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orangefs: implement writepage

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Now orangefs_inode_getattr fills from cache if an inode has dirty pages.

also if attr_valid and dirty pages and !flags, we spin on inode writeback
before returning if pages still dirty after: should it be other way

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
This commit is contained in:
Martin Brandenburg
2018-02-22 18:10:43 +00:00
zatwierdzone przez Mike Marshall
rodzic c453dcfc79
commit 85ac799cf9
3 zmienionych plików z 80 dodań i 68 usunięć
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75
fs/orangefs/file.c
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@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
/*
* (C) 2001 Clemson University and The University of Chicago
* Copyright 2018 Omnibond Systems, L.L.C.
*
* See COPYING in top-level directory.
*/
@@ -348,63 +349,11 @@ static ssize_t orangefs_file_read_iter(struct kiocb *iocb,
return generic_file_read_iter(iocb, iter);
}
static ssize_t orangefs_file_write_iter(struct kiocb *iocb, struct iov_iter *iter)
static ssize_t orangefs_file_write_iter(struct kiocb *iocb,
struct iov_iter *iter)
{
struct file *file = iocb->ki_filp;
loff_t pos;
ssize_t rc;
truncate_inode_pages(file->f_mapping, 0);
gossip_debug(GOSSIP_FILE_DEBUG, "orangefs_file_write_iter\n");
inode_lock(file->f_mapping->host);
/* Make sure generic_write_checks sees an up to date inode size. */
if (file->f_flags & O_APPEND) {
rc = orangefs_inode_getattr(file->f_mapping->host,
ORANGEFS_GETATTR_SIZE);
if (rc == -ESTALE)
rc = -EIO;
if (rc) {
gossip_err("%s: orangefs_inode_getattr failed, "
"rc:%zd:.\n", __func__, rc);
goto out;
}
}
rc = generic_write_checks(iocb, iter);
if (rc <= 0) {
gossip_err("%s: generic_write_checks failed, rc:%zd:.\n",
__func__, rc);
goto out;
}
/*
* if we are appending, generic_write_checks would have updated
* pos to the end of the file, so we will wait till now to set
* pos...
*/
pos = iocb->ki_pos;
rc = do_readv_writev(ORANGEFS_IO_WRITE,
file,
&pos,
iter);
if (rc < 0) {
gossip_err("%s: do_readv_writev failed, rc:%zd:.\n",
__func__, rc);
goto out;
}
iocb->ki_pos = pos;
orangefs_stats.writes++;
out:
inode_unlock(file->f_mapping->host);
return rc;
return generic_file_write_iter(iocb, iter);
}
/*
@@ -499,9 +448,6 @@ static int orangefs_file_mmap(struct file *file, struct vm_area_struct *vma)
(char *)file->f_path.dentry->d_name.name :
(char *)"Unknown"));
if ((vma->vm_flags & VM_SHARED) && (vma->vm_flags & VM_MAYWRITE))
return -EINVAL;
/* set the sequential readahead hint */
vma->vm_flags |= VM_SEQ_READ;
vma->vm_flags &= ~VM_RAND_READ;
@@ -541,8 +487,6 @@ static int orangefs_file_release(struct inode *inode, struct file *file)
gossip_debug(GOSSIP_INODE_DEBUG,
"flush_racache finished\n");
}
truncate_inode_pages(file_inode(file)->i_mapping,
0);
}
return 0;
}
@@ -560,6 +504,11 @@ static int orangefs_fsync(struct file *file,
ORANGEFS_I(file_inode(file));
struct orangefs_kernel_op_s *new_op = NULL;
ret = filemap_write_and_wait_range(file_inode(file)->i_mapping,
start, end);
if (ret < 0)
return ret;
new_op = op_alloc(ORANGEFS_VFS_OP_FSYNC);
if (!new_op)
return -ENOMEM;
@@ -641,6 +590,11 @@ static int orangefs_lock(struct file *filp, int cmd, struct file_lock *fl)
return rc;
}
static int orangefs_flush(struct file *file, fl_owner_t id)
{
return vfs_fsync(file, 0);
}
/** ORANGEFS implementation of VFS file operations */
const struct file_operations orangefs_file_operations = {
.llseek = orangefs_file_llseek,
@@ -650,6 +604,7 @@ const struct file_operations orangefs_file_operations = {
.unlocked_ioctl = orangefs_ioctl,
.mmap = orangefs_file_mmap,
.open = generic_file_open,
.flush = orangefs_flush,
.release = orangefs_file_release,
.fsync = orangefs_fsync,
};