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Message-ID: <alpine.LFD.2.21.1805151600430.28403@casper.infradead.org>
Date: Tue, 15 May 2018 16:01:28 +0100 (BST)
From: James Simmons <jsimmons@...radead.org>
To: NeilBrown <neilb@...e.com>
cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
devel@...verdev.osuosl.org,
Andreas Dilger <andreas.dilger@...el.com>,
Oleg Drokin <oleg.drokin@...el.com>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Lustre Development List <lustre-devel@...ts.lustre.org>,
Dmitry Eremin <dmitry.eremin@...el.com>,
"John L. Hammond" <john.hammond@...el.com>,
James Simmons <uja.ornl@...oo.com>
Subject: Re: [PATCH v2 1/5] staging: lustre: llite: add support set_acl method
in inode operations
> On Mon, May 14 2018, James Simmons wrote:
>
> > From: Dmitry Eremin <dmitry.eremin@...el.com>
> >
> > Linux kernel v3.14 adds set_acl method to inode operations.
> > This patch adds support to Lustre for proper acl management.
> >
> > Signed-off-by: Dmitry Eremin <dmitry.eremin@...el.com>
> > Signed-off-by: John L. Hammond <john.hammond@...el.com>
> > Signed-off-by: James Simmons <uja.ornl@...oo.com>
> > Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-9183
> > Reviewed-on: https://review.whamcloud.com/25965
> > Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-10541
> > Reviewed-on: https://review.whamcloud.com/31588
> > Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-10926
> > Reviewed-on: https://review.whamcloud.com/32045
> > Reviewed-by: Bob Glossman <bob.glossman@...el.com>
> > Reviewed-by: James Simmons <uja.ornl@...oo.com>
> > Reviewed-by: Andreas Dilger <andreas.dilger@...el.com>
> > Reviewed-by: Dmitry Eremin <dmitry.eremin@...el.com>
> > Reviewed-by: Oleg Drokin <oleg.drokin@...el.com>
> > Signed-off-by: James Simmons <jsimmons@...radead.org>
> > ---
> > Changelog:
> >
> > v1) Initial patch ported to staging tree
> > v2) Fixed up goto handling and avoid BUG() when calling
> > forget_cached_acl()with invalid type as pointed out by Dan Carpenter
> >
> > drivers/staging/lustre/lustre/llite/file.c | 62 ++++++++++++++++++++++
> > .../staging/lustre/lustre/llite/llite_internal.h | 4 ++
> > drivers/staging/lustre/lustre/llite/namei.c | 10 +++-
> > 3 files changed, 74 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/staging/lustre/lustre/llite/file.c b/drivers/staging/lustre/lustre/llite/file.c
> > index 0026fde..64a5698 100644
> > --- a/drivers/staging/lustre/lustre/llite/file.c
> > +++ b/drivers/staging/lustre/lustre/llite/file.c
> > @@ -3030,6 +3030,7 @@ static int ll_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
> > return rc;
> > }
> >
> > +#ifdef CONFIG_FS_POSIX_ACL
>
> Using #ifdef in .c files is generally discouraged.
> The "standard" approach here is:
> - put the acl code in a separate file (acl.c)
> - optionally include it via the Make file
> lustre-$(CONFIG_FS_POSIX_ACL) += acl.o
>
> - in the header where ll_get_acl and ll_set_acl are declared have
> #ifdef CONFIG_FS_POSIX_ACL
> declare the functions
> #else
> #define ll_get_acl NULL
> #define ll_set_acl NULL
> #endif
>
> Now as this is staging and that is (presumably) an upstream patch
> lightly improved it is probably fine to include the patch as-is,
> but in that case we will probably want to fix it up later.
So you want Lustre to be like everyone else :-)
Okay I will fix up and send a new patch series.
> Thanks,
> NeilBrown
>
> > struct posix_acl *ll_get_acl(struct inode *inode, int type)
> > {
> > struct ll_inode_info *lli = ll_i2info(inode);
> > @@ -3043,6 +3044,64 @@ struct posix_acl *ll_get_acl(struct inode *inode, int type)
> > return acl;
> > }
> >
> > +int ll_set_acl(struct inode *inode, struct posix_acl *acl, int type)
> > +{
> > + struct ll_sb_info *sbi = ll_i2sbi(inode);
> > + struct ptlrpc_request *req = NULL;
> > + const char *name = NULL;
> > + size_t value_size = 0;
> > + char *value = NULL;
> > + int rc;
> > +
> > + switch (type) {
> > + case ACL_TYPE_ACCESS:
> > + name = XATTR_NAME_POSIX_ACL_ACCESS;
> > + if (acl)
> > + rc = posix_acl_update_mode(inode, &inode->i_mode, &acl);
> > + break;
> > +
> > + case ACL_TYPE_DEFAULT:
> > + name = XATTR_NAME_POSIX_ACL_DEFAULT;
> > + if (!S_ISDIR(inode->i_mode))
> > + rc = acl ? -EACCES : 0;
> > + break;
> > +
> > + default:
> > + rc = -EINVAL;
> > + break;
> > + }
> > + if (rc)
> > + return rc;
> > +
> > + if (acl) {
> > + value_size = posix_acl_xattr_size(acl->a_count);
> > + value = kmalloc(value_size, GFP_NOFS);
> > + if (!value) {
> > + rc = -ENOMEM;
> > + goto out;
> > + }
> > +
> > + rc = posix_acl_to_xattr(&init_user_ns, acl, value, value_size);
> > + if (rc < 0)
> > + goto out_value;
> > + }
> > +
> > + rc = md_setxattr(sbi->ll_md_exp, ll_inode2fid(inode),
> > + value ? OBD_MD_FLXATTR : OBD_MD_FLXATTRRM,
> > + name, value, value_size, 0, 0, 0, &req);
> > +
> > + ptlrpc_req_finished(req);
> > +out_value:
> > + kfree(value);
> > +out:
> > + if (rc)
> > + forget_cached_acl(inode, type);
> > + else
> > + set_cached_acl(inode, type, acl);
> > + return rc;
> > +}
> > +#endif /* CONFIG_FS_POSIX_ACL */
> > +
> > int ll_inode_permission(struct inode *inode, int mask)
> > {
> > struct ll_sb_info *sbi;
> > @@ -3164,7 +3223,10 @@ int ll_inode_permission(struct inode *inode, int mask)
> > .permission = ll_inode_permission,
> > .listxattr = ll_listxattr,
> > .fiemap = ll_fiemap,
> > +#ifdef CONFIG_FS_POSIX_ACL
> > .get_acl = ll_get_acl,
> > + .set_acl = ll_set_acl,
> > +#endif
> > };
> >
> > /* dynamic ioctl number support routines */
> > diff --git a/drivers/staging/lustre/lustre/llite/llite_internal.h b/drivers/staging/lustre/lustre/llite/llite_internal.h
> > index 6504850..2280327 100644
> > --- a/drivers/staging/lustre/lustre/llite/llite_internal.h
> > +++ b/drivers/staging/lustre/lustre/llite/llite_internal.h
> > @@ -754,7 +754,11 @@ enum ldlm_mode ll_take_md_lock(struct inode *inode, __u64 bits,
> > int ll_md_real_close(struct inode *inode, fmode_t fmode);
> > int ll_getattr(const struct path *path, struct kstat *stat,
> > u32 request_mask, unsigned int flags);
> > +#ifdef CONFIG_FS_POSIX_ACL
> > struct posix_acl *ll_get_acl(struct inode *inode, int type);
> > +int ll_set_acl(struct inode *inode, struct posix_acl *acl, int type);
> > +#endif /* CONFIG_FS_POSIX_ACL */
> > +
> > int ll_migrate(struct inode *parent, struct file *file, int mdtidx,
> > const char *name, int namelen);
> > int ll_get_fid_by_name(struct inode *parent, const char *name,
> > diff --git a/drivers/staging/lustre/lustre/llite/namei.c b/drivers/staging/lustre/lustre/llite/namei.c
> > index 9ac7f09..b41f189 100644
> > --- a/drivers/staging/lustre/lustre/llite/namei.c
> > +++ b/drivers/staging/lustre/lustre/llite/namei.c
> > @@ -1195,7 +1195,10 @@ static int ll_rename(struct inode *src, struct dentry *src_dchild,
> > .getattr = ll_getattr,
> > .permission = ll_inode_permission,
> > .listxattr = ll_listxattr,
> > - .get_acl = ll_get_acl,
> > +#ifdef CONFIG_FS_POSIX_ACL
> > + .get_acl = ll_get_acl,
> > + .set_acl = ll_set_acl,
> > +#endif
> > };
> >
> > const struct inode_operations ll_special_inode_operations = {
> > @@ -1203,5 +1206,8 @@ static int ll_rename(struct inode *src, struct dentry *src_dchild,
> > .getattr = ll_getattr,
> > .permission = ll_inode_permission,
> > .listxattr = ll_listxattr,
> > - .get_acl = ll_get_acl,
> > +#ifdef CONFIG_FS_POSIX_ACL
> > + .get_acl = ll_get_acl,
> > + .set_acl = ll_set_acl,
> > +#endif
> > };
> > --
> > 1.8.3.1
>
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