17336d0e6SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2b1e71b06SSteven Whitehouse /* 3b1e71b06SSteven Whitehouse * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 4b1e71b06SSteven Whitehouse * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. 5b1e71b06SSteven Whitehouse */ 6b1e71b06SSteven Whitehouse 7b1e71b06SSteven Whitehouse #include <linux/sched.h> 8b1e71b06SSteven Whitehouse #include <linux/slab.h> 9b1e71b06SSteven Whitehouse #include <linux/spinlock.h> 10b1e71b06SSteven Whitehouse #include <linux/completion.h> 11b1e71b06SSteven Whitehouse #include <linux/buffer_head.h> 12b1e71b06SSteven Whitehouse #include <linux/pagemap.h> 13b1e71b06SSteven Whitehouse #include <linux/pagevec.h> 14b1e71b06SSteven Whitehouse #include <linux/mpage.h> 15b1e71b06SSteven Whitehouse #include <linux/fs.h> 16b1e71b06SSteven Whitehouse #include <linux/writeback.h> 17b1e71b06SSteven Whitehouse #include <linux/swap.h> 18b1e71b06SSteven Whitehouse #include <linux/gfs2_ondisk.h> 19b1e71b06SSteven Whitehouse #include <linux/backing-dev.h> 20e2e40f2cSChristoph Hellwig #include <linux/uio.h> 21774016b2SSteven Whitehouse #include <trace/events/writeback.h> 2264bc06bbSAndreas Gruenbacher #include <linux/sched/signal.h> 23b1e71b06SSteven Whitehouse 24b1e71b06SSteven Whitehouse #include "gfs2.h" 25b1e71b06SSteven Whitehouse #include "incore.h" 26b1e71b06SSteven Whitehouse #include "bmap.h" 27b1e71b06SSteven Whitehouse #include "glock.h" 28b1e71b06SSteven Whitehouse #include "inode.h" 29b1e71b06SSteven Whitehouse #include "log.h" 30b1e71b06SSteven Whitehouse #include "meta_io.h" 31b1e71b06SSteven Whitehouse #include "quota.h" 32b1e71b06SSteven Whitehouse #include "trans.h" 33b1e71b06SSteven Whitehouse #include "rgrp.h" 34b1e71b06SSteven Whitehouse #include "super.h" 35b1e71b06SSteven Whitehouse #include "util.h" 36b1e71b06SSteven Whitehouse #include "glops.h" 3764bc06bbSAndreas Gruenbacher #include "aops.h" 38b1e71b06SSteven Whitehouse 39b1e71b06SSteven Whitehouse 40c1b0c3cfSAndreas Gruenbacher void gfs2_trans_add_databufs(struct gfs2_inode *ip, struct folio *folio, 4188b65ce5SAndreas Gruenbacher unsigned int from, unsigned int len) 42b1e71b06SSteven Whitehouse { 43c1b0c3cfSAndreas Gruenbacher struct buffer_head *head = folio_buffers(folio); 44b1e71b06SSteven Whitehouse unsigned int bsize = head->b_size; 45b1e71b06SSteven Whitehouse struct buffer_head *bh; 4688b65ce5SAndreas Gruenbacher unsigned int to = from + len; 47b1e71b06SSteven Whitehouse unsigned int start, end; 48b1e71b06SSteven Whitehouse 49b1e71b06SSteven Whitehouse for (bh = head, start = 0; bh != head || !start; 50b1e71b06SSteven Whitehouse bh = bh->b_this_page, start = end) { 51b1e71b06SSteven Whitehouse end = start + bsize; 5288b65ce5SAndreas Gruenbacher if (end <= from) 53b1e71b06SSteven Whitehouse continue; 5488b65ce5SAndreas Gruenbacher if (start >= to) 5588b65ce5SAndreas Gruenbacher break; 56b1e71b06SSteven Whitehouse set_buffer_uptodate(bh); 57350a9b0aSSteven Whitehouse gfs2_trans_add_data(ip->i_gl, bh); 58b1e71b06SSteven Whitehouse } 59b1e71b06SSteven Whitehouse } 60b1e71b06SSteven Whitehouse 61b1e71b06SSteven Whitehouse /** 62b1e71b06SSteven Whitehouse * gfs2_get_block_noalloc - Fills in a buffer head with details about a block 63b1e71b06SSteven Whitehouse * @inode: The inode 64b1e71b06SSteven Whitehouse * @lblock: The block number to look up 65b1e71b06SSteven Whitehouse * @bh_result: The buffer head to return the result in 66b1e71b06SSteven Whitehouse * @create: Non-zero if we may add block to the file 67b1e71b06SSteven Whitehouse * 68b1e71b06SSteven Whitehouse * Returns: errno 69b1e71b06SSteven Whitehouse */ 70b1e71b06SSteven Whitehouse 71b1e71b06SSteven Whitehouse static int gfs2_get_block_noalloc(struct inode *inode, sector_t lblock, 72b1e71b06SSteven Whitehouse struct buffer_head *bh_result, int create) 73b1e71b06SSteven Whitehouse { 74b1e71b06SSteven Whitehouse int error; 75b1e71b06SSteven Whitehouse 76b1e71b06SSteven Whitehouse error = gfs2_block_map(inode, lblock, bh_result, 0); 77b1e71b06SSteven Whitehouse if (error) 78b1e71b06SSteven Whitehouse return error; 79b1e71b06SSteven Whitehouse if (!buffer_mapped(bh_result)) 804e79e3f0SBob Peterson return -ENODATA; 81b1e71b06SSteven Whitehouse return 0; 82b1e71b06SSteven Whitehouse } 83b1e71b06SSteven Whitehouse 84b1e71b06SSteven Whitehouse /** 8521b6924bSBob Peterson * gfs2_write_jdata_page - gfs2 jdata-specific version of block_write_full_page 8621b6924bSBob Peterson * @page: The page to write 8721b6924bSBob Peterson * @wbc: The writeback control 8821b6924bSBob Peterson * 8921b6924bSBob Peterson * This is the same as calling block_write_full_page, but it also 90fd4c5748SBenjamin Marzinski * writes pages outside of i_size 91fd4c5748SBenjamin Marzinski */ 9221b6924bSBob Peterson static int gfs2_write_jdata_page(struct page *page, 93fd4c5748SBenjamin Marzinski struct writeback_control *wbc) 94fd4c5748SBenjamin Marzinski { 95fd4c5748SBenjamin Marzinski struct inode * const inode = page->mapping->host; 96fd4c5748SBenjamin Marzinski loff_t i_size = i_size_read(inode); 97fd4c5748SBenjamin Marzinski const pgoff_t end_index = i_size >> PAGE_SHIFT; 98fd4c5748SBenjamin Marzinski unsigned offset; 99fd4c5748SBenjamin Marzinski 100fd4c5748SBenjamin Marzinski /* 101fd4c5748SBenjamin Marzinski * The page straddles i_size. It must be zeroed out on each and every 102fd4c5748SBenjamin Marzinski * writepage invocation because it may be mmapped. "A file is mapped 103fd4c5748SBenjamin Marzinski * in multiples of the page size. For a file that is not a multiple of 104fd4c5748SBenjamin Marzinski * the page size, the remaining memory is zeroed when mapped, and 105fd4c5748SBenjamin Marzinski * writes to that region are not written out to the file." 106fd4c5748SBenjamin Marzinski */ 107fd4c5748SBenjamin Marzinski offset = i_size & (PAGE_SIZE - 1); 108fd4c5748SBenjamin Marzinski if (page->index == end_index && offset) 109fd4c5748SBenjamin Marzinski zero_user_segment(page, offset, PAGE_SIZE); 110fd4c5748SBenjamin Marzinski 11121b6924bSBob Peterson return __block_write_full_page(inode, page, gfs2_get_block_noalloc, wbc, 112fd4c5748SBenjamin Marzinski end_buffer_async_write); 113fd4c5748SBenjamin Marzinski } 114fd4c5748SBenjamin Marzinski 115b1e71b06SSteven Whitehouse /** 116b1e71b06SSteven Whitehouse * __gfs2_jdata_writepage - The core of jdata writepage 117b1e71b06SSteven Whitehouse * @page: The page to write 118b1e71b06SSteven Whitehouse * @wbc: The writeback control 119b1e71b06SSteven Whitehouse * 120b1e71b06SSteven Whitehouse * This is shared between writepage and writepages and implements the 121b1e71b06SSteven Whitehouse * core of the writepage operation. If a transaction is required then 122b1e71b06SSteven Whitehouse * PageChecked will have been set and the transaction will have 123b1e71b06SSteven Whitehouse * already been started before this is called. 124b1e71b06SSteven Whitehouse */ 125b1e71b06SSteven Whitehouse 126b1e71b06SSteven Whitehouse static int __gfs2_jdata_writepage(struct page *page, struct writeback_control *wbc) 127b1e71b06SSteven Whitehouse { 128b1e71b06SSteven Whitehouse struct inode *inode = page->mapping->host; 129b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 130b1e71b06SSteven Whitehouse 131b1e71b06SSteven Whitehouse if (PageChecked(page)) { 132b1e71b06SSteven Whitehouse ClearPageChecked(page); 133b1e71b06SSteven Whitehouse if (!page_has_buffers(page)) { 134b1e71b06SSteven Whitehouse create_empty_buffers(page, inode->i_sb->s_blocksize, 13547a9a527SFabian Frederick BIT(BH_Dirty)|BIT(BH_Uptodate)); 136b1e71b06SSteven Whitehouse } 137c1b0c3cfSAndreas Gruenbacher gfs2_trans_add_databufs(ip, page_folio(page), 0, PAGE_SIZE); 138b1e71b06SSteven Whitehouse } 13921b6924bSBob Peterson return gfs2_write_jdata_page(page, wbc); 140b1e71b06SSteven Whitehouse } 141b1e71b06SSteven Whitehouse 142b1e71b06SSteven Whitehouse /** 143b1e71b06SSteven Whitehouse * gfs2_jdata_writepage - Write complete page 144b1e71b06SSteven Whitehouse * @page: Page to write 1451272574bSFabian Frederick * @wbc: The writeback control 146b1e71b06SSteven Whitehouse * 147b1e71b06SSteven Whitehouse * Returns: errno 148b1e71b06SSteven Whitehouse * 149b1e71b06SSteven Whitehouse */ 150b1e71b06SSteven Whitehouse 151b1e71b06SSteven Whitehouse static int gfs2_jdata_writepage(struct page *page, struct writeback_control *wbc) 152b1e71b06SSteven Whitehouse { 153b1e71b06SSteven Whitehouse struct inode *inode = page->mapping->host; 154fd4c5748SBenjamin Marzinski struct gfs2_inode *ip = GFS2_I(inode); 155b1e71b06SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 156b1e71b06SSteven Whitehouse 157fd4c5748SBenjamin Marzinski if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(ip->i_gl))) 158fd4c5748SBenjamin Marzinski goto out; 159fd4c5748SBenjamin Marzinski if (PageChecked(page) || current->journal_info) 160b1e71b06SSteven Whitehouse goto out_ignore; 161e556280dSBob Peterson return __gfs2_jdata_writepage(page, wbc); 162b1e71b06SSteven Whitehouse 163b1e71b06SSteven Whitehouse out_ignore: 164b1e71b06SSteven Whitehouse redirty_page_for_writepage(wbc, page); 165fd4c5748SBenjamin Marzinski out: 166b1e71b06SSteven Whitehouse unlock_page(page); 167b1e71b06SSteven Whitehouse return 0; 168b1e71b06SSteven Whitehouse } 169b1e71b06SSteven Whitehouse 170b1e71b06SSteven Whitehouse /** 17145138990SSteven Whitehouse * gfs2_writepages - Write a bunch of dirty pages back to disk 172b1e71b06SSteven Whitehouse * @mapping: The mapping to write 173b1e71b06SSteven Whitehouse * @wbc: Write-back control 174b1e71b06SSteven Whitehouse * 17545138990SSteven Whitehouse * Used for both ordered and writeback modes. 176b1e71b06SSteven Whitehouse */ 17745138990SSteven Whitehouse static int gfs2_writepages(struct address_space *mapping, 178b1e71b06SSteven Whitehouse struct writeback_control *wbc) 179b1e71b06SSteven Whitehouse { 180b066a4eeSAbhi Das struct gfs2_sbd *sdp = gfs2_mapping2sbd(mapping); 1812164f9b9SChristoph Hellwig struct iomap_writepage_ctx wpc = { }; 1822164f9b9SChristoph Hellwig int ret; 183b066a4eeSAbhi Das 184b066a4eeSAbhi Das /* 185b066a4eeSAbhi Das * Even if we didn't write any pages here, we might still be holding 186b066a4eeSAbhi Das * dirty pages in the ail. We forcibly flush the ail because we don't 187b066a4eeSAbhi Das * want balance_dirty_pages() to loop indefinitely trying to write out 188b066a4eeSAbhi Das * pages held in the ail that it can't find. 189b066a4eeSAbhi Das */ 1902164f9b9SChristoph Hellwig ret = iomap_writepages(mapping, wbc, &wpc, &gfs2_writeback_ops); 191b066a4eeSAbhi Das if (ret == 0) 192b066a4eeSAbhi Das set_bit(SDF_FORCE_AIL_FLUSH, &sdp->sd_flags); 193b066a4eeSAbhi Das return ret; 194b1e71b06SSteven Whitehouse } 195b1e71b06SSteven Whitehouse 196b1e71b06SSteven Whitehouse /** 19787ed37e6SVishal Moola (Oracle) * gfs2_write_jdata_batch - Write back a folio batch's worth of folios 198b1e71b06SSteven Whitehouse * @mapping: The mapping 199b1e71b06SSteven Whitehouse * @wbc: The writeback control 20087ed37e6SVishal Moola (Oracle) * @fbatch: The batch of folios 2011272574bSFabian Frederick * @done_index: Page index 202b1e71b06SSteven Whitehouse * 203b1e71b06SSteven Whitehouse * Returns: non-zero if loop should terminate, zero otherwise 204b1e71b06SSteven Whitehouse */ 205b1e71b06SSteven Whitehouse 20687ed37e6SVishal Moola (Oracle) static int gfs2_write_jdata_batch(struct address_space *mapping, 207b1e71b06SSteven Whitehouse struct writeback_control *wbc, 20887ed37e6SVishal Moola (Oracle) struct folio_batch *fbatch, 209774016b2SSteven Whitehouse pgoff_t *done_index) 210b1e71b06SSteven Whitehouse { 211b1e71b06SSteven Whitehouse struct inode *inode = mapping->host; 212b1e71b06SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 21387ed37e6SVishal Moola (Oracle) unsigned nrblocks; 214b1e71b06SSteven Whitehouse int i; 215b1e71b06SSteven Whitehouse int ret; 21687ed37e6SVishal Moola (Oracle) int nr_pages = 0; 21787ed37e6SVishal Moola (Oracle) int nr_folios = folio_batch_count(fbatch); 21887ed37e6SVishal Moola (Oracle) 21987ed37e6SVishal Moola (Oracle) for (i = 0; i < nr_folios; i++) 22087ed37e6SVishal Moola (Oracle) nr_pages += folio_nr_pages(fbatch->folios[i]); 22187ed37e6SVishal Moola (Oracle) nrblocks = nr_pages * (PAGE_SIZE >> inode->i_blkbits); 222b1e71b06SSteven Whitehouse 223b1e71b06SSteven Whitehouse ret = gfs2_trans_begin(sdp, nrblocks, nrblocks); 224b1e71b06SSteven Whitehouse if (ret < 0) 225b1e71b06SSteven Whitehouse return ret; 226b1e71b06SSteven Whitehouse 22787ed37e6SVishal Moola (Oracle) for (i = 0; i < nr_folios; i++) { 22887ed37e6SVishal Moola (Oracle) struct folio *folio = fbatch->folios[i]; 229b1e71b06SSteven Whitehouse 23087ed37e6SVishal Moola (Oracle) *done_index = folio->index; 231774016b2SSteven Whitehouse 23287ed37e6SVishal Moola (Oracle) folio_lock(folio); 233b1e71b06SSteven Whitehouse 23487ed37e6SVishal Moola (Oracle) if (unlikely(folio->mapping != mapping)) { 235774016b2SSteven Whitehouse continue_unlock: 23687ed37e6SVishal Moola (Oracle) folio_unlock(folio); 237b1e71b06SSteven Whitehouse continue; 238b1e71b06SSteven Whitehouse } 239b1e71b06SSteven Whitehouse 24087ed37e6SVishal Moola (Oracle) if (!folio_test_dirty(folio)) { 241774016b2SSteven Whitehouse /* someone wrote it for us */ 242774016b2SSteven Whitehouse goto continue_unlock; 243b1e71b06SSteven Whitehouse } 244b1e71b06SSteven Whitehouse 24587ed37e6SVishal Moola (Oracle) if (folio_test_writeback(folio)) { 246b1e71b06SSteven Whitehouse if (wbc->sync_mode != WB_SYNC_NONE) 24787ed37e6SVishal Moola (Oracle) folio_wait_writeback(folio); 248774016b2SSteven Whitehouse else 249774016b2SSteven Whitehouse goto continue_unlock; 250b1e71b06SSteven Whitehouse } 251b1e71b06SSteven Whitehouse 25287ed37e6SVishal Moola (Oracle) BUG_ON(folio_test_writeback(folio)); 25387ed37e6SVishal Moola (Oracle) if (!folio_clear_dirty_for_io(folio)) 254774016b2SSteven Whitehouse goto continue_unlock; 255774016b2SSteven Whitehouse 256de1414a6SChristoph Hellwig trace_wbc_writepage(wbc, inode_to_bdi(inode)); 257b1e71b06SSteven Whitehouse 25887ed37e6SVishal Moola (Oracle) ret = __gfs2_jdata_writepage(&folio->page, wbc); 259774016b2SSteven Whitehouse if (unlikely(ret)) { 260774016b2SSteven Whitehouse if (ret == AOP_WRITEPAGE_ACTIVATE) { 26187ed37e6SVishal Moola (Oracle) folio_unlock(folio); 262774016b2SSteven Whitehouse ret = 0; 263774016b2SSteven Whitehouse } else { 264b1e71b06SSteven Whitehouse 265774016b2SSteven Whitehouse /* 266774016b2SSteven Whitehouse * done_index is set past this page, 267774016b2SSteven Whitehouse * so media errors will not choke 268774016b2SSteven Whitehouse * background writeout for the entire 269774016b2SSteven Whitehouse * file. This has consequences for 270774016b2SSteven Whitehouse * range_cyclic semantics (ie. it may 271774016b2SSteven Whitehouse * not be suitable for data integrity 272774016b2SSteven Whitehouse * writeout). 273774016b2SSteven Whitehouse */ 27487ed37e6SVishal Moola (Oracle) *done_index = folio->index + 27587ed37e6SVishal Moola (Oracle) folio_nr_pages(folio); 276b1e71b06SSteven Whitehouse ret = 1; 277774016b2SSteven Whitehouse break; 278774016b2SSteven Whitehouse } 279774016b2SSteven Whitehouse } 280774016b2SSteven Whitehouse 281774016b2SSteven Whitehouse /* 282774016b2SSteven Whitehouse * We stop writing back only if we are not doing 283774016b2SSteven Whitehouse * integrity sync. In case of integrity sync we have to 284774016b2SSteven Whitehouse * keep going until we have written all the pages 285774016b2SSteven Whitehouse * we tagged for writeback prior to entering this loop. 286774016b2SSteven Whitehouse */ 287774016b2SSteven Whitehouse if (--wbc->nr_to_write <= 0 && wbc->sync_mode == WB_SYNC_NONE) { 288774016b2SSteven Whitehouse ret = 1; 289774016b2SSteven Whitehouse break; 290774016b2SSteven Whitehouse } 291774016b2SSteven Whitehouse 292b1e71b06SSteven Whitehouse } 293b1e71b06SSteven Whitehouse gfs2_trans_end(sdp); 294b1e71b06SSteven Whitehouse return ret; 295b1e71b06SSteven Whitehouse } 296b1e71b06SSteven Whitehouse 297b1e71b06SSteven Whitehouse /** 298b1e71b06SSteven Whitehouse * gfs2_write_cache_jdata - Like write_cache_pages but different 299b1e71b06SSteven Whitehouse * @mapping: The mapping to write 300b1e71b06SSteven Whitehouse * @wbc: The writeback control 301b1e71b06SSteven Whitehouse * 302b1e71b06SSteven Whitehouse * The reason that we use our own function here is that we need to 303b1e71b06SSteven Whitehouse * start transactions before we grab page locks. This allows us 304b1e71b06SSteven Whitehouse * to get the ordering right. 305b1e71b06SSteven Whitehouse */ 306b1e71b06SSteven Whitehouse 307b1e71b06SSteven Whitehouse static int gfs2_write_cache_jdata(struct address_space *mapping, 308b1e71b06SSteven Whitehouse struct writeback_control *wbc) 309b1e71b06SSteven Whitehouse { 310b1e71b06SSteven Whitehouse int ret = 0; 311b1e71b06SSteven Whitehouse int done = 0; 31287ed37e6SVishal Moola (Oracle) struct folio_batch fbatch; 31387ed37e6SVishal Moola (Oracle) int nr_folios; 3143f649ab7SKees Cook pgoff_t writeback_index; 315b1e71b06SSteven Whitehouse pgoff_t index; 316b1e71b06SSteven Whitehouse pgoff_t end; 317774016b2SSteven Whitehouse pgoff_t done_index; 318774016b2SSteven Whitehouse int cycled; 319b1e71b06SSteven Whitehouse int range_whole = 0; 32010bbd235SMatthew Wilcox xa_mark_t tag; 321b1e71b06SSteven Whitehouse 32287ed37e6SVishal Moola (Oracle) folio_batch_init(&fbatch); 323b1e71b06SSteven Whitehouse if (wbc->range_cyclic) { 324774016b2SSteven Whitehouse writeback_index = mapping->writeback_index; /* prev offset */ 325774016b2SSteven Whitehouse index = writeback_index; 326774016b2SSteven Whitehouse if (index == 0) 327774016b2SSteven Whitehouse cycled = 1; 328774016b2SSteven Whitehouse else 329774016b2SSteven Whitehouse cycled = 0; 330b1e71b06SSteven Whitehouse end = -1; 331b1e71b06SSteven Whitehouse } else { 33209cbfeafSKirill A. Shutemov index = wbc->range_start >> PAGE_SHIFT; 33309cbfeafSKirill A. Shutemov end = wbc->range_end >> PAGE_SHIFT; 334b1e71b06SSteven Whitehouse if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) 335b1e71b06SSteven Whitehouse range_whole = 1; 336774016b2SSteven Whitehouse cycled = 1; /* ignore range_cyclic tests */ 337b1e71b06SSteven Whitehouse } 338774016b2SSteven Whitehouse if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) 339774016b2SSteven Whitehouse tag = PAGECACHE_TAG_TOWRITE; 340774016b2SSteven Whitehouse else 341774016b2SSteven Whitehouse tag = PAGECACHE_TAG_DIRTY; 342b1e71b06SSteven Whitehouse 343b1e71b06SSteven Whitehouse retry: 344774016b2SSteven Whitehouse if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) 345774016b2SSteven Whitehouse tag_pages_for_writeback(mapping, index, end); 346774016b2SSteven Whitehouse done_index = index; 347774016b2SSteven Whitehouse while (!done && (index <= end)) { 34887ed37e6SVishal Moola (Oracle) nr_folios = filemap_get_folios_tag(mapping, &index, end, 34987ed37e6SVishal Moola (Oracle) tag, &fbatch); 35087ed37e6SVishal Moola (Oracle) if (nr_folios == 0) 351774016b2SSteven Whitehouse break; 352774016b2SSteven Whitehouse 35387ed37e6SVishal Moola (Oracle) ret = gfs2_write_jdata_batch(mapping, wbc, &fbatch, 35487ed37e6SVishal Moola (Oracle) &done_index); 355b1e71b06SSteven Whitehouse if (ret) 356b1e71b06SSteven Whitehouse done = 1; 357b1e71b06SSteven Whitehouse if (ret > 0) 358b1e71b06SSteven Whitehouse ret = 0; 35987ed37e6SVishal Moola (Oracle) folio_batch_release(&fbatch); 360b1e71b06SSteven Whitehouse cond_resched(); 361b1e71b06SSteven Whitehouse } 362b1e71b06SSteven Whitehouse 363774016b2SSteven Whitehouse if (!cycled && !done) { 364b1e71b06SSteven Whitehouse /* 365774016b2SSteven Whitehouse * range_cyclic: 366b1e71b06SSteven Whitehouse * We hit the last page and there is more work to be done: wrap 367b1e71b06SSteven Whitehouse * back to the start of the file 368b1e71b06SSteven Whitehouse */ 369774016b2SSteven Whitehouse cycled = 1; 370b1e71b06SSteven Whitehouse index = 0; 371774016b2SSteven Whitehouse end = writeback_index - 1; 372b1e71b06SSteven Whitehouse goto retry; 373b1e71b06SSteven Whitehouse } 374b1e71b06SSteven Whitehouse 375b1e71b06SSteven Whitehouse if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) 376774016b2SSteven Whitehouse mapping->writeback_index = done_index; 377774016b2SSteven Whitehouse 378b1e71b06SSteven Whitehouse return ret; 379b1e71b06SSteven Whitehouse } 380b1e71b06SSteven Whitehouse 381b1e71b06SSteven Whitehouse 382b1e71b06SSteven Whitehouse /** 383b1e71b06SSteven Whitehouse * gfs2_jdata_writepages - Write a bunch of dirty pages back to disk 384b1e71b06SSteven Whitehouse * @mapping: The mapping to write 385b1e71b06SSteven Whitehouse * @wbc: The writeback control 386b1e71b06SSteven Whitehouse * 387b1e71b06SSteven Whitehouse */ 388b1e71b06SSteven Whitehouse 389b1e71b06SSteven Whitehouse static int gfs2_jdata_writepages(struct address_space *mapping, 390b1e71b06SSteven Whitehouse struct writeback_control *wbc) 391b1e71b06SSteven Whitehouse { 392b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(mapping->host); 393b1e71b06SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(mapping->host); 394b1e71b06SSteven Whitehouse int ret; 395b1e71b06SSteven Whitehouse 396b1e71b06SSteven Whitehouse ret = gfs2_write_cache_jdata(mapping, wbc); 397b1e71b06SSteven Whitehouse if (ret == 0 && wbc->sync_mode == WB_SYNC_ALL) { 398805c0907SBob Peterson gfs2_log_flush(sdp, ip->i_gl, GFS2_LOG_HEAD_FLUSH_NORMAL | 399805c0907SBob Peterson GFS2_LFC_JDATA_WPAGES); 400b1e71b06SSteven Whitehouse ret = gfs2_write_cache_jdata(mapping, wbc); 401b1e71b06SSteven Whitehouse } 402b1e71b06SSteven Whitehouse return ret; 403b1e71b06SSteven Whitehouse } 404b1e71b06SSteven Whitehouse 405b1e71b06SSteven Whitehouse /** 406b1e71b06SSteven Whitehouse * stuffed_readpage - Fill in a Linux page with stuffed file data 407b1e71b06SSteven Whitehouse * @ip: the inode 408b1e71b06SSteven Whitehouse * @page: the page 409b1e71b06SSteven Whitehouse * 410b1e71b06SSteven Whitehouse * Returns: errno 411b1e71b06SSteven Whitehouse */ 412378b6cbfSChristoph Hellwig static int stuffed_readpage(struct gfs2_inode *ip, struct page *page) 413b1e71b06SSteven Whitehouse { 414b1e71b06SSteven Whitehouse struct buffer_head *dibh; 415602c89d2SSteven Whitehouse u64 dsize = i_size_read(&ip->i_inode); 416b1e71b06SSteven Whitehouse void *kaddr; 417b1e71b06SSteven Whitehouse int error; 418b1e71b06SSteven Whitehouse 419b1e71b06SSteven Whitehouse /* 420b1e71b06SSteven Whitehouse * Due to the order of unstuffing files and ->fault(), we can be 421b1e71b06SSteven Whitehouse * asked for a zero page in the case of a stuffed file being extended, 422b1e71b06SSteven Whitehouse * so we need to supply one here. It doesn't happen often. 423b1e71b06SSteven Whitehouse */ 424b1e71b06SSteven Whitehouse if (unlikely(page->index)) { 42509cbfeafSKirill A. Shutemov zero_user(page, 0, PAGE_SIZE); 426b1e71b06SSteven Whitehouse SetPageUptodate(page); 427b1e71b06SSteven Whitehouse return 0; 428b1e71b06SSteven Whitehouse } 429b1e71b06SSteven Whitehouse 430b1e71b06SSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 431b1e71b06SSteven Whitehouse if (error) 432b1e71b06SSteven Whitehouse return error; 433b1e71b06SSteven Whitehouse 434d9349285SCong Wang kaddr = kmap_atomic(page); 435602c89d2SSteven Whitehouse memcpy(kaddr, dibh->b_data + sizeof(struct gfs2_dinode), dsize); 43609cbfeafSKirill A. Shutemov memset(kaddr + dsize, 0, PAGE_SIZE - dsize); 437d9349285SCong Wang kunmap_atomic(kaddr); 438b1e71b06SSteven Whitehouse flush_dcache_page(page); 439b1e71b06SSteven Whitehouse brelse(dibh); 440b1e71b06SSteven Whitehouse SetPageUptodate(page); 441b1e71b06SSteven Whitehouse 442b1e71b06SSteven Whitehouse return 0; 443b1e71b06SSteven Whitehouse } 444b1e71b06SSteven Whitehouse 445e9b5b23eSMatthew Wilcox (Oracle) /** 446e9b5b23eSMatthew Wilcox (Oracle) * gfs2_read_folio - read a folio from a file 447e9b5b23eSMatthew Wilcox (Oracle) * @file: The file to read 448e9b5b23eSMatthew Wilcox (Oracle) * @folio: The folio in the file 449e9b5b23eSMatthew Wilcox (Oracle) */ 450e9b5b23eSMatthew Wilcox (Oracle) static int gfs2_read_folio(struct file *file, struct folio *folio) 451b1e71b06SSteven Whitehouse { 452e9b5b23eSMatthew Wilcox (Oracle) struct inode *inode = folio->mapping->host; 4532164f9b9SChristoph Hellwig struct gfs2_inode *ip = GFS2_I(inode); 4542164f9b9SChristoph Hellwig struct gfs2_sbd *sdp = GFS2_SB(inode); 455b1e71b06SSteven Whitehouse int error; 456b1e71b06SSteven Whitehouse 4572164f9b9SChristoph Hellwig if (!gfs2_is_jdata(ip) || 458e9b5b23eSMatthew Wilcox (Oracle) (i_blocksize(inode) == PAGE_SIZE && !folio_buffers(folio))) { 4597479c505SMatthew Wilcox (Oracle) error = iomap_read_folio(folio, &gfs2_iomap_ops); 460f95cbb44SAndreas Gruenbacher } else if (gfs2_is_stuffed(ip)) { 461e9b5b23eSMatthew Wilcox (Oracle) error = stuffed_readpage(ip, &folio->page); 462e9b5b23eSMatthew Wilcox (Oracle) folio_unlock(folio); 463b1e71b06SSteven Whitehouse } else { 464f132ab7dSMatthew Wilcox (Oracle) error = mpage_read_folio(folio, gfs2_block_map); 465b1e71b06SSteven Whitehouse } 466b1e71b06SSteven Whitehouse 467eb43e660SBob Peterson if (unlikely(gfs2_withdrawn(sdp))) 468b1e71b06SSteven Whitehouse return -EIO; 469b1e71b06SSteven Whitehouse 470b1e71b06SSteven Whitehouse return error; 471b1e71b06SSteven Whitehouse } 472b1e71b06SSteven Whitehouse 473b1e71b06SSteven Whitehouse /** 474b1e71b06SSteven Whitehouse * gfs2_internal_read - read an internal file 475b1e71b06SSteven Whitehouse * @ip: The gfs2 inode 476b1e71b06SSteven Whitehouse * @buf: The buffer to fill 477b1e71b06SSteven Whitehouse * @pos: The file position 478b1e71b06SSteven Whitehouse * @size: The amount to read 479b1e71b06SSteven Whitehouse * 480b1e71b06SSteven Whitehouse */ 481b1e71b06SSteven Whitehouse 4824306629eSAndrew Price int gfs2_internal_read(struct gfs2_inode *ip, char *buf, loff_t *pos, 4834306629eSAndrew Price unsigned size) 484b1e71b06SSteven Whitehouse { 485b1e71b06SSteven Whitehouse struct address_space *mapping = ip->i_inode.i_mapping; 48645eb0504SAndreas Gruenbacher unsigned long index = *pos >> PAGE_SHIFT; 48709cbfeafSKirill A. Shutemov unsigned offset = *pos & (PAGE_SIZE - 1); 488b1e71b06SSteven Whitehouse unsigned copied = 0; 489b1e71b06SSteven Whitehouse unsigned amt; 490b1e71b06SSteven Whitehouse struct page *page; 491b1e71b06SSteven Whitehouse void *p; 492b1e71b06SSteven Whitehouse 493b1e71b06SSteven Whitehouse do { 494*cea44032SAndreas Gruenbacher page = read_cache_page(mapping, index, gfs2_read_folio, NULL); 495*cea44032SAndreas Gruenbacher if (IS_ERR(page)) { 496*cea44032SAndreas Gruenbacher if (PTR_ERR(page) == -EINTR) 497*cea44032SAndreas Gruenbacher continue; 498*cea44032SAndreas Gruenbacher return PTR_ERR(page); 499*cea44032SAndreas Gruenbacher } 500*cea44032SAndreas Gruenbacher p = kmap_atomic(page); 501b1e71b06SSteven Whitehouse amt = size - copied; 50209cbfeafSKirill A. Shutemov if (offset + size > PAGE_SIZE) 50309cbfeafSKirill A. Shutemov amt = PAGE_SIZE - offset; 504b1e71b06SSteven Whitehouse memcpy(buf + copied, p + offset, amt); 505d9349285SCong Wang kunmap_atomic(p); 50609cbfeafSKirill A. Shutemov put_page(page); 507b1e71b06SSteven Whitehouse copied += amt; 508b1e71b06SSteven Whitehouse index++; 509b1e71b06SSteven Whitehouse offset = 0; 510b1e71b06SSteven Whitehouse } while(copied < size); 511b1e71b06SSteven Whitehouse (*pos) += size; 512b1e71b06SSteven Whitehouse return size; 513b1e71b06SSteven Whitehouse } 514b1e71b06SSteven Whitehouse 515b1e71b06SSteven Whitehouse /** 516d4388340SMatthew Wilcox (Oracle) * gfs2_readahead - Read a bunch of pages at once 517c551f66cSLee Jones * @rac: Read-ahead control structure 518b1e71b06SSteven Whitehouse * 519b1e71b06SSteven Whitehouse * Some notes: 520b1e71b06SSteven Whitehouse * 1. This is only for readahead, so we can simply ignore any things 521b1e71b06SSteven Whitehouse * which are slightly inconvenient (such as locking conflicts between 522b1e71b06SSteven Whitehouse * the page lock and the glock) and return having done no I/O. Its 523b1e71b06SSteven Whitehouse * obviously not something we'd want to do on too regular a basis. 524b1e71b06SSteven Whitehouse * Any I/O we ignore at this time will be done via readpage later. 525b1e71b06SSteven Whitehouse * 2. We don't handle stuffed files here we let readpage do the honours. 526d4388340SMatthew Wilcox (Oracle) * 3. mpage_readahead() does most of the heavy lifting in the common case. 527b1e71b06SSteven Whitehouse * 4. gfs2_block_map() is relied upon to set BH_Boundary in the right places. 528b1e71b06SSteven Whitehouse */ 529b1e71b06SSteven Whitehouse 530d4388340SMatthew Wilcox (Oracle) static void gfs2_readahead(struct readahead_control *rac) 531b1e71b06SSteven Whitehouse { 532d4388340SMatthew Wilcox (Oracle) struct inode *inode = rac->mapping->host; 533b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 534b1e71b06SSteven Whitehouse 5352164f9b9SChristoph Hellwig if (gfs2_is_stuffed(ip)) 5362164f9b9SChristoph Hellwig ; 5372164f9b9SChristoph Hellwig else if (gfs2_is_jdata(ip)) 538d4388340SMatthew Wilcox (Oracle) mpage_readahead(rac, gfs2_block_map); 5392164f9b9SChristoph Hellwig else 5402164f9b9SChristoph Hellwig iomap_readahead(rac, &gfs2_iomap_ops); 541b1e71b06SSteven Whitehouse } 542b1e71b06SSteven Whitehouse 543b1e71b06SSteven Whitehouse /** 544b1e71b06SSteven Whitehouse * adjust_fs_space - Adjusts the free space available due to gfs2_grow 545b1e71b06SSteven Whitehouse * @inode: the rindex inode 546b1e71b06SSteven Whitehouse */ 54764bc06bbSAndreas Gruenbacher void adjust_fs_space(struct inode *inode) 548b1e71b06SSteven Whitehouse { 549d0a22a4bSAndreas Gruenbacher struct gfs2_sbd *sdp = GFS2_SB(inode); 5501946f70aSBenjamin Marzinski struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 551b1e71b06SSteven Whitehouse struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 552b1e71b06SSteven Whitehouse struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 55370c11ba8SBob Peterson struct buffer_head *m_bh; 554b1e71b06SSteven Whitehouse u64 fs_total, new_free; 555b1e71b06SSteven Whitehouse 556d0a22a4bSAndreas Gruenbacher if (gfs2_trans_begin(sdp, 2 * RES_STATFS, 0) != 0) 557d0a22a4bSAndreas Gruenbacher return; 558d0a22a4bSAndreas Gruenbacher 559b1e71b06SSteven Whitehouse /* Total up the file system space, according to the latest rindex. */ 560b1e71b06SSteven Whitehouse fs_total = gfs2_ri_total(sdp); 5611946f70aSBenjamin Marzinski if (gfs2_meta_inode_buffer(m_ip, &m_bh) != 0) 562d0a22a4bSAndreas Gruenbacher goto out; 563b1e71b06SSteven Whitehouse 564b1e71b06SSteven Whitehouse spin_lock(&sdp->sd_statfs_spin); 5651946f70aSBenjamin Marzinski gfs2_statfs_change_in(m_sc, m_bh->b_data + 5661946f70aSBenjamin Marzinski sizeof(struct gfs2_dinode)); 567b1e71b06SSteven Whitehouse if (fs_total > (m_sc->sc_total + l_sc->sc_total)) 568b1e71b06SSteven Whitehouse new_free = fs_total - (m_sc->sc_total + l_sc->sc_total); 569b1e71b06SSteven Whitehouse else 570b1e71b06SSteven Whitehouse new_free = 0; 571b1e71b06SSteven Whitehouse spin_unlock(&sdp->sd_statfs_spin); 572b1e71b06SSteven Whitehouse fs_warn(sdp, "File system extended by %llu blocks.\n", 573b1e71b06SSteven Whitehouse (unsigned long long)new_free); 574b1e71b06SSteven Whitehouse gfs2_statfs_change(sdp, new_free, new_free, 0); 5751946f70aSBenjamin Marzinski 57670c11ba8SBob Peterson update_statfs(sdp, m_bh); 5771946f70aSBenjamin Marzinski brelse(m_bh); 578d0a22a4bSAndreas Gruenbacher out: 579d0a22a4bSAndreas Gruenbacher sdp->sd_rindex_uptodate = 0; 580d0a22a4bSAndreas Gruenbacher gfs2_trans_end(sdp); 581b1e71b06SSteven Whitehouse } 582b1e71b06SSteven Whitehouse 583e621900aSMatthew Wilcox (Oracle) static bool jdata_dirty_folio(struct address_space *mapping, 584e621900aSMatthew Wilcox (Oracle) struct folio *folio) 585b1e71b06SSteven Whitehouse { 5866302d6f4SBob Peterson if (current->journal_info) 587e621900aSMatthew Wilcox (Oracle) folio_set_checked(folio); 588e621900aSMatthew Wilcox (Oracle) return block_dirty_folio(mapping, folio); 589b1e71b06SSteven Whitehouse } 590b1e71b06SSteven Whitehouse 591b1e71b06SSteven Whitehouse /** 592b1e71b06SSteven Whitehouse * gfs2_bmap - Block map function 593b1e71b06SSteven Whitehouse * @mapping: Address space info 594b1e71b06SSteven Whitehouse * @lblock: The block to map 595b1e71b06SSteven Whitehouse * 596b1e71b06SSteven Whitehouse * Returns: The disk address for the block or 0 on hole or error 597b1e71b06SSteven Whitehouse */ 598b1e71b06SSteven Whitehouse 599b1e71b06SSteven Whitehouse static sector_t gfs2_bmap(struct address_space *mapping, sector_t lblock) 600b1e71b06SSteven Whitehouse { 601b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(mapping->host); 602b1e71b06SSteven Whitehouse struct gfs2_holder i_gh; 603b1e71b06SSteven Whitehouse sector_t dblock = 0; 604b1e71b06SSteven Whitehouse int error; 605b1e71b06SSteven Whitehouse 606b1e71b06SSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 607b1e71b06SSteven Whitehouse if (error) 608b1e71b06SSteven Whitehouse return 0; 609b1e71b06SSteven Whitehouse 610b1e71b06SSteven Whitehouse if (!gfs2_is_stuffed(ip)) 6117770c93aSChristoph Hellwig dblock = iomap_bmap(mapping, lblock, &gfs2_iomap_ops); 612b1e71b06SSteven Whitehouse 613b1e71b06SSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 614b1e71b06SSteven Whitehouse 615b1e71b06SSteven Whitehouse return dblock; 616b1e71b06SSteven Whitehouse } 617b1e71b06SSteven Whitehouse 618b1e71b06SSteven Whitehouse static void gfs2_discard(struct gfs2_sbd *sdp, struct buffer_head *bh) 619b1e71b06SSteven Whitehouse { 620b1e71b06SSteven Whitehouse struct gfs2_bufdata *bd; 621b1e71b06SSteven Whitehouse 622b1e71b06SSteven Whitehouse lock_buffer(bh); 623b1e71b06SSteven Whitehouse gfs2_log_lock(sdp); 624b1e71b06SSteven Whitehouse clear_buffer_dirty(bh); 625b1e71b06SSteven Whitehouse bd = bh->b_private; 626b1e71b06SSteven Whitehouse if (bd) { 627c0752aa7SBob Peterson if (!list_empty(&bd->bd_list) && !buffer_pinned(bh)) 628c0752aa7SBob Peterson list_del_init(&bd->bd_list); 62968942870SBob Peterson else { 63068942870SBob Peterson spin_lock(&sdp->sd_ail_lock); 63168cd4ce2SBob Peterson gfs2_remove_from_journal(bh, REMOVE_JDATA); 63268942870SBob Peterson spin_unlock(&sdp->sd_ail_lock); 63368942870SBob Peterson } 634b1e71b06SSteven Whitehouse } 635b1e71b06SSteven Whitehouse bh->b_bdev = NULL; 636b1e71b06SSteven Whitehouse clear_buffer_mapped(bh); 637b1e71b06SSteven Whitehouse clear_buffer_req(bh); 638b1e71b06SSteven Whitehouse clear_buffer_new(bh); 639b1e71b06SSteven Whitehouse gfs2_log_unlock(sdp); 640b1e71b06SSteven Whitehouse unlock_buffer(bh); 641b1e71b06SSteven Whitehouse } 642b1e71b06SSteven Whitehouse 6435f4b2976SMatthew Wilcox (Oracle) static void gfs2_invalidate_folio(struct folio *folio, size_t offset, 6445f4b2976SMatthew Wilcox (Oracle) size_t length) 645b1e71b06SSteven Whitehouse { 6465f4b2976SMatthew Wilcox (Oracle) struct gfs2_sbd *sdp = GFS2_SB(folio->mapping->host); 6475f4b2976SMatthew Wilcox (Oracle) size_t stop = offset + length; 6485f4b2976SMatthew Wilcox (Oracle) int partial_page = (offset || length < folio_size(folio)); 649b1e71b06SSteven Whitehouse struct buffer_head *bh, *head; 650b1e71b06SSteven Whitehouse unsigned long pos = 0; 651b1e71b06SSteven Whitehouse 6525f4b2976SMatthew Wilcox (Oracle) BUG_ON(!folio_test_locked(folio)); 6535c0bb97cSLukas Czerner if (!partial_page) 6545f4b2976SMatthew Wilcox (Oracle) folio_clear_checked(folio); 6555f4b2976SMatthew Wilcox (Oracle) head = folio_buffers(folio); 6565f4b2976SMatthew Wilcox (Oracle) if (!head) 657b1e71b06SSteven Whitehouse goto out; 658b1e71b06SSteven Whitehouse 6595f4b2976SMatthew Wilcox (Oracle) bh = head; 660b1e71b06SSteven Whitehouse do { 6615c0bb97cSLukas Czerner if (pos + bh->b_size > stop) 6625c0bb97cSLukas Czerner return; 6635c0bb97cSLukas Czerner 664b1e71b06SSteven Whitehouse if (offset <= pos) 665b1e71b06SSteven Whitehouse gfs2_discard(sdp, bh); 666b1e71b06SSteven Whitehouse pos += bh->b_size; 667b1e71b06SSteven Whitehouse bh = bh->b_this_page; 668b1e71b06SSteven Whitehouse } while (bh != head); 669b1e71b06SSteven Whitehouse out: 6705c0bb97cSLukas Czerner if (!partial_page) 6715f4b2976SMatthew Wilcox (Oracle) filemap_release_folio(folio, 0); 672b1e71b06SSteven Whitehouse } 673b1e71b06SSteven Whitehouse 674b1e71b06SSteven Whitehouse /** 675e45c20d1SMatthew Wilcox (Oracle) * gfs2_release_folio - free the metadata associated with a folio 676e45c20d1SMatthew Wilcox (Oracle) * @folio: the folio that's being released 677b1e71b06SSteven Whitehouse * @gfp_mask: passed from Linux VFS, ignored by us 678b1e71b06SSteven Whitehouse * 679e45c20d1SMatthew Wilcox (Oracle) * Calls try_to_free_buffers() to free the buffers and put the folio if the 6800ebbe4f9SAndreas Gruenbacher * buffers can be released. 681b1e71b06SSteven Whitehouse * 682e45c20d1SMatthew Wilcox (Oracle) * Returns: true if the folio was put or else false 683b1e71b06SSteven Whitehouse */ 684b1e71b06SSteven Whitehouse 685e45c20d1SMatthew Wilcox (Oracle) bool gfs2_release_folio(struct folio *folio, gfp_t gfp_mask) 686b1e71b06SSteven Whitehouse { 687e45c20d1SMatthew Wilcox (Oracle) struct address_space *mapping = folio->mapping; 688009d8518SSteven Whitehouse struct gfs2_sbd *sdp = gfs2_mapping2sbd(mapping); 689b1e71b06SSteven Whitehouse struct buffer_head *bh, *head; 690b1e71b06SSteven Whitehouse struct gfs2_bufdata *bd; 691b1e71b06SSteven Whitehouse 692e45c20d1SMatthew Wilcox (Oracle) head = folio_buffers(folio); 693e45c20d1SMatthew Wilcox (Oracle) if (!head) 694e45c20d1SMatthew Wilcox (Oracle) return false; 695b1e71b06SSteven Whitehouse 6961c185c02SAndreas Gruenbacher /* 697e45c20d1SMatthew Wilcox (Oracle) * mm accommodates an old ext3 case where clean folios might 698e45c20d1SMatthew Wilcox (Oracle) * not have had the dirty bit cleared. Thus, it can send actual 699e45c20d1SMatthew Wilcox (Oracle) * dirty folios to ->release_folio() via shrink_active_list(). 7001c185c02SAndreas Gruenbacher * 701e45c20d1SMatthew Wilcox (Oracle) * As a workaround, we skip folios that contain dirty buffers 702e45c20d1SMatthew Wilcox (Oracle) * below. Once ->release_folio isn't called on dirty folios 703e45c20d1SMatthew Wilcox (Oracle) * anymore, we can warn on dirty buffers like we used to here 704e45c20d1SMatthew Wilcox (Oracle) * again. 7051c185c02SAndreas Gruenbacher */ 7061c185c02SAndreas Gruenbacher 707b1e71b06SSteven Whitehouse gfs2_log_lock(sdp); 708e45c20d1SMatthew Wilcox (Oracle) bh = head; 709b1e71b06SSteven Whitehouse do { 710b1e71b06SSteven Whitehouse if (atomic_read(&bh->b_count)) 711b1e71b06SSteven Whitehouse goto cannot_release; 712b1e71b06SSteven Whitehouse bd = bh->b_private; 71316ca9412SBenjamin Marzinski if (bd && bd->bd_tr) 714b1e71b06SSteven Whitehouse goto cannot_release; 7151c185c02SAndreas Gruenbacher if (buffer_dirty(bh) || WARN_ON(buffer_pinned(bh))) 7161c185c02SAndreas Gruenbacher goto cannot_release; 717b1e71b06SSteven Whitehouse bh = bh->b_this_page; 718b1e71b06SSteven Whitehouse } while (bh != head); 719b1e71b06SSteven Whitehouse 720e45c20d1SMatthew Wilcox (Oracle) bh = head; 721b1e71b06SSteven Whitehouse do { 722b1e71b06SSteven Whitehouse bd = bh->b_private; 723b1e71b06SSteven Whitehouse if (bd) { 724b1e71b06SSteven Whitehouse gfs2_assert_warn(sdp, bd->bd_bh == bh); 725b1e71b06SSteven Whitehouse bd->bd_bh = NULL; 726b1e71b06SSteven Whitehouse bh->b_private = NULL; 727019dd669SBob Peterson /* 728019dd669SBob Peterson * The bd may still be queued as a revoke, in which 729019dd669SBob Peterson * case we must not dequeue nor free it. 730019dd669SBob Peterson */ 731019dd669SBob Peterson if (!bd->bd_blkno && !list_empty(&bd->bd_list)) 732019dd669SBob Peterson list_del_init(&bd->bd_list); 733019dd669SBob Peterson if (list_empty(&bd->bd_list)) 734b1e71b06SSteven Whitehouse kmem_cache_free(gfs2_bufdata_cachep, bd); 735e4f29206SSteven Whitehouse } 736b1e71b06SSteven Whitehouse 737b1e71b06SSteven Whitehouse bh = bh->b_this_page; 738b1e71b06SSteven Whitehouse } while (bh != head); 739e4f29206SSteven Whitehouse gfs2_log_unlock(sdp); 740b1e71b06SSteven Whitehouse 74168189fefSMatthew Wilcox (Oracle) return try_to_free_buffers(folio); 7428f065d36SSteven Whitehouse 743b1e71b06SSteven Whitehouse cannot_release: 744b1e71b06SSteven Whitehouse gfs2_log_unlock(sdp); 745e45c20d1SMatthew Wilcox (Oracle) return false; 746b1e71b06SSteven Whitehouse } 747b1e71b06SSteven Whitehouse 748eadd7535SChristoph Hellwig static const struct address_space_operations gfs2_aops = { 74945138990SSteven Whitehouse .writepages = gfs2_writepages, 750f132ab7dSMatthew Wilcox (Oracle) .read_folio = gfs2_read_folio, 751d4388340SMatthew Wilcox (Oracle) .readahead = gfs2_readahead, 752187c82cbSMatthew Wilcox (Oracle) .dirty_folio = filemap_dirty_folio, 7538597447dSMatthew Wilcox (Oracle) .release_folio = iomap_release_folio, 754d82354f6SMatthew Wilcox (Oracle) .invalidate_folio = iomap_invalidate_folio, 755b1e71b06SSteven Whitehouse .bmap = gfs2_bmap, 7562ec810d5SMatthew Wilcox (Oracle) .migrate_folio = filemap_migrate_folio, 7572164f9b9SChristoph Hellwig .is_partially_uptodate = iomap_is_partially_uptodate, 758aa261f54SAndi Kleen .error_remove_page = generic_error_remove_page, 759b1e71b06SSteven Whitehouse }; 760b1e71b06SSteven Whitehouse 761b1e71b06SSteven Whitehouse static const struct address_space_operations gfs2_jdata_aops = { 762b1e71b06SSteven Whitehouse .writepage = gfs2_jdata_writepage, 763b1e71b06SSteven Whitehouse .writepages = gfs2_jdata_writepages, 764f132ab7dSMatthew Wilcox (Oracle) .read_folio = gfs2_read_folio, 765d4388340SMatthew Wilcox (Oracle) .readahead = gfs2_readahead, 766e621900aSMatthew Wilcox (Oracle) .dirty_folio = jdata_dirty_folio, 767b1e71b06SSteven Whitehouse .bmap = gfs2_bmap, 7685f4b2976SMatthew Wilcox (Oracle) .invalidate_folio = gfs2_invalidate_folio, 769e45c20d1SMatthew Wilcox (Oracle) .release_folio = gfs2_release_folio, 770b1e71b06SSteven Whitehouse .is_partially_uptodate = block_is_partially_uptodate, 771aa261f54SAndi Kleen .error_remove_page = generic_error_remove_page, 772b1e71b06SSteven Whitehouse }; 773b1e71b06SSteven Whitehouse 774b1e71b06SSteven Whitehouse void gfs2_set_aops(struct inode *inode) 775b1e71b06SSteven Whitehouse { 776eadd7535SChristoph Hellwig if (gfs2_is_jdata(GFS2_I(inode))) 777b1e71b06SSteven Whitehouse inode->i_mapping->a_ops = &gfs2_jdata_aops; 778b1e71b06SSteven Whitehouse else 779eadd7535SChristoph Hellwig inode->i_mapping->a_ops = &gfs2_aops; 780b1e71b06SSteven Whitehouse } 781