The patch titled
taskstats: factor out reply assembling
has been added to the -mm tree. Its filename is
taskstats-factor-out-reply-assembling.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: taskstats: factor out reply assembling
From: Oleg Nesterov <oleg@xxxxxxxxxx>
Introduce mk_reply() helper which does all nla_put()s on reply.
Saves 453 bytes and a preparation for the next patch.
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Shailabh Nagar <nagar@xxxxxxxxxxxxxx>
Cc: Balbir Singh <balbir@xxxxxxxxxx>
Cc: Jay Lan <jlan@xxxxxxx>
Cc: Thomas Graf <tgraf@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
kernel/taskstats.c | 55 +++++++++++++++++++++----------------------
1 files changed, 28 insertions(+), 27 deletions(-)
diff -puN kernel/taskstats.c~taskstats-factor-out-reply-assembling kernel/taskstats.c
--- a/kernel/taskstats.c~taskstats-factor-out-reply-assembling
+++ a/kernel/taskstats.c
@@ -348,6 +348,25 @@ static int parse(struct nlattr *na, cpum
return ret;
}
+static int mk_reply(struct sk_buff *skb, int type, u32 pid, struct taskstats *stats)
+{
+ struct nlattr *na;
+ int aggr;
+
+ aggr = TASKSTATS_TYPE_AGGR_TGID;
+ if (type == TASKSTATS_TYPE_PID)
+ aggr = TASKSTATS_TYPE_AGGR_PID;
+
+ na = nla_nest_start(skb, aggr);
+ NLA_PUT_U32(skb, type, pid);
+ NLA_PUT_TYPE(skb, struct taskstats, TASKSTATS_TYPE_STATS, *stats);
+ nla_nest_end(skb, na);
+
+ return 0;
+nla_put_failure:
+ return -1;
+}
+
static int taskstats_user_cmd(struct sk_buff *skb, struct genl_info *info)
{
int rc = 0;
@@ -355,7 +374,6 @@ static int taskstats_user_cmd(struct sk_
struct taskstats stats;
void *reply;
size_t size;
- struct nlattr *na;
cpumask_t mask;
rc = parse(info->attrs[TASKSTATS_CMD_ATTR_REGISTER_CPUMASK], &mask);
@@ -387,27 +405,21 @@ static int taskstats_user_cmd(struct sk_
if (rc < 0)
goto err;
- na = nla_nest_start(rep_skb, TASKSTATS_TYPE_AGGR_PID);
- NLA_PUT_U32(rep_skb, TASKSTATS_TYPE_PID, pid);
- NLA_PUT_TYPE(rep_skb, struct taskstats, TASKSTATS_TYPE_STATS,
- stats);
+ if (mk_reply(rep_skb, TASKSTATS_TYPE_PID, pid, &stats))
+ goto nla_put_failure;
} else if (info->attrs[TASKSTATS_CMD_ATTR_TGID]) {
u32 tgid = nla_get_u32(info->attrs[TASKSTATS_CMD_ATTR_TGID]);
rc = fill_tgid(tgid, NULL, &stats);
if (rc < 0)
goto err;
- na = nla_nest_start(rep_skb, TASKSTATS_TYPE_AGGR_TGID);
- NLA_PUT_U32(rep_skb, TASKSTATS_TYPE_TGID, tgid);
- NLA_PUT_TYPE(rep_skb, struct taskstats, TASKSTATS_TYPE_STATS,
- stats);
+ if (mk_reply(rep_skb, TASKSTATS_TYPE_TGID, tgid, &stats))
+ goto nla_put_failure;
} else {
rc = -EINVAL;
goto err;
}
- nla_nest_end(rep_skb, na);
-
return send_reply(rep_skb, info->snd_pid);
nla_put_failure:
@@ -451,7 +463,6 @@ void taskstats_exit(struct task_struct *
void *reply;
size_t size;
int is_thread_group;
- struct nlattr *na;
if (!family_registered)
return;
@@ -486,27 +497,17 @@ void taskstats_exit(struct task_struct *
if (rc < 0)
goto err_skb;
- na = nla_nest_start(rep_skb, TASKSTATS_TYPE_AGGR_PID);
- NLA_PUT_U32(rep_skb, TASKSTATS_TYPE_PID, (u32)tsk->pid);
- NLA_PUT_TYPE(rep_skb, struct taskstats, TASKSTATS_TYPE_STATS,
- *tidstats);
- nla_nest_end(rep_skb, na);
-
- if (!is_thread_group)
- goto send;
+ if (mk_reply(rep_skb, TASKSTATS_TYPE_PID, tsk->pid, tidstats))
+ goto nla_put_failure;
/*
* Doesn't matter if tsk is the leader or the last group member leaving
*/
- if (!group_dead)
+ if (!is_thread_group || !group_dead)
goto send;
- na = nla_nest_start(rep_skb, TASKSTATS_TYPE_AGGR_TGID);
- NLA_PUT_U32(rep_skb, TASKSTATS_TYPE_TGID, (u32)tsk->tgid);
- /* No locking needed for tsk->signal->stats since group is dead */
- NLA_PUT_TYPE(rep_skb, struct taskstats, TASKSTATS_TYPE_STATS,
- *tsk->signal->stats);
- nla_nest_end(rep_skb, na);
+ if (mk_reply(rep_skb, TASKSTATS_TYPE_TGID, tsk->tgid, tsk->signal->stats))
+ goto nla_put_failure;
send:
send_cpu_listeners(rep_skb, listeners);
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
origin.patch
taskstats_exit_alloc-optimize-simplify.patch
taskstats-cleanup-do_exit-path.patch
taskstats-cleanup-signal-stats-allocation.patch
taskstats-factor-out-reply-assembling.patch
taskstats-use-nla_reserve-for-reply-assembling.patch
tty-signal-tty-locking.patch
do_task_stat-dont-take-tty_mutex.patch
do_acct_process-dont-take-tty_mutex.patch
trivial-make-set_special_pids-static.patch
sys_unshare-remove-a-broken-clone_sighand-code.patch
sys_setpgid-eliminate-unnecessary-do_each_task_pidpidtype_pgid.patch
session_of_pgrp-kill-unnecessary-do_each_task_pidpidtype_pgid.patch
pidhash-temporary-debug-checks.patch
-
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