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-rw-r--r--fs/btrfs/block-group.c2
-rw-r--r--fs/btrfs/disk-io.c4
-rw-r--r--fs/btrfs/tree-log.c98
-rw-r--r--fs/btrfs/volumes.c5
-rw-r--r--fs/btrfs/zlib.c4
-rw-r--r--include/trace/events/btrfs.h11
6 files changed, 81 insertions, 43 deletions
diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c
index ebf5079096af..c0d17a369bda 100644
--- a/fs/btrfs/block-group.c
+++ b/fs/btrfs/block-group.c
@@ -4583,7 +4583,7 @@ static void check_removing_space_info(struct btrfs_space_info *space_info)
for (int i = 0; i < BTRFS_SPACE_INFO_SUB_GROUP_MAX; i++) {
if (space_info->sub_group[i]) {
check_removing_space_info(space_info->sub_group[i]);
- kfree(space_info->sub_group[i]);
+ btrfs_sysfs_remove_space_info(space_info->sub_group[i]);
space_info->sub_group[i] = NULL;
}
}
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 01f2dbb69832..1b0eb246b714 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2531,8 +2531,8 @@ int btrfs_validate_super(const struct btrfs_fs_info *fs_info,
if (mirror_num >= 0 &&
btrfs_super_bytenr(sb) != btrfs_sb_offset(mirror_num)) {
- btrfs_err(fs_info, "super offset mismatch %llu != %u",
- btrfs_super_bytenr(sb), BTRFS_SUPER_INFO_OFFSET);
+ btrfs_err(fs_info, "super offset mismatch %llu != %llu",
+ btrfs_super_bytenr(sb), btrfs_sb_offset(mirror_num));
ret = -EINVAL;
}
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index ab0d460c7139..ac871efb9763 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -4616,21 +4616,32 @@ static void fill_inode_item(struct btrfs_trans_handle *trans,
struct inode *inode, bool log_inode_only,
u64 logged_isize)
{
+ u64 gen = BTRFS_I(inode)->generation;
u64 flags;
if (log_inode_only) {
- /* set the generation to zero so the recover code
- * can tell the difference between an logging
- * just to say 'this inode exists' and a logging
- * to say 'update this inode with these values'
+ /*
+ * Set the generation to zero so the recover code can tell the
+ * difference between a logging just to say 'this inode exists'
+ * and a logging to say 'update this inode with these values'.
+ * But only if the inode was not already logged before.
+ * We access ->logged_trans directly since it was already set
+ * up in the call chain by btrfs_log_inode(), and data_race()
+ * to avoid false alerts from KCSAN and since it was set already
+ * and one can set it to 0 since that only happens on eviction
+ * and we are holding a ref on the inode.
*/
- btrfs_set_inode_generation(leaf, item, 0);
+ ASSERT(data_race(BTRFS_I(inode)->logged_trans) > 0);
+ if (data_race(BTRFS_I(inode)->logged_trans) < trans->transid)
+ gen = 0;
+
btrfs_set_inode_size(leaf, item, logged_isize);
} else {
- btrfs_set_inode_generation(leaf, item, BTRFS_I(inode)->generation);
btrfs_set_inode_size(leaf, item, inode->i_size);
}
+ btrfs_set_inode_generation(leaf, item, gen);
+
btrfs_set_inode_uid(leaf, item, i_uid_read(inode));
btrfs_set_inode_gid(leaf, item, i_gid_read(inode));
btrfs_set_inode_mode(leaf, item, inode->i_mode);
@@ -5448,42 +5459,63 @@ process:
return 0;
}
-static int logged_inode_size(struct btrfs_root *log, struct btrfs_inode *inode,
- struct btrfs_path *path, u64 *size_ret)
+static int get_inode_size_to_log(struct btrfs_trans_handle *trans,
+ struct btrfs_inode *inode,
+ struct btrfs_path *path, u64 *size_ret)
{
struct btrfs_key key;
+ struct btrfs_inode_item *item;
int ret;
key.objectid = btrfs_ino(inode);
key.type = BTRFS_INODE_ITEM_KEY;
key.offset = 0;
- ret = btrfs_search_slot(NULL, log, &key, path, 0, 0);
- if (ret < 0) {
- return ret;
- } else if (ret > 0) {
- *size_ret = 0;
- } else {
- struct btrfs_inode_item *item;
+ /*
+ * Our caller called inode_logged(), so logged_trans is up to date.
+ * Use data_race() to silence any warning from KCSAN. Once logged_trans
+ * is set, it can only be reset to 0 after inode eviction.
+ */
+ if (data_race(inode->logged_trans) == trans->transid) {
+ ret = btrfs_search_slot(NULL, inode->root->log_root, &key, path, 0, 0);
+ } else if (inode->generation < trans->transid) {
+ path->search_commit_root = true;
+ path->skip_locking = true;
+ ret = btrfs_search_slot(NULL, inode->root, &key, path, 0, 0);
+ path->search_commit_root = false;
+ path->skip_locking = false;
- item = btrfs_item_ptr(path->nodes[0], path->slots[0],
- struct btrfs_inode_item);
- *size_ret = btrfs_inode_size(path->nodes[0], item);
- /*
- * If the in-memory inode's i_size is smaller then the inode
- * size stored in the btree, return the inode's i_size, so
- * that we get a correct inode size after replaying the log
- * when before a power failure we had a shrinking truncate
- * followed by addition of a new name (rename / new hard link).
- * Otherwise return the inode size from the btree, to avoid
- * data loss when replaying a log due to previously doing a
- * write that expands the inode's size and logging a new name
- * immediately after.
- */
- if (*size_ret > inode->vfs_inode.i_size)
- *size_ret = inode->vfs_inode.i_size;
+ } else {
+ *size_ret = 0;
+ return 0;
}
+ /*
+ * If the inode was logged before or is from a past transaction, then
+ * its inode item must exist in the log root or in the commit root.
+ */
+ ASSERT(ret <= 0);
+ if (WARN_ON_ONCE(ret > 0))
+ ret = -ENOENT;
+
+ if (ret < 0)
+ return ret;
+
+ item = btrfs_item_ptr(path->nodes[0], path->slots[0],
+ struct btrfs_inode_item);
+ *size_ret = btrfs_inode_size(path->nodes[0], item);
+ /*
+ * If the in-memory inode's i_size is smaller then the inode size stored
+ * in the btree, return the inode's i_size, so that we get a correct
+ * inode size after replaying the log when before a power failure we had
+ * a shrinking truncate followed by addition of a new name (rename / new
+ * hard link). Otherwise return the inode size from the btree, to avoid
+ * data loss when replaying a log due to previously doing a write that
+ * expands the inode's size and logging a new name immediately after.
+ */
+ if (*size_ret > inode->vfs_inode.i_size)
+ *size_ret = inode->vfs_inode.i_size;
+
btrfs_release_path(path);
return 0;
}
@@ -6996,7 +7028,7 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans,
ret = drop_inode_items(trans, log, path, inode,
BTRFS_XATTR_ITEM_KEY);
} else {
- if (inode_only == LOG_INODE_EXISTS && ctx->logged_before) {
+ if (inode_only == LOG_INODE_EXISTS) {
/*
* Make sure the new inode item we write to the log has
* the same isize as the current one (if it exists).
@@ -7010,7 +7042,7 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans,
* (zeroes), as if an expanding truncate happened,
* instead of getting a file of 4Kb only.
*/
- ret = logged_inode_size(log, inode, path, &logged_isize);
+ ret = get_inode_size_to_log(trans, inode, path, &logged_isize);
if (ret)
goto out_unlock;
}
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index ab51e6ecfdef..6b8e810a35ce 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -8099,8 +8099,9 @@ int btrfs_run_dev_stats(struct btrfs_trans_handle *trans)
smp_rmb();
ret = update_dev_stat_item(trans, device);
- if (!ret)
- atomic_sub(stats_cnt, &device->dev_stats_ccnt);
+ if (ret)
+ break;
+ atomic_sub(stats_cnt, &device->dev_stats_ccnt);
}
mutex_unlock(&fs_devices->device_list_mutex);
diff --git a/fs/btrfs/zlib.c b/fs/btrfs/zlib.c
index 1b7544aa88a2..c676e715b4f8 100644
--- a/fs/btrfs/zlib.c
+++ b/fs/btrfs/zlib.c
@@ -308,7 +308,9 @@ int zlib_compress_bio(struct list_head *ws, struct compressed_bio *cb)
}
/* Queue the remaining part of the folio. */
if (workspace->strm.total_out > bio->bi_iter.bi_size) {
- u32 cur_len = offset_in_folio(out_folio, workspace->strm.total_out);
+ const u32 cur_len = workspace->strm.total_out - bio->bi_iter.bi_size;
+
+ ASSERT(cur_len <= folio_size(out_folio));
if (!bio_add_folio(bio, out_folio, cur_len, 0)) {
ret = -E2BIG;
diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
index 125bdc166bfe..0864700f76e0 100644
--- a/include/trace/events/btrfs.h
+++ b/include/trace/events/btrfs.h
@@ -769,12 +769,15 @@ TRACE_EVENT(btrfs_sync_file,
),
TP_fast_assign(
- const struct dentry *dentry = file->f_path.dentry;
- const struct inode *inode = d_inode(dentry);
+ struct dentry *dentry = file_dentry(file);
+ struct inode *inode = file_inode(file);
+ struct dentry *parent = dget_parent(dentry);
+ struct inode *parent_inode = d_inode(parent);
- TP_fast_assign_fsid(btrfs_sb(file->f_path.dentry->d_sb));
+ dput(parent);
+ TP_fast_assign_fsid(btrfs_sb(inode->i_sb));
__entry->ino = btrfs_ino(BTRFS_I(inode));
- __entry->parent = btrfs_ino(BTRFS_I(d_inode(dentry->d_parent)));
+ __entry->parent = btrfs_ino(BTRFS_I(parent_inode));
__entry->datasync = datasync;
__entry->root_objectid = btrfs_root_id(BTRFS_I(inode)->root);
),
generated by cgit v1.2.3 (git 2.46.0) at 2026-04-02 18:58:43 +0000