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Diffstat (limited to 'fs/ext4/sysfs.c')
-rw-r--r--fs/ext4/sysfs.c24
1 files changed, 18 insertions, 6 deletions
diff --git a/fs/ext4/sysfs.c b/fs/ext4/sysfs.c
index 6d332dff79..63cbda3700 100644
--- a/fs/ext4/sysfs.c
+++ b/fs/ext4/sysfs.c
@@ -29,6 +29,7 @@ typedef enum {
attr_trigger_test_error,
attr_first_error_time,
attr_last_error_time,
+ attr_clusters_in_group,
attr_feature,
attr_pointer_ui,
attr_pointer_ul,
@@ -104,7 +105,7 @@ static ssize_t reserved_clusters_store(struct ext4_sb_info *sbi,
int ret;
ret = kstrtoull(skip_spaces(buf), 0, &val);
- if (ret || val >= clusters)
+ if (ret || val >= clusters || (s64)val < 0)
return -EINVAL;
atomic64_set(&sbi->s_resv_clusters, val);
@@ -207,13 +208,14 @@ EXT4_ATTR_FUNC(sra_exceeded_retry_limit, 0444);
EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, inode_readahead,
ext4_sb_info, s_inode_readahead_blks);
+EXT4_ATTR_OFFSET(mb_group_prealloc, 0644, clusters_in_group,
+ ext4_sb_info, s_mb_group_prealloc);
EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal);
EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats);
EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan);
EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan);
EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs);
EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request);
-EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc);
EXT4_RW_ATTR_SBI_UI(mb_max_linear_groups, s_mb_max_linear_groups);
EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb);
EXT4_ATTR(trigger_fs_error, 0200, trigger_test_error);
@@ -392,6 +394,7 @@ static ssize_t ext4_attr_show(struct kobject *kobj,
(unsigned long long)
percpu_counter_sum(&sbi->s_sra_exceeded_retry_limit));
case attr_inode_readahead:
+ case attr_clusters_in_group:
case attr_pointer_ui:
if (!ptr)
return 0;
@@ -451,7 +454,8 @@ static ssize_t ext4_attr_store(struct kobject *kobj,
s_kobj);
struct ext4_attr *a = container_of(attr, struct ext4_attr, attr);
void *ptr = calc_ptr(a, sbi);
- unsigned long t;
+ unsigned int t;
+ unsigned long lt;
int ret;
switch (a->attr_id) {
@@ -460,7 +464,7 @@ static ssize_t ext4_attr_store(struct kobject *kobj,
case attr_pointer_ui:
if (!ptr)
return 0;
- ret = kstrtoul(skip_spaces(buf), 0, &t);
+ ret = kstrtouint(skip_spaces(buf), 0, &t);
if (ret)
return ret;
if (a->attr_ptr == ptr_ext4_super_block_offset)
@@ -468,13 +472,21 @@ static ssize_t ext4_attr_store(struct kobject *kobj,
else
*((unsigned int *) ptr) = t;
return len;
+ case attr_clusters_in_group:
+ ret = kstrtouint(skip_spaces(buf), 0, &t);
+ if (ret)
+ return ret;
+ if (t > sbi->s_clusters_per_group)
+ return -EINVAL;
+ *((unsigned int *) ptr) = t;
+ return len;
case attr_pointer_ul:
if (!ptr)
return 0;
- ret = kstrtoul(skip_spaces(buf), 0, &t);
+ ret = kstrtoul(skip_spaces(buf), 0, &lt);
if (ret)
return ret;
- *((unsigned long *) ptr) = t;
+ *((unsigned long *) ptr) = lt;
return len;
case attr_inode_readahead:
return inode_readahead_blks_store(sbi, buf, len);