X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=filehash.c;h=b55ab7340e68065de4bcb6eb6e8f39111d38886e;hp=a00ac7885721c60b839f0b6c26144f6355b065a9;hb=01fe773df4bc4a35450ce3ef50c8075b3bf55cd0;hpb=01743ee1718e7ec4b16ae3e53c8f64900c6052cc

diff --git a/filehash.c b/filehash.c
index a00ac788..b55ab734 100644
--- a/filehash.c
+++ b/filehash.c
@@ -3,32 +3,50 @@
 
 #include "fio.h"
 #include "flist.h"
-#include "crc/crc16.h"
+#include "hash.h"
+#include "filehash.h"
+#include "smalloc.h"
+#include "lib/bloom.h"
 
 #define HASH_BUCKETS	512
 #define HASH_MASK	(HASH_BUCKETS - 1)
 
-unsigned int file_hash_size = HASH_BUCKETS * sizeof(struct flist_head);
+#define BLOOM_SIZE	16*1024*1024
+
+static unsigned int file_hash_size = HASH_BUCKETS * sizeof(struct flist_head);
 
 static struct flist_head *file_hash;
-static struct fio_mutex *hash_lock;
+static struct fio_sem *hash_lock;
+static struct bloom *file_bloom;
 
 static unsigned short hash(const char *name)
 {
-	return crc16((const unsigned char *) name, strlen(name)) & HASH_MASK;
+	return jhash(name, strlen(name), 0) & HASH_MASK;
+}
+
+void fio_file_hash_lock(void)
+{
+	if (hash_lock)
+		fio_sem_down(hash_lock);
+}
+
+void fio_file_hash_unlock(void)
+{
+	if (hash_lock)
+		fio_sem_up(hash_lock);
 }
 
 void remove_file_hash(struct fio_file *f)
 {
-	fio_mutex_down(hash_lock);
+	fio_sem_down(hash_lock);
 
-	if (f->flags & FIO_FILE_HASHED) {
+	if (fio_file_hashed(f)) {
 		assert(!flist_empty(&f->hash_list));
 		flist_del_init(&f->hash_list);
-		f->flags &= ~FIO_FILE_HASHED;
+		fio_file_clear_hashed(f);
 	}
 
-	fio_mutex_up(hash_lock);
+	fio_sem_up(hash_lock);
 }
 
 static struct fio_file *__lookup_file_hash(const char *name)
@@ -39,6 +57,9 @@ static struct fio_file *__lookup_file_hash(const char *name)
 	flist_for_each(n, bucket) {
 		struct fio_file *f = flist_entry(n, struct fio_file, hash_list);
 
+		if (!f->file_name)
+			continue;
+
 		if (!strcmp(f->file_name, name)) {
 			assert(f->fd != -1);
 			return f;
@@ -52,9 +73,9 @@ struct fio_file *lookup_file_hash(const char *name)
 {
 	struct fio_file *f;
 
-	fio_mutex_down(hash_lock);
+	fio_sem_down(hash_lock);
 	f = __lookup_file_hash(name);
-	fio_mutex_up(hash_lock);
+	fio_sem_up(hash_lock);
 	return f;
 }
 
@@ -62,47 +83,57 @@ struct fio_file *add_file_hash(struct fio_file *f)
 {
 	struct fio_file *alias;
 
-	if (f->flags & FIO_FILE_HASHED)
+	if (fio_file_hashed(f))
 		return NULL;
 
 	INIT_FLIST_HEAD(&f->hash_list);
 
-	fio_mutex_down(hash_lock);
+	fio_sem_down(hash_lock);
 
 	alias = __lookup_file_hash(f->file_name);
 	if (!alias) {
-		f->flags |= FIO_FILE_HASHED;
+		fio_file_set_hashed(f);
 		flist_add_tail(&f->hash_list, &file_hash[hash(f->file_name)]);
 	}
 
-	fio_mutex_up(hash_lock);
+	fio_sem_up(hash_lock);
 	return alias;
 }
 
+bool file_bloom_exists(const char *fname, bool set)
+{
+	return bloom_string(file_bloom, fname, strlen(fname), set);
+}
+
 void file_hash_exit(void)
 {
 	unsigned int i, has_entries = 0;
 
-	fio_mutex_down(hash_lock);
+	fio_sem_down(hash_lock);
 	for (i = 0; i < HASH_BUCKETS; i++)
 		has_entries += !flist_empty(&file_hash[i]);
-	fio_mutex_up(hash_lock);
+	fio_sem_up(hash_lock);
 
 	if (has_entries)
 		log_err("fio: file hash not empty on exit\n");
 
+	sfree(file_hash);
 	file_hash = NULL;
-	fio_mutex_remove(hash_lock);
+	fio_sem_remove(hash_lock);
 	hash_lock = NULL;
+	bloom_free(file_bloom);
+	file_bloom = NULL;
 }
 
-void file_hash_init(void *ptr)
+void file_hash_init(void)
 {
 	unsigned int i;
 
-	file_hash = ptr;
+	file_hash = smalloc(file_hash_size);
+
 	for (i = 0; i < HASH_BUCKETS; i++)
 		INIT_FLIST_HEAD(&file_hash[i]);
 
-	hash_lock = fio_mutex_init(1);
+	hash_lock = fio_sem_init(FIO_SEM_UNLOCKED);
+	file_bloom = bloom_new(BLOOM_SIZE);
 }