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From: Juergen Borleis <jbe@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Kees Cook <keescook@chromium.org>
Subject: [PATCH 08/15] pstore: Extract common arguments into structure
Date: Fri, 15 Mar 2019 10:14:46 +0100	[thread overview]
Message-ID: <20190315091453.22393-8-jbe@pengutronix.de> (raw)
In-Reply-To: <20190315091453.22393-1-jbe@pengutronix.de>

From: Kees Cook <keescook@chromium.org>

The read/mkfile pair pass the same arguments and should be cleared
between calls. Move to a structure and wipe it after every loop.

Signed-off-by: Kees Cook <keescook@chromium.org>
[p.zabel@pengutronix.de: ported to Barebox from Linux commit 9abdcccc3d5f]
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
---
 fs/pstore/platform.c   | 30 +++++++++++++++++-------------
 include/linux/pstore.h | 15 ++++++++++++++-
 2 files changed, 31 insertions(+), 14 deletions(-)

diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 963ecafef8..6eebad63de 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -96,13 +96,8 @@ EXPORT_SYMBOL_GPL(pstore_register);
 void pstore_get_records(int quiet)
 {
 	struct pstore_info *psi = psinfo;
-	char			*buf = NULL;
-	ssize_t			size;
-	u64			id;
-	int			count;
-	enum pstore_type_id	type;
+	struct pstore_record	record = { .psi = psi, };
 	int			failed = 0, rc;
-	bool			compressed;
 	int			unzipped_len = -1;
 
 	if (!psi)
@@ -112,22 +107,31 @@ void pstore_get_records(int quiet)
 	if (psi->open && psi->open(psi))
 		goto out;
 
-	while ((size = psi->read(&id, &type, &count, &buf, &compressed,
-				psi)) > 0) {
-		if (compressed && (type == PSTORE_TYPE_DMESG)) {
+	while ((record.size = psi->read(&record.id, &record.type,
+					&record.count,
+					&record.buf, &record.compressed,
+					record.psi)) > 0) {
+		if (record.compressed &&
+		    record.type == PSTORE_TYPE_DMESG) {
 			pr_err("barebox does not have ramoops compression support\n");
 			continue;
 		}
-		rc = pstore_mkfile(type, psi->name, id, count, buf,
-				  compressed, (size_t)size, psi);
+		rc = pstore_mkfile(record.type, psi->name, record.id,
+				   record.count, record.buf,
+				   record.compressed,
+				   record.size,
+				   record.psi);
 		if (unzipped_len < 0) {
 			/* Free buffer other than big oops */
-			kfree(buf);
-			buf = NULL;
+			kfree(record.buf);
+			record.buf = NULL;
 		} else
 			unzipped_len = -1;
 		if (rc && (rc != -EEXIST || !quiet))
 			failed++;
+
+		memset(&record, 0, sizeof(record));
+		record.psi = psi;
 	}
 	if (psi->close)
 		psi->close(psi);
diff --git a/include/linux/pstore.h b/include/linux/pstore.h
index a925e14397..23f35570aa 100644
--- a/include/linux/pstore.h
+++ b/include/linux/pstore.h
@@ -25,6 +25,8 @@
 #include <linux/types.h>
 #include <asm-generic/errno.h>
 
+struct module;
+
 /* types */
 enum pstore_type_id {
 	PSTORE_TYPE_DMESG	= 0,
@@ -43,7 +45,18 @@ enum kmsg_dump_reason {
 	KMSG_DUMP_UNDEF,
 };
 
-struct module;
+struct pstore_info;
+
+struct pstore_record {
+	struct pstore_info	*psi;
+	enum pstore_type_id	type;
+	u64			id;
+	char			*buf;
+	int			count;
+	bool			compressed;
+	ssize_t			size;
+	ssize_t			ecc_notice_size;
+};
 
 struct pstore_info {
 	struct module	*owner;
-- 
2.11.0


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  parent reply	other threads:[~2019-03-15  9:15 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-15  9:14 [PATCH 01/15] ramoops: probe from device tree if OFTREE is enabled Juergen Borleis
2019-03-15  9:14 ` [PATCH 02/15] pstore/ram: add Device Tree bindings Juergen Borleis
2019-03-15  9:14 ` [PATCH 03/15] ramoops: use DT reserved-memory bindings Juergen Borleis
2019-03-15  9:14 ` [PATCH 04/15] pstore: Make ramoops_init_przs generic for other prz arrays Juergen Borleis
2019-03-15  9:14 ` [PATCH 05/15] pstore/ram: Do not use stack VLA for parity workspace Juergen Borleis
2019-03-15  9:14 ` [PATCH 06/15] pstore: improve error report for failed setup Juergen Borleis
2019-03-15  9:14 ` [PATCH 07/15] pstore/ram: Clarify resource reservation labels Juergen Borleis
2019-03-15  9:14 ` Juergen Borleis [this message]
2019-03-15  9:14 ` [PATCH 09/15] pstore: add console support Juergen Borleis
2019-03-15  9:14 ` [PATCH 10/15] pstore: Switch pstore_mkfile to pass record Juergen Borleis
2019-03-15  9:14 ` [PATCH 11/15] pstore: Replace arguments for read() API Juergen Borleis
2019-03-15  9:14 ` [PATCH 12/15] pstore: Replace arguments for write() API Juergen Borleis
2019-03-15  9:14 ` [PATCH 13/15] pstore: pass ramoops configuration to kernel via device tree Juergen Borleis
2019-03-15  9:14 ` [PATCH 14/15] pstore: ramoops: allow zapping invalid buffers in read-only mode Juergen Borleis
2019-03-15  9:14 ` [PATCH 15/15] pstore/doc: fix layout Juergen Borleis
2019-03-18  8:44 ` [PATCH 01/15] ramoops: probe from device tree if OFTREE is enabled Sascha Hauer

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