blob: 2c1aa17d81fb69ca1a060978221e106bc9967525 [file] [log] [blame]
/*
FUSE: Filesystem in Userspace
Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU LGPLv2.
See the file COPYING.LIB
*/
/* For pthread_rwlock_t */
#define _GNU_SOURCE
#include "config.h"
#include "fuse_i.h"
#include "fuse_lowlevel.h"
#include "fuse_opt.h"
#include "fuse_misc.h"
#include "fuse_common_compat.h"
#include "fuse_compat.h"
#include "fuse_kernel.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdbool.h>
#include <unistd.h>
#include <time.h>
#include <fcntl.h>
#include <limits.h>
#include <errno.h>
#include <signal.h>
#include <assert.h>
#include <poll.h>
#include <sys/param.h>
#include <sys/uio.h>
#include <sys/time.h>
#include <sys/mman.h>
#include <sys/file.h>
#ifdef USE_MODULES
#include <dlfcn.h>
#endif
#define FUSE_NODE_SLAB 1
#ifndef MAP_ANONYMOUS
#undef FUSE_NODE_SLAB
#endif
#define FUSE_DEFAULT_INTR_SIGNAL SIGUSR1
#define FUSE_UNKNOWN_INO 0xffffffff
#define OFFSET_MAX 0x7fffffffffffffffLL
#define NODE_TABLE_MIN_SIZE 8192
struct fuse_config {
unsigned int uid;
unsigned int gid;
unsigned int umask;
double entry_timeout;
double negative_timeout;
double attr_timeout;
double ac_attr_timeout;
int ac_attr_timeout_set;
int remember;
int nopath;
int debug;
int hard_remove;
int use_ino;
int readdir_ino;
int set_mode;
int set_uid;
int set_gid;
int direct_io;
int kernel_cache;
int auto_cache;
int intr;
int intr_signal;
int help;
char *modules;
};
struct fuse_fs {
struct fuse_operations op;
struct fuse_module *m;
void *user_data;
int compat;
int debug;
};
struct fusemod_so {
void *handle;
int ctr;
};
struct lock_queue_element {
struct lock_queue_element *next;
pthread_cond_t cond;
fuse_ino_t nodeid1;
const char *name1;
char **path1;
struct node **wnode1;
fuse_ino_t nodeid2;
const char *name2;
char **path2;
struct node **wnode2;
int err;
bool first_locked : 1;
bool second_locked : 1;
bool done : 1;
};
struct node_table {
struct node **array;
size_t use;
size_t size;
size_t split;
};
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
#define list_entry(ptr, type, member) \
container_of(ptr, type, member)
struct list_head {
struct list_head *next;
struct list_head *prev;
};
struct node_slab {
struct list_head list; /* must be the first member */
struct list_head freelist;
int used;
};
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;
unsigned int generation;
unsigned int hidectr;
pthread_mutex_t lock;
struct fuse_config conf;
int intr_installed;
struct fuse_fs *fs;
int nullpath_ok;
int utime_omit_ok;
struct lock_queue_element *lockq;
int pagesize;
struct list_head partial_slabs;
struct list_head full_slabs;
pthread_t prune_thread;
};
struct lock {
int type;
loff_t start;
loff_t end;
pid_t pid;
uint64_t owner;
struct lock *next;
};
struct node {
struct node *name_next;
struct node *id_next;
fuse_ino_t nodeid;
unsigned int generation;
int refctr;
struct node *parent;
char *name;
uint64_t nlookup;
int open_count;
struct timespec stat_updated;
struct timespec mtime;
loff_t size;
struct lock *locks;
unsigned int is_hidden : 1;
unsigned int cache_valid : 1;
int treelock;
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;
struct fuse *fuse;
fuse_req_t req;
char *contents;
int allocated;
unsigned len;
unsigned size;
unsigned needlen;
int filled;
uint64_t fh;
int error;
fuse_ino_t nodeid;
};
/* old dir handle */
struct fuse_dirhandle {
fuse_fill_dir_t filler;
void *buf;
};
struct fuse_context_i {
struct fuse_context ctx;
fuse_req_t req;
};
static pthread_key_t fuse_context_key;
static pthread_mutex_t fuse_context_lock = PTHREAD_MUTEX_INITIALIZER;
static int fuse_context_ref;
#ifdef USE_MODULES
static struct fusemod_so *fuse_current_so;
static struct fuse_module *fuse_modules;
static int fuse_load_so_name(const char *soname)
{
struct fusemod_so *so;
so = calloc(1, sizeof(struct fusemod_so));
if (!so) {
fprintf(stderr, "fuse: memory allocation failed\n");
return -1;
}
fuse_current_so = so;
so->handle = dlopen(soname, RTLD_NOW);
fuse_current_so = NULL;
if (!so->handle) {
fprintf(stderr, "fuse: %s\n", dlerror());
goto err;
}
if (!so->ctr) {
fprintf(stderr, "fuse: %s did not register any modules\n",
soname);
goto err;
}
return 0;
err:
if (so->handle)
dlclose(so->handle);
free(so);
return -1;
}
static int fuse_load_so_module(const char *module)
{
int res;
char *soname = malloc(strlen(module) + 64);
if (!soname) {
fprintf(stderr, "fuse: memory allocation failed\n");
return -1;
}
sprintf(soname, "libfusemod_%s.so", module);
res = fuse_load_so_name(soname);
free(soname);
return res;
}
static struct fuse_module *fuse_find_module(const char *module)
{
struct fuse_module *m;
for (m = fuse_modules; m; m = m->next) {
if (strcmp(module, m->name) == 0) {
m->ctr++;
break;
}
}
return m;
}
static struct fuse_module *fuse_get_module(const char *module)
{
struct fuse_module *m;
pthread_mutex_lock(&fuse_context_lock);
m = fuse_find_module(module);
if (!m) {
int err = fuse_load_so_module(module);
if (!err)
m = fuse_find_module(module);
}
pthread_mutex_unlock(&fuse_context_lock);
return m;
}
static void fuse_put_module(struct fuse_module *m)
{
pthread_mutex_lock(&fuse_context_lock);
assert(m->ctr > 0);
m->ctr--;
if (!m->ctr && m->so) {
struct fusemod_so *so = m->so;
assert(so->ctr > 0);
so->ctr--;
if (!so->ctr) {
struct fuse_module **mp;
for (mp = &fuse_modules; *mp;) {
if ((*mp)->so == so)
*mp = (*mp)->next;
else
mp = &(*mp)->next;
}
dlclose(so->handle);
free(so);
}
}
pthread_mutex_unlock(&fuse_context_lock);
}
#endif
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, struct list_head *prev,
struct list_head *next)
{
next->prev = new;
new->next = next;
new->prev = prev;
prev->next = new;
}
static inline void list_add_head(struct list_head *new, struct list_head *head)
{
list_add(new, head, head->next);
}
static inline void list_add_tail(struct list_head *new, struct list_head *head)
{
list_add(new, head->prev, head);
}
static inline void list_del(struct list_head *entry)
{
struct list_head *prev = entry->prev;
struct list_head *next = entry->next;
next->prev = prev;
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);
}
static 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);
}
}
#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 id_hash(struct fuse *f, fuse_ino_t ino)
{
uint64_t hash = ((uint32_t) ino * 2654435761U) % f->id_table.size;
uint64_t oldhash = hash % (f->id_table.size / 2);
if (oldhash >= f->id_table.split)
return oldhash;
else
return hash;
}
static struct node *get_node_nocheck(struct fuse *f, fuse_ino_t nodeid)
{
size_t hash = id_hash(f, nodeid);
struct node *node;
for (node = f->id_table.array[hash]; node != NULL; node = node->id_next)
if (node->nodeid == nodeid)
return node;
return NULL;
}
static struct node *get_node(struct fuse *f, fuse_ino_t nodeid)
{
struct node *node = get_node_nocheck(f, nodeid);
if (!node) {
fprintf(stderr, "fuse internal error: node %llu not found\n",
(unsigned long long) nodeid);
abort();
}
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)
{
struct node_lru *lnode = node_lru(node);
list_del(&lnode->lru);
init_list_head(&lnode->lru);
}
static void set_forget_time(struct fuse *f, struct node *node)
{
struct node_lru *lnode = node_lru(node);
list_del(&lnode->lru);
list_add_tail(&lnode->lru, &f->lru_table);
curr_time(&lnode->forget_time);
}
static void free_node(struct fuse *f, struct node *node)
{
if (node->name != node->inline_name)
free(node->name);
free_node_mem(f, node);
}
static void node_table_reduce(struct node_table *t)
{
size_t newsize = t->size / 2;
void *newarray;
if (newsize < NODE_TABLE_MIN_SIZE)
return;
newarray = realloc(t->array, sizeof(struct node *) * newsize);
if (newarray != NULL)
t->array = newarray;
t->size = newsize;
t->split = t->size / 2;
}
static void remerge_id(struct fuse *f)
{
struct node_table *t = &f->id_table;
int iter;
if (t->split == 0)
node_table_reduce(t);
for (iter = 8; t->split > 0 && iter; iter--) {
struct node **upper;
t->split--;
upper = &t->array[t->split + t->size / 2];
if (*upper) {
struct node **nodep;
for (nodep = &t->array[t->split]; *nodep;
nodep = &(*nodep)->id_next);
*nodep = *upper;
*upper = NULL;
break;
}
}
}
static void unhash_id(struct fuse *f, struct node *node)
{
struct node **nodep = &f->id_table.array[id_hash(f, node->nodeid)];
for (; *nodep != NULL; nodep = &(*nodep)->id_next)
if (*nodep == node) {
*nodep = node->id_next;
f->id_table.use--;
if(f->id_table.use < f->id_table.size / 4)
remerge_id(f);
return;
}
}
static int node_table_resize(struct node_table *t)
{
size_t newsize = t->size * 2;
void *newarray;
newarray = realloc(t->array, sizeof(struct node *) * newsize);
if (newarray == NULL)
return -1;
t->array = newarray;
memset(t->array + t->size, 0, t->size * sizeof(struct node *));
t->size = newsize;
t->split = 0;
return 0;
}
static void rehash_id(struct fuse *f)
{
struct node_table *t = &f->id_table;
struct node **nodep;
struct node **next;
size_t hash;
if (t->split == t->size / 2)
return;
hash = t->split;
t->split++;
for (nodep = &t->array[hash]; *nodep != NULL; nodep = next) {
struct node *node = *nodep;
size_t newhash = id_hash(f, node->nodeid);
if (newhash != hash) {
next = nodep;
*nodep = node->id_next;
node->id_next = t->array[newhash];
t->array[newhash] = node;
} else {
next = &node->id_next;
}
}
if (t->split == t->size / 2)
node_table_resize(t);
}
static void hash_id(struct fuse *f, struct node *node)
{
size_t hash = id_hash(f, node->nodeid);
node->id_next = f->id_table.array[hash];
f->id_table.array[hash] = node;
f->id_table.use++;
if (f->id_table.use >= f->id_table.size / 2)
rehash_id(f);
}
static size_t name_hash(struct fuse *f, fuse_ino_t parent,
const char *name)
{
uint64_t hash = parent;
uint64_t oldhash;
for (; *name; name++)
hash = hash * 31 + (unsigned char) *name;
hash %= f->name_table.size;
oldhash = hash % (f->name_table.size / 2);
if (oldhash >= f->name_table.split)
return oldhash;
else
return hash;
}
static void unref_node(struct fuse *f, struct node *node);
static void remerge_name(struct fuse *f)
{
struct node_table *t = &f->name_table;
int iter;
if (t->split == 0)
node_table_reduce(t);
for (iter = 8; t->split > 0 && iter; iter--) {
struct node **upper;
t->split--;
upper = &t->array[t->split + t->size / 2];
if (*upper) {
struct node **nodep;
for (nodep = &t->array[t->split]; *nodep;
nodep = &(*nodep)->name_next);
*nodep = *upper;
*upper = NULL;
break;
}
}
}
static void unhash_name(struct fuse *f, struct node *node)
{
if (node->name) {
size_t hash = name_hash(f, node->parent->nodeid, node->name);
struct node **nodep = &f->name_table.array[hash];
for (; *nodep != NULL; nodep = &(*nodep)->name_next)
if (*nodep == node) {
*nodep = node->name_next;
node->name_next = NULL;
unref_node(f, node->parent);
if (node->name != node->inline_name)
free(node->name);
node->name = NULL;
node->parent = NULL;
f->name_table.use--;
if (f->name_table.use < f->name_table.size / 4)
remerge_name(f);
return;
}
fprintf(stderr,
"fuse internal error: unable to unhash node: %llu\n",
(unsigned long long) node->nodeid);
abort();
}
}
static void rehash_name(struct fuse *f)
{
struct node_table *t = &f->name_table;
struct node **nodep;
struct node **next;
size_t hash;
if (t->split == t->size / 2)
return;
hash = t->split;
t->split++;
for (nodep = &t->array[hash]; *nodep != NULL; nodep = next) {
struct node *node = *nodep;
size_t newhash = name_hash(f, node->parent->nodeid, node->name);
if (newhash != hash) {
next = nodep;
*nodep = node->name_next;
node->name_next = t->array[newhash];
t->array[newhash] = node;
} else {
next = &node->name_next;
}
}
if (t->split == t->size / 2)
node_table_resize(t);
}
static int hash_name(struct fuse *f, struct node *node, fuse_ino_t parentid,
const char *name)
{
size_t hash = name_hash(f, parentid, name);
struct node *parent = get_node(f, parentid);
if (strlen(name) < sizeof(node->inline_name)) {
strcpy(node->inline_name, name);
node->name = node->inline_name;
} else {
node->name = strdup(name);
if (node->name == NULL)
return -1;
}
parent->refctr ++;
node->parent = parent;
node->name_next = f->name_table.array[hash];
f->name_table.array[hash] = node;
f->name_table.use++;
if (f->name_table.use >= f->name_table.size / 2)
rehash_name(f);
return 0;
}
static void delete_node(struct fuse *f, struct node *node)
{
if (f->conf.debug)
fprintf(stderr, "DELETE: %llu\n",
(unsigned long long) node->nodeid);
assert(node->treelock == 0);
unhash_name(f, node);
if (lru_enabled(f))
remove_node_lru(node);
unhash_id(f, node);
free_node(f, node);
}
static void unref_node(struct fuse *f, struct node *node)
{
assert(node->refctr > 0);
node->refctr --;
if (!node->refctr)
delete_node(f, node);
}
static fuse_ino_t next_id(struct fuse *f)
{
do {
f->ctr = (f->ctr + 1) & 0xffffffff;
if (!f->ctr)
f->generation ++;
} while (f->ctr == 0 || f->ctr == FUSE_UNKNOWN_INO ||
get_node_nocheck(f, f->ctr) != NULL);
return f->ctr;
}
static struct node *lookup_node(struct fuse *f, fuse_ino_t parent,
const char *name)
{
size_t hash = name_hash(f, parent, name);
struct node *node;
for (node = f->name_table.array[hash]; node != NULL; node = node->name_next)
if (node->parent->nodeid == parent &&
strcmp(node->name, name) == 0)
return node;
return NULL;
}
static void inc_nlookup(struct node *node)
{
if (!node->nlookup)
node->refctr++;
node->nlookup++;
}
static struct node *find_node(struct fuse *f, fuse_ino_t parent,
const char *name)
{
struct node *node;
pthread_mutex_lock(&f->lock);
if (!name)
node = get_node(f, parent);
else
node = lookup_node(f, parent, name);
if (node == NULL) {
node = alloc_node(f);
if (node == NULL)
goto out_err;
node->nodeid = next_id(f);
node->generation = f->generation;
if (f->conf.remember)
inc_nlookup(node);
if (hash_name(f, node, parent, name) == -1) {
free_node(f, node);
node = NULL;
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) {
remove_node_lru(node);
}
inc_nlookup(node);
out_err:
pthread_mutex_unlock(&f->lock);
return node;
}
static char *add_name(char **buf, unsigned *bufsize, char *s, const char *name)
{
size_t len = strlen(name);
if (s - len <= *buf) {
unsigned pathlen = *bufsize - (s - *buf);
unsigned newbufsize = *bufsize;
char *newbuf;
while (newbufsize < pathlen + len + 1) {
if (newbufsize >= 0x80000000)
newbufsize = 0xffffffff;
else
newbufsize *= 2;
}
newbuf = realloc(*buf, newbufsize);
if (newbuf == NULL)
return NULL;
*buf = newbuf;
s = newbuf + newbufsize - pathlen;
memmove(s, newbuf + *bufsize - pathlen, pathlen);
*bufsize = newbufsize;
}
s -= len;
strncpy(s, name, len);
s--;
*s = '/';
return s;
}
static void unlock_path(struct fuse *f, fuse_ino_t nodeid, struct node *wnode,
struct node *end)
{
struct node *node;
if (wnode) {
assert(wnode->treelock == TREELOCK_WRITE);
wnode->treelock = 0;
}
for (node = get_node(f, nodeid);
node != end && node->nodeid != FUSE_ROOT_ID; node = node->parent) {
assert(node->treelock != 0);
assert(node->treelock != TREELOCK_WAIT_OFFSET);
assert(node->treelock != TREELOCK_WRITE);
node->treelock--;
if (node->treelock == TREELOCK_WAIT_OFFSET)
node->treelock = 0;
}
}
static int try_get_path(struct fuse *f, fuse_ino_t nodeid, const char *name,
char **path, struct node **wnodep, bool need_lock)
{
unsigned bufsize = 256;
char *buf;
char *s;
struct node *node;
struct node *wnode = NULL;
int err;
*path = NULL;
err = -ENOMEM;
buf = malloc(bufsize);
if (buf == NULL)
goto out_err;
s = buf + bufsize - 1;
*s = '\0';
if (name != NULL) {
s = add_name(&buf, &bufsize, s, name);
err = -ENOMEM;
if (s == NULL)
goto out_free;
}
if (wnodep) {
assert(need_lock);
wnode = lookup_node(f, nodeid, name);
if (wnode) {
if (wnode->treelock != 0) {
if (wnode->treelock > 0)
wnode->treelock += TREELOCK_WAIT_OFFSET;
err = -EAGAIN;
goto out_free;
}
wnode->treelock = TREELOCK_WRITE;
}
}
for (node = get_node(f, nodeid); node->nodeid != FUSE_ROOT_ID;
node = node->parent) {
err = -ENOENT;
if (node->name == NULL || node->parent == NULL)
goto out_unlock;
err = -ENOMEM;
s = add_name(&buf, &bufsize, s, node->name);
if (s == NULL)
goto out_unlock;
if (need_lock) {
err = -EAGAIN;
if (node->treelock < 0)
goto out_unlock;
node->treelock++;
}
}
if (s[0])
memmove(buf, s, bufsize - (s - buf));
else
strcpy(buf, "/");
*path = buf;
if (wnodep)
*wnodep = wnode;
return 0;
out_unlock:
if (need_lock)
unlock_path(f, nodeid, wnode, node);
out_free:
free(buf);
out_err:
return err;
}
static void queue_element_unlock(struct fuse *f, struct lock_queue_element *qe)
{
struct node *wnode;
if (qe->first_locked) {
wnode = qe->wnode1 ? *qe->wnode1 : NULL;
unlock_path(f, qe->nodeid1, wnode, NULL);
qe->first_locked = false;
}
if (qe->second_locked) {
wnode = qe->wnode2 ? *qe->wnode2 : NULL;
unlock_path(f, qe->nodeid2, wnode, NULL);
qe->second_locked = false;
}
}
static void queue_element_wakeup(struct fuse *f, struct lock_queue_element *qe)
{
int err;
bool first = (qe == f->lockq);
if (!qe->path1) {
/* Just waiting for it to be unlocked */
if (get_node(f, qe->nodeid1)->treelock == 0)
pthread_cond_signal(&qe->cond);
return;
}
if (!qe->first_locked) {
err = try_get_path(f, qe->nodeid1, qe->name1, qe->path1,
qe->wnode1, true);
if (!err)
qe->first_locked = true;
else if (err != -EAGAIN)
goto err_unlock;
}
if (!qe->second_locked && qe->path2) {
err = try_get_path(f, qe->nodeid2, qe->name2, qe->path2,
qe->wnode2, true);
if (!err)
qe->second_locked = true;
else if (err != -EAGAIN)
goto err_unlock;
}
if (qe->first_locked && (qe->second_locked || !qe->path2)) {
err = 0;
goto done;
}
/*
* Only let the first element be partially locked otherwise there could
* be a deadlock.
*
* But do allow the first element to be partially locked to prevent
* starvation.
*/
if (!first)
queue_element_unlock(f, qe);
/* keep trying */
return;
err_unlock:
queue_element_unlock(f, qe);
done:
qe->err = err;
qe->done = true;
pthread_cond_signal(&qe->cond);
}
static void wake_up_queued(struct fuse *f)
{
struct lock_queue_element *qe;
for (qe = f->lockq; qe != NULL; qe = qe->next)
queue_element_wakeup(f, qe);
}
static void debug_path(struct fuse *f, const char *msg, fuse_ino_t nodeid,
const char *name, bool wr)
{
if (f->conf.debug) {
struct node *wnode = NULL;
if (wr)
wnode = lookup_node(f, nodeid, name);
if (wnode)
fprintf(stderr, "%s %li (w)\n", msg, wnode->nodeid);
else
fprintf(stderr, "%s %li\n", msg, nodeid);
}
}
static void queue_path(struct fuse *f, struct lock_queue_element *qe)
{
struct lock_queue_element **qp;
qe->done = false;
qe->first_locked = false;
qe->second_locked = false;
pthread_cond_init(&qe->cond, NULL);
qe->next = NULL;
for (qp = &f->lockq; *qp != NULL; qp = &(*qp)->next);
*qp = qe;
}
static void dequeue_path(struct fuse *f, struct lock_queue_element *qe)
{
struct lock_queue_element **qp;
pthread_cond_destroy(&qe->cond);
for (qp = &f->lockq; *qp != qe; qp = &(*qp)->next);
*qp = qe->next;
}
static int wait_path(struct fuse *f, struct lock_queue_element *qe)
{
queue_path(f, qe);
do {
pthread_cond_wait(&qe->cond, &f->lock);
} while (!qe->done);
dequeue_path(f, qe);
return qe->err;
}
static int get_path_common(struct fuse *f, fuse_ino_t nodeid, const char *name,
char **path, struct node **wnode)
{
int err;
pthread_mutex_lock(&f->lock);
err = try_get_path(f, nodeid, name, path, wnode, true);
if (err == -EAGAIN) {
struct lock_queue_element qe = {
.nodeid1 = nodeid,
.name1 = name,
.path1 = path,
.wnode1 = wnode,
};
debug_path(f, "QUEUE PATH", nodeid, name, !!wnode);
err = wait_path(f, &qe);
debug_path(f, "DEQUEUE PATH", nodeid, name, !!wnode);
}
pthread_mutex_unlock(&f->lock);
return err;
}
static int get_path(struct fuse *f, fuse_ino_t nodeid, char **path)
{
return get_path_common(f, nodeid, NULL, path, NULL);
}
static int get_path_nullok(struct fuse *f, fuse_ino_t nodeid, char **path)
{
int err = 0;
if (f->conf.nopath) {
*path = NULL;
} else {
err = get_path_common(f, nodeid, NULL, path, NULL);
if (err == -ENOENT && f->nullpath_ok)
err = 0;
}
return err;
}
static int get_path_name(struct fuse *f, fuse_ino_t nodeid, const char *name,
char **path)
{
return get_path_common(f, nodeid, name, path, NULL);
}
static int get_path_wrlock(struct fuse *f, fuse_ino_t nodeid, const char *name,
char **path, struct node **wnode)
{
return get_path_common(f, nodeid, name, path, wnode);
}
static int try_get_path2(struct fuse *f, fuse_ino_t nodeid1, const char *name1,
fuse_ino_t nodeid2, const char *name2,
char **path1, char **path2,
struct node **wnode1, struct node **wnode2)
{
int err;
/* FIXME: locking two paths needs deadlock checking */
err = try_get_path(f, nodeid1, name1, path1, wnode1, true);
if (!err) {
err = try_get_path(f, nodeid2, name2, path2, wnode2, true);
if (err) {
struct node *wn1 = wnode1 ? *wnode1 : NULL;
unlock_path(f, nodeid1, wn1, NULL);
free(*path1);
}
}
return err;
}
static int get_path2(struct fuse *f, fuse_ino_t nodeid1, const char *name1,
fuse_ino_t nodeid2, const char *name2,
char **path1, char **path2,
struct node **wnode1, struct node **wnode2)
{
int err;
pthread_mutex_lock(&f->lock);
err = try_get_path2(f, nodeid1, name1, nodeid2, name2,
path1, path2, wnode1, wnode2);
if (err == -EAGAIN) {
struct lock_queue_element qe = {
.nodeid1 = nodeid1,
.name1 = name1,
.path1 = path1,
.wnode1 = wnode1,
.nodeid2 = nodeid2,
.name2 = name2,
.path2 = path2,
.wnode2 = wnode2,
};
debug_path(f, "QUEUE PATH1", nodeid1, name1, !!wnode1);
debug_path(f, " PATH2", nodeid2, name2, !!wnode2);
err = wait_path(f, &qe);
debug_path(f, "DEQUEUE PATH1", nodeid1, name1, !!wnode1);
debug_path(f, " PATH2", nodeid2, name2, !!wnode2);
}
pthread_mutex_unlock(&f->lock);
return err;
}
static void free_path_wrlock(struct fuse *f, fuse_ino_t nodeid,
struct node *wnode, char *path)
{
pthread_mutex_lock(&f->lock);
unlock_path(f, nodeid, wnode, NULL);
if (f->lockq)
wake_up_queued(f);
pthread_mutex_unlock(&f->lock);
free(path);
}
static void free_path(struct fuse *f, fuse_ino_t nodeid, char *path)
{
if (path)
free_path_wrlock(f, nodeid, NULL, path);
}
static void free_path2(struct fuse *f, fuse_ino_t nodeid1, fuse_ino_t nodeid2,
struct node *wnode1, struct node *wnode2,
char *path1, char *path2)
{
pthread_mutex_lock(&f->lock);
unlock_path(f, nodeid1, wnode1, NULL);
unlock_path(f, nodeid2, wnode2, NULL);
wake_up_queued(f);
pthread_mutex_unlock(&f->lock);
free(path1);
free(path2);
}
static void forget_node(struct fuse *f, fuse_ino_t nodeid, uint64_t nlookup)
{
struct node *node;
if (nodeid == FUSE_ROOT_ID)
return;
pthread_mutex_lock(&f->lock);
node = get_node(f, nodeid);
/*
* Node may still be locked due to interrupt idiocy in open,
* create and opendir
*/
while (node->nlookup == nlookup && node->treelock) {
struct lock_queue_element qe = {
.nodeid1 = nodeid,
};
debug_path(f, "QUEUE PATH (forget)", nodeid, NULL, false);
queue_path(f, &qe);
do {
pthread_cond_wait(&qe.cond, &f->lock);
} while (node->nlookup == nlookup && node->treelock);
dequeue_path(f, &qe);
debug_path(f, "DEQUEUE_PATH (forget)", nodeid, NULL, false);
}
assert(node->nlookup >= nlookup);
node->nlookup -= nlookup;
if (!node->nlookup) {
unref_node(f, node);
} else if (lru_enabled(f) && node->nlookup == 1) {
set_forget_time(f, node);
}
pthread_mutex_unlock(&f->lock);
}
static void unlink_node(struct fuse *f, struct node *node)
{
if (f->conf.remember) {
assert(node->nlookup > 1);
node->nlookup--;
}
unhash_name(f, node);
}
static void remove_node(struct fuse *f, fuse_ino_t dir, const char *name)
{
struct node *node;
pthread_mutex_lock(&f->lock);
node = lookup_node(f, dir, name);
if (node != NULL)
unlink_node(f, node);
pthread_mutex_unlock(&f->lock);
}
static int rename_node(struct fuse *f, fuse_ino_t olddir, const char *oldname,
fuse_ino_t newdir, const char *newname, int hide)
{
struct node *node;
struct node *newnode;
int err = 0;
pthread_mutex_lock(&f->lock);
node = lookup_node(f, olddir, oldname);
newnode = lookup_node(f, newdir, newname);
if (node == NULL)
goto out;
if (newnode != NULL) {
if (hide) {
fprintf(stderr, "fuse: hidden file got created during hiding\n");
err = -EBUSY;
goto out;
}
unlink_node(f, newnode);
}
unhash_name(f, node);
if (hash_name(f, node, newdir, newname) == -1) {
err = -ENOMEM;
goto out;
}
if (hide)
node->is_hidden = 1;
out:
pthread_mutex_unlock(&f->lock);
return err;
}
static void set_stat(struct fuse *f, fuse_ino_t nodeid, struct stat *stbuf)
{
if (!f->conf.use_ino)
stbuf->st_ino = nodeid;
if (f->conf.set_mode)
stbuf->st_mode = (stbuf->st_mode & S_IFMT) |
(0777 & ~f->conf.umask);
if (f->conf.set_uid)
stbuf->st_uid = f->conf.uid;
if (f->conf.set_gid)
stbuf->st_gid = f->conf.gid;
}
static struct fuse *req_fuse(fuse_req_t req)
{
return (struct fuse *) fuse_req_userdata(req);
}
static void fuse_intr_sighandler(int sig)
{
(void) sig;
/* Nothing to do */
}
struct fuse_intr_data {
pthread_t id;
pthread_cond_t cond;
int finished;
};
static void fuse_interrupt(fuse_req_t req, void *d_)
{
struct fuse_intr_data *d = d_;
struct fuse *f = req_fuse(req);
if (d->id == pthread_self())
return;
pthread_mutex_lock(&f->lock);
while (!d->finished) {
struct timeval now;
struct timespec timeout;
pthread_kill(d->id, f->conf.intr_signal);
gettimeofday(&now, NULL);
timeout.tv_sec = now.tv_sec + 1;
timeout.tv_nsec = now.tv_usec * 1000;
pthread_cond_timedwait(&d->cond, &f->lock, &timeout);
}
pthread_mutex_unlock(&f->lock);
}
static void fuse_do_finish_interrupt(struct fuse *f, fuse_req_t req,
struct fuse_intr_data *d)
{
pthread_mutex_lock(&f->lock);
d->finished = 1;
pthread_cond_broadcast(&d->cond);
pthread_mutex_unlock(&f->lock);
fuse_req_interrupt_func(req, NULL, NULL);
pthread_cond_destroy(&d->cond);
}
static void fuse_do_prepare_interrupt(fuse_req_t req, struct fuse_intr_data *d)
{
d->id = pthread_self();
pthread_cond_init(&d->cond, NULL);
d->finished = 0;
fuse_req_interrupt_func(req, fuse_interrupt, d);
}
static inline void fuse_finish_interrupt(struct fuse *f, fuse_req_t req,
struct fuse_intr_data *d)
{
if (f->conf.intr)
fuse_do_finish_interrupt(f, req, d);
}
static inline void fuse_prepare_interrupt(struct fuse *f, fuse_req_t req,
struct fuse_intr_data *d)
{
if (f->conf.intr)
fuse_do_prepare_interrupt(req, d);
}
#if !defined(__FreeBSD__) && !defined(__NetBSD__)
static int fuse_compat_open(struct fuse_fs *fs, const char *path,
struct fuse_file_info *fi)
{
int err;
if (!fs->compat || fs->compat >= 25)
err = fs->op.open(path, fi);
else if (fs->compat == 22) {
struct fuse_file_info_compat tmp;
memcpy(&tmp, fi, sizeof(tmp));
err = ((struct fuse_operations_compat22 *) &fs->op)->open(path,
&tmp);
memcpy(fi, &tmp, sizeof(tmp));
fi->fh = tmp.fh;
} else
err = ((struct fuse_operations_compat2 *) &fs->op)
->open(path, fi->flags);
return err;
}
static int fuse_compat_release(struct fuse_fs *fs, const char *path,
struct fuse_file_info *fi)
{
if (!fs->compat || fs->compat >= 22)
return fs->op.release(path, fi);
else
return ((struct fuse_operations_compat2 *) &fs->op)
->release(path, fi->flags);
}
static int fuse_compat_opendir(struct fuse_fs *fs, const char *path,
struct fuse_file_info *fi)
{
if (!fs->compat || fs->compat >= 25)
return fs->op.opendir(path, fi);
else {
int err;
struct fuse_file_info_compat tmp;
memcpy(&tmp, fi, sizeof(tmp));
err = ((struct fuse_operations_compat22 *) &fs->op)
->opendir(path, &tmp);
memcpy(fi, &tmp, sizeof(tmp));
fi->fh = tmp.fh;
return err;
}
}
static void convert_statfs_compat(struct fuse_statfs_compat1 *compatbuf,
struct statvfs *stbuf)
{
stbuf->f_bsize = compatbuf->block_size;
stbuf->f_blocks = compatbuf->blocks;
stbuf->f_bfree = compatbuf->blocks_free;
stbuf->f_bavail = compatbuf->blocks_free;
stbuf->f_files = compatbuf->files;
stbuf->f_ffree = compatbuf->files_free;
stbuf->f_namemax = compatbuf->namelen;
}
static void convert_statfs_old(struct statfs *oldbuf, struct statvfs *stbuf)
{
stbuf->f_bsize = oldbuf->f_bsize;
stbuf->f_blocks = oldbuf->f_blocks;
stbuf->f_bfree = oldbuf->f_bfree;
stbuf->f_bavail = oldbuf->f_bavail;
stbuf->f_files = oldbuf->f_files;
stbuf->f_ffree = oldbuf->f_ffree;
stbuf->f_namemax = oldbuf->f_namelen;
}
static int fuse_compat_statfs(struct fuse_fs *fs, const char *path,
struct statvfs *buf)
{
int err;
if (!fs->compat || fs->compat >= 25) {
err = fs->op.statfs(fs->compat == 25 ? "/" : path, buf);
} else if (fs->compat > 11) {
struct statfs oldbuf;
err = ((struct fuse_operations_compat22 *) &fs->op)
->statfs("/", &oldbuf);
if (!err)
convert_statfs_old(&oldbuf, buf);
} else {
struct fuse_statfs_compat1 compatbuf;
memset(&compatbuf, 0, sizeof(struct fuse_statfs_compat1));
err = ((struct fuse_operations_compat1 *) &fs->op)
->statfs(&compatbuf);
if (!err)
convert_statfs_compat(&compatbuf, buf);
}
return err;
}
#else /* __FreeBSD__ || __NetBSD__ */
static inline int fuse_compat_open(struct fuse_fs *fs, char *path,
struct fuse_file_info *fi)
{
return fs->op.open(path, fi);
}
static inline int fuse_compat_release(struct fuse_fs *fs, const char *path,
struct fuse_file_info *fi)
{
return fs->op.release(path, fi);
}
static inline int fuse_compat_opendir(struct fuse_fs *fs, const char *path,
struct fuse_file_info *fi)
{
return fs->op.opendir(path, fi);
}
static inline int fuse_compat_statfs(struct fuse_fs *fs, const char *path,
struct statvfs *buf)
{
return fs->op.statfs(fs->compat == 25 ? "/" : path, buf);
}
#endif /* __FreeBSD__ || __NetBSD__ */
int fuse_fs_getattr(struct fuse_fs *fs, const char *path, struct stat *buf)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.getattr) {
if (fs->debug)
fprintf(stderr, "getattr %s\n", path);
return fs->op.getattr(path, buf);
} else {
return -ENOSYS;
}
}
int fuse_fs_fgetattr(struct fuse_fs *fs, const char *path, struct stat *buf,
struct fuse_file_info *fi)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.fgetattr) {
if (fs->debug)
fprintf(stderr, "fgetattr[%llu] %s\n",
(unsigned long long) fi->fh, path);
return fs->op.fgetattr(path, buf, fi);
} else if (path && fs->op.getattr) {
if (fs->debug)
fprintf(stderr, "getattr %s\n", path);
return fs->op.getattr(path, buf);
} else {
return -ENOSYS;
}
}
int fuse_fs_rename(struct fuse_fs *fs, const char *oldpath,
const char *newpath)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.rename) {
if (fs->debug)
fprintf(stderr, "rename %s %s\n", oldpath, newpath);
return fs->op.rename(oldpath, newpath);
} else {
return -ENOSYS;
}
}
int fuse_fs_unlink(struct fuse_fs *fs, const char *path)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.unlink) {
if (fs->debug)
fprintf(stderr, "unlink %s\n", path);
return fs->op.unlink(path);
} else {
return -ENOSYS;
}
}
int fuse_fs_rmdir(struct fuse_fs *fs, const char *path)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.rmdir) {
if (fs->debug)
fprintf(stderr, "rmdir %s\n", path);
return fs->op.rmdir(path);
} else {
return -ENOSYS;
}
}
int fuse_fs_symlink(struct fuse_fs *fs, const char *linkname, const char *path)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.symlink) {
if (fs->debug)
fprintf(stderr, "symlink %s %s\n", linkname, path);
return fs->op.symlink(linkname, path);
} else {
return -ENOSYS;
}
}
int fuse_fs_link(struct fuse_fs *fs, const char *oldpath, const char *newpath)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.link) {
if (fs->debug)
fprintf(stderr, "link %s %s\n", oldpath, newpath);
return fs->op.link(oldpath, newpath);
} else {
return -ENOSYS;
}
}
int fuse_fs_release(struct fuse_fs *fs, const char *path,
struct fuse_file_info *fi)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.release) {
if (fs->debug)
fprintf(stderr, "release%s[%llu] flags: 0x%x\n",
fi->flush ? "+flush" : "",
(unsigned long long) fi->fh, fi->flags);
return fuse_compat_release(fs, path, fi);
} else {
return 0;
}
}
int fuse_fs_opendir(struct fuse_fs *fs, const char *path,
struct fuse_file_info *fi)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.opendir) {
int err;
if (fs->debug)
fprintf(stderr, "opendir flags: 0x%x %s\n", fi->flags,
path);
err = fuse_compat_opendir(fs, path, fi);
if (fs->debug && !err)
fprintf(stderr, " opendir[%lli] flags: 0x%x %s\n",
(unsigned long long) fi->fh, fi->flags, path);
return err;
} else {
return 0;
}
}
int fuse_fs_open(struct fuse_fs *fs, const char *path,
struct fuse_file_info *fi)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.open) {
int err;
if (fs->debug)
fprintf(stderr, "open flags: 0x%x %s\n", fi->flags,
path);
err = fuse_compat_open(fs, path, fi);
if (fs->debug && !err)
fprintf(stderr, " open[%lli] flags: 0x%x %s\n",
(unsigned long long) fi->fh, fi->flags, path);
return err;
} else {
return 0;
}
}
static void fuse_free_buf(struct fuse_bufvec *buf)
{
if (buf != NULL) {
size_t i;
for (i = 0; i < buf->count; i++)
free(buf->buf[i].mem);
free(buf);
}
}
int fuse_fs_read_buf(struct fuse_fs *fs, const char *path,
struct fuse_bufvec **bufp, size_t size, loff_t off,
struct fuse_file_info *fi)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.read || fs->op.read_buf) {
int res;
if (fs->debug)
fprintf(stderr,
"read[%llu] %zu bytes from %llu flags: 0x%x\n",
(unsigned long long) fi->fh,
size, (unsigned long long) off, fi->flags);
if (fs->op.read_buf) {
res = fs->op.read_buf(path, bufp, size, off, fi);
} else {
struct fuse_bufvec *buf;
void *mem;
buf = malloc(sizeof(struct fuse_bufvec));
if (buf == NULL)
return -ENOMEM;
mem = malloc(size);
if (mem == NULL) {
free(buf);
return -ENOMEM;
}
*buf = FUSE_BUFVEC_INIT(size);
buf->buf[0].mem = mem;
*bufp = buf;
res = fs->op.read(path, mem, size, off, fi);
if (res >= 0)
buf->buf[0].size = res;
}
if (fs->debug && res >= 0)
fprintf(stderr, " read[%llu] %zu bytes from %llu\n",
(unsigned long long) fi->fh,
fuse_buf_size(*bufp),
(unsigned long long) off);
if (res >= 0 && fuse_buf_size(*bufp) > (int) size)
fprintf(stderr, "fuse: read too many bytes\n");
if (res < 0)
return res;
return 0;
} else {
return -ENOSYS;
}
}
int fuse_fs_read(struct fuse_fs *fs, const char *path, char *mem, size_t size,
loff_t off, struct fuse_file_info *fi)
{
int res;
struct fuse_bufvec *buf = NULL;
res = fuse_fs_read_buf(fs, path, &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, const char *path,
struct fuse_bufvec *buf, loff_t off,
struct fuse_file_info *fi)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.write_buf || fs->op.write) {
int res;
size_t size = fuse_buf_size(buf);
assert(buf->idx == 0 && buf->off == 0);
if (fs->debug)
fprintf(stderr,
"write%s[%llu] %zu bytes to %llu flags: 0x%x\n",
fi->writepage ? "page" : "",
(unsigned long long) fi->fh,
size,
(unsigned long long) off,
fi->flags);
if (fs->op.write_buf) {
res = fs->op.write_buf(path, buf, off, fi);
} else {
void *mem = NULL;
struct fuse_buf *flatbuf;
struct fuse_bufvec tmp = FUSE_BUFVEC_INIT(size);
if (buf->count == 1 &&
!(buf->buf[0].flags & FUSE_BUF_IS_FD)) {
flatbuf = &buf->buf[0];
} else {
res = -ENOMEM;
mem = malloc(size);
if (mem == NULL)
goto out;
tmp.buf[0].mem = mem;
res = fuse_buf_copy(&tmp, buf, 0);
if (res <= 0)
goto out_free;
tmp.buf[0].size = res;
flatbuf = &tmp.buf[0];
}
res = fs->op.write(path, flatbuf->mem, flatbuf->size,
off, fi);
out_free:
free(mem);
}
out:
if (fs->debug && res >= 0)
fprintf(stderr, " write%s[%llu] %u bytes to %llu\n",
fi->writepage ? "page" : "",
(unsigned long long) fi->fh, res,
(unsigned long long) off);
if (res > (int) size)
fprintf(stderr, "fuse: wrote too many bytes\n");
return res;
} else {
return -ENOSYS;
}
}
int fuse_fs_write(struct fuse_fs *fs, const char *path, const char *mem,
size_t size, loff_t off, struct fuse_file_info *fi)
{
struct fuse_bufvec bufv = FUSE_BUFVEC_INIT(size);
bufv.buf[0].mem = (void *) mem;
return fuse_fs_write_buf(fs, path, &bufv, off, fi);
}
int fuse_fs_fsync(struct fuse_fs *fs, const char *path, int datasync,
struct fuse_file_info *fi)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.fsync) {
if (fs->debug)
fprintf(stderr, "fsync[%llu] datasync: %i\n",
(unsigned long long) fi->fh, datasync);
return fs->op.fsync(path, datasync, fi);
} else {
return -ENOSYS;
}
}
int fuse_fs_fsyncdir(struct fuse_fs *fs, const char *path, int datasync,
struct fuse_file_info *fi)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.fsyncdir) {
if (fs->debug)
fprintf(stderr, "fsyncdir[%llu] datasync: %i\n",
(unsigned long long) fi->fh, datasync);
return fs->op.fsyncdir(path, datasync, fi);
} else {
return -ENOSYS;
}
}
int fuse_fs_flush(struct fuse_fs *fs, const char *path,
struct fuse_file_info *fi)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.flush) {
if (fs->debug)
fprintf(stderr, "flush[%llu]\n",
(unsigned long long) fi->fh);
return fs->op.flush(path, fi);
} else {
return -ENOSYS;
}
}
int fuse_fs_statfs(struct fuse_fs *fs, const char *path, struct statvfs *buf)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.statfs) {
if (fs->debug)
fprintf(stderr, "statfs %s\n", path);
return fuse_compat_statfs(fs, path, buf);
} else {
buf->f_namemax = 255;
buf->f_bsize = 512;
return 0;
}
}
int fuse_fs_releasedir(struct fuse_fs *fs, const char *path,
struct fuse_file_info *fi)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.releasedir) {
if (fs->debug)
fprintf(stderr, "releasedir[%llu] flags: 0x%x\n",
(unsigned long long) fi->fh, fi->flags);
return fs->op.releasedir(path, fi);
} else {
return 0;
}
}
static int fill_dir_old(struct fuse_dirhandle *dh, const char *name, int type,
ino_t ino)
{
int res;
struct stat stbuf;
memset(&stbuf, 0, sizeof(stbuf));
stbuf.st_mode = type << 12;
stbuf.st_ino = ino;
res = dh->filler(dh->buf, name, &stbuf, 0);
return res ? -ENOMEM : 0;
}
int fuse_fs_readdir(struct fuse_fs *fs, const char *path, void *buf,
fuse_fill_dir_t filler, loff_t off,
struct fuse_file_info *fi)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.readdir) {
if (fs->debug)
fprintf(stderr, "readdir[%llu] from %llu\n",
(unsigned long long) fi->fh,
(unsigned long long) off);
return fs->op.readdir(path, buf, filler, off, fi);
} else if (fs->op.getdir) {
struct fuse_dirhandle dh;
if (fs->debug)
fprintf(stderr, "getdir[%llu]\n",
(unsigned long long) fi->fh);
dh.filler = filler;
dh.buf = buf;
return fs->op.getdir(path, &dh, fill_dir_old);
} else {
return -ENOSYS;
}
}
int fuse_fs_create(struct fuse_fs *fs, const char *path, mode_t mode,
struct fuse_file_info *fi)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.create) {
int err;
if (fs->debug)
fprintf(stderr,
"create flags: 0x%x %s 0%o umask=0%03o\n",
fi->flags, path, mode,
fuse_get_context()->umask);
err = fs->op.create(path, mode, fi);
if (fs->debug && !err)
fprintf(stderr, " create[%llu] flags: 0x%x %s\n",
(unsigned long long) fi->fh, fi->flags, path);
return err;
} else {
return -ENOSYS;
}
}
int fuse_fs_lock(struct fuse_fs *fs, const char *path,
struct fuse_file_info *fi, int cmd, struct flock *lock)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.lock) {
if (fs->debug)
fprintf(stderr, "lock[%llu] %s %s start: %llu len: %llu pid: %llu\n",
(unsigned long long) fi->fh,
(cmd == F_GETLK ? "F_GETLK" :
(cmd == F_SETLK ? "F_SETLK" :
(cmd == F_SETLKW ? "F_SETLKW" : "???"))),
(lock->l_type == F_RDLCK ? "F_RDLCK" :
(lock->l_type == F_WRLCK ? "F_WRLCK" :
(lock->l_type == F_UNLCK ? "F_UNLCK" :
"???"))),
(unsigned long long) lock->l_start,
(unsigned long long) lock->l_len,
(unsigned long long) lock->l_pid);
return fs->op.lock(path, fi, cmd, lock);
} else {
return -ENOSYS;
}
}
int fuse_fs_flock(struct fuse_fs *fs, const char *path,
struct fuse_file_info *fi, int op)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.flock) {
if (fs->debug) {
int xop = op & ~LOCK_NB;
fprintf(stderr, "lock[%llu] %s%s\n",
(unsigned long long) fi->fh,
xop == LOCK_SH ? "LOCK_SH" :
(xop == LOCK_EX ? "LOCK_EX" :
(xop == LOCK_UN ? "LOCK_UN" : "???")),
(op & LOCK_NB) ? "|LOCK_NB" : "");
}
return fs->op.flock(path, fi, op);
} else {
return -ENOSYS;
}
}
int fuse_fs_chown(struct fuse_fs *fs, const char *path, uid_t uid, gid_t gid)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.chown) {
if (fs->debug)
fprintf(stderr, "chown %s %lu %lu\n", path,
(unsigned long) uid, (unsigned long) gid);
return fs->op.chown(path, uid, gid);
} else {
return -ENOSYS;
}
}
int fuse_fs_truncate(struct fuse_fs *fs, const char *path, loff_t size)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.truncate) {
if (fs->debug)
fprintf(stderr, "truncate %s %llu\n", path,
(unsigned long long) size);
return fs->op.truncate(path, size);
} else {
return -ENOSYS;
}
}
int fuse_fs_ftruncate(struct fuse_fs *fs, const char *path, loff_t size,
struct fuse_file_info *fi)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.ftruncate) {
if (fs->debug)
fprintf(stderr, "ftruncate[%llu] %llu\n",
(unsigned long long) fi->fh,
(unsigned long long) size);
return fs->op.ftruncate(path, size, fi);
} else if (path && fs->op.truncate) {
if (fs->debug)
fprintf(stderr, "truncate %s %llu\n", path,
(unsigned long long) size);
return fs->op.truncate(path, size);
} else {
return -ENOSYS;
}
}
int fuse_fs_utimens(struct fuse_fs *fs, const char *path,
const struct timespec tv[2])
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.utimens) {
if (fs->debug)
fprintf(stderr, "utimens %s %li.%09lu %li.%09lu\n",
path, tv[0].tv_sec, tv[0].tv_nsec,
tv[1].tv_sec, tv[1].tv_nsec);
return fs->op.utimens(path, tv);
} else if(fs->op.utime) {
struct utimbuf buf;
if (fs->debug)
fprintf(stderr, "utime %s %li %li\n", path,
tv[0].tv_sec, tv[1].tv_sec);
buf.actime = tv[0].tv_sec;
buf.modtime = tv[1].tv_sec;
return fs->op.utime(path, &buf);
} else {
return -ENOSYS;
}
}
int fuse_fs_access(struct fuse_fs *fs, const char *path, int mask)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.access) {
if (fs->debug)
fprintf(stderr, "access %s 0%o\n", path, mask);
return fs->op.access(path, mask);
} else {
return -ENOSYS;
}
}
int fuse_fs_readlink(struct fuse_fs *fs, const char *path, char *buf,
size_t len)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.readlink) {
if (fs->debug)
fprintf(stderr, "readlink %s %lu\n", path,
(unsigned long) len);
return fs->op.readlink(path, buf, len);
} else {
return -ENOSYS;
}
}
int fuse_fs_mknod(struct fuse_fs *fs, const char *path, mode_t mode,
dev_t rdev)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.mknod) {
if (fs->debug)
fprintf(stderr, "mknod %s 0%o 0x%llx umask=0%03o\n",
path, mode, (unsigned long long) rdev,
fuse_get_context()->umask);
return fs->op.mknod(path, mode, rdev);
} else {
return -ENOSYS;
}
}
int fuse_fs_mkdir(struct fuse_fs *fs, const char *path, mode_t mode)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.mkdir) {
if (fs->debug)
fprintf(stderr, "mkdir %s 0%o umask=0%03o\n",
path, mode, fuse_get_context()->umask);
return fs->op.mkdir(path, mode);
} else {
return -ENOSYS;
}
}
int fuse_fs_setxattr(struct fuse_fs *fs, const char *path, const char *name,
const char *value, size_t size, int flags)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.setxattr) {
if (fs->debug)
fprintf(stderr, "setxattr %s %s %lu 0x%x\n",
path, name, (unsigned long) size, flags);
return fs->op.setxattr(path, name, value, size, flags);
} else {
return -ENOSYS;
}
}
int fuse_fs_getxattr(struct fuse_fs *fs, const char *path, const char *name,
char *value, size_t size)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.getxattr) {
if (fs->debug)
fprintf(stderr, "getxattr %s %s %lu\n",
path, name, (unsigned long) size);
return fs->op.getxattr(path, name, value, size);
} else {
return -ENOSYS;
}
}
int fuse_fs_listxattr(struct fuse_fs *fs, const char *path, char *list,
size_t size)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.listxattr) {
if (fs->debug)
fprintf(stderr, "listxattr %s %lu\n",
path, (unsigned long) size);
return fs->op.listxattr(path, list, size);
} else {
return -ENOSYS;
}
}
int fuse_fs_bmap(struct fuse_fs *fs, const char *path, size_t blocksize,
uint64_t *idx)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.bmap) {
if (fs->debug)
fprintf(stderr, "bmap %s blocksize: %lu index: %llu\n",
path, (unsigned long) blocksize,
(unsigned long long) *idx);
return fs->op.bmap(path, blocksize, idx);
} else {
return -ENOSYS;
}
}
int fuse_fs_removexattr(struct fuse_fs *fs, const char *path, const char *name)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.removexattr) {
if (fs->debug)
fprintf(stderr, "removexattr %s %s\n", path, name);
return fs->op.removexattr(path, name);
} else {
return -ENOSYS;
}
}
int fuse_fs_ioctl(struct fuse_fs *fs, const char *path, int cmd, void *arg,
struct fuse_file_info *fi, unsigned int flags, void *data)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.ioctl) {
if (fs->debug)
fprintf(stderr, "ioctl[%llu] 0x%x flags: 0x%x\n",
(unsigned long long) fi->fh, cmd, flags);
return fs->op.ioctl(path, cmd, arg, fi, flags, data);
} else
return -ENOSYS;
}
int fuse_fs_poll(struct fuse_fs *fs, const char *path,
struct fuse_file_info *fi, struct fuse_pollhandle *ph,
unsigned *reventsp)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.poll) {
int res;
if (fs->debug)
fprintf(stderr, "poll[%llu] ph: %p\n",
(unsigned long long) fi->fh, ph);
res = fs->op.poll(path, fi, ph, reventsp);
if (fs->debug && !res)
fprintf(stderr, " poll[%llu] revents: 0x%x\n",
(unsigned long long) fi->fh, *reventsp);
return res;
} else
return -ENOSYS;
}
int fuse_fs_fallocate(struct fuse_fs *fs, const char *path, int mode,
loff_t offset, loff_t length, struct fuse_file_info *fi)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.fallocate) {
if (fs->debug)
fprintf(stderr, "fallocate %s mode %x, offset: %llu, length: %llu\n",
path,
mode,
(unsigned long long) offset,
(unsigned long long) length);
return fs->op.fallocate(path, mode, offset, length, fi);
} else
return -ENOSYS;
}
static int is_open(struct fuse *f, fuse_ino_t dir, const char *name)
{
struct node *node;
int isopen = 0;
pthread_mutex_lock(&f->lock);
node = lookup_node(f, dir, name);
if (node && node->open_count > 0)
isopen = 1;
pthread_mutex_unlock(&f->lock);
return isopen;
}
static char *hidden_name(struct fuse *f, fuse_ino_t dir, const char *oldname,
char *newname, size_t bufsize)
{
struct stat buf;
struct node *node;
struct node *newnode;
char *newpath;
int res;
int failctr = 10;
do {
pthread_mutex_lock(&f->lock);
node = lookup_node(f, dir, oldname);
if (node == NULL) {
pthread_mutex_unlock(&f->lock);
return NULL;
}
do {
f->hidectr ++;
snprintf(newname, bufsize, ".fuse_hidden%08x%08x",
(unsigned int) node->nodeid, f->hidectr);
newnode = lookup_node(f, dir, newname);
} while(newnode);
res = try_get_path(f, dir, newname, &newpath, NULL, false);
pthread_mutex_unlock(&f->lock);
if (res)
break;
memset(&buf, 0, sizeof(buf));
res = fuse_fs_getattr(f->fs, newpath, &buf);
if (res == -ENOENT)
break;
free(newpath);
newpath = NULL;
} while(res == 0 && --failctr);
return newpath;
}
static int hide_node(struct fuse *f, const char *oldpath,
fuse_ino_t dir, const char *oldname)
{
char newname[64];
char *newpath;
int err = -EBUSY;
newpath = hidden_name(f, dir, oldname, newname, sizeof(newname));
if (newpath) {
err = fuse_fs_rename(f->fs, oldpath, newpath);
if (!err)
err = rename_node(f, dir, oldname, dir, newname, 1);
free(newpath);
}
return err;
}
static int mtime_eq(const struct stat *stbuf, const struct timespec *ts)
{
return stbuf->st_mtime == ts->tv_sec &&
ST_MTIM_NSEC(stbuf) == ts->tv_nsec;
}
#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, const struct stat *stbuf)
{
if (node->cache_valid && (!mtime_eq(stbuf, &node->mtime) ||
stbuf->st_size != node->size))
node->cache_valid = 0;
node->mtime.tv_sec = stbuf->st_mtime;
node->mtime.tv_nsec = ST_MTIM_NSEC(stbuf);
node->size = stbuf->st_size;
curr_time(&node->stat_updated);
}
static int lookup_path(struct fuse *f, fuse_ino_t nodeid,
const char *name, const char *path,
struct fuse_entry_param *e, struct fuse_file_info *fi)
{
int res;
memset(e, 0, sizeof(struct fuse_entry_param));
if (fi)
res = fuse_fs_fgetattr(f->fs, path, &e->attr, fi);
else
res = fuse_fs_getattr(f->fs, path, &e->attr);
if (res == 0) {
struct node *node;
node = find_node(f, nodeid, name);
if (node == NULL)
res = -ENOMEM;
else {
e->ino = node->nodeid;
e->generation = node->generation;
e->entry_timeout = f->conf.entry_timeout;
e->attr_timeout = f->conf.attr_timeout;
if (f->conf.auto_cache) {
pthread_mutex_lock(&f->lock);
update_stat(node, &e->attr);
pthread_mutex_unlock(&f->lock);
}
set_stat(f, e->ino, &e->attr);
if (f->conf.debug)
fprintf(stderr, " NODEID: %lu\n",
(unsigned long) e->ino);
}
}
return res;
}
static struct fuse_context_i *fuse_get_context_internal(void)
{
struct fuse_context_i *c;
c = (struct fuse_context_i *) pthread_getspecific(fuse_context_key);
if (c == NULL) {
c = (struct fuse_context_i *)
calloc(1, sizeof(struct fuse_context_i));
if (c == NULL) {
/* This is hard to deal with properly, so just
abort. If memory is so low that the
context cannot be allocated, there's not
much hope for the filesystem anyway */
fprintf(stderr, "fuse: failed to allocate thread specific data\n");
abort();
}
pthread_setspecific(fuse_context_key, c);
}
return c;
}
static void fuse_freecontext(void *data)
{
free(data);
}
static int fuse_create_context_key(void)
{
int err = 0;
pthread_mutex_lock(&fuse_context_lock);
if (!fuse_context_ref) {
err = pthread_key_create(&fuse_context_key, fuse_freecontext);
if (err) {
fprintf(stderr, "fuse: failed to create thread specific key: %s\n",
strerror(err));
pthread_mutex_unlock(&fuse_context_lock);
return -1;
}
}
fuse_context_ref++;
pthread_mutex_unlock(&fuse_context_lock);
return 0;
}
static void fuse_delete_context_key(void)
{
pthread_mutex_lock(&fuse_context_lock);
fuse_context_ref--;
if (!fuse_context_ref) {
free(pthread_getspecific(fuse_context_key));
pthread_key_delete(fuse_context_key);
}
pthread_mutex_unlock(&fuse_context_lock);
}
static struct fuse *req_fuse_prepare(fuse_req_t req)
{
struct fuse_context_i *c = fuse_get_context_internal();
const struct fuse_ctx *ctx = fuse_req_ctx(req);
c->req = req;
c->ctx.fuse = req_fuse(req);
c->ctx.uid = ctx->uid;
c->ctx.gid = ctx->gid;
c->ctx.pid = ctx->pid;
c->ctx.umask = ctx->umask;
return c->ctx.fuse;
}
static inline void reply_err(fuse_req_t req, int err)
{
/* fuse_reply_err() uses non-negated errno values */
fuse_reply_err(req, -err);
}
static void reply_entry(fuse_req_t req, const struct fuse_entry_param *e,
int err)
{
if (!err) {
struct fuse *f = req_fuse(req);
if (fuse_reply_entry(req, e) == -ENOENT) {
/* Skip forget for negative result */
if (e->ino != 0)
forget_node(f, e->ino, 1);
}
} else
reply_err(req, err);
}
void fuse_fs_init(struct fuse_fs *fs, struct fuse_conn_info *conn)
{
fuse_get_context()->private_data = fs->user_data;
if (!fs->op.write_buf)
conn->want &= ~FUSE_CAP_SPLICE_READ;
if (!fs->op.lock)
conn->want &= ~FUSE_CAP_POSIX_LOCKS;
if (!fs->op.flock)
conn->want &= ~FUSE_CAP_FLOCK_LOCKS;
if (fs->op.init)
fs->user_data = fs->op.init(conn);
}
static void fuse_lib_init(void *data, struct fuse_conn_info *conn)
{
struct fuse *f = (struct fuse *) data;
struct fuse_context_i *c = fuse_get_context_internal();
memset(c, 0, sizeof(*c));
c->ctx.fuse = f;
conn->want |= FUSE_CAP_EXPORT_SUPPORT;
fuse_fs_init(f->fs, conn);
}
void fuse_fs_destroy(struct fuse_fs *fs)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.destroy)
fs->op.destroy(fs->user_data);
#ifdef USE_MODULES
if (fs->m)
fuse_put_module(fs->m);
#endif
free(fs);
}
static void fuse_lib_destroy(void *data)
{
struct fuse *f = (struct fuse *) data;
struct fuse_context_i *c = fuse_get_context_internal();
memset(c, 0, sizeof(*c));
c->ctx.fuse = f;
fuse_fs_destroy(f->fs);
f->fs = NULL;
}
static void fuse_lib_lookup(fuse_req_t req, fuse_ino_t parent,
const char *name)
{
struct fuse *f = req_fuse_prepare(req);
struct fuse_entry_param e;
char *path;
int err;
struct node *dot = NULL;
if (name[0] == '.') {
int len = strlen(name);
if (len == 1 || (name[1] == '.' && len == 2)) {
pthread_mutex_lock(&f->lock);
if (len == 1) {
if (f->conf.debug)
fprintf(stderr, "LOOKUP-DOT\n");
dot = get_node_nocheck(f, parent);
if (dot == NULL) {
pthread_mutex_unlock(&f->lock);
reply_entry(req, &e, -ESTALE);
return;
}
dot->refctr++;
} else {
if (f->conf.debug)
fprintf(stderr, "LOOKUP-DOTDOT\n");
parent = get_node(f, parent)->parent->nodeid;
}
pthread_mutex_unlock(&f->lock);
name = NULL;
}
}
err = get_path_name(f, parent, name, &path);
if (!err) {
struct fuse_intr_data d;
if (f->conf.debug)
fprintf(stderr, "LOOKUP %s\n", path);
fuse_prepare_interrupt(f, req, &d);
err = lookup_path(f, parent, name, path, &e, NULL);
if (err == -ENOENT && f->conf.negative_timeout != 0.0) {
e.ino = 0;
e.entry_timeout = f->conf.negative_timeout;
err = 0;
}
fuse_finish_interrupt(f, req, &d);
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);
}
static void do_forget(struct fuse *f, fuse_ino_t ino, uint64_t nlookup)
{
if (f->conf.debug)
fprintf(stderr, "FORGET %llu/%llu\n", (unsigned long long)ino,
(unsigned long long) nlookup);
forget_node(f, ino, nlookup);
}
static void fuse_lib_forget(fuse_req_t req, fuse_ino_t ino,
unsigned long nlookup)
{
do_forget(req_fuse(req), ino, nlookup);
fuse_reply_none(req);
}
static void fuse_lib_forget_multi(fuse_req_t req, size_t count,
struct fuse_forget_data *forgets)
{
struct fuse *f = req_fuse(req);
size_t i;
for (i = 0; i < count; i++)
do_forget(f, forgets[i].ino, forgets[i].nlookup);
fuse_reply_none(req);
}
static void fuse_lib_getattr(fuse_req_t req, fuse_ino_t ino,
struct fuse_file_info *fi)
{
struct fuse *f = req_fuse_prepare(req);
struct stat buf;
char *path;
int err;
memset(&buf, 0, sizeof(buf));
if (fi != NULL && f->fs->op.fgetattr)
err = get_path_nullok(f, ino, &path);
else
err = get_path(f, ino, &path);
if (!err) {
struct fuse_intr_data d;
fuse_prepare_interrupt(f, req, &d);
if (fi)
err = fuse_fs_fgetattr(f->fs, path, &buf, fi);
else
err = fuse_fs_getattr(f->fs, path, &buf);
fuse_finish_interrupt(f, req, &d);
free_path(f, ino, path);
}
if (!err) {
struct node *node;
pthread_mutex_lock(&f->lock);
node = get_node(f, ino);
if (node->is_hidden && buf.st_nlink > 0)
buf.st_nlink--;
if (f->conf.auto_cache)
update_stat(node, &buf);
pthread_mutex_unlock(&f->lock);
set_stat(f, ino, &buf);
fuse_reply_attr(req, &buf, f->conf.attr_timeout);
} else
reply_err(req, err);
}
int fuse_fs_chmod(struct fuse_fs *fs, const char *path, mode_t mode)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.chmod)
return fs->op.chmod(path, mode);
else
return -ENOSYS;
}
static void fuse_lib_setattr(fuse_req_t req, fuse_ino_t ino, struct stat *attr,
int valid, struct fuse_file_info *fi)
{
struct fuse *f = req_fuse_prepare(req);
struct stat buf;
char *path;
int err;
memset(&buf, 0, sizeof(buf));
if (valid == FUSE_SET_ATTR_SIZE && fi != NULL &&
f->fs->op.ftruncate && f->fs->op.fgetattr)
err = get_path_nullok(f, ino, &path);
else
err = get_path(f, ino, &path);
if (!err) {
struct fuse_intr_data d;
fuse_prepare_interrupt(f, req, &d);
err = 0;
if (!err && (valid & FUSE_SET_ATTR_MODE))
err = fuse_fs_chmod(f->fs, path, attr->st_mode);
if (!err && (valid & (FUSE_SET_ATTR_UID | FUSE_SET_ATTR_GID))) {
uid_t uid = (valid & FUSE_SET_ATTR_UID) ?
attr->st_uid : (uid_t) -1;
gid_t gid = (valid & FUSE_SET_ATTR_GID) ?
attr->st_gid : (gid_t) -1;
err = fuse_fs_chown(f->fs, path, uid, gid);
}
if (!err && (valid & FUSE_SET_ATTR_SIZE)) {
if (fi)
err = fuse_fs_ftruncate(f->fs, path,
attr->st_size, fi);
else
err = fuse_fs_truncate(f->fs, path,
attr->st_size);
}
#ifdef HAVE_UTIMENSAT
if (!err && f->utime_omit_ok &&
(valid & (FUSE_SET_ATTR_ATIME | FUSE_SET_ATTR_MTIME))) {
struct timespec tv[2];
tv[0].tv_sec = 0;
tv[1].tv_sec = 0;
tv[0].tv_nsec = UTIME_OMIT;
tv[1].tv_nsec = UTIME_OMIT;
if (valid & FUSE_SET_ATTR_ATIME_NOW)
tv[0].tv_nsec = UTIME_NOW;
else if (valid & FUSE_SET_ATTR_ATIME)
tv[0] = attr->st_atim;
if (valid & FUSE_SET_ATTR_MTIME_NOW)
tv[1].tv_nsec = UTIME_NOW;
else if (valid & FUSE_SET_ATTR_MTIME)
tv[1] = attr->st_mtim;
err = fuse_fs_utimens(f->fs, path, tv);
} else
#endif
if (!err &&
(valid & (FUSE_SET_ATTR_ATIME | FUSE_SET_ATTR_MTIME)) ==
(FUSE_SET_ATTR_ATIME | FUSE_SET_ATTR_MTIME)) {
struct timespec tv[2];
tv[0].tv_sec = attr->st_atime;
tv[0].tv_nsec = ST_ATIM_NSEC(attr);
tv[1].tv_sec = attr->st_mtime;
tv[1].tv_nsec = ST_MTIM_NSEC(attr);
err = fuse_fs_utimens