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, 41285e0fc9SMatthew Wilcox (Oracle) size_t from, size_t 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; 46285e0fc9SMatthew Wilcox (Oracle) size_t to = from + len; 47285e0fc9SMatthew Wilcox (Oracle) size_t 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 /** 85c1401fd1SMatthew Wilcox (Oracle) * gfs2_write_jdata_folio - gfs2 jdata-specific version of block_write_full_page 86c1401fd1SMatthew 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 */ 92c1401fd1SMatthew Wilcox (Oracle) static int gfs2_write_jdata_folio(struct folio *folio, 93fd4c5748SBenjamin Marzinski struct writeback_control *wbc) 94fd4c5748SBenjamin Marzinski { 95c1401fd1SMatthew Wilcox (Oracle) struct inode * const inode = folio->mapping->host; 96fd4c5748SBenjamin Marzinski loff_t i_size = i_size_read(inode); 97fd4c5748SBenjamin Marzinski 98fd4c5748SBenjamin Marzinski /* 99c1401fd1SMatthew 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 */ 105c1401fd1SMatthew Wilcox (Oracle) if (folio_pos(folio) < i_size && 106c1401fd1SMatthew Wilcox (Oracle) i_size < folio_pos(folio) + folio_size(folio)) 107c1401fd1SMatthew Wilcox (Oracle) folio_zero_segment(folio, offset_in_folio(folio, i_size), 108c1401fd1SMatthew Wilcox (Oracle) folio_size(folio)); 109fd4c5748SBenjamin Marzinski 11053418a18SMatthew Wilcox (Oracle) return __block_write_full_folio(inode, folio, gfs2_get_block_noalloc, 11153418a18SMatthew Wilcox (Oracle) wbc, end_buffer_async_write); 112fd4c5748SBenjamin Marzinski } 113fd4c5748SBenjamin Marzinski 114b1e71b06SSteven Whitehouse /** 115d0cfcaeeSMatthew Wilcox (Oracle) * __gfs2_jdata_write_folio - The core of jdata writepage 116d0cfcaeeSMatthew Wilcox (Oracle) * @folio: The folio to write 117b1e71b06SSteven Whitehouse * @wbc: The writeback control 118b1e71b06SSteven Whitehouse * 119b1e71b06SSteven Whitehouse * This is shared between writepage and writepages and implements the 120b1e71b06SSteven Whitehouse * core of the writepage operation. If a transaction is required then 121d0cfcaeeSMatthew Wilcox (Oracle) * the checked flag will have been set and the transaction will have 122b1e71b06SSteven Whitehouse * already been started before this is called. 123b1e71b06SSteven Whitehouse */ 124d0cfcaeeSMatthew Wilcox (Oracle) static int __gfs2_jdata_write_folio(struct folio *folio, 125d0cfcaeeSMatthew Wilcox (Oracle) struct writeback_control *wbc) 126b1e71b06SSteven Whitehouse { 127d0cfcaeeSMatthew Wilcox (Oracle) struct inode *inode = folio->mapping->host; 128b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 129b1e71b06SSteven Whitehouse 130d0cfcaeeSMatthew Wilcox (Oracle) if (folio_test_checked(folio)) { 131d0cfcaeeSMatthew Wilcox (Oracle) folio_clear_checked(folio); 132d0cfcaeeSMatthew Wilcox (Oracle) if (!folio_buffers(folio)) { 133d0cfcaeeSMatthew Wilcox (Oracle) folio_create_empty_buffers(folio, 134d0cfcaeeSMatthew Wilcox (Oracle) inode->i_sb->s_blocksize, 13547a9a527SFabian Frederick BIT(BH_Dirty)|BIT(BH_Uptodate)); 136b1e71b06SSteven Whitehouse } 137d0cfcaeeSMatthew Wilcox (Oracle) gfs2_trans_add_databufs(ip, folio, 0, folio_size(folio)); 138b1e71b06SSteven Whitehouse } 139c1401fd1SMatthew Wilcox (Oracle) return gfs2_write_jdata_folio(folio, 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 { 153c0ba597dSMatthew Wilcox (Oracle) struct folio *folio = page_folio(page); 154b1e71b06SSteven Whitehouse struct inode *inode = page->mapping->host; 155fd4c5748SBenjamin Marzinski struct gfs2_inode *ip = GFS2_I(inode); 156b1e71b06SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 157b1e71b06SSteven Whitehouse 158fd4c5748SBenjamin Marzinski if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(ip->i_gl))) 159fd4c5748SBenjamin Marzinski goto out; 160c0ba597dSMatthew Wilcox (Oracle) if (folio_test_checked(folio) || current->journal_info) 161b1e71b06SSteven Whitehouse goto out_ignore; 162d0cfcaeeSMatthew Wilcox (Oracle) return __gfs2_jdata_write_folio(folio, wbc); 163b1e71b06SSteven Whitehouse 164b1e71b06SSteven Whitehouse out_ignore: 165c0ba597dSMatthew Wilcox (Oracle) folio_redirty_for_writepage(wbc, folio); 166fd4c5748SBenjamin Marzinski out: 167c0ba597dSMatthew Wilcox (Oracle) folio_unlock(folio); 168b1e71b06SSteven Whitehouse return 0; 169b1e71b06SSteven Whitehouse } 170b1e71b06SSteven Whitehouse 171b1e71b06SSteven Whitehouse /** 17245138990SSteven Whitehouse * gfs2_writepages - Write a bunch of dirty pages back to disk 173b1e71b06SSteven Whitehouse * @mapping: The mapping to write 174b1e71b06SSteven Whitehouse * @wbc: Write-back control 175b1e71b06SSteven Whitehouse * 17645138990SSteven Whitehouse * Used for both ordered and writeback modes. 177b1e71b06SSteven Whitehouse */ 17845138990SSteven Whitehouse static int gfs2_writepages(struct address_space *mapping, 179b1e71b06SSteven Whitehouse struct writeback_control *wbc) 180b1e71b06SSteven Whitehouse { 181b066a4eeSAbhi Das struct gfs2_sbd *sdp = gfs2_mapping2sbd(mapping); 1822164f9b9SChristoph Hellwig struct iomap_writepage_ctx wpc = { }; 1832164f9b9SChristoph Hellwig int ret; 184b066a4eeSAbhi Das 185b066a4eeSAbhi Das /* 186b066a4eeSAbhi Das * Even if we didn't write any pages here, we might still be holding 187b066a4eeSAbhi Das * dirty pages in the ail. We forcibly flush the ail because we don't 188b066a4eeSAbhi Das * want balance_dirty_pages() to loop indefinitely trying to write out 189b066a4eeSAbhi Das * pages held in the ail that it can't find. 190b066a4eeSAbhi Das */ 1912164f9b9SChristoph Hellwig ret = iomap_writepages(mapping, wbc, &wpc, &gfs2_writeback_ops); 192b066a4eeSAbhi Das if (ret == 0) 193b066a4eeSAbhi Das set_bit(SDF_FORCE_AIL_FLUSH, &sdp->sd_flags); 194b066a4eeSAbhi Das return ret; 195b1e71b06SSteven Whitehouse } 196b1e71b06SSteven Whitehouse 197b1e71b06SSteven Whitehouse /** 19887ed37e6SVishal Moola (Oracle) * gfs2_write_jdata_batch - Write back a folio batch's worth of folios 199b1e71b06SSteven Whitehouse * @mapping: The mapping 200b1e71b06SSteven Whitehouse * @wbc: The writeback control 20187ed37e6SVishal Moola (Oracle) * @fbatch: The batch of folios 2021272574bSFabian Frederick * @done_index: Page index 203b1e71b06SSteven Whitehouse * 204b1e71b06SSteven Whitehouse * Returns: non-zero if loop should terminate, zero otherwise 205b1e71b06SSteven Whitehouse */ 206b1e71b06SSteven Whitehouse 20787ed37e6SVishal Moola (Oracle) static int gfs2_write_jdata_batch(struct address_space *mapping, 208b1e71b06SSteven Whitehouse struct writeback_control *wbc, 20987ed37e6SVishal Moola (Oracle) struct folio_batch *fbatch, 210774016b2SSteven Whitehouse pgoff_t *done_index) 211b1e71b06SSteven Whitehouse { 212b1e71b06SSteven Whitehouse struct inode *inode = mapping->host; 213b1e71b06SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 21487ed37e6SVishal Moola (Oracle) unsigned nrblocks; 215b1e71b06SSteven Whitehouse int i; 216b1e71b06SSteven Whitehouse int ret; 21787ed37e6SVishal Moola (Oracle) int nr_pages = 0; 21887ed37e6SVishal Moola (Oracle) int nr_folios = folio_batch_count(fbatch); 21987ed37e6SVishal Moola (Oracle) 22087ed37e6SVishal Moola (Oracle) for (i = 0; i < nr_folios; i++) 22187ed37e6SVishal Moola (Oracle) nr_pages += folio_nr_pages(fbatch->folios[i]); 22287ed37e6SVishal Moola (Oracle) nrblocks = nr_pages * (PAGE_SIZE >> inode->i_blkbits); 223b1e71b06SSteven Whitehouse 224b1e71b06SSteven Whitehouse ret = gfs2_trans_begin(sdp, nrblocks, nrblocks); 225b1e71b06SSteven Whitehouse if (ret < 0) 226b1e71b06SSteven Whitehouse return ret; 227b1e71b06SSteven Whitehouse 22887ed37e6SVishal Moola (Oracle) for (i = 0; i < nr_folios; i++) { 22987ed37e6SVishal Moola (Oracle) struct folio *folio = fbatch->folios[i]; 230b1e71b06SSteven Whitehouse 23187ed37e6SVishal Moola (Oracle) *done_index = folio->index; 232774016b2SSteven Whitehouse 23387ed37e6SVishal Moola (Oracle) folio_lock(folio); 234b1e71b06SSteven Whitehouse 23587ed37e6SVishal Moola (Oracle) if (unlikely(folio->mapping != mapping)) { 236774016b2SSteven Whitehouse continue_unlock: 23787ed37e6SVishal Moola (Oracle) folio_unlock(folio); 238b1e71b06SSteven Whitehouse continue; 239b1e71b06SSteven Whitehouse } 240b1e71b06SSteven Whitehouse 24187ed37e6SVishal Moola (Oracle) if (!folio_test_dirty(folio)) { 242774016b2SSteven Whitehouse /* someone wrote it for us */ 243774016b2SSteven Whitehouse goto continue_unlock; 244b1e71b06SSteven Whitehouse } 245b1e71b06SSteven Whitehouse 24687ed37e6SVishal Moola (Oracle) if (folio_test_writeback(folio)) { 247b1e71b06SSteven Whitehouse if (wbc->sync_mode != WB_SYNC_NONE) 24887ed37e6SVishal Moola (Oracle) folio_wait_writeback(folio); 249774016b2SSteven Whitehouse else 250774016b2SSteven Whitehouse goto continue_unlock; 251b1e71b06SSteven Whitehouse } 252b1e71b06SSteven Whitehouse 25387ed37e6SVishal Moola (Oracle) BUG_ON(folio_test_writeback(folio)); 25487ed37e6SVishal Moola (Oracle) if (!folio_clear_dirty_for_io(folio)) 255774016b2SSteven Whitehouse goto continue_unlock; 256774016b2SSteven Whitehouse 257de1414a6SChristoph Hellwig trace_wbc_writepage(wbc, inode_to_bdi(inode)); 258b1e71b06SSteven Whitehouse 259d0cfcaeeSMatthew Wilcox (Oracle) ret = __gfs2_jdata_write_folio(folio, wbc); 260774016b2SSteven Whitehouse if (unlikely(ret)) { 261774016b2SSteven Whitehouse if (ret == AOP_WRITEPAGE_ACTIVATE) { 26287ed37e6SVishal Moola (Oracle) folio_unlock(folio); 263774016b2SSteven Whitehouse ret = 0; 264774016b2SSteven Whitehouse } else { 265b1e71b06SSteven Whitehouse 266774016b2SSteven Whitehouse /* 267774016b2SSteven Whitehouse * done_index is set past this page, 268774016b2SSteven Whitehouse * so media errors will not choke 269774016b2SSteven Whitehouse * background writeout for the entire 270774016b2SSteven Whitehouse * file. This has consequences for 271774016b2SSteven Whitehouse * range_cyclic semantics (ie. it may 272774016b2SSteven Whitehouse * not be suitable for data integrity 273774016b2SSteven Whitehouse * writeout). 274774016b2SSteven Whitehouse */ 27587ed37e6SVishal Moola (Oracle) *done_index = folio->index + 27687ed37e6SVishal Moola (Oracle) folio_nr_pages(folio); 277b1e71b06SSteven Whitehouse ret = 1; 278774016b2SSteven Whitehouse break; 279774016b2SSteven Whitehouse } 280774016b2SSteven Whitehouse } 281774016b2SSteven Whitehouse 282774016b2SSteven Whitehouse /* 283774016b2SSteven Whitehouse * We stop writing back only if we are not doing 284774016b2SSteven Whitehouse * integrity sync. In case of integrity sync we have to 285774016b2SSteven Whitehouse * keep going until we have written all the pages 286774016b2SSteven Whitehouse * we tagged for writeback prior to entering this loop. 287774016b2SSteven Whitehouse */ 288774016b2SSteven Whitehouse if (--wbc->nr_to_write <= 0 && wbc->sync_mode == WB_SYNC_NONE) { 289774016b2SSteven Whitehouse ret = 1; 290774016b2SSteven Whitehouse break; 291774016b2SSteven Whitehouse } 292774016b2SSteven Whitehouse 293b1e71b06SSteven Whitehouse } 294b1e71b06SSteven Whitehouse gfs2_trans_end(sdp); 295b1e71b06SSteven Whitehouse return ret; 296b1e71b06SSteven Whitehouse } 297b1e71b06SSteven Whitehouse 298b1e71b06SSteven Whitehouse /** 299b1e71b06SSteven Whitehouse * gfs2_write_cache_jdata - Like write_cache_pages but different 300b1e71b06SSteven Whitehouse * @mapping: The mapping to write 301b1e71b06SSteven Whitehouse * @wbc: The writeback control 302b1e71b06SSteven Whitehouse * 303b1e71b06SSteven Whitehouse * The reason that we use our own function here is that we need to 304b1e71b06SSteven Whitehouse * start transactions before we grab page locks. This allows us 305b1e71b06SSteven Whitehouse * to get the ordering right. 306b1e71b06SSteven Whitehouse */ 307b1e71b06SSteven Whitehouse 308b1e71b06SSteven Whitehouse static int gfs2_write_cache_jdata(struct address_space *mapping, 309b1e71b06SSteven Whitehouse struct writeback_control *wbc) 310b1e71b06SSteven Whitehouse { 311b1e71b06SSteven Whitehouse int ret = 0; 312b1e71b06SSteven Whitehouse int done = 0; 31387ed37e6SVishal Moola (Oracle) struct folio_batch fbatch; 31487ed37e6SVishal Moola (Oracle) int nr_folios; 3153f649ab7SKees Cook pgoff_t writeback_index; 316b1e71b06SSteven Whitehouse pgoff_t index; 317b1e71b06SSteven Whitehouse pgoff_t end; 318774016b2SSteven Whitehouse pgoff_t done_index; 319774016b2SSteven Whitehouse int cycled; 320b1e71b06SSteven Whitehouse int range_whole = 0; 32110bbd235SMatthew Wilcox xa_mark_t tag; 322b1e71b06SSteven Whitehouse 32387ed37e6SVishal Moola (Oracle) folio_batch_init(&fbatch); 324b1e71b06SSteven Whitehouse if (wbc->range_cyclic) { 325774016b2SSteven Whitehouse writeback_index = mapping->writeback_index; /* prev offset */ 326774016b2SSteven Whitehouse index = writeback_index; 327774016b2SSteven Whitehouse if (index == 0) 328774016b2SSteven Whitehouse cycled = 1; 329774016b2SSteven Whitehouse else 330774016b2SSteven Whitehouse cycled = 0; 331b1e71b06SSteven Whitehouse end = -1; 332b1e71b06SSteven Whitehouse } else { 33309cbfeafSKirill A. Shutemov index = wbc->range_start >> PAGE_SHIFT; 33409cbfeafSKirill A. Shutemov end = wbc->range_end >> PAGE_SHIFT; 335b1e71b06SSteven Whitehouse if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) 336b1e71b06SSteven Whitehouse range_whole = 1; 337774016b2SSteven Whitehouse cycled = 1; /* ignore range_cyclic tests */ 338b1e71b06SSteven Whitehouse } 339774016b2SSteven Whitehouse if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) 340774016b2SSteven Whitehouse tag = PAGECACHE_TAG_TOWRITE; 341774016b2SSteven Whitehouse else 342774016b2SSteven Whitehouse tag = PAGECACHE_TAG_DIRTY; 343b1e71b06SSteven Whitehouse 344b1e71b06SSteven Whitehouse retry: 345774016b2SSteven Whitehouse if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) 346774016b2SSteven Whitehouse tag_pages_for_writeback(mapping, index, end); 347774016b2SSteven Whitehouse done_index = index; 348774016b2SSteven Whitehouse while (!done && (index <= end)) { 34987ed37e6SVishal Moola (Oracle) nr_folios = filemap_get_folios_tag(mapping, &index, end, 35087ed37e6SVishal Moola (Oracle) tag, &fbatch); 35187ed37e6SVishal Moola (Oracle) if (nr_folios == 0) 352774016b2SSteven Whitehouse break; 353774016b2SSteven Whitehouse 35487ed37e6SVishal Moola (Oracle) ret = gfs2_write_jdata_batch(mapping, wbc, &fbatch, 35587ed37e6SVishal Moola (Oracle) &done_index); 356b1e71b06SSteven Whitehouse if (ret) 357b1e71b06SSteven Whitehouse done = 1; 358b1e71b06SSteven Whitehouse if (ret > 0) 359b1e71b06SSteven Whitehouse ret = 0; 36087ed37e6SVishal Moola (Oracle) folio_batch_release(&fbatch); 361b1e71b06SSteven Whitehouse cond_resched(); 362b1e71b06SSteven Whitehouse } 363b1e71b06SSteven Whitehouse 364774016b2SSteven Whitehouse if (!cycled && !done) { 365b1e71b06SSteven Whitehouse /* 366774016b2SSteven Whitehouse * range_cyclic: 367b1e71b06SSteven Whitehouse * We hit the last page and there is more work to be done: wrap 368b1e71b06SSteven Whitehouse * back to the start of the file 369b1e71b06SSteven Whitehouse */ 370774016b2SSteven Whitehouse cycled = 1; 371b1e71b06SSteven Whitehouse index = 0; 372774016b2SSteven Whitehouse end = writeback_index - 1; 373b1e71b06SSteven Whitehouse goto retry; 374b1e71b06SSteven Whitehouse } 375b1e71b06SSteven Whitehouse 376b1e71b06SSteven Whitehouse if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) 377774016b2SSteven Whitehouse mapping->writeback_index = done_index; 378774016b2SSteven Whitehouse 379b1e71b06SSteven Whitehouse return ret; 380b1e71b06SSteven Whitehouse } 381b1e71b06SSteven Whitehouse 382b1e71b06SSteven Whitehouse 383b1e71b06SSteven Whitehouse /** 384b1e71b06SSteven Whitehouse * gfs2_jdata_writepages - Write a bunch of dirty pages back to disk 385b1e71b06SSteven Whitehouse * @mapping: The mapping to write 386b1e71b06SSteven Whitehouse * @wbc: The writeback control 387b1e71b06SSteven Whitehouse * 388b1e71b06SSteven Whitehouse */ 389b1e71b06SSteven Whitehouse 390b1e71b06SSteven Whitehouse static int gfs2_jdata_writepages(struct address_space *mapping, 391b1e71b06SSteven Whitehouse struct writeback_control *wbc) 392b1e71b06SSteven Whitehouse { 393b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(mapping->host); 394b1e71b06SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(mapping->host); 395b1e71b06SSteven Whitehouse int ret; 396b1e71b06SSteven Whitehouse 397b1e71b06SSteven Whitehouse ret = gfs2_write_cache_jdata(mapping, wbc); 398b1e71b06SSteven Whitehouse if (ret == 0 && wbc->sync_mode == WB_SYNC_ALL) { 399805c0907SBob Peterson gfs2_log_flush(sdp, ip->i_gl, GFS2_LOG_HEAD_FLUSH_NORMAL | 400805c0907SBob Peterson GFS2_LFC_JDATA_WPAGES); 401b1e71b06SSteven Whitehouse ret = gfs2_write_cache_jdata(mapping, wbc); 402b1e71b06SSteven Whitehouse } 403b1e71b06SSteven Whitehouse return ret; 404b1e71b06SSteven Whitehouse } 405b1e71b06SSteven Whitehouse 406b1e71b06SSteven Whitehouse /** 407b1e71b06SSteven Whitehouse * stuffed_readpage - Fill in a Linux page with stuffed file data 408b1e71b06SSteven Whitehouse * @ip: the inode 409b1e71b06SSteven Whitehouse * @page: the page 410b1e71b06SSteven Whitehouse * 411b1e71b06SSteven Whitehouse * Returns: errno 412b1e71b06SSteven Whitehouse */ 413378b6cbfSChristoph Hellwig static int stuffed_readpage(struct gfs2_inode *ip, struct page *page) 414b1e71b06SSteven Whitehouse { 415b1e71b06SSteven Whitehouse struct buffer_head *dibh; 416602c89d2SSteven Whitehouse u64 dsize = i_size_read(&ip->i_inode); 417b1e71b06SSteven Whitehouse void *kaddr; 418b1e71b06SSteven Whitehouse int error; 419b1e71b06SSteven Whitehouse 420b1e71b06SSteven Whitehouse /* 421b1e71b06SSteven Whitehouse * Due to the order of unstuffing files and ->fault(), we can be 422b1e71b06SSteven Whitehouse * asked for a zero page in the case of a stuffed file being extended, 423b1e71b06SSteven Whitehouse * so we need to supply one here. It doesn't happen often. 424b1e71b06SSteven Whitehouse */ 425b1e71b06SSteven Whitehouse if (unlikely(page->index)) { 42609cbfeafSKirill A. Shutemov zero_user(page, 0, PAGE_SIZE); 427b1e71b06SSteven Whitehouse SetPageUptodate(page); 428b1e71b06SSteven Whitehouse return 0; 429b1e71b06SSteven Whitehouse } 430b1e71b06SSteven Whitehouse 431b1e71b06SSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 432b1e71b06SSteven Whitehouse if (error) 433b1e71b06SSteven Whitehouse return error; 434b1e71b06SSteven Whitehouse 43558721bd4SDeepak R Varma kaddr = kmap_local_page(page); 436602c89d2SSteven Whitehouse memcpy(kaddr, dibh->b_data + sizeof(struct gfs2_dinode), dsize); 43709cbfeafSKirill A. Shutemov memset(kaddr + dsize, 0, PAGE_SIZE - dsize); 43858721bd4SDeepak R Varma kunmap_local(kaddr); 439b1e71b06SSteven Whitehouse flush_dcache_page(page); 440b1e71b06SSteven Whitehouse brelse(dibh); 441b1e71b06SSteven Whitehouse SetPageUptodate(page); 442b1e71b06SSteven Whitehouse 443b1e71b06SSteven Whitehouse return 0; 444b1e71b06SSteven Whitehouse } 445b1e71b06SSteven Whitehouse 446e9b5b23eSMatthew Wilcox (Oracle) /** 447e9b5b23eSMatthew Wilcox (Oracle) * gfs2_read_folio - read a folio from a file 448e9b5b23eSMatthew Wilcox (Oracle) * @file: The file to read 449e9b5b23eSMatthew Wilcox (Oracle) * @folio: The folio in the file 450e9b5b23eSMatthew Wilcox (Oracle) */ 451e9b5b23eSMatthew Wilcox (Oracle) static int gfs2_read_folio(struct file *file, struct folio *folio) 452b1e71b06SSteven Whitehouse { 453e9b5b23eSMatthew Wilcox (Oracle) struct inode *inode = folio->mapping->host; 4542164f9b9SChristoph Hellwig struct gfs2_inode *ip = GFS2_I(inode); 4552164f9b9SChristoph Hellwig struct gfs2_sbd *sdp = GFS2_SB(inode); 456b1e71b06SSteven Whitehouse int error; 457b1e71b06SSteven Whitehouse 4582164f9b9SChristoph Hellwig if (!gfs2_is_jdata(ip) || 459e9b5b23eSMatthew Wilcox (Oracle) (i_blocksize(inode) == PAGE_SIZE && !folio_buffers(folio))) { 4607479c505SMatthew Wilcox (Oracle) error = iomap_read_folio(folio, &gfs2_iomap_ops); 461f95cbb44SAndreas Gruenbacher } else if (gfs2_is_stuffed(ip)) { 462e9b5b23eSMatthew Wilcox (Oracle) error = stuffed_readpage(ip, &folio->page); 463e9b5b23eSMatthew Wilcox (Oracle) folio_unlock(folio); 464b1e71b06SSteven Whitehouse } else { 465f132ab7dSMatthew Wilcox (Oracle) error = mpage_read_folio(folio, gfs2_block_map); 466b1e71b06SSteven Whitehouse } 467b1e71b06SSteven Whitehouse 468eb43e660SBob Peterson if (unlikely(gfs2_withdrawn(sdp))) 469b1e71b06SSteven Whitehouse return -EIO; 470b1e71b06SSteven Whitehouse 471b1e71b06SSteven Whitehouse return error; 472b1e71b06SSteven Whitehouse } 473b1e71b06SSteven Whitehouse 474b1e71b06SSteven Whitehouse /** 475b1e71b06SSteven Whitehouse * gfs2_internal_read - read an internal file 476b1e71b06SSteven Whitehouse * @ip: The gfs2 inode 477b1e71b06SSteven Whitehouse * @buf: The buffer to fill 478b1e71b06SSteven Whitehouse * @pos: The file position 479b1e71b06SSteven Whitehouse * @size: The amount to read 480b1e71b06SSteven Whitehouse * 481b1e71b06SSteven Whitehouse */ 482b1e71b06SSteven Whitehouse 4834306629eSAndrew Price int gfs2_internal_read(struct gfs2_inode *ip, char *buf, loff_t *pos, 4844306629eSAndrew Price unsigned size) 485b1e71b06SSteven Whitehouse { 486b1e71b06SSteven Whitehouse struct address_space *mapping = ip->i_inode.i_mapping; 48745eb0504SAndreas Gruenbacher unsigned long index = *pos >> PAGE_SHIFT; 48809cbfeafSKirill A. Shutemov unsigned offset = *pos & (PAGE_SIZE - 1); 489b1e71b06SSteven Whitehouse unsigned copied = 0; 490b1e71b06SSteven Whitehouse unsigned amt; 491b1e71b06SSteven Whitehouse struct page *page; 492b1e71b06SSteven Whitehouse 493b1e71b06SSteven Whitehouse do { 494cea44032SAndreas Gruenbacher page = read_cache_page(mapping, index, gfs2_read_folio, NULL); 495cea44032SAndreas Gruenbacher if (IS_ERR(page)) { 496cea44032SAndreas Gruenbacher if (PTR_ERR(page) == -EINTR) 497cea44032SAndreas Gruenbacher continue; 498cea44032SAndreas Gruenbacher return PTR_ERR(page); 499cea44032SAndreas Gruenbacher } 500b1e71b06SSteven Whitehouse amt = size - copied; 50109cbfeafSKirill A. Shutemov if (offset + size > PAGE_SIZE) 50209cbfeafSKirill A. Shutemov amt = PAGE_SIZE - offset; 503d68d0c6cSAndreas Gruenbacher memcpy_from_page(buf + copied, page, offset, amt); 50409cbfeafSKirill A. Shutemov put_page(page); 505b1e71b06SSteven Whitehouse copied += amt; 506b1e71b06SSteven Whitehouse index++; 507b1e71b06SSteven Whitehouse offset = 0; 508b1e71b06SSteven Whitehouse } while(copied < size); 509b1e71b06SSteven Whitehouse (*pos) += size; 510b1e71b06SSteven Whitehouse return size; 511b1e71b06SSteven Whitehouse } 512b1e71b06SSteven Whitehouse 513b1e71b06SSteven Whitehouse /** 514d4388340SMatthew Wilcox (Oracle) * gfs2_readahead - Read a bunch of pages at once 515c551f66cSLee Jones * @rac: Read-ahead control structure 516b1e71b06SSteven Whitehouse * 517b1e71b06SSteven Whitehouse * Some notes: 518b1e71b06SSteven Whitehouse * 1. This is only for readahead, so we can simply ignore any things 519b1e71b06SSteven Whitehouse * which are slightly inconvenient (such as locking conflicts between 520b1e71b06SSteven Whitehouse * the page lock and the glock) and return having done no I/O. Its 521b1e71b06SSteven Whitehouse * obviously not something we'd want to do on too regular a basis. 522b1e71b06SSteven Whitehouse * Any I/O we ignore at this time will be done via readpage later. 523b1e71b06SSteven Whitehouse * 2. We don't handle stuffed files here we let readpage do the honours. 524d4388340SMatthew Wilcox (Oracle) * 3. mpage_readahead() does most of the heavy lifting in the common case. 525b1e71b06SSteven Whitehouse * 4. gfs2_block_map() is relied upon to set BH_Boundary in the right places. 526b1e71b06SSteven Whitehouse */ 527b1e71b06SSteven Whitehouse 528d4388340SMatthew Wilcox (Oracle) static void gfs2_readahead(struct readahead_control *rac) 529b1e71b06SSteven Whitehouse { 530d4388340SMatthew Wilcox (Oracle) struct inode *inode = rac->mapping->host; 531b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 532b1e71b06SSteven Whitehouse 5332164f9b9SChristoph Hellwig if (gfs2_is_stuffed(ip)) 5342164f9b9SChristoph Hellwig ; 5352164f9b9SChristoph Hellwig else if (gfs2_is_jdata(ip)) 536d4388340SMatthew Wilcox (Oracle) mpage_readahead(rac, gfs2_block_map); 5372164f9b9SChristoph Hellwig else 5382164f9b9SChristoph Hellwig iomap_readahead(rac, &gfs2_iomap_ops); 539b1e71b06SSteven Whitehouse } 540b1e71b06SSteven Whitehouse 541b1e71b06SSteven Whitehouse /** 542b1e71b06SSteven Whitehouse * adjust_fs_space - Adjusts the free space available due to gfs2_grow 543b1e71b06SSteven Whitehouse * @inode: the rindex inode 544b1e71b06SSteven Whitehouse */ 54564bc06bbSAndreas Gruenbacher void adjust_fs_space(struct inode *inode) 546b1e71b06SSteven Whitehouse { 547d0a22a4bSAndreas Gruenbacher struct gfs2_sbd *sdp = GFS2_SB(inode); 5481946f70aSBenjamin Marzinski struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 549b1e71b06SSteven Whitehouse struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 550b1e71b06SSteven Whitehouse struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 55170c11ba8SBob Peterson struct buffer_head *m_bh; 552b1e71b06SSteven Whitehouse u64 fs_total, new_free; 553b1e71b06SSteven Whitehouse 554d0a22a4bSAndreas Gruenbacher if (gfs2_trans_begin(sdp, 2 * RES_STATFS, 0) != 0) 555d0a22a4bSAndreas Gruenbacher return; 556d0a22a4bSAndreas Gruenbacher 557b1e71b06SSteven Whitehouse /* Total up the file system space, according to the latest rindex. */ 558b1e71b06SSteven Whitehouse fs_total = gfs2_ri_total(sdp); 5591946f70aSBenjamin Marzinski if (gfs2_meta_inode_buffer(m_ip, &m_bh) != 0) 560d0a22a4bSAndreas Gruenbacher goto out; 561b1e71b06SSteven Whitehouse 562b1e71b06SSteven Whitehouse spin_lock(&sdp->sd_statfs_spin); 5631946f70aSBenjamin Marzinski gfs2_statfs_change_in(m_sc, m_bh->b_data + 5641946f70aSBenjamin Marzinski sizeof(struct gfs2_dinode)); 565b1e71b06SSteven Whitehouse if (fs_total > (m_sc->sc_total + l_sc->sc_total)) 566b1e71b06SSteven Whitehouse new_free = fs_total - (m_sc->sc_total + l_sc->sc_total); 567b1e71b06SSteven Whitehouse else 568b1e71b06SSteven Whitehouse new_free = 0; 569b1e71b06SSteven Whitehouse spin_unlock(&sdp->sd_statfs_spin); 570b1e71b06SSteven Whitehouse fs_warn(sdp, "File system extended by %llu blocks.\n", 571b1e71b06SSteven Whitehouse (unsigned long long)new_free); 572b1e71b06SSteven Whitehouse gfs2_statfs_change(sdp, new_free, new_free, 0); 5731946f70aSBenjamin Marzinski 57470c11ba8SBob Peterson update_statfs(sdp, m_bh); 5751946f70aSBenjamin Marzinski brelse(m_bh); 576d0a22a4bSAndreas Gruenbacher out: 577d0a22a4bSAndreas Gruenbacher sdp->sd_rindex_uptodate = 0; 578d0a22a4bSAndreas Gruenbacher gfs2_trans_end(sdp); 579b1e71b06SSteven Whitehouse } 580b1e71b06SSteven Whitehouse 581e621900aSMatthew Wilcox (Oracle) static bool jdata_dirty_folio(struct address_space *mapping, 582e621900aSMatthew Wilcox (Oracle) struct folio *folio) 583b1e71b06SSteven Whitehouse { 5846302d6f4SBob Peterson if (current->journal_info) 585e621900aSMatthew Wilcox (Oracle) folio_set_checked(folio); 586e621900aSMatthew Wilcox (Oracle) return block_dirty_folio(mapping, folio); 587b1e71b06SSteven Whitehouse } 588b1e71b06SSteven Whitehouse 589b1e71b06SSteven Whitehouse /** 590b1e71b06SSteven Whitehouse * gfs2_bmap - Block map function 591b1e71b06SSteven Whitehouse * @mapping: Address space info 592b1e71b06SSteven Whitehouse * @lblock: The block to map 593b1e71b06SSteven Whitehouse * 594b1e71b06SSteven Whitehouse * Returns: The disk address for the block or 0 on hole or error 595b1e71b06SSteven Whitehouse */ 596b1e71b06SSteven Whitehouse 597b1e71b06SSteven Whitehouse static sector_t gfs2_bmap(struct address_space *mapping, sector_t lblock) 598b1e71b06SSteven Whitehouse { 599b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(mapping->host); 600b1e71b06SSteven Whitehouse struct gfs2_holder i_gh; 601b1e71b06SSteven Whitehouse sector_t dblock = 0; 602b1e71b06SSteven Whitehouse int error; 603b1e71b06SSteven Whitehouse 604b1e71b06SSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 605b1e71b06SSteven Whitehouse if (error) 606b1e71b06SSteven Whitehouse return 0; 607b1e71b06SSteven Whitehouse 608b1e71b06SSteven Whitehouse if (!gfs2_is_stuffed(ip)) 6097770c93aSChristoph Hellwig dblock = iomap_bmap(mapping, lblock, &gfs2_iomap_ops); 610b1e71b06SSteven Whitehouse 611b1e71b06SSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 612b1e71b06SSteven Whitehouse 613b1e71b06SSteven Whitehouse return dblock; 614b1e71b06SSteven Whitehouse } 615b1e71b06SSteven Whitehouse 616b1e71b06SSteven Whitehouse static void gfs2_discard(struct gfs2_sbd *sdp, struct buffer_head *bh) 617b1e71b06SSteven Whitehouse { 618b1e71b06SSteven Whitehouse struct gfs2_bufdata *bd; 619b1e71b06SSteven Whitehouse 620b1e71b06SSteven Whitehouse lock_buffer(bh); 621b1e71b06SSteven Whitehouse gfs2_log_lock(sdp); 622b1e71b06SSteven Whitehouse clear_buffer_dirty(bh); 623b1e71b06SSteven Whitehouse bd = bh->b_private; 624b1e71b06SSteven Whitehouse if (bd) { 625c0752aa7SBob Peterson if (!list_empty(&bd->bd_list) && !buffer_pinned(bh)) 626c0752aa7SBob Peterson list_del_init(&bd->bd_list); 62768942870SBob Peterson else { 62868942870SBob Peterson spin_lock(&sdp->sd_ail_lock); 62968cd4ce2SBob Peterson gfs2_remove_from_journal(bh, REMOVE_JDATA); 63068942870SBob Peterson spin_unlock(&sdp->sd_ail_lock); 63168942870SBob Peterson } 632b1e71b06SSteven Whitehouse } 633b1e71b06SSteven Whitehouse bh->b_bdev = NULL; 634b1e71b06SSteven Whitehouse clear_buffer_mapped(bh); 635b1e71b06SSteven Whitehouse clear_buffer_req(bh); 636b1e71b06SSteven Whitehouse clear_buffer_new(bh); 637b1e71b06SSteven Whitehouse gfs2_log_unlock(sdp); 638b1e71b06SSteven Whitehouse unlock_buffer(bh); 639b1e71b06SSteven Whitehouse } 640b1e71b06SSteven Whitehouse 6415f4b2976SMatthew Wilcox (Oracle) static void gfs2_invalidate_folio(struct folio *folio, size_t offset, 6425f4b2976SMatthew Wilcox (Oracle) size_t length) 643b1e71b06SSteven Whitehouse { 6445f4b2976SMatthew Wilcox (Oracle) struct gfs2_sbd *sdp = GFS2_SB(folio->mapping->host); 6455f4b2976SMatthew Wilcox (Oracle) size_t stop = offset + length; 6465f4b2976SMatthew Wilcox (Oracle) int partial_page = (offset || length < folio_size(folio)); 647b1e71b06SSteven Whitehouse struct buffer_head *bh, *head; 648b1e71b06SSteven Whitehouse unsigned long pos = 0; 649b1e71b06SSteven Whitehouse 6505f4b2976SMatthew Wilcox (Oracle) BUG_ON(!folio_test_locked(folio)); 6515c0bb97cSLukas Czerner if (!partial_page) 6525f4b2976SMatthew Wilcox (Oracle) folio_clear_checked(folio); 6535f4b2976SMatthew Wilcox (Oracle) head = folio_buffers(folio); 6545f4b2976SMatthew Wilcox (Oracle) if (!head) 655b1e71b06SSteven Whitehouse goto out; 656b1e71b06SSteven Whitehouse 6575f4b2976SMatthew Wilcox (Oracle) bh = head; 658b1e71b06SSteven Whitehouse do { 6595c0bb97cSLukas Czerner if (pos + bh->b_size > stop) 6605c0bb97cSLukas Czerner return; 6615c0bb97cSLukas Czerner 662b1e71b06SSteven Whitehouse if (offset <= pos) 663b1e71b06SSteven Whitehouse gfs2_discard(sdp, bh); 664b1e71b06SSteven Whitehouse pos += bh->b_size; 665b1e71b06SSteven Whitehouse bh = bh->b_this_page; 666b1e71b06SSteven Whitehouse } while (bh != head); 667b1e71b06SSteven Whitehouse out: 6685c0bb97cSLukas Czerner if (!partial_page) 6695f4b2976SMatthew Wilcox (Oracle) filemap_release_folio(folio, 0); 670b1e71b06SSteven Whitehouse } 671b1e71b06SSteven Whitehouse 672b1e71b06SSteven Whitehouse /** 673e45c20d1SMatthew Wilcox (Oracle) * gfs2_release_folio - free the metadata associated with a folio 674e45c20d1SMatthew Wilcox (Oracle) * @folio: the folio that's being released 675b1e71b06SSteven Whitehouse * @gfp_mask: passed from Linux VFS, ignored by us 676b1e71b06SSteven Whitehouse * 677e45c20d1SMatthew Wilcox (Oracle) * Calls try_to_free_buffers() to free the buffers and put the folio if the 6780ebbe4f9SAndreas Gruenbacher * buffers can be released. 679b1e71b06SSteven Whitehouse * 680e45c20d1SMatthew Wilcox (Oracle) * Returns: true if the folio was put or else false 681b1e71b06SSteven Whitehouse */ 682b1e71b06SSteven Whitehouse 683e45c20d1SMatthew Wilcox (Oracle) bool gfs2_release_folio(struct folio *folio, gfp_t gfp_mask) 684b1e71b06SSteven Whitehouse { 685e45c20d1SMatthew Wilcox (Oracle) struct address_space *mapping = folio->mapping; 686009d8518SSteven Whitehouse struct gfs2_sbd *sdp = gfs2_mapping2sbd(mapping); 687b1e71b06SSteven Whitehouse struct buffer_head *bh, *head; 688b1e71b06SSteven Whitehouse struct gfs2_bufdata *bd; 689b1e71b06SSteven Whitehouse 690e45c20d1SMatthew Wilcox (Oracle) head = folio_buffers(folio); 691e45c20d1SMatthew Wilcox (Oracle) if (!head) 692e45c20d1SMatthew Wilcox (Oracle) return false; 693b1e71b06SSteven Whitehouse 6941c185c02SAndreas Gruenbacher /* 695e45c20d1SMatthew Wilcox (Oracle) * mm accommodates an old ext3 case where clean folios might 696e45c20d1SMatthew Wilcox (Oracle) * not have had the dirty bit cleared. Thus, it can send actual 697e45c20d1SMatthew Wilcox (Oracle) * dirty folios to ->release_folio() via shrink_active_list(). 6981c185c02SAndreas Gruenbacher * 699e45c20d1SMatthew Wilcox (Oracle) * As a workaround, we skip folios that contain dirty buffers 700e45c20d1SMatthew Wilcox (Oracle) * below. Once ->release_folio isn't called on dirty folios 701e45c20d1SMatthew Wilcox (Oracle) * anymore, we can warn on dirty buffers like we used to here 702e45c20d1SMatthew Wilcox (Oracle) * again. 7031c185c02SAndreas Gruenbacher */ 7041c185c02SAndreas Gruenbacher 705b1e71b06SSteven Whitehouse gfs2_log_lock(sdp); 706e45c20d1SMatthew Wilcox (Oracle) bh = head; 707b1e71b06SSteven Whitehouse do { 708b1e71b06SSteven Whitehouse if (atomic_read(&bh->b_count)) 709b1e71b06SSteven Whitehouse goto cannot_release; 710b1e71b06SSteven Whitehouse bd = bh->b_private; 71116ca9412SBenjamin Marzinski if (bd && bd->bd_tr) 712b1e71b06SSteven Whitehouse goto cannot_release; 7131c185c02SAndreas Gruenbacher if (buffer_dirty(bh) || WARN_ON(buffer_pinned(bh))) 7141c185c02SAndreas Gruenbacher goto cannot_release; 715b1e71b06SSteven Whitehouse bh = bh->b_this_page; 716b1e71b06SSteven Whitehouse } while (bh != head); 717b1e71b06SSteven Whitehouse 718e45c20d1SMatthew Wilcox (Oracle) bh = head; 719b1e71b06SSteven Whitehouse do { 720b1e71b06SSteven Whitehouse bd = bh->b_private; 721b1e71b06SSteven Whitehouse if (bd) { 722b1e71b06SSteven Whitehouse gfs2_assert_warn(sdp, bd->bd_bh == bh); 723b1e71b06SSteven Whitehouse bd->bd_bh = NULL; 724b1e71b06SSteven Whitehouse bh->b_private = NULL; 725019dd669SBob Peterson /* 726019dd669SBob Peterson * The bd may still be queued as a revoke, in which 727019dd669SBob Peterson * case we must not dequeue nor free it. 728019dd669SBob Peterson */ 729019dd669SBob Peterson if (!bd->bd_blkno && !list_empty(&bd->bd_list)) 730019dd669SBob Peterson list_del_init(&bd->bd_list); 731019dd669SBob Peterson if (list_empty(&bd->bd_list)) 732b1e71b06SSteven Whitehouse kmem_cache_free(gfs2_bufdata_cachep, bd); 733e4f29206SSteven Whitehouse } 734b1e71b06SSteven Whitehouse 735b1e71b06SSteven Whitehouse bh = bh->b_this_page; 736b1e71b06SSteven Whitehouse } while (bh != head); 737e4f29206SSteven Whitehouse gfs2_log_unlock(sdp); 738b1e71b06SSteven Whitehouse 73968189fefSMatthew Wilcox (Oracle) return try_to_free_buffers(folio); 7408f065d36SSteven Whitehouse 741b1e71b06SSteven Whitehouse cannot_release: 742b1e71b06SSteven Whitehouse gfs2_log_unlock(sdp); 743e45c20d1SMatthew Wilcox (Oracle) return false; 744b1e71b06SSteven Whitehouse } 745b1e71b06SSteven Whitehouse 746eadd7535SChristoph Hellwig static const struct address_space_operations gfs2_aops = { 74745138990SSteven Whitehouse .writepages = gfs2_writepages, 748f132ab7dSMatthew Wilcox (Oracle) .read_folio = gfs2_read_folio, 749d4388340SMatthew Wilcox (Oracle) .readahead = gfs2_readahead, 750*4ce02c67SRitesh Harjani (IBM) .dirty_folio = iomap_dirty_folio, 7518597447dSMatthew Wilcox (Oracle) .release_folio = iomap_release_folio, 752d82354f6SMatthew Wilcox (Oracle) .invalidate_folio = iomap_invalidate_folio, 753b1e71b06SSteven Whitehouse .bmap = gfs2_bmap, 7542ec810d5SMatthew Wilcox (Oracle) .migrate_folio = filemap_migrate_folio, 7552164f9b9SChristoph Hellwig .is_partially_uptodate = iomap_is_partially_uptodate, 756aa261f54SAndi Kleen .error_remove_page = generic_error_remove_page, 757b1e71b06SSteven Whitehouse }; 758b1e71b06SSteven Whitehouse 759b1e71b06SSteven Whitehouse static const struct address_space_operations gfs2_jdata_aops = { 760b1e71b06SSteven Whitehouse .writepage = gfs2_jdata_writepage, 761b1e71b06SSteven Whitehouse .writepages = gfs2_jdata_writepages, 762f132ab7dSMatthew Wilcox (Oracle) .read_folio = gfs2_read_folio, 763d4388340SMatthew Wilcox (Oracle) .readahead = gfs2_readahead, 764e621900aSMatthew Wilcox (Oracle) .dirty_folio = jdata_dirty_folio, 765b1e71b06SSteven Whitehouse .bmap = gfs2_bmap, 7665f4b2976SMatthew Wilcox (Oracle) .invalidate_folio = gfs2_invalidate_folio, 767e45c20d1SMatthew Wilcox (Oracle) .release_folio = gfs2_release_folio, 768b1e71b06SSteven Whitehouse .is_partially_uptodate = block_is_partially_uptodate, 769aa261f54SAndi Kleen .error_remove_page = generic_error_remove_page, 770b1e71b06SSteven Whitehouse }; 771b1e71b06SSteven Whitehouse 772b1e71b06SSteven Whitehouse void gfs2_set_aops(struct inode *inode) 773b1e71b06SSteven Whitehouse { 774eadd7535SChristoph Hellwig if (gfs2_is_jdata(GFS2_I(inode))) 775b1e71b06SSteven Whitehouse inode->i_mapping->a_ops = &gfs2_jdata_aops; 776b1e71b06SSteven Whitehouse else 777eadd7535SChristoph Hellwig inode->i_mapping->a_ops = &gfs2_aops; 778b1e71b06SSteven Whitehouse } 779