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-rw-r--r--kernel/trace/trace_events.c23
1 files changed, 11 insertions, 12 deletions
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index d128f65778e6..5e9ffc33f6db 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -878,9 +878,9 @@ event_subsystem_dir(const char *name, struct dentry *d_events)
878 "'%s/filter' entry\n", name); 878 "'%s/filter' entry\n", name);
879 } 879 }
880 880
881 entry = trace_create_file("enable", 0644, system->entry, 881 trace_create_file("enable", 0644, system->entry,
882 (void *)system->name, 882 (void *)system->name,
883 &ftrace_system_enable_fops); 883 &ftrace_system_enable_fops);
884 884
885 return system->entry; 885 return system->entry;
886} 886}
@@ -892,7 +892,6 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
892 const struct file_operations *filter, 892 const struct file_operations *filter,
893 const struct file_operations *format) 893 const struct file_operations *format)
894{ 894{
895 struct dentry *entry;
896 int ret; 895 int ret;
897 896
898 /* 897 /*
@@ -910,12 +909,12 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
910 } 909 }
911 910
912 if (call->regfunc) 911 if (call->regfunc)
913 entry = trace_create_file("enable", 0644, call->dir, call, 912 trace_create_file("enable", 0644, call->dir, call,
914 enable); 913 enable);
915 914
916 if (call->id && call->profile_enable) 915 if (call->id && call->profile_enable)
917 entry = trace_create_file("id", 0444, call->dir, call, 916 trace_create_file("id", 0444, call->dir, call,
918 id); 917 id);
919 918
920 if (call->define_fields) { 919 if (call->define_fields) {
921 ret = call->define_fields(call); 920 ret = call->define_fields(call);
@@ -924,16 +923,16 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
924 " events/%s\n", call->name); 923 " events/%s\n", call->name);
925 return ret; 924 return ret;
926 } 925 }
927 entry = trace_create_file("filter", 0644, call->dir, call, 926 trace_create_file("filter", 0644, call->dir, call,
928 filter); 927 filter);
929 } 928 }
930 929
931 /* A trace may not want to export its format */ 930 /* A trace may not want to export its format */
932 if (!call->show_format) 931 if (!call->show_format)
933 return 0; 932 return 0;
934 933
935 entry = trace_create_file("format", 0444, call->dir, call, 934 trace_create_file("format", 0444, call->dir, call,
936 format); 935 format);
937 936
938 return 0; 937 return 0;
939} 938}
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  
#include <linux/capability.h>
#include <linux/blkdev.h>
#include <linux/export.h>
#include <linux/gfp.h>
#include <linux/blkpg.h>
#include <linux/hdreg.h>
#include <linux/backing-dev.h>
#include <linux/fs.h>
#include <linux/blktrace_api.h>
#include <linux/pr.h>
#include <asm/uaccess.h>

static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user *arg)
{
	struct block_device *bdevp;
	struct gendisk *disk;
	struct hd_struct *part, *lpart;
	struct blkpg_ioctl_arg a;
	struct blkpg_partition p;
	struct disk_part_iter piter;
	long long start, length;
	int partno;

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;
	if (copy_from_user(&a, arg, sizeof(struct blkpg_ioctl_arg)))
		return -EFAULT;
	if (copy_from_user(&p, a.data, sizeof(struct blkpg_partition)))
		return -EFAULT;
	disk = bdev->bd_disk;
	if (bdev != bdev->bd_contains)
		return -EINVAL;
	partno = p.pno;
	if (partno <= 0)
		return -EINVAL;
	switch (a.op) {
		case BLKPG_ADD_PARTITION:
			start = p.start >> 9;
			length = p.length >> 9;
			/* check for fit in a hd_struct */
			if (sizeof(sector_t) == sizeof(long) &&
			    sizeof(long long) > sizeof(long)) {
				long pstart = start, plength = length;
				if (pstart != start || plength != length
				    || pstart < 0 || plength < 0 || partno > 65535)
					return -EINVAL;
			}

			mutex_lock(&bdev->bd_mutex);

			/* overlap? */
			disk_part_iter_init(&piter, disk,
					    DISK_PITER_INCL_EMPTY);
			while ((part = disk_part_iter_next(&piter))) {
				if (!(start + length <= part->start_sect ||
				      start >= part->start_sect + part->nr_sects)) {
					disk_part_iter_exit(&piter);
					mutex_unlock(&bdev->bd_mutex);
					return -EBUSY;
				}
			}
			disk_part_iter_exit(&piter);

			/* all seems OK */
			part = add_partition(disk, partno, start, length,
					     ADDPART_FLAG_NONE, NULL);
			mutex_unlock(&bdev->bd_mutex);
			return PTR_ERR_OR_ZERO(part);
		case BLKPG_DEL_PARTITION:
			part = disk_get_part(disk, partno);
			if (!part)
				return -ENXIO;

			bdevp = bdget(part_devt(part));
			disk_put_part(part);
			if (!bdevp)
				return -ENOMEM;

			mutex_lock(&bdevp->bd_mutex);
			if (bdevp->bd_openers) {
				mutex_unlock(&bdevp->bd_mutex);
				bdput(bdevp);
				return -EBUSY;
			}
			/* all seems OK */
			fsync_bdev(bdevp);
			invalidate_bdev(bdevp);

			mutex_lock_nested(&bdev->bd_mutex, 1);
			delete_partition(disk, partno);
			mutex_unlock(&bdev->bd_mutex);
			mutex_unlock(&bdevp->bd_mutex);
			bdput(bdevp);

			return 0;
		case BLKPG_RESIZE_PARTITION:
			start = p.start >> 9;
			/* new length of partition in bytes */