On Wed, Jan 29, 2014 at 8:37 AM, Ilya Dryomov <ilya.dryomov@xxxxxxxxxxx> wrote:
> From: Sage Weil <sage@xxxxxxxxxxx>
>
> 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@xxxxxxxxxxx>
Ok, I already committed my untested (and broken) patch yesterday,
because even a broken tree is better than a non-*compiling* tree for
testing.
I created a diff from my current tree to this, and will happily apply
it, but the sign-off chain is now broken (Ilya didn't sign off on his
changes to Sage's patch. Not that it really matters for what is really
a one-liner change, but I thought I'd mention it, since another issue
came up with this patch..
Ceph now does
struct dentry *dentry = d_find_alias(inode);
in its ceph_set_acl() function, and that's because the VFS layer
doesn't pass down the dentry to the acl code any more.
Christoph - that sounds like a misfeature in the new interfaces. I
realize that for traditional unix filesystems, the path is irrelevant
for an inode operation, but the thing is, from a Linux VFS standpoint
and a conceptual standpoint, the dentry really is the more important
and unique one, and some filesystems want the dentry because they are
*correctly* designed to be about pathnames.
Network filesystems that are pass file descriptors around (ie NFS etc)
are not the "RightWay(tm)" of doing things, so I think that it is
quite reasonable for ceph to want the *path* to the inode and not just
the inode.
So attached is the incremental diff of the patch by Sage and Ilya, and
I'll apply it (delayed a bit to see if I can get the sign-off from
Ilya), but I also think we should fix the (non-cached) ACL functions
that call down to the filesystem layer to also get the dentry.
We already do that for the xattr functions, just not for
get_acl()/set_acl()/acl_chmod().
Christoph, Al? Yes, most filesystems will ignore the dentry pointer, but still..
Linus
fs/ceph/acl.c | 9 ++++-----
fs/ceph/dir.c | 1 +
fs/ceph/inode.c | 2 ++
fs/ceph/super.h | 3 +++
4 files changed, 10 insertions(+), 5 deletions(-)
diff --git a/fs/ceph/acl.c b/fs/ceph/acl.c
index f6911284c9bd..66d377a12f7c 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);
@@ -208,8 +208,7 @@ 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;
}
@@ -217,7 +216,7 @@ int ceph_init_acl(struct dentry *dentry, struct inode *inode, struct inode *dir)
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 {
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 619616d585b0..6da4df84ba30 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 8b8b506636cc..32d519d8a2e2 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -97,6 +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,
};
@@ -1616,6 +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,
};
/*
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 345933948b6e..aa260590f615 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);
@@ -741,12 +742,14 @@ 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 *);
void ceph_forget_all_cached_acls(struct inode *inode);
#else
#define ceph_get_acl NULL
+#define ceph_set_acl NULL
static inline int ceph_init_acl(struct dentry *dentry, struct inode *inode,
struct inode *dir)
