--- zzzz-none-000/linux-3.10.107/fs/cifs/ioctl.c 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/fs/cifs/ioctl.c 2021-02-04 17:41:59.000000000 +0000 @@ -3,7 +3,7 @@ * * vfs operations that deal with io control * - * Copyright (C) International Business Machines Corp., 2005,2007 + * Copyright (C) International Business Machines Corp., 2005,2013 * Author(s): Steve French (sfrench@us.ibm.com) * * This library is free software; you can redistribute it and/or modify @@ -22,11 +22,163 @@ */ #include +#include +#include +#include +#include #include "cifspdu.h" #include "cifsglob.h" #include "cifsproto.h" #include "cifs_debug.h" #include "cifsfs.h" +#include "cifs_ioctl.h" +#include + +static long cifs_ioctl_clone(unsigned int xid, struct file *dst_file, + unsigned long srcfd, u64 off, u64 len, u64 destoff, + bool dup_extents) +{ + int rc; + struct cifsFileInfo *smb_file_target = dst_file->private_data; + struct inode *target_inode = file_inode(dst_file); + struct cifs_tcon *target_tcon; + struct fd src_file; + struct cifsFileInfo *smb_file_src; + struct inode *src_inode; + struct cifs_tcon *src_tcon; + + cifs_dbg(FYI, "ioctl clone range\n"); + /* the destination must be opened for writing */ + if (!(dst_file->f_mode & FMODE_WRITE)) { + cifs_dbg(FYI, "file target not open for write\n"); + return -EINVAL; + } + + /* check if target volume is readonly and take reference */ + rc = mnt_want_write_file(dst_file); + if (rc) { + cifs_dbg(FYI, "mnt_want_write failed with rc %d\n", rc); + return rc; + } + + src_file = fdget(srcfd); + if (!src_file.file) { + rc = -EBADF; + goto out_drop_write; + } + + if (src_file.file->f_op->unlocked_ioctl != cifs_ioctl) { + rc = -EBADF; + cifs_dbg(VFS, "src file seems to be from a different filesystem type\n"); + goto out_fput; + } + + if ((!src_file.file->private_data) || (!dst_file->private_data)) { + rc = -EBADF; + cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n"); + goto out_fput; + } + + rc = -EXDEV; + smb_file_target = dst_file->private_data; + smb_file_src = src_file.file->private_data; + src_tcon = tlink_tcon(smb_file_src->tlink); + target_tcon = tlink_tcon(smb_file_target->tlink); + + /* check source and target on same server (or volume if dup_extents) */ + if (dup_extents && (src_tcon != target_tcon)) { + cifs_dbg(VFS, "source and target of copy not on same share\n"); + goto out_fput; + } + + if (!dup_extents && (src_tcon->ses != target_tcon->ses)) { + cifs_dbg(VFS, "source and target of copy not on same server\n"); + goto out_fput; + } + + src_inode = file_inode(src_file.file); + rc = -EINVAL; + if (S_ISDIR(src_inode->i_mode)) + goto out_fput; + + /* + * Note: cifs case is easier than btrfs since server responsible for + * checks for proper open modes and file type and if it wants + * server could even support copy of range where source = target + */ + lock_two_nondirectories(target_inode, src_inode); + + /* determine range to clone */ + rc = -EINVAL; + if (off + len > src_inode->i_size || off + len < off) + goto out_unlock; + 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_CACHE_ALIGN(destoff + len)-1); + + if (dup_extents && 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 if (!dup_extents && target_tcon->ses->server->ops->clone_range) + rc = target_tcon->ses->server->ops->clone_range(xid, + smb_file_src, smb_file_target, off, len, destoff); + else + rc = -EOPNOTSUPP; + + /* force revalidate of size and timestamps of target file now + that target is updated on the server */ + CIFS_I(target_inode)->time = 0; +out_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); +out_fput: + fdput(src_file); +out_drop_write: + mnt_drop_write_file(dst_file); + return rc; +} + +static long smb_mnt_get_fsinfo(unsigned int xid, struct cifs_tcon *tcon, + void __user *arg) +{ + int rc = 0; + struct smb_mnt_fs_info *fsinf; + + fsinf = kzalloc(sizeof(struct smb_mnt_fs_info), GFP_KERNEL); + if (fsinf == NULL) + return -ENOMEM; + + fsinf->version = 1; + fsinf->protocol_id = tcon->ses->server->vals->protocol_id; + fsinf->device_characteristics = + le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics); + fsinf->device_type = le32_to_cpu(tcon->fsDevInfo.DeviceType); + fsinf->fs_attributes = le32_to_cpu(tcon->fsAttrInfo.Attributes); + fsinf->max_path_component = + le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength); +#ifdef CONFIG_CIFS_SMB2 + fsinf->vol_serial_number = tcon->vol_serial_number; + fsinf->vol_create_time = le64_to_cpu(tcon->vol_create_time); + fsinf->share_flags = tcon->share_flags; + fsinf->share_caps = le32_to_cpu(tcon->capabilities); + fsinf->sector_flags = tcon->ss_flags; + fsinf->optimal_sector_size = tcon->perf_sector_size; + fsinf->max_bytes_chunk = tcon->max_bytes_chunk; + fsinf->maximal_access = tcon->maximal_access; +#endif /* SMB2 */ + fsinf->cifs_posix_caps = le64_to_cpu(tcon->fsUnixInfo.Capability); + + if (copy_to_user(arg, fsinf, sizeof(struct smb_mnt_fs_info))) + rc = -EFAULT; + + kfree(fsinf); + return rc; +} long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) { @@ -34,28 +186,24 @@ int rc = -ENOTTY; /* strange error - but the precedent */ unsigned int xid; struct cifs_sb_info *cifs_sb; -#ifdef CONFIG_CIFS_POSIX struct cifsFileInfo *pSMBFile = filep->private_data; struct cifs_tcon *tcon; __u64 ExtAttrBits = 0; - __u64 ExtAttrMask = 0; __u64 caps; -#endif /* CONFIG_CIFS_POSIX */ xid = get_xid(); - cifs_dbg(FYI, "ioctl file %p cmd %u arg %lu\n", filep, command, arg); - cifs_sb = CIFS_SB(inode->i_sb); switch (command) { -#ifdef CONFIG_CIFS_POSIX case FS_IOC_GETFLAGS: if (pSMBFile == NULL) break; tcon = tlink_tcon(pSMBFile->tlink); caps = le64_to_cpu(tcon->fsUnixInfo.Capability); +#ifdef CONFIG_CIFS_POSIX if (CIFS_UNIX_EXTATTR_CAP & caps) { + __u64 ExtAttrMask = 0; rc = CIFSGetExtAttr(xid, tcon, pSMBFile->fid.netfid, &ExtAttrBits, &ExtAttrMask); @@ -63,29 +211,70 @@ rc = put_user(ExtAttrBits & FS_FL_USER_VISIBLE, (int __user *)arg); + if (rc != EOPNOTSUPP) + break; + } +#endif /* CONFIG_CIFS_POSIX */ + rc = 0; + if (CIFS_I(inode)->cifsAttrs & ATTR_COMPRESSED) { + /* add in the compressed bit */ + ExtAttrBits = FS_COMPR_FL; + rc = put_user(ExtAttrBits & FS_FL_USER_VISIBLE, + (int __user *)arg); } break; - case FS_IOC_SETFLAGS: if (pSMBFile == NULL) break; tcon = tlink_tcon(pSMBFile->tlink); caps = le64_to_cpu(tcon->fsUnixInfo.Capability); - if (CIFS_UNIX_EXTATTR_CAP & caps) { - if (get_user(ExtAttrBits, (int __user *)arg)) { - rc = -EFAULT; - break; - } - /* - * rc = CIFSGetExtAttr(xid, tcon, - * pSMBFile->fid.netfid, - * extAttrBits, - * &ExtAttrMask); - */ + + if (get_user(ExtAttrBits, (int __user *)arg)) { + rc = -EFAULT; + break; + } + + /* + * if (CIFS_UNIX_EXTATTR_CAP & caps) + * rc = CIFSSetExtAttr(xid, tcon, + * pSMBFile->fid.netfid, + * extAttrBits, + * &ExtAttrMask); + * if (rc != EOPNOTSUPP) + * break; + */ + + /* Currently only flag we can set is compressed flag */ + if ((ExtAttrBits & FS_COMPR_FL) == 0) + break; + + /* Try to set compress flag */ + if (tcon->ses->server->ops->set_compression) { + rc = tcon->ses->server->ops->set_compression( + xid, tcon, pSMBFile); + cifs_dbg(FYI, "set compress flag rc %d\n", rc); } - cifs_dbg(FYI, "set flags not implemented yet\n"); break; -#endif /* CONFIG_CIFS_POSIX */ + case CIFS_IOC_COPYCHUNK_FILE: + rc = cifs_ioctl_clone(xid, filep, arg, 0, 0, 0, false); + break; + case BTRFS_IOC_CLONE: + rc = cifs_ioctl_clone(xid, filep, arg, 0, 0, 0, true); + break; + case CIFS_IOC_SET_INTEGRITY: + if (pSMBFile == NULL) + break; + tcon = tlink_tcon(pSMBFile->tlink); + if (tcon->ses->server->ops->set_integrity) + rc = tcon->ses->server->ops->set_integrity(xid, + tcon, pSMBFile); + else + rc = -EOPNOTSUPP; + break; + case CIFS_IOC_GET_MNT_INFO: + tcon = tlink_tcon(pSMBFile->tlink); + rc = smb_mnt_get_fsinfo(xid, tcon, (void __user *)arg); + break; default: cifs_dbg(FYI, "unsupported ioctl\n"); break;