[dm-crypt] run cryptsetup-reencrypt failed

[Xiao Ni <xni@redhat.com>]

Hi

   I ran the command cryptsetup-reencrypt and it failed. I'll give the log as follows.

   I added some debug codes, and find it failed when write device. Then I modify the code when open device and it works well.
I don't know whether it's right to modify by this way. Could you help me to check this? 

       139 /* Get path to device / file */
    140 const char *device_path(const struct device *device)
    141 {
    142         if (!device)
    143                 return NULL;
    144 
    145         //if (device->file_path)
    146         //      return device->file_path;
    147 
    148         //return device->path;
    149         if (device->path)
    150                 return device->path;
    151 
    152         return device->file_path;
    153 
    154 }

   [root@storageqe-06 /]# ./cryptsetup-1.6.2/src/cryptsetup-reencrypt /dev/dm-10  --debug
WARNING: this is experimental code, it can completely break your data.
# cryptsetup 1.6.2 processing "/cryptsetup-1.6.2/src/.libs/lt-cryptsetup-reencrypt /dev/dm-10 --debug"
# Initialising reencryption context.
# Initialising UUID.
# Allocating crypt device /dev/dm-10 context.
# Trying to open and read device /dev/dm-10.
# Initialising device-mapper backend library.
# Trying to load LUKS1 crypt type from device /dev/dm-10.
# Crypto backend (gcrypt 1.5.3) initialized.
# Reading LUKS header of size 1024 from device /dev/dm-10
open device /dev/dm-10
# Key length 32, device size 10483712 sectors, header size 2050 sectors.
# Releasing crypt device /dev/dm-10 context.
# Releasing device-mapper backend.
# Removing headers.
# Allocating crypt device (null) context.
# Initialising device-mapper backend library.
# Deactivating volume LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.org.
# Detected kernel Linux 3.10.0-41.el7.x86_64 x86_64.
# dm version   OF   [16384] (*1)
# dm versions   OF   [16384] (*1)
# Detected dm-crypt version 1.12.1, dm-ioctl version 4.26.0.
# Device-mapper backend running with UDEV support enabled.
# dm status LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.org  OF   [16384] (*1)
Device LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.org is not active.
# Deactivating volume LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new.
# dm status LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new  OF   [16384] (*1)
Device LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new is not active.
# Releasing crypt device (null) context.
# Releasing device-mapper backend.
# Created LUKS reencryption log file LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.log.
# Log: direction = 0
# Log: offset = 0
# Log: shift = 0
# Running reencryption.
# Passhrases initialization.
# Allocating crypt device /dev/dm-10 context.
# Trying to open and read device /dev/dm-10.
# Initialising device-mapper backend library.
# Trying to load LUKS1 crypt type from device /dev/dm-10.
# Crypto backend (gcrypt 1.5.3) initialized.
# Reading LUKS header of size 1024 from device /dev/dm-10
open device /dev/dm-10
# Key length 32, device size 10483712 sectors, header size 2050 sectors.
# Setting ciphertext data device to /dev/dm-10.
# Trying to open and read device /dev/dm-10.
# Installing SIGINT/SIGTERM handler.
# Unblocking interruption on signal.
# Interactive passphrase entry requested.
Enter passphrase for key slot 1: 
# Blocking interruption on signal.
# Checking volume  [keyslot 1] using passphrase.
# Trying to open key slot 1 [ACTIVE_LAST].
# Reading key slot 1 area.
# Calculated device size is 250 sectors (RW), offset 264.
# DM-UUID is CRYPT-TEMP-temporary-cryptsetup-19880
# Udev cookie 0xd4d7ef6 (semid 7831552) created
# Udev cookie 0xd4d7ef6 (semid 7831552) incremented to 1
# Udev cookie 0xd4d7ef6 (semid 7831552) incremented to 2
# Udev cookie 0xd4d7ef6 (semid 7831552) assigned to CREATE task(0) with flags DISABLE_SUBSYSTEM_RULES DISABLE_DISK_RULES DISABLE_OTHER_RULES (0xe)
# dm create temporary-cryptsetup-19880 CRYPT-TEMP-temporary-cryptsetup-19880 OF   [16384] (*1)
# dm reload temporary-cryptsetup-19880  OFRW    [16384] (*1)
# dm resume temporary-cryptsetup-19880  OFRW    [16384] (*1)
# temporary-cryptsetup-19880: Stacking NODE_ADD (253,13) 0:6 0660 [verify_udev]
# temporary-cryptsetup-19880: Stacking NODE_READ_AHEAD 256 (flags=1)
# Udev cookie 0xd4d7ef6 (semid 7831552) decremented to 1
# Udev cookie 0xd4d7ef6 (semid 7831552) waiting for zero
# Udev cookie 0xd4d7ef6 (semid 7831552) destroyed
# temporary-cryptsetup-19880: Processing NODE_ADD (253,13) 0:6 0660 [verify_udev]
# temporary-cryptsetup-19880: Processing NODE_READ_AHEAD 256 (flags=1)
# temporary-cryptsetup-19880 (253:13): read ahead is 256
# temporary-cryptsetup-19880: retaining kernel read ahead of 256 (requested 256)
# Udev cookie 0xd4dea15 (semid 7864320) created
# Udev cookie 0xd4dea15 (semid 7864320) incremented to 1
# Udev cookie 0xd4dea15 (semid 7864320) incremented to 2
# Udev cookie 0xd4dea15 (semid 7864320) assigned to REMOVE task(2) with flags (0x0)
# dm remove temporary-cryptsetup-19880  OFT    [16384] (*1)
# temporary-cryptsetup-19880: Stacking NODE_DEL [verify_udev]
# Udev cookie 0xd4dea15 (semid 7864320) decremented to 1
# Udev cookie 0xd4dea15 (semid 7864320) waiting for zero
# Udev cookie 0xd4dea15 (semid 7864320) destroyed
# temporary-cryptsetup-19880: Processing NODE_DEL [verify_udev]
Key slot 1 unlocked.
# Releasing crypt device /dev/dm-10 context.
# Releasing device-mapper backend.
# Creating LUKS header backup for device /dev/dm-10.
# Allocating crypt device /dev/dm-10 context.
# Trying to open and read device /dev/dm-10.
# Initialising device-mapper backend library.
# Trying to load LUKS1 crypt type from device /dev/dm-10.
# Crypto backend (gcrypt 1.5.3) initialized.
# Reading LUKS header of size 1024 from device /dev/dm-10
open device /dev/dm-10
# Key length 32, device size 10483712 sectors, header size 2050 sectors.
# Crypto backend (gcrypt 1.5.3) initialized.
# Requested header backup of device /dev/dm-10 (LUKS1) to file LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.org.
# Reading LUKS header of size 1024 from device /dev/dm-10
open device /dev/dm-10
# Key length 32, device size 10483712 sectors, header size 2050 sectors.
# Storing backup of header (1024 bytes) and keyslot area (1045504 bytes).
open device /dev/dm-10
LUKS header backup of device /dev/dm-10 created.
# Creating empty file LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new of size 1049600.
# Allocating crypt device LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new context.
# Trying to open and read device LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new.
# Iteration time set to 1000 miliseconds.
# Formatting device LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new as type LUKS1.
# Crypto backend (gcrypt 1.5.3) initialized.
# Trying to open and read device /dev/dm-10.
# Generating LUKS header version 1 using hash sha1, aes, xts-plain64, MK 32 bytes
# Crypto backend (gcrypt 1.5.3) initialized.
# KDF pbkdf2, hash sha1: 285871 iterations per second.
# Data offset 4096, UUID bfeb35f1-90b9-4bc6-ba43-a4302db7957b, digest iterations 34875
open device LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new
errno is 9
# Updating LUKS header of size 1024 on device LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new
# Key length 32, device size 2050 sectors, header size 2050 sectors.
open device LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new
path is LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new
file path is (null)
errno is 9
# Reading LUKS header of size 1024 from device LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new
open device LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new
# Key length 32, device size 2050 sectors, header size 2050 sectors.
New LUKS header for device /dev/dm-10 created.
# Adding new keyslot 1 using volume key.
# Calculating data for key slot 1
# Crypto backend (gcrypt 1.5.3) initialized.
# KDF pbkdf2, hash sha1: 289023 iterations per second.
# Key slot 1 use 141124 password iterations.
# Using hash sha1 for AF in key slot 1, 4000 stripes
# Updating key slot 1 [0x21000] area.
# Allocating a free loop device.
# Trying to open and read device /dev/loop0.
# Calculated device size is 256 sectors (RW), offset 264.
# DM-UUID is CRYPT-TEMP-temporary-cryptsetup-19880
# Udev cookie 0xd4d578a (semid 7897088) created
# Udev cookie 0xd4d578a (semid 7897088) incremented to 1
# Udev cookie 0xd4d578a (semid 7897088) incremented to 2
# Udev cookie 0xd4d578a (semid 7897088) assigned to CREATE task(0) with flags DISABLE_SUBSYSTEM_RULES DISABLE_DISK_RULES DISABLE_OTHER_RULES (0xe)
# dm create temporary-cryptsetup-19880 CRYPT-TEMP-temporary-cryptsetup-19880 OF   [16384] (*1)
# dm reload temporary-cryptsetup-19880  OFW    [16384] (*1)
# dm resume temporary-cryptsetup-19880  OFW    [16384] (*1)
# temporary-cryptsetup-19880: Stacking NODE_ADD (253,13) 0:6 0660 [verify_udev]
# temporary-cryptsetup-19880: Stacking NODE_READ_AHEAD 256 (flags=1)
# Udev cookie 0xd4d578a (semid 7897088) decremented to 1
# Udev cookie 0xd4d578a (semid 7897088) waiting for zero
# Udev cookie 0xd4d578a (semid 7897088) destroyed
# temporary-cryptsetup-19880: Processing NODE_ADD (253,13) 0:6 0660 [verify_udev]
# temporary-cryptsetup-19880: Processing NODE_READ_AHEAD 256 (flags=1)
# temporary-cryptsetup-19880 (253:13): read ahead is 256
# temporary-cryptsetup-19880: retaining kernel read ahead of 256 (requested 256)
errno is 9
# Udev cookie 0xd4d5652 (semid 7929856) created
# Udev cookie 0xd4d5652 (semid 7929856) incremented to 1
# Udev cookie 0xd4d5652 (semid 7929856) incremented to 2
# Udev cookie 0xd4d5652 (semid 7929856) assigned to REMOVE task(2) with flags (0x0)
# dm remove temporary-cryptsetup-19880  OFT    [16384] (*1)
# temporary-cryptsetup-19880: Stacking NODE_DEL [verify_udev]
# Udev cookie 0xd4d5652 (semid 7929856) decremented to 1
# Udev cookie 0xd4d5652 (semid 7929856) waiting for zero
# Udev cookie 0xd4d5652 (semid 7929856) destroyed
# temporary-cryptsetup-19880: Processing NODE_DEL [verify_udev]
# Key slot 1 was enabled in LUKS header.
# Updating LUKS header of size 1024 on device LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new
# Key length 32, device size 2050 sectors, header size 2050 sectors.
open device LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new             //I thinks it should open /dev/loop0
path is /dev/loop0
file path is LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new
errno is 22
r = -1, solid = 1024
ccccccccc
Error during update of LUKS header on device LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new.
# Releasing crypt device LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new context.
# Closed loop /dev/loop0 (LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new).
# Releasing crypt device /dev/dm-10 context.
# Releasing device-mapper backend.
Creation of LUKS backup headers failed.
# Destroying reencryption context.
# Closing LUKS reencryption log file LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.log.
# Removing headers.
# Allocating crypt device (null) context.
# Initialising device-mapper backend library.
# Deactivating volume LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.org.
# dm status LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.org  OF   [16384] (*1)
Device LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.org is not active.
# Deactivating volume LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new.
# dm status LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new  OF   [16384] (*1)
Device LUKS-bfeb35f1-90b9-4bc6-ba43-a4302db7957b.new is not active.
# Releasing crypt device (null) context.
# Releasing device-mapper backend.


Best Regards
Xiao Ni