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 v3 01/38] nfsd: Add reference counting to the lock and open stateids
Date: Tue, 29 Jul 2014 21:34:06 -0400 [thread overview]
Message-ID: <1406684083-19736-2-git-send-email-jlayton@primarydata.com> (raw)
In-Reply-To: <1406684083-19736-1-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>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
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 b0f83beeca75..3b0836db8553 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -890,8 +890,10 @@ 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_ol_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);
@@ -909,7 +911,7 @@ 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_ol_stateid(stp);
}
static void unhash_lockowner(struct nfs4_lockowner *lo)
@@ -972,7 +974,7 @@ 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_ol_stateid(stp);
}
static void unhash_openowner(struct nfs4_openowner *oo)
@@ -993,7 +995,7 @@ 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_ol_stateid(s);
oo->oo_last_closed_stid = NULL;
}
}
@@ -3818,7 +3820,7 @@ 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_ol_stateid(open->op_stp);
}
__be32
@@ -4477,9 +4479,9 @@ 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_ol_stateid(s);
} else {
if (s->st_file) {
put_nfs4_file(s->st_file);
--
1.9.3
next prev parent reply other threads:[~2014-07-30 1:34 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-30 1:34 [PATCH v3 00/38] nfsd: stateid and stateowner refcounting overhaul Jeff Layton
2014-07-30 1:34 ` Jeff Layton [this message]
2014-07-30 1:34 ` [PATCH v3 02/38] nfsd: Cleanup the freeing of stateids Jeff Layton
2014-07-30 20:57 ` Christoph Hellwig
2014-07-31 16:50 ` J. Bruce Fields
2014-07-30 1:34 ` [PATCH v3 03/38] nfsd: Add a struct nfs4_file field to struct nfs4_stid Jeff Layton
2014-07-30 1:34 ` [PATCH v3 04/38] nfsd: Replace nfs4_ol_stateid->st_file with the st_stid.sc_file Jeff Layton
2014-07-30 20:59 ` Christoph Hellwig
2014-07-31 16:52 ` J. Bruce Fields
2014-07-30 1:34 ` [PATCH v3 05/38] nfsd4: use cl_lock to synchronize all stateid idr calls Jeff Layton
2014-07-30 20:59 ` Christoph Hellwig
2014-07-30 1:34 ` [PATCH v3 06/38] nfsd: do filp_close in sc_free callback for lock stateids Jeff Layton
2014-07-30 21:08 ` Christoph Hellwig
2014-07-30 1:34 ` [PATCH v3 07/38] nfsd: Add locking to protect the state owner lists Jeff Layton
2014-07-30 1:34 ` [PATCH v3 08/38] nfsd: clean up races in lock stateid searching and creation Jeff Layton
2014-07-30 1:34 ` [PATCH v3 09/38] nfsd: ensure atomicity in nfsd4_free_stateid and nfsd4_validate_stateid Jeff Layton
2014-07-30 1:34 ` [PATCH v3 10/38] nfsd: Add reference counting to lock stateids Jeff Layton
2014-07-30 1:34 ` [PATCH v3 11/38] nfsd: nfsd4_locku() must reference the lock stateid Jeff Layton
2014-07-30 1:34 ` [PATCH v3 12/38] nfsd: Ensure that nfs4_open_delegation() references the delegation stateid Jeff Layton
2014-07-30 1:34 ` [PATCH v3 13/38] nfsd: nfsd4_process_open2() must reference " Jeff Layton
2014-07-30 1:34 ` [PATCH v3 14/38] nfsd: nfsd4_process_open2() must reference the open stateid Jeff Layton
2014-07-30 1:34 ` [PATCH v3 15/38] nfsd: Prepare nfsd4_close() for open stateid referencing Jeff Layton
2014-07-30 1:34 ` [PATCH v3 16/38] nfsd: nfsd4_open_confirm() must reference the open stateid Jeff Layton
2014-07-30 1:34 ` [PATCH v3 17/38] nfsd: Add reference counting to nfs4_preprocess_confirmed_seqid_op Jeff Layton
2014-07-30 1:34 ` [PATCH v3 18/38] nfsd: Migrate the stateid reference into nfs4_preprocess_seqid_op Jeff Layton
2014-07-30 1:34 ` [PATCH v3 19/38] nfsd: Migrate the stateid reference into nfs4_lookup_stateid() Jeff Layton
2014-07-30 1:34 ` [PATCH v3 20/38] nfsd: Migrate the stateid reference into nfs4_find_stateid_by_type() Jeff Layton
2014-07-31 20:04 ` J. Bruce Fields
2014-07-30 1:34 ` [PATCH v3 21/38] nfsd: Add reference counting to state owners Jeff Layton
2014-08-01 16:48 ` J. Bruce Fields
2014-08-01 16:52 ` Jeff Layton
2014-07-30 1:34 ` [PATCH v3 22/38] nfsd: Add a mutex to protect the NFSv4.0 open owner replay cache Jeff Layton
2014-07-30 1:34 ` [PATCH v3 23/38] nfsd: clean up lockowner refcounting when finding them Jeff Layton
2014-07-30 1:34 ` [PATCH v3 24/38] nfsd: add an operation for unhashing a stateowner Jeff Layton
2014-07-30 1:34 ` [PATCH v3 25/38] nfsd: Make lock stateid take a reference to the lockowner Jeff Layton
2014-07-30 1:34 ` [PATCH v3 26/38] nfsd: clean up refcounting for lockowners Jeff Layton
2014-07-30 1:34 ` [PATCH v3 27/38] nfsd: make openstateids hold references to their openowners Jeff Layton
2014-08-01 19:29 ` J. Bruce Fields
2014-07-30 1:34 ` [PATCH v3 28/38] nfsd: don't allow CLOSE to proceed until refcount on stateid drops Jeff Layton
2014-07-30 1:34 ` [PATCH v3 29/38] nfsd: Protect adding/removing open state owners using client_lock Jeff Layton
2014-07-30 1:34 ` [PATCH v3 30/38] nfsd: Protect adding/removing lock " Jeff Layton
2014-08-01 19:44 ` J. Bruce Fields
2014-07-30 1:34 ` [PATCH v3 31/38] nfsd: Move the open owner hash table into struct nfs4_client Jeff Layton
2014-08-02 10:39 ` Kinglong Mee
2014-08-02 13:11 ` Trond Myklebust
2014-08-02 13:23 ` Jeff Layton
2014-08-02 13:51 ` Kinglong Mee
2014-08-02 13:43 ` Kinglong Mee
2014-08-02 14:05 ` Trond Myklebust
2014-08-02 14:20 ` Kinglong Mee
2014-08-02 14:47 ` Trond Myklebust
2014-08-02 22:59 ` Jeff Layton
2014-08-03 1:59 ` Trond Myklebust
[not found] ` <CAPakX04ctGujqpJ48WqT1-r5=q0T8D1Ji=q1P5UTuwdw_hTsGg@mail.gmail.com>
2014-08-03 14:15 ` Kinglong Mee
2014-08-03 14:49 ` Jeff Layton
2014-08-05 18:46 ` Bruce Fields
2014-07-30 1:34 ` [PATCH v3 32/38] nfsd: clean up and reorganize release_lockowner Jeff Layton
2014-07-30 1:34 ` [PATCH v3 33/38] nfsd: add locking to stateowner release Jeff Layton
2014-07-30 1:34 ` [PATCH v3 34/38] nfsd: optimize destroy_lockowner cl_lock thrashing Jeff Layton
2014-07-30 1:34 ` [PATCH v3 35/38] nfsd: close potential race in nfsd4_free_stateid Jeff Layton
2014-07-30 1:34 ` [PATCH v3 36/38] nfsd: reduce cl_lock thrashing in release_openowner Jeff Layton
2014-07-30 1:34 ` [PATCH v3 37/38] nfsd: don't thrash the cl_lock while freeing an open stateid Jeff Layton
2014-07-30 1:34 ` [PATCH v3 38/38] nfsd: rename unhash_generic_stateid to unhash_ol_stateid Jeff Layton
2014-08-01 20:25 ` [PATCH v3 00/38] nfsd: stateid and stateowner refcounting overhaul J. Bruce Fields
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