diff options
| -rw-r--r-- | fs/xattr.c | 116 |
1 files changed, 39 insertions, 77 deletions
diff --git a/fs/xattr.c b/fs/xattr.c index c69e6d43a0d2..64e83efb742d 100644 --- a/fs/xattr.c +++ b/fs/xattr.c @@ -364,13 +364,12 @@ out: return error; } -SYSCALL_DEFINE5(setxattr, const char __user *, pathname, - const char __user *, name, const void __user *, value, - size_t, size, int, flags) +static int path_setxattr(const char __user *pathname, + const char __user *name, const void __user *value, + size_t size, int flags, unsigned int lookup_flags) { struct path path; int error; - unsigned int lookup_flags = LOOKUP_FOLLOW; retry: error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path); if (error) @@ -388,28 +387,18 @@ retry: return error; } +SYSCALL_DEFINE5(setxattr, const char __user *, pathname, + const char __user *, name, const void __user *, value, + size_t, size, int, flags) +{ + return path_setxattr(pathname, name, value, size, flags, LOOKUP_FOLLOW); +} + SYSCALL_DEFINE5(lsetxattr, const char __user *, pathname, const char __user *, name, const void __user *, value, size_t, size, int, flags) { - struct path path; - int error; - unsigned int lookup_flags = 0; -retry: - error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path); - if (error) - return error; - error = mnt_want_write(path.mnt); - if (!error) { - error = setxattr(path.dentry, name, value, size, flags); - mnt_drop_write(path.mnt); - } - path_put(&path); - if (retry_estale(error, lookup_flags)) { - lookup_flags |= LOOKUP_REVAL; - goto retry; - } - return error; + return path_setxattr(pathname, name, value, size, flags, 0); } SYSCALL_DEFINE5(fsetxattr, int, fd, const char __user *, name, @@ -481,12 +470,12 @@ getxattr(struct dentry *d, const char __user *name, void __user *value, return error; } -SYSCALL_DEFINE4(getxattr, const char __user *, pathname, - const char __user *, name, void __user *, value, size_t, size) +static ssize_t path_getxattr(const char __user *pathname, + const char __user *name, void __user *value, + size_t size, unsigned int lookup_flags) { struct path path; ssize_t error; - unsigned int lookup_flags = LOOKUP_FOLLOW; retry: error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path); if (error) @@ -500,23 +489,16 @@ retry: return error; } +SYSCALL_DEFINE4(getxattr, const char __user *, pathname, + const char __user *, name, void __user *, value, size_t, size) +{ + return path_getxattr(pathname, name, value, size, LOOKUP_FOLLOW); +} + SYSCALL_DEFINE4(lgetxattr, const char __user *, pathname, const char __user *, name, void __user *, value, size_t, size) { - struct path path; - ssize_t error; - unsigned int lookup_flags = 0; -retry: - error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path); - if (error) - return error; - error = getxattr(path.dentry, name, value, size); - path_put(&path); - if (retry_estale(error, lookup_flags)) { - lookup_flags |= LOOKUP_REVAL; - goto retry; - } - return error; + return path_getxattr(pathname, name, value, size, 0); } SYSCALL_DEFINE4(fgetxattr, int, fd, const char __user *, name, @@ -571,12 +553,11 @@ listxattr(struct dentry *d, char __user *list, size_t size) return error; } -SYSCALL_DEFINE3(listxattr, const char __user *, pathname, char __user *, list, - size_t, size) +static ssize_t path_listxattr(const char __user *pathname, char __user *list, + size_t size, unsigned int lookup_flags) { struct path path; ssize_t error; - unsigned int lookup_flags = LOOKUP_FOLLOW; retry: error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path); if (error) @@ -590,23 +571,16 @@ retry: return error; } +SYSCALL_DEFINE3(listxattr, const char __user *, pathname, char __user *, list, + size_t, size) +{ + return path_listxattr(pathname, list, size, LOOKUP_FOLLOW); +} + SYSCALL_DEFINE3(llistxattr, const char __user *, pathname, char __user *, list, size_t, size) { - struct path path; - ssize_t error; - unsigned int lookup_flags = 0; -retry: - error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path); - if (error) - return error; - error = listxattr(path.dentry, list, size); - path_put(&path); - if (retry_estale(error, lookup_flags)) { - lookup_flags |= LOOKUP_REVAL; - goto retry; - } - return error; + return path_listxattr(pathname, list, size, 0); } SYSCALL_DEFINE3(flistxattr, int, fd, char __user *, list, size_t, size) @@ -640,12 +614,11 @@ removexattr(struct dentry *d, const char __user *name) return vfs_removexattr(d, kname); } -SYSCALL_DEFINE2(removexattr, const char __user *, pathname, - const char __user *, name) +static int path_removexattr(const char __user *pathname, + const char __user *name, unsigned int lookup_flags) { struct path path; int error; - unsigned int lookup_flags = LOOKUP_FOLLOW; retry: error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path); if (error) @@ -663,27 +636,16 @@ retry: return error; } +SYSCALL_DEFINE2(removexattr, const char __user *, pathname, + const char __user *, name) +{ + return path_removexattr(pathname, name, LOOKUP_FOLLOW); +} + SYSCALL_DEFINE2(lremovexattr, const char __user *, pathname, const char __user *, name) { - struct path path; - int error; - unsigned int lookup_flags = 0; -retry: - error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path); - if (error) - return error; - error = mnt_want_write(path.mnt); - if (!error) { - error = removexattr(path.dentry, name); - mnt_drop_write(path.mnt); - } - path_put(&path); - if (retry_estale(error, lookup_flags)) { - lookup_flags |= LOOKUP_REVAL; - goto retry; - } - return error; + return path_removexattr(pathname, name, 0); } SYSCALL_DEFINE2(fremovexattr, int, fd, const char __user *, name) |