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authorLinus Torvalds <torvalds@linux-foundation.org>2012-07-23 12:27:27 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-23 12:27:27 -0700
commita66d2c8f7ec1284206ca7c14569e2a607583f1e3 (patch)
tree08cf68bcef3559b370843cab8191e5cc0f740bde /arch/powerpc
parenta6be1fcbc57f95bb47ef3c8e4ee3d83731b8f21e (diff)
parent8cae6f7158ec1fa44c8a04a43db7d8020ec60437 (diff)
Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull the big VFS changes from Al Viro: "This one is *big* and changes quite a few things around VFS. What's in there: - the first of two really major architecture changes - death to open intents. The former is finally there; it was very long in making, but with Miklos getting through really hard and messy final push in fs/namei.c, we finally have it. Unlike his variant, this one doesn't introduce struct opendata; what we have instead is ->atomic_open() taking preallocated struct file * and passing everything via its fields. Instead of returning struct file *, it returns -E... on error, 0 on success and 1 in "deal with it yourself" case (e.g. symlink found on server, etc.). See comments before fs/namei.c:atomic_open(). That made a lot of goodies finally possible and quite a few are in that pile: ->lookup(), ->d_revalidate() and ->create() do not get struct nameidata * anymore; ->lookup() and ->d_revalidate() get lookup flags instead, ->create() gets "do we want it exclusive" flag. With the introduction of new helper (kern_path_locked()) we are rid of all struct nameidata instances outside of fs/namei.c; it's still visible in namei.h, but not for long. Come the next cycle, declaration will move either to fs/internal.h or to fs/namei.c itself. [me, miklos, hch] - The second major change: behaviour of final fput(). Now we have __fput() done without any locks held by caller *and* not from deep in call stack. That obviously lifts a lot of constraints on the locking in there. Moreover, it's legal now to call fput() from atomic contexts (which has immediately simplified life for aio.c). We also don't need anti-recursion logics in __scm_destroy() anymore. There is a price, though - the damn thing has become partially asynchronous. For fput() from normal process we are guaranteed that pending __fput() will be done before the caller returns to userland, exits or gets stopped for ptrace. For kernel threads and atomic contexts it's done via schedule_work(), so theoretically we might need a way to make sure it's finished; so far only one such place had been found, but there might be more. There's flush_delayed_fput() (do all pending __fput()) and there's __fput_sync() (fput() analog doing __fput() immediately). I hope we won't need them often; see warnings in fs/file_table.c for details. [me, based on task_work series from Oleg merged last cycle] - sync series from Jan - large part of "death to sync_supers()" work from Artem; the only bits missing here are exofs and ext4 ones. As far as I understand, those are going via the exofs and ext4 trees resp.; once they are in, we can put ->write_super() to the rest, along with the thread calling it. - preparatory bits from unionmount series (from dhowells). - assorted cleanups and fixes all over the place, as usual. This is not the last pile for this cycle; there's at least jlayton's ESTALE work and fsfreeze series (the latter - in dire need of fixes, so I'm not sure it'll make the cut this cycle). I'll probably throw symlink/hardlink restrictions stuff from Kees into the next pile, too. Plus there's a lot of misc patches I hadn't thrown into that one - it's large enough as it is..." * 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (127 commits) ext4: switch EXT4_IOC_RESIZE_FS to mnt_want_write_file() btrfs: switch btrfs_ioctl_balance() to mnt_want_write_file() switch dentry_open() to struct path, make it grab references itself spufs: shift dget/mntget towards dentry_open() zoran: don't bother with struct file * in zoran_map ecryptfs: don't reinvent the wheels, please - use struct completion don't expose I_NEW inodes via dentry->d_inode tidy up namei.c a bit unobfuscate follow_up() a bit ext3: pass custom EOF to generic_file_llseek_size() ext4: use core vfs llseek code for dir seeks vfs: allow custom EOF in generic_file_llseek code vfs: Avoid unnecessary WB_SYNC_NONE writeback during sys_sync and reorder sync passes vfs: Remove unnecessary flushing of block devices vfs: Make sys_sync writeout also block device inodes vfs: Create function for iterating over block devices vfs: Reorder operations during sys_sync quota: Move quota syncing to ->sync_fs method quota: Split dquot_quota_sync() to writeback and cache flushing part vfs: Move noop_backing_dev_info check from sync into writeback ...
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/platforms/cell/spufs/inode.c48
1 files changed, 18 insertions, 30 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index 66519d263da7..d544d7816df3 100644
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -317,28 +317,23 @@ out:
return ret;
}
-static int spufs_context_open(struct dentry *dentry, struct vfsmount *mnt)
+static int spufs_context_open(struct path *path)
{
int ret;
struct file *filp;
ret = get_unused_fd();
- if (ret < 0) {
- dput(dentry);
- mntput(mnt);
- goto out;
- }
+ if (ret < 0)
+ return ret;
- filp = dentry_open(dentry, mnt, O_RDONLY, current_cred());
+ filp = dentry_open(path, O_RDONLY, current_cred());
if (IS_ERR(filp)) {
put_unused_fd(ret);
- ret = PTR_ERR(filp);
- goto out;
+ return PTR_ERR(filp);
}
filp->f_op = &spufs_context_fops;
fd_install(ret, filp);
-out:
return ret;
}
@@ -453,6 +448,7 @@ spufs_create_context(struct inode *inode, struct dentry *dentry,
int affinity;
struct spu_gang *gang;
struct spu_context *neighbor;
+ struct path path = {.mnt = mnt, .dentry = dentry};
ret = -EPERM;
if ((flags & SPU_CREATE_NOSCHED) &&
@@ -495,11 +491,7 @@ spufs_create_context(struct inode *inode, struct dentry *dentry,
put_spu_context(neighbor);
}
- /*
- * get references for dget and mntget, will be released
- * in error path of *_open().
- */
- ret = spufs_context_open(dget(dentry), mntget(mnt));
+ ret = spufs_context_open(&path);
if (ret < 0) {
WARN_ON(spufs_rmdir(inode, dentry));
if (affinity)
@@ -556,28 +548,27 @@ out:
return ret;
}
-static int spufs_gang_open(struct dentry *dentry, struct vfsmount *mnt)
+static int spufs_gang_open(struct path *path)
{
int ret;
struct file *filp;
ret = get_unused_fd();
- if (ret < 0) {
- dput(dentry);
- mntput(mnt);
- goto out;
- }
+ if (ret < 0)
+ return ret;
- filp = dentry_open(dentry, mnt, O_RDONLY, current_cred());
+ /*
+ * get references for dget and mntget, will be released
+ * in error path of *_open().
+ */
+ filp = dentry_open(path, O_RDONLY, current_cred());
if (IS_ERR(filp)) {
put_unused_fd(ret);
- ret = PTR_ERR(filp);
- goto out;
+ return PTR_ERR(filp);
}
filp->f_op = &simple_dir_operations;
fd_install(ret, filp);
-out:
return ret;
}
@@ -585,17 +576,14 @@ static int spufs_create_gang(struct inode *inode,
struct dentry *dentry,
struct vfsmount *mnt, umode_t mode)
{
+ struct path path = {.mnt = mnt, .dentry = dentry};
int ret;
ret = spufs_mkgang(inode, dentry, mode & S_IRWXUGO);
if (ret)
goto out;
- /*
- * get references for dget and mntget, will be released
- * in error path of *_open().
- */
- ret = spufs_gang_open(dget(dentry), mntget(mnt));
+ ret = spufs_gang_open(&path);
if (ret < 0) {
int err = simple_rmdir(inode, dentry);
WARN_ON(err);