diff options
Diffstat (limited to 'fs/gfs2/rgrp.c')
-rw-r--r-- | fs/gfs2/rgrp.c | 344 |
1 files changed, 94 insertions, 250 deletions
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c index 7f8af1e..00f6e3d 100644 --- a/fs/gfs2/rgrp.c +++ b/fs/gfs2/rgrp.c @@ -15,6 +15,7 @@ #include <linux/gfs2_ondisk.h> #include <linux/prefetch.h> #include <linux/blkdev.h> +#include <linux/rbtree.h> #include "gfs2.h" #include "incore.h" @@ -328,15 +329,25 @@ static inline int rgrp_contains_block(struct gfs2_rgrpd *rgd, u64 block) struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk) { - struct gfs2_rgrpd *rgd; + struct rb_node **newn, *parent = NULL; spin_lock(&sdp->sd_rindex_spin); - list_for_each_entry(rgd, &sdp->sd_rindex_mru_list, rd_list_mru) { - if (rgrp_contains_block(rgd, blk)) { - list_move(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list); + newn = &sdp->sd_rindex_tree.rb_node; + + /* Figure out where to put new node */ + while (*newn) { + struct gfs2_rgrpd *cur = rb_entry(*newn, struct gfs2_rgrpd, + rd_node); + + parent = *newn; + if (blk < cur->rd_addr) + newn = &((*newn)->rb_left); + else if (blk > cur->rd_data0 + cur->rd_data) + newn = &((*newn)->rb_right); + else { spin_unlock(&sdp->sd_rindex_spin); - return rgd; + return cur; } } @@ -354,8 +365,13 @@ struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk) struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp) { - gfs2_assert(sdp, !list_empty(&sdp->sd_rindex_list)); - return list_entry(sdp->sd_rindex_list.next, struct gfs2_rgrpd, rd_list); + const struct rb_node *n; + struct gfs2_rgrpd *rgd; + + n = rb_first(&sdp->sd_rindex_tree); + rgd = rb_entry(n, struct gfs2_rgrpd, rd_node); + + return rgd; } /** @@ -367,28 +383,34 @@ struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp) struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd) { - if (rgd->rd_list.next == &rgd->rd_sbd->sd_rindex_list) + struct gfs2_sbd *sdp = rgd->rd_sbd; + const struct rb_node *n; + + spin_lock(&sdp->sd_rindex_spin); + n = rb_next(&rgd->rd_node); + if (n == NULL) + n = rb_first(&sdp->sd_rindex_tree); + + if (unlikely(&rgd->rd_node == n)) { + spin_unlock(&sdp->sd_rindex_spin); return NULL; - return list_entry(rgd->rd_list.next, struct gfs2_rgrpd, rd_list); + } + rgd = rb_entry(n, struct gfs2_rgrpd, rd_node); + spin_unlock(&sdp->sd_rindex_spin); + return rgd; } static void clear_rgrpdi(struct gfs2_sbd *sdp) { - struct list_head *head; + struct rb_node *n; struct gfs2_rgrpd *rgd; struct gfs2_glock *gl; - spin_lock(&sdp->sd_rindex_spin); - sdp->sd_rindex_forward = NULL; - spin_unlock(&sdp->sd_rindex_spin); - - head = &sdp->sd_rindex_list; - while (!list_empty(head)) { - rgd = list_entry(head->next, struct gfs2_rgrpd, rd_list); + while ((n = rb_first(&sdp->sd_rindex_tree))) { + rgd = rb_entry(n, struct gfs2_rgrpd, rd_node); gl = rgd->rd_gl; - list_del(&rgd->rd_list); - list_del(&rgd->rd_list_mru); + rb_erase(n, &sdp->sd_rindex_tree); if (gl) { gl->gl_object = NULL; @@ -535,6 +557,29 @@ static void gfs2_rindex_in(struct gfs2_rgrpd *rgd, const void *buf) rgd->rd_bitbytes = be32_to_cpu(str->ri_bitbytes); } +static void rgd_insert(struct gfs2_rgrpd *rgd) +{ + struct gfs2_sbd *sdp = rgd->rd_sbd; + struct rb_node **newn = &sdp->sd_rindex_tree.rb_node, *parent = NULL; + + /* Figure out where to put new node */ + while (*newn) { + struct gfs2_rgrpd *cur = rb_entry(*newn, struct gfs2_rgrpd, + rd_node); + + parent = *newn; + if (rgd->rd_addr < cur->rd_addr) + newn = &((*newn)->rb_left); + else if (rgd->rd_addr > cur->rd_addr) + newn = &((*newn)->rb_right); + else + return; + } + + rb_link_node(&rgd->rd_node, parent, newn); + rb_insert_color(&rgd->rd_node, &sdp->sd_rindex_tree); +} + /** * read_rindex_entry - Pull in a new resource index entry from the disk * @gl: The glock covering the rindex inode @@ -566,14 +611,11 @@ static int read_rindex_entry(struct gfs2_inode *ip, if (!rgd) return error; - mutex_init(&rgd->rd_mutex); - lops_init_le(&rgd->rd_le, &gfs2_rg_lops); rgd->rd_sbd = sdp; - list_add_tail(&rgd->rd_list, &sdp->sd_rindex_list); - list_add_tail(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list); - gfs2_rindex_in(rgd, buf); + rgd_insert(rgd); + error = compute_bitstructs(rgd); if (error) return error; @@ -585,6 +627,8 @@ static int read_rindex_entry(struct gfs2_inode *ip, rgd->rd_gl->gl_object = rgd; rgd->rd_flags &= ~GFS2_RDF_UPTODATE; + if (rgd->rd_data > sdp->sd_max_rg_data) + sdp->sd_max_rg_data = rgd->rd_data; return error; } @@ -601,8 +645,6 @@ int gfs2_ri_update(struct gfs2_inode *ip) struct inode *inode = &ip->i_inode; struct file_ra_state ra_state; u64 rgrp_count = i_size_read(inode); - struct gfs2_rgrpd *rgd; - unsigned int max_data = 0; int error; do_div(rgrp_count, sizeof(struct gfs2_rindex)); @@ -617,10 +659,6 @@ int gfs2_ri_update(struct gfs2_inode *ip) } } - list_for_each_entry(rgd, &sdp->sd_rindex_list, rd_list) - if (rgd->rd_data > max_data) - max_data = rgd->rd_data; - sdp->sd_max_rg_data = max_data; sdp->sd_rindex_uptodate = 1; return 0; } @@ -694,7 +732,7 @@ static void gfs2_rgrp_out(struct gfs2_rgrpd *rgd, void *buf) } /** - * gfs2_rgrp_bh_get - Read in a RG's header and bitmaps + * gfs2_rgrp_go_lock - Read in a RG's header and bitmaps * @rgd: the struct gfs2_rgrpd describing the RG to read in * * Read in all of a Resource Group's header and bitmap blocks. @@ -703,8 +741,9 @@ static void gfs2_rgrp_out(struct gfs2_rgrpd *rgd, void *buf) * Returns: errno */ -int gfs2_rgrp_bh_get(struct gfs2_rgrpd *rgd) +int gfs2_rgrp_go_lock(struct gfs2_holder *gh) { + struct gfs2_rgrpd *rgd = gh->gh_gl->gl_object; struct gfs2_sbd *sdp = rgd->rd_sbd; struct gfs2_glock *gl = rgd->rd_gl; unsigned int length = rgd->rd_length; @@ -712,17 +751,6 @@ int gfs2_rgrp_bh_get(struct gfs2_rgrpd *rgd) unsigned int x, y; int error; - mutex_lock(&rgd->rd_mutex); - - spin_lock(&sdp->sd_rindex_spin); - if (rgd->rd_bh_count) { - rgd->rd_bh_count++; - spin_unlock(&sdp->sd_rindex_spin); - mutex_unlock(&rgd->rd_mutex); - return 0; - } - spin_unlock(&sdp->sd_rindex_spin); - for (x = 0; x < length; x++) { bi = rgd->rd_bits + x; error = gfs2_meta_read(gl, rgd->rd_addr + x, 0, &bi->bi_bh); @@ -747,15 +775,9 @@ int gfs2_rgrp_bh_get(struct gfs2_rgrpd *rgd) clear_bit(GBF_FULL, &rgd->rd_bits[x].bi_flags); gfs2_rgrp_in(rgd, (rgd->rd_bits[0].bi_bh)->b_data); rgd->rd_flags |= (GFS2_RDF_UPTODATE | GFS2_RDF_CHECK); + rgd->rd_free_clone = rgd->rd_free; } - spin_lock(&sdp->sd_rindex_spin); - rgd->rd_free_clone = rgd->rd_free; - rgd->rd_bh_count++; - spin_unlock(&sdp->sd_rindex_spin); - - mutex_unlock(&rgd->rd_mutex); - return 0; fail: @@ -765,52 +787,32 @@ fail: bi->bi_bh = NULL; gfs2_assert_warn(sdp, !bi->bi_clone); } - mutex_unlock(&rgd->rd_mutex); return error; } -void gfs2_rgrp_bh_hold(struct gfs2_rgrpd *rgd) -{ - struct gfs2_sbd *sdp = rgd->rd_sbd; - - spin_lock(&sdp->sd_rindex_spin); - gfs2_assert_warn(rgd->rd_sbd, rgd->rd_bh_count); - rgd->rd_bh_count++; - spin_unlock(&sdp->sd_rindex_spin); -} - /** - * gfs2_rgrp_bh_put - Release RG bitmaps read in with gfs2_rgrp_bh_get() + * gfs2_rgrp_go_unlock - Release RG bitmaps read in with gfs2_rgrp_bh_get() * @rgd: the struct gfs2_rgrpd describing the RG to read in * */ -void gfs2_rgrp_bh_put(struct gfs2_rgrpd *rgd) +void gfs2_rgrp_go_unlock(struct gfs2_holder *gh) { - struct gfs2_sbd *sdp = rgd->rd_sbd; + struct gfs2_rgrpd *rgd = gh->gh_gl->gl_object; int x, length = rgd->rd_length; - spin_lock(&sdp->sd_rindex_spin); - gfs2_assert_warn(rgd->rd_sbd, rgd->rd_bh_count); - if (--rgd->rd_bh_count) { - spin_unlock(&sdp->sd_rindex_spin); - return; - } - for (x = 0; x < length; x++) { struct gfs2_bitmap *bi = rgd->rd_bits + x; - kfree(bi->bi_clone); - bi->bi_clone = NULL; brelse(bi->bi_bh); bi->bi_bh = NULL; } - spin_unlock(&sdp->sd_rindex_spin); } -static void gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset, - const struct gfs2_bitmap *bi) +void gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset, + struct buffer_head *bh, + const struct gfs2_bitmap *bi) { struct super_block *sb = sdp->sd_vfs; struct block_device *bdev = sb->s_bdev; @@ -823,7 +825,7 @@ static void gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset, unsigned int x; for (x = 0; x < bi->bi_len; x++) { - const u8 *orig = bi->bi_bh->b_data + bi->bi_offset + x; + const u8 *orig = bh->b_data + bi->bi_offset + x; const u8 *clone = bi->bi_clone + bi->bi_offset + x; u8 diff = ~(*orig | (*orig >> 1)) & (*clone | (*clone >> 1)); diff &= 0x55; @@ -862,28 +864,6 @@ fail: sdp->sd_args.ar_discard = 0; } -void gfs2_rgrp_repolish_clones(struct gfs2_rgrpd *rgd) -{ - struct gfs2_sbd *sdp = rgd->rd_sbd; - unsigned int length = rgd->rd_length; - unsigned int x; - - for (x = 0; x < length; x++) { - struct gfs2_bitmap *bi = rgd->rd_bits + x; - if (!bi->bi_clone) - continue; - if (sdp->sd_args.ar_discard) - gfs2_rgrp_send_discards(sdp, rgd->rd_data0, bi); - clear_bit(GBF_FULL, &bi->bi_flags); - memcpy(bi->bi_clone + bi->bi_offset, - bi->bi_bh->b_data + bi->bi_offset, bi->bi_len); - } - - spin_lock(&sdp->sd_rindex_spin); - rgd->rd_free_clone = rgd->rd_free; - spin_unlock(&sdp->sd_rindex_spin); -} - /** * gfs2_alloc_get - get the struct gfs2_alloc structure for an inode * @ip: the incore GFS2 inode structure @@ -911,20 +891,15 @@ struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip) static int try_rgrp_fit(struct gfs2_rgrpd *rgd, struct gfs2_alloc *al) { - struct gfs2_sbd *sdp = rgd->rd_sbd; - int ret = 0; - if (rgd->rd_flags & (GFS2_RGF_NOALLOC | GFS2_RDF_ERROR)) return 0; - spin_lock(&sdp->sd_rindex_spin); if (rgd->rd_free_clone >= al->al_requested) { al->al_rgd = rgd; - ret = 1; + return 1; } - spin_unlock(&sdp->sd_rindex_spin); - return ret; + return 0; } /** @@ -992,76 +967,6 @@ static void try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked, u64 skip } /** - * recent_rgrp_next - get next RG from "recent" list - * @cur_rgd: current rgrp - * - * Returns: The next rgrp in the recent list - */ - -static struct gfs2_rgrpd *recent_rgrp_next(struct gfs2_rgrpd *cur_rgd) -{ - struct gfs2_sbd *sdp = cur_rgd->rd_sbd; - struct list_head *head; - struct gfs2_rgrpd *rgd; - - spin_lock(&sdp->sd_rindex_spin); - head = &sdp->sd_rindex_mru_list; - if (unlikely(cur_rgd->rd_list_mru.next == head)) { - spin_unlock(&sdp->sd_rindex_spin); - return NULL; - } - rgd = list_entry(cur_rgd->rd_list_mru.next, struct gfs2_rgrpd, rd_list_mru); - spin_unlock(&sdp->sd_rindex_spin); - return rgd; -} - -/** - * forward_rgrp_get - get an rgrp to try next from full list - * @sdp: The GFS2 superblock - * - * Returns: The rgrp to try next - */ - -static struct gfs2_rgrpd *forward_rgrp_get(struct gfs2_sbd *sdp) -{ - struct gfs2_rgrpd *rgd; - unsigned int journals = gfs2_jindex_size(sdp); - unsigned int rg = 0, x; - - spin_lock(&sdp->sd_rindex_spin); - - rgd = sdp->sd_rindex_forward; - if (!rgd) { - if (sdp->sd_rgrps >= journals) - rg = sdp->sd_rgrps * sdp->sd_jdesc->jd_jid / journals; - - for (x = 0, rgd = gfs2_rgrpd_get_first(sdp); x < rg; - x++, rgd = gfs2_rgrpd_get_next(rgd)) - /* Do Nothing */; - - sdp->sd_rindex_forward = rgd; - } - - spin_unlock(&sdp->sd_rindex_spin); - - return rgd; -} - -/** - * forward_rgrp_set - set the forward rgrp pointer - * @sdp: the filesystem - * @rgd: The new forward rgrp - * - */ - -static void forward_rgrp_set(struct gfs2_sbd *sdp, struct gfs2_rgrpd *rgd) -{ - spin_lock(&sdp->sd_rindex_spin); - sdp->sd_rindex_forward = rgd; - spin_unlock(&sdp->sd_rindex_spin); -} - -/** * get_local_rgrp - Choose and lock a rgrp for allocation * @ip: the inode to reserve space for * @rgp: the chosen and locked rgrp @@ -1076,14 +981,15 @@ static int get_local_rgrp(struct gfs2_inode *ip, u64 *last_unlinked) struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); struct gfs2_rgrpd *rgd, *begin = NULL; struct gfs2_alloc *al = ip->i_alloc; - int flags = LM_FLAG_TRY; - int skipped = 0; - int loops = 0; int error, rg_locked; + int loops = 0; - rgd = gfs2_blk2rgrpd(sdp, ip->i_goal); + rgd = begin = gfs2_blk2rgrpd(sdp, ip->i_goal); - while (rgd) { + if (rgd == NULL) + return -EBADSLT; + + while (loops < 3) { rg_locked = 0; if (gfs2_glock_is_locked_by_me(rgd->rd_gl)) { @@ -1096,80 +1002,24 @@ static int get_local_rgrp(struct gfs2_inode *ip, u64 *last_unlinked) switch (error) { case 0: if (try_rgrp_fit(rgd, al)) - goto out; + return 0; if (rgd->rd_flags & GFS2_RDF_CHECK) try_rgrp_unlink(rgd, last_unlinked, ip->i_no_addr); if (!rg_locked) gfs2_glock_dq_uninit(&al->al_rgd_gh); /* fall through */ case GLR_TRYFAILED: - rgd = recent_rgrp_next(rgd); - break; - - default: - return error; - } - } - - /* Go through full list of rgrps */ - - begin = rgd = forward_rgrp_get(sdp); - - for (;;) { - rg_locked = 0; - - if (gfs2_glock_is_locked_by_me(rgd->rd_gl)) { - rg_locked = 1; - error = 0; - } else { - error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, flags, - &al->al_rgd_gh); - } - switch (error) { - case 0: - if (try_rgrp_fit(rgd, al)) - goto out; - if (rgd->rd_flags & GFS2_RDF_CHECK) - try_rgrp_unlink(rgd, last_unlinked, ip->i_no_addr); - if (!rg_locked) - gfs2_glock_dq_uninit(&al->al_rgd_gh); - break; - - case GLR_TRYFAILED: - skipped++; + rgd = gfs2_rgrpd_get_next(rgd); + if (rgd == begin) + loops++; break; default: return error; } - - rgd = gfs2_rgrpd_get_next(rgd); - if (!rgd) - rgd = gfs2_rgrpd_get_first(sdp); - - if (rgd == begin) { - if (++loops >= 3) - return -ENOSPC; - if (!skipped) - loops++; - flags = 0; - if (loops == 2) - gfs2_log_flush(sdp, NULL); - } - } - -out: - if (begin) { - spin_lock(&sdp->sd_rindex_spin); - list_move(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list); - spin_unlock(&sdp->sd_rindex_spin); - rgd = gfs2_rgrpd_get_next(rgd); - if (!rgd) - rgd = gfs2_rgrpd_get_first(sdp); - forward_rgrp_set(sdp, rgd); } - return 0; + return -ENOSPC; } /** @@ -1352,6 +1202,7 @@ do_search: /* The GFS2_BLKST_UNLINKED state doesn't apply to the clone bitmaps, so we must search the originals for that. */ buffer = bi->bi_bh->b_data + bi->bi_offset; + WARN_ON(!buffer_uptodate(bi->bi_bh)); if (old_state != GFS2_BLKST_UNLINKED && bi->bi_clone) buffer = bi->bi_clone + bi->bi_offset; @@ -1371,6 +1222,7 @@ skip: if (blk == BFITNOENT) return blk; + *n = 1; if (old_state == new_state) goto out; @@ -1539,9 +1391,7 @@ int gfs2_alloc_block(struct gfs2_inode *ip, u64 *bn, unsigned int *n) gfs2_statfs_change(sdp, 0, -(s64)*n, 0); gfs2_quota_change(ip, *n, ip->i_inode.i_uid, ip->i_inode.i_gid); - spin_lock(&sdp->sd_rindex_spin); rgd->rd_free_clone -= *n; - spin_unlock(&sdp->sd_rindex_spin); trace_gfs2_block_alloc(ip, block, *n, GFS2_BLKST_USED); *bn = block; return 0; @@ -1594,9 +1444,7 @@ int gfs2_alloc_di(struct gfs2_inode *dip, u64 *bn, u64 *generation) gfs2_statfs_change(sdp, 0, -1, +1); gfs2_trans_add_unrevoke(sdp, block, 1); - spin_lock(&sdp->sd_rindex_spin); rgd->rd_free_clone--; - spin_unlock(&sdp->sd_rindex_spin); trace_gfs2_block_alloc(dip, block, 1, GFS2_BLKST_DINODE); *bn = block; return 0; @@ -1629,8 +1477,6 @@ void __gfs2_free_blocks(struct gfs2_inode *ip, u64 bstart, u32 blen, int meta) gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); - gfs2_trans_add_rg(rgd); - /* Directories keep their data in the metadata address space */ if (meta || ip->i_depth) gfs2_meta_wipe(ip, bstart, blen); @@ -1666,7 +1512,6 @@ void gfs2_unlink_di(struct inode *inode) trace_gfs2_block_alloc(ip, blkno, 1, GFS2_BLKST_UNLINKED); gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); - gfs2_trans_add_rg(rgd); } static void gfs2_free_uninit_di(struct gfs2_rgrpd *rgd, u64 blkno) @@ -1688,7 +1533,6 @@ static void gfs2_free_uninit_di(struct gfs2_rgrpd *rgd, u64 blkno) gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); gfs2_statfs_change(sdp, 0, +1, -1); - gfs2_trans_add_rg(rgd); } |