From: Laurent Vivier <laurent@vivier.eu>
To: qemu-devel@nongnu.org
Cc: Laurent Vivier <laurent@vivier.eu>,
Filip Bozuta <Filip.Bozuta@syrmia.com>
Subject: [PULL 07/14] linux-user: Add support for a group of btrfs ioctls used for snapshots
Date: Thu, 13 Aug 2020 08:49:16 +0200 [thread overview]
Message-ID: <20200813064923.263565-8-laurent@vivier.eu> (raw)
In-Reply-To: <20200813064923.263565-1-laurent@vivier.eu>
From: Filip Bozuta <Filip.Bozuta@syrmia.com>
This patch implements functionality for following ioctls:
BTRFS_IOC_SNAP_CREATE - Creating a subvolume snapshot
Create a snapshot of a btrfs subvolume. The snapshot is created using the
ioctl's third argument that is a pointer to a 'struct btrfs_ioctl_vol_args'
(which was mentioned in the previous patch). Before calling this ioctl,
the fields of the structure should be filled with aproppriate values for
the file descriptor and path of the subvolume for which the snapshot is to
be created.
BTRFS_IOC_SNAP_DESTROY - Removing a subvolume snapshot
Delete a snapshot of a btrfs subvolume. The snapshot is deleted using the
ioctl's third argument that is a pointer to a 'struct btrfs_ioctl_vol_args'
(which was mentioned in the previous patch). Before calling this ioctl,
the fields of the structure should be filled with aproppriate values for
the file descriptor and path of the subvolume for which the snapshot is to
be deleted.
Implementation notes:
Since the thunk type 'struct btrfs_ioctl_vol_args' is defined in the
previous patch, the implementation for these ioctls was straightforward.
Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200803094629.21898-3-Filip.Bozuta@syrmia.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
---
linux-user/ioctls.h | 8 ++++++++
linux-user/syscall_defs.h | 2 ++
2 files changed, 10 insertions(+)
diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h
index 12d14442249f..f33a99f8b642 100644
--- a/linux-user/ioctls.h
+++ b/linux-user/ioctls.h
@@ -174,10 +174,18 @@
IOCTL(FS_IOC32_GETVERSION, IOC_R, MK_PTR(TYPE_INT))
IOCTL(FS_IOC32_SETVERSION, IOC_W, MK_PTR(TYPE_INT))
+#ifdef BTRFS_IOC_SNAP_CREATE
+ IOCTL(BTRFS_IOC_SNAP_CREATE, IOC_W,
+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_vol_args)))
+#endif
#ifdef BTRFS_IOC_SUBVOL_CREATE
IOCTL(BTRFS_IOC_SUBVOL_CREATE, IOC_W,
MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_vol_args)))
#endif
+#ifdef BTRFS_IOC_SNAP_DESTROY
+ IOCTL(BTRFS_IOC_SNAP_DESTROY, IOC_W,
+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_vol_args)))
+#endif
#ifdef BTRFS_IOC_SUBVOL_GETFLAGS
IOCTL(BTRFS_IOC_SUBVOL_GETFLAGS, IOC_R, MK_PTR(TYPE_ULONGLONG))
#endif
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index 5435baea38d9..e514cb6916ed 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -973,7 +973,9 @@ struct target_rtc_pll_info {
#define TARGET_FS_IOC32_SETVERSION TARGET_IOW('v', 2, int)
/* btrfs ioctls */
+#define TARGET_BTRFS_IOC_SNAP_CREATE TARGET_IOWU(BTRFS_IOCTL_MAGIC, 1)
#define TARGET_BTRFS_IOC_SUBVOL_CREATE TARGET_IOWU(BTRFS_IOCTL_MAGIC, 14)
+#define TARGET_BTRFS_IOC_SNAP_DESTROY TARGET_IOWU(BTRFS_IOCTL_MAGIC, 15)
#define TARGET_BTRFS_IOC_SUBVOL_GETFLAGS TARGET_IOR(BTRFS_IOCTL_MAGIC, 25,\
abi_ullong)
#define TARGET_BTRFS_IOC_SUBVOL_SETFLAGS TARGET_IOW(BTRFS_IOCTL_MAGIC, 26,\
--
2.26.2
next prev parent reply other threads:[~2020-08-13 6:53 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-13 6:49 [PULL 00/14] Linux user for 5.2 patches Laurent Vivier
2020-08-13 6:49 ` [PULL 01/14] linux-user: Fix "print_fdset()" in "strace.c" to not print ", " after last value Laurent Vivier
2020-08-13 6:49 ` [PULL 02/14] linux-user: Validate mmap/mprotect prot value Laurent Vivier
2020-08-13 6:49 ` [PULL 03/14] linux-user: Adjust guest page protection for the host Laurent Vivier
2020-08-13 6:49 ` [PULL 04/14] linux-user: Modify 'target_to_host/host_to_target_itimerspec()' Laurent Vivier
2020-08-13 6:49 ` [PULL 05/14] linux-user: Add support for a group of 2038 safe syscalls Laurent Vivier
2020-08-13 6:49 ` [PULL 06/14] linux-user: Add support for a group of btrfs ioctls used for subvolumes Laurent Vivier
2020-08-13 6:49 ` Laurent Vivier [this message]
2020-08-13 6:49 ` [PULL 08/14] linux-user: Add support for btrfs ioctls used to manipulate with devices Laurent Vivier
2020-08-13 6:49 ` [PULL 09/14] linux-user: Add support for btrfs ioctls used to get/set features Laurent Vivier
2020-08-13 6:49 ` [PULL 10/14] linux-user: Add support for a group of btrfs inode ioctls Laurent Vivier
2020-08-13 6:49 ` [PULL 11/14] linux-user: Add support for two btrfs ioctls used for subvolume Laurent Vivier
2020-08-13 6:49 ` [PULL 12/14] linux-user: Add support for btrfs ioctls used to manage quota Laurent Vivier
2020-08-13 6:49 ` [PULL 13/14] linux-user: Add support for btrfs ioctls used to scrub a filesystem Laurent Vivier
2020-08-13 6:49 ` [PULL 14/14] linux-user: Fix 'utimensat()' implementation Laurent Vivier
2020-08-21 16:23 ` [PULL 00/14] Linux user for 5.2 patches Peter Maydell
2020-08-21 18:45 ` Laurent Vivier
2020-08-21 19:12 ` Filip Bozuta
2020-08-21 19:08 ` Laurent Vivier
2020-08-23 8:21 ` Laurent Vivier
2020-08-23 13:28 ` Laurent Vivier
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