--- /dev/null
+#include <errno.h>
+#include <float.h>
+#include <getopt.h>
+#include <stdio.h>
+#include <sys/statvfs.h>
+
+#include <fuse_lowlevel.h>
+
+#include "cmds.h"
+#include "libbcachefs.h"
+#include "tools-util.h"
+
+#include "libbcachefs/bcachefs.h"
+#include "libbcachefs/btree_iter.h"
+#include "libbcachefs/buckets.h"
+#include "libbcachefs/dirent.h"
+#include "libbcachefs/error.h"
+#include "libbcachefs/fs-common.h"
+#include "libbcachefs/inode.h"
+#include "libbcachefs/opts.h"
+#include "libbcachefs/super.h"
+
+/* mode_to_type(): */
+#include "libbcachefs/fs.h"
+
+#include <linux/dcache.h>
+
+/* XXX cut and pasted from fsck.c */
+#define QSTR(n) { { { .len = strlen(n) } }, .name = n }
+
+static inline u64 map_root_ino(u64 ino)
+{
+ return ino == 1 ? 4096 : ino;
+}
+
+static inline u64 unmap_root_ino(u64 ino)
+{
+ return ino == 4096 ? 1 : ino;
+}
+
+static struct stat inode_to_stat(struct bch_fs *c,
+ struct bch_inode_unpacked *bi)
+{
+ return (struct stat) {
+ .st_size = bi->bi_size,
+ .st_mode = bi->bi_mode,
+ .st_uid = bi->bi_uid,
+ .st_gid = bi->bi_gid,
+ .st_nlink = bch2_inode_nlink_get(bi),
+ .st_rdev = bi->bi_dev,
+ .st_blksize = block_bytes(c),
+ .st_blocks = bi->bi_sectors,
+ .st_atim = bch2_time_to_timespec(c, bi->bi_atime),
+ .st_mtim = bch2_time_to_timespec(c, bi->bi_mtime),
+ .st_ctim = bch2_time_to_timespec(c, bi->bi_ctime),
+ };
+}
+
+static struct fuse_entry_param inode_to_entry(struct bch_fs *c,
+ struct bch_inode_unpacked *bi)
+{
+ return (struct fuse_entry_param) {
+ .ino = bi->bi_inum,
+ .generation = bi->bi_generation,
+ .attr = inode_to_stat(c, bi),
+ .attr_timeout = DBL_MAX,
+ .entry_timeout = DBL_MAX,
+ };
+}
+
+static void bcachefs_fuse_destroy(void *arg)
+{
+ struct bch_fs *c = arg;
+
+ bch2_fs_stop(c);
+}
+
+static void bcachefs_fuse_lookup(fuse_req_t req, fuse_ino_t dir,
+ const char *name)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+ struct bch_inode_unpacked bi;
+ struct qstr qstr = QSTR(name);
+ u64 inum;
+ int ret;
+
+ dir = map_root_ino(dir);
+
+ pr_info("dir %llu name %s", (u64) dir, name);
+
+ inum = bch2_dirent_lookup(c, dir, &qstr);
+ if (!inum) {
+ ret = -ENOENT;
+ goto err;
+ }
+
+ ret = bch2_inode_find_by_inum(c, inum, &bi);
+ if (ret)
+ goto err;
+
+ bi.bi_inum = unmap_root_ino(bi.bi_inum);
+
+ struct fuse_entry_param e = inode_to_entry(c, &bi);
+ fuse_reply_entry(req, &e);
+ return;
+err:
+ fuse_reply_err(req, -ret);
+}
+
+static void bcachefs_fuse_getattr(fuse_req_t req, fuse_ino_t inum,
+ struct fuse_file_info *fi)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+ struct bch_inode_unpacked bi;
+ struct stat attr;
+ int ret;
+
+ inum = map_root_ino(inum);
+
+ pr_info("inum %llu", (u64) inum);
+
+ ret = bch2_inode_find_by_inum(c, inum, &bi);
+ if (ret) {
+ fuse_reply_err(req, -ret);
+ return;
+ }
+
+ bi.bi_inum = unmap_root_ino(bi.bi_inum);
+
+ attr = inode_to_stat(c, &bi);
+ fuse_reply_attr(req, &attr, DBL_MAX);
+}
+
+static void bcachefs_fuse_setattr(fuse_req_t req, fuse_ino_t inum,
+ struct stat *attr, int to_set,
+ struct fuse_file_info *fi)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+ struct bch_inode_unpacked inode_u;
+ struct btree_trans trans;
+ struct btree_iter *iter;
+ u64 now;
+ int ret;
+
+ inum = map_root_ino(inum);
+
+ bch2_trans_init(&trans, c, 0, 0);
+retry:
+ bch2_trans_begin(&trans);
+ now = bch2_current_time(c);
+
+ iter = bch2_inode_peek(&trans, &inode_u, inum, BTREE_ITER_INTENT);
+ ret = PTR_ERR_OR_ZERO(iter);
+ if (ret)
+ goto err;
+
+ if (to_set & FUSE_SET_ATTR_MODE)
+ inode_u.bi_mode = attr->st_mode;
+ if (to_set & FUSE_SET_ATTR_UID)
+ inode_u.bi_uid = attr->st_uid;
+ if (to_set & FUSE_SET_ATTR_GID)
+ inode_u.bi_gid = attr->st_gid;
+ if (to_set & FUSE_SET_ATTR_SIZE)
+ inode_u.bi_size = attr->st_size;
+ if (to_set & FUSE_SET_ATTR_ATIME)
+ inode_u.bi_atime = timespec_to_bch2_time(c, attr->st_atim);
+ if (to_set & FUSE_SET_ATTR_MTIME)
+ inode_u.bi_mtime = timespec_to_bch2_time(c, attr->st_mtim);
+ if (to_set & FUSE_SET_ATTR_ATIME_NOW)
+ inode_u.bi_atime = now;
+ if (to_set & FUSE_SET_ATTR_MTIME_NOW)
+ inode_u.bi_mtime = now;
+
+ ret = bch2_inode_write(&trans, iter, &inode_u) ?:
+ bch2_trans_commit(&trans, NULL, NULL,
+ BTREE_INSERT_ATOMIC|
+ BTREE_INSERT_NOFAIL);
+err:
+ if (ret == -EINTR)
+ goto retry;
+
+ bch2_trans_exit(&trans);
+
+ if (!ret) {
+ *attr = inode_to_stat(c, &inode_u);
+ fuse_reply_attr(req, attr, DBL_MAX);
+ } else {
+ fuse_reply_err(req, -ret);
+ }
+}
+
+static void bcachefs_fuse_readlink(fuse_req_t req, fuse_ino_t inum)
+{
+ //struct bch_fs *c = fuse_req_userdata(req);
+
+ //char *link = malloc();
+
+ //fuse_reply_readlink(req, link);
+}
+
+static int do_create(struct bch_fs *c, u64 dir,
+ const char *name, mode_t mode, dev_t rdev,
+ struct bch_inode_unpacked *new_inode)
+{
+ struct qstr qstr = QSTR(name);
+ struct bch_inode_unpacked dir_u;
+
+ dir = map_root_ino(dir);
+
+ bch2_inode_init_early(c, new_inode);
+
+ return bch2_trans_do(c, NULL, 0,
+ bch2_create_trans(&trans,
+ dir, &dir_u,
+ new_inode, &qstr,
+ 0, 0, mode, rdev, NULL, NULL));
+}
+
+static void bcachefs_fuse_mknod(fuse_req_t req, fuse_ino_t dir,
+ const char *name, mode_t mode,
+ dev_t rdev)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+ struct bch_inode_unpacked new_inode;
+ int ret;
+
+ ret = do_create(c, dir, name, mode, rdev, &new_inode);
+ if (ret)
+ goto err;
+
+ struct fuse_entry_param e = inode_to_entry(c, &new_inode);
+ fuse_reply_entry(req, &e);
+ return;
+err:
+ fuse_reply_err(req, -ret);
+}
+
+static void bcachefs_fuse_mkdir(fuse_req_t req, fuse_ino_t dir,
+ const char *name, mode_t mode)
+{
+ bcachefs_fuse_mknod(req, dir, name, mode, 0);
+}
+
+static void bcachefs_fuse_unlink(fuse_req_t req, fuse_ino_t dir,
+ const char *name)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+ struct bch_inode_unpacked dir_u, inode_u;
+ struct qstr qstr = QSTR(name);
+ int ret;
+
+ dir = map_root_ino(dir);
+
+ ret = bch2_trans_do(c, NULL, BTREE_INSERT_ATOMIC|BTREE_INSERT_NOFAIL,
+ bch2_unlink_trans(&trans, dir, &dir_u,
+ &inode_u, &qstr));
+
+ fuse_reply_err(req, -ret);
+}
+
+static void bcachefs_fuse_rmdir(fuse_req_t req, fuse_ino_t dir,
+ const char *name)
+{
+ dir = map_root_ino(dir);
+
+ bcachefs_fuse_unlink(req, dir, name);
+}
+
+#if 0
+static void bcachefs_fuse_symlink(fuse_req_t req, const char *link,
+ fuse_ino_t parent, const char *name)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+}
+#endif
+
+static void bcachefs_fuse_rename(fuse_req_t req,
+ fuse_ino_t src_dir, const char *srcname,
+ fuse_ino_t dst_dir, const char *dstname,
+ unsigned flags)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+ struct bch_inode_unpacked dst_dir_u, src_dir_u;
+ struct bch_inode_unpacked src_inode_u, dst_inode_u;
+ struct qstr dst_name = QSTR(srcname);
+ struct qstr src_name = QSTR(dstname);
+ int ret;
+
+ src_dir = map_root_ino(src_dir);
+ dst_dir = map_root_ino(dst_dir);
+
+ /* XXX handle overwrites */
+ ret = bch2_trans_do(c, NULL, BTREE_INSERT_ATOMIC,
+ bch2_rename_trans(&trans,
+ src_dir, &src_dir_u,
+ dst_dir, &dst_dir_u,
+ &src_inode_u, &dst_inode_u,
+ &src_name, &dst_name,
+ BCH_RENAME));
+
+ fuse_reply_err(req, -ret);
+}
+
+static void bcachefs_fuse_link(fuse_req_t req, fuse_ino_t inum,
+ fuse_ino_t newparent, const char *newname)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+ struct bch_inode_unpacked inode_u;
+ struct qstr qstr = QSTR(newname);
+ int ret;
+
+ ret = bch2_trans_do(c, NULL, BTREE_INSERT_ATOMIC,
+ bch2_link_trans(&trans, newparent,
+ inum, &inode_u, &qstr));
+
+ if (!ret) {
+ struct fuse_entry_param e = inode_to_entry(c, &inode_u);
+ fuse_reply_entry(req, &e);
+ } else {
+ fuse_reply_err(req, -ret);
+ }
+}
+
+#if 0
+static void bcachefs_fuse_open(fuse_req_t req, fuse_ino_t inum,
+ struct fuse_file_info *fi)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+}
+
+static void bcachefs_fuse_read(fuse_req_t req, fuse_ino_t inum,
+ size_t size, off_t off,
+ struct fuse_file_info *fi)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+}
+
+static void bcachefs_fuse_flush(fuse_req_t req, fuse_ino_t inum,
+ struct fuse_file_info *fi)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+}
+
+static void bcachefs_fuse_release(fuse_req_t req, fuse_ino_t inum,
+ struct fuse_file_info *fi)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+}
+
+static void bcachefs_fuse_fsync(fuse_req_t req, fuse_ino_t inum, int datasync,
+ struct fuse_file_info *fi)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+}
+
+static void bcachefs_fuse_opendir(fuse_req_t req, fuse_ino_t inum,
+ struct fuse_file_info *fi)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+}
+#endif
+
+struct fuse_dir_context {
+ struct dir_context ctx;
+ fuse_req_t req;
+ char *buf;
+ size_t bufsize;
+};
+
+static int fuse_filldir(struct dir_context *_ctx,
+ const char *name, int namelen,
+ loff_t pos, u64 dir, unsigned type)
+{
+ struct fuse_dir_context *ctx =
+ container_of(_ctx, struct fuse_dir_context, ctx);
+
+ struct stat statbuf = {
+ .st_ino = map_root_ino(dir),
+ .st_mode = type << 12,
+ };
+
+ size_t len = fuse_add_direntry(ctx->req,
+ ctx->buf,
+ ctx->bufsize,
+ name,
+ &statbuf,
+ pos + 1);
+
+ if (len > ctx->bufsize)
+ return 0;
+
+ ctx->buf += len;
+ ctx->bufsize -= len;
+ return 1;
+}
+
+static void bcachefs_fuse_readdir(fuse_req_t req, fuse_ino_t dir,
+ size_t size, off_t off,
+ struct fuse_file_info *fi)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+ char buf[4096];
+ struct fuse_dir_context ctx = {
+ .ctx.actor = fuse_filldir,
+ .ctx.pos = off,
+ .req = req,
+ .buf = buf,
+ .bufsize = sizeof(buf),
+ };
+ int ret;
+
+ dir = map_root_ino(dir);
+
+ ret = bch2_readdir(c, dir, &ctx.ctx);
+ if (!ret) {
+ fuse_reply_buf(req, buf, ctx.buf - buf);
+ } else {
+ fuse_reply_err(req, -ret);
+ }
+}
+
+#if 0
+static void bcachefs_fuse_releasedir(fuse_req_t req, fuse_ino_t inum,
+ struct fuse_file_info *fi)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+}
+
+static void bcachefs_fuse_fsyncdir(fuse_req_t req, fuse_ino_t inum, int datasync,
+ struct fuse_file_info *fi)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+}
+#endif
+
+static void bcachefs_fuse_statfs(fuse_req_t req, fuse_ino_t inum)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+ struct bch_fs_usage_short usage = bch2_fs_usage_read_short(c);
+ unsigned shift = c->block_bits;
+ struct statvfs statbuf = {
+ .f_bsize = block_bytes(c),
+ .f_frsize = block_bytes(c),
+ .f_blocks = usage.capacity >> shift,
+ .f_bfree = (usage.capacity - usage.used) >> shift,
+ //.f_bavail = statbuf.f_bfree,
+ .f_files = usage.nr_inodes,
+ .f_ffree = U64_MAX,
+ .f_namemax = BCH_NAME_MAX,
+ };
+
+ fuse_reply_statfs(req, &statbuf);
+}
+
+#if 0
+static void bcachefs_fuse_setxattr(fuse_req_t req, fuse_ino_t inum,
+ const char *name, const char *value,
+ size_t size, int flags)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+}
+
+static void bcachefs_fuse_getxattr(fuse_req_t req, fuse_ino_t inum,
+ const char *name, size_t size)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+
+ fuse_reply_xattr(req, );
+}
+
+static void bcachefs_fuse_listxattr(fuse_req_t req, fuse_ino_t inum, size_t size)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+}
+
+static void bcachefs_fuse_removexattr(fuse_req_t req, fuse_ino_t inum,
+ const char *name)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+}
+#endif
+
+static void bcachefs_fuse_create(fuse_req_t req, fuse_ino_t dir,
+ const char *name, mode_t mode,
+ struct fuse_file_info *fi)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+ struct bch_inode_unpacked new_inode;
+ int ret;
+
+ ret = do_create(c, dir, name, mode, 0, &new_inode);
+ if (ret)
+ goto err;
+
+ struct fuse_entry_param e = inode_to_entry(c, &new_inode);
+ fuse_reply_create(req, &e, fi);
+ return;
+err:
+ fuse_reply_err(req, -ret);
+
+}
+
+#if 0
+static void bcachefs_fuse_write_buf(fuse_req_t req, fuse_ino_t inum,
+ struct fuse_bufvec *bufv, off_t off,
+ struct fuse_file_info *fi)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+}
+
+static void bcachefs_fuse_fallocate(fuse_req_t req, fuse_ino_t inum, int mode,
+ off_t offset, off_t length,
+ struct fuse_file_info *fi)
+{
+ struct bch_fs *c = fuse_req_userdata(req);
+}
+#endif
+
+static const struct fuse_lowlevel_ops bcachefs_fuse_ops = {
+ .destroy = bcachefs_fuse_destroy,
+ .lookup = bcachefs_fuse_lookup,
+ .getattr = bcachefs_fuse_getattr,
+ .setattr = bcachefs_fuse_setattr,
+ .readlink = bcachefs_fuse_readlink,
+ .mknod = bcachefs_fuse_mknod,
+ .mkdir = bcachefs_fuse_mkdir,
+ .unlink = bcachefs_fuse_unlink,
+ .rmdir = bcachefs_fuse_rmdir,
+ //.symlink = bcachefs_fuse_symlink,
+ .rename = bcachefs_fuse_rename,
+ .link = bcachefs_fuse_link,
+ //.open = bcachefs_fuse_open,
+ //.read = bcachefs_fuse_read,
+ //.write = bcachefs_fuse_write,
+ //.flush = bcachefs_fuse_flush,
+ //.release = bcachefs_fuse_release,
+ //.fsync = bcachefs_fuse_fsync,
+ //.opendir = bcachefs_fuse_opendir,
+ .readdir = bcachefs_fuse_readdir,
+ //.releasedir = bcachefs_fuse_releasedir,
+ //.fsyncdir = bcachefs_fuse_fsyncdir,
+ .statfs = bcachefs_fuse_statfs,
+ //.setxattr = bcachefs_fuse_setxattr,
+ //.getxattr = bcachefs_fuse_getxattr,
+ //.listxattr = bcachefs_fuse_listxattr,
+ //.removexattr = bcachefs_fuse_removexattr,
+ .create = bcachefs_fuse_create,
+
+ /* posix locks: */
+#if 0
+ .getlk = bcachefs_fuse_getlk,
+ .setlk = bcachefs_fuse_setlk,
+#endif
+ //.write_buf = bcachefs_fuse_write_buf,
+ //.fallocate = bcachefs_fuse_fallocate,
+
+};
+
+int cmd_fusemount(int argc, char *argv[])
+{
+ struct bch_opts bch_opts = bch2_opts_empty();
+ struct bch_fs *c = NULL;
+
+ c = bch2_fs_open(argv + optind, argc - optind, bch_opts);
+ if (IS_ERR(c))
+ die("error opening %s: %s", argv[optind],
+ strerror(-PTR_ERR(c)));
+
+ struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
+ struct fuse_cmdline_opts fuse_opts;
+ if (fuse_parse_cmdline(&args, &fuse_opts) < 0)
+ die("fuse_parse_cmdline err: %m");
+
+ struct fuse_session *se =
+ fuse_session_new(&args, &bcachefs_fuse_ops,
+ sizeof(bcachefs_fuse_ops), c);
+ if (!se)
+ die("fuse_lowlevel_new err: %m");
+
+ if (fuse_set_signal_handlers(se) < 0)
+ die("fuse_set_signal_handlers err: %m");
+
+ if (fuse_session_mount(se, "/home/kent/mnt"))
+ die("fuse_mount err: %m");
+
+ int ret = fuse_session_loop(se);
+
+ fuse_session_unmount(se);
+ fuse_remove_signal_handlers(se);
+ fuse_session_destroy(se);
+ fuse_opt_free_args(&args);
+
+ return ret ? 1 : 0;
+}
projects / bcachefs-tools-debian / commitdiff