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authorTrond Myklebust <trond.myklebust@primarydata.com>2015-10-21 15:42:20 -0500
committerTrond Myklebust <trond.myklebust@primarydata.com>2015-10-21 15:42:20 -0500
commit51e0164ebe374a26245312515af4ceae11bed4ae (patch)
tree6eb3f1c792c7a575be020b382e1cacf7bd08f940 /fs/nfs
parent120bf961b90adb8e76be827b1a68efe3d1019419 (diff)
parentb9788a446828703cf126dfb9d3843d240af44122 (diff)
Merge branch 'nfsclone'
* nfsclone: nfs: add missing linux/types.h NFS: Fix an 'unused variable' complaint when #ifndef CONFIG_NFS_V4_2 nfs42: add NFS_IOC_CLONE_RANGE ioctl nfs42: respect clone_blksize nfs: get clone_blksize when probing fsinfo nfs42: add NFS_IOC_CLONE ioctl nfs42: add CLONE proc functions nfs42: add CLONE xdr functions
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/client.c1
-rw-r--r--fs/nfs/nfs42.h1
-rw-r--r--fs/nfs/nfs42proc.c71
-rw-r--r--fs/nfs/nfs42xdr.c97
-rw-r--r--fs/nfs/nfs4file.c136
-rw-r--r--fs/nfs/nfs4proc.c4
-rw-r--r--fs/nfs/nfs4xdr.c26
7 files changed, 334 insertions, 2 deletions
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 57c5a02f6213..d6d5d2a48e83 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -764,6 +764,7 @@ 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/nfs42.h b/fs/nfs/nfs42.h
index 814c1255f1d2..b587ccd31083 100644
--- a/fs/nfs/nfs42.h
+++ b/fs/nfs/nfs42.h
@@ -17,5 +17,6 @@ int nfs42_proc_deallocate(struct file *, loff_t, loff_t);
loff_t nfs42_proc_llseek(struct file *, loff_t, int);
int nfs42_proc_layoutstats_generic(struct nfs_server *,
struct nfs42_layoutstat_data *);
+int nfs42_proc_clone(struct file *, struct file *, loff_t, loff_t, loff_t);
#endif /* __LINUX_FS_NFS_NFS4_2_H */
diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index 0f020e4d8421..3e92a3cde15d 100644
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -271,3 +271,74 @@ int nfs42_proc_layoutstats_generic(struct nfs_server *server,
return PTR_ERR(task);
return 0;
}
+
+static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
+ struct file *dst_f, loff_t src_offset,
+ loff_t dst_offset, loff_t count)
+{
+ struct inode *src_inode = file_inode(src_f);
+ struct inode *dst_inode = file_inode(dst_f);
+ struct nfs_server *server = NFS_SERVER(dst_inode);
+ struct nfs42_clone_args args = {
+ .src_fh = NFS_FH(src_inode),
+ .dst_fh = NFS_FH(dst_inode),
+ .src_offset = src_offset,
+ .dst_offset = dst_offset,
+ .dst_bitmask = server->cache_consistency_bitmask,
+ };
+ struct nfs42_clone_res res = {
+ .server = server,
+ };
+ int status;
+
+ msg->rpc_argp = &args;
+ msg->rpc_resp = &res;
+
+ status = nfs42_set_rw_stateid(&args.src_stateid, src_f, FMODE_READ);
+ if (status)
+ return status;
+
+ status = nfs42_set_rw_stateid(&args.dst_stateid, dst_f, FMODE_WRITE);
+ if (status)
+ return status;
+
+ res.dst_fattr = nfs_alloc_fattr();
+ if (!res.dst_fattr)
+ return -ENOMEM;
+
+ status = nfs4_call_sync(server->client, server, msg,
+ &args.seq_args, &res.seq_res, 0);
+ if (status == 0)
+ status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
+
+ kfree(res.dst_fattr);
+ return status;
+}
+
+int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
+ loff_t src_offset, loff_t dst_offset, loff_t count)
+{
+ struct rpc_message msg = {
+ .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
+ };
+ struct inode *inode = file_inode(src_f);
+ struct nfs_server *server = NFS_SERVER(file_inode(src_f));
+ struct nfs4_exception exception = { };
+ int err;
+
+ if (!nfs_server_capable(inode, NFS_CAP_CLONE))
+ return -EOPNOTSUPP;
+
+ do {
+ err = _nfs42_proc_clone(&msg, src_f, dst_f, src_offset,
+ dst_offset, count);
+ if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
+ NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
+ return -EOPNOTSUPP;
+ }
+ err = nfs4_handle_exception(server, err, &exception);
+ } while (exception.retry);
+
+ return err;
+
+}
diff --git a/fs/nfs/nfs42xdr.c b/fs/nfs/nfs42xdr.c
index 0eb29e14070d..0ca482a51e53 100644
--- a/fs/nfs/nfs42xdr.c
+++ b/fs/nfs/nfs42xdr.c
@@ -34,6 +34,12 @@
1 /* opaque devaddr4 length */ + \
XDR_QUADLEN(PNFS_LAYOUTSTATS_MAXSIZE))
#define decode_layoutstats_maxsz (op_decode_hdr_maxsz)
+#define encode_clone_maxsz (encode_stateid_maxsz + \
+ encode_stateid_maxsz + \
+ 2 /* src offset */ + \
+ 2 /* dst offset */ + \
+ 2 /* count */)
+#define decode_clone_maxsz (op_decode_hdr_maxsz)
#define NFS4_enc_allocate_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
@@ -65,7 +71,20 @@
decode_sequence_maxsz + \
decode_putfh_maxsz + \
PNFS_LAYOUTSTATS_MAXDEV * decode_layoutstats_maxsz)
-
+#define NFS4_enc_clone_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_savefh_maxsz + \
+ encode_putfh_maxsz + \
+ encode_clone_maxsz + \
+ encode_getattr_maxsz)
+#define NFS4_dec_clone_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_savefh_maxsz + \
+ decode_putfh_maxsz + \
+ decode_clone_maxsz + \
+ decode_getattr_maxsz)
static void encode_fallocate(struct xdr_stream *xdr,
struct nfs42_falloc_args *args)
@@ -128,6 +147,21 @@ static void encode_layoutstats(struct xdr_stream *xdr,
encode_uint32(xdr, 0);
}
+static void encode_clone(struct xdr_stream *xdr,
+ struct nfs42_clone_args *args,
+ struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ encode_op_hdr(xdr, OP_CLONE, decode_clone_maxsz, hdr);
+ encode_nfs4_stateid(xdr, &args->src_stateid);
+ encode_nfs4_stateid(xdr, &args->dst_stateid);
+ p = reserve_space(xdr, 3*8);
+ p = xdr_encode_hyper(p, args->src_offset);
+ p = xdr_encode_hyper(p, args->dst_offset);
+ xdr_encode_hyper(p, args->count);
+}
+
/*
* Encode ALLOCATE request
*/
@@ -206,6 +240,27 @@ static void nfs4_xdr_enc_layoutstats(struct rpc_rqst *req,
encode_nops(&hdr);
}
+/*
+ * Encode CLONE request
+ */
+static void nfs4_xdr_enc_clone(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs42_clone_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->src_fh, &hdr);
+ encode_savefh(xdr, &hdr);
+ encode_putfh(xdr, args->dst_fh, &hdr);
+ encode_clone(xdr, args, &hdr);
+ encode_getfattr(xdr, args->dst_bitmask, &hdr);
+ encode_nops(&hdr);
+}
+
static int decode_allocate(struct xdr_stream *xdr, struct nfs42_falloc_res *res)
{
return decode_op_hdr(xdr, OP_ALLOCATE);
@@ -243,6 +298,11 @@ static int decode_layoutstats(struct xdr_stream *xdr)
return decode_op_hdr(xdr, OP_LAYOUTSTATS);
}
+static int decode_clone(struct xdr_stream *xdr)
+{
+ return decode_op_hdr(xdr, OP_CLONE);
+}
+
/*
* Decode ALLOCATE request
*/
@@ -351,4 +411,39 @@ out:
return status;
}
+/*
+ * Decode CLONE request
+ */
+static int nfs4_xdr_dec_clone(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs42_clone_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_savefh(xdr);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_clone(xdr);
+ if (status)
+ goto out;
+ status = decode_getfattr(xdr, res->dst_fattr, res->server);
+
+out:
+ res->rpc_status = status;
+ return status;
+}
+
#endif /* __LINUX_FS_NFS_NFS4_2XDR_H */
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index b0dbe0abed53..4aa571956cd6 100644
--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -4,6 +4,7 @@
* Copyright (C) 1992 Rick Sladkey
*/
#include <linux/fs.h>
+#include <linux/file.h>
#include <linux/falloc.h>
#include <linux/nfs_fs.h>
#include "delegation.h"
@@ -192,8 +193,138 @@ static long nfs42_fallocate(struct file *filep, int mode, loff_t offset, loff_t
return nfs42_proc_deallocate(filep, offset, len);
return nfs42_proc_allocate(filep, offset, len);
}
+
+static noinline long
+nfs42_ioctl_clone(struct file *dst_file, unsigned long srcfd,
+ u64 src_off, u64 dst_off, u64 count)
+{
+ struct inode *dst_inode = file_inode(dst_file);
+ struct nfs_server *server = NFS_SERVER(dst_inode);
+ struct fd src_file;
+ struct inode *src_inode;
+ unsigned int bs = server->clone_blksize;
+ int ret;
+
+ /* dst file must be opened for writing */
+ if (!(dst_file->f_mode & FMODE_WRITE))
+ return -EINVAL;
+
+ ret = mnt_want_write_file(dst_file);
+ if (ret)
+ return ret;
+
+ src_file = fdget(srcfd);
+ if (!src_file.file) {
+ ret = -EBADF;
+ goto out_drop_write;
+ }
+
+ src_inode = file_inode(src_file.file);
+
+ /* src and dst must be different files */
+ ret = -EINVAL;
+ if (src_inode == dst_inode)
+ goto out_fput;
+
+ /* src file must be opened for reading */
+ if (!(src_file.file->f_mode & FMODE_READ))
+ goto out_fput;
+
+ /* src and dst must be regular files */
+ ret = -EISDIR;
+ if (!S_ISREG(src_inode->i_mode) || !S_ISREG(dst_inode->i_mode))
+ goto out_fput;
+
+ ret = -EXDEV;
+ if (src_file.file->f_path.mnt != dst_file->f_path.mnt ||
+ src_inode->i_sb != dst_inode->i_sb)
+ goto out_fput;
+
+ /* check alignment w.r.t. clone_blksize */
+ ret = -EINVAL;
+ if (bs) {
+ if (!IS_ALIGNED(src_off, bs) || !IS_ALIGNED(dst_off, bs))
+ goto out_fput;
+ if (!IS_ALIGNED(count, bs) && i_size_read(src_inode) != (src_off + count))
+ goto out_fput;
+ }
+
+ /* XXX: do we lock at all? what if server needs CB_RECALL_LAYOUT? */
+ if (dst_inode < src_inode) {
+ mutex_lock_nested(&dst_inode->i_mutex, I_MUTEX_PARENT);
+ mutex_lock_nested(&src_inode->i_mutex, I_MUTEX_CHILD);
+ } else {
+ mutex_lock_nested(&src_inode->i_mutex, I_MUTEX_PARENT);
+ mutex_lock_nested(&dst_inode->i_mutex, I_MUTEX_CHILD);
+ }
+
+ /* flush all pending writes on both src and dst so that server
+ * has the latest data */
+ ret = nfs_sync_inode(src_inode);
+ if (ret)
+ goto out_unlock;
+ ret = nfs_sync_inode(dst_inode);
+ if (ret)
+ goto out_unlock;
+
+ ret = nfs42_proc_clone(src_file.file, dst_file, src_off, dst_off, count);
+
+ /* truncate inode page cache of the dst range so that future reads can fetch
+ * new data from server */
+ if (!ret)
+ truncate_inode_pages_range(&dst_inode->i_data, dst_off, dst_off + count - 1);
+
+out_unlock:
+ if (dst_inode < src_inode) {
+ mutex_unlock(&src_inode->i_mutex);
+ mutex_unlock(&dst_inode->i_mutex);
+ } else {
+ mutex_unlock(&dst_inode->i_mutex);
+ mutex_unlock(&src_inode->i_mutex);
+ }
+out_fput:
+ fdput(src_file);
+out_drop_write:
+ mnt_drop_write_file(dst_file);
+ return ret;
+}
+
+static long nfs42_ioctl_clone_range(struct file *dst_file, void __user *argp)
+{
+ struct nfs_ioctl_clone_range_args args;
+
+ if (copy_from_user(&args, argp, sizeof(args)))
+ return -EFAULT;
+
+ return nfs42_ioctl_clone(dst_file, args.src_fd, args.src_off, args.dst_off, args.count);
+}
+#else
+static long nfs42_ioctl_clone(struct file *dst_file, unsigned long srcfd,
+ u64 src_off, u64 dst_off, u64 count)
+{
+ return -ENOTTY;
+}
+
+static long nfs42_ioctl_clone_range(struct file *dst_file, void __user *argp)
+{
+ return -ENOTTY;
+}
#endif /* CONFIG_NFS_V4_2 */
+long nfs4_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+
+ switch (cmd) {
+ case NFS_IOC_CLONE:
+ return nfs42_ioctl_clone(file, arg, 0, 0, 0);
+ case NFS_IOC_CLONE_RANGE:
+ return nfs42_ioctl_clone_range(file, argp);
+ }
+
+ return -ENOTTY;
+}
+
const struct file_operations nfs4_file_operations = {
#ifdef CONFIG_NFS_V4_2
.llseek = nfs4_file_llseek,
@@ -216,4 +347,9 @@ const struct file_operations nfs4_file_operations = {
#endif /* CONFIG_NFS_V4_2 */
.check_flags = nfs_check_flags,
.setlease = simple_nosetlease,
+#ifdef CONFIG_COMPAT
+ .unlocked_ioctl = nfs4_ioctl,
+#else
+ .compat_ioctl = nfs4_ioctl,
+#endif /* CONFIG_COMPAT */
};
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index e32b7e93f253..87a081c6299d 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -238,6 +238,7 @@ 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] = {
@@ -8728,7 +8729,8 @@ static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
| NFS_CAP_ALLOCATE
| NFS_CAP_DEALLOCATE
| NFS_CAP_SEEK
- | NFS_CAP_LAYOUTSTATS,
+ | NFS_CAP_LAYOUTSTATS
+ | NFS_CAP_CLONE,
.init_client = nfs41_init_client,
.shutdown_client = nfs41_shutdown_client,
.match_stateid = nfs41_match_stateid,
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 788adf3897c7..9f656791a338 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -4764,6 +4764,28 @@ 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;
@@ -4798,6 +4820,9 @@ 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:
@@ -7465,6 +7490,7 @@ struct rpc_procinfo nfs4_procedures[] = {
PROC(ALLOCATE, enc_allocate, dec_allocate),
PROC(DEALLOCATE, enc_deallocate, dec_deallocate),
PROC(LAYOUTSTATS, enc_layoutstats, dec_layoutstats),
+ PROC(CLONE, enc_clone, dec_clone),
#endif /* CONFIG_NFS_V4_2 */
};