4ca488eb45
We were already filling the Linux struct statfs anyway, and doing this trivial task directly in xfs_fs_statfs makes the code quite a bit cleaner. While I was at it I also moved copying attributes that don't change over the lifetime of the filesystem outside the superblock lock. xfs_fs_fill_super used to get the magic number and blocksize through xfs_statvfs, but assigning them directly is a lot cleaner and will save some stack space during mount. SGI-PV: 971186 SGI-Modid: xfs-linux-melb:xfs-kern:29802a Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Tim Shimmin <tes@sgi.com>
329 lines
8.8 KiB
C
329 lines
8.8 KiB
C
/*
|
|
* Copyright (c) 2000-2005 Silicon Graphics, Inc.
|
|
* All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms 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. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#ifndef __XFS_LINUX__
|
|
#define __XFS_LINUX__
|
|
|
|
#include <linux/types.h>
|
|
|
|
/*
|
|
* Some types are conditional depending on the target system.
|
|
* XFS_BIG_BLKNOS needs block layer disk addresses to be 64 bits.
|
|
* XFS_BIG_INUMS needs the VFS inode number to be 64 bits, as well
|
|
* as requiring XFS_BIG_BLKNOS to be set.
|
|
*/
|
|
#if defined(CONFIG_LBD) || (BITS_PER_LONG == 64)
|
|
# define XFS_BIG_BLKNOS 1
|
|
# if BITS_PER_LONG == 64
|
|
# define XFS_BIG_INUMS 1
|
|
# else
|
|
# define XFS_BIG_INUMS 0
|
|
# endif
|
|
#else
|
|
# define XFS_BIG_BLKNOS 0
|
|
# define XFS_BIG_INUMS 0
|
|
#endif
|
|
|
|
#include <xfs_types.h>
|
|
#include <xfs_arch.h>
|
|
|
|
#include <kmem.h>
|
|
#include <mrlock.h>
|
|
#include <sv.h>
|
|
#include <mutex.h>
|
|
#include <sema.h>
|
|
#include <time.h>
|
|
|
|
#include <support/ktrace.h>
|
|
#include <support/debug.h>
|
|
#include <support/uuid.h>
|
|
|
|
#include <linux/mm.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/blkdev.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/module.h>
|
|
#include <linux/file.h>
|
|
#include <linux/swap.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/major.h>
|
|
#include <linux/pagemap.h>
|
|
#include <linux/vfs.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/init.h>
|
|
#include <linux/list.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/sort.h>
|
|
#include <linux/cpu.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/log2.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
#include <asm/page.h>
|
|
#include <asm/div64.h>
|
|
#include <asm/param.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/byteorder.h>
|
|
#include <asm/unaligned.h>
|
|
|
|
#include <xfs_vfs.h>
|
|
#include <xfs_cred.h>
|
|
#include <xfs_vnode.h>
|
|
#include <xfs_stats.h>
|
|
#include <xfs_sysctl.h>
|
|
#include <xfs_iops.h>
|
|
#include <xfs_aops.h>
|
|
#include <xfs_super.h>
|
|
#include <xfs_globals.h>
|
|
#include <xfs_fs_subr.h>
|
|
#include <xfs_lrw.h>
|
|
#include <xfs_buf.h>
|
|
|
|
/*
|
|
* Feature macros (disable/enable)
|
|
*/
|
|
#undef HAVE_REFCACHE /* reference cache not needed for NFS in 2.6 */
|
|
#define HAVE_SPLICE /* a splice(2) exists in 2.6, but not in 2.4 */
|
|
#ifdef CONFIG_SMP
|
|
#define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
|
|
#else
|
|
#undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
|
|
#endif
|
|
|
|
#define restricted_chown xfs_params.restrict_chown.val
|
|
#define irix_sgid_inherit xfs_params.sgid_inherit.val
|
|
#define irix_symlink_mode xfs_params.symlink_mode.val
|
|
#define xfs_panic_mask xfs_params.panic_mask.val
|
|
#define xfs_error_level xfs_params.error_level.val
|
|
#define xfs_syncd_centisecs xfs_params.syncd_timer.val
|
|
#define xfs_stats_clear xfs_params.stats_clear.val
|
|
#define xfs_inherit_sync xfs_params.inherit_sync.val
|
|
#define xfs_inherit_nodump xfs_params.inherit_nodump.val
|
|
#define xfs_inherit_noatime xfs_params.inherit_noatim.val
|
|
#define xfs_buf_timer_centisecs xfs_params.xfs_buf_timer.val
|
|
#define xfs_buf_age_centisecs xfs_params.xfs_buf_age.val
|
|
#define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val
|
|
#define xfs_rotorstep xfs_params.rotorstep.val
|
|
#define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val
|
|
#define xfs_fstrm_centisecs xfs_params.fstrm_timer.val
|
|
|
|
#define current_cpu() (raw_smp_processor_id())
|
|
#define current_pid() (current->pid)
|
|
#define current_fsuid(cred) (current->fsuid)
|
|
#define current_fsgid(cred) (current->fsgid)
|
|
#define current_test_flags(f) (current->flags & (f))
|
|
#define current_set_flags_nested(sp, f) \
|
|
(*(sp) = current->flags, current->flags |= (f))
|
|
#define current_clear_flags_nested(sp, f) \
|
|
(*(sp) = current->flags, current->flags &= ~(f))
|
|
#define current_restore_flags_nested(sp, f) \
|
|
(current->flags = ((current->flags & ~(f)) | (*(sp) & (f))))
|
|
|
|
#define spinlock_destroy(lock)
|
|
|
|
#define NBPP PAGE_SIZE
|
|
#define NDPP (1 << (PAGE_SHIFT - 9))
|
|
|
|
#define NBBY 8 /* number of bits per byte */
|
|
#define NBPC PAGE_SIZE /* Number of bytes per click */
|
|
#define BPCSHIFT PAGE_SHIFT /* LOG2(NBPC) if exact */
|
|
|
|
/*
|
|
* Size of block device i/o is parameterized here.
|
|
* Currently the system supports page-sized i/o.
|
|
*/
|
|
#define BLKDEV_IOSHIFT BPCSHIFT
|
|
#define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT)
|
|
/* number of BB's per block device block */
|
|
#define BLKDEV_BB BTOBB(BLKDEV_IOSIZE)
|
|
|
|
/* bytes to clicks */
|
|
#define btoc(x) (((__psunsigned_t)(x)+(NBPC-1))>>BPCSHIFT)
|
|
#define btoct(x) ((__psunsigned_t)(x)>>BPCSHIFT)
|
|
#define btoc64(x) (((__uint64_t)(x)+(NBPC-1))>>BPCSHIFT)
|
|
#define btoct64(x) ((__uint64_t)(x)>>BPCSHIFT)
|
|
|
|
/* off_t bytes to clicks */
|
|
#define offtoc(x) (((__uint64_t)(x)+(NBPC-1))>>BPCSHIFT)
|
|
#define offtoct(x) ((xfs_off_t)(x)>>BPCSHIFT)
|
|
|
|
/* clicks to off_t bytes */
|
|
#define ctooff(x) ((xfs_off_t)(x)<<BPCSHIFT)
|
|
|
|
/* clicks to bytes */
|
|
#define ctob(x) ((__psunsigned_t)(x)<<BPCSHIFT)
|
|
#define btoct(x) ((__psunsigned_t)(x)>>BPCSHIFT)
|
|
#define ctob64(x) ((__uint64_t)(x)<<BPCSHIFT)
|
|
|
|
/* bytes to clicks */
|
|
#define btoc(x) (((__psunsigned_t)(x)+(NBPC-1))>>BPCSHIFT)
|
|
|
|
#define ENOATTR ENODATA /* Attribute not found */
|
|
#define EWRONGFS EINVAL /* Mount with wrong filesystem type */
|
|
#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
|
|
|
|
#define SYNCHRONIZE() barrier()
|
|
#define __return_address __builtin_return_address(0)
|
|
|
|
/*
|
|
* IRIX (BSD) quotactl makes use of separate commands for user/group,
|
|
* whereas on Linux the syscall encodes this information into the cmd
|
|
* field (see the QCMD macro in quota.h). These macros help keep the
|
|
* code portable - they are not visible from the syscall interface.
|
|
*/
|
|
#define Q_XSETGQLIM XQM_CMD(8) /* set groups disk limits */
|
|
#define Q_XGETGQUOTA XQM_CMD(9) /* get groups disk limits */
|
|
#define Q_XSETPQLIM XQM_CMD(10) /* set projects disk limits */
|
|
#define Q_XGETPQUOTA XQM_CMD(11) /* get projects disk limits */
|
|
|
|
#define dfltprid 0
|
|
#define MAXPATHLEN 1024
|
|
|
|
#define MIN(a,b) (min(a,b))
|
|
#define MAX(a,b) (max(a,b))
|
|
#define howmany(x, y) (((x)+((y)-1))/(y))
|
|
|
|
/*
|
|
* Various platform dependent calls that don't fit anywhere else
|
|
*/
|
|
#define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL)
|
|
#define xfs_stack_trace() dump_stack()
|
|
#define xfs_itruncate_data(ip, off) \
|
|
(-vmtruncate(vn_to_inode(XFS_ITOV(ip)), (off)))
|
|
|
|
|
|
/* Move the kernel do_div definition off to one side */
|
|
|
|
#if defined __i386__
|
|
/* For ia32 we need to pull some tricks to get past various versions
|
|
* of the compiler which do not like us using do_div in the middle
|
|
* of large functions.
|
|
*/
|
|
static inline __u32 xfs_do_div(void *a, __u32 b, int n)
|
|
{
|
|
__u32 mod;
|
|
|
|
switch (n) {
|
|
case 4:
|
|
mod = *(__u32 *)a % b;
|
|
*(__u32 *)a = *(__u32 *)a / b;
|
|
return mod;
|
|
case 8:
|
|
{
|
|
unsigned long __upper, __low, __high, __mod;
|
|
__u64 c = *(__u64 *)a;
|
|
__upper = __high = c >> 32;
|
|
__low = c;
|
|
if (__high) {
|
|
__upper = __high % (b);
|
|
__high = __high / (b);
|
|
}
|
|
asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
|
|
asm("":"=A" (c):"a" (__low),"d" (__high));
|
|
*(__u64 *)a = c;
|
|
return __mod;
|
|
}
|
|
}
|
|
|
|
/* NOTREACHED */
|
|
return 0;
|
|
}
|
|
|
|
/* Side effect free 64 bit mod operation */
|
|
static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
|
|
{
|
|
switch (n) {
|
|
case 4:
|
|
return *(__u32 *)a % b;
|
|
case 8:
|
|
{
|
|
unsigned long __upper, __low, __high, __mod;
|
|
__u64 c = *(__u64 *)a;
|
|
__upper = __high = c >> 32;
|
|
__low = c;
|
|
if (__high) {
|
|
__upper = __high % (b);
|
|
__high = __high / (b);
|
|
}
|
|
asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
|
|
asm("":"=A" (c):"a" (__low),"d" (__high));
|
|
return __mod;
|
|
}
|
|
}
|
|
|
|
/* NOTREACHED */
|
|
return 0;
|
|
}
|
|
#else
|
|
static inline __u32 xfs_do_div(void *a, __u32 b, int n)
|
|
{
|
|
__u32 mod;
|
|
|
|
switch (n) {
|
|
case 4:
|
|
mod = *(__u32 *)a % b;
|
|
*(__u32 *)a = *(__u32 *)a / b;
|
|
return mod;
|
|
case 8:
|
|
mod = do_div(*(__u64 *)a, b);
|
|
return mod;
|
|
}
|
|
|
|
/* NOTREACHED */
|
|
return 0;
|
|
}
|
|
|
|
/* Side effect free 64 bit mod operation */
|
|
static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
|
|
{
|
|
switch (n) {
|
|
case 4:
|
|
return *(__u32 *)a % b;
|
|
case 8:
|
|
{
|
|
__u64 c = *(__u64 *)a;
|
|
return do_div(c, b);
|
|
}
|
|
}
|
|
|
|
/* NOTREACHED */
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#undef do_div
|
|
#define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a))
|
|
#define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a))
|
|
|
|
static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y)
|
|
{
|
|
x += y - 1;
|
|
do_div(x, y);
|
|
return(x * y);
|
|
}
|
|
|
|
static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y)
|
|
{
|
|
x += y - 1;
|
|
do_div(x, y);
|
|
return x;
|
|
}
|
|
|
|
#endif /* __XFS_LINUX__ */
|