From: Lukas Czerner <lczerner@redhat.com>
To: linux-ext4@vger.kernel.org
Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk
Subject: [PATCH v2 01/17] fs_parse: allow parameter value to be empty
Date: Tue, 28 Apr 2020 18:45:20 +0200 [thread overview]
Message-ID: <20200428164536.462-2-lczerner@redhat.com> (raw)
In-Reply-To: <20200428164536.462-1-lczerner@redhat.com>
Allow parameter value to be empty by spcifying fs_param_can_be_empty
flag.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
---
fs/fs_parser.c | 31 +++++++++++++++++++++++--------
include/linux/fs_parser.h | 2 +-
2 files changed, 24 insertions(+), 9 deletions(-)
diff --git a/fs/fs_parser.c b/fs/fs_parser.c
index ab53e42a874a..0d44801919f9 100644
--- a/fs/fs_parser.c
+++ b/fs/fs_parser.c
@@ -200,6 +200,8 @@ int fs_param_is_bool(struct p_log *log, const struct fs_parameter_spec *p,
int b;
if (param->type != fs_value_is_string)
return fs_param_bad_value(log, param);
+ if (!*param->string && (p->flags & fs_param_can_be_empty))
+ return 0;
b = lookup_constant(bool_names, param->string, -1);
if (b == -1)
return fs_param_bad_value(log, param);
@@ -212,8 +214,11 @@ int fs_param_is_u32(struct p_log *log, const struct fs_parameter_spec *p,
struct fs_parameter *param, struct fs_parse_result *result)
{
int base = (unsigned long)p->data;
- if (param->type != fs_value_is_string ||
- kstrtouint(param->string, base, &result->uint_32) < 0)
+ if (param->type != fs_value_is_string)
+ return fs_param_bad_value(log, param);
+ if (!*param->string && (p->flags & fs_param_can_be_empty))
+ return 0;
+ if (kstrtouint(param->string, base, &result->uint_32) < 0)
return fs_param_bad_value(log, param);
return 0;
}
@@ -222,8 +227,11 @@ EXPORT_SYMBOL(fs_param_is_u32);
int fs_param_is_s32(struct p_log *log, const struct fs_parameter_spec *p,
struct fs_parameter *param, struct fs_parse_result *result)
{
- if (param->type != fs_value_is_string ||
- kstrtoint(param->string, 0, &result->int_32) < 0)
+ if (param->type != fs_value_is_string)
+ return fs_param_bad_value(log, param);
+ if (!*param->string && (p->flags & fs_param_can_be_empty))
+ return 0;
+ if (kstrtoint(param->string, 0, &result->int_32) < 0)
return fs_param_bad_value(log, param);
return 0;
}
@@ -232,8 +240,11 @@ EXPORT_SYMBOL(fs_param_is_s32);
int fs_param_is_u64(struct p_log *log, const struct fs_parameter_spec *p,
struct fs_parameter *param, struct fs_parse_result *result)
{
- if (param->type != fs_value_is_string ||
- kstrtoull(param->string, 0, &result->uint_64) < 0)
+ if (param->type != fs_value_is_string)
+ return fs_param_bad_value(log, param);
+ if (!*param->string && (p->flags & fs_param_can_be_empty))
+ return 0;
+ if (kstrtoull(param->string, 0, &result->uint_64) < 0)
return fs_param_bad_value(log, param);
return 0;
}
@@ -245,6 +256,8 @@ int fs_param_is_enum(struct p_log *log, const struct fs_parameter_spec *p,
const struct constant_table *c;
if (param->type != fs_value_is_string)
return fs_param_bad_value(log, param);
+ if (!*param->string && (p->flags & fs_param_can_be_empty))
+ return 0;
c = __lookup_constant(p->data, param->string);
if (!c)
return fs_param_bad_value(log, param);
@@ -256,7 +269,8 @@ EXPORT_SYMBOL(fs_param_is_enum);
int fs_param_is_string(struct p_log *log, const struct fs_parameter_spec *p,
struct fs_parameter *param, struct fs_parse_result *result)
{
- if (param->type != fs_value_is_string || !*param->string)
+ if (param->type != fs_value_is_string ||
+ (!*param->string && !(p->flags & fs_param_can_be_empty)))
return fs_param_bad_value(log, param);
return 0;
}
@@ -276,7 +290,8 @@ int fs_param_is_fd(struct p_log *log, const struct fs_parameter_spec *p,
{
switch (param->type) {
case fs_value_is_string:
- if (kstrtouint(param->string, 0, &result->uint_32) < 0)
+ if ((!*param->string && !(p->flags & fs_param_can_be_empty)) ||
+ kstrtouint(param->string, 0, &result->uint_32) < 0)
break;
if (result->uint_32 <= INT_MAX)
return 0;
diff --git a/include/linux/fs_parser.h b/include/linux/fs_parser.h
index 2eab6d5f6736..1cde756ef0fd 100644
--- a/include/linux/fs_parser.h
+++ b/include/linux/fs_parser.h
@@ -42,7 +42,7 @@ struct fs_parameter_spec {
u8 opt; /* Option number (returned by fs_parse()) */
unsigned short flags;
#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_can_be_empty 0x0004 /* "xxx=" is allowed */
#define fs_param_deprecated 0x0008 /* The param is deprecated */
const void *data;
};
--
2.21.1
next prev parent reply other threads:[~2020-04-28 16:45 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-28 16:45 [PATCH v2 00/17] ext4: new mount API conversion Lukas Czerner
2020-04-28 16:45 ` Lukas Czerner [this message]
2020-04-28 16:45 ` [PATCH v2 02/17] ext4: Add fs parameter specifications for mount options Lukas Czerner
2020-04-28 16:45 ` [PATCH v2 03/17] ext4: move option validation to a separate function Lukas Czerner
2020-04-28 16:45 ` [PATCH v2 04/17] ext4: Change handle_mount_opt() to use fs_parameter Lukas Czerner
2020-04-28 16:45 ` [PATCH v2 05/17] ext4: Allow sb to be NULL in ext4_msg() Lukas Czerner
2020-04-28 16:48 ` Christoph Hellwig
2020-04-28 16:57 ` Lukas Czerner
2020-04-29 2:53 ` Ian Kent
2020-04-29 11:09 ` Christoph Hellwig
2020-04-29 2:38 ` Eric Sandeen
2020-04-29 11:02 ` Lukas Czerner
2020-04-28 16:45 ` [PATCH v2 06/17] ext4: move quota configuration out of handle_mount_opt() Lukas Czerner
2020-04-28 16:45 ` [PATCH v2 07/17] ext4: check ext2/3 compatibility outside handle_mount_opt() Lukas Czerner
2020-04-28 16:45 ` [PATCH v2 08/17] ext4: get rid of super block and sbi from handle_mount_ops() Lukas Czerner
2020-04-28 16:45 ` [PATCH v2 09/17] ext4: parse Opt_sb in handle_mount_opt() Lukas Czerner
2020-04-28 16:45 ` [PATCH v2 10/17] ext4: clean up return values " Lukas Czerner
2020-04-28 16:45 ` [PATCH v2 11/17] ext4: add ext4_get_tree for the new mount API Lukas Czerner
2020-04-28 16:45 ` [PATCH v2 12/17] ext4: refactor ext4_remount() Lukas Czerner
2020-04-28 16:45 ` [PATCH v2 13/17] ext4: add ext4_reconfigure for the new mount API Lukas Czerner
2020-04-28 16:45 ` [PATCH v2 14/17] ext4: add ext4_fc_free " Lukas Czerner
2020-04-28 16:45 ` [PATCH v2 15/17] ext4: change token2str() to use ext4_param_specs Lukas Czerner
2020-04-28 16:45 ` [PATCH v2 16/17] ext4: switch to the new mount API Lukas Czerner
2020-04-28 16:45 ` [PATCH v2 17/17] ext4: Remove unused code from old mount api Lukas Czerner
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