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, 2013, 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/rw.c
38 * Lustre Light block IO
41 #define DEBUG_SUBSYSTEM S_LLITE
47 #include <sys/types.h>
49 #include <sys/queue.h>
53 #include "llite_lib.h"
55 typedef ssize_t llu_file_piov_t(const struct iovec *iovec, int iovlen,
56 _SYSIO_OFF_T pos, ssize_t len,
59 size_t llap_cookie_size;
61 static int llu_lock_to_stripe_offset(struct obd_export *exp,
62 struct lov_stripe_md *lsm,
63 struct ldlm_lock *lock)
67 struct ldlm_lock *lock;
68 } key = { .name = KEY_LOCK_TO_STRIPE, .lock = lock };
69 __u32 stripe, vallen = sizeof(stripe);
73 if (lsm == NULL || lsm->lsm_stripe_count == 1)
76 /* get our offset in the lov */
77 rc = obd_get_info(NULL, exp, sizeof(key), &key, &vallen, &stripe, lsm);
79 CERROR("obd_get_info: rc = %d\n", rc);
82 LASSERT(stripe < lsm->lsm_stripe_count);
86 int llu_extent_lock_cancel_cb(struct ldlm_lock *lock,
87 struct ldlm_lock_desc *new, void *data,
90 struct lustre_handle lockh = { 0 };
94 if ((unsigned long)data > 0 && (unsigned long)data < 0x1000) {
95 LDLM_ERROR(lock, "cancelling lock with bad data %p", data);
100 case LDLM_CB_BLOCKING:
101 ldlm_lock2handle(lock, &lockh);
102 rc = ldlm_cli_cancel(&lockh, 0);
104 CERROR("ldlm_cli_cancel failed: %d\n", rc);
106 case LDLM_CB_CANCELING: {
108 struct llu_inode_info *lli;
109 struct lov_stripe_md *lsm;
113 /* This lock wasn't granted, don't try to evict pages */
114 if (lock->l_req_mode != lock->l_granted_mode)
117 inode = llu_inode_from_lock(lock);
120 lli= llu_i2info(inode);
123 if (!lli->lli_has_smd)
126 lsm = ccc_inode_lsm_get(inode);
130 stripe = llu_lock_to_stripe_offset(llu_i2obdexp(inode),
132 lock_res_and_lock(lock);
133 kms = ldlm_extent_shift_kms(lock,
134 lsm->lsm_oinfo[stripe]->loi_kms);
135 unlock_res_and_lock(lock);
136 if (lsm->lsm_oinfo[stripe]->loi_kms != kms)
137 LDLM_DEBUG(lock, "updating kms from "LPU64" to "LPU64,
138 lsm->lsm_oinfo[stripe]->loi_kms, kms);
139 loi_kms_set(lsm->lsm_oinfo[stripe], kms);
140 ccc_inode_lsm_put(inode, lsm);
152 int llu_merge_lvb(const struct lu_env *env, struct inode *inode)
154 struct llu_inode_info *lli = llu_i2info(inode);
155 struct cl_object *obj = lli->lli_clob;
156 struct intnl_stat *st = llu_i2stat(inode);
157 struct cl_attr *attr = ccc_env_thread_attr(env);
162 /* merge timestamps the most recently obtained from mds with
163 timestamps obtained from osts */
164 LTIME_S(inode->i_atime) = lli->lli_lvb.lvb_atime;
165 LTIME_S(inode->i_mtime) = lli->lli_lvb.lvb_mtime;
166 LTIME_S(inode->i_ctime) = lli->lli_lvb.lvb_ctime;
168 inode_init_lvb(inode, &lvb);
170 cl_object_attr_lock(obj);
171 rc = cl_object_attr_get(env, obj, attr);
172 cl_object_attr_unlock(obj);
174 if (lvb.lvb_atime < attr->cat_atime)
175 lvb.lvb_atime = attr->cat_atime;
176 if (lvb.lvb_ctime < attr->cat_ctime)
177 lvb.lvb_ctime = attr->cat_ctime;
178 if (lvb.lvb_mtime < attr->cat_mtime)
179 lvb.lvb_mtime = attr->cat_mtime;
181 st->st_size = lvb.lvb_size;
182 st->st_blocks = lvb.lvb_blocks;
183 st->st_mtime = lvb.lvb_mtime;
184 st->st_atime = lvb.lvb_atime;
185 st->st_ctime = lvb.lvb_ctime;
192 ssize_t llu_file_prwv(const struct iovec *iovec, int iovlen,
193 _SYSIO_OFF_T pos, ssize_t len,
196 struct llu_io_session *session = (struct llu_io_session *) private;
197 struct inode *inode = session->lis_inode;
198 struct llu_inode_info *lli = llu_i2info(inode);
206 /* in a large iov read/write we'll be repeatedly called.
207 * so give a chance to answer cancel ast here
209 liblustre_wait_event(0);
211 if (len == 0 || iovlen == 0)
214 if (pos + len > lli->lli_maxbytes)
217 env = cl_env_get(&refcheck);
219 RETURN(PTR_ERR(env));
221 /* Do NOT call "ccc_env_thread_io()" again to prevent reinitializing */
222 io = &ccc_env_info(env)->cti_io;
223 if (cl_io_rw_init(env, io, session->lis_cmd == OBD_BRW_WRITE?CIT_WRITE:
227 sio = slp_env_io(env);
228 cio = ccc_env_io(env);
229 /* XXX this is not right: cio->cui_iov can be modified. */
230 cio->cui_iov = (struct iovec *)iovec;
231 cio->cui_nrsegs = iovlen;
232 cio->cui_tot_nrsegs = iovlen;
233 sio->sio_session = session;
234 err = cl_io_loop(env, io);
240 cl_env_put(env, &refcheck);
249 struct llu_io_session *get_io_session(struct inode *ino, int ngroups, int cmd)
251 struct llu_io_session *session;
253 OBD_ALLOC_PTR(session);
258 session->lis_inode = ino;
259 session->lis_max_groups = ngroups;
260 session->lis_cmd = cmd;
264 static void put_io_session(struct llu_io_session *session)
266 I_RELE(session->lis_inode);
267 OBD_FREE_PTR(session);
270 static int llu_file_rwx(struct inode *ino,
274 struct llu_io_session *session;
276 int cmd = read ? OBD_BRW_READ : OBD_BRW_WRITE;
279 LASSERT(ioctx->ioctx_xtvlen >= 0);
280 LASSERT(ioctx->ioctx_iovlen >= 0);
282 liblustre_wait_event(0);
284 if (!ioctx->ioctx_xtvlen)
287 /* XXX consider other types later */
288 if (S_ISDIR(llu_i2stat(ino)->st_mode))
290 if (!S_ISREG(llu_i2stat(ino)->st_mode))
293 session = get_io_session(ino, ioctx->ioctx_xtvlen * 2, cmd);
297 cc = _sysio_enumerate_extents(ioctx->ioctx_xtv, ioctx->ioctx_xtvlen,
298 ioctx->ioctx_iov, ioctx->ioctx_iovlen,
299 llu_file_prwv, session);
302 LASSERT(!ioctx->ioctx_cc);
303 ioctx->ioctx_private = session;
306 put_io_session(session);
309 liblustre_wait_event(0);
313 void llu_io_init(struct cl_io *io, struct inode *inode, int write)
315 struct llu_inode_info *lli = llu_i2info(inode);
317 io->u.ci_rw.crw_nonblock = lli->lli_open_flags & O_NONBLOCK;
319 io->u.ci_wr.wr_append = lli->lli_open_flags & O_APPEND;
320 io->ci_obj = llu_i2info(inode)->lli_clob;
322 if ((lli->lli_open_flags & O_APPEND) && write)
323 io->ci_lockreq = CILR_MANDATORY;
325 io->ci_lockreq = CILR_NEVER;
328 int llu_iop_read(struct inode *ino,
331 struct intnl_stat *st = llu_i2stat(ino);
338 st->st_atime = CFS_CURRENT_TIME;
340 env = cl_env_get(&refcheck);
342 RETURN(PTR_ERR(env));
344 io = ccc_env_thread_io(env);
345 llu_io_init(io, ino, 0);
347 ret = llu_file_rwx(ino, ioctx, 1);
349 cl_env_put(env, &refcheck);
353 int llu_iop_write(struct inode *ino,
356 struct intnl_stat *st = llu_i2stat(ino);
362 st->st_mtime = st->st_ctime = CFS_CURRENT_TIME;
364 env = cl_env_get(&refcheck);
366 RETURN(PTR_ERR(env));
368 io = ccc_env_thread_io(env);
369 llu_io_init(io, ino, 1);
371 ret = llu_file_rwx(ino, ioctx, 0);
372 cl_env_put(env, &refcheck);
376 int llu_iop_iodone(struct ioctx *ioctx)
378 struct llu_io_session *session;
384 liblustre_wait_event(0);
386 env = cl_env_get(&refcheck);
388 RETURN(PTR_ERR(env));
390 io = &ccc_env_info(env)->cti_io;
392 cl_env_put(env, &refcheck);
393 session = (struct llu_io_session *) ioctx->ioctx_private;
395 LASSERT(!IS_ERR(session));
397 if (session->lis_rc == 0) {
398 ioctx->ioctx_cc = session->lis_rwcount;
400 LASSERT(session->lis_rc < 0);
401 ioctx->ioctx_cc = -1;
402 ioctx->ioctx_errno = -session->lis_rc;
405 put_io_session(session);
406 ioctx->ioctx_private = NULL;
407 liblustre_wait_event(0);