The patch titled
taskstats: separate taskstats commands
has been added to the -mm tree. Its filename is
taskstats-separate-taskstats-commands.patch
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The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: taskstats: separate taskstats commands
From: Michael Holzheu <holzheu@xxxxxxxxxxxxxxxxxx>
Move each taskstats command into a single function. This makes the code
more readable and makes it easier to add new commands.
Signed-off-by: Michael Holzheu <holzheu@xxxxxxxxxxxxxxxxxx>
Acked-by: Balbir Singh <balbir@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/taskstats.c | 118 ++++++++++++++++++++++++++++---------------
1 file changed, 78 insertions(+), 40 deletions(-)
diff -puN kernel/taskstats.c~taskstats-separate-taskstats-commands kernel/taskstats.c
--- a/kernel/taskstats.c~taskstats-separate-taskstats-commands
+++ a/kernel/taskstats.c
@@ -424,39 +424,76 @@ err:
return rc;
}
-static int taskstats_user_cmd(struct sk_buff *skb, struct genl_info *info)
+static int cmd_attr_register_cpumask(struct genl_info *info)
{
- int rc;
- struct sk_buff *rep_skb;
- struct taskstats *stats;
- size_t size;
cpumask_var_t mask;
+ int rc;
if (!alloc_cpumask_var(&mask, GFP_KERNEL))
return -ENOMEM;
-
rc = parse(info->attrs[TASKSTATS_CMD_ATTR_REGISTER_CPUMASK], mask);
if (rc < 0)
- goto free_return_rc;
- if (rc == 0) {
- rc = add_del_listener(info->snd_pid, mask, REGISTER);
- goto free_return_rc;
- }
+ goto out;
+ rc = add_del_listener(info->snd_pid, mask, REGISTER);
+out:
+ free_cpumask_var(mask);
+ return rc;
+}
+
+static int cmd_attr_deregister_cpumask(struct genl_info *info)
+{
+ cpumask_var_t mask;
+ int rc;
+ if (!alloc_cpumask_var(&mask, GFP_KERNEL))
+ return -ENOMEM;
rc = parse(info->attrs[TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK], mask);
if (rc < 0)
- goto free_return_rc;
- if (rc == 0) {
- rc = add_del_listener(info->snd_pid, mask, DEREGISTER);
-free_return_rc:
- free_cpumask_var(mask);
- return rc;
- }
+ goto out;
+ rc = add_del_listener(info->snd_pid, mask, DEREGISTER);
+out:
free_cpumask_var(mask);
+ return rc;
+}
+
+static int cmd_attr_pid(struct genl_info *info)
+{
+ struct taskstats *stats;
+ struct sk_buff *rep_skb;
+ size_t size;
+ u32 pid;
+ int rc;
+
+ size = nla_total_size(sizeof(u32)) +
+ nla_total_size(sizeof(struct taskstats)) + nla_total_size(0);
+
+ rc = prepare_reply(info, TASKSTATS_CMD_NEW, &rep_skb, size);
+ if (rc < 0)
+ return rc;
+
+ rc = -EINVAL;
+ pid = nla_get_u32(info->attrs[TASKSTATS_CMD_ATTR_PID]);
+ stats = mk_reply(rep_skb, TASKSTATS_TYPE_PID, pid);
+ if (!stats)
+ goto err;
+
+ rc = fill_pid(pid, NULL, stats);
+ if (rc < 0)
+ goto err;
+ return send_reply(rep_skb, info);
+err:
+ nlmsg_free(rep_skb);
+ return rc;
+}
+
+static int cmd_attr_tgid(struct genl_info *info)
+{
+ struct taskstats *stats;
+ struct sk_buff *rep_skb;
+ size_t size;
+ u32 tgid;
+ int rc;
- /*
- * Size includes space for nested attributes
- */
size = nla_total_size(sizeof(u32)) +
nla_total_size(sizeof(struct taskstats)) + nla_total_size(0);
@@ -465,33 +502,34 @@ free_return_rc:
return rc;
rc = -EINVAL;
- if (info->attrs[TASKSTATS_CMD_ATTR_PID]) {
- u32 pid = nla_get_u32(info->attrs[TASKSTATS_CMD_ATTR_PID]);
- stats = mk_reply(rep_skb, TASKSTATS_TYPE_PID, pid);
- if (!stats)
- goto err;
-
- rc = fill_pid(pid, NULL, stats);
- if (rc < 0)
- goto err;
- } else if (info->attrs[TASKSTATS_CMD_ATTR_TGID]) {
- u32 tgid = nla_get_u32(info->attrs[TASKSTATS_CMD_ATTR_TGID]);
- stats = mk_reply(rep_skb, TASKSTATS_TYPE_TGID, tgid);
- if (!stats)
- goto err;
-
- rc = fill_tgid(tgid, NULL, stats);
- if (rc < 0)
- goto err;
- } else
+ tgid = nla_get_u32(info->attrs[TASKSTATS_CMD_ATTR_TGID]);
+ stats = mk_reply(rep_skb, TASKSTATS_TYPE_TGID, tgid);
+ if (!stats)
goto err;
+ rc = fill_tgid(tgid, NULL, stats);
+ if (rc < 0)
+ goto err;
return send_reply(rep_skb, info);
err:
nlmsg_free(rep_skb);
return rc;
}
+static int taskstats_user_cmd(struct sk_buff *skb, struct genl_info *info)
+{
+ if (info->attrs[TASKSTATS_CMD_ATTR_REGISTER_CPUMASK])
+ return cmd_attr_register_cpumask(info);
+ else if (info->attrs[TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK])
+ return cmd_attr_deregister_cpumask(info);
+ else if (info->attrs[TASKSTATS_CMD_ATTR_PID])
+ return cmd_attr_pid(info);
+ else if (info->attrs[TASKSTATS_CMD_ATTR_TGID])
+ return cmd_attr_tgid(info);
+ else
+ return -EINVAL;
+}
+
static struct taskstats *taskstats_tgid_alloc(struct task_struct *tsk)
{
struct signal_struct *sig = tsk->signal;
_
Patches currently in -mm which might be from holzheu@xxxxxxxxxxxxxxxxxx are
initramfs-fix-initramfs-size-calculation.patch
taskstats-separate-taskstats-commands.patch
taskstats-split-fill_pid-function.patch
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