David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
Bob Peterson | fe6c991 | 2008-01-28 11:13:02 -0600 | [diff] [blame] | 3 | * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 4 | * |
| 5 | * This copyrighted material is made available to anyone wishing to use, |
| 6 | * modify, copy, or redistribute it subject to the terms and conditions |
Steven Whitehouse | e9fc2aa | 2006-09-01 11:05:15 -0400 | [diff] [blame] | 7 | * of the GNU General Public License version 2. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 8 | */ |
| 9 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 10 | #include <linux/slab.h> |
| 11 | #include <linux/spinlock.h> |
| 12 | #include <linux/completion.h> |
| 13 | #include <linux/buffer_head.h> |
Steven Whitehouse | f42faf4 | 2006-01-30 18:34:10 +0000 | [diff] [blame] | 14 | #include <linux/fs.h> |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 15 | #include <linux/gfs2_ondisk.h> |
Bob Peterson | 1f466a4 | 2008-03-10 18:17:47 -0500 | [diff] [blame] | 16 | #include <linux/prefetch.h> |
Steven Whitehouse | f15ab56 | 2009-02-09 09:25:01 +0000 | [diff] [blame] | 17 | #include <linux/blkdev.h> |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 18 | #include <linux/rbtree.h> |
Steven Whitehouse | 9dbe961 | 2012-10-31 10:37:10 +0000 | [diff] [blame] | 19 | #include <linux/random.h> |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 20 | |
| 21 | #include "gfs2.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 22 | #include "incore.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 23 | #include "glock.h" |
| 24 | #include "glops.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 25 | #include "lops.h" |
| 26 | #include "meta_io.h" |
| 27 | #include "quota.h" |
| 28 | #include "rgrp.h" |
| 29 | #include "super.h" |
| 30 | #include "trans.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 31 | #include "util.h" |
Benjamin Marzinski | 172e045 | 2007-03-23 14:51:56 -0600 | [diff] [blame] | 32 | #include "log.h" |
Steven Whitehouse | c8cdf47 | 2007-06-08 10:05:33 +0100 | [diff] [blame] | 33 | #include "inode.h" |
Steven Whitehouse | 6399777 | 2009-06-12 08:49:20 +0100 | [diff] [blame] | 34 | #include "trace_gfs2.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 35 | |
Steven Whitehouse | 2c1e52a | 2006-09-05 15:41:57 -0400 | [diff] [blame] | 36 | #define BFITNOENT ((u32)~0) |
Bob Peterson | 6760bdc | 2007-07-24 14:09:32 -0500 | [diff] [blame] | 37 | #define NO_BLOCK ((u64)~0) |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 38 | |
Bob Peterson | 1f466a4 | 2008-03-10 18:17:47 -0500 | [diff] [blame] | 39 | #if BITS_PER_LONG == 32 |
| 40 | #define LBITMASK (0x55555555UL) |
| 41 | #define LBITSKIP55 (0x55555555UL) |
| 42 | #define LBITSKIP00 (0x00000000UL) |
| 43 | #else |
| 44 | #define LBITMASK (0x5555555555555555UL) |
| 45 | #define LBITSKIP55 (0x5555555555555555UL) |
| 46 | #define LBITSKIP00 (0x0000000000000000UL) |
| 47 | #endif |
| 48 | |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 49 | /* |
| 50 | * These routines are used by the resource group routines (rgrp.c) |
| 51 | * to keep track of block allocation. Each block is represented by two |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 52 | * bits. So, each byte represents GFS2_NBBY (i.e. 4) blocks. |
| 53 | * |
| 54 | * 0 = Free |
| 55 | * 1 = Used (not metadata) |
| 56 | * 2 = Unlinked (still in use) inode |
| 57 | * 3 = Used (metadata) |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 58 | */ |
| 59 | |
| 60 | static const char valid_change[16] = { |
| 61 | /* current */ |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 62 | /* n */ 0, 1, 1, 1, |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 63 | /* e */ 1, 0, 0, 0, |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 64 | /* w */ 0, 0, 0, 1, |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 65 | 1, 0, 0, 0 |
| 66 | }; |
| 67 | |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 68 | static int gfs2_rbm_find(struct gfs2_rbm *rbm, u8 state, u32 minext, |
| 69 | const struct gfs2_inode *ip, bool nowrap); |
| 70 | |
| 71 | |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 72 | /** |
| 73 | * gfs2_setbit - Set a bit in the bitmaps |
Steven Whitehouse | 3e6339d | 2012-08-13 11:37:51 +0100 | [diff] [blame] | 74 | * @rbm: The position of the bit to set |
| 75 | * @do_clone: Also set the clone bitmap, if it exists |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 76 | * @new_state: the new state of the block |
| 77 | * |
| 78 | */ |
| 79 | |
Steven Whitehouse | 3e6339d | 2012-08-13 11:37:51 +0100 | [diff] [blame] | 80 | static inline void gfs2_setbit(const struct gfs2_rbm *rbm, bool do_clone, |
Bob Peterson | 06344b9 | 2012-04-26 12:44:35 -0400 | [diff] [blame] | 81 | unsigned char new_state) |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 82 | { |
Steven Whitehouse | b45e41d | 2008-02-06 10:11:15 +0000 | [diff] [blame] | 83 | unsigned char *byte1, *byte2, *end, cur_state; |
Steven Whitehouse | 3e6339d | 2012-08-13 11:37:51 +0100 | [diff] [blame] | 84 | unsigned int buflen = rbm->bi->bi_len; |
| 85 | const unsigned int bit = (rbm->offset % GFS2_NBBY) * GFS2_BIT_SIZE; |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 86 | |
Steven Whitehouse | 3e6339d | 2012-08-13 11:37:51 +0100 | [diff] [blame] | 87 | byte1 = rbm->bi->bi_bh->b_data + rbm->bi->bi_offset + (rbm->offset / GFS2_NBBY); |
| 88 | end = rbm->bi->bi_bh->b_data + rbm->bi->bi_offset + buflen; |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 89 | |
Steven Whitehouse | b45e41d | 2008-02-06 10:11:15 +0000 | [diff] [blame] | 90 | BUG_ON(byte1 >= end); |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 91 | |
Steven Whitehouse | b45e41d | 2008-02-06 10:11:15 +0000 | [diff] [blame] | 92 | cur_state = (*byte1 >> bit) & GFS2_BIT_MASK; |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 93 | |
Steven Whitehouse | b45e41d | 2008-02-06 10:11:15 +0000 | [diff] [blame] | 94 | if (unlikely(!valid_change[new_state * 4 + cur_state])) { |
Steven Whitehouse | 3e6339d | 2012-08-13 11:37:51 +0100 | [diff] [blame] | 95 | printk(KERN_WARNING "GFS2: buf_blk = 0x%x old_state=%d, " |
| 96 | "new_state=%d\n", rbm->offset, cur_state, new_state); |
| 97 | printk(KERN_WARNING "GFS2: rgrp=0x%llx bi_start=0x%x\n", |
| 98 | (unsigned long long)rbm->rgd->rd_addr, |
| 99 | rbm->bi->bi_start); |
| 100 | printk(KERN_WARNING "GFS2: bi_offset=0x%x bi_len=0x%x\n", |
| 101 | rbm->bi->bi_offset, rbm->bi->bi_len); |
Bob Peterson | 95c8e17 | 2011-03-22 10:49:12 -0400 | [diff] [blame] | 102 | dump_stack(); |
Steven Whitehouse | 3e6339d | 2012-08-13 11:37:51 +0100 | [diff] [blame] | 103 | gfs2_consist_rgrpd(rbm->rgd); |
Steven Whitehouse | b45e41d | 2008-02-06 10:11:15 +0000 | [diff] [blame] | 104 | return; |
| 105 | } |
| 106 | *byte1 ^= (cur_state ^ new_state) << bit; |
| 107 | |
Steven Whitehouse | 3e6339d | 2012-08-13 11:37:51 +0100 | [diff] [blame] | 108 | if (do_clone && rbm->bi->bi_clone) { |
| 109 | byte2 = rbm->bi->bi_clone + rbm->bi->bi_offset + (rbm->offset / GFS2_NBBY); |
Steven Whitehouse | b45e41d | 2008-02-06 10:11:15 +0000 | [diff] [blame] | 110 | cur_state = (*byte2 >> bit) & GFS2_BIT_MASK; |
| 111 | *byte2 ^= (cur_state ^ new_state) << bit; |
| 112 | } |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 113 | } |
| 114 | |
| 115 | /** |
| 116 | * gfs2_testbit - test a bit in the bitmaps |
Steven Whitehouse | c04a2ef | 2012-08-13 11:14:57 +0100 | [diff] [blame] | 117 | * @rbm: The bit to test |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 118 | * |
Steven Whitehouse | c04a2ef | 2012-08-13 11:14:57 +0100 | [diff] [blame] | 119 | * Returns: The two bit block state of the requested bit |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 120 | */ |
| 121 | |
Steven Whitehouse | c04a2ef | 2012-08-13 11:14:57 +0100 | [diff] [blame] | 122 | static inline u8 gfs2_testbit(const struct gfs2_rbm *rbm) |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 123 | { |
Steven Whitehouse | c04a2ef | 2012-08-13 11:14:57 +0100 | [diff] [blame] | 124 | const u8 *buffer = rbm->bi->bi_bh->b_data + rbm->bi->bi_offset; |
| 125 | const u8 *byte; |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 126 | unsigned int bit; |
| 127 | |
Steven Whitehouse | c04a2ef | 2012-08-13 11:14:57 +0100 | [diff] [blame] | 128 | byte = buffer + (rbm->offset / GFS2_NBBY); |
| 129 | bit = (rbm->offset % GFS2_NBBY) * GFS2_BIT_SIZE; |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 130 | |
Steven Whitehouse | c04a2ef | 2012-08-13 11:14:57 +0100 | [diff] [blame] | 131 | return (*byte >> bit) & GFS2_BIT_MASK; |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 132 | } |
| 133 | |
| 134 | /** |
Steven Whitehouse | 223b2b8 | 2009-02-17 14:13:35 +0000 | [diff] [blame] | 135 | * gfs2_bit_search |
| 136 | * @ptr: Pointer to bitmap data |
| 137 | * @mask: Mask to use (normally 0x55555.... but adjusted for search start) |
| 138 | * @state: The state we are searching for |
| 139 | * |
| 140 | * We xor the bitmap data with a patter which is the bitwise opposite |
| 141 | * of what we are looking for, this gives rise to a pattern of ones |
| 142 | * wherever there is a match. Since we have two bits per entry, we |
| 143 | * take this pattern, shift it down by one place and then and it with |
| 144 | * the original. All the even bit positions (0,2,4, etc) then represent |
| 145 | * successful matches, so we mask with 0x55555..... to remove the unwanted |
| 146 | * odd bit positions. |
| 147 | * |
| 148 | * This allows searching of a whole u64 at once (32 blocks) with a |
| 149 | * single test (on 64 bit arches). |
| 150 | */ |
| 151 | |
| 152 | static inline u64 gfs2_bit_search(const __le64 *ptr, u64 mask, u8 state) |
| 153 | { |
| 154 | u64 tmp; |
| 155 | static const u64 search[] = { |
Hannes Eder | 075ac44 | 2009-02-21 02:11:42 +0100 | [diff] [blame] | 156 | [0] = 0xffffffffffffffffULL, |
| 157 | [1] = 0xaaaaaaaaaaaaaaaaULL, |
| 158 | [2] = 0x5555555555555555ULL, |
| 159 | [3] = 0x0000000000000000ULL, |
Steven Whitehouse | 223b2b8 | 2009-02-17 14:13:35 +0000 | [diff] [blame] | 160 | }; |
| 161 | tmp = le64_to_cpu(*ptr) ^ search[state]; |
| 162 | tmp &= (tmp >> 1); |
| 163 | tmp &= mask; |
| 164 | return tmp; |
| 165 | } |
| 166 | |
| 167 | /** |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 168 | * rs_cmp - multi-block reservation range compare |
| 169 | * @blk: absolute file system block number of the new reservation |
| 170 | * @len: number of blocks in the new reservation |
| 171 | * @rs: existing reservation to compare against |
| 172 | * |
| 173 | * returns: 1 if the block range is beyond the reach of the reservation |
| 174 | * -1 if the block range is before the start of the reservation |
| 175 | * 0 if the block range overlaps with the reservation |
| 176 | */ |
| 177 | static inline int rs_cmp(u64 blk, u32 len, struct gfs2_blkreserv *rs) |
| 178 | { |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 179 | u64 startblk = gfs2_rbm_to_block(&rs->rs_rbm); |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 180 | |
| 181 | if (blk >= startblk + rs->rs_free) |
| 182 | return 1; |
| 183 | if (blk + len - 1 < startblk) |
| 184 | return -1; |
| 185 | return 0; |
| 186 | } |
| 187 | |
| 188 | /** |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 189 | * gfs2_bitfit - Search an rgrp's bitmap buffer to find a bit-pair representing |
| 190 | * a block in a given allocation state. |
Bob Peterson | 886b141 | 2012-04-11 13:03:52 -0400 | [diff] [blame] | 191 | * @buf: the buffer that holds the bitmaps |
Steven Whitehouse | 223b2b8 | 2009-02-17 14:13:35 +0000 | [diff] [blame] | 192 | * @len: the length (in bytes) of the buffer |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 193 | * @goal: start search at this block's bit-pair (within @buffer) |
Steven Whitehouse | 223b2b8 | 2009-02-17 14:13:35 +0000 | [diff] [blame] | 194 | * @state: GFS2_BLKST_XXX the state of the block we're looking for. |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 195 | * |
| 196 | * Scope of @goal and returned block number is only within this bitmap buffer, |
| 197 | * not entire rgrp or filesystem. @buffer will be offset from the actual |
Steven Whitehouse | 223b2b8 | 2009-02-17 14:13:35 +0000 | [diff] [blame] | 198 | * beginning of a bitmap block buffer, skipping any header structures, but |
| 199 | * headers are always a multiple of 64 bits long so that the buffer is |
| 200 | * always aligned to a 64 bit boundary. |
| 201 | * |
| 202 | * The size of the buffer is in bytes, but is it assumed that it is |
Anand Gadiyar | fd589a8 | 2009-07-16 17:13:03 +0200 | [diff] [blame] | 203 | * always ok to read a complete multiple of 64 bits at the end |
Steven Whitehouse | 223b2b8 | 2009-02-17 14:13:35 +0000 | [diff] [blame] | 204 | * of the block in case the end is no aligned to a natural boundary. |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 205 | * |
| 206 | * Return: the block number (bitmap buffer scope) that was found |
| 207 | */ |
| 208 | |
Hannes Eder | 02ab172 | 2009-02-21 02:12:05 +0100 | [diff] [blame] | 209 | static u32 gfs2_bitfit(const u8 *buf, const unsigned int len, |
| 210 | u32 goal, u8 state) |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 211 | { |
Steven Whitehouse | 223b2b8 | 2009-02-17 14:13:35 +0000 | [diff] [blame] | 212 | u32 spoint = (goal << 1) & ((8*sizeof(u64)) - 1); |
| 213 | const __le64 *ptr = ((__le64 *)buf) + (goal >> 5); |
| 214 | const __le64 *end = (__le64 *)(buf + ALIGN(len, sizeof(u64))); |
| 215 | u64 tmp; |
Hannes Eder | 075ac44 | 2009-02-21 02:11:42 +0100 | [diff] [blame] | 216 | u64 mask = 0x5555555555555555ULL; |
Steven Whitehouse | 223b2b8 | 2009-02-17 14:13:35 +0000 | [diff] [blame] | 217 | u32 bit; |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 218 | |
Steven Whitehouse | 223b2b8 | 2009-02-17 14:13:35 +0000 | [diff] [blame] | 219 | /* Mask off bits we don't care about at the start of the search */ |
| 220 | mask <<= spoint; |
| 221 | tmp = gfs2_bit_search(ptr, mask, state); |
| 222 | ptr++; |
| 223 | while(tmp == 0 && ptr < end) { |
Hannes Eder | 075ac44 | 2009-02-21 02:11:42 +0100 | [diff] [blame] | 224 | tmp = gfs2_bit_search(ptr, 0x5555555555555555ULL, state); |
Steven Whitehouse | 223b2b8 | 2009-02-17 14:13:35 +0000 | [diff] [blame] | 225 | ptr++; |
Bob Peterson | 1f466a4 | 2008-03-10 18:17:47 -0500 | [diff] [blame] | 226 | } |
Steven Whitehouse | 223b2b8 | 2009-02-17 14:13:35 +0000 | [diff] [blame] | 227 | /* Mask off any bits which are more than len bytes from the start */ |
| 228 | if (ptr == end && (len & (sizeof(u64) - 1))) |
| 229 | tmp &= (((u64)~0) >> (64 - 8*(len & (sizeof(u64) - 1)))); |
| 230 | /* Didn't find anything, so return */ |
| 231 | if (tmp == 0) |
| 232 | return BFITNOENT; |
| 233 | ptr--; |
Steven Whitehouse | d8bd504 | 2009-04-23 08:54:02 +0100 | [diff] [blame] | 234 | bit = __ffs64(tmp); |
Steven Whitehouse | 223b2b8 | 2009-02-17 14:13:35 +0000 | [diff] [blame] | 235 | bit /= 2; /* two bits per entry in the bitmap */ |
| 236 | return (((const unsigned char *)ptr - buf) * GFS2_NBBY) + bit; |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 237 | } |
| 238 | |
| 239 | /** |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 240 | * gfs2_rbm_from_block - Set the rbm based upon rgd and block number |
| 241 | * @rbm: The rbm with rgd already set correctly |
| 242 | * @block: The block number (filesystem relative) |
| 243 | * |
| 244 | * This sets the bi and offset members of an rbm based on a |
| 245 | * resource group and a filesystem relative block number. The |
| 246 | * resource group must be set in the rbm on entry, the bi and |
| 247 | * offset members will be set by this function. |
| 248 | * |
| 249 | * Returns: 0 on success, or an error code |
| 250 | */ |
| 251 | |
| 252 | static int gfs2_rbm_from_block(struct gfs2_rbm *rbm, u64 block) |
| 253 | { |
| 254 | u64 rblock = block - rbm->rgd->rd_data0; |
Bob Peterson | a68a0a3 | 2012-10-19 08:32:51 -0400 | [diff] [blame] | 255 | u32 x; |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 256 | |
| 257 | if (WARN_ON_ONCE(rblock > UINT_MAX)) |
| 258 | return -EINVAL; |
| 259 | if (block >= rbm->rgd->rd_data0 + rbm->rgd->rd_data) |
| 260 | return -E2BIG; |
| 261 | |
Bob Peterson | a68a0a3 | 2012-10-19 08:32:51 -0400 | [diff] [blame] | 262 | rbm->bi = rbm->rgd->rd_bits; |
| 263 | rbm->offset = (u32)(rblock); |
| 264 | /* Check if the block is within the first block */ |
| 265 | if (rbm->offset < (rbm->bi->bi_start + rbm->bi->bi_len) * GFS2_NBBY) |
| 266 | return 0; |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 267 | |
Bob Peterson | a68a0a3 | 2012-10-19 08:32:51 -0400 | [diff] [blame] | 268 | /* Adjust for the size diff between gfs2_meta_header and gfs2_rgrp */ |
| 269 | rbm->offset += (sizeof(struct gfs2_rgrp) - |
| 270 | sizeof(struct gfs2_meta_header)) * GFS2_NBBY; |
| 271 | x = rbm->offset / rbm->rgd->rd_sbd->sd_blocks_per_bitmap; |
| 272 | rbm->offset -= x * rbm->rgd->rd_sbd->sd_blocks_per_bitmap; |
| 273 | rbm->bi += x; |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 274 | return 0; |
| 275 | } |
| 276 | |
| 277 | /** |
| 278 | * gfs2_unaligned_extlen - Look for free blocks which are not byte aligned |
| 279 | * @rbm: Position to search (value/result) |
| 280 | * @n_unaligned: Number of unaligned blocks to check |
| 281 | * @len: Decremented for each block found (terminate on zero) |
| 282 | * |
| 283 | * Returns: true if a non-free block is encountered |
| 284 | */ |
| 285 | |
| 286 | static bool gfs2_unaligned_extlen(struct gfs2_rbm *rbm, u32 n_unaligned, u32 *len) |
| 287 | { |
| 288 | u64 block; |
| 289 | u32 n; |
| 290 | u8 res; |
| 291 | |
| 292 | for (n = 0; n < n_unaligned; n++) { |
| 293 | res = gfs2_testbit(rbm); |
| 294 | if (res != GFS2_BLKST_FREE) |
| 295 | return true; |
| 296 | (*len)--; |
| 297 | if (*len == 0) |
| 298 | return true; |
| 299 | block = gfs2_rbm_to_block(rbm); |
| 300 | if (gfs2_rbm_from_block(rbm, block + 1)) |
| 301 | return true; |
| 302 | } |
| 303 | |
| 304 | return false; |
| 305 | } |
| 306 | |
| 307 | /** |
| 308 | * gfs2_free_extlen - Return extent length of free blocks |
| 309 | * @rbm: Starting position |
| 310 | * @len: Max length to check |
| 311 | * |
| 312 | * Starting at the block specified by the rbm, see how many free blocks |
| 313 | * there are, not reading more than len blocks ahead. This can be done |
| 314 | * using memchr_inv when the blocks are byte aligned, but has to be done |
| 315 | * on a block by block basis in case of unaligned blocks. Also this |
| 316 | * function can cope with bitmap boundaries (although it must stop on |
| 317 | * a resource group boundary) |
| 318 | * |
| 319 | * Returns: Number of free blocks in the extent |
| 320 | */ |
| 321 | |
| 322 | static u32 gfs2_free_extlen(const struct gfs2_rbm *rrbm, u32 len) |
| 323 | { |
| 324 | struct gfs2_rbm rbm = *rrbm; |
| 325 | u32 n_unaligned = rbm.offset & 3; |
| 326 | u32 size = len; |
| 327 | u32 bytes; |
| 328 | u32 chunk_size; |
| 329 | u8 *ptr, *start, *end; |
| 330 | u64 block; |
| 331 | |
| 332 | if (n_unaligned && |
| 333 | gfs2_unaligned_extlen(&rbm, 4 - n_unaligned, &len)) |
| 334 | goto out; |
| 335 | |
Bob Peterson | 3701530 | 2012-09-12 09:40:31 -0400 | [diff] [blame] | 336 | n_unaligned = len & 3; |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 337 | /* Start is now byte aligned */ |
| 338 | while (len > 3) { |
| 339 | start = rbm.bi->bi_bh->b_data; |
| 340 | if (rbm.bi->bi_clone) |
| 341 | start = rbm.bi->bi_clone; |
| 342 | end = start + rbm.bi->bi_bh->b_size; |
| 343 | start += rbm.bi->bi_offset; |
| 344 | BUG_ON(rbm.offset & 3); |
| 345 | start += (rbm.offset / GFS2_NBBY); |
| 346 | bytes = min_t(u32, len / GFS2_NBBY, (end - start)); |
| 347 | ptr = memchr_inv(start, 0, bytes); |
| 348 | chunk_size = ((ptr == NULL) ? bytes : (ptr - start)); |
| 349 | chunk_size *= GFS2_NBBY; |
| 350 | BUG_ON(len < chunk_size); |
| 351 | len -= chunk_size; |
| 352 | block = gfs2_rbm_to_block(&rbm); |
Bob Peterson | 15bd50a | 2012-12-20 13:21:07 -0500 | [diff] [blame] | 353 | if (gfs2_rbm_from_block(&rbm, block + chunk_size)) { |
| 354 | n_unaligned = 0; |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 355 | break; |
Bob Peterson | 15bd50a | 2012-12-20 13:21:07 -0500 | [diff] [blame] | 356 | } |
| 357 | if (ptr) { |
| 358 | n_unaligned = 3; |
| 359 | break; |
| 360 | } |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 361 | n_unaligned = len & 3; |
| 362 | } |
| 363 | |
| 364 | /* Deal with any bits left over at the end */ |
| 365 | if (n_unaligned) |
| 366 | gfs2_unaligned_extlen(&rbm, n_unaligned, &len); |
| 367 | out: |
| 368 | return size - len; |
| 369 | } |
| 370 | |
| 371 | /** |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 372 | * gfs2_bitcount - count the number of bits in a certain state |
Bob Peterson | 886b141 | 2012-04-11 13:03:52 -0400 | [diff] [blame] | 373 | * @rgd: the resource group descriptor |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 374 | * @buffer: the buffer that holds the bitmaps |
| 375 | * @buflen: the length (in bytes) of the buffer |
| 376 | * @state: the state of the block we're looking for |
| 377 | * |
| 378 | * Returns: The number of bits |
| 379 | */ |
| 380 | |
Steven Whitehouse | 110acf3 | 2008-01-29 13:30:20 +0000 | [diff] [blame] | 381 | static u32 gfs2_bitcount(struct gfs2_rgrpd *rgd, const u8 *buffer, |
| 382 | unsigned int buflen, u8 state) |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 383 | { |
Steven Whitehouse | 110acf3 | 2008-01-29 13:30:20 +0000 | [diff] [blame] | 384 | const u8 *byte = buffer; |
| 385 | const u8 *end = buffer + buflen; |
| 386 | const u8 state1 = state << 2; |
| 387 | const u8 state2 = state << 4; |
| 388 | const u8 state3 = state << 6; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 389 | u32 count = 0; |
Steven Whitehouse | 88c8ab1f | 2006-05-18 13:52:39 -0400 | [diff] [blame] | 390 | |
| 391 | for (; byte < end; byte++) { |
| 392 | if (((*byte) & 0x03) == state) |
| 393 | count++; |
| 394 | if (((*byte) & 0x0C) == state1) |
| 395 | count++; |
| 396 | if (((*byte) & 0x30) == state2) |
| 397 | count++; |
| 398 | if (((*byte) & 0xC0) == state3) |
| 399 | count++; |
| 400 | } |
| 401 | |
| 402 | return count; |
| 403 | } |
| 404 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 405 | /** |
| 406 | * gfs2_rgrp_verify - Verify that a resource group is consistent |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 407 | * @rgd: the rgrp |
| 408 | * |
| 409 | */ |
| 410 | |
| 411 | void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd) |
| 412 | { |
| 413 | struct gfs2_sbd *sdp = rgd->rd_sbd; |
| 414 | struct gfs2_bitmap *bi = NULL; |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 415 | u32 length = rgd->rd_length; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 416 | u32 count[4], tmp; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 417 | int buf, x; |
| 418 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 419 | memset(count, 0, 4 * sizeof(u32)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 420 | |
| 421 | /* Count # blocks in each of 4 possible allocation states */ |
| 422 | for (buf = 0; buf < length; buf++) { |
| 423 | bi = rgd->rd_bits + buf; |
| 424 | for (x = 0; x < 4; x++) |
| 425 | count[x] += gfs2_bitcount(rgd, |
| 426 | bi->bi_bh->b_data + |
| 427 | bi->bi_offset, |
| 428 | bi->bi_len, x); |
| 429 | } |
| 430 | |
Steven Whitehouse | cfc8b54 | 2008-11-04 10:25:13 +0000 | [diff] [blame] | 431 | if (count[0] != rgd->rd_free) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 432 | if (gfs2_consist_rgrpd(rgd)) |
| 433 | fs_err(sdp, "free data mismatch: %u != %u\n", |
Steven Whitehouse | cfc8b54 | 2008-11-04 10:25:13 +0000 | [diff] [blame] | 434 | count[0], rgd->rd_free); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 435 | return; |
| 436 | } |
| 437 | |
Steven Whitehouse | 73f7494 | 2008-11-04 10:32:57 +0000 | [diff] [blame] | 438 | tmp = rgd->rd_data - rgd->rd_free - rgd->rd_dinodes; |
Benjamin Marzinski | 6b94617 | 2009-07-10 18:13:26 -0500 | [diff] [blame] | 439 | if (count[1] != tmp) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 440 | if (gfs2_consist_rgrpd(rgd)) |
| 441 | fs_err(sdp, "used data mismatch: %u != %u\n", |
| 442 | count[1], tmp); |
| 443 | return; |
| 444 | } |
| 445 | |
Benjamin Marzinski | 6b94617 | 2009-07-10 18:13:26 -0500 | [diff] [blame] | 446 | if (count[2] + count[3] != rgd->rd_dinodes) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 447 | if (gfs2_consist_rgrpd(rgd)) |
| 448 | fs_err(sdp, "used metadata mismatch: %u != %u\n", |
Benjamin Marzinski | 6b94617 | 2009-07-10 18:13:26 -0500 | [diff] [blame] | 449 | count[2] + count[3], rgd->rd_dinodes); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 450 | return; |
| 451 | } |
| 452 | } |
| 453 | |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 454 | static inline int rgrp_contains_block(struct gfs2_rgrpd *rgd, u64 block) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 455 | { |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 456 | u64 first = rgd->rd_data0; |
| 457 | u64 last = first + rgd->rd_data; |
Steven Whitehouse | 1691042 | 2006-09-05 11:15:45 -0400 | [diff] [blame] | 458 | return first <= block && block < last; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 459 | } |
| 460 | |
| 461 | /** |
| 462 | * gfs2_blk2rgrpd - Find resource group for a given data/meta block number |
| 463 | * @sdp: The GFS2 superblock |
Bob Peterson | 886b141 | 2012-04-11 13:03:52 -0400 | [diff] [blame] | 464 | * @blk: The data block number |
| 465 | * @exact: True if this needs to be an exact match |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 466 | * |
| 467 | * Returns: The resource group, or NULL if not found |
| 468 | */ |
| 469 | |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 470 | struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk, bool exact) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 471 | { |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 472 | struct rb_node *n, *next; |
Steven Whitehouse | f75bbfb | 2011-09-08 10:21:13 +0100 | [diff] [blame] | 473 | struct gfs2_rgrpd *cur; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 474 | |
| 475 | spin_lock(&sdp->sd_rindex_spin); |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 476 | n = sdp->sd_rindex_tree.rb_node; |
| 477 | while (n) { |
| 478 | cur = rb_entry(n, struct gfs2_rgrpd, rd_node); |
| 479 | next = NULL; |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 480 | if (blk < cur->rd_addr) |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 481 | next = n->rb_left; |
Steven Whitehouse | f75bbfb | 2011-09-08 10:21:13 +0100 | [diff] [blame] | 482 | else if (blk >= cur->rd_data0 + cur->rd_data) |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 483 | next = n->rb_right; |
| 484 | if (next == NULL) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 485 | spin_unlock(&sdp->sd_rindex_spin); |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 486 | if (exact) { |
| 487 | if (blk < cur->rd_addr) |
| 488 | return NULL; |
| 489 | if (blk >= cur->rd_data0 + cur->rd_data) |
| 490 | return NULL; |
| 491 | } |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 492 | return cur; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 493 | } |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 494 | n = next; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 495 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 496 | spin_unlock(&sdp->sd_rindex_spin); |
| 497 | |
| 498 | return NULL; |
| 499 | } |
| 500 | |
| 501 | /** |
| 502 | * gfs2_rgrpd_get_first - get the first Resource Group in the filesystem |
| 503 | * @sdp: The GFS2 superblock |
| 504 | * |
| 505 | * Returns: The first rgrp in the filesystem |
| 506 | */ |
| 507 | |
| 508 | struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp) |
| 509 | { |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 510 | const struct rb_node *n; |
| 511 | struct gfs2_rgrpd *rgd; |
| 512 | |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 513 | spin_lock(&sdp->sd_rindex_spin); |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 514 | n = rb_first(&sdp->sd_rindex_tree); |
| 515 | rgd = rb_entry(n, struct gfs2_rgrpd, rd_node); |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 516 | spin_unlock(&sdp->sd_rindex_spin); |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 517 | |
| 518 | return rgd; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 519 | } |
| 520 | |
| 521 | /** |
| 522 | * gfs2_rgrpd_get_next - get the next RG |
Bob Peterson | 886b141 | 2012-04-11 13:03:52 -0400 | [diff] [blame] | 523 | * @rgd: the resource group descriptor |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 524 | * |
| 525 | * Returns: The next rgrp |
| 526 | */ |
| 527 | |
| 528 | struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd) |
| 529 | { |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 530 | struct gfs2_sbd *sdp = rgd->rd_sbd; |
| 531 | const struct rb_node *n; |
| 532 | |
| 533 | spin_lock(&sdp->sd_rindex_spin); |
| 534 | n = rb_next(&rgd->rd_node); |
| 535 | if (n == NULL) |
| 536 | n = rb_first(&sdp->sd_rindex_tree); |
| 537 | |
| 538 | if (unlikely(&rgd->rd_node == n)) { |
| 539 | spin_unlock(&sdp->sd_rindex_spin); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 540 | return NULL; |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 541 | } |
| 542 | rgd = rb_entry(n, struct gfs2_rgrpd, rd_node); |
| 543 | spin_unlock(&sdp->sd_rindex_spin); |
| 544 | return rgd; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 545 | } |
| 546 | |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 547 | void gfs2_free_clones(struct gfs2_rgrpd *rgd) |
| 548 | { |
| 549 | int x; |
| 550 | |
| 551 | for (x = 0; x < rgd->rd_length; x++) { |
| 552 | struct gfs2_bitmap *bi = rgd->rd_bits + x; |
| 553 | kfree(bi->bi_clone); |
| 554 | bi->bi_clone = NULL; |
| 555 | } |
| 556 | } |
| 557 | |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 558 | /** |
| 559 | * gfs2_rs_alloc - make sure we have a reservation assigned to the inode |
| 560 | * @ip: the inode for this reservation |
| 561 | */ |
| 562 | int gfs2_rs_alloc(struct gfs2_inode *ip) |
| 563 | { |
Abhijith Das | f1213ca | 2012-12-19 10:48:01 -0500 | [diff] [blame] | 564 | int error = 0; |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 565 | |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 566 | down_write(&ip->i_rw_mutex); |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 567 | if (ip->i_res) |
Abhijith Das | f1213ca | 2012-12-19 10:48:01 -0500 | [diff] [blame] | 568 | goto out; |
| 569 | |
| 570 | ip->i_res = kmem_cache_zalloc(gfs2_rsrv_cachep, GFP_NOFS); |
| 571 | if (!ip->i_res) { |
| 572 | error = -ENOMEM; |
| 573 | goto out; |
| 574 | } |
| 575 | |
| 576 | RB_CLEAR_NODE(&ip->i_res->rs_node); |
| 577 | out: |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 578 | up_write(&ip->i_rw_mutex); |
Andrew Price | cd0ed19 | 2012-10-12 16:45:09 +0100 | [diff] [blame] | 579 | return 0; |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 580 | } |
| 581 | |
Steven Whitehouse | 9e733d3 | 2012-08-23 15:37:59 +0100 | [diff] [blame] | 582 | static void dump_rs(struct seq_file *seq, const struct gfs2_blkreserv *rs) |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 583 | { |
Steven Whitehouse | 9e733d3 | 2012-08-23 15:37:59 +0100 | [diff] [blame] | 584 | gfs2_print_dbg(seq, " B: n:%llu s:%llu b:%u f:%u\n", |
| 585 | (unsigned long long)rs->rs_inum, |
| 586 | (unsigned long long)gfs2_rbm_to_block(&rs->rs_rbm), |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 587 | rs->rs_rbm.offset, rs->rs_free); |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 588 | } |
| 589 | |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 590 | /** |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 591 | * __rs_deltree - remove a multi-block reservation from the rgd tree |
| 592 | * @rs: The reservation to remove |
| 593 | * |
| 594 | */ |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 595 | static void __rs_deltree(struct gfs2_inode *ip, struct gfs2_blkreserv *rs) |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 596 | { |
| 597 | struct gfs2_rgrpd *rgd; |
| 598 | |
| 599 | if (!gfs2_rs_active(rs)) |
| 600 | return; |
| 601 | |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 602 | rgd = rs->rs_rbm.rgd; |
Steven Whitehouse | 9e733d3 | 2012-08-23 15:37:59 +0100 | [diff] [blame] | 603 | trace_gfs2_rs(rs, TRACE_RS_TREEDEL); |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 604 | rb_erase(&rs->rs_node, &rgd->rd_rstree); |
Michel Lespinasse | 24d634e | 2012-08-05 22:04:08 -0700 | [diff] [blame] | 605 | RB_CLEAR_NODE(&rs->rs_node); |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 606 | |
| 607 | if (rs->rs_free) { |
| 608 | /* return reserved blocks to the rgrp and the ip */ |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 609 | BUG_ON(rs->rs_rbm.rgd->rd_reserved < rs->rs_free); |
| 610 | rs->rs_rbm.rgd->rd_reserved -= rs->rs_free; |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 611 | rs->rs_free = 0; |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 612 | clear_bit(GBF_FULL, &rs->rs_rbm.bi->bi_flags); |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 613 | smp_mb__after_clear_bit(); |
| 614 | } |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 615 | } |
| 616 | |
| 617 | /** |
| 618 | * gfs2_rs_deltree - remove a multi-block reservation from the rgd tree |
| 619 | * @rs: The reservation to remove |
| 620 | * |
| 621 | */ |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 622 | void gfs2_rs_deltree(struct gfs2_inode *ip, struct gfs2_blkreserv *rs) |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 623 | { |
| 624 | struct gfs2_rgrpd *rgd; |
| 625 | |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 626 | rgd = rs->rs_rbm.rgd; |
| 627 | if (rgd) { |
| 628 | spin_lock(&rgd->rd_rsspin); |
| 629 | __rs_deltree(ip, rs); |
| 630 | spin_unlock(&rgd->rd_rsspin); |
| 631 | } |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 632 | } |
| 633 | |
| 634 | /** |
| 635 | * gfs2_rs_delete - delete a multi-block reservation |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 636 | * @ip: The inode for this reservation |
| 637 | * |
| 638 | */ |
| 639 | void gfs2_rs_delete(struct gfs2_inode *ip) |
| 640 | { |
| 641 | down_write(&ip->i_rw_mutex); |
| 642 | if (ip->i_res) { |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 643 | gfs2_rs_deltree(ip, ip->i_res); |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 644 | BUG_ON(ip->i_res->rs_free); |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 645 | kmem_cache_free(gfs2_rsrv_cachep, ip->i_res); |
| 646 | ip->i_res = NULL; |
| 647 | } |
| 648 | up_write(&ip->i_rw_mutex); |
| 649 | } |
| 650 | |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 651 | /** |
| 652 | * return_all_reservations - return all reserved blocks back to the rgrp. |
| 653 | * @rgd: the rgrp that needs its space back |
| 654 | * |
| 655 | * We previously reserved a bunch of blocks for allocation. Now we need to |
| 656 | * give them back. This leave the reservation structures in tact, but removes |
| 657 | * all of their corresponding "no-fly zones". |
| 658 | */ |
| 659 | static void return_all_reservations(struct gfs2_rgrpd *rgd) |
| 660 | { |
| 661 | struct rb_node *n; |
| 662 | struct gfs2_blkreserv *rs; |
| 663 | |
| 664 | spin_lock(&rgd->rd_rsspin); |
| 665 | while ((n = rb_first(&rgd->rd_rstree))) { |
| 666 | rs = rb_entry(n, struct gfs2_blkreserv, rs_node); |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 667 | __rs_deltree(NULL, rs); |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 668 | } |
| 669 | spin_unlock(&rgd->rd_rsspin); |
| 670 | } |
| 671 | |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 672 | void gfs2_clear_rgrpd(struct gfs2_sbd *sdp) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 673 | { |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 674 | struct rb_node *n; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 675 | struct gfs2_rgrpd *rgd; |
| 676 | struct gfs2_glock *gl; |
| 677 | |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 678 | while ((n = rb_first(&sdp->sd_rindex_tree))) { |
| 679 | rgd = rb_entry(n, struct gfs2_rgrpd, rd_node); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 680 | gl = rgd->rd_gl; |
| 681 | |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 682 | rb_erase(n, &sdp->sd_rindex_tree); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 683 | |
| 684 | if (gl) { |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 685 | spin_lock(&gl->gl_spin); |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 686 | gl->gl_object = NULL; |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 687 | spin_unlock(&gl->gl_spin); |
Steven Whitehouse | 29687a2 | 2011-03-30 16:33:25 +0100 | [diff] [blame] | 688 | gfs2_glock_add_to_lru(gl); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 689 | gfs2_glock_put(gl); |
| 690 | } |
| 691 | |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 692 | gfs2_free_clones(rgd); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 693 | kfree(rgd->rd_bits); |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 694 | return_all_reservations(rgd); |
Bob Peterson | 6bdd9be | 2008-01-28 17:20:26 -0600 | [diff] [blame] | 695 | kmem_cache_free(gfs2_rgrpd_cachep, rgd); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 696 | } |
| 697 | } |
| 698 | |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 699 | static void gfs2_rindex_print(const struct gfs2_rgrpd *rgd) |
| 700 | { |
| 701 | printk(KERN_INFO " ri_addr = %llu\n", (unsigned long long)rgd->rd_addr); |
| 702 | printk(KERN_INFO " ri_length = %u\n", rgd->rd_length); |
| 703 | printk(KERN_INFO " ri_data0 = %llu\n", (unsigned long long)rgd->rd_data0); |
| 704 | printk(KERN_INFO " ri_data = %u\n", rgd->rd_data); |
| 705 | printk(KERN_INFO " ri_bitbytes = %u\n", rgd->rd_bitbytes); |
| 706 | } |
| 707 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 708 | /** |
| 709 | * gfs2_compute_bitstructs - Compute the bitmap sizes |
| 710 | * @rgd: The resource group descriptor |
| 711 | * |
| 712 | * Calculates bitmap descriptors, one for each block that contains bitmap data |
| 713 | * |
| 714 | * Returns: errno |
| 715 | */ |
| 716 | |
| 717 | static int compute_bitstructs(struct gfs2_rgrpd *rgd) |
| 718 | { |
| 719 | struct gfs2_sbd *sdp = rgd->rd_sbd; |
| 720 | struct gfs2_bitmap *bi; |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 721 | u32 length = rgd->rd_length; /* # blocks in hdr & bitmap */ |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 722 | u32 bytes_left, bytes; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 723 | int x; |
| 724 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 725 | if (!length) |
| 726 | return -EINVAL; |
| 727 | |
Steven Whitehouse | dd894be | 2006-07-27 14:29:00 -0400 | [diff] [blame] | 728 | rgd->rd_bits = kcalloc(length, sizeof(struct gfs2_bitmap), GFP_NOFS); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 729 | if (!rgd->rd_bits) |
| 730 | return -ENOMEM; |
| 731 | |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 732 | bytes_left = rgd->rd_bitbytes; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 733 | |
| 734 | for (x = 0; x < length; x++) { |
| 735 | bi = rgd->rd_bits + x; |
| 736 | |
Steven Whitehouse | 60a0b8f | 2009-05-21 12:23:12 +0100 | [diff] [blame] | 737 | bi->bi_flags = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 738 | /* small rgrp; bitmap stored completely in header block */ |
| 739 | if (length == 1) { |
| 740 | bytes = bytes_left; |
| 741 | bi->bi_offset = sizeof(struct gfs2_rgrp); |
| 742 | bi->bi_start = 0; |
| 743 | bi->bi_len = bytes; |
| 744 | /* header block */ |
| 745 | } else if (x == 0) { |
| 746 | bytes = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_rgrp); |
| 747 | bi->bi_offset = sizeof(struct gfs2_rgrp); |
| 748 | bi->bi_start = 0; |
| 749 | bi->bi_len = bytes; |
| 750 | /* last block */ |
| 751 | } else if (x + 1 == length) { |
| 752 | bytes = bytes_left; |
| 753 | bi->bi_offset = sizeof(struct gfs2_meta_header); |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 754 | bi->bi_start = rgd->rd_bitbytes - bytes_left; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 755 | bi->bi_len = bytes; |
| 756 | /* other blocks */ |
| 757 | } else { |
Steven Whitehouse | 568f4c9 | 2006-02-27 12:00:42 -0500 | [diff] [blame] | 758 | bytes = sdp->sd_sb.sb_bsize - |
| 759 | sizeof(struct gfs2_meta_header); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 760 | bi->bi_offset = sizeof(struct gfs2_meta_header); |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 761 | bi->bi_start = rgd->rd_bitbytes - bytes_left; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 762 | bi->bi_len = bytes; |
| 763 | } |
| 764 | |
| 765 | bytes_left -= bytes; |
| 766 | } |
| 767 | |
| 768 | if (bytes_left) { |
| 769 | gfs2_consist_rgrpd(rgd); |
| 770 | return -EIO; |
| 771 | } |
| 772 | bi = rgd->rd_bits + (length - 1); |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 773 | if ((bi->bi_start + bi->bi_len) * GFS2_NBBY != rgd->rd_data) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 774 | if (gfs2_consist_rgrpd(rgd)) { |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 775 | gfs2_rindex_print(rgd); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 776 | fs_err(sdp, "start=%u len=%u offset=%u\n", |
| 777 | bi->bi_start, bi->bi_len, bi->bi_offset); |
| 778 | } |
| 779 | return -EIO; |
| 780 | } |
| 781 | |
| 782 | return 0; |
| 783 | } |
| 784 | |
| 785 | /** |
Robert Peterson | 7ae8fa8 | 2007-05-09 09:37:57 -0500 | [diff] [blame] | 786 | * gfs2_ri_total - Total up the file system space, according to the rindex. |
Bob Peterson | 886b141 | 2012-04-11 13:03:52 -0400 | [diff] [blame] | 787 | * @sdp: the filesystem |
Robert Peterson | 7ae8fa8 | 2007-05-09 09:37:57 -0500 | [diff] [blame] | 788 | * |
| 789 | */ |
| 790 | u64 gfs2_ri_total(struct gfs2_sbd *sdp) |
| 791 | { |
| 792 | u64 total_data = 0; |
| 793 | struct inode *inode = sdp->sd_rindex; |
| 794 | struct gfs2_inode *ip = GFS2_I(inode); |
Robert Peterson | 7ae8fa8 | 2007-05-09 09:37:57 -0500 | [diff] [blame] | 795 | char buf[sizeof(struct gfs2_rindex)]; |
Robert Peterson | 7ae8fa8 | 2007-05-09 09:37:57 -0500 | [diff] [blame] | 796 | int error, rgrps; |
| 797 | |
Robert Peterson | 7ae8fa8 | 2007-05-09 09:37:57 -0500 | [diff] [blame] | 798 | for (rgrps = 0;; rgrps++) { |
| 799 | loff_t pos = rgrps * sizeof(struct gfs2_rindex); |
| 800 | |
Bob Peterson | bcd7278 | 2010-12-07 13:58:56 -0500 | [diff] [blame] | 801 | if (pos + sizeof(struct gfs2_rindex) > i_size_read(inode)) |
Robert Peterson | 7ae8fa8 | 2007-05-09 09:37:57 -0500 | [diff] [blame] | 802 | break; |
Andrew Price | 4306629 | 2012-04-16 16:40:55 +0100 | [diff] [blame] | 803 | error = gfs2_internal_read(ip, buf, &pos, |
Robert Peterson | 7ae8fa8 | 2007-05-09 09:37:57 -0500 | [diff] [blame] | 804 | sizeof(struct gfs2_rindex)); |
| 805 | if (error != sizeof(struct gfs2_rindex)) |
| 806 | break; |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 807 | total_data += be32_to_cpu(((struct gfs2_rindex *)buf)->ri_data); |
Robert Peterson | 7ae8fa8 | 2007-05-09 09:37:57 -0500 | [diff] [blame] | 808 | } |
Robert Peterson | 7ae8fa8 | 2007-05-09 09:37:57 -0500 | [diff] [blame] | 809 | return total_data; |
| 810 | } |
| 811 | |
Bob Peterson | 6aad1c3 | 2012-03-05 09:20:59 -0500 | [diff] [blame] | 812 | static int rgd_insert(struct gfs2_rgrpd *rgd) |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 813 | { |
| 814 | struct gfs2_sbd *sdp = rgd->rd_sbd; |
| 815 | struct rb_node **newn = &sdp->sd_rindex_tree.rb_node, *parent = NULL; |
| 816 | |
| 817 | /* Figure out where to put new node */ |
| 818 | while (*newn) { |
| 819 | struct gfs2_rgrpd *cur = rb_entry(*newn, struct gfs2_rgrpd, |
| 820 | rd_node); |
| 821 | |
| 822 | parent = *newn; |
| 823 | if (rgd->rd_addr < cur->rd_addr) |
| 824 | newn = &((*newn)->rb_left); |
| 825 | else if (rgd->rd_addr > cur->rd_addr) |
| 826 | newn = &((*newn)->rb_right); |
| 827 | else |
Bob Peterson | 6aad1c3 | 2012-03-05 09:20:59 -0500 | [diff] [blame] | 828 | return -EEXIST; |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 829 | } |
| 830 | |
| 831 | rb_link_node(&rgd->rd_node, parent, newn); |
| 832 | rb_insert_color(&rgd->rd_node, &sdp->sd_rindex_tree); |
Bob Peterson | 6aad1c3 | 2012-03-05 09:20:59 -0500 | [diff] [blame] | 833 | sdp->sd_rgrps++; |
| 834 | return 0; |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 835 | } |
| 836 | |
Robert Peterson | 7ae8fa8 | 2007-05-09 09:37:57 -0500 | [diff] [blame] | 837 | /** |
Robert Peterson | 6c53267 | 2007-05-10 16:54:38 -0500 | [diff] [blame] | 838 | * read_rindex_entry - Pull in a new resource index entry from the disk |
Andrew Price | 4306629 | 2012-04-16 16:40:55 +0100 | [diff] [blame] | 839 | * @ip: Pointer to the rindex inode |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 840 | * |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 841 | * Returns: 0 on success, > 0 on EOF, error code otherwise |
Robert Peterson | 6c53267 | 2007-05-10 16:54:38 -0500 | [diff] [blame] | 842 | */ |
| 843 | |
Andrew Price | 4306629 | 2012-04-16 16:40:55 +0100 | [diff] [blame] | 844 | static int read_rindex_entry(struct gfs2_inode *ip) |
Robert Peterson | 6c53267 | 2007-05-10 16:54:38 -0500 | [diff] [blame] | 845 | { |
| 846 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
| 847 | loff_t pos = sdp->sd_rgrps * sizeof(struct gfs2_rindex); |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 848 | struct gfs2_rindex buf; |
Robert Peterson | 6c53267 | 2007-05-10 16:54:38 -0500 | [diff] [blame] | 849 | int error; |
| 850 | struct gfs2_rgrpd *rgd; |
| 851 | |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 852 | if (pos >= i_size_read(&ip->i_inode)) |
| 853 | return 1; |
| 854 | |
Andrew Price | 4306629 | 2012-04-16 16:40:55 +0100 | [diff] [blame] | 855 | error = gfs2_internal_read(ip, (char *)&buf, &pos, |
Robert Peterson | 6c53267 | 2007-05-10 16:54:38 -0500 | [diff] [blame] | 856 | sizeof(struct gfs2_rindex)); |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 857 | |
| 858 | if (error != sizeof(struct gfs2_rindex)) |
| 859 | return (error == 0) ? 1 : error; |
Robert Peterson | 6c53267 | 2007-05-10 16:54:38 -0500 | [diff] [blame] | 860 | |
Bob Peterson | 6bdd9be | 2008-01-28 17:20:26 -0600 | [diff] [blame] | 861 | rgd = kmem_cache_zalloc(gfs2_rgrpd_cachep, GFP_NOFS); |
Robert Peterson | 6c53267 | 2007-05-10 16:54:38 -0500 | [diff] [blame] | 862 | error = -ENOMEM; |
| 863 | if (!rgd) |
| 864 | return error; |
| 865 | |
Robert Peterson | 6c53267 | 2007-05-10 16:54:38 -0500 | [diff] [blame] | 866 | rgd->rd_sbd = sdp; |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 867 | rgd->rd_addr = be64_to_cpu(buf.ri_addr); |
| 868 | rgd->rd_length = be32_to_cpu(buf.ri_length); |
| 869 | rgd->rd_data0 = be64_to_cpu(buf.ri_data0); |
| 870 | rgd->rd_data = be32_to_cpu(buf.ri_data); |
| 871 | rgd->rd_bitbytes = be32_to_cpu(buf.ri_bitbytes); |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 872 | spin_lock_init(&rgd->rd_rsspin); |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 873 | |
Robert Peterson | 6c53267 | 2007-05-10 16:54:38 -0500 | [diff] [blame] | 874 | error = compute_bitstructs(rgd); |
| 875 | if (error) |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 876 | goto fail; |
Robert Peterson | 6c53267 | 2007-05-10 16:54:38 -0500 | [diff] [blame] | 877 | |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 878 | error = gfs2_glock_get(sdp, rgd->rd_addr, |
Robert Peterson | 6c53267 | 2007-05-10 16:54:38 -0500 | [diff] [blame] | 879 | &gfs2_rgrp_glops, CREATE, &rgd->rd_gl); |
| 880 | if (error) |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 881 | goto fail; |
Robert Peterson | 6c53267 | 2007-05-10 16:54:38 -0500 | [diff] [blame] | 882 | |
| 883 | rgd->rd_gl->gl_object = rgd; |
David Teigland | 4e2f884 | 2012-11-14 13:47:37 -0500 | [diff] [blame] | 884 | rgd->rd_rgl = (struct gfs2_rgrp_lvb *)rgd->rd_gl->gl_lksb.sb_lvbptr; |
Bob Peterson | cf45b75 | 2008-01-31 10:31:39 -0600 | [diff] [blame] | 885 | rgd->rd_flags &= ~GFS2_RDF_UPTODATE; |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 886 | if (rgd->rd_data > sdp->sd_max_rg_data) |
| 887 | sdp->sd_max_rg_data = rgd->rd_data; |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 888 | spin_lock(&sdp->sd_rindex_spin); |
Bob Peterson | 6aad1c3 | 2012-03-05 09:20:59 -0500 | [diff] [blame] | 889 | error = rgd_insert(rgd); |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 890 | spin_unlock(&sdp->sd_rindex_spin); |
Bob Peterson | 6aad1c3 | 2012-03-05 09:20:59 -0500 | [diff] [blame] | 891 | if (!error) |
| 892 | return 0; |
| 893 | |
| 894 | error = 0; /* someone else read in the rgrp; free it and ignore it */ |
Bob Peterson | c1ac539 | 2012-03-22 08:58:30 -0400 | [diff] [blame] | 895 | gfs2_glock_put(rgd->rd_gl); |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 896 | |
| 897 | fail: |
| 898 | kfree(rgd->rd_bits); |
| 899 | kmem_cache_free(gfs2_rgrpd_cachep, rgd); |
Robert Peterson | 6c53267 | 2007-05-10 16:54:38 -0500 | [diff] [blame] | 900 | return error; |
| 901 | } |
| 902 | |
| 903 | /** |
| 904 | * gfs2_ri_update - Pull in a new resource index from the disk |
| 905 | * @ip: pointer to the rindex inode |
| 906 | * |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 907 | * Returns: 0 on successful update, error code otherwise |
| 908 | */ |
| 909 | |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 910 | static int gfs2_ri_update(struct gfs2_inode *ip) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 911 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 912 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 913 | int error; |
| 914 | |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 915 | do { |
Andrew Price | 4306629 | 2012-04-16 16:40:55 +0100 | [diff] [blame] | 916 | error = read_rindex_entry(ip); |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 917 | } while (error == 0); |
| 918 | |
| 919 | if (error < 0) |
| 920 | return error; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 921 | |
Bob Peterson | cf45b75 | 2008-01-31 10:31:39 -0600 | [diff] [blame] | 922 | sdp->sd_rindex_uptodate = 1; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 923 | return 0; |
Robert Peterson | 6c53267 | 2007-05-10 16:54:38 -0500 | [diff] [blame] | 924 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 925 | |
Robert Peterson | 6c53267 | 2007-05-10 16:54:38 -0500 | [diff] [blame] | 926 | /** |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 927 | * gfs2_rindex_update - Update the rindex if required |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 928 | * @sdp: The GFS2 superblock |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 929 | * |
| 930 | * We grab a lock on the rindex inode to make sure that it doesn't |
| 931 | * change whilst we are performing an operation. We keep this lock |
| 932 | * for quite long periods of time compared to other locks. This |
| 933 | * doesn't matter, since it is shared and it is very, very rarely |
| 934 | * accessed in the exclusive mode (i.e. only when expanding the filesystem). |
| 935 | * |
| 936 | * This makes sure that we're using the latest copy of the resource index |
| 937 | * special file, which might have been updated if someone expanded the |
| 938 | * filesystem (via gfs2_grow utility), which adds new resource groups. |
| 939 | * |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 940 | * Returns: 0 on succeess, error code otherwise |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 941 | */ |
| 942 | |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 943 | int gfs2_rindex_update(struct gfs2_sbd *sdp) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 944 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 945 | struct gfs2_inode *ip = GFS2_I(sdp->sd_rindex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 946 | struct gfs2_glock *gl = ip->i_gl; |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 947 | struct gfs2_holder ri_gh; |
| 948 | int error = 0; |
Steven Whitehouse | a365fbf | 2012-02-24 15:09:14 +0000 | [diff] [blame] | 949 | int unlock_required = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 950 | |
| 951 | /* Read new copy from disk if we don't have the latest */ |
Bob Peterson | cf45b75 | 2008-01-31 10:31:39 -0600 | [diff] [blame] | 952 | if (!sdp->sd_rindex_uptodate) { |
Steven Whitehouse | a365fbf | 2012-02-24 15:09:14 +0000 | [diff] [blame] | 953 | if (!gfs2_glock_is_locked_by_me(gl)) { |
| 954 | error = gfs2_glock_nq_init(gl, LM_ST_SHARED, 0, &ri_gh); |
| 955 | if (error) |
Bob Peterson | 6aad1c3 | 2012-03-05 09:20:59 -0500 | [diff] [blame] | 956 | return error; |
Steven Whitehouse | a365fbf | 2012-02-24 15:09:14 +0000 | [diff] [blame] | 957 | unlock_required = 1; |
| 958 | } |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 959 | if (!sdp->sd_rindex_uptodate) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 960 | error = gfs2_ri_update(ip); |
Steven Whitehouse | a365fbf | 2012-02-24 15:09:14 +0000 | [diff] [blame] | 961 | if (unlock_required) |
| 962 | gfs2_glock_dq_uninit(&ri_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 963 | } |
| 964 | |
| 965 | return error; |
| 966 | } |
| 967 | |
Bob Peterson | 42d52e3 | 2008-01-28 18:38:07 -0600 | [diff] [blame] | 968 | static void gfs2_rgrp_in(struct gfs2_rgrpd *rgd, const void *buf) |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 969 | { |
| 970 | const struct gfs2_rgrp *str = buf; |
Bob Peterson | 42d52e3 | 2008-01-28 18:38:07 -0600 | [diff] [blame] | 971 | u32 rg_flags; |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 972 | |
Bob Peterson | 42d52e3 | 2008-01-28 18:38:07 -0600 | [diff] [blame] | 973 | rg_flags = be32_to_cpu(str->rg_flags); |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 974 | rg_flags &= ~GFS2_RDF_MASK; |
Steven Whitehouse | 1ce97e5 | 2009-05-21 15:18:19 +0100 | [diff] [blame] | 975 | rgd->rd_flags &= GFS2_RDF_MASK; |
| 976 | rgd->rd_flags |= rg_flags; |
Steven Whitehouse | cfc8b54 | 2008-11-04 10:25:13 +0000 | [diff] [blame] | 977 | rgd->rd_free = be32_to_cpu(str->rg_free); |
Steven Whitehouse | 73f7494 | 2008-11-04 10:32:57 +0000 | [diff] [blame] | 978 | rgd->rd_dinodes = be32_to_cpu(str->rg_dinodes); |
Steven Whitehouse | d8b71f7 | 2008-11-04 10:19:03 +0000 | [diff] [blame] | 979 | rgd->rd_igeneration = be64_to_cpu(str->rg_igeneration); |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 980 | } |
| 981 | |
Bob Peterson | 42d52e3 | 2008-01-28 18:38:07 -0600 | [diff] [blame] | 982 | static void gfs2_rgrp_out(struct gfs2_rgrpd *rgd, void *buf) |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 983 | { |
| 984 | struct gfs2_rgrp *str = buf; |
| 985 | |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 986 | str->rg_flags = cpu_to_be32(rgd->rd_flags & ~GFS2_RDF_MASK); |
Steven Whitehouse | cfc8b54 | 2008-11-04 10:25:13 +0000 | [diff] [blame] | 987 | str->rg_free = cpu_to_be32(rgd->rd_free); |
Steven Whitehouse | 73f7494 | 2008-11-04 10:32:57 +0000 | [diff] [blame] | 988 | str->rg_dinodes = cpu_to_be32(rgd->rd_dinodes); |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 989 | str->__pad = cpu_to_be32(0); |
Steven Whitehouse | d8b71f7 | 2008-11-04 10:19:03 +0000 | [diff] [blame] | 990 | str->rg_igeneration = cpu_to_be64(rgd->rd_igeneration); |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 991 | memset(&str->rg_reserved, 0, sizeof(str->rg_reserved)); |
| 992 | } |
| 993 | |
Benjamin Marzinski | 90306c4 | 2012-05-29 23:01:09 -0500 | [diff] [blame] | 994 | static int gfs2_rgrp_lvb_valid(struct gfs2_rgrpd *rgd) |
| 995 | { |
| 996 | struct gfs2_rgrp_lvb *rgl = rgd->rd_rgl; |
| 997 | struct gfs2_rgrp *str = (struct gfs2_rgrp *)rgd->rd_bits[0].bi_bh->b_data; |
| 998 | |
| 999 | if (rgl->rl_flags != str->rg_flags || rgl->rl_free != str->rg_free || |
| 1000 | rgl->rl_dinodes != str->rg_dinodes || |
| 1001 | rgl->rl_igeneration != str->rg_igeneration) |
| 1002 | return 0; |
| 1003 | return 1; |
| 1004 | } |
| 1005 | |
| 1006 | static void gfs2_rgrp_ondisk2lvb(struct gfs2_rgrp_lvb *rgl, const void *buf) |
| 1007 | { |
| 1008 | const struct gfs2_rgrp *str = buf; |
| 1009 | |
| 1010 | rgl->rl_magic = cpu_to_be32(GFS2_MAGIC); |
| 1011 | rgl->rl_flags = str->rg_flags; |
| 1012 | rgl->rl_free = str->rg_free; |
| 1013 | rgl->rl_dinodes = str->rg_dinodes; |
| 1014 | rgl->rl_igeneration = str->rg_igeneration; |
| 1015 | rgl->__pad = 0UL; |
| 1016 | } |
| 1017 | |
| 1018 | static void update_rgrp_lvb_unlinked(struct gfs2_rgrpd *rgd, u32 change) |
| 1019 | { |
| 1020 | struct gfs2_rgrp_lvb *rgl = rgd->rd_rgl; |
| 1021 | u32 unlinked = be32_to_cpu(rgl->rl_unlinked) + change; |
| 1022 | rgl->rl_unlinked = cpu_to_be32(unlinked); |
| 1023 | } |
| 1024 | |
| 1025 | static u32 count_unlinked(struct gfs2_rgrpd *rgd) |
| 1026 | { |
| 1027 | struct gfs2_bitmap *bi; |
| 1028 | const u32 length = rgd->rd_length; |
| 1029 | const u8 *buffer = NULL; |
| 1030 | u32 i, goal, count = 0; |
| 1031 | |
| 1032 | for (i = 0, bi = rgd->rd_bits; i < length; i++, bi++) { |
| 1033 | goal = 0; |
| 1034 | buffer = bi->bi_bh->b_data + bi->bi_offset; |
| 1035 | WARN_ON(!buffer_uptodate(bi->bi_bh)); |
| 1036 | while (goal < bi->bi_len * GFS2_NBBY) { |
| 1037 | goal = gfs2_bitfit(buffer, bi->bi_len, goal, |
| 1038 | GFS2_BLKST_UNLINKED); |
| 1039 | if (goal == BFITNOENT) |
| 1040 | break; |
| 1041 | count++; |
| 1042 | goal++; |
| 1043 | } |
| 1044 | } |
| 1045 | |
| 1046 | return count; |
| 1047 | } |
| 1048 | |
| 1049 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1050 | /** |
Benjamin Marzinski | 90306c4 | 2012-05-29 23:01:09 -0500 | [diff] [blame] | 1051 | * gfs2_rgrp_bh_get - Read in a RG's header and bitmaps |
| 1052 | * @rgd: the struct gfs2_rgrpd describing the RG to read in |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1053 | * |
| 1054 | * Read in all of a Resource Group's header and bitmap blocks. |
| 1055 | * Caller must eventually call gfs2_rgrp_relse() to free the bitmaps. |
| 1056 | * |
| 1057 | * Returns: errno |
| 1058 | */ |
| 1059 | |
Benjamin Marzinski | 90306c4 | 2012-05-29 23:01:09 -0500 | [diff] [blame] | 1060 | int gfs2_rgrp_bh_get(struct gfs2_rgrpd *rgd) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1061 | { |
| 1062 | struct gfs2_sbd *sdp = rgd->rd_sbd; |
| 1063 | struct gfs2_glock *gl = rgd->rd_gl; |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 1064 | unsigned int length = rgd->rd_length; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1065 | struct gfs2_bitmap *bi; |
| 1066 | unsigned int x, y; |
| 1067 | int error; |
| 1068 | |
Benjamin Marzinski | 90306c4 | 2012-05-29 23:01:09 -0500 | [diff] [blame] | 1069 | if (rgd->rd_bits[0].bi_bh != NULL) |
| 1070 | return 0; |
| 1071 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1072 | for (x = 0; x < length; x++) { |
| 1073 | bi = rgd->rd_bits + x; |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 1074 | error = gfs2_meta_read(gl, rgd->rd_addr + x, 0, &bi->bi_bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1075 | if (error) |
| 1076 | goto fail; |
| 1077 | } |
| 1078 | |
| 1079 | for (y = length; y--;) { |
| 1080 | bi = rgd->rd_bits + y; |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 1081 | error = gfs2_meta_wait(sdp, bi->bi_bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1082 | if (error) |
| 1083 | goto fail; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1084 | if (gfs2_metatype_check(sdp, bi->bi_bh, y ? GFS2_METATYPE_RB : |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1085 | GFS2_METATYPE_RG)) { |
| 1086 | error = -EIO; |
| 1087 | goto fail; |
| 1088 | } |
| 1089 | } |
| 1090 | |
Bob Peterson | cf45b75 | 2008-01-31 10:31:39 -0600 | [diff] [blame] | 1091 | if (!(rgd->rd_flags & GFS2_RDF_UPTODATE)) { |
Steven Whitehouse | 60a0b8f | 2009-05-21 12:23:12 +0100 | [diff] [blame] | 1092 | for (x = 0; x < length; x++) |
| 1093 | clear_bit(GBF_FULL, &rgd->rd_bits[x].bi_flags); |
Bob Peterson | 42d52e3 | 2008-01-28 18:38:07 -0600 | [diff] [blame] | 1094 | gfs2_rgrp_in(rgd, (rgd->rd_bits[0].bi_bh)->b_data); |
Steven Whitehouse | 1ce97e5 | 2009-05-21 15:18:19 +0100 | [diff] [blame] | 1095 | rgd->rd_flags |= (GFS2_RDF_UPTODATE | GFS2_RDF_CHECK); |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 1096 | rgd->rd_free_clone = rgd->rd_free; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1097 | } |
Benjamin Marzinski | 90306c4 | 2012-05-29 23:01:09 -0500 | [diff] [blame] | 1098 | if (be32_to_cpu(GFS2_MAGIC) != rgd->rd_rgl->rl_magic) { |
| 1099 | rgd->rd_rgl->rl_unlinked = cpu_to_be32(count_unlinked(rgd)); |
| 1100 | gfs2_rgrp_ondisk2lvb(rgd->rd_rgl, |
| 1101 | rgd->rd_bits[0].bi_bh->b_data); |
| 1102 | } |
| 1103 | else if (sdp->sd_args.ar_rgrplvb) { |
| 1104 | if (!gfs2_rgrp_lvb_valid(rgd)){ |
| 1105 | gfs2_consist_rgrpd(rgd); |
| 1106 | error = -EIO; |
| 1107 | goto fail; |
| 1108 | } |
| 1109 | if (rgd->rd_rgl->rl_unlinked == 0) |
| 1110 | rgd->rd_flags &= ~GFS2_RDF_CHECK; |
| 1111 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1112 | return 0; |
| 1113 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1114 | fail: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1115 | while (x--) { |
| 1116 | bi = rgd->rd_bits + x; |
| 1117 | brelse(bi->bi_bh); |
| 1118 | bi->bi_bh = NULL; |
| 1119 | gfs2_assert_warn(sdp, !bi->bi_clone); |
| 1120 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1121 | |
| 1122 | return error; |
| 1123 | } |
| 1124 | |
Benjamin Marzinski | 90306c4 | 2012-05-29 23:01:09 -0500 | [diff] [blame] | 1125 | int update_rgrp_lvb(struct gfs2_rgrpd *rgd) |
| 1126 | { |
| 1127 | u32 rl_flags; |
| 1128 | |
| 1129 | if (rgd->rd_flags & GFS2_RDF_UPTODATE) |
| 1130 | return 0; |
| 1131 | |
| 1132 | if (be32_to_cpu(GFS2_MAGIC) != rgd->rd_rgl->rl_magic) |
| 1133 | return gfs2_rgrp_bh_get(rgd); |
| 1134 | |
| 1135 | rl_flags = be32_to_cpu(rgd->rd_rgl->rl_flags); |
| 1136 | rl_flags &= ~GFS2_RDF_MASK; |
| 1137 | rgd->rd_flags &= GFS2_RDF_MASK; |
| 1138 | rgd->rd_flags |= (rl_flags | GFS2_RDF_UPTODATE | GFS2_RDF_CHECK); |
| 1139 | if (rgd->rd_rgl->rl_unlinked == 0) |
| 1140 | rgd->rd_flags &= ~GFS2_RDF_CHECK; |
| 1141 | rgd->rd_free = be32_to_cpu(rgd->rd_rgl->rl_free); |
| 1142 | rgd->rd_free_clone = rgd->rd_free; |
| 1143 | rgd->rd_dinodes = be32_to_cpu(rgd->rd_rgl->rl_dinodes); |
| 1144 | rgd->rd_igeneration = be64_to_cpu(rgd->rd_rgl->rl_igeneration); |
| 1145 | return 0; |
| 1146 | } |
| 1147 | |
| 1148 | int gfs2_rgrp_go_lock(struct gfs2_holder *gh) |
| 1149 | { |
| 1150 | struct gfs2_rgrpd *rgd = gh->gh_gl->gl_object; |
| 1151 | struct gfs2_sbd *sdp = rgd->rd_sbd; |
| 1152 | |
| 1153 | if (gh->gh_flags & GL_SKIP && sdp->sd_args.ar_rgrplvb) |
| 1154 | return 0; |
| 1155 | return gfs2_rgrp_bh_get((struct gfs2_rgrpd *)gh->gh_gl->gl_object); |
| 1156 | } |
| 1157 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1158 | /** |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 1159 | * gfs2_rgrp_go_unlock - Release RG bitmaps read in with gfs2_rgrp_bh_get() |
Bob Peterson | 886b141 | 2012-04-11 13:03:52 -0400 | [diff] [blame] | 1160 | * @gh: The glock holder for the resource group |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1161 | * |
| 1162 | */ |
| 1163 | |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 1164 | void gfs2_rgrp_go_unlock(struct gfs2_holder *gh) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1165 | { |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 1166 | struct gfs2_rgrpd *rgd = gh->gh_gl->gl_object; |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 1167 | int x, length = rgd->rd_length; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1168 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1169 | for (x = 0; x < length; x++) { |
| 1170 | struct gfs2_bitmap *bi = rgd->rd_bits + x; |
Benjamin Marzinski | 90306c4 | 2012-05-29 23:01:09 -0500 | [diff] [blame] | 1171 | if (bi->bi_bh) { |
| 1172 | brelse(bi->bi_bh); |
| 1173 | bi->bi_bh = NULL; |
| 1174 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1175 | } |
| 1176 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1177 | } |
| 1178 | |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 1179 | int gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset, |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 1180 | struct buffer_head *bh, |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 1181 | const struct gfs2_bitmap *bi, unsigned minlen, u64 *ptrimmed) |
Steven Whitehouse | f15ab56 | 2009-02-09 09:25:01 +0000 | [diff] [blame] | 1182 | { |
| 1183 | struct super_block *sb = sdp->sd_vfs; |
| 1184 | struct block_device *bdev = sb->s_bdev; |
| 1185 | const unsigned int sects_per_blk = sdp->sd_sb.sb_bsize / |
Martin K. Petersen | e1defc4 | 2009-05-22 17:17:49 -0400 | [diff] [blame] | 1186 | bdev_logical_block_size(sb->s_bdev); |
Steven Whitehouse | f15ab56 | 2009-02-09 09:25:01 +0000 | [diff] [blame] | 1187 | u64 blk; |
Steven Whitehouse | 64d576b | 2009-02-12 13:31:58 +0000 | [diff] [blame] | 1188 | sector_t start = 0; |
Steven Whitehouse | f15ab56 | 2009-02-09 09:25:01 +0000 | [diff] [blame] | 1189 | sector_t nr_sects = 0; |
| 1190 | int rv; |
| 1191 | unsigned int x; |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 1192 | u32 trimmed = 0; |
| 1193 | u8 diff; |
Steven Whitehouse | f15ab56 | 2009-02-09 09:25:01 +0000 | [diff] [blame] | 1194 | |
| 1195 | for (x = 0; x < bi->bi_len; x++) { |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 1196 | const u8 *clone = bi->bi_clone ? bi->bi_clone : bi->bi_bh->b_data; |
| 1197 | clone += bi->bi_offset; |
| 1198 | clone += x; |
| 1199 | if (bh) { |
| 1200 | const u8 *orig = bh->b_data + bi->bi_offset + x; |
| 1201 | diff = ~(*orig | (*orig >> 1)) & (*clone | (*clone >> 1)); |
| 1202 | } else { |
| 1203 | diff = ~(*clone | (*clone >> 1)); |
| 1204 | } |
Steven Whitehouse | f15ab56 | 2009-02-09 09:25:01 +0000 | [diff] [blame] | 1205 | diff &= 0x55; |
| 1206 | if (diff == 0) |
| 1207 | continue; |
| 1208 | blk = offset + ((bi->bi_start + x) * GFS2_NBBY); |
| 1209 | blk *= sects_per_blk; /* convert to sectors */ |
| 1210 | while(diff) { |
| 1211 | if (diff & 1) { |
| 1212 | if (nr_sects == 0) |
| 1213 | goto start_new_extent; |
| 1214 | if ((start + nr_sects) != blk) { |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 1215 | if (nr_sects >= minlen) { |
| 1216 | rv = blkdev_issue_discard(bdev, |
| 1217 | start, nr_sects, |
| 1218 | GFP_NOFS, 0); |
| 1219 | if (rv) |
| 1220 | goto fail; |
| 1221 | trimmed += nr_sects; |
| 1222 | } |
Steven Whitehouse | f15ab56 | 2009-02-09 09:25:01 +0000 | [diff] [blame] | 1223 | nr_sects = 0; |
| 1224 | start_new_extent: |
| 1225 | start = blk; |
| 1226 | } |
| 1227 | nr_sects += sects_per_blk; |
| 1228 | } |
| 1229 | diff >>= 2; |
| 1230 | blk += sects_per_blk; |
| 1231 | } |
| 1232 | } |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 1233 | if (nr_sects >= minlen) { |
Christoph Hellwig | dd3932e | 2010-09-16 20:51:46 +0200 | [diff] [blame] | 1234 | rv = blkdev_issue_discard(bdev, start, nr_sects, GFP_NOFS, 0); |
Steven Whitehouse | f15ab56 | 2009-02-09 09:25:01 +0000 | [diff] [blame] | 1235 | if (rv) |
| 1236 | goto fail; |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 1237 | trimmed += nr_sects; |
Steven Whitehouse | f15ab56 | 2009-02-09 09:25:01 +0000 | [diff] [blame] | 1238 | } |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 1239 | if (ptrimmed) |
| 1240 | *ptrimmed = trimmed; |
| 1241 | return 0; |
| 1242 | |
Steven Whitehouse | f15ab56 | 2009-02-09 09:25:01 +0000 | [diff] [blame] | 1243 | fail: |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 1244 | if (sdp->sd_args.ar_discard) |
| 1245 | fs_warn(sdp, "error %d on discard request, turning discards off for this filesystem", rv); |
Steven Whitehouse | f15ab56 | 2009-02-09 09:25:01 +0000 | [diff] [blame] | 1246 | sdp->sd_args.ar_discard = 0; |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 1247 | return -EIO; |
| 1248 | } |
| 1249 | |
| 1250 | /** |
| 1251 | * gfs2_fitrim - Generate discard requests for unused bits of the filesystem |
| 1252 | * @filp: Any file on the filesystem |
| 1253 | * @argp: Pointer to the arguments (also used to pass result) |
| 1254 | * |
| 1255 | * Returns: 0 on success, otherwise error code |
| 1256 | */ |
| 1257 | |
| 1258 | int gfs2_fitrim(struct file *filp, void __user *argp) |
| 1259 | { |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 1260 | struct inode *inode = file_inode(filp); |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 1261 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
| 1262 | struct request_queue *q = bdev_get_queue(sdp->sd_vfs->s_bdev); |
| 1263 | struct buffer_head *bh; |
| 1264 | struct gfs2_rgrpd *rgd; |
| 1265 | struct gfs2_rgrpd *rgd_end; |
| 1266 | struct gfs2_holder gh; |
| 1267 | struct fstrim_range r; |
| 1268 | int ret = 0; |
| 1269 | u64 amt; |
| 1270 | u64 trimmed = 0; |
Lukas Czerner | 076f0fa | 2012-10-16 11:39:08 +0200 | [diff] [blame] | 1271 | u64 start, end, minlen; |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 1272 | unsigned int x; |
Lukas Czerner | 076f0fa | 2012-10-16 11:39:08 +0200 | [diff] [blame] | 1273 | unsigned bs_shift = sdp->sd_sb.sb_bsize_shift; |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 1274 | |
| 1275 | if (!capable(CAP_SYS_ADMIN)) |
| 1276 | return -EPERM; |
| 1277 | |
| 1278 | if (!blk_queue_discard(q)) |
| 1279 | return -EOPNOTSUPP; |
| 1280 | |
Lukas Czerner | 3a238ad | 2012-10-16 11:39:07 +0200 | [diff] [blame] | 1281 | if (copy_from_user(&r, argp, sizeof(r))) |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 1282 | return -EFAULT; |
| 1283 | |
Bob Peterson | 5e2f7d6 | 2012-04-04 22:11:16 -0400 | [diff] [blame] | 1284 | ret = gfs2_rindex_update(sdp); |
| 1285 | if (ret) |
| 1286 | return ret; |
| 1287 | |
Lukas Czerner | 076f0fa | 2012-10-16 11:39:08 +0200 | [diff] [blame] | 1288 | start = r.start >> bs_shift; |
| 1289 | end = start + (r.len >> bs_shift); |
| 1290 | minlen = max_t(u64, r.minlen, |
| 1291 | q->limits.discard_granularity) >> bs_shift; |
| 1292 | |
| 1293 | rgd = gfs2_blk2rgrpd(sdp, start, 0); |
| 1294 | rgd_end = gfs2_blk2rgrpd(sdp, end - 1, 0); |
| 1295 | |
| 1296 | if (end <= start || |
| 1297 | minlen > sdp->sd_max_rg_data || |
| 1298 | start > rgd_end->rd_data0 + rgd_end->rd_data) |
| 1299 | return -EINVAL; |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 1300 | |
| 1301 | while (1) { |
| 1302 | |
| 1303 | ret = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh); |
| 1304 | if (ret) |
| 1305 | goto out; |
| 1306 | |
| 1307 | if (!(rgd->rd_flags & GFS2_RGF_TRIMMED)) { |
| 1308 | /* Trim each bitmap in the rgrp */ |
| 1309 | for (x = 0; x < rgd->rd_length; x++) { |
| 1310 | struct gfs2_bitmap *bi = rgd->rd_bits + x; |
Lukas Czerner | 076f0fa | 2012-10-16 11:39:08 +0200 | [diff] [blame] | 1311 | ret = gfs2_rgrp_send_discards(sdp, |
| 1312 | rgd->rd_data0, NULL, bi, minlen, |
| 1313 | &amt); |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 1314 | if (ret) { |
| 1315 | gfs2_glock_dq_uninit(&gh); |
| 1316 | goto out; |
| 1317 | } |
| 1318 | trimmed += amt; |
| 1319 | } |
| 1320 | |
| 1321 | /* Mark rgrp as having been trimmed */ |
| 1322 | ret = gfs2_trans_begin(sdp, RES_RG_HDR, 0); |
| 1323 | if (ret == 0) { |
| 1324 | bh = rgd->rd_bits[0].bi_bh; |
| 1325 | rgd->rd_flags |= GFS2_RGF_TRIMMED; |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 1326 | gfs2_trans_add_meta(rgd->rd_gl, bh); |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 1327 | gfs2_rgrp_out(rgd, bh->b_data); |
Benjamin Marzinski | 90306c4 | 2012-05-29 23:01:09 -0500 | [diff] [blame] | 1328 | gfs2_rgrp_ondisk2lvb(rgd->rd_rgl, bh->b_data); |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 1329 | gfs2_trans_end(sdp); |
| 1330 | } |
| 1331 | } |
| 1332 | gfs2_glock_dq_uninit(&gh); |
| 1333 | |
| 1334 | if (rgd == rgd_end) |
| 1335 | break; |
| 1336 | |
| 1337 | rgd = gfs2_rgrpd_get_next(rgd); |
| 1338 | } |
| 1339 | |
| 1340 | out: |
| 1341 | r.len = trimmed << 9; |
Lukas Czerner | 3a238ad | 2012-10-16 11:39:07 +0200 | [diff] [blame] | 1342 | if (copy_to_user(argp, &r, sizeof(r))) |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 1343 | return -EFAULT; |
| 1344 | |
| 1345 | return ret; |
Steven Whitehouse | f15ab56 | 2009-02-09 09:25:01 +0000 | [diff] [blame] | 1346 | } |
| 1347 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1348 | /** |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1349 | * rs_insert - insert a new multi-block reservation into the rgrp's rb_tree |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1350 | * @ip: the inode structure |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1351 | * |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1352 | */ |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1353 | static void rs_insert(struct gfs2_inode *ip) |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1354 | { |
| 1355 | struct rb_node **newn, *parent = NULL; |
| 1356 | int rc; |
| 1357 | struct gfs2_blkreserv *rs = ip->i_res; |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 1358 | struct gfs2_rgrpd *rgd = rs->rs_rbm.rgd; |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1359 | u64 fsblock = gfs2_rbm_to_block(&rs->rs_rbm); |
| 1360 | |
| 1361 | BUG_ON(gfs2_rs_active(rs)); |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1362 | |
| 1363 | spin_lock(&rgd->rd_rsspin); |
| 1364 | newn = &rgd->rd_rstree.rb_node; |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1365 | while (*newn) { |
| 1366 | struct gfs2_blkreserv *cur = |
| 1367 | rb_entry(*newn, struct gfs2_blkreserv, rs_node); |
| 1368 | |
| 1369 | parent = *newn; |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1370 | rc = rs_cmp(fsblock, rs->rs_free, cur); |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1371 | if (rc > 0) |
| 1372 | newn = &((*newn)->rb_right); |
| 1373 | else if (rc < 0) |
| 1374 | newn = &((*newn)->rb_left); |
| 1375 | else { |
| 1376 | spin_unlock(&rgd->rd_rsspin); |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1377 | WARN_ON(1); |
| 1378 | return; |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1379 | } |
| 1380 | } |
| 1381 | |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1382 | rb_link_node(&rs->rs_node, parent, newn); |
| 1383 | rb_insert_color(&rs->rs_node, &rgd->rd_rstree); |
| 1384 | |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1385 | /* Do our rgrp accounting for the reservation */ |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1386 | rgd->rd_reserved += rs->rs_free; /* blocks reserved */ |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1387 | spin_unlock(&rgd->rd_rsspin); |
Steven Whitehouse | 9e733d3 | 2012-08-23 15:37:59 +0100 | [diff] [blame] | 1388 | trace_gfs2_rs(rs, TRACE_RS_INSERT); |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1389 | } |
| 1390 | |
| 1391 | /** |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1392 | * rg_mblk_search - find a group of multiple free blocks to form a reservation |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1393 | * @rgd: the resource group descriptor |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1394 | * @ip: pointer to the inode for which we're reserving blocks |
Steven Whitehouse | c743ffd | 2012-08-25 18:21:47 +0100 | [diff] [blame] | 1395 | * @requested: number of blocks required for this allocation |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1396 | * |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1397 | */ |
| 1398 | |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1399 | static void rg_mblk_search(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip, |
| 1400 | unsigned requested) |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1401 | { |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1402 | struct gfs2_rbm rbm = { .rgd = rgd, }; |
| 1403 | u64 goal; |
| 1404 | struct gfs2_blkreserv *rs = ip->i_res; |
| 1405 | u32 extlen; |
| 1406 | u32 free_blocks = rgd->rd_free_clone - rgd->rd_reserved; |
| 1407 | int ret; |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1408 | |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1409 | extlen = max_t(u32, atomic_read(&rs->rs_sizehint), requested); |
| 1410 | extlen = clamp(extlen, RGRP_RSRV_MINBLKS, free_blocks); |
| 1411 | if ((rgd->rd_free_clone < rgd->rd_reserved) || (free_blocks < extlen)) |
Steven Whitehouse | c743ffd | 2012-08-25 18:21:47 +0100 | [diff] [blame] | 1412 | return; |
| 1413 | |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1414 | /* Find bitmap block that contains bits for goal block */ |
| 1415 | if (rgrp_contains_block(rgd, ip->i_goal)) |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1416 | goal = ip->i_goal; |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1417 | else |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1418 | goal = rgd->rd_last_alloc + rgd->rd_data0; |
Steven Whitehouse | c743ffd | 2012-08-25 18:21:47 +0100 | [diff] [blame] | 1419 | |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1420 | if (WARN_ON(gfs2_rbm_from_block(&rbm, goal))) |
| 1421 | return; |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1422 | |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1423 | ret = gfs2_rbm_find(&rbm, GFS2_BLKST_FREE, extlen, ip, true); |
| 1424 | if (ret == 0) { |
| 1425 | rs->rs_rbm = rbm; |
| 1426 | rs->rs_free = extlen; |
| 1427 | rs->rs_inum = ip->i_no_addr; |
| 1428 | rs_insert(ip); |
Bob Peterson | 13d2eb0 | 2012-12-20 13:23:04 -0500 | [diff] [blame] | 1429 | } else { |
| 1430 | if (goal == rgd->rd_last_alloc + rgd->rd_data0) |
| 1431 | rgd->rd_last_alloc = 0; |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1432 | } |
Bob Peterson | b3e47ca | 2011-11-21 11:47:08 -0500 | [diff] [blame] | 1433 | } |
| 1434 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1435 | /** |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1436 | * gfs2_next_unreserved_block - Return next block that is not reserved |
| 1437 | * @rgd: The resource group |
| 1438 | * @block: The starting block |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1439 | * @length: The required length |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1440 | * @ip: Ignore any reservations for this inode |
| 1441 | * |
| 1442 | * If the block does not appear in any reservation, then return the |
| 1443 | * block number unchanged. If it does appear in the reservation, then |
| 1444 | * keep looking through the tree of reservations in order to find the |
| 1445 | * first block number which is not reserved. |
| 1446 | */ |
| 1447 | |
| 1448 | static u64 gfs2_next_unreserved_block(struct gfs2_rgrpd *rgd, u64 block, |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1449 | u32 length, |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1450 | const struct gfs2_inode *ip) |
| 1451 | { |
| 1452 | struct gfs2_blkreserv *rs; |
| 1453 | struct rb_node *n; |
| 1454 | int rc; |
| 1455 | |
| 1456 | spin_lock(&rgd->rd_rsspin); |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1457 | n = rgd->rd_rstree.rb_node; |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1458 | while (n) { |
| 1459 | rs = rb_entry(n, struct gfs2_blkreserv, rs_node); |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1460 | rc = rs_cmp(block, length, rs); |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1461 | if (rc < 0) |
| 1462 | n = n->rb_left; |
| 1463 | else if (rc > 0) |
| 1464 | n = n->rb_right; |
| 1465 | else |
| 1466 | break; |
| 1467 | } |
| 1468 | |
| 1469 | if (n) { |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1470 | while ((rs_cmp(block, length, rs) == 0) && (ip->i_res != rs)) { |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1471 | block = gfs2_rbm_to_block(&rs->rs_rbm) + rs->rs_free; |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1472 | n = n->rb_right; |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1473 | if (n == NULL) |
| 1474 | break; |
| 1475 | rs = rb_entry(n, struct gfs2_blkreserv, rs_node); |
| 1476 | } |
| 1477 | } |
| 1478 | |
| 1479 | spin_unlock(&rgd->rd_rsspin); |
| 1480 | return block; |
| 1481 | } |
| 1482 | |
| 1483 | /** |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1484 | * gfs2_reservation_check_and_update - Check for reservations during block alloc |
| 1485 | * @rbm: The current position in the resource group |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1486 | * @ip: The inode for which we are searching for blocks |
| 1487 | * @minext: The minimum extent length |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1488 | * |
| 1489 | * This checks the current position in the rgrp to see whether there is |
| 1490 | * a reservation covering this block. If not then this function is a |
| 1491 | * no-op. If there is, then the position is moved to the end of the |
| 1492 | * contiguous reservation(s) so that we are pointing at the first |
| 1493 | * non-reserved block. |
| 1494 | * |
| 1495 | * Returns: 0 if no reservation, 1 if @rbm has changed, otherwise an error |
| 1496 | */ |
| 1497 | |
| 1498 | static int gfs2_reservation_check_and_update(struct gfs2_rbm *rbm, |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1499 | const struct gfs2_inode *ip, |
| 1500 | u32 minext) |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1501 | { |
| 1502 | u64 block = gfs2_rbm_to_block(rbm); |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1503 | u32 extlen = 1; |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1504 | u64 nblock; |
| 1505 | int ret; |
| 1506 | |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1507 | /* |
| 1508 | * If we have a minimum extent length, then skip over any extent |
| 1509 | * which is less than the min extent length in size. |
| 1510 | */ |
| 1511 | if (minext) { |
| 1512 | extlen = gfs2_free_extlen(rbm, minext); |
| 1513 | nblock = block + extlen; |
| 1514 | if (extlen < minext) |
| 1515 | goto fail; |
| 1516 | } |
| 1517 | |
| 1518 | /* |
| 1519 | * Check the extent which has been found against the reservations |
| 1520 | * and skip if parts of it are already reserved |
| 1521 | */ |
| 1522 | nblock = gfs2_next_unreserved_block(rbm->rgd, block, extlen, ip); |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1523 | if (nblock == block) |
| 1524 | return 0; |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1525 | fail: |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1526 | ret = gfs2_rbm_from_block(rbm, nblock); |
| 1527 | if (ret < 0) |
| 1528 | return ret; |
| 1529 | return 1; |
| 1530 | } |
| 1531 | |
| 1532 | /** |
| 1533 | * gfs2_rbm_find - Look for blocks of a particular state |
| 1534 | * @rbm: Value/result starting position and final position |
| 1535 | * @state: The state which we want to find |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1536 | * @minext: The requested extent length (0 for a single block) |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1537 | * @ip: If set, check for reservations |
| 1538 | * @nowrap: Stop looking at the end of the rgrp, rather than wrapping |
| 1539 | * around until we've reached the starting point. |
| 1540 | * |
| 1541 | * Side effects: |
| 1542 | * - If looking for free blocks, we set GBF_FULL on each bitmap which |
| 1543 | * has no free blocks in it. |
| 1544 | * |
| 1545 | * Returns: 0 on success, -ENOSPC if there is no block of the requested state |
| 1546 | */ |
| 1547 | |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1548 | static int gfs2_rbm_find(struct gfs2_rbm *rbm, u8 state, u32 minext, |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1549 | const struct gfs2_inode *ip, bool nowrap) |
| 1550 | { |
| 1551 | struct buffer_head *bh; |
| 1552 | struct gfs2_bitmap *initial_bi; |
| 1553 | u32 initial_offset; |
| 1554 | u32 offset; |
| 1555 | u8 *buffer; |
| 1556 | int index; |
| 1557 | int n = 0; |
| 1558 | int iters = rbm->rgd->rd_length; |
| 1559 | int ret; |
| 1560 | |
| 1561 | /* If we are not starting at the beginning of a bitmap, then we |
| 1562 | * need to add one to the bitmap count to ensure that we search |
| 1563 | * the starting bitmap twice. |
| 1564 | */ |
| 1565 | if (rbm->offset != 0) |
| 1566 | iters++; |
| 1567 | |
| 1568 | while(1) { |
| 1569 | if (test_bit(GBF_FULL, &rbm->bi->bi_flags) && |
| 1570 | (state == GFS2_BLKST_FREE)) |
| 1571 | goto next_bitmap; |
| 1572 | |
| 1573 | bh = rbm->bi->bi_bh; |
| 1574 | buffer = bh->b_data + rbm->bi->bi_offset; |
| 1575 | WARN_ON(!buffer_uptodate(bh)); |
| 1576 | if (state != GFS2_BLKST_UNLINKED && rbm->bi->bi_clone) |
| 1577 | buffer = rbm->bi->bi_clone + rbm->bi->bi_offset; |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1578 | initial_offset = rbm->offset; |
| 1579 | offset = gfs2_bitfit(buffer, rbm->bi->bi_len, rbm->offset, state); |
| 1580 | if (offset == BFITNOENT) |
| 1581 | goto bitmap_full; |
| 1582 | rbm->offset = offset; |
| 1583 | if (ip == NULL) |
| 1584 | return 0; |
| 1585 | |
| 1586 | initial_bi = rbm->bi; |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1587 | ret = gfs2_reservation_check_and_update(rbm, ip, minext); |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1588 | if (ret == 0) |
| 1589 | return 0; |
| 1590 | if (ret > 0) { |
| 1591 | n += (rbm->bi - initial_bi); |
Bob Peterson | 8d8b752 | 2012-08-07 13:28:17 -0400 | [diff] [blame] | 1592 | goto next_iter; |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1593 | } |
Steven Whitehouse | 5d50d53 | 2012-08-07 13:47:12 +0100 | [diff] [blame] | 1594 | if (ret == -E2BIG) { |
| 1595 | index = 0; |
| 1596 | rbm->offset = 0; |
| 1597 | n += (rbm->bi - initial_bi); |
| 1598 | goto res_covered_end_of_rgrp; |
| 1599 | } |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1600 | return ret; |
| 1601 | |
| 1602 | bitmap_full: /* Mark bitmap as full and fall through */ |
| 1603 | if ((state == GFS2_BLKST_FREE) && initial_offset == 0) |
| 1604 | set_bit(GBF_FULL, &rbm->bi->bi_flags); |
| 1605 | |
| 1606 | next_bitmap: /* Find next bitmap in the rgrp */ |
| 1607 | rbm->offset = 0; |
| 1608 | index = rbm->bi - rbm->rgd->rd_bits; |
| 1609 | index++; |
| 1610 | if (index == rbm->rgd->rd_length) |
| 1611 | index = 0; |
Steven Whitehouse | 5d50d53 | 2012-08-07 13:47:12 +0100 | [diff] [blame] | 1612 | res_covered_end_of_rgrp: |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1613 | rbm->bi = &rbm->rgd->rd_bits[index]; |
| 1614 | if ((index == 0) && nowrap) |
| 1615 | break; |
| 1616 | n++; |
Bob Peterson | 8d8b752 | 2012-08-07 13:28:17 -0400 | [diff] [blame] | 1617 | next_iter: |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1618 | if (n >= iters) |
| 1619 | break; |
| 1620 | } |
| 1621 | |
| 1622 | return -ENOSPC; |
| 1623 | } |
| 1624 | |
| 1625 | /** |
Steven Whitehouse | c8cdf47 | 2007-06-08 10:05:33 +0100 | [diff] [blame] | 1626 | * try_rgrp_unlink - Look for any unlinked, allocated, but unused inodes |
| 1627 | * @rgd: The rgrp |
Bob Peterson | 886b141 | 2012-04-11 13:03:52 -0400 | [diff] [blame] | 1628 | * @last_unlinked: block address of the last dinode we unlinked |
| 1629 | * @skip: block address we should explicitly not unlink |
Steven Whitehouse | c8cdf47 | 2007-06-08 10:05:33 +0100 | [diff] [blame] | 1630 | * |
Bob Peterson | 1a0eae8 | 2010-04-14 11:58:16 -0400 | [diff] [blame] | 1631 | * Returns: 0 if no error |
| 1632 | * The inode, if one has been found, in inode. |
Steven Whitehouse | c8cdf47 | 2007-06-08 10:05:33 +0100 | [diff] [blame] | 1633 | */ |
| 1634 | |
Steven Whitehouse | 044b941 | 2010-11-03 20:01:07 +0000 | [diff] [blame] | 1635 | static void try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked, u64 skip) |
Steven Whitehouse | c8cdf47 | 2007-06-08 10:05:33 +0100 | [diff] [blame] | 1636 | { |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1637 | u64 block; |
Bob Peterson | 5f3eae7 | 2007-08-08 16:52:09 -0500 | [diff] [blame] | 1638 | struct gfs2_sbd *sdp = rgd->rd_sbd; |
Steven Whitehouse | 044b941 | 2010-11-03 20:01:07 +0000 | [diff] [blame] | 1639 | struct gfs2_glock *gl; |
| 1640 | struct gfs2_inode *ip; |
| 1641 | int error; |
| 1642 | int found = 0; |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1643 | struct gfs2_rbm rbm = { .rgd = rgd, .bi = rgd->rd_bits, .offset = 0 }; |
Steven Whitehouse | c8cdf47 | 2007-06-08 10:05:33 +0100 | [diff] [blame] | 1644 | |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1645 | while (1) { |
Bob Peterson | 5f3eae7 | 2007-08-08 16:52:09 -0500 | [diff] [blame] | 1646 | down_write(&sdp->sd_log_flush_lock); |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 1647 | error = gfs2_rbm_find(&rbm, GFS2_BLKST_UNLINKED, 0, NULL, true); |
Bob Peterson | 5f3eae7 | 2007-08-08 16:52:09 -0500 | [diff] [blame] | 1648 | up_write(&sdp->sd_log_flush_lock); |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1649 | if (error == -ENOSPC) |
| 1650 | break; |
| 1651 | if (WARN_ON_ONCE(error)) |
Bob Peterson | 24c7387 | 2007-07-12 16:58:50 -0500 | [diff] [blame] | 1652 | break; |
Bob Peterson | b3e47ca | 2011-11-21 11:47:08 -0500 | [diff] [blame] | 1653 | |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1654 | block = gfs2_rbm_to_block(&rbm); |
| 1655 | if (gfs2_rbm_from_block(&rbm, block + 1)) |
| 1656 | break; |
| 1657 | if (*last_unlinked != NO_BLOCK && block <= *last_unlinked) |
Steven Whitehouse | c8cdf47 | 2007-06-08 10:05:33 +0100 | [diff] [blame] | 1658 | continue; |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1659 | if (block == skip) |
Steven Whitehouse | 1e19a19 | 2009-07-10 21:13:38 +0100 | [diff] [blame] | 1660 | continue; |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1661 | *last_unlinked = block; |
Steven Whitehouse | 044b941 | 2010-11-03 20:01:07 +0000 | [diff] [blame] | 1662 | |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 1663 | error = gfs2_glock_get(sdp, block, &gfs2_inode_glops, CREATE, &gl); |
Steven Whitehouse | 044b941 | 2010-11-03 20:01:07 +0000 | [diff] [blame] | 1664 | if (error) |
| 1665 | continue; |
| 1666 | |
| 1667 | /* If the inode is already in cache, we can ignore it here |
| 1668 | * because the existing inode disposal code will deal with |
| 1669 | * it when all refs have gone away. Accessing gl_object like |
| 1670 | * this is not safe in general. Here it is ok because we do |
| 1671 | * not dereference the pointer, and we only need an approx |
| 1672 | * answer to whether it is NULL or not. |
| 1673 | */ |
| 1674 | ip = gl->gl_object; |
| 1675 | |
| 1676 | if (ip || queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0) |
| 1677 | gfs2_glock_put(gl); |
| 1678 | else |
| 1679 | found++; |
| 1680 | |
| 1681 | /* Limit reclaim to sensible number of tasks */ |
Bob Peterson | 44ad37d | 2011-03-17 16:19:58 -0400 | [diff] [blame] | 1682 | if (found > NR_CPUS) |
Steven Whitehouse | 044b941 | 2010-11-03 20:01:07 +0000 | [diff] [blame] | 1683 | return; |
Steven Whitehouse | c8cdf47 | 2007-06-08 10:05:33 +0100 | [diff] [blame] | 1684 | } |
| 1685 | |
| 1686 | rgd->rd_flags &= ~GFS2_RDF_CHECK; |
Steven Whitehouse | 044b941 | 2010-11-03 20:01:07 +0000 | [diff] [blame] | 1687 | return; |
Steven Whitehouse | c8cdf47 | 2007-06-08 10:05:33 +0100 | [diff] [blame] | 1688 | } |
| 1689 | |
Steven Whitehouse | bcd97c0 | 2012-10-31 09:58:42 +0000 | [diff] [blame] | 1690 | /** |
| 1691 | * gfs2_rgrp_congested - Use stats to figure out whether an rgrp is congested |
| 1692 | * @rgd: The rgrp in question |
| 1693 | * @loops: An indication of how picky we can be (0=very, 1=less so) |
| 1694 | * |
| 1695 | * This function uses the recently added glock statistics in order to |
| 1696 | * figure out whether a parciular resource group is suffering from |
| 1697 | * contention from multiple nodes. This is done purely on the basis |
| 1698 | * of timings, since this is the only data we have to work with and |
| 1699 | * our aim here is to reject a resource group which is highly contended |
| 1700 | * but (very important) not to do this too often in order to ensure that |
| 1701 | * we do not land up introducing fragmentation by changing resource |
| 1702 | * groups when not actually required. |
| 1703 | * |
| 1704 | * The calculation is fairly simple, we want to know whether the SRTTB |
| 1705 | * (i.e. smoothed round trip time for blocking operations) to acquire |
| 1706 | * the lock for this rgrp's glock is significantly greater than the |
| 1707 | * time taken for resource groups on average. We introduce a margin in |
| 1708 | * the form of the variable @var which is computed as the sum of the two |
| 1709 | * respective variences, and multiplied by a factor depending on @loops |
| 1710 | * and whether we have a lot of data to base the decision on. This is |
| 1711 | * then tested against the square difference of the means in order to |
| 1712 | * decide whether the result is statistically significant or not. |
| 1713 | * |
| 1714 | * Returns: A boolean verdict on the congestion status |
| 1715 | */ |
| 1716 | |
| 1717 | static bool gfs2_rgrp_congested(const struct gfs2_rgrpd *rgd, int loops) |
| 1718 | { |
| 1719 | const struct gfs2_glock *gl = rgd->rd_gl; |
| 1720 | const struct gfs2_sbd *sdp = gl->gl_sbd; |
| 1721 | struct gfs2_lkstats *st; |
| 1722 | s64 r_dcount, l_dcount; |
| 1723 | s64 r_srttb, l_srttb; |
| 1724 | s64 srttb_diff; |
| 1725 | s64 sqr_diff; |
| 1726 | s64 var; |
| 1727 | |
| 1728 | preempt_disable(); |
| 1729 | st = &this_cpu_ptr(sdp->sd_lkstats)->lkstats[LM_TYPE_RGRP]; |
| 1730 | r_srttb = st->stats[GFS2_LKS_SRTTB]; |
| 1731 | r_dcount = st->stats[GFS2_LKS_DCOUNT]; |
| 1732 | var = st->stats[GFS2_LKS_SRTTVARB] + |
| 1733 | gl->gl_stats.stats[GFS2_LKS_SRTTVARB]; |
| 1734 | preempt_enable(); |
| 1735 | |
| 1736 | l_srttb = gl->gl_stats.stats[GFS2_LKS_SRTTB]; |
| 1737 | l_dcount = gl->gl_stats.stats[GFS2_LKS_DCOUNT]; |
| 1738 | |
| 1739 | if ((l_dcount < 1) || (r_dcount < 1) || (r_srttb == 0)) |
| 1740 | return false; |
| 1741 | |
| 1742 | srttb_diff = r_srttb - l_srttb; |
| 1743 | sqr_diff = srttb_diff * srttb_diff; |
| 1744 | |
| 1745 | var *= 2; |
| 1746 | if (l_dcount < 8 || r_dcount < 8) |
| 1747 | var *= 2; |
| 1748 | if (loops == 1) |
| 1749 | var *= 2; |
| 1750 | |
| 1751 | return ((srttb_diff < 0) && (sqr_diff > var)); |
| 1752 | } |
| 1753 | |
| 1754 | /** |
| 1755 | * gfs2_rgrp_used_recently |
| 1756 | * @rs: The block reservation with the rgrp to test |
| 1757 | * @msecs: The time limit in milliseconds |
| 1758 | * |
| 1759 | * Returns: True if the rgrp glock has been used within the time limit |
| 1760 | */ |
| 1761 | static bool gfs2_rgrp_used_recently(const struct gfs2_blkreserv *rs, |
| 1762 | u64 msecs) |
| 1763 | { |
| 1764 | u64 tdiff; |
| 1765 | |
| 1766 | tdiff = ktime_to_ns(ktime_sub(ktime_get_real(), |
| 1767 | rs->rs_rbm.rgd->rd_gl->gl_dstamp)); |
| 1768 | |
| 1769 | return tdiff > (msecs * 1000 * 1000); |
| 1770 | } |
| 1771 | |
Steven Whitehouse | 9dbe961 | 2012-10-31 10:37:10 +0000 | [diff] [blame] | 1772 | static u32 gfs2_orlov_skip(const struct gfs2_inode *ip) |
| 1773 | { |
| 1774 | const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
| 1775 | u32 skip; |
| 1776 | |
| 1777 | get_random_bytes(&skip, sizeof(skip)); |
| 1778 | return skip % sdp->sd_rgrps; |
| 1779 | } |
| 1780 | |
Steven Whitehouse | c743ffd | 2012-08-25 18:21:47 +0100 | [diff] [blame] | 1781 | static bool gfs2_select_rgrp(struct gfs2_rgrpd **pos, const struct gfs2_rgrpd *begin) |
| 1782 | { |
| 1783 | struct gfs2_rgrpd *rgd = *pos; |
Steven Whitehouse | aa8920c | 2012-11-13 14:50:35 +0000 | [diff] [blame] | 1784 | struct gfs2_sbd *sdp = rgd->rd_sbd; |
Steven Whitehouse | c743ffd | 2012-08-25 18:21:47 +0100 | [diff] [blame] | 1785 | |
| 1786 | rgd = gfs2_rgrpd_get_next(rgd); |
| 1787 | if (rgd == NULL) |
Steven Whitehouse | aa8920c | 2012-11-13 14:50:35 +0000 | [diff] [blame] | 1788 | rgd = gfs2_rgrpd_get_first(sdp); |
Steven Whitehouse | c743ffd | 2012-08-25 18:21:47 +0100 | [diff] [blame] | 1789 | *pos = rgd; |
| 1790 | if (rgd != begin) /* If we didn't wrap */ |
| 1791 | return true; |
| 1792 | return false; |
| 1793 | } |
| 1794 | |
Steven Whitehouse | c8cdf47 | 2007-06-08 10:05:33 +0100 | [diff] [blame] | 1795 | /** |
Bob Peterson | 666d1d8 | 2012-06-13 23:03:56 -0400 | [diff] [blame] | 1796 | * gfs2_inplace_reserve - Reserve space in the filesystem |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1797 | * @ip: the inode to reserve space for |
Bob Peterson | 666d1d8 | 2012-06-13 23:03:56 -0400 | [diff] [blame] | 1798 | * @requested: the number of blocks to be reserved |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1799 | * |
| 1800 | * Returns: errno |
| 1801 | */ |
| 1802 | |
Steven Whitehouse | 9dbe961 | 2012-10-31 10:37:10 +0000 | [diff] [blame] | 1803 | int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested, u32 aflags) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1804 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1805 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1806 | struct gfs2_rgrpd *begin = NULL; |
Bob Peterson | 564e12b | 2011-11-21 13:36:17 -0500 | [diff] [blame] | 1807 | struct gfs2_blkreserv *rs = ip->i_res; |
Steven Whitehouse | bcd97c0 | 2012-10-31 09:58:42 +0000 | [diff] [blame] | 1808 | int error = 0, rg_locked, flags = 0; |
Bob Peterson | 666d1d8 | 2012-06-13 23:03:56 -0400 | [diff] [blame] | 1809 | u64 last_unlinked = NO_BLOCK; |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 1810 | int loops = 0; |
Steven Whitehouse | 9dbe961 | 2012-10-31 10:37:10 +0000 | [diff] [blame] | 1811 | u32 skip = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1812 | |
Benjamin Marzinski | 90306c4 | 2012-05-29 23:01:09 -0500 | [diff] [blame] | 1813 | if (sdp->sd_args.ar_rgrplvb) |
| 1814 | flags |= GL_SKIP; |
Steven Whitehouse | c743ffd | 2012-08-25 18:21:47 +0100 | [diff] [blame] | 1815 | if (gfs2_assert_warn(sdp, requested)) |
| 1816 | return -EINVAL; |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1817 | if (gfs2_rs_active(rs)) { |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 1818 | begin = rs->rs_rbm.rgd; |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1819 | flags = 0; /* Yoda: Do or do not. There is no try */ |
| 1820 | } else if (ip->i_rgd && rgrp_contains_block(ip->i_rgd, ip->i_goal)) { |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 1821 | rs->rs_rbm.rgd = begin = ip->i_rgd; |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1822 | } else { |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 1823 | rs->rs_rbm.rgd = begin = gfs2_blk2rgrpd(sdp, ip->i_goal, 1); |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1824 | } |
Steven Whitehouse | 9dbe961 | 2012-10-31 10:37:10 +0000 | [diff] [blame] | 1825 | if (S_ISDIR(ip->i_inode.i_mode) && (aflags & GFS2_AF_ORLOV)) |
| 1826 | skip = gfs2_orlov_skip(ip); |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 1827 | if (rs->rs_rbm.rgd == NULL) |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 1828 | return -EBADSLT; |
| 1829 | |
| 1830 | while (loops < 3) { |
Steven Whitehouse | c743ffd | 2012-08-25 18:21:47 +0100 | [diff] [blame] | 1831 | rg_locked = 1; |
Abhijith Das | 292c8c1 | 2007-11-29 14:13:54 -0600 | [diff] [blame] | 1832 | |
Steven Whitehouse | c743ffd | 2012-08-25 18:21:47 +0100 | [diff] [blame] | 1833 | if (!gfs2_glock_is_locked_by_me(rs->rs_rbm.rgd->rd_gl)) { |
| 1834 | rg_locked = 0; |
Steven Whitehouse | 9dbe961 | 2012-10-31 10:37:10 +0000 | [diff] [blame] | 1835 | if (skip && skip--) |
| 1836 | goto next_rgrp; |
Steven Whitehouse | bcd97c0 | 2012-10-31 09:58:42 +0000 | [diff] [blame] | 1837 | if (!gfs2_rs_active(rs) && (loops < 2) && |
| 1838 | gfs2_rgrp_used_recently(rs, 1000) && |
| 1839 | gfs2_rgrp_congested(rs->rs_rbm.rgd, loops)) |
| 1840 | goto next_rgrp; |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 1841 | error = gfs2_glock_nq_init(rs->rs_rbm.rgd->rd_gl, |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 1842 | LM_ST_EXCLUSIVE, flags, |
| 1843 | &rs->rs_rgd_gh); |
Steven Whitehouse | c743ffd | 2012-08-25 18:21:47 +0100 | [diff] [blame] | 1844 | if (unlikely(error)) |
| 1845 | return error; |
Steven Whitehouse | bcd97c0 | 2012-10-31 09:58:42 +0000 | [diff] [blame] | 1846 | if (!gfs2_rs_active(rs) && (loops < 2) && |
| 1847 | gfs2_rgrp_congested(rs->rs_rbm.rgd, loops)) |
| 1848 | goto skip_rgrp; |
Steven Whitehouse | c743ffd | 2012-08-25 18:21:47 +0100 | [diff] [blame] | 1849 | if (sdp->sd_args.ar_rgrplvb) { |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 1850 | error = update_rgrp_lvb(rs->rs_rbm.rgd); |
Steven Whitehouse | c743ffd | 2012-08-25 18:21:47 +0100 | [diff] [blame] | 1851 | if (unlikely(error)) { |
Benjamin Marzinski | 90306c4 | 2012-05-29 23:01:09 -0500 | [diff] [blame] | 1852 | gfs2_glock_dq_uninit(&rs->rs_rgd_gh); |
| 1853 | return error; |
| 1854 | } |
| 1855 | } |
Abhijith Das | 292c8c1 | 2007-11-29 14:13:54 -0600 | [diff] [blame] | 1856 | } |
Bob Peterson | 666d1d8 | 2012-06-13 23:03:56 -0400 | [diff] [blame] | 1857 | |
Steven Whitehouse | c743ffd | 2012-08-25 18:21:47 +0100 | [diff] [blame] | 1858 | /* Skip unuseable resource groups */ |
| 1859 | if (rs->rs_rbm.rgd->rd_flags & (GFS2_RGF_NOALLOC | GFS2_RDF_ERROR)) |
| 1860 | goto skip_rgrp; |
| 1861 | |
| 1862 | if (sdp->sd_args.ar_rgrplvb) |
| 1863 | gfs2_rgrp_bh_get(rs->rs_rbm.rgd); |
| 1864 | |
| 1865 | /* Get a reservation if we don't already have one */ |
| 1866 | if (!gfs2_rs_active(rs)) |
| 1867 | rg_mblk_search(rs->rs_rbm.rgd, ip, requested); |
| 1868 | |
| 1869 | /* Skip rgrps when we can't get a reservation on first pass */ |
| 1870 | if (!gfs2_rs_active(rs) && (loops < 1)) |
| 1871 | goto check_rgrp; |
| 1872 | |
| 1873 | /* If rgrp has enough free space, use it */ |
| 1874 | if (rs->rs_rbm.rgd->rd_free_clone >= requested) { |
| 1875 | ip->i_rgd = rs->rs_rbm.rgd; |
| 1876 | return 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1877 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1878 | |
Steven Whitehouse | c743ffd | 2012-08-25 18:21:47 +0100 | [diff] [blame] | 1879 | /* Drop reservation, if we couldn't use reserved rgrp */ |
| 1880 | if (gfs2_rs_active(rs)) |
| 1881 | gfs2_rs_deltree(ip, rs); |
| 1882 | check_rgrp: |
| 1883 | /* Check for unlinked inodes which can be reclaimed */ |
| 1884 | if (rs->rs_rbm.rgd->rd_flags & GFS2_RDF_CHECK) |
| 1885 | try_rgrp_unlink(rs->rs_rbm.rgd, &last_unlinked, |
| 1886 | ip->i_no_addr); |
| 1887 | skip_rgrp: |
| 1888 | /* Unlock rgrp if required */ |
| 1889 | if (!rg_locked) |
| 1890 | gfs2_glock_dq_uninit(&rs->rs_rgd_gh); |
| 1891 | next_rgrp: |
| 1892 | /* Find the next rgrp, and continue looking */ |
| 1893 | if (gfs2_select_rgrp(&rs->rs_rbm.rgd, begin)) |
| 1894 | continue; |
Steven Whitehouse | 9dbe961 | 2012-10-31 10:37:10 +0000 | [diff] [blame] | 1895 | if (skip) |
| 1896 | continue; |
Steven Whitehouse | c743ffd | 2012-08-25 18:21:47 +0100 | [diff] [blame] | 1897 | |
| 1898 | /* If we've scanned all the rgrps, but found no free blocks |
| 1899 | * then this checks for some less likely conditions before |
| 1900 | * trying again. |
| 1901 | */ |
Steven Whitehouse | c743ffd | 2012-08-25 18:21:47 +0100 | [diff] [blame] | 1902 | loops++; |
| 1903 | /* Check that fs hasn't grown if writing to rindex */ |
| 1904 | if (ip == GFS2_I(sdp->sd_rindex) && !sdp->sd_rindex_uptodate) { |
| 1905 | error = gfs2_ri_update(ip); |
| 1906 | if (error) |
| 1907 | return error; |
| 1908 | } |
| 1909 | /* Flushing the log may release space */ |
| 1910 | if (loops == 2) |
| 1911 | gfs2_log_flush(sdp, NULL); |
| 1912 | } |
| 1913 | |
| 1914 | return -ENOSPC; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1915 | } |
| 1916 | |
| 1917 | /** |
| 1918 | * gfs2_inplace_release - release an inplace reservation |
| 1919 | * @ip: the inode the reservation was taken out on |
| 1920 | * |
| 1921 | * Release a reservation made by gfs2_inplace_reserve(). |
| 1922 | */ |
| 1923 | |
| 1924 | void gfs2_inplace_release(struct gfs2_inode *ip) |
| 1925 | { |
Bob Peterson | 564e12b | 2011-11-21 13:36:17 -0500 | [diff] [blame] | 1926 | struct gfs2_blkreserv *rs = ip->i_res; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1927 | |
Bob Peterson | 564e12b | 2011-11-21 13:36:17 -0500 | [diff] [blame] | 1928 | if (rs->rs_rgd_gh.gh_gl) |
| 1929 | gfs2_glock_dq_uninit(&rs->rs_rgd_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1930 | } |
| 1931 | |
| 1932 | /** |
| 1933 | * gfs2_get_block_type - Check a block in a RG is of given type |
| 1934 | * @rgd: the resource group holding the block |
| 1935 | * @block: the block number |
| 1936 | * |
| 1937 | * Returns: The block type (GFS2_BLKST_*) |
| 1938 | */ |
| 1939 | |
Steven Whitehouse | acf7e24 | 2009-09-08 18:00:30 +0100 | [diff] [blame] | 1940 | static unsigned char gfs2_get_block_type(struct gfs2_rgrpd *rgd, u64 block) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1941 | { |
Steven Whitehouse | 3983903 | 2012-08-03 11:10:30 +0100 | [diff] [blame] | 1942 | struct gfs2_rbm rbm = { .rgd = rgd, }; |
| 1943 | int ret; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1944 | |
Steven Whitehouse | 3983903 | 2012-08-03 11:10:30 +0100 | [diff] [blame] | 1945 | ret = gfs2_rbm_from_block(&rbm, block); |
| 1946 | WARN_ON_ONCE(ret != 0); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1947 | |
Steven Whitehouse | c04a2ef | 2012-08-13 11:14:57 +0100 | [diff] [blame] | 1948 | return gfs2_testbit(&rbm); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1949 | } |
| 1950 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1951 | |
Bob Peterson | b3e47ca | 2011-11-21 11:47:08 -0500 | [diff] [blame] | 1952 | /** |
| 1953 | * gfs2_alloc_extent - allocate an extent from a given bitmap |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 1954 | * @rbm: the resource group information |
Bob Peterson | b3e47ca | 2011-11-21 11:47:08 -0500 | [diff] [blame] | 1955 | * @dinode: TRUE if the first block we allocate is for a dinode |
Steven Whitehouse | c04a2ef | 2012-08-13 11:14:57 +0100 | [diff] [blame] | 1956 | * @n: The extent length (value/result) |
Bob Peterson | b3e47ca | 2011-11-21 11:47:08 -0500 | [diff] [blame] | 1957 | * |
Steven Whitehouse | c04a2ef | 2012-08-13 11:14:57 +0100 | [diff] [blame] | 1958 | * Add the bitmap buffer to the transaction. |
Bob Peterson | b3e47ca | 2011-11-21 11:47:08 -0500 | [diff] [blame] | 1959 | * Set the found bits to @new_state to change block's allocation state. |
Bob Peterson | b3e47ca | 2011-11-21 11:47:08 -0500 | [diff] [blame] | 1960 | */ |
Steven Whitehouse | c04a2ef | 2012-08-13 11:14:57 +0100 | [diff] [blame] | 1961 | static void gfs2_alloc_extent(const struct gfs2_rbm *rbm, bool dinode, |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 1962 | unsigned int *n) |
Bob Peterson | b3e47ca | 2011-11-21 11:47:08 -0500 | [diff] [blame] | 1963 | { |
Steven Whitehouse | c04a2ef | 2012-08-13 11:14:57 +0100 | [diff] [blame] | 1964 | struct gfs2_rbm pos = { .rgd = rbm->rgd, }; |
Bob Peterson | b3e47ca | 2011-11-21 11:47:08 -0500 | [diff] [blame] | 1965 | const unsigned int elen = *n; |
Steven Whitehouse | c04a2ef | 2012-08-13 11:14:57 +0100 | [diff] [blame] | 1966 | u64 block; |
| 1967 | int ret; |
Bob Peterson | b3e47ca | 2011-11-21 11:47:08 -0500 | [diff] [blame] | 1968 | |
Steven Whitehouse | c04a2ef | 2012-08-13 11:14:57 +0100 | [diff] [blame] | 1969 | *n = 1; |
| 1970 | block = gfs2_rbm_to_block(rbm); |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 1971 | gfs2_trans_add_meta(rbm->rgd->rd_gl, rbm->bi->bi_bh); |
Steven Whitehouse | 3e6339d | 2012-08-13 11:37:51 +0100 | [diff] [blame] | 1972 | gfs2_setbit(rbm, true, dinode ? GFS2_BLKST_DINODE : GFS2_BLKST_USED); |
Steven Whitehouse | c04a2ef | 2012-08-13 11:14:57 +0100 | [diff] [blame] | 1973 | block++; |
Steven Whitehouse | 60a0b8f | 2009-05-21 12:23:12 +0100 | [diff] [blame] | 1974 | while (*n < elen) { |
Steven Whitehouse | c04a2ef | 2012-08-13 11:14:57 +0100 | [diff] [blame] | 1975 | ret = gfs2_rbm_from_block(&pos, block); |
Bob Peterson | 0688a5e | 2012-08-28 08:45:56 -0400 | [diff] [blame] | 1976 | if (ret || gfs2_testbit(&pos) != GFS2_BLKST_FREE) |
Steven Whitehouse | 60a0b8f | 2009-05-21 12:23:12 +0100 | [diff] [blame] | 1977 | break; |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 1978 | gfs2_trans_add_meta(pos.rgd->rd_gl, pos.bi->bi_bh); |
Steven Whitehouse | 3e6339d | 2012-08-13 11:37:51 +0100 | [diff] [blame] | 1979 | gfs2_setbit(&pos, true, GFS2_BLKST_USED); |
Steven Whitehouse | 60a0b8f | 2009-05-21 12:23:12 +0100 | [diff] [blame] | 1980 | (*n)++; |
Steven Whitehouse | c04a2ef | 2012-08-13 11:14:57 +0100 | [diff] [blame] | 1981 | block++; |
Steven Whitehouse | 60a0b8f | 2009-05-21 12:23:12 +0100 | [diff] [blame] | 1982 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1983 | } |
| 1984 | |
| 1985 | /** |
| 1986 | * rgblk_free - Change alloc state of given block(s) |
| 1987 | * @sdp: the filesystem |
| 1988 | * @bstart: the start of a run of blocks to free |
| 1989 | * @blen: the length of the block run (all must lie within ONE RG!) |
| 1990 | * @new_state: GFS2_BLKST_XXX the after-allocation block state |
| 1991 | * |
| 1992 | * Returns: Resource group containing the block(s) |
| 1993 | */ |
| 1994 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 1995 | static struct gfs2_rgrpd *rgblk_free(struct gfs2_sbd *sdp, u64 bstart, |
| 1996 | u32 blen, unsigned char new_state) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1997 | { |
Steven Whitehouse | 3b1d0b9 | 2012-08-03 11:23:28 +0100 | [diff] [blame] | 1998 | struct gfs2_rbm rbm; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1999 | |
Steven Whitehouse | 3b1d0b9 | 2012-08-03 11:23:28 +0100 | [diff] [blame] | 2000 | rbm.rgd = gfs2_blk2rgrpd(sdp, bstart, 1); |
| 2001 | if (!rbm.rgd) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2002 | if (gfs2_consist(sdp)) |
Steven Whitehouse | 382066d | 2006-05-24 10:22:09 -0400 | [diff] [blame] | 2003 | fs_err(sdp, "block = %llu\n", (unsigned long long)bstart); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2004 | return NULL; |
| 2005 | } |
| 2006 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2007 | while (blen--) { |
Steven Whitehouse | 3b1d0b9 | 2012-08-03 11:23:28 +0100 | [diff] [blame] | 2008 | gfs2_rbm_from_block(&rbm, bstart); |
| 2009 | bstart++; |
| 2010 | if (!rbm.bi->bi_clone) { |
| 2011 | rbm.bi->bi_clone = kmalloc(rbm.bi->bi_bh->b_size, |
| 2012 | GFP_NOFS | __GFP_NOFAIL); |
| 2013 | memcpy(rbm.bi->bi_clone + rbm.bi->bi_offset, |
| 2014 | rbm.bi->bi_bh->b_data + rbm.bi->bi_offset, |
| 2015 | rbm.bi->bi_len); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2016 | } |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 2017 | gfs2_trans_add_meta(rbm.rgd->rd_gl, rbm.bi->bi_bh); |
Steven Whitehouse | 3e6339d | 2012-08-13 11:37:51 +0100 | [diff] [blame] | 2018 | gfs2_setbit(&rbm, false, new_state); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2019 | } |
| 2020 | |
Steven Whitehouse | 3b1d0b9 | 2012-08-03 11:23:28 +0100 | [diff] [blame] | 2021 | return rbm.rgd; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2022 | } |
| 2023 | |
| 2024 | /** |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 2025 | * gfs2_rgrp_dump - print out an rgrp |
| 2026 | * @seq: The iterator |
| 2027 | * @gl: The glock in question |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2028 | * |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2029 | */ |
| 2030 | |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 2031 | int gfs2_rgrp_dump(struct seq_file *seq, const struct gfs2_glock *gl) |
| 2032 | { |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 2033 | struct gfs2_rgrpd *rgd = gl->gl_object; |
| 2034 | struct gfs2_blkreserv *trs; |
| 2035 | const struct rb_node *n; |
| 2036 | |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 2037 | if (rgd == NULL) |
| 2038 | return 0; |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 2039 | gfs2_print_dbg(seq, " R: n:%llu f:%02x b:%u/%u i:%u r:%u\n", |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 2040 | (unsigned long long)rgd->rd_addr, rgd->rd_flags, |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 2041 | rgd->rd_free, rgd->rd_free_clone, rgd->rd_dinodes, |
| 2042 | rgd->rd_reserved); |
| 2043 | spin_lock(&rgd->rd_rsspin); |
| 2044 | for (n = rb_first(&rgd->rd_rstree); n; n = rb_next(&trs->rs_node)) { |
| 2045 | trs = rb_entry(n, struct gfs2_blkreserv, rs_node); |
| 2046 | dump_rs(seq, trs); |
| 2047 | } |
| 2048 | spin_unlock(&rgd->rd_rsspin); |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 2049 | return 0; |
| 2050 | } |
| 2051 | |
Steven Whitehouse | 6050b9c | 2009-07-31 16:19:40 +0100 | [diff] [blame] | 2052 | static void gfs2_rgrp_error(struct gfs2_rgrpd *rgd) |
| 2053 | { |
| 2054 | struct gfs2_sbd *sdp = rgd->rd_sbd; |
| 2055 | fs_warn(sdp, "rgrp %llu has an error, marking it readonly until umount\n", |
Steven Whitehouse | 86d0063 | 2009-09-14 09:50:57 +0100 | [diff] [blame] | 2056 | (unsigned long long)rgd->rd_addr); |
Steven Whitehouse | 6050b9c | 2009-07-31 16:19:40 +0100 | [diff] [blame] | 2057 | fs_warn(sdp, "umount on all nodes and run fsck.gfs2 to fix the error\n"); |
| 2058 | gfs2_rgrp_dump(NULL, rgd->rd_gl); |
| 2059 | rgd->rd_flags |= GFS2_RDF_ERROR; |
| 2060 | } |
| 2061 | |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 2062 | /** |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 2063 | * gfs2_adjust_reservation - Adjust (or remove) a reservation after allocation |
| 2064 | * @ip: The inode we have just allocated blocks for |
| 2065 | * @rbm: The start of the allocated blocks |
| 2066 | * @len: The extent length |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 2067 | * |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 2068 | * Adjusts a reservation after an allocation has taken place. If the |
| 2069 | * reservation does not match the allocation, or if it is now empty |
| 2070 | * then it is removed. |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 2071 | */ |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 2072 | |
| 2073 | static void gfs2_adjust_reservation(struct gfs2_inode *ip, |
| 2074 | const struct gfs2_rbm *rbm, unsigned len) |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 2075 | { |
| 2076 | struct gfs2_blkreserv *rs = ip->i_res; |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 2077 | struct gfs2_rgrpd *rgd = rbm->rgd; |
| 2078 | unsigned rlen; |
| 2079 | u64 block; |
| 2080 | int ret; |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 2081 | |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 2082 | spin_lock(&rgd->rd_rsspin); |
| 2083 | if (gfs2_rs_active(rs)) { |
| 2084 | if (gfs2_rbm_eq(&rs->rs_rbm, rbm)) { |
| 2085 | block = gfs2_rbm_to_block(rbm); |
| 2086 | ret = gfs2_rbm_from_block(&rs->rs_rbm, block + len); |
| 2087 | rlen = min(rs->rs_free, len); |
| 2088 | rs->rs_free -= rlen; |
| 2089 | rgd->rd_reserved -= rlen; |
Steven Whitehouse | 9e733d3 | 2012-08-23 15:37:59 +0100 | [diff] [blame] | 2090 | trace_gfs2_rs(rs, TRACE_RS_CLAIM); |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 2091 | if (rs->rs_free && !ret) |
| 2092 | goto out; |
| 2093 | } |
| 2094 | __rs_deltree(ip, rs); |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 2095 | } |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 2096 | out: |
| 2097 | spin_unlock(&rgd->rd_rsspin); |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 2098 | } |
| 2099 | |
| 2100 | /** |
Bob Peterson | 6e87ed0 | 2011-11-18 10:58:32 -0500 | [diff] [blame] | 2101 | * gfs2_alloc_blocks - Allocate one or more blocks of data and/or a dinode |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 2102 | * @ip: the inode to allocate the block for |
| 2103 | * @bn: Used to return the starting block number |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 2104 | * @nblocks: requested number of blocks/extent length (value/result) |
Bob Peterson | 6e87ed0 | 2011-11-18 10:58:32 -0500 | [diff] [blame] | 2105 | * @dinode: 1 if we're allocating a dinode block, else 0 |
Bob Peterson | 3c5d785 | 2011-11-14 11:17:08 -0500 | [diff] [blame] | 2106 | * @generation: the generation number of the inode |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 2107 | * |
| 2108 | * Returns: 0 or error |
| 2109 | */ |
| 2110 | |
Steven Whitehouse | 6a8099e | 2011-11-22 12:18:51 +0000 | [diff] [blame] | 2111 | int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *nblocks, |
Bob Peterson | 6e87ed0 | 2011-11-18 10:58:32 -0500 | [diff] [blame] | 2112 | bool dinode, u64 *generation) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2113 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 2114 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
Steven Whitehouse | d9ba761 | 2009-04-23 08:59:41 +0100 | [diff] [blame] | 2115 | struct buffer_head *dibh; |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 2116 | struct gfs2_rbm rbm = { .rgd = ip->i_rgd, }; |
Steven Whitehouse | 6a8099e | 2011-11-22 12:18:51 +0000 | [diff] [blame] | 2117 | unsigned int ndata; |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 2118 | u64 goal; |
Bob Peterson | 3c5d785 | 2011-11-14 11:17:08 -0500 | [diff] [blame] | 2119 | u64 block; /* block, within the file system scope */ |
Steven Whitehouse | d9ba761 | 2009-04-23 08:59:41 +0100 | [diff] [blame] | 2120 | int error; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2121 | |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 2122 | if (gfs2_rs_active(ip->i_res)) |
| 2123 | goal = gfs2_rbm_to_block(&ip->i_res->rs_rbm); |
| 2124 | else if (!dinode && rgrp_contains_block(rbm.rgd, ip->i_goal)) |
| 2125 | goal = ip->i_goal; |
Steven Whitehouse | 62e252e | 2012-07-30 11:06:08 +0100 | [diff] [blame] | 2126 | else |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 2127 | goal = rbm.rgd->rd_last_alloc + rbm.rgd->rd_data0; |
Steven Whitehouse | 62e252e | 2012-07-30 11:06:08 +0100 | [diff] [blame] | 2128 | |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 2129 | gfs2_rbm_from_block(&rbm, goal); |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 2130 | error = gfs2_rbm_find(&rbm, GFS2_BLKST_FREE, 0, ip, false); |
Steven Whitehouse | 62e252e | 2012-07-30 11:06:08 +0100 | [diff] [blame] | 2131 | |
Steven Whitehouse | 137834a | 2012-08-23 13:43:40 +0100 | [diff] [blame] | 2132 | if (error == -ENOSPC) { |
| 2133 | gfs2_rbm_from_block(&rbm, goal); |
Steven Whitehouse | ff7f4cb | 2012-09-10 10:03:50 +0100 | [diff] [blame] | 2134 | error = gfs2_rbm_find(&rbm, GFS2_BLKST_FREE, 0, NULL, false); |
Steven Whitehouse | 137834a | 2012-08-23 13:43:40 +0100 | [diff] [blame] | 2135 | } |
| 2136 | |
Steven Whitehouse | 62e252e | 2012-07-30 11:06:08 +0100 | [diff] [blame] | 2137 | /* Since all blocks are reserved in advance, this shouldn't happen */ |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 2138 | if (error) { |
Steven Whitehouse | 9e733d3 | 2012-08-23 15:37:59 +0100 | [diff] [blame] | 2139 | fs_warn(sdp, "inum=%llu error=%d, nblocks=%u, full=%d\n", |
| 2140 | (unsigned long long)ip->i_no_addr, error, *nblocks, |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 2141 | test_bit(GBF_FULL, &rbm.rgd->rd_bits->bi_flags)); |
Steven Whitehouse | 62e252e | 2012-07-30 11:06:08 +0100 | [diff] [blame] | 2142 | goto rgrp_error; |
| 2143 | } |
| 2144 | |
Steven Whitehouse | c04a2ef | 2012-08-13 11:14:57 +0100 | [diff] [blame] | 2145 | gfs2_alloc_extent(&rbm, dinode, nblocks); |
| 2146 | block = gfs2_rbm_to_block(&rbm); |
Steven Whitehouse | c743ffd | 2012-08-25 18:21:47 +0100 | [diff] [blame] | 2147 | rbm.rgd->rd_last_alloc = block - rbm.rgd->rd_data0; |
Steven Whitehouse | 5b924ae | 2012-08-01 20:35:05 +0100 | [diff] [blame] | 2148 | if (gfs2_rs_active(ip->i_res)) |
| 2149 | gfs2_adjust_reservation(ip, &rbm, *nblocks); |
Steven Whitehouse | 6a8099e | 2011-11-22 12:18:51 +0000 | [diff] [blame] | 2150 | ndata = *nblocks; |
| 2151 | if (dinode) |
| 2152 | ndata--; |
Bob Peterson | b3e47ca | 2011-11-21 11:47:08 -0500 | [diff] [blame] | 2153 | |
Bob Peterson | 3c5d785 | 2011-11-14 11:17:08 -0500 | [diff] [blame] | 2154 | if (!dinode) { |
Steven Whitehouse | 6a8099e | 2011-11-22 12:18:51 +0000 | [diff] [blame] | 2155 | ip->i_goal = block + ndata - 1; |
Bob Peterson | 3c5d785 | 2011-11-14 11:17:08 -0500 | [diff] [blame] | 2156 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 2157 | if (error == 0) { |
| 2158 | struct gfs2_dinode *di = |
| 2159 | (struct gfs2_dinode *)dibh->b_data; |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 2160 | gfs2_trans_add_meta(ip->i_gl, dibh); |
Bob Peterson | 3c5d785 | 2011-11-14 11:17:08 -0500 | [diff] [blame] | 2161 | di->di_goal_meta = di->di_goal_data = |
| 2162 | cpu_to_be64(ip->i_goal); |
| 2163 | brelse(dibh); |
| 2164 | } |
Steven Whitehouse | d9ba761 | 2009-04-23 08:59:41 +0100 | [diff] [blame] | 2165 | } |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 2166 | if (rbm.rgd->rd_free < *nblocks) { |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 2167 | printk(KERN_WARNING "nblocks=%u\n", *nblocks); |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 2168 | goto rgrp_error; |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 2169 | } |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 2170 | |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 2171 | rbm.rgd->rd_free -= *nblocks; |
Bob Peterson | 3c5d785 | 2011-11-14 11:17:08 -0500 | [diff] [blame] | 2172 | if (dinode) { |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 2173 | rbm.rgd->rd_dinodes++; |
| 2174 | *generation = rbm.rgd->rd_igeneration++; |
Bob Peterson | 3c5d785 | 2011-11-14 11:17:08 -0500 | [diff] [blame] | 2175 | if (*generation == 0) |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 2176 | *generation = rbm.rgd->rd_igeneration++; |
Bob Peterson | 3c5d785 | 2011-11-14 11:17:08 -0500 | [diff] [blame] | 2177 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2178 | |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 2179 | gfs2_trans_add_meta(rbm.rgd->rd_gl, rbm.rgd->rd_bits[0].bi_bh); |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 2180 | gfs2_rgrp_out(rbm.rgd, rbm.rgd->rd_bits[0].bi_bh->b_data); |
| 2181 | gfs2_rgrp_ondisk2lvb(rbm.rgd->rd_rgl, rbm.rgd->rd_bits[0].bi_bh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2182 | |
Steven Whitehouse | 6a8099e | 2011-11-22 12:18:51 +0000 | [diff] [blame] | 2183 | gfs2_statfs_change(sdp, 0, -(s64)*nblocks, dinode ? 1 : 0); |
Bob Peterson | 3c5d785 | 2011-11-14 11:17:08 -0500 | [diff] [blame] | 2184 | if (dinode) |
| 2185 | gfs2_trans_add_unrevoke(sdp, block, 1); |
Steven Whitehouse | 6a8099e | 2011-11-22 12:18:51 +0000 | [diff] [blame] | 2186 | |
| 2187 | /* |
| 2188 | * This needs reviewing to see why we cannot do the quota change |
| 2189 | * at this point in the dinode case. |
| 2190 | */ |
| 2191 | if (ndata) |
| 2192 | gfs2_quota_change(ip, ndata, ip->i_inode.i_uid, |
Bob Peterson | 3c5d785 | 2011-11-14 11:17:08 -0500 | [diff] [blame] | 2193 | ip->i_inode.i_gid); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2194 | |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 2195 | rbm.rgd->rd_free_clone -= *nblocks; |
| 2196 | trace_gfs2_block_alloc(ip, rbm.rgd, block, *nblocks, |
Bob Peterson | 6e87ed0 | 2011-11-18 10:58:32 -0500 | [diff] [blame] | 2197 | dinode ? GFS2_BLKST_DINODE : GFS2_BLKST_USED); |
Steven Whitehouse | 6050b9c | 2009-07-31 16:19:40 +0100 | [diff] [blame] | 2198 | *bn = block; |
| 2199 | return 0; |
| 2200 | |
| 2201 | rgrp_error: |
Steven Whitehouse | 4a993fb | 2012-07-31 15:21:20 +0100 | [diff] [blame] | 2202 | gfs2_rgrp_error(rbm.rgd); |
Steven Whitehouse | 6050b9c | 2009-07-31 16:19:40 +0100 | [diff] [blame] | 2203 | return -EIO; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2204 | } |
| 2205 | |
| 2206 | /** |
Eric Sandeen | 46fcb2e | 2011-06-23 10:39:34 -0500 | [diff] [blame] | 2207 | * __gfs2_free_blocks - free a contiguous run of block(s) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2208 | * @ip: the inode these blocks are being freed from |
| 2209 | * @bstart: first block of a run of contiguous blocks |
| 2210 | * @blen: the length of the block run |
Eric Sandeen | 46fcb2e | 2011-06-23 10:39:34 -0500 | [diff] [blame] | 2211 | * @meta: 1 if the blocks represent metadata |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2212 | * |
| 2213 | */ |
| 2214 | |
Eric Sandeen | 46fcb2e | 2011-06-23 10:39:34 -0500 | [diff] [blame] | 2215 | void __gfs2_free_blocks(struct gfs2_inode *ip, u64 bstart, u32 blen, int meta) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2216 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 2217 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2218 | struct gfs2_rgrpd *rgd; |
| 2219 | |
| 2220 | rgd = rgblk_free(sdp, bstart, blen, GFS2_BLKST_FREE); |
| 2221 | if (!rgd) |
| 2222 | return; |
Bob Peterson | 41db1ab | 2012-05-09 12:11:35 -0400 | [diff] [blame] | 2223 | trace_gfs2_block_alloc(ip, rgd, bstart, blen, GFS2_BLKST_FREE); |
Steven Whitehouse | cfc8b54 | 2008-11-04 10:25:13 +0000 | [diff] [blame] | 2224 | rgd->rd_free += blen; |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 2225 | rgd->rd_flags &= ~GFS2_RGF_TRIMMED; |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 2226 | gfs2_trans_add_meta(rgd->rd_gl, rgd->rd_bits[0].bi_bh); |
Bob Peterson | 42d52e3 | 2008-01-28 18:38:07 -0600 | [diff] [blame] | 2227 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
Benjamin Marzinski | 90306c4 | 2012-05-29 23:01:09 -0500 | [diff] [blame] | 2228 | gfs2_rgrp_ondisk2lvb(rgd->rd_rgl, rgd->rd_bits[0].bi_bh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2229 | |
Steven Whitehouse | 6d3117b | 2011-05-21 14:05:58 +0100 | [diff] [blame] | 2230 | /* Directories keep their data in the metadata address space */ |
Eric Sandeen | 46fcb2e | 2011-06-23 10:39:34 -0500 | [diff] [blame] | 2231 | if (meta || ip->i_depth) |
Steven Whitehouse | 6d3117b | 2011-05-21 14:05:58 +0100 | [diff] [blame] | 2232 | gfs2_meta_wipe(ip, bstart, blen); |
Bob Peterson | 4c16c36 | 2011-02-23 16:11:33 -0500 | [diff] [blame] | 2233 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2234 | |
Bob Peterson | 4c16c36 | 2011-02-23 16:11:33 -0500 | [diff] [blame] | 2235 | /** |
Bob Peterson | 4c16c36 | 2011-02-23 16:11:33 -0500 | [diff] [blame] | 2236 | * gfs2_free_meta - free a contiguous run of data block(s) |
| 2237 | * @ip: the inode these blocks are being freed from |
| 2238 | * @bstart: first block of a run of contiguous blocks |
| 2239 | * @blen: the length of the block run |
| 2240 | * |
| 2241 | */ |
| 2242 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 2243 | void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2244 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 2245 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2246 | |
Eric Sandeen | 46fcb2e | 2011-06-23 10:39:34 -0500 | [diff] [blame] | 2247 | __gfs2_free_blocks(ip, bstart, blen, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2248 | gfs2_statfs_change(sdp, 0, +blen, 0); |
Steven Whitehouse | 2933f92 | 2006-11-01 13:23:29 -0500 | [diff] [blame] | 2249 | gfs2_quota_change(ip, -(s64)blen, ip->i_inode.i_uid, ip->i_inode.i_gid); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2250 | } |
| 2251 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 2252 | void gfs2_unlink_di(struct inode *inode) |
| 2253 | { |
| 2254 | struct gfs2_inode *ip = GFS2_I(inode); |
| 2255 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
| 2256 | struct gfs2_rgrpd *rgd; |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 2257 | u64 blkno = ip->i_no_addr; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 2258 | |
| 2259 | rgd = rgblk_free(sdp, blkno, 1, GFS2_BLKST_UNLINKED); |
| 2260 | if (!rgd) |
| 2261 | return; |
Bob Peterson | 41db1ab | 2012-05-09 12:11:35 -0400 | [diff] [blame] | 2262 | trace_gfs2_block_alloc(ip, rgd, blkno, 1, GFS2_BLKST_UNLINKED); |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 2263 | gfs2_trans_add_meta(rgd->rd_gl, rgd->rd_bits[0].bi_bh); |
Bob Peterson | 42d52e3 | 2008-01-28 18:38:07 -0600 | [diff] [blame] | 2264 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
Benjamin Marzinski | 90306c4 | 2012-05-29 23:01:09 -0500 | [diff] [blame] | 2265 | gfs2_rgrp_ondisk2lvb(rgd->rd_rgl, rgd->rd_bits[0].bi_bh->b_data); |
| 2266 | update_rgrp_lvb_unlinked(rgd, 1); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 2267 | } |
| 2268 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 2269 | static void gfs2_free_uninit_di(struct gfs2_rgrpd *rgd, u64 blkno) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2270 | { |
| 2271 | struct gfs2_sbd *sdp = rgd->rd_sbd; |
| 2272 | struct gfs2_rgrpd *tmp_rgd; |
| 2273 | |
| 2274 | tmp_rgd = rgblk_free(sdp, blkno, 1, GFS2_BLKST_FREE); |
| 2275 | if (!tmp_rgd) |
| 2276 | return; |
| 2277 | gfs2_assert_withdraw(sdp, rgd == tmp_rgd); |
| 2278 | |
Steven Whitehouse | 73f7494 | 2008-11-04 10:32:57 +0000 | [diff] [blame] | 2279 | if (!rgd->rd_dinodes) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2280 | gfs2_consist_rgrpd(rgd); |
Steven Whitehouse | 73f7494 | 2008-11-04 10:32:57 +0000 | [diff] [blame] | 2281 | rgd->rd_dinodes--; |
Steven Whitehouse | cfc8b54 | 2008-11-04 10:25:13 +0000 | [diff] [blame] | 2282 | rgd->rd_free++; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2283 | |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 2284 | gfs2_trans_add_meta(rgd->rd_gl, rgd->rd_bits[0].bi_bh); |
Bob Peterson | 42d52e3 | 2008-01-28 18:38:07 -0600 | [diff] [blame] | 2285 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
Benjamin Marzinski | 90306c4 | 2012-05-29 23:01:09 -0500 | [diff] [blame] | 2286 | gfs2_rgrp_ondisk2lvb(rgd->rd_rgl, rgd->rd_bits[0].bi_bh->b_data); |
| 2287 | update_rgrp_lvb_unlinked(rgd, -1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2288 | |
| 2289 | gfs2_statfs_change(sdp, 0, +1, -1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2290 | } |
| 2291 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2292 | |
| 2293 | void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip) |
| 2294 | { |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 2295 | gfs2_free_uninit_di(rgd, ip->i_no_addr); |
Bob Peterson | 41db1ab | 2012-05-09 12:11:35 -0400 | [diff] [blame] | 2296 | trace_gfs2_block_alloc(ip, rgd, ip->i_no_addr, 1, GFS2_BLKST_FREE); |
Steven Whitehouse | 2933f92 | 2006-11-01 13:23:29 -0500 | [diff] [blame] | 2297 | gfs2_quota_change(ip, -1, ip->i_inode.i_uid, ip->i_inode.i_gid); |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 2298 | gfs2_meta_wipe(ip, ip->i_no_addr, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2299 | } |
| 2300 | |
| 2301 | /** |
Steven Whitehouse | acf7e24 | 2009-09-08 18:00:30 +0100 | [diff] [blame] | 2302 | * gfs2_check_blk_type - Check the type of a block |
| 2303 | * @sdp: The superblock |
| 2304 | * @no_addr: The block number to check |
| 2305 | * @type: The block type we are looking for |
| 2306 | * |
| 2307 | * Returns: 0 if the block type matches the expected type |
| 2308 | * -ESTALE if it doesn't match |
| 2309 | * or -ve errno if something went wrong while checking |
| 2310 | */ |
| 2311 | |
| 2312 | int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr, unsigned int type) |
| 2313 | { |
| 2314 | struct gfs2_rgrpd *rgd; |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 2315 | struct gfs2_holder rgd_gh; |
Bob Peterson | 58884c4 | 2012-03-05 10:19:35 -0500 | [diff] [blame] | 2316 | int error = -EINVAL; |
Steven Whitehouse | acf7e24 | 2009-09-08 18:00:30 +0100 | [diff] [blame] | 2317 | |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 2318 | rgd = gfs2_blk2rgrpd(sdp, no_addr, 1); |
Steven Whitehouse | acf7e24 | 2009-09-08 18:00:30 +0100 | [diff] [blame] | 2319 | if (!rgd) |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 2320 | goto fail; |
Steven Whitehouse | acf7e24 | 2009-09-08 18:00:30 +0100 | [diff] [blame] | 2321 | |
| 2322 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_SHARED, 0, &rgd_gh); |
| 2323 | if (error) |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 2324 | goto fail; |
Steven Whitehouse | acf7e24 | 2009-09-08 18:00:30 +0100 | [diff] [blame] | 2325 | |
| 2326 | if (gfs2_get_block_type(rgd, no_addr) != type) |
| 2327 | error = -ESTALE; |
| 2328 | |
| 2329 | gfs2_glock_dq_uninit(&rgd_gh); |
Steven Whitehouse | acf7e24 | 2009-09-08 18:00:30 +0100 | [diff] [blame] | 2330 | fail: |
| 2331 | return error; |
| 2332 | } |
| 2333 | |
| 2334 | /** |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2335 | * gfs2_rlist_add - add a RG to a list of RGs |
Steven Whitehouse | 70b0c36 | 2011-09-02 16:08:09 +0100 | [diff] [blame] | 2336 | * @ip: the inode |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2337 | * @rlist: the list of resource groups |
| 2338 | * @block: the block |
| 2339 | * |
| 2340 | * Figure out what RG a block belongs to and add that RG to the list |
| 2341 | * |
| 2342 | * FIXME: Don't use NOFAIL |
| 2343 | * |
| 2344 | */ |
| 2345 | |
Steven Whitehouse | 70b0c36 | 2011-09-02 16:08:09 +0100 | [diff] [blame] | 2346 | void gfs2_rlist_add(struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist, |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 2347 | u64 block) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2348 | { |
Steven Whitehouse | 70b0c36 | 2011-09-02 16:08:09 +0100 | [diff] [blame] | 2349 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2350 | struct gfs2_rgrpd *rgd; |
| 2351 | struct gfs2_rgrpd **tmp; |
| 2352 | unsigned int new_space; |
| 2353 | unsigned int x; |
| 2354 | |
| 2355 | if (gfs2_assert_warn(sdp, !rlist->rl_ghs)) |
| 2356 | return; |
| 2357 | |
Steven Whitehouse | 70b0c36 | 2011-09-02 16:08:09 +0100 | [diff] [blame] | 2358 | if (ip->i_rgd && rgrp_contains_block(ip->i_rgd, block)) |
| 2359 | rgd = ip->i_rgd; |
| 2360 | else |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 2361 | rgd = gfs2_blk2rgrpd(sdp, block, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2362 | if (!rgd) { |
Steven Whitehouse | 70b0c36 | 2011-09-02 16:08:09 +0100 | [diff] [blame] | 2363 | fs_err(sdp, "rlist_add: no rgrp for block %llu\n", (unsigned long long)block); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2364 | return; |
| 2365 | } |
Steven Whitehouse | 70b0c36 | 2011-09-02 16:08:09 +0100 | [diff] [blame] | 2366 | ip->i_rgd = rgd; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2367 | |
| 2368 | for (x = 0; x < rlist->rl_rgrps; x++) |
| 2369 | if (rlist->rl_rgd[x] == rgd) |
| 2370 | return; |
| 2371 | |
| 2372 | if (rlist->rl_rgrps == rlist->rl_space) { |
| 2373 | new_space = rlist->rl_space + 10; |
| 2374 | |
| 2375 | tmp = kcalloc(new_space, sizeof(struct gfs2_rgrpd *), |
Steven Whitehouse | dd894be | 2006-07-27 14:29:00 -0400 | [diff] [blame] | 2376 | GFP_NOFS | __GFP_NOFAIL); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2377 | |
| 2378 | if (rlist->rl_rgd) { |
| 2379 | memcpy(tmp, rlist->rl_rgd, |
| 2380 | rlist->rl_space * sizeof(struct gfs2_rgrpd *)); |
| 2381 | kfree(rlist->rl_rgd); |
| 2382 | } |
| 2383 | |
| 2384 | rlist->rl_space = new_space; |
| 2385 | rlist->rl_rgd = tmp; |
| 2386 | } |
| 2387 | |
| 2388 | rlist->rl_rgd[rlist->rl_rgrps++] = rgd; |
| 2389 | } |
| 2390 | |
| 2391 | /** |
| 2392 | * gfs2_rlist_alloc - all RGs have been added to the rlist, now allocate |
| 2393 | * and initialize an array of glock holders for them |
| 2394 | * @rlist: the list of resource groups |
| 2395 | * @state: the lock state to acquire the RG lock in |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2396 | * |
| 2397 | * FIXME: Don't use NOFAIL |
| 2398 | * |
| 2399 | */ |
| 2400 | |
Bob Peterson | fe6c991 | 2008-01-28 11:13:02 -0600 | [diff] [blame] | 2401 | void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist, unsigned int state) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2402 | { |
| 2403 | unsigned int x; |
| 2404 | |
| 2405 | rlist->rl_ghs = kcalloc(rlist->rl_rgrps, sizeof(struct gfs2_holder), |
Steven Whitehouse | dd894be | 2006-07-27 14:29:00 -0400 | [diff] [blame] | 2406 | GFP_NOFS | __GFP_NOFAIL); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2407 | for (x = 0; x < rlist->rl_rgrps; x++) |
| 2408 | gfs2_holder_init(rlist->rl_rgd[x]->rd_gl, |
Bob Peterson | fe6c991 | 2008-01-28 11:13:02 -0600 | [diff] [blame] | 2409 | state, 0, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2410 | &rlist->rl_ghs[x]); |
| 2411 | } |
| 2412 | |
| 2413 | /** |
| 2414 | * gfs2_rlist_free - free a resource group list |
| 2415 | * @list: the list of resource groups |
| 2416 | * |
| 2417 | */ |
| 2418 | |
| 2419 | void gfs2_rlist_free(struct gfs2_rgrp_list *rlist) |
| 2420 | { |
| 2421 | unsigned int x; |
| 2422 | |
| 2423 | kfree(rlist->rl_rgd); |
| 2424 | |
| 2425 | if (rlist->rl_ghs) { |
| 2426 | for (x = 0; x < rlist->rl_rgrps; x++) |
| 2427 | gfs2_holder_uninit(&rlist->rl_ghs[x]); |
| 2428 | kfree(rlist->rl_ghs); |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 2429 | rlist->rl_ghs = NULL; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2430 | } |
| 2431 | } |
| 2432 | |