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authorSteve French <sfrench@us.ibm.com>2008-04-15 18:40:48 +0000
committerSteve French <sfrench@us.ibm.com>2008-04-15 18:40:48 +0000
commit5d941ca628a142f44d7a2440fe919f8e8691f590 (patch)
treefb1028cc422187b2507f3830eac5dfc92c7eb29d /fs/cifs/transport.c
parente48d199ba10bb8267f491a3a585ca4a833e950a4 (diff)
[CIFS] Fix oops when slow oplock process races with unmount
If a tcon is being freed in call tconInfoFree, clean up any entries that may exist in global oplock queue as the tcon structure hanging off of those entries will be invalid and can cause oops while accesing any elements in the tcon structure. Signed-off-by: Shirish Pargaonkar <shirishp@us.ibm.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs/transport.c')
-rw-r--r--fs/cifs/transport.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 3612d6c0a0b..000ac509c98 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -142,6 +142,24 @@ void DeleteOplockQEntry(struct oplock_q_entry *oplockEntry)
kmem_cache_free(cifs_oplock_cachep, oplockEntry);
}
+
+void DeleteTconOplockQEntries(struct cifsTconInfo *tcon)
+{
+ struct oplock_q_entry *temp;
+
+ if (tcon == NULL)
+ return;
+
+ spin_lock(&GlobalMid_Lock);
+ list_for_each_entry(temp, &GlobalOplock_Q, qhead) {
+ if ((temp->tcon) && (temp->tcon == tcon)) {
+ list_del(&temp->qhead);
+ kmem_cache_free(cifs_oplock_cachep, temp);
+ }
+ }
+ spin_unlock(&GlobalMid_Lock);
+}
+
int
smb_send(struct socket *ssocket, struct smb_hdr *smb_buffer,
unsigned int smb_buf_length, struct sockaddr *sin)