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| author | Dave Chinner <dchinner@redhat.com> | 2010-03-23 11:43:17 +1100 |
|---|---|---|
| committer | Alex Elder <aelder@sgi.com> | 2010-05-19 09:58:10 -0500 |
| commit | 55b66332d0921146a914d5d75a7b870a65dc4938 (patch) | |
| tree | 254f130969b118cc777371691e892db20e96b5a6 /fs/xfs/xfs_log.h | |
| parent | 99428ad0f665a5d5b245ab36cefb6b231d977e73 (diff) | |
| download | lwn-55b66332d0921146a914d5d75a7b870a65dc4938.tar.gz lwn-55b66332d0921146a914d5d75a7b870a65dc4938.zip | |
xfs: introduce new internal log vector structure
The current log IO vector structure is a flat array and not
extensible. To make it possible to keep separate log IO vectors for
individual log items, we need a method of chaining log IO vectors
together.
Introduce a new log vector type that can be used to wrap the
existing log IO vectors on use that internally to the log. This
means that the existing external interface (xfs_log_write) does not
change and hence no changes to the transaction commit code are
required.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Diffstat (limited to 'fs/xfs/xfs_log.h')
| -rw-r--r-- | fs/xfs/xfs_log.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/xfs/xfs_log.h b/fs/xfs/xfs_log.h index f3a564d298d0..229d1f36ba9a 100644 --- a/fs/xfs/xfs_log.h +++ b/fs/xfs/xfs_log.h @@ -110,6 +110,12 @@ typedef struct xfs_log_iovec { uint i_type; /* type of region */ } xfs_log_iovec_t; +struct xfs_log_vec { + struct xfs_log_vec *lv_next; /* next lv in build list */ + int lv_niovecs; /* number of iovecs in lv */ + struct xfs_log_iovec *lv_iovecp; /* iovec array */ +}; + /* * Structure used to pass callback function and the function's argument * to the log manager. |