target/user: Refactor data area allocation code

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Introduce alloc_and_scatter_data_area()/gather_and_free_data_area()
functions that allocate/deallocate space from the data area and copy
data to/from a given scatter-gather list. These functions are needed so
the next patch, introducing support for bidirectional commands in TCMU,
can use the same code path both for t_data_sg and for t_bidi_data_sg.

Signed-off-by: Ilias Tsitsimpis <iliastsi@arrikto.com>
Signed-off-by: Vangelis Koukis <vkoukis@arrikto.com>
Reviewed-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

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Ilias Tsitsimpis 2015-04-23 21:47:00 +03:00 • committed by Nicholas Bellinger

parent b32bd0a8ee

commit f97ec7db16

1 changed files with 106 additions and 83 deletions

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drivers/target/target_core_user.c

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