diff options
author | Kent Overstreet <kent.overstreet@linux.dev> | 2024-04-10 13:18:22 -0400 |
---|---|---|
committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-04-13 14:33:16 -0400 |
commit | 430e828d13992cfc011f46836f1580d6539a1f3d (patch) | |
tree | 98920d954fa4e2cde7dd21fe2ab17a938e4424f4 | |
parent | 667f9515b5bb062c4241c946b159f42385fa98e6 (diff) |
bcachefs: bch2_dir_emit() - drop_locks_do() conversion
Add a new helper that calls dir_emit() and updates ctx->pos on success;
this lets us convert bch2_readdir() to drop_locks_do().
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
-rw-r--r-- | fs/bcachefs/dirent.c | 46 |
1 files changed, 26 insertions, 20 deletions
diff --git a/fs/bcachefs/dirent.c b/fs/bcachefs/dirent.c index ed256c3aa8a5..dd9de8e5a28a 100644 --- a/fs/bcachefs/dirent.c +++ b/fs/bcachefs/dirent.c @@ -528,16 +528,26 @@ int bch2_empty_dir_trans(struct btree_trans *trans, subvol_inum dir) bch2_empty_dir_snapshot(trans, dir.inum, dir.subvol, snapshot); } +static int bch2_dir_emit(struct dir_context *ctx, struct bkey_s_c_dirent d, subvol_inum target) +{ + struct qstr name = bch2_dirent_get_name(d); + bool ret = dir_emit(ctx, name.name, + name.len, + target.inum, + vfs_d_type(d.v->d_type)); + if (ret) + ctx->pos = d.k->p.offset + 1; + return ret; +} + int bch2_readdir(struct bch_fs *c, subvol_inum inum, struct dir_context *ctx) { struct btree_trans *trans = bch2_trans_get(c); struct btree_iter iter; struct bkey_s_c k; - struct bkey_s_c_dirent dirent; subvol_inum target; u32 snapshot; struct bkey_buf sk; - struct qstr name; int ret; bch2_bkey_buf_init(&sk); @@ -554,7 +564,9 @@ retry: if (k.k->type != KEY_TYPE_dirent) continue; - dirent = bkey_s_c_to_dirent(k); + /* dir_emit() can fault and block: */ + bch2_bkey_buf_reassemble(&sk, c, k); + struct bkey_s_c_dirent dirent = bkey_i_to_s_c_dirent(sk.k); ret = bch2_dirent_read_target(trans, inum, dirent, &target); if (ret < 0) @@ -562,28 +574,22 @@ retry: if (ret) continue; - /* dir_emit() can fault and block: */ - bch2_bkey_buf_reassemble(&sk, c, k); - dirent = bkey_i_to_s_c_dirent(sk.k); - bch2_trans_unlock(trans); - - name = bch2_dirent_get_name(dirent); - - ctx->pos = dirent.k->p.offset; - if (!dir_emit(ctx, name.name, - name.len, - target.inum, - vfs_d_type(dirent.v->d_type))) - break; - ctx->pos = dirent.k->p.offset + 1; - /* * read_target looks up subvolumes, we can overflow paths if the * directory has many subvolumes in it + * + * XXX: btree_trans_too_many_iters() is something we'd like to + * get rid of, and there's no good reason to be using it here + * except that we don't yet have a for_each_btree_key() helper + * that does subvolume_get_snapshot(). */ - ret = btree_trans_too_many_iters(trans); - if (ret) + ret = drop_locks_do(trans, + bch2_dir_emit(ctx, dirent, target)) ?: + btree_trans_too_many_iters(trans); + if (ret) { + ret = ret < 0 ? ret : 0; break; + } } bch2_trans_iter_exit(trans, &iter); err: |