Replace slow pipe with direct memory copy for archive extraction.
Miscellaneous corrections and tweaks.
This commit is contained in:
Moinak Ghosh
parent
7ed532133e
commit
448890a014
4 changed files with 177 additions and 24 deletions
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@ -95,7 +95,7 @@ pthread_mutex_t nftw_mutex = PTHREAD_MUTEX_INITIALIZER;
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* Archive writer callback routines for archive creation operation.
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*/
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static int
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creat_open_callback(struct archive *arc, void *ctx)
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arc_open_callback(struct archive *arc, void *ctx)
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{
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pc_ctx_t *pctx = (pc_ctx_t *)ctx;
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@ -201,13 +201,79 @@ archiver_close(void *ctx)
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pc_ctx_t *pctx = (pc_ctx_t *)ctx;
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pctx->arc_closed = 1;
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pctx->arc_buf = NULL;
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pctx->arc_buf_size = 0;
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sem_post(&(pctx->write_sem));
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sem_post(&(pctx->read_sem));
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return (0);
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}
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static int
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extract_close_callback(struct archive *arc, void *ctx)
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{
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pc_ctx_t *pctx = (pc_ctx_t *)ctx;
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pctx->arc_closed = 1;
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if (pctx->arc_buf) {
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sem_post(&(pctx->write_sem));
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} else {
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pctx->arc_buf_size = 0;
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}
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return (ARCHIVE_OK);
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}
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static ssize_t
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extract_read_callback(struct archive *arc, void *ctx, const void **buf)
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{
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pc_ctx_t *pctx = (pc_ctx_t *)ctx;
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if (pctx->arc_closed) {
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pctx->arc_buf_size = 0;
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archive_set_error(arc, ARCHIVE_EOF, "End of file.");
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return (0);
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}
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if (!pctx->arc_writing) {
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sem_wait(&(pctx->read_sem));
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} else {
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sem_post(&(pctx->write_sem));
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sem_wait(&(pctx->read_sem));
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}
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if (pctx->arc_buf == NULL || pctx->arc_buf_size == 0) {
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pctx->arc_buf_size = 0;
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archive_set_error(arc, ARCHIVE_EOF, "End of file when extracting archive.");
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return (0);
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}
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pctx->arc_writing = 1;
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*buf = pctx->arc_buf;
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return (pctx->arc_buf_size);
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}
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int64_t
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archiver_write(void *ctx, void *buf, uint64_t count)
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{
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pc_ctx_t *pctx = (pc_ctx_t *)ctx;
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if (pctx->arc_closed)
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return (0);
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if (pctx->arc_buf != NULL) {
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log_msg(LOG_ERR, 0, "Incorrect sequencing of archiver_read() call.");
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return (-1);
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}
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pctx->arc_buf = buf;
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pctx->arc_buf_size = count;
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sem_post(&(pctx->read_sem));
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sem_wait(&(pctx->write_sem));
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pctx->arc_buf = NULL;
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return (pctx->arc_buf_size);
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}
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/*
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* Comparison function for sorting pathname mambers. Sort by name/extension and then
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* Comparison function for sorting pathname members. Sort by name/extension and then
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* by size.
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*/
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static int
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@ -255,7 +321,7 @@ compare_members_lt(member_entry_t *mem1, member_entry_t *mem2) {
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* fetches the next entry in ascending order of the predetermined sort keys.
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*/
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static int
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read_next_path(pc_ctx_t *pctx, char *fpath)
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read_next_path(pc_ctx_t *pctx, char *fpath, char **namechars)
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{
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short namelen;
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ssize_t rbytes;
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@ -300,6 +366,10 @@ read_next_path(pc_ctx_t *pctx, char *fpath)
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pctx->temp_file_pos = mem1->file_pos;
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}
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/*
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* Increment popped position of the current buffer and check if it is empty.
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* The empty buffer is freed and is taken out of the linked list of buffers.
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*/
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srt1->pos++;
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if (srt1->pos > srt1->max) {
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if (srt1 == pctx->archive_sort_buf) {
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@ -317,7 +387,7 @@ read_next_path(pc_ctx_t *pctx, char *fpath)
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* new mmap.
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*/
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if (pctx->temp_mmap_len > 0) {
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int retried;
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int retried, n;
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if (pctx->temp_file_pos < pctx->temp_mmap_pos ||
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pctx->temp_file_pos - pctx->temp_mmap_pos > pctx->temp_mmap_len ||
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@ -364,6 +434,12 @@ do_mmap:
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buf = pctx->temp_mmap_buf + (pctx->temp_file_pos - pctx->temp_mmap_pos);
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memcpy(fpath, buf, namelen);
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fpath[namelen] = '\0';
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n = namelen-1;
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while (fpath[n] == '/' && n > 0) n--;
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while (fpath[n] != '/' && fpath[n] != '\\' && n > 0) n--;
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*namechars = &fpath[n+1];
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pctx->temp_file_pos += namelen;
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return (namelen);
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}
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@ -646,7 +722,7 @@ setup_archiver(pc_ctx_t *pctx, struct stat *sbuf)
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return (-1);
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}
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archive_write_set_format_pax_restricted(arc);
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archive_write_open(arc, pctx, creat_open_callback,
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archive_write_open(arc, pctx, arc_open_callback,
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creat_write_callback, creat_close_callback);
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pctx->archive_ctx = arc;
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pctx->archive_members_fd = fd;
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@ -677,9 +753,6 @@ setup_extractor(pc_ctx_t *pctx)
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return (-1);
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}
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pctx->uncompfd = pipefd[1]; // Write side
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pctx->archive_data_fd = pipefd[0]; // Read side
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arc = archive_read_new();
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if (!arc) {
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log_msg(LOG_ERR, 1, "Unable to create libarchive context.\n");
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@ -782,12 +855,13 @@ write_entry(pc_ctx_t *pctx, struct archive *arc, struct archive *in_arc,
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static void *
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archiver_thread_func(void *dat) {
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pc_ctx_t *pctx = (pc_ctx_t *)dat;
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char fpath[PATH_MAX], *name;
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char fpath[PATH_MAX], *name, *bnchars = NULL; // Silence compiler
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int warn, rbytes;
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uint32_t ctr;
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struct archive_entry *entry, *spare_entry, *ent;
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struct archive *arc, *ard;
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struct archive_entry_linkresolver *resolver;
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int readdisk_flags;
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warn = 1;
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entry = archive_entry_new();
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@ -800,14 +874,18 @@ archiver_thread_func(void *dat) {
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}
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ctr = 1;
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readdisk_flags = ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS;
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readdisk_flags |= ARCHIVE_READDISK_HONOR_NODUMP;
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ard = archive_read_disk_new();
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archive_read_disk_set_behavior(ard, readdisk_flags);
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archive_read_disk_set_standard_lookup(ard);
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archive_read_disk_set_symlink_physical(ard);
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/*
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* Read next path entry from list file. read_next_path() also handles sorted reading.
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*/
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while ((rbytes = read_next_path(pctx, fpath)) != 0) {
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while ((rbytes = read_next_path(pctx, fpath, &bnchars)) != 0) {
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if (rbytes == -1) break;
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archive_entry_copy_sourcepath(entry, fpath);
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if (archive_read_disk_entry_from_file(ard, entry, -1, NULL) != ARCHIVE_OK) {
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@ -831,6 +909,29 @@ archiver_thread_func(void *dat) {
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name += 1;
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}
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}
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#ifndef __APPLE__
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/*
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* Workaround for libarchive weirdness on Non MAC OS X platforms. The files
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* with names matching pattern: ._* are MAC OS X resource forks which contain
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* extended attributes, ACLs etc. They should be handled accordingly on MAC
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* platforms and treated as normal files on others. For some reason beyond me
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* libarchive refuses to extract these files on Linux, no matter what I try.
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* Bug?
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*
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* In this case the file basename is changed and a custom extended attribute
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* is set to indicate extraction to change it back.
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*/
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if (bnchars[0] == '.' && bnchars[1] == '_') {
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char *pos = strstr(name, "._");
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char name[] = "@.", value[] = "m";
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if (pos) {
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*pos = '|';
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archive_entry_xattr_add_entry(entry, name, value, strlen(value));
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}
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}
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#endif
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if (name != archive_entry_pathname(entry))
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archive_entry_copy_pathname(entry, name);
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@ -862,7 +963,6 @@ done:
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archive_read_free(ard);
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archive_write_free(arc);
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close(pctx->archive_members_fd);
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close(pctx->archive_data_fd);
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unlink(pctx->archive_members_file);
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return (NULL);
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}
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@ -886,9 +986,21 @@ extractor_thread_func(void *dat) {
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struct archive *awd, *arc;
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flags = ARCHIVE_EXTRACT_TIME;
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flags |= ARCHIVE_EXTRACT_PERM;
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flags |= ARCHIVE_EXTRACT_ACL;
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flags |= ARCHIVE_EXTRACT_FFLAGS;
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flags |= ARCHIVE_EXTRACT_SECURE_SYMLINKS;
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flags |= ARCHIVE_EXTRACT_SECURE_NODOTDOT;
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flags |= ARCHIVE_EXTRACT_SPARSE;
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if (pctx->force_archive_perms || geteuid() == 0) {
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flags |= ARCHIVE_EXTRACT_OWNER;
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flags |= ARCHIVE_EXTRACT_PERM;
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flags |= ARCHIVE_EXTRACT_ACL;
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flags |= ARCHIVE_EXTRACT_XATTR;
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flags |= ARCHIVE_EXTRACT_FFLAGS;
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flags |= ARCHIVE_EXTRACT_MAC_METADATA;
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}
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if (pctx->no_overwrite_newer)
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flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
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got_cwd = 1;
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if (getcwd(cwd, PATH_MAX) == NULL) {
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@ -906,12 +1018,15 @@ extractor_thread_func(void *dat) {
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archive_write_disk_set_options(awd, flags);
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archive_write_disk_set_standard_lookup(awd);
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arc = (struct archive *)(pctx->archive_ctx);
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archive_read_open_fd(arc, pctx->archive_data_fd, MMAP_SIZE);
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archive_read_open(arc, pctx, arc_open_callback, extract_read_callback, extract_close_callback);
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/*
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* Read archive entries and extract to disk.
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*/
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while ((rv = archive_read_next_header(arc, &entry)) != ARCHIVE_EOF) {
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const char *xt_name, *xt_value;
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size_t xt_size;
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if (rv != ARCHIVE_OK)
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log_msg(LOG_WARN, 0, "%s", archive_error_string(arc));
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@ -925,6 +1040,29 @@ extractor_thread_func(void *dat) {
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continue;
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}
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/*
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* Workaround for libarchive weirdness on Non MAC OS X platforms for filenames
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* starting with '._'. See above ...
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*/
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#ifndef __APPLE__
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if (archive_entry_xattr_reset(entry) > 0) {
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while (archive_entry_xattr_next(entry, &xt_name, (const void **)&xt_value,
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&xt_size) == ARCHIVE_OK) {
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if (xt_name[0] == '@' && xt_name[1] == '.' && xt_value[0] == 'm') {
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const char *name;
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char *pos;
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name = archive_entry_pathname(entry);
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pos = strstr(name, "|_");
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if (pos) {
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*pos = '.';
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archive_entry_set_pathname(entry, name);
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}
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break;
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}
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}
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}
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#endif
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rv = archive_read_extract2(arc, entry, awd);
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if (rv != ARCHIVE_OK) {
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log_msg(LOG_WARN, 0, "%s: %s", archive_entry_pathname(entry),
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@ -948,7 +1086,6 @@ extractor_thread_func(void *dat) {
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archive_read_free(arc);
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archive_write_free(awd);
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done:
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close(pctx->archive_data_fd);
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return (NULL);
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}
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@ -46,6 +46,7 @@ int start_archiver(pc_ctx_t *pctx);
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int setup_extractor(pc_ctx_t *pctx);
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int start_extractor(pc_ctx_t *pctx);
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int64_t archiver_read(void *ctx, void *buf, uint64_t count);
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int64_t archiver_write(void *ctx, void *buf, uint64_t count);
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int archiver_close(void *ctx);
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#ifdef __cplusplus
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26
pcompress.c
26
pcompress.c
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@ -1127,11 +1127,11 @@ start_decompress(pc_ctx_t *pctx, const char *filename, char *to_filename)
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}
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add_fname(pctx->archive_temp_file);
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}
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uncompfd = -1;
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if (setup_extractor(pctx) == -1) {
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log_msg(LOG_ERR, 0, "Setup of extraction context failed.");
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UNCOMP_BAIL;
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}
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uncompfd = pctx->uncompfd;
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if (start_extractor(pctx) == -1) {
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log_msg(LOG_ERR, 0, "Unable to start extraction thread.");
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@ -1402,7 +1402,7 @@ uncomp_done:
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/*
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* Ownership and mode of target should be same as original.
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*/
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if (filename != NULL) {
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if (filename != NULL && uncompfd != -1) {
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fchmod(uncompfd, sbuf.st_mode);
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if (fchown(uncompfd, sbuf.st_uid, sbuf.st_gid) == -1)
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log_msg(LOG_ERR, 1, "Chown ");
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@ -1737,12 +1737,17 @@ repeat:
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pctx->avg_chunk += tdat->len_cmp;
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}
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wbytes = Write(w->wfd, tdat->cmp_seg, tdat->len_cmp);
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if (pctx->archive_mode && tdat->decompressing) {
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wbytes = archiver_write(pctx, tdat->cmp_seg, tdat->len_cmp);
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} else {
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wbytes = Write(w->wfd, tdat->cmp_seg, tdat->len_cmp);
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}
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if (pctx->archive_temp_fd != -1 && wbytes == tdat->len_cmp) {
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wbytes = Write(pctx->archive_temp_fd, tdat->cmp_seg, tdat->len_cmp);
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}
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if (unlikely(wbytes != tdat->len_cmp)) {
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log_msg(LOG_ERR, 1, "Chunk Write: ");
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log_msg(LOG_ERR, 1, "Chunk Write (expected: %" PRIu64 ", written: %" PRIu64 ") : ",
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tdat->len_cmp, wbytes);
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do_cancel:
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pctx->main_cancel = 1;
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tdat->cancel = 1;
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@ -2720,7 +2725,7 @@ init_pc_context(pc_ctx_t *pctx, int argc, char *argv[])
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strcpy(pctx->exec_name, pos);
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pthread_mutex_lock(&opt_parse);
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while ((opt = getopt(argc, argv, "dc:s:l:pt:MCDGEe:w:rLPS:B:Fk:avn")) != -1) {
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while ((opt = getopt(argc, argv, "dc:s:l:pt:MCDGEe:w:LPS:B:Fk:avnmK")) != -1) {
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int ovr;
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int64_t chunksize;
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@ -2865,6 +2870,14 @@ init_pc_context(pc_ctx_t *pctx, int argc, char *argv[])
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pctx->enable_archive_sort = -1;
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break;
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case 'm':
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pctx->force_archive_perms = 1;
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break;
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case 'K':
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pctx->no_overwrite_newer = 1;
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break;
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case '?':
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default:
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return (2);
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@ -2972,8 +2985,9 @@ init_pc_context(pc_ctx_t *pctx, int argc, char *argv[])
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char *filename;
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if ((filename = realpath(argv[my_optind], NULL)) != NULL) {
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free(filename);
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*fn = slab_alloc(NULL, sizeof (struct fn_list));
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(*fn)->filename = filename;
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(*fn)->filename = strdup(argv[my_optind]);
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(*fn)->next = NULL;
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fn = &((*fn)->next);
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valid_paths++;
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@ -202,13 +202,14 @@ typedef struct pc_ctx {
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int verbose;
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int enable_archive_sort;
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int pagesize;
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int uncompfd, compfd;
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int force_archive_perms;
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int no_overwrite_newer;
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/*
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* Archiving related context data.
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*/
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char archive_members_file[MAXPATHLEN];
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int archive_members_fd, archive_data_fd;
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int archive_members_fd;
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uint32_t archive_members_count;
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void *archive_ctx, *archive_sort_buf;
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pthread_t archive_thread;
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