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Hold thread reference while frobbing cdevsw.

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This commit is contained in:
Poul-Henning Kamp 2004-09-24 06:37:00 +00:00
parent eea4bca56b
commit f69f5fbd42
1 changed files with 22 additions and 16 deletions
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38
sys/compat/linux/linux_stats.c
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@ -84,15 +84,18 @@ newstat_copyout(struct stat *buf, void *ubuf)
*/
if (S_ISCHR(tbuf.st_mode) &&
(dev = findcdev(buf->st_rdev)) != NULL) {
cdevsw = devsw(dev);
if (cdevsw != NULL && (cdevsw->d_flags & D_DISK)) {
tbuf.st_mode &= ~S_IFMT;
tbuf.st_mode |= S_IFBLK;
cdevsw = dev_refthread(dev);
if (cdevsw != NULL) {
if (cdevsw->d_flags & D_DISK) {
tbuf.st_mode &= ~S_IFMT;
tbuf.st_mode |= S_IFBLK;
/* XXX this may not be quite right */
/* Map major number to 0 */
tbuf.st_dev = uminor(buf->st_dev) & 0xf;
tbuf.st_rdev = buf->st_rdev & 0xff;
/* XXX this may not be quite right */
/* Map major number to 0 */
tbuf.st_dev = uminor(buf->st_dev) & 0xf;
tbuf.st_rdev = buf->st_rdev & 0xff;
}
dev_relthread(dev);
}
}
@ -428,15 +431,18 @@ stat64_copyout(struct stat *buf, void *ubuf)
*/
if (S_ISCHR(lbuf.st_mode) &&
(dev = findcdev(buf->st_rdev)) != NULL) {
cdevsw = devsw(dev);
if (cdevsw != NULL && (cdevsw->d_flags & D_DISK)) {
lbuf.st_mode &= ~S_IFMT;
lbuf.st_mode |= S_IFBLK;
cdevsw = dev_refthread(dev);
if (cdevsw != NULL) {
if (cdevsw->d_flags & D_DISK) {
lbuf.st_mode &= ~S_IFMT;
lbuf.st_mode |= S_IFBLK;
/* XXX this may not be quite right */
/* Map major number to 0 */
lbuf.st_dev = uminor(buf->st_dev) & 0xf;
lbuf.st_rdev = buf->st_rdev & 0xff;
/* XXX this may not be quite right */
/* Map major number to 0 */
lbuf.st_dev = uminor(buf->st_dev) & 0xf;
lbuf.st_rdev = buf->st_rdev & 0xff;
}
dev_relthread(dev);
}
}