NFSv42 CLONE operation is supposed to respect it.
Signed-off-by: Peng Tao <tao.peng@xxxxxxxxxxxxxxx>
---
fs/nfs/client.c | 1 +
fs/nfs/nfs4proc.c | 1 +
fs/nfs/nfs4xdr.c | 25 +++++++++++++++++++++++++
include/linux/nfs4.h | 1 +
include/linux/nfs_fs_sb.h | 1 +
include/linux/nfs_xdr.h | 1 +
6 files changed, 30 insertions(+)
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index ecebb40..51793ab 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -873,6 +873,7 @@ static void nfs_server_set_fsinfo(struct nfs_server *server,
server->time_delta = fsinfo->time_delta;
+ server->clone_blksize = fsinfo->clone_blksize;
/* We're airborne Set socket buffersize */
rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
}
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index a61e815..04c8adc 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -239,6 +239,7 @@ const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
FATTR4_WORD1_TIME_DELTA
| FATTR4_WORD1_FS_LAYOUT_TYPES,
FATTR4_WORD2_LAYOUT_BLKSIZE
+ | FATTR4_WORD2_CLONE_BLKSIZE
};
const u32 nfs4_fs_locations_bitmap[3] = {
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index d9ea209..8d621e9 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -4735,6 +4735,28 @@ static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
return 0;
}
+/*
+ * The granularity of a CLONE operation.
+ */
+static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
+ uint32_t *res)
+{
+ __be32 *p;
+
+ dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
+ *res = 0;
+ if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p)) {
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+ }
+ *res = be32_to_cpup(p);
+ bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
+ }
+ return 0;
+}
+
static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
{
unsigned int savep;
@@ -4769,6 +4791,9 @@ static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
if (status)
goto xdr_error;
+ status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
+ if (status)
+ goto xdr_error;
status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
index 7ccb06a..e865be4 100644
--- a/include/linux/nfs4.h
+++ b/include/linux/nfs4.h
@@ -422,6 +422,7 @@ enum lock_type4 {
#define FATTR4_WORD2_LAYOUT_TYPES (1UL << 0)
#define FATTR4_WORD2_LAYOUT_BLKSIZE (1UL << 1)
#define FATTR4_WORD2_MDSTHRESHOLD (1UL << 4)
+#define FATTR4_WORD2_CLONE_BLKSIZE (1UL << 13)
#define FATTR4_WORD2_SECURITY_LABEL (1UL << 16)
/* MDS threshold bitmap bits */
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index 682b751..4fb8fca 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -147,6 +147,7 @@ struct nfs_server {
unsigned int acdirmax;
unsigned int namelen;
unsigned int options; /* extra options enabled by mount */
+ unsigned int clone_blksize; /* granularity of a CLONE operation */
#define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */
#define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 838b7b6..7998133 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -141,6 +141,7 @@ struct nfs_fsinfo {
__u32 lease_time; /* in seconds */
__u32 layouttype; /* supported pnfs layout driver */
__u32 blksize; /* preferred pnfs io block size */
+ __u32 clone_blksize; /* granularity of a CLONE operation */
};
struct nfs_fsstat {
--
1.8.3.1
--
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