^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #include <linux/quota.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * qid_eq - Test to see if to kquid values are the same
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * @left: A qid value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * @right: Another quid value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Return true if the two qid values are equal and false otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) bool qid_eq(struct kqid left, struct kqid right)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) if (left.type != right.type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) switch(left.type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) case USRQUOTA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) return uid_eq(left.uid, right.uid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) case GRPQUOTA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) return gid_eq(left.gid, right.gid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) case PRJQUOTA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) return projid_eq(left.projid, right.projid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) EXPORT_SYMBOL(qid_eq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * qid_lt - Test to see if one qid value is less than another
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * @left: The possibly lesser qid value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * @right: The possibly greater qid value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * Return true if left is less than right and false otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) bool qid_lt(struct kqid left, struct kqid right)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) if (left.type < right.type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) if (left.type > right.type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) switch (left.type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) case USRQUOTA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return uid_lt(left.uid, right.uid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) case GRPQUOTA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) return gid_lt(left.gid, right.gid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) case PRJQUOTA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return projid_lt(left.projid, right.projid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) EXPORT_SYMBOL(qid_lt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * from_kqid - Create a qid from a kqid user-namespace pair.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * @targ: The user namespace we want a qid in.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * @kqid: The kernel internal quota identifier to start with.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * Map @kqid into the user-namespace specified by @targ and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * return the resulting qid.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) * There is always a mapping into the initial user_namespace.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * If @kqid has no mapping in @targ (qid_t)-1 is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) qid_t from_kqid(struct user_namespace *targ, struct kqid kqid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) switch (kqid.type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) case USRQUOTA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return from_kuid(targ, kqid.uid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) case GRPQUOTA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) return from_kgid(targ, kqid.gid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) case PRJQUOTA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return from_kprojid(targ, kqid.projid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) EXPORT_SYMBOL(from_kqid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * from_kqid_munged - Create a qid from a kqid user-namespace pair.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * @targ: The user namespace we want a qid in.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * @kqid: The kernel internal quota identifier to start with.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) * Map @kqid into the user-namespace specified by @targ and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * return the resulting qid.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) * There is always a mapping into the initial user_namespace.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * Unlike from_kqid from_kqid_munged never fails and always
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * returns a valid projid. This makes from_kqid_munged
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * appropriate for use in places where failing to provide
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * a qid_t is not a good option.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * If @kqid has no mapping in @targ the kqid.type specific
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * overflow identifier is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) qid_t from_kqid_munged(struct user_namespace *targ, struct kqid kqid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) switch (kqid.type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) case USRQUOTA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return from_kuid_munged(targ, kqid.uid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) case GRPQUOTA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) return from_kgid_munged(targ, kqid.gid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) case PRJQUOTA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) return from_kprojid_munged(targ, kqid.projid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) EXPORT_SYMBOL(from_kqid_munged);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) * qid_valid - Report if a valid value is stored in a kqid.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) * @qid: The kernel internal quota identifier to test.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) bool qid_valid(struct kqid qid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) switch (qid.type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) case USRQUOTA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return uid_valid(qid.uid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) case GRPQUOTA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return gid_valid(qid.gid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) case PRJQUOTA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) return projid_valid(qid.projid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) EXPORT_SYMBOL(qid_valid);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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