X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/c6de44b989e9d7286337e4cbf4d82d919f9120e6..1e54f1850eda97e3b41c302b72c07a1f9cc4d637:/lunaix-os/includes/lunaix/fs.h

diff --git a/lunaix-os/includes/lunaix/fs.h b/lunaix-os/includes/lunaix/fs.h
index cc850ad..024b4ea 100644
--- a/lunaix-os/includes/lunaix/fs.h
+++ b/lunaix-os/includes/lunaix/fs.h
@@ -120,6 +120,16 @@ struct v_file_ops
 {
     int (*write)(struct v_inode* inode, void* buffer, size_t len, size_t fpos);
     int (*read)(struct v_inode* inode, void* buffer, size_t len, size_t fpos);
+
+    // for operatiosn {write|read}_page, following are true:
+    //  + `len` always equals to PG_SIZE
+    //  + `fpos` always PG_SIZE aligned.
+    // These additional operations allow underlying fs to use more specialized
+    // and optimized code.
+
+    int (*write_page)(struct v_inode* inode, void* pg, size_t len, size_t fpos);
+    int (*read_page)(struct v_inode* inode, void* pg, size_t len, size_t fpos);
+
     int (*readdir)(struct v_file* file, struct dir_context* dctx);
     int (*seek)(struct v_inode* inode, size_t offset); // optional
     int (*close)(struct v_file* file);
@@ -173,7 +183,8 @@ struct v_fd
     int flags;
 };
 
-// FIXME how do we invalidate corresponding v_dnodes given the v_inode?
+//  [v_inode::aka_nodes]
+//  how do we invalidate corresponding v_dnodes given the v_inode?
 /*
     Consider taskfs, which is Lunaix's speak of Linux's procfs, that allow
     info of every process being accessible via file system. Each process's