File: [Development] / xfs-linux / linux-2.4 / Attic / xfs_super.c (download)
Revision 1.230, Mon Dec 2 05:53:26 2002 UTC (14 years, 10 months ago) by nathans
Branch: MAIN
Changes since 1.229: +7 -10
lines
Sector size updates - macros for calculating address/size of sector-sized
data structures (sb,agf,agi,agfl) are now sector size aware. Cleaned up
the early mount code dealing with log devices and logsectsize.
Don't unilaterally set the sector size to 512 bytes, remove unneeded code.
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/*
* Copyright (c) 2000-2002 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
*/
#include <xfs.h>
#include <linux/bitops.h>
#include <linux/blkdev.h>
#include <linux/pagemap.h>
#include <linux/major.h>
#include <linux/init.h>
#include <linux/ctype.h>
#include <linux/seq_file.h>
#include "xfs_version.h"
/* xfs_vfs[ops].c */
extern int xfs_init(void);
extern void xfs_cleanup(void);
#ifndef EVMS_MAJOR
# define EVMS_MAJOR 117
#endif
/* For kernels which have the s_maxbytes field - set it */
#ifdef MAX_NON_LFS
# define set_max_bytes(sb) ((sb)->s_maxbytes = XFS_MAX_FILE_OFFSET)
#else
# define set_max_bytes(sb) do { } while (0)
#endif
#ifdef CONFIG_FS_POSIX_ACL
# define set_posix_acl(sb) ((sb)->s_flags |= MS_POSIXACL)
#else
# define set_posix_acl(sb) do { } while (0)
#endif
#ifdef CONFIG_XFS_QUOTA
STATIC struct quotactl_ops linvfs_qops = {
.get_xstate = linvfs_getxstate,
.set_xstate = linvfs_setxstate,
.get_xquota = linvfs_getxquota,
.set_xquota = linvfs_setxquota,
};
# define set_quota_ops(sb) ((sb)->s_qcop = &linvfs_qops)
#else
# define set_quota_ops(sb) do { } while (0)
#endif
#ifdef CONFIG_XFS_DMAPI
int dmapi_init(void);
void dmapi_uninit(void);
#else
#define dmapi_init()
#define dmapi_uninit()
#endif
STATIC struct super_operations linvfs_sops;
#define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
#define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
#define MNTOPT_LOGDEV "logdev" /* log device */
#define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
#define MNTOPT_DMAPI "dmapi" /* DMI enabled (DMAPI / XDSM) */
#define MNTOPT_XDSM "xdsm" /* DMI enabled (DMAPI / XDSM) */
#define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
#define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
#define MNTOPT_INO64 "ino64" /* force inodes into 64-bit range */
#define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
#define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
#define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
#define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
#define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
#define MNTOPT_QUOTA "quota" /* disk quotas */
#define MNTOPT_NOQUOTA "noquota" /* no quotas */
#define MNTOPT_UQUOTA "usrquota" /* user quota enabled */
#define MNTOPT_GQUOTA "grpquota" /* group quota enabled */
#define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
#define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
#define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
#define MNTOPT_NOUUID "nouuid" /* Ignore FS uuid */
#define MNTOPT_NOLOGFLUSH "nologflush" /* Don't use hard flushes in
log writing */
#define MNTOPT_MTPT "mtpt" /* filesystem mount point */
STATIC int
xfs_parseargs(
char *options,
int flags,
struct xfs_mount_args *args)
{
char *this_char, *value, *eov;
int dsunit, dswidth, vol_dsunit, vol_dswidth;
int logbufs, logbufsize;
int iosize;
/* Default to 32 bit inodes on linux all the time */
args->flags |= XFSMNT_32BITINODES;
/* Copy the already-parsed mount(2) flags we're interested in */
if (flags & MS_NOATIME)
args->flags |= XFSMNT_NOATIME;
if (!options) {
args->logbufs = args->logbufsize = -1;
return 0;
}
logbufs = logbufsize = -1;
iosize = dsunit = dswidth = vol_dsunit = vol_dswidth = 0;
while ((this_char = strsep(&options, ",")) != NULL) {
if (!*this_char)
continue;
if ((value = strchr(this_char, '=')) != NULL)
*value++ = 0;
if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
if (!value || !*value) {
printk("XFS: %s option requires an argument\n",
MNTOPT_LOGBUFS);
return -EINVAL;
}
logbufs = simple_strtoul(value, &eov, 10);
} else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
int in_kilobytes = 0;
if (!value || !*value) {
printk("XFS: %s option requires an argument\n",
MNTOPT_LOGBSIZE);
return -EINVAL;
}
if (toupper(value[strlen(value)-1]) == 'K') {
in_kilobytes = 1;
value[strlen(value)-1] = '\0';
}
logbufsize = simple_strtoul(value, &eov, 10);
if (in_kilobytes)
logbufsize = logbufsize * 1024;
} else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
if (!value || !*value) {
printk("XFS: %s option requires an argument\n",
MNTOPT_LOGDEV);
return -EINVAL;
}
strncpy(args->logname, value, MAXNAMELEN);
} else if (!strcmp(this_char, MNTOPT_MTPT)) {
if (!value || !*value) {
printk("XFS: %s option requires an argument\n",
MNTOPT_MTPT);
return -EINVAL;
}
strncpy(args->mtpt, value, MAXNAMELEN);
#if CONFIG_XFS_DMAPI
} else if (!strcmp(this_char, MNTOPT_DMAPI)) {
args->flags |= XFSMNT_DMAPI;
} else if (!strcmp(this_char, MNTOPT_XDSM)) {
args->flags |= XFSMNT_DMAPI;
#else
} else if (!strcmp(this_char, MNTOPT_DMAPI) ||
!strcmp(this_char, MNTOPT_XDSM)) {
printk("XFS: this kernel does not support dmapi/xdsm.\n");
return -EINVAL;
#endif
} else if (!strcmp(this_char, MNTOPT_RTDEV)) {
if (!value || !*value) {
printk("XFS: %s option requires an argument\n",
MNTOPT_RTDEV);
return -EINVAL;
}
strncpy(args->rtname, value, MAXNAMELEN);
} else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
if (!value || !*value) {
printk("XFS: %s option requires an argument\n",
MNTOPT_BIOSIZE);
return -EINVAL;
}
iosize = simple_strtoul(value, &eov, 10);
args->flags |= XFSMNT_IOSIZE;
args->iosizelog = (uint8_t) iosize;
} else if (!strcmp(this_char, MNTOPT_WSYNC)) {
args->flags |= XFSMNT_WSYNC;
} else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
args->flags |= XFSMNT_OSYNCISOSYNC;
} else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
args->flags |= XFSMNT_NORECOVERY;
} else if (!strcmp(this_char, MNTOPT_INO64)) {
#ifdef XFS_BIG_FILESYSTEMS
args->flags |= XFSMNT_INO64;
#else
printk("XFS: %s option not allowed on this system\n",
MNTOPT_INO64);
return -EINVAL;
#endif
} else if (!strcmp(this_char, MNTOPT_UQUOTA)) {
args->flags |= XFSMNT_UQUOTA | XFSMNT_UQUOTAENF;
} else if (!strcmp(this_char, MNTOPT_QUOTA)) {
args->flags |= XFSMNT_UQUOTA | XFSMNT_UQUOTAENF;
} else if (!strcmp(this_char, MNTOPT_UQUOTANOENF)) {
args->flags |= XFSMNT_UQUOTA;
args->flags &= ~XFSMNT_UQUOTAENF;
} else if (!strcmp(this_char, MNTOPT_QUOTANOENF)) {
args->flags |= XFSMNT_UQUOTA;
args->flags &= ~XFSMNT_UQUOTAENF;
} else if (!strcmp(this_char, MNTOPT_GQUOTA)) {
args->flags |= XFSMNT_GQUOTA | XFSMNT_GQUOTAENF;
} else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
args->flags |= XFSMNT_GQUOTA;
args->flags &= ~XFSMNT_GQUOTAENF;
} else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
args->flags |= XFSMNT_NOALIGN;
} else if (!strcmp(this_char, MNTOPT_SUNIT)) {
if (!value || !*value) {
printk("XFS: %s option requires an argument\n",
MNTOPT_SUNIT);
return -EINVAL;
}
dsunit = simple_strtoul(value, &eov, 10);
} else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
if (!value || !*value) {
printk("XFS: %s option requires an argument\n",
MNTOPT_SWIDTH);
return -EINVAL;
}
dswidth = simple_strtoul(value, &eov, 10);
} else if (!strcmp(this_char, MNTOPT_NOUUID)) {
args->flags |= XFSMNT_NOUUID;
} else if (!strcmp(this_char, MNTOPT_NOLOGFLUSH)) {
args->flags |= XFSMNT_NOLOGFLUSH;
} else if (!strcmp(this_char, "osyncisdsync")) {
/* no-op, this is now the default */
printk("XFS: osyncisdsync is now the default, option is deprecated.\n");
} else if (!strcmp(this_char, "irixsgid")) {
printk("XFS: irixsgid is now a sysctl(2) variable, option is deprecated.\n");
} else {
printk("XFS: unknown mount option [%s].\n", this_char);
return -EINVAL;
}
}
if (args->flags & XFSMNT_NORECOVERY) {
if ((flags & MS_RDONLY) == 0) {
printk("XFS: no-recovery mounts must be read-only.\n");
return -EINVAL;
}
}
if ((args->flags & XFSMNT_NOALIGN) && (dsunit || dswidth)) {
printk(
"XFS: sunit and swidth options incompatible with the noalign option\n");
return -EINVAL;
}
if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
printk("XFS: sunit and swidth must be specified together\n");
return -EINVAL;
}
if (dsunit && (dswidth % dsunit != 0)) {
printk(
"XFS: stripe width (%d) must be a multiple of the stripe unit (%d)\n",
dswidth, dsunit);
return -EINVAL;
}
if ((args->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
if (dsunit) {
args->sunit = dsunit;
args->flags |= XFSMNT_RETERR;
} else
args->sunit = vol_dsunit;
dswidth ? (args->swidth = dswidth) :
(args->swidth = vol_dswidth);
} else
args->sunit = args->swidth = 0;
args->logbufs = logbufs;
args->logbufsize = logbufsize;
return 0;
}
STATIC int
xfs_showargs(
struct vfs *vfsp,
struct seq_file *m)
{
static struct proc_xfs_info {
int flag;
char *str;
} xfs_info[] = {
/* the few simple ones we can get from the mount struct */
{ XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
{ XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
{ XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC },
{ XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
{ 0, NULL }
};
struct proc_xfs_info *xfs_infop;
struct xfs_mount *mp = XFS_BHVTOM(vfsp->vfs_fbhv);
for (xfs_infop = xfs_info; xfs_infop->flag; xfs_infop++) {
if (mp->m_flags & xfs_infop->flag)
seq_puts(m, xfs_infop->str);
}
if (mp->m_qflags & XFS_UQUOTA_ACCT) {
(mp->m_qflags & XFS_UQUOTA_ENFD) ?
seq_puts(m, "," MNTOPT_UQUOTA) :
seq_puts(m, "," MNTOPT_UQUOTANOENF);
}
if (mp->m_qflags & XFS_GQUOTA_ACCT) {
(mp->m_qflags & XFS_GQUOTA_ENFD) ?
seq_puts(m, "," MNTOPT_GQUOTA) :
seq_puts(m, "," MNTOPT_GQUOTANOENF);
}
if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
seq_printf(m, "," MNTOPT_BIOSIZE "=%d", mp->m_writeio_log);
if (mp->m_logbufs > 0)
seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
if (mp->m_logbsize > 0)
seq_printf(m, "," MNTOPT_LOGBSIZE "=%d", mp->m_logbsize);
if (mp->m_ddev_targp->pbr_dev != mp->m_logdev_targp->pbr_dev)
seq_printf(m, "," MNTOPT_LOGDEV "=%s",
bdevname(mp->m_logdev_targp->pbr_dev));
if (mp->m_rtdev_targp &&
mp->m_ddev_targp->pbr_dev != mp->m_rtdev_targp->pbr_dev)
seq_printf(m, "," MNTOPT_RTDEV "=%s",
bdevname(mp->m_rtdev_targp->pbr_dev));
if (mp->m_dalign > 0)
seq_printf(m, "," MNTOPT_SUNIT "=%d",
(int)XFS_FSB_TO_BB(mp, mp->m_dalign));
if (mp->m_swidth > 0)
seq_printf(m, "," MNTOPT_SWIDTH "=%d",
(int)XFS_FSB_TO_BB(mp, mp->m_swidth));
if (vfsp->vfs_flag & VFS_DMI)
seq_puts(m, "," MNTOPT_DMAPI);
return 0;
}
STATIC __inline__ void
xfs_set_inodeops(
struct inode *inode)
{
vnode_t *vp = LINVFS_GET_VP(inode);
if (vp->v_type == VNON) {
remove_inode_hash(inode);
make_bad_inode(inode);
} else if (S_ISREG(inode->i_mode)) {
inode->i_op = &linvfs_file_inode_operations;
inode->i_fop = &linvfs_file_operations;
inode->i_mapping->a_ops = &linvfs_aops;
} else if (S_ISDIR(inode->i_mode)) {
inode->i_op = &linvfs_dir_inode_operations;
inode->i_fop = &linvfs_dir_operations;
} else if (S_ISLNK(inode->i_mode)) {
inode->i_op = &linvfs_symlink_inode_operations;
if (inode->i_blocks)
inode->i_mapping->a_ops = &linvfs_aops;
} else {
inode->i_op = &linvfs_file_inode_operations;
init_special_inode(inode, inode->i_mode,
kdev_t_to_nr(inode->i_rdev));
}
}
STATIC __inline__ void
xfs_revalidate_inode(
xfs_mount_t *mp,
vnode_t *vp,
xfs_inode_t *ip)
{
struct inode *inode = LINVFS_GET_IP(vp);
inode->i_mode = (ip->i_d.di_mode & MODEMASK) | VTTOIF(vp->v_type);
inode->i_nlink = ip->i_d.di_nlink;
inode->i_uid = ip->i_d.di_uid;
inode->i_gid = ip->i_d.di_gid;
if (((1 << vp->v_type) & ((1<<VBLK) | (1<<VCHR))) == 0) {
inode->i_rdev = 0;
} else {
xfs_dev_t dev = ip->i_df.if_u2.if_rdev;
inode->i_rdev = XFS_DEV_TO_KDEVT(dev);
}
inode->i_blksize = PAGE_CACHE_SIZE;
inode->i_generation = ip->i_d.di_gen;
inode->i_size = ip->i_d.di_size;
inode->i_blocks =
XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
inode->i_atime = ip->i_d.di_atime.t_sec;
inode->i_mtime = ip->i_d.di_mtime.t_sec;
inode->i_ctime = ip->i_d.di_ctime.t_sec;
vp->v_flag &= ~VMODIFIED;
}
void
xfs_initialize_vnode(
bhv_desc_t *bdp,
vnode_t *vp,
bhv_desc_t *inode_bhv,
int unlock)
{
xfs_inode_t *ip = XFS_BHVTOI(inode_bhv);
struct inode *inode = LINVFS_GET_IP(vp);
if (vp->v_fbhv == NULL) {
vp->v_vfsp = bhvtovfs(bdp);
bhv_desc_init(&(ip->i_bhv_desc), ip, vp, &xfs_vnodeops);
bhv_insert_initial(VN_BHV_HEAD(vp), &(ip->i_bhv_desc));
}
vp->v_type = IFTOVT(ip->i_d.di_mode);
/* Have we been called during the new inode create process,
* in which case we are too early to fill in the linux inode.
*/
if (vp->v_type == VNON)
return;
xfs_revalidate_inode(XFS_BHVTOM(bdp), vp, ip);
/* For new inodes we need to set the ops vectors,
* and unlock the inode.
*/
if (unlock && (inode->i_state & I_NEW)) {
xfs_set_inodeops(inode);
unlock_new_inode(inode);
}
}
int
xfs_blkdev_get(
const char *name,
struct block_device **bdevp)
{
struct nameidata nd;
int error = 0;
if (path_init(name, LOOKUP_POSITIVE|LOOKUP_FOLLOW, &nd))
error = path_walk(name, &nd);
if (error) {
printk("XFS: Invalid device [%s], error=%d\n", name, error);
return -error;
}
/* I think we actually want bd_acquire here.. --hch */
*bdevp = bdget(kdev_t_to_nr(nd.dentry->d_inode->i_rdev));
if (*bdevp) {
error = blkdev_get(*bdevp, FMODE_READ|FMODE_WRITE, 0, BDEV_FS);
} else {
error = -ENOMEM;
}
path_release(&nd);
return -error;
}
void
xfs_blkdev_put(
struct block_device *bdev)
{
if (bdev)
blkdev_put(bdev, BDEV_FS);
}
void
xfs_free_buftarg(
xfs_buftarg_t *btp)
{
pagebuf_delwri_flush(btp, PBDF_WAIT, NULL);
kfree(btp);
}
void
xfs_size_buftarg(
xfs_buftarg_t *btp,
unsigned int blocksize,
unsigned int sectorsize)
{
btp->pbr_bsize = blocksize;
btp->pbr_sshift = ffs(sectorsize) - 1;
btp->pbr_smask = sectorsize - 1;
if (set_blocksize(btp->pbr_kdev, sectorsize)) {
printk(KERN_WARNING
"XFS: Cannot set_blocksize to %u on device 0x%x\n",
sectorsize, kdev_t_to_nr(btp->pbr_kdev));
}
}
xfs_buftarg_t *
xfs_alloc_buftarg(
struct block_device *bdev)
{
xfs_buftarg_t *btp;
btp = kmem_zalloc(sizeof(*btp), KM_SLEEP);
btp->pbr_dev = bdev->bd_dev;
btp->pbr_kdev = to_kdev_t(btp->pbr_dev);
btp->pbr_bdev = bdev;
btp->pbr_mapping = bdev->bd_inode->i_mapping;
xfs_size_buftarg(btp, PAGE_CACHE_SIZE,
get_hardsect_size(btp->pbr_kdev));
switch (MAJOR(btp->pbr_dev)) {
case MD_MAJOR:
case EVMS_MAJOR:
btp->pbr_flags = PBR_ALIGNED_ONLY;
break;
case LVM_BLK_MAJOR:
btp->pbr_flags = PBR_SECTOR_ONLY;
break;
}
return btp;
}
STATIC kmem_cache_t * linvfs_inode_cachep;
STATIC __inline__ unsigned int gfp_mask(void)
{
/* If we're not in a transaction, FS activity is ok */
if (current->flags & PF_FSTRANS) return GFP_NOFS;
return GFP_KERNEL;
}
STATIC struct inode *
linvfs_alloc_inode(
struct super_block *sb)
{
vnode_t *vp;
vp = (vnode_t *)kmem_cache_alloc(linvfs_inode_cachep, gfp_mask());
if (!vp)
return NULL;
return LINVFS_GET_IP(vp);
}
STATIC void
linvfs_destroy_inode(
struct inode *inode)
{
kmem_cache_free(linvfs_inode_cachep, LINVFS_GET_VP(inode));
}
STATIC void
init_once(
void *data,
kmem_cache_t *cachep,
unsigned long flags)
{
vnode_t *vp = (vnode_t *)data;
if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
SLAB_CTOR_CONSTRUCTOR)
inode_init_once(LINVFS_GET_IP(vp));
}
STATIC int
init_inodecache( void )
{
linvfs_inode_cachep = kmem_cache_create("linvfs_icache",
sizeof(vnode_t), 0, SLAB_HWCACHE_ALIGN,
init_once, NULL);
if (linvfs_inode_cachep == NULL)
return -ENOMEM;
return 0;
}
STATIC void
destroy_inodecache( void )
{
if (kmem_cache_destroy(linvfs_inode_cachep))
printk(KERN_INFO
"linvfs_inode_cache: not all structures were freed\n");
}
STATIC struct super_block *
linvfs_read_super(
struct super_block *sb,
void *data,
int silent)
{
vfs_t *vfsp;
vfsops_t *vfsops;
vnode_t *rootvp;
struct inode *ip;
struct xfs_mount_args *args;
struct statfs statvfs;
int ss, error;
args = kmalloc(sizeof(struct xfs_mount_args), GFP_KERNEL);
if (!args)
return NULL;
memset(args, 0, sizeof(struct xfs_mount_args));
args->slcount = args->stimeout = args->ctimeout = -1;
strncpy(args->fsname, bdevname(sb->s_dev), MAXNAMELEN);
if (xfs_parseargs((char *)data, sb->s_flags, args))
goto out_null;
/* Kludge in XFS until we have other VFS/VNODE FSs */
vfsops = &xfs_vfsops;
/* Set up the vfs_t structure */
vfsp = vfs_allocate();
if (!vfsp)
goto out_null;
if (sb->s_flags & MS_RDONLY)
vfsp->vfs_flag |= VFS_RDONLY;
vfsp->vfs_super = sb;
set_max_bytes(sb);
set_quota_ops(sb);
sb->s_op = &linvfs_sops;
ss = get_hardsect_size(sb->s_dev);
if (ss < BBSIZE)
ss = BBSIZE;
set_blocksize(sb->s_dev, ss);
LINVFS_SET_VFS(sb, vfsp);
VFSOPS_MOUNT(vfsops, vfsp, args, NULL, error);
if (error)
goto fail_vfsop;
VFS_STATVFS(vfsp, &statvfs, NULL, error);
if (error)
goto fail_unmount;
sb->s_magic = XFS_SB_MAGIC;
sb->s_dirt = 1;
sb->s_blocksize = statvfs.f_bsize;
sb->s_blocksize_bits = ffs(statvfs.f_bsize) - 1;
set_posix_acl(sb);
VFS_ROOT(vfsp, &rootvp, error);
if (error)
goto fail_unmount;
ip = LINVFS_GET_IP(rootvp);
sb->s_root = d_alloc_root(ip);
if (!sb->s_root)
goto fail_vnrele;
if (is_bad_inode(sb->s_root->d_inode))
goto fail_vnrele;
/* Don't set the VFS_DMI flag until here because we don't want
* to send events while replaying the log.
*/
if (args->flags & XFSMNT_DMAPI) {
vfsp->vfs_flag |= VFS_DMI;
VFSOPS_DMAPI_MOUNT(vfsops, vfsp, args->mtpt, args->fsname,
error);
if (error) {
if (atomic_read(&sb->s_active) == 1)
vfsp->vfs_flag &= ~VFS_DMI;
goto fail_vnrele;
}
}
vn_trace_exit(rootvp, __FUNCTION__, (inst_t *)__return_address);
kfree(args);
return sb;
fail_vnrele:
if (sb->s_root) {
dput(sb->s_root);
sb->s_root = NULL;
} else {
VN_RELE(rootvp);
}
fail_unmount:
VFS_UNMOUNT(vfsp, 0, NULL, error);
fail_vfsop:
vfs_deallocate(vfsp);
out_null:
kfree(args);
return NULL;
}
/*
* We do not actually write the inode here, just mark the
* super block dirty so that sync_supers calls us and
* forces the flush.
*/
STATIC void
linvfs_write_inode(
struct inode *inode,
int sync)
{
vnode_t *vp = LINVFS_GET_VP(inode);
int error, flags = FLUSH_INODE;
if (vp) {
vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
if (sync)
flags |= FLUSH_SYNC;
VOP_IFLUSH(vp, flags, error);
if (error == EAGAIN)
inode->i_sb->s_dirt = 1;
}
}
STATIC void
linvfs_clear_inode(
struct inode *inode)
{
vnode_t *vp = LINVFS_GET_VP(inode);
if (vp) {
vn_rele(vp);
vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
/*
* Do all our cleanup, and remove this vnode.
*/
vn_remove(vp);
}
}
STATIC void
linvfs_put_inode(
struct inode *ip)
{
vnode_t *vp = LINVFS_GET_VP(ip);
int error;
if (vp && vp->v_fbhv && (atomic_read(&ip->i_count) == 1))
VOP_RELEASE(vp, error);
}
STATIC void
linvfs_put_super(
struct super_block *sb)
{
vfs_t *vfsp = LINVFS_GET_VFS(sb);
int error;
VFS_DOUNMOUNT(vfsp, 0, NULL, NULL, error);
if (error) {
printk("XFS unmount got error %d\n", error);
printk("%s: vfsp/0x%p left dangling!\n", __FUNCTION__, vfsp);
return;
}
vfs_deallocate(vfsp);
}
STATIC void
linvfs_write_super(
struct super_block *sb)
{
vfs_t *vfsp = LINVFS_GET_VFS(sb);
int error;
sb->s_dirt = 0;
if (sb->s_flags & MS_RDONLY)
return;
VFS_SYNC(vfsp, SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR,
NULL, error);
}
STATIC int
linvfs_statfs(
struct super_block *sb,
struct statfs *statp)
{
vfs_t *vfsp = LINVFS_GET_VFS(sb);
int error;
VFS_STATVFS(vfsp, statp, NULL, error);
return error;
}
STATIC int
linvfs_remount(
struct super_block *sb,
int *flags,
char *options)
{
struct xfs_mount_args *args;
vfs_t *vfsp;
xfs_mount_t *mp;
int error = 0;
vfsp = LINVFS_GET_VFS(sb);
mp = XFS_BHVTOM(vfsp->vfs_fbhv);
args = kmalloc(sizeof(struct xfs_mount_args), GFP_KERNEL);
if (!args)
return -ENOMEM;
memset(args, 0, sizeof(struct xfs_mount_args));
args->slcount = args->stimeout = args->ctimeout = -1;
if (xfs_parseargs(options, *flags, args)) {
error = -EINVAL;
goto out;
}
if (args->flags & XFSMNT_NOATIME)
mp->m_flags |= XFS_MOUNT_NOATIME;
else
mp->m_flags &= ~XFS_MOUNT_NOATIME;
set_posix_acl(sb);
linvfs_write_super(sb);
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
goto out;
if (*flags & MS_RDONLY) {
sb->s_flags |= MS_RDONLY;
XFS_log_write_unmount_ro(vfsp->vfs_fbhv);
vfsp->vfs_flag |= VFS_RDONLY;
} else {
vfsp->vfs_flag &= ~VFS_RDONLY;
}
out:
kfree(args);
return error;
}
STATIC void
linvfs_freeze_fs(
struct super_block *sb)
{
vfs_t *vfsp;
vnode_t *vp;
int error;
vfsp = LINVFS_GET_VFS(sb);
if (sb->s_flags & MS_RDONLY)
return;
VFS_ROOT(vfsp, &vp, error);
VOP_IOCTL(vp, LINVFS_GET_IP(vp), NULL, XFS_IOC_FREEZE, 0, error);
VN_RELE(vp);
}
STATIC void
linvfs_unfreeze_fs(
struct super_block *sb)
{
vfs_t *vfsp;
vnode_t *vp;
int error;
vfsp = LINVFS_GET_VFS(sb);
VFS_ROOT(vfsp, &vp, error);
VOP_IOCTL(vp, LINVFS_GET_IP(vp), NULL, XFS_IOC_THAW, 0, error);
VN_RELE(vp);
}
STATIC int
linvfs_dentry_to_fh(
struct dentry *dentry,
__u32 *data,
int *lenp,
int need_parent)
{
struct inode *inode = dentry->d_inode ;
vnode_t *vp = LINVFS_GET_VP(inode);
int maxlen = *lenp;
xfs_fid2_t fid;
int error;
if (maxlen < 3)
return 255 ;
VOP_FID2(vp, (struct fid *)&fid, error);
data[0] = (__u32)fid.fid_ino; /* 32 bits of inode is OK */
data[1] = fid.fid_gen;
*lenp = 2 ;
if (maxlen < 4 || ! need_parent)
return 2 ;
inode = dentry->d_parent->d_inode ;
vp = LINVFS_GET_VP(inode);
VOP_FID2(vp, (struct fid *)&fid, error);
data[2] = (__u32)fid.fid_ino; /* 32 bits of inode is OK */
*lenp = 3 ;
if (maxlen < 4)
return 3 ;
data[3] = fid.fid_gen;
*lenp = 4 ;
return 4 ;
}
STATIC struct dentry *
linvfs_fh_to_dentry(
struct super_block *sb,
__u32 *data,
int len,
int fhtype,
int parent)
{
vnode_t *vp;
struct inode *inode = NULL;
struct list_head *lp;
struct dentry *result;
xfs_fid2_t xfid;
vfs_t *vfsp = LINVFS_GET_VFS(sb);
int error;
xfid.fid_len = sizeof(xfs_fid2_t) - sizeof(xfid.fid_len);
xfid.fid_pad = 0;
if (!parent) {
xfid.fid_gen = data[1];
xfid.fid_ino = (__u64)data[0];
} else {
if (fhtype == 4)
xfid.fid_gen = data[3];
else
xfid.fid_gen = 0;
xfid.fid_ino = (__u64)data[2];
}
VFS_VGET(vfsp, &vp, (fid_t *)&xfid, error);
if (error || vp == NULL)
return ERR_PTR(-ESTALE) ;
inode = LINVFS_GET_IP(vp);
spin_lock(&dcache_lock);
for (lp = inode->i_dentry.next; lp != &inode->i_dentry ; lp=lp->next) {
result = list_entry(lp,struct dentry, d_alias);
if (! (result->d_flags & DCACHE_NFSD_DISCONNECTED)) {
dget_locked(result);
result->d_vfs_flags |= DCACHE_REFERENCED;
spin_unlock(&dcache_lock);
iput(inode);
return result;
}
}
spin_unlock(&dcache_lock);
result = d_alloc_root(inode);
if (result == NULL) {
iput(inode);
return ERR_PTR(-ENOMEM);
}
result->d_flags |= DCACHE_NFSD_DISCONNECTED;
return result;
}
STATIC int
linvfs_show_options(
struct seq_file *m,
struct vfsmount *mnt)
{
vfs_t *vfsp = LINVFS_GET_VFS(mnt->mnt_sb);
return xfs_showargs(vfsp, m);
}
STATIC struct super_operations linvfs_sops = {
.alloc_inode = linvfs_alloc_inode,
.destroy_inode = linvfs_destroy_inode,
.write_inode = linvfs_write_inode,
.put_inode = linvfs_put_inode,
.clear_inode = linvfs_clear_inode,
.put_super = linvfs_put_super,
.write_super = linvfs_write_super,
.write_super_lockfs = linvfs_freeze_fs,
.unlockfs = linvfs_unfreeze_fs,
.statfs = linvfs_statfs,
.remount_fs = linvfs_remount,
.fh_to_dentry = linvfs_fh_to_dentry,
.dentry_to_fh = linvfs_dentry_to_fh,
.show_options = linvfs_show_options,
};
STATIC struct file_system_type xfs_fs_type = {
.owner = THIS_MODULE,
.name = "xfs",
.read_super = linvfs_read_super,
.fs_flags = FS_REQUIRES_DEV,
};
STATIC int __init
init_xfs_fs( void )
{
int error;
struct sysinfo si;
static char message[] __initdata =
KERN_INFO "SGI XFS " XFS_VERSION_STRING " with "
XFS_BUILD_OPTIONS " enabled\n";
printk(message);
error = init_inodecache();
if (error < 0)
return error;
error = pagebuf_init();
if (error < 0)
goto out;
si_meminfo(&si);
xfs_physmem = si.totalram;
vn_init();
xfs_init();
dmapi_init();
error = register_filesystem(&xfs_fs_type);
if (error)
goto out;
return 0;
out:
destroy_inodecache();
return error;
}
STATIC void __exit
exit_xfs_fs( void )
{
dmapi_uninit();
xfs_cleanup();
unregister_filesystem(&xfs_fs_type);
pagebuf_terminate();
destroy_inodecache();
}
module_init(init_xfs_fs);
module_exit(exit_xfs_fs);
MODULE_AUTHOR("SGI <sgi.com>");
MODULE_DESCRIPTION("SGI XFS " XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
MODULE_LICENSE("GPL");
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