mirror of https://gitee.com/openkylin/linux.git
ceph: switch to ->write_iter()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
parent
64c3131161
commit
4908b822b3
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@ -531,8 +531,7 @@ static void ceph_sync_write_unsafe(struct ceph_osd_request *req, bool unsafe)
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* objects, rollback on failure, etc.)
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*/
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static ssize_t
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ceph_sync_direct_write(struct kiocb *iocb, const struct iovec *iov,
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unsigned long nr_segs, size_t count)
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ceph_sync_direct_write(struct kiocb *iocb, struct iov_iter *from)
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{
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struct file *file = iocb->ki_filp;
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struct inode *inode = file_inode(file);
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@ -549,7 +548,7 @@ ceph_sync_direct_write(struct kiocb *iocb, const struct iovec *iov,
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int ret;
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struct timespec mtime = CURRENT_TIME;
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loff_t pos = iocb->ki_pos;
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struct iov_iter i;
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size_t count = iov_iter_count(from);
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if (ceph_snap(file_inode(file)) != CEPH_NOSNAP)
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return -EROFS;
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@ -571,10 +570,8 @@ ceph_sync_direct_write(struct kiocb *iocb, const struct iovec *iov,
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CEPH_OSD_FLAG_ONDISK |
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CEPH_OSD_FLAG_WRITE;
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iov_iter_init(&i, WRITE, iov, nr_segs, count);
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while (iov_iter_count(&i) > 0) {
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u64 len = iov_iter_single_seg_count(&i);
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while (iov_iter_count(from) > 0) {
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u64 len = iov_iter_single_seg_count(from);
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size_t start;
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ssize_t n;
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@ -592,7 +589,7 @@ ceph_sync_direct_write(struct kiocb *iocb, const struct iovec *iov,
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break;
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}
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n = iov_iter_get_pages_alloc(&i, &pages, len, &start);
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n = iov_iter_get_pages_alloc(from, &pages, len, &start);
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if (unlikely(n < 0)) {
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ret = n;
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ceph_osdc_put_request(req);
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@ -623,7 +620,7 @@ ceph_sync_direct_write(struct kiocb *iocb, const struct iovec *iov,
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break;
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pos += n;
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written += n;
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iov_iter_advance(&i, n);
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iov_iter_advance(from, n);
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if (pos > i_size_read(inode)) {
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check_caps = ceph_inode_set_size(inode, pos);
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@ -649,8 +646,7 @@ ceph_sync_direct_write(struct kiocb *iocb, const struct iovec *iov,
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* correct atomic write, we should e.g. take write locks on all
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* objects, rollback on failure, etc.)
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*/
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static ssize_t ceph_sync_write(struct kiocb *iocb, const struct iovec *iov,
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unsigned long nr_segs, size_t count)
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static ssize_t ceph_sync_write(struct kiocb *iocb, struct iov_iter *from)
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{
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struct file *file = iocb->ki_filp;
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struct inode *inode = file_inode(file);
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@ -668,7 +664,7 @@ static ssize_t ceph_sync_write(struct kiocb *iocb, const struct iovec *iov,
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int ret;
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struct timespec mtime = CURRENT_TIME;
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loff_t pos = iocb->ki_pos;
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struct iov_iter i;
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size_t count = iov_iter_count(from);
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if (ceph_snap(file_inode(file)) != CEPH_NOSNAP)
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return -EROFS;
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@ -690,9 +686,7 @@ static ssize_t ceph_sync_write(struct kiocb *iocb, const struct iovec *iov,
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CEPH_OSD_FLAG_WRITE |
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CEPH_OSD_FLAG_ACK;
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iov_iter_init(&i, WRITE, iov, nr_segs, count);
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while ((len = iov_iter_count(&i)) > 0) {
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while ((len = iov_iter_count(from)) > 0) {
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size_t left;
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int n;
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@ -724,7 +718,7 @@ static ssize_t ceph_sync_write(struct kiocb *iocb, const struct iovec *iov,
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left = len;
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for (n = 0; n < num_pages; n++) {
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size_t plen = min_t(size_t, left, PAGE_SIZE);
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ret = copy_page_from_iter(pages[n], 0, plen, &i);
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ret = copy_page_from_iter(pages[n], 0, plen, from);
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if (ret != plen) {
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ret = -EFAULT;
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break;
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@ -861,8 +855,7 @@ static ssize_t ceph_read_iter(struct kiocb *iocb, struct iov_iter *to)
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*
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* If we are near ENOSPC, write synchronously.
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*/
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static ssize_t ceph_aio_write(struct kiocb *iocb, const struct iovec *iov,
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unsigned long nr_segs, loff_t pos)
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static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
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{
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struct file *file = iocb->ki_filp;
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struct ceph_file_info *fi = file->private_data;
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@ -870,16 +863,15 @@ static ssize_t ceph_aio_write(struct kiocb *iocb, const struct iovec *iov,
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struct ceph_inode_info *ci = ceph_inode(inode);
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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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ssize_t count, written = 0;
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ssize_t count = iov_iter_count(from), written = 0;
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int err, want, got;
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loff_t pos = iocb->ki_pos;
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if (ceph_snap(inode) != CEPH_NOSNAP)
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return -EROFS;
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mutex_lock(&inode->i_mutex);
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count = iov_length(iov, nr_segs);
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/* We can write back this queue in page reclaim */
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current->backing_dev_info = file->f_mapping->backing_dev_info;
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@ -889,6 +881,7 @@ static ssize_t ceph_aio_write(struct kiocb *iocb, const struct iovec *iov,
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if (count == 0)
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goto out;
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iov_iter_truncate(from, count);
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err = file_remove_suid(file);
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if (err)
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@ -920,23 +913,26 @@ static ssize_t ceph_aio_write(struct kiocb *iocb, const struct iovec *iov,
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if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 ||
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(file->f_flags & O_DIRECT) || (fi->flags & CEPH_F_SYNC)) {
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struct iov_iter data;
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mutex_unlock(&inode->i_mutex);
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/* we might need to revert back to that point */
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data = *from;
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if (file->f_flags & O_DIRECT)
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written = ceph_sync_direct_write(iocb, iov,
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nr_segs, count);
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written = ceph_sync_direct_write(iocb, &data);
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else
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written = ceph_sync_write(iocb, iov, nr_segs, count);
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written = ceph_sync_write(iocb, &data);
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if (written == -EOLDSNAPC) {
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dout("aio_write %p %llx.%llx %llu~%u"
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"got EOLDSNAPC, retrying\n",
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inode, ceph_vinop(inode),
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pos, (unsigned)iov->iov_len);
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pos, (unsigned)count);
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mutex_lock(&inode->i_mutex);
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goto retry_snap;
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}
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if (written > 0)
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iov_iter_advance(from, written);
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} else {
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loff_t old_size = inode->i_size;
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struct iov_iter from;
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/*
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* No need to acquire the i_truncate_mutex. Because
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* the MDS revokes Fwb caps before sending truncate
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@ -944,8 +940,7 @@ static ssize_t ceph_aio_write(struct kiocb *iocb, const struct iovec *iov,
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* are pending vmtruncate. So write and vmtruncate
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* can not run at the same time
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*/
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iov_iter_init(&from, WRITE, iov, nr_segs, count);
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written = generic_perform_write(file, &from, pos);
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written = generic_perform_write(file, from, pos);
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if (likely(written >= 0))
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iocb->ki_pos = pos + written;
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if (inode->i_size > old_size)
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@ -963,7 +958,7 @@ static ssize_t ceph_aio_write(struct kiocb *iocb, const struct iovec *iov,
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}
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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, (unsigned)iov->iov_len,
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inode, ceph_vinop(inode), pos, (unsigned)count,
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ceph_cap_string(got));
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ceph_put_cap_refs(ci, got);
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@ -1241,9 +1236,9 @@ const struct file_operations ceph_file_fops = {
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.release = ceph_release,
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.llseek = ceph_llseek,
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.read = new_sync_read,
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.write = do_sync_write,
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.write = new_sync_write,
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.read_iter = ceph_read_iter,
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.aio_write = ceph_aio_write,
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.write_iter = ceph_write_iter,
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.mmap = ceph_mmap,
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.fsync = ceph_fsync,
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.lock = ceph_lock,
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