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);
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)
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)
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
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
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) {
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())
}
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
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;
}
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;
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;
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;
* 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);
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff