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Major rework of memory allocation using fixed mem pools

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This commit is contained in:
Antonio SJ Musumeci 2021-08-30 07:59:21 -04:00
parent b165332486
commit 6b5c484fbf
12 changed files with 1828 additions and 413 deletions
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2
libfuse/Makefile
View File

@ -32,6 +32,7 @@ INSTALLMAN1DIR = $(DESTDIR)$(MAN1DIR)
AR ?= ar
SRC = \
lib/fuse_node.c \
lib/buffer.c \
lib/fuse_dirents.c \
lib/fuse.c \
@ -50,6 +51,7 @@ CFLAGS ?= \
$(OPT_FLAGS)
CFLAGS := \
${CFLAGS} \
-std=gnu99 \
-Wall \
-pipe \
-MMD

20
libfuse/include/fuse.h
View File

@ -689,22 +689,8 @@ int fuse_is_lib_option(const char *opt);
*/
int fuse_main_real(int argc, char *argv[], const struct fuse_operations *op, size_t op_size);
/**
* Start the cleanup thread when using option "remember".
*
* This is done automatically by fuse_loop_mt()
* @param fuse struct fuse pointer for fuse instance
* @return 0 on success and -1 on error
*/
int fuse_start_cleanup_thread(struct fuse *fuse);
/**
* Stop the cleanup thread when using option "remember".
*
* This is done automatically by fuse_loop_mt()
* @param fuse struct fuse pointer for fuse instance
*/
void fuse_stop_cleanup_thread(struct fuse *fuse);
int fuse_start_maintenance_thread(struct fuse *fuse);
void fuse_stop_maintenance_thread(struct fuse *fuse);
/**
* Iterate over cache removing stale entries
@ -765,8 +751,6 @@ int fuse_fs_release(struct fuse_fs *fs,
fuse_file_info_t *fi);
int fuse_fs_open(struct fuse_fs *fs, const char *path,
fuse_file_info_t *fi);
int fuse_fs_read(struct fuse_fs *fs, char *buf, size_t size,
off_t off, fuse_file_info_t *fi);
int fuse_fs_read_buf(struct fuse_fs *fs,
struct fuse_bufvec **bufp, size_t size, off_t off,
fuse_file_info_t *fi);

356
libfuse/lib/fmp.h Normal file
View File

@ -0,0 +1,356 @@
/*
ISC License
Copyright (c) 2021, Antonio SJ Musumeci <trapexit@spawn.link>
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#pragma once
#include "kvec.h"
#include <errno.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <unistd.h>
#define ROUND_UP(N,S) ((((N) + (S) - 1) / (S)) * (S))
typedef kvec_t(void*) slab_kvec_t;
typedef struct mem_stack_t mem_stack_t;
struct mem_stack_t
{
mem_stack_t *next;
};
typedef struct fmp_t fmp_t;
struct fmp_t
{
mem_stack_t *objs;
slab_kvec_t slabs;
uint64_t avail_objs;
uint64_t obj_size;
uint64_t page_size;
uint64_t slab_size;
};
static
inline
uint64_t
fmp_page_size()
{
return sysconf(_SC_PAGESIZE);
}
static
inline
void
fmp_init(fmp_t *fmp_,
const uint64_t obj_size_,
const uint64_t page_multiple_)
{
kv_init(fmp_->slabs);
fmp_->objs = NULL;
fmp_->avail_objs = 0;
fmp_->obj_size = ROUND_UP(obj_size_,sizeof(void*));
fmp_->page_size = fmp_page_size();
fmp_->slab_size = (fmp_->page_size * page_multiple_);
}
static
inline
uint64_t
fmp_slab_count(fmp_t *fmp_)
{
return kv_size(fmp_->slabs);
}
static
inline
void*
fmp_slab_alloc_posix_memalign(fmp_t *fmp_)
{
int rv;
void *mem;
const size_t alignment = fmp_->page_size;
const size_t size = fmp_->slab_size;
rv = posix_memalign(&mem,alignment,size);
if(rv != 0)
return NULL;
return NULL;
}
static
inline
void*
fmp_slab_alloc_mmap(fmp_t *fmp_)
{
void *mem;
void *address = NULL;
const size_t length = fmp_->slab_size;
const int protect = PROT_READ|PROT_WRITE;
const int flags = MAP_PRIVATE|MAP_ANONYMOUS;
const int filedes = -1;
const off_t offset = 0;
mem = mmap(address,length,protect,flags,filedes,offset);
if(mem == MAP_FAILED)
return NULL;
return mem;
}
static
inline
void
fmp_slab_free_posix_memalign(fmp_t* fmp_,
void *mem_)
{
(void)fmp_;
free(mem_);
}
static
inline
void
fmp_slab_free_mmap(fmp_t* fmp_,
void *mem_)
{
void *addr = mem_;
size_t length = fmp_->slab_size;
(void)munmap(addr,length);
}
static
inline
int
fmp_slab_alloc(fmp_t *fmp_)
{
char *i;
void *mem;
mem = fmp_slab_alloc_mmap(fmp_);
if(mem == NULL)
return -ENOMEM;
kv_push(void*,fmp_->slabs,mem);
i = ((char*)mem + fmp_->slab_size - fmp_->obj_size);
while(i >= (char*)mem)
{
mem_stack_t *obj = (mem_stack_t*)i;
obj->next = fmp_->objs;
fmp_->objs = obj;
fmp_->avail_objs++;
i -= fmp_->obj_size;
}
return 0;
}
static
inline
void*
fmp_alloc(fmp_t *fmp_)
{
void *rv;
if(fmp_->objs == NULL)
fmp_slab_alloc(fmp_);
if(fmp_->objs == NULL)
return NULL;
rv = fmp_->objs;
fmp_->objs = fmp_->objs->next;
fmp_->avail_objs--;
return rv;
}
static
inline
void*
fmp_calloc(fmp_t *fmp_)
{
void *obj;
obj = fmp_alloc(fmp_);
if(obj == NULL)
return NULL;
memset(obj,0,fmp_->obj_size);
return obj;
}
static
inline
void
fmp_free(fmp_t *fmp_,
void *obj_)
{
mem_stack_t *obj = (mem_stack_t*)obj_;
obj->next = fmp_->objs;
fmp_->objs = obj;
fmp_->avail_objs++;
}
static
inline
void
fmp_clear(fmp_t *fmp_)
{
while(kv_size(fmp_->slabs))
{
void *slab = kv_pop(fmp_->slabs);
fmp_slab_free_mmap(fmp_,slab);
}
fmp_->objs = NULL;
fmp_->avail_objs = 0;
}
static
inline
void
fmp_destroy(fmp_t *fmp_)
{
fmp_clear(fmp_);
kv_destroy(fmp_->slabs);
}
static
inline
uint64_t
fmp_avail_objs(fmp_t *fmp_)
{
return fmp_->avail_objs;
}
static
inline
uint64_t
fmp_objs_in_slab(fmp_t *fmp_,
void *slab_)
{
char *slab;
uint64_t objs_in_slab;
objs_in_slab = 0;
slab = (char*)slab_;
for(mem_stack_t *stack = fmp_->objs; stack != NULL; stack = stack->next)
{
char *obj = (char*)stack;
if((obj >= slab) && (obj < (slab + fmp_->slab_size)))
objs_in_slab++;
}
return objs_in_slab;
}
static
inline
void
fmp_remove_objs_in_slab(fmp_t *fmp_,
void *slab_)
{
char *slab = (char*)slab_;
mem_stack_t **p = &fmp_->objs;
while((*p) != NULL)
{
char *obj = (char*)*p;
if((obj >= slab) && (obj < (slab + fmp_->slab_size)))
{
*p = (*p)->next;
fmp_->avail_objs--;
continue;
}
p = &(*p)->next;
}
}
static
inline
int
fmp_gc(fmp_t *fmp_)
{
int i;
int freed_slabs;
uint64_t objs_per_slab;
objs_per_slab = (fmp_->slab_size / fmp_->obj_size);
i = 0;
freed_slabs = 0;
while(i < kv_size(fmp_->slabs))
{
char *slab;
uint64_t objs_in_slab;
slab = kv_A(fmp_->slabs,i);
objs_in_slab = fmp_objs_in_slab(fmp_,slab);
if(objs_in_slab != objs_per_slab)
{
i++;
continue;
}
fmp_remove_objs_in_slab(fmp_,slab);
kv_delete(fmp_->slabs,i);
fmp_slab_free_mmap(fmp_,slab);
freed_slabs++;
}
return freed_slabs;
}
static
inline
uint64_t
fmp_objs_per_slab(fmp_t *fmp_)
{
return (fmp_->slab_size / fmp_->obj_size);
}
static
inline
double
fmp_slab_usage_ratio(fmp_t *fmp_)
{
double rv;
uint64_t objs_per_slab;
objs_per_slab = fmp_objs_per_slab(fmp_);
rv = ((double)fmp_->avail_objs / (double)objs_per_slab);
return rv;
}

568
libfuse/lib/fuse.c
View File

@ -9,6 +9,10 @@
/* For pthread_rwlock_t */
#define _GNU_SOURCE
#include "fuse_node.h"
#include "lfmp.h"
#include "kvec.h"
#include "config.h"
#include "fuse_i.h"
#include "fuse_lowlevel.h"
@ -38,10 +42,8 @@
#include <time.h>
#include <unistd.h>
#define FUSE_NODE_SLAB 1
#ifndef MAP_ANONYMOUS
#undef FUSE_NODE_SLAB
#ifdef HAVE_MALLOC_TRIM
#include <malloc.h>
#endif
#define FUSE_UNKNOWN_INO UINT64_MAX
@ -108,11 +110,11 @@ struct list_head
struct list_head *prev;
};
struct node_slab
typedef struct remembered_node_t remembered_node_t;
struct remembered_node_t
{
struct list_head list; /* must be the first member */
struct list_head freelist;
int used;
struct node *node;
time_t time;
};
struct fuse
@ -120,7 +122,6 @@ struct fuse
struct fuse_session *se;
struct node_table name_table;
struct node_table id_table;
struct list_head lru_table;
fuse_ino_t ctr;
uint64_t generation;
unsigned int hidectr;
@ -128,10 +129,10 @@ struct fuse
struct fuse_config conf;
struct fuse_fs *fs;
struct lock_queue_element *lockq;
int pagesize;
struct list_head partial_slabs;
struct list_head full_slabs;
pthread_t prune_thread;
pthread_t maintenance_thread;
lfmp_t node_fmp;
kvec_t(remembered_node_t) remembered_nodes;
};
struct lock
@ -166,16 +167,10 @@ struct node
char inline_name[32];
};
#define TREELOCK_WRITE -1
#define TREELOCK_WAIT_OFFSET INT_MIN
struct node_lru
{
struct node node;
struct list_head lru;
struct timespec forget_time;
};
struct fuse_dh
{
pthread_mutex_t lock;
@ -193,21 +188,6 @@ static pthread_key_t fuse_context_key;
static pthread_mutex_t fuse_context_lock = PTHREAD_MUTEX_INITIALIZER;
static int fuse_context_ref;
static
void
init_list_head(struct list_head *list)
{
list->next = list;
list->prev = list;
}
static
int
list_empty(const struct list_head *head)
{
return head->next == head;
}
static
void
list_add(struct list_head *new,
@ -250,121 +230,11 @@ list_del(struct list_head *entry)
prev->next = next;
}
static
inline
int
lru_enabled(struct fuse *f)
{
return f->conf.remember > 0;
}
static
struct
node_lru*
node_lru(struct node *node)
{
return (struct node_lru*)node;
}
static
size_t
get_node_size(struct fuse *f)
{
if(lru_enabled(f))
return sizeof(struct node_lru);
else
return sizeof(struct node);
}
#ifdef FUSE_NODE_SLAB
static
struct node_slab*
list_to_slab(struct list_head *head)
{
return (struct node_slab *)head;
}
static
struct node_slab*
node_to_slab(struct fuse *f,
struct node *node)
{
return (struct node_slab *)(((uintptr_t)node) & ~((uintptr_t)f->pagesize - 1));
}
static
int
alloc_slab(struct fuse *f)
{
void *mem;
struct node_slab *slab;
char *start;
size_t num;
size_t i;
size_t node_size = get_node_size(f);
mem = mmap(NULL,f->pagesize,PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS,-1,0);
if(mem == MAP_FAILED)
return -1;
slab = mem;
init_list_head(&slab->freelist);
slab->used = 0;
num = (f->pagesize - sizeof(struct node_slab)) / node_size;
start = (char *)mem + f->pagesize - num * node_size;
for(i = 0; i < num; i++)
{
struct list_head *n;
n = (struct list_head *)(start + i * node_size);
list_add_tail(n,&slab->freelist);
}
list_add_tail(&slab->list,&f->partial_slabs);
return 0;
}
static
struct node*
alloc_node(struct fuse *f)
{
struct node_slab *slab;
struct list_head *node;
if(list_empty(&f->partial_slabs))
{
int res = alloc_slab(f);
if(res != 0)
return NULL;
}
slab = list_to_slab(f->partial_slabs.next);
slab->used++;
node = slab->freelist.next;
list_del(node);
if(list_empty(&slab->freelist))
{
list_del(&slab->list);
list_add_tail(&slab->list,&f->full_slabs);
}
memset(node,0,sizeof(struct node));
return (struct node *)node;
}
static
void
free_slab(struct fuse *f,
struct node_slab *slab)
{
int res;
list_del(&slab->list);
res = munmap(slab,f->pagesize);
if(res == -1)
fprintf(stderr,"fuse warning: munmap(%p) failed\n",slab);
return lfmp_calloc(&f->node_fmp);
}
static
@ -372,41 +242,8 @@ void
free_node_mem(struct fuse *f,
struct node *node)
{
struct node_slab *slab = node_to_slab(f,node);
struct list_head *n = (struct list_head *)node;
slab->used--;
if(slab->used)
{
if(list_empty(&slab->freelist))
{
list_del(&slab->list);
list_add_tail(&slab->list,&f->partial_slabs);
}
list_add_head(n,&slab->freelist);
}
else
{
free_slab(f,slab);
}
return lfmp_free(&f->node_fmp,node);
}
#else
static
struct node*
alloc_node(struct fuse *f)
{
return (struct node *)calloc(1,get_node_size(f));
}
static
void
free_node_mem(struct fuse *f,
struct node *node)
{
(void)f;
free(node);
}
#endif
static
size_t
@ -454,29 +291,44 @@ get_node(struct fuse *f,
return node;
}
static void curr_time(struct timespec *now);
static double diff_timespec(const struct timespec *t1,
const struct timespec *t2);
static
void
remove_node_lru(struct node *node)
remove_remembered_node(struct fuse *f_,
struct node *node_)
{
struct node_lru *lnode = node_lru(node);
list_del(&lnode->lru);
init_list_head(&lnode->lru);
for(size_t i = 0; i < kv_size(f_->remembered_nodes); i++)
{
if(kv_A(f_->remembered_nodes,i).node != node_)
continue;
kv_delete(f_->remembered_nodes,i);
break;
}
}
static
void
set_forget_time(struct fuse *f,
struct node *node)
{
struct node_lru *lnode = node_lru(node);
#ifndef CLOCK_MONOTONIC
# define CLOCK_MONOTONIC CLOCK_REALTIME
#endif
list_del(&lnode->lru);
list_add_tail(&lnode->lru,&f->lru_table);
curr_time(&lnode->forget_time);
static
time_t
current_time()
{
int rv;
struct timespec now;
static clockid_t clockid = CLOCK_MONOTONIC;
rv = clock_gettime(clockid,&now);
if((rv == -1) && (errno == EINVAL))
{
clockid = CLOCK_REALTIME;
rv = clock_gettime(clockid,&now);
}
if(rv == -1)
now.tv_sec = time(NULL);
return now.tv_sec;
}
static
@ -777,7 +629,7 @@ hash_name(struct fuse *f,
return -1;
}
parent->refctr ++;
parent->refctr++;
node->parent = parent;
node->name_next = f->name_table.array[hash];
f->name_table.array[hash] = node;
@ -789,6 +641,14 @@ hash_name(struct fuse *f,
return 0;
}
static
inline
int
remember_nodes(struct fuse *f_)
{
return (f_->conf.remember > 0);
}
static
void
delete_node(struct fuse *f,
@ -796,8 +656,8 @@ delete_node(struct fuse *f,
{
assert(node->treelock == 0);
unhash_name(f,node);
if(lru_enabled(f))
remove_node_lru(node);
if(remember_nodes(f))
remove_remembered_node(f,node);
unhash_id(f,node);
free_node(f,node);
}
@ -881,6 +741,7 @@ find_node(struct fuse *f,
node = get_node(f,parent);
else
node = lookup_node(f,parent,name);
if(node == NULL)
{
node = alloc_node(f);
@ -899,15 +760,10 @@ find_node(struct fuse *f,
goto out_err;
}
hash_id(f,node);
if(lru_enabled(f))
{
struct node_lru *lnode = node_lru(node);
init_list_head(&lnode->lru);
}
}
else if(lru_enabled(f) && node->nlookup == 1)
else if((node->nlookup == 1) && remember_nodes(f))
{
remove_node_lru(node);
remove_remembered_node(f,node);
}
inc_nlookup(node);
out_err:
@ -1420,10 +1276,20 @@ forget_node(struct fuse *f,
assert(node->nlookup >= nlookup);
node->nlookup -= nlookup;
if(!node->nlookup)
if(node->nlookup == 0)
{
unref_node(f,node);
else if(lru_enabled(f) && node->nlookup == 1)
set_forget_time(f,node);
}
else if((node->nlookup == 1) && remember_nodes(f))
{
remembered_node_t fn;
fn.node = node;
fn.time = current_time();
kv_push(remembered_node_t,f->remembered_nodes,fn);
}
pthread_mutex_unlock(&f->lock);
}
@ -1433,11 +1299,8 @@ void
unlink_node(struct fuse *f,
struct node *node)
{
if(f->conf.remember)
{
assert(node->nlookup > 1);
node->nlookup--;
}
unhash_name(f,node);
}
@ -1640,29 +1503,6 @@ fuse_fs_read_buf(struct fuse_fs *fs,
return 0;
}
int
fuse_fs_read(struct fuse_fs *fs,
char *mem,
size_t size,
off_t off,
fuse_file_info_t *fi)
{
int res;
struct fuse_bufvec *buf = NULL;
res = fuse_fs_read_buf(fs,&buf,size,off,fi);
if(res == 0)
{
struct fuse_bufvec dst = FUSE_BUFVEC_INIT(size);
dst.buf[0].mem = mem;
res = fuse_buf_copy(&dst,buf,0);
}
fuse_free_buf(buf);
return res;
}
int
fuse_fs_write_buf(struct fuse_fs *fs,
struct fuse_bufvec *buf,
@ -1938,29 +1778,6 @@ node_open(const struct node *node_)
return ((node_ != NULL) && (node_->open_count > 0));
}
#ifndef CLOCK_MONOTONIC
#define CLOCK_MONOTONIC CLOCK_REALTIME
#endif
static
void
curr_time(struct timespec *now)
{
static clockid_t clockid = CLOCK_MONOTONIC;
int res = clock_gettime(clockid,now);
if(res == -1 && errno == EINVAL)
{
clockid = CLOCK_REALTIME;
res = clock_gettime(clockid,now);
}
if(res == -1)
{
perror("fuse: clock_gettime");
abort();
}
}
static
void
update_stat(struct node *node_,
@ -2195,13 +2012,10 @@ fuse_lib_lookup(fuse_req_t req,
if(name[0] == '.')
{
int len = strlen(name);
if(len == 1 || (name[1] == '.' && len == 2))
if(name[1] == '\0')
{
name = NULL;
pthread_mutex_lock(&f->lock);
if(len == 1)
{
dot = get_node_nocheck(f,parent);
if(dot == NULL)
{
@ -2210,13 +2024,14 @@ fuse_lib_lookup(fuse_req_t req,
return;
}
dot->refctr++;
}
else
{
parent = get_node(f,parent)->parent->nodeid;
}
pthread_mutex_unlock(&f->lock);
}
else if((name[1] == '.') && (name[2] == '\0'))
{
name = NULL;
pthread_mutex_lock(&f->lock);
parent = get_node(f,parent)->parent->nodeid;
pthread_mutex_unlock(&f->lock);
}
}
@ -2231,12 +2046,14 @@ fuse_lib_lookup(fuse_req_t req,
}
free_path(f,parent,path);
}
if(dot)
{
pthread_mutex_lock(&f->lock);
unref_node(f,dot);
pthread_mutex_unlock(&f->lock);
}
reply_entry(req,&e,err);
}
@ -2820,15 +2637,6 @@ fuse_lib_create(fuse_req_t req,
free_path(f,parent,path);
}
static
double
diff_timespec(const struct timespec *t1,
const struct timespec *t2)
{
return (t1->tv_sec - t2->tv_sec) +
((double)t1->tv_nsec - (double)t2->tv_nsec) / 1000000000.0;
}
static
void
open_auto_cache(struct fuse *f,
@ -3795,61 +3603,115 @@ fuse_lib_fallocate(fuse_req_t req,
static
int
clean_delay(struct fuse *f)
remembered_node_cmp(const void *a_,
const void *b_)
{
/*
* This is calculating the delay between clean runs. To
* reduce the number of cleans we are doing them 10 times
* within the remember window.
*/
int min_sleep = 60;
int max_sleep = 3600;
int sleep_time = f->conf.remember / 10;
const remembered_node_t *a = a_;
const remembered_node_t *b = b_;
if(sleep_time > max_sleep)
return max_sleep;
if(sleep_time < min_sleep)
return min_sleep;
return sleep_time;
return (a->time - b->time);
}
int
fuse_clean_cache(struct fuse *f)
static
void
remembered_nodes_sort(struct fuse *f_)
{
struct node_lru *lnode;
struct list_head *curr,*next;
struct node *node;
struct timespec now;
pthread_mutex_lock(&f_->lock);
qsort(&kv_first(f_->remembered_nodes),
kv_size(f_->remembered_nodes),
sizeof(remembered_node_t),
remembered_node_cmp);
pthread_mutex_unlock(&f_->lock);
}
pthread_mutex_lock(&f->lock);
#define MAX_PRUNE 100
#define MAX_CHECK 1000
curr_time(&now);
int
fuse_prune_some_remembered_nodes(struct fuse *f_,
int *offset_)
{
time_t now;
int pruned;
int checked;
for(curr = f->lru_table.next; curr != &f->lru_table; curr = next)
pthread_mutex_lock(&f_->lock);
pruned = 0;
checked = 0;
now = current_time();
while(*offset_ < kv_size(f_->remembered_nodes))
{
double age;
time_t age;
remembered_node_t *fn = &kv_A(f_->remembered_nodes,*offset_);
next = curr->next;
lnode = list_entry(curr,struct node_lru,lru);
node = &lnode->node;
age = diff_timespec(&now,&lnode->forget_time);
if(age <= f->conf.remember)
if(pruned >= MAX_PRUNE)
break;
if(checked >= MAX_CHECK)
break;
assert(node->nlookup == 1);
checked++;
age = (now - fn->time);
if(f_->conf.remember > age)
break;
assert(fn->node->nlookup == 1);
/* Don't forget active directories */
if(node->refctr > 1)
if(fn->node->refctr > 1)
{
(*offset_)++;
continue;
node->nlookup = 0;
unhash_name(f,node);
unref_node(f,node);
}
pthread_mutex_unlock(&f->lock);
return clean_delay(f);
fn->node->nlookup = 0;
unref_node(f_,fn->node);
kv_delete(f_->remembered_nodes,*offset_);
pruned++;
}
pthread_mutex_unlock(&f_->lock);
if((pruned < MAX_PRUNE) && (checked < MAX_CHECK))
*offset_ = -1;
return pruned;
}
#undef MAX_PRUNE
#undef MAX_CHECK
static
void
sleep_100ms(void)
{
const struct timespec ms100 = {0,100 * 1000000};
nanosleep(&ms100,NULL);
}
void
fuse_prune_remembered_nodes(struct fuse *f_)
{
int offset;
int pruned;
offset = 0;
pruned = 0;
for(;;)
{
pruned += fuse_prune_some_remembered_nodes(f_,&offset);
if(offset >= 0)
{
sleep_100ms();
continue;
}
break;
}
if(pruned > 0)
remembered_nodes_sort(f_);
}
static struct fuse_lowlevel_ops fuse_path_ops =
@ -3937,6 +3799,7 @@ struct fuse_cmd*
fuse_alloc_cmd(size_t bufsize)
{
struct fuse_cmd *cmd = (struct fuse_cmd *)malloc(sizeof(*cmd));
if(cmd == NULL)
{
fprintf(stderr,"fuse: failed to allocate cmd\n");
@ -4099,39 +3962,57 @@ node_table_init(struct node_table *t)
}
static
void*
fuse_prune_nodes(void *fuse)
void
fuse_malloc_trim(void)
{
struct fuse *f = fuse;
int sleep_time;
#ifdef HAVE_MALLOC_TRIM
malloc_trim(1024 * 1024);
#endif
}
static
void*
fuse_maintenance_loop(void *fuse_)
{
int loops;
int sleep_time;
double slab_usage_ratio;
struct fuse *f = (struct fuse*)fuse_;
loops = 0;
sleep_time = 60;
while(1)
{
sleep_time = fuse_clean_cache(f);
if(remember_nodes(f))
fuse_prune_remembered_nodes(f);
slab_usage_ratio = lfmp_slab_usage_ratio(&f->node_fmp);
if(slab_usage_ratio > 3.0)
lfmp_gc(&f->node_fmp);
if(loops % 15)
fuse_malloc_trim();
loops++;
sleep(sleep_time);
}
return NULL;
}
int
fuse_start_cleanup_thread(struct fuse *f)
fuse_start_maintenance_thread(struct fuse *f_)
{
if(lru_enabled(f))
return fuse_start_thread(&f->prune_thread,fuse_prune_nodes,f);
return 0;
return fuse_start_thread(&f_->maintenance_thread,fuse_maintenance_loop,f_);
}
void
fuse_stop_cleanup_thread(struct fuse *f)
fuse_stop_maintenance_thread(struct fuse *f_)
{
if(lru_enabled(f))
{
pthread_mutex_lock(&f->lock);
pthread_cancel(f->prune_thread);
pthread_mutex_unlock(&f->lock);
pthread_join(f->prune_thread,NULL);
}
pthread_mutex_lock(&f_->lock);
pthread_cancel(f_->maintenance_thread);
pthread_mutex_unlock(&f_->lock);
pthread_join(f_->maintenance_thread,NULL);
}
struct fuse*
@ -4168,11 +4049,6 @@ fuse_new_common(struct fuse_chan *ch,
llop.setlk = NULL;
}
f->pagesize = getpagesize();
init_list_head(&f->partial_slabs);
init_list_head(&f->full_slabs);
init_list_head(&f->lru_table);
if(fuse_opt_parse(args,&f->conf,fuse_lib_opts,fuse_lib_opt_proc) == -1)
goto out_free_fs;
@ -4194,6 +4070,9 @@ fuse_new_common(struct fuse_chan *ch,
fuse_mutex_init(&f->lock);
lfmp_init(&f->node_fmp,sizeof(struct node),256);
kv_init(f->remembered_nodes);
root = alloc_node(f);
if(root == NULL)
{
@ -4201,12 +4080,6 @@ fuse_new_common(struct fuse_chan *ch,
goto out_free_id_table;
}
if(lru_enabled(f))
{
struct node_lru *lnode = node_lru(root);
init_list_head(&lnode->lru);
}
strcpy(root->inline_name,"/");
root->name = root->inline_name;
@ -4282,13 +4155,12 @@ fuse_destroy(struct fuse *f)
}
}
assert(list_empty(&f->partial_slabs));
assert(list_empty(&f->full_slabs));
free(f->id_table.array);
free(f->name_table.array);
pthread_mutex_destroy(&f->lock);
fuse_session_destroy(f->se);
lfmp_destroy(&f->node_fmp);
kv_destroy(f->remembered_nodes);
free(f);
fuse_delete_context_key();
}

20
libfuse/lib/fuse_dirents.c
View File

@ -19,6 +19,14 @@
/* 32KB - same as glibc getdents buffer size */
#define DEFAULT_SIZE (1024 * 32)
static
uint64_t
round_up(const uint64_t number_,
const uint64_t multiple_)
{
return (((number_ + multiple_ - 1) / multiple_) * multiple_);
}
static
uint64_t
align_uint64_t(uint64_t v_)
@ -57,16 +65,20 @@ int
fuse_dirents_buf_resize(fuse_dirents_t *d_,
uint64_t size_)
{
void *p;
char *p;
if((d_->data_len + size_) >= d_->buf_len)
{
p = realloc(d_->buf,(d_->buf_len * 2));
uint64_t new_size;
new_size = round_up((d_->data_len + size_),DEFAULT_SIZE);
p = realloc(d_->buf,new_size);
memset(&p[d_->data_len],0,new_size - d_->data_len);
if(p == NULL)
return -errno;
d_->buf = p;
d_->buf_len *= 2;
d_->buf_len = new_size;
}
return 0;
@ -381,7 +393,7 @@ fuse_dirents_init(fuse_dirents_t *d_)
{
void *buf;
buf = calloc(DEFAULT_SIZE,1);
buf = calloc(1,DEFAULT_SIZE);
if(buf == NULL)
return -ENOMEM;

47
libfuse/lib/fuse_lowlevel.c
View File

@ -8,6 +8,8 @@
#define _GNU_SOURCE
#include "lfmp.h"
#include "config.h"
#include "fuse_i.h"
#include "fuse_kernel.h"
@ -47,12 +49,26 @@ struct fuse_pollhandle_t
};
static size_t pagesize;
static lfmp_t g_FMP_fuse_req;
static __attribute__((constructor)) void fuse_ll_init_pagesize(void)
static
__attribute__((constructor))
void
fuse_ll_constructor(void)
{
pagesize = getpagesize();
lfmp_init(&g_FMP_fuse_req,sizeof(struct fuse_req),1);
}
static
__attribute__((destructor))
void
fuse_ll_destructor(void)
{
lfmp_destroy(&g_FMP_fuse_req);
}
static
void
convert_stat(const struct stat *stbuf_,
@ -109,7 +125,7 @@ static
void
destroy_req(fuse_req_t req)
{
free(req);
lfmp_free(&g_FMP_fuse_req,req);
}
static
@ -118,7 +134,7 @@ fuse_ll_alloc_req(struct fuse_ll *f)
{
struct fuse_req *req;
req = (struct fuse_req *) calloc(1, sizeof(struct fuse_req));
req = (struct fuse_req*)lfmp_calloc(&g_FMP_fuse_req);
if (req == NULL)
{
fprintf(stderr, "fuse: failed to allocate request\n");
@ -203,27 +219,6 @@ send_reply(fuse_req_t req,
return send_reply_iov(req, error, iov, count);
}
int
fuse_reply_iov(fuse_req_t req,
const struct iovec *iov,
int count)
{
int res;
struct iovec *padded_iov;
padded_iov = malloc((count + 1) * sizeof(struct iovec));
if (padded_iov == NULL)
return fuse_reply_err(req, ENOMEM);
memcpy(padded_iov + 1, iov, count * sizeof(struct iovec));
count++;
res = send_reply_iov(req, 0, padded_iov, count);
free(padded_iov);
return res;
}
static
void
convert_statfs(const struct statvfs *stbuf,
@ -1635,9 +1630,7 @@ do_interrupt(fuse_req_t req,
fuse_ino_t nodeid,
const void *inarg)
{
pthread_mutex_lock(&req->f->lock);
destroy_req(req);
pthread_mutex_unlock(&req->f->lock);
}
static
@ -2631,6 +2624,8 @@ fuse_ll_destroy(void *data)
pthread_key_delete(f->pipe_key);
pthread_mutex_destroy(&f->lock);
free(f);
lfmp_clear(&g_FMP_fuse_req);
}
static

6
libfuse/lib/fuse_mt.c
View File

@ -112,12 +112,14 @@ int fuse_loop_mt(struct fuse *f)
if (f == NULL)
return -1;
int res = fuse_start_cleanup_thread(f);
int res = fuse_start_maintenance_thread(f);
if (res)
return -1;
res = fuse_session_loop_mt(fuse_get_session(f),
fuse_config_num_threads(f));
fuse_stop_cleanup_thread(f);
fuse_stop_maintenance_thread(f);
return res;
}

224
libfuse/lib/fuse_node.c Normal file
View File

@ -0,0 +1,224 @@
#include "fuse_node.h"
#include "khash.h"
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <stdio.h> // for debugging
#define UNKNOWN_INO UINT64_MAX
#define ROOT_NODE_ID 0
#define ROOT_NODE_NAME "/"
typedef struct node_idname_t node_idname_t;
struct node_idname_t
{
uint64_t id;
const char *name;
};
static khint_t idname_hash_func(const node_idname_t idname);
static int idname_hash_equal(const node_idname_t idname0, const node_idname_t idname1);
KHASH_INIT(node,node_idname_t,fuse_node_t*,1,idname_hash_func,idname_hash_equal);
typedef struct fuse_node_hashtable_t fuse_node_hashtable_t;
struct fuse_node_hashtable_t
{
kh_node_t *ht;
uint64_t id;
uint64_t generation;
};
static
inline
khint_t
idname_hash_func(const node_idname_t idname_)
{
if(idname_.name == NULL)
return idname_.id;
return (idname_.id ^ kh_str_hash_func(idname_.name));
}
static
inline
int
idname_hash_equal(const node_idname_t idname0_,
const node_idname_t idname1_)
{
return ((idname0_.id == idname1_.id) &&
((idname0_.name == idname1_.name) ||
(strcmp(idname0_.name,idname1_.name) == 0)));
}
static
inline
fuse_node_t*
fuse_node_alloc(const uint64_t id_,
const char *name_)
{
fuse_node_t *node;
node = (fuse_node_t*)calloc(1,sizeof(fuse_node_t));
node->id = id_;
node->name = strdup(name_);
node->ref_count = 1;
node->lookup_count = 1;
return node;
}
static
inline
void
fuse_node_free(fuse_node_t *node_)
{
free(node_->name);
free(node_);
}
static
inline
uint64_t
rand64()
{
uint64_t rv;
rv = rand();
rv <<= 32;
rv |= rand();
return rv;
}
static
inline
void
node_hashtable_gen_unique_id(fuse_node_hashtable_t *ht_)
{
do
{
ht_->id++;
if(ht_->id == 0)
ht_->generation++;
}
while((ht_->id == 0) || (ht_->id == UNKNOWN_INO));
}
static
inline
void
node_hashtable_put_root(fuse_node_hashtable_t *ht_)
{
int rv;
khint_t k;
fuse_node_t *root_node;
const node_idname_t idname0 = {ROOT_NODE_ID,""};
const node_idname_t idname1 = {ROOT_NODE_ID,ROOT_NODE_NAME};
root_node = fuse_node_alloc(ROOT_NODE_ID,ROOT_NODE_NAME);
k = kh_put_node(ht_->ht,idname0,&rv);
kh_value(ht_->ht,k) = root_node;
k = kh_put_node(ht_->ht,idname1,&rv);
kh_value(ht_->ht,k) = root_node;
}
static
inline
void
node_hashtable_set_id_gen(fuse_node_hashtable_t *ht_,
fuse_node_t *node_)
{
node_hashtable_gen_unique_id(ht_);
node_->id = ht_->id;
node_->generation = ht_->generation;
}
fuse_node_hashtable_t*
fuse_node_hashtable_init()
{
fuse_node_hashtable_t *ht;
ht = (fuse_node_hashtable_t*)calloc(sizeof(fuse_node_hashtable_t),1);
if(ht == NULL)
return NULL;
ht->ht = kh_init_node();
if(ht->ht == NULL)
{
free(ht);
return NULL;
}
srand(time(NULL));
ht->id = 0;
ht->generation = rand64();
node_hashtable_put_root(ht);
return ht;
}
fuse_node_t*
fuse_node_hashtable_put(fuse_node_hashtable_t *ht_,
const uint64_t parent_id_,
const uint64_t child_id_,
const char *child_name_)
{
int rv;
khint_t k;
fuse_node_t *child_node;
const node_idname_t p_idname = {parent_id_,""};
const node_idname_t c0_idname = {child_id_,child_name_};
const node_idname_t c1_idname = {parent_id_,child_name_};
child_node = fuse_node_alloc(child_id_,child_name_);
k = kh_get_node(ht_->ht,p_idname);
child_node->parent = kh_value(ht_->ht,k);
child_node->parent->ref_count++;
k = kh_put_node(ht_->ht,c0_idname,&rv);
kh_value(ht_->ht,k) = child_node;
k = kh_put_node(ht_->ht,c1_idname,&rv);
kh_value(ht_->ht,k) = child_node;
return child_node;
}
fuse_node_t*
fuse_node_hashtable_get(fuse_node_hashtable_t *ht_,
const uint64_t id_)
{
return fuse_node_hashtable_get_child(ht_,id_,"");
}
fuse_node_t*
fuse_node_hashtable_get_child(fuse_node_hashtable_t *ht_,
const uint64_t parent_id_,
const char *child_name_)
{
khint_t k;
fuse_node_t *node;
const node_idname_t idname = {parent_id_,child_name_};
k = kh_get_node(ht_->ht,idname);
node = ((k != kh_end(ht_->ht)) ?
kh_value(ht_->ht,k) :
NULL);
return node;
}
void
fuse_node_hashtable_del(fuse_node_hashtable_t *ht_,
fuse_node_t *node_)
{
}

36
libfuse/lib/fuse_node.h Normal file
View File

@ -0,0 +1,36 @@
#include <stdint.h>
typedef struct fuse_node_t fuse_node_t;
struct fuse_node_t
{
uint64_t id;
uint64_t generation;
char *name;
fuse_node_t *parent;
uint32_t ref_count;
uint64_t lookup_count;
uint64_t open_count;
};
struct fuse_node_hashtable_t;
typedef struct fuse_node_hashtable_t fuse_node_hashtable_t;
fuse_node_hashtable_t *fuse_node_hashtable_init();
fuse_node_t *fuse_node_hashtable_put(fuse_node_hashtable_t *ht,
const uint64_t parent_id,
const uint64_t child_id,
const char *child_name);
fuse_node_t* fuse_node_hashtable_get(fuse_node_hashtable_t *ht,
const uint64_t id);
fuse_node_t* fuse_node_hashtable_get_child(fuse_node_hashtable_t *ht,
const uint64_t id,
const char *name);
void fuse_node_hashtable_del(fuse_node_hashtable_t *ht,
fuse_node_t *node);
void fuse_node_hashtable_get_path(fuse_node_hashtable_t *ht,
char *buf,
uint32_t buflen);

627
libfuse/lib/khash.h Normal file
View File

@ -0,0 +1,627 @@
/* The MIT License
Copyright (c) 2008, 2009, 2011 by Attractive Chaos <attractor@live.co.uk>
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
/*
An example:
#include "khash.h"
KHASH_MAP_INIT_INT(32, char)
int main() {
int ret, is_missing;
khiter_t k;
khash_t(32) *h = kh_init(32);
k = kh_put(32, h, 5, &ret);
kh_value(h, k) = 10;
k = kh_get(32, h, 10);
is_missing = (k == kh_end(h));
k = kh_get(32, h, 5);
kh_del(32, h, k);
for (k = kh_begin(h); k != kh_end(h); ++k)
if (kh_exist(h, k)) kh_value(h, k) = 1;
kh_destroy(32, h);
return 0;
}
*/
/*
2013-05-02 (0.2.8):
* Use quadratic probing. When the capacity is power of 2, stepping function
i*(i+1)/2 guarantees to traverse each bucket. It is better than double
hashing on cache performance and is more robust than linear probing.
In theory, double hashing should be more robust than quadratic probing.
However, my implementation is probably not for large hash tables, because
the second hash function is closely tied to the first hash function,
which reduce the effectiveness of double hashing.
Reference: http://research.cs.vt.edu/AVresearch/hashing/quadratic.php
2011-12-29 (0.2.7):
* Minor code clean up; no actual effect.
2011-09-16 (0.2.6):
* The capacity is a power of 2. This seems to dramatically improve the
speed for simple keys. Thank Zilong Tan for the suggestion. Reference:
- http://code.google.com/p/ulib/
- http://nothings.org/computer/judy/
* Allow to optionally use linear probing which usually has better
performance for random input. Double hashing is still the default as it
is more robust to certain non-random input.
* Added Wang's integer hash function (not used by default). This hash
function is more robust to certain non-random input.
2011-02-14 (0.2.5):
* Allow to declare global functions.
2009-09-26 (0.2.4):
* Improve portability
2008-09-19 (0.2.3):
* Corrected the example
* Improved interfaces
2008-09-11 (0.2.2):
* Improved speed a little in kh_put()
2008-09-10 (0.2.1):
* Added kh_clear()
* Fixed a compiling error
2008-09-02 (0.2.0):
* Changed to token concatenation which increases flexibility.
2008-08-31 (0.1.2):
* Fixed a bug in kh_get(), which has not been tested previously.
2008-08-31 (0.1.1):
* Added destructor
*/
#ifndef __AC_KHASH_H
#define __AC_KHASH_H
/*!
@header
Generic hash table library.
*/
#define AC_VERSION_KHASH_H "0.2.8"
#include <stdlib.h>
#include <string.h>
#include <limits.h>
/* compiler specific configuration */
#if UINT_MAX == 0xffffffffu
typedef unsigned int khint32_t;
#elif ULONG_MAX == 0xffffffffu
typedef unsigned long khint32_t;
#endif
#if ULONG_MAX == ULLONG_MAX
typedef unsigned long khint64_t;
#else
typedef unsigned long long khint64_t;
#endif
#ifndef kh_inline
#ifdef _MSC_VER
#define kh_inline __inline
#else
#define kh_inline inline
#endif
#endif /* kh_inline */
#ifndef klib_unused
#if (defined __clang__ && __clang_major__ >= 3) || (defined __GNUC__ && __GNUC__ >= 3)
#define klib_unused __attribute__ ((__unused__))
#else
#define klib_unused
#endif
#endif /* klib_unused */
typedef khint32_t khint_t;
typedef khint_t khiter_t;
#define __ac_isempty(flag, i) ((flag[i>>4]>>((i&0xfU)<<1))&2)
#define __ac_isdel(flag, i) ((flag[i>>4]>>((i&0xfU)<<1))&1)
#define __ac_iseither(flag, i) ((flag[i>>4]>>((i&0xfU)<<1))&3)
#define __ac_set_isdel_false(flag, i) (flag[i>>4]&=~(1ul<<((i&0xfU)<<1)))
#define __ac_set_isempty_false(flag, i) (flag[i>>4]&=~(2ul<<((i&0xfU)<<1)))
#define __ac_set_isboth_false(flag, i) (flag[i>>4]&=~(3ul<<((i&0xfU)<<1)))
#define __ac_set_isdel_true(flag, i) (flag[i>>4]|=1ul<<((i&0xfU)<<1))
#define __ac_fsize(m) ((m) < 16? 1 : (m)>>4)
#ifndef kroundup32
#define kroundup32(x) (--(x), (x)|=(x)>>1, (x)|=(x)>>2, (x)|=(x)>>4, (x)|=(x)>>8, (x)|=(x)>>16, ++(x))
#endif
#ifndef kcalloc
#define kcalloc(N,Z) calloc(N,Z)
#endif
#ifndef kmalloc
#define kmalloc(Z) malloc(Z)
#endif
#ifndef krealloc
#define krealloc(P,Z) realloc(P,Z)
#endif
#ifndef kfree
#define kfree(P) free(P)
#endif
static const double __ac_HASH_UPPER = 0.77;
#define __KHASH_TYPE(name, khkey_t, khval_t) \
typedef struct kh_##name##_s { \
khint_t n_buckets, size, n_occupied, upper_bound; \
khint32_t *flags; \
khkey_t *keys; \
khval_t *vals; \
} kh_##name##_t;
#define __KHASH_PROTOTYPES(name, khkey_t, khval_t) \
extern kh_##name##_t *kh_init_##name(void); \
extern void kh_destroy_##name(kh_##name##_t *h); \
extern void kh_clear_##name(kh_##name##_t *h); \
extern khint_t kh_get_##name(const kh_##name##_t *h, khkey_t key); \
extern int kh_resize_##name(kh_##name##_t *h, khint_t new_n_buckets); \
extern khint_t kh_put_##name(kh_##name##_t *h, khkey_t key, int *ret); \
extern void kh_del_##name(kh_##name##_t *h, khint_t x);
#define __KHASH_IMPL(name, SCOPE, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal) \
SCOPE kh_##name##_t *kh_init_##name(void) { \
return (kh_##name##_t*)kcalloc(1, sizeof(kh_##name##_t)); \
} \
SCOPE void kh_destroy_##name(kh_##name##_t *h) \
{ \
if (h) { \
kfree((void *)h->keys); kfree(h->flags); \
kfree((void *)h->vals); \
kfree(h); \
} \
} \
SCOPE void kh_clear_##name(kh_##name##_t *h) \
{ \
if (h && h->flags) { \
memset(h->flags, 0xaa, __ac_fsize(h->n_buckets) * sizeof(khint32_t)); \
h->size = h->n_occupied = 0; \
} \
} \
SCOPE khint_t kh_get_##name(const kh_##name##_t *h, khkey_t key) \
{ \
if (h->n_buckets) { \
khint_t k, i, last, mask, step = 0; \
mask = h->n_buckets - 1; \
k = __hash_func(key); i = k & mask; \
last = i; \
while (!__ac_isempty(h->flags, i) && (__ac_isdel(h->flags, i) || !__hash_equal(h->keys[i], key))) { \
i = (i + (++step)) & mask; \
if (i == last) return h->n_buckets; \
} \
return __ac_iseither(h->flags, i)? h->n_buckets : i; \
} else return 0; \
} \
SCOPE int kh_resize_##name(kh_##name##_t *h, khint_t new_n_buckets) \
{ /* This function uses 0.25*n_buckets bytes of working space instead of [sizeof(key_t+val_t)+.25]*n_buckets. */ \
khint32_t *new_flags = 0; \
khint_t j = 1; \
{ \
kroundup32(new_n_buckets); \
if (new_n_buckets < 4) new_n_buckets = 4; \
if (h->size >= (khint_t)(new_n_buckets * __ac_HASH_UPPER + 0.5)) j = 0; /* requested size is too small */ \
else { /* hash table size to be changed (shrink or expand); rehash */ \
new_flags = (khint32_t*)kmalloc(__ac_fsize(new_n_buckets) * sizeof(khint32_t)); \
if (!new_flags) return -1; \
memset(new_flags, 0xaa, __ac_fsize(new_n_buckets) * sizeof(khint32_t)); \
if (h->n_buckets < new_n_buckets) { /* expand */ \
khkey_t *new_keys = (khkey_t*)krealloc((void *)h->keys, new_n_buckets * sizeof(khkey_t)); \
if (!new_keys) { kfree(new_flags); return -1; } \
h->keys = new_keys; \
if (kh_is_map) { \
khval_t *new_vals = (khval_t*)krealloc((void *)h->vals, new_n_buckets * sizeof(khval_t)); \
if (!new_vals) { kfree(new_flags); return -1; } \
h->vals = new_vals; \
} \
} /* otherwise shrink */ \
} \
} \
if (j) { /* rehashing is needed */ \
for (j = 0; j != h->n_buckets; ++j) { \
if (__ac_iseither(h->flags, j) == 0) { \
khkey_t key = h->keys[j]; \
khval_t val; \
khint_t new_mask; \
new_mask = new_n_buckets - 1; \
if (kh_is_map) val = h->vals[j]; \
__ac_set_isdel_true(h->flags, j); \
while (1) { /* kick-out process; sort of like in Cuckoo hashing */ \
khint_t k, i, step = 0; \
k = __hash_func(key); \
i = k & new_mask; \
while (!__ac_isempty(new_flags, i)) i = (i + (++step)) & new_mask; \
__ac_set_isempty_false(new_flags, i); \
if (i < h->n_buckets && __ac_iseither(h->flags, i) == 0) { /* kick out the existing element */ \
{ khkey_t tmp = h->keys[i]; h->keys[i] = key; key = tmp; } \
if (kh_is_map) { khval_t tmp = h->vals[i]; h->vals[i] = val; val = tmp; } \
__ac_set_isdel_true(h->flags, i); /* mark it as deleted in the old hash table */ \
} else { /* write the element and jump out of the loop */ \
h->keys[i] = key; \
if (kh_is_map) h->vals[i] = val; \
break; \
} \
} \
} \
} \
if (h->n_buckets > new_n_buckets) { /* shrink the hash table */ \
h->keys = (khkey_t*)krealloc((void *)h->keys, new_n_buckets * sizeof(khkey_t)); \
if (kh_is_map) h->vals = (khval_t*)krealloc((void *)h->vals, new_n_buckets * sizeof(khval_t)); \
} \
kfree(h->flags); /* free the working space */ \
h->flags = new_flags; \
h->n_buckets = new_n_buckets; \
h->n_occupied = h->size; \
h->upper_bound = (khint_t)(h->n_buckets * __ac_HASH_UPPER + 0.5); \
} \
return 0; \
} \
SCOPE khint_t kh_put_##name(kh_##name##_t *h, khkey_t key, int *ret) \
{ \
khint_t x; \
if (h->n_occupied >= h->upper_bound) { /* update the hash table */ \
if (h->n_buckets > (h->size<<1)) { \
if (kh_resize_##name(h, h->n_buckets - 1) < 0) { /* clear "deleted" elements */ \
*ret = -1; return h->n_buckets; \
} \
} else if (kh_resize_##name(h, h->n_buckets + 1) < 0) { /* expand the hash table */ \
*ret = -1; return h->n_buckets; \
} \
} /* TODO: to implement automatically shrinking; resize() already support shrinking */ \
{ \
khint_t k, i, site, last, mask = h->n_buckets - 1, step = 0; \
x = site = h->n_buckets; k = __hash_func(key); i = k & mask; \
if (__ac_isempty(h->flags, i)) x = i; /* for speed up */ \
else { \
last = i; \
while (!__ac_isempty(h->flags, i) && (__ac_isdel(h->flags, i) || !__hash_equal(h->keys[i], key))) { \
if (__ac_isdel(h->flags, i)) site = i; \
i = (i + (++step)) & mask; \
if (i == last) { x = site; break; } \
} \
if (x == h->n_buckets) { \
if (__ac_isempty(h->flags, i) && site != h->n_buckets) x = site; \
else x = i; \
} \
} \
} \
if (__ac_isempty(h->flags, x)) { /* not present at all */ \
h->keys[x] = key; \
__ac_set_isboth_false(h->flags, x); \
++h->size; ++h->n_occupied; \
*ret = 1; \
} else if (__ac_isdel(h->flags, x)) { /* deleted */ \
h->keys[x] = key; \
__ac_set_isboth_false(h->flags, x); \
++h->size; \
*ret = 2; \
} else *ret = 0; /* Don't touch h->keys[x] if present and not deleted */ \
return x; \
} \
SCOPE void kh_del_##name(kh_##name##_t *h, khint_t x) \
{ \
if (x != h->n_buckets && !__ac_iseither(h->flags, x)) { \
__ac_set_isdel_true(h->flags, x); \
--h->size; \
} \
}
#define KHASH_DECLARE(name, khkey_t, khval_t) \
__KHASH_TYPE(name, khkey_t, khval_t) \
__KHASH_PROTOTYPES(name, khkey_t, khval_t)
#define KHASH_INIT2(name, SCOPE, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal) \
__KHASH_TYPE(name, khkey_t, khval_t) \
__KHASH_IMPL(name, SCOPE, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal)
#define KHASH_INIT(name, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal) \
KHASH_INIT2(name, static kh_inline klib_unused, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal)
/* --- BEGIN OF HASH FUNCTIONS --- */
/*! @function
@abstract Integer hash function
@param key The integer [khint32_t]
@return The hash value [khint_t]
*/
#define kh_int_hash_func(key) (khint32_t)(key)
/*! @function
@abstract Integer comparison function
*/
#define kh_int_hash_equal(a, b) ((a) == (b))
/*! @function
@abstract 64-bit integer hash function
@param key The integer [khint64_t]
@return The hash value [khint_t]
*/
#define kh_int64_hash_func(key) (khint32_t)((key)>>33^(key)^(key)<<11)
/*! @function
@abstract 64-bit integer comparison function
*/
#define kh_int64_hash_equal(a, b) ((a) == (b))
/*! @function
@abstract const char* hash function
@param s Pointer to a null terminated string
@return The hash value
*/
static kh_inline khint_t __ac_X31_hash_string(const char *s)
{
khint_t h = (khint_t)*s;
if (h) for (++s ; *s; ++s) h = (h << 5) - h + (khint_t)*s;
return h;
}
/*! @function
@abstract Another interface to const char* hash function
@param key Pointer to a null terminated string [const char*]
@return The hash value [khint_t]
*/
#define kh_str_hash_func(key) __ac_X31_hash_string(key)
/*! @function
@abstract Const char* comparison function
*/
#define kh_str_hash_equal(a, b) (strcmp(a, b) == 0)
static kh_inline khint_t __ac_Wang_hash(khint_t key)
{
key += ~(key << 15);
key ^= (key >> 10);
key += (key << 3);
key ^= (key >> 6);
key += ~(key << 11);
key ^= (key >> 16);
return key;
}
#define kh_int_hash_func2(key) __ac_Wang_hash((khint_t)key)
/* --- END OF HASH FUNCTIONS --- */
/* Other convenient macros... */
/*!
@abstract Type of the hash table.
@param name Name of the hash table [symbol]
*/
#define khash_t(name) kh_##name##_t
/*! @function
@abstract Initiate a hash table.
@param name Name of the hash table [symbol]
@return Pointer to the hash table [khash_t(name)*]
*/
#define kh_init(name) kh_init_##name()
/*! @function
@abstract Destroy a hash table.
@param name Name of the hash table [symbol]
@param h Pointer to the hash table [khash_t(name)*]
*/
#define kh_destroy(name, h) kh_destroy_##name(h)
/*! @function
@abstract Reset a hash table without deallocating memory.
@param name Name of the hash table [symbol]
@param h Pointer to the hash table [khash_t(name)*]
*/
#define kh_clear(name, h) kh_clear_##name(h)
/*! @function
@abstract Resize a hash table.
@param name Name of the hash table [symbol]
@param h Pointer to the hash table [khash_t(name)*]
@param s New size [khint_t]
*/
#define kh_resize(name, h, s) kh_resize_##name(h, s)
/*! @function
@abstract Insert a key to the hash table.
@param name Name of the hash table [symbol]
@param h Pointer to the hash table [khash_t(name)*]
@param k Key [type of keys]
@param r Extra return code: -1 if the operation failed;
0 if the key is present in the hash table;
1 if the bucket is empty (never used); 2 if the element in
the bucket has been deleted [int*]
@return Iterator to the inserted element [khint_t]
*/
#define kh_put(name, h, k, r) kh_put_##name(h, k, r)
/*! @function
@abstract Retrieve a key from the hash table.
@param name Name of the hash table [symbol]
@param h Pointer to the hash table [khash_t(name)*]
@param k Key [type of keys]
@return Iterator to the found element, or kh_end(h) if the element is absent [khint_t]
*/
#define kh_get(name, h, k) kh_get_##name(h, k)
/*! @function
@abstract Remove a key from the hash table.
@param name Name of the hash table [symbol]
@param h Pointer to the hash table [khash_t(name)*]
@param k Iterator to the element to be deleted [khint_t]
*/
#define kh_del(name, h, k) kh_del_##name(h, k)
/*! @function
@abstract Test whether a bucket contains data.
@param h Pointer to the hash table [khash_t(name)*]
@param x Iterator to the bucket [khint_t]
@return 1 if containing data; 0 otherwise [int]
*/
#define kh_exist(h, x) (!__ac_iseither((h)->flags, (x)))
/*! @function
@abstract Get key given an iterator
@param h Pointer to the hash table [khash_t(name)*]
@param x Iterator to the bucket [khint_t]
@return Key [type of keys]
*/
#define kh_key(h, x) ((h)->keys[x])
/*! @function
@abstract Get value given an iterator
@param h Pointer to the hash table [khash_t(name)*]
@param x Iterator to the bucket [khint_t]
@return Value [type of values]
@discussion For hash sets, calling this results in segfault.
*/
#define kh_val(h, x) ((h)->vals[x])
/*! @function
@abstract Alias of kh_val()
*/
#define kh_value(h, x) ((h)->vals[x])
/*! @function
@abstract Get the start iterator
@param h Pointer to the hash table [khash_t(name)*]
@return The start iterator [khint_t]
*/
#define kh_begin(h) (khint_t)(0)
/*! @function
@abstract Get the end iterator
@param h Pointer to the hash table [khash_t(name)*]
@return The end iterator [khint_t]
*/
#define kh_end(h) ((h)->n_buckets)
/*! @function
@abstract Get the number of elements in the hash table
@param h Pointer to the hash table [khash_t(name)*]
@return Number of elements in the hash table [khint_t]
*/
#define kh_size(h) ((h)->size)
/*! @function
@abstract Get the number of buckets in the hash table
@param h Pointer to the hash table [khash_t(name)*]
@return Number of buckets in the hash table [khint_t]
*/
#define kh_n_buckets(h) ((h)->n_buckets)
/*! @function
@abstract Iterate over the entries in the hash table
@param h Pointer to the hash table [khash_t(name)*]
@param kvar Variable to which key will be assigned
@param vvar Variable to which value will be assigned
@param code Block of code to execute
*/
#define kh_foreach(h, kvar, vvar, code) { khint_t __i; \
for (__i = kh_begin(h); __i != kh_end(h); ++__i) { \
if (!kh_exist(h,__i)) continue; \
(kvar) = kh_key(h,__i); \
(vvar) = kh_val(h,__i); \
code; \
} }
/*! @function
@abstract Iterate over the values in the hash table
@param h Pointer to the hash table [khash_t(name)*]
@param vvar Variable to which value will be assigned
@param code Block of code to execute
*/
#define kh_foreach_value(h, vvar, code) { khint_t __i; \
for (__i = kh_begin(h); __i != kh_end(h); ++__i) { \
if (!kh_exist(h,__i)) continue; \
(vvar) = kh_val(h,__i); \
code; \
} }
/* More convenient interfaces */
/*! @function
@abstract Instantiate a hash set containing integer keys
@param name Name of the hash table [symbol]
*/
#define KHASH_SET_INIT_INT(name) \
KHASH_INIT(name, khint32_t, char, 0, kh_int_hash_func, kh_int_hash_equal)
/*! @function
@abstract Instantiate a hash map containing integer keys
@param name Name of the hash table [symbol]
@param khval_t Type of values [type]
*/
#define KHASH_MAP_INIT_INT(name, khval_t) \
KHASH_INIT(name, khint32_t, khval_t, 1, kh_int_hash_func, kh_int_hash_equal)
/*! @function
@abstract Instantiate a hash set containing 64-bit integer keys
@param name Name of the hash table [symbol]
*/
#define KHASH_SET_INIT_INT64(name) \
KHASH_INIT(name, khint64_t, char, 0, kh_int64_hash_func, kh_int64_hash_equal)
/*! @function
@abstract Instantiate a hash map containing 64-bit integer keys
@param name Name of the hash table [symbol]
@param khval_t Type of values [type]
*/
#define KHASH_MAP_INIT_INT64(name, khval_t) \
KHASH_INIT(name, khint64_t, khval_t, 1, kh_int64_hash_func, kh_int64_hash_equal)
typedef const char *kh_cstr_t;
/*! @function
@abstract Instantiate a hash map containing const char* keys
@param name Name of the hash table [symbol]
*/
#define KHASH_SET_INIT_STR(name) \
KHASH_INIT(name, kh_cstr_t, char, 0, kh_str_hash_func, kh_str_hash_equal)
/*! @function
@abstract Instantiate a hash map containing const char* keys
@param name Name of the hash table [symbol]
@param khval_t Type of values [type]
*/
#define KHASH_MAP_INIT_STR(name, khval_t) \
KHASH_INIT(name, kh_cstr_t, khval_t, 1, kh_str_hash_func, kh_str_hash_equal)
#endif /* __AC_KHASH_H */

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/* The MIT License
Copyright (c) 2008, by Attractive Chaos <attractor@live.co.uk>
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
/*
An example:
#include "kvec.h"
int main() {
kvec_t(int) array;
kv_init(array);
kv_push(int, array, 10); // append
kv_a(int, array, 20) = 5; // dynamic
kv_A(array, 20) = 4; // static
kv_destroy(array);
return 0;
}
*/
/*
2008-09-22 (0.1.0):
* The initial version.
*/
#ifndef AC_KVEC_H
#define AC_KVEC_H
#include <stdlib.h>
#define kv_roundup32(x) (--(x), (x)|=(x)>>1, (x)|=(x)>>2, (x)|=(x)>>4, (x)|=(x)>>8, (x)|=(x)>>16, ++(x))
#define kvec_t(type) struct { size_t n, m; type *a; }
#define kv_init(v) ((v).n = (v).m = 0, (v).a = 0)
#define kv_destroy(v) free((v).a)
#define kv_A(v, i) ((v).a[(i)])
#define kv_pop(v) ((v).a[--(v).n])
#define kv_size(v) ((v).n)
#define kv_max(v) ((v).m)
#define kv_end(v) (kv_A(v,kv_size(v)-1))
#define kv_delete(v,i) (kv_A(v,i) = kv_pop(v))
#define kv_resize(type, v, s) ((v).m = (s), (v).a = (type*)realloc((v).a, sizeof(type) * (v).m))
#define kv_copy(type, v1, v0) do { \
if ((v1).m < (v0).n) kv_resize(type, v1, (v0).n); \
(v1).n = (v0).n; \
memcpy((v1).a, (v0).a, sizeof(type) * (v0).n); \
} while (0) \
#define kv_push(type, v, x) do { \
if ((v).n == (v).m) { \
(v).m = (v).m? (v).m<<1 : 2; \
(v).a = (type*)realloc((v).a, sizeof(type) * (v).m); \
} \
(v).a[(v).n++] = (x); \
} while (0)
#define kv_pushp(type, v) (((v).n == (v).m)? \
((v).m = ((v).m? (v).m<<1 : 2), \
(v).a = (type*)realloc((v).a, sizeof(type) * (v).m), 0) \
: 0), ((v).a + ((v).n++))
#define kv_a(type, v, i) (((v).m <= (size_t)(i)? \
((v).m = (v).n = (i) + 1, kv_roundup32((v).m), \
(v).a = (type*)realloc((v).a, sizeof(type) * (v).m), 0) \
: (v).n <= (size_t)(i)? (v).n = (i) + 1 \
: 0), (v).a[(i)])
#endif

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/*
ISC License
Copyright (c) 2020, Antonio SJ Musumeci <trapexit@spawn.link>
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#pragma once
#include "fmp.h"
#include <pthread.h>
typedef struct lfmp_t lfmp_t;
struct lfmp_t
{
fmp_t fmp;
pthread_mutex_t lock;
};
static
inline
void
lfmp_init(lfmp_t *lfmp_,
const uint64_t obj_size_,
const uint64_t page_multiple_)
{
fmp_init(&lfmp_->fmp,obj_size_,page_multiple_);
pthread_mutex_init(&lfmp_->lock,NULL);
}
static
inline
uint64_t
lfmp_slab_count(lfmp_t *lfmp_)
{
uint64_t rv;
pthread_mutex_lock(&lfmp_->lock);
rv = fmp_slab_count(&lfmp_->fmp);
pthread_mutex_unlock(&lfmp_->lock);
return rv;
}
static
inline
int
lfmp_slab_alloc(lfmp_t *lfmp_)
{
int rv;
pthread_mutex_lock(&lfmp_->lock);
rv = fmp_slab_alloc(&lfmp_->fmp);
pthread_mutex_unlock(&lfmp_->lock);
return rv;
}
static
inline
void*
lfmp_alloc(lfmp_t *lfmp_)
{
void *rv;
pthread_mutex_lock(&lfmp_->lock);
rv = fmp_alloc(&lfmp_->fmp);
pthread_mutex_unlock(&lfmp_->lock);
return rv;
}
static
inline
void*
lfmp_calloc(lfmp_t *lfmp_)
{
void *rv;
pthread_mutex_lock(&lfmp_->lock);
rv = fmp_calloc(&lfmp_->fmp);
pthread_mutex_unlock(&lfmp_->lock);
return rv;
}
static
inline
void
lfmp_free(lfmp_t *lfmp_,
void *obj_)
{
pthread_mutex_lock(&lfmp_->lock);
fmp_free(&lfmp_->fmp,obj_);
pthread_mutex_unlock(&lfmp_->lock);
}
static
inline
void
lfmp_clear(lfmp_t *lfmp_)
{
pthread_mutex_lock(&lfmp_->lock);
fmp_clear(&lfmp_->fmp);
pthread_mutex_unlock(&lfmp_->lock);
}
static
inline
void
lfmp_destroy(lfmp_t *lfmp_)
{
pthread_mutex_lock(&lfmp_->lock);
fmp_destroy(&lfmp_->fmp);
pthread_mutex_unlock(&lfmp_->lock);
pthread_mutex_destroy(&lfmp_->lock);
}
static
inline
uint64_t
lfmp_avail_objs(lfmp_t *lfmp_)
{
uint64_t rv;
pthread_mutex_lock(&lfmp_->lock);
rv = fmp_avail_objs(&lfmp_->fmp);
pthread_mutex_unlock(&lfmp_->lock);
return rv;
}
static
inline
uint64_t
lfmp_objs_in_slab(lfmp_t *lfmp_,
void *slab_)
{
uint64_t rv;
pthread_mutex_lock(&lfmp_->lock);
rv = fmp_objs_in_slab(&lfmp_->fmp,slab_);
pthread_mutex_unlock(&lfmp_->lock);
return rv;
}
static
inline
void
lfmp_remove_objs_in_slab(lfmp_t *lfmp_,
void *slab_)
{
pthread_mutex_lock(&lfmp_->lock);
fmp_remove_objs_in_slab(&lfmp_->fmp,slab_);
pthread_mutex_unlock(&lfmp_->lock);
}
static
inline
int
lfmp_gc(lfmp_t *lfmp_)
{
int rv;
pthread_mutex_lock(&lfmp_->lock);
rv = fmp_gc(&lfmp_->fmp);
pthread_mutex_unlock(&lfmp_->lock);
return rv;
}
static
inline
uint64_t
lfmp_objs_per_slab(lfmp_t *lfmp_)
{
uint64_t rv;
pthread_mutex_lock(&lfmp_->lock);
rv = fmp_objs_per_slab(&lfmp_->fmp);
pthread_mutex_unlock(&lfmp_->lock);
return rv;
}
static
inline
double
lfmp_slab_usage_ratio(lfmp_t *lfmp_)
{
double rv;
pthread_mutex_lock(&lfmp_->lock);
rv = fmp_slab_usage_ratio(&lfmp_->fmp);
pthread_mutex_unlock(&lfmp_->lock);
return rv;
}