On Mon 2009-04-13 21:32:48, Adrian McMenamin wrote: > I know this still has issues that others have raised but I wanted to > post a version before the end of the long weekend... > > As before - some documentation about the filesystem: > http://mc.pp.se/dc/vms/flashmem.html > > A shell filesystem (eg for mount over loopback) available here: > http://newgolddream.dyndns.info/pristine > > A few people commented that this is a bit long for a single file - but > it is comparable to other files in the filesystem hierarchy - comments > welcome. > > The filesystem is hardware independent but is also written on the basis > that this is most likely to be used with a Dreamcast VMU - though it may > be of more use to emulator writers in the end. > > fs/Kconfig | 1 + > fs/Makefile | 1 + > fs/vmufat/Kconfig | 14 + > fs/vmufat/Makefile | 7 + > fs/vmufat/inode.c | 1362 ++++++++++++++++++++++++++++++++++++++++++++++++++++ > 5 files changed, 1385 insertions(+), 0 deletions(-) > > Signed-off-by: Adrian McMenamin <adrian@xxxxxxxxxxxxxxxxx> > --- > diff --git a/fs/Kconfig b/fs/Kconfig > index 9f7270f..b7cb23d 100644 > --- a/fs/Kconfig > +++ b/fs/Kconfig > @@ -176,6 +176,7 @@ source "fs/romfs/Kconfig" > source "fs/sysv/Kconfig" > source "fs/ufs/Kconfig" > source "fs/exofs/Kconfig" > +source "fs/vmufat/Kconfig" > > config NILFS2_FS > tristate "NILFS2 file system support (EXPERIMENTAL)" > diff --git a/fs/Makefile b/fs/Makefile > index af6d047..9d2d469 100644 > --- a/fs/Makefile > +++ b/fs/Makefile > @@ -124,3 +124,4 @@ obj-$(CONFIG_OCFS2_FS) += ocfs2/ > obj-$(CONFIG_BTRFS_FS) += btrfs/ > obj-$(CONFIG_GFS2_FS) += gfs2/ > obj-$(CONFIG_EXOFS_FS) += exofs/ > +obj-$(CONFIG_VMUFAT_FS) += vmufat/ > diff --git a/fs/vmufat/Kconfig b/fs/vmufat/Kconfig > new file mode 100644 > index 0000000..bdad4c6 > --- /dev/null > +++ b/fs/vmufat/Kconfig > @@ -0,0 +1,14 @@ > +config VMUFAT_FS > + tristate "Dreamcast VMU FAT filesystem" > + depends on BLOCK > + help > + This implements the simple FAT type filesystem found on SEGA > + Dreamcast visual memory units. > + > + Dreamcast users who want to mount their VMUs to view the native > + filesystem will say 'Y' here. The filesystem is hardware independent > + but is not recommended for any serious use in other circumstances, so > + just about everyone else should say 'N'. > + > + To compile this as a module say 'M' here. The module will be called > + vmufat "vmufat.ko." ? > +static unsigned long vmufat_save_bcd(char *bh, int z) > +{ > + unsigned char day, year, century, nl_day, month; > + unsigned char u8year; u8year? Should this be "u8 u8year"? > + unsigned long unix_date = CURRENT_TIME.tv_sec; > + > + day = unix_date / 86400 - 3652; > + year = day / 365; > + > + if ((year + 3) / 4 + 365 * year > day) > + year--; > + > + day -= (year + 3) / 4 + 365 * year; > + if (day == 59 && !(year & 3)) { > + nl_day = day; > + month = 2; > + } else { > + nl_day = (year & 3) || day <= 59 ? day : day - 1; > + for (month = 0; month < 12; month++) > + if (day_n[month] > nl_day) > + break; > + } > + > + century = 19; > + if (year > 19) > + century = 20; > + > + bh[z + 0x10] = bin2bcd(century); > + u8year = year + 80; > + if (u8year > 99) > + u8year = u8year - 100; It would be nice to document when this stops working. > + bh[z + 0x11] = bin2bcd(u8year); > + bh[z + 0x12] = bin2bcd(month); > + bh[z + 0x13] = > + bin2bcd(day - day_n[month - 1] + 1); > + bh[z + 0x14] = > + bin2bcd((unix_date / 3600) % 24); > + bh[z + 0x15] = bin2bcd((unix_date / 60) % 60); > + bh[z + 0x16] = bin2bcd(unix_date % 60); > + return unix_date; > +} -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
