[patch 06/38] CKRM e18: Classtype definitions for socket class

Gerrit Huizenga
2005-06-23T07:03:09Z

[-- Attachment #1: 06-diff_sockclass --]
[-- Type: text/plain, Size: 29522 bytes --]

This patch provides the extensions for CKRM to track per socket classes.
This is the base to enable socket based resource control for inbound
connection control, bandwidth control etc.

Signed-Off-By: Vivek Kashyap <vivk@us.ibm.com>
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-Off-By: Gerrit Huizenga <gh@us.ibm.com>

fs/rcfs/Makefile | 1
fs/rcfs/rootdir.c | 10
fs/rcfs/socket_fs.c | 280 +++++++++++++++++++++++
include/linux/ckrm_net.h | 42 +++
include/net/sock.h | 3
include/net/tcp.h | 4
init/Kconfig | 11
kernel/ckrm/Makefile | 1
kernel/ckrm/ckrm_sockc.c | 559 +++++++++++++++++++++++++++++++++++++++++++++++
net/ipv4/tcp_ipv4.c | 4
10 files changed, 914 insertions(+), 1 deletion(-)

Index: linux-2.6.12-ckrm1/fs/rcfs/Makefile
===================================================================
--- linux-2.6.12-ckrm1.orig/fs/rcfs/Makefile 2005-06-20 13:08:31.000000000 -0700
+++ linux-2.6.12-ckrm1/fs/rcfs/Makefile 2005-06-20 13:08:32.000000000 -0700
@@ -6,3 +6,4 @@ obj-$(CONFIG_RCFS_FS) += rcfs.o

rcfs-y := super.o inode.o dir.o rootdir.o magic.o
rcfs-$(CONFIG_CKRM_TYPE_TASKCLASS) += tc_magic.o
+rcfs-$(CONFIG_CKRM_TYPE_SOCKETCLASS) += socket_fs.o
Index: linux-2.6.12-ckrm1/fs/rcfs/rootdir.c
===================================================================
--- linux-2.6.12-ckrm1.orig/fs/rcfs/rootdir.c 2005-06-20 13:08:31.000000000 -0700
+++ linux-2.6.12-ckrm1/fs/rcfs/rootdir.c 2005-06-20 13:08:32.000000000 -0700
@@ -187,6 +187,10 @@ EXPORT_SYMBOL_GPL(rcfs_deregister_classt
extern struct rcfs_mfdesc tc_mfdesc;
#endif

+#ifdef CONFIG_CKRM_TYPE_SOCKETCLASS
+extern struct rcfs_mfdesc rcfs_sock_mfdesc;
+#endif
+
/* Common root and magic file entries.
* root name, root permissions, magic file names and magic file permissions
* are needed by all entities (classtypes and classification engines) existing
@@ -203,4 +207,10 @@ struct rcfs_mfdesc *genmfdesc[CKRM_MAX_C
#else
NULL,
#endif
+#ifdef CONFIG_CKRM_TYPE_SOCKETCLASS
+ &rcfs_sock_mfdesc,
+#else
+ NULL,
+#endif
+
};
Index: linux-2.6.12-ckrm1/fs/rcfs/socket_fs.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.12-ckrm1/fs/rcfs/socket_fs.c 2005-06-20 13:08:32.000000000 -0700
@@ -0,0 +1,280 @@
+/* ckrm_socketaq.c
+ *
+ * Copyright (C) Vivek Kashyap, IBM Corp. 2004
+ *
+ * Latest version, more details at http://ckrm.sf.net
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+/*******************************************************************************
+ * Socket class type
+ *
+ * Defines the root structure for socket based classes. Currently only inbound
+ * connection control is supported based on prioritized accept queues.
+ ******************************************************************************/
+
+#include <linux/rcfs.h>
+#include <net/tcp.h>
+
+extern int rcfs_create_noperm(struct inode *, struct dentry *, int,
+ struct nameidata *);
+extern int rcfs_symlink_noperm(struct inode *, struct dentry *, const char *);
+extern int rcfs_mkdir_noperm(struct inode *, struct dentry *, int);
+extern int rcfs_rmdir_noperm(struct inode *, struct dentry *);
+extern int rcfs_link_noperm(struct dentry *, struct inode *, struct dentry *);
+extern int rcfs_unlink_noperm(struct inode *, struct dentry *);
+extern int rcfs_mknod_noperm(struct inode *, struct dentry *, int mode, dev_t);
+
+extern int rcfs_rmdir(struct inode *, struct dentry *);
+extern int rcfs_unlink(struct inode *, struct dentry *);
+extern int rcfs_rename(struct inode *, struct dentry *, struct inode *,
+ struct dentry *);
+
+extern int rcfs_create_coredir(struct inode *, struct dentry *);
+
+int rcfs_sock_mkdir(struct inode *, struct dentry *, int mode);
+int rcfs_sock_rmdir(struct inode *, struct dentry *);
+struct inode_operations my_iops;
+struct inode_operations class_iops;
+struct inode_operations sub_iops;
+
+
+struct rcfs_magf def_magf = {
+ .mode = RCFS_DEFAULT_DIR_MODE,
+ .i_op = &sub_iops,
+ .i_fop = NULL,
+};
+
+struct rcfs_magf rcfs_sock_rootdesc[] = {
+ {
+ /* .name = should not be set, copy from classtype name, */
+ .mode = RCFS_DEFAULT_DIR_MODE,
+ .i_op = &my_iops,
+ /* .i_fop = &simple_dir_operations, */
+ .i_fop = NULL,
+ },
+ {
+ .name = "members",
+ .mode = RCFS_DEFAULT_FILE_MODE,
+ .i_op = &my_iops,
+ .i_fop = &members_fileops,
+ },
+ {
+ .name = "target",
+ .mode = RCFS_DEFAULT_FILE_MODE,
+ .i_op = &my_iops,
+ .i_fop = &target_fileops,
+ },
+ {
+ .name = "reclassify",
+ .mode = RCFS_DEFAULT_FILE_MODE,
+ .i_op = &my_iops,
+ .i_fop = &reclassify_fileops,
+ },
+};
+
+struct rcfs_magf rcfs_sock_magf[] = {
+ {
+ .name = "config",
+ .mode = RCFS_DEFAULT_FILE_MODE,
+ .i_op = &my_iops,
+ .i_fop = &config_fileops,
+ },
+ {
+ .name = "members",
+ .mode = RCFS_DEFAULT_FILE_MODE,
+ .i_op = &my_iops,
+ .i_fop = &members_fileops,
+ },
+ {
+ .name = "shares",
+ .mode = RCFS_DEFAULT_FILE_MODE,
+ .i_op = &my_iops,
+ .i_fop = &shares_fileops,
+ },
+ {
+ .name = "stats",
+ .mode = RCFS_DEFAULT_FILE_MODE,
+ .i_op = &my_iops,
+ .i_fop = &stats_fileops,
+ },
+ {
+ .name = "target",
+ .mode = RCFS_DEFAULT_FILE_MODE,
+ .i_op = &my_iops,
+ .i_fop = &target_fileops,
+ },
+};
+
+struct rcfs_magf sub_magf[] = {
+ {
+ .name = "config",
+ .mode = RCFS_DEFAULT_FILE_MODE,
+ .i_op = &my_iops,
+ .i_fop = &config_fileops,
+ },
+ {
+ .name = "shares",
+ .mode = RCFS_DEFAULT_FILE_MODE,
+ .i_op = &my_iops,
+ .i_fop = &shares_fileops,
+ },
+ {
+ .name = "stats",
+ .mode = RCFS_DEFAULT_FILE_MODE,
+ .i_op = &my_iops,
+ .i_fop = &stats_fileops,
+ },
+};
+
+struct rcfs_mfdesc rcfs_sock_mfdesc = {
+ .rootmf = rcfs_sock_rootdesc,
+ .rootmflen = (sizeof(rcfs_sock_rootdesc) / sizeof(struct rcfs_magf)),
+};
+
+#define SOCK_MAX_MAGF (sizeof(rcfs_sock_magf)/sizeof(struct rcfs_magf))
+#define LAQ_MAX_SUBMAGF (sizeof(sub_magf)/sizeof(struct rcfs_magf))
+
+int rcfs_sock_rmdir(struct inode *p, struct dentry *me)
+{
+ struct dentry *mftmp, *mfdentry;
+ int ret = 0;
+
+ /* delete all magic sub directories */
+ list_for_each_entry_safe(mfdentry, mftmp, &me->d_subdirs, d_child) {
+ if (S_ISDIR(mfdentry->d_inode->i_mode)) {
+ ret = rcfs_rmdir(me->d_inode, mfdentry);
+ if (ret)
+ return ret;
+ }
+ }
+ /* delete ourselves */
+ ret = rcfs_rmdir(p, me);
+
+ return ret;
+}
+
+#ifdef NUM_ACCEPT_QUEUES
+#define LAQ_NUM_ACCEPT_QUEUES NUM_ACCEPT_QUEUES
+#else
+#define LAQ_NUM_ACCEPT_QUEUES 0
+#endif
+
+int rcfs_sock_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+{
+ int retval = 0;
+ int i, j;
+ struct dentry *pentry, *mfdentry;
+
+ if (rcfs_mknod(dir, dentry, mode | S_IFDIR, 0)) {
+ printk(KERN_ERR "rcfs_sock_mkdir: error reaching parent\n");
+ return retval;
+ }
+ /* Needed if only rcfs_mknod is used instead of i_op->mkdir */
+ dir->i_nlink++;
+
+ retval = rcfs_create_coredir(dir, dentry);
+ if (retval)
+ goto mkdir_err;
+
+ /* create the default set of magic files */
+ for (i = 0; i < SOCK_MAX_MAGF; i++) {
+ mfdentry = rcfs_create_internal(dentry, &rcfs_sock_magf[i], 0);
+ mfdentry->d_fsdata = &RCFS_IS_MAGIC;
+ rcfs_get_inode_info(mfdentry->d_inode)->core =
+ rcfs_get_inode_info(dentry->d_inode)->core;
+ rcfs_get_inode_info(mfdentry->d_inode)->mfdentry = mfdentry;
+ if (rcfs_sock_magf[i].i_fop)
+ mfdentry->d_inode->i_fop = rcfs_sock_magf[i].i_fop;
+ if (rcfs_sock_magf[i].i_op)
+ mfdentry->d_inode->i_op = rcfs_sock_magf[i].i_op;
+ }
+
+ for (i = 1; i < LAQ_NUM_ACCEPT_QUEUES; i++) {
+ j = sprintf(def_magf.name, "%d", i);
+ def_magf.name[j] = '\0';
+
+ pentry = rcfs_create_internal(dentry, &def_magf, 0);
+ retval = rcfs_create_coredir(dentry->d_inode, pentry);
+ if (retval)
+ goto mkdir_err;
+ pentry->d_fsdata = &RCFS_IS_MAGIC;
+ for (j = 0; j < LAQ_MAX_SUBMAGF; j++) {
+ mfdentry =
+ rcfs_create_internal(pentry, &sub_magf[j], 0);
+ mfdentry->d_fsdata = &RCFS_IS_MAGIC;
+ rcfs_get_inode_info(mfdentry->d_inode)->core =
+ rcfs_get_inode_info(pentry->d_inode)->core;
+ rcfs_get_inode_info(mfdentry->d_inode)->mfdentry =
+ mfdentry;
+ if (sub_magf[j].i_fop)
+ mfdentry->d_inode->i_fop = sub_magf[j].i_fop;
+ if (sub_magf[j].i_op)
+ mfdentry->d_inode->i_op = sub_magf[j].i_op;
+ }
+ pentry->d_inode->i_op = &sub_iops;
+ }
+ dentry->d_inode->i_op = &class_iops;
+ return 0;
+
+ mkdir_err:
+ /* Needed */
+ dir->i_nlink--;
+ return retval;
+}
+
+char *rcfs_sock_get_name(struct ckrm_core_class *c)
+{
+ char *p = (char *)c->name;
+
+ while (*p)
+ p++;
+ while (*p != '/' && p != c->name)
+ p--;
+
+ return ++p;
+}
+
+
+
+struct inode_operations my_iops = {
+ .create = rcfs_create_noperm,
+ .lookup = simple_lookup,
+ .link = rcfs_link_noperm,
+ .unlink = rcfs_unlink,
+ .symlink = rcfs_symlink_noperm,
+ .mkdir = rcfs_sock_mkdir,
+ .rmdir = rcfs_sock_rmdir,
+ .mknod = rcfs_mknod_noperm,
+ .rename = rcfs_rename,
+};
+
+struct inode_operations class_iops = {
+ .create = rcfs_create_noperm,
+ .lookup = simple_lookup,
+ .link = rcfs_link_noperm,
+ .unlink = rcfs_unlink_noperm,
+ .symlink = rcfs_symlink_noperm,
+ .mkdir = rcfs_mkdir_noperm,
+ .rmdir = rcfs_rmdir_noperm,
+ .mknod = rcfs_mknod_noperm,
+ .rename = rcfs_rename,
+};
+
+struct inode_operations sub_iops = {
+ .create = rcfs_create_noperm,
+ .lookup = simple_lookup,
+ .link = rcfs_link_noperm,
+ .unlink = rcfs_unlink_noperm,
+ .symlink = rcfs_symlink_noperm,
+ .mkdir = rcfs_mkdir_noperm,
+ .rmdir = rcfs_rmdir_noperm,
+ .mknod = rcfs_mknod_noperm,
+ .rename = rcfs_rename,
+};
+
Index: linux-2.6.12-ckrm1/include/linux/ckrm_net.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.12-ckrm1/include/linux/ckrm_net.h 2005-06-20 13:08:32.000000000 -0700
@@ -0,0 +1,42 @@
+/* ckrm_rc.h - Header file to be used by Resource controllers of CKRM
+ *
+ * Copyright (C) Vivek Kashyap , IBM Corp. 2004
+ *
+ * Provides data structures, macros and kernel API of CKRM for
+ * resource controllers.
+ *
+ * Latest version, more details at http://ckrm.sf.net
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#ifndef _LINUX_CKRM_NET_H
+#define _LINUX_CKRM_NET_H
+
+struct ckrm_sock_class;
+
+struct ckrm_net_struct {
+ int ns_type; /* type of net class */
+ struct sock *ns_sk; /* pointer to socket */
+ pid_t ns_tgid; /* real process id */
+ pid_t ns_pid; /* calling thread's pid */
+ struct task_struct *ns_tsk;
+ int ns_family; /* IPPROTO_IPV4 || IPPROTO_IPV6 */
+ /* Currently only IPV4 is supported */
+ union {
+ __u32 ns_dipv4; /* V4 listener's address */
+ } ns_daddr;
+ __u16 ns_dport; /* listener's port */
+ __u16 ns_sport; /* sender's port */
+ atomic_t ns_refcnt;
+ struct ckrm_sock_class *core;
+ struct list_head ckrm_link;
+};
+
+#define ns_daddrv4 ns_daddr.ns_dipv4
+
+#endif
Index: linux-2.6.12-ckrm1/include/net/sock.h
===================================================================
--- linux-2.6.12-ckrm1.orig/include/net/sock.h 2005-06-17 12:48:29.000000000 -0700
+++ linux-2.6.12-ckrm1/include/net/sock.h 2005-06-20 13:08:32.000000000 -0700
@@ -112,6 +112,8 @@ struct sock_common {
atomic_t skc_refcnt;
};

+struct ckrm_net_struct;
+
/**
* struct sock - network layer representation of sockets
* @__sk_common: shared layout with tcp_tw_bucket
@@ -236,6 +238,7 @@ struct sock {
struct timeval sk_stamp;
struct socket *sk_socket;
void *sk_user_data;
+ struct ckrm_net_struct *sk_ckrm_ns;
struct page *sk_sndmsg_page;
struct sk_buff *sk_send_head;
__u32 sk_sndmsg_off;
Index: linux-2.6.12-ckrm1/include/net/tcp.h
===================================================================
--- linux-2.6.12-ckrm1.orig/include/net/tcp.h 2005-06-17 12:48:29.000000000 -0700
+++ linux-2.6.12-ckrm1/include/net/tcp.h 2005-06-20 13:08:32.000000000 -0700
@@ -800,6 +800,7 @@ extern int tcp_rcv_established(struct

extern void tcp_rcv_space_adjust(struct sock *sk);

+
enum tcp_ack_state_t
{
TCP_ACK_SCHED = 1,
@@ -930,6 +931,9 @@ extern void tcp_unhash(struct sock *sk

extern int tcp_v4_hash_connecting(struct sock *sk);

+extern struct sock * tcp_v4_lookup_listener(u32 daddr,
+ unsigned short hnum,
+ int dif);

/* From syncookies.c */
extern struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
Index: linux-2.6.12-ckrm1/init/Kconfig
===================================================================
--- linux-2.6.12-ckrm1.orig/init/Kconfig 2005-06-20 13:08:31.000000000 -0700
+++ linux-2.6.12-ckrm1/init/Kconfig 2005-06-20 13:08:32.000000000 -0700
@@ -182,6 +182,17 @@ config CKRM_TYPE_TASKCLASS

Say Y if unsure

+config CKRM_TYPE_SOCKETCLASS
+ bool "Class Manager for socket groups"
+ depends on CKRM && RCFS_FS
+ default y
+ help
+ SOCKET provides the extensions for CKRM to track per socket
+ classes. This is the base to enable socket based resource
+ control for inbound connection control, bandwidth control etc.
+
+ Say Y if unsure.
+
endmenu

config SYSCTL
Index: linux-2.6.12-ckrm1/kernel/ckrm/ckrm_sockc.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.12-ckrm1/kernel/ckrm/ckrm_sockc.c 2005-06-20 13:08:32.000000000 -0700
@@ -0,0 +1,559 @@
+/* ckrm_sock.c - Class-based Kernel Resource Management (CKRM)
+ *
+ * Copyright (C) Hubertus Franke, IBM Corp. 2003,2004
+ * (C) Shailabh Nagar, IBM Corp. 2003
+ * (C) Chandra Seetharaman, IBM Corp. 2003
+ * (C) Vivek Kashyap, IBM Corp. 2004
+ *
+ *
+ * Provides kernel API of CKRM for in-kernel,per-resource controllers
+ * (one each for cpu, memory, io, network) and callbacks for
+ * classification modules.
+ *
+ * Latest version, more details at http://ckrm.sf.net
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <asm/uaccess.h>
+#include <linux/mm.h>
+#include <asm/errno.h>
+#include <linux/string.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/module.h>
+#include <linux/ckrm_rc.h>
+#include <linux/parser.h>
+#include <net/tcp.h>
+
+#include <linux/ckrm_net.h>
+
+struct ckrm_sock_class {
+ struct ckrm_core_class core;
+};
+
+static struct ckrm_sock_class ckrm_sockclass_dflt_class = {
+};
+
+#define SOCKET_CLASS_TYPE_NAME "socketclass"
+
+const char *dflt_sockclass_name = SOCKET_CLASS_TYPE_NAME;
+
+static struct ckrm_core_class *ckrm_sock_alloc_class(struct ckrm_core_class *parent,
+ const char *name);
+static int ckrm_sock_free_class(struct ckrm_core_class *core);
+
+static int ckrm_sock_forced_reclassify(struct ckrm_core_class * target,
+ const char *resname);
+static int ckrm_sock_show_members(struct ckrm_core_class *core,
+ struct seq_file *seq);
+static void ckrm_sock_add_resctrl(struct ckrm_core_class *core, int resid);
+static void ckrm_sock_reclassify_class(struct ckrm_sock_class *cls);
+
+struct ckrm_classtype ct_sockclass = {
+ .mfidx = 1,
+ .name = SOCKET_CLASS_TYPE_NAME,
+ .type_id = CKRM_CLASSTYPE_SOCKET_CLASS,
+ .maxdepth = 3,
+ .resid_reserved = 0,
+ .max_res_ctlrs = CKRM_MAX_RES_CTLRS,
+ .max_resid = 0,
+ .bit_res_ctlrs = 0L,
+ .res_ctlrs_lock = SPIN_LOCK_UNLOCKED,
+ .classes = LIST_HEAD_INIT(ct_sockclass.classes),
+
+ .default_class = &ckrm_sockclass_dflt_class.core,
+
+ /* private version of functions */
+ .alloc = &ckrm_sock_alloc_class,
+ .free = &ckrm_sock_free_class,
+ .show_members = &ckrm_sock_show_members,
+ .forced_reclassify = &ckrm_sock_forced_reclassify,
+
+ /* use of default functions */
+ .show_shares = &ckrm_class_show_shares,
+ .show_stats = &ckrm_class_show_stats,
+ .show_config = &ckrm_class_show_config,
+ .set_config = &ckrm_class_set_config,
+ .set_shares = &ckrm_class_set_shares,
+ .reset_stats = &ckrm_class_reset_stats,
+
+ /* Mandatory private version. No default available */
+ .add_resctrl = &ckrm_sock_add_resctrl,
+};
+
+/* helper functions */
+
+void ckrm_ns_hold(struct ckrm_net_struct *ns)
+{
+ atomic_inc(&ns->ns_refcnt);
+ return;
+}
+
+void ckrm_ns_put(struct ckrm_net_struct *ns)
+{
+ if (atomic_dec_and_test(&ns->ns_refcnt))
+ kfree(ns);
+ return;
+}
+
+/*
+ * Change the class of a netstruct
+ *
+ * Change the task's task class to "newcls" if the task's current
+ * class (task->taskclass) is same as given "oldcls", if it is non-NULL.
+ *
+ */
+
+static void
+ckrm_sock_set_class(struct ckrm_net_struct *ns, struct ckrm_sock_class *newcls,
+ struct ckrm_sock_class *oldcls, enum ckrm_event event)
+{
+ int i;
+ struct ckrm_res_ctlr *rcbs;
+ struct ckrm_classtype *clstype;
+ void *old_res_class, *new_res_class;
+
+ if ((newcls == oldcls) || (newcls == NULL)) {
+ ns->core = (void *)oldcls;
+ return;
+ }
+
+ class_lock(class_core(newcls));
+ ns->core = newcls;
+ list_add(&ns->ckrm_link, &class_core(newcls)->objlist);
+ class_unlock(class_core(newcls));
+
+ clstype = class_isa(newcls);
+ for (i = 0; i < clstype->max_resid; i++) {
+ atomic_inc(&clstype->nr_resusers[i]);
+ old_res_class =
+ oldcls ? class_core(oldcls)->res_class[i] : NULL;
+ new_res_class =
+ newcls ? class_core(newcls)->res_class[i] : NULL;
+ rcbs = clstype->res_ctlrs[i];
+ if (rcbs && rcbs->change_resclass
+ && (old_res_class != new_res_class))
+ (*rcbs->change_resclass) (ns, old_res_class,
+ new_res_class);
+ atomic_dec(&clstype->nr_resusers[i]);
+ }
+ return;
+}
+
+static void ckrm_sock_add_resctrl(struct ckrm_core_class *core, int resid)
+{
+ struct ckrm_net_struct *ns;
+ struct ckrm_res_ctlr *rcbs;
+
+ if ((resid < 0) || (resid >= CKRM_MAX_RES_CTLRS)
+ || ((rcbs = core->classtype->res_ctlrs[resid]) == NULL))
+ return;
+
+ class_lock(core);
+ list_for_each_entry(ns, &core->objlist, ckrm_link) {
+ if (rcbs->change_resclass)
+ (*rcbs->change_resclass) (ns, NULL,
+ core->res_class[resid]);
+ }
+ class_unlock(core);
+}
+
+/**************************************************************************
+ * Functions called from classification points *
+ **************************************************************************/
+
+static void cb_sockclass_listen_start(struct sock *sk)
+{
+ struct ckrm_net_struct *ns = NULL;
+ struct ckrm_sock_class *newcls = NULL;
+ struct ckrm_res_ctlr *rcbs;
+ struct ckrm_classtype *clstype;
+ int i = 0;
+
+ /* XXX - TBD ipv6 */
+ if (sk->sk_family == AF_INET6)
+ return;
+
+ /* to store the socket address */
+ ns = (struct ckrm_net_struct *)
+ kmalloc(sizeof(struct ckrm_net_struct), GFP_ATOMIC);
+ if (!ns)
+ return;
+
+ memset(ns, 0, sizeof(*ns));
+ INIT_LIST_HEAD(&ns->ckrm_link);
+ ckrm_ns_hold(ns);
+
+ ns->ns_family = sk->sk_family;
+ if (ns->ns_family == AF_INET6) // IPv6 not supported yet.
+ return;
+
+ ns->ns_daddrv4 = inet_sk(sk)->rcv_saddr;
+ ns->ns_dport = inet_sk(sk)->num;
+
+ ns->ns_pid = current->pid;
+ ns->ns_tgid = current->tgid;
+ ns->ns_tsk = current;
+ ce_protect(&ct_sockclass);
+ CE_CLASSIFY_RET(newcls, &ct_sockclass, CKRM_EVENT_LISTEN_START, ns,
+ current);
+ ce_release(&ct_sockclass);
+
+ if (newcls == NULL) {
+ newcls = &ckrm_sockclass_dflt_class;
+ ckrm_core_grab(class_core(newcls));
+ }
+
+ class_lock(class_core(newcls));
+ list_add(&ns->ckrm_link, &class_core(newcls)->objlist);
+ ns->core = newcls;
+ class_unlock(class_core(newcls));
+
+ /*
+ * the socket is already locked
+ * take a reference on socket on our behalf
+ */
+ sock_hold(sk);
+ sk->sk_ckrm_ns = (void *)ns;
+ ns->ns_sk = sk;
+
+ /* modify its shares */
+ clstype = class_isa(newcls);
+ for (i = 0; i < clstype->max_resid; i++) {
+ atomic_inc(&clstype->nr_resusers[i]);
+ rcbs = clstype->res_ctlrs[i];
+ if (rcbs && rcbs->change_resclass) {
+ (*rcbs->change_resclass) ((void *)ns,
+ NULL,
+ class_core(newcls)->
+ res_class[i]);
+ }
+ atomic_dec(&clstype->nr_resusers[i]);
+ }
+ return;
+}
+
+static void cb_sockclass_listen_stop(struct sock *sk)
+{
+ struct ckrm_net_struct *ns = NULL;
+ struct ckrm_sock_class *newcls = NULL;
+
+ /* XXX - TBD ipv6 */
+ if (sk->sk_family == AF_INET6)
+ return;
+
+ ns = (struct ckrm_net_struct *)sk->sk_ckrm_ns;
+ if (!ns) /* listen_start called before socket_aq was loaded */
+ return;
+
+ newcls = ns->core;
+ if (newcls) {
+ class_lock(class_core(newcls));
+ list_del(&ns->ckrm_link);
+ INIT_LIST_HEAD(&ns->ckrm_link);
+ class_unlock(class_core(newcls));
+ ckrm_core_drop(class_core(newcls));
+ }
+ /* the socket is already locked */
+ sk->sk_ckrm_ns = NULL;
+ sock_put(sk);
+
+ // Should be the last count and free it
+ ckrm_ns_put(ns);
+ return;
+}
+
+static struct ckrm_event_spec ckrm_sock_events_callbacks[] = {
+ {CKRM_EVENT_LISTEN_START, {cb_sockclass_listen_start, NULL}},
+ {CKRM_EVENT_LISTEN_STOP, {cb_sockclass_listen_stop, NULL}},
+ {-1, {NULL, NULL}}
+};
+
+/**************************************************************************
+ * Class Object Creation / Destruction
+ **************************************************************************/
+
+static struct ckrm_core_class *ckrm_sock_alloc_class(struct ckrm_core_class *parent,
+ const char *name)
+{
+ struct ckrm_sock_class *sockcls;
+ sockcls = kmalloc(sizeof(struct ckrm_sock_class), GFP_KERNEL);
+ if (sockcls == NULL)
+ return NULL;
+ memset(sockcls, 0, sizeof(struct ckrm_sock_class));
+
+ ckrm_init_core_class(&ct_sockclass, class_core(sockcls), parent, name);
+
+ ce_protect(&ct_sockclass);
+ if (ct_sockclass.ce_cb_active && ct_sockclass.ce_callbacks.class_add)
+ (*ct_sockclass.ce_callbacks.class_add) (name, sockcls,
+ ct_sockclass.type_id);
+ ce_release(&ct_sockclass);
+
+ return class_core(sockcls);
+}
+
+static int ckrm_sock_free_class(struct ckrm_core_class *core)
+{
+ struct ckrm_sock_class *sockcls;
+
+ if (!ckrm_is_core_valid(core)) {
+ /* Invalid core */
+ return (-EINVAL);
+ }
+ if (core == core->classtype->default_class) {
+ /* reset the name tag */
+ core->name = dflt_sockclass_name;
+ return 0;
+ }
+
+ sockcls = class_type(struct ckrm_sock_class, core);
+
+ ce_protect(&ct_sockclass);
+
+ if (ct_sockclass.ce_cb_active && ct_sockclass.ce_callbacks.class_delete)
+ (*ct_sockclass.ce_callbacks.class_delete) (core->name, sockcls,
+ ct_sockclass.type_id);
+
+ ckrm_sock_reclassify_class(sockcls);
+
+ ce_release(&ct_sockclass);
+
+ ckrm_release_core_class(core);
+ /* Could just drop the class? Error message? */
+
+ return 0;
+}
+
+static int ckrm_sock_show_members(struct ckrm_core_class *core, struct seq_file *seq)
+{
+ struct list_head *lh;
+ struct ckrm_net_struct *ns = NULL;
+
+ class_lock(core);
+ list_for_each(lh, &core->objlist) {
+ ns = container_of(lh, struct ckrm_net_struct, ckrm_link);
+ seq_printf(seq, "%d.%d.%d.%d\\%d\n",
+ NIPQUAD(ns->ns_daddrv4), ns->ns_dport);
+ }
+ class_unlock(core);
+
+ return 0;
+}
+
+static int
+ckrm_sock_forced_reclassify_ns(struct ckrm_net_struct *tns,
+ struct ckrm_core_class *core)
+{
+ struct ckrm_net_struct *ns = NULL;
+ struct sock *sk = NULL;
+ struct ckrm_sock_class *oldcls, *newcls;
+ int rc = -EINVAL;
+
+ if (!ckrm_is_core_valid(core)) {
+ return rc;
+ }
+
+ newcls = class_type(struct ckrm_sock_class, core);
+ /*
+ * lookup the listening sockets
+ * returns with a reference count set on socket
+ */
+ if (tns->ns_family == AF_INET6)
+ return -EOPNOTSUPP;
+
+ sk = tcp_v4_lookup_listener(tns->ns_daddrv4, tns->ns_dport, 0);
+ if (!sk) {
+ printk(KERN_INFO "No such listener 0x%x:%d\n",
+ tns->ns_daddrv4, tns->ns_dport);
+ return rc;
+ }
+ lock_sock(sk);
+ if (!sk->sk_ckrm_ns) {
+ goto out;
+ }
+ ns = sk->sk_ckrm_ns;
+ ckrm_ns_hold(ns);
+ if (!capable(CAP_NET_ADMIN) && (ns->ns_tsk->user != current->user)) {
+ ckrm_ns_put(ns);
+ rc = -EPERM;
+ goto out;
+ }
+
+ oldcls = ns->core;
+ if ((oldcls == NULL) || (oldcls == newcls)) {
+ ckrm_ns_put(ns);
+ goto out;
+ }
+ /* remove the net_struct from the current class */
+ class_lock(class_core(oldcls));
+ list_del(&ns->ckrm_link);
+ INIT_LIST_HEAD(&ns->ckrm_link);
+ ns->core = NULL;
+ class_unlock(class_core(oldcls));
+
+ ckrm_sock_set_class(ns, newcls, oldcls, CKRM_EVENT_MANUAL);
+ ckrm_ns_put(ns);
+ rc = 0;
+ out:
+ release_sock(sk);
+ sock_put(sk);
+
+ return rc;
+
+}
+
+enum ckrm_sock_target_token {
+ IPV4, IPV6, SOCKC_TARGET_ERR
+};
+
+static match_table_t ckrm_sock_target_tokens = {
+ {IPV4, "ipv4=%s"},
+ {IPV6, "ipv6=%s"},
+ {SOCKC_TARGET_ERR, NULL},
+};
+
+char *v4toi(char *s, char c, __u32 * v)
+{
+ unsigned int k = 0, n = 0;
+
+ while (*s && (*s != c)) {
+ if (*s == '.') {
+ n <<= 8;
+ n |= k;
+ k = 0;
+ } else
+ k = k * 10 + *s - '0';
+ s++;
+ }
+
+ n <<= 8;
+ *v = n | k;
+
+ return s;
+}
+
+static int
+ckrm_sock_forced_reclassify(struct ckrm_core_class *target, const char *options)
+{
+ char *p, *p2;
+ struct ckrm_net_struct ns;
+ __u32 v4addr, tmp;
+
+ if (!options)
+ return -EINVAL;
+
+ if (target == NULL) {
+ unsigned long id = simple_strtol(options,NULL,0);
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ if (id != 0)
+ return -EINVAL;
+ printk("ckrm_sock_class: reclassify all not net implemented\n");
+ return 0;
+ }
+
+ while ((p = strsep((char **)&options, ",")) != NULL) {
+ substring_t args[MAX_OPT_ARGS];
+ int token;
+
+ if (!*p)
+ continue;
+ token = match_token(p, ckrm_sock_target_tokens, args);
+ switch (token) {
+
+ case IPV4:
+
+ p2 = p;
+ while (*p2 && (*p2 != '='))
+ ++p2;
+ p2++;
+ p2 = v4toi(p2, '\\', &(v4addr));
+ ns.ns_daddrv4 = htonl(v4addr);
+ ns.ns_family = AF_INET;
+ p2 = v4toi(++p2, ':', &tmp);
+ ns.ns_dport = (__u16) tmp;
+ if (*p2)
+ p2 = v4toi(++p2, '\0', &ns.ns_pid);
+ ckrm_sock_forced_reclassify_ns(&ns, target);
+ break;
+
+ case IPV6:
+ printk(KERN_INFO "rcfs: IPV6 not supported yet\n");
+ return -ENOSYS;
+ default:
+ return -EINVAL;
+ }
+ }
+ return -EINVAL;
+}
+
+/*
+ * Listen_aq reclassification.
+ */
+static void ckrm_sock_reclassify_class(struct ckrm_sock_class *cls)
+{
+ struct ckrm_net_struct *ns, *tns;
+ struct ckrm_core_class *core = class_core(cls);
+ LIST_HEAD(local_list);
+
+ if (!cls)
+ return;
+
+ if (!ckrm_validate_and_grab_core(core))
+ return;
+
+ class_lock(core);
+ /* we have the core refcnt */
+ if (list_empty(&core->objlist)) {
+ class_unlock(core);
+ ckrm_core_drop(core);
+ return;
+ }
+
+ INIT_LIST_HEAD(&local_list);
+ list_splice_init(&core->objlist, &local_list);
+ class_unlock(core);
+ ckrm_core_drop(core);
+
+ list_for_each_entry_safe(ns, tns, &local_list, ckrm_link) {
+ ckrm_ns_hold(ns);
+ list_del(&ns->ckrm_link);
+ if (ns->ns_sk) {
+ lock_sock(ns->ns_sk);
+ ckrm_sock_set_class(ns, &ckrm_sockclass_dflt_class, NULL,
+ CKRM_EVENT_MANUAL);
+ release_sock(ns->ns_sk);
+ }
+ ckrm_ns_put(ns);
+ }
+ return;
+}
+
+void __init ckrm_meta_init_sockclass(void)
+{
+ printk("...... Initializing ClassType<%s> ........\n",
+ ct_sockclass.name);
+ /* intialize the default class */
+ ckrm_init_core_class(&ct_sockclass, class_core(&ckrm_sockclass_dflt_class),
+ NULL, dflt_sockclass_name);
+
+ /* register classtype and initialize default task class */
+ ckrm_register_classtype(&ct_sockclass);
+ ckrm_register_event_set(ckrm_sock_events_callbacks);
+
+ /*
+ * note registeration of all resource controllers will be done
+ * later dynamically as these are specified as modules
+ */
+}
Index: linux-2.6.12-ckrm1/kernel/ckrm/Makefile
===================================================================
--- linux-2.6.12-ckrm1.orig/kernel/ckrm/Makefile 2005-06-20 13:08:31.000000000 -0700
+++ linux-2.6.12-ckrm1/kernel/ckrm/Makefile 2005-06-20 13:08:32.000000000 -0700
@@ -4,3 +4,4 @@

obj-y += ckrm_events.o ckrm.o ckrmutils.o
obj-$(CONFIG_CKRM_TYPE_TASKCLASS) += ckrm_tc.o
+obj-$(CONFIG_CKRM_TYPE_SOCKETCLASS) += ckrm_sockc.o
Index: linux-2.6.12-ckrm1/net/ipv4/tcp_ipv4.c
===================================================================
--- linux-2.6.12-ckrm1.orig/net/ipv4/tcp_ipv4.c 2005-06-17 12:48:29.000000000 -0700
+++ linux-2.6.12-ckrm1/net/ipv4/tcp_ipv4.c 2005-06-20 13:08:32.000000000 -0700
@@ -451,7 +451,8 @@ static struct sock *__tcp_v4_lookup_list
}

/* Optimize the common listener case. */
-static inline struct sock *tcp_v4_lookup_listener(u32 daddr,
+/* XXX: Was inline - need to use for CKRM, fix before next release */
+struct sock *tcp_v4_lookup_listener(u32 daddr,
unsigned short hnum, int dif)
{
struct sock *sk = NULL;
@@ -2648,6 +2649,7 @@ EXPORT_SYMBOL(tcp_prot);
EXPORT_SYMBOL(tcp_put_port);
EXPORT_SYMBOL(tcp_unhash);
EXPORT_SYMBOL(tcp_v4_conn_request);
+EXPORT_SYMBOL(tcp_v4_lookup_listener);
EXPORT_SYMBOL(tcp_v4_connect);
EXPORT_SYMBOL(tcp_v4_do_rcv);
EXPORT_SYMBOL(tcp_v4_rebuild_header);

--