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NFS: Replace use of NFS_INO_REVAL_PAGECACHE when checking cache validity

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When checking cache validity, be more specific than just 'we want to
check the page cache validity'. In almost all cases, we want to check
that change attribute, and possibly also the size.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust
2021-03-25 21:07:21 -04:00
parent 1f3208b2d6
commit 13c0b082b6
4 changed files with 16 additions and 34 deletions
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41
fs/nfs/inode.c
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@@ -164,34 +164,19 @@ static int nfs_attribute_timeout(struct inode *inode)
return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
}
static bool nfs_check_cache_invalid_delegated(struct inode *inode, unsigned long flags)
static bool nfs_check_cache_flags_invalid(struct inode *inode,
unsigned long flags)
{
unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
/* Special case for the pagecache or access cache */
if (flags == NFS_INO_REVAL_PAGECACHE &&
!(cache_validity & NFS_INO_REVAL_FORCED))
return false;
return (cache_validity & flags) != 0;
}
static bool nfs_check_cache_invalid_not_delegated(struct inode *inode, unsigned long flags)
{
unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
if ((cache_validity & flags) != 0)
return true;
if (nfs_attribute_timeout(inode))
return true;
return false;
}
bool nfs_check_cache_invalid(struct inode *inode, unsigned long flags)
{
if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
return nfs_check_cache_invalid_delegated(inode, flags);
return nfs_check_cache_invalid_not_delegated(inode, flags);
if (nfs_check_cache_flags_invalid(inode, flags))
return true;
return nfs_attribute_cache_expired(inode);
}
EXPORT_SYMBOL_GPL(nfs_check_cache_invalid);
@@ -809,14 +794,12 @@ static u32 nfs_get_valid_attrmask(struct inode *inode)
if (!(cache_validity & NFS_INO_INVALID_ATIME))
reply_mask |= STATX_ATIME;
if (!(cache_validity & NFS_INO_REVAL_PAGECACHE)) {
if (!(cache_validity & NFS_INO_INVALID_CTIME))
reply_mask |= STATX_CTIME;
if (!(cache_validity & NFS_INO_INVALID_MTIME))
reply_mask |= STATX_MTIME;
if (!(cache_validity & NFS_INO_INVALID_SIZE))
reply_mask |= STATX_SIZE;
}
if (!(cache_validity & NFS_INO_INVALID_CTIME))
reply_mask |= STATX_CTIME;
if (!(cache_validity & NFS_INO_INVALID_MTIME))
reply_mask |= STATX_MTIME;
if (!(cache_validity & NFS_INO_INVALID_SIZE))
reply_mask |= STATX_SIZE;
if (!(cache_validity & NFS_INO_INVALID_OTHER))
reply_mask |= STATX_UID | STATX_GID | STATX_MODE | STATX_NLINK;
if (!(cache_validity & NFS_INO_INVALID_BLOCKS))
@@ -1362,7 +1345,7 @@ out:
bool nfs_mapping_need_revalidate_inode(struct inode *inode)
{
return nfs_check_cache_invalid(inode, NFS_INO_REVAL_PAGECACHE) ||
return nfs_check_cache_invalid(inode, NFS_INO_INVALID_CHANGE) ||
NFS_STALE(inode);
}