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/version.h>
17 #include <linux/lustre_lite.h>
18 #include <linux/lustre_ha.h>
19 #include <linux/obd_lov.h>
20 #include <linux/lustre_dlm.h>
21 #include <linux/init.h>
24 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
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 int ll_recover(struct recovd_data *, int);
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_SUPER, "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 int ll_set_opt(const char *opt, char *data, int fl)
62 CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
63 if ( strncmp(opt, data, strlen(opt)) )
69 static void ll_options(char *options, char **ost, char **mds, int *flags)
79 for (this_char = strtok (options, ",");
81 this_char = strtok (NULL, ",")) {
82 CDEBUG(D_SUPER, "this_char %s\n", this_char);
83 if ( (!*ost && (*ost = ll_read_opt("osc", this_char)))||
84 (!*mds && (*mds = ll_read_opt("mdc", this_char)))||
85 (!(*flags & LL_SBI_NOLCK) && ((*flags) = (*flags) |
86 ll_set_opt("nolock", this_char, LL_SBI_NOLCK))) )
93 #define log2(n) ffz(~(n))
96 static struct super_block * ll_read_super(struct super_block *sb,
97 void *data, int silent)
99 struct inode *root = 0;
100 struct obd_device *obd;
101 struct ll_sb_info *sbi;
105 struct ll_fid rootfid;
106 struct obd_statfs osfs;
107 struct ptlrpc_request *request = NULL;
108 struct ptlrpc_connection *mdc_conn;
109 struct ll_read_inode2_cookie lic;
115 OBD_ALLOC(sbi, sizeof(*sbi));
121 INIT_LIST_HEAD(&sbi->ll_conn_chain);
122 generate_random_uuid(uuid);
123 class_uuid_unparse(uuid, sbi->ll_sb_uuid);
125 sb->u.generic_sbp = sbi;
127 ll_options(data, &osc, &mdc, &sbi->ll_flags);
131 GOTO(out_free, sb = NULL);
136 GOTO(out_free, sb = NULL);
139 obd = class_uuid2obd(mdc);
141 CERROR("MDC %s: not setup or attached\n", mdc);
142 GOTO(out_free, sb = NULL);
145 err = obd_connect(&sbi->ll_mdc_conn, obd, sbi->ll_sb_uuid,
146 ptlrpc_recovd, ll_recover);
148 CERROR("cannot connect to %s: rc = %d\n", mdc, err);
149 GOTO(out_free, sb = NULL);
152 #warning Peter: is this the right place to raise the connection level?
153 mdc_conn = sbi2mdc(sbi)->cl_import.imp_connection;
154 mdc_conn->c_level = LUSTRE_CONN_FULL;
155 list_add(&mdc_conn->c_sb_chain, &sbi->ll_conn_chain);
157 obd = class_uuid2obd(osc);
159 CERROR("OSC %s: not setup or attached\n", osc);
160 GOTO(out_mdc, sb = NULL);
163 err = obd_connect(&sbi->ll_osc_conn, obd, sbi->ll_sb_uuid,
164 ptlrpc_recovd, ll_recover);
166 CERROR("cannot connect to %s: rc = %d\n", osc, err);
167 GOTO(out_mdc, sb = NULL);
170 err = mdc_getstatus(&sbi->ll_mdc_conn, &rootfid);
172 CERROR("cannot mds_connect: rc = %d\n", err);
173 GOTO(out_mdc, sb = NULL);
175 CDEBUG(D_SUPER, "rootfid "LPU64"\n", rootfid.id);
176 sbi->ll_rootino = rootfid.id;
178 memset(&osfs, 0, sizeof(osfs));
179 err = obd_statfs(&sbi->ll_mdc_conn, &osfs);
180 sb->s_blocksize = osfs.os_bsize;
181 sb->s_blocksize_bits = log2(osfs.os_bsize);
182 sb->s_magic = LL_SUPER_MAGIC;
183 sb->s_maxbytes = (1ULL << (32 + 9)) - osfs.os_bsize;
185 sb->s_op = &ll_super_operations;
187 /* make root inode */
188 err = mdc_getattr(&sbi->ll_mdc_conn, sbi->ll_rootino, S_IFDIR,
189 OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS, 0, &request);
191 CERROR("mdc_getattr failed for root: rc = %d\n", err);
192 GOTO(out_request, sb = NULL);
195 /* initialize committed transaction callback daemon */
196 spin_lock_init(&sbi->ll_commitcbd_lock);
197 init_waitqueue_head(&sbi->ll_commitcbd_waitq);
198 init_waitqueue_head(&sbi->ll_commitcbd_ctl_waitq);
199 sbi->ll_commitcbd_flags = 0;
200 err = ll_commitcbd_setup(sbi);
202 CERROR("failed to start commit callback daemon: rc = %d\n",err);
203 GOTO(out_request, sb = NULL);
206 lic.lic_body = lustre_msg_buf(request->rq_repmsg, 0);
208 LASSERT(sbi->ll_rootino != 0);
209 root = iget4(sb, sbi->ll_rootino, NULL, &lic);
212 sb->s_root = d_alloc_root(root);
214 CERROR("lustre_lite: bad iget4 for root\n");
215 GOTO(out_cdb, sb = NULL);
218 ptlrpc_req_finished(request);
223 OBD_FREE(mdc, strlen(mdc) + 1);
225 OBD_FREE(osc, strlen(osc) + 1);
230 ll_commitcbd_cleanup(sbi);
232 ptlrpc_req_finished(request);
233 obd_disconnect(&sbi->ll_osc_conn);
235 obd_disconnect(&sbi->ll_mdc_conn);
237 OBD_FREE(sbi, sizeof(*sbi));
241 } /* ll_read_super */
243 static void ll_put_super(struct super_block *sb)
245 struct ll_sb_info *sbi = ll_s2sbi(sb);
246 struct ll_fid rootfid;
249 list_del(&sbi->ll_conn_chain);
250 ll_commitcbd_cleanup(sbi);
251 obd_disconnect(&sbi->ll_osc_conn);
253 /* NULL request to force sync on the MDS, and get the last_committed
254 * value to flush remaining RPCs from the sending queue on client.
256 * XXX This should be an mdc_sync() call to sync the whole MDS fs,
257 * which we can call for other reasons as well.
259 mdc_getstatus(&sbi->ll_mdc_conn, &rootfid);
261 obd_disconnect(&sbi->ll_mdc_conn);
262 OBD_FREE(sbi, sizeof(*sbi));
268 static void ll_clear_inode(struct inode *inode)
270 struct ll_sb_info *sbi = ll_i2sbi(inode);
274 rc = mdc_cancel_unused(&sbi->ll_mdc_conn, inode, LDLM_FL_NO_CALLBACK);
276 CERROR("obd_cancel_unused: %d\n", rc);
277 /* XXX FIXME do something dramatic */
280 if (atomic_read(&inode->i_count) == 0) {
281 struct ll_inode_info *lli = ll_i2info(inode);
282 struct lov_stripe_md *lsm = lli->lli_smd;
283 char *symlink_name = lli->lli_symlink_name;
286 OBD_FREE(lsm, ll_ost_easize(inode->i_sb));
290 OBD_FREE(symlink_name, strlen(symlink_name) + 1);
291 lli->lli_symlink_name = NULL;
298 static void ll_delete_inode(struct inode *inode)
301 if (S_ISREG(inode->i_mode)) {
304 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
309 if (lsm->lsm_object_id == 0) {
310 CERROR("This really happens\n");
311 /* No obdo was ever created */
319 oa->o_id = lsm->lsm_object_id;
320 oa->o_easize = ll_mds_easize(inode->i_sb);
321 oa->o_mode = inode->i_mode;
322 oa->o_valid = OBD_MD_FLID | OBD_MD_FLEASIZE | OBD_MD_FLTYPE;
324 err = obd_destroy(ll_i2obdconn(inode), oa, lsm);
326 CDEBUG(D_SUPER, "obd destroy of objid "LPX64" error %d\n",
327 lsm->lsm_object_id, err);
334 /* like inode_setattr, but doesn't mark the inode dirty */
335 static int ll_attr2inode(struct inode * inode, struct iattr * attr, int trunc)
337 unsigned int ia_valid = attr->ia_valid;
340 if ((ia_valid & ATTR_SIZE) && trunc) {
341 error = vmtruncate(inode, attr->ia_size);
344 } else if (ia_valid & ATTR_SIZE)
345 inode->i_size = attr->ia_size;
347 if (ia_valid & ATTR_UID)
348 inode->i_uid = attr->ia_uid;
349 if (ia_valid & ATTR_GID)
350 inode->i_gid = attr->ia_gid;
351 if (ia_valid & ATTR_ATIME)
352 inode->i_atime = attr->ia_atime;
353 if (ia_valid & ATTR_MTIME)
354 inode->i_mtime = attr->ia_mtime;
355 if (ia_valid & ATTR_CTIME)
356 inode->i_ctime = attr->ia_ctime;
357 if (ia_valid & ATTR_MODE) {
358 inode->i_mode = attr->ia_mode;
359 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
360 inode->i_mode &= ~S_ISGID;
366 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
368 struct ptlrpc_request *request = NULL;
369 struct ll_sb_info *sbi = ll_i2sbi(inode);
374 /* change incore inode */
375 ll_attr2inode(inode, attr, do_trunc);
377 err = mdc_setattr(&sbi->ll_mdc_conn, inode, attr, &request);
379 CERROR("mdc_setattr fails (%d)\n", err);
381 ptlrpc_req_finished(request);
386 int ll_setattr(struct dentry *de, struct iattr *attr)
388 int rc = inode_change_ok(de->d_inode, attr);
393 return ll_inode_setattr(de->d_inode, attr, 1);
396 static int ll_statfs(struct super_block *sb, struct statfs *sfs)
398 struct ll_sb_info *sbi = ll_s2sbi(sb);
399 struct obd_statfs osfs;
403 memset(sfs, 0, sizeof(*sfs));
404 rc = obd_statfs(&sbi->ll_mdc_conn, &osfs);
405 statfs_unpack(sfs, &osfs);
407 CERROR("mdc_statfs fails: rc = %d\n", rc);
409 CDEBUG(D_SUPER, "mdc_statfs shows blocks "LPU64"/"LPU64
410 " objects "LPU64"/"LPU64"\n",
411 osfs.os_bavail, osfs.os_blocks,
412 osfs.os_ffree, osfs.os_files);
414 /* temporary until mds_statfs returns statfs info for all OSTs */
416 rc = obd_statfs(&sbi->ll_osc_conn, &osfs);
418 CERROR("obd_statfs fails: rc = %d\n", rc);
421 CDEBUG(D_SUPER, "obd_statfs shows blocks "LPU64"/"LPU64
422 " objects "LPU64"/"LPU64"\n",
423 osfs.os_bavail, osfs.os_blocks,
424 osfs.os_ffree, osfs.os_files);
426 while (osfs.os_blocks > ~0UL) {
429 osfs.os_blocks >>= 1;
431 osfs.os_bavail >>= 1;
433 sfs->f_blocks = osfs.os_blocks;
434 sfs->f_bfree = osfs.os_bfree;
435 sfs->f_bavail = osfs.os_bavail;
436 if (osfs.os_ffree < (__u64)sfs->f_ffree)
437 sfs->f_ffree = osfs.os_ffree;
444 void ll_update_inode(struct inode *inode, struct mds_body *body)
446 if (body->valid & OBD_MD_FLID)
447 inode->i_ino = body->ino;
448 if (body->valid & OBD_MD_FLATIME)
449 inode->i_atime = body->atime;
450 if (body->valid & OBD_MD_FLMTIME)
451 inode->i_mtime = body->mtime;
452 if (body->valid & OBD_MD_FLCTIME)
453 inode->i_ctime = body->ctime;
454 if (body->valid & OBD_MD_FLMODE)
455 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
456 if (body->valid & OBD_MD_FLTYPE)
457 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
458 if (body->valid & OBD_MD_FLUID)
459 inode->i_uid = body->uid;
460 if (body->valid & OBD_MD_FLGID)
461 inode->i_gid = body->gid;
462 if (body->valid & OBD_MD_FLFLAGS)
463 inode->i_flags = body->flags;
464 if (body->valid & OBD_MD_FLNLINK)
465 inode->i_nlink = body->nlink;
466 if (body->valid & OBD_MD_FLGENER)
467 inode->i_generation = body->generation;
468 if (body->valid & OBD_MD_FLRDEV)
469 inode->i_rdev = body->rdev;
470 if (body->valid & OBD_MD_FLSIZE)
471 inode->i_size = body->size;
474 static void ll_read_inode2(struct inode *inode, void *opaque)
476 struct ll_read_inode2_cookie *lic = opaque;
477 struct mds_body *body = lic->lic_body;
478 struct ll_inode_info *lli = ll_i2info(inode);
481 sema_init(&lli->lli_open_sem, 1);
483 /* core attributes first */
484 ll_update_inode(inode, body);
486 //if (body->valid & OBD_MD_FLEASIZE)
487 if (lic && lic->lic_lmm) {
488 struct lov_mds_md *lmm = lic->lic_lmm;
491 /* XXX This should probably not be an error in the future,
492 * when we allow LOV OSTs to be added.
494 if (lmm->lmm_easize != ll_mds_easize(inode->i_sb)) {
495 CERROR("Striping metadata size error %ld\n",
499 size = ll_ost_easize(inode->i_sb);
500 OBD_ALLOC(lli->lli_smd, size);
502 CERROR("No memory for %d\n", size);
505 lov_unpackmd(lli->lli_smd, lmm);
510 /* Get the authoritative file size */
511 if (lli->lli_smd && (inode->i_mode & S_IFREG)) {
514 rc = ll_file_size(inode, lli->lli_smd);
516 CERROR("ll_file_size: %d\n", rc);
517 /* FIXME: need to somehow prevent inode creation */
522 /* OIDEBUG(inode); */
524 if (S_ISREG(inode->i_mode)) {
525 inode->i_op = &ll_file_inode_operations;
526 inode->i_fop = &ll_file_operations;
527 inode->i_mapping->a_ops = &ll_aops;
529 } else if (S_ISDIR(inode->i_mode)) {
530 inode->i_op = &ll_dir_inode_operations;
531 inode->i_fop = &ll_dir_operations;
532 inode->i_mapping->a_ops = &ll_dir_aops;
534 } else if (S_ISLNK(inode->i_mode)) {
535 inode->i_op = &ll_fast_symlink_inode_operations;
538 init_special_inode(inode, inode->i_mode, inode->i_rdev);
543 static inline void invalidate_request_list(struct list_head *req_list)
545 struct list_head *tmp, *n;
546 list_for_each_safe(tmp, n, req_list) {
547 struct ptlrpc_request *req =
548 list_entry(tmp, struct ptlrpc_request, rq_list);
549 CERROR("invalidating req xid "LPD64" op %d to %s:%d\n",
550 (unsigned long long)req->rq_xid, req->rq_reqmsg->opc,
551 req->rq_connection->c_remote_uuid,
552 req->rq_import->imp_client->cli_request_portal);
553 req->rq_flags |= PTL_RPC_FL_ERR;
554 wake_up(&req->rq_wait_for_rep);
558 void ll_umount_begin(struct super_block *sb)
560 struct ll_sb_info *sbi = ll_s2sbi(sb);
561 struct list_head *ctmp;
565 list_for_each(ctmp, &sbi->ll_conn_chain) {
566 struct ptlrpc_connection *conn;
567 conn = list_entry(ctmp, struct ptlrpc_connection, c_sb_chain);
569 spin_lock(&conn->c_lock);
570 /* XXX should just be dealing with imports, probably through
571 * XXX iocontrol, need next-gen recovery! */
572 conn->c_flags |= CONN_INVALID;
573 invalidate_request_list(&conn->c_sending_head);
574 invalidate_request_list(&conn->c_delayed_head);
575 spin_unlock(&conn->c_lock);
581 /* exported operations */
582 struct super_operations ll_super_operations =
584 read_inode2: ll_read_inode2,
585 clear_inode: ll_clear_inode,
586 delete_inode: ll_delete_inode,
587 put_super: ll_put_super,
589 umount_begin: ll_umount_begin
592 struct file_system_type lustre_lite_fs_type = {
593 "lustre_lite", 0, ll_read_super, NULL
596 static int __init init_lustre_lite(void)
598 printk(KERN_INFO "Lustre Lite 0.5.14, info@clusterfs.com\n");
599 ll_file_data_slab = kmem_cache_create("ll_file_data",
600 sizeof(struct ll_file_data), 0,
601 SLAB_HWCACHE_ALIGN, NULL, NULL);
602 if (ll_file_data_slab == NULL)
604 return register_filesystem(&lustre_lite_fs_type);
607 static void __exit exit_lustre_lite(void)
609 unregister_filesystem(&lustre_lite_fs_type);
610 kmem_cache_destroy(ll_file_data_slab);
613 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
614 MODULE_DESCRIPTION("Lustre Lite Client File System v1.0");
615 MODULE_LICENSE("GPL");
617 module_init(init_lustre_lite);
618 module_exit(exit_lustre_lite);