OpenVZ Forum


Home » Mailing lists » Devel » [RFC][PATCH] UBC: user resource beancounters
[RFC][PATCH 7/7] UBC: proc interface [message #5202 is a reply to message #5192] Wed, 16 August 2006 15:42 Go to previous messageGo to previous message
dev is currently offline  dev
Messages: 1693
Registered: September 2005
Location: Moscow
Senior Member
Add proc interface (/proc/user_beancounters) allowing to see current
state (usage/limits/fails for each UB). Implemented via seq files.

Signed-Off-By: Pavel Emelianov <xemul@sw.ru>
Signed-Off-By: Kirill Korotaev <dev@sw.ru>

---
init/main.c | 1
kernel/ub/Makefile | 1
kernel/ub/proc.c | 205 +++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 207 insertions(+)

--- ./init/main.c.ubproc 2006-07-31 18:40:20.000000000 +0400
+++ ./init/main.c 2006-08-03 16:02:19.000000000 +0400
@@ -578,6 +578,7 @@ asmlinkage void __init start_kernel(void
page_writeback_init();
#ifdef CONFIG_PROC_FS
proc_root_init();
+ ub_init_proc();
#endif
cpuset_init();
taskstats_init_early();
--- ./kernel/ub/Makefile.ubproc 2006-07-31 17:49:05.000000000 +0400
+++ ./kernel/ub/Makefile 2006-08-01 11:08:39.000000000 +0400
@@ -4,3 +4,4 @@ obj-$(CONFIG_USER_RESOURCE) += beancount
obj-$(CONFIG_USER_RESOURCE) += misc.o
obj-y += sys.o
obj-$(CONFIG_USER_RESOURCE) += kmem.o
+obj-$(CONFIG_USER_RESOURCE) += proc.o
--- ./kernel/ub/proc.c.ubproc 2006-08-01 10:22:09.000000000 +0400
+++ ./kernel/ub/proc.c 2006-08-03 15:50:35.000000000 +0400
@@ -0,0 +1,205 @@
+/*
+ * kernel/ub/proc.c
+ *
+ * Copyright (C) 2006 OpenVZ. SWsoft Inc.
+ *
+ */
+
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+#include <ub/beancounter.h>
+
+#ifdef CONFIG_PROC_FS
+
+#if BITS_PER_LONG == 32
+static const char *head_fmt = "%10s %-12s %10s %10s %10s %10s %10s\n";
+static const char *res_fmt = "%10s %-12s %10lu %10lu %10lu %10lu %10lu\n";
+#else
+static const char *head_fmt = "%10s %-12s %20s %20s %20s %20s %20s\n";
+static const char *res_fmt = "%10s %-12s %20lu %20lu %20lu %20lu %20lu\n";
+#endif
+
+static void ub_show_header(struct seq_file *f)
+{
+ seq_printf(f, head_fmt, "uid", "resource",
+ "held", "maxheld", "barrier", "limit", "failcnt");
+}
+
+static void ub_show_res(struct seq_file *f, struct user_beancounter *ub, int r)
+{
+ char ub_uid[64];
+
+ if (r == 0)
+ ub_print_uid(ub, ub_uid, sizeof(ub_uid));
+ else
+ strcpy(ub_uid, "");
+
+ seq_printf(f, res_fmt, ub_uid, ub_rnames[r],
+ ub->ub_parms[r].held,
+ ub->ub_parms[r].maxheld,
+ ub->ub_parms[r].barrier,
+ ub->ub_parms[r].limit,
+ ub->ub_parms[r].failcnt);
+}
+
+static struct ub_seq_struct {
+ unsigned long flags;
+ int slot;
+ struct user_beancounter *ub;
+} ub_seq_ctx;
+
+static int ub_show(struct seq_file *f, void *v)
+{
+ int res;
+
+ for (res = 0; res < UB_RESOURCES; res++)
+ ub_show_res(f, ub_seq_ctx.ub, res);
+ return 0;
+}
+
+static void *ub_start_ctx(struct seq_file *f, unsigned long p, int sub)
+{
+ struct user_beancounter *ub;
+ struct hlist_node *pos;
+ unsigned long flags;
+ int slot;
+
+ if (p == 0)
+ ub_show_header(f);
+
+ spin_lock_irqsave(&ub_hash_lock, flags);
+ ub_seq_ctx.flags = flags;
+
+ for (slot = 0; slot < UB_HASH_SIZE; slot++)
+ hlist_for_each_entry (ub, pos, &ub_hash[slot], hash) {
+ if (!sub && ub->parent != NULL)
+ continue;
+
+ if (p-- == 0) {
+ ub_seq_ctx.ub = ub;
+ ub_seq_ctx.slot = slot;
+ return &ub_seq_ctx;
+ }
+ }
+
+ return NULL;
+}
+
+static void *ub_next_ctx(struct seq_file *f, loff_t *ppos, int sub)
+{
+ struct user_beancounter *ub;
+ struct hlist_node *pos;
+ int slot;
+
+ ub = ub_seq_ctx.ub;
+
+ pos = &ub->hash;
+ hlist_for_each_entry_continue (ub, pos, hash) {
+ if (!sub && ub->parent != NULL)
+ continue;
+
+ ub_seq_ctx.ub = ub;
+ (*ppos)++;
+ return &ub_seq_ctx;
+ }
+
+ for (slot = ub_seq_ctx.slot + 1; slot < UB_HASH_SIZE; slot++)
+ hlist_for_each_entry (ub, pos, &ub_hash[slot], hash) {
+ if (!sub && ub->parent != NULL)
+ continue;
+
+ ub_seq_ctx.ub = ub;
+ ub_seq_ctx.slot = slot;
+ (*ppos)++;
+ return &ub_seq_ctx;
+ }
+
+ return NULL;
+}
+
+static void *ub_start(struct seq_file *f, loff_t *ppos)
+{
+ return ub_start_ctx(f, *ppos, 0);
+}
+
+static void *ub_sub_start(struct seq_file *f, loff_t *ppos)
+{
+ return ub_start_ctx(f, *ppos, 1);
+}
+
+static void *ub_next(struct seq_file *f, void *v, loff_t *pos)
+{
+ return ub_next_ctx(f, pos, 0);
+}
+
+static void *ub_sub_next(struct seq_file *f, void *v, loff_t *pos)
+{
+ return ub_next_ctx(f, pos, 1);
+}
+
+static void ub_stop(struct seq_file *f, void *v)
+{
+ unsigned long flags;
+
+ flags = ub_seq_ctx.flags;
+ spin_unlock_irqrestore(&ub_hash_lock, flags);
+}
+
+static struct seq_operations ub_seq_ops = {
+ .start = ub_start,
+ .next = ub_next,
+ .stop = ub_stop,
+ .show = ub_show
+};
+
+static int ub_open(struct inode *inode, struct file *filp)
+{
+ return seq_open(filp, &ub_seq_ops);
+}
+
+static struct file_operations ub_file_operations = {
+ .open = ub_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static struct seq_operations ub_sub_seq_ops = {
+ .start = ub_sub_start,
+ .next = ub_sub_next,
+ .stop = ub_stop,
+ .show = ub_show
+};
+
+static int ub_sub_open(struct inode *inode, struct file *filp)
+{
+ return seq_open(filp, &ub_sub_seq_ops);
+}
+
+static struct file_operations ub_sub_file_operations = {
+ .open = ub_sub_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+void __init ub_init_proc(void)
+{
+ struct proc_dir_entry *entry;
+
+ entry = create_proc_entry("user_beancounters", S_IRUGO, NULL);
+ if (entry)
+ entry->proc_fops = &ub_file_operations;
+ else
+ panic("Can't create /proc/user_beancounters\n");
+
+ entry = create_proc_entry("user_beancounters_sub", S_IRUGO, NULL);
+ if (entry)
+ entry->proc_fops = &ub_sub_file_operations;
+ else
+ panic("Can't create /proc/user_beancounters_sub\n");
+}
+#endif

Report message to a moderator

[Message index]
 
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: [PATCH] vzlist: Fix "cast from pointer to integer of different size" warnings
Next Topic: [RFC][PATCH 1/2] add user namespace [try #2]
Goto Forum:
  

[ Syndicate this forum (XML) ] [ RSS ] [ PDF ]

Current Time: Sun Jul 06 10:37:54 GMT 2025

Total time taken to generate the page: 0.02646 seconds
Powered by FUDforum Powered by Virtuozzo Containers