From: Trond Myklebust Date: Wed, 9 May 2007 13:00:17 +0000 (-0400) Subject: NFS: Fix a jiffie wraparound issue X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=e62c2bba1fb7cf068eb78d731da46e4447a9efb1;p=openwrt%2Fstaging%2Fblogic.git NFS: Fix a jiffie wraparound issue dentry verifiers are always set to the parent directory's cache_change_attribute. There is no reason to be testing for anything other than equality when we're trying to find out if the dentry has been checked since the last time the directory was modified. Signed-off-by: Trond Myklebust --- diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 625d8e5fb39d..fced7d1d48de 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -650,12 +650,17 @@ int nfs_fsync_dir(struct file *filp, struct dentry *dentry, int datasync) */ static int nfs_check_verifier(struct inode *dir, struct dentry *dentry) { + unsigned long verf; + if (IS_ROOT(dentry)) return 1; + verf = (unsigned long)dentry->d_fsdata; if ((NFS_I(dir)->cache_validity & NFS_INO_INVALID_ATTR) != 0 - || nfs_attribute_timeout(dir)) + || nfs_attribute_timeout(dir) + || nfs_caches_unstable(dir) + || verf != NFS_I(dir)->cache_change_attribute) return 0; - return nfs_verify_change_attribute(dir, (unsigned long)dentry->d_fsdata); + return 1; } static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf) @@ -665,8 +670,7 @@ static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf) static void nfs_refresh_verifier(struct dentry * dentry, unsigned long verf) { - if (time_after(verf, (unsigned long)dentry->d_fsdata)) - nfs_set_verifier(dentry, verf); + nfs_set_verifier(dentry, verf); } /*