refactor: make pci device driver loading passive, pci bus scanner will not load them...

[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 539f0a8aa0d8ccd658e522751319606440f936b8..1fe37f1562c4976e21f82216c5562d06fb6f26aa 100644 (file)
--- a/lunaix-os/includes/lunaix/fs.h
+++ b/lunaix-os/includes/lunaix/fs.h
@@ -6,25 +6,42 @@
 #include <lunaix/ds/btrie.h>
 #include <lunaix/ds/hashtable.h>
 #include <lunaix/ds/hstr.h>
 #include <lunaix/ds/btrie.h>
 #include <lunaix/ds/hashtable.h>
 #include <lunaix/ds/hstr.h>

+#include <lunaix/ds/ldga.h>

 #include <lunaix/ds/llist.h>
 #include <lunaix/ds/lru.h>
 #include <lunaix/ds/mutex.h>
 #include <lunaix/ds/llist.h>
 #include <lunaix/ds/lru.h>
 #include <lunaix/ds/mutex.h>

-#include <lunaix/process.h>

 #include <lunaix/status.h>
 #include <lunaix/status.h>

+

 #include <stdatomic.h>
 
 #include <stdatomic.h>
 

+#include <usr/lunaix/fstypes.h>
+

 #define VFS_NAME_MAXLEN 128
 #define VFS_MAX_FD 32
 
 #define VFS_NAME_MAXLEN 128
 #define VFS_MAX_FD 32
 

-#define VFS_IFDIR 0x1
-#define VFS_IFFILE 0x2
-#define VFS_IFSEQDEV 0x4
-#define VFS_IFVOLDEV 0x8
-#define VFS_IFSYMLINK 0x16
+#define VFS_IFDIR F_DIR
+#define VFS_IFFILE F_FILE
+#define VFS_IFDEV (F_DEV | F_FILE)
+#define VFS_IFSEQDEV (F_SEQDEV | F_FILE)
+#define VFS_IFVOLDEV (F_VOLDEV | F_FILE)
+#define VFS_IFSYMLINK (F_SYMLINK | F_FILE)
+
+#define VFS_DEVFILE(type) ((type) & F_DEV)
+#define VFS_DEVTYPE(type) ((type) & ((F_SEQDEV | F_VOLDEV) ^ F_DEV))

 
 

+// Walk, mkdir if component encountered is non-exists.

 #define VFS_WALK_MKPARENT 0x1
 #define VFS_WALK_MKPARENT 0x1

+
+// Walk, relative to current FS.

 #define VFS_WALK_FSRELATIVE 0x2
 #define VFS_WALK_FSRELATIVE 0x2

+
+/*
+    Terminate the walk on the immediate parent,
+    name of child (last component) is returned through `component`
+*/

 #define VFS_WALK_PARENT 0x4
 #define VFS_WALK_PARENT 0x4

+
+// Do not follow the symbolic link

 #define VFS_WALK_NOFOLLOW 0x8
 
 #define VFS_HASHTABLE_BITS 10
 #define VFS_WALK_NOFOLLOW 0x8
 
 #define VFS_HASHTABLE_BITS 10


@@ -36,11 +53,11 @@
 
 #define FSTYPE_ROFS 0x1
 
 
 #define FSTYPE_ROFS 0x1
 

-#define DO_STATUS(errno) SYSCALL_ESTATUS(__current->k_status = errno)
-#define DO_STATUS_OR_RETURN(errno) ({ errno < 0 ? DO_STATUS(errno) : errno; })
-

 #define TEST_FD(fd) (fd >= 0 && fd < VFS_MAX_FD)
 
 #define TEST_FD(fd) (fd >= 0 && fd < VFS_MAX_FD)
 

+#define EXPORT_FILE_SYSTEM(fs_id, init_fn)                                     \
+    export_ldga_el(fs, fs_id, ptr_t, init_fn)
+

 #define VFS_VALID_CHAR(chr)                                                    \
     (('A' <= (chr) && (chr) <= 'Z') || ('a' <= (chr) && (chr) <= 'z') ||       \
      ('0' <= (chr) && (chr) <= '9') || (chr) == '.' || (chr) == '_' ||         \
 #define VFS_VALID_CHAR(chr)                                                    \
     (('A' <= (chr) && (chr) <= 'Z') || ('a' <= (chr) && (chr) <= 'z') ||       \
      ('0' <= (chr) && (chr) <= '9') || (chr) == '.' || (chr) == '_' ||         \


@@ -60,7 +77,7 @@
         lru_use_one(dnode_lru, &dnode->lru);                                   \
     })
 
         lru_use_one(dnode_lru, &dnode->lru);                                   \
     })
 

-typedef uint32_t inode_t;
+typedef u32_t inode_t;

 
 struct v_dnode;
 struct v_inode;
 
 struct v_dnode;
 struct v_inode;


@@ -83,7 +100,7 @@ struct filesystem
 {
     struct hlist_node fs_list;
     struct hstr fs_name;
 {
     struct hlist_node fs_list;
     struct hstr fs_name;

-    uint32_t types;
+    u32_t types;

     int fs_id;
     int (*mount)(struct v_superblock* vsb, struct v_dnode* mount_point);
     int (*unmount)(struct v_superblock* vsb);
     int fs_id;
     int (*mount)(struct v_superblock* vsb, struct v_dnode* mount_point);
     int (*unmount)(struct v_superblock* vsb);


@@ -95,12 +112,13 @@ struct v_superblock
     struct device* dev;
     struct v_dnode* root;
     struct filesystem* fs;
     struct device* dev;
     struct v_dnode* root;
     struct filesystem* fs;

-    uint32_t iobuf_size;

     struct hbucket* i_cache;
     struct hbucket* i_cache;

+    void* data;
+    size_t blksize;

     struct
     {
     struct
     {

-        uint32_t (*read_capacity)(struct v_superblock* vsb);
-        uint32_t (*read_usage)(struct v_superblock* vsb);
+        u32_t (*read_capacity)(struct v_superblock* vsb);
+        u32_t (*read_usage)(struct v_superblock* vsb);

         void (*init_inode)(struct v_superblock* vsb, struct v_inode* inode);
     } ops;
 };
         void (*init_inode)(struct v_superblock* vsb, struct v_inode* inode);
     } ops;
 };


@@ -119,6 +137,16 @@ 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);
 {
     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 fpos);
+    int (*read_page)(struct v_inode* inode, void* pg, 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);
     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);


@@ -161,7 +189,7 @@ struct v_file
     struct v_inode* inode;
     struct v_dnode* dnode;
     struct llist_header* f_list;
     struct v_inode* inode;
     struct v_dnode* dnode;
     struct llist_header* f_list;

-    uint32_t f_pos;
+    u32_t f_pos;

     atomic_ulong ref_count;
     struct v_file_ops* ops; // for caching
 };
     atomic_ulong ref_count;
     struct v_file_ops* ops; // for caching
 };


@@ -172,7 +200,8 @@ struct v_fd
     int flags;
 };
 
     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
 /*
     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


@@ -188,15 +217,15 @@ struct v_inode
 {
     inode_t id;
     mutex_t lock;
 {
     inode_t id;
     mutex_t lock;

-    uint32_t itype;
+    u32_t itype;

     time_t ctime;
     time_t mtime;
     time_t atime;
     lba_t lb_addr;
     time_t ctime;
     time_t mtime;
     time_t atime;
     lba_t lb_addr;

-    uint32_t open_count;
-    uint32_t link_count;
-    uint32_t lb_usage;
-    uint32_t fsize;
+    u32_t open_count;
+    u32_t link_count;
+    u32_t lb_usage;
+    u32_t fsize;

     void* data; // 允许底层FS绑定他的一些专有数据
     struct llist_header aka_dnodes;
     struct llist_header xattrs;
     void* data; // 允许底层FS绑定他的一些专有数据
     struct llist_header aka_dnodes;
     struct llist_header xattrs;


@@ -206,6 +235,8 @@ struct v_inode
     struct pcache* pg_cache;
     struct v_inode_ops* ops;
     struct v_file_ops* default_fops;
     struct pcache* pg_cache;
     struct v_inode_ops* ops;
     struct v_file_ops* default_fops;

+
+    void (*destruct)(struct v_inode* inode);

 };
 
 struct v_mount
 };
 
 struct v_mount


@@ -217,7 +248,7 @@ struct v_mount
     struct v_mount* parent;
     struct v_dnode* mnt_point;
     struct v_superblock* super_block;
     struct v_mount* parent;
     struct v_dnode* mnt_point;
     struct v_superblock* super_block;

-    uint32_t busy_counter;
+    u32_t busy_counter;

     int flags;
 };
 
     int flags;
 };
 


@@ -250,8 +281,8 @@ struct pcache
     struct btrie tree;
     struct llist_header pages;
     struct llist_header dirty;
     struct btrie tree;
     struct llist_header pages;
     struct llist_header dirty;

-    uint32_t n_dirty;
-    uint32_t n_pages;
+    u32_t n_dirty;
+    u32_t n_pages;

 };
 
 struct pcache_pg
 };
 
 struct pcache_pg


@@ -261,8 +292,9 @@ struct pcache_pg
     struct lru_node lru;
     struct pcache* holder;
     void* pg;
     struct lru_node lru;
     struct pcache* holder;
     void* pg;

-    uint32_t flags;
-    uint32_t fpos;
+    u32_t flags;
+    u32_t fpos;
+    u32_t len;

 };
 
 void
 };
 
 void


@@ -341,6 +373,9 @@ vfs_pclose(struct v_file* file, pid_t pid);
 int
 vfs_close(struct v_file* file);
 
 int
 vfs_close(struct v_file* file);
 

+void
+vfs_free_fd(struct v_fd* fd);
+

 int
 vfs_fsync(struct v_file* file);
 
 int
 vfs_fsync(struct v_file* file);
 


@@ -360,7 +395,7 @@ void
 vfs_d_free(struct v_dnode* dnode);
 
 struct v_inode*
 vfs_d_free(struct v_dnode* dnode);
 
 struct v_inode*

-vfs_i_find(struct v_superblock* sb, uint32_t i_id);
+vfs_i_find(struct v_superblock* sb, u32_t i_id);

 
 void
 vfs_i_addhash(struct v_inode* inode);
 
 void
 vfs_i_addhash(struct v_inode* inode);


@@ -383,6 +418,9 @@ vfs_get_dtype(int itype);
 void
 vfs_ref_dnode(struct v_dnode* dnode);
 
 void
 vfs_ref_dnode(struct v_dnode* dnode);
 

+void
+vfs_ref_file(struct v_file* file);
+

 void
 vfs_unref_dnode(struct v_dnode* dnode);
 
 void
 vfs_unref_dnode(struct v_dnode* dnode);
 


@@ -396,22 +434,22 @@ void
 pcache_release_page(struct pcache* pcache, struct pcache_pg* page);
 
 struct pcache_pg*
 pcache_release_page(struct pcache* pcache, struct pcache_pg* page);
 
 struct pcache_pg*

-pcache_new_page(struct pcache* pcache, uint32_t index);
+pcache_new_page(struct pcache* pcache, u32_t index);

 
 void
 pcache_set_dirty(struct pcache* pcache, struct pcache_pg* pg);
 
 int
 pcache_get_page(struct pcache* pcache,
 
 void
 pcache_set_dirty(struct pcache* pcache, struct pcache_pg* pg);
 
 int
 pcache_get_page(struct pcache* pcache,

-                uint32_t index,
-                uint32_t* offset,
+                u32_t index,
+                u32_t* offset,

                 struct pcache_pg** page);
 
 int
                 struct pcache_pg** page);
 
 int

-pcache_write(struct v_inode* inode, void* data, uint32_t len, uint32_t fpos);
+pcache_write(struct v_inode* inode, void* data, u32_t len, u32_t fpos);

 
 int
 
 int

-pcache_read(struct v_inode* inode, void* data, uint32_t len, uint32_t fpos);
+pcache_read(struct v_inode* inode, void* data, u32_t len, u32_t fpos);

 
 void
 pcache_release(struct pcache* pcache);
 
 void
 pcache_release(struct pcache* pcache);


@@ -459,6 +497,12 @@ default_file_write(struct v_inode* inode,
                    size_t len,
                    size_t fpos);
 
                    size_t len,
                    size_t fpos);
 

+int
+default_file_read_page(struct v_inode* inode, void* buffer, size_t fpos);
+
+int
+default_file_write_page(struct v_inode* inode, void* buffer, size_t fpos);
+

 int
 default_file_readdir(struct v_file* file, struct dir_context* dctx);
 
 int
 default_file_readdir(struct v_file* file, struct dir_context* dctx);