xfs: add inode id filtering to eofblocks scan

Support inode ID filtering in the eofblocks scan. The caller must
set the associated XFS_EOF_FLAGS_*ID bit and ID field.

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>

1 files changed, 22 insertions, 0 deletions

diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index fbb74c715266..b239da91c43b 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -1171,6 +1171,21 @@ xfs_reclaim_inodes_count(
 }
 
 STATIC int
+xfs_inode_match_id(
+        struct xfs_inode        *ip,
+        struct xfs_eofblocks    *eofb)
+{
+        if (eofb->eof_flags & XFS_EOF_FLAGS_UID)
+                return ip->i_d.di_uid == eofb->eof_uid;
+        else if (eofb->eof_flags & XFS_EOF_FLAGS_GID)
+                return ip->i_d.di_gid == eofb->eof_gid;
+        else if (eofb->eof_flags & XFS_EOF_FLAGS_PRID)
+                return xfs_get_projid(ip) == eofb->eof_prid;
+
+        return 0;
+}
+
+STATIC int
 xfs_inode_free_eofblocks(
         struct xfs_inode        *ip,
         struct xfs_perag        *pag,
@@ -1178,6 +1193,7 @@ xfs_inode_free_eofblocks(
         void                    *args)
 {
         int ret;
+        struct xfs_eofblocks *eofb = args;
 
         if (!xfs_can_free_eofblocks(ip, false)) {
                 /* inode could be preallocated or append-only */
@@ -1194,6 +1210,12 @@ xfs_inode_free_eofblocks(
             mapping_tagged(VFS_I(ip)->i_mapping, PAGECACHE_TAG_DIRTY))
                 return 0;
 
+        if (eofb &&
+            (eofb->eof_flags & (XFS_EOF_FLAGS_UID|XFS_EOF_FLAGS_GID|
+                               XFS_EOF_FLAGS_PRID)) &&
+            !xfs_inode_match_id(ip, eofb))
+                return 0;
+
         ret = xfs_free_eofblocks(ip->i_mount, ip, true);
 
         /* don't revisit the inode if we're not waiting */