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nfsd4: add helper function for lease setup 

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields 2011-01-31 11:55:12 -05:00
parent 6b57d9c86d
commit 22d38c4c10
1 changed files with 21 additions and 12 deletions
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33
fs/nfsd/nfs4state.c
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@ -2639,6 +2639,26 @@ static bool nfsd4_cb_channel_good(struct nfs4_client *clp)
return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;
}
static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag)
{
struct file_lock *fl;
fl = locks_alloc_lock();
if (!fl)
return NULL;
locks_init_lock(fl);
fl->fl_lmops = &nfsd_lease_mng_ops;
fl->fl_flags = FL_LEASE;
fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
fl->fl_end = OFFSET_MAX;
fl->fl_owner = (fl_owner_t)dp;
fl->fl_file = dp->dl_vfs_file;
BUG_ON(!fl->fl_file);
fl->fl_pid = current->tgid;
dp->dl_flock = fl;
return fl;
}
/*
* Attempt to hand out a delegation.
*/
@ -2684,20 +2704,9 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta
goto out;
}
status = -ENOMEM;
fl = locks_alloc_lock();
fl = nfs4_alloc_init_lease(dp, flag);
if (!fl)
goto out;
locks_init_lock(fl);
fl->fl_lmops = &nfsd_lease_mng_ops;
fl->fl_flags = FL_LEASE;
fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
fl->fl_end = OFFSET_MAX;
fl->fl_owner = (fl_owner_t)dp;
fl->fl_file = find_readable_file(stp->st_file);
BUG_ON(!fl->fl_file);
fl->fl_pid = current->tgid;
dp->dl_flock = fl;
/* vfs_setlease checks to see if delegation should be handed out.
* the lock_manager callback fl_change is used
*/