sys/linux: add ext4 ioctls and overlayfs

Update #533

1 files changed, 143 insertions, 0 deletions

diff --git a/sys/linux/fs_ioctl.txt b/sys/linux/fs_ioctl.txt
new file mode 100644
index 000000000..977bfdbac
--- /dev/null
+++ b/sys/linux/fs_ioctl.txt
@@ -0,0 +1,143 @@
+# Copyright 2018 syzkaller project authors. All rights reserved.
+# Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+include <uapi/linux/fiemap.h>
+include <uapi/linux/fs.h>
+include <uapi/linux/fsmap.h>
+include <linux/falloc.h>
+
+ioctl$FIBMAP(fd fd, cmd const[FIBMAP], arg ptr[in, int32])
+ioctl$FIGETBSZ(fd fd, cmd const[FIGETBSZ], arg ptr[out, intptr])
+ioctl$FITRIM(fd fd, cmd const[FITRIM], arg ptr[in, fstrim_range])
+ioctl$FICLONE(fd fd, cmd const[FICLONE], arg fd)
+ioctl$FICLONERANGE(fd fd, cmd const[FICLONERANGE], arg ptr[in, file_clone_range])
+ioctl$FIDEDUPERANGE(fd fd, cmd const[FIDEDUPERANGE], arg ptr[in, file_dedupe_range])
+
+ioctl$FS_IOC_GETFLAGS(fd fd, cmd const[FS_IOC_GETFLAGS], arg ptr[out, intptr])
+ioctl$FS_IOC_SETFLAGS(fd fd, cmd const[FS_IOC_SETFLAGS], arg ptr[in, intptr])
+ioctl$FS_IOC_GETVERSION(fd fd, cmd const[FS_IOC_GETVERSION], arg ptr[out, intptr])
+ioctl$FS_IOC_SETVERSION(fd fd, cmd const[FS_IOC_SETVERSION], arg ptr[in, intptr])
+ioctl$FS_IOC_FIEMAP(fd fd, cmd const[FS_IOC_FIEMAP], v ptr[in, fiemap])
+ioctl$FS_IOC_RESVSP(fd fd, cmd const[FS_IOC_RESVSP], arg ptr[in, space_resv])
+ioctl$FS_IOC_FSGETXATTR(fd fd, cmd const[FS_IOC_FSGETXATTR], arg ptr[in, fsxattr])
+ioctl$FS_IOC_FSSETXATTR(fd fd, cmd const[FS_IOC_FSSETXATTR], arg ptr[in, fsxattr])
+ioctl$FS_IOC_GETFSLABEL(fd fd, cmd const[FS_IOC_GETFSLABEL], arg ptr[out, array[const[0, int8], FSLABEL_MAX]])
+ioctl$FS_IOC_SETFSLABEL(fd fd, cmd const[FS_IOC_SETFSLABEL], arg ptr[in, array[int8, FSLABEL_MAX]])
+ioctl$FS_IOC_SET_ENCRYPTION_POLICY(fd fd, cmd const[FS_IOC_SET_ENCRYPTION_POLICY], arg ptr[in, fscrypt_policy])
+ioctl$FS_IOC_GET_ENCRYPTION_POLICY(fd fd, cmd const[FS_IOC_GET_ENCRYPTION_POLICY], arg ptr[out, array[int8, 16]])
+ioctl$FS_IOC_GET_ENCRYPTION_PWSALT(fd fd, cmd const[FS_IOC_GET_ENCRYPTION_PWSALT], arg ptr[out, fscrypt_policy])
+ioctl$FS_IOC_GETFSMAP(fd fd, cmd const[FS_IOC_GETFSMAP], arg ptr[in, fsmap_head])
+
+fscrypt_policy {
+	version			const[0, int8]
+	mode			fscrypt_policy_mode
+	flags			flags[fs_policy_flags, int8]
+	master_key_descriptor	array[int8, FS_KEY_DESCRIPTOR_SIZE]
+}
+
+fscrypt_policy_mode [
+	aes128		fscrypt_policy_mode_t[FS_ENCRYPTION_MODE_AES_128_CBC, FS_ENCRYPTION_MODE_AES_128_CTS]
+	aes256		fscrypt_policy_mode_t[FS_ENCRYPTION_MODE_AES_256_XTS, FS_ENCRYPTION_MODE_AES_256_CTS]
+	speck128	fscrypt_policy_mode_t[FS_ENCRYPTION_MODE_SPECK128_256_XTS, FS_ENCRYPTION_MODE_SPECK128_256_CTS]
+]
+
+type fscrypt_policy_mode_t[CONTENTS, FILENAMES] {
+	contents_encryption_mode	const[CONTENTS, int8]
+	filenames_encryption_mode	const[FILENAMES, int8]
+}
+
+fs_policy_flags = FS_POLICY_FLAGS_PAD_4, FS_POLICY_FLAGS_PAD_8, FS_POLICY_FLAGS_PAD_16
+
+space_resv {
+	l_type		const[0, int16]
+	l_whence	flags[seek_whence, int16]
+	l_start		int64
+	l_len		int64
+	l_sysid		const[0, int32]
+	l_pid		const[0, int32]
+	l_pad		array[const[0, int32], 4]
+}
+
+fstrim_range {
+	start	int64
+	len	int64
+	minlen	int64
+}
+
+file_clone_range {
+	src_fd		fd
+	pad		const[0, int32]
+	src_offset	int64
+	src_length	int64
+	dest_offset	int64
+}
+
+file_dedupe_range {
+	src_offset	int64
+	src_length	int64
+	dest_count	len[info, int16]
+	reserved1	const[0, int16]
+	reserved2	const[0, int32]
+	info		array[file_dedupe_range_info]
+}
+
+file_dedupe_range_info {
+	dest_fd		fd
+	pad		const[0, int32]
+	dest_offset	int64
+	bytes_deduped	const[0, int64]
+	status		const[0, int32]
+	reserved	const[0, int32]
+}
+
+fsxattr {
+	fsx_xflags	int32
+	fsx_extsize	int32
+	fsx_nextents	int32
+	fsx_projid	int32
+	fsx_cowextsize	int32
+	fsx_pad		const[0, int64]
+}
+
+fiemap {
+	start	int64
+	len	int64
+	flags	flags[fiemap_flags, int32]
+	mapped	int32
+	count	len[extent, int32]
+	extent	array[fiemap_extent]
+}
+
+fiemap_extent {
+	logical	int64
+	phys	int64
+	len	int64
+	pad1	const[0, int64]
+	pad2	const[0, int64]
+	flags	flags[fiemap_extent_flags, int32]
+	pad3	const[0, int32]
+	pad4	const[0, int32]
+	pad5	const[0, int32]
+}
+
+fsmap_head {
+	fmh_iflags	const[0, int32]
+	fmh_oflags	const[0, int32]
+	fmh_count	len[fmh_recs, int32]
+	fmh_entries	const[0, int32]
+	fmh_reserved	array[const[0, int64], 6]
+	fmh_keys	array[fsmap, 2]
+	fmh_recs	array[array[const[0, int8], FSMAP_SIZE]]
+}
+
+fsmap {
+	fmr_device	int32
+	fmr_flags	int32
+	fmr_physical	int64
+	fmr_owner	int64
+	fmr_offset	int64
+	fmr_length	int64
+	fmr_reserved	array[const[0, int64], 3]
+}
+
+define FSMAP_SIZE	sizeof(struct fsmap)