Messages in this thread | | | Date | Thu, 21 Mar 2013 17:41:18 -0400 | From | Dave Jones <> | Subject | Re: VFS deadlock ? |
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On Thu, Mar 21, 2013 at 09:26:17PM +0000, Al Viro wrote: > On Thu, Mar 21, 2013 at 02:18:15PM -0700, Linus Torvalds wrote: > > On Thu, Mar 21, 2013 at 2:02 PM, Dave Jones <davej@redhat.com> wrote: > > > > > > here we go... > > > > > > WARNING: at fs/namei.c:2335 lock_rename+0x156/0x160() > > > p1=irda p2=irda > > > > Ok, good. I ssupect it's /proc or /sys, we do have that entry there. > > > > But in fact I suspect we do want the parent name after all, because I > > think we have multiple "irda" directories. There's the one in > > /proc/net/ (added by net/irda/irproc.c), and there's a sysctl CTL_DIR > > "irda" directory (kernel/sysctl_binary.c). And there might even be a > > few other ones in /sys too, thanks to the ldisc called "irda" etc. > > > > I don't see where the shared inode comes from, but I suspect that > > would be easier to guess if we actually see which particular case it > > ends up being.. > > Well, something like > static char path[4096]; > d_absolute_path(p1, path, 4096); > printk(KERN_ERR "%s %s %d %d" > path, p1->d_sb->s_type->name, d_unlinked(p1), d_unlinked(p2)); > might be useful - pathname within fs, fs type and which of those suckers are > unlinked...
uh..
fs/namei.c:2342:3: warning: passing argument 1 of ‘d_absolute_path’ from incompatible pointer type [enabled by default] d_absolute_path(p1, path, 4096); ^ In file included from include/linux/fs.h:8:0, from fs/namei.c:21: include/linux/dcache.h:337:14: note: expected ‘const struct path *’ but argument is of type ‘struct dentry *’ extern char *d_absolute_path(const struct path *, char *, int); ^
How do I go from the dentry in p1 to the path d_absolute_path expects ?
Dave
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