Date: Tue, 28 Nov 2023 21:11:47 GMT From: Martin Matuska <mm@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 5858f93a8b66 - stable/13 - zfs: cherry-pick commit from master Message-ID: <202311282111.3ASLBlnK097019@gitrepo.freebsd.org>
next in thread | raw e-mail | index | archive | help
The branch stable/13 has been updated by mm: URL: https://cgit.FreeBSD.org/src/commit/?id=5858f93a8b66aa6331d99bed6aad68bc7e9648ba commit 5858f93a8b66aa6331d99bed6aad68bc7e9648ba Author: Rob N <robn@despairlabs.com> AuthorDate: 2023-11-28 17:07:57 +0000 Commit: Martin Matuska <mm@FreeBSD.org> CommitDate: 2023-11-28 21:07:30 +0000 zfs: cherry-pick commit from master #15571 30d581121 dnode_is_dirty: check dnode and its data for dirtiness Obtained from: OpenZFS (cherry picked from commit 30d581121bb122c90959658e7b28b1672d342897) --- sys/contrib/openzfs/module/zfs/dnode.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/sys/contrib/openzfs/module/zfs/dnode.c b/sys/contrib/openzfs/module/zfs/dnode.c index a9aaa4d21d2b..efebc443a210 100644 --- a/sys/contrib/openzfs/module/zfs/dnode.c +++ b/sys/contrib/openzfs/module/zfs/dnode.c @@ -1773,7 +1773,14 @@ dnode_try_claim(objset_t *os, uint64_t object, int slots) } /* - * Checks if the dnode contains any uncommitted dirty records. + * Checks if the dnode itself is dirty, or is carrying any uncommitted records. + * It is important to check both conditions, as some operations (eg appending + * to a file) can dirty both as a single logical unit, but they are not synced + * out atomically, so checking one and not the other can result in an object + * appearing to be clean mid-way through a commit. + * + * Do not change this lightly! If you get it wrong, dmu_offset_next() can + * detect a hole where there is really data, leading to silent corruption. */ boolean_t dnode_is_dirty(dnode_t *dn) @@ -1781,7 +1788,8 @@ dnode_is_dirty(dnode_t *dn) mutex_enter(&dn->dn_mtx); for (int i = 0; i < TXG_SIZE; i++) { - if (multilist_link_active(&dn->dn_dirty_link[i])) { + if (multilist_link_active(&dn->dn_dirty_link[i]) || + !list_is_empty(&dn->dn_dirty_records[i])) { mutex_exit(&dn->dn_mtx); return (B_TRUE); }
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?202311282111.3ASLBlnK097019>