static int
hammer2_ioctl_pfs_snapshot(hammer2_inode_t *ip, void *data)
{
hammer2_ioc_pfs_t *pfs = data;
hammer2_dev_t *hmp;
hammer2_chain_t *chain;
hammer2_tid_t mtid;
int error;
if (pfs->name[0] == 0)
return(EINVAL);
if (pfs->name[sizeof(pfs->name)-1] != 0)
return(EINVAL);
hmp = ip->pmp->pfs_hmps[0];
if (hmp == NULL)
return (EINVAL);
hammer2_vfs_sync(ip->pmp->mp, MNT_WAIT);
hammer2_trans_init(ip->pmp, HAMMER2_TRANS_ISFLUSH);
mtid = hammer2_trans_sub(ip->pmp);
hammer2_inode_lock(ip, 0);
chain = hammer2_inode_chain(ip, 0, HAMMER2_RESOLVE_ALWAYS);
error = hammer2_chain_snapshot(chain, pfs, mtid);
hammer2_chain_unlock(chain);
hammer2_chain_drop(chain);
hammer2_inode_unlock(ip);
hammer2_trans_done(ip->pmp);
return (error);
}
/*
* Destroy an existing PFS under the super-root
*/
static int
hammer2_ioctl_pfs_delete(hammer2_inode_t *ip, void *data)
{
hammer2_ioc_pfs_t *pfs = data;
hammer2_dev_t *hmp;
hammer2_pfs_t *spmp;
hammer2_xop_unlink_t *xop;
hammer2_inode_t *dip;
int error;
pfs->name[sizeof(pfs->name) - 1] = 0; /* ensure termination */
hmp = ip->pmp->pfs_hmps[0];
if (hmp == NULL)
return (EINVAL);
spmp = hmp->spmp;
dip = spmp->iroot;
hammer2_trans_init(spmp, 0);
hammer2_inode_lock(dip, 0);
xop = hammer2_xop_alloc(dip, HAMMER2_XOP_MODIFYING);
hammer2_xop_setname(&xop->head, pfs->name, strlen(pfs->name));
xop->isdir = 2;
xop->dopermanent = 1;
hammer2_xop_start(&xop->head, hammer2_xop_unlink);
error = hammer2_xop_collect(&xop->head, 0);
hammer2_inode_unlock(dip);
hammer2_trans_done(spmp);
return (error);
}
/*
* Set various parameters in an inode which cannot be set through
* normal filesystem VNOPS.
*/
static int
hammer2_ioctl_inode_set(hammer2_inode_t *ip, void *data)
{
hammer2_ioc_inode_t *ino = data;
int error = 0;
hammer2_trans_init(ip->pmp, 0);
hammer2_inode_lock(ip, 0);
if ((ino->flags & HAMMER2IOC_INODE_FLAG_CHECK) &&
ip->meta.check_algo != ino->ip_data.meta.check_algo) {
hammer2_inode_modify(ip);
ip->meta.check_algo = ino->ip_data.meta.check_algo;
}
if ((ino->flags & HAMMER2IOC_INODE_FLAG_COMP) &&
ip->meta.comp_algo != ino->ip_data.meta.comp_algo) {
hammer2_inode_modify(ip);
ip->meta.comp_algo = ino->ip_data.meta.comp_algo;
}
ino->kdata = ip;
/* Ignore these flags for now...*/
if ((ino->flags & HAMMER2IOC_INODE_FLAG_IQUOTA) &&
ip->meta.inode_quota != ino->ip_data.meta.inode_quota) {
hammer2_inode_modify(ip);
ip->meta.inode_quota = ino->ip_data.meta.inode_quota;
}
if ((ino->flags & HAMMER2IOC_INODE_FLAG_DQUOTA) &&
ip->meta.data_quota != ino->ip_data.meta.data_quota) {
hammer2_inode_modify(ip);
ip->meta.data_quota = ino->ip_data.meta.data_quota;
}
if ((ino->flags & HAMMER2IOC_INODE_FLAG_COPIES) &&
ip->meta.ncopies != ino->ip_data.meta.ncopies) {
hammer2_inode_modify(ip);
ip->meta.ncopies = ino->ip_data.meta.ncopies;
}
hammer2_inode_unlock(ip);
hammer2_trans_done(ip->pmp);
return (error);
}
/*
* This is called from the mount code to initialize pmp->ihidden
*/
void
hammer2_inode_install_hidden(hammer2_pfsmount_t *pmp)
{
hammer2_trans_t trans;
hammer2_chain_t *parent;
hammer2_chain_t *chain;
hammer2_chain_t *scan;
hammer2_inode_data_t *ipdata;
hammer2_key_t key_dummy;
hammer2_key_t key_next;
int cache_index;
int error;
int count;
if (pmp->ihidden)
return;
/*
* Find the hidden directory
*/
bzero(&key_dummy, sizeof(key_dummy));
hammer2_trans_init(&trans, pmp, NULL, 0);
parent = hammer2_inode_lock_ex(pmp->iroot);
chain = hammer2_chain_lookup(&parent, &key_dummy,
HAMMER2_INODE_HIDDENDIR,
HAMMER2_INODE_HIDDENDIR,
&cache_index, 0);
if (chain) {
pmp->ihidden = hammer2_inode_get(pmp, pmp->iroot, chain);
hammer2_inode_ref(pmp->ihidden);
/*
* Remove any unlinked files which were left open as-of
* any system crash.
*/
count = 0;
scan = hammer2_chain_lookup(&chain, &key_next,
0, HAMMER2_MAX_TID,
&cache_index,
HAMMER2_LOOKUP_NODATA);
while (scan) {
if (scan->bref.type == HAMMER2_BREF_TYPE_INODE) {
hammer2_chain_delete(&trans, scan, 0);
++count;
}
scan = hammer2_chain_next(&chain, scan, &key_next,
0, HAMMER2_MAX_TID,
&cache_index,
HAMMER2_LOOKUP_NODATA);
}
hammer2_inode_unlock_ex(pmp->ihidden, chain);
hammer2_inode_unlock_ex(pmp->iroot, parent);
hammer2_trans_done(&trans);
kprintf("hammer2: PFS loaded hidden dir, "
"removed %d dead entries\n", count);
return;
}
/*
* Create the hidden directory
*/
error = hammer2_chain_create(&trans, &parent, &chain,
HAMMER2_INODE_HIDDENDIR, 0,
HAMMER2_BREF_TYPE_INODE,
HAMMER2_INODE_BYTES);
hammer2_inode_unlock_ex(pmp->iroot, parent);
hammer2_chain_modify(&trans, &chain, 0);
ipdata = &chain->data->ipdata;
ipdata->type = HAMMER2_OBJTYPE_DIRECTORY;
ipdata->inum = HAMMER2_INODE_HIDDENDIR;
ipdata->nlinks = 1;
kprintf("hammer2: PFS root missing hidden directory, creating\n");
pmp->ihidden = hammer2_inode_get(pmp, pmp->iroot, chain);
hammer2_inode_ref(pmp->ihidden);
hammer2_inode_unlock_ex(pmp->ihidden, chain);
hammer2_trans_done(&trans);
}
/*
* Create a new PFS under the super-root
*/
static int
hammer2_ioctl_pfs_create(hammer2_inode_t *ip, void *data)
{
hammer2_inode_data_t *nipdata;
hammer2_chain_t *nchain;
hammer2_dev_t *hmp;
hammer2_ioc_pfs_t *pfs;
hammer2_inode_t *nip;
hammer2_tid_t mtid;
int error;
hmp = ip->pmp->pfs_hmps[0];
if (hmp == NULL)
return (EINVAL);
pfs = data;
nip = NULL;
if (pfs->name[0] == 0)
return(EINVAL);
pfs->name[sizeof(pfs->name) - 1] = 0; /* ensure 0-termination */
if (hammer2_ioctl_pfs_lookup(ip, pfs) == 0)
return(EEXIST);
hammer2_trans_init(hmp->spmp, 0);
mtid = hammer2_trans_sub(hmp->spmp);
nip = hammer2_inode_create(hmp->spmp->iroot, NULL, NULL,
pfs->name, strlen(pfs->name), 0,
1, HAMMER2_OBJTYPE_DIRECTORY, 0,
HAMMER2_INSERT_PFSROOT, &error);
if (error == 0) {
hammer2_inode_modify(nip);
nchain = hammer2_inode_chain(nip, 0, HAMMER2_RESOLVE_ALWAYS);
hammer2_chain_modify(nchain, mtid, 0);
nipdata = &nchain->data->ipdata;
nip->meta.pfs_type = pfs->pfs_type;
nip->meta.pfs_subtype = pfs->pfs_subtype;
nip->meta.pfs_clid = pfs->pfs_clid;
nip->meta.pfs_fsid = pfs->pfs_fsid;
nip->meta.op_flags |= HAMMER2_OPFLAG_PFSROOT;
/*
* Set default compression and check algorithm. This
* can be changed later.
*
* Do not allow compression on PFS's with the special name
* "boot", the boot loader can't decompress (yet).
*/
nip->meta.comp_algo =
HAMMER2_ENC_ALGO(HAMMER2_COMP_NEWFS_DEFAULT);
nip->meta.check_algo =
HAMMER2_ENC_ALGO( HAMMER2_CHECK_ISCSI32);
if (strcasecmp(pfs->name, "boot") == 0) {
nip->meta.comp_algo =
HAMMER2_ENC_ALGO(HAMMER2_COMP_AUTOZERO);
}
#if 0
hammer2_blockref_t bref;
/* XXX new PFS needs to be rescanned / added */
bref = nchain->bref;
kprintf("ADD LOCAL PFS (IOCTL): %s\n", nipdata->filename);
hammer2_pfsalloc(nchain, nipdata, bref.modify_tid);
#endif
/* XXX rescan */
hammer2_chain_unlock(nchain);
hammer2_chain_drop(nchain);
/*
* Super-root isn't mounted, fsync it
*/
hammer2_inode_ref(nip);
hammer2_inode_unlock(nip);
hammer2_inode_fsync(nip);
hammer2_inode_drop(nip);
}
hammer2_trans_done(hmp->spmp);
return (error);
}
/*
* Primary management thread for an element of a node. A thread will exist
* for each element requiring management.
*
* No management threads are needed for the SPMP or for any PMP with only
* a single MASTER.
*
* On the SPMP - handles bulkfree and dedup operations
* On a PFS - handles remastering and synchronization
*/
void
hammer2_primary_sync_thread(void *arg)
{
hammer2_thread_t *thr = arg;
hammer2_pfs_t *pmp;
hammer2_deferred_list_t list;
hammer2_deferred_ip_t *defer;
int error;
pmp = thr->pmp;
bzero(&list, sizeof(list));
lockmgr(&thr->lk, LK_EXCLUSIVE);
while ((thr->flags & HAMMER2_THREAD_STOP) == 0) {
/*
* Handle freeze request
*/
if (thr->flags & HAMMER2_THREAD_FREEZE) {
atomic_set_int(&thr->flags, HAMMER2_THREAD_FROZEN);
atomic_clear_int(&thr->flags, HAMMER2_THREAD_FREEZE);
}
/*
* Force idle if frozen until unfrozen or stopped.
*/
if (thr->flags & HAMMER2_THREAD_FROZEN) {
lksleep(&thr->flags, &thr->lk, 0, "frozen", 0);
continue;
}
/*
* Reset state on REMASTER request
*/
if (thr->flags & HAMMER2_THREAD_REMASTER) {
atomic_clear_int(&thr->flags, HAMMER2_THREAD_REMASTER);
/* reset state */
}
/*
* Synchronization scan.
*/
kprintf("sync_slaves pfs %s clindex %d\n",
pmp->pfs_names[thr->clindex], thr->clindex);
hammer2_trans_init(pmp, 0);
hammer2_inode_ref(pmp->iroot);
for (;;) {
int didbreak = 0;
/* XXX lock synchronize pmp->modify_tid */
error = hammer2_sync_slaves(thr, pmp->iroot, &list);
if (error != EAGAIN)
break;
while ((defer = list.base) != NULL) {
hammer2_inode_t *nip;
nip = defer->ip;
error = hammer2_sync_slaves(thr, nip, &list);
if (error && error != EAGAIN)
break;
if (hammer2_thr_break(thr)) {
didbreak = 1;
break;
}
/*
* If no additional defers occurred we can
* remove this one, otherwrise keep it on
* the list and retry once the additional
* defers have completed.
*/
if (defer == list.base) {
--list.count;
list.base = defer->next;
kfree(defer, M_HAMMER2);
defer = NULL; /* safety */
hammer2_inode_drop(nip);
}
}
/*
* If the thread is being remastered, frozen, or
* stopped, clean up any left-over deferals.
*/
if (didbreak || (error && error != EAGAIN)) {
kprintf("didbreak\n");
while ((defer = list.base) != NULL) {
--list.count;
hammer2_inode_drop(defer->ip);
list.base = defer->next;
kfree(defer, M_HAMMER2);
}
if (error == 0 || error == EAGAIN)
error = EINPROGRESS;
break;
}
}
hammer2_inode_drop(pmp->iroot);
hammer2_trans_done(pmp);
if (error)
kprintf("hammer2_sync_slaves: error %d\n", error);
/*
* Wait for event, or 5-second poll.
*/
lksleep(&thr->flags, &thr->lk, 0, "h2idle", hz * 5);
}
thr->td = NULL;
wakeup(thr);
lockmgr(&thr->lk, LK_RELEASE);
/* thr structure can go invalid after this point */
}