[Qemu-devel] [PATCH v4] numa: clarify error message when node index is out of range in -numa dist, ...

[Igor Mammedov]

When using following CLI:
-numa dist,src=128,dst=1,val=20
user gets a rather confusing error message:
"Invalid node 128, max possible could be 128"

Where 128 is number of nodes that QEMU supports (MAX_NODES),
while src/dst is an index up to that limit, so it should be
MAX_NODES - 1 in error message.
Make error message to explicitly state valid range for node
index to be more clear.

Signed-off-by: Igor Mammedov <***@redhat.com>
---
v4:
- e error message suggested by Markus
v3:
- s/,/./ in error message
- add '.' at the end of sentence
---
numa.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/numa.c b/numa.c
index 188bfdf..33572bf 100644
--- a/numa.c
+++ b/numa.c
@@ -141,9 +141,8 @@ static void parse_numa_distance(NumaDistOptions *dist, Error **errp)
uint8_t val = dist->val;

if (src >= MAX_NODES || dst >= MAX_NODES) {
- error_setg(errp,
- "Invalid node %d, max possible could be %d",
- MAX(src, dst), MAX_NODES);
+ error_setg(errp, "Parameter '%s' expects an integer between 0 and %d",
+ src >= MAX_NODES ? "src" : "dst", MAX_NODES - 1);
return;
}

[Eric Blake]

Post by Igor Mammedov
-numa dist,src=128,dst=1,val=20
"Invalid node 128, max possible could be 128"
Where 128 is number of nodes that QEMU supports (MAX_NODES),
while src/dst is an index up to that limit, so it should be
MAX_NODES - 1 in error message.
Make error message to explicitly state valid range for node
index to be more clear.
---

Reviewed-by: Eric Blake <***@redhat.com>

[Eduardo Habkost]

Post by Igor Mammedov
-numa dist,src=128,dst=1,val=20
"Invalid node 128, max possible could be 128"
Where 128 is number of nodes that QEMU supports (MAX_NODES),
while src/dst is an index up to that limit, so it should be
MAX_NODES - 1 in error message.
Make error message to explicitly state valid range for node
index to be more clear.

Queued, thanks.