From: Andreas Dilger <adilger@whamcloud.com>
To: lustre-devel@lists.lustre.org
Subject: [lustre-devel] [PATCH 29/37] lustre: handles: discard h_owner in favour of h_ops
Date: Wed, 27 Feb 2019 06:37:49 +0000 [thread overview]
Message-ID: <FC69F452-EB61-4535-A2DC-5B2052224885@whamcloud.com> (raw)
In-Reply-To: <155053494646.24125.10155576042684274174.stgit@noble.brown>
On Feb 18, 2019, at 17:09, NeilBrown <neilb@suse.com> wrote:
>
> lustre_handles assigned a 64bit unique identifier (a 'cookie') to
> objects of various types and stored them in a hash table, allowing
> them to be accessed by the cookie.
>
> The is a facility for type checking by recording an 'owner' for each
> object, and checking the owner on lookup. Unfortunately this is not
> used - owner is always zero.
>
> Eahc object also contains an h_ops pointer which can be used to
> reliably identify an owner.
>
> So discard h_owner, pass and 'ops' pointer to class_handle2object(),
> and only return objects for which the h_ops matches.
>
> Signed-off-by: NeilBrown <neilb@suse.com>
The h_owner is not used in the client code, but it is still used in the
server code to ensure that only clients which have already opened a file
handle can use the open file handle cookie to re-open the file. The
h_owner in this case is an MDS-local pointer to the client export data,
so just using the h_ops pointer (which is generic to the class of users,
not the specific user) would not provide this functionality.
Cheers, Andreas
---
Andreas Dilger
Principal Lustre Architect
Whamcloud
next prev parent reply other threads:[~2019-02-27 6:37 UTC|newest]
Thread overview: 105+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-19 0:09 [lustre-devel] [PATCH 00/37] More lustre patches from obdclass NeilBrown
2019-02-19 0:09 ` [lustre-devel] [PATCH 01/37] lustre: obdclass: char obd_ioctl_getdata type NeilBrown
2019-02-24 18:35 ` James Simmons
2019-02-19 0:09 ` [lustre-devel] [PATCH 02/37] lustre: llite: don't use class_setup_tunables() NeilBrown
2019-02-24 16:35 ` James Simmons
2019-02-25 22:27 ` NeilBrown
2019-02-26 22:18 ` James Simmons
2019-02-24 16:52 ` [lustre-devel] [PATCH 03/37] lustre: embed typ_kobj if obd_type James Simmons
2019-02-25 22:38 ` NeilBrown
2019-02-26 20:41 ` Simmons, James A.
2019-02-19 0:09 ` [lustre-devel] [PATCH 14/37] lustre: llog: change lgh_refcount to struct kref NeilBrown
2019-02-25 18:16 ` Andreas Dilger
2019-02-19 0:09 ` [lustre-devel] [PATCH 13/37] lustre: llog: remove lgh_hdr_lock NeilBrown
2019-02-24 20:29 ` James Simmons
2019-02-25 18:16 ` Andreas Dilger
2019-02-19 0:09 ` [lustre-devel] [PATCH 07/37] lustre: obd_type: discard obd_type_lock NeilBrown
2019-02-24 17:02 ` James Simmons
2019-02-19 0:09 ` [lustre-devel] [PATCH 08/37] lustre: obdclass: don't copy ops structures in to new type NeilBrown
2019-02-24 17:03 ` James Simmons
2019-02-19 0:09 ` [lustre-devel] [PATCH 16/37] lustre: obdclass: typo: Banlance -> Balance NeilBrown
2019-02-24 17:39 ` James Simmons
2019-02-19 0:09 ` [lustre-devel] [PATCH 05/37] lustre: obd_type: use typ_kobj.name as typ_name NeilBrown
2019-02-24 16:56 ` James Simmons
2019-02-19 0:09 ` [lustre-devel] [PATCH 03/37] lustre: embed typ_kobj if obd_type NeilBrown
2019-02-19 0:09 ` [lustre-devel] [PATCH 09/37] lustre: obdclass: fix module load locking NeilBrown
2019-02-24 17:04 ` James Simmons
2019-02-19 0:09 ` [lustre-devel] [PATCH 17/37] lustre: simplify lprocfs_read_frac_helper NeilBrown
2019-02-24 17:52 ` James Simmons
2019-02-26 23:59 ` NeilBrown
2019-02-27 1:06 ` Andreas Dilger
2019-02-19 0:09 ` [lustre-devel] [PATCH 18/37] lustre: obdclass: discard lprocfs_single/seq_release NeilBrown
2019-02-24 17:53 ` James Simmons
2019-02-19 0:09 ` [lustre-devel] [PATCH 12/37] lustre: remove unused function in linkea NeilBrown
2019-02-25 18:16 ` Andreas Dilger
2019-02-19 0:09 ` [lustre-devel] [PATCH 10/37] lustre: kernelcomm: pass correct gfp_t to kmalloc NeilBrown
2019-02-24 17:05 ` James Simmons
2019-02-25 18:16 ` Andreas Dilger
2019-02-19 0:09 ` [lustre-devel] [PATCH 21/37] lustre: remove several MAX_STRING_SIZE defines NeilBrown
2019-02-24 19:07 ` James Simmons
2019-02-27 0:41 ` NeilBrown
2019-02-25 18:16 ` Andreas Dilger
2019-02-19 0:09 ` [lustre-devel] [PATCH 19/37] lustre: discard lprocfs_strnstr() NeilBrown
2019-02-24 17:53 ` James Simmons
2019-02-19 0:09 ` [lustre-devel] [PATCH 15/37] lustre: llog_obd: Convert loc_refcount to refcount_t NeilBrown
2019-02-25 18:16 ` Andreas Dilger
2019-02-19 0:09 ` [lustre-devel] [PATCH 11/37] lustre: kernelcomm: make libcfs_kkuc_msg_put static NeilBrown
2019-02-24 17:15 ` James Simmons
2019-02-26 23:45 ` NeilBrown
2019-02-27 22:36 ` James Simmons
2019-02-27 22:37 ` James Simmons
2019-02-19 0:09 ` [lustre-devel] [PATCH 04/37] lustre: collect all resource releasing for obj_type NeilBrown
2019-02-24 16:54 ` James Simmons
2019-02-19 0:09 ` [lustre-devel] [PATCH 06/37] lustre: obd_type: discard obd_types linked list NeilBrown
2019-02-24 17:00 ` James Simmons
2019-02-19 0:09 ` [lustre-devel] [PATCH 20/37] lustre: convert rsi_sem to a spinlock NeilBrown
2019-02-25 18:16 ` Andreas Dilger
2019-02-27 0:22 ` NeilBrown
2019-02-27 1:00 ` Andreas Dilger
2019-02-19 0:09 ` [lustre-devel] [PATCH 32/37] lustre: portals_handle: rename ops to owner NeilBrown
2019-02-19 0:09 ` [lustre-devel] [PATCH 22/37] lustre: lprocfs: use log2.h macros instead of shift loop NeilBrown
2019-02-24 18:09 ` James Simmons
2019-02-26 20:55 ` James Simmons
2019-02-27 0:51 ` NeilBrown
2019-02-27 0:54 ` Andreas Dilger
2019-02-19 0:09 ` [lustre-devel] [PATCH 25/37] lustre: deprecate libcfs_debug_vmsg2 NeilBrown
2019-02-24 20:02 ` James Simmons
2019-02-25 18:16 ` Andreas Dilger
2019-02-19 0:09 ` [lustre-devel] [PATCH 30/37] lustre: handle: move refcount into the lustre_handle NeilBrown
2019-02-27 6:32 ` Andreas Dilger
2019-02-27 21:48 ` NeilBrown
2019-02-27 22:14 ` Andreas Dilger
2019-02-19 0:09 ` [lustre-devel] [PATCH 28/37] lustre: remove scope and source from class_incref and class_decref NeilBrown
2019-02-27 6:52 ` Andreas Dilger
2019-02-28 0:39 ` NeilBrown
2019-02-19 0:09 ` [lustre-devel] [PATCH 26/37] lustre: remove libcfs_debug_vmsg2 NeilBrown
2019-02-25 18:16 ` Andreas Dilger
2019-02-19 0:09 ` [lustre-devel] [PATCH 23/37] lustre: prefer to use tabs for alignment NeilBrown
2019-02-24 18:51 ` James Simmons
2019-02-25 18:16 ` Andreas Dilger
2019-02-19 0:09 ` [lustre-devel] [PATCH 27/37] lustre: discard lu_ref NeilBrown
2019-02-24 20:28 ` James Simmons
2019-02-27 1:17 ` NeilBrown
2019-02-27 5:35 ` Andreas Dilger
2019-03-01 6:45 ` Mike Pershin
2019-02-19 0:09 ` [lustre-devel] [PATCH 29/37] lustre: handles: discard h_owner in favour of h_ops NeilBrown
2019-02-27 6:37 ` Andreas Dilger [this message]
2019-02-27 21:41 ` NeilBrown
2019-02-28 6:41 ` Andreas Dilger
2019-02-19 0:09 ` [lustre-devel] [PATCH 33/37] lustre: portals_handle: remove locking from class_handle2object() NeilBrown
2019-02-19 0:09 ` [lustre-devel] [PATCH 34/37] lustre: portals_handle: use hlist for hash lists NeilBrown
2019-02-19 0:09 ` [lustre-devel] [PATCH 31/37] lustre: discard OBD_FREE_RCU NeilBrown
2019-02-19 0:09 ` [lustre-devel] [PATCH 24/37] lustre: lu_object: remove extra newline from debug printing NeilBrown
2019-02-24 19:08 ` James Simmons
2019-02-25 18:16 ` Andreas Dilger
2019-02-19 0:09 ` [lustre-devel] [PATCH 35/37] lustre: portals_handle: discard h_lock NeilBrown
2019-02-19 0:09 ` [lustre-devel] [PATCH 37/37] lustre: obd_sysfs: error-check value stored in jobid_var NeilBrown
2019-02-27 6:17 ` Andreas Dilger
2019-03-01 2:35 ` NeilBrown
2019-03-01 8:32 ` Andreas Dilger
2019-03-01 14:30 ` Patrick Farrell
2019-03-14 0:34 ` NeilBrown
2019-03-14 14:12 ` Patrick Farrell
2019-03-14 22:56 ` NeilBrown
2019-03-14 23:05 ` Andreas Dilger
2019-02-19 0:09 ` [lustre-devel] [PATCH 36/37] lustre: remove unused fields from struct obd_device NeilBrown
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