const struct inode_operations cifs_symlink_inode_ops = {
.get_link = cifs_get_link,
+ .setattr = cifs_setattr,
.permission = cifs_permission,
.listxattr = cifs_listxattr,
};
+/*
+ * Advance the EOF marker to after the source range.
+ */
+static int cifs_precopy_set_eof(struct inode *src_inode, struct cifsInodeInfo *src_cifsi,
+ struct cifs_tcon *src_tcon,
+ unsigned int xid, loff_t src_end)
+{
+ struct cifsFileInfo *writeable_srcfile;
+ int rc = -EINVAL;
+
+ writeable_srcfile = find_writable_file(src_cifsi, FIND_WR_FSUID_ONLY);
+ if (writeable_srcfile) {
+ if (src_tcon->ses->server->ops->set_file_size)
+ rc = src_tcon->ses->server->ops->set_file_size(
+ xid, src_tcon, writeable_srcfile,
+ src_inode->i_size, true /* no need to set sparse */);
+ else
+ rc = -ENOSYS;
+ cifsFileInfo_put(writeable_srcfile);
+ cifs_dbg(FYI, "SetFSize for copychunk rc = %d\n", rc);
+ }
+
+ if (rc < 0)
+ goto set_failed;
+
+ netfs_resize_file(&src_cifsi->netfs, src_end);
+ fscache_resize_cookie(cifs_inode_cookie(src_inode), src_end);
+ return 0;
+
+set_failed:
+ return filemap_write_and_wait(src_inode->i_mapping);
+}
+
+/*
+ * Flush out either the folio that overlaps the beginning of a range in which
+ * pos resides or the folio that overlaps the end of a range unless that folio
+ * is entirely within the range we're going to invalidate. We extend the flush
+ * bounds to encompass the folio.
+ */
+static int cifs_flush_folio(struct inode *inode, loff_t pos, loff_t *_fstart, loff_t *_fend,
+ bool first)
+{
+ struct folio *folio;
+ unsigned long long fpos, fend;
+ pgoff_t index = pos / PAGE_SIZE;
+ size_t size;
+ int rc = 0;
+
+ folio = filemap_get_folio(inode->i_mapping, index);
+ if (IS_ERR(folio))
+ return 0;
+
+ size = folio_size(folio);
+ fpos = folio_pos(folio);
+ fend = fpos + size - 1;
+ *_fstart = min_t(unsigned long long, *_fstart, fpos);
+ *_fend = max_t(unsigned long long, *_fend, fend);
+ if ((first && pos == fpos) || (!first && pos == fend))
+ goto out;
+
+ rc = filemap_write_and_wait_range(inode->i_mapping, fpos, fend);
+out:
+ folio_put(folio);
+ return rc;
+}
+
static loff_t cifs_remap_file_range(struct file *src_file, loff_t off,
struct file *dst_file, loff_t destoff, loff_t len,
unsigned int remap_flags)
{
struct inode *src_inode = file_inode(src_file);
struct inode *target_inode = file_inode(dst_file);
+ struct cifsInodeInfo *src_cifsi = CIFS_I(src_inode);
+ struct cifsInodeInfo *target_cifsi = CIFS_I(target_inode);
struct cifsFileInfo *smb_file_src = src_file->private_data;
- struct cifsFileInfo *smb_file_target;
- struct cifs_tcon *target_tcon;
+ struct cifsFileInfo *smb_file_target = dst_file->private_data;
+ struct cifs_tcon *target_tcon, *src_tcon;
+ unsigned long long destend, fstart, fend, new_size;
unsigned int xid;
int rc;
- if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY))
+ if (remap_flags & REMAP_FILE_DEDUP)
+ return -EOPNOTSUPP;
+ if (remap_flags & ~REMAP_FILE_ADVISORY)
return -EINVAL;
cifs_dbg(FYI, "clone range\n");
xid = get_xid();
- if (!src_file->private_data || !dst_file->private_data) {
+ if (!smb_file_src || !smb_file_target) {
rc = -EBADF;
cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
goto out;
}
- smb_file_target = dst_file->private_data;
+ src_tcon = tlink_tcon(smb_file_src->tlink);
target_tcon = tlink_tcon(smb_file_target->tlink);
/*
if (len == 0)
len = src_inode->i_size - off;
- cifs_dbg(FYI, "about to flush pages\n");
- /* should we flush first and last page first */
- truncate_inode_pages_range(&target_inode->i_data, destoff,
- PAGE_ALIGN(destoff + len)-1);
+ cifs_dbg(FYI, "clone range\n");
+
+ /* Flush the source buffer */
+ rc = filemap_write_and_wait_range(src_inode->i_mapping, off,
+ off + len - 1);
+ if (rc)
+ goto unlock;
+
+ /* The server-side copy will fail if the source crosses the EOF marker.
+ * Advance the EOF marker after the flush above to the end of the range
+ * if it's short of that.
+ */
+ if (src_cifsi->netfs.remote_i_size < off + len) {
+ rc = cifs_precopy_set_eof(src_inode, src_cifsi, src_tcon, xid, off + len);
+ if (rc < 0)
+ goto unlock;
+ }
+
+ new_size = destoff + len;
+ destend = destoff + len - 1;
+
+ /* Flush the folios at either end of the destination range to prevent
+ * accidental loss of dirty data outside of the range.
+ */
+ fstart = destoff;
+ fend = destend;
- if (target_tcon->ses->server->ops->duplicate_extents)
+ rc = cifs_flush_folio(target_inode, destoff, &fstart, &fend, true);
+ if (rc)
+ goto unlock;
+ rc = cifs_flush_folio(target_inode, destend, &fstart, &fend, false);
+ if (rc)
+ goto unlock;
+
+ /* Discard all the folios that overlap the destination region. */
+ cifs_dbg(FYI, "about to discard pages %llx-%llx\n", fstart, fend);
+ truncate_inode_pages_range(&target_inode->i_data, fstart, fend);
+
+ fscache_invalidate(cifs_inode_cookie(target_inode), NULL,
+ i_size_read(target_inode), 0);
+
+ rc = -EOPNOTSUPP;
+ if (target_tcon->ses->server->ops->duplicate_extents) {
rc = target_tcon->ses->server->ops->duplicate_extents(xid,
smb_file_src, smb_file_target, off, len, destoff);
- else
- rc = -EOPNOTSUPP;
+ if (rc == 0 && new_size > i_size_read(target_inode)) {
+ truncate_setsize(target_inode, new_size);
+ netfs_resize_file(&target_cifsi->netfs, new_size);
+ fscache_resize_cookie(cifs_inode_cookie(target_inode),
+ new_size);
+ }
+ }
/* force revalidate of size and timestamps of target file now
that target is updated on the server */
CIFS_I(target_inode)->time = 0;
+unlock:
/* although unlocking in the reverse order from locking is not
strictly necessary here it is a little cleaner to be consistent */
unlock_two_nondirectories(src_inode, target_inode);
{
struct inode *src_inode = file_inode(src_file);
struct inode *target_inode = file_inode(dst_file);
+ struct cifsInodeInfo *src_cifsi = CIFS_I(src_inode);
struct cifsFileInfo *smb_file_src;
struct cifsFileInfo *smb_file_target;
struct cifs_tcon *src_tcon;
struct cifs_tcon *target_tcon;
+ unsigned long long destend, fstart, fend;
ssize_t rc;
cifs_dbg(FYI, "copychunk range\n");
if (rc)
goto unlock;
- /* should we flush first and last page first */
- truncate_inode_pages(&target_inode->i_data, 0);
+ /* The server-side copy will fail if the source crosses the EOF marker.
+ * Advance the EOF marker after the flush above to the end of the range
+ * if it's short of that.
+ */
+ if (src_cifsi->server_eof < off + len) {
+ rc = cifs_precopy_set_eof(src_inode, src_cifsi, src_tcon, xid, off + len);
+ if (rc < 0)
+ goto unlock;
+ }
+
+ destend = destoff + len - 1;
+
+ /* Flush the folios at either end of the destination range to prevent
+ * accidental loss of dirty data outside of the range.
+ */
+ fstart = destoff;
+ fend = destend;
+
+ rc = cifs_flush_folio(target_inode, destoff, &fstart, &fend, true);
+ if (rc)
+ goto unlock;
+ rc = cifs_flush_folio(target_inode, destend, &fstart, &fend, false);
+ if (rc)
+ goto unlock;
+
+ /* Discard all the folios that overlap the destination region. */
+ truncate_inode_pages_range(&target_inode->i_data, fstart, fend);
rc = file_modified(dst_file);
- if (!rc)
+ if (!rc) {
rc = target_tcon->ses->server->ops->copychunk_range(xid,
smb_file_src, smb_file_target, off, len, destoff);
+ if (rc > 0 && destoff + rc > i_size_read(target_inode))
+ truncate_setsize(target_inode, destoff + rc);
+ }
file_accessed(src_file);
projects / platform / kernel / linux-starfive.git / blobdiff