From 336226c259f3fa2e2c9c1f5ce857f0c163b26928 Mon Sep 17 00:00:00 2001 From: Jeff King Date: Fri, 5 Apr 2019 14:03:41 -0400 Subject: packfile.h: drop extern from function declarations As CodingGuidelines recommends, we do not need an "extern" when declaring a public function. Let's drop these. Note that we leave the extern on report_garbage(), as that is actually a function pointer, not a function itself. Signed-off-by: Jeff King Signed-off-by: Junio C Hamano --- packfile.h | 82 +++++++++++++++++++++++++++++++------------------------------- 1 file changed, 41 insertions(+), 41 deletions(-) (limited to 'packfile.h') diff --git a/packfile.h b/packfile.h index d70c6d9afb..ea7a690fc6 100644 --- a/packfile.h +++ b/packfile.h @@ -15,23 +15,23 @@ struct object_info; * * Example: odb_pack_name(out, sha1, "idx") => ".git/objects/pack/pack-1234..idx" */ -extern char *odb_pack_name(struct strbuf *buf, const unsigned char *sha1, const char *ext); +char *odb_pack_name(struct strbuf *buf, const unsigned char *sha1, const char *ext); /* * Return the name of the (local) packfile with the specified sha1 in * its name. The return value is a pointer to memory that is * overwritten each time this function is called. */ -extern char *sha1_pack_name(const unsigned char *sha1); +char *sha1_pack_name(const unsigned char *sha1); /* * Return the name of the (local) pack index file with the specified * sha1 in its name. The return value is a pointer to memory that is * overwritten each time this function is called. */ -extern char *sha1_pack_index_name(const unsigned char *sha1); +char *sha1_pack_index_name(const unsigned char *sha1); -extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path); +struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path); typedef void each_file_in_pack_dir_fn(const char *full_path, size_t full_path_len, const char *file_pach, void *data); @@ -45,8 +45,8 @@ void for_each_file_in_pack_dir(const char *objdir, #define PACKDIR_FILE_GARBAGE 4 extern void (*report_garbage)(unsigned seen_bits, const char *path); -extern void reprepare_packed_git(struct repository *r); -extern void install_packed_git(struct repository *r, struct packed_git *pack); +void reprepare_packed_git(struct repository *r); +void install_packed_git(struct repository *r, struct packed_git *pack); struct packed_git *get_packed_git(struct repository *r); struct list_head *get_packed_git_mru(struct repository *r); @@ -59,32 +59,32 @@ struct packed_git *get_all_packs(struct repository *r); */ unsigned long approximate_object_count(void); -extern struct packed_git *find_sha1_pack(const unsigned char *sha1, - struct packed_git *packs); +struct packed_git *find_sha1_pack(const unsigned char *sha1, + struct packed_git *packs); -extern void pack_report(void); +void pack_report(void); /* * mmap the index file for the specified packfile (if it is not * already mmapped). Return 0 on success. */ -extern int open_pack_index(struct packed_git *); +int open_pack_index(struct packed_git *); /* * munmap the index file for the specified packfile (if it is * currently mmapped). */ -extern void close_pack_index(struct packed_git *); +void close_pack_index(struct packed_git *); -extern uint32_t get_pack_fanout(struct packed_git *p, uint32_t value); +uint32_t get_pack_fanout(struct packed_git *p, uint32_t value); -extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *); -extern void close_pack_windows(struct packed_git *); -extern void close_pack(struct packed_git *); -extern void close_all_packs(struct raw_object_store *o); -extern void unuse_pack(struct pack_window **); -extern void clear_delta_base_cache(void); -extern struct packed_git *add_packed_git(const char *path, size_t path_len, int local); +unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *); +void close_pack_windows(struct packed_git *); +void close_pack(struct packed_git *); +void close_all_packs(struct raw_object_store *o); +void unuse_pack(struct pack_window **); +void clear_delta_base_cache(void); +struct packed_git *add_packed_git(const char *path, size_t path_len, int local); /* * Make sure that a pointer access into an mmap'd index file is within bounds, @@ -94,7 +94,7 @@ extern struct packed_git *add_packed_git(const char *path, size_t path_len, int * (like the 64-bit extended offset table), as we compare the size to the * fixed-length parts when we open the file. */ -extern void check_pack_index_ptr(const struct packed_git *p, const void *ptr); +void check_pack_index_ptr(const struct packed_git *p, const void *ptr); /* * Perform binary search on a pack-index for a given oid. Packfile is expected to @@ -110,59 +110,59 @@ int bsearch_pack(const struct object_id *oid, const struct packed_git *p, uint32 * at the SHA-1 within the mmapped index. Return NULL if there is an * error. */ -extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t n); +const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t n); /* * Like nth_packed_object_sha1, but write the data into the object specified by * the the first argument. Returns the first argument on success, and NULL on * error. */ -extern const struct object_id *nth_packed_object_oid(struct object_id *, struct packed_git *, uint32_t n); +const struct object_id *nth_packed_object_oid(struct object_id *, struct packed_git *, uint32_t n); /* * Return the offset of the nth object within the specified packfile. * The index must already be opened. */ -extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t n); +off_t nth_packed_object_offset(const struct packed_git *, uint32_t n); /* * If the object named sha1 is present in the specified packfile, * return its offset within the packfile; otherwise, return 0. */ -extern off_t find_pack_entry_one(const unsigned char *sha1, struct packed_git *); +off_t find_pack_entry_one(const unsigned char *sha1, struct packed_git *); -extern int is_pack_valid(struct packed_git *); -extern void *unpack_entry(struct repository *r, struct packed_git *, off_t, enum object_type *, unsigned long *); -extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep); -extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t); -extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *); +int is_pack_valid(struct packed_git *); +void *unpack_entry(struct repository *r, struct packed_git *, off_t, enum object_type *, unsigned long *); +unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep); +unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t); +int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *); -extern void release_pack_memory(size_t); +void release_pack_memory(size_t); /* global flag to enable extra checks when accessing packed objects */ extern int do_check_packed_object_crc; -extern int packed_object_info(struct repository *r, - struct packed_git *pack, - off_t offset, struct object_info *); +int packed_object_info(struct repository *r, + struct packed_git *pack, + off_t offset, struct object_info *); -extern void mark_bad_packed_object(struct packed_git *p, const unsigned char *sha1); -extern const struct packed_git *has_packed_and_bad(struct repository *r, const unsigned char *sha1); +void mark_bad_packed_object(struct packed_git *p, const unsigned char *sha1); +const struct packed_git *has_packed_and_bad(struct repository *r, const unsigned char *sha1); /* * Iff a pack file in the given repository contains the object named by sha1, * return true and store its location to e. */ -extern int find_pack_entry(struct repository *r, const struct object_id *oid, struct pack_entry *e); +int find_pack_entry(struct repository *r, const struct object_id *oid, struct pack_entry *e); -extern int has_object_pack(const struct object_id *oid); +int has_object_pack(const struct object_id *oid); -extern int has_pack_index(const unsigned char *sha1); +int has_pack_index(const unsigned char *sha1); /* * Return 1 if an object in a promisor packfile is or refers to the given * object, 0 otherwise. */ -extern int is_promisor_object(const struct object_id *oid); +int is_promisor_object(const struct object_id *oid); /* * Expose a function for fuzz testing. @@ -174,7 +174,7 @@ extern int is_promisor_object(const struct object_id *oid); * have a convenient entry-point for fuzz testing. For real uses, you should * probably use open_pack_index() or parse_pack_index() instead. */ -extern int load_idx(const char *path, const unsigned int hashsz, void *idx_map, - size_t idx_size, struct packed_git *p); +int load_idx(const char *path, const unsigned int hashsz, void *idx_map, + size_t idx_size, struct packed_git *p); #endif -- cgit v1.3-5-g9baa From fc78915674ff1bca1726348d7c434dfa0048a5d7 Mon Sep 17 00:00:00 2001 From: Jeff King Date: Fri, 5 Apr 2019 14:06:22 -0400 Subject: packfile: fix pack basename computation When we have a multi-pack-index that covers many packfiles, we try to avoid opening the .idx for those packfiles. To do that we feed the pack name to midx_contains_pack(). But that function wants to see only the basename, which we compute using strrchr() to find the final slash. But that leaves an extra "/" at the start of our string. We can fix this by incrementing the pointer. That also raises the question of what to do when the name does not have a '/' at all. This should generally not happen (we always find files in "pack/"), but it doesn't hurt to be defensive here. Let's wrap all of that up in a helper function and make it publicly available, since a later patch will need to use it, too. The tests don't notice because there's nothing about opening those .idx files that would cause us to give incorrect output. It's just a little slower. The new test checks this case by corrupting the covered .idx, and then making sure we don't complain about it. We also have to tweak t5570, which intentionally corrupts a .idx file and expects us to notice it. When run with GIT_TEST_MULTI_PACK_INDEX, this will fail since we now will (correctly) not bother opening the .idx at all. We can fix that by unconditionally dropping any midx that's there, which ensures we'll have to read the .idx. Signed-off-by: Jeff King Signed-off-by: Junio C Hamano --- packfile.c | 12 +++++++++++- packfile.h | 6 ++++++ t/t5319-multi-pack-index.sh | 14 ++++++++++++++ t/t5570-git-daemon.sh | 1 + 4 files changed, 32 insertions(+), 1 deletion(-) (limited to 'packfile.h') diff --git a/packfile.c b/packfile.c index 6e40bd89c7..7a2dd2fdbe 100644 --- a/packfile.c +++ b/packfile.c @@ -466,6 +466,16 @@ static unsigned int get_max_fd_limit(void) #endif } +const char *pack_basename(struct packed_git *p) +{ + const char *ret = strrchr(p->pack_name, '/'); + if (ret) + ret = ret + 1; /* skip past slash */ + else + ret = p->pack_name; /* we only have a base */ + return ret; +} + /* * Do not call this directly as this leaks p->pack_fd on error return; * call open_packed_git() instead. @@ -482,7 +492,7 @@ static int open_packed_git_1(struct packed_git *p) if (!p->index_data) { struct multi_pack_index *m; - const char *pack_name = strrchr(p->pack_name, '/'); + const char *pack_name = pack_basename(p); for (m = the_repository->objects->multi_pack_index; m; m = m->next) { diff --git a/packfile.h b/packfile.h index ea7a690fc6..fe05fe0303 100644 --- a/packfile.h +++ b/packfile.h @@ -31,6 +31,12 @@ char *sha1_pack_name(const unsigned char *sha1); */ char *sha1_pack_index_name(const unsigned char *sha1); +/* + * Return the basename of the packfile, omitting any containing directory + * (e.g., "pack-1234abcd[...].pack"). + */ +const char *pack_basename(struct packed_git *p); + struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path); typedef void each_file_in_pack_dir_fn(const char *full_path, size_t full_path_len, diff --git a/t/t5319-multi-pack-index.sh b/t/t5319-multi-pack-index.sh index 8c4d2bd849..1ebf19ec3c 100755 --- a/t/t5319-multi-pack-index.sh +++ b/t/t5319-multi-pack-index.sh @@ -117,6 +117,20 @@ test_expect_success 'write midx with one v2 pack' ' compare_results_with_midx "one v2 pack" +test_expect_success 'corrupt idx not opened' ' + idx=$(test-tool read-midx $objdir | grep "\.idx\$") && + mv $objdir/pack/$idx backup-$idx && + test_when_finished "mv backup-\$idx \$objdir/pack/\$idx" && + + # This is the minimum size for a sha-1 based .idx; this lets + # us pass perfunctory tests, but anything that actually opens and reads + # the idx file will complain. + test_copy_bytes 1064 $objdir/pack/$idx && + + git -c core.multiPackIndex=true rev-list --objects --all 2>err && + test_must_be_empty err +' + test_expect_success 'add more objects' ' for i in $(test_seq 6 10) do diff --git a/t/t5570-git-daemon.sh b/t/t5570-git-daemon.sh index 58ee787685..19e271bda6 100755 --- a/t/t5570-git-daemon.sh +++ b/t/t5570-git-daemon.sh @@ -90,6 +90,7 @@ test_expect_success 'fetch notices corrupt pack' ' test_expect_success 'fetch notices corrupt idx' ' cp -R "$GIT_DAEMON_DOCUMENT_ROOT_PATH"/repo_pack.git "$GIT_DAEMON_DOCUMENT_ROOT_PATH"/repo_bad2.git && (cd "$GIT_DAEMON_DOCUMENT_ROOT_PATH"/repo_bad2.git && + rm -f objects/pack/multi-pack-index && p=$(ls objects/pack/pack-*.idx) && chmod u+w $p && printf %0256d 0 | dd of=$p bs=256 count=1 seek=1 conv=notrunc -- cgit v1.3-5-g9baa