2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
10 #include <linux/slab.h>
11 #include <linux/spinlock.h>
12 #include <linux/completion.h>
13 #include <linux/buffer_head.h>
15 #include <linux/gfs2_ondisk.h>
16 #include <linux/lm_interface.h>
33 #define BFITNOENT ((u32)~0)
36 * These routines are used by the resource group routines (rgrp.c)
37 * to keep track of block allocation. Each block is represented by two
38 * bits. So, each byte represents GFS2_NBBY (i.e. 4) blocks.
41 * 1 = Used (not metadata)
42 * 2 = Unlinked (still in use) inode
46 static const char valid_change[16] = {
54 static u32 rgblk_search(struct gfs2_rgrpd *rgd, u32 goal,
55 unsigned char old_state, unsigned char new_state);
58 * gfs2_setbit - Set a bit in the bitmaps
59 * @buffer: the buffer that holds the bitmaps
60 * @buflen: the length (in bytes) of the buffer
61 * @block: the block to set
62 * @new_state: the new state of the block
66 static void gfs2_setbit(struct gfs2_rgrpd *rgd, unsigned char *buffer,
67 unsigned int buflen, u32 block,
68 unsigned char new_state)
70 unsigned char *byte, *end, cur_state;
73 byte = buffer + (block / GFS2_NBBY);
74 bit = (block % GFS2_NBBY) * GFS2_BIT_SIZE;
75 end = buffer + buflen;
77 gfs2_assert(rgd->rd_sbd, byte < end);
79 cur_state = (*byte >> bit) & GFS2_BIT_MASK;
81 if (valid_change[new_state * 4 + cur_state]) {
82 *byte ^= cur_state << bit;
83 *byte |= new_state << bit;
85 gfs2_consist_rgrpd(rgd);
89 * gfs2_testbit - test a bit in the bitmaps
90 * @buffer: the buffer that holds the bitmaps
91 * @buflen: the length (in bytes) of the buffer
92 * @block: the block to read
96 static unsigned char gfs2_testbit(struct gfs2_rgrpd *rgd, unsigned char *buffer,
97 unsigned int buflen, u32 block)
99 unsigned char *byte, *end, cur_state;
102 byte = buffer + (block / GFS2_NBBY);
103 bit = (block % GFS2_NBBY) * GFS2_BIT_SIZE;
104 end = buffer + buflen;
106 gfs2_assert(rgd->rd_sbd, byte < end);
108 cur_state = (*byte >> bit) & GFS2_BIT_MASK;
114 * gfs2_bitfit - Search an rgrp's bitmap buffer to find a bit-pair representing
115 * a block in a given allocation state.
116 * @buffer: the buffer that holds the bitmaps
117 * @buflen: the length (in bytes) of the buffer
118 * @goal: start search at this block's bit-pair (within @buffer)
119 * @old_state: GFS2_BLKST_XXX the state of the block we're looking for;
120 * bit 0 = alloc(1)/free(0), bit 1 = meta(1)/data(0)
122 * Scope of @goal and returned block number is only within this bitmap buffer,
123 * not entire rgrp or filesystem. @buffer will be offset from the actual
124 * beginning of a bitmap block buffer, skipping any header structures.
126 * Return: the block number (bitmap buffer scope) that was found
129 static u32 gfs2_bitfit(struct gfs2_rgrpd *rgd, unsigned char *buffer,
130 unsigned int buflen, u32 goal,
131 unsigned char old_state)
133 unsigned char *byte, *end, alloc;
137 byte = buffer + (goal / GFS2_NBBY);
138 bit = (goal % GFS2_NBBY) * GFS2_BIT_SIZE;
139 end = buffer + buflen;
140 alloc = (old_state & 1) ? 0 : 0x55;
143 if ((*byte & 0x55) == alloc) {
144 blk += (8 - bit) >> 1;
152 if (((*byte >> bit) & GFS2_BIT_MASK) == old_state)
155 bit += GFS2_BIT_SIZE;
168 * gfs2_bitcount - count the number of bits in a certain state
169 * @buffer: the buffer that holds the bitmaps
170 * @buflen: the length (in bytes) of the buffer
171 * @state: the state of the block we're looking for
173 * Returns: The number of bits
176 static u32 gfs2_bitcount(struct gfs2_rgrpd *rgd, unsigned char *buffer,
177 unsigned int buflen, unsigned char state)
179 unsigned char *byte = buffer;
180 unsigned char *end = buffer + buflen;
181 unsigned char state1 = state << 2;
182 unsigned char state2 = state << 4;
183 unsigned char state3 = state << 6;
186 for (; byte < end; byte++) {
187 if (((*byte) & 0x03) == state)
189 if (((*byte) & 0x0C) == state1)
191 if (((*byte) & 0x30) == state2)
193 if (((*byte) & 0xC0) == state3)
201 * gfs2_rgrp_verify - Verify that a resource group is consistent
202 * @sdp: the filesystem
207 void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd)
209 struct gfs2_sbd *sdp = rgd->rd_sbd;
210 struct gfs2_bitmap *bi = NULL;
211 u32 length = rgd->rd_length;
215 memset(count, 0, 4 * sizeof(u32));
217 /* Count # blocks in each of 4 possible allocation states */
218 for (buf = 0; buf < length; buf++) {
219 bi = rgd->rd_bits + buf;
220 for (x = 0; x < 4; x++)
221 count[x] += gfs2_bitcount(rgd,
227 if (count[0] != rgd->rd_rg.rg_free) {
228 if (gfs2_consist_rgrpd(rgd))
229 fs_err(sdp, "free data mismatch: %u != %u\n",
230 count[0], rgd->rd_rg.rg_free);
236 rgd->rd_rg.rg_dinodes;
237 if (count[1] + count[2] != tmp) {
238 if (gfs2_consist_rgrpd(rgd))
239 fs_err(sdp, "used data mismatch: %u != %u\n",
244 if (count[3] != rgd->rd_rg.rg_dinodes) {
245 if (gfs2_consist_rgrpd(rgd))
246 fs_err(sdp, "used metadata mismatch: %u != %u\n",
247 count[3], rgd->rd_rg.rg_dinodes);
251 if (count[2] > count[3]) {
252 if (gfs2_consist_rgrpd(rgd))
253 fs_err(sdp, "unlinked inodes > inodes: %u\n",
260 static inline int rgrp_contains_block(struct gfs2_rgrpd *rgd, u64 block)
262 u64 first = rgd->rd_data0;
263 u64 last = first + rgd->rd_data;
264 return first <= block && block < last;
268 * gfs2_blk2rgrpd - Find resource group for a given data/meta block number
269 * @sdp: The GFS2 superblock
270 * @n: The data block number
272 * Returns: The resource group, or NULL if not found
275 struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk)
277 struct gfs2_rgrpd *rgd;
279 spin_lock(&sdp->sd_rindex_spin);
281 list_for_each_entry(rgd, &sdp->sd_rindex_mru_list, rd_list_mru) {
282 if (rgrp_contains_block(rgd, blk)) {
283 list_move(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list);
284 spin_unlock(&sdp->sd_rindex_spin);
289 spin_unlock(&sdp->sd_rindex_spin);
295 * gfs2_rgrpd_get_first - get the first Resource Group in the filesystem
296 * @sdp: The GFS2 superblock
298 * Returns: The first rgrp in the filesystem
301 struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp)
303 gfs2_assert(sdp, !list_empty(&sdp->sd_rindex_list));
304 return list_entry(sdp->sd_rindex_list.next, struct gfs2_rgrpd, rd_list);
308 * gfs2_rgrpd_get_next - get the next RG
311 * Returns: The next rgrp
314 struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd)
316 if (rgd->rd_list.next == &rgd->rd_sbd->sd_rindex_list)
318 return list_entry(rgd->rd_list.next, struct gfs2_rgrpd, rd_list);
321 static void clear_rgrpdi(struct gfs2_sbd *sdp)
323 struct list_head *head;
324 struct gfs2_rgrpd *rgd;
325 struct gfs2_glock *gl;
327 spin_lock(&sdp->sd_rindex_spin);
328 sdp->sd_rindex_forward = NULL;
329 head = &sdp->sd_rindex_recent_list;
330 while (!list_empty(head)) {
331 rgd = list_entry(head->next, struct gfs2_rgrpd, rd_recent);
332 list_del(&rgd->rd_recent);
334 spin_unlock(&sdp->sd_rindex_spin);
336 head = &sdp->sd_rindex_list;
337 while (!list_empty(head)) {
338 rgd = list_entry(head->next, struct gfs2_rgrpd, rd_list);
341 list_del(&rgd->rd_list);
342 list_del(&rgd->rd_list_mru);
345 gl->gl_object = NULL;
354 void gfs2_clear_rgrpd(struct gfs2_sbd *sdp)
356 mutex_lock(&sdp->sd_rindex_mutex);
358 mutex_unlock(&sdp->sd_rindex_mutex);
361 static void gfs2_rindex_print(const struct gfs2_rgrpd *rgd)
363 printk(KERN_INFO " ri_addr = %llu\n", (unsigned long long)rgd->rd_addr);
364 printk(KERN_INFO " ri_length = %u\n", rgd->rd_length);
365 printk(KERN_INFO " ri_data0 = %llu\n", (unsigned long long)rgd->rd_data0);
366 printk(KERN_INFO " ri_data = %u\n", rgd->rd_data);
367 printk(KERN_INFO " ri_bitbytes = %u\n", rgd->rd_bitbytes);
371 * gfs2_compute_bitstructs - Compute the bitmap sizes
372 * @rgd: The resource group descriptor
374 * Calculates bitmap descriptors, one for each block that contains bitmap data
379 static int compute_bitstructs(struct gfs2_rgrpd *rgd)
381 struct gfs2_sbd *sdp = rgd->rd_sbd;
382 struct gfs2_bitmap *bi;
383 u32 length = rgd->rd_length; /* # blocks in hdr & bitmap */
384 u32 bytes_left, bytes;
390 rgd->rd_bits = kcalloc(length, sizeof(struct gfs2_bitmap), GFP_NOFS);
394 bytes_left = rgd->rd_bitbytes;
396 for (x = 0; x < length; x++) {
397 bi = rgd->rd_bits + x;
399 /* small rgrp; bitmap stored completely in header block */
402 bi->bi_offset = sizeof(struct gfs2_rgrp);
407 bytes = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_rgrp);
408 bi->bi_offset = sizeof(struct gfs2_rgrp);
412 } else if (x + 1 == length) {
414 bi->bi_offset = sizeof(struct gfs2_meta_header);
415 bi->bi_start = rgd->rd_bitbytes - bytes_left;
419 bytes = sdp->sd_sb.sb_bsize -
420 sizeof(struct gfs2_meta_header);
421 bi->bi_offset = sizeof(struct gfs2_meta_header);
422 bi->bi_start = rgd->rd_bitbytes - bytes_left;
430 gfs2_consist_rgrpd(rgd);
433 bi = rgd->rd_bits + (length - 1);
434 if ((bi->bi_start + bi->bi_len) * GFS2_NBBY != rgd->rd_data) {
435 if (gfs2_consist_rgrpd(rgd)) {
436 gfs2_rindex_print(rgd);
437 fs_err(sdp, "start=%u len=%u offset=%u\n",
438 bi->bi_start, bi->bi_len, bi->bi_offset);
447 * gfs2_ri_total - Total up the file system space, according to the rindex.
450 u64 gfs2_ri_total(struct gfs2_sbd *sdp)
453 struct inode *inode = sdp->sd_rindex;
454 struct gfs2_inode *ip = GFS2_I(inode);
455 char buf[sizeof(struct gfs2_rindex)];
456 struct file_ra_state ra_state;
459 mutex_lock(&sdp->sd_rindex_mutex);
460 file_ra_state_init(&ra_state, inode->i_mapping);
461 for (rgrps = 0;; rgrps++) {
462 loff_t pos = rgrps * sizeof(struct gfs2_rindex);
464 if (pos + sizeof(struct gfs2_rindex) >= ip->i_di.di_size)
466 error = gfs2_internal_read(ip, &ra_state, buf, &pos,
467 sizeof(struct gfs2_rindex));
468 if (error != sizeof(struct gfs2_rindex))
470 total_data += be32_to_cpu(((struct gfs2_rindex *)buf)->ri_data);
472 mutex_unlock(&sdp->sd_rindex_mutex);
476 static void gfs2_rindex_in(struct gfs2_rgrpd *rgd, const void *buf)
478 const struct gfs2_rindex *str = buf;
480 rgd->rd_addr = be64_to_cpu(str->ri_addr);
481 rgd->rd_length = be32_to_cpu(str->ri_length);
482 rgd->rd_data0 = be64_to_cpu(str->ri_data0);
483 rgd->rd_data = be32_to_cpu(str->ri_data);
484 rgd->rd_bitbytes = be32_to_cpu(str->ri_bitbytes);
488 * read_rindex_entry - Pull in a new resource index entry from the disk
489 * @gl: The glock covering the rindex inode
491 * Returns: 0 on success, error code otherwise
494 static int read_rindex_entry(struct gfs2_inode *ip,
495 struct file_ra_state *ra_state)
497 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
498 loff_t pos = sdp->sd_rgrps * sizeof(struct gfs2_rindex);
499 char buf[sizeof(struct gfs2_rindex)];
501 struct gfs2_rgrpd *rgd;
503 error = gfs2_internal_read(ip, ra_state, buf, &pos,
504 sizeof(struct gfs2_rindex));
507 if (error != sizeof(struct gfs2_rindex)) {
513 rgd = kzalloc(sizeof(struct gfs2_rgrpd), GFP_NOFS);
518 mutex_init(&rgd->rd_mutex);
519 lops_init_le(&rgd->rd_le, &gfs2_rg_lops);
522 list_add_tail(&rgd->rd_list, &sdp->sd_rindex_list);
523 list_add_tail(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list);
525 gfs2_rindex_in(rgd, buf);
526 error = compute_bitstructs(rgd);
530 error = gfs2_glock_get(sdp, rgd->rd_addr,
531 &gfs2_rgrp_glops, CREATE, &rgd->rd_gl);
535 rgd->rd_gl->gl_object = rgd;
536 rgd->rd_rg_vn = rgd->rd_gl->gl_vn - 1;
537 rgd->rd_flags |= GFS2_RDF_CHECK;
542 * gfs2_ri_update - Pull in a new resource index from the disk
543 * @ip: pointer to the rindex inode
545 * Returns: 0 on successful update, error code otherwise
548 static int gfs2_ri_update(struct gfs2_inode *ip)
550 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
551 struct inode *inode = &ip->i_inode;
552 struct file_ra_state ra_state;
553 u64 rgrp_count = ip->i_di.di_size;
556 if (do_div(rgrp_count, sizeof(struct gfs2_rindex))) {
557 gfs2_consist_inode(ip);
563 file_ra_state_init(&ra_state, inode->i_mapping);
564 for (sdp->sd_rgrps = 0; sdp->sd_rgrps < rgrp_count; sdp->sd_rgrps++) {
565 error = read_rindex_entry(ip, &ra_state);
572 sdp->sd_rindex_vn = ip->i_gl->gl_vn;
577 * gfs2_ri_update_special - Pull in a new resource index from the disk
579 * This is a special version that's safe to call from gfs2_inplace_reserve_i.
580 * In this case we know that we don't have any resource groups in memory yet.
582 * @ip: pointer to the rindex inode
584 * Returns: 0 on successful update, error code otherwise
586 static int gfs2_ri_update_special(struct gfs2_inode *ip)
588 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
589 struct inode *inode = &ip->i_inode;
590 struct file_ra_state ra_state;
593 file_ra_state_init(&ra_state, inode->i_mapping);
594 for (sdp->sd_rgrps = 0;; sdp->sd_rgrps++) {
595 /* Ignore partials */
596 if ((sdp->sd_rgrps + 1) * sizeof(struct gfs2_rindex) >
599 error = read_rindex_entry(ip, &ra_state);
606 sdp->sd_rindex_vn = ip->i_gl->gl_vn;
611 * gfs2_rindex_hold - Grab a lock on the rindex
612 * @sdp: The GFS2 superblock
613 * @ri_gh: the glock holder
615 * We grab a lock on the rindex inode to make sure that it doesn't
616 * change whilst we are performing an operation. We keep this lock
617 * for quite long periods of time compared to other locks. This
618 * doesn't matter, since it is shared and it is very, very rarely
619 * accessed in the exclusive mode (i.e. only when expanding the filesystem).
621 * This makes sure that we're using the latest copy of the resource index
622 * special file, which might have been updated if someone expanded the
623 * filesystem (via gfs2_grow utility), which adds new resource groups.
625 * Returns: 0 on success, error code otherwise
628 int gfs2_rindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ri_gh)
630 struct gfs2_inode *ip = GFS2_I(sdp->sd_rindex);
631 struct gfs2_glock *gl = ip->i_gl;
634 error = gfs2_glock_nq_init(gl, LM_ST_SHARED, 0, ri_gh);
638 /* Read new copy from disk if we don't have the latest */
639 if (sdp->sd_rindex_vn != gl->gl_vn) {
640 mutex_lock(&sdp->sd_rindex_mutex);
641 if (sdp->sd_rindex_vn != gl->gl_vn) {
642 error = gfs2_ri_update(ip);
644 gfs2_glock_dq_uninit(ri_gh);
646 mutex_unlock(&sdp->sd_rindex_mutex);
652 static void gfs2_rgrp_in(struct gfs2_rgrp_host *rg, const void *buf)
654 const struct gfs2_rgrp *str = buf;
656 rg->rg_flags = be32_to_cpu(str->rg_flags);
657 rg->rg_free = be32_to_cpu(str->rg_free);
658 rg->rg_dinodes = be32_to_cpu(str->rg_dinodes);
659 rg->rg_igeneration = be64_to_cpu(str->rg_igeneration);
662 static void gfs2_rgrp_out(const struct gfs2_rgrp_host *rg, void *buf)
664 struct gfs2_rgrp *str = buf;
666 str->rg_flags = cpu_to_be32(rg->rg_flags);
667 str->rg_free = cpu_to_be32(rg->rg_free);
668 str->rg_dinodes = cpu_to_be32(rg->rg_dinodes);
669 str->__pad = cpu_to_be32(0);
670 str->rg_igeneration = cpu_to_be64(rg->rg_igeneration);
671 memset(&str->rg_reserved, 0, sizeof(str->rg_reserved));
675 * gfs2_rgrp_bh_get - Read in a RG's header and bitmaps
676 * @rgd: the struct gfs2_rgrpd describing the RG to read in
678 * Read in all of a Resource Group's header and bitmap blocks.
679 * Caller must eventually call gfs2_rgrp_relse() to free the bitmaps.
684 int gfs2_rgrp_bh_get(struct gfs2_rgrpd *rgd)
686 struct gfs2_sbd *sdp = rgd->rd_sbd;
687 struct gfs2_glock *gl = rgd->rd_gl;
688 unsigned int length = rgd->rd_length;
689 struct gfs2_bitmap *bi;
693 mutex_lock(&rgd->rd_mutex);
695 spin_lock(&sdp->sd_rindex_spin);
696 if (rgd->rd_bh_count) {
698 spin_unlock(&sdp->sd_rindex_spin);
699 mutex_unlock(&rgd->rd_mutex);
702 spin_unlock(&sdp->sd_rindex_spin);
704 for (x = 0; x < length; x++) {
705 bi = rgd->rd_bits + x;
706 error = gfs2_meta_read(gl, rgd->rd_addr + x, 0, &bi->bi_bh);
711 for (y = length; y--;) {
712 bi = rgd->rd_bits + y;
713 error = gfs2_meta_wait(sdp, bi->bi_bh);
716 if (gfs2_metatype_check(sdp, bi->bi_bh, y ? GFS2_METATYPE_RB :
723 if (rgd->rd_rg_vn != gl->gl_vn) {
724 gfs2_rgrp_in(&rgd->rd_rg, (rgd->rd_bits[0].bi_bh)->b_data);
725 rgd->rd_rg_vn = gl->gl_vn;
728 spin_lock(&sdp->sd_rindex_spin);
729 rgd->rd_free_clone = rgd->rd_rg.rg_free;
731 spin_unlock(&sdp->sd_rindex_spin);
733 mutex_unlock(&rgd->rd_mutex);
739 bi = rgd->rd_bits + x;
742 gfs2_assert_warn(sdp, !bi->bi_clone);
744 mutex_unlock(&rgd->rd_mutex);
749 void gfs2_rgrp_bh_hold(struct gfs2_rgrpd *rgd)
751 struct gfs2_sbd *sdp = rgd->rd_sbd;
753 spin_lock(&sdp->sd_rindex_spin);
754 gfs2_assert_warn(rgd->rd_sbd, rgd->rd_bh_count);
756 spin_unlock(&sdp->sd_rindex_spin);
760 * gfs2_rgrp_bh_put - Release RG bitmaps read in with gfs2_rgrp_bh_get()
761 * @rgd: the struct gfs2_rgrpd describing the RG to read in
765 void gfs2_rgrp_bh_put(struct gfs2_rgrpd *rgd)
767 struct gfs2_sbd *sdp = rgd->rd_sbd;
768 int x, length = rgd->rd_length;
770 spin_lock(&sdp->sd_rindex_spin);
771 gfs2_assert_warn(rgd->rd_sbd, rgd->rd_bh_count);
772 if (--rgd->rd_bh_count) {
773 spin_unlock(&sdp->sd_rindex_spin);
777 for (x = 0; x < length; x++) {
778 struct gfs2_bitmap *bi = rgd->rd_bits + x;
785 spin_unlock(&sdp->sd_rindex_spin);
788 void gfs2_rgrp_repolish_clones(struct gfs2_rgrpd *rgd)
790 struct gfs2_sbd *sdp = rgd->rd_sbd;
791 unsigned int length = rgd->rd_length;
794 for (x = 0; x < length; x++) {
795 struct gfs2_bitmap *bi = rgd->rd_bits + x;
798 memcpy(bi->bi_clone + bi->bi_offset,
799 bi->bi_bh->b_data + bi->bi_offset, bi->bi_len);
802 spin_lock(&sdp->sd_rindex_spin);
803 rgd->rd_free_clone = rgd->rd_rg.rg_free;
804 spin_unlock(&sdp->sd_rindex_spin);
808 * gfs2_alloc_get - get the struct gfs2_alloc structure for an inode
809 * @ip: the incore GFS2 inode structure
811 * Returns: the struct gfs2_alloc
814 struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip)
816 struct gfs2_alloc *al = &ip->i_alloc;
818 /* FIXME: Should assert that the correct locks are held here... */
819 memset(al, 0, sizeof(*al));
824 * try_rgrp_fit - See if a given reservation will fit in a given RG
826 * @al: the struct gfs2_alloc structure describing the reservation
828 * If there's room for the requested blocks to be allocated from the RG:
829 * Sets the $al_rgd field in @al.
831 * Returns: 1 on success (it fits), 0 on failure (it doesn't fit)
834 static int try_rgrp_fit(struct gfs2_rgrpd *rgd, struct gfs2_alloc *al)
836 struct gfs2_sbd *sdp = rgd->rd_sbd;
839 if (rgd->rd_rg.rg_flags & GFS2_RGF_NOALLOC)
842 spin_lock(&sdp->sd_rindex_spin);
843 if (rgd->rd_free_clone >= al->al_requested) {
847 spin_unlock(&sdp->sd_rindex_spin);
853 * try_rgrp_unlink - Look for any unlinked, allocated, but unused inodes
856 * Returns: The inode, if one has been found
859 static struct inode *try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked)
866 if (goal >= rgd->rd_data)
868 goal = rgblk_search(rgd, goal, GFS2_BLKST_UNLINKED,
869 GFS2_BLKST_UNLINKED);
870 if (goal == BFITNOENT)
872 no_addr = goal + rgd->rd_data0;
874 if (no_addr < *last_unlinked)
876 *last_unlinked = no_addr;
877 inode = gfs2_inode_lookup(rgd->rd_sbd->sd_vfs, DT_UNKNOWN,
883 rgd->rd_flags &= ~GFS2_RDF_CHECK;
888 * recent_rgrp_first - get first RG from "recent" list
889 * @sdp: The GFS2 superblock
890 * @rglast: address of the rgrp used last
892 * Returns: The first rgrp in the recent list
895 static struct gfs2_rgrpd *recent_rgrp_first(struct gfs2_sbd *sdp,
898 struct gfs2_rgrpd *rgd = NULL;
900 spin_lock(&sdp->sd_rindex_spin);
902 if (list_empty(&sdp->sd_rindex_recent_list))
908 list_for_each_entry(rgd, &sdp->sd_rindex_recent_list, rd_recent) {
909 if (rgd->rd_addr == rglast)
914 rgd = list_entry(sdp->sd_rindex_recent_list.next, struct gfs2_rgrpd,
917 spin_unlock(&sdp->sd_rindex_spin);
922 * recent_rgrp_next - get next RG from "recent" list
923 * @cur_rgd: current rgrp
926 * Returns: The next rgrp in the recent list
929 static struct gfs2_rgrpd *recent_rgrp_next(struct gfs2_rgrpd *cur_rgd,
932 struct gfs2_sbd *sdp = cur_rgd->rd_sbd;
933 struct list_head *head;
934 struct gfs2_rgrpd *rgd;
936 spin_lock(&sdp->sd_rindex_spin);
938 head = &sdp->sd_rindex_recent_list;
940 list_for_each_entry(rgd, head, rd_recent) {
941 if (rgd == cur_rgd) {
942 if (cur_rgd->rd_recent.next != head)
943 rgd = list_entry(cur_rgd->rd_recent.next,
944 struct gfs2_rgrpd, rd_recent);
949 list_del(&cur_rgd->rd_recent);
956 if (!list_empty(head))
957 rgd = list_entry(head->next, struct gfs2_rgrpd, rd_recent);
960 spin_unlock(&sdp->sd_rindex_spin);
965 * recent_rgrp_add - add an RG to tail of "recent" list
966 * @new_rgd: The rgrp to add
970 static void recent_rgrp_add(struct gfs2_rgrpd *new_rgd)
972 struct gfs2_sbd *sdp = new_rgd->rd_sbd;
973 struct gfs2_rgrpd *rgd;
974 unsigned int count = 0;
975 unsigned int max = sdp->sd_rgrps / gfs2_jindex_size(sdp);
977 spin_lock(&sdp->sd_rindex_spin);
979 list_for_each_entry(rgd, &sdp->sd_rindex_recent_list, rd_recent) {
986 list_add_tail(&new_rgd->rd_recent, &sdp->sd_rindex_recent_list);
989 spin_unlock(&sdp->sd_rindex_spin);
993 * forward_rgrp_get - get an rgrp to try next from full list
994 * @sdp: The GFS2 superblock
996 * Returns: The rgrp to try next
999 static struct gfs2_rgrpd *forward_rgrp_get(struct gfs2_sbd *sdp)
1001 struct gfs2_rgrpd *rgd;
1002 unsigned int journals = gfs2_jindex_size(sdp);
1003 unsigned int rg = 0, x;
1005 spin_lock(&sdp->sd_rindex_spin);
1007 rgd = sdp->sd_rindex_forward;
1009 if (sdp->sd_rgrps >= journals)
1010 rg = sdp->sd_rgrps * sdp->sd_jdesc->jd_jid / journals;
1012 for (x = 0, rgd = gfs2_rgrpd_get_first(sdp); x < rg;
1013 x++, rgd = gfs2_rgrpd_get_next(rgd))
1016 sdp->sd_rindex_forward = rgd;
1019 spin_unlock(&sdp->sd_rindex_spin);
1025 * forward_rgrp_set - set the forward rgrp pointer
1026 * @sdp: the filesystem
1027 * @rgd: The new forward rgrp
1031 static void forward_rgrp_set(struct gfs2_sbd *sdp, struct gfs2_rgrpd *rgd)
1033 spin_lock(&sdp->sd_rindex_spin);
1034 sdp->sd_rindex_forward = rgd;
1035 spin_unlock(&sdp->sd_rindex_spin);
1039 * get_local_rgrp - Choose and lock a rgrp for allocation
1040 * @ip: the inode to reserve space for
1041 * @rgp: the chosen and locked rgrp
1043 * Try to acquire rgrp in way which avoids contending with others.
1048 static struct inode *get_local_rgrp(struct gfs2_inode *ip, u64 *last_unlinked)
1050 struct inode *inode = NULL;
1051 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1052 struct gfs2_rgrpd *rgd, *begin = NULL;
1053 struct gfs2_alloc *al = &ip->i_alloc;
1054 int flags = LM_FLAG_TRY;
1059 /* Try recently successful rgrps */
1061 rgd = recent_rgrp_first(sdp, ip->i_last_rg_alloc);
1064 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE,
1065 LM_FLAG_TRY, &al->al_rgd_gh);
1068 if (try_rgrp_fit(rgd, al))
1070 if (rgd->rd_flags & GFS2_RDF_CHECK)
1071 inode = try_rgrp_unlink(rgd, last_unlinked);
1072 gfs2_glock_dq_uninit(&al->al_rgd_gh);
1075 rgd = recent_rgrp_next(rgd, 1);
1079 rgd = recent_rgrp_next(rgd, 0);
1083 return ERR_PTR(error);
1087 /* Go through full list of rgrps */
1089 begin = rgd = forward_rgrp_get(sdp);
1092 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, flags,
1096 if (try_rgrp_fit(rgd, al))
1098 if (rgd->rd_flags & GFS2_RDF_CHECK)
1099 inode = try_rgrp_unlink(rgd, last_unlinked);
1100 gfs2_glock_dq_uninit(&al->al_rgd_gh);
1110 return ERR_PTR(error);
1113 rgd = gfs2_rgrpd_get_next(rgd);
1115 rgd = gfs2_rgrpd_get_first(sdp);
1119 return ERR_PTR(-ENOSPC);
1124 gfs2_log_flush(sdp, NULL);
1129 ip->i_last_rg_alloc = rgd->rd_addr;
1132 recent_rgrp_add(rgd);
1133 rgd = gfs2_rgrpd_get_next(rgd);
1135 rgd = gfs2_rgrpd_get_first(sdp);
1136 forward_rgrp_set(sdp, rgd);
1143 * gfs2_inplace_reserve_i - Reserve space in the filesystem
1144 * @ip: the inode to reserve space for
1149 int gfs2_inplace_reserve_i(struct gfs2_inode *ip, char *file, unsigned int line)
1151 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1152 struct gfs2_alloc *al = &ip->i_alloc;
1153 struct inode *inode;
1155 u64 last_unlinked = 0;
1157 if (gfs2_assert_warn(sdp, al->al_requested))
1161 /* We need to hold the rindex unless the inode we're using is
1162 the rindex itself, in which case it's already held. */
1163 if (ip != GFS2_I(sdp->sd_rindex))
1164 error = gfs2_rindex_hold(sdp, &al->al_ri_gh);
1165 else if (!sdp->sd_rgrps) /* We may not have the rindex read in, so: */
1166 error = gfs2_ri_update_special(ip);
1171 inode = get_local_rgrp(ip, &last_unlinked);
1173 if (ip != GFS2_I(sdp->sd_rindex))
1174 gfs2_glock_dq_uninit(&al->al_ri_gh);
1176 return PTR_ERR(inode);
1178 gfs2_log_flush(sdp, NULL);
1189 * gfs2_inplace_release - release an inplace reservation
1190 * @ip: the inode the reservation was taken out on
1192 * Release a reservation made by gfs2_inplace_reserve().
1195 void gfs2_inplace_release(struct gfs2_inode *ip)
1197 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1198 struct gfs2_alloc *al = &ip->i_alloc;
1200 if (gfs2_assert_warn(sdp, al->al_alloced <= al->al_requested) == -1)
1201 fs_warn(sdp, "al_alloced = %u, al_requested = %u "
1202 "al_file = %s, al_line = %u\n",
1203 al->al_alloced, al->al_requested, al->al_file,
1207 gfs2_glock_dq_uninit(&al->al_rgd_gh);
1208 if (ip != GFS2_I(sdp->sd_rindex))
1209 gfs2_glock_dq_uninit(&al->al_ri_gh);
1213 * gfs2_get_block_type - Check a block in a RG is of given type
1214 * @rgd: the resource group holding the block
1215 * @block: the block number
1217 * Returns: The block type (GFS2_BLKST_*)
1220 unsigned char gfs2_get_block_type(struct gfs2_rgrpd *rgd, u64 block)
1222 struct gfs2_bitmap *bi = NULL;
1223 u32 length, rgrp_block, buf_block;
1227 length = rgd->rd_length;
1228 rgrp_block = block - rgd->rd_data0;
1230 for (buf = 0; buf < length; buf++) {
1231 bi = rgd->rd_bits + buf;
1232 if (rgrp_block < (bi->bi_start + bi->bi_len) * GFS2_NBBY)
1236 gfs2_assert(rgd->rd_sbd, buf < length);
1237 buf_block = rgrp_block - bi->bi_start * GFS2_NBBY;
1239 type = gfs2_testbit(rgd, bi->bi_bh->b_data + bi->bi_offset,
1240 bi->bi_len, buf_block);
1246 * rgblk_search - find a block in @old_state, change allocation
1247 * state to @new_state
1248 * @rgd: the resource group descriptor
1249 * @goal: the goal block within the RG (start here to search for avail block)
1250 * @old_state: GFS2_BLKST_XXX the before-allocation state to find
1251 * @new_state: GFS2_BLKST_XXX the after-allocation block state
1253 * Walk rgrp's bitmap to find bits that represent a block in @old_state.
1254 * Add the found bitmap buffer to the transaction.
1255 * Set the found bits to @new_state to change block's allocation state.
1257 * This function never fails, because we wouldn't call it unless we
1258 * know (from reservation results, etc.) that a block is available.
1260 * Scope of @goal and returned block is just within rgrp, not the whole
1263 * Returns: the block number allocated
1266 static u32 rgblk_search(struct gfs2_rgrpd *rgd, u32 goal,
1267 unsigned char old_state, unsigned char new_state)
1269 struct gfs2_bitmap *bi = NULL;
1270 u32 length = rgd->rd_length;
1272 unsigned int buf, x;
1274 /* Find bitmap block that contains bits for goal block */
1275 for (buf = 0; buf < length; buf++) {
1276 bi = rgd->rd_bits + buf;
1277 if (goal < (bi->bi_start + bi->bi_len) * GFS2_NBBY)
1281 gfs2_assert(rgd->rd_sbd, buf < length);
1283 /* Convert scope of "goal" from rgrp-wide to within found bit block */
1284 goal -= bi->bi_start * GFS2_NBBY;
1286 /* Search (up to entire) bitmap in this rgrp for allocatable block.
1287 "x <= length", instead of "x < length", because we typically start
1288 the search in the middle of a bit block, but if we can't find an
1289 allocatable block anywhere else, we want to be able wrap around and
1290 search in the first part of our first-searched bit block. */
1291 for (x = 0; x <= length; x++) {
1293 blk = gfs2_bitfit(rgd, bi->bi_clone + bi->bi_offset,
1294 bi->bi_len, goal, old_state);
1296 blk = gfs2_bitfit(rgd,
1297 bi->bi_bh->b_data + bi->bi_offset,
1298 bi->bi_len, goal, old_state);
1299 if (blk != BFITNOENT)
1302 /* Try next bitmap block (wrap back to rgrp header if at end) */
1303 buf = (buf + 1) % length;
1304 bi = rgd->rd_bits + buf;
1308 if (old_state != new_state) {
1309 gfs2_assert_withdraw(rgd->rd_sbd, blk != BFITNOENT);
1311 gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1);
1312 gfs2_setbit(rgd, bi->bi_bh->b_data + bi->bi_offset,
1313 bi->bi_len, blk, new_state);
1315 gfs2_setbit(rgd, bi->bi_clone + bi->bi_offset,
1316 bi->bi_len, blk, new_state);
1319 return (blk == BFITNOENT) ? blk : (bi->bi_start * GFS2_NBBY) + blk;
1323 * rgblk_free - Change alloc state of given block(s)
1324 * @sdp: the filesystem
1325 * @bstart: the start of a run of blocks to free
1326 * @blen: the length of the block run (all must lie within ONE RG!)
1327 * @new_state: GFS2_BLKST_XXX the after-allocation block state
1329 * Returns: Resource group containing the block(s)
1332 static struct gfs2_rgrpd *rgblk_free(struct gfs2_sbd *sdp, u64 bstart,
1333 u32 blen, unsigned char new_state)
1335 struct gfs2_rgrpd *rgd;
1336 struct gfs2_bitmap *bi = NULL;
1337 u32 length, rgrp_blk, buf_blk;
1340 rgd = gfs2_blk2rgrpd(sdp, bstart);
1342 if (gfs2_consist(sdp))
1343 fs_err(sdp, "block = %llu\n", (unsigned long long)bstart);
1347 length = rgd->rd_length;
1349 rgrp_blk = bstart - rgd->rd_data0;
1352 for (buf = 0; buf < length; buf++) {
1353 bi = rgd->rd_bits + buf;
1354 if (rgrp_blk < (bi->bi_start + bi->bi_len) * GFS2_NBBY)
1358 gfs2_assert(rgd->rd_sbd, buf < length);
1360 buf_blk = rgrp_blk - bi->bi_start * GFS2_NBBY;
1363 if (!bi->bi_clone) {
1364 bi->bi_clone = kmalloc(bi->bi_bh->b_size,
1365 GFP_NOFS | __GFP_NOFAIL);
1366 memcpy(bi->bi_clone + bi->bi_offset,
1367 bi->bi_bh->b_data + bi->bi_offset,
1370 gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1);
1371 gfs2_setbit(rgd, bi->bi_bh->b_data + bi->bi_offset,
1372 bi->bi_len, buf_blk, new_state);
1379 * gfs2_alloc_data - Allocate a data block
1380 * @ip: the inode to allocate the data block for
1382 * Returns: the allocated block
1385 u64 gfs2_alloc_data(struct gfs2_inode *ip)
1387 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1388 struct gfs2_alloc *al = &ip->i_alloc;
1389 struct gfs2_rgrpd *rgd = al->al_rgd;
1393 if (rgrp_contains_block(rgd, ip->i_di.di_goal_data))
1394 goal = ip->i_di.di_goal_data - rgd->rd_data0;
1396 goal = rgd->rd_last_alloc_data;
1398 blk = rgblk_search(rgd, goal, GFS2_BLKST_FREE, GFS2_BLKST_USED);
1399 BUG_ON(blk == BFITNOENT);
1400 rgd->rd_last_alloc_data = blk;
1402 block = rgd->rd_data0 + blk;
1403 ip->i_di.di_goal_data = block;
1405 gfs2_assert_withdraw(sdp, rgd->rd_rg.rg_free);
1406 rgd->rd_rg.rg_free--;
1408 gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
1409 gfs2_rgrp_out(&rgd->rd_rg, rgd->rd_bits[0].bi_bh->b_data);
1413 gfs2_statfs_change(sdp, 0, -1, 0);
1414 gfs2_quota_change(ip, +1, ip->i_inode.i_uid, ip->i_inode.i_gid);
1416 spin_lock(&sdp->sd_rindex_spin);
1417 rgd->rd_free_clone--;
1418 spin_unlock(&sdp->sd_rindex_spin);
1424 * gfs2_alloc_meta - Allocate a metadata block
1425 * @ip: the inode to allocate the metadata block for
1427 * Returns: the allocated block
1430 u64 gfs2_alloc_meta(struct gfs2_inode *ip)
1432 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1433 struct gfs2_alloc *al = &ip->i_alloc;
1434 struct gfs2_rgrpd *rgd = al->al_rgd;
1438 if (rgrp_contains_block(rgd, ip->i_di.di_goal_meta))
1439 goal = ip->i_di.di_goal_meta - rgd->rd_data0;
1441 goal = rgd->rd_last_alloc_meta;
1443 blk = rgblk_search(rgd, goal, GFS2_BLKST_FREE, GFS2_BLKST_USED);
1444 BUG_ON(blk == BFITNOENT);
1445 rgd->rd_last_alloc_meta = blk;
1447 block = rgd->rd_data0 + blk;
1448 ip->i_di.di_goal_meta = block;
1450 gfs2_assert_withdraw(sdp, rgd->rd_rg.rg_free);
1451 rgd->rd_rg.rg_free--;
1453 gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
1454 gfs2_rgrp_out(&rgd->rd_rg, rgd->rd_bits[0].bi_bh->b_data);
1458 gfs2_statfs_change(sdp, 0, -1, 0);
1459 gfs2_quota_change(ip, +1, ip->i_inode.i_uid, ip->i_inode.i_gid);
1460 gfs2_trans_add_unrevoke(sdp, block);
1462 spin_lock(&sdp->sd_rindex_spin);
1463 rgd->rd_free_clone--;
1464 spin_unlock(&sdp->sd_rindex_spin);
1470 * gfs2_alloc_di - Allocate a dinode
1471 * @dip: the directory that the inode is going in
1473 * Returns: the block allocated
1476 u64 gfs2_alloc_di(struct gfs2_inode *dip, u64 *generation)
1478 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
1479 struct gfs2_alloc *al = &dip->i_alloc;
1480 struct gfs2_rgrpd *rgd = al->al_rgd;
1484 blk = rgblk_search(rgd, rgd->rd_last_alloc_meta,
1485 GFS2_BLKST_FREE, GFS2_BLKST_DINODE);
1486 BUG_ON(blk == BFITNOENT);
1488 rgd->rd_last_alloc_meta = blk;
1490 block = rgd->rd_data0 + blk;
1492 gfs2_assert_withdraw(sdp, rgd->rd_rg.rg_free);
1493 rgd->rd_rg.rg_free--;
1494 rgd->rd_rg.rg_dinodes++;
1495 *generation = rgd->rd_rg.rg_igeneration++;
1496 gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
1497 gfs2_rgrp_out(&rgd->rd_rg, rgd->rd_bits[0].bi_bh->b_data);
1501 gfs2_statfs_change(sdp, 0, -1, +1);
1502 gfs2_trans_add_unrevoke(sdp, block);
1504 spin_lock(&sdp->sd_rindex_spin);
1505 rgd->rd_free_clone--;
1506 spin_unlock(&sdp->sd_rindex_spin);
1512 * gfs2_free_data - free a contiguous run of data block(s)
1513 * @ip: the inode these blocks are being freed from
1514 * @bstart: first block of a run of contiguous blocks
1515 * @blen: the length of the block run
1519 void gfs2_free_data(struct gfs2_inode *ip, u64 bstart, u32 blen)
1521 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1522 struct gfs2_rgrpd *rgd;
1524 rgd = rgblk_free(sdp, bstart, blen, GFS2_BLKST_FREE);
1528 rgd->rd_rg.rg_free += blen;
1530 gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
1531 gfs2_rgrp_out(&rgd->rd_rg, rgd->rd_bits[0].bi_bh->b_data);
1533 gfs2_trans_add_rg(rgd);
1535 gfs2_statfs_change(sdp, 0, +blen, 0);
1536 gfs2_quota_change(ip, -(s64)blen, ip->i_inode.i_uid, ip->i_inode.i_gid);
1540 * gfs2_free_meta - free a contiguous run of data block(s)
1541 * @ip: the inode these blocks are being freed from
1542 * @bstart: first block of a run of contiguous blocks
1543 * @blen: the length of the block run
1547 void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen)
1549 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1550 struct gfs2_rgrpd *rgd;
1552 rgd = rgblk_free(sdp, bstart, blen, GFS2_BLKST_FREE);
1556 rgd->rd_rg.rg_free += blen;
1558 gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
1559 gfs2_rgrp_out(&rgd->rd_rg, rgd->rd_bits[0].bi_bh->b_data);
1561 gfs2_trans_add_rg(rgd);
1563 gfs2_statfs_change(sdp, 0, +blen, 0);
1564 gfs2_quota_change(ip, -(s64)blen, ip->i_inode.i_uid, ip->i_inode.i_gid);
1565 gfs2_meta_wipe(ip, bstart, blen);
1568 void gfs2_unlink_di(struct inode *inode)
1570 struct gfs2_inode *ip = GFS2_I(inode);
1571 struct gfs2_sbd *sdp = GFS2_SB(inode);
1572 struct gfs2_rgrpd *rgd;
1573 u64 blkno = ip->i_no_addr;
1575 rgd = rgblk_free(sdp, blkno, 1, GFS2_BLKST_UNLINKED);
1578 gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
1579 gfs2_rgrp_out(&rgd->rd_rg, rgd->rd_bits[0].bi_bh->b_data);
1580 gfs2_trans_add_rg(rgd);
1583 static void gfs2_free_uninit_di(struct gfs2_rgrpd *rgd, u64 blkno)
1585 struct gfs2_sbd *sdp = rgd->rd_sbd;
1586 struct gfs2_rgrpd *tmp_rgd;
1588 tmp_rgd = rgblk_free(sdp, blkno, 1, GFS2_BLKST_FREE);
1591 gfs2_assert_withdraw(sdp, rgd == tmp_rgd);
1593 if (!rgd->rd_rg.rg_dinodes)
1594 gfs2_consist_rgrpd(rgd);
1595 rgd->rd_rg.rg_dinodes--;
1596 rgd->rd_rg.rg_free++;
1598 gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
1599 gfs2_rgrp_out(&rgd->rd_rg, rgd->rd_bits[0].bi_bh->b_data);
1601 gfs2_statfs_change(sdp, 0, +1, -1);
1602 gfs2_trans_add_rg(rgd);
1606 void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip)
1608 gfs2_free_uninit_di(rgd, ip->i_no_addr);
1609 gfs2_quota_change(ip, -1, ip->i_inode.i_uid, ip->i_inode.i_gid);
1610 gfs2_meta_wipe(ip, ip->i_no_addr, 1);
1614 * gfs2_rlist_add - add a RG to a list of RGs
1615 * @sdp: the filesystem
1616 * @rlist: the list of resource groups
1619 * Figure out what RG a block belongs to and add that RG to the list
1621 * FIXME: Don't use NOFAIL
1625 void gfs2_rlist_add(struct gfs2_sbd *sdp, struct gfs2_rgrp_list *rlist,
1628 struct gfs2_rgrpd *rgd;
1629 struct gfs2_rgrpd **tmp;
1630 unsigned int new_space;
1633 if (gfs2_assert_warn(sdp, !rlist->rl_ghs))
1636 rgd = gfs2_blk2rgrpd(sdp, block);
1638 if (gfs2_consist(sdp))
1639 fs_err(sdp, "block = %llu\n", (unsigned long long)block);
1643 for (x = 0; x < rlist->rl_rgrps; x++)
1644 if (rlist->rl_rgd[x] == rgd)
1647 if (rlist->rl_rgrps == rlist->rl_space) {
1648 new_space = rlist->rl_space + 10;
1650 tmp = kcalloc(new_space, sizeof(struct gfs2_rgrpd *),
1651 GFP_NOFS | __GFP_NOFAIL);
1653 if (rlist->rl_rgd) {
1654 memcpy(tmp, rlist->rl_rgd,
1655 rlist->rl_space * sizeof(struct gfs2_rgrpd *));
1656 kfree(rlist->rl_rgd);
1659 rlist->rl_space = new_space;
1660 rlist->rl_rgd = tmp;
1663 rlist->rl_rgd[rlist->rl_rgrps++] = rgd;
1667 * gfs2_rlist_alloc - all RGs have been added to the rlist, now allocate
1668 * and initialize an array of glock holders for them
1669 * @rlist: the list of resource groups
1670 * @state: the lock state to acquire the RG lock in
1671 * @flags: the modifier flags for the holder structures
1673 * FIXME: Don't use NOFAIL
1677 void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist, unsigned int state,
1682 rlist->rl_ghs = kcalloc(rlist->rl_rgrps, sizeof(struct gfs2_holder),
1683 GFP_NOFS | __GFP_NOFAIL);
1684 for (x = 0; x < rlist->rl_rgrps; x++)
1685 gfs2_holder_init(rlist->rl_rgd[x]->rd_gl,
1691 * gfs2_rlist_free - free a resource group list
1692 * @list: the list of resource groups
1696 void gfs2_rlist_free(struct gfs2_rgrp_list *rlist)
1700 kfree(rlist->rl_rgd);
1702 if (rlist->rl_ghs) {
1703 for (x = 0; x < rlist->rl_rgrps; x++)
1704 gfs2_holder_uninit(&rlist->rl_ghs[x]);
1705 kfree(rlist->rl_ghs);