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Commit c44ca040 authored by Trond Myklebust's avatar Trond Myklebust
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[PATCH] A basic NFSv4 client for 2.5.x 

This is a nontrivial change to the NFS client.

This patch does for the async WRITE and COMMIT paths what patch 15
did for the async READ path, by defining new nfs_rpc_ops ->setup_write()
and ->setup_commit().
parent 5dfe032f
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Showing with 218 additions and 141 deletions
fs/nfs/nfs3proc.c
View file @ c44ca040
......@@ -692,6 +692,101 @@ nfs3_proc_read_setup(struct nfs_read_data *data, unsigned int count)
rpc_call_setup(&data->task, &msg, 0);
}
static void
nfs3_write_done(struct rpc_task *task)
{
struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
if (nfs_async_handle_jukebox(task))
return;
nfs_writeback_done(task, data->u.v3.args.stable,
data->u.v3.args.count, data->u.v3.res.count);
}
static void
nfs3_proc_write_setup(struct nfs_write_data *data, unsigned int count, int how)
{
struct rpc_task *task = &data->task;
struct inode *inode = data->inode;
struct nfs_page *req;
int stable;
int flags;
struct rpc_message msg;
if (how & FLUSH_STABLE) {
if (!NFS_I(inode)->ncommit)
stable = NFS_FILE_SYNC;
else
stable = NFS_DATA_SYNC;
} else
stable = NFS_UNSTABLE;
req = nfs_list_entry(data->pages.next);
data->u.v3.args.fh = NFS_FH(inode);
data->u.v3.args.offset = req_offset(req) + req->wb_offset;
data->u.v3.args.pgbase = req->wb_offset;
data->u.v3.args.count = count;
data->u.v3.args.stable = stable;
data->u.v3.args.pages = data->pagevec;
data->u.v3.res.fattr = &data->fattr;
data->u.v3.res.count = count;
data->u.v3.res.verf = &data->verf;
/* Set the initial flags for the task. */
flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
/* Finalize the task. */
rpc_init_task(task, NFS_CLIENT(inode), nfs3_write_done, flags);
task->tk_calldata = data;
/* Release requests */
task->tk_release = nfs_writedata_release;
msg.rpc_proc = NFS3PROC_WRITE;
msg.rpc_argp = &data->u.v3.args;
msg.rpc_resp = &data->u.v3.res;
msg.rpc_cred = data->cred;
rpc_call_setup(&data->task, &msg, 0);
}
static void
nfs3_commit_done(struct rpc_task *task)
{
if (nfs_async_handle_jukebox(task))
return;
nfs_commit_done(task);
}
static void
nfs3_proc_commit_setup(struct nfs_write_data *data, u64 start, u32 len, int how)
{
struct rpc_task *task = &data->task;
struct inode *inode = data->inode;
int flags;
struct rpc_message msg;
data->u.v3.args.fh = NFS_FH(data->inode);
data->u.v3.args.offset = start;
data->u.v3.args.count = len;
data->u.v3.res.count = len;
data->u.v3.res.fattr = &data->fattr;
data->u.v3.res.verf = &data->verf;
/* Set the initial flags for the task. */
flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
/* Finalize the task. */
rpc_init_task(task, NFS_CLIENT(inode), nfs3_commit_done, flags);
task->tk_calldata = data;
/* Release requests */
task->tk_release = nfs_writedata_release;
msg.rpc_proc = NFS3PROC_COMMIT;
msg.rpc_argp = &data->u.v3.args;
msg.rpc_resp = &data->u.v3.res;
msg.rpc_cred = data->cred;
rpc_call_setup(&data->task, &msg, 0);
}
struct nfs_rpc_ops nfs_v3_clientops = {
.version = 3, /* protocol version */
.getroot = nfs3_proc_get_root,
......@@ -716,4 +811,6 @@ struct nfs_rpc_ops nfs_v3_clientops = {
.statfs = nfs3_proc_statfs,
.decode_dirent = nfs3_decode_dirent,
.read_setup = nfs3_proc_read_setup,
.write_setup = nfs3_proc_write_setup,
.commit_setup = nfs3_proc_commit_setup,
};
fs/nfs/proc.c
View file @ c44ca040
......@@ -512,6 +512,58 @@ nfs_proc_read_setup(struct nfs_read_data *data, unsigned int count)
rpc_call_setup(&data->task, &msg, 0);
}
static void
nfs_write_done(struct rpc_task *task)
{
struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
nfs_writeback_done(task, data->u.v3.args.stable,
data->u.v3.args.count, data->u.v3.res.count);
}
static void
nfs_proc_write_setup(struct nfs_write_data *data, unsigned int count, int how)
{
struct rpc_task *task = &data->task;
struct inode *inode = data->inode;
struct nfs_page *req;
int flags;
struct rpc_message msg;
/* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
req = nfs_list_entry(data->pages.next);
data->u.v3.args.fh = NFS_FH(inode);
data->u.v3.args.offset = req_offset(req) + req->wb_offset;
data->u.v3.args.pgbase = req->wb_offset;
data->u.v3.args.count = count;
data->u.v3.args.stable = NFS_FILE_SYNC;
data->u.v3.args.pages = data->pagevec;
data->u.v3.res.fattr = &data->fattr;
data->u.v3.res.count = count;
data->u.v3.res.verf = &data->verf;
/* Set the initial flags for the task. */
flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
/* Finalize the task. */
rpc_init_task(task, NFS_CLIENT(inode), nfs_write_done, flags);
task->tk_calldata = data;
/* Release requests */
task->tk_release = nfs_writedata_release;
msg.rpc_proc = NFSPROC_WRITE;
msg.rpc_argp = &data->u.v3.args;
msg.rpc_resp = &data->u.v3.res;
msg.rpc_cred = data->cred;
rpc_call_setup(&data->task, &msg, 0);
}
static void
nfs_proc_commit_setup(struct nfs_write_data *data, u64 start, u32 len, int how)
{
BUG();
}
struct nfs_rpc_ops nfs_v2_clientops = {
.version = 2, /* protocol version */
.getroot = nfs_proc_get_root,
......@@ -537,4 +589,6 @@ struct nfs_rpc_ops nfs_v2_clientops = {
.statfs = nfs_proc_statfs,
.decode_dirent = nfs_decode_dirent,
.read_setup = nfs_proc_read_setup,
.write_setup = nfs_proc_write_setup,
.commit_setup = nfs_proc_commit_setup,
};
fs/nfs/write.c
View file @ c44ca040
This diff is collapsed.
include/linux/nfs_fs.h
View file @ c44ca040
......@@ -323,6 +323,14 @@ extern void nfs_complete_unlink(struct dentry *);
extern int nfs_writepage(struct page *);
extern int nfs_flush_incompatible(struct file *file, struct page *page);
extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int);
extern void nfs_writeback_done(struct rpc_task *task, int stable,
unsigned int arg_count, unsigned int res_count);
extern void nfs_writedata_release(struct rpc_task *task);
#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
extern void nfs_commit_done(struct rpc_task *);
#endif
/*
* Try to write back everything synchronously (but check the
* return value!)
......
include/linux/nfs_xdr.h
View file @ c44ca040
......@@ -326,6 +326,25 @@ struct nfs_read_data {
} u;
};
struct nfs_write_data {
struct rpc_task task;
struct inode *inode;
struct rpc_cred *cred;
struct nfs_fattr fattr;
struct nfs_writeverf verf;
struct list_head pages; /* Coalesced requests we wish to flush */
struct page *pagevec[NFS_WRITE_MAXIOV];
union {
struct {
struct nfs_writeargs args;
struct nfs_writeres res;
} v3;
#ifdef CONFIG_NFS_V4
/* NFSv4 data to come here... */
#endif
} u;
};
/*
* RPC procedure vector for NFSv2/NFSv3 demuxing
*/
......@@ -374,6 +393,8 @@ struct nfs_rpc_ops {
struct nfs_fsinfo *);
u32 * (*decode_dirent)(u32 *, struct nfs_entry *, int plus);
void (*read_setup) (struct nfs_read_data *, unsigned int count);
void (*write_setup) (struct nfs_write_data *, unsigned int count, int how);
void (*commit_setup) (struct nfs_write_data *, u64 start, u32 len, int how);
};
/*
......
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