add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/cifs/ioctl.c
..
..
@@ -32,7 +32,50 @@
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 #include "cifs_debug.h"
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 #include "cifsfs.h"
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 #include "cifs_ioctl.h"
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+#include "smb2proto.h"
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 #include <linux/btrfs.h>
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+
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+static long cifs_ioctl_query_info(unsigned int xid, struct file *filep,
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+				  unsigned long p)
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+{
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+	struct inode *inode = file_inode(filep);
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+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
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+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
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+	struct dentry *dentry = filep->f_path.dentry;
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+	unsigned char *path;
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+	__le16 *utf16_path = NULL, root_path;
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+	int rc = 0;
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+
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+	path = build_path_from_dentry(dentry);
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+	if (path == NULL)
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+		return -ENOMEM;
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+
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+	cifs_dbg(FYI, "%s %s\n", __func__, path);
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+
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+	if (!path[0]) {
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+		root_path = 0;
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+		utf16_path = &root_path;
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+	} else {
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+		utf16_path = cifs_convert_path_to_utf16(path + 1, cifs_sb);
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+		if (!utf16_path) {
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+			rc = -ENOMEM;
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+			goto ici_exit;
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+		}
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+	}
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+
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+	if (tcon->ses->server->ops->ioctl_query_info)
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+		rc = tcon->ses->server->ops->ioctl_query_info(
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+				xid, tcon, cifs_sb, utf16_path,
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+				filep->private_data ? 0 : 1, p);
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+	else
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+		rc = -EOPNOTSUPP;
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+
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+ ici_exit:
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+	if (utf16_path != &root_path)
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+		kfree(utf16_path);
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+	kfree(path);
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+	return rc;
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+}
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 static long cifs_ioctl_copychunk(unsigned int xid, struct file *dst_file,
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 			unsigned long srcfd)
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@@ -121,17 +164,18 @@
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 long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
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 {
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 	struct inode *inode = file_inode(filep);
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+	struct smb3_key_debug_info pkey_inf;
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 	int rc = -ENOTTY; /* strange error - but the precedent */
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 	unsigned int xid;
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-	struct cifs_sb_info *cifs_sb;
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 	struct cifsFileInfo *pSMBFile = filep->private_data;
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 	struct cifs_tcon *tcon;
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+	struct tcon_link *tlink;
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+	struct cifs_sb_info *cifs_sb;
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 	__u64	ExtAttrBits = 0;
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 	__u64   caps;
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 	xid = get_xid();
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-	cifs_sb = CIFS_SB(inode->i_sb);
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 	cifs_dbg(FYI, "cifs ioctl 0x%x\n", command);
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 	switch (command) {
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 		case FS_IOC_GETFLAGS:
..
..
@@ -149,7 +193,7 @@
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 					rc = put_user(ExtAttrBits &
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 						FS_FL_USER_VISIBLE,
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 						(int __user *)arg);
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-				if (rc != EOPNOTSUPP)
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+				if (rc != -EOPNOTSUPP)
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 					break;
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 			}
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 #endif /* CONFIG_CIFS_POSIX */
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@@ -178,7 +222,7 @@
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 			 *		       pSMBFile->fid.netfid,
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 			 *		       extAttrBits,
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 			 *		       &ExtAttrMask);
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-			 * if (rc != EOPNOTSUPP)
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+			 * if (rc != -EOPNOTSUPP)
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 			 *	break;
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 			 */
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..
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@@ -195,6 +239,9 @@
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 			break;
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 		case CIFS_IOC_COPYCHUNK_FILE:
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 			rc = cifs_ioctl_copychunk(xid, filep, arg);
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+			break;
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+		case CIFS_QUERY_INFO:
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+			rc = cifs_ioctl_query_info(xid, filep, arg);
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 			break;
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 		case CIFS_IOC_SET_INTEGRITY:
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 			if (pSMBFile == NULL)
..
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@@ -226,6 +273,55 @@
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 			else
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 				rc = -EOPNOTSUPP;
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 			break;
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+		case CIFS_DUMP_KEY:
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+			if (pSMBFile == NULL)
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+				break;
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+			if (!capable(CAP_SYS_ADMIN)) {
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+				rc = -EACCES;
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+				break;
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+			}
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+
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+			tcon = tlink_tcon(pSMBFile->tlink);
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+			if (!smb3_encryption_required(tcon)) {
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+				rc = -EOPNOTSUPP;
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+				break;
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+			}
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+			pkey_inf.cipher_type =
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+				le16_to_cpu(tcon->ses->server->cipher_type);
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+			pkey_inf.Suid = tcon->ses->Suid;
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+			memcpy(pkey_inf.auth_key, tcon->ses->auth_key.response,
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+					16 /* SMB2_NTLMV2_SESSKEY_SIZE */);
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+			memcpy(pkey_inf.smb3decryptionkey,
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+			      tcon->ses->smb3decryptionkey, SMB3_SIGN_KEY_SIZE);
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+			memcpy(pkey_inf.smb3encryptionkey,
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+			      tcon->ses->smb3encryptionkey, SMB3_SIGN_KEY_SIZE);
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+			if (copy_to_user((void __user *)arg, &pkey_inf,
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+					sizeof(struct smb3_key_debug_info)))
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+				rc = -EFAULT;
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+			else
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+				rc = 0;
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+			break;
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+		case CIFS_IOC_NOTIFY:
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+			if (!S_ISDIR(inode->i_mode)) {
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+				/* Notify can only be done on directories */
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+				rc = -EOPNOTSUPP;
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+				break;
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+			}
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+			cifs_sb = CIFS_SB(inode->i_sb);
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+			tlink = cifs_sb_tlink(cifs_sb);
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+			if (IS_ERR(tlink)) {
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+				rc = PTR_ERR(tlink);
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+				break;
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+			}
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+			tcon = tlink_tcon(tlink);
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+			if (tcon && tcon->ses->server->ops->notify) {
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+				rc = tcon->ses->server->ops->notify(xid,
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+						filep, (void __user *)arg);
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+				cifs_dbg(FYI, "ioctl notify rc %d\n", rc);
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+			} else
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+				rc = -EOPNOTSUPP;
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+			cifs_put_tlink(tlink);
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+			break;
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 		default:
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 			cifs_dbg(FYI, "unsupported ioctl\n");
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 			break;