* nfs regular file handling functions
*/
+#include <linux/module.h>
#include <linux/time.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include "internal.h"
#include "iostat.h"
#include "fscache.h"
-#include "pnfs.h"
#define NFSDBG_FACILITY NFSDBG_FILE
static const struct vm_operations_struct nfs_file_vm_ops;
-const struct inode_operations nfs_file_inode_operations = {
- .permission = nfs_permission,
- .getattr = nfs_getattr,
- .setattr = nfs_setattr,
-};
-
-#ifdef CONFIG_NFS_V3
-const struct inode_operations nfs3_file_inode_operations = {
- .permission = nfs_permission,
- .getattr = nfs_getattr,
- .setattr = nfs_setattr,
- .listxattr = nfs3_listxattr,
- .getxattr = nfs3_getxattr,
- .setxattr = nfs3_setxattr,
- .removexattr = nfs3_removexattr,
-};
-#endif /* CONFIG_NFS_v3 */
-
/* Hack for future NFS swap support */
#ifndef IS_SWAPFILE
# define IS_SWAPFILE(inode) (0)
#endif
-static int nfs_check_flags(int flags)
+int nfs_check_flags(int flags)
{
if ((flags & (O_APPEND | O_DIRECT)) == (O_APPEND | O_DIRECT))
return -EINVAL;
return 0;
}
+EXPORT_SYMBOL_GPL(nfs_check_flags);
/*
* Open file
return res;
}
-static int
+int
nfs_file_release(struct inode *inode, struct file *filp)
{
dprintk("NFS: release(%s/%s)\n",
nfs_inc_stats(inode, NFSIOS_VFSRELEASE);
return nfs_release(inode, filp);
}
+EXPORT_SYMBOL_GPL(nfs_file_release);
/**
* nfs_revalidate_size - Revalidate the file size
return __nfs_revalidate_inode(server, inode);
}
-static loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin)
+loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin)
{
dprintk("NFS: llseek file(%s/%s, %lld, %d)\n",
filp->f_path.dentry->d_parent->d_name.name,
return generic_file_llseek(filp, offset, origin);
}
+EXPORT_SYMBOL_GPL(nfs_file_llseek);
/*
* Flush all dirty pages, and check for write errors.
*/
-static int
+int
nfs_file_flush(struct file *file, fl_owner_t id)
{
struct dentry *dentry = file->f_path.dentry;
* If we're holding a write delegation, then just start the i/o
* but don't wait for completion (or send a commit).
*/
- if (nfs_have_delegation(inode, FMODE_WRITE))
+ if (NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE))
return filemap_fdatawrite(file->f_mapping);
/* Flush writes to the server and return any errors */
return vfs_fsync(file, 0);
}
+EXPORT_SYMBOL_GPL(nfs_file_flush);
-static ssize_t
+ssize_t
nfs_file_read(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
{
ssize_t result;
if (iocb->ki_filp->f_flags & O_DIRECT)
- return nfs_file_direct_read(iocb, iov, nr_segs, pos);
+ return nfs_file_direct_read(iocb, iov, nr_segs, pos, true);
dprintk("NFS: read(%s/%s, %lu@%lu)\n",
dentry->d_parent->d_name.name, dentry->d_name.name,
}
return result;
}
+EXPORT_SYMBOL_GPL(nfs_file_read);
-static ssize_t
+ssize_t
nfs_file_splice_read(struct file *filp, loff_t *ppos,
struct pipe_inode_info *pipe, size_t count,
unsigned int flags)
}
return res;
}
+EXPORT_SYMBOL_GPL(nfs_file_splice_read);
-static int
+int
nfs_file_mmap(struct file * file, struct vm_area_struct * vma)
{
struct dentry *dentry = file->f_path.dentry;
}
return status;
}
+EXPORT_SYMBOL_GPL(nfs_file_mmap);
/*
* Flush any dirty pages for this process, and check for write errors.
* nfs_file_write() that a write error occurred, and hence cause it to
* fall back to doing a synchronous write.
*/
-static int
-nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
+int
+nfs_file_fsync_commit(struct file *file, loff_t start, loff_t end, int datasync)
{
struct dentry *dentry = file->f_path.dentry;
struct nfs_open_context *ctx = nfs_file_open_context(file);
dentry->d_parent->d_name.name, dentry->d_name.name,
datasync);
- ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
- mutex_lock(&inode->i_mutex);
-
nfs_inc_stats(inode, NFSIOS_VFSFSYNC);
have_error = test_and_clear_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags);
status = nfs_commit_inode(inode, FLUSH_SYNC);
ret = xchg(&ctx->error, 0);
if (!ret && status < 0)
ret = status;
- if (!ret && !datasync)
- /* application has asked for meta-data sync */
- ret = pnfs_layoutcommit_inode(inode, true);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(nfs_file_fsync_commit);
+
+static int
+nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
+{
+ int ret;
+ struct inode *inode = file->f_path.dentry->d_inode;
+
+ ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+ mutex_lock(&inode->i_mutex);
+ ret = nfs_file_fsync_commit(file, start, end, datasync);
mutex_unlock(&inode->i_mutex);
+
return ret;
}
if (offset != 0)
return;
/* Cancel any unstarted writes on this page */
- nfs_wb_page_cancel(page->mapping->host, page);
+ nfs_wb_page_cancel(page_file_mapping(page)->host, page);
nfs_fscache_invalidate_page(page, page->mapping->host);
}
dfprintk(PAGECACHE, "NFS: release_page(%p)\n", page);
- /* Only do I/O if gfp is a superset of GFP_KERNEL */
- if (mapping && (gfp & GFP_KERNEL) == GFP_KERNEL) {
+ /* Only do I/O if gfp is a superset of GFP_KERNEL, and we're not
+ * doing this memory reclaim for a fs-related allocation.
+ */
+ if (mapping && (gfp & GFP_KERNEL) == GFP_KERNEL &&
+ !(current->flags & PF_FSTRANS)) {
int how = FLUSH_SYNC;
/* Don't let kswapd deadlock waiting for OOM RPC calls */
*/
static int nfs_launder_page(struct page *page)
{
- struct inode *inode = page->mapping->host;
+ struct inode *inode = page_file_mapping(page)->host;
struct nfs_inode *nfsi = NFS_I(inode);
dfprintk(PAGECACHE, "NFS: launder_page(%ld, %llu)\n",
return nfs_wb_page(inode, page);
}
+#ifdef CONFIG_NFS_SWAP
+static int nfs_swap_activate(struct swap_info_struct *sis, struct file *file,
+ sector_t *span)
+{
+ *span = sis->pages;
+ return xs_swapper(NFS_CLIENT(file->f_mapping->host)->cl_xprt, 1);
+}
+
+static void nfs_swap_deactivate(struct file *file)
+{
+ xs_swapper(NFS_CLIENT(file->f_mapping->host)->cl_xprt, 0);
+}
+#endif
+
const struct address_space_operations nfs_file_aops = {
.readpage = nfs_readpage,
.readpages = nfs_readpages,
.migratepage = nfs_migrate_page,
.launder_page = nfs_launder_page,
.error_remove_page = generic_error_remove_page,
+#ifdef CONFIG_NFS_SWAP
+ .swap_activate = nfs_swap_activate,
+ .swap_deactivate = nfs_swap_deactivate,
+#endif
};
/*
nfs_fscache_wait_on_page_write(NFS_I(dentry->d_inode), page);
lock_page(page);
- mapping = page->mapping;
+ mapping = page_file_mapping(page);
if (mapping != dentry->d_inode->i_mapping)
goto out_unlock;
return 0;
}
-static ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov,
- unsigned long nr_segs, loff_t pos)
+ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov,
+ unsigned long nr_segs, loff_t pos)
{
struct dentry * dentry = iocb->ki_filp->f_path.dentry;
struct inode * inode = dentry->d_inode;
size_t count = iov_length(iov, nr_segs);
if (iocb->ki_filp->f_flags & O_DIRECT)
- return nfs_file_direct_write(iocb, iov, nr_segs, pos);
+ return nfs_file_direct_write(iocb, iov, nr_segs, pos, true);
dprintk("NFS: write(%s/%s, %lu@%Ld)\n",
dentry->d_parent->d_name.name, dentry->d_name.name,
printk(KERN_INFO "NFS: attempt to write to active swap file!\n");
goto out;
}
+EXPORT_SYMBOL_GPL(nfs_file_write);
-static ssize_t nfs_file_splice_write(struct pipe_inode_info *pipe,
- struct file *filp, loff_t *ppos,
- size_t count, unsigned int flags)
+ssize_t nfs_file_splice_write(struct pipe_inode_info *pipe,
+ struct file *filp, loff_t *ppos,
+ size_t count, unsigned int flags)
{
struct dentry *dentry = filp->f_path.dentry;
struct inode *inode = dentry->d_inode;
nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, written);
return ret;
}
+EXPORT_SYMBOL_GPL(nfs_file_splice_write);
static int
do_getlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
}
fl->fl_type = saved_type;
- if (nfs_have_delegation(inode, FMODE_READ))
+ if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
goto out_noconflict;
if (is_local)
* This makes locking act as a cache coherency point.
*/
nfs_sync_mapping(filp->f_mapping);
- if (!nfs_have_delegation(inode, FMODE_READ)) {
+ if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) {
if (is_time_granular(&NFS_SERVER(inode)->time_delta))
__nfs_revalidate_inode(NFS_SERVER(inode), inode);
else
/*
* Lock a (portion of) a file
*/
-static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl)
+int nfs_lock(struct file *filp, int cmd, struct file_lock *fl)
{
struct inode *inode = filp->f_mapping->host;
int ret = -ENOLCK;
out_err:
return ret;
}
+EXPORT_SYMBOL_GPL(nfs_lock);
/*
* Lock a (portion of) a file
*/
-static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl)
+int nfs_flock(struct file *filp, int cmd, struct file_lock *fl)
{
struct inode *inode = filp->f_mapping->host;
int is_local = 0;
if (!(fl->fl_flags & FL_FLOCK))
return -ENOLCK;
+ /*
+ * The NFSv4 protocol doesn't support LOCK_MAND, which is not part of
+ * any standard. In principle we might be able to support LOCK_MAND
+ * on NFSv2/3 since NLMv3/4 support DOS share modes, but for now the
+ * NFS code is not set up for it.
+ */
+ if (fl->fl_type & LOCK_MAND)
+ return -EINVAL;
+
if (NFS_SERVER(inode)->flags & NFS_MOUNT_LOCAL_FLOCK)
is_local = 1;
return do_unlk(filp, cmd, fl, is_local);
return do_setlk(filp, cmd, fl, is_local);
}
+EXPORT_SYMBOL_GPL(nfs_flock);
/*
* There is no protocol support for leases, so we have no way to implement
* them correctly in the face of opens by other clients.
*/
-static int nfs_setlease(struct file *file, long arg, struct file_lock **fl)
+int nfs_setlease(struct file *file, long arg, struct file_lock **fl)
{
dprintk("NFS: setlease(%s/%s, arg=%ld)\n",
file->f_path.dentry->d_parent->d_name.name,
file->f_path.dentry->d_name.name, arg);
return -EINVAL;
}
+EXPORT_SYMBOL_GPL(nfs_setlease);
const struct file_operations nfs_file_operations = {
.llseek = nfs_file_llseek,
.check_flags = nfs_check_flags,
.setlease = nfs_setlease,
};
-
-#ifdef CONFIG_NFS_V4
-static int
-nfs4_file_open(struct inode *inode, struct file *filp)
-{
- struct nfs_open_context *ctx;
- struct dentry *dentry = filp->f_path.dentry;
- struct dentry *parent = NULL;
- struct inode *dir;
- unsigned openflags = filp->f_flags;
- struct iattr attr;
- int err;
-
- BUG_ON(inode != dentry->d_inode);
- /*
- * If no cached dentry exists or if it's negative, NFSv4 handled the
- * opens in ->lookup() or ->create().
- *
- * We only get this far for a cached positive dentry. We skipped
- * revalidation, so handle it here by dropping the dentry and returning
- * -EOPENSTALE. The VFS will retry the lookup/create/open.
- */
-
- dprintk("NFS: open file(%s/%s)\n",
- dentry->d_parent->d_name.name,
- dentry->d_name.name);
-
- if ((openflags & O_ACCMODE) == 3)
- openflags--;
-
- /* We can't create new files here */
- openflags &= ~(O_CREAT|O_EXCL);
-
- parent = dget_parent(dentry);
- dir = parent->d_inode;
-
- ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode);
- err = PTR_ERR(ctx);
- if (IS_ERR(ctx))
- goto out;
-
- attr.ia_valid = ATTR_OPEN;
- if (openflags & O_TRUNC) {
- attr.ia_valid |= ATTR_SIZE;
- attr.ia_size = 0;
- nfs_wb_all(inode);
- }
-
- inode = NFS_PROTO(dir)->open_context(dir, ctx, openflags, &attr);
- if (IS_ERR(inode)) {
- err = PTR_ERR(inode);
- switch (err) {
- case -EPERM:
- case -EACCES:
- case -EDQUOT:
- case -ENOSPC:
- case -EROFS:
- goto out_put_ctx;
- default:
- goto out_drop;
- }
- }
- iput(inode);
- if (inode != dentry->d_inode)
- goto out_drop;
-
- nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
- nfs_file_set_open_context(filp, ctx);
- err = 0;
-
-out_put_ctx:
- put_nfs_open_context(ctx);
-out:
- dput(parent);
- return err;
-
-out_drop:
- d_drop(dentry);
- err = -EOPENSTALE;
- goto out_put_ctx;
-}
-
-const struct file_operations nfs4_file_operations = {
- .llseek = nfs_file_llseek,
- .read = do_sync_read,
- .write = do_sync_write,
- .aio_read = nfs_file_read,
- .aio_write = nfs_file_write,
- .mmap = nfs_file_mmap,
- .open = nfs4_file_open,
- .flush = nfs_file_flush,
- .release = nfs_file_release,
- .fsync = nfs_file_fsync,
- .lock = nfs_lock,
- .flock = nfs_flock,
- .splice_read = nfs_file_splice_read,
- .splice_write = nfs_file_splice_write,
- .check_flags = nfs_check_flags,
- .setlease = nfs_setlease,
-};
-#endif /* CONFIG_NFS_V4 */
+EXPORT_SYMBOL_GPL(nfs_file_operations);
git.openpandora.org / pandora-kernel.git / blobdiff