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author | Andreas Gruenbacher <agruenba@redhat.com> | 2018-03-05 06:24:28 -0700 |
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committer | Bob Peterson <rpeterso@redhat.com> | 2018-03-08 09:26:20 -0700 |
commit | d39d18e0ef738cc8614abd8bb25fb270a4c41801 (patch) | |
tree | 3a362c35c8a51fad2841c60e2533e864932c758c /fs/gfs2/bmap.c | |
parent | b9e03f1861d8ee117aebb40e5d975cf355879405 (diff) | |
download | linux-d39d18e0ef738cc8614abd8bb25fb270a4c41801.tar.bz2 |
gfs2: Improve gfs2_block_map comment
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Diffstat (limited to 'fs/gfs2/bmap.c')
-rw-r--r-- | fs/gfs2/bmap.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index 51f940e76c5e..8c25a64d8ae0 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -812,15 +812,22 @@ do_alloc: } /** - * gfs2_block_map - Map a block from an inode to a disk block + * gfs2_block_map - Map one or more blocks of an inode to a disk block * @inode: The inode * @lblock: The logical block number * @bh_map: The bh to be mapped * @create: True if its ok to alloc blocks to satify the request * - * Sets buffer_mapped() if successful, sets buffer_boundary() if a - * read of metadata will be required before the next block can be - * mapped. Sets buffer_new() if new blocks were allocated. + * The size of the requested mapping is defined in bh_map->b_size. + * + * Clears buffer_mapped(bh_map) and leaves bh_map->b_size unchanged + * when @lblock is not mapped. Sets buffer_mapped(bh_map) and + * bh_map->b_size to indicate the size of the mapping when @lblock and + * successive blocks are mapped, up to the requested size. + * + * Sets buffer_boundary() if a read of metadata will be required + * before the next block can be mapped. Sets buffer_new() if new + * blocks were allocated. * * Returns: errno */ |