#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/sched.h>
+#include <linux/module.h>
static const struct file_operations fuse_direct_io_file_operations;
-static int fuse_send_open(struct inode *inode, struct file *file, int isdir,
- struct fuse_open_out *outargp)
+static int fuse_send_open(struct fuse_conn *fc, u64 nodeid, struct file *file,
+ int opcode, struct fuse_open_out *outargp)
{
- struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_open_in inarg;
struct fuse_req *req;
int err;
inarg.flags = file->f_flags & ~(O_CREAT | O_EXCL | O_NOCTTY);
if (!fc->atomic_o_trunc)
inarg.flags &= ~O_TRUNC;
- req->in.h.opcode = isdir ? FUSE_OPENDIR : FUSE_OPEN;
- req->in.h.nodeid = get_node_id(inode);
+ req->in.h.opcode = opcode;
+ req->in.h.nodeid = nodeid;
req->in.numargs = 1;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
kfree(ff);
}
-static struct fuse_file *fuse_file_get(struct fuse_file *ff)
+struct fuse_file *fuse_file_get(struct fuse_file *ff)
{
atomic_inc(&ff->count);
return ff;
{
if (atomic_dec_and_test(&ff->count)) {
struct fuse_req *req = ff->reserved_req;
- struct inode *inode = req->misc.release.path.dentry->d_inode;
- struct fuse_conn *fc = get_fuse_conn(inode);
+
req->end = fuse_release_end;
- fuse_request_send_background(fc, req);
+ fuse_request_send_background(ff->fc, req);
kfree(ff);
}
}
-void fuse_finish_open(struct inode *inode, struct file *file,
- struct fuse_file *ff, struct fuse_open_out *outarg)
+int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file,
+ bool isdir)
{
- if (outarg->open_flags & FOPEN_DIRECT_IO)
+ struct fuse_open_out outarg;
+ struct fuse_file *ff;
+ int err;
+ int opcode = isdir ? FUSE_OPENDIR : FUSE_OPEN;
+
+ ff = fuse_file_alloc(fc);
+ if (!ff)
+ return -ENOMEM;
+
+ err = fuse_send_open(fc, nodeid, file, opcode, &outarg);
+ if (err) {
+ fuse_file_free(ff);
+ return err;
+ }
+
+ if (isdir)
+ outarg.open_flags &= ~FOPEN_DIRECT_IO;
+
+ ff->fh = outarg.fh;
+ ff->nodeid = nodeid;
+ ff->open_flags = outarg.open_flags;
+ file->private_data = fuse_file_get(ff);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fuse_do_open);
+
+void fuse_finish_open(struct inode *inode, struct file *file)
+{
+ struct fuse_file *ff = file->private_data;
+
+ if (ff->open_flags & FOPEN_DIRECT_IO)
file->f_op = &fuse_direct_io_file_operations;
- if (!(outarg->open_flags & FOPEN_KEEP_CACHE))
+ if (!(ff->open_flags & FOPEN_KEEP_CACHE))
invalidate_inode_pages2(inode->i_mapping);
- if (outarg->open_flags & FOPEN_NONSEEKABLE)
+ if (ff->open_flags & FOPEN_NONSEEKABLE)
nonseekable_open(inode, file);
- ff->fh = outarg->fh;
- ff->nodeid = get_node_id(inode);
- file->private_data = fuse_file_get(ff);
}
-int fuse_open_common(struct inode *inode, struct file *file, int isdir)
+int fuse_open_common(struct inode *inode, struct file *file, bool isdir)
{
struct fuse_conn *fc = get_fuse_conn(inode);
- struct fuse_open_out outarg;
- struct fuse_file *ff;
int err;
/* VFS checks this, but only _after_ ->open() */
if (err)
return err;
- ff = fuse_file_alloc(fc);
- if (!ff)
- return -ENOMEM;
-
- err = fuse_send_open(inode, file, isdir, &outarg);
+ err = fuse_do_open(fc, get_node_id(inode), file, isdir);
if (err)
- fuse_file_free(ff);
- else {
- if (isdir)
- outarg.open_flags &= ~FOPEN_DIRECT_IO;
- fuse_finish_open(inode, file, ff, &outarg);
- }
+ return err;
- return err;
+ fuse_finish_open(inode, file);
+
+ return 0;
}
-void fuse_release_fill(struct fuse_file *ff, u64 nodeid, int flags, int opcode)
+static void fuse_prepare_release(struct fuse_file *ff, int flags, int opcode)
{
+ struct fuse_conn *fc = ff->fc;
struct fuse_req *req = ff->reserved_req;
struct fuse_release_in *inarg = &req->misc.release.in;
+ spin_lock(&fc->lock);
+ list_del(&ff->write_entry);
+ if (!RB_EMPTY_NODE(&ff->polled_node))
+ rb_erase(&ff->polled_node, &fc->polled_files);
+ spin_unlock(&fc->lock);
+
+ wake_up_interruptible_sync(&ff->poll_wait);
+
inarg->fh = ff->fh;
inarg->flags = flags;
req->in.h.opcode = opcode;
- req->in.h.nodeid = nodeid;
+ req->in.h.nodeid = ff->nodeid;
req->in.numargs = 1;
req->in.args[0].size = sizeof(struct fuse_release_in);
req->in.args[0].value = inarg;
}
-int fuse_release_common(struct inode *inode, struct file *file, int isdir)
+void fuse_release_common(struct file *file, int opcode)
{
- struct fuse_conn *fc;
struct fuse_file *ff;
struct fuse_req *req;
ff = file->private_data;
if (unlikely(!ff))
- return 0; /* return value is ignored by VFS */
+ return;
- fc = get_fuse_conn(inode);
req = ff->reserved_req;
-
- fuse_release_fill(ff, get_node_id(inode), file->f_flags,
- isdir ? FUSE_RELEASEDIR : FUSE_RELEASE);
+ fuse_prepare_release(ff, file->f_flags, opcode);
/* Hold vfsmount and dentry until release is finished */
path_get(&file->f_path);
req->misc.release.path = file->f_path;
- spin_lock(&fc->lock);
- list_del(&ff->write_entry);
- if (!RB_EMPTY_NODE(&ff->polled_node))
- rb_erase(&ff->polled_node, &fc->polled_files);
- spin_unlock(&fc->lock);
-
- wake_up_interruptible_sync(&ff->poll_wait);
/*
* Normally this will send the RELEASE request, however if
* some asynchronous READ or WRITE requests are outstanding,
* the sending will be delayed.
*/
fuse_file_put(ff);
- return 0;
}
static int fuse_open(struct inode *inode, struct file *file)
{
- return fuse_open_common(inode, file, 0);
+ return fuse_open_common(inode, file, false);
}
static int fuse_release(struct inode *inode, struct file *file)
{
- return fuse_release_common(inode, file, 0);
+ fuse_release_common(file, FUSE_RELEASE);
+
+ /* return value is ignored by VFS */
+ return 0;
+}
+
+void fuse_sync_release(struct fuse_file *ff, int flags)
+{
+ WARN_ON(atomic_read(&ff->count) > 1);
+ fuse_prepare_release(ff, flags, FUSE_RELEASE);
+ ff->reserved_req->force = 1;
+ fuse_request_send(ff->fc, ff->reserved_req);
+ fuse_put_request(ff->fc, ff->reserved_req);
+ kfree(ff);
}
+EXPORT_SYMBOL_GPL(fuse_sync_release);
/*
* Scramble the ID space with XTEA, so that the value of the files_struct
return 0;
}
-static ssize_t fuse_direct_io(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos, int write)
+ssize_t fuse_direct_io(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos, int write)
{
struct fuse_file *ff = file->private_data;
struct fuse_conn *fc = ff->fc;
return res;
}
+EXPORT_SYMBOL_GPL(fuse_direct_io);
static ssize_t fuse_direct_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
* limits ioctl data transfers to well-formed ioctls and is the forced
* behavior for all FUSE servers.
*/
-static long fuse_file_do_ioctl(struct file *file, unsigned int cmd,
- unsigned long arg, unsigned int flags)
+long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg,
+ unsigned int flags)
{
- struct inode *inode = file->f_dentry->d_inode;
struct fuse_file *ff = file->private_data;
- struct fuse_conn *fc = get_fuse_conn(inode);
+ struct fuse_conn *fc = ff->fc;
struct fuse_ioctl_in inarg = {
.fh = ff->fh,
.cmd = cmd,
/* assume all the iovs returned by client always fits in a page */
BUILD_BUG_ON(sizeof(struct iovec) * FUSE_IOCTL_MAX_IOV > PAGE_SIZE);
- if (!fuse_allow_task(fc, current))
- return -EACCES;
-
- err = -EIO;
- if (is_bad_inode(inode))
- goto out;
-
err = -ENOMEM;
pages = kzalloc(sizeof(pages[0]) * FUSE_MAX_PAGES_PER_REQ, GFP_KERNEL);
iov_page = alloc_page(GFP_KERNEL);
/* okay, let's send it to the client */
req->in.h.opcode = FUSE_IOCTL;
- req->in.h.nodeid = get_node_id(inode);
+ req->in.h.nodeid = ff->nodeid;
req->in.numargs = 1;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
return err ? err : outarg.result;
}
+EXPORT_SYMBOL_GPL(fuse_do_ioctl);
+
+static long fuse_file_ioctl_common(struct file *file, unsigned int cmd,
+ unsigned long arg, unsigned int flags)
+{
+ struct inode *inode = file->f_dentry->d_inode;
+ struct fuse_conn *fc = get_fuse_conn(inode);
+
+ if (!fuse_allow_task(fc, current))
+ return -EACCES;
+
+ if (is_bad_inode(inode))
+ return -EIO;
+
+ return fuse_do_ioctl(file, cmd, arg, flags);
+}
static long fuse_file_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
- return fuse_file_do_ioctl(file, cmd, arg, 0);
+ return fuse_file_ioctl_common(file, cmd, arg, 0);
}
static long fuse_file_compat_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
- return fuse_file_do_ioctl(file, cmd, arg, FUSE_IOCTL_COMPAT);
+ return fuse_file_ioctl_common(file, cmd, arg, FUSE_IOCTL_COMPAT);
}
/*
spin_unlock(&fc->lock);
}
-static unsigned fuse_file_poll(struct file *file, poll_table *wait)
+unsigned fuse_file_poll(struct file *file, poll_table *wait)
{
- struct inode *inode = file->f_dentry->d_inode;
struct fuse_file *ff = file->private_data;
- struct fuse_conn *fc = get_fuse_conn(inode);
+ struct fuse_conn *fc = ff->fc;
struct fuse_poll_in inarg = { .fh = ff->fh, .kh = ff->kh };
struct fuse_poll_out outarg;
struct fuse_req *req;
return PTR_ERR(req);
req->in.h.opcode = FUSE_POLL;
- req->in.h.nodeid = get_node_id(inode);
+ req->in.h.nodeid = ff->nodeid;
req->in.numargs = 1;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
}
return POLLERR;
}
+EXPORT_SYMBOL_GPL(fuse_file_poll);
/*
* This is called from fuse_handle_notify() on FUSE_NOTIFY_POLL and
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff