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| author | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-09-06 02:06:57 +0300 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-09-07 19:36:13 +0300 |
| commit | 7d160a6c462c2c690e074c173b43aad7204049ad (patch) | |
| tree | 6967b9cffa27592690259622031e87e27919d61b /fs/nfs/nfs4xdr.c | |
| parent | 4eae50143bcbfda819c650b7ed6739f3b6338ffc (diff) | |
| download | linux-7d160a6c462c2c690e074c173b43aad7204049ad.tar.xz | |
NFSv4: Express delegation limit in units of pages
Since we're tracking modifications to the page cache on a per-page
basis, it makes sense to express the limit to how much we may cache
in units of pages.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs/nfs4xdr.c')
| -rw-r--r-- | fs/nfs/nfs4xdr.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index ff4784c54e04..788adf3897c7 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -4932,24 +4932,28 @@ static int decode_lookup(struct xdr_stream *xdr) } /* This is too sick! */ -static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize) +static int decode_space_limit(struct xdr_stream *xdr, + unsigned long *pagemod_limit) { __be32 *p; uint32_t limit_type, nblocks, blocksize; + u64 maxsize = 0; p = xdr_inline_decode(xdr, 12); if (unlikely(!p)) goto out_overflow; limit_type = be32_to_cpup(p++); switch (limit_type) { - case 1: - xdr_decode_hyper(p, maxsize); + case NFS4_LIMIT_SIZE: + xdr_decode_hyper(p, &maxsize); break; - case 2: + case NFS4_LIMIT_BLOCKS: nblocks = be32_to_cpup(p++); blocksize = be32_to_cpup(p); - *maxsize = (uint64_t)nblocks * (uint64_t)blocksize; + maxsize = (uint64_t)nblocks * (uint64_t)blocksize; } + maxsize >>= PAGE_CACHE_SHIFT; + *pagemod_limit = min_t(u64, maxsize, ULONG_MAX); return 0; out_overflow: print_overflow_msg(__func__, xdr); @@ -4977,7 +4981,7 @@ static int decode_rw_delegation(struct xdr_stream *xdr, break; case NFS4_OPEN_DELEGATE_WRITE: res->delegation_type = FMODE_WRITE|FMODE_READ; - if (decode_space_limit(xdr, &res->maxsize) < 0) + if (decode_space_limit(xdr, &res->pagemod_limit) < 0) return -EIO; } return decode_ace(xdr, NULL, res->server->nfs_client); |