diff options
Diffstat (limited to 'fs/gfs2/rgrp.c')
| -rw-r--r-- | fs/gfs2/rgrp.c | 143 |
1 files changed, 94 insertions, 49 deletions
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c index 5650382..de32397 100644 --- a/fs/gfs2/rgrp.c +++ b/fs/gfs2/rgrp.c @@ -29,7 +29,6 @@ #include "util.h" #include "log.h" #include "inode.h" -#include "ops_address.h" #define BFITNOENT ((u32)~0) #define NO_BLOCK ((u64)~0) @@ -442,6 +441,7 @@ static int compute_bitstructs(struct gfs2_rgrpd *rgd) for (x = 0; x < length; x++) { bi = rgd->rd_bits + x; + bi->bi_flags = 0; /* small rgrp; bitmap stored completely in header block */ if (length == 1) { bytes = bytes_left; @@ -580,7 +580,6 @@ static int read_rindex_entry(struct gfs2_inode *ip, rgd->rd_gl->gl_object = rgd; rgd->rd_flags &= ~GFS2_RDF_UPTODATE; - rgd->rd_flags |= GFS2_RDF_CHECK; return error; } @@ -701,10 +700,9 @@ static void gfs2_rgrp_in(struct gfs2_rgrpd *rgd, const void *buf) u32 rg_flags; rg_flags = be32_to_cpu(str->rg_flags); - if (rg_flags & GFS2_RGF_NOALLOC) - rgd->rd_flags |= GFS2_RDF_NOALLOC; - else - rgd->rd_flags &= ~GFS2_RDF_NOALLOC; + rg_flags &= ~GFS2_RDF_MASK; + rgd->rd_flags &= GFS2_RDF_MASK; + rgd->rd_flags |= rg_flags; rgd->rd_free = be32_to_cpu(str->rg_free); rgd->rd_dinodes = be32_to_cpu(str->rg_dinodes); rgd->rd_igeneration = be64_to_cpu(str->rg_igeneration); @@ -713,11 +711,8 @@ static void gfs2_rgrp_in(struct gfs2_rgrpd *rgd, const void *buf) static void gfs2_rgrp_out(struct gfs2_rgrpd *rgd, void *buf) { struct gfs2_rgrp *str = buf; - u32 rg_flags = 0; - if (rgd->rd_flags & GFS2_RDF_NOALLOC) - rg_flags |= GFS2_RGF_NOALLOC; - str->rg_flags = cpu_to_be32(rg_flags); + str->rg_flags = cpu_to_be32(rgd->rd_flags & ~GFS2_RDF_MASK); str->rg_free = cpu_to_be32(rgd->rd_free); str->rg_dinodes = cpu_to_be32(rgd->rd_dinodes); str->__pad = cpu_to_be32(0); @@ -775,8 +770,10 @@ int gfs2_rgrp_bh_get(struct gfs2_rgrpd *rgd) } if (!(rgd->rd_flags & GFS2_RDF_UPTODATE)) { + for (x = 0; x < length; x++) + 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; + rgd->rd_flags |= (GFS2_RDF_UPTODATE | GFS2_RDF_CHECK); } spin_lock(&sdp->sd_rindex_spin); @@ -845,7 +842,7 @@ static void gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset, struct super_block *sb = sdp->sd_vfs; struct block_device *bdev = sb->s_bdev; const unsigned int sects_per_blk = sdp->sd_sb.sb_bsize / - bdev_hardsect_size(sb->s_bdev); + bdev_logical_block_size(sb->s_bdev); u64 blk; sector_t start = 0; sector_t nr_sects = 0; @@ -903,6 +900,7 @@ void gfs2_rgrp_repolish_clones(struct gfs2_rgrpd *rgd) 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); } @@ -942,7 +940,7 @@ 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_RDF_NOALLOC) + if (rgd->rd_flags & (GFS2_RGF_NOALLOC | GFS2_RDF_ERROR)) return 0; spin_lock(&sdp->sd_rindex_spin); @@ -1315,30 +1313,37 @@ static u32 rgblk_search(struct gfs2_rgrpd *rgd, u32 goal, { struct gfs2_bitmap *bi = NULL; const u32 length = rgd->rd_length; - u32 blk = 0; + u32 blk = BFITNOENT; unsigned int buf, x; const unsigned int elen = *n; - const u8 *buffer; + const u8 *buffer = NULL; *n = 0; /* Find bitmap block that contains bits for goal block */ for (buf = 0; buf < length; buf++) { bi = rgd->rd_bits + buf; - if (goal < (bi->bi_start + bi->bi_len) * GFS2_NBBY) - break; + /* Convert scope of "goal" from rgrp-wide to within found bit block */ + if (goal < (bi->bi_start + bi->bi_len) * GFS2_NBBY) { + goal -= bi->bi_start * GFS2_NBBY; + goto do_search; + } } + buf = 0; + goal = 0; - gfs2_assert(rgd->rd_sbd, buf < length); - - /* Convert scope of "goal" from rgrp-wide to within found bit block */ - goal -= bi->bi_start * GFS2_NBBY; - +do_search: /* Search (up to entire) bitmap in this rgrp for allocatable block. "x <= length", instead of "x < length", because we typically start the search in the middle of a bit block, but if we can't find an allocatable block anywhere else, we want to be able wrap around and search in the first part of our first-searched bit block. */ for (x = 0; x <= length; x++) { + bi = rgd->rd_bits + buf; + + if (test_bit(GBF_FULL, &bi->bi_flags) && + (old_state == GFS2_BLKST_FREE)) + goto skip; + /* 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; @@ -1349,33 +1354,39 @@ static u32 rgblk_search(struct gfs2_rgrpd *rgd, u32 goal, if (blk != BFITNOENT) break; + if ((goal == 0) && (old_state == GFS2_BLKST_FREE)) + set_bit(GBF_FULL, &bi->bi_flags); + /* Try next bitmap block (wrap back to rgrp header if at end) */ - buf = (buf + 1) % length; - bi = rgd->rd_bits + buf; +skip: + buf++; + buf %= length; goal = 0; } - if (blk != BFITNOENT && old_state != new_state) { - *n = 1; - gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1); + if (blk == BFITNOENT) + return blk; + *n = 1; + if (old_state == new_state) + goto out; + + gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1); + gfs2_setbit(rgd, bi->bi_bh->b_data, bi->bi_clone, bi->bi_offset, + bi->bi_len, blk, new_state); + goal = blk; + while (*n < elen) { + goal++; + if (goal >= (bi->bi_len * GFS2_NBBY)) + break; + if (gfs2_testbit(rgd, buffer, bi->bi_len, goal) != + GFS2_BLKST_FREE) + break; gfs2_setbit(rgd, bi->bi_bh->b_data, bi->bi_clone, bi->bi_offset, - bi->bi_len, blk, new_state); - goal = blk; - while (*n < elen) { - goal++; - if (goal >= (bi->bi_len * GFS2_NBBY)) - break; - if (gfs2_testbit(rgd, buffer, bi->bi_len, goal) != - GFS2_BLKST_FREE) - break; - gfs2_setbit(rgd, bi->bi_bh->b_data, bi->bi_clone, - bi->bi_offset, bi->bi_len, goal, - new_state); - (*n)++; - } + bi->bi_len, goal, new_state); + (*n)++; } - - return (blk == BFITNOENT) ? blk : (bi->bi_start * GFS2_NBBY) + blk; +out: + return (bi->bi_start * GFS2_NBBY) + blk; } /** @@ -1435,13 +1446,33 @@ static struct gfs2_rgrpd *rgblk_free(struct gfs2_sbd *sdp, u64 bstart, } /** - * gfs2_alloc_block - Allocate a block + * gfs2_rgrp_dump - print out an rgrp + * @seq: The iterator + * @gl: The glock in question + * + */ + +int gfs2_rgrp_dump(struct seq_file *seq, const struct gfs2_glock *gl) +{ + const struct gfs2_rgrpd *rgd = gl->gl_object; + if (rgd == NULL) + return 0; + gfs2_print_dbg(seq, " R: n:%llu f:%02x b:%u/%u i:%u\n", + (unsigned long long)rgd->rd_addr, rgd->rd_flags, + rgd->rd_free, rgd->rd_free_clone, rgd->rd_dinodes); + return 0; +} + +/** + * gfs2_alloc_block - Allocate one or more blocks * @ip: the inode to allocate the block for + * @bn: Used to return the starting block number + * @n: requested number of blocks/extent length (value/result) * - * Returns: the allocated block + * Returns: 0 or error */ -u64 gfs2_alloc_block(struct gfs2_inode *ip, unsigned int *n) +int gfs2_alloc_block(struct gfs2_inode *ip, u64 *bn, unsigned int *n) { struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); struct buffer_head *dibh; @@ -1457,7 +1488,10 @@ u64 gfs2_alloc_block(struct gfs2_inode *ip, unsigned int *n) goal = rgd->rd_last_alloc; blk = rgblk_search(rgd, goal, GFS2_BLKST_FREE, GFS2_BLKST_USED, n); - BUG_ON(blk == BFITNOENT); + + /* Since all blocks are reserved in advance, this shouldn't happen */ + if (blk == BFITNOENT) + goto rgrp_error; rgd->rd_last_alloc = blk; block = rgd->rd_data0 + blk; @@ -1469,7 +1503,9 @@ u64 gfs2_alloc_block(struct gfs2_inode *ip, unsigned int *n) di->di_goal_meta = di->di_goal_data = cpu_to_be64(ip->i_goal); brelse(dibh); } - gfs2_assert_withdraw(sdp, rgd->rd_free >= *n); + if (rgd->rd_free < *n) + goto rgrp_error; + rgd->rd_free -= *n; gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); @@ -1484,7 +1520,16 @@ u64 gfs2_alloc_block(struct gfs2_inode *ip, unsigned int *n) rgd->rd_free_clone -= *n; spin_unlock(&sdp->sd_rindex_spin); - return block; + *bn = block; + return 0; + +rgrp_error: + fs_warn(sdp, "rgrp %llu has an error, marking it readonly until umount\n", + (unsigned long long)rgd->rd_addr); + fs_warn(sdp, "umount on all nodes and run fsck.gfs2 to fix the error\n"); + gfs2_rgrp_dump(NULL, rgd->rd_gl); + rgd->rd_flags |= GFS2_RDF_ERROR; + return -EIO; } /** |