From: Andrey Vagin <avagin@openvz.org>
To: linux-kernel@vger.kernel.org
Cc: linux-api@vger.kernel.org, Andrey Vagin <avagin@openvz.org>,
Oleg Nesterov <oleg@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Cyrill Gorcunov <gorcunov@openvz.org>,
Pavel Emelyanov <xemul@parallels.com>,
Roger Luethi <rl@hellgate.ch>, Arnd Bergmann <arnd@arndb.de>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
David Ahern <dsahern@gmail.com>,
Andy Lutomirski <luto@amacapital.net>,
Pavel Odintsov <pavel.odintsov@gmail.com>
Subject: [PATCH 05/24] task_diag: add ability to get information about all tasks
Date: Mon, 6 Jul 2015 11:47:06 +0300 [thread overview]
Message-ID: <1436172445-6979-6-git-send-email-avagin@openvz.org> (raw)
In-Reply-To: <1436172445-6979-1-git-send-email-avagin@openvz.org>
For that we need to set NLM_F_DUMP. A response contain on a few packets.
Signed-off-by: Andrey Vagin <avagin@openvz.org>
---
include/linux/taskstats_kern.h | 2 ++
kernel/taskdiag.c | 40 ++++++++++++++++++++++++++++++++++++++++
kernel/taskstats.c | 1 +
3 files changed, 43 insertions(+)
diff --git a/include/linux/taskstats_kern.h b/include/linux/taskstats_kern.h
index a1fd4f8..716835f 100644
--- a/include/linux/taskstats_kern.h
+++ b/include/linux/taskstats_kern.h
@@ -29,6 +29,8 @@ extern void taskstats_init_early(void);
struct genl_info;
struct sk_buff;
int taskdiag_doit(struct sk_buff *skb, struct genl_info *info);
+struct netlink_callback;
+int taskdiag_dumpit(struct sk_buff *skb, struct netlink_callback *cb);
#else
static inline void taskstats_exit(struct task_struct *tsk, int group_dead)
diff --git a/kernel/taskdiag.c b/kernel/taskdiag.c
index 7327e08..3497304 100644
--- a/kernel/taskdiag.c
+++ b/kernel/taskdiag.c
@@ -112,6 +112,46 @@ err:
return err;
}
+int taskdiag_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct pid_namespace *ns = task_active_pid_ns(current);
+ struct tgid_iter iter;
+ struct nlattr *na;
+ struct task_diag_pid req;
+ int rc;
+
+ if (nlmsg_len(cb->nlh) < GENL_HDRLEN + sizeof(req))
+ return -EINVAL;
+
+ na = nlmsg_data(cb->nlh) + GENL_HDRLEN;
+ if (na->nla_type < 0)
+ return -EINVAL;
+
+ memcpy(&req, nla_data(na), sizeof(req));
+
+ iter.tgid = cb->args[0];
+ iter.task = NULL;
+ for (iter = next_tgid(ns, iter);
+ iter.task;
+ iter.tgid += 1, iter = next_tgid(ns, iter)) {
+ if (!ptrace_may_access(iter.task, PTRACE_MODE_READ))
+ continue;
+
+ rc = task_diag_fill(iter.task, skb, req.show_flags,
+ NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq);
+ if (rc < 0) {
+ put_task_struct(iter.task);
+ if (rc != -EMSGSIZE)
+ return rc;
+ break;
+ }
+ }
+
+ cb->args[0] = iter.tgid;
+
+ return skb->len;
+}
+
int taskdiag_doit(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr *nla = info->attrs[TASK_DIAG_CMD_ATTR_GET];
diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index 0c90d11..40f2cdf2 100644
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -691,6 +691,7 @@ static const struct genl_ops taskstats_ops[] = {
{
.cmd = TASK_DIAG_CMD_GET,
.doit = taskdiag_doit,
+ .dumpit = taskdiag_dumpit,
.policy = taskdiag_cmd_get_policy,
},
#endif
--
2.1.0
WARNING: multiple messages have this Message-ID (diff)
From: Andrey Vagin <avagin-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org>
To: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Andrey Vagin <avagin-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org>,
Oleg Nesterov <oleg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Cyrill Gorcunov
<gorcunov-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org>,
Pavel Emelyanov <xemul-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>,
Roger Luethi <rl-7uj+XXdSDtwfv37vnLkPlQ@public.gmane.org>,
Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>,
Arnaldo Carvalho de Melo
<acme-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
David Ahern <dsahern-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Andy Lutomirski <luto-kltTT9wpgjJwATOyAt5JVQ@public.gmane.org>,
Pavel Odintsov
<pavel.odintsov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: [PATCH 05/24] task_diag: add ability to get information about all tasks
Date: Mon, 6 Jul 2015 11:47:06 +0300 [thread overview]
Message-ID: <1436172445-6979-6-git-send-email-avagin@openvz.org> (raw)
In-Reply-To: <1436172445-6979-1-git-send-email-avagin-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org>
For that we need to set NLM_F_DUMP. A response contain on a few packets.
Signed-off-by: Andrey Vagin <avagin-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org>
---
include/linux/taskstats_kern.h | 2 ++
kernel/taskdiag.c | 40 ++++++++++++++++++++++++++++++++++++++++
kernel/taskstats.c | 1 +
3 files changed, 43 insertions(+)
diff --git a/include/linux/taskstats_kern.h b/include/linux/taskstats_kern.h
index a1fd4f8..716835f 100644
--- a/include/linux/taskstats_kern.h
+++ b/include/linux/taskstats_kern.h
@@ -29,6 +29,8 @@ extern void taskstats_init_early(void);
struct genl_info;
struct sk_buff;
int taskdiag_doit(struct sk_buff *skb, struct genl_info *info);
+struct netlink_callback;
+int taskdiag_dumpit(struct sk_buff *skb, struct netlink_callback *cb);
#else
static inline void taskstats_exit(struct task_struct *tsk, int group_dead)
diff --git a/kernel/taskdiag.c b/kernel/taskdiag.c
index 7327e08..3497304 100644
--- a/kernel/taskdiag.c
+++ b/kernel/taskdiag.c
@@ -112,6 +112,46 @@ err:
return err;
}
+int taskdiag_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct pid_namespace *ns = task_active_pid_ns(current);
+ struct tgid_iter iter;
+ struct nlattr *na;
+ struct task_diag_pid req;
+ int rc;
+
+ if (nlmsg_len(cb->nlh) < GENL_HDRLEN + sizeof(req))
+ return -EINVAL;
+
+ na = nlmsg_data(cb->nlh) + GENL_HDRLEN;
+ if (na->nla_type < 0)
+ return -EINVAL;
+
+ memcpy(&req, nla_data(na), sizeof(req));
+
+ iter.tgid = cb->args[0];
+ iter.task = NULL;
+ for (iter = next_tgid(ns, iter);
+ iter.task;
+ iter.tgid += 1, iter = next_tgid(ns, iter)) {
+ if (!ptrace_may_access(iter.task, PTRACE_MODE_READ))
+ continue;
+
+ rc = task_diag_fill(iter.task, skb, req.show_flags,
+ NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq);
+ if (rc < 0) {
+ put_task_struct(iter.task);
+ if (rc != -EMSGSIZE)
+ return rc;
+ break;
+ }
+ }
+
+ cb->args[0] = iter.tgid;
+
+ return skb->len;
+}
+
int taskdiag_doit(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr *nla = info->attrs[TASK_DIAG_CMD_ATTR_GET];
diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index 0c90d11..40f2cdf2 100644
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -691,6 +691,7 @@ static const struct genl_ops taskstats_ops[] = {
{
.cmd = TASK_DIAG_CMD_GET,
.doit = taskdiag_doit,
+ .dumpit = taskdiag_dumpit,
.policy = taskdiag_cmd_get_policy,
},
#endif
--
2.1.0
next prev parent reply other threads:[~2015-07-06 8:50 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-06 8:47 [PATCH 0/24] kernel: add a netlink interface to get information about processes (v2) Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 01/24] kernel: define taststats commands in the one place Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 02/24] kernel: add a netlink interface to get information about tasks (v2) Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 03/24] kernel: make taskstats available from all net namespaces Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 04/24] kernel: move next_tgid from fs/proc Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin [this message]
2015-07-06 8:47 ` [PATCH 05/24] task_diag: add ability to get information about all tasks Andrey Vagin
2015-07-06 8:47 ` [PATCH 06/24] task_diag: add ability to split per-task data on a few netlink messages Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 07/24] task_diag: add a new group to get process credentials Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 08/24] proc: pick out a function to iterate task children Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-14 18:02 ` Oleg Nesterov
2015-07-14 18:02 ` Oleg Nesterov
2015-07-17 15:57 ` Andrew Vagin
2015-07-17 15:57 ` Andrew Vagin
2015-07-18 21:22 ` Oleg Nesterov
2015-07-18 21:22 ` Oleg Nesterov
2015-07-06 8:47 ` [PATCH 09/24] proc: move task_next_child() from fs/proc Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 10/24] task_diag: add ability to dump children (v2) Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 11/24] task_diag: add a new group to get task statistics Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 12/24] task_diag: add a new group to get tasks memory mappings (v2) Andrey Vagin
2015-07-14 18:08 ` Oleg Nesterov
2015-07-14 18:08 ` Oleg Nesterov
2015-07-15 2:02 ` David Ahern
2015-07-15 2:02 ` David Ahern
2015-07-06 8:47 ` [PATCH 13/24] task_diag: shows memory consumption for " Andrey Vagin
2015-07-06 8:47 ` [PATCH 14/24] task_diag: add a marcos to enumirate memory mappings Andrey Vagin
2015-07-06 8:47 ` [PATCH 15/24] proc: give task_struct instead of pid into first_tid Andrey Vagin
2015-07-14 18:11 ` Oleg Nesterov
2015-07-06 8:47 ` [PATCH 16/24] proc: move first_tid and next_tid out of proc Andrey Vagin
2015-07-06 8:47 ` [PATCH 17/24] task_diag: add ability to dump theads Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 18/24] task_diag: add ability to handle one task in a continious mode Andrey Vagin
2015-07-06 8:47 ` [PATCH 19/24] task_diag: Add option to dump all threads for all tasks Andrey Vagin
2015-07-06 8:47 ` [PATCH 20/24] task_diag: Only add VMAs for thread_group leader Andrey Vagin
2015-07-14 17:47 ` Oleg Nesterov
2015-07-14 17:47 ` Oleg Nesterov
2015-07-15 2:01 ` David Ahern
2015-07-15 13:31 ` Oleg Nesterov
2015-07-15 13:31 ` Oleg Nesterov
2015-07-06 8:47 ` [PATCH 21/24] task diag: Add support for TGID attribute Andrey Vagin
2015-07-06 8:47 ` [PATCH 22/24] Documentation: add documentation for task_diag Andrey Vagin
2015-07-06 8:47 ` [PATCH 23/24] selftest: check the task_diag functinonality Andrey Vagin
2015-07-06 8:47 ` [PATCH 24/24] task_diag: Enhance fork tool to spawn threads Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 17:10 ` [PATCH 0/24] kernel: add a netlink interface to get information about processes (v2) Andy Lutomirski
2015-07-07 15:43 ` Andrew Vagin
2015-07-07 15:56 ` Andy Lutomirski
2015-07-07 15:56 ` Andy Lutomirski
2015-07-07 16:17 ` David Ahern
2015-07-07 16:17 ` David Ahern
2015-07-07 16:24 ` Andy Lutomirski
2015-07-07 16:41 ` David Ahern
2015-07-07 16:41 ` David Ahern
2015-07-08 16:10 ` Andrew Vagin
2015-07-08 16:10 ` Andrew Vagin
2015-07-08 17:39 ` Andy Lutomirski
2015-07-08 22:49 ` Andrey Vagin
2015-07-08 23:48 ` Andy Lutomirski
2015-07-08 23:48 ` Andy Lutomirski
2015-07-07 16:25 ` Arnaldo Carvalho de Melo
2015-07-07 16:25 ` Arnaldo Carvalho de Melo
2015-07-07 16:27 ` Andy Lutomirski
2015-07-07 16:27 ` Andy Lutomirski
2015-07-07 16:56 ` David Ahern
2015-07-07 16:56 ` David Ahern
2015-11-24 15:18 ` Andrew Vagin
2015-11-24 15:18 ` Andrew Vagin
2015-12-03 23:20 ` Andy Lutomirski
2015-12-03 23:20 ` Andy Lutomirski
2015-12-03 23:43 ` Arnd Bergmann
2015-12-14 8:05 ` Andrew Vagin
2015-12-14 8:05 ` Andrew Vagin
2015-12-14 7:52 ` Andrew Vagin
2015-12-14 7:52 ` Andrew Vagin
2015-12-14 22:38 ` Andy Lutomirski
2015-12-15 15:53 ` Andrew Vagin
2015-12-15 15:53 ` Andrew Vagin
2015-12-15 16:43 ` Andy Lutomirski
2015-12-15 16:43 ` Andy Lutomirski
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