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628 lines
12 KiB
C
628 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/kernel.h>
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#include "bcachefs.h"
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#include "compress.h"
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#include "disk_groups.h"
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#include "error.h"
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#include "opts.h"
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#include "recovery_passes.h"
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#include "super-io.h"
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#include "util.h"
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#define x(t, n, ...) [n] = #t,
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const char * const bch2_error_actions[] = {
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BCH_ERROR_ACTIONS()
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NULL
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};
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const char * const bch2_fsck_fix_opts[] = {
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BCH_FIX_ERRORS_OPTS()
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NULL
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};
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const char * const bch2_version_upgrade_opts[] = {
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BCH_VERSION_UPGRADE_OPTS()
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NULL
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};
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const char * const bch2_sb_features[] = {
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BCH_SB_FEATURES()
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NULL
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};
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const char * const bch2_sb_compat[] = {
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BCH_SB_COMPAT()
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NULL
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};
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const char * const __bch2_btree_ids[] = {
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BCH_BTREE_IDS()
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NULL
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};
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static const char * const __bch2_csum_types[] = {
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BCH_CSUM_TYPES()
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NULL
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};
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const char * const bch2_csum_opts[] = {
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BCH_CSUM_OPTS()
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NULL
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};
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static const char * const __bch2_compression_types[] = {
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BCH_COMPRESSION_TYPES()
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NULL
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};
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const char * const bch2_compression_opts[] = {
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BCH_COMPRESSION_OPTS()
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NULL
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};
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const char * const bch2_str_hash_types[] = {
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BCH_STR_HASH_TYPES()
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NULL
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};
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const char * const bch2_str_hash_opts[] = {
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BCH_STR_HASH_OPTS()
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NULL
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};
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const char * const __bch2_data_types[] = {
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BCH_DATA_TYPES()
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NULL
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};
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const char * const bch2_member_states[] = {
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BCH_MEMBER_STATES()
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NULL
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};
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static const char * const __bch2_jset_entry_types[] = {
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BCH_JSET_ENTRY_TYPES()
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NULL
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};
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static const char * const __bch2_fs_usage_types[] = {
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BCH_FS_USAGE_TYPES()
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NULL
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};
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#undef x
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static void prt_str_opt_boundscheck(struct printbuf *out, const char * const opts[],
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unsigned nr, const char *type, unsigned idx)
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{
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if (idx < nr)
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prt_str(out, opts[idx]);
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else
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prt_printf(out, "(unknown %s %u)", type, idx);
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}
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#define PRT_STR_OPT_BOUNDSCHECKED(name, type) \
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void bch2_prt_##name(struct printbuf *out, type t) \
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{ \
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prt_str_opt_boundscheck(out, __bch2_##name##s, ARRAY_SIZE(__bch2_##name##s) - 1, #name, t);\
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}
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PRT_STR_OPT_BOUNDSCHECKED(jset_entry_type, enum bch_jset_entry_type);
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PRT_STR_OPT_BOUNDSCHECKED(fs_usage_type, enum bch_fs_usage_type);
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PRT_STR_OPT_BOUNDSCHECKED(data_type, enum bch_data_type);
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PRT_STR_OPT_BOUNDSCHECKED(csum_type, enum bch_csum_type);
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PRT_STR_OPT_BOUNDSCHECKED(compression_type, enum bch_compression_type);
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static int bch2_opt_fix_errors_parse(struct bch_fs *c, const char *val, u64 *res,
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struct printbuf *err)
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{
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if (!val) {
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*res = FSCK_FIX_yes;
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} else {
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int ret = match_string(bch2_fsck_fix_opts, -1, val);
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if (ret < 0 && err)
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prt_str(err, "fix_errors: invalid selection");
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if (ret < 0)
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return ret;
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*res = ret;
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}
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return 0;
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}
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static void bch2_opt_fix_errors_to_text(struct printbuf *out,
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struct bch_fs *c,
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struct bch_sb *sb,
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u64 v)
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{
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prt_str(out, bch2_fsck_fix_opts[v]);
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}
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#define bch2_opt_fix_errors (struct bch_opt_fn) { \
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.parse = bch2_opt_fix_errors_parse, \
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.to_text = bch2_opt_fix_errors_to_text, \
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}
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const char * const bch2_d_types[BCH_DT_MAX] = {
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[DT_UNKNOWN] = "unknown",
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[DT_FIFO] = "fifo",
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[DT_CHR] = "chr",
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[DT_DIR] = "dir",
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[DT_BLK] = "blk",
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[DT_REG] = "reg",
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[DT_LNK] = "lnk",
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[DT_SOCK] = "sock",
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[DT_WHT] = "whiteout",
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[DT_SUBVOL] = "subvol",
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};
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u64 BCH2_NO_SB_OPT(const struct bch_sb *sb)
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{
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BUG();
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}
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void SET_BCH2_NO_SB_OPT(struct bch_sb *sb, u64 v)
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{
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BUG();
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}
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void bch2_opts_apply(struct bch_opts *dst, struct bch_opts src)
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{
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#define x(_name, ...) \
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if (opt_defined(src, _name)) \
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opt_set(*dst, _name, src._name);
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BCH_OPTS()
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#undef x
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}
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bool bch2_opt_defined_by_id(const struct bch_opts *opts, enum bch_opt_id id)
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{
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switch (id) {
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#define x(_name, ...) \
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case Opt_##_name: \
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return opt_defined(*opts, _name);
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BCH_OPTS()
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#undef x
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default:
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BUG();
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}
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}
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u64 bch2_opt_get_by_id(const struct bch_opts *opts, enum bch_opt_id id)
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{
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switch (id) {
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#define x(_name, ...) \
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case Opt_##_name: \
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return opts->_name;
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BCH_OPTS()
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#undef x
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default:
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BUG();
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}
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}
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void bch2_opt_set_by_id(struct bch_opts *opts, enum bch_opt_id id, u64 v)
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{
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switch (id) {
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#define x(_name, ...) \
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case Opt_##_name: \
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opt_set(*opts, _name, v); \
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break;
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BCH_OPTS()
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#undef x
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default:
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BUG();
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}
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}
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const struct bch_option bch2_opt_table[] = {
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#define OPT_BOOL() .type = BCH_OPT_BOOL, .min = 0, .max = 2
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#define OPT_UINT(_min, _max) .type = BCH_OPT_UINT, \
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.min = _min, .max = _max
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#define OPT_STR(_choices) .type = BCH_OPT_STR, \
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.min = 0, .max = ARRAY_SIZE(_choices), \
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.choices = _choices
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#define OPT_STR_NOLIMIT(_choices) .type = BCH_OPT_STR, \
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.min = 0, .max = U64_MAX, \
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.choices = _choices
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#define OPT_FN(_fn) .type = BCH_OPT_FN, .fn = _fn
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#define x(_name, _bits, _flags, _type, _sb_opt, _default, _hint, _help) \
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[Opt_##_name] = { \
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.attr = { \
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.name = #_name, \
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.mode = (_flags) & OPT_RUNTIME ? 0644 : 0444, \
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}, \
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.flags = _flags, \
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.hint = _hint, \
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.help = _help, \
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.get_sb = _sb_opt, \
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.set_sb = SET_##_sb_opt, \
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_type \
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},
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BCH_OPTS()
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#undef x
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};
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int bch2_opt_lookup(const char *name)
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{
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const struct bch_option *i;
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for (i = bch2_opt_table;
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i < bch2_opt_table + ARRAY_SIZE(bch2_opt_table);
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i++)
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if (!strcmp(name, i->attr.name))
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return i - bch2_opt_table;
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return -1;
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}
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struct synonym {
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const char *s1, *s2;
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};
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static const struct synonym bch_opt_synonyms[] = {
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{ "quota", "usrquota" },
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};
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static int bch2_mount_opt_lookup(const char *name)
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{
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const struct synonym *i;
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for (i = bch_opt_synonyms;
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i < bch_opt_synonyms + ARRAY_SIZE(bch_opt_synonyms);
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i++)
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if (!strcmp(name, i->s1))
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name = i->s2;
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return bch2_opt_lookup(name);
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}
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int bch2_opt_validate(const struct bch_option *opt, u64 v, struct printbuf *err)
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{
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if (v < opt->min) {
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if (err)
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prt_printf(err, "%s: too small (min %llu)",
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opt->attr.name, opt->min);
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return -BCH_ERR_ERANGE_option_too_small;
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}
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if (opt->max && v >= opt->max) {
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if (err)
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prt_printf(err, "%s: too big (max %llu)",
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opt->attr.name, opt->max);
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return -BCH_ERR_ERANGE_option_too_big;
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}
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if ((opt->flags & OPT_SB_FIELD_SECTORS) && (v & 511)) {
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if (err)
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prt_printf(err, "%s: not a multiple of 512",
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opt->attr.name);
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return -BCH_ERR_opt_parse_error;
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}
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if ((opt->flags & OPT_MUST_BE_POW_2) && !is_power_of_2(v)) {
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if (err)
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prt_printf(err, "%s: must be a power of two",
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opt->attr.name);
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return -BCH_ERR_opt_parse_error;
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}
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if (opt->fn.validate)
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return opt->fn.validate(v, err);
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return 0;
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}
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int bch2_opt_parse(struct bch_fs *c,
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const struct bch_option *opt,
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const char *val, u64 *res,
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struct printbuf *err)
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{
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ssize_t ret;
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switch (opt->type) {
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case BCH_OPT_BOOL:
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if (val) {
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ret = kstrtou64(val, 10, res);
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} else {
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ret = 0;
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*res = 1;
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}
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if (ret < 0 || (*res != 0 && *res != 1)) {
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if (err)
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prt_printf(err, "%s: must be bool", opt->attr.name);
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return ret < 0 ? ret : -BCH_ERR_option_not_bool;
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}
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break;
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case BCH_OPT_UINT:
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if (!val) {
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prt_printf(err, "%s: required value",
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opt->attr.name);
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return -EINVAL;
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}
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ret = opt->flags & OPT_HUMAN_READABLE
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? bch2_strtou64_h(val, res)
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: kstrtou64(val, 10, res);
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if (ret < 0) {
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if (err)
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prt_printf(err, "%s: must be a number",
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opt->attr.name);
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return ret;
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}
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break;
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case BCH_OPT_STR:
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if (!val) {
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prt_printf(err, "%s: required value",
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opt->attr.name);
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return -EINVAL;
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}
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ret = match_string(opt->choices, -1, val);
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if (ret < 0) {
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if (err)
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prt_printf(err, "%s: invalid selection",
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opt->attr.name);
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return ret;
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}
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*res = ret;
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break;
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case BCH_OPT_FN:
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ret = opt->fn.parse(c, val, res, err);
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if (ret < 0) {
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if (err)
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prt_printf(err, "%s: parse error",
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opt->attr.name);
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return ret;
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}
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}
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return bch2_opt_validate(opt, *res, err);
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}
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void bch2_opt_to_text(struct printbuf *out,
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struct bch_fs *c, struct bch_sb *sb,
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const struct bch_option *opt, u64 v,
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unsigned flags)
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{
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if (flags & OPT_SHOW_MOUNT_STYLE) {
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if (opt->type == BCH_OPT_BOOL) {
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prt_printf(out, "%s%s",
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v ? "" : "no",
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opt->attr.name);
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return;
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}
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prt_printf(out, "%s=", opt->attr.name);
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}
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switch (opt->type) {
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case BCH_OPT_BOOL:
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case BCH_OPT_UINT:
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if (opt->flags & OPT_HUMAN_READABLE)
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prt_human_readable_u64(out, v);
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else
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prt_printf(out, "%lli", v);
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break;
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case BCH_OPT_STR:
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if (flags & OPT_SHOW_FULL_LIST)
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prt_string_option(out, opt->choices, v);
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else
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prt_str(out, opt->choices[v]);
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break;
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case BCH_OPT_FN:
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opt->fn.to_text(out, c, sb, v);
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break;
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default:
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BUG();
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}
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}
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int bch2_opt_check_may_set(struct bch_fs *c, int id, u64 v)
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{
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int ret = 0;
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switch (id) {
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case Opt_compression:
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case Opt_background_compression:
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ret = bch2_check_set_has_compressed_data(c, v);
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break;
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case Opt_erasure_code:
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if (v)
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bch2_check_set_feature(c, BCH_FEATURE_ec);
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break;
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}
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return ret;
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}
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int bch2_opts_check_may_set(struct bch_fs *c)
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{
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unsigned i;
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int ret;
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for (i = 0; i < bch2_opts_nr; i++) {
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ret = bch2_opt_check_may_set(c, i,
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bch2_opt_get_by_id(&c->opts, i));
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if (ret)
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return ret;
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}
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return 0;
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}
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int bch2_parse_mount_opts(struct bch_fs *c, struct bch_opts *opts,
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char *options)
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{
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char *copied_opts, *copied_opts_start;
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char *opt, *name, *val;
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int ret, id;
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struct printbuf err = PRINTBUF;
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u64 v;
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if (!options)
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return 0;
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/*
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* sys_fsconfig() is now occasionally providing us with option lists
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* starting with a comma - weird.
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*/
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if (*options == ',')
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options++;
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copied_opts = kstrdup(options, GFP_KERNEL);
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if (!copied_opts)
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return -ENOMEM;
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copied_opts_start = copied_opts;
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while ((opt = strsep(&copied_opts, ",")) != NULL) {
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name = strsep(&opt, "=");
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val = opt;
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id = bch2_mount_opt_lookup(name);
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/* Check for the form "noopt", negation of a boolean opt: */
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if (id < 0 &&
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!val &&
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!strncmp("no", name, 2)) {
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id = bch2_mount_opt_lookup(name + 2);
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val = "0";
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}
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/* Unknown options are ignored: */
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if (id < 0)
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continue;
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if (!(bch2_opt_table[id].flags & OPT_MOUNT))
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goto bad_opt;
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if (id == Opt_acl &&
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!IS_ENABLED(CONFIG_BCACHEFS_POSIX_ACL))
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goto bad_opt;
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if ((id == Opt_usrquota ||
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id == Opt_grpquota) &&
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!IS_ENABLED(CONFIG_BCACHEFS_QUOTA))
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goto bad_opt;
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ret = bch2_opt_parse(c, &bch2_opt_table[id], val, &v, &err);
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if (ret < 0)
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goto bad_val;
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bch2_opt_set_by_id(opts, id, v);
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}
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ret = 0;
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goto out;
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bad_opt:
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pr_err("Bad mount option %s", name);
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ret = -BCH_ERR_option_name;
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goto out;
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bad_val:
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pr_err("Invalid mount option %s", err.buf);
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ret = -BCH_ERR_option_value;
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goto out;
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out:
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kfree(copied_opts_start);
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printbuf_exit(&err);
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return ret;
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}
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u64 bch2_opt_from_sb(struct bch_sb *sb, enum bch_opt_id id)
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{
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const struct bch_option *opt = bch2_opt_table + id;
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|
u64 v;
|
|
|
|
v = opt->get_sb(sb);
|
|
|
|
if (opt->flags & OPT_SB_FIELD_ILOG2)
|
|
v = 1ULL << v;
|
|
|
|
if (opt->flags & OPT_SB_FIELD_SECTORS)
|
|
v <<= 9;
|
|
|
|
return v;
|
|
}
|
|
|
|
/*
|
|
* Initial options from superblock - here we don't want any options undefined,
|
|
* any options the superblock doesn't specify are set to 0:
|
|
*/
|
|
int bch2_opts_from_sb(struct bch_opts *opts, struct bch_sb *sb)
|
|
{
|
|
unsigned id;
|
|
|
|
for (id = 0; id < bch2_opts_nr; id++) {
|
|
const struct bch_option *opt = bch2_opt_table + id;
|
|
|
|
if (opt->get_sb == BCH2_NO_SB_OPT)
|
|
continue;
|
|
|
|
bch2_opt_set_by_id(opts, id, bch2_opt_from_sb(sb, id));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void __bch2_opt_set_sb(struct bch_sb *sb, const struct bch_option *opt, u64 v)
|
|
{
|
|
if (opt->set_sb == SET_BCH2_NO_SB_OPT)
|
|
return;
|
|
|
|
if (opt->flags & OPT_SB_FIELD_SECTORS)
|
|
v >>= 9;
|
|
|
|
if (opt->flags & OPT_SB_FIELD_ILOG2)
|
|
v = ilog2(v);
|
|
|
|
opt->set_sb(sb, v);
|
|
}
|
|
|
|
void bch2_opt_set_sb(struct bch_fs *c, const struct bch_option *opt, u64 v)
|
|
{
|
|
if (opt->set_sb == SET_BCH2_NO_SB_OPT)
|
|
return;
|
|
|
|
mutex_lock(&c->sb_lock);
|
|
__bch2_opt_set_sb(c->disk_sb.sb, opt, v);
|
|
bch2_write_super(c);
|
|
mutex_unlock(&c->sb_lock);
|
|
}
|
|
|
|
/* io opts: */
|
|
|
|
struct bch_io_opts bch2_opts_to_inode_opts(struct bch_opts src)
|
|
{
|
|
return (struct bch_io_opts) {
|
|
#define x(_name, _bits) ._name = src._name,
|
|
BCH_INODE_OPTS()
|
|
#undef x
|
|
};
|
|
}
|
|
|
|
bool bch2_opt_is_inode_opt(enum bch_opt_id id)
|
|
{
|
|
static const enum bch_opt_id inode_opt_list[] = {
|
|
#define x(_name, _bits) Opt_##_name,
|
|
BCH_INODE_OPTS()
|
|
#undef x
|
|
};
|
|
unsigned i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(inode_opt_list); i++)
|
|
if (inode_opt_list[i] == id)
|
|
return true;
|
|
|
|
return false;
|
|
}
|