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189 lines
5.4 KiB

From f408c6c45013c80d62ed4b793ee79d76e4b582e0 Mon Sep 17 00:00:00 2001
From: Namjae Jeon <namjae.jeon@samsung.com>
Date: Wed, 11 Aug 2021 15:21:04 +0900
Subject: [PATCH] ksmbd: remove select FS_POSIX_ACL in Kconfig
ksmbd is forcing to turn on FS_POSIX_ACL in Kconfig to use vfs acl
functions(posix_acl_alloc, get_acl, set_posix_acl). OpenWRT and other
platform doesn't use acl and this config is disable by default in
kernel. This patch use IS_ENABLED() to know acl config is enable and use
acl function if it is enable.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
---
Kconfig | 1 -
smb2pdu.c | 8 +++---
smbacl.c | 80 ++++++++++++++++++++++++++++++++-----------------------
vfs.c | 9 +++++++
4 files changed, 60 insertions(+), 38 deletions(-)
--- a/Kconfig
+++ b/Kconfig
@@ -19,7 +19,6 @@ config SMB_SERVER
select CRYPTO_GCM
select ASN1
select OID_REGISTRY
- select FS_POSIX_ACL
default n
help
Choose Y here if you want to allow SMB3 compliant clients
--- a/smb2pdu.c
+++ b/smb2pdu.c
@@ -2387,9 +2387,11 @@ static void ksmbd_acls_fattr(struct smb_
fattr->cf_mode = inode->i_mode;
fattr->cf_dacls = NULL;
- fattr->cf_acls = get_acl(inode, ACL_TYPE_ACCESS);
- if (S_ISDIR(inode->i_mode))
- fattr->cf_dacls = get_acl(inode, ACL_TYPE_DEFAULT);
+ if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
+ fattr->cf_acls = get_acl(inode, ACL_TYPE_ACCESS);
+ if (S_ISDIR(inode->i_mode))
+ fattr->cf_dacls = get_acl(inode, ACL_TYPE_DEFAULT);
+ }
}
/**
--- a/smbacl.c
+++ b/smbacl.c
@@ -533,22 +533,29 @@ static void parse_dacl(struct user_names
if (acl_state.users->n || acl_state.groups->n) {
acl_state.mask.allow = 0x07;
- fattr->cf_acls = posix_acl_alloc(acl_state.users->n +
- acl_state.groups->n + 4, GFP_KERNEL);
- if (fattr->cf_acls) {
- cf_pace = fattr->cf_acls->a_entries;
- posix_state_to_acl(&acl_state, cf_pace);
+
+ if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
+ fattr->cf_acls =
+ posix_acl_alloc(acl_state.users->n +
+ acl_state.groups->n + 4, GFP_KERNEL);
+ if (fattr->cf_acls) {
+ cf_pace = fattr->cf_acls->a_entries;
+ posix_state_to_acl(&acl_state, cf_pace);
+ }
}
}
if (default_acl_state.users->n || default_acl_state.groups->n) {
default_acl_state.mask.allow = 0x07;
- fattr->cf_dacls =
- posix_acl_alloc(default_acl_state.users->n +
- default_acl_state.groups->n + 4, GFP_KERNEL);
- if (fattr->cf_dacls) {
- cf_pdace = fattr->cf_dacls->a_entries;
- posix_state_to_acl(&default_acl_state, cf_pdace);
+
+ if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
+ fattr->cf_dacls =
+ posix_acl_alloc(default_acl_state.users->n +
+ default_acl_state.groups->n + 4, GFP_KERNEL);
+ if (fattr->cf_dacls) {
+ cf_pdace = fattr->cf_dacls->a_entries;
+ posix_state_to_acl(&default_acl_state, cf_pdace);
+ }
}
}
free_acl_state(&acl_state);
@@ -1221,31 +1228,36 @@ int smb_check_perm_dacl(struct ksmbd_con
granted = GENERIC_ALL_FLAGS;
}
- posix_acls = get_acl(d_inode(path->dentry), ACL_TYPE_ACCESS);
- if (posix_acls && !found) {
- unsigned int id = -1;
-
- pa_entry = posix_acls->a_entries;
- for (i = 0; i < posix_acls->a_count; i++, pa_entry++) {
- if (pa_entry->e_tag == ACL_USER)
- id = from_kuid(user_ns,
- pa_entry->e_uid);
- else if (pa_entry->e_tag == ACL_GROUP)
- id = from_kgid(user_ns,
- pa_entry->e_gid);
- else
- continue;
-
- if (id == uid) {
- mode_to_access_flags(pa_entry->e_perm, 0777, &access_bits);
- if (!access_bits)
- access_bits = SET_MINIMUM_RIGHTS;
- goto check_access_bits;
+ if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
+ posix_acls = get_acl(d_inode(path->dentry), ACL_TYPE_ACCESS);
+ if (posix_acls && !found) {
+ unsigned int id = -1;
+
+ pa_entry = posix_acls->a_entries;
+ for (i = 0; i < posix_acls->a_count; i++, pa_entry++) {
+ if (pa_entry->e_tag == ACL_USER)
+ id = from_kuid(user_ns,
+ pa_entry->e_uid);
+ else if (pa_entry->e_tag == ACL_GROUP)
+ id = from_kgid(user_ns,
+ pa_entry->e_gid);
+ else
+ continue;
+
+ if (id == uid) {
+ mode_to_access_flags(pa_entry->e_perm,
+ 0777,
+ &access_bits);
+ if (!access_bits)
+ access_bits =
+ SET_MINIMUM_RIGHTS;
+ goto check_access_bits;
+ }
}
}
+ if (posix_acls)
+ posix_acl_release(posix_acls);
}
- if (posix_acls)
- posix_acl_release(posix_acls);
if (!found) {
if (others_ace) {
@@ -1308,7 +1320,7 @@ int set_info_sec(struct ksmbd_conn *conn
ksmbd_vfs_remove_acl_xattrs(user_ns, path->dentry);
/* Update posix acls */
- if (fattr.cf_dacls) {
+ if (IS_ENABLED(CONFIG_FS_POSIX_ACL) && fattr.cf_dacls) {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 12, 0)
rc = set_posix_acl(user_ns, inode,
ACL_TYPE_ACCESS,
--- a/vfs.c
+++ b/vfs.c
@@ -1508,6 +1508,9 @@ static struct xattr_smb_acl *ksmbd_vfs_m
struct xattr_acl_entry *xa_entry;
int i;
+ if (!IS_ENABLED(CONFIG_FS_POSIX_ACL))
+ return NULL;
+
posix_acls = get_acl(inode, acl_type);
if (!posix_acls)
return NULL;
@@ -2322,6 +2325,9 @@ int ksmbd_vfs_set_init_posix_acl(struct
struct posix_acl *acls;
int rc;
+ if (!IS_ENABLED(CONFIG_FS_POSIX_ACL))
+ return -EOPNOTSUPP;
+
ksmbd_debug(SMB, "Set posix acls\n");
rc = init_acl_state(&acl_state, 1);
if (rc)
@@ -2377,6 +2383,9 @@ int ksmbd_vfs_inherit_posix_acl(struct u
struct posix_acl_entry *pace;
int rc, i;
+ if (!IS_ENABLED(CONFIG_FS_POSIX_ACL))
+ return -EOPNOTSUPP;
+
acls = get_acl(parent_inode, ACL_TYPE_DEFAULT);
if (!acls)
return -ENOENT;