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-rw-r--r--xlators/lib/src/libxlator.c371
-rw-r--r--xlators/lib/src/libxlator.h86
2 files changed, 457 insertions, 0 deletions
diff --git a/xlators/lib/src/libxlator.c b/xlators/lib/src/libxlator.c
new file mode 100644
index 0000000..7708f86
--- /dev/null
+++ b/xlators/lib/src/libxlator.c
@@ -0,0 +1,371 @@
+#include "mem-types.h"
+#include "libxlator.h"
+
+
+/*Copy the contents of oldtimebuf to newtimbuf*/
+static void
+update_timebuf (uint32_t *oldtimbuf, uint32_t *newtimebuf)
+{
+ newtimebuf[0] = (oldtimbuf[0]);
+ newtimebuf[1] = (oldtimbuf[1]);
+}
+
+/* Convert Timebuf in network order to host order */
+static void
+get_hosttime (uint32_t *oldtimbuf, uint32_t *newtimebuf)
+{
+ newtimebuf[0] = ntohl (oldtimbuf[0]);
+ newtimebuf[1] = ntohl (oldtimbuf[1]);
+}
+
+
+
+/* Match the Incoming trusted.glusterfs.<uuid>.xtime against volume uuid */
+int
+match_uuid_local (const char *name, char *uuid)
+{
+ name = strtail ((char *)name, MARKER_XATTR_PREFIX);
+ if (!name || name++[0] != '.')
+ return -1;
+
+ name = strtail ((char *)name, uuid);
+ if (!name || strcmp (name, ".xtime") != 0)
+ return -1;
+
+ return 0;
+}
+
+
+
+
+/* Aggregate all the <volid>.xtime attrs of the cluster and send the max*/
+int32_t
+cluster_markerxtime_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno, dict_t *dict)
+
+{
+
+ int32_t callcnt = 0;
+ int ret = -1;
+ uint32_t *net_timebuf;
+ uint32_t host_timebuf[2];
+ char *marker_xattr;
+ struct marker_str *local;
+ char *vol_uuid;
+
+ if (!this || !frame || !frame->local || !cookie) {
+ gf_log (this->name, GF_LOG_DEBUG, "possible NULL deref");
+ goto out;
+ }
+
+ local = frame->local;
+ if (!local || !local->vol_uuid) {
+ gf_log (this->name, GF_LOG_DEBUG, "possible NULL deref");
+ goto out;
+ }
+
+ vol_uuid = local->vol_uuid;
+
+ if (op_ret && op_errno == ENOENT) {
+ LOCK (&frame->lock);
+ {
+ callcnt = --local->call_count;
+ local->enoent_count++;
+ }
+ goto done;
+ }
+
+ if (op_ret && op_errno == ENOTCONN) {
+ LOCK (&frame->lock);
+ {
+ callcnt = --local->call_count;
+ local->enotconn_count++;
+ }
+ goto done;
+ }
+
+
+ LOCK (&frame->lock);
+ {
+ callcnt = --local->call_count;
+ if (!gf_asprintf (& marker_xattr, "%s.%s.%s",
+ MARKER_XATTR_PREFIX, vol_uuid, XTIME)) {
+ op_errno = ENOMEM;
+ goto out;
+ }
+
+
+ if (dict_get_ptr (dict, marker_xattr, (void **)&net_timebuf)) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "Unable to get <uuid>.xtime attr");
+
+ goto done;
+ }
+
+ if (local->has_xtime) {
+
+ get_hosttime (net_timebuf, host_timebuf);
+ if ( (host_timebuf[0]>local->host_timebuf[0]) ||
+ (host_timebuf[0] == local->host_timebuf[0] &&
+ host_timebuf[1] >= local->host_timebuf[1])) {
+
+ update_timebuf (net_timebuf, local->net_timebuf);
+ update_timebuf (host_timebuf, local->host_timebuf);
+
+ }
+
+ }
+ else {
+ get_hosttime (net_timebuf, local->host_timebuf);
+ update_timebuf (net_timebuf, local->net_timebuf);
+ local->has_xtime = _gf_true;
+ }
+
+
+
+ }
+done:
+ UNLOCK (&frame->lock);
+
+ if (!callcnt) {
+
+ op_ret = 0;
+ op_errno = 0;
+ if (local->has_xtime) {
+ if (!dict) {
+ dict = dict_new();
+ if (ret) {
+ op_ret = -1;
+ op_errno = ENOMEM;
+ goto out;
+ }
+ }
+ ret = dict_set_static_bin (dict, marker_xattr,
+ (void *)local->net_timebuf, 8);
+ if (ret) {
+ op_ret = -1;
+ op_errno = ENOMEM;
+ goto out;
+ }
+ }
+ else {
+ op_ret = -1;
+ if (local->enotconn_count) {
+ op_errno = ENOTCONN;
+ goto out;
+ }
+ if (local->enoent_count) {
+ op_errno = ENOENT;
+ goto out;
+ }
+ else {
+ op_errno = EINVAL;
+ goto out;
+ }
+ }
+out:
+ if (local->xl_specf_unwind) {
+ frame->local = local->xl_local;
+ local->xl_specf_unwind (getxattr, frame, op_ret,
+ op_errno, dict);
+ return 0;
+ }
+ STACK_UNWIND_STRICT (getxattr, frame, op_ret, op_errno, dict);
+
+ }
+
+ return 0;
+
+}
+
+int32_t
+cluster_markeruuid_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno, dict_t *dict)
+{
+ int32_t callcnt = 0;
+ data_t *data = NULL;
+ struct volume_mark *volmark = NULL;
+ struct marker_str *marker = NULL;
+ char *vol_uuid;
+
+
+ if (!this || !frame || !cookie) {
+ gf_log (this->name, GF_LOG_DEBUG, "possible NULL deref");
+ goto out;
+ }
+
+ marker = frame->local;
+
+ if (!marker) {
+ gf_log (this->name, GF_LOG_DEBUG, "possible NULL deref");
+ goto out;
+ }
+
+ vol_uuid = marker->vol_uuid;
+
+ if (op_ret && (ENOENT == op_errno)) {
+ LOCK (&frame->lock);
+ {
+ callcnt = --marker->call_count;
+ marker->enoent_count++;
+ }
+ goto done;
+ }
+
+ if (op_ret && (ENOTCONN == op_errno)) {
+ LOCK (&frame->lock);
+ {
+ callcnt = --marker->call_count;
+ marker->enotconn_count++;
+ }
+ goto done;
+ }
+
+ if (!(data = dict_get (dict, GF_XATTR_MARKER_KEY))) {
+ LOCK (&frame->lock);
+ {
+ callcnt = --marker->call_count;
+ }
+ goto done;
+ }
+
+ volmark = (struct volume_mark *)data->data;
+
+ LOCK (&frame->lock);
+ {
+ callcnt = --marker->call_count;
+
+ if (marker_has_volinfo (marker)) {
+
+ if ((marker->volmark->major != volmark->major) ||
+ (marker->volmark->minor != volmark->minor)) {
+ op_ret = -1;
+ op_errno = EINVAL;
+ goto out;
+ }
+ else if (volmark->retval) {
+ data_unref ((data_t *) marker->volmark);
+ marker->volmark = volmark;
+ callcnt = 0;
+ }
+ else if ( (volmark->sec > marker->volmark->sec) ||
+ ((volmark->sec == marker->volmark->sec)
+ && (volmark->usec >= marker->volmark->usec))) {
+
+ marker->volmark = volmark;
+ }
+
+ } else {
+ marker->volmark = volmark;
+ uuid_unparse (volmark->uuid, vol_uuid);
+ if (volmark->retval)
+ callcnt = 0;
+ }
+ }
+done:
+ UNLOCK (&frame->lock);
+
+ if (!callcnt) {
+ op_ret = 0;
+ op_errno = 0;
+ if (marker_has_volinfo (marker)) {
+ if (!dict) {
+ dict = dict_new();
+ if (!dict) {
+ op_ret = -1;
+ op_errno = ENOMEM;
+ goto out;
+ }
+ }
+ if (dict_set_static_bin (dict, GF_XATTR_MARKER_KEY,
+ marker->volmark,
+ sizeof (struct volume_mark))) {
+ op_ret = -1;
+ op_errno = ENOMEM;
+ }
+ goto out;
+ }
+ if (marker->enotconn_count) {
+ op_ret = -1;
+ op_errno = ENOTCONN;
+ goto out;
+ }
+ if (marker->enoent_count) {
+ op_ret = -1;
+ op_errno = ENOENT;
+ }
+ else {
+ op_ret = -1;
+ op_errno = EINVAL;
+ }
+
+ out:
+ if (marker->xl_specf_unwind) {
+ frame->local = marker->xl_local;
+ marker->xl_specf_unwind (getxattr, frame, op_ret,
+ op_errno, dict);
+ return 0;
+ }
+ STACK_UNWIND_STRICT (getxattr, frame, op_ret, op_errno, dict);
+ }
+ return 0;
+}
+
+
+int32_t
+cluster_getmarkerattr (call_frame_t *frame,xlator_t *this, loc_t *loc,
+ const char *name, void *xl_local,
+ xlator_specf_unwind_t xl_specf_getxattr_unwind,
+ xlator_t **sub_volumes, int count, int type,
+ char *vol_uuid)
+{
+ int i;
+ struct marker_str *local;
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+ VALIDATE_OR_GOTO (loc->path, err);
+ VALIDATE_OR_GOTO (loc->inode, err);
+ VALIDATE_OR_GOTO (name, err);
+ VALIDATE_OR_GOTO (xl_specf_getxattr_unwind, err);
+
+ local = GF_CALLOC (sizeof (struct marker_str), 1,
+ gf_common_mt_libxl_marker_local);
+
+ local->xl_local = xl_local;
+ frame->local = local;
+
+ local->call_count = count;
+
+ local->xl_specf_unwind = xl_specf_getxattr_unwind;
+
+ local->vol_uuid = vol_uuid;
+
+ for (i=0; i < count; i++) {
+ if (MARKER_UUID_TYPE == type)
+ STACK_WIND (frame, cluster_markeruuid_cbk,
+ *(sub_volumes + i),
+ (*(sub_volumes + i))->fops->getxattr,
+ loc, name);
+ else if (MARKER_XTIME_TYPE == type)
+ STACK_WIND (frame, cluster_markerxtime_cbk,
+ *(sub_volumes + i),
+ (*(sub_volumes + i))->fops->getxattr,
+ loc, name);
+ else {
+ gf_log (this->name, GF_LOG_WARNING,
+ "Unrecognized type of marker attr recived");
+ STACK_WIND (frame, default_getxattr_cbk,
+ *(sub_volumes + i),
+ (*(sub_volumes + i))->fops->getxattr,
+ loc, name);
+ break;
+ }
+ }
+
+ return 0;
+err:
+ return -1;
+
+}
diff --git a/xlators/lib/src/libxlator.h b/xlators/lib/src/libxlator.h
new file mode 100644
index 0000000..be8a009
--- /dev/null
+++ b/xlators/lib/src/libxlator.h
@@ -0,0 +1,86 @@
+#ifndef _LIBXLATOR_H
+#define _LIBXLATOR_H
+
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "xlator.h"
+#include "logging.h"
+#include "defaults.h"
+#include "common-utils.h"
+#include "compat.h"
+#include "compat-errno.h"
+
+
+#define MARKER_XATTR_PREFIX "trusted.glusterfs"
+#define XTIME "xtime"
+#define VOLUME_MARK "volume-mark"
+#define GF_XATTR_MARKER_KEY MARKER_XATTR_PREFIX "." VOLUME_MARK
+#define UUID_SIZE 36
+#define MARKER_UUID_TYPE 1
+#define MARKER_XTIME_TYPE 2
+
+
+typedef int32_t (*xlator_specf_unwind_t) (void *getxattr, call_frame_t *frame,
+ int op_ret, int op_errno, dict_t *dict);
+
+
+struct volume_mark {
+ uint8_t major;
+ uint8_t minor;
+ uint8_t uuid[16];
+ uint8_t retval;
+ uint32_t sec;
+ uint32_t usec;
+}__attribute__ ((__packed__));
+
+struct marker_str {
+ struct volume_mark *volmark;
+ data_t *data;
+
+ uint32_t host_timebuf[2];
+ uint32_t net_timebuf[2];
+ int32_t call_count;
+ unsigned has_xtime:1;
+ int32_t enoent_count;
+ int32_t enotconn_count;
+
+ xlator_specf_unwind_t xl_specf_unwind;
+ void *xl_local;
+ char *vol_uuid;
+};
+
+static inline gf_boolean_t
+marker_has_volinfo (struct marker_str *marker)
+{
+ if (marker->volmark)
+ return _gf_true;
+ else
+ return _gf_false;
+}
+
+int32_t
+cluster_markerxtime_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno, dict_t *dict);
+
+int32_t
+cluster_markeruuid_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno, dict_t *dict);
+
+int32_t
+cluster_getmarkerattr (call_frame_t *frame,xlator_t *this, loc_t *loc,
+ const char *name, void *xl_local,
+ xlator_specf_unwind_t xl_specf_getxattr_unwind,
+ xlator_t **sub_volumes, int count, int type,
+ char *vol_uuid);
+
+int
+match_uuid_local (const char *name, char *uuid);
+
+
+
+
+#endif /* !_LIBXLATOR_H */