1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 1992, 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
11 * linux/fs/minix/dir.c
14 * Copyright (C) 1991, 1992 Linus Torvalds
16 * ext2 directory handling functions
18 * Big-endian to little-endian byte-swapping/bitmaps by
19 * David S. Miller (davem@caip.rutgers.edu), 1995
21 * All code that works with directory layout had been switched to pagecache
24 * Adapted for Lustre Light
25 * Copyright (C) 2002-2003, Cluster File Systems, Inc.
30 #include <linux/ext2_fs.h>
31 #include <linux/pagemap.h>
33 #include <linux/version.h>
34 #include <linux/smp_lock.h>
35 #include <asm/uaccess.h>
36 #include <linux/buffer_head.h> // for wait_on_buffer
38 #define DEBUG_SUBSYSTEM S_LLITE
40 #include <obd_support.h>
41 #include <obd_class.h>
42 #include <lustre_lib.h>
43 #include <lustre/lustre_idl.h>
44 #include <lustre_lite.h>
45 #include <lustre_dlm.h>
46 #include <lustre_fid.h>
47 #include "llite_internal.h"
49 #ifdef HAVE_PG_FS_MISC
50 #define PageChecked(page) test_bit(PG_fs_misc, &(page)->flags)
51 #define SetPageChecked(page) set_bit(PG_fs_misc, &(page)->flags)
55 * (new) readdir implementation overview.
57 * Original lustre readdir implementation cached exact copy of raw directory
58 * pages on the client. These pages were indexed in client page cache by
59 * logical offset in the directory file. This design, while very simple and
60 * intuitive had some inherent problems:
62 * . it implies that byte offset to the directory entry serves as a
63 * telldir(3)/seekdir(3) cookie, but that offset is not stable: in
64 * ext3/htree directory entries may move due to splits, and more
67 * . it is incompatible with the design of split directories for cmd3,
68 * that assumes that names are distributed across nodes based on their
69 * hash, and so readdir should be done in hash order.
71 * New readdir implementation does readdir in hash order, and uses hash of a
72 * file name as a telldir/seekdir cookie. This led to number of complications:
74 * . hash is not unique, so it cannot be used to index cached directory
75 * pages on the client (note, that it requires a whole pageful of hash
76 * collided entries to cause two pages to have identical hashes);
78 * . hash is not unique, so it cannot, strictly speaking, be used as an
79 * entry cookie. ext3/htree has the same problem and lustre implementation
80 * mimics their solution: seekdir(hash) positions directory at the first
81 * entry with the given hash.
87 * Client caches directory pages using hash of the first entry as an index. As
88 * noted above hash is not unique, so this solution doesn't work as is:
89 * special processing is needed for "page hash chains" (i.e., sequences of
90 * pages filled with entries all having the same hash value).
92 * First, such chains have to be detected. To this end, server returns to the
93 * client the hash of the first entry on the page next to one returned. When
94 * client detects that this hash is the same as hash of the first entry on the
95 * returned page, page hash collision has to be handled. Pages in the
96 * hash chain, except first one, are termed "overflow pages".
98 * Solution to index uniqueness problem is to not cache overflow
99 * pages. Instead, when page hash collision is detected, all overflow pages
100 * from emerging chain are immediately requested from the server and placed in
101 * a special data structure (struct ll_dir_chain). This data structure is used
102 * by ll_readdir() to process entries from overflow pages. When readdir
103 * invocation finishes, overflow pages are discarded. If page hash collision
104 * chain weren't completely processed, next call to readdir will again detect
105 * page hash collision, again read overflow pages in, process next portion of
106 * entries and again discard the pages. This is not as wasteful as it looks,
107 * because, given reasonable hash, page hash collisions are extremely rare.
109 * 1. directory positioning
111 * When seekdir(hash) is called, original
122 * identification of and access to overflow pages
132 static __u32 hash_x_index(__u32 value)
134 return ((__u32)~0) - value;
136 #ifdef HAVE_PG_FS_MISC
137 #define PageChecked(page) test_bit(PG_fs_misc, &(page)->flags)
138 #define SetPageChecked(page) set_bit(PG_fs_misc, &(page)->flags)
141 /* returns the page unlocked, but with a reference */
142 static int ll_dir_readpage(struct file *file, struct page *page)
144 struct inode *inode = page->mapping->host;
145 struct ptlrpc_request *request;
146 struct mdt_body *body;
152 hash = hash_x_index(page->index);
153 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) off %lu\n",
154 inode->i_ino, inode->i_generation, inode, (unsigned long)hash);
156 oc = ll_mdscapa_get(inode);
157 rc = md_readpage(ll_i2sbi(inode)->ll_md_exp, ll_inode2fid(inode),
158 oc, hash, page, &request);
161 body = lustre_msg_buf(request->rq_repmsg, REPLY_REC_OFF,
163 /* Checked by mdc_readpage() */
164 LASSERT(body != NULL);
166 /* Swabbed by mdc_readpage() */
167 LASSERT(lustre_rep_swabbed(request, REPLY_REC_OFF));
169 if (body->valid & OBD_MD_FLSIZE)
170 i_size_write(inode, body->size);
171 SetPageUptodate(page);
173 ptlrpc_req_finished(request);
180 struct address_space_operations ll_dir_aops = {
181 .readpage = ll_dir_readpage,
184 static inline unsigned long dir_pages(struct inode *inode)
186 return (i_size_read(inode) + CFS_PAGE_SIZE - 1) >> CFS_PAGE_SHIFT;
189 static inline unsigned ll_chunk_size(struct inode *inode)
191 return inode->i_sb->s_blocksize;
194 static void ll_check_page(struct inode *dir, struct page *page)
196 /* XXX: check page format later */
197 SetPageChecked(page);
200 static inline void ll_put_page(struct page *page)
203 page_cache_release(page);
207 * Find, kmap and return page that contains given hash.
209 static struct page *ll_dir_page_locate(struct inode *dir, unsigned long hash,
210 __u32 *start, __u32 *end)
212 struct address_space *mapping = dir->i_mapping;
214 * Complement of hash is used as an index so that
215 * radix_tree_gang_lookup() can be used to find a page with starting
216 * hash _smaller_ than one we are looking for.
218 unsigned long offset = hash_x_index(hash);
222 TREE_READ_LOCK_IRQ(mapping);
223 found = radix_tree_gang_lookup(&mapping->page_tree,
224 (void **)&page, offset, 1);
226 struct lu_dirpage *dp;
228 page_cache_get(page);
229 TREE_READ_UNLOCK_IRQ(mapping);
231 * In contrast to find_lock_page() we are sure that directory
232 * page cannot be truncated (while DLM lock is held) and,
233 * hence, can avoid restart.
235 * In fact, page cannot be locked here at all, because
236 * ll_dir_readpage() does synchronous io.
239 if (PageUptodate(page)) {
241 *start = le32_to_cpu(dp->ldp_hash_start);
242 *end = le32_to_cpu(dp->ldp_hash_end);
243 LASSERT(*start <= hash);
244 if (hash > *end || (*end != *start && hash == *end)) {
247 ll_truncate_complete_page(page);
249 page_cache_release(page);
253 page_cache_release(page);
254 page = ERR_PTR(-EIO);
258 TREE_READ_UNLOCK_IRQ(mapping);
265 * Chain of hash overflow pages.
267 struct ll_dir_chain {
268 /* XXX something. Later */
271 static void ll_dir_chain_init(struct ll_dir_chain *chain)
275 static void ll_dir_chain_fini(struct ll_dir_chain *chain)
279 static struct page *ll_get_dir_page(struct inode *dir, __u32 hash, int exact,
280 struct ll_dir_chain *chain)
282 ldlm_policy_data_t policy = {.l_inodebits = {MDS_INODELOCK_UPDATE} };
283 struct address_space *mapping = dir->i_mapping;
284 struct lustre_handle lockh;
285 struct lu_dirpage *dp;
293 rc = md_lock_match(ll_i2sbi(dir)->ll_md_exp, LDLM_FL_BLOCK_GRANTED,
294 ll_inode2fid(dir), LDLM_IBITS, &policy, mode, &lockh);
296 struct ldlm_enqueue_info einfo = { LDLM_IBITS, mode,
297 ll_md_blocking_ast, ldlm_completion_ast, NULL, dir };
298 struct lookup_intent it = { .it_op = IT_READDIR };
299 struct ptlrpc_request *request;
300 struct md_op_data *op_data;
302 op_data = ll_prep_md_op_data(NULL, dir, NULL, NULL, 0, 0,
303 LUSTRE_OPC_ANY, NULL);
305 return (void *)op_data;
307 rc = md_enqueue(ll_i2sbi(dir)->ll_md_exp, &einfo, &it,
308 op_data, &lockh, NULL, 0, 0);
310 ll_finish_md_op_data(op_data);
312 request = (struct ptlrpc_request *)it.d.lustre.it_data;
314 ptlrpc_req_finished(request);
316 CERROR("lock enqueue: rc: %d\n", rc);
320 /* for cross-ref object, l_ast_data of the lock may not be set,
321 * we reset it here */
322 md_set_lock_data(ll_i2sbi(dir)->ll_md_exp, &lockh.cookie, dir);
324 ldlm_lock_dump_handle(D_OTHER, &lockh);
326 page = ll_dir_page_locate(dir, hash, &start, &end);
328 GOTO(out_unlock, page);
332 * XXX nikita: not entirely correct handling of a corner case:
333 * suppose hash chain of entries with hash value HASH crosses
334 * border between pages P0 and P1. First both P0 and P1 are
335 * cached, seekdir() is called for some entry from the P0 part
336 * of the chain. Later P0 goes out of cache. telldir(HASH)
337 * happens and finds P1, as it starts with matching hash
338 * value. Remaining entries from P0 part of the chain are
339 * skipped. (Is that really a bug?)
341 * Possible solutions: 0. don't cache P1 is such case, handle
342 * it as an "overflow" page. 1. invalidate all pages at
343 * once. 2. use HASH|1 as an index for P1.
345 if (exact && hash != start) {
347 * readdir asked for a page starting _exactly_ from
348 * given hash, but cache contains stale page, with
349 * entries with smaller hash values. Stale page should
350 * be invalidated, and new one fetched.
352 CWARN("Stale readpage page %p: %#lx != %#lx\n", page,
353 (unsigned long)hash, (unsigned long)start);
355 ll_truncate_complete_page(page);
357 page_cache_release(page);
359 GOTO(hash_collision, page);
362 page = read_cache_page(mapping, hash_x_index(hash),
363 (filler_t*)mapping->a_ops->readpage, NULL);
365 GOTO(out_unlock, page);
369 if (!PageUptodate(page))
371 if (!PageChecked(page))
372 ll_check_page(dir, page);
376 dp = page_address(page);
378 start = le32_to_cpu(dp->ldp_hash_start);
379 end = le32_to_cpu(dp->ldp_hash_end);
381 LASSERT(start == hash);
382 CWARN("Page-wide hash collision: %#lx\n", (unsigned long)end);
384 * Fetch whole overflow chain...
391 ldlm_lock_decref(&lockh, mode);
396 page = ERR_PTR(-EIO);
400 int ll_readdir(struct file *filp, void *cookie, filldir_t filldir)
402 struct inode *inode = filp->f_dentry->d_inode;
403 struct ll_inode_info *info = ll_i2info(inode);
404 struct ll_sb_info *sbi = ll_i2sbi(inode);
405 __u32 pos = filp->f_pos;
407 struct ll_dir_chain chain;
413 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) pos %lu/%llu\n",
414 inode->i_ino, inode->i_generation, inode,
415 (unsigned long)pos, i_size_read(inode));
417 if (pos == DIR_END_OFF)
426 ll_dir_chain_init(&chain);
428 page = ll_get_dir_page(inode, pos, 0, &chain);
430 while (rc == 0 && !done) {
431 struct lu_dirpage *dp;
432 struct lu_dirent *ent;
436 * If page is empty (end of directoryis reached),
439 __u32 hash = DIR_END_OFF;
442 dp = page_address(page);
443 for (ent = lu_dirent_start(dp); ent != NULL && !done;
444 ent = lu_dirent_next(ent)) {
451 * XXX: implement correct swabbing here.
454 hash = le32_to_cpu(ent->lde_hash);
455 namelen = le16_to_cpu(ent->lde_namelen);
459 * Skip until we find target hash
471 name = ent->lde_name;
472 fid_le_to_cpu(&fid, &fid);
473 ino = ll_fid_build_ino(sbi, &fid);
475 done = filldir(cookie, name, namelen,
476 (loff_t)hash, ino, DT_UNKNOWN);
478 next = le32_to_cpu(dp->ldp_hash_end);
482 if (pos == DIR_END_OFF)
484 * End of directory reached.
487 else if (1 /* chain is exhausted*/)
489 * Normal case: continue to the next
492 page = ll_get_dir_page(inode, pos, 1,
496 * go into overflow page.
503 CERROR("error reading dir "DFID" at %lu: rc %d\n",
504 PFID(&info->lli_fid), (unsigned long)pos, rc);
508 filp->f_pos = (loff_t)(__s32)pos;
509 filp->f_version = inode->i_version;
510 touch_atime(filp->f_vfsmnt, filp->f_dentry);
512 ll_dir_chain_fini(&chain);
517 #define QCTL_COPY(out, in) \
519 Q_COPY(out, in, qc_cmd); \
520 Q_COPY(out, in, qc_type); \
521 Q_COPY(out, in, qc_id); \
522 Q_COPY(out, in, qc_stat); \
523 Q_COPY(out, in, qc_dqinfo); \
524 Q_COPY(out, in, qc_dqblk); \
527 int ll_send_mgc_param(struct obd_export *mgc, char *string)
529 struct mgs_send_param *msp;
536 strncpy(msp->mgs_param, string, MGS_PARAM_MAXLEN);
537 rc = obd_set_info_async(mgc, strlen(KEY_SET_INFO), KEY_SET_INFO,
538 sizeof(struct mgs_send_param), msp, NULL);
540 CERROR("Failed to set parameter: %d\n", rc);
546 char *ll_get_fsname(struct inode *inode)
548 struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
552 OBD_ALLOC(fsname, MGS_PARAM_MAXLEN);
553 len = strlen(lsi->lsi_lmd->lmd_profile);
554 ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
555 if (ptr && (strcmp(ptr, "-client") == 0))
557 strncpy(fsname, lsi->lsi_lmd->lmd_profile, len);
563 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
566 struct ll_sb_info *sbi = ll_i2sbi(inode);
567 struct md_op_data *op_data;
568 struct ptlrpc_request *req = NULL;
570 struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
571 struct obd_device *mgc = lsi->lsi_mgc;
572 char *fsname = NULL, *param = NULL;
575 * This is coming from userspace, so should be in
576 * local endian. But the MDS would like it in little
577 * endian, so we swab it before we send it.
579 if (lump->lmm_magic != LOV_USER_MAGIC)
582 if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC))
583 lustre_swab_lov_user_md(lump);
585 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
586 LUSTRE_OPC_ANY, NULL);
588 RETURN(PTR_ERR(op_data));
590 /* swabbing is done in lov_setstripe() on server side */
591 rc = md_setattr(sbi->ll_md_exp, op_data, lump, sizeof(*lump),
592 NULL, 0, &req, NULL);
593 ll_finish_md_op_data(op_data);
594 ptlrpc_req_finished(req);
596 if (rc != -EPERM && rc != -EACCES)
597 CERROR("mdc_setattr fails: rc = %d\n", rc);
600 if (set_default && mgc->u.cli.cl_mgc_mgsexp) {
601 OBD_ALLOC(param, MGS_PARAM_MAXLEN);
603 /* Get fsname and assume devname to be -MDT0000. */
604 fsname = ll_get_fsname(inode);
605 /* Set root stripesize */
606 sprintf(param, "%s-MDT0000.lov.stripesize=%u", fsname,
607 lump->lmm_stripe_size);
608 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
612 /* Set root stripecount */
613 sprintf(param, "%s-MDT0000.lov.stripecount=%u", fsname,
614 lump->lmm_stripe_count);
615 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
619 /* Set root stripeoffset */
620 sprintf(param, "%s-MDT0000.lov.stripeoffset=%u", fsname,
621 lump->lmm_stripe_offset);
622 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
627 OBD_FREE(fsname, MGS_PARAM_MAXLEN);
629 OBD_FREE(param, MGS_PARAM_MAXLEN);
634 int ll_dir_getstripe(struct inode *inode, struct lov_mds_md **lmmp,
635 int *lmm_size, struct ptlrpc_request **request)
637 struct ll_sb_info *sbi = ll_i2sbi(inode);
638 struct mdt_body *body;
639 struct lov_mds_md *lmm = NULL;
640 struct ptlrpc_request *req = NULL;
644 rc = ll_get_max_mdsize(sbi, &lmmsize);
648 oc = ll_mdscapa_get(inode);
649 rc = md_getattr(sbi->ll_md_exp, ll_inode2fid(inode),
650 oc, OBD_MD_FLEASIZE | OBD_MD_FLDIREA,
654 CDEBUG(D_INFO, "md_getattr failed on inode "
655 "%lu/%u: rc %d\n", inode->i_ino,
656 inode->i_generation, rc);
660 body = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF, sizeof(*body));
661 LASSERT(body != NULL); /* checked by md_getattr_name */
662 /* swabbed by mdc_getattr_name */
663 LASSERT(lustre_rep_swabbed(req, REPLY_REC_OFF));
665 lmmsize = body->eadatasize;
667 if (!(body->valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
669 GOTO(out, rc = -ENODATA);
672 lmm = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF + 1, lmmsize);
673 LASSERT(lmm != NULL);
674 LASSERT(lustre_rep_swabbed(req, REPLY_REC_OFF + 1));
677 * This is coming from the MDS, so is probably in
678 * little endian. We convert it to host endian before
679 * passing it to userspace.
681 if (lmm->lmm_magic == __swab32(LOV_MAGIC)) {
682 lustre_swab_lov_user_md((struct lov_user_md *)lmm);
683 lustre_swab_lov_user_md_objects((struct lov_user_md *)lmm);
692 static int ll_dir_ioctl(struct inode *inode, struct file *file,
693 unsigned int cmd, unsigned long arg)
695 struct ll_sb_info *sbi = ll_i2sbi(inode);
696 struct obd_ioctl_data *data;
699 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), cmd=%#x\n",
700 inode->i_ino, inode->i_generation, inode, cmd);
702 /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
703 if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
706 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
708 case EXT3_IOC_GETFLAGS:
709 case EXT3_IOC_SETFLAGS:
710 RETURN(ll_iocontrol(inode, file, cmd, arg));
711 case EXT3_IOC_GETVERSION_OLD:
712 case EXT3_IOC_GETVERSION:
713 RETURN(put_user(inode->i_generation, (int *)arg));
714 /* We need to special case any other ioctls we want to handle,
715 * to send them to the MDS/OST as appropriate and to properly
716 * network encode the arg field.
717 case EXT3_IOC_SETVERSION_OLD:
718 case EXT3_IOC_SETVERSION:
720 case IOC_MDC_LOOKUP: {
721 struct ptlrpc_request *request = NULL;
722 int namelen, rc, len = 0;
727 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
732 filename = data->ioc_inlbuf1;
733 namelen = data->ioc_inllen1;
736 CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
737 GOTO(out, rc = -EINVAL);
740 oc = ll_mdscapa_get(inode);
741 rc = md_getattr_name(sbi->ll_md_exp, ll_inode2fid(inode), oc,
742 filename, namelen, OBD_MD_FLID, 0,
746 CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
750 ptlrpc_req_finished(request);
754 obd_ioctl_freedata(buf, len);
757 case LL_IOC_LOV_SETSTRIPE: {
758 struct lov_user_md lum, *lump = (struct lov_user_md *)arg;
762 LASSERT(sizeof(lum) == sizeof(*lump));
763 LASSERT(sizeof(lum.lmm_objects[0]) ==
764 sizeof(lump->lmm_objects[0]));
765 rc = copy_from_user(&lum, lump, sizeof(lum));
769 if (inode->i_sb->s_root == file->f_dentry)
772 rc = ll_dir_setstripe(inode, &lum, set_default);
776 case LL_IOC_OBD_STATFS:
777 RETURN(ll_obd_statfs(inode, (void *)arg));
778 case LL_IOC_LOV_GETSTRIPE:
779 case LL_IOC_MDC_GETINFO:
780 case IOC_MDC_GETFILEINFO:
781 case IOC_MDC_GETFILESTRIPE: {
782 struct ptlrpc_request *request = NULL;
783 struct lov_user_md *lump;
784 struct lov_mds_md *lmm = NULL;
785 struct mdt_body *body;
786 char *filename = NULL;
789 if (cmd == IOC_MDC_GETFILEINFO ||
790 cmd == IOC_MDC_GETFILESTRIPE) {
791 filename = getname((const char *)arg);
792 if (IS_ERR(filename))
793 RETURN(PTR_ERR(filename));
795 rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
798 rc = ll_dir_getstripe(inode, &lmm, &lmmsize, &request);
802 body = lustre_msg_buf(request->rq_repmsg,
803 REPLY_REC_OFF, sizeof(*body));
804 LASSERT(body != NULL); /* checked by md_getattr_name */
805 /* swabbed by md_getattr_name */
806 LASSERT(lustre_rep_swabbed(request, REPLY_REC_OFF));
812 if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO ||
813 cmd == LL_IOC_MDC_GETINFO))
814 GOTO(skip_lmm, rc = 0);
819 if (cmd == IOC_MDC_GETFILESTRIPE ||
820 cmd == LL_IOC_LOV_GETSTRIPE) {
821 lump = (struct lov_user_md *)arg;
823 struct lov_user_mds_data *lmdp;
824 lmdp = (struct lov_user_mds_data *)arg;
825 lump = &lmdp->lmd_lmm;
827 rc = copy_to_user(lump, lmm, lmmsize);
829 GOTO(out_lmm, rc = -EFAULT);
831 if (cmd == IOC_MDC_GETFILEINFO || cmd == LL_IOC_MDC_GETINFO) {
832 struct lov_user_mds_data *lmdp;
835 st.st_dev = inode->i_sb->s_dev;
836 st.st_mode = body->mode;
837 st.st_nlink = body->nlink;
838 st.st_uid = body->uid;
839 st.st_gid = body->gid;
840 st.st_rdev = body->rdev;
841 st.st_size = body->size;
842 st.st_blksize = CFS_PAGE_SIZE;
843 st.st_blocks = body->blocks;
844 st.st_atime = body->atime;
845 st.st_mtime = body->mtime;
846 st.st_ctime = body->ctime;
847 st.st_ino = inode->i_ino;
849 lmdp = (struct lov_user_mds_data *)arg;
850 rc = copy_to_user(&lmdp->lmd_st, &st, sizeof(st));
852 GOTO(out_lmm, rc = -EFAULT);
857 if (lmm && lmm->lmm_magic == LOV_MAGIC_JOIN)
858 OBD_FREE(lmm, lmmsize);
860 ptlrpc_req_finished(request);
865 case IOC_LOV_GETINFO: {
866 struct lov_user_mds_data *lumd;
867 struct lov_stripe_md *lsm;
868 struct lov_user_md *lum;
869 struct lov_mds_md *lmm;
874 lumd = (struct lov_user_mds_data *)arg;
875 lum = &lumd->lmd_lmm;
877 rc = ll_get_max_mdsize(sbi, &lmmsize);
881 OBD_ALLOC(lmm, lmmsize);
882 rc = copy_from_user(lmm, lum, lmmsize);
884 GOTO(free_lmm, rc = -EFAULT);
886 rc = obd_unpackmd(sbi->ll_dt_exp, &lsm, lmm, lmmsize);
888 GOTO(free_lmm, rc = -ENOMEM);
890 rc = obd_checkmd(sbi->ll_dt_exp, sbi->ll_md_exp, lsm);
894 /* Perform glimpse_size operation. */
895 memset(&st, 0, sizeof(st));
897 rc = ll_glimpse_ioctl(sbi, lsm, &st);
901 rc = copy_to_user(&lumd->lmd_st, &st, sizeof(st));
903 GOTO(free_lsm, rc = -EFAULT);
907 obd_free_memmd(sbi->ll_dt_exp, &lsm);
909 OBD_FREE(lmm, lmmsize);
912 case OBD_IOC_LLOG_CATINFO: {
913 struct ptlrpc_request *req = NULL;
916 char *bufs[3] = { NULL }, *str;
917 int lens[3] = { sizeof(struct ptlrpc_body) };
918 int size[2] = { sizeof(struct ptlrpc_body) };
920 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
925 if (!data->ioc_inlbuf1) {
926 obd_ioctl_freedata(buf, len);
930 lens[REQ_REC_OFF] = data->ioc_inllen1;
931 bufs[REQ_REC_OFF] = data->ioc_inlbuf1;
932 if (data->ioc_inllen2) {
933 lens[REQ_REC_OFF + 1] = data->ioc_inllen2;
934 bufs[REQ_REC_OFF + 1] = data->ioc_inlbuf2;
936 lens[REQ_REC_OFF + 1] = 0;
937 bufs[REQ_REC_OFF + 1] = NULL;
940 req = ptlrpc_prep_req(sbi2mdc(sbi)->cl_import,
941 LUSTRE_LOG_VERSION, LLOG_CATINFO, 3, lens,
944 GOTO(out_catinfo, rc = -ENOMEM);
946 size[REPLY_REC_OFF] = data->ioc_plen1;
947 ptlrpc_req_set_repsize(req, 2, size);
949 rc = ptlrpc_queue_wait(req);
951 str = lustre_msg_string(req->rq_repmsg, REPLY_REC_OFF,
953 rc = copy_to_user(data->ioc_pbuf1, str, data->ioc_plen1);
955 ptlrpc_req_finished(req);
957 obd_ioctl_freedata(buf, len);
960 case OBD_IOC_QUOTACHECK: {
961 struct obd_quotactl *oqctl;
964 if (!capable(CAP_SYS_ADMIN))
967 OBD_ALLOC_PTR(oqctl);
970 oqctl->qc_type = arg;
971 rc = obd_quotacheck(sbi->ll_md_exp, oqctl);
973 CDEBUG(D_INFO, "md_quotacheck failed: rc %d\n", rc);
977 rc = obd_quotacheck(sbi->ll_dt_exp, oqctl);
979 CDEBUG(D_INFO, "obd_quotacheck failed: rc %d\n", rc);
984 case OBD_IOC_POLL_QUOTACHECK: {
985 struct if_quotacheck *check;
988 if (!capable(CAP_SYS_ADMIN))
991 OBD_ALLOC_PTR(check);
995 rc = obd_iocontrol(cmd, sbi->ll_md_exp, 0, (void *)check,
998 CDEBUG(D_QUOTA, "mdc ioctl %d failed: %d\n", cmd, rc);
999 if (copy_to_user((void *)arg, check, sizeof(*check)))
1004 rc = obd_iocontrol(cmd, sbi->ll_dt_exp, 0, (void *)check,
1007 CDEBUG(D_QUOTA, "osc ioctl %d failed: %d\n", cmd, rc);
1008 if (copy_to_user((void *)arg, check, sizeof(*check)))
1013 OBD_FREE_PTR(check);
1016 #ifdef HAVE_QUOTA_SUPPORT
1017 case OBD_IOC_QUOTACTL: {
1018 struct if_quotactl *qctl;
1019 struct obd_quotactl *oqctl;
1021 int cmd, type, id, rc = 0;
1023 OBD_ALLOC_PTR(qctl);
1027 OBD_ALLOC_PTR(oqctl);
1032 if (copy_from_user(qctl, (void *)arg, sizeof(*qctl)))
1033 GOTO(out_quotactl, rc = -EFAULT);
1036 type = qctl->qc_type;
1043 if (!capable(CAP_SYS_ADMIN))
1044 GOTO(out_quotactl, rc = -EPERM);
1047 if (((type == USRQUOTA && current->euid != id) ||
1048 (type == GRPQUOTA && !in_egroup_p(id))) &&
1049 !capable(CAP_SYS_ADMIN))
1050 GOTO(out_quotactl, rc = -EPERM);
1052 /* XXX: dqb_valid is borrowed as a flag to mark that
1053 * only mds quota is wanted */
1054 if (qctl->qc_dqblk.dqb_valid)
1055 qctl->obd_uuid = sbi->ll_md_exp->exp_obd->
1056 u.cli.cl_target_uuid;
1061 CERROR("unsupported quotactl op: %#x\n", cmd);
1062 GOTO(out_quotactl, rc = -ENOTTY);
1065 QCTL_COPY(oqctl, qctl);
1067 if (qctl->obd_uuid.uuid[0]) {
1068 struct obd_device *obd;
1069 struct obd_uuid *uuid = &qctl->obd_uuid;
1071 obd = class_find_client_notype(uuid,
1072 &sbi->ll_dt_exp->exp_obd->obd_uuid);
1074 GOTO(out_quotactl, rc = -ENOENT);
1076 if (cmd == Q_GETINFO)
1077 oqctl->qc_cmd = Q_GETOINFO;
1078 else if (cmd == Q_GETQUOTA)
1079 oqctl->qc_cmd = Q_GETOQUOTA;
1081 GOTO(out_quotactl, rc = -EINVAL);
1083 if (sbi->ll_md_exp->exp_obd == obd) {
1084 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1087 struct obd_export *exp;
1088 struct lov_obd *lov = &sbi->ll_dt_exp->
1091 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1092 if (!lov->lov_tgts[i] ||
1093 !lov->lov_tgts[i]->ltd_active)
1095 exp = lov->lov_tgts[i]->ltd_exp;
1096 if (exp->exp_obd == obd) {
1097 rc = obd_quotactl(exp, oqctl);
1103 oqctl->qc_cmd = cmd;
1104 QCTL_COPY(qctl, oqctl);
1106 if (copy_to_user((void *)arg, qctl, sizeof(*qctl)))
1109 GOTO(out_quotactl, rc);
1112 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1113 if (rc && rc != -EBUSY && cmd == Q_QUOTAON) {
1114 oqctl->qc_cmd = Q_QUOTAOFF;
1115 obd_quotactl(sbi->ll_md_exp, oqctl);
1118 QCTL_COPY(qctl, oqctl);
1120 if (copy_to_user((void *)arg, qctl, sizeof(*qctl)))
1124 OBD_FREE_PTR(oqctl);
1127 #endif /* HAVE_QUOTA_SUPPORT */
1128 case OBD_IOC_GETNAME: {
1129 struct obd_device *obd = class_exp2obd(sbi->ll_dt_exp);
1132 if (copy_to_user((void *)arg, obd->obd_name,
1133 strlen(obd->obd_name) + 1))
1137 case LL_IOC_FLUSHCTX:
1138 RETURN(ll_flush_ctx(inode));
1139 case LL_IOC_GETFACL: {
1140 struct rmtacl_ioctl_data ioc;
1142 if (copy_from_user(&ioc, (void *)arg, sizeof(ioc)))
1145 RETURN(ll_ioctl_getfacl(inode, &ioc));
1147 case LL_IOC_SETFACL: {
1148 struct rmtacl_ioctl_data ioc;
1150 if (copy_from_user(&ioc, (void *)arg, sizeof(ioc)))
1153 RETURN(ll_ioctl_setfacl(inode, &ioc));
1156 RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp,0,NULL,(void *)arg));
1160 int ll_dir_open(struct inode *inode, struct file *file)
1163 RETURN(ll_file_open(inode, file));
1166 int ll_dir_release(struct inode *inode, struct file *file)
1169 RETURN(ll_file_release(inode, file));
1172 struct file_operations ll_dir_operations = {
1173 .open = ll_dir_open,
1174 .release = ll_dir_release,
1175 .read = generic_read_dir,
1176 .readdir = ll_readdir,
1177 .ioctl = ll_dir_ioctl