16280725298

Committed 14 Jul 2025 08:16PM UTC coverage: 72.166% (-0.006%) from 72.172%

Build # 16280725298

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Commit Message

Two fixlets for coverage test (#38183)

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71.58

/src/login/user-runtime-dir.c

/* SPDX-License-Identifier: LGPL-2.1-or-later */

#include <linux/magic.h>
#include <sys/mount.h>

#include "sd-bus.h"

#include "bus-error.h"
#include "bus-locator.h"
#include "devnum-util.h"
#include "errno-util.h"
#include "fd-util.h"
#include "format-util.h"
#include "fs-util.h"
#include "label-util.h"
#include "limits-util.h"
#include "log.h"
#include "main-func.h"
#include "mkdir-label.h"
#include "mount-util.h"
#include "mountpoint-util.h"
#include "path-util.h"
#include "quota-util.h"
#include "rm-rf.h"
#include "set.h"
#include "smack-util.h"
#include "stat-util.h"
#include "stdio-util.h"
#include "string-util.h"
#include "strv.h"
#include "user-util.h"
#include "userdb.h"

static int acquire_runtime_dir_properties(uint64_t *ret_size, uint64_t *ret_inodes) {
        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
        _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
        uint64_t size, inodes;
        int r;

        assert(ret_size);
        assert(ret_inodes);

        r = sd_bus_default_system(&bus);
        if (r < 0)
                return log_error_errno(r, "Failed to connect to system bus: %m");

        r = bus_get_property_trivial(bus, bus_login_mgr, "RuntimeDirectorySize", &error, 't', &size);
        if (r < 0) {
                log_warning_errno(r, "Failed to acquire runtime directory size, ignoring: %s", bus_error_message(&error, r));
                sd_bus_error_free(&error);

                size = physical_memory_scale(10U, 100U); /* 10% */
        }

        r = bus_get_property_trivial(bus, bus_login_mgr, "RuntimeDirectoryInodesMax", &error, 't', &inodes);
        if (r < 0) {
                log_warning_errno(r, "Failed to acquire number of inodes for runtime directory, ignoring: %s", bus_error_message(&error, r));
                sd_bus_error_free(&error);

                inodes = DIV_ROUND_UP(size, 4096);
        }

        *ret_size = size;
        *ret_inodes = inodes;

        return 0;
}

static int user_mkdir_runtime_path(
                const char *runtime_path,
                uid_t uid,
                gid_t gid,
                uint64_t runtime_dir_size,
                uint64_t runtime_dir_inodes) {

        int r;

        assert(runtime_path);
        assert(path_is_absolute(runtime_path));
        assert(uid_is_valid(uid));
        assert(gid_is_valid(gid));

        r = mkdir_safe_label("/run/user", 0755, 0, 0, MKDIR_WARN_MODE);
        if (r < 0)
                return log_error_errno(r, "Failed to create /run/user: %m");

        if (path_is_mount_point(runtime_path) > 0)
                log_debug("%s is already a mount point", runtime_path);
        else {
                char options[STRLEN("mode=0700,uid=,gid=,size=,nr_inodes=,smackfsroot=*")
                             + DECIMAL_STR_MAX(uid_t)
                             + DECIMAL_STR_MAX(gid_t)
                             + DECIMAL_STR_MAX(uint64_t)
                             + DECIMAL_STR_MAX(uint64_t)];

                xsprintf(options,
                         "mode=0700,uid=" UID_FMT ",gid=" GID_FMT ",size=%" PRIu64 ",nr_inodes=%" PRIu64 "%s",
                         uid, gid, runtime_dir_size, runtime_dir_inodes,
                         mac_smack_use() ? ",smackfsroot=*" : "");

                _cleanup_free_ char *d = strdup(runtime_path);
                if (!d)
                        return log_oom();

                r = mkdir_label(runtime_path, 0700);
                if (r < 0 && r != -EEXIST)
                        return log_error_errno(r, "Failed to create %s: %m", runtime_path);

                _cleanup_(rmdir_and_freep) char *destroy = TAKE_PTR(d); /* auto-destroy */

                r = mount_nofollow_verbose(LOG_DEBUG, "tmpfs", runtime_path, "tmpfs", MS_NODEV|MS_NOSUID, options);
                if (r < 0) {
                        if (!ERRNO_IS_PRIVILEGE(r))
                                return log_error_errno(r, "Failed to mount per-user tmpfs directory %s: %m", runtime_path);

                        log_debug_errno(r,
                                        "Failed to mount per-user tmpfs directory %s.\n"
                                        "Assuming containerized execution, ignoring: %m", runtime_path);

                        r = chmod_and_chown(runtime_path, 0700, uid, gid);
                        if (r < 0)
                                return log_error_errno(r, "Failed to change ownership and mode of \"%s\": %m", runtime_path);
                }

                destroy = mfree(destroy); /* deactivate auto-destroy */

                r = label_fix(runtime_path, 0);
                if (r < 0)
                        log_warning_errno(r, "Failed to fix label of \"%s\", ignoring: %m", runtime_path);
        }

        return 0;
}

static int do_mount(UserRecord *ur) {
        int r;

        assert(ur);

        if (!uid_is_valid(ur->uid) || !gid_is_valid(user_record_gid(ur)))
                return log_error_errno(SYNTHETIC_ERRNO(ENOMSG), "User '%s' lacks UID or GID, refusing.", ur->user_name);

        uint64_t runtime_dir_size, runtime_dir_inodes;
        r = acquire_runtime_dir_properties(&runtime_dir_size, &runtime_dir_inodes);
        if (r < 0)
                return r;

        char runtime_path[STRLEN("/run/user/") + DECIMAL_STR_MAX(uid_t)];
        xsprintf(runtime_path, "/run/user/" UID_FMT, ur->uid);

        log_debug("Will mount %s owned by "UID_FMT":"GID_FMT, runtime_path, ur->uid, user_record_gid(ur));
        return user_mkdir_runtime_path(runtime_path, ur->uid, user_record_gid(ur), runtime_dir_size, runtime_dir_inodes);
}

static int user_remove_runtime_path(const char *runtime_path) {
        int r;

        assert(runtime_path);
        assert(path_is_absolute(runtime_path));

        r = rm_rf(runtime_path, 0);
        if (r < 0)
                log_debug_errno(r, "Failed to remove runtime directory %s (before unmounting), ignoring: %m", runtime_path);

        /* Ignore cases where the directory isn't mounted, as that's quite possible, if we lacked the permissions to
         * mount something */
        r = RET_NERRNO(umount2(runtime_path, MNT_DETACH));
        if (r < 0 && !IN_SET(r, -EINVAL, -ENOENT))
                log_debug_errno(r, "Failed to unmount user runtime directory %s, ignoring: %m", runtime_path);

        r = rm_rf(runtime_path, REMOVE_ROOT);
        if (r < 0 && r != -ENOENT)
                return log_error_errno(r, "Failed to remove runtime directory %s (after unmounting): %m", runtime_path);

        return 0;
}

static int do_umount(const char *user) {
        char runtime_path[STRLEN("/run/user/") + DECIMAL_STR_MAX(uid_t)];
        uid_t uid;
        int r;

        /* The user may be already removed. So, first try to parse the string by parse_uid(),
         * and if it fails, fall back to get_user_creds(). */
        if (parse_uid(user, &uid) < 0) {
                r = get_user_creds(&user, &uid, NULL, NULL, NULL, 0);
                if (r < 0)
                        return log_error_errno(r,
                                               r == -ESRCH ? "No such user \"%s\"" :
                                               r == -ENOMSG ? "UID \"%s\" is invalid or has an invalid main group"
                                                            : "Failed to look up user \"%s\": %m",
                                               user);
        }

        xsprintf(runtime_path, "/run/user/" UID_FMT, uid);

        log_debug("Will remove %s", runtime_path);
        return user_remove_runtime_path(runtime_path);
}

static int apply_tmpfs_quota(
                char **paths,
                uid_t uid,
                uint64_t limit,
                uint32_t scale) {

        _cleanup_set_free_ Set *processed = NULL;
        int r;

        assert(uid_is_valid(uid));

        STRV_FOREACH(p, paths) {
                _cleanup_close_ int fd = open(*p, O_DIRECTORY|O_CLOEXEC);
                if (fd < 0) {
                        log_warning_errno(errno, "Failed to open '%s' in order to set quota, ignoring: %m", *p);
                        continue;
                }

                struct stat st;
                if (fstat(fd, &st) < 0) {
                        log_warning_errno(errno, "Failed to stat '%s' in order to set quota, ignoring: %m", *p);
                        continue;
                }

                /* Cover for bind mounted or symlinked /var/tmp/ + /tmp/ */
                if (set_contains(processed, DEVNUM_TO_PTR(st.st_dev))) {
                        log_debug("Not setting quota on '%s', since already processed.", *p);
                        continue;
                }

                /* Remember we already dealt with this fs, even if the subsequent operation fails, since
                 * there's no point in appyling quota twice, regardless if it succeeds or not. */
                if (set_ensure_put(&processed, /* hash_ops= */ NULL, DEVNUM_TO_PTR(st.st_dev)) < 0)
                        return log_oom();

                struct statfs sfs;
                if (fstatfs(fd, &sfs) < 0) {
                        log_warning_errno(errno, "Failed to statfs '%s' in order to set quota, ignoring: %m", *p);
                        continue;
                }

                if (!is_fs_type(&sfs, TMPFS_MAGIC)) {
                        log_debug("Not setting quota on '%s', since not tmpfs.", *p);
                        continue;
                }

                struct dqblk req;
                r = RET_NERRNO(quotactl_fd(fd, QCMD_FIXED(Q_GETQUOTA, USRQUOTA), uid, &req));
                if (r == -ESRCH)
                        zero(req);
                else if (ERRNO_IS_NEG_NOT_SUPPORTED(r)) {
                        log_debug_errno(r, "No UID quota support on %s, not setting quota: %m", *p);
                        continue;
                } else if (ERRNO_IS_NEG_PRIVILEGE(r)) {
                        log_debug_errno(r, "Lacking privileges to query UID quota on %s, not setting quota: %m", *p);
                        continue;
                } else if (r < 0) {
                        log_warning_errno(r, "Failed to query disk quota on %s for UID " UID_FMT ", ignoring: %m", *p, uid);
                        continue;
                }

                uint64_t v =
                        (scale == 0) ? 0 :
                        (scale == UINT32_MAX) ? UINT64_MAX :
                        (uint64_t) ((double) (sfs.f_blocks * sfs.f_frsize) * scale / UINT32_MAX);

                v = MIN(v, limit);
                v /= QIF_DQBLKSIZE;

                if (FLAGS_SET(req.dqb_valid, QIF_BLIMITS) && v == req.dqb_bhardlimit) {
                        /* Shortcut things if everything is set up properly already */
                        log_debug("Configured quota on '%s' already matches the intended setting, not updating quota.", *p);
                        continue;
                }

                req.dqb_valid = QIF_BLIMITS;
                req.dqb_bsoftlimit = req.dqb_bhardlimit = v;

                r = RET_NERRNO(quotactl_fd(fd, QCMD_FIXED(Q_SETQUOTA, USRQUOTA), uid, &req));
                if (r == -ESRCH) {
                        log_debug_errno(r, "Not setting UID quota on %s since UID quota is not supported: %m", *p);
                        continue;
                } else if (ERRNO_IS_NEG_PRIVILEGE(r)) {
                        log_debug_errno(r, "Lacking privileges to set UID quota on %s, skipping: %m", *p);
                        continue;
                } else if (r < 0) {
                        log_warning_errno(r, "Failed to set disk quota limit to '%s' on %s for UID " UID_FMT ", ignoring: %m", FORMAT_BYTES(v), *p, uid);
                        continue;
                }

                log_info("Successfully configured disk quota for UID " UID_FMT " on %s to %s", uid, *p, FORMAT_BYTES(v * QIF_DQBLKSIZE));
        }

        return 0;
}

static int do_tmpfs_quota(UserRecord *ur) {
        int r;

        assert(ur);

        if (user_record_is_root(ur)) {
                log_debug("Not applying tmpfs quota to root user.");
                return 0;
        }

        if (!uid_is_valid(ur->uid))
                return log_error_errno(SYNTHETIC_ERRNO(ENOMSG), "User '%s' lacks UID, refusing.", ur->user_name);

        r = apply_tmpfs_quota(STRV_MAKE("/tmp", "/var/tmp"), ur->uid, ur->tmp_limit.limit, user_record_tmp_limit_scale(ur));
        if (r < 0)
                return r;

        r = apply_tmpfs_quota(STRV_MAKE("/dev/shm"), ur->uid, ur->dev_shm_limit.limit, user_record_dev_shm_limit_scale(ur));
        if (r < 0)
                return r;

        return 0;
}

static int run(int argc, char *argv[]) {
        int r;

        log_setup();

        if (argc != 3)
                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "This program takes two arguments.");

        const char *verb = argv[1], *user = argv[2];

        if (!STR_IN_SET(verb, "start", "stop"))
                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "First argument must be either \"start\" or \"stop\".");

        umask(0022);

        r = mac_init();
        if (r < 0)
                return r;

        if (streq(verb, "start")) {
                _cleanup_(user_record_unrefp) UserRecord *ur = NULL;
                r = userdb_by_name(user, /* match= */ NULL, USERDB_PARSE_NUMERIC|USERDB_SUPPRESS_SHADOW, &ur);
                if (r == -ESRCH)
                        return log_error_errno(r, "User '%s' does not exist: %m", user);
                if (r < 0)
                        return log_error_errno(r, "Failed to resolve user '%s': %m", user);

                /* We do two things here: mount the per-user XDG_RUNTIME_DIR, and set up tmpfs quota on /tmp/
                 * and /dev/shm/. */

                r = 0;
                RET_GATHER(r, do_mount(ur));
                RET_GATHER(r, do_tmpfs_quota(ur));
                return r;
        }

        if (streq(verb, "stop"))
                return do_umount(user);

        assert_not_reached();
}

DEFINE_MAIN_FUNCTION(run);

1	/* SPDX-License-Identifier: LGPL-2.1-or-later */
2
3	#include <linux/magic.h>
4	#include <sys/mount.h>
5
6	#include "sd-bus.h"
7
8	#include "bus-error.h"
9	#include "bus-locator.h"
10	#include "devnum-util.h"
11	#include "errno-util.h"
12	#include "fd-util.h"
13	#include "format-util.h"
14	#include "fs-util.h"
15	#include "label-util.h"
16	#include "limits-util.h"
17	#include "log.h"
18	#include "main-func.h"
19	#include "mkdir-label.h"
20	#include "mount-util.h"
21	#include "mountpoint-util.h"
22	#include "path-util.h"
23	#include "quota-util.h"
24	#include "rm-rf.h"
25	#include "set.h"
26	#include "smack-util.h"
27	#include "stat-util.h"
28	#include "stdio-util.h"
29	#include "string-util.h"
30	#include "strv.h"
31	#include "user-util.h"
32	#include "userdb.h"
33
34	static int acquire_runtime_dir_properties(uint64_t ret_size, uint64_t ret_inodes) {	179✔
35	_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;	×
36	_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;	179✔
37	uint64_t size, inodes;	179✔
38	int r;	179✔
39
40	assert(ret_size);	179✔
41	assert(ret_inodes);	179✔
42
43	r = sd_bus_default_system(&bus);	179✔
44	if (r < 0)	179✔
45	return log_error_errno(r, "Failed to connect to system bus: %m");	×
46
47	r = bus_get_property_trivial(bus, bus_login_mgr, "RuntimeDirectorySize", &error, 't', &size);	179✔
48	if (r < 0) {	179✔
49	log_warning_errno(r, "Failed to acquire runtime directory size, ignoring: %s", bus_error_message(&error, r));	×
50	sd_bus_error_free(&error);	×
51
52	size = physical_memory_scale(10U, 100U); /* 10% */	×
53	}
54
55	r = bus_get_property_trivial(bus, bus_login_mgr, "RuntimeDirectoryInodesMax", &error, 't', &inodes);	179✔
56	if (r < 0) {	179✔
57	log_warning_errno(r, "Failed to acquire number of inodes for runtime directory, ignoring: %s", bus_error_message(&error, r));	×
58	sd_bus_error_free(&error);	×
59
60	inodes = DIV_ROUND_UP(size, 4096);	×
61	}
62
63	*ret_size = size;	179✔
64	*ret_inodes = inodes;	179✔
65
66	return 0;	179✔
67	}
68
69	static int user_mkdir_runtime_path(	179✔
70	const char *runtime_path,
71	uid_t uid,
72	gid_t gid,
73	uint64_t runtime_dir_size,
74	uint64_t runtime_dir_inodes) {
75
76	int r;	179✔
77
78	assert(runtime_path);	179✔
79	assert(path_is_absolute(runtime_path));	179✔
80	assert(uid_is_valid(uid));	179✔
81	assert(gid_is_valid(gid));	179✔
82
83	r = mkdir_safe_label("/run/user", 0755, 0, 0, MKDIR_WARN_MODE);	179✔
84	if (r < 0)	179✔
85	return log_error_errno(r, "Failed to create /run/user: %m");	×
86
87	if (path_is_mount_point(runtime_path) > 0)	179✔
88	log_debug("%s is already a mount point", runtime_path);	×
89	else {
90	char options[STRLEN("mode=0700,uid=,gid=,size=,nr_inodes=,smackfsroot=*")	179✔
91	+ DECIMAL_STR_MAX(uid_t)
92	+ DECIMAL_STR_MAX(gid_t)
93	+ DECIMAL_STR_MAX(uint64_t)
94	+ DECIMAL_STR_MAX(uint64_t)];
95
96	xsprintf(options,	358✔
97	"mode=0700,uid=" UID_FMT ",gid=" GID_FMT ",size=%" PRIu64 ",nr_inodes=%" PRIu64 "%s",
98	uid, gid, runtime_dir_size, runtime_dir_inodes,
99	mac_smack_use() ? ",smackfsroot=*" : "");
100
101	_cleanup_free_ char *d = strdup(runtime_path);	179✔
102	if (!d)	179✔
103	return log_oom();	×
104
105	r = mkdir_label(runtime_path, 0700);	179✔
106	if (r < 0 && r != -EEXIST)	179✔
107	return log_error_errno(r, "Failed to create %s: %m", runtime_path);	×
108
109	_cleanup_(rmdir_and_freep) char destroy = TAKE_PTR(d); / auto-destroy */	×
110
111	r = mount_nofollow_verbose(LOG_DEBUG, "tmpfs", runtime_path, "tmpfs", MS_NODEV\|MS_NOSUID, options);	179✔
112	if (r < 0) {	179✔
113	if (!ERRNO_IS_PRIVILEGE(r))	×
114	return log_error_errno(r, "Failed to mount per-user tmpfs directory %s: %m", runtime_path);	×
115
116	log_debug_errno(r,	×
117	"Failed to mount per-user tmpfs directory %s.\n"
118	"Assuming containerized execution, ignoring: %m", runtime_path);
119
120	r = chmod_and_chown(runtime_path, 0700, uid, gid);	×
121	if (r < 0)	×
122	return log_error_errno(r, "Failed to change ownership and mode of \"%s\": %m", runtime_path);	×
123	}
124
125	destroy = mfree(destroy); /* deactivate auto-destroy */	179✔
126
127	r = label_fix(runtime_path, 0);	179✔
128	if (r < 0)	179✔
129	log_warning_errno(r, "Failed to fix label of \"%s\", ignoring: %m", runtime_path);	179✔
130	}
131
132	return 0;
133	}
134
135	static int do_mount(UserRecord *ur) {	179✔
136	int r;	179✔
137
138	assert(ur);	179✔
139
140	if (!uid_is_valid(ur->uid) \|\| !gid_is_valid(user_record_gid(ur)))	179✔
141	return log_error_errno(SYNTHETIC_ERRNO(ENOMSG), "User '%s' lacks UID or GID, refusing.", ur->user_name);	×
142
143	uint64_t runtime_dir_size, runtime_dir_inodes;	179✔
144	r = acquire_runtime_dir_properties(&runtime_dir_size, &runtime_dir_inodes);	179✔
145	if (r < 0)	179✔
146	return r;
147
148	char runtime_path[STRLEN("/run/user/") + DECIMAL_STR_MAX(uid_t)];	179✔
149	xsprintf(runtime_path, "/run/user/" UID_FMT, ur->uid);	179✔
150
151	log_debug("Will mount %s owned by "UID_FMT":"GID_FMT, runtime_path, ur->uid, user_record_gid(ur));	179✔
152	return user_mkdir_runtime_path(runtime_path, ur->uid, user_record_gid(ur), runtime_dir_size, runtime_dir_inodes);	179✔
153	}
154
155	static int user_remove_runtime_path(const char *runtime_path) {	179✔
156	int r;	179✔
157
158	assert(runtime_path);	179✔
159	assert(path_is_absolute(runtime_path));	179✔
160
161	r = rm_rf(runtime_path, 0);	179✔
162	if (r < 0)	179✔
163	log_debug_errno(r, "Failed to remove runtime directory %s (before unmounting), ignoring: %m", runtime_path);	×
164
165	/* Ignore cases where the directory isn't mounted, as that's quite possible, if we lacked the permissions to
166	* mount something */
167	r = RET_NERRNO(umount2(runtime_path, MNT_DETACH));	179✔
168	if (r < 0 && !IN_SET(r, -EINVAL, -ENOENT))	×
169	log_debug_errno(r, "Failed to unmount user runtime directory %s, ignoring: %m", runtime_path);	×
170
171	r = rm_rf(runtime_path, REMOVE_ROOT);	179✔
172	if (r < 0 && r != -ENOENT)	179✔
173	return log_error_errno(r, "Failed to remove runtime directory %s (after unmounting): %m", runtime_path);	×
174
175	return 0;
176	}
177
178	static int do_umount(const char *user) {	179✔
179	char runtime_path[STRLEN("/run/user/") + DECIMAL_STR_MAX(uid_t)];	179✔
180	uid_t uid;	179✔
181	int r;	179✔
182
183	/* The user may be already removed. So, first try to parse the string by parse_uid(),
184	* and if it fails, fall back to get_user_creds(). */
185	if (parse_uid(user, &uid) < 0) {	179✔
186	r = get_user_creds(&user, &uid, NULL, NULL, NULL, 0);	×
187	if (r < 0)	×
188	return log_error_errno(r,	×
189	r == -ESRCH ? "No such user \"%s\"" :
190	r == -ENOMSG ? "UID \"%s\" is invalid or has an invalid main group"
191	: "Failed to look up user \"%s\": %m",
192	user);
193	}
194
195	xsprintf(runtime_path, "/run/user/" UID_FMT, uid);	179✔
196
197	log_debug("Will remove %s", runtime_path);	179✔
198	return user_remove_runtime_path(runtime_path);	179✔
199	}
200
201	static int apply_tmpfs_quota(	234✔
202	char **paths,
203	uid_t uid,
204	uint64_t limit,
205	uint32_t scale) {
206
207	_cleanup_set_free_ Set *processed = NULL;	234✔
208	int r;	234✔
209
210	assert(uid_is_valid(uid));	234✔
211
212	STRV_FOREACH(p, paths) {	585✔
213	_cleanup_close_ int fd = open(*p, O_DIRECTORY\|O_CLOEXEC);	702✔
214	if (fd < 0) {	351✔
215	log_warning_errno(errno, "Failed to open '%s' in order to set quota, ignoring: %m", *p);	×
216	continue;	×
217	}
218
219	struct stat st;	351✔
220	if (fstat(fd, &st) < 0) {	351✔
221	log_warning_errno(errno, "Failed to stat '%s' in order to set quota, ignoring: %m", *p);	×
222	continue;	×
223	}
224
225	/* Cover for bind mounted or symlinked /var/tmp/ + /tmp/ */
226	if (set_contains(processed, DEVNUM_TO_PTR(st.st_dev))) {	351✔
227	log_debug("Not setting quota on '%s', since already processed.", *p);	×
228	continue;	×
229	}
230
231	/* Remember we already dealt with this fs, even if the subsequent operation fails, since
232	* there's no point in appyling quota twice, regardless if it succeeds or not. */
233	if (set_ensure_put(&processed, /* hash_ops= */ NULL, DEVNUM_TO_PTR(st.st_dev)) < 0)	351✔
234	return log_oom();	×
235
236	struct statfs sfs;	351✔
237	if (fstatfs(fd, &sfs) < 0) {	351✔
238	log_warning_errno(errno, "Failed to statfs '%s' in order to set quota, ignoring: %m", *p);	×
239	continue;	×
240	}
241
242	if (!is_fs_type(&sfs, TMPFS_MAGIC)) {	351✔
243	log_debug("Not setting quota on '%s', since not tmpfs.", *p);	117✔
244	continue;	117✔
245	}
246
247	struct dqblk req;	234✔
248	r = RET_NERRNO(quotactl_fd(fd, QCMD_FIXED(Q_GETQUOTA, USRQUOTA), uid, &req));	234✔
249	if (r == -ESRCH)	130✔
250	zero(req);	×
251	else if (ERRNO_IS_NEG_NOT_SUPPORTED(r)) {	234✔
252	log_debug_errno(r, "No UID quota support on %s, not setting quota: %m", *p);	×
253	continue;	×
254	} else if (ERRNO_IS_NEG_PRIVILEGE(r)) {	234✔
255	log_debug_errno(r, "Lacking privileges to query UID quota on %s, not setting quota: %m", *p);	130✔
256	continue;	130✔
257	} else if (r < 0) {	104✔
258	log_warning_errno(r, "Failed to query disk quota on %s for UID " UID_FMT ", ignoring: %m", *p, uid);	×
259	continue;	×
260	}
261
262	uint64_t v =	208✔
263	(scale == 0) ? 0 :	104✔
264	(scale == UINT32_MAX) ? UINT64_MAX :	104✔
265	(uint64_t) ((double) (sfs.f_blocks * sfs.f_frsize) * scale / UINT32_MAX);	104✔
266
267	v = MIN(v, limit);	104✔
268	v /= QIF_DQBLKSIZE;	104✔
269
270	if (FLAGS_SET(req.dqb_valid, QIF_BLIMITS) && v == req.dqb_bhardlimit) {	104✔
271	/* Shortcut things if everything is set up properly already */
272	log_debug("Configured quota on '%s' already matches the intended setting, not updating quota.", *p);	6✔
273	continue;	6✔
274	}
275
276	req.dqb_valid = QIF_BLIMITS;	98✔
277	req.dqb_bsoftlimit = req.dqb_bhardlimit = v;	98✔
278
279	r = RET_NERRNO(quotactl_fd(fd, QCMD_FIXED(Q_SETQUOTA, USRQUOTA), uid, &req));	98✔
280	if (r == -ESRCH) {	×
281	log_debug_errno(r, "Not setting UID quota on %s since UID quota is not supported: %m", *p);	×
282	continue;	×
283	} else if (ERRNO_IS_NEG_PRIVILEGE(r)) {	98✔
284	log_debug_errno(r, "Lacking privileges to set UID quota on %s, skipping: %m", *p);	×
285	continue;	×
286	} else if (r < 0) {	98✔
287	log_warning_errno(r, "Failed to set disk quota limit to '%s' on %s for UID " UID_FMT ", ignoring: %m", FORMAT_BYTES(v), *p, uid);	×
288	continue;	×
289	}
290
291	log_info("Successfully configured disk quota for UID " UID_FMT " on %s to %s", uid, p, FORMAT_BYTES(v QIF_DQBLKSIZE));	98✔
292	}
293
294	return 0;
295	}
296
297	static int do_tmpfs_quota(UserRecord *ur) {	179✔
298	int r;	179✔
299
300	assert(ur);	179✔
301
302	if (user_record_is_root(ur)) {	179✔
303	log_debug("Not applying tmpfs quota to root user.");	62✔
304	return 0;	62✔
305	}
306
307	if (!uid_is_valid(ur->uid))	117✔
308	return log_error_errno(SYNTHETIC_ERRNO(ENOMSG), "User '%s' lacks UID, refusing.", ur->user_name);	×
309
310	r = apply_tmpfs_quota(STRV_MAKE("/tmp", "/var/tmp"), ur->uid, ur->tmp_limit.limit, user_record_tmp_limit_scale(ur));	117✔
311	if (r < 0)	117✔
312	return r;
313
314	r = apply_tmpfs_quota(STRV_MAKE("/dev/shm"), ur->uid, ur->dev_shm_limit.limit, user_record_dev_shm_limit_scale(ur));	117✔
315	if (r < 0)	117✔
316	return r;	×
317
318	return 0;
319	}
320
321	static int run(int argc, char *argv[]) {	358✔
322	int r;	358✔
323
324	log_setup();	358✔
325
326	if (argc != 3)	358✔
327	return log_error_errno(SYNTHETIC_ERRNO(EINVAL),	358✔
328	"This program takes two arguments.");
329
330	const char verb = argv[1], user = argv[2];	358✔
331
332	if (!STR_IN_SET(verb, "start", "stop"))	358✔
333	return log_error_errno(SYNTHETIC_ERRNO(EINVAL),	×
334	"First argument must be either \"start\" or \"stop\".");
335
336	umask(0022);	358✔
337
338	r = mac_init();	358✔
339	if (r < 0)	358✔
340	return r;
341
342	if (streq(verb, "start")) {	358✔
343	_cleanup_(user_record_unrefp) UserRecord *ur = NULL;	179✔
344	r = userdb_by_name(user, /* match= */ NULL, USERDB_PARSE_NUMERIC\|USERDB_SUPPRESS_SHADOW, &ur);	179✔
345	if (r == -ESRCH)	179✔
346	return log_error_errno(r, "User '%s' does not exist: %m", user);	×
347	if (r < 0)	179✔
348	return log_error_errno(r, "Failed to resolve user '%s': %m", user);	×
349
350	/* We do two things here: mount the per-user XDG_RUNTIME_DIR, and set up tmpfs quota on /tmp/
351	* and /dev/shm/. */
352
353	r = 0;	179✔
354	RET_GATHER(r, do_mount(ur));	179✔
355	RET_GATHER(r, do_tmpfs_quota(ur));	179✔
356	return r;	179✔
357	}
358
359	if (streq(verb, "stop"))	179✔
360	return do_umount(user);	179✔
361
362	assert_not_reached();	×
363	}
364
365	DEFINE_MAIN_FUNCTION(run);	358✔

systemd / systemd / 16280725298

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