STATIC int
xfs_inode_free_eofblocks(
struct xfs_inode *ip,
int flags,
void *args)
{
int ret;
struct xfs_eofblocks *eofb = args;
bool need_iolock = true;
int match;
ASSERT(!eofb || (eofb && eofb->eof_scan_owner != 0));
if (!xfs_can_free_eofblocks(ip, false)) {
/* inode could be preallocated or append-only */
trace_xfs_inode_free_eofblocks_invalid(ip);
xfs_inode_clear_eofblocks_tag(ip);
return 0;
}
/*
* If the mapping is dirty the operation can block and wait for some
* time. Unless we are waiting, skip it.
*/
if (!(flags & SYNC_WAIT) &&
mapping_tagged(VFS_I(ip)->i_mapping, PAGECACHE_TAG_DIRTY))
return 0;
if (eofb) {
if (eofb->eof_flags & XFS_EOF_FLAGS_UNION)
match = xfs_inode_match_id_union(ip, eofb);
else
match = xfs_inode_match_id(ip, eofb);
if (!match)
return 0;
/* skip the inode if the file size is too small */
if (eofb->eof_flags & XFS_EOF_FLAGS_MINFILESIZE &&
XFS_ISIZE(ip) < eofb->eof_min_file_size)
return 0;
/*
* A scan owner implies we already hold the iolock. Skip it in
* xfs_free_eofblocks() to avoid deadlock. This also eliminates
* the possibility of EAGAIN being returned.
*/
if (eofb->eof_scan_owner == ip->i_ino)
need_iolock = false;
}
ret = xfs_free_eofblocks(ip->i_mount, ip, need_iolock);
/* don't revisit the inode if we're not waiting */
if (ret == -EAGAIN && !(flags & SYNC_WAIT))
ret = 0;
return ret;
}
STATIC int
xfs_inode_free_eofblocks(
struct xfs_inode *ip,
int flags,
void *args)
{
int ret = 0;
struct xfs_eofblocks *eofb = args;
int match;
if (!xfs_can_free_eofblocks(ip, false)) {
/* inode could be preallocated or append-only */
trace_xfs_inode_free_eofblocks_invalid(ip);
xfs_inode_clear_eofblocks_tag(ip);
return 0;
}
/*
* If the mapping is dirty the operation can block and wait for some
* time. Unless we are waiting, skip it.
*/
if (!(flags & SYNC_WAIT) &&
mapping_tagged(VFS_I(ip)->i_mapping, PAGECACHE_TAG_DIRTY))
return 0;
if (eofb) {
if (eofb->eof_flags & XFS_EOF_FLAGS_UNION)
match = xfs_inode_match_id_union(ip, eofb);
else
match = xfs_inode_match_id(ip, eofb);
if (!match)
return 0;
/* skip the inode if the file size is too small */
if (eofb->eof_flags & XFS_EOF_FLAGS_MINFILESIZE &&
XFS_ISIZE(ip) < eofb->eof_min_file_size)
return 0;
}
/*
* If the caller is waiting, return -EAGAIN to keep the background
* scanner moving and revisit the inode in a subsequent pass.
*/
if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) {
if (flags & SYNC_WAIT)
ret = -EAGAIN;
return ret;
}
ret = xfs_free_eofblocks(ip);
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
return ret;
}
STATIC int
xfs_inode_free_eofblocks(
struct xfs_inode *ip,
struct xfs_perag *pag,
int flags,
void *args)
{
int ret;
struct xfs_eofblocks *eofb = args;
if (!xfs_can_free_eofblocks(ip, false)) {
/* inode could be preallocated or append-only */
trace_xfs_inode_free_eofblocks_invalid(ip);
xfs_inode_clear_eofblocks_tag(ip);
return 0;
}
/*
* If the mapping is dirty the operation can block and wait for some
* time. Unless we are waiting, skip it.
*/
if (!(flags & SYNC_WAIT) &&
mapping_tagged(VFS_I(ip)->i_mapping, PAGECACHE_TAG_DIRTY))
return 0;
if (eofb) {
if (!xfs_inode_match_id(ip, eofb))
return 0;
/* skip the inode if the file size is too small */
if (eofb->eof_flags & XFS_EOF_FLAGS_MINFILESIZE &&
XFS_ISIZE(ip) < eofb->eof_min_file_size)
return 0;
}
ret = xfs_free_eofblocks(ip->i_mount, ip, true);
/* don't revisit the inode if we're not waiting */
if (ret == EAGAIN && !(flags & SYNC_WAIT))
ret = 0;
return ret;
}
