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authorJosef Bacik <josef@toxicpanda.com>2022-10-26 22:08:23 +0300
committerDavid Sterba <dsterba@suse.com>2022-12-05 20:00:45 +0300
commit6e3df18ba7e8e68015dd66bcab326a4b7aaed085 (patch)
tree8ad75a04565d94dcb67f44d14ad8911de8bc1904 /fs/btrfs/file.c
parent778dd695dd4d5a21eff07bb1570b570da69dfbd9 (diff)
downloadlinux-6e3df18ba7e8e68015dd66bcab326a4b7aaed085.tar.xz
btrfs: move the auto defrag code to defrag.c
This currently exists in file.c, move it to the more natural location in defrag.c. Signed-off-by: Josef Bacik <josef@toxicpanda.com> [ reformat comments ] Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/file.c')
-rw-r--r--fs/btrfs/file.c340
1 files changed, 0 insertions, 340 deletions
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index bad676d2e23f..8500472aa6ef 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -34,329 +34,6 @@
#include "accessors.h"
#include "extent-tree.h"
-static struct kmem_cache *btrfs_inode_defrag_cachep;
-/*
- * when auto defrag is enabled we
- * queue up these defrag structs to remember which
- * inodes need defragging passes
- */
-struct inode_defrag {
- struct rb_node rb_node;
- /* objectid */
- u64 ino;
- /*
- * transid where the defrag was added, we search for
- * extents newer than this
- */
- u64 transid;
-
- /* root objectid */
- u64 root;
-
- /*
- * The extent size threshold for autodefrag.
- *
- * This value is different for compressed/non-compressed extents,
- * thus needs to be passed from higher layer.
- * (aka, inode_should_defrag())
- */
- u32 extent_thresh;
-};
-
-static int __compare_inode_defrag(struct inode_defrag *defrag1,
- struct inode_defrag *defrag2)
-{
- if (defrag1->root > defrag2->root)
- return 1;
- else if (defrag1->root < defrag2->root)
- return -1;
- else if (defrag1->ino > defrag2->ino)
- return 1;
- else if (defrag1->ino < defrag2->ino)
- return -1;
- else
- return 0;
-}
-
-/* pop a record for an inode into the defrag tree. The lock
- * must be held already
- *
- * If you're inserting a record for an older transid than an
- * existing record, the transid already in the tree is lowered
- *
- * If an existing record is found the defrag item you
- * pass in is freed
- */
-static int __btrfs_add_inode_defrag(struct btrfs_inode *inode,
- struct inode_defrag *defrag)
-{
- struct btrfs_fs_info *fs_info = inode->root->fs_info;
- struct inode_defrag *entry;
- struct rb_node **p;
- struct rb_node *parent = NULL;
- int ret;
-
- p = &fs_info->defrag_inodes.rb_node;
- while (*p) {
- parent = *p;
- entry = rb_entry(parent, struct inode_defrag, rb_node);
-
- ret = __compare_inode_defrag(defrag, entry);
- if (ret < 0)
- p = &parent->rb_left;
- else if (ret > 0)
- p = &parent->rb_right;
- else {
- /* if we're reinserting an entry for
- * an old defrag run, make sure to
- * lower the transid of our existing record
- */
- if (defrag->transid < entry->transid)
- entry->transid = defrag->transid;
- entry->extent_thresh = min(defrag->extent_thresh,
- entry->extent_thresh);
- return -EEXIST;
- }
- }
- set_bit(BTRFS_INODE_IN_DEFRAG, &inode->runtime_flags);
- rb_link_node(&defrag->rb_node, parent, p);
- rb_insert_color(&defrag->rb_node, &fs_info->defrag_inodes);
- return 0;
-}
-
-static inline int __need_auto_defrag(struct btrfs_fs_info *fs_info)
-{
- if (!btrfs_test_opt(fs_info, AUTO_DEFRAG))
- return 0;
-
- if (btrfs_fs_closing(fs_info))
- return 0;
-
- return 1;
-}
-
-/*
- * insert a defrag record for this inode if auto defrag is
- * enabled
- */
-int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
- struct btrfs_inode *inode, u32 extent_thresh)
-{
- struct btrfs_root *root = inode->root;
- struct btrfs_fs_info *fs_info = root->fs_info;
- struct inode_defrag *defrag;
- u64 transid;
- int ret;
-
- if (!__need_auto_defrag(fs_info))
- return 0;
-
- if (test_bit(BTRFS_INODE_IN_DEFRAG, &inode->runtime_flags))
- return 0;
-
- if (trans)
- transid = trans->transid;
- else
- transid = inode->root->last_trans;
-
- defrag = kmem_cache_zalloc(btrfs_inode_defrag_cachep, GFP_NOFS);
- if (!defrag)
- return -ENOMEM;
-
- defrag->ino = btrfs_ino(inode);
- defrag->transid = transid;
- defrag->root = root->root_key.objectid;
- defrag->extent_thresh = extent_thresh;
-
- spin_lock(&fs_info->defrag_inodes_lock);
- if (!test_bit(BTRFS_INODE_IN_DEFRAG, &inode->runtime_flags)) {
- /*
- * If we set IN_DEFRAG flag and evict the inode from memory,
- * and then re-read this inode, this new inode doesn't have
- * IN_DEFRAG flag. At the case, we may find the existed defrag.
- */
- ret = __btrfs_add_inode_defrag(inode, defrag);
- if (ret)
- kmem_cache_free(btrfs_inode_defrag_cachep, defrag);
- } else {
- kmem_cache_free(btrfs_inode_defrag_cachep, defrag);
- }
- spin_unlock(&fs_info->defrag_inodes_lock);
- return 0;
-}
-
-/*
- * pick the defragable inode that we want, if it doesn't exist, we will get
- * the next one.
- */
-static struct inode_defrag *
-btrfs_pick_defrag_inode(struct btrfs_fs_info *fs_info, u64 root, u64 ino)
-{
- struct inode_defrag *entry = NULL;
- struct inode_defrag tmp;
- struct rb_node *p;
- struct rb_node *parent = NULL;
- int ret;
-
- tmp.ino = ino;
- tmp.root = root;
-
- spin_lock(&fs_info->defrag_inodes_lock);
- p = fs_info->defrag_inodes.rb_node;
- while (p) {
- parent = p;
- entry = rb_entry(parent, struct inode_defrag, rb_node);
-
- ret = __compare_inode_defrag(&tmp, entry);
- if (ret < 0)
- p = parent->rb_left;
- else if (ret > 0)
- p = parent->rb_right;
- else
- goto out;
- }
-
- if (parent && __compare_inode_defrag(&tmp, entry) > 0) {
- parent = rb_next(parent);
- if (parent)
- entry = rb_entry(parent, struct inode_defrag, rb_node);
- else
- entry = NULL;
- }
-out:
- if (entry)
- rb_erase(parent, &fs_info->defrag_inodes);
- spin_unlock(&fs_info->defrag_inodes_lock);
- return entry;
-}
-
-void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info)
-{
- struct inode_defrag *defrag;
- struct rb_node *node;
-
- spin_lock(&fs_info->defrag_inodes_lock);
- node = rb_first(&fs_info->defrag_inodes);
- while (node) {
- rb_erase(node, &fs_info->defrag_inodes);
- defrag = rb_entry(node, struct inode_defrag, rb_node);
- kmem_cache_free(btrfs_inode_defrag_cachep, defrag);
-
- cond_resched_lock(&fs_info->defrag_inodes_lock);
-
- node = rb_first(&fs_info->defrag_inodes);
- }
- spin_unlock(&fs_info->defrag_inodes_lock);
-}
-
-#define BTRFS_DEFRAG_BATCH 1024
-
-static int __btrfs_run_defrag_inode(struct btrfs_fs_info *fs_info,
- struct inode_defrag *defrag)
-{
- struct btrfs_root *inode_root;
- struct inode *inode;
- struct btrfs_ioctl_defrag_range_args range;
- int ret = 0;
- u64 cur = 0;
-
-again:
- if (test_bit(BTRFS_FS_STATE_REMOUNTING, &fs_info->fs_state))
- goto cleanup;
- if (!__need_auto_defrag(fs_info))
- goto cleanup;
-
- /* get the inode */
- inode_root = btrfs_get_fs_root(fs_info, defrag->root, true);
- if (IS_ERR(inode_root)) {
- ret = PTR_ERR(inode_root);
- goto cleanup;
- }
-
- inode = btrfs_iget(fs_info->sb, defrag->ino, inode_root);
- btrfs_put_root(inode_root);
- if (IS_ERR(inode)) {
- ret = PTR_ERR(inode);
- goto cleanup;
- }
-
- if (cur >= i_size_read(inode)) {
- iput(inode);
- goto cleanup;
- }
-
- /* do a chunk of defrag */
- clear_bit(BTRFS_INODE_IN_DEFRAG, &BTRFS_I(inode)->runtime_flags);
- memset(&range, 0, sizeof(range));
- range.len = (u64)-1;
- range.start = cur;
- range.extent_thresh = defrag->extent_thresh;
-
- sb_start_write(fs_info->sb);
- ret = btrfs_defrag_file(inode, NULL, &range, defrag->transid,
- BTRFS_DEFRAG_BATCH);
- sb_end_write(fs_info->sb);
- iput(inode);
-
- if (ret < 0)
- goto cleanup;
-
- cur = max(cur + fs_info->sectorsize, range.start);
- goto again;
-
-cleanup:
- kmem_cache_free(btrfs_inode_defrag_cachep, defrag);
- return ret;
-}
-
-/*
- * run through the list of inodes in the FS that need
- * defragging
- */
-int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info)
-{
- struct inode_defrag *defrag;
- u64 first_ino = 0;
- u64 root_objectid = 0;
-
- atomic_inc(&fs_info->defrag_running);
- while (1) {
- /* Pause the auto defragger. */
- if (test_bit(BTRFS_FS_STATE_REMOUNTING,
- &fs_info->fs_state))
- break;
-
- if (!__need_auto_defrag(fs_info))
- break;
-
- /* find an inode to defrag */
- defrag = btrfs_pick_defrag_inode(fs_info, root_objectid,
- first_ino);
- if (!defrag) {
- if (root_objectid || first_ino) {
- root_objectid = 0;
- first_ino = 0;
- continue;
- } else {
- break;
- }
- }
-
- first_ino = defrag->ino + 1;
- root_objectid = defrag->root;
-
- __btrfs_run_defrag_inode(fs_info, defrag);
- }
- atomic_dec(&fs_info->defrag_running);
-
- /*
- * during unmount, we use the transaction_wait queue to
- * wait for the defragger to stop
- */
- wake_up(&fs_info->transaction_wait);
- return 0;
-}
-
/* simple helper to fault in pages and copy. This should go away
* and be replaced with calls into generic code.
*/
@@ -4153,23 +3830,6 @@ const struct file_operations btrfs_file_operations = {
.remap_file_range = btrfs_remap_file_range,
};
-void __cold btrfs_auto_defrag_exit(void)
-{
- kmem_cache_destroy(btrfs_inode_defrag_cachep);
-}
-
-int __init btrfs_auto_defrag_init(void)
-{
- btrfs_inode_defrag_cachep = kmem_cache_create("btrfs_inode_defrag",
- sizeof(struct inode_defrag), 0,
- SLAB_MEM_SPREAD,
- NULL);
- if (!btrfs_inode_defrag_cachep)
- return -ENOMEM;
-
- return 0;
-}
-
int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end)
{
int ret;