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lvmlockd: fix snprintf warnings

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This commit is contained in:
David Teigland 2019-05-02 12:41:00 -05:00
parent 0046c4e7a7
commit 81735b46d9
3 changed files with 24 additions and 12 deletions
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8
daemons/lvmlockd/lvmlockd-core.c
View File

@ -2230,7 +2230,7 @@ static void *lockspace_thread_main(void *arg_in)
struct action *act_op_free = NULL;
struct list_head tmp_act;
struct list_head act_close;
char tmp_name[MAX_NAME+1];
char tmp_name[MAX_NAME+5];
int free_vg = 0;
int drop_vg = 0;
int error = 0;
@ -2624,8 +2624,10 @@ out_act:
* blank or fill it with garbage, but instead set it to REM:<name>
* to make it easier to follow progress of freeing is via log_debug.
*/
dm_strncpy(tmp_name, ls->name, sizeof(tmp_name));
snprintf(ls->name, sizeof(ls->name), "REM:%s", tmp_name);
memset(tmp_name, 0, sizeof(tmp_name));
memcpy(tmp_name, "REM:", 4);
strncpy(tmp_name+4, ls->name, sizeof(tmp_name)-4);
memcpy(ls->name, tmp_name, sizeof(ls->name));
pthread_mutex_unlock(&lockspaces_mutex);
/* worker_thread will join this thread, and free the ls */

10
daemons/lvmlockd/lvmlockd-dlm.c
View File

@ -128,16 +128,18 @@ static int read_cluster_name(char *clustername)
return 0;
}
#define MAX_VERSION 16
int lm_init_vg_dlm(char *ls_name, char *vg_name, uint32_t flags, char *vg_args)
{
char clustername[MAX_ARGS+1];
char lock_args_version[MAX_ARGS+1];
char lock_args_version[MAX_VERSION+1];
int rv;
memset(clustername, 0, sizeof(clustername));
memset(lock_args_version, 0, sizeof(lock_args_version));
snprintf(lock_args_version, MAX_ARGS, "%u.%u.%u",
snprintf(lock_args_version, MAX_VERSION, "%u.%u.%u",
VG_LOCK_ARGS_MAJOR, VG_LOCK_ARGS_MINOR, VG_LOCK_ARGS_PATCH);
rv = read_cluster_name(clustername);
@ -149,7 +151,9 @@ int lm_init_vg_dlm(char *ls_name, char *vg_name, uint32_t flags, char *vg_args)
return -EARGS;
}
snprintf(vg_args, MAX_ARGS, "%s:%s", lock_args_version, clustername);
rv = snprintf(vg_args, MAX_ARGS, "%s:%s", lock_args_version, clustername);
if (rv >= MAX_ARGS)
log_debug("init_vg_dlm vg_args may be too long %d %s", rv, vg_args);
rv = 0;
log_debug("init_vg_dlm done %s vg_args %s", ls_name, vg_args);

18
daemons/lvmlockd/lvmlockd-sanlock.c
View File

@ -500,13 +500,15 @@ static int get_sizes_lockspace(char *path, int *sector_size, int *align_size)
* version and lv name, and returns the real lock_args in vg_args.
*/
#define MAX_VERSION 16
int lm_init_vg_sanlock(char *ls_name, char *vg_name, uint32_t flags, char *vg_args)
{
struct sanlk_lockspace ss;
struct sanlk_resourced rd;
struct sanlk_disk disk;
char lock_lv_name[MAX_ARGS+1];
char lock_args_version[MAX_ARGS+1];
char lock_args_version[MAX_VERSION+1];
const char *gl_name = NULL;
uint32_t daemon_version;
uint32_t daemon_proto;
@ -526,7 +528,7 @@ int lm_init_vg_sanlock(char *ls_name, char *vg_name, uint32_t flags, char *vg_ar
return -EARGS;
}
snprintf(lock_args_version, MAX_ARGS, "%u.%u.%u",
snprintf(lock_args_version, MAX_VERSION, "%u.%u.%u",
VG_LOCK_ARGS_MAJOR, VG_LOCK_ARGS_MINOR, VG_LOCK_ARGS_PATCH);
/* see comment above about input vg_args being only lock_lv_name */
@ -543,7 +545,9 @@ int lm_init_vg_sanlock(char *ls_name, char *vg_name, uint32_t flags, char *vg_ar
if (daemon_test) {
if (!gl_lsname_sanlock[0])
strncpy(gl_lsname_sanlock, ls_name, MAX_NAME);
snprintf(vg_args, MAX_ARGS, "%s:%s", lock_args_version, lock_lv_name);
rv = snprintf(vg_args, MAX_ARGS, "%s:%s", lock_args_version, lock_lv_name);
if (rv >= MAX_ARGS)
log_debug("init_vg_san vg_args may be too long %d %s", rv, vg_args);
return 0;
}
@ -635,7 +639,9 @@ int lm_init_vg_sanlock(char *ls_name, char *vg_name, uint32_t flags, char *vg_ar
if (!strcmp(gl_name, R_NAME_GL))
strncpy(gl_lsname_sanlock, ls_name, MAX_NAME);
snprintf(vg_args, MAX_ARGS, "%s:%s", lock_args_version, lock_lv_name);
rv = snprintf(vg_args, MAX_ARGS, "%s:%s", lock_args_version, lock_lv_name);
if (rv >= MAX_ARGS)
log_debug("init_vg_san vg_args may be too long %d %s", rv, vg_args);
log_debug("S %s init_vg_san done vg_args %s", ls_name, vg_args);
@ -692,7 +698,7 @@ int lm_init_lv_sanlock(char *ls_name, char *vg_name, char *lv_name,
{
struct sanlk_resourced rd;
char lock_lv_name[MAX_ARGS+1];
char lock_args_version[MAX_ARGS+1];
char lock_args_version[MAX_VERSION+1];
uint64_t offset;
int rv;
@ -707,7 +713,7 @@ int lm_init_lv_sanlock(char *ls_name, char *vg_name, char *lv_name,
return rv;
}
snprintf(lock_args_version, MAX_ARGS, "%u.%u.%u",
snprintf(lock_args_version, MAX_VERSION, "%u.%u.%u",
LV_LOCK_ARGS_MAJOR, LV_LOCK_ARGS_MINOR, LV_LOCK_ARGS_PATCH);
if (daemon_test) {