static
nfsstat3 nfs_readdir_dot_entry(struct fsal_obj_handle *obj, const char *name,
uint64_t cookie, fsal_getattr_cb_t cb,
struct nfs3_readdir_cb_data *tracker)
{
struct fsal_readdir_cb_parms cb_parms;
fsal_status_t fsal_status;
cb_parms.opaque = tracker;
cb_parms.name = name;
cb_parms.attr_allowed = true;
cb_parms.in_result = true;
/* NFS v3 READDIR does not use attributes, so pass NULL */
fsal_status.major = cb(&cb_parms, obj, NULL, 0, cookie, CB_ORIGINAL);
if (FSAL_IS_ERROR(fsal_status))
return nfs3_Errno_status(fsal_status);
else
return tracker->error;
}
int nfs3_remove(nfs_arg_t *arg, struct svc_req *req, nfs_res_t *res)
{
struct fsal_obj_handle *parent_obj = NULL;
struct fsal_obj_handle *child_obj = NULL;
pre_op_attr pre_parent = {
.attributes_follow = false
};
fsal_status_t fsal_status;
const char *name = arg->arg_remove3.object.name;
int rc = NFS_REQ_OK;
if (isDebug(COMPONENT_NFSPROTO)) {
char str[LEN_FH_STR];
nfs_FhandleToStr(req->rq_msg.cb_vers,
&arg->arg_create3.where.dir,
NULL,
str);
LogDebug(COMPONENT_NFSPROTO,
"REQUEST PROCESSING: Calling nfs_Remove handle: %s name: %s",
str, name);
}
/* Convert file handle into a pentry */
/* to avoid setting it on each error case */
res->res_remove3.REMOVE3res_u.resfail.dir_wcc.before.attributes_follow =
FALSE;
res->res_remove3.REMOVE3res_u.resfail.dir_wcc.after.attributes_follow =
FALSE;
parent_obj = nfs3_FhandleToCache(&arg->arg_remove3.object.dir,
&res->res_remove3.status,
&rc);
if (parent_obj == NULL) {
/* Status and rc have been set by nfs3_FhandleToCache */
goto out;
}
nfs_SetPreOpAttr(parent_obj, &pre_parent);
/* Sanity checks: file name must be non-null; parent must be a
* directory.
*/
if (parent_obj->type != DIRECTORY) {
res->res_remove3.status = NFS3ERR_NOTDIR;
rc = NFS_REQ_OK;
goto out;
}
if (name == NULL || *name == '\0') {
fsal_status = fsalstat(ERR_FSAL_INVAL, 0);
goto out_fail;
}
/* Lookup the child entry to verify that it is not a directory */
fsal_status = fsal_lookup(parent_obj, name, &child_obj, NULL);
if (!FSAL_IS_ERROR(fsal_status)) {
/* Sanity check: make sure we are not removing a
* directory
*/
if (child_obj->type == DIRECTORY) {
res->res_remove3.status = NFS3ERR_ISDIR;
rc = NFS_REQ_OK;
goto out;
}
}
LogFullDebug(COMPONENT_NFSPROTO, "Trying to remove file %s", name);
/* Remove the entry. */
fsal_status = fsal_remove(parent_obj, name);
if (FSAL_IS_ERROR(fsal_status))
goto out_fail;
/* Build Weak Cache Coherency data */
nfs_SetWccData(&pre_parent, parent_obj,
&res->res_remove3.REMOVE3res_u.resok.dir_wcc);
res->res_remove3.status = NFS3_OK;
rc = NFS_REQ_OK;
goto out;
out_fail:
res->res_remove3.status = nfs3_Errno_status(fsal_status);
nfs_SetWccData(&pre_parent, parent_obj,
&res->res_remove3.REMOVE3res_u.resfail.dir_wcc);
if (nfs_RetryableError(fsal_status.major))
rc = NFS_REQ_DROP;
out:
/* return references */
if (child_obj)
child_obj->obj_ops.put_ref(child_obj);
if (parent_obj)
parent_obj->obj_ops.put_ref(parent_obj);
return rc;
} /* nfs3_remove */
/**
* @brief Free the result structure allocated for nfs3_remove.
*
* This function frees the result structure allocated for nfs3_remove.
*
* @param[in,out] res Result structure
*
*/
void nfs3_remove_free(nfs_res_t *res)
{
/* Nothing to do here */
}
/**
*
* @brief The NFSPROC3_LINK
*
* The NFSPROC3_LINK.
*
* @param[in] arg NFS argument union
* @param[in] req SVC request related to this call
* @param[out] res Structure to contain the result of the call
*
* @retval NFS_REQ_OK if successful
* @retval NFS_REQ_DROP if failed but retryable
* @retval NFS_REQ_FAILED if failed and not retryable
*
*/
int nfs3_link(nfs_arg_t *arg, struct svc_req *req, nfs_res_t *res)
{
struct LINK3args *l3_arg = &arg->arg_link3;
struct LINK3res *l3_res = &res->res_link3;
const char *link_name = l3_arg->link.name;
struct fsal_obj_handle *target_obj = NULL;
struct fsal_obj_handle *parent_obj = NULL;
pre_op_attr pre_parent = {0};
fsal_status_t fsal_status = {0, 0};
int rc = NFS_REQ_OK;
if (isDebug(COMPONENT_NFSPROTO)) {
char strto[LEN_FH_STR], strfrom[LEN_FH_STR];
nfs_FhandleToStr(req->rq_msg.cb_vers, &l3_arg->file,
NULL, strfrom);
nfs_FhandleToStr(req->rq_msg.cb_vers, &l3_arg->link.dir,
NULL, strto);
LogDebug(COMPONENT_NFSPROTO,
"REQUEST PROCESSING: Calling nfs3_link handle: %s to handle: %s name: %s",
strfrom, strto, link_name);
}
/* to avoid setting it on each error case */
l3_res->LINK3res_u.resfail.file_attributes.attributes_follow = FALSE;
l3_res->LINK3res_u.resfail.linkdir_wcc.before.attributes_follow = FALSE;
l3_res->LINK3res_u.resfail.linkdir_wcc.after.attributes_follow = FALSE;
l3_res->status = nfs3_verify_exportid(l3_arg, req);
if (l3_res->status != NFS3_OK)
return rc;
parent_obj = nfs3_FhandleToCache(&l3_arg->link.dir, &l3_res->status,
&rc);
if (parent_obj == NULL)
return rc; /* Status and rc are set by nfs3_FhandleToCache */
nfs_SetPreOpAttr(parent_obj, &pre_parent);
target_obj = nfs3_FhandleToCache(&l3_arg->file, &l3_res->status, &rc);
if (target_obj == NULL) {
parent_obj->obj_ops.put_ref(parent_obj);
return rc; /* Status and rc are set by nfs3_FhandleToCache */
}
if (parent_obj->type != DIRECTORY) {
l3_res->status = NFS3ERR_NOTDIR;
goto out;
}
if (link_name == NULL || *link_name == '\0') {
l3_res->status = NFS3ERR_INVAL;
goto out;
}
fsal_status = fsal_link(target_obj, parent_obj, link_name);
if (FSAL_IS_ERROR(fsal_status)) {
/* If we are here, there was an error */
LogFullDebug(COMPONENT_NFSPROTO,
"failed link: fsal_status=%s",
fsal_err_txt(fsal_status));
if (nfs_RetryableError(fsal_status.major)) {
rc = NFS_REQ_DROP;
goto out;
}
l3_res->status = nfs3_Errno_status(fsal_status);
nfs_SetPostOpAttr(target_obj,
&l3_res->LINK3res_u.resfail.file_attributes,
NULL);
nfs_SetWccData(&pre_parent, parent_obj,
&l3_res->LINK3res_u.resfail.linkdir_wcc);
} else {
nfs_SetPostOpAttr(target_obj,
&l3_res->LINK3res_u.resok.file_attributes,
NULL);
nfs_SetWccData(&pre_parent, parent_obj,
&l3_res->LINK3res_u.resok.linkdir_wcc);
l3_res->status = NFS3_OK;
}
out:
/* return references */
target_obj->obj_ops.put_ref(target_obj);
parent_obj->obj_ops.put_ref(parent_obj);
return rc;
} /* nfs3_link */
int nfs3_readdir(nfs_arg_t *arg, struct svc_req *req, nfs_res_t *res)
{
struct fsal_obj_handle *dir_obj = NULL;
struct fsal_obj_handle *parent_dir_obj = NULL;
unsigned long count = 0;
uint64_t cookie = 0;
uint64_t fsal_cookie = 0;
cookieverf3 cookie_verifier;
unsigned int num_entries = 0;
unsigned long estimated_num_entries = 0;
object_file_type_t dir_filetype = 0;
bool eod_met = false;
fsal_status_t fsal_status = {0, 0};
fsal_status_t fsal_status_gethandle = {0, 0};
int rc = NFS_REQ_OK;
struct nfs3_readdir_cb_data tracker = { NULL };
bool use_cookie_verifier = op_ctx_export_has_option(
EXPORT_OPTION_USE_COOKIE_VERIFIER);
if (isDebug(COMPONENT_NFSPROTO) || isDebug(COMPONENT_NFS_READDIR)) {
char str[LEN_FH_STR];
log_components_t component;
nfs_FhandleToStr(req->rq_vers,
&(arg->arg_readdir3.dir),
NULL,
str);
if (isDebug(COMPONENT_NFSPROTO))
component = COMPONENT_NFSPROTO;
else
component = COMPONENT_NFS_READDIR;
LogDebug(component,
"REQUEST PROCESSING: Calling nfs_Readdir handle: %s",
str);
}
READDIR3resok * const RES_READDIR3_OK =
&res->res_readdir3.READDIR3res_u.resok;
/* to avoid setting it on each error case */
res->res_readdir3.READDIR3res_u.resfail.dir_attributes.
attributes_follow = FALSE;
/* Look up object for filehandle */
dir_obj = nfs3_FhandleToCache(&(arg->arg_readdir3.dir),
&(res->res_readdir3.status),
&rc);
if (dir_obj == NULL) {
/* Status and rc have been set by nfs3_FhandleToCache */
goto out;
}
/* Extract the filetype */
dir_filetype = dir_obj->type;
/* Sanity checks -- must be a directory */
if (dir_filetype != DIRECTORY) {
res->res_readdir3.status = NFS3ERR_NOTDIR;
rc = NFS_REQ_OK;
goto out;
}
/* Parse out request arguments and decide how many entries we
* want. For NFSv3, deal with the cookie verifier.
*/
count = arg->arg_readdir3.count;
cookie = arg->arg_readdir3.cookie;
estimated_num_entries =
MIN(count / (sizeof(entry3) - sizeof(char *)), 120);
LogFullDebug(COMPONENT_NFS_READDIR,
"---> nfs3_readdir: count=%lu cookie=%" PRIu64
" estimated_num_entries=%lu",
count, cookie, estimated_num_entries);
if (estimated_num_entries == 0) {
res->res_readdir3.status = NFS3ERR_TOOSMALL;
rc = NFS_REQ_OK;
goto out;
}
/* To make or check the cookie verifier */
memset(cookie_verifier, 0, sizeof(cookieverf3));
/* If cookie verifier is used, then a
* non-trivial value is returned to the
* client.
*
* This value is the ctime of the directory. If verifier is
* unused (as in many NFS Servers) then only a set of zeros
* is returned (trivial value).
*/
if (use_cookie_verifier) {
struct attrlist attrs;
fsal_prepare_attrs(&attrs, ATTR_CTIME);
fsal_status = dir_obj->obj_ops.getattrs(dir_obj, &attrs);
if (FSAL_IS_ERROR(fsal_status)) {
res->res_readdir3.status =
nfs3_Errno_status(fsal_status);
LogFullDebug(COMPONENT_NFS_READDIR,
"getattrs returned %s",
msg_fsal_err(fsal_status.major));
goto out;
}
memcpy(cookie_verifier,
&attrs.ctime.tv_sec,
sizeof(attrs.ctime.tv_sec));
/* Done with the attrs */
fsal_release_attrs(&attrs);
}
if (cookie != 0 && use_cookie_verifier) {
/* Not the first call, so we have to check the cookie
* verifier
*/
if (memcmp(cookie_verifier,
arg->arg_readdir3.cookieverf,
NFS3_COOKIEVERFSIZE) != 0) {
res->res_readdir3.status = NFS3ERR_BAD_COOKIE;
rc = NFS_REQ_OK;
goto out;
}
}
tracker.entries = gsh_calloc(estimated_num_entries, sizeof(entry3));
tracker.total_entries = estimated_num_entries;
tracker.mem_left = count - sizeof(READDIR3resok);
tracker.count = 0;
tracker.error = NFS3_OK;
/* Adjust the cookie we supply to fsal */
if (cookie > 2) { /* it is not the cookie for "." nor ".." */
fsal_cookie = cookie;
} else {
fsal_cookie = 0;
}
/* Fills "." */
if (cookie == 0) {
res->res_readdir3.status = nfs_readdir_dot_entry(dir_obj, ".",
1, nfs3_readdir_callback, &tracker);
if (res->res_readdir3.status != NFS3_OK) {
rc = NFS_REQ_OK;
goto out;
}
}
/* Fills ".." */
if ((cookie <= 1) && (estimated_num_entries > 1)) {
/* Get parent pentry */
fsal_status_gethandle = fsal_lookupp(dir_obj,
&parent_dir_obj,
NULL);
if (parent_dir_obj == NULL) {
res->res_readdir3.status =
nfs3_Errno_status(fsal_status_gethandle);
rc = NFS_REQ_OK;
goto out;
}
res->res_readdir3.status = nfs_readdir_dot_entry(parent_dir_obj,
"..", 2, nfs3_readdir_callback, &tracker);
if (res->res_readdir3.status != NFS3_OK) {
rc = NFS_REQ_OK;
goto out;
}
parent_dir_obj->obj_ops.put_ref(parent_dir_obj);
parent_dir_obj = NULL;
}
/* Call readdir */
fsal_status = fsal_readdir(dir_obj, fsal_cookie, &num_entries, &eod_met,
0, /* no attr */
nfs3_readdir_callback, &tracker);
if (FSAL_IS_ERROR(fsal_status)) {
if (nfs_RetryableError(fsal_status.major)) {
rc = NFS_REQ_DROP;
goto out;
}
res->res_readdir3.status = nfs3_Errno_status(fsal_status);
nfs_SetPostOpAttr(dir_obj,
&res->res_readdir3.READDIR3res_u.resfail.
dir_attributes,
NULL);
goto out;
}
if (tracker.error != NFS3_OK) {
res->res_readdir3.status = tracker.error;
nfs_SetPostOpAttr(dir_obj,
&res->res_readdir3.READDIR3res_u.resfail.
dir_attributes,
NULL);
goto out;
}
LogFullDebug(COMPONENT_NFS_READDIR,
"-- Readdir -> Call to fsal_readdir(cookie=%"
PRIu64 ")",
fsal_cookie);
if ((num_entries == 0) && (cookie > 1)) {
RES_READDIR3_OK->reply.entries = NULL;
RES_READDIR3_OK->reply.eof = TRUE;
} else {
RES_READDIR3_OK->reply.entries = tracker.entries;
RES_READDIR3_OK->reply.eof = eod_met;
}
nfs_SetPostOpAttr(dir_obj, &RES_READDIR3_OK->dir_attributes, NULL);
memcpy(RES_READDIR3_OK->cookieverf, cookie_verifier,
sizeof(cookieverf3));
res->res_readdir3.status = NFS3_OK;
rc = NFS_REQ_OK;
out:
/* return references */
if (dir_obj)
dir_obj->obj_ops.put_ref(dir_obj);
if (parent_dir_obj)
parent_dir_obj->obj_ops.put_ref(parent_dir_obj);
/* Deallocate memory in the event of an error */
if (((res->res_readdir3.status != NFS3_OK) || (rc != NFS_REQ_OK) ||
((num_entries == 0) && (cookie > 1))) &&
(tracker.entries != NULL)) {
free_entry3s(tracker.entries);
RES_READDIR3_OK->reply.entries = NULL;
}
return rc;
} /* nfs3_readdir */
int nfs3_lookup(nfs_arg_t *arg, struct svc_req *req, nfs_res_t *res)
{
struct fsal_obj_handle *obj_dir = NULL;
struct fsal_obj_handle *obj_file = NULL;
fsal_status_t fsal_status;
char *name = NULL;
int rc = NFS_REQ_OK;
struct attrlist attrs;
/* We have the option of not sending attributes, so set ATTR_RDATTR_ERR.
*/
fsal_prepare_attrs(&attrs, ATTRS_NFS3 | ATTR_RDATTR_ERR);
if (isDebug(COMPONENT_NFSPROTO)) {
char str[LEN_FH_STR];
name = arg->arg_lookup3.what.name;
nfs_FhandleToStr(req->rq_msg.cb_vers,
&(arg->arg_lookup3.what.dir),
NULL, str);
LogDebug(COMPONENT_NFSPROTO,
"REQUEST PROCESSING: Calling nfs_Lookup handle: %s name: %s",
str, name);
}
/* to avoid setting it on each error case */
res->res_lookup3.LOOKUP3res_u.resfail.dir_attributes.attributes_follow =
FALSE;
obj_dir = nfs3_FhandleToCache(&arg->arg_lookup3.what.dir,
&res->res_lookup3.status,
&rc);
if (obj_dir == NULL) {
/* Status and rc have been set by nfs3_FhandleToCache */
goto out;
}
name = arg->arg_lookup3.what.name;
fsal_status = fsal_lookup(obj_dir, name, &obj_file, &attrs);
if (FSAL_IS_ERROR(fsal_status)) {
/* If we are here, there was an error */
if (nfs_RetryableError(fsal_status.major)) {
rc = NFS_REQ_DROP;
goto out;
}
res->res_lookup3.status = nfs3_Errno_status(fsal_status);
nfs_SetPostOpAttr(obj_dir,
&res->res_lookup3.LOOKUP3res_u.resfail.
dir_attributes,
NULL);
} else {
/* Build FH */
if (nfs3_FSALToFhandle(
true,
&res->res_lookup3.LOOKUP3res_u.resok.object,
obj_file,
op_ctx->ctx_export)) {
/* Build entry attributes */
nfs_SetPostOpAttr(obj_file,
&res->res_lookup3.LOOKUP3res_u.
resok.obj_attributes,
&attrs);
/* Build directory attributes */
nfs_SetPostOpAttr(obj_dir,
&res->res_lookup3.
LOOKUP3res_u.resok.dir_attributes,
NULL);
res->res_lookup3.status = NFS3_OK;
} else {
res->res_lookup3.status = NFS3ERR_BADHANDLE;
}
}
rc = NFS_REQ_OK;
out:
/* Release the attributes. */
fsal_release_attrs(&attrs);
/* return references */
if (obj_dir)
obj_dir->obj_ops.put_ref(obj_dir);
if (obj_file)
obj_file->obj_ops.put_ref(obj_file);
return rc;
} /* nfs3_lookup */
int nfs3_fsstat(nfs_arg_t *arg, struct svc_req *req, nfs_res_t *res)
{
fsal_dynamicfsinfo_t dynamicinfo;
fsal_status_t fsal_status;
struct fsal_obj_handle *obj = NULL;
int rc = NFS_REQ_OK;
if (isDebug(COMPONENT_NFSPROTO)) {
char str[LEN_FH_STR];
nfs_FhandleToStr(req->rq_msg.cb_vers,
&(arg->arg_fsstat3.fsroot),
NULL, str);
LogDebug(COMPONENT_NFSPROTO,
"REQUEST PROCESSING: Calling nfs3_fsstat handle: %s",
str);
}
/* to avoid setting it on each error case */
res->res_fsstat3.FSSTAT3res_u.resfail.obj_attributes.attributes_follow =
FALSE;
obj = nfs3_FhandleToCache(&arg->arg_fsstat3.fsroot,
&res->res_fsstat3.status,
&rc);
if (obj == NULL) {
/* Status and rc have been set by nfs3_FhandleToCache */
return rc;
}
/* Get statistics and convert from FSAL */
fsal_status = fsal_statfs(obj, &dynamicinfo);
if (FSAL_IS_ERROR(fsal_status)) {
/* At this point we met an error */
LogFullDebug(COMPONENT_NFSPROTO,
"failed statfs: fsal_status=%s",
fsal_err_txt(fsal_status));
if (nfs_RetryableError(fsal_status.major)) {
/* Drop retryable errors. */
rc = NFS_REQ_DROP;
} else {
res->res_fsstat3.status =
nfs3_Errno_status(fsal_status);
rc = NFS_REQ_OK;
}
goto out;
}
LogFullDebug(COMPONENT_NFSPROTO,
"nfs_Fsstat --> dynamicinfo.total_bytes=%" PRIu64
" dynamicinfo.free_bytes=%" PRIu64
" dynamicinfo.avail_bytes=%" PRIu64,
dynamicinfo.total_bytes, dynamicinfo.free_bytes,
dynamicinfo.avail_bytes);
LogFullDebug(COMPONENT_NFSPROTO,
"nfs_Fsstat --> dynamicinfo.total_files=%" PRIu64
" dynamicinfo.free_files=%" PRIu64
" dynamicinfo.avail_files=%" PRIu64,
dynamicinfo.total_files, dynamicinfo.free_files,
dynamicinfo.avail_files);
nfs_SetPostOpAttr(obj,
&res->res_fsstat3.FSSTAT3res_u.resok.obj_attributes,
NULL);
res->res_fsstat3.FSSTAT3res_u.resok.tbytes = dynamicinfo.total_bytes;
res->res_fsstat3.FSSTAT3res_u.resok.fbytes = dynamicinfo.free_bytes;
res->res_fsstat3.FSSTAT3res_u.resok.abytes = dynamicinfo.avail_bytes;
res->res_fsstat3.FSSTAT3res_u.resok.tfiles = dynamicinfo.total_files;
res->res_fsstat3.FSSTAT3res_u.resok.ffiles = dynamicinfo.free_files;
res->res_fsstat3.FSSTAT3res_u.resok.afiles = dynamicinfo.avail_files;
/* volatile FS */
res->res_fsstat3.FSSTAT3res_u.resok.invarsec = 0;
res->res_fsstat3.status = NFS3_OK;
LogFullDebug(COMPONENT_NFSPROTO,
"nfs_Fsstat --> tbytes=%llu fbytes=%llu abytes=%llu",
res->res_fsstat3.FSSTAT3res_u.resok.tbytes,
res->res_fsstat3.FSSTAT3res_u.resok.fbytes,
res->res_fsstat3.FSSTAT3res_u.resok.abytes);
LogFullDebug(COMPONENT_NFSPROTO,
"nfs_Fsstat --> tfiles=%llu fffiles=%llu afiles=%llu",
res->res_fsstat3.FSSTAT3res_u.resok.tfiles,
res->res_fsstat3.FSSTAT3res_u.resok.ffiles,
res->res_fsstat3.FSSTAT3res_u.resok.afiles);
rc = NFS_REQ_OK;
out:
/* return references */
obj->obj_ops.put_ref(obj);
return rc;
} /* nfs3_fsstat */
