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;
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 = (struct ll_sb_info *)(&sb->u.generic_sbp);
101 char *version = NULL;
106 struct ptlrep_hdr *hdr = NULL;
111 memset(sbi, 0, sizeof(*sbi));
113 ll_options(data, &device, &version);
116 CERROR("no device\n");
121 devno = simple_strtoul(device, NULL, 0);
122 if ( devno >= MAX_OBD_DEVICES ) {
123 CERROR("device of %s too high\n", device);
128 sbi->ll_conn.oc_dev = &obd_dev[devno];
129 err = obd_connect(&sbi->ll_conn);
131 CERROR("cannot connect to %s\n", device);
137 err = kportal_uuid_to_peer("mds", &sbi->ll_peer);
139 sbi->ll_peer_ptr = &sbi->ll_peer;
144 sb->s_maxbytes = 1LL << 36;
145 sb->s_blocksize = PAGE_SIZE;
146 sb->s_blocksize_bits = (unsigned char)PAGE_SHIFT;
147 sb->s_magic = LL_SUPER_MAGIC;
148 sb->s_op = &ll_super_operations;
150 /* make root inode */
151 err = mdc_getattr(sbi->ll_peer_ptr, sbi->ll_rootino, S_IFDIR,
152 OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS,
155 CERROR("mds_getattr failed for root %d\n", err);
160 root = iget4(sb, sbi->ll_rootino, NULL, rep);
162 sb->s_root = d_alloc_root(root);
164 CERROR("lustre_light: bad iget4 for root\n");
171 /* FIXME: sigh, another stupid hardcoded size */
172 OBD_FREE(hdr, sizeof(struct ptlrep_hdr) +
173 sizeof(struct mds_rep));
175 OBD_FREE(device, strlen(device) + 1);
177 OBD_FREE(version, strlen(version) + 1);
178 if (!sb && connected)
179 obd_disconnect(&sbi->ll_conn);
189 } /* ll_read_super */
191 static void ll_put_super(struct super_block *sb)
195 obd_disconnect(ID(sb));
202 extern inline struct obdo * ll_oa_from_inode(struct inode *inode, int valid);
203 static void ll_delete_inode(struct inode *inode)
205 if (S_ISREG(inode->i_mode)) {
208 oa = ll_oa_from_inode(inode, OBD_MD_FLNOTOBD);
210 CERROR("no memory\n");
213 err = obd_destroy(IID(inode), oa);
214 CDEBUG(D_INODE, "obd destroy of %Ld error %d\n",
222 /* like inode_setattr, but doesn't mark the inode dirty */
223 static int ll_attr2inode(struct inode * inode, struct iattr * attr, int trunc)
225 unsigned int ia_valid = attr->ia_valid;
228 if ((ia_valid & ATTR_SIZE) && trunc ) {
229 error = vmtruncate(inode, attr->ia_size);
232 } else if (ia_valid & ATTR_SIZE) {
233 inode->i_size = attr->ia_size;
236 if (ia_valid & ATTR_UID)
237 inode->i_uid = attr->ia_uid;
238 if (ia_valid & ATTR_GID)
239 inode->i_gid = attr->ia_gid;
240 if (ia_valid & ATTR_ATIME)
241 inode->i_atime = attr->ia_atime;
242 if (ia_valid & ATTR_MTIME)
243 inode->i_mtime = attr->ia_mtime;
244 if (ia_valid & ATTR_CTIME)
245 inode->i_ctime = attr->ia_ctime;
246 if (ia_valid & ATTR_MODE) {
247 inode->i_mode = attr->ia_mode;
248 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
249 inode->i_mode &= ~S_ISGID;
255 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
257 struct ptlrep_hdr *hdr = NULL;
258 struct ll_sb_info *sbi = ll_i2sbi(inode);
263 /* change incore inode */
264 ll_attr2inode(inode, attr, do_trunc);
266 err = mdc_setattr(sbi->ll_peer_ptr, inode, attr, NULL, &hdr);
268 CERROR("ll_setattr fails (%d)\n", err);
274 int ll_setattr(struct dentry *de, struct iattr *attr)
276 return ll_inode_setattr(de->d_inode, attr, 1);
279 static int ll_statfs(struct super_block *sb, struct statfs *buf)
286 err = obd_statfs(ID(sb), &tmp);
288 CERROR("obd_statfs fails (%d)\n", err);
291 memcpy(buf, &tmp, sizeof(*buf));
292 CDEBUG(D_SUPER, "statfs returns avail %ld\n", tmp.f_bavail);
298 static void inline ll_to_inode(struct inode *dst, struct mds_rep *rep)
300 struct ll_inode_info *ii =
301 (struct ll_inode_info *) &dst->u.generic_ip;
303 /* core attributes first */
304 if ( rep->valid & OBD_MD_FLID )
305 dst->i_ino = rep->ino;
306 if ( rep->valid & OBD_MD_FLATIME )
307 dst->i_atime = rep->atime;
308 if ( rep->valid & OBD_MD_FLMTIME )
309 dst->i_mtime = rep->mtime;
310 if ( rep->valid & OBD_MD_FLCTIME )
311 dst->i_ctime = rep->ctime;
312 if ( rep->valid & OBD_MD_FLSIZE )
313 dst->i_size = rep->size;
314 if ( rep->valid & OBD_MD_FLMODE )
315 dst->i_mode = rep->mode;
316 if ( rep->valid & OBD_MD_FLUID )
317 dst->i_uid = rep->uid;
318 if ( rep->valid & OBD_MD_FLGID )
319 dst->i_gid = rep->gid;
320 if ( rep->valid & OBD_MD_FLFLAGS )
321 dst->i_flags = rep->flags;
322 if ( rep->valid & OBD_MD_FLNLINK )
323 dst->i_nlink = rep->nlink;
324 if ( rep->valid & OBD_MD_FLGENER )
325 dst->i_generation = rep->generation;
327 /* this will become more elaborate for striping etc */
328 if (rep->valid & OBD_MD_FLOBJID)
329 ii->lli_objid = rep->objid;
332 if (obdo_has_inline(oa)) {
333 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
334 S_ISFIFO(inode->i_mode)) {
335 obd_rdev rdev = *((obd_rdev *)oa->o_inline);
337 "copying device %x from obdo to inode\n", rdev);
338 init_special_inode(inode, inode->i_mode, rdev);
340 CDEBUG(D_INFO, "copying inline from obdo to inode\n");
341 memcpy(oinfo->lli_inline, oa->o_inline, OBD_INLINESZ);
343 oinfo->lli_flags |= OBD_FL_INLINEDATA;
348 static inline void ll_read_inode2(struct inode *inode, void *opaque)
350 struct mds_rep *rep = opaque;
353 ll_to_inode(inode, rep);
355 /* OIDEBUG(inode); */
357 if (S_ISREG(inode->i_mode)) {
358 inode->i_op = &ll_file_inode_operations;
359 inode->i_fop = &ll_file_operations;
360 inode->i_mapping->a_ops = &ll_aops;
362 } else if (S_ISDIR(inode->i_mode)) {
363 inode->i_op = &ll_dir_inode_operations;
364 inode->i_fop = &ll_dir_operations;
365 inode->i_mapping->a_ops = &ll_dir_aops;
367 } else if (S_ISLNK(inode->i_mode)) {
368 inode->i_op = &ll_fast_symlink_inode_operations;
371 init_special_inode(inode, inode->i_mode,
372 ((int *)ll_i2info(inode)->lli_inline)[0]);
379 /* exported operations */
380 struct super_operations ll_super_operations =
382 read_inode2: ll_read_inode2,
383 delete_inode: ll_delete_inode,
384 put_super: ll_put_super,
388 struct file_system_type lustre_light_fs_type = {
389 "lustre_light", 0, ll_read_super, NULL
392 static int __init init_lustre_light(void)
394 printk(KERN_INFO "Lustre Light 0.0.1, braam@clusterfs.com\n");
396 return register_filesystem(&lustre_light_fs_type);
399 static void __exit exit_lustre_light(void)
401 unregister_filesystem(&lustre_light_fs_type);
404 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
405 MODULE_DESCRIPTION("Lustre Light Client File System v1.0");
406 MODULE_LICENSE("GPL");
408 module_init(init_lustre_light);
409 module_exit(exit_lustre_light);