eCryptfs: Regression in unencrypted filename symlinks

[safe/jmp/linux-2.6] / fs / fcntl.c

diff --git a/fs/fcntl.c b/fs/fcntl.c
index 87c39f1..bd215cc 100644 (file)
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -19,6 +19,7 @@
 #include <linux/signal.h>
 #include <linux/rcupdate.h>
 #include <linux/pid_namespace.h>
+#include <linux/smp_lock.h>
 
 #include <asm/poll.h>
 #include <asm/siginfo.h>
@@ -49,7 +50,7 @@ static int get_close_on_exec(unsigned int fd)
        return res;
 }
 
-asmlinkage long sys_dup3(unsigned int oldfd, unsigned int newfd, int flags)
+SYSCALL_DEFINE3(dup3, unsigned int, oldfd, unsigned int, newfd, int, flags)
 {
        int err = -EBADF;
        struct file * file, *tofree;
@@ -112,7 +113,7 @@ out_unlock:
        return err;
 }
 
-asmlinkage long sys_dup2(unsigned int oldfd, unsigned int newfd)
+SYSCALL_DEFINE2(dup2, unsigned int, oldfd, unsigned int, newfd)
 {
        if (unlikely(newfd == oldfd)) { /* corner case */
                struct files_struct *files = current->files;
@@ -125,7 +126,7 @@ asmlinkage long sys_dup2(unsigned int oldfd, unsigned int newfd)
        return sys_dup3(oldfd, newfd, 0);
 }
 
-asmlinkage long sys_dup(unsigned int fildes)
+SYSCALL_DEFINE1(dup, unsigned int, fildes)
 {
        int ret = -EBADF;
        struct file *file = fget(fildes);
@@ -175,6 +176,11 @@ static int setfl(int fd, struct file * filp, unsigned long arg)
        if (error)
                return error;
 
+       /*
+        * We still need a lock here for now to keep multiple FASYNC calls
+        * from racing with each other.
+        */
+       lock_kernel();
        if ((arg ^ filp->f_flags) & FASYNC) {
                if (filp->f_op && filp->f_op->fasync) {
                        error = filp->f_op->fasync(fd, filp, (arg & FASYNC) != 0);
@@ -185,6 +191,7 @@ static int setfl(int fd, struct file * filp, unsigned long arg)
 
        filp->f_flags = (arg & SETFL_MASK) | (filp->f_flags & ~SETFL_MASK);
  out:
+       unlock_kernel();
        return error;
 }
 
@@ -328,7 +335,7 @@ static long do_fcntl(int fd, unsigned int cmd, unsigned long arg,
        return err;
 }
 
-asmlinkage long sys_fcntl(unsigned int fd, unsigned int cmd, unsigned long arg)
+SYSCALL_DEFINE3(fcntl, unsigned int, fd, unsigned int, cmd, unsigned long, arg)
 {      
        struct file *filp;
        long err = -EBADF;
@@ -351,7 +358,8 @@ out:
 }
 
 #if BITS_PER_LONG == 32
-asmlinkage long sys_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg)
+SYSCALL_DEFINE3(fcntl64, unsigned int, fd, unsigned int, cmd,
+               unsigned long, arg)
 {      
        struct file * filp;
        long err;