Loading...
1/*
2 * (C) 2001 Clemson University and The University of Chicago
3 *
4 * See COPYING in top-level directory.
5 */
6
7/*
8 * Linux VFS inode operations.
9 */
10
11#include "protocol.h"
12#include "orangefs-kernel.h"
13#include "orangefs-bufmap.h"
14
15static int read_one_page(struct page *page)
16{
17 int ret;
18 int max_block;
19 ssize_t bytes_read = 0;
20 struct inode *inode = page->mapping->host;
21 const __u32 blocksize = PAGE_SIZE; /* inode->i_blksize */
22 const __u32 blockbits = PAGE_SHIFT; /* inode->i_blkbits */
23 struct iov_iter to;
24 struct bio_vec bv = {.bv_page = page, .bv_len = PAGE_SIZE};
25
26 iov_iter_bvec(&to, ITER_BVEC | READ, &bv, 1, PAGE_SIZE);
27
28 gossip_debug(GOSSIP_INODE_DEBUG,
29 "orangefs_readpage called with page %p\n",
30 page);
31
32 max_block = ((inode->i_size / blocksize) + 1);
33
34 if (page->index < max_block) {
35 loff_t blockptr_offset = (((loff_t) page->index) << blockbits);
36
37 bytes_read = orangefs_inode_read(inode,
38 &to,
39 &blockptr_offset,
40 inode->i_size);
41 }
42 /* this will only zero remaining unread portions of the page data */
43 iov_iter_zero(~0U, &to);
44 /* takes care of potential aliasing */
45 flush_dcache_page(page);
46 if (bytes_read < 0) {
47 ret = bytes_read;
48 SetPageError(page);
49 } else {
50 SetPageUptodate(page);
51 if (PageError(page))
52 ClearPageError(page);
53 ret = 0;
54 }
55 /* unlock the page after the ->readpage() routine completes */
56 unlock_page(page);
57 return ret;
58}
59
60static int orangefs_readpage(struct file *file, struct page *page)
61{
62 return read_one_page(page);
63}
64
65static int orangefs_readpages(struct file *file,
66 struct address_space *mapping,
67 struct list_head *pages,
68 unsigned nr_pages)
69{
70 int page_idx;
71 int ret;
72
73 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_readpages called\n");
74
75 for (page_idx = 0; page_idx < nr_pages; page_idx++) {
76 struct page *page;
77
78 page = list_entry(pages->prev, struct page, lru);
79 list_del(&page->lru);
80 if (!add_to_page_cache(page,
81 mapping,
82 page->index,
83 GFP_KERNEL)) {
84 ret = read_one_page(page);
85 gossip_debug(GOSSIP_INODE_DEBUG,
86 "failure adding page to cache, read_one_page returned: %d\n",
87 ret);
88 } else {
89 put_page(page);
90 }
91 }
92 BUG_ON(!list_empty(pages));
93 return 0;
94}
95
96static void orangefs_invalidatepage(struct page *page,
97 unsigned int offset,
98 unsigned int length)
99{
100 gossip_debug(GOSSIP_INODE_DEBUG,
101 "orangefs_invalidatepage called on page %p "
102 "(offset is %u)\n",
103 page,
104 offset);
105
106 ClearPageUptodate(page);
107 ClearPageMappedToDisk(page);
108 return;
109
110}
111
112static int orangefs_releasepage(struct page *page, gfp_t foo)
113{
114 gossip_debug(GOSSIP_INODE_DEBUG,
115 "orangefs_releasepage called on page %p\n",
116 page);
117 return 0;
118}
119
120/*
121 * Having a direct_IO entry point in the address_space_operations
122 * struct causes the kernel to allows us to use O_DIRECT on
123 * open. Nothing will ever call this thing, but in the future we
124 * will need to be able to use O_DIRECT on open in order to support
125 * AIO. Modeled after NFS, they do this too.
126 */
127/*
128 * static ssize_t orangefs_direct_IO(int rw,
129 * struct kiocb *iocb,
130 * struct iov_iter *iter,
131 * loff_t offset)
132 *{
133 * gossip_debug(GOSSIP_INODE_DEBUG,
134 * "orangefs_direct_IO: %s\n",
135 * iocb->ki_filp->f_path.dentry->d_name.name);
136 *
137 * return -EINVAL;
138 *}
139 */
140
141struct backing_dev_info orangefs_backing_dev_info = {
142 .name = "orangefs",
143 .ra_pages = 0,
144 .capabilities = BDI_CAP_NO_ACCT_DIRTY | BDI_CAP_NO_WRITEBACK,
145};
146
147/** ORANGEFS2 implementation of address space operations */
148const struct address_space_operations orangefs_address_operations = {
149 .readpage = orangefs_readpage,
150 .readpages = orangefs_readpages,
151 .invalidatepage = orangefs_invalidatepage,
152 .releasepage = orangefs_releasepage,
153/* .direct_IO = orangefs_direct_IO */
154};
155
156static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
157{
158 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
159 struct orangefs_kernel_op_s *new_op;
160 loff_t orig_size;
161 int ret = -EINVAL;
162
163 gossip_debug(GOSSIP_INODE_DEBUG,
164 "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n",
165 __func__,
166 get_khandle_from_ino(inode),
167 &orangefs_inode->refn.khandle,
168 orangefs_inode->refn.fs_id,
169 iattr->ia_size);
170
171 /* Ensure that we have a up to date size, so we know if it changed. */
172 ret = orangefs_inode_getattr(inode, 0, 1);
173 if (ret == -ESTALE)
174 ret = -EIO;
175 if (ret) {
176 gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
177 __func__, ret);
178 return ret;
179 }
180 orig_size = i_size_read(inode);
181
182 truncate_setsize(inode, iattr->ia_size);
183
184 new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE);
185 if (!new_op)
186 return -ENOMEM;
187
188 new_op->upcall.req.truncate.refn = orangefs_inode->refn;
189 new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;
190
191 ret = service_operation(new_op, __func__,
192 get_interruptible_flag(inode));
193
194 /*
195 * the truncate has no downcall members to retrieve, but
196 * the status value tells us if it went through ok or not
197 */
198 gossip_debug(GOSSIP_INODE_DEBUG,
199 "orangefs: orangefs_truncate got return value of %d\n",
200 ret);
201
202 op_release(new_op);
203
204 if (ret != 0)
205 return ret;
206
207 if (orig_size != i_size_read(inode))
208 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
209
210 return ret;
211}
212
213/*
214 * Change attributes of an object referenced by dentry.
215 */
216int orangefs_setattr(struct dentry *dentry, struct iattr *iattr)
217{
218 int ret = -EINVAL;
219 struct inode *inode = dentry->d_inode;
220
221 gossip_debug(GOSSIP_INODE_DEBUG,
222 "orangefs_setattr: called on %s\n",
223 dentry->d_name.name);
224
225 ret = inode_change_ok(inode, iattr);
226 if (ret)
227 goto out;
228
229 if ((iattr->ia_valid & ATTR_SIZE) &&
230 iattr->ia_size != i_size_read(inode)) {
231 ret = orangefs_setattr_size(inode, iattr);
232 if (ret)
233 goto out;
234 }
235
236 setattr_copy(inode, iattr);
237 mark_inode_dirty(inode);
238
239 ret = orangefs_inode_setattr(inode, iattr);
240 gossip_debug(GOSSIP_INODE_DEBUG,
241 "orangefs_setattr: inode_setattr returned %d\n",
242 ret);
243
244 if (!ret && (iattr->ia_valid & ATTR_MODE))
245 /* change mod on a file that has ACLs */
246 ret = posix_acl_chmod(inode, inode->i_mode);
247
248out:
249 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n", ret);
250 return ret;
251}
252
253/*
254 * Obtain attributes of an object given a dentry
255 */
256int orangefs_getattr(struct vfsmount *mnt,
257 struct dentry *dentry,
258 struct kstat *kstat)
259{
260 int ret = -ENOENT;
261 struct inode *inode = dentry->d_inode;
262 struct orangefs_inode_s *orangefs_inode = NULL;
263
264 gossip_debug(GOSSIP_INODE_DEBUG,
265 "orangefs_getattr: called on %s\n",
266 dentry->d_name.name);
267
268 ret = orangefs_inode_getattr(inode, 0, 1);
269 if (ret == 0) {
270 generic_fillattr(inode, kstat);
271
272 /* override block size reported to stat */
273 orangefs_inode = ORANGEFS_I(inode);
274 kstat->blksize = orangefs_inode->blksize;
275 }
276 return ret;
277}
278
279int orangefs_permission(struct inode *inode, int mask)
280{
281 int ret;
282
283 if (mask & MAY_NOT_BLOCK)
284 return -ECHILD;
285
286 gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
287
288 /* Make sure the permission (and other common attrs) are up to date. */
289 ret = orangefs_inode_getattr(inode, 0, 0);
290 if (ret < 0)
291 return ret;
292
293 return generic_permission(inode, mask);
294}
295
296/* ORANGEDS2 implementation of VFS inode operations for files */
297struct inode_operations orangefs_file_inode_operations = {
298 .get_acl = orangefs_get_acl,
299 .set_acl = orangefs_set_acl,
300 .setattr = orangefs_setattr,
301 .getattr = orangefs_getattr,
302 .setxattr = generic_setxattr,
303 .getxattr = generic_getxattr,
304 .listxattr = orangefs_listxattr,
305 .removexattr = generic_removexattr,
306 .permission = orangefs_permission,
307};
308
309static int orangefs_init_iops(struct inode *inode)
310{
311 inode->i_mapping->a_ops = &orangefs_address_operations;
312
313 switch (inode->i_mode & S_IFMT) {
314 case S_IFREG:
315 inode->i_op = &orangefs_file_inode_operations;
316 inode->i_fop = &orangefs_file_operations;
317 inode->i_blkbits = PAGE_SHIFT;
318 break;
319 case S_IFLNK:
320 inode->i_op = &orangefs_symlink_inode_operations;
321 break;
322 case S_IFDIR:
323 inode->i_op = &orangefs_dir_inode_operations;
324 inode->i_fop = &orangefs_dir_operations;
325 break;
326 default:
327 gossip_debug(GOSSIP_INODE_DEBUG,
328 "%s: unsupported mode\n",
329 __func__);
330 return -EINVAL;
331 }
332
333 return 0;
334}
335
336/*
337 * Given a ORANGEFS object identifier (fsid, handle), convert it into a ino_t type
338 * that will be used as a hash-index from where the handle will
339 * be searched for in the VFS hash table of inodes.
340 */
341static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
342{
343 if (!ref)
344 return 0;
345 return orangefs_khandle_to_ino(&(ref->khandle));
346}
347
348/*
349 * Called to set up an inode from iget5_locked.
350 */
351static int orangefs_set_inode(struct inode *inode, void *data)
352{
353 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
354 ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
355 ORANGEFS_I(inode)->refn.khandle = ref->khandle;
356 return 0;
357}
358
359/*
360 * Called to determine if handles match.
361 */
362static int orangefs_test_inode(struct inode *inode, void *data)
363{
364 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
365 struct orangefs_inode_s *orangefs_inode = NULL;
366
367 orangefs_inode = ORANGEFS_I(inode);
368 return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle), &(ref->khandle))
369 && orangefs_inode->refn.fs_id == ref->fs_id);
370}
371
372/*
373 * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
374 * file handle.
375 *
376 * @sb: the file system super block instance.
377 * @ref: The ORANGEFS object for which we are trying to locate an inode structure.
378 */
379struct inode *orangefs_iget(struct super_block *sb, struct orangefs_object_kref *ref)
380{
381 struct inode *inode = NULL;
382 unsigned long hash;
383 int error;
384
385 hash = orangefs_handle_hash(ref);
386 inode = iget5_locked(sb, hash, orangefs_test_inode, orangefs_set_inode, ref);
387 if (!inode || !(inode->i_state & I_NEW))
388 return inode;
389
390 error = orangefs_inode_getattr(inode, 1, 0);
391 if (error) {
392 iget_failed(inode);
393 return ERR_PTR(error);
394 }
395
396 inode->i_ino = hash; /* needed for stat etc */
397 orangefs_init_iops(inode);
398 unlock_new_inode(inode);
399
400 gossip_debug(GOSSIP_INODE_DEBUG,
401 "iget handle %pU, fsid %d hash %ld i_ino %lu\n",
402 &ref->khandle,
403 ref->fs_id,
404 hash,
405 inode->i_ino);
406
407 return inode;
408}
409
410/*
411 * Allocate an inode for a newly created file and insert it into the inode hash.
412 */
413struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir,
414 int mode, dev_t dev, struct orangefs_object_kref *ref)
415{
416 unsigned long hash = orangefs_handle_hash(ref);
417 struct inode *inode;
418 int error;
419
420 gossip_debug(GOSSIP_INODE_DEBUG,
421 "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n",
422 __func__,
423 sb,
424 MAJOR(dev),
425 MINOR(dev),
426 mode);
427
428 inode = new_inode(sb);
429 if (!inode)
430 return NULL;
431
432 orangefs_set_inode(inode, ref);
433 inode->i_ino = hash; /* needed for stat etc */
434
435 error = orangefs_inode_getattr(inode, 1, 0);
436 if (error)
437 goto out_iput;
438
439 orangefs_init_iops(inode);
440
441 inode->i_mode = mode;
442 inode->i_uid = current_fsuid();
443 inode->i_gid = current_fsgid();
444 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
445 inode->i_size = PAGE_SIZE;
446 inode->i_rdev = dev;
447
448 error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
449 if (error < 0)
450 goto out_iput;
451
452 gossip_debug(GOSSIP_INODE_DEBUG,
453 "Initializing ACL's for inode %pU\n",
454 get_khandle_from_ino(inode));
455 orangefs_init_acl(inode, dir);
456 return inode;
457
458out_iput:
459 iput(inode);
460 return ERR_PTR(error);
461}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * (C) 2001 Clemson University and The University of Chicago
4 * Copyright 2018 Omnibond Systems, L.L.C.
5 *
6 * See COPYING in top-level directory.
7 */
8
9/*
10 * Linux VFS inode operations.
11 */
12
13#include <linux/bvec.h>
14#include "protocol.h"
15#include "orangefs-kernel.h"
16#include "orangefs-bufmap.h"
17
18static int orangefs_writepage_locked(struct page *page,
19 struct writeback_control *wbc)
20{
21 struct inode *inode = page->mapping->host;
22 struct orangefs_write_range *wr = NULL;
23 struct iov_iter iter;
24 struct bio_vec bv;
25 size_t len, wlen;
26 ssize_t ret;
27 loff_t off;
28
29 set_page_writeback(page);
30
31 len = i_size_read(inode);
32 if (PagePrivate(page)) {
33 wr = (struct orangefs_write_range *)page_private(page);
34 WARN_ON(wr->pos >= len);
35 off = wr->pos;
36 if (off + wr->len > len)
37 wlen = len - off;
38 else
39 wlen = wr->len;
40 } else {
41 WARN_ON(1);
42 off = page_offset(page);
43 if (off + PAGE_SIZE > len)
44 wlen = len - off;
45 else
46 wlen = PAGE_SIZE;
47 }
48 /* Should've been handled in orangefs_invalidatepage. */
49 WARN_ON(off == len || off + wlen > len);
50
51 bv.bv_page = page;
52 bv.bv_len = wlen;
53 bv.bv_offset = off % PAGE_SIZE;
54 WARN_ON(wlen == 0);
55 iov_iter_bvec(&iter, WRITE, &bv, 1, wlen);
56
57 ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, wlen,
58 len, wr, NULL, NULL);
59 if (ret < 0) {
60 SetPageError(page);
61 mapping_set_error(page->mapping, ret);
62 } else {
63 ret = 0;
64 }
65 kfree(detach_page_private(page));
66 return ret;
67}
68
69static int orangefs_writepage(struct page *page, struct writeback_control *wbc)
70{
71 int ret;
72 ret = orangefs_writepage_locked(page, wbc);
73 unlock_page(page);
74 end_page_writeback(page);
75 return ret;
76}
77
78struct orangefs_writepages {
79 loff_t off;
80 size_t len;
81 kuid_t uid;
82 kgid_t gid;
83 int maxpages;
84 int npages;
85 struct page **pages;
86 struct bio_vec *bv;
87};
88
89static int orangefs_writepages_work(struct orangefs_writepages *ow,
90 struct writeback_control *wbc)
91{
92 struct inode *inode = ow->pages[0]->mapping->host;
93 struct orangefs_write_range *wrp, wr;
94 struct iov_iter iter;
95 ssize_t ret;
96 size_t len;
97 loff_t off;
98 int i;
99
100 len = i_size_read(inode);
101
102 for (i = 0; i < ow->npages; i++) {
103 set_page_writeback(ow->pages[i]);
104 ow->bv[i].bv_page = ow->pages[i];
105 ow->bv[i].bv_len = min(page_offset(ow->pages[i]) + PAGE_SIZE,
106 ow->off + ow->len) -
107 max(ow->off, page_offset(ow->pages[i]));
108 if (i == 0)
109 ow->bv[i].bv_offset = ow->off -
110 page_offset(ow->pages[i]);
111 else
112 ow->bv[i].bv_offset = 0;
113 }
114 iov_iter_bvec(&iter, WRITE, ow->bv, ow->npages, ow->len);
115
116 WARN_ON(ow->off >= len);
117 if (ow->off + ow->len > len)
118 ow->len = len - ow->off;
119
120 off = ow->off;
121 wr.uid = ow->uid;
122 wr.gid = ow->gid;
123 ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, ow->len,
124 0, &wr, NULL, NULL);
125 if (ret < 0) {
126 for (i = 0; i < ow->npages; i++) {
127 SetPageError(ow->pages[i]);
128 mapping_set_error(ow->pages[i]->mapping, ret);
129 if (PagePrivate(ow->pages[i])) {
130 wrp = (struct orangefs_write_range *)
131 page_private(ow->pages[i]);
132 ClearPagePrivate(ow->pages[i]);
133 put_page(ow->pages[i]);
134 kfree(wrp);
135 }
136 end_page_writeback(ow->pages[i]);
137 unlock_page(ow->pages[i]);
138 }
139 } else {
140 ret = 0;
141 for (i = 0; i < ow->npages; i++) {
142 if (PagePrivate(ow->pages[i])) {
143 wrp = (struct orangefs_write_range *)
144 page_private(ow->pages[i]);
145 ClearPagePrivate(ow->pages[i]);
146 put_page(ow->pages[i]);
147 kfree(wrp);
148 }
149 end_page_writeback(ow->pages[i]);
150 unlock_page(ow->pages[i]);
151 }
152 }
153 return ret;
154}
155
156static int orangefs_writepages_callback(struct page *page,
157 struct writeback_control *wbc, void *data)
158{
159 struct orangefs_writepages *ow = data;
160 struct orangefs_write_range *wr;
161 int ret;
162
163 if (!PagePrivate(page)) {
164 unlock_page(page);
165 /* It's not private so there's nothing to write, right? */
166 printk("writepages_callback not private!\n");
167 BUG();
168 return 0;
169 }
170 wr = (struct orangefs_write_range *)page_private(page);
171
172 ret = -1;
173 if (ow->npages == 0) {
174 ow->off = wr->pos;
175 ow->len = wr->len;
176 ow->uid = wr->uid;
177 ow->gid = wr->gid;
178 ow->pages[ow->npages++] = page;
179 ret = 0;
180 goto done;
181 }
182 if (!uid_eq(ow->uid, wr->uid) || !gid_eq(ow->gid, wr->gid)) {
183 orangefs_writepages_work(ow, wbc);
184 ow->npages = 0;
185 ret = -1;
186 goto done;
187 }
188 if (ow->off + ow->len == wr->pos) {
189 ow->len += wr->len;
190 ow->pages[ow->npages++] = page;
191 ret = 0;
192 goto done;
193 }
194done:
195 if (ret == -1) {
196 if (ow->npages) {
197 orangefs_writepages_work(ow, wbc);
198 ow->npages = 0;
199 }
200 ret = orangefs_writepage_locked(page, wbc);
201 mapping_set_error(page->mapping, ret);
202 unlock_page(page);
203 end_page_writeback(page);
204 } else {
205 if (ow->npages == ow->maxpages) {
206 orangefs_writepages_work(ow, wbc);
207 ow->npages = 0;
208 }
209 }
210 return ret;
211}
212
213static int orangefs_writepages(struct address_space *mapping,
214 struct writeback_control *wbc)
215{
216 struct orangefs_writepages *ow;
217 struct blk_plug plug;
218 int ret;
219 ow = kzalloc(sizeof(struct orangefs_writepages), GFP_KERNEL);
220 if (!ow)
221 return -ENOMEM;
222 ow->maxpages = orangefs_bufmap_size_query()/PAGE_SIZE;
223 ow->pages = kcalloc(ow->maxpages, sizeof(struct page *), GFP_KERNEL);
224 if (!ow->pages) {
225 kfree(ow);
226 return -ENOMEM;
227 }
228 ow->bv = kcalloc(ow->maxpages, sizeof(struct bio_vec), GFP_KERNEL);
229 if (!ow->bv) {
230 kfree(ow->pages);
231 kfree(ow);
232 return -ENOMEM;
233 }
234 blk_start_plug(&plug);
235 ret = write_cache_pages(mapping, wbc, orangefs_writepages_callback, ow);
236 if (ow->npages)
237 ret = orangefs_writepages_work(ow, wbc);
238 blk_finish_plug(&plug);
239 kfree(ow->pages);
240 kfree(ow->bv);
241 kfree(ow);
242 return ret;
243}
244
245static int orangefs_launder_page(struct page *);
246
247static int orangefs_readpage(struct file *file, struct page *page)
248{
249 struct inode *inode = page->mapping->host;
250 struct iov_iter iter;
251 struct bio_vec bv;
252 ssize_t ret;
253 loff_t off; /* offset into this page */
254 pgoff_t index; /* which page */
255 struct page *next_page;
256 char *kaddr;
257 loff_t read_size;
258 int buffer_index = -1; /* orangefs shared memory slot */
259 int slot_index; /* index into slot */
260 int remaining;
261
262 /*
263 * Get up to this many bytes from Orangefs at a time and try
264 * to fill them into the page cache at once. Tests with dd made
265 * this seem like a reasonable static number, if there was
266 * interest perhaps this number could be made setable through
267 * sysfs...
268 */
269 read_size = 524288;
270
271 if (PageDirty(page))
272 orangefs_launder_page(page);
273
274 off = page_offset(page);
275 index = off >> PAGE_SHIFT;
276 bv.bv_page = page;
277 bv.bv_len = PAGE_SIZE;
278 bv.bv_offset = 0;
279 iov_iter_bvec(&iter, READ, &bv, 1, PAGE_SIZE);
280
281 ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, &off, &iter,
282 read_size, inode->i_size, NULL, &buffer_index, file);
283 remaining = ret;
284 /* this will only zero remaining unread portions of the page data */
285 iov_iter_zero(~0U, &iter);
286 /* takes care of potential aliasing */
287 flush_dcache_page(page);
288 if (ret < 0) {
289 SetPageError(page);
290 unlock_page(page);
291 goto out;
292 } else {
293 SetPageUptodate(page);
294 if (PageError(page))
295 ClearPageError(page);
296 ret = 0;
297 }
298 /* unlock the page after the ->readpage() routine completes */
299 unlock_page(page);
300
301 if (remaining > PAGE_SIZE) {
302 slot_index = 0;
303 while ((remaining - PAGE_SIZE) >= PAGE_SIZE) {
304 remaining -= PAGE_SIZE;
305 /*
306 * It is an optimization to try and fill more than one
307 * page... by now we've already gotten the single
308 * page we were after, if stuff doesn't seem to
309 * be going our way at this point just return
310 * and hope for the best.
311 *
312 * If we look for pages and they're already there is
313 * one reason to give up, and if they're not there
314 * and we can't create them is another reason.
315 */
316
317 index++;
318 slot_index++;
319 next_page = find_get_page(inode->i_mapping, index);
320 if (next_page) {
321 gossip_debug(GOSSIP_FILE_DEBUG,
322 "%s: found next page, quitting\n",
323 __func__);
324 put_page(next_page);
325 goto out;
326 }
327 next_page = find_or_create_page(inode->i_mapping,
328 index,
329 GFP_KERNEL);
330 /*
331 * I've never hit this, leave it as a printk for
332 * now so it will be obvious.
333 */
334 if (!next_page) {
335 printk("%s: can't create next page, quitting\n",
336 __func__);
337 goto out;
338 }
339 kaddr = kmap_atomic(next_page);
340 orangefs_bufmap_page_fill(kaddr,
341 buffer_index,
342 slot_index);
343 kunmap_atomic(kaddr);
344 SetPageUptodate(next_page);
345 unlock_page(next_page);
346 put_page(next_page);
347 }
348 }
349
350out:
351 if (buffer_index != -1)
352 orangefs_bufmap_put(buffer_index);
353 return ret;
354}
355
356static int orangefs_write_begin(struct file *file,
357 struct address_space *mapping,
358 loff_t pos, unsigned len, unsigned flags, struct page **pagep,
359 void **fsdata)
360{
361 struct orangefs_write_range *wr;
362 struct page *page;
363 pgoff_t index;
364 int ret;
365
366 index = pos >> PAGE_SHIFT;
367
368 page = grab_cache_page_write_begin(mapping, index, flags);
369 if (!page)
370 return -ENOMEM;
371
372 *pagep = page;
373
374 if (PageDirty(page) && !PagePrivate(page)) {
375 /*
376 * Should be impossible. If it happens, launder the page
377 * since we don't know what's dirty. This will WARN in
378 * orangefs_writepage_locked.
379 */
380 ret = orangefs_launder_page(page);
381 if (ret)
382 return ret;
383 }
384 if (PagePrivate(page)) {
385 struct orangefs_write_range *wr;
386 wr = (struct orangefs_write_range *)page_private(page);
387 if (wr->pos + wr->len == pos &&
388 uid_eq(wr->uid, current_fsuid()) &&
389 gid_eq(wr->gid, current_fsgid())) {
390 wr->len += len;
391 goto okay;
392 } else {
393 ret = orangefs_launder_page(page);
394 if (ret)
395 return ret;
396 }
397 }
398
399 wr = kmalloc(sizeof *wr, GFP_KERNEL);
400 if (!wr)
401 return -ENOMEM;
402
403 wr->pos = pos;
404 wr->len = len;
405 wr->uid = current_fsuid();
406 wr->gid = current_fsgid();
407 attach_page_private(page, wr);
408okay:
409 return 0;
410}
411
412static int orangefs_write_end(struct file *file, struct address_space *mapping,
413 loff_t pos, unsigned len, unsigned copied, struct page *page, void *fsdata)
414{
415 struct inode *inode = page->mapping->host;
416 loff_t last_pos = pos + copied;
417
418 /*
419 * No need to use i_size_read() here, the i_size
420 * cannot change under us because we hold the i_mutex.
421 */
422 if (last_pos > inode->i_size)
423 i_size_write(inode, last_pos);
424
425 /* zero the stale part of the page if we did a short copy */
426 if (!PageUptodate(page)) {
427 unsigned from = pos & (PAGE_SIZE - 1);
428 if (copied < len) {
429 zero_user(page, from + copied, len - copied);
430 }
431 /* Set fully written pages uptodate. */
432 if (pos == page_offset(page) &&
433 (len == PAGE_SIZE || pos + len == inode->i_size)) {
434 zero_user_segment(page, from + copied, PAGE_SIZE);
435 SetPageUptodate(page);
436 }
437 }
438
439 set_page_dirty(page);
440 unlock_page(page);
441 put_page(page);
442
443 mark_inode_dirty_sync(file_inode(file));
444 return copied;
445}
446
447static void orangefs_invalidatepage(struct page *page,
448 unsigned int offset,
449 unsigned int length)
450{
451 struct orangefs_write_range *wr;
452 wr = (struct orangefs_write_range *)page_private(page);
453
454 if (offset == 0 && length == PAGE_SIZE) {
455 kfree(detach_page_private(page));
456 return;
457 /* write range entirely within invalidate range (or equal) */
458 } else if (page_offset(page) + offset <= wr->pos &&
459 wr->pos + wr->len <= page_offset(page) + offset + length) {
460 kfree(detach_page_private(page));
461 /* XXX is this right? only caller in fs */
462 cancel_dirty_page(page);
463 return;
464 /* invalidate range chops off end of write range */
465 } else if (wr->pos < page_offset(page) + offset &&
466 wr->pos + wr->len <= page_offset(page) + offset + length &&
467 page_offset(page) + offset < wr->pos + wr->len) {
468 size_t x;
469 x = wr->pos + wr->len - (page_offset(page) + offset);
470 WARN_ON(x > wr->len);
471 wr->len -= x;
472 wr->uid = current_fsuid();
473 wr->gid = current_fsgid();
474 /* invalidate range chops off beginning of write range */
475 } else if (page_offset(page) + offset <= wr->pos &&
476 page_offset(page) + offset + length < wr->pos + wr->len &&
477 wr->pos < page_offset(page) + offset + length) {
478 size_t x;
479 x = page_offset(page) + offset + length - wr->pos;
480 WARN_ON(x > wr->len);
481 wr->pos += x;
482 wr->len -= x;
483 wr->uid = current_fsuid();
484 wr->gid = current_fsgid();
485 /* invalidate range entirely within write range (punch hole) */
486 } else if (wr->pos < page_offset(page) + offset &&
487 page_offset(page) + offset + length < wr->pos + wr->len) {
488 /* XXX what do we do here... should not WARN_ON */
489 WARN_ON(1);
490 /* punch hole */
491 /*
492 * should we just ignore this and write it out anyway?
493 * it hardly makes sense
494 */
495 return;
496 /* non-overlapping ranges */
497 } else {
498 /* WARN if they do overlap */
499 if (!((page_offset(page) + offset + length <= wr->pos) ^
500 (wr->pos + wr->len <= page_offset(page) + offset))) {
501 WARN_ON(1);
502 printk("invalidate range offset %llu length %u\n",
503 page_offset(page) + offset, length);
504 printk("write range offset %llu length %zu\n",
505 wr->pos, wr->len);
506 }
507 return;
508 }
509
510 /*
511 * Above there are returns where wr is freed or where we WARN.
512 * Thus the following runs if wr was modified above.
513 */
514
515 orangefs_launder_page(page);
516}
517
518static int orangefs_releasepage(struct page *page, gfp_t foo)
519{
520 return !PagePrivate(page);
521}
522
523static void orangefs_freepage(struct page *page)
524{
525 kfree(detach_page_private(page));
526}
527
528static int orangefs_launder_page(struct page *page)
529{
530 int r = 0;
531 struct writeback_control wbc = {
532 .sync_mode = WB_SYNC_ALL,
533 .nr_to_write = 0,
534 };
535 wait_on_page_writeback(page);
536 if (clear_page_dirty_for_io(page)) {
537 r = orangefs_writepage_locked(page, &wbc);
538 end_page_writeback(page);
539 }
540 return r;
541}
542
543static ssize_t orangefs_direct_IO(struct kiocb *iocb,
544 struct iov_iter *iter)
545{
546 /*
547 * Comment from original do_readv_writev:
548 * Common entry point for read/write/readv/writev
549 * This function will dispatch it to either the direct I/O
550 * or buffered I/O path depending on the mount options and/or
551 * augmented/extended metadata attached to the file.
552 * Note: File extended attributes override any mount options.
553 */
554 struct file *file = iocb->ki_filp;
555 loff_t pos = iocb->ki_pos;
556 enum ORANGEFS_io_type type = iov_iter_rw(iter) == WRITE ?
557 ORANGEFS_IO_WRITE : ORANGEFS_IO_READ;
558 loff_t *offset = &pos;
559 struct inode *inode = file->f_mapping->host;
560 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
561 struct orangefs_khandle *handle = &orangefs_inode->refn.khandle;
562 size_t count = iov_iter_count(iter);
563 ssize_t total_count = 0;
564 ssize_t ret = -EINVAL;
565 int i = 0;
566
567 gossip_debug(GOSSIP_FILE_DEBUG,
568 "%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n",
569 __func__,
570 handle,
571 (int)count);
572
573 if (type == ORANGEFS_IO_WRITE) {
574 gossip_debug(GOSSIP_FILE_DEBUG,
575 "%s(%pU): proceeding with offset : %llu, "
576 "size %d\n",
577 __func__,
578 handle,
579 llu(*offset),
580 (int)count);
581 }
582
583 if (count == 0) {
584 ret = 0;
585 goto out;
586 }
587
588 while (iov_iter_count(iter)) {
589 size_t each_count = iov_iter_count(iter);
590 size_t amt_complete;
591 i++;
592
593 /* how much to transfer in this loop iteration */
594 if (each_count > orangefs_bufmap_size_query())
595 each_count = orangefs_bufmap_size_query();
596
597 gossip_debug(GOSSIP_FILE_DEBUG,
598 "%s(%pU): size of each_count(%d)\n",
599 __func__,
600 handle,
601 (int)each_count);
602 gossip_debug(GOSSIP_FILE_DEBUG,
603 "%s(%pU): BEFORE wait_for_io: offset is %d\n",
604 __func__,
605 handle,
606 (int)*offset);
607
608 ret = wait_for_direct_io(type, inode, offset, iter,
609 each_count, 0, NULL, NULL, file);
610 gossip_debug(GOSSIP_FILE_DEBUG,
611 "%s(%pU): return from wait_for_io:%d\n",
612 __func__,
613 handle,
614 (int)ret);
615
616 if (ret < 0)
617 goto out;
618
619 *offset += ret;
620 total_count += ret;
621 amt_complete = ret;
622
623 gossip_debug(GOSSIP_FILE_DEBUG,
624 "%s(%pU): AFTER wait_for_io: offset is %d\n",
625 __func__,
626 handle,
627 (int)*offset);
628
629 /*
630 * if we got a short I/O operations,
631 * fall out and return what we got so far
632 */
633 if (amt_complete < each_count)
634 break;
635 } /*end while */
636
637out:
638 if (total_count > 0)
639 ret = total_count;
640 if (ret > 0) {
641 if (type == ORANGEFS_IO_READ) {
642 file_accessed(file);
643 } else {
644 file_update_time(file);
645 if (*offset > i_size_read(inode))
646 i_size_write(inode, *offset);
647 }
648 }
649
650 gossip_debug(GOSSIP_FILE_DEBUG,
651 "%s(%pU): Value(%d) returned.\n",
652 __func__,
653 handle,
654 (int)ret);
655
656 return ret;
657}
658
659/** ORANGEFS2 implementation of address space operations */
660static const struct address_space_operations orangefs_address_operations = {
661 .writepage = orangefs_writepage,
662 .readpage = orangefs_readpage,
663 .writepages = orangefs_writepages,
664 .set_page_dirty = __set_page_dirty_nobuffers,
665 .write_begin = orangefs_write_begin,
666 .write_end = orangefs_write_end,
667 .invalidatepage = orangefs_invalidatepage,
668 .releasepage = orangefs_releasepage,
669 .freepage = orangefs_freepage,
670 .launder_page = orangefs_launder_page,
671 .direct_IO = orangefs_direct_IO,
672};
673
674vm_fault_t orangefs_page_mkwrite(struct vm_fault *vmf)
675{
676 struct page *page = vmf->page;
677 struct inode *inode = file_inode(vmf->vma->vm_file);
678 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
679 unsigned long *bitlock = &orangefs_inode->bitlock;
680 vm_fault_t ret;
681 struct orangefs_write_range *wr;
682
683 sb_start_pagefault(inode->i_sb);
684
685 if (wait_on_bit(bitlock, 1, TASK_KILLABLE)) {
686 ret = VM_FAULT_RETRY;
687 goto out;
688 }
689
690 lock_page(page);
691 if (PageDirty(page) && !PagePrivate(page)) {
692 /*
693 * Should be impossible. If it happens, launder the page
694 * since we don't know what's dirty. This will WARN in
695 * orangefs_writepage_locked.
696 */
697 if (orangefs_launder_page(page)) {
698 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
699 goto out;
700 }
701 }
702 if (PagePrivate(page)) {
703 wr = (struct orangefs_write_range *)page_private(page);
704 if (uid_eq(wr->uid, current_fsuid()) &&
705 gid_eq(wr->gid, current_fsgid())) {
706 wr->pos = page_offset(page);
707 wr->len = PAGE_SIZE;
708 goto okay;
709 } else {
710 if (orangefs_launder_page(page)) {
711 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
712 goto out;
713 }
714 }
715 }
716 wr = kmalloc(sizeof *wr, GFP_KERNEL);
717 if (!wr) {
718 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
719 goto out;
720 }
721 wr->pos = page_offset(page);
722 wr->len = PAGE_SIZE;
723 wr->uid = current_fsuid();
724 wr->gid = current_fsgid();
725 attach_page_private(page, wr);
726okay:
727
728 file_update_time(vmf->vma->vm_file);
729 if (page->mapping != inode->i_mapping) {
730 unlock_page(page);
731 ret = VM_FAULT_LOCKED|VM_FAULT_NOPAGE;
732 goto out;
733 }
734
735 /*
736 * We mark the page dirty already here so that when freeze is in
737 * progress, we are guaranteed that writeback during freezing will
738 * see the dirty page and writeprotect it again.
739 */
740 set_page_dirty(page);
741 wait_for_stable_page(page);
742 ret = VM_FAULT_LOCKED;
743out:
744 sb_end_pagefault(inode->i_sb);
745 return ret;
746}
747
748static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
749{
750 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
751 struct orangefs_kernel_op_s *new_op;
752 loff_t orig_size;
753 int ret = -EINVAL;
754
755 gossip_debug(GOSSIP_INODE_DEBUG,
756 "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n",
757 __func__,
758 get_khandle_from_ino(inode),
759 &orangefs_inode->refn.khandle,
760 orangefs_inode->refn.fs_id,
761 iattr->ia_size);
762
763 /* Ensure that we have a up to date size, so we know if it changed. */
764 ret = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_SIZE);
765 if (ret == -ESTALE)
766 ret = -EIO;
767 if (ret) {
768 gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
769 __func__, ret);
770 return ret;
771 }
772 orig_size = i_size_read(inode);
773
774 /* This is truncate_setsize in a different order. */
775 truncate_pagecache(inode, iattr->ia_size);
776 i_size_write(inode, iattr->ia_size);
777 if (iattr->ia_size > orig_size)
778 pagecache_isize_extended(inode, orig_size, iattr->ia_size);
779
780 new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE);
781 if (!new_op)
782 return -ENOMEM;
783
784 new_op->upcall.req.truncate.refn = orangefs_inode->refn;
785 new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;
786
787 ret = service_operation(new_op,
788 __func__,
789 get_interruptible_flag(inode));
790
791 /*
792 * the truncate has no downcall members to retrieve, but
793 * the status value tells us if it went through ok or not
794 */
795 gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret);
796
797 op_release(new_op);
798
799 if (ret != 0)
800 return ret;
801
802 if (orig_size != i_size_read(inode))
803 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
804
805 return ret;
806}
807
808int __orangefs_setattr(struct inode *inode, struct iattr *iattr)
809{
810 int ret;
811
812 if (iattr->ia_valid & ATTR_MODE) {
813 if (iattr->ia_mode & (S_ISVTX)) {
814 if (is_root_handle(inode)) {
815 /*
816 * allow sticky bit to be set on root (since
817 * it shows up that way by default anyhow),
818 * but don't show it to the server
819 */
820 iattr->ia_mode -= S_ISVTX;
821 } else {
822 gossip_debug(GOSSIP_UTILS_DEBUG,
823 "User attempted to set sticky bit on non-root directory; returning EINVAL.\n");
824 ret = -EINVAL;
825 goto out;
826 }
827 }
828 if (iattr->ia_mode & (S_ISUID)) {
829 gossip_debug(GOSSIP_UTILS_DEBUG,
830 "Attempting to set setuid bit (not supported); returning EINVAL.\n");
831 ret = -EINVAL;
832 goto out;
833 }
834 }
835
836 if (iattr->ia_valid & ATTR_SIZE) {
837 ret = orangefs_setattr_size(inode, iattr);
838 if (ret)
839 goto out;
840 }
841
842again:
843 spin_lock(&inode->i_lock);
844 if (ORANGEFS_I(inode)->attr_valid) {
845 if (uid_eq(ORANGEFS_I(inode)->attr_uid, current_fsuid()) &&
846 gid_eq(ORANGEFS_I(inode)->attr_gid, current_fsgid())) {
847 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
848 } else {
849 spin_unlock(&inode->i_lock);
850 write_inode_now(inode, 1);
851 goto again;
852 }
853 } else {
854 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
855 ORANGEFS_I(inode)->attr_uid = current_fsuid();
856 ORANGEFS_I(inode)->attr_gid = current_fsgid();
857 }
858 setattr_copy(inode, iattr);
859 spin_unlock(&inode->i_lock);
860 mark_inode_dirty(inode);
861
862 if (iattr->ia_valid & ATTR_MODE)
863 /* change mod on a file that has ACLs */
864 ret = posix_acl_chmod(inode, inode->i_mode);
865
866 ret = 0;
867out:
868 return ret;
869}
870
871/*
872 * Change attributes of an object referenced by dentry.
873 */
874int orangefs_setattr(struct dentry *dentry, struct iattr *iattr)
875{
876 int ret;
877 gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n",
878 dentry);
879 ret = setattr_prepare(dentry, iattr);
880 if (ret)
881 goto out;
882 ret = __orangefs_setattr(d_inode(dentry), iattr);
883 sync_inode_metadata(d_inode(dentry), 1);
884out:
885 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n",
886 ret);
887 return ret;
888}
889
890/*
891 * Obtain attributes of an object given a dentry
892 */
893int orangefs_getattr(const struct path *path, struct kstat *stat,
894 u32 request_mask, unsigned int flags)
895{
896 int ret;
897 struct inode *inode = path->dentry->d_inode;
898
899 gossip_debug(GOSSIP_INODE_DEBUG,
900 "orangefs_getattr: called on %pd mask %u\n",
901 path->dentry, request_mask);
902
903 ret = orangefs_inode_getattr(inode,
904 request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0);
905 if (ret == 0) {
906 generic_fillattr(inode, stat);
907
908 /* override block size reported to stat */
909 if (!(request_mask & STATX_SIZE))
910 stat->result_mask &= ~STATX_SIZE;
911
912 stat->attributes_mask = STATX_ATTR_IMMUTABLE |
913 STATX_ATTR_APPEND;
914 if (inode->i_flags & S_IMMUTABLE)
915 stat->attributes |= STATX_ATTR_IMMUTABLE;
916 if (inode->i_flags & S_APPEND)
917 stat->attributes |= STATX_ATTR_APPEND;
918 }
919 return ret;
920}
921
922int orangefs_permission(struct inode *inode, int mask)
923{
924 int ret;
925
926 if (mask & MAY_NOT_BLOCK)
927 return -ECHILD;
928
929 gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
930
931 /* Make sure the permission (and other common attrs) are up to date. */
932 ret = orangefs_inode_getattr(inode, 0);
933 if (ret < 0)
934 return ret;
935
936 return generic_permission(inode, mask);
937}
938
939int orangefs_update_time(struct inode *inode, struct timespec64 *time, int flags)
940{
941 struct iattr iattr;
942 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n",
943 get_khandle_from_ino(inode));
944 generic_update_time(inode, time, flags);
945 memset(&iattr, 0, sizeof iattr);
946 if (flags & S_ATIME)
947 iattr.ia_valid |= ATTR_ATIME;
948 if (flags & S_CTIME)
949 iattr.ia_valid |= ATTR_CTIME;
950 if (flags & S_MTIME)
951 iattr.ia_valid |= ATTR_MTIME;
952 return __orangefs_setattr(inode, &iattr);
953}
954
955/* ORANGEFS2 implementation of VFS inode operations for files */
956static const struct inode_operations orangefs_file_inode_operations = {
957 .get_acl = orangefs_get_acl,
958 .set_acl = orangefs_set_acl,
959 .setattr = orangefs_setattr,
960 .getattr = orangefs_getattr,
961 .listxattr = orangefs_listxattr,
962 .permission = orangefs_permission,
963 .update_time = orangefs_update_time,
964};
965
966static int orangefs_init_iops(struct inode *inode)
967{
968 inode->i_mapping->a_ops = &orangefs_address_operations;
969
970 switch (inode->i_mode & S_IFMT) {
971 case S_IFREG:
972 inode->i_op = &orangefs_file_inode_operations;
973 inode->i_fop = &orangefs_file_operations;
974 break;
975 case S_IFLNK:
976 inode->i_op = &orangefs_symlink_inode_operations;
977 break;
978 case S_IFDIR:
979 inode->i_op = &orangefs_dir_inode_operations;
980 inode->i_fop = &orangefs_dir_operations;
981 break;
982 default:
983 gossip_debug(GOSSIP_INODE_DEBUG,
984 "%s: unsupported mode\n",
985 __func__);
986 return -EINVAL;
987 }
988
989 return 0;
990}
991
992/*
993 * Given an ORANGEFS object identifier (fsid, handle), convert it into
994 * a ino_t type that will be used as a hash-index from where the handle will
995 * be searched for in the VFS hash table of inodes.
996 */
997static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
998{
999 if (!ref)
1000 return 0;
1001 return orangefs_khandle_to_ino(&(ref->khandle));
1002}
1003
1004/*
1005 * Called to set up an inode from iget5_locked.
1006 */
1007static int orangefs_set_inode(struct inode *inode, void *data)
1008{
1009 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
1010 ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
1011 ORANGEFS_I(inode)->refn.khandle = ref->khandle;
1012 ORANGEFS_I(inode)->attr_valid = 0;
1013 hash_init(ORANGEFS_I(inode)->xattr_cache);
1014 ORANGEFS_I(inode)->mapping_time = jiffies - 1;
1015 ORANGEFS_I(inode)->bitlock = 0;
1016 return 0;
1017}
1018
1019/*
1020 * Called to determine if handles match.
1021 */
1022static int orangefs_test_inode(struct inode *inode, void *data)
1023{
1024 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
1025 struct orangefs_inode_s *orangefs_inode = NULL;
1026
1027 orangefs_inode = ORANGEFS_I(inode);
1028 /* test handles and fs_ids... */
1029 return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle),
1030 &(ref->khandle)) &&
1031 orangefs_inode->refn.fs_id == ref->fs_id);
1032}
1033
1034/*
1035 * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
1036 * file handle.
1037 *
1038 * @sb: the file system super block instance.
1039 * @ref: The ORANGEFS object for which we are trying to locate an inode.
1040 */
1041struct inode *orangefs_iget(struct super_block *sb,
1042 struct orangefs_object_kref *ref)
1043{
1044 struct inode *inode = NULL;
1045 unsigned long hash;
1046 int error;
1047
1048 hash = orangefs_handle_hash(ref);
1049 inode = iget5_locked(sb,
1050 hash,
1051 orangefs_test_inode,
1052 orangefs_set_inode,
1053 ref);
1054
1055 if (!inode)
1056 return ERR_PTR(-ENOMEM);
1057
1058 if (!(inode->i_state & I_NEW))
1059 return inode;
1060
1061 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
1062 if (error) {
1063 iget_failed(inode);
1064 return ERR_PTR(error);
1065 }
1066
1067 inode->i_ino = hash; /* needed for stat etc */
1068 orangefs_init_iops(inode);
1069 unlock_new_inode(inode);
1070
1071 gossip_debug(GOSSIP_INODE_DEBUG,
1072 "iget handle %pU, fsid %d hash %ld i_ino %lu\n",
1073 &ref->khandle,
1074 ref->fs_id,
1075 hash,
1076 inode->i_ino);
1077
1078 return inode;
1079}
1080
1081/*
1082 * Allocate an inode for a newly created file and insert it into the inode hash.
1083 */
1084struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir,
1085 int mode, dev_t dev, struct orangefs_object_kref *ref)
1086{
1087 unsigned long hash = orangefs_handle_hash(ref);
1088 struct inode *inode;
1089 int error;
1090
1091 gossip_debug(GOSSIP_INODE_DEBUG,
1092 "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n",
1093 __func__,
1094 sb,
1095 MAJOR(dev),
1096 MINOR(dev),
1097 mode);
1098
1099 inode = new_inode(sb);
1100 if (!inode)
1101 return ERR_PTR(-ENOMEM);
1102
1103 orangefs_set_inode(inode, ref);
1104 inode->i_ino = hash; /* needed for stat etc */
1105
1106 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
1107 if (error)
1108 goto out_iput;
1109
1110 orangefs_init_iops(inode);
1111 inode->i_rdev = dev;
1112
1113 error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
1114 if (error < 0)
1115 goto out_iput;
1116
1117 gossip_debug(GOSSIP_INODE_DEBUG,
1118 "Initializing ACL's for inode %pU\n",
1119 get_khandle_from_ino(inode));
1120 orangefs_init_acl(inode, dir);
1121 return inode;
1122
1123out_iput:
1124 iput(inode);
1125 return ERR_PTR(error);
1126}