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rbd: allow escaping in config string

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The config string is variously delimited by =, @, and /, depending on the
field.  Allow these characters to be escaped by preceeding them with \.

Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Sage Weil 2011-09-19 13:35:26 -07:00 committed by Kevin Wolf
parent cf26a4e6f8
commit 16a06b2430
1 changed files with 27 additions and 2 deletions
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29
block/rbd.c
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@ -102,8 +102,15 @@ static int qemu_rbd_next_tok(char *dst, int dst_len,
*p = NULL;
if (delim != '\0') {
end = strchr(src, delim);
if (end) {
for (end = src; *end; ++end) {
if (*end == delim) {
break;
}
if (*end == '\\' && end[1] != '\0') {
end++;
}
}
if (*end == delim) {
*p = end + 1;
*end = '\0';
}
@ -122,6 +129,19 @@ static int qemu_rbd_next_tok(char *dst, int dst_len,
return 0;
}
static void qemu_rbd_unescape(char *src)
{
char *p;
for (p = src; *src; ++src, ++p) {
if (*src == '\\' && src[1] != '\0') {
src++;
}
*p = *src;
}
*p = '\0';
}
static int qemu_rbd_parsename(const char *filename,
char *pool, int pool_len,
char *snap, int snap_len,
@ -146,6 +166,7 @@ static int qemu_rbd_parsename(const char *filename,
ret = -EINVAL;
goto done;
}
qemu_rbd_unescape(pool);
if (strchr(p, '@')) {
ret = qemu_rbd_next_tok(name, name_len, p, '@', "object name", &p);
@ -153,9 +174,11 @@ static int qemu_rbd_parsename(const char *filename,
goto done;
}
ret = qemu_rbd_next_tok(snap, snap_len, p, ':', "snap name", &p);
qemu_rbd_unescape(snap);
} else {
ret = qemu_rbd_next_tok(name, name_len, p, ':', "object name", &p);
}
qemu_rbd_unescape(name);
if (ret < 0 || !p) {
goto done;
}
@ -211,6 +234,7 @@ static int qemu_rbd_set_conf(rados_t cluster, const char *conf)
if (ret < 0) {
break;
}
qemu_rbd_unescape(name);
if (!p) {
error_report("conf option %s has no value", name);
@ -223,6 +247,7 @@ static int qemu_rbd_set_conf(rados_t cluster, const char *conf)
if (ret < 0) {
break;
}
qemu_rbd_unescape(value);
if (strcmp(name, "conf") == 0) {
ret = rados_conf_read_file(cluster, value);