static int mdt_getxattr_all(struct mdt_thread_info *info,
struct mdt_body *reqbody, struct mdt_body *repbody,
struct lu_buf *buf, struct md_object *next)
{
const struct lu_env *env = info->mti_env;
struct ptlrpc_request *req = mdt_info_req(info);
struct mdt_export_data *med = mdt_req2med(req);
struct lu_ucred *uc = mdt_ucred(info);
char *v, *b, *eadatahead, *eadatatail;
__u32 *sizes;
int eadatasize, eavallen = 0, eavallens = 0, rc;
ENTRY;
/*
* The format of the pill is the following:
* EADATA: attr1\0attr2\0...attrn\0
* EAVALS: val1val2...valn
* EAVALS_LENS: 4,4,...4
*/
eadatahead = buf->lb_buf;
/* Fill out EADATA first */
eadatasize = mo_xattr_list(env, next, buf);
if (eadatasize < 0)
GOTO(out, rc = eadatasize);
eadatatail = eadatahead + eadatasize;
v = req_capsule_server_get(info->mti_pill, &RMF_EAVALS);
sizes = req_capsule_server_get(info->mti_pill, &RMF_EAVALS_LENS);
/* Fill out EAVALS and EAVALS_LENS */
for (b = eadatahead; b < eadatatail; b += strlen(b) + 1, v += rc) {
buf->lb_buf = v;
buf->lb_len = reqbody->eadatasize - eavallen;
rc = mdt_getxattr_one(info, b, next, buf, med, uc);
if (rc < 0)
GOTO(out, rc);
sizes[eavallens] = rc;
eavallens++;
eavallen += rc;
}
repbody->aclsize = eavallen;
repbody->max_mdsize = eavallens;
req_capsule_shrink(info->mti_pill, &RMF_EAVALS, eavallen, RCL_SERVER);
req_capsule_shrink(info->mti_pill, &RMF_EAVALS_LENS,
eavallens * sizeof(__u32), RCL_SERVER);
req_capsule_shrink(info->mti_pill, &RMF_EADATA, eadatasize, RCL_SERVER);
GOTO(out, rc = eadatasize);
out:
return rc;
}
void mdt_shrink_reply(struct mdt_thread_info *info)
{
struct req_capsule *pill = info->mti_pill;
struct mdt_body *body;
int md_size;
int acl_size;
ENTRY;
body = req_capsule_server_get(pill, &RMF_MDT_BODY);
LASSERT(body != NULL);
if (body->valid & (OBD_MD_FLDIREA | OBD_MD_FLEASIZE | OBD_MD_LINKNAME))
md_size = body->eadatasize;
else
md_size = 0;
acl_size = body->aclsize;
/* this replay - not send info to client */
if (info->mti_spec.no_create == 1) {
md_size = 0;
acl_size = 0;
}
CDEBUG(D_INFO, "Shrink to md_size = %d cookie/acl_size = %d"
" MDSCAPA = %llx, OSSCAPA = %llx\n",
md_size, acl_size,
(unsigned long long)(body->valid & OBD_MD_FLMDSCAPA),
(unsigned long long)(body->valid & OBD_MD_FLOSSCAPA));
/*
&RMF_MDT_BODY,
&RMF_MDT_MD,
&RMF_ACL, or &RMF_LOGCOOKIES
(optional) &RMF_CAPA1,
(optional) &RMF_CAPA2,
(optional) something else
*/
if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
req_capsule_shrink(pill, &RMF_MDT_MD, md_size,
RCL_SERVER);
if (req_capsule_has_field(pill, &RMF_ACL, RCL_SERVER))
req_capsule_shrink(pill, &RMF_ACL, acl_size, RCL_SERVER);
else if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER))
req_capsule_shrink(pill, &RMF_LOGCOOKIES,
acl_size, RCL_SERVER);
if (req_capsule_has_field(pill, &RMF_CAPA1, RCL_SERVER) &&
!(body->valid & OBD_MD_FLMDSCAPA))
req_capsule_shrink(pill, &RMF_CAPA1, 0, RCL_SERVER);
if (req_capsule_has_field(pill, &RMF_CAPA2, RCL_SERVER) &&
!(body->valid & OBD_MD_FLOSSCAPA))
req_capsule_shrink(pill, &RMF_CAPA2, 0, RCL_SERVER);
/*
* Some more field should be shrinked if needed.
* This should be done by those who added fields to reply message.
*/
EXIT;
}
static int mdt_getxattr_all(struct mdt_thread_info *info,
struct mdt_body *reqbody, struct mdt_body *repbody,
struct lu_buf *buf, struct md_object *next)
{
const struct lu_env *env = info->mti_env;
char *v, *b, *eadatahead, *eadatatail;
__u32 *sizes;
int eadatasize, eavallen = 0, eavallens = 0, rc;
ENTRY;
/*
* The format of the pill is the following:
* EADATA: attr1\0attr2\0...attrn\0
* EAVALS: val1val2...valn
* EAVALS_LENS: 4,4,...4
*/
eadatahead = buf->lb_buf;
/* Fill out EADATA first */
rc = mo_xattr_list(env, next, buf);
if (rc < 0)
GOTO(out_shrink, rc);
eadatasize = rc;
eadatatail = eadatahead + eadatasize;
v = req_capsule_server_get(info->mti_pill, &RMF_EAVALS);
sizes = req_capsule_server_get(info->mti_pill, &RMF_EAVALS_LENS);
/* Fill out EAVALS and EAVALS_LENS */
for (b = eadatahead; b < eadatatail; b += strlen(b) + 1, v += rc) {
buf->lb_buf = v;
buf->lb_len = reqbody->mbo_eadatasize - eavallen;
rc = mo_xattr_get(env, next, buf, b);
if (rc < 0)
GOTO(out_shrink, rc);
rc = mdt_nodemap_map_acl(info, buf->lb_buf, rc, b,
NODEMAP_FS_TO_CLIENT);
if (rc < 0)
GOTO(out_shrink, rc);
sizes[eavallens] = rc;
eavallens++;
eavallen += rc;
}
out_shrink:
if (rc < 0) {
eadatasize = 0;
eavallens = 0;
eavallen = 0;
}
repbody->mbo_aclsize = eavallen;
repbody->mbo_max_mdsize = eavallens;
req_capsule_shrink(info->mti_pill, &RMF_EAVALS, eavallen, RCL_SERVER);
req_capsule_shrink(info->mti_pill, &RMF_EAVALS_LENS,
eavallens * sizeof(__u32), RCL_SERVER);
req_capsule_shrink(info->mti_pill, &RMF_EADATA, eadatasize, RCL_SERVER);
if (rc >= 0)
RETURN(eadatasize);
return rc;
}
/* Shrink and/or grow reply buffers */
int mdt_fix_reply(struct mdt_thread_info *info)
{
struct req_capsule *pill = info->mti_pill;
struct mdt_body *body;
int md_size, md_packed = 0;
int acl_size;
int rc = 0;
ENTRY;
body = req_capsule_server_get(pill, &RMF_MDT_BODY);
LASSERT(body != NULL);
if (body->valid & (OBD_MD_FLDIREA | OBD_MD_FLEASIZE | OBD_MD_LINKNAME))
md_size = body->eadatasize;
else
md_size = 0;
acl_size = body->aclsize;
/* this replay - not send info to client */
if (info->mti_spec.no_create) {
md_size = 0;
acl_size = 0;
}
CDEBUG(D_INFO, "Shrink to md_size = %d cookie/acl_size = %d"
" MDSCAPA = %llx, OSSCAPA = %llx\n",
md_size, acl_size,
(unsigned long long)(body->valid & OBD_MD_FLMDSCAPA),
(unsigned long long)(body->valid & OBD_MD_FLOSSCAPA));
/*
&RMF_MDT_BODY,
&RMF_MDT_MD,
&RMF_ACL, or &RMF_LOGCOOKIES
(optional) &RMF_CAPA1,
(optional) &RMF_CAPA2,
(optional) something else
*/
/* MDT_MD buffer may be bigger than packed value, let's shrink all
* buffers before growing it */
if (info->mti_big_lmm_used) {
LASSERT(req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER));
/* free big lmm if md_size is not needed */
if (md_size == 0) {
info->mti_big_lmm_used = 0;
} else {
md_packed = req_capsule_get_size(pill, &RMF_MDT_MD,
RCL_SERVER);
LASSERT(md_packed > 0);
/* buffer must be allocated separately */
LASSERT(info->mti_attr.ma_lmm !=
req_capsule_server_get(pill, &RMF_MDT_MD));
req_capsule_shrink(pill, &RMF_MDT_MD, 0, RCL_SERVER);
}
} else if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER)) {
req_capsule_shrink(pill, &RMF_MDT_MD, md_size, RCL_SERVER);
}
if (req_capsule_has_field(pill, &RMF_ACL, RCL_SERVER))
req_capsule_shrink(pill, &RMF_ACL, acl_size, RCL_SERVER);
else if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER))
req_capsule_shrink(pill, &RMF_LOGCOOKIES,
acl_size, RCL_SERVER);
if (req_capsule_has_field(pill, &RMF_CAPA1, RCL_SERVER) &&
!(body->valid & OBD_MD_FLMDSCAPA))
req_capsule_shrink(pill, &RMF_CAPA1, 0, RCL_SERVER);
if (req_capsule_has_field(pill, &RMF_CAPA2, RCL_SERVER) &&
!(body->valid & OBD_MD_FLOSSCAPA))
req_capsule_shrink(pill, &RMF_CAPA2, 0, RCL_SERVER);
/*
* Some more field should be shrinked if needed.
* This should be done by those who added fields to reply message.
*/
/* Grow MD buffer if needed finally */
if (info->mti_big_lmm_used) {
void *lmm;
LASSERT(md_size > md_packed);
CDEBUG(D_INFO, "Enlarge reply buffer, need extra %d bytes\n",
md_size - md_packed);
rc = req_capsule_server_grow(pill, &RMF_MDT_MD, md_size);
if (rc) {
/* we can't answer with proper LOV EA, drop flags,
* the rc is also returned so this request is
* considered as failed */
body->valid &= ~(OBD_MD_FLDIREA | OBD_MD_FLEASIZE);
/* don't return transno along with error */
lustre_msg_set_transno(pill->rc_req->rq_repmsg, 0);
} else {
/* now we need to pack right LOV/LMV EA */
lmm = req_capsule_server_get(pill, &RMF_MDT_MD);
if (info->mti_attr.ma_valid & MA_LOV) {
LASSERT(req_capsule_get_size(pill, &RMF_MDT_MD,
RCL_SERVER) ==
info->mti_attr.ma_lmm_size);
memcpy(lmm, info->mti_attr.ma_lmm,
info->mti_attr.ma_lmm_size);
} else if (info->mti_attr.ma_valid & MA_LMV) {
LASSERT(req_capsule_get_size(pill, &RMF_MDT_MD,
RCL_SERVER) ==
info->mti_attr.ma_lmv_size);
memcpy(lmm, info->mti_attr.ma_lmv,
info->mti_attr.ma_lmv_size);
}
}
/* update mdt_max_mdsize so clients will be aware about that */
if (info->mti_mdt->mdt_max_mdsize < info->mti_attr.ma_lmm_size)
info->mti_mdt->mdt_max_mdsize =
info->mti_attr.ma_lmm_size;
info->mti_big_lmm_used = 0;
}
RETURN(rc);
}
