/*
* 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_IALLOC_H__
#define __XFS_IALLOC_H__
struct xfs_buf;
struct xfs_dinode;
struct xfs_imap;
struct xfs_mount;
struct xfs_trans;
struct xfs_btree_cur;
/* Move inodes in clusters of this size */
#define XFS_INODE_BIG_CLUSTER_SIZE 8192
struct xfs_icluster {
bool deleted; /* record is deleted */
xfs_ino_t first_ino; /* first inode number */
uint64_t alloc; /* inode phys. allocation bitmap for
* sparse chunks */
};
/* Calculate and return the number of filesystem blocks per inode cluster */
static inline int
xfs_icluster_size_fsb(
struct xfs_mount *mp)
{
if (mp->m_sb.sb_blocksize >= mp->m_inode_cluster_size)
return 1;
return mp->m_inode_cluster_size >> mp->m_sb.sb_blocklog;
}
/*
* Make an inode pointer out of the buffer/offset.
*/
static inline struct xfs_dinode *
xfs_make_iptr(struct xfs_mount *mp, struct xfs_buf *b, int o)
{
return xfs_buf_offset(b, o << (mp)->m_sb.sb_inodelog);
}
/*
* Allocate an inode on disk.
* Mode is used to tell whether the new inode will need space, and whether
* it is a directory.
*
* To work within the constraint of one allocation per transaction,
* xfs_dialloc() is designed to be called twice if it has to do an
* allocation to make more free inodes. If an inode is
* available without an allocation, agbp would be set to the current
* agbp and alloc_done set to false.
* If an allocation needed to be done, agbp would be set to the
* inode header of the allocation group and alloc_done set to true.
* The caller should then commit the current transaction and allocate a new
* transaction. xfs_dialloc() should then be called again with
* the agbp value returned from the previous call.
*
* Once we successfully pick an inode its number is returned and the
* on-disk data structures are updated. The inode itself is not read
* in, since doing so would break ordering constraints with xfs_reclaim.
*
* *agbp should be set to NULL on the first call, *alloc_done set to FALSE.
*/
int /* error */
xfs_dialloc(
struct xfs_trans *tp, /* transaction pointer */
xfs_ino_t parent, /* parent inode (directory) */
umode_t mode, /* mode bits for new inode */
int okalloc, /* ok to allocate more space */
struct xfs_buf **agbp, /* buf for a.g. inode header */
xfs_ino_t *inop); /* inode number allocated */
/*
* Free disk inode. Carefully avoids touching the incore inode, all
* manipulations incore are the caller's responsibility.
* The on-disk inode is not changed by this operation, only the
* btree (free inode mask) is changed.
*/
int /* error */
xfs_difree(
struct xfs_trans *tp, /* transaction pointer */
xfs_ino_t inode, /* inode to be freed */
struct xfs_defer_ops *dfops, /* extents to free */
struct xfs_icluster *ifree); /* cluster info if deleted */
/*
* Return the location of the inode in imap, for mapping it into a buffer.
*/
int
xfs_imap(
struct xfs_mount *mp, /* file system mount structure */
struct xfs_trans *tp, /* transaction pointer */
xfs_ino_t ino, /* inode to locate */
struct xfs_imap *imap, /* location map structure */
uint flags); /* flags for inode btree lookup */
/*
* Compute and fill in value of m_in_maxlevels.
*/
void
xfs_ialloc_compute_maxlevels(
struct xfs_mount *mp); /* file system mount structure */
/*
* Log specified fields for the ag hdr (inode section)
*/
void
xfs_ialloc_log_agi(
struct xfs_trans *tp, /* transaction pointer */
struct xfs_buf *bp, /* allocation group header buffer */
int fields); /* bitmask of fields to log */
/*
* Read in the allocation group header (inode allocation section)
*/
int /* error */
xfs_ialloc_read_agi(
struct xfs_mount *mp, /* file system mount structure */
struct xfs_trans *tp, /* transaction pointer */
xfs_agnumber_t agno, /* allocation group number */
struct xfs_buf **bpp); /* allocation group hdr buf */
/*
* Read in the allocation group header to initialise the per-ag data
* in the mount structure
*/
int
xfs_ialloc_pagi_init(
struct xfs_mount *mp, /* file system mount structure */
struct xfs_trans *tp, /* transaction pointer */
xfs_agnumber_t agno); /* allocation group number */
/*
* Lookup a record by ino in the btree given by cur.
*/
int xfs_inobt_lookup(struct xfs_btree_cur *cur, xfs_agino_t ino,
xfs_lookup_t dir, int *stat);
/*
* Get the data from the pointed-to record.
*/
int xfs_inobt_get_rec(struct xfs_btree_cur *cur,
xfs_inobt_rec_incore_t *rec, int *stat);
/*
* Inode chunk initialisation routine
*/
int xfs_ialloc_inode_init(struct xfs_mount *mp, struct xfs_trans *tp,
struct list_head *buffer_list, int icount,
xfs_agnumber_t agno, xfs_agblock_t agbno,
xfs_agblock_t length, unsigned int gen);
int xfs_read_agi(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_agnumber_t agno, struct xfs_buf **bpp);
#endif /* __XFS_IALLOC_H__ */
4b36280608e296cba39b924b6e832b'>patch)
| tree | 6e21b4b3d8e8fb12cdfcfd185d46992487265a9b /tools/testing/selftests |
|---|
| parent | 19ca2c8fecb1592d623fe5e82d6796f8d446268d (diff) |
|---|
| parent | 7b9e1d89e1b6a3b99a8fdd949aa0f98dd5bf2f6b (diff) |
|---|
Merge tag 'platform-drivers-x86-v4.10-4' of git://git.infradead.org/linux-platform-drivers-x86
Pull x86 platform-driver fixes from Andy Shevchenko:
"This is my first pull request since I become a co-maintainer of
Platform Drivers x86 subsystem. It's a bit bigger than usual due to
material collected for almost two weeks in a row.
MAINTAINERS:
- Add myself to X86 PLATFORM DRIVERS as a co-maintainer
ideapad-laptop:
- handle ACPI event 1
intel_mid_powerbtn:
- Set IRQ_ONESHOT
surface3-wmi:
- fix uninitialized symbol
- Shut up unused-function warning
mlx-platform:
- free first dev on error"
* tag 'platform-drivers-x86-v4.10-4' of git://git.infradead.org/linux-platform-drivers-x86:
MAINTAINERS: Add myself to X86 PLATFORM DRIVERS as a co-maintainer
platform/x86: ideapad-laptop: handle ACPI event 1
platform/x86: intel_mid_powerbtn: Set IRQ_ONESHOT
platform/x86: surface3-wmi: fix uninitialized symbol
platform/x86: surface3-wmi: Shut up unused-function warning
platform/x86: mlx-platform: free first dev on error