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From: Boaz Harrosh <bharrosh@panasas.com>
To: Benny Halevy <bhalevy@panasas.com>,
	Trond Myklebust <Trond.Myklebust@netapp.com>,
	NFS list <linux-nfs@vger.kernel.org>
Subject: [PATCH 01/12] NFSv4.1: use layout driver in global device cache
Date: Tue, 24 May 2011 18:04:02 +0300	[thread overview]
Message-ID: <1306249442-23180-1-git-send-email-bharrosh@panasas.com> (raw)
In-Reply-To: <4DDBC611.3050202@panasas.com>

pnfs deviceids are unique per server, per layout type.
struct nfs_client is currently used to distinguish deviceids from
different nfs servers, yet these may clash between different layout
types on the same server.  Therefore, use the layout driver associated
with each deviceid at insertion time to look it up, unhash, or
delete it.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
---
 fs/nfs/callback_proc.c  |    2 +-
 fs/nfs/nfs4filelayout.c |    3 ++-
 fs/nfs/pnfs.h           |    6 +++---
 fs/nfs/pnfs_dev.c       |   28 +++++++++++++++++-----------
 4 files changed, 23 insertions(+), 16 deletions(-)

diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c
index fb5e5b9..c73e7b2 100644
--- a/fs/nfs/callback_proc.c
+++ b/fs/nfs/callback_proc.c
@@ -278,7 +278,7 @@ __be32 nfs4_callback_devicenotify(struct cb_devicenotifyargs *args,
 		if (dev->cbd_notify_type == NOTIFY_DEVICEID4_CHANGE)
 			dprintk("%s: NOTIFY_DEVICEID4_CHANGE not supported, "
 				"deleting instead\n", __func__);
-		nfs4_delete_deviceid(clp, &dev->cbd_dev_id);
+		nfs4_delete_deviceid(server->pnfs_curr_ld, clp, &dev->cbd_dev_id);
 	}
 
 out:
diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c
index c181a8b..45866d0 100644
--- a/fs/nfs/nfs4filelayout.c
+++ b/fs/nfs/nfs4filelayout.c
@@ -441,7 +441,8 @@ filelayout_check_layout(struct pnfs_layout_hdr *lo,
 	}
 
 	/* find and reference the deviceid */
-	d = nfs4_find_get_deviceid(NFS_SERVER(lo->plh_inode)->nfs_client, id);
+	d = nfs4_find_get_deviceid(NFS_SERVER(lo->plh_inode)->pnfs_curr_ld,
+				   NFS_SERVER(lo->plh_inode)->nfs_client, id);
 	if (d == NULL) {
 		dsaddr = get_device_info(lo->plh_inode, id, gfp_flags);
 		if (dsaddr == NULL)
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 7f29e3a..b7f88d4 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -171,9 +171,9 @@ struct nfs4_deviceid_node {
 };
 
 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id);
-struct nfs4_deviceid_node *nfs4_find_get_deviceid(const struct nfs_client *, const struct nfs4_deviceid *);
-struct nfs4_deviceid_node *nfs4_unhash_put_deviceid(const struct nfs_client *, const struct nfs4_deviceid *);
-void nfs4_delete_deviceid(const struct nfs_client *, const struct nfs4_deviceid *);
+struct nfs4_deviceid_node *nfs4_find_get_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
+struct nfs4_deviceid_node *nfs4_unhash_put_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
+void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *,
 			     const struct pnfs_layoutdriver_type *,
 			     const struct nfs_client *,
diff --git a/fs/nfs/pnfs_dev.c b/fs/nfs/pnfs_dev.c
index f830616..7997899 100644
--- a/fs/nfs/pnfs_dev.c
+++ b/fs/nfs/pnfs_dev.c
@@ -67,14 +67,16 @@ nfs4_deviceid_hash(const struct nfs4_deviceid *id)
 }
 
 static struct nfs4_deviceid_node *
-_lookup_deviceid(const struct nfs_client *clp, const struct nfs4_deviceid *id,
+_lookup_deviceid(const struct pnfs_layoutdriver_type *ld,
+		 const struct nfs_client *clp, const struct nfs4_deviceid *id,
 		 long hash)
 {
 	struct nfs4_deviceid_node *d;
 	struct hlist_node *n;
 
 	hlist_for_each_entry_rcu(d, n, &nfs4_deviceid_cache[hash], node)
-		if (d->nfs_client == clp && !memcmp(&d->deviceid, id, sizeof(*id))) {
+		if (d->ld == ld && d->nfs_client == clp &&
+		    !memcmp(&d->deviceid, id, sizeof(*id))) {
 			if (atomic_read(&d->ref))
 				return d;
 			else
@@ -90,13 +92,14 @@ _lookup_deviceid(const struct nfs_client *clp, const struct nfs4_deviceid *id,
  * @id deviceid to look up
  */
 struct nfs4_deviceid_node *
-_find_get_deviceid(const struct nfs_client *clp, const struct nfs4_deviceid *id,
+_find_get_deviceid(const struct pnfs_layoutdriver_type *ld,
+		   const struct nfs_client *clp, const struct nfs4_deviceid *id,
 		   long hash)
 {
 	struct nfs4_deviceid_node *d;
 
 	rcu_read_lock();
-	d = _lookup_deviceid(clp, id, hash);
+	d = _lookup_deviceid(ld, clp, id, hash);
 	if (!atomic_inc_not_zero(&d->ref))
 		d = NULL;
 	rcu_read_unlock();
@@ -104,9 +107,10 @@ _find_get_deviceid(const struct nfs_client *clp, const struct nfs4_deviceid *id,
 }
 
 struct nfs4_deviceid_node *
-nfs4_find_get_deviceid(const struct nfs_client *clp, const struct nfs4_deviceid *id)
+nfs4_find_get_deviceid(const struct pnfs_layoutdriver_type *ld,
+		       const struct nfs_client *clp, const struct nfs4_deviceid *id)
 {
-	return _find_get_deviceid(clp, id, nfs4_deviceid_hash(id));
+	return _find_get_deviceid(ld, clp, id, nfs4_deviceid_hash(id));
 }
 EXPORT_SYMBOL_GPL(nfs4_find_get_deviceid);
 
@@ -119,13 +123,14 @@ EXPORT_SYMBOL_GPL(nfs4_find_get_deviceid);
  * @ret the unhashed node, if found and dereferenced to zero, NULL otherwise.
  */
 struct nfs4_deviceid_node *
-nfs4_unhash_put_deviceid(const struct nfs_client *clp, const struct nfs4_deviceid *id)
+nfs4_unhash_put_deviceid(const struct pnfs_layoutdriver_type *ld,
+			 const struct nfs_client *clp, const struct nfs4_deviceid *id)
 {
 	struct nfs4_deviceid_node *d;
 
 	spin_lock(&nfs4_deviceid_lock);
 	rcu_read_lock();
-	d = _lookup_deviceid(clp, id, nfs4_deviceid_hash(id));
+	d = _lookup_deviceid(ld, clp, id, nfs4_deviceid_hash(id));
 	rcu_read_unlock();
 	if (!d) {
 		spin_unlock(&nfs4_deviceid_lock);
@@ -150,11 +155,12 @@ EXPORT_SYMBOL_GPL(nfs4_unhash_put_deviceid);
  * @id deviceid to delete
  */
 void
-nfs4_delete_deviceid(const struct nfs_client *clp, const struct nfs4_deviceid *id)
+nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *ld,
+		     const struct nfs_client *clp, const struct nfs4_deviceid *id)
 {
 	struct nfs4_deviceid_node *d;
 
-	d = nfs4_unhash_put_deviceid(clp, id);
+	d = nfs4_unhash_put_deviceid(ld, clp, id);
 	if (!d)
 		return;
 	if (d->ld->free_deviceid_node)
@@ -197,7 +203,7 @@ nfs4_insert_deviceid_node(struct nfs4_deviceid_node *new)
 
 	spin_lock(&nfs4_deviceid_lock);
 	hash = nfs4_deviceid_hash(&new->deviceid);
-	d = _find_get_deviceid(new->nfs_client, &new->deviceid, hash);
+	d = _find_get_deviceid(new->ld, new->nfs_client, &new->deviceid, hash);
 	if (d) {
 		spin_unlock(&nfs4_deviceid_lock);
 		return d;
-- 
1.7.2.3


  reply	other threads:[~2011-05-24 15:04 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-05-24 14:52 [PATCHES 00/12] Mostly a Resend of ALL Bug fixes and SQUASHMEs - pnfs-submit 2.6.40 V7 Boaz Harrosh
2011-05-24 15:04 ` Boaz Harrosh [this message]
2011-05-24 15:04 ` [PATCH 02/12] SQUASHME: Bug in new global-device-cache code Boaz Harrosh
2011-05-24 16:52   ` Benny Halevy
2011-05-24 17:00     ` Boaz Harrosh
2011-05-24 17:02       ` Benny Halevy
2011-05-24 15:05 ` [PATCH 03/12] SQUSHME: pnfs: BUG in _deviceid_purge_client Boaz Harrosh
2011-05-24 16:57   ` Benny Halevy
2011-05-24 15:05 ` [PATCH 04/12] pnfs: layout_driver MUST set free_deviceid_node if using dev-cache Boaz Harrosh
2011-05-24 17:04   ` Benny Halevy
2011-05-24 15:06 ` [PATCH 05/12] SQUASHME: pnfs-obj: pnfs_osd_xdr.h Remove server definitions Boaz Harrosh
2011-05-24 15:06 ` [PATCH 06/12] SQUASHME: pnf-obj xdr_cli: Wrong type in comments Boaz Harrosh
2011-05-24 15:06 ` [PATCH 07/12] SQUASHME: pnfs-obj: use layout driver in global device cache Boaz Harrosh
2011-05-24 15:06 ` [PATCH 08/12] SQUASHME: objio alloc/free lseg Bugs fixes Boaz Harrosh
2011-05-24 17:06   ` Benny Halevy
2011-05-24 15:07 ` [PATCH 09/12] SQUASHME: pnfs-obj: Bugs in new global-device-cache code Boaz Harrosh
2011-05-24 17:14   ` Benny Halevy
2011-05-24 17:18     ` Boaz Harrosh
2011-05-24 15:08 ` [PATCH 10/12] SQUASHME: pnfs-obj: objlayout wants to cache devices until unmount Boaz Harrosh
2011-05-24 17:17   ` Benny Halevy
2011-05-24 15:08 ` [PATCH 11/12] SQUASHME: pnfs: Fall out from: non-rpc layout drivers Boaz Harrosh
2011-05-24 15:10 ` [PATCH 12/12] SQUASHME: objio read/write patch: Bugs fixes Boaz Harrosh

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