From a300692789615ba43d6ee58cdb0986c5ac4e020f Mon Sep 17 00:00:00 2001 From: Kern Sibbald Date: Sat, 5 Mar 2005 07:41:50 +0000 Subject: [PATCH] Add match_bsr.c git-svn-id: https://bacula.svn.sourceforge.net/svnroot/bacula/trunk@1865 91ce42f0-d328-0410-95d8-f526ca767f89 --- bacula/src/stored/match_bsr.c | 550 ++++++++++++++++++++++++++++++++++ 1 file changed, 550 insertions(+) create mode 100755 bacula/src/stored/match_bsr.c diff --git a/bacula/src/stored/match_bsr.c b/bacula/src/stored/match_bsr.c new file mode 100755 index 0000000000..df6087601f --- /dev/null +++ b/bacula/src/stored/match_bsr.c @@ -0,0 +1,550 @@ +/* + * Match Bootstrap Records (used for restores) against + * Volume Records + * + * Kern Sibbald, June MMII + * + * Version $Id$ + */ + +/* + Copyright (C) 2000-2005 Kern Sibbald + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2 of + the License, or (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public + License along with this program; if not, write to the Free + Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, + MA 02111-1307, USA. + + */ + +#include "bacula.h" +#include "stored.h" +#ifdef HAVE_FNMATCH +#include +#else +#include "lib/fnmatch.h" +#endif + +/* Forward references */ +static int match_volume(BSR *bsr, BSR_VOLUME *volume, VOLUME_LABEL *volrec, bool done); +static int match_sesstime(BSR *bsr, BSR_SESSTIME *sesstime, DEV_RECORD *rec, bool done); +static int match_sessid(BSR *bsr, BSR_SESSID *sessid, DEV_RECORD *rec); +static int match_client(BSR *bsr, BSR_CLIENT *client, SESSION_LABEL *sessrec, bool done); +static int match_job(BSR *bsr, BSR_JOB *job, SESSION_LABEL *sessrec, bool done); +static int match_job_type(BSR *bsr, BSR_JOBTYPE *job_type, SESSION_LABEL *sessrec, bool done); +static int match_job_level(BSR *bsr, BSR_JOBLEVEL *job_level, SESSION_LABEL *sessrec, bool done); +static int match_jobid(BSR *bsr, BSR_JOBID *jobid, SESSION_LABEL *sessrec, bool done); +static int match_findex(BSR *bsr, BSR_FINDEX *findex, DEV_RECORD *rec, bool done); +static int match_volfile(BSR *bsr, BSR_VOLFILE *volfile, DEV_RECORD *rec, bool done); +static int match_stream(BSR *bsr, BSR_STREAM *stream, DEV_RECORD *rec, bool done); +static int match_all(BSR *bsr, DEV_RECORD *rec, VOLUME_LABEL *volrec, SESSION_LABEL *sessrec, bool done); +static int match_block_sesstime(BSR *bsr, BSR_SESSTIME *sesstime, DEV_BLOCK *block); +static int match_block_sessid(BSR *bsr, BSR_SESSID *sessid, DEV_BLOCK *block); +static BSR *find_smallest_volfile(BSR *fbsr, BSR *bsr); + + +/********************************************************************* + * + * If possible, position the archive device (tape) to read the + * next block. + */ +void position_bsr_block(BSR *bsr, DEV_BLOCK *block) +{ + /* To be implemented */ +} + +/********************************************************************* + * + * Do fast block rejection based on bootstrap records. + * use_fast_rejection will be set if we have VolSessionId and VolSessTime + * in each record. When BlockVer is >= 2, we have those in the block header + * so can do fast rejection. + * + * returns: 1 if block may contain valid records + * 0 if block may be skipped (i.e. it contains no records of + * that can match the bsr). + * + */ +int match_bsr_block(BSR *bsr, DEV_BLOCK *block) +{ + if (!bsr || !bsr->use_fast_rejection || (block->BlockVer < 2)) { + return 1; /* cannot fast reject */ + } + + for ( ; bsr; bsr=bsr->next) { + if (!match_block_sesstime(bsr, bsr->sesstime, block)) { + continue; + } + if (!match_block_sessid(bsr, bsr->sessid, block)) { + continue; + } + return 1; + } + return 0; +} + +static int match_block_sesstime(BSR *bsr, BSR_SESSTIME *sesstime, DEV_BLOCK *block) +{ + if (!sesstime) { + return 1; /* no specification matches all */ + } + if (sesstime->sesstime == block->VolSessionTime) { + return 1; + } + if (sesstime->next) { + return match_block_sesstime(bsr, sesstime->next, block); + } + return 0; +} + +static int match_block_sessid(BSR *bsr, BSR_SESSID *sessid, DEV_BLOCK *block) +{ + if (!sessid) { + return 1; /* no specification matches all */ + } + if (sessid->sessid <= block->VolSessionId && sessid->sessid2 >= block->VolSessionId) { + return 1; + } + if (sessid->next) { + return match_block_sessid(bsr, sessid->next, block); + } + return 0; +} + + +/********************************************************************* + * + * Match Bootstrap records + * returns 1 on match + * returns 0 no match and reposition is set if we should + * reposition the tape + * returns -1 no additional matches possible + */ +int match_bsr(BSR *bsr, DEV_RECORD *rec, VOLUME_LABEL *volrec, SESSION_LABEL *sessrec) +{ + int stat; + + /* + * The bsr->reposition flag is set any time a bsr is done. + * In this case, we can probably reposition the + * tape to the next available bsr position. + */ + if (bsr) { + bsr->reposition = false; + stat = match_all(bsr, rec, volrec, sessrec, true); + /* + * Note, bsr->reposition is set by match_all when + * a bsr is done. We turn it off if a match was + * found or if we cannot use positioning + */ + if (stat != 0 || !bsr->use_positioning) { + bsr->reposition = false; + } + } else { + stat = 1; /* no bsr => match all */ + } + return stat; +} + +/* + * Find the next bsr that applies to the current tape. + * It is the one with the smallest VolFile position. + */ +BSR *find_next_bsr(BSR *root_bsr, DEVICE *dev) +{ + BSR *bsr; + BSR *found_bsr = NULL; + + if (!root_bsr || !root_bsr->use_positioning || + !root_bsr->reposition || !dev_is_tape(dev)) { + Dmsg2(100, "No nxt_bsr use_pos=%d repos=%d\n", root_bsr->use_positioning, root_bsr->reposition); + return NULL; + } + Dmsg2(100, "use_pos=%d repos=%d\n", root_bsr->use_positioning, root_bsr->reposition); + root_bsr->mount_next_volume = false; + for (bsr=root_bsr; bsr; bsr=bsr->next) { + if (bsr->done || !match_volume(bsr, bsr->volume, &dev->VolHdr, 1)) { + continue; + } + if (found_bsr == NULL) { + found_bsr = bsr; + } else { + found_bsr = find_smallest_volfile(found_bsr, bsr); + } + } + /* + * If we get to this point and found no bsr, it means + * that any additional bsr's must apply to the next + * tape, so set a flag. + */ + if (found_bsr == NULL) { + root_bsr->mount_next_volume = true; + } + return found_bsr; +} + +static BSR *find_smallest_volfile(BSR *found_bsr, BSR *bsr) +{ + BSR *return_bsr = found_bsr; + BSR_VOLFILE *vf; + BSR_VOLBLOCK *vb; + uint32_t found_bsr_sfile, bsr_sfile; + uint32_t found_bsr_sblock, bsr_sblock; + + vf = found_bsr->volfile; + found_bsr_sfile = vf->sfile; + while ( (vf=vf->next) ) { + if (vf->sfile < found_bsr_sfile) { + found_bsr_sfile = vf->sfile; + } + } + vf = bsr->volfile; + bsr_sfile = vf->sfile; + while ( (vf=vf->next) ) { + if (vf->sfile < bsr_sfile) { + bsr_sfile = vf->sfile; + } + } + if (found_bsr_sfile > bsr_sfile) { + return_bsr = bsr; + } else if (found_bsr_sfile == bsr_sfile) { + /* Must check block */ + vb = found_bsr->volblock; + found_bsr_sblock = vb->sblock; + while ( (vb=vb->next) ) { + if (vb->sblock < found_bsr_sblock) { + found_bsr_sblock = vb->sblock; + } + } + vb = bsr->volblock; + bsr_sblock = vb->sblock; + while ( (vb=vb->next) ) { + if (vb->sblock < bsr_sblock) { + bsr_sblock = vb->sblock; + } + } + if (found_bsr_sblock > bsr_sblock) { + return_bsr = bsr; + } + } + + return return_bsr; +} + +/* + * Called to tell the matcher that the end of + * the current file has been reached. + * The bsr argument is not used, but is included + * for consistency with the other match calls. + * + * Returns: true if we should reposition + * : false otherwise. + */ +bool match_set_eof(BSR *bsr, DEV_RECORD *rec) +{ + BSR *rbsr = rec->bsr; + Dmsg1(100, "match_set %d\n", rbsr != NULL); + if (!rbsr) { + return false; + } + rec->bsr = NULL; + rbsr->found++; + if (rbsr->count && rbsr->found >= rbsr->count) { + rbsr->done = true; + rbsr->root->reposition = true; + Dmsg2(100, "match_set_eof reposition count=%d found=%d\n", + rbsr->count, rbsr->found); + return true; + } + return false; +} + +/* + * Match all the components of current record + * returns 1 on match + * returns 0 no match + * returns -1 no additional matches possible + */ +static int match_all(BSR *bsr, DEV_RECORD *rec, VOLUME_LABEL *volrec, + SESSION_LABEL *sessrec, bool done) +{ + if (bsr->done) { + goto no_match; + } + if (!match_volume(bsr, bsr->volume, volrec, 1)) { + goto no_match; + } + if (!match_volfile(bsr, bsr->volfile, rec, 1)) { + Dmsg2(100, "Fail on file. bsr=%d rec=%d\n", bsr->volfile->efile, + rec->File); + goto no_match; + } + if (!match_sesstime(bsr, bsr->sesstime, rec, 1)) { + Dmsg2(100, "Fail on sesstime. bsr=%d rec=%d\n", + bsr->sesstime->sesstime, rec->VolSessionTime); + goto no_match; + } + + /* NOTE!! This test MUST come after the sesstime test */ + if (!match_sessid(bsr, bsr->sessid, rec)) { + Dmsg2(100, "Fail on sessid. bsr=%d rec=%d\n", + bsr->sessid->sessid, rec->VolSessionId); + goto no_match; + } + + /* NOTE!! This test MUST come after sesstime and sessid tests */ + if (!match_findex(bsr, bsr->FileIndex, rec, 1)) { + Dmsg2(100, "Fail on findex. bsr=%d rec=%d\n", + bsr->FileIndex->findex2, rec->FileIndex); + goto no_match; + } + /* + * If a count was specified and we have a FileIndex, assume + * it is a Bacula created bsr (or the equivalent). We + * then save the bsr where the match occurred so that + * after processing the record or records, we can update + * the found count. I.e. rec->bsr points to the bsr that + * satisfied the match. + */ + if (bsr->count && bsr->FileIndex) { + rec->bsr = bsr; + return 1; /* this is a complete match */ + } + + /* + * The selections below are not used by Bacula's + * restore command, and don't work because of + * the rec->bsr = bsr optimization above. + */ + if (!match_jobid(bsr, bsr->JobId, sessrec, 1)) { + goto no_match; + + } + if (!match_job(bsr, bsr->job, sessrec, 1)) { + goto no_match; + } + if (!match_client(bsr, bsr->client, sessrec, 1)) { + goto no_match; + } + if (!match_job_type(bsr, bsr->JobType, sessrec, 1)) { + goto no_match; + } + if (!match_job_level(bsr, bsr->JobLevel, sessrec, 1)) { + goto no_match; + } + if (!match_stream(bsr, bsr->stream, rec, 1)) { + goto no_match; + } + return 1; + +no_match: + if (bsr->next) { + return match_all(bsr->next, rec, volrec, sessrec, bsr->done && done); + } + if (bsr->done && done) { + return -1; + } + return 0; +} + +static int match_volume(BSR *bsr, BSR_VOLUME *volume, VOLUME_LABEL *volrec, bool done) +{ + if (!volume) { + return 0; /* Volume must match */ + } + if (strcmp(volume->VolumeName, volrec->VolName) == 0) { + return 1; + } + if (volume->next) { + return match_volume(bsr, volume->next, volrec, 1); + } + return 0; +} + +static int match_client(BSR *bsr, BSR_CLIENT *client, SESSION_LABEL *sessrec, bool done) +{ + if (!client) { + return 1; /* no specification matches all */ + } + if (fnmatch(client->ClientName, sessrec->ClientName, 0) == 0) { + return 1; + } + if (client->next) { + return match_client(bsr, client->next, sessrec, 1); + } + return 0; +} + +static int match_job(BSR *bsr, BSR_JOB *job, SESSION_LABEL *sessrec, bool done) +{ + if (!job) { + return 1; /* no specification matches all */ + } + if (fnmatch(job->Job, sessrec->Job, 0) == 0) { + return 1; + } + if (job->next) { + return match_job(bsr, job->next, sessrec, 1); + } + return 0; +} + +static int match_job_type(BSR *bsr, BSR_JOBTYPE *job_type, SESSION_LABEL *sessrec, bool done) +{ + if (!job_type) { + return 1; /* no specification matches all */ + } + if (job_type->JobType == sessrec->JobType) { + return 1; + } + if (job_type->next) { + return match_job_type(bsr, job_type->next, sessrec, 1); + } + return 0; +} + +static int match_job_level(BSR *bsr, BSR_JOBLEVEL *job_level, SESSION_LABEL *sessrec, bool done) +{ + if (!job_level) { + return 1; /* no specification matches all */ + } + if (job_level->JobLevel == sessrec->JobLevel) { + return 1; + } + if (job_level->next) { + return match_job_level(bsr, job_level->next, sessrec, 1); + } + return 0; +} + +static int match_jobid(BSR *bsr, BSR_JOBID *jobid, SESSION_LABEL *sessrec, bool done) +{ + if (!jobid) { + return 1; /* no specification matches all */ + } + if (jobid->JobId <= sessrec->JobId && jobid->JobId2 >= sessrec->JobId) { + return 1; + } + if (jobid->next) { + return match_jobid(bsr, jobid->next, sessrec, 1); + } + return 0; +} + +static int match_volfile(BSR *bsr, BSR_VOLFILE *volfile, DEV_RECORD *rec, bool done) +{ + if (!volfile) { + return 1; /* no specification matches all */ + } + /* For the moment, these tests work only with tapes. */ + if (!(rec->state & REC_ISTAPE)) { + return 1; /* All File records OK for this match */ + } +// Dmsg3(100, "match_volfile: sfile=%d efile=%d recfile=%d\n", +// volfile->sfile, volfile->efile, rec->File); + if (volfile->sfile <= rec->File && volfile->efile >= rec->File) { + return 1; + } + /* Once we get past last efile, we are done */ + if (rec->File > volfile->efile) { + volfile->done = true; /* set local done */ + } + if (volfile->next) { + return match_volfile(bsr, volfile->next, rec, volfile->done && done); + } + + /* If we are done and all prior matches are done, this bsr is finished */ + if (volfile->done && done) { + bsr->done = true; + bsr->root->reposition = true; + Dmsg2(100, "bsr done from volfile rec=%d volefile=%d\n", + rec->File, volfile->efile); + } + return 0; +} + +static int match_stream(BSR *bsr, BSR_STREAM *stream, DEV_RECORD *rec, bool done) +{ + if (!stream) { + return 1; /* no specification matches all */ + } + if (stream->stream == rec->Stream) { + return 1; + } + if (stream->next) { + return match_stream(bsr, stream->next, rec, 1); + } + return 0; +} + +static int match_sesstime(BSR *bsr, BSR_SESSTIME *sesstime, DEV_RECORD *rec, bool done) +{ + if (!sesstime) { + return 1; /* no specification matches all */ + } + if (sesstime->sesstime == rec->VolSessionTime) { + return 1; + } + if (rec->VolSessionTime > sesstime->sesstime) { + sesstime->done = true; + } + if (sesstime->next) { + return match_sesstime(bsr, sesstime->next, rec, sesstime->done && done); + } + if (sesstime->done && done) { + bsr->done = true; + bsr->root->reposition = true; + Dmsg0(100, "bsr done from sesstime\n"); + } + return 0; +} + +static int match_sessid(BSR *bsr, BSR_SESSID *sessid, DEV_RECORD *rec) +{ + if (!sessid) { + return 1; /* no specification matches all */ + } + if (sessid->sessid <= rec->VolSessionId && sessid->sessid2 >= rec->VolSessionId) { + return 1; + } + if (sessid->next) { + return match_sessid(bsr, sessid->next, rec); + } + return 0; +} + +/* + * When reading the Volume, the Volume Findex (rec->FileIndex) always + * are found in sequential order. Thus we can make optimizations. + */ +static int match_findex(BSR *bsr, BSR_FINDEX *findex, DEV_RECORD *rec, bool done) +{ + if (!findex) { + return 1; /* no specification matches all */ + } + if (findex->findex <= rec->FileIndex && findex->findex2 >= rec->FileIndex) { + return 1; + } + if (rec->FileIndex > findex->findex2) { + findex->done = true; + } + if (findex->next) { + return match_findex(bsr, findex->next, rec, findex->done && done); + } + if (findex->done && done) { + bsr->done = true; + bsr->root->reposition = true; + Dmsg1(100, "bsr done from findex %d\n", rec->FileIndex); + } + return 0; +} -- 2.39.5