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authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-02 20:25:04 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-02 20:25:04 -0700
commitaab174f0df5d72d31caccf281af5f614fa254578 (patch)
tree2a172c5009c4ac8755e858593154c258ce7709a0 /fs/ioctl.c
parentca41cc96b2813221b05af57d0355157924de5a07 (diff)
parent2bd2c1941f141ad780135ccc1cd08ca71a24f10a (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs update from Al Viro: - big one - consolidation of descriptor-related logics; almost all of that is moved to fs/file.c (BTW, I'm seriously tempted to rename the result to fd.c. As it is, we have a situation when file_table.c is about handling of struct file and file.c is about handling of descriptor tables; the reasons are historical - file_table.c used to be about a static array of struct file we used to have way back). A lot of stray ends got cleaned up and converted to saner primitives, disgusting mess in android/binder.c is still disgusting, but at least doesn't poke so much in descriptor table guts anymore. A bunch of relatively minor races got fixed in process, plus an ext4 struct file leak. - related thing - fget_light() partially unuglified; see fdget() in there (and yes, it generates the code as good as we used to have). - also related - bits of Cyrill's procfs stuff that got entangled into that work; _not_ all of it, just the initial move to fs/proc/fd.c and switch of fdinfo to seq_file. - Alex's fs/coredump.c spiltoff - the same story, had been easier to take that commit than mess with conflicts. The rest is a separate pile, this was just a mechanical code movement. - a few misc patches all over the place. Not all for this cycle, there'll be more (and quite a few currently sit in akpm's tree)." Fix up trivial conflicts in the android binder driver, and some fairly simple conflicts due to two different changes to the sock_alloc_file() interface ("take descriptor handling from sock_alloc_file() to callers" vs "net: Providing protocol type via system.sockprotoname xattr of /proc/PID/fd entries" adding a dentry name to the socket) * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (72 commits) MAX_LFS_FILESIZE should be a loff_t compat: fs: Generic compat_sys_sendfile implementation fs: push rcu_barrier() from deactivate_locked_super() to filesystems btrfs: reada_extent doesn't need kref for refcount coredump: move core dump functionality into its own file coredump: prevent double-free on an error path in core dumper usb/gadget: fix misannotations fcntl: fix misannotations ceph: don't abuse d_delete() on failure exits hypfs: ->d_parent is never NULL or negative vfs: delete surplus inode NULL check switch simple cases of fget_light to fdget new helpers: fdget()/fdput() switch o2hb_region_dev_write() to fget_light() proc_map_files_readdir(): don't bother with grabbing files make get_file() return its argument vhost_set_vring(): turn pollstart/pollstop into bool switch prctl_set_mm_exe_file() to fget_light() switch xfs_find_handle() to fget_light() switch xfs_swapext() to fget_light() ...
Diffstat (limited to 'fs/ioctl.c')
-rw-r--r--fs/ioctl.c25
1 files changed, 9 insertions, 16 deletions
diff --git a/fs/ioctl.c b/fs/ioctl.c
index 29167bebe874..3bdad6d1f268 100644
--- a/fs/ioctl.c
+++ b/fs/ioctl.c
@@ -603,21 +603,14 @@ int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd,
SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd, unsigned long, arg)
{
- struct file *filp;
- int error = -EBADF;
- int fput_needed;
-
- filp = fget_light(fd, &fput_needed);
- if (!filp)
- goto out;
-
- error = security_file_ioctl(filp, cmd, arg);
- if (error)
- goto out_fput;
-
- error = do_vfs_ioctl(filp, fd, cmd, arg);
- out_fput:
- fput_light(filp, fput_needed);
- out:
+ int error;
+ struct fd f = fdget(fd);
+
+ if (!f.file)
+ return -EBADF;
+ error = security_file_ioctl(f.file, cmd, arg);
+ if (!error)
+ error = do_vfs_ioctl(f.file, fd, cmd, arg);
+ fdput(f);
return error;
}