Messages in this thread | | | Date | Thu, 5 Sep 2013 15:56:13 +0100 | From | Al Viro <> | Subject | Re: [PATCH 04/11] vfs: check unlinked ancestors before mount |
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I'd probably just do this, and to hell with helper functions...
int d_set_mounted(struct dentry *dentry) { struct dentry *p; int ret = 0; write_seqlock(&rename_lock); for (p = dentry; !IS_ROOT(p); p = p->d_parent) { /* Need exclusion wrt. check_submounts_and_drop() */ spin_lock(&p->d_lock); if (unlikely(d_unhashed(p))) { spin_unlock(&p->d_lock); ret = -ENOENT; goto out; } spin_unlock(&p->d_lock); } spin_lock(&dentry->d_lock); dentry->d_flags |= DCACHE_MOUNTED; spin_unlock(&dentry->d_lock); out: write_sequnlock(&rename_lock); return ret; }
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