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190 lines
5.2 KiB

---
kpartx/devmapper.c | 17 +++++++++++++--
kpartx/devmapper.h | 2 -
kpartx/kpartx.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++---
3 files changed, 69 insertions(+), 7 deletions(-)
Index: multipath-tools-130222/kpartx/devmapper.c
===================================================================
--- multipath-tools-130222.orig/kpartx/devmapper.c
+++ multipath-tools-130222/kpartx/devmapper.c
@@ -140,12 +140,16 @@ addout:
}
extern int
-dm_map_present (char * str)
+dm_map_present (char * str, char **uuid)
{
int r = 0;
struct dm_task *dmt;
+ const char *uuidtmp;
struct dm_info info;
+ if (uuid)
+ *uuid = NULL;
+
if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
return 0;
@@ -160,8 +164,15 @@ dm_map_present (char * str)
if (!dm_task_get_info(dmt, &info))
goto out;
- if (info.exists)
- r = 1;
+ if (!info.exists)
+ goto out;
+
+ r = 1;
+ if (uuid) {
+ uuidtmp = dm_task_get_uuid(dmt);
+ if (uuidtmp && strlen(uuidtmp))
+ *uuid = strdup(uuidtmp);
+ }
out:
dm_task_destroy(dmt);
return r;
Index: multipath-tools-130222/kpartx/devmapper.h
===================================================================
--- multipath-tools-130222.orig/kpartx/devmapper.h
+++ multipath-tools-130222/kpartx/devmapper.h
@@ -14,7 +14,7 @@ int dm_prereq (char *, int, int, int);
int dm_simplecmd (int, const char *, int, uint32_t *, uint16_t);
int dm_addmap (int, const char *, const char *, const char *, uint64_t,
int, const char *, int, mode_t, uid_t, gid_t, uint32_t *);
-int dm_map_present (char *);
+int dm_map_present (char *, char **);
char * dm_mapname(int major, int minor);
dev_t dm_get_first_dep(char *devname);
char * dm_mapuuid(int major, int minor);
Index: multipath-tools-130222/kpartx/kpartx.c
===================================================================
--- multipath-tools-130222.orig/kpartx/kpartx.c
+++ multipath-tools-130222/kpartx/kpartx.c
@@ -191,6 +191,21 @@ get_hotplug_device(void)
return device;
}
+static int
+check_uuid(char *uuid, char *part_uuid, char **err_msg) {
+ char *map_uuid = strchr(part_uuid, '-');
+ if (!map_uuid || strncmp(part_uuid, "part", 4) != 0) {
+ *err_msg = "not a kpartx partition";
+ return -1;
+ }
+ map_uuid++;
+ if (strcmp(uuid, map_uuid) != 0) {
+ *err_msg = "a partition of a different device";
+ return -1;
+ }
+ return 0;
+}
+
int
main(int argc, char **argv){
int i, j, m, n, op, off, arg, ro=0;
@@ -410,6 +425,8 @@ main(int argc, char **argv){
case DELETE:
for (j = MAXSLICES-1; j >= 0; j--) {
+ char *part_uuid, *reason;
+
if (safe_sprintf(partname, "%s%s%d",
mapname, delim, j+1)) {
fprintf(stderr, "partname too small\n");
@@ -417,9 +434,18 @@ main(int argc, char **argv){
}
strip_slash(partname);
- if (!dm_map_present(partname))
+ if (!dm_map_present(partname, &part_uuid))
continue;
+ if (part_uuid && uuid) {
+ if (check_uuid(uuid, part_uuid, &reason) != 0) {
+ fprintf(stderr, "%s is %s. Not removing\n", partname, reason);
+ free(part_uuid);
+ continue;
+ }
+ free(part_uuid);
+ }
+
if (!dm_simplecmd(DM_DEVICE_REMOVE, partname,
0, &cookie, 0)) {
r++;
@@ -444,6 +470,8 @@ main(int argc, char **argv){
case UPDATE:
/* ADD and UPDATE share the same code that adds new partitions. */
for (j = 0; j < n; j++) {
+ char *part_uuid, *reason;
+
if (slices[j].size == 0)
continue;
@@ -460,9 +488,19 @@ main(int argc, char **argv){
exit(1);
}
- op = (dm_map_present(partname) ?
+ op = (dm_map_present(partname, &part_uuid) ?
DM_DEVICE_RELOAD : DM_DEVICE_CREATE);
+ if (part_uuid && uuid) {
+ if (check_uuid(uuid, part_uuid, &reason) != 0) {
+ fprintf(stderr, "%s is already in use, and %s\n", partname, reason);
+ r++;
+ free(part_uuid);
+ continue;
+ }
+ free(part_uuid);
+ }
+
if (!dm_addmap(op, partname, DM_TARGET, params,
slices[j].size, ro, uuid, j+1,
buf.st_mode & 0777, buf.st_uid,
@@ -470,6 +508,7 @@ main(int argc, char **argv){
fprintf(stderr, "create/reload failed on %s\n",
partname);
r++;
+ continue;
}
if (op == DM_DEVICE_RELOAD &&
!dm_simplecmd(DM_DEVICE_RESUME, partname,
@@ -477,6 +516,7 @@ main(int argc, char **argv){
fprintf(stderr, "resume failed on %s\n",
partname);
r++;
+ continue;
}
dm_devn(partname, &slices[j].major,
&slices[j].minor);
@@ -494,6 +534,7 @@ main(int argc, char **argv){
}
for (j = MAXSLICES-1; j >= 0; j--) {
+ char *part_uuid, *reason;
if (safe_sprintf(partname, "%s%s%d",
mapname, delim, j+1)) {
fprintf(stderr, "partname too small\n");
@@ -501,9 +542,19 @@ main(int argc, char **argv){
}
strip_slash(partname);
- if (slices[j].size || !dm_map_present(partname))
+ if (slices[j].size ||
+ !dm_map_present(partname, &part_uuid))
continue;
+ if (part_uuid && uuid) {
+ if (check_uuid(uuid, part_uuid, &reason) != 0) {
+ fprintf(stderr, "%s is %s. Not removing\n", partname, reason);
+ free(part_uuid);
+ continue;
+ }
+ free(part_uuid);
+ }
+
if (!dm_simplecmd(DM_DEVICE_REMOVE,
partname, 1, &cookie, 0)) {
r++;