Re: lvm volume like support
That's great, but the issue is that usually the block device version
performs better than just creating a file and using it as a raw image
or loop device. Creating a file, then running it through a SCSI target
seems like it's going in the opposite direction.
On Wed, Feb 27, 2013 at 2:57 AM, Alex Elsayed eternal...@gmail.com wrote:
Alex Elsayed wrote:
Roman Mamedov wrote:
On Wed, 27 Feb 2013 13:23:23 +1100
Fajar A. Nugraha l...@fajar.net wrote:
snip
This could be pretty easily put into a shell script that uses du -b and
manually pokes configfs instead of calling tcm_node, and it'd be able to
run without any nonstandard userspace dependencies.
Just for fun, I decided to put my money where my mouth is and implement
a quick scsi-target-losetup that actually worked, both for creation and
deletion. Here it is:
---cut---
#!/bin/bash
gen_naa() {
local UUID=$( uuidgen -r )
UUID=${UUID//-/}
UUID=${UUID:0:9}
echo naa.6001405${UUID}
}
setup() {
local FILE
local INPUT_NAME
local NAME
local BACKEND_IDX
local TRANSPORT_IDX
declare -a NAA
FILE=${1}
INPUT_NAME=${2}
NAME=${INPUT_NAME//\//_}
BACKEND_IDX='-1'
TRANSPORT_IDX='-1'
if [[ $UID -ne 0 ]]; then
echo You must be root in order to set up a lioloop device 2
exit 1
fi
if [[ ${NAME} != ${INPUT_NAME} ]]; then
echo The chosen name '${INPUT_NAME}' contained slashes, using
'${NAME}' instead 2
fi
declare SIZE=$(du -b ${FILE})
SIZE=${SIZE/[^0123456789]*}
# Load the scsi target core and backends
modprobe target_core_mod /dev/null 21
while BACKEND_IDX=$((BACKEND_IDX + 1)); do
if [[ -d
/sys/kernel/config/target/core/fileio_${BACKEND_IDX}/${NAME} ]]; then
echo A backstore with the name '${NAME}' already exists 2
exit 1
elif ! [[ -d /sys/kernel/config/target/core/fileio_${BACKEND_IDX} ]];
then
#mkdir -p
/sys/kernel/config/target/core/fileio_${BACKEND_IDX}/${NAME}
# Tell it where the file is and how big it is
tcm_node --establishdev fileio_${BACKEND_IDX}/${NAME} \
fd_dev_name=${FILE},fd_dev_size=${SIZE}
# Give it a unique serial
tcm_node --setunitserialwithmd fileio_${BACKEND_IDX}/${NAME}
$(uuidgen -r)
break
fi
done
# Load the local scsi frontend transport
modprobe tcm_loop /dev/null 21
mkdir -p /sys/kernel/config/target/loopback
NAA=( $(gen_naa) $(gen_naa) )
# Some setup so you have a place to put LUNs
mkdir -p /sys/kernel/config/target/loopback/${NAA[0]}/tpgt_1
echo ${NAA[1]}
/sys/kernel/config/target/loopback/${NAA[0]}/tpgt_1/nexus
# Create a fresh LUN...
while TRANSPORT_IDX=$((TRANSPORT_IDX + 1)); do
if ! [[ -d
/sys/kernel/config/target/loopback/${NAA[0]}/tpgt_1/lun/lun_${TRANSPORT_IDX}
]]; then
mkdir -p
/sys/kernel/config/target/loopback/${NAA[0]}/tpgt_1/lun/lun_${TRANSPORT_IDX}
# ...and map the file to it.
ln -s
/sys/kernel/config/target/core/fileio_${BACKEND_IDX}/${NAME} \
/sys/kernel/config/target/loopback/${NAA[0]}/tpgt_1/lun/lun_${TRANSPORT_IDX}
break
fi
done
}
teardown() {
local INPUT_NAME=${1}
local NAME=${INPUT_NAME//\//_}
if [[ $UID -ne 0 ]]; then
echo You must be root in order to tear down a lioloop device 2
exit 1
fi
if [[ ${NAME} != ${INPUT_NAME} ]]; then
echo The chosen name '${INPUT_NAME}' contained slashes, using
'${NAME}' instead 2
fi
local FOUND=''
for LUN in /sys/kernel/config/target/loopback/*/tpgt_1/lun/lun_*; do
if [[ -L ${LUN}/${NAME} ]]; then
rm -f ${LUN}/${NAME}
FOUND=1
fi
done
if [[ -z ${FOUND} ]]; then
echo No lioloop with the name '${NAME}' was found 2
return
fi
for BACKSTORE in /sys/kernel/config/target/core/fileio_*; do
if [[ -d ${BACKSTORE}/${NAME} ]]; then
rmdir ${BACKSTORE}/${NAME}
fi
done
}
if [[ $1 == '-d' ]]; then
shift;
for name in $@; do
teardown ${name}
done
else
setup $@
fi
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Re: Low volume list ?
Aren't the subjects like [PATCH and [GIT specifically so people can filter the messages how they see fit? On Thu, Sep 1, 2011 at 9:01 AM, Swâmi Petaramesh sw...@petaramesh.org wrote: Hi list, Could it be considered to create a low-volume, user-oriented mailing-list that wouldn't spit an email for each and every git pull or patch, which are of interest to developpers only, and of no interest at all for users ? I personally am in need of information about BTRFS, i.e. new features, pitfalls, bugs, important fixes or when will btrfsck be available ?, but I've already unsubscribed (and then re-subscribed...) twice to this list, annoyed by the point to which it was spamming my mailbox with information among which 99% is of no interest to me, although 1% is very interesting :-} -- Swâmi Petaramesh sw...@petaramesh.org http://petaramesh.org PGP 9076E32E Avant qu'une personne n'étudie le Zen, les montagnes sont les montagnes, les eaux sont les eaux. Après un premier aperçu de la vérité du Zen, les montagnes ne sont plus les montagnes, les eaux ne sont plus les eaux. Après l'éveil, les montagnes sont de nouveau les montagnes, les eaux de nouveau les eaux. -- Kôan Zen -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: kernel BUG at fs/btrfs/delayed-inode.c:1693!
I too have run into this just today, file system is nearly fresh: [ cut here ] kernel BUG at fs/btrfs/delayed-inode.c:1693! invalid opcode: [#9] SMP CPU 21 Modules linked in: btrfs zlib_deflate ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables ipv6 serio_raw pcspkr amd64_edac_mod edac_core edac_mce_amd i2c_piix4 i2c_core igb dca sg ses enclosure ext4 mbcache jbd2 sd_mod crc_t10dif ata_generic pata_acpi pata_atiixp ahci libahci megaraid_sas dm_mod [last unloaded: scsi_wait_scan] Pid: 4445, comm: cosd Tainted: G D W 3.0.0 #5 Supermicro H8DGT/H8DGT RIP: 0010:[a02756d0] [a02756d0] btrfs_delayed_update_inode+0x120/0x130 [btrfs] RSP: 0018:8807ea0ddbb8 EFLAGS: 00010286 RAX: ffe4 RBX: 8804814cebe8 RCX: 00018000 RDX: 00017000 RSI: 00018000 RDI: 8807eb8f41d0 RBP: 8807ea0ddbf8 R08: R09: 0016 R10: R11: R12: 8804814cec30 R13: 88067df691d8 R14: 8803f3a7da50 R15: 8807dea6a800 FS: 7fb19f027700() GS:88081f4a() knlGS: CS: 0010 DS: ES: CR0: 80050033 CR2: 7fd83c1d2000 CR3: 0007eba74000 CR4: 06e0 DR0: DR1: DR2: DR3: DR6: 0ff0 DR7: 0400 Process cosd (pid: 4445, threadinfo 8807ea0dc000, task 8807eb022a80) Stack: 0001 00018000 a7f0 88067df691d8 8803f3a7da50 88067df691d8 880654f58a30 8807ea0ddc48 a0233a43 8807ea5839a8 018c Call Trace: [a0233a43] btrfs_update_inode+0x53/0x160 [btrfs] [a025cfec] btrfs_ioctl_clone+0x9bc/0xc90 [btrfs] [a025d5db] btrfs_ioctl+0x31b/0xd20 [btrfs] [811675c9] ? do_filp_open+0x49/0xa0 [8116a27a] do_vfs_ioctl+0x9a/0x540 [8116a7c1] sys_ioctl+0xa1/0xb0 [8153eec2] system_call_fastpath+0x16/0x1b Code: 00 03 00 00 8d 0c 49 48 89 ca 48 89 4d c8 e8 28 db f9 ff 85 c0 48 8b 4d c8 75 10 48 89 4b 08 e9 40 ff ff ff 0f 1f 80 00 00 00 00 0f 0b eb fe 66 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 48 RIP [a02756d0] btrfs_delayed_update_inode+0x120/0x130 [btrfs] RSP 8807ea0ddbb8 ---[ end trace a90b454752c77b8a ]--- Just prior to this, lots of these: [ cut here ] WARNING: at fs/btrfs/inode.c:2194 btrfs_orphan_commit_root+0xb0/0xc0 [btrfs]() Hardware name: H8DGT Modules linked in: btrfs zlib_deflate ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables ipv6 serio_raw pcspkr amd64_edac_mod edac_core edac_mce_amd i2c_piix4 i2c_core igb dca sg ses enclosure ext4 mbcache jbd2 sd_mod crc_t10dif ata_generic pata_acpi pata_atiixp ahci libahci megaraid_sas dm_mod [last unloaded: scsi_wait_scan] Pid: 5445, comm: kworker/14:0 Tainted: GW 3.0.0 #5 Call Trace: [8106000f] warn_slowpath_common+0x7f/0xc0 [8106006a] warn_slowpath_null+0x1a/0x20 [a022f240] btrfs_orphan_commit_root+0xb0/0xc0 [btrfs] [a022a835] commit_fs_roots+0xc5/0x1b0 [btrfs] [a022b8ee] btrfs_commit_transaction+0x40e/0x850 [btrfs] [81059e5f] ? dequeue_task_fair+0x20f/0x220 [8100a78b] ? __switch_to+0x12b/0x320 [810825d0] ? wake_up_bit+0x40/0x40 [a022c000] ? btrfs_end_transaction+0x20/0x20 [btrfs] [a022c01f] do_async_commit+0x1f/0x30 [btrfs] [8107b971] process_one_work+0x131/0x450 [8107d51c] worker_thread+0x17c/0x3c0 [8107d3a0] ? manage_workers+0x220/0x220 [81081f56] kthread+0x96/0xa0 [81540004] kernel_thread_helper+0x4/0x10 [81081ec0] ? kthread_worker_fn+0x1a0/0x1a0 [8154] ? gs_change+0x13/0x13 ---[ end trace a90b454752c77b80 ]--- -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: WARNING: at fs/btrfs/inode.c:2204
Ahh , this was the kernel warning you mentioned over at ceph. I just ran into it as well, with a fresh ceph system, all storage nodes are doing it (must be the cool thing), seems to have led to (or coincidentally followed by) the kernel BUG at fs/btrfs/delayed-inode.c:1693! emailed about. WARNING: at fs/btrfs/inode.c:2194 btrfs_orphan_commit_root+0xb0/0xc0 [btrfs]() Hardware name: H8DGT Modules linked in: btrfs zlib_deflate ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables ipv6 serio_raw pcspkr amd64_edac_mod edac_core edac_mce_amd i2c_piix4 i2c_core igb dca sg ses enclosure ext4 mbcache jbd2 sd_mod crc_t10dif ata_generic pata_acpi pata_atiixp ahci libahci megaraid_sas dm_mod [last unloaded: scsi_wait_scan] Pid: 3066, comm: kworker/13:2 Tainted: GW 3.0.0 #5 Call Trace: [8106000f] warn_slowpath_common+0x7f/0xc0 [8106006a] warn_slowpath_null+0x1a/0x20 [a022f240] btrfs_orphan_commit_root+0xb0/0xc0 [btrfs] [a022a835] commit_fs_roots+0xc5/0x1b0 [btrfs] [a022b8ee] btrfs_commit_transaction+0x40e/0x850 [btrfs] [8100a78b] ? __switch_to+0x12b/0x320 [810825d0] ? wake_up_bit+0x40/0x40 [a022c000] ? btrfs_end_transaction+0x20/0x20 [btrfs] [a022c01f] do_async_commit+0x1f/0x30 [btrfs] [8107b971] process_one_work+0x131/0x450 [8107d51c] worker_thread+0x17c/0x3c0 [8107d3a0] ? manage_workers+0x220/0x220 [81081f56] kthread+0x96/0xa0 [81540004] kernel_thread_helper+0x4/0x10 [81081ec0] ? kthread_worker_fn+0x1a0/0x1a0 [8154] ? gs_change+0x13/0x13 ---[ end trace a90b454752c77b78 ]--- -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
