diff options
Diffstat (limited to 'libglusterfs/src/gfdb/gfdb_data_store_helper.c')
| -rw-r--r-- | libglusterfs/src/gfdb/gfdb_data_store_helper.c | 612 |
1 files changed, 0 insertions, 612 deletions
diff --git a/libglusterfs/src/gfdb/gfdb_data_store_helper.c b/libglusterfs/src/gfdb/gfdb_data_store_helper.c deleted file mode 100644 index fba5ec5a252..00000000000 --- a/libglusterfs/src/gfdb/gfdb_data_store_helper.c +++ /dev/null @@ -1,612 +0,0 @@ - -#include "gfdb_data_store_helper.h" -#include "syscall.h" - -/****************************************************************************** - * - * Query record related functions - * - * ****************************************************************************/ - -/*Create a single link info structure*/ -gfdb_link_info_t* -gfdb_link_info_new () -{ - gfdb_link_info_t *link_info = NULL; - - link_info = GF_CALLOC (1, sizeof(gfdb_link_info_t), - gf_mt_gfdb_link_info_t); - if (!link_info) { - gf_msg (GFDB_DATA_STORE, GF_LOG_ERROR, ENOMEM, - LG_MSG_NO_MEMORY, "Memory allocation failed for " - "link_info "); - goto out; - } - - INIT_LIST_HEAD (&link_info->list); - -out: - - return link_info; -} - -/*Destroy a link info structure*/ -void -gfdb_link_info_free(gfdb_link_info_t *link_info) -{ - GF_FREE (link_info); -} - - -/*Function to create the query_record*/ -gfdb_query_record_t * -gfdb_query_record_new() -{ - int ret = -1; - gfdb_query_record_t *query_record = NULL; - - query_record = GF_CALLOC (1, sizeof(gfdb_query_record_t), - gf_mt_gfdb_query_record_t); - if (!query_record) { - gf_msg (GFDB_DATA_STORE, GF_LOG_ERROR, ENOMEM, - LG_MSG_NO_MEMORY, "Memory allocation failed for " - "query_record "); - goto out; - } - - INIT_LIST_HEAD (&query_record->link_list); - - ret = 0; -out: - if (ret == -1) { - GF_FREE (query_record); - } - return query_record; -} - - -/*Function to delete a single linkinfo from list*/ -static void -gfdb_delete_linkinfo_from_list (gfdb_link_info_t **link_info) -{ - GF_VALIDATE_OR_GOTO (GFDB_DATA_STORE, link_info, out); - GF_VALIDATE_OR_GOTO (GFDB_DATA_STORE, *link_info, out); - - /*Remove hard link from list*/ - list_del(&(*link_info)->list); - gfdb_link_info_free (*link_info); - link_info = NULL; -out: - return; -} - - -/*Function to destroy link_info list*/ -void -gfdb_free_link_info_list (gfdb_query_record_t *query_record) -{ - gfdb_link_info_t *link_info = NULL; - gfdb_link_info_t *temp = NULL; - - GF_VALIDATE_OR_GOTO (GFDB_DATA_STORE, query_record, out); - - list_for_each_entry_safe(link_info, temp, - &query_record->link_list, list) - { - gfdb_delete_linkinfo_from_list (&link_info); - link_info = NULL; - } - -out: - return; -} - - - -/* Function to add linkinfo to the query record */ -int -gfdb_add_link_to_query_record (gfdb_query_record_t *query_record, - uuid_t pgfid, - char *base_name) -{ - int ret = -1; - gfdb_link_info_t *link_info = NULL; - int base_name_len = 0; - - GF_VALIDATE_OR_GOTO (GFDB_DATA_STORE, query_record, out); - GF_VALIDATE_OR_GOTO (GFDB_DATA_STORE, pgfid, out); - GF_VALIDATE_OR_GOTO (GFDB_DATA_STORE, base_name, out); - - link_info = gfdb_link_info_new (); - if (!link_info) { - goto out; - } - - gf_uuid_copy (link_info->pargfid, pgfid); - base_name_len = strlen (base_name); - memcpy (link_info->file_name, base_name, base_name_len); - link_info->file_name[base_name_len] = '\0'; - - list_add_tail (&link_info->list, - &query_record->link_list); - - query_record->link_count++; - - ret = 0; -out: - if (ret) { - gfdb_link_info_free (link_info); - link_info = NULL; - } - return ret; -} - - - -/*Function to destroy query record*/ -void -gfdb_query_record_free(gfdb_query_record_t *query_record) -{ - if (query_record) { - gfdb_free_link_info_list (query_record); - GF_FREE (query_record); - } -} - - -/****************************************************************************** - SERIALIZATION/DE-SERIALIZATION OF QUERY RECORD -*******************************************************************************/ -/****************************************************************************** - The on disk format of query record is as follows, - -+---------------------------------------------------------------------------+ -| Length of serialized query record | Serialized Query Record | -+---------------------------------------------------------------------------+ - 4 bytes Length of serialized query record - | - | - -------------------------------------------------| - | - | - V - Serialized Query Record Format: - +---------------------------------------------------------------------------+ - | GFID | Link count | <LINK INFO> |..... | FOOTER | - +---------------------------------------------------------------------------+ - 16 B 4 B Link Length 4 B - | | - | | - -----------------------------| | - | | - | | - V | - Each <Link Info> will be serialized as | - +-----------------------------------------------+ | - | PGID | BASE_NAME_LENGTH | BASE_NAME | | - +-----------------------------------------------+ | - 16 B 4 B BASE_NAME_LENGTH | - | - | - ------------------------------------------------------------------------| - | - | - V - FOOTER is a magic number 0xBAADF00D indicating the end of the record. - This also serves as a serialized schema validator. - * ****************************************************************************/ - -#define GFDB_QUERY_RECORD_FOOTER 0xBAADF00D -#define UUID_LEN 16 - -/*Function to get the potential length of the serialized buffer*/ -static int32_t -gfdb_query_record_serialized_length (gfdb_query_record_t *query_record) -{ - int32_t len = -1; - gfdb_link_info_t *link_info = NULL; - - GF_VALIDATE_OR_GOTO (GFDB_DATA_STORE, query_record, out); - - /* Length of GFID */ - len = UUID_LEN; - - /* length of number of links*/ - len += sizeof (int32_t); - - list_for_each_entry (link_info, &query_record->link_list, list) { - - /* length of PFID */ - len += UUID_LEN; - - /* Add size of base name length*/ - len += sizeof (int32_t); - - /* Length of base_name */ - len += strlen (link_info->file_name); - - } - - /* length of footer */ - len += sizeof (int32_t); -out: - return len; -} - -/* Function for serializing query record. - * - * Query Record Serialization Format - * +---------------------------------------------------------------------------+ - * | GFID | Link count | <LINK INFO> |..... | FOOTER | - * +---------------------------------------------------------------------------+ - * 16 B 4 B Link Length 4 B - * - * - * Each <Link Info> will be serialized as - * +-----------------------------------------------+ - * | PGID | BASE_NAME_LENGTH | BASE_NAME | - * +-----------------------------------------------+ - * 16 B 4 B BASE_NAME_LENGTH - * - * - * FOOTER is a magic number 0xBAADF00D indicating the end of the record. - * This also serves as a serialized schema validator. - * - * The function will allocate memory to the serialized buffer, - * the caller needs to free it. - * Returns the length of the serialized buffer on success - * or -1 on failure. - * - * */ -static int -gfdb_query_record_serialize (gfdb_query_record_t *query_record, - char **in_buffer) -{ - gfdb_link_info_t *link_info = NULL; - int count = -1; - int base_name_len = 0; - int buffer_length = 0; - int footer = GFDB_QUERY_RECORD_FOOTER; - char *buffer = NULL; - char *ret_buffer = NULL; - - GF_VALIDATE_OR_GOTO (GFDB_DATA_STORE, query_record, out); - GF_VALIDATE_OR_GOTO (GFDB_DATA_STORE, - (query_record->link_count > 0), out); - GF_VALIDATE_OR_GOTO (GFDB_DATA_STORE, in_buffer, out); - - - /* Calculate the total length of the serialized buffer */ - buffer_length = gfdb_query_record_serialized_length (query_record); - if (buffer_length <= 0) { - gf_msg (GFDB_DATA_STORE, GF_LOG_ERROR, 0, - LG_MSG_DB_ERROR, "Failed to calculate the length of " - "serialized buffer"); - goto out; - } - - /* Allocate memory to the serialized buffer */ - ret_buffer = GF_CALLOC (1, buffer_length, gf_common_mt_char); - if (!ret_buffer) { - gf_msg (GFDB_DATA_STORE, GF_LOG_ERROR, 0, - LG_MSG_DB_ERROR, "Memory allocation failed for " - "serialized buffer."); - goto out; - } - - buffer = ret_buffer; - - count = 0; - - /* Copying the GFID */ - memcpy (buffer, query_record->gfid, UUID_LEN); - buffer += UUID_LEN; - count += UUID_LEN; - - /* Copying the number of links */ - memcpy (buffer, &query_record->link_count, sizeof (int32_t)); - buffer += sizeof (int32_t); - count += sizeof (int32_t); - - list_for_each_entry (link_info, &query_record->link_list, list) { - - /* Copying the PFID */ - memcpy(buffer, link_info->pargfid, UUID_LEN); - buffer += UUID_LEN; - count += UUID_LEN; - - /* Copying base name length*/ - base_name_len = strlen (link_info->file_name); - memcpy (buffer, &base_name_len, sizeof (int32_t)); - buffer += sizeof (int32_t); - count += sizeof (int32_t); - - /* Length of base_name */ - memcpy(buffer, link_info->file_name, base_name_len); - buffer += base_name_len; - count += base_name_len; - - } - - /* Copying the Footer of the record */ - memcpy (buffer, &footer, sizeof (int32_t)); - buffer += sizeof (int32_t); - count += sizeof (int32_t); - -out: - if (count < 0) { - GF_FREE (ret_buffer); - ret_buffer = NULL; - } - *in_buffer = ret_buffer; - return count; -} - -static gf_boolean_t -is_serialized_buffer_valid (char *in_buffer, int buffer_length) { - gf_boolean_t ret = _gf_false; - int footer = 0; - - /* Read the footer */ - in_buffer += (buffer_length - sizeof (int32_t)); - memcpy (&footer, in_buffer, sizeof (int32_t)); - - /* - * if the footer is not GFDB_QUERY_RECORD_FOOTER - * then the serialized record is invalid - * - * */ - if (footer != GFDB_QUERY_RECORD_FOOTER) { - goto out; - } - - ret = _gf_true; -out: - return ret; -} - - -static int -gfdb_query_record_deserialize (char *in_buffer, - int buffer_length, - gfdb_query_record_t **query_record) -{ - int ret = -1; - char *buffer = NULL; - int i = 0; - gfdb_link_info_t *link_info = NULL; - int count = 0; - int base_name_len = 0; - gfdb_query_record_t *ret_qrecord = NULL; - - GF_VALIDATE_OR_GOTO (GFDB_DATA_STORE, in_buffer, out); - GF_VALIDATE_OR_GOTO (GFDB_DATA_STORE, query_record, out); - GF_VALIDATE_OR_GOTO (GFDB_DATA_STORE, (buffer_length > 0), out); - - if (!is_serialized_buffer_valid (in_buffer, buffer_length)) { - gf_msg (GFDB_DATA_STORE, GF_LOG_ERROR, 0, - LG_MSG_DB_ERROR, "Invalid serialized query record"); - goto out; - } - - buffer = in_buffer; - - ret_qrecord = gfdb_query_record_new (); - if (!ret_qrecord) { - gf_msg (GFDB_DATA_STORE, GF_LOG_ERROR, 0, - LG_MSG_DB_ERROR, "Failed to allocate space to " - "gfdb_query_record_t"); - goto out; - } - - /* READ GFID */ - memcpy ((ret_qrecord)->gfid, buffer, UUID_LEN); - buffer += UUID_LEN; - count += UUID_LEN; - - /* Read the number of link */ - memcpy (&(ret_qrecord->link_count), buffer, sizeof (int32_t)); - buffer += sizeof (int32_t); - count += sizeof (int32_t); - - /* Read all the links */ - for (i = 0; i < ret_qrecord->link_count; i++) { - if (count >= buffer_length) { - gf_msg (GFDB_DATA_STORE, GF_LOG_ERROR, 0, - LG_MSG_DB_ERROR, "Invalid serialized " - "query record"); - ret = -1; - goto out; - } - - link_info = gfdb_link_info_new (); - if (!link_info) { - gf_msg (GFDB_DATA_STORE, GF_LOG_ERROR, 0, - LG_MSG_DB_ERROR, "Failed to create link_info"); - goto out; - } - - /* READ PGFID */ - memcpy (link_info->pargfid, buffer, UUID_LEN); - buffer += UUID_LEN; - count += UUID_LEN; - - /* Read base name length */ - memcpy (&base_name_len, buffer, sizeof (int32_t)); - buffer += sizeof (int32_t); - count += sizeof (int32_t); - - /* READ basename */ - memcpy (link_info->file_name, buffer, base_name_len); - buffer += base_name_len; - count += base_name_len; - link_info->file_name[base_name_len] = '\0'; - - /* Add link_info to the list */ - list_add_tail (&link_info->list, - &(ret_qrecord->link_list)); - - /* Reseting link_info */ - link_info = NULL; - } - - ret = 0; -out: - if (ret) { - gfdb_query_record_free (ret_qrecord); - ret_qrecord = NULL; - } - *query_record = ret_qrecord; - return ret; -} - - - - - -/* Function to write query record to file - * - * Disk format - * +---------------------------------------------------------------------------+ - * | Length of serialized query record | Serialized Query Record | - * +---------------------------------------------------------------------------+ - * 4 bytes Length of serialized query record - * - * Please refer gfdb_query_record_serialize () for format of - * Serialized Query Record - * - * */ -int -gfdb_write_query_record (int fd, - gfdb_query_record_t *query_record) -{ - int ret = -1; - int buffer_len = 0; - char *buffer = NULL; - int write_len = 0; - char *write_buffer = NULL; - - GF_VALIDATE_OR_GOTO (GFDB_DATA_STORE, (fd >= 0), out); - GF_VALIDATE_OR_GOTO (GFDB_DATA_STORE, query_record, out); - - buffer_len = gfdb_query_record_serialize (query_record, &buffer); - if (buffer_len < 0) { - gf_msg (GFDB_DATA_STORE, GF_LOG_ERROR, 0, - LG_MSG_DB_ERROR, "Failed to serialize query record"); - goto out; - } - - /* Serialize the buffer length and write to file */ - ret = write (fd, &buffer_len, sizeof (int32_t)); - if (ret < 0) { - gf_msg (GFDB_DATA_STORE, GF_LOG_ERROR, 0, - LG_MSG_DB_ERROR, "Failed to write buffer length" - " to file"); - goto out; - } - - /* Write the serialized query record to file */ - write_len = buffer_len; - write_buffer = buffer; - while ((ret = write (fd, write_buffer, write_len)) < write_len) { - if (ret < 0) { - gf_msg (GFDB_DATA_STORE, GF_LOG_ERROR, errno, - LG_MSG_DB_ERROR, "Failed to write serialized " - "query record to file"); - goto out; - } - - write_buffer += ret; - write_len -= ret; - } - - ret = 0; -out: - GF_FREE (buffer); - return ret; -} - - - -/* Function to read query record from file. - * Allocates memory to query record and - * returns length of serialized query record when successful - * Return -1 when failed. - * Return 0 when reached EOF. - * */ -int -gfdb_read_query_record (int fd, - gfdb_query_record_t **query_record) -{ - int ret = -1; - int buffer_len = 0; - int read_len = 0; - char *buffer = NULL; - char *read_buffer = NULL; - - GF_VALIDATE_OR_GOTO (GFDB_DATA_STORE, (fd >= 0), out); - GF_VALIDATE_OR_GOTO (GFDB_DATA_STORE, query_record, out); - - - /* Read serialized query record length from the file*/ - ret = sys_read (fd, &buffer_len, sizeof (int32_t)); - if (ret < 0) { - gf_msg (GFDB_DATA_STORE, GF_LOG_ERROR, 0, - LG_MSG_DB_ERROR, "Failed reading buffer length" - " from file"); - goto out; - } - /* EOF */ - else if (ret == 0) { - ret = 0; - goto out; - } - - /* Allocating memory to the serialization buffer */ - buffer = GF_CALLOC (1, buffer_len, gf_common_mt_char); - if (!buffer) { - gf_msg (GFDB_DATA_STORE, GF_LOG_ERROR, 0, - LG_MSG_DB_ERROR, "Failed to allocate space to " - "serialized buffer"); - goto out; - } - - - /* Read the serialized query record from file */ - read_len = buffer_len; - read_buffer = buffer; - while ((ret = sys_read (fd, read_buffer, read_len)) < read_len) { - - /*Any error */ - if (ret < 0) { - gf_msg (GFDB_DATA_STORE, GF_LOG_ERROR, errno, - LG_MSG_DB_ERROR, "Failed to read serialized " - "query record from file"); - goto out; - } - /* EOF */ - else if (ret == 0) { - gf_msg (GFDB_DATA_STORE, GF_LOG_ERROR, 0, - LG_MSG_DB_ERROR, "Invalid query record or " - "corrupted query file"); - ret = -1; - goto out; - } - - read_buffer += ret; - read_len -= ret; - } - - ret = gfdb_query_record_deserialize (buffer, buffer_len, - query_record); - if (ret) { - gf_msg (GFDB_DATA_STORE, GF_LOG_ERROR, 0, - LG_MSG_DB_ERROR, "Failed to de-serialize query record"); - goto out; - } - - ret = buffer_len; -out: - GF_FREE (buffer); - return ret; -} |