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| author | David Howells <dhowells@redhat.com> | 2022-05-27 13:45:28 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2023-12-28 09:45:19 +0000 |
| commit | 768ddb1eacf5dd997ecf393e7bab9796bad047e0 (patch) | |
| tree | 95eca7d52ed1166adc05c97b0ecf3862d3172a43 /include/linux/netfs.h | |
| parent | cae932d3aee55035a54415dcea8e7ecf2ec469b5 (diff) | |
| download | linux-768ddb1eacf5dd997ecf393e7bab9796bad047e0.tar.gz linux-768ddb1eacf5dd997ecf393e7bab9796bad047e0.tar.bz2 linux-768ddb1eacf5dd997ecf393e7bab9796bad047e0.zip | |
netfs: Limit subrequest by size or number of segments
Limit a subrequest to a maximum size and/or a maximum number of contiguous
physical regions. This permits, for instance, an subreq's iterator to be
limited to the number of DMA'able segments that a large RDMA request can
handle.
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
cc: linux-cachefs@redhat.com
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
Diffstat (limited to 'include/linux/netfs.h')
| -rw-r--r-- | include/linux/netfs.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/netfs.h b/include/linux/netfs.h index d673d0785b9d..44cd13ad695a 100644 --- a/include/linux/netfs.h +++ b/include/linux/netfs.h @@ -161,6 +161,7 @@ struct netfs_io_subrequest { refcount_t ref; short error; /* 0 or error that occurred */ unsigned short debug_index; /* Index in list (for debugging output) */ + unsigned int max_nr_segs; /* 0 or max number of segments in an iterator */ enum netfs_io_source source; /* Where to read from/write to */ unsigned long flags; #define NETFS_SREQ_COPY_TO_CACHE 0 /* Set if should copy the data to the cache */ |