| Subject | [PATCH 53/67] afs: Invoke fscache_resize_cookie() when handling ATTR_SIZE for setattr | From | David Howells <> | Date | Mon, 18 Oct 2021 16:04:08 +0100 |
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Invoke fscache_resize_cookie() to adjust the size of the backing cache object when setattr is called with ATTR_SIZE. This discards any data that then lies beyond the revised EOF and frees up space.
Signed-off-by: David Howells <dhowells@redhat.com> cc: Marc Dionne <marc.dionne@auristor.com> cc: linux-afs@lists.infradead.org ---
fs/afs/inode.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/fs/afs/inode.c b/fs/afs/inode.c index 311df66c64d0..c4af4fda37dd 100644 --- a/fs/afs/inode.c +++ b/fs/afs/inode.c @@ -829,6 +829,9 @@ static void afs_setattr_edit_file(struct afs_operation *op) if (size < i_size) truncate_pagecache(inode, size); + if (size != i_size) + fscache_resize_cookie(afs_vnode_cache(vp->vnode), + vp->scb.status.size); } } @@ -872,6 +875,8 @@ int afs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, attr->ia_valid &= ~ATTR_SIZE; } + fscache_use_cookie(afs_vnode_cache(vnode), true); + /* flush any dirty data outstanding on a regular file */ if (S_ISREG(vnode->vfs_inode.i_mode)) filemap_write_and_wait(vnode->vfs_inode.i_mapping); @@ -903,6 +908,7 @@ int afs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, out_unlock: up_write(&vnode->validate_lock); + fscache_unuse_cookie(afs_vnode_cache(vnode), NULL, NULL); _leave(" = %d", ret); return ret; }
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