From: David Howells <dhowells@redhat.com>
To: linux-afs@lists.infradead.org
Cc: dhowells@redhat.com, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 04/10] afs: Fix afs_launder_page to not clear PG_writeback
Date: Tue, 27 Oct 2020 13:50:27 +0000 [thread overview]
Message-ID: <160380662715.3467511.74460863169151977.stgit@warthog.procyon.org.uk> (raw)
In-Reply-To: <160380659566.3467511.15495463187114465303.stgit@warthog.procyon.org.uk>
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>
---
fs/afs/internal.h | 1 +
fs/afs/write.c | 10 ++++++----
2 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 81b0485fd22a..289f5dffa46f 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -812,6 +812,7 @@ struct afs_operation {
pgoff_t last; /* last page in mapping to deal with */
unsigned first_offset; /* offset into mapping[first] */
unsigned last_to; /* amount of mapping[last] */
+ bool laundering; /* Laundering page, PG_writeback not set */
} store;
struct {
struct iattr *attr;
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 @@ static int afs_write_back_from_locked_page(struct address_space *mapping,
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"),
next prev parent reply other threads:[~2020-10-27 13:50 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-27 13:49 [PATCH 00/10] AFS fixes David Howells
2020-10-27 13:50 ` [PATCH 01/10] afs: Fix copy_file_range() David Howells
2020-10-27 16:02 ` Christoph Hellwig
2020-10-27 13:50 ` [PATCH 02/10] afs: Fix tracing deref-before-check David Howells
2020-10-27 13:50 ` [PATCH 03/10] afs: Fix a use after free in afs_xattr_get_acl() David Howells
2020-10-27 13:50 ` David Howells [this message]
2020-10-27 13:50 ` [PATCH 05/10] afs: Fix to take ref on page when PG_private is set David Howells
2020-10-27 13:50 ` [PATCH 06/10] afs: Fix page leak on afs_write_begin() failure David Howells
2020-10-27 13:50 ` [PATCH 07/10] afs: Fix where page->private is set during write David Howells
2020-10-27 13:50 ` [PATCH 08/10] afs: Wrap page->private manipulations in inline functions David Howells
2020-10-27 18:45 ` kernel test robot
2020-10-27 13:51 ` [PATCH 09/10] afs: Alter dirty range encoding in page->private David Howells
2020-10-27 13:51 ` [PATCH 10/10] afs: Fix afs_invalidatepage to adjust the dirty region David Howells
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