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 | 4340fe6 | 2006-07-11 09:46:33 -0400 | [diff] [blame] | 34 | #include "ops_address.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 | int err; |
| 39 | struct buffer_head *bh, *head; |
| 40 | int nr_underway = 0; |
| 41 | int write_op = (1 << BIO_RW_META) | ((wbc->sync_mode == WB_SYNC_ALL ? |
| 42 | WRITE_SYNC_PLUG : WRITE)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 43 | |
Steven Whitehouse | 4a0f9a3 | 2009-04-20 08:16:26 +0100 | [diff] [blame^] | 44 | BUG_ON(!PageLocked(page)); |
| 45 | BUG_ON(!page_has_buffers(page)); |
| 46 | |
| 47 | head = page_buffers(page); |
| 48 | bh = head; |
| 49 | |
| 50 | do { |
| 51 | if (!buffer_mapped(bh)) |
| 52 | continue; |
| 53 | /* |
| 54 | * If it's a fully non-blocking write attempt and we cannot |
| 55 | * lock the buffer then redirty the page. Note that this can |
| 56 | * potentially cause a busy-wait loop from pdflush and kswapd |
| 57 | * activity, but those code paths have their own higher-level |
| 58 | * throttling. |
| 59 | */ |
| 60 | if (wbc->sync_mode != WB_SYNC_NONE || !wbc->nonblocking) { |
| 61 | lock_buffer(bh); |
| 62 | } else if (!trylock_buffer(bh)) { |
| 63 | redirty_page_for_writepage(wbc, page); |
| 64 | continue; |
| 65 | } |
| 66 | if (test_clear_buffer_dirty(bh)) { |
| 67 | mark_buffer_async_write(bh); |
| 68 | } else { |
| 69 | unlock_buffer(bh); |
| 70 | } |
| 71 | } while ((bh = bh->b_this_page) != head); |
| 72 | |
| 73 | /* |
| 74 | * The page and its buffers are protected by PageWriteback(), so we can |
| 75 | * drop the bh refcounts early. |
| 76 | */ |
| 77 | BUG_ON(PageWriteback(page)); |
| 78 | set_page_writeback(page); |
| 79 | |
| 80 | do { |
| 81 | struct buffer_head *next = bh->b_this_page; |
| 82 | if (buffer_async_write(bh)) { |
| 83 | submit_bh(write_op, bh); |
| 84 | nr_underway++; |
| 85 | } |
| 86 | bh = next; |
| 87 | } while (bh != head); |
| 88 | unlock_page(page); |
| 89 | |
| 90 | err = 0; |
| 91 | if (nr_underway == 0) |
| 92 | end_page_writeback(page); |
| 93 | |
| 94 | return err; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 95 | } |
| 96 | |
Steven Whitehouse | 66de045 | 2006-07-03 13:37:30 -0400 | [diff] [blame] | 97 | static const struct address_space_operations aspace_aops = { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 98 | .writepage = gfs2_aspace_writepage, |
Steven Whitehouse | 4340fe6 | 2006-07-11 09:46:33 -0400 | [diff] [blame] | 99 | .releasepage = gfs2_releasepage, |
Steven Whitehouse | 52d4c74 | 2007-11-01 09:34:14 +0000 | [diff] [blame] | 100 | .sync_page = block_sync_page, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 101 | }; |
| 102 | |
| 103 | /** |
| 104 | * gfs2_aspace_get - Create and initialize a struct inode structure |
| 105 | * @sdp: the filesystem the aspace is in |
| 106 | * |
| 107 | * Right now a struct inode is just a struct inode. Maybe Linux |
| 108 | * will supply a more lightweight address space construct (that works) |
| 109 | * in the future. |
| 110 | * |
| 111 | * Make sure pages/buffers in this aspace aren't in high memory. |
| 112 | * |
| 113 | * Returns: the aspace |
| 114 | */ |
| 115 | |
| 116 | struct inode *gfs2_aspace_get(struct gfs2_sbd *sdp) |
| 117 | { |
| 118 | struct inode *aspace; |
Bob Peterson | 091806ed | 2008-04-29 12:35:48 -0500 | [diff] [blame] | 119 | struct gfs2_inode *ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 120 | |
| 121 | aspace = new_inode(sdp->sd_vfs); |
| 122 | if (aspace) { |
Steven Whitehouse | f3bba03 | 2006-07-11 09:50:54 -0400 | [diff] [blame] | 123 | mapping_set_gfp_mask(aspace->i_mapping, GFP_NOFS); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 124 | aspace->i_mapping->a_ops = &aspace_aops; |
| 125 | aspace->i_size = ~0ULL; |
Bob Peterson | 091806ed | 2008-04-29 12:35:48 -0500 | [diff] [blame] | 126 | ip = GFS2_I(aspace); |
| 127 | clear_bit(GIF_USER, &ip->i_flags); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 128 | insert_inode_hash(aspace); |
| 129 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 130 | return aspace; |
| 131 | } |
| 132 | |
| 133 | void gfs2_aspace_put(struct inode *aspace) |
| 134 | { |
| 135 | remove_inode_hash(aspace); |
| 136 | iput(aspace); |
| 137 | } |
| 138 | |
| 139 | /** |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 140 | * gfs2_meta_sync - Sync all buffers associated with a glock |
| 141 | * @gl: The glock |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 142 | * |
| 143 | */ |
| 144 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 145 | void gfs2_meta_sync(struct gfs2_glock *gl) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 146 | { |
| 147 | struct address_space *mapping = gl->gl_aspace->i_mapping; |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 148 | int error; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 149 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 150 | filemap_fdatawrite(mapping); |
| 151 | error = filemap_fdatawait(mapping); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 152 | |
| 153 | if (error) |
| 154 | gfs2_io_error(gl->gl_sbd); |
| 155 | } |
| 156 | |
| 157 | /** |
Steven Whitehouse | 6802e34 | 2008-05-21 17:03:22 +0100 | [diff] [blame] | 158 | * gfs2_getbuf - Get a buffer with a given address space |
Steven Whitehouse | cb4c031 | 2006-11-23 11:16:32 -0500 | [diff] [blame] | 159 | * @gl: the glock |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 160 | * @blkno: the block number (filesystem scope) |
| 161 | * @create: 1 if the buffer should be created |
| 162 | * |
| 163 | * Returns: the buffer |
| 164 | */ |
| 165 | |
Steven Whitehouse | 6802e34 | 2008-05-21 17:03:22 +0100 | [diff] [blame] | 166 | 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] | 167 | { |
Steven Whitehouse | cb4c031 | 2006-11-23 11:16:32 -0500 | [diff] [blame] | 168 | struct address_space *mapping = gl->gl_aspace->i_mapping; |
| 169 | struct gfs2_sbd *sdp = gl->gl_sbd; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 170 | struct page *page; |
| 171 | struct buffer_head *bh; |
| 172 | unsigned int shift; |
| 173 | unsigned long index; |
| 174 | unsigned int bufnum; |
| 175 | |
| 176 | shift = PAGE_CACHE_SHIFT - sdp->sd_sb.sb_bsize_shift; |
| 177 | index = blkno >> shift; /* convert block to page */ |
| 178 | bufnum = blkno - (index << shift); /* block buf index within page */ |
| 179 | |
| 180 | if (create) { |
| 181 | for (;;) { |
Steven Whitehouse | cb4c031 | 2006-11-23 11:16:32 -0500 | [diff] [blame] | 182 | page = grab_cache_page(mapping, index); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 183 | if (page) |
| 184 | break; |
| 185 | yield(); |
| 186 | } |
| 187 | } else { |
Steven Whitehouse | cb4c031 | 2006-11-23 11:16:32 -0500 | [diff] [blame] | 188 | page = find_lock_page(mapping, index); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 189 | if (!page) |
| 190 | return NULL; |
| 191 | } |
| 192 | |
| 193 | if (!page_has_buffers(page)) |
| 194 | create_empty_buffers(page, sdp->sd_sb.sb_bsize, 0); |
| 195 | |
| 196 | /* Locate header for our buffer within our page */ |
| 197 | for (bh = page_buffers(page); bufnum--; bh = bh->b_this_page) |
| 198 | /* Do nothing */; |
| 199 | get_bh(bh); |
| 200 | |
| 201 | if (!buffer_mapped(bh)) |
| 202 | map_bh(bh, sdp->sd_vfs, blkno); |
| 203 | |
| 204 | unlock_page(page); |
| 205 | mark_page_accessed(page); |
| 206 | page_cache_release(page); |
| 207 | |
| 208 | return bh; |
| 209 | } |
| 210 | |
| 211 | static void meta_prep_new(struct buffer_head *bh) |
| 212 | { |
| 213 | struct gfs2_meta_header *mh = (struct gfs2_meta_header *)bh->b_data; |
| 214 | |
| 215 | lock_buffer(bh); |
| 216 | clear_buffer_dirty(bh); |
| 217 | set_buffer_uptodate(bh); |
| 218 | unlock_buffer(bh); |
| 219 | |
| 220 | mh->mh_magic = cpu_to_be32(GFS2_MAGIC); |
| 221 | } |
| 222 | |
| 223 | /** |
| 224 | * gfs2_meta_new - Get a block |
| 225 | * @gl: The glock associated with this block |
| 226 | * @blkno: The block number |
| 227 | * |
| 228 | * Returns: The buffer |
| 229 | */ |
| 230 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 231 | struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, u64 blkno) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 232 | { |
| 233 | struct buffer_head *bh; |
Steven Whitehouse | 6802e34 | 2008-05-21 17:03:22 +0100 | [diff] [blame] | 234 | bh = gfs2_getbuf(gl, blkno, CREATE); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 235 | meta_prep_new(bh); |
| 236 | return bh; |
| 237 | } |
| 238 | |
| 239 | /** |
| 240 | * gfs2_meta_read - Read a block from disk |
| 241 | * @gl: The glock covering the block |
| 242 | * @blkno: The block number |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 243 | * @flags: flags |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 244 | * @bhp: the place where the buffer is returned (NULL on failure) |
| 245 | * |
| 246 | * Returns: errno |
| 247 | */ |
| 248 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 249 | int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 250 | struct buffer_head **bhp) |
| 251 | { |
Steven Whitehouse | c969f58 | 2009-04-07 14:13:01 +0100 | [diff] [blame] | 252 | struct gfs2_sbd *sdp = gl->gl_sbd; |
| 253 | struct buffer_head *bh; |
| 254 | |
| 255 | if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) |
| 256 | return -EIO; |
| 257 | |
| 258 | *bhp = bh = gfs2_getbuf(gl, blkno, CREATE); |
| 259 | |
| 260 | lock_buffer(bh); |
| 261 | if (buffer_uptodate(bh)) { |
| 262 | unlock_buffer(bh); |
| 263 | return 0; |
| 264 | } |
| 265 | bh->b_end_io = end_buffer_read_sync; |
| 266 | get_bh(bh); |
| 267 | submit_bh(READ_SYNC | (1 << BIO_RW_META), bh); |
| 268 | if (!(flags & DIO_WAIT)) |
| 269 | return 0; |
| 270 | |
| 271 | wait_on_buffer(bh); |
| 272 | if (unlikely(!buffer_uptodate(bh))) { |
| 273 | struct gfs2_trans *tr = current->journal_info; |
| 274 | if (tr && tr->tr_touched) |
| 275 | gfs2_io_error_bh(sdp, bh); |
| 276 | brelse(bh); |
| 277 | return -EIO; |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 278 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 279 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 280 | return 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 281 | } |
| 282 | |
| 283 | /** |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 284 | * gfs2_meta_wait - Reread a block from disk |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 285 | * @sdp: the filesystem |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 286 | * @bh: The block to wait for |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 287 | * |
| 288 | * Returns: errno |
| 289 | */ |
| 290 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 291 | int gfs2_meta_wait(struct gfs2_sbd *sdp, struct buffer_head *bh) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 292 | { |
| 293 | if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) |
| 294 | return -EIO; |
| 295 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 296 | wait_on_buffer(bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 297 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 298 | if (!buffer_uptodate(bh)) { |
| 299 | struct gfs2_trans *tr = current->journal_info; |
| 300 | if (tr && tr->tr_touched) |
| 301 | gfs2_io_error_bh(sdp, bh); |
| 302 | return -EIO; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 303 | } |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 304 | if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) |
| 305 | return -EIO; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 306 | |
| 307 | return 0; |
| 308 | } |
| 309 | |
| 310 | /** |
Steven Whitehouse | 586dfda | 2006-01-18 11:32:00 +0000 | [diff] [blame] | 311 | * gfs2_attach_bufdata - attach a struct gfs2_bufdata structure to a buffer |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 312 | * @gl: the glock the buffer belongs to |
| 313 | * @bh: The buffer to be attached to |
Steven Whitehouse | 586dfda | 2006-01-18 11:32:00 +0000 | [diff] [blame] | 314 | * @meta: Flag to indicate whether its metadata or not |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 315 | */ |
| 316 | |
Steven Whitehouse | 568f4c9 | 2006-02-27 12:00:42 -0500 | [diff] [blame] | 317 | void gfs2_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh, |
| 318 | int meta) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 319 | { |
| 320 | struct gfs2_bufdata *bd; |
| 321 | |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 322 | if (meta) |
| 323 | lock_page(bh->b_page); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 324 | |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 325 | if (bh->b_private) { |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 326 | if (meta) |
| 327 | unlock_page(bh->b_page); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 328 | return; |
| 329 | } |
| 330 | |
Bob Peterson | 3e5cd08 | 2008-01-16 08:45:39 -0600 | [diff] [blame] | 331 | bd = kmem_cache_zalloc(gfs2_bufdata_cachep, GFP_NOFS | __GFP_NOFAIL); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 332 | bd->bd_bh = bh; |
| 333 | bd->bd_gl = gl; |
| 334 | |
| 335 | INIT_LIST_HEAD(&bd->bd_list_tr); |
Steven Whitehouse | 82ffa51 | 2006-09-04 14:47:06 -0400 | [diff] [blame] | 336 | if (meta) |
Steven Whitehouse | 586dfda | 2006-01-18 11:32:00 +0000 | [diff] [blame] | 337 | lops_init_le(&bd->bd_le, &gfs2_buf_lops); |
Steven Whitehouse | 82ffa51 | 2006-09-04 14:47:06 -0400 | [diff] [blame] | 338 | else |
Steven Whitehouse | 586dfda | 2006-01-18 11:32:00 +0000 | [diff] [blame] | 339 | lops_init_le(&bd->bd_le, &gfs2_databuf_lops); |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 340 | bh->b_private = bd; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 341 | |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 342 | if (meta) |
| 343 | unlock_page(bh->b_page); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 344 | } |
| 345 | |
Steven Whitehouse | 16615be | 2007-09-17 10:59:52 +0100 | [diff] [blame] | 346 | void gfs2_remove_from_journal(struct buffer_head *bh, struct gfs2_trans *tr, int meta) |
| 347 | { |
| 348 | struct gfs2_sbd *sdp = GFS2_SB(bh->b_page->mapping->host); |
| 349 | struct gfs2_bufdata *bd = bh->b_private; |
| 350 | if (test_clear_buffer_pinned(bh)) { |
| 351 | list_del_init(&bd->bd_le.le_list); |
| 352 | if (meta) { |
| 353 | gfs2_assert_warn(sdp, sdp->sd_log_num_buf); |
| 354 | sdp->sd_log_num_buf--; |
| 355 | tr->tr_num_buf_rm++; |
| 356 | } else { |
| 357 | gfs2_assert_warn(sdp, sdp->sd_log_num_databuf); |
| 358 | sdp->sd_log_num_databuf--; |
| 359 | tr->tr_num_databuf_rm++; |
| 360 | } |
| 361 | tr->tr_touched = 1; |
| 362 | brelse(bh); |
| 363 | } |
| 364 | if (bd) { |
| 365 | if (bd->bd_ail) { |
Steven Whitehouse | f91a0d3 | 2007-10-15 16:29:05 +0100 | [diff] [blame] | 366 | gfs2_remove_from_ail(bd); |
Steven Whitehouse | 16615be | 2007-09-17 10:59:52 +0100 | [diff] [blame] | 367 | bh->b_private = NULL; |
| 368 | bd->bd_bh = NULL; |
| 369 | bd->bd_blkno = bh->b_blocknr; |
| 370 | gfs2_trans_add_revoke(sdp, bd); |
| 371 | } |
| 372 | } |
| 373 | clear_buffer_dirty(bh); |
| 374 | clear_buffer_uptodate(bh); |
| 375 | } |
| 376 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 377 | /** |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 378 | * gfs2_meta_wipe - make inode's buffers so they aren't dirty/pinned anymore |
| 379 | * @ip: the inode who owns the buffers |
| 380 | * @bstart: the first buffer in the run |
| 381 | * @blen: the number of buffers in the run |
| 382 | * |
| 383 | */ |
| 384 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 385 | void gfs2_meta_wipe(struct gfs2_inode *ip, u64 bstart, u32 blen) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 386 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 387 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 388 | struct buffer_head *bh; |
| 389 | |
| 390 | while (blen) { |
Steven Whitehouse | 6802e34 | 2008-05-21 17:03:22 +0100 | [diff] [blame] | 391 | bh = gfs2_getbuf(ip->i_gl, bstart, NO_CREATE); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 392 | if (bh) { |
Steven Whitehouse | 1ad38c4 | 2007-09-03 11:01:33 +0100 | [diff] [blame] | 393 | lock_buffer(bh); |
| 394 | gfs2_log_lock(sdp); |
Steven Whitehouse | 16615be | 2007-09-17 10:59:52 +0100 | [diff] [blame] | 395 | gfs2_remove_from_journal(bh, current->journal_info, 1); |
Steven Whitehouse | 1ad38c4 | 2007-09-03 11:01:33 +0100 | [diff] [blame] | 396 | gfs2_log_unlock(sdp); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 397 | unlock_buffer(bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 398 | brelse(bh); |
| 399 | } |
| 400 | |
| 401 | bstart++; |
| 402 | blen--; |
| 403 | } |
| 404 | } |
| 405 | |
| 406 | /** |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 407 | * gfs2_meta_indirect_buffer - Get a metadata buffer |
| 408 | * @ip: The GFS2 inode |
| 409 | * @height: The level of this buf in the metadata (indir addr) tree (if any) |
| 410 | * @num: The block number (device relative) of the buffer |
| 411 | * @new: Non-zero if we may create a new buffer |
| 412 | * @bhp: the buffer is returned here |
| 413 | * |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 414 | * Returns: errno |
| 415 | */ |
| 416 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 417 | int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, u64 num, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 418 | int new, struct buffer_head **bhp) |
| 419 | { |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 420 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
| 421 | struct gfs2_glock *gl = ip->i_gl; |
Steven Whitehouse | f91a0d3 | 2007-10-15 16:29:05 +0100 | [diff] [blame] | 422 | struct buffer_head *bh; |
| 423 | int ret = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 424 | |
| 425 | if (new) { |
Steven Whitehouse | f91a0d3 | 2007-10-15 16:29:05 +0100 | [diff] [blame] | 426 | BUG_ON(height == 0); |
| 427 | bh = gfs2_meta_new(gl, num); |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 428 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 429 | gfs2_metatype_set(bh, GFS2_METATYPE_IN, GFS2_FORMAT_IN); |
| 430 | gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 431 | } else { |
| 432 | u32 mtype = height ? GFS2_METATYPE_IN : GFS2_METATYPE_DI; |
Steven Whitehouse | f91a0d3 | 2007-10-15 16:29:05 +0100 | [diff] [blame] | 433 | ret = gfs2_meta_read(gl, num, DIO_WAIT, &bh); |
| 434 | if (ret == 0 && gfs2_metatype_check(sdp, bh, mtype)) { |
| 435 | brelse(bh); |
| 436 | ret = -EIO; |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 437 | } |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 438 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 439 | *bhp = bh; |
Steven Whitehouse | f91a0d3 | 2007-10-15 16:29:05 +0100 | [diff] [blame] | 440 | return ret; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 441 | } |
| 442 | |
| 443 | /** |
| 444 | * gfs2_meta_ra - start readahead on an extent of a file |
| 445 | * @gl: the glock the blocks belong to |
| 446 | * @dblock: the starting disk block |
| 447 | * @extlen: the number of blocks in the extent |
| 448 | * |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 449 | * returns: the first buffer in the extent |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 450 | */ |
| 451 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 452 | 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] | 453 | { |
| 454 | struct gfs2_sbd *sdp = gl->gl_sbd; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 455 | struct buffer_head *first_bh, *bh; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 456 | u32 max_ra = gfs2_tune_get(sdp, gt_max_readahead) >> |
Steven Whitehouse | 568f4c9 | 2006-02-27 12:00:42 -0500 | [diff] [blame] | 457 | sdp->sd_sb.sb_bsize_shift; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 458 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 459 | BUG_ON(!extlen); |
| 460 | |
| 461 | if (max_ra < 1) |
| 462 | max_ra = 1; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 463 | if (extlen > max_ra) |
| 464 | extlen = max_ra; |
| 465 | |
Steven Whitehouse | 6802e34 | 2008-05-21 17:03:22 +0100 | [diff] [blame] | 466 | first_bh = gfs2_getbuf(gl, dblock, CREATE); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 467 | |
| 468 | if (buffer_uptodate(first_bh)) |
| 469 | goto out; |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 470 | if (!buffer_locked(first_bh)) |
Steven Whitehouse | c969f58 | 2009-04-07 14:13:01 +0100 | [diff] [blame] | 471 | ll_rw_block(READ_SYNC | (1 << BIO_RW_META), 1, &first_bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 472 | |
| 473 | dblock++; |
| 474 | extlen--; |
| 475 | |
| 476 | while (extlen) { |
Steven Whitehouse | 6802e34 | 2008-05-21 17:03:22 +0100 | [diff] [blame] | 477 | bh = gfs2_getbuf(gl, dblock, CREATE); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 478 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 479 | if (!buffer_uptodate(bh) && !buffer_locked(bh)) |
| 480 | ll_rw_block(READA, 1, &bh); |
| 481 | brelse(bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 482 | dblock++; |
| 483 | extlen--; |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 484 | if (!buffer_locked(first_bh) && buffer_uptodate(first_bh)) |
| 485 | goto out; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 486 | } |
| 487 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 488 | wait_on_buffer(first_bh); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 489 | out: |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 490 | return first_bh; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 491 | } |
| 492 | |