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fs_parse: get rid of ->enums
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Don't do a single array; attach them to fsparam_enum() entry
instead.  And don't bother trying to embed the names into those -
it actually loses memory, with no real speedup worth mentioning.

Simplifies validation as well.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Al Viro committed Feb 7, 2020
1 parent 0f89589 commit 2710c95
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Showing 9 changed files with 119 additions and 165 deletions.
19 changes: 9 additions & 10 deletions fs/afs/super.c
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Original file line number Diff line number Diff line change
Expand Up @@ -73,26 +73,25 @@ enum afs_param {
Opt_source,
};

static const struct fs_parameter_enum afs_param_flock[] = {
{"local", afs_flock_mode_local },
{"openafs", afs_flock_mode_openafs },
{"strict", afs_flock_mode_strict },
{"write", afs_flock_mode_write },
{}
};

static const struct fs_parameter_spec afs_param_specs[] = {
fsparam_flag ("autocell", Opt_autocell),
fsparam_flag ("dyn", Opt_dyn),
fsparam_enum ("flock", Opt_flock),
fsparam_enum ("flock", Opt_flock, afs_param_flock),
fsparam_string("source", Opt_source),
{}
};

static const struct fs_parameter_enum afs_param_enums[] = {
{ Opt_flock, "local", afs_flock_mode_local },
{ Opt_flock, "openafs", afs_flock_mode_openafs },
{ Opt_flock, "strict", afs_flock_mode_strict },
{ Opt_flock, "write", afs_flock_mode_write },
{}
};

static const struct fs_parameter_description afs_fs_parameters = {
.name = "kAFS",
.specs = afs_param_specs,
.enums = afs_param_enums,
};

/*
Expand Down
11 changes: 5 additions & 6 deletions fs/ceph/super.c
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Original file line number Diff line number Diff line change
Expand Up @@ -163,9 +163,9 @@ enum ceph_recover_session_mode {
ceph_recover_session_clean
};

static const struct fs_parameter_enum ceph_mount_param_enums[] = {
{ Opt_recover_session, "no", ceph_recover_session_no },
{ Opt_recover_session, "clean", ceph_recover_session_clean },
static const struct fs_parameter_enum ceph_param_recover[] = {
{ "no", ceph_recover_session_no },
{ "clean", ceph_recover_session_clean },
{}
};

Expand All @@ -180,7 +180,7 @@ static const struct fs_parameter_spec ceph_mount_param_specs[] = {
fsparam_flag_no ("dcache", Opt_dcache),
fsparam_flag_no ("dirstat", Opt_dirstat),
__fsparam (fs_param_is_string, "fsc", Opt_fscache,
fs_param_neg_with_no | fs_param_v_optional),
fs_param_neg_with_no | fs_param_v_optional, NULL),
fsparam_flag_no ("ino32", Opt_ino32),
fsparam_string ("mds_namespace", Opt_mds_namespace),
fsparam_flag_no ("poolperm", Opt_poolperm),
Expand All @@ -189,7 +189,7 @@ static const struct fs_parameter_spec ceph_mount_param_specs[] = {
fsparam_flag_no ("rbytes", Opt_rbytes),
fsparam_u32 ("readdir_max_bytes", Opt_readdir_max_bytes),
fsparam_u32 ("readdir_max_entries", Opt_readdir_max_entries),
fsparam_enum ("recover_session", Opt_recover_session),
fsparam_enum ("recover_session", Opt_recover_session, ceph_param_recover),
fsparam_flag_no ("require_active_mds", Opt_require_active_mds),
fsparam_u32 ("rsize", Opt_rsize),
fsparam_string ("snapdirname", Opt_snapdirname),
Expand All @@ -201,7 +201,6 @@ static const struct fs_parameter_spec ceph_mount_param_specs[] = {
static const struct fs_parameter_description ceph_mount_parameters = {
.name = "ceph",
.specs = ceph_mount_param_specs,
.enums = ceph_mount_param_enums,
};

struct ceph_parse_opts_ctx {
Expand Down
72 changes: 9 additions & 63 deletions fs/fs_parser.c
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Original file line number Diff line number Diff line change
Expand Up @@ -189,9 +189,8 @@ int fs_parse(struct fs_context *fc,
goto maybe_okay;

case fs_param_is_enum:
for (e = desc->enums; e->name[0]; e++) {
if (e->opt == p->opt &&
strcmp(e->name, param->string) == 0) {
for (e = p->data; e->name; e++) {
if (strcmp(e->name, param->string) == 0) {
result->uint_32 = e->value;
goto okay;
}
Expand Down Expand Up @@ -359,10 +358,8 @@ bool validate_constant_table(const struct constant_table *tbl, size_t tbl_size,
bool fs_validate_description(const struct fs_parameter_description *desc)
{
const struct fs_parameter_spec *param, *p2;
const struct fs_parameter_enum *e;
const char *name = desc->name;
unsigned int nr_params = 0;
bool good = true, enums = false;
bool good = true;

pr_notice("*** VALIDATE %s ***\n", name);

Expand All @@ -383,7 +380,12 @@ bool fs_validate_description(const struct fs_parameter_description *desc)
name, param->name, t);
good = false;
} else if (t == fs_param_is_enum) {
enums = true;
const struct fs_parameter_enum *e = param->data;
if (!e || !e->name) {
pr_err("VALIDATE %s: PARAM[%s] enum with no values\n",
name, param->name);
good = false;
}
}

/* Check for duplicate parameter names */
Expand All @@ -395,63 +397,7 @@ bool fs_validate_description(const struct fs_parameter_description *desc)
}
}
}

nr_params = param - desc->specs;
}

if (desc->enums) {
if (!nr_params) {
pr_err("VALIDATE %s: Enum table but no parameters\n",
name);
good = false;
goto no_enums;
}
if (!enums) {
pr_err("VALIDATE %s: Enum table but no enum-type values\n",
name);
good = false;
goto no_enums;
}

for (e = desc->enums; e->name[0]; e++) {
/* Check that all entries in the enum table have at
* least one parameter that uses them.
*/
for (param = desc->specs; param->name; param++) {
if (param->opt == e->opt &&
param->type != fs_param_is_enum) {
pr_err("VALIDATE %s: e[%tu] enum val for %s\n",
name, e - desc->enums, param->name);
good = false;
}
}
}

/* Check that all enum-type parameters have at least one enum
* value in the enum table.
*/
for (param = desc->specs; param->name; param++) {
if (param->type != fs_param_is_enum)
continue;
for (e = desc->enums; e->name[0]; e++)
if (e->opt == param->opt)
break;
if (!e->name[0]) {
pr_err("VALIDATE %s: PARAM[%s] enum with no values\n",
name, param->name);
good = false;
}
}
} else {
if (enums) {
pr_err("VALIDATE %s: enum-type values, but no enum table\n",
name);
good = false;
goto no_enums;
}
}

no_enums:
return good;
}
#endif /* CONFIG_VALIDATE_FS_PARSER */
38 changes: 23 additions & 15 deletions fs/gfs2/ops_fstype.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1271,6 +1271,13 @@ enum opt_quota {
Opt_quota_on,
};

static const struct fs_parameter_enum gfs2_param_quota[] = {
{"off", Opt_quota_off },
{"account", Opt_quota_account },
{"on", Opt_quota_on },
{}
};

static const unsigned int opt_quota_values[] = {
[Opt_quota_off] = GFS2_QUOTA_OFF,
[Opt_quota_account] = GFS2_QUOTA_ACCOUNT,
Expand All @@ -1282,11 +1289,23 @@ enum opt_data {
Opt_data_ordered = GFS2_DATA_ORDERED,
};

static const struct fs_parameter_enum gfs2_param_data[] = {
{"writeback", Opt_data_writeback },
{"ordered", Opt_data_ordered },
{}
};

enum opt_errors {
Opt_errors_withdraw = GFS2_ERRORS_WITHDRAW,
Opt_errors_panic = GFS2_ERRORS_PANIC,
};

static const struct fs_parameter_enum gfs2_param_errors[] = {
{"withdraw", Opt_errors_withdraw },
{"panic", Opt_errors_panic },
{}
};

static const struct fs_parameter_spec gfs2_param_specs[] = {
fsparam_string ("lockproto", Opt_lockproto),
fsparam_string ("locktable", Opt_locktable),
Expand All @@ -1300,37 +1319,26 @@ static const struct fs_parameter_spec gfs2_param_specs[] = {
fsparam_flag ("upgrade", Opt_upgrade),
fsparam_flag_no("acl", Opt_acl),
fsparam_flag_no("suiddir", Opt_suiddir),
fsparam_enum ("data", Opt_data),
fsparam_enum ("data", Opt_data, gfs2_param_data),
fsparam_flag ("meta", Opt_meta),
fsparam_flag_no("discard", Opt_discard),
fsparam_s32 ("commit", Opt_commit),
fsparam_enum ("errors", Opt_errors),
fsparam_enum ("errors", Opt_errors, gfs2_param_errors),
fsparam_s32 ("statfs_quantum", Opt_statfs_quantum),
fsparam_s32 ("statfs_percent", Opt_statfs_percent),
fsparam_s32 ("quota_quantum", Opt_quota_quantum),
fsparam_flag_no("barrier", Opt_barrier),
fsparam_flag_no("rgrplvb", Opt_rgrplvb),
fsparam_flag_no("loccookie", Opt_loccookie),
/* quota can be a flag or an enum so it gets special treatment */
__fsparam(fs_param_is_enum, "quota", Opt_quota, fs_param_neg_with_no|fs_param_v_optional),
{}
};

static const struct fs_parameter_enum gfs2_param_enums[] = {
{ Opt_quota, "off", Opt_quota_off },
{ Opt_quota, "account", Opt_quota_account },
{ Opt_quota, "on", Opt_quota_on },
{ Opt_data, "writeback", Opt_data_writeback },
{ Opt_data, "ordered", Opt_data_ordered },
{ Opt_errors, "withdraw", Opt_errors_withdraw },
{ Opt_errors, "panic", Opt_errors_panic },
__fsparam(fs_param_is_enum, "quota", Opt_quota,
fs_param_neg_with_no|fs_param_v_optional, gfs2_param_quota),
{}
};

static const struct fs_parameter_description gfs2_fs_parameters = {
.name = "gfs2",
.specs = gfs2_param_specs,
.enums = gfs2_param_enums,
};

/* Parse a single mount parameter */
Expand Down
21 changes: 10 additions & 11 deletions fs/jffs2/super.c
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Original file line number Diff line number Diff line change
Expand Up @@ -167,27 +167,26 @@ enum {
Opt_rp_size,
};

static const struct fs_parameter_spec jffs2_param_specs[] = {
fsparam_enum ("compr", Opt_override_compr),
fsparam_u32 ("rp_size", Opt_rp_size),
{}
};

static const struct fs_parameter_enum jffs2_param_enums[] = {
{ Opt_override_compr, "none", JFFS2_COMPR_MODE_NONE },
static const struct fs_parameter_enum jffs2_param_compr[] = {
{"none", JFFS2_COMPR_MODE_NONE },
#ifdef CONFIG_JFFS2_LZO
{ Opt_override_compr, "lzo", JFFS2_COMPR_MODE_FORCELZO },
{"lzo", JFFS2_COMPR_MODE_FORCELZO },
#endif
#ifdef CONFIG_JFFS2_ZLIB
{ Opt_override_compr, "zlib", JFFS2_COMPR_MODE_FORCEZLIB },
{"zlib", JFFS2_COMPR_MODE_FORCEZLIB },
#endif
{}
};

static const struct fs_parameter_spec jffs2_param_specs[] = {
fsparam_enum ("compr", Opt_override_compr, jffs2_param_compr),
fsparam_u32 ("rp_size", Opt_rp_size),
{}
};

const struct fs_parameter_description jffs2_fs_parameters = {
.name = "jffs2",
.specs = jffs2_param_specs,
.enums = jffs2_param_enums,
};

static int jffs2_parse_param(struct fs_context *fc, struct fs_parameter *param)
Expand Down
62 changes: 32 additions & 30 deletions fs/nfs/fs_context.c
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Original file line number Diff line number Diff line change
Expand Up @@ -83,6 +83,34 @@ enum nfs_param {
Opt_wsize,
};

enum {
Opt_local_lock_all,
Opt_local_lock_flock,
Opt_local_lock_none,
Opt_local_lock_posix,
};

static const struct fs_parameter_enum nfs_param_enums_local_lock[] = {
{ "all", Opt_local_lock_all },
{ "flock", Opt_local_lock_flock },
{ "none", Opt_local_lock_none },
{}
};

enum {
Opt_lookupcache_all,
Opt_lookupcache_none,
Opt_lookupcache_positive,
};

static const struct fs_parameter_enum nfs_param_enums_lookupcache[] = {
{ "all", Opt_lookupcache_all },
{ "none", Opt_lookupcache_none },
{ "pos", Opt_lookupcache_positive },
{ "positive", Opt_lookupcache_positive },
{}
};

static const struct fs_parameter_spec nfs_param_specs[] = {
fsparam_flag_no("ac", Opt_ac),
fsparam_u32 ("acdirmax", Opt_acdirmax),
Expand All @@ -98,13 +126,13 @@ static const struct fs_parameter_spec nfs_param_specs[] = {
fsparam_flag_no("cto", Opt_cto),
fsparam_flag ("fg", Opt_fg),
__fsparam(fs_param_is_string, "fsc", Opt_fscache,
fs_param_neg_with_no|fs_param_v_optional),
fs_param_neg_with_no|fs_param_v_optional, NULL),
fsparam_flag ("hard", Opt_hard),
__fsparam(fs_param_is_flag, "intr", Opt_intr,
fs_param_neg_with_no|fs_param_deprecated),
fsparam_enum ("local_lock", Opt_local_lock),
fs_param_neg_with_no|fs_param_deprecated, NULL),
fsparam_enum ("local_lock", Opt_local_lock, nfs_param_enums_local_lock),
fsparam_flag_no("lock", Opt_lock),
fsparam_enum ("lookupcache", Opt_lookupcache),
fsparam_enum ("lookupcache", Opt_lookupcache, nfs_param_enums_lookupcache),
fsparam_flag_no("migration", Opt_migration),
fsparam_u32 ("minorversion", Opt_minorversion),
fsparam_string("mountaddr", Opt_mountaddr),
Expand Down Expand Up @@ -145,35 +173,9 @@ static const struct fs_parameter_spec nfs_param_specs[] = {
{}
};

enum {
Opt_local_lock_all,
Opt_local_lock_flock,
Opt_local_lock_none,
Opt_local_lock_posix,
};

enum {
Opt_lookupcache_all,
Opt_lookupcache_none,
Opt_lookupcache_positive,
};

static const struct fs_parameter_enum nfs_param_enums[] = {
{ Opt_local_lock, "all", Opt_local_lock_all },
{ Opt_local_lock, "flock", Opt_local_lock_flock },
{ Opt_local_lock, "none", Opt_local_lock_none },
{ Opt_local_lock, "posix", Opt_local_lock_posix },
{ Opt_lookupcache, "all", Opt_lookupcache_all },
{ Opt_lookupcache, "none", Opt_lookupcache_none },
{ Opt_lookupcache, "pos", Opt_lookupcache_positive },
{ Opt_lookupcache, "positive", Opt_lookupcache_positive },
{}
};

static const struct fs_parameter_description nfs_fs_parameters = {
.name = "nfs",
.specs = nfs_param_specs,
.enums = nfs_param_enums,
};

enum {
Expand Down
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