From 4795bb37effb7b8fe77e2d2034545d062d3788a8 Mon Sep 17 00:00:00 2001
From: "J. Bruce Fields" <bfields@redhat.com>
Date: Tue, 11 Jan 2011 13:55:46 -0500
Subject: [PATCH] nfsd: break lease on unlink, link, and rename
Any change to any of the links pointing to an entry should also break
delegations.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
---
fs/nfsd/vfs.c | 27 +++++++++++++++++++++++----
1 file changed, 23 insertions(+), 4 deletions(-)
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index f97d4356431b..a110adbb3673 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -272,6 +272,13 @@ out:
return err;
}
+static int nfsd_break_lease(struct inode *inode)
+{
+ if (!S_ISREG(inode->i_mode))
+ return 0;
+ return break_lease(inode, O_WRONLY | O_NONBLOCK);
+}
+
/*
* Commit metadata changes to stable storage.
*/
@@ -414,7 +421,7 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap,
err = nfserr_notsync;
if (!check_guard || guardtime == inode->i_ctime.tv_sec) {
- host_err = break_lease(inode, O_WRONLY | O_NONBLOCK);
+ host_err = nfsd_break_lease(inode);
if (host_err)
goto out_nfserr;
fh_lock(fhp);
@@ -1639,6 +1646,12 @@ nfsd_link(struct svc_rqst *rqstp, struct svc_fh *ffhp,
err = nfserrno(host_err);
goto out_dput;
}
+ err = nfserr_noent;
+ if (!dold->d_inode)
+ goto out_drop_write;
+ host_err = nfsd_break_lease(dold->d_inode);
+ if (host_err)
+ goto out_drop_write;
host_err = vfs_link(dold, dirp, dnew);
if (!host_err) {
err = nfserrno(commit_metadata(ffhp));
@@ -1650,6 +1663,7 @@ nfsd_link(struct svc_rqst *rqstp, struct svc_fh *ffhp,
else
err = nfserrno(host_err);
}
+out_drop_write:
mnt_drop_write(tfhp->fh_export->ex_path.mnt);
out_dput:
dput(dnew);
@@ -1731,15 +1745,17 @@ nfsd_rename(struct svc_rqst *rqstp, struct svc_fh *ffhp, char *fname, int flen,
if (host_err)
goto out_dput_new;
+ host_err = nfsd_break_lease(odentry->d_inode);
+ if (host_err)
+ goto out_drop_write;
host_err = vfs_rename(fdir, odentry, tdir, ndentry);
if (!host_err) {
host_err = commit_metadata(tfhp);
if (!host_err)
host_err = commit_metadata(ffhp);
}
-
+out_drop_write:
mnt_drop_write(ffhp->fh_export->ex_path.mnt);
-
out_dput_new:
dput(ndentry);
out_dput_old:
@@ -1802,11 +1818,14 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
if (host_err)
goto out_nfserr;
+ host_err = nfsd_break_lease(rdentry->d_inode);
+ if (host_err)
+ goto out_put;
if (type != S_IFDIR)
host_err = vfs_unlink(dirp, rdentry);
else
host_err = vfs_rmdir(dirp, rdentry);
-
+out_put:
dput(rdentry);
if (!host_err)
--
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