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authorPeng Tao <bergwolf@gmail.com>2012-01-12 23:18:40 +0800
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-01-12 16:52:09 -0500
commit60c52e3a72fda10e82f38b6f979956eb2dcb3d4e (patch)
tree61196d0f4619eb56c5d2b50fb72d292ff6bb5521 /fs/nfs/blocklayout/extents.c
parent74a6eeb44ca6174d9cc93b9b8b4d58211c57bc80 (diff)
pnfsblock: cleanup bl_mark_sectors_init
It does not need to manipulate on partial initialized blocks. Writeback code takes care of it. Signed-off-by: Peng Tao <peng_tao@emc.com> Signed-off-by: Benny Halevy <bhalevy@tonian.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/blocklayout/extents.c')
-rw-r--r--fs/nfs/blocklayout/extents.c76
1 files changed, 5 insertions, 71 deletions
diff --git a/fs/nfs/blocklayout/extents.c b/fs/nfs/blocklayout/extents.c
index 369ef53e89e..d0f52ed2242 100644
--- a/fs/nfs/blocklayout/extents.c
+++ b/fs/nfs/blocklayout/extents.c
@@ -174,33 +174,6 @@ static int _preload_range(struct pnfs_inval_markings *marks,
return status;
}
-static void set_needs_init(sector_t *array, sector_t offset)
-{
- sector_t *p = array;
-
- dprintk("%s enter\n", __func__);
- if (!p)
- return;
- while (*p < offset)
- p++;
- if (*p == offset)
- return;
- else if (*p == ~0) {
- *p++ = offset;
- *p = ~0;
- return;
- } else {
- sector_t *save = p;
- dprintk("%s Adding %llu\n", __func__, (u64)offset);
- while (*p != ~0)
- p++;
- p++;
- memmove(save + 1, save, (char *)p - (char *)save);
- *save = offset;
- return;
- }
-}
-
/* We are relying on page lock to serialize this */
int bl_is_sector_init(struct pnfs_inval_markings *marks, sector_t isect)
{
@@ -256,28 +229,15 @@ static int is_range_written(struct pnfs_inval_markings *marks,
/* Marks sectors in [offest, offset_length) as having been initialized.
* All lengths are step-aligned, where step is min(pagesize, blocksize).
- * Notes where partial block is initialized, and helps prepare it for
- * complete initialization later.
+ * Currently assumes offset is page-aligned
*/
-/* Currently assumes offset is page-aligned */
int bl_mark_sectors_init(struct pnfs_inval_markings *marks,
- sector_t offset, sector_t length,
- sector_t **pages)
+ sector_t offset, sector_t length)
{
- sector_t s, start, end;
- sector_t *array = NULL; /* Pages to mark */
+ sector_t start, end;
dprintk("%s(offset=%llu,len=%llu) enter\n",
__func__, (u64)offset, (u64)length);
- s = max((sector_t) 3,
- 2 * (marks->im_block_size / (PAGE_CACHE_SECTORS)));
- dprintk("%s set max=%llu\n", __func__, (u64)s);
- if (pages) {
- array = kmalloc(s * sizeof(sector_t), GFP_NOFS);
- if (!array)
- goto outerr;
- array[0] = ~0;
- }
start = normalize(offset, marks->im_block_size);
end = normalize_up(offset + length, marks->im_block_size);
@@ -285,41 +245,15 @@ int bl_mark_sectors_init(struct pnfs_inval_markings *marks,
goto outerr;
spin_lock(&marks->im_lock);
-
- for (s = normalize_up(start, PAGE_CACHE_SECTORS);
- s < offset; s += PAGE_CACHE_SECTORS) {
- dprintk("%s pre-area pages\n", __func__);
- /* Portion of used block is not initialized */
- if (!_has_tag(&marks->im_tree, s, EXTENT_INITIALIZED))
- set_needs_init(array, s);
- }
if (_set_range(&marks->im_tree, EXTENT_INITIALIZED, offset, length))
goto out_unlock;
- for (s = normalize_up(offset + length, PAGE_CACHE_SECTORS);
- s < end; s += PAGE_CACHE_SECTORS) {
- dprintk("%s post-area pages\n", __func__);
- if (!_has_tag(&marks->im_tree, s, EXTENT_INITIALIZED))
- set_needs_init(array, s);
- }
-
spin_unlock(&marks->im_lock);
- if (pages) {
- if (array[0] == ~0) {
- kfree(array);
- *pages = NULL;
- } else
- *pages = array;
- }
return 0;
- out_unlock:
+out_unlock:
spin_unlock(&marks->im_lock);
- outerr:
- if (pages) {
- kfree(array);
- *pages = NULL;
- }
+outerr:
return -ENOMEM;
}