[GIT,PULL] Ceph updates for -rc1

Commit Message

Linus Torvalds Jan. 28, 2014, 9:48 p.m. UTC

On Tue, Jan 28, 2014 at 1:10 PM, Dave Jones <[e-mail]> wrote:
>
> This breaks the build for me.

It is my merge (Christoph's ACL changes came in today through the VFS
tree from Al).

I was doing the merges today on my laptop (I had jury duty yesterday
and today), and so I didn't do the allmodconfig build I would normally
do on my (much faster) desktop. Well, actually I did do the full fs
builds for the earlier pulls that actually had some conflicts, but not
for the ceph pull. The conflict was hidden by the fact that the whole
cifs ACL support is new, so there was no data conflict, just a silent
semantic conflict between the new smarter ACL helpers and the new ACL
use in CIFS.

I'm back home now (yay, all the afternoon cases got settled), and I
see the problem now. I should have done an allmodconfig build
immediately after coming home, but I never even thought of it.

Anyway, here's an *untested* conversion to the new posix acl helper
infrastructure. I do wonder if ceph_init_acl() could be converted to
posix_acl_create(), right now that part is a "non-conversion" - it's
just made to use __posix_acl_create() that implements the old
interface.

Al, Christoph, can you please check my conversion for sanity from a
generic posix-acl standpoint?

Sage, Guangliang, Li, can you check the actual cifs usage/sanity of
the attached patch?

Sorry about the messed-up merge. Although I also blame Al, because
he's horrible about having his changes in linux-next, so nobody was
ever really aware of this semantic conflict.

Al. Bad, bad boy. Consider yourself hit with a rolled-up newspaper.

                 Linus
fs/ceph/acl.c   | 103 +-------------------------------------------------------
 fs/ceph/inode.c |   3 +-
 fs/ceph/super.h |   3 --
 fs/ceph/xattr.c |   5 +--
 4 files changed, 6 insertions(+), 108 deletions(-)

Comments

Sage Weil Jan. 29, 2014, 6:08 a.m. UTC | #1

Hi Linus,

On Tue, 28 Jan 2014, Linus Torvalds wrote:
> On Tue, Jan 28, 2014 at 1:10 PM, Dave Jones <[e-mail]> wrote:
> >
> > This breaks the build for me.
> 
> It is my merge (Christoph's ACL changes came in today through the VFS
> tree from Al).
> 
> I was doing the merges today on my laptop (I had jury duty yesterday
> and today), and so I didn't do the allmodconfig build I would normally
> do on my (much faster) desktop. Well, actually I did do the full fs
> builds for the earlier pulls that actually had some conflicts, but not
> for the ceph pull. The conflict was hidden by the fact that the whole
> cifs ACL support is new, so there was no data conflict, just a silent
> semantic conflict between the new smarter ACL helpers and the new ACL
> use in CIFS.

s/cifs/ceph/ :)

> I'm back home now (yay, all the afternoon cases got settled), and I
> see the problem now. I should have done an allmodconfig build
> immediately after coming home, but I never even thought of it.
>
> Anyway, here's an *untested* conversion to the new posix acl helper
> infrastructure. I do wonder if ceph_init_acl() could be converted to
> posix_acl_create(), right now that part is a "non-conversion" - it's
> just made to use __posix_acl_create() that implements the old
> interface.
> 
> Al, Christoph, can you please check my conversion for sanity from a
> generic posix-acl standpoint?
> 
> Sage, Guangliang, Li, can you check the actual cifs usage/sanity of
> the attached patch?

Superficially at least the conversion looks okay to me, but it's not 
passing my smoke test (it's giving me EOPNOTSUPP for chmod and setxattr 
when setting an ACL).  I'll look at it tomorrow if Guangliang, Li, or Yan 
don't get there first.

I should have caught this before--I knew the ACL changes were coming and 
forgot to check the merged build beforehand!

sage
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Patch

diff --git a/fs/ceph/acl.c b/fs/ceph/acl.c
index 64fddbc1d17b..f6911284c9bd 100644
--- a/fs/ceph/acl.c
+++ b/fs/ceph/acl.c
@@ -213,7 +213,7 @@  int ceph_init_acl(struct dentry *dentry, struct inode *inode, struct inode *dir)
 			if (ret)
 				goto out_release;
 		}
-		ret = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
+		ret = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
 		if (ret < 0)
 			goto out;
 		else if (ret > 0)
@@ -229,104 +229,3 @@  out_release:
 out:
 	return ret;
 }
-
-int ceph_acl_chmod(struct dentry *dentry, struct inode *inode)
-{
-	struct posix_acl *acl;
-	int ret = 0;
-
-	if (S_ISLNK(inode->i_mode)) {
-		ret = -EOPNOTSUPP;
-		goto out;
-	}
-
-	if (!IS_POSIXACL(inode))
-		goto out;
-
-	acl = ceph_get_acl(inode, ACL_TYPE_ACCESS);
-	if (IS_ERR_OR_NULL(acl)) {
-		ret = PTR_ERR(acl);
-		goto out;
-	}
-
-	ret = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
-	if (ret)
-		goto out;
-	ret = ceph_set_acl(dentry, inode, acl, ACL_TYPE_ACCESS);
-	posix_acl_release(acl);
-out:
-	return ret;
-}
-
-static int ceph_xattr_acl_get(struct dentry *dentry, const char *name,
-				void *value, size_t size, int type)
-{
-	struct posix_acl *acl;
-	int ret = 0;
-
-	if (!IS_POSIXACL(dentry->d_inode))
-		return -EOPNOTSUPP;
-
-	acl = ceph_get_acl(dentry->d_inode, type);
-	if (IS_ERR(acl))
-		return PTR_ERR(acl);
-	if (acl == NULL)
-		return -ENODATA;
-
-	ret = posix_acl_to_xattr(&init_user_ns, acl, value, size);
-	posix_acl_release(acl);
-
-	return ret;
-}
-
-static int ceph_xattr_acl_set(struct dentry *dentry, const char *name,
-			const void *value, size_t size, int flags, int type)
-{
-	int ret = 0;
-	struct posix_acl *acl = NULL;
-
-	if (!inode_owner_or_capable(dentry->d_inode)) {
-		ret = -EPERM;
-		goto out;
-	}
-
-	if (!IS_POSIXACL(dentry->d_inode)) {
-		ret = -EOPNOTSUPP;
-		goto out;
-	}
-
-	if (value) {
-		acl = posix_acl_from_xattr(&init_user_ns, value, size);
-		if (IS_ERR(acl)) {
-			ret = PTR_ERR(acl);
-			goto out;
-		}
-
-		if (acl) {
-			ret = posix_acl_valid(acl);
-			if (ret)
-				goto out_release;
-		}
-	}
-
-	ret = ceph_set_acl(dentry, dentry->d_inode, acl, type);
-
-out_release:
-	posix_acl_release(acl);
-out:
-	return ret;
-}
-
-const struct xattr_handler ceph_xattr_acl_default_handler = {
-	.prefix = POSIX_ACL_XATTR_DEFAULT,
-	.flags  = ACL_TYPE_DEFAULT,
-	.get    = ceph_xattr_acl_get,
-	.set    = ceph_xattr_acl_set,
-};
-
-const struct xattr_handler ceph_xattr_acl_access_handler = {
-	.prefix = POSIX_ACL_XATTR_ACCESS,
-	.flags  = ACL_TYPE_ACCESS,
-	.get    = ceph_xattr_acl_get,
-	.set    = ceph_xattr_acl_set,
-};
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 6fc10a7d7c59..8b8b506636cc 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -9,6 +9,7 @@ 
 #include <linux/namei.h>
 #include <linux/writeback.h>
 #include <linux/vmalloc.h>
+#include <linux/posix_acl.h>
 
 #include "super.h"
 #include "mds_client.h"
@@ -1805,7 +1806,7 @@  int ceph_setattr(struct dentry *dentry, struct iattr *attr)
 		__mark_inode_dirty(inode, inode_dirty_flags);
 
 	if (ia_valid & ATTR_MODE) {
-		err = ceph_acl_chmod(dentry, inode);
+		err = posix_acl_chmod(inode, attr->ia_mode);
 		if (err)
 			goto out_put;
 	}
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index c299f7d19bf3..345933948b6e 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -736,15 +736,12 @@  extern void __init ceph_xattr_init(void);
 extern void ceph_xattr_exit(void);
 
 /* acl.c */
-extern const struct xattr_handler ceph_xattr_acl_access_handler;
-extern const struct xattr_handler ceph_xattr_acl_default_handler;
 extern const struct xattr_handler *ceph_xattr_handlers[];
 
 #ifdef CONFIG_CEPH_FS_POSIX_ACL
 
 struct posix_acl *ceph_get_acl(struct inode *, int);
 int ceph_init_acl(struct dentry *, struct inode *, struct inode *);
-int ceph_acl_chmod(struct dentry *, struct inode *);
 void ceph_forget_all_cached_acls(struct inode *inode);
 
 #else
diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c
index c7581f3733c1..898b6565ad3e 100644
--- a/fs/ceph/xattr.c
+++ b/fs/ceph/xattr.c
@@ -6,6 +6,7 @@ 
 #include <linux/ceph/decode.h>
 
 #include <linux/xattr.h>
+#include <linux/posix_acl_xattr.h>
 #include <linux/slab.h>
 
 #define XATTR_CEPH_PREFIX "ceph."
@@ -17,8 +18,8 @@ 
  */
 const struct xattr_handler *ceph_xattr_handlers[] = {
 #ifdef CONFIG_CEPH_FS_POSIX_ACL
-	&ceph_xattr_acl_access_handler,
-	&ceph_xattr_acl_default_handler,
+	&posix_acl_access_xattr_handler,
+	&posix_acl_default_xattr_handler,
 #endif
 	NULL,
 };