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srb_cdmi.c
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/*
* Copyright (C) 2014 SCALITY SA - http://www.scality.com
* Copyright 1997-2000, 2008 Pavel Machek <[email protected]>
* Parts copyright 2001 Steven Whitehouse <[email protected]>
*
* This file is part of ScalityRestBlock.
*
* ScalityRestBlock is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* ScalityRestBlock is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with ScalityRestBlock. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <linux/module.h> // included for all kernel modules
#include <linux/kernel.h> // included for KERN_INFO
#include <linux/types.h> // for uintx_t
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/socket.h>
#include <linux/tcp.h>
#include "srb.h"
#include "jsmn/jsmn.h"
/* TODO: add username and password support */
#define CDMI_DISCONNECTED 0
#define CDMI_CONNECTED 1
#define PROTO_HTTP "http://"
static int is_digit(char c)
{
if ((c >= '0') && (c <= '9'))
return 1;
return 0;
}
static int ip_valid_char(char c)
{
if (is_digit(c))
return 1;
if (c == '.')
return 1;
return 0;
}
/* This helper copies the ip part of the remaining url in buffer
* pointed by ip.
* In case of success get_ip() returns the number of bytes read from
* url, it returns 0 otherwise.
*/
static int get_ip(const char *url, char *ip)
{
int i;
for (i = 0; i < 15; i++) {
/* End of hostname part */
if ((url[i] == ':') || (url[i] == '/'))
break;
/* allowed chars 0-9 and . */
if (!ip_valid_char(url[i]))
return 0;
*ip = url[i];
ip++;
}
*ip = 0;
if ((url[i] != ':') && (url[i] != '/'))
return 0;
return i;
}
static int get_port(const char *url, int *port)
{
int i;
*port = 0;
for (i = 0; is_digit(url[i]); i++)
{
*port *= 10;
*port += url[i] - '0';
}
return i;
}
/* srb_cdmi_init (URL)
*
* Parse url and initialise cdmi structure in all threads descriptors
*
*/
int srb_cdmi_init(srb_debug_t *dbg,
struct srb_cdmi_desc_s *desc,
const char *url)
{
/* 1 1 */
/* 123456789012345 */
/* 255.255.255.255 */
char ip[16];
int ret;
int port = 80;
desc->filename[0] = 0;
*ip = 0;
strncpy(desc->url, url, SRB_URL_SIZE);
desc->url[SRB_URL_SIZE] = 0;
/* Only 'http://' supported for the moment */
if (strncmp(url, PROTO_HTTP, strlen(PROTO_HTTP)))
return -EINVAL;
url += strlen(PROTO_HTTP);
ret = get_ip(url, ip);
if (ret == 0)
return -EINVAL;
url += ret;
/* Decode optional port number*/
if (url[0] == ':') {
url++;
ret = get_port(url, &port);
if (ret == 0) {
return -EINVAL;
}
url += ret;
}
/* Now we should get the page '/mypage' */
if (url[0] != '/') {
return -EINVAL;
}
strcpy(desc->filename, url);
strcpy(desc->ip_addr, ip);
desc->port = port;
desc->state = CDMI_DISCONNECTED;
SRB_LOG_DEBUG(dbg->level, "Decoded URL [ip=%s port=%d file=%s]",
desc->ip_addr, desc->port, desc->filename);
return 0;
}
/* srb_cdmi_connect
*
* Connect thread pools descriptors
*
* Returns 0 if successfull or a negative value depending the error.
*/
int srb_cdmi_connect(srb_debug_t *dbg,
struct srb_cdmi_desc_s *desc)
{
int ret;
int arg = 1;
if (!desc)
return -EINVAL;
if (desc->state == CDMI_CONNECTED)
return 0;
/* Init socket */
ret = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &desc->socket);
if (ret < 0) {
SRB_LOG_ERR(dbg->level, "Unable to create socket: %d", ret);
goto out_error;
}
memset(&desc->sockaddr, 0, sizeof(desc->sockaddr));
/* Connecting socket */
desc->sockaddr.sin_family = AF_INET;
desc->sockaddr.sin_addr.s_addr = in_aton(desc->ip_addr);
desc->sockaddr.sin_port = htons(desc->port);
ret = desc->socket->ops->connect(desc->socket,
(struct sockaddr*)&desc->sockaddr,
sizeof(struct sockaddr_in), !O_NONBLOCK);
if (ret < 0) {
SRB_LOG_ERR(dbg->level, "Unable to connect to cdmi server: %d", ret);
goto out_error;
}
desc->state = CDMI_CONNECTED;
ret = kernel_setsockopt(desc->socket,
IPPROTO_TCP, TCP_NODELAY, (char *)&arg,
sizeof(arg));
if (ret < 0) {
SRB_LOG_ERR(dbg->level, "setsockopt failed: %d", ret);
goto out_error;
}
if (desc->timeout.tv_sec > 0) {
SRB_LOG_DEBUG(dbg->level, "srb_cdmi_connect: set socket timeout %lu", desc->timeout.tv_sec);
ret = kernel_setsockopt(desc->socket, SOL_SOCKET, SO_RCVTIMEO,
(char *)&desc->timeout, sizeof(struct timeval));
if (ret < 0) {
SRB_LOG_ERR(dbg->level, "Failed to set socket receive timeout value: %d", ret);
}
ret = kernel_setsockopt(desc->socket, SOL_SOCKET, SO_SNDTIMEO, (char *)&desc->timeout, sizeof(struct timeval));
if (ret < 0) {
SRB_LOG_ERR(dbg->level, "Failed to set socket send timeout value: %d", ret);
}
}
/* As we established a new connection, reset the number of
HTTP requests sent */
desc->nb_requests = 0;
return 0;
out_error:
if (desc->socket) {
kernel_sock_shutdown(desc->socket, SHUT_RDWR);
sock_release(desc->socket);
}
desc->socket = NULL;
desc->state = CDMI_DISCONNECTED;
return ret;
}
/* srb_cdmi_disconnect
*
* Disctonnect current descriptor from CDMI server
*
*/
int srb_cdmi_disconnect(srb_debug_t *dbg,
struct srb_cdmi_desc_s *desc)
{
if (!desc)
return -EINVAL;
if (!desc->socket || desc->state == CDMI_DISCONNECTED)
return 0;
kernel_sock_shutdown(desc->socket, SHUT_RDWR);
sock_release(desc->socket);
desc->socket = NULL;
desc->state = CDMI_DISCONNECTED;
return 0;
}
/*
* Send or receive packet.
*/
static int sock_xmit(srb_debug_t *dbg,
struct srb_cdmi_desc_s *desc,
int send,
void *buf, int size,
int strict_receive)
{
int result;
struct msghdr msg;
struct kvec iov;
sigset_t blocked, oldset;
unsigned long pflags = current->flags;
if (unlikely(!desc->socket)) {
SRB_LOG_ERR(dbg->level, "Attempted %s on closed socket in sock_xmit\n",
(send ? "send" : "recv"));
return -EINVAL;
}
/* Allow interception of SIGKILL only
* Don't allow other signals to interrupt the transmission */
siginitsetinv(&blocked, sigmask(SIGKILL));
sigprocmask(SIG_SETMASK, &blocked, &oldset);
current->flags |= PF_MEMALLOC;
do {
desc->socket->sk->sk_allocation = GFP_NOIO | __GFP_MEMALLOC;
iov.iov_base = buf;
iov.iov_len = size;
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_control = NULL;
msg.msg_controllen = 0;
msg.msg_flags = MSG_NOSIGNAL;
if (send) {
result = kernel_sendmsg(desc->socket, &msg, &iov, 1, size);
SRB_LOG_DEBUG(dbg->level, "sock_xmit: Sent %d bytes->\n%.*s", result, result, (char*)buf);
} else {
result = kernel_recvmsg(desc->socket, &msg, &iov, 1, size,
msg.msg_flags);
SRB_LOG_DEBUG(dbg->level, "sock_xmit: Received %d bytes->\n%.*s", result, result, (char*)buf);
}
SRB_LOG_DEBUG(dbg->level, "Result for socket exchange: %d", result);
if (signal_pending(current)) {
siginfo_t info;
SRB_LOG_INFO(dbg->level, "srb (pid %d: %s) got signal %d\n",
task_pid_nr(current), current->comm,
dequeue_signal_lock(current, ¤t->blocked, &info));
result = -EINTR;
break;
}
if (result && (!send) && (!strict_receive))
break;
if (result == 0) {
SRB_LOG_DEBUG(dbg->level, "Empty socket exhange (size: %d)", size);
result = -EPIPE;
break;
}
if (result < 0) {
break;
}
size -= result;
buf += result;
} while (size > 0);
sigprocmask(SIG_SETMASK, &oldset, NULL);
tsk_restore_flags(current, pflags, PF_MEMALLOC);
return result;
}
static int sock_send_receive(srb_debug_t *dbg,
struct srb_cdmi_desc_s *desc,
int send_size, int rcv_size)
{
char *buff = desc->xmit_buff;
int strict_rcv = 1;
int ret = 0;
int rcvd = 0;
char *rcvbuf = NULL;
int has_epiped = 0;
if (rcv_size == 0) {
strict_rcv = 0;
rcv_size = SRB_XMIT_BUFFER_SIZE;
}
rcvbuf = vmalloc(rcv_size);
if (rcvbuf == NULL) {
ret = -ENOMEM;
goto cleanup;
}
/*
* Check if the connection needs to be restarted:
* Reconnect the socket after a predefined number of HTTP
* requests sent.
*/
if (desc->nb_requests == SRB_REUSE_LIMIT) {
SRB_LOG_DEBUG(dbg->level, "Limit of %u requests reached reconnecting socket", SRB_REUSE_LIMIT);
srb_cdmi_disconnect(dbg, desc);
}
else
desc->nb_requests++;
/*
* Reconnect whether it's been resetted manually (SRB_REUSE_LIMIT) or
* it was left disconnected
*/
if (desc->state == CDMI_DISCONNECTED) {
ret = srb_cdmi_connect(dbg, desc);
if (ret)
goto cleanup;
}
/* Send buffer */
retry_once:
ret = sock_xmit(dbg, desc, 1, buff, send_size, 0);
if (ret == -EPIPE) {
SRB_LOG_ERR(dbg->level, "Transmission error (%d), reconnecting...", ret);
srb_cdmi_disconnect(dbg, desc);
if (has_epiped == 0) {
has_epiped = 1;
ret = srb_cdmi_connect(dbg, desc);
if (ret)
goto cleanup;
goto retry_once;
}
goto cleanup;
}
if (ret != send_size) {
ret = -EIO;
goto cleanup;
}
/* Receive response - We want to make sure we received a full response */
rcvd = 0;
while (!srb_http_check_response_complete(rcvbuf, rcvd))
{
if (rcvd)
SRB_LOG_WARN(dbg->level, "Response not read fully in one go: "
"read %i bytes until now", rcvd);
ret = sock_xmit(dbg, desc, 0, rcvbuf+rcvd, rcv_size-rcvd, strict_rcv);
/* Is the connection to be reopened ? */
if (ret < 0) {
if (ret == -EPIPE) {
srb_cdmi_disconnect(dbg, desc);
if (has_epiped == 0) {
has_epiped = 1;
ret = srb_cdmi_connect(dbg, desc);
if (ret)
goto cleanup;
goto retry_once;
}
}
goto cleanup;
}
rcvd += ret;
ret = rcvd;
}
memcpy(buff, rcvbuf, rcvd);
cleanup:
if (rcvbuf)
vfree(rcvbuf);
return ret;
}
static int sock_send_sglist_receive(srb_debug_t *dbg,
struct srb_cdmi_desc_s *desc,
int send_size, int rcv_size)
{
char *buff = desc->xmit_buff;
int strict_rcv = 1;
int i;
int ret;
int rcvd;
char *rcvbuf = NULL;
int has_epiped = 0;
if (rcv_size == 0) {
strict_rcv = 0;
rcv_size = SRB_XMIT_BUFFER_SIZE;
}
rcvbuf = vmalloc(rcv_size);
if (rcvbuf == NULL) {
ret = -ENOMEM;
goto cleanup;
}
/*
* Check if the connection needs to be restarted:
* Reconnect the socket after a predefined number of HTTP
* requests sent.
*/
if (desc->nb_requests == SRB_REUSE_LIMIT) {
SRB_LOG_DEBUG(dbg->level, "Limit of %u requests reached reconnecting socket", SRB_REUSE_LIMIT);
srb_cdmi_disconnect(dbg, desc);
}
else
desc->nb_requests++;
/*
* Reconnect whether it's been resetted manually (SRB_REUSE_LIMIT) or
* it was left disconnected
*/
if (desc->state == CDMI_DISCONNECTED) {
ret = srb_cdmi_connect(dbg, desc);
if (ret)
goto cleanup;
}
/* Send buffer */
retry_once:
ret = sock_xmit(dbg, desc, 1, buff, send_size, 0);
if (ret == -EPIPE) {
SRB_LOG_ERR(dbg->level, "Transmission error (%d), reconnecting...", ret);
srb_cdmi_disconnect(dbg, desc);
if (has_epiped == 0) {
has_epiped = 1;
ret = srb_cdmi_connect(dbg, desc);
if (ret)
goto cleanup;
goto retry_once;
}
goto cleanup;
}
if (ret != send_size) {
SRB_LOG_ERR(dbg->level, "Incomplete transmission (%d of %d), returning", ret, send_size);
ret = -EIO;
goto cleanup;
}
/* Now iterate through the sglist */
for (i = 0; i < desc->sgl_size; i++) {
char *buff = sg_virt(&desc->sgl[i]);
int length = desc->sgl[i].length;
ret = sock_xmit(dbg, desc, 1, buff, length, 0);
if (ret == -EPIPE) {
SRB_LOG_ERR(dbg->level, "Transmission error (%d), reconnecting...", ret);
srb_cdmi_disconnect(dbg, desc);
if (has_epiped == 0) {
has_epiped = 1;
ret = srb_cdmi_connect(dbg, desc);
if (ret)
goto cleanup;
goto retry_once;
}
goto cleanup;
}
if (ret != length) {
SRB_LOG_ERR(dbg->level, "Incomplete transmission (%d of %d), returning",
ret, length);
ret = -EIO;
goto cleanup;
}
}
/* Receive response */
rcvd = 0;
while (!srb_http_check_response_complete(rcvbuf, rcvd))
{
if (rcvd)
SRB_LOG_WARN(dbg->level, "Response not read fully in one go: "
"read %i bytes until now", rcvd);
ret = sock_xmit(dbg, desc, 0, rcvbuf+rcvd, rcv_size-rcvd, strict_rcv);
/* Is the connection to be reopened ? */
if (ret < 0) {
if (ret == -EPIPE) {
srb_cdmi_disconnect(dbg, desc);
if (has_epiped == 0) {
has_epiped = 1;
ret = srb_cdmi_connect(dbg, desc);
if (ret)
goto cleanup;
goto retry_once;
}
}
goto cleanup;
}
rcvd += ret;
ret = rcvd;
}
memcpy(buff, rcvbuf, rcvd);
cleanup:
if (rcvbuf)
vfree(rcvbuf);
return ret;
}
static int retried_send_receive(srb_debug_t *dbg,
struct srb_cdmi_desc_s *desc,
int send_size, int rcv_size,
int do_sglist, int attempts)
{
int ret = -1;
int i;
if (attempts < 1)
return -EINVAL;
/*
* TODO: Handle Failover (Issue #20)
*
* This means that in case of EPIPE (only? more?),
* we must switch to another server url. It might require to
* be done within the callees
*/
for (i = 0; i < attempts; i++) {
if (do_sglist) {
ret = sock_send_sglist_receive(dbg, desc, send_size, rcv_size);
}
else {
ret = sock_send_receive(dbg, desc, send_size, rcv_size);
}
/* If some data is returned, then the response is whole */
if (ret >= 0)
break;
else if (i < attempts - 1)
SRB_LOG_NOTICE(dbg->level, "Retrying CDMI request... %d", (i + 1));
}
return ret;
}
int srb_cdmi_list(srb_debug_t *dbg,
struct srb_cdmi_desc_s *desc,
int (*volume_cb)(void * data, const char *),
void *cb_data)
{
jsmn_parser json_parser;
jsmntok_t *json_tokens = NULL, *json_tokens2 = NULL;
unsigned int n_tokens = 0;
jsmnerr_t json_err = JSMN_ERROR_NOMEM;
char filename[SRB_URL_SIZE+1];
char *buff = desc->xmit_buff;
enum srb_http_statuscode code;
char *content = NULL;
uint64_t contentlen;
int len;
int ret;
int array, obj, found;
int cb_errcount = 0;
if (!desc->socket)
return 0;
// Construct HTTTP GET (for listing container)
len = srb_http_mklist(buff, SRB_XMIT_BUFFER_SIZE,
desc->ip_addr, desc->filename);
if (len <= 0) return len;
len = sock_send_receive(dbg, desc, len, 0);
if (len < 0) return len;
// Check response status
ret = srb_http_get_status(buff, len, &code);
if (ret == -1)
{
SRB_LOG_ERR(dbg->level, "[list] Cannot retrieve response status");
ret = -EIO;
goto err;
}
if (code != SRB_HTTP_STATUS_OK)
{
SRB_LOG_ERR(dbg->level, "[list] Server listing yielded "
"response status %i", code);
ret = -EIO;
goto err;
}
// Get content length
ret = srb_http_header_get_uint64(buff, len,
"Content-Length", &contentlen);
if (ret)
{
SRB_LOG_ERR(dbg->level, "[list] Could not find content length in "
"response headers.");
ret = -EIO;
goto err;
}
content = vmalloc(contentlen);
if (content == NULL)
{
SRB_LOG_ERR(dbg->level, "[list] Cannot allocate enough memory to"
" read volume repository.");
ret = -ENOMEM;
goto err;
}
memset(content, 0, contentlen);
// Skip header
ret = srb_http_skipheader(&buff, &len);
if (ret) {
SRB_LOG_ERR(dbg->level, "[list] skipheader failed: %d", ret);
ret = -EIO;
goto err;
}
if (len > contentlen)
{
SRB_LOG_ERR(dbg->level, "[list] More data left than expected:"
" len=%i > contentlen=%llu", len, contentlen);
ret = -EIO;
goto err;
}
// Get body
// First, copy leftovers from buff
memcpy(content, buff, len);
if (len != contentlen) {
SRB_LOG_ERR(dbg->level, "[list] Cannot read whole listing: "
"len: %d contentlen:%llu", len, contentlen);
ret = -EIO;
goto err;
}
// Now retrieve the list of objects...
#define SRB_N_JSON_TOKENS 128
jsmn_init(&json_parser);
n_tokens = SRB_N_JSON_TOKENS;
do
{
n_tokens *= 2;
json_tokens2 = json_tokens;
json_tokens = krealloc(json_tokens2,
n_tokens * sizeof(*json_tokens),
GFP_KERNEL);
if (json_tokens != NULL)
{
json_err = jsmn_parse(&json_parser, content, contentlen,
json_tokens, n_tokens);
} else {
/* krealloc doesn't free the original */
kfree(json_tokens2);
}
} while (json_tokens != NULL
&& json_err < 0 && json_err == JSMN_ERROR_NOMEM);
if (json_err < 0)
{
if (json_tokens == NULL)
{
SRB_LOG_ERR(dbg->level, "Could not allocate enough memory to "
"parse JSON volume list.");
ret = -ENOMEM;
}
else
{
SRB_LOG_ERR(dbg->level, "Could not parse Json: error %i", json_err);
ret = -EIO;
}
goto err;
}
// Find the "children" object within json root object
// for each sub-loop, ret (aka tmp iterator) is intialized to 1
// in order to start after the object/array token it iterates within.
found = 0;
for (ret = 0; ret < json_err; ret ++)
{
jsmntok_t *objtok = &json_tokens[ret];
// Dive into root object
if (objtok->parent == -1 && objtok->type == JSMN_OBJECT)
{
obj = ret;
for (ret = 1; obj+ret < json_err; ret += 2)
{
jsmntok_t *artok = &json_tokens[obj+ret];
// Dive into key 'children' (should contain an array)
if (artok->type == JSMN_STRING
&& strncmp("children", &content[artok->start],
artok->end - artok->start) == 0
&& obj+ret < json_err
&& json_tokens[obj+ret+1].type == JSMN_ARRAY)
{
array = obj + ret + 1;
SRB_LOG_DEBUG(dbg->level, "Found children list:");
// List children of the array we found.
for (ret = 1;
array + ret < json_err
&& json_tokens[array+ret].parent == array
&& ret < DEV_MAX;
++ret)
{
len = json_tokens[array+ret].end
- json_tokens[array+ret].start;
SRB_LOG_DEBUG(dbg->level, "Volume %i: %.*s", ret, len,
&content[json_tokens[array+ret].start]);
strncpy(filename,
&content[json_tokens[array+ret].start],
SRB_MIN(SRB_URL_SIZE, len));
filename[SRB_MIN(SRB_URL_SIZE, len)] = 0;
if (volume_cb(cb_data, filename) != 0) {
cb_errcount += 1;
}
}
found = 1;
break ;
}
}
if (found)
break ;
}
}
ret = 0;
if (cb_errcount != 0)
ret = -EIO;
err:
if (json_tokens)
kfree(json_tokens);
if (content)
vfree(content);
return ret;
}
int srb_cdmi_flush(srb_debug_t *dbg,
struct srb_cdmi_desc_s *desc,
unsigned long flush_size)
{
char *buff = desc->xmit_buff;
uint64_t size;
int len;
int ret;
enum srb_http_statuscode code;
if (!desc->socket)
return 0;
/* Construct HTTP truncate */
len = srb_http_mktruncate(buff, SRB_XMIT_BUFFER_SIZE,
desc->ip_addr, desc->filename, flush_size);
if (len <= 0) return len;
len = sock_send_receive(dbg, desc, len, 0);
if (len < 0) return len;
ret = srb_http_get_status(buff, len, &code);
if (ret != 0)
{
SRB_LOG_ERR(dbg->level, "Cannot get http response status.");
return -EIO;
}
if (srb_http_get_status_range(code) != SRB_HTTP_STATUSRANGE_SUCCESS)
{
SRB_LOG_ERR(dbg->level, "Http server responded with bad status: %i", code);
if (code == SRB_HTTP_STATUS_NOT_FOUND)
return -ENODEV;
return -EIO;
}
buff[len] = 0;
ret = srb_http_header_get_uint64(buff, len, "Content-Length", &size);
if (ret)
return -EIO;
return 0;
}
int srb_cdmi_extend(srb_debug_t *dbg,
struct srb_cdmi_desc_s *desc,
unsigned long long trunc_size)
{
char *buff = desc->xmit_buff;
unsigned long long cur_size = 0;
int len;
int ret;
enum srb_http_statuscode code;
if (!desc || !desc->socket)
return -EINVAL;
ret = srb_cdmi_getsize(dbg, desc, &cur_size);
if (ret != 0) {
SRB_LOG_ERR(dbg->level, "[extend] Could not get size of existing volume.");
return ret;
}
if (cur_size >= trunc_size) {
SRB_LOG_ERR(dbg->level, "[extend] Cannot shrink a volume.");
return -EINVAL;
}
/* Construct/send HTTP truncate */
len = srb_http_mktruncate(buff, SRB_XMIT_BUFFER_SIZE,
desc->ip_addr, desc->filename, trunc_size);
if (len <= 0) return len;
len = sock_send_receive(dbg, desc, len, 0);
if (len < 0) return len;
ret = srb_http_get_status(buff, len, &code);
if (ret == -1) {
SRB_LOG_ERR(dbg->level, "[extend] Cannot retrieve response status");
return -EIO;
}
if (srb_http_get_status_range(code) != SRB_HTTP_STATUSRANGE_SUCCESS) {
SRB_LOG_ERR(dbg->level, "[extend] Status of extend operation = %i.", code);
return -EIO;
}
return 0;
}
int srb_cdmi_create(srb_debug_t *dbg,
struct srb_cdmi_desc_s *desc,
unsigned long long trunc_size)
{
char *buff = desc->xmit_buff;
int len;
int ret;
enum srb_http_statuscode code;
if (!desc || !desc->socket)
return -EINVAL;
/* Construct/send HTTP create */
len = srb_http_mkcreate(buff, SRB_XMIT_BUFFER_SIZE,
desc->ip_addr, desc->filename);
if (len <= 0) return len;
len = sock_send_receive(dbg, desc, len, 0);
if (len < 0) return len;
ret = srb_http_get_status(buff, len, &code);
if (ret == -1) {
SRB_LOG_ERR(dbg->level, "[create] Cannot retrieve response status from %.*s", 32, buff);
return -EIO;
}
if (srb_http_get_status_range(code) != SRB_HTTP_STATUSRANGE_SUCCESS) {
SRB_LOG_ERR(dbg->level, "[create] Status of create operation = %i.", code);
return -EIO;
}
/* Construct/send HTTP truncate */
len = srb_http_mktruncate(buff, SRB_XMIT_BUFFER_SIZE,
desc->ip_addr, desc->filename, trunc_size);
if (len <= 0) return len;
len = sock_send_receive(dbg, desc, len, 0);
if (len < 0) return len;
ret = srb_http_get_status(buff, len, &code);
if (ret == -1) {
SRB_LOG_ERR(dbg->level, "[create-trunc] Cannot retrieve response status");
return -EIO;
}
if (srb_http_get_status_range(code) != SRB_HTTP_STATUSRANGE_SUCCESS) {
SRB_LOG_ERR(dbg->level, "[create-trunc] Status of create operation = %i.", code);
return -EIO;
}
return 0;
}
int srb_cdmi_delete(srb_debug_t *dbg, struct srb_cdmi_desc_s *desc)
{
char *buff = desc->xmit_buff;
int len;
int ret;
enum srb_http_statuscode code;
if (!desc || !desc->socket)
return -EINVAL;
/* Construct HTTP delete */
len = srb_http_mkdelete(buff, SRB_XMIT_BUFFER_SIZE,
desc->ip_addr, desc->filename);
if (len <= 0) return len;
len = sock_send_receive(dbg, desc, len, 0);
if (len < 0) return len;
ret = srb_http_get_status(buff, len, &code);
if (ret == -1) {
SRB_LOG_ERR(dbg->level, "[destroy] Cannot retrieve response status");
return -EIO;
}
if (srb_http_get_status_range(code) != SRB_HTTP_STATUSRANGE_SUCCESS) {
SRB_LOG_ERR(dbg->level, "[destroy] Status of delete operation = %i.", code);
if (code == SRB_HTTP_STATUS_NOT_FOUND)
return -ENOENT;
return -EIO;
}
return 0;
}
/* HACK: due to a bug in HTTP HEAD from scality,using metadata instead */
#if 0
int srb_cdmi_getsize(srb_debug_t *dbg, struct srb_cdmi_desc_s *desc,
uint64_t *size)
{
char *buff = desc->xmit_buff;
int ret, len;
/* Construct a HEAD command */
len = srb_http_mkhead(buff, SRB_XMIT_BUFFER_SIZE,
desc->ip_addr, desc->filename);
if (len <= 0) return len;
len = sock_send_receive(dbg, desc, len, 0);
if (len < 0) return len;
buff[len] = 0;
ret = srb_http_header_get_uint64(buff, len, "Content-Length", size);
if (ret)
return -EIO;
return 0;
}
#endif
int srb_cdmi_getsize(srb_debug_t *dbg, struct srb_cdmi_desc_s *desc,
uint64_t *size)
{
char *buff = desc->xmit_buff;