udf: implement mode and dmode mounting options

"dmode" allows overriding permissions of directories and
"mode" allows overriding permissions of files.

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Jan Kara <jack@suse.cz>

diff --git a/Documentation/filesystems/udf.txt b/Documentation/filesystems/udf.txt
index fde829a..902b95d 100644 (file)
--- a/Documentation/filesystems/udf.txt
+++ b/Documentation/filesystems/udf.txt
@@ -24,6 +24,8 @@ The following mount options are supported:
 
        gid=            Set the default group.
        umask=          Set the default umask.
+       mode=           Set the default file permissions.
+       dmode=          Set the default directory permissions.
        uid=            Set the default user.
        bs=             Set the block size.
        unhide          Show otherwise hidden files.

diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 3c98c30..1456d23 100644 (file)
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -1222,8 +1222,15 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
        inode->i_size = le64_to_cpu(fe->informationLength);
        iinfo->i_lenExtents = inode->i_size;
 
-       inode->i_mode = udf_convert_permissions(fe);
-       inode->i_mode &= ~UDF_SB(inode->i_sb)->s_umask;
+       if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY &&
+                       sbi->s_fmode != -1)
+               inode->i_mode = sbi->s_fmode;
+       else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY &&
+                       sbi->s_dmode != -1)
+               inode->i_mode = sbi->s_dmode;
+       else
+               inode->i_mode = udf_convert_permissions(fe);
+       inode->i_mode &= ~sbi->s_umask;
 
        if (iinfo->i_efe == 0) {
                inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<

diff --git a/fs/udf/super.c b/fs/udf/super.c
index 8364b17..98d5455 100644 (file)
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -201,6 +201,8 @@ struct udf_options {
        mode_t umask;
        gid_t gid;
        uid_t uid;
+       mode_t fmode;
+       mode_t dmode;
        struct nls_table *nls_map;
 };
 
@@ -282,6 +284,10 @@ static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt)
                seq_printf(seq, ",gid=%u", sbi->s_gid);
        if (sbi->s_umask != 0)
                seq_printf(seq, ",umask=%o", sbi->s_umask);
+       if (sbi->s_fmode != -1)
+               seq_printf(seq, ",mode=%o", sbi->s_fmode);
+       if (sbi->s_dmode != -1)
+               seq_printf(seq, ",dmode=%o", sbi->s_dmode);
        if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
                seq_printf(seq, ",session=%u", sbi->s_session);
        if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
@@ -317,6 +323,8 @@ static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt)
  *
  *     gid=            Set the default group.
  *     umask=          Set the default umask.
+ *     mode=           Set the default file permissions.
+ *     dmode=          Set the default directory permissions.
  *     uid=            Set the default user.
  *     bs=             Set the block size.
  *     unhide          Show otherwise hidden files.
@@ -366,7 +374,8 @@ enum {
        Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
        Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
        Opt_rootdir, Opt_utf8, Opt_iocharset,
-       Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore
+       Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
+       Opt_fmode, Opt_dmode
 };
 
 static const match_table_t tokens = {
@@ -395,6 +404,8 @@ static const match_table_t tokens = {
        {Opt_rootdir,   "rootdir=%u"},
        {Opt_utf8,      "utf8"},
        {Opt_iocharset, "iocharset=%s"},
+       {Opt_fmode,     "mode=%o"},
+       {Opt_dmode,     "dmode=%o"},
        {Opt_err,       NULL}
 };
 
@@ -531,6 +542,16 @@ static int udf_parse_options(char *options, struct udf_options *uopt,
                case Opt_gforget:
                        uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
                        break;
+               case Opt_fmode:
+                       if (match_octal(args, &option))
+                               return 0;
+                       uopt->fmode = option & 0777;
+                       break;
+               case Opt_dmode:
+                       if (match_octal(args, &option))
+                               return 0;
+                       uopt->dmode = option & 0777;
+                       break;
                default:
                        printk(KERN_ERR "udf: bad mount option \"%s\" "
                               "or missing value\n", p);
@@ -560,6 +581,8 @@ static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
        uopt.uid   = sbi->s_uid;
        uopt.gid   = sbi->s_gid;
        uopt.umask = sbi->s_umask;
+       uopt.fmode = sbi->s_fmode;
+       uopt.dmode = sbi->s_dmode;
 
        if (!udf_parse_options(options, &uopt, true))
                return -EINVAL;
@@ -568,6 +591,8 @@ static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
        sbi->s_uid   = uopt.uid;
        sbi->s_gid   = uopt.gid;
        sbi->s_umask = uopt.umask;
+       sbi->s_fmode = uopt.fmode;
+       sbi->s_dmode = uopt.dmode;
 
        if (sbi->s_lvid_bh) {
                int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
@@ -1869,6 +1894,8 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
        uopt.uid = -1;
        uopt.gid = -1;
        uopt.umask = 0;
+       uopt.fmode = -1;
+       uopt.dmode = -1;
 
        sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
        if (!sbi)
@@ -1906,6 +1933,8 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
        sbi->s_uid = uopt.uid;
        sbi->s_gid = uopt.gid;
        sbi->s_umask = uopt.umask;
+       sbi->s_fmode = uopt.fmode;
+       sbi->s_dmode = uopt.dmode;
        sbi->s_nls_map = uopt.nls_map;
 
        /* Set the block size for all transfers */

diff --git a/fs/udf/udf_sb.h b/fs/udf/udf_sb.h
index 1c1c514..5d32c60 100644 (file)
--- a/fs/udf/udf_sb.h
+++ b/fs/udf/udf_sb.h
@@ -123,6 +123,8 @@ struct udf_sb_info {
        mode_t                  s_umask;
        gid_t                   s_gid;
        uid_t                   s_uid;
+       mode_t                  s_fmode;
+       mode_t                  s_dmode;
 
        /* Root Info */
        struct timespec         s_record_time;