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authorDavid Howells <dhowells@redhat.com>2020-10-22 15:40:31 +0200
committerDavid Howells <dhowells@redhat.com>2020-10-27 23:05:56 +0100
commitd383e346f97d6bb0d654bb3d63c44ab106d92d29 (patch)
tree95f45265515b57b620fa4608d933caa1e200dc97 /fs/afs/write.c
parentafs: Fix a use after free in afs_xattr_get_acl() (diff)
downloadlinux-d383e346f97d6bb0d654bb3d63c44ab106d92d29.tar.xz
linux-d383e346f97d6bb0d654bb3d63c44ab106d92d29.zip
afs: Fix afs_launder_page to not clear PG_writeback
Fix afs_launder_page() to not clear PG_writeback on the page it is laundering as the flag isn't set in this case. Fixes: 4343d00872e1 ("afs: Get rid of the afs_writeback record") Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'fs/afs/write.c')
-rw-r--r--fs/afs/write.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/fs/afs/write.c b/fs/afs/write.c
index da12abd6db21..b937ec047ec9 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -396,7 +396,8 @@ static void afs_store_data_success(struct afs_operation *op)
op->ctime = op->file[0].scb.status.mtime_client;
afs_vnode_commit_status(op, &op->file[0]);
if (op->error == 0) {
- afs_pages_written_back(vnode, op->store.first, op->store.last);
+ if (!op->store.laundering)
+ afs_pages_written_back(vnode, op->store.first, op->store.last);
afs_stat_v(vnode, n_stores);
atomic_long_add((op->store.last * PAGE_SIZE + op->store.last_to) -
(op->store.first * PAGE_SIZE + op->store.first_offset),
@@ -415,7 +416,7 @@ static const struct afs_operation_ops afs_store_data_operation = {
*/
static int afs_store_data(struct address_space *mapping,
pgoff_t first, pgoff_t last,
- unsigned offset, unsigned to)
+ unsigned offset, unsigned to, bool laundering)
{
struct afs_vnode *vnode = AFS_FS_I(mapping->host);
struct afs_operation *op;
@@ -448,6 +449,7 @@ static int afs_store_data(struct address_space *mapping,
op->store.last = last;
op->store.first_offset = offset;
op->store.last_to = to;
+ op->store.laundering = laundering;
op->mtime = vnode->vfs_inode.i_mtime;
op->flags |= AFS_OPERATION_UNINTR;
op->ops = &afs_store_data_operation;
@@ -601,7 +603,7 @@ no_more:
if (end > i_size)
to = i_size & ~PAGE_MASK;
- ret = afs_store_data(mapping, first, last, offset, to);
+ ret = afs_store_data(mapping, first, last, offset, to, false);
switch (ret) {
case 0:
ret = count;
@@ -921,7 +923,7 @@ int afs_launder_page(struct page *page)
trace_afs_page_dirty(vnode, tracepoint_string("launder"),
page->index, priv);
- ret = afs_store_data(mapping, page->index, page->index, t, f);
+ ret = afs_store_data(mapping, page->index, page->index, t, f, true);
}
trace_afs_page_dirty(vnode, tracepoint_string("laundered"),