feat: fstat now handle symbolic link

[lunaix-os.git] / lunaix-os / kernel / device / devfs.c

diff --git a/lunaix-os/kernel/device/devfs.c b/lunaix-os/kernel/device/devfs.c
index 0448924083fa603413b73a415b3fa669b2aca610..1a49b0519ebdca9882b67baae30cf661ec6a4762 100644 (file)
--- a/lunaix-os/kernel/device/devfs.c
+++ b/lunaix-os/kernel/device/devfs.c
@@ -3,6 +3,8 @@
 #include <lunaix/fs/devfs.h>
 #include <lunaix/spike.h>
 
+#include <usr/lunaix/dirent_defs.h>
+
 extern struct v_inode_ops devfs_inode_ops;
 extern struct v_file_ops devfs_file_ops;
 
@@ -13,11 +15,11 @@ devfs_read(struct v_inode* inode, void* buffer, size_t len, size_t fpos)
 
     struct device* dev = (struct device*)inode->data;
 
-    if (!dev->read) {
+    if (!dev->ops.read) {
         return ENOTSUP;
     }
 
-    return dev->read(dev, buffer, fpos, len);
+    return dev->ops.read(dev, buffer, fpos, len);
 }
 
 int
@@ -27,11 +29,39 @@ devfs_write(struct v_inode* inode, void* buffer, size_t len, size_t fpos)
 
     struct device* dev = (struct device*)inode->data;
 
-    if (!dev->write) {
+    if (!dev->ops.write) {
+        return ENOTSUP;
+    }
+
+    return dev->ops.write(dev, buffer, fpos, len);
+}
+
+int
+devfs_read_page(struct v_inode* inode, void* buffer, size_t len, size_t fpos)
+{
+    assert(inode->data);
+
+    struct device* dev = (struct device*)inode->data;
+
+    if (!dev->ops.read_page) {
         return ENOTSUP;
     }
 
-    return dev->write(dev, buffer, fpos, len);
+    return dev->ops.read_page(dev, buffer, fpos);
+}
+
+int
+devfs_write_page(struct v_inode* inode, void* buffer, size_t len, size_t fpos)
+{
+    assert(inode->data);
+
+    struct device* dev = (struct device*)inode->data;
+
+    if (!dev->ops.read_page) {
+        return ENOTSUP;
+    }
+
+    return dev->ops.read_page(dev, buffer, fpos);
 }
 
 int
@@ -43,21 +73,35 @@ devfs_get_itype(struct device* dev)
         itype = VFS_IFDIR;
     } else if (dev_if == DEV_IFVOL) {
         itype |= VFS_IFVOLDEV;
-    } else {
+    } else if (dev_if == DEV_IFSEQ) {
         itype |= VFS_IFSEQDEV;
+    } else {
+        itype |= VFS_IFDEV;
     }
     return itype;
 }
 
+int
+devfs_get_dtype(struct device* dev)
+{
+    switch (dev->dev_type & DEV_MSKIF) {
+        case DEV_IFCAT:
+            return DT_DIR;
+
+        default:
+            return DT_FILE;
+    }
+}
+
 int
 devfs_mknod(struct v_dnode* dnode, struct device* dev)
 {
     assert(dev);
 
-    struct v_inode* devnod = vfs_i_find(dnode->super_block, dev->dev_id);
+    struct v_inode* devnod = vfs_i_find(dnode->super_block, dev->dev_uid);
     if (!devnod) {
         if ((devnod = vfs_i_alloc(dnode->super_block))) {
-            devnod->id = dev->dev_id;
+            devnod->id = dev->dev_uid;
             devnod->data = dev;
             devnod->itype = devfs_get_itype(dev);
 
@@ -74,7 +118,8 @@ devfs_mknod(struct v_dnode* dnode, struct device* dev)
 int
 devfs_dirlookup(struct v_inode* this, struct v_dnode* dnode)
 {
-    struct device* dev = device_getbyhname(this->data, &dnode->name);
+    struct device* dev =
+      device_getbyhname((struct device*)this->data, &dnode->name);
     if (!dev) {
         return ENOENT;
     }
@@ -84,12 +129,13 @@ devfs_dirlookup(struct v_inode* this, struct v_dnode* dnode)
 int
 devfs_readdir(struct v_file* file, struct dir_context* dctx)
 {
-    struct device* dev = device_getbyoffset(file->inode->data, dctx->index);
+    struct device* dev =
+      device_getbyoffset((struct device*)(file->inode->data), dctx->index);
     if (!dev) {
         return 0;
     }
     dctx->read_complete_callback(
-      dctx, dev->name.value, dev->name.len, devfs_get_itype(dev));
+      dctx, dev->name.value, dev->name.len, devfs_get_dtype(dev));
     return 1;
 }
 
@@ -134,6 +180,7 @@ devfs_init()
     fs->mount = devfs_mount;
     fs->unmount = devfs_unmount;
 }
+EXPORT_FILE_SYSTEM(devfs, devfs_init);
 
 struct v_inode_ops devfs_inode_ops = { .dir_lookup = devfs_dirlookup,
                                        .open = default_inode_open,
@@ -142,6 +189,8 @@ struct v_inode_ops devfs_inode_ops = { .dir_lookup = devfs_dirlookup,
 
 struct v_file_ops devfs_file_ops = { .close = default_file_close,
                                      .read = devfs_read,
+                                     .read_page = devfs_read_page,
                                      .write = devfs_write,
+                                     .write_page = devfs_write_page,
                                      .seek = default_file_seek,
                                      .readdir = devfs_readdir };
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