void
ct_extract(struct ct_global_state *state, struct ct_op *op)
{
struct ct_extract_args *cea = op->op_args;
const char *ctfile = cea->cea_local_ctfile;
char **filelist = cea->cea_filelist;
int match_mode = cea->cea_matchmode;
struct ct_extract_priv *ex_priv = op->op_priv;
int ret;
struct ct_trans *trans;
char shat[SHA_DIGEST_STRING_LENGTH];
/* if we were woken up due to fatal, just clean up local state */
if (state->ct_dying != 0)
goto dying;
CNDBG(CT_LOG_TRANS, "entry");
switch (ct_get_file_state(state)) {
case CT_S_STARTING:
if (ex_priv == NULL) {
ex_priv = e_calloc(1, sizeof(*ex_priv));
TAILQ_INIT(&ex_priv->extract_head);
if ((ret = ct_match_compile(&ex_priv->inc_match,
match_mode, filelist)) != 0) {
ct_fatal(state,
"failed to compile include pattern", ret);
goto dying;
}
if (cea->cea_excllist != NULL &&
(ret = ct_match_compile(&ex_priv->ex_match,
match_mode, cea->cea_excllist)) != 0) {
ct_fatal(state,
"failed to compile exclude pattern", ret);
goto dying;
}
op->op_priv = ex_priv;
RB_INIT(&ex_priv->pending_tree);
}
if ((ret = ct_file_extract_init(&state->extract_state,
cea->cea_tdir, cea->cea_attr, cea->cea_follow_symlinks,
ex_priv->allfiles, cea->cea_log_state,
cea->cea_log_chown_failed)) != 0) {
ct_fatal(state, "Can not initialize extract state",
ret);
goto dying;
}
if (ct_extract_calculate_total(state, cea, ex_priv->inc_match,
ex_priv->ex_match) != 0) {
CWARNX("failed to calculate stats");
goto dying;
}
if ((ret = ct_extract_setup(&ex_priv->extract_head,
&ex_priv->xdr_ctx, ctfile, cea->cea_ctfile_basedir,
&ex_priv->allfiles)) != 0) {
ct_fatal(state, "can't setup extract queue", ret);
goto dying;
}
state->ct_print_ctfile_info(state->ct_print_state,
ex_priv->xdr_ctx.xs_filename, &ex_priv->xdr_ctx.xs_gh);
/* XXX we should handle this better */
if (state->ct_max_block_size <
ex_priv->xdr_ctx.xs_gh.cmg_chunk_size)
CABORTX("block size negotiated with server %d is "
"smaller than file max block size %d",
state->ct_max_block_size,
ex_priv->xdr_ctx.xs_gh.cmg_chunk_size);
/* create rb tree head, prepare to start inserting */
if (ex_priv->allfiles) {
ex_priv->fillrb = 1;
}
break;
case CT_S_FINISHED:
return;
default:
break;
}
ct_set_file_state(state, CT_S_RUNNING);
while (1) {
trans = ct_trans_alloc(state);
if (trans == NULL) {
/* system busy, return */
CNDBG(CT_LOG_TRANS, "ran out of transactions, waiting");
ct_set_file_state(state, CT_S_WAITING_TRANS);
return;
}
trans->tr_statemachine = ct_state_extract;
switch ((ret = ctfile_parse(&ex_priv->xdr_ctx))) {
case XS_RET_FILE:
if (ex_priv->fillrb == 0 &&
ex_priv->xdr_ctx.xs_hdr.cmh_nr_shas == -1) {
if (ex_priv->allfiles == 0)
CINFO("file %s has negative shas "
"and backup is not allfiles",
ex_priv->xdr_ctx.xs_hdr.cmh_filename);
ex_priv->doextract = 0;
goto skip; /* skip ze file for now */
}
trans = ct_trans_realloc_local(state, trans);
trans->tr_fl_node = ex_priv->fl_ex_node =
ct_alloc_fnode();
ct_populate_fnode(state->extract_state,
&ex_priv->xdr_ctx, trans->tr_fl_node,
&trans->tr_state, ex_priv->allfiles,
cea->cea_strip_slash);
if (trans->tr_state == TR_S_EX_SPECIAL) {
trans->tr_complete =
ct_extract_complete_special;
} else {
trans->tr_complete =
ct_extract_complete_file_start;
}
trans->tr_cleanup = ct_extract_cleanup_fnode;
if (ex_priv->haverb) {
struct ct_pending_file *cpf;
if ((cpf = ct_extract_find_entry(
&ex_priv->pending_tree,
trans->tr_fl_node->fn_fullname)) != NULL) {
struct fnode *hardlink;
/* copy permissions over */
trans->tr_fl_node->fn_uid =
cpf->cpf_uid;
trans->tr_fl_node->fn_gid =
cpf->cpf_gid;
trans->tr_fl_node->fn_mode =
cpf->cpf_mode;
trans->tr_fl_node->fn_mtime =
cpf->cpf_mtime;
trans->tr_fl_node->fn_atime =
cpf->cpf_atime;
/* copy list of pending links over */
while ((hardlink =
TAILQ_FIRST(&cpf->cpf_links))) {
TAILQ_REMOVE(&cpf->cpf_links,
hardlink, fn_list);
TAILQ_INSERT_TAIL(
&trans->tr_fl_node->fn_hardlinks,
hardlink, fn_list);
}
ex_priv->doextract = 1;
ct_extract_free_entry(
&ex_priv->pending_tree, cpf);
} else {
ex_priv->doextract = 0;
}
} else {
ex_priv->doextract =
!ct_match(ex_priv->inc_match,
trans->tr_fl_node->fn_fullname);
if (ex_priv->doextract &&
ex_priv->ex_match != NULL &&
!ct_match(ex_priv->ex_match,
trans->tr_fl_node->fn_fullname)) {
ex_priv->doextract = 0;
}
}
if (ex_priv->doextract &&
trans->tr_fl_node->fn_hardlink) {
struct ct_pending_file *file;
if ((file = ct_extract_find_entry(
&ex_priv->pending_tree,
trans->tr_fl_node->fn_hlname)) != NULL) {
CNDBG(CT_LOG_FILE,
"adding pending link for %s to %s",
file->cpf_name,
trans->tr_fl_node->fn_fullname);
/* our reference to node passed */
ct_pending_file_add_link(file,
trans->tr_fl_node);
ex_priv->doextract = 0;
goto skip;
}
}
/*
* If we're on the first ctfile in an allfiles backup
* put the matches with -1 on the rb tree so we'll
* remember to extract it from older files.
*/
if (ex_priv->doextract == 1 && ex_priv->fillrb &&
ex_priv->xdr_ctx.xs_hdr.cmh_nr_shas == -1) {
ct_extract_insert_entry(&ex_priv->pending_tree,
trans->tr_fl_node);
ex_priv->doextract = 0;
/* XXX reconsider the freeing */
}
if (ex_priv->doextract == 0) {
ct_free_fnode(trans->tr_fl_node);
skip:
ex_priv->fl_ex_node = NULL;
ct_trans_free(state, trans);
continue;
}
CNDBG(CT_LOG_CTFILE,
"file %s numshas %" PRId64,
trans->tr_fl_node->fn_fullname,
ex_priv->xdr_ctx.xs_hdr.cmh_nr_shas);
/*
* special files we give our refcount up
* regular files we need a new one since we need to
* keep ours.
*/
if (trans->tr_state != TR_S_EX_SPECIAL) {
ct_ref_fnode(trans->tr_fl_node);
} else {
ex_priv->fl_ex_node = NULL;
}
ct_queue_first(state, trans);
break;
case XS_RET_SHA:
if (ex_priv->doextract == 0 ||
ex_priv->fl_ex_node->fn_skip_file != 0) {
if (ctfile_parse_seek(&ex_priv->xdr_ctx)) {
ct_fatal(state, "Can't seek past shas",
ex_priv->xdr_ctx.xs_errno);
goto dying;
}
ct_trans_free(state, trans);
continue;
}
/* use saved fnode */
trans->tr_fl_node = ex_priv->fl_ex_node;
if (memcmp(zerosha, ex_priv->xdr_ctx.xs_sha,
SHA_DIGEST_LENGTH) == 0) {
CWARNX("\"%s\" truncated during backup",
trans->tr_fl_node->fn_fullname);
if (ctfile_parse_seek(&ex_priv->xdr_ctx)) {
ct_fatal(state, "Can't seek past "
"truncation shas",
ex_priv->xdr_ctx.xs_errno);
goto dying;
}
ct_trans_free(state, trans);
continue;
}
if (ex_priv->xdr_ctx.xs_gh.cmg_flags & CT_MD_CRYPTO) {
/*
* yes csha and sha are reversed, we want
* to download csha, but putting it in sha
* simplifies the code
*/
bcopy(ex_priv->xdr_ctx.xs_sha, trans->tr_csha,
sizeof(trans->tr_csha));
bcopy(ex_priv->xdr_ctx.xs_csha, trans->tr_sha,
sizeof(trans->tr_sha));
bcopy(ex_priv->xdr_ctx.xs_iv, trans->tr_iv,
sizeof(trans->tr_iv));
} else {
bcopy(ex_priv->xdr_ctx.xs_sha, trans->tr_sha,
sizeof(trans->tr_sha));
}
if (clog_mask_is_set(CT_LOG_SHA)) {
ct_sha1_encode(trans->tr_sha, shat);
CNDBG(CT_LOG_SHA, "extracting sha %s", shat);
}
trans->tr_state = TR_S_EX_SHA;
trans->tr_complete = ct_extract_complete_file_read;
trans->tr_dataslot = 0;
ct_ref_fnode(trans->tr_fl_node);
trans->tr_cleanup = ct_extract_cleanup_fnode;
ct_queue_first(state, trans);
break;
case XS_RET_FILE_END:
trans = ct_trans_realloc_local(state, trans);
if (ex_priv->doextract == 0 ||
ex_priv->fl_ex_node->fn_skip_file != 0) {
/* release our reference done with file */
if (ex_priv->fl_ex_node) {
ct_free_fnode(ex_priv->fl_ex_node);
ex_priv->fl_ex_node = NULL;
}
ct_trans_free(state, trans);
continue;
}
/* use saved fnode from state */
trans->tr_fl_node = ex_priv->fl_ex_node;
bcopy(ex_priv->xdr_ctx.xs_trl.cmt_sha, trans->tr_sha,
sizeof(trans->tr_sha));
trans->tr_state = TR_S_EX_FILE_END;
trans->tr_complete = ct_extract_complete_file_end;
trans->tr_cleanup = ct_extract_cleanup_fnode;
trans->tr_fl_node->fn_size =
ex_priv->xdr_ctx.xs_trl.cmt_orig_size;
/*
* no reference here since we give our reference to the
* last transaction on that file. We are done with it.
*/
ex_priv->fl_ex_node = NULL;
ct_queue_first(state, trans);
break;
case XS_RET_EOF:
CNDBG(CT_LOG_CTFILE, "Hit end of ctfile");
ctfile_parse_close(&ex_priv->xdr_ctx);
/* if rb tree and rb is empty, goto end state */
if ((ex_priv->haverb || ex_priv->fillrb) &&
ct_extract_rb_empty(&ex_priv->pending_tree)) {
/*
* Cleanup extract queue, in case we had files
* left.
*/
ct_extract_cleanup_queue(
&ex_priv->extract_head);
goto we_re_done_here;
}
if (!TAILQ_EMPTY(&ex_priv->extract_head)) {
/*
* if allfiles and this was the first pass.
* free the current match lists
* switch to rb tree mode
*/
if (ex_priv->fillrb) {
ct_match_unwind(ex_priv->inc_match);
if (ex_priv->ex_match)
ct_match_unwind(
ex_priv->ex_match);
ex_priv->ex_match = NULL;
ex_priv->inc_match = NULL;
ex_priv->haverb = 1;
ex_priv->fillrb = 0;
}
ct_trans_free(state, trans);
/* reinits ex_priv->xdr_ctx */
if ((ret =
ct_extract_open_next(&ex_priv->extract_head,
&ex_priv->xdr_ctx)) != 0) {
ct_fatal(state,
"Can't open next ctfile", ret);
goto dying;
}
state->ct_print_ctfile_info(
state->ct_print_state,
ex_priv->xdr_ctx.xs_filename,
&ex_priv->xdr_ctx.xs_gh);
/* poke file into action */
ct_wakeup_file(state->event_state);
} else {
/*
* If rb tree and it is still has entries,
* bitch about it
*/
/* XXX print out missing files */
if ((ex_priv->haverb || ex_priv->fillrb) &&
ct_extract_rb_empty(
&ex_priv->pending_tree)) {
CWARNX("out of ctfiles but some "
"files are not found");
}
we_re_done_here:
if (ex_priv->inc_match)
ct_match_unwind(ex_priv->inc_match);
if (ex_priv->ex_match)
ct_match_unwind(
ex_priv->ex_match);
ct_extract_pending_cleanup(
&ex_priv->pending_tree);
e_free(&ex_priv);
op->op_priv = NULL;
trans->tr_state = TR_S_DONE;
trans->tr_complete = ct_extract_complete_done;
trans->tr_cleanup = ct_extract_cleanup_done;
/*
* Technically this should be a local
* transaction. However, since we are done
* it doesn't really matter either way.
*/
ct_queue_first(state, trans);
CNDBG(CT_LOG_TRANS, "extract finished");
ct_set_file_state(state, CT_S_FINISHED);
}
return;
break;
case XS_RET_FAIL:
ct_fatal(state, "Failed to parse ctfile",
ex_priv->xdr_ctx.xs_errno);
goto dying;
break;
}
}
return;
dying:
/* only if we hadn't sent the final transaction yet */
if (ex_priv != NULL) {
ct_extract_cleanup_queue(&ex_priv->extract_head);
if (ex_priv->inc_match)
ct_match_unwind(ex_priv->inc_match);
if (ex_priv->ex_match)
ct_match_unwind(ex_priv->ex_match);
if (!ct_extract_rb_empty(&ex_priv->pending_tree)) {
ct_extract_pending_cleanup(&ex_priv->pending_tree);
}
if (ex_priv->fl_ex_node != NULL) {
ct_free_fnode(ex_priv->fl_ex_node);
}
/* XXX what about ex_priv->xdr_ctx ? */
e_free(&ex_priv);
op->op_priv = NULL;
/* if ex_priv is gone then the trans will clean this up */
if (state->extract_state)
ct_file_extract_cleanup(state->extract_state);
}
return;
}
/*
* Extract an individual file that has been passed into the op by op_priv.
*/
void
ct_extract_file(struct ct_global_state *state, struct ct_op *op)
{
struct ct_extract_file_args *cefa = op->op_args;
struct ct_file_extract_priv *ex_priv = op->op_priv;
const char *localfile = cefa->cefa_filename;
struct ct_trans *trans;
int ret;
char shat[SHA_DIGEST_STRING_LENGTH];
if (state->ct_dying != 0)
goto dying;
CNDBG(CT_LOG_TRANS, "entry");
switch (ct_get_file_state(state)) {
case CT_S_STARTING:
CNDBG(CT_LOG_TRANS, "starting");
ex_priv = e_calloc(1, sizeof(*ex_priv));
/* open file and seek to beginning of file */
if ((ret = ctfile_parse_init_at(&ex_priv->xdr_ctx,
cefa->cefa_ctfile, NULL, cefa->cefa_ctfile_off)) != 0) {
/* XXX add pathname */
ct_fatal(state, "Can't open ctfile", ret);
e_free(&ex_priv);
goto dying;
}
/* XXX we should handle this better */
if (state->ct_max_block_size <
ex_priv->xdr_ctx.xs_gh.cmg_chunk_size)
CABORTX("block size negotiated with server %d is "
"smaller than file max block size %d",
state->ct_max_block_size,
ex_priv->xdr_ctx.xs_gh.cmg_chunk_size);
if ((ret = ct_file_extract_init(&state->extract_state,
NULL, 0, 0, 0, NULL, NULL)) != 0) {
ct_fatal(state, "Can not initialise extract state",
ret);
e_free(&ex_priv);
goto dying;
}
op->op_priv = ex_priv;
break;
case CT_S_FINISHED:
return;
default:
break;
}
ct_set_file_state(state, CT_S_RUNNING);
while (1) {
if ((trans = ct_trans_alloc(state)) == NULL) {
CNDBG(CT_LOG_TRANS, "ran out of transactions, waiting");
ct_set_file_state(state, CT_S_WAITING_TRANS);
return;
}
trans->tr_statemachine = ct_state_extract;
if (ex_priv->done) {
CNDBG(CT_LOG_CTFILE, "Hit end of ctfile");
ctfile_parse_close(&ex_priv->xdr_ctx);
e_free(&ex_priv);
op->op_priv = NULL;
trans->tr_state = TR_S_DONE;
trans->tr_complete = ct_extract_complete_done;
trans->tr_cleanup = ct_extract_cleanup_done;
ct_queue_first(state, trans);
CNDBG(CT_LOG_TRANS, "extract finished");
ct_set_file_state(state, CT_S_FINISHED);
return;
}
/* unless start of file this is right */
trans->tr_fl_node = ex_priv->fl_ex_node;
switch ((ret = ctfile_parse(&ex_priv->xdr_ctx))) {
case XS_RET_FILE:
CNDBG(CT_LOG_CTFILE, "opening file");
if (ex_priv->xdr_ctx.xs_hdr.cmh_nr_shas == -1)
CABORTX("can't extract file with -1 shas");
trans = ct_trans_realloc_local(state, trans);
trans->tr_fl_node = ex_priv->fl_ex_node =
ct_alloc_fnode();
/* Make it local directory, it won't be set up right. */
ex_priv->xdr_ctx.xs_hdr.cmh_parent_dir = -1;
/*
* Allfiles doesn't matter, only processing one file.
* We have a full path to extract to so always strip
* slash.
*/
ct_populate_fnode(state->extract_state,
&ex_priv->xdr_ctx, trans->tr_fl_node,
&trans->tr_state, 0, 1);
if (trans->tr_state == TR_S_EX_SPECIAL) {
trans->tr_complete =
ct_extract_complete_special;
} else {
trans->tr_complete =
ct_extract_complete_file_start;
}
trans->tr_cleanup = ct_extract_cleanup_fnode;
e_free(&trans->tr_fl_node->fn_fullname);
trans->tr_fl_node->fn_fullname = e_strdup(localfile);
e_free(&trans->tr_fl_node->fn_name);
trans->tr_fl_node->fn_name = e_strdup(localfile);
/* Set name pointer to something else passed in */
CNDBG(CT_LOG_CTFILE, "file %s numshas %" PRId64,
trans->tr_fl_node->fn_fullname,
ex_priv->xdr_ctx.xs_hdr.cmh_nr_shas);
/*
* special files we give our refcount up
* regular files we need a new one since we need to
* keep ours.
*/
if (trans->tr_state != TR_S_EX_SPECIAL) {
ct_ref_fnode(trans->tr_fl_node);
} else {
ex_priv->fl_ex_node = NULL;
}
break;
case XS_RET_SHA:
CNDBG(CT_LOG_SHA, "sha!");
if (ex_priv->xdr_ctx.xs_gh.cmg_flags & CT_MD_CRYPTO) {
/*
* yes csha and sha are reversed, we want
* to download csha, but putting it in sha
* simplifies the code
*/
bcopy(ex_priv->xdr_ctx.xs_sha, trans->tr_csha,
sizeof(trans->tr_csha));
bcopy(ex_priv->xdr_ctx.xs_csha, trans->tr_sha,
sizeof(trans->tr_sha));
bcopy(ex_priv->xdr_ctx.xs_iv, trans->tr_iv,
sizeof(trans->tr_iv));
} else {
bcopy(ex_priv->xdr_ctx.xs_sha, trans->tr_sha,
sizeof(trans->tr_sha));
}
if (clog_mask_is_set(CT_LOG_SHA)) {
ct_sha1_encode(trans->tr_sha, shat);
CNDBG(CT_LOG_SHA, "extracting sha %s", shat);
}
trans->tr_state = TR_S_EX_SHA;
trans->tr_complete = ct_extract_complete_file_read;
trans->tr_cleanup = ct_extract_cleanup_fnode;
trans->tr_dataslot = 0;
ct_ref_fnode(trans->tr_fl_node);
break;
case XS_RET_FILE_END:
trans = ct_trans_realloc_local(state, trans);
trans->tr_fl_node = ex_priv->fl_ex_node; /* reload */
CNDBG(CT_LOG_CTFILE, "file end!");
bcopy(ex_priv->xdr_ctx.xs_trl.cmt_sha, trans->tr_sha,
sizeof(trans->tr_sha));
trans->tr_state = TR_S_EX_FILE_END;
trans->tr_complete = ct_extract_complete_file_end;
trans->tr_cleanup = ct_extract_cleanup_fnode;
trans->tr_fl_node->fn_size =
ex_priv->xdr_ctx.xs_trl.cmt_orig_size;
/* Done now, don't parse further. */
ex_priv->done = 1;
/*
* no reference here since we give our reference to the
* last transaction on that file.
*/
ex_priv->fl_ex_node = NULL;
break;
case XS_RET_FAIL:
ct_fatal(state, "Failed to parse ctfile",
ex_priv->xdr_ctx.xs_errno);
goto dying;
break;
default:
CABORTX("%s: invalid state %d", __func__, ret);
}
ct_queue_first(state, trans);
}
return;
dying:
if (ex_priv) {
ctfile_parse_close(&ex_priv->xdr_ctx);
if (ex_priv->fl_ex_node != NULL) {
ct_free_fnode(ex_priv->fl_ex_node);
}
e_free(&ex_priv);
/* will be cleaned up by trans if ex_priv already gone */
if (state->extract_state)
ct_file_extract_cleanup(state->extract_state);
}
return;
}
/*
* So that we can provide correct statistics we have to go through all ctfiles
* being extracted and sum the sizes to be extracted. This is kinda expensive,
* but not really avoidable if we want to provide the statistics.
*
* Failure means we have called ct fatal.
*/
int
ct_extract_calculate_total(struct ct_global_state *state,
struct ct_extract_args *cea, struct ct_match *inc_match,
struct ct_match *ex_match)
{
struct ct_extract_head extract_head;
struct ctfile_parse_state xdr_ctx;
struct ct_match *rb_match = NULL;
struct fnode *fnode;
int allfiles;
int fillrb = 0, haverb = 0;
int doextract = 0;
int tr_state;
int ret;
int retval = 1;
TAILQ_INIT(&extract_head);
if ((ret = ct_extract_setup(&extract_head,
&xdr_ctx, cea->cea_local_ctfile, cea->cea_ctfile_basedir,
&allfiles)) != 0) {
ct_fatal(state, "can't setup extract queue", ret);
goto done;
}
if (allfiles) {
char *nothing = NULL;
if ((ret = ct_match_compile(&rb_match,
CT_MATCH_RB, ¬hing)) != 0) {
ct_fatal(state, "Couldn't create match tree",
ret);
goto done;
}
fillrb = 1;
}
while (1) {
switch ((ret = ctfile_parse(&xdr_ctx))) {
case XS_RET_FILE:
if (fillrb == 0 && xdr_ctx.xs_hdr.cmh_nr_shas == -1) {
continue;
}
fnode = ct_alloc_fnode();
/* XXX need the fnode for the correct paths */
ct_populate_fnode(state->extract_state,
&xdr_ctx, fnode, &tr_state, allfiles,
cea->cea_strip_slash);
/* we don't care about individual shas */
if (C_ISREG(fnode->fn_type)) {
ctfile_parse_seek(&xdr_ctx);
}
doextract = !ct_match(inc_match,
fnode->fn_fullname);
if (doextract && ex_match != NULL &&
!ct_match(ex_match, fnode->fn_fullname))
doextract = 0;
/*
* If we're on the first ctfile in an allfiles backup
* put the matches with -1 on the rb tree so we'll
* remember to extract it from older files.
*/
if (doextract == 1 && fillrb &&
xdr_ctx.xs_hdr.cmh_nr_shas == -1) {
ct_match_insert_rb(rb_match, fnode->fn_fullname);
doextract = 0;
}
ct_free_fnode(fnode);
break;
case XS_RET_FILE_END:
if (doextract == 0)
continue;
/* update statistics */
state->ct_stats->st_bytes_tot +=
xdr_ctx.xs_trl.cmt_orig_size;
break;
case XS_RET_EOF:
ctfile_parse_close(&xdr_ctx);
/* if rb tree and rb is empty, goto end state */
if ((haverb && ct_match_rb_is_empty(inc_match)) ||
(fillrb && ct_match_rb_is_empty(rb_match))) {
retval = 0;
goto done;
}
if (!TAILQ_EMPTY(&extract_head)) {
/*
* if allfiles and this was the first pass.
* free the current match lists
* switch to rb tree mode
*/
if (fillrb) {
ex_match = NULL;
inc_match = rb_match;
rb_match = NULL;
haverb = 1;
fillrb = 0;
}
/* reinits xdr_ctx */
if ((ret = ct_extract_open_next(&extract_head,
&xdr_ctx)) != 0) {
ct_fatal(state,
"Can't open next ctfile", ret);
goto done;
}
continue;
}
retval = 0;
goto done;
break;
case XS_RET_FAIL:
ct_fatal(state, "Failed to parse ctfile",
xdr_ctx.xs_errno);
goto done;
break;
}
}
done:
/* empty unless we quit early */
ct_extract_cleanup_queue(&extract_head);
/* only have control of the rb tree we made */
if (haverb)
ct_match_unwind(inc_match);
if (rb_match != NULL)
ct_match_unwind(rb_match);
return (retval);
}
/*
* Perform EXISTS checking on every sha in a ctfile chain.
*
* We don't do any filtering. It is assumed that the localdb has been
* flushed/made good before this operation starts so that we can trust lookups.
*/
void
ct_exists_file(struct ct_global_state *state, struct ct_op *op)
{
struct ct_exists_args *ce = op->op_args;
struct ct_exists_priv *ex_priv = op->op_priv;
struct ct_trans *trans;
int ret, allfiles;
/* if we were woken up due to fatal, just clean up local state */
if (state->ct_dying != 0)
goto dying;
CNDBG(CT_LOG_TRANS, "entry");
switch (ct_get_file_state(state)) {
case CT_S_STARTING:
if (ex_priv == NULL) {
ex_priv = e_calloc(1, sizeof(*ex_priv));
TAILQ_INIT(&ex_priv->extract_head);
op->op_priv = ex_priv;
}
if ((ret = ct_extract_setup(&ex_priv->extract_head,
&ex_priv->xdr_ctx, ce->ce_ctfile, ce->ce_ctfile_basedir,
&allfiles)) != 0) {
ct_fatal(state, "can't setup extract queue", ret);
goto dying;
}
break;
case CT_S_FINISHED:
return;
default:
break;
}
ct_set_file_state(state, CT_S_RUNNING);
while (1) {
if ((trans = ct_trans_alloc(state)) == NULL) {
CNDBG(CT_LOG_TRANS, "ran out of transactions, waiting");
ct_set_file_state(state, CT_S_WAITING_TRANS);
return;
}
trans->tr_statemachine = ct_state_exists;
switch ((ret = ctfile_parse(&ex_priv->xdr_ctx))) {
case XS_RET_FILE:
case XS_RET_FILE_END:
ct_trans_free(state, trans);
break;
case XS_RET_SHA:
if (memcmp(zerosha, ex_priv->xdr_ctx.xs_sha,
SHA_DIGEST_LENGTH) == 0) {
if (ctfile_parse_seek(&ex_priv->xdr_ctx)) {
ct_fatal(state, "Can't seek past "
"truncation shas",
ex_priv->xdr_ctx.xs_errno);
goto dying;
}
ct_trans_free(state, trans);
continue;
}
if (ex_priv->xdr_ctx.xs_gh.cmg_flags & CT_MD_CRYPTO) {
/*
* yes csha and sha are reversed, we want
* to download csha, but putting it in sha
* simplifies the code
*/
bcopy(ex_priv->xdr_ctx.xs_sha, trans->tr_sha,
sizeof(trans->tr_csha));
bcopy(ex_priv->xdr_ctx.xs_csha, trans->tr_csha,
sizeof(trans->tr_sha));
bcopy(ex_priv->xdr_ctx.xs_iv, trans->tr_iv,
sizeof(trans->tr_iv));
trans->tr_state = TR_S_COMPSHA_ED;
} else {
trans->tr_state = TR_S_UNCOMPSHA_ED;
bcopy(ex_priv->xdr_ctx.xs_sha, trans->tr_sha,
sizeof(trans->tr_sha));
}
if (clog_mask_is_set(CT_LOG_SHA)) {
char shat[SHA_DIGEST_STRING_LENGTH];
ct_sha1_encode(trans->tr_sha, shat);
CNDBG(CT_LOG_SHA, "EXISTSing sha %s", shat);
}
trans->tr_old_genid = -1; /* XXX */
if (ctdb_lookup_sha(state->ct_db_state, trans->tr_sha,
trans->tr_csha, trans->tr_iv,
&trans->tr_old_genid)) {
CNDBG(CT_LOG_SHA, "sha already in localdb");
state->ct_stats->st_bytes_exists +=
trans->tr_chsize;
ct_trans_free(state, trans);
continue;
}
trans->tr_complete = ct_exists_complete;
trans->tr_cleanup = NULL;
trans->tr_dataslot = 0;
ct_queue_first(state, trans);
break;
case XS_RET_EOF:
CNDBG(CT_LOG_CTFILE, "Hit end of ctfile");
ctfile_parse_close(&ex_priv->xdr_ctx);
if (!TAILQ_EMPTY(&ex_priv->extract_head)) {
/*
* if allfiles and this was the first pass.
* free the current match lists
* switch to rb tree mode
*/
ct_trans_free(state, trans);
/* reinits ex_priv->xdr_ctx */
if ((ret =
ct_extract_open_next(&ex_priv->extract_head,
&ex_priv->xdr_ctx)) != 0) {
ct_fatal(state,
"Can't open next ctfile", ret);
goto dying;
}
} else {
e_free(&ex_priv);
op->op_priv = NULL;
trans->tr_state = TR_S_DONE;
trans->tr_complete = ct_exists_complete_done;
trans->tr_cleanup = NULL;
/*
* Technically this should be a local
* transaction. However, since we are done
* it doesn't really matter either way.
*/
ct_queue_first(state, trans);
CNDBG(CT_LOG_TRANS, "extract finished");
ct_set_file_state(state, CT_S_FINISHED);
}
return;
break;
case XS_RET_FAIL:
ct_fatal(state, "Failed to parse ctfile",
ex_priv->xdr_ctx.xs_errno);
goto dying;
break;
}
}
return;
dying:
/* only if we hadn't sent the final transaction yet */
if (ex_priv != NULL) {
ct_extract_cleanup_queue(&ex_priv->extract_head);
/* XXX what about ex_priv->xdr_ctx ? */
e_free(&ex_priv);
op->op_priv = NULL;
}
return;
}
/*
* Main guts of ctd_build_version_tree. Factored out to avoid deep nesting.
* Insert or update an entry in the tree with the information received from
* the ctfile.
*/
static int
ct_vertree_add(struct ct_vertree_dnode_cache *dnode_cache,
struct ct_vertree_entry *head, struct ctfile_parse_state *parse_state,
struct ct_vertree_ctfile *ctfile, off_t fileoffset, int allfiles)
{
struct ctfile_header *hdr = &parse_state->xs_hdr;
struct ctfile_header *hdrlnk= &parse_state->xs_lnkhdr;
struct dnode *dnode;
struct ct_vertree_dnode *fb_dnode;
struct ct_vertree_entry *parent = NULL, sentry, *entry;
struct ct_vertree_ver *lastver, *ver;
struct ct_vertree_file *file;
struct ct_vertree_spec *spec;
struct ct_vertree_link *linkver;
size_t sz;
bool root_dnode = false;
entry = NULL;
/* First find parent directory if any */
if (hdr->cmh_parent_dir != -1 && hdr->cmh_parent_dir != -2) {
if ((dnode = ctfile_parse_finddir(parse_state,
hdr->cmh_parent_dir)) == NULL) {
CNDBG(CT_LOG_VERTREE, "can't find dir %" PRId64,
hdr->cmh_parent_dir);
return (CTE_CTFILE_CORRUPT);
}
fb_dnode = (struct ct_vertree_dnode *)dnode;
if (fb_dnode == dnode_cache->root_dnode) {
// If we have the root dnode, store in head.
parent = head;
} else {
parent = fb_dnode->cvd_dir;
}
} else {
parent = head;
}
if (parent == head && strcmp(hdr->cmh_filename, CT_PATHSEP_STR) == 0) {
root_dnode = true;
}
/*
* Have parent node, search children to see if we already exist.
* Else make a new one and insert.
*/
sentry.cve_name = hdr->cmh_filename;
if ((entry = RB_FIND(ct_vertree_entries, &parent->cve_children,
&sentry)) == NULL) {
/* new name, insert node */
entry = e_calloc(1, sizeof(*entry));
TAILQ_INIT(&entry->cve_versions);
RB_INIT(&entry->cve_children);
entry->cve_parent = parent;
entry->cve_name = e_strdup(sentry.cve_name);
/* don't insert root dnodes, just do dnode dance */
if (root_dnode) {
goto rootdir;
}
if (RB_INSERT(ct_vertree_entries, &parent->cve_children,
entry) != NULL) {
CNDBG(CT_LOG_VERTREE, "entry %s already exists",
sentry.cve_name);
e_free(&sentry.cve_name);
goto err;
}
}
/*
* then check version tags -> head/tail if mtime and type match, we're
* good else prepare version entry.
*/
if (allfiles) {
lastver = TAILQ_FIRST(&entry->cve_versions);
} else {
lastver = TAILQ_LAST(&entry->cve_versions, ct_vertree_vers);
}
/* Don't check atime, it doesn't matter */
if (lastver != NULL && lastver->cvv_type == hdr->cmh_type &&
lastver->cvv_mtime == hdr->cmh_mtime &&
lastver->cvv_uid == hdr->cmh_uid &&
lastver->cvv_gid == hdr->cmh_gid &&
lastver->cvv_mode == hdr->cmh_mode) {
ver = lastver;
} else { /* something changed. make a new one */
if (C_ISDIR(hdr->cmh_type)) {
sz = sizeof(struct ct_vertree_dir);
} else if (C_ISBLK(hdr->cmh_type) ||
C_ISCHR(hdr->cmh_type)) {
sz = sizeof(struct ct_vertree_spec);
} else if (C_ISLINK(hdr->cmh_type)) {
sz = sizeof(struct ct_vertree_link);
} else if (C_ISREG(hdr->cmh_type)) {
sz = sizeof(struct ct_vertree_file);
} else {
CNDBG(CT_LOG_VERTREE, "invalid type %d", hdr->cmh_type);
goto err;
}
ver = e_calloc(1, sz);
ver->cvv_type = hdr->cmh_type;
ver->cvv_mtime = hdr->cmh_mtime;
ver->cvv_atime = hdr->cmh_atime;
ver->cvv_uid = hdr->cmh_uid;
ver->cvv_gid = hdr->cmh_gid;
ver->cvv_mode = hdr->cmh_mode;
/* dir handled below */
if (C_ISBLK(hdr->cmh_type) || C_ISCHR(hdr->cmh_type)) {
spec = (struct ct_vertree_spec *)ver;
spec->cvs_rdev = hdr->cmh_rdev;
} else if (C_ISLINK(hdr->cmh_type)) {
/* hardlink/symlink */
linkver = (struct ct_vertree_link *)ver;
linkver->cvl_linkname = e_strdup(hdrlnk->cmh_filename);
linkver->cvl_hardlink = !C_ISLINK(hdrlnk->cmh_type);
} else if (C_ISREG(hdr->cmh_type)) {
file = (struct ct_vertree_file *)ver;
file->cvf_nr_shas = -1;
}
if (allfiles) {
TAILQ_INSERT_HEAD(&entry->cve_versions, ver, cvv_link);
} else {
TAILQ_INSERT_TAIL(&entry->cve_versions, ver, cvv_link);
}
}
/*
* Each ctfile only has each directory referenced once, so put it
* in the cache regardless of whether it was known of before, that
* will be a previous run and the cache will have been wiped since
* then.
*/
if (C_ISDIR(hdr->cmh_type)) {
rootdir:
fb_dnode = e_calloc(1, sizeof(*fb_dnode));
fb_dnode->cvd_dnode.d_name = e_strdup(entry->cve_name);
/*
* in the root_dnode case this will be a bad pointer but it
* will never be derefed.
*/
fb_dnode->cvd_dir = entry;
if ((dnode = ctfile_parse_insertdir(parse_state,
&fb_dnode->cvd_dnode)) != NULL)
CABORTX("duplicate dentry");
TAILQ_INSERT_TAIL(&dnode_cache->cache, fb_dnode, cvd_link);
if (root_dnode) {
dnode_cache->root_dnode = fb_dnode;
}
} else if (C_ISREG(hdr->cmh_type)) {
/*
* Allfiles ctfiles may have shas == -1, so in some cases we
* may wish to update an existing file when we find the actual
* shas. It is an error to have a file node with -1 for shas
* after all metadata have been parsed. it means one was
* missing.
*/
file = (struct ct_vertree_file *)ver;
/*
* bugs in previous editions with incremental selection and
* off_t on linux mean that there are ctfiles in the wild which
* provide a list of shas in a later level when the file is
* defined in an earlier level file, also. For example for the
* same filename and date we have level 0: 3 shas, level 1: -1
* shas (i.e. in a previous level), level 2: 3 shas (same as
* level * 0). In that case we just assume that if we already
* have sha data for a file * then it is correct and we skip
* previous versions.
*/
if (file->cvf_nr_shas != -1) {
goto out;
}
/*
* previous linux off_t bugs with files over 2gb mean that there
* are sign extended ctfiles in the wild, so we count those as
* zero length for purposes of the version tree.
*/
if (hdr->cmh_nr_shas < -1) {
hdr->cmh_nr_shas = 0;
}
if (hdr->cmh_nr_shas != -1) {
file->cvf_nr_shas = hdr->cmh_nr_shas;
file->cvf_sha_offs = fileoffset;
file->cvf_file = ctfile;
if (ctfile_parse_seek(parse_state)) {
CNDBG(CT_LOG_VERTREE,
"failed to skip shas in %s",
ctfile->cvc_path);
goto err;
}
}
if (ctfile_parse(parse_state) != XS_RET_FILE_END) {
CNDBG(CT_LOG_VERTREE, "no file trailer found");
goto err;
}
file->cvf_file_size = parse_state->xs_trl.cmt_orig_size;
}
out:
/*
* If we're an explicit "/" entry then we don't want to be added to
* the tree. all our children will be added to the root entry.
*/
if (root_dnode) {
e_free(&entry);
}
return (0);
err:
if (entry != NULL)
e_free(&entry);
return (CTE_CTFILE_CORRUPT);
}
int
ct_version_tree_build(const char *filename, const char *ctfile_basedir,
struct ct_version_tree **version_tree)
{
struct ct_version_tree *tree = NULL;
struct ct_extract_head extract_head;
struct ctfile_parse_state parse_state;
struct ct_vertree_dnode_cache dnode_cache;
struct ct_vertree_dnode *dnode_entry;
struct ct_vertree_ctfile *ctfile = NULL;
struct ct_vertree_dir *root_dir;
struct ct_vertree_ver *root_version;
off_t offset;
int allfiles;
int rv = 0;
TAILQ_INIT(&extract_head);
TAILQ_INIT(&dnode_cache.cache);
dnode_cache.root_dnode = NULL;
if ((rv = ct_extract_setup(&extract_head, &parse_state, filename,
ctfile_basedir, &allfiles))) {
CNDBG(CT_LOG_VERTREE,
"failed to setup extract for filename %s: %s",
filename, ct_strerror(rv));
goto out;
}
/* Create and init ctfile cache */
tree = e_calloc(1, sizeof(*tree));
TAILQ_INIT(&tree->cvt_ctfiles);
TAILQ_INIT(&tree->cvt_head.cve_versions);
RB_INIT(&tree->cvt_head.cve_children);
tree->cvt_head.cve_name = e_strdup("/");
nextfile:
root_dir = e_calloc(1, sizeof(*root_dir));
root_version = &root_dir->cvd_base;
root_version->cvv_type = C_TY_DIR;
root_version->cvv_uid = 0;
root_version->cvv_gid = 0;
root_version->cvv_mode = 0777;
root_version->cvv_atime = parse_state.xs_gh.cmg_created;
root_version->cvv_mtime = parse_state.xs_gh.cmg_created;
TAILQ_INSERT_HEAD(&tree->cvt_head.cve_versions, root_version, cvv_link);
/*
* Create only one struct for each ctfile. Each entry in the version
* tree references the appropriate one. These are added to a cache list
* so they can be freed during tree cleanup.
*/
ctfile = e_calloc(1, sizeof(*ctfile));
strlcpy(ctfile->cvc_path, parse_state.xs_filename,
sizeof(ctfile->cvc_path));
offset = ctfile_parse_tell(&parse_state);
TAILQ_INSERT_TAIL(&tree->cvt_ctfiles, ctfile, cvc_link);
while (((rv = ctfile_parse(&parse_state)) != XS_RET_EOF) &&
(rv != XS_RET_FAIL)) {
switch(rv) {
case XS_RET_FILE:
if ((rv = ct_vertree_add(&dnode_cache, &tree->cvt_head,
&parse_state, ctfile, offset, allfiles)) != 0) {
goto out;
}
break;
case XS_RET_FILE_END:
break;
case XS_RET_SHA:
if ((rv = ctfile_parse_seek(&parse_state))) {
goto out;
}
break;
default:
rv = CTE_CTFILE_CORRUPT;
goto out;
}
offset = ctfile_parse_tell(&parse_state);
}
if (rv == XS_RET_EOF) {
ctfile_parse_close(&parse_state);
if (!TAILQ_EMPTY(&extract_head)) {
/* XXX do we need to zero root dnode? */
ct_extract_open_next(&extract_head, &parse_state);
goto nextfile;
}
rv = 0;
/* free state */
} else {
rv = CTE_CTFILE_CORRUPT;
goto out;
}
*version_tree = tree;
out:
/* Free dnode_cache entries. */
while ((dnode_entry = TAILQ_FIRST(&dnode_cache.cache)) != NULL) {
TAILQ_REMOVE(&dnode_cache.cache, dnode_entry, cvd_link);
if (dnode_entry->cvd_dnode.d_name != NULL)
e_free(&dnode_entry->cvd_dnode.d_name);
e_free(&dnode_entry);
}
return rv;
}
int
ct_list(const char *file, char **flist, char **excludelist, int match_mode,
const char *ctfile_basedir, int strip_slash, int verbose)
{
struct ct_extract_state *ces;
struct ctfile_parse_state xs_ctx;
struct fnode fnodestore;
uint64_t reduction;
struct fnode *fnode = &fnodestore;
struct ct_match *match, *ex_match = NULL;
char *ct_next_filename;
char *sign;
int state;
int doprint = 0;
int ret;
int s_errno = 0, ct_errno = 0;
char shat[SHA_DIGEST_STRING_LENGTH];
char cshat[SHA_DIGEST_STRING_LENGTH];
char iv[CT_IV_LEN*2+1];
if ((ret = ct_file_extract_init(&ces, NULL, 1, 1, 0, NULL, NULL)) != 0)
CFATALX("failed to initialise extract state: %s",
ct_strerror(ret));
if ((ret = ct_match_compile(&match, match_mode, flist)) != 0)
CFATALX("failed to compile match pattern: %s",
ct_strerror(ret));
if (excludelist != NULL && (ret = ct_match_compile(&ex_match,
match_mode, excludelist)) != 0)
CFATALX("failed to compile exclude pattern: %s",
ct_strerror(ret));
verbose++; /* by default print something. */
ct_next_filename = NULL;
next_file:
ret = ctfile_parse_init(&xs_ctx, file, ctfile_basedir);
if (ret)
CFATALX("failed to open %s: %s", file, ct_strerror(ret));
ct_print_ctfile_info(&verbose, file, &xs_ctx.xs_gh);
if (ct_next_filename)
e_free(&ct_next_filename);
if (xs_ctx.xs_gh.cmg_prevlvl_filename) {
CNDBG(CT_LOG_CTFILE, "previous backup file %s\n",
xs_ctx.xs_gh.cmg_prevlvl_filename);
ct_next_filename = e_strdup(xs_ctx.xs_gh.cmg_prevlvl_filename);
}
bzero(&fnodestore, sizeof(fnodestore));
do {
ret = ctfile_parse(&xs_ctx);
switch (ret) {
case XS_RET_FILE:
ct_populate_fnode(ces, &xs_ctx, fnode, &state,
xs_ctx.xs_gh.cmg_flags & CT_MD_MLB_ALLFILES,
strip_slash);
doprint = !ct_match(match, fnode->fn_fullname);
if (doprint && ex_match != NULL &&
!ct_match(ex_match, fnode->fn_fullname))
doprint = 0;
if (doprint) {
ct_pr_fmt_file(&verbose, fnode);
if (!C_ISREG(xs_ctx.xs_hdr.cmh_type) ||
verbose > 2)
printf("\n");
}
if (fnode->fn_hlname)
e_free(&fnode->fn_hlname);
if (fnode->fn_fullname)
e_free(&fnode->fn_fullname);
break;
case XS_RET_FILE_END:
sign = " ";
if (xs_ctx.xs_trl.cmt_comp_size == 0)
reduction = 100;
else {
uint64_t orig, comp;
orig = xs_ctx.xs_trl.cmt_orig_size;
comp = xs_ctx.xs_trl.cmt_comp_size;
if (comp <= orig) {
reduction = 100 * (orig - comp) / orig;
} else {
reduction = 100 * (comp - orig) / orig;
if (reduction != 0)
sign = "-";
}
}
if (doprint && verbose > 1)
printf(" sz: %" PRIu64 " shas: %" PRIu64
" reduction: %s%" PRIu64 "%%\n",
xs_ctx.xs_trl.cmt_orig_size,
xs_ctx.xs_hdr.cmh_nr_shas,
sign, reduction);
else if (doprint)
printf("\n");
break;
case XS_RET_SHA:
if (!(doprint && verbose > 2)) {
if (ctfile_parse_seek(&xs_ctx)) {
CFATALX("seek failed");
}
} else {
int i;
ct_sha1_encode(xs_ctx.xs_sha, shat);
switch (xs_ctx.xs_gh.cmg_flags & CT_MD_CRYPTO) {
case 0:
printf(" sha %s\n", shat);
break;
case CT_MD_CRYPTO:
ct_sha1_encode(xs_ctx.xs_csha, cshat);
for (i = 0; i < CT_IV_LEN; i++)
snprintf(&iv[i * 2], 3, "%02x",
xs_ctx.xs_iv[i]);
printf(" sha %s csha %s iv %s\n",
shat, cshat, iv);
}
}
break;
case XS_RET_EOF:
break;
case XS_RET_FAIL:
s_errno = errno;
ct_errno = xs_ctx.xs_errno;
;
}
} while (ret != XS_RET_EOF && ret != XS_RET_FAIL);
ctfile_parse_close(&xs_ctx);
if (ret != XS_RET_EOF) {
errno = s_errno;
CWARNX("corrupt ctfile: %s", ct_strerror(ct_errno));
} else {
if (ct_next_filename) {
file = ct_next_filename;
goto next_file;
}
}
ct_match_unwind(match);
ct_file_extract_cleanup(ces);
return (0);
}