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 __u64 last_committed;
109 struct ptlrpc_request *request = NULL;
110 struct ptlrpc_connection *mdc_conn;
111 struct ll_read_inode2_cookie lic;
117 OBD_ALLOC(sbi, sizeof(*sbi));
123 INIT_LIST_HEAD(&sbi->ll_conn_chain);
124 generate_random_uuid(uuid);
125 class_uuid_unparse(uuid, sbi->ll_sb_uuid);
127 sb->u.generic_sbp = sbi;
129 ll_options(data, &osc, &mdc, &sbi->ll_flags);
133 GOTO(out_free, sb = NULL);
138 GOTO(out_free, sb = NULL);
141 obd = class_uuid2obd(mdc);
143 CERROR("MDC %s: not setup or attached\n", mdc);
144 GOTO(out_free, sb = NULL);
147 err = obd_connect(&sbi->ll_mdc_conn, obd, sbi->ll_sb_uuid,
148 ptlrpc_recovd, ll_recover);
150 CERROR("cannot connect to %s: rc = %d\n", mdc, err);
151 GOTO(out_free, sb = NULL);
154 #warning Peter: is this the right place to raise the connection level?
155 mdc_conn = sbi2mdc(sbi)->cl_import.imp_connection;
156 mdc_conn->c_level = LUSTRE_CONN_FULL;
157 list_add(&mdc_conn->c_sb_chain, &sbi->ll_conn_chain);
159 obd = class_uuid2obd(osc);
161 CERROR("OSC %s: not setup or attached\n", osc);
162 GOTO(out_mdc, sb = NULL);
165 err = obd_connect(&sbi->ll_osc_conn, obd, sbi->ll_sb_uuid,
166 ptlrpc_recovd, ll_recover);
168 CERROR("cannot connect to %s: rc = %d\n", osc, err);
169 GOTO(out_mdc, sb = NULL);
172 /* XXX: need to store the last_* values somewhere */
173 err = mdc_getstatus(&sbi->ll_mdc_conn, &rootfid, &last_committed,
174 &last_xid, &request);
175 ptlrpc_req_finished(request);
177 CERROR("cannot mds_connect: rc = %d\n", err);
178 GOTO(out_mdc, sb = NULL);
180 CDEBUG(D_SUPER, "rootfid %Ld\n", (unsigned long long)rootfid.id);
181 sbi->ll_rootino = rootfid.id;
183 memset(&osfs, 0, sizeof(osfs));
185 err = mdc_statfs(&sbi->ll_mdc_conn, &osfs, &request);
186 ptlrpc_req_finished(request);
187 sb->s_blocksize = osfs.os_bsize;
188 sb->s_blocksize_bits = log2(osfs.os_bsize);
189 sb->s_magic = LL_SUPER_MAGIC;
190 sb->s_maxbytes = (1ULL << (32 + 9)) - osfs.os_bsize;
192 sb->s_op = &ll_super_operations;
194 /* make root inode */
196 err = mdc_getattr(&sbi->ll_mdc_conn, sbi->ll_rootino, S_IFDIR,
197 OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS, 0, &request);
199 CERROR("mdc_getattr failed for root: rc = %d\n", err);
200 GOTO(out_request, sb = NULL);
203 /* initialize committed transaction callback daemon */
204 spin_lock_init(&sbi->ll_commitcbd_lock);
205 init_waitqueue_head(&sbi->ll_commitcbd_waitq);
206 init_waitqueue_head(&sbi->ll_commitcbd_ctl_waitq);
207 sbi->ll_commitcbd_flags = 0;
208 err = ll_commitcbd_setup(sbi);
210 CERROR("failed to start commit callback daemon: rc = %d\n",err);
211 GOTO(out_request, sb = NULL);
214 lic.lic_body = lustre_msg_buf(request->rq_repmsg, 0);
216 LASSERT(sbi->ll_rootino != 0);
217 root = iget4(sb, sbi->ll_rootino, NULL, &lic);
220 sb->s_root = d_alloc_root(root);
222 CERROR("lustre_lite: bad iget4 for root\n");
223 GOTO(out_cdb, sb = NULL);
226 ptlrpc_req_finished(request);
230 OBD_FREE(mdc, strlen(mdc) + 1);
232 OBD_FREE(osc, strlen(osc) + 1);
237 ll_commitcbd_cleanup(sbi);
239 ptlrpc_req_finished(request);
240 obd_disconnect(&sbi->ll_osc_conn);
242 obd_disconnect(&sbi->ll_mdc_conn);
244 OBD_FREE(sbi, sizeof(*sbi));
248 } /* ll_read_super */
250 static void ll_put_super(struct super_block *sb)
252 struct ll_sb_info *sbi = ll_s2sbi(sb);
255 list_del(&sbi->ll_conn_chain);
256 ll_commitcbd_cleanup(sbi);
257 obd_disconnect(&sbi->ll_osc_conn);
258 obd_disconnect(&sbi->ll_mdc_conn);
259 OBD_FREE(sbi, sizeof(*sbi));
265 static void ll_clear_inode(struct inode *inode)
267 struct ll_sb_info *sbi = ll_i2sbi(inode);
271 rc = mdc_cancel_unused(&sbi->ll_mdc_conn, inode, LDLM_FL_NO_CALLBACK);
273 CERROR("obd_cancel_unused: %d\n", rc);
274 /* XXX FIXME do something dramatic */
277 if (atomic_read(&inode->i_count) == 0) {
278 struct ll_inode_info *lli = ll_i2info(inode);
279 struct lov_stripe_md *lsm = lli->lli_smd;
280 char *symlink_name = lli->lli_symlink_name;
283 OBD_FREE(lsm, ll_ost_easize(inode->i_sb));
287 OBD_FREE(symlink_name, strlen(symlink_name) + 1);
288 lli->lli_symlink_name = NULL;
295 static void ll_delete_inode(struct inode *inode)
298 if (S_ISREG(inode->i_mode)) {
301 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
306 if (lsm->lsm_object_id == 0) {
307 CERROR("This really happens\n");
308 /* No obdo was ever created */
316 oa->o_id = lsm->lsm_object_id;
317 oa->o_easize = ll_mds_easize(inode->i_sb);
318 oa->o_mode = inode->i_mode;
319 oa->o_valid = OBD_MD_FLID | OBD_MD_FLEASIZE | OBD_MD_FLTYPE;
321 err = obd_destroy(ll_i2obdconn(inode), oa, lsm);
323 CDEBUG(D_SUPER, "obd destroy of objid "LPX64" error %d\n",
324 lsm->lsm_object_id, err);
331 /* like inode_setattr, but doesn't mark the inode dirty */
332 static int ll_attr2inode(struct inode * inode, struct iattr * attr, int trunc)
334 unsigned int ia_valid = attr->ia_valid;
337 if ((ia_valid & ATTR_SIZE) && trunc) {
338 error = vmtruncate(inode, attr->ia_size);
341 } else if (ia_valid & ATTR_SIZE)
342 inode->i_size = attr->ia_size;
344 if (ia_valid & ATTR_UID)
345 inode->i_uid = attr->ia_uid;
346 if (ia_valid & ATTR_GID)
347 inode->i_gid = attr->ia_gid;
348 if (ia_valid & ATTR_ATIME)
349 inode->i_atime = attr->ia_atime;
350 if (ia_valid & ATTR_MTIME)
351 inode->i_mtime = attr->ia_mtime;
352 if (ia_valid & ATTR_CTIME)
353 inode->i_ctime = attr->ia_ctime;
354 if (ia_valid & ATTR_MODE) {
355 inode->i_mode = attr->ia_mode;
356 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
357 inode->i_mode &= ~S_ISGID;
363 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
365 struct ptlrpc_request *request = NULL;
366 struct ll_sb_info *sbi = ll_i2sbi(inode);
371 /* change incore inode */
372 ll_attr2inode(inode, attr, do_trunc);
374 err = mdc_setattr(&sbi->ll_mdc_conn, inode, attr, &request);
376 CERROR("mdc_setattr fails (%d)\n", err);
378 ptlrpc_req_finished(request);
383 int ll_setattr(struct dentry *de, struct iattr *attr)
385 int rc = inode_change_ok(de->d_inode, attr);
390 return ll_inode_setattr(de->d_inode, attr, 1);
393 static int ll_statfs(struct super_block *sb, struct statfs *sfs)
395 struct ptlrpc_request *request = NULL;
396 struct ll_sb_info *sbi = ll_s2sbi(sb);
397 struct obd_statfs osfs;
401 memset(sfs, 0, sizeof(*sfs));
402 rc = mdc_statfs(&sbi->ll_mdc_conn, &osfs, &request);
403 statfs_unpack(sfs, &osfs);
404 ptlrpc_req_finished(request);
406 CERROR("mdc_statfs fails: rc = %d\n", rc);
408 CDEBUG(D_SUPER, "mdc_statfs shows blocks "LPU64"/"LPU64
409 " objects "LPU64"/"LPU64"\n",
410 osfs.os_bavail, osfs.os_blocks,
411 osfs.os_ffree, osfs.os_files);
413 /* temporary until mds_statfs returns statfs info for all OSTs */
415 rc = obd_statfs(&sbi->ll_osc_conn, &osfs);
417 CERROR("obd_statfs fails: rc = %d\n", rc);
420 CDEBUG(D_SUPER, "obd_statfs shows blocks "LPU64"/"LPU64
421 " objects "LPU64"/"LPU64"\n",
422 osfs.os_bavail, osfs.os_blocks,
423 osfs.os_ffree, osfs.os_files);
425 while (osfs.os_blocks > ~0UL) {
428 osfs.os_blocks >>= 1;
430 osfs.os_bavail >>= 1;
432 sfs->f_blocks = osfs.os_blocks;
433 sfs->f_bfree = osfs.os_bfree;
434 sfs->f_bavail = osfs.os_bavail;
435 if (osfs.os_ffree < (__u64)sfs->f_ffree)
436 sfs->f_ffree = osfs.os_ffree;
443 void ll_update_inode(struct inode *inode, struct mds_body *body)
445 if (body->valid & OBD_MD_FLID)
446 inode->i_ino = body->ino;
447 if (body->valid & OBD_MD_FLATIME)
448 inode->i_atime = body->atime;
449 if (body->valid & OBD_MD_FLMTIME)
450 inode->i_mtime = body->mtime;
451 if (body->valid & OBD_MD_FLCTIME)
452 inode->i_ctime = body->ctime;
453 if (body->valid & OBD_MD_FLMODE)
454 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
455 if (body->valid & OBD_MD_FLTYPE)
456 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
457 if (body->valid & OBD_MD_FLUID)
458 inode->i_uid = body->uid;
459 if (body->valid & OBD_MD_FLGID)
460 inode->i_gid = body->gid;
461 if (body->valid & OBD_MD_FLFLAGS)
462 inode->i_flags = body->flags;
463 if (body->valid & OBD_MD_FLNLINK)
464 inode->i_nlink = body->nlink;
465 if (body->valid & OBD_MD_FLGENER)
466 inode->i_generation = body->generation;
467 if (body->valid & OBD_MD_FLRDEV)
468 inode->i_rdev = body->rdev;
469 if (body->valid & OBD_MD_FLSIZE)
470 inode->i_size = body->size;
473 static void ll_read_inode2(struct inode *inode, void *opaque)
475 struct ll_read_inode2_cookie *lic = opaque;
476 struct mds_body *body = lic->lic_body;
477 struct ll_inode_info *lli = ll_i2info(inode);
480 sema_init(&lli->lli_open_sem, 1);
482 /* core attributes first */
483 ll_update_inode(inode, body);
485 //if (body->valid & OBD_MD_FLEASIZE)
486 if (lic && lic->lic_lmm) {
487 struct lov_mds_md *lmm = lic->lic_lmm;
490 if (lmm->lmm_easize != ll_mds_easize(inode->i_sb)) {
491 CERROR("Striping metadata size error %ld\n",
495 size = ll_ost_easize(inode->i_sb);
496 OBD_ALLOC(lli->lli_smd, size);
498 CERROR("No memory for %d\n", size);
501 lov_unpackmd(lli->lli_smd, lmm);
506 /* Get the authoritative file size */
507 if (lli->lli_smd && (inode->i_mode & S_IFREG)) {
510 rc = ll_file_size(inode, lli->lli_smd);
512 CERROR("ll_file_size: %d\n", rc);
513 /* FIXME: need to somehow prevent inode creation */
518 /* OIDEBUG(inode); */
520 if (S_ISREG(inode->i_mode)) {
521 inode->i_op = &ll_file_inode_operations;
522 inode->i_fop = &ll_file_operations;
523 inode->i_mapping->a_ops = &ll_aops;
525 } else if (S_ISDIR(inode->i_mode)) {
526 inode->i_op = &ll_dir_inode_operations;
527 inode->i_fop = &ll_dir_operations;
528 inode->i_mapping->a_ops = &ll_dir_aops;
530 } else if (S_ISLNK(inode->i_mode)) {
531 inode->i_op = &ll_fast_symlink_inode_operations;
534 init_special_inode(inode, inode->i_mode, inode->i_rdev);
539 static inline void invalidate_request_list(struct list_head *req_list)
541 struct list_head *tmp, *n;
542 list_for_each_safe(tmp, n, req_list) {
543 struct ptlrpc_request *req =
544 list_entry(tmp, struct ptlrpc_request, rq_list);
545 CERROR("invalidating req xid "LPD64" op %d to %s:%d\n",
546 (unsigned long long)req->rq_xid, req->rq_reqmsg->opc,
547 req->rq_connection->c_remote_uuid,
548 req->rq_import->imp_client->cli_request_portal);
549 req->rq_flags |= PTL_RPC_FL_ERR;
550 wake_up(&req->rq_wait_for_rep);
554 void ll_umount_begin(struct super_block *sb)
556 struct ll_sb_info *sbi = ll_s2sbi(sb);
557 struct list_head *ctmp;
561 list_for_each(ctmp, &sbi->ll_conn_chain) {
562 struct ptlrpc_connection *conn;
563 conn = list_entry(ctmp, struct ptlrpc_connection, c_sb_chain);
565 spin_lock(&conn->c_lock);
566 /* XXX should just be dealing with imports, probably through
567 * XXX iocontrol, need next-gen recovery! */
568 conn->c_flags |= CONN_INVALID;
569 invalidate_request_list(&conn->c_sending_head);
570 invalidate_request_list(&conn->c_delayed_head);
571 spin_unlock(&conn->c_lock);
577 /* exported operations */
578 struct super_operations ll_super_operations =
580 read_inode2: ll_read_inode2,
581 clear_inode: ll_clear_inode,
582 delete_inode: ll_delete_inode,
583 put_super: ll_put_super,
585 umount_begin: ll_umount_begin
588 struct file_system_type lustre_lite_fs_type = {
589 "lustre_lite", 0, ll_read_super, NULL
592 static int __init init_lustre_lite(void)
594 printk(KERN_INFO "Lustre Lite 0.5.14, info@clusterfs.com\n");
595 ll_file_data_slab = kmem_cache_create("ll_file_data",
596 sizeof(struct ll_file_data), 0,
597 SLAB_HWCACHE_ALIGN, NULL, NULL);
598 if (ll_file_data_slab == NULL)
600 return register_filesystem(&lustre_lite_fs_type);
603 static void __exit exit_lustre_lite(void)
605 unregister_filesystem(&lustre_lite_fs_type);
606 kmem_cache_destroy(ll_file_data_slab);
609 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
610 MODULE_DESCRIPTION("Lustre Lite Client File System v1.0");
611 MODULE_LICENSE("GPL");
613 module_init(init_lustre_lite);
614 module_exit(exit_lustre_lite);