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NFS: nfs_rename() - revalidate directories on -ERESTARTSYS

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An interrupted rename will leave the old dentry behind if the rename
succeeds.  Fix this by forcing a lookup the next time through
->d_revalidate.

A previous attempt at solving this problem took the approach to complete
the work of the rename asynchronously, however that approach was wrong
since it would allow the d_move() to occur after the directory's i_mutex
had been dropped by the original process.

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Benjamin Coddington 2017-06-16 11:13:00 -04:00 • committed by Anna Schumaker
parent a7a3b1e971
commit 818a8dbe83
3 changed files with 19 additions and 1 deletions
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1
include/linux/nfs_xdr.h
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@ -1533,6 +1533,7 @@ struct nfs_renamedata {
struct nfs_fattr new_fattr;
void (*complete)(struct rpc_task *, struct nfs_renamedata *);
long timeout;
bool cancelled;
};
struct nfs_access_entry;