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authorTrond Myklebust <Trond.Myklebust@netapp.com>2009-04-01 13:28:15 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2009-04-01 13:28:15 -0400
commitcc85906110e26fe8537c3bdbc08a74ae8110030b (patch)
tree891813098ede3dba4d5ff3b83b1f7b491367ad2f /fs/nfs/file.c
parentc09bca786ff941ed17c5f381c4eca5b106808c51 (diff)
parentc69da774b28e01e062e0a3aba7509f2dcfd2a11a (diff)
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Merge branch 'devel' into for-linus
Diffstat (limited to 'fs/nfs/file.c')
-rw-r--r--fs/nfs/file.c32
1 files changed, 16 insertions, 16 deletions
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index cec7939..0abf3f3 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -64,11 +64,7 @@ const struct file_operations nfs_file_operations = {
.write = do_sync_write,
.aio_read = nfs_file_read,
.aio_write = nfs_file_write,
-#ifdef CONFIG_MMU
.mmap = nfs_file_mmap,
-#else
- .mmap = generic_file_mmap,
-#endif
.open = nfs_file_open,
.flush = nfs_file_flush,
.release = nfs_file_release,
@@ -141,9 +137,6 @@ nfs_file_release(struct inode *inode, struct file *filp)
dentry->d_parent->d_name.name,
dentry->d_name.name);
- /* Ensure that dirty pages are flushed out with the right creds */
- if (filp->f_mode & FMODE_WRITE)
- nfs_wb_all(dentry->d_inode);
nfs_inc_stats(inode, NFSIOS_VFSRELEASE);
return nfs_release(inode, filp);
}
@@ -235,7 +228,6 @@ nfs_file_flush(struct file *file, fl_owner_t id)
struct nfs_open_context *ctx = nfs_file_open_context(file);
struct dentry *dentry = file->f_path.dentry;
struct inode *inode = dentry->d_inode;
- int status;
dprintk("NFS: flush(%s/%s)\n",
dentry->d_parent->d_name.name,
@@ -245,11 +237,8 @@ nfs_file_flush(struct file *file, fl_owner_t id)
return 0;
nfs_inc_stats(inode, NFSIOS_VFSFLUSH);
- /* Ensure that data+attribute caches are up to date after close() */
- status = nfs_do_fsync(ctx, inode);
- if (!status)
- nfs_revalidate_inode(NFS_SERVER(inode), inode);
- return status;
+ /* Flush writes to the server and return any errors */
+ return nfs_do_fsync(ctx, inode);
}
static ssize_t
@@ -304,11 +293,13 @@ nfs_file_mmap(struct file * file, struct vm_area_struct * vma)
dprintk("NFS: mmap(%s/%s)\n",
dentry->d_parent->d_name.name, dentry->d_name.name);
- status = nfs_revalidate_mapping(inode, file->f_mapping);
+ /* Note: generic_file_mmap() returns ENOSYS on nommu systems
+ * so we call that before revalidating the mapping
+ */
+ status = generic_file_mmap(file, vma);
if (!status) {
vma->vm_ops = &nfs_file_vm_ops;
- vma->vm_flags |= VM_CAN_NONLINEAR;
- file_accessed(file);
+ status = nfs_revalidate_mapping(inode, file->f_mapping);
}
return status;
}
@@ -354,6 +345,15 @@ static int nfs_write_begin(struct file *file, struct address_space *mapping,
file->f_path.dentry->d_name.name,
mapping->host->i_ino, len, (long long) pos);
+ /*
+ * Prevent starvation issues if someone is doing a consistency
+ * sync-to-disk
+ */
+ ret = wait_on_bit(&NFS_I(mapping->host)->flags, NFS_INO_FLUSHING,
+ nfs_wait_bit_killable, TASK_KILLABLE);
+ if (ret)
+ return ret;
+
page = grab_cache_page_write_begin(mapping, index, flags);
if (!page)
return -ENOMEM;