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infra: better hash distribution

This commit is contained in:
Thomas Schoebel-Theuer 2020-08-20 08:50:49 +02:00 committed by Thomas Schoebel-Theuer
parent 3b3801d23a
commit 7f65652f74
1 changed files with 7 additions and 1 deletions
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8
kernel/sy_old/sy_generic.c
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@ -1462,6 +1462,7 @@ int mars_filler(void *__buf, const char *name, int namlen, loff_t offset,
// end_remove_this
struct mars_dent *dent;
char *newpath;
unsigned char digest[MARS_DIGEST_SIZE];
int hash;
int prefix = 0;
int pathlen;
@ -1494,6 +1495,11 @@ int mars_filler(void *__buf, const char *name, int namlen, loff_t offset,
pathlen += namlen;
newpath[pathlen] = '\0';
mars_digest(MREF_CHKSUM_CRC32C,
NULL,
digest,
newpath, pathlen);
dent = brick_zmem_alloc(cookie->allocsize);
dent->d_class = class;
@ -1501,7 +1507,7 @@ int mars_filler(void *__buf, const char *name, int namlen, loff_t offset,
dent->d_path = newpath;
newpath = NULL;
hash = (class + serial + d_type + pathlen * 7 + namlen * 13) % MARS_GLOBAL_HASH;
hash = *(unsigned long *)&digest % MARS_GLOBAL_HASH;
dent->d_hash = hash;
dent->d_name = brick_string_alloc(namlen + 1);
memcpy(dent->d_name, name, namlen);