Commit f68e542f authored Apr 12, 2011 by OGAWA Hirofumi

fat: Fix statfs->f_namelen

pathconf(, _PC_NAME_MAX) is too small for long Unicode filename on fat.

255 as max filename size on fat is Unicode UTF-16 characters.
it's not byte size.

https://bugzilla.kernel.org/show_bug.cgi?id=16469



To fix it, this returns "len * NLS_MAX_CHARSET_SIZE" instead.

Reported-by: Takumi Asaki <takumi.asaki@nokia.com>
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>

parent 869f58c0

fs/fat/inode.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -581,7 +581,8 @@ static int fat_statfs(struct dentry dentry, struct kstatfs buf)
		buf->f_bavail = sbi->free_clusters;
		buf->f_fsid.val[0] = (u32)id;
		buf->f_fsid.val[1] = (u32)(id >> 32);
		buf->f_namelen = sbi->options.isvfat ? FAT_LFN_LEN : 12;
		buf->f_namelen =
		(sbi->options.isvfat ? FAT_LFN_LEN : 12) * NLS_MAX_CHARSET_SIZE;

		return 0;
		}

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