1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Lustre Light Super operations
6 * This code is issued under the GNU General Public License.
7 * See the file COPYING in this distribution
9 * Copryright (C) 1996 Peter J. Braam <braam@stelias.com>
10 * Copryright (C) 1999 Stelias Computing Inc. <braam@stelias.com>
11 * Copryright (C) 1999 Seagate Technology Inc.
12 * Copryright (C) 2001 Mountain View Data, Inc.
13 * Copryright (C) 2002 Cluster File Systems, Inc.
17 #define DEBUG_SUBSYSTEM S_LLITE
19 #include <linux/module.h>
20 #include <linux/lustre_lite.h>
21 #include <linux/lustre_ha.h>
22 #include <linux/lustre_dlm.h>
24 kmem_cache_t *ll_file_data_slab;
25 extern struct address_space_operations ll_aops;
26 extern struct address_space_operations ll_dir_aops;
27 struct super_operations ll_super_operations;
29 extern int ll_recover(struct ptlrpc_client *);
30 extern int ll_commitcbd_setup(struct ll_sb_info *);
31 extern int ll_commitcbd_cleanup(struct ll_sb_info *);
33 static char *ll_read_opt(const char *opt, char *data)
39 CDEBUG(D_INFO, "option: %s, data %s\n", opt, data);
40 if ( strncmp(opt, data, strlen(opt)) )
42 if ( (value = strchr(data, '=')) == NULL )
46 OBD_ALLOC(retval, strlen(value) + 1);
48 CERROR("out of memory!\n");
52 memcpy(retval, value, strlen(value)+1);
53 CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
57 static void ll_options(char *options, char **dev, char **vers)
67 for (this_char = strtok (options, ",");
69 this_char = strtok (NULL, ",")) {
70 CDEBUG(D_INFO, "this_char %s\n", this_char);
71 if ( (!*dev && (*dev = ll_read_opt("device", this_char)))||
72 (!*vers && (*vers = ll_read_opt("version", this_char))) )
78 static struct super_block * ll_read_super(struct super_block *sb,
79 void *data, int silent)
81 struct inode *root = 0;
82 struct ll_sb_info *sbi;
87 struct ll_fid rootfid;
88 __u64 last_committed, last_rcvd;
90 struct ptlrpc_request *request = NULL;
95 OBD_ALLOC(sbi, sizeof(*sbi));
101 sb->u.generic_sbp = sbi;
103 ll_options(data, &device, &version);
106 CERROR("no device\n");
107 GOTO(out_free, sb = NULL);
110 devno = simple_strtoul(device, NULL, 0);
111 if (devno >= MAX_OBD_DEVICES) {
112 CERROR("device of %s too high\n", device);
113 GOTO(out_free, sb = NULL);
116 sbi->ll_conn.oc_dev = &obd_dev[devno];
117 err = obd_connect(&sbi->ll_conn);
119 CERROR("cannot connect to %s: rc = %d\n", device, err);
120 GOTO(out_free, sb = NULL);
123 sbi->ll_namespace = ldlm_namespace_new(NULL, 1);
124 if (sbi->ll_namespace == NULL) {
125 CERROR("failed to create local lock namespace\n");
126 GOTO(out_free, sb = NULL);
129 ptlrpc_init_client(ptlrpc_connmgr, ll_recover,
130 MDS_REQUEST_PORTAL, MDC_REPLY_PORTAL,
131 &sbi->ll_mds_client);
133 sbi->ll_mds_client.cli_data = sbi;
134 sbi->ll_mds_client.cli_name = "mdc";
135 sbi->ll_mds_conn = ptlrpc_uuid_to_connection("mds");
136 if (!sbi->ll_mds_conn) {
137 CERROR("cannot find MDS\n");
138 GOTO(out_disc, sb = NULL);
141 err = connmgr_connect(ptlrpc_connmgr, sbi->ll_mds_conn);
143 CERROR("cannot connect to MDS: rc = %d\n", err);
144 ptlrpc_put_connection(sbi->ll_mds_conn);
145 GOTO(out_disc, sb = NULL);
148 sbi->ll_mds_conn->c_level = LUSTRE_CONN_FULL;
150 /* XXX: need to store the last_* values somewhere */
151 err = mdc_connect(&sbi->ll_mds_client, sbi->ll_mds_conn,
152 &rootfid, &last_committed, &last_rcvd, &last_xid,
155 CERROR("cannot mds_connect: rc = %d\n", err);
156 GOTO(out_disc, sb = NULL);
158 CERROR("rootfid %ld\n", (unsigned long)rootfid.id);
159 sbi->ll_rootino = rootfid.id;
161 sb->s_maxbytes = 1ULL << 36;
162 /* XXX get this with a get_info call (like we have in OBDFS),
163 this info call should return the blocksize of the MDS */
164 sb->s_blocksize = 4096;
165 sb->s_blocksize_bits = 12;
166 sb->s_magic = LL_SUPER_MAGIC;
167 sb->s_op = &ll_super_operations;
169 /* make root inode */
170 err = mdc_getattr(&sbi->ll_mds_client, sbi->ll_mds_conn,
171 sbi->ll_rootino, S_IFDIR,
172 OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS, 0, &request);
174 CERROR("mdc_getattr failed for root: rc = %d\n", err);
175 GOTO(out_req, sb = NULL);
178 /* initialize committed transaction callback daemon */
179 spin_lock_init(&sbi->ll_commitcbd_lock);
180 init_waitqueue_head(&sbi->ll_commitcbd_waitq);
181 init_waitqueue_head(&sbi->ll_commitcbd_ctl_waitq);
182 sbi->ll_commitcbd_flags = 0;
183 err = ll_commitcbd_setup(sbi);
185 CERROR("failed to start commit callback daemon: rc = %d\n",err);
186 GOTO(out_req, sb = NULL);
189 root = iget4(sb, sbi->ll_rootino, NULL,
190 lustre_msg_buf(request->rq_repmsg, 0));
192 sb->s_root = d_alloc_root(root);
194 CERROR("lustre_lite: bad iget4 for root\n");
195 GOTO(out_req, sb = NULL);
199 ptlrpc_free_req(request);
202 obd_disconnect(&sbi->ll_conn);
205 if (sbi->ll_namespace)
206 ldlm_namespace_free(sbi->ll_namespace);
207 OBD_FREE(sbi, sizeof(*sbi));
210 OBD_FREE(device, strlen(device) + 1);
212 OBD_FREE(version, strlen(version) + 1);
215 } /* ll_read_super */
217 static void ll_put_super(struct super_block *sb)
219 struct ll_sb_info *sbi = sb->u.generic_sbp;
221 ll_commitcbd_cleanup(sbi);
222 obd_disconnect(&sbi->ll_conn);
223 ldlm_namespace_free(sbi->ll_namespace);
224 ptlrpc_put_connection(sbi->ll_mds_conn);
225 ptlrpc_cleanup_client(&sbi->ll_mds_client);
226 OBD_FREE(sb->u.generic_sbp, sizeof(*sbi));
232 extern inline struct obdo * ll_oa_from_inode(struct inode *inode, int valid);
233 static void ll_delete_inode(struct inode *inode)
235 if (S_ISREG(inode->i_mode)) {
238 oa = ll_oa_from_inode(inode, OBD_MD_FLNOTOBD);
240 CERROR("no memory\n");
243 err = obd_destroy(ll_i2obdconn(inode), oa);
244 CDEBUG(D_INODE, "obd destroy of %Ld error %d\n",
245 (unsigned long long)oa->o_id, err);
252 /* like inode_setattr, but doesn't mark the inode dirty */
253 static int ll_attr2inode(struct inode * inode, struct iattr * attr, int trunc)
255 unsigned int ia_valid = attr->ia_valid;
258 if ((ia_valid & ATTR_SIZE) && trunc ) {
259 error = vmtruncate(inode, attr->ia_size);
262 } else if (ia_valid & ATTR_SIZE) {
263 inode->i_size = attr->ia_size;
266 if (ia_valid & ATTR_UID)
267 inode->i_uid = attr->ia_uid;
268 if (ia_valid & ATTR_GID)
269 inode->i_gid = attr->ia_gid;
270 if (ia_valid & ATTR_ATIME)
271 inode->i_atime = attr->ia_atime;
272 if (ia_valid & ATTR_MTIME)
273 inode->i_mtime = attr->ia_mtime;
274 if (ia_valid & ATTR_CTIME)
275 inode->i_ctime = attr->ia_ctime;
276 if (ia_valid & ATTR_MODE) {
277 inode->i_mode = attr->ia_mode;
278 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
279 inode->i_mode &= ~S_ISGID;
285 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
287 struct ptlrpc_request *request = NULL;
288 struct ll_sb_info *sbi = ll_i2sbi(inode);
293 /* change incore inode */
294 ll_attr2inode(inode, attr, do_trunc);
296 err = mdc_setattr(&sbi->ll_mds_client, sbi->ll_mds_conn, inode, attr,
299 CERROR("mdc_setattr fails (%d)\n", err);
301 ptlrpc_req_finished(request);
306 int ll_setattr(struct dentry *de, struct iattr *attr)
308 return ll_inode_setattr(de->d_inode, attr, 1);
311 static int ll_statfs(struct super_block *sb, struct statfs *buf)
317 err = obd_statfs(&ll_s2sbi(sb)->ll_conn, &tmp);
319 CERROR("obd_statfs fails (%d)\n", err);
322 memcpy(buf, &tmp, sizeof(*buf));
323 CDEBUG(D_SUPER, "statfs returns avail %ld\n", tmp.f_bavail);
328 static void inline ll_to_inode(struct inode *dst, struct mds_body *body)
330 struct ll_inode_info *ii =
331 (struct ll_inode_info *) &dst->u.generic_ip;
333 /* core attributes first */
334 if ( body->valid & OBD_MD_FLID )
335 dst->i_ino = body->ino;
336 if ( body->valid & OBD_MD_FLATIME )
337 dst->i_atime = body->atime;
338 if ( body->valid & OBD_MD_FLMTIME )
339 dst->i_mtime = body->mtime;
340 if ( body->valid & OBD_MD_FLCTIME )
341 dst->i_ctime = body->ctime;
342 if ( body->valid & OBD_MD_FLSIZE )
343 dst->i_size = body->size;
344 if ( body->valid & OBD_MD_FLMODE )
345 dst->i_mode = body->mode;
346 if ( body->valid & OBD_MD_FLUID )
347 dst->i_uid = body->uid;
348 if ( body->valid & OBD_MD_FLGID )
349 dst->i_gid = body->gid;
350 if ( body->valid & OBD_MD_FLFLAGS )
351 dst->i_flags = body->flags;
352 if ( body->valid & OBD_MD_FLNLINK )
353 dst->i_nlink = body->nlink;
354 if ( body->valid & OBD_MD_FLGENER )
355 dst->i_generation = body->generation;
357 /* this will become more elaborate for striping etc */
358 if (body->valid & OBD_MD_FLOBJID)
359 ii->lli_objid = body->objid;
362 if (obdo_has_inline(oa)) {
363 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
364 S_ISFIFO(inode->i_mode)) {
365 obd_rdev rdev = *((obd_rdev *)oa->o_inline);
367 "copying device %x from obdo to inode\n", rdev);
368 init_special_inode(inode, inode->i_mode, rdev);
370 CDEBUG(D_INFO, "copying inline from obdo to inode\n");
371 memcpy(oinfo->lli_inline, oa->o_inline, OBD_INLINESZ);
373 oinfo->lli_flags |= OBD_FL_INLINEDATA;
378 static inline void ll_read_inode2(struct inode *inode, void *opaque)
380 struct mds_body *body = opaque;
383 ll_to_inode(inode, body);
385 /* OIDEBUG(inode); */
387 if (S_ISREG(inode->i_mode)) {
388 inode->i_op = &ll_file_inode_operations;
389 inode->i_fop = &ll_file_operations;
390 inode->i_mapping->a_ops = &ll_aops;
392 } else if (S_ISDIR(inode->i_mode)) {
393 inode->i_op = &ll_dir_inode_operations;
394 inode->i_fop = &ll_dir_operations;
395 inode->i_mapping->a_ops = &ll_dir_aops;
397 } else if (S_ISLNK(inode->i_mode)) {
398 inode->i_op = &ll_fast_symlink_inode_operations;
401 init_special_inode(inode, inode->i_mode,
402 ((int *)ll_i2info(inode)->lli_inline)[0]);
409 /* exported operations */
410 struct super_operations ll_super_operations =
412 read_inode2: ll_read_inode2,
413 delete_inode: ll_delete_inode,
414 put_super: ll_put_super,
418 struct file_system_type lustre_lite_fs_type = {
419 "lustre_lite", 0, ll_read_super, NULL
422 static int __init init_lustre_lite(void)
424 printk(KERN_INFO "Lustre Lite 0.0.1, braam@clusterfs.com\n");
425 ll_file_data_slab = kmem_cache_create("ll_file_data",
426 sizeof(struct ll_file_data), 0,
427 SLAB_HWCACHE_ALIGN, NULL, NULL);
428 if (ll_file_data_slab == NULL)
430 return register_filesystem(&lustre_lite_fs_type);
433 static void __exit exit_lustre_lite(void)
435 unregister_filesystem(&lustre_lite_fs_type);
436 kmem_cache_destroy(ll_file_data_slab);
439 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
440 MODULE_DESCRIPTION("Lustre Lite Client File System v1.0");
441 MODULE_LICENSE("GPL");
443 module_init(init_lustre_lite);
444 module_exit(exit_lustre_lite);