mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 03:40:52 +07:00
NFS: Remove nfs_readpage_sync()
It makes no sense to maintain 2 parallel systems for reading in pages. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
parent
c228fd3aee
commit
8e0969f045
@ -253,29 +253,6 @@ static int nfs3_proc_readlink(struct inode *inode, struct page *page,
|
||||
return status;
|
||||
}
|
||||
|
||||
static int nfs3_proc_read(struct nfs_read_data *rdata)
|
||||
{
|
||||
int flags = rdata->flags;
|
||||
struct inode * inode = rdata->inode;
|
||||
struct nfs_fattr * fattr = rdata->res.fattr;
|
||||
struct rpc_message msg = {
|
||||
.rpc_proc = &nfs3_procedures[NFS3PROC_READ],
|
||||
.rpc_argp = &rdata->args,
|
||||
.rpc_resp = &rdata->res,
|
||||
.rpc_cred = rdata->cred,
|
||||
};
|
||||
int status;
|
||||
|
||||
dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
|
||||
(long long) rdata->args.offset);
|
||||
nfs_fattr_init(fattr);
|
||||
status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags);
|
||||
if (status >= 0)
|
||||
nfs_refresh_inode(inode, fattr);
|
||||
dprintk("NFS reply read: %d\n", status);
|
||||
return status;
|
||||
}
|
||||
|
||||
/*
|
||||
* Create a regular file.
|
||||
* For now, we don't implement O_EXCL.
|
||||
@ -855,7 +832,6 @@ const struct nfs_rpc_ops nfs_v3_clientops = {
|
||||
.lookup = nfs3_proc_lookup,
|
||||
.access = nfs3_proc_access,
|
||||
.readlink = nfs3_proc_readlink,
|
||||
.read = nfs3_proc_read,
|
||||
.create = nfs3_proc_create,
|
||||
.remove = nfs3_proc_remove,
|
||||
.unlink_setup = nfs3_proc_unlink_setup,
|
||||
|
@ -1734,44 +1734,6 @@ static int nfs4_proc_readlink(struct inode *inode, struct page *page,
|
||||
return err;
|
||||
}
|
||||
|
||||
static int _nfs4_proc_read(struct nfs_read_data *rdata)
|
||||
{
|
||||
int flags = rdata->flags;
|
||||
struct inode *inode = rdata->inode;
|
||||
struct nfs_fattr *fattr = rdata->res.fattr;
|
||||
struct nfs_server *server = NFS_SERVER(inode);
|
||||
struct rpc_message msg = {
|
||||
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
|
||||
.rpc_argp = &rdata->args,
|
||||
.rpc_resp = &rdata->res,
|
||||
.rpc_cred = rdata->cred,
|
||||
};
|
||||
unsigned long timestamp = jiffies;
|
||||
int status;
|
||||
|
||||
dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
|
||||
(long long) rdata->args.offset);
|
||||
|
||||
nfs_fattr_init(fattr);
|
||||
status = rpc_call_sync(server->client, &msg, flags);
|
||||
if (!status)
|
||||
renew_lease(server, timestamp);
|
||||
dprintk("NFS reply read: %d\n", status);
|
||||
return status;
|
||||
}
|
||||
|
||||
static int nfs4_proc_read(struct nfs_read_data *rdata)
|
||||
{
|
||||
struct nfs4_exception exception = { };
|
||||
int err;
|
||||
do {
|
||||
err = nfs4_handle_exception(NFS_SERVER(rdata->inode),
|
||||
_nfs4_proc_read(rdata),
|
||||
&exception);
|
||||
} while (exception.retry);
|
||||
return err;
|
||||
}
|
||||
|
||||
/*
|
||||
* Got race?
|
||||
* We will need to arrange for the VFS layer to provide an atomic open.
|
||||
@ -3643,7 +3605,6 @@ const struct nfs_rpc_ops nfs_v4_clientops = {
|
||||
.lookup = nfs4_proc_lookup,
|
||||
.access = nfs4_proc_access,
|
||||
.readlink = nfs4_proc_readlink,
|
||||
.read = nfs4_proc_read,
|
||||
.create = nfs4_proc_create,
|
||||
.remove = nfs4_proc_remove,
|
||||
.unlink_setup = nfs4_proc_unlink_setup,
|
||||
|
@ -186,35 +186,6 @@ static int nfs_proc_readlink(struct inode *inode, struct page *page,
|
||||
return status;
|
||||
}
|
||||
|
||||
static int nfs_proc_read(struct nfs_read_data *rdata)
|
||||
{
|
||||
int flags = rdata->flags;
|
||||
struct inode * inode = rdata->inode;
|
||||
struct nfs_fattr * fattr = rdata->res.fattr;
|
||||
struct rpc_message msg = {
|
||||
.rpc_proc = &nfs_procedures[NFSPROC_READ],
|
||||
.rpc_argp = &rdata->args,
|
||||
.rpc_resp = &rdata->res,
|
||||
.rpc_cred = rdata->cred,
|
||||
};
|
||||
int status;
|
||||
|
||||
dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
|
||||
(long long) rdata->args.offset);
|
||||
nfs_fattr_init(fattr);
|
||||
status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags);
|
||||
if (status >= 0) {
|
||||
nfs_refresh_inode(inode, fattr);
|
||||
/* Emulate the eof flag, which isn't normally needed in NFSv2
|
||||
* as it is guaranteed to always return the file attributes
|
||||
*/
|
||||
if (rdata->args.offset + rdata->args.count >= fattr->size)
|
||||
rdata->res.eof = 1;
|
||||
}
|
||||
dprintk("NFS reply read: %d\n", status);
|
||||
return status;
|
||||
}
|
||||
|
||||
static int
|
||||
nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
|
||||
int flags, struct nameidata *nd)
|
||||
@ -666,7 +637,6 @@ const struct nfs_rpc_ops nfs_v2_clientops = {
|
||||
.lookup = nfs_proc_lookup,
|
||||
.access = NULL, /* access */
|
||||
.readlink = nfs_proc_readlink,
|
||||
.read = nfs_proc_read,
|
||||
.create = nfs_proc_create,
|
||||
.remove = nfs_proc_remove,
|
||||
.unlink_setup = nfs_proc_unlink_setup,
|
||||
|
105
fs/nfs/read.c
105
fs/nfs/read.c
@ -5,14 +5,6 @@
|
||||
*
|
||||
* Partial copy of Linus' read cache modifications to fs/nfs/file.c
|
||||
* modified for async RPC by okir@monad.swb.de
|
||||
*
|
||||
* We do an ugly hack here in order to return proper error codes to the
|
||||
* user program when a read request failed: since generic_file_read
|
||||
* only checks the return value of inode->i_op->readpage() which is always 0
|
||||
* for async RPC, we set the error bit of the page to 1 when an error occurs,
|
||||
* and make nfs_readpage transmit requests synchronously when encountering this.
|
||||
* This is only a small problem, though, since we now retry all operations
|
||||
* within the RPC code when root squashing is suspected.
|
||||
*/
|
||||
|
||||
#include <linux/time.h>
|
||||
@ -122,93 +114,6 @@ static void nfs_readpage_truncate_uninitialised_page(struct nfs_read_data *data)
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Read a page synchronously.
|
||||
*/
|
||||
static int nfs_readpage_sync(struct nfs_open_context *ctx, struct inode *inode,
|
||||
struct page *page)
|
||||
{
|
||||
unsigned int rsize = NFS_SERVER(inode)->rsize;
|
||||
unsigned int count = PAGE_CACHE_SIZE;
|
||||
int result = -ENOMEM;
|
||||
struct nfs_read_data *rdata;
|
||||
|
||||
rdata = nfs_readdata_alloc(count);
|
||||
if (!rdata)
|
||||
goto out_unlock;
|
||||
|
||||
memset(rdata, 0, sizeof(*rdata));
|
||||
rdata->flags = (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
|
||||
rdata->cred = ctx->cred;
|
||||
rdata->inode = inode;
|
||||
INIT_LIST_HEAD(&rdata->pages);
|
||||
rdata->args.fh = NFS_FH(inode);
|
||||
rdata->args.context = ctx;
|
||||
rdata->args.pages = &page;
|
||||
rdata->args.pgbase = 0UL;
|
||||
rdata->args.count = rsize;
|
||||
rdata->res.fattr = &rdata->fattr;
|
||||
|
||||
dprintk("NFS: nfs_readpage_sync(%p)\n", page);
|
||||
|
||||
/*
|
||||
* This works now because the socket layer never tries to DMA
|
||||
* into this buffer directly.
|
||||
*/
|
||||
do {
|
||||
if (count < rsize)
|
||||
rdata->args.count = count;
|
||||
rdata->res.count = rdata->args.count;
|
||||
rdata->args.offset = page_offset(page) + rdata->args.pgbase;
|
||||
|
||||
dprintk("NFS: nfs_proc_read(%s, (%s/%Ld), %Lu, %u)\n",
|
||||
NFS_SERVER(inode)->nfs_client->cl_hostname,
|
||||
inode->i_sb->s_id,
|
||||
(long long)NFS_FILEID(inode),
|
||||
(unsigned long long)rdata->args.pgbase,
|
||||
rdata->args.count);
|
||||
|
||||
lock_kernel();
|
||||
result = NFS_PROTO(inode)->read(rdata);
|
||||
unlock_kernel();
|
||||
|
||||
/*
|
||||
* Even if we had a partial success we can't mark the page
|
||||
* cache valid.
|
||||
*/
|
||||
if (result < 0) {
|
||||
if (result == -EISDIR)
|
||||
result = -EINVAL;
|
||||
goto io_error;
|
||||
}
|
||||
count -= result;
|
||||
rdata->args.pgbase += result;
|
||||
nfs_add_stats(inode, NFSIOS_SERVERREADBYTES, result);
|
||||
|
||||
/* Note: result == 0 should only happen if we're caching
|
||||
* a write that extends the file and punches a hole.
|
||||
*/
|
||||
if (rdata->res.eof != 0 || result == 0)
|
||||
break;
|
||||
} while (count);
|
||||
spin_lock(&inode->i_lock);
|
||||
NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
|
||||
spin_unlock(&inode->i_lock);
|
||||
|
||||
if (rdata->res.eof || rdata->res.count == rdata->args.count) {
|
||||
SetPageUptodate(page);
|
||||
if (rdata->res.eof && count != 0)
|
||||
memclear_highpage_flush(page, rdata->args.pgbase, count);
|
||||
}
|
||||
result = 0;
|
||||
|
||||
io_error:
|
||||
nfs_readdata_free(rdata);
|
||||
out_unlock:
|
||||
unlock_page(page);
|
||||
return result;
|
||||
}
|
||||
|
||||
static int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode,
|
||||
struct page *page)
|
||||
{
|
||||
@ -621,15 +526,9 @@ int nfs_readpage(struct file *file, struct page *page)
|
||||
} else
|
||||
ctx = get_nfs_open_context((struct nfs_open_context *)
|
||||
file->private_data);
|
||||
if (!IS_SYNC(inode)) {
|
||||
error = nfs_readpage_async(ctx, inode, page);
|
||||
goto out;
|
||||
}
|
||||
|
||||
error = nfs_readpage_sync(ctx, inode, page);
|
||||
if (error < 0 && IS_SWAPFILE(inode))
|
||||
printk("Aiee.. nfs swap-in of page failed!\n");
|
||||
out:
|
||||
error = nfs_readpage_async(ctx, inode, page);
|
||||
|
||||
put_nfs_open_context(ctx);
|
||||
return error;
|
||||
|
||||
|
@ -784,7 +784,6 @@ struct nfs_rpc_ops {
|
||||
int (*access) (struct inode *, struct nfs_access_entry *);
|
||||
int (*readlink)(struct inode *, struct page *, unsigned int,
|
||||
unsigned int);
|
||||
int (*read) (struct nfs_read_data *);
|
||||
int (*create) (struct inode *, struct dentry *,
|
||||
struct iattr *, int, struct nameidata *);
|
||||
int (*remove) (struct inode *, struct qstr *);
|
||||
|
Loading…
Reference in New Issue
Block a user