| Message ID | 20151209204033.GB10582@birch.djwong.org (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
On Wed, Dec 09, 2015 at 12:40:33PM -0800, Darrick J. Wong wrote: > I tried this patch series on ppc64 (w/ 32-bit powerpc userland) and I think > it needs to fix up the compat ioctl to make the vfs call... Might need a proper signoff for Al, unless he wants to directly fold it.. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Wed, Dec 09, 2015 at 12:40:33PM -0800, Darrick J. Wong wrote: > On Thu, Dec 03, 2015 at 12:59:50PM +0100, Christoph Hellwig wrote: > > The btrfs clone ioctls are now adopted by other file systems, with NFS > > and CIFS already having support for them, and XFS being under active > > development. To avoid growth of various slightly incompatible > > implementations, add one to the VFS. Note that clones are different from > > file copies in several ways: > > > > - they are atomic vs other writers > > - they support whole file clones > > - they support 64-bit legth clones > > - they do not allow partial success (aka short writes) > > - clones are expected to be a fast metadata operation > > > > Because of that it would be rather cumbersome to try to piggyback them on > > top of the recent clone_file_range infrastructure. The converse isn't > > true and the clone_file_range system call could try clone file range as > > a first attempt to copy, something that further patches will enable. > > > > Based on earlier work from Peng Tao. > > > > Signed-off-by: Christoph Hellwig <hch@lst.de> > > --- > > fs/btrfs/ctree.h | 3 +- > > fs/btrfs/file.c | 1 + > > fs/btrfs/ioctl.c | 49 ++----------------- > > fs/cifs/cifsfs.c | 63 ++++++++++++++++++++++++ > > fs/cifs/cifsfs.h | 1 - > > fs/cifs/ioctl.c | 126 +++++++++++++++++++++++------------------------- > > fs/ioctl.c | 29 +++++++++++ > > I tried this patch series on ppc64 (w/ 32-bit powerpc userland) and I think > it needs to fix up the compat ioctl to make the vfs call... Bah, forgot to add: Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> (Feel free to fold this three line chunk into the original patch...) --D > diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c > index dcf2653..70d4b10 100644 > --- a/fs/compat_ioctl.c > +++ b/fs/compat_ioctl.c > @@ -1580,6 +1580,10 @@ COMPAT_SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd, > goto out_fput; > #endif > > + case FICLONE: > + case FICLONERANGE: > + goto do_ioctl; > + > case FIBMAP: > case FIGETBSZ: > case FIONREAD: > > --D > > > fs/nfs/nfs4file.c | 87 ++++----------------------------- > > fs/read_write.c | 72 +++++++++++++++++++++++++++ > > include/linux/fs.h | 7 ++- > > include/uapi/linux/fs.h | 9 ++++ > > 11 files changed, 254 insertions(+), 193 deletions(-) > > > > diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h > > index ede7277..dd4733f 100644 > > --- a/fs/btrfs/ctree.h > > +++ b/fs/btrfs/ctree.h > > @@ -4025,7 +4025,6 @@ void btrfs_get_block_group_info(struct list_head *groups_list, > > void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock, > > struct btrfs_ioctl_balance_args *bargs); > > > > - > > /* file.c */ > > int btrfs_auto_defrag_init(void); > > void btrfs_auto_defrag_exit(void); > > @@ -4058,6 +4057,8 @@ int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); > > ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in, > > struct file *file_out, loff_t pos_out, > > size_t len, unsigned int flags); > > +int btrfs_clone_file_range(struct file *file_in, loff_t pos_in, > > + struct file *file_out, loff_t pos_out, u64 len); > > > > /* tree-defrag.c */ > > int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, > > diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c > > index e67fe6a..232e300 100644 > > --- a/fs/btrfs/file.c > > +++ b/fs/btrfs/file.c > > @@ -2925,6 +2925,7 @@ const struct file_operations btrfs_file_operations = { > > .compat_ioctl = btrfs_ioctl, > > #endif > > .copy_file_range = btrfs_copy_file_range, > > + .clone_file_range = btrfs_clone_file_range, > > }; > > > > void btrfs_auto_defrag_exit(void) > > diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c > > index 0f92735..85b1cae 100644 > > --- a/fs/btrfs/ioctl.c > > +++ b/fs/btrfs/ioctl.c > > @@ -3906,49 +3906,10 @@ ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in, > > return ret; > > } > > > > -static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, > > - u64 off, u64 olen, u64 destoff) > > +int btrfs_clone_file_range(struct file *src_file, loff_t off, > > + struct file *dst_file, loff_t destoff, u64 len) > > { > > - struct fd src_file; > > - int ret; > > - > > - /* the destination must be opened for writing */ > > - if (!(file->f_mode & FMODE_WRITE) || (file->f_flags & O_APPEND)) > > - return -EINVAL; > > - > > - ret = mnt_want_write_file(file); > > - if (ret) > > - return ret; > > - > > - src_file = fdget(srcfd); > > - if (!src_file.file) { > > - ret = -EBADF; > > - goto out_drop_write; > > - } > > - > > - /* the src must be open for reading */ > > - if (!(src_file.file->f_mode & FMODE_READ)) { > > - ret = -EINVAL; > > - goto out_fput; > > - } > > - > > - ret = btrfs_clone_files(file, src_file.file, off, olen, destoff); > > - > > -out_fput: > > - fdput(src_file); > > -out_drop_write: > > - mnt_drop_write_file(file); > > - return ret; > > -} > > - > > -static long btrfs_ioctl_clone_range(struct file *file, void __user *argp) > > -{ > > - struct btrfs_ioctl_clone_range_args args; > > - > > - if (copy_from_user(&args, argp, sizeof(args))) > > - return -EFAULT; > > - return btrfs_ioctl_clone(file, args.src_fd, args.src_offset, > > - args.src_length, args.dest_offset); > > + return btrfs_clone_files(dst_file, src_file, off, len, destoff); > > } > > > > /* > > @@ -5498,10 +5459,6 @@ long btrfs_ioctl(struct file *file, unsigned int > > return btrfs_ioctl_dev_info(root, argp); > > case BTRFS_IOC_BALANCE: > > return btrfs_ioctl_balance(file, NULL); > > - case BTRFS_IOC_CLONE: > > - return btrfs_ioctl_clone(file, arg, 0, 0, 0); > > - case BTRFS_IOC_CLONE_RANGE: > > - return btrfs_ioctl_clone_range(file, argp); > > case BTRFS_IOC_TRANS_START: > > return btrfs_ioctl_trans_start(file); > > case BTRFS_IOC_TRANS_END: > > diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c > > index cbc0f4b..e9b978f 100644 > > --- a/fs/cifs/cifsfs.c > > +++ b/fs/cifs/cifsfs.c > > @@ -914,6 +914,61 @@ const struct inode_operations cifs_symlink_inode_ops = { > > #endif > > }; > > > > +static int cifs_clone_file_range(struct file *src_file, loff_t off, > > + struct file *dst_file, loff_t destoff, u64 len) > > +{ > > + struct inode *src_inode = file_inode(src_file); > > + struct inode *target_inode = file_inode(dst_file); > > + struct cifsFileInfo *smb_file_src = src_file->private_data; > > + struct cifsFileInfo *smb_file_target = dst_file->private_data; > > + struct cifs_tcon *src_tcon = tlink_tcon(smb_file_src->tlink); > > + struct cifs_tcon *target_tcon = tlink_tcon(smb_file_target->tlink); > > + unsigned int xid; > > + int rc; > > + > > + cifs_dbg(FYI, "clone range\n"); > > + > > + xid = get_xid(); > > + > > + if (!src_file->private_data || !dst_file->private_data) { > > + rc = -EBADF; > > + cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n"); > > + goto out; > > + } > > + > > + /* > > + * 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); > > + > > + 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 (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; > > + > > + /* 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: > > + free_xid(xid); > > + return rc; > > +} > > + > > const struct file_operations cifs_file_ops = { > > .read_iter = cifs_loose_read_iter, > > .write_iter = cifs_file_write_iter, > > @@ -926,6 +981,7 @@ const struct file_operations cifs_file_ops = { > > .splice_read = generic_file_splice_read, > > .llseek = cifs_llseek, > > .unlocked_ioctl = cifs_ioctl, > > + .clone_file_range = cifs_clone_file_range, > > .setlease = cifs_setlease, > > .fallocate = cifs_fallocate, > > }; > > @@ -942,6 +998,8 @@ const struct file_operations cifs_file_strict_ops = { > > .splice_read = generic_file_splice_read, > > .llseek = cifs_llseek, > > .unlocked_ioctl = cifs_ioctl, > > + .clone_file_range = cifs_clone_file_range, > > + .clone_file_range = cifs_clone_file_range, > > .setlease = cifs_setlease, > > .fallocate = cifs_fallocate, > > }; > > @@ -958,6 +1016,7 @@ const struct file_operations cifs_file_direct_ops = { > > .mmap = cifs_file_mmap, > > .splice_read = generic_file_splice_read, > > .unlocked_ioctl = cifs_ioctl, > > + .clone_file_range = cifs_clone_file_range, > > .llseek = cifs_llseek, > > .setlease = cifs_setlease, > > .fallocate = cifs_fallocate, > > @@ -974,6 +1033,7 @@ const struct file_operations cifs_file_nobrl_ops = { > > .splice_read = generic_file_splice_read, > > .llseek = cifs_llseek, > > .unlocked_ioctl = cifs_ioctl, > > + .clone_file_range = cifs_clone_file_range, > > .setlease = cifs_setlease, > > .fallocate = cifs_fallocate, > > }; > > @@ -989,6 +1049,7 @@ const struct file_operations cifs_file_strict_nobrl_ops = { > > .splice_read = generic_file_splice_read, > > .llseek = cifs_llseek, > > .unlocked_ioctl = cifs_ioctl, > > + .clone_file_range = cifs_clone_file_range, > > .setlease = cifs_setlease, > > .fallocate = cifs_fallocate, > > }; > > @@ -1004,6 +1065,7 @@ const struct file_operations cifs_file_direct_nobrl_ops = { > > .mmap = cifs_file_mmap, > > .splice_read = generic_file_splice_read, > > .unlocked_ioctl = cifs_ioctl, > > + .clone_file_range = cifs_clone_file_range, > > .llseek = cifs_llseek, > > .setlease = cifs_setlease, > > .fallocate = cifs_fallocate, > > @@ -1014,6 +1076,7 @@ const struct file_operations cifs_dir_ops = { > > .release = cifs_closedir, > > .read = generic_read_dir, > > .unlocked_ioctl = cifs_ioctl, > > + .clone_file_range = cifs_clone_file_range, > > .llseek = generic_file_llseek, > > }; > > > > diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h > > index c3cc160..c399513 100644 > > --- a/fs/cifs/cifsfs.h > > +++ b/fs/cifs/cifsfs.h > > @@ -131,7 +131,6 @@ extern int cifs_setxattr(struct dentry *, const char *, const void *, > > extern ssize_t cifs_getxattr(struct dentry *, const char *, void *, size_t); > > extern ssize_t cifs_listxattr(struct dentry *, char *, size_t); > > extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg); > > - > > #ifdef CONFIG_CIFS_NFSD_EXPORT > > extern const struct export_operations cifs_export_ops; > > #endif /* CONFIG_CIFS_NFSD_EXPORT */ > > diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c > > index 35cf990..7a3b84e 100644 > > --- a/fs/cifs/ioctl.c > > +++ b/fs/cifs/ioctl.c > > @@ -34,73 +34,36 @@ > > #include "cifs_ioctl.h" > > #include <linux/btrfs.h> > > > > -static long cifs_ioctl_clone(unsigned int xid, struct file *dst_file, > > - unsigned long srcfd, u64 off, u64 len, u64 destoff, > > - bool dup_extents) > > +static int cifs_file_clone_range(unsigned int xid, struct file *src_file, > > + struct file *dst_file) > > { > > - int rc; > > - struct cifsFileInfo *smb_file_target = dst_file->private_data; > > + struct inode *src_inode = file_inode(src_file); > > 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 cifsFileInfo *smb_file_target; > > struct cifs_tcon *src_tcon; > > + struct cifs_tcon *target_tcon; > > + int rc; > > > > 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)) { > > + if (!src_file->private_data || !dst_file->private_data) { > > rc = -EBADF; > > cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n"); > > - goto out_fput; > > + goto out; > > } > > > > rc = -EXDEV; > > smb_file_target = dst_file->private_data; > > - smb_file_src = src_file.file->private_data; > > + smb_file_src = src_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)) { > > + if (src_tcon->ses != target_tcon->ses) { > > cifs_dbg(VFS, "source and target of copy not on same server\n"); > > - goto out_fput; > > + goto out; > > } > > > > - 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 > > @@ -108,34 +71,66 @@ static long cifs_ioctl_clone(unsigned int xid, struct file *dst_file, > > */ > > 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); > > + truncate_inode_pages(&target_inode->i_data, 0); > > > > - 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) > > + if (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); > > + smb_file_src, smb_file_target, 0, src_inode->i_size, 0); > > 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: > > + return rc; > > +} > > + > > +static long cifs_ioctl_clone(unsigned int xid, struct file *dst_file, > > + unsigned long srcfd) > > +{ > > + int rc; > > + struct fd src_file; > > + struct inode *src_inode; > > + > > + 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; > > + } > > + > > + src_inode = file_inode(src_file.file); > > + rc = -EINVAL; > > + if (S_ISDIR(src_inode->i_mode)) > > + goto out_fput; > > + > > + rc = cifs_file_clone_range(xid, src_file.file, dst_file); > > + > > out_fput: > > fdput(src_file); > > out_drop_write: > > @@ -256,10 +251,7 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) > > } > > break; > > 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); > > + rc = cifs_ioctl_clone(xid, filep, arg); > > break; > > case CIFS_IOC_SET_INTEGRITY: > > if (pSMBFile == NULL) > > diff --git a/fs/ioctl.c b/fs/ioctl.c > > index 5d01d26..84c6e79 100644 > > --- a/fs/ioctl.c > > +++ b/fs/ioctl.c > > @@ -215,6 +215,29 @@ static int ioctl_fiemap(struct file *filp, unsigned long arg) > > return error; > > } > > > > +static long ioctl_file_clone(struct file *dst_file, unsigned long srcfd, > > + u64 off, u64 olen, u64 destoff) > > +{ > > + struct fd src_file = fdget(srcfd); > > + int ret; > > + > > + if (!src_file.file) > > + return -EBADF; > > + ret = vfs_clone_file_range(src_file.file, off, dst_file, destoff, olen); > > + fdput(src_file); > > + return ret; > > +} > > + > > +static long ioctl_file_clone_range(struct file *file, void __user *argp) > > +{ > > + struct file_clone_range args; > > + > > + if (copy_from_user(&args, argp, sizeof(args))) > > + return -EFAULT; > > + return ioctl_file_clone(file, args.src_fd, args.src_offset, > > + args.src_length, args.dest_offset); > > +} > > + > > #ifdef CONFIG_BLOCK > > > > static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) > > @@ -600,6 +623,12 @@ int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd, > > case FIGETBSZ: > > return put_user(inode->i_sb->s_blocksize, argp); > > > > + case FICLONE: > > + return ioctl_file_clone(filp, arg, 0, 0, 0); > > + > > + case FICLONERANGE: > > + return ioctl_file_clone_range(filp, argp); > > + > > default: > > if (S_ISREG(inode->i_mode)) > > error = file_ioctl(filp, cmd, arg); > > diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c > > index db9b5fe..26f9a23 100644 > > --- a/fs/nfs/nfs4file.c > > +++ b/fs/nfs/nfs4file.c > > @@ -195,65 +195,27 @@ static long nfs42_fallocate(struct file *filep, int mode, loff_t offset, loff_t > > return nfs42_proc_allocate(filep, offset, len); > > } > > > > -static noinline long > > -nfs42_ioctl_clone(struct file *dst_file, unsigned long srcfd, > > - u64 src_off, u64 dst_off, u64 count) > > +static int nfs42_clone_file_range(struct file *src_file, loff_t src_off, > > + struct file *dst_file, loff_t dst_off, u64 count) > > { > > struct inode *dst_inode = file_inode(dst_file); > > struct nfs_server *server = NFS_SERVER(dst_inode); > > - struct fd src_file; > > - struct inode *src_inode; > > + struct inode *src_inode = file_inode(src_file); > > unsigned int bs = server->clone_blksize; > > bool same_inode = false; > > int ret; > > > > - /* dst file must be opened for writing */ > > - if (!(dst_file->f_mode & FMODE_WRITE)) > > - return -EINVAL; > > - > > - ret = mnt_want_write_file(dst_file); > > - if (ret) > > - return ret; > > - > > - src_file = fdget(srcfd); > > - if (!src_file.file) { > > - ret = -EBADF; > > - goto out_drop_write; > > - } > > - > > - src_inode = file_inode(src_file.file); > > - > > - if (src_inode == dst_inode) > > - same_inode = true; > > - > > - /* src file must be opened for reading */ > > - if (!(src_file.file->f_mode & FMODE_READ)) > > - goto out_fput; > > - > > - /* src and dst must be regular files */ > > - ret = -EISDIR; > > - if (!S_ISREG(src_inode->i_mode) || !S_ISREG(dst_inode->i_mode)) > > - goto out_fput; > > - > > - ret = -EXDEV; > > - if (src_file.file->f_path.mnt != dst_file->f_path.mnt || > > - src_inode->i_sb != dst_inode->i_sb) > > - goto out_fput; > > - > > /* check alignment w.r.t. clone_blksize */ > > ret = -EINVAL; > > if (bs) { > > if (!IS_ALIGNED(src_off, bs) || !IS_ALIGNED(dst_off, bs)) > > - goto out_fput; > > + goto out; > > if (!IS_ALIGNED(count, bs) && i_size_read(src_inode) != (src_off + count)) > > - goto out_fput; > > + goto out; > > } > > > > - /* verify if ranges are overlapped within the same file */ > > - if (same_inode) { > > - if (dst_off + count > src_off && dst_off < src_off + count) > > - goto out_fput; > > - } > > + if (src_inode == dst_inode) > > + same_inode = true; > > > > /* XXX: do we lock at all? what if server needs CB_RECALL_LAYOUT? */ > > if (same_inode) { > > @@ -275,7 +237,7 @@ nfs42_ioctl_clone(struct file *dst_file, unsigned long srcfd, > > if (ret) > > goto out_unlock; > > > > - ret = nfs42_proc_clone(src_file.file, dst_file, src_off, dst_off, count); > > + ret = nfs42_proc_clone(src_file, dst_file, src_off, dst_off, count); > > > > /* truncate inode page cache of the dst range so that future reads can fetch > > * new data from server */ > > @@ -292,37 +254,9 @@ out_unlock: > > mutex_unlock(&dst_inode->i_mutex); > > mutex_unlock(&src_inode->i_mutex); > > } > > -out_fput: > > - fdput(src_file); > > -out_drop_write: > > - mnt_drop_write_file(dst_file); > > +out: > > return ret; > > } > > - > > -static long nfs42_ioctl_clone_range(struct file *dst_file, void __user *argp) > > -{ > > - struct btrfs_ioctl_clone_range_args args; > > - > > - if (copy_from_user(&args, argp, sizeof(args))) > > - return -EFAULT; > > - > > - return nfs42_ioctl_clone(dst_file, args.src_fd, args.src_offset, > > - args.dest_offset, args.src_length); > > -} > > - > > -long nfs4_ioctl(struct file *file, unsigned int cmd, unsigned long arg) > > -{ > > - void __user *argp = (void __user *)arg; > > - > > - switch (cmd) { > > - case BTRFS_IOC_CLONE: > > - return nfs42_ioctl_clone(file, arg, 0, 0, 0); > > - case BTRFS_IOC_CLONE_RANGE: > > - return nfs42_ioctl_clone_range(file, argp); > > - } > > - > > - return -ENOTTY; > > -} > > #endif /* CONFIG_NFS_V4_2 */ > > > > const struct file_operations nfs4_file_operations = { > > @@ -342,8 +276,7 @@ const struct file_operations nfs4_file_operations = { > > #ifdef CONFIG_NFS_V4_2 > > .llseek = nfs4_file_llseek, > > .fallocate = nfs42_fallocate, > > - .unlocked_ioctl = nfs4_ioctl, > > - .compat_ioctl = nfs4_ioctl, > > + .clone_file_range = nfs42_clone_file_range, > > #else > > .llseek = nfs_file_llseek, > > #endif > > diff --git a/fs/read_write.c b/fs/read_write.c > > index 6c1aa73..9e3dd8f 100644 > > --- a/fs/read_write.c > > +++ b/fs/read_write.c > > @@ -1451,3 +1451,75 @@ out1: > > out2: > > return ret; > > } > > + > > +static int clone_verify_area(struct file *file, loff_t pos, u64 len, bool write) > > +{ > > + struct inode *inode = file_inode(file); > > + > > + if (unlikely(pos < 0)) > > + return -EINVAL; > > + > > + if (unlikely((loff_t) (pos + len) < 0)) > > + return -EINVAL; > > + > > + if (unlikely(inode->i_flctx && mandatory_lock(inode))) { > > + loff_t end = len ? pos + len - 1 : OFFSET_MAX; > > + int retval; > > + > > + retval = locks_mandatory_area(file, pos, end, > > + write ? F_WRLCK : F_RDLCK); > > + if (retval < 0) > > + return retval; > > + } > > + > > + return security_file_permission(file, write ? MAY_WRITE : MAY_READ); > > +} > > + > > +int vfs_clone_file_range(struct file *file_in, loff_t pos_in, > > + struct file *file_out, loff_t pos_out, u64 len) > > +{ > > + struct inode *inode_in = file_inode(file_in); > > + struct inode *inode_out = file_inode(file_out); > > + int ret; > > + > > + if (inode_in->i_sb != inode_out->i_sb || > > + file_in->f_path.mnt != file_out->f_path.mnt) > > + return -EXDEV; > > + > > + if (S_ISDIR(inode_in->i_mode) || S_ISDIR(inode_out->i_mode)) > > + return -EISDIR; > > + if (!S_ISREG(inode_in->i_mode) || !S_ISREG(inode_out->i_mode)) > > + return -EOPNOTSUPP; > > + > > + if (!(file_in->f_mode & FMODE_READ) || > > + !(file_out->f_mode & FMODE_WRITE) || > > + (file_out->f_flags & O_APPEND) || > > + !file_in->f_op->clone_file_range) > > + return -EBADF; > > + > > + ret = clone_verify_area(file_in, pos_in, len, false); > > + if (ret) > > + return ret; > > + > > + ret = clone_verify_area(file_out, pos_out, len, true); > > + if (ret) > > + return ret; > > + > > + if (pos_in + len > i_size_read(inode_in)) > > + return -EINVAL; > > + > > + ret = mnt_want_write_file(file_out); > > + if (ret) > > + return ret; > > + > > + ret = file_in->f_op->clone_file_range(file_in, pos_in, > > + file_out, pos_out, len); > > + if (!ret) { > > + fsnotify_access(file_in); > > + fsnotify_modify(file_out); > > + } > > + > > + mnt_drop_write_file(file_out); > > + return ret; > > +} > > +EXPORT_SYMBOL(vfs_clone_file_range); > > diff --git a/include/linux/fs.h b/include/linux/fs.h > > index af559ac..59bf96d 100644 > > --- a/include/linux/fs.h > > +++ b/include/linux/fs.h > > @@ -1629,7 +1629,10 @@ struct file_operations { > > #ifndef CONFIG_MMU > > unsigned (*mmap_capabilities)(struct file *); > > #endif > > - ssize_t (*copy_file_range)(struct file *, loff_t, struct file *, loff_t, size_t, unsigned int); > > + ssize_t (*copy_file_range)(struct file *, loff_t, struct file *, > > + loff_t, size_t, unsigned int); > > + int (*clone_file_range)(struct file *, loff_t, struct file *, loff_t, > > + u64); > > }; > > > > struct inode_operations { > > @@ -1683,6 +1686,8 @@ extern ssize_t vfs_writev(struct file *, const struct iovec __user *, > > unsigned long, loff_t *); > > extern ssize_t vfs_copy_file_range(struct file *, loff_t , struct file *, > > loff_t, size_t, unsigned int); > > +extern int vfs_clone_file_range(struct file *file_in, loff_t pos_in, > > + struct file *file_out, loff_t pos_out, u64 len); > > > > struct super_operations { > > struct inode *(*alloc_inode)(struct super_block *sb); > > diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h > > index f15d980..cd5db7f 100644 > > --- a/include/uapi/linux/fs.h > > +++ b/include/uapi/linux/fs.h > > @@ -39,6 +39,13 @@ > > #define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */ > > #define RENAME_WHITEOUT (1 << 2) /* Whiteout source */ > > > > +struct file_clone_range { > > + __s64 src_fd; > > + __u64 src_offset; > > + __u64 src_length; > > + __u64 dest_offset; > > +}; > > + > > struct fstrim_range { > > __u64 start; > > __u64 len; > > @@ -159,6 +166,8 @@ struct inodes_stat_t { > > #define FIFREEZE _IOWR('X', 119, int) /* Freeze */ > > #define FITHAW _IOWR('X', 120, int) /* Thaw */ > > #define FITRIM _IOWR('X', 121, struct fstrim_range) /* Trim */ > > +#define FICLONE _IOW(0x94, 9, int) > > +#define FICLONERANGE _IOW(0x94, 13, struct file_clone_range) > > > > #define FS_IOC_GETFLAGS _IOR('f', 1, long) > > #define FS_IOC_SETFLAGS _IOW('f', 2, long) > > -- > > 1.9.1 > > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- > To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c index dcf2653..70d4b10 100644 --- a/fs/compat_ioctl.c +++ b/fs/compat_ioctl.c @@ -1580,6 +1580,10 @@ COMPAT_SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd, goto out_fput; #endif + case FICLONE: + case FICLONERANGE: + goto do_ioctl; + case FIBMAP: case FIGETBSZ: case FIONREAD: