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;
struct fuse_file *fuse_file_alloc(struct fuse_conn *fc)
{
struct fuse_file *ff;
+
ff = kmalloc(sizeof(struct fuse_file), GFP_KERNEL);
- if (ff) {
- ff->reserved_req = fuse_request_alloc();
- if (!ff->reserved_req) {
- kfree(ff);
- return NULL;
- } else {
- INIT_LIST_HEAD(&ff->write_entry);
- atomic_set(&ff->count, 0);
- spin_lock(&fc->lock);
- ff->kh = ++fc->khctr;
- spin_unlock(&fc->lock);
- }
- RB_CLEAR_NODE(&ff->polled_node);
- init_waitqueue_head(&ff->poll_wait);
+ if (unlikely(!ff))
+ return NULL;
+
+ ff->fc = fc;
+ ff->reserved_req = fuse_request_alloc();
+ if (unlikely(!ff->reserved_req)) {
+ kfree(ff);
+ return NULL;
}
+
+ INIT_LIST_HEAD(&ff->write_entry);
+ atomic_set(&ff->count, 0);
+ RB_CLEAR_NODE(&ff->polled_node);
+ init_waitqueue_head(&ff->poll_wait);
+
+ spin_lock(&fc->lock);
+ ff->kh = ++fc->khctr;
+ spin_unlock(&fc->lock);
+
return ff;
}
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;
static void fuse_release_end(struct fuse_conn *fc, struct fuse_req *req)
{
- dput(req->misc.release.dentry);
- mntput(req->misc.release.vfsmount);
+ path_put(&req->misc.release.path);
}
static void fuse_file_put(struct fuse_file *ff)
{
if (atomic_dec_and_test(&ff->count)) {
struct fuse_req *req = ff->reserved_req;
- struct inode *inode = req->misc.release.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)
+static 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;
+}
+
+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;
- 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_file *ff = file->private_data;
- if (ff) {
- struct fuse_conn *fc = get_fuse_conn(inode);
- struct fuse_req *req = ff->reserved_req;
-
- fuse_release_fill(ff, get_node_id(inode), file->f_flags,
- isdir ? FUSE_RELEASEDIR : FUSE_RELEASE);
+ struct fuse_file *ff;
+ struct fuse_req *req;
- /* Hold vfsmount and dentry until release is finished */
- req->misc.release.vfsmount = mntget(file->f_path.mnt);
- req->misc.release.dentry = dget(file->f_path.dentry);
+ ff = file->private_data;
+ if (unlikely(!ff))
+ return;
- 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);
+ req = ff->reserved_req;
+ fuse_prepare_release(ff, file->f_flags, opcode);
- 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);
- }
+ /* Hold vfsmount and dentry until release is finished */
+ path_get(&file->f_path);
+ req->misc.release.path = file->f_path;
- /* Return value is ignored by VFS */
- return 0;
+ /*
+ * 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);
}
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);
}
/*
return fuse_fsync_common(file, de, datasync, 0);
}
-void fuse_read_fill(struct fuse_req *req, struct file *file,
- struct inode *inode, loff_t pos, size_t count, int opcode)
+void fuse_read_fill(struct fuse_req *req, struct file *file, loff_t pos,
+ size_t count, int opcode)
{
struct fuse_read_in *inarg = &req->misc.read.in;
struct fuse_file *ff = file->private_data;
inarg->size = count;
inarg->flags = file->f_flags;
req->in.h.opcode = opcode;
- req->in.h.nodeid = get_node_id(inode);
+ req->in.h.nodeid = ff->nodeid;
req->in.numargs = 1;
req->in.args[0].size = sizeof(struct fuse_read_in);
req->in.args[0].value = inarg;
}
static size_t fuse_send_read(struct fuse_req *req, struct file *file,
- struct inode *inode, loff_t pos, size_t count,
- fl_owner_t owner)
+ loff_t pos, size_t count, fl_owner_t owner)
{
- struct fuse_conn *fc = get_fuse_conn(inode);
+ struct fuse_file *ff = file->private_data;
+ struct fuse_conn *fc = ff->fc;
- fuse_read_fill(req, file, inode, pos, count, FUSE_READ);
+ fuse_read_fill(req, file, pos, count, FUSE_READ);
if (owner != NULL) {
struct fuse_read_in *inarg = &req->misc.read.in;
req->out.argpages = 1;
req->num_pages = 1;
req->pages[0] = page;
- num_read = fuse_send_read(req, file, inode, pos, count, NULL);
+ num_read = fuse_send_read(req, file, pos, count, NULL);
err = req->out.h.error;
fuse_put_request(fc, req);
fuse_file_put(req->ff);
}
-static void fuse_send_readpages(struct fuse_req *req, struct file *file,
- struct inode *inode)
+static void fuse_send_readpages(struct fuse_req *req, struct file *file)
{
- struct fuse_conn *fc = get_fuse_conn(inode);
+ struct fuse_file *ff = file->private_data;
+ struct fuse_conn *fc = ff->fc;
loff_t pos = page_offset(req->pages[0]);
size_t count = req->num_pages << PAGE_CACHE_SHIFT;
req->out.argpages = 1;
req->out.page_zeroing = 1;
- fuse_read_fill(req, file, inode, pos, count, FUSE_READ);
+ fuse_read_fill(req, file, pos, count, FUSE_READ);
req->misc.read.attr_ver = fuse_get_attr_version(fc);
if (fc->async_read) {
- struct fuse_file *ff = file->private_data;
req->ff = fuse_file_get(ff);
req->end = fuse_readpages_end;
fuse_request_send_background(fc, req);
(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->file);
data->req = req = fuse_get_req(fc);
if (IS_ERR(req)) {
unlock_page(page);
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, file);
else
fuse_put_request(fc, data.req);
}
return generic_file_aio_read(iocb, iov, nr_segs, pos);
}
-static void fuse_write_fill(struct fuse_req *req, struct file *file,
- struct fuse_file *ff, struct inode *inode,
- loff_t pos, size_t count, int writepage)
+static void fuse_write_fill(struct fuse_req *req, struct fuse_file *ff,
+ loff_t pos, size_t count)
{
- struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_write_in *inarg = &req->misc.write.in;
struct fuse_write_out *outarg = &req->misc.write.out;
- memset(inarg, 0, sizeof(struct fuse_write_in));
inarg->fh = ff->fh;
inarg->offset = pos;
inarg->size = count;
- inarg->write_flags = writepage ? FUSE_WRITE_CACHE : 0;
- inarg->flags = file ? file->f_flags : 0;
req->in.h.opcode = FUSE_WRITE;
- req->in.h.nodeid = get_node_id(inode);
+ req->in.h.nodeid = ff->nodeid;
req->in.numargs = 2;
- if (fc->minor < 9)
+ if (ff->fc->minor < 9)
req->in.args[0].size = FUSE_COMPAT_WRITE_IN_SIZE;
else
req->in.args[0].size = sizeof(struct fuse_write_in);
}
static size_t fuse_send_write(struct fuse_req *req, struct file *file,
- struct inode *inode, loff_t pos, size_t count,
- fl_owner_t owner)
+ loff_t pos, size_t count, fl_owner_t owner)
{
- struct fuse_conn *fc = get_fuse_conn(inode);
- fuse_write_fill(req, file, file->private_data, inode, pos, count, 0);
+ struct fuse_file *ff = file->private_data;
+ struct fuse_conn *fc = ff->fc;
+ struct fuse_write_in *inarg = &req->misc.write.in;
+
+ fuse_write_fill(req, ff, pos, count);
+ inarg->flags = file->f_flags;
if (owner != NULL) {
- struct fuse_write_in *inarg = &req->misc.write.in;
inarg->write_flags |= FUSE_WRITE_LOCKOWNER;
inarg->lock_owner = fuse_lock_owner_id(fc, owner);
}
req->num_pages = 1;
req->pages[0] = page;
req->page_offset = offset;
- nres = fuse_send_write(req, file, inode, pos, count, NULL);
+ nres = fuse_send_write(req, file, pos, count, NULL);
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err && !nres)
for (i = 0; i < req->num_pages; i++)
fuse_wait_on_page_writeback(inode, req->pages[i]->index);
- res = fuse_send_write(req, file, inode, pos, count, NULL);
+ res = fuse_send_write(req, file, pos, count, NULL);
offset = req->page_offset;
count = res;
}
static int fuse_get_user_pages(struct fuse_req *req, const char __user *buf,
- unsigned *nbytesp, int write)
+ size_t *nbytesp, int write)
{
- unsigned nbytes = *nbytesp;
+ size_t nbytes = *nbytesp;
unsigned long user_addr = (unsigned long) buf;
unsigned offset = user_addr & ~PAGE_MASK;
int npages;
return 0;
}
- nbytes = min(nbytes, (unsigned) FUSE_MAX_PAGES_PER_REQ << PAGE_SHIFT);
+ nbytes = min_t(size_t, nbytes, FUSE_MAX_PAGES_PER_REQ << PAGE_SHIFT);
npages = (nbytes + offset + PAGE_SIZE - 1) >> PAGE_SHIFT;
npages = clamp(npages, 1, FUSE_MAX_PAGES_PER_REQ);
down_read(¤t->mm->mmap_sem);
static ssize_t fuse_direct_io(struct file *file, const char __user *buf,
size_t count, loff_t *ppos, int write)
{
- 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_conn *fc = ff->fc;
size_t nmax = write ? fc->max_write : fc->max_read;
loff_t pos = *ppos;
ssize_t res = 0;
struct fuse_req *req;
- if (is_bad_inode(inode))
- return -EIO;
-
req = fuse_get_req(fc);
if (IS_ERR(req))
return PTR_ERR(req);
while (count) {
size_t nres;
+ fl_owner_t owner = current->files;
size_t nbytes = min(count, nmax);
int err = fuse_get_user_pages(req, buf, &nbytes, write);
if (err) {
}
if (write)
- nres = fuse_send_write(req, file, inode, pos, nbytes,
- current->files);
+ nres = fuse_send_write(req, file, pos, nbytes, owner);
else
- nres = fuse_send_read(req, file, inode, pos, nbytes,
- current->files);
+ nres = fuse_send_read(req, file, pos, nbytes, owner);
+
fuse_release_user_pages(req, !write);
if (req->out.h.error) {
if (!res)
}
}
fuse_put_request(fc, req);
- if (res > 0) {
- if (write)
- fuse_write_update_size(inode, pos);
+ if (res > 0)
*ppos = pos;
- }
- fuse_invalidate_attr(inode);
return res;
}
static ssize_t fuse_direct_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
- return fuse_direct_io(file, buf, count, ppos, 0);
+ ssize_t res;
+ struct inode *inode = file->f_path.dentry->d_inode;
+
+ if (is_bad_inode(inode))
+ return -EIO;
+
+ res = fuse_direct_io(file, buf, count, ppos, 0);
+
+ fuse_invalidate_attr(inode);
+
+ return res;
}
static ssize_t fuse_direct_write(struct file *file, const char __user *buf,
{
struct inode *inode = file->f_path.dentry->d_inode;
ssize_t res;
+
+ if (is_bad_inode(inode))
+ return -EIO;
+
/* Don't allow parallel writes to the same file */
mutex_lock(&inode->i_mutex);
res = generic_write_checks(file, ppos, &count, 0);
- if (!res)
+ if (!res) {
res = fuse_direct_io(file, buf, count, ppos, 1);
+ if (res > 0)
+ fuse_write_update_size(inode, *ppos);
+ }
mutex_unlock(&inode->i_mutex);
+
+ fuse_invalidate_attr(inode);
+
return res;
}
req->ff = fuse_file_get(ff);
spin_unlock(&fc->lock);
- fuse_write_fill(req, NULL, ff, inode, page_offset(page), 0, 1);
+ fuse_write_fill(req, ff, page_offset(page), 0);
copy_highpage(tmp_page, page);
+ req->misc.write.in.write_flags |= FUSE_WRITE_CACHE;
req->in.argpages = 1;
req->num_pages = 1;
req->pages[0] = tmp_page;
if (vma->vm_flags & VM_MAYSHARE)
return -ENODEV;
+ invalidate_inode_pages2(file->f_mapping);
+
return generic_file_mmap(file, vma);
}
projects / cascardo / linux.git / blobdiff