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[Qemu-devel] [V11 11/15] virtio-9p: chmod in chroot environment
From: |
M. Mohan Kumar |
Subject: |
[Qemu-devel] [V11 11/15] virtio-9p: chmod in chroot environment |
Date: |
Fri, 24 Jun 2011 13:52:20 +0530 |
From: "M. Mohan Kumar" <address@hidden>
Add support to do chmod operation in chroot process.
Signed-off-by: M. Mohan Kumar <address@hidden>
---
hw/9pfs/virtio-9p-chroot-worker.c | 18 ++++++++++++++++++
hw/9pfs/virtio-9p-chroot.h | 1 +
hw/9pfs/virtio-9p-local.c | 5 +++--
3 files changed, 22 insertions(+), 2 deletions(-)
diff --git a/hw/9pfs/virtio-9p-chroot-worker.c
b/hw/9pfs/virtio-9p-chroot-worker.c
index 9bb94f2..d297b50 100644
--- a/hw/9pfs/virtio-9p-chroot-worker.c
+++ b/hw/9pfs/virtio-9p-chroot-worker.c
@@ -198,6 +198,21 @@ static int chroot_do_rename(V9fsFileObjectRequest *request)
return 0;
}
+/*
+ * Change permissions of a file object
+ * Returns 0 on success and -errno on failure
+ */
+static int chroot_do_chmod(V9fsFileObjectRequest *request)
+{
+ int retval;
+
+ retval = chmod(request->path.path, request->data.mode);
+ if (retval < 0) {
+ return -errno;
+ }
+ return 0;
+}
+
static void chroot_daemonize(int chroot_sock)
{
sigset_t sigset;
@@ -307,6 +322,9 @@ int v9fs_chroot(FsContext *fs_ctx)
case T_RENAME:
retval = chroot_do_rename(&request);
break;
+ case T_CHMOD:
+ retval = chroot_do_chmod(&request);
+ break;
default:
retval = -1;
break;
diff --git a/hw/9pfs/virtio-9p-chroot.h b/hw/9pfs/virtio-9p-chroot.h
index fda60af..fc7a134 100644
--- a/hw/9pfs/virtio-9p-chroot.h
+++ b/hw/9pfs/virtio-9p-chroot.h
@@ -11,6 +11,7 @@
#define T_LINK 6
#define T_REMOVE 7
#define T_RENAME 8
+#define T_CHMOD 9
#define V9FS_FD_VALID INT_MAX
diff --git a/hw/9pfs/virtio-9p-local.c b/hw/9pfs/virtio-9p-local.c
index 2645da0..2b22f5d 100644
--- a/hw/9pfs/virtio-9p-local.c
+++ b/hw/9pfs/virtio-9p-local.c
@@ -288,9 +288,10 @@ static int local_chmod(FsContext *fs_ctx, V9fsPath
*fs_path, FsCred *credp)
if (fs_ctx->fs_sm == SM_MAPPED) {
return local_set_xattr(rpath(fs_ctx, path, buffer), credp);
- } else if ((fs_ctx->fs_sm == SM_PASSTHROUGH) ||
- (fs_ctx->fs_sm == SM_NONE)) {
+ } else if (fs_ctx->fs_sm == SM_NONE) {
return chmod(rpath(fs_ctx, path, buffer), credp->fc_mode);
+ } else {
+ return passthrough_request(fs_ctx, NULL, path, 0, credp, T_CHMOD);
}
return -1;
}
--
1.7.5.4
- [Qemu-devel] [V11 00/15] virtio-9p: Use chroot to safely access files in passthrough security model, M. Mohan Kumar, 2011/06/24
- [Qemu-devel] [V11 12/15] virtio-9p: chown in chroot environment, M. Mohan Kumar, 2011/06/24
- [Qemu-devel] [V11 11/15] virtio-9p: chmod in chroot environment,
M. Mohan Kumar <=
- [Qemu-devel] [V11 08/15] virtio-9p: Removing file or directory in chroot environment, M. Mohan Kumar, 2011/06/24
- [Qemu-devel] [V11 07/15] virtio-9p: Creating special files in chroot environment, M. Mohan Kumar, 2011/06/24
- [Qemu-devel] [V11 13/15] virtio-9p: stat in chroot environment, M. Mohan Kumar, 2011/06/24
- [Qemu-devel] [V11 03/15] virtio-9p: Provide chroot worker side interfaces, M. Mohan Kumar, 2011/06/24
- [Qemu-devel] [V11 02/15] virtio-9p: Enable CONFIG_THREAD if CONFIG_VIRTFS is enabled, M. Mohan Kumar, 2011/06/24
- [Qemu-devel] [V11 15/15] virtio-9p: Chroot environment for other functions, M. Mohan Kumar, 2011/06/24
- [Qemu-devel] [V11 10/15] virtio-9p: Move file post creation changes to none security model, M. Mohan Kumar, 2011/06/24
- [Qemu-devel] [V11 06/15] virtio-9p: Create support in chroot environment, M. Mohan Kumar, 2011/06/24
- [Qemu-devel] [V11 14/15] virtio-9p: readlink in chroot environment, M. Mohan Kumar, 2011/06/24
- [Qemu-devel] [V11 05/15] virtio-9p: Support for opening a file in chroot environment, M. Mohan Kumar, 2011/06/24