From 0b467264d0db011cd48f5adf24dd40543bceaccd Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sun, 3 Jun 2018 11:56:05 -0400 Subject: [PATCH] NFS: Fix attribute revalidation Don't mark attributes as invalid just because they have changed. Instead, for the purposes of adjusting the attribute cache timeout, keep a separate variable that tracks whether or not a change occurred. Signed-off-by: Trond Myklebust --- fs/nfs/inode.c | 34 +++++++++++++++------------------- 1 file changed, 15 insertions(+), 19 deletions(-) diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 2b7edd011d86..f35c5eb09cc9 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -1788,6 +1788,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) unsigned long save_cache_validity; bool have_writers = nfs_file_has_buffered_writers(nfsi); bool cache_revalidated = true; + bool attr_changed = false; dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n", __func__, inode->i_sb->s_id, inode->i_ino, @@ -1848,8 +1849,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) inode->i_sb->s_id, inode->i_ino); /* Could it be a race with writeback? */ if (!have_writers) { - invalid |= NFS_INO_INVALID_CHANGE - | NFS_INO_INVALID_DATA + invalid |= NFS_INO_INVALID_DATA | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; /* Force revalidate of all attributes */ @@ -1861,6 +1861,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) nfs_force_lookup_revalidate(inode); } inode_set_iversion_raw(inode, fattr->change_attr); + attr_changed = true; } } else { nfsi->cache_validity |= save_cache_validity & @@ -1899,6 +1900,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) i_size_write(inode, new_isize); if (!have_writers) invalid |= NFS_INO_INVALID_DATA; + attr_changed = true; } dprintk("NFS: isize change on server for file %s/%ld " "(%Ld to %Ld)\n", @@ -1931,14 +1933,12 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) newmode |= fattr->mode & S_IALLUGO; inode->i_mode = newmode; invalid |= NFS_INO_INVALID_ACCESS - | NFS_INO_INVALID_ACL - | NFS_INO_INVALID_OTHER; + | NFS_INO_INVALID_ACL; + attr_changed = true; } } else if (server->caps & NFS_CAP_MODE) { nfsi->cache_validity |= save_cache_validity & - (NFS_INO_INVALID_ACCESS - | NFS_INO_INVALID_ACL - | NFS_INO_INVALID_OTHER + (NFS_INO_INVALID_OTHER | NFS_INO_REVAL_FORCED); cache_revalidated = false; } @@ -1946,15 +1946,13 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) if (fattr->valid & NFS_ATTR_FATTR_OWNER) { if (!uid_eq(inode->i_uid, fattr->uid)) { invalid |= NFS_INO_INVALID_ACCESS - | NFS_INO_INVALID_ACL - | NFS_INO_INVALID_OTHER; + | NFS_INO_INVALID_ACL; inode->i_uid = fattr->uid; + attr_changed = true; } } else if (server->caps & NFS_CAP_OWNER) { nfsi->cache_validity |= save_cache_validity & - (NFS_INO_INVALID_ACCESS - | NFS_INO_INVALID_ACL - | NFS_INO_INVALID_OTHER + (NFS_INO_INVALID_OTHER | NFS_INO_REVAL_FORCED); cache_revalidated = false; } @@ -1962,25 +1960,23 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) if (fattr->valid & NFS_ATTR_FATTR_GROUP) { if (!gid_eq(inode->i_gid, fattr->gid)) { invalid |= NFS_INO_INVALID_ACCESS - | NFS_INO_INVALID_ACL - | NFS_INO_INVALID_OTHER; + | NFS_INO_INVALID_ACL; inode->i_gid = fattr->gid; + attr_changed = true; } } else if (server->caps & NFS_CAP_OWNER_GROUP) { nfsi->cache_validity |= save_cache_validity & - (NFS_INO_INVALID_ACCESS - | NFS_INO_INVALID_ACL - | NFS_INO_INVALID_OTHER + (NFS_INO_INVALID_OTHER | NFS_INO_REVAL_FORCED); cache_revalidated = false; } if (fattr->valid & NFS_ATTR_FATTR_NLINK) { if (inode->i_nlink != fattr->nlink) { - invalid |= NFS_INO_INVALID_OTHER; if (S_ISDIR(inode->i_mode)) invalid |= NFS_INO_INVALID_DATA; set_nlink(inode, fattr->nlink); + attr_changed = true; } } else if (server->caps & NFS_CAP_NLINK) { nfsi->cache_validity |= save_cache_validity & @@ -2000,7 +1996,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) cache_revalidated = false; /* Update attrtimeo value if we're out of the unstable period */ - if (invalid & NFS_INO_INVALID_ATTR) { + if (attr_changed) { invalid &= ~NFS_INO_INVALID_ATTR; nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); -- 2.30.2