def put(self, request, sid):
with self._handle_exception(request):
share = self._validate_share(request, sid)
if ('size' in request.data):
new_size = self._validate_share_size(request, share.pool)
qid = qgroup_id(share.pool, share.subvol_name)
cur_rusage, cur_eusage = volume_usage(share.pool, qid)
if (new_size < cur_rusage):
e_msg = ('Unable to resize because requested new '
'size {} KB is less than current usage {} KB '
'of the share.').format(new_size, cur_rusage)
handle_exception(Exception(e_msg), request)
# quota maintenance
if share.pool.quotas_enabled:
# Only try create / update quotas if they are enabled,
# pqgroup of PQGROUP_DEFAULT (-1/-1) indicates no pqgroup,
# ie quotas were disabled when update was requested.
if share.pqgroup == PQGROUP_DEFAULT or \
not share.pqgroup_exist:
# if quotas were disabled or pqgroup non-existent.
share.pqgroup = qgroup_create(share.pool)
share.save()
if share.pqgroup is not PQGROUP_DEFAULT:
# Only update quota and assign if now non default as
# default can also indicate Read-only fs at this point.
update_quota(share.pool, share.pqgroup,
new_size * 1024)
share_pqgroup_assign(share.pqgroup, share)
else:
# Our pool's quotas are disabled so reset pqgroup to -1/-1.
if share.pqgroup != PQGROUP_DEFAULT:
# Only reset if necessary
share.pqgroup = PQGROUP_DEFAULT
share.save()
share.size = new_size
if ('compression' in request.data):
new_compression = self._validate_compression(request)
if (share.compression_algo != new_compression):
share.compression_algo = new_compression
mnt_pt = '%s%s' % (settings.MNT_PT, share.name)
if (new_compression == 'no'):
new_compression = ''
set_property(mnt_pt, 'compression', new_compression)
share.save()
return Response(ShareSerializer(share).data)
def create_clone(share, new_name, request, logger, snapshot=None):
# if snapshot is None, create clone of the share.
# If it's not, then clone it.
if re.match(settings.SHARE_REGEX + "$", new_name) is None:
e_msg = ("Clone name is invalid. It must start with a letter and can "
"contain letters, digits, _, . and - characters.")
handle_exception(Exception(e_msg), request)
if Share.objects.filter(name=new_name).exists():
e_msg = "Another share with name ({}) already exists.".format(new_name)
handle_exception(Exception(e_msg), request)
if Snapshot.objects.filter(share=share, name=new_name).exists():
e_msg = ("Snapshot with name ({}) already exists for the "
"share ({}). Choose a different name.").format(
new_name, share.name)
handle_exception(Exception(e_msg), request)
try:
share_name = share.subvol_name
snap = None
if snapshot is not None:
snap = snapshot.real_name
add_clone(share.pool, share_name, new_name, snapshot=snap)
snap_id = share_id(share.pool, new_name)
qgroup_id = "0/{}".format(snap_id)
pqid = qgroup_create(share.pool)
new_share = Share(
pool=share.pool,
qgroup=qgroup_id,
pqgroup=pqid,
name=new_name,
size=share.size,
subvol_name=new_name,
)
new_share.save()
if pqid != PQGROUP_DEFAULT:
update_quota(new_share.pool, pqid, new_share.size * 1024)
share_pqgroup_assign(pqid, new_share)
# Mount our new clone share.
# We independently mount all shares, data pool or system pool, in /mnt2/name
mnt_pt = "{}{}".format(settings.MNT_PT, new_name)
mount_share(new_share, mnt_pt)
return Response(ShareSerializer(new_share).data)
except Exception as e:
handle_exception(e, request)
def create_clone(share, new_name, request, logger, snapshot=None):
# if snapshot is None, create clone of the share.
# If it's not, then clone it.
if (re.match(settings.SHARE_REGEX + '$', new_name) is None):
e_msg = ('Clone name is invalid. It must start with a letter and can'
' contain letters, digits, _, . and - characters')
handle_exception(Exception(e_msg), request)
if (Share.objects.filter(name=new_name).exists()):
e_msg = ('Another Share with name: %s already exists.' % new_name)
handle_exception(Exception(e_msg), request)
if (Snapshot.objects.filter(share=share, name=new_name).exists()):
e_msg = ('Snapshot with name: %s already exists for the '
'share: %s. Choose a different name' % (new_name, share.name))
handle_exception(Exception(e_msg), request)
try:
share_name = share.subvol_name
snap = None
if (snapshot is not None):
snap = snapshot.real_name
add_clone(share.pool, share_name, new_name, snapshot=snap)
snap_id = share_id(share.pool, new_name)
qgroup_id = ('0/%s' % snap_id)
pqid = qgroup_create(share.pool)
new_share = Share(pool=share.pool,
qgroup=qgroup_id,
pqgroup=pqid,
name=new_name,
size=share.size,
subvol_name=new_name)
new_share.save()
if pqid is not settings.MODEL_DEFS['pqgroup']:
update_quota(new_share.pool, pqid, new_share.size * 1024)
share_pqgroup_assign(pqid, new_share)
# Mount our new clone share.
mnt_pt = '{}{}'.format(settings.MNT_PT, new_name)
mount_share(new_share, mnt_pt)
return Response(ShareSerializer(new_share).data)
except Exception as e:
handle_exception(e, request)
def create_clone(share, new_name, request, logger, snapshot=None):
# if snapshot is None, create clone of the share.
# If it's not, then clone it.
if (re.match(settings.SHARE_REGEX + '$', new_name) is None):
e_msg = ('Clone name is invalid. It must start with a letter and can '
'contain letters, digits, _, . and - characters.')
handle_exception(Exception(e_msg), request)
if (Share.objects.filter(name=new_name).exists()):
e_msg = 'Another share with name ({}) already exists.'.format(new_name)
handle_exception(Exception(e_msg), request)
if (Snapshot.objects.filter(share=share, name=new_name).exists()):
e_msg = ('Snapshot with name ({}) already exists for the '
'share ({}). Choose a different name.').format(new_name,
share.name)
handle_exception(Exception(e_msg), request)
try:
share_name = share.subvol_name
snap = None
if (snapshot is not None):
snap = snapshot.real_name
add_clone(share.pool, share_name, new_name, snapshot=snap)
snap_id = share_id(share.pool, new_name)
qgroup_id = ('0/%s' % snap_id)
pqid = qgroup_create(share.pool)
new_share = Share(pool=share.pool, qgroup=qgroup_id, pqgroup=pqid,
name=new_name, size=share.size, subvol_name=new_name)
new_share.save()
if pqid is not PQGROUP_DEFAULT:
update_quota(new_share.pool, pqid, new_share.size * 1024)
share_pqgroup_assign(pqid, new_share)
# Mount our new clone share.
mnt_pt = '{}{}'.format(settings.MNT_PT, new_name)
mount_share(new_share, mnt_pt)
return Response(ShareSerializer(new_share).data)
except Exception as e:
handle_exception(e, request)
def post(self, request):
# qgroup notes for shares. we need to create a qgroup prior to share
# creation. qgroup ids 0/<subvol_id> automatically get created when a
# subvolume(i.e., a Share or a Snapshot) is created. So let's create a
# new qgroup: 2015/<some_number> whenever a Share is
# created. <some_number> starts from 1 and is incremented as more
# Shares are created. So, for the very first Share in a pool, it's
# qgroup will be 1/1. 2015 is arbitrarily chose.
# Before creating a new Share, we create the qgroup for it. And during
# it's creation, we assign this qgroup to it. During it's creation a
# 0/x qgroup will automatically be created, but it will become the
# child of our explicitly-created qgroup(2015/x).
# We will set the qgroup limit on our qgroup and it will enforce the
# quota on every subvolume(i.e., Share and Snapshot) in that qgroup.
# When a Share is deleted, we need to destroy two qgroups. One is it's
# auto 0/x qgroup and the other is our explicitly-created 2015/y
# qgroup.
with self._handle_exception(request):
pool_name = request.data.get('pool', None)
try:
pool = Pool.objects.get(name=pool_name)
except:
e_msg = 'Pool ({}) does not exist.'.format(pool_name)
handle_exception(Exception(e_msg), request)
compression = self._validate_compression(request)
size = self._validate_share_size(request, pool)
sname = request.data.get('sname', None)
if ((sname is None or
re.match('%s$' % settings.SHARE_REGEX, sname) is None)):
e_msg = ('Invalid characters in share name. Following are '
'allowed: letter(a-z or A-Z), digit(0-9), '
'hyphen(-), underscore(_) or a period(.).')
handle_exception(Exception(e_msg), request)
if (len(sname) > 254):
# btrfs subvolume names cannot exceed 254 characters.
e_msg = ('Share name length cannot exceed 254 characters.')
handle_exception(Exception(e_msg), request)
if (Share.objects.filter(name=sname).exists()):
# Note e_msg is consumed by replication/util.py create_share()
e_msg = ('Share ({}) already exists. Choose a '
'different name.').format(sname)
handle_exception(Exception(e_msg), request)
if (Pool.objects.filter(name=sname).exists()):
e_msg = ('A pool with this name ({}) exists. Share '
'and pool names must be distinct. Choose '
'a different name.').format(sname)
handle_exception(Exception(e_msg), request)
replica = False
if ('replica' in request.data):
replica = request.data['replica']
if (type(replica) != bool):
# TODO: confirm this 'type' call works as format parameter.
e_msg = ('Replica must be a boolean, '
'not ({}).').format(type(replica))
handle_exception(Exception(e_msg), request)
pqid = qgroup_create(pool)
add_share(pool, sname, pqid)
qid = qgroup_id(pool, sname)
s = Share(pool=pool, qgroup=qid, pqgroup=pqid, name=sname,
size=size, subvol_name=sname, replica=replica,
compression_algo=compression)
# The following pool.save() was informed by test_share.py
pool.save()
s.save()
if pqid is not PQGROUP_DEFAULT:
update_quota(pool, pqid, size * 1024)
share_pqgroup_assign(pqid, s)
mnt_pt = '%s%s' % (settings.MNT_PT, sname)
if not s.is_mounted:
mount_share(s, mnt_pt)
if (compression != 'no'):
set_property(mnt_pt, 'compression', compression)
return Response(ShareSerializer(s).data)
def import_shares(pool, request):
# Establish known shares/subvols within our db for the given pool:
shares_in_pool_db = [s.name for s in Share.objects.filter(pool=pool)]
# Find the actual/current shares/subvols within the given pool:
# Limited to Rockstor relevant subvols ie shares and clones.
shares_in_pool = shares_info(pool)
# List of pool's share.pqgroups so we can remove inadvertent duplication.
# All pqgroups are removed when quotas are disabled, combined with a part
# refresh we could have duplicates within the db.
share_pqgroups_used = []
# Delete db Share object if it is no longer found on disk.
for s_in_pool_db in shares_in_pool_db:
if s_in_pool_db not in shares_in_pool:
logger.debug("Removing, missing on disk, share db entry ({}) from "
"pool ({}).".format(s_in_pool_db, pool.name))
Share.objects.get(pool=pool, name=s_in_pool_db).delete()
# Check if each share in pool also has a db counterpart.
for s_in_pool in shares_in_pool:
logger.debug("---- Share name = {}.".format(s_in_pool))
if s_in_pool in shares_in_pool_db:
logger.debug("Updating pre-existing same pool db share entry.")
# We have a pool db share counterpart so retrieve and update it.
share = Share.objects.get(name=s_in_pool, pool=pool)
# Initially default our pqgroup value to db default of '-1/-1'
# This way, unless quotas are enabled, all pqgroups will be
# returned to db default.
pqgroup = PQGROUP_DEFAULT
if share.pool.quotas_enabled:
# Quotas are enabled on our pool so we can validate pqgroup.
if (share.pqgroup == pqgroup or not share.pqgroup_exist
or share.pqgroup in share_pqgroups_used):
# we have a void '-1/-1' or non existent pqgroup or
# this pqgroup has already been seen / used in this pool.
logger.debug(
"#### replacing void, non-existent, or duplicate pqgroup."
)
pqgroup = qgroup_create(pool)
if pqgroup != PQGROUP_DEFAULT:
update_quota(pool, pqgroup, share.size * 1024)
share_pqgroup_assign(pqgroup, share)
else:
# Our share's pqgroup looks OK so use it.
pqgroup = share.pqgroup
# Record our use of this pqgroup to spot duplicates later.
share_pqgroups_used.append(deepcopy(share.pqgroup))
if share.pqgroup != pqgroup:
# we need to update our share.pqgroup
share.pqgroup = pqgroup
share.save()
share.qgroup = shares_in_pool[s_in_pool]
rusage, eusage, pqgroup_rusage, pqgroup_eusage = volume_usage(
pool, share.qgroup, pqgroup)
if (rusage != share.rusage or eusage != share.eusage
or pqgroup_rusage != share.pqgroup_rusage
or pqgroup_eusage != share.pqgroup_eusage):
share.rusage = rusage
share.eusage = eusage
share.pqgroup_rusage = pqgroup_rusage
share.pqgroup_eusage = pqgroup_eusage
update_shareusage_db(s_in_pool, rusage, eusage)
else:
update_shareusage_db(s_in_pool, rusage, eusage, UPDATE_TS)
share.save()
continue
try:
logger.debug("No prior entries in scanned pool trying all pools.")
# Test (Try) for an existing system wide Share db entry.
cshare = Share.objects.get(name=s_in_pool)
# Get a list of Rockstor relevant subvols (ie shares and clones)
# for the prior existing db share entry's pool.
cshares_d = shares_info(cshare.pool)
if s_in_pool in cshares_d:
e_msg = ("Another pool ({}) has a share with this same "
"name ({}) as this pool ({}). This configuration "
"is not supported. You can delete one of them "
"manually with the following command: "
'"btrfs subvol delete {}[pool name]/{}" WARNING this '
"will remove the entire contents of that "
"subvolume.").format(cshare.pool.name, s_in_pool,
pool.name, settings.MNT_PT,
s_in_pool)
handle_exception(Exception(e_msg), request)
else:
# Update the prior existing db share entry previously
# associated with another pool.
logger.debug("Updating prior db entry from another pool.")
cshare.pool = pool
cshare.qgroup = shares_in_pool[s_in_pool]
cshare.size = pool.size
cshare.subvol_name = s_in_pool
(
cshare.rusage,
cshare.eusage,
cshare.pqgroup_rusage,
cshare.pqgroup_eusage,
) = volume_usage(pool, cshare.qgroup, cshare.pqgroup)
cshare.save()
update_shareusage_db(s_in_pool, cshare.rusage, cshare.eusage)
except Share.DoesNotExist:
logger.debug("Db share entry does not exist - creating.")
# We have a share on disk that has no db counterpart so create one.
# Retrieve new pool quota id for use in db Share object creation.
# As the replication receive share is 'special' we tag it as such.
replica = False
share_name = s_in_pool
if re.match(".snapshot", s_in_pool) is not None:
# We have an initial replication share, non snap in .snapshots.
# We could change it's name here but still a little mixing
# of name and subvol throughout project.
replica = True
logger.debug("Initial receive quirk-subvol found: Importing "
"as share and setting replica flag.")
qid = shares_in_pool[s_in_pool]
pqid = qgroup_create(pool)
if pqid != PQGROUP_DEFAULT:
update_quota(pool, pqid, pool.size * 1024)
qgroup_assign(qid, pqid, pool.mnt_pt)
rusage, eusage, pqgroup_rusage, pqgroup_eusage = volume_usage(
pool, qid, pqid)
nso = Share(
pool=pool,
qgroup=qid,
pqgroup=pqid,
name=share_name,
size=pool.size,
subvol_name=s_in_pool,
rusage=rusage,
eusage=eusage,
pqgroup_rusage=pqgroup_rusage,
pqgroup_eusage=pqgroup_eusage,
replica=replica,
)
nso.save()
update_shareusage_db(s_in_pool, rusage, eusage)
mount_share(nso, "{}{}".format(settings.MNT_PT, s_in_pool))
def import_shares(pool, request):
# Establish known shares/subvols within our db for the given pool:
shares_in_pool_db = [s.name for s in Share.objects.filter(pool=pool)]
# Find the actual/current shares/subvols within the given pool:
# Limited to Rockstor relevant subvols ie shares and clones.
shares_in_pool = shares_info(pool)
# List of pool's share.pqgroups so we can remove inadvertent duplication.
# All pqgroups are removed when quotas are disabled, combined with a part
# refresh we could have duplicates within the db.
share_pqgroups_used = []
# Delete db Share object if it is no longer found on disk.
for s_in_pool_db in shares_in_pool_db:
if s_in_pool_db not in shares_in_pool:
logger.debug('Removing, missing on disk, share db entry ({}) from '
'pool ({}).'.format(s_in_pool_db, pool.name))
Share.objects.get(pool=pool, name=s_in_pool_db).delete()
# Check if each share in pool also has a db counterpart.
for s_in_pool in shares_in_pool:
logger.debug('---- Share name = {}.'.format(s_in_pool))
if s_in_pool in shares_in_pool_db:
logger.debug('Updating pre-existing same pool db share entry.')
# We have a pool db share counterpart so retrieve and update it.
share = Share.objects.get(name=s_in_pool, pool=pool)
# Initially default our pqgroup value to db default of '-1/-1'
# This way, unless quotas are enabled, all pqgroups will be
# returned to db default.
pqgroup = PQGROUP_DEFAULT
if share.pool.quotas_enabled:
# Quotas are enabled on our pool so we can validate pqgroup.
if share.pqgroup == pqgroup or not share.pqgroup_exist \
or share.pqgroup in share_pqgroups_used:
# we have a void '-1/-1' or non existent pqgroup or
# this pqgroup has already been seen / used in this pool.
logger.debug('#### replacing void, non-existent, or '
'duplicate pqgroup.')
pqgroup = qgroup_create(pool)
if pqgroup is not PQGROUP_DEFAULT:
update_quota(pool, pqgroup, share.size * 1024)
share_pqgroup_assign(pqgroup, share)
else:
# Our share's pqgroup looks OK so use it.
pqgroup = share.pqgroup
# Record our use of this pqgroup to spot duplicates later.
share_pqgroups_used.append(deepcopy(share.pqgroup))
if share.pqgroup != pqgroup:
# we need to update our share.pqgroup
share.pqgroup = pqgroup
share.save()
share.qgroup = shares_in_pool[s_in_pool]
rusage, eusage, pqgroup_rusage, pqgroup_eusage = \
volume_usage(pool, share.qgroup, pqgroup)
if (rusage != share.rusage or eusage != share.eusage or
pqgroup_rusage != share.pqgroup_rusage or
pqgroup_eusage != share.pqgroup_eusage):
share.rusage = rusage
share.eusage = eusage
share.pqgroup_rusage = pqgroup_rusage
share.pqgroup_eusage = pqgroup_eusage
update_shareusage_db(s_in_pool, rusage, eusage)
else:
update_shareusage_db(s_in_pool, rusage, eusage, UPDATE_TS)
share.save()
continue
try:
logger.debug('No prior entries in scanned pool trying all pools.')
# Test (Try) for an existing system wide Share db entry.
cshare = Share.objects.get(name=s_in_pool)
# Get a list of Rockstor relevant subvols (ie shares and clones)
# for the prior existing db share entry's pool.
cshares_d = shares_info(cshare.pool)
if s_in_pool in cshares_d:
e_msg = ('Another pool ({}) has a share with this same '
'name ({}) as this pool ({}). This configuration '
'is not supported. You can delete one of them '
'manually with the following command: '
'"btrfs subvol delete {}[pool name]/{}" WARNING this '
'will remove the entire contents of that '
'subvolume.').format(cshare.pool.name, s_in_pool,
pool.name, settings.MNT_PT,
s_in_pool)
handle_exception(Exception(e_msg), request)
else:
# Update the prior existing db share entry previously
# associated with another pool.
logger.debug('Updating prior db entry from another pool.')
cshare.pool = pool
cshare.qgroup = shares_in_pool[s_in_pool]
cshare.size = pool.size
cshare.subvol_name = s_in_pool
(cshare.rusage, cshare.eusage, cshare.pqgroup_rusage,
cshare.pqgroup_eusage) = volume_usage(pool, cshare.qgroup,
cshare.pqgroup)
cshare.save()
update_shareusage_db(s_in_pool, cshare.rusage, cshare.eusage)
except Share.DoesNotExist:
logger.debug('Db share entry does not exist - creating.')
# We have a share on disk that has no db counterpart so create one.
# Retrieve new pool quota id for use in db Share object creation.
# As the replication receive share is 'special' we tag it as such.
replica = False
share_name = s_in_pool
if re.match('.snapshot', s_in_pool) is not None:
# We have an initial replication share, non snap in .snapshots.
# We could change it's name here but still a little mixing
# of name and subvol throughout project.
replica = True
logger.debug('Initial receive quirk-subvol found: Importing '
'as share and setting replica flag.')
qid = shares_in_pool[s_in_pool]
pqid = qgroup_create(pool)
if pqid is not PQGROUP_DEFAULT:
update_quota(pool, pqid, pool.size * 1024)
pool_mnt_pt = '{}{}'.format(settings.MNT_PT, pool.name)
qgroup_assign(qid, pqid, pool_mnt_pt)
rusage, eusage, pqgroup_rusage, pqgroup_eusage = \
volume_usage(pool, qid, pqid)
nso = Share(pool=pool, qgroup=qid, pqgroup=pqid, name=share_name,
size=pool.size, subvol_name=s_in_pool, rusage=rusage,
eusage=eusage, pqgroup_rusage=pqgroup_rusage,
pqgroup_eusage=pqgroup_eusage,
replica=replica)
nso.save()
update_shareusage_db(s_in_pool, rusage, eusage)
mount_share(nso, '%s%s' % (settings.MNT_PT, s_in_pool))
def import_shares(pool, request):
# Establish known shares/subvols within our db for the given pool:
shares_in_pool_db = [s.name for s in Share.objects.filter(pool=pool)]
# Find the actual/current shares/subvols within the given pool:
# Limited to Rockstor relevant subvols ie shares and clones.
shares_in_pool = shares_info(pool)
# List of pool's share.pqgroups so we can remove inadvertent duplication.
# All pqgroups are removed when quotas are disabled, combined with a part
# refresh we could have duplicates within the db.
share_pqgroups_used = []
# Delete db Share object if it is no longer found on disk.
for s_in_pool_db in shares_in_pool_db:
if s_in_pool_db not in shares_in_pool:
Share.objects.get(pool=pool, name=s_in_pool_db).delete()
# Check if each share in pool also has a db counterpart.
for s_in_pool in shares_in_pool:
logger.debug('---- Share name = {}.'.format(s_in_pool))
if s_in_pool in shares_in_pool_db:
logger.debug('Updating pre-existing same pool db share entry.')
# We have a pool db share counterpart so retrieve and update it.
share = Share.objects.get(name=s_in_pool, pool=pool)
# Initially default our pqgroup value to db default of '-1/-1'
# This way, unless quotas are enabled, all pqgroups will be
# returned to db default.
pqgroup = settings.MODEL_DEFS['pqgroup']
if share.pool.quotas_enabled:
# Quotas are enabled on our pool so we can validate pqgroup.
if share.pqgroup == pqgroup or not share.pqgroup_exist \
or share.pqgroup in share_pqgroups_used:
# we have a void '-1/-1' or non existent pqgroup or
# this pqgroup has already been seen / used in this pool.
logger.debug('#### replacing void, non-existent, or '
'duplicate pqgroup')
pqgroup = qgroup_create(pool)
update_quota(pool, pqgroup, share.size * 1024)
share_pqgroup_assign(pqgroup, share)
else:
# Our share's pqgroup looks OK so use it.
pqgroup = share.pqgroup
# Record our use of this pqgroup to spot duplicates later.
share_pqgroups_used.append(deepcopy(share.pqgroup))
if share.pqgroup != pqgroup:
# we need to update our share.pqgroup
share.pqgroup = pqgroup
share.save()
share.qgroup = shares_in_pool[s_in_pool]
rusage, eusage, pqgroup_rusage, pqgroup_eusage = \
volume_usage(pool, share.qgroup, pqgroup)
if (rusage != share.rusage or eusage != share.eusage
or pqgroup_rusage != share.pqgroup_rusage
or pqgroup_eusage != share.pqgroup_eusage):
share.rusage = rusage
share.eusage = eusage
share.pqgroup_rusage = pqgroup_rusage
share.pqgroup_eusage = pqgroup_eusage
update_shareusage_db(s_in_pool, rusage, eusage)
else:
update_shareusage_db(s_in_pool, rusage, eusage, UPDATE_TS)
share.save()
continue
try:
logger.debug('No prior entries in scanned pool trying all pools.')
# Test (Try) for an existing system wide Share db entry.
cshare = Share.objects.get(name=s_in_pool)
# Get a list of Rockstor relevant subvols (ie shares and clones)
# for the prior existing db share entry's pool.
cshares_d = shares_info(cshare.pool)
if s_in_pool in cshares_d:
e_msg = ('Another pool ({}) has a Share with this same '
'name ({}) as this pool ({}). This configuration '
'is not supported. You can delete one of them '
'manually with the following command: '
'"btrfs subvol delete {}[pool name]/{}" WARNING this '
'will remove the entire contents of that subvolume.'.
format(cshare.pool.name, s_in_pool, pool.name,
settings.MNT_PT, s_in_pool))
handle_exception(Exception(e_msg), request)
else:
# Update the prior existing db share entry previously
# associated with another pool.
logger.debug('Updating prior db entry from another pool.')
cshare.pool = pool
cshare.qgroup = shares_in_pool[s_in_pool]
cshare.size = pool.size
cshare.subvol_name = s_in_pool
(cshare.rusage, cshare.eusage, cshare.pqgroup_rusage,
cshare.pqgroup_eusage) = volume_usage(pool, cshare.qgroup,
cshare.pqgroup)
cshare.save()
update_shareusage_db(s_in_pool, cshare.rusage, cshare.eusage)
except Share.DoesNotExist:
logger.debug('Db share entry does not exist - creating.')
# We have a share on disk that has no db counterpart so create one.
# Retrieve new pool quota id for use in db Share object creation.
pqid = qgroup_create(pool)
update_quota(pool, pqid, pool.size * 1024)
rusage, eusage, pqgroup_rusage, pqgroup_eusage = \
volume_usage(pool, shares_in_pool[s_in_pool], pqid)
nso = Share(pool=pool,
qgroup=shares_in_pool[s_in_pool],
pqgroup=pqid,
name=s_in_pool,
size=pool.size,
subvol_name=s_in_pool,
rusage=rusage,
eusage=eusage,
pqgroup_rusage=pqgroup_rusage,
pqgroup_eusage=pqgroup_eusage)
nso.save()
update_shareusage_db(s_in_pool, rusage, eusage)
mount_share(nso, '%s%s' % (settings.MNT_PT, s_in_pool))
