From f5baaf48e3e82b1caf9f5cd1207d4d6feba3a2e5 Mon Sep 17 00:00:00 2001 From: Thomas Bertschinger Date: Mon, 15 Jan 2024 23:41:02 -0700 Subject: move Rust sources to top level, C sources into c_src This moves the Rust sources out of rust_src/ and into the top level. Running the bcachefs executable out of the development tree is now: $ ./target/release/bcachefs command or $ cargo run --profile release -- command instead of "./bcachefs command". Building and installing is still: $ make && make install Signed-off-by: Thomas Bertschinger Signed-off-by: Kent Overstreet --- c_src/cmd_kill_btree_node.c | 116 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 116 insertions(+) create mode 100644 c_src/cmd_kill_btree_node.c (limited to 'c_src/cmd_kill_btree_node.c') diff --git a/c_src/cmd_kill_btree_node.c b/c_src/cmd_kill_btree_node.c new file mode 100644 index 00000000..b0832843 --- /dev/null +++ b/c_src/cmd_kill_btree_node.c @@ -0,0 +1,116 @@ +#include +#include +#include +#include + +#include "cmds.h" +#include "libbcachefs.h" +#include "tools-util.h" + +#include "libbcachefs/bcachefs.h" +#include "libbcachefs/btree_iter.h" +#include "libbcachefs/errcode.h" +#include "libbcachefs/error.h" +#include "libbcachefs/sb-members.h" +#include "libbcachefs/super.h" + +static void kill_btree_node_usage(void) +{ + puts("bcachefs kill_btree_node - make btree nodes unreadable\n" + "Usage: bcachefs kill_btree_node [OPTION]... \n" + "\n" + "Options:\n" + " -b (extents|inodes|dirents|xattrs) Btree to delete from\n" + " -l level Levle to delete from (0 == leaves)\n" + " -i index Index of btree node to kill\n" + " -h Display this help and exit\n" + "Report bugs to "); +} + +int cmd_kill_btree_node(int argc, char *argv[]) +{ + struct bch_opts opts = bch2_opts_empty(); + enum btree_id btree_id = 0; + unsigned level = 0; + u64 node_index = 0; + int opt; + + opt_set(opts, read_only, true); + + while ((opt = getopt(argc, argv, "b:l:i:h")) != -1) + switch (opt) { + case 'b': + btree_id = read_string_list_or_die(optarg, + __bch2_btree_ids, "btree id"); + break; + case 'l': + if (kstrtouint(optarg, 10, &level) || level >= BTREE_MAX_DEPTH) + die("invalid level"); + break; + case 'i': + if (kstrtoull(optarg, 10, &node_index)) + die("invalid index %s", optarg); + break; + case 'h': + kill_btree_node_usage(); + exit(EXIT_SUCCESS); + } + args_shift(optind); + + if (!argc) + die("Please supply device(s)"); + + struct bch_fs *c = bch2_fs_open(argv, argc, opts); + if (IS_ERR(c)) + die("error opening %s: %s", argv[0], bch2_err_str(PTR_ERR(c))); + + struct btree_trans *trans = bch2_trans_get(c); + struct btree_iter iter; + struct btree *b; + int ret; + void *zeroes; + + ret = posix_memalign(&zeroes, c->opts.block_size, c->opts.block_size); + if (ret) + die("error %s from posix_memalign", bch2_err_str(ret)); + + __for_each_btree_node(trans, iter, btree_id, POS_MIN, 0, level, 0, b, ret) { + if (b->c.level != level) + continue; + + if (!node_index) { + struct printbuf buf = PRINTBUF; + bch2_bkey_val_to_text(&buf, c, bkey_i_to_s_c(&b->key)); + bch_info(c, "killing btree node %s", buf.buf); + printbuf_exit(&buf); + + struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(bkey_i_to_s_c(&b->key)); + bkey_for_each_ptr(ptrs, ptr) { + struct bch_dev *ca = bch_dev_bkey_exists(c, ptr->dev); + + ret = pwrite(ca->disk_sb.bdev->bd_fd, zeroes, + c->opts.block_size, ptr->offset << 9); + if (ret != c->opts.block_size) { + bch_err(c, "pwrite error: expected %u got %i %s", + c->opts.block_size, ret, strerror(errno)); + ret = EXIT_FAILURE; + goto done; + } + } + goto done; + } + + node_index--; + } + if (ret) + bch_err(c, "error %i walking btree nodes", ret); + else + bch_err(c, "node at specified index not found"); + ret = EXIT_FAILURE; +done: + bch2_trans_iter_exit(trans, &iter); + bch2_trans_put(trans); + + bch2_fs_stop(c); + return ret; +} -- cgit v1.2.3