186736342SJosef Bacik // SPDX-License-Identifier: GPL-2.0 286736342SJosef Bacik 39b569ea0SJosef Bacik #include "messages.h" 486736342SJosef Bacik #include "ctree.h" 586736342SJosef Bacik #include "delalloc-space.h" 686736342SJosef Bacik #include "block-rsv.h" 786736342SJosef Bacik #include "btrfs_inode.h" 886736342SJosef Bacik #include "space-info.h" 986736342SJosef Bacik #include "transaction.h" 1086736342SJosef Bacik #include "qgroup.h" 1107730d87SJosef Bacik #include "block-group.h" 12ec8eb376SJosef Bacik #include "fs.h" 1386736342SJosef Bacik 146f4ad559SJosef Bacik /* 156f4ad559SJosef Bacik * HOW DOES THIS WORK 166f4ad559SJosef Bacik * 176f4ad559SJosef Bacik * There are two stages to data reservations, one for data and one for metadata 186f4ad559SJosef Bacik * to handle the new extents and checksums generated by writing data. 196f4ad559SJosef Bacik * 206f4ad559SJosef Bacik * 216f4ad559SJosef Bacik * DATA RESERVATION 226f4ad559SJosef Bacik * The general flow of the data reservation is as follows 236f4ad559SJosef Bacik * 246f4ad559SJosef Bacik * -> Reserve 256f4ad559SJosef Bacik * We call into btrfs_reserve_data_bytes() for the user request bytes that 266f4ad559SJosef Bacik * they wish to write. We make this reservation and add it to 276f4ad559SJosef Bacik * space_info->bytes_may_use. We set EXTENT_DELALLOC on the inode io_tree 286f4ad559SJosef Bacik * for the range and carry on if this is buffered, or follow up trying to 296f4ad559SJosef Bacik * make a real allocation if we are pre-allocating or doing O_DIRECT. 306f4ad559SJosef Bacik * 316f4ad559SJosef Bacik * -> Use 326f4ad559SJosef Bacik * At writepages()/prealloc/O_DIRECT time we will call into 336f4ad559SJosef Bacik * btrfs_reserve_extent() for some part or all of this range of bytes. We 346f4ad559SJosef Bacik * will make the allocation and subtract space_info->bytes_may_use by the 356f4ad559SJosef Bacik * original requested length and increase the space_info->bytes_reserved by 366f4ad559SJosef Bacik * the allocated length. This distinction is important because compression 376f4ad559SJosef Bacik * may allocate a smaller on disk extent than we previously reserved. 386f4ad559SJosef Bacik * 396f4ad559SJosef Bacik * -> Allocation 406f4ad559SJosef Bacik * finish_ordered_io() will insert the new file extent item for this range, 416f4ad559SJosef Bacik * and then add a delayed ref update for the extent tree. Once that delayed 426f4ad559SJosef Bacik * ref is written the extent size is subtracted from 436f4ad559SJosef Bacik * space_info->bytes_reserved and added to space_info->bytes_used. 446f4ad559SJosef Bacik * 456f4ad559SJosef Bacik * Error handling 466f4ad559SJosef Bacik * 476f4ad559SJosef Bacik * -> By the reservation maker 486f4ad559SJosef Bacik * This is the simplest case, we haven't completed our operation and we know 496f4ad559SJosef Bacik * how much we reserved, we can simply call 506f4ad559SJosef Bacik * btrfs_free_reserved_data_space*() and it will be removed from 516f4ad559SJosef Bacik * space_info->bytes_may_use. 526f4ad559SJosef Bacik * 536f4ad559SJosef Bacik * -> After the reservation has been made, but before cow_file_range() 546f4ad559SJosef Bacik * This is specifically for the delalloc case. You must clear 556f4ad559SJosef Bacik * EXTENT_DELALLOC with the EXTENT_CLEAR_DATA_RESV bit, and the range will 566f4ad559SJosef Bacik * be subtracted from space_info->bytes_may_use. 576f4ad559SJosef Bacik * 586f4ad559SJosef Bacik * METADATA RESERVATION 596f4ad559SJosef Bacik * The general metadata reservation lifetimes are discussed elsewhere, this 606f4ad559SJosef Bacik * will just focus on how it is used for delalloc space. 616f4ad559SJosef Bacik * 626f4ad559SJosef Bacik * We keep track of two things on a per inode bases 636f4ad559SJosef Bacik * 646f4ad559SJosef Bacik * ->outstanding_extents 656f4ad559SJosef Bacik * This is the number of file extent items we'll need to handle all of the 666f4ad559SJosef Bacik * outstanding DELALLOC space we have in this inode. We limit the maximum 676f4ad559SJosef Bacik * size of an extent, so a large contiguous dirty area may require more than 686f4ad559SJosef Bacik * one outstanding_extent, which is why count_max_extents() is used to 696f4ad559SJosef Bacik * determine how many outstanding_extents get added. 706f4ad559SJosef Bacik * 716f4ad559SJosef Bacik * ->csum_bytes 726f4ad559SJosef Bacik * This is essentially how many dirty bytes we have for this inode, so we 736f4ad559SJosef Bacik * can calculate the number of checksum items we would have to add in order 746f4ad559SJosef Bacik * to checksum our outstanding data. 756f4ad559SJosef Bacik * 766f4ad559SJosef Bacik * We keep a per-inode block_rsv in order to make it easier to keep track of 776f4ad559SJosef Bacik * our reservation. We use btrfs_calculate_inode_block_rsv_size() to 786f4ad559SJosef Bacik * calculate the current theoretical maximum reservation we would need for the 796f4ad559SJosef Bacik * metadata for this inode. We call this and then adjust our reservation as 806f4ad559SJosef Bacik * necessary, either by attempting to reserve more space, or freeing up excess 816f4ad559SJosef Bacik * space. 826f4ad559SJosef Bacik * 836f4ad559SJosef Bacik * OUTSTANDING_EXTENTS HANDLING 846f4ad559SJosef Bacik * 856f4ad559SJosef Bacik * ->outstanding_extents is used for keeping track of how many extents we will 866f4ad559SJosef Bacik * need to use for this inode, and it will fluctuate depending on where you are 876f4ad559SJosef Bacik * in the life cycle of the dirty data. Consider the following normal case for 886f4ad559SJosef Bacik * a completely clean inode, with a num_bytes < our maximum allowed extent size 896f4ad559SJosef Bacik * 906f4ad559SJosef Bacik * -> reserve 916f4ad559SJosef Bacik * ->outstanding_extents += 1 (current value is 1) 926f4ad559SJosef Bacik * 936f4ad559SJosef Bacik * -> set_delalloc 941a9fd417SDavid Sterba * ->outstanding_extents += 1 (current value is 2) 956f4ad559SJosef Bacik * 966f4ad559SJosef Bacik * -> btrfs_delalloc_release_extents() 976f4ad559SJosef Bacik * ->outstanding_extents -= 1 (current value is 1) 986f4ad559SJosef Bacik * 996f4ad559SJosef Bacik * We must call this once we are done, as we hold our reservation for the 1006f4ad559SJosef Bacik * duration of our operation, and then assume set_delalloc will update the 1016f4ad559SJosef Bacik * counter appropriately. 1026f4ad559SJosef Bacik * 1036f4ad559SJosef Bacik * -> add ordered extent 1046f4ad559SJosef Bacik * ->outstanding_extents += 1 (current value is 2) 1056f4ad559SJosef Bacik * 1066f4ad559SJosef Bacik * -> btrfs_clear_delalloc_extent 1076f4ad559SJosef Bacik * ->outstanding_extents -= 1 (current value is 1) 1086f4ad559SJosef Bacik * 1096f4ad559SJosef Bacik * -> finish_ordered_io/btrfs_remove_ordered_extent 1106f4ad559SJosef Bacik * ->outstanding_extents -= 1 (current value is 0) 1116f4ad559SJosef Bacik * 1126f4ad559SJosef Bacik * Each stage is responsible for their own accounting of the extent, thus 1136f4ad559SJosef Bacik * making error handling and cleanup easier. 1146f4ad559SJosef Bacik */ 1156f4ad559SJosef Bacik 11686736342SJosef Bacik int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes) 11786736342SJosef Bacik { 11886736342SJosef Bacik struct btrfs_root *root = inode->root; 11986736342SJosef Bacik struct btrfs_fs_info *fs_info = root->fs_info; 1208698fc4eSJosef Bacik enum btrfs_reserve_flush_enum flush = BTRFS_RESERVE_FLUSH_DATA; 12186736342SJosef Bacik 12286736342SJosef Bacik /* Make sure bytes are sectorsize aligned */ 12386736342SJosef Bacik bytes = ALIGN(bytes, fs_info->sectorsize); 12486736342SJosef Bacik 1258698fc4eSJosef Bacik if (btrfs_is_free_space_inode(inode)) 1268698fc4eSJosef Bacik flush = BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE; 12786736342SJosef Bacik 1288698fc4eSJosef Bacik return btrfs_reserve_data_bytes(fs_info, bytes, flush); 12986736342SJosef Bacik } 13086736342SJosef Bacik 13136ea6f3eSNikolay Borisov int btrfs_check_data_free_space(struct btrfs_inode *inode, 1321daedb1dSJosef Bacik struct extent_changeset **reserved, u64 start, 1331daedb1dSJosef Bacik u64 len, bool noflush) 13486736342SJosef Bacik { 13536ea6f3eSNikolay Borisov struct btrfs_fs_info *fs_info = inode->root->fs_info; 1361daedb1dSJosef Bacik enum btrfs_reserve_flush_enum flush = BTRFS_RESERVE_FLUSH_DATA; 13786736342SJosef Bacik int ret; 13886736342SJosef Bacik 13986736342SJosef Bacik /* align the range */ 14086736342SJosef Bacik len = round_up(start + len, fs_info->sectorsize) - 14186736342SJosef Bacik round_down(start, fs_info->sectorsize); 14286736342SJosef Bacik start = round_down(start, fs_info->sectorsize); 14386736342SJosef Bacik 1441daedb1dSJosef Bacik if (noflush) 1451daedb1dSJosef Bacik flush = BTRFS_RESERVE_NO_FLUSH; 1461daedb1dSJosef Bacik else if (btrfs_is_free_space_inode(inode)) 1471daedb1dSJosef Bacik flush = BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE; 1481daedb1dSJosef Bacik 1491daedb1dSJosef Bacik ret = btrfs_reserve_data_bytes(fs_info, len, flush); 15086736342SJosef Bacik if (ret < 0) 15186736342SJosef Bacik return ret; 15286736342SJosef Bacik 15386736342SJosef Bacik /* Use new btrfs_qgroup_reserve_data to reserve precious data space. */ 15436ea6f3eSNikolay Borisov ret = btrfs_qgroup_reserve_data(inode, reserved, start, len); 155da5e817dSJohannes Thumshirn if (ret < 0) { 1569db5d510SNikolay Borisov btrfs_free_reserved_data_space_noquota(fs_info, len); 157da5e817dSJohannes Thumshirn extent_changeset_free(*reserved); 158da5e817dSJohannes Thumshirn *reserved = NULL; 159da5e817dSJohannes Thumshirn } else { 16086736342SJosef Bacik ret = 0; 161da5e817dSJohannes Thumshirn } 16286736342SJosef Bacik return ret; 16386736342SJosef Bacik } 16486736342SJosef Bacik 16586736342SJosef Bacik /* 16686736342SJosef Bacik * Called if we need to clear a data reservation for this inode 16786736342SJosef Bacik * Normally in a error case. 16886736342SJosef Bacik * 16986736342SJosef Bacik * This one will *NOT* use accurate qgroup reserved space API, just for case 17086736342SJosef Bacik * which we can't sleep and is sure it won't affect qgroup reserved space. 17186736342SJosef Bacik * Like clear_bit_hook(). 17286736342SJosef Bacik */ 1739db5d510SNikolay Borisov void btrfs_free_reserved_data_space_noquota(struct btrfs_fs_info *fs_info, 17486736342SJosef Bacik u64 len) 17586736342SJosef Bacik { 17686736342SJosef Bacik struct btrfs_space_info *data_sinfo; 17786736342SJosef Bacik 17846d4dac8SFilipe Manana ASSERT(IS_ALIGNED(len, fs_info->sectorsize)); 17986736342SJosef Bacik 18086736342SJosef Bacik data_sinfo = fs_info->data_sinfo; 18139753e4aSJosef Bacik btrfs_space_info_free_bytes_may_use(fs_info, data_sinfo, len); 18286736342SJosef Bacik } 18386736342SJosef Bacik 18486736342SJosef Bacik /* 18586736342SJosef Bacik * Called if we need to clear a data reservation for this inode 18686736342SJosef Bacik * Normally in a error case. 18786736342SJosef Bacik * 18886736342SJosef Bacik * This one will handle the per-inode data rsv map for accurate reserved 18986736342SJosef Bacik * space framework. 19086736342SJosef Bacik */ 19125ce28caSNikolay Borisov void btrfs_free_reserved_data_space(struct btrfs_inode *inode, 19286736342SJosef Bacik struct extent_changeset *reserved, u64 start, u64 len) 19386736342SJosef Bacik { 19425ce28caSNikolay Borisov struct btrfs_fs_info *fs_info = inode->root->fs_info; 19586736342SJosef Bacik 19686736342SJosef Bacik /* Make sure the range is aligned to sectorsize */ 19725ce28caSNikolay Borisov len = round_up(start + len, fs_info->sectorsize) - 19825ce28caSNikolay Borisov round_down(start, fs_info->sectorsize); 19925ce28caSNikolay Borisov start = round_down(start, fs_info->sectorsize); 20086736342SJosef Bacik 20125ce28caSNikolay Borisov btrfs_free_reserved_data_space_noquota(fs_info, len); 202*18234915SBoris Burkov btrfs_qgroup_free_data(inode, reserved, start, len, NULL); 20386736342SJosef Bacik } 20486736342SJosef Bacik 20543dd529aSDavid Sterba /* 20643dd529aSDavid Sterba * Release any excessive reservations for an inode. 207b762d1d0SNikolay Borisov * 208b762d1d0SNikolay Borisov * @inode: the inode we need to release from 209b762d1d0SNikolay Borisov * @qgroup_free: free or convert qgroup meta. Unlike normal operation, qgroup 210b762d1d0SNikolay Borisov * meta reservation needs to know if we are freeing qgroup 211b762d1d0SNikolay Borisov * reservation or just converting it into per-trans. Normally 212b762d1d0SNikolay Borisov * @qgroup_free is true for error handling, and false for normal 213b762d1d0SNikolay Borisov * release. 21486736342SJosef Bacik * 21586736342SJosef Bacik * This is the same as btrfs_block_rsv_release, except that it handles the 21686736342SJosef Bacik * tracepoint for the reservation. 21786736342SJosef Bacik */ 21886736342SJosef Bacik static void btrfs_inode_rsv_release(struct btrfs_inode *inode, bool qgroup_free) 21986736342SJosef Bacik { 22086736342SJosef Bacik struct btrfs_fs_info *fs_info = inode->root->fs_info; 22186736342SJosef Bacik struct btrfs_block_rsv *block_rsv = &inode->block_rsv; 22286736342SJosef Bacik u64 released = 0; 22386736342SJosef Bacik u64 qgroup_to_release = 0; 22486736342SJosef Bacik 22586736342SJosef Bacik /* 22686736342SJosef Bacik * Since we statically set the block_rsv->size we just want to say we 22786736342SJosef Bacik * are releasing 0 bytes, and then we'll just get the reservation over 22886736342SJosef Bacik * the size free'd. 22986736342SJosef Bacik */ 23063f018beSNikolay Borisov released = btrfs_block_rsv_release(fs_info, block_rsv, 0, 23186736342SJosef Bacik &qgroup_to_release); 23286736342SJosef Bacik if (released > 0) 23386736342SJosef Bacik trace_btrfs_space_reservation(fs_info, "delalloc", 23486736342SJosef Bacik btrfs_ino(inode), released, 0); 23586736342SJosef Bacik if (qgroup_free) 23686736342SJosef Bacik btrfs_qgroup_free_meta_prealloc(inode->root, qgroup_to_release); 23786736342SJosef Bacik else 23886736342SJosef Bacik btrfs_qgroup_convert_reserved_meta(inode->root, 23986736342SJosef Bacik qgroup_to_release); 24086736342SJosef Bacik } 24186736342SJosef Bacik 24286736342SJosef Bacik static void btrfs_calculate_inode_block_rsv_size(struct btrfs_fs_info *fs_info, 24386736342SJosef Bacik struct btrfs_inode *inode) 24486736342SJosef Bacik { 24586736342SJosef Bacik struct btrfs_block_rsv *block_rsv = &inode->block_rsv; 24686736342SJosef Bacik u64 reserve_size = 0; 24786736342SJosef Bacik u64 qgroup_rsv_size = 0; 24886736342SJosef Bacik u64 csum_leaves; 24986736342SJosef Bacik unsigned outstanding_extents; 25086736342SJosef Bacik 25186736342SJosef Bacik lockdep_assert_held(&inode->lock); 25286736342SJosef Bacik outstanding_extents = inode->outstanding_extents; 253bcacf5f3SJosef Bacik 254bcacf5f3SJosef Bacik /* 255bcacf5f3SJosef Bacik * Insert size for the number of outstanding extents, 1 normal size for 256bcacf5f3SJosef Bacik * updating the inode. 257bcacf5f3SJosef Bacik */ 258bcacf5f3SJosef Bacik if (outstanding_extents) { 2592bd36e7bSJosef Bacik reserve_size = btrfs_calc_insert_metadata_size(fs_info, 260bcacf5f3SJosef Bacik outstanding_extents); 261bcacf5f3SJosef Bacik reserve_size += btrfs_calc_metadata_size(fs_info, 1); 262bcacf5f3SJosef Bacik } 26386736342SJosef Bacik csum_leaves = btrfs_csum_bytes_to_leaves(fs_info, 26486736342SJosef Bacik inode->csum_bytes); 2652bd36e7bSJosef Bacik reserve_size += btrfs_calc_insert_metadata_size(fs_info, 26686736342SJosef Bacik csum_leaves); 26786736342SJosef Bacik /* 26886736342SJosef Bacik * For qgroup rsv, the calculation is very simple: 26986736342SJosef Bacik * account one nodesize for each outstanding extent 27086736342SJosef Bacik * 27186736342SJosef Bacik * This is overestimating in most cases. 27286736342SJosef Bacik */ 27386736342SJosef Bacik qgroup_rsv_size = (u64)outstanding_extents * fs_info->nodesize; 27486736342SJosef Bacik 27586736342SJosef Bacik spin_lock(&block_rsv->lock); 27686736342SJosef Bacik block_rsv->size = reserve_size; 27786736342SJosef Bacik block_rsv->qgroup_rsv_size = qgroup_rsv_size; 27886736342SJosef Bacik spin_unlock(&block_rsv->lock); 27986736342SJosef Bacik } 28086736342SJosef Bacik 28186736342SJosef Bacik static void calc_inode_reservations(struct btrfs_fs_info *fs_info, 28228c9b1e7SOmar Sandoval u64 num_bytes, u64 disk_num_bytes, 28328c9b1e7SOmar Sandoval u64 *meta_reserve, u64 *qgroup_reserve) 28486736342SJosef Bacik { 2857d7672bcSNaohiro Aota u64 nr_extents = count_max_extents(fs_info, num_bytes); 28628c9b1e7SOmar Sandoval u64 csum_leaves = btrfs_csum_bytes_to_leaves(fs_info, disk_num_bytes); 287bcacf5f3SJosef Bacik u64 inode_update = btrfs_calc_metadata_size(fs_info, 1); 28886736342SJosef Bacik 2892bd36e7bSJosef Bacik *meta_reserve = btrfs_calc_insert_metadata_size(fs_info, 290bcacf5f3SJosef Bacik nr_extents + csum_leaves); 291bcacf5f3SJosef Bacik 292bcacf5f3SJosef Bacik /* 293bcacf5f3SJosef Bacik * finish_ordered_io has to update the inode, so add the space required 294bcacf5f3SJosef Bacik * for an inode update. 295bcacf5f3SJosef Bacik */ 296bcacf5f3SJosef Bacik *meta_reserve += inode_update; 29786736342SJosef Bacik *qgroup_reserve = nr_extents * fs_info->nodesize; 29886736342SJosef Bacik } 29986736342SJosef Bacik 30028c9b1e7SOmar Sandoval int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes, 301d4135134SFilipe Manana u64 disk_num_bytes, bool noflush) 30286736342SJosef Bacik { 30386736342SJosef Bacik struct btrfs_root *root = inode->root; 30486736342SJosef Bacik struct btrfs_fs_info *fs_info = root->fs_info; 30586736342SJosef Bacik struct btrfs_block_rsv *block_rsv = &inode->block_rsv; 30686736342SJosef Bacik u64 meta_reserve, qgroup_reserve; 30786736342SJosef Bacik unsigned nr_extents; 30886736342SJosef Bacik enum btrfs_reserve_flush_enum flush = BTRFS_RESERVE_FLUSH_ALL; 30986736342SJosef Bacik int ret = 0; 31086736342SJosef Bacik 31186736342SJosef Bacik /* 31286736342SJosef Bacik * If we are a free space inode we need to not flush since we will be in 31386736342SJosef Bacik * the middle of a transaction commit. We also don't need the delalloc 31486736342SJosef Bacik * mutex since we won't race with anybody. We need this mostly to make 31586736342SJosef Bacik * lockdep shut its filthy mouth. 31686736342SJosef Bacik * 31786736342SJosef Bacik * If we have a transaction open (can happen if we call truncate_block 31886736342SJosef Bacik * from truncate), then we need FLUSH_LIMIT so we don't deadlock. 31986736342SJosef Bacik */ 320d4135134SFilipe Manana if (noflush || btrfs_is_free_space_inode(inode)) { 32186736342SJosef Bacik flush = BTRFS_RESERVE_NO_FLUSH; 32286736342SJosef Bacik } else { 32386736342SJosef Bacik if (current->journal_info) 32486736342SJosef Bacik flush = BTRFS_RESERVE_FLUSH_LIMIT; 32586736342SJosef Bacik } 32686736342SJosef Bacik 32786736342SJosef Bacik num_bytes = ALIGN(num_bytes, fs_info->sectorsize); 32828c9b1e7SOmar Sandoval disk_num_bytes = ALIGN(disk_num_bytes, fs_info->sectorsize); 32986736342SJosef Bacik 33086736342SJosef Bacik /* 33186736342SJosef Bacik * We always want to do it this way, every other way is wrong and ends 33286736342SJosef Bacik * in tears. Pre-reserving the amount we are going to add will always 33386736342SJosef Bacik * be the right way, because otherwise if we have enough parallelism we 33486736342SJosef Bacik * could end up with thousands of inodes all holding little bits of 33586736342SJosef Bacik * reservations they were able to make previously and the only way to 33686736342SJosef Bacik * reclaim that space is to ENOSPC out the operations and clear 33786736342SJosef Bacik * everything out and try again, which is bad. This way we just 33886736342SJosef Bacik * over-reserve slightly, and clean up the mess when we are done. 33986736342SJosef Bacik */ 34028c9b1e7SOmar Sandoval calc_inode_reservations(fs_info, num_bytes, disk_num_bytes, 34128c9b1e7SOmar Sandoval &meta_reserve, &qgroup_reserve); 342d4135134SFilipe Manana ret = btrfs_qgroup_reserve_meta_prealloc(root, qgroup_reserve, true, 343d4135134SFilipe Manana noflush); 34486736342SJosef Bacik if (ret) 34516ad3be1SFilipe Manana return ret; 3469270501cSJosef Bacik ret = btrfs_reserve_metadata_bytes(fs_info, block_rsv, meta_reserve, flush); 34716ad3be1SFilipe Manana if (ret) { 34816ad3be1SFilipe Manana btrfs_qgroup_free_meta_prealloc(root, qgroup_reserve); 34916ad3be1SFilipe Manana return ret; 35016ad3be1SFilipe Manana } 35186736342SJosef Bacik 35286736342SJosef Bacik /* 35386736342SJosef Bacik * Now we need to update our outstanding extents and csum bytes _first_ 35486736342SJosef Bacik * and then add the reservation to the block_rsv. This keeps us from 35586736342SJosef Bacik * racing with an ordered completion or some such that would think it 35686736342SJosef Bacik * needs to free the reservation we just made. 35786736342SJosef Bacik */ 3587d7672bcSNaohiro Aota nr_extents = count_max_extents(fs_info, num_bytes); 3599aa06c76SFilipe Manana spin_lock(&inode->lock); 36086736342SJosef Bacik btrfs_mod_outstanding_extents(inode, nr_extents); 36128c9b1e7SOmar Sandoval inode->csum_bytes += disk_num_bytes; 36286736342SJosef Bacik btrfs_calculate_inode_block_rsv_size(fs_info, inode); 36386736342SJosef Bacik spin_unlock(&inode->lock); 36486736342SJosef Bacik 36586736342SJosef Bacik /* Now we can safely add our space to our block rsv */ 36686736342SJosef Bacik btrfs_block_rsv_add_bytes(block_rsv, meta_reserve, false); 36786736342SJosef Bacik trace_btrfs_space_reservation(root->fs_info, "delalloc", 36886736342SJosef Bacik btrfs_ino(inode), meta_reserve, 1); 36986736342SJosef Bacik 37086736342SJosef Bacik spin_lock(&block_rsv->lock); 37186736342SJosef Bacik block_rsv->qgroup_rsv_reserved += qgroup_reserve; 37286736342SJosef Bacik spin_unlock(&block_rsv->lock); 37386736342SJosef Bacik 37486736342SJosef Bacik return 0; 37586736342SJosef Bacik } 37686736342SJosef Bacik 37743dd529aSDavid Sterba /* 37843dd529aSDavid Sterba * Release a metadata reservation for an inode. 379b762d1d0SNikolay Borisov * 38086736342SJosef Bacik * @inode: the inode to release the reservation for. 38186736342SJosef Bacik * @num_bytes: the number of bytes we are releasing. 38286736342SJosef Bacik * @qgroup_free: free qgroup reservation or convert it to per-trans reservation 38386736342SJosef Bacik * 38486736342SJosef Bacik * This will release the metadata reservation for an inode. This can be called 38586736342SJosef Bacik * once we complete IO for a given set of bytes to release their metadata 38686736342SJosef Bacik * reservations, or on error for the same reason. 38786736342SJosef Bacik */ 38886736342SJosef Bacik void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes, 38986736342SJosef Bacik bool qgroup_free) 39086736342SJosef Bacik { 39186736342SJosef Bacik struct btrfs_fs_info *fs_info = inode->root->fs_info; 39286736342SJosef Bacik 39386736342SJosef Bacik num_bytes = ALIGN(num_bytes, fs_info->sectorsize); 39486736342SJosef Bacik spin_lock(&inode->lock); 39586736342SJosef Bacik inode->csum_bytes -= num_bytes; 39686736342SJosef Bacik btrfs_calculate_inode_block_rsv_size(fs_info, inode); 39786736342SJosef Bacik spin_unlock(&inode->lock); 39886736342SJosef Bacik 39986736342SJosef Bacik if (btrfs_is_testing(fs_info)) 40086736342SJosef Bacik return; 40186736342SJosef Bacik 40286736342SJosef Bacik btrfs_inode_rsv_release(inode, qgroup_free); 40386736342SJosef Bacik } 40486736342SJosef Bacik 40543dd529aSDavid Sterba /* 40643dd529aSDavid Sterba * Release our outstanding_extents for an inode. 40743dd529aSDavid Sterba * 40886736342SJosef Bacik * @inode: the inode to balance the reservation for. 40986736342SJosef Bacik * @num_bytes: the number of bytes we originally reserved with 41086736342SJosef Bacik * 41186736342SJosef Bacik * When we reserve space we increase outstanding_extents for the extents we may 41286736342SJosef Bacik * add. Once we've set the range as delalloc or created our ordered extents we 41386736342SJosef Bacik * have outstanding_extents to track the real usage, so we use this to free our 41486736342SJosef Bacik * temporarily tracked outstanding_extents. This _must_ be used in conjunction 41586736342SJosef Bacik * with btrfs_delalloc_reserve_metadata. 41686736342SJosef Bacik */ 4178702ba93SQu Wenruo void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes) 41886736342SJosef Bacik { 41986736342SJosef Bacik struct btrfs_fs_info *fs_info = inode->root->fs_info; 42086736342SJosef Bacik unsigned num_extents; 42186736342SJosef Bacik 42286736342SJosef Bacik spin_lock(&inode->lock); 4237d7672bcSNaohiro Aota num_extents = count_max_extents(fs_info, num_bytes); 42486736342SJosef Bacik btrfs_mod_outstanding_extents(inode, -num_extents); 42586736342SJosef Bacik btrfs_calculate_inode_block_rsv_size(fs_info, inode); 42686736342SJosef Bacik spin_unlock(&inode->lock); 42786736342SJosef Bacik 42886736342SJosef Bacik if (btrfs_is_testing(fs_info)) 42986736342SJosef Bacik return; 43086736342SJosef Bacik 4318702ba93SQu Wenruo btrfs_inode_rsv_release(inode, true); 43286736342SJosef Bacik } 43386736342SJosef Bacik 43443dd529aSDavid Sterba /* 43543dd529aSDavid Sterba * Reserve data and metadata space for delalloc 43643dd529aSDavid Sterba * 43786736342SJosef Bacik * @inode: inode we're writing to 43886736342SJosef Bacik * @start: start range we are writing to 43986736342SJosef Bacik * @len: how long the range we are writing to 44086736342SJosef Bacik * @reserved: mandatory parameter, record actually reserved qgroup ranges of 44186736342SJosef Bacik * current reservation. 44286736342SJosef Bacik * 44386736342SJosef Bacik * This will do the following things 44486736342SJosef Bacik * 44543dd529aSDavid Sterba * - reserve space in data space info for num bytes and reserve precious 44643dd529aSDavid Sterba * corresponding qgroup space 44786736342SJosef Bacik * (Done in check_data_free_space) 44886736342SJosef Bacik * 44986736342SJosef Bacik * - reserve space for metadata space, based on the number of outstanding 45043dd529aSDavid Sterba * extents and how much csums will be needed also reserve metadata space in a 45143dd529aSDavid Sterba * per root over-reserve method. 45286736342SJosef Bacik * - add to the inodes->delalloc_bytes 45386736342SJosef Bacik * - add it to the fs_info's delalloc inodes list. 45486736342SJosef Bacik * (Above 3 all done in delalloc_reserve_metadata) 45586736342SJosef Bacik * 45686736342SJosef Bacik * Return 0 for success 45743dd529aSDavid Sterba * Return <0 for error(-ENOSPC or -EDQUOT) 45886736342SJosef Bacik */ 459e5b7231eSNikolay Borisov int btrfs_delalloc_reserve_space(struct btrfs_inode *inode, 46086736342SJosef Bacik struct extent_changeset **reserved, u64 start, u64 len) 46186736342SJosef Bacik { 46286736342SJosef Bacik int ret; 46386736342SJosef Bacik 4641daedb1dSJosef Bacik ret = btrfs_check_data_free_space(inode, reserved, start, len, false); 46586736342SJosef Bacik if (ret < 0) 46686736342SJosef Bacik return ret; 467d4135134SFilipe Manana ret = btrfs_delalloc_reserve_metadata(inode, len, len, false); 468da5e817dSJohannes Thumshirn if (ret < 0) { 469e5b7231eSNikolay Borisov btrfs_free_reserved_data_space(inode, *reserved, start, len); 470da5e817dSJohannes Thumshirn extent_changeset_free(*reserved); 471da5e817dSJohannes Thumshirn *reserved = NULL; 472da5e817dSJohannes Thumshirn } 47386736342SJosef Bacik return ret; 47486736342SJosef Bacik } 47586736342SJosef Bacik 47643dd529aSDavid Sterba /* 477b762d1d0SNikolay Borisov * Release data and metadata space for delalloc 478b762d1d0SNikolay Borisov * 47986736342SJosef Bacik * @inode: inode we're releasing space for 480b762d1d0SNikolay Borisov * @reserved: list of changed/reserved ranges 48186736342SJosef Bacik * @start: start position of the space already reserved 482b762d1d0SNikolay Borisov * @len: length of the space already reserved 483b762d1d0SNikolay Borisov * @qgroup_free: should qgroup reserved-space also be freed 48486736342SJosef Bacik * 48543dd529aSDavid Sterba * Release the metadata space that was not used and will decrement 48643dd529aSDavid Sterba * ->delalloc_bytes and remove it from the fs_info->delalloc_inodes list if 48743dd529aSDavid Sterba * there are no delalloc bytes left. Also it will handle the qgroup reserved 48843dd529aSDavid Sterba * space. 48986736342SJosef Bacik */ 49086d52921SNikolay Borisov void btrfs_delalloc_release_space(struct btrfs_inode *inode, 49186736342SJosef Bacik struct extent_changeset *reserved, 49286736342SJosef Bacik u64 start, u64 len, bool qgroup_free) 49386736342SJosef Bacik { 49486d52921SNikolay Borisov btrfs_delalloc_release_metadata(inode, len, qgroup_free); 49586d52921SNikolay Borisov btrfs_free_reserved_data_space(inode, reserved, start, len); 49686736342SJosef Bacik } 497