4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
36 /** \defgroup llapi llapi
43 #include <linux/lustre/lustre_user.h>
46 #define LL_MAXQUOTAS 3
50 #define ARRAY_SIZE(a) ((sizeof(a)) / (sizeof((a)[0])))
53 extern bool liblustreapi_initialized;
56 typedef void (*llapi_cb_t)(char *obd_type_name, char *obd_name, char *obd_uuid,
59 /* lustreapi message severity level */
60 enum llapi_message_level {
71 typedef void (*llapi_log_callback_t)(enum llapi_message_level level, int err,
72 const char *fmt, va_list ap);
75 /* the bottom three bits reserved for llapi_message_level */
76 #define LLAPI_MSG_MASK 0x00000007
77 #define LLAPI_MSG_NO_ERRNO 0x00000010
79 static inline const char *llapi_msg_level2str(enum llapi_message_level level)
81 static const char *levels[LLAPI_MSG_MAX] = {"OFF", "FATAL", "ERROR",
85 if (level >= LLAPI_MSG_MAX)
90 extern void llapi_msg_set_level(int level);
91 int llapi_msg_get_level(void);
92 extern llapi_log_callback_t llapi_error_callback_set(llapi_log_callback_t cb);
93 extern llapi_log_callback_t llapi_info_callback_set(llapi_log_callback_t cb);
95 void llapi_error(enum llapi_message_level level, int err, const char *fmt, ...)
96 __attribute__((__format__(__printf__, 3, 4)));
97 #define llapi_err_noerrno(level, fmt, a...) \
98 llapi_error((level) | LLAPI_MSG_NO_ERRNO, 0, fmt, ## a)
99 void llapi_printf(enum llapi_message_level level, const char *fmt, ...)
100 __attribute__((__format__(__printf__, 2, 3)));
102 struct llapi_stripe_param {
103 unsigned long long lsp_stripe_size;
105 int lsp_stripe_offset;
106 int lsp_stripe_pattern;
107 /* Number of stripes. Size of lsp_osts[] if lsp_specific is true.*/
108 int lsp_stripe_count;
109 bool lsp_is_specific;
113 extern int llapi_file_open_param(const char *name, int flags, mode_t mode,
114 const struct llapi_stripe_param *param);
115 extern int llapi_file_create(const char *name, unsigned long long stripe_size,
116 int stripe_offset, int stripe_count,
118 extern int llapi_file_open(const char *name, int flags, int mode,
119 unsigned long long stripe_size, int stripe_offset,
120 int stripe_count, int stripe_pattern);
121 extern int llapi_file_create_pool(const char *name,
122 unsigned long long stripe_size,
123 int stripe_offset, int stripe_count,
124 int stripe_pattern, char *pool_name);
125 extern int llapi_file_open_pool(const char *name, int flags, int mode,
126 unsigned long long stripe_size,
127 int stripe_offset, int stripe_count,
128 int stripe_pattern, char *pool_name);
129 extern int llapi_poollist(const char *name);
130 extern int llapi_get_poollist(const char *name, char **poollist, int list_size,
131 char *buffer, int buffer_size);
132 extern int llapi_get_poolmembers(const char *poolname, char **members,
133 int list_size, char *buffer, int buffer_size);
134 extern int llapi_file_get_stripe(const char *path, struct lov_user_md *lum);
135 extern int llapi_file_lookup(int dirfd, const char *name);
137 #define VERBOSE_COUNT 0x1
138 #define VERBOSE_SIZE 0x2
139 #define VERBOSE_OFFSET 0x4
140 #define VERBOSE_POOL 0x8
141 #define VERBOSE_DETAIL 0x10
142 #define VERBOSE_OBJID 0x20
143 #define VERBOSE_GENERATION 0x40
144 #define VERBOSE_MDTINDEX 0x80
145 #define VERBOSE_LAYOUT 0x100
146 #define VERBOSE_COMP_COUNT 0x200
147 #define VERBOSE_COMP_FLAGS 0x400
148 #define VERBOSE_COMP_START 0x800
149 #define VERBOSE_COMP_END 0x1000
150 #define VERBOSE_COMP_ID 0x2000
151 #define VERBOSE_DFID 0x4000
152 #define VERBOSE_HASH_TYPE 0x8000
153 #define VERBOSE_DEFAULT (VERBOSE_COUNT | VERBOSE_SIZE | \
154 VERBOSE_OFFSET | VERBOSE_POOL | \
155 VERBOSE_OBJID | VERBOSE_GENERATION | \
156 VERBOSE_LAYOUT | VERBOSE_HASH_TYPE | \
157 VERBOSE_COMP_COUNT | VERBOSE_COMP_FLAGS | \
158 VERBOSE_COMP_START | VERBOSE_COMP_END | \
162 unsigned int fp_max_depth;
164 mode_t fp_type; /* S_IFIFO,... */
170 /* {a,m,c}sign cannot be bitfields due to using pointers to
171 * access them during argument parsing. */
175 /* these need to be signed values */
177 fp_stripe_size_sign:2,
178 fp_stripe_count_sign:2,
179 fp_comp_start_sign:2,
181 fp_comp_count_sign:2,
183 unsigned long long fp_size;
184 unsigned long long fp_size_units;
186 unsigned long long fp_zero_end:1,
188 fp_exclude_pattern:1,
196 fp_check_pool:1, /* LOV pool name */
197 fp_check_size:1, /* file size */
203 fp_get_lmv:1, /* get MDT list from LMV */
204 fp_raw:1, /* do not fill in defaults */
205 fp_check_stripe_size:1, /* LOV stripe size */
206 fp_exclude_stripe_size:1,
207 fp_check_stripe_count:1, /* LOV stripe count */
208 fp_exclude_stripe_count:1,
211 fp_get_default_lmv:1, /* Get default LMV */
215 fp_check_comp_count:1,
216 fp_exclude_comp_count:1,
217 fp_check_comp_flags:1,
218 fp_exclude_comp_flags:1,
219 fp_check_comp_start:1,
220 fp_exclude_comp_start:1,
222 fp_exclude_comp_end:1,
224 fp_exclude_comp_id:1,
225 fp_check_mdt_count:1,
226 fp_exclude_mdt_count:1,
227 fp_check_hash_type:1,
228 fp_exclude_hash_type:1,
229 fp_yaml:1; /* output layout in YAML */
234 /* regular expression */
237 struct obd_uuid *fp_obd_uuid;
239 int fp_num_alloc_obds;
243 struct obd_uuid *fp_mdt_uuid;
245 int fp_num_alloc_mdts;
248 int fp_file_mdt_index;
251 struct lov_user_mds_data *fp_lmd;
253 char fp_poolname[LOV_MAXPOOLNAME + 1];
255 __u32 fp_lmv_stripe_count;
256 struct lmv_user_md *fp_lmv_md;
258 unsigned long long fp_stripe_size;
259 unsigned long long fp_stripe_size_units;
260 unsigned long long fp_stripe_count;
266 unsigned long long fp_comp_start;
267 unsigned long long fp_comp_start_units;
268 unsigned long long fp_comp_end;
269 unsigned long long fp_comp_end_units;
270 unsigned long long fp_mdt_count;
273 /* In-process parameters. */
274 unsigned long fp_got_uuids:1,
276 unsigned int fp_depth;
277 unsigned int fp_hash_type;
280 extern int llapi_ostlist(char *path, struct find_param *param);
281 extern int llapi_uuid_match(char *real_uuid, char *search_uuid);
282 extern int llapi_getstripe(char *path, struct find_param *param);
283 extern int llapi_find(char *path, struct find_param *param);
285 extern int llapi_file_fget_mdtidx(int fd, int *mdtidx);
286 extern int llapi_dir_set_default_lmv_stripe(const char *name, int stripe_offset,
287 int stripe_count, int stripe_pattern,
288 const char *pool_name);
289 extern int llapi_dir_create_pool(const char *name, int flags, int stripe_offset,
290 int stripe_count, int stripe_pattern,
291 const char *poolname);
292 int llapi_direntry_remove(char *dname);
294 int llapi_obd_fstatfs(int fd, __u32 type, __u32 index,
295 struct obd_statfs *stat_buf, struct obd_uuid *uuid_buf);
296 extern int llapi_obd_statfs(char *path, __u32 type, __u32 index,
297 struct obd_statfs *stat_buf,
298 struct obd_uuid *uuid_buf);
299 extern int llapi_ping(char *obd_type, char *obd_name);
300 extern int llapi_target_check(int num_types, char **obd_types, char *dir);
301 extern int llapi_file_get_lov_uuid(const char *path, struct obd_uuid *lov_uuid);
302 extern int llapi_file_get_lmv_uuid(const char *path, struct obd_uuid *lmv_uuid);
303 extern int llapi_file_fget_lov_uuid(int fd, struct obd_uuid *lov_uuid);
304 extern int llapi_lov_get_uuids(int fd, struct obd_uuid *uuidp, int *ost_count);
305 extern int llapi_lmv_get_uuids(int fd, struct obd_uuid *uuidp, int *mdt_count);
306 extern int llapi_is_lustre_mnttype(const char *type);
307 extern int llapi_search_ost(char *fsname, char *poolname, char *ostname);
308 extern int llapi_get_obd_count(char *mnt, int *count, int is_mdt);
309 extern int llapi_parse_size(const char *optarg, unsigned long long *size,
310 unsigned long long *size_units, int bytes_spec);
311 extern int llapi_search_mounts(const char *pathname, int index,
312 char *mntdir, char *fsname);
313 extern int llapi_search_fsname(const char *pathname, char *fsname);
314 extern int llapi_getname(const char *path, char *buf, size_t size);
315 extern int llapi_search_fileset(const char *pathname, char *fileset);
317 extern int llapi_search_rootpath(char *pathname, const char *fsname);
318 extern int llapi_nodemap_exists(const char *name);
319 extern int llapi_migrate_mdt(char *path, struct find_param *param);
320 extern int llapi_mv(char *path, struct find_param *param);
323 #define HAVE_LLAPI_IS_LUSTRE_MNT
324 extern int llapi_is_lustre_mnt(struct mntent *mnt);
325 extern int llapi_quotactl(char *mnt, struct if_quotactl *qctl);
326 extern int llapi_target_iterate(int type_num, char **obd_type, void *args,
328 extern int llapi_get_connect_flags(const char *mnt, __u64 *flags);
329 extern int llapi_cp(int argc, char *argv[]);
330 extern int llapi_ls(int argc, char *argv[]);
331 extern int llapi_fid2path(const char *device, const char *fidstr, char *path,
332 int pathlen, long long *recno, int *linkno);
333 extern int llapi_path2fid(const char *path, lustre_fid *fid);
334 extern int llapi_get_mdt_index_by_fid(int fd, const lustre_fid *fid,
336 extern int llapi_fd2fid(const int fd, lustre_fid *fid);
337 /* get FID of parent dir + the related name of entry in this parent dir */
338 extern int llapi_path2parent(const char *path, unsigned int linkno,
339 lustre_fid *parent_fid, char *name,
341 extern int llapi_fd2parent(int fd, unsigned int linkno,
342 lustre_fid *parent_fid, char *name,
344 extern int llapi_chomp_string(char *buf);
345 extern int llapi_open_by_fid(const char *dir, const lustre_fid *fid,
348 extern int llapi_get_version_string(char *version, unsigned int version_size);
349 /* llapi_get_version() is deprecated, use llapi_get_version_string() instead */
350 extern int llapi_get_version(char *buffer, int buffer_size, char **version)
351 __attribute__((deprecated));
352 extern int llapi_get_data_version(int fd, __u64 *data_version, __u64 flags);
353 extern int llapi_hsm_state_get_fd(int fd, struct hsm_user_state *hus);
354 extern int llapi_hsm_state_get(const char *path, struct hsm_user_state *hus);
355 extern int llapi_hsm_state_set_fd(int fd, __u64 setmask, __u64 clearmask,
357 extern int llapi_hsm_state_set(const char *path, __u64 setmask, __u64 clearmask,
359 extern int llapi_hsm_register_event_fifo(const char *path);
360 extern int llapi_hsm_unregister_event_fifo(const char *path);
361 extern void llapi_hsm_log_error(enum llapi_message_level level, int _rc,
362 const char *fmt, va_list args);
364 extern int llapi_get_agent_uuid(char *path, char *buf, size_t bufsize);
365 extern int llapi_create_volatile_idx(char *directory, int idx, int mode);
366 static inline int llapi_create_volatile(char *directory, int mode)
368 return llapi_create_volatile_idx(directory, -1, mode);
372 extern int llapi_fswap_layouts_grouplock(int fd1, int fd2, __u64 dv1, __u64 dv2,
373 int gid, __u64 flags);
374 extern int llapi_fswap_layouts(int fd1, int fd2, __u64 dv1, __u64 dv2,
376 extern int llapi_swap_layouts(const char *path1, const char *path2,
377 __u64 dv1, __u64 dv2, __u64 flags);
379 /* Changelog interface. priv is private state, managed internally by these
382 /* Records received are in extended format now, though most of them are still
383 * written in disk in changelog_rec format (to save space and time), it's
384 * converted to extended format in the lustre api to ease changelog analysis. */
385 #define HAVE_CHANGELOG_EXTEND_REC 1
387 extern int llapi_changelog_start(void **priv, enum changelog_send_flag flags,
388 const char *mdtname, long long startrec);
389 extern int llapi_changelog_fini(void **priv);
390 extern int llapi_changelog_recv(void *priv, struct changelog_rec **rech);
391 extern int llapi_changelog_free(struct changelog_rec **rech);
392 extern int llapi_changelog_get_fd(void *priv);
393 /* Allow records up to endrec to be destroyed; requires registered id. */
394 extern int llapi_changelog_clear(const char *mdtname, const char *idstr,
397 /* HSM copytool interface.
398 * priv is private state, managed internally by these functions
400 struct hsm_copytool_private;
401 struct hsm_copyaction_private;
403 extern int llapi_hsm_copytool_register(struct hsm_copytool_private **priv,
404 const char *mnt, int archive_count,
405 int *archives, int rfd_flags);
406 extern int llapi_hsm_copytool_unregister(struct hsm_copytool_private **priv);
407 extern int llapi_hsm_copytool_get_fd(struct hsm_copytool_private *ct);
408 extern int llapi_hsm_copytool_recv(struct hsm_copytool_private *priv,
409 struct hsm_action_list **hal, int *msgsize);
410 extern int llapi_hsm_action_begin(struct hsm_copyaction_private **phcp,
411 const struct hsm_copytool_private *ct,
412 const struct hsm_action_item *hai,
413 int restore_mdt_index, int restore_open_flags,
415 extern int llapi_hsm_action_end(struct hsm_copyaction_private **phcp,
416 const struct hsm_extent *he,
417 int hp_flags, int errval);
418 extern int llapi_hsm_action_progress(struct hsm_copyaction_private *hcp,
419 const struct hsm_extent *he, __u64 total,
421 extern int llapi_hsm_action_get_dfid(const struct hsm_copyaction_private *hcp,
423 extern int llapi_hsm_action_get_fd(const struct hsm_copyaction_private *hcp);
424 extern int llapi_hsm_import(const char *dst, int archive, const struct stat *st,
425 unsigned long long stripe_size, int stripe_offset,
426 int stripe_count, int stripe_pattern,
427 char *pool_name, lustre_fid *newfid);
429 /* HSM user interface */
430 extern struct hsm_user_request *llapi_hsm_user_request_alloc(int itemcount,
432 extern int llapi_hsm_request(const char *path,
433 const struct hsm_user_request *request);
434 extern int llapi_hsm_current_action(const char *path,
435 struct hsm_current_action *hca);
438 extern int llapi_json_init_list(struct llapi_json_item_list **item_list);
439 extern int llapi_json_destroy_list(struct llapi_json_item_list **item_list);
440 extern int llapi_json_add_item(struct llapi_json_item_list **item_list,
441 char *key, __u32 type, void *val);
442 extern int llapi_json_write_list(struct llapi_json_item_list **item_list,
446 extern int llapi_lease_get(int fd, int mode);
447 extern int llapi_lease_check(int fd);
448 extern int llapi_lease_put(int fd);
451 int llapi_group_lock(int fd, int gid);
452 int llapi_group_unlock(int fd, int gid);
455 int llapi_ladvise(int fd, unsigned long long flags, int num_advise,
456 struct llapi_lu_ladvise *ladvise);
459 /* llapi_layout user interface */
461 /** Opaque data type abstracting the layout of a Lustre file. */
465 * Flags to control how layouts are retrieved.
468 /* Replace non-specified values with expected inherited values. */
469 #define LAYOUT_GET_EXPECTED 0x1
472 * Return a pointer to a newly-allocated opaque data structure containing
473 * the layout for the file at \a path. The pointer should be freed with
474 * llapi_layout_free() when it is no longer needed. Failure is indicated
475 * by a NULL return value and an appropriate error code stored in errno.
477 struct llapi_layout *llapi_layout_get_by_path(const char *path, uint32_t flags);
480 * Return a pointer to a newly-allocated opaque data type containing the
481 * layout for the file referenced by open file descriptor \a fd. The
482 * pointer should be freed with llapi_layout_free() when it is no longer
483 * needed. Failure is indicated by a NULL return value and an
484 * appropriate error code stored in errno.
486 struct llapi_layout *llapi_layout_get_by_fd(int fd, uint32_t flags);
489 * Return a pointer to a newly-allocated opaque data type containing the
490 * layout for the file associated with Lustre file identifier string
491 * \a fidstr. The string \a path must name a path within the
492 * filesystem that contains the file being looked up, such as the
493 * filesystem root. The returned pointer should be freed with
494 * llapi_layout_free() when it is no longer needed. Failure is
495 * indicated with a NULL return value and an appropriate error code
498 struct llapi_layout *llapi_layout_get_by_fid(const char *path,
499 const lustre_fid *fid,
503 * Allocate a new layout. Use this when creating a new file with
504 * llapi_layout_file_create().
506 struct llapi_layout *llapi_layout_alloc(void);
509 * Free memory allocated for \a layout.
511 void llapi_layout_free(struct llapi_layout *layout);
513 /** Not a valid stripe size, offset, or RAID pattern. */
514 #define LLAPI_LAYOUT_INVALID 0x1000000000000001ULL
517 * When specified or returned as the value for stripe count,
518 * stripe size, offset, or RAID pattern, the filesystem-wide
519 * default behavior will apply.
521 #define LLAPI_LAYOUT_DEFAULT (LLAPI_LAYOUT_INVALID + 1)
524 * When specified or returned as the value for stripe count, all
525 * available OSTs will be used.
527 #define LLAPI_LAYOUT_WIDE (LLAPI_LAYOUT_INVALID + 2)
530 * When specified as the value for layout pattern, file objects will be
531 * stored using RAID0. That is, data will be split evenly and without
532 * redundancy across all OSTs in the layout.
534 #define LLAPI_LAYOUT_RAID0 0
537 * The layout includes a specific set of OSTs on which to allocate.
539 #define LLAPI_LAYOUT_SPECIFIC 0x2000000000000000ULL
542 * A valid ost index should be less than maximum valid OST index (UINT_MAX).
544 #define LLAPI_LAYOUT_IDX_MAX 0x00000000FFFFFFFFULL
547 * Flags to modify how layouts are retrieved.
549 /******************** Stripe Count ********************/
552 * Store the stripe count of \a layout in \a count.
555 * \retval -1 Error with status code in errno.
557 int llapi_layout_stripe_count_get(const struct llapi_layout *layout,
561 * Set the stripe count of \a layout to \a count.
564 * \retval -1 Invalid argument, errno set to EINVAL.
566 int llapi_layout_stripe_count_set(struct llapi_layout *layout, uint64_t count);
568 /******************** Stripe Size ********************/
571 * Store the stripe size of \a layout in \a size.
574 * \retval -1 Invalid argument, errno set to EINVAL.
576 int llapi_layout_stripe_size_get(const struct llapi_layout *layout,
580 * Set the stripe size of \a layout to \a stripe_size.
583 * \retval -1 Invalid argument, errno set to EINVAL.
585 int llapi_layout_stripe_size_set(struct llapi_layout *layout, uint64_t size);
587 /******************** Stripe Pattern ********************/
590 * Store the stripe pattern of \a layout in \a pattern.
593 * \retval -1 Error with status code in errno.
595 int llapi_layout_pattern_get(const struct llapi_layout *layout,
599 * Set the stripe pattern of \a layout to \a pattern.
602 * \retval -1 Invalid argument, errno set to EINVAL.
604 int llapi_layout_pattern_set(struct llapi_layout *layout, uint64_t pattern);
606 /******************** OST Index ********************/
609 * Store the index of the OST where stripe number \a stripe_number is stored
612 * An error return value will result from a NULL layout, if \a
613 * stripe_number is out of range, or if \a layout was not initialized
614 * with llapi_layout_lookup_by{path,fd,fid}().
617 * \retval -1 Invalid argument, errno set to EINVAL.
619 int llapi_layout_ost_index_get(const struct llapi_layout *layout,
620 uint64_t stripe_number, uint64_t *index);
623 * Set the OST index associated with stripe number \a stripe_number to
625 * NB: This is currently supported only for \a stripe_number = 0 and
626 * other usage will return ENOTSUPP in errno. A NULL \a layout or
627 * out-of-range \a stripe_number will return EINVAL in errno.
630 * \retval -1 Error with errno set to non-zero value.
632 int llapi_layout_ost_index_set(struct llapi_layout *layout, int stripe_number,
635 /******************** Pool Name ********************/
638 * Store up to \a pool_name_len characters of the name of the pool of
639 * OSTs associated with \a layout into the buffer pointed to by
642 * The correct calling form is:
644 * llapi_layout_pool_name_get(layout, pool_name, sizeof(pool_name));
646 * A pool defines a set of OSTs from which file objects may be
647 * allocated for a file using \a layout.
649 * On success, the number of bytes stored is returned, excluding the
650 * terminating '\0' character (zero indicates that \a layout does not
651 * have an associated OST pool). On error, -1 is returned and errno is
652 * set appropriately. Possible sources of error include a NULL pointer
653 * argument or insufficient space in \a dest to store the pool name,
654 * in which cases errno will be set to EINVAL.
656 * \retval 0+ The number of bytes stored in \a dest.
657 * \retval -1 Invalid argument, errno set to EINVAL.
659 int llapi_layout_pool_name_get(const struct llapi_layout *layout,
660 char *pool_name, size_t pool_name_len);
663 * Set the name of the pool of OSTs from which file objects will be
664 * allocated to \a pool_name.
666 * If the pool name uses "fsname.pool" notation to qualify the pool name
667 * with a filesystem name, the "fsname." portion will be silently
668 * discarded before storing the value. No validation that \a pool_name
669 * is an existing non-empty pool in filesystem \a fsname will be
670 * performed. Such validation can be performed by the application if
671 * desired using the llapi_search_ost() function. The maximum length of
672 * the stored value is defined by the constant LOV_MAXPOOLNAME.
675 * \retval -1 Invalid argument, errno set to EINVAL.
677 int llapi_layout_pool_name_set(struct llapi_layout *layout,
678 const char *pool_name);
680 /******************** File Creation ********************/
683 * Open an existing file at \a path, or create it with the specified
684 * \a layout and \a mode.
686 * One access mode and zero or more file creation flags and file status
687 * flags May be bitwise-or'd in \a open_flags (see open(2)). Return an
688 * open file descriptor for the file. If \a layout is non-NULL and
689 * \a path is not on a Lustre filesystem this function will fail and set
692 * An already existing file may be opened with this function, but
693 * \a layout and \a mode will not be applied to it. Callers requiring a
694 * guarantee that the opened file is created with the specified
695 * \a layout and \a mode should use llapi_layout_file_create().
697 * A NULL \a layout may be specified, in which case the standard Lustre
698 * behavior for assigning layouts to newly-created files will apply.
700 * \retval 0+ An open file descriptor.
701 * \retval -1 Error with status code in errno.
703 int llapi_layout_file_open(const char *path, int open_flags, mode_t mode,
704 const struct llapi_layout *layout);
707 * Create a new file at \a path with the specified \a layout and \a mode.
709 * One access mode and zero or more file creation flags and file status
710 * flags May be bitwise-or'd in \a open_flags (see open(2)). Return an
711 * open file descriptor for the file. If \a layout is non-NULL and
712 * \a path is not on a Lustre filesystem this function will fail and set
717 * llapi_layout_file_create(path, open_flags, mode, layout)
719 * shall be equivalent to:
721 * llapi_layout_file_open(path, open_flags|O_CREAT|O_EXCL, mode, layout)
723 * It is an error if \a path specifies an existing file.
725 * A NULL \a layout may be specified, in which the standard Lustre
726 * behavior for assigning layouts to newly-created files will apply.
728 * \retval 0+ An open file descriptor.
729 * \retval -1 Error with status code in errno.
731 int llapi_layout_file_create(const char *path, int open_flags, int mode,
732 const struct llapi_layout *layout);
735 * Fetch the start and end offset of the current layout component.
737 int llapi_layout_comp_extent_get(const struct llapi_layout *layout,
738 uint64_t *start, uint64_t *end);
740 * Set the extent of current layout component.
742 int llapi_layout_comp_extent_set(struct llapi_layout *layout,
743 uint64_t start, uint64_t end);
745 /* PFL component flags table */
746 static const struct comp_flag_name {
747 enum lov_comp_md_entry_flags cfn_flag;
748 const char *cfn_name;
749 } comp_flags_table[] = {
750 { LCME_FL_INIT, "init" },
751 /* For now, only "init" is supported
752 { LCME_FL_PRIMARY, "primary" },
753 { LCME_FL_STALE, "stale" },
754 { LCME_FL_OFFLINE, "offline" },
755 { LCME_FL_PREFERRED, "preferred" }
760 * Gets the attribute flags of the current component.
762 int llapi_layout_comp_flags_get(const struct llapi_layout *layout,
765 * Sets the specified flags of the current component leaving other flags as-is.
767 int llapi_layout_comp_flags_set(struct llapi_layout *layout, uint32_t flags);
769 * Clears the flags specified in the flags leaving other flags as-is.
771 int llapi_layout_comp_flags_clear(struct llapi_layout *layout, uint32_t flags);
773 * Fetches the file-unique component ID of the current layout component.
775 int llapi_layout_comp_id_get(const struct llapi_layout *layout, uint32_t *id);
777 * Adds one component to the existing composite or plain layout.
779 int llapi_layout_comp_add(struct llapi_layout *layout);
781 * Deletes the current layout component from the composite layout.
783 int llapi_layout_comp_del(struct llapi_layout *layout);
785 enum llapi_layout_comp_use {
786 LLAPI_LAYOUT_COMP_USE_FIRST = 1,
787 LLAPI_LAYOUT_COMP_USE_LAST = 2,
788 LLAPI_LAYOUT_COMP_USE_NEXT = 3,
789 LLAPI_LAYOUT_COMP_USE_PREV = 4,
793 * Set the currently active component to the specified component ID.
795 int llapi_layout_comp_use_id(struct llapi_layout *layout, uint32_t id);
797 * Select the currently active component at the specified position.
799 int llapi_layout_comp_use(struct llapi_layout *layout, uint32_t pos);
801 * Add layout components to an existing file.
803 int llapi_layout_file_comp_add(const char *path,
804 const struct llapi_layout *layout);
806 * Delete component(s) by the specified component id or flags.
808 int llapi_layout_file_comp_del(const char *path, uint32_t id, uint32_t flags);
810 * Change flags or other parameters of the component(s) by component ID of an
811 * existing file. The component to be modified is specified by the
812 * comp->lcme_id value, which must be an unique component ID. The new
813 * attributes are passed in by @comp and @valid is used to specify which
814 * attributes in the component are going to be changed.
816 int llapi_layout_file_comp_set(const char *path,
817 const struct llapi_layout *comp,
820 * Check if the file layout is composite.
822 bool llapi_layout_is_composite(struct llapi_layout *layout);