| /* |
| 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 |
| */ |
| |
| #include "fuse_lowlevel.h" |
| #include "fuse_kernel.h" |
| #include "fuse_opt.h" |
| #include "fuse_i.h" |
| #include "fuse_misc.h" |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <stddef.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <limits.h> |
| #include <errno.h> |
| |
| #define PARAM(inarg) (((char *)(inarg)) + sizeof(*(inarg))) |
| #define OFFSET_MAX 0x7fffffffffffffffLL |
| |
| struct fuse_ll; |
| |
| struct fuse_req { |
| struct fuse_ll *f; |
| uint64_t unique; |
| struct fuse_ctx ctx; |
| struct fuse_chan *ch; |
| int interrupted; |
| union { |
| struct { |
| uint64_t unique; |
| } i; |
| struct { |
| fuse_interrupt_func_t func; |
| void *data; |
| } ni; |
| } u; |
| struct fuse_req *next; |
| struct fuse_req *prev; |
| }; |
| |
| struct fuse_ll { |
| int debug; |
| int allow_root; |
| struct fuse_lowlevel_ops op; |
| int got_init; |
| void *userdata; |
| uid_t owner; |
| struct fuse_conn_info conn; |
| struct fuse_req list; |
| struct fuse_req interrupts; |
| pthread_mutex_t lock; |
| }; |
| |
| static void convert_stat(const struct stat *stbuf, struct fuse_attr *attr) |
| { |
| attr->ino = stbuf->st_ino; |
| attr->mode = stbuf->st_mode; |
| attr->nlink = stbuf->st_nlink; |
| attr->uid = stbuf->st_uid; |
| attr->gid = stbuf->st_gid; |
| attr->rdev = stbuf->st_rdev; |
| attr->size = stbuf->st_size; |
| attr->blocks = stbuf->st_blocks; |
| attr->atime = stbuf->st_atime; |
| attr->mtime = stbuf->st_mtime; |
| attr->ctime = stbuf->st_ctime; |
| #ifdef HAVE_STRUCT_STAT_ST_ATIM |
| attr->atimensec = stbuf->st_atim.tv_nsec; |
| attr->mtimensec = stbuf->st_mtim.tv_nsec; |
| attr->ctimensec = stbuf->st_ctim.tv_nsec; |
| #endif |
| } |
| |
| static void convert_attr(const struct fuse_setattr_in *attr, struct stat *stbuf) |
| { |
| stbuf->st_mode = attr->mode; |
| stbuf->st_uid = attr->uid; |
| stbuf->st_gid = attr->gid; |
| stbuf->st_size = attr->size; |
| stbuf->st_atime = attr->atime; |
| stbuf->st_mtime = attr->mtime; |
| #ifdef HAVE_STRUCT_STAT_ST_ATIM |
| stbuf->st_atim.tv_nsec = attr->atimensec; |
| stbuf->st_mtim.tv_nsec = attr->mtimensec; |
| #endif |
| } |
| |
| static size_t iov_length(const struct iovec *iov, size_t count) |
| { |
| size_t seg; |
| size_t ret = 0; |
| |
| for (seg = 0; seg < count; seg++) |
| ret += iov[seg].iov_len; |
| return ret; |
| } |
| |
| static void list_init_req(struct fuse_req *req) |
| { |
| req->next = req; |
| req->prev = req; |
| } |
| |
| static void list_del_req(struct fuse_req *req) |
| { |
| struct fuse_req *prev = req->prev; |
| struct fuse_req *next = req->next; |
| prev->next = next; |
| next->prev = prev; |
| } |
| |
| static void list_add_req(struct fuse_req *req, struct fuse_req *next) |
| { |
| struct fuse_req *prev = next->prev; |
| req->next = next; |
| req->prev = prev; |
| prev->next = req; |
| next->prev = req; |
| } |
| |
| static void free_req(fuse_req_t req) |
| { |
| pthread_mutex_lock(&req->f->lock); |
| list_del_req(req); |
| pthread_mutex_unlock(&req->f->lock); |
| free(req); |
| } |
| |
| static int send_reply(fuse_req_t req, int error, const void *arg, |
| size_t argsize) |
| { |
| struct fuse_out_header out; |
| struct iovec iov[2]; |
| size_t count; |
| int res; |
| |
| if (error <= -1000 || error > 0) { |
| fprintf(stderr, "fuse: bad error value: %i\n", error); |
| error = -ERANGE; |
| } |
| |
| out.unique = req->unique; |
| out.error = error; |
| count = 1; |
| iov[0].iov_base = &out; |
| iov[0].iov_len = sizeof(struct fuse_out_header); |
| if (argsize && !error) { |
| count++; |
| iov[1].iov_base = (void *) arg; |
| iov[1].iov_len = argsize; |
| } |
| out.len = iov_length(iov, count); |
| |
| if (req->f->debug) { |
| printf(" unique: %llu, error: %i (%s), outsize: %i\n", |
| out.unique, out.error, strerror(-out.error), out.len); |
| fflush(stdout); |
| } |
| res = fuse_chan_send(req->ch, iov, count); |
| free_req(req); |
| |
| return res; |
| } |
| |
| size_t fuse_dirent_size(size_t namelen) |
| { |
| return FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + namelen); |
| } |
| |
| char *fuse_add_dirent(char *buf, const char *name, const struct stat *stbuf, |
| off_t off) |
| { |
| unsigned namelen = strlen(name); |
| unsigned entlen = FUSE_NAME_OFFSET + namelen; |
| unsigned entsize = fuse_dirent_size(namelen); |
| unsigned padlen = entsize - entlen; |
| struct fuse_dirent *dirent = (struct fuse_dirent *) buf; |
| |
| dirent->ino = stbuf->st_ino; |
| dirent->off = off; |
| dirent->namelen = namelen; |
| dirent->type = (stbuf->st_mode & 0170000) >> 12; |
| strncpy(dirent->name, name, namelen); |
| if (padlen) |
| memset(buf + entlen, 0, padlen); |
| |
| return buf + entsize; |
| } |
| |
| size_t fuse_add_direntry(fuse_req_t req, char *buf, size_t bufsize, |
| const char *name, const struct stat *stbuf, off_t off) |
| { |
| size_t entsize; |
| |
| (void) req; |
| entsize = fuse_dirent_size(strlen(name)); |
| if (entsize <= bufsize && buf) |
| fuse_add_dirent(buf, name, stbuf, off); |
| return entsize; |
| } |
| |
| static void convert_statfs(const struct statvfs *stbuf, |
| struct fuse_kstatfs *kstatfs) |
| { |
| kstatfs->bsize = stbuf->f_bsize; |
| kstatfs->frsize = stbuf->f_frsize; |
| kstatfs->blocks = stbuf->f_blocks; |
| kstatfs->bfree = stbuf->f_bfree; |
| kstatfs->bavail = stbuf->f_bavail; |
| kstatfs->files = stbuf->f_files; |
| kstatfs->ffree = stbuf->f_ffree; |
| kstatfs->namelen = stbuf->f_namemax; |
| } |
| |
| static int send_reply_ok(fuse_req_t req, const void *arg, size_t argsize) |
| { |
| return send_reply(req, 0, arg, argsize); |
| } |
| |
| int fuse_reply_err(fuse_req_t req, int err) |
| { |
| return send_reply(req, -err, NULL, 0); |
| } |
| |
| void fuse_reply_none(fuse_req_t req) |
| { |
| fuse_chan_send(req->ch, NULL, 0); |
| free_req(req); |
| } |
| |
| static unsigned long calc_timeout_sec(double t) |
| { |
| if (t > (double) ULONG_MAX) |
| return ULONG_MAX; |
| else if (t < 0.0) |
| return 0; |
| else |
| return (unsigned long) t; |
| } |
| |
| static unsigned int calc_timeout_nsec(double t) |
| { |
| double f = t - (double) calc_timeout_sec(t); |
| if (f < 0.0) |
| return 0; |
| else if (f >= 0.999999999) |
| return 999999999; |
| else |
| return (unsigned int) (f * 1.0e9); |
| } |
| |
| static void fill_entry(struct fuse_entry_out *arg, |
| const struct fuse_entry_param *e) |
| { |
| arg->nodeid = e->ino; |
| arg->generation = e->generation; |
| arg->entry_valid = calc_timeout_sec(e->entry_timeout); |
| arg->entry_valid_nsec = calc_timeout_nsec(e->entry_timeout); |
| arg->attr_valid = calc_timeout_sec(e->attr_timeout); |
| arg->attr_valid_nsec = calc_timeout_nsec(e->attr_timeout); |
| convert_stat(&e->attr, &arg->attr); |
| } |
| |
| static void fill_open(struct fuse_open_out *arg, |
| const struct fuse_file_info *f) |
| { |
| arg->fh = f->fh; |
| if (f->direct_io) |
| arg->open_flags |= FOPEN_DIRECT_IO; |
| if (f->keep_cache) |
| arg->open_flags |= FOPEN_KEEP_CACHE; |
| } |
| |
| int fuse_reply_entry(fuse_req_t req, const struct fuse_entry_param *e) |
| { |
| struct fuse_entry_out arg; |
| |
| /* before ABI 7.4 e->ino == 0 was invalid, only ENOENT meant |
| negative entry */ |
| if (!e->ino && req->f->conn.proto_minor < 4) |
| return fuse_reply_err(req, ENOENT); |
| |
| memset(&arg, 0, sizeof(arg)); |
| fill_entry(&arg, e); |
| return send_reply_ok(req, &arg, sizeof(arg)); |
| } |
| |
| int fuse_reply_create(fuse_req_t req, const struct fuse_entry_param *e, |
| const struct fuse_file_info *f) |
| { |
| struct { |
| struct fuse_entry_out e; |
| struct fuse_open_out o; |
| } arg; |
| |
| memset(&arg, 0, sizeof(arg)); |
| fill_entry(&arg.e, e); |
| fill_open(&arg.o, f); |
| return send_reply_ok(req, &arg, sizeof(arg)); |
| } |
| |
| int fuse_reply_attr(fuse_req_t req, const struct stat *attr, |
| double attr_timeout) |
| { |
| struct fuse_attr_out arg; |
| |
| memset(&arg, 0, sizeof(arg)); |
| arg.attr_valid = calc_timeout_sec(attr_timeout); |
| arg.attr_valid_nsec = calc_timeout_nsec(attr_timeout); |
| convert_stat(attr, &arg.attr); |
| |
| return send_reply_ok(req, &arg, sizeof(arg)); |
| } |
| |
| int fuse_reply_readlink(fuse_req_t req, const char *linkname) |
| { |
| return send_reply_ok(req, linkname, strlen(linkname)); |
| } |
| |
| int fuse_reply_open(fuse_req_t req, const struct fuse_file_info *f) |
| { |
| struct fuse_open_out arg; |
| |
| memset(&arg, 0, sizeof(arg)); |
| fill_open(&arg, f); |
| return send_reply_ok(req, &arg, sizeof(arg)); |
| } |
| |
| int fuse_reply_write(fuse_req_t req, size_t count) |
| { |
| struct fuse_write_out arg; |
| |
| memset(&arg, 0, sizeof(arg)); |
| arg.size = count; |
| |
| return send_reply_ok(req, &arg, sizeof(arg)); |
| } |
| |
| int fuse_reply_buf(fuse_req_t req, const char *buf, size_t size) |
| { |
| return send_reply_ok(req, buf, size); |
| } |
| |
| int fuse_reply_statfs(fuse_req_t req, const struct statvfs *stbuf) |
| { |
| struct fuse_statfs_out arg; |
| size_t size = req->f->conn.proto_minor < 4 ? FUSE_COMPAT_STATFS_SIZE : sizeof(arg); |
| |
| memset(&arg, 0, sizeof(arg)); |
| convert_statfs(stbuf, &arg.st); |
| |
| return send_reply_ok(req, &arg, size); |
| } |
| |
| int fuse_reply_xattr(fuse_req_t req, size_t count) |
| { |
| struct fuse_getxattr_out arg; |
| |
| memset(&arg, 0, sizeof(arg)); |
| arg.size = count; |
| |
| return send_reply_ok(req, &arg, sizeof(arg)); |
| } |
| |
| int fuse_reply_lock(fuse_req_t req, struct flock *lock) |
| { |
| struct fuse_lk_out arg; |
| |
| memset(&arg, 0, sizeof(arg)); |
| arg.lk.type = lock->l_type; |
| if (lock->l_type != F_UNLCK) { |
| arg.lk.start = lock->l_start; |
| if (lock->l_len == 0) |
| arg.lk.end = OFFSET_MAX; |
| else |
| arg.lk.end = lock->l_start + lock->l_len - 1; |
| } |
| arg.lk.pid = lock->l_pid; |
| return send_reply_ok(req, &arg, sizeof(arg)); |
| } |
| |
| static void do_lookup(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| char *name = (char *) inarg; |
| |
| if (req->f->op.lookup) |
| req->f->op.lookup(req, nodeid, name); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_forget(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_forget_in *arg = (struct fuse_forget_in *) inarg; |
| |
| if (req->f->op.forget) |
| req->f->op.forget(req, nodeid, arg->nlookup); |
| } |
| |
| static void do_getattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| (void) inarg; |
| |
| if (req->f->op.getattr) |
| req->f->op.getattr(req, nodeid, NULL); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_setattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_setattr_in *arg = (struct fuse_setattr_in *) inarg; |
| |
| if (req->f->op.setattr) { |
| struct fuse_file_info *fi = NULL; |
| struct fuse_file_info fi_store; |
| struct stat stbuf; |
| memset(&stbuf, 0, sizeof(stbuf)); |
| convert_attr(arg, &stbuf); |
| if (arg->valid & FATTR_FH) { |
| arg->valid &= ~FATTR_FH; |
| memset(&fi_store, 0, sizeof(fi_store)); |
| fi = &fi_store; |
| fi->fh = arg->fh; |
| fi->fh_old = fi->fh; |
| } |
| req->f->op.setattr(req, nodeid, &stbuf, arg->valid, fi); |
| } else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_access(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_access_in *arg = (struct fuse_access_in *) inarg; |
| |
| if (req->f->op.access) |
| req->f->op.access(req, nodeid, arg->mask); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_readlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| (void) inarg; |
| |
| if (req->f->op.readlink) |
| req->f->op.readlink(req, nodeid); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_mknod(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_mknod_in *arg = (struct fuse_mknod_in *) inarg; |
| |
| if (req->f->op.mknod) |
| req->f->op.mknod(req, nodeid, PARAM(arg), arg->mode, arg->rdev); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_mkdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_mkdir_in *arg = (struct fuse_mkdir_in *) inarg; |
| |
| if (req->f->op.mkdir) |
| req->f->op.mkdir(req, nodeid, PARAM(arg), arg->mode); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_unlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| char *name = (char *) inarg; |
| |
| if (req->f->op.unlink) |
| req->f->op.unlink(req, nodeid, name); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_rmdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| char *name = (char *) inarg; |
| |
| if (req->f->op.rmdir) |
| req->f->op.rmdir(req, nodeid, name); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_symlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| char *name = (char *) inarg; |
| char *linkname = ((char *) inarg) + strlen((char *) inarg) + 1; |
| |
| if (req->f->op.symlink) |
| req->f->op.symlink(req, linkname, nodeid, name); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_rename(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_rename_in *arg = (struct fuse_rename_in *) inarg; |
| char *oldname = PARAM(arg); |
| char *newname = oldname + strlen(oldname) + 1; |
| |
| if (req->f->op.rename) |
| req->f->op.rename(req, nodeid, oldname, arg->newdir, newname); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_link(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_link_in *arg = (struct fuse_link_in *) inarg; |
| |
| if (req->f->op.link) |
| req->f->op.link(req, arg->oldnodeid, nodeid, PARAM(arg)); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_create(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_open_in *arg = (struct fuse_open_in *) inarg; |
| |
| if (req->f->op.create) { |
| struct fuse_file_info fi; |
| |
| memset(&fi, 0, sizeof(fi)); |
| fi.flags = arg->flags; |
| |
| req->f->op.create(req, nodeid, PARAM(arg), arg->mode, &fi); |
| } else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_open(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_open_in *arg = (struct fuse_open_in *) inarg; |
| struct fuse_file_info fi; |
| |
| memset(&fi, 0, sizeof(fi)); |
| fi.flags = arg->flags; |
| |
| if (req->f->op.open) |
| req->f->op.open(req, nodeid, &fi); |
| else |
| fuse_reply_open(req, &fi); |
| } |
| |
| static void do_read(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_read_in *arg = (struct fuse_read_in *) inarg; |
| |
| if (req->f->op.read) { |
| struct fuse_file_info fi; |
| |
| memset(&fi, 0, sizeof(fi)); |
| fi.fh = arg->fh; |
| fi.fh_old = fi.fh; |
| req->f->op.read(req, nodeid, arg->size, arg->offset, &fi); |
| } else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_write(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_write_in *arg = (struct fuse_write_in *) inarg; |
| struct fuse_file_info fi; |
| |
| memset(&fi, 0, sizeof(fi)); |
| fi.fh = arg->fh; |
| fi.fh_old = fi.fh; |
| fi.writepage = arg->write_flags & 1; |
| |
| if (req->f->op.write) |
| req->f->op.write(req, nodeid, PARAM(arg), arg->size, arg->offset, &fi); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_flush(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_flush_in *arg = (struct fuse_flush_in *) inarg; |
| struct fuse_file_info fi; |
| uint64_t lock_owner = 0; |
| |
| if (req->f->conn.proto_minor >= 7) |
| lock_owner = arg->lock_owner; |
| |
| memset(&fi, 0, sizeof(fi)); |
| fi.fh = arg->fh; |
| fi.fh_old = fi.fh; |
| |
| if (req->f->op.flush) |
| req->f->op.flush(req, nodeid, &fi, lock_owner); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_release(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_release_in *arg = (struct fuse_release_in *) inarg; |
| struct fuse_file_info fi; |
| |
| memset(&fi, 0, sizeof(fi)); |
| fi.flags = arg->flags; |
| fi.fh = arg->fh; |
| fi.fh_old = fi.fh; |
| |
| if (req->f->op.release) |
| req->f->op.release(req, nodeid, &fi); |
| else |
| fuse_reply_err(req, 0); |
| } |
| |
| static void do_fsync(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_fsync_in *arg = (struct fuse_fsync_in *) inarg; |
| struct fuse_file_info fi; |
| |
| memset(&fi, 0, sizeof(fi)); |
| fi.fh = arg->fh; |
| fi.fh_old = fi.fh; |
| |
| if (req->f->op.fsync) |
| req->f->op.fsync(req, nodeid, arg->fsync_flags & 1, &fi); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_opendir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_open_in *arg = (struct fuse_open_in *) inarg; |
| struct fuse_file_info fi; |
| |
| memset(&fi, 0, sizeof(fi)); |
| fi.flags = arg->flags; |
| |
| if (req->f->op.opendir) |
| req->f->op.opendir(req, nodeid, &fi); |
| else |
| fuse_reply_open(req, &fi); |
| } |
| |
| static void do_readdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_read_in *arg = (struct fuse_read_in *) inarg; |
| struct fuse_file_info fi; |
| |
| memset(&fi, 0, sizeof(fi)); |
| fi.fh = arg->fh; |
| fi.fh_old = fi.fh; |
| |
| if (req->f->op.readdir) |
| req->f->op.readdir(req, nodeid, arg->size, arg->offset, &fi); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_releasedir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_release_in *arg = (struct fuse_release_in *) inarg; |
| struct fuse_file_info fi; |
| |
| memset(&fi, 0, sizeof(fi)); |
| fi.flags = arg->flags; |
| fi.fh = arg->fh; |
| fi.fh_old = fi.fh; |
| |
| if (req->f->op.releasedir) |
| req->f->op.releasedir(req, nodeid, &fi); |
| else |
| fuse_reply_err(req, 0); |
| } |
| |
| static void do_fsyncdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_fsync_in *arg = (struct fuse_fsync_in *) inarg; |
| struct fuse_file_info fi; |
| |
| memset(&fi, 0, sizeof(fi)); |
| fi.fh = arg->fh; |
| fi.fh_old = fi.fh; |
| |
| if (req->f->op.fsyncdir) |
| req->f->op.fsyncdir(req, nodeid, arg->fsync_flags & 1, &fi); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_statfs(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| (void) nodeid; |
| (void) inarg; |
| |
| if (req->f->op.statfs) |
| req->f->op.statfs(req, nodeid); |
| else { |
| struct statvfs buf = { |
| .f_namemax = 255, |
| .f_bsize = 512, |
| }; |
| fuse_reply_statfs(req, &buf); |
| } |
| } |
| |
| static void do_setxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_setxattr_in *arg = (struct fuse_setxattr_in *) inarg; |
| char *name = PARAM(arg); |
| char *value = name + strlen(name) + 1; |
| |
| if (req->f->op.setxattr) |
| req->f->op.setxattr(req, nodeid, name, value, arg->size, arg->flags); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_getxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_getxattr_in *arg = (struct fuse_getxattr_in *) inarg; |
| |
| if (req->f->op.getxattr) |
| req->f->op.getxattr(req, nodeid, PARAM(arg), arg->size); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_listxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_getxattr_in *arg = (struct fuse_getxattr_in *) inarg; |
| |
| if (req->f->op.listxattr) |
| req->f->op.listxattr(req, nodeid, arg->size); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_removexattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| char *name = (char *) inarg; |
| |
| if (req->f->op.removexattr) |
| req->f->op.removexattr(req, nodeid, name); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void convert_fuse_file_lock(struct fuse_file_lock *fl, |
| struct flock *flock) |
| { |
| memset(flock, 0, sizeof(struct flock)); |
| flock->l_type = fl->type; |
| flock->l_whence = SEEK_SET; |
| flock->l_start = fl->start; |
| if (fl->end == OFFSET_MAX) |
| flock->l_len = 0; |
| else |
| flock->l_len = fl->end - fl->start + 1; |
| flock->l_pid = fl->pid; |
| } |
| |
| static void do_getlk(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_lk_in *arg = (struct fuse_lk_in *) inarg; |
| struct fuse_file_info fi; |
| struct flock flock; |
| |
| memset(&fi, 0, sizeof(fi)); |
| fi.fh = arg->fh; |
| |
| convert_fuse_file_lock(&arg->lk, &flock); |
| if (req->f->op.getlk) |
| req->f->op.getlk(req, nodeid, &fi, &flock, arg->owner); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_setlk_common(fuse_req_t req, fuse_ino_t nodeid, |
| const void *inarg, int sleep) |
| { |
| struct fuse_lk_in *arg = (struct fuse_lk_in *) inarg; |
| struct fuse_file_info fi; |
| struct flock flock; |
| |
| memset(&fi, 0, sizeof(fi)); |
| fi.fh = arg->fh; |
| |
| convert_fuse_file_lock(&arg->lk, &flock); |
| if (req->f->op.setlk) |
| req->f->op.setlk(req, nodeid, &fi, &flock, arg->owner, sleep); |
| else |
| fuse_reply_err(req, ENOSYS); |
| } |
| |
| static void do_setlk(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| do_setlk_common(req, nodeid, inarg, 0); |
| } |
| |
| static void do_setlkw(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| do_setlk_common(req, nodeid, inarg, 1); |
| } |
| |
| static int find_interrupted(struct fuse_ll *f, struct fuse_req *req) |
| { |
| struct fuse_req *curr; |
| |
| for (curr = f->list.next; curr != &f->list; curr = curr->next) { |
| if (curr->unique == req->u.i.unique) { |
| curr->interrupted = 1; |
| if (curr->u.ni.func) |
| curr->u.ni.func(curr, curr->u.ni.data); |
| return 1; |
| } |
| } |
| for (curr = f->interrupts.next; curr != &f->interrupts; curr = curr->next) { |
| if (curr->u.i.unique == req->u.i.unique) |
| return 1; |
| } |
| return 0; |
| } |
| |
| static void do_interrupt(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_interrupt_in *arg = (struct fuse_interrupt_in *) inarg; |
| struct fuse_ll *f = req->f; |
| |
| (void) nodeid; |
| if (f->debug) { |
| printf("INTERRUPT: %llu\n", (unsigned long long) arg->unique); |
| fflush(stdout); |
| } |
| |
| req->u.i.unique = arg->unique; |
| |
| pthread_mutex_lock(&f->lock); |
| if (find_interrupted(f, req)) |
| free(req); |
| else |
| list_add_req(req, &f->interrupts); |
| pthread_mutex_unlock(&f->lock); |
| } |
| |
| static struct fuse_req *check_interrupt(struct fuse_ll *f, struct fuse_req *req) |
| { |
| struct fuse_req *curr; |
| |
| for (curr = f->interrupts.next; curr != &f->interrupts; curr = curr->next) { |
| if (curr->u.i.unique == req->unique) { |
| req->interrupted = 1; |
| list_del_req(curr); |
| free(curr); |
| return NULL; |
| } |
| } |
| curr = f->interrupts.next; |
| if (curr != &f->interrupts) { |
| list_del_req(curr); |
| list_init_req(curr); |
| return curr; |
| } else |
| return NULL; |
| } |
| |
| static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg) |
| { |
| struct fuse_init_in *arg = (struct fuse_init_in *) inarg; |
| struct fuse_init_out outarg; |
| struct fuse_ll *f = req->f; |
| size_t bufsize = fuse_chan_bufsize(req->ch); |
| |
| (void) nodeid; |
| if (f->debug) { |
| printf("INIT: %u.%u\n", arg->major, arg->minor); |
| if (arg->major > 7 || (arg->major == 7 && arg->minor >= 6)) { |
| printf("flags=0x%08x\n", arg->flags); |
| printf("max_readahead=0x%08x\n", arg->max_readahead); |
| } |
| fflush(stdout); |
| } |
| f->conn.proto_major = arg->major; |
| f->conn.proto_minor = arg->minor; |
| |
| if (arg->major > 7 || (arg->major == 7 && arg->minor >= 6)) { |
| if (f->conn.async_read) |
| f->conn.async_read = arg->flags & FUSE_ASYNC_READ; |
| if (arg->max_readahead < f->conn.max_readahead) |
| f->conn.max_readahead = arg->max_readahead; |
| } else { |
| f->conn.async_read = 0; |
| f->conn.max_readahead = 0; |
| } |
| |
| if (bufsize < FUSE_MIN_READ_BUFFER) { |
| fprintf(stderr, "fuse: warning: buffer size too small: %i\n", bufsize); |
| bufsize = FUSE_MIN_READ_BUFFER; |
| } |
| |
| bufsize -= 4096; |
| if (bufsize < f->conn.max_write) |
| f->conn.max_write = bufsize; |
| |
| f->got_init = 1; |
| if (f->op.init) |
| f->op.init(f->userdata, &f->conn); |
| |
| memset(&outarg, 0, sizeof(outarg)); |
| outarg.major = FUSE_KERNEL_VERSION; |
| outarg.minor = FUSE_KERNEL_MINOR_VERSION; |
| if (f->conn.async_read) |
| outarg.flags |= FUSE_ASYNC_READ; |
| if (f->op.getlk && f->op.setlk) |
| outarg.flags |= FUSE_POSIX_LOCKS; |
| outarg.max_readahead = f->conn.max_readahead; |
| outarg.max_write = f->conn.max_write; |
| |
| if (f->debug) { |
| printf(" INIT: %u.%u\n", outarg.major, outarg.minor); |
| printf(" flags=0x%08x\n", outarg.flags); |
| printf(" max_readahead=0x%08x\n", outarg.max_readahead); |
| printf(" max_write=0x%08x\n", outarg.max_write); |
| fflush(stdout); |
| } |
| |
| send_reply_ok(req, &outarg, arg->minor < 5 ? 8 : sizeof(outarg)); |
| } |
| |
| void *fuse_req_userdata(fuse_req_t req) |
| { |
| return req->f->userdata; |
| } |
| |
| const struct fuse_ctx *fuse_req_ctx(fuse_req_t req) |
| { |
| return &req->ctx; |
| } |
| |
| void fuse_req_interrupt_func(fuse_req_t req, fuse_interrupt_func_t func, |
| void *data) |
| { |
| struct fuse_ll *f = req->f; |
| |
| pthread_mutex_lock(&f->lock); |
| req->u.ni.func = func; |
| req->u.ni.data = data; |
| if (req->interrupted && func) |
| func(req, data); |
| pthread_mutex_unlock(&f->lock); |
| } |
| |
| static struct { |
| void (*func)(fuse_req_t, fuse_ino_t, const void *); |
| const char *name; |
| } fuse_ll_ops[] = { |
| [FUSE_LOOKUP] = { do_lookup, "LOOKUP" }, |
| [FUSE_FORGET] = { do_forget, "FORGET" }, |
| [FUSE_GETATTR] = { do_getattr, "GETATTR" }, |
| [FUSE_SETATTR] = { do_setattr, "SETATTR" }, |
| [FUSE_READLINK] = { do_readlink, "READLINK" }, |
| [FUSE_SYMLINK] = { do_symlink, "SYMLINK" }, |
| [FUSE_MKNOD] = { do_mknod, "MKNOD" }, |
| [FUSE_MKDIR] = { do_mkdir, "MKDIR" }, |
| [FUSE_UNLINK] = { do_unlink, "UNLINK" }, |
| [FUSE_RMDIR] = { do_rmdir, "RMDIR" }, |
| [FUSE_RENAME] = { do_rename, "RENAME" }, |
| [FUSE_LINK] = { do_link, "LINK" }, |
| [FUSE_OPEN] = { do_open, "OPEN" }, |
| [FUSE_READ] = { do_read, "READ" }, |
| [FUSE_WRITE] = { do_write, "WRITE" }, |
| [FUSE_STATFS] = { do_statfs, "STATFS" }, |
| [FUSE_RELEASE] = { do_release, "RELEASE" }, |
| [FUSE_FSYNC] = { do_fsync, "FSYNC" }, |
| [FUSE_SETXATTR] = { do_setxattr, "SETXATTR" }, |
| [FUSE_GETXATTR] = { do_getxattr, "GETXATTR" }, |
| [FUSE_LISTXATTR] = { do_listxattr, "LISTXATTR" }, |
| [FUSE_REMOVEXATTR] = { do_removexattr, "REMOVEXATTR" }, |
| [FUSE_FLUSH] = { do_flush, "FLUSH" }, |
| [FUSE_INIT] = { do_init, "INIT" }, |
| [FUSE_OPENDIR] = { do_opendir, "OPENDIR" }, |
| [FUSE_READDIR] = { do_readdir, "READDIR" }, |
| [FUSE_RELEASEDIR] = { do_releasedir, "RELEASEDIR" }, |
| [FUSE_FSYNCDIR] = { do_fsyncdir, "FSYNCDIR" }, |
| [FUSE_GETLK] = { do_getlk, "GETLK" }, |
| [FUSE_SETLK] = { do_setlk, "SETLK" }, |
| [FUSE_SETLKW] = { do_setlkw, "SETLKW" }, |
| [FUSE_ACCESS] = { do_access, "ACCESS" }, |
| [FUSE_CREATE] = { do_create, "CREATE" }, |
| [FUSE_INTERRUPT] = { do_interrupt, "INTERRUPT" }, |
| }; |
| |
| #define FUSE_MAXOP (sizeof(fuse_ll_ops) / sizeof(fuse_ll_ops[0])) |
| |
| static const char *opname(enum fuse_opcode opcode) |
| { |
| if (opcode >= FUSE_MAXOP || !fuse_ll_ops[opcode].name) |
| return "???"; |
| else |
| return fuse_ll_ops[opcode].name; |
| } |
| |
| static void fuse_ll_process(void *data, const char *buf, size_t len, |
| struct fuse_chan *ch) |
| { |
| struct fuse_ll *f = (struct fuse_ll *) data; |
| struct fuse_in_header *in = (struct fuse_in_header *) buf; |
| const void *inarg = buf + sizeof(struct fuse_in_header); |
| struct fuse_req *req; |
| |
| if (f->debug) { |
| printf("unique: %llu, opcode: %s (%i), nodeid: %lu, insize: %i\n", |
| (unsigned long long) in->unique, |
| opname((enum fuse_opcode) in->opcode), in->opcode, |
| (unsigned long) in->nodeid, len); |
| fflush(stdout); |
| } |
| |
| req = (struct fuse_req *) calloc(1, sizeof(struct fuse_req)); |
| if (req == NULL) { |
| fprintf(stderr, "fuse: failed to allocate request\n"); |
| return; |
| } |
| |
| req->f = f; |
| req->unique = in->unique; |
| req->ctx.uid = in->uid; |
| req->ctx.gid = in->gid; |
| req->ctx.pid = in->pid; |
| req->ch = ch; |
| list_init_req(req); |
| |
| if (!f->got_init && in->opcode != FUSE_INIT) |
| fuse_reply_err(req, EIO); |
| else if (f->allow_root && in->uid != f->owner && in->uid != 0 && |
| in->opcode != FUSE_INIT && in->opcode != FUSE_READ && |
| in->opcode != FUSE_WRITE && in->opcode != FUSE_FSYNC && |
| in->opcode != FUSE_RELEASE && in->opcode != FUSE_READDIR && |
| in->opcode != FUSE_FSYNCDIR && in->opcode != FUSE_RELEASEDIR) { |
| fuse_reply_err(req, EACCES); |
| } else if (in->opcode >= FUSE_MAXOP || !fuse_ll_ops[in->opcode].func) |
| fuse_reply_err(req, ENOSYS); |
| else { |
| if (in->opcode != FUSE_INTERRUPT) { |
| struct fuse_req *intr; |
| pthread_mutex_lock(&f->lock); |
| intr = check_interrupt(f, req); |
| list_add_req(req, &f->list); |
| pthread_mutex_unlock(&f->lock); |
| if (intr) |
| fuse_reply_err(intr, EAGAIN); |
| } |
| fuse_ll_ops[in->opcode].func(req, in->nodeid, inarg); |
| } |
| } |
| |
| enum { |
| KEY_HELP, |
| KEY_VERSION, |
| }; |
| |
| static struct fuse_opt fuse_ll_opts[] = { |
| { "debug", offsetof(struct fuse_ll, debug), 1 }, |
| { "-d", offsetof(struct fuse_ll, debug), 1 }, |
| { "allow_root", offsetof(struct fuse_ll, allow_root), 1 }, |
| { "max_write=%u", offsetof(struct fuse_ll, conn.max_write), 0 }, |
| { "max_readahead=%u", offsetof(struct fuse_ll, conn.max_readahead), 0 }, |
| { "async_read", offsetof(struct fuse_ll, conn.async_read), 1 }, |
| { "sync_read", offsetof(struct fuse_ll, conn.async_read), 0 }, |
| FUSE_OPT_KEY("max_read=", FUSE_OPT_KEY_DISCARD), |
| FUSE_OPT_KEY("-h", KEY_HELP), |
| FUSE_OPT_KEY("--help", KEY_HELP), |
| FUSE_OPT_KEY("-V", KEY_VERSION), |
| FUSE_OPT_KEY("--version", KEY_VERSION), |
| FUSE_OPT_END |
| }; |
| |
| static void fuse_ll_version(void) |
| { |
| fprintf(stderr, "using FUSE kernel interface version %i.%i\n", |
| FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION); |
| } |
| |
| static void fuse_ll_help(void) |
| { |
| fprintf(stderr, |
| " -o max_write=N set maximum size of write requests\n" |
| " -o max_readahead=N set maximum readahead\n" |
| " -o async_read perform reads asynchronously (default)\n" |
| " -o sync_read perform reads synchronously\n"); |
| } |
| |
| static int fuse_ll_opt_proc(void *data, const char *arg, int key, |
| struct fuse_args *outargs) |
| { |
| (void) data; (void) outargs; |
| |
| switch (key) { |
| case KEY_HELP: |
| fuse_ll_help(); |
| break; |
| |
| case KEY_VERSION: |
| fuse_ll_version(); |
| break; |
| |
| default: |
| fprintf(stderr, "fuse: unknown option `%s'\n", arg); |
| } |
| |
| return -1; |
| } |
| |
| int fuse_lowlevel_is_lib_option(const char *opt) |
| { |
| return fuse_opt_match(fuse_ll_opts, opt); |
| } |
| |
| static void fuse_ll_destroy(void *data) |
| { |
| struct fuse_ll *f = (struct fuse_ll *) data; |
| |
| if (f->op.destroy) |
| f->op.destroy(f->userdata); |
| |
| free(f); |
| } |
| |
| /* |
| * always call fuse_lowlevel_new_common() internally, to work around a |
| * misfeature in the FreeBSD runtime linker, which links the old |
| * version of a symbol to internal references. |
| */ |
| struct fuse_session *fuse_lowlevel_new_common(struct fuse_args *args, |
| const struct fuse_lowlevel_ops *op, |
| size_t op_size, void *userdata) |
| { |
| struct fuse_ll *f; |
| struct fuse_session *se; |
| struct fuse_session_ops sop = { |
| .process = fuse_ll_process, |
| .destroy = fuse_ll_destroy, |
| }; |
| |
| if (sizeof(struct fuse_lowlevel_ops) < op_size) { |
| fprintf(stderr, "fuse: warning: library too old, some operations may not work\n"); |
| op_size = sizeof(struct fuse_lowlevel_ops); |
| } |
| |
| f = (struct fuse_ll *) calloc(1, sizeof(struct fuse_ll)); |
| if (f == NULL) { |
| fprintf(stderr, "fuse: failed to allocate fuse object\n"); |
| goto out; |
| } |
| |
| f->conn.async_read = 1; |
| f->conn.max_write = UINT_MAX; |
| f->conn.max_readahead = UINT_MAX; |
| list_init_req(&f->list); |
| list_init_req(&f->interrupts); |
| fuse_mutex_init(&f->lock); |
| |
| if (fuse_opt_parse(args, f, fuse_ll_opts, fuse_ll_opt_proc) == -1) |
| goto out_free; |
| |
| memcpy(&f->op, op, op_size); |
| f->owner = getuid(); |
| f->userdata = userdata; |
| |
| se = fuse_session_new(&sop, f); |
| if (!se) |
| goto out_free; |
| |
| return se; |
| |
| out_free: |
| free(f); |
| out: |
| return NULL; |
| } |
| |
| |
| struct fuse_session *fuse_lowlevel_new(struct fuse_args *args, |
| const struct fuse_lowlevel_ops *op, |
| size_t op_size, void *userdata) |
| { |
| return fuse_lowlevel_new_common(args, op, op_size, userdata); |
| } |
| |
| |
| #include "fuse_lowlevel_compat.h" |
| |
| #ifndef __FreeBSD__ |
| |
| static void fill_open_compat(struct fuse_open_out *arg, |
| const struct fuse_file_info_compat *f) |
| { |
| arg->fh = f->fh; |
| if (f->direct_io) |
| arg->open_flags |= FOPEN_DIRECT_IO; |
| if (f->keep_cache) |
| arg->open_flags |= FOPEN_KEEP_CACHE; |
| } |
| |
| static void convert_statfs_compat(const struct statfs *compatbuf, |
| struct statvfs *buf) |
| { |
| buf->f_bsize = compatbuf->f_bsize; |
| buf->f_blocks = compatbuf->f_blocks; |
| buf->f_bfree = compatbuf->f_bfree; |
| buf->f_bavail = compatbuf->f_bavail; |
| buf->f_files = compatbuf->f_files; |
| buf->f_ffree = compatbuf->f_ffree; |
| buf->f_namemax = compatbuf->f_namelen; |
| } |
| |
| int fuse_reply_open_compat(fuse_req_t req, |
| const struct fuse_file_info_compat *f) |
| { |
| struct fuse_open_out arg; |
| |
| memset(&arg, 0, sizeof(arg)); |
| fill_open_compat(&arg, f); |
| return send_reply_ok(req, &arg, sizeof(arg)); |
| } |
| |
| int fuse_reply_statfs_compat(fuse_req_t req, const struct statfs *stbuf) |
| { |
| struct statvfs newbuf; |
| |
| memset(&newbuf, 0, sizeof(newbuf)); |
| convert_statfs_compat(stbuf, &newbuf); |
| |
| return fuse_reply_statfs(req, &newbuf); |
| } |
| |
| struct fuse_session *fuse_lowlevel_new_compat(const char *opts, |
| const struct fuse_lowlevel_ops *op, |
| size_t op_size, void *userdata) |
| { |
| struct fuse_session *se; |
| struct fuse_args args = FUSE_ARGS_INIT(0, NULL); |
| |
| if (opts && |
| (fuse_opt_add_arg(&args, "") == -1 || |
| fuse_opt_add_arg(&args, "-o") == -1 || |
| fuse_opt_add_arg(&args, opts) == -1)) { |
| fuse_opt_free_args(&args); |
| return NULL; |
| } |
| se = fuse_lowlevel_new(&args, op, op_size, userdata); |
| fuse_opt_free_args(&args); |
| |
| return se; |
| } |
| |
| struct fuse_ll_compat_conf { |
| unsigned max_read; |
| int set_max_read; |
| }; |
| |
| static const struct fuse_opt fuse_ll_opts_compat[] = { |
| { "max_read=", offsetof(struct fuse_ll_compat_conf, set_max_read), 1 }, |
| { "max_read=%u", offsetof(struct fuse_ll_compat_conf, max_read), 0 }, |
| FUSE_OPT_KEY("max_read=", FUSE_OPT_KEY_KEEP), |
| FUSE_OPT_END |
| }; |
| |
| int fuse_sync_compat_args(struct fuse_args *args) |
| { |
| struct fuse_ll_compat_conf conf; |
| |
| memset(&conf, 0, sizeof(conf)); |
| if (fuse_opt_parse(args, &conf, fuse_ll_opts_compat, NULL) == -1) |
| return -1; |
| |
| if (fuse_opt_insert_arg(args, 1, "-osync_read")) |
| return -1; |
| |
| if (conf.set_max_read) { |
| char tmpbuf[64]; |
| |
| sprintf(tmpbuf, "-omax_readahead=%u", conf.max_read); |
| if (fuse_opt_insert_arg(args, 1, tmpbuf) == -1) |
| return -1; |
| } |
| return 0; |
| } |
| |
| __asm__(".symver fuse_reply_statfs_compat,fuse_reply_statfs@FUSE_2.4"); |
| __asm__(".symver fuse_reply_open_compat,fuse_reply_open@FUSE_2.4"); |
| __asm__(".symver fuse_lowlevel_new_compat,fuse_lowlevel_new@FUSE_2.4"); |
| |
| #else /* __FreeBSD__ */ |
| |
| int fuse_sync_compat_args(struct fuse_args *args) |
| { |
| (void) args; |
| return 0; |
| } |
| |
| #endif /* __FreeBSD__ */ |
| |
| struct fuse_session *fuse_lowlevel_new_compat25(struct fuse_args *args, |
| const struct fuse_lowlevel_ops_compat25 *op, |
| size_t op_size, void *userdata) |
| { |
| if (fuse_sync_compat_args(args) == -1) |
| return NULL; |
| |
| return fuse_lowlevel_new_common(args, |
| (const struct fuse_lowlevel_ops *) op, |
| op_size, userdata); |
| } |
| |
| __asm__(".symver fuse_lowlevel_new_compat25,fuse_lowlevel_new@FUSE_2.5"); |