cifs: convert oplock breaks to use slow_work facility (try #4)
This is the fourth respin of the patch to convert oplock breaks to use the slow_work facility. A customer of ours was testing a backport of one of the earlier patchsets, and hit a "Busy inodes after umount..." problem. An oplock break job had raced with a umount, and the superblock got torn down and its memory reused. When the oplock break job tried to dereference the inode->i_sb, the kernel oopsed. This patchset has the oplock break job hold an inode and vfsmount reference until the oplock break completes. With this, there should be no need to take a tcon reference (the vfsmount implicitly holds one already). Currently, when an oplock break comes in there's a chance that the oplock break job won't occur if the allocation of the oplock_q_entry fails. There are also some rather nasty races in the allocation and handling these structs. Rather than allocating oplock queue entries when an oplock break comes in, add a few extra fields to the cifsFileInfo struct. Get rid of the dedicated cifs_oplock_thread as well and queue the oplock break job to the slow_work thread pool. This approach also has the advantage that the oplock break jobs can potentially run in parallel rather than be serialized like they are today. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Jeff Layton
Steve French
Родитель
48541bd3dd
Коммит
3bc303c254
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@ -2,6 +2,7 @@ config CIFS
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tristate "CIFS support (advanced network filesystem, SMBFS successor)"
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depends on INET
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select NLS
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select SLOW_WORK
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help
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This is the client VFS module for the Common Internet File System
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(CIFS) protocol which is the successor to the Server Message Block
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@ -64,9 +64,6 @@ unsigned int multiuser_mount = 0;
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unsigned int extended_security = CIFSSEC_DEF;
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/* unsigned int ntlmv2_support = 0; */
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unsigned int sign_CIFS_PDUs = 1;
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extern struct task_struct *oplockThread; /* remove sparse warning */
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struct task_struct *oplockThread = NULL;
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/* extern struct task_struct * dnotifyThread; remove sparse warning */
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static const struct super_operations cifs_super_ops;
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unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
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module_param(CIFSMaxBufSize, int, 0);
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@ -973,89 +970,12 @@ cifs_destroy_mids(void)
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kmem_cache_destroy(cifs_oplock_cachep);
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}
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static int cifs_oplock_thread(void *dummyarg)
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{
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struct oplock_q_entry *oplock_item;
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struct cifsTconInfo *pTcon;
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struct inode *inode;
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__u16 netfid;
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int rc, waitrc = 0;
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set_freezable();
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do {
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if (try_to_freeze())
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continue;
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spin_lock(&cifs_oplock_lock);
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if (list_empty(&cifs_oplock_list)) {
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spin_unlock(&cifs_oplock_lock);
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set_current_state(TASK_INTERRUPTIBLE);
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schedule_timeout(39*HZ);
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} else {
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oplock_item = list_entry(cifs_oplock_list.next,
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struct oplock_q_entry, qhead);
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cFYI(1, ("found oplock item to write out"));
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pTcon = oplock_item->tcon;
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inode = oplock_item->pinode;
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netfid = oplock_item->netfid;
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spin_unlock(&cifs_oplock_lock);
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DeleteOplockQEntry(oplock_item);
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/* can not grab inode sem here since it would
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deadlock when oplock received on delete
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since vfs_unlink holds the i_mutex across
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the call */
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/* mutex_lock(&inode->i_mutex);*/
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if (S_ISREG(inode->i_mode)) {
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#ifdef CONFIG_CIFS_EXPERIMENTAL
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if (CIFS_I(inode)->clientCanCacheAll == 0)
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break_lease(inode, FMODE_READ);
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else if (CIFS_I(inode)->clientCanCacheRead == 0)
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break_lease(inode, FMODE_WRITE);
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#endif
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rc = filemap_fdatawrite(inode->i_mapping);
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if (CIFS_I(inode)->clientCanCacheRead == 0) {
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waitrc = filemap_fdatawait(
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inode->i_mapping);
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invalidate_remote_inode(inode);
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}
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if (rc == 0)
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rc = waitrc;
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} else
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rc = 0;
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/* mutex_unlock(&inode->i_mutex);*/
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if (rc)
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CIFS_I(inode)->write_behind_rc = rc;
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cFYI(1, ("Oplock flush inode %p rc %d",
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inode, rc));
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/* releasing stale oplock after recent reconnect
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of smb session using a now incorrect file
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handle is not a data integrity issue but do
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not bother sending an oplock release if session
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to server still is disconnected since oplock
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already released by the server in that case */
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if (!pTcon->need_reconnect) {
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rc = CIFSSMBLock(0, pTcon, netfid,
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0 /* len */ , 0 /* offset */, 0,
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0, LOCKING_ANDX_OPLOCK_RELEASE,
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false /* wait flag */);
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cFYI(1, ("Oplock release rc = %d", rc));
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}
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set_current_state(TASK_INTERRUPTIBLE);
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schedule_timeout(1); /* yield in case q were corrupt */
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}
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} while (!kthread_should_stop());
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return 0;
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}
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static int __init
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init_cifs(void)
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{
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int rc = 0;
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cifs_proc_init();
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INIT_LIST_HEAD(&cifs_tcp_ses_list);
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INIT_LIST_HEAD(&cifs_oplock_list);
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#ifdef CONFIG_CIFS_EXPERIMENTAL
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INIT_LIST_HEAD(&GlobalDnotifyReqList);
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INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
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@ -1084,7 +1004,6 @@ init_cifs(void)
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rwlock_init(&GlobalSMBSeslock);
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rwlock_init(&cifs_tcp_ses_lock);
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spin_lock_init(&GlobalMid_Lock);
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spin_lock_init(&cifs_oplock_lock);
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if (cifs_max_pending < 2) {
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cifs_max_pending = 2;
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@ -1119,18 +1038,15 @@ init_cifs(void)
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if (rc)
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goto out_unregister_key_type;
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#endif
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oplockThread = kthread_run(cifs_oplock_thread, NULL, "cifsoplockd");
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if (IS_ERR(oplockThread)) {
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rc = PTR_ERR(oplockThread);
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cERROR(1, ("error %d create oplock thread", rc));
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goto out_unregister_dfs_key_type;
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}
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rc = slow_work_register_user();
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if (rc)
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goto out_unregister_resolver_key;
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return 0;
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out_unregister_dfs_key_type:
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#ifdef CONFIG_CIFS_DFS_UPCALL
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out_unregister_resolver_key:
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unregister_key_type(&key_type_dns_resolver);
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#ifdef CONFIG_CIFS_DFS_UPCALL
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out_unregister_key_type:
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#endif
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#ifdef CONFIG_CIFS_UPCALL
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@ -1165,7 +1081,6 @@ exit_cifs(void)
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cifs_destroy_inodecache();
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cifs_destroy_mids();
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cifs_destroy_request_bufs();
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kthread_stop(oplockThread);
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}
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MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
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@ -18,6 +18,7 @@
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*/
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#include <linux/in.h>
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#include <linux/in6.h>
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#include <linux/slow-work.h>
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#include "cifs_fs_sb.h"
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#include "cifsacl.h"
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/*
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@ -346,14 +347,16 @@ struct cifsFileInfo {
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/* lock scope id (0 if none) */
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struct file *pfile; /* needed for writepage */
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struct inode *pInode; /* needed for oplock break */
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struct vfsmount *mnt;
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struct mutex lock_mutex;
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struct list_head llist; /* list of byte range locks we have. */
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bool closePend:1; /* file is marked to close */
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bool invalidHandle:1; /* file closed via session abend */
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bool messageMode:1; /* for pipes: message vs byte mode */
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bool oplock_break_cancelled:1;
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atomic_t count; /* reference count */
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struct mutex fh_mutex; /* prevents reopen race after dead ses*/
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struct cifs_search_info srch_inf;
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struct slow_work oplock_break; /* slow_work job for oplock breaks */
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};
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/* Take a reference on the file private data */
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@ -670,12 +673,6 @@ GLOBAL_EXTERN rwlock_t cifs_tcp_ses_lock;
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*/
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GLOBAL_EXTERN rwlock_t GlobalSMBSeslock;
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/* Global list of oplocks */
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GLOBAL_EXTERN struct list_head cifs_oplock_list;
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/* Protects the cifs_oplock_list */
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GLOBAL_EXTERN spinlock_t cifs_oplock_lock;
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/* Outstanding dir notify requests */
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GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
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/* DirNotify response queue */
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@ -726,3 +723,4 @@ GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
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GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
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GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
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extern const struct slow_work_ops cifs_oplock_break_ops;
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@ -86,17 +86,13 @@ extern int CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses,
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const int stage,
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const struct nls_table *nls_cp);
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extern __u16 GetNextMid(struct TCP_Server_Info *server);
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extern struct oplock_q_entry *AllocOplockQEntry(struct inode *, u16,
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struct cifsTconInfo *);
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extern void DeleteOplockQEntry(struct oplock_q_entry *);
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extern void DeleteTconOplockQEntries(struct cifsTconInfo *);
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extern struct timespec cifs_NTtimeToUnix(__le64 utc_nanoseconds_since_1601);
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extern u64 cifs_UnixTimeToNT(struct timespec);
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extern struct timespec cnvrtDosUnixTm(__le16 le_date, __le16 le_time,
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int offset);
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extern int cifs_posix_open(char *full_path, struct inode **pinode,
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struct super_block *sb, int mode, int oflags,
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struct vfsmount *mnt, int mode, int oflags,
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__u32 *poplock, __u16 *pnetfid, int xid);
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extern void cifs_unix_basic_to_fattr(struct cifs_fattr *fattr,
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FILE_UNIX_BASIC_INFO *info,
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@ -94,6 +94,7 @@ static void mark_open_files_invalid(struct cifsTconInfo *pTcon)
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list_for_each_safe(tmp, tmp1, &pTcon->openFileList) {
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open_file = list_entry(tmp, struct cifsFileInfo, tlist);
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open_file->invalidHandle = true;
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open_file->oplock_break_cancelled = true;
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}
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write_unlock(&GlobalSMBSeslock);
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/* BB Add call to invalidate_inodes(sb) for all superblocks mounted
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@ -1670,7 +1670,6 @@ cifs_put_tcon(struct cifsTconInfo *tcon)
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CIFSSMBTDis(xid, tcon);
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_FreeXid(xid);
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DeleteTconOplockQEntries(tcon);
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tconInfoFree(tcon);
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cifs_put_smb_ses(ses);
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}
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@ -24,6 +24,7 @@
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#include <linux/stat.h>
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#include <linux/slab.h>
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#include <linux/namei.h>
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#include <linux/mount.h>
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#include "cifsfs.h"
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#include "cifspdu.h"
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#include "cifsglob.h"
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@ -131,11 +132,12 @@ cifs_bp_rename_retry:
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static void
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cifs_fill_fileinfo(struct inode *newinode, __u16 fileHandle,
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struct cifsTconInfo *tcon, bool write_only)
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struct vfsmount *mnt, bool write_only)
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{
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int oplock = 0;
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struct cifsFileInfo *pCifsFile;
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struct cifsInodeInfo *pCifsInode;
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struct cifs_sb_info *cifs_sb = CIFS_SB(mnt->mnt_sb);
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pCifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
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@ -148,17 +150,19 @@ cifs_fill_fileinfo(struct inode *newinode, __u16 fileHandle,
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pCifsFile->netfid = fileHandle;
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pCifsFile->pid = current->tgid;
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pCifsFile->pInode = igrab(newinode);
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pCifsFile->mnt = mnt;
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pCifsFile->invalidHandle = false;
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pCifsFile->closePend = false;
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mutex_init(&pCifsFile->fh_mutex);
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mutex_init(&pCifsFile->lock_mutex);
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INIT_LIST_HEAD(&pCifsFile->llist);
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atomic_set(&pCifsFile->count, 1);
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slow_work_init(&pCifsFile->oplock_break, &cifs_oplock_break_ops);
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/* set the following in open now
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pCifsFile->pfile = file; */
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write_lock(&GlobalSMBSeslock);
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list_add(&pCifsFile->tlist, &tcon->openFileList);
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list_add(&pCifsFile->tlist, &cifs_sb->tcon->openFileList);
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pCifsInode = CIFS_I(newinode);
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if (pCifsInode) {
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/* if readable file instance put first in list*/
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@ -179,14 +183,14 @@ cifs_fill_fileinfo(struct inode *newinode, __u16 fileHandle,
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}
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int cifs_posix_open(char *full_path, struct inode **pinode,
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struct super_block *sb, int mode, int oflags,
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struct vfsmount *mnt, int mode, int oflags,
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__u32 *poplock, __u16 *pnetfid, int xid)
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{
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int rc;
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bool write_only = false;
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FILE_UNIX_BASIC_INFO *presp_data;
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__u32 posix_flags = 0;
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struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
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struct cifs_sb_info *cifs_sb = CIFS_SB(mnt->mnt_sb);
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struct cifs_fattr fattr;
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cFYI(1, ("posix open %s", full_path));
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@ -243,7 +247,7 @@ int cifs_posix_open(char *full_path, struct inode **pinode,
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/* get new inode and set it up */
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if (*pinode == NULL) {
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*pinode = cifs_iget(sb, &fattr);
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*pinode = cifs_iget(mnt->mnt_sb, &fattr);
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if (!*pinode) {
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rc = -ENOMEM;
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goto posix_open_ret;
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@ -252,7 +256,7 @@ int cifs_posix_open(char *full_path, struct inode **pinode,
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cifs_fattr_to_inode(*pinode, &fattr);
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}
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cifs_fill_fileinfo(*pinode, *pnetfid, cifs_sb->tcon, write_only);
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cifs_fill_fileinfo(*pinode, *pnetfid, mnt, write_only);
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posix_open_ret:
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kfree(presp_data);
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@ -322,7 +326,7 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
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if (tcon->unix_ext && (tcon->ses->capabilities & CAP_UNIX) &&
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(CIFS_UNIX_POSIX_PATH_OPS_CAP &
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le64_to_cpu(tcon->fsUnixInfo.Capability))) {
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rc = cifs_posix_open(full_path, &newinode, inode->i_sb,
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rc = cifs_posix_open(full_path, &newinode, nd->path.mnt,
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mode, oflags, &oplock, &fileHandle, xid);
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/* EIO could indicate that (posix open) operation is not
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supported, despite what server claimed in capability
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@ -469,8 +473,8 @@ cifs_create_set_dentry:
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/* mknod case - do not leave file open */
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CIFSSMBClose(xid, tcon, fileHandle);
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} else if (!(posix_create) && (newinode)) {
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cifs_fill_fileinfo(newinode, fileHandle,
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cifs_sb->tcon, write_only);
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cifs_fill_fileinfo(newinode, fileHandle, nd->path.mnt,
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write_only);
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}
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cifs_create_out:
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kfree(buf);
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@ -682,8 +686,7 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
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if (!(nd->flags & (LOOKUP_PARENT | LOOKUP_DIRECTORY)) &&
|
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(nd->flags & LOOKUP_OPEN) && !pTcon->broken_posix_open &&
|
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(nd->intent.open.flags & O_CREAT)) {
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rc = cifs_posix_open(full_path, &newInode,
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parent_dir_inode->i_sb,
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rc = cifs_posix_open(full_path, &newInode, nd->path.mnt,
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nd->intent.open.create_mode,
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nd->intent.open.flags, &oplock,
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&fileHandle, xid);
|
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|
|
|
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@ -30,6 +30,7 @@
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#include <linux/writeback.h>
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#include <linux/task_io_accounting_ops.h>
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#include <linux/delay.h>
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#include <linux/mount.h>
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#include <asm/div64.h>
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#include "cifsfs.h"
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#include "cifspdu.h"
|
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|
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@ -51,11 +52,13 @@ static inline struct cifsFileInfo *cifs_init_private(
|
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INIT_LIST_HEAD(&private_data->llist);
|
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private_data->pfile = file; /* needed for writepage */
|
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private_data->pInode = igrab(inode);
|
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private_data->mnt = file->f_path.mnt;
|
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private_data->invalidHandle = false;
|
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private_data->closePend = false;
|
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/* Initialize reference count to one. The private data is
|
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freed on the release of the last reference */
|
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atomic_set(&private_data->count, 1);
|
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slow_work_init(&private_data->oplock_break, &cifs_oplock_break_ops);
|
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|
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return private_data;
|
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}
|
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|
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@ -327,7 +330,7 @@ int cifs_open(struct inode *inode, struct file *file)
|
|||
le64_to_cpu(tcon->fsUnixInfo.Capability))) {
|
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int oflags = (int) cifs_posix_convert_flags(file->f_flags);
|
||||
/* can not refresh inode info since size could be stale */
|
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rc = cifs_posix_open(full_path, &inode, inode->i_sb,
|
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rc = cifs_posix_open(full_path, &inode, file->f_path.mnt,
|
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cifs_sb->mnt_file_mode /* ignored */,
|
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oflags, &oplock, &netfid, xid);
|
||||
if (rc == 0) {
|
||||
|
|
@ -547,7 +550,7 @@ reopen_error_exit:
|
|||
le64_to_cpu(tcon->fsUnixInfo.Capability))) {
|
||||
int oflags = (int) cifs_posix_convert_flags(file->f_flags);
|
||||
/* can not refresh inode info since size could be stale */
|
||||
rc = cifs_posix_open(full_path, NULL, inode->i_sb,
|
||||
rc = cifs_posix_open(full_path, NULL, file->f_path.mnt,
|
||||
cifs_sb->mnt_file_mode /* ignored */,
|
||||
oflags, &oplock, &netfid, xid);
|
||||
if (rc == 0) {
|
||||
|
|
@ -2312,6 +2315,73 @@ out:
|
|||
return rc;
|
||||
}
|
||||
|
||||
static void
|
||||
cifs_oplock_break(struct slow_work *work)
|
||||
{
|
||||
struct cifsFileInfo *cfile = container_of(work, struct cifsFileInfo,
|
||||
oplock_break);
|
||||
struct inode *inode = cfile->pInode;
|
||||
struct cifsInodeInfo *cinode = CIFS_I(inode);
|
||||
struct cifs_sb_info *cifs_sb = CIFS_SB(cfile->mnt->mnt_sb);
|
||||
int rc, waitrc = 0;
|
||||
|
||||
if (inode && S_ISREG(inode->i_mode)) {
|
||||
#ifdef CONFIG_CIFS_EXPERIMENTAL
|
||||
if (cinode->clientCanCacheAll == 0)
|
||||
break_lease(inode, FMODE_READ);
|
||||
else if (cinode->clientCanCacheRead == 0)
|
||||
break_lease(inode, FMODE_WRITE);
|
||||
#endif
|
||||
rc = filemap_fdatawrite(inode->i_mapping);
|
||||
if (cinode->clientCanCacheRead == 0) {
|
||||
waitrc = filemap_fdatawait(inode->i_mapping);
|
||||
invalidate_remote_inode(inode);
|
||||
}
|
||||
if (!rc)
|
||||
rc = waitrc;
|
||||
if (rc)
|
||||
cinode->write_behind_rc = rc;
|
||||
cFYI(1, ("Oplock flush inode %p rc %d", inode, rc));
|
||||
}
|
||||
|
||||
/*
|
||||
* releasing stale oplock after recent reconnect of smb session using
|
||||
* a now incorrect file handle is not a data integrity issue but do
|
||||
* 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) {
|
||||
rc = CIFSSMBLock(0, cifs_sb->tcon, cfile->netfid, 0, 0, 0, 0,
|
||||
LOCKING_ANDX_OPLOCK_RELEASE, false);
|
||||
cFYI(1, ("Oplock release rc = %d", rc));
|
||||
}
|
||||
}
|
||||
|
||||
static int
|
||||
cifs_oplock_break_get(struct slow_work *work)
|
||||
{
|
||||
struct cifsFileInfo *cfile = container_of(work, struct cifsFileInfo,
|
||||
oplock_break);
|
||||
mntget(cfile->mnt);
|
||||
cifsFileInfo_get(cfile);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
cifs_oplock_break_put(struct slow_work *work)
|
||||
{
|
||||
struct cifsFileInfo *cfile = container_of(work, struct cifsFileInfo,
|
||||
oplock_break);
|
||||
mntput(cfile->mnt);
|
||||
cifsFileInfo_put(cfile);
|
||||
}
|
||||
|
||||
const struct slow_work_ops cifs_oplock_break_ops = {
|
||||
.get_ref = cifs_oplock_break_get,
|
||||
.put_ref = cifs_oplock_break_put,
|
||||
.execute = cifs_oplock_break,
|
||||
};
|
||||
|
||||
const struct address_space_operations cifs_addr_ops = {
|
||||
.readpage = cifs_readpage,
|
||||
.readpages = cifs_readpages,
|
||||
|
|
|
|||
|
|
@ -32,7 +32,6 @@
|
|||
|
||||
extern mempool_t *cifs_sm_req_poolp;
|
||||
extern mempool_t *cifs_req_poolp;
|
||||
extern struct task_struct *oplockThread;
|
||||
|
||||
/* The xid serves as a useful identifier for each incoming vfs request,
|
||||
in a similar way to the mid which is useful to track each sent smb,
|
||||
|
|
@ -500,6 +499,7 @@ is_valid_oplock_break(struct smb_hdr *buf, struct TCP_Server_Info *srv)
|
|||
struct cifsTconInfo *tcon;
|
||||
struct cifsInodeInfo *pCifsInode;
|
||||
struct cifsFileInfo *netfile;
|
||||
int rc;
|
||||
|
||||
cFYI(1, ("Checking for oplock break or dnotify response"));
|
||||
if ((pSMB->hdr.Command == SMB_COM_NT_TRANSACT) &&
|
||||
|
|
@ -569,19 +569,30 @@ is_valid_oplock_break(struct smb_hdr *buf, struct TCP_Server_Info *srv)
|
|||
if (pSMB->Fid != netfile->netfid)
|
||||
continue;
|
||||
|
||||
read_unlock(&GlobalSMBSeslock);
|
||||
read_unlock(&cifs_tcp_ses_lock);
|
||||
/*
|
||||
* don't do anything if file is about to be
|
||||
* closed anyway.
|
||||
*/
|
||||
if (netfile->closePend) {
|
||||
read_unlock(&GlobalSMBSeslock);
|
||||
read_unlock(&cifs_tcp_ses_lock);
|
||||
return true;
|
||||
}
|
||||
|
||||
cFYI(1, ("file id match, oplock break"));
|
||||
pCifsInode = CIFS_I(netfile->pInode);
|
||||
pCifsInode->clientCanCacheAll = false;
|
||||
if (pSMB->OplockLevel == 0)
|
||||
pCifsInode->clientCanCacheRead = false;
|
||||
AllocOplockQEntry(netfile->pInode,
|
||||
netfile->netfid, tcon);
|
||||
cFYI(1, ("about to wake up oplock thread"));
|
||||
if (oplockThread)
|
||||
wake_up_process(oplockThread);
|
||||
|
||||
rc = slow_work_enqueue(&netfile->oplock_break);
|
||||
if (rc) {
|
||||
cERROR(1, ("failed to enqueue oplock "
|
||||
"break: %d\n", rc));
|
||||
} else {
|
||||
netfile->oplock_break_cancelled = false;
|
||||
}
|
||||
read_unlock(&GlobalSMBSeslock);
|
||||
read_unlock(&cifs_tcp_ses_lock);
|
||||
return true;
|
||||
}
|
||||
read_unlock(&GlobalSMBSeslock);
|
||||
|
|
|
|||
|
|
@ -103,56 +103,6 @@ DeleteMidQEntry(struct mid_q_entry *midEntry)
|
|||
mempool_free(midEntry, cifs_mid_poolp);
|
||||
}
|
||||
|
||||
struct oplock_q_entry *
|
||||
AllocOplockQEntry(struct inode *pinode, __u16 fid, struct cifsTconInfo *tcon)
|
||||
{
|
||||
struct oplock_q_entry *temp;
|
||||
if ((pinode == NULL) || (tcon == NULL)) {
|
||||
cERROR(1, ("Null parms passed to AllocOplockQEntry"));
|
||||
return NULL;
|
||||
}
|
||||
temp = (struct oplock_q_entry *) kmem_cache_alloc(cifs_oplock_cachep,
|
||||
GFP_KERNEL);
|
||||
if (temp == NULL)
|
||||
return temp;
|
||||
else {
|
||||
temp->pinode = pinode;
|
||||
temp->tcon = tcon;
|
||||
temp->netfid = fid;
|
||||
spin_lock(&cifs_oplock_lock);
|
||||
list_add_tail(&temp->qhead, &cifs_oplock_list);
|
||||
spin_unlock(&cifs_oplock_lock);
|
||||
}
|
||||
return temp;
|
||||
}
|
||||
|
||||
void DeleteOplockQEntry(struct oplock_q_entry *oplockEntry)
|
||||
{
|
||||
spin_lock(&cifs_oplock_lock);
|
||||
/* should we check if list empty first? */
|
||||
list_del(&oplockEntry->qhead);
|
||||
spin_unlock(&cifs_oplock_lock);
|
||||
kmem_cache_free(cifs_oplock_cachep, oplockEntry);
|
||||
}
|
||||
|
||||
|
||||
void DeleteTconOplockQEntries(struct cifsTconInfo *tcon)
|
||||
{
|
||||
struct oplock_q_entry *temp;
|
||||
|
||||
if (tcon == NULL)
|
||||
return;
|
||||
|
||||
spin_lock(&cifs_oplock_lock);
|
||||
list_for_each_entry(temp, &cifs_oplock_list, qhead) {
|
||||
if ((temp->tcon) && (temp->tcon == tcon)) {
|
||||
list_del(&temp->qhead);
|
||||
kmem_cache_free(cifs_oplock_cachep, temp);
|
||||
}
|
||||
}
|
||||
spin_unlock(&cifs_oplock_lock);
|
||||
}
|
||||
|
||||
static int
|
||||
smb_sendv(struct TCP_Server_Info *server, struct kvec *iov, int n_vec)
|
||||
{
|
||||
|
|
|
|||
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