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[cachedhcp] Allow cached DHCPACK to apply to temporary network devices

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Retain a reference to the cached DHCPACK until the late startup phase,
and allow it to be recycled for reuse.  This allows the cached DHCPACK
to be used for a temporary MNP network device and then subsequently
reused for the corresponding real network device.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2024-04-02 19:36:00 +01:00
parent b66f6025fa
commit b940d54235
3 changed files with 71 additions and 10 deletions
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2
src/include/ipxe/cachedhcp.h
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@@ -12,6 +12,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <stddef.h>
#include <ipxe/uaccess.h>
struct net_device;
struct cached_dhcp_packet;
extern struct cached_dhcp_packet cached_dhcpack;
@@ -21,5 +22,6 @@ extern struct cached_dhcp_packet cached_pxebs;
extern int cachedhcp_record ( struct cached_dhcp_packet *cache,
unsigned int vlan, userptr_t data,
size_t max_len );
extern void cachedhcp_recycle ( struct net_device *netdev );
#endif /* _IPXE_CACHEDHCP_H */