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f1e13d23e0
ID 0 serves as the sentinel DEVLINK_RESOURCE_ID_PARENT_TOP to mark
top-level resources. While it is technically possible to use 0 as a real
resource ID, a user might be tempted to write:
enum {
MY_RESOURCE_ID_A, /* == DEVLINK_RESOURCE_ID_PARENT_TOP ! */
MY_RESOURCE_ID_B,
MY_RESOURCE_ID_C,
MY_RESOURCE_ID_D,
...
};
register(..., MY_RESOURCE_ID_C, DEVLINK_RESOURCE_ID_PARENT_TOP, ...);
register(..., MY_RESOURCE_ID_D, MY_RESOURCE_ID_C, ...);
/* D is a child of C */
register(..., MY_RESOURCE_ID_A, DEVLINK_RESOURCE_ID_PARENT_TOP, ...);
register(..., MY_RESOURCE_ID_B, MY_RESOURCE_ID_A, ...);
/* Is B intentionally top-level, or is it actually a child of A? */
Add a WARN_ON() to catch this and prevent confusion.
Signed-off-by: David Yang <mmyangfl@gmail.com>
Link: https://patch.msgid.link/20260611070856.889700-6-mmyangfl@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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| .. | ||
| core.c | ||
| dev.c | ||
| devl_internal.h | ||
| dpipe.c | ||
| health.c | ||
| linecard.c | ||
| Makefile | ||
| netlink_gen.c | ||
| netlink_gen.h | ||
| netlink.c | ||
| param.c | ||
| port.c | ||
| rate.c | ||
| region.c | ||
| resource.c | ||
| sb.c | ||
| sh_dev.c | ||
| trap.c | ||