From: Serge Hallyn <serue@us.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: Hubertus Franke <frankeh@watson.ibm.com>,
Cedric Le Goater <clg@fr.ibm.com>,
Dave Hansen <haveblue@us.ibm.com>,
Serge E Hallyn <serue@us.ibm.com>
Subject: RFC [patch 30/34] PID Virtualization /proc/container filesystem
Date: Tue, 17 Jan 2006 08:33:28 -0600 [thread overview]
Message-ID: <20060117143329.214857000@sergelap> (raw)
In-Reply-To: 20060117143258.150807000@sergelap
[-- Attachment #1: G4-container-procfs.patch --]
[-- Type: text/plain, Size: 4253 bytes --]
Provide the /proc/container directory to
containerize a process or retrieve an associated container.
We need a reasonable quick mechanism to trigger container creation.
A process becomes the root of a container if it writes
a unique name to the /proc/container file. If the process does
not already belong to a container and the name is unique,
a container is created and the calling process becomes the root.
Reading from the file returns the name of the container.
Signed-off-by: Hubertus Franke <frankeh@watson.ibm.com>
---
Makefile | 2
container_api.c | 116 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 117 insertions(+), 1 deletion(-)
Index: linux-2.6.15/kernel/Makefile
===================================================================
--- linux-2.6.15.orig/kernel/Makefile 2006-01-17 08:37:08.000000000 -0500
+++ linux-2.6.15/kernel/Makefile 2006-01-17 08:37:09.000000000 -0500
@@ -8,7 +8,7 @@
signal.o sys.o kmod.o workqueue.o pid.o \
rcupdate.o intermodule.o extable.o params.o posix-timers.o \
kthread.o wait.o kfifo.o sys_ni.o posix-cpu-timers.o \
- container.o
+ container.o container_api.o
obj-$(CONFIG_FUTEX) += futex.o
obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o
Index: linux-2.6.15/kernel/container_api.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.15/kernel/container_api.c 2006-01-17 08:37:09.000000000 -0500
@@ -0,0 +1,116 @@
+/*
+ * External Interface to containers
+ *
+ * This is only for quick bootstrapping the container support
+ * A proper external API needs to be found
+ *
+ * Copyright (C) Hubertus Franke, IBM Corp. 2005 <frankeh@watson.ibm.com>
+ *
+ */
+
+/* Changes
+ *
+ * 11/22/2005: Created
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <asm/uaccess.h>
+#include <linux/proc_fs.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/container.h>
+
+MODULE_LICENSE("GPL");
+
+#define DPRINTK( fmt, args...) // printk( "%s: " fmt, __FUNCTION__, ##args)
+
+/****************************************************************
+ * P R O C F S S T U F F
+ ****************************************************************/
+
+static ssize_t container_write(struct file *file, const char __user *ubuf,
+ size_t count, loff_t *p)
+{
+ const char *delims = " \t\n";
+ char kbuf[MAX_CONTAINER_NAME_LEN];
+ char *cptr;
+ char *cname;
+ int rc;
+
+ if (current->container)
+ return -EPERM;
+ if (count >= MAX_CONTAINER_NAME_LEN)
+ return -EINVAL;
+ if (copy_from_user(kbuf, ubuf, count))
+ return -EFAULT;
+ kbuf[MAX_CONTAINER_NAME_LEN-1] = '\0';
+
+ cptr = kbuf;
+ cname = strsep(&cptr,delims);
+ DPRINTK("<%s:%d>: <%s>\n", current->comm, task_pid(current), cname);
+ rc = container_new(cname);
+ if (rc < 0)
+ return rc;
+ return count;
+}
+
+static ssize_t container_read(struct file *file, char __user *ubuf,
+ size_t count, loff_t *ppos)
+{
+ char kbuf[MAX_CONTAINER_NAME_LEN];
+ int len;
+ char *cname;
+ loff_t __ppos = *ppos;
+
+ cname = current->container ? current->container->name : "";
+ len = sprintf(kbuf,"%s\n",cname);
+ if (__ppos >= len)
+ return 0;
+ if (count > len-__ppos)
+ count = len-__ppos;
+ if (copy_to_user(ubuf, kbuf+__ppos, count))
+ return -EFAULT;
+ *ppos += __ppos + count;
+ DPRINTK("%s: caller <%s:%d>: <%s>\n",
+ current->comm, task_pid(current), cname);
+ return count;
+}
+
+static struct file_operations container_proc_operations = {
+ .read = container_read,
+ .write = container_write,
+};
+
+/****************************************************************
+ *
+ ****************************************************************/
+
+static int __init container_init(void)
+{
+ int rc = 0;
+ struct proc_dir_entry *entry;
+
+ entry = create_proc_entry("container", S_IWUGO|S_IRUGO, NULL);
+ if (entry)
+ entry->proc_fops = &container_proc_operations;
+ else
+ rc = -EINVAL;
+
+ /* Other initialization */
+
+ if (rc)
+ remove_proc_entry("container", NULL);
+ return rc;
+}
+
+static void __exit container_exit(void)
+{
+}
+
+module_init(container_init);
+module_exit(container_exit);
+
--
next prev parent reply other threads:[~2006-01-17 14:59 UTC|newest]
Thread overview: 136+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-17 14:32 RFC [patch 00/34] PID Virtualization Overview Serge Hallyn
2006-01-17 14:32 ` RFC [patch 01/34] PID Virtualization Change pid accesses: drivers Serge Hallyn
2006-01-17 14:33 ` RFC [patch 02/34] PID Virtualization Change pid accesses: most archs Serge Hallyn
2006-01-17 14:33 ` RFC [patch 03/34] PID Virtualization Change pid accesses: filesystems Serge Hallyn
2006-01-17 14:33 ` RFC [patch 04/34] PID Virtualization Change pid accesses: include/ Serge Hallyn
2006-01-17 14:33 ` RFC [patch 05/34] PID Virtualization Change pid accesses: ipc Serge Hallyn
2006-01-17 14:33 ` RFC [patch 06/34] PID Virtualization Change pid accesses: kernel/ Serge Hallyn
2006-01-17 14:33 ` RFC [patch 07/34] PID Virtualization Change pid accesses: lib/ Serge Hallyn
2006-01-17 14:33 ` RFC [patch 08/34] PID Virtualization Change pid accesses: mm/ Serge Hallyn
2006-01-17 14:33 ` RFC [patch 09/34] PID Virtualization Change pid accesses: net/ Serge Hallyn
2006-01-17 14:33 ` RFC [patch 10/34] PID Virtualization Change pid accesses: security/ Serge Hallyn
2006-01-17 14:33 ` RFC [patch 11/34] PID Virtualization Change pid accesses: sound/ Serge Hallyn
2006-01-17 14:33 ` RFC [patch 12/34] PID Virtualization Change pid accesses: ia64 and mips Serge Hallyn
2006-01-17 14:33 ` RFC [patch 13/34] PID Virtualization Define new task_pid api Serge Hallyn
2006-01-17 15:32 ` Arjan van de Ven
2006-01-17 15:56 ` Serge E. Hallyn
2006-01-17 16:02 ` Arjan van de Ven
2006-01-17 16:03 ` Alan Cox
2006-01-17 17:16 ` Kyle Moffett
2006-01-17 17:25 ` Dave Hansen
2006-01-18 4:54 ` Greg KH
2006-01-18 4:55 ` Greg KH
2006-01-18 16:23 ` Dave Hansen
2006-01-20 17:00 ` Eric W. Biederman
2006-01-20 20:18 ` Hubertus Franke
2006-01-21 10:25 ` Eric W. Biederman
2006-01-23 18:38 ` Hubertus Franke
2006-01-23 18:48 ` Eric W. Biederman
2006-01-21 14:42 ` Eric W. Biederman
2006-01-22 6:43 ` Kyle Moffett
2006-01-22 15:48 ` Eric W. Biederman
2006-01-22 15:55 ` Arjan van de Ven
2006-01-22 16:24 ` Eric W. Biederman
2006-01-26 20:01 ` Herbert Poetzl
2006-01-27 9:04 ` Eric W. Biederman
2006-01-27 12:27 ` Kyle Moffett
2006-01-27 13:15 ` Eric W. Biederman
2006-01-23 18:50 ` Hubertus Franke
2006-01-23 19:28 ` Eric W. Biederman
2006-01-23 21:11 ` Alan Cox
2006-01-23 21:30 ` Eric W. Biederman
2006-01-23 22:15 ` Hubertus Franke
2006-01-24 6:56 ` Arjan van de Ven
2006-01-24 19:34 ` Eric W. Biederman
2006-01-24 21:09 ` Hubertus Franke
2006-01-24 0:22 ` Alan Cox
2006-01-24 19:26 ` Eric W. Biederman
2006-01-24 21:11 ` Alan Cox
2006-01-24 21:15 ` Arjan van de Ven
2006-01-25 9:58 ` Eric W. Biederman
2006-01-25 15:10 ` Trond Myklebust
2006-01-25 18:01 ` Eric W. Biederman
2006-01-25 19:30 ` Trond Myklebust
2006-01-25 21:59 ` Eric W. Biederman
2006-01-25 9:13 ` Eric W. Biederman
2006-01-25 9:51 ` Eric W. Biederman
2006-01-26 20:23 ` Herbert Poetzl
2006-01-27 8:28 ` Eric W. Biederman
[not found] ` <m1k6cqlmfe.fsf_-_@ebiederm.dsl.xmission.com>
2006-01-23 21:57 ` RFC: [PATCH] pids as weak references Dave Hansen
2006-01-31 21:02 ` RFC [patch 13/34] PID Virtualization Define new task_pid api Linus Torvalds
2006-02-01 0:01 ` Hubertus Franke
2006-02-01 4:18 ` Eric W. Biederman
2006-02-01 4:39 ` Linus Torvalds
2006-02-01 7:14 ` Eric W. Biederman
2006-02-01 16:41 ` Dave Hansen
2006-02-02 5:14 ` Herbert Poetzl
2006-02-01 16:29 ` Greg
2006-02-01 16:44 ` Eric W. Biederman
2006-02-02 13:50 ` Greg
2006-02-02 14:09 ` Eric W. Biederman
2006-02-02 14:48 ` Kirill Korotaev
2006-02-02 15:13 ` Eric W. Biederman
2006-02-02 15:26 ` Kirill Korotaev
2006-02-02 15:51 ` Eric W. Biederman
2006-02-02 16:05 ` Kirill Korotaev
2006-02-02 16:27 ` Eric W. Biederman
2006-02-02 21:32 ` Cedric Le Goater
2006-02-02 21:43 ` Hubertus Franke
2006-02-02 21:46 ` Eric W. Biederman
2006-02-03 10:07 ` Kirill Korotaev
2006-02-03 10:52 ` Kirill Korotaev
2006-02-03 11:09 ` Eric W. Biederman
2006-02-03 15:45 ` Dave Hansen
2006-02-03 16:35 ` Kirill Korotaev
2006-02-02 21:10 ` Cedric Le Goater
2006-02-02 21:24 ` Eric W. Biederman
2006-02-06 20:15 ` Pavel Machek
2006-02-06 20:34 ` Eric W. Biederman
2006-02-06 20:36 ` Kirill Korotaev
2006-02-06 20:40 ` Eric W. Biederman
2006-02-02 14:49 ` Kirill Korotaev
2006-01-17 14:33 ` RFC [patch 14/34] PID Virtualization const parameter for process group Serge Hallyn
2006-01-17 14:33 ` RFC [patch 15/34] PID Virtualization task virtual pid access functions Serge Hallyn
2006-01-17 14:33 ` RFC [patch 16/34] PID Virtualization return virtual pids where required Serge Hallyn
2006-01-17 14:33 ` RFC [patch 17/34] PID Virtualization return virtual process group ids Serge Hallyn
2006-01-17 14:33 ` RFC [patch 18/34] PID Virtualization code enhancements for virtual pids in /proc Serge Hallyn
2006-01-17 14:33 ` RFC [patch 19/34] PID Virtualization Define pid_to_vpid functions Serge Hallyn
2006-01-17 14:33 ` RFC [patch 20/34] PID Virtualization Use pid_to_vpid conversion functions Serge Hallyn
2006-01-17 14:33 ` RFC [patch 21/34] PID Virtualization file owner pid virtualization Serge Hallyn
2006-01-17 14:33 ` RFC [patch 22/34] PID Virtualization define vpid_to_pid functions Serge Hallyn
2006-01-17 14:33 ` RFC [patch 23/34] PID Virtualization Use " Serge Hallyn
2006-01-17 14:33 ` RFC [patch 24/34] PID Virtualization use vpgid_to_pgid function Serge Hallyn
2006-01-17 14:33 ` RFC [patch 25/34] PID Virtualization Context for pid_to_vpid conversition functions Serge Hallyn
2006-01-17 14:33 ` RFC [patch 26/34] PID Virtualization Documentation Serge Hallyn
2006-01-17 14:33 ` RFC [patch 27/34] PID Virtualization pidspace Serge Hallyn
2006-01-17 14:33 ` RFC [patch 28/34] PID Virtualization container object and functions Serge Hallyn
2006-01-17 14:33 ` RFC [patch 29/34] PID Virtualization container attach/detach calls Serge Hallyn
2006-01-17 14:33 ` Serge Hallyn [this message]
2006-01-17 14:33 ` RFC [patch 31/34] PID Virtualization Implementation of low level virtualization functions Serge Hallyn
2006-01-17 14:33 ` RFC [patch 32/34] PID Virtualization Handle special case vpid return cases Serge Hallyn
2006-01-17 14:33 ` RFC [patch 33/34] PID Virtualization per container /proc filesystem Serge Hallyn
2006-01-17 14:33 ` RFC [patch 34/34] PID Virtualization pidspace parent : signal behavior Serge Hallyn
2006-01-17 16:19 ` RFC [patch 00/34] PID Virtualization Overview Suleiman Souhlal
2006-01-17 17:08 ` Dave Hansen
2006-01-17 18:09 ` Suleiman Souhlal
2006-01-17 18:12 ` Dave Hansen
2006-01-17 18:29 ` Alan Cox
2006-01-18 19:01 ` Dave Hansen
2006-01-18 19:28 ` Arjan van de Ven
2006-01-18 19:38 ` Dave Hansen
2006-01-18 19:50 ` Arjan van de Ven
2006-01-18 22:54 ` Alan Cox
2006-01-19 7:15 ` Arjan van de Ven
2006-01-20 5:11 ` Eric W. Biederman
2006-01-20 20:23 ` Serge E. Hallyn
2006-01-20 20:33 ` Hubertus Franke
2006-01-21 10:34 ` Eric W. Biederman
2006-01-20 19:53 ` RFC: Multiple instances of kernel namespaces Eric W. Biederman
2006-01-20 20:13 ` Serge E. Hallyn
2006-01-20 20:22 ` Hubertus Franke
[not found] ` <20060120203555.GC13265@sergelap.austin.ibm.com>
2006-01-20 21:47 ` Hubertus Franke
2006-01-21 10:04 ` Eric W. Biederman
2006-01-26 19:47 ` Herbert Poetzl
2006-01-26 20:13 ` Eric W. Biederman
2006-01-26 20:27 ` Herbert Poetzl
2006-01-21 10:31 ` RFC [patch 00/34] PID Virtualization Overview Pavel Machek
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