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OpenZFS 8984 - fix for 6764 breaks ACL inheritance 

Authored by: Dominik Hassler <hadfl@omniosce.org>
Reviewed by: Sam Zaydel <szaydel@racktopsystems.com>
Reviewed by: Paul B. Henson <henson@acm.org>
Reviewed by: Prakash Surya <prakash.surya@delphix.com>
Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov>
Approved by: Matthew Ahrens <mahrens@delphix.com>
Ported-by: Paul B. Henson <henson@acm.org>

OpenZFS-issue: https://www.illumos.org/issues/8984
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/e9bacc6d1a
Closes #10266
This commit is contained in:
Paul B. Henson 2019-12-05 05:58:12 +00:00 committed by Brian Behlendorf
parent 5a2f527d4b
commit 99495ba6ab
1 changed files with 28 additions and 10 deletions
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26
module/os/linux/zfs/zfs_acl.c
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@ -1646,7 +1646,7 @@ zfs_ace_can_use(umode_t obj_mode, uint16_t acep_flags)
*/
static zfs_acl_t *
zfs_acl_inherit(zfsvfs_t *zfsvfs, umode_t va_mode, zfs_acl_t *paclp,
uint64_t mode)
uint64_t mode, boolean_t *need_chmod)
{
void *pacep = NULL;
void *acep;
@ -1660,6 +1660,9 @@ zfs_acl_inherit(zfsvfs_t *zfsvfs, umode_t va_mode, zfs_acl_t *paclp,
size_t data1sz, data2sz;
uint_t aclinherit;
boolean_t isdir = S_ISDIR(va_mode);
boolean_t isreg = S_ISREG(va_mode);
*need_chmod = B_TRUE;
aclp = zfs_acl_alloc(paclp->z_version);
aclinherit = zfsvfs->z_acl_inherit;
@ -1682,6 +1685,17 @@ zfs_acl_inherit(zfsvfs_t *zfsvfs, umode_t va_mode, zfs_acl_t *paclp,
!zfs_ace_can_use(va_mode, iflags))
continue;
/*
* If owner@, group@, or everyone@ inheritable
* then zfs_acl_chmod() isn't needed.
*/
if ((aclinherit == ZFS_ACL_PASSTHROUGH ||
aclinherit == ZFS_ACL_PASSTHROUGH_X) &&
((iflags & (ACE_OWNER|ACE_EVERYONE)) ||
((iflags & OWNING_GROUP) == OWNING_GROUP)) &&
(isreg || (isdir && (iflags & ACE_DIRECTORY_INHERIT_ACE))))
*need_chmod = B_FALSE;
/*
* Strip inherited execute permission from file if
* not in mode
@ -1769,6 +1783,7 @@ zfs_acl_ids_create(znode_t *dzp, int flag, vattr_t *vap, cred_t *cr,
zfsvfs_t *zfsvfs = ZTOZSB(dzp);
zfs_acl_t *paclp;
gid_t gid = vap->va_gid;
boolean_t need_chmod = B_TRUE;
boolean_t trim = B_FALSE;
boolean_t inherited = B_FALSE;
@ -1862,7 +1877,7 @@ zfs_acl_ids_create(znode_t *dzp, int flag, vattr_t *vap, cred_t *cr,
VERIFY(0 == zfs_acl_node_read(dzp, B_TRUE,
&paclp, B_FALSE));
acl_ids->z_aclp = zfs_acl_inherit(zfsvfs,
vap->va_mode, paclp, acl_ids->z_mode);
vap->va_mode, paclp, acl_ids->z_mode, &need_chmod);
inherited = B_TRUE;
} else {
acl_ids->z_aclp =
@ -1872,16 +1887,19 @@ zfs_acl_ids_create(znode_t *dzp, int flag, vattr_t *vap, cred_t *cr,
mutex_exit(&dzp->z_lock);
mutex_exit(&dzp->z_acl_lock);
if (need_chmod) {
if (S_ISDIR(vap->va_mode))
acl_ids->z_aclp->z_hints |= ZFS_ACL_AUTO_INHERIT;
acl_ids->z_aclp->z_hints |=
ZFS_ACL_AUTO_INHERIT;
if (zfsvfs->z_acl_mode == ZFS_ACL_GROUPMASK &&
zfsvfs->z_acl_inherit != ZFS_ACL_PASSTHROUGH &&
zfsvfs->z_acl_inherit != ZFS_ACL_PASSTHROUGH_X)
trim = B_TRUE;
zfs_acl_chmod(S_ISDIR(vap->va_mode), acl_ids->z_mode, B_FALSE,
zfs_acl_chmod(vap->va_mode, acl_ids->z_mode, B_FALSE,
trim, acl_ids->z_aclp);
}
}
if (inherited || vsecp) {
acl_ids->z_mode = zfs_mode_compute(acl_ids->z_mode,