#include "msg_private.h"
#include "xbt/log.h"
+#include "msg_mailbox.h"
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_io, msg,
"Logging specific to MSG (io)");
}
/** \ingroup msg_file_management
- * \brief Read a file
+ * \brief Read a file (local or remote)
*
* \param size of the file to read
* \param fd is a the file descriptor
- * \return the number of bytes successfully read
+ * \return the number of bytes successfully read or -1 if an error occurred
*/
sg_size_t MSG_file_read(msg_file_t fd, sg_size_t size)
{
- msg_file_priv_t priv = MSG_file_priv(fd);
- return simcall_file_read(priv->simdata->smx_file, size);
+ msg_file_priv_t file_priv = MSG_file_priv(fd);
+ sg_size_t read_size;
+
+ /* Find the host where the file is physically located and read it */
+ msg_storage_t storage_src =(msg_storage_t) xbt_lib_get_elm_or_null(storage_lib, file_priv->storageId);
+ msg_storage_priv_t storage_priv_src = MSG_storage_priv(storage_src);
+ msg_host_t attached_host = MSG_get_host_by_name(storage_priv_src->hostname);
+ read_size = simcall_file_read(file_priv->simdata->smx_file, size, attached_host);
+
+ if(strcmp(storage_priv_src->hostname, MSG_host_get_name(MSG_host_self()))){
+ /* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
+ XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", storage_priv_src->hostname, read_size);
+ msg_host_t *m_host_list = NULL;
+ m_host_list = calloc(2, sizeof(msg_host_t));
+
+ m_host_list[0] = MSG_host_self();
+ m_host_list[1] = attached_host;
+ double computation_amount[] = { 0, 0 };
+ double communication_amount[] = { 0, 0, (double)read_size, 0 };
+
+ msg_task_t task = MSG_parallel_task_create("file transfer for read", 2, m_host_list, computation_amount, communication_amount, NULL);
+ msg_error_t transfer = MSG_parallel_task_execute(task);
+ MSG_task_destroy(task);
+ free(m_host_list);
+ if(transfer != MSG_OK){
+ if (transfer == MSG_HOST_FAILURE)
+ XBT_WARN("Transfer error, %s remote host just turned off!", MSG_host_get_name(attached_host));
+ if (transfer == MSG_TASK_CANCELED)
+ XBT_WARN("Transfer error, task has been canceled!");
+
+ return -1;
+ }
+ }
+ return read_size;
}
/** \ingroup msg_file_management
- * \brief Write into a file
+ * \brief Write into a file (local or remote)
*
* \param size of the file to write
* \param fd is a the file descriptor
- * \return the number of bytes successfully write
+ * \return the number of bytes successfully write or -1 if an error occurred
*/
sg_size_t MSG_file_write(msg_file_t fd, sg_size_t size)
{
- msg_file_priv_t priv = MSG_file_priv(fd);
- return simcall_file_write(priv->simdata->smx_file, size);
+ msg_file_priv_t file_priv = MSG_file_priv(fd);
+ sg_size_t write_size, offset;
+
+ /* Find the host where the file is physically located (remote or local)*/
+ msg_storage_t storage_src =(msg_storage_t) xbt_lib_get_elm_or_null(storage_lib, file_priv->storageId);
+ msg_storage_priv_t storage_priv_src = MSG_storage_priv(storage_src);
+ msg_host_t attached_host = MSG_get_host_by_name(storage_priv_src->hostname);
+
+ if(strcmp(storage_priv_src->hostname, MSG_host_get_name(MSG_host_self()))){
+ /* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
+ XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", storage_priv_src->hostname, size);
+ msg_host_t *m_host_list = NULL;
+ m_host_list = calloc(2, sizeof(msg_host_t));
+
+ m_host_list[0] = MSG_host_self();
+ m_host_list[1] = attached_host;
+ double computation_amount[] = { 0, 0 };
+ double communication_amount[] = { 0, (double)size, 0, 0 };
+
+ msg_task_t task = MSG_parallel_task_create("file transfer for write", 2, m_host_list, computation_amount, communication_amount, NULL);
+ msg_error_t transfer = MSG_parallel_task_execute(task);
+ MSG_task_destroy(task);
+ free(m_host_list);
+ if(transfer != MSG_OK){
+ if (transfer == MSG_HOST_FAILURE)
+ XBT_WARN("Transfer error, %s remote host just turned off!", MSG_host_get_name(attached_host));
+ if (transfer == MSG_TASK_CANCELED)
+ XBT_WARN("Transfer error, task has been canceled!");
+
+ return -1;
+ }
+ }
+ /* Write file on local or remote host */
+ offset = simcall_file_tell(file_priv->simdata->smx_file);
+ write_size = simcall_file_write(file_priv->simdata->smx_file, size, attached_host);
+ file_priv->size = offset+write_size;
+
+ return write_size;
}
/** \ingroup msg_file_management
*/
msg_file_t MSG_file_open(const char* fullpath, void* data)
{
+ char name[2048];
msg_file_priv_t priv = xbt_new(s_msg_file_priv_t, 1);
priv->data = data;
priv->fullpath = xbt_strdup(fullpath);
priv->simdata = xbt_new0(s_simdata_file_t,1);
- priv->simdata->smx_file = simcall_file_open(fullpath);
- xbt_lib_set(file_lib, fullpath, MSG_FILE_LEVEL, priv);
- return (msg_file_t) xbt_lib_get_elm_or_null(file_lib, fullpath);
+ priv->simdata->smx_file = simcall_file_open(fullpath, MSG_host_self());
+ sprintf(name, "%s:%s",MSG_host_get_name(MSG_host_self()),fullpath);
+ xbt_lib_set(file_lib, name, MSG_FILE_LEVEL, priv);
+ msg_file_t fd = (msg_file_t) xbt_lib_get_elm_or_null(file_lib, name);
+ __MSG_file_get_info(fd);
+
+ return fd;
}
/**
*/
int MSG_file_close(msg_file_t fd)
{
+ char name[2048];
msg_file_priv_t priv = MSG_file_priv(fd);
- int res = simcall_file_close(priv->simdata->smx_file);
- xbt_lib_unset(file_lib, priv->fullpath, MSG_FILE_LEVEL, 1);
+ int res = simcall_file_close(priv->simdata->smx_file, MSG_host_self());
+ sprintf(name, "%s:%s",MSG_host_get_name(MSG_host_self()),priv->fullpath);
+ xbt_lib_unset(file_lib, name, MSG_FILE_LEVEL, 1);
return res;
}
* \param fd is the file descriptor (#msg_file_t)
* \return 0 on success or 1 on error
*/
-int MSG_file_unlink(msg_file_t fd)
+msg_error_t MSG_file_unlink(msg_file_t fd)
{
msg_file_priv_t priv = MSG_file_priv(fd);
int res = simcall_file_unlink(priv->simdata->smx_file);
return simcall_file_get_size(priv->simdata->smx_file);
}
-/** \ingroup msg_file_management
- * \brief Search for file
- *
- * \param mount is the mount point where find the file is located
- * \param path the file regex to find
- * \return a xbt_dict_t of file where key is the name of file and the
- * value the msg_stat_t corresponding to the key
- */
-xbt_dict_t MSG_file_ls(const char *mount, const char *path)
-{
- xbt_assert(path,"You must set path");
- int size = strlen(path);
- if(size && path[size-1] != '/')
- {
- char *new_path = bprintf("%s/",path);
- XBT_DEBUG("Change '%s' for '%s'",path,new_path);
- xbt_dict_t dict = simcall_file_ls(mount, new_path);
- xbt_free(new_path);
- return dict;
- }
-
- return simcall_file_ls(mount, path);
-}
-
/**
* \ingroup msg_file_management
* \brief Set the file position indicator in the msg_file_t by adding offset bytes
* MSG_TASK_CANCELED (=8).
*
*/
-msg_error_t MSG_file_seek(msg_file_t fd, sg_size_t offset, int origin)
+msg_error_t MSG_file_seek(msg_file_t fd, sg_offset_t offset, int origin)
{
msg_file_priv_t priv = MSG_file_priv(fd);
return simcall_file_seek(priv->simdata->smx_file, offset, origin);
msg_error_t MSG_file_rcopy (msg_file_t file, msg_host_t host, const char* fullpath)
{
msg_file_priv_t file_priv = MSG_file_priv(file);
- return simcall_file_rcopy(file_priv->simdata->smx_file, host, fullpath);
+ sg_size_t read_size;
+
+ /* Find the host where the file is physically located and read it */
+ msg_storage_t storage_src =(msg_storage_t) xbt_lib_get_elm_or_null(storage_lib, file_priv->storageId);
+ msg_storage_priv_t storage_priv_src = MSG_storage_priv(storage_src);
+ msg_host_t attached_host = MSG_get_host_by_name(storage_priv_src->hostname);
+ MSG_file_seek(file, 0, SEEK_SET);
+ read_size = simcall_file_read(file_priv->simdata->smx_file, file_priv->size, attached_host);
+
+ /* Find the real host destination where the file will be physically stored */
+ xbt_dict_cursor_t cursor = NULL;
+ char *mount_name, *storage_name, *file_mount_name, *host_name_dest;
+ msg_storage_t storage_dest = NULL;
+ msg_host_t host_dest;
+ size_t longest_prefix_length = 0;
+
+ xbt_dict_t storage_list = simcall_host_get_mounted_storage_list(host);
+ xbt_dict_foreach(storage_list,cursor,mount_name,storage_name){
+ file_mount_name = (char *) xbt_malloc ((strlen(mount_name)+1));
+ strncpy(file_mount_name,fullpath,strlen(mount_name)+1);
+ file_mount_name[strlen(mount_name)] = '\0';
+
+ if(!strcmp(file_mount_name,mount_name) && strlen(mount_name)>longest_prefix_length){
+ /* The current mount name is found in the full path and is bigger than the previous*/
+ longest_prefix_length = strlen(mount_name);
+ storage_dest = (msg_storage_t) xbt_lib_get_elm_or_null(storage_lib, storage_name);
+ }
+ free(file_mount_name);
+ }
+ if(longest_prefix_length>0){
+ /* Mount point found, retrieve the host the storage is attached to */
+ msg_storage_priv_t storage_dest_priv = MSG_storage_priv(storage_dest);
+ host_name_dest = (char*)storage_dest_priv->hostname;
+ host_dest = MSG_get_host_by_name(host_name_dest);
+
+ }else{
+ XBT_WARN("Can't find mount point for '%s' on destination host '%s'", fullpath, SIMIX_host_get_name(host));
+ return MSG_TASK_CANCELED;
+ }
+
+ XBT_DEBUG("Initiate data transfer of %llu bytes between %s and %s.", read_size, storage_priv_src->hostname, host_name_dest);
+ msg_host_t *m_host_list = NULL;
+ m_host_list = calloc(2, sizeof(msg_host_t));
+
+ m_host_list[0] = attached_host;
+ m_host_list[1] = host_dest;
+ double computation_amount[] = { 0, 0 };
+ double communication_amount[] = { 0, (double)read_size, 0, 0 };
+
+ msg_task_t task = MSG_parallel_task_create("file transfer for write", 2, m_host_list, computation_amount, communication_amount, NULL);
+ msg_error_t transfer = MSG_parallel_task_execute(task);
+ MSG_task_destroy(task);
+ free(m_host_list);
+ if(transfer != MSG_OK){
+ if (transfer == MSG_HOST_FAILURE)
+ XBT_WARN("Transfer error, %s remote host just turned off!", host_name_dest);
+ if (transfer == MSG_TASK_CANCELED)
+ XBT_WARN("Transfer error, task has been canceled!");
+
+ return -1;
+ }
+
+ /* Create file on remote host, write it and close it */
+ smx_file_t smx_file = simcall_file_open(fullpath, host_dest);
+ simcall_file_write(smx_file, read_size, host_dest);
+ simcall_file_close(smx_file, host_dest);
+ return MSG_OK;
+
}
/**
*/
msg_error_t MSG_file_rmove (msg_file_t file, msg_host_t host, const char* fullpath)
{
- msg_file_priv_t file_priv = MSG_file_priv(file);
- msg_error_t res = simcall_file_rcopy(file_priv->simdata->smx_file, host, fullpath);
- simcall_file_unlink(file_priv->simdata->smx_file);
+ msg_error_t res = MSG_file_rcopy(file, host, fullpath);
+ MSG_file_unlink(file);
return res;
}
const char *name = SIMIX_storage_get_name(storage);
const char *host = SIMIX_storage_get_host(storage);
msg_storage_priv_t storage_private = xbt_new0(s_msg_storage_priv_t, 1);
- storage_private->host = host;
+ storage_private->hostname = host;
xbt_lib_set(storage_lib,name,MSG_STORAGE_LEVEL,storage_private);
return xbt_lib_get_elm_or_null(storage_lib, name);
}
/** \ingroup msg_storage_management
* \brief Returns the free space size of a storage element
- * \param name the name of a storage
+ * \param storage a storage
* \return the free space size of the storage element (as a #sg_size_t)
*/
-sg_size_t MSG_storage_get_free_size(const char* name){
- return simcall_storage_get_free_size(name);
+sg_size_t MSG_storage_get_free_size(msg_storage_t storage){
+ return simcall_storage_get_free_size(storage);
}
/** \ingroup msg_storage_management
* \brief Returns the used space size of a storage element
- * \param name the name of a storage
+ * \param storage a storage
* \return the used space size of the storage element (as a #sg_size_t)
*/
-sg_size_t MSG_storage_get_used_size(const char* name){
- return simcall_storage_get_used_size(name);
+sg_size_t MSG_storage_get_used_size(msg_storage_t storage){
+ return simcall_storage_get_used_size(storage);
}
/** \ingroup msg_storage_management
return SIMIX_storage_get_content(storage);
}
+/** \ingroup msg_storage_management
+ *
+ * \brief Returns the size of a #msg_storage_t.
+ * \param storage a storage
+ * \return The size of the storage
+ */
sg_size_t MSG_storage_get_size(msg_storage_t storage)
{
return SIMIX_storage_get_size(storage);
const char *MSG_storage_get_host(msg_storage_t storage) {
xbt_assert((storage != NULL), "Invalid parameters");
msg_storage_priv_t priv = MSG_storage_priv(storage);
- return priv->host;
+ return priv->hostname;
}
