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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>
This commit is contained in:
Al Viro 2019-09-06 22:12:08 -04:00
parent 0f89589a8c
commit 2710c957a8
9 changed files with 121 additions and 167 deletions
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21
fs/afs/super.c
View File

@ -73,26 +73,25 @@ enum afs_param {
Opt_source,
};
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_string("source", 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_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_spec afs_param_specs[] = {
fsparam_flag ("autocell", Opt_autocell),
fsparam_flag ("dyn", Opt_dyn),
fsparam_enum ("flock", Opt_flock, afs_param_flock),
fsparam_string("source", Opt_source),
{}
};
static const struct fs_parameter_description afs_fs_parameters = {
.name = "kAFS",
.specs = afs_param_specs,
.enums = afs_param_enums,
};
/*

11
fs/ceph/super.c
View File

@ -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 },
{}
};
@ -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),
@ -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),
@ -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 {

72
fs/fs_parser.c
View File

@ -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;
}
@ -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);
@ -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 */
@ -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
fs/gfs2/ops_fstype.c
View File

@ -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,
@ -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),
@ -1300,11 +1319,11 @@ 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),
@ -1312,25 +1331,14 @@ static const struct fs_parameter_spec gfs2_param_specs[] = {
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 */

23
fs/jffs2/super.c
View File

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

62
fs/nfs/fs_context.c
View File

@ -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),
@ -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),
@ -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 {

38
include/linux/fs_parser.h
View File

@ -53,18 +53,17 @@ struct fs_parameter_spec {
#define fs_param_neg_with_no 0x0002 /* "noxxx" is negative param */
#define fs_param_neg_with_empty 0x0004 /* "xxx=" is negative param */
#define fs_param_deprecated 0x0008 /* The param is deprecated */
const void *data;
};
struct fs_parameter_enum {
u8 opt; /* Option number (as fs_parameter_spec::opt) */
char name[14];
const char *name;
u8 value;
};
struct fs_parameter_description {
const char name[16]; /* Name for logging purposes */
const struct fs_parameter_spec *specs; /* List of param specifications */
const struct fs_parameter_enum *enums; /* Enum values */
};
/*
@ -114,33 +113,34 @@ static inline bool fs_validate_description(const struct fs_parameter_description
* work, but any such case is probably a sign that new helper is needed.
* Helpers will remain stable; low-level implementation may change.
*/
#define __fsparam(TYPE, NAME, OPT, FLAGS) \
#define __fsparam(TYPE, NAME, OPT, FLAGS, DATA) \
{ \
.name = NAME, \
.opt = OPT, \
.type = TYPE, \
.flags = FLAGS \
.flags = FLAGS, \
.data = DATA \
}
#define fsparam_flag(NAME, OPT) __fsparam(fs_param_is_flag, NAME, OPT, 0)
#define fsparam_flag(NAME, OPT) __fsparam(fs_param_is_flag, NAME, OPT, 0, NULL)
#define fsparam_flag_no(NAME, OPT) \
__fsparam(fs_param_is_flag, NAME, OPT, \
fs_param_neg_with_no)
#define fsparam_bool(NAME, OPT) __fsparam(fs_param_is_bool, NAME, OPT, 0)
#define fsparam_u32(NAME, OPT) __fsparam(fs_param_is_u32, NAME, OPT, 0)
fs_param_neg_with_no, NULL)
#define fsparam_bool(NAME, OPT) __fsparam(fs_param_is_bool, NAME, OPT, 0, NULL)
#define fsparam_u32(NAME, OPT) __fsparam(fs_param_is_u32, NAME, OPT, 0, NULL)
#define fsparam_u32oct(NAME, OPT) \
__fsparam(fs_param_is_u32_octal, NAME, OPT, 0)
__fsparam(fs_param_is_u32_octal, NAME, OPT, 0, NULL)
#define fsparam_u32hex(NAME, OPT) \
__fsparam(fs_param_is_u32_hex, NAME, OPT, 0)
#define fsparam_s32(NAME, OPT) __fsparam(fs_param_is_s32, NAME, OPT, 0)
#define fsparam_u64(NAME, OPT) __fsparam(fs_param_is_u64, NAME, OPT, 0)
#define fsparam_enum(NAME, OPT) __fsparam(fs_param_is_enum, NAME, OPT, 0)
__fsparam(fs_param_is_u32_hex, NAME, OPT, 0, NULL)
#define fsparam_s32(NAME, OPT) __fsparam(fs_param_is_s32, NAME, OPT, 0, NULL)
#define fsparam_u64(NAME, OPT) __fsparam(fs_param_is_u64, NAME, OPT, 0, NULL)
#define fsparam_enum(NAME, OPT, array) __fsparam(fs_param_is_enum, NAME, OPT, 0, array)
#define fsparam_string(NAME, OPT) \
__fsparam(fs_param_is_string, NAME, OPT, 0)
#define fsparam_blob(NAME, OPT) __fsparam(fs_param_is_blob, NAME, OPT, 0)
#define fsparam_bdev(NAME, OPT) __fsparam(fs_param_is_blockdev, NAME, OPT, 0)
#define fsparam_path(NAME, OPT) __fsparam(fs_param_is_path, NAME, OPT, 0)
#define fsparam_fd(NAME, OPT) __fsparam(fs_param_is_fd, NAME, OPT, 0)
__fsparam(fs_param_is_string, NAME, OPT, 0, NULL)
#define fsparam_blob(NAME, OPT) __fsparam(fs_param_is_blob, NAME, OPT, 0, NULL)
#define fsparam_bdev(NAME, OPT) __fsparam(fs_param_is_blockdev, NAME, OPT, 0, NULL)
#define fsparam_path(NAME, OPT) __fsparam(fs_param_is_path, NAME, OPT, 0, NULL)
#define fsparam_fd(NAME, OPT) __fsparam(fs_param_is_fd, NAME, OPT, 0, NULL)
#endif /* _LINUX_FS_PARSER_H */

21
mm/shmem.c
View File

@ -3381,9 +3381,19 @@ enum shmem_param {
Opt_uid,
};
static const struct fs_parameter_enum shmem_param_enums_huge[] = {
{"never", SHMEM_HUGE_NEVER },
{"always", SHMEM_HUGE_ALWAYS },
{"within_size", SHMEM_HUGE_WITHIN_SIZE },
{"advise", SHMEM_HUGE_ADVISE },
{"deny", SHMEM_HUGE_DENY },
{"force", SHMEM_HUGE_FORCE },
{}
};
static const struct fs_parameter_spec shmem_param_specs[] = {
fsparam_u32 ("gid", Opt_gid),
fsparam_enum ("huge", Opt_huge),
fsparam_enum ("huge", Opt_huge, shmem_param_enums_huge),
fsparam_u32oct("mode", Opt_mode),
fsparam_string("mpol", Opt_mpol),
fsparam_string("nr_blocks", Opt_nr_blocks),
@ -3393,18 +3403,9 @@ static const struct fs_parameter_spec shmem_param_specs[] = {
{}
};
static const struct fs_parameter_enum shmem_param_enums[] = {
{ Opt_huge, "never", SHMEM_HUGE_NEVER },
{ Opt_huge, "always", SHMEM_HUGE_ALWAYS },
{ Opt_huge, "within_size", SHMEM_HUGE_WITHIN_SIZE },
{ Opt_huge, "advise", SHMEM_HUGE_ADVISE },
{}
};
const struct fs_parameter_description shmem_fs_parameters = {
.name = "tmpfs",
.specs = shmem_param_specs,
.enums = shmem_param_enums,
};
static int shmem_parse_one(struct fs_context *fc, struct fs_parameter *param)

2
net/ceph/ceph_common.c
View File

@ -283,7 +283,7 @@ static const struct fs_parameter_spec ceph_param_specs[] = {
fsparam_u32 ("osd_request_timeout", Opt_osd_request_timeout),
fsparam_u32 ("osdkeepalive", Opt_osdkeepalivetimeout),
__fsparam (fs_param_is_s32, "osdtimeout", Opt_osdtimeout,
fs_param_deprecated),
fs_param_deprecated, NULL),
fsparam_string ("secret", Opt_secret),
fsparam_flag_no ("share", Opt_share),
fsparam_flag_no ("tcp_nodelay", Opt_tcp_nodelay),