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author | Chuck Lever <chuck.lever@oracle.com> | 2010-12-14 14:58:11 (GMT) |
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committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2010-12-16 17:37:24 (GMT) |
commit | 573c4e1ef53a6b891b73cc2257e1604da754a2e4 (patch) | |
tree | b1e01ca46472ac6c936c4a144c3a160d8e1595bb /fs/nfs/nfs4xdr.c | |
parent | 8111f373600cd43b3198b48b9238e3ad2fd9908d (diff) | |
download | linux-fsl-qoriq-573c4e1ef53a6b891b73cc2257e1604da754a2e4.tar.xz |
NFS: Simplify ->decode_dirent() calling sequence
Clean up.
The pointer returned by ->decode_dirent() is no longer used as a
pointer. The only call site (xdr_decode() in fs/nfs/dir.c) simply
extracts the errno value encoded in the pointer. Replace the
returned pointer with a standard integer errno return value.
Also, pass the "server" argument as part of the nfs_entry instead of
as a separate parameter. It's faster to derive "server" in
nfs_readdir_xdr_to_array() since we already have the directory's inode
handy. "server" ought to be invariant for a set of entries in the
same directory, right?
The legacy versions of decode_dirent() don't use "server" anyway, so
it's wasted work for them to derive and pass "server" for each entry.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/nfs4xdr.c')
-rw-r--r-- | fs/nfs/nfs4xdr.c | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 868815c..be9f00a 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -6159,8 +6159,22 @@ out: } #endif /* CONFIG_NFS_V4_1 */ -__be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, - struct nfs_server *server, int plus) +/** + * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in + * the local page cache. + * @xdr: XDR stream where entry resides + * @entry: buffer to fill in with entry data + * @plus: boolean indicating whether this should be a readdirplus entry + * + * Returns zero if successful, otherwise a negative errno value is + * returned. + * + * This function is not invoked during READDIR reply decoding, but + * rather whenever an application invokes the getdents(2) system call + * on a directory already in our cache. + */ +int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, + int plus) { uint32_t bitmap[2] = {0}; uint32_t len; @@ -6172,9 +6186,9 @@ __be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, if (unlikely(!p)) goto out_overflow; if (!ntohl(*p++)) - return ERR_PTR(-EAGAIN); + return -EAGAIN; entry->eof = 1; - return ERR_PTR(-EBADCOOKIE); + return -EBADCOOKIE; } p = xdr_inline_decode(xdr, 12); @@ -6203,7 +6217,8 @@ __be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, if (decode_attr_length(xdr, &len, &p) < 0) goto out_overflow; - if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh, server, 1) < 0) + if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh, + entry->server, 1) < 0) goto out_overflow; if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID) entry->ino = entry->fattr->fileid; @@ -6221,11 +6236,11 @@ __be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, else entry->eof = 0; - return p; + return 0; out_overflow: print_overflow_msg(__func__, xdr); - return ERR_PTR(-EAGAIN); + return -EAGAIN; } /* |