d_splice_alias

Name:splice a disconnected dentry into the tree if one exists

Proto:struct dentry *d_splice_alias(struct inode *inode, struct dentry *dentry)

Type:struct dentry

Parameter:

Type	Parameter	Name
struct inode *	inode
struct dentry *	dentry

3002

If IS_ERR(inode) Then Return ERR_CAST - Explicitly cast an error-valued pointer to another pointer type*@ptr: The pointer to cast.* Explicitly cast an error-valued pointer to another pointer type in such a* way as to make it clear that's what's going on.

3005

BUG_ON(!d_unhashed - is dentry hashed*@dentry: entry to check* Returns true if the dentry passed is not currently hashed.)

3007

If Not inode Then Go to out

3010

security_d_instantiate(dentry, inode)

3011

spin_lock( & _blocks, i_bytes, maybe i_size )

3012

If S_ISDIR(i_mode) Then

3013

new = __d_find_any_alias(inode)

3014

If Value for the false possibility is greater at compile time(new) Then

3016

spin_unlock( & _blocks, i_bytes, maybe i_size )

3017

Lock out other writers and update the count.* Acts like a normal spin_lock/unlock.* Don't need preempt_disable() because that is in the spin_lock already.

3018

If Value for the false possibility is greater at compile time(d_ancestor - search for an ancestor*@p1: ancestor dentry*@p2: child dentry* Returns the ancestor dentry of p2 which is a child of p1, if p1 is* an ancestor of p2, else NULL.) Then

3019

write_sequnlock( & rename_lock)

3020

dput - release a dentry*@dentry: dentry to release * Release a dentry. This will drop the usage count and if appropriate* call the dentry unlink method as well as removing it from the queues and* releasing its resources

3021

new = ERR_PTR( - ELOOP)

3022

pr_warn_ratelimited("VFS: Lookup of '%s' in %s %s would have caused loop\n", name, name, s_id)

3028

Else if Not linux/include/linux/dcache.h* Dirent cache data structures* (C) Copyright 1997 Thomas Schoebel-Theuer,* with heavy changes by Linus Torvalds(new) Then

3029

old_parent = get a reference to a dentry

3030

err = This helper attempts to cope with remotely renamed directories* It assumes that the caller is already holding* Note: If ever the locking in lock_rename() changes, then please* remember to update this too...

3031

write_sequnlock( & rename_lock)

3032

If err Then

3033

dput - release a dentry*@dentry: dentry to release * Release a dentry. This will drop the usage count and if appropriate* call the dentry unlink method as well as removing it from the queues and* releasing its resources

3034

new = ERR_PTR(err)

3036

dput - release a dentry*@dentry: dentry to release * Release a dentry. This will drop the usage count and if appropriate* call the dentry unlink method as well as removing it from the queues and* releasing its resources

3037

Else

3038

__d_move - move a dentry*@dentry: entry to move*@target: new dentry*@exchange: exchange the two dentries* Update the dcache to reflect the move of a file name

3039

write_sequnlock( & rename_lock)

3041

3042

Return new

3045

out :

3046

__d_add(dentry, inode)

3047

Return NULL

**Caller**
Name	Describe
d_add_ci	d_add_ci - lookup or allocate new dentry with case-exact name@inode: the inode case-insensitive lookup has found@dentry: the negative dentry that was passed to the parent's lookup func*@name: the case-exact name to be associated with the returned

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