xnu-2782.30.5.tar.gz

[apple/xnu.git] / bsd / sys / user.h

diff --git a/bsd/sys/user.h b/bsd/sys/user.h
index 771563663a6839003193b7d35e4e7485c45e6c34..8fc6c578ac2b2fda11908dcbe6851f0b56a211cb 100644 (file)
--- a/bsd/sys/user.h
+++ b/bsd/sys/user.h
@@ -96,6 +96,26 @@ struct vfs_context {
        kauth_cred_t    vc_ucred;               /* per thread credential */
 };
 
+/*
+ * struct representing a document "tombstone" that's recorded
+ * when a thread manipulates files marked with a document-id.
+ * if the thread recreates the same item, this tombstone is
+ * used to preserve the document_id on the new file.
+ *
+ * It is a separate structure because of its size - we want to
+ * allocate it on demand instead of just stuffing it into the
+ * uthread structure.
+ */
+struct doc_tombstone {
+       struct vnode     *t_lastop_parent;
+       struct vnode     *t_lastop_item;
+       uint32_t          t_lastop_parent_vid;
+       uint32_t          t_lastop_item_vid;
+       uint64_t          t_lastop_fileid;
+       uint64_t          t_lastop_document_id;
+       unsigned char     t_lastop_filename[NAME_MAX+1];
+};
+
 #endif /* !__LP64 || XNU_KERNEL_PRIVATE */
 
 #ifdef BSD_KERNEL_PRIVATE
@@ -112,8 +132,8 @@ struct label;               /* MAC label dummy struct */
 struct uthread {
        /* syscall parameters, results and catches */
        u_int64_t uu_arg[8]; /* arguments to current system call */
-       int     *uu_ap;                 /* pointer to arglist */
     int uu_rval[2];
+       unsigned int syscall_code; /* current syscall code */
 
        /* thread exception handling */
        mach_exception_code_t uu_code;  /* ``code'' to trap */
@@ -125,9 +145,9 @@ struct uthread {
                struct _select_data {
                        u_int64_t abstime;
                        char * wql;
-                       int poll;
-                       int error;
                        int count;
+                       struct select_nocancel_args *args;      /* original syscall arguments */
+                       int32_t *retval;                                        /* place to store return val */
                } ss_select_data;
                struct _kqueue_scan {
                        kevent_callback_t call; /* per-event callback */
@@ -151,12 +171,22 @@ struct uthread {
                } uu_kauth;
 
                struct ksyn_waitq_element  uu_kwe;              /* user for pthread synch */
+
+               struct _waitid_data {
+                       struct waitid_nocancel_args *args;      /* original syscall arguments */
+                       int32_t *retval;                        /* place to store return val */
+               } uu_waitid_data;
+
+               struct _wait4_data {
+                       struct wait4_nocancel_args *args;       /* original syscall arguments */
+                       int32_t *retval;                        /* place to store return val */
+               } uu_wait4_data;
        } uu_kevent;
 
+       /* Persistent memory allocations across system calls */
        struct _select {
                        u_int32_t       *ibits, *obits; /* bits to select on */
                        uint    nbytes; /* number of bytes in ibits and obits */
-                       struct _select_data *data;
        } uu_select;                    /* saved state for select() */
 
   /* internal support for continuation framework */
@@ -196,7 +226,6 @@ struct uthread {
        struct kern_sigaltstack uu_sigstk;
         vnode_t                uu_vreclaims;
        vnode_t         uu_cdir;                /* per thread CWD */
-       int             uu_notrigger;           /* XXX - flag for autofs */
        int             uu_dupfd;               /* fd in fdesc_open/dupfdopen */
         int            uu_defer_reclaims;
 
@@ -249,6 +278,9 @@ struct uthread {
        void *          uu_threadlist;
        char *          pth_name;
        struct label *  uu_label;       /* MAC label */
+
+       /* Document Tracking struct used to track a "tombstone" for a document */
+       struct doc_tombstone *t_tombstone;
 };
 
 typedef struct uthread * uthread_t;