From: bfields@fieldses.org (J. Bruce Fields)
To: Olga Kornievskaia <olga.kornievskaia@gmail.com>
Cc: bfields@redhat.com, linux-nfs@vger.kernel.org
Subject: Re: [PATCH v4 4/8] NFSD add COPY_NOTIFY operation
Date: Wed, 17 Jul 2019 19:07:26 -0400 [thread overview]
Message-ID: <20190717230726.GA26801@fieldses.org> (raw)
In-Reply-To: <20190708192352.12614-5-olga.kornievskaia@gmail.com>
On Mon, Jul 08, 2019 at 03:23:48PM -0400, Olga Kornievskaia wrote:
> @@ -726,24 +727,53 @@ struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *sla
> /*
> * Create a unique stateid_t to represent each COPY.
> */
> -int nfs4_init_cp_state(struct nfsd_net *nn, struct nfsd4_copy *copy)
> +static int nfs4_init_cp_state(struct nfsd_net *nn, void *ptr, stateid_t *stid)
> {
> int new_id;
>
> idr_preload(GFP_KERNEL);
> spin_lock(&nn->s2s_cp_lock);
> - new_id = idr_alloc_cyclic(&nn->s2s_cp_stateids, copy, 0, 0, GFP_NOWAIT);
> + new_id = idr_alloc_cyclic(&nn->s2s_cp_stateids, ptr, 0, 0, GFP_NOWAIT);
> spin_unlock(&nn->s2s_cp_lock);
> idr_preload_end();
> if (new_id < 0)
> return 0;
> - copy->cp_stateid.si_opaque.so_id = new_id;
> - copy->cp_stateid.si_opaque.so_clid.cl_boot = nn->boot_time;
> - copy->cp_stateid.si_opaque.so_clid.cl_id = nn->s2s_cp_cl_id;
> + stid->si_opaque.so_id = new_id;
> + stid->si_opaque.so_clid.cl_boot = nn->boot_time;
> + stid->si_opaque.so_clid.cl_id = nn->s2s_cp_cl_id;
> return 1;
> }
>
> -void nfs4_free_cp_state(struct nfsd4_copy *copy)
> +int nfs4_init_copy_state(struct nfsd_net *nn, struct nfsd4_copy *copy)
> +{
> + return nfs4_init_cp_state(nn, copy, ©->cp_stateid);
> +}
This little bit of refactoring could go into a seperate patch. It's
easier for me to review lots of smaller patches.
But I don't understand why you're doing it.
Also, I'm a little suspicious of code that doesn't initialize an object
till after it's been added to a global structure. The more typical
pattern is:
initialize foo
take locks, add foo global structure, drop locks.
This prevents anyone doing a lookup from finding "foo" while it's still
in a partially initialized state.
--b.
next prev parent reply other threads:[~2019-07-17 23:07 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-08 19:23 [PATCH v4 0/8] server-side support for "inter" SSC copy Olga Kornievskaia
2019-07-08 19:23 ` [PATCH v4 1/8] NFSD fill-in netloc4 structure Olga Kornievskaia
2019-07-17 21:13 ` J. Bruce Fields
2019-07-22 19:59 ` Olga Kornievskaia
2019-07-30 15:48 ` Olga Kornievskaia
2019-07-30 15:51 ` J. Bruce Fields
2019-07-08 19:23 ` [PATCH v4 2/8] NFSD add ca_source_server<> to COPY Olga Kornievskaia
2019-07-17 21:40 ` J. Bruce Fields
2019-07-22 20:00 ` Olga Kornievskaia
2019-07-08 19:23 ` [PATCH v4 3/8] NFSD return nfs4_stid in nfs4_preprocess_stateid_op Olga Kornievskaia
2019-07-08 19:23 ` [PATCH v4 4/8] NFSD add COPY_NOTIFY operation Olga Kornievskaia
2019-07-09 12:34 ` Anna Schumaker
2019-07-09 15:51 ` Olga Kornievskaia
2019-07-17 22:12 ` J. Bruce Fields
2019-07-17 22:15 ` J. Bruce Fields
2019-07-22 20:03 ` Olga Kornievskaia
2019-07-17 23:07 ` J. Bruce Fields [this message]
2019-07-22 20:17 ` Olga Kornievskaia
2019-07-23 20:45 ` J. Bruce Fields
2019-07-30 15:48 ` Olga Kornievskaia
2019-07-30 15:55 ` J. Bruce Fields
2019-07-30 16:13 ` Olga Kornievskaia
2019-07-30 17:10 ` Olga Kornievskaia
2019-07-08 19:23 ` [PATCH v4 5/8] NFSD check stateids against copy stateids Olga Kornievskaia
2019-07-19 22:01 ` J. Bruce Fields
2019-07-22 20:24 ` Olga Kornievskaia
2019-07-23 20:58 ` J. Bruce Fields
2019-07-30 16:03 ` Olga Kornievskaia
2019-07-31 21:10 ` Olga Kornievskaia
2019-07-31 21:51 ` J. Bruce Fields
2019-08-01 14:12 ` Olga Kornievskaia
2019-08-01 15:12 ` J. Bruce Fields
2019-08-01 15:41 ` Olga Kornievskaia
2019-08-01 18:06 ` Olga Kornievskaia
2019-08-01 18:11 ` J. Bruce Fields
2019-08-01 18:24 ` Olga Kornievskaia
2019-08-01 19:36 ` J. Bruce Fields
2019-08-07 16:02 ` Olga Kornievskaia
2019-08-07 16:08 ` J. Bruce Fields
2019-08-07 16:42 ` Olga Kornievskaia
2019-08-08 11:25 ` J. Bruce Fields
2019-07-08 19:23 ` [PATCH v4 6/8] NFSD generalize nfsd4_compound_state flag names Olga Kornievskaia
2019-07-08 19:23 ` [PATCH v4 7/8] NFSD: allow inter server COPY to have a STALE source server fh Olga Kornievskaia
2019-07-23 21:35 ` J. Bruce Fields
2019-07-30 15:48 ` Olga Kornievskaia
2019-07-08 19:23 ` [PATCH v4 8/8] NFSD add nfs4 inter ssc to nfsd4_copy Olga Kornievskaia
2019-07-09 12:43 ` Anna Schumaker
2019-07-09 15:53 ` Olga Kornievskaia
2019-07-09 3:53 ` [PATCH v4 0/8] server-side support for "inter" SSC copy J. Bruce Fields
2019-07-09 15:47 ` Olga Kornievskaia
2019-07-17 18:05 ` Olga Kornievskaia
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