diff options
Diffstat (limited to 'fs/seq_file.c')
| -rw-r--r-- | fs/seq_file.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/fs/seq_file.c b/fs/seq_file.c index ae59f5a6c5c1..3f54dbd6c49b 100644 --- a/fs/seq_file.c +++ b/fs/seq_file.c @@ -393,6 +393,36 @@ int seq_path(struct seq_file *m, struct path *path, char *esc) EXPORT_SYMBOL(seq_path); /* + * Same as seq_path, but relative to supplied root. + * + * root may be changed, see __d_path(). + */ +int seq_path_root(struct seq_file *m, struct path *path, struct path *root, + char *esc) +{ + int err = -ENAMETOOLONG; + if (m->count < m->size) { + char *s = m->buf + m->count; + char *p; + + spin_lock(&dcache_lock); + p = __d_path(path, root, s, m->size - m->count); + spin_unlock(&dcache_lock); + err = PTR_ERR(p); + if (!IS_ERR(p)) { + s = mangle_path(s, p, esc); + if (s) { + p = m->buf + m->count; + m->count = s - m->buf; + return 0; + } + } + } + m->count = m->size; + return err; +} + +/* * returns the path of the 'dentry' from the root of its filesystem. */ int seq_dentry(struct seq_file *m, struct dentry *dentry, char *esc) |