#include <linux/fcntl.h>
#include <linux/namei.h>
#include <linux/file.h>
+#include <linux/fdtable.h>
#include <linux/vfs.h>
#include <linux/ioctl.h>
#include <linux/init.h>
return compat_sys_futimesat(AT_FDCWD, filename, t);
}
+static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf)
+{
+ compat_ino_t ino = stat->ino;
+ typeof(ubuf->st_uid) uid = 0;
+ typeof(ubuf->st_gid) gid = 0;
+ int err;
+
+ SET_UID(uid, stat->uid);
+ SET_GID(gid, stat->gid);
+
+ if ((u64) stat->size > MAX_NON_LFS ||
+ !old_valid_dev(stat->dev) ||
+ !old_valid_dev(stat->rdev))
+ return -EOVERFLOW;
+ if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
+ return -EOVERFLOW;
+
+ if (clear_user(ubuf, sizeof(*ubuf)))
+ return -EFAULT;
+
+ err = __put_user(old_encode_dev(stat->dev), &ubuf->st_dev);
+ err |= __put_user(ino, &ubuf->st_ino);
+ err |= __put_user(stat->mode, &ubuf->st_mode);
+ err |= __put_user(stat->nlink, &ubuf->st_nlink);
+ err |= __put_user(uid, &ubuf->st_uid);
+ err |= __put_user(gid, &ubuf->st_gid);
+ err |= __put_user(old_encode_dev(stat->rdev), &ubuf->st_rdev);
+ err |= __put_user(stat->size, &ubuf->st_size);
+ err |= __put_user(stat->atime.tv_sec, &ubuf->st_atime);
+ err |= __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec);
+ err |= __put_user(stat->mtime.tv_sec, &ubuf->st_mtime);
+ err |= __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec);
+ err |= __put_user(stat->ctime.tv_sec, &ubuf->st_ctime);
+ err |= __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec);
+ err |= __put_user(stat->blksize, &ubuf->st_blksize);
+ err |= __put_user(stat->blocks, &ubuf->st_blocks);
+ return err;
+}
+
asmlinkage long compat_sys_newstat(char __user * filename,
struct compat_stat __user *statbuf)
{
{
if (sizeof ubuf->f_blocks == 4) {
- if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
- 0xffffffff00000000ULL)
+ if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
+ kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
return -EOVERFLOW;
/* f_files and f_ffree may be -1; it's okay
* to stuff that into 32 bits */
* The following statfs calls are copies of code from fs/open.c and
* should be checked against those from time to time
*/
-asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
+asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf)
{
- struct nameidata nd;
+ struct path path;
int error;
- error = user_path_walk(path, &nd);
+ error = user_path(pathname, &path);
if (!error) {
struct kstatfs tmp;
- error = vfs_statfs(nd.dentry, &tmp);
+ error = vfs_statfs(path.dentry, &tmp);
if (!error)
error = put_compat_statfs(buf, &tmp);
- path_release(&nd);
+ path_put(&path);
}
return error;
}
static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
{
if (sizeof ubuf->f_blocks == 4) {
- if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
- 0xffffffff00000000ULL)
+ if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
+ kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
return -EOVERFLOW;
/* f_files and f_ffree may be -1; it's okay
* to stuff that into 32 bits */
return 0;
}
-asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
+asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf)
{
- struct nameidata nd;
+ struct path path;
int error;
if (sz != sizeof(*buf))
return -EINVAL;
- error = user_path_walk(path, &nd);
+ error = user_path(pathname, &path);
if (!error) {
struct kstatfs tmp;
- error = vfs_statfs(nd.dentry, &tmp);
+ error = vfs_statfs(path.dentry, &tmp);
if (!error)
error = put_compat_statfs64(buf, &tmp);
- path_release(&nd);
+ path_put(&path);
}
return error;
}
real->flags = raw->flags;
real->version = raw->version;
}
- else {
- return -EINVAL;
- }
return 0;
}
if (buf->result)
return -EINVAL;
d_ino = ino;
- if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
+ if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
+ buf->result = -EOVERFLOW;
return -EOVERFLOW;
+ }
buf->result++;
dirent = buf->dirent;
if (!access_ok(VERIFY_WRITE, dirent,
buf.dirent = dirent;
error = vfs_readdir(file, compat_fillonedir, &buf);
- if (error >= 0)
+ if (buf.result)
error = buf.result;
fput(file);
if (reclen > buf->count)
return -EINVAL;
d_ino = ino;
- if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
+ if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
+ buf->error = -EOVERFLOW;
return -EOVERFLOW;
+ }
dirent = buf->previous;
if (dirent) {
if (__put_user(offset, &dirent->d_off))
buf.error = 0;
error = vfs_readdir(file, compat_filldir, &buf);
- if (error < 0)
- goto out_putf;
- error = buf.error;
+ if (error >= 0)
+ error = buf.error;
lastdirent = buf.previous;
if (lastdirent) {
if (put_user(file->f_pos, &lastdirent->d_off))
else
error = count - buf.count;
}
-
-out_putf:
fput(file);
out:
return error;
buf.error = 0;
error = vfs_readdir(file, compat_filldir64, &buf);
- if (error < 0)
- goto out_putf;
- error = buf.error;
+ if (error >= 0)
+ error = buf.error;
lastdirent = buf.previous;
if (lastdirent) {
typeof(lastdirent->d_off) d_off = file->f_pos;
- error = -EFAULT;
if (__put_user_unaligned(d_off, &lastdirent->d_off))
- goto out_putf;
- error = count - buf.count;
+ error = -EFAULT;
+ else
+ error = count - buf.count;
}
-
-out_putf:
fput(file);
out:
return error;
if (ret < 0)
goto out;
- ret = security_file_permission(file, type == READ ? MAY_READ:MAY_WRITE);
- if (ret)
- goto out;
-
fnv = NULL;
if (type == READ) {
fn = file->f_op->read;
ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos);
out:
+ if (ret > 0)
+ add_rchar(current, ret);
+ inc_syscr(current);
fput(file);
return ret;
}
ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos);
out:
+ if (ret > 0)
+ add_wchar(current, ret);
+ inc_syscw(current);
fput(file);
return ret;
}
if (!p)
break;
argv++;
- if(++i > max)
+ if (i++ >= max)
return -E2BIG;
}
}
{
struct page *kmapped_page = NULL;
char *kaddr = NULL;
+ unsigned long kpos = 0;
int ret;
while (argc-- > 0) {
unsigned long pos;
if (get_user(str, argv+argc) ||
- !(len = strnlen_user(compat_ptr(str), bprm->p))) {
+ !(len = strnlen_user(compat_ptr(str), MAX_ARG_STRLEN))) {
ret = -EFAULT;
goto out;
}
- if (bprm->p < len) {
+ if (len > MAX_ARG_STRLEN) {
ret = -E2BIG;
goto out;
}
- bprm->p -= len;
- /* XXX: add architecture specific overflow check here. */
+ /* We're going to work our way backwords. */
pos = bprm->p;
+ str += len;
+ bprm->p -= len;
while (len > 0) {
- int i, new, err;
int offset, bytes_to_copy;
- struct page *page;
offset = pos % PAGE_SIZE;
- i = pos/PAGE_SIZE;
- page = bprm->page[i];
- new = 0;
- if (!page) {
- page = alloc_page(GFP_HIGHUSER);
- bprm->page[i] = page;
- if (!page) {
- ret = -ENOMEM;
+ if (offset == 0)
+ offset = PAGE_SIZE;
+
+ bytes_to_copy = offset;
+ if (bytes_to_copy > len)
+ bytes_to_copy = len;
+
+ offset -= bytes_to_copy;
+ pos -= bytes_to_copy;
+ str -= bytes_to_copy;
+ len -= bytes_to_copy;
+
+ if (!kmapped_page || kpos != (pos & PAGE_MASK)) {
+ struct page *page;
+
+#ifdef CONFIG_STACK_GROWSUP
+ ret = expand_stack_downwards(bprm->vma, pos);
+ if (ret < 0) {
+ /* We've exceed the stack rlimit. */
+ ret = -E2BIG;
+ goto out;
+ }
+#endif
+ ret = get_user_pages(current, bprm->mm, pos,
+ 1, 1, 1, &page, NULL);
+ if (ret <= 0) {
+ /* We've exceed the stack rlimit. */
+ ret = -E2BIG;
goto out;
}
- new = 1;
- }
- if (page != kmapped_page) {
- if (kmapped_page)
+ if (kmapped_page) {
+ flush_kernel_dcache_page(kmapped_page);
kunmap(kmapped_page);
+ put_page(kmapped_page);
+ }
kmapped_page = page;
kaddr = kmap(kmapped_page);
+ kpos = pos & PAGE_MASK;
+ flush_cache_page(bprm->vma, kpos,
+ page_to_pfn(kmapped_page));
}
- if (new && offset)
- memset(kaddr, 0, offset);
- bytes_to_copy = PAGE_SIZE - offset;
- if (bytes_to_copy > len) {
- bytes_to_copy = len;
- if (new)
- memset(kaddr+offset+len, 0,
- PAGE_SIZE-offset-len);
- }
- err = copy_from_user(kaddr+offset, compat_ptr(str),
- bytes_to_copy);
- if (err) {
+ if (copy_from_user(kaddr+offset, compat_ptr(str),
+ bytes_to_copy)) {
ret = -EFAULT;
goto out;
}
-
- pos += bytes_to_copy;
- str += bytes_to_copy;
- len -= bytes_to_copy;
}
}
ret = 0;
out:
- if (kmapped_page)
+ if (kmapped_page) {
+ flush_kernel_dcache_page(kmapped_page);
kunmap(kmapped_page);
- return ret;
-}
-
-#ifdef CONFIG_MMU
-
-#define free_arg_pages(bprm) do { } while (0)
-
-#else
-
-static inline void free_arg_pages(struct linux_binprm *bprm)
-{
- int i;
-
- for (i = 0; i < MAX_ARG_PAGES; i++) {
- if (bprm->page[i])
- __free_page(bprm->page[i]);
- bprm->page[i] = NULL;
+ put_page(kmapped_page);
}
+ return ret;
}
-#endif /* CONFIG_MMU */
-
/*
* compat_do_execve() is mostly a copy of do_execve(), with the exception
* that it processes 32 bit argv and envp pointers.
struct linux_binprm *bprm;
struct file *file;
int retval;
- int i;
retval = -ENOMEM;
bprm = kzalloc(sizeof(*bprm), GFP_KERNEL);
if (!bprm)
goto out_ret;
+ retval = mutex_lock_interruptible(¤t->cred_exec_mutex);
+ if (retval < 0)
+ goto out_free;
+
+ retval = -ENOMEM;
+ bprm->cred = prepare_exec_creds();
+ if (!bprm->cred)
+ goto out_unlock;
+ check_unsafe_exec(bprm, current->files);
+
file = open_exec(filename);
retval = PTR_ERR(file);
if (IS_ERR(file))
- goto out_kfree;
+ goto out_unlock;
sched_exec();
- bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
bprm->file = file;
bprm->filename = filename;
bprm->interp = filename;
- bprm->mm = mm_alloc();
- retval = -ENOMEM;
- if (!bprm->mm)
- goto out_file;
- retval = init_new_context(current, bprm->mm);
- if (retval < 0)
- goto out_mm;
+ retval = bprm_mm_init(bprm);
+ if (retval)
+ goto out_file;
- bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t));
+ bprm->argc = compat_count(argv, MAX_ARG_STRINGS);
if ((retval = bprm->argc) < 0)
- goto out_mm;
+ goto out;
- bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t));
+ bprm->envc = compat_count(envp, MAX_ARG_STRINGS);
if ((retval = bprm->envc) < 0)
- goto out_mm;
-
- retval = security_bprm_alloc(bprm);
- if (retval)
goto out;
retval = prepare_binprm(bprm);
goto out;
retval = search_binary_handler(bprm, regs);
- if (retval >= 0) {
- free_arg_pages(bprm);
-
- /* execve success */
- security_bprm_free(bprm);
- acct_update_integrals(current);
- kfree(bprm);
- return retval;
- }
-
-out:
- /* Something went wrong, return the inode and free the argument pages*/
- for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
- struct page * page = bprm->page[i];
- if (page)
- __free_page(page);
- }
+ if (retval < 0)
+ goto out;
- if (bprm->security)
- security_bprm_free(bprm);
+ /* execve succeeded */
+ mutex_unlock(¤t->cred_exec_mutex);
+ acct_update_integrals(current);
+ free_bprm(bprm);
+ return retval;
-out_mm:
+out:
if (bprm->mm)
- mmdrop(bprm->mm);
+ mmput(bprm->mm);
out_file:
if (bprm->file) {
fput(bprm->file);
}
-out_kfree:
- kfree(bprm);
+out_unlock:
+ mutex_unlock(¤t->cred_exec_mutex);
+
+out_free:
+ free_bprm(bprm);
out_ret:
return retval;
#define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
+static int poll_select_copy_remaining(struct timespec *end_time, void __user *p,
+ int timeval, int ret)
+{
+ struct timespec ts;
+
+ if (!p)
+ return ret;
+
+ if (current->personality & STICKY_TIMEOUTS)
+ goto sticky;
+
+ /* No update for zero timeout */
+ if (!end_time->tv_sec && !end_time->tv_nsec)
+ return ret;
+
+ ktime_get_ts(&ts);
+ ts = timespec_sub(*end_time, ts);
+ if (ts.tv_sec < 0)
+ ts.tv_sec = ts.tv_nsec = 0;
+
+ if (timeval) {
+ struct compat_timeval rtv;
+
+ rtv.tv_sec = ts.tv_sec;
+ rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
+
+ if (!copy_to_user(p, &rtv, sizeof(rtv)))
+ return ret;
+ } else {
+ struct compat_timespec rts;
+
+ rts.tv_sec = ts.tv_sec;
+ rts.tv_nsec = ts.tv_nsec;
+
+ if (!copy_to_user(p, &rts, sizeof(rts)))
+ return ret;
+ }
+ /*
+ * If an application puts its timeval in read-only memory, we
+ * don't want the Linux-specific update to the timeval to
+ * cause a fault after the select has completed
+ * successfully. However, because we're not updating the
+ * timeval, we can't restart the system call.
+ */
+
+sticky:
+ if (ret == -ERESTARTNOHAND)
+ ret = -EINTR;
+ return ret;
+}
+
/*
* Ooo, nasty. We need here to frob 32-bit unsigned longs to
* 64-bit unsigned longs.
((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
int compat_core_sys_select(int n, compat_ulong_t __user *inp,
- compat_ulong_t __user *outp, compat_ulong_t __user *exp, s64 *timeout)
+ compat_ulong_t __user *outp, compat_ulong_t __user *exp,
+ struct timespec *end_time)
{
fd_set_bits fds;
- char *bits;
+ void *bits;
int size, max_fds, ret = -EINVAL;
struct fdtable *fdt;
+ long stack_fds[SELECT_STACK_ALLOC/sizeof(long)];
if (n < 0)
goto out_nofds;
* since we used fdset we need to allocate memory in units of
* long-words.
*/
- ret = -ENOMEM;
size = FDS_BYTES(n);
- bits = kmalloc(6 * size, GFP_KERNEL);
- if (!bits)
- goto out_nofds;
+ bits = stack_fds;
+ if (size > sizeof(stack_fds) / 6) {
+ bits = kmalloc(6 * size, GFP_KERNEL);
+ ret = -ENOMEM;
+ if (!bits)
+ goto out_nofds;
+ }
fds.in = (unsigned long *) bits;
fds.out = (unsigned long *) (bits + size);
fds.ex = (unsigned long *) (bits + 2*size);
zero_fd_set(n, fds.res_out);
zero_fd_set(n, fds.res_ex);
- ret = do_select(n, &fds, timeout);
+ ret = do_select(n, &fds, end_time);
if (ret < 0)
goto out;
compat_set_fd_set(n, exp, fds.res_ex))
ret = -EFAULT;
out:
- kfree(bits);
+ if (bits != stack_fds)
+ kfree(bits);
out_nofds:
return ret;
}
compat_ulong_t __user *outp, compat_ulong_t __user *exp,
struct compat_timeval __user *tvp)
{
- s64 timeout = -1;
+ struct timespec end_time, *to = NULL;
struct compat_timeval tv;
int ret;
if (copy_from_user(&tv, tvp, sizeof(tv)))
return -EFAULT;
- if (tv.tv_sec < 0 || tv.tv_usec < 0)
+ to = &end_time;
+ if (poll_select_set_timeout(to,
+ tv.tv_sec + (tv.tv_usec / USEC_PER_SEC),
+ (tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC))
return -EINVAL;
-
- /* Cast to u64 to make GCC stop complaining */
- if ((u64)tv.tv_sec >= (u64)MAX_INT64_SECONDS)
- timeout = -1; /* infinite */
- else {
- timeout = DIV_ROUND_UP(tv.tv_usec, 1000000/HZ);
- timeout += tv.tv_sec * HZ;
- }
}
- ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
-
- if (tvp) {
- struct compat_timeval rtv;
-
- if (current->personality & STICKY_TIMEOUTS)
- goto sticky;
- rtv.tv_usec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ));
- rtv.tv_sec = timeout;
- if (compat_timeval_compare(&rtv, &tv) >= 0)
- rtv = tv;
- if (copy_to_user(tvp, &rtv, sizeof(rtv))) {
-sticky:
- /*
- * If an application puts its timeval in read-only
- * memory, we don't want the Linux-specific update to
- * the timeval to cause a fault after the select has
- * completed successfully. However, because we're not
- * updating the timeval, we can't restart the system
- * call.
- */
- if (ret == -ERESTARTNOHAND)
- ret = -EINTR;
- }
- }
+ ret = compat_core_sys_select(n, inp, outp, exp, to);
+ ret = poll_select_copy_remaining(&end_time, tvp, 1, ret);
return ret;
}
-#ifdef TIF_RESTORE_SIGMASK
-asmlinkage long compat_sys_pselect7(int n, compat_ulong_t __user *inp,
+#ifdef HAVE_SET_RESTORE_SIGMASK
+static long do_compat_pselect(int n, compat_ulong_t __user *inp,
compat_ulong_t __user *outp, compat_ulong_t __user *exp,
struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
compat_size_t sigsetsize)
{
compat_sigset_t ss32;
sigset_t ksigmask, sigsaved;
- s64 timeout = MAX_SCHEDULE_TIMEOUT;
struct compat_timespec ts;
+ struct timespec end_time, *to = NULL;
int ret;
if (tsp) {
if (copy_from_user(&ts, tsp, sizeof(ts)))
return -EFAULT;
- if (ts.tv_sec < 0 || ts.tv_nsec < 0)
+ to = &end_time;
+ if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
return -EINVAL;
}
sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
}
- do {
- if (tsp) {
- if ((unsigned long)ts.tv_sec < MAX_SELECT_SECONDS) {
- timeout = DIV_ROUND_UP(ts.tv_nsec, 1000000000/HZ);
- timeout += ts.tv_sec * (unsigned long)HZ;
- ts.tv_sec = 0;
- ts.tv_nsec = 0;
- } else {
- ts.tv_sec -= MAX_SELECT_SECONDS;
- timeout = MAX_SELECT_SECONDS * HZ;
- }
- }
-
- ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
-
- } while (!ret && !timeout && tsp && (ts.tv_sec || ts.tv_nsec));
-
- if (tsp) {
- struct compat_timespec rts;
-
- if (current->personality & STICKY_TIMEOUTS)
- goto sticky;
-
- rts.tv_sec = timeout / HZ;
- rts.tv_nsec = (timeout % HZ) * (NSEC_PER_SEC/HZ);
- if (rts.tv_nsec >= NSEC_PER_SEC) {
- rts.tv_sec++;
- rts.tv_nsec -= NSEC_PER_SEC;
- }
- if (compat_timespec_compare(&rts, &ts) >= 0)
- rts = ts;
- if (copy_to_user(tsp, &rts, sizeof(rts))) {
-sticky:
- /*
- * If an application puts its timeval in read-only
- * memory, we don't want the Linux-specific update to
- * the timeval to cause a fault after the select has
- * completed successfully. However, because we're not
- * updating the timeval, we can't restart the system
- * call.
- */
- if (ret == -ERESTARTNOHAND)
- ret = -EINTR;
- }
- }
+ ret = compat_core_sys_select(n, inp, outp, exp, to);
+ ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
if (ret == -ERESTARTNOHAND) {
/*
if (sigmask) {
memcpy(¤t->saved_sigmask, &sigsaved,
sizeof(sigsaved));
- set_thread_flag(TIF_RESTORE_SIGMASK);
+ set_restore_sigmask();
}
} else if (sigmask)
sigprocmask(SIG_SETMASK, &sigsaved, NULL);
(compat_size_t __user *)(sig+sizeof(up))))
return -EFAULT;
}
- return compat_sys_pselect7(n, inp, outp, exp, tsp, compat_ptr(up),
- sigsetsize);
+ return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up),
+ sigsetsize);
}
asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
compat_sigset_t ss32;
sigset_t ksigmask, sigsaved;
struct compat_timespec ts;
- s64 timeout = -1;
+ struct timespec end_time, *to = NULL;
int ret;
if (tsp) {
if (copy_from_user(&ts, tsp, sizeof(ts)))
return -EFAULT;
- /* We assume that ts.tv_sec is always lower than
- the number of seconds that can be expressed in
- an s64. Otherwise the compiler bitches at us */
- timeout = DIV_ROUND_UP(ts.tv_nsec, 1000000000/HZ);
- timeout += ts.tv_sec * HZ;
+ to = &end_time;
+ if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
+ return -EINVAL;
}
if (sigmask) {
sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
}
- ret = do_sys_poll(ufds, nfds, &timeout);
+ ret = do_sys_poll(ufds, nfds, to);
/* We can restart this syscall, usually */
if (ret == -EINTR) {
if (sigmask) {
memcpy(¤t->saved_sigmask, &sigsaved,
sizeof(sigsaved));
- set_thread_flag(TIF_RESTORE_SIGMASK);
+ set_restore_sigmask();
}
ret = -ERESTARTNOHAND;
} else if (sigmask)
sigprocmask(SIG_SETMASK, &sigsaved, NULL);
- if (tsp && timeout >= 0) {
- struct compat_timespec rts;
-
- if (current->personality & STICKY_TIMEOUTS)
- goto sticky;
- /* Yes, we know it's actually an s64, but it's also positive. */
- rts.tv_nsec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)) *
- 1000;
- rts.tv_sec = timeout;
- if (compat_timespec_compare(&rts, &ts) >= 0)
- rts = ts;
- if (copy_to_user(tsp, &rts, sizeof(rts))) {
-sticky:
- /*
- * If an application puts its timeval in read-only
- * memory, we don't want the Linux-specific update to
- * the timeval to cause a fault after the select has
- * completed successfully. However, because we're not
- * updating the timeval, we can't restart the system
- * call.
- */
- if (ret == -ERESTARTNOHAND && timeout >= 0)
- ret = -EINTR;
- }
- }
+ ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
return ret;
}
-#endif /* TIF_RESTORE_SIGMASK */
+#endif /* HAVE_SET_RESTORE_SIGMASK */
#if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
/* Stuff for NFS server syscalls... */
#ifdef CONFIG_EPOLL
-#ifdef CONFIG_HAS_COMPAT_EPOLL_EVENT
-asmlinkage long compat_sys_epoll_ctl(int epfd, int op, int fd,
- struct compat_epoll_event __user *event)
-{
- long err = 0;
- struct compat_epoll_event user;
- struct epoll_event __user *kernel = NULL;
-
- if (event) {
- if (copy_from_user(&user, event, sizeof(user)))
- return -EFAULT;
- kernel = compat_alloc_user_space(sizeof(struct epoll_event));
- err |= __put_user(user.events, &kernel->events);
- err |= __put_user(user.data, &kernel->data);
- }
-
- return err ? err : sys_epoll_ctl(epfd, op, fd, kernel);
-}
-
-
-asmlinkage long compat_sys_epoll_wait(int epfd,
- struct compat_epoll_event __user *events,
- int maxevents, int timeout)
-{
- long i, ret, err = 0;
- struct epoll_event __user *kbuf;
- struct epoll_event ev;
-
- if ((maxevents <= 0) ||
- (maxevents > (INT_MAX / sizeof(struct epoll_event))))
- return -EINVAL;
- kbuf = compat_alloc_user_space(sizeof(struct epoll_event) * maxevents);
- ret = sys_epoll_wait(epfd, kbuf, maxevents, timeout);
- for (i = 0; i < ret; i++) {
- err |= __get_user(ev.events, &kbuf[i].events);
- err |= __get_user(ev.data, &kbuf[i].data);
- err |= __put_user(ev.events, &events->events);
- err |= __put_user_unaligned(ev.data, &events->data);
- events++;
- }
-
- return err ? -EFAULT: ret;
-}
-#endif /* CONFIG_HAS_COMPAT_EPOLL_EVENT */
-
-#ifdef TIF_RESTORE_SIGMASK
+#ifdef HAVE_SET_RESTORE_SIGMASK
asmlinkage long compat_sys_epoll_pwait(int epfd,
struct compat_epoll_event __user *events,
int maxevents, int timeout,
sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
}
-#ifdef CONFIG_HAS_COMPAT_EPOLL_EVENT
- err = compat_sys_epoll_wait(epfd, events, maxevents, timeout);
-#else
err = sys_epoll_wait(epfd, events, maxevents, timeout);
-#endif
/*
* If we changed the signal mask, we need to restore the original one.
if (err == -EINTR) {
memcpy(¤t->saved_sigmask, &sigsaved,
sizeof(sigsaved));
- set_thread_flag(TIF_RESTORE_SIGMASK);
+ set_restore_sigmask();
} else
sigprocmask(SIG_SETMASK, &sigsaved, NULL);
}
return err;
}
-#endif /* TIF_RESTORE_SIGMASK */
+#endif /* HAVE_SET_RESTORE_SIGMASK */
#endif /* CONFIG_EPOLL */
#ifdef CONFIG_SIGNALFD
-asmlinkage long compat_sys_signalfd(int ufd,
- const compat_sigset_t __user *sigmask,
- compat_size_t sigsetsize)
+asmlinkage long compat_sys_signalfd4(int ufd,
+ const compat_sigset_t __user *sigmask,
+ compat_size_t sigsetsize, int flags)
{
compat_sigset_t ss32;
sigset_t tmp;
if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t)))
return -EFAULT;
- return sys_signalfd(ufd, ksigmask, sizeof(sigset_t));
+ return sys_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags);
}
+asmlinkage long compat_sys_signalfd(int ufd,
+ const compat_sigset_t __user *sigmask,
+ compat_size_t sigsetsize)
+{
+ return compat_sys_signalfd4(ufd, sigmask, sigsetsize, 0);
+}
#endif /* CONFIG_SIGNALFD */
#ifdef CONFIG_TIMERFD
-asmlinkage long compat_sys_timerfd(int ufd, int clockid, int flags,
- const struct compat_itimerspec __user *utmr)
+asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
+ const struct compat_itimerspec __user *utmr,
+ struct compat_itimerspec __user *otmr)
{
- long res;
+ int error;
struct itimerspec t;
struct itimerspec __user *ut;
- res = -EFAULT;
if (get_compat_itimerspec(&t, utmr))
- goto err_exit;
- ut = compat_alloc_user_space(sizeof(*ut));
- if (copy_to_user(ut, &t, sizeof(t)) )
- goto err_exit;
+ return -EFAULT;
+ ut = compat_alloc_user_space(2 * sizeof(struct itimerspec));
+ if (copy_to_user(&ut[0], &t, sizeof(t)))
+ return -EFAULT;
+ error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]);
+ if (!error && otmr)
+ error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) ||
+ put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
- res = sys_timerfd(ufd, clockid, flags, ut);
-err_exit:
- return res;
+ return error;
}
-#endif /* CONFIG_TIMERFD */
+asmlinkage long compat_sys_timerfd_gettime(int ufd,
+ struct compat_itimerspec __user *otmr)
+{
+ int error;
+ struct itimerspec t;
+ struct itimerspec __user *ut;
+
+ ut = compat_alloc_user_space(sizeof(struct itimerspec));
+ error = sys_timerfd_gettime(ufd, ut);
+ if (!error)
+ error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) ||
+ put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
+ return error;
+}
+
+#endif /* CONFIG_TIMERFD */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff