[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH V12 06/15] hw/9pfs: Create support in chroot environ
From: |
M. Mohan Kumar |
Subject: |
[Qemu-devel] [PATCH V12 06/15] hw/9pfs: Create support in chroot environment |
Date: |
Mon, 5 Sep 2011 21:48:27 +0530 |
Add both chroot worker & qemu side interfaces to create regular files in
chroot environment
Signed-off-by: M. Mohan Kumar <address@hidden>
---
hw/9pfs/virtio-9p-chroot-worker.c | 36 ++++++++++++++++++++++++++++++++++++
hw/9pfs/virtio-9p-chroot.h | 1 +
hw/9pfs/virtio-9p-local.c | 5 +++--
3 files changed, 40 insertions(+), 2 deletions(-)
diff --git a/hw/9pfs/virtio-9p-chroot-worker.c
b/hw/9pfs/virtio-9p-chroot-worker.c
index 40a54b3..581bfa9 100644
--- a/hw/9pfs/virtio-9p-chroot-worker.c
+++ b/hw/9pfs/virtio-9p-chroot-worker.c
@@ -93,6 +93,36 @@ static int chroot_do_open(V9fsFileObjectRequest *request)
return fd;
}
+/*
+ * Helper routine to create a file and return the file descriptor
+ */
+static int chroot_do_create(V9fsFileObjectRequest *request)
+{
+ uid_t cur_uid;
+ gid_t cur_gid;
+ int fd = -1;
+
+ cur_uid = geteuid();
+ cur_gid = getegid();
+
+ if (setfsuid(request->data.uid) < 0) {
+ return -errno;
+ }
+ if (setfsgid(request->data.gid) < 0) {
+ fd = -errno;
+ goto unset_uid;
+ }
+
+ fd = open(request->path.path, request->data.flags, request->data.mode);
+ if (fd < 0) {
+ fd = -errno;
+ }
+ setfsgid(cur_gid);
+unset_uid:
+ setfsuid(cur_uid);
+ return fd;
+}
+
static void chroot_daemonize(int chroot_sock)
{
sigset_t sigset;
@@ -184,6 +214,12 @@ int v9fs_chroot(FsContext *fs_ctx)
valid_fd = 1;
}
break;
+ case T_CREATE:
+ retval = chroot_do_create(&request);
+ if (retval >= 0) {
+ valid_fd = 1;
+ }
+ break;
default:
retval = -1;
break;
diff --git a/hw/9pfs/virtio-9p-chroot.h b/hw/9pfs/virtio-9p-chroot.h
index 326238d..d5c3f37 100644
--- a/hw/9pfs/virtio-9p-chroot.h
+++ b/hw/9pfs/virtio-9p-chroot.h
@@ -4,6 +4,7 @@
#include "qemu_socket.h"
/* types for V9fsFileObjectRequest */
#define T_OPEN 1
+#define T_CREATE 2
#define V9FS_FD_VALID INT_MAX
diff --git a/hw/9pfs/virtio-9p-local.c b/hw/9pfs/virtio-9p-local.c
index a91adb8..4e40fa8 100644
--- a/hw/9pfs/virtio-9p-local.c
+++ b/hw/9pfs/virtio-9p-local.c
@@ -474,8 +474,7 @@ static int local_open2(FsContext *fs_ctx, V9fsPath
*dir_path, const char *name,
serrno = errno;
goto err_end;
}
- } else if ((fs_ctx->fs_sm == SM_PASSTHROUGH) ||
- (fs_ctx->fs_sm == SM_NONE)) {
+ } else if (fs_ctx->fs_sm == SM_NONE) {
fd = open(rpath(fs_ctx, path, buffer), flags, credp->fc_mode);
if (fd == -1) {
err = fd;
@@ -486,6 +485,8 @@ static int local_open2(FsContext *fs_ctx, V9fsPath
*dir_path, const char *name,
serrno = errno;
goto err_end;
}
+ } else if (fs_ctx->fs_sm == SM_PASSTHROUGH) {
+ fd = passthrough_request(fs_ctx, NULL, path, flags, credp, T_CREATE);
}
err = fd;
fs->fd = fd;
--
1.7.6
- [Qemu-devel] [PATCH V12 09/15] hw/9pfs: Rename in chroot environment, (continued)
- [Qemu-devel] [PATCH V12 09/15] hw/9pfs: Rename in chroot environment, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 15/15] hw/9pfs: Chroot environment for other functions, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 07/15] hw/9pfs: Creating special files in chroot environment, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 13/15] hw/9pfs: stat in chroot environment, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 11/15] hw/9pfs: chmod in chroot environment, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 04/15] hw/9pfs: qemu interfaces for chroot environment, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 05/15] hw/9pfs: Support for opening a file in chroot environment, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 02/15] hw/9pfs: Enable CONFIG_THREAD if CONFIG_VIRTFS is enabled, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 01/15] Implement qemu_read_full, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 06/15] hw/9pfs: Create support in chroot environment,
M. Mohan Kumar <=
- [Qemu-devel] [PATCH V12 03/15] hw/9pfs: Provide chroot worker side interfaces, M. Mohan Kumar, 2011/09/05
- Re: [Qemu-devel] [PATCH V12 00/15] virtio-9p: chroot environment for passthrough security model, Stefan Hajnoczi, 2011/09/06