This patch adds new PSTORE_FLAGS for each pstore type so that they can
be enabled separately. This is a preparation for ongoing virtio-pstore
work to support those types flexibly.
The PSTORE_FLAGS_FRAGILE is changed to PSTORE_FLAGS_DMESG to preserve the
original behavior.
Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
Cc: Len Brown <lenb@xxxxxxxxxx>
Cc: Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx>
Cc: linux-acpi@xxxxxxxxxxxxxxx
Cc: linux-efi@xxxxxxxxxxxxxxx
Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
---
drivers/acpi/apei/erst.c | 2 +-
drivers/firmware/efi/efi-pstore.c | 2 +-
fs/pstore/platform.c | 21 +++++++++++++--------
fs/pstore/ram.c | 2 ++
include/linux/pstore.h | 7 ++++++-
5 files changed, 23 insertions(+), 11 deletions(-)
diff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c
index 006c3894c6ea..f0cb7b0fbac8 100644
--- a/drivers/acpi/apei/erst.c
+++ b/drivers/acpi/apei/erst.c
@@ -937,7 +937,7 @@ static int erst_clearer(enum pstore_type_id type, u64 id, int count,
static struct pstore_info erst_info = {
.owner = THIS_MODULE,
.name = "erst",
- .flags = PSTORE_FLAGS_FRAGILE,
+ .flags = PSTORE_FLAGS_DMESG,
.open = erst_open_pstore,
.close = erst_close_pstore,
.read = erst_reader,
diff --git a/drivers/firmware/efi/efi-pstore.c b/drivers/firmware/efi/efi-pstore.c
index eac76a79a880..dcb61a6f7ea7 100644
--- a/drivers/firmware/efi/efi-pstore.c
+++ b/drivers/firmware/efi/efi-pstore.c
@@ -356,7 +356,7 @@ static int efi_pstore_erase(enum pstore_type_id type, u64 id, int count,
static struct pstore_info efi_pstore_info = {
.owner = THIS_MODULE,
.name = "efi",
- .flags = PSTORE_FLAGS_FRAGILE,
+ .flags = PSTORE_FLAGS_DMESG,
.open = efi_pstore_open,
.close = efi_pstore_close,
.read = efi_pstore_read,
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 588461bb2dd4..6e86b7ea095d 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -467,13 +467,14 @@ int pstore_register(struct pstore_info *psi)
if (pstore_is_mounted())
pstore_get_records(0);
- pstore_register_kmsg();
-
- if ((psi->flags & PSTORE_FLAGS_FRAGILE) == 0) {
+ if (psi->flags & PSTORE_FLAGS_DMESG)
+ pstore_register_kmsg();
+ if (psi->flags & PSTORE_FLAGS_CONSOLE)
pstore_register_console();
+ if (psi->flags & PSTORE_FLAGS_FTRACE)
pstore_register_ftrace();
+ if (psi->flags & PSTORE_FLAGS_PMSG)
pstore_register_pmsg();
- }
if (pstore_update_ms >= 0) {
pstore_timer.expires = jiffies +
@@ -497,10 +498,14 @@ EXPORT_SYMBOL_GPL(pstore_register);
void pstore_unregister(struct pstore_info *psi)
{
- pstore_unregister_pmsg();
- pstore_unregister_ftrace();
- pstore_unregister_console();
- pstore_unregister_kmsg();
+ if (psi->flags & PSTORE_FLAGS_PMSG)
+ pstore_unregister_pmsg();
+ if (psi->flags & PSTORE_FLAGS_FTRACE)
+ pstore_unregister_ftrace();
+ if (psi->flags & PSTORE_FLAGS_CONSOLE)
+ pstore_unregister_console();
+ if (psi->flags & PSTORE_FLAGS_DMESG)
+ pstore_unregister_kmsg();
free_buf_for_compression();
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index bd9812e83461..d08bfd611b11 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -539,6 +539,8 @@ static int ramoops_probe(struct platform_device *pdev)
goto fail_clear;
}
+ cxt->pstore.flags = PSTORE_FLAGS_ALL;
+
err = pstore_register(&cxt->pstore);
if (err) {
pr_err("registering with pstore failed\n");
diff --git a/include/linux/pstore.h b/include/linux/pstore.h
index 831479f8df8f..3ba0c1af40e5 100644
--- a/include/linux/pstore.h
+++ b/include/linux/pstore.h
@@ -73,7 +73,12 @@ struct pstore_info {
void *data;
};
-#define PSTORE_FLAGS_FRAGILE 1
+#define PSTORE_FLAGS_DMESG (1 << 0)
+#define PSTORE_FLAGS_CONSOLE (1 << 1)
+#define PSTORE_FLAGS_FTRACE (1 << 2)
+#define PSTORE_FLAGS_PMSG (1 << 3)
+
+#define PSTORE_FLAGS_ALL ((1 << 4) - 1)
extern int pstore_register(struct pstore_info *);
extern void pstore_unregister(struct pstore_info *);
--
2.8.0
--
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