Commit c950fd6f authored by Namhyung Kim's avatar Namhyung Kim Committed by Kees Cook

pstore: Split pstore fragile flags

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: Anton Vorontsov <anton@enomsg.org>
Cc: Colin Cross <ccross@android.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Len Brown <lenb@kernel.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: linux-acpi@vger.kernel.org
Cc: linux-efi@vger.kernel.org
Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
[kees: retained "FRAGILE" for now to make merges easier]
Signed-off-by: default avatarKees Cook <keescook@chromium.org>
parent d5a9bf0b
...@@ -938,7 +938,7 @@ static int erst_clearer(enum pstore_type_id type, u64 id, int count, ...@@ -938,7 +938,7 @@ static int erst_clearer(enum pstore_type_id type, u64 id, int count,
static struct pstore_info erst_info = { static struct pstore_info erst_info = {
.owner = THIS_MODULE, .owner = THIS_MODULE,
.name = "erst", .name = "erst",
.flags = PSTORE_FLAGS_FRAGILE, .flags = PSTORE_FLAGS_DMESG,
.open = erst_open_pstore, .open = erst_open_pstore,
.close = erst_close_pstore, .close = erst_close_pstore,
.read = erst_reader, .read = erst_reader,
......
...@@ -362,7 +362,7 @@ static int efi_pstore_erase(enum pstore_type_id type, u64 id, int count, ...@@ -362,7 +362,7 @@ static int efi_pstore_erase(enum pstore_type_id type, u64 id, int count,
static struct pstore_info efi_pstore_info = { static struct pstore_info efi_pstore_info = {
.owner = THIS_MODULE, .owner = THIS_MODULE,
.name = "efi", .name = "efi",
.flags = PSTORE_FLAGS_FRAGILE, .flags = PSTORE_FLAGS_DMESG,
.open = efi_pstore_open, .open = efi_pstore_open,
.close = efi_pstore_close, .close = efi_pstore_close,
.read = efi_pstore_read, .read = efi_pstore_read,
......
...@@ -659,13 +659,14 @@ int pstore_register(struct pstore_info *psi) ...@@ -659,13 +659,14 @@ int pstore_register(struct pstore_info *psi)
if (pstore_is_mounted()) if (pstore_is_mounted())
pstore_get_records(0); pstore_get_records(0);
pstore_register_kmsg(); if (psi->flags & PSTORE_FLAGS_DMESG)
pstore_register_kmsg();
if ((psi->flags & PSTORE_FLAGS_FRAGILE) == 0) { if (psi->flags & PSTORE_FLAGS_CONSOLE)
pstore_register_console(); pstore_register_console();
if (psi->flags & PSTORE_FLAGS_FTRACE)
pstore_register_ftrace(); pstore_register_ftrace();
if (psi->flags & PSTORE_FLAGS_PMSG)
pstore_register_pmsg(); pstore_register_pmsg();
}
if (pstore_update_ms >= 0) { if (pstore_update_ms >= 0) {
pstore_timer.expires = jiffies + pstore_timer.expires = jiffies +
...@@ -689,12 +690,14 @@ EXPORT_SYMBOL_GPL(pstore_register); ...@@ -689,12 +690,14 @@ EXPORT_SYMBOL_GPL(pstore_register);
void pstore_unregister(struct pstore_info *psi) void pstore_unregister(struct pstore_info *psi)
{ {
if ((psi->flags & PSTORE_FLAGS_FRAGILE) == 0) { if (psi->flags & PSTORE_FLAGS_PMSG)
pstore_unregister_pmsg(); pstore_unregister_pmsg();
if (psi->flags & PSTORE_FLAGS_FTRACE)
pstore_unregister_ftrace(); pstore_unregister_ftrace();
if (psi->flags & PSTORE_FLAGS_CONSOLE)
pstore_unregister_console(); pstore_unregister_console();
} if (psi->flags & PSTORE_FLAGS_DMESG)
pstore_unregister_kmsg(); pstore_unregister_kmsg();
free_buf_for_compression(); free_buf_for_compression();
......
...@@ -623,6 +623,8 @@ static int ramoops_probe(struct platform_device *pdev) ...@@ -623,6 +623,8 @@ static int ramoops_probe(struct platform_device *pdev)
goto fail_clear; goto fail_clear;
} }
cxt->pstore.flags = PSTORE_FLAGS_ALL;
err = pstore_register(&cxt->pstore); err = pstore_register(&cxt->pstore);
if (err) { if (err) {
pr_err("registering with pstore failed\n"); pr_err("registering with pstore failed\n");
......
...@@ -74,7 +74,13 @@ struct pstore_info { ...@@ -74,7 +74,13 @@ struct pstore_info {
void *data; void *data;
}; };
#define PSTORE_FLAGS_FRAGILE 1 #define PSTORE_FLAGS_DMESG (1 << 0)
#define PSTORE_FLAGS_FRAGILE PSTORE_FLAGS_DMESG
#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 int pstore_register(struct pstore_info *);
extern void pstore_unregister(struct pstore_info *); extern void pstore_unregister(struct pstore_info *);
......
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