[PATCH v17 07/17] afs: Fix an inconsistency in the symlink code

[David Howells <dhowells@redhat.com>]

Fix the afs symlink code to set ->directory_size to the size of the buffer,
not PAGE_SIZE-1 or i_size.  This doesn't actually change the operation
since the value is ignored by the symlink writeback path (which writes to
the cache).

This was spotted by Claude.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Paulo Alcantara <pc@manguebit.org>
cc: Matthew Wilcox <willy@infradead.org>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Christoph Hellwig <hch@infradead.org>
cc: linux-afs@lists.infradead.org
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
---
 fs/afs/symlink.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/afs/symlink.c b/fs/afs/symlink.c
index 6b8c122877ca..a1dbd552ddff 100644
--- a/fs/afs/symlink.c
+++ b/fs/afs/symlink.c
@@ -99,7 +99,7 @@ static ssize_t afs_do_read_symlink(struct afs_vnode *vnode)
 		ret = netfs_alloc_folioq_buffer(NULL,
 						&vnode->directory, &cur_size, PAGE_SIZE,
 						mapping_gfp_mask(vnode->netfs.inode.i_mapping));
-		vnode->directory_size = PAGE_SIZE - 1;
+		vnode->directory_size = PAGE_SIZE;
 		if (ret < 0)
 			return ret;
 	}
@@ -116,7 +116,6 @@ static ssize_t afs_do_read_symlink(struct afs_vnode *vnode)
 			trace_afs_file_error(vnode, -EFBIG, afs_file_error_dir_big);
 			return -EFBIG;
 		}
-		vnode->directory_size = i_size;
 
 		/* Copy the symlink. */
 		symlink = kmalloc_flex(struct afs_symlink, content, i_size + 1);