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NFS: Fix memroy leak for double mounts 

When double mounting same nfs filesystem, the devname saved in d_fsdata
will be lost.The second mount should not change the devname that
be saved in d_fsdata.

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Kinglong Mee 2014-04-15 17:22:59 +08:00 committed by Trond Myklebust
parent c9eaa447e7
commit 4dfc7fdb9e
1 changed files with 2 additions and 1 deletions
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3
fs/nfs/getroot.c
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@ -120,7 +120,8 @@ struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh,
security_d_instantiate(ret, inode);
spin_lock(&ret->d_lock);
if (IS_ROOT(ret) && !(ret->d_flags & DCACHE_NFSFS_RENAMED)) {
if (IS_ROOT(ret) && !ret->d_fsdata &&
!(ret->d_flags & DCACHE_NFSFS_RENAMED)) {
ret->d_fsdata = name;
name = NULL;
}