Changeset 320c884 in mainline for uspace/srv/vfs/vfs.h

Timestamp:

2007-11-04T19:47:32Z (18 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

798f364

Parents:

89cb140

Message:

A lot of more VFS prototyping.
VFS_OPEN gets reasonably complete, fix a limitation that prevented file
structures from being shared by multiple file descriptors, add functions for
file descriptor management, introduce unlink_futex and two new VFS operations
VFS_UNLINK and VFS_RENAME.

File:

• uspace/srv/vfs/vfs.h (modified) (5 diffs)

uspace/srv/vfs/vfs.h

@@ -57 +57 @@
         VFS_WRITE,
         VFS_SEEK,
+        VFS_RENAME,
+        VFS_UNLINK,
         VFS_LAST,               /* keep this the last member of the enum */
 } vfs_request_t;
@@ -131 +133 @@
 typedef struct {
         VFS_TRIPLET;            /**< Identity of the node. */
-        atomic_t refcnt;        /**< Usage counter. */
+        unsigned refcnt;        /**< Usage counter. */
+        link_t nh_link;         /**< Node hash-table link. */
 } vfs_node_t;
 
@@ -142 +145 @@
         
         /** Number of file handles referencing this file. */
-        atomic_t refcnt;
+        unsigned refcnt;
 
         /** Current position in the file. */
@@ -167 +170 @@
 extern link_t plb_head;         /**< List of active PLB entries. */
 
+extern atomic_t unlink_futex;   /**< VFS_{CREATE|OPEN|UNLINK} serialization. */
+
 extern int vfs_grab_phone(int);
 extern void vfs_release_phone(int);
@@ -173 +178 @@
 
 extern int vfs_lookup_internal(char *, size_t, vfs_triplet_t *, vfs_pair_t *);
+
+
 extern vfs_node_t *vfs_node_get(vfs_triplet_t *);
+extern void vfs_node_put(vfs_node_t *);
+
+extern bool vfs_files_init(void);
+extern vfs_file_t *vfs_file_get(int);
+extern int vfs_fd_alloc(void);
+extern void vfs_fd_free(int);
+
+extern void vfs_file_addref(vfs_file_t *);
+extern void vfs_file_delref(vfs_file_t *);
+
+extern void vfs_node_addref(vfs_node_t *);
+extern void vfs_node_delref(vfs_node_t *);
 
 #define MAX_OPEN_FILES  128