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fuse: convert sync write to simple api
Extract a fuse_write_flags() helper that converts ki_flags relevant write to open flags. The other parts of fuse_send_write() aren't used in the fuse_perform_write() case. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Miklos Szeredi
parent
00793ca5d4
commit
338f2e3f33
130
fs/fuse/file.c
130
fs/fuse/file.c
@ -553,9 +553,15 @@ void fuse_read_fill(struct fuse_req *req, struct file *file, loff_t pos,
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}
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struct fuse_io_args {
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struct {
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struct fuse_read_in in;
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} read;
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union {
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struct {
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struct fuse_read_in in;
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} read;
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struct {
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struct fuse_write_in in;
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struct fuse_write_out out;
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} write;
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};
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struct fuse_args_pages ap;
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};
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@ -1001,6 +1007,40 @@ static void fuse_write_fill(struct fuse_req *req, struct fuse_file *ff,
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req->out.args[0].value = outarg;
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}
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static void fuse_write_args_fill(struct fuse_io_args *ia, struct fuse_file *ff,
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loff_t pos, size_t count)
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{
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struct fuse_args *args = &ia->ap.args;
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ia->write.in.fh = ff->fh;
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ia->write.in.offset = pos;
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ia->write.in.size = count;
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args->opcode = FUSE_WRITE;
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args->nodeid = ff->nodeid;
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args->in_numargs = 2;
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if (ff->fc->minor < 9)
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args->in_args[0].size = FUSE_COMPAT_WRITE_IN_SIZE;
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else
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args->in_args[0].size = sizeof(ia->write.in);
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args->in_args[0].value = &ia->write.in;
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args->in_args[1].size = count;
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args->out_numargs = 1;
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args->out_args[0].size = sizeof(ia->write.out);
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args->out_args[0].value = &ia->write.out;
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}
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static unsigned int fuse_write_flags(struct kiocb *iocb)
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{
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unsigned int flags = iocb->ki_filp->f_flags;
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if (iocb->ki_flags & IOCB_DSYNC)
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flags |= O_DSYNC;
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if (iocb->ki_flags & IOCB_SYNC)
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flags |= O_SYNC;
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return flags;
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}
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static size_t fuse_send_write(struct fuse_req *req, struct fuse_io_priv *io,
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loff_t pos, size_t count, fl_owner_t owner)
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{
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@ -1011,11 +1051,7 @@ static size_t fuse_send_write(struct fuse_req *req, struct fuse_io_priv *io,
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struct fuse_write_in *inarg = &req->misc.write.in;
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fuse_write_fill(req, ff, pos, count);
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inarg->flags = file->f_flags;
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if (iocb->ki_flags & IOCB_DSYNC)
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inarg->flags |= O_DSYNC;
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if (iocb->ki_flags & IOCB_SYNC)
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inarg->flags |= O_SYNC;
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inarg->flags = fuse_write_flags(iocb);
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if (owner != NULL) {
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inarg->write_flags |= FUSE_WRITE_LOCKOWNER;
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inarg->lock_owner = fuse_lock_owner_id(fc, owner);
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@ -1045,26 +1081,31 @@ bool fuse_write_update_size(struct inode *inode, loff_t pos)
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return ret;
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}
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static size_t fuse_send_write_pages(struct fuse_req *req, struct kiocb *iocb,
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struct inode *inode, loff_t pos,
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size_t count)
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static ssize_t fuse_send_write_pages(struct fuse_io_args *ia,
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struct kiocb *iocb, struct inode *inode,
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loff_t pos, size_t count)
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{
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size_t res;
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unsigned offset;
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unsigned i;
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struct fuse_io_priv io = FUSE_IO_PRIV_SYNC(iocb);
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struct fuse_args_pages *ap = &ia->ap;
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struct file *file = iocb->ki_filp;
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struct fuse_file *ff = file->private_data;
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struct fuse_conn *fc = ff->fc;
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unsigned int offset, i;
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int err;
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for (i = 0; i < req->num_pages; i++)
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fuse_wait_on_page_writeback(inode, req->pages[i]->index);
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for (i = 0; i < ap->num_pages; i++)
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fuse_wait_on_page_writeback(inode, ap->pages[i]->index);
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res = fuse_send_write(req, &io, pos, count, NULL);
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fuse_write_args_fill(ia, ff, pos, count);
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ia->write.in.flags = fuse_write_flags(iocb);
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offset = req->page_descs[0].offset;
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count = res;
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for (i = 0; i < req->num_pages; i++) {
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struct page *page = req->pages[i];
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err = fuse_simple_request(fc, &ap->args);
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if (!req->out.h.error && !offset && count >= PAGE_SIZE)
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offset = ap->descs[0].offset;
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count = ia->write.out.size;
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for (i = 0; i < ap->num_pages; i++) {
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struct page *page = ap->pages[i];
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if (!err && !offset && count >= PAGE_SIZE)
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SetPageUptodate(page);
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if (count > PAGE_SIZE - offset)
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@ -1077,20 +1118,21 @@ static size_t fuse_send_write_pages(struct fuse_req *req, struct kiocb *iocb,
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put_page(page);
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}
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return res;
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return err;
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}
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static ssize_t fuse_fill_write_pages(struct fuse_req *req,
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struct address_space *mapping,
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struct iov_iter *ii, loff_t pos)
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static ssize_t fuse_fill_write_pages(struct fuse_args_pages *ap,
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struct address_space *mapping,
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struct iov_iter *ii, loff_t pos,
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unsigned int max_pages)
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{
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struct fuse_conn *fc = get_fuse_conn(mapping->host);
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unsigned offset = pos & (PAGE_SIZE - 1);
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size_t count = 0;
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int err;
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req->in.argpages = 1;
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req->page_descs[0].offset = offset;
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ap->args.in_pages = true;
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ap->descs[0].offset = offset;
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do {
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size_t tmp;
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@ -1126,9 +1168,9 @@ static ssize_t fuse_fill_write_pages(struct fuse_req *req,
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}
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err = 0;
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req->pages[req->num_pages] = page;
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req->page_descs[req->num_pages].length = tmp;
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req->num_pages++;
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ap->pages[ap->num_pages] = page;
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ap->descs[ap->num_pages].length = tmp;
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ap->num_pages++;
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count += tmp;
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pos += tmp;
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@ -1139,7 +1181,7 @@ static ssize_t fuse_fill_write_pages(struct fuse_req *req,
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if (!fc->big_writes)
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break;
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} while (iov_iter_count(ii) && count < fc->max_write &&
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req->num_pages < req->max_pages && offset == 0);
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ap->num_pages < max_pages && offset == 0);
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return count > 0 ? count : err;
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}
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@ -1167,27 +1209,27 @@ static ssize_t fuse_perform_write(struct kiocb *iocb,
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set_bit(FUSE_I_SIZE_UNSTABLE, &fi->state);
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do {
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struct fuse_req *req;
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ssize_t count;
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struct fuse_io_args ia = {};
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struct fuse_args_pages *ap = &ia.ap;
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unsigned int nr_pages = fuse_wr_pages(pos, iov_iter_count(ii),
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fc->max_pages);
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req = fuse_get_req(fc, nr_pages);
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if (IS_ERR(req)) {
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err = PTR_ERR(req);
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ap->pages = fuse_pages_alloc(nr_pages, GFP_KERNEL, &ap->descs);
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if (!ap->pages) {
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err = -ENOMEM;
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break;
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}
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count = fuse_fill_write_pages(req, mapping, ii, pos);
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count = fuse_fill_write_pages(ap, mapping, ii, pos, nr_pages);
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if (count <= 0) {
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err = count;
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} else {
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size_t num_written;
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num_written = fuse_send_write_pages(req, iocb, inode,
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pos, count);
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err = req->out.h.error;
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err = fuse_send_write_pages(&ia, iocb, inode,
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pos, count);
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if (!err) {
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size_t num_written = ia.write.out.size;
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res += num_written;
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pos += num_written;
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@ -1196,7 +1238,7 @@ static ssize_t fuse_perform_write(struct kiocb *iocb,
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err = -EIO;
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}
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}
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fuse_put_request(fc, req);
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kfree(ap->pages);
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} while (!err && iov_iter_count(ii));
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if (res > 0)
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