diff options
author | Lennart Poettering <lennart@poettering.net> | 2016-04-26 14:57:04 +0200 |
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committer | Lennart Poettering <lennart@poettering.net> | 2016-04-26 14:57:04 +0200 |
commit | d7fe83bbc23d9976433fddaf6509cc6bebc0ecdd (patch) | |
tree | e5748844e740c3e7452040154fd3035b304eaee8 /src/nspawn/nspawn-settings.c | |
parent | 6e3930c40f3379b7123e505a71ba4cd6db6c372f (diff) | |
parent | 4aeb20f5aaec25ef969989b64d37377913b2a1ef (diff) |
Merge pull request #3093 from poettering/nspawn-userns-magic
nspawn automatic user namespaces
Diffstat (limited to 'src/nspawn/nspawn-settings.c')
-rw-r--r-- | src/nspawn/nspawn-settings.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/src/nspawn/nspawn-settings.c b/src/nspawn/nspawn-settings.c index 4fb0054698..b98a79fd09 100644 --- a/src/nspawn/nspawn-settings.c +++ b/src/nspawn/nspawn-settings.c @@ -25,7 +25,9 @@ #include "parse-util.h" #include "process-util.h" #include "strv.h" +#include "user-util.h" #include "util.h" +#include "string-util.h" int settings_load(FILE *f, const char *path, Settings **ret) { _cleanup_(settings_freep) Settings *s = NULL; @@ -40,9 +42,13 @@ int settings_load(FILE *f, const char *path, Settings **ret) { s->start_mode = _START_MODE_INVALID; s->personality = PERSONALITY_INVALID; + s->userns_mode = _USER_NAMESPACE_MODE_INVALID; + s->uid_shift = UID_INVALID; + s->uid_range = UID_INVALID; s->read_only = -1; s->volatile_mode = _VOLATILE_MODE_INVALID; + s->userns_chown = -1; s->private_network = -1; s->network_veth = -1; @@ -59,6 +65,16 @@ int settings_load(FILE *f, const char *path, Settings **ret) { if (r < 0) return r; + /* Make sure that if userns_mode is set, userns_chown is set to something appropriate, and vice versa. Either + * both fields shall be initialized or neither. */ + if (s->userns_mode == USER_NAMESPACE_PICK) + s->userns_chown = true; + else if (s->userns_mode != _USER_NAMESPACE_MODE_INVALID && s->userns_chown < 0) + s->userns_chown = false; + + if (s->userns_chown >= 0 && s->userns_mode == _USER_NAMESPACE_MODE_INVALID) + s->userns_mode = USER_NAMESPACE_NO; + *ret = s; s = NULL; @@ -392,3 +408,73 @@ conflict: log_syntax(unit, LOG_ERR, filename, line, r, "Conflicting Boot= or ProcessTwo= setting found. Ignoring."); return 0; } + +int config_parse_private_users( + const char *unit, + const char *filename, + unsigned line, + const char *section, + unsigned section_line, + const char *lvalue, + int ltype, + const char *rvalue, + void *data, + void *userdata) { + + Settings *settings = data; + int r; + + assert(filename); + assert(lvalue); + assert(rvalue); + + r = parse_boolean(rvalue); + if (r == 0) { + /* no: User namespacing off */ + settings->userns_mode = USER_NAMESPACE_NO; + settings->uid_shift = UID_INVALID; + settings->uid_range = UINT32_C(0x10000); + } else if (r > 0) { + /* yes: User namespacing on, UID range is read from root dir */ + settings->userns_mode = USER_NAMESPACE_FIXED; + settings->uid_shift = UID_INVALID; + settings->uid_range = UINT32_C(0x10000); + } else if (streq(rvalue, "pick")) { + /* pick: User namespacing on, UID range is picked randomly */ + settings->userns_mode = USER_NAMESPACE_PICK; + settings->uid_shift = UID_INVALID; + settings->uid_range = UINT32_C(0x10000); + } else { + const char *range, *shift; + uid_t sh, rn; + + /* anything else: User namespacing on, UID range is explicitly configured */ + + range = strchr(rvalue, ':'); + if (range) { + shift = strndupa(rvalue, range - rvalue); + range++; + + r = safe_atou32(range, &rn); + if (r < 0 || rn <= 0) { + log_syntax(unit, LOG_ERR, filename, line, r, "UID/GID range invalid, ignoring: %s", range); + return 0; + } + } else { + shift = rvalue; + rn = UINT32_C(0x10000); + } + + r = parse_uid(shift, &sh); + if (r < 0) { + log_syntax(unit, LOG_ERR, filename, line, r, "UID/GID shift invalid, ignoring: %s", range); + return 0; + } + + settings->userns_mode = USER_NAMESPACE_FIXED; + settings->uid_shift = sh; + settings->uid_range = rn; + } + + return 0; +} |