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) 2002 Cluster File Systems, Inc.
12 #define DEBUG_SUBSYSTEM S_LLITE
14 #include <linux/module.h>
15 #include <linux/random.h>
16 #include <linux/lustre_lite.h>
17 #include <linux/lustre_ha.h>
18 #include <linux/lustre_dlm.h>
19 #include <linux/init.h>
21 kmem_cache_t *ll_file_data_slab;
22 extern struct address_space_operations ll_aops;
23 extern struct address_space_operations ll_dir_aops;
24 struct super_operations ll_super_operations;
26 extern int ll_recover(struct ptlrpc_client *);
27 extern int ll_commitcbd_setup(struct ll_sb_info *);
28 extern int ll_commitcbd_cleanup(struct ll_sb_info *);
30 static char *ll_read_opt(const char *opt, char *data)
36 CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
37 if ( strncmp(opt, data, strlen(opt)) )
39 if ( (value = strchr(data, '=')) == NULL )
43 OBD_ALLOC(retval, strlen(value) + 1);
45 CERROR("out of memory!\n");
49 memcpy(retval, value, strlen(value)+1);
50 CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
54 static void ll_options(char *options, char **ost, char **mds)
64 for (this_char = strtok (options, ",");
66 this_char = strtok (NULL, ",")) {
67 CDEBUG(D_SUPER, "this_char %s\n", this_char);
68 if ( (!*ost && (*ost = ll_read_opt("osc", this_char)))||
69 (!*mds && (*mds = ll_read_opt("mdc", this_char))) )
76 #define log2(n) ffz(~(n))
79 static struct super_block * ll_read_super(struct super_block *sb,
80 void *data, int silent)
82 struct inode *root = 0;
83 struct obd_device *obd;
84 struct ll_sb_info *sbi;
88 struct ll_fid rootfid;
92 struct ptlrpc_request *request = NULL;
93 struct ll_inode_md md;
99 OBD_ALLOC(sbi, sizeof(*sbi));
105 generate_random_uuid(uuid);
106 class_uuid_unparse(uuid, sbi->ll_sb_uuid);
108 sb->u.generic_sbp = sbi;
110 ll_options(data, &osc, &mdc);
114 GOTO(out_free, sb = NULL);
119 GOTO(out_free, sb = NULL);
122 obd = class_uuid2obd(mdc);
124 CERROR("MDC %s: not setup or attached\n", mdc);
125 GOTO(out_free, sb = NULL);
129 err = connmgr_connect(ptlrpc_connmgr, sbi->ll_mdc_conn);
131 CERROR("cannot connect to MDC: rc = %d\n", err);
132 GOTO(out_rpc, sb = NULL);
136 err = obd_connect(&sbi->ll_mdc_conn, obd, sbi->ll_sb_uuid);
138 CERROR("cannot connect to %s: rc = %d\n", mdc, err);
139 GOTO(out_free, sb = NULL);
141 sbi2mdc(sbi)->cl_conn->c_level = LUSTRE_CONN_FULL;
143 obd = class_uuid2obd(osc);
145 CERROR("OSC %s: not setup or attached\n", osc);
146 GOTO(out_mdc, sb = NULL);
148 err = obd_connect(&sbi->ll_osc_conn, obd, sbi->ll_sb_uuid);
150 CERROR("cannot connect to %s: rc = %d\n", osc, err);
151 GOTO(out_mdc, sb = NULL);
154 /* XXX: need to store the last_* values somewhere */
155 err = mdc_getstatus(&sbi->ll_mdc_conn, &rootfid, &last_committed,
156 &last_xid, &request);
157 ptlrpc_req_finished(request);
159 CERROR("cannot mds_connect: rc = %d\n", err);
160 GOTO(out_mdc, sb = NULL);
162 CDEBUG(D_SUPER, "rootfid %Ld\n", (unsigned long long)rootfid.id);
163 sbi->ll_rootino = rootfid.id;
165 memset(&sfs, 0, sizeof(sfs));
167 err = mdc_statfs(&sbi->ll_mdc_conn, &sfs, &request);
168 ptlrpc_req_finished(request);
169 sb->s_blocksize = sfs.f_bsize;
170 sb->s_blocksize_bits = log2(sfs.f_bsize);
171 sb->s_magic = LL_SUPER_MAGIC;
172 sb->s_maxbytes = (1ULL << (32 + 9)) - sfs.f_bsize;
174 sb->s_op = &ll_super_operations;
176 /* make root inode */
178 err = mdc_getattr(&sbi->ll_mdc_conn, sbi->ll_rootino, S_IFDIR,
179 OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS, 0, &request);
181 CERROR("mdc_getattr failed for root: rc = %d\n", err);
182 GOTO(out_request, sb = NULL);
185 /* initialize committed transaction callback daemon */
186 spin_lock_init(&sbi->ll_commitcbd_lock);
187 init_waitqueue_head(&sbi->ll_commitcbd_waitq);
188 init_waitqueue_head(&sbi->ll_commitcbd_ctl_waitq);
189 sbi->ll_commitcbd_flags = 0;
190 err = ll_commitcbd_setup(sbi);
192 CERROR("failed to start commit callback daemon: rc = %d\n",err);
193 GOTO(out_request, sb = NULL);
196 md.body = lustre_msg_buf(request->rq_repmsg, 0);
198 root = iget4(sb, sbi->ll_rootino, NULL, &md);
201 sb->s_root = d_alloc_root(root);
203 CERROR("lustre_lite: bad iget4 for root\n");
204 GOTO(out_cdb, sb = NULL);
207 ptlrpc_req_finished(request);
211 OBD_FREE(mdc, strlen(mdc) + 1);
213 OBD_FREE(osc, strlen(osc) + 1);
218 ll_commitcbd_cleanup(sbi);
220 ptlrpc_req_finished(request);
221 obd_disconnect(&sbi->ll_osc_conn);
223 obd_disconnect(&sbi->ll_mdc_conn);
225 OBD_FREE(sbi, sizeof(*sbi));
229 } /* ll_read_super */
231 static void ll_put_super(struct super_block *sb)
233 struct ll_sb_info *sbi = ll_s2sbi(sb);
235 ll_commitcbd_cleanup(sbi);
236 obd_disconnect(&sbi->ll_osc_conn);
237 obd_disconnect(&sbi->ll_mdc_conn);
238 OBD_FREE(sbi, sizeof(*sbi));
244 static void ll_clear_inode(struct inode *inode)
246 if (atomic_read(&inode->i_count) == 0) {
247 struct ll_inode_info *lli = ll_i2info(inode);
248 struct lov_stripe_md *md = lli->lli_smd;
251 OBD_FREE(md, md->lmd_easize);
254 if (lli->lli_symlink_name) {
255 OBD_FREE(lli->lli_symlink_name,
256 strlen(lli->lli_symlink_name) + 1);
257 lli->lli_symlink_name = NULL;
262 static void ll_delete_inode(struct inode *inode)
264 if (S_ISREG(inode->i_mode)) {
267 struct lov_stripe_md *md = ll_i2info(inode)->lli_smd;
272 if (md->lmd_object_id == 0) {
273 CERROR("This really happens\n");
274 /* No obdo was ever created */
282 oa->o_id = md->lmd_object_id;
283 oa->o_easize = md->lmd_easize;
284 oa->o_mode = inode->i_mode;
285 oa->o_valid = OBD_MD_FLID | OBD_MD_FLEASIZE | OBD_MD_FLMODE;
287 err = obd_destroy(ll_i2obdconn(inode), oa, md);
289 CDEBUG(D_SUPER, "obd destroy of %Ld error %d\n",
290 md->lmd_object_id, err);
296 /* like inode_setattr, but doesn't mark the inode dirty */
297 static int ll_attr2inode(struct inode * inode, struct iattr * attr, int trunc)
299 unsigned int ia_valid = attr->ia_valid;
302 if ((ia_valid & ATTR_SIZE) && trunc) {
303 error = vmtruncate(inode, attr->ia_size);
306 } else if (ia_valid & ATTR_SIZE)
307 inode->i_size = attr->ia_size;
309 if (ia_valid & ATTR_UID)
310 inode->i_uid = attr->ia_uid;
311 if (ia_valid & ATTR_GID)
312 inode->i_gid = attr->ia_gid;
313 if (ia_valid & ATTR_ATIME)
314 inode->i_atime = attr->ia_atime;
315 if (ia_valid & ATTR_MTIME)
316 inode->i_mtime = attr->ia_mtime;
317 if (ia_valid & ATTR_CTIME)
318 inode->i_ctime = attr->ia_ctime;
319 if (ia_valid & ATTR_MODE) {
320 inode->i_mode = attr->ia_mode;
321 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
322 inode->i_mode &= ~S_ISGID;
328 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
330 struct ptlrpc_request *request = NULL;
331 struct ll_sb_info *sbi = ll_i2sbi(inode);
336 /* change incore inode */
337 ll_attr2inode(inode, attr, do_trunc);
339 err = mdc_setattr(&sbi->ll_mdc_conn, inode, attr, &request);
341 CERROR("mdc_setattr fails (%d)\n", err);
343 ptlrpc_req_finished(request);
348 int ll_setattr(struct dentry *de, struct iattr *attr)
350 int rc = inode_change_ok(de->d_inode, attr);
355 return ll_inode_setattr(de->d_inode, attr, 1);
358 static int ll_statfs(struct super_block *sb, struct statfs *sfs)
360 struct ptlrpc_request *request = NULL;
361 struct ll_sb_info *sbi = ll_s2sbi(sb);
365 memset(sfs, 0, sizeof(*sfs));
366 rc = mdc_statfs(&sbi->ll_mdc_conn, sfs, &request);
367 ptlrpc_req_finished(request);
369 CERROR("obd_statfs fails: rc = %d\n", rc);
371 CDEBUG(D_SUPER, "statfs shows blocks %ld/%ld objects %ld/%ld\n",
372 sfs->f_bavail, sfs->f_blocks, sfs->f_files,sfs->f_ffree);
374 /* temporary until mds_statfs returns statfs info for all OSTs */
376 struct statfs obd_sfs;
378 rc = obd_statfs(&sbi->ll_osc_conn, &obd_sfs);
380 CERROR("obd_statfs fails: rc = %d\n", rc);
383 CDEBUG(D_SUPER, "obd_statfs returns blocks %ld/%ld, "
385 obd_sfs.f_bavail, obd_sfs.f_blocks,
386 obd_sfs.f_ffree, obd_sfs.f_files);
388 sfs->f_bfree = obd_sfs.f_bfree;
389 sfs->f_bavail = obd_sfs.f_bavail;
390 sfs->f_blocks = obd_sfs.f_blocks;
391 if (obd_sfs.f_ffree < sfs->f_ffree)
392 sfs->f_ffree = obd_sfs.f_ffree;
399 inline int ll_stripe_md_size(struct super_block *sb)
401 struct client_obd *mdc = sbi2mdc(ll_s2sbi(sb));
402 return mdc->cl_max_mdsize;
405 static void ll_read_inode2(struct inode *inode, void *opaque)
407 struct ll_inode_md *md = opaque;
408 struct mds_body *body = md->body;
409 struct ll_inode_info *ii = ll_i2info(inode);
412 sema_init(&ii->lli_open_sem, 1);
413 INIT_LIST_HEAD(&ii->lli_osc_locks);
415 /* core attributes first */
416 if (body->valid & OBD_MD_FLID)
417 inode->i_ino = body->ino;
418 if (body->valid & OBD_MD_FLATIME)
419 inode->i_atime = body->atime;
420 if (body->valid & OBD_MD_FLMTIME)
421 inode->i_mtime = body->mtime;
422 if (body->valid & OBD_MD_FLCTIME)
423 inode->i_ctime = body->ctime;
424 if (body->valid & OBD_MD_FLSIZE)
425 inode->i_size = body->size;
426 if (body->valid & OBD_MD_FLMODE)
427 inode->i_mode = body->mode;
428 if (body->valid & OBD_MD_FLUID)
429 inode->i_uid = body->uid;
430 if (body->valid & OBD_MD_FLGID)
431 inode->i_gid = body->gid;
432 if (body->valid & OBD_MD_FLFLAGS)
433 inode->i_flags = body->flags;
434 if (body->valid & OBD_MD_FLNLINK)
435 inode->i_nlink = body->nlink;
436 if (body->valid & OBD_MD_FLGENER)
437 inode->i_generation = body->generation;
438 if (body->valid & OBD_MD_FLRDEV)
439 inode->i_rdev = body->extra;
440 //if (body->valid & OBD_MD_FLEASIZE)
441 if (md && md->md && md->md->lmd_stripe_count) {
442 struct lov_stripe_md *smd = md->md;
443 int size = ll_stripe_md_size(inode->i_sb);
444 if (md->md->lmd_easize != size) {
445 CERROR("Striping metadata size error %ld\n",
449 OBD_ALLOC(ii->lli_smd, size);
451 CERROR("No memory for %d\n", size);
454 memcpy(ii->lli_smd, smd, size);
457 /* OIDEBUG(inode); */
459 if (S_ISREG(inode->i_mode)) {
460 inode->i_op = &ll_file_inode_operations;
461 inode->i_fop = &ll_file_operations;
462 inode->i_mapping->a_ops = &ll_aops;
464 } else if (S_ISDIR(inode->i_mode)) {
465 inode->i_op = &ll_dir_inode_operations;
466 inode->i_fop = &ll_dir_operations;
467 inode->i_mapping->a_ops = &ll_dir_aops;
469 } else if (S_ISLNK(inode->i_mode)) {
470 inode->i_op = &ll_fast_symlink_inode_operations;
473 init_special_inode(inode, inode->i_mode, inode->i_rdev);
480 /* exported operations */
481 struct super_operations ll_super_operations =
483 read_inode2: ll_read_inode2,
484 clear_inode: ll_clear_inode,
485 delete_inode: ll_delete_inode,
486 put_super: ll_put_super,
490 struct file_system_type lustre_lite_fs_type = {
491 "lustre_lite", 0, ll_read_super, NULL
494 static int __init init_lustre_lite(void)
496 printk(KERN_INFO "Lustre Lite 0.0.1, info@clusterfs.com\n");
497 ll_file_data_slab = kmem_cache_create("ll_file_data",
498 sizeof(struct ll_file_data), 0,
499 SLAB_HWCACHE_ALIGN, NULL, NULL);
500 if (ll_file_data_slab == NULL)
502 return register_filesystem(&lustre_lite_fs_type);
505 static void __exit exit_lustre_lite(void)
507 unregister_filesystem(&lustre_lite_fs_type);
508 kmem_cache_destroy(ll_file_data_slab);
511 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
512 MODULE_DESCRIPTION("Lustre Lite Client File System v1.0");
513 MODULE_LICENSE("GPL");
515 module_init(init_lustre_lite);
516 module_exit(exit_lustre_lite);