Re: [GIT PULL] Ceph updates for -rc1

Ilya Dryomov
2014-01-29T16:36:54Z

On Wed, Jan 29, 2014 at 4:30 PM, Sage Weil <sage@inktank.com> wrote:
> On Tue, 28 Jan 2014, Sage Weil wrote:
>> Hi Linus,
>>
>> On Tue, 28 Jan 2014, Linus Torvalds wrote:
>> > On Tue, Jan 28, 2014 at 1:10 PM, Dave Jones <davej@redhat.com> 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.
>
> The set_acl inode_operation wasn't getting set, and the prototype needed
> to be adjusted a bit (it doesn't take a dentry anymore). All seems to be
> well with the below patch.
>
> Thanks!
> sage
>
>
> From 01baa54e113060eb9147548fe7beb572522a645a Mon Sep 17 00:00:00 2001
> From: Sage Weil <sage@inktank.com>
> Date: Wed, 29 Jan 2014 06:22:25 -0800
> Subject: [PATCH] ceph: fix posix ACL hooks
>
> The merge of 7221fe4c2 raced with upstream changes in the generic POSIX
> ACL code (2aeccbe95). Update Ceph to use the new helpers as well by
> dropping the now-generic functions and setting the set_acl inode op.
>
> Signed-off-by: Sage Weil <sage@inktank.com>
> ---
> fs/ceph/acl.c | 112 +++-----------------------------------------------------
> fs/ceph/dir.c | 1 +
> fs/ceph/inode.c | 5 ++-
> fs/ceph/super.h | 5 +--
> fs/ceph/xattr.c | 5 ++-
> 5 files changed, 15 insertions(+), 113 deletions(-)
>
> diff --git a/fs/ceph/acl.c b/fs/ceph/acl.c
> index 64fddbc..66d377a 100644
> --- a/fs/ceph/acl.c
> +++ b/fs/ceph/acl.c
> @@ -107,14 +107,14 @@ struct posix_acl *ceph_get_acl(struct inode *inode, int type)
> return acl;
> }
>
> -static int ceph_set_acl(struct dentry *dentry, struct inode *inode,
> - struct posix_acl *acl, int type)
> +int ceph_set_acl(struct inode *inode, struct posix_acl *acl, int type)
> {
> int ret = 0, size = 0;
> const char *name = NULL;
> char *value = NULL;
> struct iattr newattrs;
> umode_t new_mode = inode->i_mode, old_mode = inode->i_mode;
> + struct dentry *dentry = d_find_alias(inode);
>
> if (acl) {
> ret = posix_acl_valid(acl);
> @@ -208,16 +208,15 @@ int ceph_init_acl(struct dentry *dentry, struct inode *inode, struct inode *dir)
>
> if (IS_POSIXACL(dir) && acl) {
> if (S_ISDIR(inode->i_mode)) {
> - ret = ceph_set_acl(dentry, inode, acl,
> - ACL_TYPE_DEFAULT);
> + ret = ceph_set_acl(inode, acl, ACL_TYPE_DEFAULT);
> 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)
> - ret = ceph_set_acl(dentry, inode, acl, ACL_TYPE_ACCESS);
> + ret = ceph_set_acl(inode, acl, ACL_TYPE_ACCESS);
> else
> cache_no_acl(inode);
> } else {
> @@ -229,104 +228,3 @@ 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/dir.c b/fs/ceph/dir.c
> index 619616d..6da4df8 100644
> --- a/fs/ceph/dir.c
> +++ b/fs/ceph/dir.c
> @@ -1303,6 +1303,7 @@ const struct inode_operations ceph_dir_iops = {
> .listxattr = ceph_listxattr,
> .removexattr = ceph_removexattr,
> .get_acl = ceph_get_acl,
> + .set_acl = ceph_set_acl,
> .mknod = ceph_mknod,
> .symlink = ceph_symlink,
> .mkdir = ceph_mkdir,
> diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
> index 6fc10a7..32d519d 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"
> @@ -96,6 +97,7 @@ const struct inode_operations ceph_file_iops = {
> .listxattr = ceph_listxattr,
> .removexattr = ceph_removexattr,
> .get_acl = ceph_get_acl,
> + .set_acl = ceph_set_acl,
> };
>
>
> @@ -1615,6 +1617,7 @@ static const struct inode_operations ceph_symlink_iops = {
> .listxattr = ceph_listxattr,
> .removexattr = ceph_removexattr,
> .get_acl = ceph_get_acl,
> + .set_acl = ceph_set_acl,
> };
>
> /*
> @@ -1805,7 +1808,7 @@ 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 c299f7d..eabf601 100644
> --- a/fs/ceph/super.h
> +++ b/fs/ceph/super.h
> @@ -718,6 +718,7 @@ extern void ceph_queue_writeback(struct inode *inode);
> extern int ceph_do_getattr(struct inode *inode, int mask);
> extern int ceph_permission(struct inode *inode, int mask);
> extern int ceph_setattr(struct dentry *dentry, struct iattr *attr);
> +extern int ceph_setattr(struct dentry *dentry, struct iattr *attr);
> extern int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry,
> struct kstat *stat);
>
> @@ -736,15 +737,13 @@ 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_set_acl(struct inode *inode, struct posix_acl *acl, int type);
> 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

Sage missed the '#define ceph_set_acl NULL' for the !CEPH_FS_POSIX_ACL
case. v2 should be in-reply-to this message.

Thanks,

Ilya