mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 23:53:55 +08:00
71ddabb94a
Use XFS_IS_REALTIME_INODE in more places, and #define it to 0 if CONFIG_XFS_RT is off. This should be safe because mount checks in xfs_rtmount_init: so if we get mounted w/o CONFIG_XFS_RT, no realtime inodes should be encountered after that. Defining XFS_IS_REALTIME_INODE to 0 saves a bit of stack space, presumeably gcc can optimize around the various "if (0)" type checks: xfs_alloc_file_space -8 xfs_bmap_adjacent -16 xfs_bmapi -8 xfs_bmap_rtalloc -16 xfs_bunmapi -28 xfs_free_file_space -64 xfs_imap +8 <-- ? hmm. xfs_iomap_write_direct -12 xfs_qm_dqusage_adjust -4 xfs_qm_vop_chown_reserve -4 SGI-PV: 971186 SGI-Modid: xfs-linux-melb:xfs-kern:30014a Signed-off-by: Eric Sandeen <sandeen@sandeen.net> Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
154 lines
5.0 KiB
C
154 lines
5.0 KiB
C
/*
|
|
* Copyright (c) 2000-2003,2005 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_RTALLOC_H__
|
|
#define __XFS_RTALLOC_H__
|
|
|
|
struct xfs_mount;
|
|
struct xfs_trans;
|
|
|
|
/* Min and max rt extent sizes, specified in bytes */
|
|
#define XFS_MAX_RTEXTSIZE (1024 * 1024 * 1024) /* 1GB */
|
|
#define XFS_DFL_RTEXTSIZE (64 * 1024) /* 64KB */
|
|
#define XFS_MIN_RTEXTSIZE (4 * 1024) /* 4KB */
|
|
|
|
/*
|
|
* Constants for bit manipulations.
|
|
*/
|
|
#define XFS_NBBYLOG 3 /* log2(NBBY) */
|
|
#define XFS_WORDLOG 2 /* log2(sizeof(xfs_rtword_t)) */
|
|
#define XFS_NBWORDLOG (XFS_NBBYLOG + XFS_WORDLOG)
|
|
#define XFS_NBWORD (1 << XFS_NBWORDLOG)
|
|
#define XFS_WORDMASK ((1 << XFS_WORDLOG) - 1)
|
|
|
|
#define XFS_BLOCKSIZE(mp) ((mp)->m_sb.sb_blocksize)
|
|
#define XFS_BLOCKMASK(mp) ((mp)->m_blockmask)
|
|
#define XFS_BLOCKWSIZE(mp) ((mp)->m_blockwsize)
|
|
#define XFS_BLOCKWMASK(mp) ((mp)->m_blockwmask)
|
|
|
|
/*
|
|
* Summary and bit manipulation macros.
|
|
*/
|
|
#define XFS_SUMOFFS(mp,ls,bb) ((int)((ls) * (mp)->m_sb.sb_rbmblocks + (bb)))
|
|
#define XFS_SUMOFFSTOBLOCK(mp,s) \
|
|
(((s) * (uint)sizeof(xfs_suminfo_t)) >> (mp)->m_sb.sb_blocklog)
|
|
#define XFS_SUMPTR(mp,bp,so) \
|
|
((xfs_suminfo_t *)((char *)XFS_BUF_PTR(bp) + \
|
|
(((so) * (uint)sizeof(xfs_suminfo_t)) & XFS_BLOCKMASK(mp))))
|
|
|
|
#define XFS_BITTOBLOCK(mp,bi) ((bi) >> (mp)->m_blkbit_log)
|
|
#define XFS_BLOCKTOBIT(mp,bb) ((bb) << (mp)->m_blkbit_log)
|
|
#define XFS_BITTOWORD(mp,bi) \
|
|
((int)(((bi) >> XFS_NBWORDLOG) & XFS_BLOCKWMASK(mp)))
|
|
|
|
#define XFS_RTMIN(a,b) ((a) < (b) ? (a) : (b))
|
|
#define XFS_RTMAX(a,b) ((a) > (b) ? (a) : (b))
|
|
|
|
#define XFS_RTLOBIT(w) xfs_lowbit32(w)
|
|
#define XFS_RTHIBIT(w) xfs_highbit32(w)
|
|
|
|
#if XFS_BIG_BLKNOS
|
|
#define XFS_RTBLOCKLOG(b) xfs_highbit64(b)
|
|
#else
|
|
#define XFS_RTBLOCKLOG(b) xfs_highbit32(b)
|
|
#endif
|
|
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#ifdef CONFIG_XFS_RT
|
|
/*
|
|
* Function prototypes for exported functions.
|
|
*/
|
|
|
|
/*
|
|
* Allocate an extent in the realtime subvolume, with the usual allocation
|
|
* parameters. The length units are all in realtime extents, as is the
|
|
* result block number.
|
|
*/
|
|
int /* error */
|
|
xfs_rtallocate_extent(
|
|
struct xfs_trans *tp, /* transaction pointer */
|
|
xfs_rtblock_t bno, /* starting block number to allocate */
|
|
xfs_extlen_t minlen, /* minimum length to allocate */
|
|
xfs_extlen_t maxlen, /* maximum length to allocate */
|
|
xfs_extlen_t *len, /* out: actual length allocated */
|
|
xfs_alloctype_t type, /* allocation type XFS_ALLOCTYPE... */
|
|
int wasdel, /* was a delayed allocation extent */
|
|
xfs_extlen_t prod, /* extent product factor */
|
|
xfs_rtblock_t *rtblock); /* out: start block allocated */
|
|
|
|
/*
|
|
* Free an extent in the realtime subvolume. Length is expressed in
|
|
* realtime extents, as is the block number.
|
|
*/
|
|
int /* error */
|
|
xfs_rtfree_extent(
|
|
struct xfs_trans *tp, /* transaction pointer */
|
|
xfs_rtblock_t bno, /* starting block number to free */
|
|
xfs_extlen_t len); /* length of extent freed */
|
|
|
|
/*
|
|
* Initialize realtime fields in the mount structure.
|
|
*/
|
|
int /* error */
|
|
xfs_rtmount_init(
|
|
struct xfs_mount *mp); /* file system mount structure */
|
|
|
|
/*
|
|
* Get the bitmap and summary inodes into the mount structure
|
|
* at mount time.
|
|
*/
|
|
int /* error */
|
|
xfs_rtmount_inodes(
|
|
struct xfs_mount *mp); /* file system mount structure */
|
|
|
|
/*
|
|
* Pick an extent for allocation at the start of a new realtime file.
|
|
* Use the sequence number stored in the atime field of the bitmap inode.
|
|
* Translate this to a fraction of the rtextents, and return the product
|
|
* of rtextents and the fraction.
|
|
* The fraction sequence is 0, 1/2, 1/4, 3/4, 1/8, ..., 7/8, 1/16, ...
|
|
*/
|
|
int /* error */
|
|
xfs_rtpick_extent(
|
|
struct xfs_mount *mp, /* file system mount point */
|
|
struct xfs_trans *tp, /* transaction pointer */
|
|
xfs_extlen_t len, /* allocation length (rtextents) */
|
|
xfs_rtblock_t *pick); /* result rt extent */
|
|
|
|
/*
|
|
* Grow the realtime area of the filesystem.
|
|
*/
|
|
int
|
|
xfs_growfs_rt(
|
|
struct xfs_mount *mp, /* file system mount structure */
|
|
xfs_growfs_rt_t *in); /* user supplied growfs struct */
|
|
|
|
#else
|
|
# define xfs_rtallocate_extent(t,b,min,max,l,a,f,p,rb) (ENOSYS)
|
|
# define xfs_rtfree_extent(t,b,l) (ENOSYS)
|
|
# define xfs_rtpick_extent(m,t,l,rb) (ENOSYS)
|
|
# define xfs_growfs_rt(mp,in) (ENOSYS)
|
|
# define xfs_rtmount_init(m) (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS))
|
|
# define xfs_rtmount_inodes(m) (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS))
|
|
#endif /* CONFIG_XFS_RT */
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* __XFS_RTALLOC_H__ */
|