2 * Lustre Light Super operations
4 * This code is issued under the GNU General Public License.
5 * See the file COPYING in this distribution
7 * Copryright (C) 1996 Peter J. Braam <braam@stelias.com>
8 * Copryright (C) 1999 Stelias Computing Inc. <braam@stelias.com>
9 * Copryright (C) 1999 Seagate Technology Inc.
10 * Copryright (C) 2001 Mountain View Data, Inc.
11 * Copryright (C) 2002 Cluster File Systems, Inc.
15 #include <linux/config.h>
16 #include <linux/module.h>
17 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/stat.h>
21 #include <linux/errno.h>
22 #include <linux/locks.h>
23 #include <linux/unistd.h>
25 #include <asm/system.h>
26 #include <asm/uaccess.h>
29 #include <linux/stat.h>
30 #include <asm/uaccess.h>
31 #include <asm/segment.h>
33 #define DEBUG_SUBSYSTEM S_LLIGHT
35 #include <linux/obd_support.h>
36 #include <linux/obd_class.h>
37 #include <linux/lustre_light.h>
39 extern struct address_space_operations ll_aops;
40 extern struct address_space_operations ll_dir_aops;
41 struct super_operations ll_super_operations;
43 static char *ll_read_opt(const char *opt, char *data)
49 CDEBUG(D_INFO, "option: %s, data %s\n", opt, data);
50 if ( strncmp(opt, data, strlen(opt)) ) {
54 if ( (value = strchr(data, '=')) == NULL ) {
60 OBD_ALLOC(retval, strlen(value) + 1);
62 CERROR("out of memory!\n");
66 memcpy(retval, value, strlen(value)+1);
67 CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
72 static void ll_options(char *options, char **dev, char **vers)
82 for (this_char = strtok (options, ",");
84 this_char = strtok (NULL, ",")) {
85 CDEBUG(D_INFO, "this_char %s\n", this_char);
86 if ( (!*dev && (*dev = ll_read_opt("device", this_char)))||
87 (!*vers && (*vers = ll_read_opt("version", this_char))) )
94 static struct super_block * ll_read_super(struct super_block *sb,
95 void *data, int silent)
97 struct inode *root = 0;
98 struct ll_sb_info *sbi;
100 char *version = NULL;
104 struct ptlrpc_request *request = NULL;
109 OBD_ALLOC(sbi, sizeof(*sbi));
114 memset(sbi, 0, sizeof(*sbi));
115 sb->u.generic_sbp = (struct ll_sb_info *) sbi;
117 ll_options(data, &device, &version);
120 CERROR("no device\n");
125 devno = simple_strtoul(device, NULL, 0);
126 if ( devno >= MAX_OBD_DEVICES ) {
127 CERROR("device of %s too high\n", device);
132 sbi->ll_conn.oc_dev = &obd_dev[devno];
133 err = obd_connect(&sbi->ll_conn);
135 CERROR("cannot connect to %s\n", device);
141 /* the first parameter should become an mds device no */
142 err = ptlrpc_connect_client(-1, "mds",
147 &sbi->ll_mds_client);
150 CERROR("cannot find MDS\n");
157 sb->s_maxbytes = 1LL << 36;
158 sb->s_blocksize = PAGE_SIZE;
159 sb->s_blocksize_bits = (unsigned char)PAGE_SHIFT;
160 sb->s_magic = LL_SUPER_MAGIC;
161 sb->s_op = &ll_super_operations;
163 /* make root inode */
164 err = mdc_getattr(&sbi->ll_mds_client, sbi->ll_rootino, S_IFDIR,
165 OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS, &request);
167 CERROR("mdc_getattr failed for root %d\n", err);
172 root = iget4(sb, sbi->ll_rootino, NULL, request->rq_rep.mds);
174 sb->s_root = d_alloc_root(root);
176 CERROR("lustre_light: bad iget4 for root\n");
182 ptlrpc_free_req(request);
184 OBD_FREE(device, strlen(device) + 1);
186 OBD_FREE(version, strlen(version) + 1);
187 if (!sb && connected)
188 obd_disconnect(&sbi->ll_conn);
198 } /* ll_read_super */
200 static void ll_put_super(struct super_block *sb)
202 struct ll_sb_info *sbi = sb->u.generic_sbp;
204 obd_disconnect(&sbi->ll_conn);
205 OBD_FREE(sb->u.generic_sbp, sizeof(struct ll_sb_info));
211 extern inline struct obdo * ll_oa_from_inode(struct inode *inode, int valid);
212 static void ll_delete_inode(struct inode *inode)
214 if (S_ISREG(inode->i_mode)) {
217 oa = ll_oa_from_inode(inode, OBD_MD_FLNOTOBD);
219 CERROR("no memory\n");
222 err = obd_destroy(ll_i2obdconn(inode), oa);
223 CDEBUG(D_INODE, "obd destroy of %Ld error %d\n",
231 /* like inode_setattr, but doesn't mark the inode dirty */
232 static int ll_attr2inode(struct inode * inode, struct iattr * attr, int trunc)
234 unsigned int ia_valid = attr->ia_valid;
237 if ((ia_valid & ATTR_SIZE) && trunc ) {
238 error = vmtruncate(inode, attr->ia_size);
241 } else if (ia_valid & ATTR_SIZE) {
242 inode->i_size = attr->ia_size;
245 if (ia_valid & ATTR_UID)
246 inode->i_uid = attr->ia_uid;
247 if (ia_valid & ATTR_GID)
248 inode->i_gid = attr->ia_gid;
249 if (ia_valid & ATTR_ATIME)
250 inode->i_atime = attr->ia_atime;
251 if (ia_valid & ATTR_MTIME)
252 inode->i_mtime = attr->ia_mtime;
253 if (ia_valid & ATTR_CTIME)
254 inode->i_ctime = attr->ia_ctime;
255 if (ia_valid & ATTR_MODE) {
256 inode->i_mode = attr->ia_mode;
257 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
258 inode->i_mode &= ~S_ISGID;
264 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
266 struct ptlrpc_request *request;
267 struct ll_sb_info *sbi = ll_i2sbi(inode);
272 /* change incore inode */
273 ll_attr2inode(inode, attr, do_trunc);
275 err = mdc_setattr(&sbi->ll_mds_client, inode, attr, &request);
277 CERROR("mdc_setattr fails (%d)\n", err);
279 ptlrpc_free_req(request);
285 int ll_setattr(struct dentry *de, struct iattr *attr)
287 return ll_inode_setattr(de->d_inode, attr, 1);
290 static int ll_statfs(struct super_block *sb, struct statfs *buf)
297 err = obd_statfs(ID(sb), &tmp);
299 CERROR("obd_statfs fails (%d)\n", err);
302 memcpy(buf, &tmp, sizeof(*buf));
303 CDEBUG(D_SUPER, "statfs returns avail %ld\n", tmp.f_bavail);
309 static void inline ll_to_inode(struct inode *dst, struct mds_rep *rep)
311 struct ll_inode_info *ii =
312 (struct ll_inode_info *) &dst->u.generic_ip;
314 /* core attributes first */
315 if ( rep->valid & OBD_MD_FLID )
316 dst->i_ino = rep->ino;
317 if ( rep->valid & OBD_MD_FLATIME )
318 dst->i_atime = rep->atime;
319 if ( rep->valid & OBD_MD_FLMTIME )
320 dst->i_mtime = rep->mtime;
321 if ( rep->valid & OBD_MD_FLCTIME )
322 dst->i_ctime = rep->ctime;
323 if ( rep->valid & OBD_MD_FLSIZE )
324 dst->i_size = rep->size;
325 if ( rep->valid & OBD_MD_FLMODE )
326 dst->i_mode = rep->mode;
327 if ( rep->valid & OBD_MD_FLUID )
328 dst->i_uid = rep->uid;
329 if ( rep->valid & OBD_MD_FLGID )
330 dst->i_gid = rep->gid;
331 if ( rep->valid & OBD_MD_FLFLAGS )
332 dst->i_flags = rep->flags;
333 if ( rep->valid & OBD_MD_FLNLINK )
334 dst->i_nlink = rep->nlink;
335 if ( rep->valid & OBD_MD_FLGENER )
336 dst->i_generation = rep->generation;
338 /* this will become more elaborate for striping etc */
339 if (rep->valid & OBD_MD_FLOBJID)
340 ii->lli_objid = rep->objid;
343 if (obdo_has_inline(oa)) {
344 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
345 S_ISFIFO(inode->i_mode)) {
346 obd_rdev rdev = *((obd_rdev *)oa->o_inline);
348 "copying device %x from obdo to inode\n", rdev);
349 init_special_inode(inode, inode->i_mode, rdev);
351 CDEBUG(D_INFO, "copying inline from obdo to inode\n");
352 memcpy(oinfo->lli_inline, oa->o_inline, OBD_INLINESZ);
354 oinfo->lli_flags |= OBD_FL_INLINEDATA;
359 static inline void ll_read_inode2(struct inode *inode, void *opaque)
361 struct mds_rep *rep = opaque;
364 ll_to_inode(inode, rep);
366 /* OIDEBUG(inode); */
368 if (S_ISREG(inode->i_mode)) {
369 inode->i_op = &ll_file_inode_operations;
370 inode->i_fop = &ll_file_operations;
371 inode->i_mapping->a_ops = &ll_aops;
373 } else if (S_ISDIR(inode->i_mode)) {
374 inode->i_op = &ll_dir_inode_operations;
375 inode->i_fop = &ll_dir_operations;
376 inode->i_mapping->a_ops = &ll_dir_aops;
378 } else if (S_ISLNK(inode->i_mode)) {
379 inode->i_op = &ll_fast_symlink_inode_operations;
382 init_special_inode(inode, inode->i_mode,
383 ((int *)ll_i2info(inode)->lli_inline)[0]);
390 /* exported operations */
391 struct super_operations ll_super_operations =
393 read_inode2: ll_read_inode2,
394 delete_inode: ll_delete_inode,
395 put_super: ll_put_super,
399 struct file_system_type lustre_light_fs_type = {
400 "lustre_light", 0, ll_read_super, NULL
403 static int __init init_lustre_light(void)
405 printk(KERN_INFO "Lustre Light 0.0.1, braam@clusterfs.com\n");
407 return register_filesystem(&lustre_light_fs_type);
410 static void __exit exit_lustre_light(void)
412 unregister_filesystem(&lustre_light_fs_type);
415 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
416 MODULE_DESCRIPTION("Lustre Light Client File System v1.0");
417 MODULE_LICENSE("GPL");
419 module_init(init_lustre_light);
420 module_exit(exit_lustre_light);