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OpenCloudOS-Kernel
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Merge git://git.jan-o-sch.net/btrfs-unstable into for-linus 

Conflicts:
	fs/btrfs/transaction.c

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2012-03-28 20:33:40 -04:00
parent 1c691b330a 7a3ae2f8c8
commit 98961a7e43
5 changed files with 73 additions and 53 deletions
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111
fs/btrfs/backref.c
View File

@ -116,6 +116,7 @@ add_parent:
* to a logical address * to a logical address
*/ */
static int __resolve_indirect_ref(struct btrfs_fs_info *fs_info, static int __resolve_indirect_ref(struct btrfs_fs_info *fs_info,
int search_commit_root,
struct __prelim_ref *ref, struct __prelim_ref *ref,
struct ulist *parents) struct ulist *parents)
{ {
@ -131,6 +132,7 @@ static int __resolve_indirect_ref(struct btrfs_fs_info *fs_info,
path = btrfs_alloc_path(); path = btrfs_alloc_path();
if (!path) if (!path)
return -ENOMEM; return -ENOMEM;
path->search_commit_root = !!search_commit_root;
root_key.objectid = ref->root_id; root_key.objectid = ref->root_id;
root_key.type = BTRFS_ROOT_ITEM_KEY; root_key.type = BTRFS_ROOT_ITEM_KEY;
@ -188,6 +190,7 @@ out:
* resolve all indirect backrefs from the list * resolve all indirect backrefs from the list
*/ */
static int __resolve_indirect_refs(struct btrfs_fs_info *fs_info, static int __resolve_indirect_refs(struct btrfs_fs_info *fs_info,
int search_commit_root,
struct list_head *head) struct list_head *head)
{ {
int err; int err;
@ -212,7 +215,8 @@ static int __resolve_indirect_refs(struct btrfs_fs_info *fs_info,
continue; continue;
if (ref->count == 0) if (ref->count == 0)
continue; continue;
err = __resolve_indirect_ref(fs_info, ref, parents); err = __resolve_indirect_ref(fs_info, search_commit_root,
ref, parents);
if (err) { if (err) {
if (ret == 0) if (ret == 0)
ret = err; ret = err;
@ -586,6 +590,7 @@ static int find_parent_nodes(struct btrfs_trans_handle *trans,
struct btrfs_delayed_ref_head *head; struct btrfs_delayed_ref_head *head;
int info_level = 0; int info_level = 0;
int ret; int ret;
int search_commit_root = (trans == BTRFS_BACKREF_SEARCH_COMMIT_ROOT);
struct list_head prefs_delayed; struct list_head prefs_delayed;
struct list_head prefs; struct list_head prefs;
struct __prelim_ref *ref; struct __prelim_ref *ref;
@ -600,6 +605,7 @@ static int find_parent_nodes(struct btrfs_trans_handle *trans,
path = btrfs_alloc_path(); path = btrfs_alloc_path();
if (!path) if (!path)
return -ENOMEM; return -ENOMEM;
path->search_commit_root = !!search_commit_root;
/* /*
* grab both a lock on the path and a lock on the delayed ref head. * grab both a lock on the path and a lock on the delayed ref head.
@ -614,35 +620,39 @@ again:
goto out; goto out;
BUG_ON(ret == 0); BUG_ON(ret == 0);
/* if (trans != BTRFS_BACKREF_SEARCH_COMMIT_ROOT) {
* look if there are updates for this ref queued and lock the head /*
*/ * look if there are updates for this ref queued and lock the
delayed_refs = &trans->transaction->delayed_refs; * head
spin_lock(&delayed_refs->lock); */
head = btrfs_find_delayed_ref_head(trans, bytenr); delayed_refs = &trans->transaction->delayed_refs;
if (head) { spin_lock(&delayed_refs->lock);
if (!mutex_trylock(&head->mutex)) { head = btrfs_find_delayed_ref_head(trans, bytenr);
atomic_inc(&head->node.refs); if (head) {
spin_unlock(&delayed_refs->lock); if (!mutex_trylock(&head->mutex)) {
atomic_inc(&head->node.refs);
spin_unlock(&delayed_refs->lock);
btrfs_release_path(path); btrfs_release_path(path);
/* /*
* Mutex was contended, block until it's * Mutex was contended, block until it's
* released and try again * released and try again
*/ */
mutex_lock(&head->mutex); mutex_lock(&head->mutex);
mutex_unlock(&head->mutex); mutex_unlock(&head->mutex);
btrfs_put_delayed_ref(&head->node); btrfs_put_delayed_ref(&head->node);
goto again; goto again;
} }
ret = __add_delayed_refs(head, seq, &info_key, &prefs_delayed); ret = __add_delayed_refs(head, seq, &info_key,
if (ret) { &prefs_delayed);
spin_unlock(&delayed_refs->lock); if (ret) {
goto out; spin_unlock(&delayed_refs->lock);
goto out;
}
} }
spin_unlock(&delayed_refs->lock);
} }
spin_unlock(&delayed_refs->lock);
if (path->slots[0]) { if (path->slots[0]) {
struct extent_buffer *leaf; struct extent_buffer *leaf;
@ -679,7 +689,7 @@ again:
if (ret) if (ret)
goto out; goto out;
ret = __resolve_indirect_refs(fs_info, &prefs); ret = __resolve_indirect_refs(fs_info, search_commit_root, &prefs);
if (ret) if (ret)
goto out; goto out;
@ -1074,8 +1084,7 @@ int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb,
return 0; return 0;
} }
static int iterate_leaf_refs(struct btrfs_fs_info *fs_info, static int iterate_leaf_refs(struct btrfs_fs_info *fs_info, u64 logical,
struct btrfs_path *path, u64 logical,
u64 orig_extent_item_objectid, u64 orig_extent_item_objectid,
u64 extent_item_pos, u64 root, u64 extent_item_pos, u64 root,
iterate_extent_inodes_t *iterate, void *ctx) iterate_extent_inodes_t *iterate, void *ctx)
@ -1143,35 +1152,38 @@ static int iterate_leaf_refs(struct btrfs_fs_info *fs_info,
* calls iterate() for every inode that references the extent identified by * calls iterate() for every inode that references the extent identified by
* the given parameters. * the given parameters.
* when the iterator function returns a non-zero value, iteration stops. * when the iterator function returns a non-zero value, iteration stops.
* path is guaranteed to be in released state when iterate() is called.
*/ */
int iterate_extent_inodes(struct btrfs_fs_info *fs_info, int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
struct btrfs_path *path,
u64 extent_item_objectid, u64 extent_item_pos, u64 extent_item_objectid, u64 extent_item_pos,
int search_commit_root,
iterate_extent_inodes_t *iterate, void *ctx) iterate_extent_inodes_t *iterate, void *ctx)
{ {
int ret; int ret;
struct list_head data_refs = LIST_HEAD_INIT(data_refs); struct list_head data_refs = LIST_HEAD_INIT(data_refs);
struct list_head shared_refs = LIST_HEAD_INIT(shared_refs); struct list_head shared_refs = LIST_HEAD_INIT(shared_refs);
struct btrfs_trans_handle *trans; struct btrfs_trans_handle *trans;
struct ulist *refs; struct ulist *refs = NULL;
struct ulist *roots; struct ulist *roots = NULL;
struct ulist_node *ref_node = NULL; struct ulist_node *ref_node = NULL;
struct ulist_node *root_node = NULL; struct ulist_node *root_node = NULL;
struct seq_list seq_elem; struct seq_list seq_elem;
struct btrfs_delayed_ref_root *delayed_refs; struct btrfs_delayed_ref_root *delayed_refs = NULL;
trans = btrfs_join_transaction(fs_info->extent_root);
if (IS_ERR(trans))
return PTR_ERR(trans);
pr_debug("resolving all inodes for extent %llu\n", pr_debug("resolving all inodes for extent %llu\n",
extent_item_objectid); extent_item_objectid);
delayed_refs = &trans->transaction->delayed_refs; if (search_commit_root) {
spin_lock(&delayed_refs->lock); trans = BTRFS_BACKREF_SEARCH_COMMIT_ROOT;
btrfs_get_delayed_seq(delayed_refs, &seq_elem); } else {
spin_unlock(&delayed_refs->lock); trans = btrfs_join_transaction(fs_info->extent_root);
if (IS_ERR(trans))
return PTR_ERR(trans);
delayed_refs = &trans->transaction->delayed_refs;
spin_lock(&delayed_refs->lock);
btrfs_get_delayed_seq(delayed_refs, &seq_elem);
spin_unlock(&delayed_refs->lock);
}
ret = btrfs_find_all_leafs(trans, fs_info, extent_item_objectid, ret = btrfs_find_all_leafs(trans, fs_info, extent_item_objectid,
extent_item_pos, seq_elem.seq, extent_item_pos, seq_elem.seq,
@ -1188,7 +1200,7 @@ int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
while (!ret && (root_node = ulist_next(roots, root_node))) { while (!ret && (root_node = ulist_next(roots, root_node))) {
pr_debug("root %llu references leaf %llu\n", pr_debug("root %llu references leaf %llu\n",
root_node->val, ref_node->val); root_node->val, ref_node->val);
ret = iterate_leaf_refs(fs_info, path, ref_node->val, ret = iterate_leaf_refs(fs_info, ref_node->val,
extent_item_objectid, extent_item_objectid,
extent_item_pos, root_node->val, extent_item_pos, root_node->val,
iterate, ctx); iterate, ctx);
@ -1198,8 +1210,11 @@ int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
ulist_free(refs); ulist_free(refs);
ulist_free(roots); ulist_free(roots);
out: out:
btrfs_put_delayed_seq(delayed_refs, &seq_elem); if (!search_commit_root) {
btrfs_end_transaction(trans, fs_info->extent_root); btrfs_put_delayed_seq(delayed_refs, &seq_elem);
btrfs_end_transaction(trans, fs_info->extent_root);
}
return ret; return ret;
} }
@ -1210,6 +1225,7 @@ int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info,
int ret; int ret;
u64 extent_item_pos; u64 extent_item_pos;
struct btrfs_key found_key; struct btrfs_key found_key;
int search_commit_root = path->search_commit_root;
ret = extent_from_logical(fs_info, logical, path, ret = extent_from_logical(fs_info, logical, path,
&found_key); &found_key);
@ -1220,8 +1236,9 @@ int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info,
return ret; return ret;
extent_item_pos = logical - found_key.objectid; extent_item_pos = logical - found_key.objectid;
ret = iterate_extent_inodes(fs_info, path, found_key.objectid, ret = iterate_extent_inodes(fs_info, found_key.objectid,
extent_item_pos, iterate, ctx); extent_item_pos, search_commit_root,
iterate, ctx);
return ret; return ret;
} }

5
fs/btrfs/backref.h
View File

@ -22,6 +22,8 @@
#include "ioctl.h" #include "ioctl.h"
#include "ulist.h" #include "ulist.h"
#define BTRFS_BACKREF_SEARCH_COMMIT_ROOT ((struct btrfs_trans_handle *)0)
struct inode_fs_paths { struct inode_fs_paths {
struct btrfs_path *btrfs_path; struct btrfs_path *btrfs_path;
struct btrfs_root *fs_root; struct btrfs_root *fs_root;
@ -44,9 +46,8 @@ int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb,
u64 *out_root, u8 *out_level); u64 *out_root, u8 *out_level);
int iterate_extent_inodes(struct btrfs_fs_info *fs_info, int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
struct btrfs_path *path,
u64 extent_item_objectid, u64 extent_item_objectid,
u64 extent_offset, u64 extent_offset, int search_commit_root,
iterate_extent_inodes_t *iterate, void *ctx); iterate_extent_inodes_t *iterate, void *ctx);
int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info, int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info,

4
fs/btrfs/ioctl.c
View File

@ -3121,8 +3121,8 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root,
goto out; goto out;
extent_item_pos = loi->logical - key.objectid; extent_item_pos = loi->logical - key.objectid;
ret = iterate_extent_inodes(root->fs_info, path, key.objectid, ret = iterate_extent_inodes(root->fs_info, key.objectid,
extent_item_pos, build_ino_list, extent_item_pos, 0, build_ino_list,
inodes); inodes);
if (ret < 0) if (ret < 0)

4
fs/btrfs/scrub.c
View File

@ -400,8 +400,8 @@ static void scrub_print_warning(const char *errstr, struct scrub_block *sblock)
} while (ret != 1); } while (ret != 1);
} else { } else {
swarn.path = path; swarn.path = path;
iterate_extent_inodes(fs_info, path, found_key.objectid, iterate_extent_inodes(fs_info, found_key.objectid,
extent_item_pos, extent_item_pos, 1,
scrub_print_warning_inode, &swarn); scrub_print_warning_inode, &swarn);
} }

2
fs/btrfs/super.c
View File

@ -1541,6 +1541,8 @@ static int __init init_btrfs_fs(void)
if (err) if (err)
goto unregister_ioctl; goto unregister_ioctl;
btrfs_init_lockdep();
printk(KERN_INFO "%s loaded\n", BTRFS_BUILD_VERSION); printk(KERN_INFO "%s loaded\n", BTRFS_BUILD_VERSION);
return 0; return 0;