[U-Boot] [PATCH v2 3/3] fastboot: Check if partition really exist in getvar_has_slot()
Lukasz Majewski
lukma at denx.de
Thu Jun 13 05:47:19 UTC 2019
Hi Sam,
> Hi Tom,
>
> We have broken fastboot right now... Can we please apply this series,
> so that it appears in v2019.07?
I'm running Travis-CI on this series, and send PR to Marek when it
finish.
Thanks for fixing fastboot.
>
> Thanks!
>
> On Thu, Jun 13, 2019 at 12:14 AM Sam Protsenko
> <semen.protsenko at linaro.org> wrote:
> >
> > From: Igor Opaniuk <igor.opaniuk at toradex.com>
> >
> > Currently getvar_has_slot() invocation for "boot" and "system"
> > partitions always returns affirmative response regardless the fact
> > of existence of these partitions, which leads to impossibility to
> > flash them on old non-A/B AOSP setups, where _a/_b suffixes aren't
> > used:
> >
> > $ fastboot flash boot boot.img
> > Sending 'boot__a' (11301 KB) OKAY [ 0.451s]
> > Writing 'boot__a' FAILED (remote: 'cannot find
> > partition') fastboot: error: Command failed
> >
> > Although partition layout is:
> > -> part list mmc 0
> > Partition Map for MMC device 0 -- Partition Type: EFI
> >
> > Part Start LBA End LBA Name
> > Attributes
> > Type GUID
> > Partition GUID
> > 1 0x00000800 0x000107ff "boot"
> > attrs: 0x0000000000000000
> > type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
> > guid: ea2e2470-db4a-d646-b828-10167f736d63
> > 2 0x00010800 0x000127ff "environment"
> > attrs: 0x0000000000000000
> > type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
> > guid: 10a819d2-6004-3d48-bd87-114e2a796db9
> > 3 0x00012800 0x0001a7ff "recovery"
> > attrs: 0x0000000000000000
> > type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
> > guid: 9ea116e4-8a34-0c48-8cf5-2fe9480f56cd
> > 4 0x0001a800 0x0031a7ff "system"
> > attrs: 0x0000000000000000
> > ......
> >
> > This patch adds checks of existence for requested partitions
> > on eMMC/NAND.
> >
> > Signed-off-by: Igor Opaniuk <igor.opaniuk at toradex.com>
> > Signed-off-by: Sam Protsenko <semen.protsenko at linaro.org>
> > ---
> > drivers/fastboot/fb_getvar.c | 26 ++++++++++++++++++++++----
> > 1 file changed, 22 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/fastboot/fb_getvar.c
> > b/drivers/fastboot/fb_getvar.c index b23880089e..563bda0088 100644
> > --- a/drivers/fastboot/fb_getvar.c
> > +++ b/drivers/fastboot/fb_getvar.c
> > @@ -179,11 +179,29 @@ static void getvar_slot_suffixes(char
> > *var_parameter, char *response)
> >
> > static void getvar_has_slot(char *part_name, char *response)
> > {
> > - if (part_name && (!strcmp(part_name, "boot") ||
> > - !strcmp(part_name, "system")))
> > + char part_name_wslot[PART_NAME_LEN];
> > + size_t len;
> > + int r;
> > +
> > + if (!part_name)
> > + goto no;
> > +
> > + /* Append "_a" prefix to part_name */
> > + len = strlcpy(part_name_wslot, part_name, PART_NAME_LEN -
> > 3);
> > + if (len > PART_NAME_LEN - 3) {
> > + fastboot_fail("too long partition name", response);
> > + return;
> > + }
> > + strcat(part_name_wslot, "_a");
> > +
> > + /* Check if this partition exists */
> > + r = getvar_get_part_info(part_name_wslot, response, NULL);
> > + if (r >= 0) {
> > fastboot_okay("yes", response);
> > - else
> > - fastboot_okay("no", response);
> > + return;
> > + }
> > +no:
> > + fastboot_okay("no", response);
> > }
> >
> > #if CONFIG_IS_ENABLED(FASTBOOT_FLASH_MMC)
> > --
> > 2.20.1
> >
> _______________________________________________
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Best regards,
Lukasz Majewski
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma at denx.de
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