Getting vnode + credentials of a file from a struct mount and UFS inode #

Jonathan Stuart jstuart at adaranet.com
Wed Apr 13 21:37:36 UTC 2011


Yes, however getvnode() does initialize a struct file *.. but f_cred seems to not contain valid/correct entries.
In my last post I probably should have pointed out that I have the inode stored from another operation.

        Jon

-----Original Message-----
From: Matthew Fleming [mailto:mdf356 at gmail.com]
Sent: Wednesday, April 13, 2011 2:35 PM
To: Jonathan Stuart
Cc: freebsd-hackers at freebsd.org
Subject: Re: Getting vnode + credentials of a file from a struct mount and UFS inode #

On Wed, Apr 13, 2011 at 2:18 PM, Jonathan Stuart <jstuart at adaranet.com> wrote:
> Hi Matthew,
>
> Thanks, I'll give it a shot.. for some reason f_cred off the vnode is returning all zeros for uid/gid, and
> pulling the VTOI does the same thing (using getvnode()).. do these not get initialized properly?

f_cred is a field in struct file, not struct vnode, so I'm confused as
to what you're referring to.

Cheers,
matthew

> -----Original Message-----
> From: Matthew Fleming [mailto:mdf356 at gmail.com]
> Sent: Wednesday, April 13, 2011 1:48 PM
> To: Jonathan Stuart
> Cc: freebsd-hackers at freebsd.org
> Subject: Re: Getting vnode + credentials of a file from a struct mount and UFS inode #
>
> On Wed, Apr 13, 2011 at 12:31 PM, Jonathan Stuart <jstuart at adaranet.com> wrote:
>> Hi,
>>
>> I'd like to pull the owner/group ownership from a file (the information I have about the file is it's UFS inode # and it's struct mount *).  I'm sure there's got to be a function that would return a vnode and I could VTOI() to get this information from the inode.. but I'm having a brainfreeze.
>>
>
> VFS_VGET(mp, ino, flags, &vp) is probably what you want.
>
> Cheers,
> matthew
>


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