diff options
Diffstat (limited to 'fs/btrfs/ordered-data.c')
| -rw-r--r-- | fs/btrfs/ordered-data.c | 62 |
1 files changed, 18 insertions, 44 deletions
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c index 051c7fe551dd..cd8ecb73c05c 100644 --- a/fs/btrfs/ordered-data.c +++ b/fs/btrfs/ordered-data.c @@ -775,7 +775,6 @@ int btrfs_ordered_update_i_size(struct inode *inode, u64 offset, struct btrfs_ordered_inode_tree *tree = &BTRFS_I(inode)->ordered_tree; u64 disk_i_size; u64 new_i_size; - u64 i_size_test; u64 i_size = i_size_read(inode); struct rb_node *node; struct rb_node *prev = NULL; @@ -835,55 +834,30 @@ int btrfs_ordered_update_i_size(struct inode *inode, u64 offset, break; if (test->file_offset >= i_size) break; - if (test->file_offset >= disk_i_size) + if (test->file_offset >= disk_i_size) { + /* + * we don't update disk_i_size now, so record this + * undealt i_size. Or we will not know the real + * i_size. + */ + if (test->outstanding_isize < offset) + test->outstanding_isize = offset; + if (ordered && + ordered->outstanding_isize > + test->outstanding_isize) + test->outstanding_isize = + ordered->outstanding_isize; goto out; - } - new_i_size = min_t(u64, offset, i_size); - - /* - * at this point, we know we can safely update i_size to at least - * the offset from this ordered extent. But, we need to - * walk forward and see if ios from higher up in the file have - * finished. - */ - if (ordered) { - node = rb_next(&ordered->rb_node); - } else { - if (prev) - node = rb_next(prev); - else - node = rb_first(&tree->tree); - } - - /* - * We are looking for an area between our current extent and the next - * ordered extent to update the i_size to. There are 3 cases here - * - * 1) We don't actually have anything and we can update to i_size. - * 2) We have stuff but they already did their i_size update so again we - * can just update to i_size. - * 3) We have an outstanding ordered extent so the most we can update - * our disk_i_size to is the start of the next offset. - */ - i_size_test = i_size; - for (; node; node = rb_next(node)) { - test = rb_entry(node, struct btrfs_ordered_extent, rb_node); - - if (test_bit(BTRFS_ORDERED_UPDATED_ISIZE, &test->flags)) - continue; - if (test->file_offset > offset) { - i_size_test = test->file_offset; - break; } } + new_i_size = min_t(u64, offset, i_size); /* - * i_size_test is the end of a region after this ordered - * extent where there are no ordered extents, we can safely set - * disk_i_size to this. + * Some ordered extents may completed before the current one, and + * we hold the real i_size in ->outstanding_isize. */ - if (i_size_test > offset) - new_i_size = min_t(u64, i_size_test, i_size); + if (ordered && ordered->outstanding_isize > new_i_size) + new_i_size = min_t(u64, ordered->outstanding_isize, i_size); BTRFS_I(inode)->disk_i_size = new_i_size; ret = 0; out: |