Introduce proc_statfs() to replace simple_statfs(), so that
f_bsize queried from statfs() can be consistent w/ the value we
set in s_blocksize.
stat -f /proc/
Before:
ID: 0 Namelen: 255 Type: proc
Block size: 4096 Fundamental block size: 4096
Blocks: Total: 0 Free: 0 Available: 0
Inodes: Total: 0 Free: 0
After:
ID: 0 Namelen: 255 Type: proc
Block size: 1024 Fundamental block size: 1024
Blocks: Total: 0 Free: 0 Available: 0
Inodes: Total: 0 Free: 0
Signed-off-by: Chao Yu <chao@xxxxxxxxxx>
---
fs/proc/inode.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index f495fdb39151..d39e3b9b3135 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -25,6 +25,7 @@
#include <linux/slab.h>
#include <linux/mount.h>
#include <linux/bug.h>
+#include <linux/statfs.h>
#include "internal.h"
@@ -176,6 +177,14 @@ static inline const char *hidepid2str(enum proc_hidepid v)
return "unknown";
}
+static int proc_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+ buf->f_type = dentry->d_sb->s_magic;
+ buf->f_bsize = dentry->d_sb->s_blocksize;
+ buf->f_namelen = PROC_NAME_LEN;
+ return 0;
+}
+
static int proc_show_options(struct seq_file *seq, struct dentry *root)
{
struct proc_fs_info *fs_info = proc_sb_info(root->d_sb);
@@ -195,7 +204,7 @@ const struct super_operations proc_sops = {
.free_inode = proc_free_inode,
.drop_inode = generic_delete_inode,
.evict_inode = proc_evict_inode,
- .statfs = simple_statfs,
+ .statfs = proc_statfs,
.show_options = proc_show_options,
};
--
2.25.1
