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#include <errno.h>
#include <dirent.h>
#include <stddef.h>
#include <sys/types.h>
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <string.h>
#include "globals.h"
#include "glusterfs.h"
#include "logging.h"
#include "gf-changelog-helpers.h"
/* from the changelog translator */
#include "changelog-misc.h"
#include "changelog-mem-types.h"
/*@API
* gf_history_changelog_done:
* Move processed history changelog file from .processing
* to .processed
*
* ARGUMENTS:
* file(IN): path to processed history changelog file in
* .processing directory.
*
* RETURN VALUE:
* 0: On success.
* -1: On error.
*/
int
gf_history_changelog_done (char *file)
{
int ret = -1;
char *buffer = NULL;
xlator_t *this = NULL;
gf_changelog_t *gfc = NULL;
gf_changelog_t *hist_gfc = NULL;
char to_path[PATH_MAX] = {0,};
errno = EINVAL;
this = THIS;
if (!this)
goto out;
gfc = (gf_changelog_t *) this->private;
if (!gfc)
goto out;
hist_gfc = gfc->hist_gfc;
if (!hist_gfc)
goto out;
if (!file || !strlen (file))
goto out;
/* make sure 'file' is inside ->gfc_working_dir */
buffer = realpath (file, NULL);
if (!buffer)
goto out;
if (strncmp (hist_gfc->gfc_working_dir,
buffer, strlen (hist_gfc->gfc_working_dir)))
goto out;
(void) snprintf (to_path, PATH_MAX, "%s%s",
hist_gfc->gfc_processed_dir, basename (buffer));
gf_log (this->name, GF_LOG_DEBUG,
"moving %s to processed directory", file);
ret = rename (buffer, to_path);
if (ret) {
gf_log (this->name, GF_LOG_ERROR,
"cannot move %s to %s (reason: %s)",
file, to_path, strerror (errno));
goto out;
}
ret = 0;
out:
if (buffer)
free (buffer); /* allocated by realpath() */
return ret;
}
/**
* @API
* gf_history_changelog_start_fresh:
* For a set of changelogs, start from the begining.
* It will truncates the history tracker fd.
*
* RETURN VALUES:
* 0: On success.
* -1: On error.
*/
int
gf_history_changelog_start_fresh ()
{
xlator_t *this = NULL;
gf_changelog_t *gfc = NULL;
gf_changelog_t *hist_gfc = NULL;
this = THIS;
if (!this)
goto out;
errno = EINVAL;
gfc = (gf_changelog_t *) this->private;
if (!gfc)
goto out;
hist_gfc = gfc->hist_gfc;
if (!hist_gfc)
goto out;
if (gf_ftruncate (hist_gfc->gfc_fd, 0))
goto out;
return 0;
out:
return -1;
}
/*
* @API
* gf_history_changelog_next_change:
* Return the next history changelog file entry. Zero means all
* history chanelogs are consumed.
*
* ARGUMENTS:
* bufptr(OUT): Path to unprocessed history changelog file
* from tracker file.
* maxlen(IN): Usually PATH_MAX.
*
* RETURN VALUES:
* size: On success.
* -1 : On error.
*/
ssize_t
gf_history_changelog_next_change (char *bufptr, size_t maxlen)
{
ssize_t size = 0;
int tracker_fd = 0;
xlator_t *this = NULL;
gf_changelog_t *gfc = NULL;
gf_changelog_t *hist_gfc = NULL;
char buffer[PATH_MAX] = {0,};
errno = EINVAL;
this = THIS;
if (!this)
goto out;
gfc = (gf_changelog_t *) this->private;
if (!gfc)
goto out;
hist_gfc = gfc->hist_gfc;
if (!hist_gfc)
goto out;
tracker_fd = hist_gfc->gfc_fd;
size = gf_readline (tracker_fd, buffer, maxlen);
if (size < 0)
goto out;
if (size == 0)
return 0;
memcpy (bufptr, buffer, size - 1);
*(buffer + size) = '\0';
return size;
out:
return -1;
}
/*
* @API
* gf_history_changelog_scan:
* Scan and generate a list of change entries.
* Calling this api multiple times (without calling gf_changlog_done())
* would result new changelogs(s) being refreshed in the tracker file.
* This call also acts as a cancellation point for the consumer.
*
* RETURN VALUES:
* nr_entries: On success.
* -1 : On error.
*/
ssize_t
gf_history_changelog_scan ()
{
int ret = 0;
int tracker_fd = 0;
size_t len = 0;
size_t off = 0;
xlator_t *this = NULL;
size_t nr_entries = 0;
gf_changelog_t *gfc = NULL;
gf_changelog_t *hist_gfc = NULL;
struct dirent *entryp = NULL;
struct dirent *result = NULL;
char buffer[PATH_MAX] = {0,};
this = THIS;
if (!this)
goto out;
gfc = (gf_changelog_t *) this->private;
if (!gfc)
goto out;
hist_gfc = gfc->hist_gfc;
if (!hist_gfc)
goto out;
errno = EINVAL;
tracker_fd = hist_gfc->gfc_fd;
if (gf_ftruncate (tracker_fd, 0))
goto out;
len = offsetof(struct dirent, d_name)
+ pathconf(hist_gfc->gfc_processing_dir, _PC_NAME_MAX) + 1;
entryp = GF_CALLOC (1, len,
gf_changelog_mt_libgfchangelog_dirent_t);
if (!entryp)
goto out;
rewinddir (hist_gfc->gfc_dir);
while (1) {
ret = readdir_r (hist_gfc->gfc_dir, entryp, &result);
if (ret || !result)
break;
if ( !strcmp (basename (entryp->d_name), ".")
|| !strcmp (basename (entryp->d_name), "..") )
continue;
nr_entries++;
GF_CHANGELOG_FILL_BUFFER (hist_gfc->gfc_processing_dir,
buffer, off,
strlen (hist_gfc->gfc_processing_dir));
GF_CHANGELOG_FILL_BUFFER (entryp->d_name, buffer,
off, strlen (entryp->d_name));
GF_CHANGELOG_FILL_BUFFER ("\n", buffer, off, 1);
if (gf_changelog_write (tracker_fd, buffer, off) != off) {
gf_log (this->name, GF_LOG_ERROR,
"error writing changelog filename"
" to tracker file");
break;
}
off = 0;
}
GF_FREE (entryp);
if (!result) {
if (gf_lseek (tracker_fd, 0, SEEK_SET) != -1)
return nr_entries;
}
out:
return -1;
}
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