diff options
| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2007-07-22 17:09:05 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2007-10-09 17:15:08 -0400 |
| commit | 94387fb1aa16ee853d00f959373132a181b0196b (patch) | |
| tree | e41d802c5f6aa8f1d9077b6e15337e2d143098e6 /fs | |
| parent | bbf25010f1a6b761914430f5fca081ec8c7accd1 (diff) | |
NFS: Add the helper nfs_vm_page_mkwrite
This is needed in order to set up a proper nfs_page request for mmapped
files.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nfs/file.c | 35 |
1 files changed, 33 insertions, 2 deletions
diff --git a/fs/nfs/file.c b/fs/nfs/file.c index 579cf8a7d4a7..f2270fff4962 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -33,6 +33,7 @@ #include <asm/system.h> #include "delegation.h" +#include "internal.h" #include "iostat.h" #define NFSDBG_FACILITY NFSDBG_FILE @@ -55,6 +56,8 @@ static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl); static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl); static int nfs_setlease(struct file *file, long arg, struct file_lock **fl); +static struct vm_operations_struct nfs_file_vm_ops; + const struct file_operations nfs_file_operations = { .llseek = nfs_file_llseek, .read = do_sync_read, @@ -257,8 +260,11 @@ nfs_file_mmap(struct file * file, struct vm_area_struct * vma) dentry->d_parent->d_name.name, dentry->d_name.name); status = nfs_revalidate_mapping(inode, file->f_mapping); - if (!status) - status = generic_file_mmap(file, vma); + if (!status) { + vma->vm_ops = &nfs_file_vm_ops; + vma->vm_flags |= VM_CAN_NONLINEAR; + file_accessed(file); + } return status; } @@ -346,6 +352,31 @@ const struct address_space_operations nfs_file_aops = { .launder_page = nfs_launder_page, }; +static int nfs_vm_page_mkwrite(struct vm_area_struct *vma, struct page *page) +{ + struct file *filp = vma->vm_file; + unsigned pagelen; + int ret = -EINVAL; + + lock_page(page); + if (page->mapping != vma->vm_file->f_path.dentry->d_inode->i_mapping) + goto out_unlock; + pagelen = nfs_page_length(page); + if (pagelen == 0) + goto out_unlock; + ret = nfs_prepare_write(filp, page, 0, pagelen); + if (!ret) + ret = nfs_commit_write(filp, page, 0, pagelen); +out_unlock: + unlock_page(page); + return ret; +} + +static struct vm_operations_struct nfs_file_vm_ops = { + .fault = filemap_fault, + .page_mkwrite = nfs_vm_page_mkwrite, +}; + static ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov, unsigned long nr_segs, loff_t pos) { |