Messages in this thread Patch in this message | | | From | Chandra Seetharaman <> | Date | Thu, 27 Apr 2006 18:34:43 -0700 | Subject | [PATCH 06/12] Add proc interface to get resource group info of task |
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06/12: task_procsupport
Adds an interface in /proc to get the name of a resource group to which a task is attached. --
Signed-Off-By: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: MAEDA Naoaki <maeda.naoaki@jp.fujitsu.com>
fs/proc/base.c | 19 +++++++++++++++++++ include/linux/res_group.h | 2 ++ kernel/res_group/task.c | 32 +++++++++++++++++++++++++++++++- 3 files changed, 52 insertions(+), 1 deletion(-)
Index: linux-2617-rc3/fs/proc/base.c =================================================================== --- linux-2617-rc3.orig/fs/proc/base.c 2006-04-27 09:18:03.000000000 -0700 +++ linux-2617-rc3/fs/proc/base.c 2006-04-27 09:22:27.000000000 -0700 @@ -70,6 +70,7 @@ #include <linux/ptrace.h> #include <linux/seccomp.h> #include <linux/cpuset.h> +#include <linux/res_group.h> #include <linux/audit.h> #include <linux/poll.h> #include "internal.h" @@ -115,6 +116,9 @@ enum pid_directory_inos { #ifdef CONFIG_CPUSETS PROC_TGID_CPUSET, #endif +#ifdef CONFIG_RES_GROUPS + PROC_TGID_RES_GROUP, +#endif #ifdef CONFIG_SECURITY PROC_TGID_ATTR, PROC_TGID_ATTR_CURRENT, @@ -156,6 +160,9 @@ enum pid_directory_inos { #ifdef CONFIG_CPUSETS PROC_TID_CPUSET, #endif +#ifdef CONFIG_RES_GROUPS + PROC_TID_RES_GROUP, +#endif #ifdef CONFIG_SECURITY PROC_TID_ATTR, PROC_TID_ATTR_CURRENT, @@ -219,6 +226,9 @@ static struct pid_entry tgid_base_stuff[ #ifdef CONFIG_CPUSETS E(PROC_TGID_CPUSET, "cpuset", S_IFREG|S_IRUGO), #endif +#ifdef CONFIG_RES_GROUPS + E(PROC_TGID_RES_GROUP,"res_group",S_IFREG|S_IRUGO), +#endif E(PROC_TGID_OOM_SCORE, "oom_score",S_IFREG|S_IRUGO), E(PROC_TGID_OOM_ADJUST,"oom_adj", S_IFREG|S_IRUGO|S_IWUSR), #ifdef CONFIG_AUDITSYSCALL @@ -261,6 +271,9 @@ static struct pid_entry tid_base_stuff[] #ifdef CONFIG_CPUSETS E(PROC_TID_CPUSET, "cpuset", S_IFREG|S_IRUGO), #endif +#ifdef CONFIG_RES_GROUPS + E(PROC_TID_RES_GROUP, "res_group",S_IFREG|S_IRUGO), +#endif E(PROC_TID_OOM_SCORE, "oom_score",S_IFREG|S_IRUGO), E(PROC_TID_OOM_ADJUST, "oom_adj", S_IFREG|S_IRUGO|S_IWUSR), #ifdef CONFIG_AUDITSYSCALL @@ -1823,6 +1836,12 @@ static struct dentry *proc_pident_lookup inode->i_fop = &proc_cpuset_operations; break; #endif +#ifdef CONFIG_RES_GROUPS + case PROC_TID_RES_GROUP: + case PROC_TGID_RES_GROUP: + inode->i_fop = &proc_res_group_operations; + break; +#endif case PROC_TID_OOM_SCORE: case PROC_TGID_OOM_SCORE: inode->i_fop = &proc_info_file_operations; Index: linux-2617-rc3/kernel/res_group/task.c =================================================================== --- linux-2617-rc3.orig/kernel/res_group/task.c 2006-04-27 09:22:20.000000000 -0700 +++ linux-2617-rc3/kernel/res_group/task.c 2006-04-27 09:22:27.000000000 -0700 @@ -13,7 +13,8 @@ * (at your option) any later version. * */ -#include <linux/sched.h> +#include <linux/seq_file.h> +#include <linux/proc_fs.h> #include <linux/module.h> #include "local.h" @@ -194,4 +195,33 @@ next_task: kref_put(&rgroup->ref, release_res_group); } +static int proc_res_group_show(struct seq_file *m, void *v) +{ + struct task_struct *tsk = m->private; + struct resource_group *rgroup = tsk->res_group; + + if (!rgroup) + return -EINVAL; + + kref_get(&rgroup->ref); + seq_puts(m, "/"); + if (!is_res_group_root(rgroup)) + seq_puts(m, rgroup->name); + seq_putc(m, '\n'); + kref_put(&rgroup->ref, release_res_group); + return 0; +} + +static int res_group_open(struct inode *inode, struct file *file) +{ + struct task_struct *tsk = PROC_I(inode)->task; + return single_open(file, proc_res_group_show, tsk); +} + +struct file_operations proc_res_group_operations = { + .open = res_group_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; EXPORT_SYMBOL_GPL(set_res_group); Index: linux-2617-rc3/include/linux/res_group.h =================================================================== --- linux-2617-rc3.orig/include/linux/res_group.h 2006-04-27 09:22:20.000000000 -0700 +++ linux-2617-rc3/include/linux/res_group.h 2006-04-27 09:22:27.000000000 -0700 @@ -94,6 +94,8 @@ struct resource_group { struct list_head children; /* head of children */ }; +extern struct file_operations proc_res_group_operations; + extern void init_task_res_group(struct task_struct *); extern void clear_task_res_group(struct task_struct *); extern void res_group_init(void); --
---------------------------------------------------------------------- Chandra Seetharaman | Be careful what you choose.... - sekharan@us.ibm.com | .......you may get it. ---------------------------------------------------------------------- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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