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Re: [PATCH 06b/26] Security: Make NFSD work with detached security
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From:
David Howells <dhowells@...>
To: <unlisted-recipients@...>, <@...>
Cc: <dhowells@...>, J. Bruce Fields <bfields@...>, <sds@...>, <casey@...>, <Trond.Myklebust@...>, <neilb@...>, <linux-kernel@...>, <selinux@...>, <linux-security-module@...>, <nfs@...>
Subject:
Re: [PATCH 06b/26] Security: Make NFSD work with detached security
Date: Thursday, January 17, 2008 - 7:02 pm
David Howells <dhowells@redhat.com> wrote:
quoted text
> J. Bruce Fields <bfields@fieldses.org> wrote: > > > Just curious--why? Are get_kernel_security(), etc., particularly > > expensive? > > It involves a kmalloc(). That means an extra possibility for an error. Plus > it may allow you to cache the result of checking whether, say, SELinux > security labels are allowed to be set when passed over NFS (if such is > possible).
Apart from that, though, no, it's not particularly expensive. David --
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Messages in current thread:
[PATCH 00/26] Permit filesystem local caching
, David Howells
, (Tue Jan 15, 7:46 pm)
Re: [PATCH 00/26] Permit filesystem local caching
, Kyle Moffett
, (Tue Jan 15, 10:24 pm)
Re: [PATCH 00/26] Permit filesystem local caching
, David Howells
, (Wed Jan 16, 12:55 pm)
Re: [PATCH 00/26] Permit filesystem local caching
, James Morris
, (Tue Jan 15, 9:52 pm)
Re: [PATCH 00/26] Permit filesystem local caching
, James Morris
, (Tue Jan 15, 8:58 pm)
Re: [PATCH 00/26] Permit filesystem local caching
, David Howells
, (Wed Jan 16, 12:48 pm)
[PATCH 26/26] NFS: Separate caching by superblock, explicitl...
, David Howells
, (Tue Jan 15, 7:49 pm)
[PATCH 25/26] NFS: Display local caching state
, David Howells
, (Tue Jan 15, 7:49 pm)
[PATCH 24/26] NFS: Configuration and mount option changes to...
, David Howells
, (Tue Jan 15, 7:49 pm)
[PATCH 23/26] NFS: Use local caching
, David Howells
, (Tue Jan 15, 7:48 pm)
[PATCH 21/26] CacheFiles: A cache that backs onto a mounted ...
, David Howells
, (Tue Jan 15, 7:48 pm)
[PATCH 22/26] NFS: Fix memory leak
, David Howells
, (Tue Jan 15, 7:48 pm)
[PATCH 19/26] CacheFiles: Permit the page lock state to be m...
, David Howells
, (Tue Jan 15, 7:48 pm)
[PATCH 20/26] CacheFiles: Export things for CacheFiles
, David Howells
, (Tue Jan 15, 7:48 pm)
[PATCH 18/26] CacheFiles: Add a hook to write a single page ...
, David Howells
, (Tue Jan 15, 7:48 pm)
[PATCH 15/26] FS-Cache: Generic filesystem caching facility
, David Howells
, (Tue Jan 15, 7:48 pm)
[PATCH 17/26] CacheFiles: Be consistent about the use of map...
, David Howells
, (Tue Jan 15, 7:48 pm)
[PATCH 16/26] CacheFiles: Add missing copy_page export for i...
, David Howells
, (Tue Jan 15, 7:48 pm)
[PATCH 08/26] Add a secctx_to_secid() LSM hook to go along w...
, David Howells
, (Tue Jan 15, 7:47 pm)
Re: [PATCH 08/26] Add a secctx_to_secid() LSM hook to go alo...
, James Morris
, (Tue Jan 15, 9:05 pm)
Re: [PATCH 08/26] Add a secctx_to_secid() LSM hook to go alo...
, Paul Moore
, (Wed Jan 16, 9:41 am)
Re: [PATCH 08/26] Add a secctx_to_secid() LSM hook to go alo...
, James Morris
, (Wed Jan 16, 6:13 pm)
Re: [PATCH 08/26] Add a secctx_to_secid() LSM hook to go alo...
, Paul Moore
, (Wed Jan 16, 6:19 pm)
Re: [PATCH 08/26] Add a secctx_to_secid() LSM hook to go alo...
, Casey Schaufler
, (Wed Jan 16, 1:08 pm)
[PATCH 13/26] FS-Cache: Recruit a couple of page flags for c...
, David Howells
, (Tue Jan 15, 7:48 pm)
[PATCH 12/26] FS-Cache: Release page->private after faile...
, David Howells
, (Tue Jan 15, 7:47 pm)
[PATCH 14/26] FS-Cache: Provide an add_wait_queue_tail() fun...
, David Howells
, (Tue Jan 15, 7:48 pm)
[PATCH 10/26] Security: Add a kernel_service object class to...
, David Howells
, (Tue Jan 15, 7:47 pm)
[PATCH 09/26] Security: Pre-add additional non-caching classes
, David Howells
, (Tue Jan 15, 7:47 pm)
[PATCH 11/26] Security: Allow kernel services to override LS...
, David Howells
, (Tue Jan 15, 7:47 pm)
[PATCH 06/26] Security: Separate task security context from ...
, David Howells
, (Tue Jan 15, 7:47 pm)
[PATCH 06b/26] Security: Make NFSD work with detached security
, David Howells
, (Thu Jan 17, 1:17 pm)
Re: [PATCH 06b/26] Security: Make NFSD work with detached se...
, J. Bruce Fields
, (Thu Jan 17, 4:48 pm)
Re: [PATCH 06b/26] Security: Make NFSD work with detached se...
, David Howells
, (Thu Jan 17, 6:48 pm)
Re: [PATCH 06b/26] Security: Make NFSD work with detached se...
, David Howells
, (Thu Jan 17, 7:02 pm)
[PATCH 06a/26] Extra task_struct -> task_security separation
, David Howells
, (Thu Jan 17, 1:14 pm)
[PATCH 07/26] Security: De-embed task security record from t...
, David Howells
, (Tue Jan 15, 7:47 pm)
[PATCH 05/26] Security: Change current->fs[ug]id to curre...
, David Howells
, (Tue Jan 15, 7:47 pm)
[PATCH 03/26] KEYS: Allow the callout data to be passed as a...
, David Howells
, (Tue Jan 15, 7:47 pm)
[PATCH 04/26] KEYS: Add keyctl function to get a security la...
, David Howells
, (Tue Jan 15, 7:47 pm)
Re: [PATCH 04/26] KEYS: Add keyctl function to get a securit...
, Stephen Smalley
, (Wed Jan 16, 11:47 am)
[PATCH 01/26] KEYS: Increase the payload size when instantia...
, David Howells
, (Tue Jan 15, 7:46 pm)
[PATCH 02/26] KEYS: Check starting keyring as part of search
, David Howells
, (Tue Jan 15, 7:47 pm)
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