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authorTrond Myklebust <Trond.Myklebust@netapp.com>2007-09-27 15:57:24 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2007-10-09 17:18:57 -0400
commit47aabaa7e45385fee4a535a6f6e523ff944e1684 (patch)
tree7f780c414b5037b45cc1eb3fee64e083913fb45c /fs/nfs
parent17cadc95372e28024be0874e67329c1862912c5d (diff)
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NFSv4: Don't use ctime/mtime for determining when to invalidate the caches
In NFSv4 we should only be looking at the change attribute. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/inode.c47
1 files changed, 24 insertions, 23 deletions
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 7e73edc..cd57f79 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -976,6 +976,27 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
/* Do atomic weak cache consistency updates */
nfs_wcc_update_inode(inode, fattr);
+ /* More cache consistency checks */
+ if (!(fattr->valid & NFS_ATTR_FATTR_V4)) {
+ /* NFSv2/v3: Check if the mtime agrees */
+ if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
+ dprintk("NFS: mtime change on server for file %s/%ld\n",
+ inode->i_sb->s_id, inode->i_ino);
+ invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
+ nfsi->cache_change_attribute = now;
+ }
+ /* If ctime has changed we should definitely clear access+acl caches */
+ if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
+ invalid |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
+ nfsi->cache_change_attribute = now;
+ }
+ } else if (nfsi->change_attr != fattr->change_attr) {
+ dprintk("NFS: change_attr change on server for file %s/%ld\n",
+ inode->i_sb->s_id, inode->i_ino);
+ invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
+ nfsi->cache_change_attribute = now;
+ }
+
/* Check if our cached file size is stale */
new_isize = nfs_size_to_loff_t(fattr->size);
cur_isize = i_size_read(inode);
@@ -997,22 +1018,11 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
inode->i_sb->s_id, inode->i_ino);
}
- /* Check if the mtime agrees */
- if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
- memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
- dprintk("NFS: mtime change on server for file %s/%ld\n",
- inode->i_sb->s_id, inode->i_ino);
- invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
- nfsi->cache_change_attribute = now;
- }
- /* If ctime has changed we should definitely clear access+acl caches */
- if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
- invalid |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
- memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
- nfsi->cache_change_attribute = now;
- }
+ memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
+ memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
+ nfsi->change_attr = fattr->change_attr;
if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) ||
inode->i_uid != fattr->uid ||
@@ -1033,15 +1043,6 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
inode->i_blocks = fattr->du.nfs2.blocks;
}
- if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 &&
- nfsi->change_attr != fattr->change_attr) {
- dprintk("NFS: change_attr change on server for file %s/%ld\n",
- inode->i_sb->s_id, inode->i_ino);
- nfsi->change_attr = fattr->change_attr;
- invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
- nfsi->cache_change_attribute = now;
- }
-
/* Update attrtimeo value if we're out of the unstable period */
if (invalid & NFS_INO_INVALID_ATTR) {
nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);