/*
* ffsinfo(8) is a tool to dump all metadata of a filesystem. It helps to find
* errors is the filesystem much easier. You can run ffsinfo before and after
* an fsck(8), and compare the two ascii dumps easy with diff, and you see
* directly where the problem is. You can control how much detail you want to
* see with some command line arguments. You can also easy check the status
* of a filesystem, like is there is enough space for growing a filesystem,
* or how many active snapshots do we have. It provides much more detailed
* information then dumpfs. Snapshots, as they are very new, are not really
* supported. They are just mentioned currently, but it is planned to run
* also over active snapshots, to even get that output.
*/
int
main(int argc, char **argv)
{
char *device, *special;
char ch;
size_t len;
struct stat st;
struct partinfo pinfo;
int fsi;
struct csum *dbg_csp;
int dbg_csc;
char dbg_line[80];
int cylno,i;
int cfg_cg, cfg_in, cfg_lv;
int cg_start, cg_stop;
ino_t in;
char *out_file = NULL;
int Lflag=0;
DBG_ENTER;
cfg_lv=0xff;
cfg_in=-2;
cfg_cg=-2;
while ((ch=getopt(argc, argv, "Lg:i:l:o:")) != -1) {
switch(ch) {
case 'L':
Lflag=1;
break;
case 'g':
cfg_cg=atol(optarg);
if(cfg_cg < -1) {
usage();
}
break;
case 'i':
cfg_in=atol(optarg);
if(cfg_in < 0) {
usage();
}
break;
case 'l':
cfg_lv=atol(optarg);
if(cfg_lv < 0x1||cfg_lv > 0x3ff) {
usage();
}
break;
case 'o':
if (out_file)
free(out_file);
out_file = strdup(optarg);
break;
case '?':
/* FALLTHROUGH */
default:
usage();
}
}
argc -= optind;
argv += optind;
if(argc != 1) {
usage();
}
device=*argv;
/*
* Now we try to guess the (raw)device name.
*/
if (0 == strrchr(device, '/') && (stat(device, &st) == -1)) {
/*
* No path prefix was given, so try in that order:
* /dev/r%s
* /dev/%s
* /dev/vinum/r%s
* /dev/vinum/%s.
*
* FreeBSD now doesn't distinguish between raw and block
* devices any longer, but it should still work this way.
*/
len=strlen(device)+strlen(_PATH_DEV)+2+strlen("vinum/");
special=(char *)malloc(len);
if(special == NULL) {
errx(1, "malloc failed");
}
snprintf(special, len, "%sr%s", _PATH_DEV, device);
if (stat(special, &st) == -1) {
snprintf(special, len, "%s%s", _PATH_DEV, device);
if (stat(special, &st) == -1) {
snprintf(special, len, "%svinum/r%s",
_PATH_DEV, device);
if (stat(special, &st) == -1) {
/*
* For now this is the 'last resort'.
*/
snprintf(special, len, "%svinum/%s",
_PATH_DEV, device);
}
}
}
device = special;
}
/*
* Open our device for reading.
*/
fsi = open(device, O_RDONLY);
if (fsi < 0) {
err(1, "%s", device);
}
stat(device, &st);
if(S_ISREG(st.st_mode)) { /* label check not supported for files */
Lflag=1;
}
if(!Lflag) {
/*
* Try to read a label and gess the slice if not specified.
* This code should guess the right thing and avaid to bother
* the user user with the task of specifying the option -v on
* vinum volumes.
*/
if (ioctl(fsi, DIOCGPART, &pinfo) < 0) {
pinfo.media_size = st.st_size;
pinfo.media_blksize = DEV_BSIZE;
pinfo.media_blocks = pinfo.media_size / DEV_BSIZE;
}
/*
* Check if that partition looks suited for dumping.
*/
if (pinfo.media_size == 0) {
errx(1, "partition is unavailable");
}
}
/*
* Read the current superblock.
*/
rdfs((daddr_t)(SBOFF/DEV_BSIZE), (size_t)SBSIZE, &sblock, fsi);
if (sblock.fs_magic != FS_MAGIC) {
errx(1, "superblock not recognized");
}
DBG_OPEN(out_file); /* already here we need a superblock */
if(cfg_lv & 0x001) {
DBG_DUMP_FS(&sblock,
"primary sblock");
}
/*
* Determine here what cylinder groups to dump.
*/
if(cfg_cg==-2) {
cg_start=0;
cg_stop=sblock.fs_ncg;
} else if (cfg_cg==-1) {
cg_start=sblock.fs_ncg-1;
cg_stop=sblock.fs_ncg;
} else if (cfg_cg<sblock.fs_ncg) {
cg_start=cfg_cg;
cg_stop=cfg_cg+1;
} else {
cg_start=sblock.fs_ncg;
cg_stop=sblock.fs_ncg;
}
if (cfg_lv & 0x004) {
fscs = (struct csum *)calloc((size_t)1,
(size_t)sblock.fs_cssize);
if(fscs == NULL) {
errx(1, "calloc failed");
}
/*
* Get the cylinder summary into the memory ...
*/
for (i = 0; i < sblock.fs_cssize; i += sblock.fs_bsize) {
rdfs(fsbtodb(&sblock, sblock.fs_csaddr +
numfrags(&sblock, i)), (size_t)(sblock.fs_cssize-i<
sblock.fs_bsize ? sblock.fs_cssize - i :
sblock.fs_bsize), (void *)(((char *)fscs)+i), fsi);
}
dbg_csp=fscs;
/*
* ... and dump it.
*/
for(dbg_csc=0; dbg_csc<sblock.fs_ncg; dbg_csc++) {
snprintf(dbg_line, sizeof(dbg_line),
"%d. csum in fscs", dbg_csc);
DBG_DUMP_CSUM(&sblock,
dbg_line,
dbg_csp++);
}
}
/*
* For each requested cylinder group ...
*/
for(cylno=cg_start; cylno<cg_stop; cylno++) {
snprintf(dbg_line, sizeof(dbg_line), "cgr %d", cylno);
if(cfg_lv & 0x002) {
/*
* ... dump the superblock copies ...
*/
rdfs(fsbtodb(&sblock, cgsblock(&sblock, cylno)),
(size_t)SBSIZE, &osblock, fsi);
DBG_DUMP_FS(&osblock,
dbg_line);
}
/*
* ... read the cylinder group and dump whatever was requested.
*/
rdfs(fsbtodb(&sblock, cgtod(&sblock, cylno)),
(size_t)sblock.fs_cgsize, &acg, fsi);
if(cfg_lv & 0x008) {
DBG_DUMP_CG(&sblock,
dbg_line,
&acg);
}
if(cfg_lv & 0x010) {
DBG_DUMP_INMAP(&sblock,
dbg_line,
&acg);
}
if(cfg_lv & 0x020) {
DBG_DUMP_FRMAP(&sblock,
dbg_line,
&acg);
}
if(cfg_lv & 0x040) {
DBG_DUMP_CLMAP(&sblock,
dbg_line,
&acg);
DBG_DUMP_CLSUM(&sblock,
dbg_line,
&acg);
}
if(cfg_lv & 0x080) {
DBG_DUMP_SPTBL(&sblock,
dbg_line,
&acg);
}
}
/*
* Dump the requested inode(s).
*/
if(cfg_in != -2) {
dump_whole_inode((ino_t)cfg_in, fsi, cfg_lv);
} else {
for(in=cg_start*sblock.fs_ipg; in<(ino_t)cg_stop*sblock.fs_ipg;
in++) {
dump_whole_inode(in, fsi, cfg_lv);
}
}
DBG_CLOSE;
close(fsi);
DBG_LEAVE;
return 0;
}
/*
* Here we actually start growing the file system. We basically read the
* cylinder summary from the first cylinder group as we want to update
* this on the fly during our various operations. First we handle the
* changes in the former last cylinder group. Afterwards we create all new
* cylinder groups. Now we handle the cylinder group containing the
* cylinder summary which might result in a relocation of the whole
* structure. In the end we write back the updated cylinder summary, the
* new superblock, and slightly patched versions of the super block
* copies.
*/
static void
growfs(int fsi, int fso, unsigned int Nflag)
{
DBG_FUNC("growfs")
time_t modtime;
uint cylno;
int i, j, width;
char tmpbuf[100];
DBG_ENTER;
time(&modtime);
/*
* Get the cylinder summary into the memory.
*/
fscs = (struct csum *)calloc((size_t)1, (size_t)sblock.fs_cssize);
if (fscs == NULL)
errx(1, "calloc failed");
for (i = 0; i < osblock.fs_cssize; i += osblock.fs_bsize) {
rdfs(fsbtodb(&osblock, osblock.fs_csaddr +
numfrags(&osblock, i)), (size_t)MIN(osblock.fs_cssize - i,
osblock.fs_bsize), (void *)(((char *)fscs) + i), fsi);
}
#ifdef FS_DEBUG
{
struct csum *dbg_csp;
u_int32_t dbg_csc;
char dbg_line[80];
dbg_csp = fscs;
for (dbg_csc = 0; dbg_csc < osblock.fs_ncg; dbg_csc++) {
snprintf(dbg_line, sizeof(dbg_line),
"%d. old csum in old location", dbg_csc);
DBG_DUMP_CSUM(&osblock, dbg_line, dbg_csp++);
}
}
#endif /* FS_DEBUG */
DBG_PRINT0("fscs read\n");
/*
* Do all needed changes in the former last cylinder group.
*/
updjcg(osblock.fs_ncg - 1, modtime, fsi, fso, Nflag);
/*
* Dump out summary information about file system.
*/
#ifdef FS_DEBUG
#define B2MBFACTOR (1 / (1024.0 * 1024.0))
printf("growfs: %.1fMB (%jd sectors) block size %d, fragment size %d\n",
(float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR,
(intmax_t)fsbtodb(&sblock, sblock.fs_size), sblock.fs_bsize,
sblock.fs_fsize);
printf("\tusing %d cylinder groups of %.2fMB, %d blks, %d inodes.\n",
sblock.fs_ncg, (float)sblock.fs_fpg * sblock.fs_fsize * B2MBFACTOR,
sblock.fs_fpg / sblock.fs_frag, sblock.fs_ipg);
if (sblock.fs_flags & FS_DOSOFTDEP)
printf("\twith soft updates\n");
#undef B2MBFACTOR
#endif /* FS_DEBUG */
/*
* Now build the cylinders group blocks and
* then print out indices of cylinder groups.
*/
printf("super-block backups (for fsck_ffs -b #) at:\n");
i = 0;
width = charsperline();
/*
* Iterate for only the new cylinder groups.
*/
for (cylno = osblock.fs_ncg; cylno < sblock.fs_ncg; cylno++) {
initcg(cylno, modtime, fso, Nflag);
j = sprintf(tmpbuf, " %jd%s",
(intmax_t)fsbtodb(&sblock, cgsblock(&sblock, cylno)),
cylno < (sblock.fs_ncg - 1) ? "," : "" );
if (i + j >= width) {
printf("\n");
i = 0;
}
i += j;
printf("%s", tmpbuf);
fflush(stdout);
}
printf("\n");
/*
* Do all needed changes in the first cylinder group.
* allocate blocks in new location
*/
updcsloc(modtime, fsi, fso, Nflag);
/*
* Now write the cylinder summary back to disk.
*/
for (i = 0; i < sblock.fs_cssize; i += sblock.fs_bsize) {
wtfs(fsbtodb(&sblock, sblock.fs_csaddr + numfrags(&sblock, i)),
(size_t)MIN(sblock.fs_cssize - i, sblock.fs_bsize),
(void *)(((char *)fscs) + i), fso, Nflag);
}
DBG_PRINT0("fscs written\n");
#ifdef FS_DEBUG
{
struct csum *dbg_csp;
u_int32_t dbg_csc;
char dbg_line[80];
dbg_csp = fscs;
for (dbg_csc = 0; dbg_csc < sblock.fs_ncg; dbg_csc++) {
snprintf(dbg_line, sizeof(dbg_line),
"%d. new csum in new location", dbg_csc);
DBG_DUMP_CSUM(&sblock, dbg_line, dbg_csp++);
}
}
#endif /* FS_DEBUG */
/*
* Now write the new superblock back to disk.
*/
sblock.fs_time = modtime;
wtfs(sblockloc, (size_t)SBLOCKSIZE, (void *)&sblock, fso, Nflag);
DBG_PRINT0("sblock written\n");
DBG_DUMP_FS(&sblock, "new initial sblock");
/*
* Clean up the dynamic fields in our superblock copies.
*/
sblock.fs_fmod = 0;
sblock.fs_clean = 1;
sblock.fs_ronly = 0;
sblock.fs_cgrotor = 0;
sblock.fs_state = 0;
memset((void *)&sblock.fs_fsmnt, 0, sizeof(sblock.fs_fsmnt));
sblock.fs_flags &= FS_DOSOFTDEP;
/*
* XXX
* The following fields are currently distributed from the superblock
* to the copies:
* fs_minfree
* fs_rotdelay
* fs_maxcontig
* fs_maxbpg
* fs_minfree,
* fs_optim
* fs_flags regarding SOFTPDATES
*
* We probably should rather change the summary for the cylinder group
* statistics here to the value of what would be in there, if the file
* system were created initially with the new size. Therefor we still
* need to find an easy way of calculating that.
* Possibly we can try to read the first superblock copy and apply the
* "diffed" stats between the old and new superblock by still copying
* certain parameters onto that.
*/
/*
* Write out the duplicate super blocks.
*/
for (cylno = 0; cylno < sblock.fs_ncg; cylno++) {
wtfs(fsbtodb(&sblock, cgsblock(&sblock, cylno)),
(size_t)SBLOCKSIZE, (void *)&sblock, fso, Nflag);
}
DBG_PRINT0("sblock copies written\n");
DBG_DUMP_FS(&sblock, "new other sblocks");
DBG_LEAVE;
return;
}