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-rw-r--r--fs/btrfs/ctree.h9
-rw-r--r--fs/btrfs/extent-tree.c65
-rw-r--r--fs/btrfs/extent_io.c12
-rw-r--r--fs/btrfs/extent_map.h1
-rw-r--r--fs/btrfs/file.c245
-rw-r--r--fs/btrfs/inode.c323
-rw-r--r--fs/btrfs/ioctl.c3
-rw-r--r--fs/btrfs/ordered-data.c5
-rw-r--r--fs/btrfs/ordered-data.h4
-rw-r--r--fs/btrfs/tree-log.c13
10 files changed, 563 insertions, 117 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 8bf6a085a73..d5ba3d1aaf9 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -462,8 +462,9 @@ struct btrfs_root_item {
462 u8 level; 462 u8 level;
463} __attribute__ ((__packed__)); 463} __attribute__ ((__packed__));
464 464
465#define BTRFS_FILE_EXTENT_REG 0 465#define BTRFS_FILE_EXTENT_INLINE 0
466#define BTRFS_FILE_EXTENT_INLINE 1 466#define BTRFS_FILE_EXTENT_REG 1
467#define BTRFS_FILE_EXTENT_PREALLOC 2
467 468
468struct btrfs_file_extent_item { 469struct btrfs_file_extent_item {
469 /* 470 /*
@@ -868,6 +869,7 @@ struct btrfs_root {
868#define BTRFS_INODE_NODATACOW (1 << 1) 869#define BTRFS_INODE_NODATACOW (1 << 1)
869#define BTRFS_INODE_READONLY (1 << 2) 870#define BTRFS_INODE_READONLY (1 << 2)
870#define BTRFS_INODE_NOCOMPRESS (1 << 3) 871#define BTRFS_INODE_NOCOMPRESS (1 << 3)
872#define BTRFS_INODE_PREALLOC (1 << 4)
871#define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \ 873#define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
872 ~BTRFS_INODE_##flag) 874 ~BTRFS_INODE_##flag)
873#define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \ 875#define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
@@ -1924,6 +1926,9 @@ extern struct file_operations btrfs_file_operations;
1924int btrfs_drop_extents(struct btrfs_trans_handle *trans, 1926int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1925 struct btrfs_root *root, struct inode *inode, 1927 struct btrfs_root *root, struct inode *inode,
1926 u64 start, u64 end, u64 inline_limit, u64 *hint_block); 1928 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1929int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
1930 struct btrfs_root *root,
1931 struct inode *inode, u64 start, u64 end);
1927int btrfs_release_file(struct inode *inode, struct file *file); 1932int btrfs_release_file(struct inode *inode, struct file *file);
1928 1933
1929/* tree-defrag.c */ 1934/* tree-defrag.c */
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 1eb69a91b72..8af39521eb7 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2147,6 +2147,9 @@ static int noinline find_free_extent(struct btrfs_trans_handle *trans,
2147 total_needed += empty_size; 2147 total_needed += empty_size;
2148 2148
2149 block_group = btrfs_lookup_block_group(root->fs_info, search_start); 2149 block_group = btrfs_lookup_block_group(root->fs_info, search_start);
2150 if (!block_group)
2151 block_group = btrfs_lookup_first_block_group(root->fs_info,
2152 search_start);
2150 space_info = __find_space_info(root->fs_info, data); 2153 space_info = __find_space_info(root->fs_info, data);
2151 2154
2152 down_read(&space_info->groups_sem); 2155 down_read(&space_info->groups_sem);
@@ -3426,9 +3429,7 @@ walk_down:
3426next: 3429next:
3427 level--; 3430 level--;
3428 btrfs_release_path(extent_root, path); 3431 btrfs_release_path(extent_root, path);
3429 if (need_resched()) { 3432 cond_resched();
3430 cond_resched();
3431 }
3432 } 3433 }
3433 /* reached lowest level */ 3434 /* reached lowest level */
3434 ret = 1; 3435 ret = 1;
@@ -3539,9 +3540,7 @@ found:
3539 } 3540 }
3540 3541
3541 btrfs_release_path(extent_root, path); 3542 btrfs_release_path(extent_root, path);
3542 if (need_resched()) { 3543 cond_resched();
3543 cond_resched();
3544 }
3545 } 3544 }
3546 /* reached max tree level, but no tree root found. */ 3545 /* reached max tree level, but no tree root found. */
3547 BUG(); 3546 BUG();
@@ -3654,8 +3653,9 @@ static int noinline get_new_locations(struct inode *reloc_inode,
3654 exts[nr].encryption = btrfs_file_extent_encryption(leaf, fi); 3653 exts[nr].encryption = btrfs_file_extent_encryption(leaf, fi);
3655 exts[nr].other_encoding = btrfs_file_extent_other_encoding(leaf, 3654 exts[nr].other_encoding = btrfs_file_extent_other_encoding(leaf,
3656 fi); 3655 fi);
3657 WARN_ON(exts[nr].offset > 0); 3656 BUG_ON(exts[nr].offset > 0);
3658 WARN_ON(exts[nr].num_bytes != exts[nr].disk_num_bytes); 3657 BUG_ON(exts[nr].compression || exts[nr].encryption);
3658 BUG_ON(exts[nr].num_bytes != exts[nr].disk_num_bytes);
3659 3659
3660 cur_pos += exts[nr].num_bytes; 3660 cur_pos += exts[nr].num_bytes;
3661 nr++; 3661 nr++;
@@ -3709,6 +3709,7 @@ static int noinline replace_one_extent(struct btrfs_trans_handle *trans,
3709 u32 nritems; 3709 u32 nritems;
3710 int nr_scaned = 0; 3710 int nr_scaned = 0;
3711 int extent_locked = 0; 3711 int extent_locked = 0;
3712 int extent_type;
3712 int ret; 3713 int ret;
3713 3714
3714 memcpy(&key, leaf_key, sizeof(key)); 3715 memcpy(&key, leaf_key, sizeof(key));
@@ -3781,8 +3782,9 @@ next:
3781 } 3782 }
3782 fi = btrfs_item_ptr(leaf, path->slots[0], 3783 fi = btrfs_item_ptr(leaf, path->slots[0],
3783 struct btrfs_file_extent_item); 3784 struct btrfs_file_extent_item);
3784 if ((btrfs_file_extent_type(leaf, fi) != 3785 extent_type = btrfs_file_extent_type(leaf, fi);
3785 BTRFS_FILE_EXTENT_REG) || 3786 if ((extent_type != BTRFS_FILE_EXTENT_REG &&
3787 extent_type != BTRFS_FILE_EXTENT_PREALLOC) ||
3786 (btrfs_file_extent_disk_bytenr(leaf, fi) != 3788 (btrfs_file_extent_disk_bytenr(leaf, fi) !=
3787 extent_key->objectid)) { 3789 extent_key->objectid)) {
3788 path->slots[0]++; 3790 path->slots[0]++;
@@ -3865,16 +3867,10 @@ next:
3865 3867
3866 if (nr_extents == 1) { 3868 if (nr_extents == 1) {
3867 /* update extent pointer in place */ 3869 /* update extent pointer in place */
3868 btrfs_set_file_extent_generation(leaf, fi,
3869 trans->transid);
3870 btrfs_set_file_extent_disk_bytenr(leaf, fi, 3870 btrfs_set_file_extent_disk_bytenr(leaf, fi,
3871 new_extents[0].disk_bytenr); 3871 new_extents[0].disk_bytenr);
3872 btrfs_set_file_extent_disk_num_bytes(leaf, fi, 3872 btrfs_set_file_extent_disk_num_bytes(leaf, fi,
3873 new_extents[0].disk_num_bytes); 3873 new_extents[0].disk_num_bytes);
3874 btrfs_set_file_extent_ram_bytes(leaf, fi,
3875 new_extents[0].ram_bytes);
3876 ext_offset += new_extents[0].offset;
3877 btrfs_set_file_extent_offset(leaf, fi, ext_offset);
3878 btrfs_mark_buffer_dirty(leaf); 3874 btrfs_mark_buffer_dirty(leaf);
3879 3875
3880 btrfs_drop_extent_cache(inode, key.offset, 3876 btrfs_drop_extent_cache(inode, key.offset,
@@ -3901,6 +3897,8 @@ next:
3901 btrfs_release_path(root, path); 3897 btrfs_release_path(root, path);
3902 key.offset += num_bytes; 3898 key.offset += num_bytes;
3903 } else { 3899 } else {
3900 BUG_ON(1);
3901#if 0
3904 u64 alloc_hint; 3902 u64 alloc_hint;
3905 u64 extent_len; 3903 u64 extent_len;
3906 int i; 3904 int i;
@@ -3977,6 +3975,7 @@ next:
3977 break; 3975 break;
3978 } 3976 }
3979 BUG_ON(i >= nr_extents); 3977 BUG_ON(i >= nr_extents);
3978#endif
3980 } 3979 }
3981 3980
3982 if (extent_locked) { 3981 if (extent_locked) {
@@ -4156,15 +4155,10 @@ static int noinline replace_extents_in_leaf(struct btrfs_trans_handle *trans,
4156 ref->extents[ext_index].bytenr = new_extent->disk_bytenr; 4155 ref->extents[ext_index].bytenr = new_extent->disk_bytenr;
4157 ref->extents[ext_index].num_bytes = new_extent->disk_num_bytes; 4156 ref->extents[ext_index].num_bytes = new_extent->disk_num_bytes;
4158 4157
4159 btrfs_set_file_extent_generation(leaf, fi, trans->transid);
4160 btrfs_set_file_extent_ram_bytes(leaf, fi,
4161 new_extent->ram_bytes);
4162 btrfs_set_file_extent_disk_bytenr(leaf, fi, 4158 btrfs_set_file_extent_disk_bytenr(leaf, fi,
4163 new_extent->disk_bytenr); 4159 new_extent->disk_bytenr);
4164 btrfs_set_file_extent_disk_num_bytes(leaf, fi, 4160 btrfs_set_file_extent_disk_num_bytes(leaf, fi,
4165 new_extent->disk_num_bytes); 4161 new_extent->disk_num_bytes);
4166 new_extent->offset += btrfs_file_extent_offset(leaf, fi);
4167 btrfs_set_file_extent_offset(leaf, fi, new_extent->offset);
4168 btrfs_mark_buffer_dirty(leaf); 4162 btrfs_mark_buffer_dirty(leaf);
4169 4163
4170 ret = btrfs_inc_extent_ref(trans, root, 4164 ret = btrfs_inc_extent_ref(trans, root,
@@ -4625,12 +4619,15 @@ static int noinline relocate_one_extent(struct btrfs_root *extent_root,
4625 */ 4619 */
4626 if (!new_extents) { 4620 if (!new_extents) {
4627 u64 group_start = group->key.objectid; 4621 u64 group_start = group->key.objectid;
4622 new_extents = kmalloc(sizeof(*new_extents),
4623 GFP_NOFS);
4624 nr_extents = 1;
4628 ret = get_new_locations(reloc_inode, 4625 ret = get_new_locations(reloc_inode,
4629 extent_key, 4626 extent_key,
4630 group_start, 0, 4627 group_start, 1,
4631 &new_extents, 4628 &new_extents,
4632 &nr_extents); 4629 &nr_extents);
4633 if (ret < 0) 4630 if (ret)
4634 goto out; 4631 goto out;
4635 } 4632 }
4636 btrfs_record_root_in_trans(found_root); 4633 btrfs_record_root_in_trans(found_root);
@@ -4762,7 +4759,8 @@ static int __insert_orphan_inode(struct btrfs_trans_handle *trans,
4762 btrfs_set_inode_generation(leaf, item, 1); 4759 btrfs_set_inode_generation(leaf, item, 1);
4763 btrfs_set_inode_size(leaf, item, size); 4760 btrfs_set_inode_size(leaf, item, size);
4764 btrfs_set_inode_mode(leaf, item, S_IFREG | 0600); 4761 btrfs_set_inode_mode(leaf, item, S_IFREG | 0600);
4765 btrfs_set_inode_flags(leaf, item, BTRFS_INODE_NODATASUM); 4762 btrfs_set_inode_flags(leaf, item, BTRFS_INODE_NODATASUM |
4763 BTRFS_INODE_NOCOMPRESS);
4766 btrfs_mark_buffer_dirty(leaf); 4764 btrfs_mark_buffer_dirty(leaf);
4767 btrfs_release_path(root, path); 4765 btrfs_release_path(root, path);
4768out: 4766out:
@@ -4835,6 +4833,7 @@ int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start)
4835 struct inode *reloc_inode; 4833 struct inode *reloc_inode;
4836 struct btrfs_block_group_cache *block_group; 4834 struct btrfs_block_group_cache *block_group;
4837 struct btrfs_key key; 4835 struct btrfs_key key;
4836 u64 skipped;
4838 u64 cur_byte; 4837 u64 cur_byte;
4839 u64 total_found; 4838 u64 total_found;
4840 u32 nritems; 4839 u32 nritems;
@@ -4864,6 +4863,7 @@ int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start)
4864 btrfs_start_delalloc_inodes(info->tree_root); 4863 btrfs_start_delalloc_inodes(info->tree_root);
4865 btrfs_wait_ordered_extents(info->tree_root, 0); 4864 btrfs_wait_ordered_extents(info->tree_root, 0);
4866again: 4865again:
4866 skipped = 0;
4867 total_found = 0; 4867 total_found = 0;
4868 progress = 0; 4868 progress = 0;
4869 key.objectid = block_group->key.objectid; 4869 key.objectid = block_group->key.objectid;
@@ -4926,6 +4926,8 @@ next:
4926 ret = relocate_one_extent(root, path, &key, block_group, 4926 ret = relocate_one_extent(root, path, &key, block_group,
4927 reloc_inode, pass); 4927 reloc_inode, pass);
4928 BUG_ON(ret < 0); 4928 BUG_ON(ret < 0);
4929 if (ret > 0)
4930 skipped++;
4929 4931
4930 key.objectid = cur_byte; 4932 key.objectid = cur_byte;
4931 key.type = 0; 4933 key.type = 0;
@@ -4944,6 +4946,11 @@ next:
4944 printk("btrfs found %llu extents in pass %d\n", 4946 printk("btrfs found %llu extents in pass %d\n",
4945 (unsigned long long)total_found, pass); 4947 (unsigned long long)total_found, pass);
4946 pass++; 4948 pass++;
4949 if (total_found == skipped && pass > 2) {
4950 iput(reloc_inode);
4951 reloc_inode = create_reloc_inode(info, block_group);
4952 pass = 0;
4953 }
4947 goto again; 4954 goto again;
4948 } 4955 }
4949 4956
@@ -5011,17 +5018,17 @@ int btrfs_free_block_groups(struct btrfs_fs_info *info)
5011 while ((n = rb_last(&info->block_group_cache_tree)) != NULL) { 5018 while ((n = rb_last(&info->block_group_cache_tree)) != NULL) {
5012 block_group = rb_entry(n, struct btrfs_block_group_cache, 5019 block_group = rb_entry(n, struct btrfs_block_group_cache,
5013 cache_node); 5020 cache_node);
5014
5015 spin_unlock(&info->block_group_cache_lock);
5016 btrfs_remove_free_space_cache(block_group);
5017 spin_lock(&info->block_group_cache_lock);
5018
5019 rb_erase(&block_group->cache_node, 5021 rb_erase(&block_group->cache_node,
5020 &info->block_group_cache_tree); 5022 &info->block_group_cache_tree);
5023 spin_unlock(&info->block_group_cache_lock);
5024
5025 btrfs_remove_free_space_cache(block_group);
5021 down_write(&block_group->space_info->groups_sem); 5026 down_write(&block_group->space_info->groups_sem);
5022 list_del(&block_group->list); 5027 list_del(&block_group->list);
5023 up_write(&block_group->space_info->groups_sem); 5028 up_write(&block_group->space_info->groups_sem);
5024 kfree(block_group); 5029 kfree(block_group);
5030
5031 spin_lock(&info->block_group_cache_lock);
5025 } 5032 }
5026 spin_unlock(&info->block_group_cache_lock); 5033 spin_unlock(&info->block_group_cache_lock);
5027 return 0; 5034 return 0;
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 65a0583027e..eb3c12e7bea 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2015,6 +2015,8 @@ printk("2bad mapping end %Lu cur %Lu\n", end, cur);
2015 } 2015 }
2016 bdev = em->bdev; 2016 bdev = em->bdev;
2017 block_start = em->block_start; 2017 block_start = em->block_start;
2018 if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags))
2019 block_start = EXTENT_MAP_HOLE;
2018 free_extent_map(em); 2020 free_extent_map(em);
2019 em = NULL; 2021 em = NULL;
2020 2022
@@ -2769,14 +2771,18 @@ sector_t extent_bmap(struct address_space *mapping, sector_t iblock,
2769 struct inode *inode = mapping->host; 2771 struct inode *inode = mapping->host;
2770 u64 start = iblock << inode->i_blkbits; 2772 u64 start = iblock << inode->i_blkbits;
2771 sector_t sector = 0; 2773 sector_t sector = 0;
2774 size_t blksize = (1 << inode->i_blkbits);
2772 struct extent_map *em; 2775 struct extent_map *em;
2773 2776
2774 em = get_extent(inode, NULL, 0, start, (1 << inode->i_blkbits), 0); 2777 lock_extent(&BTRFS_I(inode)->io_tree, start, start + blksize - 1,
2778 GFP_NOFS);
2779 em = get_extent(inode, NULL, 0, start, blksize, 0);
2780 unlock_extent(&BTRFS_I(inode)->io_tree, start, start + blksize - 1,
2781 GFP_NOFS);
2775 if (!em || IS_ERR(em)) 2782 if (!em || IS_ERR(em))
2776 return 0; 2783 return 0;
2777 2784
2778 if (em->block_start == EXTENT_MAP_INLINE || 2785 if (em->block_start > EXTENT_MAP_LAST_BYTE)
2779 em->block_start == EXTENT_MAP_HOLE)
2780 goto out; 2786 goto out;
2781 2787
2782 sector = (em->block_start + start - em->start) >> inode->i_blkbits; 2788 sector = (em->block_start + start - em->start) >> inode->i_blkbits;
diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h
index e693e1b4ac4..accfedaeb51 100644
--- a/fs/btrfs/extent_map.h
+++ b/fs/btrfs/extent_map.h
@@ -12,6 +12,7 @@
12#define EXTENT_FLAG_PINNED 0 /* this entry not yet on disk, don't free it */ 12#define EXTENT_FLAG_PINNED 0 /* this entry not yet on disk, don't free it */
13#define EXTENT_FLAG_COMPRESSED 1 13#define EXTENT_FLAG_COMPRESSED 1
14#define EXTENT_FLAG_VACANCY 2 /* no file extent item found */ 14#define EXTENT_FLAG_VACANCY 2 /* no file extent item found */
15#define EXTENT_FLAG_PREALLOC 3 /* pre-allocated extent */
15 16
16struct extent_map { 17struct extent_map {
17 struct rb_node rb_node; 18 struct rb_node rb_node;
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 1a0510ad030..238a8e215eb 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -381,7 +381,7 @@ int noinline btrfs_drop_extents(struct btrfs_trans_handle *trans,
381 int keep; 381 int keep;
382 int slot; 382 int slot;
383 int bookend; 383 int bookend;
384 int found_type; 384 int found_type = 0;
385 int found_extent; 385 int found_extent;
386 int found_inline; 386 int found_inline;
387 int recow; 387 int recow;
@@ -442,7 +442,8 @@ next_slot:
442 extent); 442 extent);
443 other_encoding = btrfs_file_extent_other_encoding(leaf, 443 other_encoding = btrfs_file_extent_other_encoding(leaf,
444 extent); 444 extent);
445 if (found_type == BTRFS_FILE_EXTENT_REG) { 445 if (found_type == BTRFS_FILE_EXTENT_REG ||
446 found_type == BTRFS_FILE_EXTENT_PREALLOC) {
446 extent_end = 447 extent_end =
447 btrfs_file_extent_disk_bytenr(leaf, 448 btrfs_file_extent_disk_bytenr(leaf,
448 extent); 449 extent);
@@ -609,8 +610,7 @@ next_slot:
609 */ 610 */
610 btrfs_set_file_extent_ram_bytes(leaf, extent, 611 btrfs_set_file_extent_ram_bytes(leaf, extent,
611 ram_bytes); 612 ram_bytes);
612 btrfs_set_file_extent_type(leaf, extent, 613 btrfs_set_file_extent_type(leaf, extent, found_type);
613 BTRFS_FILE_EXTENT_REG);
614 614
615 btrfs_mark_buffer_dirty(path->nodes[0]); 615 btrfs_mark_buffer_dirty(path->nodes[0]);
616 616
@@ -661,6 +661,243 @@ out:
661 return ret; 661 return ret;
662} 662}
663 663
664static int extent_mergeable(struct extent_buffer *leaf, int slot,
665 u64 objectid, u64 bytenr, u64 *start, u64 *end)
666{
667 struct btrfs_file_extent_item *fi;
668 struct btrfs_key key;
669 u64 extent_end;
670
671 if (slot < 0 || slot >= btrfs_header_nritems(leaf))
672 return 0;
673
674 btrfs_item_key_to_cpu(leaf, &key, slot);
675 if (key.objectid != objectid || key.type != BTRFS_EXTENT_DATA_KEY)
676 return 0;
677
678 fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
679 if (btrfs_file_extent_type(leaf, fi) != BTRFS_FILE_EXTENT_REG ||
680 btrfs_file_extent_disk_bytenr(leaf, fi) != bytenr ||
681 btrfs_file_extent_compression(leaf, fi) ||
682 btrfs_file_extent_encryption(leaf, fi) ||
683 btrfs_file_extent_other_encoding(leaf, fi))
684 return 0;
685
686 extent_end = key.offset + btrfs_file_extent_num_bytes(leaf, fi);
687 if ((*start && *start != key.offset) || (*end && *end != extent_end))
688 return 0;
689
690 *start = key.offset;
691 *end = extent_end;
692 return 1;
693}
694
695/*
696 * Mark extent in the range start - end as written.
697 *
698 * This changes extent type from 'pre-allocated' to 'regular'. If only
699 * part of extent is marked as written, the extent will be split into
700 * two or three.
701 */
702int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
703 struct btrfs_root *root,
704 struct inode *inode, u64 start, u64 end)
705{
706 struct extent_buffer *leaf;
707 struct btrfs_path *path;
708 struct btrfs_file_extent_item *fi;
709 struct btrfs_key key;
710 u64 bytenr;
711 u64 num_bytes;
712 u64 extent_end;
713 u64 extent_offset;
714 u64 other_start;
715 u64 other_end;
716 u64 split = start;
717 u64 locked_end = end;
718 int extent_type;
719 int split_end = 1;
720 int ret;
721
722 btrfs_drop_extent_cache(inode, start, end - 1, 0);
723
724 path = btrfs_alloc_path();
725 BUG_ON(!path);
726again:
727 key.objectid = inode->i_ino;
728 key.type = BTRFS_EXTENT_DATA_KEY;
729 if (split == start)
730 key.offset = split;
731 else
732 key.offset = split - 1;
733
734 ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
735 if (ret > 0 && path->slots[0] > 0)
736 path->slots[0]--;
737
738 leaf = path->nodes[0];
739 btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
740 BUG_ON(key.objectid != inode->i_ino ||
741 key.type != BTRFS_EXTENT_DATA_KEY);
742 fi = btrfs_item_ptr(leaf, path->slots[0],
743 struct btrfs_file_extent_item);
744 extent_type = btrfs_file_extent_type(leaf, fi);
745 BUG_ON(extent_type != BTRFS_FILE_EXTENT_PREALLOC);
746 extent_end = key.offset + btrfs_file_extent_num_bytes(leaf, fi);
747 BUG_ON(key.offset > start || extent_end < end);
748
749 bytenr = btrfs_file_extent_disk_bytenr(leaf, fi);
750 num_bytes = btrfs_file_extent_disk_num_bytes(leaf, fi);
751 extent_offset = btrfs_file_extent_offset(leaf, fi);
752
753 if (key.offset == start)
754 split = end;
755
756 if (key.offset == start && extent_end == end) {
757 int del_nr = 0;
758 int del_slot = 0;
759 u64 leaf_owner = btrfs_header_owner(leaf);
760 u64 leaf_gen = btrfs_header_generation(leaf);
761 other_start = end;
762 other_end = 0;
763 if (extent_mergeable(leaf, path->slots[0] + 1, inode->i_ino,
764 bytenr, &other_start, &other_end)) {
765 extent_end = other_end;
766 del_slot = path->slots[0] + 1;
767 del_nr++;
768 ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
769 leaf->start, leaf_owner,
770 leaf_gen, inode->i_ino, 0);
771 BUG_ON(ret);
772 }
773 other_start = 0;
774 other_end = start;
775 if (extent_mergeable(leaf, path->slots[0] - 1, inode->i_ino,
776 bytenr, &other_start, &other_end)) {
777 key.offset = other_start;
778 del_slot = path->slots[0];
779 del_nr++;
780 ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
781 leaf->start, leaf_owner,
782 leaf_gen, inode->i_ino, 0);
783 BUG_ON(ret);
784 }
785 split_end = 0;
786 if (del_nr == 0) {
787 btrfs_set_file_extent_type(leaf, fi,
788 BTRFS_FILE_EXTENT_REG);
789 goto done;
790 }
791
792 fi = btrfs_item_ptr(leaf, del_slot - 1,
793 struct btrfs_file_extent_item);
794 btrfs_set_file_extent_type(leaf, fi, BTRFS_FILE_EXTENT_REG);
795 btrfs_set_file_extent_num_bytes(leaf, fi,
796 extent_end - key.offset);
797 btrfs_mark_buffer_dirty(leaf);
798
799 ret = btrfs_del_items(trans, root, path, del_slot, del_nr);
800 BUG_ON(ret);
801 goto done;
802 } else if (split == start) {
803 if (locked_end < extent_end) {
804 ret = try_lock_extent(&BTRFS_I(inode)->io_tree,
805 locked_end, extent_end - 1, GFP_NOFS);
806 if (!ret) {
807 btrfs_release_path(root, path);
808 lock_extent(&BTRFS_I(inode)->io_tree,
809 locked_end, extent_end - 1, GFP_NOFS);
810 locked_end = extent_end;
811 goto again;
812 }
813 locked_end = extent_end;
814 }
815 btrfs_set_file_extent_num_bytes(leaf, fi, split - key.offset);
816 extent_offset += split - key.offset;
817 } else {
818 BUG_ON(key.offset != start);
819 btrfs_set_file_extent_offset(leaf, fi, extent_offset +
820 split - key.offset);
821 btrfs_set_file_extent_num_bytes(leaf, fi, extent_end - split);
822 key.offset = split;
823 btrfs_set_item_key_safe(trans, root, path, &key);
824 extent_end = split;
825 }
826
827 if (extent_end == end) {
828 split_end = 0;
829 extent_type = BTRFS_FILE_EXTENT_REG;
830 }
831 if (extent_end == end && split == start) {
832 other_start = end;
833 other_end = 0;
834 if (extent_mergeable(leaf, path->slots[0] + 1, inode->i_ino,
835 bytenr, &other_start, &other_end)) {
836 path->slots[0]++;
837 fi = btrfs_item_ptr(leaf, path->slots[0],
838 struct btrfs_file_extent_item);
839 key.offset = split;
840 btrfs_set_item_key_safe(trans, root, path, &key);
841 btrfs_set_file_extent_offset(leaf, fi, extent_offset);
842 btrfs_set_file_extent_num_bytes(leaf, fi,
843 other_end - split);
844 goto done;
845 }
846 }
847 if (extent_end == end && split == end) {
848 other_start = 0;
849 other_end = start;
850 if (extent_mergeable(leaf, path->slots[0] - 1 , inode->i_ino,
851 bytenr, &other_start, &other_end)) {
852 path->slots[0]--;
853 fi = btrfs_item_ptr(leaf, path->slots[0],
854 struct btrfs_file_extent_item);
855 btrfs_set_file_extent_num_bytes(leaf, fi, extent_end -
856 other_start);
857 goto done;
858 }
859 }
860
861 btrfs_mark_buffer_dirty(leaf);
862 btrfs_release_path(root, path);
863
864 key.offset = start;
865 ret = btrfs_insert_empty_item(trans, root, path, &key, sizeof(*fi));
866 BUG_ON(ret);
867
868 leaf = path->nodes[0];
869 fi = btrfs_item_ptr(leaf, path->slots[0],
870 struct btrfs_file_extent_item);
871 btrfs_set_file_extent_generation(leaf, fi, trans->transid);
872 btrfs_set_file_extent_type(leaf, fi, extent_type);
873 btrfs_set_file_extent_disk_bytenr(leaf, fi, bytenr);
874 btrfs_set_file_extent_disk_num_bytes(leaf, fi, num_bytes);
875 btrfs_set_file_extent_offset(leaf, fi, extent_offset);
876 btrfs_set_file_extent_num_bytes(leaf, fi, extent_end - key.offset);
877 btrfs_set_file_extent_ram_bytes(leaf, fi, num_bytes);
878 btrfs_set_file_extent_compression(leaf, fi, 0);
879 btrfs_set_file_extent_encryption(leaf, fi, 0);
880 btrfs_set_file_extent_other_encoding(leaf, fi, 0);
881
882 ret = btrfs_inc_extent_ref(trans, root, bytenr, num_bytes,
883 leaf->start, root->root_key.objectid,
884 trans->transid, inode->i_ino);
885 BUG_ON(ret);
886done:
887 btrfs_mark_buffer_dirty(leaf);
888 btrfs_release_path(root, path);
889 if (split_end && split == start) {
890 split = end;
891 goto again;
892 }
893 if (locked_end > end) {
894 unlock_extent(&BTRFS_I(inode)->io_tree, end, locked_end - 1,
895 GFP_NOFS);
896 }
897 btrfs_free_path(path);
898 return 0;
899}
900
664/* 901/*
665 * this gets pages into the page cache and locks them down, it also properly 902 * this gets pages into the page cache and locks them down, it also properly
666 * waits for data=ordered extents to finish before allowing the pages to be 903 * waits for data=ordered extents to finish before allowing the pages to be
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 3e6f0568fdb..789c376157f 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -37,6 +37,7 @@
37#include <linux/version.h> 37#include <linux/version.h>
38#include <linux/xattr.h> 38#include <linux/xattr.h>
39#include <linux/posix_acl.h> 39#include <linux/posix_acl.h>
40#include <linux/falloc.h>
40#include "ctree.h" 41#include "ctree.h"
41#include "disk-io.h" 42#include "disk-io.h"
42#include "transaction.h" 43#include "transaction.h"
@@ -587,7 +588,7 @@ free_pages_out:
587 * blocks on disk 588 * blocks on disk
588 */ 589 */
589static int run_delalloc_nocow(struct inode *inode, struct page *locked_page, 590static int run_delalloc_nocow(struct inode *inode, struct page *locked_page,
590 u64 start, u64 end, int *page_started) 591 u64 start, u64 end, int *page_started, int force)
591{ 592{
592 struct btrfs_root *root = BTRFS_I(inode)->root; 593 struct btrfs_root *root = BTRFS_I(inode)->root;
593 struct btrfs_trans_handle *trans; 594 struct btrfs_trans_handle *trans;
@@ -602,6 +603,7 @@ static int run_delalloc_nocow(struct inode *inode, struct page *locked_page,
602 u64 num_bytes; 603 u64 num_bytes;
603 int extent_type; 604 int extent_type;
604 int ret; 605 int ret;
606 int type;
605 int nocow; 607 int nocow;
606 int check_prev = 1; 608 int check_prev = 1;
607 609
@@ -654,7 +656,8 @@ next_slot:
654 struct btrfs_file_extent_item); 656 struct btrfs_file_extent_item);
655 extent_type = btrfs_file_extent_type(leaf, fi); 657 extent_type = btrfs_file_extent_type(leaf, fi);
656 658
657 if (extent_type == BTRFS_FILE_EXTENT_REG) { 659 if (extent_type == BTRFS_FILE_EXTENT_REG ||
660 extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
658 struct btrfs_block_group_cache *block_group; 661 struct btrfs_block_group_cache *block_group;
659 disk_bytenr = btrfs_file_extent_disk_bytenr(leaf, fi); 662 disk_bytenr = btrfs_file_extent_disk_bytenr(leaf, fi);
660 extent_end = found_key.offset + 663 extent_end = found_key.offset +
@@ -669,6 +672,8 @@ next_slot:
669 goto out_check; 672 goto out_check;
670 if (disk_bytenr == 0) 673 if (disk_bytenr == 0)
671 goto out_check; 674 goto out_check;
675 if (extent_type == BTRFS_FILE_EXTENT_REG && !force)
676 goto out_check;
672 if (btrfs_cross_ref_exist(trans, root, disk_bytenr)) 677 if (btrfs_cross_ref_exist(trans, root, disk_bytenr))
673 goto out_check; 678 goto out_check;
674 block_group = btrfs_lookup_block_group(root->fs_info, 679 block_group = btrfs_lookup_block_group(root->fs_info,
@@ -709,10 +714,39 @@ out_check:
709 714
710 disk_bytenr += cur_offset - found_key.offset; 715 disk_bytenr += cur_offset - found_key.offset;
711 num_bytes = min(end + 1, extent_end) - cur_offset; 716 num_bytes = min(end + 1, extent_end) - cur_offset;
717 if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
718 struct extent_map *em;
719 struct extent_map_tree *em_tree;
720 em_tree = &BTRFS_I(inode)->extent_tree;
721 em = alloc_extent_map(GFP_NOFS);
722 em->start = cur_offset;
723 em->len = num_bytes;
724 em->block_len = num_bytes;
725 em->block_start = disk_bytenr;
726 em->bdev = root->fs_info->fs_devices->latest_bdev;
727 set_bit(EXTENT_FLAG_PINNED, &em->flags);
728 while (1) {
729 spin_lock(&em_tree->lock);
730 ret = add_extent_mapping(em_tree, em);
731 spin_unlock(&em_tree->lock);
732 if (ret != -EEXIST) {
733 free_extent_map(em);
734 break;
735 }
736 btrfs_drop_extent_cache(inode, em->start,
737 em->start + em->len - 1, 0);
738 }
739 type = BTRFS_ORDERED_PREALLOC;
740 } else {
741 type = BTRFS_ORDERED_NOCOW;
742 }
712 743
713 ret = btrfs_add_ordered_extent(inode, cur_offset, disk_bytenr, 744 ret = btrfs_add_ordered_extent(inode, cur_offset, disk_bytenr,
714 num_bytes, num_bytes, 745 num_bytes, num_bytes, type);
715 BTRFS_ORDERED_NOCOW); 746 BUG_ON(ret);
747 extent_clear_unlock_delalloc(inode, &BTRFS_I(inode)->io_tree,
748 cur_offset, cur_offset + num_bytes - 1,
749 locked_page, 0, 0, 0);
716 cur_offset = extent_end; 750 cur_offset = extent_end;
717 if (cur_offset > end) 751 if (cur_offset > end)
718 break; 752 break;
@@ -745,7 +779,10 @@ static int run_delalloc_range(struct inode *inode, struct page *locked_page,
745 if (btrfs_test_opt(root, NODATACOW) || 779 if (btrfs_test_opt(root, NODATACOW) ||
746 btrfs_test_flag(inode, NODATACOW)) 780 btrfs_test_flag(inode, NODATACOW))
747 ret = run_delalloc_nocow(inode, locked_page, start, end, 781 ret = run_delalloc_nocow(inode, locked_page, start, end,
748 page_started); 782 page_started, 0);
783 else if (btrfs_test_flag(inode, PREALLOC))
784 ret = run_delalloc_nocow(inode, locked_page, start, end,
785 page_started, 1);
749 else 786 else
750 ret = cow_file_range(inode, locked_page, start, end, 787 ret = cow_file_range(inode, locked_page, start, end,
751 page_started); 788 page_started);
@@ -1006,6 +1043,63 @@ int btrfs_writepage_start_hook(struct page *page, u64 start, u64 end)
1006 return -EAGAIN; 1043 return -EAGAIN;
1007} 1044}
1008 1045
1046static int insert_reserved_file_extent(struct btrfs_trans_handle *trans,
1047 struct inode *inode, u64 file_pos,
1048 u64 disk_bytenr, u64 disk_num_bytes,
1049 u64 num_bytes, u64 ram_bytes,
1050 u8 compression, u8 encryption,
1051 u16 other_encoding, int extent_type)
1052{
1053 struct btrfs_root *root = BTRFS_I(inode)->root;
1054 struct btrfs_file_extent_item *fi;
1055 struct btrfs_path *path;
1056 struct extent_buffer *leaf;
1057 struct btrfs_key ins;
1058 u64 hint;
1059 int ret;
1060
1061 path = btrfs_alloc_path();
1062 BUG_ON(!path);
1063
1064 ret = btrfs_drop_extents(trans, root, inode, file_pos,
1065 file_pos + num_bytes, file_pos, &hint);
1066 BUG_ON(ret);
1067
1068 ins.objectid = inode->i_ino;
1069 ins.offset = file_pos;
1070 ins.type = BTRFS_EXTENT_DATA_KEY;
1071 ret = btrfs_insert_empty_item(trans, root, path, &ins, sizeof(*fi));
1072 BUG_ON(ret);
1073 leaf = path->nodes[0];
1074 fi = btrfs_item_ptr(leaf, path->slots[0],
1075 struct btrfs_file_extent_item);
1076 btrfs_set_file_extent_generation(leaf, fi, trans->transid);
1077 btrfs_set_file_extent_type(leaf, fi, extent_type);
1078 btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
1079 btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_num_bytes);
1080 btrfs_set_file_extent_offset(leaf, fi, 0);
1081 btrfs_set_file_extent_num_bytes(leaf, fi, num_bytes);
1082 btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes);
1083 btrfs_set_file_extent_compression(leaf, fi, compression);
1084 btrfs_set_file_extent_encryption(leaf, fi, encryption);
1085 btrfs_set_file_extent_other_encoding(leaf, fi, other_encoding);
1086 btrfs_mark_buffer_dirty(leaf);
1087
1088 inode_add_bytes(inode, num_bytes);
1089 btrfs_drop_extent_cache(inode, file_pos, file_pos + num_bytes - 1, 0);
1090
1091 ins.objectid = disk_bytenr;
1092 ins.offset = disk_num_bytes;
1093 ins.type = BTRFS_EXTENT_ITEM_KEY;
1094 ret = btrfs_alloc_reserved_extent(trans, root, leaf->start,
1095 root->root_key.objectid,
1096 trans->transid, inode->i_ino, &ins);
1097 BUG_ON(ret);
1098
1099 btrfs_free_path(path);
1100 return 0;
1101}
1102
1009/* as ordered data IO finishes, this gets called so we can finish 1103/* as ordered data IO finishes, this gets called so we can finish
1010 * an ordered extent if the range of bytes in the file it covers are 1104 * an ordered extent if the range of bytes in the file it covers are
1011 * fully written. 1105 * fully written.
@@ -1016,12 +1110,7 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end)
1016 struct btrfs_trans_handle *trans; 1110 struct btrfs_trans_handle *trans;
1017 struct btrfs_ordered_extent *ordered_extent; 1111 struct btrfs_ordered_extent *ordered_extent;
1018 struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree; 1112 struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
1019 struct btrfs_file_extent_item *extent_item; 1113 int compressed = 0;
1020 struct btrfs_path *path = NULL;
1021 struct extent_buffer *leaf;
1022 u64 alloc_hint = 0;
1023 struct list_head list;
1024 struct btrfs_key ins;
1025 int ret; 1114 int ret;
1026 1115
1027 ret = btrfs_dec_test_ordered_pending(inode, start, end - start + 1); 1116 ret = btrfs_dec_test_ordered_pending(inode, start, end - start + 1);
@@ -1035,67 +1124,30 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end)
1035 if (test_bit(BTRFS_ORDERED_NOCOW, &ordered_extent->flags)) 1124 if (test_bit(BTRFS_ORDERED_NOCOW, &ordered_extent->flags))
1036 goto nocow; 1125 goto nocow;
1037 1126
1038 path = btrfs_alloc_path();
1039 BUG_ON(!path);
1040
1041 lock_extent(io_tree, ordered_extent->file_offset, 1127 lock_extent(io_tree, ordered_extent->file_offset,
1042 ordered_extent->file_offset + ordered_extent->len - 1, 1128 ordered_extent->file_offset + ordered_extent->len - 1,
1043 GFP_NOFS); 1129 GFP_NOFS);
1044 1130
1045 INIT_LIST_HEAD(&list);
1046
1047 ret = btrfs_drop_extents(trans, root, inode,
1048 ordered_extent->file_offset,
1049 ordered_extent->file_offset +
1050 ordered_extent->len,
1051 ordered_extent->file_offset, &alloc_hint);
1052 BUG_ON(ret);
1053
1054 ins.objectid = inode->i_ino;
1055 ins.offset = ordered_extent->file_offset;
1056 ins.type = BTRFS_EXTENT_DATA_KEY;
1057 ret = btrfs_insert_empty_item(trans, root, path, &ins,
1058 sizeof(*extent_item));
1059 BUG_ON(ret);
1060 leaf = path->nodes[0];
1061 extent_item = btrfs_item_ptr(leaf, path->slots[0],
1062 struct btrfs_file_extent_item);
1063 btrfs_set_file_extent_generation(leaf, extent_item, trans->transid);
1064 btrfs_set_file_extent_type(leaf, extent_item, BTRFS_FILE_EXTENT_REG);
1065 btrfs_set_file_extent_disk_bytenr(leaf, extent_item,
1066 ordered_extent->start);
1067 btrfs_set_file_extent_disk_num_bytes(leaf, extent_item,
1068 ordered_extent->disk_len);
1069 btrfs_set_file_extent_offset(leaf, extent_item, 0);
1070
1071 if (test_bit(BTRFS_ORDERED_COMPRESSED, &ordered_extent->flags)) 1131 if (test_bit(BTRFS_ORDERED_COMPRESSED, &ordered_extent->flags))
1072 btrfs_set_file_extent_compression(leaf, extent_item, 1); 1132 compressed = 1;
1073 else 1133 if (test_bit(BTRFS_ORDERED_PREALLOC, &ordered_extent->flags)) {
1074 btrfs_set_file_extent_compression(leaf, extent_item, 0); 1134 BUG_ON(compressed);
1075 btrfs_set_file_extent_encryption(leaf, extent_item, 0); 1135 ret = btrfs_mark_extent_written(trans, root, inode,
1076 btrfs_set_file_extent_other_encoding(leaf, extent_item, 0); 1136 ordered_extent->file_offset,
1077 1137 ordered_extent->file_offset +
1078 /* ram bytes = extent_num_bytes for now */ 1138 ordered_extent->len);
1079 btrfs_set_file_extent_num_bytes(leaf, extent_item, 1139 BUG_ON(ret);
1080 ordered_extent->len); 1140 } else {
1081 btrfs_set_file_extent_ram_bytes(leaf, extent_item, 1141 ret = insert_reserved_file_extent(trans, inode,
1082 ordered_extent->len); 1142 ordered_extent->file_offset,
1083 btrfs_mark_buffer_dirty(leaf); 1143 ordered_extent->start,
1084 1144 ordered_extent->disk_len,
1085 btrfs_drop_extent_cache(inode, ordered_extent->file_offset, 1145 ordered_extent->len,
1086 ordered_extent->file_offset + 1146 ordered_extent->len,
1087 ordered_extent->len - 1, 0); 1147 compressed, 0, 0,
1088 1148 BTRFS_FILE_EXTENT_REG);
1089 ins.objectid = ordered_extent->start; 1149 BUG_ON(ret);
1090 ins.offset = ordered_extent->disk_len; 1150 }
1091 ins.type = BTRFS_EXTENT_ITEM_KEY;
1092 ret = btrfs_alloc_reserved_extent(trans, root, leaf->start,
1093 root->root_key.objectid,
1094 trans->transid, inode->i_ino, &ins);
1095 BUG_ON(ret);
1096 btrfs_release_path(root, path);
1097
1098 inode_add_bytes(inode, ordered_extent->len);
1099 unlock_extent(io_tree, ordered_extent->file_offset, 1151 unlock_extent(io_tree, ordered_extent->file_offset,
1100 ordered_extent->file_offset + ordered_extent->len - 1, 1152 ordered_extent->file_offset + ordered_extent->len - 1,
1101 GFP_NOFS); 1153 GFP_NOFS);
@@ -1115,8 +1167,6 @@ nocow:
1115 btrfs_put_ordered_extent(ordered_extent); 1167 btrfs_put_ordered_extent(ordered_extent);
1116 1168
1117 btrfs_end_transaction(trans, root); 1169 btrfs_end_transaction(trans, root);
1118 if (path)
1119 btrfs_free_path(path);
1120 return 0; 1170 return 0;
1121} 1171}
1122 1172
@@ -3488,7 +3538,8 @@ again:
3488 found_type = btrfs_file_extent_type(leaf, item); 3538 found_type = btrfs_file_extent_type(leaf, item);
3489 extent_start = found_key.offset; 3539 extent_start = found_key.offset;
3490 compressed = btrfs_file_extent_compression(leaf, item); 3540 compressed = btrfs_file_extent_compression(leaf, item);
3491 if (found_type == BTRFS_FILE_EXTENT_REG) { 3541 if (found_type == BTRFS_FILE_EXTENT_REG ||
3542 found_type == BTRFS_FILE_EXTENT_PREALLOC) {
3492 extent_end = extent_start + 3543 extent_end = extent_start +
3493 btrfs_file_extent_num_bytes(leaf, item); 3544 btrfs_file_extent_num_bytes(leaf, item);
3494 } else if (found_type == BTRFS_FILE_EXTENT_INLINE) { 3545 } else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
@@ -3521,7 +3572,8 @@ again:
3521 goto not_found_em; 3572 goto not_found_em;
3522 } 3573 }
3523 3574
3524 if (found_type == BTRFS_FILE_EXTENT_REG) { 3575 if (found_type == BTRFS_FILE_EXTENT_REG ||
3576 found_type == BTRFS_FILE_EXTENT_PREALLOC) {
3525 em->start = extent_start; 3577 em->start = extent_start;
3526 em->len = extent_end - extent_start; 3578 em->len = extent_end - extent_start;
3527 bytenr = btrfs_file_extent_disk_bytenr(leaf, item); 3579 bytenr = btrfs_file_extent_disk_bytenr(leaf, item);
@@ -3538,6 +3590,8 @@ again:
3538 bytenr += btrfs_file_extent_offset(leaf, item); 3590 bytenr += btrfs_file_extent_offset(leaf, item);
3539 em->block_start = bytenr; 3591 em->block_start = bytenr;
3540 em->block_len = em->len; 3592 em->block_len = em->len;
3593 if (found_type == BTRFS_FILE_EXTENT_PREALLOC)
3594 set_bit(EXTENT_FLAG_PREALLOC, &em->flags);
3541 } 3595 }
3542 goto insert; 3596 goto insert;
3543 } else if (found_type == BTRFS_FILE_EXTENT_INLINE) { 3597 } else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
@@ -3969,6 +4023,7 @@ int btrfs_create_subvol_root(struct btrfs_root *new_root, struct dentry *dentry,
3969 if (error) 4023 if (error)
3970 return error; 4024 return error;
3971 4025
4026 atomic_inc(&inode->i_count);
3972 d_instantiate(dentry, inode); 4027 d_instantiate(dentry, inode);
3973 return 0; 4028 return 0;
3974} 4029}
@@ -4318,6 +4373,7 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
4318 inode->i_op = &btrfs_symlink_inode_operations; 4373 inode->i_op = &btrfs_symlink_inode_operations;
4319 inode->i_mapping->a_ops = &btrfs_symlink_aops; 4374 inode->i_mapping->a_ops = &btrfs_symlink_aops;
4320 inode->i_mapping->backing_dev_info = &root->fs_info->bdi; 4375 inode->i_mapping->backing_dev_info = &root->fs_info->bdi;
4376 inode_set_bytes(inode, name_len);
4321 btrfs_i_size_write(inode, name_len - 1); 4377 btrfs_i_size_write(inode, name_len - 1);
4322 err = btrfs_update_inode(trans, root, inode); 4378 err = btrfs_update_inode(trans, root, inode);
4323 if (err) 4379 if (err)
@@ -4335,6 +4391,130 @@ out_fail:
4335 return err; 4391 return err;
4336} 4392}
4337 4393
4394static int prealloc_file_range(struct inode *inode, u64 start, u64 end,
4395 u64 alloc_hint, int mode)
4396{
4397 struct btrfs_trans_handle *trans;
4398 struct btrfs_root *root = BTRFS_I(inode)->root;
4399 struct btrfs_key ins;
4400 u64 alloc_size;
4401 u64 cur_offset = start;
4402 u64 num_bytes = end - start;
4403 int ret = 0;
4404
4405 trans = btrfs_join_transaction(root, 1);
4406 BUG_ON(!trans);
4407 btrfs_set_trans_block_group(trans, inode);
4408
4409 while (num_bytes > 0) {
4410 alloc_size = min(num_bytes, root->fs_info->max_extent);
4411 ret = btrfs_reserve_extent(trans, root, alloc_size,
4412 root->sectorsize, 0, alloc_hint,
4413 (u64)-1, &ins, 1);
4414 if (ret) {
4415 WARN_ON(1);
4416 goto out;
4417 }
4418 ret = insert_reserved_file_extent(trans, inode,
4419 cur_offset, ins.objectid,
4420 ins.offset, ins.offset,
4421 ins.offset, 0, 0, 0,
4422 BTRFS_FILE_EXTENT_PREALLOC);
4423 BUG_ON(ret);
4424 num_bytes -= ins.offset;
4425 cur_offset += ins.offset;
4426 alloc_hint = ins.objectid + ins.offset;
4427 }
4428out:
4429 if (cur_offset > start) {
4430 inode->i_ctime = CURRENT_TIME;
4431 btrfs_set_flag(inode, PREALLOC);
4432 if (!(mode & FALLOC_FL_KEEP_SIZE) &&
4433 cur_offset > i_size_read(inode))
4434 btrfs_i_size_write(inode, cur_offset);
4435 ret = btrfs_update_inode(trans, root, inode);
4436 BUG_ON(ret);
4437 }
4438
4439 btrfs_end_transaction(trans, root);
4440 return ret;
4441}
4442
4443static long btrfs_fallocate(struct inode *inode, int mode,
4444 loff_t offset, loff_t len)
4445{
4446 u64 cur_offset;
4447 u64 last_byte;
4448 u64 alloc_start;
4449 u64 alloc_end;
4450 u64 alloc_hint = 0;
4451 u64 mask = BTRFS_I(inode)->root->sectorsize - 1;
4452 struct extent_map *em;
4453 int ret;
4454
4455 alloc_start = offset & ~mask;
4456 alloc_end = (offset + len + mask) & ~mask;
4457
4458 mutex_lock(&inode->i_mutex);
4459 if (alloc_start > inode->i_size) {
4460 ret = btrfs_cont_expand(inode, alloc_start);
4461 if (ret)
4462 goto out;
4463 }
4464
4465 while (1) {
4466 struct btrfs_ordered_extent *ordered;
4467 lock_extent(&BTRFS_I(inode)->io_tree, alloc_start,
4468 alloc_end - 1, GFP_NOFS);
4469 ordered = btrfs_lookup_first_ordered_extent(inode,
4470 alloc_end - 1);
4471 if (ordered &&
4472 ordered->file_offset + ordered->len > alloc_start &&
4473 ordered->file_offset < alloc_end) {
4474 btrfs_put_ordered_extent(ordered);
4475 unlock_extent(&BTRFS_I(inode)->io_tree,
4476 alloc_start, alloc_end - 1, GFP_NOFS);
4477 btrfs_wait_ordered_range(inode, alloc_start,
4478 alloc_end - alloc_start);
4479 } else {
4480 if (ordered)
4481 btrfs_put_ordered_extent(ordered);
4482 break;
4483 }
4484 }
4485
4486 cur_offset = alloc_start;
4487 while (1) {
4488 em = btrfs_get_extent(inode, NULL, 0, cur_offset,
4489 alloc_end - cur_offset, 0);
4490 BUG_ON(IS_ERR(em) || !em);
4491 last_byte = min(extent_map_end(em), alloc_end);
4492 last_byte = (last_byte + mask) & ~mask;
4493 if (em->block_start == EXTENT_MAP_HOLE) {
4494 ret = prealloc_file_range(inode, cur_offset,
4495 last_byte, alloc_hint, mode);
4496 if (ret < 0) {
4497 free_extent_map(em);
4498 break;
4499 }
4500 }
4501 if (em->block_start <= EXTENT_MAP_LAST_BYTE)
4502 alloc_hint = em->block_start;
4503 free_extent_map(em);
4504
4505 cur_offset = last_byte;
4506 if (cur_offset >= alloc_end) {
4507 ret = 0;
4508 break;
4509 }
4510 }
4511 unlock_extent(&BTRFS_I(inode)->io_tree, alloc_start, alloc_end - 1,
4512 GFP_NOFS);
4513out:
4514 mutex_unlock(&inode->i_mutex);
4515 return ret;
4516}
4517
4338static int btrfs_set_page_dirty(struct page *page) 4518static int btrfs_set_page_dirty(struct page *page)
4339{ 4519{
4340 return __set_page_dirty_nobuffers(page); 4520 return __set_page_dirty_nobuffers(page);
@@ -4421,6 +4601,7 @@ static struct inode_operations btrfs_file_inode_operations = {
4421 .listxattr = btrfs_listxattr, 4601 .listxattr = btrfs_listxattr,
4422 .removexattr = btrfs_removexattr, 4602 .removexattr = btrfs_removexattr,
4423 .permission = btrfs_permission, 4603 .permission = btrfs_permission,
4604 .fallocate = btrfs_fallocate,
4424}; 4605};
4425static struct inode_operations btrfs_special_inode_operations = { 4606static struct inode_operations btrfs_special_inode_operations = {
4426 .getattr = btrfs_getattr, 4607 .getattr = btrfs_getattr,
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 7f915d47839..9ff2b4e0e92 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -724,7 +724,8 @@ long btrfs_ioctl_clone(struct file *file, unsigned long src_fd)
724 extent = btrfs_item_ptr(leaf, slot, 724 extent = btrfs_item_ptr(leaf, slot,
725 struct btrfs_file_extent_item); 725 struct btrfs_file_extent_item);
726 found_type = btrfs_file_extent_type(leaf, extent); 726 found_type = btrfs_file_extent_type(leaf, extent);
727 if (found_type == BTRFS_FILE_EXTENT_REG) { 727 if (found_type == BTRFS_FILE_EXTENT_REG ||
728 found_type == BTRFS_FILE_EXTENT_PREALLOC) {
728 u64 ds = btrfs_file_extent_disk_bytenr(leaf, 729 u64 ds = btrfs_file_extent_disk_bytenr(leaf,
729 extent); 730 extent);
730 u64 dl = btrfs_file_extent_disk_num_bytes(leaf, 731 u64 dl = btrfs_file_extent_disk_num_bytes(leaf,
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index e7317c8fda2..370bb428559 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -182,7 +182,7 @@ int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
182 entry->len = len; 182 entry->len = len;
183 entry->disk_len = disk_len; 183 entry->disk_len = disk_len;
184 entry->inode = inode; 184 entry->inode = inode;
185 if (type == BTRFS_ORDERED_NOCOW || type == BTRFS_ORDERED_COMPRESSED) 185 if (type != BTRFS_ORDERED_IO_DONE && type != BTRFS_ORDERED_COMPLETE)
186 set_bit(type, &entry->flags); 186 set_bit(type, &entry->flags);
187 187
188 /* one ref for the tree */ 188 /* one ref for the tree */
@@ -339,7 +339,8 @@ int btrfs_wait_ordered_extents(struct btrfs_root *root, int nocow_only)
339 ordered = list_entry(cur, struct btrfs_ordered_extent, 339 ordered = list_entry(cur, struct btrfs_ordered_extent,
340 root_extent_list); 340 root_extent_list);
341 if (nocow_only && 341 if (nocow_only &&
342 !test_bit(BTRFS_ORDERED_NOCOW, &ordered->flags)) { 342 !test_bit(BTRFS_ORDERED_NOCOW, &ordered->flags) &&
343 !test_bit(BTRFS_ORDERED_PREALLOC, &ordered->flags)) {
343 list_move(&ordered->root_extent_list, 344 list_move(&ordered->root_extent_list,
344 &root->fs_info->ordered_extents); 345 &root->fs_info->ordered_extents);
345 cond_resched_lock(&root->fs_info->ordered_extent_lock); 346 cond_resched_lock(&root->fs_info->ordered_extent_lock);
diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h
index e6d9bc54c2b..260bf95dfe0 100644
--- a/fs/btrfs/ordered-data.h
+++ b/fs/btrfs/ordered-data.h
@@ -68,6 +68,8 @@ struct btrfs_ordered_sum {
68 68
69#define BTRFS_ORDERED_COMPRESSED 3 /* writing a compressed extent */ 69#define BTRFS_ORDERED_COMPRESSED 3 /* writing a compressed extent */
70 70
71#define BTRFS_ORDERED_PREALLOC 4 /* set when writing to prealloced extent */
72
71struct btrfs_ordered_extent { 73struct btrfs_ordered_extent {
72 /* logical offset in the file */ 74 /* logical offset in the file */
73 u64 file_offset; 75 u64 file_offset;
@@ -132,7 +134,7 @@ int btrfs_remove_ordered_extent(struct inode *inode,
132int btrfs_dec_test_ordered_pending(struct inode *inode, 134int btrfs_dec_test_ordered_pending(struct inode *inode,
133 u64 file_offset, u64 io_size); 135 u64 file_offset, u64 io_size);
134int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset, 136int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
135 u64 start, u64 len, u64 disk_len, int type); 137 u64 start, u64 len, u64 disk_len, int tyep);
136int btrfs_add_ordered_sum(struct inode *inode, 138int btrfs_add_ordered_sum(struct inode *inode,
137 struct btrfs_ordered_extent *entry, 139 struct btrfs_ordered_extent *entry,
138 struct btrfs_ordered_sum *sum); 140 struct btrfs_ordered_sum *sum);
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index e0201c3a7dc..be4fc30a30e 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -442,7 +442,8 @@ insert:
442 442
443 fi = (struct btrfs_file_extent_item *)dst_ptr; 443 fi = (struct btrfs_file_extent_item *)dst_ptr;
444 extent_type = btrfs_file_extent_type(path->nodes[0], fi); 444 extent_type = btrfs_file_extent_type(path->nodes[0], fi);
445 if (extent_type == BTRFS_FILE_EXTENT_REG) { 445 if (extent_type == BTRFS_FILE_EXTENT_REG ||
446 extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
446 struct btrfs_key ins; 447 struct btrfs_key ins;
447 ins.objectid = btrfs_file_extent_disk_bytenr( 448 ins.objectid = btrfs_file_extent_disk_bytenr(
448 path->nodes[0], fi); 449 path->nodes[0], fi);
@@ -538,7 +539,8 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
538 item = btrfs_item_ptr(eb, slot, struct btrfs_file_extent_item); 539 item = btrfs_item_ptr(eb, slot, struct btrfs_file_extent_item);
539 found_type = btrfs_file_extent_type(eb, item); 540 found_type = btrfs_file_extent_type(eb, item);
540 541
541 if (found_type == BTRFS_FILE_EXTENT_REG) 542 if (found_type == BTRFS_FILE_EXTENT_REG ||
543 found_type == BTRFS_FILE_EXTENT_PREALLOC)
542 extent_end = start + btrfs_file_extent_num_bytes(eb, item); 544 extent_end = start + btrfs_file_extent_num_bytes(eb, item);
543 else if (found_type == BTRFS_FILE_EXTENT_INLINE) { 545 else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
544 size = btrfs_file_extent_inline_len(eb, item); 546 size = btrfs_file_extent_inline_len(eb, item);
@@ -562,7 +564,9 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
562 ret = btrfs_lookup_file_extent(trans, root, path, inode->i_ino, 564 ret = btrfs_lookup_file_extent(trans, root, path, inode->i_ino,
563 start, 0); 565 start, 0);
564 566
565 if (ret == 0 && found_type == BTRFS_FILE_EXTENT_REG) { 567 if (ret == 0 &&
568 (found_type == BTRFS_FILE_EXTENT_REG ||
569 found_type == BTRFS_FILE_EXTENT_PREALLOC)) {
566 struct btrfs_file_extent_item cmp1; 570 struct btrfs_file_extent_item cmp1;
567 struct btrfs_file_extent_item cmp2; 571 struct btrfs_file_extent_item cmp2;
568 struct btrfs_file_extent_item *existing; 572 struct btrfs_file_extent_item *existing;
@@ -2522,7 +2526,8 @@ static noinline int copy_items(struct btrfs_trans_handle *trans,
2522 struct btrfs_file_extent_item); 2526 struct btrfs_file_extent_item);
2523 2527
2524 found_type = btrfs_file_extent_type(src, extent); 2528 found_type = btrfs_file_extent_type(src, extent);
2525 if (found_type == BTRFS_FILE_EXTENT_REG) { 2529 if (found_type == BTRFS_FILE_EXTENT_REG ||
2530 found_type == BTRFS_FILE_EXTENT_PREALLOC) {
2526 u64 ds = btrfs_file_extent_disk_bytenr(src, 2531 u64 ds = btrfs_file_extent_disk_bytenr(src,
2527 extent); 2532 extent);
2528 u64 dl = btrfs_file_extent_disk_num_bytes(src, 2533 u64 dl = btrfs_file_extent_disk_num_bytes(src,
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-06 10:43:56 -0500