/*
* ndmpd_worker thread
*
* Parameters:
* argp (input) - structure containing socket and handler function
*
* Returns:
* 0 - successful connection.
* -1 - error.
*/
void *
ndmpd_worker(void *ptarg)
{
int sock;
ndmp_connection_t *connection;
ndmpd_worker_arg_t *argp = (ndmpd_worker_arg_t *)ptarg;
if (!argp)
return ((void *)-1);
NS_INC(trun);
sock = argp->nw_sock;
if ((connection = ndmp_create_connection()) == NULL) {
(void) close(sock);
free(argp);
exit(1);
}
/* initialize auditing session */
if (adt_start_session(&connection->conn_ah, NULL, 0) != 0) {
free(argp);
return ((void *)-1);
}
((ndmp_connection_t *)connection)->conn_sock = sock;
(*argp->nw_con_handler_func)(connection);
(void) adt_end_session(connection->conn_ah);
ndmp_destroy_connection(connection);
NS_DEC(trun);
free(argp);
return (NULL);
}
/*
* tlm_output_file
*
* Put this file into the output buffers.
*/
longlong_t
tlm_output_file(char *dir, char *name, char *chkdir,
tlm_acls_t *tlm_acls, tlm_commands_t *commands, tlm_cmd_t *local_commands,
tlm_job_stats_t *job_stats, struct hardlink_q *hardlink_q)
{
char *fullname; /* directory + name */
char *snapname; /* snapshot name */
char *linkname; /* where this file points */
int section = 0; /* section of a huge file */
int fd;
longlong_t real_size; /* the origional file size */
longlong_t file_size; /* real size of this file */
longlong_t seek_spot = 0; /* location in the file */
/* for Multi Volume record */
u_longlong_t pos;
char *fnamep;
/* Indicate whether a file with the same inode has been backed up. */
int hardlink_done = 0;
/*
* If a file with the same inode has been backed up, hardlink_pos holds
* the tape offset of the data record.
*/
u_longlong_t hardlink_pos = 0;
if (tlm_is_too_long(tlm_acls->acl_checkpointed, dir, name)) {
syslog(LOG_ERR, "Path too long [%s][%s]", dir, name);
return (-TLM_NO_SCRATCH_SPACE);
}
fullname = ndmp_malloc(TLM_MAX_PATH_NAME);
linkname = ndmp_malloc(TLM_MAX_PATH_NAME);
snapname = ndmp_malloc(TLM_MAX_PATH_NAME);
if (fullname == NULL || linkname == NULL || snapname == NULL) {
real_size = -TLM_NO_SCRATCH_SPACE;
goto err_out;
}
if (!tlm_cat_path(fullname, dir, name) ||
!tlm_cat_path(snapname, chkdir, name)) {
syslog(LOG_ERR, "Path too long.");
real_size = -TLM_NO_SCRATCH_SPACE;
goto err_out;
}
pos = tlm_get_data_offset(local_commands);
if (S_ISPECIAL(tlm_acls->acl_attr.st_mode)) {
if (S_ISLNK(tlm_acls->acl_attr.st_mode)) {
file_size = tlm_readlink(fullname, snapname, linkname,
TLM_MAX_PATH_NAME-1);
if (file_size < 0) {
real_size = -ENOENT;
goto err_out;
}
}
/*
* Since soft links can not be read(2), we should only
* backup the file header.
*/
(void) output_file_header(fullname,
linkname,
tlm_acls,
section,
local_commands);
(void) tlm_log_fhnode(job_stats, dir, name,
&tlm_acls->acl_attr, pos);
(void) tlm_log_fhpath_name(job_stats, fullname,
&tlm_acls->acl_attr, pos);
free(fullname);
free(linkname);
free(snapname);
return (0);
}
fnamep = (tlm_acls->acl_checkpointed) ? snapname : fullname;
/*
* For hardlink, only read the data if no other link
* belonging to the same inode has been backed up.
*/
if (tlm_acls->acl_attr.st_nlink > 1) {
hardlink_done = !hardlink_q_get(hardlink_q,
tlm_acls->acl_attr.st_ino, &hardlink_pos, NULL);
}
if (!hardlink_done) {
/*
* Open the file for reading.
*/
fd = open(fnamep, O_RDONLY);
if (fd == -1) {
syslog(LOG_ERR,
"BACKUP> Can't open file [%s][%s] err(%d)",
fullname, fnamep, errno);
real_size = -TLM_NO_SOURCE_FILE;
goto err_out;
}
} else {
syslog(LOG_DEBUG, "found hardlink, inode = %llu, pos = %llu ",
tlm_acls->acl_attr.st_ino, hardlink_pos);
fd = -1;
}
linkname[0] = 0;
real_size = tlm_acls->acl_attr.st_size;
(void) output_acl_header(&tlm_acls->acl_info,
local_commands);
/*
* section = 0: file is small enough for TAR
* section > 0: file goes out in TLM_MAX_TAR_IMAGE sized chunks
* and the file name gets munged
*/
file_size = real_size;
if (file_size > TLM_MAX_TAR_IMAGE) {
if (output_humongus_header(fullname, file_size,
local_commands) < 0) {
(void) close(fd);
real_size = -TLM_NO_SCRATCH_SPACE;
goto err_out;
}
section = 1;
} else {
section = 0;
}
/*
* For hardlink, if other link belonging to the same inode
* has been backed up, only backup an empty record.
*/
if (hardlink_done)
file_size = 0;
/*
* work
*/
if (file_size == 0) {
(void) output_file_header(fullname,
linkname,
tlm_acls,
section,
local_commands);
/*
* this can fall right through since zero size files
* will be skipped by the WHILE loop anyway
*/
}
while (file_size > 0) {
int section_size = llmin(file_size,
(longlong_t)TLM_MAX_TAR_IMAGE);
tlm_acls->acl_attr.st_size = (longlong_t)section_size;
(void) output_file_header(fullname,
linkname,
tlm_acls,
section,
local_commands);
while (section_size > 0) {
char *buf;
long actual_size;
int read_size;
/*
* check for Abort commands
*/
if (commands->tcs_reader != TLM_BACKUP_RUN) {
local_commands->tc_writer = TLM_ABORT;
goto tear_down;
}
local_commands->tc_buffers->tbs_buffer[
local_commands->tc_buffers->tbs_buffer_in].
tb_file_size = section_size;
local_commands->tc_buffers->tbs_buffer[
local_commands->tc_buffers->tbs_buffer_in].
tb_seek_spot = seek_spot;
buf = get_write_buffer(section_size,
&actual_size, FALSE, local_commands);
if (!buf)
goto tear_down;
/*
* check for Abort commands
*/
if (commands->tcs_reader != TLM_BACKUP_RUN) {
local_commands->tc_writer = TLM_ABORT;
goto tear_down;
}
read_size = min(section_size, actual_size);
actual_size = read(fd, buf, read_size);
NS_ADD(rdisk, actual_size);
NS_INC(rfile);
if (actual_size == 0)
break;
if (actual_size == -1) {
syslog(LOG_ERR,
"problem(%d) reading file [%s][%s]",
errno, fullname, snapname);
goto tear_down;
}
seek_spot += actual_size;
file_size -= actual_size;
section_size -= actual_size;
}
section++;
}
/*
* If data belonging to this hardlink has been backed up, add the link
* to hardlink queue.
*/
if (tlm_acls->acl_attr.st_nlink > 1 && !hardlink_done) {
(void) hardlink_q_add(hardlink_q, tlm_acls->acl_attr.st_ino,
pos, NULL, 0);
syslog(LOG_DEBUG,
"backed up hardlink file %s, inode = %llu, pos = %llu ",
fullname, tlm_acls->acl_attr.st_ino, pos);
}
/*
* For hardlink, if other link belonging to the same inode has been
* backed up, no add_node entry should be sent for this link.
*/
if (hardlink_done) {
syslog(LOG_DEBUG,
"backed up hardlink link %s, inode = %llu, pos = %llu ",
fullname, tlm_acls->acl_attr.st_ino, hardlink_pos);
} else {
(void) tlm_log_fhnode(job_stats, dir, name,
&tlm_acls->acl_attr, pos);
}
(void) tlm_log_fhpath_name(job_stats, fullname, &tlm_acls->acl_attr,
pos);
tear_down:
local_commands->tc_buffers->tbs_buffer[
local_commands->tc_buffers->tbs_buffer_in].tb_seek_spot = 0;
(void) close(fd);
err_out:
free(fullname);
free(linkname);
free(snapname);
return (real_size);
}
/*ARGSUSED*/
longlong_t
tlm_output_xattr(char *dir, char *name, char *chkdir,
tlm_acls_t *tlm_acls, tlm_commands_t *commands,
tlm_cmd_t *local_commands, tlm_job_stats_t *job_stats)
{
char *fullname; /* directory + name */
char *snapname; /* snapshot name */
int section; /* section of a huge file */
int fd;
int afd = 0;
longlong_t seek_spot = 0; /* location in the file */
/* for Multi Volume record */
DIR *dp;
struct dirent *dtp;
char *attrname;
char *fnamep;
int rv = 0;
if (S_ISPECIAL(tlm_acls->acl_attr.st_mode)) {
return (TLM_NO_SOURCE_FILE);
}
fullname = ndmp_malloc(TLM_MAX_PATH_NAME);
if (fullname == NULL) {
free(fullname);
return (-TLM_NO_SCRATCH_SPACE);
}
if (!tlm_cat_path(fullname, dir, name)) {
syslog(LOG_ERR, "Path too long.");
free(fullname);
return (-TLM_NO_SCRATCH_SPACE);
}
if (pathconf(fullname, _PC_XATTR_EXISTS) != 1 &&
sysattr_support(fullname, _PC_SATTR_EXISTS) != 1) {
free(fullname);
return (0);
}
attrname = ndmp_malloc(TLM_MAX_PATH_NAME);
snapname = ndmp_malloc(TLM_MAX_PATH_NAME);
if (attrname == NULL || snapname == NULL) {
rv = -TLM_NO_SCRATCH_SPACE;
goto err_out;
}
if (!tlm_cat_path(snapname, chkdir, name)) {
syslog(LOG_ERR, "Path too long.");
rv = -TLM_NO_SCRATCH_SPACE;
goto err_out;
}
fnamep = (tlm_acls->acl_checkpointed) ? snapname : fullname;
/*
* Open the file for reading.
*/
fd = attropen(fnamep, ".", O_RDONLY);
if (fd == -1) {
syslog(LOG_ERR, "BACKUP> Can't open file [%s][%s]",
fullname, fnamep);
rv = TLM_NO_SOURCE_FILE;
goto err_out;
}
section = 0;
dp = (DIR *)fdopendir(fd);
if (dp == NULL) {
syslog(LOG_ERR, "BACKUP> Can't open file [%s]", fullname);
(void) close(fd);
rv = TLM_NO_SOURCE_FILE;
goto err_out;
}
while ((dtp = readdir(dp)) != NULL) {
int section_size;
if (*dtp->d_name == '.')
continue;
if (sysattr_rdonly(dtp->d_name))
continue;
afd = attropen(fnamep, dtp->d_name, O_RDONLY);
if (afd == -1) {
syslog(LOG_ERR,
"problem(%d) opening xattr file [%s][%s]", errno,
fullname, fnamep);
goto tear_down;
}
(void) output_xattr_header(fullname, dtp->d_name, afd,
tlm_acls, section, local_commands);
(void) snprintf(attrname, TLM_MAX_PATH_NAME, "/dev/null/%s",
dtp->d_name);
(void) output_file_header(attrname, "", tlm_acls, 0,
local_commands);
section_size = (long)llmin(tlm_acls->acl_attr.st_size,
(longlong_t)TLM_MAX_TAR_IMAGE);
/* We only can read upto one section extended attribute */
while (section_size > 0) {
char *buf;
long actual_size;
int read_size;
int sysattr_read = 0;
char *rec;
int size;
/*
* check for Abort commands
*/
if (commands->tcs_reader != TLM_BACKUP_RUN) {
local_commands->tc_writer = TLM_ABORT;
goto tear_down;
}
local_commands->tc_buffers->tbs_buffer[
local_commands->tc_buffers->tbs_buffer_in].
tb_file_size = section_size;
local_commands->tc_buffers->tbs_buffer[
local_commands->tc_buffers->tbs_buffer_in].
tb_seek_spot = seek_spot;
buf = get_write_buffer(section_size,
&actual_size, FALSE, local_commands);
if (!buf)
goto tear_down;
if ((actual_size < section_size) &&
sysattr_rw(dtp->d_name)) {
rec = buf;
buf = ndmp_malloc(section_size);
if (!buf)
goto tear_down;
size = actual_size;
actual_size = section_size;
sysattr_read = 1;
}
/*
* check for Abort commands
*/
if (commands->tcs_reader != TLM_BACKUP_RUN) {
local_commands->tc_writer = TLM_ABORT;
goto tear_down;
}
read_size = min(section_size, actual_size);
if ((actual_size = read(afd, buf, read_size)) < 0)
break;
if (sysattr_read) {
if (get_write_one_buf(buf, rec, read_size,
size, local_commands) == 0) {
free(buf);
goto tear_down;
}
free(buf);
}
NS_ADD(rdisk, actual_size);
NS_INC(rfile);
if (actual_size == -1) {
syslog(LOG_ERR,
"problem(%d) reading file [%s][%s]",
errno, fullname, snapname);
goto tear_down;
}
seek_spot += actual_size;
section_size -= actual_size;
}
(void) close(afd);
afd = -1;
}
tear_down:
local_commands->tc_buffers->tbs_buffer[
local_commands->tc_buffers->tbs_buffer_in].tb_seek_spot = 0;
if (afd > 0)
(void) close(afd);
/* closedir closes fd too */
(void) closedir(dp);
err_out:
free(fullname);
free(attrname);
free(snapname);
return (rv);
}