These patches introduce libqblock API, make subdir-libqblock and make check-libqblock could build this library. Functionalities: 1 create a new image. 2 sync access of an image. 3 basic image information retrieving such as backing file. 4 detect if a sector is allocated in an image. Supported Formats: ALL using file protocols.
Patch 1 to 3 is independent with libqblock, which fix small bug and improve qemu, can be applied without libqblock. Patch 1 have been sent as a fix for Qemu 1.3, Patch 3 have been sent by others, include them here just to make sure it can work. If they are upstreamed pls ignore. v2: Insert reserved bytes into union. Use uint64_t instead of size_t, offset. Use const char * in filename pointer. Initialization function removed and it was automatically executed when library is loaded. Added compile flag visibility=hidden, to avoid name space pollution. Structure naming style changed. Using byte unit instead of sector for every API. Added a member in image static information structure, to report logical sector size, which is always 512 now. Read and write API can take request not aligned to 512 now. It returns the byte number that have succeed in operation, but now either negative value or the number requested would be returned, because qemu block sync I/O API would not return such number. Typo fix due to comments and improved documents. v3: Removed the code about OOM error, introduced GError. Used a table to map from string to enum types about format. Use typedef for every structure. Improved the gcc compiler macro to warn if gcc was not used. Global variable name changed with prefix libqb_. The struct QBlockStaticInfo was changed to folder full format related information inside, and a new member with pointers pointing to the mostly used members, such as backing file, virt size, was added. This would allow the user to get full information about how it is created in the future. Each patch in the serial can work with qemu now. Typo fixes. v4: Renamed QBroker to QBlockContext. Removed tool objs out of libqblock. Added a check in initialization about structure size for ABI. Added a new helper API to duplicate protocol information, helps to open files in a backing file chain. Check-libqblock will not rebuild libqblock every time now. Test case file renamed to "libqblock-[FMT].c". Test use gtest framework now. Test do random creation of test file now, added check for information API in it. Test do random sync io instead of fixed offset io now. Test accept one parameter about where to place the test image, now it is ./tests/libqblock/test_images. v5: Makefile of libqblock was adjusted to be similar as libcacard, added spec file and install section. Removed warning when GCC was not found. Structure names were changed to better ones. Removed the union typedef that contain reserved bytes to reduce the folder depth. Some format related enum options was changed to better name. Added accessors about image static information, hide indirect accessing member detail in the structure. Test Makefile do not create diretory now, test case create it themself. Test build system do not use libtool now, and removed qtest-obj-y in its dependency, make check will automatically execute test anyway now. Removed "ifeq ($(LIBTOOL),)" in Makefile. v6: Remove address pointer member in image static info structure. v7: Support out of tree building. v8: Fix a bug in out of tree building. v9: Rebase and splitted out small fix patch for qemu. v10: Rebased to upstream, adjusted libqblock build system according to Paolo's comments. v11: Adjusting code in patch 4 to 7, details are in the child patch's commit message. Wenchao Xia (7): Build system fix distclean error for pixman Build system clean tests directory clearly block export function path_has_protocol libqblock build system libqblock API design and type defines libqblock API implement libqblock test example .gitignore | 2 + Makefile | 33 +- block.c | 2 +- block.h | 2 + configure | 41 ++- libqblock/Makefile | 74 +++ libqblock/libqblock-aio.c | 175 ++++++ libqblock/libqblock-aio.h | 6 + libqblock/libqblock-error.c | 57 ++ libqblock/libqblock-error.h | 49 ++ libqblock/libqblock-internal.h | 68 +++ libqblock/libqblock-types.h | 245 ++++++++ libqblock/libqblock.c | 1195 ++++++++++++++++++++++++++++++++++++++++ libqblock/libqblock.h | 344 ++++++++++++ libqblock/libqblock.pc.in | 13 + tests/Makefile | 39 ++- tests/check-libqblock-qcow2.c | 392 +++++++++++++ 17 files changed, 2726 insertions(+), 11 deletions(-) create mode 100644 libqblock/Makefile create mode 100644 libqblock/libqblock-aio.c create mode 100644 libqblock/libqblock-aio.h create mode 100644 libqblock/libqblock-error.c create mode 100644 libqblock/libqblock-error.h create mode 100644 libqblock/libqblock-internal.h create mode 100644 libqblock/libqblock-types.h create mode 100644 libqblock/libqblock.c create mode 100644 libqblock/libqblock.h create mode 100644 libqblock/libqblock.pc.in create mode 100644 tests/check-libqblock-qcow2.c
