feat: (twimap) provide an easy way for mapping kernel objects into filesystem

[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 d43293be06075be91f99f368c1205480bb87f263..b497954abce0373140bc97cf4f800dfab89f8561 100644 (file)
--- a/lunaix-os/includes/lunaix/fs.h
+++ b/lunaix-os/includes/lunaix/fs.h
@@ -9,6 +9,7 @@
 #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 <stdatomic.h>
 
 #include <lunaix/status.h>
 #include <stdatomic.h>
 


@@ -31,6 +32,8 @@
 #define VFS_HASH_MASK (VFS_HASHTABLE_SIZE - 1)
 #define VFS_HASHBITS (32 - VFS_HASHTABLE_BITS)
 
 #define VFS_HASH_MASK (VFS_HASHTABLE_SIZE - 1)
 #define VFS_HASHBITS (32 - VFS_HASHTABLE_BITS)
 

+#define VFS_PATH_DELIM '/'
+

 #define FSTYPE_ROFS 0x1
 
 #define DO_STATUS(errno) SYSCALL_ESTATUS(__current->k_status = errno)
 #define FSTYPE_ROFS 0x1
 
 #define DO_STATUS(errno) SYSCALL_ESTATUS(__current->k_status = errno)


@@ -41,7 +44,21 @@
 #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) == '_' ||         \

-     (chr) == '-')
+     (chr) == '-' || (chr) == ':')
+
+#define unlock_inode(inode) mutex_unlock(&inode->lock)
+#define lock_inode(inode)                                                      \
+    ({                                                                         \
+        mutex_lock(&inode->lock);                                              \
+        lru_use_one(inode_lru, &inode->lru);                                   \
+    })
+
+#define unlock_dnode(dnode) mutex_unlock(&dnode->lock)
+#define lock_dnode(dnode)                                                      \
+    ({                                                                         \
+        mutex_lock(&dnode->lock);                                              \
+        lru_use_one(dnode_lru, &dnode->lru);                                   \
+    })

 
 typedef uint32_t inode_t;
 
 
 typedef uint32_t inode_t;
 


@@ -53,6 +70,7 @@ struct v_file_ops;
 struct v_inode_ops;
 struct v_fd;
 struct pcache;
 struct v_inode_ops;
 struct v_fd;
 struct pcache;

+struct v_xattr_entry;

 
 extern struct v_file_ops default_file_ops;
 extern struct v_inode_ops default_inode_ops;
 
 extern struct v_file_ops default_file_ops;
 extern struct v_inode_ops default_inode_ops;


@@ -102,7 +120,7 @@ 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 (*readdir)(struct v_file* file, struct dir_context* dctx);
     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 (*readdir)(struct v_file* file, struct dir_context* dctx);

-    int (*seek)(struct v_inode* inode, size_t offset);
+    int (*seek)(struct v_inode* inode, size_t offset); // optional

     int (*close)(struct v_file* file);
     int (*sync)(struct v_file* file);
 };
     int (*close)(struct v_file* file);
     int (*sync)(struct v_file* file);
 };


@@ -122,6 +140,20 @@ struct v_inode_ops
     int (*rename)(struct v_inode* from_inode,
                   struct v_dnode* from_dnode,
                   struct v_dnode* to_dnode);
     int (*rename)(struct v_inode* from_inode,
                   struct v_dnode* from_dnode,
                   struct v_dnode* to_dnode);

+    int (*getxattr)(struct v_inode* this,
+                    struct v_xattr_entry* entry); // optional
+    int (*setxattr)(struct v_inode* this,
+                    struct v_xattr_entry* entry); // optional
+    int (*delxattr)(struct v_inode* this,
+                    struct v_xattr_entry* entry); // optional
+};
+
+struct v_xattr_entry
+{
+    struct llist_header entries;
+    struct hstr name;
+    const void* value;
+    size_t len;

 };
 
 struct v_file
 };
 
 struct v_file


@@ -153,6 +185,7 @@ struct v_inode
     uint32_t link_count;
     uint32_t lb_usage;
     uint32_t fsize;
     uint32_t link_count;
     uint32_t lb_usage;
     uint32_t fsize;

+    struct llist_header xattrs;

     struct v_superblock* sb;
     struct hlist_node hash_list;
     struct lru_node lru;
     struct v_superblock* sb;
     struct hlist_node hash_list;
     struct lru_node lru;


@@ -172,6 +205,7 @@ struct v_mount
     struct v_dnode* mnt_point;
     struct v_superblock* super_block;
     uint32_t busy_counter;
     struct v_dnode* mnt_point;
     struct v_superblock* super_block;
     uint32_t busy_counter;

+    int flags;

 };
 
 struct v_dnode
 };
 
 struct v_dnode


@@ -241,6 +275,12 @@ vfs_dcache_lookup(struct v_dnode* parent, struct hstr* str);
 void
 vfs_dcache_add(struct v_dnode* parent, struct v_dnode* dnode);
 
 void
 vfs_dcache_add(struct v_dnode* parent, struct v_dnode* dnode);
 

+void
+vfs_dcache_rehash(struct v_dnode* new_parent, struct v_dnode* dnode);
+
+void
+vfs_dcache_remove(struct v_dnode* dnode);
+

 int
 vfs_walk(struct v_dnode* start,
          const char* path,
 int
 vfs_walk(struct v_dnode* start,
          const char* path,


@@ -249,7 +289,16 @@ vfs_walk(struct v_dnode* start,
          int walk_options);
 
 int
          int walk_options);
 
 int

-vfs_mount(const char* target, const char* fs_name, struct device* device);
+vfs_walk_proc(const char* path,
+              struct v_dnode** dentry,
+              struct hstr* component,
+              int options);
+
+int
+vfs_mount(const char* target,
+          const char* fs_name,
+          struct device* device,
+          int options);

 
 int
 vfs_unmount(const char* target);
 
 int
 vfs_unmount(const char* target);


@@ -257,7 +306,8 @@ vfs_unmount(const char* target);
 int
 vfs_mount_at(const char* fs_name,
              struct device* device,
 int
 vfs_mount_at(const char* fs_name,
              struct device* device,

-             struct v_dnode* mnt_point);
+             struct v_dnode* mnt_point,
+             int options);

 
 int
 vfs_unmount_at(struct v_dnode* mnt_point);
 
 int
 vfs_unmount_at(struct v_dnode* mnt_point);


@@ -304,6 +354,9 @@ vfs_i_free(struct v_inode* inode);
 int
 vfs_dup_fd(struct v_fd* old, struct v_fd** new);
 
 int
 vfs_dup_fd(struct v_fd* old, struct v_fd** new);
 

+int
+vfs_getfd(int fd, struct v_fd** fd_s);
+

 void
 pcache_init(struct pcache* pcache);
 
 void
 pcache_init(struct pcache* pcache);
 


@@ -316,7 +369,7 @@ pcache_new_page(struct pcache* pcache, uint32_t index);
 void
 pcache_set_dirty(struct pcache* pcache, struct pcache_pg* pg);
 
 void
 pcache_set_dirty(struct pcache* pcache, struct pcache_pg* pg);
 

-struct pcache_pg*
+int

 pcache_get_page(struct pcache* pcache,
                 uint32_t index,
                 uint32_t* offset,
 pcache_get_page(struct pcache* pcache,
                 uint32_t index,
                 uint32_t* offset,


@@ -362,6 +415,9 @@ vfs_mount_root(const char* fs_name, struct device* device);
 struct v_mount*
 vfs_create_mount(struct v_mount* parent, struct v_dnode* mnt_point);
 
 struct v_mount*
 vfs_create_mount(struct v_mount* parent, struct v_dnode* mnt_point);
 

+int
+vfs_check_writable(struct v_dnode* dnode);
+

 int
 default_file_read(struct v_inode* inode, void* buffer, size_t len, size_t fpos);
 
 int
 default_file_read(struct v_inode* inode, void* buffer, size_t len, size_t fpos);
 


@@ -397,4 +453,13 @@ default_inode_rmdir(struct v_inode* this, struct v_dnode* dir);
 int
 default_inode_mkdir(struct v_inode* this, struct v_dnode* dir);
 
 int
 default_inode_mkdir(struct v_inode* this, struct v_dnode* dir);
 

+struct v_xattr_entry*
+xattr_new(struct hstr* name);
+
+struct v_xattr_entry*
+xattr_getcache(struct v_inode* inode, struct hstr* name);
+
+void
+xattr_addcache(struct v_inode* inode, struct v_xattr_entry* xattr);
+

 #endif /* __LUNAIX_VFS_H */
 #endif /* __LUNAIX_VFS_H */