a correction here ')' char *buffer = (char *) malloc( count * (sizeof(char) + 1))
From: [email protected] To: [email protected] Subject: RE: [Pvfs2-users] PVFS_isys_io call: Invalid argument Date: Mon, 20 Feb 2012 20:21:23 +0200 CC: [email protected] Hello and thanks for replying, i already did that char *buffer = (char *) malloc( count * (sizeof(char) + 1) but it didn't work too Have you compiled it at all? Does it work for you? I'm sure i've made a mistake in the code, but i can't find it and i have to find it as soon as possible cause i need it May you please help me? Thanks Date: Mon, 20 Feb 2012 09:58:41 -0500 Subject: Re: [Pvfs2-users] PVFS_isys_io call: Invalid argument From: [email protected] To: [email protected] CC: [email protected] See below for correction. Becky 2012/2/19 g_p g_p <[email protected]> Hello, i'm trying to create a file and read from it.The creation is working fine. When i'm trying to read the file, i get an error when i call the "pvfs_sys_read" invalid (NULL) required argumentPVFS_isys_io call: Invalid argumentPVFS_sys_read : Invalid argument (error class: 0) The problem is in the following line: " ret = PVFS_sys_read(resp_create.ref, file_req, 0,buffer, mem_req, &credentials, &resp_io, hints);"I can't understand which one of the arguments is causing the problem,can you understand?How can i solve it? The program is as follows: #include <stdio.h>#include <stdlib.h>#include <unistd.h>#include <limits.h>#include <string.h> #include <sys/time.h>#include <sys/types.h>#include <sys/stat.h>#include <fcntl.h>#include <time.h>#include <libgen.h> #include <getopt.h>#include "pvfs2.h" #include "str-utils.h"#include "pint-sysint-utils.h"#include "pvfs2-internal.h" #include "pvfs2-hint.h" int main(void) { int ret = -1; PVFS_sys_layout layout; layout.algorithm = PVFS_SYS_LAYOUT_ROUND_ROBIN; layout.server_list.count = 0; layout.server_list.servers = NULL; /* Initialize the pvfs2 server */ ret = PVFS_util_init_defaults(); if(ret < 0) { PVFS_perror("PVFS_util_init_defaults", ret); return -1; } int rc; int num_segs; char *working_file = "test2.txt"; char directory[PVFS_NAME_MAX] = "/mnt/pvfs2/testDir/"; char filename[PVFS_SEGMENT_MAX]; layout.algorithm = PVFS_SYS_LAYOUT_ROUND_ROBIN; layout.server_list.count = 0; if(layout.server_list.servers) { free(layout.server_list.servers); } layout.server_list.servers = NULL; char pvfs_path[PVFS_NAME_MAX] = {0}; PVFS_fs_id cur_fs; PVFS_sysresp_lookup resp_lookup; PVFS_sysresp_create resp_create; PVFS_credentials credentials; PVFS_object_ref parent_ref; PVFS_sys_attr attr; /* Translate path into pvfs2 relative path */ rc = PINT_get_base_dir(working_file, directory, PVFS_NAME_MAX); num_segs = PINT_string_count_segments(working_file); rc = PINT_get_path_element(working_file, num_segs - 1,filename, PVFS_SEGMENT_MAX); if (rc) { fprintf(stderr, "Unknown path format: %s\n", working_file); ret = -1; } rc = PVFS_util_resolve(directory, &cur_fs,pvfs_path, PVFS_NAME_MAX); if (rc) { PVFS_perror("PVFS_util_resolve", rc); ret = -1; } PVFS_util_gen_credentials(&credentials); memset(&resp_lookup, 0, sizeof(PVFS_sysresp_lookup)); rc = PVFS_sys_lookup(cur_fs, pvfs_path, &credentials,&resp_lookup, PVFS2_LOOKUP_LINK_NO_FOLLOW, NULL); if (rc) { PVFS_perror("PVFS_sys_lookup", rc); ret = -1; } /* Set attributes */ imemset(&attr, 0, sizeof(PVFS_sys_attr)); attr.owner = credentials.uid; attr.group = credentials.gid; attr.perms = 0777; attr.atime = time(NULL); attr.mtime = attr.atime; attr.mask = PVFS_ATTR_SYS_ALL_SETABLE; attr.dfile_count = 0; parent_ref = resp_lookup.ref; layout.algorithm = PVFS_SYS_LAYOUT_RANDOM; lrc = PVFS_sys_create(filename, parent_ref, attr, parent_ref, attr, &credentials, NULL, &resp_create, &layout, NULL); if (rc) { fprintf(stderr, "Error: An error occurred while creating %s\n",working_file); PVFS_perror("PVFS_sys_create", rc); ret = -1; } /* Everthing fine till here! */ PVFS_Request mem_req, file_req; PVFS_sysresp_io resp_io; /********* buffer needs to be allocated, at least 100 bytes in your case, then you can send in the ********* pointer to the PVFS_sys_read call. char * buffer; *************/ size_t count = 100; int64_t offset; PVFS_hint hints = NULL; file_req = PVFS_BYTE; ret = PVFS_Request_contiguous(count, PVFS_BYTE, &mem_req); if (ret < 0) { fprintf(stderr, "Error: PVFS_Request_contiguous failure\n"); return (ret); } ret = PVFS_sys_read(resp_create.ref, file_req, 0,buffer, mem_req, &credentials, &resp_io, hints); /* problem here!!! */ if (ret == 0) { PVFS_Request_free(&mem_req); } else { PVFS_perror("PVFS_sys_read === ", ret); printf("ret = %d\n",ret); } PVFS_sys_finalize(); } Can you understand where the problem is?Where is that NULL value that causes the problem? Thanks, in advance _______________________________________________ Pvfs2-users mailing list [email protected] http://www.beowulf-underground.org/mailman/listinfo/pvfs2-users -- Becky Ligon OrangeFS Support and Development Omnibond Systems Anderson, South Carolina _______________________________________________ Pvfs2-users mailing list [email protected] http://www.beowulf-underground.org/mailman/listinfo/pvfs2-users
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