Merge branch 'ds/write-index-with-hashfile-api'
Use the hashfile API in the codepath that writes the index file to reduce code duplication. * ds/write-index-with-hashfile-api: read-cache: delete unused hashing methods read-cache: use hashfile instead of git_hash_ctx csum-file.h: increase hashfile buffer size hashfile: use write_in_full()
This commit is contained in:
Junio C Hamano
commit
0dd2fd18f8
@ -58,9 +58,11 @@ void add_chunk(struct chunkfile *cf,
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int write_chunkfile(struct chunkfile *cf, void *data)
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{
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int i;
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int i, result = 0;
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uint64_t cur_offset = hashfile_total(cf->f);
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trace2_region_enter("chunkfile", "write", the_repository);
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/* Add the table of contents to the current offset */
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cur_offset += (cf->chunks_nr + 1) * CHUNK_TOC_ENTRY_SIZE;
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@ -77,10 +79,10 @@ int write_chunkfile(struct chunkfile *cf, void *data)
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for (i = 0; i < cf->chunks_nr; i++) {
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off_t start_offset = hashfile_total(cf->f);
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int result = cf->chunks[i].write_fn(cf->f, data);
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result = cf->chunks[i].write_fn(cf->f, data);
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if (result)
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return result;
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goto cleanup;
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if (hashfile_total(cf->f) - start_offset != cf->chunks[i].size)
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BUG("expected to write %"PRId64" bytes to chunk %"PRIx32", but wrote %"PRId64" instead",
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@ -88,7 +90,9 @@ int write_chunkfile(struct chunkfile *cf, void *data)
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hashfile_total(cf->f) - start_offset);
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}
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return 0;
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cleanup:
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trace2_region_leave("chunkfile", "write", the_repository);
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return result;
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}
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int read_table_of_contents(struct chunkfile *cf,
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94
csum-file.c
94
csum-file.c
@ -11,35 +11,33 @@
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#include "progress.h"
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#include "csum-file.h"
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static void verify_buffer_or_die(struct hashfile *f,
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const void *buf,
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unsigned int count)
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{
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ssize_t ret = read_in_full(f->check_fd, f->check_buffer, count);
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if (ret < 0)
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die_errno("%s: sha1 file read error", f->name);
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if (ret != count)
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die("%s: sha1 file truncated", f->name);
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if (memcmp(buf, f->check_buffer, count))
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die("sha1 file '%s' validation error", f->name);
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}
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static void flush(struct hashfile *f, const void *buf, unsigned int count)
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{
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if (0 <= f->check_fd && count) {
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unsigned char check_buffer[8192];
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ssize_t ret = read_in_full(f->check_fd, check_buffer, count);
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if (0 <= f->check_fd && count)
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verify_buffer_or_die(f, buf, count);
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if (ret < 0)
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die_errno("%s: sha1 file read error", f->name);
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if (ret != count)
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die("%s: sha1 file truncated", f->name);
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if (memcmp(buf, check_buffer, count))
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die("sha1 file '%s' validation error", f->name);
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}
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for (;;) {
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int ret = xwrite(f->fd, buf, count);
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if (ret > 0) {
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f->total += ret;
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display_throughput(f->tp, f->total);
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buf = (char *) buf + ret;
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count -= ret;
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if (count)
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continue;
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return;
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}
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if (!ret)
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if (write_in_full(f->fd, buf, count) < 0) {
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if (errno == ENOSPC)
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die("sha1 file '%s' write error. Out of diskspace", f->name);
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die_errno("sha1 file '%s' write error", f->name);
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}
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f->total += count;
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display_throughput(f->tp, f->total);
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}
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void hashflush(struct hashfile *f)
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@ -53,6 +51,13 @@ void hashflush(struct hashfile *f)
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}
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}
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static void free_hashfile(struct hashfile *f)
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{
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free(f->buffer);
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free(f->check_buffer);
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free(f);
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}
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int finalize_hashfile(struct hashfile *f, unsigned char *result, unsigned int flags)
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{
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int fd;
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@ -82,20 +87,20 @@ int finalize_hashfile(struct hashfile *f, unsigned char *result, unsigned int fl
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if (close(f->check_fd))
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die_errno("%s: sha1 file error on close", f->name);
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}
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free(f);
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free_hashfile(f);
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return fd;
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}
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void hashwrite(struct hashfile *f, const void *buf, unsigned int count)
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{
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while (count) {
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unsigned left = sizeof(f->buffer) - f->offset;
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unsigned left = f->buffer_len - f->offset;
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unsigned nr = count > left ? left : count;
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if (f->do_crc)
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f->crc32 = crc32(f->crc32, buf, nr);
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if (nr == sizeof(f->buffer)) {
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if (nr == f->buffer_len) {
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/*
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* Flush a full batch worth of data directly
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* from the input, skipping the memcpy() to
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@ -121,11 +126,6 @@ void hashwrite(struct hashfile *f, const void *buf, unsigned int count)
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}
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}
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struct hashfile *hashfd(int fd, const char *name)
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{
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return hashfd_throughput(fd, name, NULL);
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}
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struct hashfile *hashfd_check(const char *name)
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{
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int sink, check;
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@ -139,10 +139,14 @@ struct hashfile *hashfd_check(const char *name)
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die_errno("unable to open '%s'", name);
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f = hashfd(sink, name);
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f->check_fd = check;
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f->check_buffer = xmalloc(f->buffer_len);
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return f;
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}
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struct hashfile *hashfd_throughput(int fd, const char *name, struct progress *tp)
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static struct hashfile *hashfd_internal(int fd, const char *name,
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struct progress *tp,
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size_t buffer_len)
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{
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struct hashfile *f = xmalloc(sizeof(*f));
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f->fd = fd;
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@ -153,9 +157,35 @@ struct hashfile *hashfd_throughput(int fd, const char *name, struct progress *tp
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f->name = name;
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f->do_crc = 0;
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the_hash_algo->init_fn(&f->ctx);
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f->buffer_len = buffer_len;
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f->buffer = xmalloc(buffer_len);
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f->check_buffer = NULL;
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return f;
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}
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struct hashfile *hashfd(int fd, const char *name)
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{
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/*
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* Since we are not going to use a progress meter to
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* measure the rate of data passing through this hashfile,
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* use a larger buffer size to reduce fsync() calls.
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*/
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return hashfd_internal(fd, name, NULL, 128 * 1024);
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}
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struct hashfile *hashfd_throughput(int fd, const char *name, struct progress *tp)
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{
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/*
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* Since we are expecting to report progress of the
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* write into this hashfile, use a smaller buffer
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* size so the progress indicators arrive at a more
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* frequent rate.
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*/
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return hashfd_internal(fd, name, tp, 8 * 1024);
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}
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void hashfile_checkpoint(struct hashfile *f, struct hashfile_checkpoint *checkpoint)
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{
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hashflush(f);
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@ -16,7 +16,9 @@ struct hashfile {
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const char *name;
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int do_crc;
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uint32_t crc32;
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unsigned char buffer[8192];
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size_t buffer_len;
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unsigned char *buffer;
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unsigned char *check_buffer;
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};
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/* Checkpoint */
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193
read-cache.c
193
read-cache.c
@ -26,6 +26,7 @@
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#include "thread-utils.h"
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#include "progress.h"
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#include "sparse-index.h"
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#include "csum-file.h"
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/* Mask for the name length in ce_flags in the on-disk index */
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@ -2521,80 +2522,23 @@ int repo_index_has_changes(struct repository *repo,
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}
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}
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#define WRITE_BUFFER_SIZE (128 * 1024)
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static unsigned char write_buffer[WRITE_BUFFER_SIZE];
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static unsigned long write_buffer_len;
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static int ce_write_flush(git_hash_ctx *context, int fd)
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static int write_index_ext_header(struct hashfile *f,
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git_hash_ctx *eoie_f,
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unsigned int ext,
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unsigned int sz)
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{
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unsigned int buffered = write_buffer_len;
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if (buffered) {
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the_hash_algo->update_fn(context, write_buffer, buffered);
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if (write_in_full(fd, write_buffer, buffered) < 0)
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return -1;
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write_buffer_len = 0;
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hashwrite_be32(f, ext);
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hashwrite_be32(f, sz);
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if (eoie_f) {
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ext = htonl(ext);
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sz = htonl(sz);
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the_hash_algo->update_fn(eoie_f, &ext, sizeof(ext));
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the_hash_algo->update_fn(eoie_f, &sz, sizeof(sz));
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}
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return 0;
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}
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static int ce_write(git_hash_ctx *context, int fd, void *data, unsigned int len)
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{
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while (len) {
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unsigned int buffered = write_buffer_len;
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unsigned int partial = WRITE_BUFFER_SIZE - buffered;
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if (partial > len)
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partial = len;
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memcpy(write_buffer + buffered, data, partial);
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buffered += partial;
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if (buffered == WRITE_BUFFER_SIZE) {
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write_buffer_len = buffered;
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if (ce_write_flush(context, fd))
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return -1;
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buffered = 0;
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}
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write_buffer_len = buffered;
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len -= partial;
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data = (char *) data + partial;
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}
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return 0;
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}
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static int write_index_ext_header(git_hash_ctx *context, git_hash_ctx *eoie_context,
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int fd, unsigned int ext, unsigned int sz)
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{
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ext = htonl(ext);
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sz = htonl(sz);
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if (eoie_context) {
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the_hash_algo->update_fn(eoie_context, &ext, 4);
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the_hash_algo->update_fn(eoie_context, &sz, 4);
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}
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return ((ce_write(context, fd, &ext, 4) < 0) ||
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(ce_write(context, fd, &sz, 4) < 0)) ? -1 : 0;
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}
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static int ce_flush(git_hash_ctx *context, int fd, unsigned char *hash)
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{
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unsigned int left = write_buffer_len;
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if (left) {
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write_buffer_len = 0;
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the_hash_algo->update_fn(context, write_buffer, left);
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}
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/* Flush first if not enough space for hash signature */
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if (left + the_hash_algo->rawsz > WRITE_BUFFER_SIZE) {
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if (write_in_full(fd, write_buffer, left) < 0)
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return -1;
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left = 0;
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}
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/* Append the hash signature at the end */
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the_hash_algo->final_fn(write_buffer + left, context);
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hashcpy(hash, write_buffer + left);
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left += the_hash_algo->rawsz;
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return (write_in_full(fd, write_buffer, left) < 0) ? -1 : 0;
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}
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static void ce_smudge_racily_clean_entry(struct index_state *istate,
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struct cache_entry *ce)
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{
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@ -2673,11 +2617,10 @@ static void copy_cache_entry_to_ondisk(struct ondisk_cache_entry *ondisk,
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}
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}
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static int ce_write_entry(git_hash_ctx *c, int fd, struct cache_entry *ce,
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static int ce_write_entry(struct hashfile *f, struct cache_entry *ce,
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struct strbuf *previous_name, struct ondisk_cache_entry *ondisk)
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{
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int size;
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int result;
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unsigned int saved_namelen;
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int stripped_name = 0;
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static unsigned char padding[8] = { 0x00 };
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@ -2693,11 +2636,9 @@ static int ce_write_entry(git_hash_ctx *c, int fd, struct cache_entry *ce,
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if (!previous_name) {
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int len = ce_namelen(ce);
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copy_cache_entry_to_ondisk(ondisk, ce);
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result = ce_write(c, fd, ondisk, size);
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if (!result)
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result = ce_write(c, fd, ce->name, len);
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if (!result)
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result = ce_write(c, fd, padding, align_padding_size(size, len));
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hashwrite(f, ondisk, size);
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hashwrite(f, ce->name, len);
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hashwrite(f, padding, align_padding_size(size, len));
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} else {
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int common, to_remove, prefix_size;
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unsigned char to_remove_vi[16];
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@ -2711,13 +2652,10 @@ static int ce_write_entry(git_hash_ctx *c, int fd, struct cache_entry *ce,
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prefix_size = encode_varint(to_remove, to_remove_vi);
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copy_cache_entry_to_ondisk(ondisk, ce);
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result = ce_write(c, fd, ondisk, size);
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if (!result)
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result = ce_write(c, fd, to_remove_vi, prefix_size);
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if (!result)
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result = ce_write(c, fd, ce->name + common, ce_namelen(ce) - common);
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if (!result)
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result = ce_write(c, fd, padding, 1);
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hashwrite(f, ondisk, size);
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hashwrite(f, to_remove_vi, prefix_size);
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hashwrite(f, ce->name + common, ce_namelen(ce) - common);
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hashwrite(f, padding, 1);
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strbuf_splice(previous_name, common, to_remove,
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ce->name + common, ce_namelen(ce) - common);
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@ -2727,7 +2665,7 @@ static int ce_write_entry(git_hash_ctx *c, int fd, struct cache_entry *ce,
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ce->ce_flags &= ~CE_STRIP_NAME;
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}
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return result;
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return 0;
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}
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/*
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@ -2839,8 +2777,8 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
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int strip_extensions)
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{
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uint64_t start = getnanotime();
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int newfd = tempfile->fd;
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git_hash_ctx c, eoie_c;
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struct hashfile *f;
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git_hash_ctx *eoie_c = NULL;
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struct cache_header hdr;
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int i, err = 0, removed, extended, hdr_version;
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struct cache_entry **cache = istate->cache;
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@ -2854,6 +2792,8 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
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struct index_entry_offset_table *ieot = NULL;
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int nr, nr_threads;
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f = hashfd(tempfile->fd, tempfile->filename.buf);
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for (i = removed = extended = 0; i < entries; i++) {
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if (cache[i]->ce_flags & CE_REMOVE)
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removed++;
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@ -2882,9 +2822,7 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
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hdr.hdr_version = htonl(hdr_version);
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hdr.hdr_entries = htonl(entries - removed);
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the_hash_algo->init_fn(&c);
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if (ce_write(&c, newfd, &hdr, sizeof(hdr)) < 0)
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return -1;
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hashwrite(f, &hdr, sizeof(hdr));
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if (!HAVE_THREADS || git_config_get_index_threads(&nr_threads))
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nr_threads = 1;
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@ -2919,12 +2857,8 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
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}
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}
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offset = lseek(newfd, 0, SEEK_CUR);
|
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if (offset < 0) {
|
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free(ieot);
|
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return -1;
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}
|
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offset += write_buffer_len;
|
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offset = hashfile_total(f);
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nr = 0;
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previous_name = (hdr_version == 4) ? &previous_name_buf : NULL;
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@ -2959,14 +2893,10 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
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if (previous_name)
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previous_name->buf[0] = 0;
|
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nr = 0;
|
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offset = lseek(newfd, 0, SEEK_CUR);
|
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if (offset < 0) {
|
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free(ieot);
|
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return -1;
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}
|
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offset += write_buffer_len;
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|
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offset = hashfile_total(f);
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}
|
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if (ce_write_entry(&c, newfd, ce, previous_name, (struct ondisk_cache_entry *)&ondisk) < 0)
|
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if (ce_write_entry(f, ce, previous_name, (struct ondisk_cache_entry *)&ondisk) < 0)
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err = -1;
|
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|
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if (err)
|
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@ -2985,14 +2915,16 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
|
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return err;
|
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}
|
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|
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/* Write extension data here */
|
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offset = lseek(newfd, 0, SEEK_CUR);
|
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if (offset < 0) {
|
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free(ieot);
|
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return -1;
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offset = hashfile_total(f);
|
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|
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/*
|
||||
* The extension headers must be hashed on their own for the
|
||||
* EOIE extension. Create a hashfile here to compute that hash.
|
||||
*/
|
||||
if (offset && record_eoie()) {
|
||||
CALLOC_ARRAY(eoie_c, 1);
|
||||
the_hash_algo->init_fn(eoie_c);
|
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}
|
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offset += write_buffer_len;
|
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the_hash_algo->init_fn(&eoie_c);
|
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|
||||
/*
|
||||
* Lets write out CACHE_EXT_INDEXENTRYOFFSETTABLE first so that we
|
||||
@ -3005,8 +2937,8 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
|
||||
struct strbuf sb = STRBUF_INIT;
|
||||
|
||||
write_ieot_extension(&sb, ieot);
|
||||
err = write_index_ext_header(&c, &eoie_c, newfd, CACHE_EXT_INDEXENTRYOFFSETTABLE, sb.len) < 0
|
||||
|| ce_write(&c, newfd, sb.buf, sb.len) < 0;
|
||||
err = write_index_ext_header(f, eoie_c, CACHE_EXT_INDEXENTRYOFFSETTABLE, sb.len) < 0;
|
||||
hashwrite(f, sb.buf, sb.len);
|
||||
strbuf_release(&sb);
|
||||
free(ieot);
|
||||
if (err)
|
||||
@ -3018,9 +2950,9 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
|
||||
struct strbuf sb = STRBUF_INIT;
|
||||
|
||||
err = write_link_extension(&sb, istate) < 0 ||
|
||||
write_index_ext_header(&c, &eoie_c, newfd, CACHE_EXT_LINK,
|
||||
sb.len) < 0 ||
|
||||
ce_write(&c, newfd, sb.buf, sb.len) < 0;
|
||||
write_index_ext_header(f, eoie_c, CACHE_EXT_LINK,
|
||||
sb.len) < 0;
|
||||
hashwrite(f, sb.buf, sb.len);
|
||||
strbuf_release(&sb);
|
||||
if (err)
|
||||
return -1;
|
||||
@ -3029,8 +2961,8 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
|
||||
struct strbuf sb = STRBUF_INIT;
|
||||
|
||||
cache_tree_write(&sb, istate->cache_tree);
|
||||
err = write_index_ext_header(&c, &eoie_c, newfd, CACHE_EXT_TREE, sb.len) < 0
|
||||
|| ce_write(&c, newfd, sb.buf, sb.len) < 0;
|
||||
err = write_index_ext_header(f, eoie_c, CACHE_EXT_TREE, sb.len) < 0;
|
||||
hashwrite(f, sb.buf, sb.len);
|
||||
strbuf_release(&sb);
|
||||
if (err)
|
||||
return -1;
|
||||
@ -3039,9 +2971,9 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
|
||||
struct strbuf sb = STRBUF_INIT;
|
||||
|
||||
resolve_undo_write(&sb, istate->resolve_undo);
|
||||
err = write_index_ext_header(&c, &eoie_c, newfd, CACHE_EXT_RESOLVE_UNDO,
|
||||
sb.len) < 0
|
||||
|| ce_write(&c, newfd, sb.buf, sb.len) < 0;
|
||||
err = write_index_ext_header(f, eoie_c, CACHE_EXT_RESOLVE_UNDO,
|
||||
sb.len) < 0;
|
||||
hashwrite(f, sb.buf, sb.len);
|
||||
strbuf_release(&sb);
|
||||
if (err)
|
||||
return -1;
|
||||
@ -3050,9 +2982,9 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
|
||||
struct strbuf sb = STRBUF_INIT;
|
||||
|
||||
write_untracked_extension(&sb, istate->untracked);
|
||||
err = write_index_ext_header(&c, &eoie_c, newfd, CACHE_EXT_UNTRACKED,
|
||||
sb.len) < 0 ||
|
||||
ce_write(&c, newfd, sb.buf, sb.len) < 0;
|
||||
err = write_index_ext_header(f, eoie_c, CACHE_EXT_UNTRACKED,
|
||||
sb.len) < 0;
|
||||
hashwrite(f, sb.buf, sb.len);
|
||||
strbuf_release(&sb);
|
||||
if (err)
|
||||
return -1;
|
||||
@ -3061,14 +2993,14 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
|
||||
struct strbuf sb = STRBUF_INIT;
|
||||
|
||||
write_fsmonitor_extension(&sb, istate);
|
||||
err = write_index_ext_header(&c, &eoie_c, newfd, CACHE_EXT_FSMONITOR, sb.len) < 0
|
||||
|| ce_write(&c, newfd, sb.buf, sb.len) < 0;
|
||||
err = write_index_ext_header(f, eoie_c, CACHE_EXT_FSMONITOR, sb.len) < 0;
|
||||
hashwrite(f, sb.buf, sb.len);
|
||||
strbuf_release(&sb);
|
||||
if (err)
|
||||
return -1;
|
||||
}
|
||||
if (istate->sparse_index) {
|
||||
if (write_index_ext_header(&c, &eoie_c, newfd, CACHE_EXT_SPARSE_DIRECTORIES, 0) < 0)
|
||||
if (write_index_ext_header(f, eoie_c, CACHE_EXT_SPARSE_DIRECTORIES, 0) < 0)
|
||||
return -1;
|
||||
}
|
||||
|
||||
@ -3078,19 +3010,18 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
|
||||
* read. Write it out regardless of the strip_extensions parameter as we need it
|
||||
* when loading the shared index.
|
||||
*/
|
||||
if (offset && record_eoie()) {
|
||||
if (eoie_c) {
|
||||
struct strbuf sb = STRBUF_INIT;
|
||||
|
||||
write_eoie_extension(&sb, &eoie_c, offset);
|
||||
err = write_index_ext_header(&c, NULL, newfd, CACHE_EXT_ENDOFINDEXENTRIES, sb.len) < 0
|
||||
|| ce_write(&c, newfd, sb.buf, sb.len) < 0;
|
||||
write_eoie_extension(&sb, eoie_c, offset);
|
||||
err = write_index_ext_header(f, NULL, CACHE_EXT_ENDOFINDEXENTRIES, sb.len) < 0;
|
||||
hashwrite(f, sb.buf, sb.len);
|
||||
strbuf_release(&sb);
|
||||
if (err)
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (ce_flush(&c, newfd, istate->oid.hash))
|
||||
return -1;
|
||||
finalize_hashfile(f, istate->oid.hash, CSUM_HASH_IN_STREAM);
|
||||
if (close_tempfile_gently(tempfile)) {
|
||||
error(_("could not close '%s'"), get_tempfile_path(tempfile));
|
||||
return -1;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user