[PATCH v4 5/7] xfs: create internal eofblocks structure with kuid_t types

[Dwight Engen <dwight.engen@xxxxxxxxxx>]

Have eofblocks ioctl convert uid_t to kuid_t into internal structure.
Update internal filter matching to compare ids with kuid_t types.

Signed-off-by: Dwight Engen <dwight.engen@xxxxxxxxxx>
---
 fs/xfs/xfs_fs.h     |  2 +-
 fs/xfs/xfs_icache.c |  6 +++---
 fs/xfs/xfs_icache.h | 20 ++++++++++++++++++++
 fs/xfs/xfs_ioctl.c  | 15 +++++++++++++--
 4 files changed, 37 insertions(+), 6 deletions(-)

diff --git a/fs/xfs/xfs_fs.h b/fs/xfs/xfs_fs.h
index d046955..7eb4a5e 100644
--- a/fs/xfs/xfs_fs.h
+++ b/fs/xfs/xfs_fs.h
@@ -344,7 +344,7 @@ typedef struct xfs_error_injection {
  * Speculative preallocation trimming.
  */
 #define XFS_EOFBLOCKS_VERSION          1
-struct xfs_eofblocks {
+struct xfs_fs_eofblocks {
        __u32           eof_version;
        __u32           eof_flags;
        uid_t           eof_uid;
diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index 3f90e1c..d873ab9e 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -619,7 +619,7 @@ restart:
 
 /*
  * Background scanning to trim post-EOF preallocated space. This is queued
- * based on the 'background_prealloc_discard_period' tunable (5m by default).
+ * based on the 'speculative_prealloc_lifetime' tunable (5m by default).
  */
 STATIC void
 xfs_queue_eofblocks(
@@ -1204,11 +1204,11 @@ xfs_inode_match_id(
        struct xfs_eofblocks    *eofb)
 {
        if (eofb->eof_flags & XFS_EOF_FLAGS_UID &&
-           ip->i_d.di_uid != eofb->eof_uid)
+           !uid_eq(VFS_I(ip)->i_uid, eofb->eof_uid))
                return 0;
 
        if (eofb->eof_flags & XFS_EOF_FLAGS_GID &&
-           ip->i_d.di_gid != eofb->eof_gid)
+           !gid_eq(VFS_I(ip)->i_gid, eofb->eof_gid))
                return 0;
 
        if (eofb->eof_flags & XFS_EOF_FLAGS_PRID &&
diff --git a/fs/xfs/xfs_icache.h b/fs/xfs/xfs_icache.h
index a01afbb..6cce1e3 100644
--- a/fs/xfs/xfs_icache.h
+++ b/fs/xfs/xfs_icache.h
@@ -21,6 +21,14 @@
 struct xfs_mount;
 struct xfs_perag;
 
+struct xfs_eofblocks {
+       __u32           eof_flags;
+       kuid_t          eof_uid;
+       kgid_t          eof_gid;
+       prid_t          eof_prid;
+       __u64           eof_min_file_size;
+};
+
 #define SYNC_WAIT              0x0001  /* wait for i/o to complete */
 #define SYNC_TRYLOCK           0x0002  /* only try to lock inodes */
 
@@ -49,4 +57,16 @@ int xfs_inode_ag_iterator_tag(struct xfs_mount *mp,
                int flags, void *args),
        int flags, void *args, int tag);
 
+static inline void
+xfs_fs_eofblocks_to_internal(
+       struct xfs_fs_eofblocks         *src,
+       struct xfs_eofblocks            *dst)
+{
+       dst->eof_flags = src->eof_flags;
+       dst->eof_prid = src->eof_prid;
+       dst->eof_min_file_size = src->eof_min_file_size;
+       dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid);
+       dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid);
+}
+
 #endif
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 8edc780..abbbdcf 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -1610,7 +1610,8 @@ xfs_file_ioctl(
                return -error;
 
        case XFS_IOC_FREE_EOFBLOCKS: {
-               struct xfs_eofblocks eofb;
+               struct xfs_fs_eofblocks eofb;
+               struct xfs_eofblocks keofb;
 
                if (copy_from_user(&eofb, arg, sizeof(eofb)))
                        return -XFS_ERROR(EFAULT);
@@ -1625,7 +1626,17 @@ xfs_file_ioctl(
                    memchr_inv(eofb.pad64, 0, sizeof(eofb.pad64)))
                        return -XFS_ERROR(EINVAL);
 
-               error = xfs_icache_free_eofblocks(mp, &eofb);
+               xfs_fs_eofblocks_to_internal(&eofb, &keofb);
+
+               if (keofb.eof_flags & XFS_EOF_FLAGS_UID &&
+                   !uid_valid(keofb.eof_uid))
+                       return XFS_ERROR(EINVAL);
+
+               if (keofb.eof_flags & XFS_EOF_FLAGS_GID &&
+                   !gid_valid(keofb.eof_gid))
+                       return XFS_ERROR(EINVAL);
+
+               error = xfs_icache_free_eofblocks(mp, &keofb);
                return -error;
        }
 
-- 
1.8.1.4