From 888e694c167975709f17526dbbed2d98f84e8f85 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Fri, 4 Nov 2005 15:38:11 -0500 Subject: NFSv4: Recover locks too when returning a delegation Delegations allow us to cache posix and BSD locks, however when the delegation is recalled, we need to "flush the cache" and send the cached LOCK requests to the server. This patch sets up the mechanism for doing so. Signed-off-by: Trond Myklebust --- fs/nfs/delegation.c | 38 ++++++++++++++++++++++++++++++++++++-- 1 file changed, 36 insertions(+), 2 deletions(-) (limited to 'fs/nfs/delegation.c') diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index 44135af9894..3976c177a7d 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -31,11 +31,42 @@ static void nfs_free_delegation(struct nfs_delegation *delegation) kfree(delegation); } +static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_state *state) +{ + struct inode *inode = state->inode; + struct file_lock *fl; + int status; + + for (fl = inode->i_flock; fl != 0; fl = fl->fl_next) { + if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) + continue; + if ((struct nfs_open_context *)fl->fl_file->private_data != ctx) + continue; + status = nfs4_lock_delegation_recall(state, fl); + if (status >= 0) + continue; + switch (status) { + default: + printk(KERN_ERR "%s: unhandled error %d.\n", + __FUNCTION__, status); + case -NFS4ERR_EXPIRED: + /* kill_proc(fl->fl_pid, SIGLOST, 1); */ + case -NFS4ERR_STALE_CLIENTID: + nfs4_schedule_state_recovery(NFS_SERVER(inode)->nfs4_state); + goto out_err; + } + } + return 0; +out_err: + return status; +} + static void nfs_delegation_claim_opens(struct inode *inode) { struct nfs_inode *nfsi = NFS_I(inode); struct nfs_open_context *ctx; struct nfs4_state *state; + int err; again: spin_lock(&inode->i_lock); @@ -47,9 +78,12 @@ again: continue; get_nfs_open_context(ctx); spin_unlock(&inode->i_lock); - if (nfs4_open_delegation_recall(ctx->dentry, state) < 0) - return; + err = nfs4_open_delegation_recall(ctx->dentry, state); + if (err >= 0) + err = nfs_delegation_claim_locks(ctx, state); put_nfs_open_context(ctx); + if (err != 0) + return; goto again; } spin_unlock(&inode->i_lock); -- cgit v1.2.3