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[CIFS] Incorrect hardlink count when original file is cached (oplocked)

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Fixes Samba bug 2823

In this case hardlink count is stale for one of the two inodes (ie the
original file) until it is closed - since revalidate does not go to
server while file is cached locally.

Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French 2006-11-16 20:54:20 +00:00
parent 237ee312e1
commit 31ec35d6c8
1 changed files with 23 additions and 10 deletions
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33
fs/cifs/link.c
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@ -69,17 +69,30 @@ cifs_hardlink(struct dentry *old_file, struct inode *inode,
rc = -EOPNOTSUPP;
}
/* if (!rc) */
{
/* renew_parental_timestamps(old_file);
inode->i_nlink++;
mark_inode_dirty(inode);
d_instantiate(direntry, inode); */
/* BB add call to either mark inode dirty or refresh its data and timestamp to current time */
d_drop(direntry); /* force new lookup from server of target */
/* if source file is cached (oplocked) revalidate will not go to server
until the file is closed or oplock broken so update nlinks locally */
if(old_file->d_inode) {
cifsInode = CIFS_I(old_file->d_inode);
if(rc == 0) {
old_file->d_inode->i_nlink++;
old_file->d_inode->i_ctime = CURRENT_TIME;
/* parent dir timestamps will update from srv
within a second, would it really be worth it
to set the parent dir cifs inode time to zero
to force revalidate (faster) for it too? */
}
/* if not oplocked will force revalidate to get info
on source file from srv */
cifsInode->time = 0;
/* Will update parent dir timestamps from srv within a second.
Would it really be worth it to set the parent dir (cifs
inode) time field to zero to force revalidate on parent
directory faster ie
CIFS_I(inode)->time = 0; */
}
d_drop(direntry); /* force new lookup from server */
cifsInode = CIFS_I(old_file->d_inode);
cifsInode->time = 0; /* will force revalidate to go get info when needed */
cifs_hl_exit:
kfree(fromName);