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a799f071ba
qemu/0046-linux-user-implement-device-mapper-ioctls.patch
Alexander Graf a799f071ba - qemu-user: add fix for deadloop with ulimit constraints 
- qemu-user: add device mapper and loopback ioctls, enabling kpatkx

OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=40
2012-01-31 23:10:40 +00:00

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From df8bec1f09754015f3b43591e1b8e9de70910c9a Mon Sep 17 00:00:00 2001
From: Alexander Graf <agraf@suse.de>
Date: Tue, 31 Jan 2012 18:42:06 +0100
Subject: [PATCH] linux-user: implement device mapper ioctls
This patch implements all ioctls currently implemented by device mapper,
enabling us to run dmsetup and kpartx inside of linux-user.
Signed-off-by: Alexander Graf <agraf@suse.de>
---
linux-user/ioctls.h | 33 +++++++
linux-user/syscall.c | 226 ++++++++++++++++++++++++++++++++++++++++++++
linux-user/syscall_defs.h | 18 ++++
linux-user/syscall_types.h | 36 +++++++
4 files changed, 313 insertions(+), 0 deletions(-)
diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h
index 224dbc6..05b7290 100644
--- a/linux-user/ioctls.h
+++ b/linux-user/ioctls.h
@@ -350,3 +350,36 @@
IOCTL(VT_SETMODE, IOC_RW, MK_PTR(MK_STRUCT(STRUCT_vt_mode)))
IOCTL(VT_RELDISP, 0, TYPE_INT)
IOCTL(VT_DISALLOCATE, 0, TYPE_INT)
+
+ IOCTL(DM_VERSION, IOC_RW, MK_PTR(MK_STRUCT(STRUCT_dm_ioctl)))
+ IOCTL_SPECIAL(DM_REMOVE_ALL, IOC_RW, do_ioctl_dm,
+ MK_PTR(MK_STRUCT(STRUCT_dm_ioctl)))
+ IOCTL_SPECIAL(DM_LIST_DEVICES, IOC_RW, do_ioctl_dm,
+ MK_PTR(MK_STRUCT(STRUCT_dm_ioctl)))
+ IOCTL_SPECIAL(DM_DEV_CREATE, IOC_RW, do_ioctl_dm,
+ MK_PTR(MK_STRUCT(STRUCT_dm_ioctl)))
+ IOCTL_SPECIAL(DM_DEV_REMOVE, IOC_RW, do_ioctl_dm,
+ MK_PTR(MK_STRUCT(STRUCT_dm_ioctl)))
+ IOCTL_SPECIAL(DM_DEV_RENAME, IOC_RW, do_ioctl_dm,
+ MK_PTR(MK_STRUCT(STRUCT_dm_ioctl)))
+ IOCTL_SPECIAL(DM_DEV_SUSPEND, IOC_RW, do_ioctl_dm,
+ MK_PTR(MK_STRUCT(STRUCT_dm_ioctl)))
+ IOCTL_SPECIAL(DM_DEV_STATUS, IOC_RW, do_ioctl_dm,
+ MK_PTR(MK_STRUCT(STRUCT_dm_ioctl)))
+ IOCTL_SPECIAL(DM_DEV_WAIT, IOC_RW, do_ioctl_dm,
+ MK_PTR(MK_STRUCT(STRUCT_dm_ioctl)))
+ IOCTL_SPECIAL(DM_TABLE_LOAD, IOC_RW, do_ioctl_dm,
+ MK_PTR(MK_STRUCT(STRUCT_dm_ioctl)))
+ IOCTL_SPECIAL(DM_TABLE_CLEAR, IOC_RW, do_ioctl_dm,
+ MK_PTR(MK_STRUCT(STRUCT_dm_ioctl)))
+ IOCTL_SPECIAL(DM_TABLE_DEPS, IOC_RW, do_ioctl_dm,
+ MK_PTR(MK_STRUCT(STRUCT_dm_ioctl)))
+ IOCTL_SPECIAL(DM_TABLE_STATUS, IOC_RW, do_ioctl_dm,
+ MK_PTR(MK_STRUCT(STRUCT_dm_ioctl)))
+ IOCTL_SPECIAL(DM_LIST_VERSIONS,IOC_RW, do_ioctl_dm,
+ MK_PTR(MK_STRUCT(STRUCT_dm_ioctl)))
+ IOCTL_SPECIAL(DM_TARGET_MSG, IOC_RW, do_ioctl_dm,
+ MK_PTR(MK_STRUCT(STRUCT_dm_ioctl)))
+ IOCTL_SPECIAL(DM_DEV_SET_GEOMETRY, IOC_RW, do_ioctl_dm,
+ MK_PTR(MK_STRUCT(STRUCT_dm_ioctl)))
+
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 3e8e3dd..7a20af4 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -95,6 +95,7 @@ int __clone2(int (*fn)(void *), void *child_stack_base,
#endif
#include <linux/fb.h>
#include <linux/vt.h>
+#include <linux/dm-ioctl.h>
#include "linux_loop.h"
#include "cpu-uname.h"
@@ -3320,6 +3321,231 @@ static abi_long do_ioctl_ifconf(const IOCTLEntry *ie, uint8_t *buf_temp,
return ret;
}
+static abi_long do_ioctl_dm(const IOCTLEntry *ie, uint8_t *buf_temp, int fd,
+ abi_long cmd, abi_long arg)
+{
+ void *argptr;
+ struct dm_ioctl *host_dm;
+ abi_long guest_data;
+ uint32_t guest_data_size;
+ int target_size;
+ const argtype *arg_type = ie->arg_type;
+ abi_long ret;
+ void *big_buf = NULL;
+ char *host_data;
+
+ arg_type++;
+ target_size = thunk_type_size(arg_type, 0);
+ argptr = lock_user(VERIFY_READ, arg, target_size, 1);
+ if (!argptr) {
+ ret = -TARGET_EFAULT;
+ goto out;
+ }
+ thunk_convert(buf_temp, argptr, arg_type, THUNK_HOST);
+ unlock_user(argptr, arg, 0);
+
+ /* buf_temp is too small, so fetch things into a bigger buffer */
+ big_buf = g_malloc0(((struct dm_ioctl*)buf_temp)->data_size * 2);
+ memcpy(big_buf, buf_temp, target_size);
+ buf_temp = big_buf;
+ host_dm = big_buf;
+
+ guest_data = arg + host_dm->data_start;
+ if ((guest_data - arg) < 0) {
+ ret = -EINVAL;
+ goto out;
+ }
+ guest_data_size = host_dm->data_size - host_dm->data_start;
+ host_data = (char*)host_dm + host_dm->data_start;
+
+ argptr = lock_user(VERIFY_READ, guest_data, guest_data_size, 1);
+ switch (ie->host_cmd) {
+ case DM_REMOVE_ALL:
+ case DM_LIST_DEVICES:
+ case DM_DEV_CREATE:
+ case DM_DEV_REMOVE:
+ case DM_DEV_SUSPEND:
+ case DM_DEV_STATUS:
+ case DM_DEV_WAIT:
+ case DM_TABLE_STATUS:
+ case DM_TABLE_CLEAR:
+ case DM_TABLE_DEPS:
+ case DM_LIST_VERSIONS:
+ /* no input data */
+ break;
+ case DM_DEV_RENAME:
+ case DM_DEV_SET_GEOMETRY:
+ /* data contains only strings */
+ memcpy(host_data, argptr, guest_data_size);
+ break;
+ case DM_TARGET_MSG:
+ memcpy(host_data, argptr, guest_data_size);
+ *(uint64_t*)host_data = tswap64(*(uint64_t*)argptr);
+ break;
+ case DM_TABLE_LOAD:
+ {
+ void *gspec = argptr;
+ void *cur_data = host_data;
+ const argtype arg_type[] = { MK_STRUCT(STRUCT_dm_target_spec) };
+ int spec_size = thunk_type_size(arg_type, 0);
+ int i;
+
+ for (i = 0; i < host_dm->target_count; i++) {
+ struct dm_target_spec *spec = cur_data;
+ uint32_t next;
+ int slen;
+
+ thunk_convert(spec, gspec, arg_type, THUNK_HOST);
+ slen = strlen((char*)gspec + spec_size) + 1;
+ next = spec->next;
+ spec->next = sizeof(*spec) + slen;
+ strcpy((char*)&spec[1], gspec + spec_size);
+ gspec += next;
+ cur_data += spec->next;
+ }
+ break;
+ }
+ default:
+ ret = -TARGET_EINVAL;
+ goto out;
+ }
+ unlock_user(argptr, guest_data, 0);
+
+ ret = get_errno(ioctl(fd, ie->host_cmd, buf_temp));
+ if (!is_error(ret)) {
+ guest_data = arg + host_dm->data_start;
+ guest_data_size = host_dm->data_size - host_dm->data_start;
+ argptr = lock_user(VERIFY_WRITE, guest_data, guest_data_size, 0);
+ switch (ie->host_cmd) {
+ case DM_REMOVE_ALL:
+ case DM_DEV_CREATE:
+ case DM_DEV_REMOVE:
+ case DM_DEV_RENAME:
+ case DM_DEV_SUSPEND:
+ case DM_DEV_STATUS:
+ case DM_TABLE_LOAD:
+ case DM_TABLE_CLEAR:
+ case DM_TARGET_MSG:
+ case DM_DEV_SET_GEOMETRY:
+ /* no return data */
+ break;
+ case DM_LIST_DEVICES:
+ {
+ struct dm_name_list *nl = (void*)host_dm + host_dm->data_start;
+ uint32_t remaining_data = guest_data_size;
+ void *cur_data = argptr;
+ const argtype arg_type[] = { MK_STRUCT(STRUCT_dm_name_list) };
+ int nl_size = 12; /* can't use thunk_size due to alignment */
+
+ while (1) {
+ uint32_t next = nl->next;
+ if (next) {
+ nl->next = nl_size + (strlen(nl->name) + 1);
+ }
+ if (remaining_data < nl->next) {
+ host_dm->flags |= DM_BUFFER_FULL_FLAG;
+ break;
+ }
+ thunk_convert(cur_data, nl, arg_type, THUNK_TARGET);
+ strcpy(cur_data + nl_size, nl->name);
+ cur_data += nl->next;
+ remaining_data -= nl->next;
+ if (!next) {
+ break;
+ }
+ nl = (void*)nl + next;
+ }
+ break;
+ }
+ case DM_DEV_WAIT:
+ case DM_TABLE_STATUS:
+ {
+ struct dm_target_spec *spec = (void*)host_dm + host_dm->data_start;
+ void *cur_data = argptr;
+ const argtype arg_type[] = { MK_STRUCT(STRUCT_dm_target_spec) };
+ int spec_size = thunk_type_size(arg_type, 0);
+ int i;
+
+ for (i = 0; i < host_dm->target_count; i++) {
+ uint32_t next = spec->next;
+ int slen = strlen((char*)&spec[1]) + 1;
+ spec->next = (cur_data - argptr) + spec_size + slen;
+ if (guest_data_size < spec->next) {
+ host_dm->flags |= DM_BUFFER_FULL_FLAG;
+ break;
+ }
+ thunk_convert(cur_data, spec, arg_type, THUNK_TARGET);
+ strcpy(cur_data + spec_size, (char*)&spec[1]);
+ cur_data = argptr + spec->next;
+ spec = (void*)host_dm + host_dm->data_start + next;
+ }
+ break;
+ }
+ case DM_TABLE_DEPS:
+ {
+ void *hdata = (void*)host_dm + host_dm->data_start;
+ int count = *(uint32_t*)hdata;
+ uint64_t *hdev = hdata + 8;
+ uint64_t *gdev = argptr + 8;
+ int i;
+
+ *(uint32_t*)argptr = tswap32(count);
+ for (i = 0; i < count; i++) {
+ *gdev = tswap64(*hdev);
+ gdev++;
+ hdev++;
+ }
+ break;
+ }
+ case DM_LIST_VERSIONS:
+ {
+ struct dm_target_versions *vers = (void*)host_dm + host_dm->data_start;
+ uint32_t remaining_data = guest_data_size;
+ void *cur_data = argptr;
+ const argtype arg_type[] = { MK_STRUCT(STRUCT_dm_target_versions) };
+ int vers_size = thunk_type_size(arg_type, 0);
+
+ while (1) {
+ uint32_t next = vers->next;
+ if (next) {
+ vers->next = vers_size + (strlen(vers->name) + 1);
+ }
+ if (remaining_data < vers->next) {
+ host_dm->flags |= DM_BUFFER_FULL_FLAG;
+ break;
+ }
+ thunk_convert(cur_data, vers, arg_type, THUNK_TARGET);
+ strcpy(cur_data + vers_size, vers->name);
+ cur_data += vers->next;
+ remaining_data -= vers->next;
+ if (!next) {
+ break;
+ }
+ vers = (void*)vers + next;
+ }
+ break;
+ }
+ default:
+ ret = -TARGET_EINVAL;
+ goto out;
+ }
+ unlock_user(argptr, guest_data, guest_data_size);
+
+ argptr = lock_user(VERIFY_WRITE, arg, target_size, 0);
+ if (!argptr) {
+ ret = -TARGET_EFAULT;
+ goto out;
+ }
+ thunk_convert(argptr, buf_temp, arg_type, THUNK_TARGET);
+ unlock_user(argptr, arg, target_size);
+ }
+out:
+ if (big_buf) {
+ free(big_buf);
+ }
+ return ret;
+}
+
static IOCTLEntry ioctl_entries[] = {
#define IOCTL(cmd, access, ...) \
{ TARGET_ ## cmd, cmd, #cmd, access, 0, { __VA_ARGS__ } },
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index f0acc72..c8b57c9 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -989,6 +989,24 @@ struct target_pollfd {
#define TARGET_VT_RELDISP 0x5605
#define TARGET_VT_DISALLOCATE 0x5608
+/* device mapper */
+#define TARGET_DM_VERSION TARGET_IOWRU(0xfd, 0x00)
+#define TARGET_DM_REMOVE_ALL TARGET_IOWRU(0xfd, 0x01)
+#define TARGET_DM_LIST_DEVICES TARGET_IOWRU(0xfd, 0x02)
+#define TARGET_DM_DEV_CREATE TARGET_IOWRU(0xfd, 0x03)
+#define TARGET_DM_DEV_REMOVE TARGET_IOWRU(0xfd, 0x04)
+#define TARGET_DM_DEV_RENAME TARGET_IOWRU(0xfd, 0x05)
+#define TARGET_DM_DEV_SUSPEND TARGET_IOWRU(0xfd, 0x06)
+#define TARGET_DM_DEV_STATUS TARGET_IOWRU(0xfd, 0x07)
+#define TARGET_DM_DEV_WAIT TARGET_IOWRU(0xfd, 0x08)
+#define TARGET_DM_TABLE_LOAD TARGET_IOWRU(0xfd, 0x09)
+#define TARGET_DM_TABLE_CLEAR TARGET_IOWRU(0xfd, 0x0a)
+#define TARGET_DM_TABLE_DEPS TARGET_IOWRU(0xfd, 0x0b)
+#define TARGET_DM_TABLE_STATUS TARGET_IOWRU(0xfd, 0x0c)
+#define TARGET_DM_LIST_VERSIONS TARGET_IOWRU(0xfd, 0x0d)
+#define TARGET_DM_TARGET_MSG TARGET_IOWRU(0xfd, 0x0e)
+#define TARGET_DM_DEV_SET_GEOMETRY TARGET_IOWRU(0xfd, 0x0f)
+
/* from asm/termbits.h */
#define TARGET_NCC 8
diff --git a/linux-user/syscall_types.h b/linux-user/syscall_types.h
index 8fde25c..dea520e 100644
--- a/linux-user/syscall_types.h
+++ b/linux-user/syscall_types.h
@@ -191,6 +191,42 @@ STRUCT(vt_mode,
TYPE_SHORT, /* acqsig */
TYPE_SHORT) /* frsig */
+STRUCT(dm_ioctl,
+ MK_ARRAY(TYPE_INT, 3), /* version */
+ TYPE_INT, /* data_size */
+ TYPE_INT, /* data_start */
+ TYPE_INT, /* target_count*/
+ TYPE_INT, /* open_count */
+ TYPE_INT, /* flags */
+ TYPE_INT, /* event_nr */
+ TYPE_INT, /* padding */
+ TYPE_ULONGLONG, /* dev */
+ MK_ARRAY(TYPE_CHAR, 128), /* name */
+ MK_ARRAY(TYPE_CHAR, 129), /* uuid */
+ MK_ARRAY(TYPE_CHAR, 7)) /* data */
+
+STRUCT(dm_target_spec,
+ TYPE_ULONGLONG, /* sector_start */
+ TYPE_ULONGLONG, /* length */
+ TYPE_INT, /* status */
+ TYPE_INT, /* next */
+ MK_ARRAY(TYPE_CHAR, 16)) /* target_type */
+
+STRUCT(dm_target_deps,
+ TYPE_INT, /* count */
+ TYPE_INT) /* padding */
+
+STRUCT(dm_name_list,
+ TYPE_ULONGLONG, /* dev */
+ TYPE_INT) /* next */
+
+STRUCT(dm_target_versions,
+ TYPE_INT, /* next */
+ MK_ARRAY(TYPE_INT, 3)) /* version*/
+
+STRUCT(dm_target_msg,
+ TYPE_ULONGLONG) /* sector */
+
STRUCT(fiemap_extent,
TYPE_ULONGLONG, /* fe_logical */
TYPE_ULONGLONG, /* fe_physical */
--
1.6.0.2
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