static struct dentry *gfs2_get_dentry(struct super_block *sb, void *inum_obj) { struct gfs2_sbd *sdp = sb->s_fs_info; struct gfs2_inum_host *inum = inum_obj; struct inode *inode; struct dentry *dentry; inode = gfs2_ilookup(sb, inum->no_addr); if (inode) { if (GFS2_I(inode)->i_no_formal_ino != inum->no_formal_ino) { iput(inode); return ERR_PTR(-ESTALE); } } else { inode = gfs2_lookup_by_inum(sdp, inum->no_addr, &inum->no_formal_ino, GFS2_BLKST_DINODE); if (inode == ERR_PTR(-ENOENT)) inode = gfs2_ilookup(sb, inum->no_addr); } if (IS_ERR(inode)) return ERR_CAST(inode); dentry = d_alloc_anon(inode); if (!dentry) { iput(inode); return ERR_PTR(-ENOMEM); } dentry->d_op = &gfs2_dops; return dentry; }
static struct dentry *gfs2_get_dentry(struct super_block *sb, struct gfs2_inum_host *inum) { struct gfs2_sbd *sdp = sb->s_fs_info; struct inode *inode; struct dentry *dentry; inode = gfs2_ilookup(sb, inum->no_addr); if (inode) { if (GFS2_I(inode)->i_no_formal_ino != inum->no_formal_ino) { iput(inode); return ERR_PTR(-ESTALE); } goto out_inode; } inode = gfs2_lookup_by_inum(sdp, inum->no_addr, &inum->no_formal_ino, GFS2_BLKST_DINODE); if (IS_ERR(inode)) return ERR_CAST(inode); out_inode: dentry = d_obtain_alias(inode); if (!IS_ERR(dentry)) dentry->d_op = &gfs2_dops; return dentry; }
static struct dentry *gfs2_get_dentry(struct super_block *sb, struct gfs2_inum_host *inum) { struct gfs2_sbd *sdp = sb->s_fs_info; struct gfs2_fh_obj *fh_obj = (struct gfs2_fh_obj *)inum_obj; struct gfs2_holder i_gh, ri_gh, rgd_gh; struct gfs2_rgrpd *rgd; struct inode *inode; struct dentry *dentry; int error; /* System files? */ inode = gfs2_ilookup(sb, inum); if (inode) { if (GFS2_I(inode)->i_num.no_formal_ino != inum->no_formal_ino) { iput(inode); return ERR_PTR(-ESTALE); } goto out_inode; } error = gfs2_glock_nq_num(sdp, inum->no_addr, &gfs2_inode_glops, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); if (error) return ERR_PTR(error); error = gfs2_rindex_hold(sdp, &ri_gh); 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, inum, fh_obj->imode); if (!inode) goto fail; if (IS_ERR(inode)) { error = PTR_ERR(inode); goto fail; } error = gfs2_inode_refresh(GFS2_I(inode)); if (error) { iput(inode); goto fail; } error = -EIO; if (GFS2_I(inode)->i_di.di_flags & GFS2_DIF_SYSTEM) { iput(inode); goto fail; } gfs2_glock_dq_uninit(&i_gh); out_inode: dentry = d_alloc_anon(inode); if (!dentry) { iput(inode); return ERR_PTR(-ENOMEM); } 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); }
static int gfs2_get_name(struct dentry *parent, char *name, struct dentry *child) { struct inode *dir = parent->d_inode; struct inode *inode = child->d_inode; struct gfs2_inode *dip, *ip; struct get_name_filldir gnfd; struct gfs2_holder gh; u64 offset = 0; int error; struct file_ra_state f_ra = { .start = 0 }; if (!dir) return -EINVAL; if (!S_ISDIR(dir->i_mode) || !inode) return -EINVAL; dip = GFS2_I(dir); ip = GFS2_I(inode); *name = 0; gnfd.inum.no_addr = ip->i_no_addr; gnfd.inum.no_formal_ino = ip->i_no_formal_ino; gnfd.name = name; error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &gh); if (error) return error; error = gfs2_dir_read(dir, &offset, &gnfd, get_name_filldir, &f_ra); gfs2_glock_dq_uninit(&gh); if (!error && !*name) error = -ENOENT; return error; } static struct dentry *gfs2_get_parent(struct dentry *child) { return d_obtain_alias(gfs2_lookupi(child->d_inode, &gfs2_qdotdot, 1)); } static struct dentry *gfs2_get_dentry(struct super_block *sb, struct gfs2_inum_host *inum) { struct gfs2_sbd *sdp = sb->s_fs_info; struct inode *inode; inode = gfs2_ilookup(sb, inum->no_addr, 0); if (inode) { if (GFS2_I(inode)->i_no_formal_ino != inum->no_formal_ino) { iput(inode); return ERR_PTR(-ESTALE); } goto out_inode; } inode = gfs2_lookup_by_inum(sdp, inum->no_addr, &inum->no_formal_ino, GFS2_BLKST_DINODE); if (IS_ERR(inode)) return ERR_CAST(inode); out_inode: return d_obtain_alias(inode); } static struct dentry *gfs2_fh_to_dentry(struct super_block *sb, struct fid *fid, int fh_len, int fh_type) { struct gfs2_inum_host this; __be32 *fh = (__force __be32 *)fid->raw; switch (fh_type) { case GFS2_SMALL_FH_SIZE: case GFS2_LARGE_FH_SIZE: case GFS2_OLD_FH_SIZE: this.no_formal_ino = ((u64)be32_to_cpu(fh[0])) << 32; this.no_formal_ino |= be32_to_cpu(fh[1]); this.no_addr = ((u64)be32_to_cpu(fh[2])) << 32; this.no_addr |= be32_to_cpu(fh[3]); return gfs2_get_dentry(sb, &this); default: return NULL; } } static struct dentry *gfs2_fh_to_parent(struct super_block *sb, struct fid *fid, int fh_len, int fh_type) { struct gfs2_inum_host parent; __be32 *fh = (__force __be32 *)fid->raw; switch (fh_type) { case GFS2_LARGE_FH_SIZE: case GFS2_OLD_FH_SIZE: parent.no_formal_ino = ((u64)be32_to_cpu(fh[4])) << 32; parent.no_formal_ino |= be32_to_cpu(fh[5]); parent.no_addr = ((u64)be32_to_cpu(fh[6])) << 32; parent.no_addr |= be32_to_cpu(fh[7]); return gfs2_get_dentry(sb, &parent); default: return NULL; } } const struct export_operations gfs2_export_ops = { .encode_fh = gfs2_encode_fh, .fh_to_dentry = gfs2_fh_to_dentry, .fh_to_parent = gfs2_fh_to_parent, .get_name = gfs2_get_name, .get_parent = gfs2_get_parent, };
static struct dentry *gfs2_get_dentry(struct super_block *sb, struct gfs2_inum_host *inum) { struct gfs2_sbd *sdp = sb->s_fs_info; struct gfs2_holder i_gh; struct inode *inode; struct dentry *dentry; int error; inode = gfs2_ilookup(sb, inum->no_addr); if (inode) { if (GFS2_I(inode)->i_no_formal_ino != inum->no_formal_ino) { iput(inode); return ERR_PTR(-ESTALE); } goto out_inode; } error = gfs2_glock_nq_num(sdp, inum->no_addr, &gfs2_inode_glops, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); if (error) return ERR_PTR(error); error = gfs2_check_blk_type(sdp, inum->no_addr, GFS2_BLKST_DINODE); if (error) goto fail; inode = gfs2_inode_lookup(sb, DT_UNKNOWN, inum->no_addr, 0); if (IS_ERR(inode)) { error = PTR_ERR(inode); goto fail; } error = gfs2_inode_refresh(GFS2_I(inode)); if (error) { iput(inode); goto fail; } /* Pick up the works we bypass in gfs2_inode_lookup */ if (inode->i_state & I_NEW) gfs2_set_iop(inode); if (GFS2_I(inode)->i_no_formal_ino != inum->no_formal_ino) { iput(inode); goto fail; } error = -EIO; if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) { iput(inode); goto fail; } gfs2_glock_dq_uninit(&i_gh); out_inode: dentry = d_obtain_alias(inode); if (!IS_ERR(dentry)) dentry->d_op = &gfs2_dops; return dentry; fail: gfs2_glock_dq_uninit(&i_gh); return ERR_PTR(error); }