mirror of
https://git.code.sf.net/p/ntfs-3g/ntfs-3g.git
synced 2024-11-23 18:14:24 +08:00
ae9aeebbbf
This is backporting code from the full FUSE library in order to support ioctls. The fuse protocol level negociated is now 7.18 instead of 7.8. A fallback protocol to 7.8 is provided for compatibility with older kernels. 32-bit ioctls are not supported by a 64-bit library
3244 lines
86 KiB
C
3244 lines
86 KiB
C
/*
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FUSE: Filesystem in Userspace
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Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
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This program can be distributed under the terms of the GNU LGPLv2.
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See the file COPYING.LIB
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*/
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#ifdef __SOLARIS__
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/* For pthread_rwlock_t */
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#define _GNU_SOURCE
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#endif /* __SOLARIS__ */
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#include "config.h"
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#include "fuse_i.h"
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#include "fuse_lowlevel.h"
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#include "fuse_opt.h"
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#include "fuse_misc.h"
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <time.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <errno.h>
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#include <signal.h>
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#include <dlfcn.h>
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#include <assert.h>
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#include <sys/param.h>
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#include <sys/uio.h>
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#include <sys/time.h>
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#ifdef __SOLARIS__
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#define FUSE_MAX_PATH 4096
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#endif /* __SOLARIS__ */
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#define FUSE_DEFAULT_INTR_SIGNAL SIGUSR1
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#define FUSE_UNKNOWN_INO 0xffffffff
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#define OFFSET_MAX 0x7fffffffffffffffLL
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struct fuse_config {
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unsigned int uid;
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unsigned int gid;
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unsigned int umask;
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double entry_timeout;
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double negative_timeout;
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double attr_timeout;
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double ac_attr_timeout;
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int ac_attr_timeout_set;
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int debug;
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int hard_remove;
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int use_ino;
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int readdir_ino;
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int set_mode;
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int set_uid;
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int set_gid;
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int direct_io;
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int kernel_cache;
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int intr;
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int intr_signal;
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int help;
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#ifdef __SOLARIS__
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int auto_cache;
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char *modules;
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#endif /* __SOLARIS__ */
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};
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struct fuse_fs {
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struct fuse_operations op;
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void *user_data;
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#ifdef __SOLARIS__
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struct fuse_module *m;
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#endif /* __SOLARIS__ */
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};
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#ifdef __SOLARIS__
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struct fusemod_so {
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void *handle;
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int ctr;
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};
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#endif /* __SOLARIS__ */
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struct fuse {
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struct fuse_session *se;
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struct node **name_table;
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size_t name_table_size;
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struct node **id_table;
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size_t id_table_size;
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fuse_ino_t ctr;
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unsigned int generation;
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unsigned int hidectr;
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pthread_mutex_t lock;
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pthread_rwlock_t tree_lock;
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struct fuse_config conf;
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int intr_installed;
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struct fuse_fs *fs;
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};
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struct lock {
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int type;
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off_t start;
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off_t end;
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pid_t pid;
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uint64_t owner;
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struct lock *next;
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};
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struct node {
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struct node *name_next;
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struct node *id_next;
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fuse_ino_t nodeid;
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unsigned int generation;
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int refctr;
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struct node *parent;
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char *name;
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uint64_t nlookup;
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int open_count;
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int is_hidden;
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#ifdef __SOLARIS__
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struct timespec stat_updated;
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struct timespec mtime;
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off_t size;
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int cache_valid;
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#endif /* __SOLARIS__ */
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struct lock *locks;
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};
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struct fuse_dh {
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pthread_mutex_t lock;
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struct fuse *fuse;
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fuse_req_t req;
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char *contents;
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int allocated;
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unsigned len;
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unsigned size;
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unsigned needlen;
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int filled;
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uint64_t fh;
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int error;
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fuse_ino_t nodeid;
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};
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struct fuse_context_i {
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struct fuse_context ctx;
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fuse_req_t req;
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};
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static pthread_key_t fuse_context_key;
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static pthread_mutex_t fuse_context_lock = PTHREAD_MUTEX_INITIALIZER;
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static int fuse_context_ref;
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#ifdef __SOLARIS__
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static struct fusemod_so *fuse_current_so;
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static struct fuse_module *fuse_modules;
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static int fuse_load_so_name(const char *soname)
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{
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struct fusemod_so *so;
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so = calloc(1, sizeof(struct fusemod_so));
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if (!so) {
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fprintf(stderr, "fuse: memory allocation failed\n");
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return -1;
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}
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fuse_current_so = so;
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so->handle = dlopen(soname, RTLD_NOW);
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fuse_current_so = NULL;
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if (!so->handle) {
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fprintf(stderr, "fuse: %s\n", dlerror());
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goto err;
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}
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if (!so->ctr) {
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fprintf(stderr, "fuse: %s did not register any modules", soname);
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goto err;
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}
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return 0;
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err:
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if (so->handle)
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dlclose(so->handle);
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free(so);
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return -1;
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}
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static int fuse_load_so_module(const char *module)
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{
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int res;
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char *soname = malloc(strlen(module) + 64);
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if (!soname) {
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fprintf(stderr, "fuse: memory allocation failed\n");
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return -1;
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}
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sprintf(soname, "libfusemod_%s.so", module);
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res = fuse_load_so_name(soname);
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free(soname);
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return res;
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}
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static struct fuse_module *fuse_find_module(const char *module)
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{
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struct fuse_module *m;
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for (m = fuse_modules; m; m = m->next) {
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if (strcmp(module, m->name) == 0) {
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m->ctr++;
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break;
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}
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}
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return m;
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}
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static struct fuse_module *fuse_get_module(const char *module)
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{
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struct fuse_module *m;
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pthread_mutex_lock(&fuse_context_lock);
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m = fuse_find_module(module);
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if (!m) {
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int err = fuse_load_so_module(module);
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if (!err)
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m = fuse_find_module(module);
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}
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pthread_mutex_unlock(&fuse_context_lock);
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return m;
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}
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static void fuse_put_module(struct fuse_module *m)
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{
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pthread_mutex_lock(&fuse_context_lock);
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assert(m->ctr > 0);
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m->ctr--;
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if (!m->ctr && m->so) {
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struct fusemod_so *so = m->so;
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assert(so->ctr > 0);
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so->ctr--;
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if (!so->ctr) {
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struct fuse_module **mp;
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for (mp = &fuse_modules; *mp;) {
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if ((*mp)->so == so)
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*mp = (*mp)->next;
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else
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mp = &(*mp)->next;
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}
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dlclose(so->handle);
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free(so);
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}
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}
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pthread_mutex_unlock(&fuse_context_lock);
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}
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#endif /* __SOLARIS__ */
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static struct node *get_node_nocheck(struct fuse *f, fuse_ino_t nodeid)
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{
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size_t hash = nodeid % f->id_table_size;
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struct node *node;
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for (node = f->id_table[hash]; node != NULL; node = node->id_next)
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if (node->nodeid == nodeid)
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return node;
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return NULL;
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}
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static struct node *get_node(struct fuse *f, fuse_ino_t nodeid)
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{
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struct node *node = get_node_nocheck(f, nodeid);
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if (!node) {
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fprintf(stderr, "fuse internal error: node %llu not found\n",
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(unsigned long long) nodeid);
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abort();
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}
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return node;
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}
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static void free_node(struct node *node)
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{
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free(node->name);
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free(node);
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}
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static void unhash_id(struct fuse *f, struct node *node)
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{
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size_t hash = node->nodeid % f->id_table_size;
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struct node **nodep = &f->id_table[hash];
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for (; *nodep != NULL; nodep = &(*nodep)->id_next)
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if (*nodep == node) {
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*nodep = node->id_next;
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return;
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}
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}
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static void hash_id(struct fuse *f, struct node *node)
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{
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size_t hash = node->nodeid % f->id_table_size;
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node->id_next = f->id_table[hash];
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f->id_table[hash] = node;
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}
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static unsigned int name_hash(struct fuse *f, fuse_ino_t parent,
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const char *name)
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{
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unsigned int hash = *name;
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if (hash)
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for (name += 1; *name != '\0'; name++)
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hash = (hash << 5) - hash + *name;
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return (hash + parent) % f->name_table_size;
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}
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static void unref_node(struct fuse *f, struct node *node);
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static void unhash_name(struct fuse *f, struct node *node)
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{
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if (node->name) {
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size_t hash = name_hash(f, node->parent->nodeid, node->name);
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struct node **nodep = &f->name_table[hash];
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for (; *nodep != NULL; nodep = &(*nodep)->name_next)
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if (*nodep == node) {
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*nodep = node->name_next;
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node->name_next = NULL;
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unref_node(f, node->parent);
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free(node->name);
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node->name = NULL;
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node->parent = NULL;
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return;
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}
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fprintf(stderr, "fuse internal error: unable to unhash node: %llu\n",
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(unsigned long long) node->nodeid);
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abort();
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}
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}
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static int hash_name(struct fuse *f, struct node *node, fuse_ino_t parentid,
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const char *name)
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{
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size_t hash = name_hash(f, parentid, name);
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struct node *parent = get_node(f, parentid);
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node->name = strdup(name);
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if (node->name == NULL)
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return -1;
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parent->refctr ++;
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node->parent = parent;
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node->name_next = f->name_table[hash];
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f->name_table[hash] = node;
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return 0;
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}
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static void delete_node(struct fuse *f, struct node *node)
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{
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if (f->conf.debug)
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fprintf(stderr, "delete: %llu\n", (unsigned long long) node->nodeid);
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assert(!node->name);
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unhash_id(f, node);
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free_node(node);
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}
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static void unref_node(struct fuse *f, struct node *node)
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{
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assert(node->refctr > 0);
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node->refctr --;
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if (!node->refctr)
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delete_node(f, node);
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}
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static fuse_ino_t next_id(struct fuse *f)
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{
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do {
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f->ctr = (f->ctr + 1) & 0xffffffff;
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if (!f->ctr)
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f->generation ++;
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} while (f->ctr == 0 || f->ctr == FUSE_UNKNOWN_INO ||
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get_node_nocheck(f, f->ctr) != NULL);
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return f->ctr;
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}
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static struct node *lookup_node(struct fuse *f, fuse_ino_t parent,
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const char *name)
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{
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size_t hash = name_hash(f, parent, name);
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struct node *node;
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for (node = f->name_table[hash]; node != NULL; node = node->name_next)
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if (node->parent->nodeid == parent && strcmp(node->name, name) == 0)
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return node;
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return NULL;
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}
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static struct node *find_node(struct fuse *f, fuse_ino_t parent,
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const char *name)
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{
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struct node *node;
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pthread_mutex_lock(&f->lock);
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node = lookup_node(f, parent, name);
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if (node == NULL) {
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node = (struct node *) calloc(1, sizeof(struct node));
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if (node == NULL)
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goto out_err;
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node->refctr = 1;
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node->nodeid = next_id(f);
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node->open_count = 0;
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node->is_hidden = 0;
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node->generation = f->generation;
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if (hash_name(f, node, parent, name) == -1) {
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free(node);
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node = NULL;
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goto out_err;
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}
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hash_id(f, node);
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}
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node->nlookup ++;
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out_err:
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pthread_mutex_unlock(&f->lock);
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return node;
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}
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#ifndef __SOLARIS__
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static char *add_name(char **buf, unsigned *bufsize, char *s, const char *name)
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#else /* __SOLARIS__ */
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static char *add_name(char *buf, char *s, const char *name)
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#endif /* __SOLARIS__ */
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{
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size_t len = strlen(name);
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#ifndef __SOLARIS__
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if (s - len <= *buf) {
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unsigned pathlen = *bufsize - (s - *buf);
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unsigned newbufsize = *bufsize;
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char *newbuf;
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while (newbufsize < pathlen + len + 1) {
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if (newbufsize >= 0x80000000)
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newbufsize = 0xffffffff;
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else
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newbufsize *= 2;
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}
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newbuf = realloc(*buf, newbufsize);
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if (newbuf == NULL)
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return NULL;
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*buf = newbuf;
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s = newbuf + newbufsize - pathlen;
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memmove(s, newbuf + *bufsize - pathlen, pathlen);
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*bufsize = newbufsize;
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}
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s -= len;
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#else /* ! __SOLARIS__ */
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s -= len;
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if (s <= buf) {
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fprintf(stderr, "fuse: path too long: ...%s\n", s + len);
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return NULL;
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}
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#endif /* __SOLARIS__ */
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strncpy(s, name, len);
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s--;
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*s = '/';
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return s;
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}
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static char *get_path_name(struct fuse *f, fuse_ino_t nodeid, const char *name)
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{
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#ifdef __SOLARIS__
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char buf[FUSE_MAX_PATH];
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char *s = buf + FUSE_MAX_PATH - 1;
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struct node *node;
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*s = '\0';
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if (name != NULL) {
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s = add_name(buf, s, name);
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if (s == NULL)
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return NULL;
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}
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|
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pthread_mutex_lock(&f->lock);
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for (node = get_node(f, nodeid); node && node->nodeid != FUSE_ROOT_ID;
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node = node->parent) {
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if (node->name == NULL) {
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s = NULL;
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break;
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}
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|
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s = add_name(buf, s, node->name);
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if (s == NULL)
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break;
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}
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pthread_mutex_unlock(&f->lock);
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|
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if (node == NULL || s == NULL)
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return NULL;
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else if (*s == '\0')
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return strdup("/");
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else
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return strdup(s);
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|
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#else /* __SOLARIS__ */
|
|
|
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unsigned bufsize = 256;
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char *buf;
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char *s;
|
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struct node *node;
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|
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buf = malloc(bufsize);
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if (buf == NULL)
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return NULL;
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|
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s = buf + bufsize - 1;
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*s = '\0';
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|
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if (name != NULL) {
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s = add_name(&buf, &bufsize, s, name);
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if (s == NULL)
|
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goto out_free;
|
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}
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|
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pthread_mutex_lock(&f->lock);
|
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for (node = get_node(f, nodeid); node && node->nodeid != FUSE_ROOT_ID;
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node = node->parent) {
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if (node->name == NULL) {
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s = NULL;
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break;
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}
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|
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s = add_name(&buf, &bufsize, s, node->name);
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if (s == NULL)
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break;
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}
|
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pthread_mutex_unlock(&f->lock);
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|
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if (node == NULL || s == NULL)
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goto out_free;
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|
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if (s[0])
|
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memmove(buf, s, bufsize - (s - buf));
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else
|
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strcpy(buf, "/");
|
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return buf;
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|
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out_free:
|
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free(buf);
|
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return NULL;
|
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#endif /* __SOLARIS__ */
|
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}
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|
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static char *get_path(struct fuse *f, fuse_ino_t nodeid)
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{
|
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return get_path_name(f, nodeid, NULL);
|
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}
|
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|
|
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);
|
|
if (fuse_reply_entry(req, e) == -ENOENT)
|
|
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.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);
|
|
#ifndef __SOLARIS__
|
|
pthread_mutex_destroy(&dh->lock);
|
|
#endif /* ! __SOLARIS__ */
|
|
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\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();
|
|
}
|