[PATCH] fuse: fix dereferencing dentry parent

[powerpc.git] / fs / dlm / dlm_internal.h

diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h
index c329902..1e5cd67 100644 (file)
--- a/fs/dlm/dlm_internal.h
+++ b/fs/dlm/dlm_internal.h
@@ -35,6 +35,7 @@
 #include <linux/kref.h>
 #include <linux/kernel.h>
 #include <linux/jhash.h>
+#include <linux/miscdevice.h>
 #include <linux/mutex.h>
 #include <asm/semaphore.h>
 #include <asm/uaccess.h>
@@ -68,6 +69,7 @@ struct dlm_mhandle;
 #define log_error(ls, fmt, args...) \
        printk(KERN_ERR "dlm: %s: " fmt "\n", (ls)->ls_name , ##args)
 
+#define DLM_LOG_DEBUG
 #ifdef DLM_LOG_DEBUG
 #define log_debug(ls, fmt, args...) log_error(ls, fmt, ##args)
 #else
@@ -89,6 +91,8 @@ struct dlm_mhandle;
   } \
 }
 
+#define DLM_FAKE_USER_AST ERR_PTR(-EINVAL)
+
 
 struct dlm_direntry {
        struct list_head        list;
@@ -204,6 +208,9 @@ struct dlm_args {
 
 #define DLM_IFL_MSTCPY         0x00010000
 #define DLM_IFL_RESEND         0x00020000
+#define DLM_IFL_DEAD           0x00040000
+#define DLM_IFL_USER           0x00000001
+#define DLM_IFL_ORPHAN         0x00000002
 
 struct dlm_lkb {
        struct dlm_rsb          *lkb_resource;  /* the rsb */
@@ -231,6 +238,7 @@ struct dlm_lkb {
        struct list_head        lkb_rsb_lookup; /* waiting for rsb lookup */
        struct list_head        lkb_wait_reply; /* waiting for remote reply */
        struct list_head        lkb_astqueue;   /* need ast to be sent */
+       struct list_head        lkb_ownqueue;   /* list of locks for a process */
 
        char                    *lkb_lvbptr;
        struct dlm_lksb         *lkb_lksb;      /* caller's status block */
@@ -280,6 +288,7 @@ enum rsb_flags {
        RSB_NEW_MASTER,
        RSB_NEW_MASTER2,
        RSB_RECOVER_CONVERT,
+       RSB_LOCKS_PURGED,
 };
 
 static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag)
@@ -408,6 +417,7 @@ struct rcom_lock {
 
 struct dlm_ls {
        struct list_head        ls_list;        /* list of lockspaces */
+       dlm_lockspace_t         *ls_local_handle;
        uint32_t                ls_global_id;   /* global unique lockspace ID */
        uint32_t                ls_exflags;
        int                     ls_lvblen;
@@ -438,11 +448,14 @@ struct dlm_ls {
        struct dlm_lkb          ls_stub_lkb;    /* for returning errors */
        struct dlm_message      ls_stub_ms;     /* for faking a reply */
 
-       struct dentry           *ls_debug_dentry; /* debugfs */
+       struct dentry           *ls_debug_rsb_dentry; /* debugfs */
+       struct dentry           *ls_debug_waiters_dentry; /* debugfs */
 
        wait_queue_head_t       ls_uevent_wait; /* user part of join/leave */
        int                     ls_uevent_result;
 
+       struct miscdevice       ls_device;
+
        /* recovery related */
 
        struct timer_list       ls_timer;
@@ -456,10 +469,13 @@ struct dlm_ls {
        struct list_head        ls_requestqueue;/* queue remote requests */
        struct mutex            ls_requestqueue_mutex;
        char                    *ls_recover_buf;
+       int                     ls_recover_nodeid; /* for debugging */
+       uint64_t                ls_rcom_seq;
        struct list_head        ls_recover_list;
        spinlock_t              ls_recover_list_lock;
        int                     ls_recover_list_count;
        wait_queue_head_t       ls_wait_general;
+       struct mutex            ls_clear_proc_locks;
 
        struct list_head        ls_root_list;   /* root resources */
        struct rw_semaphore     ls_root_sem;    /* protect root_list */
@@ -474,6 +490,40 @@ struct dlm_ls {
 #define LSFL_RCOM_READY                3
 #define LSFL_UEVENT_WAIT       4
 
+/* much of this is just saving user space pointers associated with the
+   lock that we pass back to the user lib with an ast */
+
+struct dlm_user_args {
+       struct dlm_user_proc    *proc; /* each process that opens the lockspace
+                                         device has private data
+                                         (dlm_user_proc) on the struct file,
+                                         the process's locks point back to it*/
+       struct dlm_lksb         lksb;
+       int                     old_mode;
+       int                     update_user_lvb;
+       struct dlm_lksb __user  *user_lksb;
+       void __user             *castparam;
+       void __user             *castaddr;
+       void __user             *bastparam;
+       void __user             *bastaddr;
+};
+
+#define DLM_PROC_FLAGS_CLOSING 1
+#define DLM_PROC_FLAGS_COMPAT  2
+
+/* locks list is kept so we can remove all a process's locks when it
+   exits (or orphan those that are persistent) */
+
+struct dlm_user_proc {
+       dlm_lockspace_t         *lockspace;
+       unsigned long           flags; /* DLM_PROC_FLAGS */
+       struct list_head        asts;
+       spinlock_t              asts_spin;
+       struct list_head        locks;
+       spinlock_t              locks_spin;
+       wait_queue_head_t       wait;
+};
+
 static inline int dlm_locking_stopped(struct dlm_ls *ls)
 {
        return !test_bit(LSFL_RUNNING, &ls->ls_flags);