tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: dc90c923fed4944f134644261022885c12631518 commit: 8c6e9756375dff2e96d3b598992b2f0e8b3682ee [2687/2687] xfs: fix xfs shutdown since we reserve more blocks in agfl fixup config: x86_64-buildonly-randconfig-2004-20250818 (https://download.01.org/0day-ci/archive/20250818/202508181555.TtWAnl9S-lkp@i...) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250818/202508181555.TtWAnl9S-lkp@i...) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202508181555.TtWAnl9S-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from fs/xfs/libxfs/xfs_alloc.c:6: In file included from fs/xfs/xfs.h:22: In file included from fs/xfs/xfs_linux.h:24: In file included from fs/xfs/kmem.h:11: In file included from include/linux/mm.h:2181: include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 522 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~

...

fs/xfs/libxfs/xfs_alloc.c:102:1: warning: no previous prototype for function 'xfs_ag_fixup_aside' [-Wmissing-prototypes] 102 | xfs_ag_fixup_aside( | ^ fs/xfs/libxfs/xfs_alloc.c:101:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 101 | xfs_extlen_t | ^ | static 2 warnings generated.

vim +/xfs_ag_fixup_aside +102 fs/xfs/libxfs/xfs_alloc.c

6 #include "xfs.h" 7 #include "xfs_fs.h" 8 #include "xfs_format.h" 9 #include "xfs_log_format.h" 10 #include "xfs_shared.h" 11 #include "xfs_trans_resv.h" 12 #include "xfs_bit.h" 13 #include "xfs_mount.h" 14 #include "xfs_defer.h" 15 #include "xfs_btree.h" 16 #include "xfs_rmap.h" 17 #include "xfs_alloc_btree.h" 18 #include "xfs_alloc.h" 19 #include "xfs_extent_busy.h" 20 #include "xfs_errortag.h" 21 #include "xfs_error.h" 22 #include "xfs_trace.h" 23 #include "xfs_trans.h" 24 #include "xfs_buf_item.h" 25 #include "xfs_log.h" 26 #include "xfs_ag.h" 27 #include "xfs_ag_resv.h" 28 #include "xfs_bmap.h" 29 30 struct kmem_cache *xfs_extfree_item_cache; 31 32 struct workqueue_struct *xfs_alloc_wq; 33 34 #define XFS_ABSDIFF(a,b) (((a) <= (b)) ? ((b) - (a)) : ((a) - (b))) 35 36 #define XFSA_FIXUP_BNO_OK 1 37 #define XFSA_FIXUP_CNT_OK 2 38 39 /* 40 * Size of the AGFL. For CRC-enabled filesystes we steal a couple of slots in 41 * the beginning of the block for a proper header with the location information 42 * and CRC. 43 */ 44 unsigned int 45 xfs_agfl_size( 46 struct xfs_mount *mp) 47 { 48 unsigned int size = mp->m_sb.sb_sectsize; 49 50 if (xfs_has_crc(mp)) 51 size -= sizeof(struct xfs_agfl); 52 53 return size / sizeof(xfs_agblock_t); 54 } 55 56 unsigned int 57 xfs_refc_block( 58 struct xfs_mount *mp) 59 { 60 if (xfs_has_rmapbt(mp)) 61 return XFS_RMAP_BLOCK(mp) + 1; 62 if (xfs_has_finobt(mp)) 63 return XFS_FIBT_BLOCK(mp) + 1; 64 return XFS_IBT_BLOCK(mp) + 1; 65 } 66 67 xfs_extlen_t 68 xfs_prealloc_blocks( 69 struct xfs_mount *mp) 70 { 71 if (xfs_has_reflink(mp)) 72 return xfs_refc_block(mp) + 1; 73 if (xfs_has_rmapbt(mp)) 74 return XFS_RMAP_BLOCK(mp) + 1; 75 if (xfs_has_finobt(mp)) 76 return XFS_FIBT_BLOCK(mp) + 1; 77 return XFS_IBT_BLOCK(mp) + 1; 78 } 79 80 /* 81 * The number of blocks per AG that we withhold from xfs_mod_fdblocks to 82 * guarantee that we can refill the AGFL prior to allocating space in a nearly 83 * full AG. Although the space described by the free space btrees, the 84 * blocks used by the freesp btrees themselves, and the blocks owned by the 85 * AGFL are counted in the ondisk fdblocks, it's a mistake to let the ondisk 86 * free space in the AG drop so low that the free space btrees cannot refill an 87 * empty AGFL up to the minimum level. Rather than grind through empty AGs 88 * until the fs goes down, we subtract this many AG blocks from the incore 89 * fdblocks to ensure user allocation does not overcommit the space the 90 * filesystem needs for the AGFLs. The rmap btree uses a per-AG reservation to 91 * withhold space from xfs_mod_fdblocks, so we do not account for that here. 92 */ 93 #define XFS_ALLOCBT_AGFL_RESERVE 4 94 95 /* 96 * Twice fixup for the same ag may happen within exact one tp, and the consume 97 * of agfl after first fixup may trigger second fixup's failure, then xfs will 98 * shutdown. To avoid that, we reserve blocks which can satisfy the second 99 * fixup. 100 */ 101 xfs_extlen_t 102 xfs_ag_fixup_aside( 103 struct xfs_mount *mp) 104 { 105 xfs_extlen_t ret; 106 107 ret = 2 * mp->m_alloc_maxlevels; 108 if (xfs_has_rmapbt(mp)) 109 ret += mp->m_rmap_maxlevels; 110 111 return ret; 112 } 113

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