1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * (C) 2001 Clemson University and The University of Chicago
4  *
5  * See COPYING in top-level directory.
6  */
7 
8 #include "protocol.h"
9 #include "orangefs-kernel.h"
10 #include "orangefs-bufmap.h"
11 
12 #include <linux/parser.h>
13 #include <linux/hashtable.h>
14 #include <linux/seq_file.h>
15 
16 /* a cache for orangefs-inode objects (i.e. orangefs inode private data) */
17 static struct kmem_cache *orangefs_inode_cache;
18 
19 /* list for storing orangefs specific superblocks in use */
20 LIST_HEAD(orangefs_superblocks);
21 
22 DEFINE_SPINLOCK(orangefs_superblocks_lock);
23 
24 enum {
25 	Opt_intr,
26 	Opt_acl,
27 	Opt_local_lock,
28 
29 	Opt_err
30 };
31 
32 static const match_table_t tokens = {
33 	{ Opt_acl,		"acl" },
34 	{ Opt_intr,		"intr" },
35 	{ Opt_local_lock,	"local_lock" },
36 	{ Opt_err,	NULL }
37 };
38 
39 uint64_t orangefs_features;
40 
orangefs_show_options(struct seq_file * m,struct dentry * root)41 static int orangefs_show_options(struct seq_file *m, struct dentry *root)
42 {
43 	struct orangefs_sb_info_s *orangefs_sb = ORANGEFS_SB(root->d_sb);
44 
45 	if (root->d_sb->s_flags & SB_POSIXACL)
46 		seq_puts(m, ",acl");
47 	if (orangefs_sb->flags & ORANGEFS_OPT_INTR)
48 		seq_puts(m, ",intr");
49 	if (orangefs_sb->flags & ORANGEFS_OPT_LOCAL_LOCK)
50 		seq_puts(m, ",local_lock");
51 	return 0;
52 }
53 
parse_mount_options(struct super_block * sb,char * options,int silent)54 static int parse_mount_options(struct super_block *sb, char *options,
55 		int silent)
56 {
57 	struct orangefs_sb_info_s *orangefs_sb = ORANGEFS_SB(sb);
58 	substring_t args[MAX_OPT_ARGS];
59 	char *p;
60 
61 	/*
62 	 * Force any potential flags that might be set from the mount
63 	 * to zero, ie, initialize to unset.
64 	 */
65 	sb->s_flags &= ~SB_POSIXACL;
66 	orangefs_sb->flags &= ~ORANGEFS_OPT_INTR;
67 	orangefs_sb->flags &= ~ORANGEFS_OPT_LOCAL_LOCK;
68 
69 	while ((p = strsep(&options, ",")) != NULL) {
70 		int token;
71 
72 		if (!*p)
73 			continue;
74 
75 		token = match_token(p, tokens, args);
76 		switch (token) {
77 		case Opt_acl:
78 			sb->s_flags |= SB_POSIXACL;
79 			break;
80 		case Opt_intr:
81 			orangefs_sb->flags |= ORANGEFS_OPT_INTR;
82 			break;
83 		case Opt_local_lock:
84 			orangefs_sb->flags |= ORANGEFS_OPT_LOCAL_LOCK;
85 			break;
86 		default:
87 			goto fail;
88 		}
89 	}
90 
91 	return 0;
92 fail:
93 	if (!silent)
94 		gossip_err("Error: mount option [%s] is not supported.\n", p);
95 	return -EINVAL;
96 }
97 
orangefs_inode_cache_ctor(void * req)98 static void orangefs_inode_cache_ctor(void *req)
99 {
100 	struct orangefs_inode_s *orangefs_inode = req;
101 
102 	inode_init_once(&orangefs_inode->vfs_inode);
103 	init_rwsem(&orangefs_inode->xattr_sem);
104 }
105 
orangefs_alloc_inode(struct super_block * sb)106 static struct inode *orangefs_alloc_inode(struct super_block *sb)
107 {
108 	struct orangefs_inode_s *orangefs_inode;
109 
110 	orangefs_inode = alloc_inode_sb(sb, orangefs_inode_cache, GFP_KERNEL);
111 	if (!orangefs_inode)
112 		return NULL;
113 
114 	/*
115 	 * We want to clear everything except for rw_semaphore and the
116 	 * vfs_inode.
117 	 */
118 	memset(&orangefs_inode->refn.khandle, 0, 16);
119 	orangefs_inode->refn.fs_id = ORANGEFS_FS_ID_NULL;
120 	orangefs_inode->last_failed_block_index_read = 0;
121 	memset(orangefs_inode->link_target, 0, sizeof(orangefs_inode->link_target));
122 
123 	gossip_debug(GOSSIP_SUPER_DEBUG,
124 		     "orangefs_alloc_inode: allocated %p\n",
125 		     &orangefs_inode->vfs_inode);
126 	return &orangefs_inode->vfs_inode;
127 }
128 
orangefs_free_inode(struct inode * inode)129 static void orangefs_free_inode(struct inode *inode)
130 {
131 	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
132 	struct orangefs_cached_xattr *cx;
133 	struct hlist_node *tmp;
134 	int i;
135 
136 	hash_for_each_safe(orangefs_inode->xattr_cache, i, tmp, cx, node) {
137 		hlist_del(&cx->node);
138 		kfree(cx);
139 	}
140 
141 	kmem_cache_free(orangefs_inode_cache, orangefs_inode);
142 }
143 
orangefs_destroy_inode(struct inode * inode)144 static void orangefs_destroy_inode(struct inode *inode)
145 {
146 	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
147 
148 	gossip_debug(GOSSIP_SUPER_DEBUG,
149 			"%s: deallocated %p destroying inode %pU\n",
150 			__func__, orangefs_inode, get_khandle_from_ino(inode));
151 }
152 
orangefs_write_inode(struct inode * inode,struct writeback_control * wbc)153 static int orangefs_write_inode(struct inode *inode,
154 				struct writeback_control *wbc)
155 {
156 	gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_write_inode\n");
157 	return orangefs_inode_setattr(inode);
158 }
159 
160 /*
161  * NOTE: information filled in here is typically reflected in the
162  * output of the system command 'df'
163 */
orangefs_statfs(struct dentry * dentry,struct kstatfs * buf)164 static int orangefs_statfs(struct dentry *dentry, struct kstatfs *buf)
165 {
166 	int ret = -ENOMEM;
167 	struct orangefs_kernel_op_s *new_op = NULL;
168 	int flags = 0;
169 	struct super_block *sb = NULL;
170 
171 	sb = dentry->d_sb;
172 
173 	gossip_debug(GOSSIP_SUPER_DEBUG,
174 			"%s: called on sb %p (fs_id is %d)\n",
175 			__func__,
176 			sb,
177 			(int)(ORANGEFS_SB(sb)->fs_id));
178 
179 	new_op = op_alloc(ORANGEFS_VFS_OP_STATFS);
180 	if (!new_op)
181 		return ret;
182 	new_op->upcall.req.statfs.fs_id = ORANGEFS_SB(sb)->fs_id;
183 
184 	if (ORANGEFS_SB(sb)->flags & ORANGEFS_OPT_INTR)
185 		flags = ORANGEFS_OP_INTERRUPTIBLE;
186 
187 	ret = service_operation(new_op, "orangefs_statfs", flags);
188 
189 	if (new_op->downcall.status < 0)
190 		goto out_op_release;
191 
192 	gossip_debug(GOSSIP_SUPER_DEBUG,
193 		     "%s: got %ld blocks available | "
194 		     "%ld blocks total | %ld block size | "
195 		     "%ld files total | %ld files avail\n",
196 		     __func__,
197 		     (long)new_op->downcall.resp.statfs.blocks_avail,
198 		     (long)new_op->downcall.resp.statfs.blocks_total,
199 		     (long)new_op->downcall.resp.statfs.block_size,
200 		     (long)new_op->downcall.resp.statfs.files_total,
201 		     (long)new_op->downcall.resp.statfs.files_avail);
202 
203 	buf->f_type = sb->s_magic;
204 	memcpy(&buf->f_fsid, &ORANGEFS_SB(sb)->fs_id, sizeof(buf->f_fsid));
205 	buf->f_bsize = new_op->downcall.resp.statfs.block_size;
206 	buf->f_namelen = ORANGEFS_NAME_MAX;
207 
208 	buf->f_blocks = (sector_t) new_op->downcall.resp.statfs.blocks_total;
209 	buf->f_bfree = (sector_t) new_op->downcall.resp.statfs.blocks_avail;
210 	buf->f_bavail = (sector_t) new_op->downcall.resp.statfs.blocks_avail;
211 	buf->f_files = (sector_t) new_op->downcall.resp.statfs.files_total;
212 	buf->f_ffree = (sector_t) new_op->downcall.resp.statfs.files_avail;
213 	buf->f_frsize = 0;
214 
215 out_op_release:
216 	op_release(new_op);
217 	gossip_debug(GOSSIP_SUPER_DEBUG, "%s: returning %d\n", __func__, ret);
218 	return ret;
219 }
220 
221 /*
222  * Remount as initiated by VFS layer.  We just need to reparse the mount
223  * options, no need to signal pvfs2-client-core about it.
224  */
orangefs_remount_fs(struct super_block * sb,int * flags,char * data)225 static int orangefs_remount_fs(struct super_block *sb, int *flags, char *data)
226 {
227 	gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_remount_fs: called\n");
228 	return parse_mount_options(sb, data, 1);
229 }
230 
231 /*
232  * Remount as initiated by pvfs2-client-core on restart.  This is used to
233  * repopulate mount information left from previous pvfs2-client-core.
234  *
235  * the idea here is that given a valid superblock, we're
236  * re-initializing the user space client with the initial mount
237  * information specified when the super block was first initialized.
238  * this is very different than the first initialization/creation of a
239  * superblock.  we use the special service_priority_operation to make
240  * sure that the mount gets ahead of any other pending operation that
241  * is waiting for servicing.  this means that the pvfs2-client won't
242  * fail to start several times for all other pending operations before
243  * the client regains all of the mount information from us.
244  * NOTE: this function assumes that the request_mutex is already acquired!
245  */
orangefs_remount(struct orangefs_sb_info_s * orangefs_sb)246 int orangefs_remount(struct orangefs_sb_info_s *orangefs_sb)
247 {
248 	struct orangefs_kernel_op_s *new_op;
249 	int ret = -EINVAL;
250 
251 	gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_remount: called\n");
252 
253 	new_op = op_alloc(ORANGEFS_VFS_OP_FS_MOUNT);
254 	if (!new_op)
255 		return -ENOMEM;
256 	strncpy(new_op->upcall.req.fs_mount.orangefs_config_server,
257 		orangefs_sb->devname,
258 		ORANGEFS_MAX_SERVER_ADDR_LEN);
259 
260 	gossip_debug(GOSSIP_SUPER_DEBUG,
261 		     "Attempting ORANGEFS Remount via host %s\n",
262 		     new_op->upcall.req.fs_mount.orangefs_config_server);
263 
264 	/*
265 	 * we assume that the calling function has already acquired the
266 	 * request_mutex to prevent other operations from bypassing
267 	 * this one
268 	 */
269 	ret = service_operation(new_op, "orangefs_remount",
270 		ORANGEFS_OP_PRIORITY | ORANGEFS_OP_NO_MUTEX);
271 	gossip_debug(GOSSIP_SUPER_DEBUG,
272 		     "orangefs_remount: mount got return value of %d\n",
273 		     ret);
274 	if (ret == 0) {
275 		/*
276 		 * store the id assigned to this sb -- it's just a
277 		 * short-lived mapping that the system interface uses
278 		 * to map this superblock to a particular mount entry
279 		 */
280 		orangefs_sb->id = new_op->downcall.resp.fs_mount.id;
281 		orangefs_sb->mount_pending = 0;
282 	}
283 
284 	op_release(new_op);
285 
286 	if (orangefs_userspace_version >= 20906) {
287 		new_op = op_alloc(ORANGEFS_VFS_OP_FEATURES);
288 		if (!new_op)
289 			return -ENOMEM;
290 		new_op->upcall.req.features.features = 0;
291 		ret = service_operation(new_op, "orangefs_features",
292 		    ORANGEFS_OP_PRIORITY | ORANGEFS_OP_NO_MUTEX);
293 		if (!ret)
294 			orangefs_features =
295 			    new_op->downcall.resp.features.features;
296 		else
297 			orangefs_features = 0;
298 		op_release(new_op);
299 	} else {
300 		orangefs_features = 0;
301 	}
302 
303 	return ret;
304 }
305 
fsid_key_table_initialize(void)306 int fsid_key_table_initialize(void)
307 {
308 	return 0;
309 }
310 
fsid_key_table_finalize(void)311 void fsid_key_table_finalize(void)
312 {
313 }
314 
315 static const struct super_operations orangefs_s_ops = {
316 	.alloc_inode = orangefs_alloc_inode,
317 	.free_inode = orangefs_free_inode,
318 	.destroy_inode = orangefs_destroy_inode,
319 	.write_inode = orangefs_write_inode,
320 	.drop_inode = generic_delete_inode,
321 	.statfs = orangefs_statfs,
322 	.remount_fs = orangefs_remount_fs,
323 	.show_options = orangefs_show_options,
324 };
325 
orangefs_fh_to_dentry(struct super_block * sb,struct fid * fid,int fh_len,int fh_type)326 static struct dentry *orangefs_fh_to_dentry(struct super_block *sb,
327 				  struct fid *fid,
328 				  int fh_len,
329 				  int fh_type)
330 {
331 	struct orangefs_object_kref refn;
332 
333 	if (fh_len < 5 || fh_type > 2)
334 		return NULL;
335 
336 	ORANGEFS_khandle_from(&(refn.khandle), fid->raw, 16);
337 	refn.fs_id = (u32) fid->raw[4];
338 	gossip_debug(GOSSIP_SUPER_DEBUG,
339 		     "fh_to_dentry: handle %pU, fs_id %d\n",
340 		     &refn.khandle,
341 		     refn.fs_id);
342 
343 	return d_obtain_alias(orangefs_iget(sb, &refn));
344 }
345 
orangefs_encode_fh(struct inode * inode,__u32 * fh,int * max_len,struct inode * parent)346 static int orangefs_encode_fh(struct inode *inode,
347 		    __u32 *fh,
348 		    int *max_len,
349 		    struct inode *parent)
350 {
351 	int len = parent ? 10 : 5;
352 	int type = 1;
353 	struct orangefs_object_kref refn;
354 
355 	if (*max_len < len) {
356 		gossip_err("fh buffer is too small for encoding\n");
357 		*max_len = len;
358 		type = 255;
359 		goto out;
360 	}
361 
362 	refn = ORANGEFS_I(inode)->refn;
363 	ORANGEFS_khandle_to(&refn.khandle, fh, 16);
364 	fh[4] = refn.fs_id;
365 
366 	gossip_debug(GOSSIP_SUPER_DEBUG,
367 		     "Encoding fh: handle %pU, fsid %u\n",
368 		     &refn.khandle,
369 		     refn.fs_id);
370 
371 
372 	if (parent) {
373 		refn = ORANGEFS_I(parent)->refn;
374 		ORANGEFS_khandle_to(&refn.khandle, (char *) fh + 20, 16);
375 		fh[9] = refn.fs_id;
376 
377 		type = 2;
378 		gossip_debug(GOSSIP_SUPER_DEBUG,
379 			     "Encoding parent: handle %pU, fsid %u\n",
380 			     &refn.khandle,
381 			     refn.fs_id);
382 	}
383 	*max_len = len;
384 
385 out:
386 	return type;
387 }
388 
389 static const struct export_operations orangefs_export_ops = {
390 	.encode_fh = orangefs_encode_fh,
391 	.fh_to_dentry = orangefs_fh_to_dentry,
392 };
393 
orangefs_unmount(int id,__s32 fs_id,const char * devname)394 static int orangefs_unmount(int id, __s32 fs_id, const char *devname)
395 {
396 	struct orangefs_kernel_op_s *op;
397 	int r;
398 	op = op_alloc(ORANGEFS_VFS_OP_FS_UMOUNT);
399 	if (!op)
400 		return -ENOMEM;
401 	op->upcall.req.fs_umount.id = id;
402 	op->upcall.req.fs_umount.fs_id = fs_id;
403 	strncpy(op->upcall.req.fs_umount.orangefs_config_server,
404 	    devname, ORANGEFS_MAX_SERVER_ADDR_LEN - 1);
405 	r = service_operation(op, "orangefs_fs_umount", 0);
406 	/* Not much to do about an error here. */
407 	if (r)
408 		gossip_err("orangefs_unmount: service_operation %d\n", r);
409 	op_release(op);
410 	return r;
411 }
412 
orangefs_fill_sb(struct super_block * sb,struct orangefs_fs_mount_response * fs_mount,void * data,int silent)413 static int orangefs_fill_sb(struct super_block *sb,
414 		struct orangefs_fs_mount_response *fs_mount,
415 		void *data, int silent)
416 {
417 	int ret;
418 	struct inode *root;
419 	struct dentry *root_dentry;
420 	struct orangefs_object_kref root_object;
421 
422 	ORANGEFS_SB(sb)->sb = sb;
423 
424 	ORANGEFS_SB(sb)->root_khandle = fs_mount->root_khandle;
425 	ORANGEFS_SB(sb)->fs_id = fs_mount->fs_id;
426 	ORANGEFS_SB(sb)->id = fs_mount->id;
427 
428 	if (data) {
429 		ret = parse_mount_options(sb, data, silent);
430 		if (ret)
431 			return ret;
432 	}
433 
434 	/* Hang the xattr handlers off the superblock */
435 	sb->s_xattr = orangefs_xattr_handlers;
436 	sb->s_magic = ORANGEFS_SUPER_MAGIC;
437 	sb->s_op = &orangefs_s_ops;
438 	sb->s_d_op = &orangefs_dentry_operations;
439 
440 	sb->s_blocksize = PAGE_SIZE;
441 	sb->s_blocksize_bits = PAGE_SHIFT;
442 	sb->s_maxbytes = MAX_LFS_FILESIZE;
443 
444 	ret = super_setup_bdi(sb);
445 	if (ret)
446 		return ret;
447 
448 	root_object.khandle = ORANGEFS_SB(sb)->root_khandle;
449 	root_object.fs_id = ORANGEFS_SB(sb)->fs_id;
450 	gossip_debug(GOSSIP_SUPER_DEBUG,
451 		     "get inode %pU, fsid %d\n",
452 		     &root_object.khandle,
453 		     root_object.fs_id);
454 
455 	root = orangefs_iget(sb, &root_object);
456 	if (IS_ERR(root))
457 		return PTR_ERR(root);
458 
459 	gossip_debug(GOSSIP_SUPER_DEBUG,
460 		     "Allocated root inode [%p] with mode %x\n",
461 		     root,
462 		     root->i_mode);
463 
464 	/* allocates and places root dentry in dcache */
465 	root_dentry = d_make_root(root);
466 	if (!root_dentry)
467 		return -ENOMEM;
468 
469 	sb->s_export_op = &orangefs_export_ops;
470 	sb->s_root = root_dentry;
471 	return 0;
472 }
473 
orangefs_mount(struct file_system_type * fst,int flags,const char * devname,void * data)474 struct dentry *orangefs_mount(struct file_system_type *fst,
475 			   int flags,
476 			   const char *devname,
477 			   void *data)
478 {
479 	int ret;
480 	struct super_block *sb = ERR_PTR(-EINVAL);
481 	struct orangefs_kernel_op_s *new_op;
482 	struct dentry *d = ERR_PTR(-EINVAL);
483 
484 	gossip_debug(GOSSIP_SUPER_DEBUG,
485 		     "orangefs_mount: called with devname %s\n",
486 		     devname);
487 
488 	if (!devname) {
489 		gossip_err("ERROR: device name not specified.\n");
490 		return ERR_PTR(-EINVAL);
491 	}
492 
493 	new_op = op_alloc(ORANGEFS_VFS_OP_FS_MOUNT);
494 	if (!new_op)
495 		return ERR_PTR(-ENOMEM);
496 
497 	strncpy(new_op->upcall.req.fs_mount.orangefs_config_server,
498 		devname,
499 		ORANGEFS_MAX_SERVER_ADDR_LEN - 1);
500 
501 	gossip_debug(GOSSIP_SUPER_DEBUG,
502 		     "Attempting ORANGEFS Mount via host %s\n",
503 		     new_op->upcall.req.fs_mount.orangefs_config_server);
504 
505 	ret = service_operation(new_op, "orangefs_mount", 0);
506 	gossip_debug(GOSSIP_SUPER_DEBUG,
507 		     "orangefs_mount: mount got return value of %d\n", ret);
508 	if (ret)
509 		goto free_op;
510 
511 	if (new_op->downcall.resp.fs_mount.fs_id == ORANGEFS_FS_ID_NULL) {
512 		gossip_err("ERROR: Retrieved null fs_id\n");
513 		ret = -EINVAL;
514 		goto free_op;
515 	}
516 
517 	sb = sget(fst, NULL, set_anon_super, flags, NULL);
518 
519 	if (IS_ERR(sb)) {
520 		d = ERR_CAST(sb);
521 		orangefs_unmount(new_op->downcall.resp.fs_mount.id,
522 		    new_op->downcall.resp.fs_mount.fs_id, devname);
523 		goto free_op;
524 	}
525 
526 	/* alloc and init our private orangefs sb info */
527 	sb->s_fs_info = kzalloc(sizeof(struct orangefs_sb_info_s), GFP_KERNEL);
528 	if (!ORANGEFS_SB(sb)) {
529 		d = ERR_PTR(-ENOMEM);
530 		goto free_sb_and_op;
531 	}
532 
533 	ret = orangefs_fill_sb(sb,
534 	      &new_op->downcall.resp.fs_mount, data,
535 	      flags & SB_SILENT ? 1 : 0);
536 
537 	if (ret) {
538 		d = ERR_PTR(ret);
539 		goto free_sb_and_op;
540 	}
541 
542 	/*
543 	 * on successful mount, store the devname and data
544 	 * used
545 	 */
546 	strncpy(ORANGEFS_SB(sb)->devname,
547 		devname,
548 		ORANGEFS_MAX_SERVER_ADDR_LEN - 1);
549 
550 	/* mount_pending must be cleared */
551 	ORANGEFS_SB(sb)->mount_pending = 0;
552 
553 	/*
554 	 * finally, add this sb to our list of known orangefs
555 	 * sb's
556 	 */
557 	gossip_debug(GOSSIP_SUPER_DEBUG,
558 		     "Adding SB %p to orangefs superblocks\n",
559 		     ORANGEFS_SB(sb));
560 	spin_lock(&orangefs_superblocks_lock);
561 	list_add_tail(&ORANGEFS_SB(sb)->list, &orangefs_superblocks);
562 	spin_unlock(&orangefs_superblocks_lock);
563 	op_release(new_op);
564 
565 	/* Must be removed from the list now. */
566 	ORANGEFS_SB(sb)->no_list = 0;
567 
568 	if (orangefs_userspace_version >= 20906) {
569 		new_op = op_alloc(ORANGEFS_VFS_OP_FEATURES);
570 		if (!new_op)
571 			return ERR_PTR(-ENOMEM);
572 		new_op->upcall.req.features.features = 0;
573 		ret = service_operation(new_op, "orangefs_features", 0);
574 		orangefs_features = new_op->downcall.resp.features.features;
575 		op_release(new_op);
576 	} else {
577 		orangefs_features = 0;
578 	}
579 
580 	return dget(sb->s_root);
581 
582 free_sb_and_op:
583 	/* Will call orangefs_kill_sb with sb not in list. */
584 	ORANGEFS_SB(sb)->no_list = 1;
585 	/* ORANGEFS_VFS_OP_FS_UMOUNT is done by orangefs_kill_sb. */
586 	deactivate_locked_super(sb);
587 free_op:
588 	gossip_err("orangefs_mount: mount request failed with %d\n", ret);
589 	if (ret == -EINVAL) {
590 		gossip_err("Ensure that all orangefs-servers have the same FS configuration files\n");
591 		gossip_err("Look at pvfs2-client-core log file (typically /tmp/pvfs2-client.log) for more details\n");
592 	}
593 
594 	op_release(new_op);
595 
596 	return d;
597 }
598 
orangefs_kill_sb(struct super_block * sb)599 void orangefs_kill_sb(struct super_block *sb)
600 {
601 	int r;
602 	gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_kill_sb: called\n");
603 
604 	/* provided sb cleanup */
605 	kill_anon_super(sb);
606 
607 	if (!ORANGEFS_SB(sb)) {
608 		mutex_lock(&orangefs_request_mutex);
609 		mutex_unlock(&orangefs_request_mutex);
610 		return;
611 	}
612 	/*
613 	 * issue the unmount to userspace to tell it to remove the
614 	 * dynamic mount info it has for this superblock
615 	 */
616 	r = orangefs_unmount(ORANGEFS_SB(sb)->id, ORANGEFS_SB(sb)->fs_id,
617 	    ORANGEFS_SB(sb)->devname);
618 	if (!r)
619 		ORANGEFS_SB(sb)->mount_pending = 1;
620 
621 	if (!ORANGEFS_SB(sb)->no_list) {
622 		/* remove the sb from our list of orangefs specific sb's */
623 		spin_lock(&orangefs_superblocks_lock);
624 		/* not list_del_init */
625 		__list_del_entry(&ORANGEFS_SB(sb)->list);
626 		ORANGEFS_SB(sb)->list.prev = NULL;
627 		spin_unlock(&orangefs_superblocks_lock);
628 	}
629 
630 	/*
631 	 * make sure that ORANGEFS_DEV_REMOUNT_ALL loop that might've seen us
632 	 * gets completed before we free the dang thing.
633 	 */
634 	mutex_lock(&orangefs_request_mutex);
635 	mutex_unlock(&orangefs_request_mutex);
636 
637 	/* free the orangefs superblock private data */
638 	kfree(ORANGEFS_SB(sb));
639 }
640 
orangefs_inode_cache_initialize(void)641 int orangefs_inode_cache_initialize(void)
642 {
643 	orangefs_inode_cache = kmem_cache_create_usercopy(
644 					"orangefs_inode_cache",
645 					sizeof(struct orangefs_inode_s),
646 					0,
647 					ORANGEFS_CACHE_CREATE_FLAGS,
648 					offsetof(struct orangefs_inode_s,
649 						link_target),
650 					sizeof_field(struct orangefs_inode_s,
651 						link_target),
652 					orangefs_inode_cache_ctor);
653 
654 	if (!orangefs_inode_cache) {
655 		gossip_err("Cannot create orangefs_inode_cache\n");
656 		return -ENOMEM;
657 	}
658 	return 0;
659 }
660 
orangefs_inode_cache_finalize(void)661 int orangefs_inode_cache_finalize(void)
662 {
663 	kmem_cache_destroy(orangefs_inode_cache);
664 	return 0;
665 }
666