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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/liblustre/file.c
38 * Lustre Light file operations
41 #define DEBUG_SUBSYSTEM S_LLITE
47 #include <sys/types.h>
49 #include <sys/queue.h>
52 #include "llite_lib.h"
54 /* Pack the required supplementary groups into the supplied groups array.
55 * If we don't need to use the groups from the target inode(s) then we
56 * instead pack one or more groups from the user's supplementary group
57 * array in case it might be useful. Not needed if doing an MDS-side upcall. */
58 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
61 LASSERT(suppgids != NULL);
63 if (cfs_curproc_is_in_groups(i1->i_stbuf.st_gid))
64 suppgids[0] = i1->i_stbuf.st_gid;
69 if (cfs_curproc_is_in_groups(i2->i_stbuf.st_gid))
70 suppgids[1] = i2->i_stbuf.st_gid;
78 void llu_prep_md_op_data(struct md_op_data *op_data, struct inode *i1,
79 struct inode *i2, const char *name, int namelen,
82 LASSERT(i1 != NULL || i2 != NULL);
86 ll_i2gids(op_data->op_suppgids, i1, i2);
87 op_data->op_fid1 = *ll_inode2fid(i1);
89 ll_i2gids(op_data->op_suppgids, i2, i1);
90 op_data->op_fid1 = *ll_inode2fid(i2);
94 op_data->op_fid2 = *ll_inode2fid(i2);
96 fid_zero(&op_data->op_fid2);
98 op_data->op_opc = opc;
99 op_data->op_name = name;
100 op_data->op_mode = mode;
101 op_data->op_namelen = namelen;
102 op_data->op_mod_time = CFS_CURRENT_TIME;
103 op_data->op_data = NULL;
106 void obdo_refresh_inode(struct inode *dst,
110 struct intnl_stat *st = llu_i2stat(dst);
111 valid &= src->o_valid;
113 if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
114 CDEBUG(D_INODE,"valid "LPX64", cur time "CFS_TIME_T"/"CFS_TIME_T
116 src->o_valid, LTIME_S(st->st_mtime),
117 LTIME_S(st->st_ctime),
118 (long)src->o_mtime, (long)src->o_ctime);
120 if (valid & OBD_MD_FLATIME && src->o_atime > LTIME_S(st->st_atime))
121 LTIME_S(st->st_atime) = src->o_atime;
122 if (valid & OBD_MD_FLMTIME && src->o_mtime > LTIME_S(st->st_mtime))
123 LTIME_S(st->st_mtime) = src->o_mtime;
124 if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(st->st_ctime))
125 LTIME_S(st->st_ctime) = src->o_ctime;
126 if (valid & OBD_MD_FLSIZE && src->o_size > st->st_size)
127 st->st_size = src->o_size;
128 /* optimum IO size */
129 if (valid & OBD_MD_FLBLKSZ)
130 st->st_blksize = src->o_blksize;
131 /* allocation of space */
132 if (valid & OBD_MD_FLBLOCKS && src->o_blocks > st->st_blocks)
133 st->st_blocks = src->o_blocks;
137 * Assign an obtained @ioepoch to client's inode. No lock is needed, MDS does
138 * not believe attributes if a few ioepoch holders exist. Attributes for
139 * previous ioepoch if new one is opened are also skipped by MDS.
141 void llu_ioepoch_open(struct llu_inode_info *lli, __u64 ioepoch)
143 if (ioepoch && lli->lli_ioepoch != ioepoch) {
144 lli->lli_ioepoch = ioepoch;
145 CDEBUG(D_INODE, "Epoch "LPU64" opened on "DFID" for truncate\n",
146 ioepoch, PFID(&lli->lli_fid));
150 int llu_local_open(struct llu_inode_info *lli, struct lookup_intent *it)
152 struct ptlrpc_request *req = it->d.lustre.it_data;
153 struct ll_file_data *fd;
154 struct mdt_body *body;
157 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
158 LASSERT(body != NULL);
160 /* already opened? */
161 if (lli->lli_open_count++)
164 LASSERT(!lli->lli_file_data);
166 OBD_ALLOC(fd, sizeof(*fd));
167 /* We can't handle this well without reorganizing ll_file_open and
168 * ll_md_close, so don't even try right now. */
171 memcpy(&fd->fd_mds_och.och_fh, &body->handle, sizeof(body->handle));
172 fd->fd_mds_och.och_magic = OBD_CLIENT_HANDLE_MAGIC;
173 fd->fd_mds_och.och_fid = lli->lli_fid;
174 lli->lli_file_data = fd;
175 llu_ioepoch_open(lli, body->ioepoch);
176 md_set_open_replay_data(lli->lli_sbi->ll_md_exp,
177 &fd->fd_mds_och, it->d.lustre.it_data);
182 int llu_iop_open(struct pnode *pnode, int flags, mode_t mode)
184 struct inode *inode = pnode->p_base->pb_ino;
185 struct llu_inode_info *lli = llu_i2info(inode);
186 struct intnl_stat *st = llu_i2stat(inode);
187 struct ptlrpc_request *request;
188 struct lookup_intent *it;
192 liblustre_wait_event(0);
194 /* don't do anything for '/' */
195 if (llu_is_root_inode(inode))
198 CDEBUG(D_VFSTRACE, "VFS Op:inode=%llu\n", (long long)st->st_ino);
199 LL_GET_INTENT(inode, it);
201 if (!it->d.lustre.it_disposition) {
205 rc = it_open_error(DISP_OPEN_OPEN, it);
207 GOTO(out_release, rc);
209 rc = llu_local_open(lli, it);
213 if (!S_ISREG(st->st_mode))
214 GOTO(out_release, rc = 0);
216 if (lli->lli_has_smd)
217 flags &= ~O_LOV_DELAY_CREATE;
218 /*XXX: open_flags are overwritten and the previous ones are lost */
219 lli->lli_open_flags = flags & ~(O_CREAT | O_EXCL | O_TRUNC);
222 request = it->d.lustre.it_data;
223 ptlrpc_req_finished(request);
225 it->it_op_release(it);
226 OBD_FREE(it, sizeof(*it));
228 /* libsysio hasn't done anything for O_TRUNC. here we
229 * simply simulate it as open(...); truncate(...); */
230 if (rc == 0 && (flags & O_TRUNC) && S_ISREG(st->st_mode)) {
233 memset(&attr, 0, sizeof(attr));
235 attr.ia_valid |= ATTR_SIZE | ATTR_RAW;
236 rc = llu_setattr_raw(inode, &attr);
238 CERROR("error %d truncate in open()\n", rc);
241 liblustre_wait_event(0);
245 int llu_objects_destroy(struct ptlrpc_request *req, struct inode *dir)
247 struct mdt_body *body;
248 struct lov_mds_md *eadata;
249 struct lov_stripe_md *lsm = NULL;
250 struct obd_trans_info oti = { 0 };
255 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
257 if (!(body->valid & OBD_MD_FLEASIZE))
260 if (body->eadatasize == 0) {
261 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
262 GOTO(out, rc = -EPROTO);
265 /* The MDS sent back the EA because we unlinked the last reference
266 * to this file. Use this EA to unlink the objects on the OST.
267 * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
268 * check it is complete and sensible. */
269 eadata = req_capsule_server_sized_get(&req->rq_pill, &RMF_MDT_MD,
272 LASSERT(eadata != NULL);
274 rc = obd_unpackmd(llu_i2obdexp(dir), &lsm, eadata,body->eadatasize);
276 CERROR("obd_unpackmd: %d\n", rc);
279 LASSERT(rc >= sizeof(*lsm));
283 GOTO(out_free_memmd, rc = -ENOMEM);
285 oa->o_id = lsm->lsm_object_id;
286 oa->o_seq = lsm->lsm_object_seq;
287 oa->o_mode = body->mode & S_IFMT;
288 oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
289 obdo_set_parent_fid(oa, &llu_i2info(dir)->lli_fid);
290 if (body->valid & OBD_MD_FLCOOKIE) {
291 oa->o_valid |= OBD_MD_FLCOOKIE;
293 req_capsule_server_sized_get(&req->rq_pill,
295 sizeof(struct llog_cookie) *
296 lsm->lsm_stripe_count);
297 if (oti.oti_logcookies == NULL) {
298 oa->o_valid &= ~OBD_MD_FLCOOKIE;
299 body->valid &= ~OBD_MD_FLCOOKIE;
303 rc = obd_destroy(NULL, llu_i2obdexp(dir), oa, lsm, &oti, NULL, NULL);
306 CERROR("obd destroy objid 0x"LPX64" error %d\n",
307 lsm->lsm_object_id, rc);
309 obd_free_memmd(llu_i2obdexp(dir), &lsm);
314 /** Cliens updates SOM attributes on MDS: obd_getattr and md_setattr. */
315 int llu_som_update(struct inode *inode, struct md_op_data *op_data)
317 struct llu_inode_info *lli = llu_i2info(inode);
318 struct llu_sb_info *sbi = llu_i2sbi(inode);
319 struct obdo oa = { 0 };
324 LASSERT(!(lli->lli_flags & LLIF_MDS_SIZE_LOCK));
325 LASSERT(sbi->ll_lco.lco_flags & OBD_CONNECT_SOM);
327 old_flags = op_data->op_flags;
328 op_data->op_flags = MF_SOM_CHANGE;
330 /* If inode is already in another epoch, skip getattr from OSTs. */
331 if (lli->lli_ioepoch == op_data->op_ioepoch) {
332 rc = llu_inode_getattr(inode, &oa, op_data->op_ioepoch,
333 old_flags & MF_GETATTR_LOCK);
337 CERROR("inode_getattr failed (%d): unable to "
338 "send a Size-on-MDS attribute update "
339 "for inode %llu/%lu\n", rc,
340 (long long)llu_i2stat(inode)->st_ino,
341 lli->lli_st_generation);
343 CDEBUG(D_INODE, "Size-on-MDS update on "DFID"\n",
344 PFID(&lli->lli_fid));
347 /* Install attributes into op_data. */
348 md_from_obdo(op_data, &oa, oa.o_valid);
351 rc = llu_md_setattr(inode, op_data, NULL);
355 void llu_pack_inode2opdata(struct inode *inode, struct md_op_data *op_data,
356 struct lustre_handle *fh)
358 struct llu_inode_info *lli = llu_i2info(inode);
359 struct intnl_stat *st = llu_i2stat(inode);
362 op_data->op_fid1 = lli->lli_fid;
363 op_data->op_attr.ia_atime = st->st_atime;
364 op_data->op_attr.ia_mtime = st->st_mtime;
365 op_data->op_attr.ia_ctime = st->st_ctime;
366 op_data->op_attr.ia_size = st->st_size;
367 op_data->op_attr_blocks = st->st_blocks;
368 op_data->op_attr.ia_attr_flags = lli->lli_st_flags;
369 op_data->op_ioepoch = lli->lli_ioepoch;
371 op_data->op_handle = *fh;
375 /** Pack SOM attributes info @opdata for CLOSE, DONE_WRITING rpc. */
376 void llu_done_writing_attr(struct inode *inode, struct md_op_data *op_data)
378 struct llu_inode_info *lli = llu_i2info(inode);
381 op_data->op_flags |= MF_SOM_CHANGE;
383 /* Pack Size-on-MDS attributes if we are in IO
384 * epoch and attributes are valid. */
385 LASSERT(!(lli->lli_flags & LLIF_MDS_SIZE_LOCK));
386 if (!cl_local_size(inode))
387 op_data->op_attr.ia_valid |= ATTR_MTIME_SET | ATTR_CTIME_SET |
388 ATTR_ATIME_SET | ATTR_SIZE | ATTR_BLOCKS;
393 static void llu_prepare_close(struct inode *inode, struct md_op_data *op_data,
394 struct ll_file_data *fd)
396 struct obd_client_handle *och = &fd->fd_mds_och;
398 op_data->op_attr.ia_valid = ATTR_MODE | ATTR_ATIME_SET |
399 ATTR_MTIME_SET | ATTR_CTIME_SET;
401 if (fd->fd_flags & FMODE_WRITE) {
402 struct llu_sb_info *sbi = llu_i2sbi(inode);
403 if (!(sbi->ll_lco.lco_flags & OBD_CONNECT_SOM) ||
404 !S_ISREG(llu_i2stat(inode)->st_mode)) {
405 op_data->op_attr.ia_valid |= ATTR_SIZE | ATTR_BLOCKS;
407 /* Inode cannot be dirty. Close the epoch. */
408 op_data->op_flags |= MF_EPOCH_CLOSE;
409 /* XXX: Send SOM attributes only if they are really
411 llu_done_writing_attr(inode, op_data);
414 llu_pack_inode2opdata(inode, op_data, &och->och_fh);
415 llu_prep_md_op_data(op_data, inode, NULL, NULL,
416 0, 0, LUSTRE_OPC_ANY);
419 int llu_md_close(struct obd_export *md_exp, struct inode *inode)
421 struct llu_inode_info *lli = llu_i2info(inode);
422 struct ll_file_data *fd = lli->lli_file_data;
423 struct ptlrpc_request *req = NULL;
424 struct obd_client_handle *och = &fd->fd_mds_och;
425 struct intnl_stat *st = llu_i2stat(inode);
426 struct md_op_data op_data = { { 0 } };
430 /* clear group lock, if present */
431 if (fd->fd_flags & LL_FILE_GROUP_LOCKED)
432 llu_put_grouplock(inode, fd->fd_grouplock.cg_gid);
434 llu_prepare_close(inode, &op_data, fd);
435 rc = md_close(md_exp, &op_data, och->och_mod, &req);
437 /* We are the last writer, so the MDS has instructed us to get
438 * the file size and any write cookies, then close again. */
439 LASSERT(lli->lli_open_flags & FMODE_WRITE);
440 rc = llu_som_update(inode, &op_data);
442 CERROR("inode %llu mdc Size-on-MDS update failed: "
443 "rc = %d\n", (long long)st->st_ino, rc);
447 CERROR("inode %llu close failed: rc %d\n",
448 (long long)st->st_ino, rc);
450 rc = llu_objects_destroy(req, inode);
452 CERROR("inode %llu ll_objects destroy: rc = %d\n",
453 (long long)st->st_ino, rc);
456 md_clear_open_replay_data(md_exp, och);
457 ptlrpc_req_finished(req);
458 och->och_fh.cookie = DEAD_HANDLE_MAGIC;
459 lli->lli_file_data = NULL;
460 OBD_FREE(fd, sizeof(*fd));
465 int llu_file_release(struct inode *inode)
467 struct ll_file_data *fd;
468 struct llu_sb_info *sbi = llu_i2sbi(inode);
469 struct llu_inode_info *lli = llu_i2info(inode);
473 CDEBUG(D_VFSTRACE, "VFS Op:inode=%llu/%lu\n",
474 (long long)llu_i2stat(inode)->st_ino, lli->lli_st_generation);
476 if (llu_is_root_inode(inode))
479 /* still opened by others? */
480 if (--lli->lli_open_count)
483 fd = lli->lli_file_data;
484 if (!fd) /* no process opened the file after an mcreate */
487 rc2 = llu_md_close(sbi->ll_md_exp, inode);
495 * libsysio require us return 0
497 int llu_iop_close(struct inode *inode)
501 liblustre_wait_event(0);
503 rc = llu_file_release(inode);
505 CERROR("file close error %d\n", rc);
507 /* if open count == 0 && stale_flag is set, should we
508 * remove the inode immediately? */
509 liblustre_wait_idle();
513 _SYSIO_OFF_T llu_iop_pos(struct inode *ino, _SYSIO_OFF_T off)
517 liblustre_wait_event(0);
519 if (off < 0 || off > ll_file_maxbytes(ino))