From: Jeff Layton <jlayton@primarydata.com>
To: bfields@fieldses.org
Cc: linux-nfs@vger.kernel.org, hch@infradead.org,
Trond Myklebust <trond.myklebust@primarydata.com>
Subject: [PATCH 02/40] nfsd: Add reference counting to the lock and open stateids
Date: Mon, 21 Jul 2014 11:02:14 -0400 [thread overview]
Message-ID: <1405954972-28904-3-git-send-email-jlayton@primarydata.com> (raw)
In-Reply-To: <1405954972-28904-1-git-send-email-jlayton@primarydata.com>
From: Trond Myklebust <trond.myklebust@primarydata.com>
When we remove the client_mutex, we'll need to be able to ensure that
these objects aren't destroyed while we're not holding locks.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
fs/nfsd/nfs4state.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 3e55df0d7504..76d28be3ef41 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -883,8 +883,10 @@ static void close_generic_stateid(struct nfs4_ol_stateid *stp)
release_all_access(stp);
}
-static void free_generic_stateid(struct nfs4_ol_stateid *stp)
+static void put_generic_stateid(struct nfs4_ol_stateid *stp)
{
+ if (!atomic_dec_and_test(&stp->st_stid.sc_count))
+ return;
if (stp->st_file)
put_nfs4_file(stp->st_file);
remove_stid(&stp->st_stid);
@@ -902,7 +904,7 @@ static void __release_lock_stateid(struct nfs4_ol_stateid *stp)
if (file)
filp_close(file, (fl_owner_t)lockowner(stp->st_stateowner));
close_generic_stateid(stp);
- free_generic_stateid(stp);
+ put_generic_stateid(stp);
}
static void unhash_lockowner(struct nfs4_lockowner *lo)
@@ -965,7 +967,7 @@ static void unhash_open_stateid(struct nfs4_ol_stateid *stp)
static void release_open_stateid(struct nfs4_ol_stateid *stp)
{
unhash_open_stateid(stp);
- free_generic_stateid(stp);
+ put_generic_stateid(stp);
}
static void unhash_openowner(struct nfs4_openowner *oo)
@@ -986,7 +988,7 @@ static void release_last_closed_stateid(struct nfs4_openowner *oo)
struct nfs4_ol_stateid *s = oo->oo_last_closed_stid;
if (s) {
- free_generic_stateid(s);
+ put_generic_stateid(s);
oo->oo_last_closed_stid = NULL;
}
}
@@ -3823,7 +3825,7 @@ void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status)
if (open->op_file)
nfsd4_free_file(open->op_file);
if (open->op_stp)
- free_generic_stateid(open->op_stp);
+ put_generic_stateid(open->op_stp);
}
__be32
@@ -4482,9 +4484,9 @@ static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s)
unhash_open_stateid(s);
if (clp->cl_minorversion) {
- free_generic_stateid(s);
if (list_empty(&oo->oo_owner.so_stateids))
release_openowner(oo);
+ put_generic_stateid(s);
} else {
if (s->st_file) {
put_nfs4_file(s->st_file);
--
1.9.3
next prev parent reply other threads:[~2014-07-21 15:03 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-21 15:02 [PATCH 00/40] nfsd: stateid and stateowner refcounting overhaul Jeff Layton
2014-07-21 15:02 ` [PATCH 01/40] nfsd4: use cl_lock to synchronize all stateid idr calls Jeff Layton
2014-07-27 13:21 ` Christoph Hellwig
2014-07-21 15:02 ` Jeff Layton [this message]
2014-07-27 13:23 ` [PATCH 02/40] nfsd: Add reference counting to the lock and open stateids Christoph Hellwig
2014-07-21 15:02 ` [PATCH 03/40] nfsd: Add a struct nfs4_file field to struct nfs4_stid Jeff Layton
2014-07-27 13:24 ` Christoph Hellwig
2014-07-21 15:02 ` [PATCH 04/40] nfsd: Replace nfs4_ol_stateid->st_file with the st_stid.sc_file Jeff Layton
2014-07-27 13:25 ` Christoph Hellwig
2014-07-21 15:02 ` [PATCH 05/40] nfsd: Ensure atomicity of stateid destruction and idr tree removal Jeff Layton
2014-07-27 13:28 ` Christoph Hellwig
2014-07-21 15:02 ` [PATCH 06/40] nfsd: Cleanup the freeing of stateids Jeff Layton
2014-07-27 13:35 ` Christoph Hellwig
2014-07-21 15:02 ` [PATCH 07/40] nfsd: do filp_close in sc_free callback for lock stateids Jeff Layton
2014-07-27 13:37 ` Christoph Hellwig
2014-07-21 15:02 ` [PATCH 08/40] nfsd: Add locking to protect the state owner lists Jeff Layton
2014-07-27 13:42 ` Christoph Hellwig
2014-07-29 11:42 ` Jeff Layton
2014-07-21 15:02 ` [PATCH 09/40] nfsd: clean up races in lock stateid searching and creation Jeff Layton
2014-07-27 13:44 ` Christoph Hellwig
2014-07-21 15:02 ` [PATCH 10/40] nfsd: Slight cleanup of find_stateid() Jeff Layton
2014-07-27 13:38 ` Christoph Hellwig
2014-07-21 15:02 ` [PATCH 11/40] nfsd: ensure atomicity in nfsd4_free_stateid and nfsd4_validate_stateid Jeff Layton
2014-07-27 13:46 ` Christoph Hellwig
2014-07-21 15:02 ` [PATCH 12/40] nfsd: Add reference counting to lock stateids Jeff Layton
2014-07-21 15:02 ` [PATCH 13/40] nfsd: nfsd4_locku() must reference the lock stateid Jeff Layton
2014-07-21 15:02 ` [PATCH 14/40] nfsd: Ensure that nfs4_open_delegation() references the delegation stateid Jeff Layton
2014-07-21 15:02 ` [PATCH 15/40] nfsd: nfsd4_process_open2() must reference " Jeff Layton
2014-07-21 15:02 ` [PATCH 16/40] nfsd: nfsd4_process_open2() must reference the open stateid Jeff Layton
2014-07-21 15:02 ` [PATCH 17/40] nfsd: Prepare nfsd4_close() for open stateid referencing Jeff Layton
2014-07-21 15:02 ` [PATCH 18/40] nfsd: nfsd4_open_confirm() must reference the open stateid Jeff Layton
2014-07-21 15:02 ` [PATCH 19/40] nfsd: Add reference counting to nfs4_preprocess_confirmed_seqid_op Jeff Layton
2014-07-21 15:02 ` [PATCH 20/40] nfsd: Migrate the stateid reference into nfs4_preprocess_seqid_op Jeff Layton
2014-07-21 15:02 ` [PATCH 21/40] nfsd: Migrate the stateid reference into nfs4_lookup_stateid() Jeff Layton
2014-07-21 15:02 ` [PATCH 22/40] nfsd: Migrate the stateid reference into nfs4_find_stateid_by_type() Jeff Layton
2014-07-21 15:02 ` [PATCH 23/40] nfsd: Add reference counting to state owners Jeff Layton
2014-07-27 13:58 ` Christoph Hellwig
2014-07-21 15:02 ` [PATCH 24/40] nfsd: Add a mutex to protect the NFSv4.0 open owner replay cache Jeff Layton
2014-07-21 15:02 ` [PATCH 25/40] nfsd: Keep a reference to the open stateid for the NFSv4.0 " Jeff Layton
2014-07-27 13:59 ` Christoph Hellwig
2014-07-21 15:02 ` [PATCH 26/40] nfsd: clean up lockowner refcounting when finding them Jeff Layton
2014-07-21 15:02 ` [PATCH 27/40] nfsd: add an operation for unhashing a stateowner Jeff Layton
2014-07-21 15:02 ` [PATCH 28/40] nfsd: Make lock stateid take a reference to the lockowner Jeff Layton
2014-07-21 15:02 ` [PATCH 29/40] nfsd: clean up refcounting for lockowners Jeff Layton
2014-07-21 15:02 ` [PATCH 30/40] nfsd: make openstateids hold references to their openowners Jeff Layton
2014-07-21 15:02 ` [PATCH 31/40] nfsd: don't allow CLOSE to proceed until refcount on stateid drops Jeff Layton
2014-07-21 15:02 ` [PATCH 32/40] nfsd: Protect adding/removing open state owners using client_lock Jeff Layton
2014-07-21 15:02 ` [PATCH 33/40] nfsd: Protect adding/removing lock " Jeff Layton
2014-07-21 15:02 ` [PATCH 34/40] nfsd: Move the open owner hash table into struct nfs4_client Jeff Layton
2014-07-21 15:02 ` [PATCH 35/40] nfsd: clean up and reorganize release_lockowner Jeff Layton
2014-07-21 15:02 ` [PATCH 36/40] nfsd: add locking to stateowner release Jeff Layton
2014-07-21 15:02 ` [PATCH 37/40] nfsd: optimize destroy_lockowner cl_lock thrashing Jeff Layton
2014-07-21 15:02 ` [PATCH 38/40] nfsd: close potential race in nfsd4_free_stateid Jeff Layton
2014-07-21 15:02 ` [PATCH 39/40] nfsd: reduce cl_lock thrashing in release_openowner Jeff Layton
2014-07-21 15:02 ` [PATCH 40/40] nfsd: don't thrash the cl_lock while freeing an open stateid Jeff Layton
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