4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * (C) Copyright 2012 Commissariat a l'energie atomique et aux energies
9 * All rights reserved. This program and the accompanying materials
10 * are made available under the terms of the GNU Lesser General Public License
11 * (LGPL) version 2.1 or (at your discretion) any later version.
12 * (LGPL) version 2.1 accompanies this distribution, and is available at
13 * http://www.gnu.org/licenses/lgpl-2.1.html
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
23 * lustre/utils/liblustreapi_hsm.c
25 * lustreapi library for hsm calls
27 * Author: Aurelien Degremont <aurelien.degremont@cea.fr>
28 * Author: JC Lafoucriere <jacques-charles.lafoucriere@cea.fr>
29 * Author: Thomas Leibovici <thomas.leibovici@cea.fr>
30 * Author: Henri Doreau <henri.doreau@cea.fr>
37 #include <sys/ioctl.h>
44 #include <sys/types.h>
46 #include <sys/syscall.h>
50 #ifdef HAVE_LINUX_UNISTD_H
51 #include <linux/unistd.h>
56 #include <liblustre.h>
57 #include <lnet/lnetctl.h>
60 #include <lustre/lustreapi.h>
61 #include "lustreapi_internal.h"
63 #define OPEN_BY_FID_PATH dot_lustre_name"/fid"
65 /****** HSM Copytool API ********/
66 #define CT_PRIV_MAGIC 0xC0BE2001
67 struct hsm_copytool_private {
72 lustre_kernelcomm kuc;
76 #define CP_PRIV_MAGIC 0x19880429
77 struct hsm_copyaction_private {
80 const struct hsm_copytool_private *ct_priv;
85 #include <libcfs/libcfs.h>
87 enum ct_progress_type {
98 CT_ARCHIVE_START = HSMA_ARCHIVE,
99 CT_ARCHIVE_RUNNING = HSMA_ARCHIVE + CT_RUNNING,
100 CT_ARCHIVE_FINISH = HSMA_ARCHIVE + CT_FINISH,
101 CT_ARCHIVE_CANCEL = HSMA_ARCHIVE + CT_CANCEL,
102 CT_ARCHIVE_ERROR = HSMA_ARCHIVE + CT_ERROR,
103 CT_RESTORE_START = HSMA_RESTORE,
104 CT_RESTORE_RUNNING = HSMA_RESTORE + CT_RUNNING,
105 CT_RESTORE_FINISH = HSMA_RESTORE + CT_FINISH,
106 CT_RESTORE_CANCEL = HSMA_RESTORE + CT_CANCEL,
107 CT_RESTORE_ERROR = HSMA_RESTORE + CT_ERROR,
108 CT_REMOVE_START = HSMA_REMOVE,
109 CT_REMOVE_RUNNING = HSMA_REMOVE + CT_RUNNING,
110 CT_REMOVE_FINISH = HSMA_REMOVE + CT_FINISH,
111 CT_REMOVE_CANCEL = HSMA_REMOVE + CT_CANCEL,
112 CT_REMOVE_ERROR = HSMA_REMOVE + CT_ERROR,
116 /* initialized in llapi_hsm_register_event_fifo() */
117 static int llapi_hsm_event_fd = -1;
118 static bool created_hsm_event_fifo;
120 static inline const char *llapi_hsm_ct_ev2str(int type)
127 case CT_ARCHIVE_START:
128 return "ARCHIVE_START";
129 case CT_ARCHIVE_RUNNING:
130 return "ARCHIVE_RUNNING";
131 case CT_ARCHIVE_FINISH:
132 return "ARCHIVE_FINISH";
133 case CT_ARCHIVE_CANCEL:
134 return "ARCHIVE_CANCEL";
135 case CT_ARCHIVE_ERROR:
136 return "ARCHIVE_ERROR";
137 case CT_RESTORE_START:
138 return "RESTORE_START";
139 case CT_RESTORE_RUNNING:
140 return "RESTORE_RUNNING";
141 case CT_RESTORE_FINISH:
142 return "RESTORE_FINISH";
143 case CT_RESTORE_CANCEL:
144 return "RESTORE_CANCEL";
145 case CT_RESTORE_ERROR:
146 return "RESTORE_ERROR";
147 case CT_REMOVE_START:
148 return "REMOVE_START";
149 case CT_REMOVE_RUNNING:
150 return "REMOVE_RUNNING";
151 case CT_REMOVE_FINISH:
152 return "REMOVE_FINISH";
153 case CT_REMOVE_CANCEL:
154 return "REMOVE_CANCEL";
155 case CT_REMOVE_ERROR:
156 return "REMOVE_ERROR";
158 llapi_err_noerrno(LLAPI_MSG_ERROR,
159 "Unknown event type: %d", type);
165 * Writes a JSON event to the monitor FIFO. Noop if no FIFO has been
168 * \param event A list of llapi_json_items comprising a
169 * single JSON-formatted event.
171 * \retval 0 on success.
172 * \retval -errno on error.
174 int llapi_hsm_write_json_event(struct llapi_json_item_list **event)
177 char time_string[40];
178 char json_buf[PIPE_BUF];
180 time_t event_time = time(0);
181 struct tm time_components;
182 struct llapi_json_item_list *json_items;
184 /* Noop unless the event fd was initialized */
185 if (llapi_hsm_event_fd < 0)
188 if (event == NULL || *event == NULL)
193 localtime_r(&event_time, &time_components);
195 if (strftime(time_string, sizeof(time_string), "%Y-%m-%d %T %z",
196 &time_components) == 0) {
198 llapi_error(LLAPI_MSG_ERROR, rc, "strftime() failed");
202 rc = llapi_json_add_item(&json_items, "event_time", LLAPI_JSON_STRING,
205 llapi_error(LLAPI_MSG_ERROR, -rc, "error in "
206 "llapi_json_add_item()");
210 buf_file = fmemopen(json_buf, sizeof(json_buf), "w");
211 if (buf_file == NULL)
214 rc = llapi_json_write_list(event, buf_file);
222 if (write(llapi_hsm_event_fd, json_buf, strlen(json_buf)) < 0) {
223 /* Ignore write failures due to missing reader. */
232 * Hook for llapi_hsm_copytool_register and llapi_hsm_copytool_unregister
233 * to generate JSON events suitable for consumption by a copytool
234 * monitoring process.
236 * \param priv Opaque private control structure.
237 * \param event_type The type of event (register or unregister).
239 * \retval 0 on success.
240 * \retval -errno on error.
242 int llapi_hsm_log_ct_registration(struct hsm_copytool_private **priv,
246 char agent_uuid[UUID_MAX];
247 struct hsm_copytool_private *ct;
248 struct llapi_json_item_list *json_items;
250 if (priv == NULL || *priv == NULL)
254 if (ct->magic != CT_PRIV_MAGIC)
257 if (event_type != CT_REGISTER && event_type != CT_UNREGISTER)
260 rc = llapi_json_init_list(&json_items);
264 rc = llapi_get_agent_uuid(ct->mnt, agent_uuid, sizeof(agent_uuid));
267 llapi_chomp_string(agent_uuid);
269 rc = llapi_json_add_item(&json_items, "uuid", LLAPI_JSON_STRING,
274 rc = llapi_json_add_item(&json_items, "mount_point", LLAPI_JSON_STRING,
279 rc = llapi_json_add_item(&json_items, "archive", LLAPI_JSON_INTEGER,
284 rc = llapi_json_add_item(&json_items, "event_type", LLAPI_JSON_STRING,
285 (char *)llapi_hsm_ct_ev2str(event_type));
289 rc = llapi_hsm_write_json_event(&json_items);
296 llapi_error(LLAPI_MSG_ERROR, rc, "error in "
297 "llapi_hsm_log_ct_registration()");
300 if (json_items != NULL)
301 llapi_json_destroy_list(&json_items);
307 * Given a copytool progress update, construct a JSON event suitable for
308 * consumption by a copytool monitoring process.
310 * Examples of various events generated here and written by
311 * llapi_hsm_write_json_event:
313 * Copytool registration and deregistration:
314 * {"event_time": "2014-02-26 14:58:01 -0500", "event_type": "REGISTER", "archive": 0, "mount_point": "/mnt/lustre", "uuid": "80379a60-1f8a-743f-daf2-307cde793ec2"}
315 * {"event_time": "2014-02-26 14:58:01 -0500", "event_type": "UNREGISTER", "archive": 0, "mount_point": "/mnt/lustre", "uuid": "80379a60-1f8a-743f-daf2-307cde793ec2"}
317 * An archive action, start to completion:
318 * {"event_time": "2014-02-26 14:50:13 -0500", "event_type": "ARCHIVE_START", "total_bytes": 0, "lustre_path": "d71.sanity-hsm/f71.sanity-hsm", "source_fid": "0x2000013a1:0x2:0x0", "data_fid": "0x2000013a1:0x2:0x0"}
319 * {"event_time": "2014-02-26 14:50:18 -0500", "event_type": "ARCHIVE_RUNNING", "current_bytes": 5242880, "total_bytes": 39000000, "lustre_path": "d71.sanity-hsm/f71.sanity-hsm", "source_fid": "0x2000013a1:0x2:0x0", "data_fid": "0x2000013a1:0x2:0x0"}
320 * {"event_time": "2014-02-26 14:50:50 -0500", "event_type": "ARCHIVE_FINISH", "source_fid": "0x2000013a1:0x2:0x0", "data_fid": "0x2000013a1:0x2:0x0"}
323 * {"event_time": "2014-02-26 14:50:13 -0500", "event_type": "LOGGED_MESSAGE", "level": "INFO", "message": "lhsmtool_posix[59401]: copytool fs=lustre archive#=2 item_count=1"}
325 * \param hcp Opaque action handle returned by
326 * llapi_hsm_action_start.
327 * \param hai The hsm_action_item describing the request.
328 * \param progress_type The ct_progress_type describing the update.
329 * \param total The total expected bytes for the request.
330 * \param current The current copied byte count for the request.
332 * \retval 0 on success.
333 * \retval -errno on error.
335 int llapi_hsm_log_ct_progress(struct hsm_copyaction_private **phcp,
336 const struct hsm_action_item *hai, __u32 progress_type,
337 __u64 total, __u64 current)
341 long long recno = -1;
342 char lustre_path[PATH_MAX];
343 char strfid[FID_NOBRACE_LEN + 1];
344 struct hsm_copyaction_private *hcp;
345 struct llapi_json_item_list *json_items;
347 if (phcp == NULL || *phcp == NULL)
352 rc = llapi_json_init_list(&json_items);
356 snprintf(strfid, sizeof(strfid), DFID_NOBRACE, PFID(&hai->hai_dfid));
357 rc = llapi_json_add_item(&json_items, "data_fid",
358 LLAPI_JSON_STRING, strfid);
362 snprintf(strfid, sizeof(strfid), DFID_NOBRACE, PFID(&hai->hai_fid));
363 rc = llapi_json_add_item(&json_items, "source_fid",
364 LLAPI_JSON_STRING, strfid);
368 if (hcp->copy.hc_errval == ECANCELED) {
369 progress_type = CT_CANCEL;
373 if (hcp->copy.hc_errval != 0) {
374 progress_type = CT_ERROR;
376 rc = llapi_json_add_item(&json_items, "errno",
378 &hcp->copy.hc_errval);
382 rc = llapi_json_add_item(&json_items, "error",
384 strerror(hcp->copy.hc_errval));
391 /* lustre_path isn't available after a restore completes */
392 /* total_bytes isn't available after a restore or archive completes */
393 if (progress_type != CT_FINISH) {
394 rc = llapi_fid2path(hcp->ct_priv->mnt, strfid, lustre_path,
395 sizeof(lustre_path), &recno, &linkno);
399 rc = llapi_json_add_item(&json_items, "lustre_path",
400 LLAPI_JSON_STRING, lustre_path);
404 rc = llapi_json_add_item(&json_items, "total_bytes",
405 LLAPI_JSON_BIGNUM, &total);
410 if (progress_type == CT_RUNNING)
411 rc = llapi_json_add_item(&json_items, "current_bytes",
412 LLAPI_JSON_BIGNUM, ¤t);
417 rc = llapi_json_add_item(&json_items, "event_type", LLAPI_JSON_STRING,
418 (char *)llapi_hsm_ct_ev2str(hai->hai_action +
423 rc = llapi_hsm_write_json_event(&json_items);
430 llapi_error(LLAPI_MSG_ERROR, rc, "error in "
431 "llapi_hsm_log_ct_progress()");
434 if (json_items != NULL)
435 llapi_json_destroy_list(&json_items);
441 * Given a path to a FIFO, create a filehandle for nonblocking writes to it.
442 * Intended to be used for copytool monitoring processes that read an
443 * event stream from the FIFO. Events written in the absence of a reader
446 * \param path Path to monitor FIFO.
448 * \retval 0 on success.
449 * \retval -errno on error.
451 int llapi_hsm_register_event_fifo(const char *path)
456 /* Create the FIFO if necessary. */
457 if ((mkfifo(path, 0644) < 0) && (errno != EEXIST)) {
458 llapi_error(LLAPI_MSG_ERROR, errno, "mkfifo(%s) failed", path);
461 if (errno == EEXIST) {
462 if (stat(path, &statbuf) < 0) {
463 llapi_error(LLAPI_MSG_ERROR, errno, "mkfifo(%s) failed",
467 if (!S_ISFIFO(statbuf.st_mode) ||
468 ((statbuf.st_mode & 0777) != 0644)) {
469 llapi_error(LLAPI_MSG_ERROR, errno, "%s exists but is "
470 "not a pipe or has a wrong mode", path);
474 created_hsm_event_fifo = true;
477 /* Open the FIFO for read so that the subsequent open for write
478 * doesn't immediately fail. */
479 read_fd = open(path, O_RDONLY | O_NONBLOCK);
481 llapi_error(LLAPI_MSG_ERROR, errno,
482 "cannot open(%s) for read", path);
486 /* Open the FIFO for writes, but don't block on waiting
488 llapi_hsm_event_fd = open(path, O_WRONLY | O_NONBLOCK);
489 if (llapi_hsm_event_fd < 0) {
490 llapi_error(LLAPI_MSG_ERROR, errno,
491 "cannot open(%s) for write", path);
495 /* Now close the reader. An external monitoring process can
496 * now open the FIFO for reads. If no reader comes along the
497 * events are lost. NOTE: Only one reader at a time! */
500 /* Ignore SIGPIPEs -- can occur if the reader goes away. */
501 signal(SIGPIPE, SIG_IGN);
507 * Given a path to a FIFO, close its filehandle and delete the FIFO.
509 * \param path Path to monitor FIFO.
511 * \retval 0 on success.
512 * \retval -errno on error.
514 int llapi_hsm_unregister_event_fifo(const char *path)
516 /* Noop unless the event fd was initialized */
517 if (llapi_hsm_event_fd < 0)
520 if (close(llapi_hsm_event_fd) < 0)
523 if (created_hsm_event_fifo) {
525 created_hsm_event_fifo = false;
528 llapi_hsm_event_fd = -1;
534 * Custom logging callback to be used when a monitoring FIFO has been
535 * registered. Formats log entries as JSON events suitable for
536 * consumption by a copytool monitoring process.
538 * \param level The message loglevel.
539 * \param _rc The returncode associated with the message.
540 * \param fmt The message format string.
541 * \param args Arguments to be formatted by the format string.
545 void llapi_hsm_log_error(enum llapi_message_level level, int _rc,
546 const char *fmt, va_list args)
553 struct llapi_json_item_list *json_items;
555 /* Noop unless the event fd was initialized */
556 if (llapi_hsm_event_fd < 0)
559 rc = llapi_json_init_list(&json_items);
563 if ((level & LLAPI_MSG_NO_ERRNO) == 0) {
564 rc = llapi_json_add_item(&json_items, "errno",
570 rc = llapi_json_add_item(&json_items, "error",
577 va_copy(args2, args);
578 msg_len = vsnprintf(NULL, 0, fmt, args2) + 1;
581 msg = (char *) alloca(msg_len);
587 rc = vsnprintf(msg, msg_len, fmt, args);
591 rc = llapi_json_add_item(&json_items, "message",
597 rc = llapi_json_add_item(&json_items, "message",
599 "INTERNAL ERROR: message failed");
604 real_level = level & LLAPI_MSG_NO_ERRNO;
605 real_level = real_level > 0 ? level - LLAPI_MSG_NO_ERRNO : level;
607 rc = llapi_json_add_item(&json_items, "level", LLAPI_JSON_STRING,
608 (void *)llapi_msg_level2str(real_level));
612 rc = llapi_json_add_item(&json_items, "event_type", LLAPI_JSON_STRING,
617 rc = llapi_hsm_write_json_event(&json_items);
624 /* Write directly to stderr to avoid llapi_error, which now
625 * emits JSON event messages. */
626 fprintf(stderr, "\nFATAL ERROR IN llapi_hsm_log_error(): rc %d,", rc);
629 if (json_items != NULL)
630 llapi_json_destroy_list(&json_items);
635 /** Register a copytool
636 * \param[out] priv Opaque private control structure
637 * \param mnt Lustre filesystem mount point
638 * \param archive_count
639 * \param archives Which archive numbers this copytool is responsible for
640 * \param rfd_flags flags applied to read fd of pipe (e.g. O_NONBLOCK)
642 int llapi_hsm_copytool_register(struct hsm_copytool_private **priv,
643 const char *mnt, int archive_count,
644 int *archives, int rfd_flags)
646 struct hsm_copytool_private *ct;
649 if (archive_count > 0 && archives == NULL) {
650 llapi_err_noerrno(LLAPI_MSG_ERROR,
651 "NULL archive numbers");
655 ct = calloc(1, sizeof(*ct));
659 ct->magic = CT_PRIV_MAGIC;
661 ct->open_by_fid_fd = -1;
662 ct->kuc.lk_rfd = LK_NOFD;
663 ct->kuc.lk_wfd = LK_NOFD;
665 ct->mnt = strdup(mnt);
666 if (ct->mnt == NULL) {
671 ct->mnt_fd = open(ct->mnt, O_RDONLY);
672 if (ct->mnt_fd < 0) {
677 ct->open_by_fid_fd = openat(ct->mnt_fd, OPEN_BY_FID_PATH, O_RDONLY);
678 if (ct->open_by_fid_fd < 0) {
683 /* no archives specified means "match all". */
685 for (rc = 0; rc < archive_count; rc++) {
686 if (archives[rc] > 8 * sizeof(ct->archives)) {
687 llapi_err_noerrno(LLAPI_MSG_ERROR,
688 "maximum of %zu archives supported",
689 8 * sizeof(ct->archives));
692 /* in the list we have a all archive wildcard
693 * so move to all archives mode
695 if (archives[rc] == 0) {
700 ct->archives |= (1 << (archives[rc] - 1));
703 rc = libcfs_ukuc_start(&ct->kuc, KUC_GRP_HSM, rfd_flags);
707 /* Storing archive(s) in lk_data; see mdc_ioc_hsm_ct_start */
708 ct->kuc.lk_data = ct->archives;
709 rc = ioctl(ct->mnt_fd, LL_IOC_HSM_CT_START, &ct->kuc);
712 llapi_error(LLAPI_MSG_ERROR, rc,
713 "cannot start copytool on '%s'", mnt);
719 llapi_hsm_log_ct_registration(&ct, CT_REGISTER);
721 /* Only the kernel reference keeps the write side open */
722 close(ct->kuc.lk_wfd);
723 ct->kuc.lk_wfd = LK_NOFD;
731 /* cleanup the kuc channel */
732 libcfs_ukuc_stop(&ct->kuc);
735 if (!(ct->mnt_fd < 0))
738 if (!(ct->open_by_fid_fd < 0))
739 close(ct->open_by_fid_fd);
749 /** Deregister a copytool
750 * Note: under Linux, until llapi_hsm_copytool_unregister is called
751 * (or the program is killed), the libcfs module will be referenced
752 * and unremovable, even after Lustre services stop.
754 int llapi_hsm_copytool_unregister(struct hsm_copytool_private **priv)
756 struct hsm_copytool_private *ct;
758 if (priv == NULL || *priv == NULL)
762 if (ct->magic != CT_PRIV_MAGIC)
765 /* Tell the kernel to stop sending us messages */
766 ct->kuc.lk_flags = LK_FLG_STOP;
767 ioctl(ct->mnt_fd, LL_IOC_HSM_CT_START, &ct->kuc);
769 /* Shut down the kernelcomms */
770 libcfs_ukuc_stop(&ct->kuc);
772 llapi_hsm_log_ct_registration(&ct, CT_UNREGISTER);
774 close(ct->open_by_fid_fd);
783 /** Returns a file descriptor to poll/select on.
784 * \param ct Opaque private control structure
785 * \retval -EINVAL on error
786 * \retval the file descriptor for reading HSM events from the kernel
788 int llapi_hsm_copytool_get_fd(struct hsm_copytool_private *ct)
790 if (ct == NULL || ct->magic != CT_PRIV_MAGIC)
793 return libcfs_ukuc_get_rfd(&ct->kuc);
796 /** Wait for the next hsm_action_list
797 * \param ct Opaque private control structure
798 * \param halh Action list handle, will be allocated here
799 * \param msgsize Number of bytes in the message, will be set here
800 * \return 0 valid message received; halh and msgsize are set
803 int llapi_hsm_copytool_recv(struct hsm_copytool_private *ct,
804 struct hsm_action_list **halh, int *msgsize)
806 struct kuc_hdr *kuch;
807 struct hsm_action_list *hal;
810 if (ct == NULL || ct->magic != CT_PRIV_MAGIC)
813 if (halh == NULL || msgsize == NULL)
816 kuch = malloc(HAL_MAXSIZE + sizeof(*kuch));
821 rc = libcfs_ukuc_msg_get(&ct->kuc, (char *)kuch,
822 HAL_MAXSIZE + sizeof(*kuch),
827 /* Handle generic messages */
828 if (kuch->kuc_transport == KUC_TRANSPORT_GENERIC &&
829 kuch->kuc_msgtype == KUC_MSG_SHUTDOWN) {
834 if (kuch->kuc_transport != KUC_TRANSPORT_HSM ||
835 kuch->kuc_msgtype != HMT_ACTION_LIST) {
836 llapi_err_noerrno(LLAPI_MSG_ERROR,
837 "Unknown HSM message type %d:%d\n",
838 kuch->kuc_transport, kuch->kuc_msgtype);
843 if (kuch->kuc_msglen < sizeof(*kuch) + sizeof(*hal)) {
844 llapi_err_noerrno(LLAPI_MSG_ERROR, "Short HSM message %d",
850 /* Our message is a hsm_action_list. Use pointer math to skip
851 * kuch_hdr and point directly to the message payload.
853 hal = (struct hsm_action_list *)(kuch + 1);
855 /* Check that we have registered for this archive #
856 * if 0 registered, we serve any archive */
858 ((1 << (hal->hal_archive_id - 1)) & ct->archives) == 0) {
859 llapi_err_noerrno(LLAPI_MSG_INFO,
860 "This copytool does not service archive #%d,"
861 " ignoring this request."
862 " Mask of served archive is 0x%.8X",
863 hal->hal_archive_id, ct->archives);
869 *msgsize = kuch->kuc_msglen - sizeof(*kuch);
879 /** Release the action list when done with it. */
880 void llapi_hsm_action_list_free(struct hsm_action_list **hal)
882 /* Reuse the llapi_changelog_free function */
883 llapi_changelog_free((struct changelog_ext_rec **)hal);
886 /** Get parent path from mount point and fid.
888 * \param mnt Filesystem root path.
889 * \param fid Object FID.
890 * \param parent Destination buffer.
891 * \param parent_len Destination buffer size.
892 * \return 0 on success.
894 static int fid_parent(const char *mnt, const lustre_fid *fid, char *parent,
899 long long recno = -1;
901 char strfid[FID_NOBRACE_LEN + 1];
904 snprintf(strfid, sizeof(strfid), DFID_NOBRACE, PFID(fid));
906 rc = llapi_fid2path(mnt, strfid, file, sizeof(file),
911 /* fid2path returns a relative path */
912 rc = snprintf(parent, parent_len, "%s/%s", mnt, file);
913 if (rc >= parent_len)
914 return -ENAMETOOLONG;
916 /* remove file name */
917 ptr = strrchr(parent, '/');
918 if (ptr == NULL || ptr == parent) {
928 static int ct_open_by_fid(const struct hsm_copytool_private *ct,
929 const struct lu_fid *fid, int open_flags)
931 char fid_name[FID_NOBRACE_LEN + 1];
934 snprintf(fid_name, sizeof(fid_name), DFID_NOBRACE, PFID(fid));
936 fd = openat(ct->open_by_fid_fd, fid_name, open_flags);
937 return fd < 0 ? -errno : fd;
940 static int ct_stat_by_fid(const struct hsm_copytool_private *ct,
941 const struct lu_fid *fid,
944 char fid_name[FID_NOBRACE_LEN + 1];
947 snprintf(fid_name, sizeof(fid_name), DFID_NOBRACE, PFID(fid));
949 rc = fstatat(ct->open_by_fid_fd, fid_name, buf, 0);
950 return rc ? -errno : 0;
953 /** Create the destination volatile file for a restore operation.
955 * \param hcp Private copyaction handle.
956 * \param mdt_index MDT index where to create the volatile file.
957 * \param flags Volatile file creation flags.
958 * \return 0 on success.
960 static int create_restore_volatile(struct hsm_copyaction_private *hcp,
961 int mdt_index, int open_flags)
965 char parent[PATH_MAX + 1];
966 const char *mnt = hcp->ct_priv->mnt;
967 struct hsm_action_item *hai = &hcp->copy.hc_hai;
969 rc = fid_parent(mnt, &hai->hai_fid, parent, sizeof(parent));
971 /* fid_parent() failed, try to keep on going */
972 llapi_error(LLAPI_MSG_ERROR, rc,
973 "cannot get parent path to restore "DFID" "
974 "using '%s'", PFID(&hai->hai_fid), mnt);
975 snprintf(parent, sizeof(parent), "%s", mnt);
978 fd = llapi_create_volatile_idx(parent, mdt_index, open_flags);
982 rc = fchown(fd, hcp->stat.st_uid, hcp->stat.st_gid);
986 rc = llapi_fd2fid(fd, &hai->hai_dfid);
1001 /** Start processing an HSM action.
1002 * Should be called by copytools just before starting handling a request.
1003 * It could be skipped if copytool only want to directly report an error,
1004 * \see llapi_hsm_action_end().
1006 * \param hcp Opaque action handle to be passed to
1007 * llapi_hsm_action_progress and llapi_hsm_action_end.
1008 * \param ct Copytool handle acquired at registration.
1009 * \param hai The hsm_action_item describing the request.
1010 * \param restore_mdt_index On restore: MDT index where to create the volatile
1011 * file. Use -1 for default.
1012 * \param restore_open_flags On restore: volatile file creation mode. Use
1013 * O_LOV_DELAY_CREATE to manually set the LOVEA
1015 * \param is_error Whether this call is just to report an error.
1017 * \return 0 on success.
1019 int llapi_hsm_action_begin(struct hsm_copyaction_private **phcp,
1020 const struct hsm_copytool_private *ct,
1021 const struct hsm_action_item *hai,
1022 int restore_mdt_index, int restore_open_flags,
1025 struct hsm_copyaction_private *hcp;
1028 hcp = calloc(1, sizeof(*hcp));
1034 hcp->copy.hc_hai = *hai;
1035 hcp->copy.hc_hai.hai_len = sizeof(*hai);
1040 if (hai->hai_action == HSMA_RESTORE) {
1041 rc = ct_stat_by_fid(hcp->ct_priv, &hai->hai_fid, &hcp->stat);
1045 rc = create_restore_volatile(hcp, restore_mdt_index,
1046 restore_open_flags);
1051 rc = ioctl(ct->mnt_fd, LL_IOC_HSM_COPY_START, &hcp->copy);
1057 llapi_hsm_log_ct_progress(&hcp, hai, CT_START, 0, 0);
1060 hcp->magic = CP_PRIV_MAGIC;
1065 if (!(hcp->data_fd < 0))
1066 close(hcp->data_fd);
1073 /** Terminate an HSM action processing.
1074 * Should be called by copytools just having finished handling the request.
1075 * \param hdl[in,out] Handle returned by llapi_hsm_action_start.
1076 * \param he[in] The final range of copied data (for copy actions).
1077 * \param errval[in] The status code of the operation.
1078 * \param flags[in] The flags about the termination status (HP_FLAG_RETRY if
1079 * the error is retryable).
1081 * \return 0 on success.
1083 int llapi_hsm_action_end(struct hsm_copyaction_private **phcp,
1084 const struct hsm_extent *he, int hp_flags, int errval)
1086 struct hsm_copyaction_private *hcp;
1087 struct hsm_action_item *hai;
1090 if (phcp == NULL || *phcp == NULL || he == NULL)
1095 if (hcp->magic != CP_PRIV_MAGIC)
1098 hai = &hcp->copy.hc_hai;
1100 if (hai->hai_action == HSMA_RESTORE && errval == 0) {
1101 struct timeval tv[2];
1103 /* Set {a,m}time of volatile file to that of original. */
1104 tv[0].tv_sec = hcp->stat.st_atime;
1106 tv[1].tv_sec = hcp->stat.st_mtime;
1108 if (futimes(hcp->data_fd, tv) < 0) {
1113 rc = fsync(hcp->data_fd);
1121 /* In some cases, like restore, 2 FIDs are used.
1122 * Set the right FID to use here. */
1123 if (hai->hai_action == HSMA_ARCHIVE || hai->hai_action == HSMA_RESTORE)
1124 hai->hai_fid = hai->hai_dfid;
1126 /* Fill the last missing data that will be needed by
1127 * kernel to send a hsm_progress. */
1128 hcp->copy.hc_flags = hp_flags;
1129 hcp->copy.hc_errval = abs(errval);
1131 hcp->copy.hc_hai.hai_extent = *he;
1133 rc = ioctl(hcp->ct_priv->mnt_fd, LL_IOC_HSM_COPY_END, &hcp->copy);
1139 llapi_hsm_log_ct_progress(&hcp, hai, CT_FINISH, 0, 0);
1142 if (!(hcp->data_fd < 0))
1143 close(hcp->data_fd);
1151 /** Notify a progress in processing an HSM action.
1152 * \param hdl[in,out] handle returned by llapi_hsm_action_start.
1153 * \param he[in] the range of copied data (for copy actions).
1154 * \param total[in] the expected total of copied data (for copy actions).
1155 * \param hp_flags[in] HSM progress flags.
1156 * \return 0 on success.
1158 int llapi_hsm_action_progress(struct hsm_copyaction_private *hcp,
1159 const struct hsm_extent *he, __u64 total,
1163 struct hsm_progress hp;
1164 struct hsm_action_item *hai;
1166 if (hcp == NULL || he == NULL)
1169 if (hcp->magic != CP_PRIV_MAGIC)
1172 hai = &hcp->copy.hc_hai;
1174 memset(&hp, 0, sizeof(hp));
1176 hp.hp_cookie = hai->hai_cookie;
1177 hp.hp_flags = hp_flags;
1179 /* Progress is made on the data fid */
1180 hp.hp_fid = hai->hai_dfid;
1183 rc = ioctl(hcp->ct_priv->mnt_fd, LL_IOC_HSM_PROGRESS, &hp);
1187 llapi_hsm_log_ct_progress(&hcp, hai, CT_RUNNING, total, he->length);
1192 /** Get the fid of object to be used for copying data.
1193 * @return error code if the action is not a copy operation.
1195 int llapi_hsm_action_get_dfid(const struct hsm_copyaction_private *hcp,
1198 const struct hsm_action_item *hai = &hcp->copy.hc_hai;
1200 if (hcp->magic != CP_PRIV_MAGIC)
1203 if (hai->hai_action != HSMA_RESTORE && hai->hai_action != HSMA_ARCHIVE)
1206 *fid = hai->hai_dfid;
1212 * Get a file descriptor to be used for copying data. It's up to the
1213 * caller to close the FDs obtained from this function.
1215 * @retval a file descriptor on success.
1216 * @retval a negative error code on failure.
1218 int llapi_hsm_action_get_fd(const struct hsm_copyaction_private *hcp)
1220 const struct hsm_action_item *hai = &hcp->copy.hc_hai;
1223 if (hcp->magic != CP_PRIV_MAGIC)
1226 if (hai->hai_action == HSMA_ARCHIVE) {
1227 return ct_open_by_fid(hcp->ct_priv, &hai->hai_dfid,
1228 O_RDONLY | O_NOATIME | O_NOFOLLOW | O_NONBLOCK);
1229 } else if (hai->hai_action == HSMA_RESTORE) {
1230 fd = dup(hcp->data_fd);
1231 return fd < 0 ? -errno : fd;
1238 * Import an existing hsm-archived file into Lustre.
1240 * Caller must access file by (returned) newfid value from now on.
1242 * \param dst path to Lustre destination (e.g. /mnt/lustre/my/file).
1243 * \param archive archive number.
1244 * \param st struct stat buffer containing file ownership, perm, etc.
1245 * \param stripe_* Striping options. Currently ignored, since the restore
1246 * operation will set the striping. In V2, this striping might
1248 * \param newfid[out] Filled with new Lustre fid.
1250 int llapi_hsm_import(const char *dst, int archive, const struct stat *st,
1251 unsigned long long stripe_size, int stripe_offset,
1252 int stripe_count, int stripe_pattern, char *pool_name,
1255 struct hsm_user_import hui;
1259 if (stripe_pattern == 0)
1260 stripe_pattern = LOV_PATTERN_RAID0;
1262 /* Create a non-striped file */
1263 fd = llapi_file_open_pool(dst, O_CREAT | O_WRONLY, st->st_mode,
1264 stripe_size, stripe_offset, stripe_count,
1265 stripe_pattern | LOV_PATTERN_F_RELEASED,
1268 llapi_error(LLAPI_MSG_ERROR, fd,
1269 "cannot create '%s' for import", dst);
1273 /* Get the new fid in Lustre. Caller needs to use this fid
1275 rc = llapi_fd2fid(fd, newfid);
1277 llapi_error(LLAPI_MSG_ERROR, rc,
1278 "cannot get fid of '%s' for import", dst);
1282 hui.hui_uid = st->st_uid;
1283 hui.hui_gid = st->st_gid;
1284 hui.hui_mode = st->st_mode;
1285 hui.hui_size = st->st_size;
1286 hui.hui_archive_id = archive;
1287 hui.hui_atime = st->st_atime;
1288 hui.hui_atime_ns = st->st_atim.tv_nsec;
1289 hui.hui_mtime = st->st_mtime;
1290 hui.hui_mtime_ns = st->st_mtim.tv_nsec;
1291 rc = ioctl(fd, LL_IOC_HSM_IMPORT, &hui);
1294 llapi_error(LLAPI_MSG_ERROR, rc, "cannot import '%s'", dst);
1307 * Return the current HSM states and HSM requests related to file pointed by \a
1310 * \param hus Should be allocated by caller. Will be filled with current file
1313 * \retval 0 on success.
1314 * \retval -errno on error.
1316 int llapi_hsm_state_get_fd(int fd, struct hsm_user_state *hus)
1320 rc = ioctl(fd, LL_IOC_HSM_STATE_GET, hus);
1321 /* If error, save errno value */
1322 rc = rc ? -errno : 0;
1328 * Return the current HSM states and HSM requests related to file pointed by \a
1331 * see llapi_hsm_state_get_fd() for args use and return
1333 int llapi_hsm_state_get(const char *path, struct hsm_user_state *hus)
1338 fd = open(path, O_RDONLY | O_NONBLOCK);
1342 rc = llapi_hsm_state_get_fd(fd, hus);
1349 * Set HSM states of file pointed by \a fd
1351 * Using the provided bitmasks, the current HSM states for this file will be
1352 * changed. \a archive_id could be used to change the archive number also. Set
1353 * it to 0 if you do not want to change it.
1355 * \param setmask Bitmask for flag to be set.
1356 * \param clearmask Bitmask for flag to be cleared.
1357 * \param archive_id Archive number identifier to use. 0 means no change.
1359 * \retval 0 on success.
1360 * \retval -errno on error.
1362 int llapi_hsm_state_set_fd(int fd, __u64 setmask, __u64 clearmask,
1365 struct hsm_state_set hss;
1368 hss.hss_valid = HSS_SETMASK|HSS_CLEARMASK;
1369 hss.hss_setmask = setmask;
1370 hss.hss_clearmask = clearmask;
1371 /* Change archive_id if provided. We can only change
1372 * to set something different than 0. */
1373 if (archive_id > 0) {
1374 hss.hss_valid |= HSS_ARCHIVE_ID;
1375 hss.hss_archive_id = archive_id;
1377 rc = ioctl(fd, LL_IOC_HSM_STATE_SET, &hss);
1378 /* If error, save errno value */
1379 rc = rc ? -errno : 0;
1385 * Set HSM states of file pointed by \a path.
1387 * see llapi_hsm_state_set_fd() for args use and return
1389 int llapi_hsm_state_set(const char *path, __u64 setmask, __u64 clearmask,
1395 fd = open(path, O_WRONLY | O_LOV_DELAY_CREATE | O_NONBLOCK);
1399 rc = llapi_hsm_state_set_fd(fd, setmask, clearmask, archive_id);
1406 * Return the current HSM request related to file pointed by \a path.
1408 * \param hca Should be allocated by caller. Will be filled with current file
1411 * \retval 0 on success.
1412 * \retval -errno on error.
1414 int llapi_hsm_current_action(const char *path, struct hsm_current_action *hca)
1419 fd = open(path, O_RDONLY | O_NONBLOCK);
1423 rc = ioctl(fd, LL_IOC_HSM_ACTION, hca);
1424 /* If error, save errno value */
1425 rc = rc ? -errno : 0;
1432 * Allocate a hsm_user_request with the specified carateristics.
1433 * This structure should be freed with free().
1435 * \return an allocated structure on success, NULL otherwise.
1437 struct hsm_user_request *llapi_hsm_user_request_alloc(int itemcount,
1442 len += sizeof(struct hsm_user_request);
1443 len += sizeof(struct hsm_user_item) * itemcount;
1446 return (struct hsm_user_request *)malloc(len);
1450 * Send a HSM request to Lustre, described in \param request.
1452 * \param path Fullpath to the file to operate on.
1453 * \param request The request, allocated with llapi_hsm_user_request_alloc().
1455 * \return 0 on success, an error code otherwise.
1457 int llapi_hsm_request(const char *path, const struct hsm_user_request *request)
1462 rc = get_root_path(WANT_FD, NULL, &fd, (char *)path, -1);
1466 rc = ioctl(fd, LL_IOC_HSM_REQUEST, request);
1467 /* If error, save errno value */
1468 rc = rc ? -errno : 0;