From 50d805144c8769983ecd8ee81388aa1230d07648 Mon Sep 17 00:00:00 2001 From: Philip Homburg Date: Wed, 15 Mar 2006 13:37:20 +0000 Subject: [PATCH] dmap_io now returns a status. map_driver no longer calls dev_up. --- include/minix/dmap.h | 2 +- servers/fs/device.c | 29 ++++++++++++++++++----------- servers/fs/dmap.c | 27 ++++++++++++++++++--------- servers/fs/misc.c | 20 +++++++++++++++++++- servers/fs/proto.h | 6 +++--- 5 files changed, 59 insertions(+), 25 deletions(-) diff --git a/include/minix/dmap.h b/include/minix/dmap.h index 8b7d3121e..3edbb93d1 100644 --- a/include/minix/dmap.h +++ b/include/minix/dmap.h @@ -21,7 +21,7 @@ enum dev_style { STYLE_DEV, STYLE_NDEV, STYLE_TTY, STYLE_CLONE }; extern struct dmap { int _PROTOTYPE ((*dmap_opcl), (int, Dev_t, int, int) ); - void _PROTOTYPE ((*dmap_io), (int, message *) ); + int _PROTOTYPE ((*dmap_io), (int, message *) ); int dmap_driver; int dmap_flags; } dmap[]; diff --git a/servers/fs/device.c b/servers/fs/device.c index 8db6342e0..c6be9d0a5 100644 --- a/servers/fs/device.c +++ b/servers/fs/device.c @@ -350,7 +350,7 @@ PUBLIC int do_ioctl() /*===========================================================================* * gen_io * *===========================================================================*/ -PUBLIC void gen_io(task_nr, mess_ptr) +PUBLIC int gen_io(task_nr, mess_ptr) int task_nr; /* which task to call */ message *mess_ptr; /* pointer to message for task */ { @@ -378,7 +378,7 @@ message *mess_ptr; /* pointer to message for task */ * request. The caller will do the revive for the process. */ if (mess_ptr->m_type == CANCEL && local_m.REP_ENDPT == proc_e) { - return; + return OK; } /* Otherwise it should be a REVIVE. */ @@ -402,11 +402,12 @@ message *mess_ptr; /* pointer to message for task */ if (r != OK) { if (r == EDEADSRCDST || r == EDSTDIED || r == ESRCDIED) { printf("fs: dead driver %d\n", task_nr); - return; + dmap_unmap_by_endpt(task_nr); + return r; } if (r == ELOCKED) { printf("fs: ELOCKED talking to %d\n", task_nr); - return; + return r; } panic(__FILE__,"call_task: can't send/receive", r); } @@ -425,12 +426,14 @@ message *mess_ptr; /* pointer to message for task */ } r = receive(task_nr, mess_ptr); } + + return OK; } /*===========================================================================* * ctty_io * *===========================================================================*/ -PUBLIC void ctty_io(task_nr, mess_ptr) +PUBLIC int ctty_io(task_nr, mess_ptr) int task_nr; /* not used - for compatibility with dmap_t */ message *mess_ptr; /* pointer to message for task */ { @@ -451,17 +454,18 @@ message *mess_ptr; /* pointer to message for task */ if (dp->dmap_driver == NONE) { printf("FS: ctty_io: no driver for dev\n"); - return; + return EIO; } if(isokendpt(dp->dmap_driver, &dummyproc) != OK) { printf("FS: ctty_io: old driver %d\n", dp->dmap_driver); - return; + return EIO; } (*dp->dmap_io)(dp->dmap_driver, mess_ptr); } + return OK; } /*===========================================================================* @@ -480,11 +484,11 @@ int flags; /* mode bits and flags */ /*===========================================================================* * no_dev_io * *===========================================================================*/ -PUBLIC void no_dev_io(int proc, message *m) +PUBLIC int no_dev_io(int proc, message *m) { /* Called when doing i/o on a nonexistent device. */ printf("FS: I/O on unmapped device number\n"); - return; + return EIO; } /*===========================================================================* @@ -502,7 +506,7 @@ int flags; /* mode bits and flags */ * as a new network connection) that has been allocated within a task. */ struct dmap *dp; - int minor; + int r, minor; message dev_mess; /* Determine task dmap. */ @@ -527,7 +531,9 @@ int flags; /* mode bits and flags */ } /* Call the task. */ - (*dp->dmap_io)(dp->dmap_driver, &dev_mess); + r= (*dp->dmap_io)(dp->dmap_driver, &dev_mess); + if (r != OK) + return r; if (op == DEV_OPEN && dev_mess.REP_STATUS >= 0) { if (dev_mess.REP_STATUS != minor) { @@ -590,6 +596,7 @@ PUBLIC void dev_up(int maj) for(fp = filp; fp < &filp[NR_FILPS]; fp++) { struct inode *in; int minor; + if(fp->filp_count < 1 || !(in=fp->filp_ino)) continue; if(((in->i_zone[0] >> MAJOR) & BYTE) != maj) continue; if(!(in->i_mode & (I_BLOCK_SPECIAL|I_CHAR_SPECIAL))) continue; diff --git a/servers/fs/dmap.c b/servers/fs/dmap.c index cbafda903..de82c56ef 100644 --- a/servers/fs/dmap.c +++ b/servers/fs/dmap.c @@ -60,12 +60,28 @@ PRIVATE struct dmap init_dmap[] = { *===========================================================================*/ PUBLIC int do_devctl() { - int result; + int result, proc_nr_e, proc_nr_n; switch(m_in.ctl_req) { case DEV_MAP: + /* Check process number of new driver. */ + proc_nr_e= m_in.driver_nr; + if (isokendpt(proc_nr_e, &proc_nr_n) != OK) + return(EINVAL); + /* Try to update device mapping. */ - result = map_driver(m_in.dev_nr, m_in.driver_nr, m_in.dev_style); + result = map_driver(m_in.dev_nr, proc_nr_e, m_in.dev_style); + if (result == OK) + { + /* If a driver has completed its exec(), it can be announced to be + * up. + */ + if(fproc[proc_nr_n].fp_execced) { + dev_up(m_in.dev_nr); + } else { + dmap[m_in.dev_nr].dmap_flags |= DMAP_BABY; + } + } break; case DEV_UNMAP: result = map_driver(m_in.dev_nr, NONE, 0); @@ -129,13 +145,6 @@ int style; /* style of the device */ dp->dmap_io = gen_io; dp->dmap_driver = proc_nr_e; - /* If a driver has completed its exec(), it can be announced to be up. */ - if(fproc[proc_nr_n].fp_execced) { - dev_up(major); - } else { - dp->dmap_flags |= DMAP_BABY; - } - return(OK); } diff --git a/servers/fs/misc.c b/servers/fs/misc.c index 2597d3eec..3629f62ae 100644 --- a/servers/fs/misc.c +++ b/servers/fs/misc.c @@ -336,6 +336,9 @@ PUBLIC int do_fork() /* This child has not exec()ced yet. */ cp->fp_execced = 0; +#if 0 +printf("do_fork: child %d, slot %d\n", m_in.child_endpt, cp-fproc); +#endif /* Record the fact that both root and working dir have another user. */ dup_inode(cp->fp_rootdir); @@ -515,7 +518,7 @@ PUBLIC int do_svrctl() case FSSIGNON: { /* A server in user space calls in to manage a device. */ struct fssignon device; - int r, major; + int r, major, proc_nr_n; if (fp->fp_effuid != SU_UID && fp->fp_effuid != SERVERS_UID) return(EPERM); @@ -526,9 +529,24 @@ PUBLIC int do_svrctl() (phys_bytes) sizeof(device))) != OK) return(r); + if (isokendpt(who_e, &proc_nr_n) != OK) + return(EINVAL); + /* Try to update device mapping. */ major = (device.dev >> MAJOR) & BYTE; r=map_driver(major, who_e, device.style); + if (r == OK) + { + /* If a driver has completed its exec(), it can be announced + * to be up. + */ + if(fproc[proc_nr_n].fp_execced) { + dev_up(major); + } else { + dmap[major].dmap_flags |= DMAP_BABY; + } + } + return(r); } case FSDEVUNMAP: { diff --git a/servers/fs/proto.h b/servers/fs/proto.h index 5066c86b5..61c606b47 100644 --- a/servers/fs/proto.h +++ b/servers/fs/proto.h @@ -32,13 +32,13 @@ _PROTOTYPE( void dev_close, (Dev_t dev) ); _PROTOTYPE( int dev_io, (int op, Dev_t dev, int proc, void *buf, off_t pos, int bytes, int flags) ); _PROTOTYPE( int gen_opcl, (int op, Dev_t dev, int proc, int flags) ); -_PROTOTYPE( void gen_io, (int task_nr, message *mess_ptr) ); +_PROTOTYPE( int gen_io, (int task_nr, message *mess_ptr) ); _PROTOTYPE( int no_dev, (int op, Dev_t dev, int proc, int flags) ); -_PROTOTYPE( void no_dev_io, (int, message *) ); +_PROTOTYPE( int no_dev_io, (int, message *) ); _PROTOTYPE( int tty_opcl, (int op, Dev_t dev, int proc, int flags) ); _PROTOTYPE( int ctty_opcl, (int op, Dev_t dev, int proc, int flags) ); _PROTOTYPE( int clone_opcl, (int op, Dev_t dev, int proc, int flags) ); -_PROTOTYPE( void ctty_io, (int task_nr, message *mess_ptr) ); +_PROTOTYPE( int ctty_io, (int task_nr, message *mess_ptr) ); _PROTOTYPE( int do_ioctl, (void) ); _PROTOTYPE( int do_setsid, (void) ); _PROTOTYPE( void dev_status, (message *) ); -- 2.44.0