diff options
Diffstat (limited to 'ipc')
| -rw-r--r-- | ipc/mqueue.c | 27 | ||||
| -rw-r--r-- | ipc/msgutil.c | 2 | ||||
| -rw-r--r-- | ipc/shm.c | 39 |
3 files changed, 33 insertions, 35 deletions
diff --git a/ipc/mqueue.c b/ipc/mqueue.c index 9b7c8ab7d75c..28bd64ddeda3 100644 --- a/ipc/mqueue.c +++ b/ipc/mqueue.c @@ -128,7 +128,6 @@ static struct inode *mqueue_get_inode(struct super_block *sb, if (S_ISREG(mode)) { struct mqueue_inode_info *info; - struct task_struct *p = current; unsigned long mq_bytes, mq_msg_tblsz; inode->i_fop = &mqueue_file_operations; @@ -159,7 +158,7 @@ static struct inode *mqueue_get_inode(struct super_block *sb, spin_lock(&mq_lock); if (u->mq_bytes + mq_bytes < u->mq_bytes || - u->mq_bytes + mq_bytes > task_rlimit(p, RLIMIT_MSGQUEUE)) { + u->mq_bytes + mq_bytes > rlimit(RLIMIT_MSGQUEUE)) { spin_unlock(&mq_lock); /* mqueue_evict_inode() releases info->messages */ ret = -EMFILE; @@ -189,30 +188,20 @@ static int mqueue_fill_super(struct super_block *sb, void *data, int silent) { struct inode *inode; struct ipc_namespace *ns = data; - int error; sb->s_blocksize = PAGE_CACHE_SIZE; sb->s_blocksize_bits = PAGE_CACHE_SHIFT; sb->s_magic = MQUEUE_MAGIC; sb->s_op = &mqueue_super_ops; - inode = mqueue_get_inode(sb, ns, S_IFDIR | S_ISVTX | S_IRWXUGO, - NULL); - if (IS_ERR(inode)) { - error = PTR_ERR(inode); - goto out; - } + inode = mqueue_get_inode(sb, ns, S_IFDIR | S_ISVTX | S_IRWXUGO, NULL); + if (IS_ERR(inode)) + return PTR_ERR(inode); - sb->s_root = d_alloc_root(inode); - if (!sb->s_root) { - iput(inode); - error = -ENOMEM; - goto out; - } - error = 0; - -out: - return error; + sb->s_root = d_make_root(inode); + if (!sb->s_root) + return -ENOMEM; + return 0; } static struct dentry *mqueue_mount(struct file_system_type *fs_type, diff --git a/ipc/msgutil.c b/ipc/msgutil.c index 5652101cdac0..26143d377c95 100644 --- a/ipc/msgutil.c +++ b/ipc/msgutil.c @@ -13,7 +13,9 @@ #include <linux/security.h> #include <linux/slab.h> #include <linux/ipc.h> +#include <linux/msg.h> #include <linux/ipc_namespace.h> +#include <linux/utsname.h> #include <asm/uaccess.h> #include "util.h" diff --git a/ipc/shm.c b/ipc/shm.c index 02ecf2c078fc..406c5b208193 100644 --- a/ipc/shm.c +++ b/ipc/shm.c @@ -482,7 +482,7 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params) /* hugetlb_file_setup applies strict accounting */ if (shmflg & SHM_NORESERVE) acctflag = VM_NORESERVE; - file = hugetlb_file_setup(name, size, acctflag, + file = hugetlb_file_setup(name, 0, size, acctflag, &shp->mlock_user, HUGETLB_SHMFS_INODE); } else { /* @@ -870,9 +870,7 @@ SYSCALL_DEFINE3(shmctl, int, shmid, int, cmd, struct shmid_ds __user *, buf) case SHM_LOCK: case SHM_UNLOCK: { - struct file *uninitialized_var(shm_file); - - lru_add_drain_all(); /* drain pagevecs to lru lists */ + struct file *shm_file; shp = shm_lock_check(ns, shmid); if (IS_ERR(shp)) { @@ -895,22 +893,31 @@ SYSCALL_DEFINE3(shmctl, int, shmid, int, cmd, struct shmid_ds __user *, buf) err = security_shm_shmctl(shp, cmd); if (err) goto out_unlock; - - if(cmd==SHM_LOCK) { + + shm_file = shp->shm_file; + if (is_file_hugepages(shm_file)) + goto out_unlock; + + if (cmd == SHM_LOCK) { struct user_struct *user = current_user(); - if (!is_file_hugepages(shp->shm_file)) { - err = shmem_lock(shp->shm_file, 1, user); - if (!err && !(shp->shm_perm.mode & SHM_LOCKED)){ - shp->shm_perm.mode |= SHM_LOCKED; - shp->mlock_user = user; - } + err = shmem_lock(shm_file, 1, user); + if (!err && !(shp->shm_perm.mode & 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_perm.mode &= ~SHM_LOCKED; - shp->mlock_user = NULL; + goto out_unlock; } + + /* SHM_UNLOCK */ + if (!(shp->shm_perm.mode & SHM_LOCKED)) + goto out_unlock; + shmem_lock(shm_file, 0, shp->mlock_user); + shp->shm_perm.mode &= ~SHM_LOCKED; + shp->mlock_user = NULL; + get_file(shm_file); shm_unlock(shp); + shmem_unlock_mapping(shm_file->f_mapping); + fput(shm_file); goto out; } case IPC_RMID: |