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| author | Stefan Hajnoczi <stefanha@redhat.com> | 2013-03-18 17:58:53 +0100 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2013-03-19 11:48:37 +0100 |
| commit | 4d70655bcb852ea0a006d3923f0b0a9c69ff462e (patch) | |
| tree | 07f0dec6ffc8266ccda62c70a12242c2c50d2801 /block.c | |
| parent | acdfb480ba7e2779bdbffb5280cf12ff6e43669c (diff) | |
| download | qemu-4d70655bcb852ea0a006d3923f0b0a9c69ff462e.tar.gz | |
block: fix BDRV_O_SNAPSHOT protocol detection
realpath(3) is used to get an absolute path to the image file when
creating a -drive snapshot=on temporary qcow2. This does not work for
protocols since their filenames ("proto:foo:...") do not correspond to
file system paths.
Commit 7c96d46ec245d73fd76726588409f9abe4bd5dc1 ("Let snapshot work with
protocols") skipped realpath(3) for protocols. Later on the "raw"
format was introduced and broke the check.
Use path_has_protocol(filename) to decide if this image uses a protocol
or a filename.
Reported-by: Richard Jones <rjones@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block.c')
| -rw-r--r-- | block.c | 6 |
1 files changed, 1 insertions, 5 deletions
@@ -830,7 +830,6 @@ int bdrv_open(BlockDriverState *bs, const char *filename, QDict *options, if (flags & BDRV_O_SNAPSHOT) { BlockDriverState *bs1; int64_t total_size; - int is_protocol = 0; BlockDriver *bdrv_qcow2; QEMUOptionParameter *options; char backing_filename[PATH_MAX]; @@ -847,9 +846,6 @@ int bdrv_open(BlockDriverState *bs, const char *filename, QDict *options, } total_size = bdrv_getlength(bs1) & BDRV_SECTOR_MASK; - if (bs1->drv && bs1->drv->protocol_name) - is_protocol = 1; - bdrv_delete(bs1); ret = get_tmp_filename(tmp_filename, sizeof(tmp_filename)); @@ -858,7 +854,7 @@ int bdrv_open(BlockDriverState *bs, const char *filename, QDict *options, } /* Real path is meaningless for protocols */ - if (is_protocol) { + if (path_has_protocol(filename)) { snprintf(backing_filename, sizeof(backing_filename), "%s", filename); } else if (!realpath(filename, backing_filename)) { |