[thirdparty/systemd.git] / src / import / import-raw.c

/* SPDX-License-Identifier: LGPL-2.1+ */

#include <linux/fs.h>

#include "sd-daemon.h"
#include "sd-event.h"

#include "alloc-util.h"
#include "btrfs-util.h"
#include "chattr-util.h"
#include "copy.h"
#include "fd-util.h"
#include "fs-util.h"
#include "hostname-util.h"
#include "import-common.h"
#include "import-compress.h"
#include "import-raw.h"
#include "io-util.h"
#include "machine-pool.h"
#include "mkdir.h"
#include "path-util.h"
#include "qcow2-util.h"
#include "ratelimit.h"
#include "rm-rf.h"
#include "string-util.h"
#include "tmpfile-util.h"
#include "util.h"

struct RawImport {
        sd_event *event;

        char *image_root;

        RawImportFinished on_finished;
        void *userdata;

        char *local;
        bool force_local;
        bool read_only;

        char *temp_path;
        char *final_path;

        int input_fd;
        int output_fd;

        ImportCompress compress;

        sd_event_source *input_event_source;

        uint8_t buffer[16*1024];
        size_t buffer_size;

        uint64_t written_compressed;
        uint64_t written_uncompressed;

        struct stat st;

        unsigned last_percent;
        RateLimit progress_rate_limit;
};

RawImport* raw_import_unref(RawImport *i) {
        if (!i)
                return NULL;

        sd_event_unref(i->event);

        if (i->temp_path) {
                (void) unlink(i->temp_path);
                free(i->temp_path);
        }

        import_compress_free(&i->compress);

        sd_event_source_unref(i->input_event_source);

        safe_close(i->output_fd);

        free(i->final_path);
        free(i->image_root);
        free(i->local);
        return mfree(i);
}

int raw_import_new(
                RawImport **ret,
                sd_event *event,
                const char *image_root,
                RawImportFinished on_finished,
                void *userdata) {

        _cleanup_(raw_import_unrefp) RawImport *i = NULL;
        _cleanup_free_ char *root = NULL;
        int r;

        assert(ret);

        root = strdup(image_root ?: "/var/lib/machines");
        if (!root)
                return -ENOMEM;

        i = new(RawImport, 1);
        if (!i)
                return -ENOMEM;

        *i = (RawImport) {
                .input_fd = -1,
                .output_fd = -1,
                .on_finished = on_finished,
                .userdata = userdata,
                .last_percent = (unsigned) -1,
                .image_root = TAKE_PTR(root),
        };

        RATELIMIT_INIT(i->progress_rate_limit, 100 * USEC_PER_MSEC, 1);

        if (event)
                i->event = sd_event_ref(event);
        else {
                r = sd_event_default(&i->event);
                if (r < 0)
                        return r;
        }

        *ret = TAKE_PTR(i);

        return 0;
}

static void raw_import_report_progress(RawImport *i) {
        unsigned percent;
        assert(i);

        /* We have no size information, unless the source is a regular file */
        if (!S_ISREG(i->st.st_mode))
                return;

        if (i->written_compressed >= (uint64_t) i->st.st_size)
                percent = 100;
        else
                percent = (unsigned) ((i->written_compressed * UINT64_C(100)) / (uint64_t) i->st.st_size);

        if (percent == i->last_percent)
                return;

        if (!ratelimit_below(&i->progress_rate_limit))
                return;

        sd_notifyf(false, "X_IMPORT_PROGRESS=%u", percent);
        log_info("Imported %u%%.", percent);

        i->last_percent = percent;
}

static int raw_import_maybe_convert_qcow2(RawImport *i) {
        _cleanup_close_ int converted_fd = -1;
        _cleanup_free_ char *t = NULL;
        int r;

        assert(i);

        r = qcow2_detect(i->output_fd);
        if (r < 0)
                return log_error_errno(r, "Failed to detect whether this is a QCOW2 image: %m");
        if (r == 0)
                return 0;

        /* This is a QCOW2 image, let's convert it */
        r = tempfn_random(i->final_path, NULL, &t);
        if (r < 0)
                return log_oom();

        converted_fd = open(t, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0664);
        if (converted_fd < 0)
                return log_error_errno(errno, "Failed to create %s: %m", t);

        r = chattr_fd(converted_fd, FS_NOCOW_FL, FS_NOCOW_FL, NULL);
        if (r < 0)
                log_warning_errno(r, "Failed to set file attributes on %s: %m", t);

        log_info("Unpacking QCOW2 file.");

        r = qcow2_convert(i->output_fd, converted_fd);
        if (r < 0) {
                unlink(t);
                return log_error_errno(r, "Failed to convert qcow2 image: %m");
        }

        (void) unlink(i->temp_path);
        free_and_replace(i->temp_path, t);

        safe_close(i->output_fd);
        i->output_fd = TAKE_FD(converted_fd);

        return 1;
}

static int raw_import_finish(RawImport *i) {
        int r;

        assert(i);
        assert(i->output_fd >= 0);
        assert(i->temp_path);
        assert(i->final_path);

        /* In case this was a sparse file, make sure the file system is right */
        if (i->written_uncompressed > 0) {
                if (ftruncate(i->output_fd, i->written_uncompressed) < 0)
                        return log_error_errno(errno, "Failed to truncate file: %m");
        }

        r = raw_import_maybe_convert_qcow2(i);
        if (r < 0)
                return r;

        if (S_ISREG(i->st.st_mode)) {
                (void) copy_times(i->input_fd, i->output_fd);
                (void) copy_xattr(i->input_fd, i->output_fd);
        }

        if (i->read_only) {
                r = import_make_read_only_fd(i->output_fd);
                if (r < 0)
                        return r;
        }

        if (i->force_local)
                (void) rm_rf(i->final_path, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME);

        r = rename_noreplace(AT_FDCWD, i->temp_path, AT_FDCWD, i->final_path);
        if (r < 0)
                return log_error_errno(r, "Failed to move image into place: %m");

        i->temp_path = mfree(i->temp_path);

        return 0;
}

static int raw_import_open_disk(RawImport *i) {
        int r;

        assert(i);

        assert(!i->final_path);
        assert(!i->temp_path);
        assert(i->output_fd < 0);

        i->final_path = strjoin(i->image_root, "/", i->local, ".raw");
        if (!i->final_path)
                return log_oom();

        r = tempfn_random(i->final_path, NULL, &i->temp_path);
        if (r < 0)
                return log_oom();

        (void) mkdir_parents_label(i->temp_path, 0700);

        i->output_fd = open(i->temp_path, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0664);
        if (i->output_fd < 0)
                return log_error_errno(errno, "Failed to open destination %s: %m", i->temp_path);

        r = chattr_fd(i->output_fd, FS_NOCOW_FL, FS_NOCOW_FL, NULL);
        if (r < 0)
                log_warning_errno(r, "Failed to set file attributes on %s: %m", i->temp_path);

        return 0;
}

static int raw_import_try_reflink(RawImport *i) {
        off_t p;
        int r;

        assert(i);
        assert(i->input_fd >= 0);
        assert(i->output_fd >= 0);

        if (i->compress.type != IMPORT_COMPRESS_UNCOMPRESSED)
                return 0;

        if (!S_ISREG(i->st.st_mode))
                return 0;

        p = lseek(i->input_fd, 0, SEEK_CUR);
        if (p == (off_t) -1)
                return log_error_errno(errno, "Failed to read file offset of input file: %m");

        /* Let's only try a btrfs reflink, if we are reading from the beginning of the file */
        if ((uint64_t) p != (uint64_t) i->buffer_size)
                return 0;

        r = btrfs_reflink(i->input_fd, i->output_fd);
        if (r >= 0)
                return 1;

        return 0;
}

static int raw_import_write(const void *p, size_t sz, void *userdata) {
        RawImport *i = userdata;
        ssize_t n;

        n = sparse_write(i->output_fd, p, sz, 64);
        if (n < 0)
                return (int) n;
        if ((size_t) n < sz)
                return -EIO;

        i->written_uncompressed += sz;

        return 0;
}

static int raw_import_process(RawImport *i) {
        ssize_t l;
        int r;

        assert(i);
        assert(i->buffer_size < sizeof(i->buffer));

        l = read(i->input_fd, i->buffer + i->buffer_size, sizeof(i->buffer) - i->buffer_size);
        if (l < 0) {
                if (errno == EAGAIN)
                        return 0;

                r = log_error_errno(errno, "Failed to read input file: %m");
                goto finish;
        }
        if (l == 0) {
                if (i->compress.type == IMPORT_COMPRESS_UNKNOWN) {
                        log_error("Premature end of file.");
                        r = -EIO;
                        goto finish;
                }

                r = raw_import_finish(i);
                goto finish;
        }

        i->buffer_size += l;

        if (i->compress.type == IMPORT_COMPRESS_UNKNOWN) {
                r = import_uncompress_detect(&i->compress, i->buffer, i->buffer_size);
                if (r < 0) {
                        log_error_errno(r, "Failed to detect file compression: %m");
                        goto finish;
                }
                if (r == 0) /* Need more data */
                        return 0;

                r = raw_import_open_disk(i);
                if (r < 0)
                        goto finish;

                r = raw_import_try_reflink(i);
                if (r < 0)
                        goto finish;
                if (r > 0) {
                        r = raw_import_finish(i);
                        goto finish;
                }
        }

        r = import_uncompress(&i->compress, i->buffer, i->buffer_size, raw_import_write, i);
        if (r < 0) {
                log_error_errno(r, "Failed to decode and write: %m");
                goto finish;
        }

        i->written_compressed += i->buffer_size;
        i->buffer_size = 0;

        raw_import_report_progress(i);

        return 0;

finish:
        if (i->on_finished)
                i->on_finished(i, r, i->userdata);
        else
                sd_event_exit(i->event, r);

        return 0;
}

static int raw_import_on_input(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
        RawImport *i = userdata;

        return raw_import_process(i);
}

static int raw_import_on_defer(sd_event_source *s, void *userdata) {
        RawImport *i = userdata;

        return raw_import_process(i);
}

int raw_import_start(RawImport *i, int fd, const char *local, bool force_local, bool read_only) {
        int r;

        assert(i);
        assert(fd >= 0);
        assert(local);

        if (!machine_name_is_valid(local))
                return -EINVAL;

        if (i->input_fd >= 0)
                return -EBUSY;

        r = fd_nonblock(fd, true);
        if (r < 0)
                return r;

        r = free_and_strdup(&i->local, local);
        if (r < 0)
                return r;
        i->force_local = force_local;
        i->read_only = read_only;

        if (fstat(fd, &i->st) < 0)
                return -errno;

        r = sd_event_add_io(i->event, &i->input_event_source, fd, EPOLLIN, raw_import_on_input, i);
        if (r == -EPERM) {
                /* This fd does not support epoll, for example because it is a regular file. Busy read in that case */
                r = sd_event_add_defer(i->event, &i->input_event_source, raw_import_on_defer, i);
                if (r < 0)
                        return r;

                r = sd_event_source_set_enabled(i->input_event_source, SD_EVENT_ON);
        }
        if (r < 0)
                return r;

        i->input_fd = fd;
        return r;
}
Commit	Line	Data
53e1b683	1	/* SPDX-License-Identifier: LGPL-2.1+ */
b6e676ce LP	2
	3	#include <linux/fs.h>
	4
	5	#include "sd-daemon.h"
	6	#include "sd-event.h"
07630cea	7
b5efdb8a	8	#include "alloc-util.h"
b6e676ce	9	#include "btrfs-util.h"
c8b3094d	10	#include "chattr-util.h"
b6e676ce	11	#include "copy.h"
3ffd4af2	12	#include "fd-util.h"
f4f15635	13	#include "fs-util.h"
07630cea LP	14	#include "hostname-util.h"
	15	#include "import-common.h"
	16	#include "import-compress.h"
3ffd4af2	17	#include "import-raw.h"
c004493c	18	#include "io-util.h"
b6e676ce	19	#include "machine-pool.h"
07630cea LP	20	#include "mkdir.h"
07630cea LP	21	#include "path-util.h"
b6e676ce	22	#include "qcow2-util.h"
07630cea LP	23	#include "ratelimit.h"
	24	#include "rm-rf.h"
	25	#include "string-util.h"
e4de7287	26	#include "tmpfile-util.h"
07630cea	27	#include "util.h"
b6e676ce LP	28
	29	struct RawImport {
	30	sd_event *event;
	31
	32	char *image_root;
	33
	34	RawImportFinished on_finished;
	35	void *userdata;
	36
	37	char *local;
	38	bool force_local;
	39	bool read_only;
b6e676ce LP	40
	41	char *temp_path;
	42	char *final_path;
	43
	44	int input_fd;
	45	int output_fd;
	46
	47	ImportCompress compress;
	48
b6e676ce LP	49	sd_event_source *input_event_source;
	50
	51	uint8_t buffer[16*1024];
	52	size_t buffer_size;
	53
	54	uint64_t written_compressed;
	55	uint64_t written_uncompressed;
	56
	57	struct stat st;
	58
	59	unsigned last_percent;
	60	RateLimit progress_rate_limit;
	61	};
	62
	63	RawImport* raw_import_unref(RawImport *i) {
	64	if (!i)
	65	return NULL;
	66
	67	sd_event_unref(i->event);
	68
	69	if (i->temp_path) {
	70	(void) unlink(i->temp_path);
	71	free(i->temp_path);
	72	}
	73
	74	import_compress_free(&i->compress);
	75
	76	sd_event_source_unref(i->input_event_source);
	77
	78	safe_close(i->output_fd);
	79
	80	free(i->final_path);
	81	free(i->image_root);
	82	free(i->local);
6b430fdb	83	return mfree(i);
b6e676ce LP	84	}
	85
	86	int raw_import_new(
	87	RawImport **ret,
	88	sd_event *event,
	89	const char *image_root,
	90	RawImportFinished on_finished,
	91	void *userdata) {
	92
	93	_cleanup_(raw_import_unrefp) RawImport *i = NULL;
0d94088e	94	_cleanup_free_ char *root = NULL;
b6e676ce LP	95	int r;
	96
	97	assert(ret);
	98
0d94088e YW	99	root = strdup(image_root ?: "/var/lib/machines");
0d94088e YW	100	if (!root)
b6e676ce LP	101	return -ENOMEM;
b6e676ce LP	102
0d94088e YW	103	i = new(RawImport, 1);
0d94088e YW	104	if (!i)
b6e676ce LP	105	return -ENOMEM;
b6e676ce LP	106
0d94088e YW	107	*i = (RawImport) {
	108	.input_fd = -1,
	109	.output_fd = -1,
	110	.on_finished = on_finished,
	111	.userdata = userdata,
	112	.last_percent = (unsigned) -1,
	113	.image_root = TAKE_PTR(root),
0d94088e YW	114	};
	115
	116	RATELIMIT_INIT(i->progress_rate_limit, 100 * USEC_PER_MSEC, 1);
b6e676ce LP	117
	118	if (event)
	119	i->event = sd_event_ref(event);
	120	else {
	121	r = sd_event_default(&i->event);
	122	if (r < 0)
	123	return r;
	124	}
	125
1cc6c93a	126	*ret = TAKE_PTR(i);
b6e676ce LP	127
	128	return 0;
	129	}
	130
	131	static void raw_import_report_progress(RawImport *i) {
	132	unsigned percent;
	133	assert(i);
	134
	135	/* We have no size information, unless the source is a regular file */
	136	if (!S_ISREG(i->st.st_mode))
	137	return;
	138
	139	if (i->written_compressed >= (uint64_t) i->st.st_size)
	140	percent = 100;
	141	else
	142	percent = (unsigned) ((i->written_compressed * UINT64_C(100)) / (uint64_t) i->st.st_size);
	143
	144	if (percent == i->last_percent)
	145	return;
	146
7994ac1d	147	if (!ratelimit_below(&i->progress_rate_limit))
b6e676ce LP	148	return;
	149
	150	sd_notifyf(false, "X_IMPORT_PROGRESS=%u", percent);
	151	log_info("Imported %u%%.", percent);
	152
	153	i->last_percent = percent;
	154	}
	155
	156	static int raw_import_maybe_convert_qcow2(RawImport *i) {
	157	_cleanup_close_ int converted_fd = -1;
	158	_cleanup_free_ char *t = NULL;
	159	int r;
	160
	161	assert(i);
	162
	163	r = qcow2_detect(i->output_fd);
	164	if (r < 0)
	165	return log_error_errno(r, "Failed to detect whether this is a QCOW2 image: %m");
	166	if (r == 0)
	167	return 0;
	168
	169	/* This is a QCOW2 image, let's convert it */
14bcf25c	170	r = tempfn_random(i->final_path, NULL, &t);
b6e676ce LP	171	if (r < 0)
	172	return log_oom();
	173
	174	converted_fd = open(t, O_RDWR\|O_CREAT\|O_EXCL\|O_NOCTTY\|O_CLOEXEC, 0664);
	175	if (converted_fd < 0)
	176	return log_error_errno(errno, "Failed to create %s: %m", t);
	177
db9a4254	178	r = chattr_fd(converted_fd, FS_NOCOW_FL, FS_NOCOW_FL, NULL);
b6e676ce	179	if (r < 0)
709f6e46	180	log_warning_errno(r, "Failed to set file attributes on %s: %m", t);
b6e676ce LP	181
	182	log_info("Unpacking QCOW2 file.");
	183
	184	r = qcow2_convert(i->output_fd, converted_fd);
	185	if (r < 0) {
	186	unlink(t);
	187	return log_error_errno(r, "Failed to convert qcow2 image: %m");
	188	}
	189
	190	(void) unlink(i->temp_path);
f9ecfd3b	191	free_and_replace(i->temp_path, t);
b6e676ce LP	192
b6e676ce LP	193	safe_close(i->output_fd);
c10d6bdb	194	i->output_fd = TAKE_FD(converted_fd);
b6e676ce LP	195
	196	return 1;
	197	}
	198
	199	static int raw_import_finish(RawImport *i) {
	200	int r;
	201
	202	assert(i);
	203	assert(i->output_fd >= 0);
	204	assert(i->temp_path);
	205	assert(i->final_path);
	206
	207	/* In case this was a sparse file, make sure the file system is right */
	208	if (i->written_uncompressed > 0) {
	209	if (ftruncate(i->output_fd, i->written_uncompressed) < 0)
	210	return log_error_errno(errno, "Failed to truncate file: %m");
	211	}
	212
	213	r = raw_import_maybe_convert_qcow2(i);
	214	if (r < 0)
	215	return r;
	216
	217	if (S_ISREG(i->st.st_mode)) {
	218	(void) copy_times(i->input_fd, i->output_fd);
	219	(void) copy_xattr(i->input_fd, i->output_fd);
	220	}
	221
	222	if (i->read_only) {
	223	r = import_make_read_only_fd(i->output_fd);
	224	if (r < 0)
	225	return r;
	226	}
	227
d9e2daaf LP	228	if (i->force_local)
d9e2daaf LP	229	(void) rm_rf(i->final_path, REMOVE_ROOT\|REMOVE_PHYSICAL\|REMOVE_SUBVOLUME);
b6e676ce	230
f85ef957 AC	231	r = rename_noreplace(AT_FDCWD, i->temp_path, AT_FDCWD, i->final_path);
	232	if (r < 0)
	233	return log_error_errno(r, "Failed to move image into place: %m");
b6e676ce	234
a1e58e8e	235	i->temp_path = mfree(i->temp_path);
b6e676ce LP	236
	237	return 0;
	238	}
	239
	240	static int raw_import_open_disk(RawImport *i) {
	241	int r;
	242
	243	assert(i);
	244
	245	assert(!i->final_path);
	246	assert(!i->temp_path);
	247	assert(i->output_fd < 0);
	248
605405c6	249	i->final_path = strjoin(i->image_root, "/", i->local, ".raw");
b6e676ce LP	250	if (!i->final_path)
	251	return log_oom();
	252
14bcf25c	253	r = tempfn_random(i->final_path, NULL, &i->temp_path);
b6e676ce LP	254	if (r < 0)
	255	return log_oom();
	256
	257	(void) mkdir_parents_label(i->temp_path, 0700);
	258
	259	i->output_fd = open(i->temp_path, O_RDWR\|O_CREAT\|O_EXCL\|O_NOCTTY\|O_CLOEXEC, 0664);
	260	if (i->output_fd < 0)
	261	return log_error_errno(errno, "Failed to open destination %s: %m", i->temp_path);
	262
db9a4254	263	r = chattr_fd(i->output_fd, FS_NOCOW_FL, FS_NOCOW_FL, NULL);
b6e676ce	264	if (r < 0)
709f6e46	265	log_warning_errno(r, "Failed to set file attributes on %s: %m", i->temp_path);
b6e676ce LP	266
	267	return 0;
	268	}
	269
	270	static int raw_import_try_reflink(RawImport *i) {
	271	off_t p;
	272	int r;
	273
	274	assert(i);
	275	assert(i->input_fd >= 0);
	276	assert(i->output_fd >= 0);
	277
	278	if (i->compress.type != IMPORT_COMPRESS_UNCOMPRESSED)
	279	return 0;
	280
	281	if (!S_ISREG(i->st.st_mode))
	282	return 0;
	283
	284	p = lseek(i->input_fd, 0, SEEK_CUR);
	285	if (p == (off_t) -1)
	286	return log_error_errno(errno, "Failed to read file offset of input file: %m");
	287
	288	/* Let's only try a btrfs reflink, if we are reading from the beginning of the file */
	289	if ((uint64_t) p != (uint64_t) i->buffer_size)
	290	return 0;
	291
	292	r = btrfs_reflink(i->input_fd, i->output_fd);
	293	if (r >= 0)
	294	return 1;
	295
	296	return 0;
	297	}
	298
	299	static int raw_import_write(const void p, size_t sz, void userdata) {
	300	RawImport *i = userdata;
	301	ssize_t n;
	302
b6e676ce LP	303	n = sparse_write(i->output_fd, p, sz, 64);
b6e676ce LP	304	if (n < 0)
e986910e	305	return (int) n;
b6e676ce LP	306	if ((size_t) n < sz)
	307	return -EIO;
	308
	309	i->written_uncompressed += sz;
b6e676ce LP	310
	311	return 0;
	312	}
	313
	314	static int raw_import_process(RawImport *i) {
	315	ssize_t l;
	316	int r;
	317
	318	assert(i);
	319	assert(i->buffer_size < sizeof(i->buffer));
	320
	321	l = read(i->input_fd, i->buffer + i->buffer_size, sizeof(i->buffer) - i->buffer_size);
	322	if (l < 0) {
587fec42 LP	323	if (errno == EAGAIN)
	324	return 0;
	325
b6e676ce LP	326	r = log_error_errno(errno, "Failed to read input file: %m");
	327	goto finish;
	328	}
	329	if (l == 0) {
	330	if (i->compress.type == IMPORT_COMPRESS_UNKNOWN) {
35bca925	331	log_error("Premature end of file.");
b6e676ce LP	332	r = -EIO;
	333	goto finish;
	334	}
	335
	336	r = raw_import_finish(i);
	337	goto finish;
	338	}
	339
	340	i->buffer_size += l;
	341
	342	if (i->compress.type == IMPORT_COMPRESS_UNKNOWN) {
	343	r = import_uncompress_detect(&i->compress, i->buffer, i->buffer_size);
	344	if (r < 0) {
35bca925	345	log_error_errno(r, "Failed to detect file compression: %m");
b6e676ce LP	346	goto finish;
	347	}
	348	if (r == 0) /* Need more data */
	349	return 0;
	350
	351	r = raw_import_open_disk(i);
	352	if (r < 0)
	353	goto finish;
	354
	355	r = raw_import_try_reflink(i);
	356	if (r < 0)
	357	goto finish;
	358	if (r > 0) {
	359	r = raw_import_finish(i);
	360	goto finish;
	361	}
	362	}
	363
	364	r = import_uncompress(&i->compress, i->buffer, i->buffer_size, raw_import_write, i);
	365	if (r < 0) {
	366	log_error_errno(r, "Failed to decode and write: %m");
	367	goto finish;
	368	}
	369
	370	i->written_compressed += i->buffer_size;
	371	i->buffer_size = 0;
	372
	373	raw_import_report_progress(i);
	374
	375	return 0;
	376
	377	finish:
	378	if (i->on_finished)
	379	i->on_finished(i, r, i->userdata);
	380	else
	381	sd_event_exit(i->event, r);
	382
	383	return 0;
	384	}
	385
	386	static int raw_import_on_input(sd_event_source s, int fd, uint32_t revents, void userdata) {
	387	RawImport *i = userdata;
	388
	389	return raw_import_process(i);
	390	}
	391
	392	static int raw_import_on_defer(sd_event_source s, void userdata) {
	393	RawImport *i = userdata;
	394
	395	return raw_import_process(i);
	396	}
	397
	398	int raw_import_start(RawImport i, int fd, const char local, bool force_local, bool read_only) {
	399	int r;
	400
	401	assert(i);
	402	assert(fd >= 0);
	403	assert(local);
	404
	405	if (!machine_name_is_valid(local))
	406	return -EINVAL;
	407
	408	if (i->input_fd >= 0)
	409	return -EBUSY;
410
587fec42 LP	411	r = fd_nonblock(fd, true);
	412	if (r < 0)
	413	return r;
	414
b6e676ce LP	415	r = free_and_strdup(&i->local, local);
	416	if (r < 0)
	417	return r;
	418	i->force_local = force_local;
	419	i->read_only = read_only;
	420
	421	if (fstat(fd, &i->st) < 0)
	422	return -errno;
	423
	424	r = sd_event_add_io(i->event, &i->input_event_source, fd, EPOLLIN, raw_import_on_input, i);
	425	if (r == -EPERM) {
	426	/* This fd does not support epoll, for example because it is a regular file. Busy read in that case */
	427	r = sd_event_add_defer(i->event, &i->input_event_source, raw_import_on_defer, i);
	428	if (r < 0)
	429	return r;
	430
	431	r = sd_event_source_set_enabled(i->input_event_source, SD_EVENT_ON);
	432	}
	433	if (r < 0)
	434	return r;
	435
	436	i->input_fd = fd;
	437	return r;
	438	}