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-rw-r--r--fs/nfs/direct.c66
1 files changed, 15 insertions, 51 deletions
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 8f5d2df..6ecde96 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -321,7 +321,7 @@ static ssize_t nfs_direct_read_wait(struct nfs_direct_req *dreq, int intr)
return (ssize_t) result;
}
-static ssize_t nfs_direct_read_seg(struct inode *inode, struct nfs_open_context *ctx, unsigned long user_addr, size_t count, loff_t file_offset, struct page **pages, unsigned int nr_pages)
+static ssize_t nfs_direct_read(struct inode *inode, struct nfs_open_context *ctx, unsigned long user_addr, size_t count, loff_t file_offset, struct page **pages, unsigned int nr_pages)
{
ssize_t result;
sigset_t oldset;
@@ -346,48 +346,6 @@ static ssize_t nfs_direct_read_seg(struct inode *inode, struct nfs_open_context
return result;
}
-/*
- * We've already pushed out any non-direct writes so that this read
- * will see them when we read from the server.
- */
-static ssize_t nfs_direct_read(struct inode *inode, struct nfs_open_context *ctx, const struct iovec *iov, loff_t file_offset, unsigned long nr_segs)
-{
- ssize_t tot_bytes = 0;
- unsigned long seg = 0;
-
- while ((seg < nr_segs) && (tot_bytes >= 0)) {
- ssize_t result;
- int page_count;
- struct page **pages;
- const struct iovec *vec = &iov[seg++];
- unsigned long user_addr = (unsigned long) vec->iov_base;
- size_t size = vec->iov_len;
-
- page_count = nfs_get_user_pages(READ, user_addr, size, &pages);
- if (page_count < 0) {
- nfs_free_user_pages(pages, 0, 0);
- if (tot_bytes > 0)
- break;
- return page_count;
- }
-
- result = nfs_direct_read_seg(inode, ctx, user_addr, size,
- file_offset, pages, page_count);
-
- if (result <= 0) {
- if (tot_bytes > 0)
- break;
- return result;
- }
- tot_bytes += result;
- file_offset += result;
- if (result < size)
- break;
- }
-
- return tot_bytes;
-}
-
static ssize_t nfs_direct_write_seg(struct inode *inode, struct nfs_open_context *ctx, unsigned long user_addr, size_t count, loff_t file_offset, struct page **pages, int nr_pages)
{
const unsigned int wsize = NFS_SERVER(inode)->wsize;
@@ -559,16 +517,13 @@ static ssize_t nfs_direct_write(struct inode *inode, struct nfs_open_context *ct
ssize_t nfs_file_direct_read(struct kiocb *iocb, char __user *buf, size_t count, loff_t pos)
{
ssize_t retval = -EINVAL;
- loff_t *ppos = &iocb->ki_pos;
+ int page_count;
+ struct page **pages;
struct file *file = iocb->ki_filp;
struct nfs_open_context *ctx =
(struct nfs_open_context *) file->private_data;
struct address_space *mapping = file->f_mapping;
struct inode *inode = mapping->host;
- struct iovec iov = {
- .iov_base = buf,
- .iov_len = count,
- };
dprintk("nfs: direct read(%s/%s, %lu@%Ld)\n",
file->f_dentry->d_parent->d_name.name,
@@ -580,7 +535,7 @@ ssize_t nfs_file_direct_read(struct kiocb *iocb, char __user *buf, size_t count,
if (count < 0)
goto out;
retval = -EFAULT;
- if (!access_ok(VERIFY_WRITE, iov.iov_base, iov.iov_len))
+ if (!access_ok(VERIFY_WRITE, buf, count))
goto out;
retval = 0;
if (!count)
@@ -590,9 +545,18 @@ ssize_t nfs_file_direct_read(struct kiocb *iocb, char __user *buf, size_t count,
if (retval)
goto out;
- retval = nfs_direct_read(inode, ctx, &iov, pos, 1);
+ page_count = nfs_get_user_pages(READ, (unsigned long) buf,
+ count, &pages);
+ if (page_count < 0) {
+ nfs_free_user_pages(pages, 0, 0);
+ retval = page_count;
+ goto out;
+ }
+
+ retval = nfs_direct_read(inode, ctx, (unsigned long) buf, count, pos,
+ pages, page_count);
if (retval > 0)
- *ppos = pos + retval;
+ iocb->ki_pos = pos + retval;
out:
return retval;
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