static int
osd_sa_xattr_list(const struct lu_env *env, struct osd_object *obj,
const struct lu_buf *lb)
{
nvpair_t *nvp = NULL;
int len, counted = 0;
int rc = 0;
if (obj->oo_sa_xattr == NULL) {
rc = __osd_xattr_cache(env, obj);
if (rc)
return rc;
}
LASSERT(obj->oo_sa_xattr);
while ((nvp = nvlist_next_nvpair(obj->oo_sa_xattr, nvp)) != NULL) {
const char *name = nvpair_name(nvp);
if (!osd_obj2dev(obj)->od_posix_acl &&
(strcmp(name, POSIX_ACL_XATTR_ACCESS) == 0 ||
strcmp(name, POSIX_ACL_XATTR_DEFAULT) == 0))
continue;
len = strlen(name);
if (lb->lb_buf != NULL) {
if (counted + len + 1 > lb->lb_len)
return -ERANGE;
memcpy(lb->lb_buf + counted, name, len + 1);
}
counted += len + 1;
}
return counted;
}
static int
__osd_sa_xattr_get(const struct lu_env *env, struct osd_object *obj,
const struct lu_buf *buf, const char *name, int *sizep)
{
uchar_t *nv_value;
int rc;
LASSERT(obj->oo_sa_hdl);
if (obj->oo_sa_xattr == NULL) {
rc = __osd_xattr_cache(env, obj);
if (rc)
return rc;
}
LASSERT(obj->oo_sa_xattr);
rc = -nvlist_lookup_byte_array(obj->oo_sa_xattr, name, &nv_value,
sizep);
if (rc)
return rc;
if (buf == NULL || buf->lb_buf == NULL) {
/* return the required size by *sizep */
return 0;
}
if (*sizep > buf->lb_len)
return -ERANGE; /* match ldiskfs error */
memcpy(buf->lb_buf, nv_value, *sizep);
return 0;
}
static int
osd_sa_xattr_list(const struct lu_env *env, struct osd_object *obj,
struct lu_buf *lb)
{
nvpair_t *nvp = NULL;
int len, counted = 0, remain = lb->lb_len;
int rc = 0;
if (obj->oo_sa_xattr == NULL) {
rc = __osd_xattr_cache(env, obj);
if (rc)
return rc;
}
LASSERT(obj->oo_sa_xattr);
while ((nvp = nvlist_next_nvpair(obj->oo_sa_xattr, nvp)) != NULL) {
len = strlen(nvpair_name(nvp));
if (lb->lb_buf != NULL) {
if (len + 1 > remain)
return -ERANGE;
memcpy(lb->lb_buf, nvpair_name(nvp), len);
lb->lb_buf += len;
*((char *)lb->lb_buf) = '\0';
lb->lb_buf++;
remain -= len + 1;
}
counted += len + 1;
}
return counted;
}
static int __osd_sa_xattr_del(const struct lu_env *env, struct osd_object *obj,
const char *name, struct osd_thandle *oh)
{
int rc;
if (obj->oo_sa_xattr == NULL) {
rc = __osd_xattr_cache(env, obj);
if (rc)
return rc;
}
rc = -nvlist_remove(obj->oo_sa_xattr, name, DATA_TYPE_BYTE_ARRAY);
if (rc == 0)
rc = __osd_sa_xattr_schedule_update(env, obj, oh);
return rc;
}
int __osd_sa_xattr_set(const struct lu_env *env, struct osd_object *obj,
const struct lu_buf *buf, const char *name, int fl,
struct osd_thandle *oh)
{
dmu_buf_impl_t *db;
uchar_t *nv_value;
size_t size;
int nv_size;
int rc;
int too_big = 0;
LASSERT(obj->oo_sa_hdl);
if (obj->oo_sa_xattr == NULL) {
rc = __osd_xattr_cache(env, obj);
if (rc)
return rc;
}
LASSERT(obj->oo_sa_xattr);
/* Limited to 32k to keep nvpair memory allocations small */
if (buf->lb_len > DXATTR_MAX_ENTRY_SIZE) {
too_big = 1;
} else {
/* Prevent the DXATTR SA from consuming the entire SA
* region */
rc = -nvlist_size(obj->oo_sa_xattr, &size, NV_ENCODE_XDR);
if (rc)
return rc;
if (size + buf->lb_len > DXATTR_MAX_SA_SIZE)
too_big = 1;
}
/* even in case of -EFBIG we must lookup xattr and check can we
* rewrite it then delete from SA */
rc = -nvlist_lookup_byte_array(obj->oo_sa_xattr, name, &nv_value,
&nv_size);
if (rc == 0) {
if (fl & LU_XATTR_CREATE) {
return -EEXIST;
} else if (too_big) {
rc = -nvlist_remove(obj->oo_sa_xattr, name,
DATA_TYPE_BYTE_ARRAY);
if (rc < 0)
return rc;
rc = __osd_sa_xattr_schedule_update(env, obj, oh);
return rc == 0 ? -EFBIG : rc;
}
} else if (rc == -ENOENT) {
if (fl & LU_XATTR_REPLACE)
return -ENODATA;
else if (too_big)
return -EFBIG;
} else {
return rc;
}
/* Ensure xattr doesn't exist in ZAP */
if (obj->oo_xattr != ZFS_NO_OBJECT) {
struct osd_device *osd = osd_obj2dev(obj);
uint64_t objid;
rc = -zap_lookup(osd->od_os, obj->oo_xattr,
name, 8, 1, &objid);
if (rc == 0) {
rc = -dmu_object_free(osd->od_os, objid, oh->ot_tx);
if (rc == 0)
zap_remove(osd->od_os, obj->oo_xattr,
name, oh->ot_tx);
}
}
rc = -nvlist_add_byte_array(obj->oo_sa_xattr, name,
(uchar_t *)buf->lb_buf, buf->lb_len);
if (rc)
return rc;
/* batch updates only for just created dnodes where we
* used to set number of EAs in a single transaction */
db = (dmu_buf_impl_t *)obj->oo_db;
if (DB_DNODE(db)->dn_allocated_txg == oh->ot_tx->tx_txg)
rc = __osd_sa_xattr_schedule_update(env, obj, oh);
else
rc = __osd_sa_xattr_update(env, obj, oh);
return rc;
}
int __osd_sa_xattr_set(const struct lu_env *env, struct osd_object *obj,
const struct lu_buf *buf, const char *name, int fl,
struct osd_thandle *oh)
{
uchar_t *nv_value;
size_t size;
int nv_size;
int rc;
int too_big = 0;
LASSERT(obj->oo_sa_hdl);
if (obj->oo_sa_xattr == NULL) {
rc = __osd_xattr_cache(env, obj);
if (rc)
return rc;
}
LASSERT(obj->oo_sa_xattr);
/* Limited to 32k to keep nvpair memory allocations small */
if (buf->lb_len > DXATTR_MAX_ENTRY_SIZE) {
too_big = 1;
} else {
/* Prevent the DXATTR SA from consuming the entire SA
* region */
rc = -nvlist_size(obj->oo_sa_xattr, &size, NV_ENCODE_XDR);
if (rc)
return rc;
if (size + buf->lb_len > DXATTR_MAX_SA_SIZE)
too_big = 1;
}
/* even in case of -EFBIG we must lookup xattr and check can we
* rewrite it then delete from SA */
rc = -nvlist_lookup_byte_array(obj->oo_sa_xattr, name, &nv_value,
&nv_size);
if (rc == 0) {
if (fl & LU_XATTR_CREATE) {
return -EEXIST;
} else if (too_big) {
rc = -nvlist_remove(obj->oo_sa_xattr, name,
DATA_TYPE_BYTE_ARRAY);
if (rc < 0)
return rc;
rc = __osd_sa_xattr_update(env, obj, oh);
return rc == 0 ? -EFBIG : rc;
}
} else if (rc == -ENOENT) {
if (fl & LU_XATTR_REPLACE)
return -ENODATA;
else if (too_big)
return -EFBIG;
} else {
return rc;
}
rc = -nvlist_add_byte_array(obj->oo_sa_xattr, name,
(uchar_t *)buf->lb_buf, buf->lb_len);
if (rc)
return rc;
rc = __osd_sa_xattr_update(env, obj, oh);
return rc;
}
