A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-29 11:11:45 -04:00
Code Issues Projects Releases Packages Wiki Activity

IPC: consolidate all xxxctl_down() functions

Browse source 
semctl_down(), msgctl_down() and shmctl_down() are used to handle the same set
of commands for each kind of IPC.  They all start to do the same job (they
retrieve the ipc and do some permission checks) before handling the commands
on their own.

This patch proposes to consolidate this by moving these same pieces of code
into one common function called ipcctl_pre_down().

It simplifies a little these xxxctl_down() functions and increases a little
the maintainability.

Signed-off-by: Pierre Peiffer <[email protected]>
Acked-by: Serge Hallyn <[email protected]>
Cc: Nadia Derbey <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Pierre Peiffer 2008-04-29 01:00:54 -07:00 • committed by Linus Torvalds
commit a5f75e7f25
5 changed files with 66 additions and 119 deletions
Download patch file Download diff file Expand all files Collapse all files

42
ipc/shm.c
View file

@ -126,18 +126,6 @@ static inline struct shmid_kernel *shm_lock_down(struct ipc_namespace *ns,
return container_of(ipcp, struct shmid_kernel, shm_perm);
}
static inline struct shmid_kernel *shm_lock_check_down(
struct ipc_namespace *ns,
int id)
{
struct kern_ipc_perm *ipcp = ipc_lock_check_down(&shm_ids(ns), id);
if (IS_ERR(ipcp))
return (struct shmid_kernel *)ipcp;
return container_of(ipcp, struct shmid_kernel, shm_perm);
}
/*
* shm_lock_(check_) routines are called in the paths where the rw_mutex
* is not held.
@ -620,33 +608,11 @@ static int shmctl_down(struct ipc_namespace *ns, int shmid, int cmd,
return -EFAULT;
}
down_write(&shm_ids(ns).rw_mutex);
shp = shm_lock_check_down(ns, shmid);
if (IS_ERR(shp)) {
err = PTR_ERR(shp);
goto out_up;
}
ipcp = ipcctl_pre_down(&shm_ids(ns), shmid, cmd, &shmid64.shm_perm, 0);
if (IS_ERR(ipcp))
return PTR_ERR(ipcp);
ipcp = &shp->shm_perm;
err = audit_ipc_obj(ipcp);
if (err)
goto out_unlock;
if (cmd == IPC_SET) {
err = audit_ipc_set_perm(0, shmid64.shm_perm.uid,
shmid64.shm_perm.gid,
shmid64.shm_perm.mode);
if (err)
goto out_unlock;
}
if (current->euid != ipcp->uid &&
current->euid != ipcp->cuid &&
!capable(CAP_SYS_ADMIN)) {
err = -EPERM;
goto out_unlock;
}
shp = container_of(ipcp, struct shmid_kernel, shm_perm);
err = security_shm_shmctl(shp, cmd);
if (err)