diff options
Diffstat (limited to 'mm/shmem.c')
| -rw-r--r-- | mm/shmem.c | 84 |
1 files changed, 47 insertions, 37 deletions
diff --git a/mm/shmem.c b/mm/shmem.c index 356dd99566ec..eef4ebea5158 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -29,7 +29,6 @@ #include <linux/mm.h> #include <linux/module.h> #include <linux/swap.h> -#include <linux/ima.h> static struct vfsmount *shm_mnt; @@ -42,6 +41,7 @@ static struct vfsmount *shm_mnt; #include <linux/xattr.h> #include <linux/exportfs.h> +#include <linux/posix_acl.h> #include <linux/generic_acl.h> #include <linux/mman.h> #include <linux/string.h> @@ -810,7 +810,7 @@ static int shmem_notify_change(struct dentry *dentry, struct iattr *attr) error = inode_setattr(inode, attr); #ifdef CONFIG_TMPFS_POSIX_ACL if (!error && (attr->ia_valid & ATTR_MODE)) - error = generic_acl_chmod(inode, &shmem_acl_ops); + error = generic_acl_chmod(inode); #endif if (page) page_cache_release(page); @@ -1017,7 +1017,14 @@ int shmem_unuse(swp_entry_t entry, struct page *page) goto out; } mutex_unlock(&shmem_swaplist_mutex); -out: return found; /* 0 or 1 or -ENOMEM */ + /* + * Can some race bring us here? We've been holding page lock, + * so I think not; but would rather try again later than BUG() + */ + unlock_page(page); + page_cache_release(page); +out: + return (found < 0) ? found : 0; } /* @@ -1080,7 +1087,7 @@ static int shmem_writepage(struct page *page, struct writeback_control *wbc) else inode = NULL; spin_unlock(&info->lock); - swap_duplicate(swap); + swap_shmem_alloc(swap); BUG_ON(page_mapped(page)); page_cache_release(page); /* pagecache ref */ swap_writepage(page, wbc); @@ -1817,11 +1824,15 @@ shmem_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev) return error; } } - error = shmem_acl_init(inode, dir); +#ifdef CONFIG_TMPFS_POSIX_ACL + error = generic_acl_init(inode, dir); if (error) { iput(inode); return error; } +#else + error = 0; +#endif if (dir->i_mode & S_ISGID) { inode->i_gid = dir->i_gid; if (S_ISDIR(mode)) @@ -2036,27 +2047,28 @@ static const struct inode_operations shmem_symlink_inode_operations = { * filesystem level, though. */ -static size_t shmem_xattr_security_list(struct inode *inode, char *list, +static size_t shmem_xattr_security_list(struct dentry *dentry, char *list, size_t list_len, const char *name, - size_t name_len) + size_t name_len, int handler_flags) { - return security_inode_listsecurity(inode, list, list_len); + return security_inode_listsecurity(dentry->d_inode, list, list_len); } -static int shmem_xattr_security_get(struct inode *inode, const char *name, - void *buffer, size_t size) +static int shmem_xattr_security_get(struct dentry *dentry, const char *name, + void *buffer, size_t size, int handler_flags) { if (strcmp(name, "") == 0) return -EINVAL; - return xattr_getsecurity(inode, name, buffer, size); + return xattr_getsecurity(dentry->d_inode, name, buffer, size); } -static int shmem_xattr_security_set(struct inode *inode, const char *name, - const void *value, size_t size, int flags) +static int shmem_xattr_security_set(struct dentry *dentry, const char *name, + const void *value, size_t size, int flags, int handler_flags) { if (strcmp(name, "") == 0) return -EINVAL; - return security_inode_setsecurity(inode, name, value, size, flags); + return security_inode_setsecurity(dentry->d_inode, name, value, + size, flags); } static struct xattr_handler shmem_xattr_security_handler = { @@ -2067,8 +2079,8 @@ static struct xattr_handler shmem_xattr_security_handler = { }; static struct xattr_handler *shmem_xattr_handlers[] = { - &shmem_xattr_acl_access_handler, - &shmem_xattr_acl_default_handler, + &generic_acl_access_handler, + &generic_acl_default_handler, &shmem_xattr_security_handler, NULL }; @@ -2447,7 +2459,7 @@ static const struct inode_operations shmem_inode_operations = { .getxattr = generic_getxattr, .listxattr = generic_listxattr, .removexattr = generic_removexattr, - .check_acl = shmem_check_acl, + .check_acl = generic_check_acl, #endif }; @@ -2470,7 +2482,7 @@ static const struct inode_operations shmem_dir_inode_operations = { .getxattr = generic_getxattr, .listxattr = generic_listxattr, .removexattr = generic_removexattr, - .check_acl = shmem_check_acl, + .check_acl = generic_check_acl, #endif }; @@ -2481,7 +2493,7 @@ static const struct inode_operations shmem_special_inode_operations = { .getxattr = generic_getxattr, .listxattr = generic_listxattr, .removexattr = generic_removexattr, - .check_acl = shmem_check_acl, + .check_acl = generic_check_acl, #endif }; @@ -2619,7 +2631,8 @@ struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags int error; struct file *file; struct inode *inode; - struct dentry *dentry, *root; + struct path path; + struct dentry *root; struct qstr this; if (IS_ERR(shm_mnt)) @@ -2636,38 +2649,35 @@ struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags this.len = strlen(name); this.hash = 0; /* will go */ root = shm_mnt->mnt_root; - dentry = d_alloc(root, &this); - if (!dentry) + path.dentry = d_alloc(root, &this); + if (!path.dentry) goto put_memory; - - error = -ENFILE; - file = get_empty_filp(); - if (!file) - goto put_dentry; + path.mnt = mntget(shm_mnt); error = -ENOSPC; inode = shmem_get_inode(root->d_sb, S_IFREG | S_IRWXUGO, 0, flags); if (!inode) - goto close_file; + goto put_dentry; - d_instantiate(dentry, inode); + d_instantiate(path.dentry, inode); inode->i_size = size; inode->i_nlink = 0; /* It is unlinked */ - init_file(file, shm_mnt, dentry, FMODE_WRITE | FMODE_READ, - &shmem_file_operations); - #ifndef CONFIG_MMU error = ramfs_nommu_expand_for_mapping(inode, size); if (error) - goto close_file; + goto put_dentry; #endif - ima_counts_get(file); + + error = -ENFILE; + file = alloc_file(&path, FMODE_WRITE | FMODE_READ, + &shmem_file_operations); + if (!file) + goto put_dentry; + return file; -close_file: - put_filp(file); put_dentry: - dput(dentry); + path_put(&path); put_memory: shmem_unacct_size(flags, size); return ERR_PTR(error); |