isofs: implement dmode option

Implement dmode option for iso9660 filesystem to allow setting of access
rights for directories on the filesystem.

Signed-off-by: Jan Kara <jack@suse.cz>
Cc: "Ilya N. Golubev" <gin@mo.msk.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 17 insertions, 9 deletions

diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index 875d37f..c3240b4 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -144,7 +144,8 @@ struct iso9660_options{
 	char nocompress;
 	unsigned char check;
 	unsigned int blocksize;
-	mode_t mode;
+	mode_t fmode;
+	mode_t dmode;
 	gid_t gid;
 	uid_t uid;
 	char *iocharset;
@@ -305,7 +306,7 @@ enum {
 	Opt_block, Opt_check_r, Opt_check_s, Opt_cruft, Opt_gid, Opt_ignore,
 	Opt_iocharset, Opt_map_a, Opt_map_n, Opt_map_o, Opt_mode, Opt_nojoliet,
 	Opt_norock, Opt_sb, Opt_session, Opt_uid, Opt_unhide, Opt_utf8, Opt_err,
-	Opt_nocompress, Opt_hide, Opt_showassoc,
+	Opt_nocompress, Opt_hide, Opt_showassoc, Opt_dmode,
 };
 
 static match_table_t tokens = {
@@ -332,6 +333,7 @@ static match_table_t tokens = {
 	{Opt_uid, "uid=%u"},
 	{Opt_gid, "gid=%u"},
 	{Opt_mode, "mode=%u"},
+	{Opt_dmode, "dmode=%u"},
 	{Opt_block, "block=%u"},
 	{Opt_ignore, "conv=binary"},
 	{Opt_ignore, "conv=b"},
@@ -359,7 +361,7 @@ static int parse_options(char *options, struct iso9660_options *popt)
 	popt->check = 'u';		/* unset */
 	popt->nocompress = 0;
 	popt->blocksize = 1024;
-	popt->mode = S_IRUGO | S_IXUGO; /*
+	popt->fmode = popt->dmode = S_IRUGO | S_IXUGO; /*
 					 * r-x for all.  The disc could
 					 * be shared with DOS machines so
 					 * virtually anything could be
@@ -451,7 +453,12 @@ static int parse_options(char *options, struct iso9660_options *popt)
 		case Opt_mode:
 			if (match_int(&args[0], &option))
 				return 0;
-			popt->mode = option;
+			popt->fmode = option;
+			break;
+		case Opt_dmode:
+			if (match_int(&args[0], &option))
+				return 0;
+			popt->dmode = option;
 			break;
 		case Opt_block:
 			if (match_int(&args[0], &option))
@@ -801,7 +808,8 @@ root_found:
 	 * on the disk as suid, so we merely allow them to set the default
 	 * permissions.
 	 */
-	sbi->s_mode = opt.mode & 0777;
+	sbi->s_fmode = opt.fmode & 0777;
+	sbi->s_dmode = opt.dmode & 0777;
 
 	/*
 	 * Read the root inode, which _may_ result in changing
@@ -1248,7 +1256,7 @@ static int isofs_read_inode(struct inode *inode)
 	ei->i_file_format = isofs_file_normal;
 
 	if (de->flags[-high_sierra] & 2) {
-		inode->i_mode = S_IRUGO | S_IXUGO | S_IFDIR;
+		inode->i_mode = sbi->s_dmode | S_IFDIR;
 		inode->i_nlink = 1;	/*
 					 * Set to 1.  We know there are 2, but
 					 * the find utility tries to optimize
@@ -1258,9 +1266,8 @@ static int isofs_read_inode(struct inode *inode)
 					 */
 	} else {
 		/* Everybody gets to read the file. */
-		inode->i_mode = sbi->s_mode;
+		inode->i_mode = sbi->s_fmode | S_IFREG;
 		inode->i_nlink = 1;
-		inode->i_mode |= S_IFREG;
 	}
 	inode->i_uid = sbi->s_uid;
 	inode->i_gid = sbi->s_gid;
diff --git a/fs/isofs/isofs.h b/fs/isofs/isofs.h
index f3213f9..d1bdf8ad 100644
--- a/fs/isofs/isofs.h
+++ b/fs/isofs/isofs.h
@@ -51,7 +51,8 @@ struct isofs_sb_info {
 	unsigned char s_hide;
 	unsigned char s_showassoc;
 
-	mode_t s_mode;
+	mode_t s_fmode;
+	mode_t s_dmode;
 	gid_t s_gid;
 	uid_t s_uid;
 	struct nls_table *s_nls_iocharset; /* Native language support table */