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NFS: Ensure the server has an up to date ctime before hardlinking

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[ Upstream commit 204975036b ]

Creating a hard link is required by POSIX to update the file ctime, so
ensure that the file data is synced to disk so that we don't clobber the
updated ctime by writing back after creating the hard link.

Fixes: 9f76827287 ("NFS: Move the delegation return down into nfs4_proc_link()")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Trond Myklebust
2021-12-15 16:38:15 -05:00
committed by Greg Kroah-Hartman
parent 4cd0ef6215
commit 666f6ab882
1 changed files with 2 additions and 0 deletions
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2
fs/nfs/dir.c
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@@ -2192,6 +2192,8 @@ nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
trace_nfs_link_enter(inode, dir, dentry);
d_drop(dentry);
if (S_ISREG(inode->i_mode))
nfs_sync_inode(inode);
error = NFS_PROTO(dir)->link(inode, dir, &dentry->d_name);
if (error == 0) {
ihold(inode);