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From: Trond Myklebust <trondmy@gmail.com>
To: SteveD@redhat.com
Cc: linux-nfs@vger.kernel.org
Subject: [PATCH v3 01/11] mountd: Ensure we don't share cache file descriptors among processes.
Date: Tue, 28 May 2019 16:31:12 -0400	[thread overview]
Message-ID: <20190528203122.11401-2-trond.myklebust@hammerspace.com> (raw)
In-Reply-To: <20190528203122.11401-1-trond.myklebust@hammerspace.com>

Sharing cache descriptors without using locking can be very bad.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
 utils/mountd/mountd.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/utils/mountd/mountd.c b/utils/mountd/mountd.c
index fb7bba4cd390..88a207b3a85a 100644
--- a/utils/mountd/mountd.c
+++ b/utils/mountd/mountd.c
@@ -836,8 +836,6 @@ main(int argc, char **argv)
 	if (!foreground)
 		closeall(3);
 
-	cache_open();
-
 	unregister_services();
 	if (version2()) {
 		listeners += nfs_svc_create("mountd", MOUNTPROG,
@@ -888,6 +886,9 @@ main(int argc, char **argv)
 	if (num_threads > 1)
 		fork_workers();
 
+	/* Open files now to avoid sharing descriptors among forked processes */
+	cache_open();
+
 	xlog(L_NOTICE, "Version " VERSION " starting");
 	my_svc_run();
 
-- 
2.21.0


  reply	other threads:[~2019-05-28 20:33 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-28 20:31 [PATCH v3 00/11] Add the "[exports] rootdir" option to nfs.conf Trond Myklebust
2019-05-28 20:31 ` Trond Myklebust [this message]
2019-05-28 20:31   ` [PATCH v3 02/11] Add a simple workqueue mechanism Trond Myklebust
2019-05-28 20:31     ` [PATCH v3 03/11] Allow callers to check mountpoint status using a custom lstat function Trond Myklebust
2019-05-28 20:31       ` [PATCH v3 04/11] Add utilities for resolving nfsd paths and stat()ing them Trond Myklebust
2019-05-28 20:31         ` [PATCH v3 05/11] Use xstat() with no synchronisation if available Trond Myklebust
2019-05-28 20:31           ` [PATCH v3 06/11] Add helpers to read/write to a file through the chrooted thread Trond Myklebust
2019-05-28 20:31             ` [PATCH v3 07/11] Add a helper to return the real path given an export entry Trond Myklebust
2019-05-28 20:31               ` [PATCH v3 08/11] Add support for the "[exports] rootdir" nfs.conf option to rpc.mountd Trond Myklebust
2019-05-28 20:31                 ` [PATCH v3 09/11] Add support for the "[exports] rootdir" nfs.conf option to exportfs Trond Myklebust
2019-05-28 20:31                   ` [PATCH v3 10/11] Add a helper for resolving symlinked nfsd paths via realpath() Trond Myklebust
2019-05-28 20:31                     ` [PATCH v3 11/11] Fix up symlinked mount path resolution when "[exports] rootdir" is set Trond Myklebust
2019-05-31 16:02                 ` [PATCH v3 08/11] Add support for the "[exports] rootdir" nfs.conf option to rpc.mountd J. Bruce Fields
2019-06-03 14:18                   ` Steve Dickson
2019-06-03 16:30                     ` Trond Myklebust
2019-05-29 14:38               ` [PATCH v3 07/11] Add a helper to return the real path given an export entry Steve Dickson
2019-05-29 14:55                 ` Trond Myklebust
2019-05-29 16:03                   ` Steve Dickson
2019-05-29 16:12                     ` Trond Myklebust
2019-05-29 17:17                       ` Steve Dickson
2019-05-31 15:52         ` [PATCH v3 04/11] Add utilities for resolving nfsd paths and stat()ing them J. Bruce Fields
2019-06-03 14:21           ` Steve Dickson
2019-06-03 16:32             ` Trond Myklebust
2019-06-10 13:53 ` [PATCH v3 00/11] Add the "[exports] rootdir" option to nfs.conf Steve Dickson

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