diff options
| author | Kent Overstreet <kent.overstreet@linux.dev> | 2023-06-21 06:00:04 -0400 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-06-21 06:00:44 -0400 |
| commit | eac40840098bfbb5fa1711f6bbce71b27bbccb89 (patch) | |
| tree | 1007072e80a7ee64ef407adcc8b63f1deb9a36b5 | |
| parent | 15571cfa8c55c1f011b8f3e9947a4d8fa97de9dd (diff) | |
bcachefs: Fix lockdep splat in bch2_readdir
dir_emit() can fault (taking mmap_lock); thus we can't be holding btree
locks.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
| -rw-r--r-- | fs/bcachefs/dirent.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/fs/bcachefs/dirent.c b/fs/bcachefs/dirent.c index 1544fc56974f..610dd7425fb4 100644 --- a/fs/bcachefs/dirent.c +++ b/fs/bcachefs/dirent.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 #include "bcachefs.h" +#include "bkey_buf.h" #include "bkey_methods.h" #include "btree_update.h" #include "extents.h" @@ -504,8 +505,10 @@ int bch2_readdir(struct bch_fs *c, subvol_inum inum, struct dir_context *ctx) struct bkey_s_c_dirent dirent; subvol_inum target; u32 snapshot; + struct bkey_buf sk; int ret; + bch2_bkey_buf_init(&sk); bch2_trans_init(&trans, c, 0, 0); retry: bch2_trans_begin(&trans); @@ -528,10 +531,11 @@ retry: if (ret) continue; - /* - * XXX: dir_emit() can fault and block, while we're holding - * locks - */ + /* 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); + ctx->pos = dirent.k->p.offset; if (!dir_emit(ctx, dirent.v->d_name, bch2_dirent_name_bytes(dirent), @@ -554,6 +558,7 @@ err: goto retry; bch2_trans_exit(&trans); + bch2_bkey_buf_exit(&sk, c); return ret; } |