External/libvirt
1
0
Fork 0
mirror of https://gitlab.com/libvirt/libvirt.git synced 2024-08-28 19:41:16 +00:00
Code Issues Packages Projects Releases Wiki Activity

Fix error detection in virStorageBackendISCSIGetHostNumber

Browse Source 
In the unlikely case the iSCSI session path exists, but does not
contain an entry starting with "target", we would silently use
an initialized value.

Rewrite the function to correctly report errors.
This commit is contained in:
Ján Tomko 2016-06-21 15:13:41 +02:00
parent 0f79480b9f
commit 83066f99a9
1 changed files with 20 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
src/storage/storage_backend_iscsi.c
View File

@ -91,7 +91,7 @@ static int
virStorageBackendISCSIGetHostNumber(const char *sysfs_path,
uint32_t *host)
{
int retval = 0;
int ret = -1;
DIR *sysdir = NULL;
struct dirent *dirent = NULL;
int direrr;
@ -100,27 +100,32 @@ virStorageBackendISCSIGetHostNumber(const char *sysfs_path,
virFileWaitForDevices();
if (virDirOpen(&sysdir, sysfs_path) < 0) {
retval = -1;
goto out;
}
if (virDirOpen(&sysdir, sysfs_path) < 0)
goto cleanup;
while ((direrr = virDirRead(sysdir, &dirent, sysfs_path)) > 0) {
if (STRPREFIX(dirent->d_name, "target")) {
if (sscanf(dirent->d_name,
"target%u:", host) != 1) {
VIR_DEBUG("Failed to parse target '%s'", dirent->d_name);
retval = -1;
break;
if (sscanf(dirent->d_name, "target%u:", host) == 1) {
ret = 0;
goto cleanup;
} else {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to parse target '%s'"), dirent->d_name);
goto cleanup;
}
}
}
if (direrr < 0)
retval = -1;
if (direrr == 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to get host number for iSCSI session "
"with path '%s'"), sysfs_path);
goto cleanup;
}
cleanup:
VIR_DIR_CLOSE(sysdir);
out:
return retval;
return ret;
}
static int
@ -135,13 +140,8 @@ virStorageBackendISCSIFindLUs(virStoragePoolObjPtr pool,
"/sys/class/iscsi_session/session%s/device", session) < 0)
goto cleanup;
if (virStorageBackendISCSIGetHostNumber(sysfs_path, &host) < 0) {
virReportSystemError(errno,
_("Failed to get host number for iSCSI session "
"with path '%s'"),
sysfs_path);
if (virStorageBackendISCSIGetHostNumber(sysfs_path, &host) < 0)
goto cleanup;
}
if (virStorageBackendSCSIFindLUs(pool, host) < 0)
goto cleanup;