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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> |
97e27aaa | 14 | #include <linux/ktime.h> |
f0702876 | 15 | #include <linux/netfs.h> |
1d3576fd SW |
16 | |
17 | #include "super.h" | |
3d14c5d2 | 18 | #include "mds_client.h" |
99ccbd22 | 19 | #include "cache.h" |
97e27aaa | 20 | #include "metric.h" |
3d14c5d2 | 21 | #include <linux/ceph/osd_client.h> |
08c1ac50 | 22 | #include <linux/ceph/striper.h> |
1d3576fd SW |
23 | |
24 | /* | |
25 | * Ceph address space ops. | |
26 | * | |
27 | * There are a few funny things going on here. | |
28 | * | |
29 | * The page->private field is used to reference a struct | |
30 | * ceph_snap_context for _every_ dirty page. This indicates which | |
31 | * snapshot the page was logically dirtied in, and thus which snap | |
32 | * context needs to be associated with the osd write during writeback. | |
33 | * | |
34 | * Similarly, struct ceph_inode_info maintains a set of counters to | |
25985edc | 35 | * count dirty pages on the inode. In the absence of snapshots, |
1d3576fd SW |
36 | * i_wrbuffer_ref == i_wrbuffer_ref_head == the dirty page count. |
37 | * | |
38 | * When a snapshot is taken (that is, when the client receives | |
39 | * notification that a snapshot was taken), each inode with caps and | |
40 | * with dirty pages (dirty pages implies there is a cap) gets a new | |
41 | * ceph_cap_snap in the i_cap_snaps list (which is sorted in ascending | |
42 | * order, new snaps go to the tail). The i_wrbuffer_ref_head count is | |
43 | * moved to capsnap->dirty. (Unless a sync write is currently in | |
44 | * progress. In that case, the capsnap is said to be "pending", new | |
45 | * writes cannot start, and the capsnap isn't "finalized" until the | |
46 | * write completes (or fails) and a final size/mtime for the inode for | |
47 | * that snap can be settled upon.) i_wrbuffer_ref_head is reset to 0. | |
48 | * | |
49 | * On writeback, we must submit writes to the osd IN SNAP ORDER. So, | |
50 | * we look for the first capsnap in i_cap_snaps and write out pages in | |
51 | * that snap context _only_. Then we move on to the next capsnap, | |
52 | * eventually reaching the "live" or "head" context (i.e., pages that | |
53 | * are not yet snapped) and are writing the most recently dirtied | |
54 | * pages. | |
55 | * | |
56 | * Invalidate and so forth must take care to ensure the dirty page | |
57 | * accounting is preserved. | |
58 | */ | |
59 | ||
2baba250 YS |
60 | #define CONGESTION_ON_THRESH(congestion_kb) (congestion_kb >> (PAGE_SHIFT-10)) |
61 | #define CONGESTION_OFF_THRESH(congestion_kb) \ | |
62 | (CONGESTION_ON_THRESH(congestion_kb) - \ | |
63 | (CONGESTION_ON_THRESH(congestion_kb) >> 2)) | |
64 | ||
d801327d JL |
65 | static int ceph_netfs_check_write_begin(struct file *file, loff_t pos, unsigned int len, |
66 | struct page *page, void **_fsdata); | |
67 | ||
61600ef8 YZ |
68 | static inline struct ceph_snap_context *page_snap_context(struct page *page) |
69 | { | |
70 | if (PagePrivate(page)) | |
71 | return (void *)page->private; | |
72 | return NULL; | |
73 | } | |
1d3576fd SW |
74 | |
75 | /* | |
76 | * Dirty a page. Optimistically adjust accounting, on the assumption | |
77 | * that we won't race with invalidate. If we do, readjust. | |
78 | */ | |
79 | static int ceph_set_page_dirty(struct page *page) | |
80 | { | |
81 | struct address_space *mapping = page->mapping; | |
82 | struct inode *inode; | |
83 | struct ceph_inode_info *ci; | |
1d3576fd | 84 | struct ceph_snap_context *snapc; |
1d3576fd | 85 | |
7d6e1f54 | 86 | if (PageDirty(page)) { |
1d3576fd SW |
87 | dout("%p set_page_dirty %p idx %lu -- already dirty\n", |
88 | mapping->host, page, page->index); | |
7d6e1f54 | 89 | BUG_ON(!PagePrivate(page)); |
1d3576fd SW |
90 | return 0; |
91 | } | |
92 | ||
93 | inode = mapping->host; | |
94 | ci = ceph_inode(inode); | |
95 | ||
1d3576fd | 96 | /* dirty the head */ |
be655596 | 97 | spin_lock(&ci->i_ceph_lock); |
5dda377c YZ |
98 | BUG_ON(ci->i_wr_ref == 0); // caller should hold Fw reference |
99 | if (__ceph_have_pending_cap_snap(ci)) { | |
100 | struct ceph_cap_snap *capsnap = | |
101 | list_last_entry(&ci->i_cap_snaps, | |
102 | struct ceph_cap_snap, | |
103 | ci_item); | |
104 | snapc = ceph_get_snap_context(capsnap->context); | |
105 | capsnap->dirty_pages++; | |
106 | } else { | |
107 | BUG_ON(!ci->i_head_snapc); | |
108 | snapc = ceph_get_snap_context(ci->i_head_snapc); | |
109 | ++ci->i_wrbuffer_ref_head; | |
110 | } | |
1d3576fd | 111 | if (ci->i_wrbuffer_ref == 0) |
0444d76a | 112 | ihold(inode); |
1d3576fd SW |
113 | ++ci->i_wrbuffer_ref; |
114 | dout("%p set_page_dirty %p idx %lu head %d/%d -> %d/%d " | |
115 | "snapc %p seq %lld (%d snaps)\n", | |
116 | mapping->host, page, page->index, | |
117 | ci->i_wrbuffer_ref-1, ci->i_wrbuffer_ref_head-1, | |
118 | ci->i_wrbuffer_ref, ci->i_wrbuffer_ref_head, | |
119 | snapc, snapc->seq, snapc->num_snaps); | |
be655596 | 120 | spin_unlock(&ci->i_ceph_lock); |
1d3576fd | 121 | |
7d6e1f54 SZ |
122 | /* |
123 | * Reference snap context in page->private. Also set | |
124 | * PagePrivate so that we get invalidatepage callback. | |
125 | */ | |
126 | BUG_ON(PagePrivate(page)); | |
379fc7fa | 127 | attach_page_private(page, snapc); |
1d3576fd | 128 | |
22d41cdc | 129 | return __set_page_dirty_nobuffers(page); |
1d3576fd SW |
130 | } |
131 | ||
132 | /* | |
133 | * If we are truncating the full page (i.e. offset == 0), adjust the | |
134 | * dirty page counters appropriately. Only called if there is private | |
135 | * data on the page. | |
136 | */ | |
d47992f8 LC |
137 | static void ceph_invalidatepage(struct page *page, unsigned int offset, |
138 | unsigned int length) | |
1d3576fd | 139 | { |
4ce1e9ad | 140 | struct inode *inode; |
1d3576fd | 141 | struct ceph_inode_info *ci; |
379fc7fa | 142 | struct ceph_snap_context *snapc; |
1d3576fd | 143 | |
7c46b318 JL |
144 | wait_on_page_fscache(page); |
145 | ||
4ce1e9ad | 146 | inode = page->mapping->host; |
b150f5c1 MT |
147 | ci = ceph_inode(inode); |
148 | ||
8ff2d290 | 149 | if (offset != 0 || length != thp_size(page)) { |
b150f5c1 MT |
150 | dout("%p invalidatepage %p idx %lu partial dirty page %u~%u\n", |
151 | inode, page, page->index, offset, length); | |
152 | return; | |
153 | } | |
4ce1e9ad | 154 | |
b072d774 | 155 | WARN_ON(!PageLocked(page)); |
99ccbd22 MT |
156 | if (!PagePrivate(page)) |
157 | return; | |
158 | ||
b150f5c1 MT |
159 | dout("%p invalidatepage %p idx %lu full dirty page\n", |
160 | inode, page, page->index); | |
161 | ||
379fc7fa | 162 | snapc = detach_page_private(page); |
b150f5c1 MT |
163 | ceph_put_wrbuffer_cap_refs(ci, 1, snapc); |
164 | ceph_put_snap_context(snapc); | |
1d3576fd SW |
165 | } |
166 | ||
7c46b318 | 167 | static int ceph_releasepage(struct page *page, gfp_t gfp) |
1d3576fd | 168 | { |
e55f1a18 N |
169 | dout("%p releasepage %p idx %lu (%sdirty)\n", page->mapping->host, |
170 | page, page->index, PageDirty(page) ? "" : "not "); | |
99ccbd22 | 171 | |
7c46b318 JL |
172 | if (PageFsCache(page)) { |
173 | if (!(gfp & __GFP_DIRECT_RECLAIM) || !(gfp & __GFP_FS)) | |
174 | return 0; | |
175 | wait_on_page_fscache(page); | |
176 | } | |
99ccbd22 | 177 | return !PagePrivate(page); |
1d3576fd SW |
178 | } |
179 | ||
f0702876 JL |
180 | static void ceph_netfs_expand_readahead(struct netfs_read_request *rreq) |
181 | { | |
182 | struct inode *inode = rreq->mapping->host; | |
183 | struct ceph_inode_info *ci = ceph_inode(inode); | |
184 | struct ceph_file_layout *lo = &ci->i_layout; | |
185 | u32 blockoff; | |
186 | u64 blockno; | |
187 | ||
188 | /* Expand the start downward */ | |
189 | blockno = div_u64_rem(rreq->start, lo->stripe_unit, &blockoff); | |
190 | rreq->start = blockno * lo->stripe_unit; | |
191 | rreq->len += blockoff; | |
192 | ||
193 | /* Now, round up the length to the next block */ | |
194 | rreq->len = roundup(rreq->len, lo->stripe_unit); | |
195 | } | |
196 | ||
197 | static bool ceph_netfs_clamp_length(struct netfs_read_subrequest *subreq) | |
198 | { | |
199 | struct inode *inode = subreq->rreq->mapping->host; | |
200 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); | |
201 | struct ceph_inode_info *ci = ceph_inode(inode); | |
202 | u64 objno, objoff; | |
203 | u32 xlen; | |
204 | ||
205 | /* Truncate the extent at the end of the current block */ | |
206 | ceph_calc_file_object_mapping(&ci->i_layout, subreq->start, subreq->len, | |
207 | &objno, &objoff, &xlen); | |
208 | subreq->len = min(xlen, fsc->mount_options->rsize); | |
209 | return true; | |
210 | } | |
211 | ||
212 | static void finish_netfs_read(struct ceph_osd_request *req) | |
213 | { | |
214 | struct ceph_fs_client *fsc = ceph_inode_to_client(req->r_inode); | |
215 | struct ceph_osd_data *osd_data = osd_req_op_extent_osd_data(req, 0); | |
216 | struct netfs_read_subrequest *subreq = req->r_priv; | |
217 | int num_pages; | |
218 | int err = req->r_result; | |
219 | ||
8ae99ae2 | 220 | ceph_update_read_metrics(&fsc->mdsc->metric, req->r_start_latency, |
903f4fec | 221 | req->r_end_latency, osd_data->length, err); |
f0702876 JL |
222 | |
223 | dout("%s: result %d subreq->len=%zu i_size=%lld\n", __func__, req->r_result, | |
224 | subreq->len, i_size_read(req->r_inode)); | |
225 | ||
226 | /* no object means success but no data */ | |
227 | if (err == -ENOENT) | |
228 | err = 0; | |
229 | else if (err == -EBLOCKLISTED) | |
230 | fsc->blocklisted = true; | |
231 | ||
232 | if (err >= 0 && err < subreq->len) | |
233 | __set_bit(NETFS_SREQ_CLEAR_TAIL, &subreq->flags); | |
234 | ||
235 | netfs_subreq_terminated(subreq, err, true); | |
236 | ||
237 | num_pages = calc_pages_for(osd_data->alignment, osd_data->length); | |
238 | ceph_put_page_vector(osd_data->pages, num_pages, false); | |
239 | iput(req->r_inode); | |
240 | } | |
241 | ||
242 | static void ceph_netfs_issue_op(struct netfs_read_subrequest *subreq) | |
243 | { | |
244 | struct netfs_read_request *rreq = subreq->rreq; | |
245 | struct inode *inode = rreq->mapping->host; | |
246 | struct ceph_inode_info *ci = ceph_inode(inode); | |
247 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); | |
248 | struct ceph_osd_request *req; | |
249 | struct ceph_vino vino = ceph_vino(inode); | |
250 | struct iov_iter iter; | |
251 | struct page **pages; | |
252 | size_t page_off; | |
253 | int err = 0; | |
254 | u64 len = subreq->len; | |
255 | ||
256 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, vino, subreq->start, &len, | |
257 | 0, 1, CEPH_OSD_OP_READ, | |
258 | CEPH_OSD_FLAG_READ | fsc->client->osdc.client->options->read_from_replica, | |
259 | NULL, ci->i_truncate_seq, ci->i_truncate_size, false); | |
260 | if (IS_ERR(req)) { | |
261 | err = PTR_ERR(req); | |
262 | req = NULL; | |
263 | goto out; | |
264 | } | |
265 | ||
266 | dout("%s: pos=%llu orig_len=%zu len=%llu\n", __func__, subreq->start, subreq->len, len); | |
267 | iov_iter_xarray(&iter, READ, &rreq->mapping->i_pages, subreq->start, len); | |
268 | err = iov_iter_get_pages_alloc(&iter, &pages, len, &page_off); | |
269 | if (err < 0) { | |
270 | dout("%s: iov_ter_get_pages_alloc returned %d\n", __func__, err); | |
271 | goto out; | |
272 | } | |
273 | ||
274 | /* should always give us a page-aligned read */ | |
275 | WARN_ON_ONCE(page_off); | |
276 | len = err; | |
277 | ||
278 | osd_req_op_extent_osd_data_pages(req, 0, pages, len, 0, false, false); | |
279 | req->r_callback = finish_netfs_read; | |
280 | req->r_priv = subreq; | |
281 | req->r_inode = inode; | |
282 | ihold(inode); | |
283 | ||
284 | err = ceph_osdc_start_request(req->r_osdc, req, false); | |
285 | if (err) | |
286 | iput(inode); | |
287 | out: | |
288 | ceph_osdc_put_request(req); | |
289 | if (err) | |
290 | netfs_subreq_terminated(subreq, err, false); | |
291 | dout("%s: result %d\n", __func__, err); | |
292 | } | |
293 | ||
294 | static void ceph_init_rreq(struct netfs_read_request *rreq, struct file *file) | |
295 | { | |
296 | } | |
297 | ||
49870056 JL |
298 | static void ceph_readahead_cleanup(struct address_space *mapping, void *priv) |
299 | { | |
300 | struct inode *inode = mapping->host; | |
301 | struct ceph_inode_info *ci = ceph_inode(inode); | |
302 | int got = (uintptr_t)priv; | |
303 | ||
304 | if (got) | |
305 | ceph_put_cap_refs(ci, got); | |
306 | } | |
307 | ||
675d4d89 | 308 | static const struct netfs_read_request_ops ceph_netfs_read_ops = { |
f0702876 JL |
309 | .init_rreq = ceph_init_rreq, |
310 | .is_cache_enabled = ceph_is_cache_enabled, | |
311 | .begin_cache_operation = ceph_begin_cache_operation, | |
312 | .issue_op = ceph_netfs_issue_op, | |
313 | .expand_readahead = ceph_netfs_expand_readahead, | |
314 | .clamp_length = ceph_netfs_clamp_length, | |
d801327d | 315 | .check_write_begin = ceph_netfs_check_write_begin, |
49870056 | 316 | .cleanup = ceph_readahead_cleanup, |
f0702876 JL |
317 | }; |
318 | ||
319 | /* read a single page, without unlocking it. */ | |
320 | static int ceph_readpage(struct file *file, struct page *page) | |
321 | { | |
322 | struct inode *inode = file_inode(file); | |
323 | struct ceph_inode_info *ci = ceph_inode(inode); | |
324 | struct ceph_vino vino = ceph_vino(inode); | |
325 | u64 off = page_offset(page); | |
8ff2d290 | 326 | u64 len = thp_size(page); |
f0702876 JL |
327 | |
328 | if (ci->i_inline_version != CEPH_INLINE_NONE) { | |
329 | /* | |
330 | * Uptodate inline data should have been added | |
331 | * into page cache while getting Fcr caps. | |
332 | */ | |
333 | if (off == 0) { | |
334 | unlock_page(page); | |
335 | return -EINVAL; | |
336 | } | |
8ff2d290 | 337 | zero_user_segment(page, 0, thp_size(page)); |
f0702876 JL |
338 | SetPageUptodate(page); |
339 | unlock_page(page); | |
340 | return 0; | |
341 | } | |
342 | ||
343 | dout("readpage ino %llx.%llx file %p off %llu len %llu page %p index %lu\n", | |
344 | vino.ino, vino.snap, file, off, len, page, page->index); | |
345 | ||
346 | return netfs_readpage(file, page, &ceph_netfs_read_ops, NULL); | |
347 | } | |
348 | ||
49870056 | 349 | static void ceph_readahead(struct readahead_control *ractl) |
1d3576fd | 350 | { |
49870056 JL |
351 | struct inode *inode = file_inode(ractl->file); |
352 | struct ceph_file_info *fi = ractl->file->private_data; | |
353 | struct ceph_rw_context *rw_ctx; | |
2b1ac852 YZ |
354 | int got = 0; |
355 | int ret = 0; | |
356 | ||
49870056 JL |
357 | if (ceph_inode(inode)->i_inline_version != CEPH_INLINE_NONE) |
358 | return; | |
359 | ||
360 | rw_ctx = ceph_find_rw_context(fi); | |
5d988308 | 361 | if (!rw_ctx) { |
49870056 JL |
362 | /* |
363 | * readahead callers do not necessarily hold Fcb caps | |
364 | * (e.g. fadvise, madvise). | |
365 | */ | |
2b1ac852 | 366 | int want = CEPH_CAP_FILE_CACHE; |
49870056 JL |
367 | |
368 | ret = ceph_try_get_caps(inode, CEPH_CAP_FILE_RD, want, true, &got); | |
369 | if (ret < 0) | |
2b1ac852 | 370 | dout("start_read %p, error getting cap\n", inode); |
49870056 | 371 | else if (!(got & want)) |
2b1ac852 | 372 | dout("start_read %p, no cache cap\n", inode); |
1d3576fd | 373 | |
49870056 JL |
374 | if (ret <= 0) |
375 | return; | |
2b1ac852 | 376 | } |
49870056 | 377 | netfs_readahead(ractl, &ceph_netfs_read_ops, (void *)(uintptr_t)got); |
1d3576fd SW |
378 | } |
379 | ||
1f934b00 YZ |
380 | struct ceph_writeback_ctl |
381 | { | |
382 | loff_t i_size; | |
383 | u64 truncate_size; | |
384 | u32 truncate_seq; | |
385 | bool size_stable; | |
2a2d927e | 386 | bool head_snapc; |
1f934b00 YZ |
387 | }; |
388 | ||
1d3576fd SW |
389 | /* |
390 | * Get ref for the oldest snapc for an inode with dirty data... that is, the | |
391 | * only snap context we are allowed to write back. | |
1d3576fd | 392 | */ |
1f934b00 | 393 | static struct ceph_snap_context * |
05455e11 YZ |
394 | get_oldest_context(struct inode *inode, struct ceph_writeback_ctl *ctl, |
395 | struct ceph_snap_context *page_snapc) | |
1d3576fd SW |
396 | { |
397 | struct ceph_inode_info *ci = ceph_inode(inode); | |
398 | struct ceph_snap_context *snapc = NULL; | |
399 | struct ceph_cap_snap *capsnap = NULL; | |
400 | ||
be655596 | 401 | spin_lock(&ci->i_ceph_lock); |
1d3576fd SW |
402 | list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) { |
403 | dout(" cap_snap %p snapc %p has %d dirty pages\n", capsnap, | |
404 | capsnap->context, capsnap->dirty_pages); | |
05455e11 YZ |
405 | if (!capsnap->dirty_pages) |
406 | continue; | |
407 | ||
408 | /* get i_size, truncate_{seq,size} for page_snapc? */ | |
409 | if (snapc && capsnap->context != page_snapc) | |
410 | continue; | |
411 | ||
412 | if (ctl) { | |
413 | if (capsnap->writing) { | |
414 | ctl->i_size = i_size_read(inode); | |
415 | ctl->size_stable = false; | |
416 | } else { | |
417 | ctl->i_size = capsnap->size; | |
418 | ctl->size_stable = true; | |
1f934b00 | 419 | } |
05455e11 YZ |
420 | ctl->truncate_size = capsnap->truncate_size; |
421 | ctl->truncate_seq = capsnap->truncate_seq; | |
2a2d927e | 422 | ctl->head_snapc = false; |
1d3576fd | 423 | } |
05455e11 YZ |
424 | |
425 | if (snapc) | |
426 | break; | |
427 | ||
428 | snapc = ceph_get_snap_context(capsnap->context); | |
429 | if (!page_snapc || | |
430 | page_snapc == snapc || | |
431 | page_snapc->seq > snapc->seq) | |
432 | break; | |
1d3576fd | 433 | } |
7d8cb26d | 434 | if (!snapc && ci->i_wrbuffer_ref_head) { |
80e755fe | 435 | snapc = ceph_get_snap_context(ci->i_head_snapc); |
1d3576fd SW |
436 | dout(" head snapc %p has %d dirty pages\n", |
437 | snapc, ci->i_wrbuffer_ref_head); | |
1f934b00 YZ |
438 | if (ctl) { |
439 | ctl->i_size = i_size_read(inode); | |
440 | ctl->truncate_size = ci->i_truncate_size; | |
441 | ctl->truncate_seq = ci->i_truncate_seq; | |
442 | ctl->size_stable = false; | |
2a2d927e | 443 | ctl->head_snapc = true; |
1f934b00 | 444 | } |
1d3576fd | 445 | } |
be655596 | 446 | spin_unlock(&ci->i_ceph_lock); |
1d3576fd SW |
447 | return snapc; |
448 | } | |
449 | ||
1f934b00 YZ |
450 | static u64 get_writepages_data_length(struct inode *inode, |
451 | struct page *page, u64 start) | |
452 | { | |
453 | struct ceph_inode_info *ci = ceph_inode(inode); | |
454 | struct ceph_snap_context *snapc = page_snap_context(page); | |
455 | struct ceph_cap_snap *capsnap = NULL; | |
456 | u64 end = i_size_read(inode); | |
457 | ||
458 | if (snapc != ci->i_head_snapc) { | |
459 | bool found = false; | |
460 | spin_lock(&ci->i_ceph_lock); | |
461 | list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) { | |
462 | if (capsnap->context == snapc) { | |
463 | if (!capsnap->writing) | |
464 | end = capsnap->size; | |
465 | found = true; | |
466 | break; | |
467 | } | |
468 | } | |
469 | spin_unlock(&ci->i_ceph_lock); | |
470 | WARN_ON(!found); | |
471 | } | |
8ff2d290 JL |
472 | if (end > page_offset(page) + thp_size(page)) |
473 | end = page_offset(page) + thp_size(page); | |
1f934b00 YZ |
474 | return end > start ? end - start : 0; |
475 | } | |
476 | ||
1d3576fd SW |
477 | /* |
478 | * Write a single page, but leave the page locked. | |
479 | * | |
b72b13eb | 480 | * If we get a write error, mark the mapping for error, but still adjust the |
1d3576fd SW |
481 | * dirty page accounting (i.e., page is no longer dirty). |
482 | */ | |
483 | static int writepage_nounlock(struct page *page, struct writeback_control *wbc) | |
484 | { | |
6390987f JL |
485 | struct inode *inode = page->mapping->host; |
486 | struct ceph_inode_info *ci = ceph_inode(inode); | |
487 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); | |
6298a337 | 488 | struct ceph_snap_context *snapc, *oldest; |
fc2744aa | 489 | loff_t page_off = page_offset(page); |
6390987f | 490 | int err; |
8ff2d290 | 491 | loff_t len = thp_size(page); |
1f934b00 | 492 | struct ceph_writeback_ctl ceph_wbc; |
6390987f JL |
493 | struct ceph_osd_client *osdc = &fsc->client->osdc; |
494 | struct ceph_osd_request *req; | |
1d3576fd SW |
495 | |
496 | dout("writepage %p idx %lu\n", page, page->index); | |
497 | ||
1d3576fd | 498 | /* verify this is a writeable snap context */ |
61600ef8 | 499 | snapc = page_snap_context(page); |
d37b1d99 | 500 | if (!snapc) { |
1d3576fd | 501 | dout("writepage %p page %p not dirty?\n", inode, page); |
43986881 | 502 | return 0; |
1d3576fd | 503 | } |
05455e11 | 504 | oldest = get_oldest_context(inode, &ceph_wbc, snapc); |
6298a337 | 505 | if (snapc->seq > oldest->seq) { |
1d3576fd | 506 | dout("writepage %p page %p snapc %p not writeable - noop\n", |
61600ef8 | 507 | inode, page, snapc); |
1d3576fd | 508 | /* we should only noop if called by kswapd */ |
fa71fefb | 509 | WARN_ON(!(current->flags & PF_MEMALLOC)); |
6298a337 | 510 | ceph_put_snap_context(oldest); |
fa71fefb | 511 | redirty_page_for_writepage(wbc, page); |
43986881 | 512 | return 0; |
1d3576fd | 513 | } |
6298a337 | 514 | ceph_put_snap_context(oldest); |
1d3576fd SW |
515 | |
516 | /* is this a partial page at end of file? */ | |
1f934b00 YZ |
517 | if (page_off >= ceph_wbc.i_size) { |
518 | dout("%p page eof %llu\n", page, ceph_wbc.i_size); | |
8ff2d290 | 519 | page->mapping->a_ops->invalidatepage(page, 0, thp_size(page)); |
43986881 | 520 | return 0; |
fc2744aa | 521 | } |
43986881 | 522 | |
1f934b00 YZ |
523 | if (ceph_wbc.i_size < page_off + len) |
524 | len = ceph_wbc.i_size - page_off; | |
1d3576fd | 525 | |
6390987f | 526 | dout("writepage %p page %p index %lu on %llu~%llu snapc %p seq %lld\n", |
1c0a9c2d | 527 | inode, page, page->index, page_off, len, snapc, snapc->seq); |
1d3576fd | 528 | |
314c4737 | 529 | if (atomic_long_inc_return(&fsc->writeback_count) > |
3d14c5d2 | 530 | CONGESTION_ON_THRESH(fsc->mount_options->congestion_kb)) |
09dc9fc2 | 531 | set_bdi_congested(inode_to_bdi(inode), BLK_RW_ASYNC); |
2baba250 | 532 | |
1d3576fd | 533 | set_page_writeback(page); |
6390987f JL |
534 | req = ceph_osdc_new_request(osdc, &ci->i_layout, ceph_vino(inode), page_off, &len, 0, 1, |
535 | CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE, snapc, | |
536 | ceph_wbc.truncate_seq, ceph_wbc.truncate_size, | |
537 | true); | |
538 | if (IS_ERR(req)) { | |
539 | redirty_page_for_writepage(wbc, page); | |
540 | end_page_writeback(page); | |
541 | return PTR_ERR(req); | |
542 | } | |
543 | ||
544 | /* it may be a short write due to an object boundary */ | |
8ff2d290 | 545 | WARN_ON_ONCE(len > thp_size(page)); |
6390987f JL |
546 | osd_req_op_extent_osd_data_pages(req, 0, &page, len, 0, false, false); |
547 | dout("writepage %llu~%llu (%llu bytes)\n", page_off, len, len); | |
548 | ||
549 | req->r_mtime = inode->i_mtime; | |
550 | err = ceph_osdc_start_request(osdc, req, true); | |
551 | if (!err) | |
552 | err = ceph_osdc_wait_request(osdc, req); | |
553 | ||
8ae99ae2 | 554 | ceph_update_write_metrics(&fsc->mdsc->metric, req->r_start_latency, |
903f4fec | 555 | req->r_end_latency, len, err); |
6390987f JL |
556 | |
557 | ceph_osdc_put_request(req); | |
558 | if (err == 0) | |
559 | err = len; | |
560 | ||
1d3576fd | 561 | if (err < 0) { |
ad15ec06 YZ |
562 | struct writeback_control tmp_wbc; |
563 | if (!wbc) | |
564 | wbc = &tmp_wbc; | |
565 | if (err == -ERESTARTSYS) { | |
566 | /* killed by SIGKILL */ | |
567 | dout("writepage interrupted page %p\n", page); | |
568 | redirty_page_for_writepage(wbc, page); | |
569 | end_page_writeback(page); | |
43986881 | 570 | return err; |
ad15ec06 | 571 | } |
0b98acd6 ID |
572 | if (err == -EBLOCKLISTED) |
573 | fsc->blocklisted = true; | |
ad15ec06 YZ |
574 | dout("writepage setting page/mapping error %d %p\n", |
575 | err, page); | |
1d3576fd | 576 | mapping_set_error(&inode->i_data, err); |
ad15ec06 | 577 | wbc->pages_skipped++; |
1d3576fd SW |
578 | } else { |
579 | dout("writepage cleaned page %p\n", page); | |
580 | err = 0; /* vfs expects us to return 0 */ | |
581 | } | |
379fc7fa JL |
582 | oldest = detach_page_private(page); |
583 | WARN_ON_ONCE(oldest != snapc); | |
1d3576fd SW |
584 | end_page_writeback(page); |
585 | ceph_put_wrbuffer_cap_refs(ci, 1, snapc); | |
6298a337 | 586 | ceph_put_snap_context(snapc); /* page's reference */ |
314c4737 YZ |
587 | |
588 | if (atomic_long_dec_return(&fsc->writeback_count) < | |
589 | CONGESTION_OFF_THRESH(fsc->mount_options->congestion_kb)) | |
590 | clear_bdi_congested(inode_to_bdi(inode), BLK_RW_ASYNC); | |
591 | ||
1d3576fd SW |
592 | return err; |
593 | } | |
594 | ||
595 | static int ceph_writepage(struct page *page, struct writeback_control *wbc) | |
596 | { | |
dbd646a8 YS |
597 | int err; |
598 | struct inode *inode = page->mapping->host; | |
599 | BUG_ON(!inode); | |
70b666c3 | 600 | ihold(inode); |
dbd646a8 | 601 | err = writepage_nounlock(page, wbc); |
ad15ec06 YZ |
602 | if (err == -ERESTARTSYS) { |
603 | /* direct memory reclaimer was killed by SIGKILL. return 0 | |
604 | * to prevent caller from setting mapping/page error */ | |
605 | err = 0; | |
606 | } | |
1d3576fd | 607 | unlock_page(page); |
dbd646a8 | 608 | iput(inode); |
1d3576fd SW |
609 | return err; |
610 | } | |
611 | ||
1d3576fd SW |
612 | /* |
613 | * async writeback completion handler. | |
614 | * | |
615 | * If we get an error, set the mapping error bit, but not the individual | |
616 | * page error bits. | |
617 | */ | |
85e084fe | 618 | static void writepages_finish(struct ceph_osd_request *req) |
1d3576fd SW |
619 | { |
620 | struct inode *inode = req->r_inode; | |
1d3576fd | 621 | struct ceph_inode_info *ci = ceph_inode(inode); |
87060c10 | 622 | struct ceph_osd_data *osd_data; |
1d3576fd | 623 | struct page *page; |
5b64640c YZ |
624 | int num_pages, total_pages = 0; |
625 | int i, j; | |
626 | int rc = req->r_result; | |
1d3576fd SW |
627 | struct ceph_snap_context *snapc = req->r_snapc; |
628 | struct address_space *mapping = inode->i_mapping; | |
3d14c5d2 | 629 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
903f4fec | 630 | unsigned int len = 0; |
5b64640c | 631 | bool remove_page; |
1d3576fd | 632 | |
5b64640c | 633 | dout("writepages_finish %p rc %d\n", inode, rc); |
26544c62 | 634 | if (rc < 0) { |
1d3576fd | 635 | mapping_set_error(mapping, rc); |
26544c62 | 636 | ceph_set_error_write(ci); |
0b98acd6 ID |
637 | if (rc == -EBLOCKLISTED) |
638 | fsc->blocklisted = true; | |
26544c62 JL |
639 | } else { |
640 | ceph_clear_error_write(ci); | |
641 | } | |
5b64640c YZ |
642 | |
643 | /* | |
644 | * We lost the cache cap, need to truncate the page before | |
645 | * it is unlocked, otherwise we'd truncate it later in the | |
646 | * page truncation thread, possibly losing some data that | |
647 | * raced its way in | |
648 | */ | |
649 | remove_page = !(ceph_caps_issued(ci) & | |
650 | (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)); | |
1d3576fd SW |
651 | |
652 | /* clean all pages */ | |
5b64640c YZ |
653 | for (i = 0; i < req->r_num_ops; i++) { |
654 | if (req->r_ops[i].op != CEPH_OSD_OP_WRITE) | |
655 | break; | |
e63dc5c7 | 656 | |
5b64640c YZ |
657 | osd_data = osd_req_op_extent_osd_data(req, i); |
658 | BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGES); | |
903f4fec | 659 | len += osd_data->length; |
5b64640c YZ |
660 | num_pages = calc_pages_for((u64)osd_data->alignment, |
661 | (u64)osd_data->length); | |
662 | total_pages += num_pages; | |
663 | for (j = 0; j < num_pages; j++) { | |
664 | page = osd_data->pages[j]; | |
665 | BUG_ON(!page); | |
666 | WARN_ON(!PageUptodate(page)); | |
667 | ||
668 | if (atomic_long_dec_return(&fsc->writeback_count) < | |
669 | CONGESTION_OFF_THRESH( | |
670 | fsc->mount_options->congestion_kb)) | |
09dc9fc2 | 671 | clear_bdi_congested(inode_to_bdi(inode), |
5b64640c YZ |
672 | BLK_RW_ASYNC); |
673 | ||
379fc7fa | 674 | ceph_put_snap_context(detach_page_private(page)); |
5b64640c | 675 | end_page_writeback(page); |
379fc7fa | 676 | dout("unlocking %p\n", page); |
5b64640c YZ |
677 | |
678 | if (remove_page) | |
679 | generic_error_remove_page(inode->i_mapping, | |
680 | page); | |
681 | ||
682 | unlock_page(page); | |
683 | } | |
684 | dout("writepages_finish %p wrote %llu bytes cleaned %d pages\n", | |
685 | inode, osd_data->length, rc >= 0 ? num_pages : 0); | |
e63dc5c7 | 686 | |
96ac9158 | 687 | release_pages(osd_data->pages, num_pages); |
1d3576fd | 688 | } |
1d3576fd | 689 | |
903f4fec XL |
690 | ceph_update_write_metrics(&fsc->mdsc->metric, req->r_start_latency, |
691 | req->r_end_latency, len, rc); | |
692 | ||
5b64640c YZ |
693 | ceph_put_wrbuffer_cap_refs(ci, total_pages, snapc); |
694 | ||
695 | osd_data = osd_req_op_extent_osd_data(req, 0); | |
87060c10 | 696 | if (osd_data->pages_from_pool) |
a0102bda | 697 | mempool_free(osd_data->pages, ceph_wb_pagevec_pool); |
1d3576fd | 698 | else |
87060c10 | 699 | kfree(osd_data->pages); |
1d3576fd SW |
700 | ceph_osdc_put_request(req); |
701 | } | |
702 | ||
1d3576fd SW |
703 | /* |
704 | * initiate async writeback | |
705 | */ | |
706 | static int ceph_writepages_start(struct address_space *mapping, | |
707 | struct writeback_control *wbc) | |
708 | { | |
709 | struct inode *inode = mapping->host; | |
1d3576fd | 710 | struct ceph_inode_info *ci = ceph_inode(inode); |
fc2744aa YZ |
711 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
712 | struct ceph_vino vino = ceph_vino(inode); | |
2a2d927e | 713 | pgoff_t index, start_index, end = -1; |
80e755fe | 714 | struct ceph_snap_context *snapc = NULL, *last_snapc = NULL, *pgsnapc; |
1d3576fd | 715 | struct pagevec pvec; |
1d3576fd | 716 | int rc = 0; |
93407472 | 717 | unsigned int wsize = i_blocksize(inode); |
1d3576fd | 718 | struct ceph_osd_request *req = NULL; |
1f934b00 | 719 | struct ceph_writeback_ctl ceph_wbc; |
590e9d98 | 720 | bool should_loop, range_whole = false; |
af9cc401 | 721 | bool done = false; |
1d3576fd | 722 | |
3fb99d48 | 723 | dout("writepages_start %p (mode=%s)\n", inode, |
1d3576fd SW |
724 | wbc->sync_mode == WB_SYNC_NONE ? "NONE" : |
725 | (wbc->sync_mode == WB_SYNC_ALL ? "ALL" : "HOLD")); | |
726 | ||
50c9132d | 727 | if (READ_ONCE(fsc->mount_state) >= CEPH_MOUNT_SHUTDOWN) { |
6c93df5d YZ |
728 | if (ci->i_wrbuffer_ref > 0) { |
729 | pr_warn_ratelimited( | |
730 | "writepage_start %p %lld forced umount\n", | |
731 | inode, ceph_ino(inode)); | |
732 | } | |
a341d4df | 733 | mapping_set_error(mapping, -EIO); |
1d3576fd SW |
734 | return -EIO; /* we're in a forced umount, don't write! */ |
735 | } | |
95cca2b4 | 736 | if (fsc->mount_options->wsize < wsize) |
3d14c5d2 | 737 | wsize = fsc->mount_options->wsize; |
1d3576fd | 738 | |
86679820 | 739 | pagevec_init(&pvec); |
1d3576fd | 740 | |
590e9d98 | 741 | start_index = wbc->range_cyclic ? mapping->writeback_index : 0; |
2a2d927e | 742 | index = start_index; |
1d3576fd SW |
743 | |
744 | retry: | |
745 | /* find oldest snap context with dirty data */ | |
05455e11 | 746 | snapc = get_oldest_context(inode, &ceph_wbc, NULL); |
1d3576fd SW |
747 | if (!snapc) { |
748 | /* hmm, why does writepages get called when there | |
749 | is no dirty data? */ | |
750 | dout(" no snap context with dirty data?\n"); | |
751 | goto out; | |
752 | } | |
753 | dout(" oldest snapc is %p seq %lld (%d snaps)\n", | |
754 | snapc, snapc->seq, snapc->num_snaps); | |
fc2744aa | 755 | |
2a2d927e YZ |
756 | should_loop = false; |
757 | if (ceph_wbc.head_snapc && snapc != last_snapc) { | |
758 | /* where to start/end? */ | |
759 | if (wbc->range_cyclic) { | |
760 | index = start_index; | |
761 | end = -1; | |
762 | if (index > 0) | |
763 | should_loop = true; | |
764 | dout(" cyclic, start at %lu\n", index); | |
765 | } else { | |
766 | index = wbc->range_start >> PAGE_SHIFT; | |
767 | end = wbc->range_end >> PAGE_SHIFT; | |
768 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) | |
769 | range_whole = true; | |
770 | dout(" not cyclic, %lu to %lu\n", index, end); | |
771 | } | |
772 | } else if (!ceph_wbc.head_snapc) { | |
773 | /* Do not respect wbc->range_{start,end}. Dirty pages | |
774 | * in that range can be associated with newer snapc. | |
775 | * They are not writeable until we write all dirty pages | |
776 | * associated with 'snapc' get written */ | |
1582af2e | 777 | if (index > 0) |
2a2d927e YZ |
778 | should_loop = true; |
779 | dout(" non-head snapc, range whole\n"); | |
1d3576fd | 780 | } |
2a2d927e YZ |
781 | |
782 | ceph_put_snap_context(last_snapc); | |
1d3576fd SW |
783 | last_snapc = snapc; |
784 | ||
af9cc401 | 785 | while (!done && index <= end) { |
5b64640c | 786 | int num_ops = 0, op_idx; |
0e5ecac7 | 787 | unsigned i, pvec_pages, max_pages, locked_pages = 0; |
5b64640c | 788 | struct page **pages = NULL, **data_pages; |
1d3576fd | 789 | struct page *page; |
0e5ecac7 | 790 | pgoff_t strip_unit_end = 0; |
5b64640c | 791 | u64 offset = 0, len = 0; |
a0102bda | 792 | bool from_pool = false; |
1d3576fd | 793 | |
0e5ecac7 | 794 | max_pages = wsize >> PAGE_SHIFT; |
1d3576fd SW |
795 | |
796 | get_more_pages: | |
2e169296 JL |
797 | pvec_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, |
798 | end, PAGECACHE_TAG_DIRTY); | |
0ed75fc8 | 799 | dout("pagevec_lookup_range_tag got %d\n", pvec_pages); |
1d3576fd SW |
800 | if (!pvec_pages && !locked_pages) |
801 | break; | |
802 | for (i = 0; i < pvec_pages && locked_pages < max_pages; i++) { | |
803 | page = pvec.pages[i]; | |
804 | dout("? %p idx %lu\n", page, page->index); | |
805 | if (locked_pages == 0) | |
806 | lock_page(page); /* first page */ | |
807 | else if (!trylock_page(page)) | |
808 | break; | |
809 | ||
810 | /* only dirty pages, or our accounting breaks */ | |
811 | if (unlikely(!PageDirty(page)) || | |
812 | unlikely(page->mapping != mapping)) { | |
813 | dout("!dirty or !mapping %p\n", page); | |
814 | unlock_page(page); | |
0713e5f2 | 815 | continue; |
1d3576fd | 816 | } |
af9cc401 YZ |
817 | /* only if matching snap context */ |
818 | pgsnapc = page_snap_context(page); | |
819 | if (pgsnapc != snapc) { | |
820 | dout("page snapc %p %lld != oldest %p %lld\n", | |
821 | pgsnapc, pgsnapc->seq, snapc, snapc->seq); | |
1582af2e YZ |
822 | if (!should_loop && |
823 | !ceph_wbc.head_snapc && | |
824 | wbc->sync_mode != WB_SYNC_NONE) | |
825 | should_loop = true; | |
1d3576fd | 826 | unlock_page(page); |
af9cc401 | 827 | continue; |
1d3576fd | 828 | } |
1f934b00 YZ |
829 | if (page_offset(page) >= ceph_wbc.i_size) { |
830 | dout("%p page eof %llu\n", | |
831 | page, ceph_wbc.i_size); | |
c95f1c5f EC |
832 | if ((ceph_wbc.size_stable || |
833 | page_offset(page) >= i_size_read(inode)) && | |
834 | clear_page_dirty_for_io(page)) | |
af9cc401 | 835 | mapping->a_ops->invalidatepage(page, |
8ff2d290 | 836 | 0, thp_size(page)); |
af9cc401 YZ |
837 | unlock_page(page); |
838 | continue; | |
839 | } | |
840 | if (strip_unit_end && (page->index > strip_unit_end)) { | |
841 | dout("end of strip unit %p\n", page); | |
1d3576fd SW |
842 | unlock_page(page); |
843 | break; | |
844 | } | |
845 | if (PageWriteback(page)) { | |
0713e5f2 YZ |
846 | if (wbc->sync_mode == WB_SYNC_NONE) { |
847 | dout("%p under writeback\n", page); | |
848 | unlock_page(page); | |
849 | continue; | |
850 | } | |
851 | dout("waiting on writeback %p\n", page); | |
852 | wait_on_page_writeback(page); | |
1d3576fd SW |
853 | } |
854 | ||
1d3576fd SW |
855 | if (!clear_page_dirty_for_io(page)) { |
856 | dout("%p !clear_page_dirty_for_io\n", page); | |
857 | unlock_page(page); | |
0713e5f2 | 858 | continue; |
1d3576fd SW |
859 | } |
860 | ||
e5975c7c AE |
861 | /* |
862 | * We have something to write. If this is | |
863 | * the first locked page this time through, | |
5b64640c YZ |
864 | * calculate max possinle write size and |
865 | * allocate a page array | |
e5975c7c | 866 | */ |
1d3576fd | 867 | if (locked_pages == 0) { |
5b64640c YZ |
868 | u64 objnum; |
869 | u64 objoff; | |
dccbf080 | 870 | u32 xlen; |
5b64640c | 871 | |
1d3576fd | 872 | /* prepare async write request */ |
e5975c7c | 873 | offset = (u64)page_offset(page); |
dccbf080 ID |
874 | ceph_calc_file_object_mapping(&ci->i_layout, |
875 | offset, wsize, | |
876 | &objnum, &objoff, | |
877 | &xlen); | |
878 | len = xlen; | |
8c71897b | 879 | |
3fb99d48 | 880 | num_ops = 1; |
5b64640c | 881 | strip_unit_end = page->index + |
09cbfeaf | 882 | ((len - 1) >> PAGE_SHIFT); |
88486957 | 883 | |
5b64640c | 884 | BUG_ON(pages); |
88486957 | 885 | max_pages = calc_pages_for(0, (u64)len); |
6da2ec56 KC |
886 | pages = kmalloc_array(max_pages, |
887 | sizeof(*pages), | |
888 | GFP_NOFS); | |
88486957 | 889 | if (!pages) { |
a0102bda JL |
890 | from_pool = true; |
891 | pages = mempool_alloc(ceph_wb_pagevec_pool, GFP_NOFS); | |
e5975c7c | 892 | BUG_ON(!pages); |
88486957 | 893 | } |
5b64640c YZ |
894 | |
895 | len = 0; | |
896 | } else if (page->index != | |
09cbfeaf | 897 | (offset + len) >> PAGE_SHIFT) { |
a0102bda JL |
898 | if (num_ops >= (from_pool ? CEPH_OSD_SLAB_OPS : |
899 | CEPH_OSD_MAX_OPS)) { | |
5b64640c YZ |
900 | redirty_page_for_writepage(wbc, page); |
901 | unlock_page(page); | |
902 | break; | |
903 | } | |
904 | ||
905 | num_ops++; | |
906 | offset = (u64)page_offset(page); | |
907 | len = 0; | |
1d3576fd SW |
908 | } |
909 | ||
910 | /* note position of first page in pvec */ | |
1d3576fd SW |
911 | dout("%p will write page %p idx %lu\n", |
912 | inode, page, page->index); | |
2baba250 | 913 | |
5b64640c YZ |
914 | if (atomic_long_inc_return(&fsc->writeback_count) > |
915 | CONGESTION_ON_THRESH( | |
3d14c5d2 | 916 | fsc->mount_options->congestion_kb)) { |
09dc9fc2 | 917 | set_bdi_congested(inode_to_bdi(inode), |
213c99ee | 918 | BLK_RW_ASYNC); |
2baba250 YS |
919 | } |
920 | ||
0713e5f2 YZ |
921 | |
922 | pages[locked_pages++] = page; | |
923 | pvec.pages[i] = NULL; | |
924 | ||
8ff2d290 | 925 | len += thp_size(page); |
1d3576fd SW |
926 | } |
927 | ||
928 | /* did we get anything? */ | |
929 | if (!locked_pages) | |
930 | goto release_pvec_pages; | |
931 | if (i) { | |
0713e5f2 YZ |
932 | unsigned j, n = 0; |
933 | /* shift unused page to beginning of pvec */ | |
934 | for (j = 0; j < pvec_pages; j++) { | |
935 | if (!pvec.pages[j]) | |
936 | continue; | |
937 | if (n < j) | |
938 | pvec.pages[n] = pvec.pages[j]; | |
939 | n++; | |
940 | } | |
941 | pvec.nr = n; | |
1d3576fd SW |
942 | |
943 | if (pvec_pages && i == pvec_pages && | |
944 | locked_pages < max_pages) { | |
945 | dout("reached end pvec, trying for more\n"); | |
0713e5f2 | 946 | pagevec_release(&pvec); |
1d3576fd SW |
947 | goto get_more_pages; |
948 | } | |
1d3576fd SW |
949 | } |
950 | ||
5b64640c | 951 | new_request: |
e5975c7c | 952 | offset = page_offset(pages[0]); |
5b64640c YZ |
953 | len = wsize; |
954 | ||
955 | req = ceph_osdc_new_request(&fsc->client->osdc, | |
956 | &ci->i_layout, vino, | |
957 | offset, &len, 0, num_ops, | |
1f934b00 YZ |
958 | CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE, |
959 | snapc, ceph_wbc.truncate_seq, | |
960 | ceph_wbc.truncate_size, false); | |
5b64640c YZ |
961 | if (IS_ERR(req)) { |
962 | req = ceph_osdc_new_request(&fsc->client->osdc, | |
963 | &ci->i_layout, vino, | |
964 | offset, &len, 0, | |
965 | min(num_ops, | |
966 | CEPH_OSD_SLAB_OPS), | |
967 | CEPH_OSD_OP_WRITE, | |
54ea0046 | 968 | CEPH_OSD_FLAG_WRITE, |
1f934b00 YZ |
969 | snapc, ceph_wbc.truncate_seq, |
970 | ceph_wbc.truncate_size, true); | |
5b64640c | 971 | BUG_ON(IS_ERR(req)); |
e1966b49 | 972 | } |
5b64640c | 973 | BUG_ON(len < page_offset(pages[locked_pages - 1]) + |
8ff2d290 | 974 | thp_size(page) - offset); |
5b64640c YZ |
975 | |
976 | req->r_callback = writepages_finish; | |
977 | req->r_inode = inode; | |
1d3576fd | 978 | |
5b64640c YZ |
979 | /* Format the osd request message and submit the write */ |
980 | len = 0; | |
981 | data_pages = pages; | |
982 | op_idx = 0; | |
983 | for (i = 0; i < locked_pages; i++) { | |
984 | u64 cur_offset = page_offset(pages[i]); | |
985 | if (offset + len != cur_offset) { | |
3fb99d48 | 986 | if (op_idx + 1 == req->r_num_ops) |
5b64640c YZ |
987 | break; |
988 | osd_req_op_extent_dup_last(req, op_idx, | |
989 | cur_offset - offset); | |
990 | dout("writepages got pages at %llu~%llu\n", | |
991 | offset, len); | |
992 | osd_req_op_extent_osd_data_pages(req, op_idx, | |
993 | data_pages, len, 0, | |
a0102bda | 994 | from_pool, false); |
5b64640c | 995 | osd_req_op_extent_update(req, op_idx, len); |
e5975c7c | 996 | |
5b64640c YZ |
997 | len = 0; |
998 | offset = cur_offset; | |
999 | data_pages = pages + i; | |
1000 | op_idx++; | |
1001 | } | |
1002 | ||
1003 | set_page_writeback(pages[i]); | |
8ff2d290 | 1004 | len += thp_size(page); |
5b64640c YZ |
1005 | } |
1006 | ||
1f934b00 YZ |
1007 | if (ceph_wbc.size_stable) { |
1008 | len = min(len, ceph_wbc.i_size - offset); | |
5b64640c YZ |
1009 | } else if (i == locked_pages) { |
1010 | /* writepages_finish() clears writeback pages | |
1011 | * according to the data length, so make sure | |
1012 | * data length covers all locked pages */ | |
8ff2d290 | 1013 | u64 min_len = len + 1 - thp_size(page); |
1f934b00 YZ |
1014 | len = get_writepages_data_length(inode, pages[i - 1], |
1015 | offset); | |
5b64640c YZ |
1016 | len = max(len, min_len); |
1017 | } | |
1018 | dout("writepages got pages at %llu~%llu\n", offset, len); | |
e5975c7c | 1019 | |
5b64640c | 1020 | osd_req_op_extent_osd_data_pages(req, op_idx, data_pages, len, |
a0102bda | 1021 | 0, from_pool, false); |
5b64640c | 1022 | osd_req_op_extent_update(req, op_idx, len); |
e5975c7c | 1023 | |
5b64640c YZ |
1024 | BUG_ON(op_idx + 1 != req->r_num_ops); |
1025 | ||
a0102bda | 1026 | from_pool = false; |
5b64640c YZ |
1027 | if (i < locked_pages) { |
1028 | BUG_ON(num_ops <= req->r_num_ops); | |
1029 | num_ops -= req->r_num_ops; | |
5b64640c YZ |
1030 | locked_pages -= i; |
1031 | ||
1032 | /* allocate new pages array for next request */ | |
1033 | data_pages = pages; | |
6da2ec56 KC |
1034 | pages = kmalloc_array(locked_pages, sizeof(*pages), |
1035 | GFP_NOFS); | |
5b64640c | 1036 | if (!pages) { |
a0102bda JL |
1037 | from_pool = true; |
1038 | pages = mempool_alloc(ceph_wb_pagevec_pool, GFP_NOFS); | |
5b64640c YZ |
1039 | BUG_ON(!pages); |
1040 | } | |
1041 | memcpy(pages, data_pages + i, | |
1042 | locked_pages * sizeof(*pages)); | |
1043 | memset(data_pages + i, 0, | |
1044 | locked_pages * sizeof(*pages)); | |
1045 | } else { | |
1046 | BUG_ON(num_ops != req->r_num_ops); | |
1047 | index = pages[i - 1]->index + 1; | |
1048 | /* request message now owns the pages array */ | |
1049 | pages = NULL; | |
1050 | } | |
e5975c7c | 1051 | |
fac02ddf | 1052 | req->r_mtime = inode->i_mtime; |
9d6fcb08 SW |
1053 | rc = ceph_osdc_start_request(&fsc->client->osdc, req, true); |
1054 | BUG_ON(rc); | |
1d3576fd SW |
1055 | req = NULL; |
1056 | ||
5b64640c YZ |
1057 | wbc->nr_to_write -= i; |
1058 | if (pages) | |
1059 | goto new_request; | |
1060 | ||
2a2d927e YZ |
1061 | /* |
1062 | * We stop writing back only if we are not doing | |
1063 | * integrity sync. In case of integrity sync we have to | |
1064 | * keep going until we have written all the pages | |
1065 | * we tagged for writeback prior to entering this loop. | |
1066 | */ | |
1067 | if (wbc->nr_to_write <= 0 && wbc->sync_mode == WB_SYNC_NONE) | |
af9cc401 | 1068 | done = true; |
1d3576fd SW |
1069 | |
1070 | release_pvec_pages: | |
1071 | dout("pagevec_release on %d pages (%p)\n", (int)pvec.nr, | |
1072 | pvec.nr ? pvec.pages[0] : NULL); | |
1073 | pagevec_release(&pvec); | |
1d3576fd SW |
1074 | } |
1075 | ||
1076 | if (should_loop && !done) { | |
1077 | /* more to do; loop back to beginning of file */ | |
1078 | dout("writepages looping back to beginning of file\n"); | |
2a2d927e | 1079 | end = start_index - 1; /* OK even when start_index == 0 */ |
f275635e YZ |
1080 | |
1081 | /* to write dirty pages associated with next snapc, | |
1082 | * we need to wait until current writes complete */ | |
1083 | if (wbc->sync_mode != WB_SYNC_NONE && | |
1084 | start_index == 0 && /* all dirty pages were checked */ | |
1085 | !ceph_wbc.head_snapc) { | |
1086 | struct page *page; | |
1087 | unsigned i, nr; | |
1088 | index = 0; | |
1089 | while ((index <= end) && | |
1090 | (nr = pagevec_lookup_tag(&pvec, mapping, &index, | |
67fd707f | 1091 | PAGECACHE_TAG_WRITEBACK))) { |
f275635e YZ |
1092 | for (i = 0; i < nr; i++) { |
1093 | page = pvec.pages[i]; | |
1094 | if (page_snap_context(page) != snapc) | |
1095 | continue; | |
1096 | wait_on_page_writeback(page); | |
1097 | } | |
1098 | pagevec_release(&pvec); | |
1099 | cond_resched(); | |
1100 | } | |
1101 | } | |
1102 | ||
2a2d927e | 1103 | start_index = 0; |
1d3576fd SW |
1104 | index = 0; |
1105 | goto retry; | |
1106 | } | |
1107 | ||
1108 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1109 | mapping->writeback_index = index; | |
1110 | ||
1111 | out: | |
3ed97d63 | 1112 | ceph_osdc_put_request(req); |
2a2d927e YZ |
1113 | ceph_put_snap_context(last_snapc); |
1114 | dout("writepages dend - startone, rc = %d\n", rc); | |
1d3576fd SW |
1115 | return rc; |
1116 | } | |
1117 | ||
1118 | ||
1119 | ||
1120 | /* | |
1121 | * See if a given @snapc is either writeable, or already written. | |
1122 | */ | |
1123 | static int context_is_writeable_or_written(struct inode *inode, | |
1124 | struct ceph_snap_context *snapc) | |
1125 | { | |
05455e11 | 1126 | struct ceph_snap_context *oldest = get_oldest_context(inode, NULL, NULL); |
6298a337 SW |
1127 | int ret = !oldest || snapc->seq <= oldest->seq; |
1128 | ||
1129 | ceph_put_snap_context(oldest); | |
1130 | return ret; | |
1d3576fd SW |
1131 | } |
1132 | ||
18d620f0 JL |
1133 | /** |
1134 | * ceph_find_incompatible - find an incompatible context and return it | |
18d620f0 | 1135 | * @page: page being dirtied |
8f883c24 | 1136 | * |
18d620f0 JL |
1137 | * We are only allowed to write into/dirty a page if the page is |
1138 | * clean, or already dirty within the same snap context. Returns a | |
1139 | * conflicting context if there is one, NULL if there isn't, or a | |
1140 | * negative error code on other errors. | |
1141 | * | |
1142 | * Must be called with page lock held. | |
1d3576fd | 1143 | */ |
18d620f0 | 1144 | static struct ceph_snap_context * |
d45156bf | 1145 | ceph_find_incompatible(struct page *page) |
1d3576fd | 1146 | { |
d45156bf | 1147 | struct inode *inode = page->mapping->host; |
6c93df5d | 1148 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
1d3576fd | 1149 | struct ceph_inode_info *ci = ceph_inode(inode); |
1d3576fd | 1150 | |
50c9132d | 1151 | if (READ_ONCE(fsc->mount_state) >= CEPH_MOUNT_SHUTDOWN) { |
6c93df5d | 1152 | dout(" page %p forced umount\n", page); |
18d620f0 | 1153 | return ERR_PTR(-EIO); |
6c93df5d YZ |
1154 | } |
1155 | ||
18d620f0 JL |
1156 | for (;;) { |
1157 | struct ceph_snap_context *snapc, *oldest; | |
1158 | ||
1159 | wait_on_page_writeback(page); | |
1160 | ||
1161 | snapc = page_snap_context(page); | |
1162 | if (!snapc || snapc == ci->i_head_snapc) | |
1163 | break; | |
1d3576fd | 1164 | |
1d3576fd SW |
1165 | /* |
1166 | * this page is already dirty in another (older) snap | |
1167 | * context! is it writeable now? | |
1168 | */ | |
05455e11 | 1169 | oldest = get_oldest_context(inode, NULL, NULL); |
80e755fe | 1170 | if (snapc->seq > oldest->seq) { |
18d620f0 | 1171 | /* not writeable -- return it for the caller to deal with */ |
6298a337 | 1172 | ceph_put_snap_context(oldest); |
18d620f0 JL |
1173 | dout(" page %p snapc %p not current or oldest\n", page, snapc); |
1174 | return ceph_get_snap_context(snapc); | |
1d3576fd | 1175 | } |
6298a337 | 1176 | ceph_put_snap_context(oldest); |
1d3576fd SW |
1177 | |
1178 | /* yay, writeable, do it now (without dropping page lock) */ | |
18d620f0 JL |
1179 | dout(" page %p snapc %p not current, but oldest\n", page, snapc); |
1180 | if (clear_page_dirty_for_io(page)) { | |
1181 | int r = writepage_nounlock(page, NULL); | |
1182 | if (r < 0) | |
1183 | return ERR_PTR(r); | |
1184 | } | |
1185 | } | |
1186 | return NULL; | |
1187 | } | |
1188 | ||
d801327d JL |
1189 | static int ceph_netfs_check_write_begin(struct file *file, loff_t pos, unsigned int len, |
1190 | struct page *page, void **_fsdata) | |
1191 | { | |
1192 | struct inode *inode = file_inode(file); | |
1193 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1194 | struct ceph_snap_context *snapc; | |
1195 | ||
1196 | snapc = ceph_find_incompatible(page); | |
1197 | if (snapc) { | |
1198 | int r; | |
1199 | ||
1200 | unlock_page(page); | |
1201 | put_page(page); | |
1202 | if (IS_ERR(snapc)) | |
1203 | return PTR_ERR(snapc); | |
1204 | ||
1205 | ceph_queue_writeback(inode); | |
1206 | r = wait_event_killable(ci->i_cap_wq, | |
1207 | context_is_writeable_or_written(inode, snapc)); | |
1208 | ceph_put_snap_context(snapc); | |
1209 | return r == 0 ? -EAGAIN : r; | |
1210 | } | |
1211 | return 0; | |
1212 | } | |
1213 | ||
18d620f0 JL |
1214 | /* |
1215 | * We are only allowed to write into/dirty the page if the page is | |
1216 | * clean, or already dirty within the same snap context. | |
18d620f0 | 1217 | */ |
1cc16990 JL |
1218 | static int ceph_write_begin(struct file *file, struct address_space *mapping, |
1219 | loff_t pos, unsigned len, unsigned flags, | |
1220 | struct page **pagep, void **fsdata) | |
18d620f0 JL |
1221 | { |
1222 | struct inode *inode = file_inode(file); | |
1223 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1cc16990 JL |
1224 | struct page *page = NULL; |
1225 | pgoff_t index = pos >> PAGE_SHIFT; | |
d801327d | 1226 | int r; |
1d3576fd | 1227 | |
d801327d JL |
1228 | /* |
1229 | * Uninlining should have already been done and everything updated, EXCEPT | |
1230 | * for inline_version sent to the MDS. | |
1231 | */ | |
1232 | if (ci->i_inline_version != CEPH_INLINE_NONE) { | |
4a357f50 | 1233 | page = grab_cache_page_write_begin(mapping, index, flags); |
d801327d JL |
1234 | if (!page) |
1235 | return -ENOMEM; | |
4af6b225 | 1236 | |
1cc16990 | 1237 | /* |
d801327d JL |
1238 | * The inline_version on a new inode is set to 1. If that's the |
1239 | * case, then the page is brand new and isn't yet Uptodate. | |
1cc16990 | 1240 | */ |
d801327d JL |
1241 | r = 0; |
1242 | if (index == 0 && ci->i_inline_version != 1) { | |
1243 | if (!PageUptodate(page)) { | |
1244 | WARN_ONCE(1, "ceph: write_begin called on still-inlined inode (inline_version %llu)!\n", | |
1245 | ci->i_inline_version); | |
1246 | r = -EINVAL; | |
1247 | } | |
1248 | goto out; | |
1cc16990 | 1249 | } |
8ff2d290 | 1250 | zero_user_segment(page, 0, thp_size(page)); |
d801327d JL |
1251 | SetPageUptodate(page); |
1252 | goto out; | |
1cc16990 | 1253 | } |
4af6b225 | 1254 | |
d801327d JL |
1255 | r = netfs_write_begin(file, inode->i_mapping, pos, len, 0, &page, NULL, |
1256 | &ceph_netfs_read_ops, NULL); | |
1257 | out: | |
1258 | if (r == 0) | |
1259 | wait_on_page_fscache(page); | |
1cc16990 | 1260 | if (r < 0) { |
d801327d | 1261 | if (page) |
09cbfeaf | 1262 | put_page(page); |
1cc16990 | 1263 | } else { |
d801327d | 1264 | WARN_ON_ONCE(!PageLocked(page)); |
1cc16990 JL |
1265 | *pagep = page; |
1266 | } | |
4af6b225 YS |
1267 | return r; |
1268 | } | |
1269 | ||
1d3576fd SW |
1270 | /* |
1271 | * we don't do anything in here that simple_write_end doesn't do | |
5dda377c | 1272 | * except adjust dirty page accounting |
1d3576fd SW |
1273 | */ |
1274 | static int ceph_write_end(struct file *file, struct address_space *mapping, | |
1275 | loff_t pos, unsigned len, unsigned copied, | |
1276 | struct page *page, void *fsdata) | |
1277 | { | |
496ad9aa | 1278 | struct inode *inode = file_inode(file); |
efb0ca76 | 1279 | bool check_cap = false; |
1d3576fd SW |
1280 | |
1281 | dout("write_end file %p inode %p page %p %d~%d (%d)\n", file, | |
1282 | inode, page, (int)pos, (int)copied, (int)len); | |
1283 | ||
b9de313c | 1284 | if (!PageUptodate(page)) { |
ce3a8732 | 1285 | /* just return that nothing was copied on a short copy */ |
b9de313c AV |
1286 | if (copied < len) { |
1287 | copied = 0; | |
1288 | goto out; | |
1289 | } | |
1290 | SetPageUptodate(page); | |
1291 | } | |
1d3576fd SW |
1292 | |
1293 | /* did file size increase? */ | |
99c88e69 | 1294 | if (pos+copied > i_size_read(inode)) |
1d3576fd SW |
1295 | check_cap = ceph_inode_set_size(inode, pos+copied); |
1296 | ||
1d3576fd SW |
1297 | set_page_dirty(page); |
1298 | ||
b9de313c | 1299 | out: |
1d3576fd | 1300 | unlock_page(page); |
09cbfeaf | 1301 | put_page(page); |
1d3576fd SW |
1302 | |
1303 | if (check_cap) | |
1304 | ceph_check_caps(ceph_inode(inode), CHECK_CAPS_AUTHONLY, NULL); | |
1305 | ||
1306 | return copied; | |
1307 | } | |
1308 | ||
1309 | /* | |
1310 | * we set .direct_IO to indicate direct io is supported, but since we | |
1311 | * intercept O_DIRECT reads and writes early, this function should | |
1312 | * never get called. | |
1313 | */ | |
c8b8e32d | 1314 | static ssize_t ceph_direct_io(struct kiocb *iocb, struct iov_iter *iter) |
1d3576fd SW |
1315 | { |
1316 | WARN_ON(1); | |
1317 | return -EINVAL; | |
1318 | } | |
1319 | ||
1320 | const struct address_space_operations ceph_aops = { | |
1321 | .readpage = ceph_readpage, | |
49870056 | 1322 | .readahead = ceph_readahead, |
1d3576fd SW |
1323 | .writepage = ceph_writepage, |
1324 | .writepages = ceph_writepages_start, | |
1325 | .write_begin = ceph_write_begin, | |
1326 | .write_end = ceph_write_end, | |
1327 | .set_page_dirty = ceph_set_page_dirty, | |
1328 | .invalidatepage = ceph_invalidatepage, | |
1329 | .releasepage = ceph_releasepage, | |
1330 | .direct_IO = ceph_direct_io, | |
1331 | }; | |
1332 | ||
4f7e89f6 YZ |
1333 | static void ceph_block_sigs(sigset_t *oldset) |
1334 | { | |
1335 | sigset_t mask; | |
1336 | siginitsetinv(&mask, sigmask(SIGKILL)); | |
1337 | sigprocmask(SIG_BLOCK, &mask, oldset); | |
1338 | } | |
1339 | ||
1340 | static void ceph_restore_sigs(sigset_t *oldset) | |
1341 | { | |
1342 | sigprocmask(SIG_SETMASK, oldset, NULL); | |
1343 | } | |
1d3576fd SW |
1344 | |
1345 | /* | |
1346 | * vm ops | |
1347 | */ | |
24499847 | 1348 | static vm_fault_t ceph_filemap_fault(struct vm_fault *vmf) |
61f68816 | 1349 | { |
11bac800 | 1350 | struct vm_area_struct *vma = vmf->vma; |
61f68816 YZ |
1351 | struct inode *inode = file_inode(vma->vm_file); |
1352 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1353 | struct ceph_file_info *fi = vma->vm_file->private_data; | |
c403c3a2 | 1354 | loff_t off = (loff_t)vmf->pgoff << PAGE_SHIFT; |
24499847 | 1355 | int want, got, err; |
4f7e89f6 | 1356 | sigset_t oldset; |
24499847 | 1357 | vm_fault_t ret = VM_FAULT_SIGBUS; |
4f7e89f6 YZ |
1358 | |
1359 | ceph_block_sigs(&oldset); | |
61f68816 | 1360 | |
8ff2d290 JL |
1361 | dout("filemap_fault %p %llx.%llx %llu trying to get caps\n", |
1362 | inode, ceph_vinop(inode), off); | |
61f68816 YZ |
1363 | if (fi->fmode & CEPH_FILE_MODE_LAZY) |
1364 | want = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO; | |
1365 | else | |
1366 | want = CEPH_CAP_FILE_CACHE; | |
4f7e89f6 YZ |
1367 | |
1368 | got = 0; | |
e72968e1 | 1369 | err = ceph_get_caps(vma->vm_file, CEPH_CAP_FILE_RD, want, -1, &got); |
24499847 | 1370 | if (err < 0) |
4f7e89f6 | 1371 | goto out_restore; |
6ce026e4 | 1372 | |
8ff2d290 JL |
1373 | dout("filemap_fault %p %llu got cap refs on %s\n", |
1374 | inode, off, ceph_cap_string(got)); | |
61f68816 | 1375 | |
83701246 | 1376 | if ((got & (CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO)) || |
2b1ac852 | 1377 | ci->i_inline_version == CEPH_INLINE_NONE) { |
5d988308 YZ |
1378 | CEPH_DEFINE_RW_CONTEXT(rw_ctx, got); |
1379 | ceph_add_rw_context(fi, &rw_ctx); | |
11bac800 | 1380 | ret = filemap_fault(vmf); |
5d988308 | 1381 | ceph_del_rw_context(fi, &rw_ctx); |
8ff2d290 JL |
1382 | dout("filemap_fault %p %llu drop cap refs %s ret %x\n", |
1383 | inode, off, ceph_cap_string(got), ret); | |
2b1ac852 | 1384 | } else |
24499847 | 1385 | err = -EAGAIN; |
61f68816 | 1386 | |
61f68816 YZ |
1387 | ceph_put_cap_refs(ci, got); |
1388 | ||
24499847 | 1389 | if (err != -EAGAIN) |
4f7e89f6 | 1390 | goto out_restore; |
83701246 YZ |
1391 | |
1392 | /* read inline data */ | |
09cbfeaf | 1393 | if (off >= PAGE_SIZE) { |
83701246 YZ |
1394 | /* does not support inline data > PAGE_SIZE */ |
1395 | ret = VM_FAULT_SIGBUS; | |
1396 | } else { | |
83701246 | 1397 | struct address_space *mapping = inode->i_mapping; |
057ba5b2 JK |
1398 | struct page *page; |
1399 | ||
1400 | filemap_invalidate_lock_shared(mapping); | |
1401 | page = find_or_create_page(mapping, 0, | |
1402 | mapping_gfp_constraint(mapping, ~__GFP_FS)); | |
83701246 YZ |
1403 | if (!page) { |
1404 | ret = VM_FAULT_OOM; | |
4f7e89f6 | 1405 | goto out_inline; |
83701246 | 1406 | } |
24499847 | 1407 | err = __ceph_do_getattr(inode, page, |
83701246 | 1408 | CEPH_STAT_CAP_INLINE_DATA, true); |
24499847 | 1409 | if (err < 0 || off >= i_size_read(inode)) { |
83701246 | 1410 | unlock_page(page); |
09cbfeaf | 1411 | put_page(page); |
c64a2b05 | 1412 | ret = vmf_error(err); |
4f7e89f6 | 1413 | goto out_inline; |
83701246 | 1414 | } |
24499847 SJ |
1415 | if (err < PAGE_SIZE) |
1416 | zero_user_segment(page, err, PAGE_SIZE); | |
83701246 YZ |
1417 | else |
1418 | flush_dcache_page(page); | |
1419 | SetPageUptodate(page); | |
1420 | vmf->page = page; | |
1421 | ret = VM_FAULT_MAJOR | VM_FAULT_LOCKED; | |
4f7e89f6 | 1422 | out_inline: |
057ba5b2 | 1423 | filemap_invalidate_unlock_shared(mapping); |
8ff2d290 JL |
1424 | dout("filemap_fault %p %llu read inline data ret %x\n", |
1425 | inode, off, ret); | |
83701246 | 1426 | } |
4f7e89f6 YZ |
1427 | out_restore: |
1428 | ceph_restore_sigs(&oldset); | |
24499847 SJ |
1429 | if (err < 0) |
1430 | ret = vmf_error(err); | |
6ce026e4 | 1431 | |
61f68816 YZ |
1432 | return ret; |
1433 | } | |
1d3576fd | 1434 | |
24499847 | 1435 | static vm_fault_t ceph_page_mkwrite(struct vm_fault *vmf) |
1d3576fd | 1436 | { |
11bac800 | 1437 | struct vm_area_struct *vma = vmf->vma; |
496ad9aa | 1438 | struct inode *inode = file_inode(vma->vm_file); |
61f68816 YZ |
1439 | struct ceph_inode_info *ci = ceph_inode(inode); |
1440 | struct ceph_file_info *fi = vma->vm_file->private_data; | |
f66fd9f0 | 1441 | struct ceph_cap_flush *prealloc_cf; |
61f68816 | 1442 | struct page *page = vmf->page; |
6285bc23 | 1443 | loff_t off = page_offset(page); |
61f68816 YZ |
1444 | loff_t size = i_size_read(inode); |
1445 | size_t len; | |
24499847 | 1446 | int want, got, err; |
4f7e89f6 | 1447 | sigset_t oldset; |
24499847 | 1448 | vm_fault_t ret = VM_FAULT_SIGBUS; |
3ca9c3bd | 1449 | |
f66fd9f0 YZ |
1450 | prealloc_cf = ceph_alloc_cap_flush(); |
1451 | if (!prealloc_cf) | |
6ce026e4 | 1452 | return VM_FAULT_OOM; |
f66fd9f0 | 1453 | |
249c1df5 | 1454 | sb_start_pagefault(inode->i_sb); |
4f7e89f6 | 1455 | ceph_block_sigs(&oldset); |
f66fd9f0 | 1456 | |
28127bdd YZ |
1457 | if (ci->i_inline_version != CEPH_INLINE_NONE) { |
1458 | struct page *locked_page = NULL; | |
1459 | if (off == 0) { | |
1460 | lock_page(page); | |
1461 | locked_page = page; | |
1462 | } | |
24499847 | 1463 | err = ceph_uninline_data(vma->vm_file, locked_page); |
28127bdd YZ |
1464 | if (locked_page) |
1465 | unlock_page(locked_page); | |
24499847 | 1466 | if (err < 0) |
f66fd9f0 | 1467 | goto out_free; |
28127bdd YZ |
1468 | } |
1469 | ||
8ff2d290 JL |
1470 | if (off + thp_size(page) <= size) |
1471 | len = thp_size(page); | |
1d3576fd | 1472 | else |
8ff2d290 | 1473 | len = offset_in_thp(page, size); |
1d3576fd | 1474 | |
61f68816 YZ |
1475 | dout("page_mkwrite %p %llx.%llx %llu~%zd getting caps i_size %llu\n", |
1476 | inode, ceph_vinop(inode), off, len, size); | |
1477 | if (fi->fmode & CEPH_FILE_MODE_LAZY) | |
1478 | want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO; | |
1479 | else | |
1480 | want = CEPH_CAP_FILE_BUFFER; | |
4f7e89f6 YZ |
1481 | |
1482 | got = 0; | |
e72968e1 | 1483 | err = ceph_get_caps(vma->vm_file, CEPH_CAP_FILE_WR, want, off + len, &got); |
24499847 | 1484 | if (err < 0) |
4f7e89f6 | 1485 | goto out_free; |
6ce026e4 | 1486 | |
61f68816 YZ |
1487 | dout("page_mkwrite %p %llu~%zd got cap refs on %s\n", |
1488 | inode, off, len, ceph_cap_string(got)); | |
1489 | ||
1490 | /* Update time before taking page lock */ | |
1491 | file_update_time(vma->vm_file); | |
5c308356 | 1492 | inode_inc_iversion_raw(inode); |
4af6b225 | 1493 | |
f0b33df5 | 1494 | do { |
d45156bf JL |
1495 | struct ceph_snap_context *snapc; |
1496 | ||
f0b33df5 | 1497 | lock_page(page); |
4af6b225 | 1498 | |
cb03c143 | 1499 | if (page_mkwrite_check_truncate(page, inode) < 0) { |
f0b33df5 YZ |
1500 | unlock_page(page); |
1501 | ret = VM_FAULT_NOPAGE; | |
1502 | break; | |
1503 | } | |
1504 | ||
d45156bf JL |
1505 | snapc = ceph_find_incompatible(page); |
1506 | if (!snapc) { | |
f0b33df5 YZ |
1507 | /* success. we'll keep the page locked. */ |
1508 | set_page_dirty(page); | |
1509 | ret = VM_FAULT_LOCKED; | |
d45156bf JL |
1510 | break; |
1511 | } | |
1512 | ||
1513 | unlock_page(page); | |
1514 | ||
1515 | if (IS_ERR(snapc)) { | |
1516 | ret = VM_FAULT_SIGBUS; | |
1517 | break; | |
f0b33df5 | 1518 | } |
d45156bf JL |
1519 | |
1520 | ceph_queue_writeback(inode); | |
1521 | err = wait_event_killable(ci->i_cap_wq, | |
1522 | context_is_writeable_or_written(inode, snapc)); | |
1523 | ceph_put_snap_context(snapc); | |
1524 | } while (err == 0); | |
4af6b225 | 1525 | |
28127bdd YZ |
1526 | if (ret == VM_FAULT_LOCKED || |
1527 | ci->i_inline_version != CEPH_INLINE_NONE) { | |
61f68816 YZ |
1528 | int dirty; |
1529 | spin_lock(&ci->i_ceph_lock); | |
28127bdd | 1530 | ci->i_inline_version = CEPH_INLINE_NONE; |
f66fd9f0 YZ |
1531 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, |
1532 | &prealloc_cf); | |
61f68816 YZ |
1533 | spin_unlock(&ci->i_ceph_lock); |
1534 | if (dirty) | |
1535 | __mark_inode_dirty(inode, dirty); | |
1536 | } | |
1537 | ||
24499847 | 1538 | dout("page_mkwrite %p %llu~%zd dropping cap refs on %s ret %x\n", |
61f68816 | 1539 | inode, off, len, ceph_cap_string(got), ret); |
a8810cdc | 1540 | ceph_put_cap_refs_async(ci, got); |
f66fd9f0 | 1541 | out_free: |
4f7e89f6 | 1542 | ceph_restore_sigs(&oldset); |
249c1df5 | 1543 | sb_end_pagefault(inode->i_sb); |
f66fd9f0 | 1544 | ceph_free_cap_flush(prealloc_cf); |
24499847 SJ |
1545 | if (err < 0) |
1546 | ret = vmf_error(err); | |
1d3576fd SW |
1547 | return ret; |
1548 | } | |
1549 | ||
31c542a1 YZ |
1550 | void ceph_fill_inline_data(struct inode *inode, struct page *locked_page, |
1551 | char *data, size_t len) | |
1552 | { | |
1553 | struct address_space *mapping = inode->i_mapping; | |
1554 | struct page *page; | |
1555 | ||
1556 | if (locked_page) { | |
1557 | page = locked_page; | |
1558 | } else { | |
1559 | if (i_size_read(inode) == 0) | |
1560 | return; | |
1561 | page = find_or_create_page(mapping, 0, | |
c62d2555 MH |
1562 | mapping_gfp_constraint(mapping, |
1563 | ~__GFP_FS)); | |
31c542a1 YZ |
1564 | if (!page) |
1565 | return; | |
1566 | if (PageUptodate(page)) { | |
1567 | unlock_page(page); | |
09cbfeaf | 1568 | put_page(page); |
31c542a1 YZ |
1569 | return; |
1570 | } | |
1571 | } | |
1572 | ||
0668ff52 | 1573 | dout("fill_inline_data %p %llx.%llx len %zu locked_page %p\n", |
31c542a1 YZ |
1574 | inode, ceph_vinop(inode), len, locked_page); |
1575 | ||
1576 | if (len > 0) { | |
1577 | void *kaddr = kmap_atomic(page); | |
1578 | memcpy(kaddr, data, len); | |
1579 | kunmap_atomic(kaddr); | |
1580 | } | |
1581 | ||
1582 | if (page != locked_page) { | |
09cbfeaf KS |
1583 | if (len < PAGE_SIZE) |
1584 | zero_user_segment(page, len, PAGE_SIZE); | |
31c542a1 YZ |
1585 | else |
1586 | flush_dcache_page(page); | |
1587 | ||
1588 | SetPageUptodate(page); | |
1589 | unlock_page(page); | |
09cbfeaf | 1590 | put_page(page); |
31c542a1 YZ |
1591 | } |
1592 | } | |
1593 | ||
28127bdd YZ |
1594 | int ceph_uninline_data(struct file *filp, struct page *locked_page) |
1595 | { | |
1596 | struct inode *inode = file_inode(filp); | |
1597 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1598 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); | |
1599 | struct ceph_osd_request *req; | |
1600 | struct page *page = NULL; | |
1601 | u64 len, inline_version; | |
1602 | int err = 0; | |
1603 | bool from_pagecache = false; | |
1604 | ||
1605 | spin_lock(&ci->i_ceph_lock); | |
1606 | inline_version = ci->i_inline_version; | |
1607 | spin_unlock(&ci->i_ceph_lock); | |
1608 | ||
1609 | dout("uninline_data %p %llx.%llx inline_version %llu\n", | |
1610 | inode, ceph_vinop(inode), inline_version); | |
1611 | ||
1612 | if (inline_version == 1 || /* initial version, no data */ | |
1613 | inline_version == CEPH_INLINE_NONE) | |
1614 | goto out; | |
1615 | ||
1616 | if (locked_page) { | |
1617 | page = locked_page; | |
1618 | WARN_ON(!PageUptodate(page)); | |
1619 | } else if (ceph_caps_issued(ci) & | |
1620 | (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) { | |
1621 | page = find_get_page(inode->i_mapping, 0); | |
1622 | if (page) { | |
1623 | if (PageUptodate(page)) { | |
1624 | from_pagecache = true; | |
1625 | lock_page(page); | |
1626 | } else { | |
09cbfeaf | 1627 | put_page(page); |
28127bdd YZ |
1628 | page = NULL; |
1629 | } | |
1630 | } | |
1631 | } | |
1632 | ||
1633 | if (page) { | |
1634 | len = i_size_read(inode); | |
09cbfeaf KS |
1635 | if (len > PAGE_SIZE) |
1636 | len = PAGE_SIZE; | |
28127bdd YZ |
1637 | } else { |
1638 | page = __page_cache_alloc(GFP_NOFS); | |
1639 | if (!page) { | |
1640 | err = -ENOMEM; | |
1641 | goto out; | |
1642 | } | |
1643 | err = __ceph_do_getattr(inode, page, | |
1644 | CEPH_STAT_CAP_INLINE_DATA, true); | |
1645 | if (err < 0) { | |
1646 | /* no inline data */ | |
1647 | if (err == -ENODATA) | |
1648 | err = 0; | |
1649 | goto out; | |
1650 | } | |
1651 | len = err; | |
1652 | } | |
1653 | ||
1654 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
1655 | ceph_vino(inode), 0, &len, 0, 1, | |
54ea0046 | 1656 | CEPH_OSD_OP_CREATE, CEPH_OSD_FLAG_WRITE, |
34b759b4 | 1657 | NULL, 0, 0, false); |
28127bdd YZ |
1658 | if (IS_ERR(req)) { |
1659 | err = PTR_ERR(req); | |
1660 | goto out; | |
1661 | } | |
1662 | ||
fac02ddf | 1663 | req->r_mtime = inode->i_mtime; |
28127bdd YZ |
1664 | err = ceph_osdc_start_request(&fsc->client->osdc, req, false); |
1665 | if (!err) | |
1666 | err = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
1667 | ceph_osdc_put_request(req); | |
1668 | if (err < 0) | |
1669 | goto out; | |
1670 | ||
1671 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
1672 | ceph_vino(inode), 0, &len, 1, 3, | |
54ea0046 | 1673 | CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE, |
34b759b4 ID |
1674 | NULL, ci->i_truncate_seq, |
1675 | ci->i_truncate_size, false); | |
28127bdd YZ |
1676 | if (IS_ERR(req)) { |
1677 | err = PTR_ERR(req); | |
1678 | goto out; | |
1679 | } | |
1680 | ||
1681 | osd_req_op_extent_osd_data_pages(req, 1, &page, len, 0, false, false); | |
1682 | ||
ec137c10 YZ |
1683 | { |
1684 | __le64 xattr_buf = cpu_to_le64(inline_version); | |
1685 | err = osd_req_op_xattr_init(req, 0, CEPH_OSD_OP_CMPXATTR, | |
1686 | "inline_version", &xattr_buf, | |
1687 | sizeof(xattr_buf), | |
1688 | CEPH_OSD_CMPXATTR_OP_GT, | |
1689 | CEPH_OSD_CMPXATTR_MODE_U64); | |
1690 | if (err) | |
1691 | goto out_put; | |
1692 | } | |
1693 | ||
1694 | { | |
1695 | char xattr_buf[32]; | |
1696 | int xattr_len = snprintf(xattr_buf, sizeof(xattr_buf), | |
1697 | "%llu", inline_version); | |
1698 | err = osd_req_op_xattr_init(req, 2, CEPH_OSD_OP_SETXATTR, | |
1699 | "inline_version", | |
1700 | xattr_buf, xattr_len, 0, 0); | |
1701 | if (err) | |
1702 | goto out_put; | |
1703 | } | |
28127bdd | 1704 | |
fac02ddf | 1705 | req->r_mtime = inode->i_mtime; |
28127bdd YZ |
1706 | err = ceph_osdc_start_request(&fsc->client->osdc, req, false); |
1707 | if (!err) | |
1708 | err = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
97e27aaa | 1709 | |
8ae99ae2 | 1710 | ceph_update_write_metrics(&fsc->mdsc->metric, req->r_start_latency, |
903f4fec | 1711 | req->r_end_latency, len, err); |
97e27aaa | 1712 | |
28127bdd YZ |
1713 | out_put: |
1714 | ceph_osdc_put_request(req); | |
1715 | if (err == -ECANCELED) | |
1716 | err = 0; | |
1717 | out: | |
1718 | if (page && page != locked_page) { | |
1719 | if (from_pagecache) { | |
1720 | unlock_page(page); | |
09cbfeaf | 1721 | put_page(page); |
28127bdd YZ |
1722 | } else |
1723 | __free_pages(page, 0); | |
1724 | } | |
1725 | ||
1726 | dout("uninline_data %p %llx.%llx inline_version %llu = %d\n", | |
1727 | inode, ceph_vinop(inode), inline_version, err); | |
1728 | return err; | |
1729 | } | |
1730 | ||
7cbea8dc | 1731 | static const struct vm_operations_struct ceph_vmops = { |
61f68816 | 1732 | .fault = ceph_filemap_fault, |
1d3576fd SW |
1733 | .page_mkwrite = ceph_page_mkwrite, |
1734 | }; | |
1735 | ||
1736 | int ceph_mmap(struct file *file, struct vm_area_struct *vma) | |
1737 | { | |
1738 | struct address_space *mapping = file->f_mapping; | |
1739 | ||
1740 | if (!mapping->a_ops->readpage) | |
1741 | return -ENOEXEC; | |
1742 | file_accessed(file); | |
1743 | vma->vm_ops = &ceph_vmops; | |
1d3576fd SW |
1744 | return 0; |
1745 | } | |
10183a69 YZ |
1746 | |
1747 | enum { | |
1748 | POOL_READ = 1, | |
1749 | POOL_WRITE = 2, | |
1750 | }; | |
1751 | ||
779fe0fb YZ |
1752 | static int __ceph_pool_perm_get(struct ceph_inode_info *ci, |
1753 | s64 pool, struct ceph_string *pool_ns) | |
10183a69 YZ |
1754 | { |
1755 | struct ceph_fs_client *fsc = ceph_inode_to_client(&ci->vfs_inode); | |
1756 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
1757 | struct ceph_osd_request *rd_req = NULL, *wr_req = NULL; | |
1758 | struct rb_node **p, *parent; | |
1759 | struct ceph_pool_perm *perm; | |
1760 | struct page **pages; | |
779fe0fb | 1761 | size_t pool_ns_len; |
10183a69 YZ |
1762 | int err = 0, err2 = 0, have = 0; |
1763 | ||
1764 | down_read(&mdsc->pool_perm_rwsem); | |
1765 | p = &mdsc->pool_perm_tree.rb_node; | |
1766 | while (*p) { | |
1767 | perm = rb_entry(*p, struct ceph_pool_perm, node); | |
1768 | if (pool < perm->pool) | |
1769 | p = &(*p)->rb_left; | |
1770 | else if (pool > perm->pool) | |
1771 | p = &(*p)->rb_right; | |
1772 | else { | |
779fe0fb YZ |
1773 | int ret = ceph_compare_string(pool_ns, |
1774 | perm->pool_ns, | |
1775 | perm->pool_ns_len); | |
1776 | if (ret < 0) | |
1777 | p = &(*p)->rb_left; | |
1778 | else if (ret > 0) | |
1779 | p = &(*p)->rb_right; | |
1780 | else { | |
1781 | have = perm->perm; | |
1782 | break; | |
1783 | } | |
10183a69 YZ |
1784 | } |
1785 | } | |
1786 | up_read(&mdsc->pool_perm_rwsem); | |
1787 | if (*p) | |
1788 | goto out; | |
1789 | ||
779fe0fb YZ |
1790 | if (pool_ns) |
1791 | dout("__ceph_pool_perm_get pool %lld ns %.*s no perm cached\n", | |
1792 | pool, (int)pool_ns->len, pool_ns->str); | |
1793 | else | |
1794 | dout("__ceph_pool_perm_get pool %lld no perm cached\n", pool); | |
10183a69 YZ |
1795 | |
1796 | down_write(&mdsc->pool_perm_rwsem); | |
779fe0fb | 1797 | p = &mdsc->pool_perm_tree.rb_node; |
10183a69 YZ |
1798 | parent = NULL; |
1799 | while (*p) { | |
1800 | parent = *p; | |
1801 | perm = rb_entry(parent, struct ceph_pool_perm, node); | |
1802 | if (pool < perm->pool) | |
1803 | p = &(*p)->rb_left; | |
1804 | else if (pool > perm->pool) | |
1805 | p = &(*p)->rb_right; | |
1806 | else { | |
779fe0fb YZ |
1807 | int ret = ceph_compare_string(pool_ns, |
1808 | perm->pool_ns, | |
1809 | perm->pool_ns_len); | |
1810 | if (ret < 0) | |
1811 | p = &(*p)->rb_left; | |
1812 | else if (ret > 0) | |
1813 | p = &(*p)->rb_right; | |
1814 | else { | |
1815 | have = perm->perm; | |
1816 | break; | |
1817 | } | |
10183a69 YZ |
1818 | } |
1819 | } | |
1820 | if (*p) { | |
1821 | up_write(&mdsc->pool_perm_rwsem); | |
1822 | goto out; | |
1823 | } | |
1824 | ||
34b759b4 | 1825 | rd_req = ceph_osdc_alloc_request(&fsc->client->osdc, NULL, |
10183a69 YZ |
1826 | 1, false, GFP_NOFS); |
1827 | if (!rd_req) { | |
1828 | err = -ENOMEM; | |
1829 | goto out_unlock; | |
1830 | } | |
1831 | ||
1832 | rd_req->r_flags = CEPH_OSD_FLAG_READ; | |
1833 | osd_req_op_init(rd_req, 0, CEPH_OSD_OP_STAT, 0); | |
1834 | rd_req->r_base_oloc.pool = pool; | |
779fe0fb YZ |
1835 | if (pool_ns) |
1836 | rd_req->r_base_oloc.pool_ns = ceph_get_string(pool_ns); | |
d30291b9 | 1837 | ceph_oid_printf(&rd_req->r_base_oid, "%llx.00000000", ci->i_vino.ino); |
10183a69 | 1838 | |
13d1ad16 ID |
1839 | err = ceph_osdc_alloc_messages(rd_req, GFP_NOFS); |
1840 | if (err) | |
1841 | goto out_unlock; | |
10183a69 | 1842 | |
34b759b4 | 1843 | wr_req = ceph_osdc_alloc_request(&fsc->client->osdc, NULL, |
10183a69 YZ |
1844 | 1, false, GFP_NOFS); |
1845 | if (!wr_req) { | |
1846 | err = -ENOMEM; | |
1847 | goto out_unlock; | |
1848 | } | |
1849 | ||
54ea0046 | 1850 | wr_req->r_flags = CEPH_OSD_FLAG_WRITE; |
10183a69 | 1851 | osd_req_op_init(wr_req, 0, CEPH_OSD_OP_CREATE, CEPH_OSD_OP_FLAG_EXCL); |
63244fa1 | 1852 | ceph_oloc_copy(&wr_req->r_base_oloc, &rd_req->r_base_oloc); |
d30291b9 | 1853 | ceph_oid_copy(&wr_req->r_base_oid, &rd_req->r_base_oid); |
10183a69 | 1854 | |
13d1ad16 ID |
1855 | err = ceph_osdc_alloc_messages(wr_req, GFP_NOFS); |
1856 | if (err) | |
1857 | goto out_unlock; | |
10183a69 YZ |
1858 | |
1859 | /* one page should be large enough for STAT data */ | |
1860 | pages = ceph_alloc_page_vector(1, GFP_KERNEL); | |
1861 | if (IS_ERR(pages)) { | |
1862 | err = PTR_ERR(pages); | |
1863 | goto out_unlock; | |
1864 | } | |
1865 | ||
1866 | osd_req_op_raw_data_in_pages(rd_req, 0, pages, PAGE_SIZE, | |
1867 | 0, false, true); | |
10183a69 YZ |
1868 | err = ceph_osdc_start_request(&fsc->client->osdc, rd_req, false); |
1869 | ||
fac02ddf | 1870 | wr_req->r_mtime = ci->vfs_inode.i_mtime; |
10183a69 YZ |
1871 | err2 = ceph_osdc_start_request(&fsc->client->osdc, wr_req, false); |
1872 | ||
1873 | if (!err) | |
1874 | err = ceph_osdc_wait_request(&fsc->client->osdc, rd_req); | |
1875 | if (!err2) | |
1876 | err2 = ceph_osdc_wait_request(&fsc->client->osdc, wr_req); | |
1877 | ||
1878 | if (err >= 0 || err == -ENOENT) | |
1879 | have |= POOL_READ; | |
131d7eb4 | 1880 | else if (err != -EPERM) { |
0b98acd6 ID |
1881 | if (err == -EBLOCKLISTED) |
1882 | fsc->blocklisted = true; | |
10183a69 | 1883 | goto out_unlock; |
131d7eb4 | 1884 | } |
10183a69 YZ |
1885 | |
1886 | if (err2 == 0 || err2 == -EEXIST) | |
1887 | have |= POOL_WRITE; | |
1888 | else if (err2 != -EPERM) { | |
0b98acd6 ID |
1889 | if (err2 == -EBLOCKLISTED) |
1890 | fsc->blocklisted = true; | |
10183a69 YZ |
1891 | err = err2; |
1892 | goto out_unlock; | |
1893 | } | |
1894 | ||
779fe0fb YZ |
1895 | pool_ns_len = pool_ns ? pool_ns->len : 0; |
1896 | perm = kmalloc(sizeof(*perm) + pool_ns_len + 1, GFP_NOFS); | |
10183a69 YZ |
1897 | if (!perm) { |
1898 | err = -ENOMEM; | |
1899 | goto out_unlock; | |
1900 | } | |
1901 | ||
1902 | perm->pool = pool; | |
1903 | perm->perm = have; | |
779fe0fb YZ |
1904 | perm->pool_ns_len = pool_ns_len; |
1905 | if (pool_ns_len > 0) | |
1906 | memcpy(perm->pool_ns, pool_ns->str, pool_ns_len); | |
1907 | perm->pool_ns[pool_ns_len] = 0; | |
1908 | ||
10183a69 YZ |
1909 | rb_link_node(&perm->node, parent, p); |
1910 | rb_insert_color(&perm->node, &mdsc->pool_perm_tree); | |
1911 | err = 0; | |
1912 | out_unlock: | |
1913 | up_write(&mdsc->pool_perm_rwsem); | |
1914 | ||
3ed97d63 ID |
1915 | ceph_osdc_put_request(rd_req); |
1916 | ceph_osdc_put_request(wr_req); | |
10183a69 YZ |
1917 | out: |
1918 | if (!err) | |
1919 | err = have; | |
779fe0fb YZ |
1920 | if (pool_ns) |
1921 | dout("__ceph_pool_perm_get pool %lld ns %.*s result = %d\n", | |
1922 | pool, (int)pool_ns->len, pool_ns->str, err); | |
1923 | else | |
1924 | dout("__ceph_pool_perm_get pool %lld result = %d\n", pool, err); | |
10183a69 YZ |
1925 | return err; |
1926 | } | |
1927 | ||
5e3ded1b | 1928 | int ceph_pool_perm_check(struct inode *inode, int need) |
10183a69 | 1929 | { |
5e3ded1b | 1930 | struct ceph_inode_info *ci = ceph_inode(inode); |
779fe0fb | 1931 | struct ceph_string *pool_ns; |
5e3ded1b | 1932 | s64 pool; |
10183a69 YZ |
1933 | int ret, flags; |
1934 | ||
e9b22501 JL |
1935 | /* Only need to do this for regular files */ |
1936 | if (!S_ISREG(inode->i_mode)) | |
1937 | return 0; | |
1938 | ||
80e80fbb YZ |
1939 | if (ci->i_vino.snap != CEPH_NOSNAP) { |
1940 | /* | |
1941 | * Pool permission check needs to write to the first object. | |
1942 | * But for snapshot, head of the first object may have alread | |
1943 | * been deleted. Skip check to avoid creating orphan object. | |
1944 | */ | |
1945 | return 0; | |
1946 | } | |
1947 | ||
5e3ded1b | 1948 | if (ceph_test_mount_opt(ceph_inode_to_client(inode), |
10183a69 YZ |
1949 | NOPOOLPERM)) |
1950 | return 0; | |
1951 | ||
1952 | spin_lock(&ci->i_ceph_lock); | |
1953 | flags = ci->i_ceph_flags; | |
7627151e | 1954 | pool = ci->i_layout.pool_id; |
10183a69 YZ |
1955 | spin_unlock(&ci->i_ceph_lock); |
1956 | check: | |
1957 | if (flags & CEPH_I_POOL_PERM) { | |
1958 | if ((need & CEPH_CAP_FILE_RD) && !(flags & CEPH_I_POOL_RD)) { | |
7627151e | 1959 | dout("ceph_pool_perm_check pool %lld no read perm\n", |
10183a69 YZ |
1960 | pool); |
1961 | return -EPERM; | |
1962 | } | |
1963 | if ((need & CEPH_CAP_FILE_WR) && !(flags & CEPH_I_POOL_WR)) { | |
7627151e | 1964 | dout("ceph_pool_perm_check pool %lld no write perm\n", |
10183a69 YZ |
1965 | pool); |
1966 | return -EPERM; | |
1967 | } | |
1968 | return 0; | |
1969 | } | |
1970 | ||
779fe0fb YZ |
1971 | pool_ns = ceph_try_get_string(ci->i_layout.pool_ns); |
1972 | ret = __ceph_pool_perm_get(ci, pool, pool_ns); | |
1973 | ceph_put_string(pool_ns); | |
10183a69 YZ |
1974 | if (ret < 0) |
1975 | return ret; | |
1976 | ||
1977 | flags = CEPH_I_POOL_PERM; | |
1978 | if (ret & POOL_READ) | |
1979 | flags |= CEPH_I_POOL_RD; | |
1980 | if (ret & POOL_WRITE) | |
1981 | flags |= CEPH_I_POOL_WR; | |
1982 | ||
1983 | spin_lock(&ci->i_ceph_lock); | |
779fe0fb YZ |
1984 | if (pool == ci->i_layout.pool_id && |
1985 | pool_ns == rcu_dereference_raw(ci->i_layout.pool_ns)) { | |
1986 | ci->i_ceph_flags |= flags; | |
10183a69 | 1987 | } else { |
7627151e | 1988 | pool = ci->i_layout.pool_id; |
10183a69 YZ |
1989 | flags = ci->i_ceph_flags; |
1990 | } | |
1991 | spin_unlock(&ci->i_ceph_lock); | |
1992 | goto check; | |
1993 | } | |
1994 | ||
1995 | void ceph_pool_perm_destroy(struct ceph_mds_client *mdsc) | |
1996 | { | |
1997 | struct ceph_pool_perm *perm; | |
1998 | struct rb_node *n; | |
1999 | ||
2000 | while (!RB_EMPTY_ROOT(&mdsc->pool_perm_tree)) { | |
2001 | n = rb_first(&mdsc->pool_perm_tree); | |
2002 | perm = rb_entry(n, struct ceph_pool_perm, node); | |
2003 | rb_erase(n, &mdsc->pool_perm_tree); | |
2004 | kfree(perm); | |
2005 | } | |
2006 | } |