d_add_ci (9) - Linux Manuals

d_add_ci: lookup or allocate new dentry with case-exact name

Command to display d_add_ci manual in Linux: $ man 9 d_add_ci

NAME

d_add_ci - lookup or allocate new dentry with case-exact name

SYNOPSIS

struct dentry * d_add_ci(struct dentry * dentry, struct inode * inode, struct qstr * name);

ARGUMENTS

dentry

: the negative dentry that was passed to the parent's lookup func

inode

: the inode case-insensitive lookup has found

name

: the case-exact name to be associated with the returned dentry

DESCRIPTION

This is to avoid filling the dcache with case-insensitive names to the same inode, only the actual correct case is stored in the dcache for case-insensitive filesystems.

For a case-insensitive lookup match and if the the case-exact dentry already exists in in the dcache, use it and return it.

If no entry exists with the exact case name, allocate new dentry with the exact case, and return the spliced entry.