nfsd4: initialize delegation pointer to lease

[firefly-linux-kernel-4.4.55.git] / fs / nfsd / nfs4state.c

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index d4aa1b59d84b26dd9eec7ae68bcf1ec54e9cde52..b7f818b0580c2667698b4cd2c0c14e8376cfa789 100644 (file)
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -33,7 +33,7 @@
 */
 
 #include <linux/file.h>
-#include <linux/smp_lock.h>
+#include <linux/fs.h>
 #include <linux/slab.h>
 #include <linux/namei.h>
 #include <linux/swap.h>
@@ -2309,22 +2309,6 @@ void nfsd_release_deleg_cb(struct file_lock *fl)
        dp->dl_flock = NULL;
 }
 
-/*
- * Set the delegation file_lock back pointer.
- *
- * Called from setlease() with lock_kernel() held.
- */
-static
-void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl)
-{
-       struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner;
-
-       dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp);
-       if (!dp)
-               return;
-       dp->dl_flock = new;
-}
-
 /*
  * Called from setlease() with lock_kernel() held
  */
@@ -2355,7 +2339,6 @@ int nfsd_change_deleg_cb(struct file_lock **onlist, int arg)
 static const struct lock_manager_operations nfsd_lease_mng_ops = {
        .fl_break = nfsd_break_deleg_cb,
        .fl_release_private = nfsd_release_deleg_cb,
-       .fl_copy_lock = nfsd_copy_lock_deleg_cb,
        .fl_mylease = nfsd_same_client_deleg_cb,
        .fl_change = nfsd_change_deleg_cb,
 };
@@ -2614,7 +2597,7 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta
        struct nfs4_delegation *dp;
        struct nfs4_stateowner *sop = stp->st_stateowner;
        int cb_up = atomic_read(&sop->so_client->cl_cb_set);
-       struct file_lock fl, *flp = &fl;
+       struct file_lock *fl;
        int status, flag = 0;
 
        flag = NFS4_OPEN_DELEGATE_NONE;
@@ -2648,21 +2631,27 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta
                flag = NFS4_OPEN_DELEGATE_NONE;
                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;
+       status = -ENOMEM;
+       fl = locks_alloc_lock();
+       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 callbacks fl_mylease and fl_change are used
         */
-       if ((status = vfs_setlease(fl.fl_file, fl.fl_type, &flp))) {
+       if ((status = vfs_setlease(fl->fl_file, fl->fl_type, &fl))) {
                dprintk("NFSD: setlease failed [%d], no delegation\n", status);
+               dp->dl_flock = NULL;
                unhash_delegation(dp);
                flag = NFS4_OPEN_DELEGATE_NONE;
                goto out;
@@ -4024,7 +4013,7 @@ check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner)
        struct inode *inode = filp->fi_inode;
        int status = 0;
 
-       lock_kernel();
+       lock_flocks();
        for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
                if ((*flpp)->fl_owner == (fl_owner_t)lowner) {
                        status = 1;
@@ -4032,7 +4021,7 @@ check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner)
                }
        }
 out:
-       unlock_kernel();
+       unlock_flocks();
        return status;
 }