From: David Howells <dhowells@redhat.com>
To: Christian Brauner <christian@brauner.io>,
Jeff Layton <jlayton@kernel.org>,
Gao Xiang <hsiangkao@linux.alibaba.com>,
Dominique Martinet <asmadeus@codewreck.org>
Cc: David Howells <dhowells@redhat.com>,
Matthew Wilcox <willy@infradead.org>,
Steve French <smfrench@gmail.com>,
Marc Dionne <marc.dionne@auristor.com>,
Paulo Alcantara <pc@manguebit.com>,
Shyam Prasad N <sprasad@microsoft.com>,
Tom Talpey <tom@talpey.com>,
Eric Van Hensbergen <ericvh@kernel.org>,
Ilya Dryomov <idryomov@gmail.com>,
netfs@lists.linux.dev, linux-cachefs@redhat.com,
linux-afs@lists.infradead.org, linux-cifs@vger.kernel.org,
linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org,
v9fs@lists.linux.dev, linux-erofs@lists.ozlabs.org,
linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Steve French <sfrench@samba.org>,
Shyam Prasad N <nspmangalore@gmail.com>,
Rohith Surabattula <rohiths.msft@gmail.com>
Subject: [PATCH v2 01/22] netfs: Update i_blocks when write committed to pagecache
Date: Tue, 30 Apr 2024 15:00:32 +0100 [thread overview]
Message-ID: <20240430140056.261997-2-dhowells@redhat.com> (raw)
In-Reply-To: <20240430140056.261997-1-dhowells@redhat.com>
Update i_blocks when i_size is updated when we finish making a write to the
pagecache to reflect the amount of space we think will be consumed.
This maintains cifs commit dbfdff402d89854126658376cbcb08363194d3cd ("smb3:
update allocation size more accurately on write completion") which would
otherwise be removed by the cifs part of the netfs writeback rewrite.
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
cc: Steve French <sfrench@samba.org>
cc: Shyam Prasad N <nspmangalore@gmail.com>
cc: Rohith Surabattula <rohiths.msft@gmail.com>
cc: linux-cifs@vger.kernel.org
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
---
fs/netfs/buffered_write.c | 45 +++++++++++++++++++++++++++++----------
1 file changed, 34 insertions(+), 11 deletions(-)
diff --git a/fs/netfs/buffered_write.c b/fs/netfs/buffered_write.c
index 267b622d923b..f7455a579f21 100644
--- a/fs/netfs/buffered_write.c
+++ b/fs/netfs/buffered_write.c
@@ -130,6 +130,37 @@ static struct folio *netfs_grab_folio_for_write(struct address_space *mapping,
mapping_gfp_mask(mapping));
}
+/*
+ * Update i_size and estimate the update to i_blocks to reflect the additional
+ * data written into the pagecache until we can find out from the server what
+ * the values actually are.
+ */
+static void netfs_update_i_size(struct netfs_inode *ctx, struct inode *inode,
+ loff_t i_size, loff_t pos, size_t copied)
+{
+ blkcnt_t add;
+ size_t gap;
+
+ if (ctx->ops->update_i_size) {
+ ctx->ops->update_i_size(inode, pos);
+ return;
+ }
+
+ i_size_write(inode, pos);
+#if IS_ENABLED(CONFIG_FSCACHE)
+ fscache_update_cookie(ctx->cache, NULL, &pos);
+#endif
+
+ gap = SECTOR_SIZE - (i_size & (SECTOR_SIZE - 1));
+ if (copied > gap) {
+ add = DIV_ROUND_UP(copied - gap, SECTOR_SIZE);
+
+ inode->i_blocks = min_t(blkcnt_t,
+ DIV_ROUND_UP(pos, SECTOR_SIZE),
+ inode->i_blocks + add);
+ }
+}
+
/**
* netfs_perform_write - Copy data into the pagecache.
* @iocb: The operation parameters
@@ -351,18 +382,10 @@ ssize_t netfs_perform_write(struct kiocb *iocb, struct iov_iter *iter,
trace_netfs_folio(folio, trace);
/* Update the inode size if we moved the EOF marker */
- i_size = i_size_read(inode);
pos += copied;
- if (pos > i_size) {
- if (ctx->ops->update_i_size) {
- ctx->ops->update_i_size(inode, pos);
- } else {
- i_size_write(inode, pos);
-#if IS_ENABLED(CONFIG_FSCACHE)
- fscache_update_cookie(ctx->cache, NULL, &pos);
-#endif
- }
- }
+ i_size = i_size_read(inode);
+ if (pos > i_size)
+ netfs_update_i_size(ctx, inode, i_size, pos, copied);
written += copied;
if (likely(!wreq)) {
next prev parent reply other threads:[~2024-04-30 14:01 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-30 14:00 [PATCH v2 00/22] netfs, afs, 9p, cifs: Rework netfs to use ->writepages() to copy to cache David Howells
2024-04-30 14:00 ` David Howells [this message]
2024-04-30 14:00 ` [PATCH v2 02/22] netfs: Replace PG_fscache by setting folio->private and marking dirty David Howells
2024-04-30 14:00 ` [PATCH v2 03/22] mm: Remove the PG_fscache alias for PG_private_2 David Howells
2024-04-30 14:00 ` [PATCH v2 04/22] netfs: Remove deprecated use of PG_private_2 as a second writeback flag David Howells
2024-04-30 14:00 ` [PATCH v2 05/22] netfs: Make netfs_io_request::subreq_counter an atomic_t David Howells
2024-04-30 14:00 ` [PATCH v2 06/22] netfs: Use subreq_counter to allocate subreq debug_index values David Howells
2024-04-30 14:00 ` [PATCH v2 07/22] mm: Provide a means of invalidation without using launder_folio David Howells
2024-05-01 4:41 ` Christoph Hellwig
2024-04-30 14:00 ` [PATCH v2 08/22] 9p: Use alternative invalidation to " David Howells
2024-04-30 14:00 ` [PATCH v2 09/22] afs: " David Howells
2024-04-30 14:00 ` [PATCH v2 10/22] netfs: Remove ->launder_folio() support David Howells
2024-04-30 14:00 ` [PATCH v2 11/22] netfs: Use mempools for allocating requests and subrequests David Howells
2024-04-30 14:00 ` [PATCH v2 12/22] mm: Export writeback_iter() David Howells
2024-04-30 14:00 ` [PATCH v2 13/22] netfs: Switch to using unsigned long long rather than loff_t David Howells
2024-04-30 14:00 ` [PATCH v2 14/22] netfs: New writeback implementation David Howells
2024-04-30 14:00 ` [PATCH v2 15/22] netfs: Add some write-side stats and clean up some stat names David Howells
2024-04-30 14:00 ` [PATCH v2 16/22] netfs, afs: Implement helpers for new write code David Howells
2024-04-30 14:00 ` [PATCH v2 17/22] netfs, 9p: " David Howells
2024-04-30 14:00 ` [PATCH v2 18/22] netfs, cachefiles: " David Howells
2024-04-30 14:00 ` [PATCH v2 19/22] netfs: Cut over to using new writeback code David Howells
2024-04-30 14:00 ` [PATCH v2 20/22] netfs: Remove the old " David Howells
2024-04-30 14:00 ` [PATCH v2 21/22] netfs: Miscellaneous tidy ups David Howells
2024-04-30 14:00 ` [PATCH v2 22/22] netfs, afs: Use writeback retry to deal with alternate keys David Howells
2024-05-01 11:51 ` [PATCH v2 07/22] mm: Provide a means of invalidation without using launder_folio David Howells
2024-05-01 17:00 ` [PATCH v2 14/22] netfs: New writeback implementation David Howells
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