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 void ll_options(char *options, char **ost, char **mds)
65 for (this_char = strtok (options, ",");
67 this_char = strtok (NULL, ",")) {
68 CDEBUG(D_SUPER, "this_char %s\n", this_char);
69 if ( (!*ost && (*ost = ll_read_opt("osc", this_char)))||
70 (!*mds && (*mds = ll_read_opt("mdc", this_char))) )
77 #define log2(n) ffz(~(n))
80 static struct super_block * ll_read_super(struct super_block *sb,
81 void *data, int silent)
83 struct inode *root = 0;
84 struct obd_device *obd;
85 struct ll_sb_info *sbi;
89 struct ll_fid rootfid;
90 struct obd_statfs osfs;
93 struct ptlrpc_request *request = NULL;
94 struct ll_inode_md md;
100 OBD_ALLOC(sbi, sizeof(*sbi));
106 generate_random_uuid(uuid);
107 class_uuid_unparse(uuid, sbi->ll_sb_uuid);
109 sb->u.generic_sbp = sbi;
111 ll_options(data, &osc, &mdc);
115 GOTO(out_free, sb = NULL);
120 GOTO(out_free, sb = NULL);
123 obd = class_uuid2obd(mdc);
125 CERROR("MDC %s: not setup or attached\n", mdc);
126 GOTO(out_free, sb = NULL);
129 err = obd_connect(&sbi->ll_mdc_conn, obd, sbi->ll_sb_uuid);
131 CERROR("cannot connect to %s: rc = %d\n", mdc, err);
132 GOTO(out_free, sb = NULL);
135 #warning Peter: is this the right place to raise the connection level?
136 sbi2mdc(sbi)->cl_import.imp_connection->c_level = LUSTRE_CONN_FULL;
138 obd = class_uuid2obd(osc);
140 CERROR("OSC %s: not setup or attached\n", osc);
141 GOTO(out_mdc, sb = NULL);
143 err = obd_connect(&sbi->ll_osc_conn, obd, sbi->ll_sb_uuid);
145 CERROR("cannot connect to %s: rc = %d\n", osc, err);
146 GOTO(out_mdc, sb = NULL);
149 /* XXX: need to store the last_* values somewhere */
150 err = mdc_getstatus(&sbi->ll_mdc_conn, &rootfid, &last_committed,
151 &last_xid, &request);
152 ptlrpc_req_finished(request);
154 CERROR("cannot mds_connect: rc = %d\n", err);
155 GOTO(out_mdc, sb = NULL);
157 CDEBUG(D_SUPER, "rootfid %Ld\n", (unsigned long long)rootfid.id);
158 sbi->ll_rootino = rootfid.id;
160 memset(&osfs, 0, sizeof(osfs));
162 err = mdc_statfs(&sbi->ll_mdc_conn, &osfs, &request);
163 ptlrpc_req_finished(request);
164 sb->s_blocksize = osfs.os_bsize;
165 sb->s_blocksize_bits = log2(osfs.os_bsize);
166 sb->s_magic = LL_SUPER_MAGIC;
167 sb->s_maxbytes = (1ULL << (32 + 9)) - osfs.os_bsize;
169 sb->s_op = &ll_super_operations;
171 /* make root inode */
173 err = mdc_getattr(&sbi->ll_mdc_conn, sbi->ll_rootino, S_IFDIR,
174 OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS, 0, &request);
176 CERROR("mdc_getattr failed for root: rc = %d\n", err);
177 GOTO(out_request, sb = NULL);
180 /* initialize committed transaction callback daemon */
181 spin_lock_init(&sbi->ll_commitcbd_lock);
182 init_waitqueue_head(&sbi->ll_commitcbd_waitq);
183 init_waitqueue_head(&sbi->ll_commitcbd_ctl_waitq);
184 sbi->ll_commitcbd_flags = 0;
185 err = ll_commitcbd_setup(sbi);
187 CERROR("failed to start commit callback daemon: rc = %d\n",err);
188 GOTO(out_request, sb = NULL);
191 md.body = lustre_msg_buf(request->rq_repmsg, 0);
193 root = iget4(sb, sbi->ll_rootino, NULL, &md);
196 sb->s_root = d_alloc_root(root);
198 CERROR("lustre_lite: bad iget4 for root\n");
199 GOTO(out_cdb, sb = NULL);
202 ptlrpc_req_finished(request);
206 OBD_FREE(mdc, strlen(mdc) + 1);
208 OBD_FREE(osc, strlen(osc) + 1);
213 ll_commitcbd_cleanup(sbi);
215 ptlrpc_req_finished(request);
216 obd_disconnect(&sbi->ll_osc_conn);
218 obd_disconnect(&sbi->ll_mdc_conn);
220 OBD_FREE(sbi, sizeof(*sbi));
224 } /* ll_read_super */
226 static void ll_put_super(struct super_block *sb)
228 struct ll_sb_info *sbi = ll_s2sbi(sb);
230 ll_commitcbd_cleanup(sbi);
231 obd_disconnect(&sbi->ll_osc_conn);
232 obd_disconnect(&sbi->ll_mdc_conn);
233 OBD_FREE(sbi, sizeof(*sbi));
239 static void ll_clear_inode(struct inode *inode)
241 if (atomic_read(&inode->i_count) == 0) {
242 struct ll_inode_info *lli = ll_i2info(inode);
243 struct lov_stripe_md *md = lli->lli_smd;
244 char *symlink_name = lli->lli_symlink_name;
247 int size = sizeof(*md) +
248 md->lmd_stripe_count * sizeof(struct lov_oinfo);
253 OBD_FREE(symlink_name, strlen(symlink_name) + 1);
254 lli->lli_symlink_name = NULL;
259 static void ll_delete_inode(struct inode *inode)
261 if (S_ISREG(inode->i_mode)) {
264 struct lov_stripe_md *md = ll_i2info(inode)->lli_smd;
269 if (md->lmd_object_id == 0) {
270 CERROR("This really happens\n");
271 /* No obdo was ever created */
279 oa->o_id = md->lmd_object_id;
280 oa->o_easize = md->lmd_easize;
281 oa->o_mode = inode->i_mode;
282 oa->o_valid = OBD_MD_FLID | OBD_MD_FLEASIZE | OBD_MD_FLMODE;
284 err = obd_destroy(ll_i2obdconn(inode), oa, md);
286 CDEBUG(D_SUPER, "obd destroy of %Ld error %d\n",
287 md->lmd_object_id, err);
293 /* like inode_setattr, but doesn't mark the inode dirty */
294 static int ll_attr2inode(struct inode * inode, struct iattr * attr, int trunc)
296 unsigned int ia_valid = attr->ia_valid;
299 if ((ia_valid & ATTR_SIZE) && trunc) {
300 error = vmtruncate(inode, attr->ia_size);
303 } else if (ia_valid & ATTR_SIZE)
304 inode->i_size = attr->ia_size;
306 if (ia_valid & ATTR_UID)
307 inode->i_uid = attr->ia_uid;
308 if (ia_valid & ATTR_GID)
309 inode->i_gid = attr->ia_gid;
310 if (ia_valid & ATTR_ATIME)
311 inode->i_atime = attr->ia_atime;
312 if (ia_valid & ATTR_MTIME)
313 inode->i_mtime = attr->ia_mtime;
314 if (ia_valid & ATTR_CTIME)
315 inode->i_ctime = attr->ia_ctime;
316 if (ia_valid & ATTR_MODE) {
317 inode->i_mode = attr->ia_mode;
318 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
319 inode->i_mode &= ~S_ISGID;
325 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
327 struct ptlrpc_request *request = NULL;
328 struct ll_sb_info *sbi = ll_i2sbi(inode);
333 /* change incore inode */
334 ll_attr2inode(inode, attr, do_trunc);
336 err = mdc_setattr(&sbi->ll_mdc_conn, inode, attr, &request);
338 CERROR("mdc_setattr fails (%d)\n", err);
340 ptlrpc_req_finished(request);
345 int ll_setattr(struct dentry *de, struct iattr *attr)
347 int rc = inode_change_ok(de->d_inode, attr);
352 return ll_inode_setattr(de->d_inode, attr, 1);
355 static int ll_statfs(struct super_block *sb, struct statfs *sfs)
357 struct ptlrpc_request *request = NULL;
358 struct ll_sb_info *sbi = ll_s2sbi(sb);
359 struct obd_statfs osfs;
363 memset(sfs, 0, sizeof(*sfs));
364 rc = mdc_statfs(&sbi->ll_mdc_conn, &osfs, &request);
365 statfs_unpack(sfs, &osfs);
366 ptlrpc_req_finished(request);
368 CERROR("mdc_statfs fails: rc = %d\n", rc);
370 CDEBUG(D_SUPER, "mdc_statfs shows blocks "LPU64"/"LPU64
371 " objects "LPU64"/"LPU64"\n",
372 osfs.os_bavail, osfs.os_blocks,
373 osfs.os_ffree, osfs.os_files);
375 /* temporary until mds_statfs returns statfs info for all OSTs */
377 struct statfs obd_sfs;
379 rc = obd_statfs(&sbi->ll_osc_conn, &osfs);
380 statfs_unpack(&obd_sfs, &osfs);
382 CERROR("obd_statfs fails: rc = %d\n", rc);
385 CDEBUG(D_SUPER, "obd_statfs shows blocks "LPU64"/"LPU64
386 " objects "LPU64"/"LPU64"\n",
387 osfs.os_bavail, osfs.os_blocks,
388 osfs.os_ffree, osfs.os_files);
390 sfs->f_bfree = obd_sfs.f_bfree;
391 sfs->f_bavail = obd_sfs.f_bavail;
392 sfs->f_blocks = obd_sfs.f_blocks;
393 if (obd_sfs.f_ffree < sfs->f_ffree)
394 sfs->f_ffree = obd_sfs.f_ffree;
401 inline int ll_stripe_mds_md_size(struct super_block *sb)
403 struct client_obd *mdc = sbi2mdc(ll_s2sbi(sb));
404 return mdc->cl_max_mdsize;
407 static void ll_read_inode2(struct inode *inode, void *opaque)
409 struct ll_inode_md *md = opaque;
410 struct mds_body *body = md->body;
411 struct ll_inode_info *lli = ll_i2info(inode);
414 sema_init(&lli->lli_open_sem, 1);
416 /* core attributes first */
417 if (body->valid & OBD_MD_FLID)
418 inode->i_ino = body->ino;
419 if (body->valid & OBD_MD_FLATIME)
420 inode->i_atime = body->atime;
421 if (body->valid & OBD_MD_FLMTIME)
422 inode->i_mtime = body->mtime;
423 if (body->valid & OBD_MD_FLCTIME)
424 inode->i_ctime = body->ctime;
425 if (body->valid & OBD_MD_FLMODE)
426 inode->i_mode = body->mode;
427 if (body->valid & OBD_MD_FLUID)
428 inode->i_uid = body->uid;
429 if (body->valid & OBD_MD_FLGID)
430 inode->i_gid = body->gid;
431 if (body->valid & OBD_MD_FLFLAGS)
432 inode->i_flags = body->flags;
433 if (body->valid & OBD_MD_FLNLINK)
434 inode->i_nlink = body->nlink;
435 if (body->valid & OBD_MD_FLGENER)
436 inode->i_generation = body->generation;
437 if (body->valid & OBD_MD_FLRDEV)
438 inode->i_rdev = body->extra;
439 if (body->valid & OBD_MD_FLSIZE)
440 inode->i_size = body->size;
443 //if (body->valid & OBD_MD_FLEASIZE)
444 if (md && md->md && md->md->lmd_stripe_count) {
445 struct lov_mds_md *smd = md->md;
447 if (md->md->lmd_easize != ll_stripe_mds_md_size(inode->i_sb)) {
448 CERROR("Striping metadata size error %ld\n",
452 size = sizeof(*lli->lli_smd) +
453 md->md->lmd_stripe_count * sizeof(struct lov_oinfo);
454 OBD_ALLOC(lli->lli_smd, size);
456 CERROR("No memory for %d\n", size);
459 lov_unpackmd(lli->lli_smd, smd);
464 /* Get the authoritative file size */
465 if (lli->lli_smd && (inode->i_mode & S_IFREG)) {
468 rc = ll_file_size(inode, lli->lli_smd);
470 CERROR("ll_file_size: %d\n", rc);
471 /* FIXME: need to somehow prevent inode creation */
476 /* OIDEBUG(inode); */
478 if (S_ISREG(inode->i_mode)) {
479 inode->i_op = &ll_file_inode_operations;
480 inode->i_fop = &ll_file_operations;
481 inode->i_mapping->a_ops = &ll_aops;
483 } else if (S_ISDIR(inode->i_mode)) {
484 inode->i_op = &ll_dir_inode_operations;
485 inode->i_fop = &ll_dir_operations;
486 inode->i_mapping->a_ops = &ll_dir_aops;
488 } else if (S_ISLNK(inode->i_mode)) {
489 inode->i_op = &ll_fast_symlink_inode_operations;
492 init_special_inode(inode, inode->i_mode, inode->i_rdev);
499 /* exported operations */
500 struct super_operations ll_super_operations =
502 read_inode2: ll_read_inode2,
503 clear_inode: ll_clear_inode,
504 delete_inode: ll_delete_inode,
505 put_super: ll_put_super,
509 struct file_system_type lustre_lite_fs_type = {
510 "lustre_lite", 0, ll_read_super, NULL
513 static int __init init_lustre_lite(void)
515 printk(KERN_INFO "Lustre Lite 0.0.1, info@clusterfs.com\n");
516 ll_file_data_slab = kmem_cache_create("ll_file_data",
517 sizeof(struct ll_file_data), 0,
518 SLAB_HWCACHE_ALIGN, NULL, NULL);
519 if (ll_file_data_slab == NULL)
521 return register_filesystem(&lustre_lite_fs_type);
524 static void __exit exit_lustre_lite(void)
526 unregister_filesystem(&lustre_lite_fs_type);
527 kmem_cache_destroy(ll_file_data_slab);
530 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
531 MODULE_DESCRIPTION("Lustre Lite Client File System v1.0");
532 MODULE_LICENSE("GPL");
534 module_init(init_lustre_lite);
535 module_exit(exit_lustre_lite);