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cifs: Use kuids and kgids SID to uid/gid mapping

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Update id_mode_to_cifs_acl to take a kuid_t and a kgid_t.

Replace NO_CHANGE_32 with INVALID_UID and INVALID_GID, and tests for
NO_CHANGE_32 with uid_valid and gid_valid.

Carefully unpack the value returned from request_key.  memcpy the
value into the expected type.  The convert the uid/gid into a
kuid/kgid.  And then only if the result is a valid kuid or kgid update
fuid/fgid.

Cc: Steve French <smfrench@gmail.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman
2013-02-06 00:33:17 -08:00
parent 8e3028b908
commit 8abf2775dd
4 changed files with 34 additions and 20 deletions
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8
fs/cifs/inode.c
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@@ -2090,8 +2090,8 @@ static int
cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
{
unsigned int xid;
uid_t uid = NO_CHANGE_32;
gid_t gid = NO_CHANGE_32;
kuid_t uid = INVALID_UID;
kgid_t gid = INVALID_GID;
struct inode *inode = direntry->d_inode;
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
struct cifsInodeInfo *cifsInode = CIFS_I(inode);
@@ -2150,7 +2150,7 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
#ifdef CONFIG_CIFS_ACL
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
if (uid != NO_CHANGE_32 || gid != NO_CHANGE_32) {
if (uid_valid(uid) || gid_valid(gid)) {
rc = id_mode_to_cifs_acl(inode, full_path, NO_CHANGE_64,
uid, gid);
if (rc) {
@@ -2174,7 +2174,7 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
#ifdef CONFIG_CIFS_ACL
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
rc = id_mode_to_cifs_acl(inode, full_path, mode,
NO_CHANGE_32, NO_CHANGE_32);
INVALID_UID, INVALID_GID);
if (rc) {
cFYI(1, "%s: Setting ACL failed with error: %d",
__func__, rc);