bool Fat::isFat32(int dosfs) {
struct bootblock boot;
if (!readboot(dosfs, &boot)) {
return boot.flags & FAT32;
}
else {
SLOGI("Not valid BPB. return NOT FAT32.");
return false;
}
}
static int
writelabel(void)
{
int i, fd, serrno;
struct gctl_req *grq;
char const *errstr;
struct disklabel *lp = &lab;
if (disable_write) {
warnx("write to disk label suppressed - label was as follows:");
display(stdout, NULL);
return (0);
}
lp->d_magic = DISKMAGIC;
lp->d_magic2 = DISKMAGIC;
lp->d_checksum = 0;
lp->d_checksum = dkcksum(lp);
if (installboot)
readboot();
for (i = 0; i < lab.d_npartitions; i++)
if (lab.d_partitions[i].p_size)
lab.d_partitions[i].p_offset += lba_offset;
bsd_disklabel_le_enc(bootarea + labeloffset + labelsoffset * lab.d_secsize,
lp);
fd = open(specname, O_RDWR);
if (fd < 0) {
if (is_file) {
warn("cannot open file %s for writing label", specname);
return(1);
} else
serrno = errno;
if (geom_class_available("PART") != 0) {
/*
* Since we weren't able open provider for
* writing, then recommend user to use gpart(8).
*/
warnc(serrno,
"cannot open provider %s for writing label",
specname);
warnx("Try to use gpart(8).");
return (1);
}
/* Give up if GEOM_BSD is not available. */
if (geom_class_available("BSD") == 0) {
warnc(serrno, "%s", specname);
return (1);
}
grq = gctl_get_handle();
gctl_ro_param(grq, "verb", -1, "write label");
gctl_ro_param(grq, "class", -1, "BSD");
gctl_ro_param(grq, "geom", -1, pname);
gctl_ro_param(grq, "label", 148+16*8,
bootarea + labeloffset + labelsoffset * lab.d_secsize);
errstr = gctl_issue(grq);
if (errstr != NULL) {
warnx("%s", errstr);
gctl_free(grq);
return(1);
}
gctl_free(grq);
if (installboot) {
grq = gctl_get_handle();
gctl_ro_param(grq, "verb", -1, "write bootcode");
gctl_ro_param(grq, "class", -1, "BSD");
gctl_ro_param(grq, "geom", -1, pname);
gctl_ro_param(grq, "bootcode", BBSIZE, bootarea);
errstr = gctl_issue(grq);
if (errstr != NULL) {
warnx("%s", errstr);
gctl_free(grq);
return (1);
}
gctl_free(grq);
}
} else {
if (write(fd, bootarea, bbsize) != bbsize) {
warn("write %s", specname);
close (fd);
return (1);
}
close (fd);
}
return (0);
}
int
checkfilesys(const char *fname)
{
int dosfs;
struct bootblock boot;
struct fatEntry *fat = NULL;
int finish_dosdirsection=0;
u_int i;
int mod = 0;
int ret = 8;
rdonly = alwaysno;
if (!preen)
printf("** %s", fname);
dosfs = open(fname, rdonly ? O_RDONLY : O_RDWR, 0);
if (dosfs < 0 && !rdonly) {
dosfs = open(fname, O_RDONLY, 0);
if (dosfs >= 0)
pwarn(" (NO WRITE)\n");
else if (!preen)
printf("\n");
rdonly = 1;
} else if (!preen)
printf("\n");
if (dosfs < 0) {
perror("Can't open");
return 8;
}
if (readboot(dosfs, &boot) != FSOK) {
close(dosfs);
printf("\n");
return 8;
}
if (skipclean && preen && checkdirty(dosfs, &boot)) {
printf("%s: ", fname);
printf("FILESYSTEM CLEAN; SKIPPING CHECKS\n");
ret = 0;
goto out;
}
if (!preen) {
if (boot.ValidFat < 0)
printf("** Phase 1 - Read and Compare FATs\n");
else
printf("** Phase 1 - Read FAT\n");
}
mod |= readfat(dosfs, &boot, boot.ValidFat >= 0 ? boot.ValidFat : 0, &fat);
if (mod & FSFATAL) {
close(dosfs);
return 8;
}
if (boot.ValidFat < 0)
for (i = 1; i < boot.bpbFATs; i++) {
struct fatEntry *currentFat;
mod |= readfat(dosfs, &boot, i, ¤tFat);
if (mod & FSFATAL)
goto out;
mod |= comparefat(&boot, fat, currentFat, i);
free(currentFat);
if (mod & FSFATAL)
goto out;
}
if (!preen)
printf("** Phase 2 - Check Cluster Chains\n");
mod |= checkfat(&boot, fat);
if (mod & FSFATAL)
goto out;
/* delay writing FATs */
if (!preen)
printf("** Phase 3 - Checking Directories\n");
mod |= resetDosDirSection(&boot, fat);
finish_dosdirsection = 1;
if (mod & FSFATAL)
goto out;
/* delay writing FATs */
mod |= handleDirTree(dosfs, &boot, fat);
if (mod & FSFATAL)
goto out;
if (!preen)
printf("** Phase 4 - Checking for Lost Files\n");
mod |= checklost(dosfs, &boot, fat);
if (mod & FSFATAL)
goto out;
/* now write the FATs */
if (mod & FSFATMOD) {
if (ask(1, "Update FATs")) {
mod |= writefat(dosfs, &boot, fat, mod & FSFIXFAT);
if (mod & FSFATAL)
goto out;
} else
mod |= FSERROR;
}
if (boot.NumBad)
pwarn("%d files, %d free (%d clusters), %d bad (%d clusters)\n",
boot.NumFiles,
boot.NumFree * boot.ClusterSize / 1024, boot.NumFree,
boot.NumBad * boot.ClusterSize / 1024, boot.NumBad);
else
pwarn("%d files, %d free (%d clusters)\n",
boot.NumFiles,
boot.NumFree * boot.ClusterSize / 1024, boot.NumFree);
if (mod && (mod & FSERROR) == 0) {
if (mod & FSDIRTY) {
if (ask(1, "MARK FILE SYSTEM CLEAN") == 0)
mod &= ~FSDIRTY;
if (mod & FSDIRTY) {
pwarn("MARKING FILE SYSTEM CLEAN\n");
mod |= writefat(dosfs, &boot, fat, 1);
} else {
pwarn("\n***** FILE SYSTEM IS LEFT MARKED AS DIRTY *****\n");
mod |= FSERROR; /* file system not clean */
}
}
}
if (mod & (FSFATAL | FSERROR))
goto out;
ret = 0;
out:
if (finish_dosdirsection)
finishDosDirSection();
free(fat);
close(dosfs);
if (mod & (FSFATMOD|FSDIRMOD))
pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n");
return ret;
}
int
checkfilesys(const char *fname)
{
int dosfs;
struct bootblock boot;
struct fatEntry *fat = NULL;
int i;
int mod = 0;
int quiet = 0;
int skip_fat_compare = 0;
rdonly = alwaysno;
if (!quiet)
printf("** %s", fname);
dosfs = open(fname, rdonly ? O_RDONLY : O_RDWR, 0);
if (dosfs < 0 && !rdonly) {
xlog_printf(ANDROID_LOG_INFO, FSCK_XLOG_TAG, "dosfs < 0 && !rdonly");
dosfs = open(fname, O_RDONLY, 0);
if (dosfs >= 0)
pwarn(" (NO WRITE)\n");
else if (!quiet)
printf("\n");
rdonly = 1;
} else if (!quiet)
printf("\n");
if (dosfs < 0) {
perror("Can't open");
printf("%s() : Cannot open %s\n", __func__, fname) ;
return 8;
}
if (readboot(dosfs, &boot) == FSFATAL) {
close(dosfs);
printf("\n");
return 8;
}
if (skipclean && preen && checkdirty(dosfs, &boot)) {
printf("%s: ", fname);
printf("FILESYSTEM CLEAN; SKIPPING CHECKS\n");
close(dosfs);
return 0;
}
if (((boot.FATsecs * boot.BytesPerSec) / 1024) > FAT_COMPARE_MAX_KB) {
xlog_printf(ANDROID_LOG_INFO, FSCK_XLOG_TAG, " - ((boot.FATsecs * boot.BytesPerSec) / 1024) = %d > FAT_COMPARE_MAX_KB(%d)",
((boot.FATsecs * boot.BytesPerSec) / 1024),
FAT_COMPARE_MAX_KB
);
xlog_printf(ANDROID_LOG_INFO, FSCK_XLOG_TAG, " - Skip FAT compare!") ;
skip_fat_compare = 1;
}
start_count(&fsck_p1_time) ;
if (!quiet) {
if (skip_fat_compare)
printf("** Phase 1 - Read FAT (compare skipped)\n");
else if (boot.ValidFat < 0)
printf("** Phase 1 - Read and Compare FATs\n");
else
printf("** Phase 1 - Read FAT\n");
}
mod |= readfat(dosfs, &boot, boot.ValidFat >= 0 ? boot.ValidFat : 0, &fat);
if (mod & FSERROR) {
printf("FSERROR after readfat()\n");
}
if (mod & FSFATAL) {
printf("\nFatal error during readfat()\n");
close(dosfs);
return 8;
}
if (!skip_fat_compare && boot.ValidFat < 0)
for (i = 1; i < (int)boot.FATs; i++) {
struct fatEntry *currentFat;
mod |= readfat(dosfs, &boot, i, ¤tFat);
if (mod & FSFATAL) {
printf("Fatal error during readfat() for comparison\n");
free(fat);
(void)close(dosfs);
return 8;
}
mod |= comparefat(&boot, fat, currentFat, i);
free(currentFat);
if (mod & FSFATAL) {
printf("Fatal error during FAT comparison\n");
free(fat);
(void)close(dosfs);
return 8;
}
}
end_count("Phase#1", &fsck_p1_time) ;
start_count(&fsck_p2_time) ;
if (!quiet)
printf("** Phase 2 - Check Cluster Chains\n");
mod |= checkfat(&boot, fat);
if (mod & FSERROR) {
printf("FSERROR after checkfat()\n");
}
if (mod & FSFATAL) {
printf("Fatal error during FAT check\n");
free(fat);
(void)close(dosfs);
return 8;
}
end_count("Phase#2", &fsck_p2_time) ;
/* delay writing FATs */
start_count(&fsck_p3_time) ;
if (!quiet)
printf("** Phase 3 - Checking Directories\n");
mod |= resetDosDirSection(&boot, fat);
if (mod & FSERROR) {
printf("FSERROR after resetDosDirSection()\n");
}
if (mod & FSFATAL) {
printf("Fatal error during resetDosDirSection()\n");
free(fat);
close(dosfs);
return 8;
}
/* delay writing FATs */
mod |= handleDirTree(dosfs, &boot, fat);
if (mod & FSERROR) {
printf("FSERROR after handleDirTree()\n");
/* try to recovery again */
mod &= ~FSERROR;
mod |= handleDirTree(dosfs, &boot, fat);
}
if (mod & FSFATAL) {
printf("Fatal error during handleDirTree()\n");
finishDosDirSection();
free(fat);
close(dosfs);
return 8;
}
end_count("Phase#3", &fsck_p3_time) ;
start_count(&fsck_p4_time) ;
if (!quiet)
printf("** Phase 4 - Checking for Lost Files\n");
mod |= checklost(dosfs, &boot, fat);
if (mod & FSERROR) {
printf("FSERROR after checklost()\n");
}
if (mod & FSFATAL) {
printf("Fatal error during checklost()\n");
finishDosDirSection();
free(fat);
(void)close(dosfs);
return 8;
}
end_count("Phase#4", &fsck_p4_time) ;
/* now write the FATs */
if (mod & FSFATMOD) {
if (ask(1, "Update FATs")) {
mod |= writefat(dosfs, &boot, fat, mod & FSFIXFAT);
if (mod & FSFATAL) {
printf("Fatal error during writefat()\n");
finishDosDirSection();
free(fat);
(void)close(dosfs);
return 8;
}
} else
mod |= FSERROR;
}
if (boot.NumBad)
pwarn("%d files, %d free (%d clusters), %d bad (%d clusters)\n",
boot.NumFiles,
boot.NumFree * boot.ClusterSize / 1024, boot.NumFree,
boot.NumBad * boot.ClusterSize / 1024, boot.NumBad);
else
pwarn("%d files, %d free (%d clusters)\n",
boot.NumFiles,
boot.NumFree * boot.ClusterSize / 1024, boot.NumFree);
if (mod && (mod & FSERROR) == 0) {
if (mod & FSDIRTY) {
if (ask(1, "MARK FILE SYSTEM CLEAN") == 0)
mod &= ~FSDIRTY;
if (mod & FSDIRTY) {
pwarn("MARKING FILE SYSTEM CLEAN\n");
mod |= writefat(dosfs, &boot, fat, 1);
} else {
pwarn("\n***** FILE SYSTEM IS LEFT MARKED AS DIRTY *****\n");
mod |= FSERROR; /* file system not clean */
}
}
}
finishDosDirSection();
free(fat);
(void)close(dosfs);
if (mod & FSFATAL) {
pwarn("\n***** FSFATAL *****\n");
return 8;
}
if (mod & FSERROR) {
pwarn("\n***** FSERROR *****\n");
return 8;
}
if (mod) {
pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n");
return 4;
}
return 0;
}
int Fat::check(const char *fsPath) {
bool rw = true;
if (access(FSCK_MSDOS_PATH, X_OK)) {
SLOGW("Skipping fs checks\n");
return 0;
}
#ifdef FSCK_MSDOS_MTK
SLOGI("-- MTK_FSCK_MSDOS_MTK enabled--");
int fsck_enhanced = 0 ; // 0 : original ver(fsck_msdos), 1 : enhanced ver(fsck_msdos_mtk)
if (access(FSCK_MSDOS_MTK_PATH, X_OK)) {
SLOGW("Because %s does not exist, we just use fsck_msdos (original ver.)", FSCK_MSDOS_MTK_PATH) ;
fsck_enhanced = 0 ;
}
else {
SLOGI("vold:fat:check fs = %s\n", fsPath) ;
int fd = open(fsPath, O_RDONLY);
if(fd < 0) {
SLOGW("Because cannot read dev, we just use fsck_msdos (original ver.)") ;
fsck_enhanced = 0 ;
}
else {
struct bootblock boot ;
if(readboot(fd, &boot) == 0) {
if(boot.ClustMask == 0xfff) {
SLOGW("Because fsck_msdos_mtk only supports FAT32, but this is FAT12!") ;
SLOGW("We still use fsck_msdos for FAT12!") ;
fsck_enhanced = 0 ;
}
else if(boot.ClustMask == 0xffff) {
SLOGW("Because fsck_msdos_mtk only supports FAT32, but this is FAT16!") ;
SLOGW("We still use fsck_msdos for FAT16!") ;
fsck_enhanced = 0 ;
}
else {
SLOGW("We always use fsck_msdos_mtk for FAT32 now!") ;
fsck_enhanced = 1 ;
}
/*if(boot.NumClusters * 16 > 8*1024*1024) {
SLOGI("It may need %d bytes ! It is too much ! Try enhanced fsck -- fsck_msdos_mtk !", boot.NumClusters * 16) ;
fsck_enhanced = 1 ;
}
else
SLOGW("Use fsck_msdos (original ver.)") ;
*/
}
close(fd) ;
}
}
#endif
int pass = 1;
int rc = 0;
do {
const char *args[5];
#ifdef FSCK_MSDOS_MTK
if(fsck_enhanced)
args[0] = FSCK_MSDOS_MTK_PATH;
else
#endif
args[0] = FSCK_MSDOS_PATH;
args[1] = "-p";
args[2] = "-f";
args[3] = fsPath;
args[4] = NULL;
rc = logwrap(4, args, 1);
switch(rc) {
case 0:
SLOGI("Filesystem check completed OK");
return 0;
case 2:
SLOGE("Filesystem check failed (not a FAT filesystem)");
errno = ENODATA;
return -1;
case 4:
if (pass++ <= 3) {
SLOGW("Filesystem modified - rechecking (pass %d)",
pass);
continue;
}
SLOGE("Failing check after too many rechecks");
errno = EIO;
return -1;
default:
SLOGE("Filesystem check failed (unknown exit code %d)", rc);
errno = EIO;
return -1;
}
} while (1);
return 0;
}
bool Fat::checkFatMeta( int dosfs) {
struct bootblock boot;
return (readboot(dosfs, &boot) == 0);
}
int
checkfilesys(const char *fname)
{
int dosfs;
struct bootblock boot;
struct fatEntry *fat = NULL;
int i;
int mod = 0;
rdonly = alwaysno;
if (!preen)
printf("** %s", fname);
dosfs = open(fname, rdonly ? O_RDONLY : O_RDWR, 0);
if (dosfs < 0 && !rdonly) {
dosfs = open(fname, O_RDONLY, 0);
if (dosfs >= 0)
pwarn(" (NO WRITE)\n");
else if (!preen)
printf("\n");
rdonly = 1;
} else if (!preen)
printf("\n");
if (dosfs < 0) {
xperror("Can't open");
return (8);
}
if (readboot(dosfs, &boot) != FSOK) {
(void)close(dosfs);
return (8);
}
if (!preen) {
if (boot.ValidFat < 0)
printf("** Phase 1 - Read and Compare FATs\n");
else
printf("** Phase 1 - Read FAT\n");
}
mod |= readfat(dosfs, &boot, boot.ValidFat >= 0 ? boot.ValidFat : 0, &fat);
if (mod & FSFATAL) {
(void)close(dosfs);
return 8;
}
if (boot.ValidFat < 0)
for (i = 1; i < boot.FATs; i++) {
struct fatEntry *currentFat;
mod |= readfat(dosfs, &boot, i, ¤tFat);
if (mod & FSFATAL) {
free(fat);
(void)close(dosfs);
return 8;
}
mod |= comparefat(&boot, fat, currentFat, i);
free(currentFat);
if (mod & FSFATAL) {
free(fat);
(void)close(dosfs);
return (8);
}
}
if (!preen)
printf("** Phase 2 - Check Cluster Chains\n");
mod |= checkfat(&boot, fat);
if (mod & FSFATAL) {
free(fat);
(void)close(dosfs);
return (8);
}
if (mod & FSFATMOD)
mod |= writefat(dosfs, &boot, fat); /* delay writing fats? XXX */
if (mod & FSFATAL) {
free(fat);
(void)close(dosfs);
return (8);
}
if (!preen)
printf("** Phase 3 - Check Directories\n");
mod |= resetDosDirSection(&boot, fat);
if (mod & FSFATAL) {
free(fat);
close(dosfs);
return 8;
}
if (mod & FSFATMOD)
mod |= writefat(dosfs, &boot, fat); /* delay writing fats? XXX */
if (mod & FSFATAL) {
finishDosDirSection();
free(fat);
(void)close(dosfs);
return (8);
}
mod |= handleDirTree(dosfs, &boot, fat);
if (mod & FSFATAL) {
finishDosDirSection();
free(fat);
(void)close(dosfs);
return (8);
}
if (!preen)
printf("** Phase 4 - Check for Lost Files\n");
mod |= checklost(dosfs, &boot, fat);
if (mod & FSFATAL) {
finishDosDirSection();
free(fat);
(void)close(dosfs);
return 8;
}
if (mod & FSFATMOD)
mod |= writefat(dosfs, &boot, fat); /* delay writing fats? XXX */
finishDosDirSection();
free(fat);
(void)close(dosfs);
if (mod & FSFATAL)
return 8;
if (boot.NumBad)
pwarn("%d files, %d free (%d clusters), %d bad (%d clusters)\n",
boot.NumFiles,
boot.NumFree * boot.ClusterSize / 1024, boot.NumFree,
boot.NumBad * boot.ClusterSize / 1024, boot.NumBad);
else
pwarn("%d files, %d free (%d clusters)\n",
boot.NumFiles,
boot.NumFree * boot.ClusterSize / 1024, boot.NumFree);
if (mod & (FSFATAL | FSERROR))
return (8);
if (mod) {
pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n");
return (4);
}
return (0);
}
