[PATCH v3 08/10] reftable/record: adapt `reftable_record_key()` to handle allocation failures
- From
Patrick Steinhardt <ps@pks.im>
- Date
- Oct 17, 2024, 04:54 UTC
- Message-ID
- <268e4cd6fc6fb0d9ab6216723dc39c5cada3734c.1729140565.git.ps@pks.im>
- In-Reply-To
- <cover.1729140565.git.ps@pks.im>
The `reftable_record_key()` function cannot pass any errors to the caller as it has a `void` return type. Adapt it and its callers such that we can handle errors and start handling allocation failures.
Signed-off-by: Patrick Steinhardt <ps@pks.im> --- reftable/block.c | 20 +++++++++++++++----- reftable/reader.c | 8 ++++++-- reftable/record.c | 32 ++++++++++++++++++++------------ reftable/record.h | 4 ++-- reftable/writer.c | 5 ++++- 5 files changed, 47 insertions(+), 22 deletions(-)
diff --git a/reftable/block.c b/reftable/block.c index 4f62b823db8..697b8b41531 100644 --- a/reftable/block.c +++ b/reftable/block.c @@ -111,9 +111,12 @@ int block_writer_add(struct block_writer *w, struct reftable_record *rec) int is_restart = 0; struct reftable_buf key = REFTABLE_BUF_INIT; int n = 0; - int err = -1; + int err; + + err = reftable_record_key(rec, &key); + if (err < 0) + goto done; - reftable_record_key(rec, &key); if (!key.len) { err = REFTABLE_API_ERROR; goto done; @@ -121,13 +124,17 @@ int block_writer_add(struct block_writer *w, struct reftable_record *rec) n = reftable_encode_key(&is_restart, out, last, key, reftable_record_val_type(rec)); - if (n < 0) + if (n < 0) { + err = -1; goto done; + } string_view_consume(&out, n); n = reftable_record_encode(rec, out, w->hash_size); - if (n < 0) + if (n < 0) { + err = -1; goto done; + } string_view_consume(&out, n); err = block_writer_register_restart(w, start.len - out.len, is_restart, @@ -522,6 +529,10 @@ int block_iter_seek_key(struct block_iter *it, const struct block_reader *br, goto done; } + err = reftable_record_key(&rec, &it->last_key); + if (err < 0) + goto done; + /* * Check whether the current key is greater or equal to the * sought-after key. In case it is greater we know that the @@ -536,7 +547,6 @@ int block_iter_seek_key(struct block_iter *it, const struct block_reader *br, * to `last_key` now, and naturally all keys share a prefix * with themselves. */ - reftable_record_key(&rec, &it->last_key); if (reftable_buf_cmp(&it->last_key, want) >= 0) { it->next_off = prev_off; goto done; diff --git a/reftable/reader.c b/reftable/reader.c index 388f8bf6d7b..ab89efd9c55 100644 --- a/reftable/reader.c +++ b/reftable/reader.c @@ -356,7 +356,9 @@ static int table_iter_seek_linear(struct table_iter *ti, int err; reftable_record_init(&rec, reftable_record_type(want)); - reftable_record_key(want, &want_key); + err = reftable_record_key(want, &want_key); + if (err < 0) + goto done; /* * First we need to locate the block that must contain our record. To @@ -439,7 +441,9 @@ static int table_iter_seek_indexed(struct table_iter *ti, }; int err; - reftable_record_key(rec, &want_index.u.idx.last_key); + err = reftable_record_key(rec, &want_index.u.idx.last_key); + if (err < 0) + goto done; /* * The index may consist of multiple levels, where each level may have diff --git a/reftable/record.c b/reftable/record.c index 0182c973437..672c5f909a9 100644 --- a/reftable/record.c +++ b/reftable/record.c @@ -207,12 +207,12 @@ int reftable_decode_key(struct reftable_buf *last_key, uint8_t *extra, return start_len - in.len; } -static void reftable_ref_record_key(const void *r, struct reftable_buf *dest) +static int reftable_ref_record_key(const void *r, struct reftable_buf *dest) { const struct reftable_ref_record *rec = (const struct reftable_ref_record *)r; reftable_buf_reset(dest); - reftable_buf_addstr(dest, rec->refname); + return reftable_buf_addstr(dest, rec->refname); } static int reftable_ref_record_copy_from(void *rec, const void *src_rec, @@ -465,12 +465,12 @@ static struct reftable_record_vtable reftable_ref_record_vtable = { .cmp = &reftable_ref_record_cmp_void, }; -static void reftable_obj_record_key(const void *r, struct reftable_buf *dest) +static int reftable_obj_record_key(const void *r, struct reftable_buf *dest) { const struct reftable_obj_record *rec = (const struct reftable_obj_record *)r; reftable_buf_reset(dest); - reftable_buf_add(dest, rec->hash_prefix, rec->hash_prefix_len); + return reftable_buf_add(dest, rec->hash_prefix, rec->hash_prefix_len); } static void reftable_obj_record_release(void *rec) @@ -664,19 +664,27 @@ static struct reftable_record_vtable reftable_obj_record_vtable = { .cmp = &reftable_obj_record_cmp_void, }; -static void reftable_log_record_key(const void *r, struct reftable_buf *dest) +static int reftable_log_record_key(const void *r, struct reftable_buf *dest) { const struct reftable_log_record *rec = (const struct reftable_log_record *)r; - int len = strlen(rec->refname); + int len = strlen(rec->refname), err; uint8_t i64[8]; uint64_t ts = 0; + reftable_buf_reset(dest); - reftable_buf_add(dest, (uint8_t *)rec->refname, len + 1); + err = reftable_buf_add(dest, (uint8_t *)rec->refname, len + 1); + if (err < 0) + return err; ts = (~ts) - rec->update_index; put_be64(&i64[0], ts); - reftable_buf_add(dest, i64, sizeof(i64)); + + err = reftable_buf_add(dest, i64, sizeof(i64)); + if (err < 0) + return err; + + return 0; } static int reftable_log_record_copy_from(void *rec, const void *src_rec, @@ -1027,11 +1035,11 @@ static struct reftable_record_vtable reftable_log_record_vtable = { .cmp = &reftable_log_record_cmp_void, }; -static void reftable_index_record_key(const void *r, struct reftable_buf *dest) +static int reftable_index_record_key(const void *r, struct reftable_buf *dest) { const struct reftable_index_record *rec = r; reftable_buf_reset(dest); - reftable_buf_add(dest, rec->last_key.buf, rec->last_key.len); + return reftable_buf_add(dest, rec->last_key.buf, rec->last_key.len); } static int reftable_index_record_copy_from(void *rec, const void *src_rec, @@ -1124,9 +1132,9 @@ static struct reftable_record_vtable reftable_index_record_vtable = { .cmp = &reftable_index_record_cmp, }; -void reftable_record_key(struct reftable_record *rec, struct reftable_buf *dest) +int reftable_record_key(struct reftable_record *rec, struct reftable_buf *dest) { - reftable_record_vtable(rec)->key(reftable_record_data(rec), dest); + return reftable_record_vtable(rec)->key(reftable_record_data(rec), dest); } int reftable_record_encode(struct reftable_record *rec, struct string_view dest, diff --git a/reftable/record.h b/reftable/record.h index 271da3bf360..25aa908c859 100644 --- a/reftable/record.h +++ b/reftable/record.h @@ -40,7 +40,7 @@ int put_var_int(struct string_view *dest, uint64_t val); /* Methods for records. */ struct reftable_record_vtable { /* encode the key of to a uint8_t reftable_buf. */ - void (*key)(const void *rec, struct reftable_buf *dest); + int (*key)(const void *rec, struct reftable_buf *dest); /* The record type of ('r' for ref). */ uint8_t type; @@ -137,7 +137,7 @@ void reftable_record_init(struct reftable_record *rec, uint8_t typ); /* see struct record_vtable */ int reftable_record_cmp(struct reftable_record *a, struct reftable_record *b); int reftable_record_equal(struct reftable_record *a, struct reftable_record *b, int hash_size); -void reftable_record_key(struct reftable_record *rec, struct reftable_buf *dest); +int reftable_record_key(struct reftable_record *rec, struct reftable_buf *dest); int reftable_record_copy_from(struct reftable_record *rec, struct reftable_record *src, int hash_size); uint8_t reftable_record_val_type(struct reftable_record *rec); diff --git a/reftable/writer.c b/reftable/writer.c index da6941a78ac..377db709c85 100644 --- a/reftable/writer.c +++ b/reftable/writer.c @@ -249,7 +249,10 @@ static int writer_add_record(struct reftable_writer *w, struct reftable_buf key = REFTABLE_BUF_INIT; int err; - reftable_record_key(rec, &key); + err = reftable_record_key(rec, &key); + if (err < 0) + goto done; + if (reftable_buf_cmp(&w->last_key, &key) >= 0) { err = REFTABLE_API_ERROR; goto done;
-- 2.47.0.72.gef8ce8f3d4.dirty