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minix/servers/vfs/proto.h
Ben Gras 41e9fedf87 Mostly bugfixes of bugs triggered by the test set. 
bugfixes:
 SYSTEM:
 . removed
        rc->p_priv->s_flags = 0;
   for the priv struct shared by all user processes in get_priv(). this
   should only be done once. doing a SYS_PRIV_USER in sys_privctl()
   caused the flags of all user processes to be reset, so they were no
   longer PREEMPTIBLE. this happened when RS executed a policy script.
   (this broke test1 in the test set)

 VFS/MFS:
 . chown can change the mode of a file, and chmod arguments are only
   part of the full file mode so the full filemode is slightly magic.
   changed these calls so that the final modes are returned to VFS, so
   that the vnode can be kept up-to-date.
   (this broke test11 in the test set)

 MFS:
 . lookup() checked for sizeof(string) instead of sizeof(user_path),
   truncating long path names
   (caught by test 23)
 . truncate functions neglected to update ctime
   (this broke test16)

 VFS:
 . corner case of an empty filename lookup caused fields of a request
   not to be filled in in the lookup functions, not making it clear
   that the lookup had failed, causing messages to garbage processes,
   causing strange failures.
   (caught by test 30)
 . trust v_size in vnode when doing reads or writes on non-special
   files, truncating i/o where necessary; this is necessary for pipes,
   as MFS can't tell when a pipe has been truncated without it being
   told explicitly each time.
   when the last reader/writer on a pipe closes, tell FS about
   the new size using truncate_vn().
   (this broke test 25, among others)
 . permission check for chdir() had disappeared; added a
   forbidden() call
   (caught by test 23)

new code, shouldn't change anything:
 . introduced RTS_SET, RTS_UNSET, and RTS_ISSET macro's, and their
   LOCK variants. These macros set and clear the p_rts_flags field,
   causing a lot of duplicated logic like

       old_flags = rp->p_rts_flags;            /* save value of the flags */
       rp->p_rts_flags &= ~NO_PRIV;
       if (old_flags != 0 && rp->p_rts_flags == 0) lock_enqueue(rp);

   to change into the simpler

       RTS_LOCK_UNSET(rp, NO_PRIV);

   so the macros take care of calling dequeue() and enqueue() (or lock_*()),
   as the case may be). This makes the code a bit more readable and a
   bit less fragile.
 . removed return code from do_clocktick in CLOCK as it currently
   never replies
 . removed some debug code from VFS
 . fixed grant debug message in device.c
 
preemptive checks, tests, changes:
 . added return code checks of receive() to SYSTEM and CLOCK
 . O_TRUNC should never arrive at MFS (added sanity check and removed
   O_TRUNC code)
 . user_path declared with PATH_MAX+1 to let it be null-terminated
 . checks in MFS to see if strings passed by VFS are null-terminated
 
 IS:
 . static irq name table thrown out
2007-02-01 17:50:02 +00:00

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/* Function prototypes. */
#include "timers.h"
#include "request.h"
/* Structs used in prototypes must be declared as such first. */
struct filp;
struct fproc;
struct vmnt;
struct vnode;
/* device.c */
_PROTOTYPE( int dev_open, (Dev_t dev, int proc, int flags) );
_PROTOTYPE( void dev_close, (Dev_t dev) );
_PROTOTYPE( int dev_bio, (int op, Dev_t dev, int proc, void *buf,
off_t pos, int bytes) );
_PROTOTYPE( int dev_io, (int op, Dev_t dev, int proc, void *buf,
u64_t pos, int bytes, int flags) );
_PROTOTYPE( int gen_opcl, (int op, Dev_t dev, int proc, int flags) );
_PROTOTYPE( int gen_io, (int task_nr, message *mess_ptr) );
_PROTOTYPE( int no_dev, (int op, Dev_t dev, int proc, int flags) );
_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( int ctty_io, (int task_nr, message *mess_ptr) );
_PROTOTYPE( int do_ioctl, (void) );
_PROTOTYPE( void pm_setsid, (int proc_e) );
_PROTOTYPE( void dev_status, (message *) );
_PROTOTYPE( void dev_up, (int major) );
/* dmap.c */
_PROTOTYPE( int do_devctl, (void) );
_PROTOTYPE( int fs_devctl, (int req, int dev, int proc_nr_e, int style,
int force) );
_PROTOTYPE( void build_dmap, (void) );
_PROTOTYPE( int map_driver, (int major, int proc_nr, int dev_style,
int force) );
_PROTOTYPE( int dmap_driver_match, (int proc, int major) );
_PROTOTYPE( void dmap_unmap_by_endpt, (int proc_nr) );
_PROTOTYPE( void dmap_endpt_up, (int proc_nr) );
/* exec.c */
_PROTOTYPE( int pm_exec, (int proc_e, char *path, vir_bytes path_len,
char *frame, vir_bytes frame_len) );
/* filedes.c */
_PROTOTYPE( struct filp *find_filp, (struct vnode *vp, mode_t bits) );
_PROTOTYPE( int get_fd, (int start, mode_t bits, int *k,
struct filp **fpt) );
_PROTOTYPE( struct filp *get_filp, (int fild) );
_PROTOTYPE( struct filp *get_filp2, (struct fproc *rfp, int fild) );
_PROTOTYPE( int inval_filp, (struct filp *) );
/* link.c */
_PROTOTYPE( int do_link, (void) );
_PROTOTYPE( int do_unlink, (void) );
_PROTOTYPE( int do_rename, (void) );
_PROTOTYPE( int do_truncate, (void) );
_PROTOTYPE( int do_ftruncate, (void) );
_PROTOTYPE( int truncate_vn, (struct vnode *vp, off_t newsize) );
/* lock.c */
_PROTOTYPE( int lock_op, (struct filp *f, int req) );
_PROTOTYPE( void lock_revive, (void) );
/* main.c */
_PROTOTYPE( int main, (void) );
_PROTOTYPE( void reply, (int whom, int result) );
/* misc.c */
_PROTOTYPE( int do_dup, (void) );
_PROTOTYPE( void pm_exit, (int proc) );
_PROTOTYPE( int do_fcntl, (void) );
_PROTOTYPE( void pm_fork, (int pproc, int cproc, int cpid) );
_PROTOTYPE( void pm_setgid, (int proc_e, int egid, int rgid) );
_PROTOTYPE( void pm_setuid, (int proc_e, int euid, int ruid) );
_PROTOTYPE( int do_sync, (void) );
_PROTOTYPE( int do_fsync, (void) );
_PROTOTYPE( void pm_reboot, (void) );
_PROTOTYPE( int do_svrctl, (void) );
_PROTOTYPE( int do_getsysinfo, (void) );
_PROTOTYPE( int pm_dumpcore, (int proc_e, struct mem_map *seg_ptr) );
/* mount.c */
_PROTOTYPE( int do_fslogin, (void) );
_PROTOTYPE( int do_mount, (void) );
_PROTOTYPE( int do_umount, (void) );
_PROTOTYPE( int unmount, (Dev_t dev) );
/* open.c */
_PROTOTYPE( int do_close, (void) );
_PROTOTYPE( int close_fd, (struct fproc *rfp, int fd_nr) );
_PROTOTYPE( int do_creat, (void) );
_PROTOTYPE( int do_lseek, (void) );
_PROTOTYPE( int do_llseek, (void) );
_PROTOTYPE( int do_mknod, (void) );
_PROTOTYPE( int do_mkdir, (void) );
_PROTOTYPE( int do_open, (void) );
_PROTOTYPE( int do_slink, (void) );
/* path.c */
_PROTOTYPE( int lookup, (lookup_req_t *request, node_details_t *node) );
_PROTOTYPE( int lookup_vp, (lookup_req_t *request, struct vnode **vpp) );
_PROTOTYPE( int Xlookup_vp, (lookup_req_t *request, struct vnode **vpp,
char **pathrem) );
/* pipe.c */
_PROTOTYPE( int do_pipe, (void) );
_PROTOTYPE( int do_unpause, (void) );
_PROTOTYPE( int unpause, (int proc_nr_e) );
_PROTOTYPE( int pipe_check, (struct vnode *vp, int rw_flag,
int oflags, int bytes, u64_t position, int *canwrite, int notouch));
_PROTOTYPE( void release, (struct vnode *vp, int call_nr, int count) );
_PROTOTYPE( void revive, (int proc_nr, int bytes) );
_PROTOTYPE( void suspend, (int task) );
_PROTOTYPE( int select_request_pipe, (struct filp *f, int *ops, int bl) );
_PROTOTYPE( int select_cancel_pipe, (struct filp *f) );
_PROTOTYPE( int select_match_pipe, (struct filp *f) );
_PROTOTYPE( void unsuspend_by_endpt, (int) );
/* protect.c */
_PROTOTYPE( int do_access, (void) );
_PROTOTYPE( int do_chmod, (void) );
_PROTOTYPE( int do_chown, (void) );
_PROTOTYPE( int do_umask, (void) );
_PROTOTYPE( int forbidden, (struct vnode *vp, mode_t access_desired) );
_PROTOTYPE( int read_only, (struct vnode *vp) );
/* read.c */
_PROTOTYPE( int do_read, (void) );
_PROTOTYPE( int do_getdents, (void) );
_PROTOTYPE( int read_write, (int rw_flag) );
/* request.c */
#define req_getnode(req, res) req_getnode_f(__FILE__, __LINE__, (req), (res))
_PROTOTYPE( int req_getnode_f, (char *file, int line, node_req_t *req, node_details_t *res) );
_PROTOTYPE( int req_putnode, (int fs_e, ino_t inode_nr, int count) );
_PROTOTYPE( int req_open, (open_req_t *req, node_details_t *res) );
_PROTOTYPE( int req_create, (int fs_e, ino_t inode_nr, int omode,
int uid, int gid, char *path, node_details_t *res) );
_PROTOTYPE( int req_readwrite, (readwrite_req_t *req,
readwrite_res_t *res) );
_PROTOTYPE( int req_pipe, (pipe_req_t *req, node_details_t *res) );
_PROTOTYPE( int req_clone_opcl, (clone_opcl_req_t *req,
node_details_t *res) );
_PROTOTYPE( int req_ftrunc, (ftrunc_req_t *req) );
_PROTOTYPE( int req_chown, (chown_req_t *req, int *mode) );
_PROTOTYPE( int req_chmod, (chmod_req_t *req, int *mode) );
_PROTOTYPE( int req_access, (access_req_t *req) );
_PROTOTYPE( int req_mknod, (mknod_req_t *req) );
_PROTOTYPE( int req_mkdir, (mkdir_req_t *req) );
_PROTOTYPE( int req_inhibread, (node_req_t *req) );
_PROTOTYPE( int req_stat, (int fs_e, ino_t inode_nr, int who_e,
char *buf, int pos) );
_PROTOTYPE( int req_fstatfs, (int fs_e, ino_t inode_nr, int who_e,
char *buf) );
_PROTOTYPE( int req_unlink, (unlink_req_t *req) );
_PROTOTYPE( int req_rmdir, (unlink_req_t *req) );
_PROTOTYPE( int req_utime, (utime_req_t *req) );
_PROTOTYPE( int req_stime, (endpoint_t fs_e, time_t boottime) );
_PROTOTYPE( int req_sync, (endpoint_t fs_e) );
_PROTOTYPE( int req_link, (link_req_t *req) );
_PROTOTYPE( int req_slink, (slink_req_t *req) );
_PROTOTYPE( int req_rdlink, (rdlink_req_t *req) );
_PROTOTYPE( int req_rename, (rename_req_t *req) );
_PROTOTYPE( int req_mountpoint, (mountpoint_req_t *req,
node_details_t *res) );
_PROTOTYPE( int req_readsuper, (readsuper_req_t *req,
readsuper_res_t *res) );
_PROTOTYPE( int req_unmount, (endpoint_t fs_e) );
_PROTOTYPE( int req_trunc, (trunc_req_t *req) );
_PROTOTYPE( int req_lookup, (lookup_req_t *req, lookup_res_t *res) );
_PROTOTYPE( int req_newdriver, (endpoint_t fs_e, Dev_t dev,
endpoint_t driver_e) );
_PROTOTYPE( int req_breadwrite, (breadwrite_req_t *req,
readwrite_res_t *res) );
_PROTOTYPE( int req_getdents, (endpoint_t fs_e, ino_t inode_nr,
off_t pos, cp_grant_id_t gid, size_t size, off_t *pos_change) );
_PROTOTYPE( int req_flush, (endpoint_t fs_e, Dev_t) );
/* stadir.c */
_PROTOTYPE( int do_chdir, (void) );
_PROTOTYPE( int do_fchdir, (void) );
_PROTOTYPE( int do_chroot, (void) );
_PROTOTYPE( int do_fstat, (void) );
_PROTOTYPE( int do_stat, (void) );
_PROTOTYPE( int do_fstatfs, (void) );
_PROTOTYPE( int do_rdlink, (void) );
_PROTOTYPE( int do_lstat, (void) );
/* time.c */
_PROTOTYPE( int do_stime, (void) );
_PROTOTYPE( int do_utime, (void) );
/* utility.c */
_PROTOTYPE( time_t clock_time, (void) );
_PROTOTYPE( unsigned conv2, (int norm, int w) );
_PROTOTYPE( long conv4, (int norm, long x) );
_PROTOTYPE( int fetch_name, (char *path, int len, int flag) );
_PROTOTYPE( int no_sys, (void) );
_PROTOTYPE( int isokendpt_f, (char *f, int l, int e, int *p, int ft));
_PROTOTYPE( void panic, (char *who, char *mess, int num) );
#define okendpt(e, p) isokendpt_f(__FILE__, __LINE__, (e), (p), 1)
#define isokendpt(e, p) isokendpt_f(__FILE__, __LINE__, (e), (p), 0)
/* vmnt.c */
_PROTOTYPE( struct vmnt *get_free_vmnt, (short *index) );
_PROTOTYPE( struct vmnt *find_vmnt, (int fs_e) );
/* vnode.c */
_PROTOTYPE( struct vnode *get_free_vnode, (char *file, int line) );
_PROTOTYPE( struct vnode *find_vnode, (int fs_e, int numb) );
_PROTOTYPE( void dup_vnode, (struct vnode *vp) );
_PROTOTYPE( void put_vnode, (struct vnode *vp) );
_PROTOTYPE( void vnode_clean_refs, (struct vnode *vp) );
_PROTOTYPE( struct vnode *get_vnode, (int fs_e, int inode_nr) );
_PROTOTYPE( struct vnode *get_vnode_x, (int fs_e, int inode_nr) );
#if 0
_PROTOTYPE( void mark_vn, (struct vnode *vp, char *file, int line) );
_PROTOTYPE( int check_vrefs, (void) );
#endif
/* write.c */
_PROTOTYPE( int do_write, (void) );
/* select.c */
_PROTOTYPE( int do_select, (void) );
_PROTOTYPE( int select_callback, (struct filp *, int ops) );
_PROTOTYPE( void select_forget, (int fproc) );
_PROTOTYPE( void select_timeout_check, (timer_t *) );
_PROTOTYPE( void init_select, (void) );
_PROTOTYPE( void select_unsuspend_by_endpt, (int proc) );
_PROTOTYPE( int select_notified, (int major, int minor, int ops) );
/* timers.c */
_PROTOTYPE( void fs_set_timer, (timer_t *tp, int delta,
tmr_func_t watchdog, int arg) );
_PROTOTYPE( void fs_expire_timers, (clock_t now) );
_PROTOTYPE( void fs_cancel_timer, (timer_t *tp) );
_PROTOTYPE( void fs_init_timer, (timer_t *tp) );
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