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[Qemu-devel] [PATCH v3 1/2] qapi: Create DEFINE_PROP_STRING_LEN
From: |
Alex Williamson |
Subject: |
[Qemu-devel] [PATCH v3 1/2] qapi: Create DEFINE_PROP_STRING_LEN |
Date: |
Fri, 16 Oct 2015 12:54:05 -0600 |
User-agent: |
StGit/0.17.1-dirty |
A slight addition to set_string(), which optionally tests that the
string length is within the bounds specified.
Signed-off-by: Alex Williamson <address@hidden>
---
hw/core/qdev-properties.c | 7 +++++++
include/hw/qdev-core.h | 1 +
include/hw/qdev-properties.h | 16 ++++++++++++++--
3 files changed, 22 insertions(+), 2 deletions(-)
diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c
index 33e245e..51a05c7 100644
--- a/hw/core/qdev-properties.c
+++ b/hw/core/qdev-properties.c
@@ -422,6 +422,13 @@ static void set_string(Object *obj, Visitor *v, void
*opaque,
error_propagate(errp, local_err);
return;
}
+
+ if (prop->strlen >= 0 && strlen(str) > prop->strlen) {
+ error_set_from_qdev_prop_error(errp, EINVAL, dev, prop, str);
+ g_free(str);
+ return;
+ }
+
g_free(*ptr);
*ptr = str;
}
diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index 8057aed..12e3031 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -244,6 +244,7 @@ struct Property {
int arrayoffset;
PropertyInfo *arrayinfo;
int arrayfieldsize;
+ int strlen;
};
struct PropertyInfo {
diff --git a/include/hw/qdev-properties.h b/include/hw/qdev-properties.h
index 77538a8..2a46640 100644
--- a/include/hw/qdev-properties.h
+++ b/include/hw/qdev-properties.h
@@ -69,6 +69,20 @@ extern PropertyInfo qdev_prop_arraylen;
.qtype = QTYPE_QBOOL, \
.defval = (bool)_defval, \
}
+#define DEFINE_PROP_STRING(_name, _state, _field) { \
+ .name = (_name), \
+ .info = &(qdev_prop_string), \
+ .strlen = -1, \
+ .offset = offsetof(_state, _field) \
+ + type_check(char*, typeof_field(_state, _field)), \
+ }
+#define DEFINE_PROP_STRING_LEN(_name, _state, _field, _strlen) { \
+ .name = (_name), \
+ .info = &(qdev_prop_string), \
+ .strlen = (_strlen), \
+ .offset = offsetof(_state, _field) \
+ + type_check(char*, typeof_field(_state, _field)), \
+ }
#define PROP_ARRAY_LEN_PREFIX "len-"
@@ -144,8 +158,6 @@ extern PropertyInfo qdev_prop_arraylen;
#define DEFINE_PROP_CHR(_n, _s, _f) \
DEFINE_PROP(_n, _s, _f, qdev_prop_chr, CharDriverState*)
-#define DEFINE_PROP_STRING(_n, _s, _f) \
- DEFINE_PROP(_n, _s, _f, qdev_prop_string, char*)
#define DEFINE_PROP_NETDEV(_n, _s, _f) \
DEFINE_PROP(_n, _s, _f, qdev_prop_netdev, NICPeers)
#define DEFINE_PROP_VLAN(_n, _s, _f) \