From: Pali Rohár <pali@kernel.org>
Date: Mon, 14 Oct 2024 13:18:04 +0000 (+0200)
Subject: cifs: Change translation of STATUS_NOT_A_REPARSE_POINT to -ENODATA
X-Git-Tag: v6.14-rc1~5^2~20
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f764fab72d98833b47d389ac2ed35bd000132d87;p=thirdparty%2Fkernel%2Flinux.git

cifs: Change translation of STATUS_NOT_A_REPARSE_POINT to -ENODATA

STATUS_NOT_A_REPARSE_POINT indicates that object does not have reparse point
buffer attached, for example returned by FSCTL_GET_REPARSE_POINT.

Currently STATUS_NOT_A_REPARSE_POINT is translated to -EIO. Change it to
-ENODATA which better describe the situation when no reparse point is set.

Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
---

diff --git a/fs/smb/client/netmisc.c b/fs/smb/client/netmisc.c
index 17b3e21ea8689..9dc16211e7a13 100644
--- a/fs/smb/client/netmisc.c
+++ b/fs/smb/client/netmisc.c
@@ -871,6 +871,13 @@ map_smb_to_linux_error(char *buf, bool logErr)
 	}
 	/* else ERRHRD class errors or junk  - return EIO */
 
+	/* special cases for NT status codes which cannot be translated to DOS codes */
+	if (smb->Flags2 & SMBFLG2_ERR_STATUS) {
+		__u32 err = le32_to_cpu(smb->Status.CifsError);
+		if (err == (NT_STATUS_NOT_A_REPARSE_POINT))
+			rc = -ENODATA;
+	}
+
 	cifs_dbg(FYI, "Mapping smb error code 0x%x to POSIX err %d\n",
 		 le32_to_cpu(smb->Status.CifsError), rc);
 
diff --git a/fs/smb/client/nterr.c b/fs/smb/client/nterr.c
index d396a8e98a81c..8f0bc441295ef 100644
--- a/fs/smb/client/nterr.c
+++ b/fs/smb/client/nterr.c
@@ -674,6 +674,7 @@ const struct nt_err_code_struct nt_errs[] = {
 	{"NT_STATUS_QUOTA_LIST_INCONSISTENT",
 	 NT_STATUS_QUOTA_LIST_INCONSISTENT},
 	{"NT_STATUS_FILE_IS_OFFLINE", NT_STATUS_FILE_IS_OFFLINE},
+	{"NT_STATUS_NOT_A_REPARSE_POINT", NT_STATUS_NOT_A_REPARSE_POINT},
 	{"NT_STATUS_NO_MORE_ENTRIES", NT_STATUS_NO_MORE_ENTRIES},
 	{"NT_STATUS_MORE_ENTRIES", NT_STATUS_MORE_ENTRIES},
 	{"NT_STATUS_SOME_UNMAPPED", NT_STATUS_SOME_UNMAPPED},
diff --git a/fs/smb/client/nterr.h b/fs/smb/client/nterr.h
index edd4741cab0a1..180602c22355e 100644
--- a/fs/smb/client/nterr.h
+++ b/fs/smb/client/nterr.h
@@ -546,6 +546,7 @@ extern const struct nt_err_code_struct nt_errs[];
 #define NT_STATUS_TOO_MANY_LINKS 0xC0000000 | 0x0265
 #define NT_STATUS_QUOTA_LIST_INCONSISTENT 0xC0000000 | 0x0266
 #define NT_STATUS_FILE_IS_OFFLINE 0xC0000000 | 0x0267
+#define NT_STATUS_NOT_A_REPARSE_POINT 0xC0000000 | 0x0275
 #define NT_STATUS_NO_SUCH_JOB 0xC0000000 | 0xEDE	/* scheduler */
 
 #endif				/* _NTERR_H */
diff --git a/fs/smb/client/smb2maperror.c b/fs/smb/client/smb2maperror.c
index b05313acf9b2b..612e7b5181b6c 100644
--- a/fs/smb/client/smb2maperror.c
+++ b/fs/smb/client/smb2maperror.c
@@ -871,7 +871,7 @@ static const struct status_to_posix_error smb2_error_map_table[] = {
 	{STATUS_VALIDATE_CONTINUE, -EIO, "STATUS_VALIDATE_CONTINUE"},
 	{STATUS_NO_MATCH, -EIO, "STATUS_NO_MATCH"},
 	{STATUS_NO_MORE_MATCHES, -EIO, "STATUS_NO_MORE_MATCHES"},
-	{STATUS_NOT_A_REPARSE_POINT, -EIO, "STATUS_NOT_A_REPARSE_POINT"},
+	{STATUS_NOT_A_REPARSE_POINT, -ENODATA, "STATUS_NOT_A_REPARSE_POINT"},
 	{STATUS_IO_REPARSE_TAG_INVALID, -EIO, "STATUS_IO_REPARSE_TAG_INVALID"},
 	{STATUS_IO_REPARSE_TAG_MISMATCH, -EIO,
 	"STATUS_IO_REPARSE_TAG_MISMATCH"},