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[Qemu-devel] [PATCH 01/24] block: allow resizing of images residing on h
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [PATCH 01/24] block: allow resizing of images residing on host devices |
Date: |
Fri, 14 Oct 2011 18:48:56 +0200 |
From: Christoph Hellwig <address@hidden>
Allow to resize images that reside on host devices up to the available
space. This allows to grow images after resizing the device manually or
vice versa.
Signed-off-by: Christoph Hellwig <address@hidden>
Signed-off-by: Kevin Wolf <address@hidden>
---
block/raw-posix.c | 24 +++++++++++++++++++++---
1 files changed, 21 insertions(+), 3 deletions(-)
diff --git a/block/raw-posix.c b/block/raw-posix.c
index 305998d..0b5e225 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -649,10 +649,24 @@ static void raw_close(BlockDriverState *bs)
static int raw_truncate(BlockDriverState *bs, int64_t offset)
{
BDRVRawState *s = bs->opaque;
- if (s->type != FTYPE_FILE)
- return -ENOTSUP;
- if (ftruncate(s->fd, offset) < 0)
+ struct stat st;
+
+ if (fstat(s->fd, &st)) {
return -errno;
+ }
+
+ if (S_ISREG(st.st_mode)) {
+ if (ftruncate(s->fd, offset) < 0) {
+ return -errno;
+ }
+ } else if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
+ if (offset > raw_getlength(bs)) {
+ return -EINVAL;
+ }
+ } else {
+ return -ENOTSUP;
+ }
+
return 0;
}
@@ -1178,6 +1192,7 @@ static BlockDriver bdrv_host_device = {
.bdrv_read = raw_read,
.bdrv_write = raw_write,
+ .bdrv_truncate = raw_truncate,
.bdrv_getlength = raw_getlength,
.bdrv_get_allocated_file_size
= raw_get_allocated_file_size,
@@ -1299,6 +1314,7 @@ static BlockDriver bdrv_host_floppy = {
.bdrv_read = raw_read,
.bdrv_write = raw_write,
+ .bdrv_truncate = raw_truncate,
.bdrv_getlength = raw_getlength,
.bdrv_get_allocated_file_size
= raw_get_allocated_file_size,
@@ -1400,6 +1416,7 @@ static BlockDriver bdrv_host_cdrom = {
.bdrv_read = raw_read,
.bdrv_write = raw_write,
+ .bdrv_truncate = raw_truncate,
.bdrv_getlength = raw_getlength,
.bdrv_get_allocated_file_size
= raw_get_allocated_file_size,
@@ -1521,6 +1538,7 @@ static BlockDriver bdrv_host_cdrom = {
.bdrv_read = raw_read,
.bdrv_write = raw_write,
+ .bdrv_truncate = raw_truncate,
.bdrv_getlength = raw_getlength,
.bdrv_get_allocated_file_size
= raw_get_allocated_file_size,
--
1.7.6.4
- [Qemu-devel] [PULL 00/24] Block patches, Kevin Wolf, 2011/10/14
- [Qemu-devel] [PATCH 01/24] block: allow resizing of images residing on host devices,
Kevin Wolf <=
- [Qemu-devel] [PATCH 02/24] linux-aio: Fix laio_submit error handling, Kevin Wolf, 2011/10/14
- [Qemu-devel] [PATCH 03/24] block: Keep track of devices' I/O status, Kevin Wolf, 2011/10/14
- [Qemu-devel] [PATCH 04/24] virtio: Support I/O status, Kevin Wolf, 2011/10/14
- [Qemu-devel] [PATCH 05/24] ide: Support I/O status, Kevin Wolf, 2011/10/14
- [Qemu-devel] [PATCH 07/24] QMP: query-status: Add 'io-status' key, Kevin Wolf, 2011/10/14
- [Qemu-devel] [PATCH 08/24] HMP: Print 'io-status' information, Kevin Wolf, 2011/10/14
- [Qemu-devel] [PATCH 09/24] block/vvfat: Fix potential memory leaks and other memory errors, Kevin Wolf, 2011/10/14
- [Qemu-devel] [PATCH 06/24] scsi: Support I/O status, Kevin Wolf, 2011/10/14
- [Qemu-devel] [PATCH 13/24] block: directly invoke .bdrv_* from emulation functions, Kevin Wolf, 2011/10/14
- [Qemu-devel] [PATCH 11/24] vvfat: Fix potential buffer overflow, Kevin Wolf, 2011/10/14