diff options
Diffstat (limited to 'fs/hugetlbfs/inode.c')
| -rw-r--r-- | fs/hugetlbfs/inode.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index cb88dac8cca..eba6d552d9c 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -31,12 +31,10 @@ #include <linux/statfs.h> #include <linux/security.h> #include <linux/ima.h> +#include <linux/magic.h> #include <asm/uaccess.h> -/* some random number */ -#define HUGETLBFS_MAGIC 0x958458f6 - static const struct super_operations hugetlbfs_ops; static const struct address_space_operations hugetlbfs_aops; const struct file_operations hugetlbfs_file_operations; @@ -44,6 +42,7 @@ static const struct inode_operations hugetlbfs_dir_inode_operations; static const struct inode_operations hugetlbfs_inode_operations; static struct backing_dev_info hugetlbfs_backing_dev_info = { + .name = "hugetlbfs", .ra_pages = 0, /* No readahead */ .capabilities = BDI_CAP_NO_ACCT_AND_WRITEBACK, }; @@ -506,6 +505,13 @@ static struct inode *hugetlbfs_get_inode(struct super_block *sb, uid_t uid, inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; INIT_LIST_HEAD(&inode->i_mapping->private_list); info = HUGETLBFS_I(inode); + /* + * The policy is initialized here even if we are creating a + * private inode because initialization simply creates an + * an empty rb tree and calls spin_lock_init(), later when we + * call mpol_free_shared_policy() it will just return because + * the rb tree will still be empty. + */ mpol_shared_policy_init(&info->policy, NULL); switch (mode & S_IFMT) { default: @@ -930,13 +936,19 @@ static struct file_system_type hugetlbfs_fs_type = { static struct vfsmount *hugetlbfs_vfsmount; -static int can_do_hugetlb_shm(void) +static int can_do_hugetlb_shm(int creat_flags) { - return capable(CAP_IPC_LOCK) || in_group_p(sysctl_hugetlb_shm_group); + if (creat_flags != HUGETLB_SHMFS_INODE) + return 0; + if (capable(CAP_IPC_LOCK)) + return 1; + if (in_group_p(sysctl_hugetlb_shm_group)) + return 1; + return 0; } struct file *hugetlb_file_setup(const char *name, size_t size, int acctflag, - struct user_struct **user) + struct user_struct **user, int creat_flags) { int error = -ENOMEM; struct file *file; @@ -948,7 +960,7 @@ struct file *hugetlb_file_setup(const char *name, size_t size, int acctflag, if (!hugetlbfs_vfsmount) return ERR_PTR(-ENOENT); - if (!can_do_hugetlb_shm()) { + if (!can_do_hugetlb_shm(creat_flags)) { *user = current_user(); if (user_shm_lock(size, *user)) { WARN_ONCE(1, |