static void fifo_reinit_vp(vnode_t *vp)
{
vn_reinit(vp);
vp->v_type = VFIFO;
vp->v_flag &= VROOT;
vp->v_flag |= VNOMAP | VNOSWAP;
}
vnode_t *
vn_alloc(int kmflag)
{
vnode_t *vp;
vp = kmem_cache_alloc(vn_cache, kmflag);
if (vp != NULL) {
vn_reinit(vp);
}
return (vp);
}
int
zfs_create_share_dir(zfs_sb_t *zsb, dmu_tx_t *tx)
{
#ifdef HAVE_SMB_SHARE
zfs_acl_ids_t acl_ids;
vattr_t vattr;
znode_t *sharezp;
vnode_t *vp;
znode_t *zp;
int error;
vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
vattr.va_mode = S_IFDIR | 0555;
vattr.va_uid = crgetuid(kcred);
vattr.va_gid = crgetgid(kcred);
sharezp = kmem_cache_alloc(znode_cache, KM_SLEEP);
sharezp->z_moved = 0;
sharezp->z_unlinked = 0;
sharezp->z_atime_dirty = 0;
sharezp->z_zfsvfs = zfsvfs;
sharezp->z_is_sa = zfsvfs->z_use_sa;
vp = ZTOV(sharezp);
vn_reinit(vp);
vp->v_type = VDIR;
VERIFY(0 == zfs_acl_ids_create(sharezp, IS_ROOT_NODE, &vattr,
kcred, NULL, &acl_ids));
zfs_mknode(sharezp, &vattr, tx, kcred, IS_ROOT_NODE, &zp, &acl_ids);
ASSERT3P(zp, ==, sharezp);
ASSERT(!vn_in_dnlc(ZTOV(sharezp))); /* not valid to move */
POINTER_INVALIDATE(&sharezp->z_zfsvfs);
error = zap_add(zfsvfs->z_os, MASTER_NODE_OBJ,
ZFS_SHARES_DIR, 8, 1, &sharezp->z_id, tx);
zfsvfs->z_shares_dir = sharezp->z_id;
zfs_acl_ids_free(&acl_ids);
// ZTOV(sharezp)->v_count = 0;
sa_handle_destroy(sharezp->z_sa_hdl);
kmem_cache_free(znode_cache, sharezp);
return (error);
#else
return (0);
#endif /* HAVE_SMB_SHARE */
}
vnode_t *vn_alloc(int kmflag)
{
ASSERT(kmflag == 0 || kmflag == UMEM_NOFAIL);
vnode_t *vp;
vp = kmem_cache_alloc(vnode_cache, kmflag);
/* taken from vn_cache_constructor */
mutex_init(&vp->v_lock, NULL, MUTEX_DEFAULT, NULL);
rwst_init(&vp->v_vfsmhlock.ve_lock, NULL, RW_DEFAULT, NULL);
if(vp != NULL) {
vp->v_path = NULL;
vp->v_data = NULL;
vn_reinit(vp);
}
/*fprintf(stderr, "VNode %p alloc'ed\n", vp);*/
return vp;
}
/*
* Allocate a new lxproc node
*
* This also allocates the vnode associated with it
*/
lxpr_node_t *
lxpr_getnode(vnode_t *dp, lxpr_nodetype_t type, proc_t *p, int fd)
{
lxpr_node_t *lxpnp;
vnode_t *vp;
user_t *up;
timestruc_t now;
/*
* Allocate a new node. It is deallocated in vop_innactive
*/
lxpnp = kmem_cache_alloc(lxpr_node_cache, KM_SLEEP);
/*
* Set defaults (may be overridden below)
*/
gethrestime(&now);
lxpnp->lxpr_type = type;
lxpnp->lxpr_realvp = NULL;
lxpnp->lxpr_parent = dp;
VN_HOLD(dp);
if (p != NULL) {
lxpnp->lxpr_pid = ((p->p_pid ==
curproc->p_zone->zone_proc_initpid) ? 1 : p->p_pid);
lxpnp->lxpr_time = PTOU(p)->u_start;
lxpnp->lxpr_uid = crgetruid(p->p_cred);
lxpnp->lxpr_gid = crgetrgid(p->p_cred);
lxpnp->lxpr_ino = lxpr_inode(type, p->p_pid, fd);
} else {
/* Pretend files without a proc belong to sched */
lxpnp->lxpr_pid = 0;
lxpnp->lxpr_time = now;
lxpnp->lxpr_uid = lxpnp->lxpr_gid = 0;
lxpnp->lxpr_ino = lxpr_inode(type, 0, 0);
}
/* initialize the vnode data */
vp = lxpnp->lxpr_vnode;
vn_reinit(vp);
vp->v_flag = VNOCACHE|VNOMAP|VNOSWAP|VNOMOUNT;
vp->v_vfsp = dp->v_vfsp;
/*
* Do node specific stuff
*/
switch (type) {
case LXPR_PROCDIR:
vp->v_flag |= VROOT;
vp->v_type = VDIR;
lxpnp->lxpr_mode = 0555; /* read-search by everyone */
break;
case LXPR_PID_CURDIR:
ASSERT(p != NULL);
/*
* Zombie check. p_stat is officially protected by pidlock,
* but we can't grab pidlock here because we already hold
* p_lock. Luckily if we look at the process exit code
* we see that p_stat only transisions from SRUN to SZOMB
* while p_lock is held. Aside from this, the only other
* p_stat transition that we need to be aware about is
* SIDL to SRUN, but that's not a problem since lxpr_lock()
* ignores nodes in the SIDL state so we'll never get a node
* that isn't already in the SRUN state.
*/
if (p->p_stat == SZOMB) {
lxpnp->lxpr_realvp = NULL;
} else {
up = PTOU(p);
lxpnp->lxpr_realvp = up->u_cdir;
ASSERT(lxpnp->lxpr_realvp != NULL);
VN_HOLD(lxpnp->lxpr_realvp);
}
vp->v_type = VLNK;
lxpnp->lxpr_mode = 0777; /* anyone does anything ! */
break;
case LXPR_PID_ROOTDIR:
ASSERT(p != NULL);
/* Zombie check. see locking comment above */
if (p->p_stat == SZOMB) {
lxpnp->lxpr_realvp = NULL;
} else {
up = PTOU(p);
lxpnp->lxpr_realvp =
up->u_rdir != NULL ? up->u_rdir : rootdir;
ASSERT(lxpnp->lxpr_realvp != NULL);
VN_HOLD(lxpnp->lxpr_realvp);
}
vp->v_type = VLNK;
lxpnp->lxpr_mode = 0777; /* anyone does anything ! */
break;
case LXPR_PID_EXE:
ASSERT(p != NULL);
lxpnp->lxpr_realvp = p->p_exec;
if (lxpnp->lxpr_realvp != NULL) {
VN_HOLD(lxpnp->lxpr_realvp);
}
vp->v_type = VLNK;
lxpnp->lxpr_mode = 0777;
break;
case LXPR_SELF:
vp->v_type = VLNK;
lxpnp->lxpr_mode = 0777; /* anyone does anything ! */
break;
case LXPR_PID_FD_FD:
ASSERT(p != NULL);
/* lxpr_realvp is set after we return */
vp->v_type = VLNK;
lxpnp->lxpr_mode = 0700; /* read-write-exe owner only */
break;
case LXPR_PID_FDDIR:
ASSERT(p != NULL);
vp->v_type = VDIR;
lxpnp->lxpr_mode = 0500; /* read-search by owner only */
break;
case LXPR_PIDDIR:
ASSERT(p != NULL);
vp->v_type = VDIR;
lxpnp->lxpr_mode = 0511;
break;
case LXPR_SYSDIR:
case LXPR_SYS_FSDIR:
case LXPR_SYS_FS_INOTIFYDIR:
case LXPR_SYS_KERNELDIR:
case LXPR_NETDIR:
vp->v_type = VDIR;
lxpnp->lxpr_mode = 0555; /* read-search by all */
break;
case LXPR_PID_ENV:
case LXPR_PID_MEM:
ASSERT(p != NULL);
/*FALLTHRU*/
case LXPR_KCORE:
vp->v_type = VREG;
lxpnp->lxpr_mode = 0400; /* read-only by owner only */
break;
default:
vp->v_type = VREG;
lxpnp->lxpr_mode = 0444; /* read-only by all */
break;
}
return (lxpnp);
}
/*
* Construct a new znode/vnode and intialize.
*
* This does not do a call to dmu_set_user() that is
* up to the caller to do, in case you don't want to
* return the znode
*/
static znode_t *
zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, int blksz)
{
znode_t *zp;
vnode_t *vp;
zp = kmem_cache_alloc(znode_cache, KM_SLEEP);
zfs_znode_cache_constructor(zp, zfsvfs->z_parent->z_vfs, 0);
ASSERT(zp->z_dirlocks == NULL);
ASSERT(zp->z_dbuf == NULL);
ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
/*
* Defer setting z_zfsvfs until the znode is ready to be a candidate for
* the zfs_znode_move() callback.
*/
zp->z_phys = NULL;
zp->z_unlinked = 0;
zp->z_atime_dirty = 0;
zp->z_mapcnt = 0;
zp->z_last_itx = 0;
zp->z_id = db->db_object;
zp->z_blksz = blksz;
zp->z_seq = 0x7A4653;
zp->z_sync_cnt = 0;
vp = ZTOV(zp);
#ifdef TODO
vn_reinit(vp);
#endif
zfs_znode_dmu_init(zfsvfs, zp, db);
zp->z_gen = zp->z_phys->zp_gen;
#if 0
if (vp == NULL)
return (zp);
#endif
vp->v_type = IFTOVT((mode_t)zp->z_phys->zp_mode);
switch (vp->v_type) {
case VDIR:
zp->z_zn_prefetch = B_TRUE; /* z_prefetch default is enabled */
break;
case VFIFO:
vp->v_op = &zfs_fifoops;
break;
}
if (vp->v_type != VFIFO)
VN_LOCK_ASHARE(vp);
mutex_enter(&zfsvfs->z_znodes_lock);
list_insert_tail(&zfsvfs->z_all_znodes, zp);
membar_producer();
/*
* Everything else must be valid before assigning z_zfsvfs makes the
* znode eligible for zfs_znode_move().
*/
zp->z_zfsvfs = zfsvfs;
mutex_exit(&zfsvfs->z_znodes_lock);
VFS_HOLD(zfsvfs->z_vfs);
return (zp);
}
static vnode_t *
make_rnode4(nfs4_sharedfh_t *fh, r4hashq_t *rhtp, struct vfs *vfsp,
struct vnodeops *vops,
int (*putapage)(vnode_t *, page_t *, u_offset_t *, size_t *, int, cred_t *),
int *newnode, cred_t *cr)
{
rnode4_t *rp;
rnode4_t *trp;
vnode_t *vp;
mntinfo4_t *mi;
ASSERT(RW_READ_HELD(&rhtp->r_lock));
mi = VFTOMI4(vfsp);
start:
if ((rp = r4find(rhtp, fh, vfsp)) != NULL) {
vp = RTOV4(rp);
*newnode = 0;
return (vp);
}
rw_exit(&rhtp->r_lock);
mutex_enter(&rp4freelist_lock);
if (rp4freelist != NULL && rnode4_new >= nrnode) {
rp = rp4freelist;
rp4_rmfree(rp);
mutex_exit(&rp4freelist_lock);
vp = RTOV4(rp);
if (rp->r_flags & R4HASHED) {
rw_enter(&rp->r_hashq->r_lock, RW_WRITER);
mutex_enter(&vp->v_lock);
if (vp->v_count > 1) {
vp->v_count--;
mutex_exit(&vp->v_lock);
rw_exit(&rp->r_hashq->r_lock);
rw_enter(&rhtp->r_lock, RW_READER);
goto start;
}
mutex_exit(&vp->v_lock);
rp4_rmhash_locked(rp);
rw_exit(&rp->r_hashq->r_lock);
}
r4inactive(rp, cr);
mutex_enter(&vp->v_lock);
if (vp->v_count > 1) {
vp->v_count--;
mutex_exit(&vp->v_lock);
rw_enter(&rhtp->r_lock, RW_READER);
goto start;
}
mutex_exit(&vp->v_lock);
vn_invalid(vp);
/*
* destroy old locks before bzero'ing and
* recreating the locks below.
*/
uninit_rnode4(rp);
/*
* Make sure that if rnode is recycled then
* VFS count is decremented properly before
* reuse.
*/
VFS_RELE(vp->v_vfsp);
vn_reinit(vp);
} else {
vnode_t *new_vp;
mutex_exit(&rp4freelist_lock);
rp = kmem_cache_alloc(rnode4_cache, KM_SLEEP);
new_vp = vn_alloc(KM_SLEEP);
atomic_add_long((ulong_t *)&rnode4_new, 1);
#ifdef DEBUG
clstat4_debug.nrnode.value.ui64++;
#endif
vp = new_vp;
}
bzero(rp, sizeof (*rp));
rp->r_vnode = vp;
nfs_rw_init(&rp->r_rwlock, NULL, RW_DEFAULT, NULL);
nfs_rw_init(&rp->r_lkserlock, NULL, RW_DEFAULT, NULL);
mutex_init(&rp->r_svlock, NULL, MUTEX_DEFAULT, NULL);
mutex_init(&rp->r_statelock, NULL, MUTEX_DEFAULT, NULL);
mutex_init(&rp->r_statev4_lock, NULL, MUTEX_DEFAULT, NULL);
mutex_init(&rp->r_os_lock, NULL, MUTEX_DEFAULT, NULL);
rp->created_v4 = 0;
list_create(&rp->r_open_streams, sizeof (nfs4_open_stream_t),
offsetof(nfs4_open_stream_t, os_node));
rp->r_lo_head.lo_prev_rnode = &rp->r_lo_head;
rp->r_lo_head.lo_next_rnode = &rp->r_lo_head;
cv_init(&rp->r_cv, NULL, CV_DEFAULT, NULL);
cv_init(&rp->r_commit.c_cv, NULL, CV_DEFAULT, NULL);
rp->r_flags = R4READDIRWATTR;
rp->r_fh = fh;
rp->r_hashq = rhtp;
sfh4_hold(rp->r_fh);
rp->r_server = mi->mi_curr_serv;
rp->r_deleg_type = OPEN_DELEGATE_NONE;
rp->r_deleg_needs_recovery = OPEN_DELEGATE_NONE;
nfs_rw_init(&rp->r_deleg_recall_lock, NULL, RW_DEFAULT, NULL);
rddir4_cache_create(rp);
rp->r_putapage = putapage;
vn_setops(vp, vops);
vp->v_data = (caddr_t)rp;
vp->v_vfsp = vfsp;
VFS_HOLD(vfsp);
vp->v_type = VNON;
if (isrootfh(fh, rp))
vp->v_flag = VROOT;
vn_exists(vp);
/*
* There is a race condition if someone else
* alloc's the rnode while no locks are held, so we
* check again and recover if found.
*/
rw_enter(&rhtp->r_lock, RW_WRITER);
if ((trp = r4find(rhtp, fh, vfsp)) != NULL) {
vp = RTOV4(trp);
*newnode = 0;
rw_exit(&rhtp->r_lock);
rp4_addfree(rp, cr);
rw_enter(&rhtp->r_lock, RW_READER);
return (vp);
}
rp4_addhash(rp);
*newnode = 1;
return (vp);
}
