Commit 8ca149de authored by Brian Foster's avatar Brian Foster Committed by Ben Myers
Browse files

xfs: add XFS_IOC_FREE_EOFBLOCKS ioctl 



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: default avatarBrian Foster <bfoster@redhat.com>
Reviewed-by: default avatarMark Tinguely <tinguely@sgi.com>
Reviewed-by: default avatarDave Chinner <dchinner@redhat.com>
Signed-off-by: default avatarBen Myers <bpm@sgi.com>
parent 41176a68

fs/xfs/xfs_fs.h

+17 −0
Original line number Diff line number Diff line
@@ -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

fs/xfs/xfs_icache.c

+7 −3
Original line number Diff line number Diff line
@@ -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

fs/xfs/xfs_icache.h

+1 −1
Original line number Diff line number Diff line
@@ -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,

fs/xfs/xfs_ioctl.c

+20 −0
Original line number Diff line number Diff line
@@ -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;

	}

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