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/lustre_lite.h>
16 #include <linux/lustre_ha.h>
17 #include <linux/lustre_dlm.h>
18 #include <linux/init.h>
20 kmem_cache_t *ll_file_data_slab;
21 extern struct address_space_operations ll_aops;
22 extern struct address_space_operations ll_dir_aops;
23 struct super_operations ll_super_operations;
25 extern int ll_recover(struct ptlrpc_client *);
26 extern int ll_commitcbd_setup(struct ll_sb_info *);
27 extern int ll_commitcbd_cleanup(struct ll_sb_info *);
29 static char *ll_read_opt(const char *opt, char *data)
35 CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
36 if ( strncmp(opt, data, strlen(opt)) )
38 if ( (value = strchr(data, '=')) == NULL )
42 OBD_ALLOC(retval, strlen(value) + 1);
44 CERROR("out of memory!\n");
48 memcpy(retval, value, strlen(value)+1);
49 CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
53 static void ll_options(char *options, char **ost, char **mds)
63 for (this_char = strtok (options, ",");
65 this_char = strtok (NULL, ",")) {
66 CDEBUG(D_SUPER, "this_char %s\n", this_char);
67 if ( (!*ost && (*ost = ll_read_opt("osc", this_char)))||
68 (!*mds && (*mds = ll_read_opt("mdc", this_char))) )
75 #define log2(n) ffz(~(n))
78 static struct super_block * ll_read_super(struct super_block *sb,
79 void *data, int silent)
81 struct inode *root = 0;
82 struct obd_device *obd;
83 struct ll_sb_info *sbi;
87 struct ll_fid rootfid;
89 __u64 last_committed, last_rcvd;
91 struct ptlrpc_request *request = NULL;
92 struct ll_inode_md md;
97 OBD_ALLOC(sbi, sizeof(*sbi));
103 sb->u.generic_sbp = sbi;
105 ll_options(data, &osc, &mdc);
109 GOTO(out_free, sb = NULL);
114 GOTO(out_free, sb = NULL);
117 obd = class_uuid2obd(mdc);
119 CERROR("MDC %s: not setup or attached\n", mdc);
120 GOTO(out_free, sb = NULL);
124 err = connmgr_connect(ptlrpc_connmgr, sbi->ll_mdc_conn);
126 CERROR("cannot connect to MDC: rc = %d\n", err);
127 GOTO(out_rpc, sb = NULL);
131 err = obd_connect(&sbi->ll_mdc_conn, obd);
133 CERROR("cannot connect to %s: rc = %d\n", mdc, err);
134 GOTO(out_free, sb = NULL);
136 sbi2mdc(sbi)->cl_conn->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);
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_rcvd, &last_xid, &request);
153 CERROR("cannot mdc_connect: rc = %d\n", err);
154 GOTO(out_request, sb = NULL);
156 CDEBUG(D_SUPER, "rootfid %Ld\n", (unsigned long long)rootfid.id);
157 sbi->ll_rootino = rootfid.id;
159 memset(&sfs, 0, sizeof(sfs));
160 err = mdc_statfs(&sbi->ll_mdc_conn, &sfs, &request);
161 sb->s_blocksize = sfs.f_bsize;
162 sb->s_blocksize_bits = log2(sfs.f_bsize);
163 sb->s_magic = LL_SUPER_MAGIC;
164 sb->s_maxbytes = (1ULL << (32 + 9)) - sfs.f_bsize;
165 ptlrpc_req_finished(request);
167 sb->s_op = &ll_super_operations;
169 /* make root inode */
170 err = mdc_getattr(&sbi->ll_mdc_conn, sbi->ll_rootino, S_IFDIR,
171 OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS, 0, &request);
173 CERROR("mdc_getattr failed for root: rc = %d\n", err);
174 GOTO(out_request, sb = NULL);
177 /* initialize committed transaction callback daemon */
178 spin_lock_init(&sbi->ll_commitcbd_lock);
179 init_waitqueue_head(&sbi->ll_commitcbd_waitq);
180 init_waitqueue_head(&sbi->ll_commitcbd_ctl_waitq);
181 sbi->ll_commitcbd_flags = 0;
182 err = ll_commitcbd_setup(sbi);
184 CERROR("failed to start commit callback daemon: rc = %d\n",err);
185 GOTO(out_request, sb = NULL);
188 md.body = lustre_msg_buf(request->rq_repmsg, 0);
190 root = iget4(sb, sbi->ll_rootino, NULL, &md);
193 sb->s_root = d_alloc_root(root);
195 CERROR("lustre_lite: bad iget4 for root\n");
196 GOTO(out_cdb, sb = NULL);
199 ptlrpc_free_req(request);
203 OBD_FREE(mdc, strlen(mdc) + 1);
205 OBD_FREE(osc, strlen(osc) + 1);
210 ll_commitcbd_cleanup(sbi);
212 ptlrpc_free_req(request);
213 obd_disconnect(&sbi->ll_osc_conn);
215 obd_disconnect(&sbi->ll_mdc_conn);
217 OBD_FREE(sbi, sizeof(*sbi));
221 } /* ll_read_super */
223 static void ll_put_super(struct super_block *sb)
225 struct ll_sb_info *sbi = ll_s2sbi(sb);
227 ll_commitcbd_cleanup(sbi);
228 obd_disconnect(&sbi->ll_osc_conn);
229 obd_disconnect(&sbi->ll_mdc_conn);
230 OBD_FREE(sbi, sizeof(*sbi));
236 static void ll_clear_inode(struct inode *inode)
238 if (atomic_read(&inode->i_count) == 0) {
239 struct ll_inode_info *lli = ll_i2info(inode);
240 struct lov_stripe_md *md = lli->lli_smd;
243 OBD_FREE(md, md->lmd_easize);
246 if (lli->lli_symlink_name) {
247 OBD_FREE(lli->lli_symlink_name,
248 strlen(lli->lli_symlink_name) + 1);
249 lli->lli_symlink_name = NULL;
254 static void ll_delete_inode(struct inode *inode)
256 if (S_ISREG(inode->i_mode)) {
259 struct lov_stripe_md *md = ll_i2info(inode)->lli_smd;
264 oa.o_id = md->lmd_object_id;
265 oa.o_easize = md->lmd_easize;
267 CERROR("This really happens\n");
268 /* No obdo was ever created */
272 err = obd_destroy(ll_i2obdconn(inode), &oa, md);
273 CDEBUG(D_SUPER, "obd destroy of %Ld error %d\n",
274 md->lmd_object_id, err);
280 /* like inode_setattr, but doesn't mark the inode dirty */
281 static int ll_attr2inode(struct inode * inode, struct iattr * attr, int trunc)
283 unsigned int ia_valid = attr->ia_valid;
286 if ((ia_valid & ATTR_SIZE) && trunc) {
287 error = vmtruncate(inode, attr->ia_size);
290 } else if (ia_valid & ATTR_SIZE)
291 inode->i_size = attr->ia_size;
293 if (ia_valid & ATTR_UID)
294 inode->i_uid = attr->ia_uid;
295 if (ia_valid & ATTR_GID)
296 inode->i_gid = attr->ia_gid;
297 if (ia_valid & ATTR_ATIME)
298 inode->i_atime = attr->ia_atime;
299 if (ia_valid & ATTR_MTIME)
300 inode->i_mtime = attr->ia_mtime;
301 if (ia_valid & ATTR_CTIME)
302 inode->i_ctime = attr->ia_ctime;
303 if (ia_valid & ATTR_MODE) {
304 inode->i_mode = attr->ia_mode;
305 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
306 inode->i_mode &= ~S_ISGID;
312 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
314 struct ptlrpc_request *request = NULL;
315 struct ll_sb_info *sbi = ll_i2sbi(inode);
320 /* change incore inode */
321 ll_attr2inode(inode, attr, do_trunc);
323 err = mdc_setattr(&sbi->ll_mdc_conn, inode, attr, &request);
325 CERROR("mdc_setattr fails (%d)\n", err);
327 ptlrpc_req_finished(request);
332 int ll_setattr(struct dentry *de, struct iattr *attr)
334 int rc = inode_change_ok(de->d_inode, attr);
339 return ll_inode_setattr(de->d_inode, attr, 1);
342 static int ll_statfs(struct super_block *sb, struct statfs *sfs)
344 struct ptlrpc_request *request = NULL;
345 struct ll_sb_info *sbi = ll_s2sbi(sb);
349 memset(sfs, 0, sizeof(*sfs));
350 rc = mdc_statfs(&sbi->ll_mdc_conn, sfs, &request);
351 ptlrpc_req_finished(request);
353 CERROR("obd_statfs fails: rc = %d\n", rc);
355 CDEBUG(D_SUPER, "statfs shows blocks %ld/%ld objects %ld/%ld\n",
356 sfs->f_bavail, sfs->f_blocks, sfs->f_files,sfs->f_ffree);
358 /* temporary until mds_statfs returns statfs info for all OSTs */
360 struct statfs obd_sfs;
362 rc = obd_statfs(&sbi->ll_osc_conn, &obd_sfs);
364 CERROR("obd_statfs fails: rc = %d\n", rc);
367 CDEBUG(D_SUPER, "obd_statfs returns blocks %ld/%ld, "
369 obd_sfs.f_bavail, obd_sfs.f_blocks,
370 obd_sfs.f_ffree, obd_sfs.f_files);
372 sfs->f_bfree = obd_sfs.f_bfree;
373 sfs->f_bavail = obd_sfs.f_bavail;
374 sfs->f_blocks = obd_sfs.f_blocks;
375 if (obd_sfs.f_ffree < sfs->f_ffree)
376 sfs->f_ffree = obd_sfs.f_ffree;
383 inline int ll_stripe_md_size(struct super_block *sb)
385 struct client_obd *mdc = sbi2mdc(ll_s2sbi(sb));
386 return mdc->cl_max_mdsize;
389 static void ll_to_inode(struct inode *dst, struct ll_inode_md *md)
391 struct mds_body *body = md->body;
392 struct ll_inode_info *ii = ll_i2info(dst);
394 /* core attributes first */
395 if (body->valid & OBD_MD_FLID)
396 dst->i_ino = body->ino;
397 if (body->valid & OBD_MD_FLATIME)
398 dst->i_atime = body->atime;
399 if (body->valid & OBD_MD_FLMTIME)
400 dst->i_mtime = body->mtime;
401 if (body->valid & OBD_MD_FLCTIME)
402 dst->i_ctime = body->ctime;
403 if (body->valid & OBD_MD_FLSIZE)
404 dst->i_size = body->size;
405 if (body->valid & OBD_MD_FLMODE)
406 dst->i_mode = body->mode;
407 if (body->valid & OBD_MD_FLUID)
408 dst->i_uid = body->uid;
409 if (body->valid & OBD_MD_FLGID)
410 dst->i_gid = body->gid;
411 if (body->valid & OBD_MD_FLFLAGS)
412 dst->i_flags = body->flags;
413 if (body->valid & OBD_MD_FLNLINK)
414 dst->i_nlink = body->nlink;
415 if (body->valid & OBD_MD_FLGENER)
416 dst->i_generation = body->generation;
417 if (body->valid & OBD_MD_FLRDEV)
418 dst->i_rdev = body->extra;
419 if (md && md->md && md->md->lmd_stripe_count) {
420 struct lov_stripe_md *smd = md->md;
421 int size = ll_stripe_md_size(dst->i_sb);
422 if (md->md->lmd_easize != size) {
423 CERROR("Striping metadata size error %ld\n",
427 OBD_ALLOC(ii->lli_smd, size);
429 CERROR("No memory for %d\n", size);
432 memcpy(ii->lli_smd, smd, size);
436 static void ll_read_inode2(struct inode *inode, void *opaque)
438 struct ll_inode_md *md = opaque;
441 ll_to_inode(inode, md);
443 /* OIDEBUG(inode); */
445 if (S_ISREG(inode->i_mode)) {
446 inode->i_op = &ll_file_inode_operations;
447 inode->i_fop = &ll_file_operations;
448 inode->i_mapping->a_ops = &ll_aops;
450 } else if (S_ISDIR(inode->i_mode)) {
451 inode->i_op = &ll_dir_inode_operations;
452 inode->i_fop = &ll_dir_operations;
453 inode->i_mapping->a_ops = &ll_dir_aops;
455 } else if (S_ISLNK(inode->i_mode)) {
456 inode->i_op = &ll_fast_symlink_inode_operations;
459 init_special_inode(inode, inode->i_mode,
460 ((int *)ll_i2info(inode)->lli_inline)[0]);
467 /* exported operations */
468 struct super_operations ll_super_operations =
470 read_inode2: ll_read_inode2,
471 clear_inode: ll_clear_inode,
472 delete_inode: ll_delete_inode,
473 put_super: ll_put_super,
477 struct file_system_type lustre_lite_fs_type = {
478 "lustre_lite", 0, ll_read_super, NULL
481 static int __init init_lustre_lite(void)
483 printk(KERN_INFO "Lustre Lite 0.0.1, info@clusterfs.com\n");
484 ll_file_data_slab = kmem_cache_create("ll_file_data",
485 sizeof(struct ll_file_data), 0,
486 SLAB_HWCACHE_ALIGN, NULL, NULL);
487 if (ll_file_data_slab == NULL)
489 return register_filesystem(&lustre_lite_fs_type);
492 static void __exit exit_lustre_lite(void)
494 unregister_filesystem(&lustre_lite_fs_type);
495 kmem_cache_destroy(ll_file_data_slab);
498 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
499 MODULE_DESCRIPTION("Lustre Lite Client File System v1.0");
500 MODULE_LICENSE("GPL");
502 module_init(init_lustre_lite);
503 module_exit(exit_lustre_lite);