1 files changed, 60 insertions, 127 deletions

diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index a3634e43bd4f..8c81e7b14d53 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -238,7 +238,6 @@ cifs_new_fileinfo(__u16 fileHandle, struct file *file,
         pCifsFile->dentry = dget(dentry);
         pCifsFile->f_flags = file->f_flags;
         pCifsFile->invalidHandle = false;
-        pCifsFile->closePend = false;
         pCifsFile->tlink = cifs_get_tlink(tlink);
         mutex_init(&pCifsFile->fh_mutex);
         mutex_init(&pCifsFile->lock_mutex);
@@ -266,14 +265,55 @@ cifs_new_fileinfo(__u16 fileHandle, struct file *file,
         return pCifsFile;
 }
 
-/* Release a reference on the file private data */
+/*
+ * Release a reference on the file private data. This may involve closing
+ * the filehandle out on the server.
+ */
 void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
 {
-        if (atomic_dec_and_test(&cifs_file->count)) {
-                cifs_put_tlink(cifs_file->tlink);
-                dput(cifs_file->dentry);
-                kfree(cifs_file);
+        struct cifsTconInfo *tcon = tlink_tcon(cifs_file->tlink);
+        struct cifsInodeInfo *cifsi = CIFS_I(cifs_file->dentry->d_inode);
+        struct cifsLockInfo *li, *tmp;
+
+        spin_lock(&cifs_file_list_lock);
+        if (!atomic_dec_and_test(&cifs_file->count)) {
+                spin_unlock(&cifs_file_list_lock);
+                return;
+        }
+
+        /* remove it from the lists */
+        list_del(&cifs_file->flist);
+        list_del(&cifs_file->tlist);
+
+        if (list_empty(&cifsi->openFileList)) {
+                cFYI(1, "closing last open instance for inode %p",
+                        cifs_file->dentry->d_inode);
+                cifsi->clientCanCacheRead = false;
+                cifsi->clientCanCacheAll  = false;
+        }
+        spin_unlock(&cifs_file_list_lock);
+
+        if (!tcon->need_reconnect && !cifs_file->invalidHandle) {
+                int xid, rc;
+
+                xid = GetXid();
+                rc = CIFSSMBClose(xid, tcon, cifs_file->netfid);
+                FreeXid(xid);
+        }
+
+        /* Delete any outstanding lock records. We'll lose them when the file
+         * is closed anyway.
+         */
+        mutex_lock(&cifs_file->lock_mutex);
+        list_for_each_entry_safe(li, tmp, &cifs_file->llist, llist) {
+                list_del(&li->llist);
+                kfree(li);
         }
+        mutex_unlock(&cifs_file->lock_mutex);
+
+        cifs_put_tlink(cifs_file->tlink);
+        dput(cifs_file->dentry);
+        kfree(cifs_file);
 }
 
 int cifs_open(struct inode *inode, struct file *file)
@@ -605,79 +645,11 @@ reopen_error_exit:
 
 int cifs_close(struct inode *inode, struct file *file)
 {
-        int rc = 0;
-        int xid, timeout;
-        struct cifs_sb_info *cifs_sb;
-        struct cifsTconInfo *pTcon;
-        struct cifsFileInfo *pSMBFile = file->private_data;
-
-        xid = GetXid();
-
-        cifs_sb = CIFS_SB(inode->i_sb);
-        pTcon = tlink_tcon(pSMBFile->tlink);
-        if (pSMBFile) {
-                struct cifsLockInfo *li, *tmp;
-                spin_lock(&cifs_file_list_lock);
-                pSMBFile->closePend = true;
-                if (pTcon) {
-                        /* no sense reconnecting to close a file that is
-                           already closed */
-                        if (!pTcon->need_reconnect) {
-                                spin_unlock(&cifs_file_list_lock);
-                                timeout = 2;
-                                while ((atomic_read(&pSMBFile->count) != 1)
-                                        && (timeout <= 2048)) {
-                                        /* Give write a better chance to get to
-                                        server ahead of the close.  We do not
-                                        want to add a wait_q here as it would
-                                        increase the memory utilization as
-                                        the struct would be in each open file,
-                                        but this should give enough time to
-                                        clear the socket */
-                                        cFYI(DBG2, "close delay, write pending");
-                                        msleep(timeout);
-                                        timeout *= 4;
-                                }
-                                if (!pTcon->need_reconnect &&
-                                    !pSMBFile->invalidHandle)
-                                        rc = CIFSSMBClose(xid, pTcon,
-                                                  pSMBFile->netfid);
-                        } else
-                                spin_unlock(&cifs_file_list_lock);
-                } else
-                        spin_unlock(&cifs_file_list_lock);
-
-                /* Delete any outstanding lock records.
-                   We'll lose them when the file is closed anyway. */
-                mutex_lock(&pSMBFile->lock_mutex);
-                list_for_each_entry_safe(li, tmp, &pSMBFile->llist, llist) {
-                        list_del(&li->llist);
-                        kfree(li);
-                }
-                mutex_unlock(&pSMBFile->lock_mutex);
+        cifsFileInfo_put(file->private_data);
+        file->private_data = NULL;
 
-                spin_lock(&cifs_file_list_lock);
-                list_del(&pSMBFile->flist);
-                list_del(&pSMBFile->tlist);
-                spin_unlock(&cifs_file_list_lock);
-                cifsFileInfo_put(file->private_data);
-                file->private_data = NULL;
-        } else
-                rc = -EBADF;
-
-        spin_lock(&cifs_file_list_lock);
-        if (list_empty(&(CIFS_I(inode)->openFileList))) {
-                cFYI(1, "closing last open instance for inode %p", inode);
-                /* if the file is not open we do not know if we can cache info
-                   on this inode, much less write behind and read ahead */
-                CIFS_I(inode)->clientCanCacheRead = false;
-                CIFS_I(inode)->clientCanCacheAll  = false;
-        }
-        spin_unlock(&cifs_file_list_lock);
-        if ((rc == 0) && CIFS_I(inode)->write_behind_rc)
-                rc = CIFS_I(inode)->write_behind_rc;
-        FreeXid(xid);
-        return rc;
+        /* return code from the ->release op is always ignored */
+        return 0;
 }
 
 int cifs_closedir(struct inode *inode, struct file *file)
@@ -1024,13 +996,6 @@ ssize_t cifs_user_write(struct file *file, const char __user *write_data,
                            we blocked so return what we managed to write */
                                 return total_written;
                         }
-                        if (open_file->closePend) {
-                                FreeXid(xid);
-                                if (total_written)
-                                        return total_written;
-                                else
-                                        return -EBADF;
-                        }
                         if (open_file->invalidHandle) {
                                 /* we could deadlock if we called
                                    filemap_fdatawait from here so tell
@@ -1111,13 +1076,6 @@ static ssize_t cifs_write(struct cifsFileInfo *open_file,
              total_written += bytes_written) {
                 rc = -EAGAIN;
                 while (rc == -EAGAIN) {
-                        if (open_file->closePend) {
-                                FreeXid(xid);
-                                if (total_written)
-                                        return total_written;
-                                else
-                                        return -EBADF;
-                        }
                         if (open_file->invalidHandle) {
                                 /* we could deadlock if we called
                                    filemap_fdatawait from here so tell
@@ -1197,8 +1155,6 @@ struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *cifs_inode,
            are always at the end of the list but since the first entry might
            have a close pending, we go through the whole list */
         list_for_each_entry(open_file, &cifs_inode->openFileList, flist) {
-                if (open_file->closePend)
-                        continue;
                 if (fsuid_only && open_file->uid != current_fsuid())
                         continue;
                 if (OPEN_FMODE(open_file->f_flags) & FMODE_READ) {
@@ -1244,8 +1200,6 @@ struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *cifs_inode,
         spin_lock(&cifs_file_list_lock);
 refind_writable:
         list_for_each_entry(open_file, &cifs_inode->openFileList, flist) {
-                if (open_file->closePend)
-                        continue;
                 if (!any_available && open_file->pid != current->tgid)
                         continue;
                 if (fsuid_only && open_file->uid != current_fsuid())
@@ -1260,34 +1214,18 @@ refind_writable:
                         }
 
                         spin_unlock(&cifs_file_list_lock);
+
                         /* Had to unlock since following call can block */
                         rc = cifs_reopen_file(open_file, false);
-                        if (!rc) {
-                                if (!open_file->closePend)
-                                        return open_file;
-                                else { /* start over in case this was deleted */
-                                       /* since the list could be modified */
-                                        spin_lock(&cifs_file_list_lock);
-                                        cifsFileInfo_put(open_file);
-                                        goto refind_writable;
-                                }
-                        }
+                        if (!rc)
+                                return open_file;
 
-                        /* if it fails, try another handle if possible -
-                        (we can not do this if closePending since
-                        loop could be modified - in which case we
-                        have to start at the beginning of the list
-                        again. Note that it would be bad
-                        to hold up writepages here (rather than
-                        in caller) with continuous retries */
+                        /* if it fails, try another handle if possible */
                         cFYI(1, "wp failed on reopen file");
-                        spin_lock(&cifs_file_list_lock);
-                        /* can not use this handle, no write
-                           pending on this one after all */
                         cifsFileInfo_put(open_file);
 
-                        if (open_file->closePend) /* list could have changed */
-                                goto refind_writable;
+                        spin_lock(&cifs_file_list_lock);
+
                         /* else we simply continue to the next entry. Thus
                            we do not loop on reopen errors.  If we
                            can not reopen the file, for example if we
@@ -1808,8 +1746,7 @@ ssize_t cifs_user_read(struct file *file, char __user *read_data,
                 smb_read_data = NULL;
                 while (rc == -EAGAIN) {
                         int buf_type = CIFS_NO_BUFFER;
-                        if ((open_file->invalidHandle) &&
-                            (!open_file->closePend)) {
+                        if (open_file->invalidHandle) {
                                 rc = cifs_reopen_file(open_file, true);
                                 if (rc != 0)
                                         break;
@@ -1894,8 +1831,7 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size,
                 }
                 rc = -EAGAIN;
                 while (rc == -EAGAIN) {
-                        if ((open_file->invalidHandle) &&
-                            (!open_file->closePend)) {
+                        if (open_file->invalidHandle) {
                                 rc = cifs_reopen_file(open_file, true);
                                 if (rc != 0)
                                         break;
@@ -2059,8 +1995,7 @@ static int cifs_readpages(struct file *file, struct address_space *mapping,
                                 read_size, contig_pages);
                 rc = -EAGAIN;
                 while (rc == -EAGAIN) {
-                        if ((open_file->invalidHandle) &&
-                            (!open_file->closePend)) {
+                        if (open_file->invalidHandle) {
                                 rc = cifs_reopen_file(open_file, true);
                                 if (rc != 0)
                                         break;
@@ -2212,8 +2147,6 @@ static int is_inode_writable(struct cifsInodeInfo *cifs_inode)
 
         spin_lock(&cifs_file_list_lock);
         list_for_each_entry(open_file, &cifs_inode->openFileList, flist) {
-                if (open_file->closePend)
-                        continue;
                 if (OPEN_FMODE(open_file->f_flags) & FMODE_WRITE) {
                         spin_unlock(&cifs_file_list_lock);
                         return 1;
@@ -2372,7 +2305,7 @@ void cifs_oplock_break(struct work_struct *work)
          * not bother sending an oplock release if session to server still is
          * disconnected since oplock already released by the server
          */
-        if (!cfile->closePend && !cfile->oplock_break_cancelled) {
+        if (!cfile->oplock_break_cancelled) {
                 rc = CIFSSMBLock(0, tlink_tcon(cfile->tlink), cfile->netfid, 0,
                                  0, 0, 0, LOCKING_ANDX_OPLOCK_RELEASE, false);
                 cFYI(1, "Oplock release rc = %d", rc);