From: NeilBrown <neilb@suse.com>
To: Trond Myklebust <trond.myklebust@primarydata.com>,
Anna Schumaker <anna.schumaker@netapp.com>,
Jeff Layton <jlayton@redhat.com>
Cc: Benjamin Coddington <bcodding@redhat.com>,
Linux NFS Mailing List <linux-nfs@vger.kernel.org>
Subject: [PATCH 1/6] NFS: remove l_pid field from nfs_lockowner
Date: Thu, 13 Oct 2016 15:26:47 +1100 [thread overview]
Message-ID: <147633280732.766.6320763479821613141.stgit@noble> (raw)
In-Reply-To: <147633263771.766.17853370901003798934.stgit@noble>
this field is not used in any important way and probably should
have been removed by
Commit: 8003d3c4aaa5 ("nfs4: treat lock owners as opaque values")
which removed the pid argument from nfs4_get_lock_state.
Except in unusual and uninteresting cases, two threads with the same
->tgid will have the same ->files pointer, so keeping them both
for comparison brings no benefit.
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.com>
---
fs/nfs/inode.c | 3 ---
fs/nfs/nfs4proc.c | 1 -
fs/nfs/pagelist.c | 3 +--
fs/nfs/write.c | 3 +--
include/linux/nfs_fs.h | 1 -
5 files changed, 2 insertions(+), 9 deletions(-)
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index bf4ec5ecc97e..1752fc7c0024 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -703,7 +703,6 @@ static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
{
atomic_set(&l_ctx->count, 1);
l_ctx->lockowner.l_owner = current->files;
- l_ctx->lockowner.l_pid = current->tgid;
INIT_LIST_HEAD(&l_ctx->list);
atomic_set(&l_ctx->io_count, 0);
}
@@ -716,8 +715,6 @@ static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context
do {
if (pos->lockowner.l_owner != current->files)
continue;
- if (pos->lockowner.l_pid != current->tgid)
- continue;
atomic_inc(&pos->count);
return pos;
} while ((pos = list_entry(pos->list.next, typeof(*pos), list)) != head);
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index ad917bd72b38..3c164f9a3983 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2928,7 +2928,6 @@ static int _nfs4_do_setattr(struct inode *inode,
} else if (truncate && state != NULL) {
struct nfs_lockowner lockowner = {
.l_owner = current->files,
- .l_pid = current->tgid,
};
if (!nfs4_valid_open_stateid(state))
return -EBADF;
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 965db474f4b0..161f8b13bbaa 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -867,8 +867,7 @@ static void nfs_pageio_cleanup_mirroring(struct nfs_pageio_descriptor *pgio)
static bool nfs_match_lock_context(const struct nfs_lock_context *l1,
const struct nfs_lock_context *l2)
{
- return l1->lockowner.l_owner == l2->lockowner.l_owner
- && l1->lockowner.l_pid == l2->lockowner.l_pid;
+ return l1->lockowner.l_owner == l2->lockowner.l_owner;
}
/**
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 53211838f72a..4d5897e6d6cb 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1151,8 +1151,7 @@ int nfs_flush_incompatible(struct file *file, struct page *page)
if (l_ctx && flctx &&
!(list_empty_careful(&flctx->flc_posix) &&
list_empty_careful(&flctx->flc_flock))) {
- do_flush |= l_ctx->lockowner.l_owner != current->files
- || l_ctx->lockowner.l_pid != current->tgid;
+ do_flush |= l_ctx->lockowner.l_owner != current->files;
}
nfs_release_request(req);
if (!do_flush)
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 810124b33327..bf8a713c45b4 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -57,7 +57,6 @@ struct nfs_access_entry {
struct nfs_lockowner {
fl_owner_t l_owner;
- pid_t l_pid;
};
struct nfs_lock_context {
next prev parent reply other threads:[~2016-10-13 4:26 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-13 4:26 [PATCH 0/6] NFSv4: Fix stateid used when flock locks in use. - V2 NeilBrown
2016-10-13 4:26 ` [PATCH 6/6] NFS: discard nfs_lockowner structure NeilBrown
2016-10-13 4:26 ` [PATCH 3/6] NFSv4: change nfs4_do_setattr to take an open_context instead of a nfs4_state NeilBrown
2016-11-02 15:49 ` Benjamin Coddington
2016-11-02 23:34 ` NeilBrown
2016-11-03 16:38 ` Benjamin Coddington
2016-11-03 23:12 ` Benjamin Coddington
2016-10-13 4:26 ` [PATCH 2/6] NFSv4: add flock_owner to open context NeilBrown
2016-10-13 4:26 ` [PATCH 4/6] NFSv4: change nfs4_select_rw_stateid to take a lock_context inplace of lock_owner NeilBrown
2016-10-20 0:57 ` NeilBrown
2016-10-13 4:26 ` NeilBrown [this message]
2016-10-13 4:26 ` [PATCH 5/6] NFSv4: enhance nfs4_copy_lock_stateid to use a flock stateid if there is one NeilBrown
2016-10-13 15:22 ` Jeff Layton
2016-10-14 0:22 ` NeilBrown
2016-10-14 10:49 ` Jeff Layton
2016-12-19 0:33 ` [PATCH] NFSv4: ensure __nfs4_find_lock_state returns consistent result NeilBrown
2016-10-13 15:31 ` [PATCH 0/6] NFSv4: Fix stateid used when flock locks in use. - V2 Jeff Layton
2016-10-18 21:52 ` NeilBrown
2016-11-18 4:59 ` NeilBrown
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