Raaf
2007-Jul-01 19:51 UTC
Cannot mount Sony Ericsson mobile phone, msdosfs too restrictive?
Hi, i got a Sony Ericsson mobile phone that came with a pre-formatted
memory stick that i'm unable to mount in FreeBSD (it mounts fine in
Linux).
After investigating i found out that the FreeBSD msdsofs driver bails
out on the following code (the pmp->pm_Heads being zero):
----------------------------------
if (!pmp->pm_BytesPerSec || !SecPerClust
|| !pmp->pm_Heads
#ifdef PC98
|| !pmp->pm_SecPerTrack || pmp->pm_SecPerTrack > 255) {
#else
|| !pmp->pm_SecPerTrack || pmp->pm_SecPerTrack > 63) {
#endif
error = EINVAL;
goto error_exit;
}
----------------------------------
Removing the check for pmp->pm_Heads fixes it for me.
Is the check for pmp->pm_Heads really necessary?
Grepping through the msdosfs sources i can only see it being used for
validation and not used in any calculation (the same applies for the
pmp->pm_SecPerTrack value)
--- sys/fs/msdosfs/msdosfs_vfsops.c.orig Sun Jul 1 20:42:14 2007
+++ sys/fs/msdosfs/msdosfs_vfsops.c Sun Jul 1 20:46:57 2007
@@ -483,7 +483,6 @@
/* XXX - We should probably check more values here */
if (!pmp->pm_BytesPerSec || !SecPerClust
- || !pmp->pm_Heads
#ifdef PC98
|| !pmp->pm_SecPerTrack || pmp->pm_SecPerTrack > 255) {
#else
Dennis Melentyev
2007-Jul-01 20:05 UTC
Cannot mount Sony Ericsson mobile phone, msdosfs too restrictive?
Well, had the same problem. For me, it looks like SE is using FAT12 (!!!Not 16!!!) on a devive larger than 32MB. Could have something slipped off my mind, but quite close. It is a BROKEN msdosfs on a stick. Just re-formated 1Gb flash with FAT32 using card reader and both K750i and FreeBSD are happy. 2007/7/1, Raaf <raaf@zen.mooo.com>:> Hi, i got a Sony Ericsson mobile phone that came with a pre-formatted > memory stick that i'm unable to mount in FreeBSD (it mounts fine in > Linux). > > After investigating i found out that the FreeBSD msdsofs driver bails > out on the following code (the pmp->pm_Heads being zero): > > ---------------------------------- > if (!pmp->pm_BytesPerSec || !SecPerClust > || !pmp->pm_Heads > #ifdef PC98 > || !pmp->pm_SecPerTrack || pmp->pm_SecPerTrack > 255) { > #else > || !pmp->pm_SecPerTrack || pmp->pm_SecPerTrack > 63) { > #endif > error = EINVAL; > goto error_exit; > } > ---------------------------------- > > Removing the check for pmp->pm_Heads fixes it for me. > > Is the check for pmp->pm_Heads really necessary? > > Grepping through the msdosfs sources i can only see it being used for > validation and not used in any calculation (the same applies for the > pmp->pm_SecPerTrack value) > > > --- sys/fs/msdosfs/msdosfs_vfsops.c.orig Sun Jul 1 20:42:14 2007 > +++ sys/fs/msdosfs/msdosfs_vfsops.c Sun Jul 1 20:46:57 2007 > @@ -483,7 +483,6 @@ > > /* XXX - We should probably check more values here */ > if (!pmp->pm_BytesPerSec || !SecPerClust > - || !pmp->pm_Heads > #ifdef PC98 > || !pmp->pm_SecPerTrack || pmp->pm_SecPerTrack > 255) { > #else > > > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" >-- Dennis Melentyev