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android13/external/ntfs-3g/libfuse-lite/fuse.c

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/*
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
*/
#ifdef __SOLARIS__
/* For pthread_rwlock_t */
#define _GNU_SOURCE
#endif /* __SOLARIS__ */
#include "config.h"
#include "fuse_i.h"
#include "fuse_lowlevel.h"
#include "fuse_opt.h"
#include "fuse_misc.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stddef.h>
#include <unistd.h>
#include <time.h>
#include <fcntl.h>
#include <limits.h>
#include <errno.h>
#include <signal.h>
#include <dlfcn.h>
#include <assert.h>
#include <sys/param.h>
#include <sys/uio.h>
#include <sys/time.h>
#ifdef __SOLARIS__
#define FUSE_MAX_PATH 4096
#endif /* __SOLARIS__ */
#define FUSE_DEFAULT_INTR_SIGNAL SIGUSR1
#define FUSE_UNKNOWN_INO 0xffffffff
#define OFFSET_MAX 0x7fffffffffffffffLL
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 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 intr;
int intr_signal;
int help;
#ifdef __SOLARIS__
int auto_cache;
char *modules;
#endif /* __SOLARIS__ */
};
struct fuse_fs {
struct fuse_operations op;
void *user_data;
#ifdef __SOLARIS__
struct fuse_module *m;
#endif /* __SOLARIS__ */
};
#ifdef __SOLARIS__
struct fusemod_so {
void *handle;
int ctr;
};
#endif /* __SOLARIS__ */
struct fuse {
struct fuse_session *se;
struct node **name_table;
size_t name_table_size;
struct node **id_table;
size_t id_table_size;
fuse_ino_t ctr;
unsigned int generation;
unsigned int hidectr;
pthread_mutex_t lock;
pthread_rwlock_t tree_lock;
struct fuse_config conf;
int intr_installed;
struct fuse_fs *fs;
};
struct lock {
int type;
off_t start;
off_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;
int is_hidden;
#ifdef __SOLARIS__
struct timespec stat_updated;
struct timespec mtime;
off_t size;
int cache_valid;
#endif /* __SOLARIS__ */
struct lock *locks;
};
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;
};
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 __SOLARIS__
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", 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 /* __SOLARIS__ */
static struct node *get_node_nocheck(struct fuse *f, fuse_ino_t nodeid)
{
size_t hash = nodeid % f->id_table_size;
struct node *node;
for (node = f->id_table[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 free_node(struct node *node)
{
free(node->name);
free(node);
}
static void unhash_id(struct fuse *f, struct node *node)
{
size_t hash = node->nodeid % f->id_table_size;
struct node **nodep = &f->id_table[hash];
for (; *nodep != NULL; nodep = &(*nodep)->id_next)
if (*nodep == node) {
*nodep = node->id_next;
return;
}
}
static void hash_id(struct fuse *f, struct node *node)
{
size_t hash = node->nodeid % f->id_table_size;
node->id_next = f->id_table[hash];
f->id_table[hash] = node;
}
static unsigned int name_hash(struct fuse *f, fuse_ino_t parent,
const char *name)
{
unsigned int hash = *name;
if (hash)
for (name += 1; *name != '\0'; name++)
hash = (hash << 5) - hash + *name;
return (hash + parent) % f->name_table_size;
}
static void unref_node(struct fuse *f, struct node *node);
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[hash];
for (; *nodep != NULL; nodep = &(*nodep)->name_next)
if (*nodep == node) {
*nodep = node->name_next;
node->name_next = NULL;
unref_node(f, node->parent);
free(node->name);
node->name = NULL;
node->parent = NULL;
return;
}
fprintf(stderr, "fuse internal error: unable to unhash node: %llu\n",
(unsigned long long) node->nodeid);
abort();
}
}
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);
node->name = strdup(name);
if (node->name == NULL)
return -1;
parent->refctr ++;
node->parent = parent;
node->name_next = f->name_table[hash];
f->name_table[hash] = node;
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->name);
unhash_id(f, node);
free_node(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[hash]; node != NULL; node = node->name_next)
if (node->parent->nodeid == parent && strcmp(node->name, name) == 0)
return node;
return NULL;
}
static struct node *find_node(struct fuse *f, fuse_ino_t parent,
const char *name)
{
struct node *node;
pthread_mutex_lock(&f->lock);
node = lookup_node(f, parent, name);
if (node == NULL) {
node = (struct node *) calloc(1, sizeof(struct node));
if (node == NULL)
goto out_err;
node->refctr = 1;
node->nodeid = next_id(f);
node->open_count = 0;
node->is_hidden = 0;
node->generation = f->generation;
if (hash_name(f, node, parent, name) == -1) {
free(node);
node = NULL;
goto out_err;
}
hash_id(f, node);
}
node->nlookup ++;
out_err:
pthread_mutex_unlock(&f->lock);
return node;
}
#ifndef __SOLARIS__
static char *add_name(char **buf, unsigned *bufsize, char *s, const char *name)
#else /* __SOLARIS__ */
static char *add_name(char *buf, char *s, const char *name)
#endif /* __SOLARIS__ */
{
size_t len = strlen(name);
#ifndef __SOLARIS__
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;
#else /* ! __SOLARIS__ */
s -= len;
if (s <= buf) {
fprintf(stderr, "fuse: path too long: ...%s\n", s + len);
return NULL;
}
#endif /* __SOLARIS__ */
strncpy(s, name, len);
s--;
*s = '/';
return s;
}
static char *get_path_name(struct fuse *f, fuse_ino_t nodeid, const char *name)
{
#ifdef __SOLARIS__
char buf[FUSE_MAX_PATH];
char *s = buf + FUSE_MAX_PATH - 1;
struct node *node;
*s = '\0';
if (name != NULL) {
s = add_name(buf, s, name);
if (s == NULL)
return NULL;
}
pthread_mutex_lock(&f->lock);
for (node = get_node(f, nodeid); node && node->nodeid != FUSE_ROOT_ID;
node = node->parent) {
if (node->name == NULL) {
s = NULL;
break;
}
s = add_name(buf, s, node->name);
if (s == NULL)
break;
}
pthread_mutex_unlock(&f->lock);
if (node == NULL || s == NULL)
return NULL;
else if (*s == '\0')
return strdup("/");
else
return strdup(s);
#else /* __SOLARIS__ */
unsigned bufsize = 256;
char *buf;
char *s;
struct node *node;
buf = malloc(bufsize);
if (buf == NULL)
return NULL;
s = buf + bufsize - 1;
*s = '\0';
if (name != NULL) {
s = add_name(&buf, &bufsize, s, name);
if (s == NULL)
goto out_free;
}
pthread_mutex_lock(&f->lock);
for (node = get_node(f, nodeid); node && node->nodeid != FUSE_ROOT_ID;
node = node->parent) {
if (node->name == NULL) {
s = NULL;
break;
}
s = add_name(&buf, &bufsize, s, node->name);
if (s == NULL)
break;
}
pthread_mutex_unlock(&f->lock);
if (node == NULL || s == NULL)
goto out_free;
if (s[0])
memmove(buf, s, bufsize - (s - buf));
else
strcpy(buf, "/");
return buf;
out_free:
free(buf);
return NULL;
#endif /* __SOLARIS__ */
}
static char *get_path(struct fuse *f, fuse_ino_t nodeid)
{
return get_path_name(f, nodeid, NULL);
}
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);
assert(node->nlookup >= nlookup);
node->nlookup -= nlookup;
if (!node->nlookup) {
unhash_name(f, node);
unref_node(f, node);
}
pthread_mutex_unlock(&f->lock);
}
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)
unhash_name(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;
}
unhash_name(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 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 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);
}
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)
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)
return fs->op.fgetattr(path, buf, fi);
else if (fs->op.getattr)
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)
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)
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)
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)
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)
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)
return fs->op.release(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)
return fs->op.opendir(path, fi);
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)
return fs->op.open(path, fi);
else
return 0;
}
int fuse_fs_read(struct fuse_fs *fs, const char *path, char *buf, size_t size,
off_t off, struct fuse_file_info *fi)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.read)
return fs->op.read(path, buf, size, off, fi);
else
return -ENOSYS;
}
int fuse_fs_write(struct fuse_fs *fs, const char *path, const char *buf,
size_t size, off_t off, struct fuse_file_info *fi)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.write)
return fs->op.write(path, buf, size, off, fi);
else
return -ENOSYS;
}
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)
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)
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)
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)
return fs->op.statfs(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)
return fs->op.releasedir(path, fi);
else
return 0;
}
int fuse_fs_readdir(struct fuse_fs *fs, const char *path, void *buf,
fuse_fill_dir_t filler, off_t off,
struct fuse_file_info *fi)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.readdir)
return fs->op.readdir(path, buf, filler, off, fi);
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)
return fs->op.create(path, mode, fi);
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)
return fs->op.lock(path, fi, cmd, lock);
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)
return fs->op.chown(path, uid, gid);
else
return -ENOSYS;
}
int fuse_fs_truncate(struct fuse_fs *fs, const char *path, off_t size)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.truncate)
return fs->op.truncate(path, size);
else
return -ENOSYS;
}
int fuse_fs_ftruncate(struct fuse_fs *fs, const char *path, off_t size,
struct fuse_file_info *fi)
{
fuse_get_context()->private_data = fs->user_data;
if (fs->op.ftruncate)
return fs->op.ftruncate(path, size, fi);
else if (fs->op.truncate)
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)
return fs->op.utimens(path, tv);
else if(fs->op.utime) {
struct utimbuf buf;
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)
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)
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)
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)
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)
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)
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)
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)
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)
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;
}
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);
pthread_mutex_unlock(&f->lock);
newpath = get_path_name(f, dir, newname);
if (!newpath)
break;
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;
}
#ifdef __SOLARIS__
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);
}
#endif /* __SOLARIS__ */
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;
#ifdef __SOLARIS__
if (f->conf.auto_cache) {
pthread_mutex_lock(&f->lock);
update_stat(node, &e->attr);
pthread_mutex_unlock(&f->lock);
}
#endif /* __SOLARIS__ */
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 *) malloc(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;
#ifdef POSIXACLS
c->ctx.umask = ctx->umask;
#endif
return c->ctx.fuse;
}
#ifndef __SOLARIS__
static void reply_err(fuse_req_t req, int err)
#else /* __SOLARIS__ */
static inline void reply_err(fuse_req_t req, int err)
#endif /* __SOLARIS__ */
{
/* 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);
#ifdef __SOLARIS__
/* Skip forget for negative result */
if ((fuse_reply_entry(req, e) == -ENOENT)
&& (e->ino != 0))
forget_node(f, e->ino, 1);
#else /* __SOLARIS__ */
if (fuse_reply_entry(req, e) == -ENOENT)
forget_node(f, e->ino, 1);
#endif
} 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.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;
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 __SOLARIS__
if (fs->m)
fuse_put_module(fs->m);
#endif /* __SOLARIS__ */
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;
err = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path_name(f, parent, name);
if (path != NULL) {
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);
}
pthread_rwlock_unlock(&f->tree_lock);
reply_entry(req, &e, err);
}
static void fuse_lib_forget(fuse_req_t req, fuse_ino_t ino,
unsigned long nlookup)
{
struct fuse *f = req_fuse(req);
if (f->conf.debug)
fprintf(stderr, "FORGET %llu/%lu\n", (unsigned long long)ino, nlookup);
forget_node(f, ino, 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;
(void) fi;
memset(&buf, 0, sizeof(buf));
err = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path(f, ino);
if (path != NULL) {
struct fuse_intr_data d;
fuse_prepare_interrupt(f, req, &d);
err = fuse_fs_getattr(f->fs, path, &buf);
fuse_finish_interrupt(f, req, &d);
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
if (!err) {
#ifdef __SOLARIS__
if (f->conf.auto_cache) {
pthread_mutex_lock(&f->lock);
update_stat(get_node(f, ino), &buf);
pthread_mutex_unlock(&f->lock);
}
#endif /* __SOLARIS__ */
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;
err = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path(f, ino);
if (path != NULL) {
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 &&
(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(f->fs, path, tv);
}
if (!err)
err = fuse_fs_getattr(f->fs, path, &buf);
fuse_finish_interrupt(f, req, &d);
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
if (!err) {
#ifdef __SOLARIS__
if (f->conf.auto_cache) {
pthread_mutex_lock(&f->lock);
update_stat(get_node(f, ino), &buf);
pthread_mutex_unlock(&f->lock);
}
#endif /* __SOLARIS__ */
set_stat(f, ino, &buf);
fuse_reply_attr(req, &buf, f->conf.attr_timeout);
} else
reply_err(req, err);
}
static void fuse_lib_access(fuse_req_t req, fuse_ino_t ino, int mask)
{
struct fuse *f = req_fuse_prepare(req);
char *path;
int err;
err = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path(f, ino);
if (path != NULL) {
struct fuse_intr_data d;
if (f->conf.debug)
fprintf(stderr, "ACCESS %s 0%o\n", path, mask);
fuse_prepare_interrupt(f, req, &d);
err = fuse_fs_access(f->fs, path, mask);
fuse_finish_interrupt(f, req, &d);
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
reply_err(req, err);
}
static void fuse_lib_readlink(fuse_req_t req, fuse_ino_t ino)
{
struct fuse *f = req_fuse_prepare(req);
char linkname[PATH_MAX + 1];
char *path;
int err;
err = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path(f, ino);
if (path != NULL) {
struct fuse_intr_data d;
fuse_prepare_interrupt(f, req, &d);
err = fuse_fs_readlink(f->fs, path, linkname, sizeof(linkname));
fuse_finish_interrupt(f, req, &d);
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
if (!err) {
linkname[PATH_MAX] = '\0';
fuse_reply_readlink(req, linkname);
} else
reply_err(req, err);
}
static void fuse_lib_mknod(fuse_req_t req, fuse_ino_t parent, const char *name,
mode_t mode, dev_t rdev)
{
struct fuse *f = req_fuse_prepare(req);
struct fuse_entry_param e;
char *path;
int err;
err = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path_name(f, parent, name);
if (path) {
struct fuse_intr_data d;
if (f->conf.debug)
fprintf(stderr, "MKNOD %s\n", path);
fuse_prepare_interrupt(f, req, &d);
err = -ENOSYS;
if (S_ISREG(mode)) {
struct fuse_file_info fi;
memset(&fi, 0, sizeof(fi));
fi.flags = O_CREAT | O_EXCL | O_WRONLY;
err = fuse_fs_create(f->fs, path, mode, &fi);
if (!err) {
err = lookup_path(f, parent, name, path, &e, &fi);
fuse_fs_release(f->fs, path, &fi);
}
}
if (err == -ENOSYS) {
err = fuse_fs_mknod(f->fs, path, mode, rdev);
if (!err)
err = lookup_path(f, parent, name, path, &e, NULL);
}
fuse_finish_interrupt(f, req, &d);
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
reply_entry(req, &e, err);
}
static void fuse_lib_mkdir(fuse_req_t req, fuse_ino_t parent, const char *name,
mode_t mode)
{
struct fuse *f = req_fuse_prepare(req);
struct fuse_entry_param e;
char *path;
int err;
err = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path_name(f, parent, name);
if (path != NULL) {
struct fuse_intr_data d;
if (f->conf.debug)
fprintf(stderr, "MKDIR %s\n", path);
fuse_prepare_interrupt(f, req, &d);
err = fuse_fs_mkdir(f->fs, path, mode);
if (!err)
err = lookup_path(f, parent, name, path, &e, NULL);
fuse_finish_interrupt(f, req, &d);
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
reply_entry(req, &e, err);
}
static void fuse_lib_unlink(fuse_req_t req, fuse_ino_t parent,
const char *name)
{
struct fuse *f = req_fuse_prepare(req);
char *path;
int err;
err = -ENOENT;
pthread_rwlock_wrlock(&f->tree_lock);
path = get_path_name(f, parent, name);
if (path != NULL) {
struct fuse_intr_data d;
if (f->conf.debug)
fprintf(stderr, "UNLINK %s\n", path);
fuse_prepare_interrupt(f, req, &d);
if (!f->conf.hard_remove && is_open(f, parent, name))
err = hide_node(f, path, parent, name);
else {
err = fuse_fs_unlink(f->fs, path);
if (!err)
remove_node(f, parent, name);
}
fuse_finish_interrupt(f, req, &d);
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
reply_err(req, err);
}
static void fuse_lib_rmdir(fuse_req_t req, fuse_ino_t parent, const char *name)
{
struct fuse *f = req_fuse_prepare(req);
char *path;
int err;
err = -ENOENT;
pthread_rwlock_wrlock(&f->tree_lock);
path = get_path_name(f, parent, name);
if (path != NULL) {
struct fuse_intr_data d;
if (f->conf.debug)
fprintf(stderr, "RMDIR %s\n", path);
fuse_prepare_interrupt(f, req, &d);
err = fuse_fs_rmdir(f->fs, path);
fuse_finish_interrupt(f, req, &d);
if (!err)
remove_node(f, parent, name);
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
reply_err(req, err);
}
static void fuse_lib_symlink(fuse_req_t req, const char *linkname,
fuse_ino_t parent, const char *name)
{
struct fuse *f = req_fuse_prepare(req);
struct fuse_entry_param e;
char *path;
int err;
err = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path_name(f, parent, name);
if (path != NULL) {
struct fuse_intr_data d;
if (f->conf.debug)
fprintf(stderr, "SYMLINK %s\n", path);
fuse_prepare_interrupt(f, req, &d);
err = fuse_fs_symlink(f->fs, linkname, path);
if (!err)
err = lookup_path(f, parent, name, path, &e, NULL);
fuse_finish_interrupt(f, req, &d);
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
reply_entry(req, &e, err);
}
static void fuse_lib_rename(fuse_req_t req, fuse_ino_t olddir,
const char *oldname, fuse_ino_t newdir,
const char *newname)
{
struct fuse *f = req_fuse_prepare(req);
char *oldpath;
char *newpath;
int err;
err = -ENOENT;
pthread_rwlock_wrlock(&f->tree_lock);
oldpath = get_path_name(f, olddir, oldname);
if (oldpath != NULL) {
newpath = get_path_name(f, newdir, newname);
if (newpath != NULL) {
struct fuse_intr_data d;
if (f->conf.debug)
fprintf(stderr, "RENAME %s -> %s\n", oldpath, newpath);
err = 0;
fuse_prepare_interrupt(f, req, &d);
if (!f->conf.hard_remove && is_open(f, newdir, newname))
err = hide_node(f, newpath, newdir, newname);
if (!err) {
err = fuse_fs_rename(f->fs, oldpath, newpath);
if (!err)
err = rename_node(f, olddir, oldname, newdir, newname, 0);
}
fuse_finish_interrupt(f, req, &d);
free(newpath);
}
free(oldpath);
}
pthread_rwlock_unlock(&f->tree_lock);
reply_err(req, err);
}
static void fuse_lib_link(fuse_req_t req, fuse_ino_t ino, fuse_ino_t newparent,
const char *newname)
{
struct fuse *f = req_fuse_prepare(req);
struct fuse_entry_param e;
char *oldpath;
char *newpath;
int err;
err = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
oldpath = get_path(f, ino);
if (oldpath != NULL) {
newpath = get_path_name(f, newparent, newname);
if (newpath != NULL) {
struct fuse_intr_data d;
if (f->conf.debug)
fprintf(stderr, "LINK %s\n", newpath);
fuse_prepare_interrupt(f, req, &d);
err = fuse_fs_link(f->fs, oldpath, newpath);
if (!err)
err = lookup_path(f, newparent, newname, newpath, &e, NULL);
fuse_finish_interrupt(f, req, &d);
free(newpath);
}
free(oldpath);
}
pthread_rwlock_unlock(&f->tree_lock);
reply_entry(req, &e, err);
}
static void fuse_do_release(struct fuse *f, fuse_ino_t ino, const char *path,
struct fuse_file_info *fi)
{
struct node *node;
int unlink_hidden = 0;
fuse_fs_release(f->fs, path ? path : "-", fi);
pthread_mutex_lock(&f->lock);
node = get_node(f, ino);
assert(node->open_count > 0);
--node->open_count;
if (node->is_hidden && !node->open_count) {
unlink_hidden = 1;
node->is_hidden = 0;
}
pthread_mutex_unlock(&f->lock);
if(unlink_hidden && path)
fuse_fs_unlink(f->fs, path);
}
static void fuse_lib_create(fuse_req_t req, fuse_ino_t parent,
const char *name, mode_t mode,
struct fuse_file_info *fi)
{
struct fuse *f = req_fuse_prepare(req);
struct fuse_intr_data d;
struct fuse_entry_param e;
char *path;
int err;
err = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path_name(f, parent, name);
if (path) {
fuse_prepare_interrupt(f, req, &d);
err = fuse_fs_create(f->fs, path, mode, fi);
if (!err) {
err = lookup_path(f, parent, name, path, &e, fi);
if (err)
fuse_fs_release(f->fs, path, fi);
else if (!S_ISREG(e.attr.st_mode)) {
err = -EIO;
fuse_fs_release(f->fs, path, fi);
forget_node(f, e.ino, 1);
} else {
if (f->conf.direct_io)
fi->direct_io = 1;
if (f->conf.kernel_cache)
fi->keep_cache = 1;
}
}
fuse_finish_interrupt(f, req, &d);
}
if (!err) {
pthread_mutex_lock(&f->lock);
get_node(f, e.ino)->open_count++;
pthread_mutex_unlock(&f->lock);
if (fuse_reply_create(req, &e, fi) == -ENOENT) {
/* The open syscall was interrupted, so it must be cancelled */
fuse_prepare_interrupt(f, req, &d);
fuse_do_release(f, e.ino, path, fi);
fuse_finish_interrupt(f, req, &d);
forget_node(f, e.ino, 1);
} else if (f->conf.debug) {
fprintf(stderr, " CREATE[%llu] flags: 0x%x %s\n",
(unsigned long long) fi->fh, fi->flags, path);
}
} else
reply_err(req, err);
if (path)
free(path);
pthread_rwlock_unlock(&f->tree_lock);
}
#ifdef __SOLARIS__
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, fuse_ino_t ino, const char *path,
struct fuse_file_info *fi)
{
struct node *node;
pthread_mutex_lock(&f->lock);
node = get_node(f, ino);
if (node->cache_valid) {
struct timespec now;
curr_time(&now);
if (diff_timespec(&now, &node->stat_updated) > f->conf.ac_attr_timeout) {
struct stat stbuf;
int err;
pthread_mutex_unlock(&f->lock);
err = fuse_fs_fgetattr(f->fs, path, &stbuf, fi);
pthread_mutex_lock(&f->lock);
if (!err)
update_stat(node, &stbuf);
else
node->cache_valid = 0;
}
}
if (node->cache_valid)
fi->keep_cache = 1;
node->cache_valid = 1;
pthread_mutex_unlock(&f->lock);
}
#endif /* __SOLARIS__ */
static void fuse_lib_open(fuse_req_t req, fuse_ino_t ino,
struct fuse_file_info *fi)
{
struct fuse *f = req_fuse_prepare(req);
struct fuse_intr_data d;
char *path = NULL;
int err = 0;
err = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path(f, ino);
if (path) {
fuse_prepare_interrupt(f, req, &d);
err = fuse_fs_open(f->fs, path, fi);
if (!err) {
if (f->conf.direct_io)
fi->direct_io = 1;
if (f->conf.kernel_cache)
fi->keep_cache = 1;
#ifdef __SOLARIS__
if (f->conf.auto_cache)
open_auto_cache(f, ino, path, fi);
#endif /* __SOLARIS__ */
}
fuse_finish_interrupt(f, req, &d);
}
if (!err) {
pthread_mutex_lock(&f->lock);
get_node(f, ino)->open_count++;
pthread_mutex_unlock(&f->lock);
if (fuse_reply_open(req, fi) == -ENOENT) {
/* The open syscall was interrupted, so it must be cancelled */
fuse_prepare_interrupt(f, req, &d);
fuse_do_release(f, ino, path, fi);
fuse_finish_interrupt(f, req, &d);
} else if (f->conf.debug) {
fprintf(stderr, "OPEN[%llu] flags: 0x%x %s\n",
(unsigned long long) fi->fh, fi->flags, path);
}
} else
reply_err(req, err);
if (path)
free(path);
pthread_rwlock_unlock(&f->tree_lock);
}
static void fuse_lib_read(fuse_req_t req, fuse_ino_t ino, size_t size,
off_t off, struct fuse_file_info *fi)
{
struct fuse *f = req_fuse_prepare(req);
char *path;
char *buf;
int res;
buf = (char *) malloc(size);
if (buf == NULL) {
reply_err(req, -ENOMEM);
return;
}
res = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path(f, ino);
if (path != NULL) {
struct fuse_intr_data d;
if (f->conf.debug)
fprintf(stderr, "READ[%llu] %lu bytes from %llu\n",
(unsigned long long) fi->fh, (unsigned long) size,
(unsigned long long) off);
fuse_prepare_interrupt(f, req, &d);
res = fuse_fs_read(f->fs, path, buf, size, off, fi);
fuse_finish_interrupt(f, req, &d);
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
if (res >= 0) {
if (f->conf.debug)
fprintf(stderr, " READ[%llu] %u bytes\n",
(unsigned long long)fi->fh, res);
if ((size_t) res > size)
fprintf(stderr, "fuse: read too many bytes");
fuse_reply_buf(req, buf, res);
} else
reply_err(req, res);
free(buf);
}
static void fuse_lib_write(fuse_req_t req, fuse_ino_t ino, const char *buf,
size_t size, off_t off, struct fuse_file_info *fi)
{
struct fuse *f = req_fuse_prepare(req);
char *path;
int res;
res = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path(f, ino);
if (path != NULL) {
struct fuse_intr_data d;
if (f->conf.debug)
fprintf(stderr, "WRITE%s[%llu] %lu bytes to %llu\n",
fi->writepage ? "PAGE" : "", (unsigned long long) fi->fh,
(unsigned long) size, (unsigned long long) off);
fuse_prepare_interrupt(f, req, &d);
res = fuse_fs_write(f->fs, path, buf, size, off, fi);
fuse_finish_interrupt(f, req, &d);
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
if (res >= 0) {
if (f->conf.debug)
fprintf(stderr, " WRITE%s[%llu] %u bytes\n",
fi->writepage ? "PAGE" : "", (unsigned long long) fi->fh,
res);
if ((size_t) res > size)
fprintf(stderr, "fuse: wrote too many bytes");
fuse_reply_write(req, res);
} else
reply_err(req, res);
}
static void fuse_lib_fsync(fuse_req_t req, fuse_ino_t ino, int datasync,
struct fuse_file_info *fi)
{
struct fuse *f = req_fuse_prepare(req);
char *path;
int err;
err = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path(f, ino);
if (path != NULL) {
struct fuse_intr_data d;
if (f->conf.debug)
fprintf(stderr, "FSYNC[%llu]\n", (unsigned long long) fi->fh);
fuse_prepare_interrupt(f, req, &d);
err = fuse_fs_fsync(f->fs, path, datasync, fi);
fuse_finish_interrupt(f, req, &d);
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
reply_err(req, err);
}
static struct fuse_dh *get_dirhandle(const struct fuse_file_info *llfi,
struct fuse_file_info *fi)
{
struct fuse_dh *dh = (struct fuse_dh *) (uintptr_t) llfi->fh;
memset(fi, 0, sizeof(struct fuse_file_info));
fi->fh = dh->fh;
fi->fh_old = dh->fh;
return dh;
}
static void fuse_lib_opendir(fuse_req_t req, fuse_ino_t ino,
struct fuse_file_info *llfi)
{
struct fuse *f = req_fuse_prepare(req);
struct fuse_intr_data d;
struct fuse_dh *dh;
struct fuse_file_info fi;
char *path;
int err;
dh = (struct fuse_dh *) malloc(sizeof(struct fuse_dh));
if (dh == NULL) {
reply_err(req, -ENOMEM);
return;
}
memset(dh, 0, sizeof(struct fuse_dh));
dh->fuse = f;
dh->contents = NULL;
dh->len = 0;
dh->filled = 0;
dh->nodeid = ino;
fuse_mutex_init(&dh->lock);
llfi->fh = (uintptr_t) dh;
memset(&fi, 0, sizeof(fi));
fi.flags = llfi->flags;
err = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path(f, ino);
if (path != NULL) {
fuse_prepare_interrupt(f, req, &d);
err = fuse_fs_opendir(f->fs, path, &fi);
fuse_finish_interrupt(f, req, &d);
dh->fh = fi.fh;
}
if (!err) {
if (fuse_reply_open(req, llfi) == -ENOENT) {
/* The opendir syscall was interrupted, so it must be cancelled */
fuse_prepare_interrupt(f, req, &d);
fuse_fs_releasedir(f->fs, path, &fi);
fuse_finish_interrupt(f, req, &d);
pthread_mutex_destroy(&dh->lock);
free(dh);
}
} else {
reply_err(req, err);
pthread_mutex_destroy(&dh->lock);
free(dh);
}
free(path);
pthread_rwlock_unlock(&f->tree_lock);
}
static int extend_contents(struct fuse_dh *dh, unsigned minsize)
{
if (minsize > dh->size) {
char *newptr;
unsigned newsize = dh->size;
if (!newsize)
newsize = 1024;
#ifndef __SOLARIS__
while (newsize < minsize) {
if (newsize >= 0x80000000)
newsize = 0xffffffff;
else
newsize *= 2;
}
#else /* __SOLARIS__ */
while (newsize < minsize)
newsize *= 2;
#endif /* __SOLARIS__ */
newptr = (char *) realloc(dh->contents, newsize);
if (!newptr) {
dh->error = -ENOMEM;
return -1;
}
dh->contents = newptr;
dh->size = newsize;
}
return 0;
}
static int fill_dir(void *dh_, const char *name, const struct stat *statp,
off_t off)
{
struct fuse_dh *dh = (struct fuse_dh *) dh_;
struct stat stbuf;
size_t newlen;
if (statp)
stbuf = *statp;
else {
memset(&stbuf, 0, sizeof(stbuf));
stbuf.st_ino = FUSE_UNKNOWN_INO;
}
if (!dh->fuse->conf.use_ino) {
stbuf.st_ino = FUSE_UNKNOWN_INO;
if (dh->fuse->conf.readdir_ino) {
struct node *node;
pthread_mutex_lock(&dh->fuse->lock);
node = lookup_node(dh->fuse, dh->nodeid, name);
if (node)
stbuf.st_ino = (ino_t) node->nodeid;
pthread_mutex_unlock(&dh->fuse->lock);
}
}
if (off) {
if (extend_contents(dh, dh->needlen) == -1)
return 1;
dh->filled = 0;
newlen = dh->len + fuse_add_direntry(dh->req, dh->contents + dh->len,
dh->needlen - dh->len, name,
&stbuf, off);
if (newlen > dh->needlen)
return 1;
} else {
newlen = dh->len + fuse_add_direntry(dh->req, NULL, 0, name, NULL, 0);
if (extend_contents(dh, newlen) == -1)
return 1;
fuse_add_direntry(dh->req, dh->contents + dh->len, dh->size - dh->len,
name, &stbuf, newlen);
}
dh->len = newlen;
return 0;
}
static int readdir_fill(struct fuse *f, fuse_req_t req, fuse_ino_t ino,
size_t size, off_t off, struct fuse_dh *dh,
struct fuse_file_info *fi)
{
int err = -ENOENT;
char *path;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path(f, ino);
if (path != NULL) {
struct fuse_intr_data d;
dh->len = 0;
dh->error = 0;
dh->needlen = size;
dh->filled = 1;
dh->req = req;
fuse_prepare_interrupt(f, req, &d);
err = fuse_fs_readdir(f->fs, path, dh, fill_dir, off, fi);
fuse_finish_interrupt(f, req, &d);
dh->req = NULL;
if (!err)
err = dh->error;
if (err)
dh->filled = 0;
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
return err;
}
static void fuse_lib_readdir(fuse_req_t req, fuse_ino_t ino, size_t size,
off_t off, struct fuse_file_info *llfi)
{
struct fuse *f = req_fuse_prepare(req);
struct fuse_file_info fi;
struct fuse_dh *dh = get_dirhandle(llfi, &fi);
pthread_mutex_lock(&dh->lock);
/* According to SUS, directory contents need to be refreshed on
rewinddir() */
if (!off)
dh->filled = 0;
if (!dh->filled) {
int err = readdir_fill(f, req, ino, size, off, dh, &fi);
if (err) {
reply_err(req, err);
goto out;
}
}
if (dh->filled) {
if (off < dh->len) {
if (off + size > dh->len)
size = dh->len - off;
} else
size = 0;
} else {
size = dh->len;
off = 0;
}
fuse_reply_buf(req, dh->contents + off, size);
out:
pthread_mutex_unlock(&dh->lock);
}
static void fuse_lib_releasedir(fuse_req_t req, fuse_ino_t ino,
struct fuse_file_info *llfi)
{
struct fuse *f = req_fuse_prepare(req);
struct fuse_intr_data d;
struct fuse_file_info fi;
struct fuse_dh *dh = get_dirhandle(llfi, &fi);
char *path;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path(f, ino);
fuse_prepare_interrupt(f, req, &d);
fuse_fs_releasedir(f->fs, path ? path : "-", &fi);
fuse_finish_interrupt(f, req, &d);
if (path)
free(path);
pthread_rwlock_unlock(&f->tree_lock);
pthread_mutex_lock(&dh->lock);
pthread_mutex_unlock(&dh->lock);
pthread_mutex_destroy(&dh->lock);
free(dh->contents);
free(dh);
reply_err(req, 0);
}
static void fuse_lib_fsyncdir(fuse_req_t req, fuse_ino_t ino, int datasync,
struct fuse_file_info *llfi)
{
struct fuse *f = req_fuse_prepare(req);
struct fuse_file_info fi;
char *path;
int err;
get_dirhandle(llfi, &fi);
err = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path(f, ino);
if (path != NULL) {
struct fuse_intr_data d;
fuse_prepare_interrupt(f, req, &d);
err = fuse_fs_fsyncdir(f->fs, path, datasync, &fi);
fuse_finish_interrupt(f, req, &d);
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
reply_err(req, err);
}
static void fuse_lib_statfs(fuse_req_t req, fuse_ino_t ino)
{
struct fuse *f = req_fuse_prepare(req);
struct statvfs buf;
char *path;
int err;
memset(&buf, 0, sizeof(buf));
pthread_rwlock_rdlock(&f->tree_lock);
if (!ino) {
err = -ENOMEM;
path = strdup("/");
} else {
err = -ENOENT;
path = get_path(f, ino);
}
if (path) {
struct fuse_intr_data d;
fuse_prepare_interrupt(f, req, &d);
err = fuse_fs_statfs(f->fs, path, &buf);
fuse_finish_interrupt(f, req, &d);
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
if (!err)
fuse_reply_statfs(req, &buf);
else
reply_err(req, err);
}
static void fuse_lib_setxattr(fuse_req_t req, fuse_ino_t ino, const char *name,
const char *value, size_t size, int flags)
{
struct fuse *f = req_fuse_prepare(req);
char *path;
int err;
err = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path(f, ino);
if (path != NULL) {
struct fuse_intr_data d;
fuse_prepare_interrupt(f, req, &d);
err = fuse_fs_setxattr(f->fs, path, name, value, size, flags);
fuse_finish_interrupt(f, req, &d);
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
reply_err(req, err);
}
static int common_getxattr(struct fuse *f, fuse_req_t req, fuse_ino_t ino,
const char *name, char *value, size_t size)
{
int err;
char *path;
err = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path(f, ino);
if (path != NULL) {
struct fuse_intr_data d;
fuse_prepare_interrupt(f, req, &d);
err = fuse_fs_getxattr(f->fs, path, name, value, size);
fuse_finish_interrupt(f, req, &d);
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
return err;
}
static void fuse_lib_getxattr(fuse_req_t req, fuse_ino_t ino, const char *name,
size_t size)
{
struct fuse *f = req_fuse_prepare(req);
int res;
if (size) {
char *value = (char *) malloc(size);
if (value == NULL) {
reply_err(req, -ENOMEM);
return;
}
res = common_getxattr(f, req, ino, name, value, size);
if (res > 0)
fuse_reply_buf(req, value, res);
else
reply_err(req, res);
free(value);
} else {
res = common_getxattr(f, req, ino, name, NULL, 0);
if (res >= 0)
fuse_reply_xattr(req, res);
else
reply_err(req, res);
}
}
static int common_listxattr(struct fuse *f, fuse_req_t req, fuse_ino_t ino,
char *list, size_t size)
{
char *path;
int err;
err = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path(f, ino);
if (path != NULL) {
struct fuse_intr_data d;
fuse_prepare_interrupt(f, req, &d);
err = fuse_fs_listxattr(f->fs, path, list, size);
fuse_finish_interrupt(f, req, &d);
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
return err;
}
static void fuse_lib_listxattr(fuse_req_t req, fuse_ino_t ino, size_t size)
{
struct fuse *f = req_fuse_prepare(req);
int res;
if (size) {
char *list = (char *) malloc(size);
if (list == NULL) {
reply_err(req, -ENOMEM);
return;
}
res = common_listxattr(f, req, ino, list, size);
if (res > 0)
fuse_reply_buf(req, list, res);
else
reply_err(req, res);
free(list);
} else {
res = common_listxattr(f, req, ino, NULL, 0);
if (res >= 0)
fuse_reply_xattr(req, res);
else
reply_err(req, res);
}
}
static void fuse_lib_removexattr(fuse_req_t req, fuse_ino_t ino,
const char *name)
{
struct fuse *f = req_fuse_prepare(req);
char *path;
int err;
err = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path(f, ino);
if (path != NULL) {
struct fuse_intr_data d;
fuse_prepare_interrupt(f, req, &d);
err = fuse_fs_removexattr(f->fs, path, name);
fuse_finish_interrupt(f, req, &d);
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
reply_err(req, err);
}
static struct lock *locks_conflict(struct node *node, const struct lock *lock)
{
struct lock *l;
for (l = node->locks; l; l = l->next)
if (l->owner != lock->owner &&
lock->start <= l->end && l->start <= lock->end &&
(l->type == F_WRLCK || lock->type == F_WRLCK))
break;
return l;
}
static void delete_lock(struct lock **lockp)
{
struct lock *l = *lockp;
*lockp = l->next;
free(l);
}
static void insert_lock(struct lock **pos, struct lock *lock)
{
lock->next = *pos;
*pos = lock;
}
static int locks_insert(struct node *node, struct lock *lock)
{
struct lock **lp;
struct lock *newl1 = NULL;
struct lock *newl2 = NULL;
if (lock->type != F_UNLCK || lock->start != 0 || lock->end != OFFSET_MAX) {
newl1 = malloc(sizeof(struct lock));
newl2 = malloc(sizeof(struct lock));
if (!newl1 || !newl2) {
free(newl1);
free(newl2);
return -ENOLCK;
}
}
for (lp = &node->locks; *lp;) {
struct lock *l = *lp;
if (l->owner != lock->owner)
goto skip;
if (lock->type == l->type) {
if (l->end < lock->start - 1)
goto skip;
if (lock->end < l->start - 1)
break;
if (l->start <= lock->start && lock->end <= l->end)
goto out;
if (l->start < lock->start)
lock->start = l->start;
if (lock->end < l->end)
lock->end = l->end;
goto delete;
} else {
if (l->end < lock->start)
goto skip;
if (lock->end < l->start)
break;
if (lock->start <= l->start && l->end <= lock->end)
goto delete;
if (l->end <= lock->end) {
l->end = lock->start - 1;
goto skip;
}
if (lock->start <= l->start) {
l->start = lock->end + 1;
break;
}
*newl2 = *l;
newl2->start = lock->end + 1;
l->end = lock->start - 1;
insert_lock(&l->next, newl2);
newl2 = NULL;
}
skip:
lp = &l->next;
continue;
delete:
delete_lock(lp);
}
if (lock->type != F_UNLCK) {
*newl1 = *lock;
insert_lock(lp, newl1);
newl1 = NULL;
}
out:
free(newl1);
free(newl2);
return 0;
}
static void flock_to_lock(struct flock *flock, struct lock *lock)
{
memset(lock, 0, sizeof(struct lock));
lock->type = flock->l_type;
lock->start = flock->l_start;
lock->end = flock->l_len ? flock->l_start + flock->l_len - 1 : OFFSET_MAX;
lock->pid = flock->l_pid;
}
static void lock_to_flock(struct lock *lock, struct flock *flock)
{
flock->l_type = lock->type;
flock->l_start = lock->start;
flock->l_len = (lock->end == OFFSET_MAX) ? 0 : lock->end - lock->start + 1;
flock->l_pid = lock->pid;
}
static int fuse_flush_common(struct fuse *f, fuse_req_t req, fuse_ino_t ino,
const char *path, struct fuse_file_info *fi)
{
struct fuse_intr_data d;
struct flock lock;
struct lock l;
int err;
int errlock;
fuse_prepare_interrupt(f, req, &d);
memset(&lock, 0, sizeof(lock));
lock.l_type = F_UNLCK;
lock.l_whence = SEEK_SET;
err = fuse_fs_flush(f->fs, path, fi);
errlock = fuse_fs_lock(f->fs, path, fi, F_SETLK, &lock);
fuse_finish_interrupt(f, req, &d);
if (errlock != -ENOSYS) {
flock_to_lock(&lock, &l);
l.owner = fi->lock_owner;
pthread_mutex_lock(&f->lock);
locks_insert(get_node(f, ino), &l);
pthread_mutex_unlock(&f->lock);
/* if op.lock() is defined FLUSH is needed regardless of op.flush() */
if (err == -ENOSYS)
err = 0;
}
return err;
}
static void fuse_lib_release(fuse_req_t req, fuse_ino_t ino,
struct fuse_file_info *fi)
{
struct fuse *f = req_fuse_prepare(req);
struct fuse_intr_data d;
char *path;
int err = 0;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path(f, ino);
if (f->conf.debug)
fprintf(stderr, "RELEASE%s[%llu] flags: 0x%x\n",
fi->flush ? "+FLUSH" : "",
(unsigned long long) fi->fh, fi->flags);
if (fi->flush) {
err = fuse_flush_common(f, req, ino, path, fi);
if (err == -ENOSYS)
err = 0;
}
fuse_prepare_interrupt(f, req, &d);
fuse_do_release(f, ino, path, fi);
fuse_finish_interrupt(f, req, &d);
free(path);
pthread_rwlock_unlock(&f->tree_lock);
reply_err(req, err);
}
static void fuse_lib_flush(fuse_req_t req, fuse_ino_t ino,
struct fuse_file_info *fi)
{
struct fuse *f = req_fuse_prepare(req);
char *path;
int err;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path(f, ino);
if (path && f->conf.debug)
fprintf(stderr, "FLUSH[%llu]\n", (unsigned long long) fi->fh);
err = fuse_flush_common(f, req, ino, path, fi);
free(path);
pthread_rwlock_unlock(&f->tree_lock);
reply_err(req, err);
}
static int fuse_lock_common(fuse_req_t req, fuse_ino_t ino,
struct fuse_file_info *fi, struct flock *lock,
int cmd)
{
struct fuse *f = req_fuse_prepare(req);
char *path;
int err;
err = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path(f, ino);
if (path != NULL) {
struct fuse_intr_data d;
fuse_prepare_interrupt(f, req, &d);
err = fuse_fs_lock(f->fs, path, fi, cmd, lock);
fuse_finish_interrupt(f, req, &d);
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
return err;
}
static void fuse_lib_getlk(fuse_req_t req, fuse_ino_t ino,
struct fuse_file_info *fi, struct flock *lock)
{
int err;
struct lock l;
struct lock *conflict;
struct fuse *f = req_fuse(req);
flock_to_lock(lock, &l);
l.owner = fi->lock_owner;
pthread_mutex_lock(&f->lock);
conflict = locks_conflict(get_node(f, ino), &l);
if (conflict)
lock_to_flock(conflict, lock);
pthread_mutex_unlock(&f->lock);
if (!conflict)
err = fuse_lock_common(req, ino, fi, lock, F_GETLK);
else
err = 0;
if (!err)
fuse_reply_lock(req, lock);
else
reply_err(req, err);
}
static void fuse_lib_setlk(fuse_req_t req, fuse_ino_t ino,
struct fuse_file_info *fi, struct flock *lock,
int should_sleep)
{
int err = fuse_lock_common(req, ino, fi, lock, should_sleep ? F_SETLKW : F_SETLK);
if (!err) {
struct fuse *f = req_fuse(req);
struct lock l;
flock_to_lock(lock, &l);
l.owner = fi->lock_owner;
pthread_mutex_lock(&f->lock);
locks_insert(get_node(f, ino), &l);
pthread_mutex_unlock(&f->lock);
}
reply_err(req, err);
}
static void fuse_lib_bmap(fuse_req_t req, fuse_ino_t ino, size_t blocksize,
uint64_t idx)
{
struct fuse *f = req_fuse_prepare(req);
struct fuse_intr_data d;
char *path;
int err;
err = -ENOENT;
pthread_rwlock_rdlock(&f->tree_lock);
path = get_path(f, ino);
if (path != NULL) {
fuse_prepare_interrupt(f, req, &d);
err = fuse_fs_bmap(f->fs, path, blocksize, &idx);
fuse_finish_interrupt(f, req, &d);
free(path);
}
pthread_rwlock_unlock(&f->tree_lock);
if (!err)
fuse_reply_bmap(req, idx);
else
reply_err(req, err);
}
static void fuse_lib_ioctl(fuse_req_t req, fuse_ino_t ino, int cmd, void *arg,
struct fuse_file_info *llfi, unsigned int flags,
const void *in_buf, size_t in_bufsz,
size_t out_bufsz)
{
struct fuse *f = req_fuse_prepare(req);
struct fuse_intr_data d;
struct fuse_file_info fi;
char *path, *out_buf = NULL;
int err;
err = -EPERM;
if (flags & FUSE_IOCTL_UNRESTRICTED)
goto err;
if (flags & FUSE_IOCTL_DIR)
get_dirhandle(llfi, &fi);
else
fi = *llfi;
if (out_bufsz) {
err = -ENOMEM;
out_buf = malloc(out_bufsz);
if (!out_buf)
goto err;
}
assert(!in_bufsz || !out_bufsz || in_bufsz == out_bufsz);
if (out_buf)
memcpy(out_buf, in_buf, in_bufsz);
path = get_path(f, ino); /* Should be get_path_nullok() */
if (!path) {
err = ENOENT;
goto err;
}
fuse_prepare_interrupt(f, req, &d);
/* Note : const qualifier dropped */
err = fuse_fs_ioctl(f->fs, path, cmd, arg, &fi, flags,
out_buf ? (void*)out_buf : (void*)(uintptr_t)in_buf);
fuse_finish_interrupt(f, req, &d);
free(path);
fuse_reply_ioctl(req, err, out_buf, out_bufsz);
goto out;
err:
reply_err(req, err);
out:
free(out_buf);
}
static struct fuse_lowlevel_ops fuse_path_ops = {
.init = fuse_lib_init,
.destroy = fuse_lib_destroy,
.lookup = fuse_lib_lookup,
.forget = fuse_lib_forget,
.getattr = fuse_lib_getattr,
.setattr = fuse_lib_setattr,
.access = fuse_lib_access,
.readlink = fuse_lib_readlink,
.mknod = fuse_lib_mknod,
.mkdir = fuse_lib_mkdir,
.unlink = fuse_lib_unlink,
.rmdir = fuse_lib_rmdir,
.symlink = fuse_lib_symlink,
.rename = fuse_lib_rename,
.link = fuse_lib_link,
.create = fuse_lib_create,
.open = fuse_lib_open,
.read = fuse_lib_read,
.write = fuse_lib_write,
.flush = fuse_lib_flush,
.release = fuse_lib_release,
.fsync = fuse_lib_fsync,
.opendir = fuse_lib_opendir,
.readdir = fuse_lib_readdir,
.releasedir = fuse_lib_releasedir,
.fsyncdir = fuse_lib_fsyncdir,
.statfs = fuse_lib_statfs,
.setxattr = fuse_lib_setxattr,
.getxattr = fuse_lib_getxattr,
.listxattr = fuse_lib_listxattr,
.removexattr = fuse_lib_removexattr,
.getlk = fuse_lib_getlk,
.setlk = fuse_lib_setlk,
.bmap = fuse_lib_bmap,
.ioctl = fuse_lib_ioctl,
};
struct fuse_session *fuse_get_session(struct fuse *f)
{
return f->se;
}
int fuse_loop(struct fuse *f)
{
if (f)
return fuse_session_loop(f->se);
else
return -1;
}
void fuse_exit(struct fuse *f)
{
fuse_session_exit(f->se);
}
struct fuse_context *fuse_get_context(void)
{
return &fuse_get_context_internal()->ctx;
}
int fuse_interrupted(void)
{
return fuse_req_interrupted(fuse_get_context_internal()->req);
}
enum {
KEY_HELP,
};
#define FUSE_LIB_OPT(t, p, v) { t, offsetof(struct fuse_config, p), v }
static const struct fuse_opt fuse_lib_opts[] = {
FUSE_OPT_KEY("-h", KEY_HELP),
FUSE_OPT_KEY("--help", KEY_HELP),
FUSE_OPT_KEY("debug", FUSE_OPT_KEY_KEEP),
FUSE_OPT_KEY("-d", FUSE_OPT_KEY_KEEP),
FUSE_LIB_OPT("debug", debug, 1),
FUSE_LIB_OPT("-d", debug, 1),
FUSE_LIB_OPT("hard_remove", hard_remove, 1),
FUSE_LIB_OPT("use_ino", use_ino, 1),
FUSE_LIB_OPT("readdir_ino", readdir_ino, 1),
FUSE_LIB_OPT("direct_io", direct_io, 1),
FUSE_LIB_OPT("kernel_cache", kernel_cache, 1),
#ifdef __SOLARIS__
FUSE_LIB_OPT("auto_cache", auto_cache, 1),
FUSE_LIB_OPT("noauto_cache", auto_cache, 0),
#endif /* __SOLARIS__ */
FUSE_LIB_OPT("umask=", set_mode, 1),
FUSE_LIB_OPT("umask=%o", umask, 0),
FUSE_LIB_OPT("uid=", set_uid, 1),
FUSE_LIB_OPT("uid=%d", uid, 0),
FUSE_LIB_OPT("gid=", set_gid, 1),
FUSE_LIB_OPT("gid=%d", gid, 0),
FUSE_LIB_OPT("entry_timeout=%lf", entry_timeout, 0),
FUSE_LIB_OPT("attr_timeout=%lf", attr_timeout, 0),
FUSE_LIB_OPT("ac_attr_timeout=%lf", ac_attr_timeout, 0),
FUSE_LIB_OPT("ac_attr_timeout=", ac_attr_timeout_set, 1),
FUSE_LIB_OPT("negative_timeout=%lf", negative_timeout, 0),
FUSE_LIB_OPT("intr", intr, 1),
FUSE_LIB_OPT("intr_signal=%d", intr_signal, 0),
#ifdef __SOLARIS__
FUSE_LIB_OPT("modules=%s", modules, 0),
#endif /* __SOLARIS__ */
FUSE_OPT_END
};
static void fuse_lib_help(void)
{
fprintf(stderr,
" -o hard_remove immediate removal (don't hide files)\n"
" -o use_ino let filesystem set inode numbers\n"
" -o readdir_ino try to fill in d_ino in readdir\n"
" -o direct_io use direct I/O\n"
" -o kernel_cache cache files in kernel\n"
#ifdef __SOLARIS__
" -o [no]auto_cache enable caching based on modification times (off)\n"
#endif /* __SOLARIS__ */
" -o umask=M set file permissions (octal)\n"
" -o uid=N set file owner\n"
" -o gid=N set file group\n"
" -o entry_timeout=T cache timeout for names (1.0s)\n"
" -o negative_timeout=T cache timeout for deleted names (0.0s)\n"
" -o attr_timeout=T cache timeout for attributes (1.0s)\n"
" -o ac_attr_timeout=T auto cache timeout for attributes (attr_timeout)\n"
" -o intr allow requests to be interrupted\n"
" -o intr_signal=NUM signal to send on interrupt (%i)\n"
#ifdef __SOLARIS__
" -o modules=M1[:M2...] names of modules to push onto filesystem stack\n"
#endif /* __SOLARIS__ */
"\n", FUSE_DEFAULT_INTR_SIGNAL);
}
#ifdef __SOLARIS__
static void fuse_lib_help_modules(void)
{
struct fuse_module *m;
fprintf(stderr, "\nModule options:\n");
pthread_mutex_lock(&fuse_context_lock);
for (m = fuse_modules; m; m = m->next) {
struct fuse_fs *fs = NULL;
struct fuse_fs *newfs;
struct fuse_args args = FUSE_ARGS_INIT(0, NULL);
if (fuse_opt_add_arg(&args, "") != -1 &&
fuse_opt_add_arg(&args, "-h") != -1) {
fprintf(stderr, "\n[%s]\n", m->name);
newfs = m->factory(&args, &fs);
assert(newfs == NULL);
}
fuse_opt_free_args(&args);
}
pthread_mutex_unlock(&fuse_context_lock);
}
int fuse_is_lib_option(const char *opt)
{
return fuse_lowlevel_is_lib_option(opt) ||
fuse_opt_match(fuse_lib_opts, opt);
}
#endif /* __SOLARIS__ */
static int fuse_lib_opt_proc(void *data, const char *arg, int key,
struct fuse_args *outargs)
{
(void) arg; (void) outargs;
if (key == KEY_HELP) {
struct fuse_config *conf = (struct fuse_config *) data;
fuse_lib_help();
conf->help = 1;
}
return 1;
}
static int fuse_init_intr_signal(int signum, int *installed)
{
struct sigaction old_sa;
if (sigaction(signum, NULL, &old_sa) == -1) {
perror("fuse: cannot get old signal handler");
return -1;
}
if (old_sa.sa_handler == SIG_DFL) {
struct sigaction sa;
memset(&sa, 0, sizeof(struct sigaction));
sa.sa_handler = fuse_intr_sighandler;
sigemptyset(&sa.sa_mask);
if (sigaction(signum, &sa, NULL) == -1) {
perror("fuse: cannot set interrupt signal handler");
return -1;
}
*installed = 1;
}
return 0;
}
static void fuse_restore_intr_signal(int signum)
{
struct sigaction sa;
memset(&sa, 0, sizeof(struct sigaction));
sa.sa_handler = SIG_DFL;
sigaction(signum, &sa, NULL);
}
#ifdef __SOLARIS__
static int fuse_push_module(struct fuse *f, const char *module,
struct fuse_args *args)
{
struct fuse_fs *newfs;
struct fuse_module *m = fuse_get_module(module);
struct fuse_fs *fs[2];
fs[0] = f->fs;
fs[1] = NULL;
if (!m)
return -1;
newfs = m->factory(args, fs);
if (!newfs) {
fuse_put_module(m);
return -1;
}
newfs->m = m;
f->fs = newfs;
return 0;
}
#endif /* __SOLARIS__ */
struct fuse_fs *fuse_fs_new(const struct fuse_operations *op, size_t op_size,
void *user_data)
{
struct fuse_fs *fs;
if (sizeof(struct fuse_operations) < op_size) {
fprintf(stderr, "fuse: warning: library too old, some operations may not not work\n");
op_size = sizeof(struct fuse_operations);
}
fs = (struct fuse_fs *) calloc(1, sizeof(struct fuse_fs));
if (!fs) {
fprintf(stderr, "fuse: failed to allocate fuse_fs object\n");
return NULL;
}
fs->user_data = user_data;
if (op)
memcpy(&fs->op, op, op_size);
return fs;
}
struct fuse *fuse_new(struct fuse_chan *ch, struct fuse_args *args,
const struct fuse_operations *op, size_t op_size,
void *user_data)
{
struct fuse *f;
struct node *root;
struct fuse_fs *fs;
struct fuse_lowlevel_ops llop = fuse_path_ops;
if (fuse_create_context_key() == -1)
goto out;
f = (struct fuse *) calloc(1, sizeof(struct fuse));
if (f == NULL) {
fprintf(stderr, "fuse: failed to allocate fuse object\n");
goto out_delete_context_key;
}
fs = fuse_fs_new(op, op_size, user_data);
if (!fs)
goto out_free;
f->fs = fs;
/* Oh f**k, this is ugly! */
if (!fs->op.lock) {
llop.getlk = NULL;
llop.setlk = NULL;
}
f->conf.entry_timeout = 1.0;
f->conf.attr_timeout = 1.0;
f->conf.negative_timeout = 0.0;
f->conf.intr_signal = FUSE_DEFAULT_INTR_SIGNAL;
if (fuse_opt_parse(args, &f->conf, fuse_lib_opts, fuse_lib_opt_proc) == -1)
goto out_free_fs;
#ifdef __SOLARIS__
if (f->conf.modules) {
char *module;
char *next;
for (module = f->conf.modules; module; module = next) {
char *p;
for (p = module; *p && *p != ':'; p++);
next = *p ? p + 1 : NULL;
*p = '\0';
if (module[0] && fuse_push_module(f, module, args) == -1)
goto out_free_fs;
}
}
#endif /* __SOLARIS__ */
if (!f->conf.ac_attr_timeout_set)
f->conf.ac_attr_timeout = f->conf.attr_timeout;
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
/*
* In FreeBSD, we always use these settings as inode numbers are needed to
* make getcwd(3) work.
*/
f->conf.readdir_ino = 1;
#endif
f->se = fuse_lowlevel_new(args, &llop, sizeof(llop), f);
if (f->se == NULL) {
#ifdef __SOLARIS__
if (f->conf.help)
fuse_lib_help_modules();
#endif /* __SOLARIS__ */
goto out_free_fs;
}
fuse_session_add_chan(f->se, ch);
f->ctr = 0;
f->generation = 0;
/* FIXME: Dynamic hash table */
f->name_table_size = 14057;
f->name_table = (struct node **)
calloc(1, sizeof(struct node *) * f->name_table_size);
if (f->name_table == NULL) {
fprintf(stderr, "fuse: memory allocation failed\n");
goto out_free_session;
}
f->id_table_size = 14057;
f->id_table = (struct node **)
calloc(1, sizeof(struct node *) * f->id_table_size);
if (f->id_table == NULL) {
fprintf(stderr, "fuse: memory allocation failed\n");
goto out_free_name_table;
}
fuse_mutex_init(&f->lock);
pthread_rwlock_init(&f->tree_lock, NULL);
root = (struct node *) calloc(1, sizeof(struct node));
if (root == NULL) {
fprintf(stderr, "fuse: memory allocation failed\n");
goto out_free_id_table;
}
root->name = strdup("/");
if (root->name == NULL) {
fprintf(stderr, "fuse: memory allocation failed\n");
goto out_free_root;
}
if (f->conf.intr &&
fuse_init_intr_signal(f->conf.intr_signal, &f->intr_installed) == -1)
goto out_free_root_name;
root->parent = NULL;
root->nodeid = FUSE_ROOT_ID;
root->generation = 0;
root->refctr = 1;
root->nlookup = 1;
hash_id(f, root);
return f;
out_free_root_name:
free(root->name);
out_free_root:
free(root);
out_free_id_table:
free(f->id_table);
out_free_name_table:
free(f->name_table);
out_free_session:
fuse_session_destroy(f->se);
out_free_fs:
/* Horrible compatibility hack to stop the destructor from being
called on the filesystem without init being called first */
fs->op.destroy = NULL;
fuse_fs_destroy(f->fs);
#ifdef __SOLARIS__
free(f->conf.modules);
#endif /* __SOLARIS__ */
out_free:
free(f);
out_delete_context_key:
fuse_delete_context_key();
out:
return NULL;
}
void fuse_destroy(struct fuse *f)
{
size_t i;
if (f->conf.intr && f->intr_installed)
fuse_restore_intr_signal(f->conf.intr_signal);
if (f->fs) {
struct fuse_context_i *c = fuse_get_context_internal();
memset(c, 0, sizeof(*c));
c->ctx.fuse = f;
for (i = 0; i < f->id_table_size; i++) {
struct node *node;
for (node = f->id_table[i]; node != NULL; node = node->id_next) {
if (node->is_hidden) {
char *path = get_path(f, node->nodeid);
if (path) {
fuse_fs_unlink(f->fs, path);
free(path);
}
}
}
}
}
for (i = 0; i < f->id_table_size; i++) {
struct node *node;
struct node *next;
for (node = f->id_table[i]; node != NULL; node = next) {
next = node->id_next;
free_node(node);
}
}
free(f->id_table);
free(f->name_table);
pthread_mutex_destroy(&f->lock);
pthread_rwlock_destroy(&f->tree_lock);
fuse_session_destroy(f->se);
#ifdef __SOLARIS__
free(f->conf.modules);
#endif /* __SOLARIS__ */
free(f);
fuse_delete_context_key();
}
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