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) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
34 * Directory code for lustre client.
38 #include <linux/pagemap.h>
40 #include <linux/version.h>
41 #include <linux/security.h>
42 #include <linux/user_namespace.h>
43 #include <linux/uidgid.h>
44 #include <linux/uaccess.h>
45 #include <linux/buffer_head.h> // for wait_on_buffer
46 #include <linux/pagevec.h>
48 #define DEBUG_SUBSYSTEM S_LLITE
50 #include <obd_support.h>
51 #include <obd_class.h>
52 #include <uapi/linux/lustre/lustre_ioctl.h>
53 #include <lustre_lib.h>
54 #include <lustre_dlm.h>
55 #include <lustre_fid.h>
56 #include <lustre_kernelcomm.h>
57 #include <lustre_swab.h>
59 #include "llite_internal.h"
62 * (new) readdir implementation overview.
64 * Original lustre readdir implementation cached exact copy of raw directory
65 * pages on the client. These pages were indexed in client page cache by
66 * logical offset in the directory file. This design, while very simple and
67 * intuitive had some inherent problems:
69 * . it implies that byte offset to the directory entry serves as a
70 * telldir(3)/seekdir(3) cookie, but that offset is not stable: in
71 * ext3/htree directory entries may move due to splits, and more
74 * . it is incompatible with the design of split directories for cmd3,
75 * that assumes that names are distributed across nodes based on their
76 * hash, and so readdir should be done in hash order.
78 * New readdir implementation does readdir in hash order, and uses hash of a
79 * file name as a telldir/seekdir cookie. This led to number of complications:
81 * . hash is not unique, so it cannot be used to index cached directory
82 * pages on the client (note, that it requires a whole pageful of hash
83 * collided entries to cause two pages to have identical hashes);
85 * . hash is not unique, so it cannot, strictly speaking, be used as an
86 * entry cookie. ext3/htree has the same problem and lustre implementation
87 * mimics their solution: seekdir(hash) positions directory at the first
88 * entry with the given hash.
94 * Client caches directory pages using hash of the first entry as an index. As
95 * noted above hash is not unique, so this solution doesn't work as is:
96 * special processing is needed for "page hash chains" (i.e., sequences of
97 * pages filled with entries all having the same hash value).
99 * First, such chains have to be detected. To this end, server returns to the
100 * client the hash of the first entry on the page next to one returned. When
101 * client detects that this hash is the same as hash of the first entry on the
102 * returned page, page hash collision has to be handled. Pages in the
103 * hash chain, except first one, are termed "overflow pages".
105 * Solution to index uniqueness problem is to not cache overflow
106 * pages. Instead, when page hash collision is detected, all overflow pages
107 * from emerging chain are immediately requested from the server and placed in
108 * a special data structure (struct ll_dir_chain). This data structure is used
109 * by ll_readdir() to process entries from overflow pages. When readdir
110 * invocation finishes, overflow pages are discarded. If page hash collision
111 * chain weren't completely processed, next call to readdir will again detect
112 * page hash collision, again read overflow pages in, process next portion of
113 * entries and again discard the pages. This is not as wasteful as it looks,
114 * because, given reasonable hash, page hash collisions are extremely rare.
116 * 1. directory positioning
118 * When seekdir(hash) is called, original
129 * identification of and access to overflow pages
133 * Page in MDS_READPAGE RPC is packed in LU_PAGE_SIZE, and each page contains
134 * a header lu_dirpage which describes the start/end hash, and whether this
135 * page is empty (contains no dir entry) or hash collide with next page.
136 * After client receives reply, several pages will be integrated into dir page
137 * in PAGE_SIZE (if PAGE_SIZE greater than LU_PAGE_SIZE), and the
138 * lu_dirpage for this integrated page will be adjusted. See
139 * mdc_adjust_dirpages().
142 struct page *ll_get_dir_page(struct inode *dir, struct md_op_data *op_data,
143 __u64 offset, struct ll_dir_chain *chain)
145 struct md_callback cb_op;
149 cb_op.md_blocking_ast = ll_md_blocking_ast;
150 rc = md_read_page(ll_i2mdexp(dir), op_data, &cb_op, offset, &page);
157 void ll_release_page(struct inode *inode, struct page *page,
162 /* Always remove the page for striped dir, because the page is
163 * built from temporarily in LMV layer */
164 if (inode && ll_dir_striped(inode)) {
171 if (likely(page->mapping != NULL))
172 delete_from_page_cache(page);
179 * return IF_* type for given lu_dirent entry.
180 * IF_* flag shld be converted to particular OS file type in
181 * platform llite module.
183 static u16 ll_dirent_type_get(struct lu_dirent *ent)
186 struct luda_type *lt;
189 if (le32_to_cpu(ent->lde_attrs) & LUDA_TYPE) {
190 const unsigned align = sizeof(struct luda_type) - 1;
192 len = le16_to_cpu(ent->lde_namelen);
193 len = (len + align) & ~align;
194 lt = (void *)ent->lde_name + len;
195 type = IFTODT(le16_to_cpu(lt->lt_type));
201 #ifdef HAVE_DIR_CONTEXT
202 int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data,
203 struct dir_context *ctx)
206 int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data,
207 void *cookie, filldir_t filldir)
210 struct ll_sb_info *sbi = ll_i2sbi(inode);
212 bool is_api32 = ll_need_32bit_api(sbi);
213 bool is_hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
215 struct ll_dir_chain chain;
220 ll_dir_chain_init(&chain);
222 page = ll_get_dir_page(inode, op_data, pos, &chain);
224 while (rc == 0 && !done) {
225 struct lu_dirpage *dp;
226 struct lu_dirent *ent;
235 hash = MDS_DIR_END_OFF;
236 dp = page_address(page);
237 for (ent = lu_dirent_start(dp); ent != NULL && !done;
238 ent = lu_dirent_next(ent)) {
245 hash = le64_to_cpu(ent->lde_hash);
246 if (hash < pos) /* Skip until we find target hash */
249 namelen = le16_to_cpu(ent->lde_namelen);
250 if (namelen == 0) /* Skip dummy record */
253 if (is_api32 && is_hash64)
257 fid_le_to_cpu(&fid, &ent->lde_fid);
258 ino = cl_fid_build_ino(&fid, is_api32);
259 type = ll_dirent_type_get(ent);
260 /* For ll_nfs_get_name_filldir(), it will try to access
261 * 'ent' through 'lde_name', so the parameter 'name'
262 * for 'filldir()' must be part of the 'ent'. */
263 #ifdef HAVE_DIR_CONTEXT
265 done = !dir_emit(ctx, ent->lde_name, namelen, ino,
268 done = filldir(cookie, ent->lde_name, namelen, lhash,
275 ll_release_page(inode, page, false);
279 next = le64_to_cpu(dp->ldp_hash_end);
281 if (pos == MDS_DIR_END_OFF) {
283 * End of directory reached.
286 ll_release_page(inode, page, false);
289 * Normal case: continue to the next
292 ll_release_page(inode, page,
293 le32_to_cpu(dp->ldp_flags) &
296 page = ll_get_dir_page(inode, op_data, pos,
300 #ifdef HAVE_DIR_CONTEXT
305 ll_dir_chain_fini(&chain);
309 #ifdef HAVE_DIR_CONTEXT
310 static int ll_iterate(struct file *filp, struct dir_context *ctx)
312 static int ll_readdir(struct file *filp, void *cookie, filldir_t filldir)
315 struct inode *inode = file_inode(filp);
316 struct ll_file_data *lfd = filp->private_data;
317 struct ll_sb_info *sbi = ll_i2sbi(inode);
318 int hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
319 int api32 = ll_need_32bit_api(sbi);
320 struct md_op_data *op_data;
321 struct lu_fid pfid = { 0 };
322 ktime_t kstart = ktime_get();
333 "VFS Op:inode="DFID"(%p) pos/size%lu/%llu 32bit_api %d\n",
334 PFID(ll_inode2fid(inode)),
335 inode, (unsigned long)pos, i_size_read(inode), api32);
337 if (pos == MDS_DIR_END_OFF)
343 if (unlikely(ll_dir_striped(inode))) {
345 * This is only needed for striped dir to fill ..,
346 * see lmv_read_page()
348 if (file_dentry(filp)->d_parent != NULL &&
349 file_dentry(filp)->d_parent->d_inode != NULL) {
350 __u64 ibits = MDS_INODELOCK_LOOKUP;
351 struct inode *parent =
352 file_dentry(filp)->d_parent->d_inode;
354 if (ll_have_md_lock(parent, &ibits, LCK_MINMODE))
355 pfid = *ll_inode2fid(parent);
358 /* If it can not find in cache, do lookup .. on the master
360 if (fid_is_zero(&pfid)) {
361 rc = ll_dir_get_parent_fid(inode, &pfid);
367 op_data = ll_prep_md_op_data(NULL, inode, inode, NULL, 0, 0,
368 LUSTRE_OPC_ANY, inode);
370 GOTO(out, rc = PTR_ERR(op_data));
372 /* foreign dirs are browsed out of Lustre */
373 if (unlikely(op_data->op_mea1 != NULL &&
374 op_data->op_mea1->lsm_md_magic == LMV_MAGIC_FOREIGN)) {
375 ll_finish_md_op_data(op_data);
379 op_data->op_fid3 = pfid;
381 #ifdef HAVE_DIR_CONTEXT
383 rc = ll_dir_read(inode, &pos, op_data, ctx);
386 rc = ll_dir_read(inode, &pos, op_data, cookie, filldir);
391 if (pos == MDS_DIR_END_OFF) {
393 pos = LL_DIR_END_OFF_32BIT;
395 pos = LL_DIR_END_OFF;
400 #ifdef HAVE_DIR_CONTEXT
405 ll_finish_md_op_data(op_data);
409 ll_stats_ops_tally(sbi, LPROC_LL_READDIR,
410 ktime_us_delta(ktime_get(), kstart));
415 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 13, 53, 0)
416 static int ll_send_mgc_param(struct obd_export *mgc, char *string)
418 struct mgs_send_param *msp;
425 strlcpy(msp->mgs_param, string, sizeof(msp->mgs_param));
426 rc = obd_set_info_async(NULL, mgc, sizeof(KEY_SET_INFO), KEY_SET_INFO,
427 sizeof(struct mgs_send_param), msp, NULL);
429 CERROR("Failed to set parameter: %d\n", rc);
437 * Create striped directory with specified stripe(@lump)
439 * \param[in] dparent the parent of the directory.
440 * \param[in] lump the specified stripes.
441 * \param[in] dirname the name of the directory.
442 * \param[in] mode the specified mode of the directory.
444 * \retval =0 if striped directory is being created successfully.
445 * <0 if the creation is failed.
447 static int ll_dir_setdirstripe(struct dentry *dparent, struct lmv_user_md *lump,
448 size_t len, const char *dirname, umode_t mode)
450 struct inode *parent = dparent->d_inode;
451 struct ptlrpc_request *request = NULL;
452 struct md_op_data *op_data;
453 struct ll_sb_info *sbi = ll_i2sbi(parent);
454 struct inode *inode = NULL;
455 struct dentry dentry = {
459 .len = strlen(dirname),
460 .hash = ll_full_name_hash(dparent, dirname,
467 if (unlikely(!lmv_magic_supported(lump->lum_magic)))
470 if (lump->lum_magic != LMV_MAGIC_FOREIGN) {
472 "VFS Op:inode="DFID"(%p) name %s stripe_offset %d, stripe_count: %u\n",
473 PFID(ll_inode2fid(parent)), parent, dirname,
474 (int)lump->lum_stripe_offset, lump->lum_stripe_count);
476 struct lmv_foreign_md *lfm = (struct lmv_foreign_md *)lump;
479 "VFS Op:inode="DFID"(%p) name %s foreign, length %u, value '%.*s'\n",
480 PFID(ll_inode2fid(parent)), parent, dirname,
481 lfm->lfm_length, lfm->lfm_length, lfm->lfm_value);
484 if (lump->lum_stripe_count > 1 &&
485 !(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_DIR_STRIPE))
488 if (IS_DEADDIR(parent) &&
489 !OBD_FAIL_CHECK(OBD_FAIL_LLITE_NO_CHECK_DEAD))
492 if (unlikely(!lmv_magic_supported(cpu_to_le32(lump->lum_magic))))
493 lustre_swab_lmv_user_md(lump);
495 if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
496 mode &= ~current_umask();
497 mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
498 op_data = ll_prep_md_op_data(NULL, parent, NULL, dirname,
499 strlen(dirname), mode, LUSTRE_OPC_MKDIR,
502 RETURN(PTR_ERR(op_data));
504 if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
505 /* selinux_dentry_init_security() uses dentry->d_parent and name
506 * to determine the security context for the file. So our fake
507 * dentry should be real enough for this purpose. */
508 err = ll_dentry_init_security(&dentry, mode, &dentry.d_name,
509 &op_data->op_file_secctx_name,
510 &op_data->op_file_secctx,
511 &op_data->op_file_secctx_size);
513 GOTO(out_op_data, err);
516 op_data->op_cli_flags |= CLI_SET_MEA;
517 err = md_create(sbi->ll_md_exp, op_data, lump, len, mode,
518 from_kuid(&init_user_ns, current_fsuid()),
519 from_kgid(&init_user_ns, current_fsgid()),
520 cfs_curproc_cap_pack(), 0, &request);
522 GOTO(out_request, err);
524 CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_SETDIRSTRIPE_PAUSE, cfs_fail_val);
526 err = ll_prep_inode(&inode, request, parent->i_sb, NULL);
528 GOTO(out_inode, err);
530 dentry.d_inode = inode;
532 if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
534 err = security_inode_notifysecctx(inode,
535 op_data->op_file_secctx,
536 op_data->op_file_secctx_size);
539 err = ll_inode_init_security(&dentry, inode, parent);
542 GOTO(out_inode, err);
548 ptlrpc_req_finished(request);
550 ll_finish_md_op_data(op_data);
555 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
558 struct ll_sb_info *sbi = ll_i2sbi(inode);
559 struct md_op_data *op_data;
560 struct ptlrpc_request *req = NULL;
562 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 13, 53, 0)
563 struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
564 struct obd_device *mgc = lsi->lsi_mgc;
570 switch (lump->lmm_magic) {
571 case LOV_USER_MAGIC_V1:
572 lum_size = sizeof(struct lov_user_md_v1);
574 case LOV_USER_MAGIC_V3:
575 lum_size = sizeof(struct lov_user_md_v3);
577 case LOV_USER_MAGIC_COMP_V1:
578 lum_size = ((struct lov_comp_md_v1 *)lump)->lcm_size;
581 if (lump->lmm_magic != cpu_to_le32(LMV_USER_MAGIC))
582 lustre_swab_lmv_user_md(
583 (struct lmv_user_md *)lump);
584 lum_size = sizeof(struct lmv_user_md);
586 case LOV_USER_MAGIC_SPECIFIC: {
587 struct lov_user_md_v3 *v3 =
588 (struct lov_user_md_v3 *)lump;
589 if (v3->lmm_stripe_count > LOV_MAX_STRIPE_COUNT)
591 lum_size = lov_user_md_size(v3->lmm_stripe_count,
592 LOV_USER_MAGIC_SPECIFIC);
596 CDEBUG(D_IOCTL, "bad userland LOV MAGIC:"
597 " %#08x != %#08x nor %#08x\n",
598 lump->lmm_magic, LOV_USER_MAGIC_V1,
604 * This is coming from userspace, so should be in
605 * local endian. But the MDS would like it in little
606 * endian, so we swab it before we send it.
608 if ((__swab32(lump->lmm_magic) & le32_to_cpu(LOV_MAGIC_MASK)) ==
609 le32_to_cpu(LOV_MAGIC_MAGIC))
610 lustre_swab_lov_user_md(lump, 0);
612 lum_size = sizeof(struct lov_user_md_v1);
615 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
616 LUSTRE_OPC_ANY, NULL);
618 RETURN(PTR_ERR(op_data));
620 /* swabbing is done in lov_setstripe() on server side */
621 rc = md_setattr(sbi->ll_md_exp, op_data, lump, lum_size, &req);
622 ll_finish_md_op_data(op_data);
623 ptlrpc_req_finished(req);
627 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 13, 53, 0)
629 * 2.9 server has stored filesystem default stripe in ROOT xattr,
630 * and it's stored into system config for backward compatibility.
632 * In the following we use the fact that LOV_USER_MAGIC_V1 and
633 * LOV_USER_MAGIC_V3 have the same initial fields so we do not
634 * need the make the distiction between the 2 versions
636 if (set_default && mgc->u.cli.cl_mgc_mgsexp &&
638 le32_to_cpu(lump->lmm_magic) == LOV_USER_MAGIC_V1 ||
639 le32_to_cpu(lump->lmm_magic) == LOV_USER_MAGIC_V3)) {
643 OBD_ALLOC(param, MGS_PARAM_MAXLEN);
645 GOTO(end, rc = -ENOMEM);
648 /* Get fsname and assume devname to be -MDT0000. */
649 snprintf(buf, MGS_PARAM_MAXLEN, "%s-MDT0000.lov",
653 /* Set root stripesize */
654 snprintf(buf, MGS_PARAM_MAXLEN, ".stripesize=%u",
655 lump ? le32_to_cpu(lump->lmm_stripe_size) : 0);
656 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
660 /* Set root stripecount */
661 snprintf(buf, MGS_PARAM_MAXLEN, ".stripecount=%hd",
662 lump ? le16_to_cpu(lump->lmm_stripe_count) : 0);
663 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
667 /* Set root stripeoffset */
668 snprintf(buf, MGS_PARAM_MAXLEN, ".stripeoffset=%hd",
669 lump ? le16_to_cpu(lump->lmm_stripe_offset) :
670 (typeof(lump->lmm_stripe_offset))(-1));
671 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
675 OBD_FREE(param, MGS_PARAM_MAXLEN);
681 static int ll_dir_get_default_layout(struct inode *inode, void **plmm,
683 struct ptlrpc_request **request, u64 valid,
684 enum get_default_layout_type type)
686 struct ll_sb_info *sbi = ll_i2sbi(inode);
687 struct mdt_body *body;
688 struct lov_mds_md *lmm = NULL;
689 struct ptlrpc_request *req = NULL;
691 struct md_op_data *op_data;
695 rc = ll_get_default_mdsize(sbi, &lmm_size);
699 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
700 0, lmm_size, LUSTRE_OPC_ANY,
703 RETURN(PTR_ERR(op_data));
705 op_data->op_valid = valid | OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
707 if (type == GET_DEFAULT_LAYOUT_ROOT) {
708 lu_root_fid(&op_data->op_fid1);
709 fid = op_data->op_fid1;
711 fid = *ll_inode2fid(inode);
714 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
715 ll_finish_md_op_data(op_data);
717 CDEBUG(D_INFO, "md_getattr failed on inode "DFID": rc %d\n",
722 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
723 LASSERT(body != NULL);
725 lmm_size = body->mbo_eadatasize;
727 if (!(body->mbo_valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
729 GOTO(out, rc = -ENODATA);
732 lmm = req_capsule_server_sized_get(&req->rq_pill,
733 &RMF_MDT_MD, lmm_size);
734 LASSERT(lmm != NULL);
737 * This is coming from the MDS, so is probably in
738 * little endian. We convert it to host endian before
739 * passing it to userspace.
741 /* We don't swab objects for directories */
742 switch (le32_to_cpu(lmm->lmm_magic)) {
745 case LOV_MAGIC_COMP_V1:
746 case LOV_USER_MAGIC_SPECIFIC:
747 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
748 lustre_swab_lov_user_md((struct lov_user_md *)lmm, 0);
751 if (LMV_MAGIC != cpu_to_le32(LMV_MAGIC))
752 lustre_swab_lmv_mds_md((union lmv_mds_md *)lmm);
755 if (LMV_USER_MAGIC != cpu_to_le32(LMV_USER_MAGIC))
756 lustre_swab_lmv_user_md((struct lmv_user_md *)lmm);
758 case LMV_MAGIC_FOREIGN: {
759 struct lmv_foreign_md *lfm = (struct lmv_foreign_md *)lmm;
761 if (LMV_MAGIC_FOREIGN != cpu_to_le32(LMV_MAGIC_FOREIGN)) {
762 __swab32s(&lfm->lfm_magic);
763 __swab32s(&lfm->lfm_length);
764 __swab32s(&lfm->lfm_type);
765 __swab32s(&lfm->lfm_flags);
770 CERROR("unknown magic: %lX\n", (unsigned long)lmm->lmm_magic);
775 *plmm_size = lmm_size;
781 * This function will be used to get default LOV/LMV/Default LMV
782 * @valid will be used to indicate which stripe it will retrieve.
783 * If the directory does not have its own default layout, then the
784 * function will request the default layout from root FID.
785 * OBD_MD_MEA LMV stripe EA
786 * OBD_MD_DEFAULT_MEA Default LMV stripe EA
787 * otherwise Default LOV EA.
788 * Each time, it can only retrieve 1 stripe EA
790 int ll_dir_getstripe_default(struct inode *inode, void **plmm, int *plmm_size,
791 struct ptlrpc_request **request,
792 struct ptlrpc_request **root_request,
795 struct ptlrpc_request *req = NULL;
796 struct ptlrpc_request *root_req = NULL;
797 struct lov_mds_md *lmm = NULL;
802 rc = ll_dir_get_default_layout(inode, (void **)&lmm, &lmm_size,
804 if (rc == -ENODATA && !fid_is_root(ll_inode2fid(inode)) &&
805 !(valid & (OBD_MD_MEA|OBD_MD_DEFAULT_MEA)) && root_request != NULL)
806 rc = ll_dir_get_default_layout(inode, (void **)&lmm, &lmm_size,
808 GET_DEFAULT_LAYOUT_ROOT);
811 *plmm_size = lmm_size;
813 if (root_request != NULL)
814 *root_request = root_req;
820 * This function will be used to get default LOV/LMV/Default LMV
821 * @valid will be used to indicate which stripe it will retrieve
822 * OBD_MD_MEA LMV stripe EA
823 * OBD_MD_DEFAULT_MEA Default LMV stripe EA
824 * otherwise Default LOV EA.
825 * Each time, it can only retrieve 1 stripe EA
827 int ll_dir_getstripe(struct inode *inode, void **plmm, int *plmm_size,
828 struct ptlrpc_request **request, u64 valid)
830 struct ptlrpc_request *req = NULL;
831 struct lov_mds_md *lmm = NULL;
836 rc = ll_dir_get_default_layout(inode, (void **)&lmm, &lmm_size,
840 *plmm_size = lmm_size;
846 int ll_get_mdt_idx_by_fid(struct ll_sb_info *sbi, const struct lu_fid *fid)
848 struct md_op_data *op_data;
853 OBD_ALLOC_PTR(op_data);
857 op_data->op_flags |= MF_GET_MDT_IDX;
858 op_data->op_fid1 = *fid;
859 rc = md_getattr(sbi->ll_md_exp, op_data, NULL);
860 mdt_index = op_data->op_mds;
861 OBD_FREE_PTR(op_data);
869 * Get MDT index for the inode.
871 int ll_get_mdt_idx(struct inode *inode)
873 return ll_get_mdt_idx_by_fid(ll_i2sbi(inode), ll_inode2fid(inode));
877 * Generic handler to do any pre-copy work.
879 * It sends a first hsm_progress (with extent length == 0) to coordinator as a
880 * first information for it that real work has started.
882 * Moreover, for a ARCHIVE request, it will sample the file data version and
883 * store it in \a copy.
885 * \return 0 on success.
887 static int ll_ioc_copy_start(struct super_block *sb, struct hsm_copy *copy)
889 struct ll_sb_info *sbi = ll_s2sbi(sb);
890 struct hsm_progress_kernel hpk;
895 /* Forge a hsm_progress based on data from copy. */
896 hpk.hpk_fid = copy->hc_hai.hai_fid;
897 hpk.hpk_cookie = copy->hc_hai.hai_cookie;
898 hpk.hpk_extent.offset = copy->hc_hai.hai_extent.offset;
899 hpk.hpk_extent.length = 0;
902 hpk.hpk_data_version = 0;
905 /* For archive request, we need to read the current file version. */
906 if (copy->hc_hai.hai_action == HSMA_ARCHIVE) {
908 __u64 data_version = 0;
910 /* Get inode for this fid */
911 inode = search_inode_for_lustre(sb, ©->hc_hai.hai_fid);
913 hpk.hpk_flags |= HP_FLAG_RETRY;
914 /* hpk_errval is >= 0 */
915 hpk.hpk_errval = -PTR_ERR(inode);
916 GOTO(progress, rc = PTR_ERR(inode));
919 /* Read current file data version */
920 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
923 CDEBUG(D_HSM, "Could not read file data version of "
924 DFID" (rc = %d). Archive request ("
925 "%#llx) could not be done.\n",
926 PFID(©->hc_hai.hai_fid), rc,
927 copy->hc_hai.hai_cookie);
928 hpk.hpk_flags |= HP_FLAG_RETRY;
929 /* hpk_errval must be >= 0 */
930 hpk.hpk_errval = -rc;
934 /* Store in the hsm_copy for later copytool use.
935 * Always modified even if no lsm. */
936 copy->hc_data_version = data_version;
940 /* On error, the request should be considered as completed */
941 if (hpk.hpk_errval > 0)
942 hpk.hpk_flags |= HP_FLAG_COMPLETED;
944 rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
947 /* Return first error */
948 RETURN(rc != 0 ? rc : rc2);
952 * Generic handler to do any post-copy work.
954 * It will send the last hsm_progress update to coordinator to inform it
955 * that copy is finished and whether it was successful or not.
958 * - for ARCHIVE request, it will sample the file data version and compare it
959 * with the version saved in ll_ioc_copy_start(). If they do not match, copy
960 * will be considered as failed.
961 * - for RESTORE request, it will sample the file data version and send it to
962 * coordinator which is useful if the file was imported as 'released'.
964 * \return 0 on success.
966 static int ll_ioc_copy_end(struct super_block *sb, struct hsm_copy *copy)
968 struct ll_sb_info *sbi = ll_s2sbi(sb);
969 struct hsm_progress_kernel hpk;
974 /* If you modify the logic here, also check llapi_hsm_copy_end(). */
975 /* Take care: copy->hc_hai.hai_action, len, gid and data are not
976 * initialized if copy_end was called with copy == NULL.
979 /* Forge a hsm_progress based on data from copy. */
980 hpk.hpk_fid = copy->hc_hai.hai_fid;
981 hpk.hpk_cookie = copy->hc_hai.hai_cookie;
982 hpk.hpk_extent = copy->hc_hai.hai_extent;
983 hpk.hpk_flags = copy->hc_flags | HP_FLAG_COMPLETED;
984 hpk.hpk_errval = copy->hc_errval;
985 hpk.hpk_data_version = 0;
987 /* For archive request, we need to check the file data was not changed.
989 * For restore request, we need to send the file data version, this is
990 * useful when the file was created using hsm_import.
992 if (((copy->hc_hai.hai_action == HSMA_ARCHIVE) ||
993 (copy->hc_hai.hai_action == HSMA_RESTORE)) &&
994 (copy->hc_errval == 0)) {
996 __u64 data_version = 0;
998 /* Get lsm for this fid */
999 inode = search_inode_for_lustre(sb, ©->hc_hai.hai_fid);
1000 if (IS_ERR(inode)) {
1001 hpk.hpk_flags |= HP_FLAG_RETRY;
1002 /* hpk_errval must be >= 0 */
1003 hpk.hpk_errval = -PTR_ERR(inode);
1004 GOTO(progress, rc = PTR_ERR(inode));
1007 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
1010 CDEBUG(D_HSM, "Could not read file data version. "
1011 "Request could not be confirmed.\n");
1012 if (hpk.hpk_errval == 0)
1013 hpk.hpk_errval = -rc;
1017 /* Store in the hsm_copy for later copytool use.
1018 * Always modified even if no lsm. */
1019 hpk.hpk_data_version = data_version;
1021 /* File could have been stripped during archiving, so we need
1022 * to check anyway. */
1023 if ((copy->hc_hai.hai_action == HSMA_ARCHIVE) &&
1024 (copy->hc_data_version != data_version)) {
1025 CDEBUG(D_HSM, "File data version mismatched. "
1026 "File content was changed during archiving. "
1027 DFID", start:%#llx current:%#llx\n",
1028 PFID(©->hc_hai.hai_fid),
1029 copy->hc_data_version, data_version);
1030 /* File was changed, send error to cdt. Do not ask for
1031 * retry because if a file is modified frequently,
1032 * the cdt will loop on retried archive requests.
1033 * The policy engine will ask for a new archive later
1034 * when the file will not be modified for some tunable
1036 hpk.hpk_flags &= ~HP_FLAG_RETRY;
1038 /* hpk_errval must be >= 0 */
1039 hpk.hpk_errval = -rc;
1046 rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
1049 /* Return first error */
1050 RETURN(rc != 0 ? rc : rc2);
1054 static int copy_and_ct_start(int cmd, struct obd_export *exp,
1055 const struct lustre_kernelcomm __user *data)
1057 struct lustre_kernelcomm *lk;
1058 struct lustre_kernelcomm *tmp;
1059 size_t size = sizeof(*lk);
1064 /* copy data from userspace to get numbers of archive_id */
1065 OBD_ALLOC(lk, size);
1069 if (copy_from_user(lk, data, size))
1070 GOTO(out_lk, rc = -EFAULT);
1072 if (lk->lk_flags & LK_FLG_STOP)
1075 if (!(lk->lk_flags & LK_FLG_DATANR)) {
1076 __u32 archive_mask = lk->lk_data_count;
1079 /* old hsm agent to old MDS */
1080 if (!exp_connect_archive_id_array(exp))
1083 /* old hsm agent to new MDS */
1084 lk->lk_flags |= LK_FLG_DATANR;
1086 if (archive_mask == 0)
1089 count = hweight32(archive_mask);
1090 new_size = offsetof(struct lustre_kernelcomm, lk_data[count]);
1091 OBD_ALLOC(tmp, new_size);
1093 GOTO(out_lk, rc = -ENOMEM);
1095 memcpy(tmp, lk, size);
1096 tmp->lk_data_count = count;
1102 for (i = 0; i < sizeof(archive_mask) * 8; i++) {
1103 if ((1 << i) & archive_mask) {
1104 lk->lk_data[count] = i + 1;
1111 /* new hsm agent to new mds */
1112 if (lk->lk_data_count > 0) {
1113 new_size = offsetof(struct lustre_kernelcomm,
1114 lk_data[lk->lk_data_count]);
1115 OBD_ALLOC(tmp, new_size);
1117 GOTO(out_lk, rc = -ENOMEM);
1123 if (copy_from_user(lk, data, size))
1124 GOTO(out_lk, rc = -EFAULT);
1127 /* new hsm agent to old MDS */
1128 if (!exp_connect_archive_id_array(exp)) {
1131 if (lk->lk_data_count > LL_HSM_ORIGIN_MAX_ARCHIVE)
1132 GOTO(out_lk, rc = -EINVAL);
1134 for (i = 0; i < lk->lk_data_count; i++) {
1135 if (lk->lk_data[i] > LL_HSM_ORIGIN_MAX_ARCHIVE) {
1137 CERROR("%s: archive id %d requested but only "
1138 "[0 - %zu] supported: rc = %d\n",
1139 exp->exp_obd->obd_name, lk->lk_data[i],
1140 LL_HSM_ORIGIN_MAX_ARCHIVE, rc);
1144 if (lk->lk_data[i] == 0) {
1149 archives |= (1 << (lk->lk_data[i] - 1));
1151 lk->lk_flags &= ~LK_FLG_DATANR;
1152 lk->lk_data_count = archives;
1155 rc = obd_iocontrol(cmd, exp, size, lk, NULL);
1161 static int check_owner(int type, int id)
1165 if (!uid_eq(current_euid(), make_kuid(&init_user_ns, id)))
1169 if (!in_egroup_p(make_kgid(&init_user_ns, id)))
1178 static int quotactl_ioctl(struct ll_sb_info *sbi, struct if_quotactl *qctl)
1180 int cmd = qctl->qc_cmd;
1181 int type = qctl->qc_type;
1182 int id = qctl->qc_id;
1183 int valid = qctl->qc_valid;
1190 case LUSTRE_Q_SETDEFAULT:
1191 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1195 case LUSTRE_Q_GETDEFAULT:
1196 if (check_owner(type, id) &&
1197 (!cfs_capable(CFS_CAP_SYS_ADMIN)))
1203 CERROR("unsupported quotactl op: %#x\n", cmd);
1207 if (valid != QC_GENERAL) {
1208 if (cmd == Q_GETINFO)
1209 qctl->qc_cmd = Q_GETOINFO;
1210 else if (cmd == Q_GETQUOTA)
1211 qctl->qc_cmd = Q_GETOQUOTA;
1217 rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1218 sizeof(*qctl), qctl, NULL);
1221 rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_dt_exp,
1222 sizeof(*qctl), qctl, NULL);
1225 rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1226 sizeof(*qctl), qctl, NULL);
1228 rc = obd_iocontrol(OBD_IOC_QUOTACTL,
1230 sizeof(*qctl), qctl, NULL);
1242 struct obd_quotactl *oqctl;
1244 OBD_ALLOC_PTR(oqctl);
1248 QCTL_COPY(oqctl, qctl);
1249 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1251 OBD_FREE_PTR(oqctl);
1254 /* If QIF_SPACE is not set, client should collect the
1255 * space usage from OSSs by itself */
1256 if (cmd == Q_GETQUOTA &&
1257 !(oqctl->qc_dqblk.dqb_valid & QIF_SPACE) &&
1258 !oqctl->qc_dqblk.dqb_curspace) {
1259 struct obd_quotactl *oqctl_tmp;
1261 OBD_ALLOC_PTR(oqctl_tmp);
1262 if (oqctl_tmp == NULL)
1263 GOTO(out, rc = -ENOMEM);
1265 oqctl_tmp->qc_cmd = Q_GETOQUOTA;
1266 oqctl_tmp->qc_id = oqctl->qc_id;
1267 oqctl_tmp->qc_type = oqctl->qc_type;
1269 /* collect space usage from OSTs */
1270 oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1271 rc = obd_quotactl(sbi->ll_dt_exp, oqctl_tmp);
1272 if (!rc || rc == -EREMOTEIO) {
1273 oqctl->qc_dqblk.dqb_curspace =
1274 oqctl_tmp->qc_dqblk.dqb_curspace;
1275 oqctl->qc_dqblk.dqb_valid |= QIF_SPACE;
1278 /* collect space & inode usage from MDTs */
1279 oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1280 oqctl_tmp->qc_dqblk.dqb_curinodes = 0;
1281 rc = obd_quotactl(sbi->ll_md_exp, oqctl_tmp);
1282 if (!rc || rc == -EREMOTEIO) {
1283 oqctl->qc_dqblk.dqb_curspace +=
1284 oqctl_tmp->qc_dqblk.dqb_curspace;
1285 oqctl->qc_dqblk.dqb_curinodes =
1286 oqctl_tmp->qc_dqblk.dqb_curinodes;
1287 oqctl->qc_dqblk.dqb_valid |= QIF_INODES;
1289 oqctl->qc_dqblk.dqb_valid &= ~QIF_SPACE;
1292 OBD_FREE_PTR(oqctl_tmp);
1295 QCTL_COPY(qctl, oqctl);
1296 OBD_FREE_PTR(oqctl);
1302 int ll_rmfid(struct file *file, void __user *arg)
1304 const struct fid_array __user *ufa = arg;
1305 struct fid_array *lfa = NULL;
1308 int i, rc, *rcs = NULL;
1311 if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
1312 !(ll_i2sbi(file_inode(file))->ll_flags & LL_SBI_USER_FID2PATH))
1314 /* Only need to get the buflen */
1315 if (get_user(nr, &ufa->fa_nr))
1317 /* DoS protection */
1318 if (nr > OBD_MAX_FIDS_IN_ARRAY)
1321 size = offsetof(struct fid_array, fa_fids[nr]);
1322 OBD_ALLOC(lfa, size);
1325 OBD_ALLOC(rcs, sizeof(int) * nr);
1327 GOTO(free_lfa, rc = -ENOMEM);
1329 if (copy_from_user(lfa, arg, size))
1330 GOTO(free_rcs, rc = -EFAULT);
1332 /* Call mdc_iocontrol */
1333 rc = md_rmfid(ll_i2mdexp(file_inode(file)), lfa, rcs, NULL);
1335 for (i = 0; i < nr; i++)
1337 lfa->fa_fids[i].f_ver = rcs[i];
1338 if (copy_to_user(arg, lfa, size))
1343 OBD_FREE(rcs, sizeof(int) * nr);
1345 OBD_FREE(lfa, size);
1350 /* This function tries to get a single name component,
1351 * to send to the server. No actual path traversal involved,
1352 * so we limit to NAME_MAX */
1353 static char *ll_getname(const char __user *filename)
1358 OBD_ALLOC(tmp, NAME_MAX + 1);
1361 return ERR_PTR(-ENOMEM);
1363 len = strncpy_from_user(tmp, filename, NAME_MAX + 1);
1366 else if (len > NAME_MAX)
1367 ret = -ENAMETOOLONG;
1370 OBD_FREE(tmp, NAME_MAX + 1);
1376 #define ll_putname(filename) OBD_FREE(filename, NAME_MAX + 1);
1378 static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1380 struct dentry *dentry = file_dentry(file);
1381 struct inode *inode = file_inode(file);
1382 struct ll_sb_info *sbi = ll_i2sbi(inode);
1383 struct obd_ioctl_data *data;
1387 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), cmd=%#x\n",
1388 PFID(ll_inode2fid(inode)), inode, cmd);
1390 /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
1391 if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
1394 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
1396 case FS_IOC_GETFLAGS:
1397 case FS_IOC_SETFLAGS:
1398 RETURN(ll_iocontrol(inode, file, cmd, arg));
1399 case FSFILT_IOC_GETVERSION:
1400 case FS_IOC_GETVERSION:
1401 RETURN(put_user(inode->i_generation, (int __user *)arg));
1402 /* We need to special case any other ioctls we want to handle,
1403 * to send them to the MDS/OST as appropriate and to properly
1404 * network encode the arg field. */
1405 case FS_IOC_SETVERSION:
1408 case LL_IOC_GET_MDTIDX: {
1411 mdtidx = ll_get_mdt_idx(inode);
1415 if (put_user((int)mdtidx, (int __user *)arg))
1420 case IOC_MDC_LOOKUP: {
1421 int namelen, len = 0;
1425 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1430 filename = data->ioc_inlbuf1;
1431 namelen = strlen(filename);
1433 CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1434 GOTO(out_free, rc = -EINVAL);
1437 rc = ll_get_fid_by_name(inode, filename, namelen, NULL, NULL);
1439 CERROR("%s: lookup %.*s failed: rc = %d\n",
1440 sbi->ll_fsname, namelen, filename, rc);
1444 OBD_FREE_LARGE(buf, len);
1447 case LL_IOC_LMV_SETSTRIPE: {
1448 struct lmv_user_md *lum;
1457 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1462 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
1463 data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
1464 GOTO(lmv_out_free, rc = -EINVAL);
1466 filename = data->ioc_inlbuf1;
1467 namelen = data->ioc_inllen1;
1470 CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1471 GOTO(lmv_out_free, rc = -EINVAL);
1473 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
1474 lumlen = data->ioc_inllen2;
1476 if (!lmv_magic_supported(lum->lum_magic)) {
1477 CERROR("%s: wrong lum magic %x : rc = %d\n", filename,
1478 lum->lum_magic, -EINVAL);
1479 GOTO(lmv_out_free, rc = -EINVAL);
1482 if ((lum->lum_magic == LMV_USER_MAGIC ||
1483 lum->lum_magic == LMV_USER_MAGIC_SPECIFIC) &&
1484 lumlen < sizeof(*lum)) {
1485 CERROR("%s: wrong lum size %d for magic %x : rc = %d\n",
1486 filename, lumlen, lum->lum_magic, -EINVAL);
1487 GOTO(lmv_out_free, rc = -EINVAL);
1490 if (lum->lum_magic == LMV_MAGIC_FOREIGN &&
1491 lumlen < sizeof(struct lmv_foreign_md)) {
1492 CERROR("%s: wrong lum magic %x or size %d: rc = %d\n",
1493 filename, lum->lum_magic, lumlen, -EFAULT);
1494 GOTO(lmv_out_free, rc = -EINVAL);
1497 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 9, 50, 0)
1498 mode = data->ioc_type != 0 ? data->ioc_type : S_IRWXUGO;
1500 mode = data->ioc_type;
1502 rc = ll_dir_setdirstripe(dentry, lum, lumlen, filename, mode);
1504 OBD_FREE_LARGE(buf, len);
1508 case LL_IOC_LMV_SET_DEFAULT_STRIPE: {
1509 struct lmv_user_md lum;
1510 struct lmv_user_md __user *ulump =
1511 (struct lmv_user_md __user *)arg;
1514 if (copy_from_user(&lum, ulump, sizeof(lum)))
1517 if (lum.lum_magic != LMV_USER_MAGIC)
1520 rc = ll_dir_setstripe(inode, (struct lov_user_md *)&lum, 0);
1524 case LL_IOC_LOV_SETSTRIPE_NEW:
1525 case LL_IOC_LOV_SETSTRIPE: {
1526 struct lov_user_md_v3 *lumv3 = NULL;
1527 struct lov_user_md_v1 lumv1;
1528 struct lov_user_md_v1 *lumv1_ptr = &lumv1;
1529 struct lov_user_md_v1 __user *lumv1p =
1530 (struct lov_user_md_v1 __user *)arg;
1531 struct lov_user_md_v3 __user *lumv3p =
1532 (struct lov_user_md_v3 __user *)arg;
1535 int set_default = 0;
1537 BUILD_BUG_ON(sizeof(struct lov_user_md_v3) <=
1538 sizeof(struct lov_comp_md_v1));
1539 BUILD_BUG_ON(sizeof(*lumv3) != sizeof(*lumv3p));
1540 /* first try with v1 which is smaller than v3 */
1541 if (copy_from_user(&lumv1, lumv1p, sizeof(lumv1)))
1544 if (inode->i_sb->s_root == file_dentry(file))
1547 switch (lumv1.lmm_magic) {
1548 case LOV_USER_MAGIC_V3:
1549 case LOV_USER_MAGIC_SPECIFIC:
1550 lum_size = ll_lov_user_md_size(&lumv1);
1553 OBD_ALLOC(lumv3, lum_size);
1556 if (copy_from_user(lumv3, lumv3p, lum_size))
1557 GOTO(out, rc = -EFAULT);
1558 lumv1_ptr = (struct lov_user_md_v1 *)lumv3;
1560 case LOV_USER_MAGIC_V1:
1563 GOTO(out, rc = -ENOTSUPP);
1566 /* in v1 and v3 cases lumv1 points to data */
1567 rc = ll_dir_setstripe(inode, lumv1_ptr, set_default);
1570 OBD_FREE(lumv3, lum_size);
1573 case LL_IOC_LMV_GETSTRIPE: {
1574 struct lmv_user_md __user *ulmv =
1575 (struct lmv_user_md __user *)arg;
1576 struct lmv_user_md lum;
1577 struct ptlrpc_request *request = NULL;
1578 struct ptlrpc_request *root_request = NULL;
1579 union lmv_mds_md *lmm = NULL;
1582 struct lmv_user_md *tmp = NULL;
1586 int max_stripe_count;
1590 if (copy_from_user(&lum, ulmv, sizeof(*ulmv)))
1593 max_stripe_count = lum.lum_stripe_count;
1594 /* lum_magic will indicate which stripe the ioctl will like
1595 * to get, LMV_MAGIC_V1 is for normal LMV stripe, LMV_USER_MAGIC
1596 * is for default LMV stripe */
1597 if (lum.lum_magic == LMV_MAGIC_V1)
1598 valid |= OBD_MD_MEA;
1599 else if (lum.lum_magic == LMV_USER_MAGIC)
1600 valid |= OBD_MD_DEFAULT_MEA;
1604 rc = ll_dir_getstripe_default(inode, (void **)&lmm, &lmmsize,
1605 &request, &root_request, valid);
1607 GOTO(finish_req, rc);
1609 /* Get default LMV EA */
1610 if (lum.lum_magic == LMV_USER_MAGIC) {
1611 if (lmmsize > sizeof(*ulmv))
1612 GOTO(finish_req, rc = -EINVAL);
1614 if (copy_to_user(ulmv, lmm, lmmsize))
1615 GOTO(finish_req, rc = -EFAULT);
1617 GOTO(finish_req, rc);
1620 /* if foreign LMV case, fake stripes number */
1621 if (lmm->lmv_magic == LMV_MAGIC_FOREIGN) {
1622 struct lmv_foreign_md *lfm;
1624 lfm = (struct lmv_foreign_md *)lmm;
1625 if (lfm->lfm_length < XATTR_SIZE_MAX -
1626 offsetof(typeof(*lfm), lfm_value)) {
1627 __u32 size = lfm->lfm_length +
1628 offsetof(typeof(*lfm), lfm_value);
1630 stripe_count = lmv_foreign_to_md_stripes(size);
1632 CERROR("invalid %d foreign size returned\n",
1637 stripe_count = lmv_mds_md_stripe_count_get(lmm);
1639 if (max_stripe_count < stripe_count) {
1640 lum.lum_stripe_count = stripe_count;
1641 if (copy_to_user(ulmv, &lum, sizeof(lum)))
1642 GOTO(finish_req, rc = -EFAULT);
1643 GOTO(finish_req, rc = -E2BIG);
1646 /* enough room on user side and foreign case */
1647 if (lmm->lmv_magic == LMV_MAGIC_FOREIGN) {
1648 struct lmv_foreign_md *lfm;
1651 lfm = (struct lmv_foreign_md *)lmm;
1652 size = lfm->lfm_length +
1653 offsetof(struct lmv_foreign_md, lfm_value);
1654 if (copy_to_user(ulmv, lfm, size))
1655 GOTO(finish_req, rc = -EFAULT);
1656 GOTO(finish_req, rc);
1659 lum_size = lmv_user_md_size(stripe_count,
1660 LMV_USER_MAGIC_SPECIFIC);
1661 OBD_ALLOC(tmp, lum_size);
1663 GOTO(finish_req, rc = -ENOMEM);
1665 mdt_index = ll_get_mdt_idx(inode);
1667 GOTO(out_tmp, rc = -ENOMEM);
1669 tmp->lum_magic = LMV_MAGIC_V1;
1670 tmp->lum_stripe_count = 0;
1671 tmp->lum_stripe_offset = mdt_index;
1672 tmp->lum_hash_type = lmv_mds_md_hash_type_get(lmm);
1673 for (i = 0; i < stripe_count; i++) {
1676 fid_le_to_cpu(&fid, &lmm->lmv_md_v1.lmv_stripe_fids[i]);
1677 if (fid_is_sane(&fid)) {
1678 mdt_index = ll_get_mdt_idx_by_fid(sbi, &fid);
1680 GOTO(out_tmp, rc = mdt_index);
1682 tmp->lum_objects[i].lum_mds = mdt_index;
1683 tmp->lum_objects[i].lum_fid = fid;
1686 tmp->lum_stripe_count++;
1689 if (copy_to_user(ulmv, tmp, lum_size))
1690 GOTO(out_tmp, rc = -EFAULT);
1692 OBD_FREE(tmp, lum_size);
1694 ptlrpc_req_finished(request);
1695 ptlrpc_req_finished(root_request);
1699 case LL_IOC_REMOVE_ENTRY: {
1700 char *filename = NULL;
1704 /* Here is a little hack to avoid sending REINT_RMENTRY to
1705 * unsupported server, which might crash the server(LU-2730),
1706 * Because both LVB_TYPE and REINT_RMENTRY will be supported
1707 * on 2.4, we use OBD_CONNECT_LVB_TYPE to detect whether the
1708 * server will support REINT_RMENTRY XXX*/
1709 if (!(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_LVB_TYPE))
1712 filename = ll_getname((const char __user *)arg);
1713 if (IS_ERR(filename))
1714 RETURN(PTR_ERR(filename));
1716 namelen = strlen(filename);
1718 GOTO(out_rmdir, rc = -EINVAL);
1720 rc = ll_rmdir_entry(inode, filename, namelen);
1723 ll_putname(filename);
1727 RETURN(ll_rmfid(file, (void __user *)arg));
1728 case LL_IOC_LOV_SWAP_LAYOUTS:
1730 case IOC_OBD_STATFS:
1731 RETURN(ll_obd_statfs(inode, (void __user *)arg));
1732 case LL_IOC_LOV_GETSTRIPE:
1733 case LL_IOC_LOV_GETSTRIPE_NEW:
1734 case LL_IOC_MDC_GETINFO:
1735 case LL_IOC_MDC_GETINFO_OLD:
1736 case IOC_MDC_GETFILEINFO:
1737 case IOC_MDC_GETFILEINFO_OLD:
1738 case IOC_MDC_GETFILESTRIPE: {
1739 struct ptlrpc_request *request = NULL;
1740 struct ptlrpc_request *root_request = NULL;
1741 struct lov_user_md __user *lump;
1742 struct lov_mds_md *lmm = NULL;
1743 struct mdt_body *body;
1744 char *filename = NULL;
1745 lstat_t __user *statp = NULL;
1746 lstatx_t __user *stxp = NULL;
1747 __u64 __user *flagsp = NULL;
1748 __u32 __user *lmmsizep = NULL;
1749 struct lu_fid __user *fidp = NULL;
1752 if (cmd == IOC_MDC_GETFILEINFO_OLD ||
1753 cmd == IOC_MDC_GETFILEINFO ||
1754 cmd == IOC_MDC_GETFILESTRIPE) {
1755 filename = ll_getname((const char __user *)arg);
1756 if (IS_ERR(filename))
1757 RETURN(PTR_ERR(filename));
1759 rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
1760 &lmmsize, &request);
1762 rc = ll_dir_getstripe_default(inode, (void **)&lmm,
1768 body = req_capsule_server_get(&request->rq_pill,
1770 LASSERT(body != NULL);
1775 if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO ||
1776 cmd == LL_IOC_MDC_GETINFO ||
1777 cmd == IOC_MDC_GETFILEINFO_OLD ||
1778 cmd == LL_IOC_MDC_GETINFO_OLD)) {
1786 if (cmd == IOC_MDC_GETFILESTRIPE ||
1787 cmd == LL_IOC_LOV_GETSTRIPE ||
1788 cmd == LL_IOC_LOV_GETSTRIPE_NEW) {
1789 lump = (struct lov_user_md __user *)arg;
1790 } else if (cmd == IOC_MDC_GETFILEINFO_OLD ||
1791 cmd == LL_IOC_MDC_GETINFO_OLD){
1792 struct lov_user_mds_data_v1 __user *lmdp;
1794 lmdp = (struct lov_user_mds_data_v1 __user *)arg;
1795 statp = &lmdp->lmd_st;
1796 lump = &lmdp->lmd_lmm;
1798 struct lov_user_mds_data __user *lmdp;
1800 lmdp = (struct lov_user_mds_data __user *)arg;
1801 fidp = &lmdp->lmd_fid;
1802 stxp = &lmdp->lmd_stx;
1803 flagsp = &lmdp->lmd_flags;
1804 lmmsizep = &lmdp->lmd_lmmsize;
1805 lump = &lmdp->lmd_lmm;
1809 /* If the file has no striping then zero out *lump so
1810 * that the caller isn't confused by garbage. */
1811 if (clear_user(lump, sizeof(*lump)))
1812 GOTO(out_req, rc = -EFAULT);
1813 } else if (copy_to_user(lump, lmm, lmmsize)) {
1814 if (copy_to_user(lump, lmm, sizeof(*lump)))
1815 GOTO(out_req, rc = -EFAULT);
1819 if (cmd == IOC_MDC_GETFILEINFO_OLD ||
1820 cmd == LL_IOC_MDC_GETINFO_OLD) {
1823 st.st_dev = inode->i_sb->s_dev;
1824 st.st_mode = body->mbo_mode;
1825 st.st_nlink = body->mbo_nlink;
1826 st.st_uid = body->mbo_uid;
1827 st.st_gid = body->mbo_gid;
1828 st.st_rdev = body->mbo_rdev;
1829 st.st_size = body->mbo_size;
1830 st.st_blksize = PAGE_SIZE;
1831 st.st_blocks = body->mbo_blocks;
1832 st.st_atime = body->mbo_atime;
1833 st.st_mtime = body->mbo_mtime;
1834 st.st_ctime = body->mbo_ctime;
1835 st.st_ino = cl_fid_build_ino(&body->mbo_fid1,
1839 if (copy_to_user(statp, &st, sizeof(st)))
1840 GOTO(out_req, rc = -EFAULT);
1841 } else if (cmd == IOC_MDC_GETFILEINFO ||
1842 cmd == LL_IOC_MDC_GETINFO) {
1843 lstatx_t stx = { 0 };
1844 __u64 valid = body->mbo_valid;
1846 stx.stx_blksize = PAGE_SIZE;
1847 stx.stx_nlink = body->mbo_nlink;
1848 stx.stx_uid = body->mbo_uid;
1849 stx.stx_gid = body->mbo_gid;
1850 stx.stx_mode = body->mbo_mode;
1851 stx.stx_ino = cl_fid_build_ino(&body->mbo_fid1,
1854 stx.stx_size = body->mbo_size;
1855 stx.stx_blocks = body->mbo_blocks;
1856 stx.stx_atime.tv_sec = body->mbo_atime;
1857 stx.stx_ctime.tv_sec = body->mbo_ctime;
1858 stx.stx_mtime.tv_sec = body->mbo_mtime;
1859 stx.stx_rdev_major = MAJOR(body->mbo_rdev);
1860 stx.stx_rdev_minor = MINOR(body->mbo_rdev);
1861 stx.stx_dev_major = MAJOR(inode->i_sb->s_dev);
1862 stx.stx_dev_minor = MINOR(inode->i_sb->s_dev);
1863 stx.stx_mask |= STATX_BASIC_STATS;
1866 * For a striped directory, the size and blocks returned
1867 * from MDT is not correct.
1868 * The size and blocks are aggregated by client across
1870 * Thus for a striped directory, do not return the valid
1871 * FLSIZE and FLBLOCKS flags to the caller.
1872 * However, this whould be better decided by the MDS
1873 * instead of the client.
1875 if (cmd == LL_IOC_MDC_GETINFO &&
1876 ll_i2info(inode)->lli_lsm_md != NULL)
1877 valid &= ~(OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
1879 if (flagsp && copy_to_user(flagsp, &valid,
1881 GOTO(out_req, rc = -EFAULT);
1883 if (fidp && copy_to_user(fidp, &body->mbo_fid1,
1885 GOTO(out_req, rc = -EFAULT);
1887 if (!(valid & OBD_MD_FLSIZE))
1888 stx.stx_mask &= ~STATX_SIZE;
1889 if (!(valid & OBD_MD_FLBLOCKS))
1890 stx.stx_mask &= ~STATX_BLOCKS;
1892 if (stxp && copy_to_user(stxp, &stx, sizeof(stx)))
1893 GOTO(out_req, rc = -EFAULT);
1895 if (lmmsizep && copy_to_user(lmmsizep, &lmmsize,
1897 GOTO(out_req, rc = -EFAULT);
1902 ptlrpc_req_finished(request);
1903 ptlrpc_req_finished(root_request);
1905 ll_putname(filename);
1908 case OBD_IOC_QUOTACTL: {
1909 struct if_quotactl *qctl;
1911 OBD_ALLOC_PTR(qctl);
1915 if (copy_from_user(qctl, (void __user *)arg, sizeof(*qctl)))
1916 GOTO(out_quotactl, rc = -EFAULT);
1918 rc = quotactl_ioctl(sbi, qctl);
1921 copy_to_user((void __user *)arg, qctl, sizeof(*qctl)))
1928 case OBD_IOC_GETDTNAME:
1929 case OBD_IOC_GETMDNAME:
1930 RETURN(ll_get_obd_name(inode, cmd, arg));
1931 case LL_IOC_FLUSHCTX:
1932 RETURN(ll_flush_ctx(inode));
1933 case LL_IOC_GETOBDCOUNT: {
1935 struct obd_export *exp;
1937 if (copy_from_user(&count, (int __user *)arg, sizeof(int)))
1940 /* get ost count when count is zero, get mdt count otherwise */
1941 exp = count ? sbi->ll_md_exp : sbi->ll_dt_exp;
1942 vallen = sizeof(count);
1943 rc = obd_get_info(NULL, exp, sizeof(KEY_TGT_COUNT),
1944 KEY_TGT_COUNT, &vallen, &count);
1946 CERROR("get target count failed: %d\n", rc);
1950 if (copy_to_user((int __user *)arg, &count, sizeof(int)))
1955 case LL_IOC_PATH2FID:
1956 if (copy_to_user((void __user *)arg, ll_inode2fid(inode),
1957 sizeof(struct lu_fid)))
1960 case LL_IOC_GET_CONNECT_FLAGS: {
1961 RETURN(obd_iocontrol(cmd, sbi->ll_md_exp, 0, NULL,
1962 (void __user *)arg));
1964 case OBD_IOC_FID2PATH:
1965 RETURN(ll_fid2path(inode, (void __user *)arg));
1966 case LL_IOC_GETPARENT:
1967 RETURN(ll_getparent(file, (void __user *)arg));
1968 case LL_IOC_FID2MDTIDX: {
1969 struct obd_export *exp = ll_i2mdexp(inode);
1973 if (copy_from_user(&fid, (const struct lu_fid __user *)arg,
1977 /* Call mdc_iocontrol */
1978 rc = obd_iocontrol(LL_IOC_FID2MDTIDX, exp, sizeof(fid), &fid,
1979 (__u32 __user *)&index);
1985 case LL_IOC_HSM_REQUEST: {
1986 struct hsm_user_request *hur;
1993 /* We don't know the true size yet; copy the fixed-size part */
1994 if (copy_from_user(hur, (void __user *)arg, sizeof(*hur))) {
1999 /* Compute the whole struct size */
2000 totalsize = hur_len(hur);
2005 /* Final size will be more than double totalsize */
2006 if (totalsize >= MDS_MAXREQSIZE / 3)
2009 OBD_ALLOC_LARGE(hur, totalsize);
2013 /* Copy the whole struct */
2014 if (copy_from_user(hur, (void __user *)arg, totalsize))
2015 GOTO(out_hur, rc = -EFAULT);
2017 if (hur->hur_request.hr_action == HUA_RELEASE) {
2018 const struct lu_fid *fid;
2022 for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
2023 fid = &hur->hur_user_item[i].hui_fid;
2024 f = search_inode_for_lustre(inode->i_sb, fid);
2030 rc = ll_hsm_release(f);
2036 rc = obd_iocontrol(cmd, ll_i2mdexp(inode), totalsize,
2041 OBD_FREE_LARGE(hur, totalsize);
2045 case LL_IOC_HSM_PROGRESS: {
2046 struct hsm_progress_kernel hpk;
2047 struct hsm_progress hp;
2049 if (copy_from_user(&hp, (void __user *)arg, sizeof(hp)))
2052 hpk.hpk_fid = hp.hp_fid;
2053 hpk.hpk_cookie = hp.hp_cookie;
2054 hpk.hpk_extent = hp.hp_extent;
2055 hpk.hpk_flags = hp.hp_flags;
2056 hpk.hpk_errval = hp.hp_errval;
2057 hpk.hpk_data_version = 0;
2059 /* File may not exist in Lustre; all progress
2060 * reported to Lustre root */
2061 rc = obd_iocontrol(cmd, sbi->ll_md_exp, sizeof(hpk), &hpk,
2065 case LL_IOC_HSM_CT_START:
2066 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
2069 rc = copy_and_ct_start(cmd, sbi->ll_md_exp,
2070 (struct lustre_kernelcomm __user *)arg);
2073 case LL_IOC_HSM_COPY_START: {
2074 struct hsm_copy *copy;
2077 OBD_ALLOC_PTR(copy);
2080 if (copy_from_user(copy, (char __user *)arg, sizeof(*copy))) {
2085 rc = ll_ioc_copy_start(inode->i_sb, copy);
2086 if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
2092 case LL_IOC_HSM_COPY_END: {
2093 struct hsm_copy *copy;
2096 OBD_ALLOC_PTR(copy);
2099 if (copy_from_user(copy, (char __user *)arg, sizeof(*copy))) {
2104 rc = ll_ioc_copy_end(inode->i_sb, copy);
2105 if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
2111 case LL_IOC_MIGRATE: {
2112 struct lmv_user_md *lum;
2119 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
2123 data = (struct obd_ioctl_data *)buf;
2124 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
2125 data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
2126 GOTO(migrate_free, rc = -EINVAL);
2128 filename = data->ioc_inlbuf1;
2129 namelen = data->ioc_inllen1;
2131 if (namelen < 1 || namelen != strlen(filename) + 1) {
2132 CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
2133 GOTO(migrate_free, rc = -EINVAL);
2136 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
2137 if (lum->lum_magic != LMV_USER_MAGIC &&
2138 lum->lum_magic != LMV_USER_MAGIC_SPECIFIC) {
2140 CERROR("%s: wrong lum magic %x: rc = %d\n",
2141 filename, lum->lum_magic, rc);
2142 GOTO(migrate_free, rc);
2145 rc = ll_migrate(inode, file, lum, filename);
2147 OBD_FREE_LARGE(buf, len);
2151 case LL_IOC_FSGETXATTR:
2152 RETURN(ll_ioctl_fsgetxattr(inode, cmd, arg));
2153 case LL_IOC_FSSETXATTR:
2154 RETURN(ll_ioctl_fssetxattr(inode, cmd, arg));
2155 case LL_IOC_PCC_DETACH_BY_FID: {
2156 struct lu_pcc_detach_fid *detach;
2158 struct inode *inode2;
2161 OBD_ALLOC_PTR(detach);
2165 if (copy_from_user(detach,
2166 (const struct lu_pcc_detach_fid __user *)arg,
2168 GOTO(out_detach, rc = -EFAULT);
2170 fid = &detach->pccd_fid;
2171 ino = cl_fid_build_ino(fid, ll_need_32bit_api(sbi));
2172 inode2 = ilookup5(inode->i_sb, ino, ll_test_inode_by_fid, fid);
2174 /* Target inode is not in inode cache, and PCC file
2175 * has aleady released, return immdiately.
2177 GOTO(out_detach, rc = 0);
2179 if (!S_ISREG(inode2->i_mode))
2180 GOTO(out_iput, rc = -EINVAL);
2182 if (!inode_owner_or_capable(inode2))
2183 GOTO(out_iput, rc = -EPERM);
2185 rc = pcc_ioctl_detach(inode2, detach->pccd_opt);
2189 OBD_FREE_PTR(detach);
2193 RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp, 0, NULL,
2194 (void __user *)arg));
2198 static loff_t ll_dir_seek(struct file *file, loff_t offset, int origin)
2200 struct inode *inode = file->f_mapping->host;
2201 struct ll_file_data *fd = file->private_data;
2202 struct ll_sb_info *sbi = ll_i2sbi(inode);
2203 int api32 = ll_need_32bit_api(sbi);
2204 loff_t ret = -EINVAL;
2212 offset += file->f_pos;
2218 offset += LL_DIR_END_OFF_32BIT;
2220 offset += LL_DIR_END_OFF;
2227 ((api32 && offset <= LL_DIR_END_OFF_32BIT) ||
2228 (!api32 && offset <= LL_DIR_END_OFF))) {
2229 if (offset != file->f_pos) {
2230 if ((api32 && offset == LL_DIR_END_OFF_32BIT) ||
2231 (!api32 && offset == LL_DIR_END_OFF))
2232 fd->lfd_pos = MDS_DIR_END_OFF;
2233 else if (api32 && sbi->ll_flags & LL_SBI_64BIT_HASH)
2234 fd->lfd_pos = offset << 32;
2236 fd->lfd_pos = offset;
2237 file->f_pos = offset;
2238 file->f_version = 0;
2245 inode_unlock(inode);
2249 static int ll_dir_open(struct inode *inode, struct file *file)
2252 RETURN(ll_file_open(inode, file));
2255 static int ll_dir_release(struct inode *inode, struct file *file)
2258 RETURN(ll_file_release(inode, file));
2261 const struct file_operations ll_dir_operations = {
2262 .llseek = ll_dir_seek,
2263 .open = ll_dir_open,
2264 .release = ll_dir_release,
2265 .read = generic_read_dir,
2266 #ifdef HAVE_DIR_CONTEXT
2267 .iterate_shared = ll_iterate,
2269 .readdir = ll_readdir,
2271 .unlocked_ioctl = ll_dir_ioctl,