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NLM: Support IPv6 scope IDs in nlm_display_address()

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Scope ID support is needed since the kernel's NSM implementation is
about to use these displayed addresses as a mon_name in some cases.

When nsm_use_hostnames is zero, without scope ID support NSM will fail
to handle peers that contact us via a link-local address.  Link-local
addresses do not work without an interface ID, which is stored in the
sockaddr's sin6_scope_id field.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Chuck Lever 2008-12-04 14:20:08 -05:00 • committed by J. Bruce Fields
parent 6999fb4016
commit bc995801a0
2 changed files with 24 additions and 7 deletions
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10
include/linux/lockd/lockd.h
View file

@ -68,6 +68,14 @@ struct nlm_host {
char *h_addrbuf; /* address eyecatcher */
};
/*
* The largest string sm_addrbuf should hold is a full-size IPv6 address
* (no "::" anywhere) with a scope ID. The buffer size is computed to
* hold eight groups of colon-separated four-hex-digit numbers, a
* percent sign, a scope id (at most 32 bits, in decimal), and NUL.
*/
#define NSM_ADDRBUF ((8 * 4 + 7) + (1 + 10) + 1)
struct nsm_handle {
struct list_head sm_link;
atomic_t sm_count;
@ -76,7 +84,7 @@ struct nsm_handle {
size_t sm_addrlen;
unsigned int sm_monitored : 1,
sm_sticky : 1; /* don't unmonitor */
char sm_addrbuf[48]; /* address eyecatcher */
char sm_addrbuf[NSM_ADDRBUF];
};
/*