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) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2014, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * Author: Nikita Danilov <nikita.danilov@sun.com>
39 #define DEBUG_SUBSYSTEM S_LLITE
41 #include <libcfs/libcfs.h>
43 #include <linux/sched.h>
45 #include <linux/quotaops.h>
46 #include <linux/highmem.h>
47 #include <linux/pagemap.h>
48 #include <linux/rbtree.h>
51 #include <obd_support.h>
52 #include <lustre_fid.h>
53 #include <lustre_dlm.h>
54 #include <lustre_ver.h>
55 #include <lustre_mdc.h>
56 #include <cl_object.h>
58 #include "llite_internal.h"
59 #include "vvp_internal.h"
62 * An `emergency' environment used by cl_inode_fini() when cl_env_get()
63 * fails. Access to this environment is serialized by cl_inode_fini_guard
66 struct lu_env *cl_inode_fini_env;
67 int cl_inode_fini_refcheck;
70 * A mutex serializing calls to slp_inode_fini() under extreme memory
71 * pressure, when environments cannot be allocated.
73 static DEFINE_MUTEX(cl_inode_fini_guard);
75 int cl_setattr_ost(struct cl_object *obj, const struct iattr *attr,
76 unsigned int attr_flags)
85 env = cl_env_get(&refcheck);
89 io = vvp_env_thread_io(env);
91 io->ci_verify_layout = 1;
93 io->u.ci_setattr.sa_attr.lvb_atime = LTIME_S(attr->ia_atime);
94 io->u.ci_setattr.sa_attr.lvb_mtime = LTIME_S(attr->ia_mtime);
95 io->u.ci_setattr.sa_attr.lvb_ctime = LTIME_S(attr->ia_ctime);
96 io->u.ci_setattr.sa_attr.lvb_size = attr->ia_size;
97 io->u.ci_setattr.sa_attr_flags = attr_flags;
98 io->u.ci_setattr.sa_valid = attr->ia_valid;
99 io->u.ci_setattr.sa_parent_fid = lu_object_fid(&obj->co_lu);
102 if (cl_io_init(env, io, CIT_SETATTR, io->ci_obj) == 0) {
103 struct vvp_io *vio = vvp_env_io(env);
105 if (attr->ia_valid & ATTR_FILE)
106 /* populate the file descriptor for ftruncate to honor
107 * group lock - see LU-787 */
108 vio->vui_fd = LUSTRE_FPRIVATE(attr->ia_file);
110 result = cl_io_loop(env, io);
112 result = io->ci_result;
115 if (unlikely(io->ci_need_restart))
118 cl_env_put(env, &refcheck);
123 * Initialize or update CLIO structures for regular files when new
124 * meta-data arrives from the server.
126 * \param inode regular file inode
127 * \param md new file metadata from MDS
128 * - allocates cl_object if necessary,
129 * - updated layout, if object was already here.
131 int cl_file_inode_init(struct inode *inode, struct lustre_md *md)
134 struct ll_inode_info *lli;
135 struct cl_object *clob;
136 struct lu_site *site;
138 struct cl_object_conf conf = {
141 .coc_layout = md->layout,
147 LASSERT(md->body->mbo_valid & OBD_MD_FLID);
148 LASSERT(S_ISREG(inode->i_mode));
150 env = cl_env_get(&refcheck);
154 site = ll_i2sbi(inode)->ll_site;
155 lli = ll_i2info(inode);
157 LASSERT(fid_is_sane(fid));
159 if (lli->lli_clob == NULL) {
160 /* clob is slave of inode, empty lli_clob means for new inode,
161 * there is no clob in cache with the given fid, so it is
162 * unnecessary to perform lookup-alloc-lookup-insert, just
163 * alloc and insert directly. */
164 LASSERT(inode->i_state & I_NEW);
165 conf.coc_lu.loc_flags = LOC_F_NEW;
166 clob = cl_object_find(env, lu2cl_dev(site->ls_top_dev),
170 * No locking is necessary, as new inode is
171 * locked by I_NEW bit.
173 lli->lli_clob = clob;
174 lu_object_ref_add(&clob->co_lu, "inode", inode);
176 result = PTR_ERR(clob);
178 result = cl_conf_set(env, lli->lli_clob, &conf);
181 cl_env_put(env, &refcheck);
184 CERROR("Failure to initialize cl object "DFID": %d\n",
190 * Wait for others drop their references of the object at first, then we drop
191 * the last one, which will lead to the object be destroyed immediately.
192 * Must be called after cl_object_kill() against this object.
194 * The reason we want to do this is: destroying top object will wait for sub
195 * objects being destroyed first, so we can't let bottom layer (e.g. from ASTs)
196 * to initiate top object destroying which may deadlock. See bz22520.
198 static void cl_object_put_last(struct lu_env *env, struct cl_object *obj)
200 struct lu_object_header *header = obj->co_lu.lo_header;
203 if (unlikely(atomic_read(&header->loh_ref) != 1)) {
204 struct lu_site *site = obj->co_lu.lo_dev->ld_site;
205 struct lu_site_bkt_data *bkt;
207 bkt = lu_site_bkt_from_fid(site, &header->loh_fid);
209 init_waitqueue_entry(&waiter, current);
210 add_wait_queue(&bkt->lsb_marche_funebre, &waiter);
213 set_current_state(TASK_UNINTERRUPTIBLE);
214 if (atomic_read(&header->loh_ref) == 1)
219 set_current_state(TASK_RUNNING);
220 remove_wait_queue(&bkt->lsb_marche_funebre, &waiter);
223 cl_object_put(env, obj);
226 void cl_inode_fini(struct inode *inode)
229 struct ll_inode_info *lli = ll_i2info(inode);
230 struct cl_object *clob = lli->lli_clob;
237 cookie = cl_env_reenter();
238 env = cl_env_get(&refcheck);
239 emergency = IS_ERR(env);
241 mutex_lock(&cl_inode_fini_guard);
242 LASSERT(cl_inode_fini_env != NULL);
243 cl_env_implant(cl_inode_fini_env, &refcheck);
244 env = cl_inode_fini_env;
248 * cl_object cache is a slave to inode cache (which, in turn
249 * is a slave to dentry cache), don't keep cl_object in memory
250 * when its master is evicted.
252 cl_object_kill(env, clob);
253 lu_object_ref_del(&clob->co_lu, "inode", inode);
254 cl_object_put_last(env, clob);
255 lli->lli_clob = NULL;
257 cl_env_unplant(cl_inode_fini_env, &refcheck);
258 mutex_unlock(&cl_inode_fini_guard);
260 cl_env_put(env, &refcheck);
263 cl_env_reexit(cookie);
268 * build inode number from passed @fid */
269 __u64 cl_fid_build_ino(const struct lu_fid *fid, int api32)
271 if (BITS_PER_LONG == 32 || api32)
272 RETURN(fid_flatten32(fid));
274 RETURN(fid_flatten(fid));
278 * build inode generation from passed @fid. If our FID overflows the 32-bit
279 * inode number then return a non-zero generation to distinguish them. */
280 __u32 cl_fid_build_gen(const struct lu_fid *fid)
285 if (fid_is_igif(fid)) {
286 gen = lu_igif_gen(fid);
290 gen = (fid_flatten(fid) >> 32);