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authorBenjamin Coddington <bcodding@redhat.com>2017-02-01 00:00:07 -0500
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2017-02-08 17:02:44 -0500
commit920b4530fb80430ff30ef83efe21ba1fa5623731 (patch)
treee09a3508c339c4f6feeba20f14a7104e77370a03 /fs/nfs
parent68e33bd6bbb79819e5cb7bce26559191b144c465 (diff)
NFS: nfs_rename() handle -ERESTARTSYS dentry left behind
An interrupted rename will leave the old dentry behind if the rename succeeds. Fix this by moving the final local work of the rename to rpc_call_done so that the results of the RENAME can always be handled, even if the original process has already returned with -ERESTARTSYS. Signed-off-by: Benjamin Coddington <bcodding@redhat.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/dir.c36
1 files changed, 25 insertions, 11 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index fad81041f5ab..fb499a3f21b5 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -2002,6 +2002,29 @@ nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
}
EXPORT_SYMBOL_GPL(nfs_link);
+static void
+nfs_complete_rename(struct rpc_task *task, struct nfs_renamedata *data)
+{
+ struct dentry *old_dentry = data->old_dentry;
+ struct dentry *new_dentry = data->new_dentry;
+ struct inode *old_inode = d_inode(old_dentry);
+ struct inode *new_inode = d_inode(new_dentry);
+
+ nfs_mark_for_revalidate(old_inode);
+
+ switch (task->tk_status) {
+ case 0:
+ if (new_inode != NULL)
+ nfs_drop_nlink(new_inode);
+ d_move(old_dentry, new_dentry);
+ nfs_set_verifier(new_dentry,
+ nfs_save_change_attribute(data->new_dir));
+ break;
+ case -ENOENT:
+ nfs_dentry_handle_enoent(old_dentry);
+ }
+}
+
/*
* RENAME
* FIXME: Some nfsds, like the Linux user space nfsd, may generate a
@@ -2084,7 +2107,8 @@ int nfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (new_inode != NULL)
NFS_PROTO(new_inode)->return_delegation(new_inode);
- task = nfs_async_rename(old_dir, new_dir, old_dentry, new_dentry, NULL);
+ task = nfs_async_rename(old_dir, new_dir, old_dentry, new_dentry,
+ nfs_complete_rename);
if (IS_ERR(task)) {
error = PTR_ERR(task);
goto out;
@@ -2094,21 +2118,11 @@ int nfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (error == 0)
error = task->tk_status;
rpc_put_task(task);
- nfs_mark_for_revalidate(old_inode);
out:
if (rehash)
d_rehash(rehash);
trace_nfs_rename_exit(old_dir, old_dentry,
new_dir, new_dentry, error);
- if (!error) {
- if (new_inode != NULL)
- nfs_drop_nlink(new_inode);
- d_move(old_dentry, new_dentry);
- nfs_set_verifier(new_dentry,
- nfs_save_change_attribute(new_dir));
- } else if (error == -ENOENT)
- nfs_dentry_handle_enoent(old_dentry);
-
/* new dentry created? */
if (dentry)
dput(dentry);