Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 1 | /* |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 2 | * linux/fs/jbd2/commit.c |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 3 | * |
| 4 | * Written by Stephen C. Tweedie <sct@redhat.com>, 1998 |
| 5 | * |
| 6 | * Copyright 1998 Red Hat corp --- All Rights Reserved |
| 7 | * |
| 8 | * This file is part of the Linux kernel and is made available under |
| 9 | * the terms of the GNU General Public License, version 2, or at your |
| 10 | * option, any later version, incorporated herein by reference. |
| 11 | * |
| 12 | * Journal commit routines for the generic filesystem journaling code; |
| 13 | * part of the ext2fs journaling system. |
| 14 | */ |
| 15 | |
| 16 | #include <linux/time.h> |
| 17 | #include <linux/fs.h> |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 18 | #include <linux/jbd2.h> |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 19 | #include <linux/errno.h> |
| 20 | #include <linux/slab.h> |
| 21 | #include <linux/mm.h> |
| 22 | #include <linux/pagemap.h> |
Johann Lombardi | 8e85fb3 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 23 | #include <linux/jiffies.h> |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 24 | #include <linux/crc32.h> |
Aneesh Kumar K.V | cd1aac3 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 25 | #include <linux/writeback.h> |
| 26 | #include <linux/backing-dev.h> |
Theodore Ts'o | fd98496 | 2009-01-05 21:34:13 -0500 | [diff] [blame] | 27 | #include <linux/bio.h> |
Theodore Ts'o | 0e3d2a6 | 2009-09-11 09:30:12 -0400 | [diff] [blame] | 28 | #include <linux/blkdev.h> |
Brian King | 39e3ac2 | 2010-10-27 21:25:12 -0400 | [diff] [blame] | 29 | #include <linux/bitops.h> |
Theodore Ts'o | 879c5e6 | 2009-06-17 11:47:48 -0400 | [diff] [blame] | 30 | #include <trace/events/jbd2.h> |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 31 | |
| 32 | /* |
Jan Kara | b34090e | 2013-06-04 12:08:56 -0400 | [diff] [blame] | 33 | * IO end handler for temporary buffer_heads handling writes to the journal. |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 34 | */ |
| 35 | static void journal_end_buffer_io_sync(struct buffer_head *bh, int uptodate) |
| 36 | { |
Jan Kara | b34090e | 2013-06-04 12:08:56 -0400 | [diff] [blame] | 37 | struct buffer_head *orig_bh = bh->b_private; |
| 38 | |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 39 | BUFFER_TRACE(bh, ""); |
| 40 | if (uptodate) |
| 41 | set_buffer_uptodate(bh); |
| 42 | else |
| 43 | clear_buffer_uptodate(bh); |
Jan Kara | b34090e | 2013-06-04 12:08:56 -0400 | [diff] [blame] | 44 | if (orig_bh) { |
| 45 | clear_bit_unlock(BH_Shadow, &orig_bh->b_state); |
| 46 | smp_mb__after_clear_bit(); |
| 47 | wake_up_bit(&orig_bh->b_state, BH_Shadow); |
| 48 | } |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 49 | unlock_buffer(bh); |
| 50 | } |
| 51 | |
| 52 | /* |
Jan Kara | 87c89c2 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 53 | * When an ext4 file is truncated, it is possible that some pages are not |
| 54 | * successfully freed, because they are attached to a committing transaction. |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 55 | * After the transaction commits, these pages are left on the LRU, with no |
| 56 | * ->mapping, and with attached buffers. These pages are trivially reclaimable |
| 57 | * by the VM, but their apparent absence upsets the VM accounting, and it makes |
| 58 | * the numbers in /proc/meminfo look odd. |
| 59 | * |
| 60 | * So here, we have a buffer which has just come off the forget list. Look to |
| 61 | * see if we can strip all buffers from the backing page. |
| 62 | * |
| 63 | * Called under lock_journal(), and possibly under journal_datalist_lock. The |
| 64 | * caller provided us with a ref against the buffer, and we drop that here. |
| 65 | */ |
| 66 | static void release_buffer_page(struct buffer_head *bh) |
| 67 | { |
| 68 | struct page *page; |
| 69 | |
| 70 | if (buffer_dirty(bh)) |
| 71 | goto nope; |
| 72 | if (atomic_read(&bh->b_count) != 1) |
| 73 | goto nope; |
| 74 | page = bh->b_page; |
| 75 | if (!page) |
| 76 | goto nope; |
| 77 | if (page->mapping) |
| 78 | goto nope; |
| 79 | |
| 80 | /* OK, it's a truncated page */ |
Nick Piggin | 529ae9a | 2008-08-02 12:01:03 +0200 | [diff] [blame] | 81 | if (!trylock_page(page)) |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 82 | goto nope; |
| 83 | |
| 84 | page_cache_get(page); |
| 85 | __brelse(bh); |
| 86 | try_to_free_buffers(page); |
| 87 | unlock_page(page); |
| 88 | page_cache_release(page); |
| 89 | return; |
| 90 | |
| 91 | nope: |
| 92 | __brelse(bh); |
| 93 | } |
| 94 | |
Jan Kara | e5a120a | 2013-06-04 12:06:01 -0400 | [diff] [blame] | 95 | static void jbd2_commit_block_csum_set(journal_t *j, struct buffer_head *bh) |
Darrick J. Wong | 1f56c58 | 2012-05-27 08:10:25 -0400 | [diff] [blame] | 96 | { |
| 97 | struct commit_header *h; |
| 98 | __u32 csum; |
| 99 | |
| 100 | if (!JBD2_HAS_INCOMPAT_FEATURE(j, JBD2_FEATURE_INCOMPAT_CSUM_V2)) |
| 101 | return; |
| 102 | |
Jan Kara | e5a120a | 2013-06-04 12:06:01 -0400 | [diff] [blame] | 103 | h = (struct commit_header *)(bh->b_data); |
Darrick J. Wong | 1f56c58 | 2012-05-27 08:10:25 -0400 | [diff] [blame] | 104 | h->h_chksum_type = 0; |
| 105 | h->h_chksum_size = 0; |
| 106 | h->h_chksum[0] = 0; |
Jan Kara | e5a120a | 2013-06-04 12:06:01 -0400 | [diff] [blame] | 107 | csum = jbd2_chksum(j, j->j_csum_seed, bh->b_data, j->j_blocksize); |
Darrick J. Wong | 1f56c58 | 2012-05-27 08:10:25 -0400 | [diff] [blame] | 108 | h->h_chksum[0] = cpu_to_be32(csum); |
| 109 | } |
| 110 | |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 111 | /* |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 112 | * Done it all: now submit the commit record. We should have |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 113 | * cleaned up our previous buffers by now, so if we are in abort |
| 114 | * mode we can now just skip the rest of the journal write |
| 115 | * entirely. |
| 116 | * |
| 117 | * Returns 1 if the journal needs to be aborted or 0 on success |
| 118 | */ |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 119 | static int journal_submit_commit_record(journal_t *journal, |
| 120 | transaction_t *commit_transaction, |
| 121 | struct buffer_head **cbh, |
| 122 | __u32 crc32_sum) |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 123 | { |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 124 | struct commit_header *tmp; |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 125 | struct buffer_head *bh; |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 126 | int ret; |
Theodore Ts'o | 736603a | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 127 | struct timespec now = current_kernel_time(); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 128 | |
Zhang Huan | 6cba611 | 2011-04-05 19:16:20 -0400 | [diff] [blame] | 129 | *cbh = NULL; |
| 130 | |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 131 | if (is_journal_aborted(journal)) |
| 132 | return 0; |
| 133 | |
Jan Kara | e5a120a | 2013-06-04 12:06:01 -0400 | [diff] [blame] | 134 | bh = jbd2_journal_get_descriptor_buffer(journal); |
| 135 | if (!bh) |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 136 | return 1; |
| 137 | |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 138 | tmp = (struct commit_header *)bh->b_data; |
| 139 | tmp->h_magic = cpu_to_be32(JBD2_MAGIC_NUMBER); |
| 140 | tmp->h_blocktype = cpu_to_be32(JBD2_COMMIT_BLOCK); |
| 141 | tmp->h_sequence = cpu_to_be32(commit_transaction->t_tid); |
Theodore Ts'o | 736603a | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 142 | tmp->h_commit_sec = cpu_to_be64(now.tv_sec); |
| 143 | tmp->h_commit_nsec = cpu_to_be32(now.tv_nsec); |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 144 | |
| 145 | if (JBD2_HAS_COMPAT_FEATURE(journal, |
| 146 | JBD2_FEATURE_COMPAT_CHECKSUM)) { |
| 147 | tmp->h_chksum_type = JBD2_CRC32_CHKSUM; |
| 148 | tmp->h_chksum_size = JBD2_CRC32_CHKSUM_SIZE; |
| 149 | tmp->h_chksum[0] = cpu_to_be32(crc32_sum); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 150 | } |
Jan Kara | e5a120a | 2013-06-04 12:06:01 -0400 | [diff] [blame] | 151 | jbd2_commit_block_csum_set(journal, bh); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 152 | |
Jan Kara | e5a120a | 2013-06-04 12:06:01 -0400 | [diff] [blame] | 153 | BUFFER_TRACE(bh, "submit commit block"); |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 154 | lock_buffer(bh); |
Theodore Ts'o | 45a90bf | 2008-10-06 12:04:02 -0400 | [diff] [blame] | 155 | clear_buffer_dirty(bh); |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 156 | set_buffer_uptodate(bh); |
| 157 | bh->b_end_io = journal_end_buffer_io_sync; |
| 158 | |
| 159 | if (journal->j_flags & JBD2_BARRIER && |
Theodore Ts'o | 0e3d2a6 | 2009-09-11 09:30:12 -0400 | [diff] [blame] | 160 | !JBD2_HAS_INCOMPAT_FEATURE(journal, |
Christoph Hellwig | 9c35575 | 2010-08-18 05:29:17 -0400 | [diff] [blame] | 161 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) |
Jens Axboe | 721a960 | 2011-03-09 11:56:30 +0100 | [diff] [blame] | 162 | ret = submit_bh(WRITE_SYNC | WRITE_FLUSH_FUA, bh); |
Christoph Hellwig | 9c35575 | 2010-08-18 05:29:17 -0400 | [diff] [blame] | 163 | else |
Jens Axboe | 721a960 | 2011-03-09 11:56:30 +0100 | [diff] [blame] | 164 | ret = submit_bh(WRITE_SYNC, bh); |
Christoph Hellwig | 9c35575 | 2010-08-18 05:29:17 -0400 | [diff] [blame] | 165 | |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 166 | *cbh = bh; |
| 167 | return ret; |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 168 | } |
| 169 | |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 170 | /* |
| 171 | * This function along with journal_submit_commit_record |
| 172 | * allows to write the commit record asynchronously. |
| 173 | */ |
Theodore Ts'o | fd98496 | 2009-01-05 21:34:13 -0500 | [diff] [blame] | 174 | static int journal_wait_on_commit_record(journal_t *journal, |
| 175 | struct buffer_head *bh) |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 176 | { |
| 177 | int ret = 0; |
| 178 | |
| 179 | clear_buffer_dirty(bh); |
| 180 | wait_on_buffer(bh); |
| 181 | |
| 182 | if (unlikely(!buffer_uptodate(bh))) |
| 183 | ret = -EIO; |
| 184 | put_bh(bh); /* One for getblk() */ |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 185 | |
| 186 | return ret; |
| 187 | } |
| 188 | |
| 189 | /* |
Aneesh Kumar K.V | cd1aac3 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 190 | * write the filemap data using writepage() address_space_operations. |
| 191 | * We don't do block allocation here even for delalloc. We don't |
| 192 | * use writepages() because with dealyed allocation we may be doing |
| 193 | * block allocation in writepages(). |
| 194 | */ |
| 195 | static int journal_submit_inode_data_buffers(struct address_space *mapping) |
| 196 | { |
| 197 | int ret; |
| 198 | struct writeback_control wbc = { |
| 199 | .sync_mode = WB_SYNC_ALL, |
| 200 | .nr_to_write = mapping->nrpages * 2, |
| 201 | .range_start = 0, |
| 202 | .range_end = i_size_read(mapping->host), |
Aneesh Kumar K.V | cd1aac3 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 203 | }; |
| 204 | |
| 205 | ret = generic_writepages(mapping, &wbc); |
| 206 | return ret; |
| 207 | } |
| 208 | |
| 209 | /* |
Jan Kara | c851ed5 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 210 | * Submit all the data buffers of inode associated with the transaction to |
| 211 | * disk. |
| 212 | * |
| 213 | * We are in a committing transaction. Therefore no new inode can be added to |
| 214 | * our inode list. We use JI_COMMIT_RUNNING flag to protect inode we currently |
| 215 | * operate on from being released while we write out pages. |
| 216 | */ |
Aneesh Kumar K.V | cd1aac3 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 217 | static int journal_submit_data_buffers(journal_t *journal, |
Jan Kara | c851ed5 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 218 | transaction_t *commit_transaction) |
| 219 | { |
| 220 | struct jbd2_inode *jinode; |
| 221 | int err, ret = 0; |
| 222 | struct address_space *mapping; |
| 223 | |
| 224 | spin_lock(&journal->j_list_lock); |
| 225 | list_for_each_entry(jinode, &commit_transaction->t_inode_list, i_list) { |
| 226 | mapping = jinode->i_vfs_inode->i_mapping; |
Brian King | 39e3ac2 | 2010-10-27 21:25:12 -0400 | [diff] [blame] | 227 | set_bit(__JI_COMMIT_RUNNING, &jinode->i_flags); |
Jan Kara | c851ed5 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 228 | spin_unlock(&journal->j_list_lock); |
Aneesh Kumar K.V | cd1aac3 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 229 | /* |
| 230 | * submit the inode data buffers. We use writepage |
| 231 | * instead of writepages. Because writepages can do |
| 232 | * block allocation with delalloc. We need to write |
| 233 | * only allocated blocks here. |
| 234 | */ |
Theodore Ts'o | 879c5e6 | 2009-06-17 11:47:48 -0400 | [diff] [blame] | 235 | trace_jbd2_submit_inode_data(jinode->i_vfs_inode); |
Aneesh Kumar K.V | cd1aac3 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 236 | err = journal_submit_inode_data_buffers(mapping); |
Jan Kara | c851ed5 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 237 | if (!ret) |
| 238 | ret = err; |
| 239 | spin_lock(&journal->j_list_lock); |
| 240 | J_ASSERT(jinode->i_transaction == commit_transaction); |
Brian King | 39e3ac2 | 2010-10-27 21:25:12 -0400 | [diff] [blame] | 241 | clear_bit(__JI_COMMIT_RUNNING, &jinode->i_flags); |
| 242 | smp_mb__after_clear_bit(); |
Jan Kara | c851ed5 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 243 | wake_up_bit(&jinode->i_flags, __JI_COMMIT_RUNNING); |
| 244 | } |
| 245 | spin_unlock(&journal->j_list_lock); |
| 246 | return ret; |
| 247 | } |
| 248 | |
| 249 | /* |
| 250 | * Wait for data submitted for writeout, refile inodes to proper |
| 251 | * transaction if needed. |
| 252 | * |
| 253 | */ |
| 254 | static int journal_finish_inode_data_buffers(journal_t *journal, |
| 255 | transaction_t *commit_transaction) |
| 256 | { |
| 257 | struct jbd2_inode *jinode, *next_i; |
| 258 | int err, ret = 0; |
| 259 | |
Aneesh Kumar K.V | cd1aac3 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 260 | /* For locking, see the comment in journal_submit_data_buffers() */ |
Jan Kara | c851ed5 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 261 | spin_lock(&journal->j_list_lock); |
| 262 | list_for_each_entry(jinode, &commit_transaction->t_inode_list, i_list) { |
Brian King | 39e3ac2 | 2010-10-27 21:25:12 -0400 | [diff] [blame] | 263 | set_bit(__JI_COMMIT_RUNNING, &jinode->i_flags); |
Jan Kara | c851ed5 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 264 | spin_unlock(&journal->j_list_lock); |
| 265 | err = filemap_fdatawait(jinode->i_vfs_inode->i_mapping); |
Hidehiro Kawai | e9e34f4 | 2008-07-31 22:26:04 -0400 | [diff] [blame] | 266 | if (err) { |
| 267 | /* |
| 268 | * Because AS_EIO is cleared by |
Christoph Hellwig | 94004ed | 2009-09-30 22:16:33 +0200 | [diff] [blame] | 269 | * filemap_fdatawait_range(), set it again so |
Hidehiro Kawai | e9e34f4 | 2008-07-31 22:26:04 -0400 | [diff] [blame] | 270 | * that user process can get -EIO from fsync(). |
| 271 | */ |
| 272 | set_bit(AS_EIO, |
| 273 | &jinode->i_vfs_inode->i_mapping->flags); |
| 274 | |
| 275 | if (!ret) |
| 276 | ret = err; |
| 277 | } |
Jan Kara | c851ed5 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 278 | spin_lock(&journal->j_list_lock); |
Brian King | 39e3ac2 | 2010-10-27 21:25:12 -0400 | [diff] [blame] | 279 | clear_bit(__JI_COMMIT_RUNNING, &jinode->i_flags); |
| 280 | smp_mb__after_clear_bit(); |
Jan Kara | c851ed5 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 281 | wake_up_bit(&jinode->i_flags, __JI_COMMIT_RUNNING); |
| 282 | } |
| 283 | |
| 284 | /* Now refile inode to proper lists */ |
| 285 | list_for_each_entry_safe(jinode, next_i, |
| 286 | &commit_transaction->t_inode_list, i_list) { |
| 287 | list_del(&jinode->i_list); |
| 288 | if (jinode->i_next_transaction) { |
| 289 | jinode->i_transaction = jinode->i_next_transaction; |
| 290 | jinode->i_next_transaction = NULL; |
| 291 | list_add(&jinode->i_list, |
| 292 | &jinode->i_transaction->t_inode_list); |
| 293 | } else { |
| 294 | jinode->i_transaction = NULL; |
| 295 | } |
| 296 | } |
| 297 | spin_unlock(&journal->j_list_lock); |
| 298 | |
| 299 | return ret; |
| 300 | } |
| 301 | |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 302 | static __u32 jbd2_checksum_data(__u32 crc32_sum, struct buffer_head *bh) |
| 303 | { |
| 304 | struct page *page = bh->b_page; |
| 305 | char *addr; |
| 306 | __u32 checksum; |
| 307 | |
Cong Wang | 303a8f2 | 2011-11-25 23:14:31 +0800 | [diff] [blame] | 308 | addr = kmap_atomic(page); |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 309 | checksum = crc32_be(crc32_sum, |
| 310 | (void *)(addr + offset_in_page(bh->b_data)), bh->b_size); |
Cong Wang | 303a8f2 | 2011-11-25 23:14:31 +0800 | [diff] [blame] | 311 | kunmap_atomic(addr); |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 312 | |
| 313 | return checksum; |
| 314 | } |
| 315 | |
| 316 | static void write_tag_block(int tag_bytes, journal_block_tag_t *tag, |
Mingming Cao | 18eba7a | 2006-10-11 01:21:13 -0700 | [diff] [blame] | 317 | unsigned long long block) |
Zach Brown | b517bea | 2006-10-11 01:21:08 -0700 | [diff] [blame] | 318 | { |
| 319 | tag->t_blocknr = cpu_to_be32(block & (u32)~0); |
Mingming Cao | cd02ff0 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 320 | if (tag_bytes > JBD2_TAG_SIZE32) |
Zach Brown | b517bea | 2006-10-11 01:21:08 -0700 | [diff] [blame] | 321 | tag->t_blocknr_high = cpu_to_be32((block >> 31) >> 1); |
| 322 | } |
| 323 | |
Darrick J. Wong | 3caa487 | 2012-05-27 08:10:22 -0400 | [diff] [blame] | 324 | static void jbd2_descr_block_csum_set(journal_t *j, |
Jan Kara | e5a120a | 2013-06-04 12:06:01 -0400 | [diff] [blame] | 325 | struct buffer_head *bh) |
Darrick J. Wong | 3caa487 | 2012-05-27 08:10:22 -0400 | [diff] [blame] | 326 | { |
| 327 | struct jbd2_journal_block_tail *tail; |
| 328 | __u32 csum; |
| 329 | |
| 330 | if (!JBD2_HAS_INCOMPAT_FEATURE(j, JBD2_FEATURE_INCOMPAT_CSUM_V2)) |
| 331 | return; |
| 332 | |
Jan Kara | e5a120a | 2013-06-04 12:06:01 -0400 | [diff] [blame] | 333 | tail = (struct jbd2_journal_block_tail *)(bh->b_data + j->j_blocksize - |
Darrick J. Wong | 3caa487 | 2012-05-27 08:10:22 -0400 | [diff] [blame] | 334 | sizeof(struct jbd2_journal_block_tail)); |
| 335 | tail->t_checksum = 0; |
Jan Kara | e5a120a | 2013-06-04 12:06:01 -0400 | [diff] [blame] | 336 | csum = jbd2_chksum(j, j->j_csum_seed, bh->b_data, j->j_blocksize); |
Darrick J. Wong | 3caa487 | 2012-05-27 08:10:22 -0400 | [diff] [blame] | 337 | tail->t_checksum = cpu_to_be32(csum); |
| 338 | } |
| 339 | |
Darrick J. Wong | c390087 | 2012-05-27 08:12:12 -0400 | [diff] [blame] | 340 | static void jbd2_block_tag_csum_set(journal_t *j, journal_block_tag_t *tag, |
| 341 | struct buffer_head *bh, __u32 sequence) |
| 342 | { |
| 343 | struct page *page = bh->b_page; |
| 344 | __u8 *addr; |
Darrick J. Wong | eee06c5 | 2013-05-28 07:31:59 -0400 | [diff] [blame] | 345 | __u32 csum32; |
Darrick J. Wong | c390087 | 2012-05-27 08:12:12 -0400 | [diff] [blame] | 346 | |
| 347 | if (!JBD2_HAS_INCOMPAT_FEATURE(j, JBD2_FEATURE_INCOMPAT_CSUM_V2)) |
| 348 | return; |
| 349 | |
| 350 | sequence = cpu_to_be32(sequence); |
Cong Wang | 906adea | 2012-06-23 11:24:48 +0800 | [diff] [blame] | 351 | addr = kmap_atomic(page); |
Darrick J. Wong | eee06c5 | 2013-05-28 07:31:59 -0400 | [diff] [blame] | 352 | csum32 = jbd2_chksum(j, j->j_csum_seed, (__u8 *)&sequence, |
| 353 | sizeof(sequence)); |
| 354 | csum32 = jbd2_chksum(j, csum32, addr + offset_in_page(bh->b_data), |
| 355 | bh->b_size); |
Cong Wang | 906adea | 2012-06-23 11:24:48 +0800 | [diff] [blame] | 356 | kunmap_atomic(addr); |
Darrick J. Wong | c390087 | 2012-05-27 08:12:12 -0400 | [diff] [blame] | 357 | |
Darrick J. Wong | eee06c5 | 2013-05-28 07:31:59 -0400 | [diff] [blame] | 358 | /* We only have space to store the lower 16 bits of the crc32c. */ |
| 359 | tag->t_checksum = cpu_to_be16(csum32); |
Darrick J. Wong | c390087 | 2012-05-27 08:12:12 -0400 | [diff] [blame] | 360 | } |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 361 | /* |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 362 | * jbd2_journal_commit_transaction |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 363 | * |
| 364 | * The primary function for committing a transaction to the log. This |
| 365 | * function is called by the journal thread to begin a complete commit. |
| 366 | */ |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 367 | void jbd2_journal_commit_transaction(journal_t *journal) |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 368 | { |
Johann Lombardi | 8e85fb3 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 369 | struct transaction_stats_s stats; |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 370 | transaction_t *commit_transaction; |
Jan Kara | e5a120a | 2013-06-04 12:06:01 -0400 | [diff] [blame] | 371 | struct journal_head *jh; |
| 372 | struct buffer_head *descriptor; |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 373 | struct buffer_head **wbuf = journal->j_wbuf; |
| 374 | int bufs; |
| 375 | int flags; |
| 376 | int err; |
Mingming Cao | 18eba7a | 2006-10-11 01:21:13 -0700 | [diff] [blame] | 377 | unsigned long long blocknr; |
Josef Bacik | e07f718 | 2008-11-26 01:14:26 -0500 | [diff] [blame] | 378 | ktime_t start_time; |
| 379 | u64 commit_time; |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 380 | char *tagp = NULL; |
| 381 | journal_header_t *header; |
| 382 | journal_block_tag_t *tag = NULL; |
| 383 | int space_left = 0; |
| 384 | int first_tag = 0; |
| 385 | int tag_flag; |
Dmitry Monakhov | 794446c | 2013-04-03 22:06:52 -0400 | [diff] [blame] | 386 | int i; |
Zach Brown | b517bea | 2006-10-11 01:21:08 -0700 | [diff] [blame] | 387 | int tag_bytes = journal_tag_bytes(journal); |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 388 | struct buffer_head *cbh = NULL; /* For transactional checksums */ |
| 389 | __u32 crc32_sum = ~0; |
Jens Axboe | 82f04ab | 2011-03-17 11:01:52 +0100 | [diff] [blame] | 390 | struct blk_plug plug; |
Jan Kara | 3339578 | 2012-03-13 22:45:38 -0400 | [diff] [blame] | 391 | /* Tail of the journal */ |
| 392 | unsigned long first_block; |
| 393 | tid_t first_tid; |
| 394 | int update_tail; |
Darrick J. Wong | 3caa487 | 2012-05-27 08:10:22 -0400 | [diff] [blame] | 395 | int csum_size = 0; |
Jan Kara | f5113ef | 2013-06-04 12:01:45 -0400 | [diff] [blame] | 396 | LIST_HEAD(io_bufs); |
Jan Kara | e5a120a | 2013-06-04 12:06:01 -0400 | [diff] [blame] | 397 | LIST_HEAD(log_bufs); |
Darrick J. Wong | 3caa487 | 2012-05-27 08:10:22 -0400 | [diff] [blame] | 398 | |
| 399 | if (JBD2_HAS_INCOMPAT_FEATURE(journal, JBD2_FEATURE_INCOMPAT_CSUM_V2)) |
| 400 | csum_size = sizeof(struct jbd2_journal_block_tail); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 401 | |
| 402 | /* |
| 403 | * First job: lock down the current transaction and wait for |
| 404 | * all outstanding updates to complete. |
| 405 | */ |
| 406 | |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 407 | /* Do we need to erase the effects of a prior jbd2_journal_flush? */ |
| 408 | if (journal->j_flags & JBD2_FLUSHED) { |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 409 | jbd_debug(3, "super block updated\n"); |
Jan Kara | a78bb11 | 2012-03-13 15:43:04 -0400 | [diff] [blame] | 410 | mutex_lock(&journal->j_checkpoint_mutex); |
Jan Kara | 79feb52 | 2012-03-13 22:22:54 -0400 | [diff] [blame] | 411 | /* |
| 412 | * We hold j_checkpoint_mutex so tail cannot change under us. |
| 413 | * We don't need any special data guarantees for writing sb |
| 414 | * since journal is empty and it is ok for write to be |
| 415 | * flushed only with transaction commit. |
| 416 | */ |
| 417 | jbd2_journal_update_sb_log_tail(journal, |
| 418 | journal->j_tail_sequence, |
| 419 | journal->j_tail, |
| 420 | WRITE_SYNC); |
Jan Kara | a78bb11 | 2012-03-13 15:43:04 -0400 | [diff] [blame] | 421 | mutex_unlock(&journal->j_checkpoint_mutex); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 422 | } else { |
| 423 | jbd_debug(3, "superblock not updated\n"); |
| 424 | } |
| 425 | |
| 426 | J_ASSERT(journal->j_running_transaction != NULL); |
| 427 | J_ASSERT(journal->j_committing_transaction == NULL); |
| 428 | |
| 429 | commit_transaction = journal->j_running_transaction; |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 430 | |
Theodore Ts'o | 879c5e6 | 2009-06-17 11:47:48 -0400 | [diff] [blame] | 431 | trace_jbd2_start_commit(journal, commit_transaction); |
Eryu Guan | f2a4452 | 2011-11-01 19:09:18 -0400 | [diff] [blame] | 432 | jbd_debug(1, "JBD2: starting commit of transaction %d\n", |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 433 | commit_transaction->t_tid); |
| 434 | |
Theodore Ts'o | a931da6 | 2010-08-03 21:35:12 -0400 | [diff] [blame] | 435 | write_lock(&journal->j_state_lock); |
Paul Gortmaker | 3ca841c | 2013-06-12 22:46:35 -0400 | [diff] [blame] | 436 | J_ASSERT(commit_transaction->t_state == T_RUNNING); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 437 | commit_transaction->t_state = T_LOCKED; |
| 438 | |
Theodore Ts'o | 879c5e6 | 2009-06-17 11:47:48 -0400 | [diff] [blame] | 439 | trace_jbd2_commit_locking(journal, commit_transaction); |
Theodore Ts'o | bf69932 | 2009-09-30 00:32:06 -0400 | [diff] [blame] | 440 | stats.run.rs_wait = commit_transaction->t_max_wait; |
Theodore Ts'o | 9fff24a | 2013-02-06 22:30:23 -0500 | [diff] [blame] | 441 | stats.run.rs_request_delay = 0; |
Theodore Ts'o | bf69932 | 2009-09-30 00:32:06 -0400 | [diff] [blame] | 442 | stats.run.rs_locked = jiffies; |
Theodore Ts'o | 9fff24a | 2013-02-06 22:30:23 -0500 | [diff] [blame] | 443 | if (commit_transaction->t_requested) |
| 444 | stats.run.rs_request_delay = |
| 445 | jbd2_time_diff(commit_transaction->t_requested, |
| 446 | stats.run.rs_locked); |
Theodore Ts'o | bf69932 | 2009-09-30 00:32:06 -0400 | [diff] [blame] | 447 | stats.run.rs_running = jbd2_time_diff(commit_transaction->t_start, |
| 448 | stats.run.rs_locked); |
Johann Lombardi | 8e85fb3 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 449 | |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 450 | spin_lock(&commit_transaction->t_handle_lock); |
Theodore Ts'o | a51dca9 | 2010-08-02 08:43:25 -0400 | [diff] [blame] | 451 | while (atomic_read(&commit_transaction->t_updates)) { |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 452 | DEFINE_WAIT(wait); |
| 453 | |
| 454 | prepare_to_wait(&journal->j_wait_updates, &wait, |
| 455 | TASK_UNINTERRUPTIBLE); |
Theodore Ts'o | a51dca9 | 2010-08-02 08:43:25 -0400 | [diff] [blame] | 456 | if (atomic_read(&commit_transaction->t_updates)) { |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 457 | spin_unlock(&commit_transaction->t_handle_lock); |
Theodore Ts'o | a931da6 | 2010-08-03 21:35:12 -0400 | [diff] [blame] | 458 | write_unlock(&journal->j_state_lock); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 459 | schedule(); |
Theodore Ts'o | a931da6 | 2010-08-03 21:35:12 -0400 | [diff] [blame] | 460 | write_lock(&journal->j_state_lock); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 461 | spin_lock(&commit_transaction->t_handle_lock); |
| 462 | } |
| 463 | finish_wait(&journal->j_wait_updates, &wait); |
| 464 | } |
| 465 | spin_unlock(&commit_transaction->t_handle_lock); |
| 466 | |
Theodore Ts'o | a51dca9 | 2010-08-02 08:43:25 -0400 | [diff] [blame] | 467 | J_ASSERT (atomic_read(&commit_transaction->t_outstanding_credits) <= |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 468 | journal->j_max_transaction_buffers); |
| 469 | |
| 470 | /* |
| 471 | * First thing we are allowed to do is to discard any remaining |
| 472 | * BJ_Reserved buffers. Note, it is _not_ permissible to assume |
| 473 | * that there are no such buffers: if a large filesystem |
| 474 | * operation like a truncate needs to split itself over multiple |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 475 | * transactions, then it may try to do a jbd2_journal_restart() while |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 476 | * there are still BJ_Reserved buffers outstanding. These must |
| 477 | * be released cleanly from the current transaction. |
| 478 | * |
| 479 | * In this case, the filesystem must still reserve write access |
| 480 | * again before modifying the buffer in the new transaction, but |
| 481 | * we do not require it to remember exactly which old buffers it |
| 482 | * has reserved. This is consistent with the existing behaviour |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 483 | * that multiple jbd2_journal_get_write_access() calls to the same |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 484 | * buffer are perfectly permissible. |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 485 | */ |
| 486 | while (commit_transaction->t_reserved_list) { |
| 487 | jh = commit_transaction->t_reserved_list; |
| 488 | JBUFFER_TRACE(jh, "reserved, unused: refile"); |
| 489 | /* |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 490 | * A jbd2_journal_get_undo_access()+jbd2_journal_release_buffer() may |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 491 | * leave undo-committed data. |
| 492 | */ |
| 493 | if (jh->b_committed_data) { |
| 494 | struct buffer_head *bh = jh2bh(jh); |
| 495 | |
| 496 | jbd_lock_bh_state(bh); |
Mingming Cao | af1e76d | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 497 | jbd2_free(jh->b_committed_data, bh->b_size); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 498 | jh->b_committed_data = NULL; |
| 499 | jbd_unlock_bh_state(bh); |
| 500 | } |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 501 | jbd2_journal_refile_buffer(journal, jh); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 502 | } |
| 503 | |
| 504 | /* |
| 505 | * Now try to drop any written-back buffers from the journal's |
| 506 | * checkpoint lists. We do this *before* commit because it potentially |
| 507 | * frees some memory |
| 508 | */ |
| 509 | spin_lock(&journal->j_list_lock); |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 510 | __jbd2_journal_clean_checkpoint_list(journal); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 511 | spin_unlock(&journal->j_list_lock); |
| 512 | |
Eryu Guan | f2a4452 | 2011-11-01 19:09:18 -0400 | [diff] [blame] | 513 | jbd_debug(3, "JBD2: commit phase 1\n"); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 514 | |
| 515 | /* |
Yongqiang Yang | 1ba3726 | 2011-12-28 17:46:46 -0500 | [diff] [blame] | 516 | * Clear revoked flag to reflect there is no revoked buffers |
| 517 | * in the next transaction which is going to be started. |
| 518 | */ |
| 519 | jbd2_clear_buffer_revoked_flags(journal); |
| 520 | |
| 521 | /* |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 522 | * Switch to a new revoke table. |
| 523 | */ |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 524 | jbd2_journal_switch_revoke_table(journal); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 525 | |
Jan Kara | 8f7d89f | 2013-06-04 12:35:11 -0400 | [diff] [blame] | 526 | /* |
| 527 | * Reserved credits cannot be claimed anymore, free them |
| 528 | */ |
| 529 | atomic_sub(atomic_read(&journal->j_reserved_credits), |
| 530 | &commit_transaction->t_outstanding_credits); |
| 531 | |
Theodore Ts'o | 879c5e6 | 2009-06-17 11:47:48 -0400 | [diff] [blame] | 532 | trace_jbd2_commit_flushing(journal, commit_transaction); |
Theodore Ts'o | bf69932 | 2009-09-30 00:32:06 -0400 | [diff] [blame] | 533 | stats.run.rs_flushing = jiffies; |
| 534 | stats.run.rs_locked = jbd2_time_diff(stats.run.rs_locked, |
| 535 | stats.run.rs_flushing); |
Johann Lombardi | 8e85fb3 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 536 | |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 537 | commit_transaction->t_state = T_FLUSH; |
| 538 | journal->j_committing_transaction = commit_transaction; |
| 539 | journal->j_running_transaction = NULL; |
Josef Bacik | e07f718 | 2008-11-26 01:14:26 -0500 | [diff] [blame] | 540 | start_time = ktime_get(); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 541 | commit_transaction->t_log_start = journal->j_head; |
| 542 | wake_up(&journal->j_wait_transaction_locked); |
Theodore Ts'o | a931da6 | 2010-08-03 21:35:12 -0400 | [diff] [blame] | 543 | write_unlock(&journal->j_state_lock); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 544 | |
Paul Gortmaker | cfc7bc8 | 2013-06-12 22:56:35 -0400 | [diff] [blame] | 545 | jbd_debug(3, "JBD2: commit phase 2a\n"); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 546 | |
| 547 | /* |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 548 | * Now start flushing things to disk, in the order they appear |
| 549 | * on the transaction lists. Data blocks go first. |
| 550 | */ |
Aneesh Kumar K.V | cd1aac3 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 551 | err = journal_submit_data_buffers(journal, commit_transaction); |
Jan Kara | c851ed5 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 552 | if (err) |
| 553 | jbd2_journal_abort(journal, err); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 554 | |
Jens Axboe | 82f04ab | 2011-03-17 11:01:52 +0100 | [diff] [blame] | 555 | blk_start_plug(&plug); |
Theodore Ts'o | 67c457a | 2009-04-14 07:50:56 -0400 | [diff] [blame] | 556 | jbd2_journal_write_revoke_records(journal, commit_transaction, |
Jan Kara | e5a120a | 2013-06-04 12:06:01 -0400 | [diff] [blame] | 557 | &log_bufs, WRITE_SYNC); |
Jens Axboe | 82f04ab | 2011-03-17 11:01:52 +0100 | [diff] [blame] | 558 | blk_finish_plug(&plug); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 559 | |
Paul Gortmaker | cfc7bc8 | 2013-06-12 22:56:35 -0400 | [diff] [blame] | 560 | jbd_debug(3, "JBD2: commit phase 2b\n"); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 561 | |
| 562 | /* |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 563 | * Way to go: we have now written out all of the data for a |
| 564 | * transaction! Now comes the tricky part: we need to write out |
| 565 | * metadata. Loop over the transaction's entire buffer list: |
| 566 | */ |
Theodore Ts'o | a931da6 | 2010-08-03 21:35:12 -0400 | [diff] [blame] | 567 | write_lock(&journal->j_state_lock); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 568 | commit_transaction->t_state = T_COMMIT; |
Theodore Ts'o | a931da6 | 2010-08-03 21:35:12 -0400 | [diff] [blame] | 569 | write_unlock(&journal->j_state_lock); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 570 | |
Theodore Ts'o | 879c5e6 | 2009-06-17 11:47:48 -0400 | [diff] [blame] | 571 | trace_jbd2_commit_logging(journal, commit_transaction); |
Theodore Ts'o | bf69932 | 2009-09-30 00:32:06 -0400 | [diff] [blame] | 572 | stats.run.rs_logging = jiffies; |
| 573 | stats.run.rs_flushing = jbd2_time_diff(stats.run.rs_flushing, |
| 574 | stats.run.rs_logging); |
Theodore Ts'o | a51dca9 | 2010-08-02 08:43:25 -0400 | [diff] [blame] | 575 | stats.run.rs_blocks = |
| 576 | atomic_read(&commit_transaction->t_outstanding_credits); |
Theodore Ts'o | bf69932 | 2009-09-30 00:32:06 -0400 | [diff] [blame] | 577 | stats.run.rs_blocks_logged = 0; |
Johann Lombardi | 8e85fb3 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 578 | |
Josef Bacik | 1dfc322 | 2008-04-17 10:38:59 -0400 | [diff] [blame] | 579 | J_ASSERT(commit_transaction->t_nr_buffers <= |
Theodore Ts'o | a51dca9 | 2010-08-02 08:43:25 -0400 | [diff] [blame] | 580 | atomic_read(&commit_transaction->t_outstanding_credits)); |
Josef Bacik | 1dfc322 | 2008-04-17 10:38:59 -0400 | [diff] [blame] | 581 | |
Jan Kara | 87c89c2 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 582 | err = 0; |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 583 | bufs = 0; |
Jan Kara | e5a120a | 2013-06-04 12:06:01 -0400 | [diff] [blame] | 584 | descriptor = NULL; |
Jens Axboe | 82f04ab | 2011-03-17 11:01:52 +0100 | [diff] [blame] | 585 | blk_start_plug(&plug); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 586 | while (commit_transaction->t_buffers) { |
| 587 | |
| 588 | /* Find the next buffer to be journaled... */ |
| 589 | |
| 590 | jh = commit_transaction->t_buffers; |
| 591 | |
| 592 | /* If we're in abort mode, we just un-journal the buffer and |
Hidehiro Kawai | 7ad7445 | 2008-10-10 20:29:31 -0400 | [diff] [blame] | 593 | release it. */ |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 594 | |
| 595 | if (is_journal_aborted(journal)) { |
Hidehiro Kawai | 7ad7445 | 2008-10-10 20:29:31 -0400 | [diff] [blame] | 596 | clear_buffer_jbddirty(jh2bh(jh)); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 597 | JBUFFER_TRACE(jh, "journal is aborting: refile"); |
Joel Becker | e06c822 | 2008-09-11 15:35:47 -0700 | [diff] [blame] | 598 | jbd2_buffer_abort_trigger(jh, |
| 599 | jh->b_frozen_data ? |
| 600 | jh->b_frozen_triggers : |
| 601 | jh->b_triggers); |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 602 | jbd2_journal_refile_buffer(journal, jh); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 603 | /* If that was the last one, we need to clean up |
| 604 | * any descriptor buffers which may have been |
| 605 | * already allocated, even if we are now |
| 606 | * aborting. */ |
| 607 | if (!commit_transaction->t_buffers) |
| 608 | goto start_journal_io; |
| 609 | continue; |
| 610 | } |
| 611 | |
| 612 | /* Make sure we have a descriptor block in which to |
| 613 | record the metadata buffer. */ |
| 614 | |
| 615 | if (!descriptor) { |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 616 | J_ASSERT (bufs == 0); |
| 617 | |
Eryu Guan | f2a4452 | 2011-11-01 19:09:18 -0400 | [diff] [blame] | 618 | jbd_debug(4, "JBD2: get descriptor\n"); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 619 | |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 620 | descriptor = jbd2_journal_get_descriptor_buffer(journal); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 621 | if (!descriptor) { |
Jan Kara | a7fa2ba | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 622 | jbd2_journal_abort(journal, -EIO); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 623 | continue; |
| 624 | } |
| 625 | |
Eryu Guan | f2a4452 | 2011-11-01 19:09:18 -0400 | [diff] [blame] | 626 | jbd_debug(4, "JBD2: got buffer %llu (%p)\n", |
Jan Kara | e5a120a | 2013-06-04 12:06:01 -0400 | [diff] [blame] | 627 | (unsigned long long)descriptor->b_blocknr, |
| 628 | descriptor->b_data); |
| 629 | header = (journal_header_t *)descriptor->b_data; |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 630 | header->h_magic = cpu_to_be32(JBD2_MAGIC_NUMBER); |
| 631 | header->h_blocktype = cpu_to_be32(JBD2_DESCRIPTOR_BLOCK); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 632 | header->h_sequence = cpu_to_be32(commit_transaction->t_tid); |
| 633 | |
Jan Kara | e5a120a | 2013-06-04 12:06:01 -0400 | [diff] [blame] | 634 | tagp = &descriptor->b_data[sizeof(journal_header_t)]; |
| 635 | space_left = descriptor->b_size - |
| 636 | sizeof(journal_header_t); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 637 | first_tag = 1; |
Jan Kara | e5a120a | 2013-06-04 12:06:01 -0400 | [diff] [blame] | 638 | set_buffer_jwrite(descriptor); |
| 639 | set_buffer_dirty(descriptor); |
| 640 | wbuf[bufs++] = descriptor; |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 641 | |
| 642 | /* Record it so that we can wait for IO |
| 643 | completion later */ |
Jan Kara | e5a120a | 2013-06-04 12:06:01 -0400 | [diff] [blame] | 644 | BUFFER_TRACE(descriptor, "ph3: file as descriptor"); |
| 645 | jbd2_file_log_bh(&log_bufs, descriptor); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 646 | } |
| 647 | |
| 648 | /* Where is the buffer to be written? */ |
| 649 | |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 650 | err = jbd2_journal_next_log_block(journal, &blocknr); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 651 | /* If the block mapping failed, just abandon the buffer |
| 652 | and repeat this loop: we'll fall into the |
| 653 | refile-on-abort condition above. */ |
| 654 | if (err) { |
Jan Kara | a7fa2ba | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 655 | jbd2_journal_abort(journal, err); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 656 | continue; |
| 657 | } |
| 658 | |
| 659 | /* |
| 660 | * start_this_handle() uses t_outstanding_credits to determine |
| 661 | * the free space in the log, but this counter is changed |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 662 | * by jbd2_journal_next_log_block() also. |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 663 | */ |
Theodore Ts'o | a51dca9 | 2010-08-02 08:43:25 -0400 | [diff] [blame] | 664 | atomic_dec(&commit_transaction->t_outstanding_credits); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 665 | |
| 666 | /* Bump b_count to prevent truncate from stumbling over |
| 667 | the shadowed buffer! @@@ This can go if we ever get |
Jan Kara | f5113ef | 2013-06-04 12:01:45 -0400 | [diff] [blame] | 668 | rid of the shadow pairing of buffers. */ |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 669 | atomic_inc(&jh2bh(jh)->b_count); |
| 670 | |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 671 | /* |
Jan Kara | f5113ef | 2013-06-04 12:01:45 -0400 | [diff] [blame] | 672 | * Make a temporary IO buffer with which to write it out |
| 673 | * (this will requeue the metadata buffer to BJ_Shadow). |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 674 | */ |
Jan Kara | f5113ef | 2013-06-04 12:01:45 -0400 | [diff] [blame] | 675 | set_bit(BH_JWrite, &jh2bh(jh)->b_state); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 676 | JBUFFER_TRACE(jh, "ph3: write metadata"); |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 677 | flags = jbd2_journal_write_metadata_buffer(commit_transaction, |
Jan Kara | f5113ef | 2013-06-04 12:01:45 -0400 | [diff] [blame] | 678 | jh, &wbuf[bufs], blocknr); |
Theodore Ts'o | e6ec116 | 2009-12-01 09:04:42 -0500 | [diff] [blame] | 679 | if (flags < 0) { |
| 680 | jbd2_journal_abort(journal, flags); |
| 681 | continue; |
| 682 | } |
Jan Kara | f5113ef | 2013-06-04 12:01:45 -0400 | [diff] [blame] | 683 | jbd2_file_log_bh(&io_bufs, wbuf[bufs]); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 684 | |
| 685 | /* Record the new block's tag in the current descriptor |
| 686 | buffer */ |
| 687 | |
| 688 | tag_flag = 0; |
| 689 | if (flags & 1) |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 690 | tag_flag |= JBD2_FLAG_ESCAPE; |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 691 | if (!first_tag) |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 692 | tag_flag |= JBD2_FLAG_SAME_UUID; |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 693 | |
| 694 | tag = (journal_block_tag_t *) tagp; |
Zach Brown | b517bea | 2006-10-11 01:21:08 -0700 | [diff] [blame] | 695 | write_tag_block(tag_bytes, tag, jh2bh(jh)->b_blocknr); |
Darrick J. Wong | 8f888ef | 2012-05-22 22:43:41 -0400 | [diff] [blame] | 696 | tag->t_flags = cpu_to_be16(tag_flag); |
Jan Kara | f5113ef | 2013-06-04 12:01:45 -0400 | [diff] [blame] | 697 | jbd2_block_tag_csum_set(journal, tag, wbuf[bufs], |
Darrick J. Wong | c390087 | 2012-05-27 08:12:12 -0400 | [diff] [blame] | 698 | commit_transaction->t_tid); |
Zach Brown | b517bea | 2006-10-11 01:21:08 -0700 | [diff] [blame] | 699 | tagp += tag_bytes; |
| 700 | space_left -= tag_bytes; |
Jan Kara | f5113ef | 2013-06-04 12:01:45 -0400 | [diff] [blame] | 701 | bufs++; |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 702 | |
| 703 | if (first_tag) { |
| 704 | memcpy (tagp, journal->j_uuid, 16); |
| 705 | tagp += 16; |
| 706 | space_left -= 16; |
| 707 | first_tag = 0; |
| 708 | } |
| 709 | |
| 710 | /* If there's no more to do, or if the descriptor is full, |
| 711 | let the IO rip! */ |
| 712 | |
| 713 | if (bufs == journal->j_wbufsize || |
| 714 | commit_transaction->t_buffers == NULL || |
Darrick J. Wong | 3caa487 | 2012-05-27 08:10:22 -0400 | [diff] [blame] | 715 | space_left < tag_bytes + 16 + csum_size) { |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 716 | |
Eryu Guan | f2a4452 | 2011-11-01 19:09:18 -0400 | [diff] [blame] | 717 | jbd_debug(4, "JBD2: Submit %d IOs\n", bufs); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 718 | |
| 719 | /* Write an end-of-descriptor marker before |
| 720 | submitting the IOs. "tag" still points to |
| 721 | the last tag we set up. */ |
| 722 | |
Darrick J. Wong | 8f888ef | 2012-05-22 22:43:41 -0400 | [diff] [blame] | 723 | tag->t_flags |= cpu_to_be16(JBD2_FLAG_LAST_TAG); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 724 | |
Darrick J. Wong | 3caa487 | 2012-05-27 08:10:22 -0400 | [diff] [blame] | 725 | jbd2_descr_block_csum_set(journal, descriptor); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 726 | start_journal_io: |
| 727 | for (i = 0; i < bufs; i++) { |
| 728 | struct buffer_head *bh = wbuf[i]; |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 729 | /* |
| 730 | * Compute checksum. |
| 731 | */ |
| 732 | if (JBD2_HAS_COMPAT_FEATURE(journal, |
| 733 | JBD2_FEATURE_COMPAT_CHECKSUM)) { |
| 734 | crc32_sum = |
| 735 | jbd2_checksum_data(crc32_sum, bh); |
| 736 | } |
| 737 | |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 738 | lock_buffer(bh); |
| 739 | clear_buffer_dirty(bh); |
| 740 | set_buffer_uptodate(bh); |
| 741 | bh->b_end_io = journal_end_buffer_io_sync; |
Jens Axboe | 82f04ab | 2011-03-17 11:01:52 +0100 | [diff] [blame] | 742 | submit_bh(WRITE_SYNC, bh); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 743 | } |
| 744 | cond_resched(); |
Theodore Ts'o | bf69932 | 2009-09-30 00:32:06 -0400 | [diff] [blame] | 745 | stats.run.rs_blocks_logged += bufs; |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 746 | |
| 747 | /* Force a new descriptor to be generated next |
| 748 | time round the loop. */ |
| 749 | descriptor = NULL; |
| 750 | bufs = 0; |
| 751 | } |
| 752 | } |
| 753 | |
Jan Kara | c851ed5 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 754 | err = journal_finish_inode_data_buffers(journal, commit_transaction); |
Hidehiro Kawai | e9e34f4 | 2008-07-31 22:26:04 -0400 | [diff] [blame] | 755 | if (err) { |
Hidehiro Kawai | e9e34f4 | 2008-07-31 22:26:04 -0400 | [diff] [blame] | 756 | printk(KERN_WARNING |
| 757 | "JBD2: Detected IO errors while flushing file data " |
Theodore Ts'o | 0549676 | 2008-09-16 14:36:17 -0400 | [diff] [blame] | 758 | "on %s\n", journal->j_devname); |
Hidehiro Kawai | 5bf5683 | 2008-10-10 22:12:43 -0400 | [diff] [blame] | 759 | if (journal->j_flags & JBD2_ABORT_ON_SYNCDATA_ERR) |
| 760 | jbd2_journal_abort(journal, err); |
Hidehiro Kawai | e9e34f4 | 2008-07-31 22:26:04 -0400 | [diff] [blame] | 761 | err = 0; |
| 762 | } |
Jan Kara | c851ed5 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 763 | |
Jan Kara | 3339578 | 2012-03-13 22:45:38 -0400 | [diff] [blame] | 764 | /* |
| 765 | * Get current oldest transaction in the log before we issue flush |
| 766 | * to the filesystem device. After the flush we can be sure that |
| 767 | * blocks of all older transactions are checkpointed to persistent |
| 768 | * storage and we will be safe to update journal start in the |
| 769 | * superblock with the numbers we get here. |
| 770 | */ |
| 771 | update_tail = |
| 772 | jbd2_journal_get_log_tail(journal, &first_tid, &first_block); |
| 773 | |
Jan Kara | bbd2be3 | 2011-05-24 11:59:18 -0400 | [diff] [blame] | 774 | write_lock(&journal->j_state_lock); |
Jan Kara | 3339578 | 2012-03-13 22:45:38 -0400 | [diff] [blame] | 775 | if (update_tail) { |
| 776 | long freed = first_block - journal->j_tail; |
| 777 | |
| 778 | if (first_block < journal->j_tail) |
| 779 | freed += journal->j_last - journal->j_first; |
| 780 | /* Update tail only if we free significant amount of space */ |
| 781 | if (freed < journal->j_maxlen / 4) |
| 782 | update_tail = 0; |
| 783 | } |
Jan Kara | bbd2be3 | 2011-05-24 11:59:18 -0400 | [diff] [blame] | 784 | J_ASSERT(commit_transaction->t_state == T_COMMIT); |
| 785 | commit_transaction->t_state = T_COMMIT_DFLUSH; |
| 786 | write_unlock(&journal->j_state_lock); |
Jan Kara | 3339578 | 2012-03-13 22:45:38 -0400 | [diff] [blame] | 787 | |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 788 | /* |
| 789 | * If the journal is not located on the file system device, |
| 790 | * then we must flush the file system device before we issue |
| 791 | * the commit record |
| 792 | */ |
Jan Kara | 81be12c | 2011-05-24 11:52:40 -0400 | [diff] [blame] | 793 | if (commit_transaction->t_need_data_flush && |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 794 | (journal->j_fs_dev != journal->j_dev) && |
| 795 | (journal->j_flags & JBD2_BARRIER)) |
Shaohua Li | 99aa784 | 2012-04-13 10:27:35 +0800 | [diff] [blame] | 796 | blkdev_issue_flush(journal->j_fs_dev, GFP_NOFS, NULL); |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 797 | |
| 798 | /* Done it all: now write the commit record asynchronously. */ |
| 799 | if (JBD2_HAS_INCOMPAT_FEATURE(journal, |
| 800 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) { |
| 801 | err = journal_submit_commit_record(journal, commit_transaction, |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 802 | &cbh, crc32_sum); |
| 803 | if (err) |
| 804 | __jbd2_journal_abort_hard(journal); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 805 | } |
| 806 | |
Jens Axboe | 82f04ab | 2011-03-17 11:01:52 +0100 | [diff] [blame] | 807 | blk_finish_plug(&plug); |
| 808 | |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 809 | /* Lo and behold: we have just managed to send a transaction to |
| 810 | the log. Before we can commit it, wait for the IO so far to |
| 811 | complete. Control buffers being written are on the |
| 812 | transaction's t_log_list queue, and metadata buffers are on |
Jan Kara | f5113ef | 2013-06-04 12:01:45 -0400 | [diff] [blame] | 813 | the io_bufs list. |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 814 | |
| 815 | Wait for the buffers in reverse order. That way we are |
| 816 | less likely to be woken up until all IOs have completed, and |
| 817 | so we incur less scheduling load. |
| 818 | */ |
| 819 | |
Eryu Guan | f2a4452 | 2011-11-01 19:09:18 -0400 | [diff] [blame] | 820 | jbd_debug(3, "JBD2: commit phase 3\n"); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 821 | |
Jan Kara | f5113ef | 2013-06-04 12:01:45 -0400 | [diff] [blame] | 822 | while (!list_empty(&io_bufs)) { |
| 823 | struct buffer_head *bh = list_entry(io_bufs.prev, |
| 824 | struct buffer_head, |
| 825 | b_assoc_buffers); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 826 | |
Jan Kara | f5113ef | 2013-06-04 12:01:45 -0400 | [diff] [blame] | 827 | wait_on_buffer(bh); |
| 828 | cond_resched(); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 829 | |
| 830 | if (unlikely(!buffer_uptodate(bh))) |
| 831 | err = -EIO; |
Jan Kara | f5113ef | 2013-06-04 12:01:45 -0400 | [diff] [blame] | 832 | jbd2_unfile_log_bh(bh); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 833 | |
| 834 | /* |
Jan Kara | f5113ef | 2013-06-04 12:01:45 -0400 | [diff] [blame] | 835 | * The list contains temporary buffer heads created by |
| 836 | * jbd2_journal_write_metadata_buffer(). |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 837 | */ |
| 838 | BUFFER_TRACE(bh, "dumping temporary bh"); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 839 | __brelse(bh); |
| 840 | J_ASSERT_BH(bh, atomic_read(&bh->b_count) == 0); |
| 841 | free_buffer_head(bh); |
| 842 | |
Jan Kara | f5113ef | 2013-06-04 12:01:45 -0400 | [diff] [blame] | 843 | /* We also have to refile the corresponding shadowed buffer */ |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 844 | jh = commit_transaction->t_shadow_list->b_tprev; |
| 845 | bh = jh2bh(jh); |
Jan Kara | f5113ef | 2013-06-04 12:01:45 -0400 | [diff] [blame] | 846 | clear_buffer_jwrite(bh); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 847 | J_ASSERT_BH(bh, buffer_jbddirty(bh)); |
Jan Kara | b34090e | 2013-06-04 12:08:56 -0400 | [diff] [blame] | 848 | J_ASSERT_BH(bh, !buffer_shadow(bh)); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 849 | |
| 850 | /* The metadata is now released for reuse, but we need |
| 851 | to remember it against this transaction so that when |
| 852 | we finally commit, we can do any checkpointing |
| 853 | required. */ |
| 854 | JBUFFER_TRACE(jh, "file as BJ_Forget"); |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 855 | jbd2_journal_file_buffer(jh, commit_transaction, BJ_Forget); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 856 | JBUFFER_TRACE(jh, "brelse shadowed buffer"); |
| 857 | __brelse(bh); |
| 858 | } |
| 859 | |
| 860 | J_ASSERT (commit_transaction->t_shadow_list == NULL); |
| 861 | |
Eryu Guan | f2a4452 | 2011-11-01 19:09:18 -0400 | [diff] [blame] | 862 | jbd_debug(3, "JBD2: commit phase 4\n"); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 863 | |
| 864 | /* Here we wait for the revoke record and descriptor record buffers */ |
Jan Kara | e5a120a | 2013-06-04 12:06:01 -0400 | [diff] [blame] | 865 | while (!list_empty(&log_bufs)) { |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 866 | struct buffer_head *bh; |
| 867 | |
Jan Kara | e5a120a | 2013-06-04 12:06:01 -0400 | [diff] [blame] | 868 | bh = list_entry(log_bufs.prev, struct buffer_head, b_assoc_buffers); |
| 869 | wait_on_buffer(bh); |
| 870 | cond_resched(); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 871 | |
| 872 | if (unlikely(!buffer_uptodate(bh))) |
| 873 | err = -EIO; |
| 874 | |
| 875 | BUFFER_TRACE(bh, "ph5: control buffer writeout done: unfile"); |
| 876 | clear_buffer_jwrite(bh); |
Jan Kara | e5a120a | 2013-06-04 12:06:01 -0400 | [diff] [blame] | 877 | jbd2_unfile_log_bh(bh); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 878 | __brelse(bh); /* One for getblk */ |
| 879 | /* AKPM: bforget here */ |
| 880 | } |
| 881 | |
Hidehiro Kawai | 77e841d | 2008-10-12 16:39:16 -0400 | [diff] [blame] | 882 | if (err) |
| 883 | jbd2_journal_abort(journal, err); |
| 884 | |
Eryu Guan | f2a4452 | 2011-11-01 19:09:18 -0400 | [diff] [blame] | 885 | jbd_debug(3, "JBD2: commit phase 5\n"); |
Jan Kara | bbd2be3 | 2011-05-24 11:59:18 -0400 | [diff] [blame] | 886 | write_lock(&journal->j_state_lock); |
| 887 | J_ASSERT(commit_transaction->t_state == T_COMMIT_DFLUSH); |
| 888 | commit_transaction->t_state = T_COMMIT_JFLUSH; |
| 889 | write_unlock(&journal->j_state_lock); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 890 | |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 891 | if (!JBD2_HAS_INCOMPAT_FEATURE(journal, |
Theodore Ts'o | 0e3d2a6 | 2009-09-11 09:30:12 -0400 | [diff] [blame] | 892 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) { |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 893 | err = journal_submit_commit_record(journal, commit_transaction, |
| 894 | &cbh, crc32_sum); |
| 895 | if (err) |
| 896 | __jbd2_journal_abort_hard(journal); |
| 897 | } |
Zhang Huan | 6cba611 | 2011-04-05 19:16:20 -0400 | [diff] [blame] | 898 | if (cbh) |
Theodore Ts'o | fd98496 | 2009-01-05 21:34:13 -0500 | [diff] [blame] | 899 | err = journal_wait_on_commit_record(journal, cbh); |
Jan Kara | f73bee4 | 2010-08-18 15:56:56 +0200 | [diff] [blame] | 900 | if (JBD2_HAS_INCOMPAT_FEATURE(journal, |
| 901 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT) && |
| 902 | journal->j_flags & JBD2_BARRIER) { |
Shaohua Li | 99aa784 | 2012-04-13 10:27:35 +0800 | [diff] [blame] | 903 | blkdev_issue_flush(journal->j_dev, GFP_NOFS, NULL); |
Jan Kara | f73bee4 | 2010-08-18 15:56:56 +0200 | [diff] [blame] | 904 | } |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 905 | |
| 906 | if (err) |
Jan Kara | a7fa2ba | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 907 | jbd2_journal_abort(journal, err); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 908 | |
Jan Kara | 3339578 | 2012-03-13 22:45:38 -0400 | [diff] [blame] | 909 | /* |
| 910 | * Now disk caches for filesystem device are flushed so we are safe to |
| 911 | * erase checkpointed transactions from the log by updating journal |
| 912 | * superblock. |
| 913 | */ |
| 914 | if (update_tail) |
| 915 | jbd2_update_log_tail(journal, first_tid, first_block); |
| 916 | |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 917 | /* End of a transaction! Finally, we can do checkpoint |
| 918 | processing: any buffers committed as a result of this |
| 919 | transaction can be removed from any checkpoint list it was on |
| 920 | before. */ |
| 921 | |
Eryu Guan | f2a4452 | 2011-11-01 19:09:18 -0400 | [diff] [blame] | 922 | jbd_debug(3, "JBD2: commit phase 6\n"); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 923 | |
Jan Kara | c851ed5 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 924 | J_ASSERT(list_empty(&commit_transaction->t_inode_list)); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 925 | J_ASSERT(commit_transaction->t_buffers == NULL); |
| 926 | J_ASSERT(commit_transaction->t_checkpoint_list == NULL); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 927 | J_ASSERT(commit_transaction->t_shadow_list == NULL); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 928 | |
| 929 | restart_loop: |
| 930 | /* |
| 931 | * As there are other places (journal_unmap_buffer()) adding buffers |
| 932 | * to this list we have to be careful and hold the j_list_lock. |
| 933 | */ |
| 934 | spin_lock(&journal->j_list_lock); |
| 935 | while (commit_transaction->t_forget) { |
| 936 | transaction_t *cp_transaction; |
| 937 | struct buffer_head *bh; |
Jan Kara | de1b794 | 2011-06-13 15:38:22 -0400 | [diff] [blame] | 938 | int try_to_free = 0; |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 939 | |
| 940 | jh = commit_transaction->t_forget; |
| 941 | spin_unlock(&journal->j_list_lock); |
| 942 | bh = jh2bh(jh); |
Jan Kara | de1b794 | 2011-06-13 15:38:22 -0400 | [diff] [blame] | 943 | /* |
| 944 | * Get a reference so that bh cannot be freed before we are |
| 945 | * done with it. |
| 946 | */ |
| 947 | get_bh(bh); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 948 | jbd_lock_bh_state(bh); |
dingdinghua | 23e2af3 | 2010-02-24 12:11:20 -0500 | [diff] [blame] | 949 | J_ASSERT_JH(jh, jh->b_transaction == commit_transaction); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 950 | |
| 951 | /* |
| 952 | * If there is undo-protected committed data against |
| 953 | * this buffer, then we can remove it now. If it is a |
| 954 | * buffer needing such protection, the old frozen_data |
| 955 | * field now points to a committed version of the |
| 956 | * buffer, so rotate that field to the new committed |
| 957 | * data. |
| 958 | * |
| 959 | * Otherwise, we can just throw away the frozen data now. |
Joel Becker | e06c822 | 2008-09-11 15:35:47 -0700 | [diff] [blame] | 960 | * |
| 961 | * We also know that the frozen data has already fired |
| 962 | * its triggers if they exist, so we can clear that too. |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 963 | */ |
| 964 | if (jh->b_committed_data) { |
Mingming Cao | af1e76d | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 965 | jbd2_free(jh->b_committed_data, bh->b_size); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 966 | jh->b_committed_data = NULL; |
| 967 | if (jh->b_frozen_data) { |
| 968 | jh->b_committed_data = jh->b_frozen_data; |
| 969 | jh->b_frozen_data = NULL; |
Joel Becker | e06c822 | 2008-09-11 15:35:47 -0700 | [diff] [blame] | 970 | jh->b_frozen_triggers = NULL; |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 971 | } |
| 972 | } else if (jh->b_frozen_data) { |
Mingming Cao | af1e76d | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 973 | jbd2_free(jh->b_frozen_data, bh->b_size); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 974 | jh->b_frozen_data = NULL; |
Joel Becker | e06c822 | 2008-09-11 15:35:47 -0700 | [diff] [blame] | 975 | jh->b_frozen_triggers = NULL; |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 976 | } |
| 977 | |
| 978 | spin_lock(&journal->j_list_lock); |
| 979 | cp_transaction = jh->b_cp_transaction; |
| 980 | if (cp_transaction) { |
| 981 | JBUFFER_TRACE(jh, "remove from old cp transaction"); |
Johann Lombardi | 8e85fb3 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 982 | cp_transaction->t_chp_stats.cs_dropped++; |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 983 | __jbd2_journal_remove_checkpoint(jh); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 984 | } |
| 985 | |
| 986 | /* Only re-checkpoint the buffer_head if it is marked |
| 987 | * dirty. If the buffer was added to the BJ_Forget list |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 988 | * by jbd2_journal_forget, it may no longer be dirty and |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 989 | * there's no point in keeping a checkpoint record for |
| 990 | * it. */ |
| 991 | |
Jan Kara | b794e7a | 2012-09-26 23:11:13 -0400 | [diff] [blame] | 992 | /* |
| 993 | * A buffer which has been freed while still being journaled by |
| 994 | * a previous transaction. |
| 995 | */ |
| 996 | if (buffer_freed(bh)) { |
| 997 | /* |
| 998 | * If the running transaction is the one containing |
| 999 | * "add to orphan" operation (b_next_transaction != |
| 1000 | * NULL), we have to wait for that transaction to |
| 1001 | * commit before we can really get rid of the buffer. |
| 1002 | * So just clear b_modified to not confuse transaction |
| 1003 | * credit accounting and refile the buffer to |
| 1004 | * BJ_Forget of the running transaction. If the just |
| 1005 | * committed transaction contains "add to orphan" |
| 1006 | * operation, we can completely invalidate the buffer |
| 1007 | * now. We are rather through in that since the |
| 1008 | * buffer may be still accessible when blocksize < |
| 1009 | * pagesize and it is attached to the last partial |
| 1010 | * page. |
| 1011 | */ |
| 1012 | jh->b_modified = 0; |
| 1013 | if (!jh->b_next_transaction) { |
| 1014 | clear_buffer_freed(bh); |
| 1015 | clear_buffer_jbddirty(bh); |
| 1016 | clear_buffer_mapped(bh); |
| 1017 | clear_buffer_new(bh); |
| 1018 | clear_buffer_req(bh); |
| 1019 | bh->b_bdev = NULL; |
| 1020 | } |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 1021 | } |
| 1022 | |
| 1023 | if (buffer_jbddirty(bh)) { |
| 1024 | JBUFFER_TRACE(jh, "add to new checkpointing trans"); |
Mingming Cao | f7f4bcc | 2006-10-11 01:20:59 -0700 | [diff] [blame] | 1025 | __jbd2_journal_insert_checkpoint(jh, commit_transaction); |
Hidehiro Kawai | 7ad7445 | 2008-10-10 20:29:31 -0400 | [diff] [blame] | 1026 | if (is_journal_aborted(journal)) |
| 1027 | clear_buffer_jbddirty(bh); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 1028 | } else { |
| 1029 | J_ASSERT_BH(bh, !buffer_dirty(bh)); |
Jan Kara | de1b794 | 2011-06-13 15:38:22 -0400 | [diff] [blame] | 1030 | /* |
| 1031 | * The buffer on BJ_Forget list and not jbddirty means |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 1032 | * it has been freed by this transaction and hence it |
| 1033 | * could not have been reallocated until this |
| 1034 | * transaction has committed. *BUT* it could be |
| 1035 | * reallocated once we have written all the data to |
| 1036 | * disk and before we process the buffer on BJ_Forget |
Jan Kara | de1b794 | 2011-06-13 15:38:22 -0400 | [diff] [blame] | 1037 | * list. |
| 1038 | */ |
| 1039 | if (!jh->b_next_transaction) |
| 1040 | try_to_free = 1; |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 1041 | } |
Jan Kara | de1b794 | 2011-06-13 15:38:22 -0400 | [diff] [blame] | 1042 | JBUFFER_TRACE(jh, "refile or unfile buffer"); |
| 1043 | __jbd2_journal_refile_buffer(jh); |
| 1044 | jbd_unlock_bh_state(bh); |
| 1045 | if (try_to_free) |
| 1046 | release_buffer_page(bh); /* Drops bh reference */ |
| 1047 | else |
| 1048 | __brelse(bh); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 1049 | cond_resched_lock(&journal->j_list_lock); |
| 1050 | } |
| 1051 | spin_unlock(&journal->j_list_lock); |
| 1052 | /* |
Jan Kara | f5a7a6b | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1053 | * This is a bit sleazy. We use j_list_lock to protect transition |
| 1054 | * of a transaction into T_FINISHED state and calling |
| 1055 | * __jbd2_journal_drop_transaction(). Otherwise we could race with |
| 1056 | * other checkpointing code processing the transaction... |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 1057 | */ |
Theodore Ts'o | a931da6 | 2010-08-03 21:35:12 -0400 | [diff] [blame] | 1058 | write_lock(&journal->j_state_lock); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 1059 | spin_lock(&journal->j_list_lock); |
| 1060 | /* |
| 1061 | * Now recheck if some buffers did not get attached to the transaction |
| 1062 | * while the lock was dropped... |
| 1063 | */ |
| 1064 | if (commit_transaction->t_forget) { |
| 1065 | spin_unlock(&journal->j_list_lock); |
Theodore Ts'o | a931da6 | 2010-08-03 21:35:12 -0400 | [diff] [blame] | 1066 | write_unlock(&journal->j_state_lock); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 1067 | goto restart_loop; |
| 1068 | } |
| 1069 | |
| 1070 | /* Done with this transaction! */ |
| 1071 | |
Eryu Guan | f2a4452 | 2011-11-01 19:09:18 -0400 | [diff] [blame] | 1072 | jbd_debug(3, "JBD2: commit phase 7\n"); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 1073 | |
Jan Kara | bbd2be3 | 2011-05-24 11:59:18 -0400 | [diff] [blame] | 1074 | J_ASSERT(commit_transaction->t_state == T_COMMIT_JFLUSH); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 1075 | |
Johann Lombardi | 8e85fb3 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1076 | commit_transaction->t_start = jiffies; |
Theodore Ts'o | bf69932 | 2009-09-30 00:32:06 -0400 | [diff] [blame] | 1077 | stats.run.rs_logging = jbd2_time_diff(stats.run.rs_logging, |
| 1078 | commit_transaction->t_start); |
Johann Lombardi | 8e85fb3 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1079 | |
| 1080 | /* |
Theodore Ts'o | bf69932 | 2009-09-30 00:32:06 -0400 | [diff] [blame] | 1081 | * File the transaction statistics |
Johann Lombardi | 8e85fb3 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1082 | */ |
Johann Lombardi | 8e85fb3 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1083 | stats.ts_tid = commit_transaction->t_tid; |
Theodore Ts'o | 8dd4204 | 2010-08-03 21:38:29 -0400 | [diff] [blame] | 1084 | stats.run.rs_handle_count = |
| 1085 | atomic_read(&commit_transaction->t_handle_count); |
Theodore Ts'o | bf69932 | 2009-09-30 00:32:06 -0400 | [diff] [blame] | 1086 | trace_jbd2_run_stats(journal->j_fs_dev->bd_dev, |
| 1087 | commit_transaction->t_tid, &stats.run); |
Johann Lombardi | 8e85fb3 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1088 | |
| 1089 | /* |
| 1090 | * Calculate overall stats |
| 1091 | */ |
Theodore Ts'o | bf69932 | 2009-09-30 00:32:06 -0400 | [diff] [blame] | 1092 | spin_lock(&journal->j_history_lock); |
Johann Lombardi | 8e85fb3 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1093 | journal->j_stats.ts_tid++; |
Theodore Ts'o | 9fff24a | 2013-02-06 22:30:23 -0500 | [diff] [blame] | 1094 | if (commit_transaction->t_requested) |
| 1095 | journal->j_stats.ts_requested++; |
Theodore Ts'o | bf69932 | 2009-09-30 00:32:06 -0400 | [diff] [blame] | 1096 | journal->j_stats.run.rs_wait += stats.run.rs_wait; |
Theodore Ts'o | 9fff24a | 2013-02-06 22:30:23 -0500 | [diff] [blame] | 1097 | journal->j_stats.run.rs_request_delay += stats.run.rs_request_delay; |
Theodore Ts'o | bf69932 | 2009-09-30 00:32:06 -0400 | [diff] [blame] | 1098 | journal->j_stats.run.rs_running += stats.run.rs_running; |
| 1099 | journal->j_stats.run.rs_locked += stats.run.rs_locked; |
| 1100 | journal->j_stats.run.rs_flushing += stats.run.rs_flushing; |
| 1101 | journal->j_stats.run.rs_logging += stats.run.rs_logging; |
| 1102 | journal->j_stats.run.rs_handle_count += stats.run.rs_handle_count; |
| 1103 | journal->j_stats.run.rs_blocks += stats.run.rs_blocks; |
| 1104 | journal->j_stats.run.rs_blocks_logged += stats.run.rs_blocks_logged; |
Johann Lombardi | 8e85fb3 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1105 | spin_unlock(&journal->j_history_lock); |
| 1106 | |
Dmitry Monakhov | 794446c | 2013-04-03 22:06:52 -0400 | [diff] [blame] | 1107 | commit_transaction->t_state = T_COMMIT_CALLBACK; |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 1108 | J_ASSERT(commit_transaction == journal->j_committing_transaction); |
| 1109 | journal->j_commit_sequence = commit_transaction->t_tid; |
| 1110 | journal->j_committing_transaction = NULL; |
Josef Bacik | e07f718 | 2008-11-26 01:14:26 -0500 | [diff] [blame] | 1111 | commit_time = ktime_to_ns(ktime_sub(ktime_get(), start_time)); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 1112 | |
Josef Bacik | e07f718 | 2008-11-26 01:14:26 -0500 | [diff] [blame] | 1113 | /* |
| 1114 | * weight the commit time higher than the average time so we don't |
| 1115 | * react too strongly to vast changes in the commit time |
| 1116 | */ |
| 1117 | if (likely(journal->j_average_commit_time)) |
| 1118 | journal->j_average_commit_time = (commit_time + |
| 1119 | journal->j_average_commit_time*3) / 4; |
| 1120 | else |
| 1121 | journal->j_average_commit_time = commit_time; |
Dmitry Monakhov | 794446c | 2013-04-03 22:06:52 -0400 | [diff] [blame] | 1122 | |
Theodore Ts'o | a931da6 | 2010-08-03 21:35:12 -0400 | [diff] [blame] | 1123 | write_unlock(&journal->j_state_lock); |
Theodore Ts'o | 6c20ec8 | 2008-10-28 21:08:20 -0400 | [diff] [blame] | 1124 | |
Dmitry Monakhov | 794446c | 2013-04-03 22:06:52 -0400 | [diff] [blame] | 1125 | if (journal->j_checkpoint_transactions == NULL) { |
| 1126 | journal->j_checkpoint_transactions = commit_transaction; |
| 1127 | commit_transaction->t_cpnext = commit_transaction; |
| 1128 | commit_transaction->t_cpprev = commit_transaction; |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 1129 | } else { |
Dmitry Monakhov | 794446c | 2013-04-03 22:06:52 -0400 | [diff] [blame] | 1130 | commit_transaction->t_cpnext = |
| 1131 | journal->j_checkpoint_transactions; |
| 1132 | commit_transaction->t_cpprev = |
| 1133 | commit_transaction->t_cpnext->t_cpprev; |
| 1134 | commit_transaction->t_cpnext->t_cpprev = |
| 1135 | commit_transaction; |
| 1136 | commit_transaction->t_cpprev->t_cpnext = |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 1137 | commit_transaction; |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 1138 | } |
| 1139 | spin_unlock(&journal->j_list_lock); |
Dmitry Monakhov | 794446c | 2013-04-03 22:06:52 -0400 | [diff] [blame] | 1140 | /* Drop all spin_locks because commit_callback may be block. |
| 1141 | * __journal_remove_checkpoint() can not destroy transaction |
| 1142 | * under us because it is not marked as T_FINISHED yet */ |
Aneesh Kumar K.V | fb68407 | 2008-11-06 17:50:21 -0500 | [diff] [blame] | 1143 | if (journal->j_commit_callback) |
| 1144 | journal->j_commit_callback(journal, commit_transaction); |
| 1145 | |
Theodore Ts'o | 879c5e6 | 2009-06-17 11:47:48 -0400 | [diff] [blame] | 1146 | trace_jbd2_end_commit(journal, commit_transaction); |
Eryu Guan | f2a4452 | 2011-11-01 19:09:18 -0400 | [diff] [blame] | 1147 | jbd_debug(1, "JBD2: commit %d complete, head %d\n", |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 1148 | journal->j_commit_sequence, journal->j_tail_sequence); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 1149 | |
Dmitry Monakhov | 794446c | 2013-04-03 22:06:52 -0400 | [diff] [blame] | 1150 | write_lock(&journal->j_state_lock); |
| 1151 | spin_lock(&journal->j_list_lock); |
| 1152 | commit_transaction->t_state = T_FINISHED; |
| 1153 | /* Recheck checkpoint lists after j_list_lock was dropped */ |
| 1154 | if (commit_transaction->t_checkpoint_list == NULL && |
| 1155 | commit_transaction->t_checkpoint_io_list == NULL) { |
| 1156 | __jbd2_journal_drop_transaction(journal, commit_transaction); |
| 1157 | jbd2_journal_free_transaction(commit_transaction); |
| 1158 | } |
| 1159 | spin_unlock(&journal->j_list_lock); |
| 1160 | write_unlock(&journal->j_state_lock); |
Dave Kleikamp | 470decc | 2006-10-11 01:20:57 -0700 | [diff] [blame] | 1161 | wake_up(&journal->j_wait_done_commit); |
| 1162 | } |