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| author | Akinobu Mita <akinobu.mita@gmail.com> | 2015-04-11 13:17:31 +0900 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2015-04-14 12:37:42 -0700 |
| commit | bfd9a53e0110442eeef670227907bdd14def94e1 (patch) | |
| tree | b725f4a0aa3f27bd7497515a21bba4cd7e002de9 /mm/vmacache.c | |
| parent | 054922bb3549abbea9ed2c1a78a1e331343cc05e (diff) | |
| download | linux-bfd9a53e0110442eeef670227907bdd14def94e1.tar.bz2 | |
target/rd: Don't pass incomplete scatterlist entries to sbc_dif_verify_*
The scatterlist for protection information which is passed to
sbc_dif_verify_read() or sbc_dif_verify_write() requires that
neighboring scatterlist entries are contiguous or chained so that they
can be iterated by sg_next().
However, the protection information for RD-MCP backends could be located
in the multiple scatterlist arrays when the ramdisk space is too large.
So if the read/write request straddles this boundary, sbc_dif_verify_read()
or sbc_dif_verify_write() can't iterate all scatterlist entries.
This problem can be fixed by chaining protection information scatterlist
at creation time. For the architectures which don't support sg chaining
(i.e. !CONFIG_ARCH_HAS_SG_CHAIN), fix it by allocating temporary
scatterlist if needed.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Sagi Grimberg <sagig@dev.mellanox.co.il>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: target-devel@vger.kernel.org
Cc: linux-scsi@vger.kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'mm/vmacache.c')
0 files changed, 0 insertions, 0 deletions