| /* |
| FUSE: Filesystem in Userspace |
| Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu> |
| |
| This program can be distributed under the terms of the GNU LGPL. |
| See the file COPYING.LIB |
| */ |
| |
| |
| /* For pthread_rwlock_t */ |
| #define _GNU_SOURCE |
| |
| #include "fuse_i.h" |
| #include "fuse_lowlevel.h" |
| #include "fuse_opt.h" |
| #include "fuse_misc.h" |
| #include "fuse_common_compat.h" |
| #include "fuse_compat.h" |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include <stddef.h> |
| #include <unistd.h> |
| #include <time.h> |
| #include <fcntl.h> |
| #include <limits.h> |
| #include <errno.h> |
| #include <signal.h> |
| #include <dlfcn.h> |
| #include <assert.h> |
| #include <sys/param.h> |
| #include <sys/uio.h> |
| #include <sys/time.h> |
| |
| #define FUSE_MAX_PATH 4096 |
| #define FUSE_DEFAULT_INTR_SIGNAL SIGUSR1 |
| |
| #define FUSE_UNKNOWN_INO 0xffffffff |
| #define OFFSET_MAX 0x7fffffffffffffffLL |
| |
| struct fuse_config { |
| unsigned int uid; |
| unsigned int gid; |
| unsigned int umask; |
| double entry_timeout; |
| double negative_timeout; |
| double attr_timeout; |
| double ac_attr_timeout; |
| int ac_attr_timeout_set; |
| int debug; |
| int hard_remove; |
| int use_ino; |
| int readdir_ino; |
| int set_mode; |
| int set_uid; |
| int set_gid; |
| int direct_io; |
| int kernel_cache; |
| int auto_cache; |
| int intr; |
| int intr_signal; |
| int help; |
| char *modules; |
| }; |
| |
| struct fuse_fs { |
| struct fuse_operations op; |
| struct fuse_module *m; |
| void *user_data; |
| int compat; |
| }; |
| |
| struct fusemod_so { |
| void *handle; |
| int ctr; |
| }; |
| |
| struct fuse { |
| struct fuse_session *se; |
| struct node **name_table; |
| size_t name_table_size; |
| struct node **id_table; |
| size_t id_table_size; |
| fuse_ino_t ctr; |
| unsigned int generation; |
| unsigned int hidectr; |
| pthread_mutex_t lock; |
| pthread_rwlock_t tree_lock; |
| struct fuse_config conf; |
| int intr_installed; |
| struct fuse_fs *fs; |
| }; |
| |
| struct lock { |
| int type; |
| off_t start; |
| off_t end; |
| pid_t pid; |
| uint64_t owner; |
| struct lock *next; |
| }; |
| |
| struct node { |
| struct node *name_next; |
| struct node *id_next; |
| fuse_ino_t nodeid; |
| unsigned int generation; |
| int refctr; |
| fuse_ino_t parent; |
| char *name; |
| uint64_t nlookup; |
| int open_count; |
| int is_hidden; |
| struct timespec stat_updated; |
| struct timespec mtime; |
| off_t size; |
| int cache_valid; |
| struct lock *locks; |
| }; |
| |
| struct fuse_dh { |
| pthread_mutex_t lock; |
| struct fuse *fuse; |
| fuse_req_t req; |
| char *contents; |
| int allocated; |
| unsigned len; |
| unsigned size; |
| unsigned needlen; |
| int filled; |
| uint64_t fh; |
| int error; |
| fuse_ino_t nodeid; |
| }; |
| |
| /* old dir handle */ |
| struct fuse_dirhandle { |
| fuse_fill_dir_t filler; |
| void *buf; |
| }; |
| |
| struct fuse_context_i { |
| struct fuse_context ctx; |
| fuse_req_t req; |
| }; |
| |
| static pthread_key_t fuse_context_key; |
| static pthread_mutex_t fuse_context_lock = PTHREAD_MUTEX_INITIALIZER; |
| static int fuse_context_ref; |
| static struct fusemod_so *fuse_current_so; |
| static struct fuse_module *fuse_modules; |
| |
| static int fuse_load_so_name(const char *soname) |
| { |
| struct fusemod_so *so; |
| |
| so = calloc(1, sizeof(struct fusemod_so)); |
| if (!so) { |
| fprintf(stderr, "fuse: memory allocation failed\n"); |
| return -1; |
| } |
| |
| pthread_mutex_lock(&fuse_context_lock); |
| fuse_current_so = so; |
| so->handle = dlopen(soname, RTLD_NOW); |
| fuse_current_so = NULL; |
| pthread_mutex_unlock(&fuse_context_lock); |
| if (!so->handle) { |
| fprintf(stderr, "fuse: %s\n", dlerror()); |
| goto err; |
| } |
| if (!so->ctr) { |
| fprintf(stderr, "fuse: %s did not register any modules", soname); |
| goto err; |
| } |
| return 0; |
| |
| err: |
| if (so->handle) |
| dlclose(so->handle); |
| free(so); |
| return -1; |
| } |
| |
| static int fuse_load_so_module(const char *module) |
| { |
| int res; |
| char *soname = malloc(strlen(module) + 64); |
| if (!soname) { |
| fprintf(stderr, "fuse: memory allocation failed\n"); |
| return -1; |
| } |
| if (soname) |
| sprintf(soname, "libfusemod_%s.so", module); |
| |
| res = fuse_load_so_name(soname); |
| free(soname); |
| return res; |
| } |
| |
| static struct fuse_module *fuse_find_module(const char *module) |
| { |
| struct fuse_module *m; |
| for (m = fuse_modules; m; m = m->next) { |
| if (strcmp(module, m->name) == 0) { |
| m->ctr++; |
| break; |
| } |
| } |
| return m; |
| } |
| |
| static struct fuse_module *fuse_get_module(const char *module) |
| { |
| struct fuse_module *m; |
| |
| pthread_mutex_lock(&fuse_context_lock); |
| m = fuse_find_module(module); |
| if (!m) { |
| int err = fuse_load_so_module(module); |
| if (!err) |
| m = fuse_find_module(module); |
| } |
| pthread_mutex_unlock(&fuse_context_lock); |
| return m; |
| } |
| |
| static void fuse_put_module(struct fuse_module *m) |
| { |
| pthread_mutex_lock(&fuse_context_lock); |
| assert(m->ctr > 0); |
| m->ctr--; |
| if (!m->ctr && m->so) { |
| struct fusemod_so *so = m->so; |
| assert(so->ctr > 0); |
| so->ctr--; |
| if (!so->ctr) { |
| struct fuse_module **mp; |
| for (mp = &fuse_modules; *mp;) { |
| if ((*mp)->so == so) |
| *mp = (*mp)->next; |
| else |
| mp = &(*mp)->next; |
| } |
| dlclose(so->handle); |
| free(so); |
| } |
| } |
| pthread_mutex_unlock(&fuse_context_lock); |
| } |
| |
| static struct node *get_node_nocheck(struct fuse *f, fuse_ino_t nodeid) |
| { |
| size_t hash = nodeid % f->id_table_size; |
| struct node *node; |
| |
| for (node = f->id_table[hash]; node != NULL; node = node->id_next) |
| if (node->nodeid == nodeid) |
| return node; |
| |
| return NULL; |
| } |
| |
| static struct node *get_node(struct fuse *f, fuse_ino_t nodeid) |
| { |
| struct node *node = get_node_nocheck(f, nodeid); |
| if (!node) { |
| fprintf(stderr, "fuse internal error: node %llu not found\n", |
| (unsigned long long) nodeid); |
| abort(); |
| } |
| return node; |
| } |
| |
| static void free_node(struct node *node) |
| { |
| free(node->name); |
| free(node); |
| } |
| |
| static void unhash_id(struct fuse *f, struct node *node) |
| { |
| size_t hash = node->nodeid % f->id_table_size; |
| struct node **nodep = &f->id_table[hash]; |
| |
| for (; *nodep != NULL; nodep = &(*nodep)->id_next) |
| if (*nodep == node) { |
| *nodep = node->id_next; |
| return; |
| } |
| } |
| |
| static void hash_id(struct fuse *f, struct node *node) |
| { |
| size_t hash = node->nodeid % f->id_table_size; |
| node->id_next = f->id_table[hash]; |
| f->id_table[hash] = node; |
| } |
| |
| static unsigned int name_hash(struct fuse *f, fuse_ino_t parent, |
| const char *name) |
| { |
| unsigned int hash = *name; |
| |
| if (hash) |
| for (name += 1; *name != '\0'; name++) |
| hash = (hash << 5) - hash + *name; |
| |
| return (hash + parent) % f->name_table_size; |
| } |
| |
| static void unref_node(struct fuse *f, struct node *node); |
| |
| static void unhash_name(struct fuse *f, struct node *node) |
| { |
| if (node->name) { |
| size_t hash = name_hash(f, node->parent, node->name); |
| struct node **nodep = &f->name_table[hash]; |
| |
| for (; *nodep != NULL; nodep = &(*nodep)->name_next) |
| if (*nodep == node) { |
| *nodep = node->name_next; |
| node->name_next = NULL; |
| unref_node(f, get_node(f, node->parent)); |
| free(node->name); |
| node->name = NULL; |
| node->parent = 0; |
| return; |
| } |
| fprintf(stderr, "fuse internal error: unable to unhash node: %llu\n", |
| (unsigned long long) node->nodeid); |
| abort(); |
| } |
| } |
| |
| static int hash_name(struct fuse *f, struct node *node, fuse_ino_t parent, |
| const char *name) |
| { |
| size_t hash = name_hash(f, parent, name); |
| node->name = strdup(name); |
| if (node->name == NULL) |
| return -1; |
| |
| get_node(f, parent)->refctr ++; |
| node->parent = parent; |
| node->name_next = f->name_table[hash]; |
| f->name_table[hash] = node; |
| return 0; |
| } |
| |
| static void delete_node(struct fuse *f, struct node *node) |
| { |
| if (f->conf.debug) { |
| printf("delete: %llu\n", (unsigned long long) node->nodeid); |
| fflush(stdout); |
| } |
| assert(!node->name); |
| unhash_id(f, node); |
| free_node(node); |
| } |
| |
| static void unref_node(struct fuse *f, struct node *node) |
| { |
| assert(node->refctr > 0); |
| node->refctr --; |
| if (!node->refctr) |
| delete_node(f, node); |
| } |
| |
| static fuse_ino_t next_id(struct fuse *f) |
| { |
| do { |
| f->ctr = (f->ctr + 1) & 0xffffffff; |
| if (!f->ctr) |
| f->generation ++; |
| } while (f->ctr == 0 || f->ctr == FUSE_UNKNOWN_INO || |
| get_node_nocheck(f, f->ctr) != NULL); |
| return f->ctr; |
| } |
| |
| static struct node *lookup_node(struct fuse *f, fuse_ino_t parent, |
| const char *name) |
| { |
| size_t hash = name_hash(f, parent, name); |
| struct node *node; |
| |
| for (node = f->name_table[hash]; node != NULL; node = node->name_next) |
| if (node->parent == parent && strcmp(node->name, name) == 0) |
| return node; |
| |
| return NULL; |
| } |
| |
| static struct node *find_node(struct fuse *f, fuse_ino_t parent, |
| const char *name) |
| { |
| struct node *node; |
| |
| pthread_mutex_lock(&f->lock); |
| node = lookup_node(f, parent, name); |
| if (node == NULL) { |
| node = (struct node *) calloc(1, sizeof(struct node)); |
| if (node == NULL) |
| goto out_err; |
| |
| node->refctr = 1; |
| node->nodeid = next_id(f); |
| node->open_count = 0; |
| node->is_hidden = 0; |
| node->generation = f->generation; |
| if (hash_name(f, node, parent, name) == -1) { |
| free(node); |
| node = NULL; |
| goto out_err; |
| } |
| hash_id(f, node); |
| } |
| node->nlookup ++; |
| out_err: |
| pthread_mutex_unlock(&f->lock); |
| return node; |
| } |
| |
| static char *add_name(char *buf, char *s, const char *name) |
| { |
| size_t len = strlen(name); |
| s -= len; |
| if (s <= buf) { |
| fprintf(stderr, "fuse: path too long: ...%s\n", s + len); |
| return NULL; |
| } |
| strncpy(s, name, len); |
| s--; |
| *s = '/'; |
| |
| return s; |
| } |
| |
| static char *get_path_name(struct fuse *f, fuse_ino_t nodeid, const char *name) |
| { |
| char buf[FUSE_MAX_PATH]; |
| char *s = buf + FUSE_MAX_PATH - 1; |
| struct node *node; |
| |
| *s = '\0'; |
| |
| if (name != NULL) { |
| s = add_name(buf, s, name); |
| if (s == NULL) |
| return NULL; |
| } |
| |
| pthread_mutex_lock(&f->lock); |
| for (node = get_node(f, nodeid); node && node->nodeid != FUSE_ROOT_ID; |
| node = get_node(f, node->parent)) { |
| if (node->name == NULL) { |
| s = NULL; |
| break; |
| } |
| |
| s = add_name(buf, s, node->name); |
| if (s == NULL) |
| break; |
| } |
| pthread_mutex_unlock(&f->lock); |
| |
| if (node == NULL || s == NULL) |
| return NULL; |
| else if (*s == '\0') |
| return strdup("/"); |
| else |
| return strdup(s); |
| } |
| |
| static char *get_path(struct fuse *f, fuse_ino_t nodeid) |
| { |
| return get_path_name(f, nodeid, NULL); |
| } |
| |
| static void forget_node(struct fuse *f, fuse_ino_t nodeid, uint64_t nlookup) |
| { |
| struct node *node; |
| if (nodeid == FUSE_ROOT_ID) |
| return; |
| pthread_mutex_lock(&f->lock); |
| node = get_node(f, nodeid); |
| assert(node->nlookup >= nlookup); |
| node->nlookup -= nlookup; |
| if (!node->nlookup) { |
| unhash_name(f, node); |
| unref_node(f, node); |
| } |
| pthread_mutex_unlock(&f->lock); |
| } |
| |
| static void remove_node(struct fuse *f, fuse_ino_t dir, const char *name) |
| { |
| struct node *node; |
| |
| pthread_mutex_lock(&f->lock); |
| node = lookup_node(f, dir, name); |
| if (node != NULL) |
| unhash_name(f, node); |
| pthread_mutex_unlock(&f->lock); |
| } |
| |
| static int rename_node(struct fuse *f, fuse_ino_t olddir, const char *oldname, |
| fuse_ino_t newdir, const char *newname, int hide) |
| { |
| struct node *node; |
| struct node *newnode; |
| int err = 0; |
| |
| pthread_mutex_lock(&f->lock); |
| node = lookup_node(f, olddir, oldname); |
| newnode = lookup_node(f, newdir, newname); |
| if (node == NULL) |
| goto out; |
| |
| if (newnode != NULL) { |
| if (hide) { |
| fprintf(stderr, "fuse: hidden file got created during hiding\n"); |
| err = -EBUSY; |
| goto out; |
| } |
| unhash_name(f, newnode); |
| } |
| |
| unhash_name(f, node); |
| if (hash_name(f, node, newdir, newname) == -1) { |
| err = -ENOMEM; |
| goto out; |
| } |
| |
| if (hide) |
| node->is_hidden = 1; |
| |
| out: |
| pthread_mutex_unlock(&f->lock); |
| return err; |
| } |
| |
| static void set_stat(struct fuse *f, fuse_ino_t nodeid, struct stat *stbuf) |
| { |
| if (!f->conf.use_ino) |
| stbuf->st_ino = nodeid; |
| if (f->conf.set_mode) |
| stbuf->st_mode = (stbuf->st_mode & S_IFMT) | (0777 & ~f->conf.umask); |
| if (f->conf.set_uid) |
| stbuf->st_uid = f->conf.uid; |
| if (f->conf.set_gid) |
| stbuf->st_gid = f->conf.gid; |
| } |
| |
| static struct fuse *req_fuse(fuse_req_t req) |
| { |
| return (struct fuse *) fuse_req_userdata(req); |
| } |
| |
| static void fuse_intr_sighandler(int sig) |
| { |
| (void) sig; |
| /* Nothing to do */ |
| } |
| |
| struct fuse_intr_data { |
| pthread_t id; |
| pthread_cond_t cond; |
| int finished; |
| }; |
| |
| static void fuse_interrupt(fuse_req_t req, void *d_) |
| { |
| struct fuse_intr_data *d = d_; |
| struct fuse *f = req_fuse(req); |
| |
| if (d->id == pthread_self()) |
| return; |
| |
| pthread_mutex_lock(&f->lock); |
| while (!d->finished) { |
| struct timeval now; |
| struct timespec timeout; |
| |
| pthread_kill(d->id, f->conf.intr_signal); |
| gettimeofday(&now, NULL); |
| timeout.tv_sec = now.tv_sec + 1; |
| timeout.tv_nsec = now.tv_usec * 1000; |
| pthread_cond_timedwait(&d->cond, &f->lock, &timeout); |
| } |
| pthread_mutex_unlock(&f->lock); |
| } |
| |
| static void fuse_do_finish_interrupt(struct fuse *f, fuse_req_t req, |
| struct fuse_intr_data *d) |
| { |
| pthread_mutex_lock(&f->lock); |
| d->finished = 1; |
| pthread_cond_broadcast(&d->cond); |
| pthread_mutex_unlock(&f->lock); |
| fuse_req_interrupt_func(req, NULL, NULL); |
| pthread_cond_destroy(&d->cond); |
| } |
| |
| static void fuse_do_prepare_interrupt(fuse_req_t req, struct fuse_intr_data *d) |
| { |
| d->id = pthread_self(); |
| pthread_cond_init(&d->cond, NULL); |
| d->finished = 0; |
| fuse_req_interrupt_func(req, fuse_interrupt, d); |
| } |
| |
| static inline void fuse_finish_interrupt(struct fuse *f, fuse_req_t req, |
| struct fuse_intr_data *d) |
| { |
| if (f->conf.intr) |
| fuse_do_finish_interrupt(f, req, d); |
| } |
| |
| static inline void fuse_prepare_interrupt(struct fuse *f, fuse_req_t req, |
| struct fuse_intr_data *d) |
| { |
| if (f->conf.intr) |
| fuse_do_prepare_interrupt(req, d); |
| } |
| |
| #ifndef __FreeBSD__ |
| |
| static int fuse_compat_open(struct fuse_fs *fs, const char *path, |
| struct fuse_file_info *fi) |
| { |
| int err; |
| if (!fs->compat || fs->compat >= 25) |
| err = fs->op.open(path, fi); |
| else if (fs->compat == 22) { |
| struct fuse_file_info_compat tmp; |
| memcpy(&tmp, fi, sizeof(tmp)); |
| err = ((struct fuse_operations_compat22 *) &fs->op)->open(path, &tmp); |
| memcpy(fi, &tmp, sizeof(tmp)); |
| fi->fh = tmp.fh; |
| } else |
| err = ((struct fuse_operations_compat2 *) &fs->op) |
| ->open(path, fi->flags); |
| return err; |
| } |
| |
| static int fuse_compat_release(struct fuse_fs *fs, const char *path, |
| struct fuse_file_info *fi) |
| { |
| if (!fs->compat || fs->compat >= 22) |
| return fs->op.release(path, fi); |
| else |
| return ((struct fuse_operations_compat2 *) &fs->op) |
| ->release(path, fi->flags); |
| } |
| |
| static int fuse_compat_opendir(struct fuse_fs *fs, const char *path, |
| struct fuse_file_info *fi) |
| { |
| if (!fs->compat || fs->compat >= 25) |
| return fs->op.opendir(path, fi); |
| else { |
| int err; |
| struct fuse_file_info_compat tmp; |
| memcpy(&tmp, fi, sizeof(tmp)); |
| err = ((struct fuse_operations_compat22 *) &fs->op) |
| ->opendir(path, &tmp); |
| memcpy(fi, &tmp, sizeof(tmp)); |
| fi->fh = tmp.fh; |
| return err; |
| } |
| } |
| |
| static void convert_statfs_compat(struct fuse_statfs_compat1 *compatbuf, |
| struct statvfs *stbuf) |
| { |
| stbuf->f_bsize = compatbuf->block_size; |
| stbuf->f_blocks = compatbuf->blocks; |
| stbuf->f_bfree = compatbuf->blocks_free; |
| stbuf->f_bavail = compatbuf->blocks_free; |
| stbuf->f_files = compatbuf->files; |
| stbuf->f_ffree = compatbuf->files_free; |
| stbuf->f_namemax = compatbuf->namelen; |
| } |
| |
| static void convert_statfs_old(struct statfs *oldbuf, struct statvfs *stbuf) |
| { |
| stbuf->f_bsize = oldbuf->f_bsize; |
| stbuf->f_blocks = oldbuf->f_blocks; |
| stbuf->f_bfree = oldbuf->f_bfree; |
| stbuf->f_bavail = oldbuf->f_bavail; |
| stbuf->f_files = oldbuf->f_files; |
| stbuf->f_ffree = oldbuf->f_ffree; |
| stbuf->f_namemax = oldbuf->f_namelen; |
| } |
| |
| static int fuse_compat_statfs(struct fuse_fs *fs, const char *path, |
| struct statvfs *buf) |
| { |
| int err; |
| |
| if (!fs->compat || fs->compat >= 25) { |
| err = fs->op.statfs(fs->compat == 25 ? "/" : path, buf); |
| } else if (fs->compat > 11) { |
| struct statfs oldbuf; |
| err = ((struct fuse_operations_compat22 *) &fs->op) |
| ->statfs("/", &oldbuf); |
| if (!err) |
| convert_statfs_old(&oldbuf, buf); |
| } else { |
| struct fuse_statfs_compat1 compatbuf; |
| memset(&compatbuf, 0, sizeof(struct fuse_statfs_compat1)); |
| err = ((struct fuse_operations_compat1 *) &fs->op)->statfs(&compatbuf); |
| if (!err) |
| convert_statfs_compat(&compatbuf, buf); |
| } |
| return err; |
| } |
| |
| #else /* __FreeBSD__ */ |
| |
| static inline int fuse_compat_open(struct fuse_fs *fs, char *path, |
| struct fuse_file_info *fi) |
| { |
| return fs->op.open(path, fi); |
| } |
| |
| static inline int fuse_compat_release(struct fuse_fs *fs, const char *path, |
| struct fuse_file_info *fi) |
| { |
| return fs->op.release(path, fi); |
| } |
| |
| static inline int fuse_compat_opendir(struct fuse_fs *fs, const char *path, |
| struct fuse_file_info *fi) |
| { |
| return fs->op.opendir(path, fi); |
| } |
| |
| static inline int fuse_compat_statfs(struct fuse_fs *fs, const char *path, |
| struct statvfs *buf) |
| { |
| return fs->op.statfs(fs->compat == 25 ? "/" : path, buf); |
| } |
| |
| #endif /* __FreeBSD__ */ |
| |
| 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 fuse_compat_release(fs, path, fi); |
| else |
| return 0; |
| } |
| |
| int fuse_fs_opendir(struct fuse_fs *fs, const char *path, |
| struct fuse_file_info *fi) |
| { |
| fuse_get_context()->private_data = fs->user_data; |
| if (fs->op.opendir) |
| return fuse_compat_opendir(fs, 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 fuse_compat_open(fs, 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 fuse_compat_statfs(fs, path, buf); |
| else { |
| buf->f_namemax = 255; |
| buf->f_bsize = 512; |
| return 0; |
| } |
| } |
| |
| int fuse_fs_releasedir(struct fuse_fs *fs, const char *path, |
| struct fuse_file_info *fi) |
| { |
| fuse_get_context()->private_data = fs->user_data; |
| if (fs->op.releasedir) |
| return fs->op.releasedir(path, fi); |
| else |
| return 0; |
| } |
| |
| static int fill_dir_old(struct fuse_dirhandle *dh, const char *name, int type, |
| ino_t ino) |
| { |
| int res; |
| struct stat stbuf; |
| |
| memset(&stbuf, 0, sizeof(stbuf)); |
| stbuf.st_mode = type << 12; |
| stbuf.st_ino = ino; |
| |
| res = dh->filler(dh->buf, name, &stbuf, 0); |
| return res ? -ENOMEM : 0; |
| } |
| |
| int fuse_fs_readdir(struct fuse_fs *fs, const char *path, void *buf, |
| fuse_fill_dir_t filler, 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 if (fs->op.getdir) { |
| struct fuse_dirhandle dh; |
| dh.filler = filler; |
| dh.buf = buf; |
| return fs->op.getdir(path, &dh, fill_dir_old); |
| } else |
| return -ENOSYS; |
| } |
| |
| int fuse_fs_create(struct fuse_fs *fs, const char *path, mode_t mode, |
| struct fuse_file_info *fi) |
| { |
| fuse_get_context()->private_data = fs->user_data; |
| if (fs->op.create) |
| 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; |
| } |
| |
| 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; |
| } |
| |
| static int mtime_eq(const struct stat *stbuf, const struct timespec *ts) |
| { |
| return stbuf->st_mtime == ts->tv_sec && ST_MTIM_NSEC(stbuf) == ts->tv_nsec; |
| } |
| |
| #ifndef CLOCK_MONOTONIC |
| #define CLOCK_MONOTONIC CLOCK_REALTIME |
| #endif |
| |
| static void curr_time(struct timespec *now) |
| { |
| static clockid_t clockid = CLOCK_MONOTONIC; |
| int res = clock_gettime(clockid, now); |
| if (res == -1 && errno == EINVAL) { |
| clockid = CLOCK_REALTIME; |
| res = clock_gettime(clockid, now); |
| } |
| if (res == -1) { |
| perror("fuse: clock_gettime"); |
| abort(); |
| } |
| } |
| |
| static void update_stat(struct node *node, const struct stat *stbuf) |
| { |
| if (node->cache_valid && (!mtime_eq(stbuf, &node->mtime) || |
| stbuf->st_size != node->size)) |
| node->cache_valid = 0; |
| node->mtime.tv_sec = stbuf->st_mtime; |
| node->mtime.tv_nsec = ST_MTIM_NSEC(stbuf); |
| node->size = stbuf->st_size; |
| curr_time(&node->stat_updated); |
| } |
| |
| static int lookup_path(struct fuse *f, fuse_ino_t nodeid, |
| const char *name, const char *path, |
| struct fuse_entry_param *e, struct fuse_file_info *fi) |
| { |
| int res; |
| |
| memset(e, 0, sizeof(struct fuse_entry_param)); |
| if (fi) |
| res = fuse_fs_fgetattr(f->fs, path, &e->attr, fi); |
| else |
| res = fuse_fs_getattr(f->fs, path, &e->attr); |
| if (res == 0) { |
| struct node *node; |
| |
| node = find_node(f, nodeid, name); |
| if (node == NULL) |
| res = -ENOMEM; |
| else { |
| e->ino = node->nodeid; |
| e->generation = node->generation; |
| e->entry_timeout = f->conf.entry_timeout; |
| e->attr_timeout = f->conf.attr_timeout; |
| if (f->conf.auto_cache) { |
| pthread_mutex_lock(&f->lock); |
| update_stat(node, &e->attr); |
| pthread_mutex_unlock(&f->lock); |
| } |
| set_stat(f, e->ino, &e->attr); |
| if (f->conf.debug) { |
| printf(" NODEID: %lu\n", (unsigned long) e->ino); |
| fflush(stdout); |
| } |
| } |
| } |
| 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; |
| return c->ctx.fuse; |
| } |
| |
| static inline void reply_err(fuse_req_t req, int err) |
| { |
| /* fuse_reply_err() uses non-negated errno values */ |
| fuse_reply_err(req, -err); |
| } |
| |
| static void reply_entry(fuse_req_t req, const struct fuse_entry_param *e, |
| int err) |
| { |
| if (!err) { |
| struct fuse *f = req_fuse(req); |
| if (fuse_reply_entry(req, e) == -ENOENT) |
| 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); |
| if (fs->m) |
| fuse_put_module(fs->m); |
| 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) { |
| printf("LOOKUP %s\n", path); |
| fflush(stdout); |
| } |
| 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) { |
| printf("FORGET %llu/%lu\n", (unsigned long long) ino, nlookup); |
| fflush(stdout); |
| } |
| 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) { |
| if (f->conf.auto_cache) { |
| pthread_mutex_lock(&f->lock); |
| update_stat(get_node(f, ino), &buf); |
| pthread_mutex_unlock(&f->lock); |
| } |
| set_stat(f, ino, &buf); |
| fuse_reply_attr(req, &buf, f->conf.attr_timeout); |
| } else |
| reply_err(req, err); |
| } |
| |
| int fuse_fs_chmod(struct fuse_fs *fs, const char *path, mode_t mode) |
| { |
| 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); |
| } |
| 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) { |
| if (f->conf.auto_cache) { |
| pthread_mutex_lock(&f->lock); |
| update_stat(get_node(f, ino), &buf); |
| pthread_mutex_unlock(&f->lock); |
| } |
| set_stat(f, ino, &buf); |
| fuse_reply_attr(req, &buf, f->conf.attr_timeout); |
| } else |
| reply_err(req, err); |
| } |
| |
| 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) { |
| printf("ACCESS %s 0%o\n", path, mask); |
| fflush(stdout); |
| } |
| 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) { |
| printf("MKNOD %s\n", path); |
| fflush(stdout); |
| } |
| 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) { |
| printf("MKDIR %s\n", path); |
| fflush(stdout); |
| } |
| 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) { |
| printf("UNLINK %s\n", path); |
| fflush(stdout); |
| } |
| 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) { |
| printf("RMDIR %s\n", path); |
| fflush(stdout); |
| } |
| 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) { |
| printf("SYMLINK %s\n", path); |
| fflush(stdout); |
| } |
| 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) { |
| printf("RENAME %s -> %s\n", oldpath, newpath); |
| fflush(stdout); |
| } |
| 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) { |
| printf("LINK %s\n", newpath); |
| fflush(stdout); |
| } |
| 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) { |
| printf(" CREATE[%llu] flags: 0x%x %s\n", |
| (unsigned long long) fi->fh, fi->flags, path); |
| fflush(stdout); |
| } |
| } else |
| reply_err(req, err); |
| |
| if (path) |
| free(path); |
| |
| pthread_rwlock_unlock(&f->tree_lock); |
| } |
| |
| 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); |
| } |
| |
| 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; |
| |
| if (f->conf.auto_cache) |
| open_auto_cache(f, ino, path, fi); |
| } |
| 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) { |
| printf("OPEN[%llu] flags: 0x%x %s\n", |
| (unsigned long long) fi->fh, fi->flags, path); |
| fflush(stdout); |
| } |
| } 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) { |
| printf("READ[%llu] %lu bytes from %llu\n", |
| (unsigned long long) fi->fh, (unsigned long) size, |
| (unsigned long long) off); |
| fflush(stdout); |
| } |
| |
| 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) { |
| printf(" READ[%llu] %u bytes\n", (unsigned long long) fi->fh, |
| res); |
| fflush(stdout); |
| } |
| 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) { |
| printf("WRITE%s[%llu] %lu bytes to %llu\n", |
| fi->writepage ? "PAGE" : "", (unsigned long long) fi->fh, |
| (unsigned long) size, (unsigned long long) off); |
| fflush(stdout); |
| } |
| |
| 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) { |
| printf(" WRITE%s[%llu] %u bytes\n", |
| fi->writepage ? "PAGE" : "", (unsigned long long) fi->fh, |
| res); |
| fflush(stdout); |
| } |
| 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_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) { |
| printf("RELEASE%s[%llu] flags: 0x%x\n", fi->flush ? "+FLUSH" : "", |
| (unsigned long long) fi->fh, fi->flags); |
| fflush(stdout); |
| } |
| fuse_prepare_interrupt(f, req, &d); |
| if (fi->flush && path) { |
| err = fuse_fs_flush(f->fs, path, fi); |
| if (err == -ENOSYS) |
| err = 0; |
| } |
| fuse_do_release(f, ino, path, fi); |
| fuse_finish_interrupt(f, req, &d); |
| |
| if (path) |
| free(path); |
| pthread_rwlock_unlock(&f->tree_lock); |
| |
| reply_err(req, err); |
| } |
| |
| 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) { |
| printf("FSYNC[%llu]\n", (unsigned long long) fi->fh); |
| fflush(stdout); |
| } |
| 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); |
| 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; |
| while (newsize < minsize) |
| newsize *= 2; |
| |
| 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 void fuse_lib_flush(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; |
| struct flock lock; |
| struct lock l; |
| char *path; |
| int err; |
| int errlock; |
| |
| err = -ENOENT; |
| pthread_rwlock_rdlock(&f->tree_lock); |
| path = get_path(f, ino); |
| if (path && f->conf.debug) { |
| printf("FLUSH[%llu]\n", (unsigned long long) fi->fh); |
| fflush(stdout); |
| } |
| fuse_prepare_interrupt(f, req, &d); |
| if (path) |
| err = fuse_fs_flush(f->fs, path, fi); |
| |
| memset(&lock, 0, sizeof(lock)); |
| lock.l_type = F_UNLCK; |
| lock.l_whence = SEEK_SET; |
| 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; |
| } |
| if (path) |
| 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 sleep) |
| { |
| int err = fuse_lock_common(req, ino, fi, lock, 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 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, |
| }; |
| |
| static void free_cmd(struct fuse_cmd *cmd) |
| { |
| free(cmd->buf); |
| free(cmd); |
| } |
| |
| void fuse_process_cmd(struct fuse *f, struct fuse_cmd *cmd) |
| { |
| fuse_session_process(f->se, cmd->buf, cmd->buflen, cmd->ch); |
| free_cmd(cmd); |
| } |
| |
| int fuse_exited(struct fuse *f) |
| { |
| return fuse_session_exited(f->se); |
| } |
| |
| struct fuse_session *fuse_get_session(struct fuse *f) |
| { |
| return f->se; |
| } |
| |
| static struct fuse_cmd *fuse_alloc_cmd(size_t bufsize) |
| { |
| struct fuse_cmd *cmd = (struct fuse_cmd *) malloc(sizeof(*cmd)); |
| if (cmd == NULL) { |
| fprintf(stderr, "fuse: failed to allocate cmd\n"); |
| return NULL; |
| } |
| cmd->buf = (char *) malloc(bufsize); |
| if (cmd->buf == NULL) { |
| fprintf(stderr, "fuse: failed to allocate read buffer\n"); |
| free(cmd); |
| return NULL; |
| } |
| return cmd; |
| } |
| |
| struct fuse_cmd *fuse_read_cmd(struct fuse *f) |
| { |
| struct fuse_chan *ch = fuse_session_next_chan(f->se, NULL); |
| size_t bufsize = fuse_chan_bufsize(ch); |
| struct fuse_cmd *cmd = fuse_alloc_cmd(bufsize); |
| if (cmd != NULL) { |
| int res = fuse_chan_recv(&ch, cmd->buf, bufsize); |
| if (res <= 0) { |
| free_cmd(cmd); |
| if (res < 0 && res != -EINTR && res != -EAGAIN) |
| fuse_exit(f); |
| return NULL; |
| } |
| cmd->buflen = res; |
| cmd->ch = ch; |
| } |
| return cmd; |
| } |
| |
| int fuse_loop(struct fuse *f) |
| { |
| if (f) |
| return fuse_session_loop(f->se); |
| else |
| return -1; |
| } |
| |
| int fuse_invalidate(struct fuse *f, const char *path) |
| { |
| (void) f; |
| (void) path; |
| return -EINVAL; |
| } |
| |
| 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); |
| } |
| |
| void fuse_set_getcontext_func(struct fuse_context *(*func)(void)) |
| { |
| (void) func; |
| /* no-op */ |
| } |
| |
| 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), |
| FUSE_LIB_OPT("auto_cache", auto_cache, 1), |
| FUSE_LIB_OPT("noauto_cache", auto_cache, 0), |
| 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), |
| FUSE_LIB_OPT("modules=%s", modules, 0), |
| 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" |
| " -o [no]auto_cache enable caching based on modification times\n" |
| " -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" |
| " -o modules=M1[:M2...] names of modules to push onto filesystem stack\n" |
| "\n", FUSE_DEFAULT_INTR_SIGNAL); |
| } |
| |
| 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); |
| } |
| |
| 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; |
| } |
| |
| int fuse_is_lib_option(const char *opt) |
| { |
| return fuse_lowlevel_is_lib_option(opt) || |
| fuse_opt_match(fuse_lib_opts, opt); |
| } |
| |
| 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); |
| } |
| |
| |
| static int fuse_push_module(struct fuse *f, const char *module, |
| struct fuse_args *args) |
| { |
| struct fuse_fs *fs[2] = { f->fs, NULL }; |
| struct fuse_fs *newfs; |
| struct fuse_module *m = fuse_get_module(module); |
| |
| 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; |
| } |
| |
| 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; |
| memcpy(&fs->op, op, op_size); |
| return fs; |
| } |
| |
| struct fuse *fuse_new_common(struct fuse_chan *ch, struct fuse_args *args, |
| const struct fuse_operations *op, |
| size_t op_size, void *user_data, int compat) |
| { |
| 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; |
| |
| fs->compat = compat; |
| 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; |
| |
| 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; |
| } |
| } |
| |
| if (!f->conf.ac_attr_timeout_set) |
| f->conf.ac_attr_timeout = f->conf.attr_timeout; |
| |
| #ifdef __FreeBSD__ |
| /* |
| * In FreeBSD, we always use these settings as inode numbers are needed to |
| * make getcwd(3) work. |
| */ |
| f->conf.readdir_ino = 1; |
| #endif |
| |
| if (compat && compat <= 25) { |
| if (fuse_sync_compat_args(args) == -1) |
| goto out_free_fs; |
| } |
| |
| f->se = fuse_lowlevel_new_common(args, &llop, sizeof(llop), f); |
| if (f->se == NULL) { |
| if (f->conf.help) |
| fuse_lib_help_modules(); |
| 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 = 0; |
| 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); |
| out_free: |
| free(f); |
| out_delete_context_key: |
| fuse_delete_context_key(); |
| out: |
| return NULL; |
| } |
| |
| struct fuse *fuse_new(struct fuse_chan *ch, struct fuse_args *args, |
| const struct fuse_operations *op, size_t op_size, |
| void *user_data) |
| { |
| return fuse_new_common(ch, args, op, op_size, user_data, 0); |
| } |
| |
| 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); |
| free(f); |
| fuse_delete_context_key(); |
| } |
| |
| static struct fuse *fuse_new_common_compat25(int fd, struct fuse_args *args, |
| const struct fuse_operations *op, |
| size_t op_size, int compat) |
| { |
| struct fuse *f = NULL; |
| struct fuse_chan *ch = fuse_kern_chan_new(fd); |
| |
| if (ch) |
| f = fuse_new_common(ch, args, op, op_size, NULL, compat); |
| |
| return f; |
| } |
| |
| /* called with fuse_context_lock held or during initialization (before |
| main() has been called) */ |
| void fuse_register_module(struct fuse_module *mod) |
| { |
| mod->ctr = 0; |
| mod->so = fuse_current_so; |
| if (mod->so) |
| mod->so->ctr++; |
| mod->next = fuse_modules; |
| fuse_modules = mod; |
| } |
| |
| #ifndef __FreeBSD__ |
| |
| static struct fuse *fuse_new_common_compat(int fd, const char *opts, |
| const struct fuse_operations *op, |
| size_t op_size, int compat) |
| { |
| struct fuse *f; |
| struct fuse_args args = FUSE_ARGS_INIT(0, NULL); |
| |
| if (fuse_opt_add_arg(&args, "") == -1) |
| return NULL; |
| if (opts && |
| (fuse_opt_add_arg(&args, "-o") == -1 || |
| fuse_opt_add_arg(&args, opts) == -1)) { |
| fuse_opt_free_args(&args); |
| return NULL; |
| } |
| f = fuse_new_common_compat25(fd, &args, op, op_size, compat); |
| fuse_opt_free_args(&args); |
| |
| return f; |
| } |
| |
| struct fuse *fuse_new_compat22(int fd, const char *opts, |
| const struct fuse_operations_compat22 *op, |
| size_t op_size) |
| { |
| return fuse_new_common_compat(fd, opts, (struct fuse_operations *) op, |
| op_size, 22); |
| } |
| |
| struct fuse *fuse_new_compat2(int fd, const char *opts, |
| const struct fuse_operations_compat2 *op) |
| { |
| return fuse_new_common_compat(fd, opts, (struct fuse_operations *) op, |
| sizeof(struct fuse_operations_compat2), 21); |
| } |
| |
| struct fuse *fuse_new_compat1(int fd, int flags, |
| const struct fuse_operations_compat1 *op) |
| { |
| const char *opts = NULL; |
| if (flags & FUSE_DEBUG_COMPAT1) |
| opts = "debug"; |
| return fuse_new_common_compat(fd, opts, (struct fuse_operations *) op, |
| sizeof(struct fuse_operations_compat1), 11); |
| } |
| |
| __asm__(".symver fuse_exited,__fuse_exited@"); |
| __asm__(".symver fuse_process_cmd,__fuse_process_cmd@"); |
| __asm__(".symver fuse_read_cmd,__fuse_read_cmd@"); |
| __asm__(".symver fuse_set_getcontext_func,__fuse_set_getcontext_func@"); |
| __asm__(".symver fuse_new_compat2,fuse_new@"); |
| __asm__(".symver fuse_new_compat22,fuse_new@FUSE_2.2"); |
| |
| #endif /* __FreeBSD__ */ |
| |
| struct fuse *fuse_new_compat25(int fd, struct fuse_args *args, |
| const struct fuse_operations_compat25 *op, |
| size_t op_size) |
| { |
| return fuse_new_common_compat25(fd, args, (struct fuse_operations *) op, |
| op_size, 25); |
| } |
| |
| __asm__(".symver fuse_new_compat25,fuse_new@FUSE_2.5"); |