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-rw-r--r--fs/ext4/mballoc.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 585c259..9122271 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2786,14 +2786,20 @@ static int ext4_mb_init_per_dev_proc(struct super_block *sb)
mode_t mode = S_IFREG | S_IRUGO | S_IWUSR;
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct proc_dir_entry *proc;
- char devname[64];
+ char devname[BDEVNAME_SIZE], *p;
if (proc_root_ext4 == NULL) {
sbi->s_mb_proc = NULL;
return -EINVAL;
}
bdevname(sb->s_bdev, devname);
+ p = devname;
+ while ((p = strchr(p, '/')))
+ *p = '!';
+
sbi->s_mb_proc = proc_mkdir(devname, proc_root_ext4);
+ if (!sbi->s_mb_proc)
+ goto err_create_dir;
MB_PROC_HANDLER(EXT4_MB_STATS_NAME, stats);
MB_PROC_HANDLER(EXT4_MB_MAX_TO_SCAN_NAME, max_to_scan);
@@ -2805,7 +2811,6 @@ static int ext4_mb_init_per_dev_proc(struct super_block *sb)
return 0;
err_out:
- printk(KERN_ERR "EXT4-fs: Unable to create %s\n", devname);
remove_proc_entry(EXT4_MB_GROUP_PREALLOC, sbi->s_mb_proc);
remove_proc_entry(EXT4_MB_STREAM_REQ, sbi->s_mb_proc);
remove_proc_entry(EXT4_MB_ORDER2_REQ, sbi->s_mb_proc);
@@ -2814,6 +2819,8 @@ err_out:
remove_proc_entry(EXT4_MB_STATS_NAME, sbi->s_mb_proc);
remove_proc_entry(devname, proc_root_ext4);
sbi->s_mb_proc = NULL;
+err_create_dir:
+ printk(KERN_ERR "EXT4-fs: Unable to create %s\n", devname);
return -ENOMEM;
}
@@ -2821,12 +2828,15 @@ err_out:
static int ext4_mb_destroy_per_dev_proc(struct super_block *sb)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
- char devname[64];
+ char devname[BDEVNAME_SIZE], *p;
if (sbi->s_mb_proc == NULL)
return -EINVAL;
bdevname(sb->s_bdev, devname);
+ p = devname;
+ while ((p = strchr(p, '/')))
+ *p = '!';
remove_proc_entry(EXT4_MB_GROUP_PREALLOC, sbi->s_mb_proc);
remove_proc_entry(EXT4_MB_STREAM_REQ, sbi->s_mb_proc);
remove_proc_entry(EXT4_MB_ORDER2_REQ, sbi->s_mb_proc);
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