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authorEric W. Biederman <ebiederm@xmission.com>2014-07-31 03:10:50 -0700
committerEric W. Biederman <ebiederm@xmission.com>2014-08-04 10:07:11 -0700
commit0097875bd41528922fb3bb5f348c53f17e00e2fd (patch)
tree414cffac820d04e4542dc7654e7ef188f00ba0b2 /fs/proc/inode.c
parent6ba8ed79a3cce14bd5597218fd46408b8376f8f3 (diff)
downloadop-kernel-dev-0097875bd41528922fb3bb5f348c53f17e00e2fd.zip
op-kernel-dev-0097875bd41528922fb3bb5f348c53f17e00e2fd.tar.gz
proc: Implement /proc/thread-self to point at the directory of the current thread
/proc/thread-self is derived from /proc/self. /proc/thread-self points to the directory in proc containing information about the current thread. This funtionality has been missing for a long time, and is tricky to implement in userspace as gettid() is not exported by glibc. More importantly this allows fixing defects in /proc/mounts and /proc/net where in a threaded application today they wind up being empty files when only the initial pthread has exited, causing problems for other threads. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'fs/proc/inode.c')
-rw-r--r--fs/proc/inode.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 0adbc02..333080d 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -442,6 +442,7 @@ struct inode *proc_get_inode(struct super_block *sb, struct proc_dir_entry *de)
int proc_fill_super(struct super_block *s)
{
struct inode *root_inode;
+ int ret;
s->s_flags |= MS_NODIRATIME | MS_NOSUID | MS_NOEXEC;
s->s_blocksize = 1024;
@@ -463,5 +464,9 @@ int proc_fill_super(struct super_block *s)
return -ENOMEM;
}
- return proc_setup_self(s);
+ ret = proc_setup_self(s);
+ if (ret) {
+ return ret;
+ }
+ return proc_setup_thread_self(s);
}
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