diff options
author | Al Viro <viro@zeniv.linux.org.uk> | 2013-03-20 15:42:10 +0100 |
---|---|---|
committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-04-09 20:12:56 +0200 |
commit | 72ec35163f9f728ba1579fd80682e51e933dfa8a (patch) | |
tree | be16e677a5009144cb52c602dcb7dfbc2f86b12a /fs/compat.c | |
parent | f2fs: use mnt_want_write_file() in ioctl (diff) | |
download | linux-72ec35163f9f728ba1579fd80682e51e933dfa8a.tar.xz linux-72ec35163f9f728ba1579fd80682e51e933dfa8a.zip |
switch compat readv/writev variants to COMPAT_SYSCALL_DEFINE
... and take to fs/read_write.c
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/compat.c')
-rw-r--r-- | fs/compat.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/fs/compat.c b/fs/compat.c index daa3b771d64d..5058345dc279 100644 --- a/fs/compat.c +++ b/fs/compat.c @@ -1069,192 +1069,6 @@ asmlinkage long compat_sys_getdents64(unsigned int fd, } #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */ -static ssize_t compat_do_readv_writev(int type, struct file *file, - const struct compat_iovec __user *uvector, - unsigned long nr_segs, loff_t *pos) -{ - compat_ssize_t tot_len; - struct iovec iovstack[UIO_FASTIOV]; - struct iovec *iov = iovstack; - ssize_t ret; - io_fn_t fn; - iov_fn_t fnv; - - ret = -EINVAL; - if (!file->f_op) - goto out; - - ret = compat_rw_copy_check_uvector(type, uvector, nr_segs, - UIO_FASTIOV, iovstack, &iov); - if (ret <= 0) - goto out; - - tot_len = ret; - ret = rw_verify_area(type, file, pos, tot_len); - if (ret < 0) - goto out; - - fnv = NULL; - if (type == READ) { - fn = file->f_op->read; - fnv = file->f_op->aio_read; - } else { - fn = (io_fn_t)file->f_op->write; - fnv = file->f_op->aio_write; - } - - if (fnv) { - file_start_write(file); - ret = do_sync_readv_writev(file, iov, nr_segs, tot_len, - pos, fnv); - file_end_write(file); - } else - ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn); - -out: - if (iov != iovstack) - kfree(iov); - if ((ret + (type == READ)) > 0) { - if (type == READ) - fsnotify_access(file); - else - fsnotify_modify(file); - } - return ret; -} - -static size_t compat_readv(struct file *file, - const struct compat_iovec __user *vec, - unsigned long vlen, loff_t *pos) -{ - ssize_t ret = -EBADF; - - if (!(file->f_mode & FMODE_READ)) - goto out; - - ret = -EINVAL; - if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read)) - goto out; - - ret = compat_do_readv_writev(READ, file, vec, vlen, pos); - -out: - if (ret > 0) - add_rchar(current, ret); - inc_syscr(current); - return ret; -} - -asmlinkage ssize_t -compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, - unsigned long vlen) -{ - struct fd f = fdget(fd); - ssize_t ret; - loff_t pos; - - if (!f.file) - return -EBADF; - pos = f.file->f_pos; - ret = compat_readv(f.file, vec, vlen, &pos); - f.file->f_pos = pos; - fdput(f); - return ret; -} - -asmlinkage ssize_t -compat_sys_preadv64(unsigned long fd, const struct compat_iovec __user *vec, - unsigned long vlen, loff_t pos) -{ - struct fd f; - ssize_t ret; - - if (pos < 0) - return -EINVAL; - f = fdget(fd); - if (!f.file) - return -EBADF; - ret = -ESPIPE; - if (f.file->f_mode & FMODE_PREAD) - ret = compat_readv(f.file, vec, vlen, &pos); - fdput(f); - return ret; -} - -asmlinkage ssize_t -compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec, - unsigned long vlen, u32 pos_low, u32 pos_high) -{ - loff_t pos = ((loff_t)pos_high << 32) | pos_low; - return compat_sys_preadv64(fd, vec, vlen, pos); -} - -static size_t compat_writev(struct file *file, - const struct compat_iovec __user *vec, - unsigned long vlen, loff_t *pos) -{ - ssize_t ret = -EBADF; - - if (!(file->f_mode & FMODE_WRITE)) - goto out; - - ret = -EINVAL; - if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write)) - goto out; - - ret = compat_do_readv_writev(WRITE, file, vec, vlen, pos); - -out: - if (ret > 0) - add_wchar(current, ret); - inc_syscw(current); - return ret; -} - -asmlinkage ssize_t -compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, - unsigned long vlen) -{ - struct fd f = fdget(fd); - ssize_t ret; - loff_t pos; - - if (!f.file) - return -EBADF; - pos = f.file->f_pos; - ret = compat_writev(f.file, vec, vlen, &pos); - f.file->f_pos = pos; - fdput(f); - return ret; -} - -asmlinkage ssize_t -compat_sys_pwritev64(unsigned long fd, const struct compat_iovec __user *vec, - unsigned long vlen, loff_t pos) -{ - struct fd f; - ssize_t ret; - - if (pos < 0) - return -EINVAL; - f = fdget(fd); - if (!f.file) - return -EBADF; - ret = -ESPIPE; - if (f.file->f_mode & FMODE_PWRITE) - ret = compat_writev(f.file, vec, vlen, &pos); - fdput(f); - return ret; -} - -asmlinkage ssize_t -compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec, - unsigned long vlen, u32 pos_low, u32 pos_high) -{ - loff_t pos = ((loff_t)pos_high << 32) | pos_low; - return compat_sys_pwritev64(fd, vec, vlen, pos); -} - asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32, unsigned int nr_segs, unsigned int flags) |