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 /** 85*c1401fd1SMatthew Wilcox (Oracle) * gfs2_write_jdata_folio - gfs2 jdata-specific version of block_write_full_page 86*c1401fd1SMatthew Wilcox (Oracle) * @folio: The folio 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 */ 92*c1401fd1SMatthew Wilcox (Oracle) static int gfs2_write_jdata_folio(struct folio *folio, 93fd4c5748SBenjamin Marzinski struct writeback_control *wbc) 94fd4c5748SBenjamin Marzinski { 95*c1401fd1SMatthew Wilcox (Oracle) struct inode * const inode = folio->mapping->host; 96fd4c5748SBenjamin Marzinski loff_t i_size = i_size_read(inode); 97fd4c5748SBenjamin Marzinski 98fd4c5748SBenjamin Marzinski /* 99*c1401fd1SMatthew Wilcox (Oracle) * The folio straddles i_size. It must be zeroed out on each and every 100fd4c5748SBenjamin Marzinski * writepage invocation because it may be mmapped. "A file is mapped 101fd4c5748SBenjamin Marzinski * in multiples of the page size. For a file that is not a multiple of 102fd4c5748SBenjamin Marzinski * the page size, the remaining memory is zeroed when mapped, and 103fd4c5748SBenjamin Marzinski * writes to that region are not written out to the file." 104fd4c5748SBenjamin Marzinski */ 105*c1401fd1SMatthew Wilcox (Oracle) if (folio_pos(folio) < i_size && 106*c1401fd1SMatthew Wilcox (Oracle) i_size < folio_pos(folio) + folio_size(folio)) 107*c1401fd1SMatthew Wilcox (Oracle) folio_zero_segment(folio, offset_in_folio(folio, i_size), 108*c1401fd1SMatthew Wilcox (Oracle) folio_size(folio)); 109fd4c5748SBenjamin Marzinski 110*c1401fd1SMatthew Wilcox (Oracle) return __block_write_full_page(inode, &folio->page, 111*c1401fd1SMatthew Wilcox (Oracle) gfs2_get_block_noalloc, wbc, 112fd4c5748SBenjamin Marzinski end_buffer_async_write); 113fd4c5748SBenjamin Marzinski } 114fd4c5748SBenjamin Marzinski 115b1e71b06SSteven Whitehouse /** 116d0cfcaeeSMatthew Wilcox (Oracle) * __gfs2_jdata_write_folio - The core of jdata writepage 117d0cfcaeeSMatthew Wilcox (Oracle) * @folio: The folio 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 122d0cfcaeeSMatthew Wilcox (Oracle) * the checked flag will have been set and the transaction will have 123b1e71b06SSteven Whitehouse * already been started before this is called. 124b1e71b06SSteven Whitehouse */ 125d0cfcaeeSMatthew Wilcox (Oracle) static int __gfs2_jdata_write_folio(struct folio *folio, 126d0cfcaeeSMatthew Wilcox (Oracle) struct writeback_control *wbc) 127b1e71b06SSteven Whitehouse { 128d0cfcaeeSMatthew Wilcox (Oracle) struct inode *inode = folio->mapping->host; 129b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 130b1e71b06SSteven Whitehouse 131d0cfcaeeSMatthew Wilcox (Oracle) if (folio_test_checked(folio)) { 132d0cfcaeeSMatthew Wilcox (Oracle) folio_clear_checked(folio); 133d0cfcaeeSMatthew Wilcox (Oracle) if (!folio_buffers(folio)) { 134d0cfcaeeSMatthew Wilcox (Oracle) folio_create_empty_buffers(folio, 135d0cfcaeeSMatthew Wilcox (Oracle) inode->i_sb->s_blocksize, 13647a9a527SFabian Frederick BIT(BH_Dirty)|BIT(BH_Uptodate)); 137b1e71b06SSteven Whitehouse } 138d0cfcaeeSMatthew Wilcox (Oracle) gfs2_trans_add_databufs(ip, folio, 0, folio_size(folio)); 139b1e71b06SSteven Whitehouse } 140*c1401fd1SMatthew Wilcox (Oracle) return gfs2_write_jdata_folio(folio, wbc); 141b1e71b06SSteven Whitehouse } 142b1e71b06SSteven Whitehouse 143b1e71b06SSteven Whitehouse /** 144b1e71b06SSteven Whitehouse * gfs2_jdata_writepage - Write complete page 145b1e71b06SSteven Whitehouse * @page: Page to write 1461272574bSFabian Frederick * @wbc: The writeback control 147b1e71b06SSteven Whitehouse * 148b1e71b06SSteven Whitehouse * Returns: errno 149b1e71b06SSteven Whitehouse * 150b1e71b06SSteven Whitehouse */ 151b1e71b06SSteven Whitehouse 152b1e71b06SSteven Whitehouse static int gfs2_jdata_writepage(struct page *page, struct writeback_control *wbc) 153b1e71b06SSteven Whitehouse { 154c0ba597dSMatthew Wilcox (Oracle) struct folio *folio = page_folio(page); 155b1e71b06SSteven Whitehouse struct inode *inode = page->mapping->host; 156fd4c5748SBenjamin Marzinski struct gfs2_inode *ip = GFS2_I(inode); 157b1e71b06SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 158b1e71b06SSteven Whitehouse 159fd4c5748SBenjamin Marzinski if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(ip->i_gl))) 160fd4c5748SBenjamin Marzinski goto out; 161c0ba597dSMatthew Wilcox (Oracle) if (folio_test_checked(folio) || current->journal_info) 162b1e71b06SSteven Whitehouse goto out_ignore; 163d0cfcaeeSMatthew Wilcox (Oracle) return __gfs2_jdata_write_folio(folio, wbc); 164b1e71b06SSteven Whitehouse 165b1e71b06SSteven Whitehouse out_ignore: 166c0ba597dSMatthew Wilcox (Oracle) folio_redirty_for_writepage(wbc, folio); 167fd4c5748SBenjamin Marzinski out: 168c0ba597dSMatthew Wilcox (Oracle) folio_unlock(folio); 169b1e71b06SSteven Whitehouse return 0; 170b1e71b06SSteven Whitehouse } 171b1e71b06SSteven Whitehouse 172b1e71b06SSteven Whitehouse /** 17345138990SSteven Whitehouse * gfs2_writepages - Write a bunch of dirty pages back to disk 174b1e71b06SSteven Whitehouse * @mapping: The mapping to write 175b1e71b06SSteven Whitehouse * @wbc: Write-back control 176b1e71b06SSteven Whitehouse * 17745138990SSteven Whitehouse * Used for both ordered and writeback modes. 178b1e71b06SSteven Whitehouse */ 17945138990SSteven Whitehouse static int gfs2_writepages(struct address_space *mapping, 180b1e71b06SSteven Whitehouse struct writeback_control *wbc) 181b1e71b06SSteven Whitehouse { 182b066a4eeSAbhi Das struct gfs2_sbd *sdp = gfs2_mapping2sbd(mapping); 1832164f9b9SChristoph Hellwig struct iomap_writepage_ctx wpc = { }; 1842164f9b9SChristoph Hellwig int ret; 185b066a4eeSAbhi Das 186b066a4eeSAbhi Das /* 187b066a4eeSAbhi Das * Even if we didn't write any pages here, we might still be holding 188b066a4eeSAbhi Das * dirty pages in the ail. We forcibly flush the ail because we don't 189b066a4eeSAbhi Das * want balance_dirty_pages() to loop indefinitely trying to write out 190b066a4eeSAbhi Das * pages held in the ail that it can't find. 191b066a4eeSAbhi Das */ 1922164f9b9SChristoph Hellwig ret = iomap_writepages(mapping, wbc, &wpc, &gfs2_writeback_ops); 193b066a4eeSAbhi Das if (ret == 0) 194b066a4eeSAbhi Das set_bit(SDF_FORCE_AIL_FLUSH, &sdp->sd_flags); 195b066a4eeSAbhi Das return ret; 196b1e71b06SSteven Whitehouse } 197b1e71b06SSteven Whitehouse 198b1e71b06SSteven Whitehouse /** 19987ed37e6SVishal Moola (Oracle) * gfs2_write_jdata_batch - Write back a folio batch's worth of folios 200b1e71b06SSteven Whitehouse * @mapping: The mapping 201b1e71b06SSteven Whitehouse * @wbc: The writeback control 20287ed37e6SVishal Moola (Oracle) * @fbatch: The batch of folios 2031272574bSFabian Frederick * @done_index: Page index 204b1e71b06SSteven Whitehouse * 205b1e71b06SSteven Whitehouse * Returns: non-zero if loop should terminate, zero otherwise 206b1e71b06SSteven Whitehouse */ 207b1e71b06SSteven Whitehouse 20887ed37e6SVishal Moola (Oracle) static int gfs2_write_jdata_batch(struct address_space *mapping, 209b1e71b06SSteven Whitehouse struct writeback_control *wbc, 21087ed37e6SVishal Moola (Oracle) struct folio_batch *fbatch, 211774016b2SSteven Whitehouse pgoff_t *done_index) 212b1e71b06SSteven Whitehouse { 213b1e71b06SSteven Whitehouse struct inode *inode = mapping->host; 214b1e71b06SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 21587ed37e6SVishal Moola (Oracle) unsigned nrblocks; 216b1e71b06SSteven Whitehouse int i; 217b1e71b06SSteven Whitehouse int ret; 21887ed37e6SVishal Moola (Oracle) int nr_pages = 0; 21987ed37e6SVishal Moola (Oracle) int nr_folios = folio_batch_count(fbatch); 22087ed37e6SVishal Moola (Oracle) 22187ed37e6SVishal Moola (Oracle) for (i = 0; i < nr_folios; i++) 22287ed37e6SVishal Moola (Oracle) nr_pages += folio_nr_pages(fbatch->folios[i]); 22387ed37e6SVishal Moola (Oracle) nrblocks = nr_pages * (PAGE_SIZE >> inode->i_blkbits); 224b1e71b06SSteven Whitehouse 225b1e71b06SSteven Whitehouse ret = gfs2_trans_begin(sdp, nrblocks, nrblocks); 226b1e71b06SSteven Whitehouse if (ret < 0) 227b1e71b06SSteven Whitehouse return ret; 228b1e71b06SSteven Whitehouse 22987ed37e6SVishal Moola (Oracle) for (i = 0; i < nr_folios; i++) { 23087ed37e6SVishal Moola (Oracle) struct folio *folio = fbatch->folios[i]; 231b1e71b06SSteven Whitehouse 23287ed37e6SVishal Moola (Oracle) *done_index = folio->index; 233774016b2SSteven Whitehouse 23487ed37e6SVishal Moola (Oracle) folio_lock(folio); 235b1e71b06SSteven Whitehouse 23687ed37e6SVishal Moola (Oracle) if (unlikely(folio->mapping != mapping)) { 237774016b2SSteven Whitehouse continue_unlock: 23887ed37e6SVishal Moola (Oracle) folio_unlock(folio); 239b1e71b06SSteven Whitehouse continue; 240b1e71b06SSteven Whitehouse } 241b1e71b06SSteven Whitehouse 24287ed37e6SVishal Moola (Oracle) if (!folio_test_dirty(folio)) { 243774016b2SSteven Whitehouse /* someone wrote it for us */ 244774016b2SSteven Whitehouse goto continue_unlock; 245b1e71b06SSteven Whitehouse } 246b1e71b06SSteven Whitehouse 24787ed37e6SVishal Moola (Oracle) if (folio_test_writeback(folio)) { 248b1e71b06SSteven Whitehouse if (wbc->sync_mode != WB_SYNC_NONE) 24987ed37e6SVishal Moola (Oracle) folio_wait_writeback(folio); 250774016b2SSteven Whitehouse else 251774016b2SSteven Whitehouse goto continue_unlock; 252b1e71b06SSteven Whitehouse } 253b1e71b06SSteven Whitehouse 25487ed37e6SVishal Moola (Oracle) BUG_ON(folio_test_writeback(folio)); 25587ed37e6SVishal Moola (Oracle) if (!folio_clear_dirty_for_io(folio)) 256774016b2SSteven Whitehouse goto continue_unlock; 257774016b2SSteven Whitehouse 258de1414a6SChristoph Hellwig trace_wbc_writepage(wbc, inode_to_bdi(inode)); 259b1e71b06SSteven Whitehouse 260d0cfcaeeSMatthew Wilcox (Oracle) ret = __gfs2_jdata_write_folio(folio, wbc); 261774016b2SSteven Whitehouse if (unlikely(ret)) { 262774016b2SSteven Whitehouse if (ret == AOP_WRITEPAGE_ACTIVATE) { 26387ed37e6SVishal Moola (Oracle) folio_unlock(folio); 264774016b2SSteven Whitehouse ret = 0; 265774016b2SSteven Whitehouse } else { 266b1e71b06SSteven Whitehouse 267774016b2SSteven Whitehouse /* 268774016b2SSteven Whitehouse * done_index is set past this page, 269774016b2SSteven Whitehouse * so media errors will not choke 270774016b2SSteven Whitehouse * background writeout for the entire 271774016b2SSteven Whitehouse * file. This has consequences for 272774016b2SSteven Whitehouse * range_cyclic semantics (ie. it may 273774016b2SSteven Whitehouse * not be suitable for data integrity 274774016b2SSteven Whitehouse * writeout). 275774016b2SSteven Whitehouse */ 27687ed37e6SVishal Moola (Oracle) *done_index = folio->index + 27787ed37e6SVishal Moola (Oracle) folio_nr_pages(folio); 278b1e71b06SSteven Whitehouse ret = 1; 279774016b2SSteven Whitehouse break; 280774016b2SSteven Whitehouse } 281774016b2SSteven Whitehouse } 282774016b2SSteven Whitehouse 283774016b2SSteven Whitehouse /* 284774016b2SSteven Whitehouse * We stop writing back only if we are not doing 285774016b2SSteven Whitehouse * integrity sync. In case of integrity sync we have to 286774016b2SSteven Whitehouse * keep going until we have written all the pages 287774016b2SSteven Whitehouse * we tagged for writeback prior to entering this loop. 288774016b2SSteven Whitehouse */ 289774016b2SSteven Whitehouse if (--wbc->nr_to_write <= 0 && wbc->sync_mode == WB_SYNC_NONE) { 290774016b2SSteven Whitehouse ret = 1; 291774016b2SSteven Whitehouse break; 292774016b2SSteven Whitehouse } 293774016b2SSteven Whitehouse 294b1e71b06SSteven Whitehouse } 295b1e71b06SSteven Whitehouse gfs2_trans_end(sdp); 296b1e71b06SSteven Whitehouse return ret; 297b1e71b06SSteven Whitehouse } 298b1e71b06SSteven Whitehouse 299b1e71b06SSteven Whitehouse /** 300b1e71b06SSteven Whitehouse * gfs2_write_cache_jdata - Like write_cache_pages but different 301b1e71b06SSteven Whitehouse * @mapping: The mapping to write 302b1e71b06SSteven Whitehouse * @wbc: The writeback control 303b1e71b06SSteven Whitehouse * 304b1e71b06SSteven Whitehouse * The reason that we use our own function here is that we need to 305b1e71b06SSteven Whitehouse * start transactions before we grab page locks. This allows us 306b1e71b06SSteven Whitehouse * to get the ordering right. 307b1e71b06SSteven Whitehouse */ 308b1e71b06SSteven Whitehouse 309b1e71b06SSteven Whitehouse static int gfs2_write_cache_jdata(struct address_space *mapping, 310b1e71b06SSteven Whitehouse struct writeback_control *wbc) 311b1e71b06SSteven Whitehouse { 312b1e71b06SSteven Whitehouse int ret = 0; 313b1e71b06SSteven Whitehouse int done = 0; 31487ed37e6SVishal Moola (Oracle) struct folio_batch fbatch; 31587ed37e6SVishal Moola (Oracle) int nr_folios; 3163f649ab7SKees Cook pgoff_t writeback_index; 317b1e71b06SSteven Whitehouse pgoff_t index; 318b1e71b06SSteven Whitehouse pgoff_t end; 319774016b2SSteven Whitehouse pgoff_t done_index; 320774016b2SSteven Whitehouse int cycled; 321b1e71b06SSteven Whitehouse int range_whole = 0; 32210bbd235SMatthew Wilcox xa_mark_t tag; 323b1e71b06SSteven Whitehouse 32487ed37e6SVishal Moola (Oracle) folio_batch_init(&fbatch); 325b1e71b06SSteven Whitehouse if (wbc->range_cyclic) { 326774016b2SSteven Whitehouse writeback_index = mapping->writeback_index; /* prev offset */ 327774016b2SSteven Whitehouse index = writeback_index; 328774016b2SSteven Whitehouse if (index == 0) 329774016b2SSteven Whitehouse cycled = 1; 330774016b2SSteven Whitehouse else 331774016b2SSteven Whitehouse cycled = 0; 332b1e71b06SSteven Whitehouse end = -1; 333b1e71b06SSteven Whitehouse } else { 33409cbfeafSKirill A. Shutemov index = wbc->range_start >> PAGE_SHIFT; 33509cbfeafSKirill A. Shutemov end = wbc->range_end >> PAGE_SHIFT; 336b1e71b06SSteven Whitehouse if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) 337b1e71b06SSteven Whitehouse range_whole = 1; 338774016b2SSteven Whitehouse cycled = 1; /* ignore range_cyclic tests */ 339b1e71b06SSteven Whitehouse } 340774016b2SSteven Whitehouse if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) 341774016b2SSteven Whitehouse tag = PAGECACHE_TAG_TOWRITE; 342774016b2SSteven Whitehouse else 343774016b2SSteven Whitehouse tag = PAGECACHE_TAG_DIRTY; 344b1e71b06SSteven Whitehouse 345b1e71b06SSteven Whitehouse retry: 346774016b2SSteven Whitehouse if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) 347774016b2SSteven Whitehouse tag_pages_for_writeback(mapping, index, end); 348774016b2SSteven Whitehouse done_index = index; 349774016b2SSteven Whitehouse while (!done && (index <= end)) { 35087ed37e6SVishal Moola (Oracle) nr_folios = filemap_get_folios_tag(mapping, &index, end, 35187ed37e6SVishal Moola (Oracle) tag, &fbatch); 35287ed37e6SVishal Moola (Oracle) if (nr_folios == 0) 353774016b2SSteven Whitehouse break; 354774016b2SSteven Whitehouse 35587ed37e6SVishal Moola (Oracle) ret = gfs2_write_jdata_batch(mapping, wbc, &fbatch, 35687ed37e6SVishal Moola (Oracle) &done_index); 357b1e71b06SSteven Whitehouse if (ret) 358b1e71b06SSteven Whitehouse done = 1; 359b1e71b06SSteven Whitehouse if (ret > 0) 360b1e71b06SSteven Whitehouse ret = 0; 36187ed37e6SVishal Moola (Oracle) folio_batch_release(&fbatch); 362b1e71b06SSteven Whitehouse cond_resched(); 363b1e71b06SSteven Whitehouse } 364b1e71b06SSteven Whitehouse 365774016b2SSteven Whitehouse if (!cycled && !done) { 366b1e71b06SSteven Whitehouse /* 367774016b2SSteven Whitehouse * range_cyclic: 368b1e71b06SSteven Whitehouse * We hit the last page and there is more work to be done: wrap 369b1e71b06SSteven Whitehouse * back to the start of the file 370b1e71b06SSteven Whitehouse */ 371774016b2SSteven Whitehouse cycled = 1; 372b1e71b06SSteven Whitehouse index = 0; 373774016b2SSteven Whitehouse end = writeback_index - 1; 374b1e71b06SSteven Whitehouse goto retry; 375b1e71b06SSteven Whitehouse } 376b1e71b06SSteven Whitehouse 377b1e71b06SSteven Whitehouse if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) 378774016b2SSteven Whitehouse mapping->writeback_index = done_index; 379774016b2SSteven Whitehouse 380b1e71b06SSteven Whitehouse return ret; 381b1e71b06SSteven Whitehouse } 382b1e71b06SSteven Whitehouse 383b1e71b06SSteven Whitehouse 384b1e71b06SSteven Whitehouse /** 385b1e71b06SSteven Whitehouse * gfs2_jdata_writepages - Write a bunch of dirty pages back to disk 386b1e71b06SSteven Whitehouse * @mapping: The mapping to write 387b1e71b06SSteven Whitehouse * @wbc: The writeback control 388b1e71b06SSteven Whitehouse * 389b1e71b06SSteven Whitehouse */ 390b1e71b06SSteven Whitehouse 391b1e71b06SSteven Whitehouse static int gfs2_jdata_writepages(struct address_space *mapping, 392b1e71b06SSteven Whitehouse struct writeback_control *wbc) 393b1e71b06SSteven Whitehouse { 394b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(mapping->host); 395b1e71b06SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(mapping->host); 396b1e71b06SSteven Whitehouse int ret; 397b1e71b06SSteven Whitehouse 398b1e71b06SSteven Whitehouse ret = gfs2_write_cache_jdata(mapping, wbc); 399b1e71b06SSteven Whitehouse if (ret == 0 && wbc->sync_mode == WB_SYNC_ALL) { 400805c0907SBob Peterson gfs2_log_flush(sdp, ip->i_gl, GFS2_LOG_HEAD_FLUSH_NORMAL | 401805c0907SBob Peterson GFS2_LFC_JDATA_WPAGES); 402b1e71b06SSteven Whitehouse ret = gfs2_write_cache_jdata(mapping, wbc); 403b1e71b06SSteven Whitehouse } 404b1e71b06SSteven Whitehouse return ret; 405b1e71b06SSteven Whitehouse } 406b1e71b06SSteven Whitehouse 407b1e71b06SSteven Whitehouse /** 408b1e71b06SSteven Whitehouse * stuffed_readpage - Fill in a Linux page with stuffed file data 409b1e71b06SSteven Whitehouse * @ip: the inode 410b1e71b06SSteven Whitehouse * @page: the page 411b1e71b06SSteven Whitehouse * 412b1e71b06SSteven Whitehouse * Returns: errno 413b1e71b06SSteven Whitehouse */ 414378b6cbfSChristoph Hellwig static int stuffed_readpage(struct gfs2_inode *ip, struct page *page) 415b1e71b06SSteven Whitehouse { 416b1e71b06SSteven Whitehouse struct buffer_head *dibh; 417602c89d2SSteven Whitehouse u64 dsize = i_size_read(&ip->i_inode); 418b1e71b06SSteven Whitehouse void *kaddr; 419b1e71b06SSteven Whitehouse int error; 420b1e71b06SSteven Whitehouse 421b1e71b06SSteven Whitehouse /* 422b1e71b06SSteven Whitehouse * Due to the order of unstuffing files and ->fault(), we can be 423b1e71b06SSteven Whitehouse * asked for a zero page in the case of a stuffed file being extended, 424b1e71b06SSteven Whitehouse * so we need to supply one here. It doesn't happen often. 425b1e71b06SSteven Whitehouse */ 426b1e71b06SSteven Whitehouse if (unlikely(page->index)) { 42709cbfeafSKirill A. Shutemov zero_user(page, 0, PAGE_SIZE); 428b1e71b06SSteven Whitehouse SetPageUptodate(page); 429b1e71b06SSteven Whitehouse return 0; 430b1e71b06SSteven Whitehouse } 431b1e71b06SSteven Whitehouse 432b1e71b06SSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 433b1e71b06SSteven Whitehouse if (error) 434b1e71b06SSteven Whitehouse return error; 435b1e71b06SSteven Whitehouse 436d9349285SCong Wang kaddr = kmap_atomic(page); 437602c89d2SSteven Whitehouse memcpy(kaddr, dibh->b_data + sizeof(struct gfs2_dinode), dsize); 43809cbfeafSKirill A. Shutemov memset(kaddr + dsize, 0, PAGE_SIZE - dsize); 439d9349285SCong Wang kunmap_atomic(kaddr); 440b1e71b06SSteven Whitehouse flush_dcache_page(page); 441b1e71b06SSteven Whitehouse brelse(dibh); 442b1e71b06SSteven Whitehouse SetPageUptodate(page); 443b1e71b06SSteven Whitehouse 444b1e71b06SSteven Whitehouse return 0; 445b1e71b06SSteven Whitehouse } 446b1e71b06SSteven Whitehouse 447e9b5b23eSMatthew Wilcox (Oracle) /** 448e9b5b23eSMatthew Wilcox (Oracle) * gfs2_read_folio - read a folio from a file 449e9b5b23eSMatthew Wilcox (Oracle) * @file: The file to read 450e9b5b23eSMatthew Wilcox (Oracle) * @folio: The folio in the file 451e9b5b23eSMatthew Wilcox (Oracle) */ 452e9b5b23eSMatthew Wilcox (Oracle) static int gfs2_read_folio(struct file *file, struct folio *folio) 453b1e71b06SSteven Whitehouse { 454e9b5b23eSMatthew Wilcox (Oracle) struct inode *inode = folio->mapping->host; 4552164f9b9SChristoph Hellwig struct gfs2_inode *ip = GFS2_I(inode); 4562164f9b9SChristoph Hellwig struct gfs2_sbd *sdp = GFS2_SB(inode); 457b1e71b06SSteven Whitehouse int error; 458b1e71b06SSteven Whitehouse 4592164f9b9SChristoph Hellwig if (!gfs2_is_jdata(ip) || 460e9b5b23eSMatthew Wilcox (Oracle) (i_blocksize(inode) == PAGE_SIZE && !folio_buffers(folio))) { 4617479c505SMatthew Wilcox (Oracle) error = iomap_read_folio(folio, &gfs2_iomap_ops); 462f95cbb44SAndreas Gruenbacher } else if (gfs2_is_stuffed(ip)) { 463e9b5b23eSMatthew Wilcox (Oracle) error = stuffed_readpage(ip, &folio->page); 464e9b5b23eSMatthew Wilcox (Oracle) folio_unlock(folio); 465b1e71b06SSteven Whitehouse } else { 466f132ab7dSMatthew Wilcox (Oracle) error = mpage_read_folio(folio, gfs2_block_map); 467b1e71b06SSteven Whitehouse } 468b1e71b06SSteven Whitehouse 469eb43e660SBob Peterson if (unlikely(gfs2_withdrawn(sdp))) 470b1e71b06SSteven Whitehouse return -EIO; 471b1e71b06SSteven Whitehouse 472b1e71b06SSteven Whitehouse return error; 473b1e71b06SSteven Whitehouse } 474b1e71b06SSteven Whitehouse 475b1e71b06SSteven Whitehouse /** 476b1e71b06SSteven Whitehouse * gfs2_internal_read - read an internal file 477b1e71b06SSteven Whitehouse * @ip: The gfs2 inode 478b1e71b06SSteven Whitehouse * @buf: The buffer to fill 479b1e71b06SSteven Whitehouse * @pos: The file position 480b1e71b06SSteven Whitehouse * @size: The amount to read 481b1e71b06SSteven Whitehouse * 482b1e71b06SSteven Whitehouse */ 483b1e71b06SSteven Whitehouse 4844306629eSAndrew Price int gfs2_internal_read(struct gfs2_inode *ip, char *buf, loff_t *pos, 4854306629eSAndrew Price unsigned size) 486b1e71b06SSteven Whitehouse { 487b1e71b06SSteven Whitehouse struct address_space *mapping = ip->i_inode.i_mapping; 48845eb0504SAndreas Gruenbacher unsigned long index = *pos >> PAGE_SHIFT; 48909cbfeafSKirill A. Shutemov unsigned offset = *pos & (PAGE_SIZE - 1); 490b1e71b06SSteven Whitehouse unsigned copied = 0; 491b1e71b06SSteven Whitehouse unsigned amt; 492b1e71b06SSteven Whitehouse struct page *page; 493b1e71b06SSteven Whitehouse void *p; 494b1e71b06SSteven Whitehouse 495b1e71b06SSteven Whitehouse do { 496b1e71b06SSteven Whitehouse amt = size - copied; 49709cbfeafSKirill A. Shutemov if (offset + size > PAGE_SIZE) 49809cbfeafSKirill A. Shutemov amt = PAGE_SIZE - offset; 499e9b5b23eSMatthew Wilcox (Oracle) page = read_cache_page(mapping, index, gfs2_read_folio, NULL); 500b1e71b06SSteven Whitehouse if (IS_ERR(page)) 501b1e71b06SSteven Whitehouse return PTR_ERR(page); 502d9349285SCong Wang p = kmap_atomic(page); 503b1e71b06SSteven Whitehouse memcpy(buf + copied, p + offset, amt); 504d9349285SCong Wang kunmap_atomic(p); 50509cbfeafSKirill A. Shutemov put_page(page); 506b1e71b06SSteven Whitehouse copied += amt; 507b1e71b06SSteven Whitehouse index++; 508b1e71b06SSteven Whitehouse offset = 0; 509b1e71b06SSteven Whitehouse } while(copied < size); 510b1e71b06SSteven Whitehouse (*pos) += size; 511b1e71b06SSteven Whitehouse return size; 512b1e71b06SSteven Whitehouse } 513b1e71b06SSteven Whitehouse 514b1e71b06SSteven Whitehouse /** 515d4388340SMatthew Wilcox (Oracle) * gfs2_readahead - Read a bunch of pages at once 516c551f66cSLee Jones * @rac: Read-ahead control structure 517b1e71b06SSteven Whitehouse * 518b1e71b06SSteven Whitehouse * Some notes: 519b1e71b06SSteven Whitehouse * 1. This is only for readahead, so we can simply ignore any things 520b1e71b06SSteven Whitehouse * which are slightly inconvenient (such as locking conflicts between 521b1e71b06SSteven Whitehouse * the page lock and the glock) and return having done no I/O. Its 522b1e71b06SSteven Whitehouse * obviously not something we'd want to do on too regular a basis. 523b1e71b06SSteven Whitehouse * Any I/O we ignore at this time will be done via readpage later. 524b1e71b06SSteven Whitehouse * 2. We don't handle stuffed files here we let readpage do the honours. 525d4388340SMatthew Wilcox (Oracle) * 3. mpage_readahead() does most of the heavy lifting in the common case. 526b1e71b06SSteven Whitehouse * 4. gfs2_block_map() is relied upon to set BH_Boundary in the right places. 527b1e71b06SSteven Whitehouse */ 528b1e71b06SSteven Whitehouse 529d4388340SMatthew Wilcox (Oracle) static void gfs2_readahead(struct readahead_control *rac) 530b1e71b06SSteven Whitehouse { 531d4388340SMatthew Wilcox (Oracle) struct inode *inode = rac->mapping->host; 532b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 533b1e71b06SSteven Whitehouse 5342164f9b9SChristoph Hellwig if (gfs2_is_stuffed(ip)) 5352164f9b9SChristoph Hellwig ; 5362164f9b9SChristoph Hellwig else if (gfs2_is_jdata(ip)) 537d4388340SMatthew Wilcox (Oracle) mpage_readahead(rac, gfs2_block_map); 5382164f9b9SChristoph Hellwig else 5392164f9b9SChristoph Hellwig iomap_readahead(rac, &gfs2_iomap_ops); 540b1e71b06SSteven Whitehouse } 541b1e71b06SSteven Whitehouse 542b1e71b06SSteven Whitehouse /** 543b1e71b06SSteven Whitehouse * adjust_fs_space - Adjusts the free space available due to gfs2_grow 544b1e71b06SSteven Whitehouse * @inode: the rindex inode 545b1e71b06SSteven Whitehouse */ 54664bc06bbSAndreas Gruenbacher void adjust_fs_space(struct inode *inode) 547b1e71b06SSteven Whitehouse { 548d0a22a4bSAndreas Gruenbacher struct gfs2_sbd *sdp = GFS2_SB(inode); 5491946f70aSBenjamin Marzinski struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 550b1e71b06SSteven Whitehouse struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 551b1e71b06SSteven Whitehouse struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 55270c11ba8SBob Peterson struct buffer_head *m_bh; 553b1e71b06SSteven Whitehouse u64 fs_total, new_free; 554b1e71b06SSteven Whitehouse 555d0a22a4bSAndreas Gruenbacher if (gfs2_trans_begin(sdp, 2 * RES_STATFS, 0) != 0) 556d0a22a4bSAndreas Gruenbacher return; 557d0a22a4bSAndreas Gruenbacher 558b1e71b06SSteven Whitehouse /* Total up the file system space, according to the latest rindex. */ 559b1e71b06SSteven Whitehouse fs_total = gfs2_ri_total(sdp); 5601946f70aSBenjamin Marzinski if (gfs2_meta_inode_buffer(m_ip, &m_bh) != 0) 561d0a22a4bSAndreas Gruenbacher goto out; 562b1e71b06SSteven Whitehouse 563b1e71b06SSteven Whitehouse spin_lock(&sdp->sd_statfs_spin); 5641946f70aSBenjamin Marzinski gfs2_statfs_change_in(m_sc, m_bh->b_data + 5651946f70aSBenjamin Marzinski sizeof(struct gfs2_dinode)); 566b1e71b06SSteven Whitehouse if (fs_total > (m_sc->sc_total + l_sc->sc_total)) 567b1e71b06SSteven Whitehouse new_free = fs_total - (m_sc->sc_total + l_sc->sc_total); 568b1e71b06SSteven Whitehouse else 569b1e71b06SSteven Whitehouse new_free = 0; 570b1e71b06SSteven Whitehouse spin_unlock(&sdp->sd_statfs_spin); 571b1e71b06SSteven Whitehouse fs_warn(sdp, "File system extended by %llu blocks.\n", 572b1e71b06SSteven Whitehouse (unsigned long long)new_free); 573b1e71b06SSteven Whitehouse gfs2_statfs_change(sdp, new_free, new_free, 0); 5741946f70aSBenjamin Marzinski 57570c11ba8SBob Peterson update_statfs(sdp, m_bh); 5761946f70aSBenjamin Marzinski brelse(m_bh); 577d0a22a4bSAndreas Gruenbacher out: 578d0a22a4bSAndreas Gruenbacher sdp->sd_rindex_uptodate = 0; 579d0a22a4bSAndreas Gruenbacher gfs2_trans_end(sdp); 580b1e71b06SSteven Whitehouse } 581b1e71b06SSteven Whitehouse 582e621900aSMatthew Wilcox (Oracle) static bool jdata_dirty_folio(struct address_space *mapping, 583e621900aSMatthew Wilcox (Oracle) struct folio *folio) 584b1e71b06SSteven Whitehouse { 5856302d6f4SBob Peterson if (current->journal_info) 586e621900aSMatthew Wilcox (Oracle) folio_set_checked(folio); 587e621900aSMatthew Wilcox (Oracle) return block_dirty_folio(mapping, folio); 588b1e71b06SSteven Whitehouse } 589b1e71b06SSteven Whitehouse 590b1e71b06SSteven Whitehouse /** 591b1e71b06SSteven Whitehouse * gfs2_bmap - Block map function 592b1e71b06SSteven Whitehouse * @mapping: Address space info 593b1e71b06SSteven Whitehouse * @lblock: The block to map 594b1e71b06SSteven Whitehouse * 595b1e71b06SSteven Whitehouse * Returns: The disk address for the block or 0 on hole or error 596b1e71b06SSteven Whitehouse */ 597b1e71b06SSteven Whitehouse 598b1e71b06SSteven Whitehouse static sector_t gfs2_bmap(struct address_space *mapping, sector_t lblock) 599b1e71b06SSteven Whitehouse { 600b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(mapping->host); 601b1e71b06SSteven Whitehouse struct gfs2_holder i_gh; 602b1e71b06SSteven Whitehouse sector_t dblock = 0; 603b1e71b06SSteven Whitehouse int error; 604b1e71b06SSteven Whitehouse 605b1e71b06SSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 606b1e71b06SSteven Whitehouse if (error) 607b1e71b06SSteven Whitehouse return 0; 608b1e71b06SSteven Whitehouse 609b1e71b06SSteven Whitehouse if (!gfs2_is_stuffed(ip)) 6107770c93aSChristoph Hellwig dblock = iomap_bmap(mapping, lblock, &gfs2_iomap_ops); 611b1e71b06SSteven Whitehouse 612b1e71b06SSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 613b1e71b06SSteven Whitehouse 614b1e71b06SSteven Whitehouse return dblock; 615b1e71b06SSteven Whitehouse } 616b1e71b06SSteven Whitehouse 617b1e71b06SSteven Whitehouse static void gfs2_discard(struct gfs2_sbd *sdp, struct buffer_head *bh) 618b1e71b06SSteven Whitehouse { 619b1e71b06SSteven Whitehouse struct gfs2_bufdata *bd; 620b1e71b06SSteven Whitehouse 621b1e71b06SSteven Whitehouse lock_buffer(bh); 622b1e71b06SSteven Whitehouse gfs2_log_lock(sdp); 623b1e71b06SSteven Whitehouse clear_buffer_dirty(bh); 624b1e71b06SSteven Whitehouse bd = bh->b_private; 625b1e71b06SSteven Whitehouse if (bd) { 626c0752aa7SBob Peterson if (!list_empty(&bd->bd_list) && !buffer_pinned(bh)) 627c0752aa7SBob Peterson list_del_init(&bd->bd_list); 62868942870SBob Peterson else { 62968942870SBob Peterson spin_lock(&sdp->sd_ail_lock); 63068cd4ce2SBob Peterson gfs2_remove_from_journal(bh, REMOVE_JDATA); 63168942870SBob Peterson spin_unlock(&sdp->sd_ail_lock); 63268942870SBob Peterson } 633b1e71b06SSteven Whitehouse } 634b1e71b06SSteven Whitehouse bh->b_bdev = NULL; 635b1e71b06SSteven Whitehouse clear_buffer_mapped(bh); 636b1e71b06SSteven Whitehouse clear_buffer_req(bh); 637b1e71b06SSteven Whitehouse clear_buffer_new(bh); 638b1e71b06SSteven Whitehouse gfs2_log_unlock(sdp); 639b1e71b06SSteven Whitehouse unlock_buffer(bh); 640b1e71b06SSteven Whitehouse } 641b1e71b06SSteven Whitehouse 6425f4b2976SMatthew Wilcox (Oracle) static void gfs2_invalidate_folio(struct folio *folio, size_t offset, 6435f4b2976SMatthew Wilcox (Oracle) size_t length) 644b1e71b06SSteven Whitehouse { 6455f4b2976SMatthew Wilcox (Oracle) struct gfs2_sbd *sdp = GFS2_SB(folio->mapping->host); 6465f4b2976SMatthew Wilcox (Oracle) size_t stop = offset + length; 6475f4b2976SMatthew Wilcox (Oracle) int partial_page = (offset || length < folio_size(folio)); 648b1e71b06SSteven Whitehouse struct buffer_head *bh, *head; 649b1e71b06SSteven Whitehouse unsigned long pos = 0; 650b1e71b06SSteven Whitehouse 6515f4b2976SMatthew Wilcox (Oracle) BUG_ON(!folio_test_locked(folio)); 6525c0bb97cSLukas Czerner if (!partial_page) 6535f4b2976SMatthew Wilcox (Oracle) folio_clear_checked(folio); 6545f4b2976SMatthew Wilcox (Oracle) head = folio_buffers(folio); 6555f4b2976SMatthew Wilcox (Oracle) if (!head) 656b1e71b06SSteven Whitehouse goto out; 657b1e71b06SSteven Whitehouse 6585f4b2976SMatthew Wilcox (Oracle) bh = head; 659b1e71b06SSteven Whitehouse do { 6605c0bb97cSLukas Czerner if (pos + bh->b_size > stop) 6615c0bb97cSLukas Czerner return; 6625c0bb97cSLukas Czerner 663b1e71b06SSteven Whitehouse if (offset <= pos) 664b1e71b06SSteven Whitehouse gfs2_discard(sdp, bh); 665b1e71b06SSteven Whitehouse pos += bh->b_size; 666b1e71b06SSteven Whitehouse bh = bh->b_this_page; 667b1e71b06SSteven Whitehouse } while (bh != head); 668b1e71b06SSteven Whitehouse out: 6695c0bb97cSLukas Czerner if (!partial_page) 6705f4b2976SMatthew Wilcox (Oracle) filemap_release_folio(folio, 0); 671b1e71b06SSteven Whitehouse } 672b1e71b06SSteven Whitehouse 673b1e71b06SSteven Whitehouse /** 674e45c20d1SMatthew Wilcox (Oracle) * gfs2_release_folio - free the metadata associated with a folio 675e45c20d1SMatthew Wilcox (Oracle) * @folio: the folio that's being released 676b1e71b06SSteven Whitehouse * @gfp_mask: passed from Linux VFS, ignored by us 677b1e71b06SSteven Whitehouse * 678e45c20d1SMatthew Wilcox (Oracle) * Calls try_to_free_buffers() to free the buffers and put the folio if the 6790ebbe4f9SAndreas Gruenbacher * buffers can be released. 680b1e71b06SSteven Whitehouse * 681e45c20d1SMatthew Wilcox (Oracle) * Returns: true if the folio was put or else false 682b1e71b06SSteven Whitehouse */ 683b1e71b06SSteven Whitehouse 684e45c20d1SMatthew Wilcox (Oracle) bool gfs2_release_folio(struct folio *folio, gfp_t gfp_mask) 685b1e71b06SSteven Whitehouse { 686e45c20d1SMatthew Wilcox (Oracle) struct address_space *mapping = folio->mapping; 687009d8518SSteven Whitehouse struct gfs2_sbd *sdp = gfs2_mapping2sbd(mapping); 688b1e71b06SSteven Whitehouse struct buffer_head *bh, *head; 689b1e71b06SSteven Whitehouse struct gfs2_bufdata *bd; 690b1e71b06SSteven Whitehouse 691e45c20d1SMatthew Wilcox (Oracle) head = folio_buffers(folio); 692e45c20d1SMatthew Wilcox (Oracle) if (!head) 693e45c20d1SMatthew Wilcox (Oracle) return false; 694b1e71b06SSteven Whitehouse 6951c185c02SAndreas Gruenbacher /* 696e45c20d1SMatthew Wilcox (Oracle) * mm accommodates an old ext3 case where clean folios might 697e45c20d1SMatthew Wilcox (Oracle) * not have had the dirty bit cleared. Thus, it can send actual 698e45c20d1SMatthew Wilcox (Oracle) * dirty folios to ->release_folio() via shrink_active_list(). 6991c185c02SAndreas Gruenbacher * 700e45c20d1SMatthew Wilcox (Oracle) * As a workaround, we skip folios that contain dirty buffers 701e45c20d1SMatthew Wilcox (Oracle) * below. Once ->release_folio isn't called on dirty folios 702e45c20d1SMatthew Wilcox (Oracle) * anymore, we can warn on dirty buffers like we used to here 703e45c20d1SMatthew Wilcox (Oracle) * again. 7041c185c02SAndreas Gruenbacher */ 7051c185c02SAndreas Gruenbacher 706b1e71b06SSteven Whitehouse gfs2_log_lock(sdp); 707e45c20d1SMatthew Wilcox (Oracle) bh = head; 708b1e71b06SSteven Whitehouse do { 709b1e71b06SSteven Whitehouse if (atomic_read(&bh->b_count)) 710b1e71b06SSteven Whitehouse goto cannot_release; 711b1e71b06SSteven Whitehouse bd = bh->b_private; 71216ca9412SBenjamin Marzinski if (bd && bd->bd_tr) 713b1e71b06SSteven Whitehouse goto cannot_release; 7141c185c02SAndreas Gruenbacher if (buffer_dirty(bh) || WARN_ON(buffer_pinned(bh))) 7151c185c02SAndreas Gruenbacher goto cannot_release; 716b1e71b06SSteven Whitehouse bh = bh->b_this_page; 717b1e71b06SSteven Whitehouse } while (bh != head); 718b1e71b06SSteven Whitehouse 719e45c20d1SMatthew Wilcox (Oracle) bh = head; 720b1e71b06SSteven Whitehouse do { 721b1e71b06SSteven Whitehouse bd = bh->b_private; 722b1e71b06SSteven Whitehouse if (bd) { 723b1e71b06SSteven Whitehouse gfs2_assert_warn(sdp, bd->bd_bh == bh); 724b1e71b06SSteven Whitehouse bd->bd_bh = NULL; 725b1e71b06SSteven Whitehouse bh->b_private = NULL; 726019dd669SBob Peterson /* 727019dd669SBob Peterson * The bd may still be queued as a revoke, in which 728019dd669SBob Peterson * case we must not dequeue nor free it. 729019dd669SBob Peterson */ 730019dd669SBob Peterson if (!bd->bd_blkno && !list_empty(&bd->bd_list)) 731019dd669SBob Peterson list_del_init(&bd->bd_list); 732019dd669SBob Peterson if (list_empty(&bd->bd_list)) 733b1e71b06SSteven Whitehouse kmem_cache_free(gfs2_bufdata_cachep, bd); 734e4f29206SSteven Whitehouse } 735b1e71b06SSteven Whitehouse 736b1e71b06SSteven Whitehouse bh = bh->b_this_page; 737b1e71b06SSteven Whitehouse } while (bh != head); 738e4f29206SSteven Whitehouse gfs2_log_unlock(sdp); 739b1e71b06SSteven Whitehouse 74068189fefSMatthew Wilcox (Oracle) return try_to_free_buffers(folio); 7418f065d36SSteven Whitehouse 742b1e71b06SSteven Whitehouse cannot_release: 743b1e71b06SSteven Whitehouse gfs2_log_unlock(sdp); 744e45c20d1SMatthew Wilcox (Oracle) return false; 745b1e71b06SSteven Whitehouse } 746b1e71b06SSteven Whitehouse 747eadd7535SChristoph Hellwig static const struct address_space_operations gfs2_aops = { 74845138990SSteven Whitehouse .writepages = gfs2_writepages, 749f132ab7dSMatthew Wilcox (Oracle) .read_folio = gfs2_read_folio, 750d4388340SMatthew Wilcox (Oracle) .readahead = gfs2_readahead, 751187c82cbSMatthew Wilcox (Oracle) .dirty_folio = filemap_dirty_folio, 7528597447dSMatthew Wilcox (Oracle) .release_folio = iomap_release_folio, 753d82354f6SMatthew Wilcox (Oracle) .invalidate_folio = iomap_invalidate_folio, 754b1e71b06SSteven Whitehouse .bmap = gfs2_bmap, 755967bcc91SAndreas Gruenbacher .direct_IO = noop_direct_IO, 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