diff options
Diffstat (limited to 'ipc/shm.c')
-rw-r--r-- | ipc/shm.c | 41 |
1 files changed, 24 insertions, 17 deletions
diff --git a/ipc/shm.c b/ipc/shm.c index 587d836d80d..4c28d2d8e30 100644 --- a/ipc/shm.c +++ b/ipc/shm.c @@ -27,6 +27,7 @@ #include <linux/security.h> #include <linux/syscalls.h> #include <linux/audit.h> +#include <linux/capability.h> #include <linux/ptrace.h> #include <linux/seq_file.h> @@ -34,8 +35,6 @@ #include "util.h" -#define shm_flags shm_perm.mode - static struct file_operations shm_file_operations; static struct vm_operations_struct shm_vm_ops; @@ -148,7 +147,7 @@ static void shm_close (struct vm_area_struct *shmd) shp->shm_dtim = get_seconds(); shp->shm_nattch--; if(shp->shm_nattch == 0 && - shp->shm_flags & SHM_DEST) + shp->shm_perm.mode & SHM_DEST) shm_destroy (shp); else shm_unlock(shp); @@ -157,14 +156,22 @@ static void shm_close (struct vm_area_struct *shmd) static int shm_mmap(struct file * file, struct vm_area_struct * vma) { - file_accessed(file); - vma->vm_ops = &shm_vm_ops; - shm_inc(file->f_dentry->d_inode->i_ino); - return 0; + int ret; + + ret = shmem_mmap(file, vma); + if (ret == 0) { + vma->vm_ops = &shm_vm_ops; + shm_inc(file->f_dentry->d_inode->i_ino); + } + + return ret; } static struct file_operations shm_file_operations = { - .mmap = shm_mmap + .mmap = shm_mmap, +#ifndef CONFIG_MMU + .get_unmapped_area = shmem_get_unmapped_area, +#endif }; static struct vm_operations_struct shm_vm_ops = { @@ -197,7 +204,7 @@ static int newseg (key_t key, int shmflg, size_t size) return -ENOMEM; shp->shm_perm.key = key; - shp->shm_flags = (shmflg & S_IRWXUGO); + shp->shm_perm.mode = (shmflg & S_IRWXUGO); shp->mlock_user = NULL; shp->shm_perm.security = NULL; @@ -337,7 +344,7 @@ static inline unsigned long copy_shmid_from_user(struct shm_setbuf *out, void __ out->uid = tbuf.shm_perm.uid; out->gid = tbuf.shm_perm.gid; - out->mode = tbuf.shm_flags; + out->mode = tbuf.shm_perm.mode; return 0; } @@ -350,7 +357,7 @@ static inline unsigned long copy_shmid_from_user(struct shm_setbuf *out, void __ out->uid = tbuf_old.shm_perm.uid; out->gid = tbuf_old.shm_perm.gid; - out->mode = tbuf_old.shm_flags; + out->mode = tbuf_old.shm_perm.mode; return 0; } @@ -552,13 +559,13 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf) if (!is_file_hugepages(shp->shm_file)) { err = shmem_lock(shp->shm_file, 1, user); if (!err) { - shp->shm_flags |= SHM_LOCKED; + shp->shm_perm.mode |= SHM_LOCKED; shp->mlock_user = user; } } } else if (!is_file_hugepages(shp->shm_file)) { shmem_lock(shp->shm_file, 0, shp->mlock_user); - shp->shm_flags &= ~SHM_LOCKED; + shp->shm_perm.mode &= ~SHM_LOCKED; shp->mlock_user = NULL; } shm_unlock(shp); @@ -597,7 +604,7 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf) goto out_unlock_up; if (shp->shm_nattch){ - shp->shm_flags |= SHM_DEST; + shp->shm_perm.mode |= SHM_DEST; /* Do not find it any more */ shp->shm_perm.key = IPC_PRIVATE; shm_unlock(shp); @@ -636,7 +643,7 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf) shp->shm_perm.uid = setbuf.uid; shp->shm_perm.gid = setbuf.gid; - shp->shm_flags = (shp->shm_flags & ~S_IRWXUGO) + shp->shm_perm.mode = (shp->shm_perm.mode & ~S_IRWXUGO) | (setbuf.mode & S_IRWXUGO); shp->shm_ctim = get_seconds(); break; @@ -769,7 +776,7 @@ invalid: BUG(); shp->shm_nattch--; if(shp->shm_nattch == 0 && - shp->shm_flags & SHM_DEST) + shp->shm_perm.mode & SHM_DEST) shm_destroy (shp); else shm_unlock(shp); @@ -894,7 +901,7 @@ static int sysvipc_shm_proc_show(struct seq_file *s, void *it) return seq_printf(s, format, shp->shm_perm.key, shp->id, - shp->shm_flags, + shp->shm_perm.mode, shp->shm_segsz, shp->shm_cprid, shp->shm_lprid, |