diff options
| -rw-r--r-- | fs/nfs/inode.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index d218d164414f..b88e9dc72eec 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -1754,6 +1754,34 @@ static int nfs_inode_attrs_cmp(const struct nfs_fattr *fattr, return 0; } +/** + * nfs_inode_finish_partial_attr_update - complete a previous inode update + * @fattr: attributes + * @inode: pointer to inode + * + * Returns '1' if the last attribute update left the inode cached + * attributes in a partially unrevalidated state, and @fattr + * matches the change attribute of that partial update. + * Otherwise returns '0'. + */ +static int nfs_inode_finish_partial_attr_update(const struct nfs_fattr *fattr, + const struct inode *inode) +{ + const unsigned long check_valid = + NFS_INO_INVALID_ATIME | NFS_INO_INVALID_CTIME | + NFS_INO_INVALID_MTIME | NFS_INO_INVALID_SIZE | + NFS_INO_INVALID_BLOCKS | NFS_INO_INVALID_OTHER | + NFS_INO_INVALID_NLINK; + unsigned long cache_validity = NFS_I(inode)->cache_validity; + + if (!(cache_validity & NFS_INO_INVALID_CHANGE) && + (cache_validity & check_valid) != 0 && + (fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && + nfs_inode_attrs_cmp_monotonic(fattr, inode) == 0) + return 1; + return 0; +} + static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) { @@ -1762,7 +1790,7 @@ static int nfs_refresh_inode_locked(struct inode *inode, trace_nfs_refresh_inode_enter(inode); - if (attr_cmp > 0) + if (attr_cmp > 0 || nfs_inode_finish_partial_attr_update(fattr, inode)) ret = nfs_update_inode(inode, fattr); else if (attr_cmp == 0) ret = nfs_check_inode_attributes(inode, fattr); |