From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/fs/statfs.c | 20 ++++++++++++++++++--
1 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/kernel/fs/statfs.c b/kernel/fs/statfs.c
index 56f655f..d42b44d 100644
--- a/kernel/fs/statfs.c
+++ b/kernel/fs/statfs.c
@@ -29,6 +29,8 @@
flags |= ST_NODIRATIME;
if (mnt_flags & MNT_RELATIME)
flags |= ST_RELATIME;
+ if (mnt_flags & MNT_NOSYMFOLLOW)
+ flags |= ST_NOSYMFOLLOW;
return flags;
}
@@ -66,6 +68,20 @@
buf->f_frsize = buf->f_bsize;
return retval;
}
+
+int vfs_get_fsid(struct dentry *dentry, __kernel_fsid_t *fsid)
+{
+ struct kstatfs st;
+ int error;
+
+ error = statfs_by_dentry(dentry, &st);
+ if (error)
+ return error;
+
+ *fsid = st.f_fsid;
+ return 0;
+}
+EXPORT_SYMBOL(vfs_get_fsid);
int vfs_statfs(const struct path *path, struct kstatfs *buf)
{
@@ -114,6 +130,7 @@
if (sizeof(buf) == sizeof(*st))
memcpy(&buf, st, sizeof(*st));
else {
+ memset(&buf, 0, sizeof(buf));
if (sizeof buf.f_blocks == 4) {
if ((st->f_blocks | st->f_bfree | st->f_bavail |
st->f_bsize | st->f_frsize) &
@@ -142,7 +159,6 @@
buf.f_namelen = st->f_namelen;
buf.f_frsize = st->f_frsize;
buf.f_flags = st->f_flags;
- memset(buf.f_spare, 0, sizeof(buf.f_spare));
}
if (copy_to_user(p, &buf, sizeof(buf)))
return -EFAULT;
@@ -155,6 +171,7 @@
if (sizeof(buf) == sizeof(*st))
memcpy(&buf, st, sizeof(*st));
else {
+ memset(&buf, 0, sizeof(buf));
buf.f_type = st->f_type;
buf.f_bsize = st->f_bsize;
buf.f_blocks = st->f_blocks;
@@ -166,7 +183,6 @@
buf.f_namelen = st->f_namelen;
buf.f_frsize = st->f_frsize;
buf.f_flags = st->f_flags;
- memset(buf.f_spare, 0, sizeof(buf.f_spare));
}
if (copy_to_user(p, &buf, sizeof(buf)))
return -EFAULT;
--
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