diff options
Diffstat (limited to 'fs/gfs2/rgrp.c')
| -rw-r--r-- | fs/gfs2/rgrp.c | 82 |
1 files changed, 70 insertions, 12 deletions
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c index fba795798d3..18d3a28554a 100644 --- a/fs/gfs2/rgrp.c +++ b/fs/gfs2/rgrp.c @@ -1256,7 +1256,7 @@ void gfs2_inplace_release(struct gfs2_inode *ip) * Returns: The block type (GFS2_BLKST_*) */ -unsigned char gfs2_get_block_type(struct gfs2_rgrpd *rgd, u64 block) +static unsigned char gfs2_get_block_type(struct gfs2_rgrpd *rgd, u64 block) { struct gfs2_bitmap *bi = NULL; u32 length, rgrp_block, buf_block; @@ -1459,6 +1459,16 @@ int gfs2_rgrp_dump(struct seq_file *seq, const struct gfs2_glock *gl) return 0; } +static void gfs2_rgrp_error(struct gfs2_rgrpd *rgd) +{ + struct gfs2_sbd *sdp = rgd->rd_sbd; + 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; +} + /** * gfs2_alloc_block - Allocate one or more blocks * @ip: the inode to allocate the block for @@ -1520,22 +1530,20 @@ int gfs2_alloc_block(struct gfs2_inode *ip, u64 *bn, unsigned int *n) 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; + gfs2_rgrp_error(rgd); return -EIO; } /** * gfs2_alloc_di - Allocate a dinode * @dip: the directory that the inode is going in + * @bn: the block number which is allocated + * @generation: the generation number of the inode * - * Returns: the block allocated + * Returns: 0 on success or error */ -u64 gfs2_alloc_di(struct gfs2_inode *dip, u64 *generation) +int gfs2_alloc_di(struct gfs2_inode *dip, u64 *bn, u64 *generation) { struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); struct gfs2_alloc *al = dip->i_alloc; @@ -1546,16 +1554,21 @@ u64 gfs2_alloc_di(struct gfs2_inode *dip, u64 *generation) blk = rgblk_search(rgd, rgd->rd_last_alloc, GFS2_BLKST_FREE, GFS2_BLKST_DINODE, &n); - BUG_ON(blk == BFITNOENT); - rgd->rd_last_alloc = blk; + /* 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; + if (rgd->rd_free == 0) + goto rgrp_error; - gfs2_assert_withdraw(sdp, rgd->rd_free); rgd->rd_free--; rgd->rd_dinodes++; *generation = rgd->rd_igeneration++; + if (*generation == 0) + *generation = rgd->rd_igeneration++; 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); @@ -1568,7 +1581,12 @@ u64 gfs2_alloc_di(struct gfs2_inode *dip, u64 *generation) rgd->rd_free_clone--; spin_unlock(&sdp->sd_rindex_spin); trace_gfs2_block_alloc(dip, block, 1, GFS2_BLKST_DINODE); - return block; + *bn = block; + return 0; + +rgrp_error: + gfs2_rgrp_error(rgd); + return -EIO; } /** @@ -1676,6 +1694,46 @@ void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip) } /** + * gfs2_check_blk_type - Check the type of a block + * @sdp: The superblock + * @no_addr: The block number to check + * @type: The block type we are looking for + * + * Returns: 0 if the block type matches the expected type + * -ESTALE if it doesn't match + * or -ve errno if something went wrong while checking + */ + +int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr, unsigned int type) +{ + struct gfs2_rgrpd *rgd; + struct gfs2_holder ri_gh, rgd_gh; + int error; + + error = gfs2_rindex_hold(sdp, &ri_gh); + if (error) + goto fail; + + error = -EINVAL; + rgd = gfs2_blk2rgrpd(sdp, no_addr); + if (!rgd) + goto fail_rindex; + + error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_SHARED, 0, &rgd_gh); + if (error) + goto fail_rindex; + + if (gfs2_get_block_type(rgd, no_addr) != type) + error = -ESTALE; + + gfs2_glock_dq_uninit(&rgd_gh); +fail_rindex: + gfs2_glock_dq_uninit(&ri_gh); +fail: + return error; +} + +/** * gfs2_rlist_add - add a RG to a list of RGs * @sdp: the filesystem * @rlist: the list of resource groups |