示例#1
0
static int handle_opendir(struct fuse* fuse, struct fuse_handler* handler,
        const struct fuse_in_header* hdr, const struct fuse_open_in* req)
{
    struct node* node;
    char path[PATH_MAX];
    struct fuse_open_out out;
    struct dirhandle *h;

    pthread_mutex_lock(&fuse->lock);
    node = lookup_node_and_path_by_id_locked(fuse, hdr->nodeid, path, sizeof(path));
    TRACE("[%d] OPENDIR @ %llx (%s)\n", handler->token,
            hdr->nodeid, node ? node->name : "?");
    pthread_mutex_unlock(&fuse->lock);

    if (!node) {
        return -ENOENT;
    }
    h = malloc(sizeof(*h));
    if (!h) {
        return -ENOMEM;
    }
    TRACE("[%d] OPENDIR %s\n", handler->token, path);
    h->d = opendir(path);
    if (!h->d) {
        free(h);
        return -errno;
    }
    out.fh = ptr_to_id(h);
    fuse_reply(fuse, hdr->unique, &out, sizeof(out));
    return NO_STATUS;
}
示例#2
0
static int handle_readdir(struct fuse* fuse, struct fuse_handler* handler,
        const struct fuse_in_header* hdr, const struct fuse_read_in* req)
{
    char buffer[8192];
    struct fuse_dirent *fde = (struct fuse_dirent*) buffer;
    struct dirent *de;
    struct dirhandle *h = id_to_ptr(req->fh);

    TRACE("[%d] READDIR %p\n", handler->token, h);
    if (req->offset == 0) {
        /* rewinddir() might have been called above us, so rewind here too */
        TRACE("[%d] calling rewinddir()\n", handler->token);
        rewinddir(h->d);
    }
    de = readdir(h->d);
    if (!de) {
        return 0;
    }
    fde->ino = FUSE_UNKNOWN_INO;
    /* increment the offset so we can detect when rewinddir() seeks back to the beginning */
    fde->off = req->offset + 1;
    fde->type = de->d_type;
    fde->namelen = strlen(de->d_name);
    memcpy(fde->name, de->d_name, fde->namelen + 1);
    fuse_reply(fuse, hdr->unique, fde,
            FUSE_DIRENT_ALIGN(sizeof(struct fuse_dirent) + fde->namelen));
    return NO_STATUS;
}
示例#3
0
static int handle_read(struct fuse* fuse, struct fuse_handler* handler,
        const struct fuse_in_header* hdr, const struct fuse_read_in* req)
{
    struct handle *h = id_to_ptr(req->fh);
    __u64 unique = hdr->unique;
    __u32 size = req->size;
    __u64 offset = req->offset;
    int res;

    /* Don't access any other fields of hdr or req beyond this point, the read buffer
     * overlaps the request buffer and will clobber data in the request.  This
     * saves us 128KB per request handler thread at the cost of this scary comment. */

    TRACE("[%d] READ %p(%d) %u@%llu\n", handler->token,
            h, h->fd, size, offset);
    if (size > sizeof(handler->read_buffer)) {
        return -EINVAL;
    }
    res = pread64(h->fd, handler->read_buffer, size, offset);
    if (res < 0) {
        return -errno;
    }
    fuse_reply(fuse, unique, handler->read_buffer, res);
    return NO_STATUS;
}
示例#4
0
static int handle_statfs(struct fuse* fuse, struct fuse_handler* handler,
        const struct fuse_in_header* hdr)
{
    char path[PATH_MAX];
    struct statfs stat;
    struct fuse_statfs_out out;
    int res;

    pthread_mutex_lock(&fuse->lock);
    TRACE("[%d] STATFS\n", handler->token);
    res = get_node_path_locked(&fuse->root, path, sizeof(path));
    pthread_mutex_unlock(&fuse->lock);
    if (res < 0) {
        return -ENOENT;
    }
    if (statfs(fuse->root.name, &stat) < 0) {
        return -errno;
    }
    memset(&out, 0, sizeof(out));
    out.st.blocks = stat.f_blocks;
    out.st.bfree = stat.f_bfree;
    out.st.bavail = stat.f_bavail;
    out.st.files = stat.f_files;
    out.st.ffree = stat.f_ffree;
    out.st.bsize = stat.f_bsize;
    out.st.namelen = stat.f_namelen;
    out.st.frsize = stat.f_frsize;
    fuse_reply(fuse, hdr->unique, &out, sizeof(out));
    return NO_STATUS;
}
示例#5
0
static int fuse_reply_entry(struct fuse* fuse, __u64 unique,
        struct node* parent, const char* name, const char* actual_name,
        const char* path)
{
    struct node* node;
    struct fuse_entry_out out;
    struct stat s;

    if (lstat(path, &s) < 0) {
        return -errno;
    }

    pthread_mutex_lock(&fuse->lock);
    node = acquire_or_create_child_locked(fuse, parent, name, actual_name);
    if (!node) {
        pthread_mutex_unlock(&fuse->lock);
        return -ENOMEM;
    }
    memset(&out, 0, sizeof(out));
    attr_from_stat(&out.attr, &s, node->nid);
    out.attr_valid = 10;
    out.entry_valid = 10;
    out.nodeid = node->nid;
    out.generation = node->gen;
    pthread_mutex_unlock(&fuse->lock);
    fuse_reply(fuse, unique, &out, sizeof(out));
    return NO_STATUS;
}
static int handle_open(void* /* data */, struct fuse_data* fd, const struct fuse_in_header* hdr) {
    if (hdr->nodeid != PACKAGE_FILE_ID) return -ENOENT;

    struct fuse_open_out out;
    memset(&out, 0, sizeof(out));
    out.fh = 10;  // an arbitrary number; we always use the same handle
    fuse_reply(fd, hdr->unique, &out, sizeof(out));
    return NO_STATUS;
}
示例#7
0
static int fuse_reply_attr(struct fuse* fuse, __u64 unique, __u64 nid,
        const char* path)
{
    struct fuse_attr_out out;
    struct stat s;

    if (lstat(path, &s) < 0) {
        return -errno;
    }
    memset(&out, 0, sizeof(out));
    attr_from_stat(&out.attr, &s, nid);
    out.attr_valid = 10;
    fuse_reply(fuse, unique, &out, sizeof(out));
    return NO_STATUS;
}
示例#8
0
static int handle_init(void* data, struct fuse_data* fd, const struct fuse_in_header* hdr) {
    const struct fuse_init_in* req = data;
    struct fuse_init_out out;

    out.major = FUSE_KERNEL_VERSION;
    out.minor = FUSE_KERNEL_MINOR_VERSION;
    out.max_readahead = req->max_readahead;
    out.flags = 0;
    out.max_background = 32;
    out.congestion_threshold = 32;
    out.max_write = 4096;
    fuse_reply(fd, hdr->unique, &out, sizeof(out));

    return NO_STATUS;
}
static int handle_getattr(void* /* data */, struct fuse_data* fd, const struct fuse_in_header* hdr) {
    struct fuse_attr_out out;
    memset(&out, 0, sizeof(out));
    out.attr_valid = 10;

    if (hdr->nodeid == FUSE_ROOT_ID) {
        fill_attr(&(out.attr), fd, hdr->nodeid, 4096, S_IFDIR | 0555);
    } else if (hdr->nodeid == PACKAGE_FILE_ID) {
        fill_attr(&(out.attr), fd, PACKAGE_FILE_ID, fd->file_size, S_IFREG | 0444);
    } else {
        return -ENOENT;
    }

    fuse_reply(fd, hdr->unique, &out, sizeof(out));
    return NO_STATUS;
}
示例#10
0
static int handle_init(struct fuse* fuse, struct fuse_handler* handler,
        const struct fuse_in_header* hdr, const struct fuse_init_in* req)
{
    struct fuse_init_out out;

    TRACE("[%d] INIT ver=%d.%d maxread=%d flags=%x\n",
            handler->token, req->major, req->minor, req->max_readahead, req->flags);
    out.major = FUSE_KERNEL_VERSION;
    out.minor = FUSE_KERNEL_MINOR_VERSION;
    out.max_readahead = req->max_readahead;
    out.flags = FUSE_ATOMIC_O_TRUNC | FUSE_BIG_WRITES;
    out.max_background = 32;
    out.congestion_threshold = 32;
    out.max_write = MAX_WRITE;
    fuse_reply(fuse, hdr->unique, &out, sizeof(out));
    return NO_STATUS;
}
示例#11
0
static int handle_write(struct fuse* fuse, struct fuse_handler* handler,
        const struct fuse_in_header* hdr, const struct fuse_write_in* req,
        const void* buffer)
{
    struct fuse_write_out out;
    struct handle *h = id_to_ptr(req->fh);
    int res;

    TRACE("[%d] WRITE %p(%d) %u@%llu\n", handler->token,
            h, h->fd, req->size, req->offset);
    res = pwrite64(h->fd, buffer, req->size, req->offset);
    if (res < 0) {
        return -errno;
    }
    out.size = res;
    fuse_reply(fuse, hdr->unique, &out, sizeof(out));
    return NO_STATUS;
}
示例#12
0
static int handle_lookup(void* data, struct fuse_data* fd,
                         const struct fuse_in_header* hdr) {
    struct fuse_entry_out out;
    memset(&out, 0, sizeof(out));
    out.entry_valid = 10;
    out.attr_valid = 10;

    if (strncmp(FUSE_SIDELOAD_HOST_FILENAME, reinterpret_cast<const char*>(data),
                sizeof(FUSE_SIDELOAD_HOST_FILENAME)) == 0) {
        out.nodeid = PACKAGE_FILE_ID;
        out.generation = PACKAGE_FILE_ID;
        fill_attr(&(out.attr), fd, PACKAGE_FILE_ID, fd->file_size, S_IFREG | 0444);
    } else {
        return -ENOENT;
    }

    fuse_reply(fd, hdr->unique, &out, sizeof(out));
    return NO_STATUS;
}
示例#13
0
static int handle_init(void* data, struct fuse_data* fd, const struct fuse_in_header* hdr) {
    const struct fuse_init_in* req = reinterpret_cast<const struct fuse_init_in*>(data);
    struct fuse_init_out out;
    size_t fuse_struct_size;


    /* Kernel 2.6.16 is the first stable kernel with struct fuse_init_out
     * defined (fuse version 7.6). The structure is the same from 7.6 through
     * 7.22. Beginning with 7.23, the structure increased in size and added
     * new parameters.
     */
    if (req->major != FUSE_KERNEL_VERSION || req->minor < 6) {
        printf("Fuse kernel version mismatch: Kernel version %d.%d, Expected at least %d.6",
               req->major, req->minor, FUSE_KERNEL_VERSION);
        return -1;
    }

    out.minor = MIN(req->minor, FUSE_KERNEL_MINOR_VERSION);
    fuse_struct_size = sizeof(out);
#if defined(FUSE_COMPAT_22_INIT_OUT_SIZE)
    /* FUSE_KERNEL_VERSION >= 23. */

    /* If the kernel only works on minor revs older than or equal to 22,
     * then use the older structure size since this code only uses the 7.22
     * version of the structure. */
    if (req->minor <= 22) {
        fuse_struct_size = FUSE_COMPAT_22_INIT_OUT_SIZE;
    }
#endif

    out.major = FUSE_KERNEL_VERSION;
    out.max_readahead = req->max_readahead;
    out.flags = 0;
    out.max_background = 32;
    out.congestion_threshold = 32;
    out.max_write = 4096;
    fuse_reply(fd, hdr->unique, &out, fuse_struct_size);

    return NO_STATUS;
}
示例#14
0
void lookup_entry(struct fuse *fuse, struct node *node,
                  const char *name, __u64 unique)
{
    struct fuse_entry_out out;
    
    memset(&out, 0, sizeof(out));

    node = node_lookup(fuse, node, name, &out.attr);
    if (!node) {
        fuse_status(fuse, unique, -ENOENT);
        return;
    }
    
    node->refcount++;
//    fprintf(stderr,"ACQUIRE %p (%s) rc=%d\n", node, node->name, node->refcount);
    out.nodeid = node->nid;
    out.generation = node->gen;
    out.entry_valid = 10;
    out.attr_valid = 10;
    
    fuse_reply(fuse, unique, &out, sizeof(out));
}
示例#15
0
void handle_fuse_request(struct fuse *fuse, struct fuse_in_header *hdr, void *data, unsigned len)
{
    struct node *node;

    if ((len < sizeof(*hdr)) || (hdr->len != len)) {
        ERROR("malformed header\n");
        return;
    }

    len -= hdr->len;

    if (hdr->nodeid) {
        node = lookup_by_inode(fuse, hdr->nodeid);
        if (!node) {
            fuse_status(fuse, hdr->unique, -ENOENT);
            return;
        }
    } else {
        node = 0;
    }

    switch (hdr->opcode) {
    case FUSE_LOOKUP: { /* bytez[] -> entry_out */
        TRACE("LOOKUP %llx %s\n", hdr->nodeid, (char*) data);
        lookup_entry(fuse, node, (char*) data, hdr->unique);
        return;
    }
    case FUSE_FORGET: {
        struct fuse_forget_in *req = data;
        TRACE("FORGET %llx (%s) #%lld\n", hdr->nodeid, node->name, req->nlookup);
            /* no reply */
        while (req->nlookup--)
            node_release(node);
        return;
    }
    case FUSE_GETATTR: { /* getattr_in -> attr_out */
        struct fuse_getattr_in *req = data;
        struct fuse_attr_out out;

        TRACE("GETATTR flags=%x fh=%llx\n", req->getattr_flags, req->fh);

        memset(&out, 0, sizeof(out));
        node_get_attr(node, &out.attr);
        out.attr_valid = 10;

        fuse_reply(fuse, hdr->unique, &out, sizeof(out));
        return;
    }
    case FUSE_SETATTR: { /* setattr_in -> attr_out */
        struct fuse_setattr_in *req = data;
        struct fuse_attr_out out;
        char *path, buffer[PATH_BUFFER_SIZE];
        int res = 0;
        struct timespec times[2];

        TRACE("SETATTR fh=%llx id=%llx valid=%x\n",
              req->fh, hdr->nodeid, req->valid);

        /* XXX: incomplete implementation on purpose.   chmod/chown
         * should NEVER be implemented.*/

        path = node_get_path(node, buffer, 0);
        if (req->valid & FATTR_SIZE)
            res = truncate(path, req->size);
        if (res)
            goto getout;

        /* Handle changing atime and mtime.  If FATTR_ATIME_and FATTR_ATIME_NOW
         * are both set, then set it to the current time.  Else, set it to the
         * time specified in the request.  Same goes for mtime.  Use utimensat(2)
         * as it allows ATIME and MTIME to be changed independently, and has
         * nanosecond resolution which fuse also has.
         */
        if (req->valid & (FATTR_ATIME | FATTR_MTIME)) {
            times[0].tv_nsec = UTIME_OMIT;
            times[1].tv_nsec = UTIME_OMIT;
            if (req->valid & FATTR_ATIME) {
                if (req->valid & FATTR_ATIME_NOW) {
                  times[0].tv_nsec = UTIME_NOW;
                } else {
                  times[0].tv_sec = req->atime;
                  times[0].tv_nsec = req->atimensec;
                }
            }
            if (req->valid & FATTR_MTIME) {
                if (req->valid & FATTR_MTIME_NOW) {
                  times[1].tv_nsec = UTIME_NOW;
                } else {
                  times[1].tv_sec = req->mtime;
                  times[1].tv_nsec = req->mtimensec;
                }
            }
            TRACE("Calling utimensat on %s with atime %ld, mtime=%ld\n", path, times[0].tv_sec, times[1].tv_sec);
            res = utimensat(-1, path, times, 0);
        }

        getout:
        memset(&out, 0, sizeof(out));
        node_get_attr(node, &out.attr);
        out.attr_valid = 10;

        if (res)
            fuse_status(fuse, hdr->unique, -errno);
        else
            fuse_reply(fuse, hdr->unique, &out, sizeof(out));
        return;
    }
//    case FUSE_READLINK:
//    case FUSE_SYMLINK:
    case FUSE_MKNOD: { /* mknod_in, bytez[] -> entry_out */
        struct fuse_mknod_in *req = data;
        char *path, buffer[PATH_BUFFER_SIZE];
        char *name = ((char*) data) + sizeof(*req);
        int res;

        TRACE("MKNOD %s @ %llx\n", name, hdr->nodeid);
        path = node_get_path(node, buffer, name);

        req->mode = (req->mode & (~0777)) | 0664;
        res = mknod(path, req->mode, req->rdev); /* XXX perm?*/
        if (res < 0) {
            fuse_status(fuse, hdr->unique, -errno);
        } else {
            lookup_entry(fuse, node, name, hdr->unique);
        }
        return;
    }
    case FUSE_MKDIR: { /* mkdir_in, bytez[] -> entry_out */
        struct fuse_mkdir_in *req = data;
        struct fuse_entry_out out;
        char *path, buffer[PATH_BUFFER_SIZE];
        char *name = ((char*) data) + sizeof(*req);
        int res;

        TRACE("MKDIR %s @ %llx 0%o\n", name, hdr->nodeid, req->mode);
        path = node_get_path(node, buffer, name);

        req->mode = (req->mode & (~0777)) | 0775;
        res = mkdir(path, req->mode);
        if (res < 0) {
            fuse_status(fuse, hdr->unique, -errno);
        } else {
            lookup_entry(fuse, node, name, hdr->unique);
        }
        return;
    }
    case FUSE_UNLINK: { /* bytez[] -> */
        char *path, buffer[PATH_BUFFER_SIZE];
        int res;
        TRACE("UNLINK %s @ %llx\n", (char*) data, hdr->nodeid);
        path = node_get_path(node, buffer, (char*) data);
        res = unlink(path);
        fuse_status(fuse, hdr->unique, res ? -errno : 0);
        return;
    }
    case FUSE_RMDIR: { /* bytez[] -> */
        char *path, buffer[PATH_BUFFER_SIZE];
        int res;
        TRACE("RMDIR %s @ %llx\n", (char*) data, hdr->nodeid);
        path = node_get_path(node, buffer, (char*) data);
        res = rmdir(path);
        fuse_status(fuse, hdr->unique, res ? -errno : 0);
        return;
    }
    case FUSE_RENAME: { /* rename_in, oldname, newname ->  */
        struct fuse_rename_in *req = data;
        char *oldname = ((char*) data) + sizeof(*req);
        char *newname = oldname + strlen(oldname) + 1;
        char *oldpath, oldbuffer[PATH_BUFFER_SIZE];
        char *newpath, newbuffer[PATH_BUFFER_SIZE];
        struct node *target;
        struct node *newparent;
        int res;

        TRACE("RENAME %s->%s @ %llx\n", oldname, newname, hdr->nodeid);

        target = lookup_child_by_name(node, oldname);
        if (!target) {
            fuse_status(fuse, hdr->unique, -ENOENT);
            return;
        }
        oldpath = node_get_path(node, oldbuffer, oldname);

        newparent = lookup_by_inode(fuse, req->newdir);
        if (!newparent) {
            fuse_status(fuse, hdr->unique, -ENOENT);
            return;
        }
        if (newparent == node) {
            /* Special case for renaming a file where destination
             * is same path differing only by case.
             * In this case we don't want to look for a case insensitive match.
             * This allows commands like "mv foo FOO" to work as expected.
             */
            newpath = do_node_get_path(newparent, newbuffer, newname, NO_CASE_SENSITIVE_MATCH);
        } else {
            newpath = node_get_path(newparent, newbuffer, newname);
        }

        if (!remove_child(node, target->nid)) {
            ERROR("RENAME remove_child not found");
            fuse_status(fuse, hdr->unique, -ENOENT);
            return;
        }
        if (!rename_node(target, newname)) {
            fuse_status(fuse, hdr->unique, -ENOMEM);
            return;
        }
        add_node_to_parent(target, newparent);

        res = rename(oldpath, newpath);
        TRACE("RENAME result %d\n", res);

        fuse_status(fuse, hdr->unique, res ? -errno : 0);
        return;
    }
//    case FUSE_LINK:        
    case FUSE_OPEN: { /* open_in -> open_out */
        struct fuse_open_in *req = data;
        struct fuse_open_out out;
        char *path, buffer[PATH_BUFFER_SIZE];
        struct handle *h;

        h = malloc(sizeof(*h));
        if (!h) {
            fuse_status(fuse, hdr->unique, -ENOMEM);
            return;
        }

        path = node_get_path(node, buffer, 0);
        TRACE("OPEN %llx '%s' 0%o fh=%p\n", hdr->nodeid, path, req->flags, h);
        h->fd = open(path, req->flags);
        if (h->fd < 0) {
            ERROR("ERROR\n");
            fuse_status(fuse, hdr->unique, -errno);
            free(h);
            return;
        }
        out.fh = ptr_to_id(h);
        out.open_flags = 0;
        out.padding = 0;
        fuse_reply(fuse, hdr->unique, &out, sizeof(out));
        return;
    }
    case FUSE_READ: { /* read_in -> byte[] */
        char buffer[128 * 1024];
        struct fuse_read_in *req = data;
        struct handle *h = id_to_ptr(req->fh);
        int res;
        TRACE("READ %p(%d) %u@%llu\n", h, h->fd, req->size, req->offset);
        if (req->size > sizeof(buffer)) {
            fuse_status(fuse, hdr->unique, -EINVAL);
            return;
        }
        res = pread64(h->fd, buffer, req->size, req->offset);
        if (res < 0) {
            fuse_status(fuse, hdr->unique, -errno);
            return;
        }
        fuse_reply(fuse, hdr->unique, buffer, res);
        return;
    }
    case FUSE_WRITE: { /* write_in, byte[write_in.size] -> write_out */
        struct fuse_write_in *req = data;
        struct fuse_write_out out;
        struct handle *h = id_to_ptr(req->fh);
        int res;
        TRACE("WRITE %p(%d) %u@%llu\n", h, h->fd, req->size, req->offset);
        res = pwrite64(h->fd, ((char*) data) + sizeof(*req), req->size, req->offset);
        if (res < 0) {
            fuse_status(fuse, hdr->unique, -errno);
            return;
        }
        out.size = res;
        fuse_reply(fuse, hdr->unique, &out, sizeof(out));
        goto oops;
    }
    case FUSE_STATFS: { /* getattr_in -> attr_out */
        struct statfs stat;
        struct fuse_statfs_out out;
        int res;

        TRACE("STATFS\n");

        if (statfs(fuse->root.name, &stat)) {
            fuse_status(fuse, hdr->unique, -errno);
            return;
        }

        memset(&out, 0, sizeof(out));
        out.st.blocks = stat.f_blocks;
        out.st.bfree = stat.f_bfree;
        out.st.bavail = stat.f_bavail;
        out.st.files = stat.f_files;
        out.st.ffree = stat.f_ffree;
        out.st.bsize = stat.f_bsize;
        out.st.namelen = stat.f_namelen;
        out.st.frsize = stat.f_frsize;
        fuse_reply(fuse, hdr->unique, &out, sizeof(out));
        return;
    }
    case FUSE_RELEASE: { /* release_in -> */
        struct fuse_release_in *req = data;
        struct handle *h = id_to_ptr(req->fh);
        TRACE("RELEASE %p(%d)\n", h, h->fd);
        close(h->fd);
        free(h);
        fuse_status(fuse, hdr->unique, 0);
        return;
    }
//    case FUSE_FSYNC:
//    case FUSE_SETXATTR:
//    case FUSE_GETXATTR:
//    case FUSE_LISTXATTR:
//    case FUSE_REMOVEXATTR:
    case FUSE_FLUSH:
        fuse_status(fuse, hdr->unique, 0);
        return;
    case FUSE_OPENDIR: { /* open_in -> open_out */
        struct fuse_open_in *req = data;
        struct fuse_open_out out;
        char *path, buffer[PATH_BUFFER_SIZE];
        struct dirhandle *h;

        h = malloc(sizeof(*h));
        if (!h) {
            fuse_status(fuse, hdr->unique, -ENOMEM);
            return;
        }

        path = node_get_path(node, buffer, 0);
        TRACE("OPENDIR %llx '%s'\n", hdr->nodeid, path);
        h->d = opendir(path);
        if (h->d == 0) {
            ERROR("ERROR\n");
            fuse_status(fuse, hdr->unique, -errno);
            free(h);
            return;
        }
        out.fh = ptr_to_id(h);
        fuse_reply(fuse, hdr->unique, &out, sizeof(out));
        return;
    }
    case FUSE_READDIR: {
        struct fuse_read_in *req = data;
        char buffer[8192];
        struct fuse_dirent *fde = (struct fuse_dirent*) buffer;
        struct dirent *de;
        struct dirhandle *h = id_to_ptr(req->fh);
        TRACE("READDIR %p\n", h);
        if (req->offset == 0) {
            /* rewinddir() might have been called above us, so rewind here too */
            TRACE("calling rewinddir()\n");
            rewinddir(h->d);
        }
        de = readdir(h->d);
        if (!de) {
            fuse_status(fuse, hdr->unique, 0);
            return;
        }
        fde->ino = FUSE_UNKNOWN_INO;
        /* increment the offset so we can detect when rewinddir() seeks back to the beginning */
        fde->off = req->offset + 1;
        fde->type = de->d_type;
        fde->namelen = strlen(de->d_name);
        memcpy(fde->name, de->d_name, fde->namelen + 1);
        fuse_reply(fuse, hdr->unique, fde,
                   FUSE_DIRENT_ALIGN(sizeof(struct fuse_dirent) + fde->namelen));
        return;
    }
    case FUSE_RELEASEDIR: { /* release_in -> */
        struct fuse_release_in *req = data;
        struct dirhandle *h = id_to_ptr(req->fh);
        TRACE("RELEASEDIR %p\n",h);
        closedir(h->d);
        free(h);
        fuse_status(fuse, hdr->unique, 0);
        return;
    }
//    case FUSE_FSYNCDIR:
    case FUSE_INIT: { /* init_in -> init_out */
        struct fuse_init_in *req = data;
        struct fuse_init_out out;
        
        TRACE("INIT ver=%d.%d maxread=%d flags=%x\n",
                req->major, req->minor, req->max_readahead, req->flags);

        out.major = FUSE_KERNEL_VERSION;
        out.minor = FUSE_KERNEL_MINOR_VERSION;
        out.max_readahead = req->max_readahead;
        out.flags = FUSE_ATOMIC_O_TRUNC | FUSE_BIG_WRITES;
        out.max_background = 32;
        out.congestion_threshold = 32;
        out.max_write = 256 * 1024;

        fuse_reply(fuse, hdr->unique, &out, sizeof(out));
        return;
    }
    default: {
        struct fuse_out_header h;
        ERROR("NOTIMPL op=%d uniq=%llx nid=%llx\n",
                hdr->opcode, hdr->unique, hdr->nodeid);

        oops:
        h.len = sizeof(h);
        h.error = -ENOSYS;
        h.unique = hdr->unique;
        write(fuse->fd, &h, sizeof(h));
        break;
    }
    }   
}