Make lifetime of 'struct fuse_file' independent from 'struct file' by adding a
reference counter and destructor.
This will enable asynchronous page writeback, where it cannot be guaranteed,
that the file is not released while a request with this file handle is being
served.
The actual RELEASE request is only sent when there are no more references to
the fuse_file.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
spin_unlock(&fc->lock);
dput(req->dentry);
mntput(req->vfsmount);
spin_unlock(&fc->lock);
dput(req->dentry);
mntput(req->vfsmount);
- if (req->file)
- fput(req->file);
wake_up(&req->waitq);
if (end)
end(fc, req);
wake_up(&req->waitq);
if (end)
end(fc, req);
static void fuse_sync_release(struct fuse_conn *fc, struct fuse_file *ff,
u64 nodeid, int flags)
{
static void fuse_sync_release(struct fuse_conn *fc, struct fuse_file *ff,
u64 nodeid, int flags)
{
- struct fuse_req *req;
-
- req = fuse_release_fill(ff, nodeid, flags, FUSE_RELEASE);
- req->force = 1;
- request_send(fc, req);
- fuse_put_request(fc, req);
+ fuse_release_fill(ff, nodeid, flags, FUSE_RELEASE);
+ ff->reserved_req->force = 1;
+ request_send(fc, ff->reserved_req);
+ fuse_put_request(fc, ff->reserved_req);
+ kfree(ff);
struct page *page;
struct inode *inode = file->f_path.dentry->d_inode;
struct fuse_conn *fc = get_fuse_conn(inode);
struct page *page;
struct inode *inode = file->f_path.dentry->d_inode;
struct fuse_conn *fc = get_fuse_conn(inode);
+ struct fuse_file *ff = file->private_data;
struct fuse_req *req;
if (is_bad_inode(inode))
struct fuse_req *req;
if (is_bad_inode(inode))
}
req->num_pages = 1;
req->pages[0] = page;
}
req->num_pages = 1;
req->pages[0] = page;
- fuse_read_fill(req, file, inode, file->f_pos, PAGE_SIZE, FUSE_READDIR);
+ fuse_read_fill(req, ff, inode, file->f_pos, PAGE_SIZE, FUSE_READDIR);
request_send(fc, req);
nbytes = req->out.args[0].size;
err = req->out.h.error;
request_send(fc, req);
nbytes = req->out.args[0].size;
err = req->out.h.error;
+ atomic_set(&ff->count, 0);
+static struct fuse_file *fuse_file_get(struct fuse_file *ff)
+{
+ atomic_inc(&ff->count);
+ return ff;
+}
+
+static void fuse_file_put(struct fuse_file *ff)
+{
+ if (atomic_dec_and_test(&ff->count)) {
+ struct fuse_req *req = ff->reserved_req;
+ struct fuse_conn *fc = get_fuse_conn(req->dentry->d_inode);
+ request_send_background(fc, req);
+ kfree(ff);
+ }
+}
+
void fuse_finish_open(struct inode *inode, struct file *file,
struct fuse_file *ff, struct fuse_open_out *outarg)
{
void fuse_finish_open(struct inode *inode, struct file *file,
struct fuse_file *ff, struct fuse_open_out *outarg)
{
if (!(outarg->open_flags & FOPEN_KEEP_CACHE))
invalidate_mapping_pages(inode->i_mapping, 0, -1);
ff->fh = outarg->fh;
if (!(outarg->open_flags & FOPEN_KEEP_CACHE))
invalidate_mapping_pages(inode->i_mapping, 0, -1);
ff->fh = outarg->fh;
- file->private_data = ff;
+ 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, int isdir)
-struct fuse_req *fuse_release_fill(struct fuse_file *ff, u64 nodeid, int flags,
- int opcode)
+void fuse_release_fill(struct fuse_file *ff, u64 nodeid, int flags, int opcode)
{
struct fuse_req *req = ff->reserved_req;
struct fuse_release_in *inarg = &req->misc.release_in;
{
struct fuse_req *req = ff->reserved_req;
struct fuse_release_in *inarg = &req->misc.release_in;
req->in.numargs = 1;
req->in.args[0].size = sizeof(struct fuse_release_in);
req->in.args[0].value = inarg;
req->in.numargs = 1;
req->in.args[0].size = sizeof(struct fuse_release_in);
req->in.args[0].value = inarg;
- kfree(ff);
-
- return req;
}
int fuse_release_common(struct inode *inode, struct file *file, int isdir)
{
struct fuse_file *ff = file->private_data;
if (ff) {
}
int fuse_release_common(struct inode *inode, struct file *file, int isdir)
{
struct fuse_file *ff = file->private_data;
if (ff) {
- struct fuse_conn *fc = get_fuse_conn(inode);
- struct fuse_req *req;
-
- req = fuse_release_fill(ff, get_node_id(inode), file->f_flags,
- isdir ? FUSE_RELEASEDIR : FUSE_RELEASE);
+ fuse_release_fill(ff, get_node_id(inode), file->f_flags,
+ isdir ? FUSE_RELEASEDIR : FUSE_RELEASE);
/* Hold vfsmount and dentry until release is finished */
/* Hold vfsmount and dentry until release is finished */
- req->vfsmount = mntget(file->f_path.mnt);
- req->dentry = dget(file->f_path.dentry);
- request_send_background(fc, req);
+ ff->reserved_req->vfsmount = mntget(file->f_path.mnt);
+ ff->reserved_req->dentry = dget(file->f_path.dentry);
+ /*
+ * 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 value is ignored by VFS */
}
/* Return value is ignored by VFS */
return fuse_fsync_common(file, de, datasync, 0);
}
return fuse_fsync_common(file, de, datasync, 0);
}
-void fuse_read_fill(struct fuse_req *req, struct file *file,
+void fuse_read_fill(struct fuse_req *req, struct fuse_file *ff,
struct inode *inode, loff_t pos, size_t count, int opcode)
{
struct inode *inode, loff_t pos, size_t count, int opcode)
{
- struct fuse_file *ff = file->private_data;
struct fuse_read_in *inarg = &req->misc.read_in;
inarg->fh = ff->fh;
struct fuse_read_in *inarg = &req->misc.read_in;
inarg->fh = ff->fh;
struct inode *inode, loff_t pos, size_t count)
{
struct fuse_conn *fc = get_fuse_conn(inode);
struct inode *inode, loff_t pos, size_t count)
{
struct fuse_conn *fc = get_fuse_conn(inode);
- fuse_read_fill(req, file, inode, pos, count, FUSE_READ);
+ struct fuse_file *ff = file->private_data;
+ fuse_read_fill(req, ff, inode, pos, count, FUSE_READ);
request_send(fc, req);
return req->out.args[0].size;
}
request_send(fc, req);
return req->out.args[0].size;
}
SetPageError(page);
unlock_page(page);
}
SetPageError(page);
unlock_page(page);
}
+ if (req->ff)
+ fuse_file_put(req->ff);
fuse_put_request(fc, req);
}
fuse_put_request(fc, req);
}
-static void fuse_send_readpages(struct fuse_req *req, struct file *file,
+static void fuse_send_readpages(struct fuse_req *req, struct fuse_file *ff,
struct inode *inode)
{
struct fuse_conn *fc = get_fuse_conn(inode);
loff_t pos = page_offset(req->pages[0]);
size_t count = req->num_pages << PAGE_CACHE_SHIFT;
req->out.page_zeroing = 1;
struct inode *inode)
{
struct fuse_conn *fc = get_fuse_conn(inode);
loff_t pos = page_offset(req->pages[0]);
size_t count = req->num_pages << PAGE_CACHE_SHIFT;
req->out.page_zeroing = 1;
- fuse_read_fill(req, file, inode, pos, count, FUSE_READ);
+ fuse_read_fill(req, ff, inode, pos, count, FUSE_READ);
- get_file(file);
- req->file = file;
+ req->ff = fuse_file_get(ff);
req->end = fuse_readpages_end;
request_send_background(fc, req);
} else {
req->end = fuse_readpages_end;
request_send_background(fc, req);
} else {
-struct fuse_readpages_data {
struct inode *inode;
};
static int fuse_readpages_fill(void *_data, struct page *page)
{
struct inode *inode;
};
static int fuse_readpages_fill(void *_data, struct page *page)
{
- struct fuse_readpages_data *data = _data;
+ struct fuse_fill_data *data = _data;
struct fuse_req *req = data->req;
struct inode *inode = data->inode;
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_req *req = data->req;
struct inode *inode = data->inode;
struct fuse_conn *fc = get_fuse_conn(inode);
(req->num_pages == FUSE_MAX_PAGES_PER_REQ ||
(req->num_pages + 1) * PAGE_CACHE_SIZE > fc->max_read ||
req->pages[req->num_pages - 1]->index + 1 != page->index)) {
(req->num_pages == FUSE_MAX_PAGES_PER_REQ ||
(req->num_pages + 1) * PAGE_CACHE_SIZE > fc->max_read ||
req->pages[req->num_pages - 1]->index + 1 != page->index)) {
- fuse_send_readpages(req, data->file, inode);
+ fuse_send_readpages(req, data->ff, inode);
data->req = req = fuse_get_req(fc);
if (IS_ERR(req)) {
unlock_page(page);
data->req = req = fuse_get_req(fc);
if (IS_ERR(req)) {
unlock_page(page);
{
struct inode *inode = mapping->host;
struct fuse_conn *fc = get_fuse_conn(inode);
{
struct inode *inode = mapping->host;
struct fuse_conn *fc = get_fuse_conn(inode);
- struct fuse_readpages_data data;
+ struct fuse_fill_data data;
int err;
err = -EIO;
if (is_bad_inode(inode))
goto out;
int err;
err = -EIO;
if (is_bad_inode(inode))
goto out;
+ data.ff = file->private_data;
data.inode = inode;
data.req = fuse_get_req(fc);
err = PTR_ERR(data.req);
data.inode = inode;
data.req = fuse_get_req(fc);
err = PTR_ERR(data.req);
err = read_cache_pages(mapping, pages, fuse_readpages_fill, &data);
if (!err) {
if (data.req->num_pages)
err = read_cache_pages(mapping, pages, fuse_readpages_fill, &data);
if (!err) {
if (data.req->num_pages)
- fuse_send_readpages(data.req, file, inode);
+ fuse_send_readpages(data.req, data.ff, inode);
else
fuse_put_request(fc, data.req);
}
else
fuse_put_request(fc, data.req);
}
/** File handle used by userspace */
u64 fh;
/** File handle used by userspace */
u64 fh;
+
+ /** Refcount */
+ atomic_t count;
};
/** One input argument of a request */
};
/** One input argument of a request */
unsigned page_offset;
/** File used in the request (or NULL) */
unsigned page_offset;
/** File used in the request (or NULL) */
/** vfsmount used in release */
struct vfsmount *vfsmount;
/** vfsmount used in release */
struct vfsmount *vfsmount;
/**
* Initialize READ or READDIR request
*/
/**
* Initialize READ or READDIR request
*/
-void fuse_read_fill(struct fuse_req *req, struct file *file,
+void fuse_read_fill(struct fuse_req *req, struct fuse_file *ff,
struct inode *inode, loff_t pos, size_t count, int opcode);
/**
struct inode *inode, loff_t pos, size_t count, int opcode);
/**
void fuse_finish_open(struct inode *inode, struct file *file,
struct fuse_file *ff, struct fuse_open_out *outarg);
void fuse_finish_open(struct inode *inode, struct file *file,
struct fuse_file *ff, struct fuse_open_out *outarg);
-/** */
-struct fuse_req *fuse_release_fill(struct fuse_file *ff, u64 nodeid, int flags,
- int opcode);
+/** Fill in ff->reserved_req with a RELEASE request */
+void fuse_release_fill(struct fuse_file *ff, u64 nodeid, int flags, int opcode);
+
/**
* Send RELEASE or RELEASEDIR request
*/
/**
* Send RELEASE or RELEASEDIR request
*/