Messages in this thread Patch in this message | | | From | Nigel Cunningham <> | Subject | [Suspend2][ 06/35] [Suspend2] Filewriter populate block list. | Date | Tue, 27 Jun 2006 08:39:23 +1000 |
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Populate the extent chain that contains the list of sectors we'll use for writing the image.
Signed-off-by: Nigel Cunningham <nigel@suspend2.net>
kernel/power/suspend_file.c | 67 +++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 67 insertions(+), 0 deletions(-)
diff --git a/kernel/power/suspend_file.c b/kernel/power/suspend_file.c index 9046b80..97f97be 100644 --- a/kernel/power/suspend_file.c +++ b/kernel/power/suspend_file.c @@ -168,3 +168,70 @@ static int size_ignoring_ignored_pages(v return filewriter_storage_available(); } +static void __populate_block_list(int min, int max) +{ + if (test_action_state(SUSPEND_TEST_BIO)) + printk("Adding extent %d-%d.\n", min << devinfo.bmap_shift, + ((max + 1) << devinfo.bmap_shift) - 1); + + suspend_add_to_extent_chain(&block_chain, min, max); +} + +static void populate_block_list(void) +{ + int i; + + if (block_chain.first) + suspend_put_extent_chain(&block_chain); + + if (target_is_normal_file()) { + int extent_min = -1, extent_max = -1, got_header = 0; + + for (i = 0; + i < (target_inode->i_size >> PAGE_SHIFT); + i++) { + sector_t new_sector; + + if (!has_contiguous_blocks(i)) + continue; + + new_sector = bmap(target_inode, + (i * devinfo.blocks_per_page)); + + /* + * Ignore the first block in the file. + * It gets the header. + */ + if (new_sector == target_firstblock >> devinfo.bmap_shift) { + got_header = 1; + continue; + } + + /* + * I'd love to be able to fill in holes and resize + * files, but not yet... + */ + + if (new_sector == extent_max + 1) + extent_max+= devinfo.blocks_per_page; + else { + if (extent_min > -1) + __populate_block_list(extent_min, + extent_max); + + extent_min = new_sector; + extent_max = extent_min + + devinfo.blocks_per_page - 1; + } + } + if (extent_min > -1) + __populate_block_list(extent_min, extent_max); + + BUG_ON(!got_header); + } else + if (target_storage_available > 0) + __populate_block_list(devinfo.blocks_per_page, + (min(main_pages, target_storage_available) + 1) * + devinfo.blocks_per_page - 1); +} + -- Nigel Cunningham nigel at suspend2 dot net - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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