Re: [PATCH] cifs: fix return code when failing to rename a file onto a directory

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Hmm,

Steve, disregard and drop this patch.


We can do this much better once we have compounding support.


On Mon, Nov 20, 2017 at 3:25 PM, Ronnie Sahlberg <lsahlber@xxxxxxxxxx> wrote:
> Cifs servers return ACCESS_DENIED when trying to rename onto a non-empty
> directory. This is different from xfstest where we expect this to return
> -EEXIST instead.
>
> This makes us pass xfstest  generic/245
>
> Signed-off-by: Ronnie Sahlberg <lsahlber@xxxxxxxxxx>
> ---
>  fs/cifs/smb2inode.c |  7 +++++--
>  fs/cifs/smb2pdu.c   | 10 +++++++++-
>  fs/cifs/smb2proto.h |  2 +-
>  3 files changed, 15 insertions(+), 4 deletions(-)
>
> diff --git a/fs/cifs/smb2inode.c b/fs/cifs/smb2inode.c
> index 1238cd3552f9..6ada981f1f83 100644
> --- a/fs/cifs/smb2inode.c
> +++ b/fs/cifs/smb2inode.c
> @@ -48,6 +48,7 @@ smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon,
>         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
>         struct cifs_open_parms oparms;
>         struct cifs_fid fid;
> +       struct smb2_file_all_info all_info;
>
>         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
>         if (!utf16_path)
> @@ -60,7 +61,7 @@ smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon,
>         oparms.fid = &fid;
>         oparms.reconnect = false;
>
> -       rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
> +       rc = SMB2_open(xid, &oparms, utf16_path, &oplock, &all_info, NULL);
>         if (rc) {
>                 kfree(utf16_path);
>                 return rc;
> @@ -86,7 +87,9 @@ smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon,
>                 break;
>         case SMB2_OP_RENAME:
>                 tmprc = SMB2_rename(xid, tcon, fid.persistent_fid,
> -                                   fid.volatile_fid, (__le16 *)data);
> +                                   fid.volatile_fid, (__le16 *)data,
> +                                   le32_to_cpu(all_info.Attributes) &
> +                                   FILE_ATTRIBUTE_DIRECTORY);
>                 break;
>         case SMB2_OP_HARDLINK:
>                 tmprc = SMB2_set_hardlink(xid, tcon, fid.persistent_fid,
> diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
> index 553d574940b9..56c71a58d971 100644
> --- a/fs/cifs/smb2pdu.c
> +++ b/fs/cifs/smb2pdu.c
> @@ -3139,7 +3139,8 @@ send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
>
>  int
>  SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
> -           u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
> +           u64 persistent_fid, u64 volatile_fid, __le16 *target_file,
> +           bool is_dir)
>  {
>         struct smb2_file_rename_info info;
>         void **data;
> @@ -3165,6 +3166,13 @@ SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
>         rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
>                 current->tgid, FILE_RENAME_INFORMATION, SMB2_O_INFO_FILE,
>                 0, 2, data, size);
> +       /* SMB2 servers responds with ACCESS_DENIED when trying to rename
> +        * and replace onto a non-empty directory. Check for this and remap
> +        * to EEXIST.
> +        */
> +       if (rc == -EACCES && is_dir)
> +               rc = -EEXIST;
> +
>         kfree(data);
>         return rc;
>  }
> diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
> index e9ab5227e7a8..69fa9a39c7fa 100644
> --- a/fs/cifs/smb2proto.h
> +++ b/fs/cifs/smb2proto.h
> @@ -158,7 +158,7 @@ extern int SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
>                                 struct cifs_search_info *srch_inf);
>  extern int SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
>                        u64 persistent_fid, u64 volatile_fid,
> -                      __le16 *target_file);
> +                      __le16 *target_file, bool is_dir);
>  extern int SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
>                       u64 persistent_fid, u64 volatile_fid);
>  extern int SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
> --
> 2.13.3
>
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