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 prepares qemu to accept libqblock. 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. v12: Split a patch to add a function in stubs, other change are in patch 4 to 7 commit messages. v13: Moved another function into stubs, added xml rule in tests/makefile, little changes in patch 4, 6, 7. v14: all: Rebased. 1/10, 2/10: automatically call subdir's clean command if subdir's Makefile added $SUBDIR_CLEAN_RULES, so tests/Makefile do not need to be always included, libqblock's rule can also use it. 3/10: seperated patch for configure support, modified as libcacard's style. 4/10: modifed as libcacard's rule. 5/10: seperated patch, also changed a bit to be a mirror as libcacard's rule. 8/10: use bdrv_pread/bdrv_pwrite, instead of handling the buf allignment by libqblock itself. Removed libqblock-aio.c because most function are in block-obj-y now. 9/10: seperated patch, use LINK instead of custom LT_LINK rule, and now libqblock.la is a dependence in the link rule of test program, to make LINK invoke libtool. v15: 1/9: merged from 1/10, 2/10 of previous version, and use dependce of "clean" in sub Makefile instead of a intermedia variable. 2/9: drop $TOOLS adding in libqblock's Makefile, the rule is added in "all". 3/9: drop libqblock-y in Makefile.objs, directly add them in libqblock's Makfile. 6/9: use __visibility__ in special public marking macro, change macro name to LIBQB_DLL_PUBLIC to avoid confilict in name space, use sizeof(uint64_t) instead of magic number 8 in reserved member, spelling fix. Date of file was changed to 2013. 7/9: date of file was changed to 2013. 8/9: test rule was added to check-unit, drop correspond rule for check-libqblock, drop varible $LIBQBLOCK_LA. Wenchao Xia (9): 1 build: add command check-clean 2 libqblock: build: add configure support 3 libqblock: build: add rule for libqblock.la 4 libqblock: build: add packaging support 5 block: export function path_has_protocol() 6 libqblock: libqblock API design and type defines 7 libqblock: libqblock API implement 8 libqblock: build: add rules for test case 9 libqblock: test: libqblock test example Makefile | 4 +- block.c | 2 +- configure | 26 + include/block/block.h | 2 + libqblock/Makefile | 57 +++ libqblock/libqblock-error.c | 57 +++ libqblock/libqblock-error.h | 49 ++ libqblock/libqblock-internal.h | 68 +++ libqblock/libqblock-types.h | 245 +++++++++ libqblock/libqblock.c | 1071 ++++++++++++++++++++++++++++++++++++++++ libqblock/libqblock.h | 355 +++++++++++++ libqblock/libqblock.pc.in | 13 + tests/Makefile | 23 +- tests/check-libqblock-qcow2.c | 392 +++++++++++++++ 14 files changed, 2361 insertions(+), 3 deletions(-) create mode 100644 libqblock/Makefile 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
