Re: [RFC 2/6] pstore: remove type argument from ramoops_get_next_prz

2018-10-26 Thread Kees Cook
On Fri, Oct 26, 2018 at 7:00 PM, Joel Fernandes (Google)
 wrote:
> Since we store the type of the prz when we initialize it, we no longer
> need to pass it again in ramoops_get_next_prz since we can just use that
> to setup the pstore record. So lets remove it from the argument list.
>
> Signed-off-by: Joel Fernandes (Google) 

Yes yes. I like where this is going. :)

-Kees

> ---
>  fs/pstore/ram.c | 20 +++-
>  1 file changed, 7 insertions(+), 13 deletions(-)
>
> diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
> index c7cd858adce7..cbfdf4b8e89d 100644
> --- a/fs/pstore/ram.c
> +++ b/fs/pstore/ram.c
> @@ -125,9 +125,7 @@ static int ramoops_pstore_open(struct pstore_info *psi)
>
>  static struct persistent_ram_zone *
>  ramoops_get_next_prz(struct persistent_ram_zone *przs[], uint *c, uint max,
> -u64 *id,
> -enum pstore_type_id *typep, enum pstore_type_id type,
> -bool update)
> +u64 *id, enum pstore_type_id *typep, bool update)
>  {
> struct persistent_ram_zone *prz;
> int i = (*c)++;
> @@ -147,7 +145,7 @@ ramoops_get_next_prz(struct persistent_ram_zone *przs[], 
> uint *c, uint max,
> if (!persistent_ram_old_size(prz))
> return NULL;
>
> -   *typep = type;
> +   *typep = prz->type;
> *id = i;
>
> return prz;
> @@ -257,8 +255,7 @@ static ssize_t ramoops_pstore_read(struct pstore_record 
> *record)
> while (cxt->dump_read_cnt < cxt->max_dump_cnt && !prz) {
> prz = ramoops_get_next_prz(cxt->dprzs, >dump_read_cnt,
>cxt->max_dump_cnt, >id,
> -  >type,
> -  PSTORE_TYPE_DMESG, 1);
> +  >type, 1);
> if (!prz_ok(prz))
> continue;
> header_length = ramoops_read_kmsg_hdr(persistent_ram_old(prz),
> @@ -274,20 +271,18 @@ static ssize_t ramoops_pstore_read(struct pstore_record 
> *record)
>
> if (!prz_ok(prz))
> prz = ramoops_get_next_prz(>cprz, >console_read_cnt,
> -  1, >id, >type,
> -  PSTORE_TYPE_CONSOLE, 0);
> +  1, >id, >type, 0);
>
> if (!prz_ok(prz))
> prz = ramoops_get_next_prz(>mprz, >pmsg_read_cnt,
> -  1, >id, >type,
> -  PSTORE_TYPE_PMSG, 0);
> +  1, >id, >type, 0);
>
> /* ftrace is last since it may want to dynamically allocate memory. */
> if (!prz_ok(prz)) {
> if (!(cxt->flags & RAMOOPS_FLAG_FTRACE_PER_CPU)) {
> prz = ramoops_get_next_prz(cxt->fprzs,
> >ftrace_read_cnt, 1, >id,
> -   >type, PSTORE_TYPE_FTRACE, 0);
> +   >type, 0);
> } else {
> /*
>  * Build a new dummy record which combines all the
> @@ -306,8 +301,7 @@ static ssize_t ramoops_pstore_read(struct pstore_record 
> *record)
> >ftrace_read_cnt,
> cxt->max_ftrace_cnt,
> >id,
> -   >type,
> -   PSTORE_TYPE_FTRACE, 0);
> +   >type, 0);
>
> if (!prz_ok(prz_next))
> continue;
> --
> 2.19.1.568.g152ad8e336-goog
>



-- 
Kees Cook


Re: [RFC 2/6] pstore: remove type argument from ramoops_get_next_prz

2018-10-26 Thread Kees Cook
On Fri, Oct 26, 2018 at 7:00 PM, Joel Fernandes (Google)
 wrote:
> Since we store the type of the prz when we initialize it, we no longer
> need to pass it again in ramoops_get_next_prz since we can just use that
> to setup the pstore record. So lets remove it from the argument list.
>
> Signed-off-by: Joel Fernandes (Google) 

Yes yes. I like where this is going. :)

-Kees

> ---
>  fs/pstore/ram.c | 20 +++-
>  1 file changed, 7 insertions(+), 13 deletions(-)
>
> diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
> index c7cd858adce7..cbfdf4b8e89d 100644
> --- a/fs/pstore/ram.c
> +++ b/fs/pstore/ram.c
> @@ -125,9 +125,7 @@ static int ramoops_pstore_open(struct pstore_info *psi)
>
>  static struct persistent_ram_zone *
>  ramoops_get_next_prz(struct persistent_ram_zone *przs[], uint *c, uint max,
> -u64 *id,
> -enum pstore_type_id *typep, enum pstore_type_id type,
> -bool update)
> +u64 *id, enum pstore_type_id *typep, bool update)
>  {
> struct persistent_ram_zone *prz;
> int i = (*c)++;
> @@ -147,7 +145,7 @@ ramoops_get_next_prz(struct persistent_ram_zone *przs[], 
> uint *c, uint max,
> if (!persistent_ram_old_size(prz))
> return NULL;
>
> -   *typep = type;
> +   *typep = prz->type;
> *id = i;
>
> return prz;
> @@ -257,8 +255,7 @@ static ssize_t ramoops_pstore_read(struct pstore_record 
> *record)
> while (cxt->dump_read_cnt < cxt->max_dump_cnt && !prz) {
> prz = ramoops_get_next_prz(cxt->dprzs, >dump_read_cnt,
>cxt->max_dump_cnt, >id,
> -  >type,
> -  PSTORE_TYPE_DMESG, 1);
> +  >type, 1);
> if (!prz_ok(prz))
> continue;
> header_length = ramoops_read_kmsg_hdr(persistent_ram_old(prz),
> @@ -274,20 +271,18 @@ static ssize_t ramoops_pstore_read(struct pstore_record 
> *record)
>
> if (!prz_ok(prz))
> prz = ramoops_get_next_prz(>cprz, >console_read_cnt,
> -  1, >id, >type,
> -  PSTORE_TYPE_CONSOLE, 0);
> +  1, >id, >type, 0);
>
> if (!prz_ok(prz))
> prz = ramoops_get_next_prz(>mprz, >pmsg_read_cnt,
> -  1, >id, >type,
> -  PSTORE_TYPE_PMSG, 0);
> +  1, >id, >type, 0);
>
> /* ftrace is last since it may want to dynamically allocate memory. */
> if (!prz_ok(prz)) {
> if (!(cxt->flags & RAMOOPS_FLAG_FTRACE_PER_CPU)) {
> prz = ramoops_get_next_prz(cxt->fprzs,
> >ftrace_read_cnt, 1, >id,
> -   >type, PSTORE_TYPE_FTRACE, 0);
> +   >type, 0);
> } else {
> /*
>  * Build a new dummy record which combines all the
> @@ -306,8 +301,7 @@ static ssize_t ramoops_pstore_read(struct pstore_record 
> *record)
> >ftrace_read_cnt,
> cxt->max_ftrace_cnt,
> >id,
> -   >type,
> -   PSTORE_TYPE_FTRACE, 0);
> +   >type, 0);
>
> if (!prz_ok(prz_next))
> continue;
> --
> 2.19.1.568.g152ad8e336-goog
>



-- 
Kees Cook


[RFC 2/6] pstore: remove type argument from ramoops_get_next_prz

2018-10-26 Thread Joel Fernandes (Google)
Since we store the type of the prz when we initialize it, we no longer
need to pass it again in ramoops_get_next_prz since we can just use that
to setup the pstore record. So lets remove it from the argument list.

Signed-off-by: Joel Fernandes (Google) 
---
 fs/pstore/ram.c | 20 +++-
 1 file changed, 7 insertions(+), 13 deletions(-)

diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index c7cd858adce7..cbfdf4b8e89d 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -125,9 +125,7 @@ static int ramoops_pstore_open(struct pstore_info *psi)
 
 static struct persistent_ram_zone *
 ramoops_get_next_prz(struct persistent_ram_zone *przs[], uint *c, uint max,
-u64 *id,
-enum pstore_type_id *typep, enum pstore_type_id type,
-bool update)
+u64 *id, enum pstore_type_id *typep, bool update)
 {
struct persistent_ram_zone *prz;
int i = (*c)++;
@@ -147,7 +145,7 @@ ramoops_get_next_prz(struct persistent_ram_zone *przs[], 
uint *c, uint max,
if (!persistent_ram_old_size(prz))
return NULL;
 
-   *typep = type;
+   *typep = prz->type;
*id = i;
 
return prz;
@@ -257,8 +255,7 @@ static ssize_t ramoops_pstore_read(struct pstore_record 
*record)
while (cxt->dump_read_cnt < cxt->max_dump_cnt && !prz) {
prz = ramoops_get_next_prz(cxt->dprzs, >dump_read_cnt,
   cxt->max_dump_cnt, >id,
-  >type,
-  PSTORE_TYPE_DMESG, 1);
+  >type, 1);
if (!prz_ok(prz))
continue;
header_length = ramoops_read_kmsg_hdr(persistent_ram_old(prz),
@@ -274,20 +271,18 @@ static ssize_t ramoops_pstore_read(struct pstore_record 
*record)
 
if (!prz_ok(prz))
prz = ramoops_get_next_prz(>cprz, >console_read_cnt,
-  1, >id, >type,
-  PSTORE_TYPE_CONSOLE, 0);
+  1, >id, >type, 0);
 
if (!prz_ok(prz))
prz = ramoops_get_next_prz(>mprz, >pmsg_read_cnt,
-  1, >id, >type,
-  PSTORE_TYPE_PMSG, 0);
+  1, >id, >type, 0);
 
/* ftrace is last since it may want to dynamically allocate memory. */
if (!prz_ok(prz)) {
if (!(cxt->flags & RAMOOPS_FLAG_FTRACE_PER_CPU)) {
prz = ramoops_get_next_prz(cxt->fprzs,
>ftrace_read_cnt, 1, >id,
-   >type, PSTORE_TYPE_FTRACE, 0);
+   >type, 0);
} else {
/*
 * Build a new dummy record which combines all the
@@ -306,8 +301,7 @@ static ssize_t ramoops_pstore_read(struct pstore_record 
*record)
>ftrace_read_cnt,
cxt->max_ftrace_cnt,
>id,
-   >type,
-   PSTORE_TYPE_FTRACE, 0);
+   >type, 0);
 
if (!prz_ok(prz_next))
continue;
-- 
2.19.1.568.g152ad8e336-goog



[RFC 2/6] pstore: remove type argument from ramoops_get_next_prz

2018-10-26 Thread Joel Fernandes (Google)
Since we store the type of the prz when we initialize it, we no longer
need to pass it again in ramoops_get_next_prz since we can just use that
to setup the pstore record. So lets remove it from the argument list.

Signed-off-by: Joel Fernandes (Google) 
---
 fs/pstore/ram.c | 20 +++-
 1 file changed, 7 insertions(+), 13 deletions(-)

diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index c7cd858adce7..cbfdf4b8e89d 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -125,9 +125,7 @@ static int ramoops_pstore_open(struct pstore_info *psi)
 
 static struct persistent_ram_zone *
 ramoops_get_next_prz(struct persistent_ram_zone *przs[], uint *c, uint max,
-u64 *id,
-enum pstore_type_id *typep, enum pstore_type_id type,
-bool update)
+u64 *id, enum pstore_type_id *typep, bool update)
 {
struct persistent_ram_zone *prz;
int i = (*c)++;
@@ -147,7 +145,7 @@ ramoops_get_next_prz(struct persistent_ram_zone *przs[], 
uint *c, uint max,
if (!persistent_ram_old_size(prz))
return NULL;
 
-   *typep = type;
+   *typep = prz->type;
*id = i;
 
return prz;
@@ -257,8 +255,7 @@ static ssize_t ramoops_pstore_read(struct pstore_record 
*record)
while (cxt->dump_read_cnt < cxt->max_dump_cnt && !prz) {
prz = ramoops_get_next_prz(cxt->dprzs, >dump_read_cnt,
   cxt->max_dump_cnt, >id,
-  >type,
-  PSTORE_TYPE_DMESG, 1);
+  >type, 1);
if (!prz_ok(prz))
continue;
header_length = ramoops_read_kmsg_hdr(persistent_ram_old(prz),
@@ -274,20 +271,18 @@ static ssize_t ramoops_pstore_read(struct pstore_record 
*record)
 
if (!prz_ok(prz))
prz = ramoops_get_next_prz(>cprz, >console_read_cnt,
-  1, >id, >type,
-  PSTORE_TYPE_CONSOLE, 0);
+  1, >id, >type, 0);
 
if (!prz_ok(prz))
prz = ramoops_get_next_prz(>mprz, >pmsg_read_cnt,
-  1, >id, >type,
-  PSTORE_TYPE_PMSG, 0);
+  1, >id, >type, 0);
 
/* ftrace is last since it may want to dynamically allocate memory. */
if (!prz_ok(prz)) {
if (!(cxt->flags & RAMOOPS_FLAG_FTRACE_PER_CPU)) {
prz = ramoops_get_next_prz(cxt->fprzs,
>ftrace_read_cnt, 1, >id,
-   >type, PSTORE_TYPE_FTRACE, 0);
+   >type, 0);
} else {
/*
 * Build a new dummy record which combines all the
@@ -306,8 +301,7 @@ static ssize_t ramoops_pstore_read(struct pstore_record 
*record)
>ftrace_read_cnt,
cxt->max_ftrace_cnt,
>id,
-   >type,
-   PSTORE_TYPE_FTRACE, 0);
+   >type, 0);
 
if (!prz_ok(prz_next))
continue;
-- 
2.19.1.568.g152ad8e336-goog