feat: ability to evict dnode and inode cache

[lunaix-os.git] / lunaix-os / includes / lunaix / fs.h

diff --git a/lunaix-os/includes/lunaix/fs.h b/lunaix-os/includes/lunaix/fs.h
index fcca8abaa513c4caee6917d04432c56521186ba2..c80eb229aa7eb725ad88e52421aa404278d21691 100644 (file)
--- a/lunaix-os/includes/lunaix/fs.h
+++ b/lunaix-os/includes/lunaix/fs.h
@@ -48,6 +48,7 @@ struct filesystem
     struct hlist_node fs_list;
     struct hstr fs_name;
     uint32_t types;
+    int fs_id; // can be used to detect fs type on partition
     int (*mount)(struct v_superblock* vsb, struct v_dnode* mount_point);
     int (*unmount)(struct v_superblock* vsb);
 };
@@ -116,6 +117,8 @@ struct v_inode
     uint32_t link_count;
     uint32_t lb_usage;
     uint32_t fsize;
+    struct hlist_node hash_list;
+    struct lru_node lru;
     struct pcache* pg_cache;
     void* data; // 允许底层FS绑定他的一些专有数据
     struct
@@ -124,11 +127,11 @@ struct v_inode
         int (*open)(struct v_inode* this, struct v_file* file);
         int (*sync)(struct v_inode* this);
         int (*mkdir)(struct v_inode* this, struct v_dnode* dnode);
-        int (*rmdir)(struct v_inode* this);
+        int (*rmdir)(struct v_inode* this, struct v_dnode* dir);
         int (*unlink)(struct v_inode* this);
         int (*link)(struct v_inode* this, struct v_dnode* new_name);
         int (*read_symlink)(struct v_inode* this, const char** path_out);
-        int (*symlink)(struct v_inode* this, const char* target);
+        int (*set_symlink)(struct v_inode* this, const char* target);
         int (*dir_lookup)(struct v_inode* this, struct v_dnode* dnode);
         int (*rename)(struct v_inode* from_inode,
                       struct v_dnode* from_dnode,
@@ -140,6 +143,7 @@ struct v_inode
 struct v_dnode
 {
     mutex_t lock; // sync the path walking
+    struct lru_node lru;
     struct hstr name;
     struct v_inode* inode;
     struct v_dnode* parent;
@@ -155,16 +159,6 @@ struct v_fdtable
     struct v_fd* fds[VFS_MAX_FD];
 };
 
-struct pcache_pg
-{
-    struct llist_header pg_list;
-    struct llist_header dirty_list;
-    struct lru_node lru;
-    void* pg;
-    uint32_t flags;
-    uint32_t fpos;
-};
-
 struct pcache
 {
     struct v_inode* master;
@@ -175,6 +169,16 @@ struct pcache
     uint32_t n_pages;
 };
 
+struct pcache_pg
+{
+    struct llist_header pg_list;
+    struct llist_header dirty_list;
+    struct lru_node lru;
+    struct pcache* holder;
+    void* pg;
+    uint32_t flags;
+    uint32_t fpos;
+};
 /* --- file system manager --- */
 void
 fsm_init();
@@ -227,6 +231,9 @@ vfs_close(struct v_file* file);
 int
 vfs_fsync(struct v_file* file);
 
+void
+vfs_assign_inode(struct v_dnode* assign_to, struct v_inode* inode);
+
 struct v_superblock*
 vfs_sb_alloc();
 
@@ -240,7 +247,7 @@ void
 vfs_d_free(struct v_dnode* dnode);
 
 struct v_inode*
-vfs_i_alloc();
+vfs_i_alloc(dev_t device_id, uint32_t inode_id);
 
 void
 vfs_i_free(struct v_inode* inode);