Commit 4058f742 authored Nov 05, 2021 by David Howells

netfs: Keep track of the actual remote file size

Provide a place in which to keep track of the actual remote file size in
the netfs context. This is needed because inode->i_size will be updated as
we buffer writes in the pagecache, but the server file size won't get
updated until we flush them back.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
cc: linux-cachefs@redhat.com

Link: https://lore.kernel.org/r/164623013727.3564931.17659955636985232717.stgit@warthog.procyon.org.uk/ # v1
Link: https://lore.kernel.org/r/164678219305.1200972.6459431995188365134.stgit@warthog.procyon.org.uk/ # v2
Link: https://lore.kernel.org/r/164692921865.2099075.5310757978508056134.stgit@warthog.procyon.org.uk/ # v3

parent b900f4b8

include/linux/netfs.h

+16 −0

Original line number	Diff line number	Diff line
		@@ -126,6 +126,7 @@ struct netfs_i_context {
		#if IS_ENABLED(CONFIG_FSCACHE)
		struct fscache_cookie *cache;
		#endif
		loff_t remote_i_size; /* Size of the remote file */
		};

		/*
		@@ -324,6 +325,21 @@ static inline void netfs_i_context_init(struct inode *inode,

		memset(ctx, 0, sizeof(*ctx));
		ctx->ops = ops;
		ctx->remote_i_size = i_size_read(inode);
		}

		/**
		* netfs_resize_file - Note that a file got resized
		* @inode: The inode being resized
		* @new_i_size: The new file size
		*
		* Inform the netfs lib that a file got resized so that it can adjust its state.
		*/
		static inline void netfs_resize_file(struct inode *inode, loff_t new_i_size)
		{
		struct netfs_i_context *ctx = netfs_i_context(inode);

		ctx->remote_i_size = new_i_size;
		}

		/**