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tarfs: Correctly track link count.

Browse Source 
Sponsored by:	Juniper Networks, Inc.
Sponsored by:	Klara, Inc.
Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D39019
This commit is contained in:
Dag-Erling Smørgrav 2023-03-16 11:31:06 +00:00
parent 6cb78fa479
commit fd8c98a52f
3 changed files with 18 additions and 4 deletions
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13
sys/fs/tarfs/tarfs_subr.c
View File

@ -384,6 +384,18 @@ tarfs_free_node(struct tarfs_node *tnp)
tmp = tnp->tmp;
switch (tnp->type) {
case VREG:
if (tnp->nlink-- > 1)
return;
if (tnp->other != NULL)
tarfs_free_node(tnp->other);
break;
case VDIR:
if (tnp->nlink-- > 2)
return;
if (tnp->parent != NULL && tnp->parent != tnp)
tarfs_free_node(tnp->parent);
break;
case VLNK:
if (tnp->link.name)
free(tnp->link.name, M_TARFSNAME);
@ -397,6 +409,7 @@ tarfs_free_node(struct tarfs_node *tnp)
free(tnp->blk, M_TARFSBLK);
if (tnp->ino >= TARFS_MININO)
free_unr(tmp->ino_unr, tnp->ino);
TAILQ_REMOVE(&tmp->allnodes, tnp, entries);
free(tnp, M_TARFSNODE);
tmp->nfiles--;
}

7
sys/fs/tarfs/tarfs_vfsops.c
View File

@ -406,16 +406,14 @@ static void
tarfs_free_mount(struct tarfs_mount *tmp)
{
struct mount *mp;
struct tarfs_node *tnp;
struct tarfs_node *tnp, *tnp_next;
MPASS(tmp != NULL);
TARFS_DPF(ALLOC, "%s: Freeing mount structure %p\n", __func__, tmp);
TARFS_DPF(ALLOC, "%s: freeing tarfs_node structures\n", __func__);
while (!TAILQ_EMPTY(&tmp->allnodes)) {
tnp = TAILQ_FIRST(&tmp->allnodes);
TAILQ_REMOVE(&tmp->allnodes, tnp, entries);
TAILQ_FOREACH_SAFE(tnp, &tmp->allnodes, entries, tnp_next) {
tarfs_free_node(tnp);
}
@ -744,6 +742,7 @@ tarfs_alloc_one(struct tarfs_mount *tmp, off_t *blknump)
error = EINVAL;
goto bad;
}
tnp->other->nlink++;
break;
case TAR_TYPE_SYMLINK:
if (link == NULL) {

2
tests/sys/fs/tarfs/tarfs_test.sh
View File

@ -59,6 +59,8 @@ tarfs_basic_body() {
atf_check_equal "$(stat -f%d,%i "${mnt}"/sparse_file)" "$(stat -L -f%d,%i "${mnt}"/short_link)"
atf_check_equal "$(stat -f%d,%i "${mnt}"/sparse_file)" "$(stat -L -f%d,%i "${mnt}"/long_link)"
atf_check_equal "$(sha256 -q "${mnt}"/sparse_file)" ${sum}
atf_check_equal "$(stat -f%l "${mnt}"/sparse_file)" 2
atf_check_equal "$(stat -f%l "${mnt}"/hard_link)" 2
}
tarfs_basic_cleanup() {
umount "${mnt}" || true