-Remove obsolete simple_str functions.
-Return error code when kstr failed.
-This patch also calls functions corresponding to destination type.
Basically it's an RFC because of the type mismatch all over the place.
ie code was doing simple_strtol to integer...
Newer kstr functions detect such problems.
By default I used destination type as a reference. Maybe it's wrong and we
really want to read long, unsigned long from source ?
Signed-off-by: Fabian Frederick <[email protected]>
---
fs/gfs2/sys.c | 56 ++++++++++++++++++++++++++++++++++++++++++++------------
1 file changed, 44 insertions(+), 12 deletions(-)
diff --git a/fs/gfs2/sys.c b/fs/gfs2/sys.c
index ae8e881..436bdeb 100644
--- a/fs/gfs2/sys.c
+++ b/fs/gfs2/sys.c
@@ -101,8 +101,11 @@ static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
{
- int error;
- int n = simple_strtol(buf, NULL, 0);
+ int error, n;
+
+ error = kstrtoint(buf, 0, &n);
+ if (error)
+ return error;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
@@ -134,10 +137,16 @@ static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
{
+ int error, val;
+
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (simple_strtol(buf, NULL, 0) != 1)
+ error = kstrtoint(buf, 0, &val);
+ if (error)
+ return error;
+
+ if (val != -1)
return -EINVAL;
gfs2_lm_withdraw(sdp, "withdrawing from cluster at user's request\n");
@@ -148,10 +157,16 @@ static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
size_t len)
{
+ int error, val;
+
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (simple_strtol(buf, NULL, 0) != 1)
+ error = kstrtoint(buf, 0, &val);
+ if (error)
+ return error;
+
+ if (val != -1)
return -EINVAL;
gfs2_statfs_sync(sdp->sd_vfs, 0);
@@ -161,10 +176,16 @@ static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
size_t len)
{
+ int error, val;
+
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (simple_strtol(buf, NULL, 0) != 1)
+ error = kstrtoint(buf, 0, &val);
+ if (error)
+ return error;
+
+ if (val != -1)
return -EINVAL;
gfs2_quota_sync(sdp->sd_vfs, 0);
@@ -181,7 +202,9 @@ static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- id = simple_strtoul(buf, NULL, 0);
+ error = kstrtou32(buf, 0, &id);
+ if (error)
+ return error;
qid = make_kqid(current_user_ns(), USRQUOTA, id);
if (!qid_valid(qid))
@@ -201,7 +224,9 @@ static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- id = simple_strtoul(buf, NULL, 0);
+ error = kstrtou32(buf, 0, &id);
+ if (error)
+ return error;
qid = make_kqid(current_user_ns(), GRPQUOTA, id);
if (!qid_valid(qid))
@@ -325,9 +350,11 @@ static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
{
struct lm_lockstruct *ls = &sdp->sd_lockstruct;
ssize_t ret = len;
- int val;
+ int val, error;
- val = simple_strtol(buf, NULL, 0);
+ error = kstrtoint(buf, 0, &val);
+ if (error)
+ return error;
if (val == 1)
set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
@@ -351,9 +378,11 @@ static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf)
static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
{
ssize_t ret = len;
- int val;
+ int val, error;
- val = simple_strtol(buf, NULL, 0);
+ error = kstrtoint(buf, 0, &val);
+ if (error)
+ return error;
if ((val == 1) &&
!strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
@@ -553,11 +582,14 @@ static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
{
struct gfs2_tune *gt = &sdp->sd_tune;
unsigned int x;
+ int error;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- x = simple_strtoul(buf, NULL, 0);
+ error = kstrtouint(buf, 0, &x);
+ if (error)
+ return error;
if (check_zero && !x)
return -EINVAL;
--
1.9.1
Hi,
On 29/04/15 19:54, Fabian Frederick wrote:
> -Remove obsolete simple_str functions.
> -Return error code when kstr failed.
> -This patch also calls functions corresponding to destination type.
>
> Basically it's an RFC because of the type mismatch all over the place.
> ie code was doing simple_strtol to integer...
> Newer kstr functions detect such problems.
> By default I used destination type as a reference. Maybe it's wrong and we
> really want to read long, unsigned long from source ?
>
> Signed-off-by: Fabian Frederick <[email protected]>
Looks correct to me. Most of those are simple 1 or 0 interfaces anyway.
Acked-by: Steven Whitehouse <[email protected]>
Steve.
> ---
> fs/gfs2/sys.c | 56 ++++++++++++++++++++++++++++++++++++++++++++------------
> 1 file changed, 44 insertions(+), 12 deletions(-)
>
> diff --git a/fs/gfs2/sys.c b/fs/gfs2/sys.c
> index ae8e881..436bdeb 100644
> --- a/fs/gfs2/sys.c
> +++ b/fs/gfs2/sys.c
> @@ -101,8 +101,11 @@ static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
>
> static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
> {
> - int error;
> - int n = simple_strtol(buf, NULL, 0);
> + int error, n;
> +
> + error = kstrtoint(buf, 0, &n);
> + if (error)
> + return error;
>
> if (!capable(CAP_SYS_ADMIN))
> return -EPERM;
> @@ -134,10 +137,16 @@ static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
>
> static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
> {
> + int error, val;
> +
> if (!capable(CAP_SYS_ADMIN))
> return -EPERM;
>
> - if (simple_strtol(buf, NULL, 0) != 1)
> + error = kstrtoint(buf, 0, &val);
> + if (error)
> + return error;
> +
> + if (val != -1)
> return -EINVAL;
>
> gfs2_lm_withdraw(sdp, "withdrawing from cluster at user's request\n");
> @@ -148,10 +157,16 @@ static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
> static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
> size_t len)
> {
> + int error, val;
> +
> if (!capable(CAP_SYS_ADMIN))
> return -EPERM;
>
> - if (simple_strtol(buf, NULL, 0) != 1)
> + error = kstrtoint(buf, 0, &val);
> + if (error)
> + return error;
> +
> + if (val != -1)
> return -EINVAL;
>
> gfs2_statfs_sync(sdp->sd_vfs, 0);
> @@ -161,10 +176,16 @@ static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
> static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
> size_t len)
> {
> + int error, val;
> +
> if (!capable(CAP_SYS_ADMIN))
> return -EPERM;
>
> - if (simple_strtol(buf, NULL, 0) != 1)
> + error = kstrtoint(buf, 0, &val);
> + if (error)
> + return error;
> +
> + if (val != -1)
> return -EINVAL;
>
> gfs2_quota_sync(sdp->sd_vfs, 0);
> @@ -181,7 +202,9 @@ static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
> if (!capable(CAP_SYS_ADMIN))
> return -EPERM;
>
> - id = simple_strtoul(buf, NULL, 0);
> + error = kstrtou32(buf, 0, &id);
> + if (error)
> + return error;
>
> qid = make_kqid(current_user_ns(), USRQUOTA, id);
> if (!qid_valid(qid))
> @@ -201,7 +224,9 @@ static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
> if (!capable(CAP_SYS_ADMIN))
> return -EPERM;
>
> - id = simple_strtoul(buf, NULL, 0);
> + error = kstrtou32(buf, 0, &id);
> + if (error)
> + return error;
>
> qid = make_kqid(current_user_ns(), GRPQUOTA, id);
> if (!qid_valid(qid))
> @@ -325,9 +350,11 @@ static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
> {
> struct lm_lockstruct *ls = &sdp->sd_lockstruct;
> ssize_t ret = len;
> - int val;
> + int val, error;
>
> - val = simple_strtol(buf, NULL, 0);
> + error = kstrtoint(buf, 0, &val);
> + if (error)
> + return error;
>
> if (val == 1)
> set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
> @@ -351,9 +378,11 @@ static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf)
> static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
> {
> ssize_t ret = len;
> - int val;
> + int val, error;
>
> - val = simple_strtol(buf, NULL, 0);
> + error = kstrtoint(buf, 0, &val);
> + if (error)
> + return error;
>
> if ((val == 1) &&
> !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
> @@ -553,11 +582,14 @@ static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
> {
> struct gfs2_tune *gt = &sdp->sd_tune;
> unsigned int x;
> + int error;
>
> if (!capable(CAP_SYS_ADMIN))
> return -EPERM;
>
> - x = simple_strtoul(buf, NULL, 0);
> + error = kstrtouint(buf, 0, &x);
> + if (error)
> + return error;
>
> if (check_zero && !x)
> return -EINVAL;
[cc linux-kernel]
On Thu, Apr 30, 2015 at 1:53 PM, Alexey Dobriyan <[email protected]> wrote:
>> By default I used destination type as a reference. Maybe it's wrong and
>> we really want to read long, unsigned long from source ?
>
> long and unsigned long -- no. Always look at type of data.
> There are many places where unsigned long is needlessly
> used because there is no simple_strtoint().
>
> Your patch is OK except block_store() wdack_store() chunks:
>
>> @@ static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
>> ssize_t ret = len;
>> - int val;
>> + int val, error;
>
> There is no need to add second "error" variable and
> there is no need for it to be ssize_t:
>
> int ret;
>
> ret = kstrtoint();
> if (ret < 0)
> return ret;
> if (val == 1)
> ...
> else if (val == 0)
> ...
> else
> return -EINVAL;
> return len;
>
> Overall, this code is exactly code kstrto*() was designed for.