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Message-ID: <20160107114253.19d92b55@canb.auug.org.au>
Date: Thu, 7 Jan 2016 11:42:53 +1100
From: Stephen Rothwell <sfr@...b.auug.org.au>
To: Al Viro <viro@...IV.linux.org.uk>
Cc: linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
Mike Marshall <hubcap@...ibond.com>
Subject: Re: linux-next: build failure after merge of the vfs tree
Hi all,
On Mon, 21 Dec 2015 11:23:01 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> On Thu, 10 Dec 2015 11:18:47 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> >
> > After merging the vfs tree, today's linux-next build (x86_64 allmodconfig)
> > failed like this:
> >
> > fs/orangefs/symlink.c:26:2: error: unknown field 'follow_link' specified in initializer
> > .follow_link = pvfs2_follow_link,
> > ^
> > fs/orangefs/symlink.c:26:17: warning: initialization from incompatible pointer type [-Wincompatible-pointer-types]
> > .follow_link = pvfs2_follow_link,
> > ^
> > fs/orangefs/symlink.c:26:17: note: (near initialization for 'pvfs2_symlink_inode_operations.put_link')
> >
> > Caused by commit
> >
> > 6b2553918d8b ("replace ->follow_link() with new method that could stay in RCU mode")
> >
> > [I wish there was some way to stage these API changes :-(]
> >
> > I applied the following merge fix patch (which may need more work):
> >
> > From: Stephen Rothwell <sfr@...b.auug.org.au>
> > Date: Thu, 10 Dec 2015 11:12:36 +1100
> > Subject: [PATCH] orangfs: update for follow_link to get_link change
> >
> > Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
> > ---
> > fs/orangefs/symlink.c | 12 +++++++++---
> > 1 file changed, 9 insertions(+), 3 deletions(-)
> >
> > diff --git a/fs/orangefs/symlink.c b/fs/orangefs/symlink.c
> > index 2adfceff7730..dbf24a98a3c9 100644
> > --- a/fs/orangefs/symlink.c
> > +++ b/fs/orangefs/symlink.c
> > @@ -8,9 +8,15 @@
> > #include "pvfs2-kernel.h"
> > #include "pvfs2-bufmap.h"
> >
> > -static const char *pvfs2_follow_link(struct dentry *dentry, void **cookie)
> > +static const char *pvfs2_get_link(struct dentry *dentry, struct inode *inode,
> > + void **cookie)
> > {
> > - char *target = PVFS2_I(dentry->d_inode)->link_target;
> > + char *target;
> > +
> > + if (!dentry)
> > + return ERR_PTR(-ECHILD);
> > +
> > + target = PVFS2_I(inode)->link_target;
> >
> > gossip_debug(GOSSIP_INODE_DEBUG,
> > "%s: called on %s (target is %p)\n",
> > @@ -23,7 +29,7 @@ static const char *pvfs2_follow_link(struct dentry *dentry, void **cookie)
> >
> > struct inode_operations pvfs2_symlink_inode_operations = {
> > .readlink = generic_readlink,
> > - .follow_link = pvfs2_follow_link,
> > + .get_link = pvfs2_get_link,
> > .setattr = pvfs2_setattr,
> > .getattr = pvfs2_getattr,
> > .listxattr = pvfs2_listxattr,
>
> This patch now looks like this (after changes to the orangefs tree):
>
> diff --git a/fs/orangefs/symlink.c b/fs/orangefs/symlink.c
> index 1b3ae63463dc..01977e88e95d 100644
> --- a/fs/orangefs/symlink.c
> +++ b/fs/orangefs/symlink.c
> @@ -8,9 +8,15 @@
> #include "orangefs-kernel.h"
> #include "orangefs-bufmap.h"
>
> -static const char *orangefs_follow_link(struct dentry *dentry, void **cookie)
> +static const char *orangefs_get_link(struct dentry *dentry, struct inode *inode,
> + void **cookie)
> {
> - char *target = ORANGEFS_I(dentry->d_inode)->link_target;
> + char *target;
> +
> + if (!dentry)
> + return ERR_PTR(-ECHILD);
> +
> + target = ORANGEFS_I(inode)->link_target;
>
> gossip_debug(GOSSIP_INODE_DEBUG,
> "%s: called on %s (target is %p)\n",
> @@ -23,7 +29,7 @@ static const char *orangefs_follow_link(struct dentry *dentry, void **cookie)
>
> struct inode_operations orangefs_symlink_inode_operations = {
> .readlink = generic_readlink,
> - .follow_link = orangefs_follow_link,
> + .get_link = orangefs_get_link,
> .setattr = orangefs_setattr,
> .getattr = orangefs_getattr,
> .listxattr = orangefs_listxattr,
This patch now looks like this (I think this is right):
From: Stephen Rothwell <sfr@...b.auug.org.au>
Date: Thu, 7 Jan 2016 11:37:17 +1100
Subject: [PATCH] orangfs: update for follow_link to get_link change
Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
---
fs/orangefs/symlink.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/fs/orangefs/symlink.c b/fs/orangefs/symlink.c
index 1b3ae63463dc..a21083790fb8 100644
--- a/fs/orangefs/symlink.c
+++ b/fs/orangefs/symlink.c
@@ -8,22 +8,26 @@
#include "orangefs-kernel.h"
#include "orangefs-bufmap.h"
-static const char *orangefs_follow_link(struct dentry *dentry, void **cookie)
+static const char *orangefs_get_link(struct dentry *dentry, struct inode *inode,
+ struct delayed_call *done)
{
- char *target = ORANGEFS_I(dentry->d_inode)->link_target;
+ char *target;
+
+ if (!dentry)
+ return ERR_PTR(-ECHILD);
+
+ target = ORANGEFS_I(dentry->d_inode)->link_target;
gossip_debug(GOSSIP_INODE_DEBUG,
"%s: called on %s (target is %p)\n",
__func__, (char *)dentry->d_name.name, target);
- *cookie = target;
-
return target;
}
struct inode_operations orangefs_symlink_inode_operations = {
.readlink = generic_readlink,
- .follow_link = orangefs_follow_link,
+ .get_link = orangefs_get_link,
.setattr = orangefs_setattr,
.getattr = orangefs_getattr,
.listxattr = orangefs_listxattr,
--
2.6.4
--
Cheers,
Stephen Rothwell sfr@...b.auug.org.au
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