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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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ceph: re-org copy_file_range and fix some error paths
This patch re-organizes copy_file_range, trying to fix a few issues in the error handling. Here's the summary: - Abort copy if initial do_splice_direct() returns fewer bytes than requested. - Move the 'size' initialization (with i_size_read()) further down in the code, after the initial call to do_splice_direct(). This avoids issues with a possibly stale value if a manual copy is done. - Move the object copy loop into a separate function. This makes it easier to handle errors (e.g, dirtying caps and updating the MDS metadata if only some objects have been copied before an error has occurred). - Added calls to ceph_oloc_destroy() to avoid leaking memory with src_oloc and dst_oloc - After the object copy loop, the new file size to be reported to the MDS (if there's file size change) is now the actual file size, and not the size after an eventual extra manual copy. - Added a few dout() to show the number of bytes copied in the two manual copies and in the object copy loop. Signed-off-by: Luis Henriques <lhenriques@suse.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Luis Henriques
Ilya Dryomov
parent
058daab79d
commit
1b0c3b9f91
167
fs/ceph/file.c
167
fs/ceph/file.c
@ -1944,6 +1944,71 @@ static int is_file_size_ok(struct inode *src_inode, struct inode *dst_inode,
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return 0;
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}
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static ssize_t ceph_do_objects_copy(struct ceph_inode_info *src_ci, u64 *src_off,
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struct ceph_inode_info *dst_ci, u64 *dst_off,
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struct ceph_fs_client *fsc,
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size_t len, unsigned int flags)
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{
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struct ceph_object_locator src_oloc, dst_oloc;
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struct ceph_object_id src_oid, dst_oid;
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size_t bytes = 0;
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u64 src_objnum, src_objoff, dst_objnum, dst_objoff;
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u32 src_objlen, dst_objlen;
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u32 object_size = src_ci->i_layout.object_size;
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int ret;
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src_oloc.pool = src_ci->i_layout.pool_id;
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src_oloc.pool_ns = ceph_try_get_string(src_ci->i_layout.pool_ns);
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dst_oloc.pool = dst_ci->i_layout.pool_id;
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dst_oloc.pool_ns = ceph_try_get_string(dst_ci->i_layout.pool_ns);
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while (len >= object_size) {
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ceph_calc_file_object_mapping(&src_ci->i_layout, *src_off,
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object_size, &src_objnum,
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&src_objoff, &src_objlen);
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ceph_calc_file_object_mapping(&dst_ci->i_layout, *dst_off,
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object_size, &dst_objnum,
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&dst_objoff, &dst_objlen);
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ceph_oid_init(&src_oid);
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ceph_oid_printf(&src_oid, "%llx.%08llx",
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src_ci->i_vino.ino, src_objnum);
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ceph_oid_init(&dst_oid);
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ceph_oid_printf(&dst_oid, "%llx.%08llx",
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dst_ci->i_vino.ino, dst_objnum);
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/* Do an object remote copy */
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ret = ceph_osdc_copy_from(&fsc->client->osdc,
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src_ci->i_vino.snap, 0,
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&src_oid, &src_oloc,
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CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL |
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CEPH_OSD_OP_FLAG_FADVISE_NOCACHE,
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&dst_oid, &dst_oloc,
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CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL |
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CEPH_OSD_OP_FLAG_FADVISE_DONTNEED,
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dst_ci->i_truncate_seq,
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dst_ci->i_truncate_size,
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CEPH_OSD_COPY_FROM_FLAG_TRUNCATE_SEQ);
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if (ret) {
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if (ret == -EOPNOTSUPP) {
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fsc->have_copy_from2 = false;
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pr_notice("OSDs don't support copy-from2; disabling copy offload\n");
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}
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dout("ceph_osdc_copy_from returned %d\n", ret);
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if (!bytes)
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bytes = ret;
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goto out;
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}
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len -= object_size;
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bytes += object_size;
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*src_off += object_size;
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*dst_off += object_size;
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}
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out:
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ceph_oloc_destroy(&src_oloc);
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ceph_oloc_destroy(&dst_oloc);
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return bytes;
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}
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static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off,
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struct file *dst_file, loff_t dst_off,
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size_t len, unsigned int flags)
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@ -1954,14 +2019,11 @@ static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off,
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struct ceph_inode_info *dst_ci = ceph_inode(dst_inode);
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struct ceph_cap_flush *prealloc_cf;
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struct ceph_fs_client *src_fsc = ceph_inode_to_client(src_inode);
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struct ceph_object_locator src_oloc, dst_oloc;
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struct ceph_object_id src_oid, dst_oid;
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loff_t endoff = 0, size;
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ssize_t ret = -EIO;
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loff_t size;
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ssize_t ret = -EIO, bytes;
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u64 src_objnum, dst_objnum, src_objoff, dst_objoff;
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u32 src_objlen, dst_objlen, object_size;
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u32 src_objlen, dst_objlen;
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int src_got = 0, dst_got = 0, err, dirty;
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bool do_final_copy = false;
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if (src_inode->i_sb != dst_inode->i_sb) {
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struct ceph_fs_client *dst_fsc = ceph_inode_to_client(dst_inode);
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@ -2039,22 +2101,14 @@ static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off,
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if (ret < 0)
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goto out_caps;
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size = i_size_read(dst_inode);
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endoff = dst_off + len;
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/* Drop dst file cached pages */
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ret = invalidate_inode_pages2_range(dst_inode->i_mapping,
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dst_off >> PAGE_SHIFT,
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endoff >> PAGE_SHIFT);
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(dst_off + len) >> PAGE_SHIFT);
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if (ret < 0) {
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dout("Failed to invalidate inode pages (%zd)\n", ret);
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ret = 0; /* XXX */
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}
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src_oloc.pool = src_ci->i_layout.pool_id;
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src_oloc.pool_ns = ceph_try_get_string(src_ci->i_layout.pool_ns);
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dst_oloc.pool = dst_ci->i_layout.pool_id;
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dst_oloc.pool_ns = ceph_try_get_string(dst_ci->i_layout.pool_ns);
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ceph_calc_file_object_mapping(&src_ci->i_layout, src_off,
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src_ci->i_layout.object_size,
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&src_objnum, &src_objoff, &src_objlen);
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@ -2073,6 +2127,8 @@ static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off,
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* starting at the src_off
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*/
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if (src_objoff) {
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dout("Initial partial copy of %u bytes\n", src_objlen);
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/*
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* we need to temporarily drop all caps as we'll be calling
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* {read,write}_iter, which will get caps again.
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@ -2080,8 +2136,9 @@ static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off,
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put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got);
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ret = do_splice_direct(src_file, &src_off, dst_file,
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&dst_off, src_objlen, flags);
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if (ret < 0) {
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dout("do_splice_direct returned %d\n", err);
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/* Abort on short copies or on error */
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if (ret < src_objlen) {
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dout("Failed partial copy (%zd)\n", ret);
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goto out;
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}
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len -= ret;
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@ -2094,62 +2151,29 @@ static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off,
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if (err < 0)
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goto out_caps;
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}
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object_size = src_ci->i_layout.object_size;
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while (len >= object_size) {
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ceph_calc_file_object_mapping(&src_ci->i_layout, src_off,
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object_size, &src_objnum,
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&src_objoff, &src_objlen);
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ceph_calc_file_object_mapping(&dst_ci->i_layout, dst_off,
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object_size, &dst_objnum,
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&dst_objoff, &dst_objlen);
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ceph_oid_init(&src_oid);
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ceph_oid_printf(&src_oid, "%llx.%08llx",
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src_ci->i_vino.ino, src_objnum);
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ceph_oid_init(&dst_oid);
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ceph_oid_printf(&dst_oid, "%llx.%08llx",
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dst_ci->i_vino.ino, dst_objnum);
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/* Do an object remote copy */
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err = ceph_osdc_copy_from(
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&src_fsc->client->osdc,
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src_ci->i_vino.snap, 0,
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&src_oid, &src_oloc,
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CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL |
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CEPH_OSD_OP_FLAG_FADVISE_NOCACHE,
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&dst_oid, &dst_oloc,
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CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL |
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CEPH_OSD_OP_FLAG_FADVISE_DONTNEED,
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dst_ci->i_truncate_seq, dst_ci->i_truncate_size,
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CEPH_OSD_COPY_FROM_FLAG_TRUNCATE_SEQ);
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if (err) {
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if (err == -EOPNOTSUPP) {
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src_fsc->have_copy_from2 = false;
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pr_notice("OSDs don't support copy-from2; disabling copy offload\n");
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}
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dout("ceph_osdc_copy_from returned %d\n", err);
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size = i_size_read(dst_inode);
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bytes = ceph_do_objects_copy(src_ci, &src_off, dst_ci, &dst_off,
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src_fsc, len, flags);
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if (bytes <= 0) {
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if (!ret)
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ret = err;
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ret = bytes;
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goto out_caps;
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}
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len -= object_size;
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src_off += object_size;
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dst_off += object_size;
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ret += object_size;
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}
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if (len)
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/* We still need one final local copy */
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do_final_copy = true;
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dout("Copied %zu bytes out of %zu\n", bytes, len);
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len -= bytes;
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ret += bytes;
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file_update_time(dst_file);
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inode_inc_iversion_raw(dst_inode);
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if (endoff > size) {
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if (dst_off > size) {
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int caps_flags = 0;
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/* Let the MDS know about dst file size change */
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if (ceph_quota_is_max_bytes_approaching(dst_inode, endoff))
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if (ceph_quota_is_max_bytes_approaching(dst_inode, dst_off))
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caps_flags |= CHECK_CAPS_NODELAY;
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if (ceph_inode_set_size(dst_inode, endoff))
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if (ceph_inode_set_size(dst_inode, dst_off))
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caps_flags |= CHECK_CAPS_AUTHONLY;
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if (caps_flags)
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ceph_check_caps(dst_ci, caps_flags, NULL);
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@ -2165,15 +2189,18 @@ static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off,
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out_caps:
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put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got);
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if (do_final_copy) {
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err = do_splice_direct(src_file, &src_off, dst_file,
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/*
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* Do the final manual copy if we still have some bytes left, unless
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* there were errors in remote object copies (len >= object_size).
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*/
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if (len && (len < src_ci->i_layout.object_size)) {
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dout("Final partial copy of %zu bytes\n", len);
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bytes = do_splice_direct(src_file, &src_off, dst_file,
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&dst_off, len, flags);
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if (err < 0) {
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dout("do_splice_direct returned %d\n", err);
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goto out;
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}
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len -= err;
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ret += err;
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if (bytes > 0)
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ret += bytes;
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else
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dout("Failed partial copy (%zd)\n", bytes);
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}
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out:
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