diff options
| -rw-r--r-- | block/partitions/cmdline.c | 49 |
1 files changed, 12 insertions, 37 deletions
diff --git a/block/partitions/cmdline.c b/block/partitions/cmdline.c index c03bc105e575..152c85df92b2 100644 --- a/block/partitions/cmdline.c +++ b/block/partitions/cmdline.c @@ -70,8 +70,8 @@ static int parse_subpart(struct cmdline_subpart **subpart, char *partdef) } if (*partdef == '(') { - int length; - char *next = strchr(++partdef, ')'); + partdef++; + char *next = strsep(&partdef, ")"); if (!next) { pr_warn("cmdline partition format is invalid."); @@ -79,11 +79,7 @@ static int parse_subpart(struct cmdline_subpart **subpart, char *partdef) goto fail; } - length = min_t(int, next - partdef, - sizeof(new_subpart->name) - 1); - strscpy(new_subpart->name, partdef, length); - - partdef = ++next; + strscpy(new_subpart->name, next, sizeof(new_subpart->name)); } else new_subpart->name[0] = '\0'; @@ -117,14 +113,12 @@ static void free_subpart(struct cmdline_parts *parts) } } -static int parse_parts(struct cmdline_parts **parts, const char *bdevdef) +static int parse_parts(struct cmdline_parts **parts, char *bdevdef) { int ret = -EINVAL; char *next; - int length; struct cmdline_subpart **next_subpart; struct cmdline_parts *newparts; - char buf[BDEVNAME_SIZE + 32 + 4]; *parts = NULL; @@ -132,28 +126,19 @@ static int parse_parts(struct cmdline_parts **parts, const char *bdevdef) if (!newparts) return -ENOMEM; - next = strchr(bdevdef, ':'); + next = strsep(&bdevdef, ":"); if (!next) { pr_warn("cmdline partition has no block device."); goto fail; } - length = min_t(int, next - bdevdef, sizeof(newparts->name) - 1); - strscpy(newparts->name, bdevdef, length); + strscpy(newparts->name, next, sizeof(newparts->name)); newparts->nr_subparts = 0; next_subpart = &newparts->subpart; - while (next && *(++next)) { - bdevdef = next; - next = strchr(bdevdef, ','); - - length = (!next) ? (sizeof(buf) - 1) : - min_t(int, next - bdevdef, sizeof(buf) - 1); - - strscpy(buf, bdevdef, length); - - ret = parse_subpart(next_subpart, buf); + while ((next = strsep(&bdevdef, ","))) { + ret = parse_subpart(next_subpart, next); if (ret) goto fail; @@ -199,24 +184,17 @@ static int cmdline_parts_parse(struct cmdline_parts **parts, *parts = NULL; - next = pbuf = buf = kstrdup(cmdline, GFP_KERNEL); + pbuf = buf = kstrdup(cmdline, GFP_KERNEL); if (!buf) return -ENOMEM; next_parts = parts; - while (next && *pbuf) { - next = strchr(pbuf, ';'); - if (next) - *next = '\0'; - - ret = parse_parts(next_parts, pbuf); + while ((next = strsep(&pbuf, ";"))) { + ret = parse_parts(next_parts, next); if (ret) goto fail; - if (next) - pbuf = ++next; - next_parts = &(*next_parts)->next_parts; } @@ -250,7 +228,6 @@ static struct cmdline_parts *bdev_parts; static int add_part(int slot, struct cmdline_subpart *subpart, struct parsed_partitions *state) { - int label_min; struct partition_meta_info *info; char tmp[sizeof(info->volname) + 4]; @@ -262,9 +239,7 @@ static int add_part(int slot, struct cmdline_subpart *subpart, info = &state->parts[slot].info; - label_min = min_t(int, sizeof(info->volname) - 1, - sizeof(subpart->name)); - strscpy(info->volname, subpart->name, label_min); + strscpy(info->volname, subpart->name, sizeof(info->volname)); snprintf(tmp, sizeof(tmp), "(%s)", info->volname); strlcat(state->pp_buf, tmp, PAGE_SIZE); |