cifs: add and use CIFSSMBUnixSetFileInfo for setattr calls

cifs: add and use CIFSSMBUnixSetFileInfo for setattr calls

When there's an open filehandle, SET_FILE_INFO is apparently preferred
over SET_PATH_INFO. Add a new variant that sets a FILE_UNIX_INFO_BASIC
infolevel via SET_FILE_INFO and switch cifs_setattr_unix to use the
new call when there's an open filehandle available.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index d95fd42..37c11c0 100644 (file)
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -220,6 +220,10 @@ struct cifs_unix_set_info_args {
        dev_t   device;
 };
 
+extern int CIFSSMBUnixSetFileInfo(const int xid, struct cifsTconInfo *tcon,
+                                 const struct cifs_unix_set_info_args *args,
+                                 u16 fid, u32 pid_of_opener);
+
 extern int CIFSSMBUnixSetPathInfo(const int xid, struct cifsTconInfo *pTcon,
                        char *fileName,
                        const struct cifs_unix_set_info_args *args,

diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 1f3c8a4..922f5fe 100644 (file)
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -5115,6 +5115,69 @@ cifs_fill_unix_set_info(FILE_UNIX_BASIC_INFO *data_offset,
                data_offset->Type = cpu_to_le32(UNIX_SOCKET);
 }
 
+int
+CIFSSMBUnixSetFileInfo(const int xid, struct cifsTconInfo *tcon,
+                      const struct cifs_unix_set_info_args *args,
+                      u16 fid, u32 pid_of_opener)
+{
+       struct smb_com_transaction2_sfi_req *pSMB  = NULL;
+       FILE_UNIX_BASIC_INFO *data_offset;
+       int rc = 0;
+       u16 params, param_offset, offset, byte_count, count;
+
+       cFYI(1, ("Set Unix Info (via SetFileInfo)"));
+       rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB);
+
+       if (rc)
+               return rc;
+
+       pSMB->hdr.Pid = cpu_to_le16((__u16)pid_of_opener);
+       pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid_of_opener >> 16));
+
+       params = 6;
+       pSMB->MaxSetupCount = 0;
+       pSMB->Reserved = 0;
+       pSMB->Flags = 0;
+       pSMB->Timeout = 0;
+       pSMB->Reserved2 = 0;
+       param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
+       offset = param_offset + params;
+
+       data_offset = (FILE_UNIX_BASIC_INFO *)
+                               ((char *)(&pSMB->hdr.Protocol) + offset);
+       count = sizeof(FILE_UNIX_BASIC_INFO);
+
+       pSMB->MaxParameterCount = cpu_to_le16(2);
+       /* BB find max SMB PDU from sess */
+       pSMB->MaxDataCount = cpu_to_le16(1000);
+       pSMB->SetupCount = 1;
+       pSMB->Reserved3 = 0;
+       pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
+       byte_count = 3 /* pad */  + params + count;
+       pSMB->DataCount = cpu_to_le16(count);
+       pSMB->ParameterCount = cpu_to_le16(params);
+       pSMB->TotalDataCount = pSMB->DataCount;
+       pSMB->TotalParameterCount = pSMB->ParameterCount;
+       pSMB->ParameterOffset = cpu_to_le16(param_offset);
+       pSMB->DataOffset = cpu_to_le16(offset);
+       pSMB->Fid = fid;
+       pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_UNIX_BASIC);
+       pSMB->Reserved4 = 0;
+       pSMB->hdr.smb_buf_length += byte_count;
+       pSMB->ByteCount = cpu_to_le16(byte_count);
+
+       cifs_fill_unix_set_info(data_offset, args);
+
+       rc = SendReceiveNoRsp(xid, tcon->ses, (struct smb_hdr *) pSMB, 0);
+       if (rc)
+               cFYI(1, ("Send error in Set Time (SetFileInfo) = %d", rc));
+
+       /* Note: On -EAGAIN error only caller can retry on handle based calls
+               since file handle passed in no longer valid */
+
+       return rc;
+}
+
 int
 CIFSSMBUnixSetPathInfo(const int xid, struct cifsTconInfo *tcon, char *fileName,
                       const struct cifs_unix_set_info_args *args,

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index ad19007..55b616b 100644 (file)
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1790,6 +1790,7 @@ cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
        struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
        struct cifsTconInfo *pTcon = cifs_sb->tcon;
        struct cifs_unix_set_info_args *args = NULL;
+       struct cifsFileInfo *open_file;
 
        cFYI(1, ("setattr_unix on file %s attrs->ia_valid=0x%x",
                 direntry->d_name.name, attrs->ia_valid));
@@ -1876,10 +1877,18 @@ cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
                args->ctime = NO_CHANGE_64;
 
        args->device = 0;
-       rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
+       open_file = find_writable_file(cifsInode);
+       if (open_file) {
+               u16 nfid = open_file->netfid;
+               u32 npid = open_file->pid;
+               rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
+               atomic_dec(&open_file->wrtPending);
+       } else {
+               rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
                                    cifs_sb->local_nls,
                                    cifs_sb->mnt_cifs_flags &
                                        CIFS_MOUNT_MAP_SPECIAL_CHR);
+       }
 
        if (!rc)
                rc = inode_setattr(inode, attrs);