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Allow users of libtoastyfs to operate on files/directories with specific version tags

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cozis
2025-11-24 14:34:57 +01:00
parent 1281bf0822
commit afad13f44f
6 changed files with 128 additions and 42 deletions
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src/client.c
+40 -21
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@@ -123,6 +123,7 @@ typedef struct {
int num_hashes;
uint32_t num_chunks;
uint32_t chunk_size;
uint64_t expect_gen;
UploadSchedule *uploads;
int num_uploads;
int cap_uploads;
@@ -598,7 +599,8 @@ ToastyHandle toasty_begin_create_file(ToastyFS *toasty, ToastyString path,
return begin_create(toasty, path, false, chunk_size);
}
ToastyHandle toasty_begin_delete(ToastyFS *toasty, ToastyString path)
ToastyHandle toasty_begin_delete(ToastyFS *toasty,
ToastyString path, ToastyVersionTag vtag)
{
int opidx = -1;
ToastyHandle handle = TOASTY_INVALID;
@@ -618,7 +620,7 @@ ToastyHandle toasty_begin_delete(ToastyFS *toasty, ToastyString path)
goto unlock_and_exit;
}
uint16_t path_len = path.len;
uint64_t expect_gen = 0; // 0 means skip generation check
uint64_t expect_gen = vtag;
MessageWriter writer;
metadata_server_request_start(toasty, &writer, MESSAGE_TYPE_DELETE);
@@ -642,7 +644,8 @@ unlock_and_exit:
return handle;
}
ToastyHandle toasty_begin_list(ToastyFS *toasty, ToastyString path)
ToastyHandle toasty_begin_list(ToastyFS *toasty,
ToastyString path, ToastyVersionTag vtag)
{
int opidx = -1;
ToastyHandle handle = TOASTY_INVALID;
@@ -662,7 +665,7 @@ ToastyHandle toasty_begin_list(ToastyFS *toasty, ToastyString path)
goto unlock_and_exit;
}
uint16_t path_len = path.len;
uint64_t expect_gen = 0; // 0 means skip generation check
uint64_t expect_gen = vtag;
MessageWriter writer;
metadata_server_request_start(toasty, &writer, MESSAGE_TYPE_LIST);
@@ -686,12 +689,14 @@ unlock_and_exit:
return handle;
}
static int send_read_message(ToastyFS *toasty, int opidx, int tag, ToastyString path, uint32_t offset, uint32_t length)
static int send_read_message(ToastyFS *toasty, int opidx,
int tag, ToastyString path, uint32_t offset,
uint32_t length, ToastyVersionTag vtag)
{
if (path.len > UINT16_MAX)
return -1;
uint16_t path_len = path.len;
uint64_t expect_gen = 0; // 0 means skip generation check
uint64_t expect_gen = vtag;
MessageWriter writer;
metadata_server_request_start(toasty, &writer, MESSAGE_TYPE_READ);
@@ -705,7 +710,8 @@ static int send_read_message(ToastyFS *toasty, int opidx, int tag, ToastyString
return 0;
}
ToastyHandle toasty_begin_read(ToastyFS *toasty, ToastyString path, int off, void *dst, int len)
ToastyHandle toasty_begin_read(ToastyFS *toasty, ToastyString path,
int off, void *dst, int len, ToastyVersionTag vtag)
{
int opidx = -1;
ToastyHandle handle = TOASTY_INVALID;
@@ -719,7 +725,7 @@ ToastyHandle toasty_begin_read(ToastyFS *toasty, ToastyString path, int off, voi
if (opidx < 0)
goto unlock_and_exit;
if (send_read_message(toasty, opidx, TAG_RETRIEVE_METADATA_FOR_READ, path, off, len) < 0) {
if (send_read_message(toasty, opidx, TAG_RETRIEVE_METADATA_FOR_READ, path, off, len, vtag) < 0) {
free_operation(toasty, opidx);
opidx = -1;
goto unlock_and_exit;
@@ -736,7 +742,9 @@ unlock_and_exit:
return handle;
}
ToastyHandle toasty_begin_write(ToastyFS *toasty, ToastyString path, int off, void *src, int len)
ToastyHandle toasty_begin_write(ToastyFS *toasty,
ToastyString path, int off, void *src, int len,
ToastyVersionTag vtag)
{
int opidx = -1;
ToastyHandle handle = TOASTY_INVALID;
@@ -752,7 +760,7 @@ ToastyHandle toasty_begin_write(ToastyFS *toasty, ToastyString path, int off, vo
toasty->operations[opidx].path = path; // TODO: must be a copy
if (send_read_message(toasty, opidx, TAG_RETRIEVE_METADATA_FOR_WRITE, path, off, len) < 0) {
if (send_read_message(toasty, opidx, TAG_RETRIEVE_METADATA_FOR_WRITE, path, off, len, vtag) < 0) {
free_operation(toasty, opidx);
opidx = -1;
goto unlock_and_exit;
@@ -1462,6 +1470,7 @@ static void process_event_for_write(ToastyFS *toasty,
toasty->operations[opidx].result = (ToastyResult) { .type=TOASTY_RESULT_WRITE_ERROR, .user=toasty->operations[opidx].user };
return;
}
toasty->operations[opidx].expect_gen = gen;
uint32_t chunk_size;
if (!binary_read(&reader, &chunk_size, sizeof(chunk_size))) {
@@ -1961,7 +1970,7 @@ static void process_event_for_write(ToastyFS *toasty,
assert(0); // TODO
}
uint16_t path_len = path.len;
uint64_t expect_gen = 0; // 0 means skip generation check - but per protocol, WRITE can't use 0
uint64_t expect_gen = toasty->operations[opidx].expect_gen;
uint32_t num_chunks = num_upload_results;
@@ -2315,7 +2324,8 @@ int toasty_wait_result(ToastyFS *toasty, ToastyHandle handle, ToastyResult *resu
return 0;
}
int toasty_create_dir(ToastyFS *toasty, ToastyString path)
int toasty_create_dir(ToastyFS *toasty, ToastyString path,
ToastyVersionTag *vtag)
{
ToastyHandle handle = toasty_begin_create_dir(toasty, path);
if (handle == TOASTY_INVALID)
@@ -2330,12 +2340,13 @@ int toasty_create_dir(ToastyFS *toasty, ToastyString path)
return -1;
}
if (vtag) *vtag = result.vtag;
toasty_free_result(&result);
return 0;
}
int toasty_create_file(ToastyFS *toasty, ToastyString path,
unsigned int chunk_size)
unsigned int chunk_size, ToastyVersionTag *vtag)
{
ToastyHandle handle = toasty_begin_create_file(toasty, path, chunk_size);
if (handle == TOASTY_INVALID)
@@ -2350,13 +2361,15 @@ int toasty_create_file(ToastyFS *toasty, ToastyString path,
return -1;
}
if (vtag) *vtag = result.vtag;
toasty_free_result(&result);
return 0;
}
int toasty_delete(ToastyFS *toasty, ToastyString path)
int toasty_delete(ToastyFS *toasty, ToastyString path,
ToastyVersionTag vtag)
{
ToastyHandle handle = toasty_begin_delete(toasty, path);
ToastyHandle handle = toasty_begin_delete(toasty, path, vtag);
if (handle == TOASTY_INVALID)
return -1;
@@ -2373,9 +2386,10 @@ int toasty_delete(ToastyFS *toasty, ToastyString path)
return 0;
}
int toasty_list(ToastyFS *toasty, ToastyString path, ToastyListing *listing)
int toasty_list(ToastyFS *toasty, ToastyString path,
ToastyListing *listing, ToastyVersionTag *vtag)
{
ToastyHandle handle = toasty_begin_list(toasty, path);
ToastyHandle handle = toasty_begin_list(toasty, path, vtag ? *vtag : 0);
if (handle == TOASTY_INVALID)
return -1;
@@ -2388,6 +2402,9 @@ int toasty_list(ToastyFS *toasty, ToastyString path, ToastyListing *listing)
return -1;
}
if (vtag)
*vtag = result.vtag;
if (listing)
*listing = result.listing;
else
@@ -2401,9 +2418,9 @@ void toasty_free_listing(ToastyListing *listing)
}
int toasty_read(ToastyFS *toasty, ToastyString path,
int off, void *dst, int len)
int off, void *dst, int len, ToastyVersionTag *vtag)
{
ToastyHandle handle = toasty_begin_read(toasty, path, off, dst, len);
ToastyHandle handle = toasty_begin_read(toasty, path, off, dst, len, vtag ? *vtag : 0);
if (handle == TOASTY_INVALID)
return -1;
@@ -2416,15 +2433,16 @@ int toasty_read(ToastyFS *toasty, ToastyString path,
return -1;
}
if (vtag) *vtag = result.vtag;
int bytes_read = result.bytes_read;
toasty_free_result(&result);
return bytes_read;
}
int toasty_write(ToastyFS *toasty, ToastyString path,
int off, void *src, int len)
int off, void *src, int len, ToastyVersionTag *vtag)
{
ToastyHandle handle = toasty_begin_write(toasty, path, off, src, len);
ToastyHandle handle = toasty_begin_write(toasty, path, off, src, len, vtag ? *vtag : 0);
if (handle == TOASTY_INVALID)
return -1;
@@ -2437,6 +2455,7 @@ int toasty_write(ToastyFS *toasty, ToastyString path,
return -1;
}
if (vtag) *vtag = result.vtag;
toasty_free_result(&result);
return 0; // TODO: return the number of bytes written?
}