Messages in this thread Patch in this message | | | From | Long Li <> | Subject | [RFC PATCH 01/09] Introduce offset for the 1st page in data transfer structures | Date | Thu, 17 May 2018 17:22:06 -0700 |
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From: Long Li <longli@microsoft.com>
Currently CIFS allocates its own pages for data transfer, they don't need offset since it's always 0 in the 1st page.
Direct data transfer needs to define an offset because user-data may not start on the page boundary
Signed-off-by: Long Li <longli@microsoft.com> --- fs/cifs/cifsglob.h | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index cb950a5..a51855c 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -176,6 +176,7 @@ struct smb_rqst { struct kvec *rq_iov; /* array of kvecs */ unsigned int rq_nvec; /* number of kvecs in array */ struct page **rq_pages; /* pointer to array of page ptrs */ + unsigned int rq_offset; /* the offset to the 1st page */ unsigned int rq_npages; /* number pages in array */ unsigned int rq_pagesz; /* page size to use */ unsigned int rq_tailsz; /* length of last page */ @@ -1167,8 +1168,10 @@ struct cifs_readdata { struct kvec iov[2]; #ifdef CONFIG_CIFS_SMB_DIRECT struct smbd_mr *mr; + struct page **direct_pages; #endif unsigned int pagesz; + unsigned int page_offset; unsigned int tailsz; unsigned int credits; unsigned int nr_pages; @@ -1192,8 +1195,10 @@ struct cifs_writedata { int result; #ifdef CONFIG_CIFS_SMB_DIRECT struct smbd_mr *mr; + struct page **direct_pages; #endif unsigned int pagesz; + unsigned int page_offset; unsigned int tailsz; unsigned int credits; unsigned int nr_pages; -- 2.7.4
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