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ceph: revert commit 22cddde104
commit 22cddde104 breaks the atomicity of write operation, it also
introduces a deadlock between write and truncate.
Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Greg Farnum <greg@inktank.com>
Conflicts:
fs/ceph/addr.c
This commit is contained in:
Sage Weil
parent
a8673d61ad
commit
7971bd92ba
@ -1067,51 +1067,23 @@ static int ceph_write_begin(struct file *file, struct address_space *mapping,
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struct page **pagep, void **fsdata)
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{
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struct inode *inode = file_inode(file);
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struct ceph_inode_info *ci = ceph_inode(inode);
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struct ceph_file_info *fi = file->private_data;
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struct page *page;
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pgoff_t index = pos >> PAGE_CACHE_SHIFT;
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int r, want, got = 0;
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if (fi->fmode & CEPH_FILE_MODE_LAZY)
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want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO;
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else
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want = CEPH_CAP_FILE_BUFFER;
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dout("write_begin %p %llx.%llx %llu~%u getting caps. i_size %llu\n",
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inode, ceph_vinop(inode), pos, len, inode->i_size);
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r = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, &got, pos+len);
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if (r < 0)
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return r;
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dout("write_begin %p %llx.%llx %llu~%u got cap refs on %s\n",
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inode, ceph_vinop(inode), pos, len, ceph_cap_string(got));
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if (!(got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO))) {
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ceph_put_cap_refs(ci, got);
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return -EAGAIN;
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}
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int r;
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do {
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/* get a page */
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page = grab_cache_page_write_begin(mapping, index, 0);
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if (!page) {
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r = -ENOMEM;
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break;
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}
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if (!page)
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return -ENOMEM;
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*pagep = page;
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dout("write_begin file %p inode %p page %p %d~%d\n", file,
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inode, page, (int)pos, (int)len);
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r = ceph_update_writeable_page(file, pos, len, page);
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if (r)
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page_cache_release(page);
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} while (r == -EAGAIN);
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if (r) {
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ceph_put_cap_refs(ci, got);
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} else {
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*pagep = page;
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*(int *)fsdata = got;
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}
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return r;
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}
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@ -1125,12 +1097,10 @@ static int ceph_write_end(struct file *file, struct address_space *mapping,
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struct page *page, void *fsdata)
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{
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struct inode *inode = file_inode(file);
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struct ceph_inode_info *ci = ceph_inode(inode);
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struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
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struct ceph_mds_client *mdsc = fsc->mdsc;
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unsigned from = pos & (PAGE_CACHE_SIZE - 1);
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int check_cap = 0;
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int got = (unsigned long)fsdata;
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dout("write_end file %p inode %p page %p %d~%d (%d)\n", file,
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inode, page, (int)pos, (int)copied, (int)len);
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@ -1153,19 +1123,6 @@ static int ceph_write_end(struct file *file, struct address_space *mapping,
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up_read(&mdsc->snap_rwsem);
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page_cache_release(page);
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if (copied > 0) {
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int dirty;
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spin_lock(&ci->i_ceph_lock);
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dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR);
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spin_unlock(&ci->i_ceph_lock);
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if (dirty)
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__mark_inode_dirty(inode, dirty);
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}
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dout("write_end %p %llx.%llx %llu~%u dropping cap refs on %s\n",
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inode, ceph_vinop(inode), pos, len, ceph_cap_string(got));
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ceph_put_cap_refs(ci, got);
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if (check_cap)
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ceph_check_caps(ceph_inode(inode), CHECK_CAPS_AUTHONLY, NULL);
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@ -718,53 +718,63 @@ static ssize_t ceph_aio_write(struct kiocb *iocb, const struct iovec *iov,
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struct ceph_osd_client *osdc =
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&ceph_sb_to_client(inode->i_sb)->client->osdc;
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loff_t endoff = pos + iov->iov_len;
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int got = 0;
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int ret, err, written;
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int want, got = 0;
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int ret, err;
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if (ceph_snap(inode) != CEPH_NOSNAP)
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return -EROFS;
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retry_snap:
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written = 0;
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if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL))
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return -ENOSPC;
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__ceph_do_pending_vmtruncate(inode);
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dout("aio_write %p %llx.%llx %llu~%u getting caps. i_size %llu\n",
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inode, ceph_vinop(inode), pos, (unsigned)iov->iov_len,
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inode->i_size);
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if (fi->fmode & CEPH_FILE_MODE_LAZY)
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want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO;
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else
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want = CEPH_CAP_FILE_BUFFER;
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ret = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, &got, endoff);
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if (ret < 0)
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goto out_put;
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dout("aio_write %p %llx.%llx %llu~%u got cap refs on %s\n",
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inode, ceph_vinop(inode), pos, (unsigned)iov->iov_len,
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ceph_cap_string(got));
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if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 ||
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(iocb->ki_filp->f_flags & O_DIRECT) ||
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(inode->i_sb->s_flags & MS_SYNCHRONOUS) ||
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(fi->flags & CEPH_F_SYNC)) {
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ret = ceph_sync_write(file, iov->iov_base, iov->iov_len,
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&iocb->ki_pos);
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} else {
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/*
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* buffered write; drop Fw early to avoid slow
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* revocation if we get stuck on balance_dirty_pages
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*/
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int dirty;
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spin_lock(&ci->i_ceph_lock);
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dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR);
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spin_unlock(&ci->i_ceph_lock);
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ceph_put_cap_refs(ci, got);
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/*
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* try to do a buffered write. if we don't have sufficient
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* caps, we'll get -EAGAIN from generic_file_aio_write, or a
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* short write if we only get caps for some pages.
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*/
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if (!(iocb->ki_filp->f_flags & O_DIRECT) &&
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!(inode->i_sb->s_flags & MS_SYNCHRONOUS) &&
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!(fi->flags & CEPH_F_SYNC)) {
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ret = generic_file_aio_write(iocb, iov, nr_segs, pos);
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if (ret >= 0)
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written = ret;
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if ((ret >= 0 || ret == -EIOCBQUEUED) &&
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((file->f_flags & O_SYNC) || IS_SYNC(file->f_mapping->host)
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|| ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_NEARFULL))) {
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err = vfs_fsync_range(file, pos, pos + written - 1, 1);
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err = vfs_fsync_range(file, pos, pos + ret - 1, 1);
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if (err < 0)
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ret = err;
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}
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if ((ret < 0 && ret != -EAGAIN) || pos + written >= endoff)
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goto out;
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if (dirty)
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__mark_inode_dirty(inode, dirty);
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goto out;
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}
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dout("aio_write %p %llx.%llx %llu~%u getting caps. i_size %llu\n",
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inode, ceph_vinop(inode), pos + written,
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(unsigned)iov->iov_len - written, inode->i_size);
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ret = ceph_get_caps(ci, CEPH_CAP_FILE_WR, 0, &got, endoff);
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if (ret < 0)
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goto out;
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dout("aio_write %p %llx.%llx %llu~%u got cap refs on %s\n",
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inode, ceph_vinop(inode), pos + written,
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(unsigned)iov->iov_len - written, ceph_cap_string(got));
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ret = ceph_sync_write(file, iov->iov_base + written,
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iov->iov_len - written, &iocb->ki_pos);
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if (ret >= 0) {
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int dirty;
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spin_lock(&ci->i_ceph_lock);
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@ -773,10 +783,13 @@ retry_snap:
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if (dirty)
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__mark_inode_dirty(inode, dirty);
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}
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out_put:
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dout("aio_write %p %llx.%llx %llu~%u dropping cap refs on %s\n",
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inode, ceph_vinop(inode), pos + written,
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(unsigned)iov->iov_len - written, ceph_cap_string(got));
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inode, ceph_vinop(inode), pos, (unsigned)iov->iov_len,
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ceph_cap_string(got));
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ceph_put_cap_refs(ci, got);
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out:
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if (ret == -EOLDSNAPC) {
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dout("aio_write %p %llx.%llx %llu~%u got EOLDSNAPC, retrying\n",
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@ -1916,6 +1916,7 @@ static void __wake_requests(struct ceph_mds_client *mdsc,
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req = list_entry(tmp_list.next,
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struct ceph_mds_request, r_wait);
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list_del_init(&req->r_wait);
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dout(" wake request %p tid %llu\n", req, req->r_tid);
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__do_request(mdsc, req);
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}
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}
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