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[PATCH v2] linux-user: implement more loop ioctls


From: Andreas Schwab
Subject: [PATCH v2] linux-user: implement more loop ioctls
Date: Mon, 22 Nov 2021 16:56:02 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux)

LOOP_CONFIGURE is now used by losetup, and it cannot cope with ENOSYS.

Signed-off-by: Andreas Schwab <schwab@suse.de>
---
v2: fix s/loop_configure/loop_config/ typo

 linux-user/ioctls.h        | 4 ++++
 linux-user/linux_loop.h    | 2 ++
 linux-user/syscall_defs.h  | 4 ++++
 linux-user/syscall_types.h | 6 ++++++
 4 files changed, 16 insertions(+)

diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h
index 7193c3b226..f182d40190 100644
--- a/linux-user/ioctls.h
+++ b/linux-user/ioctls.h
@@ -637,6 +637,10 @@
   IOCTL(LOOP_SET_STATUS64, IOC_W, MK_PTR(MK_STRUCT(STRUCT_loop_info64)))
   IOCTL(LOOP_GET_STATUS64, IOC_R, MK_PTR(MK_STRUCT(STRUCT_loop_info64)))
   IOCTL(LOOP_CHANGE_FD, 0, TYPE_INT)
+  IOCTL(LOOP_SET_CAPACITY, 0, TYPE_INT)
+  IOCTL(LOOP_SET_DIRECT_IO, 0, TYPE_INT)
+  IOCTL(LOOP_SET_BLOCK_SIZE, 0, TYPE_INT)
+  IOCTL(LOOP_CONFIGURE, IOC_W, MK_PTR(MK_STRUCT(STRUCT_loop_config)))
 
   IOCTL(LOOP_CTL_ADD, 0, TYPE_INT)
   IOCTL(LOOP_CTL_REMOVE, 0, TYPE_INT)
diff --git a/linux-user/linux_loop.h b/linux-user/linux_loop.h
index c69fea11e4..f80b96f1ff 100644
--- a/linux-user/linux_loop.h
+++ b/linux-user/linux_loop.h
@@ -96,6 +96,8 @@ struct loop_info64 {
 #define LOOP_CHANGE_FD         0x4C06
 #define LOOP_SET_CAPACITY       0x4C07
 #define LOOP_SET_DIRECT_IO      0x4C08
+#define LOOP_SET_BLOCK_SIZE     0x4C09
+#define LOOP_CONFIGURE          0x4C0A
 
 /* /dev/loop-control interface */
 #define LOOP_CTL_ADD            0x4C80
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index a5ce487dcc..560a29afd8 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -1219,6 +1219,10 @@ struct target_rtc_pll_info {
 #define TARGET_LOOP_SET_STATUS64      0x4C04
 #define TARGET_LOOP_GET_STATUS64      0x4C05
 #define TARGET_LOOP_CHANGE_FD         0x4C06
+#define TARGET_LOOP_SET_CAPACITY      0x4C07
+#define TARGET_LOOP_SET_DIRECT_IO     0x4C08
+#define TARGET_LOOP_SET_BLOCK_SIZE    0x4C09
+#define TARGET_LOOP_CONFIGURE         0x4C0A
 
 #define TARGET_LOOP_CTL_ADD           0x4C80
 #define TARGET_LOOP_CTL_REMOVE        0x4C81
diff --git a/linux-user/syscall_types.h b/linux-user/syscall_types.h
index ba2c1518eb..c3b43f8022 100644
--- a/linux-user/syscall_types.h
+++ b/linux-user/syscall_types.h
@@ -201,6 +201,12 @@ STRUCT(loop_info64,
        MK_ARRAY(TYPE_CHAR, 32),  /* lo_encrypt_key */
        MK_ARRAY(TYPE_ULONGLONG, 2))  /* lo_init */
 
+STRUCT(loop_config,
+       TYPE_INT,                 /* fd */
+       TYPE_INT,                 /* block_size */
+       MK_STRUCT(STRUCT_loop_info64), /* info */
+       MK_ARRAY(TYPE_ULONGLONG, 8)) /* __reserved */
+
 /* mag tape ioctls */
 STRUCT(mtop, TYPE_SHORT, TYPE_INT)
 STRUCT(mtget, TYPE_LONG, TYPE_LONG, TYPE_LONG, TYPE_LONG, TYPE_LONG,
-- 
2.34.0




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