int nfs4_op_savefh(struct nfs_argop4 *op, compound_data_t * data, struct nfs_resop4 *resp)
{
int error;
/* First of all, set the reply to zero to make sure it contains no parasite information */
memset(resp, 0, sizeof(struct nfs_resop4));
resp->resop = NFS4_OP_SAVEFH;
resp->nfs_resop4_u.opsavefh.status = NFS4_OK;
/* If there is no currentFH, teh return an error */
if(nfs4_Is_Fh_Empty(&(data->currentFH)))
{
/* There is no current FH, return NFS4ERR_NOFILEHANDLE */
resp->nfs_resop4_u.opsavefh.status = NFS4ERR_NOFILEHANDLE;
return NFS4ERR_NOFILEHANDLE;
}
/* If the filehandle is invalid */
if(nfs4_Is_Fh_Invalid(&(data->currentFH)))
{
resp->nfs_resop4_u.opgetfh.status = NFS4ERR_BADHANDLE;
return NFS4ERR_BADHANDLE;
}
/* Tests if teh Filehandle is expired (for volatile filehandle) */
if(nfs4_Is_Fh_Expired(&(data->currentFH)))
{
resp->nfs_resop4_u.opgetfh.status = NFS4ERR_FHEXPIRED;
return NFS4ERR_FHEXPIRED;
}
/* If the savefh is not allocated, do it now */
if(data->savedFH.nfs_fh4_len == 0)
{
if((error = nfs4_AllocateFH(&(data->savedFH))) != NFS4_OK)
{
resp->nfs_resop4_u.opsavefh.status = error;
return error;
}
}
/* Copy the data from current FH to saved FH */
memcpy((char *)(data->savedFH.nfs_fh4_val), (char *)(data->currentFH.nfs_fh4_val),
data->currentFH.nfs_fh4_len);
/* Keep the vnodep in mind */
data->saved_entry = data->current_entry;
data->saved_filetype = data->current_filetype;
if(isFullDebug(COMPONENT_NFS_V4))
{
char str[LEN_FH_STR];
sprint_fhandle4(str, &data->savedFH);
LogFullDebug(COMPONENT_NFS_V4, "SAVE FH: Saved FH %s", str);
}
return NFS4_OK;
} /* nfs4_op_savefh */
/**
*
* print_compound_fh
*
* This routine prints all the file handle within a compoud request's data structure.
*
* @param data [IN] compound's data to manage.
*
* @return nothing (void function).
*
*/
void LogCompoundFH(compound_data_t * data)
{
if(isFullDebug(COMPONENT_FILEHANDLE))
{
char str[LEN_FH_STR];
sprint_fhandle4(str, &data->currentFH);
LogFullDebug(COMPONENT_FILEHANDLE, "Current FH %s", str);
sprint_fhandle4(str, &data->savedFH);
LogFullDebug(COMPONENT_FILEHANDLE, "Saved FH %s", str);
sprint_fhandle4(str, &data->publicFH);
LogFullDebug(COMPONENT_FILEHANDLE, "Public FH %s", str);
sprint_fhandle4(str, &data->rootFH);
LogFullDebug(COMPONENT_FILEHANDLE, "Root FH %s", str);
}
} /* print_compoud_fh */
/**
*
* print_fhandle4
*
* This routine prints a NFSv4 file handle (for debugging purpose)
*
* @param fh [IN] file handle to print.
*
* @return nothing (void function).
*
*/
void print_fhandle4(log_components_t component, nfs_fh4 *fh)
{
if(isFullDebug(component))
{
char str[LEN_FH_STR];
sprint_fhandle4(str, fh);
LogFullDebug(component, "%s", str);
}
} /* print_fhandle4 */
/**
*
* nfs4_op_getattr: Gets attributes for an entry in the FSAL.
*
* Gets attributes for an entry in the FSAL.
*
* @param op [IN] pointer to nfs4_op arguments
* @param data [INOUT] Pointer to the compound request's data
* @param resp [IN] Pointer to nfs4_op results
*
* @return NFS4_OK
*
*/
int nfs4_op_getattr(struct nfs_argop4 *op,
compound_data_t * data, struct nfs_resop4 *resp)
{
fsal_attrib_list_t attr;
cache_inode_status_t cache_status;
char __attribute__ ((__unused__)) funcname[] = "nfs4_op_getattr";
/* This is a NFS4_OP_GETTAR */
resp->resop = NFS4_OP_GETATTR;
/* If there is no FH */
if(nfs4_Is_Fh_Empty(&(data->currentFH)))
{
res_GETATTR4.status = NFS4ERR_NOFILEHANDLE;
return NFS4ERR_NOFILEHANDLE;
}
/* If the filehandle is invalid */
if(nfs4_Is_Fh_Invalid(&(data->currentFH)))
{
res_GETATTR4.status = NFS4ERR_BADHANDLE;
return NFS4ERR_BADHANDLE;
}
/* Tests if teh Filehandle is expired (for volatile filehandle) */
if(nfs4_Is_Fh_Expired(&(data->currentFH)))
{
res_GETATTR4.status = NFS4ERR_FHEXPIRED;
return NFS4ERR_FHEXPIRED;
}
/* Pseudo Fs management */
if(nfs4_Is_Fh_Pseudo(&(data->currentFH)))
return nfs4_op_getattr_pseudo(op, data, resp);
/* If Filehandle points to a xattr object, manage it via the xattrs specific functions */
if(nfs4_Is_Fh_Xattr(&(data->currentFH)))
return nfs4_op_getattr_xattr(op, data, resp);
if(isFullDebug(COMPONENT_NFS_V4))
{
char str[LEN_FH_STR];
sprint_fhandle4(str, &data->currentFH);
LogFullDebug(COMPONENT_NFS_V4, "NFS4_OP_GETATTR: Current FH %s", str);
}
/* Sanity check: if no attributes are wanted, nothing is to be done.
* In this case NFS4_OK is to be returned */
if(arg_GETATTR4.attr_request.bitmap4_len == 0)
{
res_GETATTR4.status = NFS4_OK;
return res_GETATTR4.status;
}
/* Get only attributes that are allowed to be read */
if(!nfs4_Fattr_Check_Access_Bitmap(&arg_GETATTR4.attr_request, FATTR4_ATTR_READ))
{
res_GETATTR4.status = NFS4ERR_INVAL;
return res_GETATTR4.status;
}
if( !nfs4_bitmap4_Remove_Unsupported( &arg_GETATTR4.attr_request ) )
{
res_GETATTR4.status = NFS4ERR_SERVERFAULT ;
return res_GETATTR4.status;
}
/*
* Get attributes.
*/
if(cache_inode_getattr(data->current_entry,
&attr,
data->ht,
data->pclient,
data->pcontext, &cache_status) == CACHE_INODE_SUCCESS)
{
if(nfs4_FSALattr_To_Fattr(data->pexport,
&attr,
&(res_GETATTR4.GETATTR4res_u.resok4.obj_attributes),
data,
&(data->currentFH), &(arg_GETATTR4.attr_request)) != 0)
res_GETATTR4.status = NFS4ERR_SERVERFAULT;
else
res_GETATTR4.status = NFS4_OK;
return res_GETATTR4.status;
}
res_GETATTR4.status = nfs4_Errno(cache_status);
return res_GETATTR4.status;
} /* nfs4_op_getattr */
int nfs4_op_savefh(struct nfs_argop4 *op, compound_data_t *data,
struct nfs_resop4 *resp)
{
SAVEFH4res * const res_SAVEFH = &resp->nfs_resop4_u.opsavefh;
/* First of all, set the reply to zero to make sure it contains no
* parasite information
*/
memset(resp, 0, sizeof(struct nfs_resop4));
resp->resop = NFS4_OP_SAVEFH;
res_SAVEFH->status = NFS4_OK;
/* Do basic checks on a filehandle */
res_SAVEFH->status = nfs4_sanity_check_FH(data, NO_FILE_TYPE, true);
if (res_SAVEFH->status != NFS4_OK)
return res_SAVEFH->status;
/* If the savefh is not allocated, do it now */
if (data->savedFH.nfs_fh4_val == NULL)
nfs4_AllocateFH(&data->savedFH);
/* Determine if we can get a new export reference. If there is
* no op_ctx->ctx_export, don't get a reference.
*/
if (op_ctx->ctx_export != NULL) {
if (!export_ready(op_ctx->ctx_export)) {
/* The CurrentFH export has gone bad. */
res_SAVEFH->status = NFS4ERR_STALE;
return res_SAVEFH->status;
}
get_gsh_export_ref(op_ctx->ctx_export);
}
/* Copy the data from current FH to saved FH */
memcpy(data->savedFH.nfs_fh4_val,
data->currentFH.nfs_fh4_val,
data->currentFH.nfs_fh4_len);
data->savedFH.nfs_fh4_len = data->currentFH.nfs_fh4_len;
/* If saved and current entry are equal, skip the following. */
if (data->saved_obj != data->current_obj) {
set_saved_entry(data, data->current_obj);
/* Make SAVEFH work right for DS handle */
if (data->current_ds != NULL) {
data->saved_ds = data->current_ds;
ds_handle_get_ref(data->saved_ds);
}
}
/* Save the current stateid */
data->saved_stateid = data->current_stateid;
data->saved_stateid_valid = data->current_stateid_valid;
/* If old SavedFH had a related export, release reference. */
if (data->saved_export != NULL)
put_gsh_export(data->saved_export);
/* Save the export information (reference already taken above). */
data->saved_export = op_ctx->ctx_export;
data->saved_export_perms = *op_ctx->export_perms;
if (isFullDebug(COMPONENT_NFS_V4)) {
char str[LEN_FH_STR];
sprint_fhandle4(str, &data->savedFH);
LogFullDebug(COMPONENT_NFS_V4, "SAVE FH: Saved FH %s", str);
}
res_SAVEFH->status = NFS4_OK;
return NFS4_OK;
} /* nfs4_op_savefh */
int nfs4_op_restorefh(struct nfs_argop4 *op,
compound_data_t * data, struct nfs_resop4 *resp)
{
char __attribute__ ((__unused__)) funcname[] = "nfs4_op_restorefh";
/* First of all, set the reply to zero to make sure it contains no
parasite information */
memset(resp, 0, sizeof(struct nfs_resop4));
resp->resop = NFS4_OP_RESTOREFH;
res_RESTOREFH.status = NFS4_OK;
/* If there is no currentFH, teh return an error */
if(nfs4_Is_Fh_Empty(&(data->savedFH)))
{
/* There is no current FH, return NFS4ERR_RESTOREFH (cg RFC3530,
page 202) */
res_RESTOREFH.status = NFS4ERR_RESTOREFH;
return res_RESTOREFH.status;
}
/* If the filehandle is invalid */
if(nfs4_Is_Fh_Invalid(&(data->savedFH)))
{
res_RESTOREFH.status = NFS4ERR_BADHANDLE;
return res_RESTOREFH.status;
}
/* Tests if the Filehandle is expired (for volatile filehandle) */
if(nfs4_Is_Fh_Expired(&(data->savedFH)))
{
res_RESTOREFH.status = NFS4ERR_FHEXPIRED;
return res_RESTOREFH.status;
}
/* If data->exportp is null, a junction from pseudo fs was
traversed, credp and exportp have to be updated */
if(data->pexport == NULL)
{
res_RESTOREFH.status = nfs4_SetCompoundExport(data);
if(res_RESTOREFH.status != NFS4_OK)
{
LogCrit(COMPONENT_NFS_V4,
"Error %d in nfs4_SetCompoundExport", res_RESTOREFH.status);
return res_RESTOREFH.status;
}
}
/* Copy the data from current FH to saved FH */
memcpy(data->currentFH.nfs_fh4_val,
data->savedFH.nfs_fh4_val,
data->savedFH.nfs_fh4_len);
data->currentFH.nfs_fh4_len = data->savedFH.nfs_fh4_len;
/* If current and saved entry are identical, get no references and
make no changes. */
if (data->current_entry == data->saved_entry) {
goto out;
}
if (data->current_entry) {
cache_inode_put(data->current_entry);
data->current_entry = NULL;
}
data->current_entry = data->saved_entry;
data->current_filetype = data->saved_filetype;
/* Take another reference. As of now the filehandle is both saved
and current and both must be counted. Protect in case of
pseudofs handle. */
if (data->current_entry) {
if (cache_inode_lru_ref(data->current_entry,
LRU_FLAG_NONE) != CACHE_INODE_SUCCESS) {
resp->nfs_resop4_u.opgetfh.status = NFS4ERR_STALE;
data->current_entry = NULL;
return resp->nfs_resop4_u.opgetfh.status;
}
}
out:
if(isFullDebug(COMPONENT_NFS_V4))
{
char str[LEN_FH_STR];
sprint_fhandle4(str, &data->currentFH);
LogFullDebug(COMPONENT_NFS_V4,
"RESTORE FH: Current FH %s", str);
}
return NFS4_OK;
} /* nfs4_op_restorefh */
int nfs4_op_restorefh(struct nfs_argop4 *op, compound_data_t *data,
struct nfs_resop4 *resp)
{
RESTOREFH4res * const res_RESTOREFH = &resp->nfs_resop4_u.oprestorefh;
/* First of all, set the reply to zero to make sure it contains no
parasite information */
memset(resp, 0, sizeof(struct nfs_resop4));
resp->resop = NFS4_OP_RESTOREFH;
res_RESTOREFH->status = NFS4_OK;
LogFullDebugOpaque(COMPONENT_FILEHANDLE,
"Saved FH %s",
LEN_FH_STR,
data->savedFH.nfs_fh4_val,
data->savedFH.nfs_fh4_len);
/* If there is no savedFH, then return an error */
if (nfs4_Is_Fh_Empty(&(data->savedFH)) == NFS4ERR_NOFILEHANDLE) {
/* There is no current FH, return NFS4ERR_RESTOREFH
* (cg RFC3530, page 202)
*/
res_RESTOREFH->status = NFS4ERR_RESTOREFH;
return res_RESTOREFH->status;
}
/* Do basic checks on saved filehandle */
res_RESTOREFH->status =
nfs4_sanity_check_saved_FH(data, NO_FILE_TYPE, true);
if (res_RESTOREFH->status != NFS4_OK)
return res_RESTOREFH->status;
/* Determine if we can get a new export reference. If there is
* no saved export, don't get a reference to it.
*/
if (data->saved_export != NULL) {
if (!export_ready(data->saved_export)) {
/* The SavedFH export has gone bad. */
res_RESTOREFH->status = NFS4ERR_STALE;
return res_RESTOREFH->status;
}
get_gsh_export_ref(data->saved_export);
}
/* Copy the data from saved FH to current FH */
memcpy(data->currentFH.nfs_fh4_val, data->savedFH.nfs_fh4_val,
data->savedFH.nfs_fh4_len);
data->currentFH.nfs_fh4_len = data->savedFH.nfs_fh4_len;
if (op_ctx->ctx_export != NULL)
put_gsh_export(op_ctx->ctx_export);
/* Restore the export information */
op_ctx->ctx_export = data->saved_export;
if (op_ctx->ctx_export != NULL)
op_ctx->fsal_export = op_ctx->ctx_export->fsal_export;
*op_ctx->export_perms = data->saved_export_perms;
/* No need to call nfs4_SetCompoundExport or nfs4_MakeCred
* because we are restoring saved information, and the
* credential checking may be skipped.
*/
/* Update the current entry */
set_current_entry(data, data->saved_obj);
/* Restore the saved stateid */
data->current_stateid = data->saved_stateid;
data->current_stateid_valid = data->saved_stateid_valid;
/* Make RESTOREFH work right for DS handle */
if (data->current_ds != NULL) {
data->current_ds = data->saved_ds;
data->current_filetype = data->saved_filetype;
ds_handle_get_ref(data->current_ds);
}
if (isFullDebug(COMPONENT_NFS_V4)) {
char str[LEN_FH_STR];
sprint_fhandle4(str, &data->currentFH);
LogFullDebug(COMPONENT_NFS_V4,
"RESTORE FH: Current FH %s",
str);
}
return NFS4_OK;
} /* nfs4_op_restorefh */
