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btrfs-progs: receive: process setflags ioctl commands

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In send stream v2, send can emit a command for setting inode flags via
the setflags ioctl. Pass the flags attribute through to the ioctl call
in receive.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Boris Burkov <boris@bur.io>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Boris Burkov 2022-03-17 10:25:51 -07:00 committed by David Sterba
parent 54db5c0397
commit 7a6fb356dc
4 changed files with 39 additions and 0 deletions
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6
cmds/receive-dump.c
View File

@ -339,6 +339,11 @@ static int print_fallocate(const char *path, int mode, u64 offset, u64 len,
mode, offset, len);
}
static int print_setflags(const char *path, int flags, void *user)
{
return PRINT_DUMP(user, path, "setflags", "flags=%d", flags);
}
struct btrfs_send_ops btrfs_print_send_ops = {
.subvol = print_subvol,
.snapshot = print_snapshot,
@ -363,4 +368,5 @@ struct btrfs_send_ops btrfs_print_send_ops = {
.update_extent = print_update_extent,
.encoded_write = print_encoded_write,
.fallocate = print_fallocate,
.setflags = print_setflags,
};

25
cmds/receive.c
View File

@ -38,6 +38,7 @@
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/xattr.h>
#include <linux/fs.h>
#include <uuid/uuid.h>
#include <lzo/lzo1x.h>
@ -1284,6 +1285,29 @@ static int process_fallocate(const char *path, int mode, u64 offset, u64 len,
return 0;
}
static int process_setflags(const char *path, int flags, void *user)
{
int ret;
struct btrfs_receive *rctx = user;
char full_path[PATH_MAX];
ret = path_cat_out(full_path, rctx->full_subvol_path, path);
if (ret < 0) {
error("setflags: path invalid: %s", path);
return ret;
}
ret = open_inode_for_write(rctx, full_path);
if (ret < 0)
return ret;
ret = ioctl(rctx->write_fd, FS_IOC_SETFLAGS, &flags);
if (ret < 0) {
ret = -errno;
error("setflags: setflags ioctl on %s failed: %m", path);
return ret;
}
return 0;
}
static struct btrfs_send_ops send_ops = {
.subvol = process_subvol,
.snapshot = process_snapshot,
@ -1308,6 +1332,7 @@ static struct btrfs_send_ops send_ops = {
.update_extent = process_update_extent,
.encoded_write = process_encoded_write,
.fallocate = process_fallocate,
.setflags = process_setflags,
};
static int do_receive(struct btrfs_receive *rctx, const char *tomnt,

7
common/send-stream.c
View File

@ -375,6 +375,7 @@ static int read_and_process_cmd(struct btrfs_send_stream *sctx)
int len;
int xattr_len;
int fallocate_mode;
int setflags_flags;
ret = read_cmd(sctx);
if (ret)
@ -547,8 +548,14 @@ static int read_and_process_cmd(struct btrfs_send_stream *sctx)
ret = sctx->ops->fallocate(path, fallocate_mode, offset, tmp,
sctx->user);
break;
case BTRFS_SEND_C_SETFLAGS:
TLV_GET_STRING(sctx, BTRFS_SEND_A_PATH, &path);
TLV_GET_U32(sctx, BTRFS_SEND_A_SETFLAGS_FLAGS, &setflags_flags);
ret = sctx->ops->setflags(path, setflags_flags, sctx->user);
break;
}
tlv_get_failed:
out:
free(path);

1
common/send-stream.h
View File

@ -59,6 +59,7 @@ struct btrfs_send_ops {
u32 encryption, void *user);
int (*fallocate)(const char *path, int mode, u64 offset, u64 len,
void *user);
int (*setflags)(const char *path, int flags, void *user);
};
int btrfs_read_and_process_send_stream(int fd,