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    pnfs-obj: report errors and .encode_layoutreturn Implementation. · adb58535
    Boaz Harrosh 提交于
    An io_state pre-allocates an error information structure for each
    possible osd-device that might error during IO. When IO is done if all
    was well the io_state is freed. (as today). If the I/O has ended with an
    error, the io_state is queued on a per-layout err_list. When eventually
    encode_layoutreturn() is called, each error is properly encoded on the
    XDR buffer and only then the io_state is removed from err_list and
    de-allocated.
    
    It is up to the io_engine to fill in the segment that fault and the type
    of osd_error that occurred. By calling objlayout_io_set_result() for
    each failing device.
    
    In objio_osd:
    * Allocate io-error descriptors space as part of io_state
    * Use generic objlayout error reporting at end of io.
    Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
    Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
    adb58535
objlayout.h 5.0 KB