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iget: introduce a function to register iget failure

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Introduce a function to register failure in an inode construction path.  This
includes marking the inode under construction as bad, unlocking it and
releasing it.

Signed-off-by: David Howells <[email protected]>
Acked-by: Christoph Hellwig <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
David Howells 2008-02-07 00:15:27 -08:00 • committed by Linus Torvalds
commit b46980feed
3 changed files with 28 additions and 5 deletions
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18
Documentation/filesystems/porting
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@ -184,11 +184,19 @@ just takes the superblock and inode number as arguments and does the
test and set for you.
e.g.
inode = iget_locked(sb, ino);
if (inode->i_state & I_NEW) {
read_inode_from_disk(inode);
unlock_new_inode(inode);
}
inode = iget_locked(sb, ino);
if (inode->i_state & I_NEW) {
err = read_inode_from_disk(inode);
if (err < 0) {
iget_failed(inode);
return err;
}
unlock_new_inode(inode);
}
Note that if the process of setting up a new inode fails, then iget_failed()
should be called on the inode to render it dead, and an appropriate error
should be passed back to the caller.
---
[recommended]