Commit d4bf205d authored Oct 12, 2014 by Valdis Kletnieks Committed by Tony Luck Oct 15, 2014

pstore: Fix duplicate {console,ftrace}-efi entries



The pstore filesystem still creates duplicate filename/inode pairs for
some pstore types.  Add the id to the filename to prevent that.

Before patch:

[/sys/fs/pstore] ls -li
total 0
1250 -r--r--r--. 1 root root 67 Sep 29 17:09 console-efi
1250 -r--r--r--. 1 root root 67 Sep 29 17:09 console-efi
1250 -r--r--r--. 1 root root 67 Sep 29 17:09 console-efi
1250 -r--r--r--. 1 root root 67 Sep 29 17:09 console-efi
1250 -r--r--r--. 1 root root 67 Sep 29 17:09 console-efi
1250 -r--r--r--. 1 root root 67 Sep 29 17:09 console-efi
1250 -r--r--r--. 1 root root 67 Sep 29 17:09 console-efi
1250 -r--r--r--. 1 root root 67 Sep 29 17:09 console-efi
1250 -r--r--r--. 1 root root 67 Sep 29 17:09 console-efi

After:

[/sys/fs/pstore] ls -li
total 0
1232 -r--r--r--. 1 root root 148 Sep 29 17:09 console-efi-141202499100000
1231 -r--r--r--. 1 root root  67 Sep 29 17:09 console-efi-141202499200000
1230 -r--r--r--. 1 root root 148 Sep 29 17:44 console-efi-141202705400000
1229 -r--r--r--. 1 root root  67 Sep 29 17:44 console-efi-141202705500000
1228 -r--r--r--. 1 root root  67 Sep 29 20:42 console-efi-141203772600000
1227 -r--r--r--. 1 root root 148 Sep 29 23:42 console-efi-141204854900000
1226 -r--r--r--. 1 root root  67 Sep 29 23:42 console-efi-141204855000000
1225 -r--r--r--. 1 root root 148 Sep 29 23:59 console-efi-141204954200000
1224 -r--r--r--. 1 root root  67 Sep 29 23:59 console-efi-141204954400000

Signed-off-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: stable@vger.kernel.org # 3.6+
Signed-off-by: Tony Luck <tony.luck@intel.com>

parent bfe01a5b

fs/pstore/inode.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -320,10 +320,10 @@ int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, int count,
		compressed ? ".enc.z" : "");
		break;
		case PSTORE_TYPE_CONSOLE:
		sprintf(name, "console-%s", psname);
		sprintf(name, "console-%s-%lld", psname, id);
		break;
		case PSTORE_TYPE_FTRACE:
		sprintf(name, "ftrace-%s", psname);
		sprintf(name, "ftrace-%s-%lld", psname, id);
		break;
		case PSTORE_TYPE_MCE:
		sprintf(name, "mce-%s-%lld", psname, id);

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