From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/fs/quota/kqid.c | 132 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 132 insertions(+) create mode 100644 kernel/fs/quota/kqid.c (limited to 'kernel/fs/quota/kqid.c') diff --git a/kernel/fs/quota/kqid.c b/kernel/fs/quota/kqid.c new file mode 100644 index 000000000..ebc5e6285 --- /dev/null +++ b/kernel/fs/quota/kqid.c @@ -0,0 +1,132 @@ +#include +#include +#include + +/** + * qid_eq - Test to see if to kquid values are the same + * @left: A qid value + * @right: Another quid value + * + * Return true if the two qid values are equal and false otherwise. + */ +bool qid_eq(struct kqid left, struct kqid right) +{ + if (left.type != right.type) + return false; + switch(left.type) { + case USRQUOTA: + return uid_eq(left.uid, right.uid); + case GRPQUOTA: + return gid_eq(left.gid, right.gid); + case PRJQUOTA: + return projid_eq(left.projid, right.projid); + default: + BUG(); + } +} +EXPORT_SYMBOL(qid_eq); + +/** + * qid_lt - Test to see if one qid value is less than another + * @left: The possibly lesser qid value + * @right: The possibly greater qid value + * + * Return true if left is less than right and false otherwise. + */ +bool qid_lt(struct kqid left, struct kqid right) +{ + if (left.type < right.type) + return true; + if (left.type > right.type) + return false; + switch (left.type) { + case USRQUOTA: + return uid_lt(left.uid, right.uid); + case GRPQUOTA: + return gid_lt(left.gid, right.gid); + case PRJQUOTA: + return projid_lt(left.projid, right.projid); + default: + BUG(); + } +} +EXPORT_SYMBOL(qid_lt); + +/** + * from_kqid - Create a qid from a kqid user-namespace pair. + * @targ: The user namespace we want a qid in. + * @kqid: The kernel internal quota identifier to start with. + * + * Map @kqid into the user-namespace specified by @targ and + * return the resulting qid. + * + * There is always a mapping into the initial user_namespace. + * + * If @kqid has no mapping in @targ (qid_t)-1 is returned. + */ +qid_t from_kqid(struct user_namespace *targ, struct kqid kqid) +{ + switch (kqid.type) { + case USRQUOTA: + return from_kuid(targ, kqid.uid); + case GRPQUOTA: + return from_kgid(targ, kqid.gid); + case PRJQUOTA: + return from_kprojid(targ, kqid.projid); + default: + BUG(); + } +} +EXPORT_SYMBOL(from_kqid); + +/** + * from_kqid_munged - Create a qid from a kqid user-namespace pair. + * @targ: The user namespace we want a qid in. + * @kqid: The kernel internal quota identifier to start with. + * + * Map @kqid into the user-namespace specified by @targ and + * return the resulting qid. + * + * There is always a mapping into the initial user_namespace. + * + * Unlike from_kqid from_kqid_munged never fails and always + * returns a valid projid. This makes from_kqid_munged + * appropriate for use in places where failing to provide + * a qid_t is not a good option. + * + * If @kqid has no mapping in @targ the kqid.type specific + * overflow identifier is returned. + */ +qid_t from_kqid_munged(struct user_namespace *targ, struct kqid kqid) +{ + switch (kqid.type) { + case USRQUOTA: + return from_kuid_munged(targ, kqid.uid); + case GRPQUOTA: + return from_kgid_munged(targ, kqid.gid); + case PRJQUOTA: + return from_kprojid_munged(targ, kqid.projid); + default: + BUG(); + } +} +EXPORT_SYMBOL(from_kqid_munged); + +/** + * qid_valid - Report if a valid value is stored in a kqid. + * @qid: The kernel internal quota identifier to test. + */ +bool qid_valid(struct kqid qid) +{ + switch (qid.type) { + case USRQUOTA: + return uid_valid(qid.uid); + case GRPQUOTA: + return gid_valid(qid.gid); + case PRJQUOTA: + return projid_valid(qid.projid); + default: + BUG(); + } +} +EXPORT_SYMBOL(qid_valid); -- cgit 1.2.3-korg