From: Jonathan Tan <jonathantanmy@google.com>
To: git@vger.kernel.org
Cc: Jonathan Tan <jonathantanmy@google.com>, gitster@pobox.com
Subject: [PATCH v3 04/23] pack: move open_pack_index(), parse_pack_index()
Date: Fri, 18 Aug 2017 15:20:19 -0700 [thread overview]
Message-ID: <2e70949481a9e5b3fc906a6346f10ddd4046f33e.1503094448.git.jonathantanmy@google.com> (raw)
In-Reply-To: <cover.1503094448.git.jonathantanmy@google.com>
In-Reply-To: <cover.1503094448.git.jonathantanmy@google.com>
alloc_packed_git() in packfile.c is duplicated from sha1_file.c. In a
subsequent commit, alloc_packed_git() will be removed from sha1_file.c.
Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
---
builtin/count-objects.c | 1 +
builtin/fsck.c | 1 +
builtin/pack-objects.c | 1 +
cache.h | 8 ---
pack-bitmap.c | 1 +
pack-check.c | 1 +
packfile.c | 149 ++++++++++++++++++++++++++++++++++++++++++++++++
packfile.h | 8 +++
sha1_file.c | 140 ---------------------------------------------
sha1_name.c | 1 +
10 files changed, 163 insertions(+), 148 deletions(-)
diff --git a/builtin/count-objects.c b/builtin/count-objects.c
index 1d82e61f2..33343818c 100644
--- a/builtin/count-objects.c
+++ b/builtin/count-objects.c
@@ -10,6 +10,7 @@
#include "builtin.h"
#include "parse-options.h"
#include "quote.h"
+#include "packfile.h"
static unsigned long garbage;
static off_t size_garbage;
diff --git a/builtin/fsck.c b/builtin/fsck.c
index 99dea7adf..c56207b21 100644
--- a/builtin/fsck.c
+++ b/builtin/fsck.c
@@ -15,6 +15,7 @@
#include "progress.h"
#include "streaming.h"
#include "decorate.h"
+#include "packfile.h"
#define REACHABLE 0x0001
#define SEEN 0x0002
diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index 5c5d3d507..08f05cb84 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -25,6 +25,7 @@
#include "sha1-array.h"
#include "argv-array.h"
#include "mru.h"
+#include "packfile.h"
static const char *pack_usage[] = {
N_("git pack-objects --stdout [<options>...] [< <ref-list> | < <object-list>]"),
diff --git a/cache.h b/cache.h
index a0497d469..f271033db 100644
--- a/cache.h
+++ b/cache.h
@@ -1611,8 +1611,6 @@ struct pack_entry {
struct packed_git *p;
};
-extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
-
/* A hook to report invalid files in pack directory */
#define PACKDIR_FILE_PACK 1
#define PACKDIR_FILE_IDX 2
@@ -1647,12 +1645,6 @@ extern int odb_mkstemp(struct strbuf *template, const char *pattern);
*/
extern int odb_pack_keep(const char *name);
-/*
- * 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 *);
-
/*
* munmap the index file for the specified packfile (if it is
* currently mmapped).
diff --git a/pack-bitmap.c b/pack-bitmap.c
index 327634cd7..cb3d14ba4 100644
--- a/pack-bitmap.c
+++ b/pack-bitmap.c
@@ -9,6 +9,7 @@
#include "pack-bitmap.h"
#include "pack-revindex.h"
#include "pack-objects.h"
+#include "packfile.h"
/*
* An entry on the bitmap index, representing the bitmap for a given
diff --git a/pack-check.c b/pack-check.c
index 84469168a..2086f5bb7 100644
--- a/pack-check.c
+++ b/pack-check.c
@@ -2,6 +2,7 @@
#include "pack.h"
#include "pack-revindex.h"
#include "progress.h"
+#include "packfile.h"
struct idx_entry {
off_t offset;
diff --git a/packfile.c b/packfile.c
index 60d9fc3b0..6edc43228 100644
--- a/packfile.c
+++ b/packfile.c
@@ -1,5 +1,6 @@
#include "cache.h"
#include "mru.h"
+#include "pack.h"
char *odb_pack_name(struct strbuf *buf,
const unsigned char *sha1,
@@ -59,3 +60,151 @@ void pack_report(void)
pack_open_windows, peak_pack_open_windows,
sz_fmt(pack_mapped), sz_fmt(peak_pack_mapped));
}
+
+/*
+ * Open and mmap the index file at path, perform a couple of
+ * consistency checks, then record its information to p. Return 0 on
+ * success.
+ */
+static int check_packed_git_idx(const char *path, struct packed_git *p)
+{
+ void *idx_map;
+ struct pack_idx_header *hdr;
+ size_t idx_size;
+ uint32_t version, nr, i, *index;
+ int fd = git_open(path);
+ struct stat st;
+
+ if (fd < 0)
+ return -1;
+ if (fstat(fd, &st)) {
+ close(fd);
+ return -1;
+ }
+ idx_size = xsize_t(st.st_size);
+ if (idx_size < 4 * 256 + 20 + 20) {
+ close(fd);
+ return error("index file %s is too small", path);
+ }
+ idx_map = xmmap(NULL, idx_size, PROT_READ, MAP_PRIVATE, fd, 0);
+ close(fd);
+
+ hdr = idx_map;
+ if (hdr->idx_signature == htonl(PACK_IDX_SIGNATURE)) {
+ version = ntohl(hdr->idx_version);
+ if (version < 2 || version > 2) {
+ munmap(idx_map, idx_size);
+ return error("index file %s is version %"PRIu32
+ " and is not supported by this binary"
+ " (try upgrading GIT to a newer version)",
+ path, version);
+ }
+ } else
+ version = 1;
+
+ nr = 0;
+ index = idx_map;
+ if (version > 1)
+ index += 2; /* skip index header */
+ for (i = 0; i < 256; i++) {
+ uint32_t n = ntohl(index[i]);
+ if (n < nr) {
+ munmap(idx_map, idx_size);
+ return error("non-monotonic index %s", path);
+ }
+ nr = n;
+ }
+
+ if (version == 1) {
+ /*
+ * Total size:
+ * - 256 index entries 4 bytes each
+ * - 24-byte entries * nr (20-byte sha1 + 4-byte offset)
+ * - 20-byte SHA1 of the packfile
+ * - 20-byte SHA1 file checksum
+ */
+ if (idx_size != 4*256 + nr * 24 + 20 + 20) {
+ munmap(idx_map, idx_size);
+ return error("wrong index v1 file size in %s", path);
+ }
+ } else if (version == 2) {
+ /*
+ * Minimum size:
+ * - 8 bytes of header
+ * - 256 index entries 4 bytes each
+ * - 20-byte sha1 entry * nr
+ * - 4-byte crc entry * nr
+ * - 4-byte offset entry * nr
+ * - 20-byte SHA1 of the packfile
+ * - 20-byte SHA1 file checksum
+ * And after the 4-byte offset table might be a
+ * variable sized table containing 8-byte entries
+ * for offsets larger than 2^31.
+ */
+ unsigned long min_size = 8 + 4*256 + nr*(20 + 4 + 4) + 20 + 20;
+ unsigned long max_size = min_size;
+ if (nr)
+ max_size += (nr - 1)*8;
+ if (idx_size < min_size || idx_size > max_size) {
+ munmap(idx_map, idx_size);
+ return error("wrong index v2 file size in %s", path);
+ }
+ if (idx_size != min_size &&
+ /*
+ * make sure we can deal with large pack offsets.
+ * 31-bit signed offset won't be enough, neither
+ * 32-bit unsigned one will be.
+ */
+ (sizeof(off_t) <= 4)) {
+ munmap(idx_map, idx_size);
+ return error("pack too large for current definition of off_t in %s", path);
+ }
+ }
+
+ p->index_version = version;
+ p->index_data = idx_map;
+ p->index_size = idx_size;
+ p->num_objects = nr;
+ return 0;
+}
+
+int open_pack_index(struct packed_git *p)
+{
+ char *idx_name;
+ size_t len;
+ int ret;
+
+ if (p->index_data)
+ return 0;
+
+ if (!strip_suffix(p->pack_name, ".pack", &len))
+ die("BUG: pack_name does not end in .pack");
+ idx_name = xstrfmt("%.*s.idx", (int)len, p->pack_name);
+ ret = check_packed_git_idx(idx_name, p);
+ free(idx_name);
+ return ret;
+}
+
+static struct packed_git *alloc_packed_git(int extra)
+{
+ struct packed_git *p = xmalloc(st_add(sizeof(*p), extra));
+ memset(p, 0, sizeof(*p));
+ p->pack_fd = -1;
+ return p;
+}
+
+struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path)
+{
+ const char *path = sha1_pack_name(sha1);
+ size_t alloc = st_add(strlen(path), 1);
+ struct packed_git *p = alloc_packed_git(alloc);
+
+ memcpy(p->pack_name, path, alloc); /* includes NUL */
+ hashcpy(p->sha1, sha1);
+ if (check_packed_git_idx(idx_path, p)) {
+ free(p);
+ return NULL;
+ }
+
+ return p;
+}
diff --git a/packfile.h b/packfile.h
index bfa94c8fe..703887d41 100644
--- a/packfile.h
+++ b/packfile.h
@@ -33,6 +33,14 @@ extern unsigned int pack_max_fds;
extern size_t peak_pack_mapped;
extern size_t pack_mapped;
+extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
+
extern 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 *);
+
#endif
diff --git a/sha1_file.c b/sha1_file.c
index f7c8152ac..475d2032d 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -680,130 +680,6 @@ static int has_loose_object(const unsigned char *sha1)
return check_and_freshen(sha1, 0);
}
-/*
- * Open and mmap the index file at path, perform a couple of
- * consistency checks, then record its information to p. Return 0 on
- * success.
- */
-static int check_packed_git_idx(const char *path, struct packed_git *p)
-{
- void *idx_map;
- struct pack_idx_header *hdr;
- size_t idx_size;
- uint32_t version, nr, i, *index;
- int fd = git_open(path);
- struct stat st;
-
- if (fd < 0)
- return -1;
- if (fstat(fd, &st)) {
- close(fd);
- return -1;
- }
- idx_size = xsize_t(st.st_size);
- if (idx_size < 4 * 256 + 20 + 20) {
- close(fd);
- return error("index file %s is too small", path);
- }
- idx_map = xmmap(NULL, idx_size, PROT_READ, MAP_PRIVATE, fd, 0);
- close(fd);
-
- hdr = idx_map;
- if (hdr->idx_signature == htonl(PACK_IDX_SIGNATURE)) {
- version = ntohl(hdr->idx_version);
- if (version < 2 || version > 2) {
- munmap(idx_map, idx_size);
- return error("index file %s is version %"PRIu32
- " and is not supported by this binary"
- " (try upgrading GIT to a newer version)",
- path, version);
- }
- } else
- version = 1;
-
- nr = 0;
- index = idx_map;
- if (version > 1)
- index += 2; /* skip index header */
- for (i = 0; i < 256; i++) {
- uint32_t n = ntohl(index[i]);
- if (n < nr) {
- munmap(idx_map, idx_size);
- return error("non-monotonic index %s", path);
- }
- nr = n;
- }
-
- if (version == 1) {
- /*
- * Total size:
- * - 256 index entries 4 bytes each
- * - 24-byte entries * nr (20-byte sha1 + 4-byte offset)
- * - 20-byte SHA1 of the packfile
- * - 20-byte SHA1 file checksum
- */
- if (idx_size != 4*256 + nr * 24 + 20 + 20) {
- munmap(idx_map, idx_size);
- return error("wrong index v1 file size in %s", path);
- }
- } else if (version == 2) {
- /*
- * Minimum size:
- * - 8 bytes of header
- * - 256 index entries 4 bytes each
- * - 20-byte sha1 entry * nr
- * - 4-byte crc entry * nr
- * - 4-byte offset entry * nr
- * - 20-byte SHA1 of the packfile
- * - 20-byte SHA1 file checksum
- * And after the 4-byte offset table might be a
- * variable sized table containing 8-byte entries
- * for offsets larger than 2^31.
- */
- unsigned long min_size = 8 + 4*256 + nr*(20 + 4 + 4) + 20 + 20;
- unsigned long max_size = min_size;
- if (nr)
- max_size += (nr - 1)*8;
- if (idx_size < min_size || idx_size > max_size) {
- munmap(idx_map, idx_size);
- return error("wrong index v2 file size in %s", path);
- }
- if (idx_size != min_size &&
- /*
- * make sure we can deal with large pack offsets.
- * 31-bit signed offset won't be enough, neither
- * 32-bit unsigned one will be.
- */
- (sizeof(off_t) <= 4)) {
- munmap(idx_map, idx_size);
- return error("pack too large for current definition of off_t in %s", path);
- }
- }
-
- p->index_version = version;
- p->index_data = idx_map;
- p->index_size = idx_size;
- p->num_objects = nr;
- return 0;
-}
-
-int open_pack_index(struct packed_git *p)
-{
- char *idx_name;
- size_t len;
- int ret;
-
- if (p->index_data)
- return 0;
-
- if (!strip_suffix(p->pack_name, ".pack", &len))
- die("BUG: pack_name does not end in .pack");
- idx_name = xstrfmt("%.*s.idx", (int)len, p->pack_name);
- ret = check_packed_git_idx(idx_name, p);
- free(idx_name);
- return ret;
-}
-
static void scan_windows(struct packed_git *p,
struct packed_git **lru_p,
struct pack_window **lru_w,
@@ -1301,22 +1177,6 @@ struct packed_git *add_packed_git(const char *path, size_t path_len, int local)
return p;
}
-struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path)
-{
- const char *path = sha1_pack_name(sha1);
- size_t alloc = st_add(strlen(path), 1);
- struct packed_git *p = alloc_packed_git(alloc);
-
- memcpy(p->pack_name, path, alloc); /* includes NUL */
- hashcpy(p->sha1, sha1);
- if (check_packed_git_idx(idx_path, p)) {
- free(p);
- return NULL;
- }
-
- return p;
-}
-
void install_packed_git(struct packed_git *pack)
{
if (pack->pack_fd != -1)
diff --git a/sha1_name.c b/sha1_name.c
index 74fcb6d78..ae237809c 100644
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -9,6 +9,7 @@
#include "remote.h"
#include "dir.h"
#include "sha1-array.h"
+#include "packfile.h"
static int get_sha1_oneline(const char *, unsigned char *, struct commit_list *);
--
2.14.1.480.gb18f417b89-goog
next prev parent reply other threads:[~2017-08-18 22:22 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-08 19:32 [RFC PATCH 00/10] An attempt to move packfile funcs to its own file Jonathan Tan
2017-08-08 19:32 ` [RFC PATCH 01/10] pack: move pack name-related functions Jonathan Tan
2017-08-08 20:36 ` Stefan Beller
2017-08-08 20:50 ` Jonathan Tan
2017-08-09 12:00 ` Christian Couder
2017-08-09 17:16 ` Jonathan Tan
2017-08-11 19:38 ` Ben Peart
2017-08-11 21:34 ` Junio C Hamano
2017-08-16 22:53 ` Jonathan Tan
2017-08-08 19:32 ` [RFC PATCH 02/10] pack: move static state variables Jonathan Tan
2017-08-08 19:32 ` [RFC PATCH 03/10] pack: move pack_report() Jonathan Tan
2017-08-08 19:32 ` [RFC PATCH 04/10] pack: move open_pack_index(), parse_pack_index() Jonathan Tan
2017-08-08 20:19 ` Junio C Hamano
2017-08-08 20:45 ` Jonathan Tan
2017-08-08 19:32 ` [RFC PATCH 05/10] pack: move release_pack_memory() Jonathan Tan
2017-08-08 19:32 ` [RFC PATCH 06/10] pack: move pack-closing functions Jonathan Tan
2017-08-08 19:32 ` [RFC PATCH 07/10] pack: move use_pack() Jonathan Tan
2017-08-08 19:32 ` [RFC PATCH 08/10] pack: move unuse_pack() Jonathan Tan
2017-08-08 19:32 ` [RFC PATCH 09/10] pack: move add_packed_git() Jonathan Tan
2017-08-08 19:32 ` [RFC PATCH 10/10] pack: move install_packed_git() Jonathan Tan
2017-08-08 20:05 ` [RFC PATCH 00/10] An attempt to move packfile funcs to its own file Junio C Hamano
2017-08-08 20:43 ` Jonathan Tan
2017-08-08 21:04 ` Junio C Hamano
2017-08-09 1:22 ` [PATCH v2 00/25] Move exported " Jonathan Tan
2017-08-10 17:21 ` Stefan Beller
2017-08-10 21:19 ` Junio C Hamano
2017-08-10 21:59 ` Jonathan Tan
2017-08-10 22:40 ` Junio C Hamano
2017-08-11 20:36 ` [PATCH 0/2] non-move patches in preparation for packfile.c Jonathan Tan
2017-08-11 20:36 ` [PATCH 1/2] sha1_file: set whence in storage-specific info fn Jonathan Tan
2017-08-11 21:52 ` Junio C Hamano
2017-08-11 20:36 ` [PATCH 2/2] sha1_file: remove read_packed_sha1() Jonathan Tan
2017-08-11 22:06 ` Junio C Hamano
2017-08-11 19:41 ` [PATCH v2 00/25] Move exported packfile funcs to its own file Ben Peart
2017-08-18 23:36 ` Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 01/25] pack: move pack name-related functions Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 02/25] pack: move static state variables Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 03/25] pack: move pack_report() Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 04/25] pack: move open_pack_index(), parse_pack_index() Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 05/25] pack: move release_pack_memory() Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 06/25] pack: move pack-closing functions Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 07/25] pack: move use_pack() Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 08/25] pack: move unuse_pack() Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 09/25] pack: move add_packed_git() Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 10/25] pack: move install_packed_git() Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 11/25] pack: move {,re}prepare_packed_git and approximate_object_count Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 12/25] pack: move unpack_object_header() Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 13/25] pack: move get_size_from_delta() Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 14/25] pack: move unpack_object_header() Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 15/25] sha1_file: set whence in storage-specific info fn Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 16/25] sha1_file: remove read_packed_sha1() Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 17/25] pack: move packed_object_info(), unpack_entry() Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 18/25] pack: move nth_packed_object_{sha1,oid} Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 19/25] pack: move check_pack_index_ptr(), nth_packed_object_offset() Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 20/25] pack: move find_pack_entry_one(), is_pack_valid() Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 21/25] pack: move find_sha1_pack() Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 22/25] pack: move find_pack_entry() and make it global Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 23/25] pack: move has_sha1_pack() Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 24/25] pack: move has_pack_index() Jonathan Tan
2017-08-09 1:22 ` [PATCH v2 25/25] pack: move for_each_packed_object() Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 00/23] Move exported packfile funcs to its own file Jonathan Tan
2017-08-19 7:33 ` Junio C Hamano
2017-08-20 6:40 ` Junio C Hamano
2017-08-21 18:40 ` Jonathan Tan
2017-08-21 22:55 ` Junio C Hamano
2017-08-18 22:20 ` [PATCH v3 01/23] pack: move pack name-related functions Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 02/23] pack: move static state variables Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 03/23] pack: move pack_report() Jonathan Tan
2017-08-18 22:20 ` Jonathan Tan [this message]
2017-08-18 22:20 ` [PATCH v3 05/23] pack: move release_pack_memory() Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 06/23] pack: move pack-closing functions Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 07/23] pack: move use_pack() Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 08/23] pack: move unuse_pack() Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 09/23] pack: move add_packed_git() Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 10/23] pack: move install_packed_git() Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 11/23] pack: move {,re}prepare_packed_git and approximate_object_count Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 12/23] pack: move unpack_object_header_buffer() Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 13/23] pack: move get_size_from_delta() Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 14/23] pack: move unpack_object_header() Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 15/23] pack: move clear_delta_base_cache(), packed_object_info(), unpack_entry() Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 16/23] pack: move nth_packed_object_{sha1,oid} Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 17/23] pack: move check_pack_index_ptr(), nth_packed_object_offset() Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 18/23] pack: move find_pack_entry_one(), is_pack_valid() Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 19/23] pack: move find_sha1_pack() Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 20/23] pack: move find_pack_entry() and make it global Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 21/23] pack: move has_sha1_pack() Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 22/23] pack: move has_pack_index() Jonathan Tan
2017-08-18 22:20 ` [PATCH v3 23/23] pack: move for_each_packed_object() Jonathan Tan
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