diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/audit.h | 11 | ||||
| -rw-r--r-- | include/linux/fs.h | 41 |
2 files changed, 28 insertions, 24 deletions
diff --git a/include/linux/audit.h b/include/linux/audit.h index 04d16895c56a..a5be09c8497a 100644 --- a/include/linux/audit.h +++ b/include/linux/audit.h @@ -318,7 +318,6 @@ extern void __audit_uring_exit(int success, long code); extern void __audit_syscall_entry(int major, unsigned long a0, unsigned long a1, unsigned long a2, unsigned long a3); extern void __audit_syscall_exit(int ret_success, long ret_value); -extern struct filename *__audit_reusename(const __user char *uptr); extern void __audit_getname(struct filename *name); extern void __audit_inode(struct filename *name, const struct dentry *dentry, unsigned int flags); @@ -382,12 +381,6 @@ static inline void audit_syscall_exit(void *pt_regs) __audit_syscall_exit(success, return_code); } } -static inline struct filename *audit_reusename(const __user char *name) -{ - if (unlikely(!audit_dummy_context())) - return __audit_reusename(name); - return NULL; -} static inline void audit_getname(struct filename *name) { if (unlikely(!audit_dummy_context())) @@ -626,10 +619,6 @@ static inline struct audit_context *audit_context(void) { return NULL; } -static inline struct filename *audit_reusename(const __user char *name) -{ - return NULL; -} static inline void audit_getname(struct filename *name) { } static inline void audit_inode(struct filename *name, diff --git a/include/linux/fs.h b/include/linux/fs.h index 73911f961c7e..2e4d1e8b0e71 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2418,14 +2418,19 @@ extern struct kobject *fs_kobj; /* fs/open.c */ struct audit_names; -struct filename { + +struct __filename_head { const char *name; /* pointer to actual string */ - const __user char *uptr; /* original userland pointer */ - atomic_t refcnt; + int refcnt; struct audit_names *aname; - const char iname[]; +}; +#define EMBEDDED_NAME_MAX (192 - sizeof(struct __filename_head)) +struct filename { + struct __filename_head; + const char iname[EMBEDDED_NAME_MAX]; }; static_assert(offsetof(struct filename, iname) % sizeof(long) == 0); +static_assert(sizeof(struct filename) % 64 == 0); static inline struct mnt_idmap *file_mnt_idmap(const struct file *file) { @@ -2520,11 +2525,23 @@ static inline struct filename *getname_maybe_null(const char __user *name, int f extern void putname(struct filename *name); DEFINE_FREE(putname, struct filename *, if (!IS_ERR_OR_NULL(_T)) putname(_T)) -static inline struct filename *refname(struct filename *name) -{ - atomic_inc(&name->refcnt); - return name; -} +struct delayed_filename { + struct filename *__incomplete_filename; // don't touch +}; +#define INIT_DELAYED_FILENAME(ptr) \ + ((void)(*(ptr) = (struct delayed_filename){})) +int delayed_getname(struct delayed_filename *, const char __user *); +int delayed_getname_uflags(struct delayed_filename *v, const char __user *, int); +void dismiss_delayed_filename(struct delayed_filename *); +int putname_to_delayed(struct delayed_filename *, struct filename *); +struct filename *complete_getname(struct delayed_filename *); + +DEFINE_CLASS(filename, struct filename *, putname(_T), getname(p), const char __user *p) +EXTEND_CLASS(filename, _kernel, getname_kernel(p), const char *p) +EXTEND_CLASS(filename, _flags, getname_flags(p, f), const char __user *p, unsigned int f) +EXTEND_CLASS(filename, _uflags, getname_uflags(p, f), const char __user *p, unsigned int f) +EXTEND_CLASS(filename, _maybe_null, getname_maybe_null(p, f), const char __user *p, unsigned int f) +EXTEND_CLASS(filename, _complete_delayed, complete_getname(p), struct delayed_filename *p) extern int finish_open(struct file *file, struct dentry *dentry, int (*open)(struct inode *, struct file *)); @@ -2543,10 +2560,8 @@ static inline int finish_open_simple(struct file *file, int error) extern void __init vfs_caches_init_early(void); extern void __init vfs_caches_init(void); -extern struct kmem_cache *names_cachep; - -#define __getname() kmem_cache_alloc(names_cachep, GFP_KERNEL) -#define __putname(name) kmem_cache_free(names_cachep, (void *)(name)) +#define __getname() kmalloc(PATH_MAX, GFP_KERNEL) +#define __putname(name) kfree(name) void emergency_thaw_all(void); extern int sync_filesystem(struct super_block *); |