/types32.h>
#include <sys/fcntl.h>
#include <sys/mount.h>
#include <sys/mntent.h>
#include <sys/mnttab.h>
#endif
#include <sys/stat.h>
#include <sys/time.h>
#include "/usr/src/linux/include/linux/coda.h"
#define MS_MGC_VAL 0xC0ED0000 /* magic flag number to indicate "new" flags */


void main(void)
{
	int muxfd = open("/dev/cfs0", O_RDWR);
	int error;

	struct coda_mount_data mountdata;
	mountdata.version = CODA_MOUNT_VERSION;
	mountdata.fd = muxfd;

	error = mount("coda", "/mnt", "coda",  MS_MGC_VAL,
		      (void *)&mountdata);
}

[BUG] coda went from c 67 5 to c 67 0 [was Re: mount -tcoda /dev/cfs0 /mnt no longer works in -test9 and newer?]

[Pavel Machek]

Hi!

I found where problem with coda lies: it went from character device at
67:5 to character device at 67:0. Ouch, ugly. Is it bug or what?
								Pavel
-- 
I'm pavel@ucw.cz. "In my country we have almost anarchy and I don't care."
Panos Katsaloulis describing me w.r.t. patents at discuss@linmodems.org
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Re: [BUG] coda went from c 67 5 to c 67 0 [was Re: mount -tcoda /dev/cfs0 /mnt no longer works in -test9 and newer?]

[Jan Harkes]

On Fri, Nov 10, 2000 at 10:48:08PM +0100, Pavel Machek wrote:
> Hi!
> 
> I found where problem with coda lies: it went from character device at
> 67:5 to character device at 67:0. Ouch, ugly. Is it bug or what?
> 								Pavel

No, it always has been c67,0. It simply ignored the minor number up
until recently.

Jan

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