IPC: get rid of the use *_setbuf structure.
All IPCs make use of an intermetiate *_setbuf structure to handle the IPC_SET command. This is not really needed and, moreover, it complicates a little bit the code. This patch gets rid of the use of it and uses directly the semid64_ds/ msgid64_ds/shmid64_ds structure. In addition of removing one struture declaration, it also simplifies and improves a little bit the common 64-bits path. Signed-off-by: Pierre Peiffer <pierre.peiffer@bull.net> Acked-by: Serge Hallyn <serue@us.ibm.com> Cc: Nadia Derbey <Nadia.Derbey@bull.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
21a4826a7c
commit
016d7132f2
51
ipc/msg.c
51
ipc/msg.c
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@ -388,31 +388,14 @@ copy_msqid_to_user(void __user *buf, struct msqid64_ds *in, int version)
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}
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}
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}
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}
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struct msq_setbuf {
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unsigned long qbytes;
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uid_t uid;
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gid_t gid;
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mode_t mode;
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};
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static inline unsigned long
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static inline unsigned long
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copy_msqid_from_user(struct msq_setbuf *out, void __user *buf, int version)
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copy_msqid_from_user(struct msqid64_ds *out, void __user *buf, int version)
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{
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{
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switch(version) {
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switch(version) {
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case IPC_64:
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case IPC_64:
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{
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if (copy_from_user(out, buf, sizeof(*out)))
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struct msqid64_ds tbuf;
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if (copy_from_user(&tbuf, buf, sizeof(tbuf)))
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return -EFAULT;
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return -EFAULT;
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out->qbytes = tbuf.msg_qbytes;
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out->uid = tbuf.msg_perm.uid;
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out->gid = tbuf.msg_perm.gid;
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out->mode = tbuf.msg_perm.mode;
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return 0;
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return 0;
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}
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case IPC_OLD:
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case IPC_OLD:
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{
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{
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struct msqid_ds tbuf_old;
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struct msqid_ds tbuf_old;
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@ -420,14 +403,14 @@ copy_msqid_from_user(struct msq_setbuf *out, void __user *buf, int version)
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if (copy_from_user(&tbuf_old, buf, sizeof(tbuf_old)))
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if (copy_from_user(&tbuf_old, buf, sizeof(tbuf_old)))
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return -EFAULT;
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return -EFAULT;
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out->uid = tbuf_old.msg_perm.uid;
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out->msg_perm.uid = tbuf_old.msg_perm.uid;
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out->gid = tbuf_old.msg_perm.gid;
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out->msg_perm.gid = tbuf_old.msg_perm.gid;
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out->mode = tbuf_old.msg_perm.mode;
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out->msg_perm.mode = tbuf_old.msg_perm.mode;
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if (tbuf_old.msg_qbytes == 0)
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if (tbuf_old.msg_qbytes == 0)
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out->qbytes = tbuf_old.msg_lqbytes;
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out->msg_qbytes = tbuf_old.msg_lqbytes;
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else
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else
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out->qbytes = tbuf_old.msg_qbytes;
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out->msg_qbytes = tbuf_old.msg_qbytes;
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return 0;
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return 0;
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}
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}
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@ -445,12 +428,12 @@ static int msgctl_down(struct ipc_namespace *ns, int msqid, int cmd,
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struct msqid_ds __user *buf, int version)
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struct msqid_ds __user *buf, int version)
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{
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{
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struct kern_ipc_perm *ipcp;
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struct kern_ipc_perm *ipcp;
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struct msq_setbuf setbuf;
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struct msqid64_ds msqid64;
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struct msg_queue *msq;
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struct msg_queue *msq;
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int err;
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int err;
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if (cmd == IPC_SET) {
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if (cmd == IPC_SET) {
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if (copy_msqid_from_user(&setbuf, buf, version))
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if (copy_msqid_from_user(&msqid64, buf, version))
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return -EFAULT;
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return -EFAULT;
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}
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}
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@ -468,8 +451,10 @@ static int msgctl_down(struct ipc_namespace *ns, int msqid, int cmd,
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goto out_unlock;
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goto out_unlock;
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if (cmd == IPC_SET) {
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if (cmd == IPC_SET) {
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err = audit_ipc_set_perm(setbuf.qbytes, setbuf.uid, setbuf.gid,
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err = audit_ipc_set_perm(msqid64.msg_qbytes,
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setbuf.mode);
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msqid64.msg_perm.uid,
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msqid64.msg_perm.gid,
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msqid64.msg_perm.mode);
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if (err)
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if (err)
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goto out_unlock;
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goto out_unlock;
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}
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}
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@ -491,18 +476,18 @@ static int msgctl_down(struct ipc_namespace *ns, int msqid, int cmd,
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freeque(ns, ipcp);
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freeque(ns, ipcp);
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goto out_up;
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goto out_up;
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case IPC_SET:
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case IPC_SET:
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if (setbuf.qbytes > ns->msg_ctlmnb &&
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if (msqid64.msg_qbytes > ns->msg_ctlmnb &&
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!capable(CAP_SYS_RESOURCE)) {
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!capable(CAP_SYS_RESOURCE)) {
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err = -EPERM;
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err = -EPERM;
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goto out_unlock;
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goto out_unlock;
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}
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}
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msq->q_qbytes = setbuf.qbytes;
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msq->q_qbytes = msqid64.msg_qbytes;
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ipcp->uid = setbuf.uid;
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ipcp->uid = msqid64.msg_perm.uid;
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ipcp->gid = setbuf.gid;
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ipcp->gid = msqid64.msg_perm.gid;
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ipcp->mode = (ipcp->mode & ~S_IRWXUGO) |
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ipcp->mode = (ipcp->mode & ~S_IRWXUGO) |
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(S_IRWXUGO & setbuf.mode);
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(S_IRWXUGO & msqid64.msg_perm.mode);
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msq->q_ctime = get_seconds();
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msq->q_ctime = get_seconds();
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/* sleeping receivers might be excluded by
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/* sleeping receivers might be excluded by
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* stricter permissions.
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* stricter permissions.
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40
ipc/sem.c
40
ipc/sem.c
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@ -835,28 +835,14 @@ out_free:
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return err;
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return err;
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}
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}
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struct sem_setbuf {
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static inline unsigned long
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uid_t uid;
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copy_semid_from_user(struct semid64_ds *out, void __user *buf, int version)
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gid_t gid;
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mode_t mode;
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};
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static inline unsigned long copy_semid_from_user(struct sem_setbuf *out, void __user *buf, int version)
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{
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{
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switch(version) {
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switch(version) {
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case IPC_64:
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case IPC_64:
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{
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if (copy_from_user(out, buf, sizeof(*out)))
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struct semid64_ds tbuf;
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if(copy_from_user(&tbuf, buf, sizeof(tbuf)))
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return -EFAULT;
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return -EFAULT;
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out->uid = tbuf.sem_perm.uid;
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out->gid = tbuf.sem_perm.gid;
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out->mode = tbuf.sem_perm.mode;
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return 0;
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return 0;
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}
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case IPC_OLD:
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case IPC_OLD:
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{
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{
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struct semid_ds tbuf_old;
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struct semid_ds tbuf_old;
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@ -864,9 +850,9 @@ static inline unsigned long copy_semid_from_user(struct sem_setbuf *out, void __
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if(copy_from_user(&tbuf_old, buf, sizeof(tbuf_old)))
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if(copy_from_user(&tbuf_old, buf, sizeof(tbuf_old)))
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return -EFAULT;
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return -EFAULT;
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out->uid = tbuf_old.sem_perm.uid;
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out->sem_perm.uid = tbuf_old.sem_perm.uid;
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out->gid = tbuf_old.sem_perm.gid;
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out->sem_perm.gid = tbuf_old.sem_perm.gid;
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out->mode = tbuf_old.sem_perm.mode;
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out->sem_perm.mode = tbuf_old.sem_perm.mode;
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return 0;
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return 0;
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}
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}
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@ -885,11 +871,11 @@ static int semctl_down(struct ipc_namespace *ns, int semid,
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{
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{
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struct sem_array *sma;
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struct sem_array *sma;
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int err;
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int err;
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struct sem_setbuf uninitialized_var(setbuf);
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struct semid64_ds semid64;
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struct kern_ipc_perm *ipcp;
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struct kern_ipc_perm *ipcp;
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if(cmd == IPC_SET) {
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if(cmd == IPC_SET) {
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if(copy_semid_from_user (&setbuf, arg.buf, version))
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if (copy_semid_from_user(&semid64, arg.buf, version))
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return -EFAULT;
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return -EFAULT;
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}
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}
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down_write(&sem_ids(ns).rw_mutex);
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down_write(&sem_ids(ns).rw_mutex);
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@ -906,7 +892,9 @@ static int semctl_down(struct ipc_namespace *ns, int semid,
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goto out_unlock;
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goto out_unlock;
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if (cmd == IPC_SET) {
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if (cmd == IPC_SET) {
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err = audit_ipc_set_perm(0, setbuf.uid, setbuf.gid, setbuf.mode);
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err = audit_ipc_set_perm(0, semid64.sem_perm.uid,
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semid64.sem_perm.gid,
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semid64.sem_perm.mode);
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if (err)
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if (err)
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goto out_unlock;
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goto out_unlock;
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}
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}
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@ -925,10 +913,10 @@ static int semctl_down(struct ipc_namespace *ns, int semid,
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freeary(ns, ipcp);
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freeary(ns, ipcp);
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goto out_up;
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goto out_up;
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case IPC_SET:
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case IPC_SET:
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ipcp->uid = setbuf.uid;
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ipcp->uid = semid64.sem_perm.uid;
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ipcp->gid = setbuf.gid;
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ipcp->gid = semid64.sem_perm.gid;
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ipcp->mode = (ipcp->mode & ~S_IRWXUGO)
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ipcp->mode = (ipcp->mode & ~S_IRWXUGO)
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| (semid64.sem_perm.mode & S_IRWXUGO);
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sma->sem_ctime = get_seconds();
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sma->sem_ctime = get_seconds();
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break;
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break;
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default:
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default:
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41
ipc/shm.c
41
ipc/shm.c
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@ -511,28 +511,14 @@ static inline unsigned long copy_shmid_to_user(void __user *buf, struct shmid64_
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}
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}
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}
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}
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struct shm_setbuf {
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static inline unsigned long
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uid_t uid;
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copy_shmid_from_user(struct shmid64_ds *out, void __user *buf, int version)
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gid_t gid;
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mode_t mode;
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};
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static inline unsigned long copy_shmid_from_user(struct shm_setbuf *out, void __user *buf, int version)
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{
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{
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switch(version) {
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switch(version) {
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case IPC_64:
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case IPC_64:
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{
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if (copy_from_user(out, buf, sizeof(*out)))
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struct shmid64_ds tbuf;
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if (copy_from_user(&tbuf, buf, sizeof(tbuf)))
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return -EFAULT;
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return -EFAULT;
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out->uid = tbuf.shm_perm.uid;
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out->gid = tbuf.shm_perm.gid;
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out->mode = tbuf.shm_perm.mode;
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return 0;
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return 0;
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}
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case IPC_OLD:
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case IPC_OLD:
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{
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{
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struct shmid_ds tbuf_old;
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struct shmid_ds tbuf_old;
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@ -540,9 +526,9 @@ static inline unsigned long copy_shmid_from_user(struct shm_setbuf *out, void __
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if (copy_from_user(&tbuf_old, buf, sizeof(tbuf_old)))
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if (copy_from_user(&tbuf_old, buf, sizeof(tbuf_old)))
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return -EFAULT;
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return -EFAULT;
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out->uid = tbuf_old.shm_perm.uid;
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out->shm_perm.uid = tbuf_old.shm_perm.uid;
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out->gid = tbuf_old.shm_perm.gid;
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out->shm_perm.gid = tbuf_old.shm_perm.gid;
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out->mode = tbuf_old.shm_perm.mode;
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out->shm_perm.mode = tbuf_old.shm_perm.mode;
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return 0;
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return 0;
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}
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}
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@ -625,12 +611,12 @@ static int shmctl_down(struct ipc_namespace *ns, int shmid, int cmd,
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struct shmid_ds __user *buf, int version)
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struct shmid_ds __user *buf, int version)
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{
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{
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struct kern_ipc_perm *ipcp;
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struct kern_ipc_perm *ipcp;
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struct shm_setbuf setbuf;
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struct shmid64_ds shmid64;
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struct shmid_kernel *shp;
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struct shmid_kernel *shp;
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int err;
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int err;
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if (cmd == IPC_SET) {
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if (cmd == IPC_SET) {
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if (copy_shmid_from_user(&setbuf, buf, version))
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if (copy_shmid_from_user(&shmid64, buf, version))
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return -EFAULT;
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return -EFAULT;
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}
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}
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@ -648,8 +634,9 @@ static int shmctl_down(struct ipc_namespace *ns, int shmid, int cmd,
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goto out_unlock;
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goto out_unlock;
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if (cmd == IPC_SET) {
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if (cmd == IPC_SET) {
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err = audit_ipc_set_perm(0, setbuf.uid,
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err = audit_ipc_set_perm(0, shmid64.shm_perm.uid,
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setbuf.gid, setbuf.mode);
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shmid64.shm_perm.gid,
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shmid64.shm_perm.mode);
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if (err)
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if (err)
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goto out_unlock;
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goto out_unlock;
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}
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}
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@ -669,10 +656,10 @@ static int shmctl_down(struct ipc_namespace *ns, int shmid, int cmd,
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do_shm_rmid(ns, ipcp);
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do_shm_rmid(ns, ipcp);
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goto out_up;
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goto out_up;
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case IPC_SET:
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case IPC_SET:
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ipcp->uid = setbuf.uid;
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ipcp->uid = shmid64.shm_perm.uid;
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ipcp->gid = setbuf.gid;
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ipcp->gid = shmid64.shm_perm.gid;
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ipcp->mode = (ipcp->mode & ~S_IRWXUGO)
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ipcp->mode = (ipcp->mode & ~S_IRWXUGO)
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| (setbuf.mode & S_IRWXUGO);
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| (shmid64.shm_perm.mode & S_IRWXUGO);
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shp->shm_ctim = get_seconds();
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shp->shm_ctim = get_seconds();
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break;
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break;
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default:
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default:
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