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 4064bc06bbSAndreas Gruenbacher void gfs2_page_add_databufs(struct gfs2_inode *ip, struct page *page, 4188b65ce5SAndreas Gruenbacher unsigned int from, unsigned int len) 42b1e71b06SSteven Whitehouse { 43b1e71b06SSteven Whitehouse struct buffer_head *head = page_buffers(page); 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 /** 8559c01c50SChristoph Hellwig * gfs2_writepage - Write page for writeback mappings 8659c01c50SChristoph Hellwig * @page: The page 87b1e71b06SSteven Whitehouse * @wbc: The writeback control 88b1e71b06SSteven Whitehouse */ 8959c01c50SChristoph Hellwig static int gfs2_writepage(struct page *page, struct writeback_control *wbc) 90b1e71b06SSteven Whitehouse { 91b1e71b06SSteven Whitehouse struct inode *inode = page->mapping->host; 92b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 93b1e71b06SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 942164f9b9SChristoph Hellwig struct iomap_writepage_ctx wpc = { }; 95b1e71b06SSteven Whitehouse 96b1e71b06SSteven Whitehouse if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(ip->i_gl))) 97b1e71b06SSteven Whitehouse goto out; 98b1e71b06SSteven Whitehouse if (current->journal_info) 99b1e71b06SSteven Whitehouse goto redirty; 1002164f9b9SChristoph Hellwig return iomap_writepage(page, wbc, &wpc, &gfs2_writeback_ops); 10159c01c50SChristoph Hellwig 102b1e71b06SSteven Whitehouse redirty: 103b1e71b06SSteven Whitehouse redirty_page_for_writepage(wbc, page); 104b1e71b06SSteven Whitehouse out: 105b1e71b06SSteven Whitehouse unlock_page(page); 106b1e71b06SSteven Whitehouse return 0; 107b1e71b06SSteven Whitehouse } 108b1e71b06SSteven Whitehouse 10921b6924bSBob Peterson /** 11021b6924bSBob Peterson * gfs2_write_jdata_page - gfs2 jdata-specific version of block_write_full_page 11121b6924bSBob Peterson * @page: The page to write 11221b6924bSBob Peterson * @wbc: The writeback control 11321b6924bSBob Peterson * 11421b6924bSBob Peterson * This is the same as calling block_write_full_page, but it also 115fd4c5748SBenjamin Marzinski * writes pages outside of i_size 116fd4c5748SBenjamin Marzinski */ 11721b6924bSBob Peterson static int gfs2_write_jdata_page(struct page *page, 118fd4c5748SBenjamin Marzinski struct writeback_control *wbc) 119fd4c5748SBenjamin Marzinski { 120fd4c5748SBenjamin Marzinski struct inode * const inode = page->mapping->host; 121fd4c5748SBenjamin Marzinski loff_t i_size = i_size_read(inode); 122fd4c5748SBenjamin Marzinski const pgoff_t end_index = i_size >> PAGE_SHIFT; 123fd4c5748SBenjamin Marzinski unsigned offset; 124fd4c5748SBenjamin Marzinski 125fd4c5748SBenjamin Marzinski /* 126fd4c5748SBenjamin Marzinski * The page straddles i_size. It must be zeroed out on each and every 127fd4c5748SBenjamin Marzinski * writepage invocation because it may be mmapped. "A file is mapped 128fd4c5748SBenjamin Marzinski * in multiples of the page size. For a file that is not a multiple of 129fd4c5748SBenjamin Marzinski * the page size, the remaining memory is zeroed when mapped, and 130fd4c5748SBenjamin Marzinski * writes to that region are not written out to the file." 131fd4c5748SBenjamin Marzinski */ 132fd4c5748SBenjamin Marzinski offset = i_size & (PAGE_SIZE - 1); 133fd4c5748SBenjamin Marzinski if (page->index == end_index && offset) 134fd4c5748SBenjamin Marzinski zero_user_segment(page, offset, PAGE_SIZE); 135fd4c5748SBenjamin Marzinski 13621b6924bSBob Peterson return __block_write_full_page(inode, page, gfs2_get_block_noalloc, wbc, 137fd4c5748SBenjamin Marzinski end_buffer_async_write); 138fd4c5748SBenjamin Marzinski } 139fd4c5748SBenjamin Marzinski 140b1e71b06SSteven Whitehouse /** 141b1e71b06SSteven Whitehouse * __gfs2_jdata_writepage - The core of jdata writepage 142b1e71b06SSteven Whitehouse * @page: The page to write 143b1e71b06SSteven Whitehouse * @wbc: The writeback control 144b1e71b06SSteven Whitehouse * 145b1e71b06SSteven Whitehouse * This is shared between writepage and writepages and implements the 146b1e71b06SSteven Whitehouse * core of the writepage operation. If a transaction is required then 147b1e71b06SSteven Whitehouse * PageChecked will have been set and the transaction will have 148b1e71b06SSteven Whitehouse * already been started before this is called. 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; 154b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 155b1e71b06SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 156b1e71b06SSteven Whitehouse 157b1e71b06SSteven Whitehouse if (PageChecked(page)) { 158b1e71b06SSteven Whitehouse ClearPageChecked(page); 159b1e71b06SSteven Whitehouse if (!page_has_buffers(page)) { 160b1e71b06SSteven Whitehouse create_empty_buffers(page, inode->i_sb->s_blocksize, 16147a9a527SFabian Frederick BIT(BH_Dirty)|BIT(BH_Uptodate)); 162b1e71b06SSteven Whitehouse } 16388b65ce5SAndreas Gruenbacher gfs2_page_add_databufs(ip, page, 0, sdp->sd_vfs->s_blocksize); 164b1e71b06SSteven Whitehouse } 16521b6924bSBob Peterson return gfs2_write_jdata_page(page, wbc); 166b1e71b06SSteven Whitehouse } 167b1e71b06SSteven Whitehouse 168b1e71b06SSteven Whitehouse /** 169b1e71b06SSteven Whitehouse * gfs2_jdata_writepage - Write complete page 170b1e71b06SSteven Whitehouse * @page: Page to write 1711272574bSFabian Frederick * @wbc: The writeback control 172b1e71b06SSteven Whitehouse * 173b1e71b06SSteven Whitehouse * Returns: errno 174b1e71b06SSteven Whitehouse * 175b1e71b06SSteven Whitehouse */ 176b1e71b06SSteven Whitehouse 177b1e71b06SSteven Whitehouse static int gfs2_jdata_writepage(struct page *page, struct writeback_control *wbc) 178b1e71b06SSteven Whitehouse { 179b1e71b06SSteven Whitehouse struct inode *inode = page->mapping->host; 180fd4c5748SBenjamin Marzinski struct gfs2_inode *ip = GFS2_I(inode); 181b1e71b06SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 182b1e71b06SSteven Whitehouse 183fd4c5748SBenjamin Marzinski if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(ip->i_gl))) 184fd4c5748SBenjamin Marzinski goto out; 185fd4c5748SBenjamin Marzinski if (PageChecked(page) || current->journal_info) 186b1e71b06SSteven Whitehouse goto out_ignore; 187e556280dSBob Peterson return __gfs2_jdata_writepage(page, wbc); 188b1e71b06SSteven Whitehouse 189b1e71b06SSteven Whitehouse out_ignore: 190b1e71b06SSteven Whitehouse redirty_page_for_writepage(wbc, page); 191fd4c5748SBenjamin Marzinski out: 192b1e71b06SSteven Whitehouse unlock_page(page); 193b1e71b06SSteven Whitehouse return 0; 194b1e71b06SSteven Whitehouse } 195b1e71b06SSteven Whitehouse 196b1e71b06SSteven Whitehouse /** 19745138990SSteven Whitehouse * gfs2_writepages - Write a bunch of dirty pages back to disk 198b1e71b06SSteven Whitehouse * @mapping: The mapping to write 199b1e71b06SSteven Whitehouse * @wbc: Write-back control 200b1e71b06SSteven Whitehouse * 20145138990SSteven Whitehouse * Used for both ordered and writeback modes. 202b1e71b06SSteven Whitehouse */ 20345138990SSteven Whitehouse static int gfs2_writepages(struct address_space *mapping, 204b1e71b06SSteven Whitehouse struct writeback_control *wbc) 205b1e71b06SSteven Whitehouse { 206b066a4eeSAbhi Das struct gfs2_sbd *sdp = gfs2_mapping2sbd(mapping); 2072164f9b9SChristoph Hellwig struct iomap_writepage_ctx wpc = { }; 2082164f9b9SChristoph Hellwig int ret; 209b066a4eeSAbhi Das 210b066a4eeSAbhi Das /* 211b066a4eeSAbhi Das * Even if we didn't write any pages here, we might still be holding 212b066a4eeSAbhi Das * dirty pages in the ail. We forcibly flush the ail because we don't 213b066a4eeSAbhi Das * want balance_dirty_pages() to loop indefinitely trying to write out 214b066a4eeSAbhi Das * pages held in the ail that it can't find. 215b066a4eeSAbhi Das */ 2162164f9b9SChristoph Hellwig ret = iomap_writepages(mapping, wbc, &wpc, &gfs2_writeback_ops); 217b066a4eeSAbhi Das if (ret == 0) 218b066a4eeSAbhi Das set_bit(SDF_FORCE_AIL_FLUSH, &sdp->sd_flags); 219b066a4eeSAbhi Das return ret; 220b1e71b06SSteven Whitehouse } 221b1e71b06SSteven Whitehouse 222b1e71b06SSteven Whitehouse /** 223b1e71b06SSteven Whitehouse * gfs2_write_jdata_pagevec - Write back a pagevec's worth of pages 224b1e71b06SSteven Whitehouse * @mapping: The mapping 225b1e71b06SSteven Whitehouse * @wbc: The writeback control 226b1e71b06SSteven Whitehouse * @pvec: The vector of pages 227b1e71b06SSteven Whitehouse * @nr_pages: The number of pages to write 2281272574bSFabian Frederick * @done_index: Page index 229b1e71b06SSteven Whitehouse * 230b1e71b06SSteven Whitehouse * Returns: non-zero if loop should terminate, zero otherwise 231b1e71b06SSteven Whitehouse */ 232b1e71b06SSteven Whitehouse 233b1e71b06SSteven Whitehouse static int gfs2_write_jdata_pagevec(struct address_space *mapping, 234b1e71b06SSteven Whitehouse struct writeback_control *wbc, 235b1e71b06SSteven Whitehouse struct pagevec *pvec, 2369aa01593SAndreas Gruenbacher int nr_pages, 237774016b2SSteven Whitehouse pgoff_t *done_index) 238b1e71b06SSteven Whitehouse { 239b1e71b06SSteven Whitehouse struct inode *inode = mapping->host; 240b1e71b06SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 24145eb0504SAndreas Gruenbacher unsigned nrblocks = nr_pages * (PAGE_SIZE >> inode->i_blkbits); 242b1e71b06SSteven Whitehouse int i; 243b1e71b06SSteven Whitehouse int ret; 244b1e71b06SSteven Whitehouse 245b1e71b06SSteven Whitehouse ret = gfs2_trans_begin(sdp, nrblocks, nrblocks); 246b1e71b06SSteven Whitehouse if (ret < 0) 247b1e71b06SSteven Whitehouse return ret; 248b1e71b06SSteven Whitehouse 249b1e71b06SSteven Whitehouse for(i = 0; i < nr_pages; i++) { 250b1e71b06SSteven Whitehouse struct page *page = pvec->pages[i]; 251b1e71b06SSteven Whitehouse 252774016b2SSteven Whitehouse *done_index = page->index; 253774016b2SSteven Whitehouse 254b1e71b06SSteven Whitehouse lock_page(page); 255b1e71b06SSteven Whitehouse 256b1e71b06SSteven Whitehouse if (unlikely(page->mapping != mapping)) { 257774016b2SSteven Whitehouse continue_unlock: 258b1e71b06SSteven Whitehouse unlock_page(page); 259b1e71b06SSteven Whitehouse continue; 260b1e71b06SSteven Whitehouse } 261b1e71b06SSteven Whitehouse 262774016b2SSteven Whitehouse if (!PageDirty(page)) { 263774016b2SSteven Whitehouse /* someone wrote it for us */ 264774016b2SSteven Whitehouse goto continue_unlock; 265b1e71b06SSteven Whitehouse } 266b1e71b06SSteven Whitehouse 267774016b2SSteven Whitehouse if (PageWriteback(page)) { 268b1e71b06SSteven Whitehouse if (wbc->sync_mode != WB_SYNC_NONE) 269b1e71b06SSteven Whitehouse wait_on_page_writeback(page); 270774016b2SSteven Whitehouse else 271774016b2SSteven Whitehouse goto continue_unlock; 272b1e71b06SSteven Whitehouse } 273b1e71b06SSteven Whitehouse 274774016b2SSteven Whitehouse BUG_ON(PageWriteback(page)); 275774016b2SSteven Whitehouse if (!clear_page_dirty_for_io(page)) 276774016b2SSteven Whitehouse goto continue_unlock; 277774016b2SSteven Whitehouse 278de1414a6SChristoph Hellwig trace_wbc_writepage(wbc, inode_to_bdi(inode)); 279b1e71b06SSteven Whitehouse 280b1e71b06SSteven Whitehouse ret = __gfs2_jdata_writepage(page, wbc); 281774016b2SSteven Whitehouse if (unlikely(ret)) { 282774016b2SSteven Whitehouse if (ret == AOP_WRITEPAGE_ACTIVATE) { 283774016b2SSteven Whitehouse unlock_page(page); 284774016b2SSteven Whitehouse ret = 0; 285774016b2SSteven Whitehouse } else { 286b1e71b06SSteven Whitehouse 287774016b2SSteven Whitehouse /* 288774016b2SSteven Whitehouse * done_index is set past this page, 289774016b2SSteven Whitehouse * so media errors will not choke 290774016b2SSteven Whitehouse * background writeout for the entire 291774016b2SSteven Whitehouse * file. This has consequences for 292774016b2SSteven Whitehouse * range_cyclic semantics (ie. it may 293774016b2SSteven Whitehouse * not be suitable for data integrity 294774016b2SSteven Whitehouse * writeout). 295774016b2SSteven Whitehouse */ 296774016b2SSteven Whitehouse *done_index = page->index + 1; 297b1e71b06SSteven Whitehouse ret = 1; 298774016b2SSteven Whitehouse break; 299774016b2SSteven Whitehouse } 300774016b2SSteven Whitehouse } 301774016b2SSteven Whitehouse 302774016b2SSteven Whitehouse /* 303774016b2SSteven Whitehouse * We stop writing back only if we are not doing 304774016b2SSteven Whitehouse * integrity sync. In case of integrity sync we have to 305774016b2SSteven Whitehouse * keep going until we have written all the pages 306774016b2SSteven Whitehouse * we tagged for writeback prior to entering this loop. 307774016b2SSteven Whitehouse */ 308774016b2SSteven Whitehouse if (--wbc->nr_to_write <= 0 && wbc->sync_mode == WB_SYNC_NONE) { 309774016b2SSteven Whitehouse ret = 1; 310774016b2SSteven Whitehouse break; 311774016b2SSteven Whitehouse } 312774016b2SSteven Whitehouse 313b1e71b06SSteven Whitehouse } 314b1e71b06SSteven Whitehouse gfs2_trans_end(sdp); 315b1e71b06SSteven Whitehouse return ret; 316b1e71b06SSteven Whitehouse } 317b1e71b06SSteven Whitehouse 318b1e71b06SSteven Whitehouse /** 319b1e71b06SSteven Whitehouse * gfs2_write_cache_jdata - Like write_cache_pages but different 320b1e71b06SSteven Whitehouse * @mapping: The mapping to write 321b1e71b06SSteven Whitehouse * @wbc: The writeback control 322b1e71b06SSteven Whitehouse * 323b1e71b06SSteven Whitehouse * The reason that we use our own function here is that we need to 324b1e71b06SSteven Whitehouse * start transactions before we grab page locks. This allows us 325b1e71b06SSteven Whitehouse * to get the ordering right. 326b1e71b06SSteven Whitehouse */ 327b1e71b06SSteven Whitehouse 328b1e71b06SSteven Whitehouse static int gfs2_write_cache_jdata(struct address_space *mapping, 329b1e71b06SSteven Whitehouse struct writeback_control *wbc) 330b1e71b06SSteven Whitehouse { 331b1e71b06SSteven Whitehouse int ret = 0; 332b1e71b06SSteven Whitehouse int done = 0; 333b1e71b06SSteven Whitehouse struct pagevec pvec; 334b1e71b06SSteven Whitehouse int nr_pages; 3353f649ab7SKees Cook pgoff_t writeback_index; 336b1e71b06SSteven Whitehouse pgoff_t index; 337b1e71b06SSteven Whitehouse pgoff_t end; 338774016b2SSteven Whitehouse pgoff_t done_index; 339774016b2SSteven Whitehouse int cycled; 340b1e71b06SSteven Whitehouse int range_whole = 0; 34110bbd235SMatthew Wilcox xa_mark_t tag; 342b1e71b06SSteven Whitehouse 34386679820SMel Gorman pagevec_init(&pvec); 344b1e71b06SSteven Whitehouse if (wbc->range_cyclic) { 345774016b2SSteven Whitehouse writeback_index = mapping->writeback_index; /* prev offset */ 346774016b2SSteven Whitehouse index = writeback_index; 347774016b2SSteven Whitehouse if (index == 0) 348774016b2SSteven Whitehouse cycled = 1; 349774016b2SSteven Whitehouse else 350774016b2SSteven Whitehouse cycled = 0; 351b1e71b06SSteven Whitehouse end = -1; 352b1e71b06SSteven Whitehouse } else { 35309cbfeafSKirill A. Shutemov index = wbc->range_start >> PAGE_SHIFT; 35409cbfeafSKirill A. Shutemov end = wbc->range_end >> PAGE_SHIFT; 355b1e71b06SSteven Whitehouse if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) 356b1e71b06SSteven Whitehouse range_whole = 1; 357774016b2SSteven Whitehouse cycled = 1; /* ignore range_cyclic tests */ 358b1e71b06SSteven Whitehouse } 359774016b2SSteven Whitehouse if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) 360774016b2SSteven Whitehouse tag = PAGECACHE_TAG_TOWRITE; 361774016b2SSteven Whitehouse else 362774016b2SSteven Whitehouse tag = PAGECACHE_TAG_DIRTY; 363b1e71b06SSteven Whitehouse 364b1e71b06SSteven Whitehouse retry: 365774016b2SSteven Whitehouse if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) 366774016b2SSteven Whitehouse tag_pages_for_writeback(mapping, index, end); 367774016b2SSteven Whitehouse done_index = index; 368774016b2SSteven Whitehouse while (!done && (index <= end)) { 369d2bc5b3cSJan Kara nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end, 37067fd707fSJan Kara tag); 371774016b2SSteven Whitehouse if (nr_pages == 0) 372774016b2SSteven Whitehouse break; 373774016b2SSteven Whitehouse 3749aa01593SAndreas Gruenbacher ret = gfs2_write_jdata_pagevec(mapping, wbc, &pvec, nr_pages, &done_index); 375b1e71b06SSteven Whitehouse if (ret) 376b1e71b06SSteven Whitehouse done = 1; 377b1e71b06SSteven Whitehouse if (ret > 0) 378b1e71b06SSteven Whitehouse ret = 0; 379b1e71b06SSteven Whitehouse pagevec_release(&pvec); 380b1e71b06SSteven Whitehouse cond_resched(); 381b1e71b06SSteven Whitehouse } 382b1e71b06SSteven Whitehouse 383774016b2SSteven Whitehouse if (!cycled && !done) { 384b1e71b06SSteven Whitehouse /* 385774016b2SSteven Whitehouse * range_cyclic: 386b1e71b06SSteven Whitehouse * We hit the last page and there is more work to be done: wrap 387b1e71b06SSteven Whitehouse * back to the start of the file 388b1e71b06SSteven Whitehouse */ 389774016b2SSteven Whitehouse cycled = 1; 390b1e71b06SSteven Whitehouse index = 0; 391774016b2SSteven Whitehouse end = writeback_index - 1; 392b1e71b06SSteven Whitehouse goto retry; 393b1e71b06SSteven Whitehouse } 394b1e71b06SSteven Whitehouse 395b1e71b06SSteven Whitehouse if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) 396774016b2SSteven Whitehouse mapping->writeback_index = done_index; 397774016b2SSteven Whitehouse 398b1e71b06SSteven Whitehouse return ret; 399b1e71b06SSteven Whitehouse } 400b1e71b06SSteven Whitehouse 401b1e71b06SSteven Whitehouse 402b1e71b06SSteven Whitehouse /** 403b1e71b06SSteven Whitehouse * gfs2_jdata_writepages - Write a bunch of dirty pages back to disk 404b1e71b06SSteven Whitehouse * @mapping: The mapping to write 405b1e71b06SSteven Whitehouse * @wbc: The writeback control 406b1e71b06SSteven Whitehouse * 407b1e71b06SSteven Whitehouse */ 408b1e71b06SSteven Whitehouse 409b1e71b06SSteven Whitehouse static int gfs2_jdata_writepages(struct address_space *mapping, 410b1e71b06SSteven Whitehouse struct writeback_control *wbc) 411b1e71b06SSteven Whitehouse { 412b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(mapping->host); 413b1e71b06SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(mapping->host); 414b1e71b06SSteven Whitehouse int ret; 415b1e71b06SSteven Whitehouse 416b1e71b06SSteven Whitehouse ret = gfs2_write_cache_jdata(mapping, wbc); 417b1e71b06SSteven Whitehouse if (ret == 0 && wbc->sync_mode == WB_SYNC_ALL) { 418805c0907SBob Peterson gfs2_log_flush(sdp, ip->i_gl, GFS2_LOG_HEAD_FLUSH_NORMAL | 419805c0907SBob Peterson GFS2_LFC_JDATA_WPAGES); 420b1e71b06SSteven Whitehouse ret = gfs2_write_cache_jdata(mapping, wbc); 421b1e71b06SSteven Whitehouse } 422b1e71b06SSteven Whitehouse return ret; 423b1e71b06SSteven Whitehouse } 424b1e71b06SSteven Whitehouse 425b1e71b06SSteven Whitehouse /** 426b1e71b06SSteven Whitehouse * stuffed_readpage - Fill in a Linux page with stuffed file data 427b1e71b06SSteven Whitehouse * @ip: the inode 428b1e71b06SSteven Whitehouse * @page: the page 429b1e71b06SSteven Whitehouse * 430b1e71b06SSteven Whitehouse * Returns: errno 431b1e71b06SSteven Whitehouse */ 432378b6cbfSChristoph Hellwig static int stuffed_readpage(struct gfs2_inode *ip, struct page *page) 433b1e71b06SSteven Whitehouse { 434b1e71b06SSteven Whitehouse struct buffer_head *dibh; 435602c89d2SSteven Whitehouse u64 dsize = i_size_read(&ip->i_inode); 436b1e71b06SSteven Whitehouse void *kaddr; 437b1e71b06SSteven Whitehouse int error; 438b1e71b06SSteven Whitehouse 439b1e71b06SSteven Whitehouse /* 440b1e71b06SSteven Whitehouse * Due to the order of unstuffing files and ->fault(), we can be 441b1e71b06SSteven Whitehouse * asked for a zero page in the case of a stuffed file being extended, 442b1e71b06SSteven Whitehouse * so we need to supply one here. It doesn't happen often. 443b1e71b06SSteven Whitehouse */ 444b1e71b06SSteven Whitehouse if (unlikely(page->index)) { 44509cbfeafSKirill A. Shutemov zero_user(page, 0, PAGE_SIZE); 446b1e71b06SSteven Whitehouse SetPageUptodate(page); 447b1e71b06SSteven Whitehouse return 0; 448b1e71b06SSteven Whitehouse } 449b1e71b06SSteven Whitehouse 450b1e71b06SSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 451b1e71b06SSteven Whitehouse if (error) 452b1e71b06SSteven Whitehouse return error; 453b1e71b06SSteven Whitehouse 454d9349285SCong Wang kaddr = kmap_atomic(page); 455235628c5SAndreas Gruenbacher if (dsize > gfs2_max_stuffed_size(ip)) 456235628c5SAndreas Gruenbacher dsize = gfs2_max_stuffed_size(ip); 457602c89d2SSteven Whitehouse memcpy(kaddr, dibh->b_data + sizeof(struct gfs2_dinode), dsize); 45809cbfeafSKirill A. Shutemov memset(kaddr + dsize, 0, PAGE_SIZE - dsize); 459d9349285SCong Wang kunmap_atomic(kaddr); 460b1e71b06SSteven Whitehouse flush_dcache_page(page); 461b1e71b06SSteven Whitehouse brelse(dibh); 462b1e71b06SSteven Whitehouse SetPageUptodate(page); 463b1e71b06SSteven Whitehouse 464b1e71b06SSteven Whitehouse return 0; 465b1e71b06SSteven Whitehouse } 466b1e71b06SSteven Whitehouse 467b1e71b06SSteven Whitehouse 468b1e71b06SSteven Whitehouse static int __gfs2_readpage(void *file, struct page *page) 469b1e71b06SSteven Whitehouse { 4702164f9b9SChristoph Hellwig struct inode *inode = page->mapping->host; 4712164f9b9SChristoph Hellwig struct gfs2_inode *ip = GFS2_I(inode); 4722164f9b9SChristoph Hellwig struct gfs2_sbd *sdp = GFS2_SB(inode); 473b1e71b06SSteven Whitehouse int error; 474b1e71b06SSteven Whitehouse 4752164f9b9SChristoph Hellwig if (!gfs2_is_jdata(ip) || 4762164f9b9SChristoph Hellwig (i_blocksize(inode) == PAGE_SIZE && !page_has_buffers(page))) { 477f95cbb44SAndreas Gruenbacher error = iomap_readpage(page, &gfs2_iomap_ops); 478f95cbb44SAndreas Gruenbacher } else if (gfs2_is_stuffed(ip)) { 479b1e71b06SSteven Whitehouse error = stuffed_readpage(ip, page); 480b1e71b06SSteven Whitehouse unlock_page(page); 481b1e71b06SSteven Whitehouse } else { 482b1e71b06SSteven Whitehouse error = mpage_readpage(page, gfs2_block_map); 483b1e71b06SSteven Whitehouse } 484b1e71b06SSteven Whitehouse 485eb43e660SBob Peterson if (unlikely(gfs2_withdrawn(sdp))) 486b1e71b06SSteven Whitehouse return -EIO; 487b1e71b06SSteven Whitehouse 488b1e71b06SSteven Whitehouse return error; 489b1e71b06SSteven Whitehouse } 490b1e71b06SSteven Whitehouse 491b1e71b06SSteven Whitehouse /** 492b1e71b06SSteven Whitehouse * gfs2_readpage - read a page of a file 493b1e71b06SSteven Whitehouse * @file: The file to read 494b1e71b06SSteven Whitehouse * @page: The page of the file 495b1e71b06SSteven Whitehouse */ 496b1e71b06SSteven Whitehouse 497b1e71b06SSteven Whitehouse static int gfs2_readpage(struct file *file, struct page *page) 498b1e71b06SSteven Whitehouse { 49920f82999SAndreas Gruenbacher return __gfs2_readpage(file, page); 500b1e71b06SSteven Whitehouse } 501b1e71b06SSteven Whitehouse 502b1e71b06SSteven Whitehouse /** 503b1e71b06SSteven Whitehouse * gfs2_internal_read - read an internal file 504b1e71b06SSteven Whitehouse * @ip: The gfs2 inode 505b1e71b06SSteven Whitehouse * @buf: The buffer to fill 506b1e71b06SSteven Whitehouse * @pos: The file position 507b1e71b06SSteven Whitehouse * @size: The amount to read 508b1e71b06SSteven Whitehouse * 509b1e71b06SSteven Whitehouse */ 510b1e71b06SSteven Whitehouse 5114306629eSAndrew Price int gfs2_internal_read(struct gfs2_inode *ip, char *buf, loff_t *pos, 5124306629eSAndrew Price unsigned size) 513b1e71b06SSteven Whitehouse { 514b1e71b06SSteven Whitehouse struct address_space *mapping = ip->i_inode.i_mapping; 51545eb0504SAndreas Gruenbacher unsigned long index = *pos >> PAGE_SHIFT; 51609cbfeafSKirill A. Shutemov unsigned offset = *pos & (PAGE_SIZE - 1); 517b1e71b06SSteven Whitehouse unsigned copied = 0; 518b1e71b06SSteven Whitehouse unsigned amt; 519b1e71b06SSteven Whitehouse struct page *page; 520b1e71b06SSteven Whitehouse void *p; 521b1e71b06SSteven Whitehouse 522b1e71b06SSteven Whitehouse do { 523b1e71b06SSteven Whitehouse amt = size - copied; 52409cbfeafSKirill A. Shutemov if (offset + size > PAGE_SIZE) 52509cbfeafSKirill A. Shutemov amt = PAGE_SIZE - offset; 526b1e71b06SSteven Whitehouse page = read_cache_page(mapping, index, __gfs2_readpage, NULL); 527b1e71b06SSteven Whitehouse if (IS_ERR(page)) 528b1e71b06SSteven Whitehouse return PTR_ERR(page); 529d9349285SCong Wang p = kmap_atomic(page); 530b1e71b06SSteven Whitehouse memcpy(buf + copied, p + offset, amt); 531d9349285SCong Wang kunmap_atomic(p); 53209cbfeafSKirill A. Shutemov put_page(page); 533b1e71b06SSteven Whitehouse copied += amt; 534b1e71b06SSteven Whitehouse index++; 535b1e71b06SSteven Whitehouse offset = 0; 536b1e71b06SSteven Whitehouse } while(copied < size); 537b1e71b06SSteven Whitehouse (*pos) += size; 538b1e71b06SSteven Whitehouse return size; 539b1e71b06SSteven Whitehouse } 540b1e71b06SSteven Whitehouse 541b1e71b06SSteven Whitehouse /** 542d4388340SMatthew Wilcox (Oracle) * gfs2_readahead - Read a bunch of pages at once 543c551f66cSLee Jones * @rac: Read-ahead control structure 544b1e71b06SSteven Whitehouse * 545b1e71b06SSteven Whitehouse * Some notes: 546b1e71b06SSteven Whitehouse * 1. This is only for readahead, so we can simply ignore any things 547b1e71b06SSteven Whitehouse * which are slightly inconvenient (such as locking conflicts between 548b1e71b06SSteven Whitehouse * the page lock and the glock) and return having done no I/O. Its 549b1e71b06SSteven Whitehouse * obviously not something we'd want to do on too regular a basis. 550b1e71b06SSteven Whitehouse * Any I/O we ignore at this time will be done via readpage later. 551b1e71b06SSteven Whitehouse * 2. We don't handle stuffed files here we let readpage do the honours. 552d4388340SMatthew Wilcox (Oracle) * 3. mpage_readahead() does most of the heavy lifting in the common case. 553b1e71b06SSteven Whitehouse * 4. gfs2_block_map() is relied upon to set BH_Boundary in the right places. 554b1e71b06SSteven Whitehouse */ 555b1e71b06SSteven Whitehouse 556d4388340SMatthew Wilcox (Oracle) static void gfs2_readahead(struct readahead_control *rac) 557b1e71b06SSteven Whitehouse { 558d4388340SMatthew Wilcox (Oracle) struct inode *inode = rac->mapping->host; 559b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 560b1e71b06SSteven Whitehouse 5612164f9b9SChristoph Hellwig if (gfs2_is_stuffed(ip)) 5622164f9b9SChristoph Hellwig ; 5632164f9b9SChristoph Hellwig else if (gfs2_is_jdata(ip)) 564d4388340SMatthew Wilcox (Oracle) mpage_readahead(rac, gfs2_block_map); 5652164f9b9SChristoph Hellwig else 5662164f9b9SChristoph Hellwig iomap_readahead(rac, &gfs2_iomap_ops); 567b1e71b06SSteven Whitehouse } 568b1e71b06SSteven Whitehouse 569b1e71b06SSteven Whitehouse /** 570b1e71b06SSteven Whitehouse * adjust_fs_space - Adjusts the free space available due to gfs2_grow 571b1e71b06SSteven Whitehouse * @inode: the rindex inode 572b1e71b06SSteven Whitehouse */ 57364bc06bbSAndreas Gruenbacher void adjust_fs_space(struct inode *inode) 574b1e71b06SSteven Whitehouse { 575d0a22a4bSAndreas Gruenbacher struct gfs2_sbd *sdp = GFS2_SB(inode); 5761946f70aSBenjamin Marzinski struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 577b1e71b06SSteven Whitehouse struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 578b1e71b06SSteven Whitehouse struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 57970c11ba8SBob Peterson struct buffer_head *m_bh; 580b1e71b06SSteven Whitehouse u64 fs_total, new_free; 581b1e71b06SSteven Whitehouse 582d0a22a4bSAndreas Gruenbacher if (gfs2_trans_begin(sdp, 2 * RES_STATFS, 0) != 0) 583d0a22a4bSAndreas Gruenbacher return; 584d0a22a4bSAndreas Gruenbacher 585b1e71b06SSteven Whitehouse /* Total up the file system space, according to the latest rindex. */ 586b1e71b06SSteven Whitehouse fs_total = gfs2_ri_total(sdp); 5871946f70aSBenjamin Marzinski if (gfs2_meta_inode_buffer(m_ip, &m_bh) != 0) 588d0a22a4bSAndreas Gruenbacher goto out; 589b1e71b06SSteven Whitehouse 590b1e71b06SSteven Whitehouse spin_lock(&sdp->sd_statfs_spin); 5911946f70aSBenjamin Marzinski gfs2_statfs_change_in(m_sc, m_bh->b_data + 5921946f70aSBenjamin Marzinski sizeof(struct gfs2_dinode)); 593b1e71b06SSteven Whitehouse if (fs_total > (m_sc->sc_total + l_sc->sc_total)) 594b1e71b06SSteven Whitehouse new_free = fs_total - (m_sc->sc_total + l_sc->sc_total); 595b1e71b06SSteven Whitehouse else 596b1e71b06SSteven Whitehouse new_free = 0; 597b1e71b06SSteven Whitehouse spin_unlock(&sdp->sd_statfs_spin); 598b1e71b06SSteven Whitehouse fs_warn(sdp, "File system extended by %llu blocks.\n", 599b1e71b06SSteven Whitehouse (unsigned long long)new_free); 600b1e71b06SSteven Whitehouse gfs2_statfs_change(sdp, new_free, new_free, 0); 6011946f70aSBenjamin Marzinski 60270c11ba8SBob Peterson update_statfs(sdp, m_bh); 6031946f70aSBenjamin Marzinski brelse(m_bh); 604d0a22a4bSAndreas Gruenbacher out: 605d0a22a4bSAndreas Gruenbacher sdp->sd_rindex_uptodate = 0; 606d0a22a4bSAndreas Gruenbacher gfs2_trans_end(sdp); 607b1e71b06SSteven Whitehouse } 608b1e71b06SSteven Whitehouse 609b1e71b06SSteven Whitehouse /** 610b9e03f18SBob Peterson * jdata_set_page_dirty - Page dirtying function 611b1e71b06SSteven Whitehouse * @page: The page to dirty 612b1e71b06SSteven Whitehouse * 613b1e71b06SSteven Whitehouse * Returns: 1 if it dirtyed the page, or 0 otherwise 614b1e71b06SSteven Whitehouse */ 615b1e71b06SSteven Whitehouse 616b9e03f18SBob Peterson static int jdata_set_page_dirty(struct page *page) 617b1e71b06SSteven Whitehouse { 6186302d6f4SBob Peterson if (current->journal_info) 619b1e71b06SSteven Whitehouse SetPageChecked(page); 620b1e71b06SSteven Whitehouse return __set_page_dirty_buffers(page); 621b1e71b06SSteven Whitehouse } 622b1e71b06SSteven Whitehouse 623b1e71b06SSteven Whitehouse /** 624b1e71b06SSteven Whitehouse * gfs2_bmap - Block map function 625b1e71b06SSteven Whitehouse * @mapping: Address space info 626b1e71b06SSteven Whitehouse * @lblock: The block to map 627b1e71b06SSteven Whitehouse * 628b1e71b06SSteven Whitehouse * Returns: The disk address for the block or 0 on hole or error 629b1e71b06SSteven Whitehouse */ 630b1e71b06SSteven Whitehouse 631b1e71b06SSteven Whitehouse static sector_t gfs2_bmap(struct address_space *mapping, sector_t lblock) 632b1e71b06SSteven Whitehouse { 633b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(mapping->host); 634b1e71b06SSteven Whitehouse struct gfs2_holder i_gh; 635b1e71b06SSteven Whitehouse sector_t dblock = 0; 636b1e71b06SSteven Whitehouse int error; 637b1e71b06SSteven Whitehouse 638b1e71b06SSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 639b1e71b06SSteven Whitehouse if (error) 640b1e71b06SSteven Whitehouse return 0; 641b1e71b06SSteven Whitehouse 642b1e71b06SSteven Whitehouse if (!gfs2_is_stuffed(ip)) 6437770c93aSChristoph Hellwig dblock = iomap_bmap(mapping, lblock, &gfs2_iomap_ops); 644b1e71b06SSteven Whitehouse 645b1e71b06SSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 646b1e71b06SSteven Whitehouse 647b1e71b06SSteven Whitehouse return dblock; 648b1e71b06SSteven Whitehouse } 649b1e71b06SSteven Whitehouse 650b1e71b06SSteven Whitehouse static void gfs2_discard(struct gfs2_sbd *sdp, struct buffer_head *bh) 651b1e71b06SSteven Whitehouse { 652b1e71b06SSteven Whitehouse struct gfs2_bufdata *bd; 653b1e71b06SSteven Whitehouse 654b1e71b06SSteven Whitehouse lock_buffer(bh); 655b1e71b06SSteven Whitehouse gfs2_log_lock(sdp); 656b1e71b06SSteven Whitehouse clear_buffer_dirty(bh); 657b1e71b06SSteven Whitehouse bd = bh->b_private; 658b1e71b06SSteven Whitehouse if (bd) { 659c0752aa7SBob Peterson if (!list_empty(&bd->bd_list) && !buffer_pinned(bh)) 660c0752aa7SBob Peterson list_del_init(&bd->bd_list); 66168942870SBob Peterson else { 66268942870SBob Peterson spin_lock(&sdp->sd_ail_lock); 66368cd4ce2SBob Peterson gfs2_remove_from_journal(bh, REMOVE_JDATA); 66468942870SBob Peterson spin_unlock(&sdp->sd_ail_lock); 66568942870SBob Peterson } 666b1e71b06SSteven Whitehouse } 667b1e71b06SSteven Whitehouse bh->b_bdev = NULL; 668b1e71b06SSteven Whitehouse clear_buffer_mapped(bh); 669b1e71b06SSteven Whitehouse clear_buffer_req(bh); 670b1e71b06SSteven Whitehouse clear_buffer_new(bh); 671b1e71b06SSteven Whitehouse gfs2_log_unlock(sdp); 672b1e71b06SSteven Whitehouse unlock_buffer(bh); 673b1e71b06SSteven Whitehouse } 674b1e71b06SSteven Whitehouse 6755f4b2976SMatthew Wilcox (Oracle) static void gfs2_invalidate_folio(struct folio *folio, size_t offset, 6765f4b2976SMatthew Wilcox (Oracle) size_t length) 677b1e71b06SSteven Whitehouse { 6785f4b2976SMatthew Wilcox (Oracle) struct gfs2_sbd *sdp = GFS2_SB(folio->mapping->host); 6795f4b2976SMatthew Wilcox (Oracle) size_t stop = offset + length; 6805f4b2976SMatthew Wilcox (Oracle) int partial_page = (offset || length < folio_size(folio)); 681b1e71b06SSteven Whitehouse struct buffer_head *bh, *head; 682b1e71b06SSteven Whitehouse unsigned long pos = 0; 683b1e71b06SSteven Whitehouse 6845f4b2976SMatthew Wilcox (Oracle) BUG_ON(!folio_test_locked(folio)); 6855c0bb97cSLukas Czerner if (!partial_page) 6865f4b2976SMatthew Wilcox (Oracle) folio_clear_checked(folio); 6875f4b2976SMatthew Wilcox (Oracle) head = folio_buffers(folio); 6885f4b2976SMatthew Wilcox (Oracle) if (!head) 689b1e71b06SSteven Whitehouse goto out; 690b1e71b06SSteven Whitehouse 6915f4b2976SMatthew Wilcox (Oracle) bh = head; 692b1e71b06SSteven Whitehouse do { 6935c0bb97cSLukas Czerner if (pos + bh->b_size > stop) 6945c0bb97cSLukas Czerner return; 6955c0bb97cSLukas Czerner 696b1e71b06SSteven Whitehouse if (offset <= pos) 697b1e71b06SSteven Whitehouse gfs2_discard(sdp, bh); 698b1e71b06SSteven Whitehouse pos += bh->b_size; 699b1e71b06SSteven Whitehouse bh = bh->b_this_page; 700b1e71b06SSteven Whitehouse } while (bh != head); 701b1e71b06SSteven Whitehouse out: 7025c0bb97cSLukas Czerner if (!partial_page) 7035f4b2976SMatthew Wilcox (Oracle) filemap_release_folio(folio, 0); 704b1e71b06SSteven Whitehouse } 705b1e71b06SSteven Whitehouse 706b1e71b06SSteven Whitehouse /** 707b1e71b06SSteven Whitehouse * gfs2_releasepage - free the metadata associated with a page 708b1e71b06SSteven Whitehouse * @page: the page that's being released 709b1e71b06SSteven Whitehouse * @gfp_mask: passed from Linux VFS, ignored by us 710b1e71b06SSteven Whitehouse * 7110ebbe4f9SAndreas Gruenbacher * Calls try_to_free_buffers() to free the buffers and put the page if the 7120ebbe4f9SAndreas Gruenbacher * buffers can be released. 713b1e71b06SSteven Whitehouse * 7140ebbe4f9SAndreas Gruenbacher * Returns: 1 if the page was put or else 0 715b1e71b06SSteven Whitehouse */ 716b1e71b06SSteven Whitehouse 717b1e71b06SSteven Whitehouse int gfs2_releasepage(struct page *page, gfp_t gfp_mask) 718b1e71b06SSteven Whitehouse { 719009d8518SSteven Whitehouse struct address_space *mapping = page->mapping; 720009d8518SSteven Whitehouse struct gfs2_sbd *sdp = gfs2_mapping2sbd(mapping); 721b1e71b06SSteven Whitehouse struct buffer_head *bh, *head; 722b1e71b06SSteven Whitehouse struct gfs2_bufdata *bd; 723b1e71b06SSteven Whitehouse 724b1e71b06SSteven Whitehouse if (!page_has_buffers(page)) 725b1e71b06SSteven Whitehouse return 0; 726b1e71b06SSteven Whitehouse 7271c185c02SAndreas Gruenbacher /* 7281c185c02SAndreas Gruenbacher * From xfs_vm_releasepage: mm accommodates an old ext3 case where 7291c185c02SAndreas Gruenbacher * clean pages might not have had the dirty bit cleared. Thus, it can 7301c185c02SAndreas Gruenbacher * send actual dirty pages to ->releasepage() via shrink_active_list(). 7311c185c02SAndreas Gruenbacher * 7321c185c02SAndreas Gruenbacher * As a workaround, we skip pages that contain dirty buffers below. 7331c185c02SAndreas Gruenbacher * Once ->releasepage isn't called on dirty pages anymore, we can warn 7341c185c02SAndreas Gruenbacher * on dirty buffers like we used to here again. 7351c185c02SAndreas Gruenbacher */ 7361c185c02SAndreas Gruenbacher 737b1e71b06SSteven Whitehouse gfs2_log_lock(sdp); 738b1e71b06SSteven Whitehouse head = bh = page_buffers(page); 739b1e71b06SSteven Whitehouse do { 740b1e71b06SSteven Whitehouse if (atomic_read(&bh->b_count)) 741b1e71b06SSteven Whitehouse goto cannot_release; 742b1e71b06SSteven Whitehouse bd = bh->b_private; 74316ca9412SBenjamin Marzinski if (bd && bd->bd_tr) 744b1e71b06SSteven Whitehouse goto cannot_release; 7451c185c02SAndreas Gruenbacher if (buffer_dirty(bh) || WARN_ON(buffer_pinned(bh))) 7461c185c02SAndreas Gruenbacher goto cannot_release; 747b1e71b06SSteven Whitehouse bh = bh->b_this_page; 748b1e71b06SSteven Whitehouse } while(bh != head); 749b1e71b06SSteven Whitehouse 750b1e71b06SSteven Whitehouse head = bh = page_buffers(page); 751b1e71b06SSteven Whitehouse do { 752b1e71b06SSteven Whitehouse bd = bh->b_private; 753b1e71b06SSteven Whitehouse if (bd) { 754b1e71b06SSteven Whitehouse gfs2_assert_warn(sdp, bd->bd_bh == bh); 755b1e71b06SSteven Whitehouse bd->bd_bh = NULL; 756b1e71b06SSteven Whitehouse bh->b_private = NULL; 757019dd669SBob Peterson /* 758019dd669SBob Peterson * The bd may still be queued as a revoke, in which 759019dd669SBob Peterson * case we must not dequeue nor free it. 760019dd669SBob Peterson */ 761019dd669SBob Peterson if (!bd->bd_blkno && !list_empty(&bd->bd_list)) 762019dd669SBob Peterson list_del_init(&bd->bd_list); 763019dd669SBob Peterson if (list_empty(&bd->bd_list)) 764b1e71b06SSteven Whitehouse kmem_cache_free(gfs2_bufdata_cachep, bd); 765e4f29206SSteven Whitehouse } 766b1e71b06SSteven Whitehouse 767b1e71b06SSteven Whitehouse bh = bh->b_this_page; 768b1e71b06SSteven Whitehouse } while (bh != head); 769e4f29206SSteven Whitehouse gfs2_log_unlock(sdp); 770b1e71b06SSteven Whitehouse 771b1e71b06SSteven Whitehouse return try_to_free_buffers(page); 7728f065d36SSteven Whitehouse 773b1e71b06SSteven Whitehouse cannot_release: 774b1e71b06SSteven Whitehouse gfs2_log_unlock(sdp); 775b1e71b06SSteven Whitehouse return 0; 776b1e71b06SSteven Whitehouse } 777b1e71b06SSteven Whitehouse 778eadd7535SChristoph Hellwig static const struct address_space_operations gfs2_aops = { 7799d358143SSteven Whitehouse .writepage = gfs2_writepage, 78045138990SSteven Whitehouse .writepages = gfs2_writepages, 781b1e71b06SSteven Whitehouse .readpage = gfs2_readpage, 782d4388340SMatthew Wilcox (Oracle) .readahead = gfs2_readahead, 783*187c82cbSMatthew Wilcox (Oracle) .dirty_folio = filemap_dirty_folio, 7842164f9b9SChristoph Hellwig .releasepage = iomap_releasepage, 785d82354f6SMatthew Wilcox (Oracle) .invalidate_folio = iomap_invalidate_folio, 786b1e71b06SSteven Whitehouse .bmap = gfs2_bmap, 787967bcc91SAndreas Gruenbacher .direct_IO = noop_direct_IO, 7882164f9b9SChristoph Hellwig .migratepage = iomap_migrate_page, 7892164f9b9SChristoph Hellwig .is_partially_uptodate = iomap_is_partially_uptodate, 790aa261f54SAndi Kleen .error_remove_page = generic_error_remove_page, 791b1e71b06SSteven Whitehouse }; 792b1e71b06SSteven Whitehouse 793b1e71b06SSteven Whitehouse static const struct address_space_operations gfs2_jdata_aops = { 794b1e71b06SSteven Whitehouse .writepage = gfs2_jdata_writepage, 795b1e71b06SSteven Whitehouse .writepages = gfs2_jdata_writepages, 796b1e71b06SSteven Whitehouse .readpage = gfs2_readpage, 797d4388340SMatthew Wilcox (Oracle) .readahead = gfs2_readahead, 798b9e03f18SBob Peterson .set_page_dirty = jdata_set_page_dirty, 799b1e71b06SSteven Whitehouse .bmap = gfs2_bmap, 8005f4b2976SMatthew Wilcox (Oracle) .invalidate_folio = gfs2_invalidate_folio, 801b1e71b06SSteven Whitehouse .releasepage = gfs2_releasepage, 802b1e71b06SSteven Whitehouse .is_partially_uptodate = block_is_partially_uptodate, 803aa261f54SAndi Kleen .error_remove_page = generic_error_remove_page, 804b1e71b06SSteven Whitehouse }; 805b1e71b06SSteven Whitehouse 806b1e71b06SSteven Whitehouse void gfs2_set_aops(struct inode *inode) 807b1e71b06SSteven Whitehouse { 808eadd7535SChristoph Hellwig if (gfs2_is_jdata(GFS2_I(inode))) 809b1e71b06SSteven Whitehouse inode->i_mapping->a_ops = &gfs2_jdata_aops; 810b1e71b06SSteven Whitehouse else 811eadd7535SChristoph Hellwig inode->i_mapping->a_ops = &gfs2_aops; 812b1e71b06SSteven Whitehouse } 813