lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[CIFS] Do not attempt to close invalidated file handles

Browse Source 
If a connection with open file handles has gone down
and come back up and reconnected without reopening
the file handle yet, do not attempt to send an SMB close
request for this handle in cifs_close.  We were
checking for the connection being invalid in cifs_close
but since the connection may have been reconnected
we also need to check whether the file handle
was marked invalid (otherwise we could close the
wrong file handle by accident).

Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French
2008-11-20 20:00:44 +00:00
parent bfb59820ee
commit ddb4cbfc53
4 changed files with 30 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
fs/cifs/file.c
View File

@@ -488,12 +488,13 @@ int cifs_close(struct inode *inode, struct file *file)
pTcon = cifs_sb->tcon;
if (pSMBFile) {
struct cifsLockInfo *li, *tmp;
write_lock(&GlobalSMBSeslock);
pSMBFile->closePend = true;
if (pTcon) {
/* no sense reconnecting to close a file that is
already closed */
if (!pTcon->need_reconnect) {
write_unlock(&GlobalSMBSeslock);
timeout = 2;
while ((atomic_read(&pSMBFile->wrtPending) != 0)
&& (timeout <= 2048)) {
@@ -510,12 +511,15 @@ int cifs_close(struct inode *inode, struct file *file)
timeout *= 4;
}
if (atomic_read(&pSMBFile->wrtPending))
cERROR(1,
("close with pending writes"));
rc = CIFSSMBClose(xid, pTcon,
cERROR(1, ("close with pending write"));
if (!pTcon->need_reconnect &&
!pSMBFile->invalidHandle)
rc = CIFSSMBClose(xid, pTcon,
pSMBFile->netfid);
}
}
} else
write_unlock(&GlobalSMBSeslock);
} else
write_unlock(&GlobalSMBSeslock);
/* Delete any outstanding lock records.
We'll lose them when the file is closed anyway. */
@@ -587,15 +591,18 @@ int cifs_closedir(struct inode *inode, struct file *file)
pTcon = cifs_sb->tcon;
cFYI(1, ("Freeing private data in close dir"));
write_lock(&GlobalSMBSeslock);
if (!pCFileStruct->srch_inf.endOfSearch &&
!pCFileStruct->invalidHandle) {
pCFileStruct->invalidHandle = true;
write_unlock(&GlobalSMBSeslock);
rc = CIFSFindClose(xid, pTcon, pCFileStruct->netfid);
cFYI(1, ("Closing uncompleted readdir with rc %d",
rc));
/* not much we can do if it fails anyway, ignore rc */
rc = 0;
}
} else
write_unlock(&GlobalSMBSeslock);
ptmp = pCFileStruct->srch_inf.ntwrk_buf_start;
if (ptmp) {
cFYI(1, ("closedir free smb buf in srch struct"));