Commit 4d90452c authored by NeilBrown's avatar NeilBrown Committed by Linus Torvalds

[PATCH] knfsd: Remove DefineCacheLookup

This has been replaced by more traditional code.
Signed-off-by: default avatarNeil Brown <neilb@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 4013edea
......@@ -128,119 +128,6 @@ struct cache_deferred_req {
int too_many);
};
/*
* just like a template in C++, this macro does cache lookup
* for us.
* The function is passed some sort of HANDLE from which a cache_detail
* structure can be determined (via SETUP, DETAIL), a template
* cache entry (type RTN*), and a "set" flag. Using the HASHFN and the
* TEST, the function will try to find a matching cache entry in the cache.
* If "set" == 0 :
* If an entry is found, it is returned
* If no entry is found, a new non-VALID entry is created.
* If "set" == 1 :
* If no entry is found a new one is inserted with data from "template"
* If a non-CACHE_VALID entry is found, it is updated from template using UPDATE
* If a CACHE_VALID entry is found, a new entry is swapped in with data
* from "template"
*
* If the passed handle has the CACHE_NEGATIVE flag set, then UPDATE is not
* run but insteead CACHE_NEGATIVE is set in any new item.
* In any case, the new entry is returned with a reference count.
*
*
* RTN is a struct type for a cache entry
* MEMBER is the member of the cache which is cache_head, which must be first
* FNAME is the name for the function
* ARGS are arguments to function and must contain RTN *item, int set. May
* also contain something to be usedby SETUP or DETAIL to find cache_detail.
* SETUP locates the cache detail and makes it available as...
* DETAIL identifies the cache detail, possibly set up by SETUP
* HASHFN returns a hash value of the cache entry "item"
* TEST tests if "tmp" matches "item"
* INIT copies key information from "item" to "new"
* UPDATE copies content information from "item" to "tmp"
*/
#define DefineCacheLookup(RTN,MEMBER,FNAME,ARGS,SETUP,DETAIL,HASHFN,TEST,INIT,UPDATE) \
RTN *FNAME ARGS \
{ \
RTN *tmp, *new=NULL; \
struct cache_head **hp, **head; \
SETUP; \
head = &(DETAIL)->hash_table[HASHFN]; \
retry: \
if (set||new) write_lock(&(DETAIL)->hash_lock); \
else read_lock(&(DETAIL)->hash_lock); \
for(hp=head; *hp != NULL; hp = &tmp->MEMBER.next) { \
tmp = container_of(*hp, RTN, MEMBER); \
if (TEST) { /* found a match */ \
\
if (set && test_bit(CACHE_VALID, &tmp->MEMBER.flags) && !new) \
break; \
\
if (new) \
{INIT;} \
if (set) { \
if (test_bit(CACHE_VALID, &tmp->MEMBER.flags))\
{ /* need to swap in new */ \
RTN *t2; \
\
new->MEMBER.next = tmp->MEMBER.next; \
*hp = &new->MEMBER; \
tmp->MEMBER.next = NULL; \
t2 = tmp; tmp = new; new = t2; \
} \
if (test_bit(CACHE_NEGATIVE, &item->MEMBER.flags)) \
set_bit(CACHE_NEGATIVE, &tmp->MEMBER.flags); \
else { \
UPDATE; \
clear_bit(CACHE_NEGATIVE, &tmp->MEMBER.flags); \
} \
} \
cache_get(&tmp->MEMBER); \
if (set||new) write_unlock(&(DETAIL)->hash_lock); \
else read_unlock(&(DETAIL)->hash_lock); \
if (set) \
cache_fresh(DETAIL, &tmp->MEMBER, item->MEMBER.expiry_time); \
if (set && new) cache_fresh(DETAIL, &new->MEMBER, 0); \
if (new) (DETAIL)->cache_put(&new->MEMBER, DETAIL); \
return tmp; \
} \
} \
/* Didn't find anything */ \
if (new) { \
INIT; \
new->MEMBER.next = *head; \
*head = &new->MEMBER; \
(DETAIL)->entries ++; \
cache_get(&new->MEMBER); \
if (set) { \
tmp = new; \
if (test_bit(CACHE_NEGATIVE, &item->MEMBER.flags)) \
set_bit(CACHE_NEGATIVE, &tmp->MEMBER.flags); \
else {UPDATE;} \
} \
} \
if (set||new) write_unlock(&(DETAIL)->hash_lock); \
else read_unlock(&(DETAIL)->hash_lock); \
if (new && set) \
cache_fresh(DETAIL, &new->MEMBER, item->MEMBER.expiry_time); \
if (new) \
return new; \
new = kmalloc(sizeof(*new), GFP_KERNEL); \
if (new) { \
cache_init(&new->MEMBER); \
goto retry; \
} \
return NULL; \
}
#define DefineSimpleCacheLookup(STRUCT, FUNC) \
DefineCacheLookup(struct STRUCT, h, FUNC##_lookup, \
(struct STRUCT *item, int set), /*no setup */, \
& FUNC##_cache, FUNC##_hash(item), FUNC##_match(item, tmp), \
STRUCT##_init(new, item), STRUCT##_update(tmp, item))
extern struct cache_head *
sunrpc_cache_lookup(struct cache_detail *detail,
......
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