kernel/git - git - PowerEL Git System

Commit Graph

Author	SHA1	Message	Date
Junio C Hamano	3c9fc074c2	index-pack --verify: read anomalous offsets from v2 idx file A pack v2 .idx file usually records offset using 64-bit representation only when the offset does not fit within 31-bit, but you can handcraft your .idx file to record smaller offset using 64-bit, storing all zero in the upper 4-byte. By inspecting the original idx file when running index-pack --verify, encode such low offsets that do not need to be in 64-bit but are encoded using 64-bit just like the original idx file so that we can still validate the pack/idx pair by comparing the idx file recomputed with the original. Signed-off-by: Junio C Hamano <gitster@pobox.com>	14 years ago
Junio C Hamano	fb956c1f44	write_idx_file: need_large_offset() helper function Signed-off-by: Junio C Hamano <gitster@pobox.com>	14 years ago
Junio C Hamano	e337a04de2	index-pack: --verify Given an existing .pack file and the .idx file that describes it, this new mode of operation reads and re-index the packfile and makes sure the existing .idx file matches the result byte-for-byte. All the objects in the .pack file are validated during this operation as well. Unlike verify-pack, which visits each object described in the .idx file in the SHA-1 order, index-pack efficiently exploits the delta-chain to avoid rebuilding the objects that are used as the base of deltified objects over and over again while validating the objects, resulting in much quicker verification of the .pack file and its .idx file. This version however cannot verify a .pack/.idx pair with a handcrafted v2 index that uses 64-bit offset representation for offsets that would fit within 31-bit. You can create such an .idx file by giving a custom offset to --index-version option to the command. Signed-off-by: Junio C Hamano <gitster@pobox.com>	14 years ago
Junio C Hamano	ebcfb3791a	write_idx_file: introduce a struct to hold idx customization options Remove two globals, pack_idx_default version and pack_idx_off32_limit, and place them in a pack_idx_option structure. Allow callers to pass it to write_idx_file() as a parameter. Adjust all callers to the API change. Signed-off-by: Junio C Hamano <gitster@pobox.com>	14 years ago
Nicolas Pitre	f965c525a4	move encode_in_pack_object_header() to a better place Commit `1b22b6c897` made duplicated versions of encode_header() into a common version called encode_in_pack_object_header(). There is however a better location that sha1_file.c for such a function though, as sha1_file.c contains nothing related to the creation of packs, and it is quite populated already. Also the comment that was moved to the header file should really remain near the function as it covers implementation details and provides no information about the actual function interface. Signed-off-by: Nicolas Pitre <nico@fluxnic.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>	15 years ago
Linus Torvalds	3bb7256281	make "index-pack" a built-in This required some fairly trivial packfile function 'const' cleanup, since the builtin commands get a const char *argv[] array. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>	15 years ago
Thomas Rast	d824cbba02	Convert existing die(..., strerror(errno)) to die_errno() Change calls to die(..., strerror(errno)) to use the new die_errno(). In the process, also make slight style adjustments: at least state _something_ about the function that failed (instead of just printing the pathname), and put paths in single quotes. Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>	16 years ago
Junio C Hamano	6e180cdcec	Make sure objects/pack exists before creating a new pack In a repository created with git older than `f49fb35` (git-init-db: create "pack" subdirectory under objects, 2005-06-27), objects/pack/ directory is not created upon initialization. It was Ok because subdirectories are created as needed inside directories init-db creates, and back then, packfiles were recent invention. After the said commit, new codepaths started relying on the presense of objects/pack/ directory in the repository. This was exacerbated with `8b4eb6b` (Do not perform cross-directory renames when creating packs, 2008-09-22) that moved the location temporary pack files are created from objects/ directory to objects/pack/ directory, because moving temporary to the final location was done carefully with lazy leading directory creation. Many packfile related operations in such an old repository can fail mysteriously because of this. This commit introduces two helper functions to make things work better. - odb_mkstemp() is a specialized version of mkstemp() to refactor the code and teach it to create leading directories as needed; - odb_pack_keep() refactors the code to create a ".keep" file while create leading directories as needed. Signed-off-by: Junio C Hamano <gitster@pobox.com>	16 years ago
Nicolas Pitre	9126f0091f	fix openssl headers conflicting with custom SHA1 implementations On ARM I have the following compilation errors: CC fast-import.o In file included from cache.h:8, from builtin.h:6, from fast-import.c:142: arm/sha1.h:14: error: conflicting types for 'SHA_CTX' /usr/include/openssl/sha.h:105: error: previous declaration of 'SHA_CTX' was here arm/sha1.h:16: error: conflicting types for 'SHA1_Init' /usr/include/openssl/sha.h:115: error: previous declaration of 'SHA1_Init' was here arm/sha1.h:17: error: conflicting types for 'SHA1_Update' /usr/include/openssl/sha.h:116: error: previous declaration of 'SHA1_Update' was here arm/sha1.h:18: error: conflicting types for 'SHA1_Final' /usr/include/openssl/sha.h:117: error: previous declaration of 'SHA1_Final' was here make: *** [fast-import.o] Error 1 This is because openssl header files are always included in git-compat-util.h since commit `684ec6c63c` whenever NO_OPENSSL is not set, which somehow brings in <openssl/sha1.h> clashing with the custom ARM version. Compilation of git is probably broken on PPC too for the same reason. Turns out that the only file requiring openssl/ssl.h and openssl/err.h is imap-send.c. But only moving those problematic includes there doesn't solve the issue as it also includes cache.h which brings in the conflicting local SHA1 header file. As suggested by Jeff King, the best solution is to rename our references to SHA1 functions and structure to something git specific, and define those according to the implementation used. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>	16 years ago
Petr Baudis	8b4eb6b6cd	Do not perform cross-directory renames when creating packs A comment on top of create_tmpfile() describes caveats ('can have problems on various systems (FAT, NFS, Coda)') that should apply in this situation as well. This in the end did not end up solving any of my personal problems, but it might be a useful cleanup patch nevertheless. Signed-off-by: Petr Baudis <pasky@suse.cz> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>	16 years ago
Nicolas Pitre	d35825da6d	fixup_pack_header_footer(): use nicely aligned buffer sizes It should be more efficient to use nicely aligned buffer sizes, either for filesystem operations or SHA1 checksums. Also, using a relatively small nominal size might allow for the data to remain in L1 cache between both SHA1_Update() calls. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>	16 years ago
Nicolas Pitre	abeb40e5aa	improve reliability of fixup_pack_header_footer() Currently, this function has the potential to read corrupted pack data from disk and give it a valid SHA1 checksum. Let's add the ability to validate SHA1 checksum of existing data along the way, including before and after any arbitrary point in the pack. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>	16 years ago
Linus Torvalds	0c68d386da	index-pack: be careful after fixing up the header/footer The index-pack command, when processing a thin pack, fixed up the pack after-the-fact. It forgets to fsync the result, because it only did that in one path rather in all cases of fixup. This moves the fsync_or_die() to the fix-up routine itself, rather than doing it in one of the callers, so that all cases are covered. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>	16 years ago
Nicolas Pitre	c0a5e2d477	pack.indexversion config option now defaults to 2 As announced for 1.6.0. Git older than version 1.5.2 (or any other git version with this option set to 1) may revert to version 1 of the pack index by manually deleting all .idx files and recreating them using 'git index-pack'. Communication over the git native protocol is unaffected since the pack index is never transferred. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>	17 years ago
Linus Torvalds	4c81b03e30	Make pack creation always fsync() the result This means that we can depend on packs always being stable on disk, simplifying a lot of the object serialization worries. And unlike loose objects, serializing pack creation IO isn't going to be a performance killer. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>	17 years ago
Heikki Orsila	c697ad143b	Cleanup xread() loops to use read_in_full() Signed-off-by: Heikki Orsila <heikki.orsila@iki.fi> Signed-off-by: Junio C Hamano <gitster@pobox.com>	17 years ago
Nicolas Pitre	4049b9cfc0	fix const issues with some functions Two functions, namely write_idx_file() and open_pack_file(), currently return a const pointer. However that pointer is either a copy of the first argument, or set to a malloc'd buffer when that first argument is null. In the later case it is wrong to qualify that pointer as const since ownership of the buffer is transferred to the caller to dispose of, and obviously the free() function is not meant to be passed const pointers. Making the return pointer not const causes a warning when the first argument is returned since that argument is also marked const. The correct thing to do is therefore to remove the const qualifiers, avoiding the need for ugly casts only to silence some warnings. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>	17 years ago
Shawn O. Pearce	106764e651	Refactor index-pack "keep $sha1" handling for reuse There is a subtle (but important) linkage between receive-pack and index-pack that allows index-pack to create a packfile but protect it from being deleted by a concurrent `git repack -a -d` operation. The linkage works by having index-pack mark the newly created pack with a ".keep" file and then it passes the SHA-1 name of that new packfile to receive-pack along its stdout channel. The receive-pack process must unkeep the packfile by deleting the .keep file, but can it can only do so after all elgible refs have been updated in the receiving repository. This ensures that the packfile is either kept or its objects are reachable, preventing a concurrent repacker from deleting the packfile before it can determine that its objects are actually needed by the repository. The new builtin-fetch code needs to perform the same actions if it choose to run index-pack rather than unpack-objects, so I am moving this code out to its own function where both receive-pack and fetch-pack are able to invoke it when necessary. The caller is responsible for deleting the returned ".keep" and freeing the path if the returned path is not NULL. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>	17 years ago
Luiz Fernando N. Capitulino	7647b17f1d	Use xmkstemp() instead of mkstemp() xmkstemp() performs error checking and prints a standard error message when an error occur. Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Signed-off-by: Junio C Hamano <gitster@pobox.com>	17 years ago
Geert Bosch	aa7e44bf57	Unify write_index_file functions This patch unifies the write_index_file functions in builtin-pack-objects.c and index-pack.c. As the name "index" is overloaded in git, move in the direction of using "idx" and "pack idx" when refering to the pack index. There should be no change in functionality. Signed-off-by: Geert Bosch <bosch@gnat.com> Acked-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <junkio@cox.net>	18 years ago
Johan Herland	2924415f4f	Fix signedness on return value from xread() The return value from xread() is ssize_t. Paolo Teti <paolo.teti@gmail.com> pointed out that in this case, the signed return value was assigned to an unsigned type (size_t). This patch fixes that. Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <junkio@cox.net>	18 years ago
Dana L. How	8b0eca7c7b	Create pack-write.c for common pack writing code Include a generalized fixup_pack_header_footer() in this new file. Needed by git-repack --max-pack-size feature in a later patchset. [sp: Moved close(pack_fd) to callers, to support index-pack, and changed name to better indicate it is for packfiles.] Signed-off-by: Dana L. How <danahow@gmail.com> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>	18 years ago

24 Commits (48f36dcd7320d27a840e89fc2aa7ab11716951c6)