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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> | |
d7bdba1c | 7 | #include <linux/swap.h> |
1d3576fd | 8 | #include <linux/pagemap.h> |
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" |
f0fe1e54 | 21 | #include "crypto.h" |
3d14c5d2 | 22 | #include <linux/ceph/osd_client.h> |
08c1ac50 | 23 | #include <linux/ceph/striper.h> |
1d3576fd SW |
24 | |
25 | /* | |
26 | * Ceph address space ops. | |
27 | * | |
28 | * There are a few funny things going on here. | |
29 | * | |
30 | * The page->private field is used to reference a struct | |
31 | * ceph_snap_context for _every_ dirty page. This indicates which | |
32 | * snapshot the page was logically dirtied in, and thus which snap | |
33 | * context needs to be associated with the osd write during writeback. | |
34 | * | |
35 | * Similarly, struct ceph_inode_info maintains a set of counters to | |
25985edc | 36 | * count dirty pages on the inode. In the absence of snapshots, |
1d3576fd SW |
37 | * i_wrbuffer_ref == i_wrbuffer_ref_head == the dirty page count. |
38 | * | |
39 | * When a snapshot is taken (that is, when the client receives | |
40 | * notification that a snapshot was taken), each inode with caps and | |
41 | * with dirty pages (dirty pages implies there is a cap) gets a new | |
42 | * ceph_cap_snap in the i_cap_snaps list (which is sorted in ascending | |
43 | * order, new snaps go to the tail). The i_wrbuffer_ref_head count is | |
44 | * moved to capsnap->dirty. (Unless a sync write is currently in | |
45 | * progress. In that case, the capsnap is said to be "pending", new | |
46 | * writes cannot start, and the capsnap isn't "finalized" until the | |
47 | * write completes (or fails) and a final size/mtime for the inode for | |
48 | * that snap can be settled upon.) i_wrbuffer_ref_head is reset to 0. | |
49 | * | |
50 | * On writeback, we must submit writes to the osd IN SNAP ORDER. So, | |
51 | * we look for the first capsnap in i_cap_snaps and write out pages in | |
52 | * that snap context _only_. Then we move on to the next capsnap, | |
53 | * eventually reaching the "live" or "head" context (i.e., pages that | |
54 | * are not yet snapped) and are writing the most recently dirtied | |
55 | * pages. | |
56 | * | |
57 | * Invalidate and so forth must take care to ensure the dirty page | |
58 | * accounting is preserved. | |
59 | */ | |
60 | ||
2baba250 YS |
61 | #define CONGESTION_ON_THRESH(congestion_kb) (congestion_kb >> (PAGE_SHIFT-10)) |
62 | #define CONGESTION_OFF_THRESH(congestion_kb) \ | |
63 | (CONGESTION_ON_THRESH(congestion_kb) - \ | |
64 | (CONGESTION_ON_THRESH(congestion_kb) >> 2)) | |
65 | ||
d801327d | 66 | static int ceph_netfs_check_write_begin(struct file *file, loff_t pos, unsigned int len, |
fac47b43 | 67 | struct folio **foliop, void **_fsdata); |
d801327d | 68 | |
61600ef8 YZ |
69 | static inline struct ceph_snap_context *page_snap_context(struct page *page) |
70 | { | |
71 | if (PagePrivate(page)) | |
72 | return (void *)page->private; | |
73 | return NULL; | |
74 | } | |
1d3576fd SW |
75 | |
76 | /* | |
77 | * Dirty a page. Optimistically adjust accounting, on the assumption | |
78 | * that we won't race with invalidate. If we do, readjust. | |
79 | */ | |
8fb72b4a | 80 | static bool ceph_dirty_folio(struct address_space *mapping, struct folio *folio) |
1d3576fd | 81 | { |
38d46409 XL |
82 | struct inode *inode = mapping->host; |
83 | struct ceph_client *cl = ceph_inode_to_client(inode); | |
1d3576fd | 84 | struct ceph_inode_info *ci; |
1d3576fd | 85 | struct ceph_snap_context *snapc; |
1d3576fd | 86 | |
8fb72b4a | 87 | if (folio_test_dirty(folio)) { |
38d46409 XL |
88 | doutc(cl, "%llx.%llx %p idx %lu -- already dirty\n", |
89 | ceph_vinop(inode), folio, folio->index); | |
642d51fb | 90 | VM_BUG_ON_FOLIO(!folio_test_private(folio), folio); |
8fb72b4a | 91 | return false; |
1d3576fd SW |
92 | } |
93 | ||
1d3576fd SW |
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 | 113 | ++ci->i_wrbuffer_ref; |
38d46409 XL |
114 | doutc(cl, "%llx.%llx %p idx %lu head %d/%d -> %d/%d " |
115 | "snapc %p seq %lld (%d snaps)\n", | |
116 | ceph_vinop(inode), folio, folio->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 | 122 | /* |
8fb72b4a | 123 | * Reference snap context in folio->private. Also set |
9872f4de | 124 | * PagePrivate so that we get invalidate_folio callback. |
7d6e1f54 | 125 | */ |
020bc44a | 126 | VM_WARN_ON_FOLIO(folio->private, folio); |
8fb72b4a | 127 | folio_attach_private(folio, snapc); |
1d3576fd | 128 | |
8fb72b4a | 129 | return ceph_fscache_dirty_folio(mapping, folio); |
1d3576fd SW |
130 | } |
131 | ||
132 | /* | |
9872f4de MWO |
133 | * If we are truncating the full folio (i.e. offset == 0), adjust the |
134 | * dirty folio counters appropriately. Only called if there is private | |
135 | * data on the folio. | |
1d3576fd | 136 | */ |
9872f4de MWO |
137 | static void ceph_invalidate_folio(struct folio *folio, size_t offset, |
138 | size_t length) | |
1d3576fd | 139 | { |
38d46409 XL |
140 | struct inode *inode = folio->mapping->host; |
141 | struct ceph_client *cl = ceph_inode_to_client(inode); | |
142 | struct ceph_inode_info *ci = ceph_inode(inode); | |
379fc7fa | 143 | struct ceph_snap_context *snapc; |
1d3576fd | 144 | |
b150f5c1 | 145 | |
9872f4de | 146 | if (offset != 0 || length != folio_size(folio)) { |
38d46409 XL |
147 | doutc(cl, "%llx.%llx idx %lu partial dirty page %zu~%zu\n", |
148 | ceph_vinop(inode), folio->index, offset, length); | |
b150f5c1 MT |
149 | return; |
150 | } | |
4ce1e9ad | 151 | |
9872f4de | 152 | WARN_ON(!folio_test_locked(folio)); |
642d51fb | 153 | if (folio_test_private(folio)) { |
38d46409 XL |
154 | doutc(cl, "%llx.%llx idx %lu full dirty page\n", |
155 | ceph_vinop(inode), folio->index); | |
99ccbd22 | 156 | |
9872f4de | 157 | snapc = folio_detach_private(folio); |
400e1286 JL |
158 | ceph_put_wrbuffer_cap_refs(ci, 1, snapc); |
159 | ceph_put_snap_context(snapc); | |
160 | } | |
b150f5c1 | 161 | |
c1ec4d7c | 162 | netfs_invalidate_folio(folio, offset, length); |
1d3576fd SW |
163 | } |
164 | ||
6a19114b | 165 | static void ceph_netfs_expand_readahead(struct netfs_io_request *rreq) |
f0702876 | 166 | { |
a25cedb4 | 167 | struct inode *inode = rreq->inode; |
f0702876 JL |
168 | struct ceph_inode_info *ci = ceph_inode(inode); |
169 | struct ceph_file_layout *lo = &ci->i_layout; | |
dc94bb8f XL |
170 | unsigned long max_pages = inode->i_sb->s_bdi->ra_pages; |
171 | loff_t end = rreq->start + rreq->len, new_end; | |
172 | struct ceph_netfs_request_data *priv = rreq->netfs_priv; | |
173 | unsigned long max_len; | |
f0702876 | 174 | u32 blockoff; |
f0702876 | 175 | |
dc94bb8f XL |
176 | if (priv) { |
177 | /* Readahead is disabled by posix_fadvise POSIX_FADV_RANDOM */ | |
178 | if (priv->file_ra_disabled) | |
179 | max_pages = 0; | |
180 | else | |
181 | max_pages = priv->file_ra_pages; | |
f0702876 | 182 | |
dc94bb8f XL |
183 | } |
184 | ||
185 | /* Readahead is disabled */ | |
186 | if (!max_pages) | |
187 | return; | |
188 | ||
189 | max_len = max_pages << PAGE_SHIFT; | |
190 | ||
191 | /* | |
192 | * Try to expand the length forward by rounding up it to the next | |
193 | * block, but do not exceed the file size, unless the original | |
194 | * request already exceeds it. | |
195 | */ | |
7ba167c4 | 196 | new_end = umin(round_up(end, lo->stripe_unit), rreq->i_size); |
dc94bb8f XL |
197 | if (new_end > end && new_end <= rreq->start + max_len) |
198 | rreq->len = new_end - rreq->start; | |
199 | ||
200 | /* Try to expand the start downward */ | |
201 | div_u64_rem(rreq->start, lo->stripe_unit, &blockoff); | |
202 | if (rreq->len + blockoff <= max_len) { | |
203 | rreq->start -= blockoff; | |
204 | rreq->len += blockoff; | |
205 | } | |
f0702876 JL |
206 | } |
207 | ||
6a19114b | 208 | static bool ceph_netfs_clamp_length(struct netfs_io_subrequest *subreq) |
f0702876 | 209 | { |
a25cedb4 | 210 | struct inode *inode = subreq->rreq->inode; |
5995d90d | 211 | struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); |
f0702876 JL |
212 | struct ceph_inode_info *ci = ceph_inode(inode); |
213 | u64 objno, objoff; | |
214 | u32 xlen; | |
215 | ||
216 | /* Truncate the extent at the end of the current block */ | |
217 | ceph_calc_file_object_mapping(&ci->i_layout, subreq->start, subreq->len, | |
218 | &objno, &objoff, &xlen); | |
219 | subreq->len = min(xlen, fsc->mount_options->rsize); | |
220 | return true; | |
221 | } | |
222 | ||
223 | static void finish_netfs_read(struct ceph_osd_request *req) | |
224 | { | |
f0fe1e54 | 225 | struct inode *inode = req->r_inode; |
5995d90d | 226 | struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); |
38d46409 | 227 | struct ceph_client *cl = fsc->client; |
f0702876 | 228 | struct ceph_osd_data *osd_data = osd_req_op_extent_osd_data(req, 0); |
6a19114b | 229 | struct netfs_io_subrequest *subreq = req->r_priv; |
03bc06c7 | 230 | struct ceph_osd_req_op *op = &req->r_ops[0]; |
f0702876 | 231 | int err = req->r_result; |
03bc06c7 | 232 | bool sparse = (op->op == CEPH_OSD_OP_SPARSE_READ); |
f0702876 | 233 | |
8ae99ae2 | 234 | ceph_update_read_metrics(&fsc->mdsc->metric, req->r_start_latency, |
903f4fec | 235 | req->r_end_latency, osd_data->length, err); |
f0702876 | 236 | |
38d46409 XL |
237 | doutc(cl, "result %d subreq->len=%zu i_size=%lld\n", req->r_result, |
238 | subreq->len, i_size_read(req->r_inode)); | |
f0702876 JL |
239 | |
240 | /* no object means success but no data */ | |
f0fe1e54 | 241 | if (err == -ENOENT) |
f0702876 JL |
242 | err = 0; |
243 | else if (err == -EBLOCKLISTED) | |
244 | fsc->blocklisted = true; | |
245 | ||
f0fe1e54 JL |
246 | if (err >= 0) { |
247 | if (sparse && err > 0) | |
248 | err = ceph_sparse_ext_map_end(op); | |
249 | if (err < subreq->len) | |
250 | __set_bit(NETFS_SREQ_CLEAR_TAIL, &subreq->flags); | |
251 | if (IS_ENCRYPTED(inode) && err > 0) { | |
252 | err = ceph_fscrypt_decrypt_extents(inode, | |
253 | osd_data->pages, subreq->start, | |
254 | op->extent.sparse_ext, | |
255 | op->extent.sparse_ext_cnt); | |
256 | if (err > subreq->len) | |
257 | err = subreq->len; | |
258 | } | |
259 | } | |
f0702876 | 260 | |
f0fe1e54 JL |
261 | if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { |
262 | ceph_put_page_vector(osd_data->pages, | |
263 | calc_pages_for(osd_data->alignment, | |
264 | osd_data->length), false); | |
265 | } | |
7467b044 | 266 | netfs_subreq_terminated(subreq, err, false); |
f0702876 | 267 | iput(req->r_inode); |
1464de9f | 268 | ceph_dec_osd_stopping_blocker(fsc->mdsc); |
f0702876 JL |
269 | } |
270 | ||
6a19114b | 271 | static bool ceph_netfs_issue_op_inline(struct netfs_io_subrequest *subreq) |
5b19f1eb | 272 | { |
6a19114b | 273 | struct netfs_io_request *rreq = subreq->rreq; |
5b19f1eb DH |
274 | struct inode *inode = rreq->inode; |
275 | struct ceph_mds_reply_info_parsed *rinfo; | |
276 | struct ceph_mds_reply_info_in *iinfo; | |
277 | struct ceph_mds_request *req; | |
278 | struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); | |
279 | struct ceph_inode_info *ci = ceph_inode(inode); | |
280 | struct iov_iter iter; | |
281 | ssize_t err = 0; | |
282 | size_t len; | |
5eed80fb | 283 | int mode; |
5b19f1eb DH |
284 | |
285 | __set_bit(NETFS_SREQ_CLEAR_TAIL, &subreq->flags); | |
f18a3785 | 286 | __clear_bit(NETFS_SREQ_COPY_TO_CACHE, &subreq->flags); |
5b19f1eb DH |
287 | |
288 | if (subreq->start >= inode->i_size) | |
289 | goto out; | |
290 | ||
291 | /* We need to fetch the inline data. */ | |
5eed80fb XL |
292 | mode = ceph_try_to_choose_auth_mds(inode, CEPH_STAT_CAP_INLINE_DATA); |
293 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, mode); | |
5b19f1eb DH |
294 | if (IS_ERR(req)) { |
295 | err = PTR_ERR(req); | |
296 | goto out; | |
297 | } | |
298 | req->r_ino1 = ci->i_vino; | |
299 | req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INLINE_DATA); | |
300 | req->r_num_caps = 2; | |
301 | ||
302 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
303 | if (err < 0) | |
304 | goto out; | |
305 | ||
306 | rinfo = &req->r_reply_info; | |
307 | iinfo = &rinfo->targeti; | |
308 | if (iinfo->inline_version == CEPH_INLINE_NONE) { | |
309 | /* The data got uninlined */ | |
310 | ceph_mdsc_put_request(req); | |
311 | return false; | |
312 | } | |
313 | ||
314 | len = min_t(size_t, iinfo->inline_len - subreq->start, subreq->len); | |
de4eda9d | 315 | iov_iter_xarray(&iter, ITER_DEST, &rreq->mapping->i_pages, subreq->start, len); |
5b19f1eb DH |
316 | err = copy_to_iter(iinfo->inline_data + subreq->start, len, &iter); |
317 | if (err == 0) | |
318 | err = -EFAULT; | |
319 | ||
320 | ceph_mdsc_put_request(req); | |
321 | out: | |
322 | netfs_subreq_terminated(subreq, err, false); | |
323 | return true; | |
324 | } | |
325 | ||
f18a3785 | 326 | static void ceph_netfs_issue_read(struct netfs_io_subrequest *subreq) |
f0702876 | 327 | { |
6a19114b | 328 | struct netfs_io_request *rreq = subreq->rreq; |
a25cedb4 | 329 | struct inode *inode = rreq->inode; |
f0702876 | 330 | struct ceph_inode_info *ci = ceph_inode(inode); |
5995d90d | 331 | struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); |
38d46409 | 332 | struct ceph_client *cl = fsc->client; |
a68e564a | 333 | struct ceph_osd_request *req = NULL; |
f0702876 JL |
334 | struct ceph_vino vino = ceph_vino(inode); |
335 | struct iov_iter iter; | |
f0702876 JL |
336 | int err = 0; |
337 | u64 len = subreq->len; | |
f0fe1e54 JL |
338 | bool sparse = IS_ENCRYPTED(inode) || ceph_test_mount_opt(fsc, SPARSEREAD); |
339 | u64 off = subreq->start; | |
aaefabc4 | 340 | int extent_cnt; |
f0702876 | 341 | |
a68e564a XL |
342 | if (ceph_inode_is_shutdown(inode)) { |
343 | err = -EIO; | |
344 | goto out; | |
345 | } | |
346 | ||
48490776 | 347 | if (ceph_has_inline_data(ci) && ceph_netfs_issue_op_inline(subreq)) |
5b19f1eb DH |
348 | return; |
349 | ||
f0fe1e54 JL |
350 | ceph_fscrypt_adjust_off_and_len(inode, &off, &len); |
351 | ||
352 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, vino, | |
353 | off, &len, 0, 1, sparse ? CEPH_OSD_OP_SPARSE_READ : CEPH_OSD_OP_READ, | |
b36b0334 XL |
354 | CEPH_OSD_FLAG_READ, NULL, ci->i_truncate_seq, |
355 | ci->i_truncate_size, false); | |
f0702876 JL |
356 | if (IS_ERR(req)) { |
357 | err = PTR_ERR(req); | |
358 | req = NULL; | |
359 | goto out; | |
360 | } | |
361 | ||
03bc06c7 | 362 | if (sparse) { |
aaefabc4 XL |
363 | extent_cnt = __ceph_sparse_read_ext_count(inode, len); |
364 | err = ceph_alloc_sparse_ext_map(&req->r_ops[0], extent_cnt); | |
03bc06c7 JL |
365 | if (err) |
366 | goto out; | |
367 | } | |
368 | ||
38d46409 XL |
369 | doutc(cl, "%llx.%llx pos=%llu orig_len=%zu len=%llu\n", |
370 | ceph_vinop(inode), subreq->start, subreq->len, len); | |
f0fe1e54 | 371 | |
de4eda9d | 372 | iov_iter_xarray(&iter, ITER_DEST, &rreq->mapping->i_pages, subreq->start, len); |
f0fe1e54 JL |
373 | |
374 | /* | |
375 | * FIXME: For now, use CEPH_OSD_DATA_TYPE_PAGES instead of _ITER for | |
376 | * encrypted inodes. We'd need infrastructure that handles an iov_iter | |
377 | * instead of page arrays, and we don't have that as of yet. Once the | |
378 | * dust settles on the write helpers and encrypt/decrypt routines for | |
379 | * netfs, we should be able to rework this. | |
380 | */ | |
381 | if (IS_ENCRYPTED(inode)) { | |
382 | struct page **pages; | |
383 | size_t page_off; | |
384 | ||
385 | err = iov_iter_get_pages_alloc2(&iter, &pages, len, &page_off); | |
386 | if (err < 0) { | |
38d46409 XL |
387 | doutc(cl, "%llx.%llx failed to allocate pages, %d\n", |
388 | ceph_vinop(inode), err); | |
f0fe1e54 JL |
389 | goto out; |
390 | } | |
391 | ||
392 | /* should always give us a page-aligned read */ | |
393 | WARN_ON_ONCE(page_off); | |
394 | len = err; | |
395 | err = 0; | |
396 | ||
397 | osd_req_op_extent_osd_data_pages(req, 0, pages, len, 0, false, | |
398 | false); | |
399 | } else { | |
400 | osd_req_op_extent_osd_iter(req, 0, &iter); | |
401 | } | |
1464de9f XL |
402 | if (!ceph_inc_osd_stopping_blocker(fsc->mdsc)) { |
403 | err = -EIO; | |
404 | goto out; | |
405 | } | |
f0702876 JL |
406 | req->r_callback = finish_netfs_read; |
407 | req->r_priv = subreq; | |
408 | req->r_inode = inode; | |
409 | ihold(inode); | |
410 | ||
a8af0d68 | 411 | ceph_osdc_start_request(req->r_osdc, req); |
f0702876 JL |
412 | out: |
413 | ceph_osdc_put_request(req); | |
414 | if (err) | |
415 | netfs_subreq_terminated(subreq, err, false); | |
38d46409 | 416 | doutc(cl, "%llx.%llx result %d\n", ceph_vinop(inode), err); |
f0702876 JL |
417 | } |
418 | ||
a5c9dc44 DH |
419 | static int ceph_init_request(struct netfs_io_request *rreq, struct file *file) |
420 | { | |
421 | struct inode *inode = rreq->inode; | |
38d46409 | 422 | struct ceph_client *cl = ceph_inode_to_client(inode); |
a5c9dc44 | 423 | int got = 0, want = CEPH_CAP_FILE_CACHE; |
23ee27dc | 424 | struct ceph_netfs_request_data *priv; |
a5c9dc44 DH |
425 | int ret = 0; |
426 | ||
427 | if (rreq->origin != NETFS_READAHEAD) | |
428 | return 0; | |
429 | ||
23ee27dc XL |
430 | priv = kzalloc(sizeof(*priv), GFP_NOFS); |
431 | if (!priv) | |
432 | return -ENOMEM; | |
433 | ||
a5c9dc44 DH |
434 | if (file) { |
435 | struct ceph_rw_context *rw_ctx; | |
436 | struct ceph_file_info *fi = file->private_data; | |
437 | ||
23ee27dc XL |
438 | priv->file_ra_pages = file->f_ra.ra_pages; |
439 | priv->file_ra_disabled = file->f_mode & FMODE_RANDOM; | |
440 | ||
a5c9dc44 | 441 | rw_ctx = ceph_find_rw_context(fi); |
23ee27dc XL |
442 | if (rw_ctx) { |
443 | rreq->netfs_priv = priv; | |
a5c9dc44 | 444 | return 0; |
23ee27dc | 445 | } |
a5c9dc44 DH |
446 | } |
447 | ||
448 | /* | |
449 | * readahead callers do not necessarily hold Fcb caps | |
450 | * (e.g. fadvise, madvise). | |
451 | */ | |
452 | ret = ceph_try_get_caps(inode, CEPH_CAP_FILE_RD, want, true, &got); | |
453 | if (ret < 0) { | |
38d46409 | 454 | doutc(cl, "%llx.%llx, error getting cap\n", ceph_vinop(inode)); |
23ee27dc | 455 | goto out; |
a5c9dc44 DH |
456 | } |
457 | ||
458 | if (!(got & want)) { | |
38d46409 | 459 | doutc(cl, "%llx.%llx, no cache cap\n", ceph_vinop(inode)); |
23ee27dc XL |
460 | ret = -EACCES; |
461 | goto out; | |
462 | } | |
463 | if (ret == 0) { | |
464 | ret = -EACCES; | |
465 | goto out; | |
a5c9dc44 | 466 | } |
a5c9dc44 | 467 | |
23ee27dc XL |
468 | priv->caps = got; |
469 | rreq->netfs_priv = priv; | |
470 | ||
471 | out: | |
472 | if (ret < 0) | |
473 | kfree(priv); | |
474 | ||
475 | return ret; | |
a5c9dc44 DH |
476 | } |
477 | ||
40a81101 | 478 | static void ceph_netfs_free_request(struct netfs_io_request *rreq) |
49870056 | 479 | { |
23ee27dc XL |
480 | struct ceph_netfs_request_data *priv = rreq->netfs_priv; |
481 | ||
482 | if (!priv) | |
483 | return; | |
49870056 | 484 | |
23ee27dc XL |
485 | if (priv->caps) |
486 | ceph_put_cap_refs(ceph_inode(rreq->inode), priv->caps); | |
487 | kfree(priv); | |
488 | rreq->netfs_priv = NULL; | |
49870056 JL |
489 | } |
490 | ||
bc899ee1 | 491 | const struct netfs_request_ops ceph_netfs_ops = { |
a5c9dc44 | 492 | .init_request = ceph_init_request, |
40a81101 | 493 | .free_request = ceph_netfs_free_request, |
f18a3785 | 494 | .issue_read = ceph_netfs_issue_read, |
f0702876 JL |
495 | .expand_readahead = ceph_netfs_expand_readahead, |
496 | .clamp_length = ceph_netfs_clamp_length, | |
d801327d | 497 | .check_write_begin = ceph_netfs_check_write_begin, |
f0702876 JL |
498 | }; |
499 | ||
1702e797 | 500 | #ifdef CONFIG_CEPH_FSCACHE |
1702e797 JL |
501 | static void ceph_fscache_write_terminated(void *priv, ssize_t error, bool was_async) |
502 | { | |
503 | struct inode *inode = priv; | |
504 | ||
505 | if (IS_ERR_VALUE(error) && error != -ENOBUFS) | |
506 | ceph_fscache_invalidate(inode, false); | |
507 | } | |
508 | ||
509 | static void ceph_fscache_write_to_cache(struct inode *inode, u64 off, u64 len, bool caching) | |
510 | { | |
511 | struct ceph_inode_info *ci = ceph_inode(inode); | |
512 | struct fscache_cookie *cookie = ceph_fscache_cookie(ci); | |
513 | ||
514 | fscache_write_to_cache(cookie, inode->i_mapping, off, len, i_size_read(inode), | |
2ff1e975 | 515 | ceph_fscache_write_terminated, inode, true, caching); |
1702e797 JL |
516 | } |
517 | #else | |
1702e797 JL |
518 | static inline void ceph_fscache_write_to_cache(struct inode *inode, u64 off, u64 len, bool caching) |
519 | { | |
520 | } | |
521 | #endif /* CONFIG_CEPH_FSCACHE */ | |
522 | ||
1f934b00 YZ |
523 | struct ceph_writeback_ctl |
524 | { | |
525 | loff_t i_size; | |
526 | u64 truncate_size; | |
527 | u32 truncate_seq; | |
528 | bool size_stable; | |
2a2d927e | 529 | bool head_snapc; |
1f934b00 YZ |
530 | }; |
531 | ||
1d3576fd SW |
532 | /* |
533 | * Get ref for the oldest snapc for an inode with dirty data... that is, the | |
534 | * only snap context we are allowed to write back. | |
1d3576fd | 535 | */ |
1f934b00 | 536 | static struct ceph_snap_context * |
05455e11 YZ |
537 | get_oldest_context(struct inode *inode, struct ceph_writeback_ctl *ctl, |
538 | struct ceph_snap_context *page_snapc) | |
1d3576fd SW |
539 | { |
540 | struct ceph_inode_info *ci = ceph_inode(inode); | |
38d46409 | 541 | struct ceph_client *cl = ceph_inode_to_client(inode); |
1d3576fd SW |
542 | struct ceph_snap_context *snapc = NULL; |
543 | struct ceph_cap_snap *capsnap = NULL; | |
544 | ||
be655596 | 545 | spin_lock(&ci->i_ceph_lock); |
1d3576fd | 546 | list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) { |
38d46409 XL |
547 | doutc(cl, " capsnap %p snapc %p has %d dirty pages\n", |
548 | capsnap, capsnap->context, capsnap->dirty_pages); | |
05455e11 YZ |
549 | if (!capsnap->dirty_pages) |
550 | continue; | |
551 | ||
552 | /* get i_size, truncate_{seq,size} for page_snapc? */ | |
553 | if (snapc && capsnap->context != page_snapc) | |
554 | continue; | |
555 | ||
556 | if (ctl) { | |
557 | if (capsnap->writing) { | |
558 | ctl->i_size = i_size_read(inode); | |
559 | ctl->size_stable = false; | |
560 | } else { | |
561 | ctl->i_size = capsnap->size; | |
562 | ctl->size_stable = true; | |
1f934b00 | 563 | } |
05455e11 YZ |
564 | ctl->truncate_size = capsnap->truncate_size; |
565 | ctl->truncate_seq = capsnap->truncate_seq; | |
2a2d927e | 566 | ctl->head_snapc = false; |
1d3576fd | 567 | } |
05455e11 YZ |
568 | |
569 | if (snapc) | |
570 | break; | |
571 | ||
572 | snapc = ceph_get_snap_context(capsnap->context); | |
573 | if (!page_snapc || | |
574 | page_snapc == snapc || | |
575 | page_snapc->seq > snapc->seq) | |
576 | break; | |
1d3576fd | 577 | } |
7d8cb26d | 578 | if (!snapc && ci->i_wrbuffer_ref_head) { |
80e755fe | 579 | snapc = ceph_get_snap_context(ci->i_head_snapc); |
38d46409 XL |
580 | doutc(cl, " head snapc %p has %d dirty pages\n", snapc, |
581 | ci->i_wrbuffer_ref_head); | |
1f934b00 YZ |
582 | if (ctl) { |
583 | ctl->i_size = i_size_read(inode); | |
584 | ctl->truncate_size = ci->i_truncate_size; | |
585 | ctl->truncate_seq = ci->i_truncate_seq; | |
586 | ctl->size_stable = false; | |
2a2d927e | 587 | ctl->head_snapc = true; |
1f934b00 | 588 | } |
1d3576fd | 589 | } |
be655596 | 590 | spin_unlock(&ci->i_ceph_lock); |
1d3576fd SW |
591 | return snapc; |
592 | } | |
593 | ||
1f934b00 YZ |
594 | static u64 get_writepages_data_length(struct inode *inode, |
595 | struct page *page, u64 start) | |
596 | { | |
597 | struct ceph_inode_info *ci = ceph_inode(inode); | |
d5520771 | 598 | struct ceph_snap_context *snapc; |
1f934b00 YZ |
599 | struct ceph_cap_snap *capsnap = NULL; |
600 | u64 end = i_size_read(inode); | |
d5520771 | 601 | u64 ret; |
1f934b00 | 602 | |
d5520771 | 603 | snapc = page_snap_context(ceph_fscrypt_pagecache_page(page)); |
1f934b00 YZ |
604 | if (snapc != ci->i_head_snapc) { |
605 | bool found = false; | |
606 | spin_lock(&ci->i_ceph_lock); | |
607 | list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) { | |
608 | if (capsnap->context == snapc) { | |
609 | if (!capsnap->writing) | |
610 | end = capsnap->size; | |
611 | found = true; | |
612 | break; | |
613 | } | |
614 | } | |
615 | spin_unlock(&ci->i_ceph_lock); | |
616 | WARN_ON(!found); | |
617 | } | |
d5520771 JL |
618 | if (end > ceph_fscrypt_page_offset(page) + thp_size(page)) |
619 | end = ceph_fscrypt_page_offset(page) + thp_size(page); | |
620 | ret = end > start ? end - start : 0; | |
621 | if (ret && fscrypt_is_bounce_page(page)) | |
622 | ret = round_up(ret, CEPH_FSCRYPT_BLOCK_SIZE); | |
623 | return ret; | |
1f934b00 YZ |
624 | } |
625 | ||
1d3576fd SW |
626 | /* |
627 | * Write a single page, but leave the page locked. | |
628 | * | |
b72b13eb | 629 | * If we get a write error, mark the mapping for error, but still adjust the |
1d3576fd SW |
630 | * dirty page accounting (i.e., page is no longer dirty). |
631 | */ | |
632 | static int writepage_nounlock(struct page *page, struct writeback_control *wbc) | |
633 | { | |
a628304e | 634 | struct folio *folio = page_folio(page); |
6390987f JL |
635 | struct inode *inode = page->mapping->host; |
636 | struct ceph_inode_info *ci = ceph_inode(inode); | |
5995d90d | 637 | struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); |
38d46409 | 638 | struct ceph_client *cl = fsc->client; |
6298a337 | 639 | struct ceph_snap_context *snapc, *oldest; |
fc2744aa | 640 | loff_t page_off = page_offset(page); |
6390987f | 641 | int err; |
8ff2d290 | 642 | loff_t len = thp_size(page); |
d5520771 | 643 | loff_t wlen; |
1f934b00 | 644 | struct ceph_writeback_ctl ceph_wbc; |
6390987f JL |
645 | struct ceph_osd_client *osdc = &fsc->client->osdc; |
646 | struct ceph_osd_request *req; | |
1702e797 | 647 | bool caching = ceph_is_cache_enabled(inode); |
d5520771 | 648 | struct page *bounce_page = NULL; |
1d3576fd | 649 | |
38d46409 XL |
650 | doutc(cl, "%llx.%llx page %p idx %lu\n", ceph_vinop(inode), page, |
651 | page->index); | |
1d3576fd | 652 | |
a68e564a XL |
653 | if (ceph_inode_is_shutdown(inode)) |
654 | return -EIO; | |
655 | ||
1d3576fd | 656 | /* verify this is a writeable snap context */ |
61600ef8 | 657 | snapc = page_snap_context(page); |
d37b1d99 | 658 | if (!snapc) { |
38d46409 XL |
659 | doutc(cl, "%llx.%llx page %p not dirty?\n", ceph_vinop(inode), |
660 | page); | |
43986881 | 661 | return 0; |
1d3576fd | 662 | } |
05455e11 | 663 | oldest = get_oldest_context(inode, &ceph_wbc, snapc); |
6298a337 | 664 | if (snapc->seq > oldest->seq) { |
38d46409 XL |
665 | doutc(cl, "%llx.%llx page %p snapc %p not writeable - noop\n", |
666 | ceph_vinop(inode), page, snapc); | |
1d3576fd | 667 | /* we should only noop if called by kswapd */ |
fa71fefb | 668 | WARN_ON(!(current->flags & PF_MEMALLOC)); |
6298a337 | 669 | ceph_put_snap_context(oldest); |
fa71fefb | 670 | redirty_page_for_writepage(wbc, page); |
43986881 | 671 | return 0; |
1d3576fd | 672 | } |
6298a337 | 673 | ceph_put_snap_context(oldest); |
1d3576fd SW |
674 | |
675 | /* is this a partial page at end of file? */ | |
1f934b00 | 676 | if (page_off >= ceph_wbc.i_size) { |
38d46409 XL |
677 | doutc(cl, "%llx.%llx folio at %lu beyond eof %llu\n", |
678 | ceph_vinop(inode), folio->index, ceph_wbc.i_size); | |
a628304e | 679 | folio_invalidate(folio, 0, folio_size(folio)); |
43986881 | 680 | return 0; |
fc2744aa | 681 | } |
43986881 | 682 | |
1f934b00 YZ |
683 | if (ceph_wbc.i_size < page_off + len) |
684 | len = ceph_wbc.i_size - page_off; | |
1d3576fd | 685 | |
d5520771 | 686 | wlen = IS_ENCRYPTED(inode) ? round_up(len, CEPH_FSCRYPT_BLOCK_SIZE) : len; |
38d46409 XL |
687 | doutc(cl, "%llx.%llx page %p index %lu on %llu~%llu snapc %p seq %lld\n", |
688 | ceph_vinop(inode), page, page->index, page_off, wlen, snapc, | |
689 | snapc->seq); | |
1d3576fd | 690 | |
314c4737 | 691 | if (atomic_long_inc_return(&fsc->writeback_count) > |
3d14c5d2 | 692 | CONGESTION_ON_THRESH(fsc->mount_options->congestion_kb)) |
503d4fa6 | 693 | fsc->write_congested = true; |
2baba250 | 694 | |
d5520771 JL |
695 | req = ceph_osdc_new_request(osdc, &ci->i_layout, ceph_vino(inode), |
696 | page_off, &wlen, 0, 1, CEPH_OSD_OP_WRITE, | |
697 | CEPH_OSD_FLAG_WRITE, snapc, | |
698 | ceph_wbc.truncate_seq, | |
699 | ceph_wbc.truncate_size, true); | |
3459bd0c XL |
700 | if (IS_ERR(req)) { |
701 | redirty_page_for_writepage(wbc, page); | |
6390987f | 702 | return PTR_ERR(req); |
3459bd0c | 703 | } |
1702e797 | 704 | |
d5520771 JL |
705 | if (wlen < len) |
706 | len = wlen; | |
707 | ||
1702e797 | 708 | set_page_writeback(page); |
1702e797 | 709 | ceph_fscache_write_to_cache(inode, page_off, len, caching); |
6390987f | 710 | |
d5520771 JL |
711 | if (IS_ENCRYPTED(inode)) { |
712 | bounce_page = fscrypt_encrypt_pagecache_blocks(page, | |
713 | CEPH_FSCRYPT_BLOCK_SIZE, 0, | |
714 | GFP_NOFS); | |
715 | if (IS_ERR(bounce_page)) { | |
716 | redirty_page_for_writepage(wbc, page); | |
717 | end_page_writeback(page); | |
718 | ceph_osdc_put_request(req); | |
719 | return PTR_ERR(bounce_page); | |
720 | } | |
721 | } | |
722 | ||
6390987f | 723 | /* it may be a short write due to an object boundary */ |
8ff2d290 | 724 | WARN_ON_ONCE(len > thp_size(page)); |
d5520771 JL |
725 | osd_req_op_extent_osd_data_pages(req, 0, |
726 | bounce_page ? &bounce_page : &page, wlen, 0, | |
727 | false, false); | |
38d46409 XL |
728 | doutc(cl, "%llx.%llx %llu~%llu (%llu bytes, %sencrypted)\n", |
729 | ceph_vinop(inode), page_off, len, wlen, | |
730 | IS_ENCRYPTED(inode) ? "" : "not "); | |
6390987f | 731 | |
c453bdb5 | 732 | req->r_mtime = inode_get_mtime(inode); |
a8af0d68 JL |
733 | ceph_osdc_start_request(osdc, req); |
734 | err = ceph_osdc_wait_request(osdc, req); | |
6390987f | 735 | |
8ae99ae2 | 736 | ceph_update_write_metrics(&fsc->mdsc->metric, req->r_start_latency, |
903f4fec | 737 | req->r_end_latency, len, err); |
d5520771 | 738 | fscrypt_free_bounce_page(bounce_page); |
6390987f JL |
739 | ceph_osdc_put_request(req); |
740 | if (err == 0) | |
741 | err = len; | |
742 | ||
1d3576fd | 743 | if (err < 0) { |
ad15ec06 YZ |
744 | struct writeback_control tmp_wbc; |
745 | if (!wbc) | |
746 | wbc = &tmp_wbc; | |
747 | if (err == -ERESTARTSYS) { | |
748 | /* killed by SIGKILL */ | |
38d46409 XL |
749 | doutc(cl, "%llx.%llx interrupted page %p\n", |
750 | ceph_vinop(inode), page); | |
ad15ec06 YZ |
751 | redirty_page_for_writepage(wbc, page); |
752 | end_page_writeback(page); | |
43986881 | 753 | return err; |
ad15ec06 | 754 | } |
0b98acd6 ID |
755 | if (err == -EBLOCKLISTED) |
756 | fsc->blocklisted = true; | |
38d46409 XL |
757 | doutc(cl, "%llx.%llx setting page/mapping error %d %p\n", |
758 | ceph_vinop(inode), err, page); | |
1d3576fd | 759 | mapping_set_error(&inode->i_data, err); |
ad15ec06 | 760 | wbc->pages_skipped++; |
1d3576fd | 761 | } else { |
38d46409 XL |
762 | doutc(cl, "%llx.%llx cleaned page %p\n", |
763 | ceph_vinop(inode), page); | |
1d3576fd SW |
764 | err = 0; /* vfs expects us to return 0 */ |
765 | } | |
379fc7fa JL |
766 | oldest = detach_page_private(page); |
767 | WARN_ON_ONCE(oldest != snapc); | |
1d3576fd SW |
768 | end_page_writeback(page); |
769 | ceph_put_wrbuffer_cap_refs(ci, 1, snapc); | |
6298a337 | 770 | ceph_put_snap_context(snapc); /* page's reference */ |
314c4737 YZ |
771 | |
772 | if (atomic_long_dec_return(&fsc->writeback_count) < | |
773 | CONGESTION_OFF_THRESH(fsc->mount_options->congestion_kb)) | |
503d4fa6 | 774 | fsc->write_congested = false; |
314c4737 | 775 | |
1d3576fd SW |
776 | return err; |
777 | } | |
778 | ||
779 | static int ceph_writepage(struct page *page, struct writeback_control *wbc) | |
780 | { | |
dbd646a8 YS |
781 | int err; |
782 | struct inode *inode = page->mapping->host; | |
783 | BUG_ON(!inode); | |
70b666c3 | 784 | ihold(inode); |
1702e797 | 785 | |
503d4fa6 | 786 | if (wbc->sync_mode == WB_SYNC_NONE && |
b372e96b N |
787 | ceph_inode_to_fs_client(inode)->write_congested) { |
788 | redirty_page_for_writepage(wbc, page); | |
503d4fa6 | 789 | return AOP_WRITEPAGE_ACTIVATE; |
b372e96b | 790 | } |
503d4fa6 | 791 | |
dbd646a8 | 792 | err = writepage_nounlock(page, wbc); |
ad15ec06 YZ |
793 | if (err == -ERESTARTSYS) { |
794 | /* direct memory reclaimer was killed by SIGKILL. return 0 | |
795 | * to prevent caller from setting mapping/page error */ | |
796 | err = 0; | |
797 | } | |
1d3576fd | 798 | unlock_page(page); |
dbd646a8 | 799 | iput(inode); |
1d3576fd SW |
800 | return err; |
801 | } | |
802 | ||
1d3576fd SW |
803 | /* |
804 | * async writeback completion handler. | |
805 | * | |
806 | * If we get an error, set the mapping error bit, but not the individual | |
807 | * page error bits. | |
808 | */ | |
85e084fe | 809 | static void writepages_finish(struct ceph_osd_request *req) |
1d3576fd SW |
810 | { |
811 | struct inode *inode = req->r_inode; | |
1d3576fd | 812 | struct ceph_inode_info *ci = ceph_inode(inode); |
38d46409 | 813 | struct ceph_client *cl = ceph_inode_to_client(inode); |
87060c10 | 814 | struct ceph_osd_data *osd_data; |
1d3576fd | 815 | struct page *page; |
5b64640c YZ |
816 | int num_pages, total_pages = 0; |
817 | int i, j; | |
818 | int rc = req->r_result; | |
1d3576fd SW |
819 | struct ceph_snap_context *snapc = req->r_snapc; |
820 | struct address_space *mapping = inode->i_mapping; | |
5995d90d | 821 | struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); |
903f4fec | 822 | unsigned int len = 0; |
5b64640c | 823 | bool remove_page; |
1d3576fd | 824 | |
38d46409 | 825 | doutc(cl, "%llx.%llx rc %d\n", ceph_vinop(inode), rc); |
26544c62 | 826 | if (rc < 0) { |
1d3576fd | 827 | mapping_set_error(mapping, rc); |
26544c62 | 828 | ceph_set_error_write(ci); |
0b98acd6 ID |
829 | if (rc == -EBLOCKLISTED) |
830 | fsc->blocklisted = true; | |
26544c62 JL |
831 | } else { |
832 | ceph_clear_error_write(ci); | |
833 | } | |
5b64640c YZ |
834 | |
835 | /* | |
836 | * We lost the cache cap, need to truncate the page before | |
837 | * it is unlocked, otherwise we'd truncate it later in the | |
838 | * page truncation thread, possibly losing some data that | |
839 | * raced its way in | |
840 | */ | |
841 | remove_page = !(ceph_caps_issued(ci) & | |
842 | (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)); | |
1d3576fd SW |
843 | |
844 | /* clean all pages */ | |
5b64640c | 845 | for (i = 0; i < req->r_num_ops; i++) { |
642d51fb | 846 | if (req->r_ops[i].op != CEPH_OSD_OP_WRITE) { |
38d46409 XL |
847 | pr_warn_client(cl, |
848 | "%llx.%llx incorrect op %d req %p index %d tid %llu\n", | |
849 | ceph_vinop(inode), req->r_ops[i].op, req, i, | |
850 | req->r_tid); | |
5b64640c | 851 | break; |
642d51fb | 852 | } |
e63dc5c7 | 853 | |
5b64640c YZ |
854 | osd_data = osd_req_op_extent_osd_data(req, i); |
855 | BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGES); | |
903f4fec | 856 | len += osd_data->length; |
5b64640c YZ |
857 | num_pages = calc_pages_for((u64)osd_data->alignment, |
858 | (u64)osd_data->length); | |
859 | total_pages += num_pages; | |
860 | for (j = 0; j < num_pages; j++) { | |
861 | page = osd_data->pages[j]; | |
d5520771 JL |
862 | if (fscrypt_is_bounce_page(page)) { |
863 | page = fscrypt_pagecache_page(page); | |
864 | fscrypt_free_bounce_page(osd_data->pages[j]); | |
865 | osd_data->pages[j] = page; | |
866 | } | |
5b64640c YZ |
867 | BUG_ON(!page); |
868 | WARN_ON(!PageUptodate(page)); | |
869 | ||
870 | if (atomic_long_dec_return(&fsc->writeback_count) < | |
871 | CONGESTION_OFF_THRESH( | |
872 | fsc->mount_options->congestion_kb)) | |
503d4fa6 | 873 | fsc->write_congested = false; |
5b64640c | 874 | |
379fc7fa | 875 | ceph_put_snap_context(detach_page_private(page)); |
5b64640c | 876 | end_page_writeback(page); |
38d46409 | 877 | doutc(cl, "unlocking %p\n", page); |
5b64640c YZ |
878 | |
879 | if (remove_page) | |
af7628d6 MWO |
880 | generic_error_remove_folio(inode->i_mapping, |
881 | page_folio(page)); | |
5b64640c YZ |
882 | |
883 | unlock_page(page); | |
884 | } | |
38d46409 XL |
885 | doutc(cl, "%llx.%llx wrote %llu bytes cleaned %d pages\n", |
886 | ceph_vinop(inode), osd_data->length, | |
887 | rc >= 0 ? num_pages : 0); | |
e63dc5c7 | 888 | |
96ac9158 | 889 | release_pages(osd_data->pages, num_pages); |
1d3576fd | 890 | } |
1d3576fd | 891 | |
903f4fec XL |
892 | ceph_update_write_metrics(&fsc->mdsc->metric, req->r_start_latency, |
893 | req->r_end_latency, len, rc); | |
894 | ||
5b64640c YZ |
895 | ceph_put_wrbuffer_cap_refs(ci, total_pages, snapc); |
896 | ||
897 | osd_data = osd_req_op_extent_osd_data(req, 0); | |
87060c10 | 898 | if (osd_data->pages_from_pool) |
a0102bda | 899 | mempool_free(osd_data->pages, ceph_wb_pagevec_pool); |
1d3576fd | 900 | else |
87060c10 | 901 | kfree(osd_data->pages); |
1d3576fd | 902 | ceph_osdc_put_request(req); |
1464de9f | 903 | ceph_dec_osd_stopping_blocker(fsc->mdsc); |
1d3576fd SW |
904 | } |
905 | ||
1d3576fd SW |
906 | /* |
907 | * initiate async writeback | |
908 | */ | |
909 | static int ceph_writepages_start(struct address_space *mapping, | |
910 | struct writeback_control *wbc) | |
911 | { | |
912 | struct inode *inode = mapping->host; | |
1d3576fd | 913 | struct ceph_inode_info *ci = ceph_inode(inode); |
5995d90d | 914 | struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); |
38d46409 | 915 | struct ceph_client *cl = fsc->client; |
fc2744aa | 916 | struct ceph_vino vino = ceph_vino(inode); |
2a2d927e | 917 | pgoff_t index, start_index, end = -1; |
80e755fe | 918 | struct ceph_snap_context *snapc = NULL, *last_snapc = NULL, *pgsnapc; |
590a2b5f | 919 | struct folio_batch fbatch; |
1d3576fd | 920 | int rc = 0; |
93407472 | 921 | unsigned int wsize = i_blocksize(inode); |
1d3576fd | 922 | struct ceph_osd_request *req = NULL; |
1f934b00 | 923 | struct ceph_writeback_ctl ceph_wbc; |
590e9d98 | 924 | bool should_loop, range_whole = false; |
af9cc401 | 925 | bool done = false; |
1702e797 | 926 | bool caching = ceph_is_cache_enabled(inode); |
7d41870d | 927 | xa_mark_t tag; |
1d3576fd | 928 | |
503d4fa6 N |
929 | if (wbc->sync_mode == WB_SYNC_NONE && |
930 | fsc->write_congested) | |
931 | return 0; | |
932 | ||
38d46409 XL |
933 | doutc(cl, "%llx.%llx (mode=%s)\n", ceph_vinop(inode), |
934 | wbc->sync_mode == WB_SYNC_NONE ? "NONE" : | |
935 | (wbc->sync_mode == WB_SYNC_ALL ? "ALL" : "HOLD")); | |
1d3576fd | 936 | |
5d6451b1 | 937 | if (ceph_inode_is_shutdown(inode)) { |
6c93df5d | 938 | if (ci->i_wrbuffer_ref > 0) { |
38d46409 XL |
939 | pr_warn_ratelimited_client(cl, |
940 | "%llx.%llx %lld forced umount\n", | |
941 | ceph_vinop(inode), ceph_ino(inode)); | |
6c93df5d | 942 | } |
a341d4df | 943 | mapping_set_error(mapping, -EIO); |
1d3576fd SW |
944 | return -EIO; /* we're in a forced umount, don't write! */ |
945 | } | |
95cca2b4 | 946 | if (fsc->mount_options->wsize < wsize) |
3d14c5d2 | 947 | wsize = fsc->mount_options->wsize; |
1d3576fd | 948 | |
590a2b5f | 949 | folio_batch_init(&fbatch); |
1d3576fd | 950 | |
590e9d98 | 951 | start_index = wbc->range_cyclic ? mapping->writeback_index : 0; |
2a2d927e | 952 | index = start_index; |
1d3576fd | 953 | |
7d41870d XL |
954 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) { |
955 | tag = PAGECACHE_TAG_TOWRITE; | |
956 | } else { | |
957 | tag = PAGECACHE_TAG_DIRTY; | |
958 | } | |
1d3576fd SW |
959 | retry: |
960 | /* find oldest snap context with dirty data */ | |
05455e11 | 961 | snapc = get_oldest_context(inode, &ceph_wbc, NULL); |
1d3576fd SW |
962 | if (!snapc) { |
963 | /* hmm, why does writepages get called when there | |
964 | is no dirty data? */ | |
38d46409 | 965 | doutc(cl, " no snap context with dirty data?\n"); |
1d3576fd SW |
966 | goto out; |
967 | } | |
38d46409 XL |
968 | doutc(cl, " oldest snapc is %p seq %lld (%d snaps)\n", snapc, |
969 | snapc->seq, snapc->num_snaps); | |
fc2744aa | 970 | |
2a2d927e YZ |
971 | should_loop = false; |
972 | if (ceph_wbc.head_snapc && snapc != last_snapc) { | |
973 | /* where to start/end? */ | |
974 | if (wbc->range_cyclic) { | |
975 | index = start_index; | |
976 | end = -1; | |
977 | if (index > 0) | |
978 | should_loop = true; | |
38d46409 | 979 | doutc(cl, " cyclic, start at %lu\n", index); |
2a2d927e YZ |
980 | } else { |
981 | index = wbc->range_start >> PAGE_SHIFT; | |
982 | end = wbc->range_end >> PAGE_SHIFT; | |
983 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) | |
984 | range_whole = true; | |
38d46409 | 985 | doutc(cl, " not cyclic, %lu to %lu\n", index, end); |
2a2d927e YZ |
986 | } |
987 | } else if (!ceph_wbc.head_snapc) { | |
988 | /* Do not respect wbc->range_{start,end}. Dirty pages | |
989 | * in that range can be associated with newer snapc. | |
990 | * They are not writeable until we write all dirty pages | |
991 | * associated with 'snapc' get written */ | |
1582af2e | 992 | if (index > 0) |
2a2d927e | 993 | should_loop = true; |
38d46409 | 994 | doutc(cl, " non-head snapc, range whole\n"); |
1d3576fd | 995 | } |
2a2d927e | 996 | |
7d41870d XL |
997 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) |
998 | tag_pages_for_writeback(mapping, index, end); | |
999 | ||
2a2d927e | 1000 | ceph_put_snap_context(last_snapc); |
1d3576fd SW |
1001 | last_snapc = snapc; |
1002 | ||
af9cc401 | 1003 | while (!done && index <= end) { |
5b64640c | 1004 | int num_ops = 0, op_idx; |
590a2b5f | 1005 | unsigned i, nr_folios, max_pages, locked_pages = 0; |
5b64640c | 1006 | struct page **pages = NULL, **data_pages; |
1d3576fd | 1007 | struct page *page; |
0e5ecac7 | 1008 | pgoff_t strip_unit_end = 0; |
5b64640c | 1009 | u64 offset = 0, len = 0; |
a0102bda | 1010 | bool from_pool = false; |
1d3576fd | 1011 | |
0e5ecac7 | 1012 | max_pages = wsize >> PAGE_SHIFT; |
1d3576fd SW |
1013 | |
1014 | get_more_pages: | |
590a2b5f | 1015 | nr_folios = filemap_get_folios_tag(mapping, &index, |
7d41870d | 1016 | end, tag, &fbatch); |
38d46409 | 1017 | doutc(cl, "pagevec_lookup_range_tag got %d\n", nr_folios); |
590a2b5f | 1018 | if (!nr_folios && !locked_pages) |
1d3576fd | 1019 | break; |
590a2b5f VMO |
1020 | for (i = 0; i < nr_folios && locked_pages < max_pages; i++) { |
1021 | page = &fbatch.folios[i]->page; | |
38d46409 | 1022 | doutc(cl, "? %p idx %lu\n", page, page->index); |
1d3576fd SW |
1023 | if (locked_pages == 0) |
1024 | lock_page(page); /* first page */ | |
1025 | else if (!trylock_page(page)) | |
1026 | break; | |
1027 | ||
1028 | /* only dirty pages, or our accounting breaks */ | |
1029 | if (unlikely(!PageDirty(page)) || | |
1030 | unlikely(page->mapping != mapping)) { | |
38d46409 | 1031 | doutc(cl, "!dirty or !mapping %p\n", page); |
1d3576fd | 1032 | unlock_page(page); |
0713e5f2 | 1033 | continue; |
1d3576fd | 1034 | } |
af9cc401 YZ |
1035 | /* only if matching snap context */ |
1036 | pgsnapc = page_snap_context(page); | |
1037 | if (pgsnapc != snapc) { | |
38d46409 XL |
1038 | doutc(cl, "page snapc %p %lld != oldest %p %lld\n", |
1039 | pgsnapc, pgsnapc->seq, snapc, snapc->seq); | |
1582af2e YZ |
1040 | if (!should_loop && |
1041 | !ceph_wbc.head_snapc && | |
1042 | wbc->sync_mode != WB_SYNC_NONE) | |
1043 | should_loop = true; | |
1d3576fd | 1044 | unlock_page(page); |
af9cc401 | 1045 | continue; |
1d3576fd | 1046 | } |
1f934b00 | 1047 | if (page_offset(page) >= ceph_wbc.i_size) { |
a628304e MWO |
1048 | struct folio *folio = page_folio(page); |
1049 | ||
38d46409 XL |
1050 | doutc(cl, "folio at %lu beyond eof %llu\n", |
1051 | folio->index, ceph_wbc.i_size); | |
c95f1c5f | 1052 | if ((ceph_wbc.size_stable || |
a628304e MWO |
1053 | folio_pos(folio) >= i_size_read(inode)) && |
1054 | folio_clear_dirty_for_io(folio)) | |
1055 | folio_invalidate(folio, 0, | |
1056 | folio_size(folio)); | |
1057 | folio_unlock(folio); | |
af9cc401 YZ |
1058 | continue; |
1059 | } | |
1060 | if (strip_unit_end && (page->index > strip_unit_end)) { | |
38d46409 | 1061 | doutc(cl, "end of strip unit %p\n", page); |
1d3576fd SW |
1062 | unlock_page(page); |
1063 | break; | |
1064 | } | |
ae678317 | 1065 | if (PageWriteback(page)) { |
0713e5f2 | 1066 | if (wbc->sync_mode == WB_SYNC_NONE) { |
38d46409 | 1067 | doutc(cl, "%p under writeback\n", page); |
0713e5f2 YZ |
1068 | unlock_page(page); |
1069 | continue; | |
1070 | } | |
38d46409 | 1071 | doutc(cl, "waiting on writeback %p\n", page); |
0713e5f2 | 1072 | wait_on_page_writeback(page); |
1d3576fd SW |
1073 | } |
1074 | ||
1d3576fd | 1075 | if (!clear_page_dirty_for_io(page)) { |
38d46409 | 1076 | doutc(cl, "%p !clear_page_dirty_for_io\n", page); |
1d3576fd | 1077 | unlock_page(page); |
0713e5f2 | 1078 | continue; |
1d3576fd SW |
1079 | } |
1080 | ||
e5975c7c AE |
1081 | /* |
1082 | * We have something to write. If this is | |
1083 | * the first locked page this time through, | |
5b64640c YZ |
1084 | * calculate max possinle write size and |
1085 | * allocate a page array | |
e5975c7c | 1086 | */ |
1d3576fd | 1087 | if (locked_pages == 0) { |
5b64640c YZ |
1088 | u64 objnum; |
1089 | u64 objoff; | |
dccbf080 | 1090 | u32 xlen; |
5b64640c | 1091 | |
1d3576fd | 1092 | /* prepare async write request */ |
e5975c7c | 1093 | offset = (u64)page_offset(page); |
dccbf080 ID |
1094 | ceph_calc_file_object_mapping(&ci->i_layout, |
1095 | offset, wsize, | |
1096 | &objnum, &objoff, | |
1097 | &xlen); | |
1098 | len = xlen; | |
8c71897b | 1099 | |
3fb99d48 | 1100 | num_ops = 1; |
5b64640c | 1101 | strip_unit_end = page->index + |
09cbfeaf | 1102 | ((len - 1) >> PAGE_SHIFT); |
88486957 | 1103 | |
5b64640c | 1104 | BUG_ON(pages); |
88486957 | 1105 | max_pages = calc_pages_for(0, (u64)len); |
6da2ec56 KC |
1106 | pages = kmalloc_array(max_pages, |
1107 | sizeof(*pages), | |
1108 | GFP_NOFS); | |
88486957 | 1109 | if (!pages) { |
a0102bda JL |
1110 | from_pool = true; |
1111 | pages = mempool_alloc(ceph_wb_pagevec_pool, GFP_NOFS); | |
e5975c7c | 1112 | BUG_ON(!pages); |
88486957 | 1113 | } |
5b64640c YZ |
1114 | |
1115 | len = 0; | |
1116 | } else if (page->index != | |
09cbfeaf | 1117 | (offset + len) >> PAGE_SHIFT) { |
a0102bda JL |
1118 | if (num_ops >= (from_pool ? CEPH_OSD_SLAB_OPS : |
1119 | CEPH_OSD_MAX_OPS)) { | |
5b64640c YZ |
1120 | redirty_page_for_writepage(wbc, page); |
1121 | unlock_page(page); | |
1122 | break; | |
1123 | } | |
1124 | ||
1125 | num_ops++; | |
1126 | offset = (u64)page_offset(page); | |
1127 | len = 0; | |
1d3576fd SW |
1128 | } |
1129 | ||
590a2b5f | 1130 | /* note position of first page in fbatch */ |
38d46409 XL |
1131 | doutc(cl, "%llx.%llx will write page %p idx %lu\n", |
1132 | ceph_vinop(inode), page, page->index); | |
2baba250 | 1133 | |
5b64640c YZ |
1134 | if (atomic_long_inc_return(&fsc->writeback_count) > |
1135 | CONGESTION_ON_THRESH( | |
503d4fa6 N |
1136 | fsc->mount_options->congestion_kb)) |
1137 | fsc->write_congested = true; | |
0713e5f2 | 1138 | |
d5520771 JL |
1139 | if (IS_ENCRYPTED(inode)) { |
1140 | pages[locked_pages] = | |
1141 | fscrypt_encrypt_pagecache_blocks(page, | |
1142 | PAGE_SIZE, 0, | |
1143 | locked_pages ? GFP_NOWAIT : GFP_NOFS); | |
1144 | if (IS_ERR(pages[locked_pages])) { | |
1145 | if (PTR_ERR(pages[locked_pages]) == -EINVAL) | |
38d46409 XL |
1146 | pr_err_client(cl, |
1147 | "inode->i_blkbits=%hhu\n", | |
1148 | inode->i_blkbits); | |
d5520771 JL |
1149 | /* better not fail on first page! */ |
1150 | BUG_ON(locked_pages == 0); | |
1151 | pages[locked_pages] = NULL; | |
1152 | redirty_page_for_writepage(wbc, page); | |
1153 | unlock_page(page); | |
1154 | break; | |
1155 | } | |
1156 | ++locked_pages; | |
1157 | } else { | |
1158 | pages[locked_pages++] = page; | |
1159 | } | |
0713e5f2 | 1160 | |
d5520771 | 1161 | fbatch.folios[i] = NULL; |
8ff2d290 | 1162 | len += thp_size(page); |
1d3576fd SW |
1163 | } |
1164 | ||
1165 | /* did we get anything? */ | |
1166 | if (!locked_pages) | |
590a2b5f | 1167 | goto release_folios; |
1d3576fd | 1168 | if (i) { |
0713e5f2 | 1169 | unsigned j, n = 0; |
590a2b5f VMO |
1170 | /* shift unused page to beginning of fbatch */ |
1171 | for (j = 0; j < nr_folios; j++) { | |
1172 | if (!fbatch.folios[j]) | |
0713e5f2 YZ |
1173 | continue; |
1174 | if (n < j) | |
590a2b5f | 1175 | fbatch.folios[n] = fbatch.folios[j]; |
0713e5f2 YZ |
1176 | n++; |
1177 | } | |
590a2b5f | 1178 | fbatch.nr = n; |
1d3576fd | 1179 | |
590a2b5f | 1180 | if (nr_folios && i == nr_folios && |
1d3576fd | 1181 | locked_pages < max_pages) { |
38d46409 | 1182 | doutc(cl, "reached end fbatch, trying for more\n"); |
590a2b5f | 1183 | folio_batch_release(&fbatch); |
1d3576fd SW |
1184 | goto get_more_pages; |
1185 | } | |
1d3576fd SW |
1186 | } |
1187 | ||
5b64640c | 1188 | new_request: |
d5520771 | 1189 | offset = ceph_fscrypt_page_offset(pages[0]); |
5b64640c YZ |
1190 | len = wsize; |
1191 | ||
1192 | req = ceph_osdc_new_request(&fsc->client->osdc, | |
1193 | &ci->i_layout, vino, | |
1194 | offset, &len, 0, num_ops, | |
1f934b00 YZ |
1195 | CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE, |
1196 | snapc, ceph_wbc.truncate_seq, | |
1197 | ceph_wbc.truncate_size, false); | |
5b64640c YZ |
1198 | if (IS_ERR(req)) { |
1199 | req = ceph_osdc_new_request(&fsc->client->osdc, | |
1200 | &ci->i_layout, vino, | |
1201 | offset, &len, 0, | |
1202 | min(num_ops, | |
1203 | CEPH_OSD_SLAB_OPS), | |
1204 | CEPH_OSD_OP_WRITE, | |
54ea0046 | 1205 | CEPH_OSD_FLAG_WRITE, |
1f934b00 YZ |
1206 | snapc, ceph_wbc.truncate_seq, |
1207 | ceph_wbc.truncate_size, true); | |
5b64640c | 1208 | BUG_ON(IS_ERR(req)); |
e1966b49 | 1209 | } |
d5520771 JL |
1210 | BUG_ON(len < ceph_fscrypt_page_offset(pages[locked_pages - 1]) + |
1211 | thp_size(pages[locked_pages - 1]) - offset); | |
5b64640c | 1212 | |
1464de9f XL |
1213 | if (!ceph_inc_osd_stopping_blocker(fsc->mdsc)) { |
1214 | rc = -EIO; | |
1215 | goto release_folios; | |
1216 | } | |
5b64640c YZ |
1217 | req->r_callback = writepages_finish; |
1218 | req->r_inode = inode; | |
1d3576fd | 1219 | |
5b64640c YZ |
1220 | /* Format the osd request message and submit the write */ |
1221 | len = 0; | |
1222 | data_pages = pages; | |
1223 | op_idx = 0; | |
1224 | for (i = 0; i < locked_pages; i++) { | |
d5520771 JL |
1225 | struct page *page = ceph_fscrypt_pagecache_page(pages[i]); |
1226 | ||
1227 | u64 cur_offset = page_offset(page); | |
1702e797 JL |
1228 | /* |
1229 | * Discontinuity in page range? Ceph can handle that by just passing | |
1230 | * multiple extents in the write op. | |
1231 | */ | |
5b64640c | 1232 | if (offset + len != cur_offset) { |
1702e797 | 1233 | /* If it's full, stop here */ |
3fb99d48 | 1234 | if (op_idx + 1 == req->r_num_ops) |
5b64640c | 1235 | break; |
1702e797 JL |
1236 | |
1237 | /* Kick off an fscache write with what we have so far. */ | |
1238 | ceph_fscache_write_to_cache(inode, offset, len, caching); | |
1239 | ||
1240 | /* Start a new extent */ | |
5b64640c YZ |
1241 | osd_req_op_extent_dup_last(req, op_idx, |
1242 | cur_offset - offset); | |
38d46409 XL |
1243 | doutc(cl, "got pages at %llu~%llu\n", offset, |
1244 | len); | |
5b64640c YZ |
1245 | osd_req_op_extent_osd_data_pages(req, op_idx, |
1246 | data_pages, len, 0, | |
a0102bda | 1247 | from_pool, false); |
5b64640c | 1248 | osd_req_op_extent_update(req, op_idx, len); |
e5975c7c | 1249 | |
5b64640c | 1250 | len = 0; |
1702e797 | 1251 | offset = cur_offset; |
5b64640c YZ |
1252 | data_pages = pages + i; |
1253 | op_idx++; | |
1254 | } | |
1255 | ||
d5520771 | 1256 | set_page_writeback(page); |
8ff2d290 | 1257 | len += thp_size(page); |
5b64640c | 1258 | } |
1702e797 | 1259 | ceph_fscache_write_to_cache(inode, offset, len, caching); |
5b64640c | 1260 | |
1f934b00 YZ |
1261 | if (ceph_wbc.size_stable) { |
1262 | len = min(len, ceph_wbc.i_size - offset); | |
5b64640c YZ |
1263 | } else if (i == locked_pages) { |
1264 | /* writepages_finish() clears writeback pages | |
1265 | * according to the data length, so make sure | |
1266 | * data length covers all locked pages */ | |
8ff2d290 | 1267 | u64 min_len = len + 1 - thp_size(page); |
1f934b00 YZ |
1268 | len = get_writepages_data_length(inode, pages[i - 1], |
1269 | offset); | |
5b64640c YZ |
1270 | len = max(len, min_len); |
1271 | } | |
d5520771 JL |
1272 | if (IS_ENCRYPTED(inode)) |
1273 | len = round_up(len, CEPH_FSCRYPT_BLOCK_SIZE); | |
1274 | ||
38d46409 | 1275 | doutc(cl, "got pages at %llu~%llu\n", offset, len); |
e5975c7c | 1276 | |
d5520771 JL |
1277 | if (IS_ENCRYPTED(inode) && |
1278 | ((offset | len) & ~CEPH_FSCRYPT_BLOCK_MASK)) | |
38d46409 XL |
1279 | pr_warn_client(cl, |
1280 | "bad encrypted write offset=%lld len=%llu\n", | |
1281 | offset, len); | |
d5520771 | 1282 | |
5b64640c | 1283 | osd_req_op_extent_osd_data_pages(req, op_idx, data_pages, len, |
a0102bda | 1284 | 0, from_pool, false); |
5b64640c | 1285 | osd_req_op_extent_update(req, op_idx, len); |
e5975c7c | 1286 | |
5b64640c YZ |
1287 | BUG_ON(op_idx + 1 != req->r_num_ops); |
1288 | ||
a0102bda | 1289 | from_pool = false; |
5b64640c YZ |
1290 | if (i < locked_pages) { |
1291 | BUG_ON(num_ops <= req->r_num_ops); | |
1292 | num_ops -= req->r_num_ops; | |
5b64640c YZ |
1293 | locked_pages -= i; |
1294 | ||
1295 | /* allocate new pages array for next request */ | |
1296 | data_pages = pages; | |
6da2ec56 KC |
1297 | pages = kmalloc_array(locked_pages, sizeof(*pages), |
1298 | GFP_NOFS); | |
5b64640c | 1299 | if (!pages) { |
a0102bda JL |
1300 | from_pool = true; |
1301 | pages = mempool_alloc(ceph_wb_pagevec_pool, GFP_NOFS); | |
5b64640c YZ |
1302 | BUG_ON(!pages); |
1303 | } | |
1304 | memcpy(pages, data_pages + i, | |
1305 | locked_pages * sizeof(*pages)); | |
1306 | memset(data_pages + i, 0, | |
1307 | locked_pages * sizeof(*pages)); | |
1308 | } else { | |
1309 | BUG_ON(num_ops != req->r_num_ops); | |
1310 | index = pages[i - 1]->index + 1; | |
1311 | /* request message now owns the pages array */ | |
1312 | pages = NULL; | |
1313 | } | |
e5975c7c | 1314 | |
c453bdb5 | 1315 | req->r_mtime = inode_get_mtime(inode); |
a8af0d68 | 1316 | ceph_osdc_start_request(&fsc->client->osdc, req); |
1d3576fd SW |
1317 | req = NULL; |
1318 | ||
5b64640c YZ |
1319 | wbc->nr_to_write -= i; |
1320 | if (pages) | |
1321 | goto new_request; | |
1322 | ||
2a2d927e YZ |
1323 | /* |
1324 | * We stop writing back only if we are not doing | |
1325 | * integrity sync. In case of integrity sync we have to | |
1326 | * keep going until we have written all the pages | |
1327 | * we tagged for writeback prior to entering this loop. | |
1328 | */ | |
1329 | if (wbc->nr_to_write <= 0 && wbc->sync_mode == WB_SYNC_NONE) | |
af9cc401 | 1330 | done = true; |
1d3576fd | 1331 | |
590a2b5f | 1332 | release_folios: |
38d46409 XL |
1333 | doutc(cl, "folio_batch release on %d folios (%p)\n", |
1334 | (int)fbatch.nr, fbatch.nr ? fbatch.folios[0] : NULL); | |
590a2b5f | 1335 | folio_batch_release(&fbatch); |
1d3576fd SW |
1336 | } |
1337 | ||
1338 | if (should_loop && !done) { | |
1339 | /* more to do; loop back to beginning of file */ | |
38d46409 | 1340 | doutc(cl, "looping back to beginning of file\n"); |
2a2d927e | 1341 | end = start_index - 1; /* OK even when start_index == 0 */ |
f275635e YZ |
1342 | |
1343 | /* to write dirty pages associated with next snapc, | |
1344 | * we need to wait until current writes complete */ | |
1345 | if (wbc->sync_mode != WB_SYNC_NONE && | |
1346 | start_index == 0 && /* all dirty pages were checked */ | |
1347 | !ceph_wbc.head_snapc) { | |
1348 | struct page *page; | |
1349 | unsigned i, nr; | |
1350 | index = 0; | |
1351 | while ((index <= end) && | |
590a2b5f VMO |
1352 | (nr = filemap_get_folios_tag(mapping, &index, |
1353 | (pgoff_t)-1, | |
1354 | PAGECACHE_TAG_WRITEBACK, | |
1355 | &fbatch))) { | |
f275635e | 1356 | for (i = 0; i < nr; i++) { |
590a2b5f | 1357 | page = &fbatch.folios[i]->page; |
f275635e YZ |
1358 | if (page_snap_context(page) != snapc) |
1359 | continue; | |
1360 | wait_on_page_writeback(page); | |
1361 | } | |
590a2b5f | 1362 | folio_batch_release(&fbatch); |
f275635e YZ |
1363 | cond_resched(); |
1364 | } | |
1365 | } | |
1366 | ||
2a2d927e | 1367 | start_index = 0; |
1d3576fd SW |
1368 | index = 0; |
1369 | goto retry; | |
1370 | } | |
1371 | ||
1372 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1373 | mapping->writeback_index = index; | |
1374 | ||
1375 | out: | |
3ed97d63 | 1376 | ceph_osdc_put_request(req); |
2a2d927e | 1377 | ceph_put_snap_context(last_snapc); |
38d46409 XL |
1378 | doutc(cl, "%llx.%llx dend - startone, rc = %d\n", ceph_vinop(inode), |
1379 | rc); | |
1d3576fd SW |
1380 | return rc; |
1381 | } | |
1382 | ||
1383 | ||
1384 | ||
1385 | /* | |
1386 | * See if a given @snapc is either writeable, or already written. | |
1387 | */ | |
1388 | static int context_is_writeable_or_written(struct inode *inode, | |
1389 | struct ceph_snap_context *snapc) | |
1390 | { | |
05455e11 | 1391 | struct ceph_snap_context *oldest = get_oldest_context(inode, NULL, NULL); |
6298a337 SW |
1392 | int ret = !oldest || snapc->seq <= oldest->seq; |
1393 | ||
1394 | ceph_put_snap_context(oldest); | |
1395 | return ret; | |
1d3576fd SW |
1396 | } |
1397 | ||
18d620f0 JL |
1398 | /** |
1399 | * ceph_find_incompatible - find an incompatible context and return it | |
18d620f0 | 1400 | * @page: page being dirtied |
8f883c24 | 1401 | * |
18d620f0 JL |
1402 | * We are only allowed to write into/dirty a page if the page is |
1403 | * clean, or already dirty within the same snap context. Returns a | |
1404 | * conflicting context if there is one, NULL if there isn't, or a | |
1405 | * negative error code on other errors. | |
1406 | * | |
1407 | * Must be called with page lock held. | |
1d3576fd | 1408 | */ |
18d620f0 | 1409 | static struct ceph_snap_context * |
d45156bf | 1410 | ceph_find_incompatible(struct page *page) |
1d3576fd | 1411 | { |
d45156bf | 1412 | struct inode *inode = page->mapping->host; |
38d46409 | 1413 | struct ceph_client *cl = ceph_inode_to_client(inode); |
1d3576fd | 1414 | struct ceph_inode_info *ci = ceph_inode(inode); |
1d3576fd | 1415 | |
5d6451b1 | 1416 | if (ceph_inode_is_shutdown(inode)) { |
38d46409 XL |
1417 | doutc(cl, " %llx.%llx page %p is shutdown\n", |
1418 | ceph_vinop(inode), page); | |
5d6451b1 | 1419 | return ERR_PTR(-ESTALE); |
6c93df5d YZ |
1420 | } |
1421 | ||
18d620f0 JL |
1422 | for (;;) { |
1423 | struct ceph_snap_context *snapc, *oldest; | |
1424 | ||
1425 | wait_on_page_writeback(page); | |
1426 | ||
1427 | snapc = page_snap_context(page); | |
1428 | if (!snapc || snapc == ci->i_head_snapc) | |
1429 | break; | |
1d3576fd | 1430 | |
1d3576fd SW |
1431 | /* |
1432 | * this page is already dirty in another (older) snap | |
1433 | * context! is it writeable now? | |
1434 | */ | |
05455e11 | 1435 | oldest = get_oldest_context(inode, NULL, NULL); |
80e755fe | 1436 | if (snapc->seq > oldest->seq) { |
18d620f0 | 1437 | /* not writeable -- return it for the caller to deal with */ |
6298a337 | 1438 | ceph_put_snap_context(oldest); |
38d46409 XL |
1439 | doutc(cl, " %llx.%llx page %p snapc %p not current or oldest\n", |
1440 | ceph_vinop(inode), page, snapc); | |
18d620f0 | 1441 | return ceph_get_snap_context(snapc); |
1d3576fd | 1442 | } |
6298a337 | 1443 | ceph_put_snap_context(oldest); |
1d3576fd SW |
1444 | |
1445 | /* yay, writeable, do it now (without dropping page lock) */ | |
38d46409 XL |
1446 | doutc(cl, " %llx.%llx page %p snapc %p not current, but oldest\n", |
1447 | ceph_vinop(inode), page, snapc); | |
18d620f0 JL |
1448 | if (clear_page_dirty_for_io(page)) { |
1449 | int r = writepage_nounlock(page, NULL); | |
1450 | if (r < 0) | |
1451 | return ERR_PTR(r); | |
1452 | } | |
1453 | } | |
1454 | return NULL; | |
1455 | } | |
1456 | ||
d801327d | 1457 | static int ceph_netfs_check_write_begin(struct file *file, loff_t pos, unsigned int len, |
fac47b43 | 1458 | struct folio **foliop, void **_fsdata) |
d801327d JL |
1459 | { |
1460 | struct inode *inode = file_inode(file); | |
1461 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1462 | struct ceph_snap_context *snapc; | |
1463 | ||
fac47b43 | 1464 | snapc = ceph_find_incompatible(folio_page(*foliop, 0)); |
d801327d JL |
1465 | if (snapc) { |
1466 | int r; | |
1467 | ||
fac47b43 XL |
1468 | folio_unlock(*foliop); |
1469 | folio_put(*foliop); | |
1470 | *foliop = NULL; | |
d801327d JL |
1471 | if (IS_ERR(snapc)) |
1472 | return PTR_ERR(snapc); | |
1473 | ||
1474 | ceph_queue_writeback(inode); | |
1475 | r = wait_event_killable(ci->i_cap_wq, | |
1476 | context_is_writeable_or_written(inode, snapc)); | |
1477 | ceph_put_snap_context(snapc); | |
1478 | return r == 0 ? -EAGAIN : r; | |
1479 | } | |
1480 | return 0; | |
1481 | } | |
1482 | ||
18d620f0 JL |
1483 | /* |
1484 | * We are only allowed to write into/dirty the page if the page is | |
1485 | * clean, or already dirty within the same snap context. | |
18d620f0 | 1486 | */ |
1cc16990 | 1487 | static int ceph_write_begin(struct file *file, struct address_space *mapping, |
9d6b0cd7 | 1488 | loff_t pos, unsigned len, |
1cc16990 | 1489 | struct page **pagep, void **fsdata) |
18d620f0 JL |
1490 | { |
1491 | struct inode *inode = file_inode(file); | |
e81fb419 | 1492 | struct ceph_inode_info *ci = ceph_inode(inode); |
78525c74 | 1493 | struct folio *folio = NULL; |
d801327d | 1494 | int r; |
1d3576fd | 1495 | |
e81fb419 | 1496 | r = netfs_write_begin(&ci->netfs, file, inode->i_mapping, pos, len, &folio, NULL); |
c460f4e4 XL |
1497 | if (r < 0) |
1498 | return r; | |
1499 | ||
2e9d7e4b | 1500 | folio_wait_private_2(folio); /* [DEPRECATED] */ |
c460f4e4 XL |
1501 | WARN_ON_ONCE(!folio_test_locked(folio)); |
1502 | *pagep = &folio->page; | |
1503 | return 0; | |
4af6b225 YS |
1504 | } |
1505 | ||
1d3576fd SW |
1506 | /* |
1507 | * we don't do anything in here that simple_write_end doesn't do | |
5dda377c | 1508 | * except adjust dirty page accounting |
1d3576fd SW |
1509 | */ |
1510 | static int ceph_write_end(struct file *file, struct address_space *mapping, | |
1511 | loff_t pos, unsigned len, unsigned copied, | |
78525c74 | 1512 | struct page *subpage, void *fsdata) |
1d3576fd | 1513 | { |
78525c74 | 1514 | struct folio *folio = page_folio(subpage); |
496ad9aa | 1515 | struct inode *inode = file_inode(file); |
38d46409 | 1516 | struct ceph_client *cl = ceph_inode_to_client(inode); |
efb0ca76 | 1517 | bool check_cap = false; |
1d3576fd | 1518 | |
38d46409 XL |
1519 | doutc(cl, "%llx.%llx file %p folio %p %d~%d (%d)\n", ceph_vinop(inode), |
1520 | file, folio, (int)pos, (int)copied, (int)len); | |
1d3576fd | 1521 | |
78525c74 | 1522 | if (!folio_test_uptodate(folio)) { |
ce3a8732 | 1523 | /* just return that nothing was copied on a short copy */ |
b9de313c AV |
1524 | if (copied < len) { |
1525 | copied = 0; | |
1526 | goto out; | |
1527 | } | |
78525c74 | 1528 | folio_mark_uptodate(folio); |
b9de313c | 1529 | } |
1d3576fd SW |
1530 | |
1531 | /* did file size increase? */ | |
99c88e69 | 1532 | if (pos+copied > i_size_read(inode)) |
1d3576fd SW |
1533 | check_cap = ceph_inode_set_size(inode, pos+copied); |
1534 | ||
78525c74 | 1535 | folio_mark_dirty(folio); |
1d3576fd | 1536 | |
b9de313c | 1537 | out: |
78525c74 DH |
1538 | folio_unlock(folio); |
1539 | folio_put(folio); | |
1d3576fd SW |
1540 | |
1541 | if (check_cap) | |
e4b731cc | 1542 | ceph_check_caps(ceph_inode(inode), CHECK_CAPS_AUTHONLY); |
1d3576fd SW |
1543 | |
1544 | return copied; | |
1545 | } | |
1546 | ||
1d3576fd | 1547 | const struct address_space_operations ceph_aops = { |
6c62371b | 1548 | .read_folio = netfs_read_folio, |
bc899ee1 | 1549 | .readahead = netfs_readahead, |
1d3576fd SW |
1550 | .writepage = ceph_writepage, |
1551 | .writepages = ceph_writepages_start, | |
1552 | .write_begin = ceph_write_begin, | |
1553 | .write_end = ceph_write_end, | |
8fb72b4a | 1554 | .dirty_folio = ceph_dirty_folio, |
9872f4de | 1555 | .invalidate_folio = ceph_invalidate_folio, |
c1ec4d7c | 1556 | .release_folio = netfs_release_folio, |
9c43ff44 | 1557 | .direct_IO = noop_direct_IO, |
1d3576fd SW |
1558 | }; |
1559 | ||
4f7e89f6 YZ |
1560 | static void ceph_block_sigs(sigset_t *oldset) |
1561 | { | |
1562 | sigset_t mask; | |
1563 | siginitsetinv(&mask, sigmask(SIGKILL)); | |
1564 | sigprocmask(SIG_BLOCK, &mask, oldset); | |
1565 | } | |
1566 | ||
1567 | static void ceph_restore_sigs(sigset_t *oldset) | |
1568 | { | |
1569 | sigprocmask(SIG_SETMASK, oldset, NULL); | |
1570 | } | |
1d3576fd SW |
1571 | |
1572 | /* | |
1573 | * vm ops | |
1574 | */ | |
24499847 | 1575 | static vm_fault_t ceph_filemap_fault(struct vm_fault *vmf) |
61f68816 | 1576 | { |
11bac800 | 1577 | struct vm_area_struct *vma = vmf->vma; |
61f68816 YZ |
1578 | struct inode *inode = file_inode(vma->vm_file); |
1579 | struct ceph_inode_info *ci = ceph_inode(inode); | |
38d46409 | 1580 | struct ceph_client *cl = ceph_inode_to_client(inode); |
61f68816 | 1581 | struct ceph_file_info *fi = vma->vm_file->private_data; |
c403c3a2 | 1582 | loff_t off = (loff_t)vmf->pgoff << PAGE_SHIFT; |
24499847 | 1583 | int want, got, err; |
4f7e89f6 | 1584 | sigset_t oldset; |
24499847 | 1585 | vm_fault_t ret = VM_FAULT_SIGBUS; |
4f7e89f6 | 1586 | |
5d6451b1 JL |
1587 | if (ceph_inode_is_shutdown(inode)) |
1588 | return ret; | |
1589 | ||
4f7e89f6 | 1590 | ceph_block_sigs(&oldset); |
61f68816 | 1591 | |
38d46409 XL |
1592 | doutc(cl, "%llx.%llx %llu trying to get caps\n", |
1593 | ceph_vinop(inode), off); | |
61f68816 YZ |
1594 | if (fi->fmode & CEPH_FILE_MODE_LAZY) |
1595 | want = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO; | |
1596 | else | |
1597 | want = CEPH_CAP_FILE_CACHE; | |
4f7e89f6 YZ |
1598 | |
1599 | got = 0; | |
e72968e1 | 1600 | err = ceph_get_caps(vma->vm_file, CEPH_CAP_FILE_RD, want, -1, &got); |
24499847 | 1601 | if (err < 0) |
4f7e89f6 | 1602 | goto out_restore; |
6ce026e4 | 1603 | |
38d46409 XL |
1604 | doutc(cl, "%llx.%llx %llu got cap refs on %s\n", ceph_vinop(inode), |
1605 | off, ceph_cap_string(got)); | |
61f68816 | 1606 | |
83701246 | 1607 | if ((got & (CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO)) || |
48490776 | 1608 | !ceph_has_inline_data(ci)) { |
5d988308 YZ |
1609 | CEPH_DEFINE_RW_CONTEXT(rw_ctx, got); |
1610 | ceph_add_rw_context(fi, &rw_ctx); | |
11bac800 | 1611 | ret = filemap_fault(vmf); |
5d988308 | 1612 | ceph_del_rw_context(fi, &rw_ctx); |
38d46409 XL |
1613 | doutc(cl, "%llx.%llx %llu drop cap refs %s ret %x\n", |
1614 | ceph_vinop(inode), off, ceph_cap_string(got), ret); | |
2b1ac852 | 1615 | } else |
24499847 | 1616 | err = -EAGAIN; |
61f68816 | 1617 | |
61f68816 YZ |
1618 | ceph_put_cap_refs(ci, got); |
1619 | ||
24499847 | 1620 | if (err != -EAGAIN) |
4f7e89f6 | 1621 | goto out_restore; |
83701246 YZ |
1622 | |
1623 | /* read inline data */ | |
09cbfeaf | 1624 | if (off >= PAGE_SIZE) { |
83701246 YZ |
1625 | /* does not support inline data > PAGE_SIZE */ |
1626 | ret = VM_FAULT_SIGBUS; | |
1627 | } else { | |
83701246 | 1628 | struct address_space *mapping = inode->i_mapping; |
057ba5b2 JK |
1629 | struct page *page; |
1630 | ||
1631 | filemap_invalidate_lock_shared(mapping); | |
1632 | page = find_or_create_page(mapping, 0, | |
1633 | mapping_gfp_constraint(mapping, ~__GFP_FS)); | |
83701246 YZ |
1634 | if (!page) { |
1635 | ret = VM_FAULT_OOM; | |
4f7e89f6 | 1636 | goto out_inline; |
83701246 | 1637 | } |
24499847 | 1638 | err = __ceph_do_getattr(inode, page, |
83701246 | 1639 | CEPH_STAT_CAP_INLINE_DATA, true); |
24499847 | 1640 | if (err < 0 || off >= i_size_read(inode)) { |
83701246 | 1641 | unlock_page(page); |
09cbfeaf | 1642 | put_page(page); |
c64a2b05 | 1643 | ret = vmf_error(err); |
4f7e89f6 | 1644 | goto out_inline; |
83701246 | 1645 | } |
24499847 SJ |
1646 | if (err < PAGE_SIZE) |
1647 | zero_user_segment(page, err, PAGE_SIZE); | |
83701246 YZ |
1648 | else |
1649 | flush_dcache_page(page); | |
1650 | SetPageUptodate(page); | |
1651 | vmf->page = page; | |
1652 | ret = VM_FAULT_MAJOR | VM_FAULT_LOCKED; | |
4f7e89f6 | 1653 | out_inline: |
057ba5b2 | 1654 | filemap_invalidate_unlock_shared(mapping); |
38d46409 XL |
1655 | doutc(cl, "%llx.%llx %llu read inline data ret %x\n", |
1656 | ceph_vinop(inode), off, ret); | |
83701246 | 1657 | } |
4f7e89f6 YZ |
1658 | out_restore: |
1659 | ceph_restore_sigs(&oldset); | |
24499847 SJ |
1660 | if (err < 0) |
1661 | ret = vmf_error(err); | |
6ce026e4 | 1662 | |
61f68816 YZ |
1663 | return ret; |
1664 | } | |
1d3576fd | 1665 | |
24499847 | 1666 | static vm_fault_t ceph_page_mkwrite(struct vm_fault *vmf) |
1d3576fd | 1667 | { |
11bac800 | 1668 | struct vm_area_struct *vma = vmf->vma; |
496ad9aa | 1669 | struct inode *inode = file_inode(vma->vm_file); |
38d46409 | 1670 | struct ceph_client *cl = ceph_inode_to_client(inode); |
61f68816 YZ |
1671 | struct ceph_inode_info *ci = ceph_inode(inode); |
1672 | struct ceph_file_info *fi = vma->vm_file->private_data; | |
f66fd9f0 | 1673 | struct ceph_cap_flush *prealloc_cf; |
61f68816 | 1674 | struct page *page = vmf->page; |
6285bc23 | 1675 | loff_t off = page_offset(page); |
61f68816 YZ |
1676 | loff_t size = i_size_read(inode); |
1677 | size_t len; | |
24499847 | 1678 | int want, got, err; |
4f7e89f6 | 1679 | sigset_t oldset; |
24499847 | 1680 | vm_fault_t ret = VM_FAULT_SIGBUS; |
3ca9c3bd | 1681 | |
5d6451b1 JL |
1682 | if (ceph_inode_is_shutdown(inode)) |
1683 | return ret; | |
1684 | ||
f66fd9f0 YZ |
1685 | prealloc_cf = ceph_alloc_cap_flush(); |
1686 | if (!prealloc_cf) | |
6ce026e4 | 1687 | return VM_FAULT_OOM; |
f66fd9f0 | 1688 | |
249c1df5 | 1689 | sb_start_pagefault(inode->i_sb); |
4f7e89f6 | 1690 | ceph_block_sigs(&oldset); |
f66fd9f0 | 1691 | |
8ff2d290 JL |
1692 | if (off + thp_size(page) <= size) |
1693 | len = thp_size(page); | |
1d3576fd | 1694 | else |
8ff2d290 | 1695 | len = offset_in_thp(page, size); |
1d3576fd | 1696 | |
38d46409 XL |
1697 | doutc(cl, "%llx.%llx %llu~%zd getting caps i_size %llu\n", |
1698 | ceph_vinop(inode), off, len, size); | |
61f68816 YZ |
1699 | if (fi->fmode & CEPH_FILE_MODE_LAZY) |
1700 | want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO; | |
1701 | else | |
1702 | want = CEPH_CAP_FILE_BUFFER; | |
4f7e89f6 YZ |
1703 | |
1704 | got = 0; | |
e72968e1 | 1705 | err = ceph_get_caps(vma->vm_file, CEPH_CAP_FILE_WR, want, off + len, &got); |
24499847 | 1706 | if (err < 0) |
4f7e89f6 | 1707 | goto out_free; |
6ce026e4 | 1708 | |
38d46409 XL |
1709 | doutc(cl, "%llx.%llx %llu~%zd got cap refs on %s\n", ceph_vinop(inode), |
1710 | off, len, ceph_cap_string(got)); | |
61f68816 YZ |
1711 | |
1712 | /* Update time before taking page lock */ | |
1713 | file_update_time(vma->vm_file); | |
5c308356 | 1714 | inode_inc_iversion_raw(inode); |
4af6b225 | 1715 | |
f0b33df5 | 1716 | do { |
d45156bf JL |
1717 | struct ceph_snap_context *snapc; |
1718 | ||
f0b33df5 | 1719 | lock_page(page); |
4af6b225 | 1720 | |
cb03c143 | 1721 | if (page_mkwrite_check_truncate(page, inode) < 0) { |
f0b33df5 YZ |
1722 | unlock_page(page); |
1723 | ret = VM_FAULT_NOPAGE; | |
1724 | break; | |
1725 | } | |
1726 | ||
d45156bf JL |
1727 | snapc = ceph_find_incompatible(page); |
1728 | if (!snapc) { | |
f0b33df5 YZ |
1729 | /* success. we'll keep the page locked. */ |
1730 | set_page_dirty(page); | |
1731 | ret = VM_FAULT_LOCKED; | |
d45156bf JL |
1732 | break; |
1733 | } | |
1734 | ||
1735 | unlock_page(page); | |
1736 | ||
1737 | if (IS_ERR(snapc)) { | |
1738 | ret = VM_FAULT_SIGBUS; | |
1739 | break; | |
f0b33df5 | 1740 | } |
d45156bf JL |
1741 | |
1742 | ceph_queue_writeback(inode); | |
1743 | err = wait_event_killable(ci->i_cap_wq, | |
1744 | context_is_writeable_or_written(inode, snapc)); | |
1745 | ceph_put_snap_context(snapc); | |
1746 | } while (err == 0); | |
4af6b225 | 1747 | |
083db6fd | 1748 | if (ret == VM_FAULT_LOCKED) { |
61f68816 YZ |
1749 | int dirty; |
1750 | spin_lock(&ci->i_ceph_lock); | |
f66fd9f0 YZ |
1751 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, |
1752 | &prealloc_cf); | |
61f68816 YZ |
1753 | spin_unlock(&ci->i_ceph_lock); |
1754 | if (dirty) | |
1755 | __mark_inode_dirty(inode, dirty); | |
1756 | } | |
1757 | ||
38d46409 XL |
1758 | doutc(cl, "%llx.%llx %llu~%zd dropping cap refs on %s ret %x\n", |
1759 | ceph_vinop(inode), off, len, ceph_cap_string(got), ret); | |
a8810cdc | 1760 | ceph_put_cap_refs_async(ci, got); |
f66fd9f0 | 1761 | out_free: |
4f7e89f6 | 1762 | ceph_restore_sigs(&oldset); |
249c1df5 | 1763 | sb_end_pagefault(inode->i_sb); |
f66fd9f0 | 1764 | ceph_free_cap_flush(prealloc_cf); |
24499847 SJ |
1765 | if (err < 0) |
1766 | ret = vmf_error(err); | |
1d3576fd SW |
1767 | return ret; |
1768 | } | |
1769 | ||
31c542a1 YZ |
1770 | void ceph_fill_inline_data(struct inode *inode, struct page *locked_page, |
1771 | char *data, size_t len) | |
1772 | { | |
38d46409 | 1773 | struct ceph_client *cl = ceph_inode_to_client(inode); |
31c542a1 YZ |
1774 | struct address_space *mapping = inode->i_mapping; |
1775 | struct page *page; | |
1776 | ||
1777 | if (locked_page) { | |
1778 | page = locked_page; | |
1779 | } else { | |
1780 | if (i_size_read(inode) == 0) | |
1781 | return; | |
1782 | page = find_or_create_page(mapping, 0, | |
c62d2555 MH |
1783 | mapping_gfp_constraint(mapping, |
1784 | ~__GFP_FS)); | |
31c542a1 YZ |
1785 | if (!page) |
1786 | return; | |
1787 | if (PageUptodate(page)) { | |
1788 | unlock_page(page); | |
09cbfeaf | 1789 | put_page(page); |
31c542a1 YZ |
1790 | return; |
1791 | } | |
1792 | } | |
1793 | ||
38d46409 XL |
1794 | doutc(cl, "%p %llx.%llx len %zu locked_page %p\n", inode, |
1795 | ceph_vinop(inode), len, locked_page); | |
31c542a1 YZ |
1796 | |
1797 | if (len > 0) { | |
1798 | void *kaddr = kmap_atomic(page); | |
1799 | memcpy(kaddr, data, len); | |
1800 | kunmap_atomic(kaddr); | |
1801 | } | |
1802 | ||
1803 | if (page != locked_page) { | |
09cbfeaf KS |
1804 | if (len < PAGE_SIZE) |
1805 | zero_user_segment(page, len, PAGE_SIZE); | |
31c542a1 YZ |
1806 | else |
1807 | flush_dcache_page(page); | |
1808 | ||
1809 | SetPageUptodate(page); | |
1810 | unlock_page(page); | |
09cbfeaf | 1811 | put_page(page); |
31c542a1 YZ |
1812 | } |
1813 | } | |
1814 | ||
083db6fd | 1815 | int ceph_uninline_data(struct file *file) |
28127bdd | 1816 | { |
083db6fd | 1817 | struct inode *inode = file_inode(file); |
28127bdd | 1818 | struct ceph_inode_info *ci = ceph_inode(inode); |
5995d90d | 1819 | struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); |
38d46409 | 1820 | struct ceph_client *cl = fsc->client; |
825978fd | 1821 | struct ceph_osd_request *req = NULL; |
a68e564a | 1822 | struct ceph_cap_flush *prealloc_cf = NULL; |
083db6fd | 1823 | struct folio *folio = NULL; |
c38af982 | 1824 | u64 inline_version = CEPH_INLINE_NONE; |
083db6fd | 1825 | struct page *pages[1]; |
28127bdd | 1826 | int err = 0; |
c38af982 | 1827 | u64 len; |
083db6fd | 1828 | |
825978fd XL |
1829 | spin_lock(&ci->i_ceph_lock); |
1830 | inline_version = ci->i_inline_version; | |
1831 | spin_unlock(&ci->i_ceph_lock); | |
1832 | ||
38d46409 XL |
1833 | doutc(cl, "%llx.%llx inline_version %llu\n", ceph_vinop(inode), |
1834 | inline_version); | |
825978fd | 1835 | |
a68e564a XL |
1836 | if (ceph_inode_is_shutdown(inode)) { |
1837 | err = -EIO; | |
1838 | goto out; | |
1839 | } | |
1840 | ||
825978fd XL |
1841 | if (inline_version == CEPH_INLINE_NONE) |
1842 | return 0; | |
1843 | ||
083db6fd DH |
1844 | prealloc_cf = ceph_alloc_cap_flush(); |
1845 | if (!prealloc_cf) | |
1846 | return -ENOMEM; | |
1847 | ||
825978fd XL |
1848 | if (inline_version == 1) /* initial version, no data */ |
1849 | goto out_uninline; | |
1850 | ||
083db6fd DH |
1851 | folio = read_mapping_folio(inode->i_mapping, 0, file); |
1852 | if (IS_ERR(folio)) { | |
1853 | err = PTR_ERR(folio); | |
1854 | goto out; | |
1855 | } | |
1856 | ||
1857 | folio_lock(folio); | |
28127bdd | 1858 | |
083db6fd DH |
1859 | len = i_size_read(inode); |
1860 | if (len > folio_size(folio)) | |
1861 | len = folio_size(folio); | |
28127bdd YZ |
1862 | |
1863 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
1864 | ceph_vino(inode), 0, &len, 0, 1, | |
54ea0046 | 1865 | CEPH_OSD_OP_CREATE, CEPH_OSD_FLAG_WRITE, |
34b759b4 | 1866 | NULL, 0, 0, false); |
28127bdd YZ |
1867 | if (IS_ERR(req)) { |
1868 | err = PTR_ERR(req); | |
083db6fd | 1869 | goto out_unlock; |
28127bdd YZ |
1870 | } |
1871 | ||
c453bdb5 | 1872 | req->r_mtime = inode_get_mtime(inode); |
a8af0d68 JL |
1873 | ceph_osdc_start_request(&fsc->client->osdc, req); |
1874 | err = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
28127bdd YZ |
1875 | ceph_osdc_put_request(req); |
1876 | if (err < 0) | |
083db6fd | 1877 | goto out_unlock; |
28127bdd YZ |
1878 | |
1879 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
1880 | ceph_vino(inode), 0, &len, 1, 3, | |
54ea0046 | 1881 | CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE, |
34b759b4 ID |
1882 | NULL, ci->i_truncate_seq, |
1883 | ci->i_truncate_size, false); | |
28127bdd YZ |
1884 | if (IS_ERR(req)) { |
1885 | err = PTR_ERR(req); | |
083db6fd | 1886 | goto out_unlock; |
28127bdd YZ |
1887 | } |
1888 | ||
083db6fd DH |
1889 | pages[0] = folio_page(folio, 0); |
1890 | osd_req_op_extent_osd_data_pages(req, 1, pages, len, 0, false, false); | |
28127bdd | 1891 | |
ec137c10 YZ |
1892 | { |
1893 | __le64 xattr_buf = cpu_to_le64(inline_version); | |
1894 | err = osd_req_op_xattr_init(req, 0, CEPH_OSD_OP_CMPXATTR, | |
1895 | "inline_version", &xattr_buf, | |
1896 | sizeof(xattr_buf), | |
1897 | CEPH_OSD_CMPXATTR_OP_GT, | |
1898 | CEPH_OSD_CMPXATTR_MODE_U64); | |
1899 | if (err) | |
083db6fd | 1900 | goto out_put_req; |
ec137c10 YZ |
1901 | } |
1902 | ||
1903 | { | |
1904 | char xattr_buf[32]; | |
1905 | int xattr_len = snprintf(xattr_buf, sizeof(xattr_buf), | |
1906 | "%llu", inline_version); | |
1907 | err = osd_req_op_xattr_init(req, 2, CEPH_OSD_OP_SETXATTR, | |
1908 | "inline_version", | |
1909 | xattr_buf, xattr_len, 0, 0); | |
1910 | if (err) | |
083db6fd | 1911 | goto out_put_req; |
ec137c10 | 1912 | } |
28127bdd | 1913 | |
c453bdb5 | 1914 | req->r_mtime = inode_get_mtime(inode); |
a8af0d68 JL |
1915 | ceph_osdc_start_request(&fsc->client->osdc, req); |
1916 | err = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
97e27aaa | 1917 | |
8ae99ae2 | 1918 | ceph_update_write_metrics(&fsc->mdsc->metric, req->r_start_latency, |
903f4fec | 1919 | req->r_end_latency, len, err); |
97e27aaa | 1920 | |
825978fd | 1921 | out_uninline: |
083db6fd DH |
1922 | if (!err) { |
1923 | int dirty; | |
1924 | ||
1925 | /* Set to CAP_INLINE_NONE and dirty the caps */ | |
1926 | down_read(&fsc->mdsc->snap_rwsem); | |
1927 | spin_lock(&ci->i_ceph_lock); | |
1928 | ci->i_inline_version = CEPH_INLINE_NONE; | |
1929 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, &prealloc_cf); | |
1930 | spin_unlock(&ci->i_ceph_lock); | |
1931 | up_read(&fsc->mdsc->snap_rwsem); | |
1932 | if (dirty) | |
1933 | __mark_inode_dirty(inode, dirty); | |
1934 | } | |
1935 | out_put_req: | |
28127bdd YZ |
1936 | ceph_osdc_put_request(req); |
1937 | if (err == -ECANCELED) | |
1938 | err = 0; | |
083db6fd | 1939 | out_unlock: |
825978fd XL |
1940 | if (folio) { |
1941 | folio_unlock(folio); | |
1942 | folio_put(folio); | |
1943 | } | |
28127bdd | 1944 | out: |
083db6fd | 1945 | ceph_free_cap_flush(prealloc_cf); |
38d46409 XL |
1946 | doutc(cl, "%llx.%llx inline_version %llu = %d\n", |
1947 | ceph_vinop(inode), inline_version, err); | |
28127bdd YZ |
1948 | return err; |
1949 | } | |
1950 | ||
7cbea8dc | 1951 | static const struct vm_operations_struct ceph_vmops = { |
61f68816 | 1952 | .fault = ceph_filemap_fault, |
1d3576fd SW |
1953 | .page_mkwrite = ceph_page_mkwrite, |
1954 | }; | |
1955 | ||
1956 | int ceph_mmap(struct file *file, struct vm_area_struct *vma) | |
1957 | { | |
1958 | struct address_space *mapping = file->f_mapping; | |
1959 | ||
7e0a1265 | 1960 | if (!mapping->a_ops->read_folio) |
1d3576fd | 1961 | return -ENOEXEC; |
1d3576fd | 1962 | vma->vm_ops = &ceph_vmops; |
1d3576fd SW |
1963 | return 0; |
1964 | } | |
10183a69 YZ |
1965 | |
1966 | enum { | |
1967 | POOL_READ = 1, | |
1968 | POOL_WRITE = 2, | |
1969 | }; | |
1970 | ||
779fe0fb YZ |
1971 | static int __ceph_pool_perm_get(struct ceph_inode_info *ci, |
1972 | s64 pool, struct ceph_string *pool_ns) | |
10183a69 | 1973 | { |
5995d90d | 1974 | struct ceph_fs_client *fsc = ceph_inode_to_fs_client(&ci->netfs.inode); |
10183a69 | 1975 | struct ceph_mds_client *mdsc = fsc->mdsc; |
38d46409 | 1976 | struct ceph_client *cl = fsc->client; |
10183a69 YZ |
1977 | struct ceph_osd_request *rd_req = NULL, *wr_req = NULL; |
1978 | struct rb_node **p, *parent; | |
1979 | struct ceph_pool_perm *perm; | |
1980 | struct page **pages; | |
779fe0fb | 1981 | size_t pool_ns_len; |
10183a69 YZ |
1982 | int err = 0, err2 = 0, have = 0; |
1983 | ||
1984 | down_read(&mdsc->pool_perm_rwsem); | |
1985 | p = &mdsc->pool_perm_tree.rb_node; | |
1986 | while (*p) { | |
1987 | perm = rb_entry(*p, struct ceph_pool_perm, node); | |
1988 | if (pool < perm->pool) | |
1989 | p = &(*p)->rb_left; | |
1990 | else if (pool > perm->pool) | |
1991 | p = &(*p)->rb_right; | |
1992 | else { | |
779fe0fb YZ |
1993 | int ret = ceph_compare_string(pool_ns, |
1994 | perm->pool_ns, | |
1995 | perm->pool_ns_len); | |
1996 | if (ret < 0) | |
1997 | p = &(*p)->rb_left; | |
1998 | else if (ret > 0) | |
1999 | p = &(*p)->rb_right; | |
2000 | else { | |
2001 | have = perm->perm; | |
2002 | break; | |
2003 | } | |
10183a69 YZ |
2004 | } |
2005 | } | |
2006 | up_read(&mdsc->pool_perm_rwsem); | |
2007 | if (*p) | |
2008 | goto out; | |
2009 | ||
779fe0fb | 2010 | if (pool_ns) |
38d46409 XL |
2011 | doutc(cl, "pool %lld ns %.*s no perm cached\n", pool, |
2012 | (int)pool_ns->len, pool_ns->str); | |
779fe0fb | 2013 | else |
38d46409 | 2014 | doutc(cl, "pool %lld no perm cached\n", pool); |
10183a69 YZ |
2015 | |
2016 | down_write(&mdsc->pool_perm_rwsem); | |
779fe0fb | 2017 | p = &mdsc->pool_perm_tree.rb_node; |
10183a69 YZ |
2018 | parent = NULL; |
2019 | while (*p) { | |
2020 | parent = *p; | |
2021 | perm = rb_entry(parent, struct ceph_pool_perm, node); | |
2022 | if (pool < perm->pool) | |
2023 | p = &(*p)->rb_left; | |
2024 | else if (pool > perm->pool) | |
2025 | p = &(*p)->rb_right; | |
2026 | else { | |
779fe0fb YZ |
2027 | int ret = ceph_compare_string(pool_ns, |
2028 | perm->pool_ns, | |
2029 | perm->pool_ns_len); | |
2030 | if (ret < 0) | |
2031 | p = &(*p)->rb_left; | |
2032 | else if (ret > 0) | |
2033 | p = &(*p)->rb_right; | |
2034 | else { | |
2035 | have = perm->perm; | |
2036 | break; | |
2037 | } | |
10183a69 YZ |
2038 | } |
2039 | } | |
2040 | if (*p) { | |
2041 | up_write(&mdsc->pool_perm_rwsem); | |
2042 | goto out; | |
2043 | } | |
2044 | ||
34b759b4 | 2045 | rd_req = ceph_osdc_alloc_request(&fsc->client->osdc, NULL, |
10183a69 YZ |
2046 | 1, false, GFP_NOFS); |
2047 | if (!rd_req) { | |
2048 | err = -ENOMEM; | |
2049 | goto out_unlock; | |
2050 | } | |
2051 | ||
2052 | rd_req->r_flags = CEPH_OSD_FLAG_READ; | |
2053 | osd_req_op_init(rd_req, 0, CEPH_OSD_OP_STAT, 0); | |
2054 | rd_req->r_base_oloc.pool = pool; | |
779fe0fb YZ |
2055 | if (pool_ns) |
2056 | rd_req->r_base_oloc.pool_ns = ceph_get_string(pool_ns); | |
d30291b9 | 2057 | ceph_oid_printf(&rd_req->r_base_oid, "%llx.00000000", ci->i_vino.ino); |
10183a69 | 2058 | |
13d1ad16 ID |
2059 | err = ceph_osdc_alloc_messages(rd_req, GFP_NOFS); |
2060 | if (err) | |
2061 | goto out_unlock; | |
10183a69 | 2062 | |
34b759b4 | 2063 | wr_req = ceph_osdc_alloc_request(&fsc->client->osdc, NULL, |
10183a69 YZ |
2064 | 1, false, GFP_NOFS); |
2065 | if (!wr_req) { | |
2066 | err = -ENOMEM; | |
2067 | goto out_unlock; | |
2068 | } | |
2069 | ||
54ea0046 | 2070 | wr_req->r_flags = CEPH_OSD_FLAG_WRITE; |
10183a69 | 2071 | osd_req_op_init(wr_req, 0, CEPH_OSD_OP_CREATE, CEPH_OSD_OP_FLAG_EXCL); |
63244fa1 | 2072 | ceph_oloc_copy(&wr_req->r_base_oloc, &rd_req->r_base_oloc); |
d30291b9 | 2073 | ceph_oid_copy(&wr_req->r_base_oid, &rd_req->r_base_oid); |
10183a69 | 2074 | |
13d1ad16 ID |
2075 | err = ceph_osdc_alloc_messages(wr_req, GFP_NOFS); |
2076 | if (err) | |
2077 | goto out_unlock; | |
10183a69 YZ |
2078 | |
2079 | /* one page should be large enough for STAT data */ | |
2080 | pages = ceph_alloc_page_vector(1, GFP_KERNEL); | |
2081 | if (IS_ERR(pages)) { | |
2082 | err = PTR_ERR(pages); | |
2083 | goto out_unlock; | |
2084 | } | |
2085 | ||
2086 | osd_req_op_raw_data_in_pages(rd_req, 0, pages, PAGE_SIZE, | |
2087 | 0, false, true); | |
a8af0d68 | 2088 | ceph_osdc_start_request(&fsc->client->osdc, rd_req); |
10183a69 | 2089 | |
c453bdb5 | 2090 | wr_req->r_mtime = inode_get_mtime(&ci->netfs.inode); |
a8af0d68 | 2091 | ceph_osdc_start_request(&fsc->client->osdc, wr_req); |
10183a69 | 2092 | |
a8af0d68 JL |
2093 | err = ceph_osdc_wait_request(&fsc->client->osdc, rd_req); |
2094 | err2 = ceph_osdc_wait_request(&fsc->client->osdc, wr_req); | |
10183a69 YZ |
2095 | |
2096 | if (err >= 0 || err == -ENOENT) | |
2097 | have |= POOL_READ; | |
131d7eb4 | 2098 | else if (err != -EPERM) { |
0b98acd6 ID |
2099 | if (err == -EBLOCKLISTED) |
2100 | fsc->blocklisted = true; | |
10183a69 | 2101 | goto out_unlock; |
131d7eb4 | 2102 | } |
10183a69 YZ |
2103 | |
2104 | if (err2 == 0 || err2 == -EEXIST) | |
2105 | have |= POOL_WRITE; | |
2106 | else if (err2 != -EPERM) { | |
0b98acd6 ID |
2107 | if (err2 == -EBLOCKLISTED) |
2108 | fsc->blocklisted = true; | |
10183a69 YZ |
2109 | err = err2; |
2110 | goto out_unlock; | |
2111 | } | |
2112 | ||
779fe0fb YZ |
2113 | pool_ns_len = pool_ns ? pool_ns->len : 0; |
2114 | perm = kmalloc(sizeof(*perm) + pool_ns_len + 1, GFP_NOFS); | |
10183a69 YZ |
2115 | if (!perm) { |
2116 | err = -ENOMEM; | |
2117 | goto out_unlock; | |
2118 | } | |
2119 | ||
2120 | perm->pool = pool; | |
2121 | perm->perm = have; | |
779fe0fb YZ |
2122 | perm->pool_ns_len = pool_ns_len; |
2123 | if (pool_ns_len > 0) | |
2124 | memcpy(perm->pool_ns, pool_ns->str, pool_ns_len); | |
2125 | perm->pool_ns[pool_ns_len] = 0; | |
2126 | ||
10183a69 YZ |
2127 | rb_link_node(&perm->node, parent, p); |
2128 | rb_insert_color(&perm->node, &mdsc->pool_perm_tree); | |
2129 | err = 0; | |
2130 | out_unlock: | |
2131 | up_write(&mdsc->pool_perm_rwsem); | |
2132 | ||
3ed97d63 ID |
2133 | ceph_osdc_put_request(rd_req); |
2134 | ceph_osdc_put_request(wr_req); | |
10183a69 YZ |
2135 | out: |
2136 | if (!err) | |
2137 | err = have; | |
779fe0fb | 2138 | if (pool_ns) |
38d46409 XL |
2139 | doutc(cl, "pool %lld ns %.*s result = %d\n", pool, |
2140 | (int)pool_ns->len, pool_ns->str, err); | |
779fe0fb | 2141 | else |
38d46409 | 2142 | doutc(cl, "pool %lld result = %d\n", pool, err); |
10183a69 YZ |
2143 | return err; |
2144 | } | |
2145 | ||
5e3ded1b | 2146 | int ceph_pool_perm_check(struct inode *inode, int need) |
10183a69 | 2147 | { |
38d46409 | 2148 | struct ceph_client *cl = ceph_inode_to_client(inode); |
5e3ded1b | 2149 | struct ceph_inode_info *ci = ceph_inode(inode); |
779fe0fb | 2150 | struct ceph_string *pool_ns; |
5e3ded1b | 2151 | s64 pool; |
10183a69 YZ |
2152 | int ret, flags; |
2153 | ||
e9b22501 JL |
2154 | /* Only need to do this for regular files */ |
2155 | if (!S_ISREG(inode->i_mode)) | |
2156 | return 0; | |
2157 | ||
80e80fbb YZ |
2158 | if (ci->i_vino.snap != CEPH_NOSNAP) { |
2159 | /* | |
2160 | * Pool permission check needs to write to the first object. | |
2161 | * But for snapshot, head of the first object may have alread | |
2162 | * been deleted. Skip check to avoid creating orphan object. | |
2163 | */ | |
2164 | return 0; | |
2165 | } | |
2166 | ||
5995d90d | 2167 | if (ceph_test_mount_opt(ceph_inode_to_fs_client(inode), |
10183a69 YZ |
2168 | NOPOOLPERM)) |
2169 | return 0; | |
2170 | ||
2171 | spin_lock(&ci->i_ceph_lock); | |
2172 | flags = ci->i_ceph_flags; | |
7627151e | 2173 | pool = ci->i_layout.pool_id; |
10183a69 YZ |
2174 | spin_unlock(&ci->i_ceph_lock); |
2175 | check: | |
2176 | if (flags & CEPH_I_POOL_PERM) { | |
2177 | if ((need & CEPH_CAP_FILE_RD) && !(flags & CEPH_I_POOL_RD)) { | |
38d46409 | 2178 | doutc(cl, "pool %lld no read perm\n", pool); |
10183a69 YZ |
2179 | return -EPERM; |
2180 | } | |
2181 | if ((need & CEPH_CAP_FILE_WR) && !(flags & CEPH_I_POOL_WR)) { | |
38d46409 | 2182 | doutc(cl, "pool %lld no write perm\n", pool); |
10183a69 YZ |
2183 | return -EPERM; |
2184 | } | |
2185 | return 0; | |
2186 | } | |
2187 | ||
779fe0fb YZ |
2188 | pool_ns = ceph_try_get_string(ci->i_layout.pool_ns); |
2189 | ret = __ceph_pool_perm_get(ci, pool, pool_ns); | |
2190 | ceph_put_string(pool_ns); | |
10183a69 YZ |
2191 | if (ret < 0) |
2192 | return ret; | |
2193 | ||
2194 | flags = CEPH_I_POOL_PERM; | |
2195 | if (ret & POOL_READ) | |
2196 | flags |= CEPH_I_POOL_RD; | |
2197 | if (ret & POOL_WRITE) | |
2198 | flags |= CEPH_I_POOL_WR; | |
2199 | ||
2200 | spin_lock(&ci->i_ceph_lock); | |
779fe0fb YZ |
2201 | if (pool == ci->i_layout.pool_id && |
2202 | pool_ns == rcu_dereference_raw(ci->i_layout.pool_ns)) { | |
2203 | ci->i_ceph_flags |= flags; | |
10183a69 | 2204 | } else { |
7627151e | 2205 | pool = ci->i_layout.pool_id; |
10183a69 YZ |
2206 | flags = ci->i_ceph_flags; |
2207 | } | |
2208 | spin_unlock(&ci->i_ceph_lock); | |
2209 | goto check; | |
2210 | } | |
2211 | ||
2212 | void ceph_pool_perm_destroy(struct ceph_mds_client *mdsc) | |
2213 | { | |
2214 | struct ceph_pool_perm *perm; | |
2215 | struct rb_node *n; | |
2216 | ||
2217 | while (!RB_EMPTY_ROOT(&mdsc->pool_perm_tree)) { | |
2218 | n = rb_first(&mdsc->pool_perm_tree); | |
2219 | perm = rb_entry(n, struct ceph_pool_perm, node); | |
2220 | rb_erase(n, &mdsc->pool_perm_tree); | |
2221 | kfree(perm); | |
2222 | } | |
2223 | } |