[PATCH v4 7/8] xfs: add enhanced filtering to EOFBLOCKS scan

Brian Foster
2012-09-27T17:42:54Z

Support EOFBLOCKS scan filtering by quota ID or minimum file size.
Add the appropriate fields/flags to the xfs_eofblocks structure and
pass it down to xfs_inode_free_eofblocks() where filtering
functionality is implemented.

A (user requested) quota ID based scan requires the associated
quota mode be enabled.

Signed-off-by: Brian Foster <bfoster@redhat.com>
---
fs/xfs/xfs_fs.h | 9 +++++++++
fs/xfs/xfs_ioctl.c | 10 +++++++++-
fs/xfs/xfs_sync.c | 30 ++++++++++++++++++++++++++----
fs/xfs/xfs_sync.h | 2 +-
4 files changed, 45 insertions(+), 6 deletions(-)

diff --git a/fs/xfs/xfs_fs.h b/fs/xfs/xfs_fs.h
index 32bb2e8..54c0f39 100644
--- a/fs/xfs/xfs_fs.h
+++ b/fs/xfs/xfs_fs.h
@@ -343,12 +343,21 @@ typedef struct xfs_error_injection {
*/
struct xfs_eofblocks {
__u32 eof_flags;
+ __u32 eof_id;
+ __u64 eof_min_file_size;
__s32 version;
unsigned char pad[12];
};

/* eof_flags values */
#define XFS_EOF_FLAGS_FORCE 0x01 /* force/wait mode scan */
+#define XFS_EOF_FLAGS_USRID 0x02 /* filter by user id */
+#define XFS_EOF_FLAGS_GRPID 0x04 /* filter by group id */
+#define XFS_EOF_FLAGS_PROJID 0x08 /* filter by project id */
+#define XFS_EOF_FLAGS_MINFILESIZE 0x10 /* minimum file size */
+
+#define XFS_EOF_VALID_QUOTA (XFS_EOF_FLAGS_USRID|XFS_EOF_FLAGS_GRPID| \
+ XFS_EOF_FLAGS_PROJID)

/*
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 216ca7a..a7bf847 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -1609,8 +1609,16 @@ xfs_file_ioctl(
if (copy_from_user(&eofb, arg, sizeof(eofb)))
return -XFS_ERROR(EFAULT);

+ if (((eofb.eof_flags & XFS_EOF_FLAGS_USRID) &&
+ !XFS_IS_UQUOTA_ON(mp)) ||
+ ((eofb.eof_flags & XFS_EOF_FLAGS_GRPID) &&
+ !XFS_IS_GQUOTA_ON(mp)) ||
+ ((eofb.eof_flags & XFS_EOF_FLAGS_PROJID) &&
+ !XFS_IS_PQUOTA_ON(mp)))
+ return -XFS_ERROR(EINVAL);
+
flags = (eofb.eof_flags & XFS_EOF_FLAGS_FORCE) ? SYNC_WAIT : SYNC_TRYLOCK;
- error = xfs_inodes_free_eofblocks(mp, flags);
+ error = xfs_inodes_free_eofblocks(mp, flags, &eofb);
return -error;
}

diff --git a/fs/xfs/xfs_sync.c b/fs/xfs/xfs_sync.c
index 6854800..c9e1c16 100644
--- a/fs/xfs/xfs_sync.c
+++ b/fs/xfs/xfs_sync.c
@@ -1015,6 +1015,21 @@ xfs_reclaim_inodes_count(
}

STATIC int
+xfs_inode_match_quota_id(
+ struct xfs_inode *ip,
+ struct xfs_eofblocks *eofb)
+{
+ if (eofb->eof_flags & XFS_EOF_FLAGS_USRID)
+ return ip->i_d.di_uid == eofb->eof_id;
+ else if (eofb->eof_flags & XFS_EOF_FLAGS_GRPID)
+ return ip->i_d.di_gid == eofb->eof_id;
+ else if (eofb->eof_flags & XFS_EOF_FLAGS_PROJID)
+ return xfs_get_projid(ip) == eofb->eof_id;
+
+ return 0;
+}
+
+STATIC int
xfs_inode_free_eofblocks(
struct xfs_inode *ip,
struct xfs_perag *pag,
@@ -1022,6 +1037,7 @@ xfs_inode_free_eofblocks(
void *args)
{
int ret;
+ struct xfs_eofblocks *eofb = args;
bool force = flags & SYNC_WAIT;

if (!xfs_can_free_eofblocks(ip, false)) {
@@ -1031,8 +1047,13 @@ xfs_inode_free_eofblocks(
return 0;
}

- if (!force && mapping_tagged(VFS_I(ip)->i_mapping,
- PAGECACHE_TAG_DIRTY))
+ if ((eofb &&
+ (((eofb->eof_flags & XFS_EOF_VALID_QUOTA) &&
+ !xfs_inode_match_quota_id(ip, eofb)) ||
+ ((eofb->eof_flags & XFS_EOF_FLAGS_MINFILESIZE) &&
+ (XFS_ISIZE(ip) < eofb->eof_min_file_size)))) ||
+ (!force && mapping_tagged(VFS_I(ip)->i_mapping,
+ PAGECACHE_TAG_DIRTY)))
return 0;

ret = xfs_free_eofblocks(ip->i_mount, ip, true);
@@ -1047,11 +1068,12 @@ xfs_inode_free_eofblocks(
int
xfs_inodes_free_eofblocks(
struct xfs_mount *mp,
- int flags)
+ int flags,
+ struct xfs_eofblocks *eofb)
{
ASSERT((flags & ~(SYNC_TRYLOCK|SYNC_WAIT)) == 0);
return xfs_inode_ag_iterator_tag(mp, xfs_inode_free_eofblocks, flags,
- NULL, XFS_ICI_EOFBLOCKS_TAG);
+ eofb, XFS_ICI_EOFBLOCKS_TAG);
}

void
diff --git a/fs/xfs/xfs_sync.h b/fs/xfs/xfs_sync.h
index 307654a..167f06c 100644
--- a/fs/xfs/xfs_sync.h
+++ b/fs/xfs/xfs_sync.h
@@ -45,7 +45,7 @@ void __xfs_inode_clear_reclaim_tag(struct xfs_mount *mp, struct xfs_perag *pag,

void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip);
void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip);
-int xfs_inodes_free_eofblocks(struct xfs_mount *, int);
+int xfs_inodes_free_eofblocks(struct xfs_mount *, int, struct xfs_eofblocks *);

int xfs_sync_inode_grab(struct xfs_inode *ip);
int xfs_inode_ag_iterator(struct xfs_mount *mp,
--
1.7.7.6