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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/blkdev.h>
14#include <linux/fileattr.h>
15#include "protocol.h"
16#include "orangefs-kernel.h"
17#include "orangefs-bufmap.h"
18
19static int orangefs_writepage_locked(struct page *page,
20 struct writeback_control *wbc)
21{
22 struct inode *inode = page->mapping->host;
23 struct orangefs_write_range *wr = NULL;
24 struct iov_iter iter;
25 struct bio_vec bv;
26 size_t len, wlen;
27 ssize_t ret;
28 loff_t off;
29
30 set_page_writeback(page);
31
32 len = i_size_read(inode);
33 if (PagePrivate(page)) {
34 wr = (struct orangefs_write_range *)page_private(page);
35 WARN_ON(wr->pos >= len);
36 off = wr->pos;
37 if (off + wr->len > len)
38 wlen = len - off;
39 else
40 wlen = wr->len;
41 } else {
42 WARN_ON(1);
43 off = page_offset(page);
44 if (off + PAGE_SIZE > len)
45 wlen = len - off;
46 else
47 wlen = PAGE_SIZE;
48 }
49 /* Should've been handled in orangefs_invalidate_folio. */
50 WARN_ON(off == len || off + wlen > len);
51
52 bv.bv_page = page;
53 bv.bv_len = wlen;
54 bv.bv_offset = off % PAGE_SIZE;
55 WARN_ON(wlen == 0);
56 iov_iter_bvec(&iter, ITER_SOURCE, &bv, 1, wlen);
57
58 ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, wlen,
59 len, wr, NULL, NULL);
60 if (ret < 0) {
61 SetPageError(page);
62 mapping_set_error(page->mapping, ret);
63 } else {
64 ret = 0;
65 }
66 kfree(detach_page_private(page));
67 return ret;
68}
69
70static int orangefs_writepage(struct page *page, struct writeback_control *wbc)
71{
72 int ret;
73 ret = orangefs_writepage_locked(page, wbc);
74 unlock_page(page);
75 end_page_writeback(page);
76 return ret;
77}
78
79struct orangefs_writepages {
80 loff_t off;
81 size_t len;
82 kuid_t uid;
83 kgid_t gid;
84 int maxpages;
85 int npages;
86 struct page **pages;
87 struct bio_vec *bv;
88};
89
90static int orangefs_writepages_work(struct orangefs_writepages *ow,
91 struct writeback_control *wbc)
92{
93 struct inode *inode = ow->pages[0]->mapping->host;
94 struct orangefs_write_range *wrp, wr;
95 struct iov_iter iter;
96 ssize_t ret;
97 size_t len;
98 loff_t off;
99 int i;
100
101 len = i_size_read(inode);
102
103 for (i = 0; i < ow->npages; i++) {
104 set_page_writeback(ow->pages[i]);
105 ow->bv[i].bv_page = ow->pages[i];
106 ow->bv[i].bv_len = min(page_offset(ow->pages[i]) + PAGE_SIZE,
107 ow->off + ow->len) -
108 max(ow->off, page_offset(ow->pages[i]));
109 if (i == 0)
110 ow->bv[i].bv_offset = ow->off -
111 page_offset(ow->pages[i]);
112 else
113 ow->bv[i].bv_offset = 0;
114 }
115 iov_iter_bvec(&iter, ITER_SOURCE, ow->bv, ow->npages, ow->len);
116
117 WARN_ON(ow->off >= len);
118 if (ow->off + ow->len > len)
119 ow->len = len - ow->off;
120
121 off = ow->off;
122 wr.uid = ow->uid;
123 wr.gid = ow->gid;
124 ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, ow->len,
125 0, &wr, NULL, NULL);
126 if (ret < 0) {
127 for (i = 0; i < ow->npages; i++) {
128 SetPageError(ow->pages[i]);
129 mapping_set_error(ow->pages[i]->mapping, ret);
130 if (PagePrivate(ow->pages[i])) {
131 wrp = (struct orangefs_write_range *)
132 page_private(ow->pages[i]);
133 ClearPagePrivate(ow->pages[i]);
134 put_page(ow->pages[i]);
135 kfree(wrp);
136 }
137 end_page_writeback(ow->pages[i]);
138 unlock_page(ow->pages[i]);
139 }
140 } else {
141 ret = 0;
142 for (i = 0; i < ow->npages; i++) {
143 if (PagePrivate(ow->pages[i])) {
144 wrp = (struct orangefs_write_range *)
145 page_private(ow->pages[i]);
146 ClearPagePrivate(ow->pages[i]);
147 put_page(ow->pages[i]);
148 kfree(wrp);
149 }
150 end_page_writeback(ow->pages[i]);
151 unlock_page(ow->pages[i]);
152 }
153 }
154 return ret;
155}
156
157static int orangefs_writepages_callback(struct page *page,
158 struct writeback_control *wbc, void *data)
159{
160 struct orangefs_writepages *ow = data;
161 struct orangefs_write_range *wr;
162 int ret;
163
164 if (!PagePrivate(page)) {
165 unlock_page(page);
166 /* It's not private so there's nothing to write, right? */
167 printk("writepages_callback not private!\n");
168 BUG();
169 return 0;
170 }
171 wr = (struct orangefs_write_range *)page_private(page);
172
173 ret = -1;
174 if (ow->npages == 0) {
175 ow->off = wr->pos;
176 ow->len = wr->len;
177 ow->uid = wr->uid;
178 ow->gid = wr->gid;
179 ow->pages[ow->npages++] = page;
180 ret = 0;
181 goto done;
182 }
183 if (!uid_eq(ow->uid, wr->uid) || !gid_eq(ow->gid, wr->gid)) {
184 orangefs_writepages_work(ow, wbc);
185 ow->npages = 0;
186 ret = -1;
187 goto done;
188 }
189 if (ow->off + ow->len == wr->pos) {
190 ow->len += wr->len;
191 ow->pages[ow->npages++] = page;
192 ret = 0;
193 goto done;
194 }
195done:
196 if (ret == -1) {
197 if (ow->npages) {
198 orangefs_writepages_work(ow, wbc);
199 ow->npages = 0;
200 }
201 ret = orangefs_writepage_locked(page, wbc);
202 mapping_set_error(page->mapping, ret);
203 unlock_page(page);
204 end_page_writeback(page);
205 } else {
206 if (ow->npages == ow->maxpages) {
207 orangefs_writepages_work(ow, wbc);
208 ow->npages = 0;
209 }
210 }
211 return ret;
212}
213
214static int orangefs_writepages(struct address_space *mapping,
215 struct writeback_control *wbc)
216{
217 struct orangefs_writepages *ow;
218 struct blk_plug plug;
219 int ret;
220 ow = kzalloc(sizeof(struct orangefs_writepages), GFP_KERNEL);
221 if (!ow)
222 return -ENOMEM;
223 ow->maxpages = orangefs_bufmap_size_query()/PAGE_SIZE;
224 ow->pages = kcalloc(ow->maxpages, sizeof(struct page *), GFP_KERNEL);
225 if (!ow->pages) {
226 kfree(ow);
227 return -ENOMEM;
228 }
229 ow->bv = kcalloc(ow->maxpages, sizeof(struct bio_vec), GFP_KERNEL);
230 if (!ow->bv) {
231 kfree(ow->pages);
232 kfree(ow);
233 return -ENOMEM;
234 }
235 blk_start_plug(&plug);
236 ret = write_cache_pages(mapping, wbc, orangefs_writepages_callback, ow);
237 if (ow->npages)
238 ret = orangefs_writepages_work(ow, wbc);
239 blk_finish_plug(&plug);
240 kfree(ow->pages);
241 kfree(ow->bv);
242 kfree(ow);
243 return ret;
244}
245
246static int orangefs_launder_folio(struct folio *);
247
248static void orangefs_readahead(struct readahead_control *rac)
249{
250 loff_t offset;
251 struct iov_iter iter;
252 struct inode *inode = rac->mapping->host;
253 struct xarray *i_pages;
254 struct page *page;
255 loff_t new_start = readahead_pos(rac);
256 int ret;
257 size_t new_len = 0;
258
259 loff_t bytes_remaining = inode->i_size - readahead_pos(rac);
260 loff_t pages_remaining = bytes_remaining / PAGE_SIZE;
261
262 if (pages_remaining >= 1024)
263 new_len = 4194304;
264 else if (pages_remaining > readahead_count(rac))
265 new_len = bytes_remaining;
266
267 if (new_len)
268 readahead_expand(rac, new_start, new_len);
269
270 offset = readahead_pos(rac);
271 i_pages = &rac->mapping->i_pages;
272
273 iov_iter_xarray(&iter, ITER_DEST, i_pages, offset, readahead_length(rac));
274
275 /* read in the pages. */
276 if ((ret = wait_for_direct_io(ORANGEFS_IO_READ, inode,
277 &offset, &iter, readahead_length(rac),
278 inode->i_size, NULL, NULL, rac->file)) < 0)
279 gossip_debug(GOSSIP_FILE_DEBUG,
280 "%s: wait_for_direct_io failed. \n", __func__);
281 else
282 ret = 0;
283
284 /* clean up. */
285 while ((page = readahead_page(rac))) {
286 page_endio(page, false, ret);
287 put_page(page);
288 }
289}
290
291static int orangefs_read_folio(struct file *file, struct folio *folio)
292{
293 struct inode *inode = folio->mapping->host;
294 struct iov_iter iter;
295 struct bio_vec bv;
296 ssize_t ret;
297 loff_t off; /* offset of this folio in the file */
298
299 if (folio_test_dirty(folio))
300 orangefs_launder_folio(folio);
301
302 off = folio_pos(folio);
303 bv.bv_page = &folio->page;
304 bv.bv_len = folio_size(folio);
305 bv.bv_offset = 0;
306 iov_iter_bvec(&iter, ITER_DEST, &bv, 1, folio_size(folio));
307
308 ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, &off, &iter,
309 folio_size(folio), inode->i_size, NULL, NULL, file);
310 /* this will only zero remaining unread portions of the folio data */
311 iov_iter_zero(~0U, &iter);
312 /* takes care of potential aliasing */
313 flush_dcache_folio(folio);
314 if (ret < 0) {
315 folio_set_error(folio);
316 } else {
317 folio_mark_uptodate(folio);
318 ret = 0;
319 }
320 /* unlock the folio after the ->read_folio() routine completes */
321 folio_unlock(folio);
322 return ret;
323}
324
325static int orangefs_write_begin(struct file *file,
326 struct address_space *mapping, loff_t pos, unsigned len,
327 struct page **pagep, void **fsdata)
328{
329 struct orangefs_write_range *wr;
330 struct folio *folio;
331 struct page *page;
332 pgoff_t index;
333 int ret;
334
335 index = pos >> PAGE_SHIFT;
336
337 page = grab_cache_page_write_begin(mapping, index);
338 if (!page)
339 return -ENOMEM;
340
341 *pagep = page;
342 folio = page_folio(page);
343
344 if (folio_test_dirty(folio) && !folio_test_private(folio)) {
345 /*
346 * Should be impossible. If it happens, launder the page
347 * since we don't know what's dirty. This will WARN in
348 * orangefs_writepage_locked.
349 */
350 ret = orangefs_launder_folio(folio);
351 if (ret)
352 return ret;
353 }
354 if (folio_test_private(folio)) {
355 struct orangefs_write_range *wr;
356 wr = folio_get_private(folio);
357 if (wr->pos + wr->len == pos &&
358 uid_eq(wr->uid, current_fsuid()) &&
359 gid_eq(wr->gid, current_fsgid())) {
360 wr->len += len;
361 goto okay;
362 } else {
363 ret = orangefs_launder_folio(folio);
364 if (ret)
365 return ret;
366 }
367 }
368
369 wr = kmalloc(sizeof *wr, GFP_KERNEL);
370 if (!wr)
371 return -ENOMEM;
372
373 wr->pos = pos;
374 wr->len = len;
375 wr->uid = current_fsuid();
376 wr->gid = current_fsgid();
377 folio_attach_private(folio, wr);
378okay:
379 return 0;
380}
381
382static int orangefs_write_end(struct file *file, struct address_space *mapping,
383 loff_t pos, unsigned len, unsigned copied, struct page *page, void *fsdata)
384{
385 struct inode *inode = page->mapping->host;
386 loff_t last_pos = pos + copied;
387
388 /*
389 * No need to use i_size_read() here, the i_size
390 * cannot change under us because we hold the i_mutex.
391 */
392 if (last_pos > inode->i_size)
393 i_size_write(inode, last_pos);
394
395 /* zero the stale part of the page if we did a short copy */
396 if (!PageUptodate(page)) {
397 unsigned from = pos & (PAGE_SIZE - 1);
398 if (copied < len) {
399 zero_user(page, from + copied, len - copied);
400 }
401 /* Set fully written pages uptodate. */
402 if (pos == page_offset(page) &&
403 (len == PAGE_SIZE || pos + len == inode->i_size)) {
404 zero_user_segment(page, from + copied, PAGE_SIZE);
405 SetPageUptodate(page);
406 }
407 }
408
409 set_page_dirty(page);
410 unlock_page(page);
411 put_page(page);
412
413 mark_inode_dirty_sync(file_inode(file));
414 return copied;
415}
416
417static void orangefs_invalidate_folio(struct folio *folio,
418 size_t offset, size_t length)
419{
420 struct orangefs_write_range *wr = folio_get_private(folio);
421
422 if (offset == 0 && length == PAGE_SIZE) {
423 kfree(folio_detach_private(folio));
424 return;
425 /* write range entirely within invalidate range (or equal) */
426 } else if (folio_pos(folio) + offset <= wr->pos &&
427 wr->pos + wr->len <= folio_pos(folio) + offset + length) {
428 kfree(folio_detach_private(folio));
429 /* XXX is this right? only caller in fs */
430 folio_cancel_dirty(folio);
431 return;
432 /* invalidate range chops off end of write range */
433 } else if (wr->pos < folio_pos(folio) + offset &&
434 wr->pos + wr->len <= folio_pos(folio) + offset + length &&
435 folio_pos(folio) + offset < wr->pos + wr->len) {
436 size_t x;
437 x = wr->pos + wr->len - (folio_pos(folio) + offset);
438 WARN_ON(x > wr->len);
439 wr->len -= x;
440 wr->uid = current_fsuid();
441 wr->gid = current_fsgid();
442 /* invalidate range chops off beginning of write range */
443 } else if (folio_pos(folio) + offset <= wr->pos &&
444 folio_pos(folio) + offset + length < wr->pos + wr->len &&
445 wr->pos < folio_pos(folio) + offset + length) {
446 size_t x;
447 x = folio_pos(folio) + offset + length - wr->pos;
448 WARN_ON(x > wr->len);
449 wr->pos += x;
450 wr->len -= x;
451 wr->uid = current_fsuid();
452 wr->gid = current_fsgid();
453 /* invalidate range entirely within write range (punch hole) */
454 } else if (wr->pos < folio_pos(folio) + offset &&
455 folio_pos(folio) + offset + length < wr->pos + wr->len) {
456 /* XXX what do we do here... should not WARN_ON */
457 WARN_ON(1);
458 /* punch hole */
459 /*
460 * should we just ignore this and write it out anyway?
461 * it hardly makes sense
462 */
463 return;
464 /* non-overlapping ranges */
465 } else {
466 /* WARN if they do overlap */
467 if (!((folio_pos(folio) + offset + length <= wr->pos) ^
468 (wr->pos + wr->len <= folio_pos(folio) + offset))) {
469 WARN_ON(1);
470 printk("invalidate range offset %llu length %zu\n",
471 folio_pos(folio) + offset, length);
472 printk("write range offset %llu length %zu\n",
473 wr->pos, wr->len);
474 }
475 return;
476 }
477
478 /*
479 * Above there are returns where wr is freed or where we WARN.
480 * Thus the following runs if wr was modified above.
481 */
482
483 orangefs_launder_folio(folio);
484}
485
486static bool orangefs_release_folio(struct folio *folio, gfp_t foo)
487{
488 return !folio_test_private(folio);
489}
490
491static void orangefs_free_folio(struct folio *folio)
492{
493 kfree(folio_detach_private(folio));
494}
495
496static int orangefs_launder_folio(struct folio *folio)
497{
498 int r = 0;
499 struct writeback_control wbc = {
500 .sync_mode = WB_SYNC_ALL,
501 .nr_to_write = 0,
502 };
503 folio_wait_writeback(folio);
504 if (folio_clear_dirty_for_io(folio)) {
505 r = orangefs_writepage_locked(&folio->page, &wbc);
506 folio_end_writeback(folio);
507 }
508 return r;
509}
510
511static ssize_t orangefs_direct_IO(struct kiocb *iocb,
512 struct iov_iter *iter)
513{
514 /*
515 * Comment from original do_readv_writev:
516 * Common entry point for read/write/readv/writev
517 * This function will dispatch it to either the direct I/O
518 * or buffered I/O path depending on the mount options and/or
519 * augmented/extended metadata attached to the file.
520 * Note: File extended attributes override any mount options.
521 */
522 struct file *file = iocb->ki_filp;
523 loff_t pos = iocb->ki_pos;
524 enum ORANGEFS_io_type type = iov_iter_rw(iter) == WRITE ?
525 ORANGEFS_IO_WRITE : ORANGEFS_IO_READ;
526 loff_t *offset = &pos;
527 struct inode *inode = file->f_mapping->host;
528 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
529 struct orangefs_khandle *handle = &orangefs_inode->refn.khandle;
530 size_t count = iov_iter_count(iter);
531 ssize_t total_count = 0;
532 ssize_t ret = -EINVAL;
533
534 gossip_debug(GOSSIP_FILE_DEBUG,
535 "%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n",
536 __func__,
537 handle,
538 (int)count);
539
540 if (type == ORANGEFS_IO_WRITE) {
541 gossip_debug(GOSSIP_FILE_DEBUG,
542 "%s(%pU): proceeding with offset : %llu, "
543 "size %d\n",
544 __func__,
545 handle,
546 llu(*offset),
547 (int)count);
548 }
549
550 if (count == 0) {
551 ret = 0;
552 goto out;
553 }
554
555 while (iov_iter_count(iter)) {
556 size_t each_count = iov_iter_count(iter);
557 size_t amt_complete;
558
559 /* how much to transfer in this loop iteration */
560 if (each_count > orangefs_bufmap_size_query())
561 each_count = orangefs_bufmap_size_query();
562
563 gossip_debug(GOSSIP_FILE_DEBUG,
564 "%s(%pU): size of each_count(%d)\n",
565 __func__,
566 handle,
567 (int)each_count);
568 gossip_debug(GOSSIP_FILE_DEBUG,
569 "%s(%pU): BEFORE wait_for_io: offset is %d\n",
570 __func__,
571 handle,
572 (int)*offset);
573
574 ret = wait_for_direct_io(type, inode, offset, iter,
575 each_count, 0, NULL, NULL, file);
576 gossip_debug(GOSSIP_FILE_DEBUG,
577 "%s(%pU): return from wait_for_io:%d\n",
578 __func__,
579 handle,
580 (int)ret);
581
582 if (ret < 0)
583 goto out;
584
585 *offset += ret;
586 total_count += ret;
587 amt_complete = ret;
588
589 gossip_debug(GOSSIP_FILE_DEBUG,
590 "%s(%pU): AFTER wait_for_io: offset is %d\n",
591 __func__,
592 handle,
593 (int)*offset);
594
595 /*
596 * if we got a short I/O operations,
597 * fall out and return what we got so far
598 */
599 if (amt_complete < each_count)
600 break;
601 } /*end while */
602
603out:
604 if (total_count > 0)
605 ret = total_count;
606 if (ret > 0) {
607 if (type == ORANGEFS_IO_READ) {
608 file_accessed(file);
609 } else {
610 file_update_time(file);
611 if (*offset > i_size_read(inode))
612 i_size_write(inode, *offset);
613 }
614 }
615
616 gossip_debug(GOSSIP_FILE_DEBUG,
617 "%s(%pU): Value(%d) returned.\n",
618 __func__,
619 handle,
620 (int)ret);
621
622 return ret;
623}
624
625/** ORANGEFS2 implementation of address space operations */
626static const struct address_space_operations orangefs_address_operations = {
627 .writepage = orangefs_writepage,
628 .readahead = orangefs_readahead,
629 .read_folio = orangefs_read_folio,
630 .writepages = orangefs_writepages,
631 .dirty_folio = filemap_dirty_folio,
632 .write_begin = orangefs_write_begin,
633 .write_end = orangefs_write_end,
634 .invalidate_folio = orangefs_invalidate_folio,
635 .release_folio = orangefs_release_folio,
636 .free_folio = orangefs_free_folio,
637 .launder_folio = orangefs_launder_folio,
638 .direct_IO = orangefs_direct_IO,
639};
640
641vm_fault_t orangefs_page_mkwrite(struct vm_fault *vmf)
642{
643 struct folio *folio = page_folio(vmf->page);
644 struct inode *inode = file_inode(vmf->vma->vm_file);
645 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
646 unsigned long *bitlock = &orangefs_inode->bitlock;
647 vm_fault_t ret;
648 struct orangefs_write_range *wr;
649
650 sb_start_pagefault(inode->i_sb);
651
652 if (wait_on_bit(bitlock, 1, TASK_KILLABLE)) {
653 ret = VM_FAULT_RETRY;
654 goto out;
655 }
656
657 folio_lock(folio);
658 if (folio_test_dirty(folio) && !folio_test_private(folio)) {
659 /*
660 * Should be impossible. If it happens, launder the folio
661 * since we don't know what's dirty. This will WARN in
662 * orangefs_writepage_locked.
663 */
664 if (orangefs_launder_folio(folio)) {
665 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
666 goto out;
667 }
668 }
669 if (folio_test_private(folio)) {
670 wr = folio_get_private(folio);
671 if (uid_eq(wr->uid, current_fsuid()) &&
672 gid_eq(wr->gid, current_fsgid())) {
673 wr->pos = page_offset(vmf->page);
674 wr->len = PAGE_SIZE;
675 goto okay;
676 } else {
677 if (orangefs_launder_folio(folio)) {
678 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
679 goto out;
680 }
681 }
682 }
683 wr = kmalloc(sizeof *wr, GFP_KERNEL);
684 if (!wr) {
685 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
686 goto out;
687 }
688 wr->pos = page_offset(vmf->page);
689 wr->len = PAGE_SIZE;
690 wr->uid = current_fsuid();
691 wr->gid = current_fsgid();
692 folio_attach_private(folio, wr);
693okay:
694
695 file_update_time(vmf->vma->vm_file);
696 if (folio->mapping != inode->i_mapping) {
697 folio_unlock(folio);
698 ret = VM_FAULT_LOCKED|VM_FAULT_NOPAGE;
699 goto out;
700 }
701
702 /*
703 * We mark the folio dirty already here so that when freeze is in
704 * progress, we are guaranteed that writeback during freezing will
705 * see the dirty folio and writeprotect it again.
706 */
707 folio_mark_dirty(folio);
708 folio_wait_stable(folio);
709 ret = VM_FAULT_LOCKED;
710out:
711 sb_end_pagefault(inode->i_sb);
712 return ret;
713}
714
715static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
716{
717 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
718 struct orangefs_kernel_op_s *new_op;
719 loff_t orig_size;
720 int ret = -EINVAL;
721
722 gossip_debug(GOSSIP_INODE_DEBUG,
723 "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n",
724 __func__,
725 get_khandle_from_ino(inode),
726 &orangefs_inode->refn.khandle,
727 orangefs_inode->refn.fs_id,
728 iattr->ia_size);
729
730 /* Ensure that we have a up to date size, so we know if it changed. */
731 ret = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_SIZE);
732 if (ret == -ESTALE)
733 ret = -EIO;
734 if (ret) {
735 gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
736 __func__, ret);
737 return ret;
738 }
739 orig_size = i_size_read(inode);
740
741 /* This is truncate_setsize in a different order. */
742 truncate_pagecache(inode, iattr->ia_size);
743 i_size_write(inode, iattr->ia_size);
744 if (iattr->ia_size > orig_size)
745 pagecache_isize_extended(inode, orig_size, iattr->ia_size);
746
747 new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE);
748 if (!new_op)
749 return -ENOMEM;
750
751 new_op->upcall.req.truncate.refn = orangefs_inode->refn;
752 new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;
753
754 ret = service_operation(new_op,
755 __func__,
756 get_interruptible_flag(inode));
757
758 /*
759 * the truncate has no downcall members to retrieve, but
760 * the status value tells us if it went through ok or not
761 */
762 gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret);
763
764 op_release(new_op);
765
766 if (ret != 0)
767 return ret;
768
769 if (orig_size != i_size_read(inode))
770 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
771
772 return ret;
773}
774
775int __orangefs_setattr(struct inode *inode, struct iattr *iattr)
776{
777 int ret;
778
779 if (iattr->ia_valid & ATTR_MODE) {
780 if (iattr->ia_mode & (S_ISVTX)) {
781 if (is_root_handle(inode)) {
782 /*
783 * allow sticky bit to be set on root (since
784 * it shows up that way by default anyhow),
785 * but don't show it to the server
786 */
787 iattr->ia_mode -= S_ISVTX;
788 } else {
789 gossip_debug(GOSSIP_UTILS_DEBUG,
790 "User attempted to set sticky bit on non-root directory; returning EINVAL.\n");
791 ret = -EINVAL;
792 goto out;
793 }
794 }
795 if (iattr->ia_mode & (S_ISUID)) {
796 gossip_debug(GOSSIP_UTILS_DEBUG,
797 "Attempting to set setuid bit (not supported); returning EINVAL.\n");
798 ret = -EINVAL;
799 goto out;
800 }
801 }
802
803 if (iattr->ia_valid & ATTR_SIZE) {
804 ret = orangefs_setattr_size(inode, iattr);
805 if (ret)
806 goto out;
807 }
808
809again:
810 spin_lock(&inode->i_lock);
811 if (ORANGEFS_I(inode)->attr_valid) {
812 if (uid_eq(ORANGEFS_I(inode)->attr_uid, current_fsuid()) &&
813 gid_eq(ORANGEFS_I(inode)->attr_gid, current_fsgid())) {
814 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
815 } else {
816 spin_unlock(&inode->i_lock);
817 write_inode_now(inode, 1);
818 goto again;
819 }
820 } else {
821 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
822 ORANGEFS_I(inode)->attr_uid = current_fsuid();
823 ORANGEFS_I(inode)->attr_gid = current_fsgid();
824 }
825 setattr_copy(&init_user_ns, inode, iattr);
826 spin_unlock(&inode->i_lock);
827 mark_inode_dirty(inode);
828
829 ret = 0;
830out:
831 return ret;
832}
833
834int __orangefs_setattr_mode(struct dentry *dentry, struct iattr *iattr)
835{
836 int ret;
837 struct inode *inode = d_inode(dentry);
838
839 ret = __orangefs_setattr(inode, iattr);
840 /* change mode on a file that has ACLs */
841 if (!ret && (iattr->ia_valid & ATTR_MODE))
842 ret = posix_acl_chmod(&init_user_ns, dentry, inode->i_mode);
843 return ret;
844}
845
846/*
847 * Change attributes of an object referenced by dentry.
848 */
849int orangefs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
850 struct iattr *iattr)
851{
852 int ret;
853 gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n",
854 dentry);
855 ret = setattr_prepare(&init_user_ns, dentry, iattr);
856 if (ret)
857 goto out;
858 ret = __orangefs_setattr_mode(dentry, iattr);
859 sync_inode_metadata(d_inode(dentry), 1);
860out:
861 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n",
862 ret);
863 return ret;
864}
865
866/*
867 * Obtain attributes of an object given a dentry
868 */
869int orangefs_getattr(struct user_namespace *mnt_userns, const struct path *path,
870 struct kstat *stat, u32 request_mask, unsigned int flags)
871{
872 int ret;
873 struct inode *inode = path->dentry->d_inode;
874
875 gossip_debug(GOSSIP_INODE_DEBUG,
876 "orangefs_getattr: called on %pd mask %u\n",
877 path->dentry, request_mask);
878
879 ret = orangefs_inode_getattr(inode,
880 request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0);
881 if (ret == 0) {
882 generic_fillattr(&init_user_ns, inode, stat);
883
884 /* override block size reported to stat */
885 if (!(request_mask & STATX_SIZE))
886 stat->result_mask &= ~STATX_SIZE;
887
888 generic_fill_statx_attr(inode, stat);
889 }
890 return ret;
891}
892
893int orangefs_permission(struct user_namespace *mnt_userns,
894 struct inode *inode, int mask)
895{
896 int ret;
897
898 if (mask & MAY_NOT_BLOCK)
899 return -ECHILD;
900
901 gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
902
903 /* Make sure the permission (and other common attrs) are up to date. */
904 ret = orangefs_inode_getattr(inode, 0);
905 if (ret < 0)
906 return ret;
907
908 return generic_permission(&init_user_ns, inode, mask);
909}
910
911int orangefs_update_time(struct inode *inode, struct timespec64 *time, int flags)
912{
913 struct iattr iattr;
914 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n",
915 get_khandle_from_ino(inode));
916 generic_update_time(inode, time, flags);
917 memset(&iattr, 0, sizeof iattr);
918 if (flags & S_ATIME)
919 iattr.ia_valid |= ATTR_ATIME;
920 if (flags & S_CTIME)
921 iattr.ia_valid |= ATTR_CTIME;
922 if (flags & S_MTIME)
923 iattr.ia_valid |= ATTR_MTIME;
924 return __orangefs_setattr(inode, &iattr);
925}
926
927static int orangefs_fileattr_get(struct dentry *dentry, struct fileattr *fa)
928{
929 u64 val = 0;
930 int ret;
931
932 gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__,
933 dentry);
934
935 ret = orangefs_inode_getxattr(d_inode(dentry),
936 "user.pvfs2.meta_hint",
937 &val, sizeof(val));
938 if (ret < 0 && ret != -ENODATA)
939 return ret;
940
941 gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val);
942
943 fileattr_fill_flags(fa, val);
944 return 0;
945}
946
947static int orangefs_fileattr_set(struct user_namespace *mnt_userns,
948 struct dentry *dentry, struct fileattr *fa)
949{
950 u64 val = 0;
951
952 gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__,
953 dentry);
954 /*
955 * ORANGEFS_MIRROR_FL is set internally when the mirroring mode is
956 * turned on for a file. The user is not allowed to turn on this bit,
957 * but the bit is present if the user first gets the flags and then
958 * updates the flags with some new settings. So, we ignore it in the
959 * following edit. bligon.
960 */
961 if (fileattr_has_fsx(fa) ||
962 (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NOATIME_FL | ORANGEFS_MIRROR_FL))) {
963 gossip_err("%s: only supports setting one of FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NOATIME_FL\n",
964 __func__);
965 return -EOPNOTSUPP;
966 }
967 val = fa->flags;
968 gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val);
969 return orangefs_inode_setxattr(d_inode(dentry),
970 "user.pvfs2.meta_hint",
971 &val, sizeof(val), 0);
972}
973
974/* ORANGEFS2 implementation of VFS inode operations for files */
975static const struct inode_operations orangefs_file_inode_operations = {
976 .get_inode_acl = orangefs_get_acl,
977 .set_acl = orangefs_set_acl,
978 .setattr = orangefs_setattr,
979 .getattr = orangefs_getattr,
980 .listxattr = orangefs_listxattr,
981 .permission = orangefs_permission,
982 .update_time = orangefs_update_time,
983 .fileattr_get = orangefs_fileattr_get,
984 .fileattr_set = orangefs_fileattr_set,
985};
986
987static int orangefs_init_iops(struct inode *inode)
988{
989 inode->i_mapping->a_ops = &orangefs_address_operations;
990
991 switch (inode->i_mode & S_IFMT) {
992 case S_IFREG:
993 inode->i_op = &orangefs_file_inode_operations;
994 inode->i_fop = &orangefs_file_operations;
995 break;
996 case S_IFLNK:
997 inode->i_op = &orangefs_symlink_inode_operations;
998 break;
999 case S_IFDIR:
1000 inode->i_op = &orangefs_dir_inode_operations;
1001 inode->i_fop = &orangefs_dir_operations;
1002 break;
1003 default:
1004 gossip_debug(GOSSIP_INODE_DEBUG,
1005 "%s: unsupported mode\n",
1006 __func__);
1007 return -EINVAL;
1008 }
1009
1010 return 0;
1011}
1012
1013/*
1014 * Given an ORANGEFS object identifier (fsid, handle), convert it into
1015 * a ino_t type that will be used as a hash-index from where the handle will
1016 * be searched for in the VFS hash table of inodes.
1017 */
1018static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
1019{
1020 if (!ref)
1021 return 0;
1022 return orangefs_khandle_to_ino(&(ref->khandle));
1023}
1024
1025/*
1026 * Called to set up an inode from iget5_locked.
1027 */
1028static int orangefs_set_inode(struct inode *inode, void *data)
1029{
1030 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
1031 ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
1032 ORANGEFS_I(inode)->refn.khandle = ref->khandle;
1033 ORANGEFS_I(inode)->attr_valid = 0;
1034 hash_init(ORANGEFS_I(inode)->xattr_cache);
1035 ORANGEFS_I(inode)->mapping_time = jiffies - 1;
1036 ORANGEFS_I(inode)->bitlock = 0;
1037 return 0;
1038}
1039
1040/*
1041 * Called to determine if handles match.
1042 */
1043static int orangefs_test_inode(struct inode *inode, void *data)
1044{
1045 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
1046 struct orangefs_inode_s *orangefs_inode = NULL;
1047
1048 orangefs_inode = ORANGEFS_I(inode);
1049 /* test handles and fs_ids... */
1050 return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle),
1051 &(ref->khandle)) &&
1052 orangefs_inode->refn.fs_id == ref->fs_id);
1053}
1054
1055/*
1056 * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
1057 * file handle.
1058 *
1059 * @sb: the file system super block instance.
1060 * @ref: The ORANGEFS object for which we are trying to locate an inode.
1061 */
1062struct inode *orangefs_iget(struct super_block *sb,
1063 struct orangefs_object_kref *ref)
1064{
1065 struct inode *inode = NULL;
1066 unsigned long hash;
1067 int error;
1068
1069 hash = orangefs_handle_hash(ref);
1070 inode = iget5_locked(sb,
1071 hash,
1072 orangefs_test_inode,
1073 orangefs_set_inode,
1074 ref);
1075
1076 if (!inode)
1077 return ERR_PTR(-ENOMEM);
1078
1079 if (!(inode->i_state & I_NEW))
1080 return inode;
1081
1082 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
1083 if (error) {
1084 iget_failed(inode);
1085 return ERR_PTR(error);
1086 }
1087
1088 inode->i_ino = hash; /* needed for stat etc */
1089 orangefs_init_iops(inode);
1090 unlock_new_inode(inode);
1091
1092 gossip_debug(GOSSIP_INODE_DEBUG,
1093 "iget handle %pU, fsid %d hash %ld i_ino %lu\n",
1094 &ref->khandle,
1095 ref->fs_id,
1096 hash,
1097 inode->i_ino);
1098
1099 return inode;
1100}
1101
1102/*
1103 * Allocate an inode for a newly created file and insert it into the inode hash.
1104 */
1105struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir,
1106 umode_t mode, dev_t dev, struct orangefs_object_kref *ref)
1107{
1108 struct posix_acl *acl = NULL, *default_acl = NULL;
1109 unsigned long hash = orangefs_handle_hash(ref);
1110 struct inode *inode;
1111 int error;
1112
1113 gossip_debug(GOSSIP_INODE_DEBUG,
1114 "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n",
1115 __func__,
1116 sb,
1117 MAJOR(dev),
1118 MINOR(dev),
1119 mode);
1120
1121 inode = new_inode(sb);
1122 if (!inode)
1123 return ERR_PTR(-ENOMEM);
1124
1125 error = posix_acl_create(dir, &mode, &default_acl, &acl);
1126 if (error)
1127 goto out_iput;
1128
1129 orangefs_set_inode(inode, ref);
1130 inode->i_ino = hash; /* needed for stat etc */
1131
1132 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
1133 if (error)
1134 goto out_iput;
1135
1136 orangefs_init_iops(inode);
1137 inode->i_rdev = dev;
1138
1139 if (default_acl) {
1140 error = __orangefs_set_acl(inode, default_acl,
1141 ACL_TYPE_DEFAULT);
1142 if (error)
1143 goto out_iput;
1144 }
1145
1146 if (acl) {
1147 error = __orangefs_set_acl(inode, acl, ACL_TYPE_ACCESS);
1148 if (error)
1149 goto out_iput;
1150 }
1151
1152 error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
1153 if (error < 0)
1154 goto out_iput;
1155
1156 gossip_debug(GOSSIP_INODE_DEBUG,
1157 "Initializing ACL's for inode %pU\n",
1158 get_khandle_from_ino(inode));
1159 if (mode != inode->i_mode) {
1160 struct iattr iattr = {
1161 .ia_mode = mode,
1162 .ia_valid = ATTR_MODE,
1163 };
1164 inode->i_mode = mode;
1165 __orangefs_setattr(inode, &iattr);
1166 __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
1167 }
1168 posix_acl_release(acl);
1169 posix_acl_release(default_acl);
1170 return inode;
1171
1172out_iput:
1173 iput(inode);
1174 posix_acl_release(acl);
1175 posix_acl_release(default_acl);
1176 return ERR_PTR(error);
1177}