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 #include <linux/config.h>
18 #include <linux/module.h>
20 #define DEBUG_SUBSYSTEM S_LLITE
22 #include <linux/lustre_lite.h>
23 #include <linux/lustre_ha.h>
25 kmem_cache_t *ll_file_data_slab;
26 extern struct address_space_operations ll_aops;
27 extern struct address_space_operations ll_dir_aops;
28 struct super_operations ll_super_operations;
30 extern void ll_recover(struct ptlrpc_client *);
31 extern int ll_commitcbd_setup(struct ll_sb_info *);
32 extern int ll_commitcbd_cleanup(struct ll_sb_info *);
34 static char *ll_read_opt(const char *opt, char *data)
40 CDEBUG(D_INFO, "option: %s, data %s\n", opt, data);
41 if ( strncmp(opt, data, strlen(opt)) )
43 if ( (value = strchr(data, '=')) == NULL )
47 OBD_ALLOC(retval, strlen(value) + 1);
49 CERROR("out of memory!\n");
53 memcpy(retval, value, strlen(value)+1);
54 CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
58 static void ll_options(char *options, char **dev, char **vers)
68 for (this_char = strtok (options, ",");
70 this_char = strtok (NULL, ",")) {
71 CDEBUG(D_INFO, "this_char %s\n", this_char);
72 if ( (!*dev && (*dev = ll_read_opt("device", this_char)))||
73 (!*vers && (*vers = ll_read_opt("version", this_char))) )
79 static struct super_block * ll_read_super(struct super_block *sb,
80 void *data, int silent)
82 struct inode *root = 0;
83 struct ll_sb_info *sbi;
88 struct ll_fid rootfid;
89 __u64 last_committed, last_rcvd;
91 struct ptlrpc_request *request = NULL;
96 OBD_ALLOC(sbi, sizeof(*sbi));
102 sb->u.generic_sbp = sbi;
104 ll_options(data, &device, &version);
107 CERROR("no device\n");
108 GOTO(out_free, sb = NULL);
111 devno = simple_strtoul(device, NULL, 0);
112 if (devno >= MAX_OBD_DEVICES) {
113 CERROR("device of %s too high\n", device);
114 GOTO(out_free, sb = NULL);
117 sbi->ll_conn.oc_dev = &obd_dev[devno];
118 err = obd_connect(&sbi->ll_conn);
120 CERROR("cannot connect to %s: rc = %d\n", device, err);
121 GOTO(out_free, sb = NULL);
124 ptlrpc_init_client(ptlrpc_connmgr, ll_recover,
125 MDS_REQUEST_PORTAL, MDC_REPLY_PORTAL,
126 &sbi->ll_mds_client);
128 sbi->ll_mds_conn = ptlrpc_uuid_to_connection("mds");
129 if (!sbi->ll_mds_conn) {
130 CERROR("cannot find MDS\n");
131 GOTO(out_disc, sb = NULL);
134 err = connmgr_connect(ptlrpc_connmgr, sbi->ll_mds_conn);
136 CERROR("cannot connect to MDS: rc = %d\n", err);
137 ptlrpc_put_connection(sbi->ll_mds_conn);
138 GOTO(out_disc, sb = NULL);
141 sbi->ll_mds_conn->c_level = LUSTRE_CONN_FULL;
143 /* XXX: need to store the last_* values somewhere */
144 err = mdc_connect(&sbi->ll_mds_client, sbi->ll_mds_conn,
145 &rootfid, &last_committed, &last_rcvd, &last_xid,
148 CERROR("cannot mds_connect: rc = %d\n", err);
149 GOTO(out_disc, sb = NULL);
151 CERROR("rootfid %ld\n", (unsigned long)rootfid.id);
152 sbi->ll_rootino = rootfid.id;
154 sb->s_maxbytes = 1ULL << 36;
155 sb->s_blocksize = PAGE_SIZE;
156 sb->s_blocksize_bits = (unsigned char)PAGE_SHIFT;
157 sb->s_magic = LL_SUPER_MAGIC;
158 sb->s_op = &ll_super_operations;
160 /* make root inode */
161 err = mdc_getattr(&sbi->ll_mds_client, sbi->ll_mds_conn,
162 sbi->ll_rootino, S_IFDIR,
163 OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS, &request);
165 CERROR("mdc_getattr failed for root: rc = %d\n", err);
166 GOTO(out_req, sb = NULL);
169 /* initialize committed transaction callback daemon */
170 spin_lock_init(&sbi->ll_commitcbd_lock);
171 init_waitqueue_head(&sbi->ll_commitcbd_waitq);
172 init_waitqueue_head(&sbi->ll_commitcbd_ctl_waitq);
173 sbi->ll_commitcbd_flags = 0;
174 err = ll_commitcbd_setup(sbi);
176 CERROR("failed to start commit callback daemon: rc = %d\n",err);
177 GOTO(out_req, sb = NULL);
180 root = iget4(sb, sbi->ll_rootino, NULL,
181 lustre_msg_buf(request->rq_repmsg, 0));
183 sb->s_root = d_alloc_root(root);
185 CERROR("lustre_lite: bad iget4 for root\n");
186 GOTO(out_req, sb = NULL);
190 ptlrpc_free_req(request);
193 obd_disconnect(&sbi->ll_conn);
196 OBD_FREE(sbi, sizeof(*sbi));
199 OBD_FREE(device, strlen(device) + 1);
201 OBD_FREE(version, strlen(version) + 1);
204 } /* ll_read_super */
206 static void ll_put_super(struct super_block *sb)
208 struct ll_sb_info *sbi = sb->u.generic_sbp;
210 ll_commitcbd_cleanup(sbi);
211 obd_disconnect(&sbi->ll_conn);
212 ptlrpc_put_connection(sbi->ll_mds_conn);
213 ptlrpc_cleanup_client(&sbi->ll_mds_client);
214 OBD_FREE(sb->u.generic_sbp, sizeof(*sbi));
220 extern inline struct obdo * ll_oa_from_inode(struct inode *inode, int valid);
221 static void ll_delete_inode(struct inode *inode)
223 if (S_ISREG(inode->i_mode)) {
226 oa = ll_oa_from_inode(inode, OBD_MD_FLNOTOBD);
228 CERROR("no memory\n");
231 err = obd_destroy(ll_i2obdconn(inode), oa);
232 CDEBUG(D_INODE, "obd destroy of %Ld error %d\n",
233 (unsigned long long)oa->o_id, err);
240 /* like inode_setattr, but doesn't mark the inode dirty */
241 static int ll_attr2inode(struct inode * inode, struct iattr * attr, int trunc)
243 unsigned int ia_valid = attr->ia_valid;
246 if ((ia_valid & ATTR_SIZE) && trunc ) {
247 error = vmtruncate(inode, attr->ia_size);
250 } else if (ia_valid & ATTR_SIZE) {
251 inode->i_size = attr->ia_size;
254 if (ia_valid & ATTR_UID)
255 inode->i_uid = attr->ia_uid;
256 if (ia_valid & ATTR_GID)
257 inode->i_gid = attr->ia_gid;
258 if (ia_valid & ATTR_ATIME)
259 inode->i_atime = attr->ia_atime;
260 if (ia_valid & ATTR_MTIME)
261 inode->i_mtime = attr->ia_mtime;
262 if (ia_valid & ATTR_CTIME)
263 inode->i_ctime = attr->ia_ctime;
264 if (ia_valid & ATTR_MODE) {
265 inode->i_mode = attr->ia_mode;
266 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
267 inode->i_mode &= ~S_ISGID;
273 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
275 struct ptlrpc_request *request = NULL;
276 struct ll_sb_info *sbi = ll_i2sbi(inode);
281 /* change incore inode */
282 ll_attr2inode(inode, attr, do_trunc);
284 err = mdc_setattr(&sbi->ll_mds_client, sbi->ll_mds_conn, inode, attr,
287 CERROR("mdc_setattr fails (%d)\n", err);
289 ptlrpc_req_finished(request);
294 int ll_setattr(struct dentry *de, struct iattr *attr)
296 return ll_inode_setattr(de->d_inode, attr, 1);
299 static int ll_statfs(struct super_block *sb, struct statfs *buf)
305 err = obd_statfs(&ll_s2sbi(sb)->ll_conn, &tmp);
307 CERROR("obd_statfs fails (%d)\n", err);
310 memcpy(buf, &tmp, sizeof(*buf));
311 CDEBUG(D_SUPER, "statfs returns avail %ld\n", tmp.f_bavail);
316 static void inline ll_to_inode(struct inode *dst, struct mds_body *body)
318 struct ll_inode_info *ii =
319 (struct ll_inode_info *) &dst->u.generic_ip;
321 /* core attributes first */
322 if ( body->valid & OBD_MD_FLID )
323 dst->i_ino = body->ino;
324 if ( body->valid & OBD_MD_FLATIME )
325 dst->i_atime = body->atime;
326 if ( body->valid & OBD_MD_FLMTIME )
327 dst->i_mtime = body->mtime;
328 if ( body->valid & OBD_MD_FLCTIME )
329 dst->i_ctime = body->ctime;
330 if ( body->valid & OBD_MD_FLSIZE )
331 dst->i_size = body->size;
332 if ( body->valid & OBD_MD_FLMODE )
333 dst->i_mode = body->mode;
334 if ( body->valid & OBD_MD_FLUID )
335 dst->i_uid = body->uid;
336 if ( body->valid & OBD_MD_FLGID )
337 dst->i_gid = body->gid;
338 if ( body->valid & OBD_MD_FLFLAGS )
339 dst->i_flags = body->flags;
340 if ( body->valid & OBD_MD_FLNLINK )
341 dst->i_nlink = body->nlink;
342 if ( body->valid & OBD_MD_FLGENER )
343 dst->i_generation = body->generation;
345 /* this will become more elaborate for striping etc */
346 if (body->valid & OBD_MD_FLOBJID)
347 ii->lli_objid = body->objid;
350 if (obdo_has_inline(oa)) {
351 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
352 S_ISFIFO(inode->i_mode)) {
353 obd_rdev rdev = *((obd_rdev *)oa->o_inline);
355 "copying device %x from obdo to inode\n", rdev);
356 init_special_inode(inode, inode->i_mode, rdev);
358 CDEBUG(D_INFO, "copying inline from obdo to inode\n");
359 memcpy(oinfo->lli_inline, oa->o_inline, OBD_INLINESZ);
361 oinfo->lli_flags |= OBD_FL_INLINEDATA;
366 static inline void ll_read_inode2(struct inode *inode, void *opaque)
368 struct mds_body *body = opaque;
371 ll_to_inode(inode, body);
373 /* OIDEBUG(inode); */
375 if (S_ISREG(inode->i_mode)) {
376 inode->i_op = &ll_file_inode_operations;
377 inode->i_fop = &ll_file_operations;
378 inode->i_mapping->a_ops = &ll_aops;
380 } else if (S_ISDIR(inode->i_mode)) {
381 inode->i_op = &ll_dir_inode_operations;
382 inode->i_fop = &ll_dir_operations;
383 inode->i_mapping->a_ops = &ll_dir_aops;
385 } else if (S_ISLNK(inode->i_mode)) {
386 inode->i_op = &ll_fast_symlink_inode_operations;
389 init_special_inode(inode, inode->i_mode,
390 ((int *)ll_i2info(inode)->lli_inline)[0]);
397 /* exported operations */
398 struct super_operations ll_super_operations =
400 read_inode2: ll_read_inode2,
401 delete_inode: ll_delete_inode,
402 put_super: ll_put_super,
406 struct file_system_type lustre_lite_fs_type = {
407 "lustre_lite", 0, ll_read_super, NULL
410 static int __init init_lustre_lite(void)
412 printk(KERN_INFO "Lustre Lite 0.0.1, braam@clusterfs.com\n");
413 ll_file_data_slab = kmem_cache_create("ll_file_data",
414 sizeof(struct ll_file_data), 0,
415 SLAB_HWCACHE_ALIGN, NULL, NULL);
416 if (ll_file_data_slab == NULL)
418 return register_filesystem(&lustre_lite_fs_type);
421 static void __exit exit_lustre_lite(void)
423 unregister_filesystem(&lustre_lite_fs_type);
424 kmem_cache_destroy(ll_file_data_slab);
427 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
428 MODULE_DESCRIPTION("Lustre Lite Client File System v1.0");
429 MODULE_LICENSE("GPL");
431 module_init(init_lustre_lite);
432 module_exit(exit_lustre_lite);