Changeset bcf23cf in mainline

Timestamp:

2007-09-27T12:38:31Z (17 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

37e7dc54

Parents:

5d4e90f0

Message:

VFS work.
Start support for the Patch Lookup Buffer.
Also add rootfs pointer.

Location:

uspace/srv/vfs

Files:

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

uspace/srv/vfs/Makefile

@@ -43 +43 @@
 SOURCES = \
         vfs.c \
-        vfs_register.c
+        vfs_register.c \
+        vfs_lookup.c \
+        vfs_mount.c
 
 OBJECTS := $(addsuffix .o,$(basename $(SOURCES)))

uspace/srv/vfs/vfs.c

@@ -33 +33 @@
 /**
  * @file        vfs.c
- * @brief       VFS multiplexer for HelenOS.
+ * @brief       VFS service for HelenOS.
  */
 
@@ -42 +42 @@
 #include <stdio.h>
 #include <bool.h>
+#include <string.h>
+#include <as.h>
 #include <libadt/list.h>
 #include "vfs.h"
@@ -109 +111 @@
         printf("VFS: HelenOS VFS server\n");
 
+        /*
+         * Initialize the list of registered file systems.
+         */
         list_initialize(&fs_head);
+
+        /*
+         * Allocate and initialize the Path Lookup Buffer.
+         */
+        list_initialize(&plb_head);
+        plb = as_get_mappable_page(PLB_SIZE);
+//      memset(plb, 0, PLB_SIZE);
+        
+        /*
+         * Set a connectio handling function/fibril.
+         */
         async_set_client_connection(vfs_connection);
+
+        /*
+         * Register at the naming service.
+         */
         ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, &phonead);
+
+        /*
+         * Start accepting connections.
+         */
         async_manager();
         return 0;

uspace/srv/vfs/vfs.h

@@ -37 +37 @@
 #include <libadt/list.h>
 #include <atomic.h>
-#include <types.h>
+#include <sys/types.h>
 
 #define dprintf(...)    printf(__VA_ARGS__)
@@ -44 +44 @@
 
 #define IPC_METHOD_TO_VFS_OP(m) ((m) - VFS_FIRST)       
-
-typedef int64_t off_t;
 
 typedef enum {
@@ -126 +124 @@
 } vfs_file_t;
 
-extern link_t fs_head;
+extern link_t fs_head;          /**< List of registered file systems. */
 
-extern void vfs_register(ipc_callid_t rid, ipc_call_t *request);
+extern vfs_node_t *rootfs;      /**< Root node of the root file system. */
+
+#define MAX_PATH_LEN            (64 * 1024)
+
+#define PLB_SIZE                (2 * MAX_PATH_LEN)
+
+/** Each instance of this type describes one path lookup in progress. */
+typedef struct {
+        link_t  plb_link;       /**< Active PLB entries list link. */
+        unsigned index;         /**< Index of the first character in PLB. */
+        size_t len;             /**< Number of characters in this PLB entry. */
+} plb_entry_t;
+
+extern atomic_t plb_futex;      /**< Futex protecting plb and plb_head. */
+extern uint8_t *plb;            /**< Path Lookup Buffer */
+extern link_t plb_head;         /**< List of active PLB entries. */
+
+extern void vfs_register(ipc_callid_t, ipc_call_t *);
+extern void vfs_lookup(ipc_callid_t, ipc_call_t *);
 
 #endif