Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
3d14c5d2 | 2 | #include <linux/ceph/ceph_debug.h> |
1d3576fd SW |
3 | |
4 | #include <linux/backing-dev.h> | |
5 | #include <linux/fs.h> | |
6 | #include <linux/mm.h> | |
7 | #include <linux/pagemap.h> | |
8 | #include <linux/writeback.h> /* generic_writepages */ | |
5a0e3ad6 | 9 | #include <linux/slab.h> |
1d3576fd SW |
10 | #include <linux/pagevec.h> |
11 | #include <linux/task_io_accounting_ops.h> | |
f361bf4a | 12 | #include <linux/signal.h> |
5c308356 | 13 | #include <linux/iversion.h> |
1d3576fd SW |
14 | |
15 | #include "super.h" | |
3d14c5d2 | 16 | #include "mds_client.h" |
99ccbd22 | 17 | #include "cache.h" |
3d14c5d2 | 18 | #include <linux/ceph/osd_client.h> |
08c1ac50 | 19 | #include <linux/ceph/striper.h> |
1d3576fd SW |
20 | |
21 | /* | |
22 | * Ceph address space ops. | |
23 | * | |
24 | * There are a few funny things going on here. | |
25 | * | |
26 | * The page->private field is used to reference a struct | |
27 | * ceph_snap_context for _every_ dirty page. This indicates which | |
28 | * snapshot the page was logically dirtied in, and thus which snap | |
29 | * context needs to be associated with the osd write during writeback. | |
30 | * | |
31 | * Similarly, struct ceph_inode_info maintains a set of counters to | |
25985edc | 32 | * count dirty pages on the inode. In the absence of snapshots, |
1d3576fd SW |
33 | * i_wrbuffer_ref == i_wrbuffer_ref_head == the dirty page count. |
34 | * | |
35 | * When a snapshot is taken (that is, when the client receives | |
36 | * notification that a snapshot was taken), each inode with caps and | |
37 | * with dirty pages (dirty pages implies there is a cap) gets a new | |
38 | * ceph_cap_snap in the i_cap_snaps list (which is sorted in ascending | |
39 | * order, new snaps go to the tail). The i_wrbuffer_ref_head count is | |
40 | * moved to capsnap->dirty. (Unless a sync write is currently in | |
41 | * progress. In that case, the capsnap is said to be "pending", new | |
42 | * writes cannot start, and the capsnap isn't "finalized" until the | |
43 | * write completes (or fails) and a final size/mtime for the inode for | |
44 | * that snap can be settled upon.) i_wrbuffer_ref_head is reset to 0. | |
45 | * | |
46 | * On writeback, we must submit writes to the osd IN SNAP ORDER. So, | |
47 | * we look for the first capsnap in i_cap_snaps and write out pages in | |
48 | * that snap context _only_. Then we move on to the next capsnap, | |
49 | * eventually reaching the "live" or "head" context (i.e., pages that | |
50 | * are not yet snapped) and are writing the most recently dirtied | |
51 | * pages. | |
52 | * | |
53 | * Invalidate and so forth must take care to ensure the dirty page | |
54 | * accounting is preserved. | |
55 | */ | |
56 | ||
2baba250 YS |
57 | #define CONGESTION_ON_THRESH(congestion_kb) (congestion_kb >> (PAGE_SHIFT-10)) |
58 | #define CONGESTION_OFF_THRESH(congestion_kb) \ | |
59 | (CONGESTION_ON_THRESH(congestion_kb) - \ | |
60 | (CONGESTION_ON_THRESH(congestion_kb) >> 2)) | |
61 | ||
61600ef8 YZ |
62 | static inline struct ceph_snap_context *page_snap_context(struct page *page) |
63 | { | |
64 | if (PagePrivate(page)) | |
65 | return (void *)page->private; | |
66 | return NULL; | |
67 | } | |
1d3576fd SW |
68 | |
69 | /* | |
70 | * Dirty a page. Optimistically adjust accounting, on the assumption | |
71 | * that we won't race with invalidate. If we do, readjust. | |
72 | */ | |
73 | static int ceph_set_page_dirty(struct page *page) | |
74 | { | |
75 | struct address_space *mapping = page->mapping; | |
76 | struct inode *inode; | |
77 | struct ceph_inode_info *ci; | |
1d3576fd | 78 | struct ceph_snap_context *snapc; |
7d6e1f54 | 79 | int ret; |
1d3576fd SW |
80 | |
81 | if (unlikely(!mapping)) | |
82 | return !TestSetPageDirty(page); | |
83 | ||
7d6e1f54 | 84 | if (PageDirty(page)) { |
1d3576fd SW |
85 | dout("%p set_page_dirty %p idx %lu -- already dirty\n", |
86 | mapping->host, page, page->index); | |
7d6e1f54 | 87 | BUG_ON(!PagePrivate(page)); |
1d3576fd SW |
88 | return 0; |
89 | } | |
90 | ||
91 | inode = mapping->host; | |
92 | ci = ceph_inode(inode); | |
93 | ||
1d3576fd | 94 | /* dirty the head */ |
be655596 | 95 | spin_lock(&ci->i_ceph_lock); |
5dda377c YZ |
96 | BUG_ON(ci->i_wr_ref == 0); // caller should hold Fw reference |
97 | if (__ceph_have_pending_cap_snap(ci)) { | |
98 | struct ceph_cap_snap *capsnap = | |
99 | list_last_entry(&ci->i_cap_snaps, | |
100 | struct ceph_cap_snap, | |
101 | ci_item); | |
102 | snapc = ceph_get_snap_context(capsnap->context); | |
103 | capsnap->dirty_pages++; | |
104 | } else { | |
105 | BUG_ON(!ci->i_head_snapc); | |
106 | snapc = ceph_get_snap_context(ci->i_head_snapc); | |
107 | ++ci->i_wrbuffer_ref_head; | |
108 | } | |
1d3576fd | 109 | if (ci->i_wrbuffer_ref == 0) |
0444d76a | 110 | ihold(inode); |
1d3576fd SW |
111 | ++ci->i_wrbuffer_ref; |
112 | dout("%p set_page_dirty %p idx %lu head %d/%d -> %d/%d " | |
113 | "snapc %p seq %lld (%d snaps)\n", | |
114 | mapping->host, page, page->index, | |
115 | ci->i_wrbuffer_ref-1, ci->i_wrbuffer_ref_head-1, | |
116 | ci->i_wrbuffer_ref, ci->i_wrbuffer_ref_head, | |
117 | snapc, snapc->seq, snapc->num_snaps); | |
be655596 | 118 | spin_unlock(&ci->i_ceph_lock); |
1d3576fd | 119 | |
7d6e1f54 SZ |
120 | /* |
121 | * Reference snap context in page->private. Also set | |
122 | * PagePrivate so that we get invalidatepage callback. | |
123 | */ | |
124 | BUG_ON(PagePrivate(page)); | |
125 | page->private = (unsigned long)snapc; | |
126 | SetPagePrivate(page); | |
1d3576fd | 127 | |
7d6e1f54 SZ |
128 | ret = __set_page_dirty_nobuffers(page); |
129 | WARN_ON(!PageLocked(page)); | |
130 | WARN_ON(!page->mapping); | |
1d3576fd | 131 | |
7d6e1f54 | 132 | return ret; |
1d3576fd SW |
133 | } |
134 | ||
135 | /* | |
136 | * If we are truncating the full page (i.e. offset == 0), adjust the | |
137 | * dirty page counters appropriately. Only called if there is private | |
138 | * data on the page. | |
139 | */ | |
d47992f8 LC |
140 | static void ceph_invalidatepage(struct page *page, unsigned int offset, |
141 | unsigned int length) | |
1d3576fd | 142 | { |
4ce1e9ad | 143 | struct inode *inode; |
1d3576fd | 144 | struct ceph_inode_info *ci; |
61600ef8 | 145 | struct ceph_snap_context *snapc = page_snap_context(page); |
1d3576fd | 146 | |
4ce1e9ad | 147 | inode = page->mapping->host; |
b150f5c1 MT |
148 | ci = ceph_inode(inode); |
149 | ||
09cbfeaf | 150 | if (offset != 0 || length != PAGE_SIZE) { |
b150f5c1 MT |
151 | dout("%p invalidatepage %p idx %lu partial dirty page %u~%u\n", |
152 | inode, page, page->index, offset, length); | |
153 | return; | |
154 | } | |
4ce1e9ad | 155 | |
99ccbd22 MT |
156 | ceph_invalidate_fscache_page(inode, page); |
157 | ||
b072d774 | 158 | WARN_ON(!PageLocked(page)); |
99ccbd22 MT |
159 | if (!PagePrivate(page)) |
160 | return; | |
161 | ||
b150f5c1 MT |
162 | dout("%p invalidatepage %p idx %lu full dirty page\n", |
163 | inode, page, page->index); | |
164 | ||
165 | ceph_put_wrbuffer_cap_refs(ci, 1, snapc); | |
166 | ceph_put_snap_context(snapc); | |
167 | page->private = 0; | |
168 | ClearPagePrivate(page); | |
1d3576fd SW |
169 | } |
170 | ||
1d3576fd SW |
171 | static int ceph_releasepage(struct page *page, gfp_t g) |
172 | { | |
e55f1a18 N |
173 | dout("%p releasepage %p idx %lu (%sdirty)\n", page->mapping->host, |
174 | page, page->index, PageDirty(page) ? "" : "not "); | |
99ccbd22 MT |
175 | |
176 | /* Can we release the page from the cache? */ | |
177 | if (!ceph_release_fscache_page(page, g)) | |
178 | return 0; | |
179 | ||
180 | return !PagePrivate(page); | |
1d3576fd SW |
181 | } |
182 | ||
5107d7d5 XL |
183 | /* |
184 | * Read some contiguous pages. If we cross a stripe boundary, shorten | |
185 | * *plen. Return number of bytes read, or error. | |
186 | */ | |
187 | static int ceph_sync_readpages(struct ceph_fs_client *fsc, | |
188 | struct ceph_vino vino, | |
189 | struct ceph_file_layout *layout, | |
190 | u64 off, u64 *plen, | |
191 | u32 truncate_seq, u64 truncate_size, | |
192 | struct page **pages, int num_pages, | |
193 | int page_align) | |
194 | { | |
195 | struct ceph_osd_client *osdc = &fsc->client->osdc; | |
196 | struct ceph_osd_request *req; | |
197 | int rc = 0; | |
198 | ||
199 | dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, | |
200 | vino.snap, off, *plen); | |
201 | req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1, | |
202 | CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, | |
203 | NULL, truncate_seq, truncate_size, | |
204 | false); | |
205 | if (IS_ERR(req)) | |
206 | return PTR_ERR(req); | |
207 | ||
208 | /* it may be a short read due to an object boundary */ | |
209 | osd_req_op_extent_osd_data_pages(req, 0, | |
210 | pages, *plen, page_align, false, false); | |
211 | ||
212 | dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n", | |
213 | off, *plen, *plen, page_align); | |
214 | ||
215 | rc = ceph_osdc_start_request(osdc, req, false); | |
216 | if (!rc) | |
217 | rc = ceph_osdc_wait_request(osdc, req); | |
218 | ||
219 | ceph_osdc_put_request(req); | |
220 | dout("readpages result %d\n", rc); | |
221 | return rc; | |
222 | } | |
223 | ||
1d3576fd SW |
224 | /* |
225 | * read a single page, without unlocking it. | |
226 | */ | |
dd2bc473 | 227 | static int ceph_do_readpage(struct file *filp, struct page *page) |
1d3576fd | 228 | { |
496ad9aa | 229 | struct inode *inode = file_inode(filp); |
1d3576fd | 230 | struct ceph_inode_info *ci = ceph_inode(inode); |
131d7eb4 | 231 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
1d3576fd | 232 | int err = 0; |
83701246 | 233 | u64 off = page_offset(page); |
09cbfeaf | 234 | u64 len = PAGE_SIZE; |
1d3576fd | 235 | |
83701246 | 236 | if (off >= i_size_read(inode)) { |
09cbfeaf | 237 | zero_user_segment(page, 0, PAGE_SIZE); |
83701246 YZ |
238 | SetPageUptodate(page); |
239 | return 0; | |
240 | } | |
99ccbd22 | 241 | |
fcc02d2a YZ |
242 | if (ci->i_inline_version != CEPH_INLINE_NONE) { |
243 | /* | |
244 | * Uptodate inline data should have been added | |
245 | * into page cache while getting Fcr caps. | |
246 | */ | |
247 | if (off == 0) | |
248 | return -EINVAL; | |
09cbfeaf | 249 | zero_user_segment(page, 0, PAGE_SIZE); |
fcc02d2a YZ |
250 | SetPageUptodate(page); |
251 | return 0; | |
252 | } | |
83701246 YZ |
253 | |
254 | err = ceph_readpage_from_fscache(inode, page); | |
99ccbd22 | 255 | if (err == 0) |
dd2bc473 | 256 | return -EINPROGRESS; |
99ccbd22 | 257 | |
1d3576fd SW |
258 | dout("readpage inode %p file %p page %p index %lu\n", |
259 | inode, filp, page, page->index); | |
5107d7d5 | 260 | err = ceph_sync_readpages(fsc, ceph_vino(inode), |
131d7eb4 | 261 | &ci->i_layout, off, &len, |
1d3576fd | 262 | ci->i_truncate_seq, ci->i_truncate_size, |
b7495fc2 | 263 | &page, 1, 0); |
1d3576fd SW |
264 | if (err == -ENOENT) |
265 | err = 0; | |
266 | if (err < 0) { | |
267 | SetPageError(page); | |
18302805 | 268 | ceph_fscache_readpage_cancel(inode, page); |
131d7eb4 YZ |
269 | if (err == -EBLACKLISTED) |
270 | fsc->blacklisted = true; | |
1d3576fd | 271 | goto out; |
1d3576fd | 272 | } |
09cbfeaf | 273 | if (err < PAGE_SIZE) |
23cd573b | 274 | /* zero fill remainder of page */ |
09cbfeaf | 275 | zero_user_segment(page, err, PAGE_SIZE); |
23cd573b ZZ |
276 | else |
277 | flush_dcache_page(page); | |
1d3576fd | 278 | |
23cd573b ZZ |
279 | SetPageUptodate(page); |
280 | ceph_readpage_to_fscache(inode, page); | |
99ccbd22 | 281 | |
1d3576fd SW |
282 | out: |
283 | return err < 0 ? err : 0; | |
284 | } | |
285 | ||
286 | static int ceph_readpage(struct file *filp, struct page *page) | |
287 | { | |
dd2bc473 YZ |
288 | int r = ceph_do_readpage(filp, page); |
289 | if (r != -EINPROGRESS) | |
290 | unlock_page(page); | |
291 | else | |
292 | r = 0; | |
1d3576fd SW |
293 | return r; |
294 | } | |
295 | ||
296 | /* | |
7c272194 | 297 | * Finish an async read(ahead) op. |
1d3576fd | 298 | */ |
85e084fe | 299 | static void finish_read(struct ceph_osd_request *req) |
1d3576fd | 300 | { |
7c272194 | 301 | struct inode *inode = req->r_inode; |
87060c10 | 302 | struct ceph_osd_data *osd_data; |
85e084fe ID |
303 | int rc = req->r_result <= 0 ? req->r_result : 0; |
304 | int bytes = req->r_result >= 0 ? req->r_result : 0; | |
e0c59487 | 305 | int num_pages; |
7c272194 | 306 | int i; |
1d3576fd | 307 | |
7c272194 | 308 | dout("finish_read %p req %p rc %d bytes %d\n", inode, req, rc, bytes); |
131d7eb4 YZ |
309 | if (rc == -EBLACKLISTED) |
310 | ceph_inode_to_client(inode)->blacklisted = true; | |
7c272194 SW |
311 | |
312 | /* unlock all pages, zeroing any data we didn't read */ | |
406e2c9f | 313 | osd_data = osd_req_op_extent_osd_data(req, 0); |
87060c10 AE |
314 | BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGES); |
315 | num_pages = calc_pages_for((u64)osd_data->alignment, | |
316 | (u64)osd_data->length); | |
e0c59487 | 317 | for (i = 0; i < num_pages; i++) { |
87060c10 | 318 | struct page *page = osd_data->pages[i]; |
7c272194 | 319 | |
368e3585 YZ |
320 | if (rc < 0 && rc != -ENOENT) { |
321 | ceph_fscache_readpage_cancel(inode, page); | |
f36132a7 | 322 | goto unlock; |
368e3585 | 323 | } |
09cbfeaf | 324 | if (bytes < (int)PAGE_SIZE) { |
7c272194 SW |
325 | /* zero (remainder of) page */ |
326 | int s = bytes < 0 ? 0 : bytes; | |
09cbfeaf | 327 | zero_user_segment(page, s, PAGE_SIZE); |
1d3576fd | 328 | } |
7c272194 SW |
329 | dout("finish_read %p uptodate %p idx %lu\n", inode, page, |
330 | page->index); | |
331 | flush_dcache_page(page); | |
332 | SetPageUptodate(page); | |
99ccbd22 | 333 | ceph_readpage_to_fscache(inode, page); |
f36132a7 | 334 | unlock: |
7c272194 | 335 | unlock_page(page); |
09cbfeaf KS |
336 | put_page(page); |
337 | bytes -= PAGE_SIZE; | |
1d3576fd | 338 | } |
87060c10 | 339 | kfree(osd_data->pages); |
1d3576fd SW |
340 | } |
341 | ||
342 | /* | |
7c272194 SW |
343 | * start an async read(ahead) operation. return nr_pages we submitted |
344 | * a read for on success, or negative error code. | |
1d3576fd | 345 | */ |
5d988308 YZ |
346 | static int start_read(struct inode *inode, struct ceph_rw_context *rw_ctx, |
347 | struct list_head *page_list, int max) | |
1d3576fd | 348 | { |
3d14c5d2 YS |
349 | struct ceph_osd_client *osdc = |
350 | &ceph_inode_to_client(inode)->client->osdc; | |
7c272194 | 351 | struct ceph_inode_info *ci = ceph_inode(inode); |
f86196ea | 352 | struct page *page = lru_to_page(page_list); |
acead002 | 353 | struct ceph_vino vino; |
7c272194 SW |
354 | struct ceph_osd_request *req; |
355 | u64 off; | |
1d3576fd | 356 | u64 len; |
7c272194 SW |
357 | int i; |
358 | struct page **pages; | |
359 | pgoff_t next_index; | |
360 | int nr_pages = 0; | |
2b1ac852 YZ |
361 | int got = 0; |
362 | int ret = 0; | |
363 | ||
5d988308 | 364 | if (!rw_ctx) { |
2b1ac852 YZ |
365 | /* caller of readpages does not hold buffer and read caps |
366 | * (fadvise, madvise and readahead cases) */ | |
367 | int want = CEPH_CAP_FILE_CACHE; | |
5e3ded1b YZ |
368 | ret = ceph_try_get_caps(inode, CEPH_CAP_FILE_RD, want, |
369 | true, &got); | |
2b1ac852 YZ |
370 | if (ret < 0) { |
371 | dout("start_read %p, error getting cap\n", inode); | |
372 | } else if (!(got & want)) { | |
373 | dout("start_read %p, no cache cap\n", inode); | |
374 | ret = 0; | |
375 | } | |
376 | if (ret <= 0) { | |
377 | if (got) | |
378 | ceph_put_cap_refs(ci, got); | |
379 | while (!list_empty(page_list)) { | |
f86196ea | 380 | page = lru_to_page(page_list); |
2b1ac852 YZ |
381 | list_del(&page->lru); |
382 | put_page(page); | |
383 | } | |
384 | return ret; | |
385 | } | |
386 | } | |
1d3576fd | 387 | |
6285bc23 | 388 | off = (u64) page_offset(page); |
1d3576fd | 389 | |
7c272194 SW |
390 | /* count pages */ |
391 | next_index = page->index; | |
392 | list_for_each_entry_reverse(page, page_list, lru) { | |
393 | if (page->index != next_index) | |
394 | break; | |
395 | nr_pages++; | |
396 | next_index++; | |
0d66a487 SW |
397 | if (max && nr_pages == max) |
398 | break; | |
7c272194 | 399 | } |
09cbfeaf | 400 | len = nr_pages << PAGE_SHIFT; |
7c272194 SW |
401 | dout("start_read %p nr_pages %d is %lld~%lld\n", inode, nr_pages, |
402 | off, len); | |
acead002 AE |
403 | vino = ceph_vino(inode); |
404 | req = ceph_osdc_new_request(osdc, &ci->i_layout, vino, off, &len, | |
715e4cd4 | 405 | 0, 1, CEPH_OSD_OP_READ, |
acead002 | 406 | CEPH_OSD_FLAG_READ, NULL, |
7c272194 | 407 | ci->i_truncate_seq, ci->i_truncate_size, |
acead002 | 408 | false); |
2b1ac852 YZ |
409 | if (IS_ERR(req)) { |
410 | ret = PTR_ERR(req); | |
411 | goto out; | |
412 | } | |
1d3576fd | 413 | |
7c272194 | 414 | /* build page vector */ |
cf7b7e14 | 415 | nr_pages = calc_pages_for(0, len); |
6da2ec56 | 416 | pages = kmalloc_array(nr_pages, sizeof(*pages), GFP_KERNEL); |
2b1ac852 YZ |
417 | if (!pages) { |
418 | ret = -ENOMEM; | |
419 | goto out_put; | |
420 | } | |
7c272194 SW |
421 | for (i = 0; i < nr_pages; ++i) { |
422 | page = list_entry(page_list->prev, struct page, lru); | |
423 | BUG_ON(PageLocked(page)); | |
1d3576fd | 424 | list_del(&page->lru); |
99ccbd22 | 425 | |
7c272194 SW |
426 | dout("start_read %p adding %p idx %lu\n", inode, page, |
427 | page->index); | |
428 | if (add_to_page_cache_lru(page, &inode->i_data, page->index, | |
687265e5 | 429 | GFP_KERNEL)) { |
d4d3aa38 | 430 | ceph_fscache_uncache_page(inode, page); |
09cbfeaf | 431 | put_page(page); |
7c272194 | 432 | dout("start_read %p add_to_page_cache failed %p\n", |
1d3576fd | 433 | inode, page); |
7c272194 | 434 | nr_pages = i; |
1afe4785 YZ |
435 | if (nr_pages > 0) { |
436 | len = nr_pages << PAGE_SHIFT; | |
d641df81 | 437 | osd_req_op_extent_update(req, 0, len); |
1afe4785 YZ |
438 | break; |
439 | } | |
7c272194 | 440 | goto out_pages; |
1d3576fd | 441 | } |
7c272194 | 442 | pages[i] = page; |
1d3576fd | 443 | } |
406e2c9f | 444 | osd_req_op_extent_osd_data_pages(req, 0, pages, len, 0, false, false); |
7c272194 SW |
445 | req->r_callback = finish_read; |
446 | req->r_inode = inode; | |
447 | ||
448 | dout("start_read %p starting %p %lld~%lld\n", inode, req, off, len); | |
449 | ret = ceph_osdc_start_request(osdc, req, false); | |
450 | if (ret < 0) | |
451 | goto out_pages; | |
452 | ceph_osdc_put_request(req); | |
2b1ac852 YZ |
453 | |
454 | /* After adding locked pages to page cache, the inode holds cache cap. | |
455 | * So we can drop our cap refs. */ | |
456 | if (got) | |
457 | ceph_put_cap_refs(ci, got); | |
458 | ||
7c272194 SW |
459 | return nr_pages; |
460 | ||
461 | out_pages: | |
1afe4785 YZ |
462 | for (i = 0; i < nr_pages; ++i) { |
463 | ceph_fscache_readpage_cancel(inode, pages[i]); | |
464 | unlock_page(pages[i]); | |
465 | } | |
466 | ceph_put_page_vector(pages, nr_pages, false); | |
2b1ac852 | 467 | out_put: |
7c272194 | 468 | ceph_osdc_put_request(req); |
2b1ac852 YZ |
469 | out: |
470 | if (got) | |
471 | ceph_put_cap_refs(ci, got); | |
7c272194 SW |
472 | return ret; |
473 | } | |
1d3576fd | 474 | |
7c272194 SW |
475 | |
476 | /* | |
477 | * Read multiple pages. Leave pages we don't read + unlock in page_list; | |
478 | * the caller (VM) cleans them up. | |
479 | */ | |
480 | static int ceph_readpages(struct file *file, struct address_space *mapping, | |
481 | struct list_head *page_list, unsigned nr_pages) | |
482 | { | |
496ad9aa | 483 | struct inode *inode = file_inode(file); |
0d66a487 | 484 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
73737682 | 485 | struct ceph_file_info *fi = file->private_data; |
5d988308 | 486 | struct ceph_rw_context *rw_ctx; |
7c272194 | 487 | int rc = 0; |
0d66a487 SW |
488 | int max = 0; |
489 | ||
83701246 YZ |
490 | if (ceph_inode(inode)->i_inline_version != CEPH_INLINE_NONE) |
491 | return -EINVAL; | |
492 | ||
99ccbd22 MT |
493 | rc = ceph_readpages_from_fscache(mapping->host, mapping, page_list, |
494 | &nr_pages); | |
495 | ||
496 | if (rc == 0) | |
497 | goto out; | |
498 | ||
73737682 | 499 | rw_ctx = ceph_find_rw_context(fi); |
aa187926 | 500 | max = fsc->mount_options->rsize >> PAGE_SHIFT; |
5d988308 YZ |
501 | dout("readpages %p file %p ctx %p nr_pages %d max %d\n", |
502 | inode, file, rw_ctx, nr_pages, max); | |
7c272194 | 503 | while (!list_empty(page_list)) { |
5d988308 | 504 | rc = start_read(inode, rw_ctx, page_list, max); |
7c272194 SW |
505 | if (rc < 0) |
506 | goto out; | |
7c272194 | 507 | } |
1d3576fd | 508 | out: |
76be778b MT |
509 | ceph_fscache_readpages_cancel(inode, page_list); |
510 | ||
7c272194 | 511 | dout("readpages %p file %p ret %d\n", inode, file, rc); |
1d3576fd SW |
512 | return rc; |
513 | } | |
514 | ||
1f934b00 YZ |
515 | struct ceph_writeback_ctl |
516 | { | |
517 | loff_t i_size; | |
518 | u64 truncate_size; | |
519 | u32 truncate_seq; | |
520 | bool size_stable; | |
2a2d927e | 521 | bool head_snapc; |
1f934b00 YZ |
522 | }; |
523 | ||
1d3576fd SW |
524 | /* |
525 | * Get ref for the oldest snapc for an inode with dirty data... that is, the | |
526 | * only snap context we are allowed to write back. | |
1d3576fd | 527 | */ |
1f934b00 | 528 | static struct ceph_snap_context * |
05455e11 YZ |
529 | get_oldest_context(struct inode *inode, struct ceph_writeback_ctl *ctl, |
530 | struct ceph_snap_context *page_snapc) | |
1d3576fd SW |
531 | { |
532 | struct ceph_inode_info *ci = ceph_inode(inode); | |
533 | struct ceph_snap_context *snapc = NULL; | |
534 | struct ceph_cap_snap *capsnap = NULL; | |
535 | ||
be655596 | 536 | spin_lock(&ci->i_ceph_lock); |
1d3576fd SW |
537 | list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) { |
538 | dout(" cap_snap %p snapc %p has %d dirty pages\n", capsnap, | |
539 | capsnap->context, capsnap->dirty_pages); | |
05455e11 YZ |
540 | if (!capsnap->dirty_pages) |
541 | continue; | |
542 | ||
543 | /* get i_size, truncate_{seq,size} for page_snapc? */ | |
544 | if (snapc && capsnap->context != page_snapc) | |
545 | continue; | |
546 | ||
547 | if (ctl) { | |
548 | if (capsnap->writing) { | |
549 | ctl->i_size = i_size_read(inode); | |
550 | ctl->size_stable = false; | |
551 | } else { | |
552 | ctl->i_size = capsnap->size; | |
553 | ctl->size_stable = true; | |
1f934b00 | 554 | } |
05455e11 YZ |
555 | ctl->truncate_size = capsnap->truncate_size; |
556 | ctl->truncate_seq = capsnap->truncate_seq; | |
2a2d927e | 557 | ctl->head_snapc = false; |
1d3576fd | 558 | } |
05455e11 YZ |
559 | |
560 | if (snapc) | |
561 | break; | |
562 | ||
563 | snapc = ceph_get_snap_context(capsnap->context); | |
564 | if (!page_snapc || | |
565 | page_snapc == snapc || | |
566 | page_snapc->seq > snapc->seq) | |
567 | break; | |
1d3576fd | 568 | } |
7d8cb26d | 569 | if (!snapc && ci->i_wrbuffer_ref_head) { |
80e755fe | 570 | snapc = ceph_get_snap_context(ci->i_head_snapc); |
1d3576fd SW |
571 | dout(" head snapc %p has %d dirty pages\n", |
572 | snapc, ci->i_wrbuffer_ref_head); | |
1f934b00 YZ |
573 | if (ctl) { |
574 | ctl->i_size = i_size_read(inode); | |
575 | ctl->truncate_size = ci->i_truncate_size; | |
576 | ctl->truncate_seq = ci->i_truncate_seq; | |
577 | ctl->size_stable = false; | |
2a2d927e | 578 | ctl->head_snapc = true; |
1f934b00 | 579 | } |
1d3576fd | 580 | } |
be655596 | 581 | spin_unlock(&ci->i_ceph_lock); |
1d3576fd SW |
582 | return snapc; |
583 | } | |
584 | ||
1f934b00 YZ |
585 | static u64 get_writepages_data_length(struct inode *inode, |
586 | struct page *page, u64 start) | |
587 | { | |
588 | struct ceph_inode_info *ci = ceph_inode(inode); | |
589 | struct ceph_snap_context *snapc = page_snap_context(page); | |
590 | struct ceph_cap_snap *capsnap = NULL; | |
591 | u64 end = i_size_read(inode); | |
592 | ||
593 | if (snapc != ci->i_head_snapc) { | |
594 | bool found = false; | |
595 | spin_lock(&ci->i_ceph_lock); | |
596 | list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) { | |
597 | if (capsnap->context == snapc) { | |
598 | if (!capsnap->writing) | |
599 | end = capsnap->size; | |
600 | found = true; | |
601 | break; | |
602 | } | |
603 | } | |
604 | spin_unlock(&ci->i_ceph_lock); | |
605 | WARN_ON(!found); | |
606 | } | |
607 | if (end > page_offset(page) + PAGE_SIZE) | |
608 | end = page_offset(page) + PAGE_SIZE; | |
609 | return end > start ? end - start : 0; | |
610 | } | |
611 | ||
5107d7d5 XL |
612 | /* |
613 | * do a synchronous write on N pages | |
614 | */ | |
615 | static int ceph_sync_writepages(struct ceph_fs_client *fsc, | |
616 | struct ceph_vino vino, | |
617 | struct ceph_file_layout *layout, | |
618 | struct ceph_snap_context *snapc, | |
619 | u64 off, u64 len, | |
620 | u32 truncate_seq, u64 truncate_size, | |
621 | struct timespec64 *mtime, | |
622 | struct page **pages, int num_pages) | |
623 | { | |
624 | struct ceph_osd_client *osdc = &fsc->client->osdc; | |
625 | struct ceph_osd_request *req; | |
626 | int rc = 0; | |
627 | int page_align = off & ~PAGE_MASK; | |
628 | ||
629 | req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1, | |
630 | CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE, | |
631 | snapc, truncate_seq, truncate_size, | |
632 | true); | |
633 | if (IS_ERR(req)) | |
634 | return PTR_ERR(req); | |
635 | ||
636 | /* it may be a short write due to an object boundary */ | |
637 | osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align, | |
638 | false, false); | |
639 | dout("writepages %llu~%llu (%llu bytes)\n", off, len, len); | |
640 | ||
641 | req->r_mtime = *mtime; | |
642 | rc = ceph_osdc_start_request(osdc, req, true); | |
643 | if (!rc) | |
644 | rc = ceph_osdc_wait_request(osdc, req); | |
645 | ||
646 | ceph_osdc_put_request(req); | |
647 | if (rc == 0) | |
648 | rc = len; | |
649 | dout("writepages result %d\n", rc); | |
650 | return rc; | |
651 | } | |
652 | ||
1d3576fd SW |
653 | /* |
654 | * Write a single page, but leave the page locked. | |
655 | * | |
b72b13eb | 656 | * If we get a write error, mark the mapping for error, but still adjust the |
1d3576fd SW |
657 | * dirty page accounting (i.e., page is no longer dirty). |
658 | */ | |
659 | static int writepage_nounlock(struct page *page, struct writeback_control *wbc) | |
660 | { | |
661 | struct inode *inode; | |
662 | struct ceph_inode_info *ci; | |
3d14c5d2 | 663 | struct ceph_fs_client *fsc; |
6298a337 | 664 | struct ceph_snap_context *snapc, *oldest; |
fc2744aa | 665 | loff_t page_off = page_offset(page); |
43986881 | 666 | int err, len = PAGE_SIZE; |
1f934b00 | 667 | struct ceph_writeback_ctl ceph_wbc; |
1d3576fd SW |
668 | |
669 | dout("writepage %p idx %lu\n", page, page->index); | |
670 | ||
1d3576fd SW |
671 | inode = page->mapping->host; |
672 | ci = ceph_inode(inode); | |
3d14c5d2 | 673 | fsc = ceph_inode_to_client(inode); |
1d3576fd SW |
674 | |
675 | /* verify this is a writeable snap context */ | |
61600ef8 | 676 | snapc = page_snap_context(page); |
d37b1d99 | 677 | if (!snapc) { |
1d3576fd | 678 | dout("writepage %p page %p not dirty?\n", inode, page); |
43986881 | 679 | return 0; |
1d3576fd | 680 | } |
05455e11 | 681 | oldest = get_oldest_context(inode, &ceph_wbc, snapc); |
6298a337 | 682 | if (snapc->seq > oldest->seq) { |
1d3576fd | 683 | dout("writepage %p page %p snapc %p not writeable - noop\n", |
61600ef8 | 684 | inode, page, snapc); |
1d3576fd | 685 | /* we should only noop if called by kswapd */ |
fa71fefb | 686 | WARN_ON(!(current->flags & PF_MEMALLOC)); |
6298a337 | 687 | ceph_put_snap_context(oldest); |
fa71fefb | 688 | redirty_page_for_writepage(wbc, page); |
43986881 | 689 | return 0; |
1d3576fd | 690 | } |
6298a337 | 691 | ceph_put_snap_context(oldest); |
1d3576fd SW |
692 | |
693 | /* is this a partial page at end of file? */ | |
1f934b00 YZ |
694 | if (page_off >= ceph_wbc.i_size) { |
695 | dout("%p page eof %llu\n", page, ceph_wbc.i_size); | |
05455e11 | 696 | page->mapping->a_ops->invalidatepage(page, 0, PAGE_SIZE); |
43986881 | 697 | return 0; |
fc2744aa | 698 | } |
43986881 | 699 | |
1f934b00 YZ |
700 | if (ceph_wbc.i_size < page_off + len) |
701 | len = ceph_wbc.i_size - page_off; | |
1d3576fd | 702 | |
1c0a9c2d YZ |
703 | dout("writepage %p page %p index %lu on %llu~%u snapc %p seq %lld\n", |
704 | inode, page, page->index, page_off, len, snapc, snapc->seq); | |
1d3576fd | 705 | |
314c4737 | 706 | if (atomic_long_inc_return(&fsc->writeback_count) > |
3d14c5d2 | 707 | CONGESTION_ON_THRESH(fsc->mount_options->congestion_kb)) |
09dc9fc2 | 708 | set_bdi_congested(inode_to_bdi(inode), BLK_RW_ASYNC); |
2baba250 | 709 | |
1d3576fd | 710 | set_page_writeback(page); |
5107d7d5 | 711 | err = ceph_sync_writepages(fsc, ceph_vino(inode), |
1f934b00 YZ |
712 | &ci->i_layout, snapc, page_off, len, |
713 | ceph_wbc.truncate_seq, | |
714 | ceph_wbc.truncate_size, | |
fac02ddf | 715 | &inode->i_mtime, &page, 1); |
1d3576fd | 716 | if (err < 0) { |
ad15ec06 YZ |
717 | struct writeback_control tmp_wbc; |
718 | if (!wbc) | |
719 | wbc = &tmp_wbc; | |
720 | if (err == -ERESTARTSYS) { | |
721 | /* killed by SIGKILL */ | |
722 | dout("writepage interrupted page %p\n", page); | |
723 | redirty_page_for_writepage(wbc, page); | |
724 | end_page_writeback(page); | |
43986881 | 725 | return err; |
ad15ec06 | 726 | } |
131d7eb4 YZ |
727 | if (err == -EBLACKLISTED) |
728 | fsc->blacklisted = true; | |
ad15ec06 YZ |
729 | dout("writepage setting page/mapping error %d %p\n", |
730 | err, page); | |
1d3576fd | 731 | mapping_set_error(&inode->i_data, err); |
ad15ec06 | 732 | wbc->pages_skipped++; |
1d3576fd SW |
733 | } else { |
734 | dout("writepage cleaned page %p\n", page); | |
735 | err = 0; /* vfs expects us to return 0 */ | |
736 | } | |
737 | page->private = 0; | |
738 | ClearPagePrivate(page); | |
739 | end_page_writeback(page); | |
740 | ceph_put_wrbuffer_cap_refs(ci, 1, snapc); | |
6298a337 | 741 | ceph_put_snap_context(snapc); /* page's reference */ |
314c4737 YZ |
742 | |
743 | if (atomic_long_dec_return(&fsc->writeback_count) < | |
744 | CONGESTION_OFF_THRESH(fsc->mount_options->congestion_kb)) | |
745 | clear_bdi_congested(inode_to_bdi(inode), BLK_RW_ASYNC); | |
746 | ||
1d3576fd SW |
747 | return err; |
748 | } | |
749 | ||
750 | static int ceph_writepage(struct page *page, struct writeback_control *wbc) | |
751 | { | |
dbd646a8 YS |
752 | int err; |
753 | struct inode *inode = page->mapping->host; | |
754 | BUG_ON(!inode); | |
70b666c3 | 755 | ihold(inode); |
dbd646a8 | 756 | err = writepage_nounlock(page, wbc); |
ad15ec06 YZ |
757 | if (err == -ERESTARTSYS) { |
758 | /* direct memory reclaimer was killed by SIGKILL. return 0 | |
759 | * to prevent caller from setting mapping/page error */ | |
760 | err = 0; | |
761 | } | |
1d3576fd | 762 | unlock_page(page); |
dbd646a8 | 763 | iput(inode); |
1d3576fd SW |
764 | return err; |
765 | } | |
766 | ||
1d3576fd SW |
767 | /* |
768 | * async writeback completion handler. | |
769 | * | |
770 | * If we get an error, set the mapping error bit, but not the individual | |
771 | * page error bits. | |
772 | */ | |
85e084fe | 773 | static void writepages_finish(struct ceph_osd_request *req) |
1d3576fd SW |
774 | { |
775 | struct inode *inode = req->r_inode; | |
1d3576fd | 776 | struct ceph_inode_info *ci = ceph_inode(inode); |
87060c10 | 777 | struct ceph_osd_data *osd_data; |
1d3576fd | 778 | struct page *page; |
5b64640c YZ |
779 | int num_pages, total_pages = 0; |
780 | int i, j; | |
781 | int rc = req->r_result; | |
1d3576fd SW |
782 | struct ceph_snap_context *snapc = req->r_snapc; |
783 | struct address_space *mapping = inode->i_mapping; | |
3d14c5d2 | 784 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
5b64640c | 785 | bool remove_page; |
1d3576fd | 786 | |
5b64640c | 787 | dout("writepages_finish %p rc %d\n", inode, rc); |
26544c62 | 788 | if (rc < 0) { |
1d3576fd | 789 | mapping_set_error(mapping, rc); |
26544c62 | 790 | ceph_set_error_write(ci); |
131d7eb4 YZ |
791 | if (rc == -EBLACKLISTED) |
792 | fsc->blacklisted = true; | |
26544c62 JL |
793 | } else { |
794 | ceph_clear_error_write(ci); | |
795 | } | |
5b64640c YZ |
796 | |
797 | /* | |
798 | * We lost the cache cap, need to truncate the page before | |
799 | * it is unlocked, otherwise we'd truncate it later in the | |
800 | * page truncation thread, possibly losing some data that | |
801 | * raced its way in | |
802 | */ | |
803 | remove_page = !(ceph_caps_issued(ci) & | |
804 | (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)); | |
1d3576fd SW |
805 | |
806 | /* clean all pages */ | |
5b64640c YZ |
807 | for (i = 0; i < req->r_num_ops; i++) { |
808 | if (req->r_ops[i].op != CEPH_OSD_OP_WRITE) | |
809 | break; | |
e63dc5c7 | 810 | |
5b64640c YZ |
811 | osd_data = osd_req_op_extent_osd_data(req, i); |
812 | BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGES); | |
813 | num_pages = calc_pages_for((u64)osd_data->alignment, | |
814 | (u64)osd_data->length); | |
815 | total_pages += num_pages; | |
816 | for (j = 0; j < num_pages; j++) { | |
817 | page = osd_data->pages[j]; | |
818 | BUG_ON(!page); | |
819 | WARN_ON(!PageUptodate(page)); | |
820 | ||
821 | if (atomic_long_dec_return(&fsc->writeback_count) < | |
822 | CONGESTION_OFF_THRESH( | |
823 | fsc->mount_options->congestion_kb)) | |
09dc9fc2 | 824 | clear_bdi_congested(inode_to_bdi(inode), |
5b64640c YZ |
825 | BLK_RW_ASYNC); |
826 | ||
827 | ceph_put_snap_context(page_snap_context(page)); | |
828 | page->private = 0; | |
829 | ClearPagePrivate(page); | |
830 | dout("unlocking %p\n", page); | |
831 | end_page_writeback(page); | |
832 | ||
833 | if (remove_page) | |
834 | generic_error_remove_page(inode->i_mapping, | |
835 | page); | |
836 | ||
837 | unlock_page(page); | |
838 | } | |
839 | dout("writepages_finish %p wrote %llu bytes cleaned %d pages\n", | |
840 | inode, osd_data->length, rc >= 0 ? num_pages : 0); | |
e63dc5c7 | 841 | |
96ac9158 | 842 | release_pages(osd_data->pages, num_pages); |
1d3576fd | 843 | } |
1d3576fd | 844 | |
5b64640c YZ |
845 | ceph_put_wrbuffer_cap_refs(ci, total_pages, snapc); |
846 | ||
847 | osd_data = osd_req_op_extent_osd_data(req, 0); | |
87060c10 AE |
848 | if (osd_data->pages_from_pool) |
849 | mempool_free(osd_data->pages, | |
640ef79d | 850 | ceph_sb_to_client(inode->i_sb)->wb_pagevec_pool); |
1d3576fd | 851 | else |
87060c10 | 852 | kfree(osd_data->pages); |
1d3576fd SW |
853 | ceph_osdc_put_request(req); |
854 | } | |
855 | ||
1d3576fd SW |
856 | /* |
857 | * initiate async writeback | |
858 | */ | |
859 | static int ceph_writepages_start(struct address_space *mapping, | |
860 | struct writeback_control *wbc) | |
861 | { | |
862 | struct inode *inode = mapping->host; | |
1d3576fd | 863 | struct ceph_inode_info *ci = ceph_inode(inode); |
fc2744aa YZ |
864 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
865 | struct ceph_vino vino = ceph_vino(inode); | |
2a2d927e | 866 | pgoff_t index, start_index, end = -1; |
80e755fe | 867 | struct ceph_snap_context *snapc = NULL, *last_snapc = NULL, *pgsnapc; |
1d3576fd | 868 | struct pagevec pvec; |
1d3576fd | 869 | int rc = 0; |
93407472 | 870 | unsigned int wsize = i_blocksize(inode); |
1d3576fd | 871 | struct ceph_osd_request *req = NULL; |
1f934b00 | 872 | struct ceph_writeback_ctl ceph_wbc; |
590e9d98 | 873 | bool should_loop, range_whole = false; |
af9cc401 | 874 | bool done = false; |
1d3576fd | 875 | |
3fb99d48 | 876 | dout("writepages_start %p (mode=%s)\n", inode, |
1d3576fd SW |
877 | wbc->sync_mode == WB_SYNC_NONE ? "NONE" : |
878 | (wbc->sync_mode == WB_SYNC_ALL ? "ALL" : "HOLD")); | |
879 | ||
52953d55 | 880 | if (READ_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) { |
6c93df5d YZ |
881 | if (ci->i_wrbuffer_ref > 0) { |
882 | pr_warn_ratelimited( | |
883 | "writepage_start %p %lld forced umount\n", | |
884 | inode, ceph_ino(inode)); | |
885 | } | |
a341d4df | 886 | mapping_set_error(mapping, -EIO); |
1d3576fd SW |
887 | return -EIO; /* we're in a forced umount, don't write! */ |
888 | } | |
95cca2b4 | 889 | if (fsc->mount_options->wsize < wsize) |
3d14c5d2 | 890 | wsize = fsc->mount_options->wsize; |
1d3576fd | 891 | |
86679820 | 892 | pagevec_init(&pvec); |
1d3576fd | 893 | |
590e9d98 | 894 | start_index = wbc->range_cyclic ? mapping->writeback_index : 0; |
2a2d927e | 895 | index = start_index; |
1d3576fd SW |
896 | |
897 | retry: | |
898 | /* find oldest snap context with dirty data */ | |
05455e11 | 899 | snapc = get_oldest_context(inode, &ceph_wbc, NULL); |
1d3576fd SW |
900 | if (!snapc) { |
901 | /* hmm, why does writepages get called when there | |
902 | is no dirty data? */ | |
903 | dout(" no snap context with dirty data?\n"); | |
904 | goto out; | |
905 | } | |
906 | dout(" oldest snapc is %p seq %lld (%d snaps)\n", | |
907 | snapc, snapc->seq, snapc->num_snaps); | |
fc2744aa | 908 | |
2a2d927e YZ |
909 | should_loop = false; |
910 | if (ceph_wbc.head_snapc && snapc != last_snapc) { | |
911 | /* where to start/end? */ | |
912 | if (wbc->range_cyclic) { | |
913 | index = start_index; | |
914 | end = -1; | |
915 | if (index > 0) | |
916 | should_loop = true; | |
917 | dout(" cyclic, start at %lu\n", index); | |
918 | } else { | |
919 | index = wbc->range_start >> PAGE_SHIFT; | |
920 | end = wbc->range_end >> PAGE_SHIFT; | |
921 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) | |
922 | range_whole = true; | |
923 | dout(" not cyclic, %lu to %lu\n", index, end); | |
924 | } | |
925 | } else if (!ceph_wbc.head_snapc) { | |
926 | /* Do not respect wbc->range_{start,end}. Dirty pages | |
927 | * in that range can be associated with newer snapc. | |
928 | * They are not writeable until we write all dirty pages | |
929 | * associated with 'snapc' get written */ | |
1582af2e | 930 | if (index > 0) |
2a2d927e YZ |
931 | should_loop = true; |
932 | dout(" non-head snapc, range whole\n"); | |
1d3576fd | 933 | } |
2a2d927e YZ |
934 | |
935 | ceph_put_snap_context(last_snapc); | |
1d3576fd SW |
936 | last_snapc = snapc; |
937 | ||
af9cc401 | 938 | while (!done && index <= end) { |
5b64640c | 939 | int num_ops = 0, op_idx; |
0e5ecac7 | 940 | unsigned i, pvec_pages, max_pages, locked_pages = 0; |
5b64640c | 941 | struct page **pages = NULL, **data_pages; |
e5975c7c | 942 | mempool_t *pool = NULL; /* Becomes non-null if mempool used */ |
1d3576fd | 943 | struct page *page; |
0e5ecac7 | 944 | pgoff_t strip_unit_end = 0; |
5b64640c | 945 | u64 offset = 0, len = 0; |
1d3576fd | 946 | |
0e5ecac7 | 947 | max_pages = wsize >> PAGE_SHIFT; |
1d3576fd SW |
948 | |
949 | get_more_pages: | |
4be90299 | 950 | pvec_pages = pagevec_lookup_range_nr_tag(&pvec, mapping, &index, |
0ed75fc8 | 951 | end, PAGECACHE_TAG_DIRTY, |
4be90299 | 952 | max_pages - locked_pages); |
0ed75fc8 | 953 | dout("pagevec_lookup_range_tag got %d\n", pvec_pages); |
1d3576fd SW |
954 | if (!pvec_pages && !locked_pages) |
955 | break; | |
956 | for (i = 0; i < pvec_pages && locked_pages < max_pages; i++) { | |
957 | page = pvec.pages[i]; | |
958 | dout("? %p idx %lu\n", page, page->index); | |
959 | if (locked_pages == 0) | |
960 | lock_page(page); /* first page */ | |
961 | else if (!trylock_page(page)) | |
962 | break; | |
963 | ||
964 | /* only dirty pages, or our accounting breaks */ | |
965 | if (unlikely(!PageDirty(page)) || | |
966 | unlikely(page->mapping != mapping)) { | |
967 | dout("!dirty or !mapping %p\n", page); | |
968 | unlock_page(page); | |
0713e5f2 | 969 | continue; |
1d3576fd | 970 | } |
af9cc401 YZ |
971 | /* only if matching snap context */ |
972 | pgsnapc = page_snap_context(page); | |
973 | if (pgsnapc != snapc) { | |
974 | dout("page snapc %p %lld != oldest %p %lld\n", | |
975 | pgsnapc, pgsnapc->seq, snapc, snapc->seq); | |
1582af2e YZ |
976 | if (!should_loop && |
977 | !ceph_wbc.head_snapc && | |
978 | wbc->sync_mode != WB_SYNC_NONE) | |
979 | should_loop = true; | |
1d3576fd | 980 | unlock_page(page); |
af9cc401 | 981 | continue; |
1d3576fd | 982 | } |
1f934b00 YZ |
983 | if (page_offset(page) >= ceph_wbc.i_size) { |
984 | dout("%p page eof %llu\n", | |
985 | page, ceph_wbc.i_size); | |
c95f1c5f EC |
986 | if ((ceph_wbc.size_stable || |
987 | page_offset(page) >= i_size_read(inode)) && | |
988 | clear_page_dirty_for_io(page)) | |
af9cc401 YZ |
989 | mapping->a_ops->invalidatepage(page, |
990 | 0, PAGE_SIZE); | |
991 | unlock_page(page); | |
992 | continue; | |
993 | } | |
994 | if (strip_unit_end && (page->index > strip_unit_end)) { | |
995 | dout("end of strip unit %p\n", page); | |
1d3576fd SW |
996 | unlock_page(page); |
997 | break; | |
998 | } | |
999 | if (PageWriteback(page)) { | |
0713e5f2 YZ |
1000 | if (wbc->sync_mode == WB_SYNC_NONE) { |
1001 | dout("%p under writeback\n", page); | |
1002 | unlock_page(page); | |
1003 | continue; | |
1004 | } | |
1005 | dout("waiting on writeback %p\n", page); | |
1006 | wait_on_page_writeback(page); | |
1d3576fd SW |
1007 | } |
1008 | ||
1d3576fd SW |
1009 | if (!clear_page_dirty_for_io(page)) { |
1010 | dout("%p !clear_page_dirty_for_io\n", page); | |
1011 | unlock_page(page); | |
0713e5f2 | 1012 | continue; |
1d3576fd SW |
1013 | } |
1014 | ||
e5975c7c AE |
1015 | /* |
1016 | * We have something to write. If this is | |
1017 | * the first locked page this time through, | |
5b64640c YZ |
1018 | * calculate max possinle write size and |
1019 | * allocate a page array | |
e5975c7c | 1020 | */ |
1d3576fd | 1021 | if (locked_pages == 0) { |
5b64640c YZ |
1022 | u64 objnum; |
1023 | u64 objoff; | |
dccbf080 | 1024 | u32 xlen; |
5b64640c | 1025 | |
1d3576fd | 1026 | /* prepare async write request */ |
e5975c7c | 1027 | offset = (u64)page_offset(page); |
dccbf080 ID |
1028 | ceph_calc_file_object_mapping(&ci->i_layout, |
1029 | offset, wsize, | |
1030 | &objnum, &objoff, | |
1031 | &xlen); | |
1032 | len = xlen; | |
8c71897b | 1033 | |
3fb99d48 | 1034 | num_ops = 1; |
5b64640c | 1035 | strip_unit_end = page->index + |
09cbfeaf | 1036 | ((len - 1) >> PAGE_SHIFT); |
88486957 | 1037 | |
5b64640c | 1038 | BUG_ON(pages); |
88486957 | 1039 | max_pages = calc_pages_for(0, (u64)len); |
6da2ec56 KC |
1040 | pages = kmalloc_array(max_pages, |
1041 | sizeof(*pages), | |
1042 | GFP_NOFS); | |
88486957 AE |
1043 | if (!pages) { |
1044 | pool = fsc->wb_pagevec_pool; | |
88486957 | 1045 | pages = mempool_alloc(pool, GFP_NOFS); |
e5975c7c | 1046 | BUG_ON(!pages); |
88486957 | 1047 | } |
5b64640c YZ |
1048 | |
1049 | len = 0; | |
1050 | } else if (page->index != | |
09cbfeaf | 1051 | (offset + len) >> PAGE_SHIFT) { |
5b64640c YZ |
1052 | if (num_ops >= (pool ? CEPH_OSD_SLAB_OPS : |
1053 | CEPH_OSD_MAX_OPS)) { | |
1054 | redirty_page_for_writepage(wbc, page); | |
1055 | unlock_page(page); | |
1056 | break; | |
1057 | } | |
1058 | ||
1059 | num_ops++; | |
1060 | offset = (u64)page_offset(page); | |
1061 | len = 0; | |
1d3576fd SW |
1062 | } |
1063 | ||
1064 | /* note position of first page in pvec */ | |
1d3576fd SW |
1065 | dout("%p will write page %p idx %lu\n", |
1066 | inode, page, page->index); | |
2baba250 | 1067 | |
5b64640c YZ |
1068 | if (atomic_long_inc_return(&fsc->writeback_count) > |
1069 | CONGESTION_ON_THRESH( | |
3d14c5d2 | 1070 | fsc->mount_options->congestion_kb)) { |
09dc9fc2 | 1071 | set_bdi_congested(inode_to_bdi(inode), |
213c99ee | 1072 | BLK_RW_ASYNC); |
2baba250 YS |
1073 | } |
1074 | ||
0713e5f2 YZ |
1075 | |
1076 | pages[locked_pages++] = page; | |
1077 | pvec.pages[i] = NULL; | |
1078 | ||
09cbfeaf | 1079 | len += PAGE_SIZE; |
1d3576fd SW |
1080 | } |
1081 | ||
1082 | /* did we get anything? */ | |
1083 | if (!locked_pages) | |
1084 | goto release_pvec_pages; | |
1085 | if (i) { | |
0713e5f2 YZ |
1086 | unsigned j, n = 0; |
1087 | /* shift unused page to beginning of pvec */ | |
1088 | for (j = 0; j < pvec_pages; j++) { | |
1089 | if (!pvec.pages[j]) | |
1090 | continue; | |
1091 | if (n < j) | |
1092 | pvec.pages[n] = pvec.pages[j]; | |
1093 | n++; | |
1094 | } | |
1095 | pvec.nr = n; | |
1d3576fd SW |
1096 | |
1097 | if (pvec_pages && i == pvec_pages && | |
1098 | locked_pages < max_pages) { | |
1099 | dout("reached end pvec, trying for more\n"); | |
0713e5f2 | 1100 | pagevec_release(&pvec); |
1d3576fd SW |
1101 | goto get_more_pages; |
1102 | } | |
1d3576fd SW |
1103 | } |
1104 | ||
5b64640c | 1105 | new_request: |
e5975c7c | 1106 | offset = page_offset(pages[0]); |
5b64640c YZ |
1107 | len = wsize; |
1108 | ||
1109 | req = ceph_osdc_new_request(&fsc->client->osdc, | |
1110 | &ci->i_layout, vino, | |
1111 | offset, &len, 0, num_ops, | |
1f934b00 YZ |
1112 | CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE, |
1113 | snapc, ceph_wbc.truncate_seq, | |
1114 | ceph_wbc.truncate_size, false); | |
5b64640c YZ |
1115 | if (IS_ERR(req)) { |
1116 | req = ceph_osdc_new_request(&fsc->client->osdc, | |
1117 | &ci->i_layout, vino, | |
1118 | offset, &len, 0, | |
1119 | min(num_ops, | |
1120 | CEPH_OSD_SLAB_OPS), | |
1121 | CEPH_OSD_OP_WRITE, | |
54ea0046 | 1122 | CEPH_OSD_FLAG_WRITE, |
1f934b00 YZ |
1123 | snapc, ceph_wbc.truncate_seq, |
1124 | ceph_wbc.truncate_size, true); | |
5b64640c | 1125 | BUG_ON(IS_ERR(req)); |
e1966b49 | 1126 | } |
5b64640c | 1127 | BUG_ON(len < page_offset(pages[locked_pages - 1]) + |
09cbfeaf | 1128 | PAGE_SIZE - offset); |
5b64640c YZ |
1129 | |
1130 | req->r_callback = writepages_finish; | |
1131 | req->r_inode = inode; | |
1d3576fd | 1132 | |
5b64640c YZ |
1133 | /* Format the osd request message and submit the write */ |
1134 | len = 0; | |
1135 | data_pages = pages; | |
1136 | op_idx = 0; | |
1137 | for (i = 0; i < locked_pages; i++) { | |
1138 | u64 cur_offset = page_offset(pages[i]); | |
1139 | if (offset + len != cur_offset) { | |
3fb99d48 | 1140 | if (op_idx + 1 == req->r_num_ops) |
5b64640c YZ |
1141 | break; |
1142 | osd_req_op_extent_dup_last(req, op_idx, | |
1143 | cur_offset - offset); | |
1144 | dout("writepages got pages at %llu~%llu\n", | |
1145 | offset, len); | |
1146 | osd_req_op_extent_osd_data_pages(req, op_idx, | |
1147 | data_pages, len, 0, | |
a4ce40a9 | 1148 | !!pool, false); |
5b64640c | 1149 | osd_req_op_extent_update(req, op_idx, len); |
e5975c7c | 1150 | |
5b64640c YZ |
1151 | len = 0; |
1152 | offset = cur_offset; | |
1153 | data_pages = pages + i; | |
1154 | op_idx++; | |
1155 | } | |
1156 | ||
1157 | set_page_writeback(pages[i]); | |
09cbfeaf | 1158 | len += PAGE_SIZE; |
5b64640c YZ |
1159 | } |
1160 | ||
1f934b00 YZ |
1161 | if (ceph_wbc.size_stable) { |
1162 | len = min(len, ceph_wbc.i_size - offset); | |
5b64640c YZ |
1163 | } else if (i == locked_pages) { |
1164 | /* writepages_finish() clears writeback pages | |
1165 | * according to the data length, so make sure | |
1166 | * data length covers all locked pages */ | |
09cbfeaf | 1167 | u64 min_len = len + 1 - PAGE_SIZE; |
1f934b00 YZ |
1168 | len = get_writepages_data_length(inode, pages[i - 1], |
1169 | offset); | |
5b64640c YZ |
1170 | len = max(len, min_len); |
1171 | } | |
1172 | dout("writepages got pages at %llu~%llu\n", offset, len); | |
e5975c7c | 1173 | |
5b64640c YZ |
1174 | osd_req_op_extent_osd_data_pages(req, op_idx, data_pages, len, |
1175 | 0, !!pool, false); | |
1176 | osd_req_op_extent_update(req, op_idx, len); | |
e5975c7c | 1177 | |
5b64640c YZ |
1178 | BUG_ON(op_idx + 1 != req->r_num_ops); |
1179 | ||
1180 | pool = NULL; | |
1181 | if (i < locked_pages) { | |
1182 | BUG_ON(num_ops <= req->r_num_ops); | |
1183 | num_ops -= req->r_num_ops; | |
5b64640c YZ |
1184 | locked_pages -= i; |
1185 | ||
1186 | /* allocate new pages array for next request */ | |
1187 | data_pages = pages; | |
6da2ec56 KC |
1188 | pages = kmalloc_array(locked_pages, sizeof(*pages), |
1189 | GFP_NOFS); | |
5b64640c YZ |
1190 | if (!pages) { |
1191 | pool = fsc->wb_pagevec_pool; | |
1192 | pages = mempool_alloc(pool, GFP_NOFS); | |
1193 | BUG_ON(!pages); | |
1194 | } | |
1195 | memcpy(pages, data_pages + i, | |
1196 | locked_pages * sizeof(*pages)); | |
1197 | memset(data_pages + i, 0, | |
1198 | locked_pages * sizeof(*pages)); | |
1199 | } else { | |
1200 | BUG_ON(num_ops != req->r_num_ops); | |
1201 | index = pages[i - 1]->index + 1; | |
1202 | /* request message now owns the pages array */ | |
1203 | pages = NULL; | |
1204 | } | |
e5975c7c | 1205 | |
fac02ddf | 1206 | req->r_mtime = inode->i_mtime; |
9d6fcb08 SW |
1207 | rc = ceph_osdc_start_request(&fsc->client->osdc, req, true); |
1208 | BUG_ON(rc); | |
1d3576fd SW |
1209 | req = NULL; |
1210 | ||
5b64640c YZ |
1211 | wbc->nr_to_write -= i; |
1212 | if (pages) | |
1213 | goto new_request; | |
1214 | ||
2a2d927e YZ |
1215 | /* |
1216 | * We stop writing back only if we are not doing | |
1217 | * integrity sync. In case of integrity sync we have to | |
1218 | * keep going until we have written all the pages | |
1219 | * we tagged for writeback prior to entering this loop. | |
1220 | */ | |
1221 | if (wbc->nr_to_write <= 0 && wbc->sync_mode == WB_SYNC_NONE) | |
af9cc401 | 1222 | done = true; |
1d3576fd SW |
1223 | |
1224 | release_pvec_pages: | |
1225 | dout("pagevec_release on %d pages (%p)\n", (int)pvec.nr, | |
1226 | pvec.nr ? pvec.pages[0] : NULL); | |
1227 | pagevec_release(&pvec); | |
1d3576fd SW |
1228 | } |
1229 | ||
1230 | if (should_loop && !done) { | |
1231 | /* more to do; loop back to beginning of file */ | |
1232 | dout("writepages looping back to beginning of file\n"); | |
2a2d927e | 1233 | end = start_index - 1; /* OK even when start_index == 0 */ |
f275635e YZ |
1234 | |
1235 | /* to write dirty pages associated with next snapc, | |
1236 | * we need to wait until current writes complete */ | |
1237 | if (wbc->sync_mode != WB_SYNC_NONE && | |
1238 | start_index == 0 && /* all dirty pages were checked */ | |
1239 | !ceph_wbc.head_snapc) { | |
1240 | struct page *page; | |
1241 | unsigned i, nr; | |
1242 | index = 0; | |
1243 | while ((index <= end) && | |
1244 | (nr = pagevec_lookup_tag(&pvec, mapping, &index, | |
67fd707f | 1245 | PAGECACHE_TAG_WRITEBACK))) { |
f275635e YZ |
1246 | for (i = 0; i < nr; i++) { |
1247 | page = pvec.pages[i]; | |
1248 | if (page_snap_context(page) != snapc) | |
1249 | continue; | |
1250 | wait_on_page_writeback(page); | |
1251 | } | |
1252 | pagevec_release(&pvec); | |
1253 | cond_resched(); | |
1254 | } | |
1255 | } | |
1256 | ||
2a2d927e | 1257 | start_index = 0; |
1d3576fd SW |
1258 | index = 0; |
1259 | goto retry; | |
1260 | } | |
1261 | ||
1262 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1263 | mapping->writeback_index = index; | |
1264 | ||
1265 | out: | |
3ed97d63 | 1266 | ceph_osdc_put_request(req); |
2a2d927e YZ |
1267 | ceph_put_snap_context(last_snapc); |
1268 | dout("writepages dend - startone, rc = %d\n", rc); | |
1d3576fd SW |
1269 | return rc; |
1270 | } | |
1271 | ||
1272 | ||
1273 | ||
1274 | /* | |
1275 | * See if a given @snapc is either writeable, or already written. | |
1276 | */ | |
1277 | static int context_is_writeable_or_written(struct inode *inode, | |
1278 | struct ceph_snap_context *snapc) | |
1279 | { | |
05455e11 | 1280 | struct ceph_snap_context *oldest = get_oldest_context(inode, NULL, NULL); |
6298a337 SW |
1281 | int ret = !oldest || snapc->seq <= oldest->seq; |
1282 | ||
1283 | ceph_put_snap_context(oldest); | |
1284 | return ret; | |
1d3576fd SW |
1285 | } |
1286 | ||
1287 | /* | |
1288 | * We are only allowed to write into/dirty the page if the page is | |
1289 | * clean, or already dirty within the same snap context. | |
8f883c24 SW |
1290 | * |
1291 | * called with page locked. | |
1292 | * return success with page locked, | |
1293 | * or any failure (incl -EAGAIN) with page unlocked. | |
1d3576fd | 1294 | */ |
4af6b225 YS |
1295 | static int ceph_update_writeable_page(struct file *file, |
1296 | loff_t pos, unsigned len, | |
1297 | struct page *page) | |
1d3576fd | 1298 | { |
496ad9aa | 1299 | struct inode *inode = file_inode(file); |
6c93df5d | 1300 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
1d3576fd | 1301 | struct ceph_inode_info *ci = ceph_inode(inode); |
09cbfeaf KS |
1302 | loff_t page_off = pos & PAGE_MASK; |
1303 | int pos_in_page = pos & ~PAGE_MASK; | |
1d3576fd SW |
1304 | int end_in_page = pos_in_page + len; |
1305 | loff_t i_size; | |
1d3576fd | 1306 | int r; |
80e755fe | 1307 | struct ceph_snap_context *snapc, *oldest; |
1d3576fd | 1308 | |
52953d55 | 1309 | if (READ_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) { |
6c93df5d YZ |
1310 | dout(" page %p forced umount\n", page); |
1311 | unlock_page(page); | |
1312 | return -EIO; | |
1313 | } | |
1314 | ||
1d3576fd SW |
1315 | retry_locked: |
1316 | /* writepages currently holds page lock, but if we change that later, */ | |
1317 | wait_on_page_writeback(page); | |
1318 | ||
61600ef8 | 1319 | snapc = page_snap_context(page); |
80e755fe | 1320 | if (snapc && snapc != ci->i_head_snapc) { |
1d3576fd SW |
1321 | /* |
1322 | * this page is already dirty in another (older) snap | |
1323 | * context! is it writeable now? | |
1324 | */ | |
05455e11 | 1325 | oldest = get_oldest_context(inode, NULL, NULL); |
80e755fe | 1326 | if (snapc->seq > oldest->seq) { |
6298a337 | 1327 | ceph_put_snap_context(oldest); |
1d3576fd | 1328 | dout(" page %p snapc %p not current or oldest\n", |
6298a337 | 1329 | page, snapc); |
1d3576fd SW |
1330 | /* |
1331 | * queue for writeback, and wait for snapc to | |
1332 | * be writeable or written | |
1333 | */ | |
6298a337 | 1334 | snapc = ceph_get_snap_context(snapc); |
1d3576fd | 1335 | unlock_page(page); |
3c6f6b79 | 1336 | ceph_queue_writeback(inode); |
a78bbd4b | 1337 | r = wait_event_killable(ci->i_cap_wq, |
1d3576fd SW |
1338 | context_is_writeable_or_written(inode, snapc)); |
1339 | ceph_put_snap_context(snapc); | |
8f883c24 SW |
1340 | if (r == -ERESTARTSYS) |
1341 | return r; | |
4af6b225 | 1342 | return -EAGAIN; |
1d3576fd | 1343 | } |
6298a337 | 1344 | ceph_put_snap_context(oldest); |
1d3576fd SW |
1345 | |
1346 | /* yay, writeable, do it now (without dropping page lock) */ | |
1347 | dout(" page %p snapc %p not current, but oldest\n", | |
1348 | page, snapc); | |
1349 | if (!clear_page_dirty_for_io(page)) | |
1350 | goto retry_locked; | |
1351 | r = writepage_nounlock(page, NULL); | |
1352 | if (r < 0) | |
dd2bc473 | 1353 | goto fail_unlock; |
1d3576fd SW |
1354 | goto retry_locked; |
1355 | } | |
1356 | ||
1357 | if (PageUptodate(page)) { | |
1358 | dout(" page %p already uptodate\n", page); | |
1359 | return 0; | |
1360 | } | |
1361 | ||
1362 | /* full page? */ | |
09cbfeaf | 1363 | if (pos_in_page == 0 && len == PAGE_SIZE) |
1d3576fd SW |
1364 | return 0; |
1365 | ||
1366 | /* past end of file? */ | |
99c88e69 | 1367 | i_size = i_size_read(inode); |
1d3576fd | 1368 | |
1d3576fd SW |
1369 | if (page_off >= i_size || |
1370 | (pos_in_page == 0 && (pos+len) >= i_size && | |
09cbfeaf | 1371 | end_in_page - pos_in_page != PAGE_SIZE)) { |
1d3576fd | 1372 | dout(" zeroing %p 0 - %d and %d - %d\n", |
09cbfeaf | 1373 | page, pos_in_page, end_in_page, (int)PAGE_SIZE); |
1d3576fd SW |
1374 | zero_user_segments(page, |
1375 | 0, pos_in_page, | |
09cbfeaf | 1376 | end_in_page, PAGE_SIZE); |
1d3576fd SW |
1377 | return 0; |
1378 | } | |
1379 | ||
1380 | /* we need to read it. */ | |
dd2bc473 YZ |
1381 | r = ceph_do_readpage(file, page); |
1382 | if (r < 0) { | |
1383 | if (r == -EINPROGRESS) | |
1384 | return -EAGAIN; | |
1385 | goto fail_unlock; | |
1386 | } | |
1d3576fd | 1387 | goto retry_locked; |
dd2bc473 | 1388 | fail_unlock: |
1d3576fd SW |
1389 | unlock_page(page); |
1390 | return r; | |
1391 | } | |
1392 | ||
4af6b225 YS |
1393 | /* |
1394 | * We are only allowed to write into/dirty the page if the page is | |
1395 | * clean, or already dirty within the same snap context. | |
1396 | */ | |
1397 | static int ceph_write_begin(struct file *file, struct address_space *mapping, | |
1398 | loff_t pos, unsigned len, unsigned flags, | |
1399 | struct page **pagep, void **fsdata) | |
1400 | { | |
496ad9aa | 1401 | struct inode *inode = file_inode(file); |
4af6b225 | 1402 | struct page *page; |
09cbfeaf | 1403 | pgoff_t index = pos >> PAGE_SHIFT; |
7971bd92 | 1404 | int r; |
4af6b225 YS |
1405 | |
1406 | do { | |
8f883c24 | 1407 | /* get a page */ |
4af6b225 | 1408 | page = grab_cache_page_write_begin(mapping, index, 0); |
7971bd92 SW |
1409 | if (!page) |
1410 | return -ENOMEM; | |
4af6b225 YS |
1411 | |
1412 | dout("write_begin file %p inode %p page %p %d~%d\n", file, | |
213c99ee | 1413 | inode, page, (int)pos, (int)len); |
4af6b225 YS |
1414 | |
1415 | r = ceph_update_writeable_page(file, pos, len, page); | |
c1d00b2d | 1416 | if (r < 0) |
09cbfeaf | 1417 | put_page(page); |
c1d00b2d TK |
1418 | else |
1419 | *pagep = page; | |
4af6b225 YS |
1420 | } while (r == -EAGAIN); |
1421 | ||
1422 | return r; | |
1423 | } | |
1424 | ||
1d3576fd SW |
1425 | /* |
1426 | * we don't do anything in here that simple_write_end doesn't do | |
5dda377c | 1427 | * except adjust dirty page accounting |
1d3576fd SW |
1428 | */ |
1429 | static int ceph_write_end(struct file *file, struct address_space *mapping, | |
1430 | loff_t pos, unsigned len, unsigned copied, | |
1431 | struct page *page, void *fsdata) | |
1432 | { | |
496ad9aa | 1433 | struct inode *inode = file_inode(file); |
efb0ca76 | 1434 | bool check_cap = false; |
1d3576fd SW |
1435 | |
1436 | dout("write_end file %p inode %p page %p %d~%d (%d)\n", file, | |
1437 | inode, page, (int)pos, (int)copied, (int)len); | |
1438 | ||
1439 | /* zero the stale part of the page if we did a short copy */ | |
b9de313c AV |
1440 | if (!PageUptodate(page)) { |
1441 | if (copied < len) { | |
1442 | copied = 0; | |
1443 | goto out; | |
1444 | } | |
1445 | SetPageUptodate(page); | |
1446 | } | |
1d3576fd SW |
1447 | |
1448 | /* did file size increase? */ | |
99c88e69 | 1449 | if (pos+copied > i_size_read(inode)) |
1d3576fd SW |
1450 | check_cap = ceph_inode_set_size(inode, pos+copied); |
1451 | ||
1d3576fd SW |
1452 | set_page_dirty(page); |
1453 | ||
b9de313c | 1454 | out: |
1d3576fd | 1455 | unlock_page(page); |
09cbfeaf | 1456 | put_page(page); |
1d3576fd SW |
1457 | |
1458 | if (check_cap) | |
1459 | ceph_check_caps(ceph_inode(inode), CHECK_CAPS_AUTHONLY, NULL); | |
1460 | ||
1461 | return copied; | |
1462 | } | |
1463 | ||
1464 | /* | |
1465 | * we set .direct_IO to indicate direct io is supported, but since we | |
1466 | * intercept O_DIRECT reads and writes early, this function should | |
1467 | * never get called. | |
1468 | */ | |
c8b8e32d | 1469 | static ssize_t ceph_direct_io(struct kiocb *iocb, struct iov_iter *iter) |
1d3576fd SW |
1470 | { |
1471 | WARN_ON(1); | |
1472 | return -EINVAL; | |
1473 | } | |
1474 | ||
1475 | const struct address_space_operations ceph_aops = { | |
1476 | .readpage = ceph_readpage, | |
1477 | .readpages = ceph_readpages, | |
1478 | .writepage = ceph_writepage, | |
1479 | .writepages = ceph_writepages_start, | |
1480 | .write_begin = ceph_write_begin, | |
1481 | .write_end = ceph_write_end, | |
1482 | .set_page_dirty = ceph_set_page_dirty, | |
1483 | .invalidatepage = ceph_invalidatepage, | |
1484 | .releasepage = ceph_releasepage, | |
1485 | .direct_IO = ceph_direct_io, | |
1486 | }; | |
1487 | ||
4f7e89f6 YZ |
1488 | static void ceph_block_sigs(sigset_t *oldset) |
1489 | { | |
1490 | sigset_t mask; | |
1491 | siginitsetinv(&mask, sigmask(SIGKILL)); | |
1492 | sigprocmask(SIG_BLOCK, &mask, oldset); | |
1493 | } | |
1494 | ||
1495 | static void ceph_restore_sigs(sigset_t *oldset) | |
1496 | { | |
1497 | sigprocmask(SIG_SETMASK, oldset, NULL); | |
1498 | } | |
1d3576fd SW |
1499 | |
1500 | /* | |
1501 | * vm ops | |
1502 | */ | |
24499847 | 1503 | static vm_fault_t ceph_filemap_fault(struct vm_fault *vmf) |
61f68816 | 1504 | { |
11bac800 | 1505 | struct vm_area_struct *vma = vmf->vma; |
61f68816 YZ |
1506 | struct inode *inode = file_inode(vma->vm_file); |
1507 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1508 | struct ceph_file_info *fi = vma->vm_file->private_data; | |
3738daa6 | 1509 | struct page *pinned_page = NULL; |
09cbfeaf | 1510 | loff_t off = vmf->pgoff << PAGE_SHIFT; |
24499847 | 1511 | int want, got, err; |
4f7e89f6 | 1512 | sigset_t oldset; |
24499847 | 1513 | vm_fault_t ret = VM_FAULT_SIGBUS; |
4f7e89f6 YZ |
1514 | |
1515 | ceph_block_sigs(&oldset); | |
61f68816 YZ |
1516 | |
1517 | dout("filemap_fault %p %llx.%llx %llu~%zd trying to get caps\n", | |
09cbfeaf | 1518 | inode, ceph_vinop(inode), off, (size_t)PAGE_SIZE); |
61f68816 YZ |
1519 | if (fi->fmode & CEPH_FILE_MODE_LAZY) |
1520 | want = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO; | |
1521 | else | |
1522 | want = CEPH_CAP_FILE_CACHE; | |
4f7e89f6 YZ |
1523 | |
1524 | got = 0; | |
5e3ded1b YZ |
1525 | err = ceph_get_caps(vma->vm_file, CEPH_CAP_FILE_RD, want, -1, |
1526 | &got, &pinned_page); | |
24499847 | 1527 | if (err < 0) |
4f7e89f6 | 1528 | goto out_restore; |
6ce026e4 | 1529 | |
61f68816 | 1530 | dout("filemap_fault %p %llu~%zd got cap refs on %s\n", |
09cbfeaf | 1531 | inode, off, (size_t)PAGE_SIZE, ceph_cap_string(got)); |
61f68816 | 1532 | |
83701246 | 1533 | if ((got & (CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO)) || |
2b1ac852 | 1534 | ci->i_inline_version == CEPH_INLINE_NONE) { |
5d988308 YZ |
1535 | CEPH_DEFINE_RW_CONTEXT(rw_ctx, got); |
1536 | ceph_add_rw_context(fi, &rw_ctx); | |
11bac800 | 1537 | ret = filemap_fault(vmf); |
5d988308 | 1538 | ceph_del_rw_context(fi, &rw_ctx); |
24499847 SJ |
1539 | dout("filemap_fault %p %llu~%zd drop cap refs %s ret %x\n", |
1540 | inode, off, (size_t)PAGE_SIZE, | |
1541 | ceph_cap_string(got), ret); | |
2b1ac852 | 1542 | } else |
24499847 | 1543 | err = -EAGAIN; |
61f68816 | 1544 | |
3738daa6 | 1545 | if (pinned_page) |
09cbfeaf | 1546 | put_page(pinned_page); |
61f68816 YZ |
1547 | ceph_put_cap_refs(ci, got); |
1548 | ||
24499847 | 1549 | if (err != -EAGAIN) |
4f7e89f6 | 1550 | goto out_restore; |
83701246 YZ |
1551 | |
1552 | /* read inline data */ | |
09cbfeaf | 1553 | if (off >= PAGE_SIZE) { |
83701246 YZ |
1554 | /* does not support inline data > PAGE_SIZE */ |
1555 | ret = VM_FAULT_SIGBUS; | |
1556 | } else { | |
83701246 YZ |
1557 | struct address_space *mapping = inode->i_mapping; |
1558 | struct page *page = find_or_create_page(mapping, 0, | |
c62d2555 MH |
1559 | mapping_gfp_constraint(mapping, |
1560 | ~__GFP_FS)); | |
83701246 YZ |
1561 | if (!page) { |
1562 | ret = VM_FAULT_OOM; | |
4f7e89f6 | 1563 | goto out_inline; |
83701246 | 1564 | } |
24499847 | 1565 | err = __ceph_do_getattr(inode, page, |
83701246 | 1566 | CEPH_STAT_CAP_INLINE_DATA, true); |
24499847 | 1567 | if (err < 0 || off >= i_size_read(inode)) { |
83701246 | 1568 | unlock_page(page); |
09cbfeaf | 1569 | put_page(page); |
c64a2b05 | 1570 | ret = vmf_error(err); |
4f7e89f6 | 1571 | goto out_inline; |
83701246 | 1572 | } |
24499847 SJ |
1573 | if (err < PAGE_SIZE) |
1574 | zero_user_segment(page, err, PAGE_SIZE); | |
83701246 YZ |
1575 | else |
1576 | flush_dcache_page(page); | |
1577 | SetPageUptodate(page); | |
1578 | vmf->page = page; | |
1579 | ret = VM_FAULT_MAJOR | VM_FAULT_LOCKED; | |
4f7e89f6 | 1580 | out_inline: |
24499847 | 1581 | dout("filemap_fault %p %llu~%zd read inline data ret %x\n", |
4f7e89f6 | 1582 | inode, off, (size_t)PAGE_SIZE, ret); |
83701246 | 1583 | } |
4f7e89f6 YZ |
1584 | out_restore: |
1585 | ceph_restore_sigs(&oldset); | |
24499847 SJ |
1586 | if (err < 0) |
1587 | ret = vmf_error(err); | |
6ce026e4 | 1588 | |
61f68816 YZ |
1589 | return ret; |
1590 | } | |
1d3576fd SW |
1591 | |
1592 | /* | |
1593 | * Reuse write_begin here for simplicity. | |
1594 | */ | |
24499847 | 1595 | static vm_fault_t ceph_page_mkwrite(struct vm_fault *vmf) |
1d3576fd | 1596 | { |
11bac800 | 1597 | struct vm_area_struct *vma = vmf->vma; |
496ad9aa | 1598 | struct inode *inode = file_inode(vma->vm_file); |
61f68816 YZ |
1599 | struct ceph_inode_info *ci = ceph_inode(inode); |
1600 | struct ceph_file_info *fi = vma->vm_file->private_data; | |
f66fd9f0 | 1601 | struct ceph_cap_flush *prealloc_cf; |
61f68816 | 1602 | struct page *page = vmf->page; |
6285bc23 | 1603 | loff_t off = page_offset(page); |
61f68816 YZ |
1604 | loff_t size = i_size_read(inode); |
1605 | size_t len; | |
24499847 | 1606 | int want, got, err; |
4f7e89f6 | 1607 | sigset_t oldset; |
24499847 | 1608 | vm_fault_t ret = VM_FAULT_SIGBUS; |
3ca9c3bd | 1609 | |
f66fd9f0 YZ |
1610 | prealloc_cf = ceph_alloc_cap_flush(); |
1611 | if (!prealloc_cf) | |
6ce026e4 | 1612 | return VM_FAULT_OOM; |
f66fd9f0 | 1613 | |
249c1df5 | 1614 | sb_start_pagefault(inode->i_sb); |
4f7e89f6 | 1615 | ceph_block_sigs(&oldset); |
f66fd9f0 | 1616 | |
28127bdd YZ |
1617 | if (ci->i_inline_version != CEPH_INLINE_NONE) { |
1618 | struct page *locked_page = NULL; | |
1619 | if (off == 0) { | |
1620 | lock_page(page); | |
1621 | locked_page = page; | |
1622 | } | |
24499847 | 1623 | err = ceph_uninline_data(vma->vm_file, locked_page); |
28127bdd YZ |
1624 | if (locked_page) |
1625 | unlock_page(locked_page); | |
24499847 | 1626 | if (err < 0) |
f66fd9f0 | 1627 | goto out_free; |
28127bdd YZ |
1628 | } |
1629 | ||
09cbfeaf KS |
1630 | if (off + PAGE_SIZE <= size) |
1631 | len = PAGE_SIZE; | |
1d3576fd | 1632 | else |
09cbfeaf | 1633 | len = size & ~PAGE_MASK; |
1d3576fd | 1634 | |
61f68816 YZ |
1635 | dout("page_mkwrite %p %llx.%llx %llu~%zd getting caps i_size %llu\n", |
1636 | inode, ceph_vinop(inode), off, len, size); | |
1637 | if (fi->fmode & CEPH_FILE_MODE_LAZY) | |
1638 | want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO; | |
1639 | else | |
1640 | want = CEPH_CAP_FILE_BUFFER; | |
4f7e89f6 YZ |
1641 | |
1642 | got = 0; | |
5e3ded1b | 1643 | err = ceph_get_caps(vma->vm_file, CEPH_CAP_FILE_WR, want, off + len, |
4f7e89f6 | 1644 | &got, NULL); |
24499847 | 1645 | if (err < 0) |
4f7e89f6 | 1646 | goto out_free; |
6ce026e4 | 1647 | |
61f68816 YZ |
1648 | dout("page_mkwrite %p %llu~%zd got cap refs on %s\n", |
1649 | inode, off, len, ceph_cap_string(got)); | |
1650 | ||
1651 | /* Update time before taking page lock */ | |
1652 | file_update_time(vma->vm_file); | |
5c308356 | 1653 | inode_inc_iversion_raw(inode); |
4af6b225 | 1654 | |
f0b33df5 YZ |
1655 | do { |
1656 | lock_page(page); | |
4af6b225 | 1657 | |
cb03c143 | 1658 | if (page_mkwrite_check_truncate(page, inode) < 0) { |
f0b33df5 YZ |
1659 | unlock_page(page); |
1660 | ret = VM_FAULT_NOPAGE; | |
1661 | break; | |
1662 | } | |
1663 | ||
24499847 SJ |
1664 | err = ceph_update_writeable_page(vma->vm_file, off, len, page); |
1665 | if (err >= 0) { | |
f0b33df5 YZ |
1666 | /* success. we'll keep the page locked. */ |
1667 | set_page_dirty(page); | |
1668 | ret = VM_FAULT_LOCKED; | |
1669 | } | |
24499847 | 1670 | } while (err == -EAGAIN); |
4af6b225 | 1671 | |
28127bdd YZ |
1672 | if (ret == VM_FAULT_LOCKED || |
1673 | ci->i_inline_version != CEPH_INLINE_NONE) { | |
61f68816 YZ |
1674 | int dirty; |
1675 | spin_lock(&ci->i_ceph_lock); | |
28127bdd | 1676 | ci->i_inline_version = CEPH_INLINE_NONE; |
f66fd9f0 YZ |
1677 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, |
1678 | &prealloc_cf); | |
61f68816 YZ |
1679 | spin_unlock(&ci->i_ceph_lock); |
1680 | if (dirty) | |
1681 | __mark_inode_dirty(inode, dirty); | |
1682 | } | |
1683 | ||
24499847 | 1684 | dout("page_mkwrite %p %llu~%zd dropping cap refs on %s ret %x\n", |
61f68816 YZ |
1685 | inode, off, len, ceph_cap_string(got), ret); |
1686 | ceph_put_cap_refs(ci, got); | |
f66fd9f0 | 1687 | out_free: |
4f7e89f6 | 1688 | ceph_restore_sigs(&oldset); |
249c1df5 | 1689 | sb_end_pagefault(inode->i_sb); |
f66fd9f0 | 1690 | ceph_free_cap_flush(prealloc_cf); |
24499847 SJ |
1691 | if (err < 0) |
1692 | ret = vmf_error(err); | |
1d3576fd SW |
1693 | return ret; |
1694 | } | |
1695 | ||
31c542a1 YZ |
1696 | void ceph_fill_inline_data(struct inode *inode, struct page *locked_page, |
1697 | char *data, size_t len) | |
1698 | { | |
1699 | struct address_space *mapping = inode->i_mapping; | |
1700 | struct page *page; | |
1701 | ||
1702 | if (locked_page) { | |
1703 | page = locked_page; | |
1704 | } else { | |
1705 | if (i_size_read(inode) == 0) | |
1706 | return; | |
1707 | page = find_or_create_page(mapping, 0, | |
c62d2555 MH |
1708 | mapping_gfp_constraint(mapping, |
1709 | ~__GFP_FS)); | |
31c542a1 YZ |
1710 | if (!page) |
1711 | return; | |
1712 | if (PageUptodate(page)) { | |
1713 | unlock_page(page); | |
09cbfeaf | 1714 | put_page(page); |
31c542a1 YZ |
1715 | return; |
1716 | } | |
1717 | } | |
1718 | ||
0668ff52 | 1719 | dout("fill_inline_data %p %llx.%llx len %zu locked_page %p\n", |
31c542a1 YZ |
1720 | inode, ceph_vinop(inode), len, locked_page); |
1721 | ||
1722 | if (len > 0) { | |
1723 | void *kaddr = kmap_atomic(page); | |
1724 | memcpy(kaddr, data, len); | |
1725 | kunmap_atomic(kaddr); | |
1726 | } | |
1727 | ||
1728 | if (page != locked_page) { | |
09cbfeaf KS |
1729 | if (len < PAGE_SIZE) |
1730 | zero_user_segment(page, len, PAGE_SIZE); | |
31c542a1 YZ |
1731 | else |
1732 | flush_dcache_page(page); | |
1733 | ||
1734 | SetPageUptodate(page); | |
1735 | unlock_page(page); | |
09cbfeaf | 1736 | put_page(page); |
31c542a1 YZ |
1737 | } |
1738 | } | |
1739 | ||
28127bdd YZ |
1740 | int ceph_uninline_data(struct file *filp, struct page *locked_page) |
1741 | { | |
1742 | struct inode *inode = file_inode(filp); | |
1743 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1744 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); | |
1745 | struct ceph_osd_request *req; | |
1746 | struct page *page = NULL; | |
1747 | u64 len, inline_version; | |
1748 | int err = 0; | |
1749 | bool from_pagecache = false; | |
1750 | ||
1751 | spin_lock(&ci->i_ceph_lock); | |
1752 | inline_version = ci->i_inline_version; | |
1753 | spin_unlock(&ci->i_ceph_lock); | |
1754 | ||
1755 | dout("uninline_data %p %llx.%llx inline_version %llu\n", | |
1756 | inode, ceph_vinop(inode), inline_version); | |
1757 | ||
1758 | if (inline_version == 1 || /* initial version, no data */ | |
1759 | inline_version == CEPH_INLINE_NONE) | |
1760 | goto out; | |
1761 | ||
1762 | if (locked_page) { | |
1763 | page = locked_page; | |
1764 | WARN_ON(!PageUptodate(page)); | |
1765 | } else if (ceph_caps_issued(ci) & | |
1766 | (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) { | |
1767 | page = find_get_page(inode->i_mapping, 0); | |
1768 | if (page) { | |
1769 | if (PageUptodate(page)) { | |
1770 | from_pagecache = true; | |
1771 | lock_page(page); | |
1772 | } else { | |
09cbfeaf | 1773 | put_page(page); |
28127bdd YZ |
1774 | page = NULL; |
1775 | } | |
1776 | } | |
1777 | } | |
1778 | ||
1779 | if (page) { | |
1780 | len = i_size_read(inode); | |
09cbfeaf KS |
1781 | if (len > PAGE_SIZE) |
1782 | len = PAGE_SIZE; | |
28127bdd YZ |
1783 | } else { |
1784 | page = __page_cache_alloc(GFP_NOFS); | |
1785 | if (!page) { | |
1786 | err = -ENOMEM; | |
1787 | goto out; | |
1788 | } | |
1789 | err = __ceph_do_getattr(inode, page, | |
1790 | CEPH_STAT_CAP_INLINE_DATA, true); | |
1791 | if (err < 0) { | |
1792 | /* no inline data */ | |
1793 | if (err == -ENODATA) | |
1794 | err = 0; | |
1795 | goto out; | |
1796 | } | |
1797 | len = err; | |
1798 | } | |
1799 | ||
1800 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
1801 | ceph_vino(inode), 0, &len, 0, 1, | |
54ea0046 | 1802 | CEPH_OSD_OP_CREATE, CEPH_OSD_FLAG_WRITE, |
34b759b4 | 1803 | NULL, 0, 0, false); |
28127bdd YZ |
1804 | if (IS_ERR(req)) { |
1805 | err = PTR_ERR(req); | |
1806 | goto out; | |
1807 | } | |
1808 | ||
fac02ddf | 1809 | req->r_mtime = inode->i_mtime; |
28127bdd YZ |
1810 | err = ceph_osdc_start_request(&fsc->client->osdc, req, false); |
1811 | if (!err) | |
1812 | err = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
1813 | ceph_osdc_put_request(req); | |
1814 | if (err < 0) | |
1815 | goto out; | |
1816 | ||
1817 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
1818 | ceph_vino(inode), 0, &len, 1, 3, | |
54ea0046 | 1819 | CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE, |
34b759b4 ID |
1820 | NULL, ci->i_truncate_seq, |
1821 | ci->i_truncate_size, false); | |
28127bdd YZ |
1822 | if (IS_ERR(req)) { |
1823 | err = PTR_ERR(req); | |
1824 | goto out; | |
1825 | } | |
1826 | ||
1827 | osd_req_op_extent_osd_data_pages(req, 1, &page, len, 0, false, false); | |
1828 | ||
ec137c10 YZ |
1829 | { |
1830 | __le64 xattr_buf = cpu_to_le64(inline_version); | |
1831 | err = osd_req_op_xattr_init(req, 0, CEPH_OSD_OP_CMPXATTR, | |
1832 | "inline_version", &xattr_buf, | |
1833 | sizeof(xattr_buf), | |
1834 | CEPH_OSD_CMPXATTR_OP_GT, | |
1835 | CEPH_OSD_CMPXATTR_MODE_U64); | |
1836 | if (err) | |
1837 | goto out_put; | |
1838 | } | |
1839 | ||
1840 | { | |
1841 | char xattr_buf[32]; | |
1842 | int xattr_len = snprintf(xattr_buf, sizeof(xattr_buf), | |
1843 | "%llu", inline_version); | |
1844 | err = osd_req_op_xattr_init(req, 2, CEPH_OSD_OP_SETXATTR, | |
1845 | "inline_version", | |
1846 | xattr_buf, xattr_len, 0, 0); | |
1847 | if (err) | |
1848 | goto out_put; | |
1849 | } | |
28127bdd | 1850 | |
fac02ddf | 1851 | req->r_mtime = inode->i_mtime; |
28127bdd YZ |
1852 | err = ceph_osdc_start_request(&fsc->client->osdc, req, false); |
1853 | if (!err) | |
1854 | err = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
1855 | out_put: | |
1856 | ceph_osdc_put_request(req); | |
1857 | if (err == -ECANCELED) | |
1858 | err = 0; | |
1859 | out: | |
1860 | if (page && page != locked_page) { | |
1861 | if (from_pagecache) { | |
1862 | unlock_page(page); | |
09cbfeaf | 1863 | put_page(page); |
28127bdd YZ |
1864 | } else |
1865 | __free_pages(page, 0); | |
1866 | } | |
1867 | ||
1868 | dout("uninline_data %p %llx.%llx inline_version %llu = %d\n", | |
1869 | inode, ceph_vinop(inode), inline_version, err); | |
1870 | return err; | |
1871 | } | |
1872 | ||
7cbea8dc | 1873 | static const struct vm_operations_struct ceph_vmops = { |
61f68816 | 1874 | .fault = ceph_filemap_fault, |
1d3576fd SW |
1875 | .page_mkwrite = ceph_page_mkwrite, |
1876 | }; | |
1877 | ||
1878 | int ceph_mmap(struct file *file, struct vm_area_struct *vma) | |
1879 | { | |
1880 | struct address_space *mapping = file->f_mapping; | |
1881 | ||
1882 | if (!mapping->a_ops->readpage) | |
1883 | return -ENOEXEC; | |
1884 | file_accessed(file); | |
1885 | vma->vm_ops = &ceph_vmops; | |
1d3576fd SW |
1886 | return 0; |
1887 | } | |
10183a69 YZ |
1888 | |
1889 | enum { | |
1890 | POOL_READ = 1, | |
1891 | POOL_WRITE = 2, | |
1892 | }; | |
1893 | ||
779fe0fb YZ |
1894 | static int __ceph_pool_perm_get(struct ceph_inode_info *ci, |
1895 | s64 pool, struct ceph_string *pool_ns) | |
10183a69 YZ |
1896 | { |
1897 | struct ceph_fs_client *fsc = ceph_inode_to_client(&ci->vfs_inode); | |
1898 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
1899 | struct ceph_osd_request *rd_req = NULL, *wr_req = NULL; | |
1900 | struct rb_node **p, *parent; | |
1901 | struct ceph_pool_perm *perm; | |
1902 | struct page **pages; | |
779fe0fb | 1903 | size_t pool_ns_len; |
10183a69 YZ |
1904 | int err = 0, err2 = 0, have = 0; |
1905 | ||
1906 | down_read(&mdsc->pool_perm_rwsem); | |
1907 | p = &mdsc->pool_perm_tree.rb_node; | |
1908 | while (*p) { | |
1909 | perm = rb_entry(*p, struct ceph_pool_perm, node); | |
1910 | if (pool < perm->pool) | |
1911 | p = &(*p)->rb_left; | |
1912 | else if (pool > perm->pool) | |
1913 | p = &(*p)->rb_right; | |
1914 | else { | |
779fe0fb YZ |
1915 | int ret = ceph_compare_string(pool_ns, |
1916 | perm->pool_ns, | |
1917 | perm->pool_ns_len); | |
1918 | if (ret < 0) | |
1919 | p = &(*p)->rb_left; | |
1920 | else if (ret > 0) | |
1921 | p = &(*p)->rb_right; | |
1922 | else { | |
1923 | have = perm->perm; | |
1924 | break; | |
1925 | } | |
10183a69 YZ |
1926 | } |
1927 | } | |
1928 | up_read(&mdsc->pool_perm_rwsem); | |
1929 | if (*p) | |
1930 | goto out; | |
1931 | ||
779fe0fb YZ |
1932 | if (pool_ns) |
1933 | dout("__ceph_pool_perm_get pool %lld ns %.*s no perm cached\n", | |
1934 | pool, (int)pool_ns->len, pool_ns->str); | |
1935 | else | |
1936 | dout("__ceph_pool_perm_get pool %lld no perm cached\n", pool); | |
10183a69 YZ |
1937 | |
1938 | down_write(&mdsc->pool_perm_rwsem); | |
779fe0fb | 1939 | p = &mdsc->pool_perm_tree.rb_node; |
10183a69 YZ |
1940 | parent = NULL; |
1941 | while (*p) { | |
1942 | parent = *p; | |
1943 | perm = rb_entry(parent, struct ceph_pool_perm, node); | |
1944 | if (pool < perm->pool) | |
1945 | p = &(*p)->rb_left; | |
1946 | else if (pool > perm->pool) | |
1947 | p = &(*p)->rb_right; | |
1948 | else { | |
779fe0fb YZ |
1949 | int ret = ceph_compare_string(pool_ns, |
1950 | perm->pool_ns, | |
1951 | perm->pool_ns_len); | |
1952 | if (ret < 0) | |
1953 | p = &(*p)->rb_left; | |
1954 | else if (ret > 0) | |
1955 | p = &(*p)->rb_right; | |
1956 | else { | |
1957 | have = perm->perm; | |
1958 | break; | |
1959 | } | |
10183a69 YZ |
1960 | } |
1961 | } | |
1962 | if (*p) { | |
1963 | up_write(&mdsc->pool_perm_rwsem); | |
1964 | goto out; | |
1965 | } | |
1966 | ||
34b759b4 | 1967 | rd_req = ceph_osdc_alloc_request(&fsc->client->osdc, NULL, |
10183a69 YZ |
1968 | 1, false, GFP_NOFS); |
1969 | if (!rd_req) { | |
1970 | err = -ENOMEM; | |
1971 | goto out_unlock; | |
1972 | } | |
1973 | ||
1974 | rd_req->r_flags = CEPH_OSD_FLAG_READ; | |
1975 | osd_req_op_init(rd_req, 0, CEPH_OSD_OP_STAT, 0); | |
1976 | rd_req->r_base_oloc.pool = pool; | |
779fe0fb YZ |
1977 | if (pool_ns) |
1978 | rd_req->r_base_oloc.pool_ns = ceph_get_string(pool_ns); | |
d30291b9 | 1979 | ceph_oid_printf(&rd_req->r_base_oid, "%llx.00000000", ci->i_vino.ino); |
10183a69 | 1980 | |
13d1ad16 ID |
1981 | err = ceph_osdc_alloc_messages(rd_req, GFP_NOFS); |
1982 | if (err) | |
1983 | goto out_unlock; | |
10183a69 | 1984 | |
34b759b4 | 1985 | wr_req = ceph_osdc_alloc_request(&fsc->client->osdc, NULL, |
10183a69 YZ |
1986 | 1, false, GFP_NOFS); |
1987 | if (!wr_req) { | |
1988 | err = -ENOMEM; | |
1989 | goto out_unlock; | |
1990 | } | |
1991 | ||
54ea0046 | 1992 | wr_req->r_flags = CEPH_OSD_FLAG_WRITE; |
10183a69 | 1993 | osd_req_op_init(wr_req, 0, CEPH_OSD_OP_CREATE, CEPH_OSD_OP_FLAG_EXCL); |
63244fa1 | 1994 | ceph_oloc_copy(&wr_req->r_base_oloc, &rd_req->r_base_oloc); |
d30291b9 | 1995 | ceph_oid_copy(&wr_req->r_base_oid, &rd_req->r_base_oid); |
10183a69 | 1996 | |
13d1ad16 ID |
1997 | err = ceph_osdc_alloc_messages(wr_req, GFP_NOFS); |
1998 | if (err) | |
1999 | goto out_unlock; | |
10183a69 YZ |
2000 | |
2001 | /* one page should be large enough for STAT data */ | |
2002 | pages = ceph_alloc_page_vector(1, GFP_KERNEL); | |
2003 | if (IS_ERR(pages)) { | |
2004 | err = PTR_ERR(pages); | |
2005 | goto out_unlock; | |
2006 | } | |
2007 | ||
2008 | osd_req_op_raw_data_in_pages(rd_req, 0, pages, PAGE_SIZE, | |
2009 | 0, false, true); | |
10183a69 YZ |
2010 | err = ceph_osdc_start_request(&fsc->client->osdc, rd_req, false); |
2011 | ||
fac02ddf | 2012 | wr_req->r_mtime = ci->vfs_inode.i_mtime; |
10183a69 YZ |
2013 | err2 = ceph_osdc_start_request(&fsc->client->osdc, wr_req, false); |
2014 | ||
2015 | if (!err) | |
2016 | err = ceph_osdc_wait_request(&fsc->client->osdc, rd_req); | |
2017 | if (!err2) | |
2018 | err2 = ceph_osdc_wait_request(&fsc->client->osdc, wr_req); | |
2019 | ||
2020 | if (err >= 0 || err == -ENOENT) | |
2021 | have |= POOL_READ; | |
131d7eb4 YZ |
2022 | else if (err != -EPERM) { |
2023 | if (err == -EBLACKLISTED) | |
2024 | fsc->blacklisted = true; | |
10183a69 | 2025 | goto out_unlock; |
131d7eb4 | 2026 | } |
10183a69 YZ |
2027 | |
2028 | if (err2 == 0 || err2 == -EEXIST) | |
2029 | have |= POOL_WRITE; | |
2030 | else if (err2 != -EPERM) { | |
131d7eb4 YZ |
2031 | if (err2 == -EBLACKLISTED) |
2032 | fsc->blacklisted = true; | |
10183a69 YZ |
2033 | err = err2; |
2034 | goto out_unlock; | |
2035 | } | |
2036 | ||
779fe0fb YZ |
2037 | pool_ns_len = pool_ns ? pool_ns->len : 0; |
2038 | perm = kmalloc(sizeof(*perm) + pool_ns_len + 1, GFP_NOFS); | |
10183a69 YZ |
2039 | if (!perm) { |
2040 | err = -ENOMEM; | |
2041 | goto out_unlock; | |
2042 | } | |
2043 | ||
2044 | perm->pool = pool; | |
2045 | perm->perm = have; | |
779fe0fb YZ |
2046 | perm->pool_ns_len = pool_ns_len; |
2047 | if (pool_ns_len > 0) | |
2048 | memcpy(perm->pool_ns, pool_ns->str, pool_ns_len); | |
2049 | perm->pool_ns[pool_ns_len] = 0; | |
2050 | ||
10183a69 YZ |
2051 | rb_link_node(&perm->node, parent, p); |
2052 | rb_insert_color(&perm->node, &mdsc->pool_perm_tree); | |
2053 | err = 0; | |
2054 | out_unlock: | |
2055 | up_write(&mdsc->pool_perm_rwsem); | |
2056 | ||
3ed97d63 ID |
2057 | ceph_osdc_put_request(rd_req); |
2058 | ceph_osdc_put_request(wr_req); | |
10183a69 YZ |
2059 | out: |
2060 | if (!err) | |
2061 | err = have; | |
779fe0fb YZ |
2062 | if (pool_ns) |
2063 | dout("__ceph_pool_perm_get pool %lld ns %.*s result = %d\n", | |
2064 | pool, (int)pool_ns->len, pool_ns->str, err); | |
2065 | else | |
2066 | dout("__ceph_pool_perm_get pool %lld result = %d\n", pool, err); | |
10183a69 YZ |
2067 | return err; |
2068 | } | |
2069 | ||
5e3ded1b | 2070 | int ceph_pool_perm_check(struct inode *inode, int need) |
10183a69 | 2071 | { |
5e3ded1b | 2072 | struct ceph_inode_info *ci = ceph_inode(inode); |
779fe0fb | 2073 | struct ceph_string *pool_ns; |
5e3ded1b | 2074 | s64 pool; |
10183a69 YZ |
2075 | int ret, flags; |
2076 | ||
80e80fbb YZ |
2077 | if (ci->i_vino.snap != CEPH_NOSNAP) { |
2078 | /* | |
2079 | * Pool permission check needs to write to the first object. | |
2080 | * But for snapshot, head of the first object may have alread | |
2081 | * been deleted. Skip check to avoid creating orphan object. | |
2082 | */ | |
2083 | return 0; | |
2084 | } | |
2085 | ||
5e3ded1b | 2086 | if (ceph_test_mount_opt(ceph_inode_to_client(inode), |
10183a69 YZ |
2087 | NOPOOLPERM)) |
2088 | return 0; | |
2089 | ||
2090 | spin_lock(&ci->i_ceph_lock); | |
2091 | flags = ci->i_ceph_flags; | |
7627151e | 2092 | pool = ci->i_layout.pool_id; |
10183a69 YZ |
2093 | spin_unlock(&ci->i_ceph_lock); |
2094 | check: | |
2095 | if (flags & CEPH_I_POOL_PERM) { | |
2096 | if ((need & CEPH_CAP_FILE_RD) && !(flags & CEPH_I_POOL_RD)) { | |
7627151e | 2097 | dout("ceph_pool_perm_check pool %lld no read perm\n", |
10183a69 YZ |
2098 | pool); |
2099 | return -EPERM; | |
2100 | } | |
2101 | if ((need & CEPH_CAP_FILE_WR) && !(flags & CEPH_I_POOL_WR)) { | |
7627151e | 2102 | dout("ceph_pool_perm_check pool %lld no write perm\n", |
10183a69 YZ |
2103 | pool); |
2104 | return -EPERM; | |
2105 | } | |
2106 | return 0; | |
2107 | } | |
2108 | ||
779fe0fb YZ |
2109 | pool_ns = ceph_try_get_string(ci->i_layout.pool_ns); |
2110 | ret = __ceph_pool_perm_get(ci, pool, pool_ns); | |
2111 | ceph_put_string(pool_ns); | |
10183a69 YZ |
2112 | if (ret < 0) |
2113 | return ret; | |
2114 | ||
2115 | flags = CEPH_I_POOL_PERM; | |
2116 | if (ret & POOL_READ) | |
2117 | flags |= CEPH_I_POOL_RD; | |
2118 | if (ret & POOL_WRITE) | |
2119 | flags |= CEPH_I_POOL_WR; | |
2120 | ||
2121 | spin_lock(&ci->i_ceph_lock); | |
779fe0fb YZ |
2122 | if (pool == ci->i_layout.pool_id && |
2123 | pool_ns == rcu_dereference_raw(ci->i_layout.pool_ns)) { | |
2124 | ci->i_ceph_flags |= flags; | |
10183a69 | 2125 | } else { |
7627151e | 2126 | pool = ci->i_layout.pool_id; |
10183a69 YZ |
2127 | flags = ci->i_ceph_flags; |
2128 | } | |
2129 | spin_unlock(&ci->i_ceph_lock); | |
2130 | goto check; | |
2131 | } | |
2132 | ||
2133 | void ceph_pool_perm_destroy(struct ceph_mds_client *mdsc) | |
2134 | { | |
2135 | struct ceph_pool_perm *perm; | |
2136 | struct rb_node *n; | |
2137 | ||
2138 | while (!RB_EMPTY_ROOT(&mdsc->pool_perm_tree)) { | |
2139 | n = rb_first(&mdsc->pool_perm_tree); | |
2140 | perm = rb_entry(n, struct ceph_pool_perm, node); | |
2141 | rb_erase(n, &mdsc->pool_perm_tree); | |
2142 | kfree(perm); | |
2143 | } | |
2144 | } |