return atomic_dec_and_test(&dreq->io_count);
}
-/*
- * "size" is never larger than rsize or wsize.
- */
-static inline int nfs_direct_count_pages(unsigned long user_addr, size_t size)
-{
- int page_count;
-
- page_count = (user_addr + size + PAGE_SIZE - 1) >> PAGE_SHIFT;
- page_count -= user_addr >> PAGE_SHIFT;
- BUG_ON(page_count < 0);
-
- return page_count;
-}
-
-static inline unsigned int nfs_max_pages(unsigned int size)
-{
- return (size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
-}
-
/**
* nfs_direct_IO - NFS address space operation for direct I/O
* @rw: direction (read or write)
struct nfs_open_context *ctx = dreq->ctx;
struct inode *inode = ctx->dentry->d_inode;
size_t rsize = NFS_SERVER(inode)->rsize;
- unsigned int rpages = nfs_max_pages(rsize);
unsigned int pgbase;
int result;
ssize_t started = 0;
get_dreq(dreq);
- pgbase = user_addr & ~PAGE_MASK;
do {
struct nfs_read_data *data;
size_t bytes;
+ pgbase = user_addr & ~PAGE_MASK;
+ bytes = min(rsize,count);
+
result = -ENOMEM;
- data = nfs_readdata_alloc(rpages);
+ data = nfs_readdata_alloc(pgbase + bytes);
if (unlikely(!data))
break;
- bytes = rsize;
- if (count < rsize)
- bytes = count;
-
- data->npages = nfs_direct_count_pages(user_addr, bytes);
down_read(¤t->mm->mmap_sem);
result = get_user_pages(current, current->mm, user_addr,
data->npages, 1, 0, data->pagevec, NULL);
data->task.tk_cookie = (unsigned long) inode;
- lock_kernel();
rpc_execute(&data->task);
- unlock_kernel();
dfprintk(VFS, "NFS: %5u initiated direct read call (req %s/%Ld, %zu bytes @ offset %Lu)\n",
data->task.tk_pid,
started += bytes;
user_addr += bytes;
pos += bytes;
+ /* FIXME: Remove this unnecessary math from final patch */
pgbase += bytes;
pgbase &= ~PAGE_MASK;
+ BUG_ON(pgbase != (user_addr & ~PAGE_MASK));
count -= bytes;
} while (count != 0);
dprintk("NFS: %5u initiated commit call\n", data->task.tk_pid);
- lock_kernel();
rpc_execute(&data->task);
- unlock_kernel();
}
static void nfs_direct_write_complete(struct nfs_direct_req *dreq, struct inode *inode)
if (dreq->commit_data != NULL)
nfs_commit_free(dreq->commit_data);
nfs_direct_free_writedata(dreq);
+ nfs_zap_mapping(inode, inode->i_mapping);
nfs_direct_complete(dreq);
}
}
static void nfs_alloc_commit_data(struct nfs_direct_req *dreq)
{
- dreq->commit_data = nfs_commit_alloc(0);
+ dreq->commit_data = nfs_commit_alloc();
if (dreq->commit_data != NULL)
dreq->commit_data->req = (struct nfs_page *) dreq;
}
{
nfs_end_data_update(inode);
nfs_direct_free_writedata(dreq);
+ nfs_zap_mapping(inode, inode->i_mapping);
nfs_direct_complete(dreq);
}
#endif
spin_lock(&dreq->lock);
- if (likely(status >= 0))
- dreq->count += data->res.count;
- else
- dreq->error = task->tk_status;
+ if (unlikely(status < 0)) {
+ dreq->error = status;
+ goto out_unlock;
+ }
+
+ dreq->count += data->res.count;
if (data->res.verf->committed != NFS_FILE_SYNC) {
switch (dreq->flags) {
}
}
}
-
+out_unlock:
spin_unlock(&dreq->lock);
}
struct nfs_open_context *ctx = dreq->ctx;
struct inode *inode = ctx->dentry->d_inode;
size_t wsize = NFS_SERVER(inode)->wsize;
- unsigned int wpages = nfs_max_pages(wsize);
unsigned int pgbase;
int result;
ssize_t started = 0;
get_dreq(dreq);
- pgbase = user_addr & ~PAGE_MASK;
do {
struct nfs_write_data *data;
size_t bytes;
+ pgbase = user_addr & ~PAGE_MASK;
+ bytes = min(wsize,count);
+
result = -ENOMEM;
- data = nfs_writedata_alloc(wpages);
+ data = nfs_writedata_alloc(pgbase + bytes);
if (unlikely(!data))
break;
- bytes = wsize;
- if (count < wsize)
- bytes = count;
-
- data->npages = nfs_direct_count_pages(user_addr, bytes);
down_read(¤t->mm->mmap_sem);
result = get_user_pages(current, current->mm, user_addr,
data->npages, 0, 0, data->pagevec, NULL);
data->task.tk_priority = RPC_PRIORITY_NORMAL;
data->task.tk_cookie = (unsigned long) inode;
- lock_kernel();
rpc_execute(&data->task);
- unlock_kernel();
dfprintk(VFS, "NFS: %5u initiated direct write call (req %s/%Ld, %zu bytes @ offset %Lu)\n",
data->task.tk_pid,
started += bytes;
user_addr += bytes;
pos += bytes;
+
+ /* FIXME: Remove this useless math from the final patch */
pgbase += bytes;
pgbase &= ~PAGE_MASK;
+ BUG_ON(pgbase != (user_addr & ~PAGE_MASK));
count -= bytes;
} while (count != 0);
/**
* nfs_file_direct_read - file direct read operation for NFS files
* @iocb: target I/O control block
- * @buf: user's buffer into which to read data
- * @count: number of bytes to read
+ * @iov: vector of user buffers into which to read data
+ * @nr_segs: size of iov vector
* @pos: byte offset in file where reading starts
*
* We use this function for direct reads instead of calling
* client must read the updated atime from the server back into its
* cache.
*/
-ssize_t nfs_file_direct_read(struct kiocb *iocb, char __user *buf, size_t count, loff_t pos)
+ssize_t nfs_file_direct_read(struct kiocb *iocb, const struct iovec *iov,
+ unsigned long nr_segs, loff_t pos)
{
ssize_t retval = -EINVAL;
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
+ /* XXX: temporary */
+ const char __user *buf = iov[0].iov_base;
+ size_t count = iov[0].iov_len;
dprintk("nfs: direct read(%s/%s, %lu@%Ld)\n",
file->f_dentry->d_parent->d_name.name,
file->f_dentry->d_name.name,
(unsigned long) count, (long long) pos);
+ if (nr_segs != 1)
+ return -EINVAL;
+
if (count < 0)
goto out;
retval = -EFAULT;
/**
* nfs_file_direct_write - file direct write operation for NFS files
* @iocb: target I/O control block
- * @buf: user's buffer from which to write data
- * @count: number of bytes to write
+ * @iov: vector of user buffers from which to write data
+ * @nr_segs: size of iov vector
* @pos: byte offset in file where writing starts
*
* We use this function for direct writes instead of calling
* Note that O_APPEND is not supported for NFS direct writes, as there
* is no atomic O_APPEND write facility in the NFS protocol.
*/
-ssize_t nfs_file_direct_write(struct kiocb *iocb, const char __user *buf, size_t count, loff_t pos)
+ssize_t nfs_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
+ unsigned long nr_segs, loff_t pos)
{
ssize_t retval;
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
+ /* XXX: temporary */
+ const char __user *buf = iov[0].iov_base;
+ size_t count = iov[0].iov_len;
dfprintk(VFS, "nfs: direct write(%s/%s, %lu@%Ld)\n",
file->f_dentry->d_parent->d_name.name,
file->f_dentry->d_name.name,
(unsigned long) count, (long long) pos);
+ if (nr_segs != 1)
+ return -EINVAL;
+
retval = generic_write_checks(file, &pos, &count, 0);
if (retval)
goto out;
retval = nfs_direct_write(iocb, (unsigned long) buf, count, pos);
- /*
- * XXX: nfs_end_data_update() already ensures this file's
- * cached data is subsequently invalidated. Do we really
- * need to call invalidate_inode_pages2() again here?
- *
- * For aio writes, this invalidation will almost certainly
- * occur before the writes complete. Kind of racey.
- */
- if (mapping->nrpages)
- invalidate_inode_pages2(mapping);
-
if (retval > 0)
iocb->ki_pos = pos + retval;
*/
void nfs_destroy_directcache(void)
{
- if (kmem_cache_destroy(nfs_direct_cachep))
- printk(KERN_INFO "nfs_direct_cache: not all structures were freed\n");
+ kmem_cache_destroy(nfs_direct_cachep);
}
projects / mv-sheeva.git / blobdiff