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path: root/fs/fcntl.c
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Diffstat (limited to 'fs/fcntl.c')
-rw-r--r--fs/fcntl.c47
1 files changed, 29 insertions, 18 deletions
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 6fbc9d8fcc36..bfecc6238083 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -24,20 +24,24 @@
void fastcall set_close_on_exec(unsigned int fd, int flag)
{
struct files_struct *files = current->files;
+ struct fdtable *fdt;
spin_lock(&files->file_lock);
+ fdt = files_fdtable(files);
if (flag)
- FD_SET(fd, files->close_on_exec);
+ FD_SET(fd, fdt->close_on_exec);
else
- FD_CLR(fd, files->close_on_exec);
+ FD_CLR(fd, fdt->close_on_exec);
spin_unlock(&files->file_lock);
}
static inline int get_close_on_exec(unsigned int fd)
{
struct files_struct *files = current->files;
+ struct fdtable *fdt;
int res;
spin_lock(&files->file_lock);
- res = FD_ISSET(fd, files->close_on_exec);
+ fdt = files_fdtable(files);
+ res = FD_ISSET(fd, fdt->close_on_exec);
spin_unlock(&files->file_lock);
return res;
}
@@ -54,24 +58,26 @@ static int locate_fd(struct files_struct *files,
unsigned int newfd;
unsigned int start;
int error;
+ struct fdtable *fdt;
error = -EINVAL;
if (orig_start >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
goto out;
+ fdt = files_fdtable(files);
repeat:
/*
* Someone might have closed fd's in the range
- * orig_start..files->next_fd
+ * orig_start..fdt->next_fd
*/
start = orig_start;
- if (start < files->next_fd)
- start = files->next_fd;
+ if (start < fdt->next_fd)
+ start = fdt->next_fd;
newfd = start;
- if (start < files->max_fdset) {
- newfd = find_next_zero_bit(files->open_fds->fds_bits,
- files->max_fdset, start);
+ if (start < fdt->max_fdset) {
+ newfd = find_next_zero_bit(fdt->open_fds->fds_bits,
+ fdt->max_fdset, start);
}
error = -EMFILE;
@@ -89,8 +95,8 @@ repeat:
if (error)
goto repeat;
- if (start <= files->next_fd)
- files->next_fd = newfd + 1;
+ if (start <= fdt->next_fd)
+ fdt->next_fd = newfd + 1;
error = newfd;
@@ -101,13 +107,16 @@ out:
static int dupfd(struct file *file, unsigned int start)
{
struct files_struct * files = current->files;
+ struct fdtable *fdt;
int fd;
spin_lock(&files->file_lock);
fd = locate_fd(files, file, start);
if (fd >= 0) {
- FD_SET(fd, files->open_fds);
- FD_CLR(fd, files->close_on_exec);
+ /* locate_fd() may have expanded fdtable, load the ptr */
+ fdt = files_fdtable(files);
+ FD_SET(fd, fdt->open_fds);
+ FD_CLR(fd, fdt->close_on_exec);
spin_unlock(&files->file_lock);
fd_install(fd, file);
} else {
@@ -123,6 +132,7 @@ asmlinkage long sys_dup2(unsigned int oldfd, unsigned int newfd)
int err = -EBADF;
struct file * file, *tofree;
struct files_struct * files = current->files;
+ struct fdtable *fdt;
spin_lock(&files->file_lock);
if (!(file = fcheck(oldfd)))
@@ -148,13 +158,14 @@ asmlinkage long sys_dup2(unsigned int oldfd, unsigned int newfd)
/* Yes. It's a race. In user space. Nothing sane to do */
err = -EBUSY;
- tofree = files->fd[newfd];
- if (!tofree && FD_ISSET(newfd, files->open_fds))
+ fdt = files_fdtable(files);
+ tofree = fdt->fd[newfd];
+ if (!tofree && FD_ISSET(newfd, fdt->open_fds))
goto out_fput;
- files->fd[newfd] = file;
- FD_SET(newfd, files->open_fds);
- FD_CLR(newfd, files->close_on_exec);
+ fdt->fd[newfd] = file;
+ FD_SET(newfd, fdt->open_fds);
+ FD_CLR(newfd, fdt->close_on_exec);
spin_unlock(&files->file_lock);
if (tofree)