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 #ifdef HAVE_PG_FS_MISC
133 #define PageChecked(page) test_bit(PG_fs_misc, &(page)->flags)
134 #define SetPageChecked(page) set_bit(PG_fs_misc, &(page)->flags)
137 /* returns the page unlocked, but with a reference */
138 static int ll_dir_readpage(struct file *file, struct page *page)
140 struct inode *inode = page->mapping->host;
141 struct ptlrpc_request *request;
142 struct mdt_body *body;
148 hash = hash_x_index(page->index);
149 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) off %lu\n",
150 inode->i_ino, inode->i_generation, inode, (unsigned long)hash);
152 oc = ll_mdscapa_get(inode);
153 rc = md_readpage(ll_i2sbi(inode)->ll_md_exp, ll_inode2fid(inode),
154 oc, hash, page, &request);
157 body = lustre_msg_buf(request->rq_repmsg, REPLY_REC_OFF,
159 /* Checked by mdc_readpage() */
160 LASSERT(body != NULL);
162 /* Swabbed by mdc_readpage() */
163 LASSERT(lustre_rep_swabbed(request, REPLY_REC_OFF));
165 if (body->valid & OBD_MD_FLSIZE) {
166 ll_inode_size_lock(inode, 0);
167 i_size_write(inode, body->size);
168 ll_inode_size_unlock(inode, 0);
170 SetPageUptodate(page);
172 ptlrpc_req_finished(request);
179 struct address_space_operations ll_dir_aops = {
180 .readpage = ll_dir_readpage,
183 static inline unsigned long dir_pages(struct inode *inode)
185 return (i_size_read(inode) + CFS_PAGE_SIZE - 1) >> CFS_PAGE_SHIFT;
188 static inline unsigned ll_chunk_size(struct inode *inode)
190 return inode->i_sb->s_blocksize;
193 static void ll_check_page(struct inode *dir, struct page *page)
195 /* XXX: check page format later */
196 SetPageChecked(page);
199 static inline void ll_put_page(struct page *page)
202 page_cache_release(page);
206 * Find, kmap and return page that contains given hash.
208 static struct page *ll_dir_page_locate(struct inode *dir, unsigned long hash,
209 __u32 *start, __u32 *end)
211 struct address_space *mapping = dir->i_mapping;
213 * Complement of hash is used as an index so that
214 * radix_tree_gang_lookup() can be used to find a page with starting
215 * hash _smaller_ than one we are looking for.
217 unsigned long offset = hash_x_index(hash);
221 TREE_READ_LOCK_IRQ(mapping);
222 found = radix_tree_gang_lookup(&mapping->page_tree,
223 (void **)&page, offset, 1);
225 struct lu_dirpage *dp;
227 page_cache_get(page);
228 TREE_READ_UNLOCK_IRQ(mapping);
230 * In contrast to find_lock_page() we are sure that directory
231 * page cannot be truncated (while DLM lock is held) and,
232 * hence, can avoid restart.
234 * In fact, page cannot be locked here at all, because
235 * ll_dir_readpage() does synchronous io.
238 if (PageUptodate(page)) {
240 *start = le32_to_cpu(dp->ldp_hash_start);
241 *end = le32_to_cpu(dp->ldp_hash_end);
242 LASSERT(*start <= hash);
243 if (hash > *end || (*end != *start && hash == *end)) {
246 ll_truncate_complete_page(page);
248 page_cache_release(page);
252 page_cache_release(page);
253 page = ERR_PTR(-EIO);
257 TREE_READ_UNLOCK_IRQ(mapping);
263 static struct page *ll_get_dir_page(struct inode *dir, __u32 hash, int exact,
264 struct ll_dir_chain *chain)
266 ldlm_policy_data_t policy = {.l_inodebits = {MDS_INODELOCK_UPDATE} };
267 struct address_space *mapping = dir->i_mapping;
268 struct lustre_handle lockh;
269 struct lu_dirpage *dp;
277 rc = md_lock_match(ll_i2sbi(dir)->ll_md_exp, LDLM_FL_BLOCK_GRANTED,
278 ll_inode2fid(dir), LDLM_IBITS, &policy, mode, &lockh);
280 struct ldlm_enqueue_info einfo = { LDLM_IBITS, mode,
281 ll_md_blocking_ast, ldlm_completion_ast, NULL, dir };
282 struct lookup_intent it = { .it_op = IT_READDIR };
283 struct ptlrpc_request *request;
284 struct md_op_data *op_data;
286 op_data = ll_prep_md_op_data(NULL, dir, NULL, NULL, 0, 0,
287 LUSTRE_OPC_ANY, NULL);
289 return (void *)op_data;
291 rc = md_enqueue(ll_i2sbi(dir)->ll_md_exp, &einfo, &it,
292 op_data, &lockh, NULL, 0, 0);
294 ll_finish_md_op_data(op_data);
296 request = (struct ptlrpc_request *)it.d.lustre.it_data;
298 ptlrpc_req_finished(request);
300 CERROR("lock enqueue: rc: %d\n", rc);
304 /* for cross-ref object, l_ast_data of the lock may not be set,
305 * we reset it here */
306 md_set_lock_data(ll_i2sbi(dir)->ll_md_exp, &lockh.cookie, dir);
308 ldlm_lock_dump_handle(D_OTHER, &lockh);
310 page = ll_dir_page_locate(dir, hash, &start, &end);
312 GOTO(out_unlock, page);
316 * XXX nikita: not entirely correct handling of a corner case:
317 * suppose hash chain of entries with hash value HASH crosses
318 * border between pages P0 and P1. First both P0 and P1 are
319 * cached, seekdir() is called for some entry from the P0 part
320 * of the chain. Later P0 goes out of cache. telldir(HASH)
321 * happens and finds P1, as it starts with matching hash
322 * value. Remaining entries from P0 part of the chain are
323 * skipped. (Is that really a bug?)
325 * Possible solutions: 0. don't cache P1 is such case, handle
326 * it as an "overflow" page. 1. invalidate all pages at
327 * once. 2. use HASH|1 as an index for P1.
329 if (exact && hash != start) {
331 * readdir asked for a page starting _exactly_ from
332 * given hash, but cache contains stale page, with
333 * entries with smaller hash values. Stale page should
334 * be invalidated, and new one fetched.
336 CWARN("Stale readpage page %p: %#lx != %#lx\n", page,
337 (unsigned long)hash, (unsigned long)start);
339 ll_truncate_complete_page(page);
341 page_cache_release(page);
343 GOTO(hash_collision, page);
346 page = read_cache_page(mapping, hash_x_index(hash),
347 (filler_t*)mapping->a_ops->readpage, NULL);
349 GOTO(out_unlock, page);
353 if (!PageUptodate(page))
355 if (!PageChecked(page))
356 ll_check_page(dir, page);
360 dp = page_address(page);
362 start = le32_to_cpu(dp->ldp_hash_start);
363 end = le32_to_cpu(dp->ldp_hash_end);
365 LASSERT(start == hash);
366 CWARN("Page-wide hash collision: %#lx\n", (unsigned long)end);
368 * Fetch whole overflow chain...
375 ldlm_lock_decref(&lockh, mode);
380 page = ERR_PTR(-EIO);
384 int ll_readdir(struct file *filp, void *cookie, filldir_t filldir)
386 struct inode *inode = filp->f_dentry->d_inode;
387 struct ll_inode_info *info = ll_i2info(inode);
388 struct ll_sb_info *sbi = ll_i2sbi(inode);
389 __u32 pos = filp->f_pos;
391 struct ll_dir_chain chain;
397 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) pos %lu/%llu\n",
398 inode->i_ino, inode->i_generation, inode,
399 (unsigned long)pos, i_size_read(inode));
401 if (pos == DIR_END_OFF)
410 ll_dir_chain_init(&chain);
412 page = ll_get_dir_page(inode, pos, 0, &chain);
414 while (rc == 0 && !done) {
415 struct lu_dirpage *dp;
416 struct lu_dirent *ent;
420 * If page is empty (end of directoryis reached),
423 __u32 hash = DIR_END_OFF;
426 dp = page_address(page);
427 for (ent = lu_dirent_start(dp); ent != NULL && !done;
428 ent = lu_dirent_next(ent)) {
435 * XXX: implement correct swabbing here.
438 hash = le32_to_cpu(ent->lde_hash);
439 namelen = le16_to_cpu(ent->lde_namelen);
443 * Skip until we find target hash
455 name = ent->lde_name;
456 fid_le_to_cpu(&fid, &fid);
457 ino = ll_fid_build_ino(sbi, &fid);
459 done = filldir(cookie, name, namelen,
460 (loff_t)hash, ino, DT_UNKNOWN);
462 next = le32_to_cpu(dp->ldp_hash_end);
466 if (pos == DIR_END_OFF)
468 * End of directory reached.
471 else if (1 /* chain is exhausted*/)
473 * Normal case: continue to the next
476 page = ll_get_dir_page(inode, pos, 1,
480 * go into overflow page.
487 CERROR("error reading dir "DFID" at %lu: rc %d\n",
488 PFID(&info->lli_fid), (unsigned long)pos, rc);
492 filp->f_pos = (loff_t)(__s32)pos;
493 filp->f_version = inode->i_version;
494 touch_atime(filp->f_vfsmnt, filp->f_dentry);
496 ll_dir_chain_fini(&chain);
501 #define QCTL_COPY(out, in) \
503 Q_COPY(out, in, qc_cmd); \
504 Q_COPY(out, in, qc_type); \
505 Q_COPY(out, in, qc_id); \
506 Q_COPY(out, in, qc_stat); \
507 Q_COPY(out, in, qc_dqinfo); \
508 Q_COPY(out, in, qc_dqblk); \
511 int ll_send_mgc_param(struct obd_export *mgc, char *string)
513 struct mgs_send_param *msp;
520 strncpy(msp->mgs_param, string, MGS_PARAM_MAXLEN);
521 rc = obd_set_info_async(mgc, strlen(KEY_SET_INFO), KEY_SET_INFO,
522 sizeof(struct mgs_send_param), msp, NULL);
524 CERROR("Failed to set parameter: %d\n", rc);
530 char *ll_get_fsname(struct inode *inode)
532 struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
536 OBD_ALLOC(fsname, MGS_PARAM_MAXLEN);
537 len = strlen(lsi->lsi_lmd->lmd_profile);
538 ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
539 if (ptr && (strcmp(ptr, "-client") == 0))
541 strncpy(fsname, lsi->lsi_lmd->lmd_profile, len);
547 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
550 struct ll_sb_info *sbi = ll_i2sbi(inode);
551 struct md_op_data *op_data;
552 struct ptlrpc_request *req = NULL;
554 struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
555 struct obd_device *mgc = lsi->lsi_mgc;
556 char *fsname = NULL, *param = NULL;
559 * This is coming from userspace, so should be in
560 * local endian. But the MDS would like it in little
561 * endian, so we swab it before we send it.
563 if (lump->lmm_magic != LOV_USER_MAGIC)
566 if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC))
567 lustre_swab_lov_user_md(lump);
569 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
570 LUSTRE_OPC_ANY, NULL);
572 RETURN(PTR_ERR(op_data));
574 /* swabbing is done in lov_setstripe() on server side */
575 rc = md_setattr(sbi->ll_md_exp, op_data, lump, sizeof(*lump),
576 NULL, 0, &req, NULL);
577 ll_finish_md_op_data(op_data);
578 ptlrpc_req_finished(req);
580 if (rc != -EPERM && rc != -EACCES)
581 CERROR("mdc_setattr fails: rc = %d\n", rc);
584 if (set_default && mgc->u.cli.cl_mgc_mgsexp) {
585 OBD_ALLOC(param, MGS_PARAM_MAXLEN);
587 /* Get fsname and assume devname to be -MDT0000. */
588 fsname = ll_get_fsname(inode);
589 /* Set root stripesize */
590 sprintf(param, "%s-MDT0000.lov.stripesize=%u", fsname,
591 lump->lmm_stripe_size);
592 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
596 /* Set root stripecount */
597 sprintf(param, "%s-MDT0000.lov.stripecount=%u", fsname,
598 lump->lmm_stripe_count);
599 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
603 /* Set root stripeoffset */
604 sprintf(param, "%s-MDT0000.lov.stripeoffset=%u", fsname,
605 lump->lmm_stripe_offset);
606 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
611 OBD_FREE(fsname, MGS_PARAM_MAXLEN);
613 OBD_FREE(param, MGS_PARAM_MAXLEN);
618 int ll_dir_getstripe(struct inode *inode, struct lov_mds_md **lmmp,
619 int *lmm_size, struct ptlrpc_request **request)
621 struct ll_sb_info *sbi = ll_i2sbi(inode);
622 struct mdt_body *body;
623 struct lov_mds_md *lmm = NULL;
624 struct ptlrpc_request *req = NULL;
628 rc = ll_get_max_mdsize(sbi, &lmmsize);
632 oc = ll_mdscapa_get(inode);
633 rc = md_getattr(sbi->ll_md_exp, ll_inode2fid(inode),
634 oc, OBD_MD_FLEASIZE | OBD_MD_FLDIREA,
638 CDEBUG(D_INFO, "md_getattr failed on inode "
639 "%lu/%u: rc %d\n", inode->i_ino,
640 inode->i_generation, rc);
644 body = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF, sizeof(*body));
645 LASSERT(body != NULL); /* checked by md_getattr_name */
646 /* swabbed by mdc_getattr_name */
647 LASSERT(lustre_rep_swabbed(req, REPLY_REC_OFF));
649 lmmsize = body->eadatasize;
651 if (!(body->valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
653 GOTO(out, rc = -ENODATA);
656 lmm = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF + 1, lmmsize);
657 LASSERT(lmm != NULL);
658 LASSERT(lustre_rep_swabbed(req, REPLY_REC_OFF + 1));
661 * This is coming from the MDS, so is probably in
662 * little endian. We convert it to host endian before
663 * passing it to userspace.
665 if (lmm->lmm_magic == __swab32(LOV_MAGIC)) {
666 lustre_swab_lov_user_md((struct lov_user_md *)lmm);
667 lustre_swab_lov_user_md_objects((struct lov_user_md *)lmm);
676 static int ll_dir_ioctl(struct inode *inode, struct file *file,
677 unsigned int cmd, unsigned long arg)
679 struct ll_sb_info *sbi = ll_i2sbi(inode);
680 struct obd_ioctl_data *data;
683 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), cmd=%#x\n",
684 inode->i_ino, inode->i_generation, inode, cmd);
686 /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
687 if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
690 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
692 case EXT3_IOC_GETFLAGS:
693 case EXT3_IOC_SETFLAGS:
694 RETURN(ll_iocontrol(inode, file, cmd, arg));
695 case EXT3_IOC_GETVERSION_OLD:
696 case EXT3_IOC_GETVERSION:
697 RETURN(put_user(inode->i_generation, (int *)arg));
698 /* We need to special case any other ioctls we want to handle,
699 * to send them to the MDS/OST as appropriate and to properly
700 * network encode the arg field.
701 case EXT3_IOC_SETVERSION_OLD:
702 case EXT3_IOC_SETVERSION:
704 case IOC_MDC_LOOKUP: {
705 struct ptlrpc_request *request = NULL;
706 int namelen, rc, len = 0;
711 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
716 filename = data->ioc_inlbuf1;
717 namelen = data->ioc_inllen1;
720 CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
721 GOTO(out, rc = -EINVAL);
724 oc = ll_mdscapa_get(inode);
725 rc = md_getattr_name(sbi->ll_md_exp, ll_inode2fid(inode), oc,
726 filename, namelen, OBD_MD_FLID, 0,
730 CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
734 ptlrpc_req_finished(request);
738 obd_ioctl_freedata(buf, len);
741 case LL_IOC_LOV_SETSTRIPE: {
742 struct lov_user_md lum, *lump = (struct lov_user_md *)arg;
746 LASSERT(sizeof(lum) == sizeof(*lump));
747 LASSERT(sizeof(lum.lmm_objects[0]) ==
748 sizeof(lump->lmm_objects[0]));
749 rc = copy_from_user(&lum, lump, sizeof(lum));
753 if (inode->i_sb->s_root == file->f_dentry)
756 rc = ll_dir_setstripe(inode, &lum, set_default);
760 case LL_IOC_OBD_STATFS:
761 RETURN(ll_obd_statfs(inode, (void *)arg));
762 case LL_IOC_LOV_GETSTRIPE:
763 case LL_IOC_MDC_GETINFO:
764 case IOC_MDC_GETFILEINFO:
765 case IOC_MDC_GETFILESTRIPE: {
766 struct ptlrpc_request *request = NULL;
767 struct lov_user_md *lump;
768 struct lov_mds_md *lmm = NULL;
769 struct mdt_body *body;
770 char *filename = NULL;
773 if (cmd == IOC_MDC_GETFILEINFO ||
774 cmd == IOC_MDC_GETFILESTRIPE) {
775 filename = getname((const char *)arg);
776 if (IS_ERR(filename))
777 RETURN(PTR_ERR(filename));
779 rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
782 rc = ll_dir_getstripe(inode, &lmm, &lmmsize, &request);
786 body = lustre_msg_buf(request->rq_repmsg,
787 REPLY_REC_OFF, sizeof(*body));
788 LASSERT(body != NULL); /* checked by md_getattr_name */
789 /* swabbed by md_getattr_name */
790 LASSERT(lustre_rep_swabbed(request, REPLY_REC_OFF));
796 if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO ||
797 cmd == LL_IOC_MDC_GETINFO))
798 GOTO(skip_lmm, rc = 0);
803 if (cmd == IOC_MDC_GETFILESTRIPE ||
804 cmd == LL_IOC_LOV_GETSTRIPE) {
805 lump = (struct lov_user_md *)arg;
807 struct lov_user_mds_data *lmdp;
808 lmdp = (struct lov_user_mds_data *)arg;
809 lump = &lmdp->lmd_lmm;
811 rc = copy_to_user(lump, lmm, lmmsize);
813 GOTO(out_lmm, rc = -EFAULT);
815 if (cmd == IOC_MDC_GETFILEINFO || cmd == LL_IOC_MDC_GETINFO) {
816 struct lov_user_mds_data *lmdp;
819 st.st_dev = inode->i_sb->s_dev;
820 st.st_mode = body->mode;
821 st.st_nlink = body->nlink;
822 st.st_uid = body->uid;
823 st.st_gid = body->gid;
824 st.st_rdev = body->rdev;
825 st.st_size = body->size;
826 st.st_blksize = CFS_PAGE_SIZE;
827 st.st_blocks = body->blocks;
828 st.st_atime = body->atime;
829 st.st_mtime = body->mtime;
830 st.st_ctime = body->ctime;
831 st.st_ino = inode->i_ino;
833 lmdp = (struct lov_user_mds_data *)arg;
834 rc = copy_to_user(&lmdp->lmd_st, &st, sizeof(st));
836 GOTO(out_lmm, rc = -EFAULT);
841 if (lmm && lmm->lmm_magic == LOV_MAGIC_JOIN)
842 OBD_FREE(lmm, lmmsize);
844 ptlrpc_req_finished(request);
849 case IOC_LOV_GETINFO: {
850 struct lov_user_mds_data *lumd;
851 struct lov_stripe_md *lsm;
852 struct lov_user_md *lum;
853 struct lov_mds_md *lmm;
858 lumd = (struct lov_user_mds_data *)arg;
859 lum = &lumd->lmd_lmm;
861 rc = ll_get_max_mdsize(sbi, &lmmsize);
865 OBD_ALLOC(lmm, lmmsize);
866 rc = copy_from_user(lmm, lum, lmmsize);
868 GOTO(free_lmm, rc = -EFAULT);
870 rc = obd_unpackmd(sbi->ll_dt_exp, &lsm, lmm, lmmsize);
872 GOTO(free_lmm, rc = -ENOMEM);
874 rc = obd_checkmd(sbi->ll_dt_exp, sbi->ll_md_exp, lsm);
878 /* Perform glimpse_size operation. */
879 memset(&st, 0, sizeof(st));
881 rc = ll_glimpse_ioctl(sbi, lsm, &st);
885 rc = copy_to_user(&lumd->lmd_st, &st, sizeof(st));
887 GOTO(free_lsm, rc = -EFAULT);
891 obd_free_memmd(sbi->ll_dt_exp, &lsm);
893 OBD_FREE(lmm, lmmsize);
896 case OBD_IOC_LLOG_CATINFO: {
897 struct ptlrpc_request *req = NULL;
900 char *bufs[3] = { NULL }, *str;
901 int lens[3] = { sizeof(struct ptlrpc_body) };
902 int size[2] = { sizeof(struct ptlrpc_body) };
904 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
909 if (!data->ioc_inlbuf1) {
910 obd_ioctl_freedata(buf, len);
914 lens[REQ_REC_OFF] = data->ioc_inllen1;
915 bufs[REQ_REC_OFF] = data->ioc_inlbuf1;
916 if (data->ioc_inllen2) {
917 lens[REQ_REC_OFF + 1] = data->ioc_inllen2;
918 bufs[REQ_REC_OFF + 1] = data->ioc_inlbuf2;
920 lens[REQ_REC_OFF + 1] = 0;
921 bufs[REQ_REC_OFF + 1] = NULL;
924 req = ptlrpc_prep_req(sbi2mdc(sbi)->cl_import,
925 LUSTRE_LOG_VERSION, LLOG_CATINFO, 3, lens,
928 GOTO(out_catinfo, rc = -ENOMEM);
930 size[REPLY_REC_OFF] = data->ioc_plen1;
931 ptlrpc_req_set_repsize(req, 2, size);
933 rc = ptlrpc_queue_wait(req);
935 str = lustre_msg_string(req->rq_repmsg, REPLY_REC_OFF,
937 rc = copy_to_user(data->ioc_pbuf1, str, data->ioc_plen1);
939 ptlrpc_req_finished(req);
941 obd_ioctl_freedata(buf, len);
944 case OBD_IOC_QUOTACHECK: {
945 struct obd_quotactl *oqctl;
948 if (!capable(CAP_SYS_ADMIN))
951 OBD_ALLOC_PTR(oqctl);
954 oqctl->qc_type = arg;
955 rc = obd_quotacheck(sbi->ll_md_exp, oqctl);
957 CDEBUG(D_INFO, "md_quotacheck failed: rc %d\n", rc);
961 rc = obd_quotacheck(sbi->ll_dt_exp, oqctl);
963 CDEBUG(D_INFO, "obd_quotacheck failed: rc %d\n", rc);
968 case OBD_IOC_POLL_QUOTACHECK: {
969 struct if_quotacheck *check;
972 if (!capable(CAP_SYS_ADMIN))
975 OBD_ALLOC_PTR(check);
979 rc = obd_iocontrol(cmd, sbi->ll_md_exp, 0, (void *)check,
982 CDEBUG(D_QUOTA, "mdc ioctl %d failed: %d\n", cmd, rc);
983 if (copy_to_user((void *)arg, check, sizeof(*check)))
988 rc = obd_iocontrol(cmd, sbi->ll_dt_exp, 0, (void *)check,
991 CDEBUG(D_QUOTA, "osc ioctl %d failed: %d\n", cmd, rc);
992 if (copy_to_user((void *)arg, check, sizeof(*check)))
1000 #ifdef HAVE_QUOTA_SUPPORT
1001 case OBD_IOC_QUOTACTL: {
1002 struct if_quotactl *qctl;
1003 struct obd_quotactl *oqctl;
1005 int cmd, type, id, rc = 0;
1007 OBD_ALLOC_PTR(qctl);
1011 OBD_ALLOC_PTR(oqctl);
1016 if (copy_from_user(qctl, (void *)arg, sizeof(*qctl)))
1017 GOTO(out_quotactl, rc = -EFAULT);
1020 type = qctl->qc_type;
1027 if (!capable(CAP_SYS_ADMIN))
1028 GOTO(out_quotactl, rc = -EPERM);
1031 if (((type == USRQUOTA && current->euid != id) ||
1032 (type == GRPQUOTA && !in_egroup_p(id))) &&
1033 !capable(CAP_SYS_ADMIN))
1034 GOTO(out_quotactl, rc = -EPERM);
1036 /* XXX: dqb_valid is borrowed as a flag to mark that
1037 * only mds quota is wanted */
1038 if (qctl->qc_dqblk.dqb_valid)
1039 qctl->obd_uuid = sbi->ll_md_exp->exp_obd->
1040 u.cli.cl_target_uuid;
1045 CERROR("unsupported quotactl op: %#x\n", cmd);
1046 GOTO(out_quotactl, rc = -ENOTTY);
1049 QCTL_COPY(oqctl, qctl);
1051 if (qctl->obd_uuid.uuid[0]) {
1052 struct obd_device *obd;
1053 struct obd_uuid *uuid = &qctl->obd_uuid;
1055 obd = class_find_client_notype(uuid,
1056 &sbi->ll_dt_exp->exp_obd->obd_uuid);
1058 GOTO(out_quotactl, rc = -ENOENT);
1060 if (cmd == Q_GETINFO)
1061 oqctl->qc_cmd = Q_GETOINFO;
1062 else if (cmd == Q_GETQUOTA)
1063 oqctl->qc_cmd = Q_GETOQUOTA;
1065 GOTO(out_quotactl, rc = -EINVAL);
1067 if (sbi->ll_md_exp->exp_obd == obd) {
1068 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1071 struct obd_export *exp;
1072 struct lov_obd *lov = &sbi->ll_dt_exp->
1075 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1076 if (!lov->lov_tgts[i] ||
1077 !lov->lov_tgts[i]->ltd_active)
1079 exp = lov->lov_tgts[i]->ltd_exp;
1080 if (exp->exp_obd == obd) {
1081 rc = obd_quotactl(exp, oqctl);
1087 oqctl->qc_cmd = cmd;
1088 QCTL_COPY(qctl, oqctl);
1090 if (copy_to_user((void *)arg, qctl, sizeof(*qctl)))
1093 GOTO(out_quotactl, rc);
1096 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1097 if (rc && rc != -EBUSY && cmd == Q_QUOTAON) {
1098 oqctl->qc_cmd = Q_QUOTAOFF;
1099 obd_quotactl(sbi->ll_md_exp, oqctl);
1102 QCTL_COPY(qctl, oqctl);
1104 if (copy_to_user((void *)arg, qctl, sizeof(*qctl)))
1108 OBD_FREE_PTR(oqctl);
1111 #endif /* HAVE_QUOTA_SUPPORT */
1112 case OBD_IOC_GETNAME: {
1113 struct obd_device *obd = class_exp2obd(sbi->ll_dt_exp);
1116 if (copy_to_user((void *)arg, obd->obd_name,
1117 strlen(obd->obd_name) + 1))
1121 case LL_IOC_FLUSHCTX:
1122 RETURN(ll_flush_ctx(inode));
1123 case LL_IOC_GETFACL: {
1124 struct rmtacl_ioctl_data ioc;
1126 if (copy_from_user(&ioc, (void *)arg, sizeof(ioc)))
1129 RETURN(ll_ioctl_getfacl(inode, &ioc));
1131 case LL_IOC_SETFACL: {
1132 struct rmtacl_ioctl_data ioc;
1134 if (copy_from_user(&ioc, (void *)arg, sizeof(ioc)))
1137 RETURN(ll_ioctl_setfacl(inode, &ioc));
1140 RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp,0,NULL,(void *)arg));
1144 int ll_dir_open(struct inode *inode, struct file *file)
1147 RETURN(ll_file_open(inode, file));
1150 int ll_dir_release(struct inode *inode, struct file *file)
1153 RETURN(ll_file_release(inode, file));
1156 struct file_operations ll_dir_operations = {
1157 .open = ll_dir_open,
1158 .release = ll_dir_release,
1159 .read = generic_read_dir,
1160 .readdir = ll_readdir,
1161 .ioctl = ll_dir_ioctl