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super.c
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super.c
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/*
* linux/fs/ufs/super.c
*
* Copyright (C) 1998
* Daniel Pirkl <[email protected]>
* Charles University, Faculty of Mathematics and Physics
*/
/* Derived from
*
* linux/fs/ext2/super.c
*
* Copyright (C) 1992, 1993, 1994, 1995
* Remy Card ([email protected])
* Laboratoire MASI - Institut Blaise Pascal
* Universite Pierre et Marie Curie (Paris VI)
*
* from
*
* linux/fs/minix/inode.c
*
* Copyright (C) 1991, 1992 Linus Torvalds
*
* Big-endian to little-endian byte-swapping/bitmaps by
* David S. Miller ([email protected]), 1995
*/
/*
* Inspired by
*
* linux/fs/ufs/super.c
*
* Copyright (C) 1996
* Adrian Rodriguez ([email protected])
* Laboratory for Computer Science Research Computing Facility
* Rutgers, The State University of New Jersey
*
* Copyright (C) 1996 Eddie C. Dost ([email protected])
*
* Kernel module support added on 96/04/26 by
* Stefan Reinauer <[email protected]>
*
* Module usage counts added on 96/04/29 by
* Gertjan van Wingerde <[email protected]>
*
* Clean swab support on 19970406 by
* Francois-Rene Rideau <[email protected]>
*
* 4.4BSD (FreeBSD) support added on February 1st 1998 by
* Niels Kristian Bech Jensen <[email protected]> partially based
* on code by Martin von Loewis <[email protected]>.
*
* NeXTstep support added on February 5th 1998 by
* Niels Kristian Bech Jensen <[email protected]>.
*
* write support Daniel Pirkl <[email protected]> 1998
*
* HP/UX hfs filesystem support added by
* Martin K. Petersen <[email protected]>, August 1999
*
* UFS2 (of FreeBSD 5.x) support added by
* Niraj Kumar <[email protected]>, Jan 2004
*
* UFS2 write support added by
* Evgeniy Dushistov <[email protected]>, 2007
*/
#include <linux/exportfs.h>
#include <linux/module.h>
#include <linux/bitops.h>
#include <stdarg.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/blkdev.h>
#include <linux/init.h>
#include <linux/parser.h>
#include <linux/buffer_head.h>
#include <linux/vfs.h>
#include <linux/log2.h>
#include <linux/mount.h>
#include <linux/seq_file.h>
#include "ufs_fs.h"
#include "ufs.h"
#include "swab.h"
#include "util.h"
void lock_ufs(struct super_block *sb)
{
#if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
struct ufs_sb_info *sbi = UFS_SB(sb);
mutex_lock(&sbi->mutex);
sbi->mutex_owner = current;
#endif
}
void unlock_ufs(struct super_block *sb)
{
#if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
struct ufs_sb_info *sbi = UFS_SB(sb);
sbi->mutex_owner = NULL;
mutex_unlock(&sbi->mutex);
#endif
}
static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
{
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
struct inode *inode;
if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
return ERR_PTR(-ESTALE);
inode = ufs_iget(sb, ino);
if (IS_ERR(inode))
return ERR_CAST(inode);
if (generation && inode->i_generation != generation) {
iput(inode);
return ERR_PTR(-ESTALE);
}
return inode;
}
static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
int fh_len, int fh_type)
{
return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
}
static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
int fh_len, int fh_type)
{
return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
}
static struct dentry *ufs_get_parent(struct dentry *child)
{
struct qstr dot_dot = {
.name = "..",
.len = 2,
};
ino_t ino;
ino = ufs_inode_by_name(child->d_inode, &dot_dot);
if (!ino)
return ERR_PTR(-ENOENT);
return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino));
}
static const struct export_operations ufs_export_ops = {
.fh_to_dentry = ufs_fh_to_dentry,
.fh_to_parent = ufs_fh_to_parent,
.get_parent = ufs_get_parent,
};
#ifdef CONFIG_UFS_DEBUG
/*
* Print contents of ufs_super_block, useful for debugging
*/
static void ufs_print_super_stuff(struct super_block *sb,
struct ufs_super_block_first *usb1,
struct ufs_super_block_second *usb2,
struct ufs_super_block_third *usb3)
{
u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
printk("ufs_print_super_stuff\n");
printk(" magic: 0x%x\n", magic);
if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
printk(" fs_size: %llu\n", (unsigned long long)
fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
printk(" fs_dsize: %llu\n", (unsigned long long)
fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
printk(" bsize: %u\n",
fs32_to_cpu(sb, usb1->fs_bsize));
printk(" fsize: %u\n",
fs32_to_cpu(sb, usb1->fs_fsize));
printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname);
printk(" fs_sblockloc: %llu\n", (unsigned long long)
fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long)
fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
printk(" cs_nbfree(No of free blocks): %llu\n",
(unsigned long long)
fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n",
(unsigned long long)
fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n",
(unsigned long long)
fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
printk(KERN_INFO" fs_maxsymlinklen: %u\n",
fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
} else {
printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
printk(" cgoffset: %u\n",
fs32_to_cpu(sb, usb1->fs_cgoffset));
printk(" ~cgmask: 0x%x\n",
~fs32_to_cpu(sb, usb1->fs_cgmask));
printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
printk(" fragshift: %u\n",
fs32_to_cpu(sb, usb1->fs_fragshift));
printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
printk(" fstodb: %u\n",
fs32_to_cpu(sb, usb1->fs_fsbtodb));
printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
printk(" ndir %u\n",
fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
printk(" nifree %u\n",
fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
printk(" nbfree %u\n",
fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
printk(" nffree %u\n",
fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
}
printk("\n");
}
/*
* Print contents of ufs_cylinder_group, useful for debugging
*/
static void ufs_print_cylinder_stuff(struct super_block *sb,
struct ufs_cylinder_group *cg)
{
printk("\nufs_print_cylinder_stuff\n");
printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
printk(" clustersumoff %u\n",
fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
printk(" clusteroff %u\n",
fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
printk(" nclusterblks %u\n",
fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
printk("\n");
}
#else
# define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
# define ufs_print_cylinder_stuff(sb, cg) /**/
#endif /* CONFIG_UFS_DEBUG */
static const struct super_operations ufs_super_ops;
static char error_buf[1024];
void ufs_error (struct super_block * sb, const char * function,
const char * fmt, ...)
{
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;
va_list args;
uspi = UFS_SB(sb)->s_uspi;
usb1 = ubh_get_usb_first(uspi);
if (!(sb->s_flags & MS_RDONLY)) {
usb1->fs_clean = UFS_FSBAD;
ubh_mark_buffer_dirty(USPI_UBH(uspi));
sb->s_dirt = 1;
sb->s_flags |= MS_RDONLY;
}
va_start (args, fmt);
vsnprintf (error_buf, sizeof(error_buf), fmt, args);
va_end (args);
switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
case UFS_MOUNT_ONERROR_PANIC:
panic ("UFS-fs panic (device %s): %s: %s\n",
sb->s_id, function, error_buf);
case UFS_MOUNT_ONERROR_LOCK:
case UFS_MOUNT_ONERROR_UMOUNT:
case UFS_MOUNT_ONERROR_REPAIR:
printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
sb->s_id, function, error_buf);
}
}
void ufs_panic (struct super_block * sb, const char * function,
const char * fmt, ...)
{
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;
va_list args;
uspi = UFS_SB(sb)->s_uspi;
usb1 = ubh_get_usb_first(uspi);
if (!(sb->s_flags & MS_RDONLY)) {
usb1->fs_clean = UFS_FSBAD;
ubh_mark_buffer_dirty(USPI_UBH(uspi));
sb->s_dirt = 1;
}
va_start (args, fmt);
vsnprintf (error_buf, sizeof(error_buf), fmt, args);
va_end (args);
sb->s_flags |= MS_RDONLY;
printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
sb->s_id, function, error_buf);
}
void ufs_warning (struct super_block * sb, const char * function,
const char * fmt, ...)
{
va_list args;
va_start (args, fmt);
vsnprintf (error_buf, sizeof(error_buf), fmt, args);
va_end (args);
printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
sb->s_id, function, error_buf);
}
enum {
Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
Opt_err
};
static const match_table_t tokens = {
{Opt_type_old, "ufstype=old"},
{Opt_type_sunx86, "ufstype=sunx86"},
{Opt_type_sun, "ufstype=sun"},
{Opt_type_sunos, "ufstype=sunos"},
{Opt_type_44bsd, "ufstype=44bsd"},
{Opt_type_ufs2, "ufstype=ufs2"},
{Opt_type_ufs2, "ufstype=5xbsd"},
{Opt_type_hp, "ufstype=hp"},
{Opt_type_nextstepcd, "ufstype=nextstep-cd"},
{Opt_type_nextstep, "ufstype=nextstep"},
{Opt_type_openstep, "ufstype=openstep"},
/*end of possible ufs types */
{Opt_onerror_panic, "onerror=panic"},
{Opt_onerror_lock, "onerror=lock"},
{Opt_onerror_umount, "onerror=umount"},
{Opt_onerror_repair, "onerror=repair"},
{Opt_err, NULL}
};
static int ufs_parse_options (char * options, unsigned * mount_options)
{
char * p;
UFSD("ENTER\n");
if (!options)
return 1;
while ((p = strsep(&options, ",")) != NULL) {
substring_t args[MAX_OPT_ARGS];
int token;
if (!*p)
continue;
token = match_token(p, tokens, args);
switch (token) {
case Opt_type_old:
ufs_clear_opt (*mount_options, UFSTYPE);
ufs_set_opt (*mount_options, UFSTYPE_OLD);
break;
case Opt_type_sunx86:
ufs_clear_opt (*mount_options, UFSTYPE);
ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
break;
case Opt_type_sun:
ufs_clear_opt (*mount_options, UFSTYPE);
ufs_set_opt (*mount_options, UFSTYPE_SUN);
break;
case Opt_type_sunos:
ufs_clear_opt(*mount_options, UFSTYPE);
ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
break;
case Opt_type_44bsd:
ufs_clear_opt (*mount_options, UFSTYPE);
ufs_set_opt (*mount_options, UFSTYPE_44BSD);
break;
case Opt_type_ufs2:
ufs_clear_opt(*mount_options, UFSTYPE);
ufs_set_opt(*mount_options, UFSTYPE_UFS2);
break;
case Opt_type_hp:
ufs_clear_opt (*mount_options, UFSTYPE);
ufs_set_opt (*mount_options, UFSTYPE_HP);
break;
case Opt_type_nextstepcd:
ufs_clear_opt (*mount_options, UFSTYPE);
ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
break;
case Opt_type_nextstep:
ufs_clear_opt (*mount_options, UFSTYPE);
ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
break;
case Opt_type_openstep:
ufs_clear_opt (*mount_options, UFSTYPE);
ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
break;
case Opt_onerror_panic:
ufs_clear_opt (*mount_options, ONERROR);
ufs_set_opt (*mount_options, ONERROR_PANIC);
break;
case Opt_onerror_lock:
ufs_clear_opt (*mount_options, ONERROR);
ufs_set_opt (*mount_options, ONERROR_LOCK);
break;
case Opt_onerror_umount:
ufs_clear_opt (*mount_options, ONERROR);
ufs_set_opt (*mount_options, ONERROR_UMOUNT);
break;
case Opt_onerror_repair:
printk("UFS-fs: Unable to do repair on error, "
"will lock lock instead\n");
ufs_clear_opt (*mount_options, ONERROR);
ufs_set_opt (*mount_options, ONERROR_REPAIR);
break;
default:
printk("UFS-fs: Invalid option: \"%s\" "
"or missing value\n", p);
return 0;
}
}
return 1;
}
/*
* Different types of UFS hold fs_cstotal in different
* places, and use different data structure for it.
* To make things simpler we just copy fs_cstotal to ufs_sb_private_info
*/
static void ufs_setup_cstotal(struct super_block *sb)
{
struct ufs_sb_info *sbi = UFS_SB(sb);
struct ufs_sb_private_info *uspi = sbi->s_uspi;
struct ufs_super_block_first *usb1;
struct ufs_super_block_second *usb2;
struct ufs_super_block_third *usb3;
unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
UFSD("ENTER, mtype=%u\n", mtype);
usb1 = ubh_get_usb_first(uspi);
usb2 = ubh_get_usb_second(uspi);
usb3 = ubh_get_usb_third(uspi);
if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
(usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
mtype == UFS_MOUNT_UFSTYPE_UFS2) {
/*we have statistic in different place, then usual*/
uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
} else {
uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
}
UFSD("EXIT\n");
}
/*
* Read on-disk structures associated with cylinder groups
*/
static int ufs_read_cylinder_structures(struct super_block *sb)
{
struct ufs_sb_info *sbi = UFS_SB(sb);
struct ufs_sb_private_info *uspi = sbi->s_uspi;
struct ufs_buffer_head * ubh;
unsigned char * base, * space;
unsigned size, blks, i;
struct ufs_super_block_third *usb3;
UFSD("ENTER\n");
usb3 = ubh_get_usb_third(uspi);
/*
* Read cs structures from (usually) first data block
* on the device.
*/
size = uspi->s_cssize;
blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
base = space = kmalloc(size, GFP_NOFS);
if (!base)
goto failed;
sbi->s_csp = (struct ufs_csum *)space;
for (i = 0; i < blks; i += uspi->s_fpb) {
size = uspi->s_bsize;
if (i + uspi->s_fpb > blks)
size = (blks - i) * uspi->s_fsize;
ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
if (!ubh)
goto failed;
ubh_ubhcpymem (space, ubh, size);
space += size;
ubh_brelse (ubh);
ubh = NULL;
}
/*
* Read cylinder group (we read only first fragment from block
* at this time) and prepare internal data structures for cg caching.
*/
if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS)))
goto failed;
for (i = 0; i < uspi->s_ncg; i++)
sbi->s_ucg[i] = NULL;
for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
sbi->s_ucpi[i] = NULL;
sbi->s_cgno[i] = UFS_CGNO_EMPTY;
}
for (i = 0; i < uspi->s_ncg; i++) {
UFSD("read cg %u\n", i);
if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
goto failed;
if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
goto failed;
ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
}
for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
goto failed;
sbi->s_cgno[i] = UFS_CGNO_EMPTY;
}
sbi->s_cg_loaded = 0;
UFSD("EXIT\n");
return 1;
failed:
kfree (base);
if (sbi->s_ucg) {
for (i = 0; i < uspi->s_ncg; i++)
if (sbi->s_ucg[i])
brelse (sbi->s_ucg[i]);
kfree (sbi->s_ucg);
for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
kfree (sbi->s_ucpi[i]);
}
UFSD("EXIT (FAILED)\n");
return 0;
}
/*
* Sync our internal copy of fs_cstotal with disk
*/
static void ufs_put_cstotal(struct super_block *sb)
{
unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
struct ufs_super_block_first *usb1;
struct ufs_super_block_second *usb2;
struct ufs_super_block_third *usb3;
UFSD("ENTER\n");
usb1 = ubh_get_usb_first(uspi);
usb2 = ubh_get_usb_second(uspi);
usb3 = ubh_get_usb_third(uspi);
if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
(usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
mtype == UFS_MOUNT_UFSTYPE_UFS2) {
/*we have statistic in different place, then usual*/
usb2->fs_un.fs_u2.cs_ndir =
cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
usb2->fs_un.fs_u2.cs_nbfree =
cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
usb3->fs_un1.fs_u2.cs_nifree =
cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
usb3->fs_un1.fs_u2.cs_nffree =
cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
} else {
usb1->fs_cstotal.cs_ndir =
cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
usb1->fs_cstotal.cs_nbfree =
cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
usb1->fs_cstotal.cs_nifree =
cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
usb1->fs_cstotal.cs_nffree =
cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
}
ubh_mark_buffer_dirty(USPI_UBH(uspi));
ufs_print_super_stuff(sb, usb1, usb2, usb3);
UFSD("EXIT\n");
}
/**
* ufs_put_super_internal() - put on-disk intrenal structures
* @sb: pointer to super_block structure
* Put on-disk structures associated with cylinder groups
* and write them back to disk, also update cs_total on disk
*/
static void ufs_put_super_internal(struct super_block *sb)
{
struct ufs_sb_info *sbi = UFS_SB(sb);
struct ufs_sb_private_info *uspi = sbi->s_uspi;
struct ufs_buffer_head * ubh;
unsigned char * base, * space;
unsigned blks, size, i;
UFSD("ENTER\n");
ufs_put_cstotal(sb);
size = uspi->s_cssize;
blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
base = space = (char*) sbi->s_csp;
for (i = 0; i < blks; i += uspi->s_fpb) {
size = uspi->s_bsize;
if (i + uspi->s_fpb > blks)
size = (blks - i) * uspi->s_fsize;
ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
ubh_memcpyubh (ubh, space, size);
space += size;
ubh_mark_buffer_uptodate (ubh, 1);
ubh_mark_buffer_dirty (ubh);
ubh_brelse (ubh);
}
for (i = 0; i < sbi->s_cg_loaded; i++) {
ufs_put_cylinder (sb, i);
kfree (sbi->s_ucpi[i]);
}
for (; i < UFS_MAX_GROUP_LOADED; i++)
kfree (sbi->s_ucpi[i]);
for (i = 0; i < uspi->s_ncg; i++)
brelse (sbi->s_ucg[i]);
kfree (sbi->s_ucg);
kfree (base);
UFSD("EXIT\n");
}
static int ufs_fill_super(struct super_block *sb, void *data, int silent)
{
struct ufs_sb_info * sbi;
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;
struct ufs_super_block_second * usb2;
struct ufs_super_block_third * usb3;
struct ufs_buffer_head * ubh;
struct inode *inode;
unsigned block_size, super_block_size;
unsigned flags;
unsigned super_block_offset;
unsigned maxsymlen;
int ret = -EINVAL;
uspi = NULL;
ubh = NULL;
flags = 0;
UFSD("ENTER\n");
sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
if (!sbi)
goto failed_nomem;
sb->s_fs_info = sbi;
UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
#ifndef CONFIG_UFS_FS_WRITE
if (!(sb->s_flags & MS_RDONLY)) {
printk("ufs was compiled with read-only support, "
"can't be mounted as read-write\n");
goto failed;
}
#endif
mutex_init(&sbi->mutex);
/*
* Set default mount options
* Parse mount options
*/
sbi->s_mount_opt = 0;
ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
printk("wrong mount options\n");
goto failed;
}
if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
if (!silent)
printk("You didn't specify the type of your ufs filesystem\n\n"
"mount -t ufs -o ufstype="
"sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
"default is ufstype=old\n");
ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
}
uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
sbi->s_uspi = uspi;
if (!uspi)
goto failed;
uspi->s_dirblksize = UFS_SECTOR_SIZE;
super_block_offset=UFS_SBLOCK;
/* Keep 2Gig file limit. Some UFS variants need to override
this but as I don't know which I'll let those in the know loosen
the rules */
switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
case UFS_MOUNT_UFSTYPE_44BSD:
UFSD("ufstype=44bsd\n");
uspi->s_fsize = block_size = 512;
uspi->s_fmask = ~(512 - 1);
uspi->s_fshift = 9;
uspi->s_sbsize = super_block_size = 1536;
uspi->s_sbbase = 0;
flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
break;
case UFS_MOUNT_UFSTYPE_UFS2:
UFSD("ufstype=ufs2\n");
super_block_offset=SBLOCK_UFS2;
uspi->s_fsize = block_size = 512;
uspi->s_fmask = ~(512 - 1);
uspi->s_fshift = 9;
uspi->s_sbsize = super_block_size = 1536;
uspi->s_sbbase = 0;
flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
break;
case UFS_MOUNT_UFSTYPE_SUN:
UFSD("ufstype=sun\n");
uspi->s_fsize = block_size = 1024;
uspi->s_fmask = ~(1024 - 1);
uspi->s_fshift = 10;
uspi->s_sbsize = super_block_size = 2048;
uspi->s_sbbase = 0;
uspi->s_maxsymlinklen = 0; /* Not supported on disk */
flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
break;
case UFS_MOUNT_UFSTYPE_SUNOS:
UFSD(("ufstype=sunos\n"))
uspi->s_fsize = block_size = 1024;
uspi->s_fmask = ~(1024 - 1);
uspi->s_fshift = 10;
uspi->s_sbsize = 2048;
super_block_size = 2048;
uspi->s_sbbase = 0;
uspi->s_maxsymlinklen = 0; /* Not supported on disk */
flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
break;
case UFS_MOUNT_UFSTYPE_SUNx86:
UFSD("ufstype=sunx86\n");
uspi->s_fsize = block_size = 1024;
uspi->s_fmask = ~(1024 - 1);
uspi->s_fshift = 10;
uspi->s_sbsize = super_block_size = 2048;
uspi->s_sbbase = 0;
uspi->s_maxsymlinklen = 0; /* Not supported on disk */
flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
break;
case UFS_MOUNT_UFSTYPE_OLD:
UFSD("ufstype=old\n");
uspi->s_fsize = block_size = 1024;
uspi->s_fmask = ~(1024 - 1);
uspi->s_fshift = 10;
uspi->s_sbsize = super_block_size = 2048;
uspi->s_sbbase = 0;
flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
if (!(sb->s_flags & MS_RDONLY)) {
if (!silent)
printk(KERN_INFO "ufstype=old is supported read-only\n");
sb->s_flags |= MS_RDONLY;
}
break;
case UFS_MOUNT_UFSTYPE_NEXTSTEP:
UFSD("ufstype=nextstep\n");
uspi->s_fsize = block_size = 1024;
uspi->s_fmask = ~(1024 - 1);
uspi->s_fshift = 10;
uspi->s_sbsize = super_block_size = 2048;
uspi->s_sbbase = 0;
uspi->s_dirblksize = 1024;
flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
if (!(sb->s_flags & MS_RDONLY)) {
if (!silent)
printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
sb->s_flags |= MS_RDONLY;
}
break;
case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
UFSD("ufstype=nextstep-cd\n");
uspi->s_fsize = block_size = 2048;
uspi->s_fmask = ~(2048 - 1);
uspi->s_fshift = 11;
uspi->s_sbsize = super_block_size = 2048;
uspi->s_sbbase = 0;
uspi->s_dirblksize = 1024;
flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
if (!(sb->s_flags & MS_RDONLY)) {
if (!silent)
printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
sb->s_flags |= MS_RDONLY;
}
break;
case UFS_MOUNT_UFSTYPE_OPENSTEP:
UFSD("ufstype=openstep\n");
uspi->s_fsize = block_size = 1024;
uspi->s_fmask = ~(1024 - 1);
uspi->s_fshift = 10;
uspi->s_sbsize = super_block_size = 2048;
uspi->s_sbbase = 0;
uspi->s_dirblksize = 1024;
flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
if (!(sb->s_flags & MS_RDONLY)) {
if (!silent)
printk(KERN_INFO "ufstype=openstep is supported read-only\n");
sb->s_flags |= MS_RDONLY;
}
break;
case UFS_MOUNT_UFSTYPE_HP:
UFSD("ufstype=hp\n");
uspi->s_fsize = block_size = 1024;
uspi->s_fmask = ~(1024 - 1);
uspi->s_fshift = 10;
uspi->s_sbsize = super_block_size = 2048;
uspi->s_sbbase = 0;
flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
if (!(sb->s_flags & MS_RDONLY)) {
if (!silent)
printk(KERN_INFO "ufstype=hp is supported read-only\n");
sb->s_flags |= MS_RDONLY;
}
break;
default:
if (!silent)
printk("unknown ufstype\n");
goto failed;
}
again:
if (!sb_set_blocksize(sb, block_size)) {
printk(KERN_ERR "UFS: failed to set blocksize\n");
goto failed;
}
/*
* read ufs super block from device
*/
ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
if (!ubh)
goto failed;
usb1 = ubh_get_usb_first(uspi);
usb2 = ubh_get_usb_second(uspi);
usb3 = ubh_get_usb_third(uspi);
/* Sort out mod used on SunOS 4.1.3 for fs_state */
uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
(uspi->s_postblformat != UFS_42POSTBLFMT)) {
flags &= ~UFS_ST_MASK;
flags |= UFS_ST_SUN;
}
/*
* Check ufs magic number
*/
sbi->s_bytesex = BYTESEX_LE;
switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
case UFS_MAGIC:
case UFS_MAGIC_BW:
case UFS2_MAGIC:
case UFS_MAGIC_LFN:
case UFS_MAGIC_FEA:
case UFS_MAGIC_4GB:
goto magic_found;
}
sbi->s_bytesex = BYTESEX_BE;
switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
case UFS_MAGIC:
case UFS_MAGIC_BW:
case UFS2_MAGIC:
case UFS_MAGIC_LFN:
case UFS_MAGIC_FEA:
case UFS_MAGIC_4GB:
goto magic_found;
}
if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
|| ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
|| ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
&& uspi->s_sbbase < 256) {
ubh_brelse_uspi(uspi);
ubh = NULL;
uspi->s_sbbase += 8;
goto again;
}
if (!silent)
printk("ufs_read_super: bad magic number\n");
goto failed;
magic_found:
/*
* Check block and fragment sizes
*/
uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
if (!is_power_of_2(uspi->s_fsize)) {
printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
uspi->s_fsize);
goto failed;
}
if (uspi->s_fsize < 512) {
printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
uspi->s_fsize);
goto failed;
}
if (uspi->s_fsize > 4096) {
printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
uspi->s_fsize);
goto failed;
}
if (!is_power_of_2(uspi->s_bsize)) {
printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
uspi->s_bsize);
goto failed;
}
if (uspi->s_bsize < 4096) {
printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
uspi->s_bsize);
goto failed;
}