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add -lminixfs with fs support routines

Browse source 
. move cache size heuristic from mfs there
	  so mfs and ext2 can share it
	. add vfs credentials retrieving function, with
	  backwards compatability from previous struct
	  format, to be used by both ext2 and mfs
	. fix for ext2 - STATICINIT was fed no.
	  of bytes instead of no. of elements, overallocating
	  memory by a megabyte or two for the superblock
This commit is contained in:
Ben Gras 2011-09-08 16:49:54 +00:00
parent ce1a2793f9
commit 4857d5d554
19 changed files with 202 additions and 91 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
common/include/Makefile.inc
View file

@ -18,7 +18,7 @@ INCS+= minix/acpi.h minix/ansi.h minix/audio_fw.h minix/bitmap.h \
minix/sound.h minix/spin.h minix/sys_config.h minix/sysinfo.h \
minix/syslib.h minix/sysutil.h minix/timers.h minix/type.h \
minix/tty.h minix/u64.h minix/usb.h minix/usb_ch9.h minix/vm.h \
minix/vfsif.h minix/vtreefs.h
minix/vfsif.h minix/vtreefs.h minix/libminixfs.h
INCS+= net/gen/arp_io.h net/gen/dhcp.h net/gen/ether.h \
net/gen/eth_hdr.h net/gen/eth_io.h net/gen/icmp.h \

16
common/include/minix/libminixfs.h Normal file
View file

@ -0,0 +1,16 @@
/* Prototypes for -lminixfs. */
#ifndef _MINIX_FSLIB_H
#define _MINIX_FSLIB_H
#include <minix/safecopies.h>
#include <minix/sef.h>
#include <minix/vfsif.h>
int fs_lookup_credentials(vfs_ucred_t *credentials,
uid_t *caller_uid, gid_t *caller_gid, cp_grant_id_t grant2, size_t cred_size);
u32_t fs_bufs_heuristic(int minbufs, u32_t btotal, u32_t bfree,
int blocksize, dev_t majordev);
#endif /* _MINIX_FSLIB_H */

10
common/include/minix/vfsif.h
View file

@ -82,6 +82,16 @@ typedef struct {
gid_t vu_sgroups[NGROUPS_MAX];
} vfs_ucred_t;
#define NGROUPS_MAX_OLD 8
/* User credential structure before increasing
* uid_t and gid_t u8_t */
typedef struct {
short vu_uid;
char vu_gid;
int vu_ngroups;
char vu_sgroups[NGROUPS_MAX_OLD];
} vfs_ucred_old_t;
/* Request numbers */
#define REQ_GETNODE (VFS_BASE + 1) /* Should be removed */
#define REQ_PUTNODE (VFS_BASE + 2)

3
include/limits.h
View file

@ -83,7 +83,6 @@
/* Some of these old names had better be defined when not POSIX. */
#define _NO_LIMIT 100 /* arbitrary number; limit not enforced */
#define NGROUPS_MAX 8 /* max. number of supplemental groups */
#if _EM_WSIZE > 2
#define ARG_MAX 262144 /* # bytes of args + environ for exec() */
#else
@ -113,6 +112,8 @@
#define IOV_MAX INT_MAX /* maximum number of buffers for readv/writev */
#endif /* _POSIX_SOURCE */
#define NGROUPS_MAX 8 /* max. number of supplemental groups */
#define GID_MAX USHRT_MAX
#define UID_MAX USHRT_MAX

2
lib/Makefile
View file

@ -18,7 +18,7 @@ SUBDIR= csu ${LIBCOMPAT_DIR} ${LIBC_DIR} libdriver libnetdriver \
libedit ${LIBM_DIR} libsys libtimers libminixutil libbz2 libl libhgfs \
libz libfetch libarchive libvtreefs libaudiodriver libmthread \
libexec libdevman libusb ${LIBMINLIB_DIR} ${LIBASYN_DIR} \
libddekit
libddekit libminixfs
.if defined(NBSD_LIBC) && (${NBSD_LIBC} != "no")
SUBDIR+= libelf libminc libcrypt libterminfo libcurses libvassert

8
lib/libminixfs/Makefile Normal file
View file

@ -0,0 +1,8 @@
# Makefile for libminixfs
.include <bsd.own.mk>
LIB= minixfs
SRCS= fetch_credentials.c cache.c
.include <bsd.lib.mk>

59
lib/libminixfs/cache.c Normal file
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@ -0,0 +1,59 @@
#define _SYSTEM
#include <minix/libminixfs.h>
#include <minix/dmap.h>
#include <minix/u64.h>
#include <sys/param.h>
#include <errno.h>
u32_t fs_bufs_heuristic(int minbufs, u32_t btotal, u32_t bfree,
int blocksize, dev_t majordev)
{
struct vm_stats_info vsi;
int bufs;
u32_t kbytes_used_fs, kbytes_total_fs, kbcache, kb_fsmax;
u32_t kbytes_remain_mem, bused;
bused = btotal-bfree;
/* but we simply need minbufs no matter what, and we don't
* want more than that if we're a memory device
*/
if(majordev == MEMORY_MAJOR) {
return minbufs;
}
/* set a reasonable cache size; cache at most a certain
* portion of the used FS, and at most a certain %age of remaining
* memory
*/
if((vm_info_stats(&vsi) != OK)) {
bufs = 1024;
printf("fslib: heuristic info fail: default to %d bufs\n", bufs);
return bufs;
}
kbytes_remain_mem = div64u(mul64u(vsi.vsi_free, vsi.vsi_pagesize), 1024);
/* check fs usage. */
kbytes_used_fs = div64u(mul64u(bused, blocksize), 1024);
kbytes_total_fs = div64u(mul64u(btotal, blocksize), 1024);
/* heuristic for a desired cache size based on FS usage;
* but never bigger than half of the total filesystem
*/
kb_fsmax = sqrt_approx(kbytes_used_fs)*40;
kb_fsmax = MIN(kb_fsmax, kbytes_total_fs/2);
/* heuristic for a maximum usage - 10% of remaining memory */
kbcache = MIN(kbytes_remain_mem/10, kb_fsmax);
bufs = kbcache * 1024 / blocksize;
/* but we simply need MINBUFS no matter what */
if(bufs < minbufs)
bufs = minbufs;
return bufs;
}

51
lib/libminixfs/fetch_credentials.c Normal file
View file

@ -0,0 +1,51 @@
#include <minix/vfsif.h>
#include <minix/type.h>
#include <assert.h>
#include "minixfs.h"
int fs_lookup_credentials(vfs_ucred_t *credentials,
uid_t *caller_uid, gid_t *caller_gid, cp_grant_id_t grant2, size_t cred_size)
{
vfs_ucred_old_t old_cred;
int r;
memset(credentials, 0, sizeof(*credentials));
if(cred_size == sizeof(*credentials)) {
r = sys_safecopyfrom(VFS_PROC_NR, grant2, (vir_bytes) 0,
(vir_bytes) credentials, cred_size, D);
if (r != OK) {
printf("FS: cred copy (regular) failed.\n");
return(r);
}
} else if(cred_size == sizeof(old_cred)) {
int g;
r = sys_safecopyfrom(VFS_PROC_NR, grant2, (vir_bytes) 0,
(vir_bytes) &old_cred, sizeof(old_cred), D);
if (r != OK) {
printf("FS: cred copy (fallback) failed.\n");
return(r);
}
credentials->vu_ngroups = old_cred.vu_ngroups;
credentials->vu_uid = old_cred.vu_uid;
credentials->vu_gid = old_cred.vu_gid;
for(g = 0; g < NGROUPS_MAX_OLD; g++) {
assert(g < NGROUPS_MAX);
credentials->vu_sgroups[g] = old_cred.vu_sgroups[g];
}
} else {
static int w = 0;
if(!w) { printf("FS: cred size incompatible with VFS.\n"); w = 1; }
return(EINVAL); /* Wrong size. */
}
assert(credentials->vu_ngroups <= NGROUPS_MAX);
*caller_uid = credentials->vu_uid;
*caller_gid = credentials->vu_gid;
return OK;
}

4
lib/libminixfs/minixfs.h Normal file
View file

@ -0,0 +1,4 @@
#define _SYSTEM
#include <lib.h> /* common to all libraries */
#include <minix/com.h> /* need task numbers + message types */

5
servers/ext2/Makefile
View file

@ -6,14 +6,11 @@ SRCS= balloc.c cache.c device.c link.c \
write.c ialloc.c inode.c main.c path.c \
super.c optset.c
DPADD+= ${LIBSYS}
LDADD+= -lsys
LDADD+= -lminixfs -lsys
MAN=
BINDIR?= /sbin
INSTALLFLAGS+= -S 128k
DEFAULT_NR_BUFS= 1024
CPPFLAGS+= -DDEFAULT_NR_BUFS=${DEFAULT_NR_BUFS}
.include <minix.service.mk>

9
servers/ext2/cache.c
View file

@ -17,6 +17,7 @@
#include "fs.h"
#include <minix/u64.h>
#include <minix/libminixfs.h>
#include <stdlib.h>
#include <assert.h>
#include "buf.h"
@ -489,10 +490,12 @@ PRIVATE void rm_lru(
/*===========================================================================*
* set_blocksize *
*===========================================================================*/
PUBLIC void set_blocksize(unsigned int blocksize)
PUBLIC void set_blocksize(unsigned int blocksize, u32_t blocks,
u32_t freeblocks, dev_t majordev)
{
struct buf *bp;
struct inode *rip;
int new_nr_bufs;
ASSERT(blocksize > 0);
@ -502,7 +505,9 @@ PUBLIC void set_blocksize(unsigned int blocksize)
for (rip = &inode[0]; rip < &inode[NR_INODES]; rip++)
if (rip->i_count > 0) panic("change blocksize with inode in use");
buf_pool(nr_bufs);
new_nr_bufs = fs_bufs_heuristic(10, blocks, freeblocks, blocksize, majordev);
buf_pool(new_nr_bufs);
fs_block_size = blocksize;
}

4
servers/ext2/main.c
View file

@ -157,7 +157,9 @@ PRIVATE int sef_cb_init_fresh(int type, sef_init_info_t *info)
driver_endpoints[i].driver_e = NONE;
SELF_E = getprocnr();
buf_pool(DEFAULT_NR_BUFS);
/* just a small number before we find out the block size at mount time */
buf_pool(10);
fs_block_size = _MIN_BLOCK_SIZE;
return(OK);

7
servers/ext2/mount.c
View file

@ -70,7 +70,7 @@ PUBLIC int fs_readsuper()
}
/* Fill in the super block. */
STATICINIT(superblock, sizeof(struct super_block));
STATICINIT(superblock, 1);
if (!superblock)
panic("Can't allocate memory for superblock.");
superblock->s_dev = fs_dev; /* read_super() needs to know which dev */
@ -125,7 +125,10 @@ PUBLIC int fs_readsuper()
}
set_blocksize(superblock->s_block_size);
set_blocksize(superblock->s_block_size,
superblock->s_blocks_count,
superblock->s_free_blocks_count,
major(fs_dev));
/* Get the root inode of the mounted file system. */
if ( (root_ip = get_inode(fs_dev, ROOT_INODE)) == NULL) {

27
servers/ext2/path.c
View file

@ -36,10 +36,10 @@ FORWARD _PROTOTYPE( int parse_path, (ino_t dir_ino, ino_t root_ino,
*===========================================================================*/
PUBLIC int fs_lookup()
{
cp_grant_id_t grant, grant2;
cp_grant_id_t grant;
int r, r1, flags, symlinks;
unsigned int len;
size_t offset = 0, path_size, cred_size;
size_t offset = 0, path_size;
ino_t dir_ino, root_ino;
struct inode *rip;
@ -62,21 +62,16 @@ PUBLIC int fs_lookup()
/* Verify this is a null-terminated path. */
if(user_path[len - 1] != '\0') return(EINVAL);
if(flags & PATH_GET_UCRED) { /* Do we have to copy uid/gid credentials? */
grant2 = (cp_grant_id_t) fs_m_in.REQ_GRANT2;
cred_size = (size_t) fs_m_in.REQ_UCRED_SIZE;
if (cred_size > sizeof(credentials)) return(EINVAL); /* Too big. */
r = sys_safecopyfrom(VFS_PROC_NR, grant2, (vir_bytes) 0,
(vir_bytes) &credentials, cred_size, D);
if (r != OK) return(r);
caller_uid = (uid_t) credentials.vu_uid;
caller_gid = (gid_t) credentials.vu_gid;
} else {
memset(&credentials, 0, sizeof(credentials));
caller_uid = fs_m_in.REQ_UID;
caller_gid = fs_m_in.REQ_GID;
if(!(flags & PATH_GET_UCRED)) { /* Do we have to copy uid/gid credentials? */
caller_uid = (uid_t) fs_m_in.REQ_UID;
caller_gid = (gid_t) fs_m_in.REQ_GID;
} else {
if((r=fs_lookup_credentials(&credentials,
&caller_uid, &caller_gid,
(cp_grant_id_t) fs_m_in.REQ_GRANT2,
(size_t) fs_m_in.REQ_UCRED_SIZE)) != OK)
return r;
}
/* Lookup inode */

3
servers/ext2/proto.h
View file

@ -21,7 +21,8 @@ _PROTOTYPE( void flushall, (dev_t dev) );
_PROTOTYPE( struct buf *get_block, (dev_t dev, block_t block,int only_search));
_PROTOTYPE( void invalidate, (dev_t device) );
_PROTOTYPE( void put_block, (struct buf *bp, int block_type) );
_PROTOTYPE( void set_blocksize, (unsigned int blocksize) );
_PROTOTYPE( void set_blocksize, (unsigned int blocksize, u32_t blocks,
u32_t freeblocks, dev_t major));
_PROTOTYPE( void rw_scattered, (dev_t dev,
struct buf **bufq, int bufqsize, int rw_flag) );

5
servers/ext2/super.c
View file

@ -85,14 +85,17 @@ register struct super_block *sp; /* pointer to a superblock */
super_block_offset = opt.block_with_super * 1024;
}
STATICINIT(ondisk_superblock, sizeof(struct super_block));
STATICINIT(ondisk_superblock, 1);
if (!sp || !ondisk_superblock)
panic("can't allocate memory for super_block buffers");
printf("ext2: reading %d bytes into %d buffer\n", _MIN_BLOCK_SIZE, sizeof(*ondisk_superblock));
r = block_dev_io(MFS_DEV_READ, dev, SELF_E,
(char*) ondisk_superblock, cvu64(super_block_offset),
_MIN_BLOCK_SIZE);
if (r != _MIN_BLOCK_SIZE)
return(EINVAL);

2
servers/mfs/Makefile
View file

@ -6,7 +6,7 @@ SRCS= cache.c device.c link.c \
write.c inode.c main.c path.c super.c
DPADD+= ${LIBM} ${LIBSYS}
LDADD+= -lsys
LDADD+= -lminixfs -lsys
MAN=

47
servers/mfs/cache.c
View file

@ -19,6 +19,7 @@
#include <sys/param.h>
#include <stdlib.h>
#include <assert.h>
#include <minix/libminixfs.h>
#include <math.h>
#include "buf.h"
#include "super.h"
@ -567,52 +568,12 @@ PRIVATE void cache_resize(unsigned int blocksize, unsigned int bufs)
*===========================================================================*/
PRIVATE int bufs_heuristic(struct super_block *sp)
{
struct vm_stats_info vsi;
int bufs;
u32_t btotal, bfree, bused, kbytes_used_fs,
kbytes_total_fs, kbcache, kb_fsmax;
u32_t kbytes_remain_mem;
u32_t btotal, bfree, bused;
/* but we simply need MINBUFS no matter what, and we don't
* want more than that if we're a memory device
*/
if(major(sp->s_dev) == MEMORY_MAJOR) {
bufs = MINBUFS;
return bufs;
}
/* set a reasonable cache size; cache at most a certain
* portion of the used FS, and at most a certain %age of remaining
* memory
*/
if((vm_info_stats(&vsi) != OK)) {
bufs = 1024;
printf("mfs: heuristic info fail: default to %d bufs\n", bufs);
return bufs;
}
kbytes_remain_mem = div64u(mul64u(vsi.vsi_free, vsi.vsi_pagesize), 1024);
/* check fs usage. */
blockstats(&btotal, &bfree, &bused);
kbytes_used_fs = div64u(mul64u(bused, sp->s_block_size), 1024);
kbytes_total_fs = div64u(mul64u(btotal, sp->s_block_size), 1024);
/* heuristic for a desired cache size based on FS usage;
* but never bigger than half of the total filesystem
*/
kb_fsmax = sqrt_approx(kbytes_used_fs)*40;
kb_fsmax = MIN(kb_fsmax, kbytes_total_fs/2);
/* heuristic for a maximum usage - 10% of remaining memory */
kbcache = MIN(kbytes_remain_mem/10, kb_fsmax);
bufs = kbcache * 1024 / sp->s_block_size;
/* but we simply need MINBUFS no matter what */
if(bufs < MINBUFS)
bufs = MINBUFS;
return bufs;
return fs_bufs_heuristic(MINBUFS, btotal, bfree,
sp->s_block_size, major(sp->s_dev));
}
/*===========================================================================*

23
servers/mfs/path.c
View file

@ -36,10 +36,10 @@ FORWARD _PROTOTYPE( int parse_path, (ino_t dir_ino, ino_t root_ino,
*===========================================================================*/
PUBLIC int fs_lookup()
{
cp_grant_id_t grant, grant2;
cp_grant_id_t grant;
int r, r1, flags, symlinks;
unsigned int len;
size_t offset = 0, path_size, cred_size;
size_t offset = 0, path_size;
ino_t dir_ino, root_ino;
struct inode *rip;
@ -62,21 +62,16 @@ PUBLIC int fs_lookup()
/* Verify this is a null-terminated path. */
if(user_path[len - 1] != '\0') return(EINVAL);
if(flags & PATH_GET_UCRED) { /* Do we have to copy uid/gid credentials? */
grant2 = (cp_grant_id_t) fs_m_in.REQ_GRANT2;
cred_size = (size_t) fs_m_in.REQ_UCRED_SIZE;
if (cred_size > sizeof(credentials)) return(EINVAL); /* Too big. */
r = sys_safecopyfrom(VFS_PROC_NR, grant2, (vir_bytes) 0,
(vir_bytes) &credentials, cred_size, D);
if (r != OK) return(r);
caller_uid = credentials.vu_uid;
caller_gid = credentials.vu_gid;
} else {
memset(&credentials, 0, sizeof(credentials));
if(!(flags & PATH_GET_UCRED)) { /* Do we have to copy uid/gid credentials? */
caller_uid = (uid_t) fs_m_in.REQ_UID;
caller_gid = (gid_t) fs_m_in.REQ_GID;
} else {
if((r=fs_lookup_credentials(&credentials,
&caller_uid, &caller_gid,
(cp_grant_id_t) fs_m_in.REQ_GRANT2,
(size_t) fs_m_in.REQ_UCRED_SIZE)) != OK)
return r;
}
/* Lookup inode */