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xfs: add XFS_IOC_FREE_EOFBLOCKS ioctl

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The XFS_IOC_FREE_EOFBLOCKS ioctl allows users to invoke an EOFBLOCKS
scan. The xfs_eofblocks structure is defined to support the command
parameters (scan mode).

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Brian Foster 2012-11-07 12:21:12 -05:00 committed by Ben Myers
parent 41176a68e3
commit 8ca149de80
4 changed files with 45 additions and 4 deletions
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17
fs/xfs/xfs_fs.h
View File

@ -339,6 +339,22 @@ typedef struct xfs_error_injection {
} xfs_error_injection_t;
/*
* Speculative preallocation trimming.
*/
#define XFS_EOFBLOCKS_VERSION 1
struct xfs_eofblocks {
__u32 eof_version;
__u32 eof_flags;
__u64 pad[15];
};
/* eof_flags values */
#define XFS_EOF_FLAGS_SYNC (1 << 0) /* sync/wait mode scan */
#define XFS_EOF_FLAGS_VALID \
(XFS_EOF_FLAGS_SYNC)
/*
* The user-level Handle Request interface structure.
*/
@ -457,6 +473,7 @@ typedef struct xfs_handle {
/* XFS_IOC_GETBIOSIZE ---- deprecated 47 */
#define XFS_IOC_GETBMAPX _IOWR('X', 56, struct getbmap)
#define XFS_IOC_ZERO_RANGE _IOW ('X', 57, struct xfs_flock64)
#define XFS_IOC_FREE_EOFBLOCKS _IOR ('X', 58, struct xfs_eofblocks)
/*
* ioctl commands that replace IRIX syssgi()'s

10
fs/xfs/xfs_icache.c
View File

@ -1206,11 +1206,15 @@ xfs_inode_free_eofblocks(
int
xfs_icache_free_eofblocks(
struct xfs_mount *mp,
int flags)
struct xfs_eofblocks *eofb)
{
ASSERT((flags & ~(SYNC_TRYLOCK|SYNC_WAIT)) == 0);
int flags = SYNC_TRYLOCK;
if (eofb && (eofb->eof_flags & XFS_EOF_FLAGS_SYNC))
flags = SYNC_WAIT;
return xfs_inode_ag_iterator_tag(mp, xfs_inode_free_eofblocks, flags,
NULL, XFS_ICI_EOFBLOCKS_TAG);
eofb, XFS_ICI_EOFBLOCKS_TAG);
}
void

2
fs/xfs/xfs_icache.h
View File

@ -37,7 +37,7 @@ void xfs_inode_set_reclaim_tag(struct xfs_inode *ip);
void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip);
void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip);
int xfs_icache_free_eofblocks(struct xfs_mount *, int);
int xfs_icache_free_eofblocks(struct xfs_mount *, struct xfs_eofblocks *);
int xfs_sync_inode_grab(struct xfs_inode *ip);
int xfs_inode_ag_iterator(struct xfs_mount *mp,

20
fs/xfs/xfs_ioctl.c
View File

@ -42,6 +42,7 @@
#include "xfs_inode_item.h"
#include "xfs_export.h"
#include "xfs_trace.h"
#include "xfs_icache.h"
#include <linux/capability.h>
#include <linux/dcache.h>
@ -1602,6 +1603,25 @@ xfs_file_ioctl(
error = xfs_errortag_clearall(mp, 1);
return -error;
case XFS_IOC_FREE_EOFBLOCKS: {
struct xfs_eofblocks eofb;
if (copy_from_user(&eofb, arg, sizeof(eofb)))
return -XFS_ERROR(EFAULT);
if (eofb.eof_version != XFS_EOFBLOCKS_VERSION)
return -XFS_ERROR(EINVAL);
if (eofb.eof_flags & ~XFS_EOF_FLAGS_VALID)
return -XFS_ERROR(EINVAL);
if (memchr_inv(eofb.pad, 0, sizeof(eofb.pad)))
return -XFS_ERROR(EINVAL);
error = xfs_icache_free_eofblocks(mp, &eofb);
return -error;
}
default:
return -ENOTTY;
}