修改led为gpio

hc

2024-10-12 a5969cabbb4660eab42b6ef0412cbbd1200cf14d

 kernel/fs/cifs/xattr.c
..
..
@@ -32,7 +32,8 @@
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 #include "cifs_unicode.h"
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 #define MAX_EA_VALUE_SIZE CIFSMaxBufSize
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-#define CIFS_XATTR_CIFS_ACL "system.cifs_acl"
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+#define CIFS_XATTR_CIFS_ACL "system.cifs_acl" /* DACL only */
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+#define CIFS_XATTR_CIFS_NTSD "system.cifs_ntsd" /* owner plus DACL */
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 #define CIFS_XATTR_ATTRIB "cifs.dosattrib"  /* full name: user.cifs.dosattrib */
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 #define CIFS_XATTR_CREATETIME "cifs.creationtime"  /* user.cifs.creationtime */
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 /*
..
..
@@ -40,12 +41,62 @@
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  * confusing users and using the 20+ year old term 'cifs' when it is no longer
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  * secure, replaced by SMB2 (then even more highly secure SMB3) many years ago
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  */
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-#define SMB3_XATTR_CIFS_ACL "system.smb3_acl"
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+#define SMB3_XATTR_CIFS_ACL "system.smb3_acl" /* DACL only */
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+#define SMB3_XATTR_CIFS_NTSD "system.smb3_ntsd" /* owner plus DACL */
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 #define SMB3_XATTR_ATTRIB "smb3.dosattrib"  /* full name: user.smb3.dosattrib */
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 #define SMB3_XATTR_CREATETIME "smb3.creationtime"  /* user.smb3.creationtime */
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 /* BB need to add server (Samba e.g) support for security and trusted prefix */
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-enum { XATTR_USER, XATTR_CIFS_ACL, XATTR_ACL_ACCESS, XATTR_ACL_DEFAULT };
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+enum { XATTR_USER, XATTR_CIFS_ACL, XATTR_ACL_ACCESS, XATTR_ACL_DEFAULT,
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+	XATTR_CIFS_NTSD };
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+
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+static int cifs_attrib_set(unsigned int xid, struct cifs_tcon *pTcon,
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+			   struct inode *inode, char *full_path,
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+			   const void *value, size_t size)
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+{
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+	ssize_t rc = -EOPNOTSUPP;
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+	__u32 *pattrib = (__u32 *)value;
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+	__u32 attrib;
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+	FILE_BASIC_INFO info_buf;
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+
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+	if ((value == NULL) || (size != sizeof(__u32)))
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+		return -ERANGE;
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+
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+	memset(&info_buf, 0, sizeof(info_buf));
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+	attrib = *pattrib;
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+	info_buf.Attributes = cpu_to_le32(attrib);
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+	if (pTcon->ses->server->ops->set_file_info)
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+		rc = pTcon->ses->server->ops->set_file_info(inode, full_path,
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+				&info_buf, xid);
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+	if (rc == 0)
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+		CIFS_I(inode)->cifsAttrs = attrib;
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+
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+	return rc;
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+}
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+
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+static int cifs_creation_time_set(unsigned int xid, struct cifs_tcon *pTcon,
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+				  struct inode *inode, char *full_path,
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+				  const void *value, size_t size)
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+{
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+	ssize_t rc = -EOPNOTSUPP;
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+	__u64 *pcreation_time = (__u64 *)value;
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+	__u64 creation_time;
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+	FILE_BASIC_INFO info_buf;
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+
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+	if ((value == NULL) || (size != sizeof(__u64)))
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+		return -ERANGE;
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+
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+	memset(&info_buf, 0, sizeof(info_buf));
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+	creation_time = *pcreation_time;
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+	info_buf.CreationTime = cpu_to_le64(creation_time);
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+	if (pTcon->ses->server->ops->set_file_info)
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+		rc = pTcon->ses->server->ops->set_file_info(inode, full_path,
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+				&info_buf, xid);
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+	if (rc == 0)
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+		CIFS_I(inode)->createtime = creation_time;
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+
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+	return rc;
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+}
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 static int cifs_xattr_set(const struct xattr_handler *handler,
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 			  struct dentry *dentry, struct inode *inode,
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@@ -86,6 +137,23 @@
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 	switch (handler->flags) {
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 	case XATTR_USER:
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+		cifs_dbg(FYI, "%s:setting user xattr %s\n", __func__, name);
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+		if ((strcmp(name, CIFS_XATTR_ATTRIB) == 0) ||
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+		    (strcmp(name, SMB3_XATTR_ATTRIB) == 0)) {
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+			rc = cifs_attrib_set(xid, pTcon, inode, full_path,
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+					value, size);
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+			if (rc == 0) /* force revalidate of the inode */
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+				CIFS_I(inode)->time = 0;
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+			break;
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+		} else if ((strcmp(name, CIFS_XATTR_CREATETIME) == 0) ||
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+			   (strcmp(name, SMB3_XATTR_CREATETIME) == 0)) {
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+			rc = cifs_creation_time_set(xid, pTcon, inode,
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+					full_path, value, size);
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+			if (rc == 0) /* force revalidate of the inode */
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+				CIFS_I(inode)->time = 0;
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+			break;
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+		}
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+
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 		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
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 			goto out;
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@@ -95,8 +163,8 @@
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 				cifs_sb->local_nls, cifs_sb);
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 		break;
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-	case XATTR_CIFS_ACL: {
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-#ifdef CONFIG_CIFS_ACL
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+	case XATTR_CIFS_ACL:
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+	case XATTR_CIFS_NTSD: {
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 		struct cifs_ntsd *pacl;
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 		if (!value)
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@@ -107,17 +175,29 @@
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 		} else {
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 			memcpy(pacl, value, size);
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 			if (value &&
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-			    pTcon->ses->server->ops->set_acl)
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-				rc = pTcon->ses->server->ops->set_acl(pacl,
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-						size, inode,
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-						full_path, CIFS_ACL_DACL);
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-			else
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+			    pTcon->ses->server->ops->set_acl) {
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+				rc = 0;
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+				if (handler->flags == XATTR_CIFS_NTSD) {
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+					/* set owner and DACL */
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+					rc = pTcon->ses->server->ops->set_acl(
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+							pacl, size, inode,
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+							full_path,
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+							CIFS_ACL_OWNER);
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+				}
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+				if (rc == 0) {
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+					/* set DACL */
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+					rc = pTcon->ses->server->ops->set_acl(
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+							pacl, size, inode,
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+							full_path,
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+							CIFS_ACL_DACL);
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+				}
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+			} else {
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 				rc = -EOPNOTSUPP;
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+			}
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 			if (rc == 0) /* force revalidate of the inode */
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 				CIFS_I(inode)->time = 0;
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 			kfree(pacl);
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 		}
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-#endif /* CONFIG_CIFS_ACL */
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 		break;
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 	}
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@@ -181,7 +261,7 @@
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 				  void *value, size_t size)
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 {
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 	ssize_t rc;
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-	__u64 * pcreatetime;
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+	__u64 *pcreatetime;
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 	rc = cifs_revalidate_dentry_attr(dentry);
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 	if (rc)
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@@ -201,7 +281,7 @@
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 static int cifs_xattr_get(const struct xattr_handler *handler,
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 			  struct dentry *dentry, struct inode *inode,
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-			  const char *name, void *value, size_t size)
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+			  const char *name, void *value, size_t size, int flags)
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 {
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 	ssize_t rc = -EOPNOTSUPP;
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 	unsigned int xid;
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@@ -246,8 +326,9 @@
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 				full_path, name, value, size, cifs_sb);
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 		break;
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-	case XATTR_CIFS_ACL: {
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-#ifdef CONFIG_CIFS_ACL
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+	case XATTR_CIFS_ACL:
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+	case XATTR_CIFS_NTSD: {
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+		/* the whole ntsd is fetched regardless */
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 		u32 acllen;
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 		struct cifs_ntsd *pacl;
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@@ -270,7 +351,6 @@
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 			rc = acllen;
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 			kfree(pacl);
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 		}
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-#endif  /* CONFIG_CIFS_ACL */
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 		break;
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 	}
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@@ -386,6 +466,26 @@
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 	.set = cifs_xattr_set,
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 };
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+static const struct xattr_handler cifs_cifs_ntsd_xattr_handler = {
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+	.name = CIFS_XATTR_CIFS_NTSD,
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+	.flags = XATTR_CIFS_NTSD,
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+	.get = cifs_xattr_get,
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+	.set = cifs_xattr_set,
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+};
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+
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+/*
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+ * Although this is just an alias for the above, need to move away from
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+ * confusing users and using the 20 year old term 'cifs' when it is no
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+ * longer secure and was replaced by SMB2/SMB3 a long time ago, and
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+ * SMB3 and later are highly secure.
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+ */
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+static const struct xattr_handler smb3_ntsd_xattr_handler = {
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+	.name = SMB3_XATTR_CIFS_NTSD,
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+	.flags = XATTR_CIFS_NTSD,
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+	.get = cifs_xattr_get,
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+	.set = cifs_xattr_set,
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+};
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+
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 static const struct xattr_handler cifs_posix_acl_access_xattr_handler = {
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 	.name = XATTR_NAME_POSIX_ACL_ACCESS,
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 	.flags = XATTR_ACL_ACCESS,
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@@ -405,6 +505,8 @@
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 	&cifs_os2_xattr_handler,
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 	&cifs_cifs_acl_xattr_handler,
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 	&smb3_acl_xattr_handler, /* alias for above since avoiding "cifs" */
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+	&cifs_cifs_ntsd_xattr_handler,
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+	&smb3_ntsd_xattr_handler, /* alias for above since avoiding "cifs" */
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 	&cifs_posix_acl_access_xattr_handler,
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 	&cifs_posix_acl_default_xattr_handler,
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 	NULL