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Diffstat (limited to 'fs/nfs/delegation.c')
-rw-r--r--fs/nfs/delegation.c33
1 files changed, 17 insertions, 16 deletions
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 968225a8801..6dd48a4405b 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -10,6 +10,7 @@
#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/sched.h>
+#include <linux/smp_lock.h>
#include <linux/spinlock.h>
#include <linux/nfs4.h>
@@ -68,29 +69,26 @@ static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_
{
struct inode *inode = state->inode;
struct file_lock *fl;
- int status;
+ int status = 0;
+
+ if (inode->i_flock == NULL)
+ goto out;
+ /* Protect inode->i_flock using the BKL */
+ lock_kernel();
for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) {
if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK)))
continue;
if (nfs_file_open_context(fl->fl_file) != ctx)
continue;
+ unlock_kernel();
status = nfs4_lock_delegation_recall(state, fl);
- if (status >= 0)
- continue;
- switch (status) {
- default:
- printk(KERN_ERR "%s: unhandled error %d.\n",
- __func__, status);
- case -NFS4ERR_EXPIRED:
- /* kill_proc(fl->fl_pid, SIGLOST, 1); */
- case -NFS4ERR_STALE_CLIENTID:
- nfs4_schedule_state_recovery(NFS_SERVER(inode)->nfs_client);
- goto out_err;
- }
+ if (status < 0)
+ goto out;
+ lock_kernel();
}
- return 0;
-out_err:
+ unlock_kernel();
+out:
return status;
}
@@ -268,7 +266,10 @@ static int __nfs_inode_return_delegation(struct inode *inode, struct nfs_delegat
struct nfs_inode *nfsi = NFS_I(inode);
nfs_msync_inode(inode);
- /* Guard against new delegated open calls */
+ /*
+ * Guard against new delegated open/lock/unlock calls and against
+ * state recovery
+ */
down_write(&nfsi->rwsem);
nfs_delegation_claim_opens(inode, &delegation->stateid);
up_write(&nfsi->rwsem);