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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>
This commit is contained in:
Trond Myklebust 2007-09-27 15:57:24 -04:00
Родитель 17cadc9537
Коммит 47aabaa7e4
1 изменённых файлов: 24 добавлений и 23 удалений
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47
fs/nfs/inode.c
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@ -976,6 +976,27 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
/* Do atomic weak cache consistency updates */ /* Do atomic weak cache consistency updates */
nfs_wcc_update_inode(inode, fattr); 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 */ /* Check if our cached file size is stale */
new_isize = nfs_size_to_loff_t(fattr->size); new_isize = nfs_size_to_loff_t(fattr->size);
cur_isize = i_size_read(inode); 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); 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 */ memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_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_atime, &fattr->atime, sizeof(inode->i_atime)); 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) || if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) ||
inode->i_uid != fattr->uid || 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; 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 */ /* Update attrtimeo value if we're out of the unstable period */
if (invalid & NFS_INO_INVALID_ATTR) { if (invalid & NFS_INO_INVALID_ATTR) {
nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);