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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Browse source 
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()
  ...
This commit is contained in:
Linus Torvalds 2012-10-02 20:25:04 -07:00
commit aab174f0df
142 changed files with 2915 additions and 2877 deletions
Download patch file Download diff file Expand all files Collapse all files

10
drivers/infiniband/core/ucma.c
View file

@ -1183,7 +1183,7 @@ static ssize_t ucma_migrate_id(struct ucma_file *new_file,
struct rdma_ucm_migrate_id cmd;
struct rdma_ucm_migrate_resp resp;
struct ucma_context *ctx;
struct file *filp;
struct fd f;
struct ucma_file *cur_file;
int ret = 0;
@ -1191,12 +1191,12 @@ static ssize_t ucma_migrate_id(struct ucma_file *new_file,
return -EFAULT;
/* Get current fd to protect against it being closed */
filp = fget(cmd.fd);
if (!filp)
f = fdget(cmd.fd);
if (!f.file)
return -ENOENT;
/* Validate current fd and prevent destruction of id. */
ctx = ucma_get_ctx(filp->private_data, cmd.id);
ctx = ucma_get_ctx(f.file->private_data, cmd.id);
if (IS_ERR(ctx)) {
ret = PTR_ERR(ctx);
goto file_put;
@ -1230,7 +1230,7 @@ response:
ucma_put_ctx(ctx);
file_put:
fput(filp);
fdput(f);
return ret;
}

21
drivers/infiniband/core/uverbs_cmd.c
View file

@ -705,7 +705,7 @@ ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
struct ib_udata udata;
struct ib_uxrcd_object *obj;
struct ib_xrcd *xrcd = NULL;
struct file *f = NULL;
struct fd f = {NULL, 0};
struct inode *inode = NULL;
int ret = 0;
int new_xrcd = 0;
@ -724,18 +724,13 @@ ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
if (cmd.fd != -1) {
/* search for file descriptor */
f = fget(cmd.fd);
if (!f) {
ret = -EBADF;
goto err_tree_mutex_unlock;
}
inode = f->f_dentry->d_inode;
if (!inode) {
f = fdget(cmd.fd);
if (!f.file) {
ret = -EBADF;
goto err_tree_mutex_unlock;
}
inode = f.file->f_path.dentry->d_inode;
xrcd = find_xrcd(file->device, inode);
if (!xrcd && !(cmd.oflags & O_CREAT)) {
/* no file descriptor. Need CREATE flag */
@ -800,8 +795,8 @@ ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
goto err_copy;
}
if (f)
fput(f);
if (f.file)
fdput(f);
mutex_lock(&file->mutex);
list_add_tail(&obj->uobject.list, &file->ucontext->xrcd_list);
@ -830,8 +825,8 @@ err:
put_uobj_write(&obj->uobject);
err_tree_mutex_unlock:
if (f)
fput(f);
if (f.file)
fdput(f);
mutex_unlock(&file->device->xrcd_tree_mutex);

11
drivers/infiniband/core/uverbs_main.c
View file

@ -541,16 +541,15 @@ struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd)
{
struct ib_uverbs_event_file *ev_file = NULL;
struct file *filp;
struct fd f = fdget(fd);
filp = fget(fd);
if (!filp)
if (!f.file)
return NULL;
if (filp->f_op != &uverbs_event_fops)
if (f.file->f_op != &uverbs_event_fops)
goto out;
ev_file = filp->private_data;
ev_file = f.file->private_data;
if (ev_file->is_async) {
ev_file = NULL;
goto out;
@ -559,7 +558,7 @@ struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd)
kref_get(&ev_file->ref);
out:
fput(filp);
fdput(f);
return ev_file;
}