search for: last_lba

This implements support for MBR logical partitions in nbdkit-partition-filter, complementing existing support in the partitioning plugin. Rich.

...r.bz2 This release adds a interesting functionality : it can now read partitions tables from regular files, automagically assign a loop device (like the mount cmd), and map devmaps from here. Example : here, /tmp/test is a dump of an USB key root@zezette../kpartx-0.0.2$ ./kpartx -a -v /tmp/test last_lba(): I don't know how to handle files with mode 81a4 gpt: 0 slices dos: 6 slices reduced size of partition #2 to 32 Added loop0p1 : 0 15968 /dev/loop0 32 Added loop0p2 : 0 32 /dev/loop0 16000 Added loop0p5 : 0 6432 /dev/loop0 16032 Added loop0p6 : 0 9504 /dev/loop0 22496 root@zezette../kpartx-0....

For v3 I reimplemented this using mke2fs -d. This obviously makes the implementation a whole lot simpler, but cannot support multiple directory merging. Patches 1-3 are the same as before. I've also reproduced the notes from v2 below. v2: - Fix inconsistent tab/space. - All 3 plugins now contain a block of text pointing to the other 2 plugins. - TMDIR -> TMPDIR - Unlink the

Another interesting thing you can do with this plugin: https://rwmj.wordpress.com/2019/02/19/nbdkit-linuxdisk-plugin/ v2: - Fix inconsistent tab/space. - All 3 plugins now contain a block of text pointing to the other 2 plugins. - TMDIR -> TMPDIR - Unlink the temporary file and other cleanups along error paths. - fclose -> pclose, and check the return value for errors. -

Turns out Japanese trains are good for coding! In supermin we have a bunch of code to create the libguestfs appliance. It creates it directly using libext2fs (part of e2fsprogs). We can use the same technique to create ext2 virtual disks in nbdkit, which is what this new plugin does. Why a new plugin instead of modifying the floppy plugin? See the 4/4 commit message for an explanation. The

Hi Folks, I search for a way to mount the .img files virt-install creates for Xen VMs. Using fdisk -lu I found it contains to 2 partitions: > # fdisk -lu /var/lib/xen/images/BaseCentos.img > last_lba(): I don't know how to handle files with mode 81ed > Sie m?ssen angeben Zylinder. > Sie k?nnen dies im Zusatzfunktionsmen? tun. > > Platte /var/lib/xen/images/BaseCentos.img: 0 MByte, 0 Byte > 255 heads, 63 sectors/track, 0 cylinders, zusammen 0 Sektoren > Einheiten = Sektoren...

...n_entries; + uint32_t size_partition_entry; + uint32_t crc_partitions; +}; + +#define GPT_SIGNATURE "EFI PART" +#define GPT_REVISION "\0\0\1\0" /* revision 1.0 */ + +struct gpt_entry { + char partition_type_guid[16]; + char unique_guid[16]; + uint64_t first_lba; + uint64_t last_lba; + uint64_t attributes; + char name[72]; /* UTF-16LE */ +}; + +/* GPT_MIN_PARTITIONS is the minimum number of partitions and is + * defined by the UEFI standard (assuming 512 byte sector size). + * + * In plugins such as the partitioning plugin, if we are requested to + * allocate...

This is still tentative and needs a lot of work, but: - partition filter works, supporting MBR & GPT - prepare and finalize methods fixed - open method can now be changed (allowing readonly flag to be modified) - thread_model can be limited I believe I made most of the changes which were previously suggested in email. I think the only one I didn't was preventing inclusion of both

...int bootable, char partition_type_guid[16], + unsigned char *out) +{ + size_t i, len; + const char *filename; + struct gpt_entry { + char partition_type_guid[16]; + char unique_guid[16]; + uint64_t first_lba; + uint64_t last_lba; + uint64_t attributes; + char name[72]; /* UTF-16LE */ + } *entry = (struct gpt_entry *) out; + + assert (sizeof (struct gpt_entry) == GPT_PT_ENTRY_SIZE); + + memcpy (entry->partition_type_guid, partition_type_guid, 16); + + memcpy (entry->unique_guid, files[region-&gt...

nbdkit partitioning boot.img swap.img root.img ... creates a virtual disk by adding a partition table. In ancient times Xen used to do this. Rich.

The partitioning plugin patch is the same (except for rebasing). However I have changed the first two patches based on feedback received. In particular this fixes a very serious bug found by Eric Blake in the current truncate filter. Rich.

...entry *entry = (struct gpt_entry *) out; + + assert (sizeof (struct gpt_entry) == GPT_PT_ENTRY_SIZE); + + memcpy (entry->partition_type_guid, partition_type_guid, 16); + memcpy (entry->unique_guid, guid, 16); + + entry->first_lba = htole64 (region->start / SECTOR_SIZE); + entry->last_lba = htole64 (region->end / SECTOR_SIZE); + entry->attributes = htole64 (bootable ? 4 : 0); +} + +static void +create_gpt_partition_table (struct virtual_disk *disk, unsigned char *out) +{ + size_t j; + + for (j = 0; j < nr_regions (&disk->regions); ++j) { + const struct region *...

...entry *entry = (struct gpt_entry *) out; + + assert (sizeof (struct gpt_entry) == GPT_PT_ENTRY_SIZE); + + memcpy (entry->partition_type_guid, partition_type_guid, 16); + memcpy (entry->unique_guid, guid, 16); + + entry->first_lba = htole64 (region->start / SECTOR_SIZE); + entry->last_lba = htole64 (region->end / SECTOR_SIZE); + entry->attributes = htole64 (bootable ? 4 : 0); +} + +static void +create_gpt_partition_table (struct virtual_disk *disk, unsigned char *out) +{ + size_t j; + + for (j = 0; j < nr_regions (&disk->regions); ++j) { + const struct region *...