linux-kernel - [PATCH] Differentiating names by adding a timestamp.

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Date:	Mon, 28 Oct 2013 21:22:25 +0800
From:	Madper Xie <cxie@...hat.com>
To:	Tony Luck <tony.luck@...il.com>,
	Seiji Aguchi <seiji.aguchi@....com>,
	Anton Vorontsov <cbou@...l.ru>,
	Colin Cross <ccross@...gle.com>, Kees Cook <kees@...flux.net>
Cc:	"linux-efi\@vger.kernel.org" <linux-efi@...r.kernel.org>,
	"linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] Differentiating names by adding a timestamp.


pstore denominate dumped file as type-psname-id. it makes many file have
the same name if there are many entries in backend have the same id.
So adding a timestamp to file name.

Signed-off-by: Madper Xie <cxie@...hat.com>
---
 fs/pstore/inode.c | 26 ++++++++++++++++----------
 1 file changed, 16 insertions(+), 10 deletions(-)

diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c
index 1282384..bf6ed3a 100644
--- a/fs/pstore/inode.c
+++ b/fs/pstore/inode.c
@@ -315,32 +315,38 @@ int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, int count,
 
 	switch (type) {
 	case PSTORE_TYPE_DMESG:
-		sprintf(name, "dmesg-%s-%lld%s", psname, id,
-						compressed ? ".enc.z" : "");
+		sprintf(name, "dmesg-%s-%lld-%lld%s", psname, id,
+			timespec_to_ns(&time), compressed ? ".enc.z" : "");
 		break;
 	case PSTORE_TYPE_CONSOLE:
-		sprintf(name, "console-%s", psname);
+		sprintf(name, "console-%s-%lld", psname, timespec_to_ns(&time));
 		break;
 	case PSTORE_TYPE_FTRACE:
-		sprintf(name, "ftrace-%s", psname);
+		sprintf(name, "ftrace-%s-%lld", psname, timespec_to_ns(&time));
 		break;
 	case PSTORE_TYPE_MCE:
-		sprintf(name, "mce-%s-%lld", psname, id);
+		sprintf(name, "mce-%s-%lld-%lld", psname, id,
+			timespec_to_ns(&time));
 		break;
 	case PSTORE_TYPE_PPC_RTAS:
-		sprintf(name, "rtas-%s-%lld", psname, id);
+		sprintf(name, "rtas-%s-%lld-%lld", psname, id,
+			timespec_to_ns(&time));
 		break;
 	case PSTORE_TYPE_PPC_OF:
-		sprintf(name, "powerpc-ofw-%s-%lld", psname, id);
+		sprintf(name, "powerpc-ofw-%s-%lld-%lld", psname, id,
+			timespec_to_ns(&time));
 		break;
 	case PSTORE_TYPE_PPC_COMMON:
-		sprintf(name, "powerpc-common-%s-%lld", psname, id);
+		sprintf(name, "powerpc-common-%s-%lld-%lld", psname, id,
+			timespec_to_ns(&time));
 		break;
 	case PSTORE_TYPE_UNKNOWN:
-		sprintf(name, "unknown-%s-%lld", psname, id);
+		sprintf(name, "unknown-%s-%lld-%lld", psname, id,
+			timespec_to_ns(&time));
 		break;
 	default:
-		sprintf(name, "type%d-%s-%lld", type, psname, id);
+		sprintf(name, "type%d-%s-%lld-%lld", type, psname, id,
+			timespec_to_ns(&time));
 		break;
 	}
 
-- 
1.8.4.1
--
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