diff options
| -rw-r--r-- | fs/gfs2/export.c | 36 | ||||
| -rw-r--r-- | fs/gfs2/rgrp.c | 42 | ||||
| -rw-r--r-- | fs/gfs2/rgrp.h | 4 | ||||
| -rw-r--r-- | fs/gfs2/super.c | 4 |
4 files changed, 51 insertions, 35 deletions
diff --git a/fs/gfs2/export.c b/fs/gfs2/export.c index 9200ef22171..d15876e9aa2 100644 --- a/fs/gfs2/export.c +++ b/fs/gfs2/export.c @@ -143,17 +143,14 @@ static struct dentry *gfs2_get_parent(struct dentry *child) } static struct dentry *gfs2_get_dentry(struct super_block *sb, - struct gfs2_inum_host *inum) + struct gfs2_inum_host *inum) { struct gfs2_sbd *sdp = sb->s_fs_info; - struct gfs2_holder i_gh, ri_gh, rgd_gh; - struct gfs2_rgrpd *rgd; + struct gfs2_holder i_gh; struct inode *inode; struct dentry *dentry; int error; - /* System files? */ - inode = gfs2_ilookup(sb, inum->no_addr); if (inode) { if (GFS2_I(inode)->i_no_formal_ino != inum->no_formal_ino) { @@ -168,29 +165,11 @@ static struct dentry *gfs2_get_dentry(struct super_block *sb, if (error) return ERR_PTR(error); - error = gfs2_rindex_hold(sdp, &ri_gh); + error = gfs2_check_blk_type(sdp, inum->no_addr, GFS2_BLKST_DINODE); if (error) goto fail; - error = -EINVAL; - rgd = gfs2_blk2rgrpd(sdp, inum->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; - - error = -ESTALE; - if (gfs2_get_block_type(rgd, inum->no_addr) != GFS2_BLKST_DINODE) - goto fail_rgd; - - gfs2_glock_dq_uninit(&rgd_gh); - gfs2_glock_dq_uninit(&ri_gh); - - inode = gfs2_inode_lookup(sb, DT_UNKNOWN, - inum->no_addr, - 0, 0); + inode = gfs2_inode_lookup(sb, DT_UNKNOWN, inum->no_addr, 0, 0); if (IS_ERR(inode)) { error = PTR_ERR(inode); goto fail; @@ -224,13 +203,6 @@ out_inode: if (!IS_ERR(dentry)) dentry->d_op = &gfs2_dops; return dentry; - -fail_rgd: - gfs2_glock_dq_uninit(&rgd_gh); - -fail_rindex: - gfs2_glock_dq_uninit(&ri_gh); - fail: gfs2_glock_dq_uninit(&i_gh); return ERR_PTR(error); diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c index 388a61d12fc..caaa665d403 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; @@ -1694,6 +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 diff --git a/fs/gfs2/rgrp.h b/fs/gfs2/rgrp.h index a8dedd78245..b4106ddaaa9 100644 --- a/fs/gfs2/rgrp.h +++ b/fs/gfs2/rgrp.h @@ -44,8 +44,6 @@ gfs2_inplace_reserve_i((ip), __FILE__, __LINE__) extern void gfs2_inplace_release(struct gfs2_inode *ip); -extern unsigned char gfs2_get_block_type(struct gfs2_rgrpd *rgd, u64 block); - extern int gfs2_alloc_block(struct gfs2_inode *ip, u64 *bn, unsigned int *n); extern int gfs2_alloc_di(struct gfs2_inode *ip, u64 *bn, u64 *generation); @@ -53,6 +51,8 @@ extern void gfs2_free_data(struct gfs2_inode *ip, u64 bstart, u32 blen); extern void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen); extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip); extern void gfs2_unlink_di(struct inode *inode); +extern int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr, + unsigned int type); struct gfs2_rgrp_list { unsigned int rl_rgrps; diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c index d95cf777d24..0ec3ec672de 100644 --- a/fs/gfs2/super.c +++ b/fs/gfs2/super.c @@ -1286,6 +1286,10 @@ static void gfs2_delete_inode(struct inode *inode) goto out; } + error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED); + if (error) + goto out_truncate; + gfs2_glock_dq_wait(&ip->i_iopen_gh); gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &ip->i_iopen_gh); error = gfs2_glock_nq(&ip->i_iopen_gh); |