linux-user: Implement FS_IOC_GETFLAGS and FS_IOC_SETFLAGS ioctls

Commit Message

Peter Maydell July 15, 2016, 5:44 p.m. UTC

Implement the FS_IOC_GETFLAGS and FS_IOC_SETFLAGS ioctls, as used
by chattr.

Note that the type information encoded in these ioctl numbers
is at odds with the actual type the kernel accesses, as discussed
in http://thread.gmane.org/gmane.linux.file-systems/80164.

Signed-off-by: Peter Maydell <[e-mail]>
---
We need these ioctls for chattr, which in turn is needed
for the LTP utimensat test cases to be run.
---
 linux-user/ioctls.h       | 3 +++
 linux-user/syscall_defs.h | 6 ++++++
 2 files changed, 9 insertions(+)

Patch

diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h
index 7e2c133..1bad701 100644
--- a/linux-user/ioctls.h
+++ b/linux-user/ioctls.h
@@ -120,6 +120,9 @@ 
                    MK_PTR(MK_STRUCT(STRUCT_fiemap)))
 #endif
 
+     IOCTL(FS_IOC_GETFLAGS, IOC_R, MK_PTR(TYPE_INT))
+     IOCTL(FS_IOC_SETFLAGS, IOC_W, MK_PTR(TYPE_INT))
+
   IOCTL(SIOCATMARK, IOC_R, MK_PTR(TYPE_INT))
   IOCTL(SIOCGIFNAME, IOC_RW, MK_PTR(TYPE_INT))
   IOCTL(SIOCGIFFLAGS, IOC_W | IOC_R, MK_PTR(MK_STRUCT(STRUCT_short_ifreq)))
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index 7835654..d9dea0e 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -998,6 +998,12 @@  struct target_pollfd {
 
 #define TARGET_FIBMAP     TARGET_IO(0x00,1)  /* bmap access */
 #define TARGET_FIGETBSZ   TARGET_IO(0x00,2)  /* get the block size used for bmap */
+/* Note that the ioctl numbers claim type "long" but the actual type
+ * used by the kernel is "int".
+ */
+#define TARGET_FS_IOC_GETFLAGS TARGET_IOR('f', 1, long)
+#define TARGET_FS_IOC_SETFLAGS TARGET_IOW('f', 2, long)
+
 #define TARGET_FS_IOC_FIEMAP TARGET_IOWR('f',11,struct fiemap)
 
 /* cdrom commands */