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) 1996 Peter J. Braam <braam@stelias.com>
10 * Copryright (C) 1999 Stelias Computing Inc. <braam@stelias.com>
11 * Copryright (C) 1999 Seagate Technology Inc.
12 * Copryright (C) 2001 Mountain View Data, Inc.
13 * Copryright (C) 2002 Cluster File Systems, Inc.
17 #include <linux/config.h>
18 #include <linux/module.h>
19 #include <linux/kernel.h>
21 #include <linux/string.h>
22 #include <linux/stat.h>
23 #include <linux/errno.h>
24 #include <linux/locks.h>
25 #include <linux/unistd.h>
27 #include <asm/system.h>
28 #include <asm/uaccess.h>
31 #include <linux/stat.h>
32 #include <asm/uaccess.h>
33 #include <asm/segment.h>
35 #define DEBUG_SUBSYSTEM S_LLIGHT
37 #include <linux/lustre_light.h>
39 kmem_cache_t *ll_file_data_slab;
40 extern struct address_space_operations ll_aops;
41 extern struct address_space_operations ll_dir_aops;
42 struct super_operations ll_super_operations;
44 static char *ll_read_opt(const char *opt, char *data)
50 CDEBUG(D_INFO, "option: %s, data %s\n", opt, data);
51 if ( strncmp(opt, data, strlen(opt)) ) {
55 if ( (value = strchr(data, '=')) == NULL ) {
61 OBD_ALLOC(retval, strlen(value) + 1);
63 CERROR("out of memory!\n");
67 memcpy(retval, value, strlen(value)+1);
68 CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
73 static void ll_options(char *options, char **dev, char **vers)
83 for (this_char = strtok (options, ",");
85 this_char = strtok (NULL, ",")) {
86 CDEBUG(D_INFO, "this_char %s\n", this_char);
87 if ( (!*dev && (*dev = ll_read_opt("device", this_char)))||
88 (!*vers && (*vers = ll_read_opt("version", this_char))) )
95 static struct super_block * ll_read_super(struct super_block *sb,
96 void *data, int silent)
98 struct inode *root = 0;
99 struct ll_sb_info *sbi;
101 char *version = NULL;
105 struct ptlrpc_request *request = NULL;
110 OBD_ALLOC(sbi, sizeof(*sbi));
115 memset(sbi, 0, sizeof(*sbi));
116 sb->u.generic_sbp = sbi;
118 ll_options(data, &device, &version);
121 CERROR("no device\n");
126 devno = simple_strtoul(device, NULL, 0);
127 if ( devno >= MAX_OBD_DEVICES ) {
128 CERROR("device of %s too high\n", device);
133 sbi->ll_conn.oc_dev = &obd_dev[devno];
134 err = obd_connect(&sbi->ll_conn);
136 CERROR("cannot connect to %s\n", device);
142 /* the first parameter should become an mds device no */
143 err = ptlrpc_connect_client(-1, "mds",
148 &sbi->ll_mds_client);
151 CERROR("cannot find MDS\n");
158 sb->s_maxbytes = 1LL << 36;
159 sb->s_blocksize = PAGE_SIZE;
160 sb->s_blocksize_bits = (unsigned char)PAGE_SHIFT;
161 sb->s_magic = LL_SUPER_MAGIC;
162 sb->s_op = &ll_super_operations;
164 /* make root inode */
165 err = mdc_getattr(&sbi->ll_mds_client, sbi->ll_rootino, S_IFDIR,
166 OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS, &request);
168 CERROR("mdc_getattr failed for root %d\n", err);
173 root = iget4(sb, sbi->ll_rootino, NULL, request->rq_rep.mds);
175 sb->s_root = d_alloc_root(root);
177 CERROR("lustre_light: bad iget4 for root\n");
183 ptlrpc_free_req(request);
185 OBD_FREE(device, strlen(device) + 1);
187 OBD_FREE(version, strlen(version) + 1);
188 if (!sb && connected)
189 obd_disconnect(&sbi->ll_conn);
199 } /* ll_read_super */
201 static void ll_put_super(struct super_block *sb)
203 struct ll_sb_info *sbi = sb->u.generic_sbp;
205 obd_disconnect(&sbi->ll_conn);
206 OBD_FREE(sb->u.generic_sbp, sizeof(*sbi));
212 extern inline struct obdo * ll_oa_from_inode(struct inode *inode, int valid);
213 static void ll_delete_inode(struct inode *inode)
215 if (S_ISREG(inode->i_mode)) {
218 oa = ll_oa_from_inode(inode, OBD_MD_FLNOTOBD);
220 CERROR("no memory\n");
223 err = obd_destroy(ll_i2obdconn(inode), oa);
224 CDEBUG(D_INODE, "obd destroy of %Ld error %d\n",
232 /* like inode_setattr, but doesn't mark the inode dirty */
233 static int ll_attr2inode(struct inode * inode, struct iattr * attr, int trunc)
235 unsigned int ia_valid = attr->ia_valid;
238 if ((ia_valid & ATTR_SIZE) && trunc ) {
239 error = vmtruncate(inode, attr->ia_size);
242 } else if (ia_valid & ATTR_SIZE) {
243 inode->i_size = attr->ia_size;
246 if (ia_valid & ATTR_UID)
247 inode->i_uid = attr->ia_uid;
248 if (ia_valid & ATTR_GID)
249 inode->i_gid = attr->ia_gid;
250 if (ia_valid & ATTR_ATIME)
251 inode->i_atime = attr->ia_atime;
252 if (ia_valid & ATTR_MTIME)
253 inode->i_mtime = attr->ia_mtime;
254 if (ia_valid & ATTR_CTIME)
255 inode->i_ctime = attr->ia_ctime;
256 if (ia_valid & ATTR_MODE) {
257 inode->i_mode = attr->ia_mode;
258 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
259 inode->i_mode &= ~S_ISGID;
265 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
267 struct ptlrpc_request *request;
268 struct ll_sb_info *sbi = ll_i2sbi(inode);
273 /* change incore inode */
274 ll_attr2inode(inode, attr, do_trunc);
276 err = mdc_setattr(&sbi->ll_mds_client, inode, attr, &request);
278 CERROR("mdc_setattr fails (%d)\n", err);
280 ptlrpc_free_req(request);
286 int ll_setattr(struct dentry *de, struct iattr *attr)
288 return ll_inode_setattr(de->d_inode, attr, 1);
291 static int ll_statfs(struct super_block *sb, struct statfs *buf)
298 err = obd_statfs(ID(sb), &tmp);
300 CERROR("obd_statfs fails (%d)\n", err);
303 memcpy(buf, &tmp, sizeof(*buf));
304 CDEBUG(D_SUPER, "statfs returns avail %ld\n", tmp.f_bavail);
310 static void inline ll_to_inode(struct inode *dst, struct mds_rep *rep)
312 struct ll_inode_info *ii =
313 (struct ll_inode_info *) &dst->u.generic_ip;
315 /* core attributes first */
316 if ( rep->valid & OBD_MD_FLID )
317 dst->i_ino = rep->ino;
318 if ( rep->valid & OBD_MD_FLATIME )
319 dst->i_atime = rep->atime;
320 if ( rep->valid & OBD_MD_FLMTIME )
321 dst->i_mtime = rep->mtime;
322 if ( rep->valid & OBD_MD_FLCTIME )
323 dst->i_ctime = rep->ctime;
324 if ( rep->valid & OBD_MD_FLSIZE )
325 dst->i_size = rep->size;
326 if ( rep->valid & OBD_MD_FLMODE )
327 dst->i_mode = rep->mode;
328 if ( rep->valid & OBD_MD_FLUID )
329 dst->i_uid = rep->uid;
330 if ( rep->valid & OBD_MD_FLGID )
331 dst->i_gid = rep->gid;
332 if ( rep->valid & OBD_MD_FLFLAGS )
333 dst->i_flags = rep->flags;
334 if ( rep->valid & OBD_MD_FLNLINK )
335 dst->i_nlink = rep->nlink;
336 if ( rep->valid & OBD_MD_FLGENER )
337 dst->i_generation = rep->generation;
339 /* this will become more elaborate for striping etc */
340 if (rep->valid & OBD_MD_FLOBJID)
341 ii->lli_objid = rep->objid;
344 if (obdo_has_inline(oa)) {
345 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
346 S_ISFIFO(inode->i_mode)) {
347 obd_rdev rdev = *((obd_rdev *)oa->o_inline);
349 "copying device %x from obdo to inode\n", rdev);
350 init_special_inode(inode, inode->i_mode, rdev);
352 CDEBUG(D_INFO, "copying inline from obdo to inode\n");
353 memcpy(oinfo->lli_inline, oa->o_inline, OBD_INLINESZ);
355 oinfo->lli_flags |= OBD_FL_INLINEDATA;
360 static inline void ll_read_inode2(struct inode *inode, void *opaque)
362 struct mds_rep *rep = opaque;
365 ll_to_inode(inode, rep);
367 /* OIDEBUG(inode); */
369 if (S_ISREG(inode->i_mode)) {
370 inode->i_op = &ll_file_inode_operations;
371 inode->i_fop = &ll_file_operations;
372 inode->i_mapping->a_ops = &ll_aops;
374 } else if (S_ISDIR(inode->i_mode)) {
375 inode->i_op = &ll_dir_inode_operations;
376 inode->i_fop = &ll_dir_operations;
377 inode->i_mapping->a_ops = &ll_dir_aops;
379 } else if (S_ISLNK(inode->i_mode)) {
380 inode->i_op = &ll_fast_symlink_inode_operations;
383 init_special_inode(inode, inode->i_mode,
384 ((int *)ll_i2info(inode)->lli_inline)[0]);
391 /* exported operations */
392 struct super_operations ll_super_operations =
394 read_inode2: ll_read_inode2,
395 delete_inode: ll_delete_inode,
396 put_super: ll_put_super,
400 struct file_system_type lustre_light_fs_type = {
401 "lustre_light", 0, ll_read_super, NULL
404 static int __init init_lustre_light(void)
406 printk(KERN_INFO "Lustre Light 0.0.1, braam@clusterfs.com\n");
407 ll_file_data_slab = kmem_cache_create("ll_file_data",
408 sizeof(struct ll_file_data), 0,
409 SLAB_HWCACHE_ALIGN, NULL, NULL);
410 if (ll_file_data_slab == NULL)
413 return register_filesystem(&lustre_light_fs_type);
416 static void __exit exit_lustre_light(void)
418 unregister_filesystem(&lustre_light_fs_type);
419 kmem_cache_destroy(ll_file_data_slab);
422 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
423 MODULE_DESCRIPTION("Lustre Light Client File System v1.0");
424 MODULE_LICENSE("GPL");
426 module_init(init_lustre_light);
427 module_exit(exit_lustre_light);