From d635711daa98be86d4c7fd01499c34f566b54ccb Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?= Date: Fri, 10 Jun 2016 05:30:17 -0300 Subject: Linux-libre 4.6.2-gnu --- fs/fuse/file.c | 95 +++++++++++++++++++++++++++++----------------------------- 1 file changed, 47 insertions(+), 48 deletions(-) (limited to 'fs/fuse/file.c') diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 416108b42..dcad5e210 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -348,7 +348,7 @@ static bool fuse_range_is_writeback(struct inode *inode, pgoff_t idx_from, pgoff_t curr_index; BUG_ON(req->inode != inode); - curr_index = req->misc.write.in.offset >> PAGE_CACHE_SHIFT; + curr_index = req->misc.write.in.offset >> PAGE_SHIFT; if (idx_from < curr_index + req->num_pages && curr_index <= idx_to) { found = true; @@ -683,11 +683,11 @@ static void fuse_short_read(struct fuse_req *req, struct inode *inode, * present there. */ int i; - int start_idx = num_read >> PAGE_CACHE_SHIFT; - size_t off = num_read & (PAGE_CACHE_SIZE - 1); + int start_idx = num_read >> PAGE_SHIFT; + size_t off = num_read & (PAGE_SIZE - 1); for (i = start_idx; i < req->num_pages; i++) { - zero_user_segment(req->pages[i], off, PAGE_CACHE_SIZE); + zero_user_segment(req->pages[i], off, PAGE_SIZE); off = 0; } } else { @@ -704,7 +704,7 @@ static int fuse_do_readpage(struct file *file, struct page *page) struct fuse_req *req; size_t num_read; loff_t pos = page_offset(page); - size_t count = PAGE_CACHE_SIZE; + size_t count = PAGE_SIZE; u64 attr_ver; int err; @@ -789,7 +789,7 @@ static void fuse_readpages_end(struct fuse_conn *fc, struct fuse_req *req) else SetPageError(page); unlock_page(page); - page_cache_release(page); + put_page(page); } if (req->ff) fuse_file_put(req->ff, false); @@ -800,7 +800,7 @@ static void fuse_send_readpages(struct fuse_req *req, struct file *file) 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; + size_t count = req->num_pages << PAGE_SHIFT; req->out.argpages = 1; req->out.page_zeroing = 1; @@ -836,7 +836,7 @@ static int fuse_readpages_fill(void *_data, struct page *page) if (req->num_pages && (req->num_pages == FUSE_MAX_PAGES_PER_REQ || - (req->num_pages + 1) * PAGE_CACHE_SIZE > fc->max_read || + (req->num_pages + 1) * PAGE_SIZE > fc->max_read || req->pages[req->num_pages - 1]->index + 1 != page->index)) { int nr_alloc = min_t(unsigned, data->nr_pages, FUSE_MAX_PAGES_PER_REQ); @@ -858,7 +858,7 @@ static int fuse_readpages_fill(void *_data, struct page *page) return -EIO; } - page_cache_get(page); + get_page(page); req->pages[req->num_pages] = page; req->page_descs[req->num_pages].length = PAGE_SIZE; req->num_pages++; @@ -1003,17 +1003,17 @@ static size_t fuse_send_write_pages(struct fuse_req *req, struct file *file, for (i = 0; i < req->num_pages; i++) { struct page *page = req->pages[i]; - if (!req->out.h.error && !offset && count >= PAGE_CACHE_SIZE) + if (!req->out.h.error && !offset && count >= PAGE_SIZE) SetPageUptodate(page); - if (count > PAGE_CACHE_SIZE - offset) - count -= PAGE_CACHE_SIZE - offset; + if (count > PAGE_SIZE - offset) + count -= PAGE_SIZE - offset; else count = 0; offset = 0; unlock_page(page); - page_cache_release(page); + put_page(page); } return res; @@ -1024,7 +1024,7 @@ static ssize_t fuse_fill_write_pages(struct fuse_req *req, struct iov_iter *ii, loff_t pos) { struct fuse_conn *fc = get_fuse_conn(mapping->host); - unsigned offset = pos & (PAGE_CACHE_SIZE - 1); + unsigned offset = pos & (PAGE_SIZE - 1); size_t count = 0; int err; @@ -1034,8 +1034,8 @@ static ssize_t fuse_fill_write_pages(struct fuse_req *req, do { size_t tmp; struct page *page; - pgoff_t index = pos >> PAGE_CACHE_SHIFT; - size_t bytes = min_t(size_t, PAGE_CACHE_SIZE - offset, + pgoff_t index = pos >> PAGE_SHIFT; + size_t bytes = min_t(size_t, PAGE_SIZE - offset, iov_iter_count(ii)); bytes = min_t(size_t, bytes, fc->max_write - count); @@ -1059,7 +1059,7 @@ static ssize_t fuse_fill_write_pages(struct fuse_req *req, iov_iter_advance(ii, tmp); if (!tmp) { unlock_page(page); - page_cache_release(page); + put_page(page); bytes = min(bytes, iov_iter_single_seg_count(ii)); goto again; } @@ -1072,7 +1072,7 @@ static ssize_t fuse_fill_write_pages(struct fuse_req *req, count += tmp; pos += tmp; offset += tmp; - if (offset == PAGE_CACHE_SIZE) + if (offset == PAGE_SIZE) offset = 0; if (!fc->big_writes) @@ -1086,8 +1086,8 @@ static ssize_t fuse_fill_write_pages(struct fuse_req *req, static inline unsigned fuse_wr_pages(loff_t pos, size_t len) { return min_t(unsigned, - ((pos + len - 1) >> PAGE_CACHE_SHIFT) - - (pos >> PAGE_CACHE_SHIFT) + 1, + ((pos + len - 1) >> PAGE_SHIFT) - + (pos >> PAGE_SHIFT) + 1, FUSE_MAX_PAGES_PER_REQ); } @@ -1205,8 +1205,8 @@ static ssize_t fuse_file_write_iter(struct kiocb *iocb, struct iov_iter *from) goto out; invalidate_mapping_pages(file->f_mapping, - pos >> PAGE_CACHE_SHIFT, - endbyte >> PAGE_CACHE_SHIFT); + pos >> PAGE_SHIFT, + endbyte >> PAGE_SHIFT); written += written_buffered; iocb->ki_pos = pos + written_buffered; @@ -1247,6 +1247,7 @@ static int fuse_get_user_pages(struct fuse_req *req, struct iov_iter *ii, size_t *nbytesp, int write) { size_t nbytes = 0; /* # bytes already packed in req */ + ssize_t ret = 0; /* Special case for kernel I/O: can copy directly into the buffer */ if (ii->type & ITER_KVEC) { @@ -1266,13 +1267,12 @@ static int fuse_get_user_pages(struct fuse_req *req, struct iov_iter *ii, while (nbytes < *nbytesp && req->num_pages < req->max_pages) { unsigned npages; size_t start; - ssize_t ret = iov_iter_get_pages(ii, - &req->pages[req->num_pages], + ret = iov_iter_get_pages(ii, &req->pages[req->num_pages], *nbytesp - nbytes, req->max_pages - req->num_pages, &start); if (ret < 0) - return ret; + break; iov_iter_advance(ii, ret); nbytes += ret; @@ -1295,7 +1295,7 @@ static int fuse_get_user_pages(struct fuse_req *req, struct iov_iter *ii, *nbytesp = nbytes; - return 0; + return ret < 0 ? ret : 0; } static inline int fuse_iter_npages(const struct iov_iter *ii_p) @@ -1315,10 +1315,11 @@ ssize_t fuse_direct_io(struct fuse_io_priv *io, struct iov_iter *iter, size_t nmax = write ? fc->max_write : fc->max_read; loff_t pos = *ppos; size_t count = iov_iter_count(iter); - pgoff_t idx_from = pos >> PAGE_CACHE_SHIFT; - pgoff_t idx_to = (pos + count - 1) >> PAGE_CACHE_SHIFT; + pgoff_t idx_from = pos >> PAGE_SHIFT; + pgoff_t idx_to = (pos + count - 1) >> PAGE_SHIFT; ssize_t res = 0; struct fuse_req *req; + int err = 0; if (io->async) req = fuse_get_req_for_background(fc, fuse_iter_npages(iter)); @@ -1339,11 +1340,9 @@ ssize_t fuse_direct_io(struct fuse_io_priv *io, struct iov_iter *iter, size_t nres; fl_owner_t owner = current->files; size_t nbytes = min(count, nmax); - int err = fuse_get_user_pages(req, iter, &nbytes, write); - if (err) { - res = err; + err = fuse_get_user_pages(req, iter, &nbytes, write); + if (err && !nbytes) break; - } if (write) nres = fuse_send_write(req, io, pos, nbytes, owner); @@ -1353,11 +1352,11 @@ ssize_t fuse_direct_io(struct fuse_io_priv *io, struct iov_iter *iter, if (!io->async) fuse_release_user_pages(req, !write); if (req->out.h.error) { - if (!res) - res = req->out.h.error; + err = req->out.h.error; break; } else if (nres > nbytes) { - res = -EIO; + res = 0; + err = -EIO; break; } count -= nres; @@ -1381,7 +1380,7 @@ ssize_t fuse_direct_io(struct fuse_io_priv *io, struct iov_iter *iter, if (res > 0) *ppos = pos; - return res; + return res > 0 ? res : err; } EXPORT_SYMBOL_GPL(fuse_direct_io); @@ -1467,7 +1466,7 @@ __acquires(fc->lock) { struct fuse_inode *fi = get_fuse_inode(req->inode); struct fuse_write_in *inarg = &req->misc.write.in; - __u64 data_size = req->num_pages * PAGE_CACHE_SIZE; + __u64 data_size = req->num_pages * PAGE_SIZE; if (!fc->connected) goto out_free; @@ -1728,7 +1727,7 @@ static bool fuse_writepage_in_flight(struct fuse_req *new_req, list_del(&new_req->writepages_entry); list_for_each_entry(old_req, &fi->writepages, writepages_entry) { BUG_ON(old_req->inode != new_req->inode); - curr_index = old_req->misc.write.in.offset >> PAGE_CACHE_SHIFT; + curr_index = old_req->misc.write.in.offset >> PAGE_SHIFT; if (curr_index <= page->index && page->index < curr_index + old_req->num_pages) { found = true; @@ -1743,7 +1742,7 @@ static bool fuse_writepage_in_flight(struct fuse_req *new_req, new_req->num_pages = 1; for (tmp = old_req; tmp != NULL; tmp = tmp->misc.write.next) { BUG_ON(tmp->inode != new_req->inode); - curr_index = tmp->misc.write.in.offset >> PAGE_CACHE_SHIFT; + curr_index = tmp->misc.write.in.offset >> PAGE_SHIFT; if (tmp->num_pages == 1 && curr_index == page->index) { old_req = tmp; @@ -1800,7 +1799,7 @@ static int fuse_writepages_fill(struct page *page, if (req && req->num_pages && (is_writeback || req->num_pages == FUSE_MAX_PAGES_PER_REQ || - (req->num_pages + 1) * PAGE_CACHE_SIZE > fc->max_write || + (req->num_pages + 1) * PAGE_SIZE > fc->max_write || data->orig_pages[req->num_pages - 1]->index + 1 != page->index)) { fuse_writepages_send(data); data->req = NULL; @@ -1925,7 +1924,7 @@ static int fuse_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) { - pgoff_t index = pos >> PAGE_CACHE_SHIFT; + pgoff_t index = pos >> PAGE_SHIFT; struct fuse_conn *fc = get_fuse_conn(file_inode(file)); struct page *page; loff_t fsize; @@ -1939,15 +1938,15 @@ static int fuse_write_begin(struct file *file, struct address_space *mapping, fuse_wait_on_page_writeback(mapping->host, page->index); - if (PageUptodate(page) || len == PAGE_CACHE_SIZE) + if (PageUptodate(page) || len == PAGE_SIZE) goto success; /* * Check if the start this page comes after the end of file, in which * case the readpage can be optimized away. */ fsize = i_size_read(mapping->host); - if (fsize <= (pos & PAGE_CACHE_MASK)) { - size_t off = pos & ~PAGE_CACHE_MASK; + if (fsize <= (pos & PAGE_MASK)) { + size_t off = pos & ~PAGE_MASK; if (off) zero_user_segment(page, 0, off); goto success; @@ -1961,7 +1960,7 @@ success: cleanup: unlock_page(page); - page_cache_release(page); + put_page(page); error: return err; } @@ -1974,16 +1973,16 @@ static int fuse_write_end(struct file *file, struct address_space *mapping, if (!PageUptodate(page)) { /* Zero any unwritten bytes at the end of the page */ - size_t endoff = (pos + copied) & ~PAGE_CACHE_MASK; + size_t endoff = (pos + copied) & ~PAGE_MASK; if (endoff) - zero_user_segment(page, endoff, PAGE_CACHE_SIZE); + zero_user_segment(page, endoff, PAGE_SIZE); SetPageUptodate(page); } fuse_write_update_size(inode, pos + copied); set_page_dirty(page); unlock_page(page); - page_cache_release(page); + put_page(page); return copied; } -- cgit v1.2.3