mirror of https://gitee.com/openkylin/linux.git
Merge branch 'integration-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/fdmanana/linux into for-linus-4.5
This commit is contained in:
Chris Mason
commit
43d871f029
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@ -1406,6 +1406,7 @@ char *btrfs_ref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
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read_extent_buffer(eb, dest + bytes_left,
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name_off, name_len);
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if (eb != eb_in) {
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if (!path->skip_locking)
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btrfs_tree_read_unlock_blocking(eb);
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free_extent_buffer(eb);
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}
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@ -1426,9 +1427,10 @@ char *btrfs_ref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
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eb = path->nodes[0];
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/* make sure we can use eb after releasing the path */
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if (eb != eb_in) {
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atomic_inc(&eb->refs);
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btrfs_tree_read_lock(eb);
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if (!path->skip_locking)
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btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK);
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path->nodes[0] = NULL;
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path->locks[0] = 0;
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}
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btrfs_release_path(path);
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iref = btrfs_item_ptr(eb, slot, struct btrfs_inode_ref);
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@ -637,10 +637,6 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
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faili = nr_pages - 1;
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cb->nr_pages = nr_pages;
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/* In the parent-locked case, we only locked the range we are
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* interested in. In all other cases, we can opportunistically
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* cache decompressed data that goes beyond the requested range. */
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if (!(bio_flags & EXTENT_BIO_PARENT_LOCKED))
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add_ra_bio_pages(inode, em_start + em_len, cb);
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/* include any pages we added in add_ra-bio_pages */
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@ -2897,12 +2897,11 @@ static int __do_readpage(struct extent_io_tree *tree,
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struct block_device *bdev;
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int ret;
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int nr = 0;
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int parent_locked = *bio_flags & EXTENT_BIO_PARENT_LOCKED;
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size_t pg_offset = 0;
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size_t iosize;
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size_t disk_io_size;
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size_t blocksize = inode->i_sb->s_blocksize;
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unsigned long this_bio_flag = *bio_flags & EXTENT_BIO_PARENT_LOCKED;
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unsigned long this_bio_flag = 0;
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set_page_extent_mapped(page);
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@ -2942,7 +2941,6 @@ static int __do_readpage(struct extent_io_tree *tree,
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kunmap_atomic(userpage);
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set_extent_uptodate(tree, cur, cur + iosize - 1,
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&cached, GFP_NOFS);
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if (!parent_locked)
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unlock_extent_cached(tree, cur,
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cur + iosize - 1,
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&cached, GFP_NOFS);
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@ -2952,7 +2950,6 @@ static int __do_readpage(struct extent_io_tree *tree,
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end - cur + 1, get_extent, em_cached);
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if (IS_ERR_OR_NULL(em)) {
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SetPageError(page);
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if (!parent_locked)
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unlock_extent(tree, cur, end);
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break;
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}
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@ -3038,9 +3035,6 @@ static int __do_readpage(struct extent_io_tree *tree,
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set_extent_uptodate(tree, cur, cur + iosize - 1,
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&cached, GFP_NOFS);
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if (parent_locked)
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free_extent_state(cached);
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else
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unlock_extent_cached(tree, cur,
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cur + iosize - 1,
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&cached, GFP_NOFS);
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@ -3052,7 +3046,6 @@ static int __do_readpage(struct extent_io_tree *tree,
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if (test_range_bit(tree, cur, cur_end,
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EXTENT_UPTODATE, 1, NULL)) {
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check_page_uptodate(tree, page);
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if (!parent_locked)
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unlock_extent(tree, cur, cur + iosize - 1);
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cur = cur + iosize;
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pg_offset += iosize;
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@ -3063,7 +3056,6 @@ static int __do_readpage(struct extent_io_tree *tree,
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*/
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if (block_start == EXTENT_MAP_INLINE) {
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SetPageError(page);
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if (!parent_locked)
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unlock_extent(tree, cur, cur + iosize - 1);
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cur = cur + iosize;
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pg_offset += iosize;
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@ -3083,7 +3075,6 @@ static int __do_readpage(struct extent_io_tree *tree,
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*bio_flags = this_bio_flag;
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} else {
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SetPageError(page);
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if (!parent_locked)
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unlock_extent(tree, cur, cur + iosize - 1);
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}
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cur = cur + iosize;
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@ -3213,20 +3204,6 @@ int extent_read_full_page(struct extent_io_tree *tree, struct page *page,
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return ret;
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}
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int extent_read_full_page_nolock(struct extent_io_tree *tree, struct page *page,
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get_extent_t *get_extent, int mirror_num)
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{
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struct bio *bio = NULL;
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unsigned long bio_flags = EXTENT_BIO_PARENT_LOCKED;
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int ret;
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ret = __do_readpage(tree, page, get_extent, NULL, &bio, mirror_num,
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&bio_flags, READ, NULL);
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if (bio)
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ret = submit_one_bio(READ, bio, mirror_num, bio_flags);
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return ret;
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}
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static noinline void update_nr_written(struct page *page,
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struct writeback_control *wbc,
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unsigned long nr_written)
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@ -29,7 +29,6 @@
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*/
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#define EXTENT_BIO_COMPRESSED 1
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#define EXTENT_BIO_TREE_LOG 2
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#define EXTENT_BIO_PARENT_LOCKED 4
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#define EXTENT_BIO_FLAG_SHIFT 16
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/* these are bit numbers for test/set bit */
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@ -210,8 +209,6 @@ static inline int lock_extent(struct extent_io_tree *tree, u64 start, u64 end)
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int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
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int extent_read_full_page(struct extent_io_tree *tree, struct page *page,
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get_extent_t *get_extent, int mirror_num);
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int extent_read_full_page_nolock(struct extent_io_tree *tree, struct page *page,
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get_extent_t *get_extent, int mirror_num);
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int __init extent_io_init(void);
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void extent_io_exit(void);
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119
fs/btrfs/ioctl.c
119
fs/btrfs/ioctl.c
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@ -2794,24 +2794,29 @@ static long btrfs_ioctl_dev_info(struct btrfs_root *root, void __user *arg)
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static struct page *extent_same_get_page(struct inode *inode, pgoff_t index)
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{
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struct page *page;
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struct extent_io_tree *tree = &BTRFS_I(inode)->io_tree;
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page = grab_cache_page(inode->i_mapping, index);
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if (!page)
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return NULL;
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return ERR_PTR(-ENOMEM);
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if (!PageUptodate(page)) {
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if (extent_read_full_page_nolock(tree, page, btrfs_get_extent,
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0))
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return NULL;
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int ret;
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ret = btrfs_readpage(NULL, page);
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if (ret)
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return ERR_PTR(ret);
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lock_page(page);
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if (!PageUptodate(page)) {
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unlock_page(page);
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page_cache_release(page);
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return NULL;
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}
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return ERR_PTR(-EIO);
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}
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if (page->mapping != inode->i_mapping) {
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unlock_page(page);
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page_cache_release(page);
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return ERR_PTR(-EAGAIN);
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}
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}
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return page;
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}
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@ -2823,17 +2828,31 @@ static int gather_extent_pages(struct inode *inode, struct page **pages,
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pgoff_t index = off >> PAGE_CACHE_SHIFT;
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for (i = 0; i < num_pages; i++) {
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again:
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pages[i] = extent_same_get_page(inode, index + i);
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if (!pages[i])
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return -ENOMEM;
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if (IS_ERR(pages[i])) {
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int err = PTR_ERR(pages[i]);
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if (err == -EAGAIN)
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goto again;
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pages[i] = NULL;
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return err;
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}
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}
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return 0;
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}
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static inline void lock_extent_range(struct inode *inode, u64 off, u64 len)
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static int lock_extent_range(struct inode *inode, u64 off, u64 len,
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bool retry_range_locking)
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{
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/* do any pending delalloc/csum calc on src, one way or
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another, and lock file content */
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/*
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* Do any pending delalloc/csum calculations on inode, one way or
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* another, and lock file content.
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* The locking order is:
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*
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* 1) pages
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* 2) range in the inode's io tree
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*/
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while (1) {
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struct btrfs_ordered_extent *ordered;
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lock_extent(&BTRFS_I(inode)->io_tree, off, off + len - 1);
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@ -2851,8 +2870,11 @@ static inline void lock_extent_range(struct inode *inode, u64 off, u64 len)
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unlock_extent(&BTRFS_I(inode)->io_tree, off, off + len - 1);
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if (ordered)
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btrfs_put_ordered_extent(ordered);
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if (!retry_range_locking)
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return -EAGAIN;
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btrfs_wait_ordered_range(inode, off, len);
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}
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return 0;
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}
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static void btrfs_double_inode_unlock(struct inode *inode1, struct inode *inode2)
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@ -2877,15 +2899,24 @@ static void btrfs_double_extent_unlock(struct inode *inode1, u64 loff1,
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unlock_extent(&BTRFS_I(inode2)->io_tree, loff2, loff2 + len - 1);
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}
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static void btrfs_double_extent_lock(struct inode *inode1, u64 loff1,
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struct inode *inode2, u64 loff2, u64 len)
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static int btrfs_double_extent_lock(struct inode *inode1, u64 loff1,
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struct inode *inode2, u64 loff2, u64 len,
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bool retry_range_locking)
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{
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int ret;
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if (inode1 < inode2) {
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swap(inode1, inode2);
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swap(loff1, loff2);
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}
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lock_extent_range(inode1, loff1, len);
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lock_extent_range(inode2, loff2, len);
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ret = lock_extent_range(inode1, loff1, len, retry_range_locking);
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if (ret)
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return ret;
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ret = lock_extent_range(inode2, loff2, len, retry_range_locking);
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if (ret)
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unlock_extent(&BTRFS_I(inode1)->io_tree, loff1,
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loff1 + len - 1);
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return ret;
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}
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struct cmp_pages {
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@ -2901,12 +2932,16 @@ static void btrfs_cmp_data_free(struct cmp_pages *cmp)
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for (i = 0; i < cmp->num_pages; i++) {
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pg = cmp->src_pages[i];
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if (pg)
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if (pg) {
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unlock_page(pg);
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page_cache_release(pg);
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}
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pg = cmp->dst_pages[i];
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if (pg)
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if (pg) {
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unlock_page(pg);
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page_cache_release(pg);
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}
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}
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kfree(cmp->src_pages);
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kfree(cmp->dst_pages);
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}
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@ -2966,6 +3001,8 @@ static int btrfs_cmp_data(struct inode *src, u64 loff, struct inode *dst,
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src_page = cmp->src_pages[i];
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dst_page = cmp->dst_pages[i];
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ASSERT(PageLocked(src_page));
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ASSERT(PageLocked(dst_page));
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addr = kmap_atomic(src_page);
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dst_addr = kmap_atomic(dst_page);
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@ -3078,14 +3115,46 @@ static int btrfs_extent_same(struct inode *src, u64 loff, u64 olen,
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goto out_unlock;
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}
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again:
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ret = btrfs_cmp_data_prepare(src, loff, dst, dst_loff, olen, &cmp);
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if (ret)
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goto out_unlock;
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if (same_inode)
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lock_extent_range(src, same_lock_start, same_lock_len);
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ret = lock_extent_range(src, same_lock_start, same_lock_len,
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false);
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else
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btrfs_double_extent_lock(src, loff, dst, dst_loff, len);
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ret = btrfs_double_extent_lock(src, loff, dst, dst_loff, len,
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false);
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/*
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* If one of the inodes has dirty pages in the respective range or
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* ordered extents, we need to flush dellaloc and wait for all ordered
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* extents in the range. We must unlock the pages and the ranges in the
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* io trees to avoid deadlocks when flushing delalloc (requires locking
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* pages) and when waiting for ordered extents to complete (they require
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* range locking).
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*/
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if (ret == -EAGAIN) {
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/*
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* Ranges in the io trees already unlocked. Now unlock all
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* pages before waiting for all IO to complete.
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*/
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btrfs_cmp_data_free(&cmp);
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if (same_inode) {
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btrfs_wait_ordered_range(src, same_lock_start,
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same_lock_len);
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} else {
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btrfs_wait_ordered_range(src, loff, len);
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btrfs_wait_ordered_range(dst, dst_loff, len);
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}
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goto again;
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}
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ASSERT(ret == 0);
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if (WARN_ON(ret)) {
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/* ranges in the io trees already unlocked */
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btrfs_cmp_data_free(&cmp);
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return ret;
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}
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/* pass original length for comparison so we stay within i_size */
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ret = btrfs_cmp_data(src, loff, dst, dst_loff, olen, &cmp);
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@ -3907,9 +3976,15 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
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u64 lock_start = min_t(u64, off, destoff);
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u64 lock_len = max_t(u64, off, destoff) + len - lock_start;
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lock_extent_range(src, lock_start, lock_len);
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ret = lock_extent_range(src, lock_start, lock_len, true);
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} else {
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btrfs_double_extent_lock(src, off, inode, destoff, len);
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ret = btrfs_double_extent_lock(src, off, inode, destoff, len,
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true);
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}
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ASSERT(ret == 0);
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if (WARN_ON(ret)) {
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/* ranges in the io trees already unlocked */
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goto out_unlock;
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}
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ret = btrfs_clone(src, inode, off, olen, len, destoff, 0);
|
||||
|
|
|
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