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[Qemu-devel] [PATCH V12 15/15] hw/9pfs: Chroot environment for other fun
From: |
M. Mohan Kumar |
Subject: |
[Qemu-devel] [PATCH V12 15/15] hw/9pfs: Chroot environment for other functions |
Date: |
Mon, 5 Sep 2011 21:48:36 +0530 |
Add chroot functionality for system calls that can operate on a file using
relative directory file descriptor.
Signed-off-by: M. Mohan Kumar <address@hidden>
---
hw/9pfs/virtio-9p-local.c | 41 +++++++++++++++++++++++++++++++++++++++--
1 files changed, 39 insertions(+), 2 deletions(-)
diff --git a/hw/9pfs/virtio-9p-local.c b/hw/9pfs/virtio-9p-local.c
index ffef8a2..c7cceb5 100644
--- a/hw/9pfs/virtio-9p-local.c
+++ b/hw/9pfs/virtio-9p-local.c
@@ -628,7 +628,25 @@ static int local_truncate(FsContext *ctx, V9fsPath
*fs_path, off_t size)
char buffer[PATH_MAX];
char *path = fs_path->data;
- return truncate(rpath(ctx, path, buffer), size);
+ if (ctx->fs_sm == SM_PASSTHROUGH) {
+ int fd, retval, serrno;
+ fd = passthrough_request(ctx, NULL, path, O_RDWR, NULL, T_OPEN);
+ if (fd < 0) {
+ errno = -fd;
+ return -1;
+ }
+ retval = ftruncate(fd, size);
+ if (retval < 0) {
+ serrno = errno;
+ }
+ close(fd);
+ if (retval < 0) {
+ errno = serrno;
+ }
+ return retval;
+ } else {
+ return truncate(rpath(ctx, path, buffer), size);
+ }
}
static int local_rename(FsContext *ctx, const char *oldpath,
@@ -668,8 +686,27 @@ static int local_utimensat(FsContext *s, V9fsPath *fs_path,
char buffer[PATH_MAX];
char *path = fs_path->data;
- return qemu_utimensat(AT_FDCWD, rpath(s, path, buffer), buf,
+ if (s->fs_sm == SM_PASSTHROUGH) {
+ int fd, retval, serrno = 0;
+ fd = passthrough_request(s, NULL, path,
+ O_RDONLY | O_NONBLOCK | O_NOFOLLOW, NULL, T_OPEN);
+ if (fd < 0) {
+ errno = -fd;
+ return -1;
+ }
+ retval = futimens(fd, buf);
+ if (retval < 0) {
+ serrno = errno;
+ }
+ close(fd);
+ if (retval < 0) {
+ errno = serrno;
+ }
+ return retval;
+ } else {
+ return qemu_utimensat(AT_FDCWD, rpath(s, path, buffer), buf,
AT_SYMLINK_NOFOLLOW);
+ }
}
static int local_remove(FsContext *ctx, const char *path)
--
1.7.6
- [Qemu-devel] [PATCH V12 00/15] virtio-9p: chroot environment for passthrough security model, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 12/15] hw/9pfs: chown in chroot environment, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 08/15] hw/9pfs: Removing file or directory in chroot environment, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 10/15] hw/9pfs: Move file post creation changes to none security model, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 14/15] hw/9pfs: readlink in chroot environment, M. Mohan Kumar, 2011/09/05
- [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 <=
- [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, 2011/09/05
- [Qemu-devel] [PATCH V12 03/15] hw/9pfs: Provide chroot worker side interfaces, M. Mohan Kumar, 2011/09/05