From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Date: Fri, 31 Mar 2006 10:30:53 +0000 (-0800)
Subject: [PATCH] fat: kill reserved names
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=094e320d761dae5816d8faa695b0509eea79c108;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[PATCH] fat: kill reserved names

Since these names on old MSDOS is used as device, so, current fat driver
doesn't allow a user to create those names.  But many OSes and even Windows
can create those names actually, now.

This patch removes the reserved name check.

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/fs/msdos/namei.c b/fs/msdos/namei.c
index 626a367bcd81..5b76ccd19e3f 100644
--- a/fs/msdos/namei.c
+++ b/fs/msdos/namei.c
@@ -12,14 +12,6 @@
 #include <linux/msdos_fs.h>
 #include <linux/smp_lock.h>
 
-/* MS-DOS "device special files" */
-static const unsigned char *reserved_names[] = {
-	"CON     ", "PRN     ", "NUL     ", "AUX     ",
-	"LPT1    ", "LPT2    ", "LPT3    ", "LPT4    ",
-	"COM1    ", "COM2    ", "COM3    ", "COM4    ",
-	NULL
-};
-
 /* Characters that are undesirable in an MS-DOS file name */
 static unsigned char bad_chars[] = "*?<>|\"";
 static unsigned char bad_if_strict_pc[] = "+=,; ";
@@ -40,7 +32,6 @@ static int msdos_format_name(const unsigned char *name, int len,
 	 */
 {
 	unsigned char *walk;
-	const unsigned char **reserved;
 	unsigned char c;
 	int space;
 
@@ -127,11 +118,7 @@ static int msdos_format_name(const unsigned char *name, int len,
 	}
 	while (walk - res < MSDOS_NAME)
 		*walk++ = ' ';
-	if (!opts->atari)
-		/* GEMDOS is less stupid and has no reserved names */
-		for (reserved = reserved_names; *reserved; reserved++)
-			if (!strncmp(res, *reserved, 8))
-				return -EINVAL;
+
 	return 0;
 }
 
diff --git a/fs/vfat/namei.c b/fs/vfat/namei.c
index ef46939c0c1a..a56cec3be5f0 100644
--- a/fs/vfat/namei.c
+++ b/fs/vfat/namei.c
@@ -185,24 +185,6 @@ static int vfat_valid_longname(const unsigned char *name, unsigned int len)
 		return -EINVAL;
 	if (len >= 256)
 		return -ENAMETOOLONG;
-
-	/* MS-DOS "device special files" */
-	if (len == 3 || (len > 3 && name[3] == '.')) {	/* basename == 3 */
-		if (!strnicmp(name, "aux", 3) ||
-		    !strnicmp(name, "con", 3) ||
-		    !strnicmp(name, "nul", 3) ||
-		    !strnicmp(name, "prn", 3))
-			return -EINVAL;
-	}
-	if (len == 4 || (len > 4 && name[4] == '.')) {	/* basename == 4 */
-		/* "com1", "com2", ... */
-		if ('1' <= name[3] && name[3] <= '9') {
-			if (!strnicmp(name, "com", 3) ||
-			    !strnicmp(name, "lpt", 3))
-				return -EINVAL;
-		}
-	}
-
 	return 0;
 }