[linux-block.git] / fs / bcachefs / opts.c

// SPDX-License-Identifier: GPL-2.0

#include <linux/kernel.h>

#include "bcachefs.h"
#include "compress.h"
#include "disk_groups.h"
#include "error.h"
#include "opts.h"
#include "recovery_passes.h"
#include "super-io.h"
#include "util.h"

#define x(t, n, ...) [n] = #t,

const char * const bch2_error_actions[] = {
	BCH_ERROR_ACTIONS()
	NULL
};

const char * const bch2_fsck_fix_opts[] = {
	BCH_FIX_ERRORS_OPTS()
	NULL
};

const char * const bch2_version_upgrade_opts[] = {
	BCH_VERSION_UPGRADE_OPTS()
	NULL
};

const char * const bch2_sb_features[] = {
	BCH_SB_FEATURES()
	NULL
};

const char * const bch2_sb_compat[] = {
	BCH_SB_COMPAT()
	NULL
};

const char * const __bch2_btree_ids[] = {
	BCH_BTREE_IDS()
	NULL
};

static const char * const __bch2_csum_types[] = {
	BCH_CSUM_TYPES()
	NULL
};

const char * const bch2_csum_opts[] = {
	BCH_CSUM_OPTS()
	NULL
};

static const char * const __bch2_compression_types[] = {
	BCH_COMPRESSION_TYPES()
	NULL
};

const char * const bch2_compression_opts[] = {
	BCH_COMPRESSION_OPTS()
	NULL
};

const char * const bch2_str_hash_types[] = {
	BCH_STR_HASH_TYPES()
	NULL
};

const char * const bch2_str_hash_opts[] = {
	BCH_STR_HASH_OPTS()
	NULL
};

const char * const __bch2_data_types[] = {
	BCH_DATA_TYPES()
	NULL
};

const char * const bch2_member_states[] = {
	BCH_MEMBER_STATES()
	NULL
};

static const char * const __bch2_jset_entry_types[] = {
	BCH_JSET_ENTRY_TYPES()
	NULL
};

static const char * const __bch2_fs_usage_types[] = {
	BCH_FS_USAGE_TYPES()
	NULL
};

#undef x

static void prt_str_opt_boundscheck(struct printbuf *out, const char * const opts[],
				    unsigned nr, const char *type, unsigned idx)
{
	if (idx < nr)
		prt_str(out, opts[idx]);
	else
		prt_printf(out, "(unknown %s %u)", type, idx);
}

#define PRT_STR_OPT_BOUNDSCHECKED(name, type)					\
void bch2_prt_##name(struct printbuf *out, type t)				\
{										\
	prt_str_opt_boundscheck(out, __bch2_##name##s, ARRAY_SIZE(__bch2_##name##s) - 1, #name, t);\
}

PRT_STR_OPT_BOUNDSCHECKED(jset_entry_type,	enum bch_jset_entry_type);
PRT_STR_OPT_BOUNDSCHECKED(fs_usage_type,	enum bch_fs_usage_type);
PRT_STR_OPT_BOUNDSCHECKED(data_type,		enum bch_data_type);
PRT_STR_OPT_BOUNDSCHECKED(csum_type,		enum bch_csum_type);
PRT_STR_OPT_BOUNDSCHECKED(compression_type,	enum bch_compression_type);

static int bch2_opt_fix_errors_parse(struct bch_fs *c, const char *val, u64 *res,
				     struct printbuf *err)
{
	if (!val) {
		*res = FSCK_FIX_yes;
	} else {
		int ret = match_string(bch2_fsck_fix_opts, -1, val);

		if (ret < 0 && err)
			prt_str(err, "fix_errors: invalid selection");
		if (ret < 0)
			return ret;
		*res = ret;
	}

	return 0;
}

static void bch2_opt_fix_errors_to_text(struct printbuf *out,
					struct bch_fs *c,
					struct bch_sb *sb,
					u64 v)
{
	prt_str(out, bch2_fsck_fix_opts[v]);
}

#define bch2_opt_fix_errors (struct bch_opt_fn) {	\
	.parse = bch2_opt_fix_errors_parse,		\
	.to_text = bch2_opt_fix_errors_to_text,		\
}

const char * const bch2_d_types[BCH_DT_MAX] = {
	[DT_UNKNOWN]	= "unknown",
	[DT_FIFO]	= "fifo",
	[DT_CHR]	= "chr",
	[DT_DIR]	= "dir",
	[DT_BLK]	= "blk",
	[DT_REG]	= "reg",
	[DT_LNK]	= "lnk",
	[DT_SOCK]	= "sock",
	[DT_WHT]	= "whiteout",
	[DT_SUBVOL]	= "subvol",
};

u64 BCH2_NO_SB_OPT(const struct bch_sb *sb)
{
	BUG();
}

void SET_BCH2_NO_SB_OPT(struct bch_sb *sb, u64 v)
{
	BUG();
}

void bch2_opts_apply(struct bch_opts *dst, struct bch_opts src)
{
#define x(_name, ...)						\
	if (opt_defined(src, _name))					\
		opt_set(*dst, _name, src._name);

	BCH_OPTS()
#undef x
}

bool bch2_opt_defined_by_id(const struct bch_opts *opts, enum bch_opt_id id)
{
	switch (id) {
#define x(_name, ...)						\
	case Opt_##_name:						\
		return opt_defined(*opts, _name);
	BCH_OPTS()
#undef x
	default:
		BUG();
	}
}

u64 bch2_opt_get_by_id(const struct bch_opts *opts, enum bch_opt_id id)
{
	switch (id) {
#define x(_name, ...)						\
	case Opt_##_name:						\
		return opts->_name;
	BCH_OPTS()
#undef x
	default:
		BUG();
	}
}

void bch2_opt_set_by_id(struct bch_opts *opts, enum bch_opt_id id, u64 v)
{
	switch (id) {
#define x(_name, ...)						\
	case Opt_##_name:						\
		opt_set(*opts, _name, v);				\
		break;
	BCH_OPTS()
#undef x
	default:
		BUG();
	}
}

const struct bch_option bch2_opt_table[] = {
#define OPT_BOOL()		.type = BCH_OPT_BOOL, .min = 0, .max = 2
#define OPT_UINT(_min, _max)	.type = BCH_OPT_UINT,			\
				.min = _min, .max = _max
#define OPT_STR(_choices)	.type = BCH_OPT_STR,			\
				.min = 0, .max = ARRAY_SIZE(_choices),	\
				.choices = _choices
#define OPT_STR_NOLIMIT(_choices)	.type = BCH_OPT_STR,		\
				.min = 0, .max = U64_MAX,		\
				.choices = _choices
#define OPT_FN(_fn)		.type = BCH_OPT_FN, .fn	= _fn

#define x(_name, _bits, _flags, _type, _sb_opt, _default, _hint, _help)	\
	[Opt_##_name] = {						\
		.attr	= {						\
			.name	= #_name,				\
			.mode = (_flags) & OPT_RUNTIME ? 0644 : 0444,	\
		},							\
		.flags	= _flags,					\
		.hint	= _hint,					\
		.help	= _help,					\
		.get_sb = _sb_opt,					\
		.set_sb	= SET_##_sb_opt,				\
		_type							\
	},

	BCH_OPTS()
#undef x
};

int bch2_opt_lookup(const char *name)
{
	const struct bch_option *i;

	for (i = bch2_opt_table;
	     i < bch2_opt_table + ARRAY_SIZE(bch2_opt_table);
	     i++)
		if (!strcmp(name, i->attr.name))
			return i - bch2_opt_table;

	return -1;
}

struct synonym {
	const char	*s1, *s2;
};

static const struct synonym bch_opt_synonyms[] = {
	{ "quota",	"usrquota" },
};

static int bch2_mount_opt_lookup(const char *name)
{
	const struct synonym *i;

	for (i = bch_opt_synonyms;
	     i < bch_opt_synonyms + ARRAY_SIZE(bch_opt_synonyms);
	     i++)
		if (!strcmp(name, i->s1))
			name = i->s2;

	return bch2_opt_lookup(name);
}

int bch2_opt_validate(const struct bch_option *opt, u64 v, struct printbuf *err)
{
	if (v < opt->min) {
		if (err)
			prt_printf(err, "%s: too small (min %llu)",
			       opt->attr.name, opt->min);
		return -BCH_ERR_ERANGE_option_too_small;
	}

	if (opt->max && v >= opt->max) {
		if (err)
			prt_printf(err, "%s: too big (max %llu)",
			       opt->attr.name, opt->max);
		return -BCH_ERR_ERANGE_option_too_big;
	}

	if ((opt->flags & OPT_SB_FIELD_SECTORS) && (v & 511)) {
		if (err)
			prt_printf(err, "%s: not a multiple of 512",
			       opt->attr.name);
		return -BCH_ERR_opt_parse_error;
	}

	if ((opt->flags & OPT_MUST_BE_POW_2) && !is_power_of_2(v)) {
		if (err)
			prt_printf(err, "%s: must be a power of two",
			       opt->attr.name);
		return -BCH_ERR_opt_parse_error;
	}

	if (opt->fn.validate)
		return opt->fn.validate(v, err);

	return 0;
}

int bch2_opt_parse(struct bch_fs *c,
		   const struct bch_option *opt,
		   const char *val, u64 *res,
		   struct printbuf *err)
{
	ssize_t ret;

	switch (opt->type) {
	case BCH_OPT_BOOL:
		if (val) {
			ret = kstrtou64(val, 10, res);
		} else {
			ret = 0;
			*res = 1;
		}

		if (ret < 0 || (*res != 0 && *res != 1)) {
			if (err)
				prt_printf(err, "%s: must be bool", opt->attr.name);
			return ret < 0 ? ret : -BCH_ERR_option_not_bool;
		}
		break;
	case BCH_OPT_UINT:
		if (!val) {
			prt_printf(err, "%s: required value",
				   opt->attr.name);
			return -EINVAL;
		}

		ret = opt->flags & OPT_HUMAN_READABLE
			? bch2_strtou64_h(val, res)
			: kstrtou64(val, 10, res);
		if (ret < 0) {
			if (err)
				prt_printf(err, "%s: must be a number",
					   opt->attr.name);
			return ret;
		}
		break;
	case BCH_OPT_STR:
		if (!val) {
			prt_printf(err, "%s: required value",
				   opt->attr.name);
			return -EINVAL;
		}

		ret = match_string(opt->choices, -1, val);
		if (ret < 0) {
			if (err)
				prt_printf(err, "%s: invalid selection",
					   opt->attr.name);
			return ret;
		}

		*res = ret;
		break;
	case BCH_OPT_FN:
		ret = opt->fn.parse(c, val, res, err);
		if (ret < 0) {
			if (err)
				prt_printf(err, "%s: parse error",
					   opt->attr.name);
			return ret;
		}
	}

	return bch2_opt_validate(opt, *res, err);
}

void bch2_opt_to_text(struct printbuf *out,
		      struct bch_fs *c, struct bch_sb *sb,
		      const struct bch_option *opt, u64 v,
		      unsigned flags)
{
	if (flags & OPT_SHOW_MOUNT_STYLE) {
		if (opt->type == BCH_OPT_BOOL) {
			prt_printf(out, "%s%s",
			       v ? "" : "no",
			       opt->attr.name);
			return;
		}

		prt_printf(out, "%s=", opt->attr.name);
	}

	switch (opt->type) {
	case BCH_OPT_BOOL:
	case BCH_OPT_UINT:
		if (opt->flags & OPT_HUMAN_READABLE)
			prt_human_readable_u64(out, v);
		else
			prt_printf(out, "%lli", v);
		break;
	case BCH_OPT_STR:
		if (flags & OPT_SHOW_FULL_LIST)
			prt_string_option(out, opt->choices, v);
		else
			prt_str(out, opt->choices[v]);
		break;
	case BCH_OPT_FN:
		opt->fn.to_text(out, c, sb, v);
		break;
	default:
		BUG();
	}
}

int bch2_opt_check_may_set(struct bch_fs *c, int id, u64 v)
{
	int ret = 0;

	switch (id) {
	case Opt_compression:
	case Opt_background_compression:
		ret = bch2_check_set_has_compressed_data(c, v);
		break;
	case Opt_erasure_code:
		if (v)
			bch2_check_set_feature(c, BCH_FEATURE_ec);
		break;
	}

	return ret;
}

int bch2_opts_check_may_set(struct bch_fs *c)
{
	unsigned i;
	int ret;

	for (i = 0; i < bch2_opts_nr; i++) {
		ret = bch2_opt_check_may_set(c, i,
				bch2_opt_get_by_id(&c->opts, i));
		if (ret)
			return ret;
	}

	return 0;
}

int bch2_parse_mount_opts(struct bch_fs *c, struct bch_opts *opts,
			  char *options)
{
	char *copied_opts, *copied_opts_start;
	char *opt, *name, *val;
	int ret, id;
	struct printbuf err = PRINTBUF;
	u64 v;

	if (!options)
		return 0;

	/*
	 * sys_fsconfig() is now occasionally providing us with option lists
	 * starting with a comma - weird.
	 */
	if (*options == ',')
		options++;

	copied_opts = kstrdup(options, GFP_KERNEL);
	if (!copied_opts)
		return -ENOMEM;
	copied_opts_start = copied_opts;

	while ((opt = strsep(&copied_opts, ",")) != NULL) {
		name	= strsep(&opt, "=");
		val	= opt;

		id = bch2_mount_opt_lookup(name);

		/* Check for the form "noopt", negation of a boolean opt: */
		if (id < 0 &&
		    !val &&
		    !strncmp("no", name, 2)) {
			id = bch2_mount_opt_lookup(name + 2);
			val = "0";
		}

		/* Unknown options are ignored: */
		if (id < 0)
			continue;

		if (!(bch2_opt_table[id].flags & OPT_MOUNT))
			goto bad_opt;

		if (id == Opt_acl &&
		    !IS_ENABLED(CONFIG_BCACHEFS_POSIX_ACL))
			goto bad_opt;

		if ((id == Opt_usrquota ||
		     id == Opt_grpquota) &&
		    !IS_ENABLED(CONFIG_BCACHEFS_QUOTA))
			goto bad_opt;

		ret = bch2_opt_parse(c, &bch2_opt_table[id], val, &v, &err);
		if (ret < 0)
			goto bad_val;

		bch2_opt_set_by_id(opts, id, v);
	}

	ret = 0;
	goto out;

bad_opt:
	pr_err("Bad mount option %s", name);
	ret = -BCH_ERR_option_name;
	goto out;
bad_val:
	pr_err("Invalid mount option %s", err.buf);
	ret = -BCH_ERR_option_value;
	goto out;
out:
	kfree(copied_opts_start);
	printbuf_exit(&err);
	return ret;
}

u64 bch2_opt_from_sb(struct bch_sb *sb, enum bch_opt_id id)
{
	const struct bch_option *opt = bch2_opt_table + id;
	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;
}
Commit	Line	Data
1c6fdbd8 KO	1	// SPDX-License-Identifier: GPL-2.0
	2
	3	#include <linux/kernel.h>
	4
	5	#include "bcachefs.h"
c258f28e	6	#include "compress.h"
1c6fdbd8	7	#include "disk_groups.h"
a0f8faea	8	#include "error.h"
1c6fdbd8	9	#include "opts.h"
13c1e583	10	#include "recovery_passes.h"
1c6fdbd8 KO	11	#include "super-io.h"
	12	#include "util.h"
	13
e8d2fe3b	14	#define x(t, n, ...) [n] = #t,
74b33393	15
1c6fdbd8	16	const char * const bch2_error_actions[] = {
2436cb9f	17	BCH_ERROR_ACTIONS()
1c6fdbd8 KO	18	NULL
	19	};
	20
a0f8faea KO	21	const char * const bch2_fsck_fix_opts[] = {
	22	BCH_FIX_ERRORS_OPTS()
	23	NULL
	24	};
	25
3045bb95 KO	26	const char * const bch2_version_upgrade_opts[] = {
	27	BCH_VERSION_UPGRADE_OPTS()
	28	NULL
	29	};
	30
1c3ff72c	31	const char * const bch2_sb_features[] = {
1c3ff72c	32	BCH_SB_FEATURES()
1c3ff72c KO	33	NULL
	34	};
	35
19dd3172	36	const char * const bch2_sb_compat[] = {
19dd3172	37	BCH_SB_COMPAT()
19dd3172 KO	38	NULL
	39	};
	40
88dfe193	41	const char * const __bch2_btree_ids[] = {
41f8b09e	42	BCH_BTREE_IDS()
41f8b09e KO	43	NULL
	44	};
	45
9abb6dd7	46	static const char * const __bch2_csum_types[] = {
6404dcc9 KO	47	BCH_CSUM_TYPES()
	48	NULL
	49	};
	50
1c3ff72c	51	const char * const bch2_csum_opts[] = {
2436cb9f	52	BCH_CSUM_OPTS()
1c6fdbd8 KO	53	NULL
	54	};
	55
9abb6dd7	56	static const char * const __bch2_compression_types[] = {
6404dcc9 KO	57	BCH_COMPRESSION_TYPES()
	58	NULL
	59	};
	60
1c3ff72c	61	const char * const bch2_compression_opts[] = {
1c3ff72c	62	BCH_COMPRESSION_OPTS()
1c6fdbd8 KO	63	NULL
	64	};
	65
	66	const char * const bch2_str_hash_types[] = {
6404dcc9 KO	67	BCH_STR_HASH_TYPES()
	68	NULL
	69	};
	70
	71	const char * const bch2_str_hash_opts[] = {
2436cb9f	72	BCH_STR_HASH_OPTS()
1c6fdbd8 KO	73	NULL
	74	};
	75
e58f963c	76	const char * const __bch2_data_types[] = {
89fd25be	77	BCH_DATA_TYPES()
1c6fdbd8 KO	78	NULL
	79	};
	80
2436cb9f KO	81	const char * const bch2_member_states[] = {
2436cb9f KO	82	BCH_MEMBER_STATES()
1c6fdbd8 KO	83	NULL
	84	};
	85
9abb6dd7	86	static const char * const __bch2_jset_entry_types[] = {
528b18e6 KO	87	BCH_JSET_ENTRY_TYPES()
	88	NULL
	89	};
	90
9abb6dd7	91	static const char * const __bch2_fs_usage_types[] = {
528b18e6 KO	92	BCH_FS_USAGE_TYPES()
	93	NULL
	94	};
	95
2436cb9f	96	#undef x
1c6fdbd8	97
9abb6dd7 KO	98	static void prt_str_opt_boundscheck(struct printbuf out, const char const opts[],
	99	unsigned nr, const char *type, unsigned idx)
	100	{
	101	if (idx < nr)
	102	prt_str(out, opts[idx]);
	103	else
	104	prt_printf(out, "(unknown %s %u)", type, idx);
	105	}
	106
	107	#define PRT_STR_OPT_BOUNDSCHECKED(name, type) \
	108	void bch2_prt_##name(struct printbuf *out, type t) \
	109	{ \
	110	prt_str_opt_boundscheck(out, __bch2_##name##s, ARRAY_SIZE(__bch2_##name##s) - 1, #name, t);\
	111	}
	112
	113	PRT_STR_OPT_BOUNDSCHECKED(jset_entry_type, enum bch_jset_entry_type);
	114	PRT_STR_OPT_BOUNDSCHECKED(fs_usage_type, enum bch_fs_usage_type);
	115	PRT_STR_OPT_BOUNDSCHECKED(data_type, enum bch_data_type);
	116	PRT_STR_OPT_BOUNDSCHECKED(csum_type, enum bch_csum_type);
	117	PRT_STR_OPT_BOUNDSCHECKED(compression_type, enum bch_compression_type);
	118
a0f8faea KO	119	static int bch2_opt_fix_errors_parse(struct bch_fs c, const char val, u64 *res,
	120	struct printbuf *err)
	121	{
	122	if (!val) {
	123	*res = FSCK_FIX_yes;
	124	} else {
	125	int ret = match_string(bch2_fsck_fix_opts, -1, val);
	126
	127	if (ret < 0 && err)
	128	prt_str(err, "fix_errors: invalid selection");
	129	if (ret < 0)
	130	return ret;
	131	*res = ret;
	132	}
	133
	134	return 0;
	135	}
	136
	137	static void bch2_opt_fix_errors_to_text(struct printbuf *out,
	138	struct bch_fs *c,
	139	struct bch_sb *sb,
	140	u64 v)
	141	{
	142	prt_str(out, bch2_fsck_fix_opts[v]);
	143	}
	144
bf5a261c KO	145	#define bch2_opt_fix_errors (struct bch_opt_fn) { \
	146	.parse = bch2_opt_fix_errors_parse, \
	147	.to_text = bch2_opt_fix_errors_to_text, \
	148	}
a0f8faea	149
14b393ee	150	const char * const bch2_d_types[BCH_DT_MAX] = {
d5bee8ca KO	151	[DT_UNKNOWN] = "unknown",
	152	[DT_FIFO] = "fifo",
	153	[DT_CHR] = "chr",
	154	[DT_DIR] = "dir",
	155	[DT_BLK] = "blk",
	156	[DT_REG] = "reg",
	157	[DT_LNK] = "lnk",
	158	[DT_SOCK] = "sock",
	159	[DT_WHT] = "whiteout",
14b393ee	160	[DT_SUBVOL] = "subvol",
d5bee8ca KO	161	};
d5bee8ca KO	162
5521b1df KO	163	u64 BCH2_NO_SB_OPT(const struct bch_sb *sb)
	164	{
	165	BUG();
	166	}
	167
	168	void SET_BCH2_NO_SB_OPT(struct bch_sb *sb, u64 v)
	169	{
	170	BUG();
	171	}
	172
1c6fdbd8 KO	173	void bch2_opts_apply(struct bch_opts *dst, struct bch_opts src)
1c6fdbd8 KO	174	{
0b847a19	175	#define x(_name, ...) \
1c6fdbd8 KO	176	if (opt_defined(src, _name)) \
	177	opt_set(*dst, _name, src._name);
	178
	179	BCH_OPTS()
0b847a19	180	#undef x
1c6fdbd8 KO	181	}
	182
	183	bool bch2_opt_defined_by_id(const struct bch_opts *opts, enum bch_opt_id id)
	184	{
	185	switch (id) {
0b847a19	186	#define x(_name, ...) \
1c6fdbd8 KO	187	case Opt_##_name: \
	188	return opt_defined(*opts, _name);
	189	BCH_OPTS()
0b847a19	190	#undef x
1c6fdbd8 KO	191	default:
	192	BUG();
	193	}
	194	}
	195
	196	u64 bch2_opt_get_by_id(const struct bch_opts *opts, enum bch_opt_id id)
	197	{
	198	switch (id) {
0b847a19	199	#define x(_name, ...) \
1c6fdbd8 KO	200	case Opt_##_name: \
	201	return opts->_name;
	202	BCH_OPTS()
0b847a19	203	#undef x
1c6fdbd8 KO	204	default:
	205	BUG();
	206	}
	207	}
	208
	209	void bch2_opt_set_by_id(struct bch_opts *opts, enum bch_opt_id id, u64 v)
	210	{
	211	switch (id) {
0b847a19	212	#define x(_name, ...) \
1c6fdbd8 KO	213	case Opt_##_name: \
	214	opt_set(*opts, _name, v); \
	215	break;
	216	BCH_OPTS()
0b847a19	217	#undef x
1c6fdbd8 KO	218	default:
	219	BUG();
	220	}
	221	}
	222
1c6fdbd8	223	const struct bch_option bch2_opt_table[] = {
8244f320 KO	224	#define OPT_BOOL() .type = BCH_OPT_BOOL, .min = 0, .max = 2
	225	#define OPT_UINT(_min, _max) .type = BCH_OPT_UINT, \
	226	.min = _min, .max = _max
	227	#define OPT_STR(_choices) .type = BCH_OPT_STR, \
9f343e24	228	.min = 0, .max = ARRAY_SIZE(_choices), \
8244f320	229	.choices = _choices
13c1e583 KO	230	#define OPT_STR_NOLIMIT(_choices) .type = BCH_OPT_STR, \
	231	.min = 0, .max = U64_MAX, \
	232	.choices = _choices
9f343e24	233	#define OPT_FN(_fn) .type = BCH_OPT_FN, .fn = _fn
1c6fdbd8	234
8244f320	235	#define x(_name, _bits, _flags, _type, _sb_opt, _default, _hint, _help) \
1c6fdbd8 KO	236	[Opt_##_name] = { \
	237	.attr = { \
	238	.name = #_name, \
8244f320	239	.mode = (_flags) & OPT_RUNTIME ? 0644 : 0444, \
1c6fdbd8	240	}, \
8244f320	241	.flags = _flags, \
0b847a19 KO	242	.hint = _hint, \
0b847a19 KO	243	.help = _help, \
8244f320	244	.get_sb = _sb_opt, \
1c6fdbd8 KO	245	.set_sb = SET_##_sb_opt, \
	246	_type \
	247	},
	248
	249	BCH_OPTS()
0b847a19	250	#undef x
1c6fdbd8 KO	251	};
	252
	253	int bch2_opt_lookup(const char *name)
	254	{
	255	const struct bch_option *i;
	256
	257	for (i = bch2_opt_table;
	258	i < bch2_opt_table + ARRAY_SIZE(bch2_opt_table);
	259	i++)
	260	if (!strcmp(name, i->attr.name))
	261	return i - bch2_opt_table;
	262
	263	return -1;
	264	}
	265
	266	struct synonym {
	267	const char s1, s2;
	268	};
	269
	270	static const struct synonym bch_opt_synonyms[] = {
	271	{ "quota", "usrquota" },
	272	};
	273
	274	static int bch2_mount_opt_lookup(const char *name)
	275	{
	276	const struct synonym *i;
	277
	278	for (i = bch_opt_synonyms;
	279	i < bch_opt_synonyms + ARRAY_SIZE(bch_opt_synonyms);
	280	i++)
	281	if (!strcmp(name, i->s1))
	282	name = i->s2;
	283
	284	return bch2_opt_lookup(name);
	285	}
	286
63c4b254	287	int bch2_opt_validate(const struct bch_option opt, u64 v, struct printbuf err)
8244f320 KO	288	{
8244f320 KO	289	if (v < opt->min) {
63c4b254	290	if (err)
401ec4db	291	prt_printf(err, "%s: too small (min %llu)",
63c4b254	292	opt->attr.name, opt->min);
a973de85	293	return -BCH_ERR_ERANGE_option_too_small;
8244f320 KO	294	}
	295
	296	if (opt->max && v >= opt->max) {
63c4b254	297	if (err)
401ec4db	298	prt_printf(err, "%s: too big (max %llu)",
63c4b254	299	opt->attr.name, opt->max);
a973de85	300	return -BCH_ERR_ERANGE_option_too_big;
8244f320 KO	301	}
	302
	303	if ((opt->flags & OPT_SB_FIELD_SECTORS) && (v & 511)) {
63c4b254	304	if (err)
401ec4db	305	prt_printf(err, "%s: not a multiple of 512",
63c4b254	306	opt->attr.name);
56ec287d	307	return -BCH_ERR_opt_parse_error;
8244f320 KO	308	}
	309
	310	if ((opt->flags & OPT_MUST_BE_POW_2) && !is_power_of_2(v)) {
63c4b254	311	if (err)
401ec4db	312	prt_printf(err, "%s: must be a power of two",
63c4b254	313	opt->attr.name);
56ec287d	314	return -BCH_ERR_opt_parse_error;
8244f320 KO	315	}
8244f320 KO	316
6ddedca2 KO	317	if (opt->fn.validate)
	318	return opt->fn.validate(v, err);
	319
8244f320 KO	320	return 0;
	321	}
	322
63c4b254	323	int bch2_opt_parse(struct bch_fs *c,
8244f320	324	const struct bch_option *opt,
63c4b254 KO	325	const char val, u64 res,
63c4b254 KO	326	struct printbuf *err)
1c6fdbd8 KO	327	{
	328	ssize_t ret;
	329
	330	switch (opt->type) {
	331	case BCH_OPT_BOOL:
a0f8faea KO	332	if (val) {
	333	ret = kstrtou64(val, 10, res);
	334	} else {
	335	ret = 0;
	336	*res = 1;
	337	}
	338
4a7a7ea1 KO	339	if (ret < 0 \|\| (res != 0 && res != 1)) {
4a7a7ea1 KO	340	if (err)
a0f8faea	341	prt_printf(err, "%s: must be bool", opt->attr.name);
2a68d611	342	return ret < 0 ? ret : -BCH_ERR_option_not_bool;
4a7a7ea1	343	}
1c6fdbd8 KO	344	break;
1c6fdbd8 KO	345	case BCH_OPT_UINT:
a0f8faea KO	346	if (!val) {
	347	prt_printf(err, "%s: required value",
	348	opt->attr.name);
	349	return -EINVAL;
	350	}
	351
8244f320 KO	352	ret = opt->flags & OPT_HUMAN_READABLE
	353	? bch2_strtou64_h(val, res)
	354	: kstrtou64(val, 10, res);
4a7a7ea1 KO	355	if (ret < 0) {
4a7a7ea1 KO	356	if (err)
401ec4db KO	357	prt_printf(err, "%s: must be a number",
401ec4db KO	358	opt->attr.name);
1c6fdbd8	359	return ret;
4a7a7ea1	360	}
1c6fdbd8 KO	361	break;
1c6fdbd8 KO	362	case BCH_OPT_STR:
a0f8faea KO	363	if (!val) {
	364	prt_printf(err, "%s: required value",
	365	opt->attr.name);
	366	return -EINVAL;
	367	}
	368
1c6fdbd8	369	ret = match_string(opt->choices, -1, val);
4a7a7ea1 KO	370	if (ret < 0) {
4a7a7ea1 KO	371	if (err)
401ec4db KO	372	prt_printf(err, "%s: invalid selection",
401ec4db KO	373	opt->attr.name);
1c6fdbd8	374	return ret;
4a7a7ea1	375	}
1c6fdbd8 KO	376
	377	*res = ret;
	378	break;
	379	case BCH_OPT_FN:
9f343e24	380	ret = opt->fn.parse(c, val, res, err);
4a7a7ea1 KO	381	if (ret < 0) {
4a7a7ea1 KO	382	if (err)
401ec4db KO	383	prt_printf(err, "%s: parse error",
401ec4db KO	384	opt->attr.name);
8244f320	385	return ret;
4a7a7ea1	386	}
1c6fdbd8 KO	387	}
1c6fdbd8 KO	388
63c4b254	389	return bch2_opt_validate(opt, *res, err);
1c6fdbd8 KO	390	}
1c6fdbd8 KO	391
5521b1df KO	392	void bch2_opt_to_text(struct printbuf *out,
5521b1df KO	393	struct bch_fs c, struct bch_sb sb,
319f9ac3 KO	394	const struct bch_option *opt, u64 v,
319f9ac3 KO	395	unsigned flags)
1c6fdbd8	396	{
1c6fdbd8	397	if (flags & OPT_SHOW_MOUNT_STYLE) {
319f9ac3	398	if (opt->type == BCH_OPT_BOOL) {
401ec4db	399	prt_printf(out, "%s%s",
319f9ac3 KO	400	v ? "" : "no",
	401	opt->attr.name);
	402	return;
	403	}
	404
401ec4db	405	prt_printf(out, "%s=", opt->attr.name);
1c6fdbd8 KO	406	}
	407
	408	switch (opt->type) {
	409	case BCH_OPT_BOOL:
	410	case BCH_OPT_UINT:
8244f320	411	if (opt->flags & OPT_HUMAN_READABLE)
401ec4db	412	prt_human_readable_u64(out, v);
8244f320	413	else
401ec4db	414	prt_printf(out, "%lli", v);
0b847a19	415	break;
1c6fdbd8	416	case BCH_OPT_STR:
319f9ac3	417	if (flags & OPT_SHOW_FULL_LIST)
401ec4db	418	prt_string_option(out, opt->choices, v);
319f9ac3	419	else
a0f8faea	420	prt_str(out, opt->choices[v]);
1c6fdbd8 KO	421	break;
1c6fdbd8 KO	422	case BCH_OPT_FN:
9f343e24	423	opt->fn.to_text(out, c, sb, v);
319f9ac3	424	break;
1c6fdbd8 KO	425	default:
	426	BUG();
	427	}
1c6fdbd8 KO	428	}
1c6fdbd8 KO	429
c258f28e KO	430	int bch2_opt_check_may_set(struct bch_fs *c, int id, u64 v)
	431	{
	432	int ret = 0;
	433
	434	switch (id) {
	435	case Opt_compression:
	436	case Opt_background_compression:
	437	ret = bch2_check_set_has_compressed_data(c, v);
	438	break;
cd575ddf	439	case Opt_erasure_code:
ba239c95	440	if (v)
1c3ff72c	441	bch2_check_set_feature(c, BCH_FEATURE_ec);
cd575ddf	442	break;
c258f28e KO	443	}
	444
	445	return ret;
	446	}
	447
cd575ddf KO	448	int bch2_opts_check_may_set(struct bch_fs *c)
	449	{
	450	unsigned i;
	451	int ret;
	452
	453	for (i = 0; i < bch2_opts_nr; i++) {
	454	ret = bch2_opt_check_may_set(c, i,
	455	bch2_opt_get_by_id(&c->opts, i));
	456	if (ret)
	457	return ret;
	458	}
	459
	460	return 0;
	461	}
	462
a10e677a KO	463	int bch2_parse_mount_opts(struct bch_fs c, struct bch_opts opts,
a10e677a KO	464	char *options)
1c6fdbd8	465	{
baf056b8	466	char copied_opts, copied_opts_start;
1c6fdbd8 KO	467	char opt, name, *val;
1c6fdbd8 KO	468	int ret, id;
63c4b254	469	struct printbuf err = PRINTBUF;
1c6fdbd8 KO	470	u64 v;
1c6fdbd8 KO	471
baf056b8 DR	472	if (!options)
	473	return 0;
	474
cf416e7a KO	475	/*
	476	* sys_fsconfig() is now occasionally providing us with option lists
	477	* starting with a comma - weird.
	478	*/
	479	if (*options == ',')
	480	options++;
	481
baf056b8 DR	482	copied_opts = kstrdup(options, GFP_KERNEL);
baf056b8 DR	483	if (!copied_opts)
79162e82	484	return -ENOMEM;
baf056b8 DR	485	copied_opts_start = copied_opts;
	486
	487	while ((opt = strsep(&copied_opts, ",")) != NULL) {
1c6fdbd8 KO	488	name = strsep(&opt, "=");
	489	val = opt;
	490
a0f8faea	491	id = bch2_mount_opt_lookup(name);
1c6fdbd8	492
a0f8faea KO	493	/* Check for the form "noopt", negation of a boolean opt: */
	494	if (id < 0 &&
	495	!val &&
	496	!strncmp("no", name, 2)) {
	497	id = bch2_mount_opt_lookup(name + 2);
	498	val = "0";
1c6fdbd8 KO	499	}
1c6fdbd8 KO	500
03ef80b4	501	/* Unknown options are ignored: */
a0f8faea	502	if (id < 0)
03ef80b4	503	continue;
a0f8faea	504
8244f320	505	if (!(bch2_opt_table[id].flags & OPT_MOUNT))
1c6fdbd8 KO	506	goto bad_opt;
	507
	508	if (id == Opt_acl &&
	509	!IS_ENABLED(CONFIG_BCACHEFS_POSIX_ACL))
	510	goto bad_opt;
	511
	512	if ((id == Opt_usrquota \|\|
	513	id == Opt_grpquota) &&
	514	!IS_ENABLED(CONFIG_BCACHEFS_QUOTA))
	515	goto bad_opt;
	516
a0f8faea KO	517	ret = bch2_opt_parse(c, &bch2_opt_table[id], val, &v, &err);
	518	if (ret < 0)
	519	goto bad_val;
	520
1c6fdbd8 KO	521	bch2_opt_set_by_id(opts, id, v);
	522	}
	523
baf056b8 DR	524	ret = 0;
	525	goto out;
	526
1c6fdbd8 KO	527	bad_opt:
1c6fdbd8 KO	528	pr_err("Bad mount option %s", name);
79162e82	529	ret = -BCH_ERR_option_name;
baf056b8	530	goto out;
1c6fdbd8	531	bad_val:
63c4b254	532	pr_err("Invalid mount option %s", err.buf);
79162e82	533	ret = -BCH_ERR_option_value;
baf056b8	534	goto out;
baf056b8 DR	535	out:
baf056b8 DR	536	kfree(copied_opts_start);
63c4b254	537	printbuf_exit(&err);
baf056b8	538	return ret;
1c6fdbd8 KO	539	}
1c6fdbd8 KO	540
5521b1df KO	541	u64 bch2_opt_from_sb(struct bch_sb *sb, enum bch_opt_id id)
	542	{
	543	const struct bch_option *opt = bch2_opt_table + id;
	544	u64 v;
	545
	546	v = opt->get_sb(sb);
	547
	548	if (opt->flags & OPT_SB_FIELD_ILOG2)
	549	v = 1ULL << v;
	550
	551	if (opt->flags & OPT_SB_FIELD_SECTORS)
	552	v <<= 9;
	553
	554	return v;
	555	}
	556
8244f320 KO	557	/*
	558	* Initial options from superblock - here we don't want any options undefined,
	559	* any options the superblock doesn't specify are set to 0:
	560	*/
	561	int bch2_opts_from_sb(struct bch_opts opts, struct bch_sb sb)
	562	{
	563	unsigned id;
8244f320 KO	564
	565	for (id = 0; id < bch2_opts_nr; id++) {
	566	const struct bch_option *opt = bch2_opt_table + id;
8244f320	567
5521b1df	568	if (opt->get_sb == BCH2_NO_SB_OPT)
8244f320 KO	569	continue;
8244f320 KO	570
63c4b254	571	bch2_opt_set_by_id(opts, id, bch2_opt_from_sb(sb, id));
8244f320 KO	572	}
	573
	574	return 0;
	575	}
	576
	577	void __bch2_opt_set_sb(struct bch_sb sb, const struct bch_option opt, u64 v)
	578	{
5521b1df	579	if (opt->set_sb == SET_BCH2_NO_SB_OPT)
8244f320 KO	580	return;
	581
	582	if (opt->flags & OPT_SB_FIELD_SECTORS)
	583	v >>= 9;
	584
	585	if (opt->flags & OPT_SB_FIELD_ILOG2)
	586	v = ilog2(v);
	587
	588	opt->set_sb(sb, v);
	589	}
	590
	591	void bch2_opt_set_sb(struct bch_fs c, const struct bch_option opt, u64 v)
	592	{
5521b1df	593	if (opt->set_sb == SET_BCH2_NO_SB_OPT)
8244f320 KO	594	return;
	595
	596	mutex_lock(&c->sb_lock);
	597	__bch2_opt_set_sb(c->disk_sb.sb, opt, v);
	598	bch2_write_super(c);
	599	mutex_unlock(&c->sb_lock);
	600	}
	601
1c6fdbd8 KO	602	/* io opts: */
	603
	604	struct bch_io_opts bch2_opts_to_inode_opts(struct bch_opts src)
	605	{
01ad6737 KO	606	return (struct bch_io_opts) {
01ad6737 KO	607	#define x(_name, _bits) ._name = src._name,
1c6fdbd8	608	BCH_INODE_OPTS()
a3e70fb2	609	#undef x
01ad6737	610	};
1c6fdbd8 KO	611	}
	612
	613	bool bch2_opt_is_inode_opt(enum bch_opt_id id)
	614	{
	615	static const enum bch_opt_id inode_opt_list[] = {
a3e70fb2	616	#define x(_name, _bits) Opt_##_name,
1c6fdbd8	617	BCH_INODE_OPTS()
a3e70fb2	618	#undef x
1c6fdbd8 KO	619	};
	620	unsigned i;
	621
	622	for (i = 0; i < ARRAY_SIZE(inode_opt_list); i++)
	623	if (inode_opt_list[i] == id)
	624	return true;
	625
	626	return false;
	627	}