Ronnie Sahlberg 2f94f16d02 iovectors: don't reset nalloc when resetting an iovector ...

Don't reset nalloc when resetting an iovector during reconnect.
Resetting offset/consumed should be sufficient.

Also, don't reset the iovectors when we detect an error condition in
iscsi_iovector_readv_writev. If there is a bug feeding an invalid
pos into this function, where pos suddently points before the amount
of data we have already read/written, then singlan this as an error
and return -EINVAL.

Previosly we did not reset the iovectors correctly when we re-queued
PDUs after a reconnect and thus relied on the iovectors being automatically
reset if/when we detected this type of error in readv_writev.
Now we do reset the iovectors properly so we do nt need to atuo reset them
here anymore and we can change this check to test for and abort the transfer
if an error is detected.

Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>

2015-03-22 08:20:29 -07:00

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