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vfs: add vfs_get_fsid() helper

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Wrapper around statfs() interface.

Cc: Al Viro <[email protected]>
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Jan Kara <[email protected]>
This commit is contained in:
Amir Goldstein 2019-01-10 19:04:38 +02:00 • committed by Jan Kara
commit ec86ff5689
2 changed files with 17 additions and 0 deletions
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14
fs/statfs.c
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@ -67,6 +67,20 @@ static int statfs_by_dentry(struct dentry *dentry, struct kstatfs *buf)
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)
{
int error;