Hi Josua Mayer, Partname is nothing but respective partition name of emmc card. It reads partition name from GPT partition table. I think fdisk may not be able to write partition name in GPT table, but you should be able to create the partition name with GPT fdisk (consisting of the gdisk, cgdisk, sgdisk, and fixparts programs).
Thanks, Ram -----Original Message----- From: Josua Mayer [mailto:josua.maye...@gmail.com] Sent: Wednesday, May 04, 2016 6:13 PM To: Ram Chandra Jangir <rja...@codeaurora.org>; openwrt-devel@lists.openwrt.org Subject: Re: [OpenWrt-Devel] [PATCH v2 2/3] ext4_part_match: fix bug that prevented matching names Hi Ram, Thanks for your comments. Now it appears I misunderstood what the code is supposed to match. So if there is a PARTNAME= line, it can be matched. However on my system I dont have PARTNAME. Here a real-life sample: root@OpenWrt:/# cat /sys/block/mmcblk0/mmcblk0p3/uevent MAJOR=179 MINOR=3 DEVNAME=mmcblk0p3 DEVTYPE=partition <end> What is partname and how can I set it? fdisk? filesystem label? br Josua Mayer Am 29.04.2016 um 14:35 schrieb Ram Chandra Jangir: > Thanks Josua Mayer. > > Devname and partname both are different. Devname is holding the device > node(ex. mmcblkXpY) and given name(or partname) is the partition name(ex. > rootfs or rootfs_data). > For below uevent sysfs entries, it tries to populate the device > node(mmcblkXpY) in devname variable and tries to match the given name with > the PARTNAME(buf will have this value("PARTNAME=rootfs_data") at n'th > iteration). > If it is found then the loop will break, and we will get the given name's > device node(/dev/mmcblkXpY) which will be mounted later. > > Example: > root@OpenWrt:/# cat /sys/block/mmcblk0/mmcblk0p3/uevent > MAJOR=179 > MINOR=3 > DEVNAME=mmcblk0p3 <-- device node: /dev/mmcblk0p3 > DEVTYPE=partition > PARTN=3 > PARTNAME=rootfs_data > > This is required, because the emmc card may have multiple partitions too. So > our aim is to get the device node from the given name's uevent file. > > Thanks, > Ram > > -----Original Message----- > From: openwrt-devel [mailto:openwrt-devel-boun...@lists.openwrt.org] > On Behalf Of josua.maye...@gmail.com > Sent: Thursday, April 28, 2016 11:50 PM > To: openwrt-devel@lists.openwrt.org > Cc: Josua Mayer <privacy@not.given> > Subject: [OpenWrt-Devel] [PATCH v2 2/3] ext4_part_match: fix bug that > prevented matching names > > From: Josua Mayer <privacy@not.given> > > Actually use the populated devname variable to compare against given name, > instead of the buf variable, which incidentally contains either: > MAJOR=xyz, MINOR=x, or DEVTYPE=partition, none of which ever match a name. > > Signed-off-by: Josua Mayer <josua.maye...@gmail.com> > --- > libfstools/ext4.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/libfstools/ext4.c b/libfstools/ext4.c index > f648aa8..b9401c3 100644 > --- a/libfstools/ext4.c > +++ b/libfstools/ext4.c > @@ -78,7 +78,7 @@ ext4_part_match(char *dev, char *name, char *filename) > continue; > } > /* Match partition name */ > - if (strstr(buf, name)) { > + if (strstr(devname, name)) { > ret = 0; > break; > } > -- > 2.6.6 > _______________________________________________ > openwrt-devel mailing list > openwrt-devel@lists.openwrt.org > https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel > _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
