The patch titled
Subject: fs/ocfs2/cluster/netdebug.c: use seq_open_private() not seq_open()
has been added to the -mm tree. Its filename is
fs-ocfs2-cluster-netdebugc-use-seq_open_private-not-seq_open.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/fs-ocfs2-cluster-netdebugc-use-seq_open_private-not-seq_open.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/fs-ocfs2-cluster-netdebugc-use-seq_open_private-not-seq_open.patch
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------------------------------------------------------
From: Rob Jones <rob.jones@xxxxxxxxxxxxxxx>
Subject: fs/ocfs2/cluster/netdebug.c: use seq_open_private() not seq_open()
Reduce boilerplate code by using seq_open_private() instead of seq_open()
Note that the code in and using sc_common_open() has been quite
extensively changed. Not least because there was a latent memory leak in
the code as was: if sc_common_open() failed, the previously allocated
buffer was not freed.
Signed-off-by: Rob Jones <rob.jones@xxxxxxxxxxxxxxx>
Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
Cc: Mark Fasheh <mfasheh@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ocfs2/cluster/netdebug.c | 78 ++++++++--------------------------
1 file changed, 19 insertions(+), 59 deletions(-)
diff -puN fs/ocfs2/cluster/netdebug.c~fs-ocfs2-cluster-netdebugc-use-seq_open_private-not-seq_open fs/ocfs2/cluster/netdebug.c
--- a/fs/ocfs2/cluster/netdebug.c~fs-ocfs2-cluster-netdebugc-use-seq_open_private-not-seq_open
+++ a/fs/ocfs2/cluster/netdebug.c
@@ -185,29 +185,13 @@ static const struct seq_operations nst_s
static int nst_fop_open(struct inode *inode, struct file *file)
{
struct o2net_send_tracking *dummy_nst;
- struct seq_file *seq;
- int ret;
- dummy_nst = kmalloc(sizeof(struct o2net_send_tracking), GFP_KERNEL);
- if (dummy_nst == NULL) {
- ret = -ENOMEM;
- goto out;
- }
- dummy_nst->st_task = NULL;
-
- ret = seq_open(file, &nst_seq_ops);
- if (ret)
- goto out;
-
- seq = file->private_data;
- seq->private = dummy_nst;
+ dummy_nst = __seq_open_private(file, &nst_seq_ops, sizeof(*dummy_nst));
+ if (!dummy_nst)
+ return -ENOMEM;
o2net_debug_add_nst(dummy_nst);
- dummy_nst = NULL;
-
-out:
- kfree(dummy_nst);
- return ret;
+ return 0;
}
static int nst_fop_release(struct inode *inode, struct file *file)
@@ -412,33 +396,27 @@ static const struct seq_operations sc_se
.show = sc_seq_show,
};
-static int sc_common_open(struct file *file, struct o2net_sock_debug *sd)
+static int sc_common_open(struct file *file, int ctxt)
{
+ struct o2net_sock_debug *sd;
struct o2net_sock_container *dummy_sc;
- struct seq_file *seq;
- int ret;
- dummy_sc = kmalloc(sizeof(struct o2net_sock_container), GFP_KERNEL);
- if (dummy_sc == NULL) {
- ret = -ENOMEM;
- goto out;
- }
- dummy_sc->sc_page = NULL;
+ dummy_sc = kzalloc(sizeof(*dummy_sc), GFP_KERNEL);
+ if (!dummy_sc)
+ return -ENOMEM;
- ret = seq_open(file, &sc_seq_ops);
- if (ret)
- goto out;
+ sd = __seq_open_private(file, &sc_seq_ops, sizeof(*sd));
+ if (!sd) {
+ kfree(dummy_sc);
+ return -ENOMEM;
+ }
- seq = file->private_data;
- seq->private = sd;
+ sd->dbg_ctxt = ctxt;
sd->dbg_sock = dummy_sc;
- o2net_debug_add_sc(dummy_sc);
- dummy_sc = NULL;
+ o2net_debug_add_sc(dummy_sc);
-out:
- kfree(dummy_sc);
- return ret;
+ return 0;
}
static int sc_fop_release(struct inode *inode, struct file *file)
@@ -453,16 +431,7 @@ static int sc_fop_release(struct inode *
static int stats_fop_open(struct inode *inode, struct file *file)
{
- struct o2net_sock_debug *sd;
-
- sd = kmalloc(sizeof(struct o2net_sock_debug), GFP_KERNEL);
- if (sd == NULL)
- return -ENOMEM;
-
- sd->dbg_ctxt = SHOW_SOCK_STATS;
- sd->dbg_sock = NULL;
-
- return sc_common_open(file, sd);
+ return sc_common_open(file, SHOW_SOCK_STATS);
}
static const struct file_operations stats_seq_fops = {
@@ -474,16 +443,7 @@ static const struct file_operations stat
static int sc_fop_open(struct inode *inode, struct file *file)
{
- struct o2net_sock_debug *sd;
-
- sd = kmalloc(sizeof(struct o2net_sock_debug), GFP_KERNEL);
- if (sd == NULL)
- return -ENOMEM;
-
- sd->dbg_ctxt = SHOW_SOCK_CONTAINERS;
- sd->dbg_sock = NULL;
-
- return sc_common_open(file, sd);
+ return sc_common_open(file, SHOW_SOCK_CONTAINERS);
}
static const struct file_operations sc_seq_fops = {
_
Patches currently in -mm which might be from rob.jones@xxxxxxxxxxxxxxx are
fs-ocfs2-dlm-dlmdebugc-use-seq_open_private-not-seq_open.patch
fs-ocfs2-cluster-netdebugc-use-seq_open_private-not-seq_open.patch
fs-ocfs2-dlmgluec-use-__seq_open_private-not-seq_open.patch
mm-use-seq_open_private-instead-of-seq_open.patch
mm-use-__seq_open_private-instead-of-seq_open.patch
lib-use-seq_open_private-instead-of-seq_open.patch
ipc-use-__seq_open_private-instead-of-seq_open.patch
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