add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/xfs/xfs_rtalloc.c
..
..
@@ -11,20 +11,14 @@
11
11
 #include "xfs_trans_resv.h"
12
12
 #include "xfs_bit.h"
13
13
 #include "xfs_mount.h"
14
-#include "xfs_defer.h"
15
14
 #include "xfs_inode.h"
16
15
 #include "xfs_bmap.h"
17
-#include "xfs_bmap_util.h"
18
16
 #include "xfs_bmap_btree.h"
19
-#include "xfs_alloc.h"
20
-#include "xfs_error.h"
21
17
 #include "xfs_trans.h"
22
18
 #include "xfs_trans_space.h"
23
-#include "xfs_trace.h"
24
-#include "xfs_buf.h"
25
19
 #include "xfs_icache.h"
26
20
 #include "xfs_rtalloc.h"
27
-
21
+#include "xfs_sb.h"
28
22
 
29
23
 /*
30
24
  * Read and return the summary information for a given extent size,
..
..
@@ -64,8 +58,12 @@
64
58
 	int		log;		/* loop counter, log2 of ext. size */
65
59
 	xfs_suminfo_t	sum;		/* summary data */
66
60
 
61
+	/* There are no extents at levels < m_rsum_cache[bbno]. */
62
+	if (mp->m_rsum_cache && low < mp->m_rsum_cache[bbno])
63
+		low = mp->m_rsum_cache[bbno];
64
+
67
65
 	/*
68
-	 * Loop over logs of extent sizes.  Order is irrelevant.
66
+	 * Loop over logs of extent sizes.
69
67
 	 */
70
68
 	for (log = low; log <= high; log++) {
71
69
 		/*
..
..
@@ -80,13 +78,17 @@
80
78
 		 */
81
79
 		if (sum) {
82
80
 			*stat = 1;
83
-			return 0;
81
+			goto out;
84
82
 		}
85
83
 	}
86
84
 	/*
87
85
 	 * Found nothing, return failure.
88
86
 	 */
89
87
 	*stat = 0;
88
+out:
89
+	/* There were no extents at levels < log. */
90
+	if (mp->m_rsum_cache && log > mp->m_rsum_cache[bbno])
91
+		mp->m_rsum_cache[bbno] = log;
90
92
 	return 0;
91
93
 }
92
94
 
..
..
@@ -776,7 +778,13 @@
776
778
 	struct xfs_bmbt_irec	map;		/* block map output */
777
779
 	int			nmap;		/* number of block maps */
778
780
 	int			resblks;	/* space reservation */
781
+	enum xfs_blft		buf_type;
779
782
 	struct xfs_trans	*tp;
783
+
784
+	if (ip == mp->m_rsumip)
785
+		buf_type = XFS_BLFT_RTSUMMARY_BUF;
786
+	else
787
+		buf_type = XFS_BLFT_RTBITMAP_BUF;
780
788
 
781
789
 	/*
782
790
 	 * Allocate space to the file, as necessary.
..
..
@@ -801,8 +809,7 @@
801
809
 		 */
802
810
 		nmap = 1;
803
811
 		error = xfs_bmapi_write(tp, ip, oblocks, nblocks - oblocks,
804
-					XFS_BMAPI_METADATA, resblks, &map,
805
-					&nmap);
812
+					XFS_BMAPI_METADATA, 0, &map, &nmap);
806
813
 		if (!error && nmap < 1)
807
814
 			error = -ENOSPC;
808
815
 		if (error)
..
..
@@ -836,12 +843,13 @@
836
843
 			 * Get a buffer for the block.
837
844
 			 */
838
845
 			d = XFS_FSB_TO_DADDR(mp, fsbno);
839
-			bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d,
840
-				mp->m_bsize, 0);
841
-			if (bp == NULL) {
842
-				error = -EIO;
846
+			error = xfs_trans_get_buf(tp, mp->m_ddev_targp, d,
847
+					mp->m_bsize, 0, &bp);
848
+			if (error)
843
849
 				goto out_trans_cancel;
844
-			}
850
+
851
+			xfs_trans_buf_set_type(tp, bp, buf_type);
852
+			bp->b_ops = &xfs_rtbuf_ops;
845
853
 			memset(bp->b_addr, 0, mp->m_sb.sb_blocksize);
846
854
 			xfs_trans_log_buf(tp, bp, 0, mp->m_sb.sb_blocksize - 1);
847
855
 			/*
..
..
@@ -862,6 +870,21 @@
862
870
 out_trans_cancel:
863
871
 	xfs_trans_cancel(tp);
864
872
 	return error;
873
+}
874
+
875
+static void
876
+xfs_alloc_rsum_cache(
877
+	xfs_mount_t	*mp,		/* file system mount structure */
878
+	xfs_extlen_t	rbmblocks)	/* number of rt bitmap blocks */
879
+{
880
+	/*
881
+	 * The rsum cache is initialized to all zeroes, which is trivially a
882
+	 * lower bound on the minimum level with any free extents. We can
883
+	 * continue without the cache if it couldn't be allocated.
884
+	 */
885
+	mp->m_rsum_cache = kvzalloc(rbmblocks, GFP_KERNEL);
886
+	if (!mp->m_rsum_cache)
887
+		xfs_warn(mp, "could not allocate realtime summary cache");
865
888
 }
866
889
 
867
890
 /*
..
..
@@ -892,6 +915,7 @@
892
915
 	xfs_extlen_t	rsumblocks;	/* current number of rt summary blks */
893
916
 	xfs_sb_t	*sbp;		/* old superblock */
894
917
 	xfs_fsblock_t	sumbno;		/* summary block number */
918
+	uint8_t		*rsum_cache;	/* old summary cache */
895
919
 
896
920
 	sbp = &mp->m_sb;
897
921
 	/*
..
..
@@ -948,10 +972,15 @@
948
972
 	error = xfs_growfs_rt_alloc(mp, rsumblocks, nrsumblocks, mp->m_rsumip);
949
973
 	if (error)
950
974
 		return error;
975
+
976
+	rsum_cache = mp->m_rsum_cache;
977
+	if (nrbmblocks != sbp->sb_rbmblocks)
978
+		xfs_alloc_rsum_cache(mp, nrbmblocks);
979
+
951
980
 	/*
952
981
 	 * Allocate a new (fake) mount/sb.
953
982
 	 */
954
-	nmp = kmem_alloc(sizeof(*nmp), KM_SLEEP);
983
+	nmp = kmem_alloc(sizeof(*nmp), 0);
955
984
 	/*
956
985
 	 * Loop over the bitmap blocks.
957
986
 	 * We will do everything one bitmap block at a time.
..
..
@@ -995,7 +1024,7 @@
995
1024
 		/*
996
1025
 		 * Lock out other callers by grabbing the bitmap inode lock.
997
1026
 		 */
998
-		xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL);
1027
+		xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL | XFS_ILOCK_RTBITMAP);
999
1028
 		xfs_trans_ijoin(tp, mp->m_rbmip, XFS_ILOCK_EXCL);
1000
1029
 		/*
1001
1030
 		 * Update the bitmap inode's size ondisk and incore.  We need
..
..
@@ -1009,7 +1038,7 @@
1009
1038
 		/*
1010
1039
 		 * Get the summary inode into the transaction.
1011
1040
 		 */
1012
-		xfs_ilock(mp->m_rsumip, XFS_ILOCK_EXCL);
1041
+		xfs_ilock(mp->m_rsumip, XFS_ILOCK_EXCL | XFS_ILOCK_RTSUM);
1013
1042
 		xfs_trans_ijoin(tp, mp->m_rsumip, XFS_ILOCK_EXCL);
1014
1043
 		/*
1015
1044
 		 * Update the summary inode's size.  We need to update the
..
..
@@ -1073,11 +1102,31 @@
1073
1102
 		if (error)
1074
1103
 			break;
1075
1104
 	}
1105
+	if (error)
1106
+		goto out_free;
1076
1107
 
1108
+	/* Update secondary superblocks now the physical grow has completed */
1109
+	error = xfs_update_secondary_sbs(mp);
1110
+
1111
+out_free:
1077
1112
 	/*
1078
1113
 	 * Free the fake mp structure.
1079
1114
 	 */
1080
1115
 	kmem_free(nmp);
1116
+
1117
+	/*
1118
+	 * If we had to allocate a new rsum_cache, we either need to free the
1119
+	 * old one (if we succeeded) or free the new one and restore the old one
1120
+	 * (if there was an error).
1121
+	 */
1122
+	if (rsum_cache != mp->m_rsum_cache) {
1123
+		if (error) {
1124
+			kmem_free(mp->m_rsum_cache);
1125
+			mp->m_rsum_cache = rsum_cache;
1126
+		} else {
1127
+			kmem_free(rsum_cache);
1128
+		}
1129
+	}
1081
1130
 
1082
1131
 	return error;
1083
1132
 }
..
..
@@ -1204,8 +1253,8 @@
1204
1253
 }
1205
1254
 
1206
1255
 /*
1207
- * Get the bitmap and summary inodes into the mount structure
1208
- * at mount time.
1256
+ * Get the bitmap and summary inodes and the summary cache into the mount
1257
+ * structure at mount time.
1209
1258
  */
1210
1259
 int					/* error */
1211
1260
 xfs_rtmount_inodes(
..
..
@@ -1226,6 +1275,7 @@
1226
1275
 		return error;
1227
1276
 	}
1228
1277
 	ASSERT(mp->m_rsumip != NULL);
1278
+	xfs_alloc_rsum_cache(mp, sbp->sb_rbmblocks);
1229
1279
 	return 0;
1230
1280
 }
1231
1281
 
..
..
@@ -1233,6 +1283,7 @@
1233
1283
 xfs_rtunmount_inodes(
1234
1284
 	struct xfs_mount	*mp)
1235
1285
 {
1286
+	kmem_free(mp->m_rsum_cache);
1236
1287
 	if (mp->m_rbmip)
1237
1288
 		xfs_irele(mp->m_rbmip);
1238
1289
 	if (mp->m_rsumip)