search for: partition_type_guid

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

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

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

...t bootable, int partition_id, unsigned char *); +static void create_gpt_partition_header (const void *pt, int is_primary, unsigned char *out); +static void create_gpt_partition_table (unsigned char *out); +static void create_gpt_partition_table_entry (const struct region *region, int bootable, char partition_type_guid[16], unsigned char *out); +static void create_gpt_protective_mbr (unsigned char *out); + +static int +create_partition_table (void) +{ + /* The caller has already create the disk layout and allocated space + * in memory for the partition table. + */ + assert (nr_regions > 0); + assert (pr...

...nclude <string.h> +#include <unistd.h> + +#include <nbdkit-plugin.h> + +#include "efi-crc32.h" +#include "gpt.h" +#include "isaligned.h" +#include "rounding.h" +#include "regions.h" + +#include "virtual-disk.h" + +#define PARTITION_TYPE_GUID "0FC63DAF-8483-4772-8E79-3D69D8477DE4" + +static void create_gpt_protective_mbr (struct virtual_disk *disk, + unsigned char *out); +static void create_gpt_partition_header (struct virtual_disk *disk, + const voi...

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.

...partition"; + longdesc = "\ +Set the type GUID of numbered GPT partition C<partnum> to C<guid>. Return an +error if the partition table of C<device> isn't GPT, or if C<guid> is not a +valid GUID. + +See L<http://en.wikipedia.org/wiki/GUID_Partition_Table#Partition_type_GUIDs> +for a useful list of type GUIDs." }; + + { defaults with + name = "part_get_gpt_type"; + style = RString "guid", [Device "device"; Int "partnum"], []; + proc_nr = Some 393; + tests = [ + InitGPT, Always, TestOutput ( + [[&q...

...added = (1, 17, 19); @@ -8232,7 +8232,7 @@ Set the type GUID of numbered GPT partition C<partnum> to C<guid>. Return an error if the partition table of C<device> isn't GPT, or if C<guid> is not a valid GUID. -See L<http://en.wikipedia.org/wiki/GUID_Partition_Table#Partition_type_GUIDs> +See L<https://en.wikipedia.org/wiki/GUID_Partition_Table#Partition_type_GUIDs> for a useful list of type GUIDs." }; { defaults with @@ -8624,7 +8624,7 @@ This function is used internally when testing the appliance." }; Copy the attributes of a path (which can be a file...

...nclude <string.h> +#include <unistd.h> + +#include <nbdkit-plugin.h> + +#include "efi-crc32.h" +#include "gpt.h" +#include "isaligned.h" +#include "rounding.h" +#include "regions.h" + +#include "virtual-disk.h" + +#define PARTITION_TYPE_GUID "0FC63DAF-8483-4772-8E79-3D69D8477DE4" + +static void create_gpt_protective_mbr (struct virtual_disk *disk, + unsigned char *out); +static void create_gpt_partition_header (struct virtual_disk *disk, + const voi...

...ble_lba; + char guid[16]; + uint64_t partition_entries_lba; + uint32_t nr_partition_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 plu...

...prepare call above. */ if (next_ops->pread (nxdata, partition_bytes, sizeof partition_bytes, - 2*512 + i*128) == -1) + 2*512 + i*128)) return -1; get_gpt_partition (partition_bytes, &partition); if (memcmp (partition.partition_type_guid, -- 2.14.3

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

Here's what I'm currently playing with; I'm not ready to commit anything until I rebase my FUA work on top of this, as I only want to break filter ABI once between releases. Eric Blake (2): backend: Rework internal/filter error return semantics filters: Add log filter TODO | 2 - docs/nbdkit-filter.pod | 84 +++++++-- docs/nbdkit.pod

EFI systems typically don't support booting off ISO 9660 filesystems, even if written to USB sticks. This patch adds support for generating a GPT that covers the stick as well, with an additional partition entry pointing purely at the secondary El Torito image. When burned to CD the secondary El Torito will be used as an EFI boot image, and when written to a USB stick the GPT partition

Since v1: add the blocksize filter, add testsuite coverage of the log filter, several fixes to the log filter based on what adding tests revealed I'm still working on FUA flag support patches on top of this; the patches should all be committed in the same release, as we want to minimize the number of releases that cause a filter ABI/API bump Eric Blake (3): backend: Rework internal/filter

After more than a month since v2 [1], I've finally got my FUA support series polished. This is all of my outstanding patches, even though some of them were originally posted in separate threads from the original FUA post [2], [3] [1] https://www.redhat.com/archives/libguestfs/2018-January/msg00113.html [2] https://www.redhat.com/archives/libguestfs/2018-January/msg00219.html [3]

Split up the huge generator/actions.ml into several smaller files. Rich.

The existing mechanism was clunky, slow and used ~ 10 MB of local disk. Rich.