adfs: add hexadecimal filetype suffix option
ADFS (FileCore) storage complies with the RISC OS filetype specification
(12 bits of file type information is stored in the file load address,
rather than using a file extension). The existing driver largely ignores
this information and does not present it to the end user.
It is desirable that stored filetypes be made visible to the end user to
facilitate a precise copy of data and metadata from a hard disc (or image
thereof) into a RISC OS emulator (such as RPCEmu) or to a network share
which can be accessed by real Acorn systems.
This patch implements a per-mount filetype suffix option (use -o
ftsuffix=1) to present any filetype as a ,xyz hexadecimal suffix on each
file. This type suffix is compatible with that used by RISC OS systems
that access network servers using NFS client software and by RPCemu's host
filing system.
Signed-off-by: Stuart Swales <stuart.swales.croftnuisk@gmail.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index 06d7388..c8bf36a 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -138,17 +138,20 @@
seq_printf(seq, ",ownmask=%o", asb->s_owner_mask);
if (asb->s_other_mask != ADFS_DEFAULT_OTHER_MASK)
seq_printf(seq, ",othmask=%o", asb->s_other_mask);
+ if (asb->s_ftsuffix != 0)
+ seq_printf(seq, ",ftsuffix=%u", asb->s_ftsuffix);
return 0;
}
-enum {Opt_uid, Opt_gid, Opt_ownmask, Opt_othmask, Opt_err};
+enum {Opt_uid, Opt_gid, Opt_ownmask, Opt_othmask, Opt_ftsuffix, Opt_err};
static const match_table_t tokens = {
{Opt_uid, "uid=%u"},
{Opt_gid, "gid=%u"},
{Opt_ownmask, "ownmask=%o"},
{Opt_othmask, "othmask=%o"},
+ {Opt_ftsuffix, "ftsuffix=%u"},
{Opt_err, NULL}
};
@@ -189,6 +192,11 @@
return -EINVAL;
asb->s_other_mask = option;
break;
+ case Opt_ftsuffix:
+ if (match_int(args, &option))
+ return -EINVAL;
+ asb->s_ftsuffix = option;
+ break;
default:
printk("ADFS-fs: unrecognised mount option \"%s\" "
"or missing value\n", p);
@@ -366,6 +374,7 @@
asb->s_gid = 0;
asb->s_owner_mask = ADFS_DEFAULT_OWNER_MASK;
asb->s_other_mask = ADFS_DEFAULT_OTHER_MASK;
+ asb->s_ftsuffix = 0;
if (parse_options(sb, data))
goto error;
@@ -445,11 +454,13 @@
root_obj.parent_id = root_obj.file_id = le32_to_cpu(dr->root);
root_obj.name_len = 0;
- root_obj.loadaddr = 0;
- root_obj.execaddr = 0;
+ /* Set root object date as 01 Jan 1987 00:00:00 */
+ root_obj.loadaddr = 0xfff0003f;
+ root_obj.execaddr = 0xec22c000;
root_obj.size = ADFS_NEWDIR_SIZE;
root_obj.attr = ADFS_NDA_DIRECTORY | ADFS_NDA_OWNER_READ |
ADFS_NDA_OWNER_WRITE | ADFS_NDA_PUBLIC_READ;
+ root_obj.filetype = -1;
/*
* If this is a F+ disk with variable length directories,
@@ -463,6 +474,12 @@
asb->s_dir = &adfs_f_dir_ops;
asb->s_namelen = ADFS_F_NAME_LEN;
}
+ /*
+ * ,xyz hex filetype suffix may be added by driver
+ * to files that have valid RISC OS filetype
+ */
+ if (asb->s_ftsuffix)
+ asb->s_namelen += 4;
sb->s_d_op = &adfs_dentry_operations;
root = adfs_iget(sb, &root_obj);