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lvmlockd: improve dm path creation for sanlock LV

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Use devmapper function to create matching dm name with mangling.
Drop extra '-1' from buffer passed to snprintf.
This commit is contained in:
Zdenek Kabelac 2018-02-12 21:50:57 +01:00
parent 7239a45b79
commit 4f278324c7
1 changed files with 38 additions and 5 deletions
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43
daemons/lvmlockd/lvmlockd-sanlock.c
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@ -294,6 +294,36 @@ out:
return host_id;
}
/* Prepare valid /dev/mapper/vgname-lvname with all the mangling */
static int build_dm_path(char *path, size_t path_len,
const char *vg_name, const char *lv_name)
{
struct dm_pool *mem;
char *dm_name;
int rv = 0;
if (!(mem = dm_pool_create("namepool", 1024))) {
log_error("Failed to create mempool.");
return -ENOMEM;
}
if (!(dm_name = dm_build_dm_name(mem, vg_name, lv_name, NULL))) {
log_error("Failed to build dm name for %s/%s.", vg_name, lv_name);
rv = -EINVAL;
goto fail;
}
if ((dm_snprintf(path, path_len, "%s/%s", dm_dir(), dm_name) < 0)) {
log_error("Failed to create path %s/%s.", dm_dir(), dm_name);
rv = -EINVAL;
}
fail:
dm_pool_destroy(mem);
return rv;
}
/*
* vgcreate
*
@ -336,7 +366,8 @@ int lm_init_vg_sanlock(char *ls_name, char *vg_name, uint32_t flags, char *vg_ar
if (strlen(lock_lv_name) + strlen(lock_args_version) + 2 > MAX_ARGS)
return -EARGS;
snprintf(disk.path, SANLK_PATH_LEN-1, "/dev/mapper/%s-%s", vg_name, lock_lv_name);
if ((rv = build_dm_path(disk.path, SANLK_PATH_LEN, vg_name, lock_lv_name)))
return rv;
log_debug("S %s init_vg_san path %s", ls_name, disk.path);
@ -513,7 +544,8 @@ int lm_init_lv_sanlock(char *ls_name, char *vg_name, char *lv_name,
strncpy(rd.rs.lockspace_name, ls_name, SANLK_NAME_LEN);
rd.rs.num_disks = 1;
snprintf(rd.rs.disks[0].path, SANLK_PATH_LEN-1, "/dev/mapper/%s-%s", vg_name, lock_lv_name);
if ((rv = build_dm_path(rd.rs.disks[0].path, SANLK_PATH_LEN, vg_name, lock_lv_name)))
return rv;
align_size = sanlock_align(&rd.rs.disks[0]);
if (align_size <= 0) {
@ -612,7 +644,8 @@ int lm_rename_vg_sanlock(char *ls_name, char *vg_name, uint32_t flags, char *vg_
return rv;
}
snprintf(disk.path, SANLK_PATH_LEN-1, "/dev/mapper/%s-%s", vg_name, lock_lv_name);
if ((rv = build_dm_path(disk.path, SANLK_PATH_LEN, vg_name, lock_lv_name)))
return rv;
log_debug("S %s rename_vg_san path %s", ls_name, disk.path);
@ -1088,8 +1121,8 @@ int lm_prepare_lockspace_sanlock(struct lockspace *ls)
goto fail;
}
snprintf(disk_path, SANLK_PATH_LEN-1, "/dev/mapper/%s-%s",
ls->vg_name, lock_lv_name);
if ((rv = build_dm_path(disk_path, SANLK_PATH_LEN, ls->vg_name, lock_lv_name)))
goto fail;
/*
* When a vg is started, the internal sanlock lv should be