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/obd_lov.h>
19 #include <linux/lustre_dlm.h>
20 #include <linux/init.h>
22 kmem_cache_t *ll_file_data_slab;
23 extern struct address_space_operations ll_aops;
24 extern struct address_space_operations ll_dir_aops;
25 struct super_operations ll_super_operations;
27 extern int ll_recover(struct recovd_data *, int);
28 extern int ll_commitcbd_setup(struct ll_sb_info *);
29 extern int ll_commitcbd_cleanup(struct ll_sb_info *);
31 static char *ll_read_opt(const char *opt, char *data)
37 CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
38 if ( strncmp(opt, data, strlen(opt)) )
40 if ( (value = strchr(data, '=')) == NULL )
44 OBD_ALLOC(retval, strlen(value) + 1);
46 CERROR("out of memory!\n");
50 memcpy(retval, value, strlen(value)+1);
51 CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
55 static int ll_set_opt(const char *opt, char *data, int fl)
59 CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
60 if ( strncmp(opt, data, strlen(opt)) )
66 static void ll_options(char *options, char **ost, char **mds, int *flags)
76 for (this_char = strtok (options, ",");
78 this_char = strtok (NULL, ",")) {
79 CDEBUG(D_SUPER, "this_char %s\n", this_char);
80 if ( (!*ost && (*ost = ll_read_opt("osc", this_char)))||
81 (!*mds && (*mds = ll_read_opt("mdc", this_char)))||
82 (!(*flags & LL_SBI_NOLCK) && ((*flags) = (*flags) |
83 ll_set_opt("nolock", this_char, LL_SBI_NOLCK))) )
90 #define log2(n) ffz(~(n))
93 static struct super_block * ll_read_super(struct super_block *sb,
94 void *data, int silent)
96 struct inode *root = 0;
97 struct obd_device *obd;
98 struct ll_sb_info *sbi;
102 struct ll_fid rootfid;
103 struct obd_statfs osfs;
104 __u64 last_committed;
106 struct ptlrpc_request *request = NULL;
107 struct ll_inode_md md;
113 OBD_ALLOC(sbi, sizeof(*sbi));
119 generate_random_uuid(uuid);
120 class_uuid_unparse(uuid, sbi->ll_sb_uuid);
122 sb->u.generic_sbp = sbi;
124 ll_options(data, &osc, &mdc, &sbi->ll_flags);
128 GOTO(out_free, sb = NULL);
133 GOTO(out_free, sb = NULL);
136 obd = class_uuid2obd(mdc);
138 CERROR("MDC %s: not setup or attached\n", mdc);
139 GOTO(out_free, sb = NULL);
142 err = obd_connect(&sbi->ll_mdc_conn, obd, sbi->ll_sb_uuid);
144 CERROR("cannot connect to %s: rc = %d\n", mdc, err);
145 GOTO(out_free, sb = NULL);
148 #warning Peter: is this the right place to raise the connection level?
149 sbi2mdc(sbi)->cl_import.imp_connection->c_level = LUSTRE_CONN_FULL;
151 obd = class_uuid2obd(osc);
153 CERROR("OSC %s: not setup or attached\n", osc);
154 GOTO(out_mdc, sb = NULL);
156 err = obd_connect(&sbi->ll_osc_conn, obd, sbi->ll_sb_uuid);
158 CERROR("cannot connect to %s: rc = %d\n", osc, err);
159 GOTO(out_mdc, sb = NULL);
162 /* XXX: need to store the last_* values somewhere */
163 err = mdc_getstatus(&sbi->ll_mdc_conn, &rootfid, &last_committed,
164 &last_xid, &request);
165 ptlrpc_req_finished(request);
167 CERROR("cannot mds_connect: rc = %d\n", err);
168 GOTO(out_mdc, sb = NULL);
170 CDEBUG(D_SUPER, "rootfid %Ld\n", (unsigned long long)rootfid.id);
171 sbi->ll_rootino = rootfid.id;
173 memset(&osfs, 0, sizeof(osfs));
175 err = mdc_statfs(&sbi->ll_mdc_conn, &osfs, &request);
176 ptlrpc_req_finished(request);
177 sb->s_blocksize = osfs.os_bsize;
178 sb->s_blocksize_bits = log2(osfs.os_bsize);
179 sb->s_magic = LL_SUPER_MAGIC;
180 sb->s_maxbytes = (1ULL << (32 + 9)) - osfs.os_bsize;
182 sb->s_op = &ll_super_operations;
184 /* make root inode */
186 err = mdc_getattr(&sbi->ll_mdc_conn, sbi->ll_rootino, S_IFDIR,
187 OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS, 0, &request);
189 CERROR("mdc_getattr failed for root: rc = %d\n", err);
190 GOTO(out_request, sb = NULL);
193 /* initialize committed transaction callback daemon */
194 spin_lock_init(&sbi->ll_commitcbd_lock);
195 init_waitqueue_head(&sbi->ll_commitcbd_waitq);
196 init_waitqueue_head(&sbi->ll_commitcbd_ctl_waitq);
197 sbi->ll_commitcbd_flags = 0;
198 err = ll_commitcbd_setup(sbi);
200 CERROR("failed to start commit callback daemon: rc = %d\n",err);
201 GOTO(out_request, sb = NULL);
204 md.body = lustre_msg_buf(request->rq_repmsg, 0);
206 root = iget4(sb, sbi->ll_rootino, NULL, &md);
209 sb->s_root = d_alloc_root(root);
211 CERROR("lustre_lite: bad iget4 for root\n");
212 GOTO(out_cdb, sb = NULL);
215 ptlrpc_req_finished(request);
219 OBD_FREE(mdc, strlen(mdc) + 1);
221 OBD_FREE(osc, strlen(osc) + 1);
226 ll_commitcbd_cleanup(sbi);
228 ptlrpc_req_finished(request);
229 obd_disconnect(&sbi->ll_osc_conn);
231 obd_disconnect(&sbi->ll_mdc_conn);
233 OBD_FREE(sbi, sizeof(*sbi));
237 } /* ll_read_super */
239 static void ll_put_super(struct super_block *sb)
241 struct ll_sb_info *sbi = ll_s2sbi(sb);
243 ll_commitcbd_cleanup(sbi);
244 obd_disconnect(&sbi->ll_osc_conn);
245 obd_disconnect(&sbi->ll_mdc_conn);
246 OBD_FREE(sbi, sizeof(*sbi));
252 static void ll_clear_inode(struct inode *inode)
254 if (atomic_read(&inode->i_count) == 0) {
255 struct ll_inode_info *lli = ll_i2info(inode);
256 struct lov_stripe_md *md = lli->lli_smd;
257 char *symlink_name = lli->lli_symlink_name;
260 int size = sizeof(*md) +
261 md->lmd_stripe_count * sizeof(struct lov_oinfo);
266 OBD_FREE(symlink_name, strlen(symlink_name) + 1);
267 lli->lli_symlink_name = NULL;
272 static void ll_delete_inode(struct inode *inode)
274 if (S_ISREG(inode->i_mode)) {
277 struct lov_stripe_md *md = ll_i2info(inode)->lli_smd;
282 if (md->lmd_object_id == 0) {
283 CERROR("This really happens\n");
284 /* No obdo was ever created */
292 oa->o_id = md->lmd_object_id;
293 oa->o_easize = md->lmd_easize;
294 oa->o_mode = inode->i_mode;
295 oa->o_valid = OBD_MD_FLID | OBD_MD_FLEASIZE | OBD_MD_FLMODE;
297 err = obd_destroy(ll_i2obdconn(inode), oa, md);
299 CDEBUG(D_SUPER, "obd destroy of "LPD64" error %d\n",
300 md->lmd_object_id, err);
306 /* like inode_setattr, but doesn't mark the inode dirty */
307 static int ll_attr2inode(struct inode * inode, struct iattr * attr, int trunc)
309 unsigned int ia_valid = attr->ia_valid;
312 if ((ia_valid & ATTR_SIZE) && trunc) {
313 error = vmtruncate(inode, attr->ia_size);
316 } else if (ia_valid & ATTR_SIZE)
317 inode->i_size = attr->ia_size;
319 if (ia_valid & ATTR_UID)
320 inode->i_uid = attr->ia_uid;
321 if (ia_valid & ATTR_GID)
322 inode->i_gid = attr->ia_gid;
323 if (ia_valid & ATTR_ATIME)
324 inode->i_atime = attr->ia_atime;
325 if (ia_valid & ATTR_MTIME)
326 inode->i_mtime = attr->ia_mtime;
327 if (ia_valid & ATTR_CTIME)
328 inode->i_ctime = attr->ia_ctime;
329 if (ia_valid & ATTR_MODE) {
330 inode->i_mode = attr->ia_mode;
331 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
332 inode->i_mode &= ~S_ISGID;
338 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
340 struct ptlrpc_request *request = NULL;
341 struct ll_sb_info *sbi = ll_i2sbi(inode);
346 /* change incore inode */
347 ll_attr2inode(inode, attr, do_trunc);
349 err = mdc_setattr(&sbi->ll_mdc_conn, inode, attr, &request);
351 CERROR("mdc_setattr fails (%d)\n", err);
353 ptlrpc_req_finished(request);
358 int ll_setattr(struct dentry *de, struct iattr *attr)
360 int rc = inode_change_ok(de->d_inode, attr);
365 return ll_inode_setattr(de->d_inode, attr, 1);
368 static int ll_statfs(struct super_block *sb, struct statfs *sfs)
370 struct ptlrpc_request *request = NULL;
371 struct ll_sb_info *sbi = ll_s2sbi(sb);
372 struct obd_statfs osfs;
376 memset(sfs, 0, sizeof(*sfs));
377 rc = mdc_statfs(&sbi->ll_mdc_conn, &osfs, &request);
378 statfs_unpack(sfs, &osfs);
379 ptlrpc_req_finished(request);
381 CERROR("mdc_statfs fails: rc = %d\n", rc);
383 CDEBUG(D_SUPER, "mdc_statfs shows blocks "LPU64"/"LPU64
384 " objects "LPU64"/"LPU64"\n",
385 osfs.os_bavail, osfs.os_blocks,
386 osfs.os_ffree, osfs.os_files);
388 /* temporary until mds_statfs returns statfs info for all OSTs */
390 struct statfs obd_sfs;
392 rc = obd_statfs(&sbi->ll_osc_conn, &osfs);
393 statfs_unpack(&obd_sfs, &osfs);
395 CERROR("obd_statfs fails: rc = %d\n", rc);
398 CDEBUG(D_SUPER, "obd_statfs shows blocks "LPU64"/"LPU64
399 " objects "LPU64"/"LPU64"\n",
400 osfs.os_bavail, osfs.os_blocks,
401 osfs.os_ffree, osfs.os_files);
403 sfs->f_bfree = obd_sfs.f_bfree;
404 sfs->f_bavail = obd_sfs.f_bavail;
405 sfs->f_blocks = obd_sfs.f_blocks;
406 if (obd_sfs.f_ffree < sfs->f_ffree)
407 sfs->f_ffree = obd_sfs.f_ffree;
414 inline int ll_stripe_mds_md_size(struct super_block *sb)
416 struct client_obd *mdc = sbi2mdc(ll_s2sbi(sb));
417 return mdc->cl_max_mdsize;
420 static void ll_read_inode2(struct inode *inode, void *opaque)
422 struct ll_inode_md *md = opaque;
423 struct mds_body *body = md->body;
424 struct ll_inode_info *lli = ll_i2info(inode);
427 sema_init(&lli->lli_open_sem, 1);
429 /* core attributes first */
430 if (body->valid & OBD_MD_FLID)
431 inode->i_ino = body->ino;
432 if (body->valid & OBD_MD_FLATIME)
433 inode->i_atime = body->atime;
434 if (body->valid & OBD_MD_FLMTIME)
435 inode->i_mtime = body->mtime;
436 if (body->valid & OBD_MD_FLCTIME)
437 inode->i_ctime = body->ctime;
438 if (body->valid & OBD_MD_FLMODE)
439 inode->i_mode = body->mode;
440 if (body->valid & OBD_MD_FLUID)
441 inode->i_uid = body->uid;
442 if (body->valid & OBD_MD_FLGID)
443 inode->i_gid = body->gid;
444 if (body->valid & OBD_MD_FLFLAGS)
445 inode->i_flags = body->flags;
446 if (body->valid & OBD_MD_FLNLINK)
447 inode->i_nlink = body->nlink;
448 if (body->valid & OBD_MD_FLGENER)
449 inode->i_generation = body->generation;
450 if (body->valid & OBD_MD_FLRDEV)
451 inode->i_rdev = body->extra;
452 if (body->valid & OBD_MD_FLSIZE)
453 inode->i_size = body->size;
456 //if (body->valid & OBD_MD_FLEASIZE)
457 if (md && md->md && md->md->lmd_stripe_count) {
458 struct lov_mds_md *smd = md->md;
460 if (md->md->lmd_easize != ll_stripe_mds_md_size(inode->i_sb)) {
461 CERROR("Striping metadata size error %ld\n",
465 size = sizeof(*lli->lli_smd) +
466 md->md->lmd_stripe_count * sizeof(struct lov_oinfo);
467 OBD_ALLOC(lli->lli_smd, size);
469 CERROR("No memory for %d\n", size);
472 lov_unpackmd(lli->lli_smd, smd);
477 /* Get the authoritative file size */
478 if (lli->lli_smd && (inode->i_mode & S_IFREG)) {
481 rc = ll_file_size(inode, lli->lli_smd);
483 CERROR("ll_file_size: %d\n", rc);
484 /* FIXME: need to somehow prevent inode creation */
489 /* OIDEBUG(inode); */
491 if (S_ISREG(inode->i_mode)) {
492 inode->i_op = &ll_file_inode_operations;
493 inode->i_fop = &ll_file_operations;
494 inode->i_mapping->a_ops = &ll_aops;
496 } else if (S_ISDIR(inode->i_mode)) {
497 inode->i_op = &ll_dir_inode_operations;
498 inode->i_fop = &ll_dir_operations;
499 inode->i_mapping->a_ops = &ll_dir_aops;
501 } else if (S_ISLNK(inode->i_mode)) {
502 inode->i_op = &ll_fast_symlink_inode_operations;
505 init_special_inode(inode, inode->i_mode, inode->i_rdev);
512 /* exported operations */
513 struct super_operations ll_super_operations =
515 read_inode2: ll_read_inode2,
516 clear_inode: ll_clear_inode,
517 delete_inode: ll_delete_inode,
518 put_super: ll_put_super,
522 struct file_system_type lustre_lite_fs_type = {
523 "lustre_lite", 0, ll_read_super, NULL
526 static int __init init_lustre_lite(void)
528 printk(KERN_INFO "Lustre Lite 0.0.1, info@clusterfs.com\n");
529 ll_file_data_slab = kmem_cache_create("ll_file_data",
530 sizeof(struct ll_file_data), 0,
531 SLAB_HWCACHE_ALIGN, NULL, NULL);
532 if (ll_file_data_slab == NULL)
534 return register_filesystem(&lustre_lite_fs_type);
537 static void __exit exit_lustre_lite(void)
539 unregister_filesystem(&lustre_lite_fs_type);
540 kmem_cache_destroy(ll_file_data_slab);
543 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
544 MODULE_DESCRIPTION("Lustre Lite Client File System v1.0");
545 MODULE_LICENSE("GPL");
547 module_init(init_lustre_lite);
548 module_exit(exit_lustre_lite);