This is a note to let you know that I've just added the patch titled
NFS: Don't declare inode uptodate unless all attributes were checked
to the 3.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nfs-don-t-declare-inode-uptodate-unless-all-attributes-were-checked.patch
and it can be found in the queue-3.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 43b6535e717d2f656f71d9bd16022136b781c934 Mon Sep 17 00:00:00 2001
From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
Date: Tue, 15 Apr 2014 10:07:57 -0400
Subject: NFS: Don't declare inode uptodate unless all attributes were checked
From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
commit 43b6535e717d2f656f71d9bd16022136b781c934 upstream.
Fix a bug, whereby nfs_update_inode() was declaring the inode to be
up to date despite not having checked all the attributes.
The bug occurs because the temporary variable in which we cache
the validity information is 'sanitised' before reapplying to
nfsi->cache_validity.
Reported-by: Kinglong Mee <kinglongmee@xxxxxxxxx>
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/nfs/inode.c | 26 +++++++++++++++++---------
1 file changed, 17 insertions(+), 9 deletions(-)
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1575,18 +1575,20 @@ static int nfs_update_inode(struct inode
inode->i_version = fattr->change_attr;
}
} else if (server->caps & NFS_CAP_CHANGE_ATTR)
- invalid |= save_cache_validity;
+ nfsi->cache_validity |= save_cache_validity;
if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
} else if (server->caps & NFS_CAP_MTIME)
- invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
+ nfsi->cache_validity |= save_cache_validity &
+ (NFS_INO_INVALID_ATTR
| NFS_INO_REVAL_FORCED);
if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
} else if (server->caps & NFS_CAP_CTIME)
- invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
+ nfsi->cache_validity |= save_cache_validity &
+ (NFS_INO_INVALID_ATTR
| NFS_INO_REVAL_FORCED);
/* Check if our cached file size is stale */
@@ -1608,7 +1610,8 @@ static int nfs_update_inode(struct inode
(long long)new_isize);
}
} else
- invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
+ nfsi->cache_validity |= save_cache_validity &
+ (NFS_INO_INVALID_ATTR
| NFS_INO_REVAL_PAGECACHE
| NFS_INO_REVAL_FORCED);
@@ -1616,7 +1619,8 @@ static int nfs_update_inode(struct inode
if (fattr->valid & NFS_ATTR_FATTR_ATIME)
memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
else if (server->caps & NFS_CAP_ATIME)
- invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME
+ nfsi->cache_validity |= save_cache_validity &
+ (NFS_INO_INVALID_ATIME
| NFS_INO_REVAL_FORCED);
if (fattr->valid & NFS_ATTR_FATTR_MODE) {
@@ -1627,7 +1631,8 @@ static int nfs_update_inode(struct inode
invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
}
} else if (server->caps & NFS_CAP_MODE)
- invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
+ nfsi->cache_validity |= save_cache_validity &
+ (NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
| NFS_INO_REVAL_FORCED);
@@ -1638,7 +1643,8 @@ static int nfs_update_inode(struct inode
inode->i_uid = fattr->uid;
}
} else if (server->caps & NFS_CAP_OWNER)
- invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
+ nfsi->cache_validity |= save_cache_validity &
+ (NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
| NFS_INO_REVAL_FORCED);
@@ -1649,7 +1655,8 @@ static int nfs_update_inode(struct inode
inode->i_gid = fattr->gid;
}
} else if (server->caps & NFS_CAP_OWNER_GROUP)
- invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
+ nfsi->cache_validity |= save_cache_validity &
+ (NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
| NFS_INO_REVAL_FORCED);
@@ -1662,7 +1669,8 @@ static int nfs_update_inode(struct inode
set_nlink(inode, fattr->nlink);
}
} else if (server->caps & NFS_CAP_NLINK)
- invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
+ nfsi->cache_validity |= save_cache_validity &
+ (NFS_INO_INVALID_ATTR
| NFS_INO_REVAL_FORCED);
if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
Patches currently in stable-queue which might be from trond.myklebust@xxxxxxxxxxxxxxx are
queue-3.15/nfs-fix-cache_validity-check-in-nfs_write_pageuptodate.patch
queue-3.15/nfs-populate-net-in-mount-data-when-remounting.patch
queue-3.15/pnfs-handle-allocation-errors-correctly-in-filelayout_alloc_layout_hdr.patch
queue-3.15/nfs-use-raw_write_seqcount_begin-end-int-nfs4_reclaim_open_state.patch
queue-3.15/sunrpc-fix-a-module-reference-leak-in-svc_handle_xprt.patch
queue-3.15/nfs-don-t-declare-inode-uptodate-unless-all-attributes-were-checked.patch
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