diff options
Diffstat (limited to 'fs/namei.c')
| -rw-r--r-- | fs/namei.c | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/fs/namei.c b/fs/namei.c index 2ec173f0d..8870e3a99 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -338,26 +338,39 @@ done_error: return result; } -/* - * This should check "link_count", but doesn't do that yet.. - */ static struct dentry * do_follow_link(struct dentry *base, struct dentry *dentry) { struct inode * inode = dentry->d_inode; if (inode && inode->i_op && inode->i_op->follow_link) { - struct dentry *result; + if (current->link_count < 5) { + struct dentry * result; - /* This eats the base */ - result = inode->i_op->follow_link(inode, base); - base = dentry; - dentry = result; + current->link_count++; + /* This eats the base */ + result = inode->i_op->follow_link(inode, base); + current->link_count--; + dput(dentry); + return result; + } + dput(dentry); + dentry = ERR_PTR(-ELOOP); } dput(base); return dentry; } /* + * Allow a filesystem to translate the character set of + * a file name. This allows for filesystems that are not + * case-sensitive, for example. + * + * This is only a dummy define right now, but eventually + * it might become something like "(parent)->d_charmap[c]" + */ +#define name_translate_char(parent, c) (c) + +/* * Name resolution. * * This is the basic name resolution function, turning a pathname @@ -397,6 +410,7 @@ struct dentry * lookup_dentry(const char * name, struct dentry * base, int follo c = *name; do { len++; name++; + c = name_translate_char(base, c); hash = partial_name_hash(c, hash); c = *name; } while (c && (c != '/')); |