David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
Bob Peterson | 091806ed | 2008-04-29 12:35:48 -0500 | [diff] [blame] | 3 | * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 4 | * |
| 5 | * This copyrighted material is made available to anyone wishing to use, |
| 6 | * modify, copy, or redistribute it subject to the terms and conditions |
Steven Whitehouse | e9fc2aa | 2006-09-01 11:05:15 -0400 | [diff] [blame] | 7 | * of the GNU General Public License version 2. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 8 | */ |
| 9 | |
| 10 | #include <linux/sched.h> |
| 11 | #include <linux/slab.h> |
| 12 | #include <linux/spinlock.h> |
| 13 | #include <linux/completion.h> |
| 14 | #include <linux/buffer_head.h> |
| 15 | #include <linux/mm.h> |
| 16 | #include <linux/pagemap.h> |
| 17 | #include <linux/writeback.h> |
| 18 | #include <linux/swap.h> |
| 19 | #include <linux/delay.h> |
Steven Whitehouse | 2e565bb | 2006-10-02 11:38:25 -0400 | [diff] [blame] | 20 | #include <linux/bio.h> |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 21 | #include <linux/gfs2_ondisk.h> |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 22 | |
| 23 | #include "gfs2.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 24 | #include "incore.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 25 | #include "glock.h" |
| 26 | #include "glops.h" |
| 27 | #include "inode.h" |
| 28 | #include "log.h" |
| 29 | #include "lops.h" |
| 30 | #include "meta_io.h" |
| 31 | #include "rgrp.h" |
| 32 | #include "trans.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 33 | #include "util.h" |
Steven Whitehouse | 627c10b | 2011-04-14 14:09:52 +0100 | [diff] [blame] | 34 | #include "trace_gfs2.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 35 | |
Steven Whitehouse | 4a0f9a3 | 2009-04-20 08:16:26 +0100 | [diff] [blame] | 36 | static int gfs2_aspace_writepage(struct page *page, struct writeback_control *wbc) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 37 | { |
Steven Whitehouse | 4a0f9a3 | 2009-04-20 08:16:26 +0100 | [diff] [blame] | 38 | struct buffer_head *bh, *head; |
| 39 | int nr_underway = 0; |
Christoph Hellwig | 65299a3 | 2011-08-23 14:50:29 +0200 | [diff] [blame] | 40 | int write_op = REQ_META | REQ_PRIO | |
Jens Axboe | 721a960 | 2011-03-09 11:56:30 +0100 | [diff] [blame] | 41 | (wbc->sync_mode == WB_SYNC_ALL ? WRITE_SYNC : WRITE); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 42 | |
Steven Whitehouse | 4a0f9a3 | 2009-04-20 08:16:26 +0100 | [diff] [blame] | 43 | BUG_ON(!PageLocked(page)); |
| 44 | BUG_ON(!page_has_buffers(page)); |
| 45 | |
| 46 | head = page_buffers(page); |
| 47 | bh = head; |
| 48 | |
| 49 | do { |
| 50 | if (!buffer_mapped(bh)) |
| 51 | continue; |
| 52 | /* |
| 53 | * If it's a fully non-blocking write attempt and we cannot |
| 54 | * lock the buffer then redirty the page. Note that this can |
Artem Bityutskiy | e76e0ec | 2012-07-25 18:12:13 +0300 | [diff] [blame] | 55 | * potentially cause a busy-wait loop from flusher thread and kswapd |
Steven Whitehouse | 4a0f9a3 | 2009-04-20 08:16:26 +0100 | [diff] [blame] | 56 | * activity, but those code paths have their own higher-level |
| 57 | * throttling. |
| 58 | */ |
Wu Fengguang | 1b430be | 2010-10-26 14:21:26 -0700 | [diff] [blame] | 59 | if (wbc->sync_mode != WB_SYNC_NONE) { |
Steven Whitehouse | 4a0f9a3 | 2009-04-20 08:16:26 +0100 | [diff] [blame] | 60 | lock_buffer(bh); |
| 61 | } else if (!trylock_buffer(bh)) { |
| 62 | redirty_page_for_writepage(wbc, page); |
| 63 | continue; |
| 64 | } |
| 65 | if (test_clear_buffer_dirty(bh)) { |
| 66 | mark_buffer_async_write(bh); |
| 67 | } else { |
| 68 | unlock_buffer(bh); |
| 69 | } |
| 70 | } while ((bh = bh->b_this_page) != head); |
| 71 | |
| 72 | /* |
| 73 | * The page and its buffers are protected by PageWriteback(), so we can |
| 74 | * drop the bh refcounts early. |
| 75 | */ |
| 76 | BUG_ON(PageWriteback(page)); |
| 77 | set_page_writeback(page); |
| 78 | |
| 79 | do { |
| 80 | struct buffer_head *next = bh->b_this_page; |
| 81 | if (buffer_async_write(bh)) { |
| 82 | submit_bh(write_op, bh); |
| 83 | nr_underway++; |
| 84 | } |
| 85 | bh = next; |
| 86 | } while (bh != head); |
| 87 | unlock_page(page); |
| 88 | |
Steven Whitehouse | 4a0f9a3 | 2009-04-20 08:16:26 +0100 | [diff] [blame] | 89 | if (nr_underway == 0) |
| 90 | end_page_writeback(page); |
| 91 | |
Bob Peterson | eaefbf9 | 2010-05-11 17:35:34 -0400 | [diff] [blame] | 92 | return 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 93 | } |
| 94 | |
Steven Whitehouse | 009d851 | 2009-12-08 12:12:13 +0000 | [diff] [blame] | 95 | const struct address_space_operations gfs2_meta_aops = { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 96 | .writepage = gfs2_aspace_writepage, |
Steven Whitehouse | 4340fe6 | 2006-07-11 09:46:33 -0400 | [diff] [blame] | 97 | .releasepage = gfs2_releasepage, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 98 | }; |
| 99 | |
| 100 | /** |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 101 | * gfs2_meta_sync - Sync all buffers associated with a glock |
| 102 | * @gl: The glock |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 103 | * |
| 104 | */ |
| 105 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 106 | void gfs2_meta_sync(struct gfs2_glock *gl) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 107 | { |
Steven Whitehouse | 009d851 | 2009-12-08 12:12:13 +0000 | [diff] [blame] | 108 | struct address_space *mapping = gfs2_glock2aspace(gl); |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 109 | int error; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 110 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 111 | filemap_fdatawrite(mapping); |
| 112 | error = filemap_fdatawait(mapping); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 113 | |
| 114 | if (error) |
| 115 | gfs2_io_error(gl->gl_sbd); |
| 116 | } |
| 117 | |
| 118 | /** |
Steven Whitehouse | 6802e34 | 2008-05-21 17:03:22 +0100 | [diff] [blame] | 119 | * gfs2_getbuf - Get a buffer with a given address space |
Steven Whitehouse | cb4c031 | 2006-11-23 11:16:32 -0500 | [diff] [blame] | 120 | * @gl: the glock |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 121 | * @blkno: the block number (filesystem scope) |
| 122 | * @create: 1 if the buffer should be created |
| 123 | * |
| 124 | * Returns: the buffer |
| 125 | */ |
| 126 | |
Steven Whitehouse | 6802e34 | 2008-05-21 17:03:22 +0100 | [diff] [blame] | 127 | struct buffer_head *gfs2_getbuf(struct gfs2_glock *gl, u64 blkno, int create) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 128 | { |
Steven Whitehouse | 009d851 | 2009-12-08 12:12:13 +0000 | [diff] [blame] | 129 | struct address_space *mapping = gfs2_glock2aspace(gl); |
Steven Whitehouse | cb4c031 | 2006-11-23 11:16:32 -0500 | [diff] [blame] | 130 | struct gfs2_sbd *sdp = gl->gl_sbd; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 131 | struct page *page; |
| 132 | struct buffer_head *bh; |
| 133 | unsigned int shift; |
| 134 | unsigned long index; |
| 135 | unsigned int bufnum; |
| 136 | |
| 137 | shift = PAGE_CACHE_SHIFT - sdp->sd_sb.sb_bsize_shift; |
| 138 | index = blkno >> shift; /* convert block to page */ |
| 139 | bufnum = blkno - (index << shift); /* block buf index within page */ |
| 140 | |
| 141 | if (create) { |
| 142 | for (;;) { |
Steven Whitehouse | cb4c031 | 2006-11-23 11:16:32 -0500 | [diff] [blame] | 143 | page = grab_cache_page(mapping, index); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 144 | if (page) |
| 145 | break; |
| 146 | yield(); |
| 147 | } |
| 148 | } else { |
Steven Whitehouse | cb4c031 | 2006-11-23 11:16:32 -0500 | [diff] [blame] | 149 | page = find_lock_page(mapping, index); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 150 | if (!page) |
| 151 | return NULL; |
| 152 | } |
| 153 | |
| 154 | if (!page_has_buffers(page)) |
| 155 | create_empty_buffers(page, sdp->sd_sb.sb_bsize, 0); |
| 156 | |
| 157 | /* Locate header for our buffer within our page */ |
| 158 | for (bh = page_buffers(page); bufnum--; bh = bh->b_this_page) |
| 159 | /* Do nothing */; |
| 160 | get_bh(bh); |
| 161 | |
| 162 | if (!buffer_mapped(bh)) |
| 163 | map_bh(bh, sdp->sd_vfs, blkno); |
| 164 | |
| 165 | unlock_page(page); |
| 166 | mark_page_accessed(page); |
| 167 | page_cache_release(page); |
| 168 | |
| 169 | return bh; |
| 170 | } |
| 171 | |
| 172 | static void meta_prep_new(struct buffer_head *bh) |
| 173 | { |
| 174 | struct gfs2_meta_header *mh = (struct gfs2_meta_header *)bh->b_data; |
| 175 | |
| 176 | lock_buffer(bh); |
| 177 | clear_buffer_dirty(bh); |
| 178 | set_buffer_uptodate(bh); |
| 179 | unlock_buffer(bh); |
| 180 | |
| 181 | mh->mh_magic = cpu_to_be32(GFS2_MAGIC); |
| 182 | } |
| 183 | |
| 184 | /** |
| 185 | * gfs2_meta_new - Get a block |
| 186 | * @gl: The glock associated with this block |
| 187 | * @blkno: The block number |
| 188 | * |
| 189 | * Returns: The buffer |
| 190 | */ |
| 191 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 192 | struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, u64 blkno) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 193 | { |
| 194 | struct buffer_head *bh; |
Steven Whitehouse | 6802e34 | 2008-05-21 17:03:22 +0100 | [diff] [blame] | 195 | bh = gfs2_getbuf(gl, blkno, CREATE); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 196 | meta_prep_new(bh); |
| 197 | return bh; |
| 198 | } |
| 199 | |
| 200 | /** |
| 201 | * gfs2_meta_read - Read a block from disk |
| 202 | * @gl: The glock covering the block |
| 203 | * @blkno: The block number |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 204 | * @flags: flags |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 205 | * @bhp: the place where the buffer is returned (NULL on failure) |
| 206 | * |
| 207 | * Returns: errno |
| 208 | */ |
| 209 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 210 | int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 211 | struct buffer_head **bhp) |
| 212 | { |
Steven Whitehouse | c969f58c | 2009-04-07 14:13:01 +0100 | [diff] [blame] | 213 | struct gfs2_sbd *sdp = gl->gl_sbd; |
| 214 | struct buffer_head *bh; |
| 215 | |
Masatake YAMATO | 44b8db1 | 2012-06-18 16:31:31 +0900 | [diff] [blame] | 216 | if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) { |
| 217 | *bhp = NULL; |
Steven Whitehouse | c969f58c | 2009-04-07 14:13:01 +0100 | [diff] [blame] | 218 | return -EIO; |
Masatake YAMATO | 44b8db1 | 2012-06-18 16:31:31 +0900 | [diff] [blame] | 219 | } |
Steven Whitehouse | c969f58c | 2009-04-07 14:13:01 +0100 | [diff] [blame] | 220 | |
| 221 | *bhp = bh = gfs2_getbuf(gl, blkno, CREATE); |
| 222 | |
| 223 | lock_buffer(bh); |
| 224 | if (buffer_uptodate(bh)) { |
| 225 | unlock_buffer(bh); |
| 226 | return 0; |
| 227 | } |
| 228 | bh->b_end_io = end_buffer_read_sync; |
| 229 | get_bh(bh); |
Christoph Hellwig | 65299a3 | 2011-08-23 14:50:29 +0200 | [diff] [blame] | 230 | submit_bh(READ_SYNC | REQ_META | REQ_PRIO, bh); |
Steven Whitehouse | c969f58c | 2009-04-07 14:13:01 +0100 | [diff] [blame] | 231 | if (!(flags & DIO_WAIT)) |
| 232 | return 0; |
| 233 | |
| 234 | wait_on_buffer(bh); |
| 235 | if (unlikely(!buffer_uptodate(bh))) { |
| 236 | struct gfs2_trans *tr = current->journal_info; |
| 237 | if (tr && tr->tr_touched) |
| 238 | gfs2_io_error_bh(sdp, bh); |
| 239 | brelse(bh); |
Masatake YAMATO | 44b8db1 | 2012-06-18 16:31:31 +0900 | [diff] [blame] | 240 | *bhp = NULL; |
Steven Whitehouse | c969f58c | 2009-04-07 14:13:01 +0100 | [diff] [blame] | 241 | return -EIO; |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 242 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 243 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 244 | return 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | /** |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 248 | * gfs2_meta_wait - Reread a block from disk |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 249 | * @sdp: the filesystem |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 250 | * @bh: The block to wait for |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 251 | * |
| 252 | * Returns: errno |
| 253 | */ |
| 254 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 255 | int gfs2_meta_wait(struct gfs2_sbd *sdp, struct buffer_head *bh) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 256 | { |
| 257 | if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) |
| 258 | return -EIO; |
| 259 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 260 | wait_on_buffer(bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 261 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 262 | if (!buffer_uptodate(bh)) { |
| 263 | struct gfs2_trans *tr = current->journal_info; |
| 264 | if (tr && tr->tr_touched) |
| 265 | gfs2_io_error_bh(sdp, bh); |
| 266 | return -EIO; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 267 | } |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 268 | if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) |
| 269 | return -EIO; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 270 | |
| 271 | return 0; |
| 272 | } |
| 273 | |
Steven Whitehouse | 16615be | 2007-09-17 10:59:52 +0100 | [diff] [blame] | 274 | void gfs2_remove_from_journal(struct buffer_head *bh, struct gfs2_trans *tr, int meta) |
| 275 | { |
Steven Whitehouse | 009d851 | 2009-12-08 12:12:13 +0000 | [diff] [blame] | 276 | struct address_space *mapping = bh->b_page->mapping; |
| 277 | struct gfs2_sbd *sdp = gfs2_mapping2sbd(mapping); |
Steven Whitehouse | 16615be | 2007-09-17 10:59:52 +0100 | [diff] [blame] | 278 | struct gfs2_bufdata *bd = bh->b_private; |
Steven Whitehouse | 009d851 | 2009-12-08 12:12:13 +0000 | [diff] [blame] | 279 | |
Steven Whitehouse | 16615be | 2007-09-17 10:59:52 +0100 | [diff] [blame] | 280 | if (test_clear_buffer_pinned(bh)) { |
Steven Whitehouse | 627c10b | 2011-04-14 14:09:52 +0100 | [diff] [blame] | 281 | trace_gfs2_pin(bd, 0); |
Benjamin Marzinski | 5e687ea | 2010-05-04 14:29:16 -0500 | [diff] [blame] | 282 | atomic_dec(&sdp->sd_log_pinned); |
Bob Peterson | c0752aa | 2012-05-01 12:00:34 -0400 | [diff] [blame] | 283 | list_del_init(&bd->bd_list); |
Steven Whitehouse | 16615be | 2007-09-17 10:59:52 +0100 | [diff] [blame] | 284 | if (meta) { |
| 285 | gfs2_assert_warn(sdp, sdp->sd_log_num_buf); |
| 286 | sdp->sd_log_num_buf--; |
| 287 | tr->tr_num_buf_rm++; |
| 288 | } else { |
| 289 | gfs2_assert_warn(sdp, sdp->sd_log_num_databuf); |
| 290 | sdp->sd_log_num_databuf--; |
| 291 | tr->tr_num_databuf_rm++; |
| 292 | } |
| 293 | tr->tr_touched = 1; |
| 294 | brelse(bh); |
| 295 | } |
| 296 | if (bd) { |
Steven Whitehouse | c618e87 | 2011-03-14 12:40:29 +0000 | [diff] [blame] | 297 | spin_lock(&sdp->sd_ail_lock); |
Benjamin Marzinski | 16ca941 | 2013-04-05 20:31:46 -0500 | [diff] [blame] | 298 | if (bd->bd_tr) { |
Steven Whitehouse | 16615be | 2007-09-17 10:59:52 +0100 | [diff] [blame] | 299 | gfs2_trans_add_revoke(sdp, bd); |
| 300 | } |
Steven Whitehouse | c618e87 | 2011-03-14 12:40:29 +0000 | [diff] [blame] | 301 | spin_unlock(&sdp->sd_ail_lock); |
Steven Whitehouse | 16615be | 2007-09-17 10:59:52 +0100 | [diff] [blame] | 302 | } |
| 303 | clear_buffer_dirty(bh); |
| 304 | clear_buffer_uptodate(bh); |
| 305 | } |
| 306 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 307 | /** |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 308 | * gfs2_meta_wipe - make inode's buffers so they aren't dirty/pinned anymore |
| 309 | * @ip: the inode who owns the buffers |
| 310 | * @bstart: the first buffer in the run |
| 311 | * @blen: the number of buffers in the run |
| 312 | * |
| 313 | */ |
| 314 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 315 | void gfs2_meta_wipe(struct gfs2_inode *ip, u64 bstart, u32 blen) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 316 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 317 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 318 | struct buffer_head *bh; |
| 319 | |
| 320 | while (blen) { |
Steven Whitehouse | 6802e34 | 2008-05-21 17:03:22 +0100 | [diff] [blame] | 321 | bh = gfs2_getbuf(ip->i_gl, bstart, NO_CREATE); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 322 | if (bh) { |
Steven Whitehouse | 1ad38c4 | 2007-09-03 11:01:33 +0100 | [diff] [blame] | 323 | lock_buffer(bh); |
| 324 | gfs2_log_lock(sdp); |
Steven Whitehouse | 16615be | 2007-09-17 10:59:52 +0100 | [diff] [blame] | 325 | gfs2_remove_from_journal(bh, current->journal_info, 1); |
Steven Whitehouse | 1ad38c4 | 2007-09-03 11:01:33 +0100 | [diff] [blame] | 326 | gfs2_log_unlock(sdp); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 327 | unlock_buffer(bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 328 | brelse(bh); |
| 329 | } |
| 330 | |
| 331 | bstart++; |
| 332 | blen--; |
| 333 | } |
| 334 | } |
| 335 | |
| 336 | /** |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 337 | * gfs2_meta_indirect_buffer - Get a metadata buffer |
| 338 | * @ip: The GFS2 inode |
| 339 | * @height: The level of this buf in the metadata (indir addr) tree (if any) |
| 340 | * @num: The block number (device relative) of the buffer |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 341 | * @bhp: the buffer is returned here |
| 342 | * |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 343 | * Returns: errno |
| 344 | */ |
| 345 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 346 | int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, u64 num, |
Bob Peterson | f2f9c81 | 2012-05-10 08:33:55 -0400 | [diff] [blame] | 347 | struct buffer_head **bhp) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 348 | { |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 349 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
| 350 | struct gfs2_glock *gl = ip->i_gl; |
Steven Whitehouse | f91a0d3 | 2007-10-15 16:29:05 +0100 | [diff] [blame] | 351 | struct buffer_head *bh; |
| 352 | int ret = 0; |
Bob Peterson | f2f9c81 | 2012-05-10 08:33:55 -0400 | [diff] [blame] | 353 | u32 mtype = height ? GFS2_METATYPE_IN : GFS2_METATYPE_DI; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 354 | |
Bob Peterson | f2f9c81 | 2012-05-10 08:33:55 -0400 | [diff] [blame] | 355 | ret = gfs2_meta_read(gl, num, DIO_WAIT, &bh); |
| 356 | if (ret == 0 && gfs2_metatype_check(sdp, bh, mtype)) { |
| 357 | brelse(bh); |
| 358 | ret = -EIO; |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 359 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 360 | *bhp = bh; |
Steven Whitehouse | f91a0d3 | 2007-10-15 16:29:05 +0100 | [diff] [blame] | 361 | return ret; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 362 | } |
| 363 | |
| 364 | /** |
| 365 | * gfs2_meta_ra - start readahead on an extent of a file |
| 366 | * @gl: the glock the blocks belong to |
| 367 | * @dblock: the starting disk block |
| 368 | * @extlen: the number of blocks in the extent |
| 369 | * |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 370 | * returns: the first buffer in the extent |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 371 | */ |
| 372 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 373 | struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 374 | { |
| 375 | struct gfs2_sbd *sdp = gl->gl_sbd; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 376 | struct buffer_head *first_bh, *bh; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 377 | u32 max_ra = gfs2_tune_get(sdp, gt_max_readahead) >> |
Steven Whitehouse | 568f4c9 | 2006-02-27 12:00:42 -0500 | [diff] [blame] | 378 | sdp->sd_sb.sb_bsize_shift; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 379 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 380 | BUG_ON(!extlen); |
| 381 | |
| 382 | if (max_ra < 1) |
| 383 | max_ra = 1; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 384 | if (extlen > max_ra) |
| 385 | extlen = max_ra; |
| 386 | |
Steven Whitehouse | 6802e34 | 2008-05-21 17:03:22 +0100 | [diff] [blame] | 387 | first_bh = gfs2_getbuf(gl, dblock, CREATE); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 388 | |
| 389 | if (buffer_uptodate(first_bh)) |
| 390 | goto out; |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 391 | if (!buffer_locked(first_bh)) |
Steven Whitehouse | 20ed053 | 2011-10-31 09:52:02 +0000 | [diff] [blame] | 392 | ll_rw_block(READ_SYNC | REQ_META, 1, &first_bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 393 | |
| 394 | dblock++; |
| 395 | extlen--; |
| 396 | |
| 397 | while (extlen) { |
Steven Whitehouse | 6802e34 | 2008-05-21 17:03:22 +0100 | [diff] [blame] | 398 | bh = gfs2_getbuf(gl, dblock, CREATE); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 399 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 400 | if (!buffer_uptodate(bh) && !buffer_locked(bh)) |
Steven Whitehouse | 20ed053 | 2011-10-31 09:52:02 +0000 | [diff] [blame] | 401 | ll_rw_block(READA | REQ_META, 1, &bh); |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 402 | brelse(bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 403 | dblock++; |
| 404 | extlen--; |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 405 | if (!buffer_locked(first_bh) && buffer_uptodate(first_bh)) |
| 406 | goto out; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 407 | } |
| 408 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 409 | wait_on_buffer(first_bh); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 410 | out: |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 411 | return first_bh; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 412 | } |
| 413 | |