From acfdf5c383b38f7f4dddae41b97c97f1ae058f49 Mon Sep 17 00:00:00 2001 From: "J. Bruce Fields" Date: Mon, 31 Jan 2011 19:20:39 -0500 Subject: nfsd4: acquire only one lease per file Instead of acquiring one lease each time another client opens a file, nfsd can acquire just one lease to represent all of them, and reference count it to determine when to release it. This fixes a regression introduced by c45821d263a8a5109d69a9e8942b8d65bcd5f31a "locks: eliminate fl_mylease callback": after that patch, only the struct file * is used to determine who owns a given lease. But since we recently converted the server to share a single struct file per open, if we acquire multiple leases on the same file from nfsd, it then becomes impossible on unlocking a lease to determine which of those leases (all of whom share the same struct file *) we meant to remove. Thanks to Takashi Iwai for catching a bug in a previous version of this patch. Tested-by: Takashi Iwai Signed-off-by: J. Bruce Fields --- fs/nfsd/state.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'fs/nfsd/state.h') diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index 3074656..2d31224 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -83,8 +83,6 @@ struct nfs4_delegation { atomic_t dl_count; /* ref count */ struct nfs4_client *dl_client; struct nfs4_file *dl_file; - struct file *dl_vfs_file; - struct file_lock *dl_flock; u32 dl_type; time_t dl_time; /* For recall: */ @@ -379,6 +377,9 @@ struct nfs4_file { */ atomic_t fi_readers; atomic_t fi_writers; + struct file *fi_deleg_file; + struct file_lock *fi_lease; + atomic_t fi_delegees; struct inode *fi_inode; u32 fi_id; /* used with stateowner->so_id * for stateid_hashtbl hash */ -- cgit v1.1