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![Matthew Wilcox (Oracle)](/assets/img/avatar_default.png)
The page cache clears the error bit before calling ->read_folio(), so this condition could never have been true. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
1141 lines
29 KiB
C
1141 lines
29 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* (C) 2001 Clemson University and The University of Chicago
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* Copyright 2018 Omnibond Systems, L.L.C.
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*
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* See COPYING in top-level directory.
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*/
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/*
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* Linux VFS inode operations.
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*/
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#include <linux/blkdev.h>
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#include <linux/fileattr.h>
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#include "protocol.h"
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#include "orangefs-kernel.h"
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#include "orangefs-bufmap.h"
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static int orangefs_writepage_locked(struct page *page,
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struct writeback_control *wbc)
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{
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struct inode *inode = page->mapping->host;
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struct orangefs_write_range *wr = NULL;
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struct iov_iter iter;
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struct bio_vec bv;
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size_t len, wlen;
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ssize_t ret;
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loff_t off;
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set_page_writeback(page);
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len = i_size_read(inode);
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if (PagePrivate(page)) {
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wr = (struct orangefs_write_range *)page_private(page);
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WARN_ON(wr->pos >= len);
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off = wr->pos;
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if (off + wr->len > len)
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wlen = len - off;
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else
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wlen = wr->len;
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} else {
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WARN_ON(1);
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off = page_offset(page);
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if (off + PAGE_SIZE > len)
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wlen = len - off;
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else
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wlen = PAGE_SIZE;
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}
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/* Should've been handled in orangefs_invalidate_folio. */
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WARN_ON(off == len || off + wlen > len);
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bv.bv_page = page;
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bv.bv_len = wlen;
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bv.bv_offset = off % PAGE_SIZE;
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WARN_ON(wlen == 0);
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iov_iter_bvec(&iter, WRITE, &bv, 1, wlen);
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ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, wlen,
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len, wr, NULL, NULL);
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if (ret < 0) {
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SetPageError(page);
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mapping_set_error(page->mapping, ret);
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} else {
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ret = 0;
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}
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kfree(detach_page_private(page));
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return ret;
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}
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static int orangefs_writepage(struct page *page, struct writeback_control *wbc)
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{
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int ret;
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ret = orangefs_writepage_locked(page, wbc);
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unlock_page(page);
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end_page_writeback(page);
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return ret;
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}
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struct orangefs_writepages {
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loff_t off;
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size_t len;
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kuid_t uid;
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kgid_t gid;
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int maxpages;
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int npages;
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struct page **pages;
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struct bio_vec *bv;
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};
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static int orangefs_writepages_work(struct orangefs_writepages *ow,
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struct writeback_control *wbc)
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{
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struct inode *inode = ow->pages[0]->mapping->host;
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struct orangefs_write_range *wrp, wr;
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struct iov_iter iter;
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ssize_t ret;
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size_t len;
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loff_t off;
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int i;
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len = i_size_read(inode);
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for (i = 0; i < ow->npages; i++) {
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set_page_writeback(ow->pages[i]);
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ow->bv[i].bv_page = ow->pages[i];
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ow->bv[i].bv_len = min(page_offset(ow->pages[i]) + PAGE_SIZE,
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ow->off + ow->len) -
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max(ow->off, page_offset(ow->pages[i]));
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if (i == 0)
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ow->bv[i].bv_offset = ow->off -
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page_offset(ow->pages[i]);
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else
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ow->bv[i].bv_offset = 0;
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}
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iov_iter_bvec(&iter, WRITE, ow->bv, ow->npages, ow->len);
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WARN_ON(ow->off >= len);
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if (ow->off + ow->len > len)
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ow->len = len - ow->off;
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off = ow->off;
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wr.uid = ow->uid;
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wr.gid = ow->gid;
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ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, ow->len,
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0, &wr, NULL, NULL);
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if (ret < 0) {
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for (i = 0; i < ow->npages; i++) {
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SetPageError(ow->pages[i]);
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mapping_set_error(ow->pages[i]->mapping, ret);
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if (PagePrivate(ow->pages[i])) {
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wrp = (struct orangefs_write_range *)
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page_private(ow->pages[i]);
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ClearPagePrivate(ow->pages[i]);
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put_page(ow->pages[i]);
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kfree(wrp);
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}
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end_page_writeback(ow->pages[i]);
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unlock_page(ow->pages[i]);
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}
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} else {
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ret = 0;
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for (i = 0; i < ow->npages; i++) {
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if (PagePrivate(ow->pages[i])) {
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wrp = (struct orangefs_write_range *)
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page_private(ow->pages[i]);
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ClearPagePrivate(ow->pages[i]);
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put_page(ow->pages[i]);
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kfree(wrp);
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}
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end_page_writeback(ow->pages[i]);
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unlock_page(ow->pages[i]);
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}
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}
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return ret;
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}
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static int orangefs_writepages_callback(struct page *page,
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struct writeback_control *wbc, void *data)
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{
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struct orangefs_writepages *ow = data;
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struct orangefs_write_range *wr;
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int ret;
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if (!PagePrivate(page)) {
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unlock_page(page);
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/* It's not private so there's nothing to write, right? */
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printk("writepages_callback not private!\n");
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BUG();
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return 0;
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}
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wr = (struct orangefs_write_range *)page_private(page);
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ret = -1;
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if (ow->npages == 0) {
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ow->off = wr->pos;
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ow->len = wr->len;
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ow->uid = wr->uid;
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ow->gid = wr->gid;
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ow->pages[ow->npages++] = page;
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ret = 0;
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goto done;
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}
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if (!uid_eq(ow->uid, wr->uid) || !gid_eq(ow->gid, wr->gid)) {
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orangefs_writepages_work(ow, wbc);
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ow->npages = 0;
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ret = -1;
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goto done;
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}
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if (ow->off + ow->len == wr->pos) {
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ow->len += wr->len;
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ow->pages[ow->npages++] = page;
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ret = 0;
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goto done;
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}
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done:
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if (ret == -1) {
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if (ow->npages) {
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orangefs_writepages_work(ow, wbc);
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ow->npages = 0;
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}
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ret = orangefs_writepage_locked(page, wbc);
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mapping_set_error(page->mapping, ret);
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unlock_page(page);
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end_page_writeback(page);
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} else {
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if (ow->npages == ow->maxpages) {
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orangefs_writepages_work(ow, wbc);
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ow->npages = 0;
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}
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}
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return ret;
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}
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static int orangefs_writepages(struct address_space *mapping,
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struct writeback_control *wbc)
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{
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struct orangefs_writepages *ow;
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struct blk_plug plug;
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int ret;
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ow = kzalloc(sizeof(struct orangefs_writepages), GFP_KERNEL);
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if (!ow)
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return -ENOMEM;
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ow->maxpages = orangefs_bufmap_size_query()/PAGE_SIZE;
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ow->pages = kcalloc(ow->maxpages, sizeof(struct page *), GFP_KERNEL);
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if (!ow->pages) {
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kfree(ow);
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return -ENOMEM;
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}
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ow->bv = kcalloc(ow->maxpages, sizeof(struct bio_vec), GFP_KERNEL);
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if (!ow->bv) {
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kfree(ow->pages);
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kfree(ow);
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return -ENOMEM;
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}
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blk_start_plug(&plug);
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ret = write_cache_pages(mapping, wbc, orangefs_writepages_callback, ow);
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if (ow->npages)
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ret = orangefs_writepages_work(ow, wbc);
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blk_finish_plug(&plug);
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kfree(ow->pages);
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kfree(ow->bv);
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kfree(ow);
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return ret;
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}
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static int orangefs_launder_folio(struct folio *);
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static void orangefs_readahead(struct readahead_control *rac)
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{
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loff_t offset;
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struct iov_iter iter;
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struct inode *inode = rac->mapping->host;
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struct xarray *i_pages;
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struct page *page;
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loff_t new_start = readahead_pos(rac);
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int ret;
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size_t new_len = 0;
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loff_t bytes_remaining = inode->i_size - readahead_pos(rac);
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loff_t pages_remaining = bytes_remaining / PAGE_SIZE;
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if (pages_remaining >= 1024)
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new_len = 4194304;
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else if (pages_remaining > readahead_count(rac))
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new_len = bytes_remaining;
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if (new_len)
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readahead_expand(rac, new_start, new_len);
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offset = readahead_pos(rac);
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i_pages = &rac->mapping->i_pages;
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iov_iter_xarray(&iter, READ, i_pages, offset, readahead_length(rac));
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/* read in the pages. */
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if ((ret = wait_for_direct_io(ORANGEFS_IO_READ, inode,
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&offset, &iter, readahead_length(rac),
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inode->i_size, NULL, NULL, rac->file)) < 0)
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gossip_debug(GOSSIP_FILE_DEBUG,
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"%s: wait_for_direct_io failed. \n", __func__);
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else
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ret = 0;
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/* clean up. */
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while ((page = readahead_page(rac))) {
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page_endio(page, false, ret);
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put_page(page);
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}
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}
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static int orangefs_read_folio(struct file *file, struct folio *folio)
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{
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struct inode *inode = folio->mapping->host;
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struct iov_iter iter;
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struct bio_vec bv;
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ssize_t ret;
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loff_t off; /* offset of this folio in the file */
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if (folio_test_dirty(folio))
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orangefs_launder_folio(folio);
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off = folio_pos(folio);
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bv.bv_page = &folio->page;
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bv.bv_len = folio_size(folio);
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bv.bv_offset = 0;
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iov_iter_bvec(&iter, READ, &bv, 1, folio_size(folio));
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ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, &off, &iter,
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folio_size(folio), inode->i_size, NULL, NULL, file);
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/* this will only zero remaining unread portions of the folio data */
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iov_iter_zero(~0U, &iter);
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/* takes care of potential aliasing */
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flush_dcache_folio(folio);
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if (ret < 0) {
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folio_set_error(folio);
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} else {
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folio_mark_uptodate(folio);
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ret = 0;
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}
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/* unlock the folio after the ->read_folio() routine completes */
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folio_unlock(folio);
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return ret;
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}
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static int orangefs_write_begin(struct file *file,
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struct address_space *mapping, loff_t pos, unsigned len,
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struct page **pagep, void **fsdata)
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{
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struct orangefs_write_range *wr;
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struct folio *folio;
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struct page *page;
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pgoff_t index;
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int ret;
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index = pos >> PAGE_SHIFT;
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page = grab_cache_page_write_begin(mapping, index);
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if (!page)
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return -ENOMEM;
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*pagep = page;
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folio = page_folio(page);
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if (folio_test_dirty(folio) && !folio_test_private(folio)) {
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/*
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* Should be impossible. If it happens, launder the page
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* since we don't know what's dirty. This will WARN in
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* orangefs_writepage_locked.
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*/
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ret = orangefs_launder_folio(folio);
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if (ret)
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return ret;
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}
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if (folio_test_private(folio)) {
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struct orangefs_write_range *wr;
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wr = folio_get_private(folio);
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if (wr->pos + wr->len == pos &&
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uid_eq(wr->uid, current_fsuid()) &&
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gid_eq(wr->gid, current_fsgid())) {
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wr->len += len;
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goto okay;
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} else {
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ret = orangefs_launder_folio(folio);
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if (ret)
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return ret;
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}
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}
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wr = kmalloc(sizeof *wr, GFP_KERNEL);
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if (!wr)
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return -ENOMEM;
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wr->pos = pos;
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wr->len = len;
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wr->uid = current_fsuid();
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wr->gid = current_fsgid();
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folio_attach_private(folio, wr);
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okay:
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return 0;
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}
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static int orangefs_write_end(struct file *file, struct address_space *mapping,
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loff_t pos, unsigned len, unsigned copied, struct page *page, void *fsdata)
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{
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struct inode *inode = page->mapping->host;
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loff_t last_pos = pos + copied;
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/*
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* No need to use i_size_read() here, the i_size
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* cannot change under us because we hold the i_mutex.
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*/
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if (last_pos > inode->i_size)
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i_size_write(inode, last_pos);
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/* zero the stale part of the page if we did a short copy */
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if (!PageUptodate(page)) {
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unsigned from = pos & (PAGE_SIZE - 1);
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if (copied < len) {
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zero_user(page, from + copied, len - copied);
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}
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/* Set fully written pages uptodate. */
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if (pos == page_offset(page) &&
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(len == PAGE_SIZE || pos + len == inode->i_size)) {
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zero_user_segment(page, from + copied, PAGE_SIZE);
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SetPageUptodate(page);
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}
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}
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set_page_dirty(page);
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unlock_page(page);
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put_page(page);
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mark_inode_dirty_sync(file_inode(file));
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return copied;
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}
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static void orangefs_invalidate_folio(struct folio *folio,
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size_t offset, size_t length)
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{
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struct orangefs_write_range *wr = folio_get_private(folio);
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if (offset == 0 && length == PAGE_SIZE) {
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kfree(folio_detach_private(folio));
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return;
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/* write range entirely within invalidate range (or equal) */
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} else if (folio_pos(folio) + offset <= wr->pos &&
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wr->pos + wr->len <= folio_pos(folio) + offset + length) {
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kfree(folio_detach_private(folio));
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/* XXX is this right? only caller in fs */
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folio_cancel_dirty(folio);
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return;
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/* invalidate range chops off end of write range */
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} else if (wr->pos < folio_pos(folio) + offset &&
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wr->pos + wr->len <= folio_pos(folio) + offset + length &&
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folio_pos(folio) + offset < wr->pos + wr->len) {
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size_t x;
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x = wr->pos + wr->len - (folio_pos(folio) + offset);
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WARN_ON(x > wr->len);
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wr->len -= x;
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wr->uid = current_fsuid();
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wr->gid = current_fsgid();
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/* invalidate range chops off beginning of write range */
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} else if (folio_pos(folio) + offset <= wr->pos &&
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folio_pos(folio) + offset + length < wr->pos + wr->len &&
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wr->pos < folio_pos(folio) + offset + length) {
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size_t x;
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x = folio_pos(folio) + offset + length - wr->pos;
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WARN_ON(x > wr->len);
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wr->pos += x;
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wr->len -= x;
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wr->uid = current_fsuid();
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wr->gid = current_fsgid();
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/* invalidate range entirely within write range (punch hole) */
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} else if (wr->pos < folio_pos(folio) + offset &&
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folio_pos(folio) + offset + length < wr->pos + wr->len) {
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/* XXX what do we do here... should not WARN_ON */
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WARN_ON(1);
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/* punch hole */
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/*
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* should we just ignore this and write it out anyway?
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* it hardly makes sense
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*/
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return;
|
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/* non-overlapping ranges */
|
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} else {
|
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/* WARN if they do overlap */
|
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if (!((folio_pos(folio) + offset + length <= wr->pos) ^
|
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(wr->pos + wr->len <= folio_pos(folio) + offset))) {
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WARN_ON(1);
|
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printk("invalidate range offset %llu length %zu\n",
|
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folio_pos(folio) + offset, length);
|
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printk("write range offset %llu length %zu\n",
|
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wr->pos, wr->len);
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}
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return;
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}
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|
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/*
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* Above there are returns where wr is freed or where we WARN.
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* Thus the following runs if wr was modified above.
|
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*/
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|
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orangefs_launder_folio(folio);
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}
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|
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static bool orangefs_release_folio(struct folio *folio, gfp_t foo)
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{
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return !folio_test_private(folio);
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}
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|
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static void orangefs_free_folio(struct folio *folio)
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{
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kfree(folio_detach_private(folio));
|
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}
|
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|
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static int orangefs_launder_folio(struct folio *folio)
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{
|
|
int r = 0;
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struct writeback_control wbc = {
|
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.sync_mode = WB_SYNC_ALL,
|
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.nr_to_write = 0,
|
|
};
|
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folio_wait_writeback(folio);
|
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if (folio_clear_dirty_for_io(folio)) {
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r = orangefs_writepage_locked(&folio->page, &wbc);
|
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folio_end_writeback(folio);
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}
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return r;
|
|
}
|
|
|
|
static ssize_t orangefs_direct_IO(struct kiocb *iocb,
|
|
struct iov_iter *iter)
|
|
{
|
|
/*
|
|
* Comment from original do_readv_writev:
|
|
* Common entry point for read/write/readv/writev
|
|
* This function will dispatch it to either the direct I/O
|
|
* or buffered I/O path depending on the mount options and/or
|
|
* augmented/extended metadata attached to the file.
|
|
* Note: File extended attributes override any mount options.
|
|
*/
|
|
struct file *file = iocb->ki_filp;
|
|
loff_t pos = iocb->ki_pos;
|
|
enum ORANGEFS_io_type type = iov_iter_rw(iter) == WRITE ?
|
|
ORANGEFS_IO_WRITE : ORANGEFS_IO_READ;
|
|
loff_t *offset = &pos;
|
|
struct inode *inode = file->f_mapping->host;
|
|
struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
|
|
struct orangefs_khandle *handle = &orangefs_inode->refn.khandle;
|
|
size_t count = iov_iter_count(iter);
|
|
ssize_t total_count = 0;
|
|
ssize_t ret = -EINVAL;
|
|
int i = 0;
|
|
|
|
gossip_debug(GOSSIP_FILE_DEBUG,
|
|
"%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n",
|
|
__func__,
|
|
handle,
|
|
(int)count);
|
|
|
|
if (type == ORANGEFS_IO_WRITE) {
|
|
gossip_debug(GOSSIP_FILE_DEBUG,
|
|
"%s(%pU): proceeding with offset : %llu, "
|
|
"size %d\n",
|
|
__func__,
|
|
handle,
|
|
llu(*offset),
|
|
(int)count);
|
|
}
|
|
|
|
if (count == 0) {
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
|
|
while (iov_iter_count(iter)) {
|
|
size_t each_count = iov_iter_count(iter);
|
|
size_t amt_complete;
|
|
i++;
|
|
|
|
/* how much to transfer in this loop iteration */
|
|
if (each_count > orangefs_bufmap_size_query())
|
|
each_count = orangefs_bufmap_size_query();
|
|
|
|
gossip_debug(GOSSIP_FILE_DEBUG,
|
|
"%s(%pU): size of each_count(%d)\n",
|
|
__func__,
|
|
handle,
|
|
(int)each_count);
|
|
gossip_debug(GOSSIP_FILE_DEBUG,
|
|
"%s(%pU): BEFORE wait_for_io: offset is %d\n",
|
|
__func__,
|
|
handle,
|
|
(int)*offset);
|
|
|
|
ret = wait_for_direct_io(type, inode, offset, iter,
|
|
each_count, 0, NULL, NULL, file);
|
|
gossip_debug(GOSSIP_FILE_DEBUG,
|
|
"%s(%pU): return from wait_for_io:%d\n",
|
|
__func__,
|
|
handle,
|
|
(int)ret);
|
|
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
*offset += ret;
|
|
total_count += ret;
|
|
amt_complete = ret;
|
|
|
|
gossip_debug(GOSSIP_FILE_DEBUG,
|
|
"%s(%pU): AFTER wait_for_io: offset is %d\n",
|
|
__func__,
|
|
handle,
|
|
(int)*offset);
|
|
|
|
/*
|
|
* if we got a short I/O operations,
|
|
* fall out and return what we got so far
|
|
*/
|
|
if (amt_complete < each_count)
|
|
break;
|
|
} /*end while */
|
|
|
|
out:
|
|
if (total_count > 0)
|
|
ret = total_count;
|
|
if (ret > 0) {
|
|
if (type == ORANGEFS_IO_READ) {
|
|
file_accessed(file);
|
|
} else {
|
|
file_update_time(file);
|
|
if (*offset > i_size_read(inode))
|
|
i_size_write(inode, *offset);
|
|
}
|
|
}
|
|
|
|
gossip_debug(GOSSIP_FILE_DEBUG,
|
|
"%s(%pU): Value(%d) returned.\n",
|
|
__func__,
|
|
handle,
|
|
(int)ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/** ORANGEFS2 implementation of address space operations */
|
|
static const struct address_space_operations orangefs_address_operations = {
|
|
.writepage = orangefs_writepage,
|
|
.readahead = orangefs_readahead,
|
|
.read_folio = orangefs_read_folio,
|
|
.writepages = orangefs_writepages,
|
|
.dirty_folio = filemap_dirty_folio,
|
|
.write_begin = orangefs_write_begin,
|
|
.write_end = orangefs_write_end,
|
|
.invalidate_folio = orangefs_invalidate_folio,
|
|
.release_folio = orangefs_release_folio,
|
|
.free_folio = orangefs_free_folio,
|
|
.launder_folio = orangefs_launder_folio,
|
|
.direct_IO = orangefs_direct_IO,
|
|
};
|
|
|
|
vm_fault_t orangefs_page_mkwrite(struct vm_fault *vmf)
|
|
{
|
|
struct folio *folio = page_folio(vmf->page);
|
|
struct inode *inode = file_inode(vmf->vma->vm_file);
|
|
struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
|
|
unsigned long *bitlock = &orangefs_inode->bitlock;
|
|
vm_fault_t ret;
|
|
struct orangefs_write_range *wr;
|
|
|
|
sb_start_pagefault(inode->i_sb);
|
|
|
|
if (wait_on_bit(bitlock, 1, TASK_KILLABLE)) {
|
|
ret = VM_FAULT_RETRY;
|
|
goto out;
|
|
}
|
|
|
|
folio_lock(folio);
|
|
if (folio_test_dirty(folio) && !folio_test_private(folio)) {
|
|
/*
|
|
* Should be impossible. If it happens, launder the folio
|
|
* since we don't know what's dirty. This will WARN in
|
|
* orangefs_writepage_locked.
|
|
*/
|
|
if (orangefs_launder_folio(folio)) {
|
|
ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
|
|
goto out;
|
|
}
|
|
}
|
|
if (folio_test_private(folio)) {
|
|
wr = folio_get_private(folio);
|
|
if (uid_eq(wr->uid, current_fsuid()) &&
|
|
gid_eq(wr->gid, current_fsgid())) {
|
|
wr->pos = page_offset(vmf->page);
|
|
wr->len = PAGE_SIZE;
|
|
goto okay;
|
|
} else {
|
|
if (orangefs_launder_folio(folio)) {
|
|
ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
wr = kmalloc(sizeof *wr, GFP_KERNEL);
|
|
if (!wr) {
|
|
ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
|
|
goto out;
|
|
}
|
|
wr->pos = page_offset(vmf->page);
|
|
wr->len = PAGE_SIZE;
|
|
wr->uid = current_fsuid();
|
|
wr->gid = current_fsgid();
|
|
folio_attach_private(folio, wr);
|
|
okay:
|
|
|
|
file_update_time(vmf->vma->vm_file);
|
|
if (folio->mapping != inode->i_mapping) {
|
|
folio_unlock(folio);
|
|
ret = VM_FAULT_LOCKED|VM_FAULT_NOPAGE;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* We mark the folio dirty already here so that when freeze is in
|
|
* progress, we are guaranteed that writeback during freezing will
|
|
* see the dirty folio and writeprotect it again.
|
|
*/
|
|
folio_mark_dirty(folio);
|
|
folio_wait_stable(folio);
|
|
ret = VM_FAULT_LOCKED;
|
|
out:
|
|
sb_end_pagefault(inode->i_sb);
|
|
return ret;
|
|
}
|
|
|
|
static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
|
|
{
|
|
struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
|
|
struct orangefs_kernel_op_s *new_op;
|
|
loff_t orig_size;
|
|
int ret = -EINVAL;
|
|
|
|
gossip_debug(GOSSIP_INODE_DEBUG,
|
|
"%s: %pU: Handle is %pU | fs_id %d | size is %llu\n",
|
|
__func__,
|
|
get_khandle_from_ino(inode),
|
|
&orangefs_inode->refn.khandle,
|
|
orangefs_inode->refn.fs_id,
|
|
iattr->ia_size);
|
|
|
|
/* Ensure that we have a up to date size, so we know if it changed. */
|
|
ret = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_SIZE);
|
|
if (ret == -ESTALE)
|
|
ret = -EIO;
|
|
if (ret) {
|
|
gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
|
|
__func__, ret);
|
|
return ret;
|
|
}
|
|
orig_size = i_size_read(inode);
|
|
|
|
/* This is truncate_setsize in a different order. */
|
|
truncate_pagecache(inode, iattr->ia_size);
|
|
i_size_write(inode, iattr->ia_size);
|
|
if (iattr->ia_size > orig_size)
|
|
pagecache_isize_extended(inode, orig_size, iattr->ia_size);
|
|
|
|
new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE);
|
|
if (!new_op)
|
|
return -ENOMEM;
|
|
|
|
new_op->upcall.req.truncate.refn = orangefs_inode->refn;
|
|
new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;
|
|
|
|
ret = service_operation(new_op,
|
|
__func__,
|
|
get_interruptible_flag(inode));
|
|
|
|
/*
|
|
* the truncate has no downcall members to retrieve, but
|
|
* the status value tells us if it went through ok or not
|
|
*/
|
|
gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret);
|
|
|
|
op_release(new_op);
|
|
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
if (orig_size != i_size_read(inode))
|
|
iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
|
|
|
|
return ret;
|
|
}
|
|
|
|
int __orangefs_setattr(struct inode *inode, struct iattr *iattr)
|
|
{
|
|
int ret;
|
|
|
|
if (iattr->ia_valid & ATTR_MODE) {
|
|
if (iattr->ia_mode & (S_ISVTX)) {
|
|
if (is_root_handle(inode)) {
|
|
/*
|
|
* allow sticky bit to be set on root (since
|
|
* it shows up that way by default anyhow),
|
|
* but don't show it to the server
|
|
*/
|
|
iattr->ia_mode -= S_ISVTX;
|
|
} else {
|
|
gossip_debug(GOSSIP_UTILS_DEBUG,
|
|
"User attempted to set sticky bit on non-root directory; returning EINVAL.\n");
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
if (iattr->ia_mode & (S_ISUID)) {
|
|
gossip_debug(GOSSIP_UTILS_DEBUG,
|
|
"Attempting to set setuid bit (not supported); returning EINVAL.\n");
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (iattr->ia_valid & ATTR_SIZE) {
|
|
ret = orangefs_setattr_size(inode, iattr);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
again:
|
|
spin_lock(&inode->i_lock);
|
|
if (ORANGEFS_I(inode)->attr_valid) {
|
|
if (uid_eq(ORANGEFS_I(inode)->attr_uid, current_fsuid()) &&
|
|
gid_eq(ORANGEFS_I(inode)->attr_gid, current_fsgid())) {
|
|
ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
|
|
} else {
|
|
spin_unlock(&inode->i_lock);
|
|
write_inode_now(inode, 1);
|
|
goto again;
|
|
}
|
|
} else {
|
|
ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
|
|
ORANGEFS_I(inode)->attr_uid = current_fsuid();
|
|
ORANGEFS_I(inode)->attr_gid = current_fsgid();
|
|
}
|
|
setattr_copy(&init_user_ns, inode, iattr);
|
|
spin_unlock(&inode->i_lock);
|
|
mark_inode_dirty(inode);
|
|
|
|
if (iattr->ia_valid & ATTR_MODE)
|
|
/* change mod on a file that has ACLs */
|
|
ret = posix_acl_chmod(&init_user_ns, inode, inode->i_mode);
|
|
|
|
ret = 0;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Change attributes of an object referenced by dentry.
|
|
*/
|
|
int orangefs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
|
|
struct iattr *iattr)
|
|
{
|
|
int ret;
|
|
gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n",
|
|
dentry);
|
|
ret = setattr_prepare(&init_user_ns, dentry, iattr);
|
|
if (ret)
|
|
goto out;
|
|
ret = __orangefs_setattr(d_inode(dentry), iattr);
|
|
sync_inode_metadata(d_inode(dentry), 1);
|
|
out:
|
|
gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Obtain attributes of an object given a dentry
|
|
*/
|
|
int orangefs_getattr(struct user_namespace *mnt_userns, const struct path *path,
|
|
struct kstat *stat, u32 request_mask, unsigned int flags)
|
|
{
|
|
int ret;
|
|
struct inode *inode = path->dentry->d_inode;
|
|
|
|
gossip_debug(GOSSIP_INODE_DEBUG,
|
|
"orangefs_getattr: called on %pd mask %u\n",
|
|
path->dentry, request_mask);
|
|
|
|
ret = orangefs_inode_getattr(inode,
|
|
request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0);
|
|
if (ret == 0) {
|
|
generic_fillattr(&init_user_ns, inode, stat);
|
|
|
|
/* override block size reported to stat */
|
|
if (!(request_mask & STATX_SIZE))
|
|
stat->result_mask &= ~STATX_SIZE;
|
|
|
|
generic_fill_statx_attr(inode, stat);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int orangefs_permission(struct user_namespace *mnt_userns,
|
|
struct inode *inode, int mask)
|
|
{
|
|
int ret;
|
|
|
|
if (mask & MAY_NOT_BLOCK)
|
|
return -ECHILD;
|
|
|
|
gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
|
|
|
|
/* Make sure the permission (and other common attrs) are up to date. */
|
|
ret = orangefs_inode_getattr(inode, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return generic_permission(&init_user_ns, inode, mask);
|
|
}
|
|
|
|
int orangefs_update_time(struct inode *inode, struct timespec64 *time, int flags)
|
|
{
|
|
struct iattr iattr;
|
|
gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n",
|
|
get_khandle_from_ino(inode));
|
|
generic_update_time(inode, time, flags);
|
|
memset(&iattr, 0, sizeof iattr);
|
|
if (flags & S_ATIME)
|
|
iattr.ia_valid |= ATTR_ATIME;
|
|
if (flags & S_CTIME)
|
|
iattr.ia_valid |= ATTR_CTIME;
|
|
if (flags & S_MTIME)
|
|
iattr.ia_valid |= ATTR_MTIME;
|
|
return __orangefs_setattr(inode, &iattr);
|
|
}
|
|
|
|
static int orangefs_fileattr_get(struct dentry *dentry, struct fileattr *fa)
|
|
{
|
|
u64 val = 0;
|
|
int ret;
|
|
|
|
gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__,
|
|
dentry);
|
|
|
|
ret = orangefs_inode_getxattr(d_inode(dentry),
|
|
"user.pvfs2.meta_hint",
|
|
&val, sizeof(val));
|
|
if (ret < 0 && ret != -ENODATA)
|
|
return ret;
|
|
|
|
gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val);
|
|
|
|
fileattr_fill_flags(fa, val);
|
|
return 0;
|
|
}
|
|
|
|
static int orangefs_fileattr_set(struct user_namespace *mnt_userns,
|
|
struct dentry *dentry, struct fileattr *fa)
|
|
{
|
|
u64 val = 0;
|
|
|
|
gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__,
|
|
dentry);
|
|
/*
|
|
* ORANGEFS_MIRROR_FL is set internally when the mirroring mode is
|
|
* turned on for a file. The user is not allowed to turn on this bit,
|
|
* but the bit is present if the user first gets the flags and then
|
|
* updates the flags with some new settings. So, we ignore it in the
|
|
* following edit. bligon.
|
|
*/
|
|
if (fileattr_has_fsx(fa) ||
|
|
(fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NOATIME_FL | ORANGEFS_MIRROR_FL))) {
|
|
gossip_err("%s: only supports setting one of FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NOATIME_FL\n",
|
|
__func__);
|
|
return -EOPNOTSUPP;
|
|
}
|
|
val = fa->flags;
|
|
gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val);
|
|
return orangefs_inode_setxattr(d_inode(dentry),
|
|
"user.pvfs2.meta_hint",
|
|
&val, sizeof(val), 0);
|
|
}
|
|
|
|
/* ORANGEFS2 implementation of VFS inode operations for files */
|
|
static const struct inode_operations orangefs_file_inode_operations = {
|
|
.get_acl = orangefs_get_acl,
|
|
.set_acl = orangefs_set_acl,
|
|
.setattr = orangefs_setattr,
|
|
.getattr = orangefs_getattr,
|
|
.listxattr = orangefs_listxattr,
|
|
.permission = orangefs_permission,
|
|
.update_time = orangefs_update_time,
|
|
.fileattr_get = orangefs_fileattr_get,
|
|
.fileattr_set = orangefs_fileattr_set,
|
|
};
|
|
|
|
static int orangefs_init_iops(struct inode *inode)
|
|
{
|
|
inode->i_mapping->a_ops = &orangefs_address_operations;
|
|
|
|
switch (inode->i_mode & S_IFMT) {
|
|
case S_IFREG:
|
|
inode->i_op = &orangefs_file_inode_operations;
|
|
inode->i_fop = &orangefs_file_operations;
|
|
break;
|
|
case S_IFLNK:
|
|
inode->i_op = &orangefs_symlink_inode_operations;
|
|
break;
|
|
case S_IFDIR:
|
|
inode->i_op = &orangefs_dir_inode_operations;
|
|
inode->i_fop = &orangefs_dir_operations;
|
|
break;
|
|
default:
|
|
gossip_debug(GOSSIP_INODE_DEBUG,
|
|
"%s: unsupported mode\n",
|
|
__func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Given an ORANGEFS object identifier (fsid, handle), convert it into
|
|
* a ino_t type that will be used as a hash-index from where the handle will
|
|
* be searched for in the VFS hash table of inodes.
|
|
*/
|
|
static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
|
|
{
|
|
if (!ref)
|
|
return 0;
|
|
return orangefs_khandle_to_ino(&(ref->khandle));
|
|
}
|
|
|
|
/*
|
|
* Called to set up an inode from iget5_locked.
|
|
*/
|
|
static int orangefs_set_inode(struct inode *inode, void *data)
|
|
{
|
|
struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
|
|
ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
|
|
ORANGEFS_I(inode)->refn.khandle = ref->khandle;
|
|
ORANGEFS_I(inode)->attr_valid = 0;
|
|
hash_init(ORANGEFS_I(inode)->xattr_cache);
|
|
ORANGEFS_I(inode)->mapping_time = jiffies - 1;
|
|
ORANGEFS_I(inode)->bitlock = 0;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Called to determine if handles match.
|
|
*/
|
|
static int orangefs_test_inode(struct inode *inode, void *data)
|
|
{
|
|
struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
|
|
struct orangefs_inode_s *orangefs_inode = NULL;
|
|
|
|
orangefs_inode = ORANGEFS_I(inode);
|
|
/* test handles and fs_ids... */
|
|
return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle),
|
|
&(ref->khandle)) &&
|
|
orangefs_inode->refn.fs_id == ref->fs_id);
|
|
}
|
|
|
|
/*
|
|
* Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
|
|
* file handle.
|
|
*
|
|
* @sb: the file system super block instance.
|
|
* @ref: The ORANGEFS object for which we are trying to locate an inode.
|
|
*/
|
|
struct inode *orangefs_iget(struct super_block *sb,
|
|
struct orangefs_object_kref *ref)
|
|
{
|
|
struct inode *inode = NULL;
|
|
unsigned long hash;
|
|
int error;
|
|
|
|
hash = orangefs_handle_hash(ref);
|
|
inode = iget5_locked(sb,
|
|
hash,
|
|
orangefs_test_inode,
|
|
orangefs_set_inode,
|
|
ref);
|
|
|
|
if (!inode)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
if (!(inode->i_state & I_NEW))
|
|
return inode;
|
|
|
|
error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
|
|
if (error) {
|
|
iget_failed(inode);
|
|
return ERR_PTR(error);
|
|
}
|
|
|
|
inode->i_ino = hash; /* needed for stat etc */
|
|
orangefs_init_iops(inode);
|
|
unlock_new_inode(inode);
|
|
|
|
gossip_debug(GOSSIP_INODE_DEBUG,
|
|
"iget handle %pU, fsid %d hash %ld i_ino %lu\n",
|
|
&ref->khandle,
|
|
ref->fs_id,
|
|
hash,
|
|
inode->i_ino);
|
|
|
|
return inode;
|
|
}
|
|
|
|
/*
|
|
* Allocate an inode for a newly created file and insert it into the inode hash.
|
|
*/
|
|
struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir,
|
|
int mode, dev_t dev, struct orangefs_object_kref *ref)
|
|
{
|
|
unsigned long hash = orangefs_handle_hash(ref);
|
|
struct inode *inode;
|
|
int error;
|
|
|
|
gossip_debug(GOSSIP_INODE_DEBUG,
|
|
"%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n",
|
|
__func__,
|
|
sb,
|
|
MAJOR(dev),
|
|
MINOR(dev),
|
|
mode);
|
|
|
|
inode = new_inode(sb);
|
|
if (!inode)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
orangefs_set_inode(inode, ref);
|
|
inode->i_ino = hash; /* needed for stat etc */
|
|
|
|
error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
|
|
if (error)
|
|
goto out_iput;
|
|
|
|
orangefs_init_iops(inode);
|
|
inode->i_rdev = dev;
|
|
|
|
error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
|
|
if (error < 0)
|
|
goto out_iput;
|
|
|
|
gossip_debug(GOSSIP_INODE_DEBUG,
|
|
"Initializing ACL's for inode %pU\n",
|
|
get_khandle_from_ino(inode));
|
|
orangefs_init_acl(inode, dir);
|
|
return inode;
|
|
|
|
out_iput:
|
|
iput(inode);
|
|
return ERR_PTR(error);
|
|
}
|