+++ /dev/null
-// 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 "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
-};
-
-const char * const bch2_csum_types[] = {
- BCH_CSUM_TYPES()
- NULL
-};
-
-const char * const bch2_csum_opts[] = {
- BCH_CSUM_OPTS()
- NULL
-};
-
-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
-};
-
-const char * const bch2_jset_entry_types[] = {
- BCH_JSET_ENTRY_TYPES()
- NULL
-};
-
-const char * const bch2_fs_usage_types[] = {
- BCH_FS_USAGE_TYPES()
- NULL
-};
-
-#undef x
-
-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_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;
- }
- 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 -1;
- 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 = -1;
- goto out;
-bad_val:
- pr_err("Invalid mount option %s", err.buf);
- ret = -1;
- 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;
-}
projects / bcachefs-tools-debian / blobdiff