From 8251a72f8bb8764c13dd5ba627e7d9e6d35d188e Mon Sep 17 00:00:00 2001 From: Michael Roth Date: Thu, 23 Mar 2017 15:24:32 -0500 Subject: qga: don't fail if mount doesn't have slave devices In some cases the slave devices of a virtual block device are tracked by the parent in the corresponding sysfs node. For instance, if we have a loop-back mount of the form: /dev/loop3p1 on /home/mdroth/mnt type ext4 (rw,relatime,data=ordered) this will be reflected in sysfs as: /sys/devices/virtual/block/loop3/ ... /sys/devices/virtual/block/loop3/slaves /sys/devices/virtual/block/loop3/loop3p1 The current code however assumes the mounted virtual block device, loop3p1 in this case, contains the slaves directory, and reports an error otherwise. This breaks 'make check' in certain environments. Fix this by simply skipping attempts to generate disk topology information in these cases. Since this information is documented in QAPI as optionally-reported, this should be ok from an API perspective. In the future, this can possibly be improved upon by collecting topology information from the parent in these cases. Reported-by: Peter Maydell Cc: Peter Maydell Signed-off-by: Michael Roth Tested-by: Peter Maydell --- qga/commands-posix.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'qga') diff --git a/qga/commands-posix.c b/qga/commands-posix.c index 73d93eb5ce..915df9ed90 100644 --- a/qga/commands-posix.c +++ b/qga/commands-posix.c @@ -999,7 +999,9 @@ static void build_guest_fsinfo_for_virtual_device(char const *syspath, dirpath = g_strdup_printf("%s/slaves", syspath); dir = opendir(dirpath); if (!dir) { - error_setg_errno(errp, errno, "opendir(\"%s\")", dirpath); + if (errno != ENOENT) { + error_setg_errno(errp, errno, "opendir(\"%s\")", dirpath); + } g_free(dirpath); return; } -- cgit v1.2.1