Changeset 5b890cfd in mainline

Timestamp:

2007-09-29T18:11:48Z (17 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

dab65b9

Parents:

d7b5cf2

Message:

VFS work.
Start VFS_OPEN.

Location:

uspace/srv/vfs

Files:

• Makefile (modified) (1 diff)
• vfs.c (modified) (3 diffs)
• vfs.h (modified) (1 diff)
• vfs_open.c (added)

uspace/srv/vfs/Makefile

@@ -45 +45 @@
         vfs_register.c \
         vfs_lookup.c \
-        vfs_mount.c
+        vfs_mount.c \
+        vfs_open.c
 
 OBJECTS := $(addsuffix .o,$(basename $(SOURCES)))

uspace/srv/vfs/vfs.c

@@ -57 +57 @@
 
         /*
+         * Initialize the table of open files.
+         */
+        if (!vfs_conn_open_files_init()) {
+                ipc_answer_fast(iid, ENOMEM, 0, 0);
+                return;
+        }
+
+        /*
          * The connection was opened via the IPC_CONNECT_ME_TO call.
          * This call needs to be answered.
@@ -65 +73 @@
          * Here we enter the main connection fibril loop.
          * The logic behind this loop and the protocol is that we'd like to keep
-         * each connection open for a while before we close it. The benefit of
-         * this is that the client doesn't have to establish a new connection
-         * upon each request.  On the other hand, the client must be ready to
-         * re-establish a connection if we hang it up due to reaching of maximum
-         * number of requests per connection or due to the client timing out.
+         * each connection open until the client hangs up. When the client hangs
+         * up, we will free its VFS state. The act of hanging up the connection
+         * by the client is equivalent to client termination because we cannot
+         * distinguish one from the other. On the other hand, the client can
+         * hang up arbitrarily if it has no open files and reestablish the
+         * connection later.
          */
-         
         while (keep_on_going) {
                 ipc_callid_t callid;
@@ -86 +94 @@
                 case VFS_REGISTER:
                         vfs_register(callid, &call);
-                        keep_on_going = false;
                         break;
                 case VFS_MOUNT:

uspace/srv/vfs/vfs.h

@@ -153 +153 @@
 extern int vfs_lookup_internal(char *, size_t, vfs_node_t *, vfs_node_t *);
 
+#define MAX_OPEN_FILES  128     
+
+extern bool vfs_conn_open_files_init(void);
+
 extern void vfs_register(ipc_callid_t, ipc_call_t *);
 extern void vfs_mount(ipc_callid_t, ipc_call_t *);
+extern void vfs_open(ipc_callid_t, ipc_call_t *);
 
 #endif