Hi Ram, sorry for taking so long to reply. So you are right that with a gpt-partition table this feature should be straight forward. However GPT does not seem to be an option for many arm boards. And sadly with the old MBR table I know of no way to set partname.
br Josua Mayer Am 09.05.2016 um 13:15 schrieb Ram Chandra Jangir: > 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:[email protected]] > Sent: Wednesday, May 04, 2016 6:13 PM > To: Ram Chandra Jangir <[email protected]>; > [email protected] > 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:[email protected]] >> On Behalf Of [email protected] >> Sent: Thursday, April 28, 2016 11:50 PM >> To: [email protected] >> Cc: Josua Mayer <[email protected]> >> Subject: [OpenWrt-Devel] [PATCH v2 2/3] ext4_part_match: fix bug that >> prevented matching names >> >> From: Josua Mayer <[email protected]> >> >> 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 <[email protected]> >> --- >> 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 >> [email protected] >> https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel >> _______________________________________________ openwrt-devel mailing list [email protected] https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
