nfsd: simplify fh_verify access checks
[safe/jmp/linux-2.6] / fs / nfs / direct.c
index 9d9085b..e1d415e 100644 (file)
@@ -255,10 +255,13 @@ static void nfs_direct_read_release(void *calldata)
 
        if (put_dreq(dreq))
                nfs_direct_complete(dreq);
-       nfs_readdata_release(calldata);
+       nfs_readdata_free(data);
 }
 
 static const struct rpc_call_ops nfs_read_direct_ops = {
+#if defined(CONFIG_NFS_V4_1)
+       .rpc_call_prepare = nfs_read_prepare,
+#endif /* CONFIG_NFS_V4_1 */
        .rpc_call_done = nfs_direct_read_result,
        .rpc_release = nfs_direct_read_release,
 };
@@ -311,14 +314,14 @@ static ssize_t nfs_direct_read_schedule_segment(struct nfs_direct_req *dreq,
                                        data->npages, 1, 0, data->pagevec, NULL);
                up_read(&current->mm->mmap_sem);
                if (result < 0) {
-                       nfs_readdata_release(data);
+                       nfs_readdata_free(data);
                        break;
                }
                if ((unsigned)result < data->npages) {
                        bytes = result * PAGE_SIZE;
                        if (bytes <= pgbase) {
                                nfs_direct_release_pages(data->pagevec, result);
-                               nfs_readdata_release(data);
+                               nfs_readdata_free(data);
                                break;
                        }
                        bytes -= pgbase;
@@ -331,7 +334,7 @@ static ssize_t nfs_direct_read_schedule_segment(struct nfs_direct_req *dreq,
                data->inode = inode;
                data->cred = msg.rpc_cred;
                data->args.fh = NFS_FH(inode);
-               data->args.context = get_nfs_open_context(ctx);
+               data->args.context = ctx;
                data->args.offset = pos;
                data->args.pgbase = pgbase;
                data->args.pages = data->pagevec;
@@ -347,8 +350,9 @@ static ssize_t nfs_direct_read_schedule_segment(struct nfs_direct_req *dreq,
                NFS_PROTO(inode)->read_setup(data, &msg);
 
                task = rpc_run_task(&task_setup_data);
-               if (!IS_ERR(task))
-                       rpc_put_task(task);
+               if (IS_ERR(task))
+                       break;
+               rpc_put_task(task);
 
                dprintk("NFS: %5u initiated direct read call "
                        "(req %s/%Ld, %zu bytes @ offset %Lu)\n",
@@ -437,7 +441,7 @@ static void nfs_direct_free_writedata(struct nfs_direct_req *dreq)
                struct nfs_write_data *data = list_entry(dreq->rewrite_list.next, struct nfs_write_data, pages);
                list_del(&data->pages);
                nfs_direct_release_pages(data->pagevec, data->npages);
-               nfs_writedata_release(data);
+               nfs_writedata_free(data);
        }
 }
 
@@ -453,6 +457,7 @@ static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq)
        };
        struct rpc_task_setup task_setup_data = {
                .rpc_client = NFS_CLIENT(inode),
+               .rpc_message = &msg,
                .callback_ops = &nfs_write_direct_ops,
                .workqueue = nfsiod_workqueue,
                .flags = RPC_TASK_ASYNC,
@@ -508,27 +513,37 @@ static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq)
 static void nfs_direct_commit_result(struct rpc_task *task, void *calldata)
 {
        struct nfs_write_data *data = calldata;
-       struct nfs_direct_req *dreq = (struct nfs_direct_req *) data->req;
 
        /* Call the NFS version-specific code */
-       if (NFS_PROTO(data->inode)->commit_done(task, data) != 0)
-               return;
-       if (unlikely(task->tk_status < 0)) {
+       NFS_PROTO(data->inode)->commit_done(task, data);
+}
+
+static void nfs_direct_commit_release(void *calldata)
+{
+       struct nfs_write_data *data = calldata;
+       struct nfs_direct_req *dreq = (struct nfs_direct_req *) data->req;
+       int status = data->task.tk_status;
+
+       if (status < 0) {
                dprintk("NFS: %5u commit failed with error %d.\n",
-                               task->tk_pid, task->tk_status);
+                               data->task.tk_pid, status);
                dreq->flags = NFS_ODIRECT_RESCHED_WRITES;
        } else if (memcmp(&dreq->verf, &data->verf, sizeof(data->verf))) {
-               dprintk("NFS: %5u commit verify failed\n", task->tk_pid);
+               dprintk("NFS: %5u commit verify failed\n", data->task.tk_pid);
                dreq->flags = NFS_ODIRECT_RESCHED_WRITES;
        }
 
-       dprintk("NFS: %5u commit returned %d\n", task->tk_pid, task->tk_status);
+       dprintk("NFS: %5u commit returned %d\n", data->task.tk_pid, status);
        nfs_direct_write_complete(dreq, data->inode);
+       nfs_commit_free(data);
 }
 
 static const struct rpc_call_ops nfs_commit_direct_ops = {
+#if defined(CONFIG_NFS_V4_1)
+       .rpc_call_prepare = nfs_write_prepare,
+#endif /* CONFIG_NFS_V4_1 */
        .rpc_call_done = nfs_direct_commit_result,
-       .rpc_release = nfs_commit_release,
+       .rpc_release = nfs_direct_commit_release,
 };
 
 static void nfs_direct_commit_schedule(struct nfs_direct_req *dreq)
@@ -556,7 +571,7 @@ static void nfs_direct_commit_schedule(struct nfs_direct_req *dreq)
        data->args.fh = NFS_FH(data->inode);
        data->args.offset = 0;
        data->args.count = 0;
-       data->args.context = get_nfs_open_context(dreq->ctx);
+       data->args.context = dreq->ctx;
        data->res.count = 0;
        data->res.fattr = &data->fattr;
        data->res.verf = &data->verf;
@@ -596,7 +611,7 @@ static void nfs_direct_write_complete(struct nfs_direct_req *dreq, struct inode
 
 static void nfs_alloc_commit_data(struct nfs_direct_req *dreq)
 {
-       dreq->commit_data = nfs_commit_alloc();
+       dreq->commit_data = nfs_commitdata_alloc();
        if (dreq->commit_data != NULL)
                dreq->commit_data->req = (struct nfs_page *) dreq;
 }
@@ -617,11 +632,20 @@ static void nfs_direct_write_complete(struct nfs_direct_req *dreq, struct inode
 static void nfs_direct_write_result(struct rpc_task *task, void *calldata)
 {
        struct nfs_write_data *data = calldata;
-       struct nfs_direct_req *dreq = (struct nfs_direct_req *) data->req;
-       int status = task->tk_status;
 
        if (nfs_writeback_done(task, data) != 0)
                return;
+}
+
+/*
+ * NB: Return the value of the first error return code.  Subsequent
+ *     errors after the first one are ignored.
+ */
+static void nfs_direct_write_release(void *calldata)
+{
+       struct nfs_write_data *data = calldata;
+       struct nfs_direct_req *dreq = (struct nfs_direct_req *) data->req;
+       int status = data->task.tk_status;
 
        spin_lock(&dreq->lock);
 
@@ -643,29 +667,22 @@ static void nfs_direct_write_result(struct rpc_task *task, void *calldata)
                                break;
                        case NFS_ODIRECT_DO_COMMIT:
                                if (memcmp(&dreq->verf, &data->verf, sizeof(dreq->verf))) {
-                                       dprintk("NFS: %5u write verify failed\n", task->tk_pid);
+                                       dprintk("NFS: %5u write verify failed\n", data->task.tk_pid);
                                        dreq->flags = NFS_ODIRECT_RESCHED_WRITES;
                                }
                }
        }
 out_unlock:
        spin_unlock(&dreq->lock);
-}
-
-/*
- * NB: Return the value of the first error return code.  Subsequent
- *     errors after the first one are ignored.
- */
-static void nfs_direct_write_release(void *calldata)
-{
-       struct nfs_write_data *data = calldata;
-       struct nfs_direct_req *dreq = (struct nfs_direct_req *) data->req;
 
        if (put_dreq(dreq))
                nfs_direct_write_complete(dreq, data->inode);
 }
 
 static const struct rpc_call_ops nfs_write_direct_ops = {
+#if defined(CONFIG_NFS_V4_1)
+       .rpc_call_prepare = nfs_write_prepare,
+#endif /* CONFIG_NFS_V4_1 */
        .rpc_call_done = nfs_direct_write_result,
        .rpc_release = nfs_direct_write_release,
 };
@@ -718,14 +735,14 @@ static ssize_t nfs_direct_write_schedule_segment(struct nfs_direct_req *dreq,
                                        data->npages, 0, 0, data->pagevec, NULL);
                up_read(&current->mm->mmap_sem);
                if (result < 0) {
-                       nfs_writedata_release(data);
+                       nfs_writedata_free(data);
                        break;
                }
                if ((unsigned)result < data->npages) {
                        bytes = result * PAGE_SIZE;
                        if (bytes <= pgbase) {
                                nfs_direct_release_pages(data->pagevec, result);
-                               nfs_writedata_release(data);
+                               nfs_writedata_free(data);
                                break;
                        }
                        bytes -= pgbase;
@@ -740,7 +757,7 @@ static ssize_t nfs_direct_write_schedule_segment(struct nfs_direct_req *dreq,
                data->inode = inode;
                data->cred = msg.rpc_cred;
                data->args.fh = NFS_FH(inode);
-               data->args.context = get_nfs_open_context(ctx);
+               data->args.context = ctx;
                data->args.offset = pos;
                data->args.pgbase = pgbase;
                data->args.pages = data->pagevec;
@@ -757,8 +774,9 @@ static ssize_t nfs_direct_write_schedule_segment(struct nfs_direct_req *dreq,
                NFS_PROTO(inode)->write_setup(data, &msg);
 
                task = rpc_run_task(&task_setup_data);
-               if (!IS_ERR(task))
-                       rpc_put_task(task);
+               if (IS_ERR(task))
+                       break;
+               rpc_put_task(task);
 
                dprintk("NFS: %5u initiated direct write call "
                        "(req %s/%Ld, %zu bytes @ offset %Lu)\n",
@@ -882,7 +900,7 @@ ssize_t nfs_file_direct_read(struct kiocb *iocb, const struct iovec *iov,
        count = iov_length(iov, nr_segs);
        nfs_add_stats(mapping->host, NFSIOS_DIRECTREADBYTES, count);
 
-       dprintk("nfs: direct read(%s/%s, %zd@%Ld)\n",
+       dfprintk(FILE, "NFS: direct read(%s/%s, %zd@%Ld)\n",
                file->f_path.dentry->d_parent->d_name.name,
                file->f_path.dentry->d_name.name,
                count, (long long) pos);
@@ -917,9 +935,6 @@ out:
  * back into its cache.  We let the server do generic write
  * parameter checking and report problems.
  *
- * We also avoid an unnecessary invocation of generic_osync_inode(),
- * as it is fairly meaningless to sync the metadata of an NFS file.
- *
  * We eliminate local atime updates, see direct read above.
  *
  * We avoid unnecessary page cache invalidations for normal cached
@@ -939,7 +954,7 @@ ssize_t nfs_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
        count = iov_length(iov, nr_segs);
        nfs_add_stats(mapping->host, NFSIOS_DIRECTWRITTENBYTES, count);
 
-       dfprintk(VFS, "nfs: direct write(%s/%s, %zd@%Ld)\n",
+       dfprintk(FILE, "NFS: direct write(%s/%s, %zd@%Ld)\n",
                file->f_path.dentry->d_parent->d_name.name,
                file->f_path.dentry->d_name.name,
                count, (long long) pos);