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bcachefs: bch2_trans_log_msg()

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Add a new helper for logging messages to the journal - a new debugging
tool, an alternative to trace_printk().

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
This commit is contained in:
Kent Overstreet 2022-03-30 15:44:12 -04:00 • committed by Kent Overstreet
parent 2a6870ada4
commit 5aabb32442
2 changed files with 29 additions and 0 deletions
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2
fs/bcachefs/btree_update.h
View file

@ -83,6 +83,8 @@ void bch2_trans_commit_hook(struct btree_trans *,
struct btree_trans_commit_hook *);
int __bch2_trans_commit(struct btree_trans *);
int bch2_trans_log_msg(struct btree_trans *, const char *);
/**
* bch2_trans_commit - insert keys at given iterator positions
*

27
fs/bcachefs/btree_update_leaf.c
View file

@ -1795,3 +1795,30 @@ int bch2_btree_delete_range(struct bch_fs *c, enum btree_id id,
bch2_btree_delete_range_trans(&trans, id, start, end,
update_flags, journal_seq));
}
int bch2_trans_log_msg(struct btree_trans *trans, const char *msg)
{
unsigned len = strlen(msg);
unsigned u64s = DIV_ROUND_UP(len, sizeof(u64));
struct jset_entry_log *l;
int ret;
ret = darray_make_room(&trans->extra_journal_entries, jset_u64s(u64s));
if (ret)
return ret;
l = (void *) &darray_top(trans->extra_journal_entries);
l->entry.u64s = cpu_to_le16(u64s);
l->entry.btree_id = 0;
l->entry.level = 1;
l->entry.type = BCH_JSET_ENTRY_log;
l->entry.pad[0] = 0;
l->entry.pad[1] = 0;
l->entry.pad[2] = 0;
memcpy(l->d, msg, len);
while (len & 7)
l->d[len++] = '\0';
trans->extra_journal_entries.nr += jset_u64s(u64s);
return 0;
}