Changeset 9dc6083 in mainline for uspace/srv/vfs/vfs_ops.c

Timestamp:

2013-07-06T15:53:01Z (12 years ago)

Author:

Manuele Conti <conti.ma@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

11baebb

Parents:

66366470

Message:

Implement statfs operation.

File:

• uspace/srv/vfs/vfs_ops.c (modified) (1 diff)

uspace/srv/vfs/vfs_ops.c

@@ -1420 +1420 @@
 void vfs_statfs(ipc_callid_t rid, ipc_call_t *request)
 {
-        long long reply;
-
-        /* Get information about fs */
-        reply = 512;
-        async_answer_1(rid, EOK, reply);
+        char *path;
+        int rc = async_data_write_accept((void **) &path, true, 0, 0, 0, NULL);
+        if (rc != EOK) {
+                async_answer_0(rid, rc);
+                return;
+        }
+        
+        ipc_callid_t callid;
+        if (!async_data_read_receive(&callid, NULL)) {
+                free(path);
+                async_answer_0(callid, EINVAL);
+                async_answer_0(rid, EINVAL);
+                return;
+        }
+
+        vfs_lookup_res_t lr;
+        fibril_rwlock_read_lock(&namespace_rwlock);
+        rc = vfs_lookup_internal(path, L_NONE, &lr, NULL);
+        free(path);
+        if (rc != EOK) {
+                fibril_rwlock_read_unlock(&namespace_rwlock);
+                async_answer_0(callid, rc);
+                async_answer_0(rid, rc);
+                return;
+        }
+        vfs_node_t *node = vfs_node_get(&lr);
+        if (!node) {
+                fibril_rwlock_read_unlock(&namespace_rwlock);
+                async_answer_0(callid, ENOMEM);
+                async_answer_0(rid, ENOMEM);
+                return;
+        }
+
+        fibril_rwlock_read_unlock(&namespace_rwlock);
+
+        async_exch_t *exch = vfs_exchange_grab(node->fs_handle);
+        
+        aid_t msg;
+        msg = async_send_3(exch, VFS_OUT_STATFS, node->service_id,
+            node->index, false, NULL);
+        async_forward_fast(callid, exch, 0, 0, 0, IPC_FF_ROUTE_FROM_ME);
+        
+        vfs_exchange_release(exch);
+        
+        sysarg_t rv;
+        async_wait_for(msg, &rv);
+
+        async_answer_0(rid, rv);
+
+        vfs_node_put(node);
 }