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@xxxxxxxxx> --- * This is a re-roll of the earlier patch in response to Fedora bugzilla entry https://bugzilla.redhat.com/show_bug.cgi?id=483546 The earlier one didn't cover the objects/pack/pack-*.keep codepaths, and wouldn't have been sufficient to fix the breakage reported by $gmane/111316. This is meant to apply cleanly to the v1.6.0.X maintenance track and upwards. builtin-pack-objects.c | 5 ++--- fast-import.c | 14 +++++--------- git-compat-util.h | 2 ++ index-pack.c | 23 ++++++++++++----------- pack-write.c | 6 ++---- t/t5300-pack-object.sh | 17 +++++++++++++++++ wrapper.c | 32 ++++++++++++++++++++++++++++++++ 7 files changed, 72 insertions(+), 27 deletions(-) diff --git a/builtin-pack-objects.c b/builtin-pack-objects.c index fb5e14d..7518d53 100644 --- a/builtin-pack-objects.c +++ b/builtin-pack-objects.c @@ -473,9 +473,8 @@ static void write_pack_file(void) } else { char tmpname[PATH_MAX]; int fd; - snprintf(tmpname, sizeof(tmpname), - "%s/pack/tmp_pack_XXXXXX", get_object_directory()); - fd = xmkstemp(tmpname); + fd = odb_mkstemp(tmpname, sizeof(tmpname), + "pack/tmp_pack_XXXXXX"); pack_tmp_name = xstrdup(tmpname); f = sha1fd(fd, pack_tmp_name); } diff --git a/fast-import.c b/fast-import.c index 5bc9ce2..3f92194 100644 --- a/fast-import.c +++ b/fast-import.c @@ -815,9 +815,8 @@ static void start_packfile(void) struct pack_header hdr; int pack_fd; - snprintf(tmpfile, sizeof(tmpfile), - "%s/pack/tmp_pack_XXXXXX", get_object_directory()); - pack_fd = xmkstemp(tmpfile); + pack_fd = odb_mkstemp(tmpfile, sizeof(tmpfile), + "pack/tmp_pack_XXXXXX"); p = xcalloc(1, sizeof(*p) + strlen(tmpfile) + 2); strcpy(p->pack_name, tmpfile); p->pack_fd = pack_fd; @@ -877,9 +876,8 @@ static char *create_index(void) c = next; } - snprintf(tmpfile, sizeof(tmpfile), - "%s/pack/tmp_idx_XXXXXX", get_object_directory()); - idx_fd = xmkstemp(tmpfile); + idx_fd = odb_mkstemp(tmpfile, sizeof(tmpfile), + "pack/tmp_idx_XXXXXX"); f = sha1fd(idx_fd, tmpfile); sha1write(f, array, 256 * sizeof(int)); SHA1_Init(&ctx); @@ -905,9 +903,7 @@ static char *keep_pack(char *curr_index_name) chmod(pack_data->pack_name, 0444); chmod(curr_index_name, 0444); - snprintf(name, sizeof(name), "%s/pack/pack-%s.keep", - get_object_directory(), sha1_to_hex(pack_data->sha1)); - keep_fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600); + keep_fd = odb_pack_keep(name, sizeof(name), pack_data->sha1); if (keep_fd < 0) die("cannot create keep file"); write_or_die(keep_fd, keep_msg, strlen(keep_msg)); diff --git a/git-compat-util.h b/git-compat-util.h index cf89cdf..758a880 100644 --- a/git-compat-util.h +++ b/git-compat-util.h @@ -294,6 +294,8 @@ extern ssize_t xwrite(int fd, const void *buf, size_t len); extern int xdup(int fd); extern FILE *xfdopen(int fd, const char *mode); extern int xmkstemp(char *template); +extern int odb_mkstemp(char *template, size_t limit, const char *pattern); +extern int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1); static inline size_t xsize_t(off_t len) { diff --git a/index-pack.c b/index-pack.c index c99a1a1..745ac0b 100644 --- a/index-pack.c +++ b/index-pack.c @@ -171,9 +171,8 @@ static char *open_pack_file(char *pack_name) input_fd = 0; if (!pack_name) { static char tmpfile[PATH_MAX]; - snprintf(tmpfile, sizeof(tmpfile), - "%s/pack/tmp_pack_XXXXXX", get_object_directory()); - output_fd = xmkstemp(tmpfile); + output_fd = odb_mkstemp(tmpfile, sizeof(tmpfile), + "pack/tmp_pack_XXXXXX"); pack_name = xstrdup(tmpfile); } else output_fd = open(pack_name, O_CREAT|O_EXCL|O_RDWR, 0600); @@ -795,22 +794,24 @@ static void final(const char *final_pack_name, const char *curr_pack_name, if (keep_msg) { int keep_fd, keep_msg_len = strlen(keep_msg); - if (!keep_name) { - snprintf(name, sizeof(name), "%s/pack/pack-%s.keep", - get_object_directory(), sha1_to_hex(sha1)); - keep_name = name; - } - keep_fd = open(keep_name, O_RDWR|O_CREAT|O_EXCL, 0600); + + if (!keep_name) + keep_fd = odb_pack_keep(name, sizeof(name), sha1); + else + keep_fd = open(keep_name, O_RDWR|O_CREAT|O_EXCL, 0600); + if (keep_fd < 0) { if (errno != EEXIST) - die("cannot write keep file"); + die("cannot write keep file '%s' (%s)", + keep_name, strerror(errno)); } else { if (keep_msg_len > 0) { write_or_die(keep_fd, keep_msg, keep_msg_len); write_or_die(keep_fd, "\n", 1); } if (close(keep_fd) != 0) - die("cannot write keep file"); + die("cannot close written keep file '%s' (%s)", + keep_name, strerror(errno)); report = "keep"; } } diff --git a/pack-write.c b/pack-write.c index 3621f1d..e82c025 100644 --- a/pack-write.c +++ b/pack-write.c @@ -44,9 +44,7 @@ char *write_idx_file(char *index_name, struct pack_idx_entry **objects, if (!index_name) { static char tmpfile[PATH_MAX]; - snprintf(tmpfile, sizeof(tmpfile), - "%s/pack/tmp_idx_XXXXXX", get_object_directory()); - fd = xmkstemp(tmpfile); + fd = odb_mkstemp(tmpfile, sizeof(tmpfile), "pack/tmp_idx_XXXXXX"); index_name = xstrdup(tmpfile); } else { unlink(index_name); @@ -239,7 +237,7 @@ char *index_pack_lockfile(int ip_out) char packname[46]; /* - * The first thing we expects from index-pack's output + * The first thing we expect from index-pack's output * is "pack\t%40s\n" or "keep\t%40s\n" (46 bytes) where * %40s is the newly created pack SHA1 name. In the "keep" * case, we need it to remove the corresponding .keep file diff --git a/t/t5300-pack-object.sh b/t/t5300-pack-object.sh index 2852a03..73d871c 100755 --- a/t/t5300-pack-object.sh +++ b/t/t5300-pack-object.sh @@ -180,6 +180,23 @@ test_expect_success \ unset GIT_OBJECT_DIRECTORY +test_expect_success 'survive missing objects/pack directory' ' + ( + rm -fr missing-pack && + mkdir missing-pack && + cd missing-pack && + git init && + GOP=.git/objects/pack + rm -fr $GOP && + git index-pack --stdin --keep=test <../test-3-${packname_3}.pack && + test -f $GOP/pack-${packname_3}.pack && + test_cmp $GOP/pack-${packname_3}.pack ../test-3-${packname_3}.pack && + test -f $GOP/pack-${packname_3}.idx && + test_cmp $GOP/pack-${packname_3}.idx ../test-3-${packname_3}.idx && + test -f $GOP/pack-${packname_3}.keep + ) +' + test_expect_success \ 'verify pack' \ 'git verify-pack test-1-${packname_1}.idx \ diff --git a/wrapper.c b/wrapper.c index 93562f0..231a58f 100644 --- a/wrapper.c +++ b/wrapper.c @@ -196,3 +196,35 @@ int xmkstemp(char *template) die("Unable to create temporary file: %s", strerror(errno)); return fd; } + +int odb_mkstemp(char *template, size_t limit, const char *pattern) +{ + int fd; + + snprintf(template, limit, "%s/%s", + get_object_directory(), pattern); + fd = mkstemp(template); + if (0 <= fd) + return fd; + + /* slow path */ + safe_create_leading_directories(template); + snprintf(template, limit, "%s/%s", + get_object_directory(), pattern); + return xmkstemp(template); +} + +int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1) +{ + int fd; + + snprintf(name, namesz, "%s/pack/pack-%s.keep", + get_object_directory(), sha1_to_hex(sha1)); + fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600); + if (0 <= fd) + return fd; + + /* slow path */ + safe_create_leading_directories(name); + return open(name, O_RDWR|O_CREAT|O_EXCL, 0600); +} -- 1.6.2.rc1.113.ga620b -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
