static void
vdev_queue_io_add(vdev_queue_t *vq, zio_t *zio)
{
spa_t *spa = zio->io_spa;
spa_stats_history_t *ssh = &spa->spa_stats.io_history;
ASSERT3U(zio->io_priority, <, ZIO_PRIORITY_NUM_QUEUEABLE);
avl_add(vdev_queue_class_tree(vq, zio->io_priority), zio);
avl_add(vdev_queue_type_tree(vq, zio->io_type), zio);
if (ssh->kstat != NULL) {
mutex_enter(&ssh->lock);
kstat_waitq_enter(ssh->kstat->ks_data);
mutex_exit(&ssh->lock);
}
}
int
zfsctl_unmount_snapshot(zfs_sb_t *zsb, char *name, int flags)
{
zfs_snapentry_t search;
zfs_snapentry_t *sep;
int error = 0;
mutex_enter(&zsb->z_ctldir_lock);
search.se_name = name;
sep = avl_find(&zsb->z_ctldir_snaps, &search, NULL);
if (sep) {
avl_remove(&zsb->z_ctldir_snaps, sep);
error = __zfsctl_unmount_snapshot(sep, flags);
if (error == EBUSY)
avl_add(&zsb->z_ctldir_snaps, sep);
else
zfsctl_sep_free(sep);
} else {
error = ENOENT;
}
mutex_exit(&zsb->z_ctldir_lock);
ASSERT3S(error, >=, 0);
return (error);
}
/*
* Traverse all mounted snapshots and attempt to unmount them. This
* is best effort, on failure EEXIST is returned and count will be set
* to the number of file snapshots which could not be unmounted.
*/
int
zfsctl_unmount_snapshots(zfs_sb_t *zsb, int flags, int *count)
{
zfs_snapentry_t *sep, *next;
int error = 0;
*count = 0;
ASSERT(zsb->z_ctldir != NULL);
mutex_enter(&zsb->z_ctldir_lock);
sep = avl_first(&zsb->z_ctldir_snaps);
while (sep != NULL) {
next = AVL_NEXT(&zsb->z_ctldir_snaps, sep);
avl_remove(&zsb->z_ctldir_snaps, sep);
error = __zfsctl_unmount_snapshot(sep, flags);
if (error == EBUSY) {
avl_add(&zsb->z_ctldir_snaps, sep);
(*count)++;
} else {
zfsctl_sep_free(sep);
}
sep = next;
}
mutex_exit(&zsb->z_ctldir_lock);
return ((*count > 0) ? EEXIST : 0);
}
int32_t init_container_resource(container_handle_t **ct, const char *ct_name)
{
container_handle_t *tmp_ct = NULL;
ASSERT(ct != NULL);
ASSERT(ct_name != NULL);
tmp_ct = (container_handle_t *)OS_MALLOC(sizeof(container_handle_t));
if (!tmp_ct)
{
LOG_ERROR("Allocate memory failed. size(%d)\n", (uint32_t)sizeof(container_handle_t));
return -INDEX_ERR_ALLOCATE_MEMORY;
}
memset(tmp_ct, 0, sizeof(container_handle_t));
strncpy(tmp_ct->name, ct_name, OFS_NAME_SIZE);
OS_RWLOCK_INIT(&tmp_ct->ct_lock);
OS_RWLOCK_INIT(&tmp_ct->metadata_cache_lock);
tmp_ct->ref_cnt = 1;
avl_create(&tmp_ct->obj_info_list, (int (*)(const void *, const void*))compare_object1, sizeof(object_info_t),
OS_OFFSET(object_info_t, entry));
avl_create(&tmp_ct->metadata_cache, (int (*)(const void *, const void*))compare_cache1, sizeof(ofs_block_cache_t),
OS_OFFSET(ofs_block_cache_t, fs_entry));
avl_add(g_container_list, tmp_ct);
*ct = tmp_ct;
return 0;
}
static void
trim_map_vdev_commit(spa_t *spa, zio_t *zio, vdev_t *vd)
{
trim_map_t *tm = vd->vdev_trimmap;
trim_seg_t *ts;
uint64_t start, size, txglimit;
ASSERT(vd->vdev_ops->vdev_op_leaf);
if (tm == NULL)
return;
txglimit = MIN(spa->spa_syncing_txg, spa_freeze_txg(spa)) -
trim_txg_limit;
mutex_enter(&tm->tm_lock);
/*
* Loop until we send all frees up to the txglimit.
*/
while ((ts = trim_map_first(tm, txglimit)) != NULL) {
list_remove(&tm->tm_head, ts);
avl_remove(&tm->tm_queued_frees, ts);
avl_add(&tm->tm_inflight_frees, ts);
zio_nowait(zio_trim(zio, spa, vd, ts->ts_start,
ts->ts_end - ts->ts_start));
}
mutex_exit(&tm->tm_lock);
}
static int
zfs_sort_snaps(zfs_handle_t *zhp, void *data)
{
avl_tree_t *avl = data;
zfs_node_t *node;
zfs_node_t search;
search.zn_handle = zhp;
node = avl_find(avl, &search, NULL);
if (node) {
/*
* If this snapshot was renamed while we were creating the
* AVL tree, it's possible that we already inserted it under
* its old name. Remove the old handle before adding the new
* one.
*/
zfs_close(node->zn_handle);
avl_remove(avl, node);
free(node);
}
node = zfs_alloc(zhp->zfs_hdl, sizeof (zfs_node_t));
node->zn_handle = zhp;
avl_add(avl, node);
return (0);
}
void
storechar(tchar c, int row, int col) {
long s = cbits(c);
if (s != DASH && s != BAR) return;
if (bst_srch(&coords, XY2KEY(row, col), NULL))
if (avl_add(&coords, XY2KEY(row, col), BST_VAL(c)))
fprintf(stderr,
"BST: Unexpected internal error\n");
}
static void
trim_map_vdev_commit(spa_t *spa, zio_t *zio, vdev_t *vd)
{
trim_map_t *tm = vd->vdev_trimmap;
trim_seg_t *ts;
uint64_t size, offset, txgtarget, txgsafe;
int64_t hard, soft;
hrtime_t timelimit;
ASSERT(vd->vdev_ops->vdev_op_leaf);
if (tm == NULL)
return;
timelimit = gethrtime() - (hrtime_t)trim_timeout * NANOSEC;
if (vd->vdev_isl2cache) {
txgsafe = UINT64_MAX;
txgtarget = UINT64_MAX;
} else {
txgsafe = MIN(spa_last_synced_txg(spa), spa_freeze_txg(spa));
if (txgsafe > trim_txg_delay)
txgtarget = txgsafe - trim_txg_delay;
else
txgtarget = 0;
}
mutex_enter(&tm->tm_lock);
hard = 0;
if (tm->tm_pending > trim_vdev_max_pending)
hard = (tm->tm_pending - trim_vdev_max_pending) / 4;
soft = P2ROUNDUP(hard + tm->tm_pending / trim_timeout + 1, 64);
/* Loop until we have sent all outstanding free's */
while (soft > 0 &&
(ts = trim_map_first(tm, txgtarget, txgsafe, timelimit, hard > 0))
!= NULL) {
TRIM_MAP_REM(tm, ts);
avl_remove(&tm->tm_queued_frees, ts);
avl_add(&tm->tm_inflight_frees, ts);
size = ts->ts_end - ts->ts_start;
offset = ts->ts_start;
/*
* We drop the lock while we call zio_nowait as the IO
* scheduler can result in a different IO being run e.g.
* a write which would result in a recursive lock.
*/
mutex_exit(&tm->tm_lock);
zio_nowait(zio_trim(zio, spa, vd, offset, size));
soft -= TRIM_MAP_SEGS(size);
hard -= TRIM_MAP_SEGS(size);
mutex_enter(&tm->tm_lock);
}
mutex_exit(&tm->tm_lock);
}
void
char_open(void) {
char *b;
ssize_t s;
if (!(b = file2ram(FNTDIR "/devhtml/CHAR", &s))) exit(1);
while (1) {
char *w, *l;
size_t n;
int t;
if (!(s = lineskip(&b, s))) return;
if (!(w = get_word(&b, &s, &n, &t))) return;
if (!(l = get_line(&b, &s, NULL))) return;
if (n == 1)
avl_add(&chrdat, I2BST(*w), S2BST(l));
else if (n != 2 && !(t & ~1))
avl_add(&numdat, I2BST(atoi(w)), S2BST(l));
else
avl_add(&namdat, S2BST(w), S2BST(l));
}
}
static void
vdev_queue_io_add(vdev_queue_t *vq, zio_t *zio)
{
spa_t *spa = zio->io_spa;
avl_tree_t *qtt;
ASSERT(MUTEX_HELD(&vq->vq_lock));
ASSERT3U(zio->io_priority, <, ZIO_PRIORITY_NUM_QUEUEABLE);
avl_add(vdev_queue_class_tree(vq, zio->io_priority), zio);
qtt = vdev_queue_type_tree(vq, zio->io_type);
if (qtt)
avl_add(qtt, zio);
#ifdef illumos
mutex_enter(&spa->spa_iokstat_lock);
spa->spa_queue_stats[zio->io_priority].spa_queued++;
if (spa->spa_iokstat != NULL)
kstat_waitq_enter(spa->spa_iokstat->ks_data);
mutex_exit(&spa->spa_iokstat_lock);
#endif
}
/* ARGSUSED */
static int
zfsctl_snapdir_remove(vnode_t *dvp, char *name, vnode_t *cwd, cred_t *cr,
caller_context_t *ct, int flags)
{
zfsctl_snapdir_t *sdp = dvp->v_data;
zfs_snapentry_t *sep;
zfs_snapentry_t search;
zfsvfs_t *zfsvfs;
char snapname[MAXNAMELEN];
char real[MAXNAMELEN];
int err;
zfsvfs = dvp->v_vfsp->vfs_data;
ZFS_ENTER(zfsvfs);
if ((flags & FIGNORECASE) || zfsvfs->z_case == ZFS_CASE_INSENSITIVE) {
err = dmu_snapshot_realname(zfsvfs->z_os, name, real,
MAXNAMELEN, NULL);
if (err == 0) {
name = real;
} else if (err != ENOTSUP) {
ZFS_EXIT(zfsvfs);
return (err);
}
}
ZFS_EXIT(zfsvfs);
err = zfsctl_snapshot_zname(dvp, name, MAXNAMELEN, snapname);
if (!err)
err = zfs_secpolicy_destroy_perms(snapname, cr);
if (err)
return (err);
mutex_enter(&sdp->sd_lock);
search.se_name = name;
sep = avl_find(&sdp->sd_snaps, &search, NULL);
if (sep) {
avl_remove(&sdp->sd_snaps, sep);
err = zfsctl_unmount_snap(sep, MS_FORCE, cr);
if (err)
avl_add(&sdp->sd_snaps, sep);
else
err = dmu_objset_destroy(snapname, B_FALSE);
} else {
err = ENOENT;
}
mutex_exit(&sdp->sd_lock);
return (err);
}
static void
vdev_queue_pending_add(vdev_queue_t *vq, zio_t *zio)
{
spa_t *spa = zio->io_spa;
avl_add(&vq->vq_pending_tree, zio);
if (spa->spa_iokstat != NULL) {
mutex_enter(&spa->spa_iokstat_lock);
kstat_runq_enter(spa->spa_iokstat->ks_data);
mutex_exit(&spa->spa_iokstat_lock);
}
}
/*
* pppt_disable_svc
*
* clean up all existing sessions and deregister targets from STMF
*/
static void
pppt_disable_svc(void)
{
pppt_tgt_t *tgt, *next_tgt;
avl_tree_t delete_target_list;
ASSERT(pppt_global.global_svc_state == PSS_DISABLING);
avl_create(&delete_target_list,
pppt_tgt_avl_compare, sizeof (pppt_tgt_t),
offsetof(pppt_tgt_t, target_global_ln));
PPPT_GLOBAL_LOCK();
for (tgt = avl_first(&pppt_global.global_target_list);
tgt != NULL;
tgt = next_tgt) {
next_tgt = AVL_NEXT(&pppt_global.global_target_list, tgt);
avl_remove(&pppt_global.global_target_list, tgt);
avl_add(&delete_target_list, tgt);
pppt_tgt_async_delete(tgt);
}
PPPT_GLOBAL_UNLOCK();
for (tgt = avl_first(&delete_target_list);
tgt != NULL;
tgt = next_tgt) {
next_tgt = AVL_NEXT(&delete_target_list, tgt);
mutex_enter(&tgt->target_mutex);
while ((tgt->target_refcount > 0) ||
(tgt->target_state != TS_DELETING)) {
cv_wait(&tgt->target_cv, &tgt->target_mutex);
}
mutex_exit(&tgt->target_mutex);
avl_remove(&delete_target_list, tgt);
pppt_tgt_destroy(tgt);
}
taskq_destroy(pppt_global.global_sess_taskq);
taskq_destroy(pppt_global.global_dispatch_taskq);
avl_destroy(&pppt_global.global_sess_list);
avl_destroy(&pppt_global.global_target_list);
(void) stmf_deregister_port_provider(pppt_global.global_pp);
stmf_free(pppt_global.global_dbuf_store);
pppt_global.global_dbuf_store = NULL;
stmf_free(pppt_global.global_pp);
pppt_global.global_pp = NULL;
}
static void
vdev_queue_io_add(vdev_queue_t *vq, zio_t *zio)
{
spa_t *spa = zio->io_spa;
ASSERT3U(zio->io_priority, <, ZIO_PRIORITY_NUM_QUEUEABLE);
avl_add(&vq->vq_class[zio->io_priority].vqc_queued_tree, zio);
mutex_enter(&spa->spa_iokstat_lock);
spa->spa_queue_stats[zio->io_priority].spa_queued++;
if (spa->spa_iokstat != NULL)
kstat_waitq_enter(spa->spa_iokstat->ks_data);
mutex_exit(&spa->spa_iokstat_lock);
}
void
zcrypt_keychain_insert(avl_tree_t *keychain, uint64_t txg,
zcrypt_key_t *key)
{
zcrypt_keychain_node_t *dkn;
dkn = kmem_alloc(sizeof (zcrypt_keychain_node_t), KM_PUSHPAGE); //Sleep
dkn->dkn_txg = txg;
dkn->dkn_key = key;
avl_add(keychain, dkn);
}
static void
vdev_queue_pending_add(vdev_queue_t *vq, zio_t *zio)
{
spa_t *spa = zio->io_spa;
spa_stats_history_t *ssh = &spa->spa_stats.io_history;
avl_add(&vq->vq_pending_tree, zio);
if (ssh->kstat != NULL) {
mutex_enter(&ssh->lock);
kstat_runq_enter(ssh->kstat->ks_data);
mutex_exit(&ssh->lock);
}
}
/*
* Allocate an entry in the cache. At the point we don't have the data,
* we're just creating a placeholder so that multiple threads don't all
* go off and read the same blocks.
*/
static vdev_cache_entry_t *
vdev_cache_allocate(zio_t *zio)
{
vdev_cache_t *vc = &zio->io_vd->vdev_cache;
uint64_t offset = P2ALIGN(zio->io_offset, VCBS);
vdev_cache_entry_t *ve;
ASSERT(MUTEX_HELD(&vc->vc_lock));
if (zfs_vdev_cache_size == 0)
return (NULL);
/*
* If adding a new entry would exceed the cache size,
* evict the oldest entry (LRU).
*/
if ((avl_numnodes(&vc->vc_lastused_tree) << zfs_vdev_cache_bshift) >
zfs_vdev_cache_size) {
ve = avl_first(&vc->vc_lastused_tree);
if (ve->ve_fill_io != NULL) {
dprintf("can't evict in %p, still filling\n", vc);
return (NULL);
}
ASSERT(ve->ve_hits != 0);
vdev_cache_evict(vc, ve);
}
ve = kmem_zalloc(sizeof (vdev_cache_entry_t), KM_SLEEP);
ve->ve_offset = offset;
ve->ve_lastused = lbolt;
ve->ve_data = zio_buf_alloc(VCBS);
avl_add(&vc->vc_offset_tree, ve);
avl_add(&vc->vc_lastused_tree, ve);
return (ve);
}
static void
vdev_queue_pending_add(vdev_queue_t *vq, zio_t *zio)
{
spa_t *spa = zio->io_spa;
ASSERT(MUTEX_HELD(&vq->vq_lock));
ASSERT3U(zio->io_priority, <, ZIO_PRIORITY_NUM_QUEUEABLE);
vq->vq_class[zio->io_priority].vqc_active++;
avl_add(&vq->vq_active_tree, zio);
mutex_enter(&spa->spa_iokstat_lock);
spa->spa_queue_stats[zio->io_priority].spa_active++;
if (spa->spa_iokstat != NULL)
kstat_runq_enter(spa->spa_iokstat->ks_data);
mutex_exit(&spa->spa_iokstat_lock);
}
static void
mze_insert(zap_t *zap, int chunkid, uint64_t hash, mzap_ent_phys_t *mzep)
{
mzap_ent_t *mze;
ASSERT(zap->zap_ismicro);
ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
ASSERT(mzep->mze_cd < ZAP_MAXCD);
ASSERT3U(zap_hash(zap, mzep->mze_name), ==, hash);
mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP);
mze->mze_chunkid = chunkid;
mze->mze_hash = hash;
mze->mze_phys = *mzep;
avl_add(&zap->zap_m.zap_avl, mze);
}
static void
vdev_cache_hit(vdev_cache_t *vc, vdev_cache_entry_t *ve, zio_t *zio)
{
uint64_t cache_phase = P2PHASE(zio->io_offset, VCBS);
ASSERT(MUTEX_HELD(&vc->vc_lock));
ASSERT(ve->ve_fill_io == NULL);
if (ve->ve_lastused != lbolt) {
avl_remove(&vc->vc_lastused_tree, ve);
ve->ve_lastused = lbolt;
avl_add(&vc->vc_lastused_tree, ve);
}
ve->ve_hits++;
bcopy(ve->ve_data + cache_phase, zio->io_data, zio->io_size);
}
boolean_t
trim_map_write_start(zio_t *zio)
{
vdev_t *vd = zio->io_vd;
trim_map_t *tm = vd->vdev_trimmap;
trim_seg_t tsearch, *ts;
boolean_t left_over, right_over;
uint64_t start, end;
if (!zfs_trim_enabled || vd->vdev_notrim || tm == NULL)
return (B_TRUE);
start = zio->io_offset;
end = TRIM_ZIO_END(zio->io_vd, start, zio->io_size);
tsearch.ts_start = start;
tsearch.ts_end = end;
mutex_enter(&tm->tm_lock);
/*
* Checking for colliding in-flight frees.
*/
ts = avl_find(&tm->tm_inflight_frees, &tsearch, NULL);
if (ts != NULL) {
list_insert_tail(&tm->tm_pending_writes, zio);
mutex_exit(&tm->tm_lock);
return (B_FALSE);
}
ts = avl_find(&tm->tm_queued_frees, &tsearch, NULL);
if (ts != NULL) {
/*
* Loop until all overlapping segments are removed.
*/
do {
trim_map_segment_remove(tm, ts, start, end);
ts = avl_find(&tm->tm_queued_frees, &tsearch, NULL);
} while (ts != NULL);
}
avl_add(&tm->tm_inflight_writes, zio);
mutex_exit(&tm->tm_lock);
return (B_TRUE);
}
/**
* 向一个表索引中添加新的字段
* @param idx {ACL_MDT_IDX*} 表索引
* @param key {const char*} 数据表索引字段值
* @param rec {ACL_MDT_REC*}
* @return {ACL_HTABLE_INFO*}
*/
static void mdt_idx_add(ACL_MDT_IDX *idx, const char *key, ACL_MDT_REC *rec)
{
ACL_MDT_IDX_AVL *idx_avl = (ACL_MDT_IDX_AVL*) idx;
TREE_NODE *pnode;
if (idx_avl->slice)
pnode = (TREE_NODE*) acl_slice_alloc(idx_avl->slice);
else
pnode = (TREE_NODE*) acl_mymalloc(sizeof(TREE_NODE));
if (idx->flag & ACL_MDT_FLAG_KMR)
pnode->key.c_key = key;
else
pnode->key.key = acl_mystrdup(key);
pnode->rec = rec;
avl_add(&idx_avl->avl, pnode);
rec->key = pnode->key.c_key;
}
static void
vdev_queue_io_add(vdev_queue_t *vq, zio_t *zio)
{
#ifdef LINUX
spa_t *spa = zio->io_spa;
spa_stats_history_t *ssh = &spa->spa_stats.io_history;
#endif
ASSERT3U(zio->io_priority, <, ZIO_PRIORITY_NUM_QUEUEABLE);
avl_add(&vq->vq_class[zio->io_priority].vqc_queued_tree, zio);
#ifdef LINUX
if (ssh->kstat != NULL) {
mutex_enter(&ssh->lock);
kstat_waitq_enter(ssh->kstat->ks_data);
mutex_exit(&ssh->lock);
}
#endif
}
/*
* Add a copy of the string [s] to the container [zsp].
* Return 0 on success, or -1 on error.
*
* FIXME: Handle dup strings.
*/
int
zed_strings_add(zed_strings_t *zsp, const char *s)
{
size_t len;
zed_strings_node_t *np;
if (!zsp || !s) {
errno = EINVAL;
return (-1);
}
len = sizeof (zed_strings_node_t) + strlen(s) + 1;
np = malloc(len);
if (!np)
return (-1);
memset(np, 0, len);
assert((char *) np->string + strlen(s) < (char *) np + len);
(void) strcpy(np->string, s);
avl_add(&zsp->tree, np);
return (0);
}
static void
trim_map_vdev_commit(spa_t *spa, zio_t *zio, vdev_t *vd)
{
trim_map_t *tm = vd->vdev_trimmap;
trim_seg_t *ts;
uint64_t size, txgtarget, txgsafe;
hrtime_t timelimit;
ASSERT(vd->vdev_ops->vdev_op_leaf);
if (tm == NULL)
return;
timelimit = gethrtime() - trim_timeout * NANOSEC;
if (vd->vdev_isl2cache) {
txgsafe = UINT64_MAX;
txgtarget = UINT64_MAX;
} else {
txgsafe = MIN(spa_last_synced_txg(spa), spa_freeze_txg(spa));
if (txgsafe > trim_txg_delay)
txgtarget = txgsafe - trim_txg_delay;
else
txgtarget = 0;
}
mutex_enter(&tm->tm_lock);
/* Loop until we have sent all outstanding free's */
while ((ts = trim_map_first(tm, txgtarget, txgsafe, timelimit))
!= NULL) {
list_remove(&tm->tm_head, ts);
avl_remove(&tm->tm_queued_frees, ts);
avl_add(&tm->tm_inflight_frees, ts);
size = ts->ts_end - ts->ts_start;
zio_nowait(zio_trim(zio, spa, vd, ts->ts_start, size));
TRIM_MAP_SDEC(tm, size);
TRIM_MAP_QDEC(tm);
}
mutex_exit(&tm->tm_lock);
}
static
#endif
int
zfs_fuid_find_by_domain(zfsvfs_t *zfsvfs, const char *domain, char **retdomain,
dmu_tx_t *tx)
{
fuid_domain_t searchnode, *findnode;
avl_index_t loc;
/*
* If the dummy "nobody" domain then return an index of 0
* to cause the created FUID to be a standard POSIX id
* for the user nobody.
*/
if (domain[0] == '\0') {
*retdomain = "";
return (0);
}
searchnode.f_ksid = ksid_lookupdomain(domain);
if (retdomain) {
*retdomain = searchnode.f_ksid->kd_name;
}
if (!zfsvfs->z_fuid_loaded)
zfs_fuid_init(zfsvfs, tx);
rw_enter(&zfsvfs->z_fuid_lock, RW_READER);
findnode = avl_find(&zfsvfs->z_fuid_domain, &searchnode, &loc);
rw_exit(&zfsvfs->z_fuid_lock);
if (findnode) {
ksiddomain_rele(searchnode.f_ksid);
return (findnode->f_idx);
} else {
fuid_domain_t *domnode;
nvlist_t *nvp;
nvlist_t **fuids;
uint64_t retidx;
size_t nvsize = 0;
char *packed;
dmu_buf_t *db;
int i = 0;
domnode = kmem_alloc(sizeof (fuid_domain_t), KM_SLEEP);
domnode->f_ksid = searchnode.f_ksid;
rw_enter(&zfsvfs->z_fuid_lock, RW_WRITER);
retidx = domnode->f_idx = avl_numnodes(&zfsvfs->z_fuid_idx) + 1;
avl_add(&zfsvfs->z_fuid_domain, domnode);
avl_add(&zfsvfs->z_fuid_idx, domnode);
/*
* Now resync the on-disk nvlist.
*/
VERIFY(nvlist_alloc(&nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0);
domnode = avl_first(&zfsvfs->z_fuid_domain);
fuids = kmem_alloc(retidx * sizeof (void *), KM_SLEEP);
while (domnode) {
VERIFY(nvlist_alloc(&fuids[i],
NV_UNIQUE_NAME, KM_SLEEP) == 0);
VERIFY(nvlist_add_uint64(fuids[i], FUID_IDX,
domnode->f_idx) == 0);
VERIFY(nvlist_add_uint64(fuids[i],
FUID_OFFSET, 0) == 0);
VERIFY(nvlist_add_string(fuids[i++], FUID_DOMAIN,
domnode->f_ksid->kd_name) == 0);
domnode = AVL_NEXT(&zfsvfs->z_fuid_domain, domnode);
}
VERIFY(nvlist_add_nvlist_array(nvp, FUID_NVP_ARRAY,
fuids, retidx) == 0);
for (i = 0; i != retidx; i++)
nvlist_free(fuids[i]);
kmem_free(fuids, retidx * sizeof (void *));
VERIFY(nvlist_size(nvp, &nvsize, NV_ENCODE_XDR) == 0);
packed = kmem_alloc(nvsize, KM_SLEEP);
VERIFY(nvlist_pack(nvp, &packed, &nvsize,
NV_ENCODE_XDR, KM_SLEEP) == 0);
nvlist_free(nvp);
zfsvfs->z_fuid_size = nvsize;
dmu_write(zfsvfs->z_os, zfsvfs->z_fuid_obj, 0,
zfsvfs->z_fuid_size, packed, tx);
kmem_free(packed, zfsvfs->z_fuid_size);
VERIFY(0 == dmu_bonus_hold(zfsvfs->z_os, zfsvfs->z_fuid_obj,
FTAG, &db));
dmu_buf_will_dirty(db, tx);
*(uint64_t *)db->db_data = zfsvfs->z_fuid_size;
dmu_buf_rele(db, FTAG);
rw_exit(&zfsvfs->z_fuid_lock);
return (retidx);
}
}
/*
* Create a pseudo export entry
*
* This is an export entry that's created as the
* side-effect of a "real" export. As a part of
* a real export, the pathname to the export is
* checked to see if all the directory components
* are accessible via an NFSv4 client, i.e. are
* exported. If treeclimb_export() finds an unexported
* mountpoint along the path, then it calls this
* function to export it.
*
* This pseudo export differs from a real export in that
* it only allows read-only access. A "visible" list of
* directories is added to filter lookup and readdir results
* to only contain dirnames which lead to descendant shares.
*
* A visible list has a per-file-system scope. Any exportinfo
* struct (real or pseudo) can have a visible list as long as
* a) its export root is VROOT
* b) a descendant of the export root is shared
*/
struct exportinfo *
pseudo_exportfs(vnode_t *vp, fid_t *fid, struct exp_visible *vis_head,
struct exportdata *exdata)
{
struct exportinfo *exi;
struct exportdata *kex;
fsid_t fsid;
int vpathlen;
int i;
ASSERT(RW_WRITE_HELD(&exported_lock));
fsid = vp->v_vfsp->vfs_fsid;
exi = kmem_zalloc(sizeof (*exi), KM_SLEEP);
exi->exi_fsid = fsid;
exi->exi_fid = *fid;
exi->exi_vp = vp;
VN_HOLD(exi->exi_vp);
exi->exi_visible = vis_head;
exi->exi_count = 1;
exi->exi_volatile_dev = (vfssw[vp->v_vfsp->vfs_fstype].vsw_flag &
VSW_VOLATILEDEV) ? 1 : 0;
mutex_init(&exi->exi_lock, NULL, MUTEX_DEFAULT, NULL);
/*
* Build up the template fhandle
*/
exi->exi_fh.fh_fsid = fsid;
ASSERT(exi->exi_fid.fid_len <= sizeof (exi->exi_fh.fh_xdata));
exi->exi_fh.fh_xlen = exi->exi_fid.fid_len;
bcopy(exi->exi_fid.fid_data, exi->exi_fh.fh_xdata,
exi->exi_fid.fid_len);
exi->exi_fh.fh_len = sizeof (exi->exi_fh.fh_data);
kex = &exi->exi_export;
kex->ex_flags = EX_PSEUDO;
vpathlen = vp->v_path ? strlen(vp->v_path) : 0;
kex->ex_pathlen = vpathlen + strlen(PSEUDOFS_SUFFIX);
kex->ex_path = kmem_alloc(kex->ex_pathlen + 1, KM_SLEEP);
if (vpathlen)
(void) strcpy(kex->ex_path, vp->v_path);
(void) strcpy(kex->ex_path + vpathlen, PSEUDOFS_SUFFIX);
/* Transfer the secinfo data from exdata to this new pseudo node */
if (exdata)
srv_secinfo_exp2pseu(&exi->exi_export, exdata);
/*
* Initialize auth cache and auth cache lock
*/
for (i = 0; i < AUTH_TABLESIZE; i++) {
exi->exi_cache[i] = kmem_alloc(sizeof (avl_tree_t), KM_SLEEP);
avl_create(exi->exi_cache[i], nfsauth_cache_clnt_compar,
sizeof (struct auth_cache_clnt),
offsetof(struct auth_cache_clnt, authc_link));
}
rw_init(&exi->exi_cache_lock, NULL, RW_DEFAULT, NULL);
/*
* Insert the new entry at the front of the export list
*/
export_link(exi);
/*
* Initialize exi_id and exi_kstats
*/
exi->exi_id = exi_id_get_next();
avl_add(&exi_id_tree, exi);
exi->exi_kstats = exp_kstats_init(getzoneid(), exi->exi_id,
exi->exi_export.ex_path);
return (exi);
}
/*
* Given a list of directories to search, find all pools stored on disk. This
* includes partial pools which are not available to import. If no args are
* given (argc is 0), then the default directory (/dev/dsk) is searched.
* poolname or guid (but not both) are provided by the caller when trying
* to import a specific pool.
*/
static nvlist_t *
zpool_find_import_impl(libzfs_handle_t *hdl, importargs_t *iarg)
{
int i, dirs = iarg->paths;
struct dirent *dp;
char path[MAXPATHLEN];
char *end, **dir = iarg->path;
size_t pathleft;
nvlist_t *ret = NULL;
pool_list_t pools = { 0 };
pool_entry_t *pe, *penext;
vdev_entry_t *ve, *venext;
config_entry_t *ce, *cenext;
name_entry_t *ne, *nenext;
avl_tree_t slice_cache;
rdsk_node_t *slice;
void *cookie;
verify(iarg->poolname == NULL || iarg->guid == 0);
if (dirs == 0) {
#ifdef HAVE_LIBBLKID
/* Use libblkid to scan all device for their type */
if (zpool_find_import_blkid(hdl, &pools) == 0)
goto skip_scanning;
(void) zfs_error_fmt(hdl, EZFS_BADCACHE,
dgettext(TEXT_DOMAIN, "blkid failure falling back "
"to manual probing"));
#endif /* HAVE_LIBBLKID */
dir = zpool_default_import_path;
dirs = DEFAULT_IMPORT_PATH_SIZE;
}
/*
* Go through and read the label configuration information from every
* possible device, organizing the information according to pool GUID
* and toplevel GUID.
*/
for (i = 0; i < dirs; i++) {
taskq_t *t;
char rdsk[MAXPATHLEN];
int dfd;
boolean_t config_failed = B_FALSE;
DIR *dirp;
/* use realpath to normalize the path */
if (realpath(dir[i], path) == 0) {
/* it is safe to skip missing search paths */
if (errno == ENOENT)
continue;
zfs_error_aux(hdl, strerror(errno));
(void) zfs_error_fmt(hdl, EZFS_BADPATH,
dgettext(TEXT_DOMAIN, "cannot open '%s'"), dir[i]);
goto error;
}
end = &path[strlen(path)];
*end++ = '/';
*end = 0;
pathleft = &path[sizeof (path)] - end;
/*
* Using raw devices instead of block devices when we're
* reading the labels skips a bunch of slow operations during
* close(2) processing, so we replace /dev/dsk with /dev/rdsk.
*/
if (strcmp(path, ZFS_DISK_ROOTD) == 0)
(void) strlcpy(rdsk, ZFS_RDISK_ROOTD, sizeof (rdsk));
else
(void) strlcpy(rdsk, path, sizeof (rdsk));
if ((dfd = open(rdsk, O_RDONLY)) < 0 ||
(dirp = fdopendir(dfd)) == NULL) {
if (dfd >= 0)
(void) close(dfd);
zfs_error_aux(hdl, strerror(errno));
(void) zfs_error_fmt(hdl, EZFS_BADPATH,
dgettext(TEXT_DOMAIN, "cannot open '%s'"),
rdsk);
goto error;
}
avl_create(&slice_cache, slice_cache_compare,
sizeof (rdsk_node_t), offsetof(rdsk_node_t, rn_node));
/*
* This is not MT-safe, but we have no MT consumers of libzfs
*/
while ((dp = readdir(dirp)) != NULL) {
const char *name = dp->d_name;
if (name[0] == '.' &&
(name[1] == 0 || (name[1] == '.' && name[2] == 0)))
continue;
slice = zfs_alloc(hdl, sizeof (rdsk_node_t));
slice->rn_name = zfs_strdup(hdl, name);
slice->rn_avl = &slice_cache;
slice->rn_dfd = dfd;
slice->rn_hdl = hdl;
slice->rn_nozpool = B_FALSE;
avl_add(&slice_cache, slice);
}
/*
* create a thread pool to do all of this in parallel;
* rn_nozpool is not protected, so this is racy in that
* multiple tasks could decide that the same slice can
* not hold a zpool, which is benign. Also choose
* double the number of processors; we hold a lot of
* locks in the kernel, so going beyond this doesn't
* buy us much.
*/
t = taskq_create("z_import", 2 * max_ncpus, defclsyspri,
2 * max_ncpus, INT_MAX, TASKQ_PREPOPULATE);
for (slice = avl_first(&slice_cache); slice;
(slice = avl_walk(&slice_cache, slice,
AVL_AFTER)))
(void) taskq_dispatch(t, zpool_open_func, slice,
TQ_SLEEP);
taskq_wait(t);
taskq_destroy(t);
cookie = NULL;
while ((slice = avl_destroy_nodes(&slice_cache,
&cookie)) != NULL) {
if (slice->rn_config != NULL && !config_failed) {
nvlist_t *config = slice->rn_config;
boolean_t matched = B_TRUE;
if (iarg->poolname != NULL) {
char *pname;
matched = nvlist_lookup_string(config,
ZPOOL_CONFIG_POOL_NAME,
&pname) == 0 &&
strcmp(iarg->poolname, pname) == 0;
} else if (iarg->guid != 0) {
uint64_t this_guid;
matched = nvlist_lookup_uint64(config,
ZPOOL_CONFIG_POOL_GUID,
&this_guid) == 0 &&
iarg->guid == this_guid;
}
if (!matched) {
nvlist_free(config);
} else {
/*
* use the non-raw path for the config
*/
(void) strlcpy(end, slice->rn_name,
pathleft);
if (add_config(hdl, &pools, path, i+1,
slice->rn_num_labels, config) != 0)
config_failed = B_TRUE;
}
}
free(slice->rn_name);
free(slice);
}
avl_destroy(&slice_cache);
(void) closedir(dirp);
if (config_failed)
goto error;
}
#ifdef HAVE_LIBBLKID
skip_scanning:
#endif
ret = get_configs(hdl, &pools, iarg->can_be_active, iarg->policy);
error:
for (pe = pools.pools; pe != NULL; pe = penext) {
penext = pe->pe_next;
for (ve = pe->pe_vdevs; ve != NULL; ve = venext) {
venext = ve->ve_next;
for (ce = ve->ve_configs; ce != NULL; ce = cenext) {
cenext = ce->ce_next;
if (ce->ce_config)
nvlist_free(ce->ce_config);
free(ce);
}
free(ve);
}
free(pe);
}
for (ne = pools.names; ne != NULL; ne = nenext) {
nenext = ne->ne_next;
free(ne->ne_name);
free(ne);
}
return (ret);
}
/* New session */
pppt_sess_t *
pppt_sess_lookup_create(scsi_devid_desc_t *lport_devid,
scsi_devid_desc_t *rport_devid, stmf_remote_port_t *rport,
uint64_t session_id, stmf_status_t *statusp)
{
pppt_tgt_t *tgt;
pppt_sess_t *ps;
stmf_scsi_session_t *ss;
pppt_sess_t tmp_ps;
stmf_scsi_session_t tmp_ss;
*statusp = STMF_SUCCESS;
PPPT_GLOBAL_LOCK();
/*
* Look for existing session for this ID
*/
ps = pppt_sess_lookup_locked(session_id, lport_devid, rport);
if (ps != NULL) {
PPPT_GLOBAL_UNLOCK();
return (ps);
}
/*
* No session with that ID, look for another session corresponding
* to the same IT nexus.
*/
tgt = pppt_tgt_lookup_locked(lport_devid);
if (tgt == NULL) {
*statusp = STMF_NOT_FOUND;
PPPT_GLOBAL_UNLOCK();
return (NULL);
}
mutex_enter(&tgt->target_mutex);
if (tgt->target_state != TS_STMF_ONLINE) {
*statusp = STMF_NOT_FOUND;
mutex_exit(&tgt->target_mutex);
PPPT_GLOBAL_UNLOCK();
/* Can't create session to offline target */
return (NULL);
}
bzero(&tmp_ps, sizeof (tmp_ps));
bzero(&tmp_ss, sizeof (tmp_ss));
tmp_ps.ps_stmf_sess = &tmp_ss;
tmp_ss.ss_rport = rport;
/*
* Look for an existing session on this IT nexus
*/
ps = avl_find(&tgt->target_sess_list, &tmp_ps, NULL);
if (ps != NULL) {
/*
* Now check the session ID. It should not match because if
* it did we would have found it on the global session list.
* If the session ID in the command is higher than the existing
* session ID then we need to tear down the existing session.
*/
mutex_enter(&ps->ps_mutex);
ASSERT(ps->ps_session_id != session_id);
if (ps->ps_session_id > session_id) {
/* Invalid session ID */
mutex_exit(&ps->ps_mutex);
mutex_exit(&tgt->target_mutex);
PPPT_GLOBAL_UNLOCK();
*statusp = STMF_INVALID_ARG;
return (NULL);
} else {
/* Existing session needs to be invalidated */
if (!ps->ps_closed) {
pppt_sess_close_locked(ps);
}
}
mutex_exit(&ps->ps_mutex);
/* Fallthrough and create new session */
}
/*
* Allocate and fill in pppt_session_t with the appropriate data
* for the protocol.
*/
ps = kmem_zalloc(sizeof (*ps), KM_SLEEP);
/* Fill in session fields */
ps->ps_target = tgt;
ps->ps_session_id = session_id;
ss = stmf_alloc(STMF_STRUCT_SCSI_SESSION, 0,
0);
if (ss == NULL) {
mutex_exit(&tgt->target_mutex);
PPPT_GLOBAL_UNLOCK();
kmem_free(ps, sizeof (*ps));
*statusp = STMF_ALLOC_FAILURE;
return (NULL);
}
ss->ss_rport_id = kmem_zalloc(sizeof (scsi_devid_desc_t) +
rport_devid->ident_length + 1, KM_SLEEP);
bcopy(rport_devid, ss->ss_rport_id,
sizeof (scsi_devid_desc_t) + rport_devid->ident_length + 1);
ss->ss_lport = tgt->target_stmf_lport;
ss->ss_rport = stmf_remote_port_alloc(rport->rport_tptid_sz);
bcopy(rport->rport_tptid, ss->ss_rport->rport_tptid,
rport->rport_tptid_sz);
if (stmf_register_scsi_session(tgt->target_stmf_lport, ss) !=
STMF_SUCCESS) {
mutex_exit(&tgt->target_mutex);
PPPT_GLOBAL_UNLOCK();
kmem_free(ss->ss_rport_id,
sizeof (scsi_devid_desc_t) + rport_devid->ident_length + 1);
stmf_remote_port_free(ss->ss_rport);
stmf_free(ss);
kmem_free(ps, sizeof (*ps));
*statusp = STMF_TARGET_FAILURE;
return (NULL);
}
ss->ss_port_private = ps;
mutex_init(&ps->ps_mutex, NULL, MUTEX_DEFAULT, NULL);
cv_init(&ps->ps_cv, NULL, CV_DEFAULT, NULL);
avl_create(&ps->ps_task_list, pppt_task_avl_compare,
sizeof (pppt_task_t), offsetof(pppt_task_t, pt_sess_ln));
ps->ps_refcnt = 1;
ps->ps_stmf_sess = ss;
avl_add(&tgt->target_sess_list, ps);
avl_add(&pppt_global.global_sess_list, ps);
mutex_exit(&tgt->target_mutex);
PPPT_GLOBAL_UNLOCK();
stmf_trace("pppt", "New session %p", (void *)ps);
return (ps);
}
int
zfsctl_mount_snapshot(struct path *path, int flags)
{
struct dentry *dentry = path->dentry;
struct inode *ip = dentry->d_inode;
zfs_sb_t *zsb = ITOZSB(ip);
char *full_name, *full_path;
zfs_snapentry_t *sep;
zfs_snapentry_t search;
char *argv[] = { "/bin/sh", "-c", NULL, NULL };
char *envp[] = { NULL };
int error;
ZFS_ENTER(zsb);
full_name = kmem_zalloc(MAXNAMELEN, KM_SLEEP);
full_path = kmem_zalloc(PATH_MAX, KM_SLEEP);
error = zfsctl_snapshot_zname(ip, dname(dentry), MAXNAMELEN, full_name);
if (error)
goto error;
error = zfsctl_snapshot_zpath(path, PATH_MAX, full_path);
if (error)
goto error;
/*
* Attempt to mount the snapshot from user space. Normally this
* would be done using the vfs_kern_mount() function, however that
* function is marked GPL-only and cannot be used. On error we
* careful to log the real error to the console and return EISDIR
* to safely abort the automount. This should be very rare.
*/
argv[2] = kmem_asprintf(SET_MOUNT_CMD, full_name, full_path);
error = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC);
strfree(argv[2]);
if (error) {
printk("ZFS: Unable to automount %s at %s: %d\n",
full_name, full_path, error);
error = EISDIR;
goto error;
}
mutex_enter(&zsb->z_ctldir_lock);
/*
* Ensure a previous entry does not exist, if it does safely remove
* it any cancel the outstanding expiration. This can occur when a
* snapshot is manually unmounted and then an automount is triggered.
*/
search.se_name = full_name;
sep = avl_find(&zsb->z_ctldir_snaps, &search, NULL);
if (sep) {
avl_remove(&zsb->z_ctldir_snaps, sep);
taskq_cancel_id(zfs_expire_taskq, sep->se_taskqid);
zfsctl_sep_free(sep);
}
sep = zfsctl_sep_alloc();
sep->se_name = full_name;
sep->se_path = full_path;
sep->se_inode = ip;
avl_add(&zsb->z_ctldir_snaps, sep);
sep->se_taskqid = taskq_dispatch_delay(zfs_expire_taskq,
zfsctl_expire_snapshot, sep, TQ_SLEEP,
ddi_get_lbolt() + zfs_expire_snapshot * HZ);
mutex_exit(&zsb->z_ctldir_lock);
error:
if (error) {
kmem_free(full_name, MAXNAMELEN);
kmem_free(full_path, PATH_MAX);
}
ZFS_EXIT(zsb);
return (error);
}
