2006-10-25 15:40:36 +02:00
|
|
|
/* This file contains the procedures for creating, opening, closing, and
|
|
|
|
* seeking on files.
|
|
|
|
*
|
|
|
|
* The entry points into this file are
|
|
|
|
* do_creat: perform the CREAT system call
|
|
|
|
* do_open: perform the OPEN system call
|
|
|
|
* do_mknod: perform the MKNOD system call
|
|
|
|
* do_mkdir: perform the MKDIR system call
|
|
|
|
* do_close: perform the CLOSE system call
|
|
|
|
* do_lseek: perform the LSEEK system call
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "fs.h"
|
|
|
|
#include <sys/stat.h>
|
|
|
|
#include <fcntl.h>
|
|
|
|
#include <string.h>
|
|
|
|
#include <unistd.h>
|
|
|
|
#include <minix/callnr.h>
|
|
|
|
#include <minix/com.h>
|
2006-11-27 15:21:43 +01:00
|
|
|
#include <minix/u64.h>
|
2006-10-25 15:40:36 +02:00
|
|
|
#include "file.h"
|
|
|
|
#include "fproc.h"
|
|
|
|
#include "lock.h"
|
|
|
|
#include "param.h"
|
|
|
|
#include <dirent.h>
|
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 18:50:02 +01:00
|
|
|
#include <assert.h>
|
2006-10-25 15:40:36 +02:00
|
|
|
#include <minix/vfsif.h>
|
|
|
|
#include "vnode.h"
|
|
|
|
#include "vmnt.h"
|
|
|
|
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
PRIVATE char mode_map[] = {R_BIT, W_BIT, R_BIT|W_BIT, 0};
|
|
|
|
|
2006-10-25 15:40:36 +02:00
|
|
|
FORWARD _PROTOTYPE( int common_open, (int oflags, mode_t omode) );
|
2010-01-21 10:32:15 +01:00
|
|
|
FORWARD _PROTOTYPE( struct vnode *new_node, (int oflags, mode_t bits) );
|
2006-10-25 15:40:36 +02:00
|
|
|
FORWARD _PROTOTYPE( int pipe_open, (struct vnode *vp,mode_t bits,int oflags));
|
|
|
|
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
|
2006-10-25 15:40:36 +02:00
|
|
|
/*===========================================================================*
|
|
|
|
* do_creat *
|
|
|
|
*===========================================================================*/
|
|
|
|
PUBLIC int do_creat()
|
|
|
|
{
|
|
|
|
/* Perform the creat(name, mode) system call. */
|
|
|
|
int r;
|
|
|
|
|
|
|
|
if (fetch_name(m_in.name, m_in.name_length, M3) != OK) return(err_code);
|
|
|
|
r = common_open(O_WRONLY | O_CREAT | O_TRUNC, (mode_t) m_in.mode);
|
|
|
|
return(r);
|
|
|
|
}
|
|
|
|
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
|
2006-10-25 15:40:36 +02:00
|
|
|
/*===========================================================================*
|
|
|
|
* do_open *
|
|
|
|
*===========================================================================*/
|
|
|
|
PUBLIC int do_open()
|
|
|
|
{
|
|
|
|
/* Perform the open(name, flags,...) system call. */
|
|
|
|
int create_mode = 0; /* is really mode_t but this gives problems */
|
|
|
|
int r;
|
|
|
|
|
|
|
|
/* If O_CREAT is set, open has three parameters, otherwise two. */
|
|
|
|
if (m_in.mode & O_CREAT) {
|
|
|
|
create_mode = m_in.c_mode;
|
|
|
|
r = fetch_name(m_in.c_name, m_in.name1_length, M1);
|
|
|
|
} else {
|
|
|
|
r = fetch_name(m_in.name, m_in.name_length, M3);
|
|
|
|
}
|
|
|
|
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
if (r != OK) return(err_code); /* name was bad */
|
2006-10-25 15:40:36 +02:00
|
|
|
r = common_open(m_in.mode, create_mode);
|
|
|
|
return(r);
|
|
|
|
}
|
|
|
|
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
|
2006-10-25 15:40:36 +02:00
|
|
|
/*===========================================================================*
|
|
|
|
* common_open *
|
|
|
|
*===========================================================================*/
|
|
|
|
PRIVATE int common_open(register int oflags, mode_t omode)
|
|
|
|
{
|
|
|
|
/* Common code from do_creat and do_open. */
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
int b, r, exist = TRUE;
|
|
|
|
dev_t dev;
|
2006-10-25 15:40:36 +02:00
|
|
|
mode_t bits;
|
|
|
|
struct filp *fil_ptr, *filp2;
|
2007-08-07 14:52:47 +02:00
|
|
|
struct vnode *vp;
|
2006-10-25 15:40:36 +02:00
|
|
|
struct vmnt *vmp;
|
2007-08-07 14:52:47 +02:00
|
|
|
struct dmap *dp;
|
2006-10-25 15:40:36 +02:00
|
|
|
|
|
|
|
/* Remap the bottom two bits of oflags. */
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
bits = (mode_t) mode_map[oflags & O_ACCMODE];
|
|
|
|
if (!bits) return(EINVAL);
|
2006-10-25 15:40:36 +02:00
|
|
|
|
|
|
|
/* See if file descriptor and filp slots are available. */
|
|
|
|
if ((r = get_fd(0, bits, &m_in.fd, &fil_ptr)) != OK) return(r);
|
|
|
|
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
/* If O_CREATE is set, try to make the file. */
|
2006-10-25 15:40:36 +02:00
|
|
|
if (oflags & O_CREAT) {
|
|
|
|
omode = I_REGULAR | (omode & ALL_MODES & fp->fp_umask);
|
2010-01-21 10:32:15 +01:00
|
|
|
vp = new_node(oflags, omode);
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
r = err_code;
|
|
|
|
if (r == OK) exist = FALSE; /* We just created the file */
|
|
|
|
else if (r != EEXIST) return(r); /* other error */
|
|
|
|
else exist = !(oflags & O_EXCL); /* file exists, if the O_EXCL
|
|
|
|
flag is set this is an error */
|
|
|
|
} else {
|
|
|
|
/* Scan path name */
|
|
|
|
if ((vp = eat_path(PATH_NOFLAGS)) == NIL_VNODE) return(err_code);
|
2007-01-05 17:36:55 +01:00
|
|
|
}
|
|
|
|
|
2006-10-25 15:40:36 +02:00
|
|
|
/* Claim the file descriptor and filp slot and fill them in. */
|
|
|
|
fp->fp_filp[m_in.fd] = fil_ptr;
|
|
|
|
FD_SET(m_in.fd, &fp->fp_filp_inuse);
|
|
|
|
fil_ptr->filp_count = 1;
|
|
|
|
fil_ptr->filp_vno = vp;
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
fil_ptr->filp_flags = oflags;
|
|
|
|
|
2010-01-21 10:32:15 +01:00
|
|
|
/* Only do the normal open code if we didn't just create the file. */
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
if(exist) {
|
|
|
|
/* Check protections. */
|
|
|
|
if ((r = forbidden(vp, bits)) == OK) {
|
|
|
|
/* Opening reg. files, directories, and special files differ */
|
|
|
|
switch (vp->v_mode & I_TYPE) {
|
|
|
|
case I_REGULAR:
|
|
|
|
/* Truncate regular file if O_TRUNC. */
|
|
|
|
if (oflags & O_TRUNC) {
|
|
|
|
if ((r = forbidden(vp, W_BIT)) != OK)
|
|
|
|
break;
|
|
|
|
truncate_vnode(vp, 0);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case I_DIRECTORY:
|
|
|
|
/* Directories may be read but not written. */
|
|
|
|
r = (bits & W_BIT ? EISDIR : OK);
|
|
|
|
break;
|
|
|
|
case I_CHAR_SPECIAL:
|
|
|
|
/* Invoke the driver for special processing. */
|
|
|
|
dev = (dev_t) vp->v_sdev;
|
|
|
|
r = dev_open(dev, who_e, bits | (oflags & ~O_ACCMODE));
|
|
|
|
if (r == SUSPEND) suspend(FP_BLOCKED_ON_DOPEN);
|
|
|
|
break;
|
|
|
|
case I_BLOCK_SPECIAL:
|
|
|
|
/* Invoke the driver for special processing. */
|
|
|
|
dev = (dev_t) vp->v_sdev;
|
|
|
|
r = dev_open(dev, who_e, bits | (oflags & ~O_ACCMODE));
|
2010-01-21 16:02:29 +01:00
|
|
|
if (r != OK) break;
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
|
|
|
|
/* Check whether the device is mounted or not. If so,
|
|
|
|
then that FS is responsible for this device. Else
|
|
|
|
we default to ROOT_FS. */
|
|
|
|
vp->v_bfs_e = ROOT_FS_E; /* By default */
|
|
|
|
for (vmp = &vmnt[0]; vmp < &vmnt[NR_MNTS]; ++vmp)
|
|
|
|
if (vmp->m_dev == vp->v_sdev)
|
|
|
|
vp->v_bfs_e = vmp->m_fs_e;
|
|
|
|
|
|
|
|
/* Get the driver endpoint of the block spec device */
|
|
|
|
dp = &dmap[(vp->v_sdev >> MAJOR) & BYTE];
|
|
|
|
if (dp->dmap_driver == NONE) {
|
|
|
|
printf("VFS: driver not found for device %d\n",
|
|
|
|
vp->v_sdev);
|
|
|
|
r = ENXIO;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Send the driver endpoint (even when known already)*/
|
|
|
|
if ((r = req_newdriver(vp->v_bfs_e, vp->v_sdev,
|
|
|
|
dp->dmap_driver)) != OK) {
|
|
|
|
printf("VFS: error sending driver endpoint\n");
|
|
|
|
r = ENXIO;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
case I_NAMED_PIPE:
|
|
|
|
/* Create a mapped inode on PFS which handles reads
|
|
|
|
and writes to this named pipe. */
|
|
|
|
r = map_vnode(vp);
|
|
|
|
if (r == OK) {
|
|
|
|
vp->v_pipe = I_PIPE;
|
|
|
|
if (vp->v_ref_count == 1) {
|
|
|
|
vp->v_pipe_rd_pos = 0;
|
|
|
|
vp->v_pipe_wr_pos = 0;
|
|
|
|
if (vp->v_size != 0)
|
|
|
|
r = truncate_vnode(vp, 0);
|
|
|
|
}
|
|
|
|
oflags |= O_APPEND; /* force append mode */
|
|
|
|
fil_ptr->filp_flags = oflags;
|
|
|
|
}
|
|
|
|
if (r == OK) {
|
|
|
|
r = pipe_open(vp, bits, oflags);
|
|
|
|
}
|
|
|
|
if (r != ENXIO) {
|
|
|
|
/* See if someone else is doing a rd or wt on
|
|
|
|
* the FIFO. If so, use its filp entry so the
|
|
|
|
* file position will be automatically shared.
|
|
|
|
*/
|
|
|
|
b = (bits & R_BIT ? R_BIT : W_BIT);
|
|
|
|
fil_ptr->filp_count = 0; /* don't find self */
|
|
|
|
if ((filp2 = find_filp(vp, b)) != NIL_FILP) {
|
|
|
|
/* Co-reader or writer found. Use it.*/
|
|
|
|
fp->fp_filp[m_in.fd] = filp2;
|
|
|
|
filp2->filp_count++;
|
|
|
|
filp2->filp_vno = vp;
|
|
|
|
filp2->filp_flags = oflags;
|
|
|
|
|
|
|
|
/* v_count was incremented after the
|
|
|
|
* vnode has been found. i_count was
|
|
|
|
* incremented incorrectly in FS, not
|
|
|
|
* knowing that we were going to use an
|
|
|
|
* existing filp entry. Correct this
|
|
|
|
* error.
|
|
|
|
*/
|
|
|
|
put_vnode(vp);
|
|
|
|
} else {
|
|
|
|
/* Nobody else found. Restore filp. */
|
|
|
|
fil_ptr->filp_count = 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
2006-10-25 15:40:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/* If error, release inode. */
|
|
|
|
if (r != OK) {
|
|
|
|
if (r == SUSPEND) return(r); /* Oops, just suspended */
|
|
|
|
fp->fp_filp[m_in.fd] = NIL_FILP;
|
|
|
|
FD_CLR(m_in.fd, &fp->fp_filp_inuse);
|
|
|
|
fil_ptr->filp_count= 0;
|
|
|
|
put_vnode(vp);
|
|
|
|
fil_ptr->filp_vno = NIL_VNODE;
|
|
|
|
return(r);
|
|
|
|
}
|
|
|
|
|
|
|
|
return(m_in.fd);
|
|
|
|
}
|
|
|
|
|
2007-08-07 14:52:47 +02:00
|
|
|
|
|
|
|
/*===========================================================================*
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
* new_node *
|
2007-01-05 17:36:55 +01:00
|
|
|
*===========================================================================*/
|
2010-01-21 10:32:15 +01:00
|
|
|
PRIVATE struct vnode *new_node(int oflags, mode_t bits)
|
2007-08-07 14:52:47 +02:00
|
|
|
{
|
2010-01-21 10:32:15 +01:00
|
|
|
/* Try to create a new inode and return a pointer to it. If the inode already
|
|
|
|
exists, return a pointer to it as well, but set err_code accordingly.
|
|
|
|
NIL_VNODE is returned if the path cannot be resolved up to the last
|
|
|
|
directory, or when the inode cannot be created due to permissions or
|
|
|
|
otherwise. */
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
struct vnode *dirp, *vp;
|
2010-01-21 10:32:15 +01:00
|
|
|
int r, flags;
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
struct node_details res;
|
|
|
|
|
2010-01-21 10:32:15 +01:00
|
|
|
/* When O_CREAT and O_EXCL flags are set, the path may not be named by a
|
|
|
|
* symbolic link. */
|
|
|
|
flags = PATH_NOFLAGS;
|
|
|
|
if (oflags & O_EXCL) flags |= PATH_RET_SYMLINK;
|
|
|
|
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
/* See if the path can be opened down to the last directory. */
|
|
|
|
if ((dirp = last_dir()) == NIL_VNODE) return(NIL_VNODE);
|
|
|
|
|
|
|
|
/* The final directory is accessible. Get final component of the path. */
|
2010-01-21 10:32:15 +01:00
|
|
|
vp = advance(dirp, flags);
|
|
|
|
|
|
|
|
/* The combination of a symlink with absolute path followed by a danglink
|
|
|
|
* symlink results in a new path that needs to be re-resolved entirely. */
|
|
|
|
if (user_fullpath[0] == '/') return new_node(oflags, bits);
|
|
|
|
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
if (vp == NIL_VNODE && err_code == ENOENT) {
|
|
|
|
/* Last path component does not exist. Make a new directory entry. */
|
|
|
|
if ((vp = get_free_vnode()) == NIL_VNODE) {
|
|
|
|
/* Can't create new vnode: out of vnodes. */
|
|
|
|
put_vnode(dirp);
|
|
|
|
return(NIL_VNODE);
|
2007-08-07 14:52:47 +02:00
|
|
|
}
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
if ((r = forbidden(dirp, W_BIT|X_BIT)) != OK ||
|
|
|
|
(r = req_create(dirp->v_fs_e, dirp->v_inode_nr,bits, fp->fp_effuid,
|
|
|
|
fp->fp_effgid, user_fullpath, &res)) != OK ) {
|
2010-01-21 10:32:15 +01:00
|
|
|
/* Can't create inode either due to permissions or some other
|
|
|
|
* problem. In case r is EEXIST, we might be dealing with a
|
|
|
|
* dangling symlink.*/
|
|
|
|
if (r == EEXIST) {
|
|
|
|
struct vnode *slp, *old_wd;
|
|
|
|
|
|
|
|
/* Resolve path up to symlink */
|
|
|
|
slp = advance(dirp, PATH_RET_SYMLINK);
|
|
|
|
if (slp != NIL_VNODE) {
|
|
|
|
if (S_ISLNK(slp->v_mode)) {
|
|
|
|
/* Get contents of link */
|
|
|
|
|
|
|
|
int max_linklen;
|
|
|
|
max_linklen = sizeof(user_fullpath)-1;
|
|
|
|
r = req_rdlink(slp->v_fs_e,
|
|
|
|
slp->v_inode_nr,
|
|
|
|
VFS_PROC_NR,
|
|
|
|
user_fullpath,
|
|
|
|
max_linklen);
|
|
|
|
if (r < 0) {
|
|
|
|
/* Failed to read link */
|
|
|
|
put_vnode(slp);
|
|
|
|
put_vnode(dirp);
|
|
|
|
err_code = r;
|
|
|
|
return(NIL_VNODE);
|
|
|
|
}
|
|
|
|
user_fullpath[r] = '\0';/* Term. path*/
|
|
|
|
}
|
|
|
|
put_vnode(slp);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Try to create the inode the dangling symlink was
|
|
|
|
* pointing to. We have to use dirp as starting point
|
|
|
|
* as there might be multiple successive symlinks
|
|
|
|
* crossing multiple mountpoints. */
|
|
|
|
old_wd = fp->fp_wd; /* Save orig. working dirp */
|
|
|
|
fp->fp_wd = dirp;
|
|
|
|
vp = new_node(oflags, bits);
|
|
|
|
fp->fp_wd = old_wd; /* Restore */
|
|
|
|
|
|
|
|
if (vp != NIL_VNODE) {
|
|
|
|
put_vnode(dirp);
|
|
|
|
return(vp);
|
|
|
|
}
|
|
|
|
r = err_code;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (r == EEXIST)
|
|
|
|
err_code = EIO; /* Impossible, we have verified that
|
|
|
|
* the last component doesn't exist and
|
|
|
|
* is not a dangling symlink. */
|
|
|
|
else
|
|
|
|
err_code = r;
|
|
|
|
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
put_vnode(dirp);
|
|
|
|
return(NIL_VNODE);
|
2007-08-07 14:52:47 +02:00
|
|
|
}
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
|
|
|
|
/* Store results and mark vnode in use */
|
|
|
|
vp->v_fs_e = res.fs_e;
|
|
|
|
vp->v_inode_nr = res.inode_nr;
|
|
|
|
vp->v_mode = res.fmode;
|
|
|
|
vp->v_size = res.fsize;
|
|
|
|
vp->v_uid = res.uid;
|
|
|
|
vp->v_gid = res.gid;
|
|
|
|
vp->v_sdev = res.dev;
|
|
|
|
vp->v_vmnt = dirp->v_vmnt;
|
|
|
|
vp->v_dev = vp->v_vmnt->m_dev;
|
|
|
|
vp->v_fs_count = 1;
|
|
|
|
vp->v_ref_count = 1;
|
|
|
|
} else {
|
|
|
|
/* Either last component exists, or there is some other problem. */
|
|
|
|
if (vp != NIL_VNODE)
|
2010-01-21 10:32:15 +01:00
|
|
|
r = EEXIST; /* File exists or a symlink names a file while
|
|
|
|
* O_EXCL is set. */
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
else
|
2010-01-21 10:32:15 +01:00
|
|
|
r = err_code; /* Other problem. */
|
2007-08-07 14:52:47 +02:00
|
|
|
}
|
|
|
|
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
err_code = r;
|
|
|
|
put_vnode(dirp);
|
|
|
|
return(vp);
|
2007-08-07 14:52:47 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2006-10-25 15:40:36 +02:00
|
|
|
/*===========================================================================*
|
|
|
|
* pipe_open *
|
|
|
|
*===========================================================================*/
|
|
|
|
PRIVATE int pipe_open(register struct vnode *vp, register mode_t bits,
|
|
|
|
register int oflags)
|
|
|
|
{
|
|
|
|
/* This function is called from common_open. It checks if
|
|
|
|
* there is at least one reader/writer pair for the pipe, if not
|
|
|
|
* it suspends the caller, otherwise it revives all other blocked
|
|
|
|
* processes hanging on the pipe.
|
|
|
|
*/
|
|
|
|
|
|
|
|
vp->v_pipe = I_PIPE;
|
|
|
|
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
if((bits & (R_BIT|W_BIT)) == (R_BIT|W_BIT)) return(ENXIO);
|
2006-10-25 15:40:36 +02:00
|
|
|
|
|
|
|
if (find_filp(vp, bits & W_BIT ? R_BIT : W_BIT) == NIL_FILP) {
|
|
|
|
if (oflags & O_NONBLOCK) {
|
|
|
|
if (bits & W_BIT) return(ENXIO);
|
|
|
|
} else {
|
2009-09-22 23:48:26 +02:00
|
|
|
suspend(FP_BLOCKED_ON_POPEN); /* suspend caller */
|
2006-10-25 15:40:36 +02:00
|
|
|
return(SUSPEND);
|
|
|
|
}
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
} else if (susp_count > 0) { /* revive blocked processes */
|
2006-10-25 15:40:36 +02:00
|
|
|
release(vp, OPEN, susp_count);
|
|
|
|
release(vp, CREAT, susp_count);
|
|
|
|
}
|
|
|
|
return(OK);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*===========================================================================*
|
|
|
|
* do_mknod *
|
|
|
|
*===========================================================================*/
|
|
|
|
PUBLIC int do_mknod()
|
|
|
|
{
|
|
|
|
/* Perform the mknod(name, mode, addr) system call. */
|
|
|
|
register mode_t bits, mode_bits;
|
|
|
|
int r;
|
2007-08-07 14:52:47 +02:00
|
|
|
struct vnode *vp;
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
|
2006-10-25 15:40:36 +02:00
|
|
|
/* Only the super_user may make nodes other than fifos. */
|
|
|
|
mode_bits = (mode_t) m_in.mk_mode; /* mode of the inode */
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
if(!super_user && ((mode_bits & I_TYPE) != I_NAMED_PIPE)) return(EPERM);
|
2006-10-25 15:40:36 +02:00
|
|
|
bits = (mode_bits & I_TYPE) | (mode_bits & ALL_MODES & fp->fp_umask);
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
|
|
|
|
/* Open directory that's going to hold the new node. */
|
|
|
|
if(fetch_name(m_in.name1, m_in.name1_length, M1) != OK) return(err_code);
|
|
|
|
if((vp = last_dir()) == NIL_VNODE) return(err_code);
|
2007-08-07 14:52:47 +02:00
|
|
|
|
2007-08-08 16:01:36 +02:00
|
|
|
/* Make sure that the object is a directory */
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
if((vp->v_mode & I_TYPE) != I_DIRECTORY) {
|
|
|
|
put_vnode(vp);
|
|
|
|
return(ENOTDIR);
|
2007-08-08 16:01:36 +02:00
|
|
|
}
|
|
|
|
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
if ((r = forbidden(vp, W_BIT|X_BIT)) == OK) {
|
|
|
|
r = req_mknod(vp->v_fs_e, vp->v_inode_nr, user_fullpath, fp->fp_effuid,
|
|
|
|
fp->fp_effgid, bits, m_in.mk_z0);
|
2007-08-07 14:52:47 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
put_vnode(vp);
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
return(r);
|
2006-10-25 15:40:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*===========================================================================*
|
|
|
|
* do_mkdir *
|
|
|
|
*===========================================================================*/
|
|
|
|
PUBLIC int do_mkdir()
|
|
|
|
{
|
|
|
|
/* Perform the mkdir(name, mode) system call. */
|
|
|
|
mode_t bits; /* mode bits for the new inode */
|
|
|
|
int r;
|
2007-08-07 14:52:47 +02:00
|
|
|
struct vnode *vp;
|
2006-10-25 15:40:36 +02:00
|
|
|
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
if(fetch_name(m_in.name1, m_in.name1_length, M1) != OK) return(err_code);
|
2006-10-25 15:40:36 +02:00
|
|
|
|
|
|
|
bits = I_DIRECTORY | (m_in.mode & RWX_MODES & fp->fp_umask);
|
|
|
|
|
|
|
|
/* Request lookup */
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
if((vp = last_dir()) == NIL_VNODE) return(err_code);
|
2007-08-07 14:52:47 +02:00
|
|
|
|
2007-08-08 16:01:36 +02:00
|
|
|
/* Make sure that the object is a directory */
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
if ((vp->v_mode & I_TYPE) != I_DIRECTORY) {
|
|
|
|
put_vnode(vp);
|
|
|
|
return(ENOTDIR);
|
2007-08-08 16:01:36 +02:00
|
|
|
}
|
|
|
|
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
if ((r = forbidden(vp, W_BIT|X_BIT)) == OK) {
|
|
|
|
r = req_mkdir(vp->v_fs_e, vp->v_inode_nr, user_fullpath, fp->fp_effuid,
|
|
|
|
fp->fp_effgid, bits);
|
2007-08-07 14:52:47 +02:00
|
|
|
}
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
|
2007-08-07 14:52:47 +02:00
|
|
|
put_vnode(vp);
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
return(r);
|
2006-10-25 15:40:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*===========================================================================*
|
|
|
|
* do_lseek *
|
|
|
|
*===========================================================================*/
|
|
|
|
PUBLIC int do_lseek()
|
|
|
|
{
|
|
|
|
/* Perform the lseek(ls_fd, offset, whence) system call. */
|
|
|
|
register struct filp *rfilp;
|
2006-11-27 15:21:43 +01:00
|
|
|
int r;
|
|
|
|
long offset;
|
|
|
|
u64_t pos, newpos;
|
|
|
|
|
|
|
|
/* Check to see if the file descriptor is valid. */
|
|
|
|
if ( (rfilp = get_filp(m_in.ls_fd)) == NIL_FILP) return(err_code);
|
|
|
|
|
|
|
|
/* No lseek on pipes. */
|
|
|
|
if (rfilp->filp_vno->v_pipe == I_PIPE) return(ESPIPE);
|
|
|
|
|
|
|
|
/* The value of 'whence' determines the start position to use. */
|
|
|
|
switch(m_in.whence) {
|
|
|
|
case SEEK_SET: pos = cvu64(0); break;
|
|
|
|
case SEEK_CUR: pos = rfilp->filp_pos; break;
|
|
|
|
case SEEK_END: pos = cvul64(rfilp->filp_vno->v_size); break;
|
|
|
|
default: return(EINVAL);
|
|
|
|
}
|
|
|
|
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
offset = m_in.offset_lo;
|
2006-11-27 15:21:43 +01:00
|
|
|
if (offset >= 0)
|
|
|
|
newpos= add64ul(pos, offset);
|
|
|
|
else
|
|
|
|
newpos= sub64ul(pos, -offset);
|
|
|
|
|
|
|
|
/* Check for overflow. */
|
|
|
|
if (ex64hi(newpos) != 0)
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
return(EINVAL);
|
2006-11-27 15:21:43 +01:00
|
|
|
|
|
|
|
if (cmp64(newpos, rfilp->filp_pos) != 0) { /* Inhibit read ahead request */
|
2007-08-07 14:52:47 +02:00
|
|
|
r = req_inhibread(rfilp->filp_vno->v_fs_e, rfilp->filp_vno->v_inode_nr);
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
if (r != OK) return(r);
|
2006-11-27 15:21:43 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
rfilp->filp_pos = newpos;
|
|
|
|
|
|
|
|
/* insert the new position into the output message */
|
|
|
|
m_out.reply_l1 = ex64lo(newpos);
|
|
|
|
|
|
|
|
return(OK);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*===========================================================================*
|
|
|
|
* do_llseek *
|
|
|
|
*===========================================================================*/
|
|
|
|
PUBLIC int do_llseek()
|
|
|
|
{
|
|
|
|
/* Perform the llseek(ls_fd, offset, whence) system call. */
|
|
|
|
register struct filp *rfilp;
|
|
|
|
u64_t pos, newpos;
|
2006-10-25 15:40:36 +02:00
|
|
|
int r;
|
|
|
|
|
|
|
|
/* Check to see if the file descriptor is valid. */
|
|
|
|
if ( (rfilp = get_filp(m_in.ls_fd)) == NIL_FILP) return(err_code);
|
|
|
|
|
|
|
|
/* No lseek on pipes. */
|
|
|
|
if (rfilp->filp_vno->v_pipe == I_PIPE) return(ESPIPE);
|
|
|
|
|
|
|
|
/* The value of 'whence' determines the start position to use. */
|
|
|
|
switch(m_in.whence) {
|
2006-11-27 15:21:43 +01:00
|
|
|
case SEEK_SET: pos = cvu64(0); break;
|
2006-10-25 15:40:36 +02:00
|
|
|
case SEEK_CUR: pos = rfilp->filp_pos; break;
|
2006-11-27 15:21:43 +01:00
|
|
|
case SEEK_END: pos = cvul64(rfilp->filp_vno->v_size); break;
|
2006-10-25 15:40:36 +02:00
|
|
|
default: return(EINVAL);
|
|
|
|
}
|
|
|
|
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
newpos = add64(pos, make64(m_in.offset_lo, m_in.offset_high));
|
2006-11-27 15:21:43 +01:00
|
|
|
|
2006-10-25 15:40:36 +02:00
|
|
|
/* Check for overflow. */
|
2006-11-27 15:21:43 +01:00
|
|
|
if (((long)m_in.offset_high > 0) && cmp64(newpos, pos) < 0)
|
2006-10-25 15:40:36 +02:00
|
|
|
return(EINVAL);
|
2006-11-27 15:21:43 +01:00
|
|
|
if (((long)m_in.offset_high < 0) && cmp64(newpos, pos) > 0)
|
2006-10-25 15:40:36 +02:00
|
|
|
return(EINVAL);
|
|
|
|
|
2006-11-27 15:21:43 +01:00
|
|
|
if (cmp64(newpos, rfilp->filp_pos) != 0) { /* Inhibit read ahead request */
|
2007-08-07 14:52:47 +02:00
|
|
|
r = req_inhibread(rfilp->filp_vno->v_fs_e, rfilp->filp_vno->v_inode_nr);
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
if (r != OK) return(r);
|
2006-10-25 15:40:36 +02:00
|
|
|
}
|
|
|
|
|
2006-11-27 15:21:43 +01:00
|
|
|
rfilp->filp_pos = newpos;
|
|
|
|
m_out.reply_l1 = ex64lo(newpos);
|
|
|
|
m_out.reply_l2 = ex64hi(newpos);
|
2006-10-25 15:40:36 +02:00
|
|
|
return(OK);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*===========================================================================*
|
|
|
|
* do_close *
|
|
|
|
*===========================================================================*/
|
|
|
|
PUBLIC int do_close()
|
|
|
|
{
|
|
|
|
/* Perform the close(fd) system call. */
|
|
|
|
return close_fd(fp, m_in.fd);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*===========================================================================*
|
|
|
|
* close_fd *
|
|
|
|
*===========================================================================*/
|
|
|
|
PUBLIC int close_fd(rfp, fd_nr)
|
|
|
|
struct fproc *rfp;
|
|
|
|
int fd_nr;
|
|
|
|
{
|
|
|
|
/* Perform the close(fd) system call. */
|
|
|
|
register struct filp *rfilp;
|
|
|
|
register struct vnode *vp;
|
|
|
|
struct file_lock *flp;
|
2008-02-22 14:57:11 +01:00
|
|
|
int lock_count;
|
2006-10-25 15:40:36 +02:00
|
|
|
|
|
|
|
/* First locate the vnode that belongs to the file descriptor. */
|
|
|
|
if ( (rfilp = get_filp2(rfp, fd_nr)) == NIL_FILP) return(err_code);
|
|
|
|
vp = rfilp->filp_vno;
|
2008-02-22 14:57:11 +01:00
|
|
|
close_filp(rfilp);
|
2006-10-25 15:40:36 +02:00
|
|
|
|
2008-02-22 14:57:11 +01:00
|
|
|
FD_CLR(fd_nr, &rfp->fp_cloexec_set);
|
|
|
|
rfp->fp_filp[fd_nr] = NIL_FILP;
|
|
|
|
FD_CLR(fd_nr, &rfp->fp_filp_inuse);
|
|
|
|
|
|
|
|
/* Check to see if the file is locked. If so, release all locks. */
|
|
|
|
if (nr_locks == 0) return(OK);
|
|
|
|
lock_count = nr_locks; /* save count of locks */
|
|
|
|
for (flp = &file_lock[0]; flp < &file_lock[NR_LOCKS]; flp++) {
|
|
|
|
if (flp->lock_type == 0) continue; /* slot not in use */
|
|
|
|
if (flp->lock_vnode == vp && flp->lock_pid == rfp->fp_pid) {
|
|
|
|
flp->lock_type = 0;
|
|
|
|
nr_locks--;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (nr_locks < lock_count) lock_revive(); /* lock released */
|
|
|
|
return(OK);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*===========================================================================*
|
|
|
|
* close_filp *
|
|
|
|
*===========================================================================*/
|
|
|
|
PUBLIC void close_filp(fp)
|
|
|
|
struct filp *fp;
|
|
|
|
{
|
|
|
|
int mode_word, rw;
|
|
|
|
dev_t dev;
|
|
|
|
struct vnode *vp;
|
|
|
|
|
|
|
|
vp = fp->filp_vno;
|
|
|
|
if (fp->filp_count - 1 == 0 && fp->filp_mode != FILP_CLOSED) {
|
2006-10-25 15:40:36 +02:00
|
|
|
/* Check to see if the file is special. */
|
|
|
|
mode_word = vp->v_mode & I_TYPE;
|
|
|
|
if (mode_word == I_CHAR_SPECIAL || mode_word == I_BLOCK_SPECIAL) {
|
|
|
|
dev = (dev_t) vp->v_sdev;
|
|
|
|
if (mode_word == I_BLOCK_SPECIAL) {
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
if (vp->v_bfs_e == ROOT_FS_E) {
|
2006-11-27 15:21:43 +01:00
|
|
|
/* Invalidate the cache unless the special is
|
|
|
|
* mounted. Assume that the root filesystem's
|
|
|
|
* is open only for fsck.
|
|
|
|
*/
|
|
|
|
req_flush(vp->v_bfs_e, dev);
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
}
|
2006-10-25 15:40:36 +02:00
|
|
|
}
|
|
|
|
/* Do any special processing on device close. */
|
2008-02-22 14:57:11 +01:00
|
|
|
(void) dev_close(dev, fp-filp);
|
|
|
|
/* Ignore any errors, even SUSPEND. */
|
2010-01-21 16:02:29 +01:00
|
|
|
|
|
|
|
fp->filp_mode = FILP_CLOSED;
|
2006-10-25 15:40:36 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* If the inode being closed is a pipe, release everyone hanging on it. */
|
|
|
|
if (vp->v_pipe == I_PIPE) {
|
2008-02-22 14:57:11 +01:00
|
|
|
rw = (fp->filp_mode & R_BIT ? WRITE : READ);
|
2006-10-25 15:40:36 +02:00
|
|
|
release(vp, rw, NR_PROCS);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* If a write has been done, the inode is already marked as DIRTY. */
|
2008-02-22 14:57:11 +01:00
|
|
|
if (--fp->filp_count == 0) {
|
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 18:50:02 +01:00
|
|
|
if (vp->v_pipe == I_PIPE) {
|
2010-03-30 17:00:09 +02:00
|
|
|
/* Last reader or writer is going. Tell PFS about latest
|
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 18:50:02 +01:00
|
|
|
* pipe size.
|
|
|
|
*/
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
truncate_vnode(vp, vp->v_size);
|
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 18:50:02 +01:00
|
|
|
}
|
2006-10-25 15:40:36 +02:00
|
|
|
|
2008-02-22 14:57:11 +01:00
|
|
|
put_vnode(fp->filp_vno);
|
2006-10-25 15:40:36 +02:00
|
|
|
}
|
2008-02-22 14:57:11 +01:00
|
|
|
}
|
2006-10-25 15:40:36 +02:00
|
|
|
|
- Introduce support for sticky bit.
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
2009-12-20 21:27:14 +01:00
|
|
|
|
2008-02-22 14:57:11 +01:00
|
|
|
/*===========================================================================*
|
|
|
|
* close_reply *
|
|
|
|
*===========================================================================*/
|
|
|
|
PUBLIC void close_reply()
|
|
|
|
{
|
|
|
|
/* No need to do anything */
|
2006-10-25 15:40:36 +02:00
|
|
|
}
|
|
|
|
|