From: Oleg Drokin <green@linuxhacker.ru>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
devel@driverdev.osuosl.org,
Andreas Dilger <andreas.dilger@intel.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Lustre Development List <lustre-devel@lists.lustre.org>,
Oleg Drokin <oleg.drokin@intel.com>,
Oleg Drokin <green@linuxhacker.ru>
Subject: [PATCH 23/28] staging/lustre/llite: Restore proper opencache operations
Date: Sun, 19 Jun 2016 22:07:38 -0400 [thread overview]
Message-ID: <1466388463-1817551-24-git-send-email-green@linuxhacker.ru> (raw)
In-Reply-To: <1466388463-1817551-1-git-send-email-green@linuxhacker.ru>
From: Oleg Drokin <oleg.drokin@intel.com>
Mark dentries that came to us via NFS in a special way so that
we can tell them apart during open and activate open cache
(we really don't want to do open/close RPC for every NFS IO).
This became needed since dentry revlidate no longer reimplements
any RPCs for lookup, and as such if a dentry is valid,
ll_revalidate_dentry returns 1 and ll_lookup_it() is never visited
during opens, we get straght into ll_file_open() without a valid
intent/RPC. This used to be only true for NFS, so opencache was
engaged needlessly, and it carries a cost of it's own if there is
in fact no repetitive file opening-closing going on
Signed-off-by: Oleg Drokin <oleg.drokin@intel.com>
Reviewed-on: http://review.whamcloud.com/20354
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-8019
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Li Xi <lixi@ddn.com>
Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
drivers/staging/lustre/lustre/llite/file.c | 14 +++++++++++++-
drivers/staging/lustre/lustre/llite/llite_internal.h | 1 +
drivers/staging/lustre/lustre/llite/llite_nfs.c | 18 ++++++++++++++++++
3 files changed, 32 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/lustre/lustre/llite/file.c b/drivers/staging/lustre/lustre/llite/file.c
index a188366..6a5e8c7 100644
--- a/drivers/staging/lustre/lustre/llite/file.c
+++ b/drivers/staging/lustre/lustre/llite/file.c
@@ -411,7 +411,19 @@ static int ll_intent_file_open(struct dentry *dentry, void *lmm,
* parameters. No need for the open lock
*/
if (!lmm && lmmsize == 0) {
- itp->it_flags |= MDS_OPEN_LOCK;
+ struct ll_dentry_data *ldd = ll_d2d(dentry);
+ /*
+ * If we came via ll_iget_for_nfs, then we need to request
+ * struct ll_dentry_data *ldd = ll_d2d(file->f_dentry);
+ *
+ * NB: when ldd is NULL, it must have come via normal
+ * lookup path only, since ll_iget_for_nfs always calls
+ * ll_d_init().
+ */
+ if (ldd && ldd->lld_nfs_dentry) {
+ ldd->lld_nfs_dentry = 0;
+ itp->it_flags |= MDS_OPEN_LOCK;
+ }
if (itp->it_flags & FMODE_WRITE)
opc = LUSTRE_OPC_CREATE;
}
diff --git a/drivers/staging/lustre/lustre/llite/llite_internal.h b/drivers/staging/lustre/lustre/llite/llite_internal.h
index 3692102..1d4e91e 100644
--- a/drivers/staging/lustre/lustre/llite/llite_internal.h
+++ b/drivers/staging/lustre/lustre/llite/llite_internal.h
@@ -64,6 +64,7 @@ struct ll_dentry_data {
struct lookup_intent *lld_it;
unsigned int lld_sa_generation;
unsigned int lld_invalid:1;
+ unsigned int lld_nfs_dentry:1;
struct rcu_head lld_rcu_head;
};
diff --git a/drivers/staging/lustre/lustre/llite/llite_nfs.c b/drivers/staging/lustre/lustre/llite/llite_nfs.c
index d7878e5..65972c8 100644
--- a/drivers/staging/lustre/lustre/llite/llite_nfs.c
+++ b/drivers/staging/lustre/lustre/llite/llite_nfs.c
@@ -168,6 +168,24 @@ ll_iget_for_nfs(struct super_block *sb, struct lu_fid *fid, struct lu_fid *paren
/* N.B. d_obtain_alias() drops inode ref on error */
result = d_obtain_alias(inode);
+ if (!IS_ERR(result)) {
+ int rc;
+
+ rc = ll_d_init(result);
+ if (rc < 0) {
+ dput(result);
+ result = ERR_PTR(rc);
+ } else {
+ struct ll_dentry_data *ldd = ll_d2d(result);
+
+ /*
+ * Need to signal to the ll_intent_file_open that
+ * we came from NFS and so opencache needs to be
+ * enabled for this one
+ */
+ ldd->lld_nfs_dentry = 1;
+ }
+ }
return result;
}
--
2.7.4
next prev parent reply other threads:[~2016-06-20 2:14 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-20 2:07 [PATCH 00/28] Lustre fixes Oleg Drokin
2016-06-20 2:07 ` [PATCH 01/28] staging/lustre/llite: allocate and free client cache asynchronously Oleg Drokin
2016-06-20 2:07 ` [PATCH 02/28] staging/lustre/llite: correct request handling after ll_lookup_it() Oleg Drokin
2016-06-20 2:07 ` [PATCH 03/28] staging/lustre/llite: Get rid of ll_lock_dcache/ll_unlock_dcache Oleg Drokin
2016-06-20 2:07 ` [PATCH 04/28] staging/lustre/llite: lock i_lock before __d_drop() Oleg Drokin
2016-06-20 2:07 ` [PATCH 05/28] staging/lustre/osc: osc_lock_weight endless loop fix Oleg Drokin
2016-06-20 2:07 ` [PATCH 06/28] staging/lustre/osc: Fix reverted condition in osc_lock_weight Oleg Drokin
2016-06-20 2:07 ` [PATCH 07/28] staging/lustre/ptlrpc: reorganize ptlrpc_request Oleg Drokin
2016-06-20 2:07 ` [PATCH 08/28] staging/lustre/ptlrpc: missing wakeup for ptlrpc_check_set Oleg Drokin
2016-06-20 2:07 ` [PATCH 09/28] staging/lustre/ptlrpc: Early Reply vs Reply MDunlink Oleg Drokin
2016-06-20 2:07 ` [PATCH 10/28] staging/lustre/ptlrpc: Remove __ptlrpc_request_bufs_pack Oleg Drokin
2016-06-20 2:07 ` [PATCH 11/28] staging/lustre/ptlrpc: lost bulk leads to a hang Oleg Drokin
2016-06-20 2:07 ` [PATCH 12/28] staging/lustre/llite: take trunc_sem only at vvp layer Oleg Drokin
2016-06-20 2:07 ` [PATCH 13/28] staging/lustre: LDLM_DEBUG() shouldn't be passed \n Oleg Drokin
2016-06-20 2:07 ` [PATCH 14/28] staging/lustre: Add newline to LU_OBJECT_DEBUG() message Oleg Drokin
2016-06-20 2:07 ` [PATCH 15/28] staging/lustre/llite: flatten struct lookup_intent Oleg Drokin
2016-06-20 2:07 ` [PATCH 16/28] staging/lustre: Inline Lustre intent disposition functions Oleg Drokin
2016-06-20 2:07 ` [PATCH 17/28] staging/lustre/llite: change it_data to it_request Oleg Drokin
2016-06-20 2:07 ` [PATCH 18/28] staging/lustre/ldlm: const qualify struct lustre_handle * params Oleg Drokin
2016-06-20 2:07 ` [PATCH 19/28] staging/lustre/llite: ensure obd is effective in onu_upcall Oleg Drokin
2016-06-20 2:07 ` [PATCH 20/28] staging/lustre/mdc: Zero atime in close RPC Oleg Drokin
2016-06-20 2:07 ` [PATCH 21/28] staging/lustre/o2ib: Don't access NULL NI on failure path Oleg Drokin
2016-06-20 2:07 ` [PATCH 22/28] staging/lustre/llite: don't panic when fid is insane Oleg Drokin
2016-06-20 2:07 ` Oleg Drokin [this message]
2016-06-20 2:07 ` [PATCH 24/28] staging/lustre/llite: ll_revalidate_dentry update Oleg Drokin
2016-06-20 2:07 ` [PATCH 25/28] staging/lustre/llite: IOC_MDC_GETFILEINFO returns the wrong ino Oleg Drokin
2016-06-20 2:07 ` [PATCH 26/28] staging/lustre/osc: fix signed one bit field Oleg Drokin
2016-06-20 2:07 ` [PATCH 27/28] staging/lustre: Add documentation for unstable_stats in sysfs Oleg Drokin
2016-06-20 2:07 ` [PATCH 28/28] staging/lustre/osc: glimpse lock should match only with granted locks Oleg Drokin
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