From: Ashish Khurange <ashishk@it.iitb.ac.in>
To: phillip@lougher.demon.co.uk
Cc: linux-fsdevel@vger.kernel.org
Subject: Re: dentry object
Date: Tue, 28 Feb 2006 22:17:40 +0530 [thread overview]
Message-ID: <44047EAC.4080207@it.iitb.ac.in> (raw)
In-Reply-To: <E1FE3bW-0001ks-6C@pr-webmail-1.mail.demon.net>
phillip@lougher.demon.co.uk wrote:
I am sorry, if I am not using right terms. Please consider.
I have one basic query. I tried to google for 'dentry object' but didnt
found the right answer. When I have dentry object of a file. Can I
traverse till root's dentry using dentry->d_parent, step by step?
How does kernel shrinks dentry cache? Does it removes any of the dentry
which is in 'parent path' of the concerned dentry object?
If kernel can remove such parent dentry, what happens when I access
dentry->d_parent.
Thanks,
- Ashish
>
>
>
>
>ashishk@it.iitb.ac.in wrote:
>
>
>>Hi,
>> From a given dentry, i want to generate that files absolute path. I
>>don't want to use d_path, because it doesn't cross mount points.
>>Here is the algorithm what I have decided.
>>
>>1. From dentry object get dname.
>>2. store in string
>>3. if IS_ROOT (dentry) goto stop
>>3. find its parent using dentry->parent
>>4. go to 1.
>>
>>Stop.
>>
>>Will this work?
>>
>>I have one more question, when I have dentry of a file, then if dentries
>>of all its parents up to '/' are present in the dcache?
>>
>>
>>
>
>AFAIK yes, unless the filesystem is being exported in which case this may
>not hold. Read Documentation/filesystems/Exporting.
>
>Phillip
>
>
>
>>Regards,
>>- Ashish K.
>>-
>>To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
>>the body of a message to majordomo@vger.kernel.org
>>More majordomo info at http://vger.kernel.org/majordomo-info.html
>>
>>
>>
>
>
>
next prev parent reply other threads:[~2006-02-28 16:48 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-28 11:04 dentry object Ashish Khurange
2006-02-28 12:05 ` phillip
2006-02-28 16:47 ` Ashish Khurange [this message]
2006-02-28 16:00 ` Ian Kent
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