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bcachefs: Add extra verbose logging for ro path

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Also log time waiting for c->writes references to be dropped; this will
help in debugging why unmounts are taking longer than they should.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2023-11-22 18:30:43 -05:00
parent 30418de09e
commit e7f7ddedd6
1 changed files with 12 additions and 2 deletions
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14
fs/bcachefs/super.c
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@ -276,6 +276,8 @@ void bch2_fs_read_only(struct bch_fs *c)
BUG_ON(test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags));
bch_verbose(c, "going read-only");
/*
* Block new foreground-end write operations from starting - any new
* writes will return -EROFS:
@ -303,13 +305,21 @@ void bch2_fs_read_only(struct bch_fs *c)
test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags) ||
test_bit(BCH_FS_EMERGENCY_RO, &c->flags));
bool writes_disabled = test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags);
if (writes_disabled)
bch_verbose(c, "finished waiting for writes to stop");
__bch2_fs_read_only(c);
wait_event(bch2_read_only_wait,
test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags));
if (!writes_disabled)
bch_verbose(c, "finished waiting for writes to stop");
clear_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags);
clear_bit(BCH_FS_GOING_RO, &c->flags);
clear_bit(BCH_FS_RW, &c->flags);
if (!bch2_journal_error(&c->journal) &&
!test_bit(BCH_FS_ERROR, &c->flags) &&
@ -324,9 +334,9 @@ void bch2_fs_read_only(struct bch_fs *c)
bch_verbose(c, "marking filesystem clean");
bch2_fs_mark_clean(c);
} else {
bch_verbose(c, "done going read-only, filesystem not clean");
}
clear_bit(BCH_FS_RW, &c->flags);
}
static void bch2_fs_read_only_work(struct work_struct *work)