fs/gfs2/inode.c

271  * @dip: The directory
274 struct inode *gfs2_lookup_meta(struct inode *dip, const char *name)
280 	inode = gfs2_lookupi(dip, &qstr, 1);
312 	struct gfs2_inode *dip = GFS2_I(dir);
328 	if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) {
329 		error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
353  * @dip:  Directory in which dinode is to be created
360 static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
365 	error = gfs2_permission(&nop_mnt_idmap, &dip->i_inode,
371 	if (!dip->i_inode.i_nlink)
374 	if (dip->i_entries == (u32)-1)
376 	if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
382 static void munge_mode_uid_gid(const struct gfs2_inode *dip,
385 	if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
386 	    (dip->i_inode.i_mode & S_ISUID) &&
387 	    !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) {
390 		else if (!uid_eq(dip->i_inode.i_uid, current_fsuid()))
392 		inode->i_uid = dip->i_inode.i_uid;
396 	if (dip->i_inode.i_mode & S_ISGID) {
399 		inode->i_gid = dip->i_inode.i_gid;
554  * @dip: The directory this inode is being created in
560 static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip,
582 		gfs2_init_dir(dibh, dip);
595  * @dip: The directory we are linking into
607 static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip,
611 	return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) +
615 static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
618 	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
623 		error = gfs2_quota_lock_check(dip, &ap);
627 		error = gfs2_inplace_reserve(dip, &ap);
631 		error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0);
640 	error = gfs2_dir_add(&dip->i_inode, name, ip, da);
644 	gfs2_inplace_release(dip);
646 	gfs2_quota_unlock(dip);
695 	struct gfs2_inode *dip = GFS2_I(dir), *ip;
696 	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
707 	error = gfs2_qa_get(dip);
715 	error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, &d_gh);
720 	error = create_ok(dip, name, mode);
770 	munge_mode_uid_gid(dip, inode);
771 	check_and_update_goal(dip);
772 	ip->i_goal = dip->i_goal;
782 		if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) ||
788 		ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA);
795 	if (dip->i_diskflags & GFS2_DIF_SYSTEM)
800 	if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) ||
801 	    (dip->i_diskflags & GFS2_DIF_TOPDIR))
848 	init_dinode(dip, ip, symname);
870 	error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name,
875 	error = link_dinode(dip, name, ip, &da);
891 	gfs2_qa_put(dip);
935 	gfs2_qa_put(dip);
1027 	struct gfs2_inode *dip = GFS2_I(dir);
1039 	error = gfs2_qa_get(dip);
1043 	gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, &d_gh);
1074 	if (!dip->i_inode.i_nlink)
1077 	if (dip->i_entries == (u32)-1)
1092 		error = gfs2_quota_lock_check(dip, &ap);
1096 		error = gfs2_inplace_reserve(dip, &ap);
1100 		error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0);
1130 		gfs2_inplace_release(dip);
1133 		gfs2_quota_unlock(dip);
1140 	gfs2_qa_put(dip);
1148  * @dip: the directory
1152  * Assumes that the lock on (at least) @dip is held.
1157 static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
1165 	if ((dip->i_inode.i_mode & S_ISVTX) &&
1166 	    !uid_eq(dip->i_inode.i_uid, current_fsuid()) &&
1170 	if (IS_APPEND(&dip->i_inode))
1173 	error = gfs2_permission(&nop_mnt_idmap, &dip->i_inode,
1178 	return gfs2_dir_check(&dip->i_inode, name, ip);
1183  * @dip: The parent directory
1192 static int gfs2_unlink_inode(struct gfs2_inode *dip,
1199 	error = gfs2_dir_del(dip, dentry);
1229 	struct gfs2_inode *dip = GFS2_I(dir);
1243 	gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, &d_gh);
1275 	error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
1283 	error = gfs2_unlink_inode(dip, dentry);