/*ARGSUSED7*/
static int
xmem_create(struct vnode *dvp, char *nm, struct vattr *vap,
enum vcexcl exclusive, int mode, struct vnode **vpp, struct cred *cred,
int flag)
{
struct xmemnode *parent;
struct xmount *xm;
struct xmemnode *self;
int error;
struct xmemnode *oldxp;
again:
parent = (struct xmemnode *)VTOXN(dvp);
xm = (struct xmount *)VTOXM(dvp);
self = NULL;
error = 0;
oldxp = NULL;
if (vap->va_type == VREG && (vap->va_mode & VSVTX)) {
/* Must be privileged to set sticky bit */
if (secpolicy_vnode_stky_modify(cred) != 0)
vap->va_mode &= ~VSVTX;
} else if (vap->va_type == VNON) {
return (EINVAL);
}
/*
* Null component name is a synonym for directory being searched.
*/
if (*nm == '\0') {
VN_HOLD(dvp);
oldxp = parent;
} else {
error = xdirlookup(parent, nm, &oldxp, cred);
}
if (error == 0) { /* name found */
ASSERT(oldxp);
rw_enter(&oldxp->xn_rwlock, RW_WRITER);
/*
* if create/read-only an existing
* directory, allow it
*/
if (exclusive == EXCL)
error = EEXIST;
else if ((oldxp->xn_type == VDIR) && (mode & VWRITE))
error = EISDIR;
else {
error = xmem_xaccess(oldxp, mode, cred);
}
if (error) {
rw_exit(&oldxp->xn_rwlock);
xmemnode_rele(oldxp);
return (error);
}
*vpp = XNTOV(oldxp);
if ((*vpp)->v_type == VREG && (vap->va_mask & AT_SIZE) &&
vap->va_size == 0) {
rw_enter(&oldxp->xn_contents, RW_WRITER);
(void) xmemnode_trunc(xm, oldxp, 0);
rw_exit(&oldxp->xn_contents);
}
rw_exit(&oldxp->xn_rwlock);
if (IS_DEVVP(*vpp)) {
struct vnode *newvp;
newvp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type,
cred);
VN_RELE(*vpp);
*vpp = newvp;
}
return (0);
}
if (error != ENOENT)
return (error);
rw_enter(&parent->xn_rwlock, RW_WRITER);
error = xdirenter(xm, parent, nm, DE_CREATE,
(struct xmemnode *)NULL, (struct xmemnode *)NULL,
vap, &self, cred);
rw_exit(&parent->xn_rwlock);
if (error) {
if (self)
xmemnode_rele(self);
if (error == EEXIST) {
/*
* This means that the file was created sometime
* after we checked and did not find it and when
* we went to create it.
* Since creat() is supposed to truncate a file
* that already exits go back to the begining
* of the function. This time we will find it
* and go down the xmem_trunc() path
*/
goto again;
}
return (error);
}
*vpp = XNTOV(self);
if (IS_DEVVP(*vpp)) {
struct vnode *newvp;
newvp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type,
cred);
VN_RELE(*vpp);
*vpp = newvp;
}
return (0);
}
/* ARGSUSED7 */
int /* ERRNO if error, 0 if successful. */
sam_create_ino(
sam_node_t *pip, /* pointer to parent directory inode. */
char *cp, /* pointer to the component name to create. */
vattr_t *vap, /* vattr ptr for type & mode information. */
vcexcl_t ex, /* exclusive create flag. */
int mode, /* file mode information. */
vnode_t **vpp, /* pointer pointer to returned vnode. */
cred_t *credp, /* credentials pointer. */
int filemode) /* open file mode */
{
int error = 0;
sam_node_t *ip;
struct sam_name name; /* If no entry, slot info is returned here */
int trans_size;
int issync;
int truncflag = 0;
int terr = 0;
#ifdef LQFS_TODO_LOCKFS
struct ulockfs *ulp;
#endif /* LQFS_TODO_LOCKFS */
/*
* Cannot set sticky bit unless superuser.
*/
if ((vap->va_mode & VSVTX) && secpolicy_vnode_stky_modify(credp)) {
vap->va_mode &= ~VSVTX;
}
lookup_name:
#ifdef LQFS_TODO_LOCKFS
error = qfs_lockfs_begin(pip->mp, &ulp, ULOCKFS_CREATE_MASK);
if (error) {
return (error);
}
if (ulp) {
#endif /* LQFS_TODO_LOCKFS */
/* Start LQFS create transaction */
trans_size = (int)TOP_CREATE_SIZE(pip);
TRANS_BEGIN_CSYNC(pip->mp, issync, TOP_CREATE, trans_size);
#ifdef LQFS_TODO_LOCKFS
}
#endif /* LQFS_TODO_LOCKFS */
RW_LOCK_OS(&pip->data_rwl, RW_WRITER);
name.operation = SAM_CREATE;
if ((error = sam_lookup_name(pip, cp, &ip, &name, credp)) == ENOENT) {
if (((error = sam_create_name(pip, cp, &ip, &name,
vap, credp)) != 0) &&
IS_SAM_ENOSPC(error)) {
RW_UNLOCK_OS(&pip->data_rwl, RW_WRITER);
/*
* Temporarily end LQFS create transaction
*/
#ifdef LQFS_TODO_LOCKFS
if (ulp) {
#endif /* LQFS_TODO_LOCKFS */
TRANS_END_CSYNC(pip->mp, terr, issync,
TOP_CREATE, trans_size);
#ifdef LQFS_TODO_LOCKFS
}
#endif /* LQFS_TODO_LOCKFS */
error = sam_wait_space(pip, error);
if (error == 0) {
error = terr;
}
if (error) {
return (error);
}
goto lookup_name;
}
RW_UNLOCK_OS(&pip->data_rwl, RW_WRITER);
} else if (error == 0) { /* If entry already exists. */
RW_UNLOCK_OS(&pip->data_rwl, RW_WRITER);
error = EEXIST;
if (ex == NONEXCL) { /* If non-exclusive create */
if ((S_ISDIR(ip->di.mode) ||
S_ISATTRDIR(ip->di.mode)) &&
(mode & S_IWRITE)) {
/* Cannot create over an existing dir. */
error = EISDIR;
} else if (SAM_PRIVILEGE_INO(ip->di.version,
ip->di.id.ino)) {
/* Cannot create over privileged inodes */
error = EPERM;
} else if (mode) { /* Check mode if set */
error = sam_access_ino(ip, mode, FALSE, credp);
} else {
error = 0;
}
if ((error == 0) && S_ISREG(ip->di.mode) &&
(vap->va_mask & AT_SIZE) && (vap->va_size == 0)) {
/*
* If logging, do the truncate after the
* LQFS create transaction is logged.
*/
if (TRANS_ISTRANS(ip->mp)) {
truncflag++;
} else {
RW_LOCK_OS(&ip->inode_rwl, RW_WRITER);
error = sam_clear_file(ip, 0,
STALE_ARCHIVE, credp);
RW_UNLOCK_OS(&ip->inode_rwl, RW_WRITER);
}
if (error == 0) {
VNEVENT_CREATE_OS(SAM_ITOV(ip), NULL);
}
}
}
/*
* Cannot do the following as it caused a stale of
* offline copies.
*/
#if 0
if ((error == 0) && ((mode & O_CREAT) == 0)) {
TRANS_INODE(ip->mp, ip);
sam_mark_ino(ip, SAM_UPDATED|SAM_CHANGED);
}
#endif
if (error) {
VN_RELE(SAM_ITOV(ip)); /* Decrement v_count if error */
}
} else {
RW_UNLOCK_OS(&pip->data_rwl, RW_WRITER);
}
#ifdef LQFS_TODO_LOCKFS
if (ulp) {
#endif /* LQFS_TODO_LOCKFS */
TRANS_END_CSYNC(pip->mp, terr, issync, TOP_CREATE, trans_size);
/*
* If we haven't had a more interesting failure
* already, then anything that might've happened
* here should be reported.
*/
if (error == 0) {
error = terr;
}
#ifdef LQFS_TODO_LOCKFS
}
#endif /* LQFS_TODO_LOCKFS */
if (!error && truncflag) {
(void) TRANS_ITRUNC(ip, (u_offset_t)0, STALE_ARCHIVE, credp);
}
#ifdef LQFS_TODO_LOCKFS
if (ulp) {
qfs_lockfs_end(ulp);
}
#endif /* LQFS_TODO_LOCKFS */
if (error == 0) {
*vpp = SAM_ITOV(ip);
TRACE(T_SAM_CREATE_RET, SAM_ITOV(pip), (sam_tr_t)* vpp,
ip->di.id.ino, error);
}
return (error);
}
