feat: fstat now handle symbolic link

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

diff --git a/lunaix-os/kernel/device/device.c b/lunaix-os/kernel/device/device.c
index beb1f18050b15097bb02d5696b037a8a8f32e5a6..d26808a4646dbe453ff276e6f2836b6e1e203f6d 100644 (file)
--- a/lunaix-os/kernel/device/device.c
+++ b/lunaix-os/kernel/device/device.c
@@ -1,22 +1,68 @@
-#include <klibc/stdio.h>
+
 #include <lunaix/device.h>
+#include <lunaix/fs.h>
 #include <lunaix/fs/twifs.h>
+#include <lunaix/ioctl.h>
 #include <lunaix/mm/valloc.h>
 #include <lunaix/spike.h>
+#include <lunaix/syscall.h>
+#include <lunaix/syscall_utils.h>
+
+#include <usr/lunaix/device.h>
+
+#include <klibc/stdio.h>
+#include <klibc/string.h>
 
 static DEFINE_LLIST(root_list);
 
-static volatile dev_t devid = 0;
+static volatile u32_t devid = 0;
+
+struct devclass default_devclass = {};
+
+void
+device_prepare(struct device* dev, struct devclass* class)
+{
+    dev->magic = DEV_STRUCT_MAGIC;
+    dev->dev_uid = devid++;
+    dev->class = class ? class : &default_devclass;
+
+    llist_init_head(&dev->children);
+}
+
+static void
+device_setname_vargs(struct device* dev, char* fmt, va_list args)
+{
+    size_t strlen =
+      __ksprintf_internal(dev->name_val, fmt, DEVICE_NAME_SIZE, args);
+
+    dev->name = HSTR(dev->name_val, strlen);
+
+    hstr_rehash(&dev->name, HSTR_FULL_HASH);
+}
+
+void
+device_setname(struct device* dev, char* fmt, ...)
+{
+    va_list args;
+    va_start(args, fmt);
+
+    device_setname_vargs(dev, fmt, args);
+
+    va_end(args);
+}
 
 struct device*
-device_add(struct device* parent,
-           void* underlay,
-           char* name_fmt,
-           uint32_t type,
-           va_list args)
+device_add_vargs(struct device* parent,
+                 void* underlay,
+                 char* name_fmt,
+                 u32_t type,
+                 struct devclass* class,
+                 va_list args)
 {
     struct device* dev = vzalloc(sizeof(struct device));
 
+    device_prepare(dev, class);
+
     if (parent) {
         assert((parent->dev_type & DEV_MSKIF) == DEV_IFCAT);
         llist_append(&parent->children, &dev->siblings);
@@ -24,42 +70,81 @@ device_add(struct device* parent,
         llist_append(&root_list, &dev->siblings);
     }
 
-    size_t strlen =
-      __ksprintf_internal(dev->name_val, name_fmt, DEVICE_NAME_SIZE, args);
+    if (name_fmt) {
+        device_setname_vargs(dev, name_fmt, args);
+    }
 
-    dev->dev_id = devid++;
-    dev->name = HSTR(dev->name_val, strlen);
     dev->parent = parent;
     dev->underlay = underlay;
     dev->dev_type = type;
 
-    hstr_rehash(&dev->name, HSTR_FULL_HASH);
-    llist_init_head(&dev->children);
+    return dev;
+}
 
+struct device*
+device_add(struct device* parent,
+           struct devclass* class,
+           void* underlay,
+           u32_t type,
+           char* name_fmt,
+           ...)
+{
+    va_list args;
+    va_start(args, name_fmt);
+
+    struct device* dev =
+      device_add_vargs(parent, underlay, name_fmt, type, class, args);
+
+    va_end(args);
+    return dev;
+}
+
+struct device*
+device_addsys(struct device* parent,
+              struct devclass* class,
+              void* underlay,
+              char* name_fmt,
+              ...)
+{
+    va_list args;
+    va_start(args, name_fmt);
+
+    struct device* dev =
+      device_add_vargs(parent, underlay, name_fmt, DEV_IFSYS, class, args);
+
+    va_end(args);
     return dev;
 }
 
 struct device*
-device_addseq(struct device* parent, void* underlay, char* name_fmt, ...)
+device_addseq(struct device* parent,
+              struct devclass* class,
+              void* underlay,
+              char* name_fmt,
+              ...)
 {
     va_list args;
     va_start(args, name_fmt);
 
     struct device* dev =
-      device_add(parent, underlay, name_fmt, DEV_IFSEQ, args);
+      device_add_vargs(parent, underlay, name_fmt, DEV_IFSEQ, class, args);
 
     va_end(args);
     return dev;
 }
 
 struct device*
-device_addvol(struct device* parent, void* underlay, char* name_fmt, ...)
+device_addvol(struct device* parent,
+              struct devclass* class,
+              void* underlay,
+              char* name_fmt,
+              ...)
 {
     va_list args;
     va_start(args, name_fmt);
 
     struct device* dev =
-      device_add(parent, underlay, name_fmt, DEV_IFVOL, args);
+      device_add_vargs(parent, underlay, name_fmt, DEV_IFVOL, class, args);
 
     va_end(args);
     return dev;
@@ -71,20 +156,21 @@ device_addcat(struct device* parent, char* name_fmt, ...)
     va_list args;
     va_start(args, name_fmt);
 
-    struct device* dev = device_add(parent, NULL, name_fmt, DEV_IFCAT, args);
+    struct device* dev =
+      device_add_vargs(parent, NULL, name_fmt, DEV_IFCAT, NULL, args);
 
     va_end(args);
     return dev;
 }
 
 struct device*
-device_getbyid(struct llist_header* devlist, dev_t id)
+device_getbyid(struct llist_header* devlist, u32_t id)
 {
     devlist = devlist ? devlist : &root_list;
     struct device *pos, *n;
     llist_for_each(pos, n, devlist, siblings)
     {
-        if (pos->dev_id == id) {
+        if (pos->dev_uid == id) {
             return pos;
         }
     }
@@ -136,4 +222,53 @@ device_getbyoffset(struct device* root_dev, int offset)
         }
     }
     return NULL;
+}
+
+static inline void
+device_populate_info(struct device* dev, struct dev_info* devinfo)
+{
+    devinfo->dev_id.meta = dev->class->meta;
+    devinfo->dev_id.device = dev->class->device;
+    devinfo->dev_id.variant = dev->class->variant;
+
+    if (!devinfo->dev_name.buf) {
+        return;
+    }
+
+    struct device_def* def = devdef_byclass(dev->class);
+    size_t buflen = devinfo->dev_name.buf_len;
+
+    strncpy(devinfo->dev_name.buf, def->name, buflen);
+    devinfo->dev_name.buf[buflen - 1] = 0;
+}
+
+__DEFINE_LXSYSCALL3(int, ioctl, int, fd, int, req, va_list, args)
+{
+    int errno = -1;
+    struct v_fd* fd_s;
+    if ((errno &= vfs_getfd(fd, &fd_s))) {
+        goto done;
+    }
+
+    struct device* dev = (struct device*)fd_s->file->inode->data;
+    if (dev->magic != DEV_STRUCT_MAGIC) {
+        errno &= ENODEV;
+        goto done;
+    }
+
+    if (req == DEVIOIDENT) {
+        struct dev_info* devinfo = va_arg(args, struct dev_info*);
+        device_populate_info(dev, devinfo);
+        errno = 0;
+    }
+
+    if (!dev->ops.exec_cmd) {
+        errno &= ENOTSUP;
+        goto done;
+    }
+
+    errno &= dev->ops.exec_cmd(dev, req, args);
+
+done:
+    return DO_STATUS_OR_RETURN(errno);
 }
\ No newline at end of file