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_read_inode2_cookie lic;
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);
157 err = obd_connect(&sbi->ll_osc_conn, obd, sbi->ll_sb_uuid);
159 CERROR("cannot connect to %s: rc = %d\n", osc, err);
160 GOTO(out_mdc, sb = NULL);
163 /* XXX: need to store the last_* values somewhere */
164 err = mdc_getstatus(&sbi->ll_mdc_conn, &rootfid, &last_committed,
165 &last_xid, &request);
166 ptlrpc_req_finished(request);
168 CERROR("cannot mds_connect: rc = %d\n", err);
169 GOTO(out_mdc, sb = NULL);
171 CDEBUG(D_SUPER, "rootfid %Ld\n", (unsigned long long)rootfid.id);
172 sbi->ll_rootino = rootfid.id;
174 memset(&osfs, 0, sizeof(osfs));
176 err = mdc_statfs(&sbi->ll_mdc_conn, &osfs, &request);
177 ptlrpc_req_finished(request);
178 sb->s_blocksize = osfs.os_bsize;
179 sb->s_blocksize_bits = log2(osfs.os_bsize);
180 sb->s_magic = LL_SUPER_MAGIC;
181 sb->s_maxbytes = (1ULL << (32 + 9)) - osfs.os_bsize;
183 sb->s_op = &ll_super_operations;
185 /* make root inode */
187 err = mdc_getattr(&sbi->ll_mdc_conn, sbi->ll_rootino, S_IFDIR,
188 OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS, 0, &request);
190 CERROR("mdc_getattr failed for root: rc = %d\n", err);
191 GOTO(out_request, sb = NULL);
194 /* initialize committed transaction callback daemon */
195 spin_lock_init(&sbi->ll_commitcbd_lock);
196 init_waitqueue_head(&sbi->ll_commitcbd_waitq);
197 init_waitqueue_head(&sbi->ll_commitcbd_ctl_waitq);
198 sbi->ll_commitcbd_flags = 0;
199 err = ll_commitcbd_setup(sbi);
201 CERROR("failed to start commit callback daemon: rc = %d\n",err);
202 GOTO(out_request, sb = NULL);
205 lic.lic_body = lustre_msg_buf(request->rq_repmsg, 0);
207 root = iget4(sb, sbi->ll_rootino, NULL, &lic);
210 sb->s_root = d_alloc_root(root);
212 CERROR("lustre_lite: bad iget4 for root\n");
213 GOTO(out_cdb, sb = NULL);
216 ptlrpc_req_finished(request);
220 OBD_FREE(mdc, strlen(mdc) + 1);
222 OBD_FREE(osc, strlen(osc) + 1);
227 ll_commitcbd_cleanup(sbi);
229 ptlrpc_req_finished(request);
230 obd_disconnect(&sbi->ll_osc_conn);
232 obd_disconnect(&sbi->ll_mdc_conn);
234 OBD_FREE(sbi, sizeof(*sbi));
238 } /* ll_read_super */
240 static void ll_put_super(struct super_block *sb)
242 struct ll_sb_info *sbi = ll_s2sbi(sb);
244 ll_commitcbd_cleanup(sbi);
245 obd_disconnect(&sbi->ll_osc_conn);
246 obd_disconnect(&sbi->ll_mdc_conn);
247 OBD_FREE(sbi, sizeof(*sbi));
253 static void ll_clear_inode(struct inode *inode)
255 if (atomic_read(&inode->i_count) == 0) {
256 struct ll_inode_info *lli = ll_i2info(inode);
257 struct lov_stripe_md *lsm = lli->lli_smd;
258 char *symlink_name = lli->lli_symlink_name;
261 OBD_FREE(lsm, ll_ost_easize(inode->i_sb));
265 OBD_FREE(symlink_name, strlen(symlink_name) + 1);
266 lli->lli_symlink_name = NULL;
271 static void ll_delete_inode(struct inode *inode)
273 if (S_ISREG(inode->i_mode)) {
276 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
281 if (lsm->lsm_object_id == 0) {
282 CERROR("This really happens\n");
283 /* No obdo was ever created */
291 oa->o_id = lsm->lsm_object_id;
292 oa->o_easize = ll_mds_easize(inode->i_sb);
293 oa->o_mode = inode->i_mode;
294 oa->o_valid = OBD_MD_FLID | OBD_MD_FLEASIZE | OBD_MD_FLTYPE;
296 err = obd_destroy(ll_i2obdconn(inode), oa, lsm);
298 CDEBUG(D_SUPER, "obd destroy of objid "LPX64" error %d\n",
299 lsm->lsm_object_id, err);
305 /* like inode_setattr, but doesn't mark the inode dirty */
306 static int ll_attr2inode(struct inode * inode, struct iattr * attr, int trunc)
308 unsigned int ia_valid = attr->ia_valid;
311 if ((ia_valid & ATTR_SIZE) && trunc) {
312 error = vmtruncate(inode, attr->ia_size);
315 } else if (ia_valid & ATTR_SIZE)
316 inode->i_size = attr->ia_size;
318 if (ia_valid & ATTR_UID)
319 inode->i_uid = attr->ia_uid;
320 if (ia_valid & ATTR_GID)
321 inode->i_gid = attr->ia_gid;
322 if (ia_valid & ATTR_ATIME)
323 inode->i_atime = attr->ia_atime;
324 if (ia_valid & ATTR_MTIME)
325 inode->i_mtime = attr->ia_mtime;
326 if (ia_valid & ATTR_CTIME)
327 inode->i_ctime = attr->ia_ctime;
328 if (ia_valid & ATTR_MODE) {
329 inode->i_mode = attr->ia_mode;
330 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
331 inode->i_mode &= ~S_ISGID;
337 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
339 struct ptlrpc_request *request = NULL;
340 struct ll_sb_info *sbi = ll_i2sbi(inode);
345 /* change incore inode */
346 ll_attr2inode(inode, attr, do_trunc);
348 err = mdc_setattr(&sbi->ll_mdc_conn, inode, attr, &request);
350 CERROR("mdc_setattr fails (%d)\n", err);
352 ptlrpc_req_finished(request);
357 int ll_setattr(struct dentry *de, struct iattr *attr)
359 int rc = inode_change_ok(de->d_inode, attr);
364 return ll_inode_setattr(de->d_inode, attr, 1);
367 static int ll_statfs(struct super_block *sb, struct statfs *sfs)
369 struct ptlrpc_request *request = NULL;
370 struct ll_sb_info *sbi = ll_s2sbi(sb);
371 struct obd_statfs osfs;
375 memset(sfs, 0, sizeof(*sfs));
376 rc = mdc_statfs(&sbi->ll_mdc_conn, &osfs, &request);
377 statfs_unpack(sfs, &osfs);
378 ptlrpc_req_finished(request);
380 CERROR("mdc_statfs fails: rc = %d\n", rc);
382 CDEBUG(D_SUPER, "mdc_statfs shows blocks "LPU64"/"LPU64
383 " objects "LPU64"/"LPU64"\n",
384 osfs.os_bavail, osfs.os_blocks,
385 osfs.os_ffree, osfs.os_files);
387 /* temporary until mds_statfs returns statfs info for all OSTs */
389 rc = obd_statfs(&sbi->ll_osc_conn, &osfs);
391 CERROR("obd_statfs fails: rc = %d\n", rc);
394 CDEBUG(D_SUPER, "obd_statfs shows blocks "LPU64"/"LPU64
395 " objects "LPU64"/"LPU64"\n",
396 osfs.os_bavail, osfs.os_blocks,
397 osfs.os_ffree, osfs.os_files);
399 while (osfs.os_blocks > ~0UL) {
402 osfs.os_blocks >>= 1;
404 osfs.os_bavail >>= 1;
406 sfs->f_blocks = osfs.os_blocks;
407 sfs->f_bfree = osfs.os_bfree;
408 sfs->f_bavail = osfs.os_bavail;
409 if (osfs.os_ffree < (__u64)sfs->f_ffree)
410 sfs->f_ffree = osfs.os_ffree;
417 void ll_update_inode(struct inode *inode, struct mds_body *body)
419 if (body->valid & OBD_MD_FLID)
420 inode->i_ino = body->ino;
421 if (body->valid & OBD_MD_FLATIME)
422 inode->i_atime = body->atime;
423 if (body->valid & OBD_MD_FLMTIME)
424 inode->i_mtime = body->mtime;
425 if (body->valid & OBD_MD_FLCTIME)
426 inode->i_ctime = body->ctime;
427 if (body->valid & OBD_MD_FLMODE)
428 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
429 if (body->valid & OBD_MD_FLTYPE)
430 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
431 if (body->valid & OBD_MD_FLUID)
432 inode->i_uid = body->uid;
433 if (body->valid & OBD_MD_FLGID)
434 inode->i_gid = body->gid;
435 if (body->valid & OBD_MD_FLFLAGS)
436 inode->i_flags = body->flags;
437 if (body->valid & OBD_MD_FLNLINK)
438 inode->i_nlink = body->nlink;
439 if (body->valid & OBD_MD_FLGENER)
440 inode->i_generation = body->generation;
441 if (body->valid & OBD_MD_FLRDEV)
442 inode->i_rdev = body->extra;
443 if (body->valid & OBD_MD_FLSIZE)
444 inode->i_size = body->size;
447 static void ll_read_inode2(struct inode *inode, void *opaque)
449 struct ll_read_inode2_cookie *lic = opaque;
450 struct mds_body *body = lic->lic_body;
451 struct ll_inode_info *lli = ll_i2info(inode);
454 sema_init(&lli->lli_open_sem, 1);
456 /* core attributes first */
457 ll_update_inode(inode, body);
459 //if (body->valid & OBD_MD_FLEASIZE)
460 if (lic && lic->lic_lmm) {
461 struct lov_mds_md *lmm = lic->lic_lmm;
464 if (lmm->lmm_easize != ll_mds_easize(inode->i_sb)) {
465 CERROR("Striping metadata size error %ld\n",
469 size = ll_ost_easize(inode->i_sb);
470 OBD_ALLOC(lli->lli_smd, size);
472 CERROR("No memory for %d\n", size);
475 lov_unpackmd(lli->lli_smd, lmm);
480 /* Get the authoritative file size */
481 if (lli->lli_smd && (inode->i_mode & S_IFREG)) {
484 rc = ll_file_size(inode, lli->lli_smd);
486 CERROR("ll_file_size: %d\n", rc);
487 /* FIXME: need to somehow prevent inode creation */
492 /* OIDEBUG(inode); */
494 if (S_ISREG(inode->i_mode)) {
495 inode->i_op = &ll_file_inode_operations;
496 inode->i_fop = &ll_file_operations;
497 inode->i_mapping->a_ops = &ll_aops;
499 } else if (S_ISDIR(inode->i_mode)) {
500 inode->i_op = &ll_dir_inode_operations;
501 inode->i_fop = &ll_dir_operations;
502 inode->i_mapping->a_ops = &ll_dir_aops;
504 } else if (S_ISLNK(inode->i_mode)) {
505 inode->i_op = &ll_fast_symlink_inode_operations;
508 init_special_inode(inode, inode->i_mode, inode->i_rdev);
513 /* exported operations */
514 struct super_operations ll_super_operations =
516 read_inode2: ll_read_inode2,
517 clear_inode: ll_clear_inode,
518 delete_inode: ll_delete_inode,
519 put_super: ll_put_super,
523 struct file_system_type lustre_lite_fs_type = {
524 "lustre_lite", 0, ll_read_super, NULL
527 static int __init init_lustre_lite(void)
529 printk(KERN_INFO "Lustre Lite 0.0.1, info@clusterfs.com\n");
530 ll_file_data_slab = kmem_cache_create("ll_file_data",
531 sizeof(struct ll_file_data), 0,
532 SLAB_HWCACHE_ALIGN, NULL, NULL);
533 if (ll_file_data_slab == NULL)
535 return register_filesystem(&lustre_lite_fs_type);
538 static void __exit exit_lustre_lite(void)
540 unregister_filesystem(&lustre_lite_fs_type);
541 kmem_cache_destroy(ll_file_data_slab);
544 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
545 MODULE_DESCRIPTION("Lustre Lite Client File System v1.0");
546 MODULE_LICENSE("GPL");
548 module_init(init_lustre_lite);
549 module_exit(exit_lustre_lite);