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Add loop device ioctls

PATCH New Gary Thomas 1 participant 1 message Mar 17, 2008

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Gary Thomas

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PATCH 1/1 Add loop device ioctls

These changes add the ioctl() calls used by loop devices.

Note: using Thunderbird, it seems much easier to attach files than include them inline. Most email readers will still show them (AFAIK)

Signature · 4 lines
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------
syscall_types.h +30 -0
Index: linux-user/syscall_types.h
===================================================================
@@ -79,3 +79,33 @@
 
 STRUCT(mixer_info,
        MK_ARRAY(TYPE_CHAR, 16), MK_ARRAY(TYPE_CHAR, 32), TYPE_INT, MK_ARRAY(TYPE_INT, 10))
+/* loop device ioctls */
+STRUCT(loop_info,
+       TYPE_INT,                 /* lo_number */
+       TYPE_SHORT,               /* lo_device */
+       TYPE_ULONG,               /* lo_inode */
+       TYPE_SHORT,               /* lo_rdevice */
+       TYPE_INT,                 /* lo_offset */
+       TYPE_INT,                 /* lo_encrypt_type */
+       TYPE_INT,                 /* lo_encrypt_key_size */
+       TYPE_INT,                 /* lo_flags */
+       MK_ARRAY(TYPE_CHAR, 64),  /* lo_name */
+       MK_ARRAY(TYPE_CHAR, 32),  /* lo_encrypt_key */
+       MK_ARRAY(TYPE_ULONG, 2),  /* lo_init */
+       MK_ARRAY(TYPE_CHAR, 4)    /* reserved */
+    )
+
+STRUCT(loop_info64,
+       TYPE_ULONGLONG,           /* lo_device */
+       TYPE_ULONGLONG,           /* lo_inode */
+       TYPE_ULONGLONG,           /* lo_rdevice */
+       TYPE_ULONGLONG,           /* lo_offset */
+       TYPE_ULONG,               /* lo_number */
+       TYPE_ULONG,               /* lo_encrypt_type */
+       TYPE_ULONG,               /* lo_encrypt_key_size */
+       TYPE_ULONG,               /* lo_flags */
+       MK_ARRAY(TYPE_CHAR, 64),  /* lo_name */
+       MK_ARRAY(TYPE_CHAR, 64),  /* lo_crypt_name */
+       MK_ARRAY(TYPE_CHAR, 32),  /* lo_encrypt_key */
+       MK_ARRAY(TYPE_ULONGLONG, 2)  /* lo_init */
+    )
syscall.c +1 -0
Index: linux-user/syscall.c
===================================================================
@@ -68,6 +68,7 @@
 #include <linux/soundcard.h>
 #include <linux/dirent.h>
 #include <linux/kd.h>
+#include <linux/loop.h>
 
 #include "qemu.h"
ioctls.h +10 -0
Index: linux-user/ioctls.h
===================================================================
@@ -300,3 +300,13 @@
 
   IOCTL(VFAT_IOCTL_READDIR_BOTH, IOC_R, MK_PTR(MK_ARRAY(MK_STRUCT(STRUCT_dirent), 2)))
   IOCTL(VFAT_IOCTL_READDIR_SHORT, IOC_R, MK_PTR(MK_ARRAY(MK_STRUCT(STRUCT_dirent), 2)))
+
+  IOCTL(LOOP_SET_FD, 0, TYPE_INT)
+  IOCTL(LOOP_CLR_FD, 0, TYPE_INT)
+  IOCTL(LOOP_SET_STATUS, IOC_W, MK_PTR(MK_STRUCT(STRUCT_loop_info)))
+  IOCTL(LOOP_GET_STATUS, IOC_W, MK_PTR(MK_STRUCT(STRUCT_loop_info)))
+#if 0 // These have some problems - not fully tested
+  IOCTL(LOOP_SET_STATUS64, IOC_W, MK_PTR(MK_STRUCT(STRUCT_loop_info64)))
+  IOCTL(LOOP_GET_STATUS64, IOC_W, MK_PTR(MK_STRUCT(STRUCT_loop_info64)))
+#endif
+  IOCTL(LOOP_CHANGE_FD, 0, TYPE_INT)
syscall_defs.h +9 -0
Index: linux-user/syscall_defs.h
===================================================================
@@ -830,7 +830,16 @@
 #define TARGET_HDIO_SET_DMA           0x0326  /* change use-dma flag */
 #define TARGET_HDIO_SET_PIO_MODE      0x0327  /* reconfig interface to new speed */
 
+/* loop ioctls */
+#define TARGET_LOOP_SET_FD             0x4C00
+#define TARGET_LOOP_CLR_FD             0x4C01
+#define TARGET_LOOP_SET_STATUS         0x4C02
+#define TARGET_LOOP_GET_STATUS         0x4C03
+#define TARGET_LOOP_SET_STATUS64       0x4C04
+#define TARGET_LOOP_GET_STATUS64       0x4C05
+#define TARGET_LOOP_CHANGE_FD          0x4C06
 
+
 /* from asm/termbits.h */
 
 #define TARGET_NCC 8