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Linux 5.15 compat: get_acl()

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Kernel commits

332f606b32b6 ovl: enable RCU'd ->get_acl()
0cad6246621b vfs: add rcu argument to ->get_acl() callback

Added compatibility code to detect the new ->get_acl() interface
and correctly handle the case where the new rcu argument is set.

Reviewed-by: Coleman Kane <ckane@colemankane.org>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #12548
This commit is contained in:
Brian Behlendorf
2021-09-09 09:38:35 -07:00
committed by Tony Hutter
parent 72d16a9b49
commit 7a41ef240a
3 changed files with 52 additions and 9 deletions
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module/os/linux/zfs/zpl_xattr.c
+26 -8
View File
@@ -1012,13 +1012,12 @@ zpl_set_acl(struct inode *ip, struct posix_acl *acl, int type)
}
#endif /* HAVE_SET_ACL */
struct posix_acl *
zpl_get_acl(struct inode *ip, int type)
static struct posix_acl *
zpl_get_acl_impl(struct inode *ip, int type)
{
struct posix_acl *acl;
void *value = NULL;
char *name;
int size;
/*
* As of Linux 3.14, the kernel get_acl will check this for us.
@@ -1042,7 +1041,7 @@ zpl_get_acl(struct inode *ip, int type)
return (ERR_PTR(-EINVAL));
}
size = zpl_xattr_get(ip, name, NULL, 0);
int size = zpl_xattr_get(ip, name, NULL, 0);
if (size > 0) {
value = kmem_alloc(size, KM_SLEEP);
size = zpl_xattr_get(ip, name, value, size);
@@ -1068,6 +1067,25 @@ zpl_get_acl(struct inode *ip, int type)
return (acl);
}
#if defined(HAVE_GET_ACL_RCU)
struct posix_acl *
zpl_get_acl(struct inode *ip, int type, bool rcu)
{
if (rcu)
return (ERR_PTR(-ECHILD));
return (zpl_get_acl_impl(ip, type));
}
#elif defined(HAVE_GET_ACL)
struct posix_acl *
zpl_get_acl(struct inode *ip, int type)
{
return (zpl_get_acl_impl(ip, type));
}
#else
#error "Unsupported iops->get_acl() implementation"
#endif /* HAVE_GET_ACL_RCU */
int
zpl_init_acl(struct inode *ip, struct inode *dir)
{
@@ -1078,7 +1096,7 @@ zpl_init_acl(struct inode *ip, struct inode *dir)
return (0);
if (!S_ISLNK(ip->i_mode)) {
acl = zpl_get_acl(dir, ACL_TYPE_DEFAULT);
acl = zpl_get_acl_impl(dir, ACL_TYPE_DEFAULT);
if (IS_ERR(acl))
return (PTR_ERR(acl));
if (!acl) {
@@ -1127,7 +1145,7 @@ zpl_chmod_acl(struct inode *ip)
if (S_ISLNK(ip->i_mode))
return (-EOPNOTSUPP);
acl = zpl_get_acl(ip, ACL_TYPE_ACCESS);
acl = zpl_get_acl_impl(ip, ACL_TYPE_ACCESS);
if (IS_ERR(acl) || !acl)
return (PTR_ERR(acl));
@@ -1189,7 +1207,7 @@ __zpl_xattr_acl_get_access(struct inode *ip, const char *name,
if (ITOZSB(ip)->z_acl_type != ZFS_ACLTYPE_POSIX)
return (-EOPNOTSUPP);
acl = zpl_get_acl(ip, type);
acl = zpl_get_acl_impl(ip, type);
if (IS_ERR(acl))
return (PTR_ERR(acl));
if (acl == NULL)
@@ -1217,7 +1235,7 @@ __zpl_xattr_acl_get_default(struct inode *ip, const char *name,
if (ITOZSB(ip)->z_acl_type != ZFS_ACLTYPE_POSIX)
return (-EOPNOTSUPP);
acl = zpl_get_acl(ip, type);
acl = zpl_get_acl_impl(ip, type);
if (IS_ERR(acl))
return (PTR_ERR(acl));
if (acl == NULL)