void nameattrpack(attrinfo_t *aip, const char *name, int namelen)
{
void *varbufptr;
struct attrreference * attr_refptr;
u_int32_t attrlen;
size_t nfdlen, freespace;
varbufptr = *aip->ai_varbufpp;
attr_refptr = (struct attrreference *)(*aip->ai_attrbufpp);
freespace = (char*)aip->ai_varbufend - (char*)varbufptr;
/*
* Mac OS X: non-ascii names are UTF-8 NFC on disk
* so convert to NFD before exporting them.
*/
namelen = strlen(name);
if (is_ascii_str(name) ||
utf8_normalizestr((const u_int8_t *)name, namelen,
(u_int8_t *)varbufptr, &nfdlen,
freespace, UTF_DECOMPOSED) != 0) {
/* ASCII or normalization failed, just copy zap name. */
strncpy((char *)varbufptr, name, MIN(freespace, namelen+1));
} else {
/* Normalization succeeded (already in buffer). */
namelen = nfdlen;
}
attrlen = namelen + 1;
attr_refptr->attr_dataoffset = (char *)varbufptr - (char *)attr_refptr;
attr_refptr->attr_length = attrlen;
/*
* Advance beyond the space just allocated and
* round up to the next 4-byte boundary:
*/
varbufptr = ((char *)varbufptr) + attrlen + ((4 - (attrlen & 3)) & 3);
++attr_refptr;
*aip->ai_attrbufpp = attr_refptr;
*aip->ai_varbufpp = varbufptr;
}
zfs_dirent_lock(zfs_dirlock_t **dlpp, znode_t *dzp, char *name, znode_t **zpp,
int flag)
#endif
{
zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
zfs_dirlock_t *dl;
uint64_t zoid;
int error;
vnode_t *vp;
#ifdef __APPLE__
char *name;
u_int8_t *nfc_name = NULL; /* NFC form of name */
int nfc_namesize = 0;
#endif
*zpp = NULL;
*dlpp = NULL;
#ifdef __APPLE__
/* Note: cnp will be NULL for ZXATTR case */
name = cnp ? cnp->cn_nameptr : "";
if (cnp)
ASSERT(name[cnp->cn_namelen] == '\0');
#endif
/*
* Verify that we are not trying to lock '.', '..', or '.zfs'
*/
if ((name[0] == '.') &&
((name[1] == '\0') || ((name[1] == '.') && (name[2] == '\0'))) ||
zfs_has_ctldir(dzp) && strcmp(name, ZFS_CTLDIR_NAME) == 0)
return (EEXIST);
#ifdef __APPLE__
/*
* Mac OS X: store non-ascii names in UTF-8 NFC (pre-composed) on disk.
*
* The NFC name ptr is stored in dl->dl_name (allocated here)
* and its freed by zfs_dirent_unlock (since dl_namesize != 0).
*
* Since NFC size will not expand, we can allocate the same sized buffer.
*/
if (!is_ascii_str(name)) {
size_t outlen;
nfc_namesize = strlen(name) + 1;
nfc_name = kmem_alloc(nfc_namesize, KM_SLEEP);
if (utf8_normalizestr((const u_int8_t *)name, nfc_namesize, nfc_name,
&outlen, nfc_namesize, UTF_PRECOMPOSED) == 0) {
/* Normalization succeeded, switch to NFC name. */
name = (char *)nfc_name;
} else {
/* Normalization failed, just use input name as-is. */
kmem_free(nfc_name, nfc_namesize);
nfc_name = NULL;
}
}
#endif
/*
* Wait until there are no locks on this name.
*/
rw_enter(&dzp->z_name_lock, RW_READER);
mutex_enter(&dzp->z_lock);
for (;;) {
if (dzp->z_unlinked) {
mutex_exit(&dzp->z_lock);
rw_exit(&dzp->z_name_lock);
#ifdef __APPLE__
/* Release any unused NFC name before returning */
if (nfc_name) {
kmem_free(nfc_name, nfc_namesize);
}
#endif
return (ENOENT);
}
for (dl = dzp->z_dirlocks; dl != NULL; dl = dl->dl_next)
if (strcmp(name, dl->dl_name) == 0)
break;
if (dl == NULL) {
/*
* Allocate a new dirlock and add it to the list.
*/
dl = kmem_alloc(sizeof (zfs_dirlock_t), KM_SLEEP);
cv_init(&dl->dl_cv, NULL, CV_DEFAULT, NULL);
dl->dl_name = name;
dl->dl_sharecnt = 0;
dl->dl_namesize = 0;
dl->dl_dzp = dzp;
dl->dl_next = dzp->z_dirlocks;
dzp->z_dirlocks = dl;
#ifdef __APPLE__
/*
* Keep the NFC name around in dir lock by tagging it
* (setting nfc_namesize).
*/
if (nfc_name) {
dl->dl_namesize = nfc_namesize;
nfc_name = NULL; /* its now part of the dir lock */
}
#endif
break;
}
if ((flag & ZSHARED) && dl->dl_sharecnt != 0)
break;
cv_wait(&dl->dl_cv, &dzp->z_lock);
dl=NULL;
}
#ifdef __APPLE__
/*
* Release any unused NFC name (ie if we found a pre-existing lock entry)
*/
if (nfc_name) {
kmem_free(nfc_name, nfc_namesize);
nfc_name = NULL;
}
#endif
if ((flag & ZSHARED) && ++dl->dl_sharecnt > 1 && dl->dl_namesize == 0) {
/*
* We're the second shared reference to dl. Make a copy of
* dl_name in case the first thread goes away before we do.
* Note that we initialize the new name before storing its
* pointer into dl_name, because the first thread may load
* dl->dl_name at any time. He'll either see the old value,
* which is his, or the new shared copy; either is OK.
*/
dl->dl_namesize = strlen(dl->dl_name) + 1;
name = kmem_alloc(dl->dl_namesize, KM_SLEEP);
bcopy(dl->dl_name, name, dl->dl_namesize);
dl->dl_name = name;
}
mutex_exit(&dzp->z_lock);
/*
* We have a dirlock on the name. (Note that it is the dirlock,
* not the dzp's z_lock, that protects the name in the zap object.)
* See if there's an object by this name; if so, put a hold on it.
*/
if (flag & ZXATTR) {
error = sa_lookup(dzp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs), &zoid,
sizeof (zoid));
if (error == 0)
error = (zoid == 0 ? ENOENT : 0);
} else {
#ifdef __APPLE__
/*
* Lookup an entry in the vnode name cache
*
* If the lookup succeeds, the vnode is returned in *vpp,
* and a status of -1 is returned.
*
* If the lookup determines that the name does not exist
* (negative caching), a status of ENOENT is returned.
*
* If the lookup fails, a status of zero is returned.
*/
switch ( cache_lookup(ZTOV(dzp), &vp, cnp) ) {
case -1:
break;
case ENOENT:
vp = DNLC_NO_VNODE;
break;
default:
vp = NULLVP;
}
#else
vp = dnlc_lookup(ZTOV(dzp), name);
#endif /* __APPLE__ */
if (vp == DNLC_NO_VNODE) {
VN_RELE(vp);
error = ENOENT;
} else if (vp) {
if (flag & ZNEW) {
zfs_dirent_unlock(dl);
VN_RELE(vp);
return (EEXIST);
}
*dlpp = dl;
*zpp = VTOZ(vp);
return (0);
} else {
error = zap_lookup(zfsvfs->z_os, dzp->z_id, name,
8, 1, &zoid);
zoid = ZFS_DIRENT_OBJ(zoid);
if (error == ENOENT)
#ifdef __APPLE__
/*
* Add a negative entry into the VFS name cache
*/
if ((flag & ZNEW) == 0 &&
(dzp->z_pflags & ZFS_XATTR) == 0 &&
(cnp) &&
(cnp->cn_flags & MAKEENTRY) &&
(cnp->cn_nameiop != CREATE) &&
(cnp->cn_nameiop != RENAME)) {
cache_enter(ZTOV(dzp), NULLVP, cnp);
}
#else
dnlc_update(ZTOV(dzp), name, DNLC_NO_VNODE);
#endif /* __APPLE__ */
}
}
if (error) {
if (error != ENOENT || (flag & ZEXISTS)) {
zfs_dirent_unlock(dl);
return (error);
}
} else {
if (flag & ZNEW) {
zfs_dirent_unlock(dl);
return (EEXIST);
}
//error = zfs_zget_sans_vnode(zfsvfs, zoid, zpp);
error = zfs_zget(zfsvfs, zoid, zpp);
if (error) {
zfs_dirent_unlock(dl);
return (error);
} else {
// Should this be here?
//printf("zfs_dir attach 1\n");
//zfs_attach_vnode(*zpp);
}
if (!(flag & ZXATTR))
#ifdef __APPLE__
if (cnp && cnp->cn_flags & MAKEENTRY)
cache_enter(ZTOV(dzp), ZTOV(*zpp), cnp);
#else
dnlc_update(ZTOV(dzp), name, ZTOV(*zpp));
#endif /* __APPLE__ */
}
*dlpp = dl;
return (0);
}
