xfs: add minimum file size filtering to eofblocks scan

Support minimum file size filtering in the eofblocks scan. The
caller must set the XFS_EOF_FLAGS_MINFILESIZE flags bit and minimum
file size value in bytes.

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>

2 files changed, 14 insertions, 4 deletions

diff --git a/fs/xfs/xfs_fs.h b/fs/xfs/xfs_fs.h
index a19f9b205c15..6dda3f949b04 100644
--- a/fs/xfs/xfs_fs.h
+++ b/fs/xfs/xfs_fs.h
@@ -350,7 +350,8 @@ struct xfs_eofblocks {
         gid_t           eof_gid;
         prid_t          eof_prid;
         __u32           pad32;
-        __u64           pad64[13];
+        __u64           eof_min_file_size;
+        __u64           pad64[12];
 };
 
 /* eof_flags values */
@@ -358,11 +359,13 @@ struct xfs_eofblocks {
 #define XFS_EOF_FLAGS_UID               (1 << 1) /* filter by uid */
 #define XFS_EOF_FLAGS_GID               (1 << 2) /* filter by gid */
 #define XFS_EOF_FLAGS_PRID              (1 << 3) /* filter by project id */
+#define XFS_EOF_FLAGS_MINFILESIZE       (1 << 4) /* filter by min file size */
 #define XFS_EOF_FLAGS_VALID     \
         (XFS_EOF_FLAGS_SYNC |   \
          XFS_EOF_FLAGS_UID |    \
          XFS_EOF_FLAGS_GID |    \
-         XFS_EOF_FLAGS_PRID)
+         XFS_EOF_FLAGS_PRID |   \
+         XFS_EOF_FLAGS_MINFILESIZE)
 
 
 /*
diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index 32908909815e..906e6dcd2c55 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -1215,8 +1215,15 @@ xfs_inode_free_eofblocks(
             mapping_tagged(VFS_I(ip)->i_mapping, PAGECACHE_TAG_DIRTY))
                 return 0;
 
-        if (eofb && !xfs_inode_match_id(ip, eofb))
-                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);